CN110814653A - Processing technology of snap ring for asynchronous motor - Google Patents
Processing technology of snap ring for asynchronous motor Download PDFInfo
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- CN110814653A CN110814653A CN201911115902.9A CN201911115902A CN110814653A CN 110814653 A CN110814653 A CN 110814653A CN 201911115902 A CN201911115902 A CN 201911115902A CN 110814653 A CN110814653 A CN 110814653A
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- asynchronous motor
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- snap ring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
The invention relates to a processing technology of a snap ring for an asynchronous motor, wherein a semi-ring is made of stainless steel, the diameter of an inner hole is phi 341.6D8(+0.21/+0.299), the wall thickness is 7mm, the width dimension is 40, the semi-ring and the snap ring are matched and processed, and the gap is 0.03-0.09 mm. When the method of dividing half into halves after finishing the whole circle by finish machining is adopted, the size of the half-ring after the half-dividing is changed due to the change of stress, so that the use requirement cannot be met. The method can ensure that the dimension after final processing can not be changed due to stress change, and ensure the dimensional tolerance, the form and position tolerance precision and the later assembly precision.
Description
The technical field is as follows:
the invention relates to a processing technology of a snap ring for an asynchronous motor.
Background art:
with the development of motor technology, more researches are made on the solid rotor of the motor, and the solid rotor asynchronous motor has the advantages of simple structure, soft mechanical property, low manufacturing cost and the like. After the machining of the solid rotor core slot is completed, the copper bar is assembled, a plurality of positions in the middle of the copper bar need to be fixed by clamping rings, and the clamping rings are of a pair of semi-ring centering welding structures. Because the rotor is a rotating part and has higher rotating speed, the processing requirement on the clamping ring is higher, and meanwhile, the assembly precision requirement on the clamping ring and the iron core clamping groove is also higher.
The existing processing method of the half-and-half ring part is to finish machine the whole size of the inner circle, the outer circle and the end face of the snap ring for the asynchronous motor to the final size of a drawing in a full circle state, perform linear cutting and halving after finishing finish machining, and mill the size of a half-divided joint surface slope to the size of the drawing by a milling machine. Because the diameter of the snap ring for the asynchronous motor is larger and the wall thickness is thinner, the process method has the following obvious defects by practice: because the finish machining of whole circle is accomplished the back, and the measurement size accords with the drawing requirement, after dividing half with the line cutting, during milling the groove, discovery semi-ring member opening part size grow, and the dimensional change of two semi-snap rings is inconsistent, takes place "dislocation" phenomenon when leading to two semi-rings centering, the analysis reason is because: after the finish machining of the whole circle is completed, the internal stress of the material is kept balanced, the measuring size meets the requirement of a drawing, after the whole circle line cutting of the snap ring is divided into halves, the internal stress changes and is not kept balanced any more, the internal stress is released again, the size of the divided half end part and the form and position tolerance change after the finish machining, and therefore the final size does not meet the requirement of the drawing, and the use of the part is influenced. Based on the above situation, the use requirement of the snap ring product for the asynchronous motor can be ensured only by appointing a reasonable processing technology again.
The invention content is as follows:
the invention provides a processing method of a snap ring for an asynchronous motor, which adopts the technical methods of dividing rough machining into halves, performing rough machining after spot welding, performing rough milling on a groove after dividing, and performing final finish machining after spot welding, thereby ensuring that the precision of the final dimensional tolerance and the geometric tolerance meets the use requirement.
The technical scheme of the invention is as follows: processing technique of snap ring for asynchronous motor
a) After alignment, dividing the whole clamping ring for the asynchronous motor into two parts by linear cutting;
b) milling two half joint surfaces of a half ring part of a snap ring for the asynchronous motor, wherein the roughness is at least Ra3.2;
c) aligning two halves of the snap ring for the asynchronous motor processed in the step b), adopting a chuck claw to assist in clamping a workpiece, wherein the gap of the split half surface is not more than 0.02mm, spot-welding the two halves of the snap ring for the asynchronous motor together, spot-welding one point on each of two end surfaces of the plane joint of the snap ring for the asynchronous motor, and spot-welding two points on each of the inner circle joint and the outer circle joint of the snap ring for the asynchronous motor;
d) roughly turning a clamping ring for the asynchronous motor, wherein the clamping ring is welded together in a spot mode, machining the inner circle, the outer circle and the upper end face of the clamping ring for the asynchronous motor, reserving machining allowance diameters of the inner circle and the outer circle of the clamping ring for the asynchronous motor respectively of 4mm, machining the end face of 1mm, and not machining the other end face;
e) grinding a welding spot at the other end of the clamping ring for the asynchronous motor by using a grinding tool, and milling two half-joint surfaces and a welding groove, wherein the roughness of the processed surface of the workpiece is at least Ra3.2;
f) aligning two halves of the clamp ring for the asynchronous motor processed in the step e), clamping a workpiece by using a chuck jaw in an auxiliary manner, wherein the gap of the joint surface of the clamp ring for the asynchronous motor is not more than 0.02mm, spot-welding the two halves of the clamp ring for the asynchronous motor together, and spot-welding two points in the groove at the outer circle joint surface of the clamp ring for the asynchronous motor;
g) finely turning the sizes of the inner circle and the outer circle of the clamping ring for the asynchronous motor to the sizes of the drawing, reserving the machined end face for 2mm, adjusting the clamping ring, and aligning to the optimal state, wherein the grinding reserving amount of the machined end face is 0.3-0.5 mm;
h) opening a spot welding point in the excircle groove by using a polishing tool, and milling the excircle groove to the drawing size;
i) and (4) grinding the end face according to the actual machining size.
