A compressor cylinder sliding vane groove and inner hole compound processing grinding machine and a processing method thereof

Abstract

The application discloses a compressor cylinder sliding vane groove and inner hole compound machining grinding machine and a machining method thereof; the grinding machine comprises a bed body component, a cross slide component, a Z-axis feeding component, a clamping assembly, an inner circular grinding finishing spindle component, an inner circular grinding spindle component, a tailstock centering component, a Y-axis column feeding component and a groove grinding spindle and probe component; through the cooperative operation of the components, the workpiece inner hole centering, sliding vane groove angle detection compensation, sliding vane groove water static pressure precision grinding, inner hole oscillation grinding and grinding wheel online finishing can be sequentially completed under one clamping condition. The application can eliminate error accumulation caused by multiple clamping, improve machining precision and production efficiency, reduce process routes and equipment investment, realize independent controllability of core machining equipment and adapt to mass high-precision production requirements of the compressor industry.

Description

Technical Field

[0001] This invention relates to the field of machining, and in particular to a grinding machine for combined machining of compressor cylinder vane groove and inner hole, and its machining method. Background Technology

[0002] Compressor cylinders are core components in air conditioning and refrigeration equipment. The machining accuracy of their vane grooves and inner bores directly determines the compressor's energy efficiency ratio, sealing performance, and operational reliability. As downstream OEMs continuously raise energy efficiency standards, the manufacturing requirements for cylinder parts are becoming increasingly stringent. The dimensional tolerances of the vane grooves need to be controlled within the micrometer range (0.002~0.004mm), and the positional accuracy (such as parallelism and perpendicularity) between the vane grooves and the inner bores requires extremely high precision. Furthermore, mass production models impose strict limitations on the machining cycle time.

[0003] Traditional compressor cylinder precision machining processes typically consist of multiple independent steps, including rough grinding of the end face, fine grinding of the end face, boring of the inner hole, honing of the inner hole, broaching or fine grinding of the vane groove, and polishing and deburring. A complete machining production line requires at least six different types of machining equipment. This not only results in high total equipment investment costs and a large factory area occupied by the production line, but also requires frequent transfer of workpieces and repeated clamping and positioning between each process. The large number of auxiliary processes significantly reduces the overall production cycle time, making it difficult to meet the stringent requirements for machining efficiency in the large-scale mass production of the compressor industry.

[0004] In terms of machining accuracy and quality control, traditional machining methods involve independently clamping and machining the vane groove and inner hole in different equipment and processes. Both use the cylinder end face as the machining datum. However, the positioning errors generated by multiple clamping operations accumulate, making it difficult to reliably guarantee key dimensional and positional tolerances such as parallelism between the vane groove and the inner hole. Meanwhile, existing vane groove machining often employs conventional processes such as broaching, milling, and planing. The dimensional tolerances of the machined vane groove typically only reach 0.025mm to 0.04mm, with limited perpendicularity accuracy. Furthermore, the groove wall machining is prone to tool-joint steps, resulting in insufficient continuity and surface flatness. This makes it difficult to meet the high-precision fitting requirements of high-speed reciprocating vane motion in high-end compressors, thus limiting further improvements in compressor sealing performance and operational reliability.

[0005] Currently, there is no mature equipment solution in the industry capable of simultaneously completing the precision grinding of cylinder vane grooves and inner holes under a single clamping condition. Although some foreign manufacturers' specialized processing equipment can achieve a certain degree of integrated processing, the equipment is expensive, and the supply cycle and technical services are constrained by overseas manufacturers. This not only significantly increases the equipment procurement and maintenance costs of domestic manufacturers, but also poses potential risks to the stability and security of the industrial chain and supply chain, failing to meet the development needs of the domestic compressor manufacturing industry for independent control of key equipment. Overall, existing compressor cylinder processing technology and equipment cannot simultaneously meet the dual requirements of high precision and high efficiency. There are many technical bottlenecks, such as lengthy process routes, accumulated clamping errors, unstable processing quality, and high equipment costs, which have become important factors restricting the upgrading of compressor component manufacturing technology and the improvement of the industry's core competitiveness. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a composite grinding machine for machining the vane groove and inner hole of a compressor cylinder and its machining method, which can simultaneously complete the precision grinding of the vane groove and the inner hole in one clamping, greatly improving the machining accuracy and efficiency, and significantly reducing equipment investment and production costs.

[0007] The technical solution adopted by this invention to solve its technical problem is: A grinding machine for compound machining of compressor cylinder vane grooves and internal holes, and its machining method, are provided. The machine includes: a bed assembly, a cross slide assembly, a Z-axis feed assembly, a clamping assembly, an internal grinding dressing spindle assembly, an internal grinding spindle assembly, a tailstock centering assembly, a Y-axis column feed assembly, and a groove grinding spindle and probe assembly. The cross slide assembly is slidably mounted on the upper left region of the bed assembly via linear guides. The Z-axis feed assembly is fixedly mounted on the bed assembly, and its output end is connected to the cross slide assembly, enabling it to drive the cross slide assembly to reciprocate along the Z-axis. The clamping assembly and the internal grinding dressing spindle assembly are both fixedly mounted on the cross slide assembly. The clamping assembly can clamp the cylinder workpiece and rotate or lock it in position. The internal grinding spindle assembly and the Y-axis column feed assembly are respectively arranged on both sides of the upper right area of ​​the bed assembly. The tailstock centering assembly is fixedly arranged on the bed assembly between the internal grinding spindle assembly and the Y-axis column feed assembly, and can center the cylinder workpiece's inner hole. The groove grinding spindle and the probe assembly are fixedly installed on the Y-axis column feed assembly and can reciprocate along the Y-axis direction with the Y-axis column feed assembly to complete the online dimensional detection and grinding of the cylinder workpiece's sliding groove.

[0008] Preferably, the bed component includes a rectangular symmetrical base and a fixed seat located on the upper right of the base. The base has a grid-like rib plate inside and multiple adjusting pads are evenly arranged at its bottom. The cross slide component is slidably arranged on the upper left of the base via four linear guides. The internal grinding spindle component, the Y-axis column feed component, and the tailstock centering component are all correspondingly arranged on the fixed seat. Adjusting top blocks are provided at both ends of the fixed seat. The adjusting top blocks can finely adjust the position of the internal grinding spindle component and the Y-axis column feed component on the fixed seat.

[0009] Preferably, the cross slide assembly includes a slide base, a worktable, and a linear motor. The slide base is slidably mounted on a base via four linear rails. The worktable is slidably mounted on the slide base via two slide rails and can be driven by the linear motor to reciprocate along the X-axis. Stops are correspondingly provided at both ends of the slide rails, and a limit seat is provided between the ends of the two slide rails. The limit seat can mechanically limit the extreme positions of the worktable's movement. An oil collection box is also correspondingly provided at the ends of the slide rails. A long grating ruler is provided on one side of the slide base of the worktable, and the long grating ruler and the reading head provided on the slide base form a closed-loop control. Short side blocks and long side blocks are respectively provided on both sides of the upper surface of the worktable. The short side blocks and long side blocks can adjust the position of the spindle assembly on the worktable using a fine-tuning clamping assembly and an internal grinding mill.

