Method, system, terminal and storage medium for machining articulated pistons of a rotary compressor

Abstract

The application relates to a hinge piston processing method and system of a rotor compressor, a terminal and a storage medium, and relates to the field of compressor processing.The method comprises the following steps: taking the radial direction of a piston body as the feed direction, milling the side wall of the piston body to obtain a groove, the groove is in a U shape along the axial direction, the groove penetrates the piston body along the axial direction, and the piston body is in a cylindrical shape; removing a residual material part in the groove, so that the bottom of the groove is in a circular arc shape along the axial direction; opening a chamfer on both sides of the groove through a side milling tool; removing burrs on the inner wall of the groove through axial layered milling processing of the inner wall of the groove by a fine milling tool; and precisely milling the inner wall of the groove through a ball head tool to obtain a hinge piston.The application has the effects of reducing the process difficulty and improving the size accuracy of the hinge piston.

Description

TECHNICAL FIELD

[0001] The present application relates to the compressor processing field, and particularly relates to a hinge piston processing method, system, terminal and storage medium of a rotor compressor. BACKGROUND

[0002] The rotor compressor is widely applied due to high efficiency, compact structure, small volume and light weight. The compression assembly is an important part in the rotor compressor. One kind of compression assembly hingedly connects the piston and the vane together, and the piston used in the compression assembly is called a hinge piston. The hinge piston is provided with an axial through groove on the outer peripheral wall. The vane is provided with a head end and a tail end. The head end is matched with the groove in shape and is swingably embedded in the groove to form a hinge between the vane and the hinge piston.

[0003] In the related art, a deep hole drill is used to punch along the axial direction of the piston body to obtain a through hole. Then, the side wall of the piston body is broken to change the through hole into a groove. Finally, the groove is reamed, honed and then ground to obtain the hinge piston.

[0004] According to the related art, the inventors consider that the process difficulty of breaking the side wall of the piston body is large, and it is difficult to control the perpendicularity of the groove formed, so that the size of the hinge piston does not meet the requirements. SUMMARY

[0005] In order to reduce the process difficulty and improve the size accuracy of the hinge piston, the present application provides a hinge piston processing method, system, terminal and storage medium of a rotor compressor.

[0006] In a first aspect, the present application provides a hinge piston processing method of a rotor compressor, which adopts the following technical scheme:

[0007] The hinge piston processing method of the rotor compressor comprises the following steps:

[0008] Milling processing is performed on the side wall of the piston body along the radial direction of the piston body to obtain a groove. The groove is in a U-shaped form along the axial direction. The groove penetrates the piston body along the axial direction, and the piston body is in a cylindrical form;

[0009] The residual material part in the groove is removed, so that the bottom of the groove is in a circular arc form along the axial direction;

[0010] A chamfer is milled on both sides of the groove by using a side milling cutter;

[0011] An axial layered milling processing is performed on the inner wall of the groove by using a fine milling cutter to remove burrs on the inner wall of the groove;

[0012] A precise milling is performed on the inner wall of the groove by using a ball head cutter to obtain the hinge piston.

[0013] By adopting the technical scheme, the side wall of the piston body is milled in the radial direction of the piston body to obtain the groove and remove the residual material part in the groove; then, chamfers are milled at both sides of the groove and axial layered milling is performed; finally, the inner wall of the groove is precisely milled to reduce the roughness of the inner wall, and the articulated piston is obtained. The perpendicularity of the groove can be ensured, the process difficulty is reduced, and the size accuracy of the articulated piston is improved.

[0014] Optionally, in the process of milling the side wall of the piston body, whether the tool movement path passes through the center of the piston body is detected;

[0015] If yes, the milling of the side wall of the piston body is continued;

[0016] If no, the feed point and the feed direction of the milling are obtained;

[0017] The milling is adjusted according to the machining curve of the piston body in the axial direction, the feed point and the feed direction.

[0018] By adopting the technical scheme, in the process of machining the groove, whether the tool movement path passes through the center of the piston body is detected to determine whether the tool movement path meets the requirements, and the milling is adjusted when the feed direction does not meet the requirements, so that the machined groove still meets the requirements.

[0019] Optionally, a first straight line and a second straight line are set according to the machining curve, the first straight line and the second straight line both pass through the center of the piston body, the first straight line intersects the machining curve, and the second straight line passes through the intersection point of the machining curve and the side wall of the piston body;

[0020] An angle bisector of an acute angle formed by the first straight line and the second straight line is obtained;

[0021] The intersection point of the angle bisector and the side wall of the piston body is used to update the feed point;

[0022] The angle bisector is used to update the feed direction;

[0023] The side wall of the piston body is milled according to the updated feed point and the updated feed direction.

[0024] By adopting the technical scheme, the feed point and the feed direction are updated through the angle bisector of the acute angle formed by the first straight line and the second straight line, and the side wall of the piston body is milled using the updated feed point and the updated feed direction, so that the milled groove still meets the design requirements.

