JP4708540B2 - Shearing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sheet catcher over ring machine, and more particularly, to sheet catcher over ring machine excellent in productivity which can be sheared by suppressing the generation of burrs.
[0002]
[Prior art]
In the shearing machine, for example, the upper blade is moved up and down by a ram with respect to the lower blade fixed to the table, and the workpiece positioned on the lower blade is sheared. If the shearing machine is used to shear the workpiece at once with the upper blade and the lower blade, burrs are likely to occur, and secondary processing for deburring is required.
[0003]
Therefore, conventionally, in order to suppress the generation of burrs, the shearing process is performed in two steps without performing the shearing process at once. For example, as shown in FIGS. 8 and 9, two sets of cutting blades (upper blade 101 and lower blade 107 and upper blade 103 and lower blade 105) are prepared, and the upper blade 103 and the front side on the back side are prepared in the first step. After the workpiece W is cut halfway with the lower blade 105 (half shear), the workpiece W is cut with the upper blade 101 on the front surface and the lower blade 107 on the rear surface in the second step.
[0004]
In this way, after the work W is first cut to the middle of the plate thickness, the work W is completely cut off in the next process, so that the generation of burrs is suppressed compared to the case where the work W is sheared at once. can do.
[0005]
[Problems to be solved by the invention]
However, since the shear angle of the cutting blade cannot be given to the cutting blade in the first step, it is necessary to generate a larger pressing force than the general-purpose shear. Further, in the center of the workpiece W, the clearance is widened, it is difficult to stabilize the cutting quality, and it is difficult to process the wide workpiece W. Furthermore, since the processing step is divided into two steps, the productivity is about half that of the conventional one-time shearing process.
[0006]
The present invention, which was proposed in order to solve the above problems, and an object thereof is to provide a sheet catcher over ring machine excellent in productivity which can be sheared by suppressing the generation of burrs.
[0007]
[Means for Solving the Problems]
The present invention has been made in view of the problems as described above, and has a lower cutting blade support base (9) provided with a pair of linear straight lower blades (1) arranged in parallel to each other while maintaining a predetermined interval; Provided on a ram (31) provided above the lower cutting blade support (9) so as to be movable up and down, and an upper cutting blade support (29) provided on the ram (31), the lower straight blade (1 ) Between the pair of upper straight blades (5) capable of firmly fixing the plate-like workpiece (W) and the lower cutting blade support base (9) in the longitudinal direction of the lower straight blade (1). The lower round blade moving slider (21) provided in the lower round blade holder (17) provided in the lower round blade moving slider (21) is rotatably provided, and the pair of lower straight blades (1 ) Projecting upward from between the lower round blade (7) for half-shearing the workpiece (W) in cooperation with the pair of upper straight blades (5), An upper round blade moving slider (39) provided on the ram (31) so as to be movable in the longitudinal direction of the upper straight blade (5), and an upper round blade provided on the upper round blade moving slider (39) A holder (35) is rotatably provided, projects downward from between the pair of upper straight blades (5), and cooperates with the pair of lower straight blades (1) to place a half shear on the workpiece (W). The upper round blade (3) to perform is provided.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.
[0011]
<Configuration of shearing machine>
As shown mainly in FIGS. 1 and 2, the shearing machine according to the present embodiment includes a pair of lower straight blades 1, 1 that are arranged in parallel and facing each other at a predetermined interval, and a pair of lower straight blades 1. Are provided in a disk-shaped lower round blade 7 that rotates while rotating along the longitudinal direction of the lower straight blade 1, 1 and an upper position opposite to the lower straight blade 1, 1, And a pair of discs that run between the pair of upper straight blades 5, 5 along the longitudinal direction of the upper straight blade 5. The upper round blade 3 is provided.
[0012]
As shown in FIGS. 1 and 2, the pair of lower straight blades 1 and 1 are linear cutting blades, and the opposed surfaces 9a and 9a of the lower cutting blade support bases 9 and 9 arranged in parallel with each other. It is fixed in the inset. The lower straight blades 1 and 1 have, for example, cutting edges 1a and 1a on the edge portions of the upper surface, and are arranged to face each other in parallel so that the intervals between the cutting edges 1a and 1a are a predetermined distance. The workpiece W is cut in cooperation with the upper round blade 3.