[0010] Preferably, the clamping assembly includes a spindle housing, a workpiece spindle, a torque motor, and two sets of rotary cylinders. The workpiece spindle is rotatably mounted in the spindle housing, with its middle section directly driven by the torque motor and its tail section equipped with a grating encoder and a brake. The brake is used to lock the workpiece spindle during sliding groove grinding. The rotary cylinders are symmetrically arranged on both sides of the front end of the workpiece spindle and can clamp the cylinder workpiece at four points through a floating adapter structure. A hydraulic slip ring is also provided at the tail end of the workpiece spindle for continuously supplying oil to the front rotary cylinders.

[0011] Preferably, the Z-axis feed component includes a motor base, a servo motor, a coupling, a lead screw, and a lead screw nut. The servo motor is fixed to the base via the motor base and is connected to the lead screw via the coupling. The two ends of the lead screw are rotatably supported in the motor base and the support base respectively by lead screw bearings. The inner ring of the lead screw bearing is axially limited by a locking nut, and the outer ring is axially fixed by a cover plate. The lead screw nut is sleeved on the lead screw and fixedly connected to the slide base. Buffer blocks are provided at the front and rear limit positions of the lead screw.

[0012] Preferably, the Y-axis column feed component includes a column frame, a Y-axis lead screw, a servo drive unit, and a lifting slide plate. The column frame is vertically mounted on a fixed base. The Y-axis lead screw is rotatably mounted in the column frame, and both its upper and lower ends are supported by ball screw support units. The servo drive unit is directly connected to the Y-axis lead screw via a diaphragm coupling. The lifting slide plate is slidably mounted on the column frame via a guide rail and is driven to move up and down along the Y-axis by the nut of the Y-axis lead screw. A smooth operation cylinder is provided at the top of the column frame, and its piston rod is connected to the lifting slide plate via a floating joint to balance the lifting slide plate and the upper load.

[0013] Preferably, the groove grinding spindle and probe assembly includes a groove grinding spindle seat, a groove grinding electric spindle, a probe assembly, and a groove grinding wheel. The groove grinding spindle seat is fixed on a lifting slide plate, and the probe assembly is fixed to the bottom of the groove grinding spindle seat and can detect the size and angle deviation of the cylinder workpiece slide groove. The groove grinding electric spindle is fixed inside the groove grinding spindle seat and drives the groove grinding wheel to rotate through a transmission mechanism. Hydrostatic chambers are provided on both sides of the groove grinding wheel. The filtered grinding fluid flows through the hydrostatic chambers, forming hydrostatic support on both sides of the groove grinding wheel and simultaneously playing a grinding cooling role.

[0014] Preferably, the tailstock centering component includes a tailstock base plate, a mandrel cylinder, a centering mandrel, movable support blocks, and a positioning copper sleeve. The tailstock base plate is fixed on a fixed seat, the mandrel cylinder is fixed to the front end of the tailstock base plate, and the centering mandrel is slidably disposed in the gripper base and driven axially by the mandrel cylinder. The front end of the centering mandrel has a double conical surface, and three movable support blocks are circumferentially distributed at the front end of the centering mandrel and cooperate with the double conical surface. When the centering mandrel moves axially, the movable support blocks can be pushed out radially synchronously to tighten the inner hole of the cylinder workpiece. The positioning copper sleeve is sleeved on the outside of the gripper base and serves as the axial positioning bearing surface of the cylinder workpiece. A positioning block and an insert are provided below the gripper base. The positioning block and the insert can be used for coarse positioning of the cylinder workpiece sliding groove.

[0015] Preferably, both the internal grinding spindle assembly and the internal grinding dressing spindle assembly adopt an electric spindle structure. The electric spindle of the internal grinding spindle assembly is equipped with an internal grinding wheel at its front end, with a maximum speed of 24,000 RPM. The electric spindle of the internal grinding dressing spindle assembly is equipped with a diamond roller at its front end.

[0016] A method for combined machining of compressor cylinder vane groove and inner hole, using a grinding machine for combined machining of compressor cylinder vane groove and inner hole as described above, includes the following steps: S1. Coarse positioning during loading: The clamping assembly moves along the negative X-axis to the loading position, and after the cylinder workpiece is loaded, the corner cylinder rotates to clamp the workpiece, completing the coarse positioning. S2. Tailstock fine centering: The clamping assembly moves along the positive X-axis to a position coaxial with the tailstock centering component, and then moves along the negative Z-axis to make the cylinder workpiece approach the positioning copper sleeve. The spindle cylinder drives the movable support block to repeatedly clamp the inner hole of the workpiece three times. At the same time, the corner cylinder releases the clamp three times. After the fine centering of the inner hole of the workpiece is completed, the clamping assembly returns to the safe position. S3, Angle Measurement and Compensation: The clamping assembly moves to the measurement station, the probe assembly of the slot grinding spindle and the probe component detects the angle deviation of the sliding groove, and the system controls the workpiece spindle to rotate to compensate for the angle deviation and complete the angle alignment of the sliding groove. S4. Sliding groove grinding: The clamping assembly moves to the groove grinding station, the filtered grinding fluid is introduced, and the groove grinding wheel feeds along the Z-axis according to the preset program to complete the rough grinding and fine grinding of the two sides of the sliding groove in sequence. After the processing is completed, it returns to the safe position. S5. Internal grinding: The clamping assembly moves to the internal grinding station, and the internal grinding wheel performs oscillating grinding on the inner hole of the cylinder workpiece. After the processing is completed, it returns to the safe position. S6. Grinding wheel dressing: When the inner grinding wheel is deformed, move the inner grinding wheel to align with the diamond roller of the inner grinding dressing spindle component, and start the inner grinding dressing spindle component to complete the dressing of the inner grinding wheel. S7. Unloading: The clamping assembly returns to the loading position, the corner cylinder releases the workpiece, and the processed cylinder workpiece is taken out.

