Special-shaped shell high-precision inner hole surface repairing and grinding method

Abstract

The embodiment of the invention provides a method for repairing and grinding the surface of a high-precision inner hole of a special-shaped shell. The method comprises the steps that firstly, the surface of the high-precision inner hole of the special-shaped shell is roughly machined through a machining center; and then the rough-machined surface of the high-precision inner hole is subjected to finish machining manually, so that the grinding and repairing quality of the high-precision inner hole is guaranteed, and the surface of the high-precision inner hole meets the roughness requirement.

Description

Technical Field

[0001] The present application relates to the field of mechanical processing technology, and in particular to a method for high-precision grinding of the inner hole surface of a special-shaped shell. Background Art

[0002] Figure 1 This is the first schematic diagram of a special-shaped shell of a certain device. Figure 2 This is the second schematic diagram of a special-shaped shell of a certain device. Figure 1 and Figure 2 As shown, the special-shaped shell has a high-precision inner hole. The surface accuracy of the high-precision inner hole is high, and the surface roughness of the hole wall is required to reach Ra0.1um. In addition, the hole has a high geometric tolerance requirement relative to the reference, specifically up to 0.005mm.

[0003] When machining the high-precision inner hole of a special-shaped shell, conventional grinding and honing techniques cannot meet the above technical requirements.

[0004] Therefore, a method for surface grinding the high-precision inner hole of a special-shaped shell is now needed to process the high-precision inner hole of the special-shaped shell. Summary of the Invention

[0005] The embodiment of the present application provides a method for surface grinding of a high-precision inner hole of a special-shaped shell, which is used to process the high-precision inner hole of the special-shaped shell.

[0006] The present application provides a method for high-precision surface grinding of an inner hole of a special-shaped shell, comprising:

[0007] Use the machining center to perform rough machining on the surface of the high-precision inner hole of the special-shaped shell;

[0008] The surface of the high-precision inner hole after rough machining is fine-machined manually.

[0009] In a feasible implementation, the rough machining of the surface of the high-precision inner hole of the special-shaped shell by using a machining center includes: grinding the surface of the high-precision inner hole by using the machining center.

[0010] In a feasible implementation, the rough machining of the surface of the high-precision inner hole of the special-shaped shell by using a machining center includes: honing the surface of the high-precision inner hole by using the machining center.

[0011] In a feasible implementation, the surface roughness value of the high-precision inner hole after rough machining is in the range of Ra0.8um-1.6um.

[0012] In a feasible implementation, the manual finishing of the surface of the high-precision inner hole after rough machining includes:

[0013] The surface of the high-precision inner hole is manually subjected to rough grinding and fine polishing in sequence.

[0014] In a feasible implementation, the rough grinding process includes:

[0015] The surface of the high-precision inner hole is roughly ground manually using a bench drill, a grinding rod and a first grinding paste.

[0016] In a feasible implementation, the diameter of the grinding rod is smaller than the diameter of the high-precision inner hole.

[0017] In a feasible implementation, a flexible pressure inner hole polishing method is used to perform fine polishing on the surface of the high-precision inner hole.

[0018] In a feasible implementation, a flexible pressure inner hole polishing method is used to perform fine polishing on the surface of the high-precision inner hole, including:

[0019] Manually performing the fine polishing treatment on the surface of the high-precision inner hole after the rough grinding treatment by using a wool wheel and a second grinding paste with the aid of a bench drill;

[0020] The diameter of the wool wheel is larger than the diameter of the high-precision inner hole.

[0021] In a feasible implementation, the surface of the high-precision inner hole is manually and intermittently subjected to the precision polishing process.

[0022] An embodiment of the present application provides a method for grinding the surface of a high-precision inner hole of a special-shaped shell. First, a machining center is used to rough-machine the surface of the high-precision inner hole of the special-shaped shell; then, the surface of the high-precision inner hole after rough machining is manually fine-machined, thereby ensuring the grinding quality of the high-precision inner hole and making its surface meet the roughness requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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.

[0024] In the attached figure:

[0025] Figure 1 It is the first schematic diagram of a special-shaped shell of a certain device;

[0026] Figure 2 The second schematic diagram of the special-shaped shell of a certain device.

[0027] Figure 3 This is a flow chart of a method for high-precision inner hole surface grinding of a special-shaped shell provided in one embodiment of the present application.

[0028] Description of reference numerals:

[0029] 100-special-shaped shell; 200-high-precision inner hole. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Figure 1 This is the first schematic diagram of a special-shaped shell of a certain device. Figure 2 This is the second schematic diagram of a special-shaped shell of a certain device. Figure 1 and Figure 2As shown, the special-shaped housing 100 has a high-precision inner hole 200. The surface accuracy of the high-precision inner hole 200 is high, and the surface roughness of the hole wall is required to reach Ra0.1um. In addition, the hole has a high geometric tolerance requirement relative to the reference, specifically up to 0.005mm.

[0035] The surface roughness that can be achieved by general grinding is Ra0.8um, while the surface roughness that can be achieved by honing is Ra0.4um. When machining the high-precision inner hole of this special-shaped shell, conventional grinding and honing techniques cannot meet the above technical requirements.

[0036] Therefore, a method for surface grinding the high-precision inner hole of a special-shaped shell is now needed to process the high-precision inner hole of the special-shaped shell.

[0037] In order to solve the above problems, an embodiment of the present application provides a method for high-precision inner hole surface grinding of a special-shaped shell. The following is a detailed description of the solution provided in the embodiment of the present application with reference to the accompanying drawings in the specification.

[0038] Figure 3 This is a flow chart of a method for high-precision inner hole surface grinding of a special-shaped shell provided in one embodiment of the present application.

