Workpiece positioning and clamping device

Abstract

The utility model provides a workpiece positioning and clamping device, which relates to the technical field of numerical control machining and comprises a vertical pipe frame and a clamping disc frame, the clamping disc frame is fixed on the vertical pipe frame, a workpiece groove is formed in the clamping disc frame in a penetrating manner, and a pair of clamping seats fixed with the clamping disc frame are symmetrically arranged on two sides of the workpiece groove. The end, facing the workpiece groove, of the clamping base is provided with a pneumatically-driven push plate piece. Compared with a traditional workpiece positioning and clamping structure, the workpiece positioning and clamping structure has the advantages that the buffering ring which is arranged in the workpiece groove and matched with the clamping base in position is adopted to serve as a workpiece pre-fixing structure, and the buffering ring makes contact with a clamping component of the clamping base in advance in the follow-up clamping process; instantaneous stress of the workpiece and the clamping component is buffered through the filling material in the structure, then the clamping component and the workpiece are clamped and fixed through axial contraction of the buffering ring, and then the whole workpiece positioning, clamping and fixing process is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control machining, and relates to a workpiece positioning and clamping device. Background Art

[0002] Vertical CNC milling machine is a high-precision machine tool that uses digital control technology. It can complete various complex processing operations, such as engraving, drilling, milling, etc. It consists of a workbench, column, beam, tool holder, spindle, CNC system, hydraulic system, electronic control system and other parts. It has the characteristics of high precision, high speed, high efficiency and high quality. It is widely used in various fields such as machinery, aviation, automobile, electronics, construction, and medical treatment.

[0003] During milling, after the workpiece is transferred to the positioning point of the machining platform, it is usually necessary to use a clamping device to complete the positioning and fixation of the workpiece. The existing clamping device usually adopts a pneumatic structure, and uses instantaneous pneumatic control after positioning to make the clamping component move and clamp the workpiece. However, when the workpiece is offset within a certain tolerance, the instantaneous active clamping component will make rigid contact with the end of the offset workpiece, and then the edge of the workpiece may be damaged during clamping, affecting the yield and processing effect of the machining operation. Utility Model Content

[0004] In view of the above technical problems existing in the prior art, a workpiece positioning and clamping device is provided.

[0005] The purpose and effect of the utility model are achieved by the following specific technical means:

[0006] A workpiece positioning and clamping device, comprising a vertical pipe frame and a clamping disc frame, wherein the clamping disc frame is fixed on the vertical pipe frame, a workpiece slot is formed through the clamping disc frame, and a pair of clamping seats fixed to the clamping disc frame are symmetrically arranged on both sides of the workpiece slot, and the clamping seats are provided with pneumatically driven push plates toward the end of the workpiece slot;

[0007] Buffer rings are arranged on both sides of the workpiece groove relative to the clamping seat, the annular structure of the buffer ring is made of filling material, and a tray is fixed at the bottom of the buffer ring;

[0008] An air pump seat is fixed in the riser frame, an external valve is provided through the bottom of the air pump seat, and a lifting shaft is slidably matched between the air pump seat and the tray.

[0009] Furthermore, both sides of the buffer ring are protruded to form L-shaped edge plates, and an inner slide rail is embedded in the workpiece groove, and the inner slide rail is slidably matched with the edge plate of the buffer ring.

[0010] Furthermore, a bearing disc seat is provided between the clamping disc frame and the riser frame, and the bearing disc seat is slidably matched with the tray.

[0011] Furthermore, a longitudinal groove is formed through the middle of the lifting shaft, and a slider is slidably matched between the air pump seat and the groove of the lifting shaft.

[0012] Furthermore, the push plate surface is provided with a plurality of mounting slot holes.

[0013] Furthermore, a pneumatic shaft is slidably arranged between the push plate and the clamping seat, a cylinder slidably matched with the pneumatic shaft is arranged in the clamping seat, and an air valve pipe is externally connected to the clamping seat cylinder, and a concave rail frame is slidably matched with the pneumatic shaft and the cylinder connection end.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] Compared with the traditional workpiece positioning and clamping structure, this workpiece positioning and clamping device adopts a buffer ring arranged in the workpiece groove and matched with the position of the clamping seat as a pre-fixing structure of the workpiece. During subsequent clamping, the buffer ring first contacts the clamping component of the clamping seat, and the filling material in the structure buffers the instantaneous force of the workpiece and the clamping component. Then, the clamping component and the workpiece are clamped and fixed through the axial contraction of the buffer ring, thereby protecting the entire workpiece positioning, clamping and fixing process and improving the safety and practicality of the clamping device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the overall internal planar structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the internal planar structure of the clamping seat of the utility model.