[0017] The beneficial effects of this invention are: This invention provides a composite grinding machine and method for machining the vane groove and inner hole of a compressor cylinder. By organically integrating the bed component, cross slide component, Z-axis feed component, clamping assembly, internal grinding dressing spindle component, internal grinding spindle component, tailstock centering component, Y-axis column feed component, and groove grinding spindle and probe component into one unit, it achieves precision grinding of the vane groove and inner hole of the cylinder workpiece in a single clamping operation on a single machine. This fundamentally solves the technical problems of long process routes, large equipment investment, error accumulation due to multiple clamping operations, and difficulty in balancing accuracy and efficiency in traditional processes. Furthermore, through the closed-loop control of the linear motor of the cross slide component with a long grating ruler, the servo motor of the Z-axis feed component directly connected to the lead screw with a pre-tensioning structure, and the servo motor of the Y-axis column feed component... Closed-loop control of the grating ruler and smooth operation of the cylinder unloading significantly improve the high responsiveness and high positioning accuracy of each motion axis, ensuring the stability of the grinding process. Hydrostatic chambers are set on both sides of the groove grinding wheel, using filtered grinding fluid to form hydrostatic support and simultaneously cool the grinding area, greatly improving the grinding quality and dimensional accuracy of the sliding groove. Combined with a micron-level probe assembly, online detection and angular deviation compensation of the sliding groove and inner hole are achieved, further ensuring the consistency of machining accuracy. The clamping assembly uses a torque motor direct drive, a time encoder for precise feedback, and a brake for locking and positioning. Combined with the cylinder-driven internal expansion centering mechanism of the tailstock centering component, high-precision workpiece clamping and centering are achieved. The internal grinding dressing spindle assembly enables online dressing of the internal grinding wheel, ensuring continuous accuracy in internal hole grinding. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of a grinding machine for combined machining of compressor cylinder slide groove and inner hole according to Embodiment 1 of the present invention.

[0019] Figure 2 This is a top view of a grinding machine for combined machining of compressor cylinder vane groove and inner hole according to Embodiment 1 of the present invention.

[0020] Figure 3 This is a schematic diagram of the bed component of Embodiment 1 of the present invention.

[0021] Figure 4 This is a schematic diagram of the cross slide component of Embodiment 1 of the present invention.

[0022] Figure 5 This is a cross-sectional view of the clamping assembly according to Embodiment 1 of the present invention.

[0023] Figure 6 This is a cross-sectional view of the Z-axis feed component of Embodiment 1 of the present invention.

[0024] Figure 7 This is a schematic diagram of the Y-axis column feed component of Embodiment 1 of the present invention.

[0025] Figure 8 This is a schematic diagram of the structure of the groove grinding spindle and probe component in Embodiment 1 of the present invention.

[0026] Figure 9 This is a cross-sectional structural schematic diagram of the tailstock centering component of Embodiment 1 of the present invention.

[0027] In the diagram: 1. Bed assembly; 101. Base; 102. Fixed seat; 103. Linear guide rail; 104. Adjusting top block; 105. Adjusting shim; 2. Cross slide assembly; 201. Slide base; 202. Worktable; 203. Linear motor; 204. Stop block; 205. Limit seat; 206. Oil receiving box; 207. Long grating ruler; 208. Short side top block; 209. Long side top block; 210. Slide rail; 3. Clamping assembly; 301. Spindle box; 302. Workpiece spindle; 303. Torque motor; 304. Angle cylinder; 305. Time encoder; 306. Brake; 307. Floating adapter structure; 308. Hydraulic slip ring; 4. Z-axis feed assembly; 401. Motor base; 402. Servo motor; 403. Linkage 404. Shaft assembly; 405. Drive screw; 406. Screw nut; 407. Support base; 408. Screw bearing; 409. Buffer block; 5. Internal grinding dressing spindle assembly; 6. Internal grinding spindle assembly; 7. Tailstock centering assembly; 701. Tailstock base plate; 702. Mandrel cylinder; 703. Centering mandrel; 704. Movable support block; 705. Positioning copper sleeve; 706. Gripper base; 707. Positioning block; 708. Insert plate; 8. Y-axis column feed assembly; 801. Column frame; 802. Y-axis screw; 803. Servo drive unit; 804. Lifting slide plate; 805. Guide rail; 9. Groove grinding spindle and probe assembly; 901. Groove grinding spindle seat; 902. Groove grinding electric spindle; 903. Probe assembly; 904. Groove grinding wheel.

[0028] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1 like Figure 1 and 2As shown, a composite grinding machine for machining the vane groove and inner hole of a compressor cylinder includes: a bed component 1, a cross slide component 2, a Z-axis feed component 4, a clamping assembly 3, an internal grinding dressing spindle component 5, an internal grinding spindle component 6, a tailstock centering component 7, a Y-axis column feed component 8, and a groove grinding spindle and probe component 9; the cross slide component 2 is slidably mounted on the upper left region of the bed component 1 via a linear guide 103; the Z-axis feed component 4 is fixedly mounted on the bed component 1, and its output end is connected to the cross slide component 2, enabling it to drive the cross slide component 2 to reciprocate along the Z-axis direction; the clamping assembly 3 and the internal grinding dressing spindle component 5 are both fixedly mounted on the cross slide component. The clamping assembly 3 can clamp the cylinder workpiece and rotate or lock it in position. The internal grinding spindle assembly 6 and the Y-axis column feed assembly 8 are respectively arranged on both sides of the upper right area of ​​the bed assembly 1. The tailstock centering assembly 7 is fixedly arranged on the bed assembly 1 between the internal grinding spindle assembly 6 and the Y-axis column feed assembly 8, and can center the cylinder workpiece in the inner hole. The groove grinding spindle and the probe assembly 9 are fixedly installed on the Y-axis column feed assembly 8, and can reciprocate along the Y-axis direction with the Y-axis column feed assembly 8 to complete the online dimensional detection and grinding of the cylinder workpiece slide groove.

[0031] It should be noted that the bed component 1, as the overall load-bearing foundation, provides a stable mounting reference and vibration resistance for each component through its rectangular symmetrical structure and high rigidity layout. The cross slide component 2 is slidably mounted on the upper left area of ​​the bed via the linear guide 103. It can move along the X-axis, thereby driving the clamping assembly 3 and the internal grinding dressing spindle component 5 fixed on it to quickly switch between different machining positions. The Z-axis feed component 4 is fixed to the bed and its output end is connected to the cross slide component 2. By driving the cross slide to reciprocate along the Z-axis, it realizes the precise feed motion of the workpiece relative to the grinding wheel in the depth direction. The clamping assembly 3 can reliably clamp the cylinder workpiece and drive it to rotate at a preset angle to complete angle compensation and circumferential grinding of the inner hole. It can also lock and position the workpiece to ensure its posture during the grinding of the sliding groove. Stable, the internal grinding spindle assembly 6 and the Y-axis column feed assembly 8 are respectively located on both sides of the upper right area of ​​the bed, so that the groove grinding and internal grinding processing units do not interfere with each other and can work independently. The tailstock centering assembly 7 is located on the bed assembly 1 between the internal grinding spindle assembly 6 and the Y-axis column feed assembly 8. By centering the inner hole of the cylinder workpiece, it cooperates with the clamping assembly 3 to achieve high-precision positioning and clamping of the workpiece, eliminating the positioning error caused by multiple clamping. The groove grinding spindle and the probe assembly 9 are mounted on the Y-axis column feed assembly 8 and can reciprocate along the Y-axis. This movement stroke allows it to align with the sliding groove position to complete online dimensional inspection and precision grinding. Thus, all processing elements work together in one station under one clamping condition to achieve composite precision machining of the sliding groove and the inner hole.