[0025] Optionally, a preset curve of the articulated piston in the axial direction and a machining curve of the piston body in the axial direction are obtained;

[0026] determining whether a preset curve exists, so that the machining curve is located inside the preset curve and the machining curve has no intersection with the preset curve;

[0027] If yes, a step of obtaining a feed point and a feed direction of the milling is performed;

[0028] If no, the piston body is discarded, and the feed point and the feed direction of the milling are updated.

[0029] By adopting the above technical solution, in the case of incorrect feed direction, whether the piston body can still be remedied is determined by the preset curve and the machining curve, so that the size of the piston body still meets the design requirements.

[0030] Optionally, it is determined whether the depth of the groove reaches a preset depth;

[0031] If yes, a step of removing a residual material part in the groove is performed;

[0032] If no, a bottom curvature of the groove is obtained;

[0033] In the case where the bottom curvature is greater than a preset curvature, the milling of the groove is continued until the depth of the groove reaches the preset depth;

[0034] In the case where the bottom curvature is less than the preset curvature, a feed depth is set according to the preset curve and the machining curve of the articulating piston along the axial direction; the milling of the groove is performed according to the feed depth; and the residual material part and the bottom residual material in the groove are removed.

[0035] By adopting the above technical solution, in the case where the depth of the groove does not reach the preset depth, the processing method of the groove in the future is determined according to the bottom curvature of the groove, so that the processed groove still meets the design requirements.

[0036] Optionally, a first precision milling of the inner wall of the groove is performed by a ball nose cutter;

[0037] A second precision milling of the inner wall of the groove is performed by the ball nose cutter to obtain the articulating piston, and the milling depth of the second precision milling is less than the milling depth of the first precision milling.

[0038] By adopting the above technical solution, at least two precision millings of the inner wall of the groove are performed, which helps to gradually and finely process the groove to avoid excessive cutting burden and ensure the final quality of the groove.

[0039] Optionally, the roughness of the inner wall of the groove is detected;

[0040] A rough area of the inner wall of the groove is determined according to the roughness;

[0041] According to the position of the rough area, the movement path is designed to pass through the rough area and the movement path is the shortest;

[0042] The inner wall of the groove is precisely milled according to the movement path by the ball-end cutter.

[0043] According to the above technical scheme, the rough area of the inner wall of the groove can be precisely milled, so that the inner wall of the groove is smooth enough. Moreover, the movement path required for precise milling is the shortest, which can shorten the processing time and improve the processing efficiency.

[0044] In the second aspect, the application provides a hinge piston processing system of a rotary compressor, which adopts the following technical scheme:

[0045] A hinge piston processing system of a rotary compressor, comprising:

[0046] The acquisition module is configured to acquire the feed direction, the feed point, the processing curve, the first straight line, the second straight line, the preset curve, the preset depth, the bottom curvature, and the roughness.

[0047] The memory is configured to store the program of the hinge piston processing method of the rotary compressor according to any one of the above aspects.

[0048] The processor is configured to load and execute the program in the memory, and implement the hinge piston processing method of the rotary compressor according to any one of the above aspects.

[0049] According to the above technical scheme, the side wall of the piston body is milled with the radial direction of the piston body as the feed direction, a groove is obtained, and the residual material part in the groove is removed. Then, chamfers are milled on both sides of the groove and axial layered milling is performed. Finally, the inner wall of the groove is precisely milled to reduce the roughness of the inner wall, and the hinge piston is obtained. On the premise of ensuring the perpendicularity of the groove, the process difficulty is reduced, and the size accuracy of the hinge piston is improved.

[0050] In the third aspect, the application provides an intelligent terminal, which adopts the following technical scheme:

[0051] The intelligent terminal comprises a memory and a processor, and the memory stores a computer program capable of being loaded and executed by the processor to implement the hinge piston processing method of the rotary compressor according to any one of the above aspects.

[0052] By adopting the technical scheme, the side wall of the piston body is milled with the radial direction of the piston body as the feed direction to obtain a groove and remove the residual material part in the groove; then, chamfers are milled on both sides of the groove and axial layered milling is performed; finally, precise milling is performed on the inner wall of the groove to reduce the roughness of the inner wall, and the articulated piston is obtained. The perpendicularity of the groove can be ensured, the process difficulty is reduced, and the size accuracy of the articulated piston is improved.

[0053] In a fourth aspect, the application provides a computer storage medium capable of storing a corresponding program, having the characteristics of facilitating the reduction of process difficulty and the improvement of the size accuracy of the articulated piston, and adopting the following technical scheme:

[0054] A computer readable storage medium stores a computer program capable of being loaded by a processor and executing any one of the articulated piston machining methods of the rotary compressor.

