Six-axis CNC grinding equipment and grinding process for fiber cutting knife

Abstract

The invention relates to the technical field of grinding and polishing, and specifically to a six-axis CNC grinding device for a fiber cutting knife and a grinding process thereof. The device comprises a CNC table, two rows of motors symmetrically arranged above the CNC table, a control device driven by each motor, an annular grinding wheel arranged in each control device, a first folding frame for supporting a row of control devices, a concave folding frame for supporting a row of motors, a multi-axis linkage machine tool connected to the top control of the CNC table, a clamp supported and connected on the multi-axis linkage machine tool, and a blade fixed in the clamp. Compared with the traditional technology in which the cleaning mode of the stationary annular grinding wheel is performed only after the grinding and rotation of the annular grinding wheel is completed, the invention realizes that the cleaning wheel cleans the annular grinding wheel during the grinding work, so that the grinding surface on the annular grinding wheel always remains in a rough state during the work, thereby enhancing the grinding effect of the annular grinding wheel on the blade.

Description

Technical Field

[0001] The invention relates to the technical field of grinding and polishing, in particular to six-axis numerical control grinding equipment for a fiber cutting knife and a grinding process thereof. Background Art

[0002] The fiber cutting knife involves a blade processing step in the production and processing process. The fiber cutting knife is polished successively by grinding wheels of different types to prepare a fiber cutting knife that meets the specifications. The principle of grinding is that the rough grinding surface on the grinding wheel contacts the knife surface in a fast moving state, thereby rubbing off part of the metal on the knife surface, so that some metal particles will also adhere to the rough grinding surface of the grinding wheel. If the grinding wheel is not cleaned, the grinding surface will become smooth due to the filling of metal particles, so that the grinding effect of the grinding wheel will decrease. The traditional technology is to clean the grinding surface after the grinding wheel finishes working. However, in the process of grinding the tool with the grinding wheel, the grinding surface of the grinding wheel has already adhered to the rubbed metal particles. If the grinding surface can be cleaned simultaneously in the process of grinding the tool with the grinding wheel, the grinding wheel will always maintain the best grinding state to process the tool. Based on such a research and development concept, the present invention provides a six-axis CNC grinding device and a grinding process for a fiber cutting knife. Summary of the invention

[0003] The purpose of the present invention is to provide a six-axis CNC grinding device for a fiber cutting knife and a grinding process thereof to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a six-axis CNC grinding device for a fiber cutting knife, comprising a CNC table, two rows of motors symmetrically arranged above the CNC table, a control device driven by each motor, an annular grinding wheel arranged in each control device, a first folding frame for supporting a row of control devices, a concave folding frame for supporting a row of motors, a multi-axis linkage machine tool connected to the top control of the CNC table, a fixture supported and connected to the multi-axis linkage machine tool, and a blade fixed in the fixture, the concave folding frame is fixed on the CNC table, and one end of the first folding frame is fixed on the concave folding frame, and the blade is ground by contacting with the rotating annular grinding wheel.

[0005] The control device includes a motor shaft, a concave disk fixed at one end of the motor shaft, a plurality of unit pullers connected in an annular manner between the concave disk and the annular grinding wheel, a cleaning head for cleaning the grinding surface on the annular grinding wheel, a braking member transmission-connected between the motor shaft and the cleaning head, a sub-member transmission-connected between the unit puller and the cleaning head, and a sub-frame for supporting the cleaning head, the sub-member and the braking member, wherein the other end of the motor shaft is transmission-connected to the motor, and the sub-frame is fixed on the first folding frame.

[0006] The brake part includes a short shaft, an oblique shaft, a long gear, a horizontal shaft, a side gear and a large gear. A side gear is fixed at one end of the horizontal shaft, and the side gear and the large gear are meshingly connected. The motor shaft passes through the middle of the large gear. The other end of the horizontal shaft is meshingly connected with the annular bevel gear fixed on the short shaft through a fixed bevel gear, and one end of the short shaft is meshingly connected with the bevel gear fixed at one end of the oblique shaft through a fixed bevel gear. The other end of the oblique shaft is connected to the cleaning head through a fixed long gear. The short shaft, the oblique shaft and the horizontal shaft are respectively movably sleeved in three through holes opened on the sub-frame.

