CN112453465A

CN112453465A - PLC automatic control's perforating device

Info

Publication number: CN112453465A
Application number: CN202011225393.8A
Authority: CN
Inventors: 王岚
Original assignee: Xian Lanxin Industrial Automation Engineering Co Ltd
Current assignee: Xian Lanxin Industrial Automation Engineering Co Ltd
Priority date: 2020-11-05
Filing date: 2020-11-05
Publication date: 2021-03-09

Abstract

The invention discloses a PLC (programmable logic controller) automatic control punching device which comprises a workbench, wherein support columns are fixedly arranged below four corners of the workbench, a support plate is fixedly arranged on one side of the workbench, a top plate is fixedly arranged on the inner wall of the upper end of the support plate, a hydraulic cylinder is fixedly arranged on the top plate, a piston rod of the hydraulic cylinder penetrates through the top plate, an installation plate is fixedly arranged at the lower end of the hydraulic cylinder, a motor is fixedly arranged below the installation plate, a drill bit is fixedly arranged below a rotating shaft of the motor, an infrared distance measuring sensor is fixedly embedded on the installation plate, a limiting device is arranged on the installation plate, and a pressure sensor is fixedly embedded on. Has the advantages that: can utilize the PLC controller to accomplish the automatic operation of punching to the degree of depth that can accurate control punches, the quality of punching is stable, and punches efficiently.

Description

PLC automatic control's perforating device

Technical Field

The invention relates to the field of punching devices, in particular to a PLC (programmable logic controller) automatic control punching device.

Background

A drilling apparatus is a common machining device that drills a workpiece by rotation of a drill. In the casting trade, need to bore a hole to the foundry goods, the precision of drilling directly influences the quality of product, and chinese patent publication stand that patent number is cn201620633321.x is a perforating device, though can block clastic splashing effectively, needs the degree of depth of manual control punching, and not only the degree of depth precision that leads to punching is relatively poor to the stability of the quality of punching is difficult to control, and manual work is efficient in punching moreover.

An effective solution to the problems in the related art has not been proposed yet.

Disclosure of Invention

The invention aims to provide a punching device automatically controlled by a PLC (programmable logic controller) so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a PLC automatic control's perforating device includes the workstation, all fixed support column that is equipped with under four angles of workstation, the fixed backup pad that is equipped with on workstation one side, the fixed roof that is equipped with of backup pad upper end inner wall, the fixed pneumatic cylinder that is equipped with on the roof, the piston rod of pneumatic cylinder runs through roof and lower extreme are fixed and are equipped with the mounting panel, the fixed motor that is equipped with under the mounting panel, the fixed drill bit that is equipped with under the pivot of motor, the fixed infrared distance measuring sensor that inlays on the mounting panel, be equipped with stop device on the mounting panel, the fixed pressure sensor that inlays on the workstation, the fixed loading board that is equipped with on the pressure sensor, be equipped with anchor clamps on the loading board, the fixed PLC controller, display screen and control panel that is equipped with of support arm outer wall, The display screen, the control panel and the hydraulic pump and the electromagnetic directional valve of the hydraulic cylinder are electrically connected with the PLC.

Furthermore, a drill chuck is fixedly mounted at the lower end of the rotating shaft of the motor, and a drill bit is mounted below the drill chuck.

Further, stop device includes first slide bar and first slide cartridge, all fixed being equipped with first slide bar on four angles of mounting panel, the roof is fixed inlay be equipped with quantity be four and with first slide bar assorted first slide cartridge, first slide cartridge slides the cover respectively and establishes to correspond first slide bar outer wall.

Furthermore, the upper end of the first sliding rod is fixedly provided with a limiting block.

Furthermore, all fixed anti-skidding cushion blocks that are equipped with under the support column.

Further, all be fixed with the second slide bar under four angles of loading board, the workstation is fixed inlay be equipped with quantity be four and with second slide bar assorted second slide cartridge, the second slide cartridge slides the cover respectively and establishes correspondingly second slide bar outer wall.

Further, anchor clamps include the end plate, all fixed being equipped with the end plate on the loading board both ends, the end plate middle part is all fixed to be inlayed and is equipped with a screw thread section of thick bamboo, equal threaded connection has the lead screw in the screw thread section of thick bamboo, the fixed horizontal pole that is equipped with of lead screw one end, the fixed cover of lead screw other end outer wall is equipped with the bearing, the bearing is kept away from lead screw one side is all fixed and is equipped with splint.

