JPH0446640A - Working method in turret punch press - Google Patents

Abstract

PURPOSE:To dissolve a working dead zone of a work and to improve the yield by rotating upper and lower rotary dies in a punching state to transform the position of a work. CONSTITUTION:After upper and lower dies to be turned to upper and lower turrets are indexed just below a ram 23, both end part of a 1st interlocking member 39 and end part of a 1st transmission shaft 47 are engaged by actuating a fluid pressure cylinder and the end part of a 2nd interlocking member 43, too, is engaged, similarly, with the end part of a 2nd transmission shaft 51. Thereafter, upper rotary dies 37a, 37b and lower rotary dies 41a, 41b are rotated by loosening a fixing and holding device and rotating and driving a rotary driving device simultaneously in the same direction and an angular position can be changed to the upper and lower turrets. After the angular position is set, the fixing and holding device is fixed into a holding state and then punching is performed.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention relates to a processing method in a turret punch press, and more specifically, it relates to a processing method in a turret punch press. This invention relates to a machining method in a droop/throat bunch press that allows for carrying out, changing the abutting reference surface for machining, etc.

(Prior Art) Conventionally, when punching is performed using a turret punch press, one side edge of the workpiece is gripped by a workpiece clamp member, and the workpiece is moved and positioned. For this reason,
The area around the workpiece clamp member becomes a desoto zone that cannot be machined, and this dead zone is either discarded as green phase or
The desoto zone is avoided by changing the grip of the clamp member.

Furthermore, the current situation is that machining is performed while taking into account the arrangement of the molds and avoiding dead zone areas from the beginning.

(Problem to be solved by the invention) By the way, when punching is performed using the conventional turret punch press mentioned above, a processing dead zone occurs, resulting in poor workpiece yield. The area is divided into two areas, and workers perform processing while checking each time. If this confirmation work is neglected, the clamp member may be punched out.

In order to avoid machining dead zones, it takes a lot of manpower and time to regrip the clamp member for machining.Especially when the workpiece is short on the clamp side or there is a notch on the clamp side, it is difficult to grip the clamp member. Since it could not be replaced or processed automatically, it was thrown away as raw material. In addition, in order to avoid the machining dead zone, it is possible to use a clamp positioner, repositioning, special clamp, etc., but this has the problem of complicating and requiring large equipment, which increases equipment costs.

As mentioned above, there was the problem that all stations of the mold could not be used to their full potential, and that confirmation work was required, making it impossible to improve productivity.

The purpose of this invention is to improve the above-mentioned problems with a turret punch press that changes the position of the workpiece during processing, eliminates the processing dead zone, improves the yield, and simplifies and saves labor for the cutting program. The purpose of the present invention is to provide a processing method.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention includes an upper turret equipped with a large number of upper molds, and a large number of lower molds facing the upper molds. The lower turret with the mold attached is rotatably provided,
A turret punch press that includes a drive member and a fixed holding device that simultaneously rotates the upper and lower rotary molds located at symmetrical positions in the upper and lower turrets in the same direction and the same angle, and that can freely control the ram position. This is a processing method in a turret punch press in which the upper and lower rotary molds are rotated in a punching state to change the position of the workpiece.

(Function) By adopting the processing method in the turret punch press of this invention, the upper and lower rotary molds are rotated while the workpiece is being pressed between the upper and lower rotary molds in the punching state. let

For example, by performing punching up to the vicinity of the machining dead zone, then rotating the workpiece 180 degrees and performing machining again, the machining dead zone can be eliminated and the yield can be improved.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

Referring to FIG. 9, the turret punch press 1 has an upper frame 9 supported by side frames 5.7 erected on both sides of the base 3, forming a concave shape. On the lower surface of the upper frame 9, a disk-shaped upper turret 13 having a large number of upper molds 11 mounted thereon is rotatably mounted via an upper rotating shaft 15.

Further, on the upper surface of the base 3, a lower turret 19 is mounted rotatably by a lower rotating shaft 21, and a plurality of lower molds 17 facing each upper mold 11 are mounted thereon.

A ram 23 is provided on the lower surface of the upper frame 9 so as to be movable up and down, and the upper and lower molds 11 and 17 are located directly below the ram 23.

