Machining device and method for twisted-blade Roots blower impeller

Abstract

The machining device comprises a rack, a transverse moving electric rail on the top face of the rack is connected with a rail base, a rotating shaft assembly is arranged in a shell at the head end of the rail base, a transverse rail at the tail end of the rail base is slidably connected with a sliding base assembly, and a wheel shaft is connected between rotatable screw rods of the rotating shaft assembly and the sliding base assembly. A bidirectional displacement seat is arranged on one side of the rack, the top of the bidirectional displacement seat is connected with an electric turntable, the electric turntable is connected with a mechanical arm, and a cutter shaft assembly of the mechanical arm can clamp a milling cutter disc; the invention further provides a machining method of the device. The machining method comprises the steps of trepanning and positioning, end cutting and impeller machining. According to the device, the impeller and the shaft end of the impeller of the twisted-blade Roots blower can be machined in a full-automatic mode, in the machining process, the mechanical arm in the device can freely replace a proper milling cutter disc through the cutter shaft assembly, the milling cutter disc can be driven to move at multiple angles and in all directions, the machining efficiency of the impeller is greatly improved, and the device has the advantages of being automatic and efficient.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical processing equipment, and in particular to a processing device and method for a twisted-blade Roots blower impeller. Background Art

[0002] Traditional straight-blade rotor Roots blowers are known as "noise tigers" when in operation, mainly due to the violent airflow disturbances caused by their volumetric working principle and the geometric structure of the straight-blade rotor. When the high-pressure gas is released instantly at the exhaust port, a strong periodic exhaust explosion noise is generated; at the same time, at the end of the exhaust phase, the high-pressure gas flows back through the tiny gap at high speed, forming vortex and jet noise. In addition, the high-speed squeezing and expansion of the gap gas during the rotor meshing process produces high-frequency whistling, and the straight-blade design makes the airflow switching more sudden, exacerbating the pressure pulsation. These airflow pulsations not only generate high-frequency noise themselves, but also stimulate the vibration of the blower casing and pipeline, radiating low-frequency noise. Its inherent structural characteristics determine that the noise level is significantly higher than that of other types of fans.

[0003] Using twisted-lobe rotors instead of straight-lobe rotors can significantly reduce the noise of Roots blowers. However, traditional two-axis CNC planers can only process two- and three-lobe straight-lobe rotors and are unable to process twisted-lobe rotors. Machining with four-axis, two-link machine tools requires a ball-end milling cutter, which must be sharpened on a tool grinder. This process is inefficient and unfavorable for mass production of multiple models of twisted-lobe rotors. Therefore, the machining process for twisted-lobe rotors is a bottleneck limiting the widespread application of twisted-lobe Roots blowers, and a specialized machining device is needed to address this issue. Summary of the Invention

[0004] In order to solve the above problems, the present invention proposes a processing device for the impeller of a twisted-blade Roots blower, comprising a stand, a transverse electric rail on the top surface of the stand connected to a track seat, a swivel assembly built in the housing at the front end of the track seat, a transverse rail at the rear end of the track seat slidingly connected to the slide assembly, a wheel axle is connected between the swivel assembly and the rotatable screw of the slide assembly, and the transverse electric rail drives the wheel axle to move transversely under the tool block of the lifting gantry. A two-way displacement seat is provided on one side of the stand, and an electric turntable is connected to the top of the two-way displacement seat, which is connected to a robotic arm. The tool shaft assembly of the robotic arm cooperates with the milling cutter disc, and various types of milling cutters are placed in the countersunk hole of the tool holder. An electromagnet is provided on the bottom surface of the countersunk hole, and a needle-type cylinder is provided in the center of the electromagnet. The piston rod of the needle-type cylinder controls the retraction and extension of the steel balls in the tool shaft assembly, and the milling cutter disc can be locked when the steel balls are released.

