Grinding wheel dresser
Through the design of the motor direct drive and locking device, the surface texture problem of the grinding wheel caused by belt transmission is solved, high-precision grinding wheel dressing is achieved, processing accuracy and product quality are improved, and the rigidity and sealing effect of the dresser are enhanced.
Patent Information
- Application Number
- CN202421116007.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-20
AI Technical Summary
In the existing grinding wheel trimmer, the spindle jump and unstable stress caused by the belt transmission mechanism lead to traces on the surface of the trimmed grinding wheel, which affects the processing accuracy and product quality.
The motor direct drive structure is adopted, and the design of front and rear locking devices and diamond rollers ensures stable rotation and high-precision adjustment of the spindle, cancels traditional belt transmission, uses the motor direct drive to drive the spindle to rotate, and prevents particles from entering through the sealing structure.
The surface of the grinding wheel is trimmed is achieved, which improves processing accuracy and product quality, reduces the difficulty of processing parts, and enhances the rigidity and sealing effect of the dresser.
Smart Images
Figure CN222244308U_ABST
Abstract
Description
Technical field:
[0001] The utility model belongs to the technical field of grinding wheel dressing, in particular to a grinding wheel dresser. Background technology:
[0002] CNC grinding machines are machine tools that use grinding tools to grind the surface of workpieces through CNC technology. Most grinding machines use high-speed rotating grinding wheels for grinding. During the grinding process, the grinding wheel will inevitably wear out, and the shape of the worn grinding wheel will change, affecting the grinding of the workpiece. The grinding wheel dresser can dress the grinding wheel. Through the grinding of the diamond roller and the grinding wheel, the shape of the grinding wheel can be trimmed to a state that can continue to be used.
[0003] For example, the CBN grinding wheel dressing spindle of a bearing grinder disclosed in the Chinese invention patent (publication number CN 111745543A, application date 2020.06.12, publication date 2020.10.09), the grinding wheel dressing spindle includes a dressing spindle seat, a front end cover is fixedly connected to one end of the dressing spindle seat, a first bearing and a second bearing are respectively installed on both sides of the center of the dressing spindle seat, a transmission spindle is installed in the center of the first bearing and the second bearing, a diamond roller is fixedly connected to the end of the transmission spindle close to the front end cover, a rear end cover is installed at the end of the dressing spindle seat away from the front end cover, and a belt drive pulley corresponding to the transmission spindle is installed in the center of the rear end cover.
[0004] As can be seen from the above, the transmission spindle of the grinding wheel dressing spindle is driven by a belt transmission mechanism. Since the belt of the belt transmission mechanism will vibrate, the transmission spindle will jump. In addition, the belt will pull the transmission spindle to the side of the motor, resulting in unstable force on the transmission spindle, and even center movement, resulting in lines on the surface of the dressing grinding wheel, and ultimately the surface of the processed workpiece will also have lines, affecting product precision and quality. Summary of the invention:
[0005] The utility model aims to provide a tailstock type grinding wheel dresser which is directly driven by a motor and has no lines on the surface of the grinding wheel after dressing.
[0006] The utility model is achieved in this way:
[0007] A grinding wheel dresser comprises a main shaft, which is rotatably connected to a dresser seat through a front bearing and a rear bearing arranged at a front and rear interval. Both ends of the main shaft extend out of the front and rear ends of the dresser seat respectively. A diamond roller is arranged at the front end of the main shaft, and the rear end is connected to the rotating shaft of a motor through a coupling. The motor is installed on the dresser seat through a motor seat.
[0008] In the above-mentioned grinding wheel dresser, the axial dimension of the diamond roller is 20-50 mm.
