Machining method and system for hinged piston of rotor compressor, terminal and storage medium

Abstract

The invention relates to a machining method and system for a hinged piston of a rotor compressor, a terminal and a storage medium, and relates to the field of compressor machining.The method comprises the steps that the radial direction of a piston body serves as the feed direction, the side wall of the piston body is milled, a groove is obtained, the groove is in a U shape in the axial direction, and the groove penetrates through the piston body in the axial direction; the piston body is cylindrical; removing a residual material part in the groove to enable the bottom of the groove to be in a circular arc shape in the axial direction; chamfers are milled at openings in the two sides of the groove through a side milling cutter; carrying out axial layered milling on the inner wall of the groove through a finish milling cutter so as to remove burrs on the inner wall of the groove; and the inner wall of the groove is precisely milled through a ball head cutter, and the hinged piston is obtained. The method has the effects that the process difficulty is reduced, and the accuracy of the size of the hinged piston is improved.

Description

Technical Field

[0001] The present application relates to the field of compressor processing, and in particular to a method, system, terminal and storage medium for processing an articulated piston of a rotary compressor. Background Art

[0002] Rotary compressors are widely used due to their high efficiency, compact structure, small size and light weight. The compression assembly is an important part of the rotary compressor. One type of compression assembly hinges the piston and the vane together. The piston used in this type of compression assembly is called an articulated piston. The outer peripheral wall of the articulated piston is provided with an axially penetrating groove. The vane has a head end and a tail end. The shape of the head end matches the groove and can be swingably embedded in the groove to form an articulation between the vane and the articulated piston.

[0003] In the related technology, when manufacturing an articulated piston, a deep hole drill is used to drill a hole along the axial direction of the piston body to obtain a through hole. After that, the side wall of the piston body is broken to make the through hole into a groove. Finally, the groove is reamed, honed, and then ground to obtain an articulated piston.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the process of breaking the side wall of the piston body is relatively difficult, and it is difficult to control the verticality of the formed groove, so that the size of the articulated piston does not meet the requirements. Summary of the invention

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

[0006] In a first aspect, the present application provides a method for processing an articulated piston of a rotary compressor, which adopts the following technical solution: A method for processing an articulated piston of a rotary compressor, comprising: The side wall of the piston body is milled with the radial direction of the piston body as the cutting direction to obtain a groove, which is U-shaped along the axial direction and penetrates the piston body along the axial direction, and the piston body is cylindrical; Remove the residual material in the groove so that the bottom of the groove is in an arc shape along the axial direction; Use a side milling tool to mill chamfers on both sides of the groove; The inner wall of the groove is subjected to axial layered milling by a fine milling tool to remove burrs on the inner wall of the groove; The inner wall of the groove is precisely milled by a ball-end tool to obtain an articulated piston.

[0007] By adopting the above technical solution, 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 the residual material in the groove is removed; then, chamfers are milled on the openings 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 an articulated piston. Under the premise of ensuring the verticality of the groove, the process difficulty can be reduced and the dimensional accuracy of the articulated piston can be improved.

[0008] Optionally, during the milling process of the side wall of the piston body, it is detected whether the tool movement path passes through the center of the piston body; If yes, continue to mill the side wall of the piston body; If not, the feed point and feed direction of the milling process are obtained; Adjust the milling process according to the machining curve, feed point and feed direction of the piston body in the axial direction.

[0009] By adopting the above technical solution, during the process of machining the groove, it will be detected whether the tool movement path passes through the center of the piston body to determine whether the tool movement path meets the requirements, and when the feed direction does not meet the requirements, the milling process is adjusted so that the machined groove still meets the requirements.

[0010] Optionally, a first straight line and a second straight line are set according to the processing curve, both of which pass through the center of the piston body, the first straight line intersects with the processing curve, and the second straight line passes through the intersection of the processing curve and the side wall of the piston body; Obtaining the angle bisector of the acute angle between the first straight line and the second straight line; Update the cutting point with the intersection of the angle bisector and the side wall of the piston body; Update the cutting direction with the angle bisector; According to the updated feed point and the updated feed direction, the side wall of the piston body is milled.

[0011] By adopting the above technical solution, the feed point and feed direction are updated by the bisector of the acute angle between 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 feed direction, so that the groove after milling still meets the design requirements.

