JP4702153B2 - pilot - Google Patents

Description

  The present invention relates to a pilot for correcting the posture of a workpiece.

Conventionally, as a member that corrects the posture of a workpiece, a member that covers the entire workpiece and is provided with a wall for correcting the workpiece in the same direction as the wall of the hollow portion in which the workpiece is accommodated has been proposed (for example, a patent). Reference 1). When the workpiece is placed on the depression in an inappropriate state such as a rotated state, the workpiece correction member moves the wall for correcting the workpiece around the workpiece depression in parallel to the wall of the depression, The rotational state of the workpiece is corrected by moving the workpiece correction member to the indented portion in a state where the end portion of the workpiece is aligned with the wall surface for correcting the workpiece.
JP 2003-192121 A

  However, the workpiece correction member described in Patent Document 1 described above needs to cover the entire workpiece, and the workpiece correction member must be moved when correcting the posture of the workpiece, and the space occupied by the member. And there was a problem that the work space was large.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a pilot that can be made compact when correcting the posture of a workpiece.

  The present invention adopts the following means in order to achieve the above-mentioned object.

The pilot of the present invention
A pilot for guiding the posture of the workpiece to a predetermined posture by passing through an n-shaped (n is an integer of 3 or more) passage hole provided in the workpiece;
It is formed in a size that allows the passage hole of the workpiece to pass in a predetermined passage direction, has n restriction surfaces that can contact each side of the n-gon of the passage hole and is parallel to the passage direction, A workpiece regulation that regulates rotation of the workpiece around the central axis of the passage hole when the regulation surface comes into contact with each n-side of the passage hole when the posture of the workpiece becomes the predetermined posture. And
A skeleton formed by a plurality of the erected guide lines has guide lines erected from a predetermined position on the front end side of the line segments enclosing each control surface of the work restricting portion toward the front end. A work guide part that exhibits a shape that tapers from the work restriction part toward the tip;
With
When the workpiece is relatively moved such that the passage hole of the workpiece passes from the workpiece guide portion to the workpiece regulating portion, at least one side of n sides of the n-sided shape of the passage hole is the plurality of the plurality. Each of the n-sides of the through hole is in contact with each of the work restricting portions by applying a rotational moment so that the contacted guideline is in contact with any of the guideline and the work rotates about the central axis. The workpiece is guided so as to coincide with the regulation surface.

  In this pilot, when the workpiece is relatively moved so that the workpiece passage hole passes from the workpiece guide portion to the workpiece regulating portion, at least one of the n-sided n-side shapes of the passage holes is a plurality of guide lines. The contact guideline and the contacted guideline apply a rotational moment to the workpiece so that the workpiece rotates about the central axis, so that each n-side of the through hole coincides with each regulating surface of the workpiece regulating portion. To guide the work. The workpiece regulating unit regulates the rotation of the workpiece whose posture is corrected by the workpiece guiding unit, and sets the workpiece posture to a predetermined posture. In this way, the posture of the workpiece can be corrected with a size that can be inserted into a passage hole provided in the workpiece. Therefore, it is possible to reduce the size of the workpiece when correcting the posture of the workpiece. Here, the “regulatory surface” may be a surface surrounded by the restriction frame, or may be only the restriction frame surrounding the restriction surface. Further, “the work is moved relative to” may mean that the work is moved relative to the work guide, or the work guide is moved relative to the work. Further, the “passing hole” may be a through hole penetrating the workpiece or a bottomed hole that does not penetrate the workpiece.

  In the pilot of the present invention, the work guide part may be erected from both ends of the line segment on the tip side among the line segments in which the plurality of guide lines surround each regulation surface of the work regulation part. In this way, since two guidelines are erected from one side of each regulating surface, each n-sided shape of the workpiece passage hole can be rotated clockwise around the central axis, It can also rotate clockwise.

  In the pilot of the present invention, the work guide section may be erected so that the plurality of guide lines have the same length and angle with respect to the passing direction. By doing so, the distance between the guide line and the passage hole becomes equal, so that the workpiece can move straight and smoothly when moving from the workpiece guide portion toward the workpiece regulating portion while rotating around the central axis. At this time, the workpiece restricting portion is configured such that each of n-sides of the through hole when the midpoint of the line segment on the front end side among the line segments surrounding each restricting surface and the posture of the workpiece becomes the predetermined posture It may be formed so that the midpoint of the. If it carries out like this, since each edge | side of a control surface will correspond with each edge | side of a passage hole, a workpiece | work will rotate more smoothly.

  In the pilot of the present invention, the work guide portion is an inclined surface that is inclined so that a surface including the two guide lines standing from both ends of the same line segment approaches the central axis of the work guide portion toward the tip. The surface adjacent to the inclined surface including the two guide lines may be formed as a surface parallel to the passing direction. In this way, a larger rotational moment can be applied.

  In the pilot of the present invention, the work restricting portion has a length of a line segment that comes into contact with each n-side of the passage hole of the work as the work that has passed through the work guide further advances along the passing direction. You may have a gradually changing part which becomes long gradually. In this way, when the workpiece reaches the tip of the gradually changing portion, the gradually changing portion easily enters the passage hole of the workpiece. Also, when the work reaches the end of the gradual change part, rattling due to the clearance (gap) between the work passage hole and the work restricting part is reduced. Can do.

  In the pilot of the present invention, the work restricting portion may have the restricting surface formed on a side surface of a columnar body, and the work guide portion may be provided with the guide line standing at a tip of the columnar body. In this case, the regulation surface can be formed using the side surface of the columnar body, and therefore the regulation surface can be formed relatively easily.

  In the pilot of the present invention, the workpiece restricting portion is formed in a shape in which each corner of the columnar body having a cross section perpendicular to the longitudinal direction is chamfered, and side surfaces and chamfer surfaces adjacent to the side surfaces are alternately formed. The regulation surface may be formed on the side surface of the formed columnar body, and the guide may be erected from the apex formed by the side surface and the chamfered surface toward the tip of the work guide portion. In this way, the guideline can be formed relatively easily because the guideline can be formed using the apex formed by the side surface and the chamfered surface of the columnar body.

