An inner hole processing fixture for thin-wall open sliding bearing

Abstract

The application discloses a kind of inner hole processing clamps of thin-walled, open sliding bearing, support base is connected with cylinder base body;Cylinder ejection inlet connector is threadedly sealed with cylinder base body;Cylinder lower pull inlet connector is threadedly sealed with cylinder base body;Cylinder piston rod is threadedly connected with ball head connecting rod and locks tight;Limit flange is connected with ejector rod connecting flange;Ball head connecting rod is connected with ejector rod connecting flange by ball head cooperation connection;Ejector rod connecting flange is connected with ejector rod;Clamping sleeve is connected with pneumatic three-jaw chuck main body;Locking block is connected with special-shaped soft jaw;Pneumatic three-jaw chuck main body is connected with support base;Chuck locking inlet connector is threadedly sealed with pneumatic three-jaw chuck main body;Chuck release inlet connector is threadedly sealed with pneumatic three-jaw chuck main body.The application can effectively solve the clamping deformation problem in the processing of thin-walled, open bearing, save the application component semi-finishing process, after inner hole processing, size precision can be stably kept at 7 level precision.

Description

Technical Field

[0001] This invention relates to the field of sliding bearing processing technology, and more particularly to a fixture for machining the inner hole of a thin-walled, open sliding bearing. Background Technology

[0002] Sliding bearings are widely used due to their simple structure, ability to withstand high loads, and stable operation. Open sliding composite bearings, in particular, can maintain stable operation for extended periods even under low-oil lubrication conditions after the addition of a non-metallic coating. These bearings typically possess both "thin walls" and "open" characteristics. Due to manufacturing limitations, the internal bore dimensional accuracy of this type of bearing is relatively low, limiting its application to shaft-hole mating mechanisms with low assembly precision. To apply this type of bearing to mechanisms with precision shaft-hole mating, it must be press-fitted into the application component, followed by precision machining of the component and bearing together. The overall machining process is as follows: rough machining of the component → semi-finishing of the component → press-fitting of the bearing → finish machining of the component. Clearly, this manufacturing process is complex and costly.

[0003] If this type of sliding bearing can be machined to a high precision state separately and then applied to a mechanism with precision shaft and hole fit, the machining process can be simplified. The simplified machining process is: rough machining of the part → fine machining of the part → press-fitting of the bearing. Obviously, this production process is more convenient than before.

[0004] The key step in achieving the above process is to machine low-dimensional precision sliding bearings with thin walls and open features into high-dimensional precision. Machining this type of sliding bearing to high dimensional precision requires precise and reasonable machining fixtures. Summary of the Invention

[0005] To solve the above problems, the present invention provides a fixture for machining the inner hole of a thin-walled, open sliding bearing.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is: a machining fixture for the inner hole of a thin-walled, open sliding bearing, comprising a support base connected to a cylinder base; a cylinder ejection air inlet connector threadedly and sealed to the cylinder base; a cylinder pull-down air inlet connector threadedly and sealed to the cylinder base; a cylinder piston rod threadedly and locked to a ball joint connecting rod; a limiting flange connected to a push rod connecting flange; a ball joint connecting rod and a push rod connecting flange connected via a ball joint fit; a push rod connecting flange connected to a push rod; a clamping sleeve connected to a pneumatic three-jaw chuck body; a locking block connected to a non-circular soft jaw; a pneumatic three-jaw chuck body connected to the support base; a chuck locking air inlet connector threadedly and sealed to the pneumatic three-jaw chuck body; and a chuck release air inlet connector threadedly and sealed to the pneumatic three-jaw chuck body.

[0007] Furthermore, the support base and the cylinder base are connected by cylinder locking screws.

[0008] Furthermore, the cylinder piston rod is threadedly connected to the ball joint connecting rod and locked by the piston lock nut.

[0009] Furthermore, the limit flange and the top rod connecting flange are connected by flange locking screws.

[0010] Furthermore, the top rod connecting flange is connected to the top rod via top rod locking screws.

[0011] Furthermore, there are three top rods, which are evenly distributed in the center space along the axis of the top rod connecting flange.

[0012] Furthermore, the clamping sleeve is fitted with the center clearance of the pneumatic three-jaw chuck body and connected by the clamping sleeve locking screw.

[0013] Furthermore, the locking block and the irregular soft claw are connected by a keying engagement and a locking screw via the soft claw.

[0014] Furthermore, the pneumatic three-jaw chuck body is connected to the support base via the support base locking screws.

[0015] Furthermore, the upper end face of the push rod is aligned with the lower end face of the sliding bearing.

