CN111070320B

CN111070320B - Automatic feeding, cutting and sorting device and method for strain gauge

Info

Publication number: CN111070320B
Application number: CN201911236956.0A
Authority: CN
Inventors: 冯驰; 曹超; 杨超群
Original assignee: Avic Testing Instrument Xi'an Co ltd
Current assignee: Avic Testing Instrument Xi'an Co ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2021-08-17
Anticipated expiration: 2039-12-05
Also published as: CN111070320A

Abstract

The invention discloses an automatic feeding, cutting and sorting device and method for a strain gauge, wherein the device comprises a punch, automatic sorting devices arranged on the front side and the rear side of the punch, and an automatic feeding device arranged in front of a workbench; the automatic feeding device conveys the full-page strain gauge through the universal ball guide rail; the automatic sorting device comprises a cylinder assembly arranged on the linear module, the cylinder assembly comprises a bottom pneumatic sliding table arranged on the linear module, and an upper pneumatic sliding table arranged on the bottom pneumatic sliding table; the clamping jaw air cylinder mounting plates are fixed on two sides of the upper-layer pneumatic sliding table, the clamping jaw air cylinder is mounted on the outer side of the clamping jaw air cylinder mounting plate, and clamping fingers are mounted on the clamping jaw air cylinder; the frame pushing cylinder is arranged on the upper-layer pneumatic sliding table and is positioned between the two clamping jaw cylinder mounting plates. The full-page strain gauge can automatically convey the full-page strain gauge and tear off the frame of the full-page strain gauge, and an operator does not need to put a cutting die into a punch press by bare hands, so that potential safety hazards are avoided, and the working efficiency is improved.

Description

Automatic feeding, cutting and sorting device and method for strain gauge

Technical Field

The invention belongs to the technical field of mechanical automation equipment, and particularly relates to an automatic feeding, cutting and sorting device and method for a strain gauge.

Background

The strain gauge is a very widely applied precision detection sensing unit in the field of processing and manufacturing at present, and is widely applied to the fields of physical quantity measurement, environmental quantity control, intelligent identification and the like. Under the current production process, the smallest production unit of the strain gauge is an entire strain gauge formed by arranging hundreds of strain gauges in order, so that the entire strain gauge needs to be cut and sorted after production is finished. The traditional cutting and sorting method is to manually operate a punch press to punch the whole strain gauge to obtain a useful strain gauge to be detected and useless frame waste of the whole strain gauge, and then manually collect the useful strain gauge to be detected and clean the useless frame waste of the whole strain gauge. The manual operation mode is low in production efficiency, and the useful strain gauges to be detected are easily mixed into useless frame waste materials of the whole strain gauges in the sorting process and are cleaned together, so that unnecessary waste is caused. More importantly, when the manual operation is carried out, the manual operation and the punch press must be frequently interacted, so that great potential safety hazards exist. Therefore, the development of an automatic strain gauge feeding, cutting and sorting device capable of replacing manual operation is urgent.

Disclosure of Invention

The invention aims to provide an automatic feeding, cutting and sorting device and method for a strain gauge, and aims to solve the problems in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

an automatic feeding, cutting and sorting device for a strain gauge comprises a punch, wherein an automatic sorting device is respectively arranged on the front side and the rear side of a workbench of the punch, the automatic sorting device comprises an automatic sorting device profile frame fixedly connected with the workbench, and the automatic feeding device is arranged on the automatic sorting device profile frame in front of the workbench;

the automatic feeding device comprises two conveying units, wherein each conveying unit comprises a guide rod cylinder and a universal ball guide rail, the guide rod cylinders are arranged on the section frame of the automatic sorting device, and the universal ball guide rails are arranged on the inner sides of the guide rod cylinders; two ends of the cutting die are respectively placed on the two universal ball guide rails and used for bearing the full-page strain gauge, and a cutting die push rod is connected between the guide rod cylinders of the two conveying units and used for pushing the cutting die;

