JP6718329B2 - Work grip replacement cutting method - Google Patents

Description

INDUSTRIAL APPLICABILITY The present invention enables a V-groove processing beyond the processing range of a machine by performing overlapping V-groove processing after gripping a work piece in a cutting method in a punch press that performs V-groove processing by cutting. The present invention relates to a method for cutting and regripping a workpiece so as to enlarge groove processing.

Conventionally, for example, Japanese Unexamined Patent Application Publication No. 2014-172073 discloses an invention relating to a cutting die and a cutting method in a punch press that performs V-groove processing.

Among the above inventions, the former cutting die is provided with a cooling mechanism in the cutting tip incorporated therein, and the latter cutting method is to gradually cut into the workpiece. As a result, both have the effect of preventing wear of the cutting tip and extending the life.

JP, 2014-172073, A

However, in the case of the latter cutting method of the cutting die and the cutting method described above, the following problems occur.

That is, as shown in FIG. 16 of the present application, in the cutting method in a punch press, for example, a turret punch press, V-groove processing cannot be performed beyond the processing range N of the machine, and the V-groove processing range is extremely narrow.

For example, in the turret punch press (FIG. 2), the work W (FIG. 16) is moved to the left side while being held by the clamp 13 mounted on the carriage 12, so that the cutting die D (FIG. 1). ) And a punch P for cutting working in cooperation with the above), the V groove M (FIG. 16) is processed.

However, the moving range (X-axis direction) of the carriage 12 on which the clamp 13 is mounted is based on the length (X-axis direction) of the ball screw 15 (FIG. 2A) screwed to the carriage 12. There is a limitation, and it cannot move beyond the length of the ball screw 15, for example, to the left.

Therefore, the V groove M cannot be processed in the blank area on the right side of the work W gripped by the clamp 13.

In other words, in the turret punch press (FIG. 2), in the conventional processing method, the V groove M is processed in the first processing region R1 on the work W within the processing range N (FIG. 16) of the machine. However, the V groove M cannot be processed in the next second processing region R2.

An object of the present invention is to make it possible to perform V-groove processing in each of the entered processing areas by sequentially advancing a predetermined processing area of the work into the processing range of the machine after re-grabbing the work. It is an object of the present invention to provide a work-piece re-gripping cutting method that is designed to increase the size of the work piece.

In order to solve the above problems, the present invention, as set forth in claim 1,
In a cutting method in a punch press that performs V groove processing by cutting using the cutting tip 50,
(1) After performing the V-groove J1 machining on the first machining region R1 on the work W within the machining range N of the machine,
(2) Grasping the work W,
(3) Thereafter, within the machining range N of the machine, the V groove J2 is machined so as to overlap the V groove J1 of the first machining region R1 with respect to the second machining region R2 on the work W,
(4) The same operations as (2) and (3) above are repeated until the n-th processing region Rn on the work W,
(5) Work grip replacement cutting characterized by processing the entire V-groove T having a V-groove J of a predetermined length L with a constant depth H from the first processing region R1 to the n-th processing region Rn A technical means called a processing method is taken.

According to the above-described configuration of the present invention, first, the V-groove J1 is machined in the first machining region R1 on the work W within the machining range N of the machine (FIG. 3(A), step in FIG. 9). 101), the work W is gripped again (FIG. 3(B), step 102 in FIG. 9), and then, in the machining range N of the machine, the first machining region R1 is moved to the second machining region R2 on the work W. The V-groove J2 is machined so as to overlap the V-groove J1 (FIG. 3(C)→FIG. 4(A), step 103 in FIG. 9), and thereafter, the workpiece W is grasped up to the n-th machining region Rn on the workpiece W. By repeating the replacement and the overlapping V-groove processing (step 104 in FIG. 9), the V-groove T extending from the first processing region R1 to the n-th processing region Rn can be processed (FIG. 4(B), FIG. 9). Step 105).

Therefore, according to the present invention, after re-grabbing the work (FIG. 3(B)), the predetermined working area of the work is sequentially advanced into the working range of the machine (FIG. 3(C)). An effect of providing a work grip re-grinding cutting method that enables V-groove processing in each of the entered processing regions (FIG. 4(A)) and expands V-groove processing (FIG. 4(B)) Play.

