CN111660149A - Grinding wheel clamping tool on automatic saw blade grinding machine - Google Patents

Abstract

The invention provides a grinding wheel clamping tool on an automatic saw blade grinding machine, which belongs to the field of electromechanical technology. Including the drive motor and grinding wheel, the clamping tool includes a positioning bushing, two chucks and two pressing pieces corresponding to the chucks one-to-one. The positioning bushing is fixedly connected with the output shaft of the driving motor. The middle part is fixedly provided with a positioning piece inserted between the two chucks, the two chucks are fixedly connected, the inner side of the chuck is provided with a positioning notch, and the positioning notch rolls a ball against the positioning piece. The plate is threadedly connected to the corresponding chuck, the grinding wheel is fixed between the two compression plates, the chuck and the positioning bush are connected by a number of spring columns, the spring columns are evenly distributed outside the positioning bush in the circumferential direction, and the positioning axis There is a movable gap between the sleeve and the chuck. The invention has the advantages of high grinding precision, good buffering effect and the like.

Description

Grinding wheel clamping tool on automatic saw blade grinding machine

technical field

The invention belongs to the field of electromechanical technology, and relates to a grinding wheel clamping tool on an automatic saw blade grinding machine.

Background technique

Disc saw blades for wood, stone and other processing are prone to tooth edge setback, deformation, uneven wear, etc. after a period of use, and need to be polished to repair the performance of the saw blade.

In the prior art, the grinding thickness of different tooth edges in the same saw blade is uniform. In order to avoid the damage of the grinding wheel to the saw blade, the thickness of a single grinding is also very small. circle), and gradually increase the grinding thickness to complete the grinding process of the saw blade. The unevenness of this method greatly weakens the grinding efficiency, and the adjustment process every time the grinding thickness is increased needs to be stopped. The operation is complicated and the structure is complex. It is not conducive to the repair work of the saw blade.

In fact, since the teeth of the saw blade wear differently during use, as long as the blade is sharp, its performance impact is not large, and it is not necessary to wear one by one to make the specifications, dimensions, and inclination of the teeth completely consistent.

SUMMARY OF THE INVENTION

The purpose of the present invention is to aim at the above-mentioned problems existing in the prior art, and to provide a grinding wheel clamping tool on an automatic saw blade grinding machine. Below, the buffer between the objects to be sanded can be realized.

The object of the present invention can be achieved through the following technical solutions: a grinding wheel clamping tool on an automatic saw blade grinding machine, comprising a drive motor and a grinding wheel, characterized in that the clamping tool includes a positioning shaft sleeve, two chucks and two The pressing pieces corresponding to the chucks one-to-one, the positioning bushing is fixedly connected with the output shaft of the drive motor, and the middle of the positioning bushing is fixedly provided with a positioning piece inserted between the two chucks, The two chucks are fixedly connected, the inner side of the chuck is provided with a positioning notch, and the positioning notch rolls a ball against the positioning sheet, and the pressing sheet is threaded on the corresponding chuck, so The grinding wheel is fixed between two pressing plates, and the chuck and the positioning shaft sleeve are connected by a number of spring columns, the spring columns are evenly distributed outside the positioning shaft sleeve, and the positioning shaft sleeve and the clamp There are active gaps between the discs.

Since the rigid contact between the saw blade to be processed and the grinding wheel may cause damage to the saw blade to be processed, and also shorten the service life of the grinding wheel, it is necessary to make the grinding wheel have a buffering effect in the process of contacting the saw blade to be processed. The position of the sheet requires precise positioning, which can only be achieved by a flexible connection to the grinding wheel.

The flexible connection of the grinding wheel cannot change the plane of the grinding wheel running track, otherwise the grinding accuracy will be seriously affected. In order to achieve this purpose, the grinding wheel is fixed by two chucks, and the positioning piece fixedly connected to the positioning bush can slide between the two chucks, so that the positioning piece and the positioning bush cannot move relative to the axis of the grinding wheel, only It can make the grinding wheel move in the radial direction of the positioning sleeve. In the process of relative movement between the two, the deformation resistance of the spring column needs to be overcome. Since the spring column can be compressed and bent, the grinding wheel can be subjected to large radial impact force and Buffer when rotating torque, so as to avoid relatively high-strength contact between the grinding wheel and the saw blade to be processed, and to protect the saw blade and grinding wheel to be processed, it can also improve the processing quality and eliminate the grinding dead angle at the bottom of the tooth blade.

