A method of manufacturing a compressor vane

Abstract

The application provides a manufacturing method of a compressor sliding vane, which has a sliding surface slidingly connected with a cylinder body of a compressor and a hinged shaft hinged with a compressor piston, and is used for realizing eccentric rotation of the compressor piston and a crankshaft and air compression, and the manufacturing method comprises the following steps: performing cold-drawing treatment on raw materials through a die hole to form a flat material structure; grinding the flat material structure to correct thickness and width of the flat material structure; respectively performing cutting processing on two flat surfaces of the flat material structure to respectively obtain a half integrated clamping groove and an integrated hinged shaft; cutting along a length direction of the flat material structure according to a predetermined sliding vane length to obtain a sliding vane body with the clamping groove and the hinged shaft; and performing finishing processing on a surface of the sliding vane body to obtain the compressor sliding vane. The application solves the problems of size instability and precision influence caused by multiple cold-drawing of the sliding vane using a single cold-drawing process and high die cost.

Description

Technical Field

[0001] This invention relates to the field of compressor vane technology, and more specifically, to a method for manufacturing compressor vanes. Background Technology

[0002] The compressor vane is one of the core components of a rotary compressor, and its performance directly affects the compressor's compression efficiency, operational stability, and service life. The compressor vane is slidably connected to the compressor cylinder body, and its end is hinged to the compressor piston. Through the cooperation of the hinge shaft and the piston, the piston and crankshaft can rotate eccentrically, thereby completing the air compression process.

[0003] The existing manufacturing method for compressor vanes uses a single drawing process, which directly processes the raw material into compressor vanes through multiple drawing operations. This results in high requirements for material shaping. After multiple cold drawing operations, residual stress exists in the raw material of the vane, causing instability in dimensions such as thickness and width. Subsequent machining allowances are uneven, affecting accuracy. In addition, multiple cold drawing operations require more molds, which need to have high surface finish and wear resistance. The increase in the types and number of molds leads to increased manufacturing and replacement costs. Summary of the Invention

[0004] The problem solved by this invention is that the sliding plate requires multiple cold drawing processes when using a single cold drawing process, which leads to dimensional instability, affects accuracy, and results in high mold costs.

[0005] To address the aforementioned problems, this invention provides a method for manufacturing a compressor vane. The compressor vane has a sliding surface that slides in connection with the compressor cylinder body, and a hinge shaft that hinges to the compressor piston, enabling eccentric rotation of the compressor piston and crankshaft to compress air. The manufacturing method includes: cold-drawing raw materials through a mold hole to form a flat structure; grinding the flat structure to correct its thickness and width; machining the two flat surfaces of the flat structure to obtain an integral snap-fit ​​groove and an integral hinge shaft on each side; cutting along the length of the flat structure to a predetermined vane length to obtain a vane body with a snap-fit ​​groove and a hinge shaft; and finishing the surface of the vane body to obtain the compressor vane.

[0006] The technical effects achieved by adopting this solution are as follows: raw materials can be processed into flat structures with fewer cold drawing cycles, quickly approaching the cross-sectional dimensions of compressor vanes. This avoids the impact of excessive cold drawing cycles on the accuracy of cross-sectional dimensions and saves on molds used in subsequent cold drawing processes. Since the mold holes in subsequent cold drawing processes are close to the cross-sectional shape of compressor vanes, they have poor compatibility and are easily damaged. Therefore, eliminating these molds further reduces costs. The molds used to process flat structures in the earlier cold drawing processes have simpler mold hole structures, higher compatibility, and are easier to reuse.

[0007] After the thickness and width of the flat structure are ground, it has higher positioning accuracy, which facilitates further surface cutting to process an integrated snap-fit ​​groove and an integrated hinge shaft.

[0008] The integrated snap-fit ​​groove and integrated hinge shaft are machined using cutting technology. On the one hand, there is no need for molds, the tool compatibility is better and the cost is lower. On the other hand, the integrated snap-fit ​​groove and integrated hinge shaft are machined using the same datum, avoiding assembly errors caused by separate machining. Furthermore, the snap-fit ​​groove and hinge shaft formed by subsequent cutting also have higher precision and consistency.

