Polishing machine for machining valve

Abstract

The utility model relates to a polishing machine for machining a valve. Comprising a rack, a mounting top plate and a polishing mounting frame are fixedly connected to the top of the rack, a transverse movement driving device is mounted on the polishing mounting frame, a lifting driving device is mounted at the moving end of the transverse movement driving device, and a polishing device is mounted at the moving end of the lifting driving device; two groups of movable through grooves which are arranged in parallel are formed in the mounting top plate, a feeding seat structure which is movably connected with the mounting top plate is arranged in each movable through groove, and the two groups of feeding driving devices are mounted on the rack and are respectively connected with the two groups of feeding seat structures; a workpiece clamping device is mounted on each feeding seat structure, each workpiece clamping device comprises a lifting mounting seat slidably connected to the corresponding feeding seat structure and further comprises a lifting driving cylinder, a passage assembly is rotatably connected to the lifting mounting seat, and a clamping jaw air cylinder is mounted at the upper end of the passage assembly; a rotary joint is mounted at the lower end part of the passage component; and a rotation driving device is further included. Alternate grinding operation is achieved by arranging double stations, clamped workpieces can be driven to rotate in the grinding process, the operation process is simple, and working efficiency is high.

Description

Technical Field

[0001] This utility model belongs to the field of valve processing technology, and in particular relates to a polishing machine for processing valves. Background Technology

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and regulate and control the parameters of the transported medium. Based on their function, they can be divided into shut-off valves, check valves, and regulating valves, etc. Valves used in fluid control systems have various structures and functions, ranging from the simplest shut-off valves to the various valves used in extremely complex automatic control systems; their types and specifications are quite numerous. The valve body is the main component of the valve, and the other parts of the valve are installed on the valve body to form the valve.

[0003] Flanges need to be machined at the fluid inlet, fluid outlet, and upper end of the valve stem mounting hole on the valve body. The fluid inlet and fluid outlet are used to connect to the pipe body, and the upper end of the valve stem mounting hole is used to install the valve body's upper end cover. During valve manufacturing, to ensure the valve's sealing performance, the end flanges of the valve body need to be ground to ensure a smooth surface, thus facilitating connection to the pipeline.

[0004] In the process of grinding and polishing valve bodies, the valve body is mainly fixed and held in place by a clamping fixture, and then ground by a grinding tool. Because the clamping fixture is fixed in position and cannot rotate, after grinding and polishing one end of the valve body, it needs to be removed and re-clamped before the other end can be ground. This process is cumbersome and reduces the efficiency of the polishing machine. Furthermore, existing polishing machines only use a single station for grinding the workpiece, resulting in low efficiency. Therefore, there is an urgent need to design a polishing machine for processing valves to solve these problems. Utility Model Content

[0005] This invention provides a polishing machine for processing valves with a reasonable structural design to solve the technical problems existing in the prior art. This invention achieves alternating polishing operations by setting up a dual-station system, and can rotate the clamped workpiece during polishing, making the operation simple and the work efficiency high.

[0006] The technical solution adopted by this utility model to solve the technical problems existing in the prior art is as follows: A polishing machine for processing valves includes a frame, a mounting plate fixed to the top of the frame, a grinding mounting frame mounted on the mounting plate, a transversely arranged transverse drive device mounted on the grinding mounting frame, a longitudinally arranged lifting drive device mounted at the moving end of the transverse drive device, and a grinding device for grinding the workpiece mounted at the moving end of the lifting drive device; two sets of movable through slots arranged in parallel are provided on the mounting plate, and a feeding seat structure movably connected to the mounting plate is provided in each movable through slot; the machine also includes two sets of feeding drive devices mounted on the frame. Two sets of feeding drive devices are respectively connected to two sets of feeding seat structures, used to drive the corresponding feeding seat structures to move laterally toward or away from the grinding mounting frame; each feeding seat structure is equipped with a workpiece clamping device for clamping workpieces. The workpiece clamping device includes a lifting mounting seat slidably connected to the feeding seat structure, and a lifting drive cylinder for driving the lifting mounting seat to move up and down. A passage assembly is rotatably connected to the lifting mounting seat. A gripper cylinder is installed at the upper end of the passage assembly. Multiple sets of workpiece grippers are detachably installed on the gripper cylinder. A rotary joint is installed at the lower end of the passage assembly; a rotation drive device is also included to drive the passage assembly to rotate.