[0039] Reference Figure 3 As shown, the embodiment of the present application provides a method for high-precision inner hole surface grinding of a special-shaped shell, comprising:

[0040] S100: Rough machining is performed on the surface of the high-precision inner hole of the special-shaped shell by using a machining center.

[0041] In some examples, rough machining is performed on the surface of the high-precision inner hole of the special-shaped shell by using a machining center, including grinding the surface of the high-precision inner hole of the special-shaped shell by using a machining center.

[0042] In some other examples, a machining center is used to perform rough machining on the surface of the high-precision inner hole of the special-shaped shell, including honing the surface of the high-precision inner hole using the machining center.

[0043] The surface roughness value of the high-precision inner hole after rough machining ranges from Ra0.8um to 1.6um.

[0044] S200: manually finishing the surface of the high-precision inner hole after rough machining.

[0045] Specifically, workers manually perform fine finishing on the surface of the rough-machined high-precision inner hole, including manual rough grinding and fine polishing. The rough grinding process involves manually grinding the surface of the high-precision inner hole using a grinding rod and a first abrasive paste using a bench drill to remove deep machining marks. For example, the first abrasive paste has a larger particle size, and the drill operates at a lower rotational speed.

[0046] Exemplarily, the diameter of the grinding rod is smaller than the diameter of the high-precision inner hole, so that the first grinding paste can be distributed on the grinding surface.

[0047] The rough grinding process involves fine polishing the surface of the high-precision inner hole using a flexible pressure inner hole polishing method. Specifically, this process involves manually fine polishing the surface of the high-precision inner hole after the rough grinding process using a wool wheel and a second abrasive paste using a bench drill. Exemplarily, the diameter of the wool wheel is larger than the diameter of the high-precision inner hole, the second abrasive paste is a finer-grained abrasive paste, and the bench drill is operated at a higher rotational speed during the fine polishing process.

[0048] It's understandable that by using a flexible wool wheel slightly larger than the diameter of the high-precision inner hole being machined as a lapping tool, combined with a finer-grained second abrasive paste, during fine-polishing of the high-precision inner hole, the second abrasive paste is squeezed into the inner wall of the high-precision inner hole being machined. This creates a certain pressure between the wool wheel and the inner wall of the high-precision inner hole, creating a natural feed force, eliminating the need for manual feed motion. This method reduces the surface roughness of the high-precision inner hole while also ensuring that the shape and position accuracy of the fine-polishing process is no longer affected by manual effort, relying solely on the original shape and position accuracy, thereby achieving a high-precision inner hole that meets technical requirements.

[0049] Furthermore, the fine polishing process for high-precision inner bores should be performed intermittently to avoid excessive heating of the workpiece due to the high friction between the wool wheel and the high-precision inner bore surface. If a single fine polishing process fails to achieve the required surface roughness, wait until the temperature of the special-shaped shell drops before continuing the fine polishing process until the surface roughness reaches the required level. If, after multiple fine polishing processes, a localized surface still does not meet the required level, use a finer-grained abrasive paste for local finishing and polishing until the surface roughness reaches the required level.

[0050] Compared with traditional grinding or honing, the high-precision inner hole surface grinding method for special-shaped shells provided in the embodiment of the present application can achieve the high-precision inner hole surface roughness requirement of Ra0.1um at a lower cost, with better economy; and also has higher grinding efficiency.

[0051] 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.

[0052] 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 method for high-precision inner hole surface grinding of a special-shaped shell, characterized in that: include: Use the machining center to perform rough machining on the surface of the high-precision inner hole of the special-shaped shell; The surface of the high-precision inner hole after rough machining is fine-machined manually.

2. The high-precision inner hole surface grinding method of a special-shaped shell according to claim 1 is characterized in that: The rough machining of the surface of the high-precision inner hole of the special-shaped shell by using a machining center includes: performing a grinding process on the surface of the high-precision inner hole by using the machining center.

3. The high-precision inner hole surface grinding method of a special-shaped shell according to claim 1 is characterized in that: The rough machining of the surface of the high-precision inner hole of the special-shaped shell by using a machining center includes: honing the surface of the high-precision inner hole by using the machining center.

4. The high-precision inner hole surface grinding method of a special-shaped shell according to claim 1 is characterized in that: The surface roughness value of the high-precision inner hole after rough machining is in the range of Ra0.8um-1.6um.

5. The high-precision inner hole surface grinding method of a special-shaped shell according to claim 1 is characterized in that: The manual finishing of the surface of the high-precision inner hole after rough machining comprises: The surface of the high-precision inner hole is manually subjected to rough grinding and fine polishing in sequence.

6. The high-precision inner hole surface grinding method of a special-shaped shell according to claim 5, characterized in that: The rough grinding process includes: The surface of the high-precision inner hole is roughly ground manually using a bench drill, a grinding rod and a first grinding paste.

7. The high-precision inner hole surface grinding method of a special-shaped shell according to claim 6, characterized in that: The diameter of the grinding rod is smaller than the diameter of the high-precision inner hole.

8. The method for high-precision inner hole surface grinding of a special-shaped shell according to claim 6, characterized in that: The surface of the high-precision inner hole is finely polished by adopting a flexible pressure inner hole polishing method.

9. The method for high-precision inner hole surface grinding of a special-shaped shell according to claim 8, characterized in that: The surface of the high-precision inner hole is finely polished using a flexible pressure inner hole polishing method, including: Manually performing the fine polishing treatment on the surface of the high-precision inner hole after the rough grinding treatment by using a wool wheel and a second grinding paste with the aid of a bench drill; The diameter of the wool wheel is larger than the diameter of the high-precision inner hole.

10. The method for high-precision inner hole surface grinding of a special-shaped shell according to claim 8, characterized in that: The surface of the high-precision inner hole is manually and intermittently subjected to the precision polishing treatment.

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