FIG. 1 is an overall view of a die including a cutting die D used in a work gripping cutting method according to the present invention (hereinafter abbreviated as the present invention method) and a cutting punch P cooperating therewith. It is a figure which shows the application example of the method of this invention. It is an explanatory view of the first half operation in the method of the present invention. It is explanatory drawing of the latter half operation in the method of this invention. It is a figure which shows the detail of the V groove processing performed in the processing range of the machine of the method of this invention. FIG. 6 is an operation explanatory diagram of a cutting punch P and a cutting die D in the V groove processing of FIG. 5. It is explanatory drawing of other embodiment of operation|movement of the punch P for cutting and the die D for cutting in the V groove processing of FIG. It is explanatory drawing of the whole V groove processed by the method of this invention. 6 is a flowchart for explaining the operation of the method of the present invention. It is explanatory drawing of the relationship between the edge part processing speed in the V groove processing of FIG. 5, and the length of the groove which becomes deep gradually, and the groove which becomes gradually shallow. It is explanatory drawing of the cause of the deviation of the start end and terminal end of the V groove which can occur in the V groove processing of FIG. It is explanatory drawing of the cause of the deviation of the start end and terminal end of the V groove which can occur in the V groove processing of FIG. It is explanatory drawing of the whole V groove processed by the method of this invention. It is explanatory drawing of the overlapping part of the V groove processed by the method of this invention. It is explanatory drawing of the whole V groove processed by the application example of the method of this invention. It is explanatory drawing of a prior art.

Hereinafter, the present invention will be described with reference to the accompanying drawings according to embodiments.
FIG. 1 is an overall view of a die including a cutting die D used in a work grip re-cutting method according to the present invention and a cutting punch P cooperating with the die.

The die shown in FIG. 1 is applied to, for example, a turret punch press (FIG. 2). The upper frame 1 has a ram striker 2, the upper turret 6 has a cutting punch P, and the lower turret 7 has a cutting punch. A cutting die D that cooperates with the punch P is attached.

A through hole 45 is formed in the upper turret 6 (FIG. 1), and the cutting punch P is supported on the upper edge of the through hole 45 via a lift spring 31.

The cutting die D is fixed to the lower turret 7, and the cutting die 50 (FIGS. 6 and 7) used in the method of the present invention described later is incorporated in the cutting die D. There is.

The cutting tip 50 is V-grooved as in the method of the present invention by placing the work W thereon and moving it (for example, FIG. 6), has a predetermined shape, and has a single-sided type. There are various types of attachment structures, cooling structures, chip discharge structures, and up-and-down moving mechanisms, and a description thereof will be omitted (FIGS. 2 to 7 of Patent Document 1).
As described above, FIG. 2 shows an example in which the V-groove processing is performed by the cutting die D incorporating the cutting tip 50 which is a cutting tool, but the present invention is not limited to this, and the punch P side. The cutting tool may be incorporated in the turret, or the cutting tool may be incorporated in a position different from the turrets 6 and 7 in the turret punch press (FIG. 2).

FIG. 2 is a diagram showing a turret punch press of the punch presses to which the work grip re-cutting method according to the present invention is applied. As described above (FIG. 1), the turret punch press is an upper turret. 6 and a lower turret 7.

The upper turret 6 and the lower turret 7 are provided with a die composed of a cutting die D (FIG. 1) and a cutting punch P cooperating therewith, and various punches P for punching, forming, etc. The molds including the dies D are arranged concentrically.

The rotation mechanism of the turrets 6 and 7 is as follows.
That is, the chains 4 and 5 are wound around the rotary shaft 8 of the upper turret 6 and the rotary shaft 9 of the lower turret 7, respectively, and the chains 4 and 5 are wound around the drive shaft 3. Further, just above the punch P at the processing position K, the ram striker 2 that presses the punch P for cutting, for example, on the upper frame 1 to press down the entire punch P as described above (FIG. 1). Is provided.