Further, a locking nut located on the outer side of the pressing plate is threadedly connected to the chuck.

The lock nut locks the pressure plate holding the grinding wheel, which improves the reliability and firmness of the grinding wheel. Since the grinding wheel can be dislocated in its radial direction, the requirements for the installation accuracy of the grinding wheel are relatively reduced.

Further, the two chucks are fixedly connected by a plurality of dismounting bolts, and the dismounting bolts are located on the outer side of the positioning piece.

In addition to fixing the two chucks, the dismounting bolts are also used to limit the relative movement range of the positioning piece and the chuck, so as to control the maximum relative movement of the two.

Description of drawings

Figure 1 is a front view of the automatic saw blade sharpening machine.

FIG. 2 is a bottom view of FIG. 1 .

FIG. 3 is a plan view of FIG. 1 .

Figure 4 is a schematic plan view of the yarn wheel and the yarn wheel clamping tool.

FIG. 5 is a left side view of FIG. 4 .

FIG. 6 is a cross-sectional view in the direction A-A in FIG. 5 .

Fig. 7 is a cross-sectional view of the synchronizing shaft and the fixed sleeve.

8 is a cross-sectional view of the worm and the cam.

In the figure, 1, frame; 2, saw blade to be processed; 31, synchronous shaft; 32, drive motor; 33, grinding wheel; 34, synchronous gear; 35, worm; 36, fixed sleeve; 37, longitudinal return spring; 38 , cam; 39, torsion spring; 41, transmission gear; 42, servo motor; 51, positioning bushing; 52, chuck; 53, pressing piece; 54, positioning piece; 55, ball; 56, spring column; 57 , lock nut; 58, disassembly and assembly of bolts.

Detailed ways

The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

As shown in FIG. 1 , FIG. 2 , FIG. 3 , FIG. 7 and FIG. 8 , it includes a frame 1 , a saw blade 2 to be processed, a synchronous shaft 31 rotatably connected to the frame 1 , and a drive motor fixed on the frame 1 32. The grinding wheel 33 arranged on the output shaft of the driving motor 32 and the transposition mechanism for driving the saw blade to be processed to rotate. The transposition mechanism includes a synchronizing gear fixed on the synchronizing shaft. The teeth on the blade 2 correspond one by one, the frame 1 is rotatably connected with at least one worm 35 that meshes with the synchronizing gear 34, the synchronizing shaft 31 is slidably connected with a fixed sleeve 36, and the saw blade 2 to be processed is fixed in the fixed position. On the sleeve 36, the fixed sleeve 36 is splined on the synchronous shaft 31, a longitudinal return spring 37 is arranged between the fixed sleeve 36 and the synchronous shaft, a number of cams 38 are fixedly arranged on the worm 35, and the cams 38 are rotatably connected to the worm 35, The cam 38 and the worm 35 are connected by a torsion spring 39; the protruding part of the cam 38 can drive the saw blade 2 to be processed to move downward longitudinally.

One rotation of the worm 35 can drive the rotation angle of the synchronous gear 34 to be the same as the angle between the adjacent tooth edges on the saw blade 2 to be processed, so that each time the synchronous gear 34 rotates, it can just make the grinding wheel 33 and the saw blade 2 to be processed. The location switches to the adjacent location.

The saw blade 2 to be processed and the synchronizing gear 34 are coaxial, but each rotation of the saw blade 2 to be processed is accompanied by a certain range of longitudinal motion. That is to say, it is in a circular motion of slow down and rotation, vertical up and down in small increments, and vertical fast up and rotation.

