Thin-wall cylinder machining method, cutter and tool

Abstract

The invention provides a thin-wall cylinder machining method, a cutter and a tool, and belongs to the field of titanium alloy thin-wall part machining. The problems that machining raw materials of a traditional revolving body type thin-wall easily-deformed titanium alloy structure are seriously wasted, and the effective efficiency is low are solved. A thin-wall cylinder machining method comprises the following steps that S1, after a workpiece is clamped, an inner hole of the workpiece is cut through a cutter, the redundant part in the middle of the workpiece forms a bar, and the workpiece forms a cylinder; s2, carrying out heat treatment on the barrel; and S3, a tool is adopted for fixing the cylinder subjected to heat treatment, and then the inner hole and the outer diameter of the cylinder are subjected to numerical control finish turning. The device is mainly used for machining thin-wall cylinders.

Description

Technical Field

[0001] The present invention belongs to the field of machining of titanium alloy thin-walled parts, and particularly relates to a machining method, a tool and a tooling for a thin-walled cylinder body. Background Art

[0002] Titanium alloy has many advantages such as light weight, high strength and corrosion resistance. However, at room temperature, titanium alloy has low plasticity, large resilience and high deformation resistance. Therefore, when machining such cylinder parts in the industry, there are defects such as large deformation and difficulty in ensuring dimensional requirements. The calcium ion exchange column is a typical machined product of titanium alloy thin-walled products in aerospace products. This product is difficult to machine and has a low yield rate.

[0003] For the thin-walled and easily deformable titanium alloy structure of the rotary body type, the part belongs to the cylindrical cylinder type. In the industry, the traditional processing method uses a common lathe to clamp the outer circle of the part with a three-jaw chuck, and then processes the outer diameter at one end, drills a hole, then processes the other end of the part, numerically controls the lathe to rough machine the inner hole, rough machine the outer diameter, performs heat treatment to eliminate machining stress, the lathe worker finely machines the inner hole, and finely machines the outer diameter to complete the machining and manufacturing. After the product is processed, there are tool marks, and the surface finish is not good. And the outer diameter of this product is Φ80±0.3, the inner hole is The maximum wall thickness is 0.75mm, the minimum wall thickness is 0.425mm, and the final overall length of the cylinder is 272mm. If the traditional processing method is used, it is easy to deform, the dimensions are unstable, the raw materials are wasted, the working hours are consumed greatly, the rejection rate is high, the production efficiency is low, and the dimensional requirements of the product cannot be guaranteed. Summary of the Invention

[0004] In view of this, the present invention aims to provide a machining method, a tool and a tooling for a thin-walled cylinder body to solve the problems of serious waste of processing raw materials, low production efficiency and the like in the machining of the traditional thin-walled and easily deformable titanium alloy structure of the rotary body type.

[0005] To achieve the above object, according to one aspect of the present invention, a machining method for a thin-walled cylinder body is provided, including the following steps:

[0006] S1. After clamping the workpiece, use a tool to cut the inner hole of the workpiece so that the redundant part in the middle of the workpiece forms a bar, and the workpiece forms a cylinder body;

[0007] S2. Perform heat treatment on the cylinder body;

[0008] S3. Use the tooling to fixedly bond the heat-treated cylinder body, and then numerically control the fine turning of the inner hole and the outer diameter of the cylinder body.

[0009] Furthermore, the fixing method for the cylinder body in S3 is to glue the outer wall of the tooling and then sleeved the cylinder body on the outer wall of the tooling.

[0010] Furthermore, the diameter of the workpiece is greater than Φ50mm.

[0011] According to another aspect of the present invention, there is provided a tool applied to the above-mentioned method for machining a thin-walled cylinder, and an opening is provided on one side of the tool facing the workpiece.

[0012] Furthermore, the length of the opening is greater than or equal to the axial length of the workpiece.

[0013] According to another aspect of the present invention, there is provided a tooling applied to the above-mentioned method for machining a thin-walled cylinder. The tooling is integrally in a stepped cylindrical shape and includes a plurality of cylindrical sections.

[0014] Furthermore, the outer wall of at least one of the cylindrical sections is adapted to the inner diameter of the cylinder.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. By providing a tool and providing an opening on one side of the machining surface of the tool, the present invention can directly perform opening machining during the machining process as the tool rotates, so that the waste material cut in the middle forms a bar and can be reused, saving raw materials.

[0017] 2. By providing a tool and providing an opening on one side of the machining surface of the tool, the present invention can improve the efficiency of machining the opening and improve the working efficiency.

