CN214109038U - Cutter clamping device and broaching machine - Google Patents

Abstract

The utility model relates to a press from both sides cutter body device and broaching machine. The cutter body clamping device comprises a cutter holder, a cutter body and a driving mechanism. The cutter clamping body comprises a rotary sliding sleeve with openings at two ends, a cutter clamping main body and a plurality of clamping jaws. One end of the cutter clamping main body can rotatably penetrate through the rotary sliding sleeve, and the other end of the cutter clamping main body extends out of the rotary sliding sleeve and is connected with the cutter clamp seat. The end face of one end of the cutter clamping main body, which is positioned in the rotary sliding sleeve, forms a plurality of guide grooves which are radially arranged. The inner wall of the rotary sliding sleeve and the corresponding position of each guide groove form an arc-shaped groove. One end of each clamping jaw departing from the arc-shaped groove is surrounded to form a clamping part for clamping the cutter. The driving mechanism is used for providing a driving force for driving the rotating sliding sleeve to rotate forwards or reversely so as to drive the clamping jaws to fold inwards or unfold outwards. Therefore, the cutter clamping body device can realize rotary clamping of the broach so as to improve the clamping effect of the broach and the reliability of the cutter clamping body device, thereby being beneficial to improving the processing precision of the broaching machine.

Description

Cutter clamping device and broaching machine

Technical Field

The utility model relates to a broaching machine makes technical field, especially relates to a double-layered cutter body device and broaching machine.

Background

In metal working, broaching can achieve high dimensional accuracy and small surface roughness. A broaching machine for broaching is a machine tool for machining a through hole, a plane and a formed surface of a workpiece by using a broaching tool as a tool.

In the existing broaching machine, the broaching tool is usually directly fixed on a slide carriage or a machine body. However, due to the installation mode of the broach, the broach is easy to loosen after being used for a long time, the installation reliability of the broach is low, and the processing precision of the broaching machine is affected.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a tool clamping body device and a broaching machine capable of improving the machining accuracy of the broaching machine, in order to solve the problem that the conventional broach mounting method affects the machining accuracy of the broaching machine.

A cutter clamping device comprises a cutter clamping seat, a cutter clamping body and a driving mechanism;

the cutter clamping body comprises a rotary sliding sleeve with openings at two ends, a cutter clamping main body and a plurality of clamping jaws; one end of the cutter clamping main body can rotatably penetrate through the rotating sliding sleeve, and the other end of the cutter clamping main body extends out of the rotating sliding sleeve and is connected with the cutter holder seat; a plurality of guide grooves which are radially arranged are formed on the end face of one end of the cutter clamping main body, which is positioned in the rotary sliding sleeve; the inward ends of the guide grooves are communicated with each other;

an arc-shaped groove communicated with the corresponding guide groove is formed at the position, corresponding to each guide groove, of the inner wall of the rotary sliding sleeve;

the clamping jaws are respectively in one-to-one correspondence with the guide grooves; each clamping jaw is slidably arranged in the corresponding guide groove; one end of each clamping jaw abuts against the inner wall of the corresponding arc-shaped groove; one end of each clamping jaw, which deviates from the arc-shaped groove, is surrounded to form a clamping part for clamping a cutter;

the driving mechanism is used for providing a driving force for driving the rotary sliding sleeve to rotate forwards or reversely so as to drive the plurality of clamping jaws to fold inwards or unfold outwards, so that the size of the clamping part is adjusted.

In some of the embodiments, the end of each clamping jaw, which faces away from one end of the arc-shaped groove, is formed with an arc-shaped groove; the arc groove extends along the axial direction of the rotary sliding sleeve.

In some of these embodiments, the toolholder seat comprises a base and a support disposed on the base; the bracket is provided with a mounting through hole;

the knife clamping body device also comprises a locking piece; one end of the cutter clamping main body penetrates through the mounting through hole and is connected with the locking piece; the locking piece is abutted against the bracket so as to lock the knife clamping main body in the axial direction.

