CN-116511846-B - Forming process of special-shaped inner ring based on rough cutting treatment

CN116511846BCN 116511846 BCN116511846 BCN 116511846BCN-116511846-B

Abstract

The invention relates to a forming process of a special-shaped inner ring based on rough cutting treatment, which comprises the following steps of 1) rough cutting treatment and 2) cutting processing. The invention realizes the clamping and cutting of the special-shaped inner ring by taking the annular groove as a positioning reference based on rough opening, effectively avoids deformation caused by stress concentration due to the fact that one of the two convex edges is too thin, improves the yield of products, and simultaneously avoids the increase of allowance due to the fact that the annular groove is too wide under the processing requirements of corresponding thickness and width, thereby improving the parallelism, flatness and roundness precision of the products.

Inventors

LIU SHOULIN

Assignees

苏州典艺精密机械有限公司

Dates

Publication Date: 20260508
Application Date: 20210531

Claims (4)

1. The forming process of the special-shaped inner ring based on the rough cutting treatment is characterized by comprising the following steps of: 1) Coarse processing Firstly, cutting and processing the inner wall of the special-shaped inner ring or directly taking one end part of the outer diameter of the special-shaped inner ring as a positioning reference on the circumferential surface of the special-shaped inner ring to form an annular groove-shaped opening thickness, wherein the depth of the annular groove is smaller than the allowance of the surface cutting of the special-shaped inner ring, the depth of the annular groove is 2+/-0.2 mm, the width w1 of the annular groove, the thicknesses of two convex edges formed by the annular groove are H1 and H2 respectively, wherein w1 is smaller than H1+h2, and the thickness H of the special-shaped inner ring which is not subjected to opening thickness treatment is smaller than 1; 2) Cutting and machining Firstly placing the roughened special-shaped inner ring into a solution furnace at 1100-1200 ℃ for solution treatment, then carrying out rough machining, and then carrying out finish machining, wherein the rough machining takes an annular groove as a positioning reference to finish the cutting of the inner wall and the outer wall of the special-shaped inner ring, the finish machining takes two ends of the annular groove as the positioning reference, the end faces of the special-shaped inner ring are attached to an abutting mode to finish the finishing of the inner wall and the corresponding outer wall of the special-shaped inner ring, or the two ends of the annular groove are taken as the positioning reference to attach to the abutting mode to finish the finishing of the inner wall of the special-shaped inner ring, and then the inner wall of the special-shaped inner ring is taken as the positioning reference to finish the finishing of the outer wall of the special-shaped inner ring.
2. The profiled inner ring forming process based on the rough cutting treatment according to claim 1, wherein the profiled inner ring after the rough cutting is subjected to solution treatment at 1160±5 ℃.
3. The profiled inner ring forming process based on the rough cutting treatment according to claim 1 is characterized in that the rough cutting process comprises a) taking an annular groove as a positioning reference, abutting the profiled inner ring against a positioning platform from the rear end face backwards by the groove wall on one side of the annular groove, processing the front part of the profiled inner ring and the front part of the annular groove at the moment, b) turning the profiled inner ring 180 degrees after the front end part of the profiled inner ring is processed, abutting the end face of the profiled inner ring which is processed automatically on the positioning platform backwards by the groove wall on the other side of the annular groove, and processing the positioned profiled inner ring and the front part of the annular groove at the moment.
4. The profiled inner ring forming process based on the rough cutting process according to claim 3, wherein the cutting process is performed by using a CNC lathe.

Description

Forming process of special-shaped inner ring based on rough cutting treatment The application relates to a divisional application of a forming process for precisely machining a special-shaped inner ring, wherein the application date is 2021, 5 and 31, the application number is 202110601973.0. Technical Field The invention belongs to the technical field of precision machining, and particularly relates to a forming process of a special-shaped inner ring based on rough cutting treatment. Background In the field of precision machining, the final quality thereof depends mainly on the machining process, such as the machining of an inner ring of an air film, which has the following defects in the machining process: 1) The product is thin-walled and easy to deform; 2) The clamping position is not arranged, and the positioning is not easy; 3) The product can be further deformed after being placed under the influence of stress concentration. Therefore, aiming at the processing of the product, how to realize deformation prevention, good clamping and deformation caused by stress concentration can not be realized, and the processing method has become a technical problem in the field. Disclosure of Invention The invention aims to solve the technical problem of overcoming the defects of the prior art and providing a brand-new special-shaped inner ring forming process based on rough cutting treatment. In order to solve the technical problems, the invention adopts the following technical scheme: a special-shaped inner ring forming process based on rough cutting treatment comprises the following steps: 1) Coarse processing Firstly, cutting and processing the inner wall of the special-shaped inner ring or directly taking one end part of the outer diameter of the special-shaped inner ring as a positioning reference on the circumferential surface of the special-shaped inner ring to form an annular groove-shaped opening thickness, wherein the depth of the annular groove is smaller than the cutting allowance of the surface of the special-shaped inner ring, the width w1 of the annular groove, the thicknesses of two convex edges formed by the annular groove are H1 and H2 respectively, wherein w1 is smaller than H1+h2, and I H1-H2I is smaller than or equal to 1; 2) Cutting and machining And (3) carrying out rough machining on the rough-opened special-shaped inner ring, and then carrying out finish machining, wherein the rough machining and the finish machining are carried out by taking the annular groove as a positioning reference, so that the cutting of the inner wall and the outer wall of the special-shaped inner ring is completed. Preferably, in step 1), the depth of the annular groove is 2±0.2mm. The arrangement is convenient for processing the surface of the special-shaped inner ring. According to a specific and preferred aspect of the invention, in step 1), w1/H <1/2. The arrangement avoids the over-wide annular groove, increases the allowance and improves the processing precision. According to a further specific implementation and preferred aspect of the present invention, after the step 1) is completed to finish the roughening, the roughened profiled inner ring is first placed into a solution furnace for solution treatment. Stress on the special-shaped inner ring can be released, stress concentration of the special-shaped inner ring is avoided, deformation is further avoided, and the yield of products is improved. Preferably, the roughened special-shaped inner ring is subjected to solution treatment at 1100-1200 ℃. In some specific embodiments, the roughened special-shaped inner ring is subjected to solution treatment at 1160+/-5 ℃ so as to achieve the best effect. According to still another specific implementation and preferred aspect of the invention, rough machining comprises a) taking an annular groove as a positioning reference, abutting the special-shaped inner ring against a positioning platform from the rear end face backwards by the groove wall on one side of the annular groove, machining the front part of the special-shaped inner ring and the front part of the annular groove at the moment, b) turning over the special-shaped inner ring 180 degrees after the front end part of the special-shaped inner ring is machined, abutting the end face of the special-shaped inner ring which is machined automatically on the positioning platform backwards by the groove wall on the other side of the annular groove, and machining the special-shaped inner ring and the front part of the annular groove after positioning. Preferably, the cutting process is performed using a CNC lathe. In addition, the finish machining uses two ends of the annular groove as positioning references, and the end faces of the special-shaped inner ring are attached to the abutting mode, so that the finish machining of the inner wall and the corresponding outer wall of the special-shaped inner ring is realized. Or the finish machining uses two ends of the annul