[0055] By adopting the technical scheme, the side wall of the piston body is milled with the radial direction of the piston body as the feed direction to obtain a groove and remove the residual material part in the groove; then, chamfers are milled on both sides of the groove and axial layered milling is performed; finally, precise milling is performed on the inner wall of the groove to reduce the roughness of the inner wall, and the articulated piston is obtained. The perpendicularity of the groove can be ensured, the process difficulty is reduced, and the size accuracy of the articulated piston is improved.

[0056] In summary, the application has at least one of the following beneficial technical effects:

[0057] 1. By adopting the technical scheme, the side wall of the piston body is milled with the radial direction of the piston body as the feed direction to obtain a groove and remove the residual material part in the groove; then, chamfers are milled on both sides of the groove and axial layered milling is performed; finally, precise milling is performed on the inner wall of the groove to reduce the roughness of the inner wall, and the articulated piston is obtained. The perpendicularity of the groove can be ensured, the process difficulty is reduced, and the size accuracy of the articulated piston is improved.

[0058] 2. During the machining of the groove, whether the tool movement path passes through the center of the piston body is detected to determine whether the tool movement path meets the requirements, and when the feed direction does not meet the requirements, the milling is adjusted so that the machined groove still meets the requirements.

[0059] 3. When the depth of the groove does not reach the preset depth, the processing method of the groove is determined through the curvature of the bottom of the groove, so that the machined groove still meets the design requirements. BRIEF DESCRIPTION OF DRAWINGS

[0060] Figure 1 is a schematic diagram of a rotary compressor provided by an embodiment of the application.

[0061] Figure 2 is a flowchart of a hinge piston processing method of a rotary compressor provided by an embodiment of the present application.

[0062] Figure 3 is a schematic diagram of a hinge piston processing method of a rotary compressor provided by an embodiment of the present application.

[0063] Figure 4 is a schematic diagram of a hinge piston processing method of a rotary compressor provided by an embodiment of the present application.

[0064] Figure 5 is a schematic diagram of a hinge piston processing method of a rotary compressor provided by an embodiment of the present application.

[0065] Figure 6 is a schematic diagram of a hinge piston processing method of a rotary compressor provided by an embodiment of the present application.

[0066] Figure 7 is a schematic diagram of a hinge piston processing method of a rotary compressor provided by an embodiment of the present application.

[0067] Figure 8 is a schematic diagram of a hinge piston processing method of a rotary compressor provided by an embodiment of the present application.

[0068] Figure 9 is a flowchart of a hinge piston processing method of a rotary compressor provided by an embodiment of the present application.

[0069] Figure 10 is a flowchart of a hinge piston processing method of a rotary compressor provided by an embodiment of the present application.

[0070] Figure 11 is a schematic diagram of a hinge piston processing method of a rotary compressor provided by an embodiment of the present application.

[0071] Figure 12 is a flowchart of a hinge piston processing method of a rotary compressor provided by an embodiment of the present application.

[0072] Figure 13 is a schematic diagram of a hinge piston processing method of a rotary compressor provided by an embodiment of the present application.

[0073] Figure 14 is a flowchart of a hinge piston processing method of a rotary compressor provided by an embodiment of the present application.

[0074] Figure 15 is a schematic diagram of a hinge piston processing method of a rotary compressor provided by an embodiment of the present application.

[0075] Figure 16 is a flowchart of a processing method of a hinged piston of a rotary compressor provided by an embodiment of the present application. DETAILED DESCRIPTION

[0076] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application. Figures 1-16 and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0077] An embodiment of the present application discloses a schematic diagram of a rotary compressor. Referring to Figure 1 , the rotary compressor comprises a hinged piston 1, a sliding vane 2 and a cylinder 3. The cylinder 3 is provided with an internal cavity and a sliding vane groove in communication with the internal cavity. The sliding vane 2 is slidably arranged in the sliding vane groove, and one end of the sliding vane 2 is hinged to the hinged piston 1. The hinged piston 1 is provided with a groove penetrating in the axial direction. Further, the hinged end of the sliding vane 2 and the hinged piston 1 is spherical. Further, the size of the groove is much smaller than the size of the hinged piston 1. The present application discloses a processing method of a hinged piston, especially a processing process of opening a groove on the piston body.

[0078] An embodiment of the present application discloses a processing method of a hinged piston of a rotary compressor. Referring to Figure 2 , the method comprises:

[0079] Step S21: milling the side wall of the piston body in the radial direction of the piston body to obtain a groove, the groove being in the shape of U along the axial direction, the groove penetrating the piston body along the axial direction, and the piston body being in the shape of a cylinder.

[0080] Illustratively, referring to Figure 3 , a disc cutter is used to mill the side wall of the piston body 31 in the radial direction of the piston body to obtain a groove 32.

[0081] Step S22: removing the residual material part in the groove to make the bottom of the groove in the shape of a circular arc along the axial direction.