In some embodiments, the cutter clamping body further comprises a top cap, and the top cap is mounted on the cutter clamping body main body and covers an opening at one end of the rotary sliding sleeve; the top cap is provided with a position avoiding through hole for the cutter to pass through; the avoiding through hole and the clamping part are coaxially arranged; and/or

The cutter clamping body further comprises an elastic piece corresponding to each clamping jaw; the elastic piece is used for providing an elastic force for driving the clamping jaws to slide outwards.

In some embodiments, the device further comprises a connecting rod which is rotatably connected with the outer wall of the rotary sliding sleeve; the driving mechanism is a double-shaft hydraulic oil cylinder; two piston rods of the double-shaft hydraulic oil cylinder are respectively connected with two ends of the connecting rod and are used for driving the connecting rod to reciprocate along the direction vertical to the axial direction of the rotary sliding sleeve so as to drive the rotary sliding sleeve to rotate in the forward direction or the reverse direction.

In some embodiments, the device further comprises a rotary shifting fork arranged on the outer wall of the rotary sliding sleeve and a rotary shaft arranged on the connecting rod; the rotating shaft is rotatably connected with the rotating shifting fork.

In some embodiments, the outer wall of the rotary sliding sleeve is provided with a plurality of mounting positions at intervals along the circumferential direction; the connecting rod is detachably and rotatably connected with any one of the mounting positions.

In some embodiments, the clamping knife body is provided in plurality, and the plurality of clamping knife bodies are arranged at intervals along the longitudinal direction of the connecting rod; each rotary sliding sleeve is rotatably connected with the connecting rod.

In some embodiments, the device further comprises a left limiting block, a right limiting block, a left travel limiting piece and a right travel limiting piece; the left limiting block and the right limiting block are arranged on the connecting rod at intervals along the longitudinal direction of the connecting rod; the left stroke limiting piece and the right stroke limiting piece are arranged on the cutter clamping seat along the longitudinal direction of the connecting rod; the connecting rod can move to the left limiting block and the left travel limiting piece in the longitudinal direction to abut against or the right limiting block and the right travel limiting piece to abut against.

In some of these embodiments, the left travel limiter and the right travel limiter are both travel switches.

A broaching machine comprises a machine body, the cutter body 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 cutter body clamping device and the broaching machine, the cutter holder seat is arranged on the machine body, and the broaching machine can be formed together with the broaching tool. In the clamping process of the broach, the broach only needs to be placed in the clamping part, then the driving mechanism is started, the rotary sliding sleeve is driven by the driving mechanism to rotate, the distance between the inner wall of the arc-shaped groove aligned with the guide groove and the central axis of the rotary sliding sleeve is gradually reduced, and the clamping jaws abutted to the inner wall of the arc-shaped groove are pushed to slide inwards to enable the clamping jaws to shrink inwards so as to clamp the broach in the clamping part. Therefore, the cutter body clamping device can realize rotary clamping of the broach to improve the clamping effect of the broach, greatly reduce the probability of looseness and the like of the broach after long-time use, improve the reliability of the cutter body clamping device and be favorable for improving the machining precision of the broaching machine.

Drawings

FIG. 1 is a schematic view of a knife holder assembly according to a preferred embodiment of the present invention;

FIG. 2 is a front view of the knife body clamping device shown in FIG. 1;

FIG. 3 is a schematic view of a blade clamping body of the blade clamping device shown in FIG. 1;

FIG. 4 is a cross-sectional view A-A of the blade holder shown in FIG. 3;

FIG. 5 is a cross-sectional view of the insert body of FIG. 4;

FIG. 6 is a cross-sectional view of the rotary slide sleeve in the body of the holder shown in FIG. 4;

FIG. 7 is a schematic view of the structure of the clamping jaw of the tool body shown in FIG. 4;

fig. 8 is a schematic view illustrating a rotary fork of the holder device shown in fig. 1.