[0032] Furthermore, such as Figure 3 As shown, the bed component 1 includes a rectangular symmetrical base 101 and a fixed seat 102 located on the upper right of the base 101. The base 101 has a grid-like rib plate inside, and multiple adjusting pads 105 are evenly arranged at its bottom. The cross slide component 2 is slidably arranged on the upper left of the base 101 via four linear guides 103. The internal grinding spindle component 6, the Y-axis column feed component 8, and the tailstock centering component 7 are all correspondingly arranged on the fixed seat 102. Adjusting top blocks 104 are provided at both ends of the fixed seat 102. The adjusting top blocks 104 can finely adjust the positions of the internal grinding spindle component 6 and the Y-axis column feed component 8 on the fixed seat 102.

[0033] It should be noted that the rectangular symmetrical base 101 serves as the core load-bearing structure of the entire machine. The symmetrical structure effectively reduces the impact of thermal deformation during operation on its geometric accuracy, providing a stable reference platform for all moving parts. The internal ribs of the base 101 enhance its structural rigidity, suppress structural deformation caused by grinding vibration, and ensure the dynamic and static stability of the machine tool. Multiple evenly spaced adjusting shims 105 at the bottom of the base 101 support the weight of the entire machine and adjust its levelness, ensuring even force distribution and preventing localized deformation, thus guaranteeing the accuracy of the machine's mounting reference. Four linear guides 103 arranged on the upper left of the base 101 provide support for the cross slide component 2. High-precision sliding guides and supports ensure the straightness and smooth operation of the cross slide's reciprocating motion. The fixed seat 102, located on the upper right of the base 101, is used to integrate and install the internal grinding spindle component 6, the Y-axis column feed component 8, and the tailstock centering component 7, realizing modular assembly of functional modules, reducing the machining complexity of the base 101, and facilitating independent debugging and maintenance of each functional component. The adjusting top blocks 104 at both ends of the fixed seat 102 can finely adjust the installation position of the internal grinding spindle component 6 and the Y-axis column feed component 8, correcting positional deviations caused by component assembly, ensuring the relative positional accuracy of the internal hole grinding axis, the groove grinding feed axis, and the workpiece rotation center, and ensuring the machining form and position tolerances of the workpiece.

[0034] Furthermore, such as Figure 4As shown, the cross slide component 2 includes a slide base 201, a worktable 202, and a linear motor 203. The slide base 201 is slidably mounted on the base 101 via four linear rails 103. The worktable 202 is slidably mounted on the slide base 201 via two slide rails 210 and can be driven by the linear motor 203 to reciprocate along the X-axis. Stops 204 are correspondingly provided at both ends of the slide rails 210, and a limiting seat 205 is provided between the ends of the two slide rails 210. The limiting seat 205 can mechanically limit the worktable 2. 02. The extreme positions of operation; an oil receiving box 206 is also provided on the end of the slide rail 210; a long grating ruler 207 is provided on the slide base 201 on one side of the worktable 202, and the long grating ruler 207 and the reading head provided on the slide base 201 form a closed loop control; a short side top block 208 and a long side top block 209 are respectively provided on both sides of the upper surface of the worktable 202, and the short side top block 208 and the long side top block 209 can be adjusted by the fine-tuning clamping assembly 3 and the internal grinding dressing spindle assembly 5 on the worktable 202.

[0035] It should be noted that the slide base 201, as the supporting body of the cross slide component 2, is slidably mounted on the base 101 via four linear rails 103. The symmetrically distributed linear rails 103 provide stable Z-axis sliding guidance and rigid support for the slide base 201, ensuring uniform force and no eccentric deformation when the slide base 201 moves along the Z-axis, and ensuring the smooth operation of the Z-axis feed. The worktable 202 is slidably mounted on the slide base 201 via two slide rails 210 and is directly driven by a linear motor 203 to reciprocate along the X-axis. The direct drive structure has a short transmission chain and fast response speed, enabling rapid switching of workpieces between various processing stations. The stops 204 at both ends of the slide rails 210 can initially limit the sliding stroke of the worktable 202 to prevent the slider from overtraveling and dislodging from the slide rails 210. The limit seats 205 between the ends of the two slide rails 210 can limit the extreme positions of the worktable 202. The system features mechanical hard limit switches and double limit protection to prevent the worktable 202 from overtraveling and colliding with surrounding components. An oil collection box 206 at the end of the slide rail 210 can collect lubricating media dripping from the slide rail 210, maintaining its lubrication while keeping the equipment environment clean. A long optical grating ruler 207, positioned between the worktable 202 and the slide base 201, works in conjunction with a reading head to form an X-axis closed-loop control system. This system provides real-time feedback on the actual position of the worktable 202, accurately corrects feed errors, and ensures the positioning accuracy of X-axis position switching. Short side blocks 208 and long side blocks 209, located on both sides of the upper surface of the worktable 202, can fine-tune the installation positions of the clamping assembly 3 and the internal grinding spindle assembly 5 on the worktable 202, correcting positional deviations caused by component assembly and ensuring the relative positional accuracy of both components with respect to the workpiece's rotation center, providing a positional reference for subsequent high-precision machining.

[0036] Furthermore, such as Figure 5 As shown, the clamping assembly 3 includes a spindle housing 301, a workpiece spindle 302, a torque motor 303, and two sets of rotary cylinders 304. The workpiece spindle 302 is rotatably mounted inside the spindle housing 301. Its middle part is directly driven by the torque motor 303, and its tail is equipped with a grid encoder 305 and a brake 306. The brake 306 is used to lock the workpiece spindle 302 during sliding groove grinding. The rotary cylinders 304 are symmetrically arranged on both sides of the front end of the workpiece spindle 302 and can clamp the cylinder workpiece at four points through a floating transition structure 307. The tail end of the workpiece spindle 302 is also equipped with a hydraulic slip ring 308 for continuously supplying oil to the front rotary cylinders 304.

[0037] It should be noted that the spindle housing 301, as the overall load-bearing base of the clamping assembly 3, provides a rigid mounting reference and protective space for the workpiece spindle 302 and its supporting components, ensuring the reference accuracy of the spindle rotation. The workpiece spindle 302, rotatably mounted within the spindle housing 301, is the core carrier that supports the cylinder workpiece and drives its rotation, providing a stable rotation center for the workpiece. The torque motor 303, located in the middle of the workpiece spindle 302, uses a direct-drive structure to drive the workpiece spindle 302 to rotate, eliminating intermediate transmission links, resulting in small transmission errors and the ability to output low-speed, high-torque output. This allows for precise control of the workpiece's rotation angle, adapting to the rotation requirements of internal hole grinding and sliding groove angle compensation. The time encoder 305 located at the tail of the workpiece spindle 302 can detect and provide feedback on the rotation angle and position of the workpiece spindle 302 in real time, achieving closed-loop precise control of the rotational motion, providing accuracy for the angle... Deviation compensation and indexing provide precise positional reference; brake 306 is used to lock the workpiece spindle 302 during sliding groove grinding, eliminating circumferential movement of the workpiece during grinding, ensuring the workpiece position is stable during sliding groove grinding, and ensuring the straightness and flatness of the groove wall processing; two sets of corner cylinders 304 are symmetrically arranged on both sides of the front end of the workpiece spindle 302, and realize four-point clamping of the cylinder workpiece through floating adapter structure 307. The floating structure can adaptively conform to the workpiece surface, so that the clamping force is evenly distributed, avoiding workpiece clamping deformation, and ensuring the coaxiality of the workpiece and the spindle; the hydraulic slip ring 308 set at the tail of the workpiece spindle 302 can stably supply hydraulic oil to the corner cylinder 304 at the front end when the workpiece spindle 302 is continuously rotating, avoiding the hydraulic pipeline from getting tangled with the spindle rotation, and ensuring that the clamping cylinder works continuously and reliably during the workpiece rotation process.