[0005] Furthermore, the rotary shaft assembly includes a rotating motor, which is built into the bottom of the track seat shell. The vertical output shaft of the rotating motor is provided with a stop sleeve, which cooperates with the arc block at the output end of the stop cylinder. The stop cylinder is installed on the top surface of the shell. The top gear of the output shaft of the rotating motor is engaged with the gear of the main screw body. The main screw is rotatably connected to the horizontal sleeve at the top of the shell. The head end of the main screw is provided with a spline cap, and the threaded section at the tail end of the main screw passes through the sleeve and points to the slide assembly.

[0006] Furthermore, the slide assembly includes a sliding seat, which is slidably connected to the cross rail and fastened by bolts. The top surface of the sliding seat is rotatably connected to the roots of the two vertical screw shafts, the gear disks at the bottom of the vertical screw shaft bodies are engaged with each other, and a handwheel is provided in the middle of the outer vertical screw shaft body. The top threaded sections of the two vertical screw shafts are threadedly connected to the threaded cylinders on both sides of the cross cylinder seat, and the cylinder body of the cross cylinder seat is rotatably connected to the screw rod, and a turntable is provided from the head end of the screw rod, and the threaded section from the tail end of the screw passes through the cylinder body and points to the rotary shaft assembly.

[0007] Furthermore, the lifting gantry includes a lifting cylinder, the base of the lifting cylinder body is slidably connected to the horizontal adjustment rails on both sides of the top surface of the platform and fastened by bolts, the piston rods of the lifting cylinders on both sides are vertically connected to the two ends of the longitudinal beam, and the side of the longitudinal beam is connected to the knife block by bolts, and the knife block head faces downward, and the two sets of lifting gantries are respectively matched with the two ends of the wheel axle.

[0008] Furthermore, the cutter shaft assembly includes a milling cutter shaft, a flange on the top of the milling cutter shaft is connected to the output end of the robotic arm, a boss at the bottom of the milling cutter shaft cooperates with the center hole of the milling cutter disc, pins evenly distributed on the annular surface of the boss correspond to pin holes on the bottom surface of the groove in the center hole of the milling cutter disc, a control cavity is opened on the bottom surface of the boss, a control rod is slidably connected in the control cavity, the top of the control rod is connected to the top surface of the control cavity through a reset spring, a steel ball is embedded in a ball channel arranged around the thin end of the boss, and each ball channel is connected to the control cavity. When the control rod is in a low position, half of the steel ball is squeezed out of the ball channel and cooperates with the ball groove arranged around the wall of the center hole of the milling cutter disc. When the control rod is pushed to a high position by the piston rod of the needle cylinder, the steel ball can be completely received in the ball channel.

[0009] Furthermore, the robotic arm includes an articulated seat, the bottom of the articulated seat is connected to the electric turntable, the seat plates on both sides of the articulated seat are articulated to the spline shaft at the bottom of the lifting seat, the spline shaft is connected to the output end of the articulated seat motor, the articulated seat motor is installed on the outer side of the seat plate of the articulated seat, the guide rails on both sides of the front of the lifting seat are slidingly connected to the sliders on both sides of the back of the lifting plate, the central lifting block on the back of the lifting plate is threadedly connected to the lifting screw, the top of the lifting screw is connected to the output end of the lifting motor, the lifting motor is installed on the top surface of the lifting seat, the bottom of the lifting screw is rotatably connected to the inner bottom surface of the lifting seat, the direct drive motor is embedded in the front sleeve of the lifting plate, the output end of the direct drive motor is connected to the side joint of the power cylinder, the side joint is rotatably connected to the sleeve mouth of the cylinder, the milling cutter motor is installed on the top of the power cylinder, and the output end of the milling cutter motor is connected to the tool shaft assembly.

