High-precision micro deep hole machining method for stainless steel special-shaped valve body

Abstract

The embodiment of the invention provides a high-precision micro deep hole machining method for a stainless steel special-shaped valve body, which comprises the following steps: firstly, machining a positioning hole with a first depth at a specified position of the stainless steel special-shaped valve body by using a numerical control machine tool, and then manually drilling a machining hole with a second depth at the positioning hole; the sum of the first depth and the second depth is equal to the depth of the tiny deep hole, the advantage of high positioning precision of a numerical control machine tool is fully played, the advantage of flexible control of cutting force and feeding amount of manual drilling can also be played, the drilling quality of the tiny deep hole is guaranteed, and the machining efficiency of the high-precision tiny deep hole of the stainless steel special-shaped valve body is also guaranteed.

Description

Technical Field

[0001] The present application relates to the field of mechanical processing technology, and in particular to a method for processing high-precision micro deep holes in a stainless steel special-shaped valve body. Background Art

[0002] Figure 1 This is a schematic diagram of a stainless steel special-shaped valve body. Figure 1 As shown, a stainless steel special-shaped valve body 100 has a high-precision micro-deep hole 200 with a diameter of 1.2 mm and a depth of 20 mm. Its aspect ratio is about 1:17, which belongs to micro-deep hole processing.

[0003] In the prior art, deep holes are drilled using machine tools. However, the part is made of stainless steel, which is difficult to machine. Furthermore, due to the small hole diameter and large hole depth, the drill bit is weak, and drill bit breakage is a common problem during the drilling process. Furthermore, due to the small hole diameter, a broken drill bit is difficult to remove, ultimately resulting in the entire part being scrapped, significantly increasing processing costs and compromising part processing efficiency. Summary of the Invention

[0004] The embodiment of the present application provides a high-precision method for machining tiny deep holes in a stainless steel special-shaped valve body, which is used to solve the problem in the prior art that tiny deep holes in a stainless steel special-shaped valve body are difficult to machine.

[0005] The present invention provides a method for machining high-precision micro-deep holes in a stainless steel special-shaped valve body, comprising:

[0006] Use a CNC machine tool to process a positioning hole of the first depth at a specified position of the stainless steel special-shaped valve body;

[0007] Manually drilling a machining hole of a second depth at the positioning hole;

[0008] The sum of the first depth and the second depth is equal to the depth of the micro deep hole.

[0009] In a feasible implementation, the high-precision micro-deep hole machining method for a stainless steel special-shaped valve body further includes:

[0010] After the other dimensions of the stainless steel special-shaped valve body are processed, the positioning hole is processed using the CNC machine tool.

[0011] In a feasible implementation, the size of the positioning hole is configured to be φ1.2 mm.

[0012] In a feasible implementation, after the other dimensions of the stainless steel special-shaped valve body are processed, the positioning hole is processed using the same CNC machine tool without changing the clamping position of the stainless steel special-shaped valve body.

[0013] In a feasible implementation, after the other dimensions of the stainless steel special-shaped valve body are processed, the drill bit of the CNC machine tool is replaced;

[0014] In a feasible implementation, the positioning hole meets the shape and position tolerance requirements of the high-precision micro deep hole.

[0015] In a feasible implementation, manually drilling a machining hole of the second depth at the positioning hole includes:

[0016] Aligning the positioning hole;

[0017] The processing hole is manually drilled at the position of the positioning hole using a manual drilling tool.

[0018] In a feasible implementation, during the manual drilling of the processed hole, the wear condition of the drill bit of the manual drilling tool is judged according to the magnitude of the cutting force to control the feed rate of the drill bit.

[0019] In a feasible implementation, the drill bit is configured as a common high-speed steel drill bit.

[0020] In a feasible implementation, the depth of the positioning hole is 1 / 8-1 / 7 of the depth of the micro deep hole.