Description of reference numerals: 10. a blade clamping device; 20. broaching; 100. a knife holder seat; 110. a base; 111. mounting holes; 120. a support; 121. a support pillar; 122. a support plate; 200. clamping a cutter body; 210. rotating the sliding sleeve; 211. an arc-shaped slot; 212. a second connection hole; 213. an installation position; 220. a cutter clamping main body; 221. a guide groove; 230. a clamping jaw; 231. a circular arc groove; 240. a clamping portion; 250. a top cap; 251. avoiding a through hole; 260. an elastic member; 300. a drive mechanism; 400. a first connecting member; 500. a locking member; 600. a connecting rod; 710. rotating the shifting fork; 711. rotating the groove; 712. a first connection hole; 720. a rotating shaft; 730. a connecting rod shifting fork; 800. a second connecting member; 910. a left stop block; 920. a right stopper; 1001. a left travel limit; 1002. a right travel limit.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The 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 invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. 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.

Furthermore, the drawings are not 1: 1, and the relative dimensions of the various elements in the figures are drawn for illustration only and not necessarily to true scale.

Referring to fig. 1 to 3, the present invention provides a tool clamping device 10 and a broaching machine (not shown). The broaching machine comprises a machine body (not shown), a tool clamping body device 10 and a broaching tool 20. The cutter body clamping device 10 is arranged on the lathe bed. The broaching tool 20 is clamped to the toolholder body means 10. Thus, the tool holder assembly 10 is primarily used to mount the broach 20 on a broaching machine.

Of course, in other embodiments. The tool body clamping device 10 can also be applied to other machine tools, such as milling machines, planing and slotting machines, etc., and can clamp a tool such as a milling cutter or a planing tool on a machine body of the machine tool. In the present application, the knife holder assembly 10 will be described mainly by way of example as applied to a broaching machine.

Referring to fig. 1 and 2, a knife holder device 10 according to a preferred embodiment of the present invention includes a knife holder 100, a knife holder 200 and a driving mechanism 300.

The toolholder 100 is adapted to be coupled to a bed of a broaching machine. Thus, in the broaching machine, the holder 100 is mounted on the bed to mount the holder assembly 10 on the bed.

Specifically, the method comprises the following steps. The toolholder base 100 comprises a base 110 and a support 120 arranged on the base 110, wherein a plurality of mounting holes 111 are formed in the base 110, and the plurality of mounting holes 111 are arranged at intervals along the circumferential direction of the base 110; the knife clamping body device 10 further comprises a plurality of first connecting pieces 400, and the number of the first connecting pieces 400 is smaller than or equal to the number of the mounting holes 111. Each first connector 400 is inserted into a corresponding mounting hole 111 and is used to mount the toolholder 100 on the bed of the machine tool. In the broaching machine, the tool holder 100 can be mounted on the machine body only by connecting the first connecting member 400 inserted into the mounting hole 111 to the machine body.

Referring to fig. 4 and 5, the cutter clamping body 200 includes a rotary sliding sleeve 210 with two open ends, a cutter clamping body 220 and a plurality of clamping jaws 230. One end of the main body 220 is rotatably inserted into the rotary sliding sleeve 210, and the other end extends out of the rotary sliding sleeve 210 and is connected to the holder 100. Specifically, the holder main body 220 is connected to the holder 120. The end surface of the clamping knife main body 220 at one end of the rotary sliding sleeve 210 is formed with a plurality of guide grooves 221 arranged radially. Inward ends of the plurality of guide grooves 221 communicate with each other.

It is understood that a plurality refers to a number greater than or equal to 2. Therefore, the number of the guide grooves 221 is greater than or equal to 2.

Referring again to fig. 2 and 3, in some embodiments, the blade-clamping device 10 further includes a locking member 500. The bracket 120 is provided with a mounting through hole (not shown). One end of the clamping blade body 220 passes through the mounting through-hole and is coupled with the locker 500. The locker 500 abuts against the surface of the holder 120 to lock the clamping main body 220 in the axial direction. Therefore, the locking member 500 can prevent the clamping knife main body 220 from sliding in the axial direction, greatly reduce the probability of loosening the clamping knife main body 220 and improve the structural stability of the clamping knife body device 10.

