Positioning tool for compressor shell machine tool machining and machining method

Abstract

The invention relates to the technical field of compressor machining, and discloses a compressor shell machine tool machining positioning tool and a machining method.The compressor shell machine tool machining positioning tool comprises a platform and a machining assembly arranged at the right end of the top face of the platform, the top face of the platform is transversely and slidably connected with a mounting table through an electric sliding rail, and a machine shell is fixedly mounted on the top face of the mounting table; a rotating disc is arranged on the right side wall of the machine shell in a penetrating mode through a bearing, and a plurality of arm rods are slidably connected to the right side face of the machine shell at equal angles in the radial direction of the machine shell. The limitation that a traditional positioning tool can only be singly fixed is thoroughly changed, the shell does not need to be disassembled for multiple times for repositioning in the machining process, meanwhile, the shell does not need to be transferred to special cleaning equipment after machining, flushing and blow-drying operation can be achieved through the same tool, the operation process is greatly simplified, the procedure switching time is shortened, and the overall machining efficiency is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of compressor machining technology, specifically to a positioning fixture and machining method for machining compressor housings. Background Technology

[0002] As a driven fluid machine that elevates low-pressure gas to high-pressure gas, the compressor is a core piece of equipment in many fields such as refrigeration systems and industrial pneumatic systems. Its casing, as a critical load-bearing and protective component, directly affects the compressor's sealing performance, operational stability, and service life. Compressor casings are typically cylindrical. During the manufacturing process of cylindrical compressor casings, they require clamping and positioning using positioning fixtures before machining on machine tools. However, existing compressor casing positioning fixtures still have certain shortcomings, such as:

[0003] The "Positioning Fixture for Compressor Housing Machining" application with application number CN202121009202.4 can only achieve fixed clamping and positioning of the compressor housing, and does not have the function of rotating and adjusting the angle. This means that if different circumferential positions of the housing need to be machined during the machining process, the housing must be disassembled and repositioned multiple times. This not only makes the operation process cumbersome, increases the intensity of manual labor, and affects the processing efficiency, but also lacks a single function and a post-machining cleaning mechanism. After the compressor housing is machined, its surface is prone to residual metal shavings, cutting fluid residue, oil stains and other impurities. If these impurities are not cleaned in time, they will affect the fitting accuracy between parts during subsequent assembly, and may even aggravate the wear of the equipment during operation, reduce the overall service life and operational reliability of the compressor, and bring many inconveniences to subsequent production processes.

[0004] In view of this, and in response to the above problems, we conducted in-depth research and proposed a positioning fixture and machining method for machining the compressor housing. Summary of the Invention

[0005] The purpose of this invention is to provide a positioning fixture and machining method for processing compressor housings on a machine tool, so as to solve the problems mentioned in the background art that the existing positioning fixtures cannot rotate to adjust the angle and have limited functions.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a positioning fixture for machining a compressor housing, comprising a platform and a machining component disposed on the right end of its top surface;

[0007] The top surface of the platform is connected to an installation platform via an electric slide rail, and a housing is fixedly installed on the top surface of the installation platform. A turntable is provided through the right side wall of the housing via a bearing, and multiple arms are slidably connected at equal angles along the radial direction of the right side of the housing. A positioning clamp is fixedly installed at the right end of each arm.

[0008] The housing is provided with a push mechanism for arm movement, a drive mechanism for turntable rotation, and an infeed / outfeed mechanism inside the housing. The infeed / outfeed mechanism is connected to a conveying mechanism on the push mechanism. The infeed / outfeed mechanism is connected to a reciprocating mechanism on the housing, and the reciprocating mechanism is connected to the drive mechanism via a one-way transmission mechanism.

[0009] The above technical solution facilitates the integrated operation of clamping and positioning the compressor housing, adjusting the angle rotation, and cleaning after processing. Through the coordinated cooperation of multiple mechanisms, it solves the problems of cumbersome positioning and single function of traditional tooling, and greatly improves processing efficiency and processing quality.

