Opening thin-wall part machining method

Abstract

The invention relates to the technical field of machining, and discloses an open thin-wall part machining method which comprises the specific steps that firstly, rough machining is conducted, specifically, a workpiece is clamped on a lathed three-jaw chuck, and a blank is machined into a cylindrical shape; step 2, primary aging: carrying out primary aging treatment on the part; thirdly, semi-finish turning is conducted, inner holes and outer circles are turned, annular grooves are turned in the inner holes and the outer circles correspondingly, the inner holes and the outer annular grooves are evenly spaced, each annular groove is spaced into a part, and a plurality of parts can be machined at the same time; 4, groove milling is conducted, specifically, grooves are symmetrically formed in the two side faces of the part subjected to semi-finish turning; 5, aging for the second time; and sixthly, finish turning is conducted. According to the machining method for the open thin-wall part, the inner hole and the outer circle in the semi-finish turning procedure are turned into the ring grooves respectively, only 1 mm of allowance is reserved on the single edge, each inner ring groove and each outer ring groove are one part and are evenly connected at intervals, and the problem that the thin-wall part is difficult to clamp is solved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, in particular to a method for processing an open thin-walled part. Background Art

[0002] Forged aluminum alloy LD2 has low density, high strength, good plasticity, good thermal conductivity, electrical conductivity, corrosion resistance, and good mechanical properties. It is widely used in the manufacture of engines, impellers, aircraft joints, frames and other parts.

[0003] A pressure plate is one of the parts of a turbocharger. It is an open thin-walled part made of forged aluminum LD2. The ratio of thickness to outline size reaches one sixtieth. During processing, aluminum alloy thin-walled parts are subjected to clamping force, cutting force, etc., and the processing process generates a lot of heat, which causes the thin-walled parts to be easily deformed due to heat, thus affecting the size and position accuracy of the parts. Open thin-walled parts have the characteristics of thin wall and openness. Regardless of whether it is cutting processing or wire cutting processing method, there are deformations such as bending, twisting, and bending and twisting after forming. Therefore, it has always been a difficult point in process control in machining. Summary of the invention

[0004] 1. Technical issues to be resolved In view of the shortcomings of the prior art, the present invention provides a method for processing open thin-walled parts, which is capable of turning the inner hole and outer circle of the semi-finishing turning process into ring grooves respectively, leaving only a 1mm margin on one side, and each inner ring groove and outer ring groove are a part, which are evenly connected at intervals, thus solving the problem of difficult clamping of thin-walled parts.

[0005] (II) Technical solution To achieve the above-mentioned purpose, the present invention provides the following technical solution: a method for processing an open thin-walled part, the specific steps are: Step 1: Rough machining: clamp the workpiece on a three-jaw chuck mounted on a lathe and process the blank into a cylindrical shape; Step 2: First aging: perform the first aging treatment on the parts; Step 3: semi-finishing turning, turning the inner hole and outer circle, and turning the inner hole and outer circle into annular grooves respectively. The inner hole and outer circle annular grooves are evenly spaced, and each annular groove is spaced as a part, so that several parts can be processed at the same time; Step 4: Milling grooves, symmetrically groove the two sides of the semi-finished parts; Step 5: Second aging: the entire part is now connected only by the ring groove, and the part is subjected to a second aging treatment; Step 6: Finish turning, switch the finishing tool and process the part to the required size; Step 7: Integrate the parts. Complete the integration of the entire parts through CNC milling and bench work.

[0006] Preferably, the first aging process mainly releases the residual stress of the blank.

[0007] Preferably, the second aging process mainly releases residual stress during processing.

[0008] Preferably, the plurality of parts are clamped using the same blank.

[0009] Preferably, during finish turning, the two end planes are turned first, then the outer circle is machined to size, and finally the inner hole is turned. After the last turning, the part will fall off the blank.

[0010] Preferably, during the rough machining, a 3mm margin is left on one side of the part.

[0011] Preferably, during the semi-finishing turning process, the allowance on one side of the part is 1 mm.

