Hydraulic anti-backlash locking mechanism for tailstock sleeve of slant bed numerical control lathe

Abstract

The utility model provides a hydraulic anti-backlash locking mechanism for a tailstock sleeve of a slant bed numerical control lathe. The hydraulic anti-backlash locking mechanism for the tailstock sleeve of the slant-bed numerical control lathe comprises a tailstock body, the mounting boss is fixedly mounted on the tail seat body; a tailstock body sleeve hole, wherein the tailstock body sleeve hole is arranged on the tailstock body; the tailstock sleeve is arranged on the tailstock body sleeve hole; the hydraulic oil cylinder body is arranged on the mounting boss; and the hydraulic oil cylinder piston is arranged on the inner wall of the hydraulic oil cylinder body. The hydraulic anti-backlash locking mechanism for the tailstock sleeve of the slant bed numerical control lathe has the advantage of being capable of avoiding the problem that two parts possibly generate displacement in unknown directions and sizes or swing amplitude along a center line is too large under the action of external force due to a gap between the tailstock sleeve and a tailstock body sleeve hole.

Description

Technical Field

[0001] The utility model relates to the technical field of CNC lathe parts, in particular to a hydraulic clearance eliminating locking mechanism for a tailstock sleeve of a CNC lathe with an inclined bed. Background Art

[0002] The tailstock is an important component of a CNC lathe. Its function is as follows: when a CNC lathe processes long shaft parts with a relatively large length-diameter ratio, or parts with a relatively large dead weight, the parts are usually clamped in such a way that one end of the part is clamped on the chuck at the spindle end of the lathe, and the other end is passed through the center hole pre-machined on the end face of the part, and is supported by the center installed on the tailstock, and then the outer circle and other surfaces of the part are processed using a turning tool; this clamping method requires good clamping rigidity, and does not allow the parts to vibrate or resonate during the processing process, so as to avoid tool damage resulting in tool collision or defects such as vibration marks on the surface of the part.

[0003] When clamping parts in the above manner, the tailstock body is usually fixed on the lathe guide rail in some way, and the relative movement of the tailstock body and the tailstock sleeve is used to achieve the jacking action of the parts during clamping by using the center and the withdrawal action of the center after processing. Since the tailstock body is usually fixed, the tailstock sleeve can only make linear motion relative to the tailstock body sleeve hole under the action of external force (hydraulic, manual, pneumatic, etc.). The two mating parts can move relative to each other, and their mating surfaces (here are the outer circle of the tailstock body sleeve hole and the tailstock sleeve) must have a gap (the mating gap here is generally 0,025-0,035), and the existence of a gap means that the two parts may produce displacements of unknown direction and size or swing along the center line under the action of external forces, and this displacement or swing must be avoided as much as possible during the processing process, otherwise the clamping rigidity requirements will not be met.

[0004] Therefore, it is necessary to provide a hydraulic anti-backlash locking mechanism for the tailstock sleeve of a slant bed CNC lathe to solve the above technical problems. Utility Model Content

[0005] In order to solve the technical problem that the gap between the tailstock sleeve and the sleeve hole of the tailstock body of the existing slant bed CNC lathe may cause the two parts to produce displacement of unknown direction and magnitude or excessive swing amplitude along the center line under the action of external force, the utility model provides a hydraulic anti-backlash locking mechanism for the tailstock sleeve of the slant bed CNC lathe.

[0006] The utility model provides a hydraulic backlash eliminating locking mechanism for a tailstock sleeve of a slant bed CNC lathe, comprising: a tailstock body; a mounting boss, wherein the mounting boss is fixedly mounted on the tailstock body; a tailstock body sleeve hole, wherein the tailstock body sleeve hole is arranged on the tailstock body; a tailstock sleeve, wherein the tailstock sleeve is arranged on the tailstock body sleeve hole; a hydraulic oil cylinder body, wherein the hydraulic oil cylinder body is arranged on the mounting boss; a hydraulic oil cylinder piston, wherein the hydraulic oil cylinder piston is arranged on the inner wall of the hydraulic oil cylinder body; and a locking block, wherein the locking block is arranged at one end of the hydraulic oil cylinder piston.