The saw blade 2 to be processed moves down and rotates slowly: the convex point of the cam 38 squeezes the upper surface of the saw blade 2 to be processed, and is under the action of the torsion spring 39. The spring 39 is charged, the downward movement speed of the saw blade 2 to be processed is relatively slow, and the rotation is still synchronized with the synchronizing gear 34 ;

The saw blade 2 to be processed moves upward in a small amount in the longitudinal direction and stops: when the torsion spring 39 is pressed to the limit, the convex point of the cam 38 quickly passes over the upper surface of the saw blade 2 to be processed. During this process, the torsion spring 39 releases the torque to make the cam 38 rotates rapidly, and the worm 35 hardly rotates, the downward pressure of the gear to be processed is weakened instantly and moves upward, and is affected by the contact friction force of the saw blade 2 to be processed and the grinding wheel 33, and the upward movement of the saw blade 2 to be processed is not large; In the state, the grinding of a certain tooth edge of the saw blade 2 to be processed is completed, and the contact with the grinding wheel 33 needs to be disengaged.

The saw blade 2 to be processed moves up and rotates rapidly in the longitudinal direction: when the saw blade 2 to be processed moves up and is separated from the grinding position of the grinding wheel 33, there is a gap between the cam 38 and the saw blade 2 to be processed, and the gear to be processed is longitudinally affected. The action of the return spring 37 moves up quickly, after which the worm 35 drives the rotation of the gear to be processed to switch the processing position, that is, switch to the next tooth edge.

When the saw blade 2 to be processed moves down, the toothed edge gradually comes into contact with the grinding wheel 33, so that the toothed edge and the grinding wheel 33 are ground while being pressed. , the saw blade 2 to be processed is located above the grinding position of the grinding wheel 33, and the two are not in contact at this time, that is to say, the horizontal plane where the plane of the grinding wheel 33 and the axis of the grinding wheel 33 intersect is located below the horizontal plane of the saw blade 2 to be processed.

It is not difficult to see that in this way, the structure is very simple, but it can meet the needs of processing the saw blade 2 to be processed and the need to switch the processing parts, and during the grinding process, the grinding wheel 33 is in pressing contact with the tooth edge part, avoiding The grinding difficulty caused by the different wear of the tooth edges in different parts during use. In the existing method, the grinding position of the grinding wheel 33 and the grinding thickness of the tooth edges are balanced, so that the tooth edges with less wear during use are over-ground. However, the tooth edges that are worn more during use have not been ground to the standard or are not up to standard.

In this solution, the servo motor 42 can continuously operate at a certain speed to realize the corresponding action. In comparison, the jog method has problems such as large accumulation of errors, low precision, and high control difficulty, while the continuous operation method The processing of the saw blade to be processed can be completed at one time, with high precision, simple control and convenient operation.

There are two worms 35, and the two worms 35 are symmetrically distributed on both sides of the synchronous gear 34. A transmission gear 41 is fixed on the two worms 35. The two transmission gears 41 mesh with each other. One of the worms 35 is connected to a servo motor. 42 are connected. The synchronous and reverse rotation of the two worms 35 can make the synchronous shaft 31 rotate with high precision and stability, and can avoid the problem of inaccurate positioning of the synchronous shaft 31 caused by the installation gap, because the two worms 35 can make the synchronous gear 34 Always clamped.

An inclination angle between the axis of the grinding wheel 33 and the axis of the saw blade 2 to be processed is between 80° and 85°. On the one hand, the inclination angle is the inclination angle of the fitting tooth edge, and on the other hand, the cutting blade 2 can be separated from the grinding wheel 33 without causing damage to the cutting edge.

As shown in Figure 4, Figure 5 and Figure 6, the grinding wheel 33 is connected to the output shaft of the driving motor 32 through a clamping tool capable of buffering the grinding wheel 33; the clamping tool includes a positioning sleeve 51, two chucks 52 and Two pressing pieces 53 corresponding to the chucks 52 one-to-one, the positioning bushing 51 is fixedly connected with the output shaft of the drive motor 32 , and the middle of the positioning bushing 51 is fixedly arranged to be inserted between the two chucks 52 . The positioning piece 54, the two chucks 52 are fixedly connected, the inner side of the chuck 52 is provided with a positioning notch, and the positioning notch rolls a ball 55 against the positioning piece 54, and the pressing piece 53 is threadedly connected to the corresponding On the chuck 52, the grinding wheel 33 is fixed between the two pressing pieces 53, and the chuck 52 and the positioning bushing 51 are connected by a number of spring columns 56, and the spring columns 56 are evenly distributed outside the positioning bushing 51 in the circumferential direction, There is a movable gap between the positioning sleeve 51 and the chuck 52 .