[0010] Furthermore, the bidirectional displacement seat includes a platform, which is connected to the middle part of the platform frame, a horizontal adjustment motor is installed on the front side of the platform, the end of the horizontal adjustment shaft of the horizontal adjustment motor is hinged to the bearing seat on the rear side of the platform, the horizontal adjustment shaft is located between the horizontal guide rails on both sides of the top surface of the platform, the horizontal guide rails are slidably connected to the sliders on both sides of the bottom surface of the suspension platform, the horizontal movement block in the middle of the bottom surface of the suspension platform is threadedly connected to the horizontal adjustment shaft, and a longitudinal adjustment motor is installed at the rear end of the suspension platform, the longitudinal adjustment shaft of the longitudinal adjustment motor extends into the longitudinal groove opened on the top surface of the suspension platform, and is rotatably connected to the end face of the longitudinal groove, the longitudinal adjustment shaft is threadedly connected to the longitudinal movement block at the bottom of the longitudinal movement plate, the sliders on both sides of the longitudinal movement plate are slidably connected to the longitudinal guide rails on both sides of the suspension platform, and an electric turntable is installed on the top surface of the longitudinal movement plate.

[0011] Furthermore, the transverse electric rail includes a transverse motor, which is installed at one end of the platform. The output end of the transverse motor is connected to the transverse screw, which is built into a transverse groove opened on the top surface of the platform. The transverse screw is rotatably connected to the two end surfaces of the transverse groove. Guide rods parallel to the transverse screw are provided on both sides of the transverse screw. The transverse screw is threadedly connected to the middle screw hole of the drive block at the bottom of the track seat, and the guide holes on both sides of the drive block are slidably connected to the guide rods.

[0012] The present invention also provides a processing method for the above-mentioned processing device, comprising the following steps: Hole drilling and positioning: drill threaded holes in the center of both end faces of the axle to be processed, fix the head end of the axle to the screw of the swivel assembly through the threaded holes, adjust the slide assembly to the appropriate position so that the threaded hole at the rear end of the axle can be tightened with the screw of the slide assembly, and then lock the slide assembly to the cross rail; End cutting: Start the swivel assembly to rotate the wheel axle, adjust the lifting gantry to the target height, make the cutter block cut the wheel axle surface, start the traverse electric rail to drive the wheel axle to move horizontally, and cooperate with the cutter block to process the wheel axle end; Impeller processing: Raise the lifting gantry to the disengaged position, lock the swivel assembly, make the wheel shaft surface to be processed face the side of the bidirectional displacement seat, move the cutter shaft assembly to the top of the target milling cutter disc and then move downward, the needle cylinder piston rod pushes out and retracts the steel ball, after the cutter shaft assembly is docked with the milling cutter disc, turn off the electromagnet, the piston rod moves downward to release the steel ball, the steel ball locks the milling cutter disc, and the robotic arm brings out the milling cutter disc to process the middle part of the wheel shaft.

[0013] The present invention has the following beneficial effects: It first positions axle blanks of varying sizes using rotatable master and slave screws in the swivel and slide assemblies; then, the axle ends are machined through the coordination of a transverse electric rail and a lifting gantry; finally, a cutter shaft assembly in a manipulator grips various milling cutters to machine the twisted-lobe rotor in the middle of the axle, thus enabling fully automated production of twisted-lobe Roots blower impellers. Driven by the manipulator, electric turntable, and bidirectional displacement seat, the cutter shaft assembly can move in all directions, significantly improving impeller machining efficiency. Its automated and efficient nature facilitates mass production of various types of twisted-lobe Roots blowers. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the top view of the structure of the present invention; Figure 3 This is a side view of the structure of the present invention after the tool holder is removed; Figure 4 This is an oblique view of the milling cutter head of the present invention when processing a wheel axle; Figure 5 This is a front view structural cross-section of the cutter shaft assembly of the present invention when clamping the milling cutter disc; Figure 6 for Figure 1 A partial enlarged view of area A in the middle.