[0007] The cleaning head includes an adjusting shaft, an adjusting group, a neck shaft and a cleaning wheel, one end of the neck shaft is fixed at the middle of the cleaning wheel, the other end of the neck shaft is meshed and transmission-connected with a long gear on one side through a fixed gear, an adjusting group is transmission-connected between one end of the adjusting shaft and the neck shaft, the other end of the adjusting shaft is transmission-connected to the auxiliary part, the adjusting shaft is movably sleeved in a circular hole opened on the sub-frame, and the neck shaft slides through a column hole opened on the sub-frame.

[0008] The cleaning wheel is obliquely distributed on one side of the annular grinding wheel. The cleaning wheel comprises a truncated table-shaped rotating disk and bristles fixed on the outer wall of the disk. The rotating disk rotates to make the bristles clean the grinding surface of the annular grinding wheel.

[0009] The auxiliary parts include a telescopic column, an S-shaped buffer spring sheet, a folding plate frame, an L-shaped folding column and a push-pull ring tube. The telescopic column is distributed at one end of the L-shaped folding column, and an S-shaped buffer spring sheet is fixedly connected between the L-shaped folding column and the telescopic column. The push-pull ring tube is fixed at the other end of the L-shaped folding column, and the push-pull ring tube is connected to a plurality of unit pull members uniformly arranged inside. Both the L-shaped folding column and the telescopic column slide through two square holes provided on the folding plate frame. One end of the folding plate frame is fixed on the sub-frame. The telescopic column is connected to the gear meshing transmission fixed on the adjusting shaft by a row of teeth.

[0010] The adjustment group includes a traveling rack, a direction plate and a push cylinder. The push cylinder is fixedly sleeved on the neck shaft. The outer edge of one side of the push cylinder slides into a groove opened on the traveling rack. The direction plate slides through the plate hole opened on the traveling rack. The traveling rack and the gear fixed on the adjustment shaft are meshed and transmitted, and one end of the direction plate is fixed on the sub-frame.

[0011] The unit pulling member includes a push block, a moving shaft, a unit plate, a return spring and a unit frame. The unit frame includes an arc-shaped rack and a convex plate fixed at one end of the arc-shaped rack. The convex plate of the unit frame is fixed on the outer side wall of the concave disk. The arc-shaped rack of the unit frame is inserted into the arc-shaped column groove opened on the unit plate. One end of the unit plate is fixed on the back of the annular grinding wheel, and the front side of the annular grinding wheel is a grinding surface. One end of the return spring is fixed on the unit frame, and the other end is fixed on the unit plate. One end of the moving shaft is transmission-connected to the unit frame, and the other end hooks the push-pull ring tube. A push block is fixed on the unit frame.

[0012] The movable shaft portion includes a first support shaft, a bracket, a second support shaft, a roller shaft, an L-shaped lifting plate and a limiting roller, one end of the bracket is fixed on the unit plate, the second support shaft and the first support shaft are respectively movably sleeved in two through holes opened on the bracket, one end of the first support shaft is connected to the unit frame through a fixed gear meshing transmission, the other end of the first support shaft is connected to the unit frame through a fixed bevel gear meshing transmission and the bevel gear fixed at one end of the second support shaft, the other end of the second support shaft is connected to the fixed gear and a row of teeth meshing transmission arranged on the L-shaped lifting plate, one end of the L-shaped lifting plate slides through the square hole opened on the bracket, the roller shaft is movably sleeved in the through hole opened at the other end of the L-shaped lifting plate, one end of the roller shaft is fixed with a limiting roller, and the limiting roller is stuck in the annular groove opened on the inner side wall of the push-pull ring cylinder.

[0013] The six-axis CNC grinding process for the fiber cutting knife includes the following steps:

[0014] Step 1: Six annular grinding wheels are distributed around the blade, and two groups of two are relatively distributed on both sides of the blade. On the processing route of the annular grinding wheels, the blade first faces a group of annular grinding wheels for width measurement and large edge grinding. Specifically, the blade is transported between the two annular grinding wheels of the first group, and then the annular grinding wheel close to one side is rotated at a high speed to grind the contacted blade. After grinding, the blade is transported to the annular grinding wheel close to the other side, so that the other side of the blade is ground. After grinding the other side, the blade is transported to the center position between the two annular grinding wheels of the first group;

[0015] Step 2: The blade is transported between the two annular grinding wheels of the second group. The annular grinding wheels of the second group also perform polishing and fine grinding of the blade by contact, and the blade moves between the two annular grinding wheels of the second group in the same way as in step 1.

