Rotor shaft knurling press-fitting composite machining device

Abstract

The present application relates to rotor shaft processing technical field, disclose a kind of rotor shaft knurling press-fit composite processing device, including processing table, the supporting leg is installed at the bottom of the processing table, the fixed frame one and the fixed frame two are respectively installed at the top of the processing table near two sides, the knurling mechanism for being knurled to rotor shaft is arranged in the fixed frame one, the press-fit mechanism for being press-fit core to rotor shaft is arranged in the fixed frame two, cleaning mechanism for cleaning the iron filings of rotor shaft knurling position is arranged between the fixed frame one and the fixed frame two, the present application, by integrating knurling mechanism and press-fit mechanism on the same processing table, and using electric slide rail drive fixed seat one sequentially through knurling station, cleaning station and press-fit station, realize the one-time clamping of rotor shaft knurling and core press-fit, continuous automatic processing, without manual transfer and secondary positioning in the middle of the way, substantially shorten the waiting time between processes, improve production efficiency.

Description

Technical Field

[0001] This invention belongs to the field of rotor shaft processing technology, specifically, it relates to a rotor shaft knurling and pressing composite processing device. Background Technology

[0002] In traditional rotor shaft machining processes, knurling and core pressing are usually performed as two independent processes on different equipment. The operator first needs to clamp the rotor shaft on a knurling machine, complete the knurling of specific positions on the shaft end or shaft body, remove the rotor shaft and clean the surface iron filings, and then transfer it to the pressing machine for re-clamping. Subsequently, the core is pressed onto the knurled shaft section by the pressing equipment.

[0003] The existing decentralized processing mode requires multiple clamping and transfer of the rotor shaft, which leads to excessive auxiliary time, low production efficiency, and difficulty in meeting the requirements of mass production cycle. Moreover, the positioning references used for the two clampings are different, which can easily introduce positioning errors, making it difficult to guarantee the coaxiality of the knurled part and the subsequent pressing part. This affects the perpendicularity, tightness, and overall dynamic balance performance of the rotor after pressing. At the same time, since there are iron filings on the shaft surface after knurling, if they are not cleaned in time and are directly transferred, the residual iron filings may scratch the shaft surface or the inner hole of the iron core during the pressing process, causing abnormal fluctuations in pressing force, or even causing iron core misalignment or shaft surface damage, reducing the product qualification rate. To address these issues, we propose a rotor shaft knurling and pressing composite processing device. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0005] A rotor shaft knurling and press-fitting composite processing device includes a processing table with support legs installed at the bottom. A first fixed frame and a second fixed frame are respectively installed near the two sides of the top of the processing table. The first fixed frame contains a knurling mechanism for knurling the rotor shaft, and the second fixed frame contains a press-fitting mechanism for press-fitting the rotor shaft with an iron core. A cleaning mechanism for cleaning iron filings from the knurled area of ​​the rotor shaft is provided between the first and second fixed frames. An electric slide rail is installed at the top of the processing table, and a first fixed seat is slidably connected to the top of the processing table. A connecting slide plate is installed on the outer wall of the first fixed seat, and the connecting slide plate is slidably connected to the electric slide rail. An electric cylinder is installed at the top of the first fixed frame, with the piston rod of the electric cylinder moving through the top of the first fixed frame. The second fixed seat is installed at the bottom of the piston rod of the electric cylinder.

[0006] In a preferred embodiment of the present invention, the knurling mechanism includes knurling assemblies disposed on the front and rear sides of a fixed frame. The knurling assembly includes a hydraulic cylinder, which is mounted on the outer wall of the fixed frame. The piston rod of the hydraulic cylinder moves through the fixed frame. A connecting frame is mounted on one end of the piston rod of the hydraulic cylinder. A motor is mounted on the top of the connecting frame. A rotating shaft is mounted on the output end of the motor. The rotating shaft passes through the top of the connecting frame and is rotatably connected to the connecting frame through a bearing. A knurling wheel is fixedly sleeved on the outer wall of the rotating shaft. A controller is mounted on the bottom of the processing table and is electrically connected to the hydraulic cylinder.