[0010] As a preferred embodiment of the present invention, the pushing mechanism includes a hydraulic cylinder fixedly installed on the left side of the housing. The output shaft of the hydraulic cylinder movably penetrates the right side wall of the housing, and a movable plate is fixedly installed at the end of the output shaft of the hydraulic cylinder. A push-pull rod is provided through the movable plate via a bearing, and the push-pull rod slides through the center of the turntable. A connecting seat is fixedly installed at the right end of the push-pull rod, and the connecting seat is rotatably connected to one end of the connecting rod, and the other end of the connecting rod is rotatably connected to the inner side of the arm.

[0011] The above technical solution facilitates the axial movement of the push-pull rod driven by the hydraulic cylinder, and the use of the connecting rod to drive multiple arms to extend and retract synchronously in the radial direction, thereby achieving rapid clamping and release of the cylindrical compressor housing.

[0012] As a preferred embodiment of the present invention, the driving mechanism includes a motor fixedly installed on the left side of the housing. The output shaft of the motor is keyed to a rotating rod, which passes through the left side wall of the housing via a bearing. A driving gear is coaxially fixedly installed on the right end of the rotating rod, and a gear ring meshes with the bottom of the driving gear. The gear ring is fixedly installed on the left side of the turntable, and the axis of the gear ring is collinear with the axis of the turntable.

[0013] The above technical solution facilitates the rotation of the rotating rod driven by the motor, which in turn drives the turntable to rotate through the meshing transmission of the drive gear and the gear ring. This allows for the adjustment of the circumferential angle of the compressor housing after positioning, eliminating the need for disassembly and repositioning to complete the processing of different circumferential positions of the housing. This simplifies the operation process and reduces the intensity of manual labor.

[0014] As a preferred embodiment of the present invention, the ratio of the number of teeth of the drive gear to the number of teeth of the gear ring is 1:8.

[0015] The above technical solution facilitates speed reduction and labor-saving transmission, reduces motor load, and improves service life and operational stability.

[0016] As a preferred embodiment of the present invention, the feeding and discharging mechanism includes a cylinder fixedly installed on the inner wall of the left side of the machine housing. A sliding rod is slidably installed through the right side wall of the cylinder, and a piston adapted to the cylinder is fixedly installed at the left end of the sliding rod. Feed pipes are fixedly installed through the left and right ends of the side wall of the cylinder, and a one-way feed valve is provided on the feed pipe. A suction pipe is fixedly connected to the end of the feed pipe, and the suction pipe is fixedly installed through the left side wall of the machine housing. A water inlet pipe and an air inlet pipe are fixedly connected to the upper and lower ends of the left side of the feed pipe, respectively, and a solenoid valve is provided on both the water inlet pipe and the air inlet pipe. A discharge pipe is fixedly installed through the left and right ends of the bottom of the cylinder, and a one-way discharge valve is provided on the discharge pipe. A conveying pipe is fixedly connected to the end of the discharge pipe.

[0017] The above technical solution facilitates the intake and pushing of materials through the reciprocating movement of the piston. The water inlet pipe or air inlet pipe can be switched on and off by a solenoid valve according to processing requirements, so as to deliver clean water for rinsing impurities or deliver hot air for blowing impurities and drying the compressor casing.

[0018] As a preferred embodiment of the present invention, the material conveying mechanism includes a corrugated telescopic pipe fixedly connected to the end of the material conveying pipe, a connecting pipe fixedly connected to the right end of the corrugated telescopic pipe, and the connecting pipe being fixedly installed on the output shaft of the hydraulic cylinder via a straight rod. The right end of the connecting pipe is connected to a through pipe via a rotary sealing joint, and the through pipe is fixedly inserted through the center of the push-pull rod. The right end surface of the through pipe is fixedly connected to one end of multiple hoses, and the other end of the hoses is fixedly connected to a nozzle fixedly installed on the inner side of the arm.

[0019] By adopting the above technical solution, clean water or air can be effectively guided to the surface of the compressor housing. The corrugated telescopic pipe can be adapted to the movement of the hydraulic cylinder output shaft. The rotary sealing joint ensures that the material conveying is not affected when the pipe rotates with the turntable. Multiple sets of nozzles are distributed along the arm to achieve all-round, dead-angle-free cleaning and drying of the housing surface, effectively removing metal shavings, cutting fluid residue and oil stains, and improving the cleanliness of the housing surface.

