Numerically-controlled machine tool rotating table clamping mechanism convenient to maintain

Abstract

The utility model discloses a numerically-controlled machine tool rotating table clamping mechanism convenient to maintain. The numerically-controlled machine tool rotating table clamping mechanism comprises an oil cylinder base installed on a table base and an oil cylinder installed on the oil cylinder base. A plurality of pistons are mounted in the oil cylinder; friction plates are mounted on the end surfaces of the oil cylinders; one end of the friction plate close to the oil cylinder seat is fixedly connected with the oil cylinder, and one end far away from the oil cylinder seat is contacted with the piston. The clamping device has the advantages that the friction plate is mounted on the oil cylinder, the piston pushes the friction plate to generate elastic deformation during clamping, the friction plate is used for clamping the clamping surface of the rotary table, only the friction plate needs to be dismounted and replaced regularly, and the clamping device is convenient and fast to dismount and low in maintenance cost.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control machine tools, in particular to a rotary table clamping mechanism for numerical control machine tools which is easy to maintain. Background Art

[0002] The rotary table of a CNC boring and milling machine is used to carry the workpiece to be processed. When processing different surfaces of the workpiece, the rotary table needs to be rotated to the working angle to meet the processing requirements of different surfaces of the workpiece. Since the shape of the workpiece to be processed may be irregular, its center of gravity is not necessarily in the center of the worktable, and there is an eccentricity phenomenon. The workpiece has a torque on the rotation center of the worktable, which can easily cause the workpiece and the worktable to tip over. In order to prevent the workpiece from tipping over, a clamping mechanism needs to be set on the worktable to lock the worktable. The traditional cylinder piston clamping mechanism relies on the piston to clamp the clamping surface of the rotary table. After working for a long time, the piston will inevitably wear, affecting the clamping effect, and the disassembly and maintenance costs are high. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a CNC machine tool rotary table clamping mechanism which is easy to maintain. A friction plate is installed on the oil cylinder. When clamping, the piston pushes the friction plate to cause elastic deformation. The friction plate is used to clamp the clamping surface of the rotary table. It only needs to be disassembled and replaced regularly. The disassembly is convenient and quick, and the maintenance cost is low.

[0004] In order to solve the above technical problems, the technical solution of the utility model is a CNC machine tool rotary table clamping mechanism that is easy to maintain, including a cylinder seat installed on the worktable base and a cylinder installed on the cylinder seat; a plurality of pistons are installed in the cylinder; a friction plate is installed on the end surface of the cylinder; the friction plate is fixedly connected to the cylinder at one end close to the cylinder seat, and is in contact with the piston at the other end away from the cylinder seat.

[0005] Furthermore, a pressure strip is installed on the end surface of the oil cylinder; one end of the pressure strip is used to mount the friction plate on the oil cylinder through screws, and the other end of the pressure strip is provided with an avoidance groove on a side close to the oil cylinder.

[0006] Furthermore, the end surface of the oil cylinder is provided with a plurality of mounting holes for mounting the piston; a piston oil seal is installed in each of the mounting holes; the piston oil seal is cylindrical, and the bottom of the piston oil seal contacts the end of the piston away from the friction plate.

[0007] Furthermore, the piston oil seal is made of a flexible material.

[0008] Furthermore, a step for supporting the oil cylinder is provided on the side of the oil cylinder seat that contacts the oil cylinder.

[0009] Furthermore, a plurality of mounting holes are provided at relative positions of the upper and lower end faces of the oil cylinder; a through hole is provided between the upper and lower mounting holes to connect the two mounting holes; a penetrating oil hole is also provided on the oil cylinder; the oil hole connects the plurality of through holes; and the piston and piston oil seal are installed in the plurality of mounting holes.

[0010] Furthermore, friction plates and pressure strips are installed on the upper and lower end surfaces of the oil cylinder; and a piston oil seal is installed in each of the mounting holes.

[0011] Furthermore, the bottom of the oil cylinder seat is installed on the top of the adjustment pad; the adjustment pad is fixedly connected to the workbench base.

[0012] Furthermore, the adjustment pad is integrally connected to the workbench base.

[0013] Beneficial effects of the utility model:

[0014] The present application installs a friction plate on the oil cylinder, one end of the friction plate is fixed to the oil cylinder, and the other end is in contact with the piston. When the rotary table needs to be clamped, the hydraulic oil enters the oil cylinder from the external oil circuit, and the hydraulic oil pushes the piston to move, and the piston pushes the friction plate. After the friction plate is elastically deformed, it abuts against the clamping surface of the rotary table to clamp the rotary table. When the friction plate is worn after working for a certain period of time, it only needs to be disassembled and replaced. The disassembly is convenient and quick, and the maintenance cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a cross-sectional schematic diagram of embodiment 1 installed on a rotary workbench;

[0016] Figure 2 This is a schematic diagram of the overall structure of Example 2;

[0017] Figure 3 This is a cross-sectional schematic diagram of embodiment 2 installed on a rotary workbench;

[0018] Figure 4 is a cross-sectional view of the oil cylinder in Example 2;

[0019] Figure 5 for Figure 4 Cross-sectional view of the cylinder in the other direction.

