Groove machining method

Abstract

The embodiment of the application discloses a ring groove machining method, comprising the following steps: rough machining an original shell to obtain a shell to be machined; placing the shell to be machined on a lathe, and installing an expander at a stopper position; taking an end face of the shell to be machined as a reference surface, and machining a stepped groove with a first preset size along an axial direction; taking a kick surface of the stepped groove as a reference surface, and machining a ring groove with a second preset size on a plane of the stepped groove along the axial direction; taking the kick surface of the stepped groove as a reference surface, finding a machining reference point at a preset distance therefrom, and performing cutting according to a line connecting an end point of a side of the ring groove close to the end face and the machining reference point; wherein the first preset size, the second preset size and the preset distance are determined according to a required width of the ring groove and an angle of an edge of the ring groove; and rounding a corner between the end face and a plane of the step until a preset diameter is met, to obtain a machined shell. The machining efficiency and product qualification rate are improved.

Description

Technical Field

[0001] The present invention relates to the field of mechanical processing, and in particular to a ring groove processing method. Background Art

[0002] Among the products manufactured through machining, there are a large number of shell parts, and the connection between segments mainly relies on the ring groove at the end of the part as the interface. The ring groove interface size is the most important dimension of the shell, so its precision is required to be high.

[0003] According to the current processing technology, the dimensional accuracy of the product can only be guaranteed by equipment. After machining, the lathe is used to determine whether it is qualified through three coordinates. If it is unqualified, it is almost impossible to go on the lathe to correct the part to meet the requirements of the drawing. The qualified rate of the product is very low and unstable.

[0004] There is currently no effective solution to the problem of poor quality and low pass rate of ring grooves of parts after processing in the prior art. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides a ring groove processing method, which ensures that the processing benchmarks of various dimensions are consistent by forming the shell on a lathe at one time during processing, reduces processing errors, and solves the problems of poor quality and low pass rate of ring grooves of parts after processing in the prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides a ring groove processing method, comprising: rough-machining the original shell to obtain a shell to be processed; placing the shell to be processed on a lathe, and installing an expansion ring at the stop position; using the end face of the shell to be processed as a reference plane, axially processing a step groove of a first preset size; using the riser surface of the step groove as a reference plane, axially processing a ring groove of a second preset size on the plane of the step groove; using the riser surface of the step groove as a reference plane, finding a processing reference point at a preset distance from it, and cutting according to the line connecting the end point of the ring groove close to the end face and the processing reference point; wherein, the first preset size, the second preset size and the preset distance are all determined according to the required width of the ring groove and the angle of the ring groove edge; the corners of the end face and the plane of the step are chamfered until they meet the preset diameter to obtain the processed shell.

[0007] Further optionally, after the corners of the end face and the step are rounded to obtain the processed shell, the process includes: using a go gauge and a no-go gauge to perform dimensional inspection on the processed shell respectively; if the processed shell passes all inspections, the processed shell is considered qualified; if the processed shell fails one of the inspections, the processed shell is repaired until it passes all inspections.

[0008] Further optionally, the through gauge includes an integrally formed first column portion, a first platform portion and a first bevel portion; the first column portion and the first bevel portion are respectively arranged on both sides of the bearing surface of the first platform portion; when the through gauge detects a qualified shell, the inner surface of the first column portion fits with the end face, the inner surface of the first bevel portion fits with the inner surface of the annular groove, and the bearing surface of the first platform portion fits with the plane of the step groove or a first gap is left; wherein, the size of the first gap is not greater than 0.05 mm.

[0009] Further optionally, the stop gauge includes an integrally formed second column portion, a second platform portion and a second bevel portion; the second column portion and the second bevel portion are respectively arranged on both sides of the bearing surface of the second platform portion; when the stop gauge detects a qualified shell, the inner surface of the second column portion fits with the end face, the inner surface of the second bevel portion fits with the inner surface of the annular groove, and a second gap is left between the bearing surface of the first platform portion and the plane of the step groove; wherein the size of the second gap is not less than 0.05 mm.

[0010] Further optionally, the preset diameter is 0.5 mm.

[0011] Further optionally, the first preset size includes a first diameter and a first length; the first diameter is 526.4 mm, and the first length is 15.13 mm.

[0012] Further optionally, the second preset size includes a second diameter and a second length; the second diameter is 518 mm, and the second length is 3.995 mm.

[0013] Further optionally, the preset distance is 5.14 mm.

[0014] The above technical solution has the following beneficial effects: the processing method is one-time forming on a lathe, with consistent datum and low processing error, avoiding the cumulative error caused by multiple processing calibrations, so that the product meets the drawing requirements; on the lathe, the key dimensions on the shell ring groove that are difficult to measure are ensured by using special go and no-go gauges to ensure the correctness of the machined dimensions, thereby ensuring the correctness of the shell dimensions and greatly improving the product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a structural schematic diagram of a shell in the prior art;

[0017] Figure 2 It is a structural diagram of the ring groove position in the prior art;

[0018] Figure 3 is a flow chart of a ring groove machining method provided by an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the process flow of the ring groove machining process provided by an embodiment of the present invention;

[0020] Figure 5 Schematic diagram of the structure of a general gauge provided by an embodiment of the present invention;

[0021] Figure 6 It is a structural schematic diagram of the general gauge provided by the embodiment of the present invention when in use.