[0082] The groove needs to be hinged to the sliding vane, and the hinged end of the sliding vane is spherical, so it is necessary to generate a shape corresponding to the hinged end of the sliding vane in the groove. Since the groove is in the shape of U in step S21, the edge curve of the bottom of the groove along the axial direction is not in the shape of a circular arc, so it is necessary to remove the residual material part in the groove to make the groove in the shape of a circular arc along the axial direction. The bottom of the groove refers to the part of the groove close to the axis of the piston body in the axial direction.

[0083] Illustratively, referring to Figure 4 , the residual material part 33 in the groove 32 is removed to make the groove in the shape of a circular arc along the axial direction.

[0084] Step S23: chamfering is performed on both sides of the groove by a side milling tool.

[0085] The opening on both sides of the groove refers to the opening of the piston body close to the side wall in the axial direction. For example, refer to Figure 5 Chamfering 34 is performed on both sides of the groove 32.

[0086] The angle of the chamfer can be adjusted according to actual needs, which is not limited in the present application.

[0087] Step S24: axial layered milling processing is performed on the inner wall of the groove by a finishing milling tool to remove burrs on the inner wall of the groove.

[0088] After chamfering is performed on both sides of the groove, burrs will be generated on the inner wall of the groove. In this step, axial layered milling processing is performed on the inner wall of the groove to remove these burrs and ensure the inner wall of the groove. For example, refer to Figure 5 、 Figure 6 and Figure 7 After chamfering 34 is performed on both sides of the groove 32, burrs 35 will be generated on the inner side of the chamfer. Axial layered milling processing is performed on the inner wall of the groove 32 to remove these burrs 35.

[0089] Step S25: precise milling is performed on the inner wall of the groove by a ball head tool to obtain a hinged piston.

[0090] Since the groove needs to be hinged with the sliding vane, and the hinged end of the sliding vane needs to be able to rotate in the groove, the inner wall of the groove needs to be smooth enough. For example, refer to Figure 8 Precise milling is performed on the inner wall 36 of the groove 32 by a ball head tool to make the inner wall 36 of the groove 32 as smooth as possible to obtain a hinged piston.

[0091] Optionally, first precise milling is performed on the inner wall of the groove by a ball head tool; second precise milling is performed on the inner wall of the groove by a ball head tool to obtain a hinged piston, and the milling depth of the second precise milling is less than the milling depth of the first precise milling. For example, the milling depth of the first precise milling is 0.4 mm, and the milling depth of the second precise milling is 0.2 mm.

[0092] Further, to ensure the precision of the first precise milling, the first precise milling can be repeated multiple times. For example, the inner wall of the groove is subjected to twice first precise milling with a milling depth of 0.4 mm.

[0093] In summary, the side wall of the piston body is milled with the radial direction of the piston body as the feed direction to obtain a groove and remove the residual material in the groove; then, chamfers are milled at both sides of the groove and axial layered milling is performed; finally, the inner wall of the groove is precisely milled to reduce the roughness of the inner wall to obtain the articulated piston. The process difficulty can be reduced and the size accuracy of the articulated piston can be improved under the premise of ensuring the perpendicularity of the groove.

[0094] In the following embodiments, the feed point or feed direction of the milling cutter may be wrong during the milling process of the side wall of the piston body. In this embodiment, the size of the groove can be restored to normal by adjusting the milling method. The embodiment of the application discloses a processing method of an articulated piston of a rotary compressor. Referring to Figure 9 , the method comprises the following steps.

[0095] Step S901: During the milling of the side wall of the piston body, it is detected whether the tool movement path passes through the center of the piston body.

[0096] The milling of the side wall of the piston body can refer to step S21 of the embodiment shown in Figure 2 .

[0097] If the tool movement path passes through the center of the piston body, step S902 is performed.

[0098] If the tool movement path does not pass through the center of the piston body, step S903 is performed.

[0099] The piston body is a cylinder, and the center of the piston body refers to the center of the cylinder in the axial direction.

[0100] Optionally, the center coordinates of the piston body are determined according to the piston body and the position of the clamp for clamping the piston body; the feed direction and the feed point in the milling process are obtained; the tool movement path is formed with the feed point as the origin and the feed direction as the direction; and it is detected whether the tool movement path passes through the center of the piston body. When the milling is performed on an intelligent lathe, the feed direction and the feed point can be obtained by various sensors installed on the intelligent lathe.

[0101] Step S902: If yes, the milling of the side wall of the piston body is continued.

[0102] If the tool movement path passes through the center of the piston body, it indicates that the milling is normal, and the U-shaped groove can have good perpendicularity and meet the design requirements.

[0103] Step S903: If no, the feed point and the feed direction of the milling are obtained.

[0104] If the tool movement path does not pass through the center of the piston body, it indicates that the milling process is abnormal, and if the current milling process continues to be performed, it will result in poor perpendicularity of the groove, which cannot meet the design requirements.