[0021] An embodiment of the present application provides a method for processing high-precision micro-deep holes in a stainless steel special-shaped valve body. First, a positioning hole of a first depth is processed at a specified position of the stainless steel special-shaped valve body using a CNC machine tool, and then a processing hole of a second depth is manually drilled at the positioning hole; the sum of the first depth and the second depth is equal to the depth of the micro-deep hole, which fully utilizes the advantages of the high positioning accuracy of the CNC machine tool and the advantages of flexible control of cutting force and feed rate by manual drilling, thereby ensuring not only the drilling quality of the micro-deep holes, but also the processing efficiency of the high-precision micro-deep holes in the stainless steel special-shaped valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present application and do not constitute improper limitations on the present invention.

[0023] In the attached figure:

[0024] Figure 1 It is a schematic diagram of a stainless steel special-shaped valve body;

[0025] Figure 2 This is a flow chart of a method for high-precision micro-deep hole machining of a stainless steel special-shaped valve body provided in one embodiment of the present application.

[0026] Description of reference numerals:

[0027] 100-stainless steel special-shaped valve body; 200-micro deep hole. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will provide a clear and complete description of the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0029] In the description of the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "plurality" is at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0030] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0031] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0032] Figure 1 This is a schematic diagram of a stainless steel special-shaped valve body. Figure 1 As shown, a stainless steel special-shaped valve body 100 has a high-precision micro-deep hole 200 with a diameter of 1.2 mm and a depth of 20 mm. Its aspect ratio is about 1:17, which belongs to micro-deep hole processing.

[0033] In the prior art, deep holes are drilled using machine tools. However, the part is made of stainless steel, which is difficult to machine. Furthermore, due to the small hole diameter and large hole depth, the drill bit is weak, and drill bit breakage is a common problem during the drilling process. Furthermore, due to the small hole diameter, a broken drill bit is difficult to remove, ultimately resulting in the entire part being scrapped, significantly increasing processing costs and compromising part processing efficiency.

[0034] In order to ensure the processing quality and efficiency of high-precision tiny deep holes in stainless steel special-shaped valve bodies, an embodiment of the present application provides a high-precision tiny deep hole processing method for stainless steel special-shaped valve bodies. The scheme provided by the embodiment of the present application will be described in detail below in conjunction with the drawings in the specification.

[0035] A stainless steel, special-shaped valve body features a tiny, high-precision deep hole measuring 1.2 mm in diameter and 20 mm deep. Its aspect ratio is approximately 1:17. This part is made of difficult-to-machine stainless steel. Due to the small hole diameter, deep hole depth, and high precision requirements, chip evacuation is poor during drilling. The drill bit used is weak and suffers from severe wear during drilling. The tiny deep hole is produced using a CNC machine tool. The machine's drilling feed rate and chip removal are limited to programmed values, making it impossible to detect drill wear and cutting force changes during machining. Consequently, the worn drill bit frequently breaks due to the high cutting forces. Manual drilling of this tiny deep hole allows users to sense drill wear and cutting force changes by hand, control drill feed rate and retraction to avoid drill breakage. However, this tiny deep hole has high coaxiality requirements with the reference, so alignment is required before drilling to determine the hole center. This alignment operation requires repeated operation using a dial indicator, which takes a long time and results in extremely low processing efficiency. After analyzing the advantages and disadvantages of the two drilling solutions, the two processing solutions were considered for combined use to complete the drilling of this tiny deep hole.

[0036] Figure 2 This is a flow chart of a method for high-precision micro-deep hole machining of a stainless steel special-shaped valve body provided in one embodiment of the present application.

[0037] The present invention provides a method for machining high-precision micro-deep holes in a stainless steel special-shaped valve body, comprising:

[0038] S100: First, a positioning hole of a first depth is machined at a designated position of the stainless steel special-shaped valve body using a CNC machine tool.

[0039] For example, the method for high-precision, micro-deep hole machining in a stainless steel special-shaped valve body further includes: after completing machining of other dimensions of the stainless steel special-shaped valve body, replacing the drill bit of the CNC machine tool. Without changing the clamping position of the stainless steel special-shaped valve body, the same CNC machine tool is used to drill the locating holes. This reduces the time required for manual drilling. This method leverages the high positioning accuracy of CNC machine tools, allowing the locating holes to be drilled in a single clamping operation, eliminating the time required for manual drilling.

