Self-centering driving ejector rod tool

Abstract

The utility model belongs to the technical field of high-speed rotating material removing machining tools, and particularly relates to a self-centering driving ejector rod tool which comprises a locking clamping sleeve and an ejector rod inserted into the locking clamping sleeve, a cone is arranged at the end of the ejector rod, and an annular groove is formed in the position, close to the cone, of the ejector rod. The cone comprises a first-stage conical surface serving as a cone tip and a second-stage conical surface close to the annular groove, and a plurality of tooth-shaped teeth are annularly distributed on the second-stage conical surface. Compared with the prior art, the fixture has the beneficial effects that the fixture is used for positioning and driving the cylindrical part, and the clamping of the outer circumferential surface of the cylindrical part by the existing fixture such as a three-jaw chuck is avoided during processing, so that the interference generated when the outer circumferential surface and the end surface of the end part of the cylindrical part are processed is avoided; and the cylinder part does not need to be turned to be repositioned and machined, and can be directly clamped, machined and formed at a time.

Description

Technical Field

[0001] This utility model belongs to the field of high-speed rotary unloading machining tooling technology, specifically relating to a self-centering drive push rod tooling. Background Technology

[0002] In the machining industry, high-speed rotary machining is very common. The dimensional and positional accuracy of parts produced by this method is limited by the number of clamping operations during machining. Generally, parts machined in a single clamping operation have higher dimensional and positional accuracy than those machined in multiple clamping operations. For a cylindrical part, multiple clamping operations are usually used to remove material from its outer diameter and two end faces. However, when the positional accuracy requirements for the outer diameter and end faces are high, multiple clamping operations cannot meet the requirements, and a single-clamping machining method should be used. However, existing machining methods and tooling cannot support single-clamping machining. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a self-centering driven push rod tooling, which can realize one-time clamping and forming.

[0004] The purpose of this utility model is achieved by the following technical solution. A self-centering drive push rod tooling according to this utility model includes a locking sleeve and a push rod inserted into the locking sleeve. The end of the push rod is provided with a cone, and an annular groove is provided near the cone. The cone includes a primary conical surface as the tip of the cone and a secondary conical surface near the annular groove, with multiple teeth distributed circumferentially on the secondary conical surface.

[0005] Compared with the prior art, the advantages of this utility model are:

[0006] This tooling is used to position and drive cylindrical parts. During processing, it avoids clamping the outer circumference of cylindrical parts with existing tooling such as three-jaw chucks, thereby avoiding interference when processing the outer circumference and end face of the cylindrical parts. There is no need to turn the cylindrical parts over for repositioning and processing. They can be directly clamped and processed in one go.

[0007] The annular groove allows the cutting tool to avoid obstruction when machining the end face of a cylindrical part. The cone is inserted into the cone hole of the cylindrical part, and the annular groove is exposed on the outside of the cylindrical part. When the cutting tool is machining the end face of the cylindrical part, when the cutting tool moves to a position close to the center of the end face, it can extend into the annular groove to achieve complete machining of the end face.

[0008] The locking cone sleeve and push rod can be flexibly disassembled and assembled, enabling quick replacement and maintenance of different types of tooling.

[0009] Furthermore, the push rod includes a first cylinder for insertion into the locking sleeve, a second cylinder with a diameter smaller than that of the first cylinder on its end face, and a third cylinder with a diameter smaller than that of the first cylinder but larger than that of the second cylinder on its end face. The end face of the first cylinder, the outer circumferential surface of the second cylinder, and the end face of the third cylinder form an annular groove.

[0010] Compared with the prior art, the advantages of this utility model are:

[0011] The diameter of the third cylinder is smaller than that of the first cylinder, which can reduce the diameter of the tapered hole on the end face where the cylindrical part mates with the third cylinder, thus reducing the impact on the overall performance of the cylindrical part.

[0012] Furthermore, the end face of the third cylinder is provided with a cone, and the diameter of the third cylinder is equal to the diameter of the bottom of the cone.

[0013] Compared with the prior art, the advantages of this utility model are:

[0014] The diameter of the third cylinder is equal to the diameter of the bottom of the cone, which allows the third cylinder to be inserted into the conical hole of the cylindrical part, thus avoiding interference with the cutting tool.