[0038] Furthermore, such as Figure 6As shown, the Z-axis feed component 4 includes a motor base 401, a servo motor 402, a coupling 403, a lead screw 404, and a lead screw nut 405. The servo motor 402 is fixed to the base 101 via the motor base 401 and is connected to the lead screw 404 via the coupling 403. The two ends of the lead screw 404 are rotatably supported in the motor base 401 and the support base 406 respectively via lead screw bearings 407. The inner ring of the lead screw bearing 407 is axially limited by a locking nut, and the outer ring is axially fixed by a cover plate. The lead screw nut 405 is sleeved on the lead screw 404 and is fixedly connected to the slide base 201. Buffer blocks 408 are provided at the front and rear limit positions of the lead screw 404.

[0039] It should be noted that the motor mount 401 is fixed to the base 101 with bolts, providing stable mounting support for the servo motor 402 and ensuring that the motor axis is coaxial with the lead screw axis. The servo motor 402, as the power source, transmits its output torque directly to the transmission lead screw 404 via the coupling 403. This direct connection eliminates backlash and lag caused by belt or gear transmissions, ensuring the response speed and transmission accuracy of the feed motion. The coupling 403 connects the motor shaft and the lead screw shaft, compensating for minor coaxiality deviations between them and avoiding additional loads caused by rigid connections. The two ends of the transmission lead screw 404 are rotatably supported in the motor mount 401 and the support base 406 respectively via lead screw bearings 407, forming a double-end support structure, allowing the lead screw to withstand axial loads. The screw maintains stable rotational accuracy and bending rigidity under cutting force and radial load. The inner ring of the lead screw bearing 407 is axially limited by a locking nut, and the outer ring is axially fixed by a cover plate. The inner and outer rings are reliably axially constrained to prevent axial movement of the bearing during screw rotation and loading, ensuring the axial position of the lead screw is fixed. The lead screw nut 405 is sleeved on the lead screw and fixedly connected to the slide table 201, converting the rotational motion of the lead screw into the linear feed motion of the slide table 201, realizing the precise displacement of the cross slide table along the Z-axis. The buffer blocks 408, which are set at the front and rear limit positions of the transmission lead screw 404, play a buffering and limiting role when the slide table 201 runs to the end of the stroke, preventing damage to the lead screw, bearing, or guide rail 805 due to overtravel collision.

[0040] Furthermore, such as Figure 7As shown, the Y-axis column feed component 8 includes a column frame 801, a Y-axis lead screw 802, a servo drive unit 803, and a lifting slide plate 804. The column frame 801 is vertically mounted on the fixed base 102. The Y-axis lead screw 802 is rotatably mounted inside the column frame 801, and its upper and lower ends are supported by ball screw support units. The servo drive unit 803 is directly connected to the Y-axis lead screw 802 through a diaphragm coupling. The lifting slide plate 804 is slidably mounted on the column frame 801 through a guide rail 805, and is driven to move up and down along the Y-axis by the nut of the Y-axis lead screw 802. The top of the column frame 801 is equipped with a stable operation cylinder, whose piston rod is connected to the lifting slide plate 804 through a floating joint, which is used to balance the lifting slide plate 804 and the upper load.

[0041] It should be noted that the column frame 801, as the overall load-bearing base of the Y-axis feed system, provides a rigid mounting reference for the internal transmission components and external sliding components, ensuring the verticality and structural stability of the Y-axis feed direction. The Y-axis lead screw 802 is rotatably mounted inside the column frame 801, serving as the transmission core for linear feed. It converts rotary motion into linear motion, providing Y-axis feed power to the lifting slide plate 804. The ball screw support units at the upper and lower ends of the lead screw provide high-precision rotary support for the Y-axis lead screw 802, while bearing radial and axial loads, ensuring the coaxiality and smooth operation of the lead screw rotation, and providing a support foundation for the lead screw pre-tensioning to compensate for thermal deformation. The servo drive unit 803 is directly connected to the Y-axis lead screw 802 through a diaphragm coupling, eliminating the intermediate reduction mechanism to shorten the transmission chain and reduce transmission costs. To compensate for minor installation coaxiality deviations, the diaphragm coupling ensures high responsiveness and precision of the feed. The lifting slide plate 804 is slidably mounted on the column frame 801 via the linear guide 103 and is driven to rise and fall along the Y-axis by the nut of the Y-axis lead screw 802. The linear guide 103 provides high-precision linear guidance for the slide plate, limits lateral clearance, and ensures the straightness and smoothness of the lifting motion. The smooth operation cylinder set at the top of the column frame 801 has its piston rod connected to the lifting slide plate 804 via a floating joint. This balances the overall weight of the lifting slide plate 804 and its upper load, significantly reducing the axial load on the Y-axis lead screw 802, reducing lead screw deformation caused by the load, and improving transmission smoothness and positioning accuracy. The floating joint can counteract the additional force caused by installation eccentricity and avoid interference with the linear motion of the slide plate.

[0042] Furthermore, such as Figure 8As shown, the groove grinding spindle and probe assembly 9 includes a groove grinding spindle seat 901, a groove grinding electric spindle 902, a probe assembly 903, and a groove grinding wheel 904. The groove grinding spindle seat 901 is fixed on the lifting slide plate 804. The probe assembly 903 is fixed to the bottom of the groove grinding spindle seat 901 and can detect the size and angle deviation of the cylinder workpiece slide groove. The groove grinding electric spindle 902 is fixed inside the groove grinding spindle seat 901 and drives the groove grinding wheel 904 to rotate through the transmission mechanism. Hydrostatic chambers are provided on both sides of the groove grinding wheel 904. The filtered grinding fluid flows through the hydrostatic chambers, forming hydrostatic support on both sides of the groove grinding wheel 904 and simultaneously playing a grinding cooling role.