[0020] As a preferred embodiment of the present invention, the reciprocating moving mechanism includes a fixed plate fixedly installed on the top surface of the cylinder. A reciprocating lead screw is provided through the fixed plate via a bearing, and the left end of the reciprocating lead screw is connected to the left inner wall of the housing via a bearing. A movable plate is sleeved on the outer side of the reciprocating lead screw, and the left side of the movable plate is fixedly connected to the right end of the slide rod. The rotation of the reciprocating lead screw is used for the reciprocating linear movement of the movable plate.

[0021] By adopting the above technical solution, the rotational motion of the reciprocating screw can be converted into the reciprocating linear motion of the movable plate, thereby driving the slide bar and piston to move back and forth synchronously. This provides stable power for the material intake and pushing of the feeding and discharging mechanism, ensuring a continuous and uniform supply of clean water or hot air, and guaranteeing the cleaning and drying effect.

[0022] As a preferred embodiment of the present invention, the one-way transmission mechanism includes a hollow tube mounted on the inner wall of the left side of the housing via a bearing, and a driven gear is fixedly mounted on the outer wall of the hollow tube. The driven gear meshes with a driving gear fixedly mounted on the surface of the rotating rod. The hollow tube is located outside the reciprocating screw, and the axis of the hollow tube is collinear with the axis of the reciprocating screw. A ratchet is fixedly mounted on the surface of the reciprocating screw, and the ratchet is located inside the hollow tube. The ratchet meshes with a pawl connected to the inner wall of the hollow tube via a torsion spring.

[0023] The above technical solution facilitates the power linkage between the drive mechanism and the reciprocating movement mechanism. Only when the rotating rod rotates in the reverse direction, the reciprocating screw is driven to rotate through the engagement of the ratchet and pawl, thereby triggering the feeding and discharging mechanism to work. When the turntable rotates in the forward direction (processing angle adjustment), the pawl disengages from the ratchet, and the reciprocating screw stops rotating, avoiding ineffective actions and improving the coordination of the collaborative work of each mechanism.

[0024] A machining method for compressor housing is disclosed, which involves fixing the compressor housing using a movable clamping and positioning structure, flexibly adjusting the circumferential machining angle of the compressor housing according to machining needs, and cleaning the housing after machining is completed.

[0025] Compared with the prior art, the beneficial effects of the present invention are: the positioning fixture for machining the compressor housing integrates clamping and positioning, circumferential angle adjustment, and post-processing cleaning and drying functions into one, completely changing the limitation of traditional positioning fixtures that can only be fixed in one way. During the processing, there is no need to disassemble the housing and reposition it multiple times. At the same time, there is no need to transfer it to a special cleaning equipment after processing. The rinsing and drying operations can be achieved through the same fixture, which greatly simplifies the operation process, reduces the process changeover time, and significantly improves the overall processing efficiency.

[0026] 1. The hydraulic cylinder drives the push-pull rod to move axially, and the connecting rod drives multiple arms to extend and retract radially synchronously, which can quickly achieve the clamping and loosening of cylindrical compressor housings of different specifications, ensuring stable and effective positioning of the compressor housing;

[0027] 2. By driving the rotating rod with a motor and through the coordinated transmission of the drive gear and the gear ring, the circumferential angle of the compressor housing can be freely adjusted after positioning. The processing of different circumferential positions of the housing can be completed without manual disassembly and re-clamping, effectively reducing the amount of manual operation and labor intensity.