  In the pilot of the present invention having the gradual change portion, the work restricting portion is formed in a shape in which each corner of the columnar body having a cross section perpendicular to the longitudinal direction is chamfered and is chamfered on the side surface and the side surface. The regulation surface is formed on the side surface of the columnar body in which the adjacent chamfered surfaces are alternately formed, and the tapered surface is adjacent to the regulation surface and the chamfered surface and is inclined so as to approach the central axis of the work guide portion. The gradually changing portion may be formed by a ridge line. In this way, the gradually changing portion can be formed relatively easily using the ridgeline of the tapered surface.

  In the pilot of the present invention, the work guide part may be formed such that the guide line is a straight line. In this way, it is easier to form a guideline than a guideline that is a curve.

  In the pilot of the present invention, the work guide portion may be formed so that the guide line has an edge at a portion in contact with the passage hole. In this way, since the guideline contacts each side of the workpiece passage hole at one point of the edge, it is easy to guide the workpiece to the workpiece regulating portion.

  In the pilot of the present invention, the passage hole may be formed in a regular polygon. If it carries out like this, compared with the polygon from which the length of each edge | side differs, it is easy to insert a workpiece | work guide part in the passage hole of the workpiece | work which rotated. At this time, the passage hole may be formed in a square shape. If it carries out like this, a workpiece | work control part and a workpiece | work guide part can be formed comparatively easily.

  The pilot of the present invention may be used in a sequential machining apparatus that determines the posture of a workpiece and moves the workpiece to perform sequential machining. Since the sequential forming apparatus sequentially performs an operation of processing after moving the workpiece, the posture of the workpiece is easily changed, and the significance of applying the present invention is high. Alternatively, the pilot of the present invention may be used in a workpiece alignment apparatus that determines the posture of a workpiece and aligns the workpiece. In the work alignment apparatus, since there is a high demand for downsizing the part for correcting the posture of the work, it is highly meaningful to apply the present invention.

  Next, the best mode for carrying out the present invention will be described using examples.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram showing an outline of the configuration of a press machine 20 for molding metal parts as one embodiment of the present invention, and FIG. 2 is an explanatory diagram of a work 36 in the middle of molding by the press machine 20, FIG. 3 is a perspective view of the rotation correction pilot 40 attached to the upper mold 32e of the press machine 20. FIGS. 4 and 5 are plan views of the rotation correction pilot 40. FIG. 4A is a side view. 4 (b) is a bottom view, FIG. 4 (c) is a cross-sectional view taken along the line AA in FIG. 4 (a), FIG. 5 (a) is a view taken along the line BB in FIG. 4 (b), and FIG. (B) is a bottom view. 4A is a CC view of FIG. 4B.

  The press machine 20 is configured as a transfer-type press apparatus that sequentially performs operations of fixing a plurality of dies corresponding to a plurality of independent processes, clamping the work 36 with a clamp (not shown), transporting, and forming. The press machine 20 is provided with a work space at the center thereof, and a slide 22 that can move up and down by receiving hydraulic pressure (not shown) at the top of the work space, a bolster 24 disposed at the bottom of the work space, Provided on the lower side of the center of the transfer table 26 for transferring the work 36 to each process, upper molds 32a to 32g fixed to the slide 22, lower molds 34a to 34g fixed to the bolster 24, and upper molds 32c to 32f. The rotation correction pilot 40 is provided. In this press machine 20, the upper die 32a and the lower die 34a are used to draw a flat plate into a cup shape having a flange at the opening, and the upper die 32b and the lower die 34b are used to punch out the bottom surface of the work 36. Drilling process (2) for forming the pilot hole 38, flange-up process (3) for raising the flange portion by the upper mold 32c and the lower mold 34c, and a lower step part 36b of the work 36 by the upper mold 32d and the lower mold 34d (FIG. 2) The first tooth profile forming process (4) for forming the first tooth profile in the reference), the second tooth profile forming process (5) for forming the second tooth profile at the same position as the first tooth profile by the upper mold 32e and the lower mold 34e, the upper mold The third tooth profile forming process (6) for forming the third tooth profile at the same position as the second tooth profile by 32f and the lower mold 34f, and the bottom surface of the work 36 is punched into a circle by the upper mold 32g and the lower mold 34g to cut the pilot hole 38. Excision Are set to sequentially performed (7). Here, for the purpose of preventing the workpiece 36 from being cut and preventing the mold from being damaged, the forming force is dispersed by gradually forming a deep tooth profile at the same position over three times. For this reason, in order to accurately form the tooth profile on the work 36, it is necessary to prevent rotational deviation of the work 36 in each process. In the press machine 20 of the present embodiment, the workpiece 36 is set to be clamped with a clamping pressure that does not exceed ± 30 ° when the workpiece 36 moves to the next step. The upper mold 32e will be mainly described below.

  As shown in FIG. 2, the workpiece 36 has an upper step portion 36a formed on an open cylinder, and is connected to the upper step portion 36a and has a smaller diameter than that of the upper step portion 36a. This is a component having a lower step portion 36b and a bottom surface 37 provided at the lower portion of the lower step portion 36b and having a pilot hole 38 at the center thereof. The pilot hole 38 is formed in a square having four rounded corners in order to prevent the center bottom surface of the work 36 from cracking. In addition, in FIG. 2, the thing after a 3rd tooth profile formation process (6) was shown.

  As shown in FIGS. 3 to 5, the rotation correction pilot 40 is a member that is inserted into the pilot hole 38 from the insertion end side thereof to correct the rotational deviation and center deviation of the work 36 and is positioned, and the fixed end side is the upper die 32 e. It is fixed to. The rotation straightening pilot 40 is formed in a shape in which the tip portion of a columnar body having a shape in which each corner in the longitudinal direction of a quadrangular prism having a square section perpendicular to the longitudinal direction that can be inserted into the pilot hole 38 is chamfered is tapered. Has been. The rotation straightening pilot 40 has a gradually changing portion 41b at the tip, and is a side surface of a columnar body. The regulation surface 41 positions the workpiece 36 by contacting any of the square sides of the pilot hole 38, and the regulation surface 41. A chamfered surface 42 as a surface that chamfers the corner of a quadrangular prism, and a slope that is inclined so as to approach the central axis of the columnar body from the tip line 41a on the tip side toward the tip among the line segments surrounding the regulating surface 41 The front surface 43, the front end surface 43 that is an insertion end surface, the R surface 44 that connects the front end surface 43 and the inclined surface 45 with a smooth curved surface, and the front end from a line segment at a predetermined position of the chamfered surface 42 adjacent to the gradual change portion 41b. A tapered surface 47 inclined so as to approach the central axis of the columnar body toward the end to the end of the line 41a, and a parallel formed in a plane parallel to the longitudinal direction from the line segment on the distal end side of the tapered surface 47 to the R surface 44. Surface 46 and slope 45 in contact with the ridge line a and the pilot holes 38 formed by the parallel surface 46 and includes a guide wire 48 for guiding the workpiece 36. As shown in FIG. 4C, the cross section of the rotation correction pilot 40 on the fixed end side is an octagon having a long side that is a line segment of the regulating surface 41 and a short side that is a line segment of the chamfered surface 42. The cross section at the tip line 41a is a regular octagon with one side having a length M (see FIG. 4B).