The invention has the technical effects that:
the invention adopts the technical method of rough machining and forming firstly, halving by linear cutting, rough machining after spot welding, rough milling of a groove after splitting, and finishing final finish machining after spot welding, so that the internal stress is fully released in the machining process, and the precision of the final dimensional tolerance and form and position tolerance is ensured, thereby meeting the design and use requirements of the snap ring for the asynchronous motor, eliminating the defect that the dimensional tolerance and form and position tolerance are changed because the stress is released again after halving in the original machining technical method, ensuring the success rate of product manufacturing, and saving the cost. According to the existing paired semi-ring part processing method, the whole sizes of the inner circle, the outer circle and the end face of the snap ring for the asynchronous motor are finely processed to the final size of a drawing, linear cutting and halving are carried out after the fine processing is finished, and the size of the groove of the halved joint surface is milled to the size of the drawing by a milling machine. After the clamping ring for the asynchronous motor is processed according to the process method, the final size detection of the clamping ring for the asynchronous motor does not meet the use requirement, and under the condition, a new processing process must be found again to meet the use requirement of the clamping ring product for the asynchronous motor.
In view of the above processing techniques, and by referring to 1: 1, repeatedly verifying and further searching to determine a new processing technology, namely adopting a clamping ring full circle for an asynchronous motor to perform rough processing allowance, dividing into halves by linear cutting, centering and spot welding the halved clamping ring, then performing rough processing allowance, roughly milling a groove after dividing, and finally performing finish processing on the halved clamping ring after centering and spot welding. By adopting the processing method, the dimensional and form and position tolerance changes caused by the stress re-release after the whole circle is divided into halves are eliminated. The processing method of the snap ring for the asynchronous motor is summarized to complete the whole processing method to guide production by changing the original processing method. The processing method is verified on the simulation piece with the same material and the same size, and is applied to the extra products to achieve the expected effect of the products.
Description of the drawings:
fig. 1 is a schematic diagram of a first-time asynchronous motor in a spot welding state after a snap ring is divided into halves.
Fig. 2 is a schematic diagram of a spot welding state after the second asynchronous motor is divided into halves by the snap ring.
The specific implementation mode is as follows:
a) after alignment, dividing the whole clamping ring for the asynchronous motor into two parts by linear cutting;
b) milling two half joint surfaces of a half ring part of a snap ring for the asynchronous motor, wherein the roughness is at least Ra3.2;
c) aligning two halves of the snap ring for the asynchronous motor processed in the step b), adopting a chuck claw to assist in clamping a workpiece, wherein the gap of the split half surface is not more than 0.02mm, spot-welding the two halves of the snap ring for the asynchronous motor together, spot-welding one point on each of two end surfaces of the plane joint of the snap ring for the asynchronous motor, and spot-welding two points on each of the inner circle joint and the outer circle joint of the snap ring for the asynchronous motor;
d) roughly turning a clamping ring for the asynchronous motor, wherein the clamping ring is welded together in a spot mode, machining the inner circle, the outer circle and the upper end face of the clamping ring for the asynchronous motor, reserving machining allowance diameters of the inner circle and the outer circle of the clamping ring for the asynchronous motor respectively of 4mm, machining the end face of 1mm, and not machining the other end face;
e) grinding a welding spot at the other end of the clamping ring for the asynchronous motor by using a grinding tool, and milling two half-joint surfaces and a welding groove, wherein the roughness of the processed surface of the workpiece is at least Ra3.2;
f) aligning two halves of the clamp ring for the asynchronous motor processed in the step e), clamping a workpiece by using a chuck jaw in an auxiliary manner, wherein the gap of the joint surface of the clamp ring for the asynchronous motor is not more than 0.02mm, spot-welding the two halves of the clamp ring for the asynchronous motor together, and spot-welding two points in the groove at the outer circle joint surface of the clamp ring for the asynchronous motor;
g) finely turning the sizes of the inner circle and the outer circle of the clamping ring for the asynchronous motor to the sizes of the drawing, reserving the machined end face for 2mm, adjusting the clamping ring, and aligning to the optimal state, wherein the grinding reserving amount of the machined end face is 0.3-0.5 mm;
h) opening a spot welding point in the excircle groove by using a polishing tool, and milling the excircle groove to the drawing size;
i) and (4) grinding the end face according to the actual machining size.