[0015] The accompanying drawings are marked as follows: 1. Stand; 101. Horizontal adjustment rail; 102. Horizontal groove; 2. Track seat; 201. Horizontal rail; 202. Sleeve; 203. Drive block; 3. Wheel axle; 4. Cutter block; 5. Electric turntable; 6. Milling cutter disc; 601. Pin hole; 602. Ball groove; 7. Cutter holder; 8. Electromagnet; 9. Needle cylinder; 10. Steel ball; 11. Rotating motor; 12. Anti-rotation sleeve; 13. Anti-rotation cylinder; 14. Main screw; 1401. Spline cap; 15. Sliding seat; 16. Vertical screw shaft; 1601. Toothed disc; 1602. Handwheel; 17. Horizontal cylinder seat; 18. Slave screw; 1801. Turntable; 19. Lifting cylinder; 20. Longitudinal beam; 21. Milling cutter shaft; 2101. Latch; 2102. Control Cavity; 2103, ballway; 22, control rod; 23, return spring; 24, hinge seat; 25, lifting seat; 2501, guide rail; 26, hinge seat motor; 27, lifting plate; 2701, lifting block; 2702, sleeve; 28, lifting screw; 29, lifting motor; 30, direct drive motor; 31, power cylinder; 32, milling cutter motor; 33, platform; 3301, transverse guide rail; 34, transverse adjustment motor; 3401, transverse adjustment shaft; 35, bearing seat; 36, suspension platform; 3601, transverse block; 3602, longitudinal groove; 3603, longitudinal guide rail; 37, longitudinal adjustment motor; 3701, longitudinal adjustment shaft; 38, longitudinal plate; 3801, longitudinal block; 39, transverse motor; 40, transverse screw; 41, guide rod. DETAILED DESCRIPTION

[0016] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0018] The present invention will be further described below with reference to the accompanying drawings: like Figures 1 to 6 As shown, the present invention first proposes a processing device for a twisted-blade Roots blower impeller, comprising a stand 1, a transverse electric rail being provided on the top surface of the stand 1, the transverse electric rail comprising a transverse motor 39, the transverse motor 39 being mounted at one end of the stand 1, the output end of the transverse motor 39 being connected to a transverse screw 40, the transverse screw 40 being built into a transverse groove 102 opened on the top surface of the stand 1, the transverse screw 40 being rotatably connected to the two end surfaces of the transverse groove 102, guide rods 41 being parallel to the transverse screw 40 being provided on both sides thereof, the transverse screw 40 being threadedly connected to the middle screw hole of the driving block 203 at the bottom of the track seat 2, and the guide holes on both sides of the driving block 203 being slidably connected to the guide rod 41. The housing at the front end of the track seat 2 has a built-in rotary shaft assembly, which includes a rotary motor 11. The rotary motor 11 is built into the bottom of the housing of the track seat 2. The vertical output shaft of the rotary motor 11 is provided with a stop sleeve 12. The stop sleeve 12 cooperates with the arc block at the output end of the stop cylinder 13. The stop cylinder 13 is installed on the top surface of the housing. The top gear of the output shaft of the rotary motor 11 is engaged with the gear of the main screw 14. The main screw 14 is rotationally connected to the horizontal sleeve 202 at the top of the housing. The head end of the main screw 14 is provided with a spline cap 1401, and the threaded section at the tail end of the main screw 14 passes through the sleeve 202 and points to the slide assembly.

[0019] In this embodiment, the sliding seat 15 in the sliding seat assembly is slidably connected to the horizontal rail 201 at the tail end of the track seat 2, and can be fixed in position by bolts. The top surface of the sliding seat 15 is rotatably connected to the roots of the two vertical screw shafts 16, and the gear discs 1601 at the bottom of the vertical screw shaft 16 are engaged with each other. A handwheel 1602 is provided in the middle of the outer vertical screw shaft 16. The top threaded sections of the two vertical screw shafts 16 are threadedly connected to the threaded cylinders on both sides of the horizontal cylinder seat 17. The cylinder body of the horizontal cylinder seat 17 is rotatably connected to the slave screw 18. A turntable 1801 is provided at the head end of the slave screw 18, and the threaded section at the tail end of the screw 18 passes through the cylinder body and points to the main screw 14. The wheel axle 3 is connected between the master and slave screws, and the transverse electric rail can drive the wheel axle 3 to move transversely under the lifting gantry. The lifting gantry includes a lifting cylinder 19. The base of the lifting cylinder 19 is slidably connected to the transverse adjustment rails 101 on both sides of the top surface of the platform 1 and fastened by bolts. The piston rods of the lifting cylinders 19 on both sides are vertically connected to the two ends of the longitudinal beam 20. The side of the longitudinal beam 20 is connected to the knife block 4 by bolts. The knife head of the knife block 4 is facing downward and facing the wheel axle 3. The two sets of lifting gantries are respectively matched with the two ends of the wheel axle 3.

