JP2818011B2 - Processing method in turret punch press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a processing method in a turret punch press.
The present invention relates to a processing method in a turret punch press that enables the removal of offcuts and products from the machine, the change of a working abutment reference surface, and the like.

(Prior Art) Conventionally, when performing punching with a turret punch press, one side edge of a work is gripped by a work clamp member, and the work is moved and positioned. For this reason, the periphery of the work clamp member becomes a dead zone which cannot be machined, and this dead zone portion is discarded as scrap material or the clamp member is re-clamped to avoid the dead zone. At present, processing is performed from the beginning avoiding the dead zone region in consideration of the arrangement of the dies.

(Problems to be Solved by the Invention) By the way, when performing punching with the above-described conventional turret punch press, a work dead zone is generated, so that the yield of the work is poor. It becomes an area, and the worker is performing the processing while performing the confirmation work each time. If this checking operation is neglected, the clamp member may be punched out.

Replacing the clamp member to avoid the machining dod zone requires a lot of manpower and time to regrip the clamp member, especially when the length of the clamp side is short or there is a notch on the work clamp side. And could not be processed automatically, so they were discarded as scraps. In order to avoid the machining dead zone, use of a clamp positioner, repositioning, a special clamp, or the like is conceivable. However, there is a problem that complicated and large-sized equipment is required, and equipment cost is increased.

As described above, there is a problem that all the stations of the mold cannot be fully used and a problem that a check operation is required and productivity cannot be improved.

SUMMARY OF THE INVENTION An object of the present invention is to improve the above problems by eliminating the machining dead zone by converting the position of a workpiece during machining, thereby improving yield, simplifying a machining program, and saving labor. The object of the present invention is to provide a processing method.

[Means for Solving the Problems] To achieve the above object, the present invention provides an upper turret equipped with a number of upper dies, and a number of lower dies facing the upper dies. A driving member and a fixed holding device for rotatably providing a lower turret having a mold mounted thereon and for simultaneously rotating the upper and lower rotating dies at symmetric positions of the upper turret and the lower turret by the same angle in the same direction. And a turret punch press in which the ram position is controllable and the upper and lower rotary dies are rotated in a punching state to convert the position of the work.

(Operation) By employing the processing method in the turret punch press of the present invention, a punching processing state, that is,
The upper and lower rotary molds are rotated while the work is held between the upper and lower rotary molds. For example, punching is performed to the vicinity of the processing dead zone, and then the work is rotated by 180 degrees and the processing is performed again, whereby the processing dead zone can be eliminated and the yield can be improved.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 9, the turret punch press 1 has an upper frame 9 supported by side frames 5 and 7 erected on both sides of a base 3 to form a portal. On the lower surface of the upper frame 9, a disk-shaped upper turret 13 on which a number of upper dies 11 are mounted is rotatably mounted on an upper rotating shaft 15. On the upper surface of the base 3, a lower turret 19 to which a number of lower dies 17 opposed to the respective upper dies 11 are mounted is rotatably mounted by a lower rotating shaft 21.

A ram 23 is provided on the lower surface of the upper frame 9 so as to be vertically movable, and the upper and lower dies 11, 17 are located immediately below the ram 23.

With the above configuration, the upper turret 13 and the lower turret
19 is rotated in the same direction synchronously by a servomotor (not shown) mounted in the base 3 and the upper frame 9. After attaching to upper turret 13 and lower turret 19,
The lower dies 11, 17 are indexed and positioned just below the ram 23, and the workpiece W is subjected to desired punching.

Guide rails 25 extending in the left-right direction in FIG. 9 are respectively provided on the front and rear surfaces near the upper surface of the base 3, and a movable table 27 is movably supported on each guide rail 25. The movable tables 27 are located on both front and rear sides of a fixed table 29 fixed on the base 3, and each movable table 27 is integrally formed by a first carriage 31 extending in the front-rear direction while straddling the fixed table 29. Connected to.