[0007] In a preferred embodiment of the present invention, a limiting rod is installed on the outer wall of the connecting frame, and a rod hole is provided on the fixing frame. The limiting rod moves through the rod hole. By setting the limiting rod, the connecting frame can be limited to ensure the stability of the connecting frame when the knurled wheel is in use.

[0008] In a preferred embodiment of the present invention, the pressing mechanism includes a second hydraulic cylinder and an iron core mold box. The second hydraulic cylinder is mounted on the top of a second fixed frame. The piston rod of the second hydraulic cylinder moves through the top of the second fixed frame. A connecting frame is mounted on the bottom end of the piston rod of the second hydraulic cylinder. A pressure ring is mounted on the bottom end of the connecting frame. A connecting plate is detachably connected to the outer wall of the iron core mold box by bolts. A fixed shell is mounted on the top of the processing table. A limit rod is connected between the top of the inner wall of the fixed shell and the top of the processing table. A rod hole is provided on the connecting plate. The limit rod moves through the rod hole. A spring surrounds the outer wall of the limit rod. The spring is installed between the bottom of the connecting plate and the top of the processing table. The controller is electrically connected to the second hydraulic cylinder. By setting the limit rod, the spring and the connecting plate can be limited, ensuring the stability of the spring when compressed and the connecting plate when moving.

[0009] In a preferred embodiment of the present invention, the pressure ring is positioned opposite to the iron core mold box.

[0010] In a preferred embodiment of the present invention, the cleaning mechanism includes a first support plate and a second support plate. The first support plate is installed on the top of the processing table near the rear side. A screw is threadedly connected to a threaded hole on the first support plate. One end of the screw is rotatably connected to a fixed plate through a bearing seat. A backing plate is installed on the front of the fixed plate. A rotating plate is installed on the other end of the screw. The fixed plate is limited to the first support plate. The second support plate is installed on the top of the processing table near the front side. An air pump is installed on the front of the second support plate. A connecting pipe is provided at the output end of the air pump. The connecting pipe passes through the second support plate, and a nozzle is provided at one end of the connecting pipe. The controller is electrically connected to the air pump.

[0011] In a preferred embodiment of the present invention, a limiting rod three is installed on the back of the fixing plate, and a rod hole three is opened on the support plate one. The limiting rod three moves through the rod hole three. By setting the limiting rod three, the fixing plate can be limited to ensure the stability of the abutment plate during use.

[0012] In a preferred embodiment of the present invention, the abutment is made of wear-resistant rubber.

[0013] In a preferred embodiment of the present invention, both the top end of the first fixed seat and the top end of the second fixed seat are provided with grooves, and bushings are inserted into the grooves. The two bushings are detachably connected to the first fixed seat and the second fixed seat respectively by bolts. The inner wall of the groove is rotatably connected to a pin through a bearing seat. By setting the pin, the rotor shaft can be fixed on the first fixed seat and the second fixed seat.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] This invention integrates the knurling mechanism and the pressing mechanism on the same processing table, and uses an electric slide rail to drive the fixed seat to pass through the knurling station, cleaning station and pressing station in sequence. This realizes one-time clamping and continuous automated processing of rotor shaft knurling and iron core pressing, eliminating the need for manual intermediate transfer and secondary positioning, greatly shortening the waiting time between processes and improving production efficiency.

[0016] This invention features a cleaning mechanism consisting of a backing plate, an air pump, and a nozzle, specifically designed between the knurling station and the pressing station. As the rotor shaft moves towards the pressing station after knurling, the backing plate makes frictional contact with the rotating knurled part, causing it to rotate passively. Simultaneously, the nozzle sprays high-pressure airflow to completely blow away the iron filings, effectively preventing the impact of residual iron filings on the subsequent pressing accuracy and core fit tightness. This also prevents pressing scratches or interference deviations caused by iron filings, significantly enhancing the reliability of the pressing process.