[0020] In this embodiment, one side of the middle part of the platform 1 is connected to the platform 33 in the bidirectional displacement seat, and the horizontal adjustment motor 34 is installed on the front side of the platform 33. The end of the horizontal adjustment shaft 3401 of the horizontal adjustment motor 34 is hinged to the bearing seat 35 on the tail side of the platform 33. The horizontal adjustment shaft 3401 is located between the horizontal guide rails 3301 on both sides of the top surface of the platform 33, and the horizontal guide rails 3301 are slidably connected to the sliders on both sides of the bottom surface of the suspension 36. The horizontal movement block 3601 in the middle of the bottom surface of the suspension 36 is threadedly connected to the horizontal adjustment shaft 3401, and the tail end of the suspension 36 is installed with a longitudinal adjustment motor 37. The longitudinal adjustment shaft 3701 of the longitudinal adjustment motor 37 extends into the longitudinal groove 3602 opened on the top surface of the suspension 36 and is rotatably connected to the end face of the longitudinal groove 3602. The longitudinal adjustment shaft 3701 is threadedly connected to the longitudinal movement block 3801 at the bottom of the longitudinal movement plate 38. The sliders on both sides of the longitudinal movement plate 38 are slidably connected to the longitudinal guide rails 3603 on both sides of the suspension 36, and the electric turntable 5 is installed on the top surface of the longitudinal movement plate 38.

[0021] In this embodiment, the electric turntable 5 is connected to the bottom surface of the articulated seat 24 in the robotic arm, and the seat plates on both sides of the articulated seat 24 are articulated to the spline shaft at the bottom of the lifting seat 25. The spline shaft is connected to the output end of the articulated seat motor 26. The articulated seat motor 26 is installed on the outer side of the seat plate of the articulated seat 24. The guide rails 2501 on both sides of the front of the lifting seat 25 are slidably connected to the sliders on both sides of the back of the lifting plate 27. The central lifting block 2701 on the back of the lifting plate 27 is threadedly connected to the lifting screw 28. The top of the lifting screw 28 is connected to the output end of the lifting motor 29. The lifting motor 29 is installed on the top surface of the lifting seat 25. The bottom of the lifting screw 28 is rotatably connected to the inner bottom surface of the lifting seat 25. The direct drive motor 30 is embedded in the cylinder sleeve 2702 on the front of the lifting plate 27. The output end of the direct drive motor 30 is connected to the side joint of the power cylinder 31. The side joint is rotatably connected to the cylinder mouth of the cylinder sleeve 2702. The milling cutter motor 32 is installed on the top of the power cylinder 31, and the output end of the milling cutter motor 32 is connected to the tool shaft assembly.

[0022] In this embodiment, the cutter shaft assembly includes a milling shaft 21, the top flange of the milling shaft 21 is connected to the milling motor 32, the bottom boss of the milling shaft 21 cooperates with the center hole of the milling disc 6, the pins 2101 evenly distributed on the annular surface of the boss correspond to the pin holes 601 on the bottom surface of the groove of the center hole of the milling disc 6, and a control cavity 2102 is opened on the bottom surface of the boss. The control rod 22 is slidably connected in the control cavity 2102, and the top of the control rod 22 is connected to the top surface of the control cavity 2102 through the return spring 23. The steel ball 10 is embedded in the ball channel 2103 arranged around the thin end of the boss. The aperture of the outlet end of the ball channel 2103 is slightly smaller than the diameter of the steel ball 10, and the inlet end of each ball channel 2103 is connected to the control cavity 2102. When the control rod 22 is in a low position, half of the sphere of the steel ball 10 is squeezed out of the ball channel 2103 to form a ball bulge. When the ball bulge is embedded in the ball groove 602 arranged around the wall of the center hole of the milling disc 6, the milling disc 6 can be locked. Before the cutter shaft assembly is clamped, each type of milling cutter disc 6 is placed in the countersink of the tool holder 7. An electromagnet 8 is provided on the bottom of the countersink, and a needle-type cylinder 9 is provided in the center of the electromagnet 8. When the control rod 22 is pushed to the highest position by the piston rod of the needle-type cylinder 9, the steel ball 10 can be completely collected in the ball track 2103.