  When the rotational position of the work 36 reaches a predetermined position by being guided by the guide wire 48, the regulation surface 41 comes into contact with any one of the square sides (four) of the pilot hole 38 and the central axis of the work 36 It is a surface that restricts the rotation of the work 36 around it, and four surfaces having the same number as the sides of the pilot hole 38 are formed in the same shape. The regulation surface 41 has a gradually changing portion 41b in which the length of a line segment that comes into contact with each square side of the pilot hole 38 gradually increases from a predetermined position on the insertion end side to the fixed end side. In addition, when the rotation correction pilot 40 is inserted into the pilot hole 38, the restriction surface 41 includes a center line (a set of side midpoints) of the pilot hole 38 extending in the insertion direction and a restriction surface extending in the insertion direction. The center line 41 (including the midpoint of the tip line 41a) is formed so as to overlap. When the rotation correction pilot 40 is fixed to the upper mold 32e, the restriction surface 41 is parallel to the insertion direction in which the rotation correction pilot 40 is inserted into the pilot hole 38. The chamfered surface 42 is a surface formed in a rectangular shape as a starting point of the guide wire 48, and functions as a rounded corner relief portion of the pilot hole 38 when inserted into the pilot hole 38. The chamfered surface 42 is formed with the same number of four surfaces as the number of corners of the pilot hole 38. The front end surface 43 is formed in a square shape with a corner cut, and as shown in FIG. 4 (c), the vertical and horizontal lengths are sufficiently shorter than the side length L that can be inserted into the pilot hole 38. N is set. For this reason, the front end surface 43 can be inserted into the pilot hole 38 regardless of the rotational position of the workpiece 36. The vertical and horizontal lengths of the pilot holes 38 are lengths obtained by adding a predetermined clearance length (for example, several μm) to the length L. The tapered surface 47 is formed in a quadrangular shape that becomes wider toward the insertion end side, and is formed such that its inclination angle is larger than the inclination angle of the inclined surface 45. For this reason, the length of the taper surface 47 in the longitudinal direction is shorter than the length of the inclined surface 45. The parallel surface 46 is formed in a substantially triangular shape that becomes narrower toward the insertion end side, and is parallel to the chamfered surface 42 and inclined by 45 ° with respect to the regulating surface 41 as shown in FIG. Is formed. The guide wires 48 are formed in a straight line, and two guide wires 48 are provided upright from both ends of the tip wire 41a, so that eight guide wires 48 are formed as a whole. The above-described surfaces except for the R surface 44 are all configured by planes, and the ridgelines formed by the respective surfaces are all configured by straight lines. In addition, the eight guide lines 48 erected from both ends of the distal end line 41a correspond to the work guide part of the present invention, and the four restriction surfaces 41 correspond to the work restriction part.

  As described above, the rotation correction pilot 40 has the guide wires 48 standing from the both end portions of the front end line 41a of the regulating surface 41 toward the front end, and is formed by the plurality of standing guide wires 48. The inclined surface 45 and the parallel surface 46 have a shape that tapers from the tip line 41 a of the regulating surface 41 toward the tip. Thus, since the insertion end has a tapered shape, even when the center deviation of the workpiece 36 occurs to some extent, the workpiece is placed on the central axis of the rotation correction pilot 40 due to the inclination of the R surface 44 and the inclined surface 45. It is possible to guide 36 central axes. Moreover, in the rotation correction pilot 40, each guide wire 48 standing from the front end line 41a is erected so that the length and the angle with respect to the passing direction are the same. In other words, the lengths of the guide lines 48 facing each other with respect to the central axis (for example, the guide lines 48a and 48b in FIG. 4B) are the same, and the guide lines 48 are parallel to each other. In the rotation correction pilot 40 of the present embodiment, the tip of the workpiece 36 has a regular octagon shape in which the workpiece 36 rotated 45 ° enters straight as it is, and therefore the rotation of the workpiece 36 placed at a rotation angle other than 45 °. The position can be corrected to a predetermined position. Here, if the rotation angle is less than 45 ° in absolute value, the rotation correction pilot 40 rotates the workpiece 36 toward 0 °. In the press machine 20, the rotation angle of the workpiece 36 as a rotation deviation is 30 ° in absolute value. Therefore, the work 36 can always be guided to a predetermined position. Here, each ridge line (including the guide line 48) formed by the respective surfaces is cut to such an extent that it does not get caught or touched somewhere during the work.