[0016] Step 3: The blade is conveyed between the two annular grinding wheels of the third group. The annular grinding wheels of the third group also grind the blade edge by contact, and the blade moves between the two annular grinding wheels of the third group in the same way as in step 1;

[0017] Step 4: When the blade contacts any high-speed rotating annular grinding wheel, the cleaning head will be automatically triggered to clean the grinding surface of the annular grinding wheel.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. Compared with the conventional technology in which the cleaning mode is performed on the stationary annular grinding wheel only after the annular grinding wheel has completed its grinding rotation, the present invention realizes that the cleaning wheel cleans the annular grinding wheel during the grinding work, so that the grinding surface on the annular grinding wheel always remains rough during the work, thereby enhancing the grinding effect of the annular grinding wheel on the blade.

[0020] 2. The present invention automatically triggers the cleaning operation only when the annular grinding wheel contacts the grinding blade. When the annular grinding wheel is in an idling stage, the cleaning wheel does not contact the annular grinding wheel, thereby effectively reducing the working time of the cleaning wheel and extending the service life of the cleaning wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the first folding frame structure.

[0023] Figure 3 Schematic diagram of the control device location.

[0024] Figure 4 This is a schematic diagram of the control structure.

[0025] Figure 5 It is a schematic diagram of the brake component structure.

[0026] Figure 6 It is a schematic diagram of the auxiliary component structure.

[0027] Figure 7 Schematic diagram of the folding plate frame structure.

[0028] Figure 8 Schematic diagram of the position of the annular grinding wheel.

[0029] Fig. 9 This is a schematic diagram of the adjustment group structure.

[0030] Fig.10 This is a schematic diagram of the unit pull structure.

[0031] Fig.11 It is a schematic diagram of the structure of the moving shaft.

[0032] Fig.12 This is a schematic diagram of the unit board structure.

[0033] In the figure: CNC table 1, motor 2, control device 3, annular grinding wheel 4, first folding frame 5, concave folding frame 6, multi-axis linkage machine tool 7, fixture 8, blade 9, motor shaft 10, concave plate 11, unit puller 12, cleaning head 13, brake 14, auxiliary part 15, sub-frame 16, short shaft 17, oblique shaft 18, long gear 19, horizontal shaft 20, side gear 21, large gear 22, adjustment shaft 23, adjustment group 24 , neck shaft 25, cleaning wheel 26, telescopic column 27, S-shaped buffer spring piece 28, folding plate frame 29, L-shaped folding column 30, push-pull ring tube 31, walking rack 32, direction plate 33, push cylinder 34, push block 35, moving shaft part 36, unit plate 37, return spring piece 38, unit frame 39, first support shaft 40, bracket 41, second support shaft 42, roller shaft 43, L-shaped lifting plate 44, and limiting roller 45. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the technical solutions in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figures 1 to 12 The present invention provides a technical solution: a six-axis CNC grinding device for a fiber cutting knife, comprising a CNC table 1, two rows of motors 2 symmetrically arranged above the CNC table 1, a control device 3 driven by each motor 2, an annular grinding wheel 4 arranged in each control device 3, a first folding frame 5 for supporting a row of control devices 3, a concave folding frame 6 for supporting a row of motors 2, a multi-axis linkage machine tool 7 connected to the top control of the CNC table 1, a fixture 8 supported and connected on the multi-axis linkage machine tool 7, and a blade 9 fixed in the fixture 8, the concave folding frame 6 is fixed on the CNC table 1, and one end of the first folding frame 5 is fixed on the concave folding frame 6, and the blade 9 is ground by contacting with the rotating annular grinding wheel 4.

