CN216706133U - Cutter clamping device and vibration broaching machine - Google Patents

Abstract

The utility model relates to a cutter clamping device and a vibration broaching machine. The cutter clamping device comprises a cutter clamping seat, a cutter clamping mechanism and a vibration mechanism. One end of the knife holder seat is provided with a mounting hole. One end of the cutter clamping mechanism is slidably arranged in the mounting hole in a penetrating way. The cutter clamping mechanism is provided with a clamping part with adjustable size. The clamping part is used for clamping the broach and enabling the broaching direction of the broach to be consistent with the central axis direction of the mounting hole. The vibration mechanism is connected with the cutter clamping mechanism and is controlled to provide vibration force for driving the cutter clamping mechanism to vibrate back and forth along the central axis direction of the mounting hole. The arrangement of the vibration mechanism can improve the cutting efficiency of the broach and the durability of the broach, so that the broach can have long service life and high cutting efficiency.

Description

Cutter clamping device and vibration broaching machine

Technical Field

The utility model relates to the technical field of broaching machine manufacturing, in particular to a cutter clamping device and a vibration broaching machine.

Background

The broaching machine is used as metal processing equipment, straight-line uniform broaching speed is adopted by the broaching tool in a common use process, and uniform extrusion is adopted by the broach teeth and a processed object in a cutting process of the broaching tool, so that the cutting edge part of the broaching tool is easy to wear, the local temperature is too high, the durability and the cutting efficiency of the broaching tool are reduced, and the use cost and the broaching processing efficiency of the broaching machine are influenced.

SUMMERY OF THE UTILITY MODEL

Accordingly, it is necessary to provide a clamping device and a vibration broaching machine which can prolong the service life of the broach and improve the cutting efficiency, aiming at the problems of short service life and low cutting efficiency of the broach of the conventional broaching machine.

A knife clamping device comprises a knife clamping seat, a knife clamping mechanism and a vibration mechanism;

one end of the knife holder seat is provided with a mounting hole;

one end of the cutter clamping mechanism can be slidably arranged in the mounting hole in a penetrating way; the cutter clamping mechanism is provided with a clamping part with adjustable size; the clamping part is used for clamping a broach, and the broaching direction of the broach is consistent with the central axis direction of the mounting hole;

the vibration mechanism is connected with the cutter clamping mechanism and is controlled to provide vibration force for driving the cutter clamping mechanism to vibrate in a reciprocating mode along the central axis direction of the mounting hole.

In some embodiments, the vibration mechanism comprises a vibration driving part, a vibration disc and a vibration block fixedly connected with the knife clamping mechanism;

the vibration disc is rotatably arranged on the knife holder seat and protrudes out of one end of the knife holder seat, which is provided with the mounting hole; a vibration part is arranged on the surface of one side of the vibration disc, which deviates from or faces the mounting hole, along the circumferential direction; one side of the vibration part, which is far away from the vibration disk, is provided with a vibration surface which undulates along the circumferential direction of the vibration disk;

the vibrating block is at least partially stacked with the vibrating disk; a matching part which is in slidable contact with the vibration surface is arranged on the surface of one side, facing the vibration disk, of the vibration block;

the vibration driving piece is used for driving the vibration disc to rotate so as to drive the matching part to vibrate in a reciprocating mode in the direction of the central axis of the mounting hole.

In some embodiments, the vibrating part is a plurality of vibrating teeth arranged at intervals along the circumferential direction of the vibrating disk; the plurality of vibration teeth are radially arranged around the central axis of the vibration disc; the matching part is a convex column arranged on one side of the vibration block facing the vibration disc; in the circumferential direction of the vibration disk, the size of one end, away from the vibration block, of the convex column is smaller than the width of a tooth groove between every two adjacent vibration teeth; or

The vibration part is a vibration ring arranged along the circumferential direction of the vibration disk; one side of the vibration ring, which is far away from the vibration disk, is provided with the vibration surface; the matching part is a convex column which can be slidably abutted against the vibration surface; or

The vibration part is an annular groove formed on the surface of one side, facing the vibration block, of the vibration disc along the circumferential direction of the vibration disc; the bottom surface of the annular groove is used as the vibration surface and is a zigzag surface which is fluctuated along the circumferential direction of the vibration disk; the matching part is a convex column which extends into the annular groove and is slidably abutted against the vibration surface.