[0009] Furthermore, the mold hole includes a flat hole, wherein at least one of the two flat ends of the flat hole is a straight edge; the step of cold drawing the raw material through the mold hole to form a flat structure specifically includes: cold drawing the raw material through the mold hole to form a flat structure having two opposing flat surfaces and at least one flat side surface.

[0010] The technical effects achieved by adopting this solution are as follows: The flat hole is used to cold-draw the raw material into a flat structure, and the straight edge of the flat hole forms the flat side surface of the structure. The side surface of the flat structure is initially positioned using tooling, facilitating grinding. After surface grinding, precise positioning can be achieved using tooling, facilitating machining. Simultaneously, the die hole with the straight edge structure reduces material deformation during cold drawing, ensuring the uniformity of the flat structure's cross-sectional dimensions and providing a precise blank base for subsequent grinding correction and machining.

[0011] Furthermore, the raw material passes through at least two mold holes and undergoes at least two cold drawing processes to form two opposing flat sides; the flat structure is ground, specifically including grinding the flat sides and the flat surface of the flat structure; before cutting the flat surface on either side of the flat structure, the manufacturing method further includes: mounting the flat structure onto a fixture and clamping the two opposing flat sides.

[0012] The technical effects achieved by adopting this technical solution are as follows: cold drawing forms flat sides on both sides, the parallelism and flatness errors of the flat sides on both sides are greatly reduced, and the clamping can be more stable, avoiding processing errors caused by misalignment or tilting, and improving the positional accuracy of the snap-fit ​​groove and the hinge shaft.

[0013] Furthermore, the step of machining the two flat surfaces of the flat material structure to obtain half of the integrated snap-fit ​​groove and integrated hinge shaft specifically includes: planing and / or milling the two flat surfaces of the flat material structure to obtain half of the integrated snap-fit ​​groove and integrated hinge shaft.

[0014] The technical effects achieved by adopting this technical solution are as follows: the integrated snap-fit ​​groove and the integrated hinge shaft extend along the length of the flat material structure, and both planing and milling can be performed in a straight line, achieving precise machining of the integrated snap-fit ​​groove and the integrated hinge shaft; while milling has higher machining efficiency and accuracy; and planing has lower equipment costs.

[0015] Furthermore, the step of machining the two flat surfaces of the flat material structure to obtain an integral snap-fit ​​groove and an integral hinge shaft on one side specifically includes: using a forming tool to simultaneously machine the first snap-fit ​​groove on one side of the flat material structure and the first curved surface of the hinge shaft on the same side; and using the middle plane of the flat material structure as a reference to mirror machine the second snap-fit ​​groove on the other side and the second curved surface of the hinge shaft.

[0016] The technical effects achieved by adopting this technical solution are as follows: using a forming tool to process the first curved surface and the first locking groove in one operation can effectively improve the relative positional accuracy of the two and ensure the structural consistency of the connecting part; using mirror machining, with the middle plane of the flat material as the reference, ensures the symmetry between the first locking groove and the second locking groove, and between the first curved surface and the second curved surface, avoiding the problem of ineffective cooperation between the hinge shaft and the piston and uneven gap caused by the positioning deviation between the two, and improving the consistency of the swing state on both sides when the piston rotates eccentrically.

[0017] Furthermore, the manufacturing method further includes: inspecting the symmetry of the first snap-fit ​​groove and the second snap-fit ​​groove; and / or, inspecting the roundness of the first curved surface and the second curved surface.

[0018] The technical effects achieved by adopting this solution are as follows: Adding symmetry and roundness inspection steps can promptly detect dimensional deviations generated during the machining of the integrated hinge shaft, preventing substandard hinge shaft blanks from flowing into subsequent assembly processes and damaging the piston; symmetry inspection ensures the symmetry accuracy of the two side locking grooves and the curved surface of the hinge shaft, guaranteeing the compatibility between the compressor vanes and the piston; roundness inspection ensures the smoothness of the curved surface of the hinge shaft, reducing wear during its hinged fit with the piston and improving the operational stability of the compressor.

[0019] Furthermore, the diameter of the hinge shaft is 3mm to 5mm, and the depth of the snap-fit ​​groove is 0.3mm to 1.5mm; the cutting and machining of the two flat surfaces of the flat material structure to obtain half of the integrated snap-fit ​​groove and integrated hinge shaft specifically includes: rough machining the snap-fit ​​groove on both flat surfaces of the flat material structure, leaving a snap-fit ​​groove allowance of 0.2mm to 0.3mm, and then fine machining the snap-fit ​​groove; rough machining the hinge shaft on both flat surfaces, leaving a hinge shaft allowance of 0.1mm to 0.3mm, and then fine machining the hinge shaft.