  Next, the operation of the press machine 20 of the present embodiment configured as described above, particularly the operation of positioning the workpiece 36 during press molding will be described. 6A and 6B are explanatory diagrams of the progress of the correction and positioning of the rotational position of the workpiece 36, where FIG. 6A is a diagram at the initial stage of insertion, FIG. 6B is a diagram at an intermediate stage, and FIG. In FIG. 6 and FIG. 11 described later, the pilot hole 38 and the rotation correction pilot 40 are enlarged and displayed with respect to the outer shape of the workpiece 36 for easy understanding. Here, a case where the second tooth forming process (5) is performed by the upper mold 32e and the lower mold 34e will be described. As described above, after the first tooth forming process (4) is performed by the upper mold 32d and the lower mold 34d, the workpiece 36 is clamped by a clamp (not shown) and conveyed to a position directly below the upper mold 32e and directly above the lower mold 34e. Is done. Then, the upper die 32e pressed by hydraulic pressure (not shown) moves toward the lower die 34e. At this time, the work 36 is placed on the transport table 26 in a state in which the work 36 is rotated to some extent from the rotation position fixed in the first tooth forming process and is slightly deviated from the center of the upper mold 32e. As the upper die 32e moves downward, the tip of the rotation correction pilot 40 fixed to the tip of the upper die 32e enters the pilot hole 38. Here, since the rotation correction pilot 40 has a tip surface 43 formed sufficiently smaller than the pilot hole 38, the rotation correction pilot 40 can be inserted into the pilot hole 38 even if the work 36 is displaced in the center or rotationally. it can. Subsequently, when the upper die 32 e is lowered, at least one of the plurality of guide wires 48 comes into contact with any side of the pilot hole 38. Then, a component force that is a part of the pressure pressed by the press machine 20 acts on the contact point (for example, the black circle in the figure) between the guide wire 48 and the pilot hole 38 as a rotational moment. This rotational moment acts in the formation direction of the guide line 48 toward the fixed end (see the arrow in the figure). When the upper die 32e is lowered, the contact point between the guide wire 48 and the pilot hole 38 moves in the direction in which the guide wire 48 is formed toward the fixed end as the work 36 moves. Subsequently, as shown in FIG. 6A, when the two sides of the pilot hole 38 and the two guide lines 48 come into contact with each other, the force acting on the two contact points causes the central axis of the work 36 to rotate. The work 36 is guided by the guide line 48 so as to move in the direction of the central axis 40. When the upper die 32e is further lowered, as shown in FIG. 6 (b), the center axis of the work 36 and the center axis of the rotation correction pilot 40 are substantially overlapped, and the three sides of the pilot hole 38 and the three guide lines. 48 and the force acting on the three contact points rotate the workpiece 36 toward a predetermined position where the restriction surface 41 and one side of the pilot hole 38 should be positioned. Here, the work 36 rotates counterclockwise. Since the pilot hole 38 and the rotation correction pilot 40 have a predetermined clearance, it is considered that the guide wire 48 and the pilot hole 38 do not contact at four points but contact at any three points. Further, when the pilot hole 38 comes into contact with the other four guide wires 48 that are not in contact with each other, the workpiece 36 rotates in the direction opposite to the rotation direction here. At this time, as shown in FIG. 6B, the rotational moment acting on the contact point between the guide wire 48 and the pilot hole 38 is the center axis of the rotation correcting pilot 40 when the pressing force of the press machine 20 is constant. It is considered that the angle θ1 formed by a line segment (dotted line in the figure) connecting the contact point (× in the figure) and the guide line 48 and the guide line 48 is closer to 90 °, the larger. Subsequently, when the upper die 32e is lowered, as shown in FIG. 6C, the sides of the pilot hole 38 and the surfaces of the regulating surface 41 substantially coincide with each other, and then the tip line 41a (see FIG. 4). Enters the pilot hole 38, the workpiece 36 is positioned with its rotational position corrected. When the workpiece 36 reaches the vicinity of the terminal end of the gradual change portion 41b, the rattling caused by the clearance (gap) between the pilot hole 38 and the regulating surface 41 becomes small. When the upper die 32e is further lowered, the upper die 32e and the lower die 34e are strongly pressed against the lower step portion 36b in a state where the workpiece 36 is positioned in a predetermined posture, and the second tooth shape is placed on the first tooth shape. It is formed. Then, the workpiece 36 is conveyed in a state where it is sandwiched between clamps at a position where the third tooth profile forming process (6), which is the next step, is performed, and the rotation correction pilot 40 is inserted into the pilot hole 38 in the same manner as described above. After positioning, the third tooth forming process is performed by the upper die 32f and the lower die 34f.

  According to the rotation correction pilot 40 provided in the upper mold 32 of the press machine 20 of the present embodiment described in detail above, when the guide wire 48 is inserted into the pilot hole 38, the four sides of the pilot hole 38 are At least one of the eight guide wires 48 comes into contact with the guide wire 48, and the contact guide wire 48 gives a rotational moment to the workpiece 36 so that the workpiece 36 rotates about the central axis. The work 36 is guided so that each side of the same coincides with each regulation surface of the regulation surface 41. Then, the regulating surface 41 regulates the rotation of the workpiece 36 and positions the workpiece 36 whose posture is corrected by the guide wire 48. Thus, in the rotation correction pilot 40, the posture of the work 36 can be corrected with a single member that is large enough to be inserted into the pilot hole 38 provided in the center of the work 36. Therefore, it is possible to reduce the size of the workpiece 36 when the posture of the workpiece 36 is corrected.

  Further, since one guide line 48 is provided upright from both ends of each tip line 41a, each side of the pilot hole 38 of the work 36 can be rotated clockwise around the central axis, and counterclockwise. It can also rotate clockwise. Further, since the plurality of guide lines 48 are erected so that the length and the angle with respect to the passing direction are the same, the distance between each guide line 48 and the pilot hole 38 becomes equal, and the work 36 rotates. When moving from the guide line 48 toward the restricting surface 41, it can move straight and smoothly. Furthermore, since the midpoint of the tip end line 41a and the midpoint of each side of the pilot hole 38 when the workpiece 36 is positioned coincide with each other, the workpiece 36 rotates more smoothly. A surface adjacent to the inclined surface 45 including the two guide lines 48 is formed as a parallel surface 46 parallel to the passing direction, and a contact point between the guide line 48 and the pilot hole 38 and the center of the rotation correction pilot 40. Since the angle θ1 formed by the line connecting the axes and the guide line 48 can be brought close to 90 °, a larger rotational moment can be applied. For this reason, the length of the rotation correction pilot 40 in the longitudinal direction can be shortened. Further, since the regulation surface 41 has the gradually changing portion 41b, when the workpiece 36 reaches the tip of the gradually changing portion 41b, the gradually changing portion 41b easily enters the pilot hole 38 of the workpiece 36. However, the rattling caused by the clearance (gap) between the pilot hole 38 of the workpiece 36 and the regulating surface 41 is reduced when the end of the gradually changing portion 41b is reached, and the workpiece 36 is firmly fixed in a predetermined posture. Can do. Furthermore, since the inclination angle of the tapered surface 47 is formed to be larger than the inclination angle of the inclined surface 45, the length in the longitudinal direction can be shortened.