[0028] 3. The system can switch between water rinsing and hot air blowing modes as needed. Multiple nozzles are distributed along the arm, and combined with the lateral movement of the mounting platform and the rotation of the turntable, it can perform all-round, no-dead-angle cleaning of the compressor housing surface, effectively removing metal shavings, cutting fluid residue and oil stains. The hot air blowing function can quickly dry the housing surface, avoiding the impact of impurities on subsequent assembly accuracy, reducing wear during equipment operation, extending the compressor's service life and operational reliability, and improving the overall product quality. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the left side view of the present invention;

[0030] Figure 2 This is a schematic diagram of the right-side view of the present invention;

[0031] Figure 3 This is a schematic diagram of the cross-sectional structure of the housing of the present invention;

[0032] Figure 4 This is a schematic diagram of the connection structure between the turntable and the boom of the present invention;

[0033] Figure 5 This is a schematic diagram of the connection structure between the drive gear and the gear ring of the present invention;

[0034] Figure 6 This is a schematic diagram of the connection structure between the fixing plate, the cylinder, and the reciprocating lead screw of the present invention;

[0035] Figure 7 This is a schematic diagram of the ratchet and pawl connection structure of the present invention;

[0036] Figure 8 This is a schematic diagram of the cross-sectional structure of the cylindrical body of the present invention;

[0037] Figure 9 This is a schematic diagram of the cross-sectional connection structure between the push-pull rod and the through pipe of the present invention.

[0038] In the diagram: 1. Platform; 2. Processing component; 3. Mounting platform; 4. Housing; 5. Turntable; 6. Arm; 7. Positioning clamp; 8. Hydraulic cylinder; 9. Moving plate; 10. Push-pull rod; 11. Connecting seat; 12. Connecting rod; 13. Motor; 14. Rotating rod; 15. Drive gear; 16. Gear ring; 17. Cylinder; 18. Slide rod; 19. Piston; 20. Feed pipe; 21. Extraction pipe; 22. Water inlet pipe; 23. Air inlet pipe; 24. Discharge pipe; 25. Conveying pipe; 26. Corrugated telescopic pipe; 27. Connecting pipe; 28. Straight rod; 29. ​​Through pipe; 30. Hose; 31. Nozzle; 32. Fixed plate; 33. Reciprocating screw; 34. Moving plate; 35. Hollow tube; 36. Driven gear; 37. Drive gear; 38. Ratchet; 39. Pawl. Detailed Implementation

[0039] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0040] Please see Figure 1 - Figure 9 The technical solution of this invention is as follows: A positioning fixture for machining a compressor housing includes a platform 1 and a machining component 2 disposed on the right end of its top surface. A PLC controller for controlling various electrical devices is provided on the platform 1. A mounting table 3 is slidably connected to the top surface of the platform 1 via an electric slide rail, and a housing 4 is fixedly mounted on the top surface of the mounting table 3. A turntable 5 is provided through the right side wall of the housing 4 via a bearing, and multiple arms 6 are slidably connected at equal angles along the radial direction of the right side of the housing 4. A positioning clamp 7 is fixedly mounted on the right end of the arms 6. A pushing mechanism for moving the arms 6 is provided on the housing 4, and a driving mechanism for rotating the turntable 5 is provided on the housing 4. A feeding and discharging mechanism is provided inside the housing 4, and the feeding and discharging mechanism is connected to a conveying mechanism disposed on the pushing mechanism. The feeding and discharging mechanism is connected to a reciprocating moving mechanism disposed on the housing 4, and the reciprocating moving mechanism is connected to the driving mechanism via a one-way transmission mechanism.

[0041] The pushing mechanism includes a hydraulic cylinder 8 fixedly installed on the left side of the housing 4. The output shaft of the hydraulic cylinder 8 movably passes through the right side wall of the housing 4, and a movable plate 9 is fixedly installed at the end of the output shaft of the hydraulic cylinder 8. A push-pull rod 10 is provided through the movable plate 9 via a bearing, and the push-pull rod 10 slides through the center of the turntable 5. A connecting seat 11 is fixedly installed at the right end of the push-pull rod 10, and the connecting seat 11 is rotatably connected to one end of the connecting rod 12, and the other end of the connecting rod 12 is rotatably connected to the inner side of the arm 6.

[0042] The drive mechanism includes a motor 13 fixedly mounted on the left side of the housing 4. The output shaft of the motor 13 is keyed to a rotating rod 14, which passes through the left side wall of the housing 4 via a bearing. A drive gear 15 is coaxially fixedly mounted on the right end of the rotating rod 14, and a gear ring 16 meshes with the bottom of the drive gear 15. The gear ring 16 is fixedly mounted on the left side of the turntable 5, and the axis of the gear ring 16 is collinear with the axis of the turntable 5. The ratio of the number of teeth of the drive gear 15 to the number of teeth of the gear ring 16 is 1:8.