[0017] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0018] In the attached diagram:

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the bottom structure of the present invention;

[0021] Figure 3 This is a schematic cross-sectional view of one side of the fixing frame of the present invention;

[0022] Figure 4 This is a schematic cross-sectional view of one side of the fixing base of the present invention;

[0023] Figure 5 This is a schematic diagram of the cross-sectional structure of the fixing frame of the present invention from two sides;

[0024] Figure 6 For the present invention Figure 5 Enlarged structural diagram of section A in the middle;

[0025] Figure 7 This is a schematic diagram of the cross-sectional structure of the support plate of the present invention on two sides;

[0026] Figure 8 For the present invention Figure 7 Enlarged structural diagram of section B.

[0027] In the diagram: 1. Processing table; 2. Support leg; 3. Controller; 4. Fixing frame one; 5. Fixing frame two; 6. Fixing base one; 7. Connecting slide plate; 8. Electric slide rail; 9. Bushing; 10. Groove; 11. Ejector pin; 12. Hydraulic cylinder one; 13. Connecting frame; 14. Motor; 15. Rod hole one; 16. Limiting rod one; 17. Rotating shaft; 18. Knurling wheel; 19. Electric cylinder; 20. Hydraulic cylinder two; 21. 1. Connecting frame; 22. Pressure ring (22); 23. Iron core mold box; 24. Connecting plate; 25. Fixing shell; 26. Limiting rod two; 27. Spring; 28. Support plate one; 29. ​​Fixing plate; 30. Abutment plate; 31. Limiting rod three; 32. Screw; 33. Rotating plate; 34. Support plate two; 35. Air pump; 36. Connecting pipe; 37. Nozzle; 38. Rod hole two; 39. Rod hole three; 40. Fixing seat two. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0029] like Figures 1 to 8 As shown, the present invention provides a technical solution: a rotor shaft knurling and press-fitting composite processing device, including a processing table 1, a support leg 2 installed at the bottom of the processing table 1, a fixed frame 4 and a fixed frame 5 respectively installed at the top of the processing table 1 near both sides, a knurling mechanism for knurling the rotor shaft is provided inside the fixed frame 4, a press-fitting mechanism for press-fitting the rotor shaft with an iron core is provided inside the fixed frame 5, a cleaning mechanism for cleaning iron filings at the knurling position of the rotor shaft is provided between the fixed frame 4 and the fixed frame 5, an electric slide rail 8 is installed at the top of the processing table 1, a fixed seat 6 is slidably connected to the top of the processing table 1, a connecting slide plate 7 is installed on the outer wall of the fixed seat 6, the connecting slide plate 7 is slidably connected to the electric slide rail 8, an electric cylinder 19 is installed at the top of the fixed frame 4, the piston rod of the electric cylinder 19 moves through the top of the fixed frame 4, and a fixed seat 40 is installed at the bottom of the piston rod of the electric cylinder 19.

[0030] Furthermore, the knurling mechanism includes knurling assemblies disposed on the front and rear sides of the fixed frame 4. The knurling assembly includes a hydraulic cylinder 12, which is mounted on the outer wall of the fixed frame 4. The piston rod of the hydraulic cylinder 12 moves through the fixed frame 4. A connecting frame 13 is mounted on one end of the piston rod of the hydraulic cylinder 12. A motor 14 is mounted on the top of the connecting frame 13. A rotating shaft 17 is mounted on the output end of the motor 14. The rotating shaft 17 passes through the top of the connecting frame 13 and is rotatably connected to the connecting frame 13 through a bearing. A knurling wheel 18 is fixedly sleeved on the outer wall of the rotating shaft 17. A controller 3 is mounted on the bottom of the processing table 1 and is electrically connected to the hydraulic cylinder 12.

[0031] Furthermore, a limiting rod 16 is installed on the outer wall of the connecting frame 13, and a rod hole 15 is opened on the fixing frame 4, through which the limiting rod 16 moves.

[0032] By setting a limit rod 16, the connecting frame 13 can be limited to ensure the stability of the connecting frame 13 when the knurled wheel 18 is in use.