[0007] Preferably, a locking contact arc concave surface is provided on one side of the locking block, and the locking contact arc concave surface is matched with the tailstock sleeve.

[0008] Preferably, a plurality of M12 fine-pitch nuts are provided on the locking block, and the plurality of M12 fine-pitch nuts are all connected to the hydraulic cylinder piston.

[0009] Preferably, the tailstock body is provided with an M12 fine-pitch set screw and an M2 fine-pitch nut.

[0010] Preferably, a plurality of M6*60 hexagon socket screws are provided on the hydraulic cylinder body.

[0011] Preferably, a top is provided on the tailstock sleeve.

[0012] Compared with the related art, the hydraulic backlash-eliminating locking mechanism for the tailstock sleeve of the inclined bed CNC lathe provided by the utility model has the following beneficial effects:

[0013] The utility model provides a hydraulic backlash eliminating locking mechanism for the tailstock sleeve of a CNC lathe with an inclined bed. The locking block can be driven to move laterally through a hydraulic cylinder body and a hydraulic cylinder piston so that a locking contact arc concave surface on the locking block contacts the tailstock sleeve, so as to reduce a clearance between the tailstock sleeve and a sleeve hole of the tailstock body, which may cause a displacement of unknown direction and size or a swing amplitude along a center line of the two parts under the action of an external force. The clearance between the tailstock sleeve and the sleeve hole of the tailstock body can be reduced through the locking contact arc concave surface, which may cause a displacement of unknown direction and size or a swing amplitude along a center line of the two parts under the action of an external force. The locking block can be installed and fixed on the hydraulic cylinder piston through a plurality of M12 fine-pitch nuts, the locking block can be circumferentially positioned through an M12 fine-pitch set screw, the cylinder cover on the hydraulic cylinder body can be fixed through a plurality of M6*60 hexagon socket screws, and the top point can complete a pushing action during clamping and a withdrawal action of the top point after processing is completed through the top point. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A structural schematic diagram of a preferred embodiment of a hydraulic backlash-eliminating locking mechanism for the tailstock sleeve of a slant-bed CNC lathe provided by the utility model;

[0015] Figure 2 for Figure 1 An enlarged schematic diagram of part A shown in FIG.

[0016] Figure 3 for Figure 1 A schematic diagram of the front cross-sectional structure of the center tail seat body;

[0017] Figure 4 for Figure 1 Schematic diagram of the side view cross-section structure of the tail seat body.

[0018] Numbers in the figure: 1, tailstock body; 101, mounting boss; 102, tailstock body sleeve hole; 2, tailstock sleeve; 3, hydraulic cylinder body; 4, hydraulic cylinder piston; 5, locking block; 501, locking contact arc concave surface; 6, M12 fine pitch nut; 7, M12 fine pitch set screw; 8, M2 fine pitch nut; 9, M6*60 hexagon socket screw; 10, center. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0020] Please refer to Figure 1-4 ,in, Figure 1 A structural schematic diagram of a preferred embodiment of a hydraulic backlash-eliminating locking mechanism for the tailstock sleeve of a slant-bed CNC lathe provided by the utility model; Figure 2 for Figure 1 An enlarged schematic diagram of part A shown in FIG. Figure 3 for Figure 1 A schematic diagram of the front cross-sectional structure of the center tail seat body; Figure 4 for Figure 1 The hydraulic anti-backlash locking mechanism of the tailstock sleeve of the inclined bed CNC lathe includes: a tailstock body 1; a mounting boss 101, the mounting boss 101 is fixedly mounted on the tailstock body 1; a tailstock body sleeve hole 102, the tailstock body sleeve hole 102 is arranged on the tailstock body 1; a tailstock sleeve 2, the tailstock sleeve 2 is arranged on the tailstock body sleeve hole 102; a hydraulic cylinder body 3, the hydraulic cylinder body 3 is arranged on the mounting boss 101; a hydraulic cylinder piston 4, the hydraulic cylinder The piston 4 is arranged on the inner wall of the hydraulic cylinder body 3; the locking block 5 is arranged at one end of the hydraulic cylinder piston 4, and the locking block 5 can be driven to move laterally through the hydraulic cylinder body 3 and the hydraulic cylinder piston 4 so that the locking contact arc concave surface 501 on the locking block 5 contacts with the tailstock sleeve 2, so as to reduce the gap between the tailstock sleeve 2 and the tailstock body sleeve hole 102, resulting in the two parts under the action of external force. The displacement of unknown direction and size or the swing amplitude along the center line may occur.