[0043] The feeding and discharging mechanism includes a cylinder 17 fixedly installed on the inner left side wall of the housing 4. A slide rod 18 is slidably installed through the right side wall of the cylinder 17, and a piston 19 adapted to the cylinder 17 is fixedly installed at the left end of the slide rod 18. Feed pipes 20 are fixedly installed through both ends of the side wall of the cylinder 17, and a one-way feed valve is installed on the feed pipe 20. A suction pipe 21 is fixedly connected to the end of the feed pipe 20, and the suction pipe 21 is fixedly installed through the left side wall of the housing 4. Water inlet pipe 22 and air inlet pipe 23 are fixedly connected at the upper and lower ends of the left side, respectively. Solenoid valves are installed on both water inlet pipe 22 and air inlet pipe 23. Water inlet pipe 22 is connected to an external water supply device. Air inlet pipe 23 is equipped with a filter screen and an electric heating wire inside for filtering and heating the drawn-in gas. Discharge pipe 24 is fixedly connected to the left and right ends of the bottom of the cylinder 17. One-way discharge valve is installed on discharge pipe 24. A conveying pipe 25 is fixedly connected to the end of discharge pipe 24.

[0044] The material conveying mechanism includes a material conveying pipe 25 with a corrugated telescopic pipe 26 fixedly connected to its end. The right end of the corrugated telescopic pipe 26 is fixedly connected to a connecting pipe 27, and the connecting pipe 27 is fixedly installed on the output shaft of the hydraulic cylinder 8 via a straight rod 28. The right end of the connecting pipe 27 is connected to a through pipe 29 via a rotary sealing joint, and the through pipe 29 is fixedly connected through the center of the push-pull rod 10. The right end surface of the through pipe 29 is fixedly connected to one end of multiple hoses 30, and the other end of the hoses 30 is fixedly connected to a nozzle 31 fixedly installed on the inner side of the arm 6.

[0045] The reciprocating movement mechanism includes a fixed plate 32 fixedly installed on the top surface of the cylinder 17. A reciprocating screw 33 is provided through the fixed plate 32 via a bearing. The left end of the reciprocating screw 33 is connected to the left inner wall of the housing 4 via a bearing. A movable plate 34 is sleeved on the outside of the reciprocating screw 33. The left side of the movable plate 34 is fixedly connected to the right end of the slide rod 18. The rotation of the reciprocating screw 33 is used for the reciprocating linear movement of the movable plate 34.

[0046] The one-way transmission mechanism includes a hollow tube 35 mounted on the inner wall of the left side of the housing 4 via a bearing, and a driven gear 36 is fixedly mounted on the outer wall of the hollow tube 35. The driven gear 36 meshes with a driving gear 37 fixedly mounted on the surface of the rotating rod 14. The hollow tube 35 is located outside the reciprocating screw 33, and the axis of the hollow tube 35 is collinear with the axis of the reciprocating screw 33. A ratchet 38 is fixedly mounted on the surface of the reciprocating screw 33, and the ratchet 38 is located inside the hollow tube 35. The ratchet 38 meshes with a pawl 39 connected to the inner wall of the hollow tube 35 via a torsion spring.

[0047] Working principle: When in use, the compressor housing to be processed is placed between multiple positioning clamping blocks 7 by an external robotic arm. The hydraulic cylinder 8 is started. The output shaft of the hydraulic cylinder 8 drives the moving plate 9, the push-pull rod 10 and the connecting seat 11 to move to the left. The connecting seat 11 drives multiple arms 6 to move radially inward along the housing 4 synchronously through the connecting rod 12 until the positioning clamping block 7 is tightly attached to the outer wall of the compressor housing, thus completing the clamping and positioning.

[0048] By controlling the electric slide rail, the mounting platform 3 and the positioned compressor housing are moved towards the processing assembly 2, and the processing assembly 2 is started to process the compressor housing;

[0049] When it is necessary to adjust the circumferential machining angle of the compressor housing, start the motor 13 to rotate forward. The motor 13 drives the rotating rod 14 and the drive gear 15 to rotate. The drive gear 15 meshes with the gear ring 16 to drive the turntable 5, the arm 6 and the compressor housing to rotate synchronously, so as to achieve angle adjustment without disassembly and repositioning.