[0007] The advantages and positive effects of this utility model are as follows: This utility model provides a polishing machine for processing valves. By setting two sets of workpiece clamping devices, it realizes dual-station polishing operation of valve body workpieces. By setting a grinding device that can move laterally between the two sets of workpiece clamping devices and can move up and down, it can realize dual-station alternating grinding and polishing operation. By setting a feeding seat structure and a feeding drive device, it can drive the workpiece clamping device and the workpiece it clamps to move laterally, which facilitates the operator to quickly unload and load the workpiece while the grinding device is grinding and polishing a workpiece, further improving work efficiency. By setting a rotation drive device, it can drive the workpiece clamped by the workpiece clamping device to rotate, so that the grinding device can perform grinding and polishing operation on multiple ends of the valve body, eliminating the need for the operator to repeatedly disassemble and install the workpiece, making the operation simple and the work efficiency high.

[0008] Preferably, the rotation drive device includes a rotation motor mounted on a lifting mounting base, and a pulley drive pair is installed between the output shaft of the rotation motor and the passage assembly.

[0009] Preferably, the passage assembly includes a passage shaft rotatably connected to a lifting mounting base, a line passage connecting its upper and lower end faces at the center of the passage shaft, and multiple sets of gas passages arranged around the line passages. The two ports of each gas passage are respectively connected to the lower end face and the upper outer peripheral wall of the passage shaft, and a gas nozzle is installed at each of the two ports of the gas passage.

[0010] Preferably, the transverse drive device includes a transverse guide rail fixed to the grinding mounting bracket, a transverse mounting seat slidably connected to the transverse guide rail via a slider, a transverse slide table mounted on the grinding mounting bracket, the moving end of the transverse slide table being connected to the transverse mounting seat, and a transverse motor mounted on the grinding mounting bracket, with a transverse transmission pair installed between the output shaft of the transverse motor and the input shaft of the transverse slide table; the lifting drive device includes a longitudinally arranged lifting slide table mounted on the transverse mounting bracket, a grinding lifting seat mounted on the moving end of the lifting slide table, and a lifting motor for driving the lifting slide table.

[0011] Preferably, the grinding device includes a rotating shaft mounting base installed at the moving end of the lifting drive device, a horizontally arranged grinding rotating shaft rotatably connected to the rotating shaft mounting base, a grinding wheel installed at the outer end of the grinding rotating shaft, a grinding motor installed at the moving end of the lifting drive device, a pulley drive pair installed between the output shaft of the grinding motor and the grinding rotating shaft, and a dust suction hood installed on the rotating shaft mounting base and covering the grinding wheel, with an air outlet communicating with its inner cavity installed on the dust suction hood.

[0012] Preferably, the feeding drive device includes a rodless cylinder fixed to the bottom surface of the feeding drive device, and a movable seat plate installed at the moving end of the rodless cylinder. The movable seat plate passes through a strip groove opened on the mounting top plate and is connected to the feeding seat structure.

[0013] Preferably, the feeding seat structure includes a feeding seat plate and a mounting base plate arranged vertically, with four sets of longitudinally arranged lifting guide rods fixed between the feeding seat plate and the mounting base plate, and the lifting mounting seat slidably connected to the lifting guide rods via linear bearings; it also includes a cylinder seat mounted on the mounting base plate, with the cylinder of the lifting drive cylinder connected to the cylinder seat via mounting corner pieces, and the stationary part of the rotary joint connected to the cylinder seat via screws; it also includes a workpiece pad fixed in the middle of the feeding seat plate, with a through slot for the gripper cylinder to pass through in the middle of the workpiece pad. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0015] Figure 2 This is a three-dimensional structural diagram of a portion of the structure in this utility model;

[0016] Figure 3 This is a three-dimensional structural diagram of the loading seat structure, workpiece clamping device and rotation drive device in this utility model;

[0017] Figure 4 This is a cross-sectional structural schematic diagram of the pathway component in this utility model;

[0018] Figure 5 yes Figure 1 Enlarged diagram of region A in the image;

[0019] Figure 6 yes Figure 1 A magnified diagram of region B in the image.