the automatic sorting device comprises a linear module and a cylinder assembly, wherein the linear module is arranged on a profile frame of the automatic sorting device through a module mounting plate, and the cylinder assembly is fixed on the linear module; the air cylinder assembly comprises a bottom pneumatic sliding table arranged on the linear module through a module adapter plate, and an upper pneumatic sliding table arranged on the bottom pneumatic sliding table through a pneumatic sliding table adapter plate; the clamping jaw air cylinder mounting plate is fixed on the upper-layer pneumatic sliding table, the clamping jaw air cylinder is mounted on the outer side of the clamping jaw air cylinder mounting plate, and clamping fingers are mounted on the clamping jaw air cylinder; the clamping jaw air cylinder mounting plate is U-shaped, and the frame pushing air cylinder is mounted in a U-shaped groove of the clamping jaw air cylinder mounting plate.

Further, a lower die assembly is fixed on the workbench and comprises a lower template; a V-shaped strip is fixed on one side of the lower template, and a positioning pin is fixed on the other side of the lower template; the cutting die is provided with a V-shaped groove matched with the V-shaped strip and a groove matched with the positioning pin for positioning.

Furthermore, the cutting die is provided with vent holes corresponding to each single strain gauge of the full-page strain gauges; the lower template is provided with a negative pressure hole matched with the vent hole on the cutting die.

Further, a frame waste collecting cylinder is arranged below the workbench.

Further, an upper die assembly is arranged above the workbench, and a gas-liquid pressure cylinder is arranged above the upper die assembly.

Furthermore, a guide rod cylinder protective cover is arranged outside the guide rod cylinder, and the universal ball guide rail is arranged outside the guide rod cylinder protective cover.

Furthermore, a groove along the direction of the clamping finger is arranged on the cutting die, and the groove is opposite to the frame of the full-page strain gauge.

Further, the cylinder assembly is communicated with the supercharging device through a gas path drag chain.

Furthermore, the two guide rod cylinders are arranged in parallel in the direction opposite to the punch press.

The working method of the automatic feeding, cutting and sorting device comprises the following steps: the full-page strain gauge is arranged on a cutting die, the cutting die is driven by a guide rod cylinder and is fed into a punching station of a punch press to be punched under the guidance of a universal ball guide rail; after the blanking is completed, the punch press keeps the extrusion state, the air cylinder assembly arranged on the module adapter plate rises under the driving of the straight line module, then the bottom layer pneumatic sliding table and the upper layer pneumatic sliding table stretch out in succession, so that the clamp fingers clamp the frame of the full-page strain gauge, and the bottom layer pneumatic sliding table and the upper layer pneumatic sliding table retract in succession, so that the clamp fingers tear the frame of the full-page strain gauge from the cutting die.

Compared with the prior art, the invention has the following beneficial effects:

1. when the automatic feeding, cutting and sorting device for the strain gauges is used for cutting, the full-page strain gauges installed on the cutting die are driven by the air cylinder to slide into the position right below the punch (punching station of the punch) on the universal ball guide rail, so that the situation that an operator puts the cutting die into the punching station right below the punch by hands is avoided, and potential safety hazards are avoided;

2. after the cutting die of the automatic feeding, cutting and sorting device for the strain gauges is pushed onto a punch press workbench by the air cylinder, the final position of the cutting die needs to be strictly controlled, and therefore the V-shaped strip and the pin are designed to act together to position the cutting die. After the cutting die is separated from the universal ball guide rail and enters the punch press workbench, the V-shaped strip can play the role of the guide rail, is guided in the advancing direction of the cutting die, prevents the position of the cutting die from deviating, and can also play a role in final positioning under the combined action of the cutting die and the pin;

3. according to the automatic loading, cutting and sorting device for the strainometers, the negative pressure adsorption device is arranged on the punch press workbench below the cutting die, vent holes are formed in the cutting die and correspond to the lower parts of the single strainometers of the whole strainometers, negative pressure can accurately adsorb the single strainometers cut into parts through the vent holes, and the strainometers are guaranteed not to be influenced to change positions in the whole cutting and sorting process, so that the automatic transfer station in the next step can conveniently carry out integral transfer on the single strainometers which are cut, and the full automation of the whole process is realized;

