Grinding equipment and processing technology for screw processing

Abstract

The present application discloses a grinding device and a processing technology for screw processing, which relates to the field of screw processing technology. The device comprises a workbench, wherein the workbench is provided with a linear feeding trough for feeding workpieces one by one, and a baffle is installed at the discharge end of the feeding trough; a feeding shaft fixedly installed on one side of the discharge end of the feeding trough, and the feeding shaft is parallel to the working surface of the workbench; an axial grinding tool provided on one side of the feeding shaft and a first drive assembly for driving the grinding tool into / away from any spiral groove 12 of the workpiece and driving the grinding tool to rotate; and a second drive assembly for driving the workpiece to rotate around the axis of the feeding shaft and synchronously advance / retreat along the axis of the feeding shaft. The grinding device in the present application enables the grinding part to adapt to the complex shape of the spiral groove 12 of the screw of a single-screw compressor through the cooperation of the feeding shaft, the first drive assembly, and the second drive assembly, thereby realizing efficient and automated grinding and milling of the screw and improving the screw processing accuracy.

Description

Technical Field

[0001] The present application relates to the field of screw processing technology, and in particular to a grinding device and a processing technology for screw processing. Background Art

[0002] The single screw compressor consists of a cylindrical screw and two symmetrically arranged planar star wheels forming a meshing pair, which are installed in the casing. Among them, the shape of the cylindrical screw (hereinafter referred to as "screw") is as follows Figure 1 and Figure 2 As shown, the tooth flanks of screw 1 are multi-cylindrical envelope surfaces, while the bottom surface is a spherical arc surface. Multiple balancing holes 11 are uniformly arranged in a circular array around the screw's axis. The outer circumference of screw 1 is provided with a spiral groove 12 suitable for meshing with the planetary gear teeth. Screw 1 is coaxially mounted on the screw shaft. The spiral groove 12, the inner wall of the casing (cylinder), and the planetary gear teeth form a closed volume. During operation of a single-screw compressor, power is transmitted to the screw shaft, which drives the planetary gear to rotate. Gas enters the screw groove from the suction chamber and, after compression, is discharged through the exhaust port and the exhaust chamber. As the planetary gear teeth move relative to each other within the screw groove, the closed volume gradually decreases, compressing the gas.

[0003] The processing and assembly technology of cylindrical screw and star wheel is the technical core of single-screw compressor, which is concentrated in the tooth surface meshing condition. High-quality single-screw compressors require that the screw and star wheel meshing pair should achieve simultaneous meshing of all tooth surfaces in the meshing area without running-in, and the total meshing area of ​​each tooth surface should be no less than 90%.

[0004] In the actual processing of the screw of a single-screw compressor, since the side surface of the screw tooth of the single-screw compressor is a complex shape composed of multiple cylindrical enveloping surfaces and the bottom surface is a spherical arc surface, it is difficult for conventional rotary tools to directly and effectively grind the spiral groove 12 of the screw. Manual grinding is labor-intensive and the screw processing accuracy and surface roughness are difficult to control. Summary of the Invention

[0005] In order to achieve efficient grinding of the screw of a single-screw compressor and improve the processing accuracy and surface roughness of the screw of the single-screw compressor, the present application provides a grinding device and a processing technology for screw processing.

[0006] This application provides a screw processing grinding device, which adopts the following technical solution:

[0007] A grinding device for screw processing comprises a workbench, wherein the workbench is provided with a linear feeding trough for feeding workpieces one by one, the linear extension direction of the feeding trough is perpendicular to the axial direction of the workpiece, and a baffle is installed at the discharge end of the feeding trough; a feeding shaft fixedly mounted on the workbench and located on one side of the discharge end of the feeding trough, the feeding shaft being parallel to the working surface of the workbench; an axial grinding tool provided on one side of the feeding shaft and a first drive assembly for driving the grinding tool into / away from any spiral groove 12 of the workpiece and driving the grinding tool to rotate around the axis of the grinding tool; a second drive assembly for driving the workpiece to rotate around the axis of the feeding shaft and synchronously advance / retreat along the axis of the feeding shaft; when the grinding device is in a non-working state, the grinding tool is perpendicular to the feeding shaft, and an operating gap suitable for the placement of the workpiece is formed between the feeding trough, the baffle and the feeding shaft.

[0008] By adopting the above-mentioned technical solution, in the process of processing the screw of a single-screw compressor (hereinafter referred to as "screw"), the workpieces are first loaded one by one through the loading trough to the operating gap between the loading trough, the baffle and the loading shaft, and installed on the loading shaft. Then, under the driving action of the second driving component, the workpieces rotate around the axis of the loading shaft and move forward / backward synchronously along the axis of the loading shaft; the first driving component drives the shaft-shaped grinding tool to be placed into any spiral groove 12 to be ground of the workpiece during the process of the workpiece moving forward / backward on the loading shaft, and drives the grinding tool to rotate around the axis of the grinding tool, and uses the end and side of the grinding tool to grind the bottom wall and side wall surface of the spiral groove 12 respectively. The grinding equipment as a whole cooperates with the feeding shaft, the first drive assembly, and the second drive assembly, so that the shaft-shaped grinding tool can adapt to the complex shape of the spiral groove 12 of the single-screw compressor screw, thereby realizing efficient and automated grinding and milling of the single-screw compressor screw, reducing the subjective deviation caused by manual grinding, effectively improving the screw processing accuracy of the single-screw compressor, and ensuring the surface roughness of the screw.