[0020] The technical effects achieved by adopting this technical solution are as follows: rough machining of the snap-fit ​​groove and the hinge shaft can quickly remove excess material, improve processing efficiency, and the reasonable machining allowance can effectively offset the deformation caused by rough machining, providing a stable foundation for the fine machining of the snap-fit ​​groove and the hinge shaft; the fine machining ensures the high precision of the integrated snap-fit ​​groove and the integrated hinge shaft, and keeps the errors of the hinge shaft diameter and the depth of the snap-fit ​​groove 131 within a reasonable range.

[0021] Furthermore, the surface of the vane body is finished to obtain the compressor vane, specifically including: rough grinding and at least one grinding of the initial sliding surface of the vane body to obtain the sliding surface of the compressor vane; rough grinding and fine grinding of the initial end face of the vane body to obtain the end face of the compressor vane; fine grinding of the initial hinge shaft of the vane body to obtain the hinge shaft of the compressor vane; and nitriding treatment of the vane body.

[0022] The technical effects achieved by adopting this solution are as follows: The initial sliding surface, after rough grinding and at least one grinding cycle, effectively reduces roughness, making the movement between the sliding surface and the compressor cylinder body smoother; the initial end face makes axial contact with the compressor cylinder, preventing the compressor vane from moving axially; rough grinding and fine grinding effectively reduce wear between the end face and the compressor cylinder; the initial hinge shaft is directly fine-ground, removing a small amount of material from its surface, effectively reducing friction, noise, and vibration during hinge movement. Nitriding treatment of the vane body forms a hard nitrided layer on the surface of the vane body, significantly enhancing surface hardness, wear resistance, and corrosion resistance, extending the service life of the compressor vane.

[0023] Furthermore, the raw material is coiled steel or bar steel with a circular cross-section.

[0024] The technical effects achieved by adopting this technical solution are: the circular cross-section coiled or bar steel is subjected to uniform stress during the cold drawing process, which can reduce the deformation of the billet and ensure the dimensional uniformity of the flat structure after cold drawing.

[0025] Furthermore, the step of cutting along the length of the flat material structure to obtain a slider body with a locking groove and a hinge shaft specifically includes: cutting the flat material structure along the length of the flat material structure according to the target length of the slider body and the reserved finishing allowance; soft grinding the axial end faces of the slider body obtained after cutting; and heat treating the slider body.

[0026] The technical effects achieved by adopting this solution are as follows: Allowance for finishing processes is reserved to avoid cutting errors affecting the dimensional accuracy of the finished product, providing space for dimensional adjustments in subsequent finishing processes; soft grinding can quickly remove burrs and oxide scale from the cut end face, improving the flatness of the end face and providing a better positioning reference; the heat treatment process can improve the overall hardness and strength of the vane body, enhancing its mechanical properties and meeting the stress requirements of the compressor vane during compressor operation; equidistant cutting ensures the consistency of the dimensions of each vane body.

[0027] In summary, the above-mentioned technical solutions of this application can have one or more of the following advantages or beneficial effects: I) Raw materials can be processed into flat structures with fewer cold drawing cycles, quickly approaching the cross-sectional dimensions of compressor vanes. This avoids the impact of excessive cold drawing cycles on the accuracy of cross-sectional dimensions and saves on mold costs in subsequent cold drawing processes. Furthermore, the molds used for processing the flat structures in the earlier cold drawing processes have simple mold hole structures, higher adaptability, and are easy to reuse; II) The integrated snap-fit ​​groove and integrated hinge shaft are processed using cutting technology. This eliminates the need for molds, improves tool adaptability, and reduces costs. Additionally, the integrated snap-fit ​​groove and integrated hinge shaft... The hinge shaft is machined using the same datum, avoiding assembly errors caused by separate machining. Furthermore, the snap-fit ​​groove and hinge shaft formed by subsequent cutting also have higher precision and consistency. III) The mold hole with straight edge structure can reduce the amount of material deformation during cold drawing, ensuring the uniformity of the cross-sectional dimensions of the flat material structure, and providing a precise blank base for subsequent grinding correction and cutting. IV) Mirror machining with the middle plane of the flat material as the datum ensures the symmetry between the first snap-fit ​​groove and the second snap-fit ​​groove, and between the first curved surface and the second curved surface. This avoids the problem of ineffective cooperation between the hinge shaft and the piston and uneven gap caused by the positioning deviation between the two, and improves the consistency of the swing state on both sides when the piston rotates eccentrically. Attached Figure Description