On the first carriage 31, a second carriage 33 that is movable in the front-rear direction perpendicular to the moving direction of the movable table 27 is mounted. Multiple clamping devices that can grip the side edge
35 is mounted so that the position can be adjusted in the front-back direction.

According to the above configuration, one end of the work W is gripped by the plurality of clamp devices 35, and the position of the first carriage 31 or the clamp device 35 is controlled by numerical control to a desired punching processing position, thereby moving and positioning the work W. You.

As shown in FIG. 10 and FIG. 11, at an appropriate number of places (symmetrical positions in the present embodiment) on the upper surface of the upper turret 13, an upper rotary mold holder 37a rotatable with respect to the upper turret 13, 37b is rotatably mounted. The upper rotary mold holders 37a and 37b are interlockingly connected so as to rotate in conjunction with a first interlocking member 39 which extends in the radial direction on the upper turret 13 and is rotatably mounted.

The lower turret 19 has an upper rotary mold holder 37a,
Lower rotary mold holders 41a and 41b are rotatably mounted on the lower turret 19 at positions corresponding to 37b, and the lower rotary mold holders 41a and 41b extend radially to the lower turret 19. The second linking member 43, which is rotatably mounted, is interlockingly connected so as to rotate in conjunction with the second interlocking member 43.

The structure of the first interlocking member 39 and the second interlocking member 43 is substantially the same, and both ends thereof are formed in an upper turret.
13. The lower turret 19 slightly projects radially from the outer peripheral edge. The end of the first interlocking member 39 is freely engageable with the end of the first transmission shaft 47 of the upper transmission 45 mounted on the upper frame 9, and the end of the second interlocking member 43 is mounted on the base 3. The lower transmission 49 can be engaged with the end of the second transmission shaft 51 in the lower transmission 49.

The upper and lower transmissions 45 and 49 have substantially the same configuration, and are each interlocked and connected to, for example, a rotary drive 55 using a servo motor 53 as a drive source.

In addition, a fixed holding device 57 is mounted on a part of the first conductive shaft 47 so as to prevent rotation of the first conductive shaft 47 and hold the first conductive shaft 47 in a fixed state. The fixed holding device 57 is made of, for example, an electromagnetic or mechanical brake device, and the details thereof are omitted.

Further, a brake ring 61 is integrally attached to an appropriate position of the connection shaft 59 in the first interlocking member 38, and a position corresponding to the brake ring 61 of the upper turret 13 is
A fixed holding device 63 that can hold and fix the brake ring 61 is mounted. This fixed holding device 63
To prevent the first interlocking member 39 and the upper rotary mold holders 37a, 37b from rotating due to vibration or the like. The pressing cylinder 65a, which releases the gripping of the brake ring 61, is used. 65b is provided at a symmetric position of the upper frame 9.

Note that the second interlocking member 43 is also provided with the fixing and holding device 63 provided in the first interlocking member 39 described above, and the configuration is the same, and the same reference numerals are given and the description is omitted.

With the above configuration, after the upper and lower dies 11, 17 to be rotated with respect to the upper and lower turrets 13, 19 are indexed directly below the ram 23, the end of the first interlocking member 39 and the first transmission shaft The end of 47 is engaged by operating a hydraulic cylinder (not shown).
Similarly, the end of the interlocking member 43 is engaged with the end of the second transmission shaft 51.

Thereafter, the fixed holding devices 57 and 63 are loosened, and the rotation driving device 55 is rotated to thereby rotate the upper rotation molds 37a and 37b.
And the lower rotary molds 41a and 41b are simultaneously rotated in the same direction, and the angular position with respect to the upper and lower turrets 13 and 19 can be changed. After the angular position is set, the fixed holding devices 57 and 63 are fixed in the holding state, and then the punching operation is performed.

On the other hand, regarding the driving of the ram 23, as shown in FIG. 12, the cylinder device 67 has a piston 71 in a cylinder main body 69, and the ram 23 extends downward to the piston 71.
Are provided integrally. Immediately below the ram 23, an upper mold 11 attached to the upper turret 13 and a lower mold 17 attached to the lower turret 19 are set. Upper mold 11 is upper mold holder 73
Reference numeral 75 denotes a stripper spring for stripping the upper die 11 from the plate material W, and 77 denotes a lift spring for urging the plate pressing portion 79 to the plate material W.