  Further, the regulating surface 41 is a columnar body formed by chamfering each corner of a columnar body having a square cross section perpendicular to the longitudinal direction, and having side surfaces and chamfered surfaces 42 adjacent to the side surfaces alternately formed. Since the guide line 48 is formed on the side surface and is erected from the apex formed by the regulation surface 41 and the chamfered surface 42 toward the tip, the guide line 48 is formed using the apex formed by the side surface of the columnar body and the chamfered surface. 48 can be formed, and the guide wire 48 can be provided relatively easily. Moreover, since the gradual change portion 41b is formed by the ridge line of the tapered surface 47 inclined so as to approach the central axis of the rotation correction pilot 40 in the chamfered surface 42, the gradual change portion 41b can be formed relatively easily. it can. Furthermore, since the guide line 48 is formed as a straight line, the guide line 48 can be formed more easily than when the guide line 48 is a curve. Since the pilot hole 38 is formed in a square shape, it is easier to insert the guide wire 48 into the pilot hole 38 of the workpiece 36 that has been rotated than in the case of a polygon having different lengths on each side. Since the surface 41, the chamfered surface 42, the inclined surface 45, the parallel surface 46, the tapered surface 47, etc. are easily formed by cutting or the like, the guide wire 48 can be formed relatively easily. In addition, the transfer type press device 20 that positions the workpiece 36 and sequentially forms the workpiece 36 sequentially performs the operations of conveying and forming the workpiece. Therefore, it is highly significant to apply the present invention to this device.

  In addition, this invention is not limited to the Example mentioned above at all, and as long as it belongs to the technical scope of this invention, it cannot be overemphasized that it can implement with a various aspect.

  For example, in the above-described embodiment, the parallel surface 46 and the tapered surface 47 are provided, and the regulation surface 41 has the gradually changing portion 41b. However, like the rotation correction pilot 50 shown in FIG. It is good also as what does not provide the taper surface 47 and the gradual change part 41b. FIG. 7 is a plan view of the rotation correction pilot 50, where (a) is a side view, (b) is a bottom view at (a), (c) is another side view, and (d) is at (c). The bottom view of (a) is AA sectional drawing of (a). Specifically, the rotation correction pilot 50 is a side surface of a columnar body, and is formed as a surface parallel to the longitudinal direction. The rotation correction pilot 50 is in contact with any one of the square sides of the pilot hole 38 to position the workpiece 36. The chamfered surface 52 is formed as a surface that is adjacent to the regulating surface 51 and is parallel to the longitudinal direction, and chamfers the corners of the quadrangular prism, and from the tip line 51a on the tip side of the line segment surrounding the regulating surface 51 toward the tip. An inclined surface 55 that is inclined so as to approach the central axis of the rotation correction pilot 50, a distal end surface 53 that is an insertion end surface, an R surface 54 that connects the distal end surface 53 and the inclined surface 55 with a smooth curved surface, and an inclined surface 55 And a guide line 58 that is in contact with the pilot hole 38 and guides the workpiece 36. The cross section on the fixed end side of the rotation correction pilot 50 is a regular octagon with one side having a length M (see FIG. 7C). For this reason, the rotation correction pilot 50 can be inserted into the workpiece 36 rotated by 45 °, and the chamfered surface 52 functions as the regulating surface 51 at this time. Since the guide wire 58 has the same configuration as the guide wire 48, the operation when the rotation correction pilot 50 is inserted into the workpiece 36 is the same as that described above (see FIG. 6). Even in this case, it is possible to reduce the size of the workpiece 36 when the posture of the workpiece 36 is corrected. In this rotation correction pilot 50, since the width of the regulating surface 51 in contact with the pilot hole 38 is a length M shorter than the length N, the rattling at the time of positioning is larger than that of the rotation correction pilot 40. (See FIG. 4 (b)).

  In the above-described embodiment, the parallel surface 46 parallel to the longitudinal direction is provided on the insertion end side where the guide wire 48 is formed. However, like the rotation correction pilot 60 shown in FIG. It may be tapered. 8A and 8B are plan views of the rotation correction pilot 60, in which FIG. 9A is a side view, FIG. 8B is a bottom view, and FIG. It is explanatory drawing of progress of correction | amendment of a rotational position, and positioning, (a) is a figure of the insertion initial stage, (b) is a figure of an intermediate | middle stage, (c) is a figure just before positioning. The rotation correction pilot 60 is formed in a shape in which the entire tip end portion of a columnar body having a shape in which each corner in the longitudinal direction of a quadrangular column having a square section perpendicular to the longitudinal direction is chamfered is tapered. The rotation straightening pilot 60 is a side surface of a columnar body and is in contact with any one of the square sides of the pilot hole 38 to position the work 36, and a corner of a rectangular column adjacent to the regulation surface 61 is chamfered. A chamfered surface 62 as a curved surface, an inclined surface 65 inclined so as to approach the central axis of the rotation correction pilot 60 from the distal end line 61a of the line segment surrounding the regulating surface 61 toward the distal end, and an insertion end surface A tip surface 63, an R surface 64 that connects the tip surface 63 and the inclined surface 65 with a smooth curved surface, and a tapered surface that is adjacent to the inclined surface 65 and is inclined so as to connect the chamfered surface 62 and the tip surface 63. 67, and a ridge line formed by the inclined surface 65 and the tapered surface 67, and a guide line 68 that guides the workpiece 36 in contact with the pilot hole 38. When the rotation correction pilot 60 is inserted into the pilot hole 38, the center axis of the workpiece 36 and the center axis of the rotation correction pilot 60 are substantially overlapped as shown in FIG. The three sides and the three guide lines 68 come into contact with each other, and the work 36 is positioned at a predetermined position where the side of the regulation surface 61 and the pilot hole 38 coincides with each other by the force acting on the three contact points. Rotate towards At this time, the angle θ2 formed by the guide line 68 and the line connecting the central axis (× in the figure) of the rotation correction pilot 60 and the contact point is determined by the inclined surface 65 and the tapered surface 67 including the guide line 68 as a ridgeline. Since it is inclined with respect to the insertion direction, the angle is larger than the aforementioned angle θ1. Subsequently, when the rotation correction pilot 60 is inserted into the pilot hole 38, as shown in FIG. 9B, the workpiece 36 rotates, and when the rotation correction pilot 60 is further inserted into the pilot hole 38, FIG. As shown in (c), each side of the pilot hole 38 and each surface of the regulating surface 61 are substantially coincident with each other. After that, when the tip line 61a (see FIG. 8) enters the pilot hole 38, the workpiece 36 is , Positioning is performed with the rotational position corrected. Even in this case, it is possible to reduce the size of the workpiece 36 when the posture of the workpiece 36 is corrected. In the rotation correction pilot 60, the rotational moment acting on the contact point between the guide wire 68 and the pilot hole 38 is smaller than that of the rotation correction pilot 40.