[0105] In actual scenarios, the following situations may occur, resulting in the tool feed direction not passing through the center of the piston body: 1. The tool feed direction is correct, but the tool feed point is incorrect; 2. The tool feed direction is incorrect, but the tool feed point is correct; 3. Both the tool feed direction and the tool feed point are incorrect.

[0106] On the other hand, the applicant found that because the process of machining the articulated piston also includes milling chamfers on both sides of the groove, even if part of the material is mistakenly milled due to an incorrect tool feed direction, as long as this part of the material is the material that should be removed in the step of milling the chamfer, the final articulated piston can still meet the design requirements by changing the tool feed point and tool feed direction of the milling process. Therefore, before this step, it is also necessary to determine whether the piston body still has a chance for remediation, and for this purpose, the present embodiment discloses a processing method for an articulated piston of a rotary compressor. Referring to Figure 10 , the method comprises:

[0107] Step S9031: obtaining a preset curve of the articulated piston in the axial direction and a machining curve of the piston body in the axial direction.

[0108] The preset curve refers to the edge curve of the groove of the articulated piston in the axial direction that meets the design requirements.

[0109] The machining curve refers to the edge curve of the groove of the piston body in the axial direction during the milling process of the side wall of the piston body.

[0110] Step S9032: determining whether there is a preset curve that makes the machining curve inside the preset curve and the machining curve has no intersection with the preset curve.

[0111] If there is a preset curve that makes the machining curve inside the preset curve and the machining curve has no intersection with the preset curve, step S9033 is performed;

[0112] If there is no preset curve that makes the machining curve inside the preset curve and the machining curve has no intersection with the preset curve, step S9034 is performed.

[0113] For example, referring to Figure 11 , according to the size of the piston body, the preset curve 1101 and the machining curve 1102 are drawn on the same circle corresponding to the side wall of the piston body; each point on the preset curve 1101 is simultaneously rotated around the center of the circle; during the rotation, it is determined whether the machining curve 1102 will be inside the preset curve 1101 and the machining curve 1102 has no intersection with the preset curve 1101. In Figure 11When the preset curve 1101 is located at position A, the machining curve 1102 is located inside the preset curve 1101 and the machining curve 1102 has no intersection with the preset curve 1101 at the same time.

[0114] Step S9033: If yes, a step of acquiring the feed point and the feed direction of the milling machining is performed.

[0115] If the preset curve exists, it indicates that the feed depth of the milling machining is shallow, and the groove on the piston body can still be machined by the feed point and the feed direction of the milling machining, so that the size of the hinged piston finally obtained meets the design requirements.

[0116] Step S9034: If no, the piston body is discarded, and the feed point and the feed direction of the milling machining are updated.

[0117] If the preset curve does not exist, it indicates that the feed depth of the milling machining is too deep, resulting in that the groove on the piston body is too deep, and the piston body cannot be machined into a hinged piston and needs to be discarded.

[0118] Optionally, the feed point and the feed direction of the milling machining are updated, so that a straight line formed with the feed point as the origin and the feed direction as the direction passes through the center of the piston body.

[0119] In summary, in the case of incorrect feed direction, whether the piston body can still be remedied so that the size of the piston body still meets the design requirements is determined by the preset curve and the machining curve.

[0120] Step S904: Adjust the milling machining according to the machining curve, the feed point and the feed direction of the piston body in the axial direction.

[0121] For example, the real image of the piston body in the axial direction is acquired by a camera; and the machining curve of the groove of the piston body in the axial direction is recognized from the real image.

[0122] The specific content of adjusting the milling machining can be referred to the following Figure 12 embodiment.

[0123] In summary, in the process of machining the groove, whether the tool movement path passes through the center of the piston body is detected to determine whether the tool movement path meets the requirements, and when the feed direction does not meet the requirements, the milling machining is adjusted so that the machined groove still meets the requirements.

[0124] In the following embodiments, if the feed depth of the milling machining is shallow after an abnormal situation occurs in the milling machining, the milling machining still has room for remedy. For this purpose, the application discloses a hinged piston machining method of a rotor compressor. Referring to Figure 12 , the method comprises:

[0125] Step S1201: setting a first straight line and a second straight line according to the machining curve, the first straight line and the second straight line both passing through the center of the piston body, the first straight line intersecting the machining curve, the second straight line passing through the intersection point of the machining curve and the side wall of the piston body.

[0126] The second straight line only passes through the intersection point of the machining curve and the side wall of the piston body, and does not pass through the points on the machining curve other than the aforementioned intersection point.

[0127] For example, referring to Figure 13 , the first straight line 1302 and the second straight line 1303 both pass through the center O of the piston body, the first straight line 1302 is tangent to the machining curve 1301, and the second straight line 1303 passes through the intersection point of the machining curve 1301 and the side wall of the piston body, and the second straight line 1302 does not pass through other points on the machining curve 1301.