[0036] refer to Figure 4 It is understood that the control device 3 includes a motor shaft 10, a concave disc 11 fixed at one end of the motor shaft 10, a plurality of unit pullers 12 annularly connected between the concave disc 11 and the annular grinding wheel 4, a cleaning head 13 for cleaning the grinding surface on the annular grinding wheel 4, a braking member 14 transmission-connected between the motor shaft 10 and the cleaning head 13, a sub-member 15 transmission-connected between the unit puller 12 and the cleaning head 13, and a sub-frame 16 for supporting the cleaning head 13, the sub-member 15 and the braking member 14. The other end of the motor shaft 10 is transmission-connected to the motor 2, and the sub-frame 16 is fixed on the first folding frame 5.

[0037] refer to Figure 5It is understood that the brake member 14 includes a short shaft 17, an inclined shaft 18, a long gear 19, a horizontal shaft 20, a side gear 21 and a large gear 22. A side gear 21 is fixed at one end of the horizontal shaft 20, and the side gear 21 and the large gear 22 are meshingly connected for transmission. The motor shaft 10 passes through the middle of the large gear 22. The other end of the horizontal shaft 20 is meshingly connected for transmission with a fixed bevel gear and an annular bevel gear fixed on the short shaft 17, and one end of the short shaft 17 is meshingly connected for transmission with a fixed bevel gear and a bevel gear fixed at one end of the inclined shaft 18. The other end of the inclined shaft 18 is meshingly connected for transmission with the cleaning head 13 through a fixed long gear 19. The short shaft 17, the inclined shaft 18 and the horizontal shaft 20 are respectively movably sleeved in three through holes opened on the sub-frame 16.

[0038] refer to Figure 6 It is understood that the cleaning head 13 includes an adjusting shaft 23, an adjusting group 24, a neck shaft 25 and a cleaning wheel 26, one end of the neck shaft 25 is fixed at the middle of the cleaning wheel 26, the other end of the neck shaft 25 is meshed and transmission connected with the long gear 19 on one side through a fixed gear, an adjusting group 24 is transmission connected between one end of the adjusting shaft 23 and the neck shaft 25, the other end of the adjusting shaft 23 is transmission connected to the auxiliary component 15, the adjusting shaft 23 is movably sleeved in a circular hole opened on the sub-frame 16, and the neck shaft 25 slides through the column hole opened on the sub-frame 16.

[0039] The cleaning wheel 26 is obliquely distributed on one side of the annular grinding wheel 4 , and includes a truncated cone-shaped rotating disk and bristles fixed on the outer wall of the disk. The rotating disk rotates so that the bristles clean the grinding surface of the annular grinding wheel 4 .

[0040] The motor 2 is a servo motor of the prior art. The motor 2 drives the motor shaft 10 to rotate. On the one hand, the motor shaft 10 drives the concave plate 11 to rotate, and then drives the annular grinding wheel 4 to rotate at high speed through the unit puller 12. On the other hand, the motor shaft 10 drives the side gear 21 through the large gear 22, and then the horizontal shaft 20 rotates to drive the short shaft 17, and then drives the long gear 19 through the inclined shaft 18. The long gear 19 drives the neck shaft 25, and then drives the cleaning wheel 26 to rotate. The annular grinding wheel 4 grinds and polishes the blade 9 during rotation, and the cleaning wheel 26 cleans the grinding surface of the annular grinding wheel 4 during rotation, and the contact part of the annular grinding wheel 4 moves in the same direction as the contact part of the cleaning wheel 26, for example Figure 6 The annular grinding wheel 4 rotates counterclockwise, and the cleaning wheel 26 rotates clockwise.

[0041] refer to Figure 6It is understood that the auxiliary component 15 includes a telescopic column 27, an S-shaped buffer spring piece 28, a folding plate frame 29, an L-shaped folding column 30 and a push-pull ring tube 31. The telescopic column 27 is distributed at one end of the L-shaped folding column 30, and the S-shaped buffer spring piece 28 is fixedly connected between the L-shaped folding column 30 and the telescopic column 27. The push-pull ring tube 31 is fixed at the other end of the L-shaped folding column 30. The push-pull ring tube 31 is connected to a plurality of unit pull members 12 uniformly arranged inside. The L-shaped folding column 30 and the telescopic column 27 both slide through two square holes opened on the folding plate frame 29. One end of the folding plate frame 29 is fixed on the sub-frame 16. The telescopic column 27 is connected to the gear meshing transmission connection fixed on the adjusting shaft 23 by setting a row of teeth.