  In the embodiment described above, the pilot hole 38 has a square shape and the rotation correction pilot 40 has a shape that can be inserted into the pilot hole 38. However, as shown in FIG. The rotation correction pilot 70 may be inserted into the pilot hole 138. FIG. 10 is a plan view of the rotation correction pilot 70, where (a) is a side view, (b) and (d) are bottom views, and (c) is a side view seen from another direction of (a). 11A and 11B are explanatory diagrams of the progress of the correction and positioning of the rotational position of the workpiece 136, where FIG. 11A is a diagram at the initial stage of insertion, FIG. 11B is a diagram at an intermediate stage, and FIG. The rotation correction pilot 70 is formed in a shape in which a tip portion of a columnar body having a shape in which each corner in a longitudinal direction of a triangular prism whose section perpendicular to the longitudinal direction is a regular triangle is chamfered is tapered. The rotation correction pilot 70 is a side surface of a columnar body and is formed as a surface parallel to the longitudinal direction. The regulation surface 71 contacts the any one of the sides of the equilateral triangle of the pilot hole 138 and positions the workpiece 136. A chamfered surface 72 that is formed as a surface adjacent to 71 and parallel to the longitudinal direction and chamfers the corners of the triangular prism, and a rotation correction pilot from the front end line 71a on the front end side of the line segment surrounding the regulating surface 71 toward the front end. 70 is a ridge line formed by an inclined surface 75 inclined so as to approach the central axis of 70, a distal end surface 73 that is an insertion end surface, and the inclined surface 75 and the chamfered surface 72, and is a guide line that contacts the pilot hole 138 and guides the workpiece 136. 78. The cross section on the fixed end side of the rotation correction pilot 70 is a regular hexagon. For this reason, the rotation correction pilot 70 can be inserted into the workpiece 136 rotated by 60 °, and the chamfered surface 72 functions as the regulating surface 71 at this time. When the rotation correction pilot 70 is inserted into the pilot hole 138, the center axis of the workpiece 136 and the center axis of the rotation correction pilot 70 are substantially overlapped as shown in FIG. The three sides and the three guide lines 78 are in contact with each other, and the force acting on the three contact points causes the workpiece 136 to be positioned at a position where the regulating surface 71 and any side of the pilot hole 138 coincide with each other. Rotate towards At this time, the angle θ3 formed by the guide line 78 and the line connecting the central axis (× in the drawing) of the rotation correction pilot 70 and the contact point is such that the chamfered surface 72 including the guide line 78 as a ridge line is in the insertion direction. Since it is parallel, the angle is close to 90 °. Subsequently, when the rotation correction pilot 70 is inserted into the pilot hole 138, as shown in FIG. 11B, the workpiece 136 rotates, and when the rotation correction pilot 70 is further inserted into the pilot hole 138, FIG. As shown in (c), each side of the pilot hole 138 and each surface of the regulating surface 71 are substantially coincident with each other, and thereafter, when the tip line 71a (see FIG. 10) enters the pilot hole 138, the workpiece 136 is , Positioning is performed with the rotational position corrected. Even in this case, it is possible to reduce the size of the workpiece 136 when the posture of the workpiece 136 is corrected. In this rotation correction pilot 70, since the workpiece 136 rotated by 60 ° enters the pilot hole 138 as it is, the rotation deviation of the workpiece 136 can be corrected at an angle other than 60 °. For this reason, the correction range of rotation deviation is larger than that of the rotation correction pilot 40 (45 °) that can be inserted into the square hole. In this rotation correction pilot 70, the cross section on the fixed end side is a regular hexagon, but the cross section has a hexagonal shape having a long side that is a line segment of the regulating surface 71 and a short side that is a line segment of the chamfered surface 72. The taper surface, the parallel surface, and the gradually changing portion described above may be provided. In this way, the rattling at the time of positioning the workpiece 136 can be reduced by increasing the width of the regulating surface 71.

  Alternatively, a pilot hole 138 having a regular triangle shape and a rotation correction pilot 80 having a shape that can be inserted into the pilot hole 138 and tapered from a predetermined position as shown in FIG. FIG. 12 is a plan view of the rotation correction pilot 80, where (a) is a side view, (b) and (d) are bottom views, and (c) is a side view seen from another direction of (a), FIGS. 13A and 13B are explanatory diagrams of the progress of correction and positioning of the rotational position of the workpiece 136, where FIG. 13A is a diagram at the initial stage of insertion, FIG. 13B is a diagram at an intermediate stage, and FIG. The rotation correction pilot 80 is formed in a shape in which the entire tip end portion of a columnar body having a shape obtained by chamfering each corner in the longitudinal direction of a triangular prism whose section perpendicular to the longitudinal direction is a regular triangle is tapered. The rotation straightening pilot 80 is a side surface of a columnar body and is formed as a surface parallel to the longitudinal direction, and a regulation surface 81 that contacts each of the sides of the equilateral triangle of the pilot hole 138 and positions the workpiece 136. A chamfered surface 82 that is formed as a surface that is adjacent to 81 and is parallel to the longitudinal direction and chamfers the corners of the triangular prism, and a rotation correction pilot from the front end line 81a to the front end of the line segment surrounding the regulating surface 81 An inclined surface 85 inclined so as to approach the central axis 80, a distal end surface 83 serving as an insertion end surface, and a tapered surface 87 formed to be inclined so as to connect the chamfered surface 82 and the distal end surface 83 adjacent to the inclined surface 85. And a guide line 88 that is a ridge line formed by the inclined surface 85 and the tapered surface 87 and that guides the workpiece 136 in contact with the pilot hole 138. The cross section of the rotation correction pilot 80 on the fixed end side is a regular hexagon. For this reason, the rotation correction pilot 80 can be inserted into the workpiece 136 rotated by 60 °, and the chamfered surface 82 functions as the regulating surface 81 at this time. When the rotation correction pilot 80 is inserted into the pilot hole 138, the center axis of the work 136 and the center axis of the rotation correction pilot 80 are substantially overlapped as shown in FIG. The three sides and the three guide lines 88 are in contact with each other, and the force acting on the three contact points causes the workpiece 136 to be positioned at a position where the side of the regulation surface 81 and one of the pilot holes 138 coincide. Rotate towards At this time, an angle θ4 formed by a line segment connecting the central axis (× in the drawing) of the rotation correction pilot 80 and the contact point and the guide line 88 is such that the inclined surface 85 including the guide line 88 as a ridge line and the tapered surface 87 are included. Since it is inclined with respect to the insertion direction, the angle is larger than the angle θ3 described above. Subsequently, when the rotation correction pilot 80 is inserted into the pilot hole 138, as shown in FIG. 13B, the workpiece 136 rotates, and when the rotation correction pilot 80 is further inserted into the pilot hole 138, FIG. As shown in (c), each side of the pilot hole 138 and each surface of the regulating surface 81 substantially coincide with each other, and thereafter, when the tip line 81a (see FIG. 12) enters the pilot hole 138, the workpiece 136 is , Positioning is performed with the rotational position corrected. Even in this case, it is possible to reduce the size of the workpiece 136 when the posture of the workpiece 136 is corrected. The rotation correction pilot 80 has a regular hexagonal shape in which the work 136 rotated by 60 ° is straightly entered, so that the rotation position of the work 136 placed at a rotation angle other than 60 ° can be corrected to a predetermined position. It has become. For this reason, the correction range of rotation deviation is larger than that of the rotation correction pilot 40 (45 °) that can be inserted into the square hole. In this rotation correction pilot 80, the cross section on the fixed end side is a regular hexagon, but the width of the chamfered surface 82 may be reduced and the width of the regulating surface 81 may be increased. In this way, the rattling at the time of positioning the workpiece 136 can be reduced by increasing the width of the regulating surface 81. In the rotation correction pilot 80, the rotation moment acting on the contact point between the guide wire 88 and the pilot hole 138 is smaller than that of the rotation correction pilot 70.