In some of these embodiments, the vibration mechanism further comprises a first resilient member; the first elastic piece is used for providing an elastic force for driving the vibration block to move along the direction towards the vibration disk so as to enable the matching part to be slidably abutted against the vibration surface.

In some embodiments, the part of the knife clamping mechanism outside the mounting hole is provided with a clamping surface facing the mounting hole; the clamping surface extends along the circumferential direction of the mounting hole; the vibrating block is positioned on one side of the vibrating disk facing the mounting hole; the first elastic piece is a belleville spring; the first elastic piece is clamped between the clamping surface and one side surface of the tool holder seat, which is provided with the mounting hole.

In some of these embodiments, the vibration mechanism further comprises a second elastic member; the second elastic piece is used for providing an elastic restoring force for driving the cutter clamping mechanism to move along the direction opposite to the elastic force direction of the first elastic piece; the elastic force provided by the first elastic member is greater than the elastic restoring force provided by the second elastic member.

In some of these embodiments, the second resilient member is a belleville spring; the knife holder comprises a base and a bracket arranged on the base; the bracket is provided with the mounting hole penetrating through the bracket;

the knife clamping device also comprises a locking piece; one end of the cutter clamping mechanism penetrates through the mounting hole and is connected with the locking piece; the second elastic piece is sleeved on one end, facing the base, of the support, of the cutter clamping mechanism; the locking piece is abutted against the bracket through the second elastic piece.

In some of these embodiments, the vibration mechanism is plural; the vibration mechanisms are arranged at intervals along the circumferential direction of the mounting hole and are used for providing vibration force for synchronously driving the cutter clamping mechanism to vibrate along the central axis direction of the mounting hole; and/or

The cutter clamping device also comprises an axial limiting piece; the axial limiting piece is installed on the tool holder seat and used for limiting the circumferential position of the vibrating block along the installation hole.

In some of these embodiments, the vibration mechanism is an ultrasonic vibration mechanism; the ultrasonic vibration mechanism comprises an ultrasonic generator and an ultrasonic transducer connected with the cutter clamping mechanism; the ultrasonic generator is connected with the ultrasonic transducer and used for driving the ultrasonic transducer to work so as to drive the cutter clamping mechanism to vibrate in a reciprocating mode along the direction of the central axis of the mounting hole.

A vibration broaching machine comprises a machine body, the cutter clamping device and a broaching tool; the knife holder seat is arranged on the lathe bed; the broach is clamped in the clamping part.

According to the broaching device and the vibration broaching machine, the broaching direction of the broaching tool is consistent with the central axis direction of the mounting hole, so that when the vibration mechanism provides vibration force for the broaching mechanism, the broaching mechanism can be driven to drive the broaching tool to vibrate in a reciprocating manner along the broaching direction of the broaching tool. When a workpiece needs to be broached by using a vibrating broaching machine, the broaching tool slightly vibrates in the broaching direction, the cutting edge part of the broaching tool cannot be always in extrusion contact with the surface of the workpiece in the whole broaching process, so that cooling liquid can easily enter between the cutting edge part of the broaching tool and the surface of the workpiece, the rise of cutting temperature is reduced, the probability of abrasion and corrosion of the broaching tool is reduced, the wear resistance and the corrosion resistance of the broaching tool are improved, and the durability of the broaching tool is higher. Further, the broaching tool which generates micro-vibration in the broaching direction is adopted to carry out vibration broaching on the workpiece, so that the cutting force can be reduced to 1/5-1/10 of conventional cutting, and the broaching efficiency is improved. Therefore, the arrangement of the cutter clamping device can effectively improve the cutting efficiency of the broach and the durability of the broach, so that the broach can have both longer service life and higher cutting efficiency.

Drawings

FIG. 1 is a schematic view of a knife clamping device according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the knife clamping assembly shown in FIG. 1;

fig. 3 is a top view of the knife clamping device shown in fig. 1.