Specifically, the support 120 includes two support posts 121 disposed on the base 110 at intervals and a support plate 122 connected between the two support posts 121. The support plate 122 is provided with a mounting through hole. The surface of the main body 220 is provided with a shoulder protruding along the circumferential direction, and the shoulder and the locking member 500 are respectively located at two ends of the mounting hole and respectively abut against the upper surface and the lower surface of the supporting plate 122, so as to axially lock the main body 220 in the mounting hole. Thus, the locking member 500, the shoulder of the holder main body 220, and the support plate 122 are engaged with each other, and the holder main body 220 is locked in the axial direction.

Specifically, an outer wall of one end of the cutter clamping body 220 is formed with an external thread. The locking member 500 is a locking nut that is sleeved on the cutter clamping body 220 and is threadedly engaged with the external thread. The lock nut is a standard component, and the axial direction of the cutter clamping body 220 is locked by using the standard component, so that the installation or the disassembly operation by using common tools is convenient, meanwhile, the replacement is convenient when the components are damaged, and the processing cost of the cutter clamping body device 10 is reduced. More specifically, the number of the lock nuts is two, so as to lock the double nuts to the main body 220 of the double-nut cutter, and the two lock nuts may have the same or different sizes.

In addition, the locking member 500 may have a structure capable of performing a mortise and tenon connection with the holder main body 220. Retaining member 500's material is 304 stainless steel, has characteristics that workable, high temperature resistant and toughness are high for retaining member 500 is difficult to warp, can guarantee that retaining member 500 fixation clamp sword main part 220 is comparatively firm.

Referring to fig. 6, an arc-shaped groove 211 is formed on the inner wall of the rotary sliding sleeve 210 at a position corresponding to each guide groove 221. The distance from the inner wall of the arc-shaped groove 211 to the central axis of the rotating sliding sleeve 210 is greater than the inner radius of the rotating sliding sleeve 210. The arc-shaped slot 211 extends along the lengthwise direction of the rotary sliding sleeve 210.

Referring to fig. 4 and 6 again, the plurality of clamping jaws 230 correspond to the plurality of guiding grooves 221 one by one, respectively. Each jaw 230 is slidably disposed within a corresponding guide groove 221. One end of each clamping jaw 230 can be abutted against the inner wall of the corresponding arc-shaped groove 211; the end of the plurality of clamping jaws 230 facing away from the arcuate slot 211 is surrounded by a clamping portion 240 for clamping the tool. In the broaching machine, the grip portion 240 is used to clamp the broaching tool 20. Since the plurality of guide grooves 221 are radially arranged, the plurality of jaws 230 are also radially arranged in the rotary sleeve 210.

Referring also to fig. 7, in particular, the end of each clamping jaw 230 facing away from the end of the arc-shaped slot 211 is formed with an arc-shaped groove 231. The circular arc groove 231 extends in the axial direction of the rotary sliding sleeve 210. In the broaching machine, most broaches 20 are generally cylindrical, so when the broaches 20 are clamped in the clamping portion 240, the inner walls of the circular arc grooves 231 abut against the outer walls of the broaches 20 to increase the contact area between the clamping jaws 230 and the broaches 20, so that the broaches 20 are clamped better by the tool holder assembly 10. Further, the arc-shaped recesses 231 are formed in the clamping jaw 230, so that the clamping portion 240 can clamp a plurality of types of broaches 20 having similar specifications, thereby ensuring the clamping effect of the tool body clamping device 10 on the broaches 20 and achieving high applicability.