[0009] 4. The repairing kit for automotive dents, according to claim 1, wherein a bottom of the foot stand comprises a through-hole, and the two foot pieces comprise two bosses, wherein the bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut.

[0010] By adopting the above technical solution, after the workpiece is placed in the operating gap, the workpiece is placed on the sliding ring and the first positioning member is used to limit the relative rotation between the workpiece and the sliding ring, so that the workpiece can rotate synchronously with the sliding ring when the sliding ring rotates; then the first linear drive member and the second linear drive member are used to drive the first top plate and the second top plate to slide along the axis of the feeding shaft respectively, and the first top plate / the second top plate is used to apply a linear driving force along the axis of the feeding shaft to the workpiece, so that the workpiece and the sliding ring can rotate along the circumference of the feeding shaft and move along the axial direction of the feeding shaft under the thread restriction of the feeding shaft, so that the spiral groove 12 of the workpiece can be opposite to the grinding end of the grinding tool, and the grinding end of the grinding tool can be abutted against the bottom wall / side wall surface of the spiral groove 12 of the workpiece to realize the grinding and milling of the surface of the spiral groove 12 of the workpiece.

[0011] Optionally, the first positioning member is a positioning protrusion, and there are multiple positioning protrusions. The multiple positioning protrusions are distributed in a ring array around the feeding shaft, and the positioning protrusions are plug-fitted into the balancing holes on the workpiece.

[0012] By adopting the above technical solution, the positioning protrusion is inserted into the balancing hole on the workpiece, and the first top plate / the second top plate is used to cooperate with the limiting boss to clamp the workpiece between the first top plate and the limiting boss / between the second top plate and the limiting boss, which can more conveniently achieve relative stillness of the workpiece and the sliding ring, and make the workpiece move synchronously with the sliding ring.

[0013] Optionally, a first mounting seat for installing the feeding shaft is fixedly provided on the workbench at the end of the feeding shaft away from the feeding trough, and an elastic member is provided between the second top plate and the first mounting seat. The two ends of the elastic member are respectively fixedly installed on the second top plate and the first mounting seat, and the extension and contraction direction of the elastic member is parallel to the axial direction of the feeding shaft.

[0014] By adopting the above technical solution, the elastic member can elastically buffer the sliding of the second top plate and the sliding ring when the first linear drive member drives the first top plate to move toward the second top plate, thereby making the movement process of the workpiece on the loading shaft more stable.

[0015] Optionally, a third mounting seat is fixedly provided on the workbench on one side of the feeding shaft, and the first driving assembly includes a ball seat mounted on the third mounting seat, a ball head rotatably connected to the ball seat, a steering control component for driving the ball head to rotate in the ball seat, and a driving motor for driving the grinding tool to rotate, the driving motor is fixedly mounted on the ball head, and the grinding tool is coaxially fixed to the end of the output shaft of the driving motor and passes through the center of the ball head.

[0016] By adopting the above technical solution, the steering control component is used to drive the ball head to rotate in the ball seat, which can correspondingly drive the grinding tool to rotate in the ball seat, so that the grinding tool can effectively adapt to the spiral direction of the spiral groove 12 of the workpiece, thereby improving the processing accuracy of the screw.

[0017] Optionally, the third mounting seat is provided with a sliding seat and a third linear drive component for adjusting the distance between the ball seat and the third mounting seat. The sliding seat is slidably connected to the third mounting seat in a direction perpendicular to the feeding axis, and the grinding tool and the first drive assembly are both installed on the sliding seat.

[0018] By adopting the above technical solution, the third linear drive member is used to drive the sliding seat to slide in a direction perpendicular to the loading axis, so that the grinding tool and the first drive assembly on the sliding seat can be easily approached / moved away from the workpiece, thereby controlling the depth of the grinding tool inserted into the spiral groove 12 of the workpiece, thereby facilitating the adaptive grinding of spiral grooves 12 of different depths on the screw.

[0019] Optionally, the steering control component includes a plurality of driving cylinders evenly distributed around the ball seat, one end of the driving cylinder is hinged to the sliding seat, and the other end passes through the ball seat and is spherically hinged to the ball head.

[0020] By adopting the above technical solution, by controlling the extension and retraction of multiple driving cylinders, the rotation control of the grinding tool on the sliding seat can be achieved more conveniently and efficiently, thereby achieving the angle control of the grinding tool placed in the spiral groove 12 of the workpiece, making it easier for the grinding tool to adaptively grind the side walls of the spiral groove 12 on the screw.

[0021] Optionally, the workbench is further provided with a rotation adjustment component for rotating the workpiece by ß degrees along the circumferential direction of the feeding shaft after grinding of a spiral groove 12 on the workpiece is completed, where ß degrees is the angle between two adjacent balancing holes on the workpiece and the axis of the workpiece.

[0022] By adopting the above technical solution, after the grinding of one spiral groove 12 on the workpiece is completed, the operator can use the rotation adjustment component to rotate the workpiece by ß degrees, thereby realizing the grinding of the next spiral groove 12 adjacent to the ground spiral groove 12 on the workpiece, without the need for manual adjustment, which is conducive to improving the automated processing efficiency of the workpiece.