Since the rigid contact between the saw blade 2 to be processed and the grinding wheel 33 may cause damage to the saw blade 2 to be processed, and also shorten the service life of the grinding wheel 33, the grinding wheel 33 needs to have a buffer in the process of contacting the saw blade 2 to be processed. However, the position of the saw blade 2 to be processed needs to be precisely positioned, which can only be achieved by flexibly connecting the grinding wheel 33 .

The flexible connection of the grinding wheel 33 cannot change the plane of the running track of the grinding wheel 33, otherwise, the grinding precision will be seriously affected. In order to achieve this purpose, the grinding wheel 33 is fixed by two chucks 52, and the positioning piece 54 fixedly connected to the positioning sleeve 51 can slide between the two chucks 52, so that the positioning piece 54 and the positioning sleeve 51 cannot Movement relative to the axial direction of the grinding wheel 33 can only make the grinding wheel 33 move in the radial direction of the positioning sleeve 51. In the process of relative movement between the two, the deformation resistance of the spring column 56 needs to be overcome. Since the spring column 56 can be compressed and bent, So that the grinding wheel 33 can be buffered when subjected to a large radial impact force and rotational torque, so as to avoid relatively high-strength contact between the grinding wheel 33 and the saw blade 2 to be processed, and to protect the saw blade 2 and the grinding wheel 33 to be processed, it can also be Improve the processing quality and eliminate the grinding dead angle at the bottom of the tooth blade.

The clamping plate 52 is screwed with a locking nut 57 located outside the pressing piece 53 . The locking nut 57 locks the pressing piece 53 holding the grinding wheel 33 to improve the reliability and firmness of the grinding wheel 33. Since the grinding wheel 33 can be displaced in its radial direction, the requirements for the installation accuracy of the grinding wheel 33 are relatively reduced. .

The two chucks 52 are fixedly connected by a number of dismounting bolts 58 , and the dismounting bolts 58 are located on the outer side of the positioning piece 54 . In addition to fixing the two chucks 52, the dismounting bolts 58 are also used to limit the relative movement range of the positioning piece 54 and the chuck 52, so as to control the maximum relative movement of the two.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention pertains can make various modifications or additions to the described specific embodiments or substitute in similar manners, but will not deviate from the spirit of the present invention or go beyond the definitions of the appended claims range.

Claims (3)

1. A grinding wheel clamping tool on an automatic saw blade grinding machine, comprising a frame (1) and a grinding wheel (33), characterized in that the clamping tool comprises a positioning shaft sleeve (51), two chucks (52) and Two pressing pieces (53) corresponding to the chuck (52) one-to-one, the positioning bushing (51) and the output shaft of the driving motor (32) are fixedly connected, and the positioning bushing (51) is The middle part is fixedly provided with a positioning piece (54) inserted between two chucks (52), the two chucks (52) are fixedly connected, and the inner side of the chuck (52) is provided with a positioning notch, so Balls (55) abutting on the positioning sheet (54) are rolled in the positioning recess, the pressing sheet (53) is screwed on the corresponding chuck (52), and the grinding wheel (33) is fixed on the two sides. Between the pressing pieces (53), the chuck (52) and the positioning bushing (51) are connected by a plurality of spring columns (56), and the spring columns (56) are evenly distributed on the positioning bushing in the circumferential direction In addition to (51), there is a movable gap between the positioning sleeve (51) and the chuck (52). 2 . The grinding wheel clamping tool on an automatic saw blade grinding machine according to claim 1 , wherein the clamping plate ( 52 ) is threadedly connected with a locking nut ( 57 ) located outside the pressing plate ( 53 ). 3 . 3. The grinding wheel clamping tool on an automatic saw blade grinding machine according to claim 1 or 2, wherein the two chucks (52) are fixedly connected by a plurality of disassembly bolts (58), and the disassembly and assembly bolts (58) The mounting bolt (58) is located on the outside of the positioning piece (54).

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