[0033] Furthermore, the pressing mechanism includes a hydraulic cylinder 20 and an iron core mold box 23. The hydraulic cylinder 20 is installed at the top of the fixed frame 25. The piston rod of the hydraulic cylinder 20 moves through the top of the fixed frame 25. A connecting frame 21 is installed at the bottom of the piston rod of the hydraulic cylinder 20. A pressure ring 22 is installed at the bottom of the connecting frame 21. A connecting plate 24 is detachably connected to the outer wall of the iron core mold box 23 by bolts. A fixed shell 25 is installed at the top of the processing table 1. A limit rod 26 is connected between the top of the inner wall of the fixed shell 25 and the top of the processing table 1. A rod hole 38 is opened on the connecting plate 24. The limit rod 26 moves through the rod hole 38. A spring 27 surrounds the outer wall of the limit rod 26. The spring 27 is installed between the bottom of the connecting plate 24 and the top of the processing table 1. The controller 3 is electrically connected to the hydraulic cylinder 20.

[0034] By setting the limiting rod 26, the spring 27 and the connecting plate 24 can be limited, ensuring the stability of the spring 27 when compressed and the connecting plate 24 when moving.

[0035] Furthermore, the pressure ring 22 and the iron core mold box 23 are positioned opposite each other.

[0036] Furthermore, the cleaning mechanism includes a first support plate 28 and a second support plate 34. The first support plate 28 is installed on the top of the processing table 1 near the rear side. A screw 32 is threaded into a threaded hole on the first support plate 28. One end of the screw 32 is rotatably connected to a fixed plate 29 through a bearing seat. A stop plate 30 is installed on the front of the fixed plate 29. A rotating plate 33 is installed on the other end of the screw 32. The fixed plate 29 is limited to the first support plate 28. The second support plate 34 is installed on the top of the processing table 1 near the front side. An air pump 35 is installed on the front of the second support plate 34. A connecting pipe 36 is connected to the output end of the air pump 35. The connecting pipe 36 passes through the second support plate 34, and a nozzle 37 is connected to one end of the connecting pipe 36. The controller 3 is electrically connected to the air pump 35.

[0037] Furthermore, a limiting rod 31 is installed on the back of the fixing plate 29, and a rod hole 39 is opened on the support plate 28, through which the limiting rod 31 moves.

[0038] Among them, by setting the limiting rod 31, the fixing plate 29 can be limited to ensure the stability of the abutment plate 30 during use.

[0039] Furthermore, the material of the abutment plate 30 is wear-resistant rubber.

[0040] Furthermore, both the top of the first fixed seat 6 and the top of the second fixed seat 40 are provided with grooves 10, and bushings 9 are inserted into the grooves 10. The two bushings 9 are detachably connected to the first fixed seat 6 and the second fixed seat 40 respectively by bolts. The inner wall of the groove 10 is rotatably connected to the ejector pin 11 through the bearing seat.

[0041] The rotor shaft can be fixed on the fixed seat 6 and the fixed seat 40 by setting the ejector pin 11.

[0042] The implementation principle of a rotor shaft knurling press-fit composite processing device is as follows: Before operation, the operator first selects a matching bushing 9 according to the diameter of the rotor shaft to be processed, and installs it in the groove 10 at the top of the fixed seat 1 6 and the groove 10 at the bottom of the fixed seat 2 40 respectively by bolts, to ensure that the bushing 9 and the rotor shaft form a precise fit. At the same time, the iron core to be press-fitted is placed into the iron core mold box 23.

[0043] To accommodate different rotor shaft positions, the operator can rotate the rotating plate 33 to drive the screw 32 to rotate in the threaded hole of the support plate 28, thereby adjusting the front and rear positions of the fixing plate 29 and the abutment plate 30 so that the wear-resistant rubber surface of the abutment plate 30 can form effective frictional contact with the rotor shaft.