[0023] Optionally, a second mounting seat is fixedly provided on the workbench at a side of the loading chute away from the loading shaft, and the first linear drive member is fixedly mounted on the second mounting seat;

[0024] The rotation adjustment assembly includes a grab plate, a rotating component and a reset component. The grab plate is an electromagnetic component. A second positioning component opposite to the first positioning component is provided on the side of the grab plate close to the loading shaft. The second positioning component is plugged into and adapted to the balance hole on the workpiece. The rotating component is used to drive the grab plate to rotate ß degrees along the circumferential direction of the loading shaft when the first linear drive component drives the first top plate to retract outside the loading trough. The reset component is used to drive the grab plate to rotate negative ß degrees when the first linear drive component drives the first top plate to lift the workpiece toward the loading shaft.

[0025] By adopting the above technical solution, the power on and off of the grab plate is controlled, and the grab plate is coordinated with the first linear drive member and the second linear drive member, so that the grab plate can magnetically fix / release the workpiece, and the workpiece can be synchronously rotated by 8 degrees with the grab plate under the driving action of the rotating component when it is magnetically fixed to the grab plate, so that the next spiral groove 12 to be processed on the workpiece surface can be aligned with the grinding tool, and the grab plate can be rotated again by a negative 8 degrees during the process of grinding the next spiral groove 12 that has been adjusted in the workpiece, so as to realize the reuse of the rotation adjustment component, thereby efficiently realizing multiple grinding of the workpiece without removing the workpiece.

[0026] The present application also provides a screw processing process, which is based on the above-mentioned screw processing grinding device and includes the following steps:

[0027] S1: Incoming material inspection; S2: Rough turning; S3: Heat treatment; S4: Hardness testing; S5: Processing inspection, correction / elimination of inferior products, correction of deformation problems of the screw after heat treatment, detection of slag inclusions, pores, cracks, etc. on the screw, use grinding equipment to remove excess material from the contour of the screw's special-shaped spiral groove 12, and ensure that the screw's dimensional tolerance and form and position tolerance meet the requirements of the drawing; S6: Obtain qualified screw products.

[0028] By adopting the above technical solution, the screw processing technology in this application can effectively adapt to the complex shape of the screw tooth side surface (multi-cylindrical envelope surface) of the single-screw compressor, realize efficient and automated grinding and milling of the screw, remove excess material from the contour of the screw's special-shaped spiral groove 12, reduce the subjective deviation caused by manual grinding, effectively improve the screw processing accuracy of the single-screw compressor, ensure the surface roughness of the screw, make the dimensional tolerance and form and position tolerance of the screw meet the requirements of the drawing, obtain qualified screw products, and improve processing efficiency.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. The grinding equipment in this application can effectively adapt to the complex shape of the screw tooth flanks (multi-cylindrical envelope surfaces) of a single-screw compressor, achieve efficient and automated grinding and milling of the screw, remove excess material from the contour of the screw's special-shaped spiral groove 12, and reduce the subjective deviation caused by manual grinding, thereby improving the processing accuracy of the screw of the single-screw compressor, ensuring the surface roughness of the screw, ensuring that the dimensional tolerance and form and position tolerance of the screw meet the requirements of the drawing, and improving processing efficiency;

[0031] 2. The feeding shaft, the first drive assembly, the second drive assembly and the shaft-shaped grinding tool cooperate to more efficiently and conveniently achieve the adaptation of the grinding end of the grinding tool to the spiral groove 12 of the workpiece, so that the grinding end of the grinding tool stably abuts against the bottom wall / side wall surface of the spiral groove 12 of the workpiece, thereby achieving grinding and milling of the surface of the spiral groove 12 of the workpiece;

[0032] 3. By further setting up a rotation adjustment component, the angle adjustment between two adjacent spiral grooves 12 on the workpiece can be efficiently achieved, so that the grinding tool can be quickly adjusted from the spiral groove 12 that has been ground to the next spiral groove 12 adjacent to the ground spiral groove 12, and no manual adjustment is required during the process, which effectively improves the automated processing efficiency of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0034] Figure 1 Schematic diagram of the overall structure of the screw (or workpiece) in the embodiment of the present application;

[0035] Figure 2 yes Figure 1 Schematic cross-section along line BB;

[0036] Figure 3 This is a schematic diagram of the overall structure of the grinding device and the screw in the embodiment of the present application;

[0037] Figure 4 This is a schematic diagram of the overall structure of the grinding equipment in the embodiment of the present application;

[0038] Figure 5 yes Figure 4 A magnified schematic diagram of part A;

[0039] Figure 6 yes Figure 4 An enlarged schematic diagram of part B;

[0040] Figure 7 It is a flow chart of the screw processing process in the embodiment of the present application.

[0041] Figure numerals: 1, screw; 11, balancing hole; 12, spiral groove; 2, workbench; 21, feeding trough; 22, first mounting seat; 23, second mounting seat; 24, third mounting seat; 241, sliding seat; 242, third linear drive member; 3, feeding shaft; 31, elastic member; 4, grinding tool; 5, first drive assembly; 51, ball seat; 52, ball head; 53, steering control component; 531, driving cylinder; 54, driving motor; 6, second drive assembly ; 61. Sliding ring; 611. Limiting boss; 612. First positioning member; 62. First top plate; 63. First linear drive member; 64. Second top plate; 65. Second linear drive member; 7. Rotation adjustment assembly; 71. Grabbing plate; 711. Second positioning member; 72. Rotating member; 721. Active bevel gear; 722. Passive bevel gear; 723. Drive gear; 724. Drive rack; 73. Reset member; 731. Slide rod; 732. Shift block. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-7 This application is described in further detail.