[0020] In the diagram: 1. Frame; 2. Movable through slot; 3. Mounting top plate; 4. Feeding guide rail; 5. Feeding seat structure; 5-1. Mounting base plate; 5-2. Cylinder seat; 5-3. Lifting guide rod; 5-4. Feeding seat plate; 5-5. Workpiece pad; 6. Workpiece clamping device; 6-1. Lifting drive cylinder; 6-2. Lifting mounting seat; 6-3. Clamping cylinder; 6-4. Workpiece clamp; 6-5. Passage assembly; 6-5-1. Gas passage; 6-5-2. Passage shaft; 6-5-3. Thrust ball bearing; 6-5-4. Bearing mounting seat; 6-5-5. Circuit passage; 6-6. Rotary joint; 7. Rotation drive device; 7-1. Pulley drive pair; 7-2. Rotation motor; 8. 8-1 Limiting structure; 8-2 Limiting mounting base; 8-3 Limiting bolt; 8-4 Hydraulic buffer; 9. Grinding mounting bracket; 10. Lifting drive device; 10-1 Grinding lifting seat; 10-2 Lifting slide; 10-3 Lifting motor; 11. Horizontal movement drive device; 11-1 Horizontal movement guide rail; 11-2 Horizontal movement slide; 11-3 Horizontal movement mounting base; 11-4 Horizontal movement motor; 11-5 Horizontal movement transmission pair; 12. Grinding device; 12-1 Rotary shaft mounting base; 12-2 Grinding rotary shaft; 12-3 Dust suction hood; 12-4 Grinding wheel; 12-5 Grinding motor; 13. Feeding drive device; 13-1 Rodless cylinder; 13-2 Moving seat plate. Detailed Implementation

[0021] To further understand the invention content, features, and effects of this utility model, the following embodiments are provided in detail:

[0022] Please see Figure 1 The polishing machine for processing valves according to this utility model includes a frame 1, with multiple sets of support legs and casters installed at the bottom of the frame 1. A mounting plate 3 is fixed to the top of the frame 1, and a grinding mounting frame 9 is mounted on the mounting plate 3. A transversely arranged transverse drive device 11 is mounted on the grinding mounting frame 9, and a longitudinally arranged lifting drive device 10 is mounted at the moving end of the transverse drive device 11. A grinding device 12 for grinding the workpiece is mounted at the moving end of the lifting drive device 10.

[0023] like Figure 5 and Figure 6As shown, the aforementioned transverse drive device 11 includes a transverse guide rail 11-1 fixed to the grinding mounting frame 9 and a transverse mounting base 11-3 slidably connected to the transverse guide rail 11-1 via a slider. It also includes a transverse slide 11-2 mounted on the grinding mounting frame 9, with the moving end of the slide 11-2 connected to the transverse mounting base 11-3. Furthermore, it includes a transverse motor 11-4 mounted on the grinding mounting frame 9, and a transverse transmission pair 11-5 installed between the output shaft of the transverse motor 11-4 and the input shaft of the transverse slide 11-2. The transverse transmission pair 11-5 includes a driving pulley keyed to the output shaft of the transverse motor 11-4 and a driven pulley keyed to the input shaft of the transverse slide 11-2. A transmission belt is installed between the driving pulley and the driven pulley.

[0024] The lifting drive device 10 includes a longitudinally arranged lifting slide 10-2 mounted on a transverse mounting base 11-3, a grinding lifting seat 10-1 mounted on the moving end of the lifting slide 10-2, and a lifting motor 10-3 for driving the lifting slide 10-2.

[0025] like Figure 5 As shown, the aforementioned grinding device 12 includes a rotating shaft mounting base 12-1 mounted on a grinding lifting base 10-1. A horizontally arranged grinding rotating shaft 12-2 is rotatably connected to the rotating shaft mounting base 12-1. A grinding wheel 12-4 is mounted on the outer end of the grinding rotating shaft 12-2. It also includes a grinding motor 12-5 mounted on the grinding lifting base 10-1, with a pulley drive pair installed between the output shaft of the grinding motor 12-5 and the grinding rotating shaft 12-2. Furthermore, it includes a dust suction hood 12-3 mounted on the rotating shaft mounting base 12-1, covering the grinding wheel 12-4. The dust suction hood 12-3 has an air outlet communicating with its inner cavity for absorbing dust generated during the grinding process. The grinding motor 12-5 is mounted on the grinding lifting base 10-1, and the grinding rotating shaft 12-2 is rotatably connected to the grinding lifting base 10-1 via a rolling bearing.