[0019] Markings in the figure: 1-vertical pipe frame; 2-clamping disc frame; 3-clamping seat; 4-workpiece groove; 5-buffer ring; 6-push plate; 7-air valve pipe; 8-inner slide rail; 9-bearing disc seat; 10-tray; 11-lifting shaft; 12-air pump seat; 13-external valve; 14-pneumatic shaft; 15-concave rail frame. DETAILED DESCRIPTION

[0020] See also Figure 1-3 , the embodiments of the utility model are further described;

[0021] A workpiece positioning and clamping device, comprising a riser frame 1 and a clamping disc frame 2, wherein the clamping disc frame 2 is fixed on the riser frame 1, a workpiece slot 4 is formed through the clamping disc frame 2, and a pair of clamping seats 3 fixed to the clamping disc frame 2 are symmetrically arranged on both sides of the workpiece slot 4, and a pneumatically driven push plate 6 is arranged on the end of the clamping seat 3 toward the workpiece slot 4;

[0022] Buffer rings 5 ​​are provided on both sides of the workpiece groove 4 relative to the clamping seat 3. The annular structure of the buffer ring 5 is made of filling material, and a tray 10 is fixed at the bottom of the buffer ring 5.

[0023] An air pump seat 12 is fixed in the vertical pipe frame 1 , an external valve 13 is provided through the bottom of the air pump seat 12 , and a lifting shaft 11 is slidably matched between the air pump seat 12 and the tray 10 .

[0024] The setting method of the clamping device is based on the existing clamping workpiece fixing position, with the upper surface platform of the clamping disc frame 2 as the docking end of the workpiece conveying track. When the workpiece passes through the workpiece slot 4 on the clamping disc frame 2, the external air source is connected to the external valve 13 in the air pump seat 12 to start the control lifting shaft 11, and the lifting of the lifting shaft 11 drives the tray 10 and the buffer ring 5 to rise from the workpiece slot 4 to the workpiece position, and the buffer ring 5 structure is used to pre-fix and contact with the workpiece, and the annular inner diameter structure of the buffer ring 5 is customized according to the edge structure and size of the actual workpiece to be fixed;

[0025] Then, the push plate member 6 of the clamping seat 3 is controlled by pneumatic feed, so that the push plate member 6 moves horizontally into the workpiece groove 4 to dock and clamp the outer edge of the buffer ring 5, and then the lifting shaft 11 is reset by the external air source control of the external valve 13 in the air pump seat 12 to reset the buffer ring 5 inwardly into the workpiece groove 4, and at the same time, the gas continuously supplied by the clamping seat 3 is used to finally push the push plate member 6 to the edge of the workpiece and clamp it to the workpiece;

[0026] Compared with the traditional pneumatic structure, the clamping device can use the buffer ring 5 axially arranged in the workpiece groove 4 to buffer the instantaneous impact force of the push plate 6 when the clamping seat 3 is pneumatically driven. Then, the push plate 6 and the workpiece are finally clamped and fixed by axial resetting of the buffer ring 5, so as to divide the entire pneumatic pushing and clamping process into two parts, so as to buffer the clamping action of the workpiece and the push plate 6, avoid rigid contact caused by factors such as workpiece deviation, damage to the workpiece and the clamping structure, and improve the safety and practicality of the clamping device.

[0027] Preferably, L-shaped edge plates are protruding on both sides of the buffer ring 5, and an inner slide rail 8 is embedded in the workpiece groove 4, and the inner slide rail 8 is slidably matched with the edge plate of the buffer ring 5. The axial displacement of the buffer ring 5 is limited by the slide rail 8 structure arranged between the buffer ring 5 and the workpiece groove 4, so as to improve the axial displacement accuracy and stability of the buffer ring 5.

[0028] Preferably, a bearing disc seat 9 is provided between the clamping disc frame 2 and the riser frame 1, and the bearing disc seat 9 is slidably matched with the pallet 10, so that the bearing disc seat 9 provided between the riser frame 1 and the clamping disc frame 2 serves as an axial limiting structure of the axially movable structure of the pallet 10, so as to ensure the axial displacement accuracy of the pallet 10 while externally protecting the pallet 10 structure.

[0029] Preferably, a longitudinal groove is formed through the middle of the lifting shaft 11, and a slider is slidably fitted in the groove of the air pump seat 12 and the lifting shaft 11. The lifting shaft 11 uses a slider arranged between the air pump seat 12 to axially limit the maximum sliding distance of the lifting shaft 11 while slidingly fitting with the inner cavity wall of the air pump seat 12.