[0009] In the above-mentioned grinding wheel dresser, the main shaft is a stepped shaft, including an axis body, a first axis body and a second axis body are arranged at one end of the axis body, and a third axis body and a fourth axis body are arranged at the other end. The diameter of the first axis body is larger than the diameter of the axis body and the second axis body, and a first step surface is formed between the first axis body and the axis body, and a second step surface is formed between the second axis body and the first axis body. The diameter of the third axis body is smaller than the diameter of the axis body, and a third step surface is formed between the third axis body and the axis body.
[0010] In the above-mentioned grinding wheel dresser, a spindle hole is provided on the dresser seat, the front bearing is mounted on the shaft body close to one end of the first shaft body, and the rear bearing is mounted on the third shaft body. The outer rings of the front bearing and the rear bearing are connected to the inner wall of the spindle hole of the dresser seat, and the inner rings are connected to the spindle. The front bearing and the rear bearing are locked on the spindle by a front locking device and a rear locking device respectively.
[0011] In the above-mentioned grinding wheel dresser, the front locking device includes a spacer sleeve, a front locking ring, and a front limit piece which are sequentially arranged on the shaft body at the rear end of the front bearing. The front locking ring has a plurality of threaded holes distributed circumferentially. The screws are threaded in the threaded holes and abut against the end face of the spacer sleeve. The front bearing, the spacer sleeve, and the front locking ring are limited between the first step surface and the front limit piece.
[0012] In the above-mentioned grinding wheel dresser, a front end cover is fixedly arranged on the front end face of the dresser seat, an annular convex edge is arranged on the outside of the front end cover, the annular convex edge abuts against the end face of the dresser seat, and a sealing ring is arranged between the annular convex edge and the first shaft body, the outer circle of the sealing ring contacts with the front end cover, and the inner circle contacts with the main shaft to achieve sealing, an annular groove is arranged inside the front end cover, and an air pipe interface connected with the annular groove is arranged on the outer circle of the front end cover.
[0013] In the above-mentioned grinding wheel dresser, the rear locking device includes a rear bearing pressure pad, a rear locking ring, and a rear limit piece which are mounted on the third shaft body. The rear locking ring has a plurality of threaded holes distributed circumferentially. The screws are threaded into the threaded holes and abut against the end face of the rear bearing pressure pad. The rear bearing, the rear bearing pressure pad, and the rear locking ring are limited between the third step surface and the rear limit piece.
[0014] In the above-mentioned grinding wheel dresser, a rear bearing retaining ring is arranged on the third shaft body between the third step surface and the rear bearing.
[0015] In the above-mentioned grinding wheel dresser, the motor seat includes a cylindrical body, and a front flange and a rear flange are respectively extended radially outward at both ends of the cylindrical body. The front flange and the rear flange are fixedly connected to the dresser seat and the motor by screws respectively.
[0016] In the above-mentioned grinding wheel dresser, an annular protrusion is arranged on the end face of the front flange of the motor seat, the annular protrusion extends into the dresser seat and is spaced apart from the rear end face of the rear bearing pressure pad, a first gap is formed between the annular protrusion and the rear end face of the rear bearing pressure pad, a second gap is arranged between the outer cylindrical surface of the rear bearing pressure pad and the inner wall of the dresser seat, a boss is arranged on the front end face of the rear bearing pressure pad, the boss is arranged in abutment with the rear bearing, a third gap is arranged between the front end face of the rear bearing pressure pad and the rear flange, the first gap, the second gap and the third gap are interconnected to form a labyrinth sealing structure.