With this configuration, when the drive shaft 3 is rotated by the motor M and the chains 4 and 5 are circulated, the upper turret 6 and the lower turret 7 are synchronously rotated, and a die including a predetermined punch P and a die D, For example, a die including a cutting die D (FIG. 1) according to the present invention and a cutting punch P cooperating therewith can be selected at the processing position K.

A Y-axis LM guide rail 17 is laid on the lower frame 21 (FIG. 2(B)) of the turret punch press, and a support bracket 16 is slidably coupled to the Y-axis LM guide rail 17. The work positioning device including the bracket 16 is as follows.

That is, the carriage base 11 is placed on the support bracket 16, and the ball screw 14 of the Y-axis motor My provided on the upper frame 1 is screwed onto the carriage base 11. Further, a carriage 12 to which a clamp 13 that holds the work W is attached is slidably coupled to an X-axis LM guide rail (not shown) on the carriage base 11, and the X-axis motor Mx is attached to the carriage 12. The ball screw 15 of FIG. 2(A) is screwed together.

Further, a center table 10 is fixed to the center of the turret punch press, side tables 10A and 10B are arranged on both sides of the center table 10, and the side tables 10A and 10B are attached to the support bracket 16. ing.

With this configuration, when the X-axis motor Mx is rotated, the carriage 12 moves on the carriage base 11 in the X-axis direction, and when the Y-axis motor My is rotated, the carriage base 11 supported by the support bracket 16 is moved. , Along with the side tables 10A, 10B in the Y-axis direction (FIG. 2(A)).

Therefore, the die including the cutting die D (FIG. 1) and the cutting punch P cooperating therewith is selected at the processing position K and is held by the clamp 13 mounted on the carriage 12 (FIG. 2). By positioning the workpiece W at the processing position K and moving the workpiece W on the cutting tip 50 as it is, cutting processing such as V-groove processing can be performed.

However, as described above (FIG. 10), in the moving range (X-axis direction) of the carriage 12 on which the clamp 13 is mounted, the ball screw 15 screwed onto the carriage 12 (FIG. 2A). There is a limit based on the length of the ball screw 15 (X-axis direction), and the ball screw 15 cannot be moved to the left side, for example, beyond the length of the ball screw 15. You cannot move further to the left.

Therefore, the second machining region R2 adjacent to the first machining region R1 on the work W cannot enter the machining range N of the machine, and therefore the V groove cannot be machined in the second machining region R2.

Therefore, the center table 10 (FIG. 2(A)) is provided with a work holding device 53 including a suction pad and the like, and after the work is re-gripped by performing work re-gripping (step 102 in FIG. 9) described later. By sequentially advancing the predetermined machining areas of the work into the machining range of the machine, V-groove machining can be performed in each of the machined machining areas, and the V-groove machining can be expanded.

If a known auto index device (die rotating mechanism) is installed, a predetermined cutting method (FIG. 14 of Patent Document 1) is performed using a single-sided cutting tip 50 (FIG. 2 of Patent Document 1). When performing, the direction of the cutting tip 50 can be automatically changed, so that the work W can be moved back and forth to perform machining in a reciprocating state, and the machining time can be shortened, but detailed description is omitted. To do.

Hereinafter, the cutting method according to the present invention will be described with reference to FIGS. 1 to 9.

(1) First, in step 101 of FIG. 9, the V groove J1 is processed in the first processing region R1 within the processing range N of the machine.

In this case, the processing range N of the machine is, for example, a space including the processing position K of the turret punch press (FIG. 2), and a predetermined V-groove processing is performed using the cutting punch P and the cutting die D. Is performed (FIG. 3(A), FIG. 5).

In the V-groove processing in this case, as shown in FIG. 5, for example, the same cutting tip 50 is used from the start to the end of the processing, and at the start of the processing, the V-groove g1 which becomes gradually deeper is processed, and then the constant depth H The V groove G is processed by a predetermined length L1, and when the processing is completed, the V groove g2 that becomes gradually shallower is processed.

According to this cutting method, as is well known, the cutting tip 50 receives less resistance from the work W than when the cutting tip 50 suddenly processes a V groove having a constant depth H. , By doing so, the wear of the cutting tip is prevented and the life is extended.