Description of the reference symbols: 100. a knife clamping device; 110. a knife holder seat; 111. mounting holes; 112. a base; 113. a support; 120. a knife clamping mechanism; 121. a clamping part; 122. a clamping surface; 130. a vibration mechanism; 131. a vibrating drive member; 132. vibrating the disc; 1321. a vibrating section; 133. vibrating the block; 1331. a fitting portion; 134. a speed reducer; 135. a first elastic member; 136. a second elastic member; 140. a locking member; 200. and (4) broaching.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

When an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present, unless otherwise specified. It will also be understood that when an element is referred to as being "between" two elements, it can be the only one between the two elements, or one or more intervening elements may also be present.

Where the terms "comprising," "having," and "including" are used herein, another element may be added unless an explicit limitation is used, such as "only," "consisting of … …," etc. Unless mentioned to the contrary, terms in the singular may include the plural and are not to be construed as being one in number.

The utility model provides a cutter clamping device and a vibration broaching machine. Wherein, the vibration broaching machine comprises a machine body, a cutter clamping device and a broaching tool. The cutter clamping device is arranged on the lathe bed and used for clamping and positioning the broach. Specifically, the vibration broaching machine further comprises a positioning fixture arranged on the machine body, and the positioning fixture is used for positioning a workpiece so as to facilitate broaching of the workpiece by a subsequent broaching tool.

Fig. 1 and 2 show a structure of a clamping device 100 for adjusting the height of a broaching tool 200 according to an embodiment of the present invention. For the purpose of illustration, the drawings show only the structures associated with the embodiments.

Referring to fig. 1 and 2, a knife clamping device 100 according to a preferred embodiment of the present invention includes a knife clamping base 110, a knife clamping mechanism 120 and a vibrating mechanism 130.

The toolholder seat 110 primarily serves a supporting and connecting function. In the vibration broaching machine, the holder base 110 is mounted to a bed to mount the insert clamping device 100 to the bed. One end of the tool holder is provided with a mounting hole 111. Wherein, the mounting hole 111 is provided at one end of the clamping device 100 for mounting the broach 200, for example, in a vertical broaching machine, the mounting hole 111 is opened at the top of the seat of the broach 200.

One end of the knife clamping mechanism 120 is slidably inserted into the mounting hole 111. The clamping mechanism 120 has a clamping portion 121 with an adjustable size. The clamping portion 121 is used to clamp the broach 200 and make the broaching direction of the broach 200 coincide with the central axis direction of the mounting hole 111. Thus, the central axis direction of the mounting hole 111 coincides with the longitudinal direction (i.e., the broaching direction) of the broaching tool 200, and in a vertical broaching machine, for example, the mounting hole 111 is a vertical hole.

The cutter clamping mechanism 120 is a combined structure formed by a plurality of parts, and the plurality of parts are matched with each other to realize clamping and dismounting of the broach 200; the holding portion 121 is a virtual space, and the size of the holding portion 121 can be adjusted by changing the distance or structure between the plurality of components constituting the virtual space. Specifically, when the size of the clamping portion 121 is adjusted to be small, the broach 200 may be clamped and positioned in the clamping portion 121, and when the size of the clamping portion 121 is adjusted to be large, the clamping portion 121 releases the broach 200, so as to facilitate the removal of the broach 200.

The vibration mechanism 130 is connected to the clamping mechanism 120 and is controlled to provide a vibration force for causing the clamping mechanism 120 to vibrate back and forth in the direction of the central axis of the mounting hole 111. In practical use, the vibration mechanism 130 can provide a vibration force for the tool clamping mechanism 120 to drive the tool clamping mechanism 120 to vibrate back and forth along the central axis direction of the mounting hole 111, so as to drive the broaching tool 200 to vibrate back and forth along the broaching direction thereof, thereby enabling the vibration broaching machine to realize vibration broaching.

In the process of performing vibration broaching on a workpiece by using the vibration broaching machine, the broaching tool 200 generates micro-vibration in the broaching direction, so that the enlarged cutting edge part can not be always contacted with the surface of the workpiece surface in the whole broaching process, cooling liquid can easily enter between the pulled cutting edge part and the surface of the workpiece in the broaching processing process, the rise of cutting temperature is reduced, the probability that the broaching tool 200 is abraded and corroded is reduced, the wear resistance and the corrosion resistance of the broaching tool 200 are improved, the durability of the broaching tool 200 is higher, and the service life of the broaching tool 200 is prolonged.