With the above configuration, the upper turret 13 and the lower turret 19 are synchronously rotated in the same direction by servo motors (not shown) mounted within the base 3 and the upper frame 9. The upper and lower molds 11.degree. 17 mounted on the upper turret 13 and the lower turret 19 are indexed and positioned directly below the ram 23, and a desired punching process is performed on the workpiece W.

Guide rails 25 extending in the left-right direction in FIG. 9 are provided on the front and rear surfaces near the top surface of the base 3.
is movably supported. The movable tables 27 are located on both sides of the fixed table 29 fixed on the base 3, and each movable table 27 is integrated with the first carriage 31 extending in the front and rear direction while straddling the two fixed tables. It is connected to each other.

A second carriage 33 is mounted on the first carriage 31 and is movable in the front-rear direction perpendicular to the moving direction of the movable table 27. A plurality of clamp devices 35, which can grip the side edges, are attached so as to be adjustable in position in the front-rear direction.

With the above configuration, one end of the workpiece W is gripped by the plurality of clamping devices 35, and the first carriage 31 or the clamping device 3 is moved to a desired punching position by numerical control.
The movement and positioning of the workpiece W is determined by the position control in step 5.

As shown in FIGS. 10 and 11, upper rotary mold holders 37a, which are rotatable with respect to the upper turret 13, are provided at appropriate locations (symmetrical positions in this embodiment) on the upper surface of the upper turret 13. 37b is rotatably mounted.

The upper rotary mold holders 37a and 37b are interlocked and connected to rotate in conjunction with a first interlocking member 39 that extends in the radial direction and is rotatably attached to the upper turret 13.

The lower turret 19 also has an upper rotary mold holder 37.
The lower rotary mold holder 41 is placed at the position corresponding to a and 37b.
a 41b is rotatably attached to the lower turret 19, and these lower rotary mold holders 41a, 41b are interlocked with a second interlocking member 43 that extends in the radial direction and is rotatably attached to the lower turret 19. It is interlocked and connected so that it rotates.

The configurations of the first interlocking member 39 and the second interlocking member 43 are almost the same, and both ends of each are the upper turret 13 and the lower turret! It protrudes slightly from the outer peripheral edge of No. 9 in the radial direction. The end of the first interlocking member 39 can be freely engaged with the end of the first transmission shaft 47 of the upper transmission device 45 mounted on the upper frame 9, and the end of the second interlocking member 43 can be engaged with the end of the first transmission shaft 47 of the upper transmission device 45 mounted on the upper frame The second in the lower transmission device 49 attached to
It can freely engage with the end of the transmission shaft 51.

The upper and lower transmission devices 45 and 49 have a similar construction, and are each operatively connected to a rotary drive device 55 using, for example, a servo motor 53 as a drive source.

Further, a fixing and holding device 57 is attached to a portion of the first conduction shaft 47, and is capable of preventing rotation of the first conduction shaft 47 and holding the first conduction shaft 47 in a fixed state. The fixing and holding device 57 is composed of, for example, an electromagnetic or mechanical brake device, and its details will be omitted.

Further, a brake ring 61 is integrally attached to an appropriate position of the connecting shaft 59 in the first interlocking member 39, and the brake ring 61 can be clamped and fixed at a position corresponding to the brake ring 61 of the upper turret 13. A fixed holding device 63 is attached. This fixing/holding device 63 serves to prevent the first interlocking member 39 and the upper rotary mold holders 37a, 37b from rotating due to vibration etc. by clamping and fixing the brake link 61. Pressing cylinder 65a that releases the clamping of 61
, 65b are provided at symmetrical positions on the upper frame 9.

Note that the second interlocking member 43 also has the first interlocking member 39 described above.
A fixed holding device 6''''3 is provided, and the configuration thereof is the same, so the same reference numerals are given and the explanation will be omitted.

With the above configuration, after the upper and lower molds 11 and 17 to be rotated with respect to the upper and lower turrets 13 and 19 are indexed directly below the ram 23, the ends of the first interlocking member 39 and the first transmission shaft are rotated. 4
Similarly, the end of the second interlocking member 43 is engaged with the end of the second transmission shaft 5 by operating a fluid pressure cylinder (not shown).
1.