[0012] Optionally, a preset curve of the articulated piston in the axial direction and a processing curve of the piston body in the axial direction are obtained; Determine whether there is a preset curve, so that the processing curve is located inside the preset curve, and the processing curve has no intersection with the preset curve; If yes, the step of obtaining the feed point and feed direction of the milling process is performed; If not, the piston body is discarded and the feed point and feed direction of the milling process are updated.

[0013] By adopting the above technical solution, in the case of an error in the feed direction, it is determined by the preset curve and the processing curve whether the piston body can be remedied, so that the size of the piston body still meets the design requirements.

[0014] Optionally, determining whether the depth of the groove reaches a preset depth; If yes, the step of removing the residual material in the groove is performed; If not, obtain the bottom curvature of the groove; When the bottom curvature is greater than the preset curvature, the groove is continuously milled until the depth of the groove reaches the preset depth; When the bottom curvature is less than the preset curvature, the feed depth is set according to the preset curve and the processing curve along the axial direction of the articulated piston; the groove is milled according to the feed depth; and the residual material in the groove and the bottom residual material are removed.

[0015] By adopting the above technical solution, when the depth of the groove does not reach the preset depth, the subsequent processing method of the groove will be determined by the bottom curvature of the groove, so that the processed groove still meets the design requirements.

[0016] Optionally, a first precision milling is performed on the inner wall of the groove by a ball-end tool; The inner wall of the groove is subjected to second precision milling by a ball-end tool to obtain an articulated piston, wherein the milling depth of the second precision milling is less than the milling depth of the first precision milling.

[0017] By adopting the above technical solution, the inner wall of the groove is precisely milled at least twice, which helps to gradually refine the processing to avoid excessive cutting burden and ensure the final quality of the groove.

[0018] Optionally, detecting the roughness of the inner wall of the groove; Determining a rough area of ​​the inner wall of the groove according to the roughness; According to the position of the rough area, the moving path is designed so that the moving path passes through the rough area and the moving path is the shortest; The inner wall of the groove is subjected to third precision milling according to the moving path by means of the ball end tool.

[0019] By adopting the above technical solution, the rough area of ​​the inner wall of the groove can be precisely milled to make the inner wall of the groove smooth enough. In addition, the moving path required for precision milling can be minimized to shorten the processing time and improve the processing efficiency.

[0020] In a second aspect, the present application provides an articulated piston processing system for a rotary compressor, which adopts the following technical solution: A system for machining an articulated piston of a rotary compressor, comprising: An acquisition module is used to acquire a feed direction, a feed point, a processing curve, a first straight line, a second straight line, a preset curve, a preset depth, a bottom curvature and a roughness; A memory for storing a program of any one of the above-mentioned methods for machining an articulated piston of a rotary compressor; The program in the processor and the memory can be loaded and executed by the processor to implement any of the above-mentioned methods for processing the articulated piston of the rotary compressor.

[0021] By adopting the above technical solution, 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 the residual material in the groove is removed; then, chamfers are milled on the openings 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 an articulated piston. Under the premise of ensuring the verticality of the groove, the process difficulty can be reduced and the dimensional accuracy of the articulated piston can be improved.

[0022] In a third aspect, the present application provides a smart terminal, which adopts the following technical solution: An intelligent terminal comprises a memory and a processor, wherein the memory stores a computer program which can be loaded by the processor and executes any one of the above-mentioned methods for processing an articulated piston of a rotary compressor.

[0023] By adopting the above technical solution, 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 the residual material in the groove is removed; then, chamfers are milled on the openings 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 an articulated piston. Under the premise of ensuring the verticality of the groove, the process difficulty can be reduced and the dimensional accuracy of the articulated piston can be improved.

[0024] In a fourth aspect, the present application provides a computer storage medium capable of storing a corresponding program, which is easy to reduce the process difficulty and improve the accuracy of the size of the articulated piston, and adopts the following technical solution: A computer-readable storage medium stores a computer program that can be loaded by a processor and execute any of the above-mentioned methods for machining an articulated piston of a rotary compressor.