Thereafter, in the present invention, the same V-groove processing as described above is performed within the processing range N of the machine (FIGS. 3 to 4).

The first processing region R1 (FIG. 3(A)) is a region where the V groove on the work W is processed, and the second processing region R2 (FIG. 4(A)),..., And The same applies to the nth processing region Rn (FIG. 4(B)).

Then, in step 101 of FIG. 9, more specifically, the V groove J1 is machined in the first machining region R1 on the workpiece W within the machining range N of the machine (FIG. 3A). The work W is held by a clamp 13 mounted on a carriage 12 movably attached to a carriage base 11 of a turret punch press.

The operations of the cutting punch P and the cutting die D when the V groove processing (FIG. 3A) is performed are as follows.

That is, as shown in FIG. 6, simultaneously with the start of machining, for example, the work W is moved to the left and the punch P for machining is gradually lowered to be brought into contact with the work W, thereby cutting on the die D for machining. The tip 50 gradually bites into the work W.

As a result, at the start of processing, the V groove g1 that becomes gradually deeper is processed.

After that, while moving the work W pressed by the punch P for cutting in the same direction, the V groove G having a constant depth H as shown in FIG. 5 is processed by a predetermined length L1.

Then, as the end of processing approaches, the punch P for cutting (FIG. 6) is gradually raised and separated from the work W, whereby the V groove g2 that becomes gradually shallower at the end of processing is processed.

By such movements of the cutting punch P and the cutting die D, the V groove g1 at the start of processing and the V groove g2 at the end of processing in the V groove processing (FIG. 3A) are extremely clean and smooth. Is processed.

Therefore, even when the V-grooves are overlapped (FIG. 3C), the overlapping portion of the V-grooves g1 and g2 (enlarged view of reference numeral A) is neatly processed, and the first processed region R1 to the n-th region are processed. A V groove J (FIG. 8C) having a constant depth H and a predetermined length L over the processing region Rn is formed straight without distortion.

Further, FIG. 7 shows another embodiment of the operation of the punch P for cutting and the die D for cutting when the V-groove processing (FIG. 3(A)) is performed, and differs from FIG. 6 in that At the start of processing, the cutting die D is gradually raised, and at the end of processing, the cutting die D is gradually lowered.

However, it is the same that the method of FIG. 7 also provides the V groove g1 (FIG. 3A) that gradually becomes deeper and the V groove g2 that gradually becomes shallower.

(2) Next, in step 102 of FIG. 9, the work W is gripped again.

That is, after holding the work W (FIG. 3B) by the work holding device 53 (FIG. 2) such as the suction pad described above, the clamp 13 is released from the work W, and then the clamp 13 is mounted. By moving the carriage 12 to the right and gripping the work W, the work W is gripped again.

(3) Then, in step 103 of FIG. 9, the V-groove J2 is machined in the machining range N of the machine so as to overlap the second machining region R2.

In this case, more specifically, within the machining range N of the machine, the V groove J2 is machined so as to overlap the V groove J1 of the first machining region R1 with respect to the second machining region R2 on the workpiece W. There is a case.

First, as shown in an enlarged view of reference numeral A in FIG. 3C, a position P1 (depth H) at which the V groove g1 which becomes gradually deeper at the start of processing of the V groove J2 in the second processing region R2 ends. The position (the position in the left-right direction (X-axis direction) when reaching the lower part of FIG. 8A) is the position where the V groove g2 that becomes gradually shallower at the end of processing of the V groove J1 in the first processing region R1 starts. This is the case at the same position as P2.

Secondly, as shown in the lower parentheses in FIG. 3C, a position P1 at which the V-groove g1 that becomes gradually deeper at the start of machining of the V-groove J2 in the second machining region R2 ends (similarly to the depth The V groove g2, which becomes gradually shallower at the end of the machining of the V groove J1 in the first machining region R1, starts at the position H (the lower position in FIG. 8A) in the left-right direction (X-axis direction). This is the case on the left side (inside) of the position P2.

In this case, between the position P1 where the V groove g1 which becomes gradually deeper ends and the position P2 where the V groove g2 which becomes gradually shallower starts are shown by a solid line, and cutting is performed, so that there is a margin. I have it.