[0043] The embodiment of the present application discloses a grinding device for screw processing.

[0044] Reference Figure 1 、 Figure 2 and Figure 3A screw processing grinding device includes a workbench 2, a feeding shaft 3, a shaft-shaped grinding tool 4, a first drive assembly 5, a second drive assembly 6 and a steering adjustment assembly. The upper surface of the workbench 2 is a horizontal working surface. A linear feeding trough 21 for feeding workpieces one by one is provided on the upper surface of the workbench 2. A baffle is installed at the discharge end of the feeding trough 21; Figure 3 The loading shaft 3 is located on one side of the discharge end of the loading trough 21 and is arranged perpendicular to the loading trough 21. An operating gap suitable for inserting the workpiece is formed between the loading shaft 3, the loading trough 21 and the baffle; the shaft-shaped grinding tool 4 and the first drive assembly 5 are both located on one side of the loading shaft 3, and the grinding tool 4 is used to grind the spiral groove 12 of the workpiece. The first drive assembly 5 is used to drive the grinding tool 4 into / away from any spiral groove 12 of the workpiece and drive the grinding tool 4 to rotate around the axis of the grinding tool 4; the second drive assembly 6 is used to drive the workpiece to rotate around the axis of the loading shaft 3 and move forward / backward synchronously along the axis of the loading shaft 3, so that the grinding tool 4 adapts to the spiral groove 12 of the workpiece.

[0045] Specifically, refer to Figure 3 and Figure 4 The bottom wall of the loading chute 21 is sloped, and the feeding end of the loading chute 21 is higher than the discharging end. When the workpiece is loaded by the loading chute 21, the axis of the workpiece is perpendicular to the extension direction of the loading chute 21.

[0046] On the workbench 2, a first mounting seat 22 for installing the feeding shaft 3 is fixedly provided at the end of the feeding shaft 3 away from the feeding trough 21. The first mounting seat 22 is in the shape of a rectangular plate and is arranged vertically. The end of the feeding shaft 3 away from the feeding trough 21 is vertically and fixedly installed in the middle of the first mounting seat 22.

[0047] In the embodiment of the present application, the grinding tool 4 can be an axial milling cutter, the end of the milling cutter away from the first drive component 5 is a pointed end, and the end of the milling cutter away from the first drive component 5 is suitable for abutting against the workpiece, and the end of the milling cutter away from the first drive component 5 is used to realize the grinding of the bottom wall of the spiral groove 12 / the tooth side surface (or tooth side wall) at the spiral groove 12 of the workpiece. A milling groove is provided on the outer peripheral wall of the milling cutter, and the outer peripheral wall of the milling cutter is used to grind the tooth side surface of the spiral groove 12 of the workpiece; in other application embodiments, the grinding tool 4 can also be an axial grinding rod, and the surface of the grinding tool 4 is coated with a frosted layer. The grinding rod and the frosted layer are used to grind materials with relatively low hardness requirements.

[0048] Reference Figure 4 and Figure 5 The second driving assembly 6 specifically includes a sliding collar 61 , a first top plate 62 , a first linear driving member 63 , a second top plate 64 and a second linear driving member 65 .

[0049] The outer peripheral wall of the feeding shaft 3 is threaded, and the sliding ring 61 is coaxially sleeved and threadedly connected to the feeding shaft 3, and the end of the sliding ring 61 away from the feeding trough 21 is provided with a limiting boss 611 protruding outward along its circumference, and the workpiece is suitable for being coaxially sleeved on the sliding ring 61; the limiting boss 611 is provided with a first positioning member 612 for limiting the relative rotation between the workpiece and the sliding ring 61, and an elastic member 31 is provided between the limiting boss 611 and the first mounting seat 22. The elastic member 31 is preferably a spring, which is coaxially sleeved on the feeding shaft 3, and the two ends of the spring are respectively fixedly mounted on the second top plate 64 and the first mounting seat 22, and the expansion and contraction direction of the spring is parallel to the axial direction of the feeding shaft 3.

[0050] Reference Figure 5 The first positioning member 612 is a positioning protrusion, which is integrally fixed to the side of the limiting boss 611 close to the loading trough 21 and is perpendicular to the limiting boss 611. The number of positioning protrusions is preferably multiple, and the multiple positioning protrusions are distributed in a circular array around the loading shaft 3, and the positioning protrusion is plugged into and adapted to the balancing hole 11 on the workpiece.

[0051] Replay Figure 4 The first linear drive member 63 and the second linear drive member 65 are preferably linear drive cylinders. A second mounting seat 23 is vertically and fixedly installed on the workbench 2, located on the side of the loading trough 21 away from the loading shaft 3. The second mounting seat 23 is arranged opposite to the first mounting seat 22. The first linear drive member 63 is vertically and fixedly installed on the second mounting seat 23, and the first top plate 62 is fixedly installed on the output shaft end of the first linear drive member 63; the second linear drive member 65 is vertically and fixedly installed on the first mounting seat 22, and the second top plate 64 is fixedly installed on the output shaft end of the second linear drive member 65; and the first top plate 62 and the second top plate 64 are both annular, and the first top plate 62 and the second top plate 64 are coaxially arranged on the outside of the two ends of the sliding ring 61, and the first top plate 62 and the second top plate 64 are both slidably installed on the workbench 2 along the axis of the loading shaft 3.