[0015] Furthermore, the secondary conical surface and the third cylinder near the secondary conical surface are distributed with multiple concave grooves. The bottom surface of the concave groove is an arc-shaped concave surface, and tooth-shaped teeth are formed between adjacent concave grooves.

[0016] Compared with the prior art, the advantages of this utility model are:

[0017] The concave groove can increase the depth of the groove, thereby increasing the height of the tooth profile. When this tooling is used with cylindrical parts, it can increase the indentation against the inner wall of the tapered hole, increase the friction, and prevent slippage.

[0018] Furthermore, the angle between the first-level conical surface and the axis of the cone is smaller than the angle between the second-level conical surface and the axis of the cone.

[0019] Compared with the prior art, the advantages of this utility model are:

[0020] The secondary conical surface has a large angle with the axis. When the tool is inserted into the conical hole of the cylindrical part, it can increase the squeezing force with the inner wall of the conical hole, increase the indentation, thereby increasing the friction and preventing slippage.

[0021] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of an embodiment of a self-centering drive push rod tool according to the present invention;

[0023] Figure 2 for Figure 1 Front view of

[0024] Figure 3 for Figure 2 A cross-sectional schematic diagram;

[0025] Figure 4 for Figure 1 Enlarged view of point A in the middle;

[0026] Figure 5 This is a schematic diagram showing the fit between a self-centering drive push rod tooling embodiment of the present invention and the cylindrical part to be processed.

[0027] [Attached image labels]

[0028] 1-Locking sleeve;

[0029] 2-Push rod;

[0030] 21-First cylinder;

[0031] 22-Second cylinder;

[0032] 23-The third cylinder;

[0033] 24-cone;

[0034] 241 - First-order conical surface;

[0035] 242-Secondary Conical Surface;

[0036] 243 - Concave groove;

[0037] 244-tooth shape;

[0038] 3-Cylindrical parts. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] An embodiment of the self-centering driven push rod tooling of this utility model is as follows: Figures 1 to 5 As shown, hereinafter referred to as tooling.

[0041] The fixture includes a locking sleeve 1 and a push rod 2. In this embodiment, the locking sleeve 1 is a high-precision locking sleeve 1, and one end of the push rod 2 is inserted into the locking sleeve 1 and fixed to the locking sleeve 1 as a whole by the locking mechanism of the locking sleeve 1. The locking sleeve 1 is prior art and will not be described in detail here.

[0042] Typically, the locking sleeve 1 is installed on a lathe. The rotation of the lathe's drive shaft drives the locking sleeve 1 to rotate, which in turn drives the push rod 2 to rotate. When the push rod 2 and the center at the other end of the lathe are clamped at both ends of the cylindrical part 3, the cylindrical part 3 can be driven to rotate, thereby performing high-speed rotational material removal processing on the cylindrical part 3.

[0043] The rotation center line of the lathe drive shaft coincides with the rotation center line of the locking sleeve 1 and the push rod 2. Both the locking sleeve 1 and the push rod 2 are rotating structures.

[0044] The other end of the push rod 2 is used to engage with the tapered hole on the end face of the cylindrical part 3 to center the cylindrical part 3 and drive the cylindrical part 3 to rotate.

[0045] The push rod 2 includes a first cylinder 21, a second cylinder 22, a third cylinder 23, and a cone 24. One end of the first cylinder 21 is inserted and fixed in the locking sleeve 1, and the other end has a second cylinder 22 on its end face. The diameter of the second cylinder 22 is smaller than the diameter of the first cylinder 21. The other end of the second cylinder 22 has a third cylinder 23 on its end face. The diameter of the third cylinder 23 is larger than the diameter of the second cylinder 22 and smaller than the diameter of the first cylinder 21, thereby forming an annular groove on the end face of the first cylinder 21, the outer circumferential surface of the second cylinder 22, and the end face of the third cylinder 23.

[0046] The other end face of the third cylinder 23 is provided with a cone 24. The bottom diameter of the cone 24 is equal to the diameter of the third cylinder 23. The cone surface of the cone 24 includes two angles, forming a first-level cone surface 241 and a second-level cone surface 242. The first-level cone surface 241 is the tip of the cone 24. The angle between the first-level cone surface 241 and the axis of the cone is slightly smaller than the angle between the second-level cone surface 242 and the axis.