[0026] like Figure 1 As shown, two sets of movable slots 2 are arranged side by side on the mounting top plate 3. Each movable slot 2 is provided with a feeding seat structure 5 that is movably connected to the mounting top plate 3. A horizontally arranged feeding guide rail 4 is fixed to both sides of each movable slot 2. The extension direction of the feeding guide rail 4 is perpendicular to the extension direction of the transverse guide rail 11-1. The feeding seat structure 5 is slidably connected to the feeding guide rail 4 through a slider.

[0027] It also includes two sets of feeding drive devices 13 installed on the frame 1. The two sets of feeding drive devices 13 are respectively connected to two sets of feeding seat structures 5, and are used to drive the corresponding feeding seat structure 5 to move laterally toward or away from the grinding mounting frame 9.

[0028] like Figure 2 As shown, the feeding drive device 13 includes a rodless cylinder 13-1 fixed to the bottom surface of the feeding drive device 13, and a movable seat plate 13-2 installed at the moving end of the rodless cylinder 13-1. The movable seat plate 13-2 passes through a strip groove opened on the mounting top plate 3 and is connected to the feeding seat structure 5.

[0029] At both ends of the feeding guide rail 4, there are limiting structures 8 connected to the mounting top plate 3 to limit the position of the feeding seat structure 5. The limiting structure 8 includes a limiting mounting seat 8-1 installed on the mounting top plate 3, a limiting bolt 8-2 installed on the limiting mounting seat 8-1, and a hydraulic buffer 8-3 installed on the limiting mounting seat 8-1. A collision block installed on the feeding seat plate 5-4 is connected to the limiting bolt 8-2 and the hydraulic buffer 8-3.

[0030] like Figure 1 and Figure 3 As shown, each loading seat structure 5 is equipped with a workpiece clamping device 6 for clamping workpieces. The workpiece clamping device 6 includes a lifting mounting seat 6-2 slidably connected to the loading seat structure 5, and a lifting drive cylinder 6-1 for driving the lifting mounting seat 6-2 to move up and down. A passage assembly 6-5 is rotatably connected to the lifting mounting seat 6-2. A gripper cylinder 6-3 is installed at the upper end of the passage assembly 6-5. Multiple sets of workpiece grippers 6-4 are detachably installed on the gripper cylinder 6-3. A rotary joint 6-6 is installed at the lower end of the passage assembly 6-5.

[0031] like Figure 4As shown, the aforementioned passage assembly 6-5 includes a passage shaft 6-5-2 rotatably connected to the lifting mounting base 6-2. A line passage 6-5-5 connecting its upper and lower end faces is opened at the center of the passage shaft 6-5-2. It also includes multiple gas passages 6-5-1 arranged around the line passage 6-5-5. The two ports of each gas passage 6-5-1 are respectively connected to the lower end face and the upper outer peripheral wall of the passage shaft 6-5-2. A gas nozzle is installed at each of the two ports of the gas passage 6-5-1. The passage assembly 6-5 also includes a bearing mounting base 6-5-4 mounted on the bottom surface of the lifting mounting base 6-2. The passage shaft 6-5-2 is rotatably connected to the bearing mounting base 6-5-4 via a thrust ball bearing 6-5-3. The passage shaft 6-5-2 has a T-shaped structure, and its upper part is rotatably connected to the lifting mounting base 6-2 via the thrust ball bearing 6-5-3. The lower end of the passage shaft 6-5-2 is connected to the rotary joint 6-6 via a connecting rod. In actual operation, the electrical wires are run through the above-mentioned wire passage 6-5-5. A through groove is provided on the outer wall of the above-mentioned wire passage 6-5-5 to connect the outer wall of the passage shaft 6-5-2 for easy installation. The above-mentioned gas passage 6-5-1 is used for gas flow in the gripper cylinder 6-3.