4. the automatic sorting device of the automatic feeding, cutting and sorting device for the strain gauge is formed by combining the module and the double-layer cylinder assembly, and the whole structure is simple and compact. The double-layer cylinder assembly is formed by connecting two cylinder sliding tables through the adapter plate, so that the effective working length is doubled under the condition that the retraction length of the cylinder is not changed;

5. according to the automatic sorting mechanism of the automatic loading, cutting and sorting device for the strain gauges, the whole strain gauge frame waste material is torn, the sorting effect is completed, meanwhile, the frame waste material can be collected and collected in the collecting frame below the punch press workbench in a centralized manner, and the subsequent operators can clean the frame waste material conveniently.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic perspective view of an automatic feeding, cutting and sorting device with strain gauges according to the present invention;

FIG. 2 is a schematic structural diagram of an automatic feeding device of the automatic feeding, cutting and sorting device of the strain gauge;

FIG. 3 is an enlarged view of the structure at A in FIG. 2;

FIG. 4 is a schematic diagram of the structure of a punching machine of the automatic feeding, cutting and sorting device of the strain gauge of the invention;

FIG. 5 is a schematic structural view of a lower die assembly of the automatic loading, cutting and sorting device of the strain gauge;

FIG. 6 is a schematic view of a cutter die structure of the automatic feeding, cutting and sorting device of the strain gauge of the present invention;

FIG. 7 is a schematic structural diagram of an automatic sorting device of the automatic loading, cutting and sorting device of the strain gauge of the present invention;

FIG. 8 is a schematic view of a cylinder assembly of the automatic loading, cutting and sorting device of the strain gauge of the present invention;

FIG. 9 is a front view of a cylinder assembly of the automatic loading, cutting and sorting apparatus of the strain gage of the present invention;

in the figure, 1 automatic sorting device, 2 automatic feeding device, 3 punches, 4 guide rod cylinders, 5 guide rod cylinder shields, 6 universal ball guide rails, 7 cutting die push rods, 8 cutting dies, 9 full-page strainometers, 10 'V' -shaped strips, 11 lower templates, 12 positioning pins, 13 gas-liquid pressure cylinders, 14 upper die assemblies, 15 lower die assemblies, 16 punch workbenches, 17 frame waste collecting barrels, 18 automatic sorting device section bar frames, 19 module mounting plates, 20 gas circuit tow chains, 21 linear modules, 22 module adapter plates, 23 bottom pneumatic sliding tables, 24 pneumatic sliding table adapter plates, 25 upper pneumatic sliding tables, 26 clamping jaw cylinder mounting plates, 27 push frame cylinders, 28 clamping jaw cylinders, 29 clamping fingers and 30 grooves.

Detailed Description

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The following detailed description is exemplary in nature and is intended to provide further details of the invention. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention.

As shown in fig. 1, 2, 7 and 8, an automatic feeding, cutting and sorting device for strain gauges comprises a punch press 3, wherein an automatic sorting device 1 is respectively installed on the front side and the rear side of a workbench 16 of the punch press 3, the automatic sorting device 1 comprises an automatic sorting device profile frame 18 fixedly connected with the workbench 16, and an automatic feeding device 2 is installed on the automatic sorting device profile frame 18 in front of the workbench 16; the automatic feeding device 2 comprises two conveying units, wherein each conveying unit comprises a guide rod cylinder 4 arranged on a section bar frame 18 of the automatic sorting device and a universal ball guide rail 6 arranged on the inner side of the guide rod cylinder 4; two ends of a cutting die 8 are respectively placed on the two universal ball guide rails 6 and used for bearing the whole strain gauges 9, and a cutting die push rod 7 is connected between the guide rod cylinders 4 of the two conveying units and used for pushing the cutting die 8; the automatic sorting device 1 comprises a linear module 21 and a cylinder assembly, wherein the linear module 21 is installed on the automatic sorting device profile frame 18 through a module installation plate 19, and the cylinder assembly is fixed on the linear module 21; the air cylinder assembly comprises a bottom layer pneumatic sliding table 23 arranged on the linear module 21 through a module adapter plate 22, and an upper layer pneumatic sliding table 25 arranged on the bottom layer pneumatic sliding table 23 through a pneumatic sliding table adapter plate 24; a clamping jaw air cylinder mounting plate 26 is fixed on the upper-layer pneumatic sliding table 25, a clamping jaw air cylinder 28 is mounted on the outer side of the clamping jaw air cylinder mounting plate 26, and clamping fingers 29 are mounted on the clamping jaw air cylinder 28; clamping jaw cylinder mounting panel 26 is the U-shaped, pushes away frame cylinder 27 and installs in clamping jaw cylinder mounting panel 26's U-shaped inslot. And a guide rod cylinder shield 5 is arranged outside the guide rod cylinder 4, and the universal ball guide rail 6 is arranged outside the guide rod cylinder shield 5. The cylinder assembly is communicated with a supercharging device through an air path drag chain 20. The two guide rod cylinders 4 are arranged in parallel in the direction opposite to the punch 3.