[0025] By adopting the above technical solution, 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 the residual material in the groove is removed; then, chamfers are milled on the openings 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 an articulated piston. Under the premise of ensuring the verticality of the groove, the process difficulty can be reduced and the dimensional accuracy of the articulated piston can be improved.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. With the radial direction of the piston body as the cutting direction, the side wall of the piston body is milled to obtain a groove, and the residual material 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 to obtain an articulated piston. Under the premise of ensuring the verticality of the groove, the process difficulty can be reduced and the dimensional accuracy of the articulated piston can be improved; 2. During the groove machining process, the tool movement path will be detected to see if it passes through the center of the piston body to determine whether the tool movement path meets the requirements. If the tool feed direction does not meet the requirements, the milling process will be adjusted to ensure that the machined groove still meets the requirements. 3. When the depth of the groove does not reach the preset depth, the subsequent processing method of the groove will be determined by the bottom curvature of the groove, so that the processed groove still meets the design requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of a rotor compressor provided in an embodiment of the present application.

[0028] Figure 2 It is a schematic flow chart of a method for processing an articulated piston of a rotary compressor provided in an embodiment of the present application.

[0029] Figure 3 It is a schematic diagram of a method for processing an articulated piston of a rotary compressor provided in an embodiment of the present application.

[0030] Figure 4 It is a schematic diagram of a method for processing an articulated piston of a rotary compressor provided in an embodiment of the present application.

[0031] Figure 5 It is a schematic diagram of a method for processing an articulated piston of a rotary compressor provided in an embodiment of the present application.

[0032] Figure 6 It is a schematic diagram of a method for processing an articulated piston of a rotary compressor provided in an embodiment of the present application.

[0033] Figure 7It is a schematic diagram of a method for processing an articulated piston of a rotary compressor provided in an embodiment of the present application.

[0034] Figure 8 It is a schematic diagram of a method for processing an articulated piston of a rotary compressor provided in an embodiment of the present application.

[0035] Fig. 9 It is a schematic flow chart of a method for processing an articulated piston of a rotary compressor provided in an embodiment of the present application.

[0036] Fig.10 It is a schematic flow chart of a method for processing an articulated piston of a rotary compressor provided in an embodiment of the present application.

[0037] Fig.11 It is a schematic diagram of a method for processing an articulated piston of a rotary compressor provided in an embodiment of the present application.

[0038] Fig.12 It is a schematic flow chart of a method for processing an articulated piston of a rotary compressor provided in an embodiment of the present application.

[0039] Fig.13 It is a schematic diagram of a method for processing an articulated piston of a rotary compressor provided in an embodiment of the present application.

[0040] Fig.14 It is a schematic flow chart of a method for processing an articulated piston of a rotary compressor provided in an embodiment of the present application.

[0041] Fig.15 It is a schematic diagram of a method for processing an articulated piston of a rotary compressor provided in an embodiment of the present application.

[0042] Fig.16 It is a schematic flow chart of a method for processing an articulated piston of a rotary compressor provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of this application more clear, the following Figure 1-16 It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0044] The present application embodiment discloses a schematic diagram of a rotary compressor. Figure 1The rotary compressor includes an articulated piston 1, a vane 2 and a cylinder body 3. The cylinder body 3 is provided with an internal cavity and a vane groove connected to the internal cavity. The vane 2 is slidably arranged inside the vane groove, and one end of the vane 2 is hinged to the articulated piston 1. The articulated piston 1 is provided with a groove that penetrates along the axial direction. Furthermore, the hinged end of the vane 2 and the articulated piston 1 is spherical. Furthermore, the size of the groove is much smaller than the size of the articulated piston 1. The present application discloses a processing method for an articulated piston, especially a processing process for opening a groove on a piston body.

[0045] The present application embodiment discloses a method for processing an articulated piston of a rotary compressor. Figure 2 , the method comprising: Step S21: With the radial direction of the piston body as the cutting direction, the side wall of the piston body is milled to obtain a groove, the groove is U-shaped along the axial direction, the groove penetrates the piston body along the axial direction, and the piston body is cylindrical.

[0046] For example, please refer to Figure 3 The side wall of the piston body 31 is milled by a disc milling cutter with the radial direction of the piston body as the feed direction to obtain the groove 32.

[0047] Step S22: removing the residual material in the groove so that the bottom of the groove is in an arc shape along the axial direction.

[0048] The groove needs to be hinged with the slide, and the hinged end of the slide is spherical, so a shape corresponding to the hinged end of the slide needs to be generated inside the groove. In step S21, the groove is U-shaped, and the edge curve of its bottom along the axial direction is not arc-shaped, so it is necessary to remove the residual material in the groove so that the groove is arc-shaped 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.

[0049] For example, please refer to Figure 4 , remove the residual material portion 33 in the groove 32, so that the groove is in an arc shape along the axial direction.