[0028] Figure 1A flowchart illustrating a method for manufacturing a compressor vane according to the present invention;

[0029] Figure 2 for Figure 1 Schematic diagram of the structural changes of the sliding vanes in the compressor;

[0030] Figure 3 for Figure 2 Another structural diagram of the medium flat bar structure;

[0031] Figure 4 for Figure 2 Another structural schematic diagram of the sliding vane of the compressor;

[0032] Figure 5 This is a schematic diagram of the spring groove.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100 - Raw material; 110 - Flat structure; 111 - Flat side; 112 - Flat surface; 120 - Sliding vane body; 130 - Compressor sliding vane; 131 - Snap-fit ​​groove; 132 - Hinge shaft; 133 - Spring groove. Detailed Implementation

[0035] The purpose of this invention is to provide a method for manufacturing compressor vanes, which combines cold drawing and cutting to achieve lower material deformation, higher precision, and lower equipment costs.

[0036] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0037] See Figures 1-5 This invention provides a method for manufacturing a compressor vane 130. The compressor vane 130 has a sliding surface that is slidably connected to the compressor cylinder body, and a hinge shaft 132 that is hinged to the compressor piston, for realizing eccentric rotation of the compressor piston and crankshaft to achieve air compression. The manufacturing method includes:

[0038] Step S1: The raw material 100 is cold-drawn through the die hole to form a flat structure 110;

[0039] Step S2: Grind the flat structure 110 to correct the thickness and width of the flat structure 110;

[0040] Step S3: The two flat surfaces 112 of the flat structure 110 are cut to obtain half of the integrated snap-fit ​​groove and the integrated hinge shaft respectively.

[0041] Step S4: Cut along the length of the flat structure 110 according to the predetermined slide length to obtain a slide body 120 with a snap-fit ​​groove 131 and a hinge shaft 132;

[0042] Step S5: The surface of the vane body 120 is finished to obtain the compressor vane 130.

[0043] In this embodiment, the raw material 100 can be processed into a flat structure 110 with fewer cold drawing cycles, quickly approaching the cross-sectional dimensions of the compressor vane 130. This avoids the impact of excessive cold drawing cycles on the accuracy of the cross-sectional dimensions and saves on the molds used in subsequent cold drawing processes. Since the mold holes in subsequent cold drawing processes are close to the cross-sectional shape of the compressor vane 130, they have poor compatibility and are easily damaged. Therefore, eliminating these molds further reduces costs. The molds used to process the flat structure 110 in the previous cold drawing processes have simple mold hole structures, higher compatibility, and are easy to reuse.

[0044] The flat structure 110, after being ground in thickness and width, has higher positioning accuracy and facilitates surface cutting in a specific embodiment to process an integral snap-fit ​​groove and an integral hinge shaft.

[0045] The integrated snap-fit ​​groove and the integrated hinge shaft are machined by cutting process. On the one hand, there is no need for molds, the tool compatibility is better and the cost is lower. On the other hand, the integrated snap-fit ​​groove and the integrated hinge shaft are machined using the same datum, avoiding assembly errors caused by separate machining. Furthermore, the snap-fit ​​groove 131 and the hinge shaft 132 formed by subsequent cutting also have higher precision and consistency.

[0046] In one specific embodiment, combined with Figures 2-3 The mold hole includes: a flat hole, at least one of the two flat ends of the flat hole is a straight edge; the raw material 100 is cold-drawn through the mold hole to form a flat structure 110, specifically including: the raw material 100 is cold-drawn through the mold hole to form a flat structure 110 having two opposing flat surfaces 112 and at least one flat side surface 111.

[0047] It should be noted that the flat hole is used to cold draw the raw material 100 into a flat structure, and the straight edge of the flat hole is used to form the flat side 111 of the flat structure. The side of the flat structure is initially positioned by tooling, which facilitates grinding. After surface grinding, precise positioning can be achieved by tooling, which facilitates cutting. At the same time, the die hole of the straight edge structure can reduce the amount of material deformation during cold drawing, ensure the uniformity of the cross-sectional dimensions of the flat structure 110, and provide a precise blank base for subsequent grinding correction and cutting.

