JP6013072B2 - Wire bending method and apparatus - Google Patents

Description

  The present invention relates to a wire bending method and apparatus.

  Examples of wire bending work were as follows when the applicant filed earlier and obtained a patent. (Patent Document 1) That is, a rod-shaped mandrel that passes through and guides the tip portion of the wire and extends in the orthogonal direction with respect to the front surface of the head body, and passes through the mandrel as a center, in a recess of the head body, and A disc-shaped bending sleeve rotatably fitted around the mandrel, a bending projection protruding from the outer surface of the bending sleeve, and means for integrally moving the bending sleeve and the mandrel forward and backward. . Further, on the end surface exposed on the front surface of the head body of the mandrel, a guide groove along the diameter and a guide surface along the circumferential direction are continuously provided at the other end in front of the wire feeding direction of the guide groove. It is formed. A nose portion that determines the minimum bending radius of the wire is formed at the boundary portion of the guide surface with respect to these guide grooves. Then, the wire is fed out from the guide groove of the mandrel, the bending sleeve is rotated, and the bending projection is pushed and bent.

Japanese Patent No. 4554781

However, zigzag bending work was not possible with this device.
That is, it passes through the guide groove of the mandrel, protrudes by L1 from the mandrel outlet, stops the feeding of the wire, rotates the bending sleeve by the angle G1, and pushes and bends the wire at the bending convex portion. Next, the bending sleeve is retracted, the wire is placed by L2, the bending sleeve is advanced, the bending sleeve is reversed by an angle G2, and the wire is pushed and bent at the bending convex portion. Since such a process is repeated, bending accuracy cannot be obtained in the latter half of the bending.

  An object of the present invention is to solve the above-mentioned problems and to provide a wire bending method and apparatus capable of a zigzag bending operation with excellent bending accuracy.

In the wire bending method of the first solving means of the present invention, a shift stand is installed in a case so as to be movable in a direction perpendicular to the wire feed direction, and a swivel receiving tube is installed on the shift stand. A hollow bending swivel shaft is rotatably mounted to form a pin base rotation portion, and two bending pins are erected, and the pin base is indirectly bent with respect to the upper end of the bending swivel shaft. Hold the slidably on the diameter of the swivel shaft, slide the shift table and set one of the pins as the bending center, the other pin as the bending pin, and send it between the two bending pins. A wire bending method in which the bent wire is bent with the other pin by turning the bending swivel axis around one of the pins, and an upper shift rack is fixed to the lower surface of the pin base, Directly below the upper shift rack with a gap, Established the track vertically movably, between the lower shift rack and the upper shift rack, so that can move in horizontal direction perpendicular to the wire feed direction, and placing the shift stage to the case, the upper An upper large tooth meshing with the shift rack, and a lower large tooth meshing with the upper large tooth and meshing with the lower shift rack are rotatably installed inside the bending swivel shaft, and the upper large teeth and the That is , one of the lower large teeth is rotated.

In the wire bending apparatus according to the second solving means of the present invention, two bending pins are erected on a pin base, and the wire sent between the two bending pins is fed around one of the pins as the other. A wire bending portion in which the pin base is held so as to be rotatable around the central axis of the pin so as to be bent by a pin, an upper shift rack fixed to the lower surface of the pin base, and the upper shift rack And a lower shift rack installed on the lower wall of the case so as to be able to be raised and lowered, and can be moved in a direction perpendicular to the wire feed direction between the upper shift rack and the lower shift rack. And a pin table rotating part having a hollow bending swivel shaft rotatably mounted on the inside of the swivel receiving tube installed on the shift table, An annular passive gear fixed concentrically to the lower end of the bending swivel axis And flexural driver so ya is driven by a servomotor, a large tooth on which meshes on said shift rack meshes with the upper large teeth, and a lower large teeth meshing with the lower shift rack, the bend And a shift drive unit that is rotatably installed inside the swivel shaft and that rotates either the upper large teeth or the lower large teeth .

The wire bending device of the third solving means of the present invention is a middle tooth fixed concentrically on either side of the upper large tooth or the lower large tooth in the shift drive unit in addition to the device of the second solving means. A lifting rack that meshes with the middle teeth, a shift sleeve that is fixed to the lifting rack and is slidably fitted to the outside of the bending swivel shaft , and a sleeve lifting part that lifts and lowers the shift sleeve Is included.

The wire bending device of the fourth solving means of the present invention includes, in addition to the device of the third solving means, a sliding piece that is slidably engaged with a circumferential groove provided in the shift sleeve in the sleeve elevating part. The lever is pin-coupled at the tip, the other end is pin-coupled to the connecting shaft, and is supported by the lever shaft in a swingable manner in the middle, and an intermediate member slidably penetrating the connecting shaft, The shift drive shaft is connected.