The hydraulic circuit 81 includes a hydraulic pump OP and the cylinder body 69.
Upper and lower cylinder chambers and piping OL1, OL2
And a servo valve 83 that is connected via the. The pipe OL1 is provided with a pressure detector 85 for detecting the oil pressure of the pipe OL1 by an electric signal.

The NC device 87 is an example, and various other controls can be added.

The NC device 87 has an NC data input unit 89, a main control unit 91, a Z-axis command unit 93, and a servo control unit 95.

The NC data input unit 89 is, for example, communicated with CAD / CAM offline or online, receives NC data for control in the turret punch press 1 from the CAD / CAM, and sends the NC data to the main control unit 91. providing.

Although not shown, the main control unit 91 stores information and the like in a processing speed pattern storage unit, and stores various processing speed patterns according to, for example, the material and thickness of the plate material W.

The main control unit 91 is operated by the operating system,
Upon receiving the NC data from the NC data input unit 89, it mainly performs position control of the plate material W and drive control of the cylinder device 67. The main control section 91 is connected to various sensors, limit switches, and other various actuators, and controls the turret punch press 1 as a whole.

The Z-axis command section 93 receives the Z-axis command data from the main control section 91 and outputs data of the position and speed for driving the servo valve.

The servo valve control unit 95 receives the position data and the speed data from the Z-axis command unit 93, and controls the servo valve 83 to a predetermined position and a predetermined opening.

The cylinder device 67 is operated by the control means described above,
The upper die 11 and the lower die 17 cooperate to perform a predetermined punching process on the plate material W. Further, since the position of the ram 23 of the cylinder device 67 can be controlled, the work W
That is, the cylinder device 67 can be stopped while the upper mold 11 is inserted into the lower mold 17 and penetrates the work W.

Punching is performed on the workpiece W by the turret punch press 1 having the above configuration. A method for avoiding the processing dead zone will be described with reference to FIGS. 1 to 6.

Referring to FIG. 1, one side edge of the work W is gripped by the clamp device 35, and normal processing is performed from the front end (−Y side) of the work W. However, the portion gripped by the clamp device 35 (the portion shown by oblique lines in the figure) is the machining dead zone E
Becomes

When the size of the work W is small, as shown in FIG. That is, processing is performed to a portion that does not enter the override region.

When the size of the work W is large, as shown in FIG. 2 (B), processing is performed to the position where the rotation radius of the work W is the smallest, that is, the center of the work W. (In the drawing, the processed holes are indicated by solid lines, and the unprocessed holes are indicated by dotted lines.) Then, as shown in FIG. 3, at the position where the turning radius of the workpiece W is the smallest, the auto index station, The first interlocking member 39 and the second interlocking member described above.
The upper die 11 and the lower die 17 (rotary die) mounted on the upper rotary die holder 37 and the lower rotary die holder 41 which rotate in conjunction with 43 perform punching. Then, the grip of the clamp device 35 is released, and the first carriage 31 is moved backward.

When punching is performed by the upper die 11 and the lower die 17 in cooperation with each other, the control means described above, that is, the position of the ram 23 of the cylinder device 67 is controlled, and the work W is placed in the processing state. The mold 11 is inserted into the lower mold 17 and pressed and held while penetrating the work W. (See FIG. 4) Next, as shown in FIG. 5, the first interlocking member 39 and the second
By rotating the interlocking member 43, the upper rotary mold holder 37 and the lower rotary mold holder 41 are rotated by 180 degrees. When the work W is rotated by 180 degrees, the state shown in FIG. 6 is reached, the first carriage 31 is advanced, the work W is gripped by the clamp device 35, and the unprocessed portion of the processing dead zone E and the remaining portion are removed. Process. In order to rotate the work W with the upper mold 11 inserted into the work W, the upper rotating mold holder 37 is required.
In addition to the frictional force between a and the lower mold 17, the work W can also be rotated by the upper mold 11, so that the rotation accuracy can be improved.