Further, a drill chuck is fixedly mounted at the lower end of a rotating shaft of the motor, a drill bit is mounted below the drill chuck, the drill chuck is fixedly mounted at the lower end of the rotating shaft of the motor, the drill bit is mounted below the drill chuck, the limiting device comprises a first sliding rod and a first sliding barrel, the first sliding rods are fixedly arranged on four corners of the mounting plate, the top plate is fixedly embedded with four first sliding barrels matched with the first sliding rods, the first sliding barrels are respectively sleeved on the outer walls of the corresponding first sliding rods in a sliding manner, the upper ends of the first sliding rods are respectively fixedly provided with a limiting block, anti-skid cushion blocks are fixedly arranged below the supporting columns, the second sliding rods are fixedly arranged below the four corners of the bearing plate, the workbench is fixedly embedded with four second sliding barrels matched with the second sliding rods, the second sliding barrels are respectively sleeved on the outer walls of the corresponding second sliding rods in a sliding manner, the fixture comprises an end plate, the end plates are fixedly arranged at two ends of the bearing plate, a thread cylinder is fixedly embedded in the middle of the end plate, a lead screw is connected with the thread cylinder in a threaded manner, a cross rod is fixedly arranged at one end of the lead screw, a bearing is fixedly arranged on the outer wall of the other end of the lead screw, and a clamping plate is fixedly arranged on one side of the lead screw.

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

(1) according to the invention, by arranging the workbench, the support columns, the support plate, the top plate, the hydraulic cylinder, the mounting plate, the motor, the infrared distance measuring sensor, the pressure sensor, the bearing plate, the clamp, the PLC, the display screen and the control panel, the PLC can be used for completing automatic punching operation, the punching depth can be accurately controlled, the punching quality is stable, and the punching efficiency is high.

(2) The drill chuck is arranged, so that the drill can be conveniently detached and installed.

(3) According to the invention, by arranging the first slide bar and the first slide cylinder, the mounting plate can move vertically by utilizing the limiting action of the first slide bar and the first slide cylinder, so that the punching quality can be further increased.

(4) The anti-skid cushion block is arranged, so that the anti-skid performance of the lower end of the support column can be improved.

(5) According to the invention, the second slide bar and the second slide cylinder are arranged, so that the bearing plate can not be inclined by utilizing the limiting action of the second slide bar and the second slide cylinder, and the bearing plate can be kept horizontal all the time.

(6) The end plate, the threaded cylinder, the screw rod, the cross rod, the bearing and the clamping plate are arranged, the screw rod can be rotated through the cross rod, so that the clamping plate can be driven to move on the bearing plate to complete clamping and fixing of the workpiece to be machined, and the position of clamping the workpiece to be machined on the bearing plate can be adjusted.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a PLC automatically controlled punching device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a clamp in a PLC automatically controlled punching device according to an embodiment of the present invention.

Reference numerals:

1. a work table; 2. a support pillar; 3. a support plate; 4. a top plate; 5. a hydraulic cylinder; 6. mounting a plate; 7. a motor; 8. a drill bit; 9. an infrared ranging sensor; 10. a pressure sensor; 11. a carrier plate; 12. a PLC controller; 13. a display screen; 14. a control panel; 15. a drill chuck; 16. a first slide bar; 17. a first slide drum; 18. a limiting block; 19. an anti-skid cushion block; 20. a second slide bar; 21. a second slide drum; 22. an end plate; 23. a threaded barrel; 24. a screw rod; 25. a cross bar; 26. a bearing; 27. and (4) clamping the plate.