[0048] In one specific embodiment, the raw material 100 passes through at least two mold holes and is cold-drawn at least twice to form two opposing flat sides 111.

[0049] The flat structure 110 is ground, specifically including grinding the flat side 111 and flat surface 112 of the flat structure 110. For example, the flat structure 110 is ground using a grinding wheel with a grit size of 80-100 mesh, so that the parallelism error of the two flat surfaces 112 of the flat structure 110 after grinding is ≤0.02mm / m and the surface roughness Ra is ≤1.6μm.

[0050] Before machining either side of the flat surface 112 of the flat structure 110, the manufacturing method further includes: mounting the flat structure 110 onto a fixture and clamping the two opposing flat sides 111.

[0051] It should be noted that cold drawing forms two flat side surfaces 111, which significantly reduces the parallelism and flatness errors of the two flat side surfaces 111. Furthermore, the clamps can be used to clamp more stably, avoiding processing errors caused by misalignment or tilting, and improving the positional accuracy of the snap-fit ​​groove 131 and the hinge shaft 132.

[0052] Preferably, the thickness of raw material 100 decreases once every time it is cold-drawn through the mold hole.

[0053] Preferably, the end of the raw material 100 used to process the flat side 111 is cold-drawn through the mold hole each time, and the curvature of its protruding arc surface is reduced. During the last cold drawing, it is cold-drawn into the flat side 111 after passing through a flat hole with a straight edge.

[0054] In one specific embodiment, the raw material 100 is a coiled steel or a bar steel with a circular cross-section.

[0055] It should be noted that circular cross-section coiled or bar steel is subjected to uniform stress during cold drawing, which can reduce billet deformation and ensure the dimensional uniformity of the flat structure 110 after cold drawing.

[0056] For example, the raw material 100 has a diameter of 15 mm to 30 mm. After at least one cold drawing, it forms two opposing flat surfaces 112 and at least one small arc surface for forming a flat side surface 111. Its width increases to 20 mm to 42 mm, and its thickness decreases to 3 mm to 7 mm. Further, after the raw material 100 is cold-drawn on at least one side, the thickness between the two opposing flat surfaces 112 is further reduced to 2.8 mm to 6 mm, and the width of the raw material 100 is further reduced to 18 mm to 40 mm.

[0057] If the number of flat side 111 is 1, then the end of the raw material 100 that is not used to form the flat side 111 is cold-drawn to form a large arc surface, wherein the arc of the small arc surface is a, the arc of the large arc surface is b, and a < b ≤ π.

[0058] In one specific embodiment, after each cold drawing, the raw material 100 is annealed to improve its hardness and strength and improve its machinability. The annealing temperature is 700-800℃, and the material is held at the annealing temperature for 2-3 hours to avoid excessive hardening.

[0059] In one specific embodiment, the two flat surfaces 112 of the flat structure 110 are respectively machined to obtain half of the integrated snap-fit ​​groove and the integrated hinge shaft. Specifically, the two flat surfaces 112 of the flat structure 110 are respectively planed and / or milled to obtain half of the integrated snap-fit ​​groove and the integrated hinge shaft.

[0060] It should be noted that the integrated snap-fit ​​groove and the integrated hinge shaft extend along the length of the flat structure 110. Both planing and milling can be used for straight cutting to achieve precise machining of the integrated snap-fit ​​groove and the integrated hinge shaft. Milling has higher machining efficiency and accuracy, while planing has lower equipment costs.

[0061] In one specific embodiment, the two flat surfaces 112 of the flat structure 110 are respectively machined to obtain a half-integrated snap-fit ​​groove and an integrated hinge shaft. Specifically, the machining process includes: using a forming tool to simultaneously machine the first snap-fit ​​groove on one side of the flat surface 112 of the flat structure 110 and the first curved surface of the hinge shaft 132 on the same side; and mirroring the other side with the middle plane of the flat structure 110 as a reference to machine the second snap-fit ​​groove and the second curved surface of the hinge shaft 132.