Thirdly, as shown in the upper parentheses in FIG. 3C, a position P1 at which the V groove g1 that becomes gradually deeper at the start of processing of the V groove J2 of the second processing region R2 ends (also, the depth The V groove g2, which becomes gradually shallower at the end of the machining of the V groove J1 in the first machining region R1, starts at the position H (the lower position in FIG. 8A) in the left-right direction (X-axis direction). This is the case on the right side (outside) of the position P2.

In this case, cutting is not performed between the position P1 at which the gradually deepening V groove g1 ends and the position P2 at which the gradually shallowing V groove g2 starts, and uncut residue is left.

Among the first to third overlapping processing methods, if P1 is aimed at the same position with respect to P2 as in the first processing (enlarged view of reference numeral A in FIG. 3C), the third processing is performed. When P1 is displaced to the right with respect to P2 as in (inside the parentheses in FIG. 3C), the uncut portion is left.

Therefore, in order to avoid such a situation, as shown in the second machining (inside the lower parentheses in FIG. 3C), it is desirable to prepare a machining program with a margin.

Further, regarding the cutting resistance when cutting the V groove J2 in the second processing region R2, the V groove g1 portion which becomes gradually shallower than the V groove J1 which is suddenly processed as compared with the case where the V groove having a constant depth H is suddenly processed. Since the V-groove having a constant depth H is cut, the cutting resistance is reduced, which prevents wear of the cutting tip 50 and prolongs the life.

(4) Then, in step 104 of FIG. 9, the same operations as (2) and (3) above are repeated until the n-th processing region Rn on the work W.

That is, when the work W is machined, which machining area on the work W is machined is set in advance by, for example, a machining information determining unit which constitutes a control unit (not shown) of the turret punch press (FIG. 2). I am doing it.

Therefore, for example, if it is set in advance to machine up to the fifth machining region R5, in the present invention, re-grasping of the workpiece W and overlapping V groove machining (from the second machining region R2 to the fifth machining region R5). Steps 102 and 103 in FIG. 9 are repeated, and generally, the same operation is repeated up to the nth processing region Rn (FIG. 4B).

(5) Finally, in step 105 of FIG. 9, the V groove T extending from the first processing region R1 to the nth processing region Rn is processed (FIG. 4B).

More specifically, the entire V-groove T having the V-groove J having a constant depth H and a predetermined length L from the first processing region R1 to the n-th processing region Rn is processed (FIG. 8A). (Upper figure is back view, lower figure is side view).

That is, there is a V groove that gradually becomes deeper at the left end and a V groove that gradually becomes shallower at the right end, and the entire V groove T having a V groove J having a predetermined depth L and a constant depth H is machined midway.

However, the work W portions W1 and W2 including the gradually deepening V groove g1 and the gradually shallower V groove g2 at both ends of the entire V groove T are usually not valuable as products.

Therefore, when the V-groove processing is completed (FIG. 8A, YES in step 106 of FIG. 9 ), that is, when the processing is completed up to the last n-th processing area Rn, both ends of the product which are unnecessary as the product are removed. The work W portions W1 and W2 are cut (FIG. 4(C), FIG. 8(B), step 107 in FIG. 9), and the work in which the V groove J having the predetermined depth H and the predetermined length L is processed. Only the W part is left as a product.

As described above, when the processing is completed up to the last n-th processing area Rn, it is mentioned that the workpiece W portions W1 and W2 at both ends which are unnecessary as the product are cut (FIG. 4(C), FIG. 8(B), step 107 in FIG. 9), instead of cutting the unnecessary work W portions W1 and W2 all at once, for example, machining the V groove J1 in the first machining region R1 (FIG. 8A). After the end, the unnecessary work portion W1 may be cut in advance.

Next, application examples of the method of the present invention will be described with reference to FIGS.