The wire bending device of the fifth solving means of the present invention, in addition to the device of any one of the second , third and fourth solving means, in the wire bending portion, the pin base has an upper portion having a pin hole, It has a rack groove at the lower end and a lower part having a side slide guide.

The wire bending device of the sixth solving means of the present invention is the device of any one of the second , third , fourth and fifth solving means, and in the pin table rotating portion, the bending swivel axis is: A hollow cylindrical body, a flange fixed to the upper end of the cylindrical body, and a slide guide coupled to the upper surface of the flange.

  According to the present invention, a zigzag bending operation with excellent bending accuracy is possible.

It is a top view of this invention apparatus. It is this invention apparatus front view. It is a left view of this invention apparatus. It is a top view except the cover of the device of the present invention. FIG. 5 is a perspective view corresponding to FIG. 4. It is X5-X5 sectional drawing of FIG. FIG. 6 is a continuous diagram of FIG. 5. FIG. 6 is a sectional view taken along line Y6-Y6 of FIG. It is Y7-Y7 sectional drawing of FIG. 2 is an exploded perspective view mainly including a wire bending portion 10. FIG. FIG. 6 is an exploded perspective view mainly showing a pin base rotation unit 40. Fig. 4b is a partial schematic diagram of Fig. 4a. 4 is an exploded perspective view of a shift drive unit 60. FIG. It is bending operation explanatory drawing. It is explanatory drawing of a bending wire.

  Embodiments of the present invention will be described below with reference to the drawings. In FIGS. 1, 2, and 3, the wire W is sent from right to left and passes between the two pins 11a and 11b and stops. Then, with these pins, the wire W is bent in a zigzag shape as shown in FIGS. A guide G is mounted on the case 1 via a table T, through which the wire is routed.

In FIGS. 4, 4a, 5, and 6, the outline of the present apparatus is as follows. Two bending pins 11 are erected on the pin base 12, and a wire bending portion 10 is configured in which the pin base is held by the pin base rotating portion 40 so that the pin base can be rotated around the central axis of the pin. The
The upper shift rack 21 is fixed to the lower surface of the pin base 12, and the lower shift rack 22 is installed on the lower wall of the case 1 so as to be movable up and down immediately below the upper shift rack.

4a, 5 and 10, the shift table 30 is suspended from the fixed base 2 so that it is deviated upstream with respect to the wire feed direction between the upper and lower shift racks and is movable in the horizontal right-angle direction. . Inside the swivel receiving tube 41 installed on the shift table, a pin table rotating unit 40 having a hollow bending swivel shaft 42 mounted rotatably is configured. The bending drive section 50, the annular driven gear 51 fixed coaxially to the lower end of the bending pivot 42 intermediate gear 52, the bending drive unit 50 to be driven by a servo motor 54 via the drive gear 53 is configured Is done.

  In FIGS. 6 and 9, the bending turning shaft 42 is formed by joining the two parts divided by the plane including the axis center line, and a window 42d is provided in a part of the joining surface. Then, inside the bending swivel shaft 42, an upper large tooth 61 that meshes with the upper shift rack 21, a lower large tooth 62 that meshes with the upper large tooth and meshes with the lower shift rack 22, and the upper large tooth 61. And a shift drive unit 60 having a middle tooth 63 concentrically fixed on the side surface and rotating the upper large tooth. Here, the upper large teeth 61 and the lower large teeth 62 have a saddle shape that is axisymmetrically cut off by parallel chords on both sides across the rotation axis of the spur gear. The upper large teeth 61 and the lower large teeth 62 are rotatably supported by shafts 61a and 62a, respectively.

  4a, 5, 7, and 10, a fixed base 2 having a U-shaped cross section is attached to the upper half portion of the rectangular parallelepiped case 1. FIG. The two rails 2a are fixed to the lower surface of the bottom plate of the fixed base, and the shift base 30 is slidably supported by these. The shift table 30 is configured such that a vertical plate portion 32 is erected on the tip side in the wire feeding direction of a horizontal plate portion 31 that is rectangular in plan view. A slide guide 33 that is received by the rail 2a of the fixed base is attached to the upper surface of the horizontal plate portion.

  5, 6, 10, 11, the wire bending part 10, the upper and lower shift racks 21, 22, the pin base rotating part 40, the bending driving part 50, and the shift driving part 60 are placed on the shift base 30. It moves together with the shift table 30. In the shift drive unit 60, a middle shift rack 64 that meshes with the middle teeth 63, a shift sleeve 65 that is fixed to the middle shift rack and is slidably mounted on the outside of the pivot shaft 42, and the shift And a sleeve raising / lowering portion 66 adapted to raise and lower the sleeve. The middle teeth 63 and the middle shift rack 64 mesh within the window 42d.