[0020] In the figure, 1-cylinder seat, 2-cylinder, 201-mounting hole, 202-through hole, 203-oil hole, 3-rotating worktable, 4-worktable base, 5-pressure strip, 6-piston, 7-piston oil seal, 8-adjusting pad, 9-friction plate, 10-step. DETAILED DESCRIPTION

[0021] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0022] Example 1

[0023] A CNC machine tool rotary table clamping mechanism that is easy to maintain, such as Figure 1 As shown, it includes a cylinder seat 1 installed on a workbench base 4, and a cylinder 2 installed on the cylinder seat 1; a plurality of pistons 6 are installed in the cylinder 2; a friction plate 9 is installed on the lower end surface of the cylinder 2; the end of the friction plate 9 close to the cylinder seat 1 is fixedly connected to the cylinder 2, and the end away from the cylinder seat 1 is in contact with the piston 6.

[0024] By installing the friction plate on the oil cylinder 2, one end of the friction plate 9 is fixed to the oil cylinder 2, and the other end is in contact with the piston 6. When the rotary table 3 needs to be clamped, the hydraulic oil enters the oil cylinder 2 from the external oil circuit, and the hydraulic oil pushes the piston 6 to move, and the piston 6 pushes the friction plate 9. After the friction plate 9 is elastically deformed, it abuts against the clamping surface at the bottom of the rotary table 3 to clamp the rotary table 3. After working for a certain period of time, the friction plate 9 is worn, and it only needs to be disassembled and replaced. The disassembly is convenient and quick, and the maintenance cost is low.

[0025] Specifically, a pressure strip 5 is installed on the lower end surface of the oil cylinder 2; one end of the pressure strip 5 is used to install the friction plate 9 on the oil cylinder 2 by screws, and the other end of the pressure strip 5 is provided with an escape groove on the side close to the oil cylinder 2. When clamping, the friction plate 9 is elastically deformed toward the clamping surface of the rotary table 3 under the extrusion of the piston 6, and the escape groove provides space for the bending deformation of the friction plate 9.

[0026] Specifically, the end surface of the oil cylinder 2 is provided with a plurality of mounting holes 201 for mounting the piston 6; in order to prevent oil leakage from the gaps around the piston 6, a piston oil seal 7 is installed in each mounting hole 201; the piston oil seal 7 is cylindrical, and the bottom of the piston oil seal 7 is in contact with the end of the piston 6 away from the friction plate 9. Specifically, the piston oil seal 7 is made of a flexible material. In this embodiment, the material of the piston oil seal 7 is rubber. When clamping is required, after the oil enters the oil cylinder 2 from the external oil circuit, the piston oil seal 7 is pushed to move, and the side wall of the piston oil seal 7 expands and deforms outward under the action of the oil pressure, which plays a good sealing role. At the same time, the movement of the piston oil seal 7 pushes the piston 6 toward the clamping surface of the rotary table 3 to perform a clamping action.

[0027] Specifically, a step 10 for supporting the oil cylinder 2 is provided on the side of the oil cylinder seat 1 in contact with the oil cylinder 2. The step 10 plays a positioning role on the one hand, and plays a certain supporting role on the other hand.

[0028] Specifically, the bottom of the oil cylinder seat 1 is installed on the top of the adjustment pad 8; the adjustment pad 8 is fixedly connected to the workbench base 4. The workbench base 4 is a casting, and the surface flatness is not high. The adjustment pad 8 is arranged and the upper end surface of the adjustment pad 8 is processed to ensure the flatness of the surface of the adjustment pad 8, which can improve the installation accuracy of the oil cylinder seat 1.

[0029] Specifically, the adjustment pad 8 is integrally connected to the workbench base 4. In this embodiment, the adjustment pad 8 is integrally connected to the workbench base 4 by casting.

[0030] Example 2

[0031] A CNC machine tool rotary table clamping mechanism that is easy to maintain, such as Figure 2-5 As shown, compared with Example 1, an additional group of mounting holes 201 is opened in the oil cylinder 2, and a piston 6 is installed in the newly added mounting holes 201, and a friction plate 9 and a pressure strip 5 are added to one side of the newly added piston 6 of the oil cylinder 2. The rest of the structure is the same as that of Example 1.