Referring to fig. 1, fig. 2 and fig. 4 again, the driving mechanism 300 is used for providing a driving force for driving the rotating sleeve 210 to rotate in a forward direction or a reverse direction so as to drive the plurality of clamping jaws 230 to close inward or open outward, so as to adjust the size of the clamping portion 240. Specifically, the driving mechanism 300 is mounted on the holder 100 and provides a driving force for rotating the sliding sleeve 210. The driving mechanism 300 may be a motor, a hydraulic cylinder, an electric cylinder, or the like. Specifically, when the holder 100 includes the base 110 and the holder 120, the driving mechanism 300 and the holder main body 220 are mounted on the holder 120.

When the driving mechanism 300 drives the rotating sliding sleeve 210 to rotate forward, the distance from the inner wall of the arc-shaped groove 211 aligned with the guide groove 221 to the central axis of the rotating sliding sleeve 210 is gradually reduced, so that the clamping jaws 230 slide inward under the pushing of the inner wall of the arc-shaped groove 211 until the plurality of clamping jaws 230 are folded inward to clamp the tool in the clamping portion 240; when the driving mechanism 300 drives the rotating sliding sleeve 210 to rotate reversely, the distance from the inner wall of the arc-shaped groove 211 corresponding to the guiding groove 221 to the central axis of the rotating sliding sleeve 210 is gradually increased, and at the moment, the plurality of clamping jaws 230 are opened outwards until the outer end of each clamping jaw 230 abuts against the inner wall of the arc-shaped groove 211, so that the cutter in the clamping part 240 is loosened.

Therefore, the cutter body clamping device 10 can clamp the broach 20 on the broaching machine to realize rotary clamping, so that the clamping effect on the broach 20 is better, the probability of loosening and the like of the broach 20 after long-term use is greatly reduced, the reliability of the cutter body clamping device 10 is improved, and the improvement of the machining precision of the broaching machine is facilitated.

Referring again to fig. 3, in some embodiments, the clipper body 200 further includes a top cap 250. The top cap 250 is installed on the main body of the cutter holder body 200 and covers the opening of the rotary sliding sleeve 210. The top cap 250 is rotatable with the main body 220 and shields the components inside the rotating sleeve 210. The top cap 250 is provided with a clearance through hole 251 for passing a cutter. The avoiding through hole 251 is coaxially disposed with the clamping portion 240. The avoiding through hole 251 is mainly used for avoiding the broach 20. Therefore, the top cap 250 plays a role in protection, so as to prevent external impurities from entering the rotary sliding sleeve 210 to affect the operation of the cutter clamping body 200, thereby ensuring that the operation of the cutter clamping body device 10 is more sensitive and improving the reliability of the cutter clamping body device 10.

In some embodiments, the blade body 200 further includes a resilient member 260 corresponding to each jaw 230. The elastic member 260 is used to provide an elastic force for driving the clamping jaws 230 to slide outward. The elastic member 260 may be a compression spring, a metal dome, a rubber pad, etc. In the present embodiment, the elastic member 260 is a compression spring. When the broach 20 needs to be detached, the driving mechanism 300 is only required to drive the rotary sliding sleeve 210 to rotate reversely, so that the distance from the inner wall of the arc-shaped groove 211 to the central axis of the rotary sliding sleeve 210 is gradually increased, meanwhile, the clamping jaws 230 are outwards sprung to abut against the inner wall of the arc-shaped groove 211 under the action of the elastic force provided by the elastic member 260, and at the moment, the clamping jaws 230 are outwards opened to enlarge the clamping portion 240, so that the broach 20 can be loosened to facilitate the subsequent taking-out of the broach 20 from the clamping portion 240. Therefore, the elastic member 260 is provided to automatically open the plurality of clamping jaws 230, so as to facilitate the tool body clamping device 10 to release the broach 20.

