Forming hob for machining rotor curved surface of roots pump
By designing a forming hob device, the forming drive plate and track groove are used to achieve curved surface processing of Roots pump blades, which solves the problems of high cost and maintenance difficulties of CNC milling machines, and achieves the processing effect of low-cost and large-scale production.
Patent Information
- Application Number
- CN202420661618.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-02
AI Technical Summary
When processing existing Roots pump blades, CNC milling machines are costly and difficult to maintain, making them difficult to adapt to mass production, and special processing equipment is urgently needed.
Design a forming hob for machining the curved surface of Roots pump, including frame, feed assembly, forming assembly and cutting assembly. Through the cooperation of the forming drive plate, track groove and T-shaped straight groove, the forming moving head moves along the track. , realize the cutting of the edge surface of the blade by the hob, simplify programming, and reduce labor and production costs.
Compared with CNC milling machines, it saves labor costs and production costs, is suitable for mass production, reduces the cost of rotor surface processing of Roots pumps, and simplifies the process flow.
Smart Images
Figure CN222242936U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of Roots pumps, in particular to a forming hob used for machining the curved surface of a Roots pump rotor. Background Art
[0002] Roots pump is a centrifugal rotary mechanical pump, which consists of two meshing Roots gears. It rotates the Roots gears to form a sealed chamber in the pump cavity, and then sucks the gas from the suction port, expands and contracts the chamber, and finally discharges the gas. Roots pump has the characteristics of oil-free, pollution-free, pulsation-free, and low noise, and is suitable for conveying clean gas and gas-liquid mixture. It is widely used in sewage treatment, vacuum extraction, gas pressurization and other fields.
[0003] The Roots pump is composed of a pump body and a rotor. The rotor is composed of a rotating shaft and blades. The blades are sleeved on the outside of the rotor. The existing Roots pump blades are usually processed by a CNC milling machine to process the blade edge surface. The cost of processing the Roots pump blade edge surface by a CNC milling machine is relatively high, and it is urgent to specially process the Roots pump blade device. Therefore, we propose a forming hob for processing the Roots pump rotor surface to solve the above-mentioned problems. Utility Model Content
[0004] In view of the deficiencies in the prior art, the utility model provides a forming hob for machining the curved surface of a Roots pump rotor, which solves the problems mentioned in the above background.
[0005] The utility model provides the following technical solutions:
[0006] The utility model is a forming hob for machining the curved surface of a Roots pump rotor, comprising:
[0007] frame;
[0008] A feeding assembly, wherein the feeding assembly is arranged inside the frame;
[0009] A forming assembly, the forming assembly is arranged at the lower end of the feeding assembly, the forming assembly comprises a track disk, a forming drive disk and a forming motion head, the track disk is fixedly mounted at the lower part of the feeding assembly, the forming drive disk is rotatably connected to the lower surface of the track disk, and the forming motion head is movably connected inside the track disk and the forming drive disk;
[0010] as well as
[0011] A cutting assembly, the cutting assembly being arranged at the lower end of the forming movement head;
[0012] A track groove is formed on the lower surface of the track disk, a T-shaped straight groove is formed on the upper surface of the forming drive disk, the upper end of the forming motion head is slidably connected to the inside of the track groove, and the middle part of the forming motion head is slidably connected to the inside of the T-shaped straight groove.
[0013] Furthermore, the forming motion head includes a T-shaped slider, a cylindrical protrusion and a forming frame, the T-shaped slider is slidably connected inside the T-shaped straight groove, the cylindrical protrusion is fixedly arranged on the upper end of the T-shaped slider, the cylindrical protrusion is slidably connected inside the track groove, and the forming frame is fixedly arranged on the lower end of the T-shaped slider.
[0014] Furthermore, the feed assembly includes a feed frame, a guide rod and a lifting mechanism, the feed frame is arranged inside the frame, the guide rod is fixedly arranged on the upper surface of the feed frame, the guide rod passes through the upper surface of the frame, the lifting mechanism is arranged on the upper surface of the feed frame, and the track disk is fixedly arranged on the inner upper surface of the feed frame.
[0015] Furthermore, the lifting mechanism includes a worm, a worm wheel and a lead screw, the worm is rotatably connected to the upper surface of the frame, the worm wheel is rotatably connected to the upper surface of the frame, the worm is meshed with the worm wheel, the lead screw is fixedly arranged on the upper surface of the feed frame, and the lead screw is threadedly connected to the worm wheel.
[0016] Furthermore, a limit cover is fixedly mounted on the upper surface of the frame, the worm wheel is rotatably connected to the inside of the limit cover, a third servo motor is fixedly mounted on the upper surface of the frame, and the worm is fixedly mounted on the output end of the third servo motor.