[0023] The present invention also provides a processing method for the above-mentioned processing device, comprising the following steps: Hole positioning: Threaded holes are drilled in the centers of both end faces of the axle 3 blank to be machined. The main screw 14 is rotated via the spline cap 1401 until it engages the threaded hole at the head end of the axle 3. At this point, the rotary motor 11 is off, and the anti-rotation cylinder 13 releases the anti-rotation sleeve 12, allowing the main screw 14 to rotate freely. Move the sliding seat 15 to the appropriate position, adjust the slave screw 18 to the appropriate height using the handwheel 1602, rotate the turntable 1801, screwing the slave screw 18 into the threaded hole at the tail end of the axle 3, and then lock the sliding seat to the cross rail 201. End cutting: The rotary motor 11 is activated to rotate the axle 3. The lifting cylinder 19 adjusts the cutter block 4 to the target height, enabling it to cut the surface of the axle 3. The traverse electric rail is activated to move the axle 3 laterally, cooperating with the cutter block 4 to machine the shaft at the end of the axle 3. When machining a stepped shaft, the cutter block 4 processes from high to low. While machining one end of the axle 3, the lifting gantry at the other end is disengaged to avoid interference.

[0024] Impeller processing: Raise both sides of the lifting gantry to the disengaged position, turn off the rotating motor 11, start the anti-rotation cylinder 13 to lock the anti-rotation sleeve 12, so that the surface of the wheel shaft 3 to be processed faces the side of the bidirectional displacement seat, and the cutter shaft assembly moves to the top of the target milling disc 6 and then moves downward. The piston rod of the needle cylinder 9 pushes out and retracts the steel ball 10. After the cutter shaft assembly docks with the milling disc 6, turn off the electromagnet 8, and the piston rod moves downward to release the steel ball 10. The steel ball 10 locks the milling disc 6. The robotic arm brings out the milling disc 6 to process the middle part of the wheel shaft 3. During the processing, the cutter shaft assembly can repeat the above operation to replace the milling disc 6. The processing position of the milling disc 6 can be fully adjusted under the control of the robotic arm, the electric turntable 5 and the bidirectional displacement seat. When one side of the wheel shaft 3 is processed, the anti-rotation cylinder 13 releases the anti-rotation sleeve 12, and the rotating motor 11 adjusts the direction of the wheel shaft 3 to continue processing until all processing is completed.

[0025] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A processing device for a twisted blade Roots blower impeller, comprising a stand (1), characterized in that: The top surface of the platform (1) is connected to the track seat (2), the front end shell of the track seat (2) is built-in with a rotary shaft assembly, the rear end horizontal rail (201) of the track seat (2) is slidably connected to the slide seat assembly, the rotary shaft assembly and the slide seat assembly are rotatably connected to the wheel shaft (3), and the horizontal electric rail drives the wheel shaft (3) to move horizontally under the tool block (4) of the lifting gantry. A two-way displacement seat is provided on one side of the platform (1), and the top of the two-way displacement seat is connected to an electric turntable (5). The electric turntable (5) is connected to a robotic arm. The tool shaft assembly of the robotic arm cooperates with the milling cutter disc (6). Various types of milling cutter discs (6) are placed in the countersunk hole of the tool holder (7). The bottom surface of the countersunk hole is provided with an electromagnet (8). The center of the electromagnet (8) is provided with a needle-type cylinder (9). The piston rod of the needle-type cylinder (9) controls the retraction and extension of the steel ball (10) in the tool shaft assembly. When the steel ball (10) is released, it can lock the milling cutter disc (6).