[0128] Step S1202: obtaining an angle bisector of the acute angle between the first straight line and the second straight line.

[0129] For example, referring to Figure 13 , the acute angle between the first straight line 1302 and the second straight line 1303 is angle α, and the center O is also the vertex of angle α, and the angle bisector of angle α is straight line OA, wherein the angle bisector OA is closer to the intersection point of the machining curve 1301 than to the intersection point of the machining curve 1301.

[0130] Step S1203: updating the feed point with the intersection point of the angle bisector and the side wall of the piston body.

[0131] Optionally, two intersection points of the angle bisector and the side wall of the piston body are obtained, and the intersection point closer to the machining curve is taken as the updated feed point.

[0132] For example, referring to Figure 13 , point A is taken as the updated feed point.

[0133] Step S1204: updating the feed direction with the angle bisector.

[0134] For example, referring to Figure 13 , the updated feed direction is taken as the ray AO.

[0135] Step S1205: milling the side wall of the piston body according to the updated feed point and the updated feed direction.

[0136] In Figure 9On the basis of the shown embodiment, although the milling process is abnormal, but due to the existence of chamfer, at this time the groove still has room for remediation, the piston body can be milled according to the updated feed point and the updated feed direction, so as to ensure that the hinge piston obtained after the last processing still meets the design requirements.

[0137] In summary, by updating the feed point and the feed direction through the bisector of the acute angle between the first straight line and the second straight line, and using the updated feed point and the feed direction to mill the side wall of the piston body, the groove after milling still meets the design requirements.

[0138] In the following embodiments, after the side wall of the piston body is milled to obtain a U-shaped groove, the depth of the groove can also be detected to determine the subsequent operation steps according to the actual depth of the groove. The present application discloses a hinge piston processing method of a rotary compressor. Referring to Figure 14 , the method comprises:

[0139] Step S1401: judging whether the depth of the groove reaches a preset depth.

[0140] The preset depth is a constant. The preset depth is related to the design requirements of the hinge piston.

[0141] If the depth of the groove reaches the preset depth, step S1402 is executed;

[0142] If the depth of the groove does not reach the preset depth, steps S1403 to S1407 are executed.

[0143] For example, the real image of the piston body in the axial direction is obtained by the camera; the depth of the groove is identified by the real image.

[0144] Step S1402: if yes, the step of removing the residual part in the groove is executed.

[0145] When the depth of the groove reaches the preset depth, it indicates that the depth of the groove has met the design requirements, and the subsequent steps can be continued.

[0146] Step S1403: if no, the curvature of the bottom of the groove is obtained.

[0147] When the depth of the groove does not reach the preset depth, it indicates that the depth of the groove does not meet the design requirement, the depth of the groove is too shallow, and the depth of the groove needs to be adjusted. In actual production process, the groove does not reach the preset depth is caused by the wear of the milling cutter or the position offset of the milling cutter, so the bottom curvature of the groove is obtained to determine whether the milling cutter is worn. If the bottom curvature is the same as the preset curvature, it indicates that the wear degree of the milling cutter is within the error range, and the depth of the groove does not reach the preset depth is caused by the position offset of the milling cutter. If the bottom curvature is greater than or less than the preset curvature, it indicates that the wear length of the milling cutter has exceeded the error range, and the depth of the groove does not reach the preset depth is caused by the wear of the milling cutter.

[0148] The bottom curvature refers to the curvature corresponding to the bottom of the groove of the piston body close to the center of the piston body in the axial direction. The bottom curvature is determined by the milling cutter used in the milling process.

[0149] For example, the real image of the piston body in the axial direction is obtained through the camera; the machining curve of the groove of the piston body in the axial direction is identified through the real image; and the bottom curvature of the groove is obtained according to the machining curve.

[0150] Step S1404: In the case where the bottom curvature is greater than the preset curvature, the milling process is continued for the groove until the depth of the groove reaches the preset depth.

[0151] The preset curvature refers to the curvature corresponding to the bottom of the groove of the articulated piston close to the center of the piston body in the axial direction. The specific value of the preset curvature is related to the design requirement of the articulated piston.

[0152] Optionally, the difference between the depth of the groove and the preset depth is calculated; the sum of the difference and the feed depth of the milling process is used to update the feed depth; and the milling process is performed on the groove according to the updated feed depth, so that the depth of the groove reaches the preset depth.

[0153] For example, please refer to Figure 15 In the case where the bottom curvature is greater than the preset curvature, the milling process is continued for the groove until the depth of the groove reaches the preset depth, and the groove 1501 is obtained. Although there is a gap between the groove 1501 at this time and the ideal groove 1502, since the step of removing the residual material part in the groove 1501 is performed after this step, although there is a difference in shape between the two grooves, the excess part of the groove 1501 compared with the groove 1502 can be removed by the step of removing the residual material part in the groove 1501, which has no effect on the subsequent other steps and does not affect the size of the articulated piston.