[0043] It should be noted that the slot mill spindle seat 901 is fixed on the lifting slide plate 804, serving as the load-bearing base of the entire unit. It synchronously completes the Y-axis feed and position adjustment with the lifting slide plate 804. The probe assembly 903 is fixed at the bottom of the slot mill spindle seat 901, which can detect the size and angle deviation of the slide groove before processing and feed it back to the control system, providing a precise basis for workpiece angle compensation and grinding feed adjustment. The slot mill electric spindle 902 is fixed inside the slot mill spindle seat 901, and transmits power to the slot mill grinding wheel 904 through the transmission mechanism, driving the grinding wheel to rotate at high speed to achieve cutting processing of the slide groove. The hydrostatic chambers set on both sides of the slot mill grinding wheel 904 can form uniform hydrostatic support on both sides of the grinding wheel when the filtered grinding fluid flows through the chamber, suppressing grinding wheel vibration. At the same time, the grinding fluid directly cools the grinding area, effectively improving the flatness and surface quality of the slot wall processing.

[0044] Furthermore, such as Figure 9 As shown, the tailstock centering component 7 includes a tailstock base plate 701, a spindle cylinder 702, a centering spindle 703, movable support blocks 704, and a positioning copper sleeve 705. The tailstock base plate 701 is fixed on the fixed seat 102. The spindle cylinder 702 is fixed to the front end of the tailstock base plate 701. The centering spindle 703 is slidably disposed in the gripper base 706 and is driven to move axially by the spindle cylinder 702. The front end of the centering spindle 703 is provided with a double conical surface and three movable support blocks. The 704 is circumferentially distributed at the front end of the centering spindle 703 and mates with the double conical surface. When the centering spindle 703 moves axially, the movable support block 704 is pushed out radially synchronously to tighten the inner hole of the cylinder workpiece. The positioning copper sleeve 705 is sleeved on the outside of the gripper base 706 and serves as the axial positioning bearing surface of the cylinder workpiece. The gripper base 706 is provided with a positioning block 707 and an insert 708 below it. The positioning block 707 and the insert 708 can be used for coarse positioning of the cylinder workpiece sliding groove.

[0045] It should be noted that the tailstock base plate 701 is fixed on the fixed seat 102, providing a rigid installation reference for the entire mechanism; the spindle cylinder 702 drives the centering spindle 703 to move axially, and the double conical surface at the front end of the centering spindle 703, together with three circumferentially distributed movable support blocks 704, converts the axial power into radial synchronous support force, tightening the inner hole of the workpiece to ensure that the workpiece is coaxial with the spindle; the positioning copper sleeve 705 is sleeved on the outside of the gripper base 706, serving as the bearing surface for axial positioning of the workpiece, and working with the rear spring to achieve engagement buffering and reset; the positioning block 707 and insert 708 below the gripper base 706 can perform circumferential coarse positioning of the workpiece sliding groove, completing the initial alignment of the workpiece.

[0046] Furthermore, both the internal grinding spindle component 6 and the internal grinding dressing spindle component 5 adopt an electric spindle structure. The electric spindle of the internal grinding spindle component 6 is equipped with an internal grinding wheel at the front end, with a maximum speed of 24,000 RPM. The electric spindle of the internal grinding dressing spindle component 5 is equipped with a diamond roller at the front end.

[0047] It should be noted that both the internal grinding spindle assembly 6 and the internal grinding dressing spindle assembly 5 adopt an electric spindle structure, which is compact, has high rotational accuracy, and runs smoothly. It eliminates intermediate transmission links to reduce transmission errors and provides stable and controllable rotational power for machining and dressing. The electric spindle of the internal grinding spindle assembly 6 is equipped with an internal grinding wheel at the front end, which can rotate at high speed with the spindle to perform precision cutting and grinding on the inner hole of the cylinder workpiece, ensuring the dimensional accuracy and surface quality of the inner hole. The electric spindle of the internal grinding dressing spindle assembly 5 is equipped with a diamond roller at the front end, which can perform online dressing of the profile of the internal grinding wheel with the rotation of the spindle, correct the wear and deformation of the grinding wheel, maintain the cutting profile accuracy of the grinding wheel, and ensure the continuous machining accuracy of the inner hole grinding without disassembling the machine.

[0048] This embodiment describes the working principle and usage of a composite grinding machine for machining the vane groove and inner bore of a compressor cylinder: This embodiment provides a composite grinding machine for machining the vane groove and inner hole of a compressor cylinder. The bed component 1 serves as the basic support for the entire machine, and its rectangular symmetrical structure and internal grid-like ribs provide a high-rigidity mounting reference for each component. The cross slide component 2 is slidably mounted on the bed via four linear guides 103. The clamping assembly 3 and the internal grinding dressing spindle component 5 are both fixed on the worktable 202 of the cross slide component 2. The Z-axis feed component 4 drives the cross slide to move along the Z-axis direction, realizing precise feeding of the workpiece in the grinding depth direction. At the same time, the worktable 202 moves along the X-axis direction under the drive of the linear motor 203. The machine moves back and forth, enabling the clamping assembly 3 to quickly switch between different machining stations. The internal grinding spindle assembly 6 and the Y-axis column feed assembly 8, installed in the upper right area of ​​the bed, are respectively arranged on both sides. The groove grinding spindle and probe assembly 9 are fixedly installed on the lifting slide plate 804 of the Y-axis column feed assembly 8. The Y-axis lead screw 802 is driven by the servo motor 402 to achieve precise lifting and lowering along the Y-axis direction. The tailstock centering assembly 7 is fixed on the bed assembly 1 between the two. The clamping assembly 3 clamps the workpiece through two corner cylinders 304 at the front end of its workpiece spindle 302 and is driven by the torque motor 303. The workpiece spindle 302 rotates as needed, completing the indexing rotation for angle compensation and internal hole grinding. Simultaneously, the brake 306 at the tail locks the workpiece spindle 302 during groove grinding to ensure the workpiece's posture is fixed. This, combined with the time encoder 305, achieves closed-loop control of the rotation angle. The groove grinding wheel 904 rotates at high speed under the drive of the electric spindle. Filtered grinding fluid is introduced into the hydrostatic chambers on both sides of the wheel to form hydrostatic support, suppressing radial runout of the wheel and simultaneously providing grinding cooling. The internal grinding spindle assembly 6 and the internal grinding dressing spindle assembly 5 work independently. The internal grinding wheel performs oscillatory grinding on the workpiece's inner hole. The grinding wheel is dressed online when the grinding wheel wears out; the probe assembly 903 detects the angle and size deviation of the sliding groove before processing and feeds it back to the control system, which controls the rotation of the workpiece spindle 302 to complete the angle compensation; the tailstock centering component 7 drives the centering spindle 703 to move axially through the spindle cylinder 702, so that the three movable support blocks 704 are pushed out radially synchronously to tighten the inner hole of the workpiece to achieve high-precision centering. After the workpiece is coarsely positioned, it completes centering, measurement compensation, groove grinding and inner hole grinding in sequence, so that the components work together to complete the composite precision machining of the sliding groove and the inner hole under one clamping condition.