As shown in fig. 3, 5 and 6, the lower die assembly 15 is fixed on the worktable 16, and the lower die assembly 15 comprises a lower template 11; a V-shaped strip 10 is fixed on one side of the lower template 11, and a positioning pin 12 is fixed on the other side of the lower template; the cutting die 8 is provided with a V-shaped groove matched with the V-shaped strip 10 and a groove matched with the positioning pin 12 for positioning. The cutting die 8 is provided with vent holes corresponding to each single strain gauge of the full-page strain gauges 9; the lower template 11 is provided with a negative pressure hole matched with the vent hole on the cutting die 8. The cutting die 8 is provided with a groove 30 along the direction of the clamping finger 29, and the groove 30 is over against the frame of the full-page strain gauge 9.

As shown in fig. 4, a frame waste collecting cylinder 17 is arranged below the working table 16. An upper die assembly 14 is arranged above the workbench 16, and a gas-liquid pressure cylinder 13 is arranged above the upper die assembly 14.

The working method of the invention is as follows:

when the device works, the automatic feeding device 2 is in a retraction state, the cutting die 8 is positioned at one end of the universal ball guide rail 6 far away from the punch press 3, the whole strain gauge 9 to be cut is installed on the cutting die 8 by an operator, then the start button is pressed, the two symmetrical guide rod cylinders 4 work simultaneously, the cutting die 8 is pushed to move on the universal ball guide rail 6 through the cutting die push rod 7 in the automatic feeding device 2, the universal ball guide rail 6 provides smooth rolling for the cutting die 8 and also restricts the movement direction of the cutting die 8, the cutting die 8 is ensured to be smoothly pushed onto the punch press lower template 11, and the V-shaped groove of the cutting die 8 is inserted into the V-shaped strip 10 installed on the punch press lower template 11. The cutting die push rod 7 continues to push the cutting die 8 to move, the V-shaped strip 10 on the lower template 11 restrains the movement of the cutting die 8 on the lower template 11, and the final position of the cutting die 8 is accurately limited by matching with the positioning pin 12 on the lower template 11. The guide rod cylinder 4 is still in a pressing state at this time, so that the position of the cutting die 8 on the lower die plate 11 is firmly limited, and the cutting die 8 is prevented from being forced to move during punching of the punch press 3. In the whole automatic feeding process, the universal ball guide rail 6 preliminarily limits the movement of the cutting die 8, after the cutting die 8 is inserted into the V-shaped strip 10, the V-shaped strip 10 accurately limits the movement of the cutting die 8, and the cutting die 8 is firmly limited in the punching range of the punch press 3 by matching with the pressure of the positioning pin 12 and the guide rod cylinder 4, so that the punch press 3 is waited to cut the cutting die. After the cutting die 8 is in place, the punch 3 immediately performs cutting operation, after the cutting operation is completed, the punch 3 still maintains a punching state, the automatic sorting device 1 needs to tear the frame waste of the whole strain gauge 9, at this time, the linear module 21 mounted on the automatic sorting device profile frame 18 through the module mounting plate 19 works to drive the module adapter plate 22 and the pneumatic element (shown in fig. 7) mounted thereon to rise to a certain height, and at this time, the center plane of the paired clamp fingers 29 is as high as the frame waste of the whole strain gauge 9. Then the bottom pneumatic sliding table 23 and the upper pneumatic sliding table 25 act simultaneously to drive the clamping jaw air cylinder mounting plate 26 to move towards the frame waste material direction of the whole strain gauge 9, when the bottom pneumatic sliding table 23 and the upper pneumatic sliding table 25 move to the full stroke, the clamping fingers 29 extend into the proper positions of the frame waste materials of the whole strain gauge 9, and the frame waste materials of the whole strain gauge 9 are positioned on the central surface of the clamping fingers 29, at the moment, the clamping jaw air cylinder 28 acts to knead the paired clamping fingers 29 to clamp the frame waste materials of the whole strain gauge 9, then the bottom pneumatic sliding table 23 and the upper pneumatic sliding table 25 retract simultaneously, power is transmitted through a series of transmission to the clamping fingers 29, and acts together with the kneading force of the clamping fingers 29 to tear the frame waste materials of the whole strain gauge 9 off the cutting die 8. After the frame waste of the whole-plate strain gauge 9 is successfully torn off, the linear module 21 moves to drive the module adapter plate 22 and the pneumatic elements mounted on the module adapter plate and the frame waste of the whole-plate strain gauge 9 to fall to a certain height, then the bottom pneumatic sliding table 23 and the upper pneumatic sliding table 25 extend out simultaneously, when the bottom pneumatic sliding table 23 and the upper pneumatic sliding table 25 move to a full stroke, the pneumatic sliding table is just above the frame waste collecting cylinder 17 below the punch press 3, as shown in fig. 3, the clamping fingers 29 are loosened at the moment, the frame pushing cylinder 27 extends out, the frame waste of the whole-plate strain gauge 9 is pushed out from the clamping fingers 29, the frame waste of the whole-plate strain gauge 9 drops into the frame waste collecting cylinder 17, then all the cylinders retract in sequence, and the equipment completes work.