[0047] The first-level conical surface 241 is smooth. The second-level conical surface 242 and the third cylinder 23 near the second-level conical surface 242 are circumferentially distributed with multiple concave grooves 243. The bottom surface of the concave groove 243 is an arc-shaped concave surface, and a tooth 244 is formed between two adjacent concave grooves 243.

[0048] The working process of the tooling of this utility model is as follows: a tapered hole is provided at the middle position of both ends of the cylindrical part 3. The tapered hole on one end of the cylindrical part 3 is engaged with the center on the lathe, and the other end is engaged with the tooling of this utility model. The first-stage tapered surface 241 and the center achieve self-centering positioning of the cylindrical part 3 by engaging with the corresponding tapered hole. The toothed teeth 244 are pressed against the inner wall of the tapered hole of the cylindrical part 3. The cutting edge of the toothed teeth 244 is slightly embedded in the inner wall of the tapered hole, forming an indentation, which increases the friction between the push rod 2 and the cylindrical part 3. The tooling rotates, driving the cylindrical part 3 to rotate, and then the outer circumferential surface and end face of the cylindrical part 3 are subjected to high-speed rotational material removal processing.

[0049] The tooling and center are used to position and drive the cylindrical part 3. During processing, the clamping of the outer circumference of the cylindrical part by existing tooling such as the three-jaw chuck is avoided, thereby avoiding interference when processing the outer circumference and end face of the cylindrical part. There is no need to turn the cylindrical part over for repositioning and processing. It can be directly clamped and processed in one go.

[0050] The annular groove allows the cutting tool to avoid obstruction when machining the end face of the cylindrical part 3. The cone 24 and the third cylinder 23 are inserted into the cone hole of the cylindrical part, and the annular groove is exposed on the outside of the cylindrical part 3. When the cutting tool is machining the end face of the cylindrical part, when the cutting tool moves to a position close to the center of the end face, it can extend into the annular groove to achieve complete machining of the end face.

[0051] The diameter of the third cylinder 23 is smaller than that of the first cylinder 21, which can reduce the diameter of the end face tapered hole where the cylindrical part mates with the third cylinder 23, and reduce the impact on the overall performance of the cylindrical part.

[0052] The secondary conical surface 242 has a large angle with the axis. When the tooling is inserted into the conical hole of the cylindrical part 3, it can increase the squeezing force with the inner wall of the conical hole, increase the indentation, thereby increasing the friction and preventing slippage.

[0053] The concave groove 243 can increase the depth of the groove, thereby increasing the height of the tooth 244. When this tooling is used with the cylindrical part 3, it can increase the indentation on the inner wall of the conical hole, increase the friction, and prevent slippage.

[0054] The locking cone sleeve 1 and the push rod 2 can be flexibly disassembled and assembled, enabling quick replacement and maintenance of tooling of different models.

[0055] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A self-centering driven push rod fixture, comprising a locking sleeve and a push rod inserted into the locking sleeve, characterized in that: The end of the push rod is provided with a cone, and the push rod is provided with an annular groove near the cone; the cone includes a primary cone surface as the tip of the cone and a secondary cone surface near the annular groove, and the secondary cone surface is provided with multiple teeth distributed circumferentially.

2. The self-centering drive push rod tooling according to claim 1, characterized in that: The push rod includes a first cylinder for insertion into the locking sleeve. The end face of the first cylinder has a second cylinder with a diameter smaller than that of the first cylinder. The end face of the second cylinder has a third cylinder with a diameter smaller than that of the first cylinder but larger than that of the second cylinder. The end face of the first cylinder, the outer circumferential surface of the second cylinder, and the end face of the third cylinder form an annular groove.

3. The self-centering drive push rod tooling according to claim 2, characterized in that: The end face of the third cylinder is provided with a cone, and the diameter of the third cylinder is equal to the diameter of the bottom of the cone.

4. The self-centering drive push rod tooling according to claim 3, characterized in that: The secondary conical surface and the third cylinder near the secondary conical surface are distributed with multiple concave grooves. The bottom surface of the concave groove is an arc-shaped concave surface, and tooth-shaped teeth are formed between adjacent concave grooves.

5. The self-centering drive push rod tooling according to claim 1, characterized in that: The angle between the first-level conical surface and the axis of the cone is smaller than the angle between the second-level conical surface and the axis of the cone.

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