[0017] Furthermore, a driven gear ring is sleeved on the outer side of the forming drive disk, and the driven gear ring is fixedly arranged on the outer side of the forming drive disk. A second servo motor is fixedly installed on the inner lower surface of the feed frame, and a driving gear is fixedly installed on the output end of the second servo motor, and the driving gear is meshed with the driven gear ring.
[0018] Furthermore, a limiting ring groove is provided on the edge of the lower side surface of the track disk, and a limiting circular ring is provided on the edge of the upper surface of the forming drive disk. The limiting circular ring is rotatably connected to the inside of the limiting ring groove.
[0019] Furthermore, the cutting assembly includes a first servo motor, a tool coupler and a roller cutter. The first servo motor is fixedly installed inside the forming frame, the tool coupler is fixedly installed at the output end of the first servo motor, and the upper end of the roller cutter is fixedly installed inside the tool coupler.
[0020] Compared with the prior art, the utility model has the following beneficial effects:
[0021] The utility model arranges a forming drive disk to be rotatably connected to the lower surface of the track disk, the lower surface of the track disk is provided with a track groove, the upper surface of the forming drive disk is provided with a T-shaped straight groove, and a forming motion head is slidably connected inside the track groove and the T-shaped straight groove at the same time, so that when the forming drive disk rotates, the forming motion head diffracts the track groove to move, and then the cutting assembly installed at the lower part of the forming motion head walks to cut out the edge curved surface of the Roots pump rotor blade. Compared with the use of CNC milling machine processing, there is no need to write complex programs, which saves labor costs. Compared with the CNC milling machine processing, the forming hob for the Roots pump rotor curved surface has a lower cost, which is conducive to saving production costs. Compared with the CNC milling machine of general equipment, the forming hob is more suitable for mass production in factories. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a schematic diagram of the overall assembly of the utility model;
[0023] Figure 2 It is a schematic diagram of the feeding assembly of the utility model;
[0024] Figure 3 It is a schematic diagram of the forming component of the utility model;
[0025] Figure 4 It is a schematic diagram of the cutting assembly of the utility model;
[0026] Figure 5 This is a schematic diagram of the disassembled feeding assembly of the utility model;
[0027] Figure 6 It is a schematic diagram of the exploded forming component of the utility model;
[0028] Figure 7 It is a schematic cross-sectional view of the forming component of the utility model.
[0029] In the figure: 1, frame; 2, limit cover; 3, worm; 4, worm wheel; 5, lead screw; 6, feed frame; 7, guide rod; 8, track disk; 9, forming drive disk; 10, driving gear; 11, driven gear ring; 12, track groove; 13, T-shaped straight groove; 14, T-shaped slider; 15, cylindrical protrusion; 16, forming frame; 17, first servo motor; 18, tool coupler; 19, hob; 20, third servo motor; 21, second servo motor; 22, limit ring groove; 23, limit ring. DETAILED DESCRIPTION
[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0031] The existing Roots pump rotor surface is usually processed by a CNC milling machine or a CNC machining center. As general metal cutting equipment, the CNC milling machine or the CNC machining center is difficult to maintain. When the same parts are produced in large quantities for a long time, the cost of processing parts is high.
[0032] See also Figure 1-7 A forming hob for machining a Roots pump rotor curved surface comprises a frame 1, a blank for machining a Roots pump rotor blade curved surface is fixedly mounted on the inner lower surface of the frame 1, a feed frame 6 is arranged inside the frame 1, a guide rod 7 is fixedly arranged on the upper surface of the feed frame 6, and the guide rod 7 is annularly distributed on the upper surface of the feed frame 6, the guide rod 7 is vertically arranged, the guide rod 7 is penetrated on the upper surface of the frame 1, and the guide rod 7 plays a guiding role, so that the feed frame 6 arranged inside the frame 1 can move vertically up and down, a limit cover 2 is fixedly mounted on the middle part of the upper surface of the frame 1, a worm wheel 4 is rotatably connected inside the limit cover 2, and the rotating shaft of the worm wheel 4 is perpendicular to the upper surface of the frame 1, and a screw rod 5 is threadedly connected inside the worm wheel 4 The lower end of the screw rod 5 is fixedly arranged on the upper surface of the feed frame 6, and the feed frame 6 is arranged vertically. A worm 3 is meshed with the outer side of the worm wheel 4. The worm 3 is rotatably connected to the upper surface of the frame 1, and the rotating shaft of the worm 3 is parallel to the upper surface of the frame 1. A third servo motor 20 is fixedly installed on the upper surface of the frame 1, and the worm 3 is fixedly installed at the output end of the third servo motor 20. When the third servo motor 20 drives the worm 3 fixedly installed at its output end to rotate, the worm 3 drives the worm wheel 4 meshed therewith to rotate. When the worm wheel 4 rotatably connected to the upper surface of the frame 1 rotates, it drives the screw rod 5 threadedly connected thereto to move up and down, thereby making the screw rod 5 drive the feed frame 6 fixed at its lower end to move up and down.