[0042] The adjustment group 24 includes a traveling rack 32, a direction plate 33 and a push cylinder 34. The push cylinder 34 is fixedly sleeved on the neck shaft 25. The outer edge of one side of the push cylinder 34 slides into the groove opened on the traveling rack 32. The direction plate 33 slides through the plate hole opened on the traveling rack 32. The traveling rack 32 and the gear fixed on the adjustment shaft 23 are meshed and driven, and one end of the direction plate 33 is fixed on the sub-frame 16.

[0043] The unit puller 12 includes a push block 35, a movable shaft portion 36, a unit plate 37, a return spring piece 38 and a unit frame 39. The unit frame 39 includes an arc-shaped rack and a convex plate fixed at one end of the arc-shaped rack. The convex plate of the unit frame 39 is fixed on the outer wall of the recessed disk 11. The arc-shaped rack of the unit frame 39 is inserted into the arc-shaped column groove opened on the unit plate 37. One end of the unit plate 37 is fixed on the back of the annular grinding wheel 4, and the front side of the annular grinding wheel 4 is a frosted surface. One end of the return spring piece 38 is fixed on the unit frame 39, and the other end is fixed on the unit plate 37. One end of the movable shaft portion 36 is transmission connected to the unit frame 39, and the other end hooks the push-pull ring tube 31. The push block 35 is fixed on the unit frame 39.

[0044] The movable shaft portion 36 includes a first support shaft 40, a bracket 41, a second support shaft 42, a roller shaft 43, an L-shaped lifting plate 44 and a limiting roller 45. One end of the bracket 41 is fixed on the unit plate 37, and the second support shaft 42 and the first support shaft 40 are respectively movably sleeved in two through holes opened on the bracket 41. One end of the first support shaft 40 is meshingly connected with the unit frame 39 through a fixed gear, and the other end of the first support shaft 40 is meshingly connected with the bevel gear fixed at one end of the second support shaft 42 through a fixed bevel gear. The other end of the second support shaft 42 is meshingly connected with a row of teeth arranged on the L-shaped lifting plate 44 through a fixed gear. One end of the L-shaped lifting plate 44 slides through the square hole opened on the bracket 41, and the roller shaft 43 is movably sleeved in the through hole opened at the other end of the L-shaped lifting plate 44. A limiting roller 45 is fixed at one end of the roller shaft 43, and the limiting roller 45 is stuck in the annular groove opened on the inner side wall of the push-pull ring cylinder 31.

[0045] The six-axis CNC grinding process for the fiber cutting knife includes the following steps:

[0046] Step 1: Six annular grinding wheels 4 are distributed around the blade 9, and are relatively distributed on both sides of the blade 9 in groups of two. On the processing route of the annular grinding wheels 4, the blade 9 first faces a group of annular grinding wheels 4 for measuring width and sharpening the large edge. Specifically, the blade 9 is transported between the two annular grinding wheels 4 of the first group, and then the annular grinding wheel 4 close to one side is rotated at a high speed to grind the contacting blade 9. After grinding, the blade 9 is transported close to the annular grinding wheel 4 on the other side, so that the other side of the blade 9 is ground. After grinding the other side, the blade 9 is transported to the center position between the two annular grinding wheels 4 of the first group;

[0047] Step 2: The blade 9 is conveyed between the two annular grinding wheels 4 of the second group. The annular grinding wheels 4 of the second group also perform polishing and fine grinding of the blade 9 by contact. The movement of the blade 9 between the two annular grinding wheels 4 of the second group is the same as that of step 1.

[0048] Step 3: The blade 9 is conveyed between the two annular grinding wheels 4 of the third group. The annular grinding wheels 4 of the third group also grind the edge of the blade 9 by contact. The movement of the blade 9 between the two annular grinding wheels 4 of the third group is the same as that of step 1.

[0049] Step 4: When the blade 9 contacts any high-speed rotating annular grinding wheel 4 , the cleaning head 13 will be automatically triggered to clean the grinding surface of the annular grinding wheel 4 .