[0044] After these preparations are completed, the device is started. The controller 3 automatically controls the electric slide rail 8 to be energized according to the preset program. The electric slide rail 8 drives the fixed seat 6 to slide to the right through the connecting slide plate 7, first entering the knurling station inside the fixed frame 4. At this time, the controller 3 first issues a command to activate the electric cylinder 19, whose piston rod extends downward, driving the fixed seat 40 to descend until the ejector pins 11 on the fixed seat 40 and the ejector pins 11 on the fixed seat 6 respectively press against the center hole of the rotor shaft from the upper and lower ends, realizing the axial positioning and clamping of the rotor shaft. Next, the controller 3 simultaneously activates the two knurling assemblies on the front and rear sides of the fixed frame 4. The piston rod of the hydraulic cylinder 12 extends, pushing the connecting frame 13 and the limiting rod 16 to move smoothly into the fixed frame 4 along the rod hole 15. At the same time, the motor 14 starts and drives the knurling wheel 18 to rotate at high speed through the rotating shaft 17. When the two knurling wheels 18 symmetrically contact and press into the rotor shaft surface from the front and rear sides, a uniform knurling pattern is formed at the predetermined position of the rotor shaft by relying on the rotation of the knurling wheel 18 and the relative movement of the rotor shaft.

[0045] After the knurling process is completed, the controller 3 first instructs the hydraulic cylinder 12 to drive the knurling wheel 18 to retract and reset, and then instructs the electric cylinder 19 to drive the fixed seat 40 to rise, releasing the top of the rotor shaft. Subsequently, the controller 3 restarts the electric slide rail 8, driving the fixed seat 6 to carry the knurled rotor shaft to continue moving to the right and enter the cleaning station. When the knurled part of the rotor shaft moves to contact the abutment plate 30, since the abutment plate 30 is made of wear-resistant rubber and is fixed in position, the rotor shaft will rub against the abutment plate 30 during its continued forward movement, thus passively rotating around its own axis. At the same time, the controller 3 triggers the air pump 35 to work, and high-pressure gas is sprayed out at high speed from the nozzle 37 through the connecting pipe 36, facing the knurled surface of the rotating rotor shaft, using the airflow to completely blow away the iron filings and impurities generated during the knurling process.

[0046] After cleaning, the electric slide rail 8 continues to drive the fixed seat 6 to move to the right to the pressing position inside the fixed frame 5 and stops. At this time, the part of the rotor shaft to be pressed is located directly below the iron core mold box 23. The controller 3 then commands the hydraulic cylinder 20 to operate, and its piston rod extends downward, pushing the connecting frame 21 and the pressure ring 22 down. The pressure ring 22 first contacts and covers the upper end surface of the iron core mold box 23, and then overcomes the elastic force of the spring 27, pushing the iron core mold box 23 and the connecting plate 24 along the limit rod 2. 6. Slide downwards to press the iron core inside the iron core mold box 23 smoothly onto the knurled part corresponding to the rotor shaft. Due to the increased surface roughness of the rotor shaft after knurling, the iron core is firmly pressed into the knurled position, forming an interference fit. After pressing is completed, the hydraulic cylinder 20 drives the pressure ring 22 to rise, and the iron core mold box 23 returns to the initial position under the reset action of the spring 27. The electric slide rail 8 drives the fixed seat 6 to return to the left waiting position, and the operator can then take out the rotor shaft that has completed the knurling and pressing composite processing.

[0047] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 rotor shaft knurling and pressing composite processing device, comprising a processing table (1), wherein a support leg (2) is installed at the bottom end of the processing table (1), characterized in that, The processing table (1) is equipped with a first fixed frame (4) and a second fixed frame (5) near the top of the two sides. The first fixed frame (4) is equipped with a knurling mechanism for knurling the rotor shaft. The second fixed frame (5) is equipped with a pressing mechanism for pressing the rotor shaft with an iron core. A cleaning mechanism for cleaning iron filings at the knurling position of the rotor shaft is provided between the first fixed frame (4) and the second fixed frame (5). An electric slide rail (8) is installed at the top of the processing table (1). A first fixed seat (6) is slidably connected to the top of the processing table (1). A connecting slide plate (7) is installed on the outer wall of the first fixed seat (6). The connecting slide plate (7) is slidably connected to the electric slide rail (8). An electric cylinder (19) is installed at the top of the first fixed frame (4). The piston rod of the electric cylinder (19) moves through the top of the first fixed frame (4). A second fixed seat (40) is installed at the bottom of the piston rod of the electric cylinder (19).