[0062] It should be noted that the forming tool has a cutting edge that matches the shape of the locking groove 131 and the hinge shaft 132. Using the forming tool to process the first curved surface and the first locking groove in one operation can effectively improve the relative positional accuracy of the two and ensure the structural consistency of the connecting part. The mirror machining method, with the middle plane of the flat material as the reference, ensures the symmetry between the first locking groove and the second locking groove, and between the first curved surface and the second curved surface. This avoids the problem of the hinge shaft 132 and the piston not being able to cooperate effectively and the gap being uneven due to the positioning deviation between the two, and improves the consistency of the swing state on both sides when the piston rotates eccentrically.

[0063] Preferably, during the cutting process, the flat side 111 is installed and clamped to the fixture, and the parallelism error of the positioning surfaces on both sides of the fixture is ≤0.01mm, to ensure that the machining allowance on both sides is uniform.

[0064] Furthermore, when planing the two flat surfaces 112 of the flat structure 110, a flat-jaw pliers are used to clamp the flat structure 110, and a dial indicator is used to calibrate the clamping accuracy. A carbide planer is used to machine the first and second locking grooves, and a forming planer is used to machine the first and second curved surfaces of the integrated hinge shaft. When machining the first locking groove and the first curved surface on one side, the first locking groove is rough planed and then finish planed in sequence. Then, with the end face of the first locking groove as the reference, the first curved surface is rough planed and then finish planed in sequence. During mirror machining, the pliers and other clamps are released, the flat structure 110 is flipped to ensure that the workpiece center axis coincides with the feed direction, and then the second locking groove and the second curved surface are rough planed and finish planed in sequence. The machining parameters are the same as those on the first side.

[0065] Furthermore, when milling the two flat surfaces 112 of the flat structure 110, the flat structure 110 is installed in a symmetrical fixture, and the two flat sides 111 are clamped. The coincidence of the central axis with the feed direction of the milling machine is calibrated by a dial indicator. The first retaining groove is rough milled and finish milled in sequence using a CNC milling machine. Then, the first curved surface is rough milled and finish milled in sequence using the end face of the first retaining groove as a reference. During mirror machining, the second retaining groove and the second curved surface are finish milled in sequence using the middle plane of the flat material as a reference through the mirror command of the CNC system. The machining parameters are the same as those of the first side.

[0066] In one specific embodiment, the manufacturing method further includes: inspecting the symmetry of the first snap-fit ​​groove and the second snap-fit ​​groove; and / or, inspecting the roundness of the first curved surface and the second curved surface.

[0067] It should be noted that the addition of symmetry and roundness inspection steps can promptly detect dimensional deviations generated during the machining of the integrated hinge shaft, preventing substandard hinge shaft 132 blanks from flowing into subsequent assembly processes and damaging the piston. The symmetry inspection ensures the symmetry accuracy of the two side locking grooves 131 and the curved surfaces of the hinge shaft 132, guaranteeing the compatibility between the compressor vane 130 and the piston. The roundness inspection ensures the smoothness of the curved surface of the hinge shaft 132, reducing wear when it is hinged to the piston and improving the operating stability of the compressor.

[0068] In one specific embodiment, the diameter of the hinge shaft 132 is 3mm to 5mm, and the depth of the snap-fit ​​groove 131 is 0.3mm to 1.5mm. The two flat surfaces 112 of the flat structure 110 are respectively machined to obtain half of the integral snap-fit ​​groove and integral hinge shaft. Specifically, the two flat surfaces 112 of the flat structure 110 are respectively rough machined to obtain the snap-fit ​​groove 131, leaving a 0.2mm to 0.3mm allowance for the snap-fit ​​groove 131, and then the snap-fit ​​groove 131 is fine machined. The two flat surfaces 112 are respectively rough machined to obtain the hinge shaft 132, leaving a 0.1mm to 0.3mm allowance for the hinge shaft 132, and then the hinge shaft 132 is fine machined.

[0069] It should be noted that the rough machining of the snap-fit ​​groove 131 and the hinge shaft 132 can quickly remove excess material and improve processing efficiency. The reasonable machining allowance can effectively offset the deformation caused by rough machining, providing a stable foundation for the fine machining of the snap-fit ​​groove 131 and the hinge shaft 132. The fine machining ensures the high precision of the integrated snap-fit ​​groove and the integrated hinge shaft, so that the error of the diameter of the hinge shaft 132 and the depth of the snap-fit ​​groove 131 is controlled within a reasonable range.