[0018] 3. By providing the tooling, the present invention can improve the fixing strength, prevent the cylindrical workpiece from deforming, and improve the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0020] Figure 1 is a flowchart of the method for machining a thin-walled cylinder according to the present invention;

[0021] Figure 2 is a state diagram of the tool cutting the workpiece according to the present invention;

[0022] Figure 3 is a schematic diagram of the mating state of the tooling and the workpiece according to the present invention.

[0023] Tool 1; Workpiece 2; Special tooling 3; Cylinder 4. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0025] It should be noted that the descriptions of directions such as "left", "right", "left side", "right side", "upper part", "lower part", "top", "bottom", etc. in the present invention are all defined based on the orientation or position relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the described structure must be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In the description of the present invention, the meaning of "a plurality" is more than two, unless otherwise specifically defined.

[0026] In the description of the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0027] Referring to the accompanying drawings to illustrate this embodiment, according to one aspect of the present invention, a method for processing a thin-walled cylinder is provided, including the following steps:

[0028] S1. After clamping the workpiece, use tool 1 to cut the inner hole of the workpiece, so that the redundant part in the middle of the workpiece forms a bar, and the workpiece forms a cylinder 4; through this cutting method, the proportion of waste can be reduced to the lowest, and the bar stock can be reused.

[0029] S2. Perform heat treatment on the cylinder 4; the heat treatment adopts the traditional heat treatment method for titanium alloy, and select heat treatment parameters according to actual needs. The heat treatment method can be the existing technology and will not be elaborated here.

[0030] S3. Use tooling 3 to adhesively fix the heat-treated cylinder 4, and then numerically control the precision turning of the inner hole and outer diameter of the cylinder 4.

[0031] In this embodiment, the fixing method of the cylinder 4 in S3 is to sleeve the cylinder 4 on the outer wall of the tooling 3 after gluing on the outer wall of the tooling 3. By the way of clamping and gluing, the connection strength of the fixation can be improved, and at the same time, the deformation influence on the cylinder caused by the traditional three-jaw chuck fixing method can be prevented.

[0032] In this embodiment, the diameter of the workpiece is greater than Φ50mm.

[0033] According to another aspect of the present invention, there is provided a tool for use in the above-described method for machining a thin-walled cylinder, wherein an opening is provided on the side of the tool 1 facing the workpiece.

[0034] In this embodiment, the length of the opening is greater than or equal to the axial length of the workpiece. By setting it in this way, it can be ensured that during turning, the workpiece can be smoothly penetrated, helping to form a complete bar after the middle of the workpiece is penetrated. At the same time, the one-time through-turning machining method can ensure high work efficiency. Compared with the traditional turning method, it saves about half of the time and has high machining efficiency.

[0035] According to another aspect of the present invention, there is provided a tooling for use in the above-described method for machining a thin-walled cylinder, wherein the tooling 3 is integrally in the shape of a stepped cylinder and includes a plurality of cylindrical sections. This setting method can improve the adaptability to the opening sizes of different workpieces and increase the economic benefit ratio. When facing different cylinder machining sizes, there is no need to repeatedly replace the fixture.

[0036] In this embodiment, the outer wall of at least one of the cylindrical sections is adapted to the inner diameter of the cylinder 4.

[0037] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. According to the content of this specification, many modifications and changes can be made. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the art can well understand and utilize the present invention.

Claims

1. A method for processing a thin-walled cylinder, characterized in that, Including the following steps: S1. After clamping the workpiece, use the cutting tool (1) to cut the inner hole of the workpiece, so that the redundant part in the middle of the workpiece forms a bar, and the workpiece forms a cylinder body (4); S2. Heat-treat the cylinder body (4); S3. Use the tooling (3) to adhesively fix the heat-treated cylinder body (4), and then numerically control the precision turning of the inner hole and outer diameter of the cylinder body (4).

2. The method for processing a thin-walled cylinder according to claim 1, characterized in that: The fixing method of the cylinder body (4) in S3 is to sleeve the cylinder body (4) on the outer wall of the tooling (3) after gluing on the outer wall of the tooling (3).

3. A method for processing a thin-walled cylinder according to claim 1, characterized in that: The diameter of the workpiece is greater than Φ50mm.

4. A tool applied to a method for machining a thin-walled cylinder as described in claim 1, 2 or 3, characterized in that: The cutting tool (1) is provided with an opening on the side facing the workpiece.

5. A cutting tool according to claim 4, characterized in that: The length of the opening is greater than or equal to the axial length of the workpiece.

6. A tooling applied to a thin-walled cylinder processing method as described in claim 1, 2 or 3, characterized in that: The tooling (3) is integrally in the shape of a stepped cylinder and includes a plurality of cylindrical segments.

7. The fixture according to claim 6, wherein: The outer wall of at least one of the cylindrical segments is adapted to the inner diameter of the cylinder body (4).

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