[0030] Preferably, the surface of the push plate member 6 is provided with a plurality of mounting slots. The push plate member 6 serves as a clamping structure for the workpiece and can be installed and fixed with an external customized clamping workpiece structure through the mounting slots to adapt to workpieces with different edge specifications, thereby improving the applicability of the device.

[0031] On the basis of the above, a pneumatic shaft 14 is slidably arranged between the push plate member 6 and the clamping seat 3, a cylinder slidably matched with the pneumatic shaft 14 is arranged in the clamping seat 3, and the cylinder of the clamping seat 3 is externally connected to an air valve tube 7, and the pneumatic shaft 14 and the cylinder connecting end are slidably matched with a concave rail frame 15. The pneumatic structure of the clamping seat 3 and the push plate member 6 is based on the existing pneumatic push rod, and the air valve tube 7 is used to connect the external air source, so that when the air source is fed, the gas in the cylinder in the clamping seat 3 expands to instantly act on the end of the pneumatic shaft 14, and the pneumatic shaft 14 is pushed outward along the concave rail frame 15 to make the push plate member 6 contact with the workpiece, and the clamping force of the entire push plate member 6 structure is maintained by the continuous supply of gas.

[0032] The implementation method of the device is that the upper surface platform of the clamping disc rack 2 is used as the docking end of the workpiece conveying track. When the workpiece passes through the workpiece slot 4 on the clamping disc rack 2, the external air source is connected to the external valve 13 in the air pump seat 12 to start the control of the lifting shaft 11, and the lifting of the lifting shaft 11 drives the tray 10 and the buffer ring 5 to rise from the workpiece slot 4 to the workpiece position, and the buffer ring 5 structure is used to pre-fix and contact with the workpiece, and then the push plate 6 of the clamping seat 3 is controlled by pneumatic feeding, and the air valve pipe 7 is used to connect the external air source to pass through when the air source is fed. The gas in the cylinder in the clamping seat 3 expands to instantaneously act on the end of the pneumatic shaft 14, and the pneumatic shaft 14 is pushed outward along the concave rail frame 15 to make the push plate 6 contact with the workpiece, and the clamping force of the entire push plate 6 structure is maintained by the continuous supply of gas. Subsequently, the lifting shaft 11 is reset through the external air source control of the external valve 13 in the air pump seat 12 to reset the buffer ring 5 inward to the workpiece groove 4. At the same time, the gas continuously supplied by the clamping seat 3 is used to finally push the push plate 6 to the edge of the workpiece and clamp it to the workpiece.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A workpiece positioning and clamping device, characterized in that: The invention comprises a riser frame (1) and a clamping disc frame (2), wherein the clamping disc frame (2) is fixed on the riser frame (1), a workpiece slot (4) is formed through the clamping disc frame (2), and a pair of clamping seats (3) fixed to the clamping disc frame (2) are symmetrically arranged on both sides of the workpiece slot (4), and a pneumatically driven push plate member (6) is arranged at the end of the clamping seat (3) facing the workpiece slot (4); Buffer rings (5) are provided on both sides of the workpiece groove (4) relative to the clamping seat (3); the annular structure of the buffer ring (5) is made of a filling material, and a tray (10) is fixed at the bottom of the buffer ring (5); An air pump seat (12) is fixed in the riser frame (1), an external valve (13) is provided through the bottom of the air pump seat (12), and a lifting shaft (11) is slidably matched between the air pump seat (12) and the tray (10).

2. A workpiece positioning and clamping device according to claim 1, characterized in that: Both sides of the buffer ring (5) are protruded to form L-shaped edge plates, and an inner slide rail (8) is embedded in the workpiece groove (4), and the inner slide rail (8) is slidably matched with the edge plate of the buffer ring (5).

3. A workpiece positioning and clamping device according to claim 1, characterized in that: A bearing disc seat (9) is provided between the clamping disc frame (2) and the vertical pipe frame (1), and the bearing disc seat (9) is slidably matched with the tray (10).

4. A workpiece positioning and clamping device according to claim 1, characterized in that: A longitudinal groove is formed through the middle of the lifting shaft (11), and a sliding block is slidably matched between the air pump seat (12) and the groove of the lifting shaft (11).

5. A workpiece positioning and clamping device according to claim 1, characterized in that: The push plate member (6) is provided with a plurality of mounting slot holes on its surface.

6. A workpiece positioning and clamping device according to claim 1, characterized in that: A pneumatic shaft (14) is slidably arranged between the push plate (6) and the clamping seat (3), a cylinder is arranged in the clamping seat (3) and is slidably matched with the pneumatic shaft (14), and the cylinder of the clamping seat (3) is externally connected to an air valve pipe (7), and a concave rail frame (15) is slidably matched with the connection end of the pneumatic shaft (14) and the cylinder.

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