[0012] (III) Beneficial effects Compared with the prior art, the present invention provides a method for processing open thin-walled parts, which has the following beneficial effects: 1. This method for processing open thin-walled parts, by turning the inner hole and outer circle of the semi-finishing turning process into ring grooves, leaving only a 1mm margin on one side, each inner ring groove and outer ring groove is a part, evenly connected at intervals, solving the problem of difficult clamping of thin-walled parts.

[0013] 2. This method for processing open thin-walled parts, through the milling process after semi-finishing turning, is to symmetrically groove the two sides of the semi-finished parts to further release the internal stress of the open structure. Compared with conventional methods (or milling or), this method can release stress to a great extent, which is economical and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the parts structure; Figure 2 It is a schematic diagram of the rough machining structure of the parts; Figure 3 This is the semi-finished section view of the part; Figure 4 This is a schematic diagram of the semi-finishing structure of the part; Figure 5 Schematic diagram of the groove structure on the side of the part. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0016] See also Figure 1-4 , a method for processing open thin-walled parts, 1. The specific steps are: Step 1: Rough machining: clamp the workpiece on the three-jaw chuck mounted on the lathe, and machine the blank into a cylindrical shape. During rough machining, leave a 3mm margin on one side of the part; Step 2: First aging: The first aging treatment is performed on the parts. The first aging treatment is mainly to release the residual stress of the blank. Step 3: Semi-finishing turning: turning the inner hole and outer circle, and turning the annular grooves of the inner hole and outer circle respectively. The inner hole and outer circle annular grooves are evenly spaced, and each annular groove is spaced as a part. Several parts can be processed at the same time. During semi-finishing turning, the single-side allowance of the part is 1mm. Multiple parts are clamped using the same blank body, which solves the problem of difficult clamping and large deformation of a single part. Step 4: Milling grooves, symmetrically groove the two sides of the semi-finished parts; Step 5: Second aging. The entire part is now connected only by the ring groove. The second aging treatment is performed on the part. The second aging treatment is mainly to release the residual stress during the processing. Step 6: Finish turning. Switch the finishing tool to process the part to the correct size. First, turn the two end planes, then process the outer circle to the size, and finally turn the inner hole. After the last turning, the part will fall off the blank. At this time, the part shape processing is completed. Step 7: Integrate the parts. Complete the integration of the entire parts through CNC milling and bench work.

[0017] It should be noted that the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0018] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for processing an open thin-walled part, the specific steps of which are: Step 1: Rough machining: clamp the workpiece on a three-jaw chuck mounted on a lathe and process the blank into a cylindrical shape; Step 2: First aging: perform the first aging treatment on the parts; Step 3: semi-finishing turning, turning the inner hole and outer circle, and turning the inner hole and outer circle into annular grooves respectively. The inner hole and outer circle annular grooves are evenly spaced, and each annular groove is spaced as a part, so that several parts can be processed at the same time; Step 4: Milling grooves, symmetrically groove the two sides of the semi-finished parts; Step 5: Second aging: the entire part is now connected only by the ring groove, and the part is subjected to a second aging treatment; Step 6: Finish turning, switch the finishing tool and process the part to the required size; Step 7: Integrate the parts. Complete the integration of the entire parts through CNC milling and bench work.

2. A method for processing an open thin-walled part according to claim 1, characterized in that: The first aging process mainly releases the residual stress of the blank.

3. The method for processing an open thin-walled part according to claim 1, characterized in that: The second aging process mainly releases the residual stress in the processing.

4. The method for processing an open thin-walled part according to claim 1, characterized in that: A plurality of the parts are clamped by using the same blank body.

5. The method for processing an open thin-walled part according to claim 1, characterized in that: During finish turning, the two end planes are turned first, then the outer circle is machined to size, and finally the inner hole is turned. After the last turning, the part will fall off the blank.

6. The method for processing an open thin-walled part according to claim 1, characterized in that: During the rough machining, a 3mm margin is left on one side of the part.

7. The method for processing an open thin-walled part according to claim 1, characterized in that: During the semi-finishing turning process, the allowance on one side of the part is 1mm.

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