[0049] When using this compressor cylinder sliding vane groove and inner hole composite machining grinding machine, first move the workpiece spindle 302 and the fixture assembly rapidly along the negative X-axis to the loading position on the operating side, so that the cylinder sliding vane groove clearance groove of the fixture faces downward. Manually load the cylinder workpiece, match and align the workpiece rough positioning pin hole with the corresponding pin, and after the groove is aligned, the personnel leave, close and lock the front safety door, and use the two corner cylinders 304 to rotate 90 degrees to clamp the workpiece to complete the rough positioning; then, move the workpiece spindle 302 and the fixture assembly rapidly along the positive X-axis to the position coaxial with the tailstock centering component 7, and first move it rapidly along the negative Z-axis to the position near the copper sleeve. Then, the workpiece is moved slowly towards the negative Z-axis by merging the copper sleeve. The movement stops after the proximity switch is triggered by the induction plate on the copper sleeve. Simultaneously, the spindle cylinder 702 repeatedly moves the three movable blocks to clamp the workpiece's inner hole three times, while the corner cylinder 304 simultaneously releases the clamp three times. Finally, the movable blocks retract to clamp the inner hole, completing centering. The workpiece spindle 302 and the fixture assembly return to a safe position along the positive Z-axis. Then, the workpiece spindle 302 and the fixture assembly move along the negative X-axis to the probe assembly 903. The groove grinding spindle and the probe assembly 9 move along the Y-axis, measuring two to three points on each side wall of the sliding groove and calculating the vertical angle deviation. After measurement, the workpiece spindle retracts. In the safe position, the system controls the workpiece spindle 302 and the fixture to rotate the workpiece and compensate for the angle based on the measurement data, thus completing the alignment of the sliding groove angle. Then, the workpiece spindle 302 and the fixture move along the negative X-axis to the groove grinding wheel 904, the groove grinding fluid is turned on for cooling, and the machine feeds along the negative Z-axis according to a preset program. The groove grinding wheel 904 sequentially performs roughing and finishing on both sides of the sliding groove. After machining, the grinding fluid is turned off and the machine returns to the safe position along the positive Z-axis. Next, the workpiece spindle 302 and the fixture move along the positive X-axis to the internal grinding spindle assembly 6, the internal grinding fluid is turned on for cooling, and the internal grinding wheel feeds according to a preset program. The program performs oscillatory grinding on the inner hole of the workpiece. After the machining is completed, the grinding fluid is turned off and the workpiece is returned to a safe position along the positive Z-axis. After the machining is completed, the workpiece spindle 302 and the fixture assembly move along the negative X-axis to the vicinity of the safety door on the operating side. The corner cylinder 304 rotates 90 degrees to release the workpiece, unlocks and opens the front safety door, and then takes out the workpiece, thus completing the single workpiece machining process. After batch machining is completed, the probe assembly 903 can be started separately to detect the sliding groove and inner hole size to check the machining quality. When the inner grinding wheel is worn or deformed or the process requirements are adjusted, the inner grinding wheel can be dressed online by the diamond roller of the inner grinding dressing spindle assembly 5.

[0050] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

[0051] In the description of this invention, it should be understood that the terms "upper", "lower", "upper end", "lower end", "upper surface", "lower surface", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0052] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A grinding machine for combined machining of compressor cylinder vane groove and inner hole, characterized in that, include: The machine bed assembly (1), cross slide assembly (2), Z-axis feed assembly (4), clamping assembly (3), internal grinding dressing spindle assembly (5), internal grinding spindle assembly (6), tailstock centering assembly (7), Y-axis column feed assembly (8), and groove grinding spindle and probe assembly (9); the cross slide assembly (2) is slidably mounted on the upper left area of ​​the machine bed assembly (1) via a linear guide (103), the Z-axis feed assembly (4) is fixedly mounted on the machine bed assembly (1), and its output end is connected to the cross slide assembly (2) for transmission, and can drive the cross slide assembly (2) to reciprocate along the Z-axis direction; the clamping assembly (3) and the internal grinding dressing spindle assembly (5) are both fixedly mounted on the cross slide assembly (2), and The clamping assembly (3) can move synchronously along the X-axis with the cross slide assembly (2), and can clamp the cylinder workpiece and rotate or lock it in position; the internal grinding spindle assembly (6) and the Y-axis column feed assembly (8) are respectively arranged on both sides of the upper right area of ​​the bed assembly (1), and the tailstock centering assembly (7) is fixedly arranged on the bed assembly (1) between the internal grinding spindle assembly (6) and the Y-axis column feed assembly (8), and can center the cylinder workpiece in the inner hole; the slot grinding spindle and the probe assembly (9) are fixedly installed on the Y-axis column feed assembly (8), and can move back and forth along the Y-axis with the Y-axis column feed assembly (8) to complete the online dimension detection and grinding of the cylinder workpiece slide groove.

2. The compressor cylinder sliding vane groove and inner hole composite machining grinding machine as described in claim 1, characterized in that: The bed component (1) includes a rectangular symmetrical base (101) and a fixed seat (102) located on the upper right of the base (101). The base (101) has a grid-like rib plate inside and multiple adjusting pads (105) are evenly arranged at its bottom. The cross slide component (2) is slidably arranged on the upper left of the base (101) via four linear rails (103). The internal grinding spindle component (6), the Y-axis column feed component (8) and the tailstock centering component (7) are all correspondingly arranged on the fixed seat (102). The fixed seat (102) has adjusting top blocks (104) at both ends. The adjusting top blocks (104) can finely adjust the position of the internal grinding spindle component (6) and the Y-axis column feed component (8) on the fixed seat (102).

3. A composite grinding machine for machining the vane groove and inner hole of a compressor cylinder as described in claim 2, characterized in that: The cross slide component (2) includes a slide base (201), a worktable (202), and a linear motor (203). The slide base (201) is slidably mounted on the base (101) via four linear rails (103). The worktable (202) is slidably mounted on the slide base (201) via two slide rails (210) and can be driven by the linear motor (203) to reciprocate along the X-axis. Stops (204) are correspondingly provided at both ends of the slide rails (210), and a limiting seat (205) is provided between the ends of the two slide rails (210). The limiting seat (205) can mechanically limit the worktable (202). 02) The extreme position of operation; an oil receiving box (206) is also provided on the end of the slide rail (210); a long grating ruler (207) is provided on the slide base (201) on one side of the worktable (202), and the long grating ruler (207) and the reading head provided on the slide base (201) form a closed loop control; a short side top block (208) and a long side top block (209) are respectively provided on both sides of the upper surface of the worktable (202), and the short side top block (208) and the long side top block (209) can be adjusted by the fine adjustment clamping assembly (3) and the internal grinding dressing spindle assembly (5) on the worktable (202).