[0022] Reference numerals: 1-step groove; 2-chamfer; 3-ring groove; 4-machining reference point. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Figure 1 It is a structural diagram of a shell in the prior art; Figure 1 As shown, a certain model of shell has an annular groove at the end, which is the interface between segments, so its precision requirement is relatively high.

[0025] Figure 2 It is a structural diagram of the ring groove position I in the prior art, such as Figure 2 As shown, the plane width of the step groove is 10-+00..0031, the internal angle of the ring groove 3 is 15°±5′, and there is a chamfer 2 of R0.5 at the edge. The position of the ring groove is not measurable during processing. In addition, the tolerance range is small, and the qualified rate of the parts can only be guaranteed by the accuracy of the machine tool. After the shell is processed, the product is seriously out of tolerance and does not meet the requirements of the drawing. When the shell is put back on the lathe for repair, the meter cannot be aligned, resulting in scrapping of the part.

[0026] In order to solve the above problems, an embodiment of the present invention provides a ring groove processing method. Figure 3 Flowchart of the ring groove processing method provided by the embodiment of the present invention is as follows: Figure 3 As shown, the method includes:

[0027] S1, rough-processing the original shell to obtain the shell to be processed;

[0028] The original shell is rough-machined to obtain a preliminarily formed shell to be processed, and a certain processing allowance should be left for the shell to be processed.

[0029] S2. Place the shell to be processed on a lathe and install an expansion ring at the stop position;

[0030] Place the finished rough-machined shell on the lathe, install expansion rings at the stop position to prevent the shell from deforming during processing, support the inner circle at both ends with four claws, and align the shell with a dial.

[0031] S3, using the end surface of the shell to be processed as a reference surface, processing a step groove 1 of a first preset size along the axial direction;

[0032] like Figure 4 As shown, the end face of the shell to be processed ( Figure 4 The A surface in the figure is the reference surface, and the step The dimension 15 takes the median value 15.13 to obtain the step groove 1.

[0033] S4, using the riser surface of the step groove as a reference plane, machining an annular groove of a second preset size along the axial direction on the plane of the step groove;

[0034] The riser of the step groove ( Figure 4 The B surface in the figure is the reference surface, and the ring groove is machined. 3.995 is the reverse calculated value based on the geometric relationship, and the ring groove 3 is obtained.

[0035] S5. Using the riser surface of the step groove as a reference plane, find a machining reference point at a preset distance from the riser surface, and perform cutting along a line connecting the endpoint of the ring groove near the end face and the machining reference point; wherein the first preset size, the second preset size, and the preset distance are all determined based on the desired width of the ring groove and the angle of the ring groove edge;

[0036] The riser of the step groove ( Figure 4 Use the B surface in the figure as the reference plane, find the processing reference point 4 of 5.14, connect 5.14 and 3.995, and indirectly ensure the 15° dimension.

[0037] S6. Chamfer the corners between the end face and the plane of the step until they meet the preset diameter, thereby obtaining a processed shell.

[0038] The edge position is rounded to R0.5 to obtain chamfer 2.

[0039] As an optional implementation, the preset diameter is 0.5 mm.

[0040] As an optional embodiment, the first preset size includes a first diameter and a first length;

[0041] The first diameter is 526.4 mm, and the first length is 15.13 mm.

[0042] As an optional embodiment, the second preset size includes a second diameter and a second length;

[0043] The second diameter is 518 mm, and the second length is 3.995 mm.

[0044] As an optional implementation, the preset distance is 5.14 mm.

[0045] As an optional embodiment, after rounding the corners of the end surface and the step to obtain the processed shell, the method further comprises:

[0046] S7. Using a go gauge and a stop gauge to perform dimensional inspection on the processed housing. If the processed housing passes all inspections, the processed housing is considered qualified.

[0047] S8. If the processed housing fails one of the tests, repair the processed housing until it passes all the tests.

[0048] After the shell ring groove is machined, use the above inspection method to check whether the ring groove size meets the drawing requirements. If there are defects, the shell can be repaired under the same benchmark to ensure the shell's pass rate.

[0049] As an optional implementation, Figure 5 Schematic diagram of the structure of the general rule provided by the embodiment of the present invention, such as Figure 5 As shown, the through gauge includes an integrally formed first column portion 100, a first platform portion 200 and a first oblique body portion 300; the first column portion 100 and the first oblique body portion 300 are respectively arranged on both sides of the bearing surface of the first platform portion 200; when the through gauge detects a qualified shell, the inner surface of the first column portion 100 is in contact with the end face A, the inner surface of the first oblique body portion is in contact with the inner surface of the annular groove, and the bearing surface of the first platform portion is in contact with the plane of the step groove or a first gap is left; wherein, the size of the first gap is not greater than 0.05 mm.