Referring again to fig. 1 and 2, in some embodiments, the blade clamping device 10 further includes a connecting rod 600 rotatably connected to the outer wall of the rotating sliding sleeve 210. The drive mechanism 300 is a dual axis hydraulic ram. Two piston rods of the double-shaft hydraulic oil cylinder are respectively connected with two ends of the connecting rod 600 and are used for driving the connecting rod 600 to reciprocate along a direction perpendicular to the circumferential direction of the rotary sliding sleeve 210 so as to drive the rotary sliding sleeve 210 to rotate in the forward direction or the reverse direction. Specifically, the connecting rod 600 is a straight rod arranged in parallel with the biaxial hydraulic cylinder. Therefore, the driving mechanism 300 is provided as a double-shaft hydraulic oil cylinder, so that the driving mechanism 300 can realize constant-speed reciprocating motion to provide driving force for forward rotation and reverse rotation to the rotary sliding sleeve 210 through the connecting rod 600, and the rotation of the rotary sliding sleeve 210 is realized through hydraulic control to ensure higher reliability during the operation of the knife clamping body 200.

Further, in some embodiments, the knife holder assembly 10 further comprises a rotary fork 710 mounted on the outer wall of the rotary sliding sleeve 210 and a rotary shaft 720 mounted on the connecting rod 600. The rotary shaft 720 is rotatably connected to the rotary fork 710. Specifically, the rotary fork 710 is provided with a rotary groove 711, the rotary shaft 720 is rotatably accommodated in the rotary groove 711, and the rotary shaft 720 is in clearance fit with the rotary groove 711. More specifically, the rotating shaft 720 is a pin shaft to set the rotating shaft 720 as a standard. In the actual use process, the driving mechanism 300 drives the connecting rod 600 to drive the rotating shaft 720 to move along the direction perpendicular to the axial direction of the rotating sliding sleeve 210, and at this time, the rotating shaft 720 can shift the rotating shifting fork 710 to drive the rotating sliding sleeve 210 to rotate in the forward direction or in the reverse direction.

Referring to fig. 8, in particular, the rotary fork 710 has an L-shaped structure. One end of the rotary fork 710 is detachably mounted on the outer wall of the rotary sleeve 210, and the other end is rotatably connected with the rotary shaft 720. More specifically, one end of the rotary fork 710 is provided with a first connecting hole 712, the outer wall of the rotary sliding sleeve 210 is provided with a second connecting hole 212, and the knife holder device 10 further includes a second connecting member 800, wherein the second connecting member 800 penetrates through the first connecting hole 712 and is connected to the second connecting hole 212, so as to install the rotary fork 710 on the rotary sliding sleeve 210. The connecting rod 600 is a threaded fastener, and the second connecting hole 212 is a threaded hole.

Referring to fig. 1 and 2 again, in particular, the two-axis hydraulic cylinder is disposed parallel to and spaced apart from the connecting rod 600. Two piston rods of the double-shaft hydraulic oil cylinder are respectively connected with two ends of a connecting rod 600 through a connecting rod shifting fork 730. Thus, the link fork 730 is mainly used to transmit the driving force on the piston rod of the biaxial hydraulic cylinder to the link 600. Moreover, the connecting rod 600 is parallel to the double-shaft hydraulic oil cylinder and arranged at intervals, so that the longitudinal direction of the connecting rod 600 is perpendicular to the axial direction of the rotary sliding sleeve 210, and the accuracy of power transmission is guaranteed.

Referring to fig. 3 again, in some embodiments, the outer wall of the rotating sleeve 210 is provided with a plurality of mounting locations 213 along the circumferential direction. The connecting rod 600 is detachably rotatably connected to any one of the mounting locations 213. When the rotary fork 710 is an L-shaped structure, each mounting position 213 is provided with a second connecting hole 212. After long-time use, the situation that the second connecting hole 212 cannot be used due to damage is likely to occur under the action of the second connecting member 800, and at this time, only the second connecting member 800 is needed to install the rotary shifting fork 710 on the second connecting hole 212 of another installation position 213, and the rotary sliding sleeve 210 and even the cutter holder 200 do not need to be replaced, thereby greatly prolonging the service life of the cutter holder device 10.