[0032] Specifically, a plurality of mounting holes 201 are provided at the positions of the upper and lower end surfaces of the oil cylinder 2 that are opposite to each other; a through hole 202 is provided between the upper and lower mounting holes 201 to connect the two mounting holes 201; a through oil hole 203 is also provided on the oil cylinder 2; the oil hole 203 connects the plurality of through holes 202; and pistons 6 are installed in the plurality of mounting holes 201. The conventional oil cylinder piston type clamping mechanism only has the piston 6 provided at the upper or lower end of the oil cylinder, and can only clamp on one side. The oil cylinder 2 is subjected to the reaction force of the clamping force, and has a tendency to move upward or downward to rebound or to produce plastic deformation. The clamping effect is poor, and it is easy to cause damage to the oil cylinder 2 and the oil cylinder seat 1, and the disassembly and maintenance costs are high.

[0033] In this embodiment H, the upper and lower mounting holes 201 are provided, and a piston 6 and a piston oil seal 7 are installed in each mounting hole 201. When clamping is required, the oil enters the oil cylinder 2 from the external oil circuit, enters the through hole 202 through the oil hole 203, and pushes the upper and lower opposing pistons 6 to move toward the upper and lower clamping surfaces of the rotary table 3 respectively, and performs a clamping action, thereby realizing bidirectional clamping, having a good clamping effect, and balancing the force of the oil cylinder, which can effectively extend the service life of the oil cylinder 2 and the oil cylinder seat 1, and reduce the cost of disassembly and maintenance.

[0034] Specifically, in order to improve the clamping effect, friction plates 9 and pressure strips 5 are installed on both the upper and lower end surfaces of the oil cylinder 2 .

[0035] The working principle of this utility model:

[0036] When braking, the hydraulic oil enters the oil cylinder 2 from the external oil circuit, pushing the piston oil seal 7 to move, and the side wall of the piston oil seal 7 expands and deforms outward under the action of the oil pressure, playing a good sealing role. The movement of the piston oil seal 7 pushes the piston 6 to move toward the clamping surface of the rotary table 3, and the piston 6 pushes the friction plate 9. After the friction plate 9 is elastically deformed, it abuts against the clamping surface of the rotary table 3 to clamp the rotary table 3. After working for a certain period of time, the friction plate 9 is worn, and it only needs to be disassembled and replaced. The disassembly is convenient and quick, and the maintenance cost is low.

[0037] The above is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A maintenance-friendly rotary table clamping mechanism for a CNC machine tool, comprising a cylinder seat (1) mounted on a table base (4), and a cylinder (2) mounted on the cylinder seat (1); a plurality of pistons (6) are mounted in the cylinder (2); the characteristics are: A friction plate (9) is installed on the end surface of the oil cylinder (2); the end of the friction plate (9) close to the oil cylinder seat (1) is fixedly connected to the oil cylinder (2), and the end away from the oil cylinder seat (1) is in contact with the piston (6).

2. The CNC machine tool rotary table clamping mechanism that is easy to maintain according to claim 1 is characterized in that: A pressure strip (5) is installed on the end surface of the oil cylinder (2); one end of the pressure strip (5) is used to install the friction plate (9) on the oil cylinder (2) by means of screws, and the other end of the pressure strip (5) is provided with an avoidance groove on a side close to the oil cylinder (2).

3. The easy-to-maintain CNC machine tool rotary table clamping mechanism according to claim 2 is characterized in that: The end surface of the oil cylinder (2) is provided with a plurality of mounting holes (201) for mounting the piston (6); a piston oil seal (7) is mounted in each mounting hole (201); the piston oil seal (7) is cylindrical, and the bottom of the piston oil seal (7) is in contact with an end of the piston (6) away from the friction plate (9).

4. The easy-to-maintain CNC machine tool rotary table clamping mechanism according to claim 3 is characterized in that: The piston oil seal (7) is made of a flexible material.

5. The maintenance-friendly rotary table clamping mechanism for CNC machine tools according to claim 1, characterized in that: A step (10) for supporting the oil cylinder (2) is provided on the side of the oil cylinder seat (1) that contacts the oil cylinder (2).

6. The maintenance-friendly rotary table clamping mechanism for CNC machine tools according to claim 3 is characterized in that: The upper and lower end surfaces of the oil cylinder (2) are provided with a plurality of mounting holes (201) at positions opposite to each other; a through hole (202) is provided between the upper and lower mounting holes (201) to connect the two mounting holes (201); the oil cylinder (2) is also provided with a through oil hole (203); the oil hole (203) connects the plurality of through holes (202); and the piston (6) and the piston oil seal (7) are installed in the plurality of mounting holes (201).

7. The easy-to-maintain CNC machine tool rotary table clamping mechanism according to claim 6 is characterized in that: The upper and lower end surfaces of the oil cylinder (2) are both equipped with friction plates (9) and pressure strips (5).

8. The maintenance-friendly rotary table clamping mechanism for CNC machine tools according to claim 1, characterized in that: The bottom of the oil cylinder seat (1) is installed on the top of the adjustment pad (8); the adjustment pad (8) is fixedly connected to the workbench base (4).

9. The maintenance-friendly rotary table clamping mechanism for CNC machine tools according to claim 8, characterized in that: The adjustment pad (8) is integrally connected to the workbench base (4).

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