[0050] After processing, if it is necessary to clean the surface of the compressor housing, use an external robotic arm to grip the compressor housing. By controlling the output shaft of the hydraulic cylinder 8 to extend, the positioning clamp 7 is driven to release the compressor housing and remain between the positioning clamp 7. Subsequently, by controlling the solenoid valve on the water inlet pipe 22 to open and the solenoid valve on the air inlet pipe 23 to close, the motor 13 is started to reverse. The rotating rod 14 drives the drive gear 37 to rotate. The drive gear 37 meshes with the driven gear 36 to drive the hollow tube 35 to rotate. The pawl 39 inside the hollow tube 35 meshes with the ratchet 38, driving the reciprocating screw. Rotating rod 33 drives reciprocating screw 33 to move movable plate 34, slide rod 18 and piston 19 back and forth inside cylinder 17. During the reciprocating movement of piston 19, external cleaning water is drawn into cylinder 17 through water inlet pipe 22 and feed pipe 20. Subsequently, the cleaning water is sprayed out from nozzle 31 through discharge pipe 24, conveying pipe 25, corrugated telescopic pipe 26, connecting pipe 27, through pipe 29 and hose 30 to rinse the surface of compressor housing. At the same time, the electric slide rail drives the mounting platform 3 and the positioned compressor housing to move left and right to achieve a comprehensive rinsing and cleaning of the compressor housing surface.

[0051] After rinsing, close the solenoid valve on the water inlet pipe 22 and open the solenoid valve on the air inlet pipe 23. The electric heating wire in the air inlet pipe 23 works to heat the gas. The motor 13 continues to reverse, and the piston 19 moves back and forth to draw in the heated gas and push it to the nozzle 31 to spray it out, thus cleaning and drying the surface of the compressor housing.

[0052] A machining method for compressor housing is disclosed, which involves fixing the compressor housing using a movable clamping and positioning structure, flexibly adjusting the circumferential machining angle of the compressor housing according to machining needs, and cleaning the housing after machining is completed.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A positioning fixture for machining a compressor housing, comprising a platform (1) and a machining component (2) disposed on the right end of its top surface, characterized in that: The top surface of the platform (1) is connected to the mounting platform (3) by a sliding electric slide rail, and the top surface of the mounting platform (3) is fixedly installed with a housing (4). The right side wall of the housing (4) is provided with a turntable (5) through a bearing, and multiple arms (6) are slidably connected at equal angles along the radial direction of the right side of the housing (4). The right end of the arms (6) is fixedly installed with a positioning clamp (7). The housing (4) is provided with a push mechanism for moving the arm (6), and the housing (4) is provided with a drive mechanism for rotating the turntable (5). The housing (4) is provided with an infeed and discharge mechanism, which is connected to a conveying mechanism provided on the push mechanism. The infeed and discharge mechanism is connected to a reciprocating moving mechanism provided on the housing (4), and the reciprocating moving mechanism is connected to the drive mechanism through a one-way transmission mechanism.

2. The positioning fixture for machining a compressor housing according to claim 1, characterized in that, The pushing mechanism includes a hydraulic cylinder (8) fixedly installed on the left side of the housing (4). The output shaft of the hydraulic cylinder (8) moves through the right side wall of the housing (4), and a movable plate (9) is fixedly installed at the end of the output shaft of the hydraulic cylinder (8). A push-pull rod (10) is provided through the movable plate (9) via a bearing, and the push-pull rod (10) slides through the center of the turntable (5). A connecting seat (11) is fixedly installed at the right end of the push-pull rod (10), and the connecting seat (11) is rotatably connected to one end of the connecting rod (12), and the other end of the connecting rod (12) is rotatably connected to the inner side of the arm (6).