Thereafter, by loosening the fixed holding devices 57 and 63 and rotating the rotational drive device 55, the upper rotary mold 37
a, 37b and the lower rotary molds 41a, 41b are simultaneously rotated in the same direction, and their angular positions relative to the upper and lower turrets 13, 19 can be changed. After setting the angular position, 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 drive of the ram 23, as shown in FIG. 12, the cylinder device 67 has a piston 71 within the cylinder body 69, and the ram 23 extending downward is integrally provided on the piston 71. It is being Immediately below this ram 23, an upper mold 11 mounted on the upper turret 13 and a lower mold 17 mounted on the lower turret 19 are set. The upper mold 11 is inserted into the upper mold holder 73, the reference numeral 75 is a stripper spring for stripping the upper mold 11 from the plate material W, and the reference numeral 77 is a lift spring that urges the temporary press part 79 to the plate material W. be.

The hydraulic circuit 81 includes a hydraulic pump OP, an upper cylinder chamber and a lower cylinder chamber of the cylinder body 69, and piping OL.
It is configured with a servo valve 83 connected via I and OL2. The pipe OLI is provided with a pressure detector 85 that detects the oil pressure of the pipe OL1 using an electrical signal.

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

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

The NC data input unit 89 is connected offline or online to, for example, CAD and CAM.
Receives each NC data for controlling the turret punch press 1 from the CAM, and sends this NC data to the main controller 9.
1 is provided.

Although not shown, the main control section 91 stores information on a machining speed pattern storage section, for example, various machining speed patterns corresponding to the material and thickness of the plate material W.

The main control unit 91 is operated by an operating system,
It receives and receives NC data from the NC data manual section 89, and mainly controls the position of the plate W and the drive of the cylinder device 67. Further, the main control section 91 is connected to various sensors, limit switches, and other various actuators, and controls the turret punch press 1 in an overall manner.

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

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

The cylinder device 67 is operated by the above-mentioned control means,
The upper die 11 and the lower die 17 cooperate to perform a predetermined punching process on the plate material W. Furthermore, since it is possible to control the position of the ram 23 of the cylinder device 67, the cylinder device 67 It is possible to stop the

Punching is performed on the workpiece W using the turret punch press 1 having the above-mentioned configuration, and a method for avoiding machining dead marks will be described with reference to FIGS. 1 to 6.

Referring to FIG. 1, one side edge of the work W is gripped by a clamp device t35, and normal processing is performed from the tip (-Y side) of the work W. However, the portion gripped by the clamp device 35 (the shaded portion in the figure) becomes a machining dead zone E.

When the size of the workpiece W is small, the workpiece is machined close to the machining dead zone E, as shown in FIG. 2(A). In other words, processing is performed even to the part that does not fall within the override area.

If the size of the workpiece W is large, the workpiece is machined to the position where the radius of rotation of the workpiece W is the smallest, that is, to the center of the workpiece W, as shown in FIG. 2(B).

(In the figure, the machined holes are shown by solid lines, and the unprocessed holes are shown by dotted lines.) Then, as shown in Fig. 3, at the position where the rotation radius of the workpiece W is the smallest,
That is, the first interlocking member 39 and the second interlocking member 4 described above
The upper mold 11 and the lower mold 17 (
The punching process is performed in cooperation with a rotating mold. Then, the grip of the clamp device 35 is released and the first carrier 31 is retreated.

Note that when the upper die 11 and the lower die 17 cooperate to perform the punching process, the above-mentioned control means, that is, the position control of the ram 23 of the clamping device 67, is used to control the workpiece W while it is being processed. The mold 11 is inserted into the lower mold 17 and presses and holds the workpiece W in a penetrating state. (See Fig. 4) Accordingly, as shown in Fig. 5, the first interlocking member 39 and the second
The interlocking member 43 is rotated to rotate the upper rotary mold holder 37 and the lower rotary mold holder 41 by 180 degrees. Work W
When the workpiece W is rotated 180 degrees, the state shown in FIG.
, and process the unprocessed part of the processing dead zone E and the remaining part. Note that the upper mold 1 is attached to the workpiece W.
Since the workpiece W is rotated with the mold holder 1 stuck in, the workpiece W can be rotated by the upper mold 11 in addition to the frictional force between the upper rotary mold holder 37a and the lower mold 17, so that the rotation accuracy can be improved. can.