[0050] Step S23: using a side milling tool to mill chamfers on both sides of the groove.

[0051] The openings on both sides of the groove refer to the openings of the piston body close to the side wall in the axial direction. For example, please refer to Figure 5 , chamfers 34 are milled out at the openings on both sides of the groove 32 .

[0052] The chamfer angle can be adjusted according to actual needs, and this application does not limit this.

[0053] Step S24: using a fine milling tool to perform axial layered milling on the inner wall of the groove to remove burrs on the inner wall of the groove.

[0054] After the chamfers are milled on both sides of the groove, burrs will be generated on the inner wall of the groove. In this step, the inner wall of the groove needs to be axially layered milled to remove these burrs and ensure the inner wall of the groove. For example, please refer to Figure 5 , Figure 6 and Figure 7 After the chamfers 34 are milled out on both sides of the groove 32, burrs 35 will be generated on the inner side of the chamfers. The inner wall of the groove 32 can be removed by axial layered milling.

[0055] Step S25: Using a ball-end tool, the inner wall of the groove is precisely milled to obtain an articulated piston.

[0056] Since the groove needs to be hinged with the slide, and the hinged end of the slide must be able to rotate in the groove, the inner wall of the groove needs to be smooth enough. Figure 8 The inner wall 36 of the groove 32 is precisely milled by a ball-end tool to make the inner wall 36 of the groove 32 as smooth as possible to obtain an articulated piston.

[0057] Optionally, the inner wall of the groove is subjected to first precision milling by a ball end tool, and the inner wall of the groove is subjected to second precision milling by a ball end tool to obtain an articulated piston, wherein the milling depth of the second precision milling is less than the milling depth of the first precision milling. Exemplarily, the milling depth of the first precision milling is 0.4 mm, and the milling depth of the second precision milling is 0.2 mm.

[0058] Furthermore, to ensure the accuracy of the first precision milling, the first precision milling may be repeated multiple times. For example, the first precision milling is performed twice on the inner wall of the groove at a milling depth of 0.4 mm.

[0059] In summary, the piston body's radial direction is used as the cutting direction, and the side wall of the piston body is milled to obtain a groove, and the residual material 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 to obtain an articulated piston. Under the premise of ensuring the verticality of the groove, the process difficulty can be reduced and the dimensional accuracy of the articulated piston can be improved.

[0060] In the following embodiments, during the milling process of the side wall of the piston body, the feed point or feed direction of the milling cutter may be wrong. In this embodiment, the size of the groove can be restored to normal by adjusting the milling process. The embodiment of the present application discloses a method for processing an articulated piston of a rotary compressor. Fig. 9 , the method comprising: Step S901: During the milling process of the side wall of the piston body, it is detected whether the tool movement path passes through the center of the piston body.

[0061] For details on milling the side wall of the piston body, please refer to Figure 2 Step S21 of the illustrated embodiment.

[0062] If the tool moving path passes through the center of the piston body, execute step S902; If the tool moving path does not pass through the center of the piston body, step S903 is executed.

[0063] The piston body is cylindrical, and the center of the piston body refers to the center of the piston body in the axial direction.

[0064] Optionally, the center coordinates of the piston body are determined according to the position of the piston body and the fixture for clamping the piston body; the feed direction and 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. Among them, when the milling process is performed on an intelligent lathe, the feed direction and feed point can be obtained through various sensors installed on the intelligent lathe.

[0065] Step S902: If yes, continue to perform milling on the side wall of the piston body.

[0066] If the tool movement path passes through the center of the piston body, it means that there is no abnormality in the milling process, which can ensure that the U-shaped groove has good verticality and meets the design requirements.

[0067] Step S903: If not, obtain the feed point and feed direction of the milling process.

[0068] If the tool movement path does not pass through the center of the piston body, it means that the milling process is abnormal. If the current milling process is continued, the verticality of the groove will be poor and cannot meet the design requirements.

[0069] In actual scenarios, the following situations may occur, causing the feed direction to not pass through the center of the piston body: 1. The feed direction is correct, but the feed point is wrong; 2. The feed direction is wrong, but the feed point is correct; 3. Both the feed direction and the feed point are wrong.