2. The processing device for a twisted blade Roots blower impeller according to claim 1, characterized in that: The rotary shaft assembly includes a rotary motor (11), which is built into the bottom of the rail seat (2) housing. The vertical output shaft of the rotary motor (11) is provided with a stop sleeve (12), which cooperates with the arc block of the output end of the stop cylinder (13). The stop cylinder (13) is installed on the top surface of the housing. The top gear of the output shaft of the rotary motor (11) is meshed with the gear of the main screw (14). The main screw (14) is rotatably connected to the horizontal sleeve (202) at the top of the housing. The head end of the main screw (14) is provided with a spline cap (1401), and the tail end thread section of the main screw (14) passes through the sleeve (202) and points to the slide seat assembly.

3. The processing device for a twisted blade Roots blower impeller according to claim 1, characterized in that: The slide assembly comprises a slide seat (15), the slide seat (15) is slidably connected to the cross rail (201) and fastened by bolts, the top surface of the slide seat (15) is rotatably connected to the roots of the two vertical screw shafts (16), the gear discs (1601) at the bottom of the vertical screw shaft (16) are meshed with each other, a hand wheel (1602) is provided in the middle of the outer vertical screw shaft (16) shaft, the top threaded sections of the two vertical screw shafts (16) are threadedly connected to the threaded cylinders on both sides of the horizontal cylinder seat (17), the cylinder of the horizontal cylinder seat (17) is rotatably connected to the screw rod (18), a turntable (1801) is provided from the head end of the screw rod (18), and the threaded section from the tail end of the screw rod (18) passes through the cylinder body and points to the rotary shaft assembly.

4. The processing device for a twisted blade Roots blower impeller according to claim 1, characterized in that: The lifting gantry includes a lifting cylinder (19), the cylinder base of the lifting cylinder (19) is slidably connected to the horizontal adjustment rails (101) on both sides of the top surface of the platform (1) and is fastened by bolts, the piston rods of the lifting cylinders (19) on both sides are vertically connected to the two ends of the longitudinal beam (20), and the side of the longitudinal beam (20) is connected to the knife block (4) by bolts, and the knife head of the knife block (4) faces downward. The two sets of lifting gantry are respectively matched with the two ends of the wheel shaft (3).

5. The processing device for a twisted blade Roots blower impeller according to claim 1, characterized in that: The cutter shaft assembly comprises a milling cutter shaft (21), a flange on the top of the milling cutter shaft (21) is connected to the output end of the robot arm, a boss on the bottom of the milling cutter shaft (21) is matched with the center hole of the milling cutter disc (6), pins (2101) evenly distributed on the annular surface of the boss correspond to pin holes (601) on the bottom surface of the sink groove of the center hole of the milling cutter disc (6), a control cavity (2102) is opened on the bottom surface of the boss, a control rod (22) is slidably connected in the control cavity (2102), and the top of the control rod (22) is connected to the control cavity (2102) through a return spring (23). 2102), the steel ball (10) is embedded in the ball channel (2103) arranged around the thin end of the convex column, and each ball channel (2103) is connected to the control chamber (2102). When the control rod (22) is in a low position, half of the sphere of the steel ball (10) is squeezed out of the ball channel (2103) and cooperates with the ball groove (602) arranged around the wall of the center hole of the milling cutter disc (6). When the control rod (22) is pushed to a high position by the piston rod of the needle cylinder (9), the steel ball (10) can be completely received in the ball channel (2103).

6. The processing device for a twisted blade Roots blower impeller according to claim 1, characterized in that: The mechanical arm includes an articulated seat (24), the bottom surface of the articulated seat (24) is connected to the electric turntable (5), the seat plates on both sides of the articulated seat (24) are articulated to the spline shaft at the bottom of the lifting seat (25), the spline shaft is connected to the output end of the articulated seat motor (26), the articulated seat motor (26) is installed on the outer side of the seat plate of the articulated seat (24), the guide rails (2501) on both sides of the front of the lifting seat (25) are slidably connected to the sliders on both sides of the back of the lifting plate (27), the lifting block (2701) at the back of the lifting plate (27) is threadedly connected to the lifting screw (28), and the lifting screw The top of (28) is connected to the output end of the lifting motor (29), the lifting motor (29) is installed on the top surface of the lifting seat (25), the bottom of the lifting screw (28) is rotatably connected to the inner bottom surface of the lifting seat (25), the front sleeve (2702) of the lifting plate (27) is embedded with a direct drive motor (30), the output end of the direct drive motor (30) is connected to the side joint of the power cylinder (31), the side joint is rotatably connected to the barrel mouth of the sleeve (2702), the top of the power cylinder (31) is installed with a milling cutter motor (32), and the output end of the milling cutter motor (32) is connected to the cutter shaft assembly.