  10 and 11, in the sleeve elevating part 66, a sliding piece 66a that is slidably engaged with a circumferential groove 65a provided in the sleeve 65, and a tip end is pin-coupled to the sliding piece, and the other end Has a shift lever 66d swingably supported by a lever shaft 66c (supported by the vertical plate portion 32 of the shift table 30) in the middle, and is slidable on the connection shaft 66b. A shift drive shaft 66f is connected to the penetrating intermediate member 66e. The tip of the lever 66d faces the sliding piece 66a through the window portions 41a provided on both side surfaces of the swivel receiving cylinder 41.

  5, 6 and 8, in the wire bending portion 10, the pin base 12 has an upper portion 12a having a pin hole 12c, a rack groove 12e at the lower end, a laying plate hole 12d on the upper surface, and an inner slide guide 12f on the side surface. And a lower portion 12b. And the bending pin 11 is positioned by the taper sleeve 14 on the laying board 13 interposed in the laying board hole 12d, and is planted in the pin hole 12c in the upper part of the pin base. The upper and lower portions of the pin base 12 are coupled with bolts 15.

  5, 6 and 9, in the pin table rotating portion 40, the bending pivot shaft 42 includes a hollow cylindrical body 42a, a flange 42b fixed to the upper end of the cylindrical body, and a disk cover on the upper surface of the flange. And an inner slide guide 42c coupled via 42b '. The outer slide guide 16 is fixed to the side surface of the inner slide guide 42c with a screw. Then, the turning shaft 42 is supported by the turning receiving cylinder 41 through bearings at the upper and lower ends.

  The operation state will be described next. Before entering the bending operation in FIGS. 1, 5, 5 a, 6, the wire W is kept horizontal and is sent from right to left and passes between the bending pins 11, 11. A straight line k that horizontally connects the central axes of the two bending pins is orthogonal to the horizontal wire feed path m. In this state, a set value is input to the bending servo motor 54 to determine the origin. The vertical turning center line n of the bending turning shaft 42 passes through the center of the two bending pins and is orthogonal to the wire feed path m. This state is determined as the origin by inputting a set value to the shift servomotor 66m (FIG. 5a).

  Now, the lower (right side in FIG. 6) and upper (left side in FIG. 6) pins in FIG. 1 are referred to as right bending pin 11a and left bending pin 11b, respectively. Then, the right bending pin 11a is determined as the bending center axis, and setting values are given to the bending servo motor 54 and the shift servo motor 66m (FIG. 5a) of the bending drive unit. That is, the wire diameter, the bending pin diameter, the wire feed amount, the number of times of bending, and the initial bending direction are input.

  Thereby, the turning center axis n of the bending turning shaft 42 is made to coincide with the axis a of the right bending pin 11a. That is, the lower shift rack 22 is engaged with the lower large teeth 62 by the elevating cylinder 24. Next, when the shift drive shaft 66f is pulled to the right (FIG. 5), the shift lever 66d is rotated clockwise (FIG. 11), the shift sleeve 65 is raised, and the lifting rack 64 is integrally raised. As a result, the upper large tooth 61 rotates to the left and the lower large tooth 62 rotates to the right.

  However, the upper shift rack 21 meshing with these is positioned as described above, and the lower shift rack 22 is in the raised position and is stopped (stopped in movement). Accordingly, the upper and lower large teeth 61 and 62 and the pivot shaft 42 together with the pivot shaft 42 move to the right (FIG. 6) together with the shift base 30, and the pivot center axis n coincides with the center axis a of the right bending pin. Stop.

  Thus, the structure which stops the shift drive shaft 66f is as follows. In FIG. 5a, a feed screw rod 66g is connected to the end of the shift drive shaft 66f, and a nut member 66h engaged therewith is rotatably mounted on the bearing 66i with respect to the case 1. And the passive timing pulley 66j concentrically fixed to the nut member 66h is rotated by the timing belt 66k, and the drive timing pulley 66l is rotated by the shift servo motor 66m. Then, the distance from the path m to the turning center line n is set in the shift servo motor (the origin is when the distance is zero).

  Next, the turning shaft 42 turns to the left (FIG. 4), and the left bending pin 11b bends the wire to the left (FIG. 12). Next, the turning shaft 42 turns to the right (FIG. 4) and returns to the original position. This completes one left bending operation. Next, the wire W is sent.

  This time, the left bending pin 11b is set as the bending center. For this reason, the work reverse to the above is performed, and the turn receiving cylinder 41 is moved to the left (FIG. 6) together with the shift base 30. In the same manner, the bending operation is performed after the swivel receiving tube 41 is alternately moved left and right by the shift base 30. As a result, a zigzag bending work as shown in FIG. 13 can be performed.

  The present invention is not limited to the embodiments and embodiments described above, and includes various modifications without departing from the scope of the claims.