[0021] A locking contact arc concave surface 501 is provided on one side of the locking block 5, and the locking contact arc concave surface 501 is adapted to the tailstock sleeve 2. The locking contact arc concave surface 501 can reduce the gap between the tailstock sleeve 2 and the tailstock body sleeve hole 102, resulting in the two parts possibly generating displacement of unknown direction and magnitude or swinging amplitude along the center line under the action of external force.

[0022] The locking block 5 is provided with a plurality of M12 fine-pitch nuts 6 , and the plurality of M12 fine-pitch nuts 6 are all connected to the hydraulic cylinder piston 4 . The locking block 5 can be installed and fixed on the hydraulic cylinder piston 4 through the plurality of M12 fine-pitch nuts 6 .

[0023] The tailstock body 1 is provided with an M12 fine-pitch set screw 7 and an M2 fine-pitch nut 8 , and the locking block 5 can be positioned circumferentially by the M12 fine-pitch set screw 7 .

[0024] The hydraulic cylinder body 3 is provided with a plurality of M6*60 hexagon socket screws 9 , and the cylinder cover on the hydraulic cylinder body 3 can be fixed by the plurality of M6*60 hexagon socket screws 9 .

[0025] The tailstock sleeve 2 is provided with a center 10, through which the pushing action during clamping and the withdrawal action of the center 10 after processing are completed can be completed.

[0026] The working principle of the hydraulic anti-backlash locking mechanism of the tailstock sleeve of the inclined bed CNC lathe provided by the utility model is as follows:

[0027] In order to avoid the situation that the gap between the tailstock sleeve 2 and the sleeve hole 102 of the tailstock body of the existing inclined bed CNC lathe may cause the two parts to produce displacement of unknown direction and size or excessive swing along the center line under the action of external force, without changing the overall structure of the original tailstock body 1, a hydraulic cylinder is designed to automatically lock and loosen the tailstock sleeve 2 under the control of the machining program, so as to achieve the purpose of eliminating the matching gap between the sleeve hole 102 of the tailstock body and the tailstock body 1; the specific structure is as follows Figure 2 , Figure 3 and Figure 4 As shown, the hydraulic cylinder body 3 is fixed to the mounting boss 101 of the tailstock body 1 by four M6*60 hexagon socket screws, and the hydraulic cylinder piston 4 is fixed to the threaded hole of the locking block 5 by the M12 fine pitch thread thereon. The relative positions of the two parts are adjusted according to the needs of the locking stroke and then fixed by the M12 fine pitch nut 6; during operation, under the control of the machining program, the hydraulic system drives the hydraulic cylinder piston 4 to move left, driving the locking block 5 to move left, and the locking contact arc concave surface 501 of the locking block 5 is close to the outer circle of the tailstock sleeve 2, and the tailstock sleeve 2 is slightly displaced in the radial direction, eliminating the assembly gap between the tailstock body sleeve hole 102 and the outer circle of the tailstock sleeve 2, thereby achieving rigid fixation and ensuring the clamping rigidity of the parts ( Figure 4 As shown, it is in the locked state at this time); in order to prevent the locking block 5 from rotating along its central axis, causing its arc concave surface to be unable to fit the outer cylindrical surface of the tailstock sleeve 2, a groove is cut along the axis on the outer cylindrical surface of the locking block 5, and an M12 fine-thread set screw 7 is used to limit its circumferential position;

[0028] This design structure has been used on the CT63100 inclined bed CNC machine tool designed and developed by our company, and has achieved satisfactory results.