Detailed Description

The invention is further described with reference to the following drawings and detailed description:

embodiment 1 referring to fig. 1-2, a PLC automatic control punching apparatus according to an embodiment of the present invention includes a workbench 1, support columns 2 are fixedly disposed under four corners of the workbench 1, a support plate 3 is fixedly disposed on one side of the workbench 1, a top plate 4 is fixedly disposed on an inner wall of an upper end of the support plate 3, a hydraulic cylinder 5 is fixedly disposed on the top plate 4, a piston rod of the hydraulic cylinder 5 penetrates the top plate 4, a mounting plate 6 is fixedly disposed at a lower end of the top plate 4, a motor 7 is fixedly disposed under the mounting plate 6, a drill 8 is fixedly disposed under a rotating shaft of the motor 7, an infrared distance measuring sensor 9 is fixedly embedded on the mounting plate 6, a limiting device is disposed on the mounting plate 6, a pressure sensor 10 is fixedly embedded on the workbench 1, a bearing plate 11 is fixedly disposed on the pressure sensor 10, a clamp is disposed on the bearing plate 11, the hydraulic pump and the electromagnetic directional valve of the motor 7, the pressure sensor 10, the infrared distance measuring sensor 9, the display screen 13, the control panel 14 and the hydraulic cylinder 5 are electrically connected with the PLC 12.

According to the scheme of the invention, the PLC 12 can be used for completing automatic punching operation, the punching depth can be accurately controlled, the punching quality is stable, and the punching efficiency is high.

Embodiment 2 on the basis of embodiment 1, as shown in fig. 1, for the motor 7, a drill chuck 15 is fixedly mounted at the lower end of a rotating shaft of the motor 7, a drill bit 8 is mounted below the drill chuck 15, and the drill chuck 15 can facilitate the detachment and installation of the drill bit 8.

Embodiment 3 is based on embodiment 1 and is shown in fig. 1, for the limiting device, the limiting device includes a first slide bar 16 and a first slide cylinder 17, the four corners of the mounting plate 6 are all fixedly provided with the first slide bar 16, the top plate 4 is fixedly embedded with the four first slide cylinders 17 matched with the first slide bar 16, the first slide cylinders 17 are respectively slidably sleeved on the outer walls of the corresponding first slide bars 16, and the mounting plate 6 can move vertically and vertically by using the limiting function of the first slide bars 16 and the first slide cylinders 17, so that the punching quality can be further increased.

Embodiment 4 is based on embodiment 3, as shown in fig. 1, for the first sliding rod 16, the upper end of the first sliding rod 16 is fixedly provided with a limiting block 18.

Embodiment 5 as shown in fig. 1 on the basis of embodiment 1, please refer to fig. 1-2, for the supporting column 2, the anti-skid blocks 19 are fixed under the supporting column 2, and the anti-skid blocks 19 can increase the anti-skid performance of the lower end of the supporting column 2.

Embodiment 6 is based on embodiment 1, as shown in fig. 1, for the bearing plate 11, second sliding rods 20 are fixedly disposed under four corners of the bearing plate 11, four second sliding cylinders 21 matched with the second sliding rods 20 are fixedly embedded in the workbench 1, the second sliding cylinders 21 are respectively slidably sleeved on outer walls of the corresponding second sliding rods 20, and the bearing plate 11 cannot be tilted by using the limiting effects of the second sliding rods 20 and the second sliding cylinders 21, so that the bearing plate 11 can be always kept horizontal.

Embodiment 7 is as shown in fig. 2 on the basis of embodiment 1, for the fixture, the fixture includes end plates 22, end plates 22 are all fixedly disposed on both ends of the bearing plate 11, threaded cylinders 23 are all fixedly embedded in the middle portions of the end plates 22, threaded screws 24 are all connected in the threaded cylinders 23, a cross rod 25 is fixedly disposed at one ends of the screw rods 24, bearings 26 are fixedly sleeved on outer walls of the other ends of the screw rods 24, clamping plates 27 are all fixedly disposed on one sides of the bearings 26 far away from the screw rods 24, the screw rods 24 can be rotated through the cross rods 25, so that the clamping plates 27 can be driven to move on the bearing plate 11 to complete clamping and fixing of the workpiece to be processed, and the position of the workpiece.