[0016] This invention can effectively solve the problem of clamping deformation during the processing of thin-walled, open bearings, and eliminate the semi-finishing process of the application component (the component into which the sliding bearing is installed). After the inner hole is processed, the dimensional accuracy can be stably maintained at level 7. Compared with the previous method, the processing efficiency is improved and the manufacturing cost is reduced accordingly. Attached Figure Description

[0017] Fig. 1 This is a schematic diagram of the structure of the present invention;

[0018] Fig. 2 This is a top view of the present invention;

[0019] Fig. 3 This is a structural diagram of a sliding bearing.

[0020] The components are: 1-support base, 2-cylinder ejection air inlet connector, 3-cylinder base, 4-cylinder pull-down air inlet connector, 5-cylinder piston rod, 6-piston locking nut, 7-ball joint connecting rod, 8-limiting flange, 9-locking block, 10-irregular soft claw, 11-soft claw locking screw, 12-sliding bearing, 13-clamping sleeve, 14-push rod, 15-push rod locking screw, 16-push rod connecting flange, 17-clamping sleeve locking screw, 18-flange locking screw, 19-pneumatic three-jaw chuck body, 20-chuck locking air inlet connector, 21-chuck releasing air inlet connector, 22-support base locking screw, 23-cylinder locking screw. Detailed Implementation

[0021] The following is in conjunction with the appendix Figs. 1-3 The specific embodiments of the present invention will be further described below.

[0022] A fixture for machining the inner hole of a thin-walled, open sliding bearing includes a support base 1, which is connected to a cylinder base 3 via a cylinder locking screw 23; a cylinder ejector inlet connector 2 is threadedly sealed to the cylinder base 3; a cylinder pull-down inlet connector 4 is threadedly sealed to the cylinder base 3; a cylinder piston rod 5 is threadedly connected to a ball joint connecting rod 7 and locked by a piston locking nut 6; a limit flange 8 is connected to a push rod connecting flange 16 via a flange locking screw 18; the ball joint connecting rod 7 is connected to the push rod connecting flange 16 via a ball joint fit, with radial joint contact; the push rod connecting flange 16 is connected to the push rod 14 via a push rod locking screw 15; the push rod... There are 3 push rods 14, which are evenly distributed in the center space along the axis of the push rod connecting flange 16; the upper end face of the push rod 14 is in contact with the lower end face of the sliding bearing 12; the clamping sleeve 13 is in center clearance fit with the pneumatic three-jaw chuck body 19 and is connected by the clamping sleeve locking screw 17; the locking block 9 is connected to the 3 irregular soft claws 10 by keying fit and by the soft claw locking screw 11; the pneumatic three-jaw chuck body 19 is connected to the support base 1 by the support base locking screw 22; the chuck locking air inlet connector 20 is threadedly sealed to the pneumatic three-jaw chuck body 19; the chuck releasing air inlet connector 21 is threadedly sealed to the pneumatic three-jaw chuck body 19.

[0023] The support base 1 supports the pneumatic three-jaw chuck body 19 and the cylinder base 3. In actual use, its lower end face is in close contact with and fixed to the workpiece placement platform of the machine tool. The standard cylinder consists of five parts: cylinder ejection inlet connector 2, cylinder base 3, cylinder pull-down inlet connector 4, cylinder piston rod 5, and piston locking nut 6. Compressed air enters the lower part of the cylinder base 3 from the cylinder ejection inlet connector 2, causing the cylinder piston rod 5 to move upward, which in turn drives the piston locking nut 6, ball joint connecting rod 7, push rod connecting flange 16, and push rod 14 to move upward, pushing out the sliding bearing 12. When compressed air enters the upper part of the cylinder base 3 from the cylinder pull-down inlet connector 4, the cylinder piston rod 5 moves downward, which in turn drives the piston locking nut 6, ball joint connecting rod 7, push rod connecting flange 16, and push rod 14 to move downward, eventually descending to the lowest point.

[0024] The pneumatic three-jaw chuck assembly consists of four components: locking block 9, pneumatic three-jaw chuck body 19, chuck locking air inlet connector 20, and chuck releasing air inlet connector 21. When compressed air enters the inner cavity of the pneumatic three-jaw chuck body 19 from the chuck locking air inlet connector 20, the locking block 9 in the pneumatic three-jaw chuck body 19 drives the irregular soft jaw 10 to move along the normal direction perpendicular to the outer circle toward the axis of the sliding bearing 12. When the irregular soft jaw 10 contacts the clamping sleeve 13, it continues to "micro-move" along the normal direction to clamp. The outer circle of sleeve 13 contracts inward, causing slight deformation and clamping the sliding bearing 12 evenly. When compressed air is released from the chuck and enters the inner cavity of the pneumatic three-jaw chuck body 19, the locking block 9 in the pneumatic three-jaw chuck body 19 drives the irregular soft claw 10 to move along the normal direction perpendicular to the outer circle toward the axis away from the sliding bearing 12. When the irregular soft claw 10 disengages from the outer circle surface of the clamping sleeve 13, it continues to move in this direction, and the outer circle of the clamping sleeve 13 elastically "rebounds" outward, and the sliding bearing 12 is clamped and released.