[0033] A track disk 8 is fixedly installed on the inner upper surface of the feed frame 6, and a forming drive disk 9 is rotatably connected to the lower surface of the track disk 8. A limiting ring groove 22 is provided on the edge of the lower surface of the track disk 8, and a limiting circular ring 23 is fixedly provided on the edge of the upper surface of the forming drive disk 9. The limiting circular ring 23 is rotatably connected inside the limiting circular groove 22. The limiting circular ring 23 embedded inside the limiting circular groove 22 enables the forming drive disk 9 to stably rotate on the lower surface of the track disk 8. A track groove 12 is provided on the lower surface of the track disk 8, and a T-shaped straight groove 13 is provided on the lower surface of the forming drive disk 9. A forming moving head is slidably connected inside the track groove 12 and the T-shaped straight groove 13 at the same time. The upper part of the forming moving head is slidably connected inside the track groove 12, and the middle part of the forming moving head is slidably connected inside the T-shaped straight groove 13. The forming moving head is composed of a T-shaped slider 14, a cylindrical protrusion 15 and a forming frame 16, wherein the T-shaped slider 14 slides Connected inside the T-shaped straight groove 13, the cylindrical protrusion 15 is slidably connected inside the track groove 12, a driven gear ring 11 is sleeved on the outside of the forming drive disk 9, and the driven gear ring 11 is fixedly arranged on the outside of the forming drive disk 9, and a second servo motor 21 is fixedly arranged on the inner upper surface of the feed frame 6, and a driving gear 10 is fixedly installed on the output end of the second servo motor 21, and the driving gear 10 is meshed with the driven gear ring 11. When the second servo motor 21 drives the driving gear 10 fixedly installed on its output end to rotate, the driving gear 10 drives the forming drive disk 9 to rotate inside the frame 1 through the driven gear ring 11 fixedly arranged on the outside of the forming drive disk 9. When the forming drive disk 9 rotates, the T-shaped straight groove 13 squeezes the T-shaped slider 14 slidably connected inside it, thereby forcing the forming moving head slidably connected to the T-shaped straight groove 13 and the track groove 12 at the same time to move along the track of the track groove 12.
[0034] A first servo motor 17 is fixedly installed inside the forming frame 16 fixedly arranged at the lower end of the T-shaped slider 14, and the output end of the first servo motor 17 is downward. A tool coupler 18 is fixedly installed on the output unit of the first servo motor 17, and a hob 19 is fixedly installed inside the tool coupler 18. The hob 19 is fixedly connected to the output end of the first servo motor 17 through the tool coupler 18. When the first servo motor 17 drives the hob 19 to rotate through the tool coupler 18, the hob 19 can cut the blank fixedly installed in the frame 1 with all its heart.
[0035] In summary, the first servo motor 17 drives the hob 19 to rotate through the tool coupling 18, thereby realizing the cutting of the blank. The cutting speed during metal cutting can be controlled by controlling the output speed of the first servo motor 17. The second servo motor 21 drives the forming drive disk 9 to rotate through the rotating mechanism composed of the driving gear 10 and the driven gear ring 11, thereby making the forming motion head that is simultaneously slidably connected to the T-shaped straight groove 13 and the track groove 12 move along the track groove 12. The cutting track of the hob 19 during metal cutting can be controlled by controlling the output speed of the second servo motor 21. The speed of the trajectory movement, the third servo motor 20 can drive the feed frame 6 to move up and down through the lifting mechanism composed of the worm 3, the worm wheel 4 and the lead screw 5. The feed speed during metal cutting can be controlled by controlling the output speed of the third servo motor 20, and finally the processing of the curved surface of the Roots pump rotor blade is realized. It should be noted that in order to avoid excessive twisting and winding of the wires powering the first servo motor 17, when processing the curved surface of the Roots pump rotor blade, the second servo motor 21 drives the forming frame 16 to rotate clockwise along the trajectory of the trajectory groove 12 for several turns and then rotate counterclockwise for the same number of turns.