[0017] The outstanding advantages of the utility model compared with the prior art are:
[0018] 1. The utility model adopts a motor direct drive structure, which can solve the problem of spindle beating and unstable force caused by the transmission mechanism driving the spindle to rotate in the prior art, resulting in lines on the surface of the trimmed grinding wheel;
[0019] 2. The structure in which screws are threaded in the threaded holes circumferentially distributed on the locking ring of the utility model can fine-tune the axial preload accuracy of the spindle, and can reduce the requirements for the machining accuracy and difficulty of the parts;
[0020] 3. The axial dimension of the diamond roller of the utility model is between 20-50 mm, the span between the diamond roller and the front bearing is short, the contact area with the grinding wheel is large during dressing, the dressing force is large, but the rigidity is enhanced. Description of the drawings:
[0021] Figure 1 It is a three-dimensional schematic diagram of the utility model;
[0022] Figure 2 It is a three-dimensional schematic diagram of the motor of the utility model after being disassembled;
[0023] Figure 3 yes Figure 2 Schematic cross-sectional view of ;
[0024] Figure 4 yes Figure 3 A magnified schematic diagram of part A;
[0025] Figure 5 yes Figure 3 A magnified schematic diagram of part B;
[0026] Figure 6 It is a schematic diagram of the main shaft of the utility model;
[0027] Figure 7 It is a schematic diagram of the motor base of the utility model;
[0028] Figure 8 It is a schematic diagram of the trimmer seat of the utility model;
[0029] Fig. 9 It is a schematic diagram of the front locking ring of the utility model;
[0030] Fig.10 It is a schematic diagram of the front end cover of the utility model.
[0031] In the figure: 1, spindle; 2, dresser seat; 3, diamond roller; 4, coupling; 5, motor; 6, motor seat; 7, cylindrical body; 8a, front flange; 8b, rear flange; 9, window; 10, cover plate; 11, shaft body; 12, first shaft body; 13, second shaft body; 14, third shaft body; 15, fourth shaft body; 16, first step surface; 17, second step surface; 18, third step surface; 19, spindle hole; 20, front bearing ; 21. Rear bearing; 22. Spacer sleeve; 23. Front locking ring; 24. Front end cover; 25. Annular flange; 26. Rear bearing retaining ring; 27. Rear bearing pressure pad; 28. Rear locking ring; 29. Roller pressure cover; 30. Roller guard; 31. Mounting flange; 32. Slide; 33. Sealing ring; 34. Annular groove; 35. Air pipe interface; 36. Annular protrusion; 37. First gap; 38. Second gap; 39. Third gap. Specific implementation method:
[0032] The present invention is further described below with specific embodiments:
[0033] like Figure 1-Figure 10 As shown, the utility model provides a grinding wheel dresser, which includes a main shaft 1, which is rotatably connected to a dresser seat 2 through a front bearing 20 and a rear bearing 21, and both ends of the main shaft 1 extend out of the front and rear ends of the dresser seat 2 respectively, a diamond roller 3 is arranged at the front end of the main shaft 1, and the rear end is connected to the rotating shaft of a motor 5 through a coupling 4, and the motor 5 is installed on the dresser seat 2 through a motor seat 6.
[0034] The utility model eliminates the traditional structure of driving the spindle 1 to rotate by belt drive, and adopts the direct drive mode of the motor 5 to drive the spindle 1 to rotate. In this way, the rotation accuracy of the spindle 1 can be improved, and the situation that the surface of the grinding wheel appears with lines after dressing due to the low rotation accuracy of the spindle 1 can be avoided, which ultimately affects the processing accuracy of the parts.
[0035] Further, if Figure 1 , Figure 3 and Figure 5 As shown, the motor seat 6 includes a cylindrical body 7, and a front flange 8a and a rear flange 8b are respectively extended radially outward at both ends of the cylindrical body 7, and the front flange 8a and the rear flange 8b are fixedly connected to the dresser seat 2 and the motor 5 by screws. The coupling 4 is located inside the cylindrical body 7.
[0036] In order to facilitate installation or maintenance, a window 9 is opened on the cylindrical body 7, and a cover plate 10 is arranged at the window 9. The cover plate 10 is connected to the cylindrical body 7 by screws.
[0037] It should be noted that the axial dimension of the diamond roller 3 of the utility model is between 20-50 mm, and the specific corresponding grinding wheel size can be any value within the above range. During dressing, the contact area with the grinding wheel is large, the dressing force is large, the span between the front bearing 20 is short, but the rigidity is still strong.