2. The rotor shaft knurling and pressing composite processing device according to claim 1, characterized in that, The knurling mechanism includes knurling assemblies disposed on the front and rear sides of the fixed frame (4). The knurling assembly includes a hydraulic cylinder (12). The hydraulic cylinder (12) is installed on the outer wall of the fixed frame (4). The piston rod of the hydraulic cylinder (12) moves through the fixed frame (4). A connecting frame (13) is installed at one end of the piston rod of the hydraulic cylinder (12). A motor (14) is installed at the top of the connecting frame (13). A rotating shaft (17) is installed at the output end of the motor (14). The rotating shaft (17) passes through the top of the connecting frame (13) and is rotatably connected to the connecting frame (13) through a bearing. A knurling wheel (18) is fixedly sleeved on the outer wall of the rotating shaft (17). A controller (3) is installed at the bottom of the processing table (1). The controller (3) is electrically connected to the hydraulic cylinder (12).

3. The rotor shaft knurling and pressing composite processing device according to claim 2, characterized in that, The outer wall of the connecting frame (13) is equipped with a limiting rod (16), and the fixing frame (4) has a rod hole (15) and the limiting rod (16) moves through the rod hole (15).

4. The rotor shaft knurling and pressing composite processing device according to claim 2, characterized in that, The pressing mechanism includes a second hydraulic cylinder (20) and a core mold box (23). The second hydraulic cylinder (20) is installed at the top of the second fixed frame (5). The piston rod of the second hydraulic cylinder (20) moves through the top of the second fixed frame (5). A connecting frame (21) is installed at the bottom of the piston rod of the second hydraulic cylinder (20). A pressure ring (22) is installed at the bottom of the connecting frame (21). A connecting plate (24) is detachably connected to the outer wall of the core mold box (23) by bolts. The top of the processing table (1) A fixed shell (25) is installed, and a limiting rod (26) is connected between the top of the inner wall of the fixed shell (25) and the top of the processing table (1). A rod hole (38) is opened on the connecting plate (24), and the limiting rod (26) moves through the rod hole (38). A spring (27) surrounds the outer wall of the limiting rod (26), and the spring (27) is installed between the bottom of the connecting plate (24) and the top of the processing table (1). The controller (3) is electrically connected to the hydraulic cylinder (20).

5. The rotor shaft knurling and pressing composite processing device according to claim 4, characterized in that, The pressure ring (22) is positioned opposite to the iron core mold box (23).

6. The rotor shaft knurling and pressing composite processing device according to claim 2, characterized in that, The cleaning mechanism includes a first support plate (28) and a second support plate (34). The first support plate (28) is installed on the top of the processing table (1) near the rear side. A screw (32) is threaded into a threaded hole on the first support plate (28). One end of the screw (32) is rotatably connected to a fixed plate (29) through a bearing seat. A backing plate (30) is installed on the front of the fixed plate (29). A rotating plate (33) is installed on the other end of the screw (32). The fixed plate (29) is limited to the first support plate (28). The second support plate (34) is installed on the top of the processing table (1) near the front side. An air pump (35) is installed on the front of the second support plate (34). A connecting pipe (36) is connected to the output end of the air pump (35). The connecting pipe (36) passes through the second support plate (34), and a nozzle (37) is connected to one end of the connecting pipe (36). The controller (3) is electrically connected to the air pump (35).

7. The rotor shaft knurling and pressing composite processing device according to claim 6, characterized in that, The fixed plate (29) has a limiting rod three (31) installed on its back side, and the support plate one (28) has a rod hole three (39) which is movable through the rod hole three (39).

8. The rotor shaft knurling and pressing composite processing device according to claim 6, characterized in that, The abutment (30) is made of wear-resistant rubber.

9. The rotor shaft knurling and pressing composite processing device according to claim 1, characterized in that, The top of the first fixed seat (6) and the top of the second fixed seat (40) are both provided with grooves (10). A bushing (9) is inserted into the groove (10), and the two bushings (9) are detachably connected to the first fixed seat (6) and the second fixed seat (40) respectively by bolts. The inner wall of the groove (10) is rotatably connected to a pin (11) through a bearing seat.

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