[0029] Compared with the related art, the hydraulic backlash-eliminating locking mechanism for the tailstock sleeve of the inclined bed CNC lathe provided by the utility model has the following beneficial effects:

[0030] The utility model provides a hydraulic anti-backlash locking mechanism for the tailstock sleeve of a slant bed CNC lathe. The locking block 5 can be driven to move laterally through the hydraulic cylinder body 3 and the hydraulic cylinder piston 4 so that the locking contact arc concave surface 501 on the locking block 5 contacts the tailstock sleeve 2, so as to reduce the gap between the tailstock sleeve 2 and the sleeve hole 102 of the tailstock body, which may cause the two parts to produce displacement of unknown direction and size or swing amplitude along the center line under the action of external force. The locking contact arc concave surface 501 can reduce the gap between the tailstock sleeve 2 and the tailstock body. The gap in the sleeve hole 102 may cause the two parts to produce displacement of unknown direction and magnitude or swing amplitude along the center line under the action of external force. The locking block 5 can be installed and fixed on the hydraulic cylinder piston 4 by multiple M12 fine pitch nuts 6, and the locking block 5 can be circumferentially positioned by M12 fine pitch set screws 7. The cylinder head on the hydraulic cylinder body 3 can be fixed by multiple M6*60 hexagon socket screws 9. The top point 10 can complete the pushing action during clamping and the withdrawal action of the top point 10 after processing is completed.

[0031] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A hydraulic anti-backlash locking mechanism for the tailstock sleeve of a slant bed CNC lathe, characterized in that: include: Tailstock body; A mounting boss, wherein the mounting boss is fixedly mounted on the tailstock body; A tailstock body sleeve hole, wherein the tailstock body sleeve hole is arranged on the tailstock body; A tailstock sleeve, the tailstock sleeve being arranged on the sleeve hole of the tailstock body; A hydraulic cylinder body, wherein the hydraulic cylinder body is arranged on the mounting boss; A hydraulic cylinder piston, wherein the hydraulic cylinder piston is arranged on the inner wall of the hydraulic cylinder body; A locking block is arranged at one end of the hydraulic cylinder piston.

2. The hydraulic anti-backlash locking mechanism for the tailstock sleeve of a slant bed CNC lathe according to claim 1 is characterized in that: A locking contact arc concave surface is provided on one side of the locking block, and the locking contact arc concave surface is matched with the tailstock sleeve.

3. The hydraulic anti-backlash locking mechanism for the tailstock sleeve of a slant bed CNC lathe according to claim 1 is characterized in that: The locking block is provided with a plurality of M12 fine-pitch nuts, and the plurality of M12 fine-pitch nuts are all connected to the hydraulic cylinder piston.

4. The hydraulic anti-backlash locking mechanism for the tailstock sleeve of a slant bed CNC lathe according to claim 1 is characterized in that: The tailstock body is provided with an M12 fine-pitch set screw and an M2 fine-pitch nut.

5. The hydraulic anti-backlash locking mechanism for the tailstock sleeve of a slant bed CNC lathe according to claim 1 is characterized in that: The hydraulic cylinder body is provided with a plurality of M6*60 hexagon socket screws.

6. The hydraulic anti-backlash locking mechanism for the tailstock sleeve of a slant bed CNC lathe according to claim 1 is characterized in that: The tailstock sleeve is provided with a top.

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