[0032] like Figure 2 and Figure 3 As shown, the loading seat structure 5 includes a loading seat plate 5-4 and a mounting base plate 5-1 arranged vertically. Four sets of longitudinally arranged lifting guide rods 5-3 are fixed between the loading seat plate 5-4 and the mounting base plate 5-1. The lifting mounting seat 6-2 is slidably connected to the lifting guide rods 5-3 via linear bearings. It also includes a cylinder seat 5-2 mounted on the mounting base plate 5-1. The cylinder of the lifting drive cylinder 6-1 is connected to the cylinder seat 5-2 via mounting brackets. The stationary part of the rotary joint 6-6 is connected to the cylinder seat 5-2 via screws. It also includes a workpiece pad 5-5 fixed in the middle of the loading seat plate 5-4. A slot for the gripper cylinder 6-3 to pass through is provided in the middle of the workpiece pad 5-5. A bellows cover is installed at the end of each loading seat plate 5-4, and L-shaped mounting seats are installed at both ends of the movable through slot 2. The end of each bellows cover is mounted on the corresponding L-shaped mounting seat.

[0033] like Figure 1 and Figure 3 As shown, this embodiment also includes a rotation drive device 7 for driving the passage assembly 6-5 to rotate. The rotation drive device 7 includes a rotation motor 7-2 mounted on the lifting mounting base 6-2, and a pulley drive pair 7-1 installed between the output shaft of the rotation motor 7-2 and the passage assembly 6-5. The pulley drive pair 7-1 includes a driving pulley keyed to the output shaft of the rotation motor 7-2, and a driven pulley keyed to the passage shaft 6-5-2. A belt drives between the driving pulley and the driven pulley.

[0034] Working principle:

[0035] In actual operation, the rodless cylinder 13-1 in the feeding drive device 13 drives a set of feeding seat structures 5 to move along the feeding guide rail 4 away from the grinding mounting frame 9 to the edge of the frame 1, so that the operator can place the valve body to be ground on the feeding seat structure 5 and use the workpiece clamping device 6 to clamp the valve body, thereby realizing the feeding operation. Then the rodless cylinder 13-1 is started again, driving the feeding seat structure 5, the workpiece clamping device 6 and the workpiece clamped by the workpiece clamping device 6 to move towards the grinding mounting frame 9, thereby facilitating the grinding device 12 to grind the valve body workpiece.

[0036] During the grinding process, the lifting drive device 10 and the transverse drive device 11 can drive the grinding device 12 to move laterally and lift, thereby expanding the grinding range of the grinding device 12. At the same time, during the grinding process, the rodless cylinder 13-1 can drive the loading seat structure 5 to move laterally along the loading guide rail 4, thereby driving the valve body to move along the loading guide rail 4, further expanding the grinding range of the valve body. In addition, after the grinding operation of one end of the valve body is completed, the rotation motor 7-2 in the rotation drive device 7 is started, driving the passage component 6-5 to rotate, thereby driving the gripper cylinder 6-3 and the valve body workpiece held on it to rotate, so that the grinding device 12 can perform grinding and polishing operations on multiple ends of the valve body.

[0037] During the above-mentioned grinding and polishing operation, another set of feeding drive device 13 can be used to push the feeding seat structure 5 to the edge of the frame 1 for feeding operation. After the feeding operation is completed, the workpiece is moved to the processing station, which makes it convenient for the grinding device 12 to alternately perform grinding and polishing operations between the two feeding seat structures 5, thus improving work efficiency.

Claims

1. A polishing machine for processing valves, characterized in that: The system includes a frame (1), a mounting plate (3) fixed to the top of the frame (1), a grinding mounting frame (9) mounted on the mounting plate (3), a transversely arranged transverse drive device (11) mounted on the grinding mounting frame (9), a longitudinally arranged lifting drive device (10) mounted at the moving end of the transverse drive device (11), and a grinding device (12) for grinding the workpiece mounted at the moving end of the lifting drive device (10); two sets of movable through slots (2) arranged in parallel are provided on the mounting plate (3), and a loading seat structure (5) movably connected to the mounting plate (3) is provided in each movable through slot (2); the system also includes two sets of loading drive devices (13) mounted on the frame (1), and the two sets of loading drive devices (13) are respectively connected to the two loading seats. The seat structure (5) is connected to drive the corresponding loading seat structure (5) to move laterally toward or away from the grinding mounting frame (9); each loading seat structure (5) is equipped with a workpiece clamping device (6) for clamping the workpiece. The workpiece clamping device (6) includes a lifting mounting seat (6-2) slidably connected to the loading seat structure (5), and a lifting drive cylinder (6-1) for driving the lifting mounting seat (6-2) to move up and down. A passage assembly (6-5) is rotatably connected to the lifting mounting seat (6-2). A gripper cylinder (6-3) is installed at the upper end of the passage assembly (6-5). Multiple sets of workpiece grippers (6-4) are detachably installed on the gripper cylinder (6-3). A rotary joint (6-6) is installed at the lower end of the passage assembly (6-5). It also includes a rotation drive (7) for driving the passage assembly (6-5) to rotate.