Further, when the broaching tool 200 generating minute vibration in the broaching direction is used to perform vibration broaching on a workpiece, the cutting force can be reduced to 1/5 to 1/10 of the conventional cutting force, which is beneficial to improving the broaching efficiency. Therefore, the arrangement of the knife clamping device 100 can effectively improve the cutting efficiency of the broach 200 and the durability of the broach 200, so that the broaching can be performed with both longer service life and higher cutting efficiency.

In addition, since the broaching tool 200 performs vibration broaching on the surface of the workpiece, the cutting fluid more easily enters between the cutting edge portion of the broaching tool 200 and the surface of the workpiece, the cooling effect and the lubricating effect of the cutting fluid are promoted, the surface roughness of the surface of the workpiece after machining is reduced, the broaching machining accuracy is improved, and a machined surface with low residual stress can be obtained. And by adopting the vibration broaching mode, the chip removal performance in the broaching machining process can be improved, accumulated chip lumps are eliminated, and the burr removal is facilitated.

In one embodiment, the vibration mechanism 130 is an ultrasonic vibration mechanism. The ultrasonic vibration mechanism includes an ultrasonic generator (not shown) and an ultrasonic transducer (not shown) connected to the clamping mechanism 120. The ultrasonic generator is connected to the ultrasonic transducer, and is configured to drive the ultrasonic transducer to work so as to drive the knife clamping mechanism 120 to vibrate back and forth along the central axis of the mounting hole 111. When the vibration frequency needs to be changed, the ultrasonic generator can generate ultrasonic waves with different frequencies. In the actual use process, the ultrasonic signal generated by the ultrasonic generator controls the knife clamping mechanism 120 to drive the broaching tool 200 to vibrate.

In another embodiment, the vibration mechanism 130 includes a vibration driver 131, a vibration plate 132, and a vibration block 133 fixedly connected to the knife clamping mechanism 120. The vibration plate 132 is rotatably installed on the holder 110 and protrudes from an end of the holder 110 where the mounting hole 111 is formed. A side surface of the vibration disk 132 facing away from or toward the mounting hole 111 is provided with a vibration portion 1321 in a circumferential direction. The side of the vibration portion 1321 facing away from the vibration disk 132 has a vibration surface (not shown) that undulates in the circumferential direction of the vibration disk 132. The vibration surface can be a raised and lowered circumferential curved surface or a raised and lowered circumferential bent surface.

The vibration mass 133 is at least partially stacked with the vibration plate 132. A side surface of the vibration block 133 facing the vibration disk 132 is provided with a fitting portion 1331 slidably contacting the vibration surface. The vibration driving member 131 is used for driving the vibration disc 132 to rotate, so as to drive the matching portion 1331 to vibrate back and forth along the central axis direction of the mounting hole 111. Specifically, the vibration driving member 131 is a servo motor, and an output shaft of the vibration driving member 131 is in transmission connection with the vibration disc 132 through a speed reducer 134 to drive the vibration disc 132 to rotate.

When the vibration broaching machine is a vertical broaching machine, the vibration block 133 may be located above the vibration plate 132 or below the vibration plate 132. In practical application, when the vibration driving element 131 drives the vibration disk 132 to rotate, the matching portion 1331 slides on the vibration surface along the circumferential direction of the vibration disk 132, so that the matching portion 1331 is pushed by the fluctuating vibration surface to drive the broach clamping mechanism 120 to vibrate back and forth along the central axis direction of the mounting hole 111, thereby facilitating subsequent vibration broaching of the broach 200 clamped in the clamping portion 121, and the vibration mechanism 130 is a mechanical vibration mechanism 130.