4. A composite grinding machine for machining the vane groove and inner hole of a compressor cylinder as described in claim 3, characterized in that: The clamping assembly (3) includes a spindle housing (301), a workpiece spindle (302), a torque motor (303), and two sets of rotary cylinders (304). The workpiece spindle (302) is rotatably mounted in the spindle housing (301). Its middle part is directly driven by the torque motor (303), and its tail is equipped with a grid encoder (305) and a brake (306). The brake (306) is used to lock the workpiece spindle (302) during the grinding of the sliding groove. The rotary cylinders (304) are symmetrically arranged on both sides of the front end of the workpiece spindle (302) and can clamp the cylinder workpiece at four points through a floating adapter structure (307). The tail end of the workpiece spindle (302) is also equipped with a hydraulic slip ring (308) for continuously supplying oil to the front rotary cylinders (304).

5. A composite grinding machine for machining the vane groove and inner hole of a compressor cylinder as described in claim 3, characterized in that: The Z-axis feed component (4) includes a motor base (401), a servo motor (402), a coupling (403), a lead screw (404), and a lead screw nut (405). The servo motor (402) is fixed on the base (101) through the motor base (401) and is connected to the lead screw (404) through the coupling (403). The two ends of the lead screw (404) are rotatably supported in the motor base (401) and the support base (406) respectively through lead screw bearings (407). The inner ring of the lead screw bearing (407) is axially limited by a locking nut, and the outer ring is axially fixed by a cover plate. The lead screw nut (405) is sleeved on the lead screw (404) and fixedly connected to the slide base (201). Buffer blocks (408) are provided at the front and rear limit positions of the lead screw (404).

6. A composite grinding machine for machining the vane groove and inner hole of a compressor cylinder as described in claim 2, characterized in that: The Y-axis column feed component (8) includes a column frame (801), a Y-axis lead screw (802), a servo drive unit (803), and a lifting slide plate (804). The column frame (801) is vertically mounted on a fixed base (102). The Y-axis lead screw (802) is rotatably mounted inside the column frame (801), and both its upper and lower ends are supported by ball screw support units. The servo drive unit (803) is directly connected to the Y-axis lead screw (802) through a diaphragm coupling. The lifting slide plate (804) is slidably mounted on the column frame (801) through a guide rail (805), and is driven to move up and down along the Y-axis by the nut of the Y-axis lead screw (802). The top of the column frame (801) is provided with a stable running cylinder, whose piston rod is connected to the lifting slide plate (804) through a floating joint, which is used to balance the lifting slide plate (804) and the upper load.

7. A composite grinding machine for machining the slide groove and inner hole of a compressor cylinder as described in claim 6, characterized in that: The groove grinding spindle and probe assembly (9) includes a groove grinding spindle seat (901), a groove grinding electric spindle (902), a probe assembly (903), and a groove grinding wheel (904). The groove grinding spindle seat (901) is fixed on the lifting slide plate (804). The probe assembly (903) is fixed at the bottom of the groove grinding spindle seat (901) and can detect the size and angle deviation of the cylinder workpiece slide groove. The groove grinding electric spindle (902) is fixed inside the groove grinding spindle seat (901) and drives the groove grinding wheel (904) to rotate through the transmission mechanism. Hydrostatic chambers are provided on both sides of the groove grinding wheel (904). The filtered grinding fluid flows through the hydrostatic chambers, forming hydrostatic support on both sides of the groove grinding wheel (904) and simultaneously playing a grinding cooling role.

8. A composite grinding machine for machining the vane groove and inner hole of a compressor cylinder as described in claim 2, characterized in that: The tailstock centering component (7) includes a tailstock base plate (701), a spindle cylinder (702), a centering spindle (703), a movable support block (704), and a positioning copper sleeve (705). The tailstock base plate (701) is fixed on a fixed seat (102). The spindle cylinder (702) is fixed to the front end of the tailstock base plate (701). The centering spindle (703) is slidably disposed in the gripper base (706) and driven axially by the spindle cylinder (702). The front end of the centering spindle (703) is provided with a double conical surface and three movable supports. The support blocks (704) are evenly distributed around the front end of the centering spindle (703) and cooperate with the double conical surface. When the centering spindle (703) moves axially, the movable support blocks (704) can be pushed out radially synchronously to tighten the inner hole of the cylinder workpiece. The positioning copper sleeve (705) is sleeved on the outside of the gripper base (706) as the axial positioning bearing surface of the cylinder workpiece. The gripper base (706) is provided with a positioning block (707) and a insert (708) below it. The positioning block (707) and the insert (708) can be used for coarse positioning of the cylinder workpiece sliding groove.

9. A composite grinding machine for machining the vane groove and inner hole of a compressor cylinder as described in claim 1, characterized in that: Both the internal grinding spindle component (6) and the internal grinding dressing spindle component (5) adopt an electric spindle structure. The electric spindle of the internal grinding spindle component (6) is equipped with an internal grinding wheel at the front end, with a maximum speed of 24000 RPM. The electric spindle of the internal grinding dressing spindle component (5) is equipped with a diamond roller at the front end.

10. A method for combined machining of a compressor cylinder vane groove and inner hole, using the grinding machine for combined machining of compressor cylinder vane groove and inner hole as described in any one of claims 1 to 9, characterized in that, Includes the following steps: S1. Loading and rough positioning: The clamping assembly (3) moves along the negative X-axis to the loading position, and after the cylinder workpiece is loaded, the corner cylinder (304) rotates to clamp the workpiece and completes the rough positioning. S2, Tailstock fine centering: The clamping assembly (3) moves along the positive X-axis to a position coaxial with the tailstock centering component (7), and then moves along the negative Z-axis to make the cylinder workpiece approach the positioning copper sleeve (705). The spindle cylinder (702) drives the movable support block (704) to repeatedly clamp the inner hole of the workpiece three times. At the same time, the corner cylinder (304) releases the clamp three times. After the fine centering of the inner hole of the workpiece is completed, the clamping assembly (3) returns to the safe position. S3, Angle Measurement Compensation: The clamping assembly (3) moves to the measurement station, and the probe assembly (903) of the slot grinding spindle and the probe component (9) detects the angle deviation of the sliding groove. The system controls the workpiece spindle (302) to rotate to compensate for the angle deviation and complete the angle alignment of the sliding groove. S4. Sliding groove grinding: The clamping assembly (3) moves to the groove grinding station, and the filtered grinding fluid is introduced. The groove grinding wheel (904) feeds along the Z-axis according to the preset program, and the rough grinding and fine grinding of the two sides of the sliding groove are completed in sequence. After the processing is completed, it returns to the safe position. S5. Internal grinding: The clamping assembly (3) moves to the internal grinding station, and the internal grinding wheel performs oscillating grinding on the inner hole of the cylinder workpiece. After the processing is completed, it returns to the safe position. S6. Grinding wheel dressing: When the inner grinding wheel is deformed, move the inner grinding wheel to be aligned with the diamond roller of the inner grinding dressing spindle component (5), and start the inner grinding dressing spindle component (5) to complete the dressing of the inner grinding wheel. S7. Unloading: The clamping assembly (3) returns to the loading position, the corner cylinder (304) releases the workpiece, and the processed cylinder workpiece is taken out.

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