2. The polishing machine for processing valves as described in claim 1, characterized in that: The rotation drive device (7) includes a rotation motor (7-2) mounted on a lifting mounting base (6-2), and a pulley drive pair (7-1) is installed between the output shaft of the rotation motor (7-2) and the passage assembly (6-5).

3. The polishing machine for processing valves as described in claim 1, characterized in that: The passage assembly (6-5) includes a passage shaft (6-5-2) rotatably connected to the lifting mounting base (6-2). A line passage (6-5-5) connecting the upper and lower end faces is opened at the center of the passage shaft (6-5-2). It also includes multiple gas passages (6-5-1) arranged around the line passage (6-5-5). The two ports of each gas passage (6-5-1) are respectively connected to the lower end face and the upper outer peripheral wall of the passage shaft (6-5-2). A gas nozzle is installed at each of the two ports of the gas passage (6-5-1).

4. The polishing machine for processing valves as described in claim 1, characterized in that: The transverse drive device (11) includes a transverse guide rail (11-1) fixed to the grinding mounting bracket (9) and a transverse mounting base (11-3) slidably connected to the transverse guide rail (11-1) via a slider. It also includes a transverse slide (11-2) mounted on the grinding mounting bracket (9), the moving end of which is connected to the transverse mounting base (11-3). Furthermore, it includes a transverse motor (11) mounted on the grinding mounting bracket (9). -4), a transverse transmission pair (11-5) is installed between the output shaft of the transverse motor (11-4) and the input shaft of the transverse slide (11-2); the lifting drive device (10) includes a longitudinally arranged lifting slide (10-2) mounted on the transverse mounting base (11-3), a grinding lifting seat (10-1) is installed at the moving end of the lifting slide (10-2), and a lifting motor (10-3) for driving the lifting slide (10-2).

5. The polishing machine for processing valves as described in claim 1, characterized in that: The polishing device (12) includes a rotating shaft mounting base (12-1) installed at the moving end of the lifting drive device (10), a horizontally arranged polishing rotating shaft (12-2) rotatably connected to the rotating shaft mounting base (12-1), a polishing wheel (12-4) installed at the outer end of the polishing rotating shaft (12-2), a polishing motor (12-5) installed at the moving end of the lifting drive device (10), a pulley drive pair installed between the output shaft of the polishing motor (12-5) and the polishing rotating shaft (12-2); and a dust suction hood (12-3) installed on the rotating shaft mounting base (12-1) and covering the polishing wheel (12-4), with an air outlet connected to its inner cavity installed on the dust suction hood (12-3).

6. The polishing machine for processing valves as described in claim 1, characterized in that: The feeding drive device (13) includes a rodless cylinder (13-1) fixed to the bottom surface of the feeding drive device (13), and a movable seat plate (13-2) installed at the moving end of the rodless cylinder (13-1). The movable seat plate (13-2) passes through a strip groove opened on the mounting top plate (3) and is connected to the feeding seat structure (5).

7. The polishing machine for processing valves as described in claim 1, characterized in that: The loading seat structure (5) includes a loading seat plate (5-4) and a mounting base plate (5-1) arranged vertically. Four sets of lifting guide rods (5-3) are fixed between the loading seat plate (5-4) and the mounting base plate (5-1). The lifting mounting seat (6-2) is slidably connected to the lifting guide rods (5-3) through a linear bearing. The structure also includes a cylinder seat (5-2) mounted on the mounting base plate (5-1). The cylinder of the lifting drive cylinder (6-1) is connected to the cylinder seat (5-2) through a mounting corner piece. The stationary part of the rotary joint (6-6) is connected to the cylinder seat (5-2) through a screw. The structure also includes a workpiece pad (5-5) fixed in the middle of the loading seat plate (5-4). A slot for the gripper cylinder (6-3) to pass through is provided in the middle of the workpiece pad (5-5).

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