[0052] After the workpiece is placed in the operating gap, the workpiece is placed on the sliding ring 61 and the first positioning member 612 is used to limit the relative rotation between the workpiece and the sliding ring 61, so that the workpiece can rotate synchronously with the sliding ring 61 when the sliding ring 61 rotates; then the first linear drive member 63 and the second linear drive member 65 are used to drive the first top plate 62 and the second top plate 64 to slide along the axis of the loading shaft 3 respectively, and the first top plate 62 / the second top plate 64 is used to apply a linear driving force along the axis of the loading shaft 3 to the workpiece, so that the workpiece and the sliding ring 61 can rotate along the circumference of the loading shaft 3 and move along the axial direction of the loading shaft 3 under the thread restriction of the loading shaft 3, so that the spiral groove 12 of the workpiece can be opposite to the grinding end of the grinding tool 4, and the grinding end of the grinding tool 4 can be abutted against the bottom wall / side wall surface of the spiral groove 12 of the workpiece to realize the grinding and milling of the surface of the spiral groove 12 of the workpiece.

[0053] Reference Figure 5 The elastic member 31 can elastically buffer the sliding of the second top plate 64 and the sliding collar 61 when the first linear drive member 63 drives the first top plate 62 to move toward the second top plate 64, thereby making the movement process of the workpiece on the loading shaft 3 more stable.

[0054] Further, refer to Figure 4 and Figure 5 , a third mounting seat 24 for installing the first drive component 5 is fixedly provided on the workbench 2, located on one side of the feeding shaft 3. The third mounting seat 24 is also in the shape of a rectangular plate. The third mounting seat 24 is perpendicular to the workbench 2, and the side surface of the third mounting seat 24 close to the feeding shaft 3 is parallel to the feeding shaft 3; the first drive component 5 specifically includes a ball seat 51 mounted on the third mounting seat 24, a ball head 52 rotatably connected to the ball seat 51, a steering control component 53 for driving the ball head 52 to rotate in the ball seat 51, and a drive motor 54 for driving the grinding tool 4 to rotate. The drive motor 54 is fixedly mounted on the ball head 52 and the output shaft of the drive motor 54 passes through the center of the ball head 52. The grinding tool 4 is coaxially fixed to the end of the output shaft of the drive motor 54 and passes through the center of the ball head 52.

[0055] In order to facilitate the adaptive milling of spiral grooves 12 of different depths on the workpiece, refer to Figure 5The third mounting seat 24 is provided with a sliding seat 241 and a third linear drive component 242 for adjusting the distance between the ball seat 51 and the third mounting seat 24. The sliding seat 241 is slidably connected to the third mounting seat 24 in a direction perpendicular to the feeding shaft 3. The grinding tool 4 and the first drive assembly 5 are both mounted on the sliding seat 241 through the steering control component 53; the third linear drive component 242 is used to drive the sliding seat 241 to slide in a direction perpendicular to the feeding shaft 3, so that the grinding tool 4 and the first drive assembly 5 on the sliding seat 241 can be easily approached / moved away from the workpiece, thereby controlling the depth of the grinding tool 4 inserted into the spiral groove 12 of the workpiece.

[0056] Reference Figure 5 In the embodiment of the present application, the steering control component 53 includes a plurality of driving cylinders 531 evenly distributed around the ball seat 51, one end of the driving cylinder 531 is hinged to the sliding seat 241, and the other end passes through the ball seat 51 and is spherically hinged to the ball head 52.

[0057] The steering control component 53 is used to drive the ball head 52 to rotate within the ball seat 51, which in turn drives the grinding tool 4 and the drive motor 54 to rotate synchronously with the ball head 52 within the ball seat 51. At the same time, the drive motor 54 is started and used to control the rotation of the grinding tool 4, which can further adjust the rotational power of the grinding tool 4, thereby allowing the grinding tool 4 to effectively adapt to the helical direction of the spiral groove 12 of the workpiece, thereby improving the processing accuracy of the screw 1.

[0058] Further, refer to Figure 5 In order to reduce manual adjustments and operating clearances during grinding and milling, the grinding tool 4 and the first drive assembly 5 are preferably arranged in two groups on the workbench 2 with the third mounting seat 24. The two groups of grinding tools 4 and the first drive assembly 5 are symmetrically arranged on both sides of the feeding shaft 3 with the third mounting seat 24, so as to synchronously grind the upper and lower tooth side surfaces at the same spiral groove 12 of the workpiece respectively; at the same time, the workbench 2 is also provided with a rotation adjustment assembly 7 for rotating the workpiece by ß degrees along the circumferential direction of the feeding shaft 3 after the grinding of a spiral groove 12 on the workpiece is completed.

[0059] Reference Figure 4 and Figure 6 The rotation adjustment component 7 specifically includes a grab plate 71, a rotating component 72 and a reset component 73. The angle ß is the angle between two adjacent balancing holes 11 on the workpiece and the axis of the workpiece.