Referring to fig. 1 and 2 again, in some embodiments, the cutter body 200 is multiple. The plurality of cutter bodies 200 are spaced apart from each other in the longitudinal direction of the connecting rod 600. Each rotary sliding sleeve 210 is rotatably connected with the connecting rod 600. Each cutter clamping body 200 can clamp one broach 20, and the arrangement of a plurality of cutter clamping bodies 200 can ensure that a plurality of broaches 20 can be simultaneously installed on one broaching machine. Moreover, the driving mechanism 300 can drive the connecting rod 600 to move along the direction perpendicular to the axial direction of the rotating sliding sleeve 210, so as to drive the rotating sliding sleeves 210 to rotate automatically, thereby realizing the simultaneous clamping and simultaneous loosening of the broaching tools 20 by the tool clamping bodies 200, facilitating the installation and the disassembly of the broaching tools 20 on the broaching machine, and being beneficial to the improvement of the processing precision of the multi-tool broaching machine.

The plurality of cutter holders 200 may be cutter holders 200 having the same size or cutter holders 200 having different sizes. The sizes of the broaches 20 which can be clamped by the cutter clamping bodies 200 of different sizes are also different, so that when the cutter clamping bodies 200 are cutter clamping bodies 200 of the same size, the sizes of the broaches 20 on the broaching machine are also the same; when the plurality of cutter bodies 200 have different specifications, the sizes of the broaches 20 in the broaching machine are different.

In some embodiments, the knife holder device 10 further includes a left limiting block 910, a right limiting block 920, a left stroke limiting member 1001, and a right stroke limiting member 1002. The left and right stoppers 910 and 920 are disposed on the connecting rod 600 at intervals along the longitudinal direction of the connecting rod 600. The left stroke limiter 1001 and the right stroke limiter 1002 are disposed on the toolholder 100 along a longitudinal direction of the connecting rod 600. The connecting rod 600 can move along the longitudinal direction until the left limiting block 910 abuts against the left stroke limiting member 1001 or the right limiting block 920 abuts against the right stroke limiting member 1002.

When the driving mechanism 300 drives the connecting rod 600 to drive the rotating sliding sleeve 210 to rotate forward, until the plurality of clamping jaws 230 are retracted inward to clamp the broach 20, the connecting rod 600 drives the left limiting block 910 and the right limiting block 920 to move from left to right until the right limiting block 920 abuts against the right stroke limiting block 1002, and at this time, the right stroke limiting block 1002 stops the driving mechanism 300, so that the connecting rod 600 stops driving the rotating sliding sleeve 210 to rotate forward. When the driving mechanism 300 drives the connecting rod 600 to drive the rotating sliding sleeve 210 to rotate reversely until the plurality of clamping jaws 230 are opened outwards to loosen the broach 20, the connecting rod 600 drives the left limiting block 910 and the right limiting block 920 to move from right to left until the left limiting block 910 abuts against the left stroke limiting member 1001, and at this time, the left stroke limiting member 1001 stops the driving mechanism 300, so that the connecting rod 600 also stops driving the rotating sliding sleeve 210 to rotate reversely. Therefore, the left stroke limiting piece 1001 is matched with the left limiting piece 910, and the right stroke limiting piece 1002 is matched with the right limiting piece 920, so that the safe and accurate operation of the cutter clamping body device 10 can be ensured, and the safety of the broaching machine is effectively improved.

Specifically, in this embodiment, the left stroke limiter 1001 and the right stroke limiter 1002 are both stroke switches. Because travel switch compares in travel locating part such as traditional proximity switch, protection level is higher, so with left travel locating part 1001 and right travel locating part 1002 both travel switch, reduced the broaching machine in the broaching machining process cutting fluid and iron fillings get into left travel locating part 1001 and right travel locating part 1002 to cause the probability of malfunction, improved the reliability that the broaching machine used.