7. The processing device for a twisted blade Roots blower impeller according to claim 1, characterized in that: The bidirectional displacement seat includes a platform (33), the platform (33) is connected to the middle of the platform (1), a horizontal adjustment motor (34) is installed on the front side of the platform (33), the end of the horizontal adjustment shaft (3401) of the horizontal adjustment motor (34) is hinged to the tail side bearing seat (35) of the platform (33), the horizontal adjustment shaft (3401) is located between the horizontal guide rails (3301) on both sides of the top surface of the platform (33), the horizontal guide rails (3301) are slidably connected to the sliders on both sides of the bottom surface of the suspension platform (36), and the horizontal movement block (3601) in the middle of the bottom surface of the suspension platform (36) is threadedly connected to the horizontal The adjustment shaft (3401) is provided at the tail end of the suspension platform (36) with a longitudinal adjustment motor (37). The longitudinal adjustment shaft (3701) of the longitudinal adjustment motor (37) extends into the longitudinal groove (3602) provided on the top surface of the suspension platform (36) and is rotatably connected to the end surface of the longitudinal groove (3602). The longitudinal adjustment shaft (3701) is threadedly connected to the longitudinal movement block (3801) at the bottom of the longitudinal movement plate (38). The sliders on both sides of the longitudinal movement plate (38) are slidably connected to the longitudinal guide rails (3603) on both sides of the suspension platform (36). The electric turntable (5) is provided on the top surface of the longitudinal movement plate (38).

8. The processing device for a twisted blade Roots blower impeller according to claim 1, characterized in that: The transverse electric rail includes a transverse motor (39), which is installed at one end of the platform (1). The output end of the transverse motor (39) is connected to a transverse screw (40), which is built into a transverse groove (102) opened on the top surface of the platform (1). The transverse screw (40) is rotatably connected to the two end surfaces of the transverse groove (102). Guide rods (41) parallel to the transverse screw (40) are provided on both sides of the transverse screw (40). The transverse screw (40) is threadedly connected to the middle screw hole of the driving block (203) at the bottom of the track seat (2), and the guide holes on both sides of the driving block (203) are slidably connected to the guide rods (41).

9. The processing method of the processing device according to any one of claims 1 to 8, comprising the following steps: Hole opening and positioning: threaded holes are opened at the centers of both end faces of the wheel axle (3) to be processed, the head end of the wheel axle (3) is fixed to the screw of the rotary shaft assembly through the threaded holes, the slide assembly is adjusted to a suitable position so that the threaded hole at the tail end of the wheel axle (3) can be screwed to the screw of the slide assembly, and then the slide assembly is locked on the cross rail (201); End cutting: Start the rotary shaft assembly to drive the wheel shaft (3) to rotate, adjust the lifting gantry to the target height, make the knife block (4) cut the surface of the wheel shaft (3), start the transverse electric rail to drive the wheel shaft (3) to move horizontally, and cooperate with the knife block (4) to process the end of the wheel shaft (3); Impeller processing: Raise the lifting gantry to the disengaged position, lock the rotary shaft assembly, make the wheel shaft (3) to be processed face the side of the bidirectional displacement seat, move the cutter shaft assembly to the top of the target milling cutter disc (6) and then move downward, the piston rod of the needle cylinder (9) pushes out and retracts the steel ball (10), after the cutter shaft assembly is docked with the milling cutter disc (6), turn off the electromagnet (8), the piston rod moves downward to release the steel ball (10), the steel ball (10) locks the milling cutter disc (6), and the robot arm takes out the milling cutter disc (6) to process the middle part of the wheel shaft (3).

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