  In the above-described embodiment, the square pilot hole 38 having the same side length and the rotation correcting pilot 40 that can be inserted into the square hole are used. However, each side may have a different polygon, It is good also as a polygon (for example, parallelogram etc.) with equal length of a side. In order to rotate the workpiece 36 smoothly, it is preferably a regular polygon.

  In the above-described embodiment, the pilot hole 38 that is a through hole is provided in the work 36, but it may be any shape as long as the rotation correction pilot 40 is inserted and fitted, for example, a bottomed hole that does not penetrate the work 36. It may be provided. Although the pilot hole 38 is provided at the center of the bottom surface 37, the pilot hole 38 may be provided at a place where the workpiece 36 can be positioned at a predetermined position by being rotationally moved by the rotation correcting pilot 40. It doesn't matter.

  In the above-described embodiment, the guide line 48 is formed using the ridge line formed by the surfaces of the columnar body. However, a rod-shaped body serving as a guide line may be provided on the tip surface of the columnar body. However, only the guide frame as the guide line 48 may be used. In addition, although the regulation surface 41 is formed using the surface of the columnar body, only the regulation frame surrounding the regulation surface may be used. Even in this case, it is possible to reduce the size of the workpiece 36 when the posture of the workpiece 36 is corrected.

  In the embodiment described above, the chamfered surface 42 is formed, but this may be omitted. At this time, the guide wire 48 may be erected from two predetermined positions of the distal end line 41a.

  In the embodiment described above, the guide line 48 is formed as a straight line, but may be formed as a curve. Moreover, although the ridgeline of each plane shall intersect with a straight line, it is good also as what connects smoothly with a curve. In the above-described embodiment, the chamfered surface 42, the tip surface 43, the inclined surface 45, the parallel surface 46, and the tapered surface 47 are flat surfaces, but some or all of them may be formed as curved surfaces.

  In the embodiment described above, the guide line 48 that is a ridge line between adjacent surfaces is cut, but an edge may be raised without being cut. In this way, the guide wire 48 comes into contact with the pilot hole 38 at a single point, so that the workpiece 36 can be easily guided to the regulation surface 41.

  In the above-described embodiment, the rotation correction pilot 40 is applied to the transfer type press device 20 that positions the workpiece 36 and sequentially forms the workpiece 36. However, any device that positions and processes the workpiece 36 may be used. If it does not specifically limit, the rotation correction pilot 40 can be applied.

  In the embodiment described above, the rotation correction pilot 40 is applied to the transfer type press device 20 that positions the workpiece 36 and sequentially forms the workpiece 36. However, as shown in FIG. The rotation correction pilot 40 may be applied to the work aligning device 90 that performs the work 36 alignment. FIG. 14 is an explanatory diagram of the workpiece alignment device 90. Specifically, the workpiece alignment device 90 includes a workpiece mounting table 92 on which a workpiece is mounted, and a rotation correction pilot 40 that is fixed to the center of the workpiece mounting table 92 with its insertion end facing upward. And. Then, the workpiece 96 provided with a pilot hole 98 which is a disc shape and has a through hole into which the rotation correction pilot 40 can be inserted at the center is sequentially inserted into the rotation correction pilot 40. Then, the work 96 is guided by the guide wire 48 to rotate, and the work 96 is placed on the work placing base 92 in a state where the rotation is restricted by the restriction surface 41 and positioned at a predetermined rotational position. After aligning the work 96, the rotation correction pilot 40 is pulled out, and the aligned work 96 is taken out. Thus, in the workpiece alignment apparatus 90, since the request | requirement which aims at the compactization of the part which corrects the attitude | position of a workpiece | work is high, the significance which applies the rotation correction pilot 40 is high. In addition, as described above, the rotation correction pilot 40 can be applied as long as it is a device that aligns the rotation position of the workpiece 36 with a predetermined position.