[0070] On the other hand, the applicant discovered that since 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 away due to the wrong feed direction, as long as this part of the material is the material that is to be removed in the step of milling the chamfers, the feed point and feed direction of the milling process can still be changed so that the final articulated piston meets the design requirements. Therefore, before this step, it is also necessary to determine whether the piston body at this time can still be salvaged. For this purpose, the embodiment of the present application discloses a method for machining an articulated piston of a rotary compressor. Referring to Fig.10 , the method comprising: Step S9031: Acquire the preset curve of the articulated piston in the axial direction and the processing curve of the piston body in the axial direction.

[0071] The preset curve refers to the edge curve of the groove of the articulated piston in the axial direction that meets the design requirements.

[0072] The processing 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.

[0073] Step S9032: Determine whether there is a preset curve, so that the processing curve is located inside the preset curve, and the processing curve has no intersection with the preset curve.

[0074] If there is a preset curve, so that the processing curve is located inside the preset curve, and the processing curve has no intersection with the preset curve, then execute step S9033; If there is no preset curve, the processing curve is located inside the preset curve, and the processing curve has no intersection with the preset curve, then step S9034 is executed.

[0075] For example, please refer to Fig.11 According to the size of the piston body, the preset curve 1101 and the processing curve 1102 are drawn on the circle corresponding to the side wall of the same piston body; each point on the preset curve 1101 is rotated around the center of the aforementioned circle at the same time; during the rotation process, it is determined whether the processing curve 1102 is located inside the preset curve 1101, and whether the processing curve 1102 has no intersection with the preset curve 1101. Fig.11 In the embodiment, when the preset curve 1101 is located at position A, the processing curve 1102 is located inside the preset curve 1101 and the processing curve 1102 has no intersection with the preset curve 1101.

[0076] Step S9033: If yes, execute the step of obtaining the feed point and feed direction of the milling process.

[0077] If there is a preset curve, it means that the feed depth of the milling process is shallow, and the groove of the piston body can still make the size of the final articulated piston meet the design requirements through the feed point and feed direction of the milling process.

[0078] Step S9034: If not, the piston body is discarded, and the feed point and feed direction of the milling process are updated.

[0079] If the preset curve does not exist, it means that the feed depth of the milling process is too deep, resulting in the groove on the piston body being too deep. The piston body cannot be processed into an articulated piston and needs to be discarded.

[0080] Optionally, the feed point and feed direction of the milling process 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.

[0081] In summary, in step S9031 to step S9034, when the feed direction is wrong, the preset curve and the processing curve are used to determine whether the piston body can be remedied so that the size of the piston body still meets the design requirements.

[0082] Step S904: adjusting the milling process according to the machining curve, feed point and feed direction of the piston body in the axial direction.

[0083] Exemplarily, a physical image of the piston body in the axial direction is acquired through a camera; and through the physical image, a machining curve of the groove of the piston body in the axial direction is identified.

[0084] Please refer to the following for details on adjusting milling processing. Fig.12 The embodiment shown.

[0085] To sum up, in the process of machining the groove, the tool movement path will be detected to see whether it passes through the center of the piston body to determine whether the tool movement path meets the requirements. When the feed direction does not meet the requirements, the milling process will be adjusted so that the machined groove still meets the requirements.

[0086] In the following embodiment, when an abnormal situation occurs during milling, if the cutting depth of the milling is relatively shallow, there is still room for remediation in the milling. For this purpose, the application embodiment discloses a method for processing an articulated piston of a rotary compressor. Fig.12 , the method comprising: Step S1201: setting a first straight line and a second straight line according to the processing curve, both of which pass through the center of the piston body, the first straight line intersects with the processing curve, and the second straight line passes through the intersection of the processing curve and the side wall of the piston body.

[0087] The second straight line passes only through the intersection of the machining curve and the side wall of the piston body, and the second straight line does not pass through any point on the machining curve other than the aforementioned intersection.

[0088] For example, please refer to Fig.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 processing curve 1301, the second straight line 1303 passes through the intersection of the processing curve 1301 and the side wall of the piston body, and the second straight line 1302 does not pass through other points on the processing curve 1301.

[0089] Step S1202: Obtain the angle bisector of the acute angle formed by the first straight line and the second straight line.

[0090] For example, please refer to Fig.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. The angle bisector of angle α is obtained as straight line OA, wherein the angle bisector OA and the side wall of the piston body are compared with point A and point B. Point A is the intersection point close to the processing curve 1301, and point B is the intersection point far away from the processing curve 1301.