As shown in fig. 1: the number of spot welding can not be too much, and too much can produce more welding stress, and the influence on later stage stress release is great. The number of spot welding can not be too small, and potential safety hazards can exist due to the fact that spot welding is not firm in the machining process due to rotary machining.
As shown in fig. 2, the spot welding position is at the welding groove, the number of spot welding is not too large or too small, and the end face cannot be spot welded.
Claims (1)
1. A processing technique method of a snap ring for an asynchronous motor is characterized by comprising the following steps: the method comprises the following steps:
a) after alignment, dividing the whole clamping ring for the asynchronous motor into two parts by linear cutting;
b) milling two half joint surfaces of a half ring part of a snap ring for the asynchronous motor, wherein the roughness is at least Ra3.2;
c) aligning two halves of the snap ring for the asynchronous motor processed in the step b), adopting a chuck claw to assist in clamping a workpiece, wherein the gap of the split half surface is not more than 0.02mm, spot-welding the two halves of the snap ring for the asynchronous motor together, spot-welding one point on each of two end surfaces of the plane joint of the snap ring for the asynchronous motor, and spot-welding two points on each of the inner circle joint and the outer circle joint of the snap ring for the asynchronous motor;
d) roughly turning a clamping ring for the asynchronous motor, wherein the clamping ring is welded together in a spot mode, machining the inner circle, the outer circle and the upper end face of the clamping ring for the asynchronous motor, reserving machining allowance diameters of the inner circle and the outer circle of the clamping ring for the asynchronous motor respectively of 4mm, machining the end face of 1mm, and not machining the other end face;
e) grinding a welding spot at the other end of the clamping ring for the asynchronous motor by using a grinding tool, and milling two half-joint surfaces and a welding groove, wherein the roughness of the processed surface of the workpiece is at least Ra3.2;
f) aligning two halves of the clamp ring for the asynchronous motor processed in the step e), clamping a workpiece by using a chuck jaw in an auxiliary manner, wherein the gap of the joint surface of the clamp ring for the asynchronous motor is not more than 0.02mm, spot-welding the two halves of the clamp ring for the asynchronous motor together, and spot-welding two points in the groove at the outer circle joint surface of the clamp ring for the asynchronous motor;
g) finely turning the sizes of the inner circle and the outer circle of the clamping ring for the asynchronous motor to the sizes of the drawing, reserving the machined end face for 2mm, adjusting the clamping ring, and aligning to the optimal state, wherein the grinding reserving amount of the machined end face is 0.3-0.5 mm;
h) opening a spot welding point in the excircle groove by using a polishing tool, and milling the excircle groove to the drawing size;
i) and (4) grinding the end face according to the actual machining size.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911115902.9A CN110814653A (en) | 2019-11-15 | 2019-11-15 | Processing technology of snap ring for asynchronous motor |
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| CN201911115902.9A CN110814653A (en) | 2019-11-15 | 2019-11-15 | Processing technology of snap ring for asynchronous motor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112872731A (en) * | 2021-01-16 | 2021-06-01 | 江苏赛德力制药机械制造有限公司 | Manufacturing process of annular thin plate with wedge-shaped section |
| CN113909825A (en) * | 2021-11-09 | 2022-01-11 | 湖北三江航天红阳机电有限公司 | Processing method of large-size thin-wall load cabin |
| CN113977201A (en) * | 2021-11-11 | 2022-01-28 | 中国航发贵州黎阳航空动力有限公司 | Method for machining clamping groove of externally-hung ring segment |
| CN114770047A (en) * | 2022-05-11 | 2022-07-22 | 昆山众诚精密锻造有限公司 | Forging process of parachute snap ring |
| CN113977201B (en) * | 2021-11-11 | 2024-07-09 | 中国航发贵州黎阳航空动力有限公司 | Processing method of externally hung ring segment clamping groove |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112872731A (en) * | 2021-01-16 | 2021-06-01 | 江苏赛德力制药机械制造有限公司 | Manufacturing process of annular thin plate with wedge-shaped section |
| CN113909825A (en) * | 2021-11-09 | 2022-01-11 | 湖北三江航天红阳机电有限公司 | Processing method of large-size thin-wall load cabin |
| CN113977201A (en) * | 2021-11-11 | 2022-01-28 | 中国航发贵州黎阳航空动力有限公司 | Method for machining clamping groove of externally-hung ring segment |
| CN113977201B (en) * | 2021-11-11 | 2024-07-09 | 中国航发贵州黎阳航空动力有限公司 | Processing method of externally hung ring segment clamping groove |
| CN114770047A (en) * | 2022-05-11 | 2022-07-22 | 昆山众诚精密锻造有限公司 | Forging process of parachute snap ring |
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