[0154] It should be noted that steps S1404 to S1407 are only temporary relief measures to ensure that the articulated piston can still meet the design requirements when the depth of the groove of the current piston body is insufficient.

[0155] Step S1405: In the case where the bottom curvature is less than the preset curvature, the depth of cut is set according to the preset curve and the machining curve of the articulated piston along the axial direction.

[0156] Optionally, the movement distance required for the preset curve to intersect with the machining curve is determined according to the preset curve and the machining curve of the articulated piston along the axial direction; and the movement distance is taken as the depth of cut.

[0157] For example, as shown in Figure 15 , the preset curve intersects with the machining curve, the movement distance required for the preset curve is L, and the depth of cut is also L.

[0158] Step S1406: Milling the groove according to the depth of cut.

[0159] For example, as shown in Figure 15 , the groove is milled according to the depth of cut to obtain the groove.

[0160] Step S1407: Remove the residual material in the groove and the bottom residual material.

[0161] For example, as shown in Figure 15 , in the case where the bottom curvature is less than the preset curvature, if the milling of the groove continues according to the manner of step S1404 until the depth of the groove reaches the preset depth, too much material in the bottom of the groove will be milled out, resulting in a serious deviation of the actual size of the articulated piston from the design requirements. Therefore, the depth of cut for milling needs to be considered in this step so that the preset curve intersects with the machining curve to obtain the groove 1503. However, this will cause residual material to remain in the bottom of the groove 1503, so the residual material in the groove 1503 can be removed at the same time when the residual material in the groove 1503 is removed.

[0162] In summary, in the case where the depth of the groove does not reach the preset depth, the processing manner of the groove is determined through the bottom curvature of the groove to ensure that the processed groove still meets the design requirements.

[0163] In the following embodiments, after the inner wall of the groove is precisely milled by the ball-end cutter, the roughness of the inner wall of the groove can be detected. When it is found that there are areas with high roughness on the inner wall, the areas can be precisely milled again to ensure that the inner wall is smooth everywhere. Figure 16 The method comprises the following steps.

[0164] Step S1601: detecting the roughness of the inner wall of the groove.

[0165] Optionally, the roughness of the inner wall of the groove is detected by using a roughness meter to obtain the roughness.

[0166] Optionally, the inner wall image of the groove is obtained by a camera; the texture feature of the inner wall image is extracted; and the roughness is quantified to obtain the roughness.

[0167] Step S1602: determining the rough area of the inner wall of the groove according to the roughness.

[0168] Optionally, the area of the inner wall of the groove with a roughness greater than a preset roughness is determined as the rough area. The preset roughness is a constant preset in advance.

[0169] Step S1603: designing a moving path according to the position of the rough area, so that the moving path passes through the rough area and the moving path is the shortest.

[0170] Optionally, a candidate moving path passing through the rough area is generated by a traversal algorithm; the path length of each candidate moving path is calculated; and the candidate moving path with the shortest path length is taken as the moving path required in this step.

[0171] Optionally, a path planning model is called to plan a path for the position of the rough area to obtain the moving path. The path planning model adopts a graph model, a dynamic programming algorithm or a heuristic algorithm.

[0172] Step S1604: performing third precision milling on the inner wall of the groove according to the moving path by using a ball-end cutter.

[0173] Illustratively, the ball-end cutter is used to perform Disonna precision milling on the inner wall of the groove according to the moving path, so that the rough area becomes smooth.

[0174] In summary, the rough area of the inner wall of the groove can be precision milled to make the inner wall of the groove smooth enough. Moreover, the moving path required for precision milling is the shortest, which can shorten the processing time and improve the processing efficiency.

[0175] Based on the same inventive concept, the embodiment of the present application provides a hinge piston processing system of a rotor compressor, comprising:

[0176] The acquisition module is configured to acquire the feed direction, the feed point, the processing curve, the first straight line, the second straight line, the preset curve, the preset depth, the bottom curvature and the roughness.

[0177] The memory is configured to store the program of the hinge piston processing method of the rotor compressor.

[0178] A processor, a program in the memory can be loaded and executed by the processor to implement the hinge piston processing method of the rotor compressor of any one of the above.

[0179] In summary, the side wall of the piston body is milled with the radial direction of the piston body as the feed direction to obtain a groove and remove the residual material part in the groove; then, chamfers are milled on both sides of the groove and axial layered milling is performed; finally, the inner wall of the groove is precisely milled to reduce the roughness of the inner wall to obtain the hinge piston. The process difficulty can be reduced and the size accuracy of the hinge piston can be improved under the premise of ensuring the perpendicularity of the groove.

[0180] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional modules is exemplified, and in actual application, the above functions can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0181] The embodiment of the present application provides a computer readable storage medium, which stores a computer program capable of being loaded and executed by a processor to implement a hinge piston processing method of a rotor compressor.