[0050] The equipment of the present invention can solve the coarse and fine grinding of multiple angles at one time, ensure that the cutting edge has no gaps without being blunted, and solve the shortcomings existing in the previous multi-faceted repeated grinding work. One machine can replace the previous operation of multiple machines.

[0051] During the contact process between the high-speed rotating annular grinding wheel 4 and the blade 9, the bristles on the cleaning wheel 26 contact the frosted surface of the annular grinding wheel 4, so that the bristles clean the frosted surface of the annular grinding wheel 4. If the cleaning wheel 26 is in a stationary state and contacts with the high-speed rotating annular grinding wheel 4, not only will cleaning fail, but the high-speed rotating annular grinding wheel 4 will even grind the bristles of the cleaning wheel 26, and the bristles that have been grinded and shortened will gradually separate from the frosted surface of the annular grinding wheel 4, and the cleaning wheel 26 will lose its cleaning function. Therefore, it is necessary to reduce the relative movement speed difference between the annular grinding wheel 4 and the cleaning wheel 26 to a level that does not cause the annular grinding wheel 4 to grind the bristles. For example, refer to Figure 6The annular grinding wheel 4 rotates counterclockwise at a fixed speed, and the circumference of the outer wall of the cleaning wheel 26 is half of the annular grinding wheel 4. If the cleaning wheel 26 rotates twice during each rotation of the annular grinding wheel 4, then the contact part of the cleaning wheel 26 and the contact part of the annular grinding wheel 4 are in a relatively static state when they are in contact, and the cleaning function cannot be achieved either. Therefore, the rotation speed of the cleaning wheel 26 of the present invention and the rotation speed of the annular grinding wheel 4 are matched to avoid this problem. On the basis of this speed matching, the cleaning wheel 26 can effectively clean the annular grinding wheel 4 at a higher or lower speed, and the annular grinding wheel 4 will not grind the bristles of the cleaning wheel 26, because the annular grinding wheel 4 and the cleaning wheel 26 are both rotating at high speed, and when the two are in contact, the contact part of the cleaning wheel 26 and the contact part of the annular grinding wheel 4 are dislocated and slid.

[0052] In addition, the cleaning operation will be automatically triggered when the annular grinding wheel 4 contacts the grinding blade 9. The specific principle is that when the annular grinding wheel 4 contacts the blade 9, the annular grinding wheel 4 first rotates a small angle relative to the concave disc 11 under the reaction of the contact surface, and then rotates synchronously with the concave disc 11. For example, Figure 6 Before the annular grinding wheel 4 contacts the blade 9, the concave plate 11 drives the annular grinding wheel 4 to rotate synchronously at a high speed through the unit puller 12. When the blade 9 contacts the annular grinding wheel 4, the obstruction of the blade 9 causes the annular grinding wheel 4 to stop, while the concave plate 11 continues to rotate to drive the unit puller 12. Specifically, the concave plate 11 drives the unit frame 39, and the unit frame 39 drives the push block 35 to move around a short distance. Then the push block 35 pushes the unit plate 37, and the unit plate 37 drives the annular grinding wheel 4, and then the annular grinding wheel 4 continues to rotate. That is to say, when the blade 9 contacts the annular grinding wheel 4, the unit frame 39 and the unit plate 37 are misaligned, and the entire misalignment causes The first support shaft 40 rotates, and then the L-shaped lifting plate 44 is transmitted through the second support shaft 42. The L-shaped lifting plate 44 moves to drive the limiting roller 45. The limiting roller 45 moves axially to drive the push-pull ring tube 31. Then, the L-shaped folding column 30 moves to drive the telescopic column 27 through the S-shaped buffer spring piece 28. The telescopic column 27 controls the rotation of the adjusting shaft 23 during movement, thereby driving the movement of the traveling rack 32. The push tube 34 continues to rotate with the neck shaft 25, but does not affect the movement of the traveling rack 32 to drive the axial movement of the push tube 34. Then, the neck shaft 25 moves axially to drive the cleaning wheel 26. The cleaning wheel 26 approaches and contacts the annular grinding wheel 4 under high-speed rotation.