With the processing method as described above, the upper mold 11 and the lower mold 17 can be rotated by the auto index, the rotation angle of 180 degrees can be easily determined, and the upper mold 11 can be held in a state of being inserted into the work W. . Therefore, by using these operations, the workpiece W can be rotated by automatic operation, the machining dead zone can be eliminated, the yield can be improved, and the work such as simplification of the machining program and confirmation of override can be eliminated. Labor saving is achieved, and malfunctions such as punching out of clamps can be avoided.

In addition to the above-described processing method, in the line operation, the abutment surface of the work W against the clamp or the locator pin or the like can be set to an arbitrary surface such as 90 degrees, 180 degrees, and 270 degrees.

That is, by changing the angle of the work W shown in FIG. 7 (A) variously, (B-1), (B-
2), (B-3) It is possible to change the position of the work W as shown in FIGS. In the drawings, (a), (b), and (C) show each side of the work W.

In addition, it is also possible to carry out large-sized scraps outside the machine without using a scrap shooter. Referring to FIGS. 8 (A) and 8 (B), the large material scrap S is pressed and clamped between the upper mold 11 and the lower mold 17 and rotated 90 degrees to be sent out to the pipe roller conveyor 97 and the like. The large material scrap S is carried out.

The present invention is not limited to the embodiments described above, but can be embodied in other forms by making appropriate changes.

[Effects of the Invention] As can be understood from the above description of the embodiments, according to the present invention, the upper and lower rotating dies at the symmetrical positions of the upper turret and the lower turret are simultaneously placed in the same direction in the same direction. Using a turret punch press that can be rotated by an angle and that can control the ram position, the upper and lower rotary molds are rotated in the punching state to change the position of the work.

For this reason, the machining dead zone of the workpiece is eliminated, the yield is improved, the machining program is simplified and labor is saved, and at the same time, offcuts, products are taken out of the machine, and the abutment reference surface for machining is changed. And so on.

[Brief description of the drawings]

1 to 6 show a machining dead zone avoiding method according to the present invention. FIG. 1 is an explanatory view showing a machining dead zone, and FIGS. 2A and 2B show a machining range according to the size of a workpiece. Explanatory drawing, FIG. 3 is an explanatory view of drilling at the auto index station, FIG. 4 is an explanatory view showing a punching state, FIG. 5 is an explanatory view of a rotating state, and FIG. It is. 7 and 8 show another embodiment, and FIGS. 7 (A), (B-1), (B-2), and (B-3) show abutment against a workpiece clamp or a locator pin. FIG. 8A and FIG. 8B are explanatory diagrams of the operation when unloading large-sized offcuts. FIG. 9 is a side view of a turret punch press according to one embodiment of the present invention, and FIG.
FIG. 11 is an enlarged plan view along the line, FIG. 11 is an enlarged side view in FIG. 10, and FIG. 12 is an explanatory diagram showing a hydraulic circuit and a control circuit for operating the ram. 1 Turret punch press 11 Upper die 13 Upper turret 17 Lower die 19 Lower turret 23 Ram 37a, 37b Upper rotary die holder 39 First interlock Members 41a, 41b: Lower rotating mold holder 43: Second interlocking member, 45: Upper transmission device 49: Lower transmission device, 55: Rotary drive device 57: Fixed holding device, 63: Fixed holding device Equipment 81 …… Hydraulic circuit, 87 …… NC equipment

Claims (1)

(57) [Claims] 1. An upper turret on which a number of upper dies are mounted;
A lower turret on which a number of lower dies are mounted is provided rotatably in opposition to the upper mold, and the upper and lower rotary dies at symmetric positions of the upper turret and the lower turret are simultaneously moved in the same direction. In a turret punch press having a drive member and a fixed holding device for rotating by the same angle and controlling the ram position, the upper and lower rotary dies are rotated in a punching state to change the position of the work. A processing method in a turret punch press.