[0038] like Figure 4 As shown, the main shaft 1 of the utility model is a stepped shaft, including a shaft body 11, a first shaft body 12 and a second shaft body 13 are arranged at one end of the shaft body 11, and a third shaft body 14 and a fourth shaft body 15 are arranged at the other end. The diameter of the first shaft body 12 is larger than the diameters of the shaft body 11 and the second shaft body 13, a first stepped surface 16 is formed between the first shaft body 12 and the shaft body 11, a second stepped surface 17 is formed between the second shaft body 13 and the first shaft body 12, the diameter of the third shaft body 14 is smaller than the diameter of the shaft body 11, and a third stepped surface 18 is formed between the third shaft body 14 and the shaft body 11. The coupling 4 is arranged on the fourth shaft body 15.
[0039] like Figure 3 and Figure 6 As shown, the dresser seat 2 is provided with a spindle hole 19, the front bearing 20 is sleeved on the end of the shaft body 11 close to the first shaft body 12, and the rear bearing 21 is sleeved on the third shaft body 14. There are more than one front bearing 20 and one rear bearing 21. In this embodiment, there are two front bearings 20 and two rear bearings 21. The outer rings of the front bearings 20 and the rear bearings 21 are connected to the inner wall of the spindle hole 19 of the dresser seat 2, and the inner rings are connected to the spindle 1. The front bearings 20 and the rear bearings 21 are locked on the spindle 1 through the front locking device and the rear locking device.
[0040] Specifically, the front locking device can adopt a threaded locking or locking ring structure. The locking ring structure is as follows: it includes a spacer sleeve 22, a front locking ring 23, and a front stopper, which are arranged on the shaft body 11 at the rear end of the front bearing 20. The front locking ring 23 has a plurality of threaded holes distributed circumferentially. The screws are screwed into the threaded holes and abut against the end surface of the spacer sleeve 22. The front bearing 20, the spacer sleeve 22, and the front locking ring 23 are limited between the first step surface 16 and the front stopper.
[0041] Generally speaking, there are 10 threaded holes on the front locking ring 23, which are evenly distributed in the circumferential direction. The rotation accuracy of the spindle 1 can be fine-tuned by rotating the screw to adjust the length of the screw extending from the front locking ring 23. During the adjustment, a measuring instrument can be used.
[0042] The rear locking device may adopt a threaded locking or locking ring structure. The locking ring structure is as follows: it includes a rear bearing pressure pad 27 sleeved on the third shaft body 14, a rear locking ring 28, and a rear stopper. The rear locking ring 28 has a plurality of threaded holes distributed circumferentially. The screws are screwed into the threaded holes and abut against the end surface of the rear bearing pressure pad 27.
[0043] In addition, an annular protrusion 36 is provided on the end face of the front flange 8a of the motor seat 6 of the utility model, and the annular protrusion 36 extends into the dresser seat 2 and is spaced apart from the rear end face of the rear bearing pad 27. A first gap 37 is formed between the annular protrusion 36 and the rear end face of the rear bearing pad 27, and a second gap 38 is provided between the outer cylindrical surface of the rear bearing pad 27 and the inner wall of the dresser seat 2. A boss is provided on the front end face of the rear bearing pad 27, and the boss is arranged in abutment with the rear bearing 21. A third gap 39 is provided between the front end face of the rear bearing pad 27 and the rear bearing 21. The first gap 37, the second gap 38, and the third gap 39 are interconnected to form a labyrinth sealing structure, which effectively prevents particulate matter from entering the interior of the dresser seat 2 and causing damage to the bearing.
[0044] Furthermore, a rear bearing retaining ring 26 is provided on the third shaft body 14 between the third step surface 18 and the rear bearing 21. The rear bearing retaining ring 26, the rear bearing 21, the rear bearing pressure pad 27, and the rear locking ring 28 are limited between the third step surface 18 and the rear limiter.