Embodiment 8 as shown in fig. 1 on the basis of embodiment 1, a drill chuck 15 is fixedly installed at a lower end of a rotating shaft of a motor 7, a drill bit 8 is installed below the drill chuck 15, a drill chuck 15 is fixedly installed at a lower end of a rotating shaft of the motor 7, a drill bit 8 is installed below the drill chuck 15, a limiting device comprises a first slide bar 16 and a first slide cylinder 17, first slide bars 16 are fixedly installed at four corners of an installation plate 6, four first slide cylinders 17 matched with the first slide bars 16 are fixedly embedded in a top plate 4, the first slide cylinders 17 are respectively slidably sleeved on outer walls of the corresponding first slide bars 16, limiting blocks 18 are fixedly installed at upper ends of the first slide bars 16, anti-skid pads 19 are fixedly installed below a supporting column 2, second slide bars 20 are fixedly installed below four corners of the loading plate 11, four second slide cylinders 21 matched with the second slide bars 20 are fixedly embedded in a workbench 1, the second slide cylinders 21 are respectively slidably sleeved on outer walls of the corresponding second slide bars 20, the fixture comprises an end plate 22, the end plate 22 is fixedly arranged at both ends of the bearing plate 11, a threaded cylinder 23 is fixedly embedded in the middle of the end plate 22, a screw rod 24 is connected in the threaded cylinder 23 in a threaded manner, a cross rod 25 is fixedly arranged at one end of the screw rod 24, a bearing 26 is fixedly sleeved on the outer wall of the other end of the screw rod 24, a clamping plate 27 is fixedly arranged at one side of the bearing 26, which is far away from the screw rod 24, the drill chuck 15 can facilitate the disassembly and the installation of the drill bit 8, the mounting plate 6 can move vertically and vertically by utilizing the limiting action of the first slide rod 16 and the first slide cylinder 17, so that the punching quality can be further increased, the antiskid cushion block 19 can increase the antiskid performance of the lower end of the support column 2, the bearing plate 11 can not skew by utilizing the limiting action of the second slide rod 20 and the second slide cylinder 21, so as to be kept horizontal all the time, the screw rod, and the position where the member to be machined is clamped on the bearing plate 11 can be adjusted.

Embodiment 9 as shown in fig. 1-2, the punching device automatically controlled by PLC includes a workbench 1, support columns 2 are fixedly disposed below four corners of the workbench 1, a support plate 3 is fixedly disposed on one side of the workbench 1, a top plate 4 is fixedly disposed on an inner wall of an upper end of the support plate 3, a hydraulic cylinder 5 is fixedly disposed on the top plate 4, a piston rod of the hydraulic cylinder 5 penetrates through the top plate 4, a mounting plate 6 is fixedly disposed at a lower end of the top plate 4, a motor 7 is fixedly disposed below the mounting plate 6, a drill 8 is fixedly disposed below a rotating shaft of the motor 7, an infrared distance measuring sensor 9 is fixedly embedded on the mounting plate 6, a limiting device is disposed on the mounting plate 6, a pressure sensor 10 is fixedly embedded on the workbench 1, a bearing plate 11 is fixedly disposed on the pressure sensor 10, a clamp is disposed on the bearing plate 11, a PLC controller 12, a display, The infrared distance measuring sensor 9, the display screen 13, the control panel 14 and the hydraulic pump and the electromagnetic directional valve of the hydraulic cylinder 5 are electrically connected with the PLC 12, the lower end of the rotating shaft of the motor 7 is fixedly provided with a drill chuck 15, a drill bit 8 is arranged below the drill chuck 15, the limiting device comprises a first slide bar 16 and a first slide cylinder 17, the four corners of the mounting plate 6 are fixedly provided with the first slide bars 16, the top plate 4 is fixedly embedded with the first slide cylinders 17 which are four in number and matched with the first slide bars 16, and the first slide cylinders 17 are respectively sleeved on the outer walls of the corresponding first slide bars 16 in a sliding manner;