[0013]
The distance between the pair of lower straight blades 1 and 1 can be appropriately adjusted according to the thickness of the workpiece W or the like. By adjusting the distance between the pair of lower straight blades 1 and 1 (clearance adjustment), the shearing accuracy can be increased and the generation of burrs can be minimized (no burrs). The clearance here is the clearance with the upper round blade 3. Further, the upper surfaces of the lower straight blades 1, 1 are provided on the surface positions of the upper surfaces 9 b, 9 b of the lower cutting blade support bases 9, 9. As shown in FIG. 1, the lower cutting blade support bases 9 and 9 are provided above the rising portions 13 and 13 of the support base 11 having a substantially U-shaped cross section.
[0014]
As shown in FIGS. 1 and 2, the lower round blade 7 is a so-called round blade having a disk shape in which peripheral portions on both surfaces are cutting blades 7 a and 7 a. The lower round blade 7 has a shaft portion 15 provided at the center thereof rotatably attached to a lower round blade holder 17. The lower round blade 7 is inserted between the pair of lower straight blades 1, 1, and cooperates with the cutting blades 5 a and 5 a of the upper straight blades 5 and 5 described later and the cutting blades 7 a and 7 a of the lower round blade 7. The work is sheared by the action.
[0015]
As shown in FIGS. 1 and 2, the lower round blade holder 17 includes guides laid on the lower surfaces of the lower cutting blade support bases 9 and 9 along the longitudinal direction of the lower cutting blade support bases 9 and 9, respectively. The lower round blade moving slider 21 is slidable on the rails 19 and 19. The lower round blade holder 17 is attached to the lower round blade moving slider 21 via a piezoelectric element 23 which is a cutting depth adjusting means. The piezoelectric element 23 has a property of increasing its thickness when a voltage is applied, and a plurality of the piezoelectric elements 23 are formed so as to sufficiently secure a change amount of the thickness (a stroke amount for moving the lower round blade 7 up and down). .
[0016]
Therefore, the lower round blade 7 has a protrusion amount from the upper surface between the lower straight blades 1, 1 of the lower round blade 7 by controlling the voltage application to the piezoelectric element 23, for example, as shown in FIG. 3. Adjustable. This means that the cutting amount for the workpiece W that is a workpiece can be adjusted freely. Further, by using the piezoelectric element 23, the penetration depth adjusting mechanism can be made compact.
[0017]
As shown in FIGS. 1 and 2, the lower round blade moving slider 21 is provided with a pair of slide guides 25, 25 slidable on the guide rails 19, 19. The lower round blade moving slider 21 is movable in the longitudinal direction of the lower straight blades 1 and 1 by a ball screw 27 that is rotated by driving a servo motor (not shown). Accordingly, the lower round blade 7 provided on the lower round blade moving slider 21 runs while rotating between the pair of lower straight blades 1, 1 along the longitudinal direction of the lower straight blade 1, 1.
[0018]
As shown in FIGS. 1 and 2, the pair of upper straight blades 5, 5 is a straight cutting blade similar to the lower straight blades 1, 1, and the upper cutting blade support base 29 arranged in parallel is arranged. , 29 are fixed to the opposing surfaces 29a, 29a. The upper straight blades 5 and 5 are, for example, straight blades having cutting edges 5a and 5a at the edge portions on the lower surface, and are arranged oppositely in parallel so that the distance between the cutting edges 5a and 5a is a predetermined distance. Has been.
[0019]
The distance between the pair of upper straight blades 5, 5 can be adjusted as appropriate according to the thickness of the workpiece W as in the case of the lower straight blades 1, 1. Further, the lower surfaces of the upper straight blades 5 and 5 including the cutting blades 5a and 5a are provided at the surface positions with the lowermost surfaces 29b and 29b of the upper cutting blade support bases 29 and 29. The upper cutting blade support bases 29 and 29 are held by a ram 31 as shown in FIG.