[0036] By setting the forming drive disk 9 to be rotatably connected to the lower surface of the track disk 8, the lower surface of the track disk 8 is provided with a track groove 12, and the upper surface of the forming drive disk 9 is provided with a T-shaped straight groove 13. The forming motion head is slidably connected inside the track groove 12 and the T-shaped straight groove 13 at the same time, so that when the forming drive disk 9 rotates, the forming motion head diffracts the track groove 12, and then the cutting assembly composed of the first servo motor 17, the coupler 18 and the hob 19 installed at the lower part of the forming motion head walks to cut out the edge curved surface of the Roots pump rotor blade. Compared with the use of CNC milling machine processing, there is no need to write complex programs, which saves labor costs. Compared with the CNC milling machine processing, the forming hob for the Roots pump rotor curved surface has a lower cost, which is conducive to saving production costs. Compared with the CNC milling machine of general equipment, the forming hob is more suitable for factory mass production.
[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A forming hob for machining the curved surface of a Roots pump rotor, characterized in that: include: Rack (1); A feeding assembly, wherein the feeding assembly is arranged inside the frame (1); A forming assembly, the forming assembly being arranged at the lower end of the feeding assembly, the forming assembly comprising a track disk (8), a forming drive disk (9) and a forming motion head, the track disk (8) being fixedly mounted at the lower part of the feeding assembly, the forming drive disk (9) being rotatably connected to the lower surface of the track disk (8), and the forming motion head being movably connected inside the track disk (8) and the forming drive disk (9); as well as A cutting assembly, the cutting assembly being arranged at the lower end of the forming movement head; The lower surface of the track disk (8) is provided with a track groove (12), the upper surface of the forming drive disk (9) is provided with a T-shaped straight groove (13), the upper end of the forming motion head is slidably connected inside the track groove (12), and the middle part of the forming motion head is slidably connected inside the T-shaped straight groove (13).
2. The forming hob for machining the curved surface of a Roots pump rotor according to claim 1, characterized in that: The forming moving head comprises a T-shaped slider (14), a cylindrical protrusion (15) and a forming frame (16); the T-shaped slider (14) is slidably connected inside the T-shaped straight groove (13); the cylindrical protrusion (15) is fixedly arranged at the upper end of the T-shaped slider (14); the cylindrical protrusion (15) is slidably connected inside the track groove (12); and the forming frame (16) is fixedly arranged at the lower end of the T-shaped slider (14).
3. The forming hob for machining the curved surface of a Roots pump rotor according to claim 1, characterized in that: The feeding assembly comprises a feeding frame (6), a guide rod (7) and a lifting mechanism, wherein the feeding frame (6) is arranged inside the frame (1), the guide rod (7) is fixedly arranged on the upper surface of the feeding frame (6), the guide rod (7) penetrates the upper surface of the frame (1), the lifting mechanism is arranged on the upper surface of the feeding frame (6), and the track plate (8) is fixedly arranged on the inner upper surface of the feeding frame (6).
4. The forming hob for machining the curved surface of a Roots pump rotor according to claim 3, characterized in that: The lifting mechanism comprises a worm (3), a worm wheel (4) and a screw (5); the worm (3) is rotatably connected to the upper surface of the frame (1); the worm wheel (4) is rotatably connected to the upper surface of the frame (1); the worm (3) is meshed with the worm wheel (4); the screw (5) is fixedly arranged on the upper surface of the feed frame (6); and the screw (5) is threadedly connected to the worm wheel (4).
5. The forming hob for machining the curved surface of a Roots pump rotor according to claim 4, characterized in that: A limit cover (2) is fixedly mounted on the upper surface of the frame (1); the worm wheel (4) is rotatably connected to the inside of the limit cover (2); a third servo motor (20) is fixedly mounted on the upper surface of the frame (1); and the worm (3) is fixedly mounted on the output end of the third servo motor (20).
6. The forming hob for machining the curved surface of a Roots pump rotor according to claim 3, characterized in that: A driven gear ring (11) is sleeved on the outer side of the forming drive disk (9), and the driven gear ring (11) is fixedly arranged on the outer side of the forming drive disk (9). A second servo motor (21) is fixedly mounted on the inner lower surface of the feed frame (6), and a driving gear (10) is fixedly mounted on the output end of the second servo motor (21), and the driving gear (10) is meshed with the driven gear ring (11).
7. The forming hob for machining the curved surface of a Roots pump rotor according to claim 1, characterized in that: The lower edge of the track disk (8) is provided with a limiting annular groove (22), and the upper edge of the forming drive disk (9) is provided with a limiting circular ring (23), and the limiting circular ring (23) is rotatably connected inside the limiting annular groove (22).
8. The forming hob for machining the curved surface of a Roots pump rotor according to claim 2, characterized in that: The cutting assembly comprises a first servo motor (17), a tool coupler (18) and a rolling cutter (19); the first servo motor (17) is fixedly mounted inside the forming frame (16); the tool coupler (18) is fixedly mounted at the output end of the first servo motor (17); and the upper end of the rolling cutter (19) is fixedly mounted inside the tool coupler (18).