Further, in one embodiment, the vibrating portion 1321 is a plurality of vibrating teeth disposed at intervals along the circumference of the vibrating disk 132. A plurality of vibratory teeth are radially disposed about the central axis of the vibratory pan 132. The fitting portion 1331 is a protrusion disposed on one side of the vibration block 133 facing the vibration disk 132. In the circumferential direction of the vibration disk 132, the dimension of the convex column far away from one end of the vibration block 133 is smaller than the width of the tooth groove between two adjacent vibration teeth. Thus, the surfaces of the plurality of vibration teeth form a wavy vibration surface along the circumferential direction of the vibration plate 132.

Keep away from the projection vibrating mass 133 one end size set up to be less than the tooth's socket width between two adjacent vibration teeth to guarantee whether the projection can stretch into to the tooth's socket between two adjacent vibration teeth, when guaranteeing that the projection is in the vibration face along the circumferential slip of vibration dish 132, can stretch into to the tooth's socket between two adjacent vibration teeth in, in order to guarantee the vibration effect.

Further, in another embodiment, the vibrating portion 1321 is a vibrating ring disposed along a circumferential direction of the vibrating disk 132. The vibration ring may be fixed to the vibration plate 132 by welding, screwing, clamping, or the like. The side of the vibration ring facing away from the vibration plate 132 has a vibration surface. The fitting portion 1331 is a convex pillar slidably abutting against the vibration surface. The vibrating portion 1321 is provided as a vibrating ring, which can reduce the difficulty in processing the vibrating portion 1321 and the vibrating disk 132, and further simplify the processing of the knife clamping device 100.

Further, in still another embodiment, the vibration portion 1321 is an annular groove formed on a surface of the vibration disk 132 on a side facing the vibration block 133 along a circumferential direction of the vibration disk 132. The bottom surface of the annular groove serves as a vibration surface, and is a curved surface that undulates in the circumferential direction of the vibration disk 132. The fitting portion 1331 is a convex pillar extending into the annular groove and slidably abutting against the vibration surface.

In the above embodiment, the protruding columns may be protruding structures formed on the vibration plate 132 by welding, machining, casting, or the like, or may be rod-shaped parts (e.g., bolts, rivets, pins, etc.) mounted on the vibration plate 132 by screwing, clipping, or the like.

Of course, in the embodiment of the present invention, the structures of the vibrating portion 1321 and the fitting portion 1331 are not limited to those in the above-described embodiment, and may be other structural forms capable of realizing the reciprocating vibration of the knife clamping mechanism 120, which are not listed again.

Referring to fig. 1 and fig. 2 again, further, in some embodiments, the vibration mechanism 130 further includes a first elastic element 135. The first elastic element 135 is used to provide an elastic force for driving the vibration block 133 to move in a direction toward the vibration disk 132, so that the fitting portion 1331 is slidably abutted against the vibration surface. The first elastic element 135 may be a metal spring, a compression spring, a butterfly spring, or the like. The arrangement of the first elastic element 135 can ensure that the vibrating portion 1321 can effectively abut against a vibrating surface, thereby improving the operation stability of the knife clamping device 100 and facilitating the improvement of the reliability of the vibrating broaching machine.

Further, the blade clamping mechanism 120 has a clamping surface 122 facing the mounting hole 111 at a position outside the mounting hole 111. The clamping surface 122 extends in the circumferential direction of the mounting hole 111. The vibration mass 133 is located at a side of the vibration plate 132 facing the mounting hole 111. The first elastic member 135 is a belleville spring. The first elastic member 135 is clamped between the clamping surface 122 and a side surface of the toolholder base 110 where the mounting hole 111 is formed.

When the vibrating broaching machine is located on the horizontal plane, the vibrating block 133 is located below the vibrating disk 132, and the clamping surface 122 is the surface facing the blade clamping mechanism 120. The first elastic member 135 is clamped between the clamping surface 122 and the surface of the holder 110 on the side of the mounting hole 111, so as to mount the first elastic member 135. The first elastic member 135 is a belleville spring, so that the magnitude of the elastic force of the first elastic member 135 can be conveniently adjusted, and in practical application, the adjustment of the elastic force of the first elastic member 135 can be realized by adjusting the number of the belleville springs, so that the use convenience of the vibration broaching machine is improved.