[0020]
As shown in FIGS. 1 and 2, the upper round blade 3 is a so-called round blade having a disk shape in which the peripheral portions on both sides are formed as cutting blades 3 a and 3 a, as with the lower round blade 7. . The upper round blade 3 is configured to shear while rotating during processing by attaching a shaft portion 33 provided at the center thereof to a holder 35 for the upper round blade. The upper round blade 3 is inserted between the pair of upper straight blades 5 and 5, and the cutting blades 1 a and 1 a of the lower straight blade 1 and 1 cooperate with the cutting blades 3 a and 3 a of the upper round blade 3. Thus, the workpiece W is sheared.
[0021]
As shown in FIGS. 1 and 2, the upper round blade holder 35 is laid on the upper surface of each upper cutting blade support base 29, 29 along the longitudinal direction of the upper cutting blade support base 29, 29, respectively. The upper round blade moving slider 39 is slidable on the guide rails 37, 37. The upper round blade holder 35 is attached to the upper round blade moving slider 39 through a piezoelectric element 41 which is a cutting depth adjusting means so as to be automatically moved up and down.
[0022]
That is, the upper round blade holder 35 is attached to the upper round blade moving slider 39 with the piezoelectric element 41 interposed between the upper round blade moving slider 39 and a pair of slide guides extending upward. 43, 43 are inserted into the respective slide insertion holes 45, 45 formed in the upper round blade moving slider 39, and the slide guides 43, 43 are used as guides to move up and down with respect to the upper round blade moving slider 39. It is supposed to be movable. The amount of vertical movement of the upper round blade holder 35 is performed by controlling the magnitude of the voltage to the piezoelectric element 41.
[0023]
The piezoelectric element 41 increases the overlapping amount of the piezoelectric element 23 that drives the lower round blade holder 17 and increases the stroke amount for moving the upper round blade holder 35 (upper round blade 3) up and down. ing. Therefore, the upper round blade 3 has a larger amount of protrusion from the upper straight blades 5 and 5 than the lower round blade 7, that is, a larger amount of cut with respect to the workpiece W can be obtained.
[0024]
As shown in FIGS. 1 and 2, the upper round blade moving slider 39 is provided with a pair of slide guides 47, 47 slidable on the guide rails 37, 37. The upper round blade moving slider 39 is movable in the longitudinal direction of the upper straight blades 5 and 5 by a ball screw 49 rotated by driving a servo motor (not shown). Therefore, the upper round blade 3 provided on the upper round blade moving slider 39 travels between the pair of upper straight blades 5 and 5 while rotating along the longitudinal direction of the upper straight blades 5 and 5.
[0025]
As shown in FIG. 1, the ram 31 is driven by a ram driving cylinder 51 (not shown), and moves the upper straight blades 5, 5 toward and away from the workpiece W (arrow Z in the figure). Direction). That is, when the driving oil sucked up from the tank 55 by the hydraulic pump 53 is sent to the rear cylinder chamber 51 a of the ram driving cylinder 51, the cylinder 57 is pushed down, and the ram 31 is pushed against the workpiece W by the cylinder 57. approach. On the other hand, when the switching valve 59 connected to the hydraulic circuit is switched and the driving oil is sent to the front cylinder chamber 51 b of the ram driving cylinder 51, the cylinder 57 rises and the ram 31 is moved to the workpiece W by the cylinder 57. Can be lifted away.
[0026]
The hydraulic circuit is provided with a pressure sensor 61 for detecting the pressure in the front cylinder chamber 51b. The ram 31 is provided with a linear scale 63 for detecting the height position of the upper straight blades 5 and 5 and recognizing the thickness of the workpiece W.
[0027]
<Shearing method using shearing machine>
Next, a shearing method of the workpiece W by the shearing machine having the above configuration will be described.
[0028]
First, as shown in FIG. 1, the workpiece W is positioned by abutting against a back gauge 69 of a shearing machine. Then, driving oil is fed into the rear cylinder chamber 51 a of the ram driving cylinder 51 to bring the ram 31 close to the workpiece W, and the upper straight blades 5, 5 are connected to the lower straight blades 1, 1 via the workpiece W. Abut.
[0029]
When the upper straight blades 5 and 5 come into contact with the lower straight blades 1 and 1 through the workpiece W, the hydraulic pressure in the front cylinder chamber 51b of the ram driving cylinder 51 increases. This is detected by the pressure sensor 61 and the descending of the ram 31 is stopped. Further, the height position of the upper straight blades 5 and 5 is detected by the linear scale 63 to recognize the thickness of the workpiece W.