[0045] Similarly, there are 10 threaded holes on the rear locking ring 28, which are evenly distributed in the circumferential direction. The rotation accuracy of the main shaft 1 can be fine-tuned by rotating the screw to adjust the length of the rear locking ring 28 from which the screw extends. During adjustment, a measuring instrument can be used.
[0046] It should be noted that, in the present invention, the front limit member and the rear limit member are both wire retaining rings.
[0047] In order to block one end of the spindle hole 19, the utility model is provided with a front end cover 24 at the front end of the spindle hole 19, and the front end cover 24 is fixed on the front end face of the dresser seat 2. An annular convex edge 25 is provided on the outside of the front end cover 24, and the annular convex edge 25 abuts against the end face of the dresser seat, and a sealing ring 33 is provided between the annular convex edge 25 and the first shaft body 12, and the outer circle of the sealing ring 33 contacts the front end cover 24, and the inner circle contacts the spindle 1 to achieve sealing, and an annular groove 34 is provided inside the front end cover 24, and an air pipe interface 35 connected with the annular groove 34 is provided on the outer circle of the front end cover 24, so that the airflow is always blown outward while the air is connected, effectively preventing the grinding wheel particles and roller particles from entering the front end cover 24 to damage the sealing effect of the sealing ring 33, thereby causing damage to the internal bearing of the dresser seat 2, and effectively improving the sealing effect and life of the mechanism.
[0048] The diamond roller 3 of the utility model is sleeved on the second shaft body 13 of the main shaft 1 , and a roller cover 29 is provided on the front end surface of the main shaft 1 . The diamond roller 3 is limited between the second step surface 17 and the roller cover 29 .
[0049] Specifically, a plurality of threaded holes are evenly distributed circumferentially on the front end surface of the main shaft 1, and through holes corresponding in number and position to the threaded holes are distributed on the roller cover 29, and screws pass through the through holes and are screwed into the threaded holes.
[0050] In order to prevent flying chips from flying out during the dressing process, a roller guard 30 is arranged on the outer side of the diamond roller 3, and a mounting plate is arranged on the roller guard 30, and the mounting plate is fixed on the dresser seat 2 by screws.
[0051] The utility model is installed on a machine tool, and the bottom left and right sides of the dresser seat 2 extend outward with mounting flanges 31, and mounting holes are provided on the mounting flanges 31. The utility model is connected to the corresponding slide 32 through the mounting flanges 31, and the slide 32 is driven by the driving mechanism to move and drive the utility model to reciprocate along a certain direction.
[0052] The above embodiment is only one of the preferred embodiments of the present utility model, and is not intended to limit the scope of implementation of the present utility model. Therefore, any equivalent changes made based on the shape, structure, and principle of the present utility model should be included in the protection scope of the present utility model.
Claims
1. A grinding wheel dresser, characterized in that: The invention comprises a main shaft (1), wherein the main shaft (1) is rotatably connected to a dresser seat (2) via a front bearing (20) and a rear bearing (21) which are arranged at a front and rear interval, and the two ends of the main shaft (1) extend out of the front and rear ends of the dresser seat (2) respectively, and a diamond roller (3) is arranged at the front end of the main shaft (1), and the rear end is connected to the rotating shaft of a motor (5) via a coupling (4), and the motor (5) is installed on the dresser seat (2) via a motor seat (6).
2. A grinding wheel dresser according to claim 1, characterized in that: The axial dimension of the diamond roller (3) is 20-50 mm.
3. A grinding wheel dresser according to claim 1, characterized in that: The main shaft (1) is a stepped shaft, comprising a shaft body (11), a first shaft body (12) and a second shaft body (13) being arranged at one end of the shaft body (11), and a third shaft body (14) and a fourth shaft body (15) being arranged at the other end; the diameter of the first shaft body (12) is larger than the diameters of the shaft body (11) and the second shaft body (13); a first stepped surface (16) is formed between the first shaft body (12) and the shaft body (11); a second stepped surface (17) is formed between the second shaft body (13) and the first shaft body (12); the diameter of the third shaft body (14) is smaller than the diameter of the shaft body (11); a third stepped surface (18) is formed between the third shaft body (14) and the shaft body (11).