The working principle of the invention is as follows: when the full-page strain gauge 9 needs to be cut and sorted, an operator only needs to mount the full-page strain gauge 9 on the cutting die 8, the cutting die 8 is driven by the guide rod cylinder 4, the cutting die is conveyed to a punching station of a punching machine under the guidance of the universal ball guide rail 6, then the operator presses a start button, and the punching machine 3 punches the full-page strain gauge 9. After blanking, the punch 3 keeps the extrusion state, the cylinder arranged on the module adapter plate 22 is driven by the straight line module 21 to rise to a certain position, then the pneumatic sliding table extends out successively, so that the clamping finger 29 at the front end of the clamping jaw cylinder 28 extends into the groove 30 on the cutting die 8, and at the moment, the central plane of the clamping finger 29 is just positioned in the frame of the full-page strain gauge 9; when clamping jaw cylinder 28 presss from both sides tightly, make press from both sides the back that indicates 29 cliied the strainometer frame, pneumatic slip table retracts in succession, make press from both sides and indicate 29 to tear the strainometer frame off from cutting die 8 and take off, straight line module 21 descends to punch press workstation 16 below again, pneumatic slip table stretches out in succession, clamping jaw cylinder 28 loosens, push away frame cylinder 27 and stretch out, make the frame waste material drop to in the frame waste material collecting cylinder 17 from pressing from both sides indicating 29, can prevent like this that the frame waste material from leaving over on the lower bolster 11, influence follow-up punch press 3 to the blanking of full version strainometer 9. Negative pressure adsorption equipment has been arranged on the lower bolster 11 of cutting die 8 below, it has the air vent all to design to correspond every monolithic strainometer below full page strainometer 9 on cutting die 8, the negative pressure can be adsorbed through the accurate monolithic strainometer that will cut into the scatter in these holes, ensure that the strainometer is whole to be cut, the letter sorting in-process can not influenced and change position, automatic transfer station that like this can make things convenient for on next step carries out holistic transportation to the monolithic strainometer that cuts the completion, realize the full automatization of whole process. In the process, the operator only interacts with the punch 3 once and does not enter the punching range of the punch 3, so that the safety of the operator is ensured.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.

