Tailstock for machine tool

Abstract

The tailstock for the machine tool comprises a sliding seat, a guide rail and a center body, the guide rail is arranged on a machine tool body, the sliding seat is connected to the guide rail in a sliding mode, and a translation driving device used for driving the sliding seat to move is arranged on the machine tool body. The center body is rotationally connected to the sliding base, a replaceable head body is arranged at the front end of the center body, and the material hardness of the head body is larger than that of the center body. The head body comprises a pointed cone part and a connecting part, a connecting groove used for being connected with the connecting part is formed in the center body, and a locking mechanism is arranged between the connecting part and the center body. In the utility model, the head body at the front end of the tip body is replaceable, so that when the front end of the tip part is worn, only the head body needs to be replaced independently, the whole tip part does not need to be replaced, and the replacement cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tools, in particular to a tailstock used for a machine tool. Background Art

[0002] The lathe tailstock is an important part of the lathe, mainly used to support and position the other end of the workpiece. When turning long shaft parts, the tailstock can provide the necessary support to prevent the workpiece from bending and deforming due to its own weight or cutting force, thereby ensuring the processing accuracy.

[0003] Among them, the existing tailstock usually includes a base and a center. The base is installed on the guide rail on the lathe bed. The base can be moved and adjusted along the guide rail. The center is rotatably connected to the base through a bearing, and the center can rotate around its own central axis. When in use, the tip of the center is positioned against the center of the end face of the workpiece through the movement of the base, thereby ensuring the stability of the workpiece during rotation.

[0004] In actual use, it is found that since the tip of the top is in direct contact with the workpiece, the tip of the top is prone to wear during long-term use. Once the wear of the tip of the top reaches a certain degree, it will seriously affect the centering accuracy of the workpiece if it continues to be used. Therefore, it needs to be replaced. The existing top is usually an integrated structure. When replacing it, the entire top needs to be replaced, and the replacement cost is relatively high. Summary of the invention

[0005] The utility model aims to solve the deficiencies in the prior art and provide a tailstock for a machine tool.

[0006] The purpose of the utility model is achieved through the following technical solutions: a tailstock for a machine tool, comprising a sliding seat, a guide rail, and a center body, the guide rail is arranged on a bed, the sliding seat is slidably connected to the guide rail, and the bed is provided with a translation drive device for driving the sliding seat to move; the center body is rotatably connected to the sliding seat, and a replaceable head body is arranged at the front end of the center body, and the material hardness of the head body is greater than the material hardness of the center body; the head body comprises a pointed cone portion and a connecting portion, a connecting groove for connecting the connecting portion is provided on the center body, and a locking mechanism is provided between the connecting portion and the center body.

[0007] In this utility model, the tip body and the head body at the front end together form a complete tip component. Considering that the head body at the front end of the tip body will be in direct contact with the workpiece, the head body is made of a material with relatively high hardness, so that it has relatively high wear resistance, can reduce the wear when contacting the workpiece, and thus improve its service life. Since the tip body is not in direct contact with the workpiece and has relatively low hardness requirements, the tip body is made of a material with relatively low hardness, making the tip body easy to manufacture and controlling the manufacturing cost of the tip body. In the above way, while ensuring that the front end of the tip component has good wear resistance, the manufacturing cost of the entire tip component is effectively controlled. Moreover, the head body at the front end of the tip body is replaceable. In this way, when the front end of the tip component is worn, only the head body needs to be replaced separately, without replacing the entire tip component, which greatly reduces the replacement cost.

[0008] Preferably, the head body is made of tungsten alloy.

[0009] Preferably, the tip body is made of alloy steel.

[0010] Preferably, the locking mechanism includes a groove provided on the connecting portion, a guiding groove provided on the tip body and corresponding to the groove, a first inclined surface provided on one side of the groove; the guiding groove is communicated with the connecting groove, a wedge block is slidably connected in the guiding groove, and a second inclined surface matched with the first inclined surface is provided at one end of the wedge block; a threaded hole is provided at the end of the guiding groove far from the connecting groove, and a tightening screw for tightening the wedge block is connected in the threaded hole.

[0011] Preferably, the connecting portion is in the shape of a cuboid.

[0012] Preferably, the translation driving device is a hydraulic cylinder.

[0013] The beneficial effect of this utility model is that in this utility model, the head body at the front end of the tip body is replaceable. In this way, when the front end of the tip component is worn, only the head body needs to be replaced separately, without replacing the entire tip component, which greatly reduces the replacement cost. Description of the Drawings

[0014] Figure 1 is a structural schematic diagram of this utility model.

[0015] Figure 2 is a partial cross-sectional view of this utility model.

[0016] Figure 3 is Figure 2 the enlarged view of part A in

[0017] Figure 4 is a structural schematic diagram of the head body.

[0018] In the figure: 1. Bed body, 2. Guide rail, 3. Sliding seat, 4. Translation drive device, 5. Center body, 5-1. Connecting groove, 5-2. Guide groove, 6. Head body, 6-1. Tapered part, 6-2. Connecting part, 6-2a. Groove, 6-2b. First inclined surface, 7. Wedge block, 8. Tightening screw. Detailed implementation manner

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the protection scope of the present invention.