[0182] The computer storage medium includes, for example, a U disk, a mobile hard disk, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk and various program code storage media.

[0183] Based on the same inventive concept, the embodiment of the present application provides an intelligent terminal, which comprises a memory and a processor, and the memory stores a computer program capable of being loaded and executed by the processor to implement a hinge piston processing method of a rotor compressor.

[0184] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional modules is exemplified, and in actual application, the above functions can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0185] The above are only preferred embodiments of the present application, not intended to limit the protection scope of the present application, any one feature disclosed in the specification (including the abstract and the drawings) can be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated, each feature is only an example of a series of equivalent or similar features.

Claims

1. A hinge piston machining method of a rotary compressor, characterized by, The method comprises: milling the side wall of the piston body to obtain a groove, the groove being in U shape along the axial direction, the groove penetrating through the piston body along the axial direction, and the piston body being a cylinder, the milling being performed along the radial direction of the piston body as the feed direction; removing a residual material portion in the groove to make the bottom of the groove in circular arc shape along the axial direction; milling a chamfer at both side openings of the groove by a side milling tool; performing axial layered milling on the inner wall of the groove by a finishing milling tool to remove burrs on the inner wall of the groove; performing precise milling on the inner wall of the groove by a ball head tool to obtain the articulated piston; during the milling of the side wall of the piston body, detecting whether the tool movement path passes through the center of the piston body; if yes, continuing the milling of the side wall of the piston body; if no, obtaining a feed point and a feed direction of the milling; adjusting the milling according to the machining curve of the piston body along the axial direction, the feed point and the feed direction.

2. The articulated piston machining method of a rotary compressor according to claim 1, characterized by, The adjusting of the milling according to the machining curve of the piston body along the axial direction, the feed point and the feed direction comprises: setting a first straight line and a second straight line according to the machining curve, the first straight line and the second straight line both passing through the center of the piston body, the first straight line intersecting the machining curve, and the second straight line passing through the intersection point of the machining curve and the side wall of the piston body; obtaining an angle bisector of an acute angle formed by the first straight line and the second straight line; updating the feed point with the intersection point of the angle bisector and the side wall of the piston body; updating the feed direction with the angle bisector; milling the side wall of the piston body according to the updated feed point and the updated feed direction.

3. The articulated piston machining method of a rotary compressor according to claim 1, characterized by, The method further comprises: obtaining a preset curve of the articulated piston along the axial direction and a machining curve of the piston body along the axial direction; judging whether the preset curve exists, the machining curve is located inside the preset curve, and the machining curve has no intersection point with the preset curve; if yes, performing the step of obtaining the feed point and the feed direction of the milling; if no, discarding the piston body and updating the feed point and the feed direction of the milling.

4. The articulated piston machining method of a rotary compressor according to claim 1, characterized by, After the step of milling the side wall of the piston body to obtain the groove, the method further comprises: judging whether the depth of the groove reaches a preset depth; if yes, performing the step of removing the residual material portion in the groove; if no, obtaining a bottom curvature of the groove; in the case that the bottom curvature is greater than a preset curvature, continuously milling the groove until the depth of the groove reaches the preset depth; in the case that the bottom curvature is less than the preset curvature, setting a feed depth according to the preset curve and the machining curve of the articulated piston along the axial direction, milling the groove according to the feed depth, and removing the residual material portion and a bottom residual material in the groove.

5. The articulated piston machining method of a rotary compressor according to claim 1, wherein The method further comprises: performing first precise milling on the inner wall of the groove by the ball head tool; The ball-end cutter is used to perform second precision milling on the inner wall of the groove to obtain the articulated piston, and the milling depth of the second precision milling is less than the milling depth of the first precision milling.

6. The articulated piston machining method of a rotary compressor according to claim 5, wherein The method comprises: detecting roughness of the inner wall of the groove; determining a rough area of the inner wall of the groove according to the roughness; designing a moving path according to the position of the rough area, so that the moving path passes through the rough area and the moving path is the shortest; performing third precision milling on the inner wall of the groove by the ball-end cutter according to the moving path.

7. A hinge piston machining system for a rotary compressor, characterized by, The system comprises: an acquisition module configured to acquire a feed direction, a feed point, a machining curve, a first straight line, a second straight line, a preset curve, a preset depth, a bottom curvature, and roughness; a memory configured to store a program of the method for processing the articulated piston of the rotor compressor according to any one of claims 1 to 6; a processor, the program in the memory being loadable and executable by the processor and implementing the method for processing the articulated piston of the rotor compressor according to any one of claims 1 to 6.

8. A smart terminal, characterized by a memory and a processor, the memory storing a computer program loadable and executable by the processor and implementing the method for processing the articulated piston of the rotor compressor according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, a computer program loadable and executable by the processor and implementing the method for processing the articulated piston of the rotor compressor according to any one of claims 1 to 6.

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