[0053] 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. Six-axis CNC grinding equipment for fiber cutting knives, characterized by: The invention comprises a numerical control table (1), two rows of motors (2) symmetrically arranged above the numerical control table (1), a control device (3) driven by each motor (2), an annular grinding wheel (4) arranged in each control device (3), a first folding frame (5) for supporting a row of control devices (3), a concave folding frame (6) for supporting a row of motors (2), a multi-axis linkage machine tool (7) connected to the top of the numerical control table (1), a fixture (8) connected to the multi-axis linkage machine tool (7), and a blade (9) fixed in the fixture (8), wherein the concave folding frame (6) is fixed on the numerical control table (1), and one end of the first folding frame (5) is fixed on the concave folding frame (6), and the blade (9) is contacted with the rotating annular grinding wheel (4) to achieve grinding. The control device (3) comprises a motor shaft (10), a concave disc (11) fixed at one end of the motor shaft (10), a plurality of unit pullers (12) annularly connected between the concave disc (11) and the annular grinding wheel (4), a cleaning head (13) for cleaning the grinding surface on the annular grinding wheel (4), a brake member (14) drivingly connected between the motor shaft (10) and the cleaning head (13), a sub-member (15) drivingly connected between the unit puller (12) and the cleaning head (13), and a sub-frame (16) for supporting the cleaning head (13), the sub-member (15) and the brake member (14), the other end of the motor shaft (10) being drivingly connected to the motor (2), and the sub-frame (16) being fixed on the first folding frame (5); The brake member (14) comprises a short shaft (17), an inclined shaft (18), a long gear (19), a transverse shaft (20), a side gear (21) and a large gear (22); a side gear (21) is fixed to one end of the transverse shaft (20); the side gear (21) and the large gear (22) are meshed and connected in transmission; the motor shaft (10) passes through the middle of the large gear (22); the other end of the transverse shaft (20) is meshed and connected in transmission with a ring-shaped bevel gear fixed on the short shaft (17) through a fixed bevel gear; one end of the short shaft (17) is meshed and connected in transmission with a bevel gear fixed at one end of the inclined shaft (18) through a fixed bevel gear; the other end of the inclined shaft (18) is connected in transmission with the cleaning head (13) through a fixed long gear (19); the short shaft (17), the inclined shaft (18) and the transverse shaft (20) are respectively movably sleeved in three through holes opened on the sub-frame (16); The cleaning head (13) comprises an adjusting shaft (23), an adjusting group (24), a neck shaft (25) and a cleaning wheel (26); one end of the neck shaft (25) is fixed to the middle of the cleaning wheel (26); the other end of the neck shaft (25) is meshed and transmission-connected with a long gear (19) on one side through a fixed gear; an adjusting group (24) is transmission-connected between one end of the adjusting shaft (23) and the neck shaft (25); the other end of the adjusting shaft (23) is transmission-connected to the auxiliary component (15); the adjusting shaft (23) is movably sleeved in a circular hole provided on the sub-frame (16), and the neck shaft (25) slides through a column hole provided on the sub-frame (16); The auxiliary component (15) comprises a telescopic column (27), an S-shaped buffer spring sheet (28), a folding plate frame (29), an L-shaped folding column (30) and a push-pull ring tube (31). The telescopic column (27) is distributed on one end of the L-shaped folding column (30), and an S-shaped buffer spring sheet (28) is fixedly connected between the L-shaped folding column (30) and the telescopic column (27). The push-pull ring tube (31) is fixed on the other end of the L-shaped folding column (30). The push-pull ring tube (31) is connected to a plurality of unit pull members (12) uniformly arranged in a ring inside. The L-shaped folding column (30) and the telescopic column (27) are both slidably passed through two square holes provided on the folding plate frame (29). One end of the folding plate frame (29) is fixed on the sub-frame (16). The telescopic column (27) is provided with a row of teeth and is meshed and transmission-connected with a gear fixed on the adjustment shaft (23). The adjustment group (24) comprises a traveling rack (32), a direction plate (33) and a push cylinder (34); the push cylinder (34) is fixedly sleeved on the neck shaft (25); an outer edge of one side of the push cylinder (34) slides into a groove provided on the traveling rack (32); the direction plate (33) slides through a plate hole provided on the traveling rack (32); the traveling rack (32) and a gear fixed on the adjustment shaft (23) are meshed and connected for transmission; and one end of the direction plate (33) is fixed on the sub-frame (16).