[0091] Step S1203: Update the cutting point with the intersection of the angle bisector and the side wall of the piston body.

[0092] Optionally, two intersection points of the angle bisector and the side wall of the piston body are obtained, and the intersection point close to the machining curve is taken as the updated feed point.

[0093] For example, please refer to Fig.13 , with point A as the updated feed point.

[0094] Step S1204: Update the cutting direction using the angle bisector.

[0095] For example, please refer to Fig.13 , using ray AO as the updated cutting direction.

[0096] Step S1205: milling the side wall of the piston body according to the updated feed point and the updated feed direction.

[0097] exist Fig. 9 On the basis of the shown embodiment, although the milling process is abnormal, due to the existence of the chamfer, the groove still has room for remedy. The side wall of the piston body can be milled according to the updated feed point and the updated feed direction to ensure that the final processed articulated piston still meets the design requirements.

[0098] In summary, the feed point and feed direction are updated by the bisector of the acute angle between 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 feed direction, so that the groove after milling still meets the design requirements.

[0099] In the following embodiment, after the side wall of the piston body is milled to obtain a U-shaped groove, it is also possible to detect whether the depth of the groove meets the requirements, and determine the subsequent operation steps according to the actual depth of the groove. The present application embodiment discloses a method for processing an articulated piston of a rotary compressor. Fig.14 , the method comprising: Step S1401: Determine whether the depth of the groove reaches a preset depth.

[0100] The preset depth is a preset constant. The preset depth is related to the design requirements of the articulated piston.

[0101] If the depth of the groove reaches the preset depth, step S1402 is executed; If the depth of the groove does not reach the preset depth, step S1403 to step S1407 are executed.

[0102] Exemplarily, a physical image of the piston body in the axial direction is acquired by a camera; and the depth of the groove is identified by the physical image.

[0103] Step S1402: If yes, then execute the step of removing the residual material in the groove.

[0104] When the depth of the groove reaches the preset depth, it means that the depth of the groove has met the design requirements and the subsequent steps can be continued.

[0105] Step S1403: If not, obtain the bottom curvature of the groove.

[0106] When the depth of the groove does not reach the preset depth, it means that the depth of the groove does not meet the design requirements, the depth of the groove is shallow, and the depth of the groove needs to be adjusted. In the actual production process, the groove does not reach the preset depth due to the wear of the milling cutter or the position offset of the milling cutter. Therefore, it is necessary to obtain the bottom curvature of the groove to determine whether the milling cutter is worn. If the bottom curvature is the same as the preset curvature, it means 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 due to the position offset of the milling cutter. If the bottom curvature is greater than or less than the preset curvature, it means 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 due to the wear of the milling cutter.

[0107] The bottom curvature refers to the curvature of 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.

[0108] Exemplarily, a physical image of the piston body in the axial direction is obtained through a camera; a processing curve of the groove of the piston body in the axial direction is identified through the physical image; and a bottom curvature of the groove is obtained based on the aforementioned processing curve.

[0109] Step S1404: When the bottom curvature is greater than the preset curvature, continue milling the groove until the depth of the groove reaches the preset depth.

[0110] The preset curvature is 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 requirements of the articulated piston.

[0111] Optionally, the difference between the depth of the groove and the preset depth is calculated; the aforementioned feed depth is updated using the sum of the difference and the feed depth of the milling process; and the groove is milled according to the updated feed depth so that the depth of the groove reaches the preset depth.

[0112] For example, please refer to Fig.15 When the bottom curvature is greater than the preset curvature, the groove is further milled until the depth of the groove reaches the preset depth, thereby obtaining the groove 1501. 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 in the groove 1501 is required after this step, although the two grooves are different in shape, the redundant part of the groove 1501 compared with the groove 1502 can be removed by removing the residual material in the groove 1501, which has no effect on the subsequent steps and will not affect the size of the articulated piston.

[0113] It should be noted that steps S1404 to S1407 are only temporary relief measures to ensure that when the depth of the groove of the current piston body is insufficient, an articulated piston that meets the design requirements can still be made.

[0114] Step S1405: When the bottom curvature is less than the preset curvature, the feed depth is set according to the preset curve and the processing curve along the axial direction of the articulated piston.

[0115] Optionally, based on the preset curve and the processing curve along the axial direction of the articulated piston, a moving distance required to move the processing curve when the preset curve intersects the processing curve is determined; and the moving distance is used as the feed depth.