Further, in some embodiments, the vibration mechanism 130 further includes a second elastic member 136. The second elastic member 136 is used to provide an elastic restoring force for urging the blade clamping mechanism 120 to move in a direction opposite to the elastic force of the first elastic member 135. The elastic force provided by the first elastic member 135 is greater than the elastic restoring force provided by the second elastic member 136. The second elastic member 136 and the first elastic member 135 may be the same or different.

Therefore, the direction of the elastic restoring force exerted by the second elastic member 136 on the knife clamping mechanism 120 is opposite to the direction of the elastic force exerted by the first elastic member 135 on the knife clamping mechanism 120, and the elastic restoring force provided by the second elastic member 136 is set to be smaller than the elastic force provided by the first elastic member 135, so as to ensure that the vibration part 1321 can be effectively abutted against the vibration surface. The first elastic member 135 and the second elastic member 136 are engaged with each other, so as to play a role of resetting when the knife clamping mechanism 120 drives the broach 200 to vibrate, so as to ensure that the knife clamping mechanism 120 can continuously vibrate powerfully.

Further, in some embodiments, the second elastic member 136 is a belleville spring. The toolholder base 110 includes a base 112 and a support 113 disposed on the base 112. The bracket 113 is provided with a mounting hole 111 penetrating the bracket 113. Thus, the mounting hole 111 is a through hole. The clamping device 100 further includes a retaining member 140. One end of the blade clamping mechanism 120 passes through the mounting hole 111 and is coupled to the locking member 140. The second elastic element 136 is sleeved on an end of the knife clamping mechanism 120 located on the support 113 and facing the base 112. The locking member 140 is supported by the bracket 113 through the second elastic member 136. Thus, the second elastic member 136 is clamped between the locker 140 and the bracket 113 to achieve the installation of the second elastic member 136. The locking member 140 is used to axially lock the insert clamping mechanism 120 to ensure the connection stability and the connection reliability between the insert clamping mechanism 120 and the holder base 110.

The second elastic member 136 is a belleville spring, so that the elastic force of the second elastic member 136 can be conveniently adjusted, and the convenience of the vibration broaching machine can be improved. In practical use, the adjustment of the elastic restoring force of the second elastic member 136 can be achieved by adjusting the number of the belleville springs.

Referring to fig. 3, in some embodiments, there are a plurality of vibration mechanisms 130. The plurality of vibration mechanisms 130 are disposed at intervals along the circumferential direction of the mounting hole 111, and are configured to provide a vibration force that synchronously drives the knife clamping mechanism 120 to vibrate along the central axis direction of the mounting hole 111. Here, the number of the vibration mechanisms 130 may be two or more. Specifically, in the present embodiment, the number of the vibration mechanisms 130 is two. The provision of a plurality of vibration mechanisms 130 increases the vibration force to which the blade clamping mechanism 120 is subjected.

In some embodiments, the knife clamping device 100 further comprises an axial stop (not shown). The axial stopper is mounted on the holder base 110 and is used to limit the circumferential position of the vibration block 133 along the mounting hole 111. The axial limiting member is arranged to prevent the vibrating block 133 from rotating under the driving of the vibrating disk 132, so as to effectively ensure the operation stability of the cutter clamping mechanism 120 and the broaching tool 200, and further improve the precision reliability of broaching.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A knife clamping device is characterized by comprising a knife clamping seat, a knife clamping mechanism and a vibration mechanism;

one end of the knife holder seat is provided with a mounting hole;

one end of the cutter clamping mechanism is slidably arranged in the mounting hole in a penetrating way; the cutter clamping mechanism is provided with a clamping part with adjustable size; the clamping part is used for clamping a broach, and the broaching direction of the broach is consistent with the central axis direction of the mounting hole;

the vibration mechanism is connected with the cutter clamping mechanism and is controlled to provide vibration force for driving the cutter clamping mechanism to vibrate in a reciprocating mode along the central axis direction of the mounting hole.