[0040] For example, the size of the positioning hole is configured to be φ1.2 mm. The depth of the positioning hole can be 1 / 8-1 / 7 of the depth of the micro deep hole. The positioning hole machined by the CNC machine tool meets the geometric tolerance requirements of high-precision micro deep holes.

[0041] S200: Manually drill a second depth hole at the positioning hole.

[0042] Specifically, the sum of the first depth and the second depth is equal to the depth of the micro deep hole.

[0043] Additionally, a second depth of machining hole is manually drilled at the location of the positioning hole, including aligning the positioning hole. A machining hole is then manually drilled at the location of the positioning hole using a manual drilling tool. During the drilling process, the wear of the drill bit of the manual drilling tool can be determined based on the cutting force, thereby controlling the drill bit feed rate and preventing the drill bit from breaking in the machining hole.

[0044] In addition, exemplarily, the drill bit used by the manual drilling tool is configured as a common high-speed steel drill bit.

[0045] It is understandable that processing tiny deep holes by CNC machine tools and manual drilling methods in turn fully utilizes the advantages of high positioning accuracy of CNC machine tools and the advantages of flexible control of cutting force and feed rate of manual drilling, which not only ensures the drilling quality of tiny deep holes, but also ensures the processing efficiency of high-precision tiny deep holes in stainless steel special-shaped valve bodies.

[0046] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application based on the several embodiments provided in the present application to obtain other embodiments, and these embodiments do not exceed the scope of protection of the present application.

[0047] The above specific implementation methods further explain in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only specific implementation methods of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the scope of protection of the embodiments of the present application.

Claims

1. A high-precision micro-deep hole machining method for a stainless steel special-shaped valve body, characterized in that: include: Use a CNC machine tool to process a positioning hole of the first depth at a specified position of the stainless steel special-shaped valve body; Manually drilling a machining hole of a second depth at the positioning hole; The sum of the first depth and the second depth is equal to the depth of the micro deep hole.

2. The high-precision micro-deep hole machining method for a stainless steel special-shaped valve body according to claim 1 is characterized in that: The high-precision micro-deep hole processing method for a stainless steel special-shaped valve body further includes: After the other dimensions of the stainless steel special-shaped valve body are processed, the positioning hole is processed using the CNC machine tool.

3. The high-precision micro-deep hole machining method for a stainless steel special-shaped valve body according to claim 2 is characterized in that: The size of the positioning hole is configured to be φ1.2 mm.

4. The high-precision micro-deep hole machining method for a stainless steel special-shaped valve body according to claim 3 is characterized in that: After the other dimensions of the stainless steel special-shaped valve body are processed, the positioning hole is processed using the same CNC machine tool without changing the clamping position of the stainless steel special-shaped valve body.

5. The high-precision micro-deep hole machining method for a stainless steel special-shaped valve body according to claim 4 is characterized in that: After the processing of other dimensions of the stainless steel special-shaped valve body is completed, the drill bit of the CNC machine tool is replaced.

6. The high-precision micro-deep hole machining method for a stainless steel special-shaped valve body according to claim 3, characterized in that: The positioning hole meets the shape and position tolerance requirements of the high-precision micro deep hole.

7. The high-precision micro-deep hole machining method for a stainless steel special-shaped valve body according to claim 3 is characterized in that: The manually drilling a machining hole of a second depth at the positioning hole comprises: Aligning the positioning hole; The processing hole is manually drilled at the position of the positioning hole using a manual drilling tool.

8. The high-precision micro-deep hole machining method for a stainless steel special-shaped valve body according to claim 7, characterized in that: During the manual drilling of the processed hole, the wear of the drill bit of the manual drilling tool is judged according to the magnitude of the cutting force to control the feed rate of the drill bit.

9. The high-precision micro-deep hole machining method for a stainless steel special-shaped valve body according to any one of claims 1 to 8, characterized in that: The drill bit is configured as a common high-speed steel drill bit.

10. The high-precision micro-deep hole machining method for a stainless steel special-shaped valve body according to any one of claims 1 to 8, characterized in that: The depth of the positioning hole is 1 / 8-1 / 7 of the depth of the micro deep hole.

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