[0116] For example, please refer to Fig.15 , let the preset curve intersect with the processing curve, determine the required moving distance of the preset curve is L, and then the feed depth is also L.

[0117] Step S1406: milling the groove according to the feed depth.

[0118] For example, please refer to Fig.15 , the groove is milled according to the feed depth to obtain the groove.

[0119] Step S1407: removing the residual material in the groove and the residual material at the bottom.

[0120] For example, please refer to Fig.15 , when the bottom curvature is less than the preset curvature, if the groove is continuously milled in accordance with step S1404 until the depth of the groove reaches the preset depth, too much material at the bottom of the groove will be milled out, causing the actual size of the articulated piston to seriously deviate from the design requirements. Therefore, this step needs to consider the feed depth of the milling process so that the preset curve intersects with the processing curve to obtain the groove 1503. However, this will result in residual material that has not been removed at the bottom of the groove 1503. Therefore, when removing the residual material part in the groove 1503, the residual material at the bottom of the groove 1503 can be removed at the same time.

[0121] In summary, when the depth of the groove does not reach the preset depth, the subsequent processing method of the groove will be determined by the bottom curvature of the groove, so that the processed groove still meets the design requirements.

[0122] In the following embodiment, after the inner wall of the groove is precisely milled by a ball-end tool, 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, these areas can be precisely milled again to ensure that the inner wall is smooth everywhere. The embodiment of the present application discloses a method for processing an articulated piston of a rotary compressor. Fig.16 , the method comprising: Step S1601: Detect the roughness of the inner wall of the groove.

[0123] Optionally, a roughness meter is used to detect the inner wall of the groove to obtain the roughness.

[0124] Optionally, an inner wall image of the groove is acquired through a camera; texture features of the inner wall image are extracted; and the texture features are quantified to obtain the roughness.

[0125] Step S1602: determining the rough area of ​​the inner wall of the groove according to the roughness.

[0126] Optionally, a region of the inner wall of the groove whose roughness is greater than a preset roughness is determined as a rough region. The preset roughness is a preset constant.

[0127] 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 is the shortest.

[0128] Optionally, a candidate moving path passing through the rough area is generated through 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 for this step.

[0129] Optionally, a path planning model is called to perform path planning on the position of the rough area to obtain a moving path. The path planning model adopts a graph model, a dynamic programming algorithm or a heuristic algorithm.

[0130] Step S1604: Using the ball-end tool, perform third precision milling on the inner wall of the groove according to the moving path.

[0131] Exemplarily, the inner wall of the groove is precision milled by a ball-end tool according to the moving path, so that the rough area becomes smooth.

[0132] In summary, the rough area of ​​the inner wall of the groove can be precisely milled to make the inner wall of the groove smooth enough. In addition, the moving path required for precision milling can be minimized to shorten the processing time and improve the processing efficiency.

[0133] Based on the same inventive concept, the embodiment of the present application provides an articulated piston processing system for a rotary compressor, comprising: An acquisition module is used to acquire a feed direction, a feed point, a processing curve, a first straight line, a second straight line, a preset curve, a preset depth, a bottom curvature and a roughness; A memory for storing a program of any one of the above-mentioned methods for machining an articulated piston of a rotary compressor; The program in the processor and the memory can be loaded and executed by the processor to implement any of the above-mentioned methods for processing the articulated piston of the rotary compressor.

[0134] In summary, the piston body's radial direction is used as the cutting direction, and the side wall of the piston body is milled to obtain a groove, and the residual material 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 to obtain an articulated piston. Under the premise of ensuring the verticality of the groove, the process difficulty can be reduced and the dimensional accuracy of the articulated piston can be improved.

[0135] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, 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 aforementioned method embodiment, and will not be repeated here.

[0136] An embodiment of the present application provides a computer-readable storage medium storing a computer program that can be loaded and executed by a processor for a method for processing an articulated piston of a rotary compressor.

[0137] Computer storage media include, for example, various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks or optical disks.

[0138] Based on the same inventive concept, an embodiment of the present application provides an intelligent terminal, including a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executed by a method for processing an articulated piston of a rotary compressor.

[0139] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, 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 aforementioned method embodiment, and will not be repeated here.