the upper end of a first slide bar 16 is fixedly provided with a limiting block 18, anti-skid cushion blocks 19 are fixedly arranged below a support column 2, second slide bars 20 are fixedly arranged below four corners of a bearing plate 11, four second slide cylinders 21 matched with the second slide bars 20 are fixedly embedded in a workbench 1, the second slide cylinders 21 are respectively sleeved on the outer walls of the corresponding second slide bars 20 in a sliding manner, a clamp comprises end plates 22, end plates 22 are fixedly arranged on two ends of the bearing plate 11, threaded cylinders 23 are fixedly embedded in the middle of the end plates 22, screw rods 24 are connected in the threaded cylinders 23 in a threaded manner, a cross rod 25 is fixedly arranged at one end of each screw rod 24, a bearing 26 is fixedly sleeved on the outer wall of the other end of each screw rod 24, clamp plates 27 are fixedly arranged on one sides of the bearings 26 far away from the screw rods 24, a drill chuck 15 is fixedly arranged at the lower end of a rotating shaft of a motor 7, a drill bit 8 is arranged under a drill chuck 15, the limiting device comprises a first slide bar 16 and a first slide cylinder 17, four corners of a mounting plate 6 are all fixedly provided with the first slide bar 16, a top plate 4 is fixedly embedded with four first slide cylinders 17 matched with the first slide bar 16, the first slide cylinders 17 are respectively sleeved on the outer walls of the corresponding first slide bars 16 in a sliding way, the upper ends of the first slide bars 16 are all fixedly provided with limiting blocks 18, anti-skid cushion blocks 19 are all fixedly arranged under supporting columns 2, second slide bars 20 are all fixedly arranged under four corners of a bearing plate 11, a workbench 1 is fixedly embedded with four second slide cylinders 21 matched with the second slide bars 20, the second slide cylinders 21 are respectively sleeved on the outer walls of the corresponding second slide bars 20 in a sliding way, the clamp comprises end plates 22, end plates 22 are all fixedly arranged on two ends of the bearing plate 11, threaded cylinders 23 are all fixedly embedded in the middle parts of the end plates 22, and screw rods 24 are all in the threaded cylinders 23, a cross rod 25 is fixedly arranged at one end of the screw rod 24, a bearing 26 is fixedly sleeved on the outer wall of the other end of the screw rod 24, and a clamping plate 27 is fixedly arranged on one side, far away from the screw rod 24, of the bearing 26.

For the convenience of understanding the technical solutions of the present invention, the following detailed description will be made on the working principle or the operation mode of the present invention in the practical process.

In practical application, firstly, a workpiece to be machined is clamped and fixed at a proper position on a bearing plate 11 by using a clamp, then the drilling depth is input through a control panel 14, a PLC (programmable logic controller) 12 can automatically control the hydraulic cylinder 5 to extend, when a drill 8 contacts the workpiece, a pressure sensor 10 can detect the increase of a pressure value and transmit the detected data to the PLC 12, the PLC 12 can record the distance between the infrared distance measuring sensor 9 and a top plate 4 at the moment, then the PLC 12 can automatically control a motor 7 to work to drive the drill 8 to rotate at a high speed and control the hydraulic cylinder 5 to extend slowly to perform drilling operation, when the increase of the distance between the infrared distance measuring sensor 9 and the top plate 4 reaches the input drilling extension value, the PLC 12 can automatically control the hydraulic cylinder 5 to recover and reset, and the motor 7 is closed, so that the PLC 12 can be used for completing automatic punching operation, the punching depth can be accurately controlled, the punching quality is stable, the drilling efficiency is high, the drill chuck 15 can facilitate the disassembly and the assembly of the drill bit 8, the mounting plate 6 can move vertically by utilizing the limiting action of the first slide bar 16 and the first slide cylinder 17, thereby further increasing the punching quality, the antiskid cushion block 19 can increase the antiskid performance of the lower end of the support column 2, the bearing plate 11 can not be inclined by utilizing the limiting function of the second slide bar 20 and the second slide cylinder 21, therefore, the workpiece can be always kept horizontal, the screw rod 24 can be rotated through the cross rod 25, the clamping plate 27 can be driven to move on the bearing plate 11 to complete clamping and fixing of the workpiece to be machined, and the position of the workpiece to be machined clamped on the bearing plate 11 can be adjusted.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The punching device automatically controlled by the PLC is characterized by comprising a workbench (1), supporting columns (2) are fixedly arranged below four corners of the workbench (1), a supporting plate (3) is fixedly arranged on one side of the workbench (1), a top plate (4) is fixedly arranged on the inner wall of the upper end of the supporting plate (3), a hydraulic cylinder (5) is fixedly arranged on the top plate (4), a piston rod of the hydraulic cylinder (5) penetrates through the top plate (4) and the lower end of the top plate is fixedly provided with a mounting plate (6), a motor (7) is fixedly arranged below the mounting plate (6), a drill bit (8) is fixedly arranged below a rotating shaft of the motor (7), an infrared distance measuring sensor (9) is fixedly embedded on the mounting plate (6), a limiting device is arranged on the mounting plate (6), a pressure sensor (10) is fixedly embedded on the workbench (1), fixed loading board (11) that is equipped with on pressure sensor (10), be equipped with anchor clamps on loading board (11), the fixed PLC controller (12), display screen (13) and control panel (14) that are equipped with of support arm outer wall, motor (7) pressure sensor (10) infrared distance measuring sensor (9) display screen (13) control panel (14) with the hydraulic pump and the solenoid directional valve of pneumatic cylinder (5) all with PLC controller (12) electric connection.