2. The knife clamping device of claim 1, wherein the vibration mechanism comprises a vibration driving member, a vibration disc and a vibration block fixedly connected with the knife clamping mechanism;

the vibration disc is rotatably arranged on the knife holder seat and protrudes out of one end of the knife holder seat, which is provided with the mounting hole; a vibration part is arranged on the surface of one side of the vibration disc, which deviates from or faces the mounting hole, along the circumferential direction; one side of the vibration part, which is far away from the vibration disk, is provided with a vibration surface which undulates along the circumferential direction of the vibration disk;

the vibrating block is at least partially stacked with the vibrating disk; a matching part which is in slidable contact with the vibration surface is arranged on the surface of one side, facing the vibration disk, of the vibration block;

the vibration driving piece is used for driving the vibration disc to rotate so as to drive the matching part to vibrate in a reciprocating mode in the direction of the central axis of the mounting hole.

3. The knife clamping device of claim 2, wherein the vibrating portion is a plurality of vibrating teeth spaced circumferentially along the vibrating disk; the plurality of vibration teeth are radially arranged around the central axis of the vibration disc; the matching part is a convex column arranged on one side of the vibration block facing the vibration disc; in the circumferential direction of the vibration disk, the size of one end, away from the vibration block, of the convex column is smaller than the width of a tooth groove between every two adjacent vibration teeth; or

The vibration part is a vibration ring arranged along the circumferential direction of the vibration disk; one side of the vibration ring, which is far away from the vibration disk, is provided with the vibration surface; the matching part is a convex column which can be slidably abutted against the vibration surface; or

The vibration part is an annular groove formed on the surface of one side, facing the vibration block, of the vibration disc along the circumferential direction of the vibration disc; the bottom surface of the annular groove is used as the vibration surface and is a zigzag surface which is fluctuated along the circumferential direction of the vibration disk; the matching part is a convex column which extends into the annular groove and is slidably abutted against the vibration surface.

4. The clamping knife device of claim 2, wherein the vibration mechanism further comprises a first resilient member; the first elastic piece is used for providing an elastic force for driving the vibration block to move along the direction towards the vibration disk so as to enable the matching part to be slidably abutted against the vibration surface.

5. The knife clamping device of claim 4, wherein the portion of the knife clamping mechanism outside the mounting hole has a clamping surface facing the mounting hole; the clamping surface extends along the circumferential direction of the mounting hole; the vibrating block is positioned on one side of the vibrating disk facing the mounting hole; the first elastic piece is a belleville spring; the first elastic piece is clamped between the clamping surface and one side surface of the tool holder seat, which is provided with the mounting hole.

6. The clamping device as claimed in claim 4, wherein said vibration mechanism further comprises a second resilient member; the second elastic piece is used for providing an elastic restoring force for driving the cutter clamping mechanism to move along the direction opposite to the elastic force direction of the first elastic piece; the elastic force provided by the first elastic member is greater than the elastic restoring force provided by the second elastic member.

7. The clamping knife device of claim 6, wherein the second resilient member is a belleville spring; the knife holder comprises a base and a bracket arranged on the base; the bracket is provided with the mounting hole penetrating through the bracket;

the knife clamping device also comprises a locking piece; one end of the knife clamping mechanism penetrates through the mounting hole and is connected with the locking piece; the second elastic piece is sleeved on one end, facing the base, of the support, of the cutter clamping mechanism; the locking piece is abutted against the bracket through the second elastic piece.

8. The clamping knife device of claim 2, wherein the vibrating mechanism is plural; the vibration mechanisms are arranged at intervals along the circumferential direction of the mounting hole and are used for providing vibration force for synchronously driving the cutter clamping mechanism to vibrate along the central axis direction of the mounting hole; and/or

The cutter clamping device also comprises an axial limiting piece; the axial limiting piece is installed on the tool holder seat and used for limiting the circumferential position of the vibrating block along the installation hole.

9. The clamping knife device according to claim 1, wherein the vibration mechanism is an ultrasonic vibration mechanism; the ultrasonic vibration mechanism comprises an ultrasonic generator and an ultrasonic transducer connected with the cutter clamping mechanism; the ultrasonic generator is connected with the ultrasonic transducer and used for driving the ultrasonic transducer to work so as to drive the cutter clamping mechanism to vibrate in a reciprocating mode along the direction of the central axis of the mounting hole.

10. A vibration broaching machine comprising a machine body, a clamping device according to any one of claims 1 to 9, and a broaching tool; the knife holder seat is arranged on the lathe bed; the broach is clamped in the clamping part.

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