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 represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (11)

1. A cutter clamping device is characterized by comprising a cutter clamping seat, a cutter clamping body and a driving mechanism;

the cutter clamping body comprises a rotary sliding sleeve with openings at two ends, a cutter clamping main body and a plurality of clamping jaws; one end of the cutter clamping main body can rotatably penetrate through the rotating sliding sleeve, and the other end of the cutter clamping main body extends out of the rotating sliding sleeve and is connected with the cutter holder seat; a plurality of guide grooves which are radially arranged are formed on the end face of one end of the cutter clamping main body, which is positioned in the rotary sliding sleeve; the inward ends of the guide grooves are communicated with each other;

an arc-shaped groove communicated with the corresponding guide groove is formed at the position, corresponding to each guide groove, of the inner wall of the rotary sliding sleeve;

the clamping jaws are respectively in one-to-one correspondence with the guide grooves; each clamping jaw is slidably arranged in the corresponding guide groove; one end of each clamping jaw abuts against the inner wall of the corresponding arc-shaped groove; one end of each clamping jaw, which deviates from the arc-shaped groove, is surrounded to form a clamping part for clamping a cutter;

the driving mechanism is used for providing a driving force for driving the rotary sliding sleeve to rotate forwards or reversely so as to drive the plurality of clamping jaws to fold inwards or unfold outwards, so that the size of the clamping part is adjusted.

2. The toolholder body arrangement according to claim 1, wherein an end of each of the jaws facing away from the end of the arcuate slot is formed with an arcuate recess; the arc groove extends along the axial direction of the rotary sliding sleeve.

3. The toolholder body arrangement according to claim 1, wherein the toolholder seat includes a base and a support disposed on the base; the bracket is provided with a mounting through hole;

the knife clamping body device also comprises a locking piece; one end of the cutter clamping main body penetrates through the mounting through hole and is connected with the locking piece; the locking piece is abutted against the bracket so as to lock the knife clamping main body in the axial direction.

4. The blade clamping body assembly of claim 1, wherein said blade clamping body further comprises a top cap, said top cap being mounted on said blade clamping body and covering an opening at one end of said rotating sliding sleeve; the top cap is provided with a position avoiding through hole for the cutter to pass through; the avoiding through hole and the clamping part are coaxially arranged; and/or

The cutter clamping body further comprises an elastic piece corresponding to each clamping jaw; the elastic piece is used for providing an elastic force for driving the clamping jaws to slide outwards.

5. The blade clamping device of claim 1, further comprising a connecting rod rotatably connected to an outer wall of said rotary sliding sleeve; the driving mechanism is a double-shaft hydraulic oil cylinder; two piston rods of the double-shaft hydraulic oil cylinder are respectively connected with two ends of the connecting rod and are used for driving the connecting rod to reciprocate along the direction vertical to the axial direction of the rotary sliding sleeve so as to drive the rotary sliding sleeve to rotate in the forward direction or the reverse direction.

6. The knife holder device of claim 5, further comprising a rotary fork mounted on an outer wall of the rotary sliding sleeve and a rotary shaft mounted on the connecting rod; the rotating shaft is rotatably connected with the rotating shifting fork.

7. The blade clamping device as claimed in claim 5, wherein the outer wall of the rotary sliding sleeve is provided with a plurality of mounting positions at intervals along the circumferential direction; the connecting rod is detachably and rotatably connected with any one of the mounting positions.

8. The blade clamping device as claimed in claim 5, wherein the plurality of blade clamping bodies are arranged at intervals along the longitudinal direction of the connecting rod; each rotary sliding sleeve is rotatably connected with the connecting rod.

9. The cutter clamping body device according to claim 5, further comprising a left stopper, a right stopper, a left stroke stopper and a right stroke stopper; the left limiting block and the right limiting block are arranged on the connecting rod at intervals along the longitudinal direction of the connecting rod; the left stroke limiting piece and the right stroke limiting piece are arranged on the cutter clamping seat along the longitudinal direction of the connecting rod; the connecting rod can move to the left limiting block and the left travel limiting piece in the longitudinal direction to abut against or the right limiting block and the right travel limiting piece to abut against.

10. The knife holder device of claim 9, wherein the left travel limit stop and the right travel limit stop are travel switches.

11. A broaching machine comprising a machine body, a tool holder assembly according to any one of claims 1 to 10 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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