[0140] The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Any feature disclosed in this specification (including the abstract and drawings), unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

Claims

1. A method for processing an articulated piston of a rotary compressor, It is characterized in that The method comprises: Taking the radial direction of the piston body as the cutting direction, the side wall of the piston body is milled to obtain a groove, wherein the groove is U-shaped along the axial direction and penetrates the piston body along the axial direction, and the piston body is cylindrical; Removing the residual material in the groove so that the bottom of the groove is in an arc shape along the axial direction; Using a side milling tool, milling chamfers at both side openings of the groove; Using a fine milling tool, the inner wall of the groove is subjected to axial layered milling processing to remove burrs on the inner wall of the groove; The inner wall of the groove is precisely milled by a ball-end tool to obtain an articulated piston.

2. The method for processing an articulated piston of a rotary compressor according to claim 1, It is characterized in that The method further comprises: During the milling process of the side wall of the piston body, detecting whether the tool movement path passes through the center of the piston body; If yes, continue to perform milling on the side wall of the piston body; If not, the feed point and feed direction of the milling process are obtained; The milling process is adjusted according to the machining curve, feed point and feed direction of the piston body in the axial direction.

3. The method for processing an articulated piston of a rotary compressor according to claim 2, It is characterized in that The adjusting the milling process according to the connection direction and the feed point comprises: A first straight line and a second straight line are set according to the processing curve, wherein the first straight line and the second straight line both pass through the center of the piston body, the first straight line intersects with the processing curve, and the second straight line passes through the intersection of the processing 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 cutting point with the intersection of the angle bisector and the side wall of the piston body; Updating the cutting direction with the angle bisector; The side wall of the piston body is milled according to the updated feed point and the updated feed direction.

4. The method for processing an articulated piston of a rotary compressor according to claim 2, It is characterized in that The method further comprises: Acquire a preset curve of the articulated piston in the axial direction and a processing curve of the piston body in the axial direction; Determine whether the preset curve exists, so that the processing curve is located inside the preset curve, and the processing curve has no intersection with the preset curve; If yes, then the step of obtaining the feed point and feed direction of the milling process is performed; If not, the piston body is discarded, and the feed point and feed direction of the milling process are updated.

5. The method for processing an articulated piston of a rotary compressor according to claim 1, It is characterized in that After the step of milling the side wall of the piston body with the radial direction of the piston body as the feed direction to obtain the groove, the method further includes: Determining whether the depth of the groove reaches a preset depth; If yes, then the step of removing the residual material in the groove is performed; If not, obtaining the bottom curvature of the groove; When the bottom curvature is greater than the preset curvature, the groove is continuously milled until the depth of the groove reaches the preset depth; When the bottom curvature is smaller than the preset curvature, the feed depth is set according to the preset curve and the processing curve along the axial direction of the articulated piston; the groove is milled according to the feed depth; and the residual material portion and the bottom residual material in the groove are removed.

6. The method for processing an articulated piston of a rotary compressor according to claim 1, It is characterized in that The method further comprises: Performing first precision milling on the inner wall of the groove by using the ball-end tool; The inner wall of the groove is subjected to second precision milling by the ball end tool to obtain the articulated piston, wherein the milling depth of the second precision milling is less than the milling depth of the first precision milling.

7. The method for processing an articulated piston of a rotary compressor according to claim 6, It is characterized in that The method comprises: Detecting the roughness of the inner wall of the groove; determining a rough area of ​​an inner wall of the groove according to the roughness; According to the position of the rough area, designing a moving path so that the moving path passes through the rough area and the moving path is the shortest; The inner wall of the groove is subjected to third precision milling by the ball end tool according to the moving path.

8. An articulated piston processing system for a rotary compressor, It is characterized in that The system comprises: An acquisition module is used to acquire a feed direction, a feed point, a processing curve, a first straight line, a second straight line, a preset curve, a preset depth, a bottom curvature and a roughness; A memory for storing a program of a method for machining an articulated piston of a rotary compressor according to any one of claims 1 to 7; The program in the memory can be loaded and executed by the processor to implement the method for machining an articulated piston of a rotary compressor as claimed in any one of claims 1 to 7.

9. A smart terminal, It is characterized in that The invention comprises a memory and a processor, wherein the memory stores a computer program which can be loaded by the processor and executes a method for machining an articulated piston of a rotary compressor as claimed in any one of claims 1 to 7.

10. A computer-readable storage medium, It is characterized in that The computer program is stored which can be loaded by a processor and execute the method for machining an articulated piston of a rotary compressor according to any one of claims 1 to 7.

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