4. A grinding wheel dresser according to claim 3, characterized in that: The dresser seat (2) is provided with a spindle hole (19); the front bearing (20) is mounted on the shaft body (11) near one end of the first shaft body (12); the rear bearing (21) is mounted on the third shaft body (14); the outer rings of the front bearing (20) and the rear bearing (21) are connected to the inner wall of the spindle hole (19) of the dresser seat (2); and the inner rings are connected to the spindle (1); the front bearing (20) and the rear bearing (21) are locked on the spindle (1) by a front locking device and a rear locking device, respectively.
5. A grinding wheel dresser according to claim 4, characterized in that: The front locking device comprises a spacer sleeve (22), a front locking ring (23), and a front stopper which are sequentially arranged on the shaft body (11) at the rear end of the front bearing (20); a plurality of threaded holes are circumferentially distributed on the front locking ring (23); screws are screwed into the threaded holes and abut against the end surface of the spacer sleeve (22); the front bearing (20), the spacer sleeve (22), and the front locking ring (23) are limited between the first step surface (16) and the front stopper.
6. A grinding wheel dresser according to claim 4 or 5, characterized in that: A front end cover (24) is fixedly arranged on the front end surface of the dresser seat (2), an annular convex edge (25) is arranged outside the front end cover (24), the annular convex edge (25) abuts against the end surface of the dresser seat, and a sealing ring (33) is arranged between the annular convex edge (25) and the first shaft body (12), the outer circle of the sealing ring (33) contacts the front end cover (24), and the inner circle contacts the main shaft (1) to achieve sealing, an annular groove (34) is arranged inside the front end cover (24), and an air pipe interface (35) connected with the annular groove (34) is arranged on the outer circle of the front end cover (24).
7. A grinding wheel dresser according to claim 4, characterized in that: The rear locking device comprises a rear bearing pressure pad (27) sleeved on the third shaft body (14), a rear locking ring (28), and a rear limiting member. The rear locking ring (28) is provided with a plurality of threaded holes distributed circumferentially, screws are screwed into the threaded holes and abut against the end surface of the rear bearing pressure pad (27), and the rear bearing (21), the rear bearing pressure pad (27), and the rear locking ring (28) are limited between the third step surface (18) and the rear limiting member.
8. A grinding wheel dresser according to claim 7, characterized in that: A rear bearing retaining ring (26) is provided on the third shaft body (14) between the third step surface (18) and the rear bearing (21).
9. A grinding wheel dresser according to claim 7, characterized in that: The motor seat (6) comprises a cylindrical body (7), and a front flange (8a) and a rear flange (8b) are respectively extended radially outward at both ends of the cylindrical body (7), and the front flange (8a) and the rear flange (8b) are fixedly connected to the dresser seat (2) and the motor (5) by screws respectively.
10. A grinding wheel dresser according to claim 8, characterized in that: An annular protrusion (36) is arranged on the end face of the front flange (8a) of the motor seat (6), the annular protrusion (36) extends into the dresser seat (2) and is spaced apart from the rear end face of the rear bearing pad (27), a first gap (37) is formed between the annular protrusion (36) and the rear end face of the rear bearing pad (27), a second gap (38) is arranged between the outer cylindrical surface of the rear bearing pad (27) and the inner wall of the dresser seat (2), a boss is arranged on the front end face of the rear bearing pad (27), the boss is arranged in contact with the rear bearing (21), a third gap (39) is arranged between the front end face of the rear bearing pad (27) and the rear flange (8b), the first gap (37), the second gap (38) and the third gap (39) are interconnected to form a labyrinth seal structure.