3. The positioning fixture for machining a compressor housing according to claim 2, characterized in that, The drive mechanism includes a motor (13) fixedly installed on the left side of the housing (4). The output shaft of the motor (13) is keyed to a rotating rod (14), and the rotating rod (14) passes through the left side wall of the housing (4) through a bearing. The right end of the rotating rod (14) is coaxially fixedly installed with a drive gear (15), and the bottom of the drive gear (15) is meshed with a gear ring (16). The gear ring (16) is fixedly installed on the left side of the turntable (5), and the axis of the gear ring (16) is collinear with the axis of the turntable (5).

4. The positioning fixture for machining a compressor housing according to claim 3, characterized in that, The ratio of the number of teeth of the drive gear (15) to the number of teeth of the gear ring (16) is 1:

8.

5. The positioning fixture for machining a compressor housing according to claim 3, characterized in that, The feeding and discharging mechanism includes a cylinder (17) fixedly installed on the inner wall of the left side of the housing (4). A slide rod (18) is slidably provided through the right side wall of the cylinder (17), and a piston (19) adapted to the cylinder (17) is fixedly installed at the left end of the slide rod (18). Feed pipes (20) are fixedly provided through the left and right ends of the side wall of the cylinder (17), and a one-way feed valve is provided on the feed pipe (20). A suction pipe (21) is fixedly connected to the end of the feed pipe (20). The feed pipe (21) is fixedly installed through the left side wall of the casing (4). The upper and lower ends of the feed pipe (20) are respectively fixedly connected to the water inlet pipe (22) and the air inlet pipe (23). Solenoid valves are provided on both the water inlet pipe (22) and the air inlet pipe (23). The left and right ends of the bottom of the cylinder (17) are fixedly connected to the discharge pipe (24). A one-way discharge valve is provided on the discharge pipe (24). The end of the discharge pipe (24) is fixedly connected to the conveying pipe (25).

6. The positioning fixture for machining a compressor housing according to claim 5, characterized in that, The material conveying mechanism includes a material conveying pipe (25) with a corrugated telescopic pipe (26) fixedly connected to the end. The right end of the corrugated telescopic pipe (26) is fixedly connected to a connecting pipe (27), and the connecting pipe (27) is fixedly installed on the output shaft of the hydraulic cylinder (8) through a straight rod (28). The right end of the connecting pipe (27) is connected to a through pipe (29) through a rotary sealing joint, and the through pipe (29) is fixedly connected through the center of the push-pull rod (10). The right end surface of the through pipe (29) is fixedly connected to one end of multiple hoses (30), and the other end of the hoses (30) is fixedly connected to a nozzle (31) fixedly installed on the inner side of the arm (6).

7. The positioning fixture for machining a compressor housing according to claim 5, characterized in that, The reciprocating moving mechanism includes a fixed plate (32) fixedly installed on the top surface of the cylinder (17). A reciprocating screw (33) is provided through the fixed plate (32) via a bearing. The left end of the reciprocating screw (33) is connected to the left inner wall of the housing (4) via a bearing. A movable plate (34) is sleeved on the outside of the reciprocating screw (33). The left side of the movable plate (34) is fixedly connected to the right end of the slide rod (18). The rotation of the reciprocating screw (33) is used for the reciprocating linear movement of the movable plate (34).

8. The positioning fixture for machining a compressor housing according to claim 7, characterized in that, The one-way transmission mechanism includes a hollow tube (35) mounted on the inner wall of the left side of the housing (4) via a bearing, and a driven gear (36) is fixedly mounted on the outer wall of the hollow tube (35), and the driven gear (36) meshes with a driving gear (37) fixedly mounted on the surface of the rotating rod (14). The hollow tube (35) is located outside the reciprocating screw (33), and the axis of the hollow tube (35) is collinear with the axis of the reciprocating screw (33). A ratchet (38) is fixedly mounted on the surface of the reciprocating screw (33), and the ratchet (38) is located inside the hollow tube (35), and the ratchet (38) meshes with a pawl (39) connected to the inner wall of the hollow tube (35) via a torsion spring.

9. A machining method for processing a compressor housing on a machine tool, characterized in that, The compressor housing is fixed by a movable clamping and positioning structure. The circumferential machining angle of the compressor housing can be flexibly adjusted according to the machining requirements, and the housing is cleaned after machining is completed.

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