2. The PLC automatic control punching device according to claim 1, wherein a drill chuck (15) is fixedly mounted at the lower end of the rotating shaft of the motor (7), and a drill bit (8) is mounted below the drill chuck (15).

3. The PLC automatic control punching device according to claim 1, wherein the limiting device comprises a first sliding rod (16) and a first sliding barrel (17), the first sliding rod (16) is fixedly arranged at each of four corners of the mounting plate (6), the first sliding barrels (17) which are four in number and matched with the first sliding rods (16) are fixedly embedded in the top plate (4), and the first sliding barrels (17) are respectively slidably sleeved on the outer walls of the corresponding first sliding rods (16).

4. The PLC automatic control punching device according to claim 3, wherein the upper ends of the first sliding rods (16) are respectively and fixedly provided with a limiting block (18).

5. The PLC automatic control punching device according to claim 1, characterized in that anti-skid blocks (19) are fixed below the supporting columns (2).

6. The PLC automatic control punching device according to claim 1, wherein second sliding rods (20) are fixedly arranged at four corners of the bearing plate (11), second sliding cylinders (21) which are four in number and matched with the second sliding rods (20) are fixedly embedded in the workbench (1), and the second sliding cylinders (21) are respectively sleeved on the outer walls of the corresponding second sliding rods (20) in a sliding manner.

7. The PLC automatic control punching device according to claim 1, wherein the fixture comprises end plates (22), the end plates (22) are fixedly arranged at both ends of the bearing plate (11), a threaded cylinder (23) is fixedly embedded in the middle of each end plate (22), a lead screw (24) is connected in each threaded cylinder (23) in a threaded manner, a cross rod (25) is fixedly arranged at one end of the lead screw (24), a bearing (26) is fixedly sleeved on the outer wall of the other end of the lead screw (24), and a clamping plate (27) is fixedly arranged at one side of the bearing (26) away from the lead screw (24).

8. The PLC automatic control punching device according to claim 1, wherein a drill chuck (15) is fixedly mounted at the lower end of a rotating shaft of the motor (7), a drill bit (8) is mounted below the drill chuck (15), the drill chuck (15) is fixedly mounted at the lower end of the rotating shaft of the motor (7), the drill bit (8) is mounted below the drill chuck (15), the limiting device comprises a first sliding rod (16) and a first sliding barrel (17), the four corners of the mounting plate (6) are respectively and fixedly provided with the first sliding rod (16), the top plate (4) is fixedly embedded with the four first sliding barrels (17) matched with the first sliding rod (16), the first sliding barrels (17) are respectively sleeved on the outer walls of the corresponding first sliding rods (16) in a sliding manner, the upper ends of the first sliding rods (16) are respectively and fixedly provided with limiting blocks (18), antiskid cushion blocks (19) are fixedly arranged below the supporting columns (2), second slide bars (20) are fixedly arranged below four corners of the bearing plate (11), the workbench (1) is fixedly embedded with four second sliding cylinders (21) which are matched with the second sliding rods (20), the second sliding cylinders (21) are respectively sleeved on the outer walls of the corresponding second sliding rods (20) in a sliding manner, the clamp comprises end plates (22), the end plates (22) are fixedly arranged at the two ends of the bearing plate (11), the middle parts of the end plates (22) are fixedly embedded with threaded cylinders (23), the threaded cylinders (23) are connected with screw rods (24) in a threaded manner, a cross rod (25) is fixedly arranged at one end of the screw rod (24), a bearing (26) is fixedly sleeved on the outer wall of the other end of the screw rod (24), clamping plates (27) are fixedly arranged on one sides, far away from the screw rod (24), of the bearings (26).