First, as a premise for explaining this application example, the difference in the finish of the V groove depending on the end processing speed in the V groove processing by the turret punch press will be described with reference to FIG. 11. Here, the edge processing speed in the following description means the Z direction of the punch P with respect to the unit movement amount of the workpiece W in the X direction when processing the V groove g1 that gradually becomes deeper or the V groove g2 that gradually becomes shallower. It refers to the amount of movement. The edge processing speed can be adjusted by controlling the X-direction feed speed of the work W and the Z-direction feed speed of the ram striker 2 (cutting punch P). When the processing speed of the end portion is slow, the length Lg1s of the V groove g1 or the length Lg2s of the g2 becomes long, and the start end or the end of the V groove J to be processed is finished in a V shape that gently extends (FIG. 10(A)). ). On the other hand, when the end processing speed is fast, the length Lg1f of the V groove g1 or the length Lg2f of the V groove g2 becomes short (Lg1f<Lg1s, Lg2f<Lg2s), and the start end or the end of the V groove J to be processed is steep. It is finished in a V shape that narrows (Fig. 10(B)).

Next, the edge processing speed suitable for the method of the present invention will be described.
Here, if attention is paid to step 107 in FIG. 9, it is desirable that the work W portions W1 and W2 at both ends of the V groove J which are not required are shorter, as shown in FIG. 4C. Therefore, considering only this point, it can be said that it is better to process the V grooves g1 and g2 at a higher edge processing speed. However, in the method of the present invention, the following problems may occur when simply using a high edge machining speed.

The turret punch press in FIG. 2 has two clamps 13 arranged in the X direction, and one side of the work W is gripped by these and the work W is fixed. Therefore, when processing the V groove J extending in the arrangement direction of the clamps 13, that is, the X direction, if the work W is moved to the left side of the paper surface of FIG. 11A (black arrow in FIG. 11A), Causes a clockwise rotation moment about the cutting tip 50 as a fulcrum due to the resistance of the cutting tip 50 (white arrow in FIG. 11A). Then, when this rotational moment becomes large, the V groove J is distorted in the X direction, and a deviation dy occurs between the positions of the start end and the end in the Y direction (FIG. 11(B)).

When processing the V groove J extending in the direction orthogonal to the arrangement direction of the clamps 13, that is, in the Y direction, for example, the work W is moved to the upper side of the paper surface of FIG. 12 (black arrow in FIG. 12 ). Therefore, when the V groove is machined between the clamps 13 in the X direction of the work W like the V groove Jc, no rotation moment is generated in the work W. On the other hand, when the V groove is processed outside the clamp 13 in the X direction of the work W, like the V groove Js, it is considered that some rotation moment is generated in the work W. However, in the method of the present invention, since all the V grooves J are processed in the X direction, it is not necessary to consider the case where the V grooves J are processed in the Y direction.

In the method of the present invention, the V groove J extending in the X direction is processed for each processing region, and the V groove T extending in the X direction is formed by repeating the processing. Therefore, the V-shaped groove T after processing is affected by the distortion of each V-shaped groove J. Specifically, when the V groove T to be formed is extremely expressed, as shown in FIG. 13, a slight step may occur in the Y direction at the overlapping portion of the adjacent V grooves J (broken line a101 in FIG. 13). ). In particular, when a high end machining speed is used, as shown in FIG. 14, the V-shaped V grooves g1 and g2 that are sharply narrowed are combined at the overlapping portion of the V grooves J surrounded by the broken line a101. Therefore, the step becomes more conspicuous.

Therefore, in this application example, the V groove T is formed while switching the end processing speed.
Specifically, as shown in FIG. 15, of the V-grooves g1 and g2, the V-groove g1 of the first processing region R1 which is the start end of the V-groove T is “g1′” and is the end of the V-groove T. When the V groove g2 of the nth processing region Rn is set to "g2'", the V grooves g1' and g2' are processed at a relatively high end processing speed (broken line a102 in FIG. 15), and the other V grooves g1. And g2 are processed at the end part processing speed slower than that at the time of processing the V grooves g1′ and g2′ (broken lines a103 and a104 in FIG. 15). That is, the lengths Lg1′ and Lg2′ of the V grooves g1′ and g2′ are processed to be short, and the lengths Lg1 and Lg2 of the other V grooves g1 and g2 are lengthened.