[0025] Usage process:

[0026] Process A—Compressed air enters from the chuck after the intake connector 21 is released. The three irregular soft claws 10 move away from the center, the clamping sleeve 13 expands outward, and the circumferential clamping force on the sliding bearing 12 is reduced to zero. Compressed air enters from the cylinder outlet intake connector 2, pushing the cylinder piston rod 5 upward. The three push rods 14 push the sliding bearing 12 upward, detaching it from the "wrap" of the clamping sleeve 13. The processed sliding bearing is then manually removed.

[0027] Process B—Compressed air enters from the cylinder's pull-down air inlet connector 4, pushing the piston rod 5 downwards, causing the three push rods 14 to move downwards to the lowest limit position (at this time, the upper end face of the push rod 14 is lower than the fixed limit surface of the clamping sleeve 13 for the sliding bearing 12). The sliding bearing 12 to be processed is manually placed into the limit position of the end face of the clamping sleeve 13. Compressed air enters from the chuck locking air inlet connector 20, and the three irregular soft claws 10 move towards the center to compress the clamping sleeve 13. The sliding bearing 12 is clamped by the clamping sleeve 13. The machine tool is started for processing. After processing, process A is repeated. Process A and process B together constitute a complete fixture function and usage process.

[0028] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A fixture for machining the inner hole of a thin-walled, open sliding bearing, characterized in that, Includes a support base (1), which is connected to the cylinder base (3); a cylinder ejector inlet connector (2) is threadedly sealed to the cylinder base (3); a cylinder pull-down inlet connector (4) is threadedly sealed to the cylinder base (3); a cylinder piston rod (5) is threadedly connected to and locked to a ball joint connecting rod (7); a limit flange (8) is connected to a push rod connecting flange (16); and the ball joint connecting rod (7) and the push rod connecting flange (16) are connected by a ball joint fitting. Connect the top rod connecting flange (16) to the top rod (14); connect the clamping sleeve (13) to the pneumatic three-jaw chuck body (19); connect the locking block (9) to the irregular soft claw (10); connect the pneumatic three-jaw chuck body (19) to the support base (1); connect the chuck locking air inlet connector (20) to the pneumatic three-jaw chuck body (19) with a threaded seal; connect the chuck loosening air inlet connector (21) to the pneumatic three-jaw chuck body (19) with a threaded seal.

2. The fixture for machining the inner hole of a thin-walled, open sliding bearing according to claim 1, characterized in that, The support base (1) and the cylinder base (3) are connected by cylinder locking screws (23).

3. The fixture for machining the inner hole of a thin-walled, open sliding bearing according to claim 1, characterized in that, The cylinder piston rod (5) is threadedly connected to the ball joint connecting rod (7) and locked by the piston locking nut (6).

4. The fixture for machining the inner hole of a thin-walled, open sliding bearing according to claim 1, characterized in that, The limiting flange (8) and the top rod connecting flange (16) are connected by flange locking screws (18).

5. The internal hole machining fixture for thin-walled, open sliding bearings according to claim 1, characterized in that, The top rod connecting flange (16) and the top rod (14) are connected by the top rod locking screw (15).

6. The machining fixture for the inner hole of a thin-walled, open sliding bearing according to claim 1, characterized in that, The number of top rods (14) is 3, which are evenly distributed in space along the center axis of the top rod connecting flange (16).

7. The fixture for machining the inner hole of a thin-walled, open sliding bearing according to claim 1, characterized in that, The clamping sleeve (13) is fitted with the center clearance of the pneumatic three-jaw chuck body (19) and connected by the clamping sleeve locking screw (17).

8. The fixture for machining the inner hole of a thin-walled, open sliding bearing according to claim 1, characterized in that, The locking block (9) and the irregular soft claw (10) are connected by a key engagement and a soft claw locking screw (11).

9. The fixture for machining the inner hole of a thin-walled, open sliding bearing according to claim 1, characterized in that, The pneumatic three-jaw chuck body (19) and the support base (1) are connected by the support base locking screw (22).

10. The fixture for machining the inner hole of a thin-walled, open sliding bearing according to claim 1, characterized in that, The upper end face of the push rod (14) is in contact with and aligned with the lower end face of the sliding bearing (12).

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