9. The PLC automatic control punching device according to claim 1, comprising a workbench (1), wherein support columns (2) are fixedly arranged below four corners of the workbench (1), a support plate (3) is fixedly arranged on one side of the workbench (1), a top plate (4) is fixedly arranged on the inner wall of the upper end of the support plate (3), a hydraulic cylinder (5) is fixedly arranged on the top plate (4), a piston rod of the hydraulic cylinder (5) penetrates through the top plate (4), a mounting plate (6) is fixedly arranged at the lower end of the piston rod, a motor (7) is fixedly arranged below the mounting plate (6), a drill bit (8) is fixedly arranged below a rotating shaft of the motor (7), an infrared distance measuring sensor (9) is fixedly embedded on the mounting plate (6), a limiting device is arranged on the mounting plate (6), a pressure sensor (10) is fixedly embedded on the workbench (1), the pressure sensor (10) is fixedly provided with a bearing plate (11), the bearing plate (11) is provided with a clamp, the outer wall of the supporting arm is fixedly provided with a PLC (programmable logic controller) (12), a display screen (13) and a control panel (14), the motor (7), the pressure sensor (10), the infrared distance measuring sensor (9), the display screen (13), the control panel (14) and a hydraulic pump and an electromagnetic reversing valve of the hydraulic cylinder (5) are electrically connected with the PLC (12), the lower end of a rotating shaft of the motor (7) is fixedly provided with a drill chuck (15), a drill bit (8) is arranged below the drill chuck (15), the limiting device comprises a first sliding rod (16) and a first sliding cylinder (17), four first sliding rods (16) are fixedly arranged on four corners of the mounting plate (6), the top plate (4) is fixedly embedded with four first sliding cylinders (17) which are matched with the first sliding rods (16), the first sliding cylinders (17) are respectively sleeved on the outer walls of the corresponding first sliding rods (16) in a sliding manner;

the fixture is characterized in that limiting blocks (18) are fixedly arranged at the upper ends of the first sliding rods (16), anti-skid cushion blocks (19) are fixedly arranged below the supporting columns (2), second sliding rods (20) are fixedly arranged below four corners of the bearing plate (11), four second sliding cylinders (21) matched with the second sliding rods (20) are fixedly embedded in the workbench (1), the second sliding cylinders (21) are respectively sleeved on the outer walls of the corresponding second sliding rods (20) in a sliding manner, the fixture comprises end plates (22), end plates (22) are fixedly arranged at two ends of the bearing plate (11), threaded cylinders (23) are fixedly embedded in the middle of the end plates (22), screw rods (24) are connected in the threaded cylinders (23) in a threaded manner, a cross rod (25) is fixedly arranged at one end of each screw rod (24), and a bearing (26) is fixed on the outer wall of the other end of each screw rod (24), the bearing (26) is fixedly provided with clamping plates (27) on one side far away from the screw rod (24), the lower end of a rotating shaft of the motor (7) is fixedly provided with a drill chuck (15), a drill bit (8) is arranged below the drill chuck (15), the lower end of the rotating shaft of the motor (7) is fixedly provided with the drill chuck (15), the drill bit (8) is arranged below the drill chuck (15), the limiting device comprises a first sliding rod (16) and a first sliding barrel (17), the four corners of the mounting plate (6) are fixedly provided with the first sliding rod (16), the top plate (4) is fixedly embedded with the four first sliding barrels (17) matched with the first sliding rod (16), the first sliding barrels (17) are respectively sleeved on the outer walls of the corresponding first sliding rods (16) in a sliding mode, the upper ends of the first sliding rods (16) are respectively and fixedly provided with limiting blocks (18), antiskid cushion blocks (19) are fixedly arranged below the supporting columns (2), second slide bars (20) are fixedly arranged below four corners of the bearing plate (11), the workbench (1) is fixedly embedded with four second sliding cylinders (21) which are matched with the second sliding rods (20), the second sliding cylinders (21) are respectively sleeved on the outer walls of the corresponding second sliding rods (20) in a sliding manner, the clamp comprises end plates (22), the end plates (22) are fixedly arranged at the two ends of the bearing plate (11), the middle parts of the end plates (22) are fixedly embedded with threaded cylinders (23), the threaded cylinders (23) are connected with screw rods (24) in a threaded manner, a cross rod (25) is fixedly arranged at one end of the screw rod (24), a bearing (26) is fixedly sleeved on the outer wall of the other end of the screw rod (24), clamping plates (27) are fixedly arranged on one sides, far away from the screw rod (24), of the bearings (26).