[0060] The grabbing plate 71, the rotating component 72 and the resetting component 73 are all installed on the second mounting seat 23, and the grabbing plate 71 is an electromagnetic component. The operator can control the magnetic force of the grabbing plate 71 by controlling the power on and off of the grabbing plate 71; the side of the grabbing plate 71 close to the feeding shaft 3 is provided with a second positioning member 711 opposite to the first positioning member 612, and the second positioning member 711 is plugged and adapted to the balance hole 11 on the workpiece.

[0061] The rotating component 72 specifically includes a driving bevel gear 721 , a driven bevel gear 722 , a driving gear 723 and a driving rack 724 , which are mounted on a side of the second mounting base 23 away from the feeding shaft 3 .

[0062] Reference Figure 4 and Figure 6 The grabbing plate 71 is circular and is rotatably mounted on the rear middle part of the second mounting seat 23. The active bevel gear 721 is coaxially fixedly mounted on the rotating shaft of the grabbing plate 71, and the active bevel gear 721 is in transmission meshing engagement with the passive bevel gear 722; the driving rack 724 is slidably connected to the second mounting seat 23 in a direction parallel to the feeding shaft 3, and the driving rack 724 is rotatably engaged with the driving gear 723, the driving gear 723 and the passive bevel gear 722 are coaxially fixed, and the driving gear 723 and the passive bevel gear 722 are both rotatably connected to the second mounting seat 23, and the rotation axis of the driving gear 723 is parallel to the side surface of the second mounting seat 23 away from the feeding shaft 3.

[0063] After the grinding of one spiral groove 12 on the workpiece is completed, the operator can use the rotation adjustment component 7 to rotate the workpiece by ß degrees, specifically: the first top plate 62 lifts the driving rack 724 toward the side away from the second top plate 64, so that the driving rack 724 slides toward the side away from the loading shaft 3, and accordingly drives the active bevel gear 721 to rotate, so that the workpiece is rotated by ß degrees, thereby realizing the grinding of the next spiral groove 12 on the workpiece adjacent to the ground spiral groove 12.

[0064] Reference Figure 6 The reset component 73 specifically includes a slide rod 731 and a shift block 732 installed on the second mounting seat 23. The reset component 73 is used to drive the grab plate 71 to rotate negative ß degrees when the first linear drive member 63 drives the first top plate 62 to lift the workpiece toward the loading shaft 3.

[0065] Specifically, the slide rod 731 is parallel to the feeding shaft 3, and the slide rod 731 is vertically and slidably installed on the second mounting seat 23 along its axial direction. The end of the slide rod 731 close to the feeding shaft 3 is fixedly connected to the first top plate 62, and the end away from the feeding shaft 3 is fixedly connected to the shift block 732; the maximum ejection length of the output shaft of the first linear drive member 63 is the farthest distance that the sliding ring 61 moves from the first top plate 62 toward the second top plate 64, and the shift block 732 is suitable for pressing against the driving rack 724 and causing the driving rack 724 to slide toward the feeding shaft 3 when the first top plate 62 moves toward the second top plate 64 to the maximum ejection length of the output shaft of the first linear drive member 63.

[0066] Reference Figure 4 and Figure 6 When the workpiece has achieved a 3-degree rotation, the operator can use the first linear drive member 63 to drive the first top plate 62 toward the first mounting seat 22, so that the first top plate 62 again drives the sliding ring 61 toward the first mounting seat 22, thereby causing the sliding ring 61 to drive the workpiece to rotate around the loading shaft 3, so that the spiral groove 12 on the workpiece adapts to the grinding tool 4; at the same time, as the operator uses the first linear drive member 63 to drive the first top plate 62 toward the first mounting seat 22, the first top plate 62 can drive the shift block 732 toward the first mounting seat 22, and cause the shift block 732 to drive the driving rack 724 to slide toward the loading shaft 3, thereby driving the passive bevel gear 722 to drive the active bevel gear 721 to drive the grab plate 71 to rotate a negative 3-degree, thereby realizing the synchronous reset of the rotating component 72 and the reset component 73 with the first linear drive member 63.

[0067] At the same time, the operator can control the power on and off of the grab plate 71 to make the grab plate 71 cooperate with the first linear drive member 63 and the second linear drive member 65, and realize the magnetic fixation of the grab plate 71 to the workpiece when the first linear drive member 63 drives the first top plate 62 to retreat outside the loading trough 21, or release the magnetic fixation of the workpiece by the grab plate 71 when the first linear drive member 63 drives the first top plate 62 to lift the workpiece toward the loading shaft 3, and enable the workpiece to be magnetically fixed with the grab plate 71 and rotate synchronously with the grab plate 71 by 8 degrees under the driving action of the rotating component 72, so that the next spiral groove 12 to be processed on the workpiece surface can be aligned with the grinding tool 4, and the grab plate 71 can be rotated again by 8 degrees during the grinding of the next spiral groove 12 that has been adjusted in the workpiece, so as to realize the reuse of the rotation adjustment component 7, thereby efficiently realizing multiple grinding of the workpiece without removing the workpiece.

[0068] On the other hand, refer to Figure 7 The present application also provides a screw processing process, which is based on the above-mentioned screw processing grinding device and includes the following steps:

[0069] S1: Incoming material inspection; martensitic stainless steel (material 1Cr13) is selected as the raw material of screw 1, the shape and size of screw 1 are controlled in advance, and the elemental composition of the material is detected by a spectrometer; and due to medium reasons, 1Cr13 material has the advantages of good corrosion resistance, good vibration reduction performance and stable processing and cutting performance.