It is a block diagram which shows the outline of a structure of the press 20 which shape | molds the metal component as one Example of this invention. It is explanatory drawing of the workpiece | work 36 in the middle of shaping | molding by the press machine. It is a perspective view of the rotation correction pilot 40 attached to the upper mold | type 32e of the press machine 20. FIG. It is a top view of the rotation correction pilot 40, (a) is a side view, (b) is a bottom view, (c) is AA sectional drawing of (a). It is a top view of the rotation correction pilot 40, (a) is a BB view of FIG.4 (b), (b) is a bottom view. It is explanatory drawing of progress of correction | amendment and positioning of the rotational position of the workpiece | work 36, (a) is a figure of the insertion initial stage, (b) is a figure of an intermediate | middle stage, (c) is a figure just before positioning. It is a top view of rotation correction pilot 50, (a) is a side view, (b) is a bottom view in (a), (c) is another side view, (d) is a bottom view in (c), (E) is AA sectional drawing of (a). It is a top view of the rotation correction pilot 60, (a) is a side view, (b) is a bottom view, (c) is AA sectional drawing of (a). It is explanatory drawing of progress of correction | amendment and positioning of the rotational position of the workpiece | work 36, (a) is a figure of the insertion initial stage, (b) is a figure of an intermediate | middle stage, (c) is a figure just before positioning. It is a top view of the rotation correction pilot 70, (a) is a side view, (b), (d) is a bottom view, (c) is a side view seen from another direction of (a). It is explanatory drawing of progress of correction | amendment and positioning of the rotational position of the workpiece | work 136, (a) is a figure of the insertion initial stage, (b) is a figure of an intermediate | middle stage, (c) is a figure just before positioning. It is a top view of the rotation correction pilot 80, (a) is a side view, (b), (d) is a bottom view, (c) is a side view seen from another direction of (a). It is explanatory drawing of progress of correction | amendment and positioning of the rotational position of the workpiece | work 136, (a) is a figure of the insertion initial stage, (b) is a figure of an intermediate | middle stage, (c) is a figure just before positioning. It is explanatory drawing of the workpiece alignment apparatus.

Explanation of symbols

20 press machine, 22 slide, 24 bolster, 26 carrier, 32a to 32g upper mold, 34a to 34g lower mold, 36 workpiece, 36a upper stage, 36b lower stage, 37 bottom, 38 pilot hole, 40, 50, 60, 70, 80 Rotation correction pilot, 41, 51, 61, 71, 81 Restricting surface, 41a, 51a, 61a, 71a, 81a Tip line, 41b Gradual change portion, 42, 52, 62, 72, 82 Chamfered surface, 43, 53, 63, 73, 83 Tip surface, 44, 54, 64 R surface, 45, 55, 65, 75, 85 Inclined surface, 46 Parallel surface, 47, 67, 87 Tapered surface, 48, 48a, 48b, 58, 68, 78, 88 Guide wire, 90 Work alignment device, 92 Workpiece mounting table, 96 Workpiece, 98 Pilot hole, 136 Workpiece, 138 Pilot .

Claims (15)

A pilot for guiding the posture of the workpiece to a predetermined posture by passing through an n-shaped (n is an integer of 3 or more) passage hole provided in the workpiece;
It is formed in a size that allows the passage hole of the workpiece to pass in a predetermined passage direction, has n restriction surfaces that can contact each side of the n-gon of the passage hole and is parallel to the passage direction, A workpiece regulation that regulates rotation of the workpiece around the central axis of the passage hole when the regulation surface comes into contact with each n-side of the passage hole when the posture of the workpiece becomes the predetermined posture. And
A skeleton formed by a plurality of the erected guide lines has guide lines erected from a predetermined position on the front end side of the line segments enclosing each control surface of the work restricting portion toward the front end. A work guide part that exhibits a shape that tapers from the work restriction part toward the tip;
With
When the workpiece is relatively moved such that the passage hole of the workpiece passes from the workpiece guide portion to the workpiece regulating portion, at least one side of n sides of the n-sided shape of the passage hole is the plurality of the plurality. Each of the n-sides of the through hole is in contact with each of the work restricting portions by applying a rotational moment so that the contacted guideline is in contact with any of the guideline and the work rotates about the central axis. Guide the workpiece to match the regulatory aspects,
pilot.   2. The pilot according to claim 1, wherein the work guide unit is erected from both ends of a line segment on a distal end side among line segments in which the plurality of guide lines surround each regulation surface of the work regulation unit.   3. The pilot according to claim 1, wherein the workpiece guide unit is erected such that the plurality of guide lines have the same length and angle with respect to the passing direction. 4.   The work restricting portion includes a midpoint of a front end side line segment of line segments surrounding each restricting surface and a midpoint of each side of the n-gonal side of the passage hole when the posture of the work becomes the predetermined posture. The pilot according to claim 3, wherein   The workpiece guide portion is formed as an inclined surface that is inclined so that a surface including the two guide lines standing from both ends of the same line segment approaches the central axis of the workpiece guide portion toward the tip. The pilot according to claim 2, wherein a plane adjacent to the inclined surface including the guide line is formed as a plane parallel to the passing direction.   The workpiece restricting portion gradually changes so that the length of a line segment that contacts each n-side of the passage hole of the workpiece gradually increases as the workpiece that has passed through the workpiece guiding portion further travels along the passing direction. The pilot according to claim 1, which has a portion. The work restricting portion has the restricting surface formed on a side surface of the columnar body,
The work guide part has the guideline erected at the end of the columnar body,
The pilot according to claim 1. The workpiece restricting portion is formed of a columnar body in which a cross section perpendicular to a longitudinal direction is chamfered at each corner of the columnar body, and side surfaces and chamfered surfaces adjacent to the side surfaces are alternately formed. The regulation surface is formed on the side surface,
The work guide part has the guideline standing from the apex formed by the side surface and the chamfered surface toward the tip.
The pilot according to claim 1.   The workpiece restricting portion is formed of a columnar body in which a cross section perpendicular to a longitudinal direction is chamfered at each corner of the columnar body, and side surfaces and chamfered surfaces adjacent to the side surfaces are alternately formed. The regulation surface is formed on the side surface, and the gradually changing portion is formed by a ridge line of a tapered surface that is adjacent to the regulation surface and the chamfered surface and is inclined so as to approach the central axis of the work guide portion. Item 7. The pilot according to item 6. The work guide part is formed with the guide line in a straight line,
The pilot according to claim 1.   The pilot according to any one of claims 1 to 10, wherein the work guide portion is formed so that the guide line has an edge at a portion in contact with the passage hole.   The pilot according to any one of claims 1 to 11, wherein the passage hole is formed in a regular polygon.   The pilot according to claim 12, wherein the passage hole is formed in a square shape.   The pilot according to any one of claims 1 to 13, which is used in a sequential processing apparatus that determines a posture of a workpiece and performs sequential processing by moving the workpiece.   The pilot according to claim 1, wherein the pilot is used in a workpiece alignment device that determines a posture of a workpiece and aligns the workpiece.

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