[0020] As Figures 1 to 4 shown, a tailstock for a machine tool includes a sliding seat 3, a guide rail 2, and a center body 5. The guide rail 2 is arranged on the bed body 1, the sliding seat 3 is slidably connected to the guide rail 2, and a translation drive device 4 for driving the sliding seat 3 to move is arranged on the bed body 1. In this embodiment, the translation drive device 4 is a hydraulic cylinder. The cylinder body of the hydraulic cylinder is fixed to the bed body 1, and the piston rod on the hydraulic cylinder is connected to the sliding seat 3.

[0021] The center body 5 is rotatably connected to the sliding seat 3, a replaceable head body 6 is arranged at the front end of the center body 5, and the material hardness of the head body 6 is greater than that of the center body 5; the head body 6 includes a tapered part 6-1 and a connecting part 6-2, a connecting groove 5-1 for connecting the connecting part 6-2 is arranged on the center body 5, and a locking mechanism is arranged between the connecting part 6-2 and the center body 5.

[0022] Among them, the tapered part 6-1 is a cone, and the connecting part 6-2 is a cuboid.

[0023] In the present invention, the center body 5 and the front head body 6 together form a complete center component. Considering that the front head body 6 of the center body 5 will be in direct contact with the workpiece, the head body 6 is made of a material with a higher hardness, so that it has a higher wear resistance, can reduce the wear when contacting the workpiece, and thus improve its service life; and since the center body 5 is not in direct contact with the workpiece and has relatively low hardness requirements, the center body 5 is made of a material with a relatively low hardness, so that the center body 5 is easy to manufacture to control the manufacturing cost of the center body 5; through the above method, while ensuring that the front end of the center component has good wear resistance, the manufacturing cost of the entire center component is effectively controlled. Moreover, the head body 6 at the front end of the center body 5 is replaceable. In this way, when the front end of the center component is worn, only the head body 6 needs to be replaced separately, and there is no need to replace the entire center component, which greatly reduces the replacement cost.

[0024] Specifically, the locking mechanism includes a groove 6-2a provided on the connecting portion 6-2, a guiding groove 5-2 provided on the tip body 5 and corresponding to the groove 6-2a, and a first inclined surface 6-2b provided on one side of the groove 6-2a. The guiding groove 5-2 communicates with the connecting groove 5-1, and a wedge 7 is slidably connected in the guiding groove 5-2. One end of the wedge 7 is provided with a second inclined surface that cooperates with the first inclined surface 6-2b. A threaded hole is provided at the end of the wire groove away from the connecting groove 5-1, and a tightening screw 8 for tightening the wedge 7 is connected in the threaded hole.

[0025] Among them, the grooves 6-2a are respectively provided on both sides of the connecting portion 6-2, and the guiding grooves 5-2 are respectively provided on both sides of the connecting groove 5-1; when installing the head body 6, first insert the connecting portion 6-2 on the head body 6 into the connecting groove 5-1 and align the groove 6-2a with the guiding groove 5-2; then rotate the tightening screw 8 to push the tightening screw 8 to move the wedge 7 in the direction of the groove 6-2a and tighten the wedge 7; during the process of tightening the wedge 7, through the interaction between the first inclined surface 6-2b and the second inclined surface, a pressure is applied to the connecting portion 6-2 in the direction of the bottom of the connecting groove 5-1, so that the head body 6 can be firmly fixed on the tip body 5.

[0026] Furthermore, the head body 6 is made of tungsten alloy. Tungsten alloy has good hardness and wear resistance, which can improve the service life of the head body 6. The tip body 5 is made of alloy steel.

[0027] The present utility model is not limited to the above best implementation mode. Anyone can obtain other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in its shape or structure, as long as it has the same or similar technical solutions as this application, it falls within the protection scope of the present utility model.

Claims

1. A tailstock for a machine tool, characterized in that: It includes a sliding seat, a guide rail, and a top body. The guide rail is arranged on the bed, the sliding seat is slidably connected to the guide rail, and the bed is provided with a translation drive device for driving the sliding seat to move; the top body is rotatably connected to the sliding seat, and a replaceable head body is arranged at the front end of the top body, and the material hardness of the head body is greater than the material hardness of the top body; the head body includes a pointed cone part and a connecting part, a connecting groove for connecting the connecting part is provided on the top body, and a locking mechanism is provided between the connecting part and the top body.

2. A tailstock for a machine tool according to claim 1, characterized in that: The head body is made of tungsten alloy.

3. A tailstock for a machine tool according to claim 1, characterized in that: The top body is made of alloy steel.

4. A tailstock for a machine tool according to any one of claims 1 to 3, characterized in that: The locking mechanism includes a groove arranged on the connecting part, a guide groove arranged on the top body and corresponding to the groove, a first inclined surface is arranged on one side of the groove; the guide groove is connected to the connecting groove, a wedge block is slidably connected in the guide groove, and one end of the wedge block is provided with a second inclined surface matching the first inclined surface; a threaded hole is provided at one end of the wire groove away from the connecting groove, and a tightening screw for tightening the wedge block is connected in the threaded hole.

5. A tailstock for a machine tool according to any one of claims 1 to 3, characterized in that: The connecting portion is in the shape of a rectangular parallelepiped.

6. A tailstock for a machine tool according to any one of claims 1 to 3, characterized in that: The translation driving device is a hydraulic cylinder.

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