[0050] According to the design of special measuring tools for the ring groove, the measuring tool is a go / no-go gauge, which is mainly used to check The two key dimensions are 15°±5′. The tolerance of the go gauge for dimension 10 is (0.01, 0.015) um, the tolerance of the stop gauge is (-0.035, -0.03) um, and the angle of the go gauge is 15°±3′.

[0051] like Figure 6 As shown, when the through gauge is used, the D and E surfaces of the through gauge fit with the shell, and the F surface should fit with the shell or leave a gap of ≤0.05mm (there will be tool marks).

[0052] As an optional embodiment, the stop gauge includes an integrally formed second column portion, a second platform portion and a second bevel portion; the second column portion and the second bevel portion are respectively arranged on both sides of the bearing surface of the second platform portion; when the stop gauge detects a qualified shell, the inner surface of the second column portion is fitted with the end face, the inner surface of the second bevel portion is fitted with the inner surface of the annular groove, and a second gap is left between the bearing surface of the first platform portion and the plane of the step groove; wherein the size of the second gap is not less than 0.05 mm.

[0053] The shape of the stop gauge is consistent with that of the through gauge, and some dimensions are slightly different. The tolerance of the stop gauge for dimension 10 is (-0.035, -0.03)um, and the angle is also 15°±3′.

[0054] like Figure 6 As shown in the figure, when the stop gauge is used, the D and E surfaces of the stop gauge fit with the shell, and there must be a gap of ≥0.05mm between the F surface and the shell, then the product is judged to be qualified.

[0055] The above technical solution has the following beneficial effects: the processing method is one-time forming on a lathe, with consistent datum and low processing error, avoiding the cumulative error caused by multiple processing calibrations, so that the product meets the drawing requirements; on the lathe, the key dimensions on the shell ring groove that are difficult to measure are ensured by using special go and no-go gauges to ensure the correctness of the machined dimensions, thereby ensuring the correctness of the shell dimensions and greatly improving the product qualification rate.

[0056] The specific implementation methods of the above inventions further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above content is only the specific implementation methods of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A ring groove processing method, characterized in that: include: The original shell is rough-machined to obtain a shell to be machined; The shell to be processed is placed on a lathe, and an expansion ring is installed at the stop position; Using the end surface of the shell to be processed as a reference surface, processing a step groove of a first preset size along the axial direction; Using the riser surface of the step groove as a reference plane, machining an annular groove of a second preset size along the axial direction on the plane of the step groove; Using the riser surface of the step groove as a reference plane, find a processing reference point at a preset distance from the riser surface, and perform cutting along a line connecting the end point of the ring groove close to the end surface and the processing reference point; wherein the first preset size, the second preset size, and the preset distance are all determined based on the required width of the ring groove and the angle of the ring groove edge; The corner between the end face and the plane of the step is rounded until it meets the preset diameter to obtain a processed shell.

2. The ring groove processing method according to claim 1, characterized in that: After rounding the corners of the end surface and the step to obtain the processed shell, the method includes: Using a go gauge and a no-go gauge to perform dimensional inspection on the processed shell, if the processed shell passes all the inspections, the processed shell is considered qualified; If the processed housing fails one of the tests, the processed housing is repaired until it passes all the tests.

3. The ring groove machining method according to claim 2, characterized in that: The through gauge includes an integrally formed first column portion, a first platform portion, and a first italic portion; The first column portion and the first oblique body portion are respectively arranged on both sides of the bearing surface of the first platform portion; When the through gauge detects a qualified shell, the inner surface of the first column portion fits with the end face, the inner surface of the first bevel portion fits with the inner surface of the annular groove, and the bearing surface of the first platform portion fits with the plane of the step groove or a first gap is left; wherein, the size of the first gap is not greater than 0.05 mm.

4. The ring groove machining method according to claim 2, wherein: The stop gauge includes an integrally formed second column portion, a second platform portion, and a second italic portion; The second column portion and the second oblique body portion are respectively arranged on both sides of the bearing surface of the second platform portion; When the stop gauge detects a qualified shell, the inner surface of the second column portion fits with the end face, the inner surface of the second bevel portion fits with the inner surface of the annular groove, and a second gap is left between the bearing surface of the second platform portion and the plane of the step groove; wherein the size of the second gap is not less than 0.05 mm.

5. The ring groove machining method according to claim 1, characterized in that: The preset diameter is 0.5 mm.

6. The ring groove machining method according to claim 1, characterized in that: The first preset size includes a first diameter and a first length; The first diameter is 526.4 mm, and the first length is 15.13 mm.

7. The ring groove machining method according to claim 6, characterized in that: The second preset size includes a second diameter and a second length; The second diameter is 518 mm, and the second length is 3.995 mm.

8. The ring groove machining method according to claim 6, characterized in that: The preset distance is 5.14 mm.

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