Claims

1. A working method of an automatic feeding, cutting and sorting device of a strain gauge is characterized in that,

automatic feeding cut sorting device include: the automatic sorting device comprises a punch (3), wherein an automatic sorting device (1) is respectively arranged on the front side and the rear side of a workbench (16) of the punch (3), the automatic sorting device (1) comprises an automatic sorting device profile frame (18) fixedly connected with the workbench (16), and an automatic feeding device (2) is arranged on the automatic sorting device profile frame (18) in front of the workbench (16);

the automatic feeding device (2) comprises two conveying units, wherein each conveying unit comprises a guide rod cylinder (4) arranged on a section frame (18) of the automatic sorting device and a universal ball guide rail (6) arranged on the inner side of the guide rod cylinder (4); two ends of a cutting die (8) are respectively placed on the two universal ball guide rails (6) and used for bearing the whole strain gauge (9), and a cutting die push rod (7) is connected between the guide rod cylinders (4) of the two conveying units and used for pushing the cutting die (8);

the automatic sorting device (1) comprises a linear module (21) which is arranged on the automatic sorting device profile frame (18) through a module mounting plate (19), and a cylinder assembly which is fixed on the linear module (21); the air cylinder assembly comprises a bottom layer pneumatic sliding table (23) arranged on the linear module (21) through a module adapter plate (22), and an upper layer pneumatic sliding table (25) arranged on the bottom layer pneumatic sliding table (23) through a pneumatic sliding table adapter plate (24); a U-shaped clamping jaw air cylinder mounting plate (26) is fixed on the upper-layer pneumatic sliding table (25), a clamping jaw air cylinder (28) is mounted on the outer side of the clamping jaw air cylinder mounting plate (26), and clamping fingers (29) are mounted on the clamping jaw air cylinder (28); the frame pushing cylinder (27) is arranged in a U-shaped groove of the clamping jaw cylinder mounting plate (26);

the working method comprises the following steps: the full-page strain gauge (9) is arranged on a cutting die (8), the cutting die (8) is driven by a guide rod cylinder (4) and is fed into a punching station of a punch press (3) to punch under the guidance of a universal ball guide rail (6); after blanking is completed, the punch (3) keeps the extrusion state, the cylinder assembly arranged on the module adapter plate (22) is driven by the straight line module (21) to ascend, then the bottom layer pneumatic sliding table (23) and the upper layer pneumatic sliding table (25) extend out in succession, the clamping finger (29) is made to clamp the frame of the whole strain gauge (9), the bottom layer pneumatic sliding table (23) and the upper layer pneumatic sliding table (25) retract in succession, and the clamping finger (29) is made to tear the frame of the whole strain gauge (9) from the cutting die (8).

2. Working method according to claim 1, characterized in that a lower die assembly (15) is fixed on a table (16), said lower die assembly (15) comprising a lower template (11); a V-shaped strip (10) is fixed on one side of the lower template (11), and a positioning pin (12) is fixed on the other side of the lower template; the cutting die (8) is provided with a V-shaped groove matched with the V-shaped strip (10) and a groove matched with the positioning pin (12) for positioning.

3. The working method according to claim 1, characterized in that the cutting die (8) is provided with a vent hole corresponding to each single strain gauge of the full-page strain gauges (9); the lower template (11) is provided with a negative pressure hole matched with the vent hole on the cutting die (8).

4. Working method according to claim 1, characterized in that a frame waste collecting cylinder (17) is arranged under the working platform (16).

5. Working method according to claim 1, characterized in that an upper die assembly (14) is arranged above the working table (16), and a gas-liquid pressurizing cylinder (13) is arranged above the upper die assembly (14).

6. The working method according to claim 1, characterized in that a guide rod cylinder shield (5) is arranged outside the guide rod cylinder (4), and the universal ball guide rail (6) is arranged outside the guide rod cylinder shield (5).

7. The working method according to claim 1, characterized in that the cutting die (8) is provided with a groove (30) along the direction of the clamping finger (29), and the groove (30) is opposite to the frame of the full-page strain gauge (9).

8. The working method according to claim 1, characterized in that the cylinder assembly is connected to a supercharging device by a gas-path drag chain (20).

9. The working method according to claim 1, characterized in that the two guide rod cylinders (4) are arranged in parallel facing the direction of the punch (3).