  The present invention is used in a wire bending method and apparatus.

W Wire 1 Case 2 Fixed base 2a Rail 10 Wire bending part 12 Pin base 12a Upper 12b Lower 12c Pin hole 12d Laying plate hole 12e Rack mounting groove 12f Inner slide guide 13 Laying plate 14 Taper sleeve 15 Coupling bolt 16 Outer slide guide 21 Above Shift rack 22 Lower shift rack 23 Rack base 24 Elevating cylinder 30 Shift base 31 Horizontal plate portion 32 Vertical plate portion 33 Slide guide 40 Pin base rotating portion 41 Rotating barrel 41a Window portion 42 Bending and rotating shaft 42a Hollow cylindrical body 42b Flange 42c Inner slide guide 42d Window 50 Bending drive part 51 Passive gear 52 Intermediate gear 53 Drive gear 54 Bending servo motor 60 Shift drive part 61 Upper large teeth 62 Lower large teeth 63 Medium teeth 64 Lifting rack 65 Shift sleeve 65a Circumferential groove 66 Sleeve lifting 66a sliding piece 66b connecting shaft 66c lever shaft 66d shift lever 66e intermediate member 66f shift driving shaft 66g feed screw rod 66h nut member 66i bearing portion 66j driven timing pulley 66k timing belt 66l driving timing pulley 66m shift servo motor

Claims (6)

Install the shift stand in the case so that it can move in the direction perpendicular to the wire feed direction,
A swivel receiving tube is installed on the shift table, and a pin bend rotation unit is configured by rotatably mounting a hollow bending swivel shaft inside the shift table.
Two bending pins are erected to hold the pin base slidably on the bending pivot axis diameter indirectly with respect to the upper end of the bending pivot axis;
By sliding the shift table, one of the pins is the bending center, the other pin is the bending pin, and the wire sent between the two bending pins is centered on one of the pins. , A wire bending method in which the bending turning shaft is rotated and bent with the other pin ,
Fix the upper shift rack to the lower surface of the pin base,
Install the lower shift rack on the lower wall of the case so that it can be raised and lowered directly below the upper shift rack.
Between the upper shift rack and the lower shift rack , the shift stand is installed in the case so as to be movable in a direction perpendicular to the wire feed direction,
An upper large tooth that meshes with the upper shift rack, and a lower large tooth that meshes with the upper large tooth and meshes with the lower shift rack are rotatably installed inside the bending swivel shaft,
One of the upper large teeth and the lower large teeth is rotated.
Two bending pins are erected on the pin base, and the pin base is connected to the pin so that the wire sent between the two bending pins is bent with the other pin around one of the pins. A wire bending portion that is held so as to be rotatable around a central axis;
An upper shift rack fixed to the lower surface of the pin base;
A lower shift rack that is installed directly below the upper shift rack at a distance from the upper shift rack so as to be movable up and down;
Between the upper shift rack and the lower shift rack , it is movable in the direction perpendicular to the wire feeding direction, and a shift base installed in the case;
A pin table rotation part having a hollow bending rotation axis that is rotatably mounted inside a rotation receiving cylinder installed on the shift table;
A bending drive unit in which an annular passive gear fixed concentrically to the lower end of the bending swivel shaft is driven by a servo motor;
An upper large tooth that meshes with the upper shift rack, and a lower large tooth that meshes with the upper large tooth and meshes with the lower shift rack are rotatably installed inside the bending swivel shaft,
A wire bending apparatus comprising: a shift drive unit configured to rotate either the upper large teeth or the lower large teeth .
In the shift drive unit, middle teeth fixed concentrically on either side of the upper large teeth and the lower large teeth ;
A lifting rack meshing with the middle teeth;
3. A wire bending apparatus according to claim 2 , further comprising: a shift sleeve fixed to the lifting rack so as to be slidable up and down on the outer side of the bending swivel shaft ; and a sleeve lifting portion configured to lift and lower the shift sleeve. .
In the sleeve lifting and lowering portion, a sliding piece that is slidably engaged with a circumferential groove provided in the shift sleeve, a tip end is pin-coupled to the sliding piece, and the other end is pin-coupled to a connecting shaft, And a lever that is swingably supported on the lever shaft,
The wire bending apparatus according to claim 3 , wherein a shift drive shaft is connected to an intermediate member that slidably penetrates the connecting shaft.
5. The wire bending apparatus according to claim 2 , wherein the pin base includes an upper portion having a pin hole and a lower portion having a rack groove at a lower end and having a side surface slide guide.
In the pin table rotation part, the bending turning shaft includes a hollow cylindrical body, a flange fixed to an upper end of the cylindrical body, and a slide guide coupled to an upper surface of the flange . The wire bending apparatus of any one of Claims .

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