[0030]
Next, as shown in FIG. 4, while rotating the upper round blade 3 and the lower round blade 7 (shown on the left side in the figure) waiting in the lateral direction of the workpiece W, the lower round blade 7 is The blade 3 is moved in the right direction indicated by the arrow in the drawing along the guide rails 19, 19 and 37, 37 in advance of the blade 3. At this time, based on the data from the linear scale 63 connected to the ram 31, the work W is cut into about 1/3 to 1/2 of the plate thickness by the lower round blade 7.
[0031]
Then, as shown in FIG. 5, the upper straight blades 5, 5 and the lower round blade 7 make a cut 65 from the back surface side which is one surface of the workpiece W. That is, half shearing is performed from the back side of the workpiece W. Since the upper round blade 3 moves behind the lower round blade 7 so as to follow, the upper round blade 3 and the lower straight blades 1 and 1 are used to move the workpiece W to the other as shown in FIG. It shears along the said notch 65 from the surface side which is a direction. As a result, the chips 67 fall down, and the workpiece W is completely cut and sheared. When the workpiece W is sheared, the upper round blade 3 and the lower round blade 7 are returned to the original standby position (left position in FIG. 4).
[0032]
In this way, the half shear which cuts the workpiece W from the back side thereof by the lower round blade 7 and the upper straight blades 5 and 5 in a state where the processing part is firmly fixed from the upper, lower, left and right by the upper and lower four straight blades. Next, since the workpiece W is sheared by the upper round blade 3 and the lower straight blades 1 and 1 from the surface side, the workpiece W is not caught in the blade during processing, and the fracture surface does not appear on the surface. Therefore, there is no generation of burrs, or generation of burrs is suppressed as much as possible, and highly accurate shearing can be performed. Moreover, since the shearing of the workpiece W is a so-called two-way shear with the upper round blade 3 and the lower round blade 7 and the pair of lower straight blades 1, 1 and the upper straight blades 5, 5, all burrs are in the same direction. Therefore, the product value is also high.
[0033]
In addition, since the upper and lower round blades are inserted between the straight blades, the clearance is hardly changed and the rotational fluctuation is relatively suppressed, so that uniform shearing is performed even in the center of the workpiece W. And can also shear wide workpieces. Furthermore, since the cutting process with the upper round blade 3 and the lower straight blades 1 and 1 is continuously performed following the half shearing with the lower round blade 7 and the upper straight blades 5 and 5, the workpiece W is efficiently sheared. This can be done and can increase productivity. Moreover, since the chip | tip 67 generated by shearing falls below the lower straight blades 1 and 1, scrap processing becomes easy.
[0034]
The specific embodiment to which the present invention is applied has been described above, but the present invention is not limited to the above-described embodiment, and various modifications can be made.
[0035]
In the above-described embodiment, after half-shearing with the lower round blade 7 and the upper straight blades 5 and 5, the upper round blade 3 and the lower straight blade 1 are sheared with the upper round blade 3 and the lower straight blades 1 and 1. The same effect can be obtained by shearing with the lower round blade 7 and the upper straight blades 5 and 5 after half shearing with 1.
[0036]
Further, in the above-described embodiment, after the workpiece W is sheared, the upper round blade 3 and the lower round blade 7 are returned to the original standby positions to prepare for the shearing of the new workpiece W to be processed next. By moving the round blade 7 in advance of the upper round blade 3, the lower round blade 7 may shear the upper round blade 3 after half shearing. If it does in this way, the workpiece | work W can be sheared by reciprocation of the upper round blade 3 and the lower round blade 7, respectively, and the improvement of productivity can be implement | achieved.
[0037]
Further, as shown in FIG. 7, two lower round blades 7 and 7 are placed on the lower round blade moving slider 21 at a predetermined interval (the upper round blade 3 is positioned between the lower round blades 7 and 7. In the forward path, the lower round blade 7 (the lower round blade 7 on the right side in the figure) precedes the work W to make a cut 65, and the return path has not been half-sheared earlier. A new workpiece W is cut with the lower round blade 7 (the lower round blade 7 on the left side in the figure).
[0038]
In the case of such a configuration, since the drive mechanism for moving the lower round blade moving slider 21 and the upper round blade moving slider 39 can be made common, the apparatus configuration can be simplified.