[0070] In one specific embodiment, the surface of the vane body 120 is finished to obtain the compressor vane 130, specifically including: rough grinding and at least one grinding of the initial sliding surface of the vane body 120 to obtain the sliding surface of the compressor vane 130; rough grinding and fine grinding of the initial end face of the vane body 120 to obtain the end face of the compressor vane 130; fine grinding of the initial hinge shaft 132 of the vane body 120 to obtain the hinge shaft 132 of the compressor vane 130; and nitriding treatment of the vane body 120.

[0071] It should be noted that the initial sliding surface, after rough grinding and at least one grinding, effectively reduces roughness, making the movement between the sliding surface and the compressor cylinder body smoother. The initial end face makes axial contact and limit contact with the compressor cylinder, preventing the compressor vane 130 from moving axially. Through rough grinding and fine grinding, wear between the end face and the compressor cylinder can be effectively reduced. The initial hinge shaft 132 is directly fine ground, removing a small amount of material from its surface, effectively reducing friction, noise, and vibration during hinge movement. Nitriding treatment of the vane body 120 forms a hard nitrided layer on its surface, significantly enhancing surface hardness, wear resistance, and corrosion resistance, and extending the service life of the compressor vane 130.

[0072] Preferably, when rough grinding the initial sliding surface of the slider body 120, a 100-grit grinding wheel is used, and a grinding allowance of 0.02 to 0.05 mm is retained; when grinding the initial sliding surface of the slider body 120 at least once, a combination of rough grinding and fine grinding is used. The rough grinding uses a grinding paste with a larger particle size, such as particle size W14, to make the surface roughness Ra ≤ 0.8 μm; the fine grinding uses a grinding paste with a smaller particle size, such as particle size W5, to make the surface roughness Ra ≤ 0.3 μm.

[0073] Preferably, when rough grinding and fine grinding are performed on the initial end face of the slide body 120, the feed speed for rough grinding is greater than that for fine grinding. For example, the feed speed for rough grinding is 4-8 mm / min, and the feed speed for fine grinding is 2-5 mm / min. After rough grinding, a fine grinding allowance of 0.02 to 0.05 mm is reserved to ensure that the parallelism error of the two end faces after fine grinding is ≤0.01 mm and the flatness error is ≤0.005 mm.

[0074] Preferably, when fine grinding the initial hinge shaft 132 of the slider body 120, a grinding wheel is selected, and the feed speed is, for example, 4-8 mm / min, so that the arc error is ≤0.01 mm and the surface roughness Ra is ≤0.3 μm.

[0075] Preferably, when nitriding the slider body 120, a gas nitriding process is adopted, the nitriding temperature is 500-550℃, the holding time is 4-6h, the nitriding layer thickness is 0.04 to 0.18mm, so that the surface hardness HV≥850; after nitriding, the two end faces are nitrided to effectively repair the defects of the nitriding layer and improve the surface quality, ensuring that the parallelism error of the two end faces is ≤0.01mm.

[0076] In one specific embodiment, the flat structure 110 is cut along its length direction according to a predetermined slider length to obtain a slider body 120 having a locking groove 131 and a hinge shaft 132. Specifically, this includes: cutting the flat structure 110 along its length direction according to the target length of the slider body 120 and the reserved finishing allowance; soft grinding the axial end faces of the slider body 120 obtained after cutting; and heat treating the slider body 120.

[0077] It should be noted that the allowance for finishing is reserved to avoid the cutting error affecting the dimensional accuracy of the finished product and to provide space for dimensional adjustment in subsequent finishing; the soft grinding process can quickly remove burrs from the cut end face, improve the flatness of the end face, and make the end face have a better positioning reference; the heat treatment process can improve the overall hardness and strength of the vane body 120, enhance its mechanical properties, and meet the stress requirements of the compressor vane 130 during compressor operation; equidistant cutting ensures the consistency of the dimensions of each vane body 120.

[0078] In one specific embodiment, see Figure 5 After finishing the surface of the vane body 120 to obtain the compressor vane 130, the manufacturing method further includes: milling spring grooves 133 on the compressor vane 130. Specifically, at least two spring grooves 133 are milled on the sliding surface away from the junction axis. The spring grooves 133 are arranged along the axial direction of the hinge axis 132 and are used to install springs so that the compressor vane 130 can be reset.