[0070] S2: Rough turning, remove excess material, control the allowance, and obtain the blank.

[0071] S3: Heat treatment, which allows the blank to be heated evenly, so that the internal stress of the blank can be better removed during the heat treatment process, the mechanical properties of the material can be improved, and the strength and toughness of the material can be well matched. At the same time, the plasticity, cutting performance, hardness, wear resistance, etc. of the material can be comprehensively improved to ensure the long-term stable operation of the processed screw 1.

[0072] S4: Hardness testing, to control the hardness of the blank after heat treatment and ensure that the blank entering the next stage meets the design requirements.

[0073] S5: Processing inspection, correction / elimination of inferior products, which specifically includes the following steps:

[0074] (1) Semi-finishing machining: Correct the deformation problem of screw 1 after heat treatment, such as the drawing tolerance size, form and position tolerance requirements, and reduce the machining allowance again to prepare for finishing;

[0075] (2) RT testing: The purpose is to detect whether the screw 1 blank is damaged during forging, rough machining, semi-finishing and heat treatment, such as slag inclusion, pores, cracks, etc., to fully ensure that the material of the screw 1 meets the design requirements;

[0076] (3) Five-axis rough machining: The purpose is to remove the excess material of the screw 1 special-shaped spiral groove 12 contour, while retaining a 0.5MM-1MM contour margin to eliminate the problem of stress and deformation in the material; use the software three-dimensional modeling module to build a 3D model, use the software motion simulation module to check the rotation interference problem of the 3D model, use the processing software CAM module to write the five-axis processing program, and use the software drawing module to write the five-axis program sheet, replacing the uncertainty and errors of complex manual programming calculations, realizing digital processing control, improving processing efficiency, and ensuring the correctness and reliability of the processing program;

[0077] (4) Precision turning and boring: Precision boring of inner hole, precision turning of outer diameter and end face according to the drawing requirements, ensuring that the dimensional tolerance and form and position tolerance meet the drawing requirements;

[0078] (5) Five-axis finishing: The purpose is to finish the screw 1 contour special-shaped spiral groove 12 curved surface; use the software 3D modeling module to build a 3D model, use the software motion simulation module to check the 3D model rotation interference problem, use the processing software CAM module to write the five-axis turning and milling compound machine tool processing program, use the software drawing module to write the five-axis turning and milling compound machine tool program sheet, replace the uncertainty and error of complex manual programming calculation methods, realize digital processing control, improve processing efficiency, and ensure the correctness and reliability of the processing program;

[0079] (6) PT test: The purpose is to use penetrant and developer to detect whether there are defects in the screw 1 after finishing;

[0080] (7) Three-coordinate detection: Use advanced three-coordinate instruments to measure the surface dimensions of a single screw, and inspect the machining accuracy to be within 0.02MM to be qualified. This effectively verifies the consistency between the three-dimensional model and the screw 1 machined by the five-axis turning and milling composite process, and ensures that the operating clearance of the compressor meets the R&D requirements.

[0081] S6: Obtain qualified screw 1 finished product, laser mark it, register and file it into the warehouse to ensure the traceability of the parts.

[0082] The implementation principle of a grinding device and processing technology for screw processing in an embodiment of the present application is as follows: the grinding device in the present application as a whole is coordinated through the feeding shaft 3, the first drive component 5, and the second drive component 6, and can effectively adapt to the complex shape of the tooth side surface (multi-cylindrical envelope surface) of the screw 1 of the single-screw compressor, realize efficient and automated grinding and milling of the screw 1, remove excess material from the contour of the special-shaped spiral groove 12 of the screw 1, reduce the subjective deviation caused by manual grinding, thereby improving the screw processing accuracy of the single-screw compressor, ensuring the surface roughness of the screw 1, making the dimensional tolerance and form and position tolerance of the screw 1 meet the requirements of the drawing, and improving the processing efficiency.