2. The six-axis CNC grinding equipment for the fiber cutting knife according to claim 1 is characterized in that: The cleaning wheel (26) is obliquely distributed on one side of the annular grinding wheel (4), and comprises a truncated cone-shaped rotating disk and bristles annularly fixed on the outer wall of the disk, and the rotating disk rotates so that the bristles clean the grinding surface of the annular grinding wheel (4).

3. The six-axis CNC grinding equipment for the fiber cutting knife according to claim 1 is characterized in that: The unit puller (12) comprises a push block (35), a movable shaft portion (36), a unit plate (37), a return spring piece (38) and a unit frame (39). The unit frame (39) comprises an arc-shaped rack and a convex plate fixed at one end of the arc-shaped rack. The convex plate of the unit frame (39) is fixed to the outer wall of the concave plate (11). The arc-shaped rack of the unit frame (39) is inserted into an arc-shaped column groove provided on the unit plate (37). One end of the unit plate (37) is fixed to the back of the annular grinding wheel (4), and the front of the annular grinding wheel (4) is a grinding surface. One end of the return spring piece (38) is fixed to the unit frame (39), and the other end is fixed to the unit plate (37). One end of the movable shaft portion (36) is transmission-connected to the unit frame (39), and the other end is hooked on the push-pull ring tube (31). The push block (35) is fixed to the unit frame (39).

4. The six-axis CNC grinding equipment for the fiber cutting knife according to claim 3 is characterized in that: The movable shaft portion (36) comprises a first support shaft (40), a bracket (41), a second support shaft (42), a roller shaft (43), an L-shaped lifting plate (44) and a limiting roller (45); one end of the bracket (41) is fixed on the unit plate (37); the second support shaft (42) and the first support shaft (40) are respectively movably sleeved in two through holes provided on the bracket (41); one end of the first support shaft (40) is meshed and transmission-connected with the unit frame (39) via a fixed gear; the other end of the first support shaft (40) is meshed and transmission-connected with the unit frame (39) via a fixed bevel gear. The second support shaft (42) is meshed and connected to a bevel gear fixed at one end thereof; the other end of the second support shaft (42) is meshed and connected to a row of teeth arranged on an L-shaped lifting plate (44) via a fixed gear; one end of the L-shaped lifting plate (44) slides through a square hole provided on the bracket (41); the roller shaft (43) is movably sleeved in a through hole provided at the other end of the L-shaped lifting plate (44); a limiting roller (45) is fixed at one end of the roller shaft (43), and the limiting roller (45) is inserted into a ring groove provided on the inner side wall of the push-pull ring cylinder (31).

5. A six-axis CNC grinding process for a fiber cutting knife, used for the six-axis CNC grinding equipment for a fiber cutting knife according to claim 1, characterized in that: The following steps are involved: Step 1: Six annular grinding wheels (4) are distributed around the blade (9), and are arranged in pairs on both sides of the blade (9). On the processing route of the annular grinding wheels (4), the blade (9) first faces a group of annular grinding wheels (4) to measure the width and sharpen the large edge. Specifically, the blade (9) is transported between the two annular grinding wheels (4) of the first group, and then the annular grinding wheel (4) on one side is approached. The annular grinding wheel (4) rotates at a high speed to grind the blade (9) in contact. After grinding, the blade (9) is transported to the annular grinding wheel (4) on the other side, so that the other side of the blade (9) is ground. After grinding the other side, the blade (9) is transported to the center between the two annular grinding wheels (4) of the first group. Step 2: The blade (9) is transported between the two annular grinding wheels (4) of the second group. The annular grinding wheels (4) of the second group also perform polishing and fine grinding of the blade (9) by contact, and the blade (9) moves between the two annular grinding wheels (4) of the second group in the same manner as in step 1. Step 3: The blade (9) is conveyed between the two annular grinding wheels (4) of the third group, and the annular grinding wheels (4) of the third group also grind the edge of the blade (9) by contact, and the blade (9) moves between the two annular grinding wheels (4) of the third group in the same manner as in step 1; Step 4: When the blade (9) contacts any high-speed rotating annular grinding wheel (4), the cleaning head (13) is automatically triggered to clean the grinding surface of the annular grinding wheel (4).

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