[0079] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A method for manufacturing a compressor vane, wherein the compressor vane has a sliding surface that is slidably connected to the compressor cylinder body, and a hinge shaft that is hinged to the compressor piston, for realizing eccentric rotation of the compressor piston and crankshaft to achieve air compression, characterized in that, The manufacturing method includes: The raw material is cold-drawn through a mold hole to form a flat material structure; The flat structure is ground to correct its thickness and width; The two flat surfaces of the flat material structure are respectively machined to obtain an integral snap-fit ​​groove and an integral hinge shaft on each half. The flat material structure is cut along its length to a predetermined slide length to obtain a slide body with a snap-fit ​​groove and a hinge shaft; The compressor vane is obtained by precision machining the surface of the vane body; The process of machining the two flat surfaces of the flat material structure to obtain a half-integrated snap-fit ​​groove and an integrated hinge shaft specifically includes: Using a forming tool, the first snap-fit ​​groove on one side of the flat material structure and the first curved surface of the hinge shaft on the same side are machined simultaneously; the second snap-fit ​​groove on the other side and the second curved surface of the hinge shaft are machined by mirroring the middle plane of the flat material structure as a reference.

2. The manufacturing method according to claim 1, characterized in that, The mold hole includes: a flat hole, wherein at least one of the two flat ends of the flat hole is a straight edge; The process of cold drawing the raw material through a mold hole to form a flat structure specifically includes: cold drawing the raw material through a mold hole to form a flat structure having two opposing flat surfaces and at least one flat side surface.

3. The manufacturing method according to claim 2, characterized in that, The raw material passes through at least two mold holes and is cold-drawn at least twice to form two opposing flat sides; Grinding the flat material structure specifically includes grinding the flat side surface and the flat surface of the flat material structure; Before machining any one of the flat surfaces of the flat material structure, the manufacturing method further includes: mounting the flat material structure onto a fixture and clamping the two opposing flat surfaces.

4. The manufacturing method according to any one of claims 1-3, characterized in that, The process of machining the two flat surfaces of the flat material structure to obtain a half-integrated snap-fit ​​groove and an integrated hinge shaft specifically includes: The two flat surfaces of the flat material structure are planed and / or milled to obtain an integral snap-fit ​​groove and an integral hinge shaft on each side.

5. The manufacturing method according to claim 1, characterized in that, The manufacturing method further includes: The symmetry of the first card slot and the second card slot is inspected; And / or, check the roundness of the first surface and the second surface.

6. The manufacturing method according to any one of claims 1-3, characterized in that, The diameter of the hinge shaft is 3mm to 5mm, and the depth of the snap-fit ​​groove is 0.3mm to 1.5mm; The process of machining the two flat surfaces of the flat material structure to obtain a half-integrated snap-fit ​​groove and an integrated hinge shaft specifically includes: The two flat surfaces of the flat material structure are rough-machined with snap-fit ​​grooves, leaving a 0.2mm to 0.3mm allowance for the snap-fit ​​grooves, and then the snap-fit ​​grooves are fine-machined; the two flat surfaces are rough-machined with hinge shafts, leaving a 0.1mm to 0.3mm allowance for the hinge shafts, and then the hinge shafts are fine-machined.

7. The manufacturing method according to claim 6, characterized in that, The compressor vane is obtained by precision machining of the surface of the vane body, specifically including: The initial sliding surface of the vane body is coarsely ground and ground at least once to obtain the sliding surface of the compressor vane; The end face of the compressor vane is obtained by rough grinding and fine grinding of the initial end face of the vane body; The hinge shaft of the compressor vane is obtained by fine grinding the initial hinge shaft of the vane body; The slider body is subjected to nitriding treatment.

8. The manufacturing method according to claim 1, characterized in that, The raw material is coiled or bar steel with a circular cross-section.

9. The manufacturing method according to claim 1, characterized in that, The process of cutting along the length of the flat material structure to a predetermined slide length to obtain a slide body with a locking groove and a hinge shaft specifically includes: Along the length of the flat material structure, the flat material structure is cut according to the target length of the slider body and the reserved finishing allowance; The axial end faces obtained after cutting the slide body are subjected to soft grinding. The slide body is subjected to heat treatment.

Images