[0083] Unless otherwise defined, the technical or scientific terms used in this application shall have the usual meanings understood by persons of ordinary skill in the field to which this application belongs. The words "first", "second", "third" and similar terms used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "one" or "a" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprises" cover the elements or objects listed after "include" or "comprises" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0084] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A grinding device for screw processing, characterized in that: include: A workbench (2), wherein a linear loading trough (21) for loading workpieces one by one is provided on the workbench (2), and a baffle is installed at the discharge end of the loading trough (21); A feeding shaft (3) is fixedly mounted on the workbench (2) and located on one side of the discharge end of the feeding trough (21), wherein the feeding shaft (3) is parallel to the working surface of the workbench (2), the feeding shaft (3) is perpendicular to the feeding trough (21), and an operating gap suitable for inserting a workpiece is formed between the feeding trough (21), the baffle and the feeding shaft (3); A shaft-shaped grinding tool (4) provided on one side of the feeding shaft (3) and a first drive assembly (5) for driving the grinding tool (4) into / away from any spiral groove (12) of the workpiece and driving the grinding tool (4) to rotate around the axis of the grinding tool (4); and a second drive assembly (6) for driving the workpiece to rotate around the axis of the feeding shaft (3) and to synchronously advance / retreat along the axis of the feeding shaft (3); The second driving assembly (6) comprises a sliding collar (61), a first top plate (62), a first linear driving member (63), a second top plate (64) and a second linear driving member (65); an end of the feeding shaft (3) close to the feeding trough (21) is a threaded section; The sliding collar (61) is coaxially sleeved and threadedly connected to the feeding shaft (3), the sliding collar (61) is used for coaxial sleeve of the workpiece, and one end of the sliding collar (61) away from the feeding trough (21) is provided with a limiting boss (611) protruding outward along its circumference, and the limiting boss (611) is provided with a first positioning member (612) for limiting relative rotation between the workpiece and the sliding collar (61); The first linear drive member (63) and the second linear drive member (65) are respectively located outside the two ends of the sliding collar (61), and the first top plate (62) is fixedly mounted on the output shaft end of the first linear drive member (63), and the second top plate (64) is fixedly mounted on the output shaft end of the second linear drive member (65). The first top plate (62) and the second top plate (64) are both slidably mounted on the workbench (2) along the axis of the feeding shaft (3); When the workpiece rotates along with the sliding collar (61), the grinding end of the grinding tool (4) is located in the spiral groove (12) of the workpiece, and the grinding end of the grinding tool (4) is suitable for abutting against the bottom wall / side wall surface of the spiral groove (12) of the workpiece; A first mounting seat (22) for mounting the feeding shaft (3) is fixedly provided on the workbench (2) at one end of the feeding shaft (3) away from the feeding trough (21), an elastic member (31) is provided between the second top plate (64) and the first mounting seat (22), and both ends of the elastic member (31) are fixedly mounted on the second top plate (64) and the first mounting seat (22), respectively, and the telescopic direction of the elastic member (31) is parallel to the axial direction of the feeding shaft (3); A third mounting seat (24) is fixedly provided on the workbench (2) and located on one side of the feeding shaft (3); the first driving assembly (5) comprises a ball seat (51) mounted on the third mounting seat (24), a ball head (52) rotatably connected to the ball seat (51), a steering control component (53) for driving the ball head (52) to rotate in the ball seat (51), and a driving motor (54) for driving the grinding tool (4) to rotate, wherein the driving motor (54) is fixedly mounted on the ball head (52); and the grinding tool (4) is coaxially fixed to the end of the output shaft of the driving motor (54) and passes through the center of the ball head (52); The third mounting seat (24) is provided with a sliding seat (241) for adjusting the distance between the ball seat (51) and the third mounting seat (24) and a third linear drive member (242). The sliding seat (241) is slidably connected to the third mounting seat (24) in a direction perpendicular to the feeding shaft (3). The grinding tool (4) and the first drive assembly (5) are both mounted on the sliding seat (241).

2. The grinding device for screw processing according to claim 1, characterized in that: The first positioning member (612) is a positioning protrusion, and there are multiple positioning protrusions. The multiple positioning protrusions are distributed in a ring array around the feeding shaft (3), and the positioning protrusions are plug-fitted into the balancing holes (11) on the workpiece.

3. The grinding device for screw processing according to claim 1, characterized in that: The steering control component (53) includes a plurality of driving cylinders (531) evenly distributed around the ball seat (51), one end of the driving cylinder (531) is hinged to the sliding seat (241), and the other end passes through the ball seat (51) and is hinged to the ball head (52).

4. The grinding device for screw processing according to claim 1, characterized in that: The workbench (2) is further provided with a rotation adjustment component (7) for rotating the workpiece by ß degrees along the circumferential direction of the feeding shaft (3) after a spiral groove (12) on the workpiece is ground. ß degrees is the angle between two adjacent balancing holes (11) on the workpiece and the axis of the workpiece.

5. The grinding device for screw processing according to claim 4, characterized in that: A second mounting seat (23) is fixedly provided on the workbench (2) at a side of the loading trough (21) away from the loading shaft (3), and the first linear drive member (63) is fixedly mounted on the second mounting seat (23); The rotation adjustment assembly (7) includes a grab plate (71), a rotating component (72) and a reset component (73), wherein the grab plate (71) is a magnetic component, and a second positioning component (711) opposite to the first positioning component (612) is provided on the side of the grab plate (71) close to the feeding shaft (3), and the second positioning component (711) is plugged and adapted with the balance hole (11) on the workpiece, and the rotating component (72) is used to drive the grab plate (71) to rotate ß degrees along the circumferential direction of the feeding shaft (3) when the first linear driving component (63) drives the first top plate (62) to retreat outside the feeding trough (21), and the reset component (73) is used to drive the grab plate (71) to rotate minus ß degrees when the first linear driving component (63) drives the first top plate (62) to lift the workpiece toward the feeding shaft (3).

6. A screw processing process, according to a screw processing grinding device according to any one of claims 1 to 5, characterized in that: The steps include: S1: Incoming material inspection; S2: Rough turning; S3: Heat treatment; S4: Hardness test; S5: Processing inspection, correction / elimination of inferior products, correction of deformation problems of the screw (1) after heat treatment, detection of slag inclusions, pores and cracks on the screw (1), use of grinding equipment to remove excess material from the profile of the special-shaped spiral groove (12) of the screw (1), and ensure that the dimensional tolerance and form and position tolerance of the screw (1) meet the requirements of the drawing; S6: Obtain qualified screw (1) finished products.

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