With the above-described processing method, the upper mold 11 and the lower mold 17 can be rotated by auto-indexing, the rotation angle of 180 degrees can be easily determined, and the upper mold 11 can be held in a state inserted into the workpiece W. .

Therefore, using these operations, it is possible to rotate the workpiece W automatically, eliminating machining dead zones and improving yield, as well as simplifying the cannibalization program and eliminating tasks such as override confirmation. Labor saving is achieved, and furthermore, malfunctions such as clamp punching can be avoided.

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

That is, by changing the angle of the workpiece W shown in FIG. 7(A) in various ways, (B-1) and (B-2) in FIG.
), (B-3) Change the position of the workpiece W as shown in the figure,
It is possible to change the abutting reference surface for processing. In addition, in the figure (
a), (b), and (C) indicate each side of the workpiece W.

Also, large pieces of water can be transported out of the machine without using the scrap shooter. Figure 8(A).

Referring to (B), the large piece S is pressed between the upper mold 11 and the lower mold 17, rotated 90 degrees, and sent to the pipe roller conveyor 97, etc., and the large piece S is placed outside the machine. Carry it out.

It should be noted that the present invention is not limited to the embodiments described above, but can be implemented in other embodiments 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 rotary molds located at symmetrical positions of the upper and lower turrets are simultaneously rotated in the same direction. Using a turret punch press that can be rotated by many angles and whose ram position can be controlled, the position of the workpiece is changed by rotating the upper and lower rotary molds in a punched state.

For this reason, we aim to eliminate the machining dead zone of the workpiece, improve the yield, and simplify and save labor for the cannibalization program.In addition, we aim to eliminate the processing dead zone of the workpiece, and to simplify and save labor. etc. was made possible.

[Brief Description of the Drawings] Figures 1 to 6 show a method of avoiding a machining dead zone according to the present invention. Figure 1 is an explanatory diagram showing a machining dead zone, and Figures 2 (A) and (B) are Fig. 3 is an explanatory drawing showing the processing range according to the size of the hole, Fig. 4 is an explanatory drawing showing the punching processing state, Fig. 5 is an explanatory drawing of the rotation state, Fig. 6 FIG. 2 is an explanatory diagram showing a re-clamped state. 7 and 8 show other embodiments, and FIG. 7(A)
, (B-1), (B-2), and (B-3) are explanatory diagrams of the form in which the abutment is set to the clamp or locator pin of the workpiece, and FIG. 8 (A). (B) is an explanatory diagram of the operation when carrying out a large piece of water. FIG. 9 is a side view of a turret punch press according to an embodiment of the present invention, and FIG.
- An enlarged plan view along the X-ray, FIG. 11 is an enlarged side view of 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 mold 13-. Upper turret 17.-
Lower mold 19 Lower turret 23... Rams 37a, 37b Upper rotating mold holder 39/First interlocking members 41a, 41b... Lower rotating mold holder 43... Second interlocking member 45... Upper transmission device 49 ... Lower transmission device 55 ... Rotation drive device 57 ... Fixed holding device 63 ... Fixed holding device 81 ... Hydraulic circuit
87...NC device 1-Turret punch press 11...1 Gold 12 13...Upper turret 17
...Lower mold 19...Lower turret 23...Ram 37, 37b-Upper rotating mold holder 39...First interlocking member 4111.41b...Lower rotating mold holder 43...
Second interlocking member 45... Upper transmission 1lW49... Lower transmission device 55... Rotation drive device 57... Fixed holding device 63... Fixed holding device 81... Hydraulic circuit
8F...NCll1fFigure 3Figure 4 Figure 12 (A) Figure 2 (B) (A) (B-1) (B-2) (B-3) Figure 7Figure 8

Claims (1)

[Claims] An upper turret equipped with a large number of upper molds and a lower turret equipped with a large number of lower molds facing the upper mold are rotatably provided, and the upper turret and the lower turret are located at symmetrical positions. In a turret punch press that is equipped with a drive member and a fixed holding device that simultaneously rotates the upper and lower rotary molds in the same direction and the same angle, and that can freely control the ram position, the upper and lower rotary molds are rotated during punching processing. A processing method in a turret punch press that is characterized by rotating a die and changing the position of a workpiece.