In this case, in the middle portion of the V groove T, the V grooves g1 and g2 are processed into a comparatively gentle V shape, so that the adjacent V groove g2 and V groove g1 can be fit well. As a result, the step of the overlapping portion of the V groove J is not conspicuous, and the V groove T that smoothly extends from the start end to the end can be formed. On the other hand, since the V grooves g1′ and g2′ that come into contact with both ends of the V groove T are processed at a high end processing speed, they are shortened and the increase of the work W portions W1 and W2, which have no value as a product, is suppressed. To be done.

That is, according to this application example, it is possible to form the V groove T that is smoother and has less steps while suppressing an increase in the work portions W portions W1 and W2.

The present invention makes it possible to perform V-groove processing in each of the entered processing areas by sequentially advancing a predetermined processing area of the work into the processing range of the machine after re-grabbing the work. A turret punch having an upper turret and a lower turret in which a plurality of pairs of dies are arranged, as well as a single punch press in which a pair of dies is arranged, which is used for a work piece re-gripping cutting method designed to be enlarged. It is also applied to presses and is extremely useful.

1 Upper Frame 2 Ram Striker 6 Upper Turret 7 Lower Turret 13 Clamp 21 Lower Frame 31 Lift Spring 39 Discharge Hole 45 Through Hole 41 Die Body 50 Cutting Tip 51 Cooling Mechanism 52 Discharging Mechanism 53 Work Holding Device D Cutting D P Cutting Punch W Work W'Chip

Claims (7)

A cutting method in a punch press for performing V-groove processing by cutting using a die including a cutting die equipped with a cutting tip and a punch for cooperating with the die .
(1) In a state where the workpiece by the clamp of the punch press is gripped, by entering a part of the working area on the workpiece in the machining area of the machine, was V groove processing with respect to the machining area rear,
(2) so that the next machining area a V-groove with respect to processed processing area adjacent to the extending direction of said V-groove is possible enter the machining area of the machine, the clamp with gripping sort Rukoto the workpiece Change the gripping position of the work by
(3) After that, the position where the V groove of the next processing region starts overlaps with the position where the V groove of the previous processing region ends by causing the next processing region of the workpiece to enter the processing range of the machine. As described above, a V-groove that is continuous in the extending direction of the V-groove of the previous processing region is processed with respect to the next processing region ,
(4) The same operations as (2) and (3) above are repeated until the n-th processing area on the work,
(5) Work gripping sort cutting method characterized by machining a V-groove that have a Wataru Ru length from the machining region to the n processing region of (1). In the V-groove processing of the above (1) and (3), the V-groove which becomes gradually deeper is processed at the start of processing, and then the V-groove of a predetermined length is processed at a constant depth. 2. The workpiece grip replacement cutting method according to claim 1, wherein a V groove that becomes gradually shallower is machined. In V groove processing of (1) and (3), the movement of the end processing and the start machining is, at the start, cutting punches gradually lowered, at the end of processing, gradually cutting punch 3. The work re-gripping cutting method according to claim 2, wherein the cutting die is gradually lifted at the start of machining, or the cutting die is gradually lowered at the end of machining. Within working range of the machine (3), when processing the V grooves superimposed on V grooves of the front of the working area to the next working area on the workpiece, V of the working region of said next The position at which the gradually deepening V-groove at the start of machining the groove ends is inside or at the same position as the position at which the gradually shallower V-groove at the end of machining the V-groove in the preceding machining region starts. The method for re-gripping a workpiece according to claim 1, 2, or 3. After the processing of (5) above is completed, the work portion including the V groove that becomes gradually deeper at both ends of the entire V groove and the V groove that becomes gradually shallower is not valuable as a product, and is cut, so that the above-mentioned constant depth is obtained. The method according to claim 1, wherein only a work portion including a V groove having a predetermined length is left as a product. The gradually deepening V-groove of the preceding processing region and the gradually deepening V-groove other than the end processing speed of the gradually shallowing V-groove of the n-th processing region, and the other The method for re-gripping a workpiece according to claim 2 or 3, wherein the processing speed of the end portion of the V groove which becomes gradually shallower is decreased. The clamp has a plurality arranged in a first direction,
The said punch press processes the said V groove in the said 1st direction. The workpiece re-gripping cutting processing method of Claim 6 characterized by the above-mentioned.

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