[0039]
In this way, by providing two lower round blades 7 and reciprocating them, the workpiece W can be sheared in each of the forward path and the return path, so that the productivity can be further improved compared to the previous embodiment. .
[0040]
Further, although the piezoelectric elements 23 and 41 are used as the penetration depth adjusting means, other mechanisms such as a cylinder can be used.
[0045]
【The invention's effect】
As understood from the above such description, according to this onset bright, a lower round blade to the sandwiched work piece between a pair of lower linear blade and a pair of UeTadashiha forming a straight, rotates It is possible to cut from the back side by a pair of upper straight blades and to be cut from the front side by a rotating upper round blade and a pair of lower straight blades, so that generation of burrs can be suppressed. The workpiece can be sheared with a small force.
[Brief description of the drawings]
FIG. 1 is a front view of a shearing machine according to an embodiment.
FIG. 2 is an exploded perspective view of a main part of the shearing machine of the present embodiment.
FIG. 3 is an enlarged view of a main part showing the cutting state of the upper and lower round blades with respect to the workpiece in the shearing machine of the present embodiment.
FIG. 4 is a schematic view showing a state in which the lower round blade is sheared with the upper round blade in advance in the shearing machine of the present embodiment.
FIG. 5 is a perspective view showing a state in which the lower surface of the workpiece is cut by the lower round blade and the upper straight blade in the shearing machine of the present embodiment.
FIG. 6 is a perspective view showing a state in which the surface of the workpiece is cut by the upper round blade and the lower straight blade in the shearing machine of the present embodiment.
FIG. 7 shows another example of the shearing machine of the present embodiment, and is an exploded view of a shearing machine in which two lower round blades are provided on a slider for moving the lower round blade.
FIG. 8 is a perspective view showing a state in which half shearing is performed by a conventional shearing machine.
FIG. 9 is a perspective view showing a state in which shearing is performed by a conventional shearing machine.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lower straight blade 3 Upper round blade 5 Upper straight blade 7 Lower round blade 21 Lower round blade movement sliders 23 and 41 Piezoelectric element 39 Upper round blade movement slider 51 Ram drive cylinder

Claims (4)

A lower cutting blade support base (9) provided with a pair of linear straight lower blades (1) opposed to each other in parallel with a predetermined interval, and a vertically movable upper portion above the lower cutting blade support base (9). The plate-shaped workpiece (W) is firmly fixed between the ram (31) and the upper cutting blade support (29) provided in the ram (31) and between the lower straight blade (1). A pair of possible upper straight blades (5), a lower round blade moving slider (21) provided on the lower cutting blade support base (9) so as to be movable in the longitudinal direction of the lower straight blade (1), The lower round blade holder (17) provided in the lower round blade moving slider (21) is rotatably provided, and protrudes upward from between the pair of lower straight blades (1). 5) The lower round blade (7) for half-shearing the workpiece (W) in cooperation with 5) and the ram (31) moved in the longitudinal direction of the upper straight blade (5) The upper round blade moving slider (39) and the upper round blade holder (35) provided in the upper round blade moving slider (39) are rotatably provided, and the pair of upper straight blades ( 5) and an upper round blade (3) that projects downward from between the pair of lower straight blades (1) to half-shear the workpiece (W). Shearing machine. The shearing machine according to claim 1, wherein the amount of cutting with respect to the workpiece (W) is adjusted by adjusting the upward protrusion amount of the lower round blade (7) from between the lower straight blades (1). And a cutting depth adjusting means (23) for adjusting the lower round blade holder (17) up and down. 3. The shearing machine according to claim 1, wherein an amount of cutting with respect to the workpiece (W) is adjusted by adjusting an amount of downward protrusion of the upper round blade (3) from between the upper straight blades (5). Therefore, the shearing machine is provided with a cutting depth adjusting means (41) for adjusting the upper round blade holder (35) up and down. The shearing machine according to claim 1, 2, or 3, wherein when the workpiece (W) is firmly fixed by the lower straight blade (1) and the upper straight blade (5), the height of the upper straight blade (5) is increased. A shearing machine comprising a linear scale (63) for detecting the position and detecting the thickness of the workpiece (W).

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