CN113681331A

CN113681331A - Back clearance-removable type cutter expanding head

Info

Publication number: CN113681331A
Application number: CN202110930552.2A
Authority: CN
Inventors: 罗华荣; 徐小兵
Original assignee: Zhejiang Jing Yao Numerical Control Technology Co ltd
Current assignee: Zhejiang Jing Yao Numerical Control Technology Co ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2021-11-23

Abstract

The invention belongs to the technical field of machining equipment, and particularly relates to a backlash-removable type cutter expanding head. The invention provides a backlash-removable type cutter expanding head aiming at the problem that the radial feed speed and stroke adjustment of the cutter expanding head in the prior art are inconvenient to control and the machining precision needs to be improved. The transmission mechanism of the invention adopts a rack and gear transmission mode, has stable feeding speed, is convenient to control the feeding speed and adjust the stroke, and improves the processing precision.

Description

Back clearance-removable type cutter expanding head

Technical Field

The invention belongs to the technical field of machining equipment, and particularly relates to a backlash-removable type cutter expanding head.

Background

In the machining process, because the special machine tool is compact in structure, some unit module main shafts only have axial feed but not radial feed, when a large-sized workpiece or the workpiece cannot be turned rotationally, a tool expanding head is required to be used for machining a complex profile, numerical control interpolation motion, turning of inner and outer end surfaces, inner and outer grooves, inner and outer threads, linear boring, multi-step composite boring, chamfering, conicity and the like, and therefore the tool expanding head is widely applied to the special metal cutting machine tool. However, the radial feeding speed and the radial stroke adjustment of the spreader bit in the prior art are not convenient to control, so that the machining precision needs to be improved.

For example, the chinese utility model patent discloses an exhibition tool bit [ application number: 201820994259.6], the utility model comprises a base, a pull rod, a slide seat and a press plate, wherein the base is internally provided with a guide hole, the guide hole is provided with a transverse groove, the pull rod is arranged in the guide hole, the slide seat comprises a slide plate and a slide block, and the slide plate and the slide block are connected into a whole; a wedge mechanism is arranged between the pull rod and the sliding plate; the pressing plate comprises two plate units, a sliding groove which allows the sliding block to move freely and has the moving direction consistent with the extending direction of the transverse groove channel is formed among the two plate units and the base, and the sliding groove is a dovetail groove; an inlaid strip is arranged between the inner side wall on one side of the sliding groove and the side wall on the side corresponding to the sliding block, and a locking mechanism is further arranged between the inlaid strip and the pressing plate.

The utility model discloses a have the advantage that can adjust the clearance between the sliding pair accurately fast, but it still does not solve above-mentioned problem.

Disclosure of Invention

The present invention is directed to solving the above problems and providing a backlash-eliminating type spreader bit which facilitates control of the feeding speed and adjustment of the stroke.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a back clearance can formula of elimination exhibition tool bit, includes exhibition sword main part and the knife rest slider of sliding connection in the exhibition sword main part, in the one end of pull rod extended to exhibition sword main part, and the tip of pull rod took place to be connected with the gliding drive mechanism of pull rod axial lead looks vertically direction with the drive of knife rest slider through being used for driving knife rest slider, drive mechanism includes the gear, the side of gear meshes with the driven rack that sets up on the pull rod with the driven rack that sets up in knife rest slider bottom surface simultaneously.

In the above-mentioned back clearance eliminable formula exhibition tool bit, drive mechanism still includes the drive head of being connected with the pull rod is dismantled, the initiative rack is fixed to be set up in the drive head side, the extending direction of initiative rack is mutually perpendicular with the extending direction of driven rack.

In the back clearance-eliminable type tool holder, an avoiding space is arranged in the tool holder sliding block, an opening is arranged at one side of the avoiding space close to the driving head, and the driving head can enter or exit the avoiding space through the opening by moving the pull rod.

In foretell back clearance can the formula of elimination exhibition tool bit, drive mechanism is still including setting up the lubricated passageway in exhibition sword main part, lubricated passageway one end is linked together with the side of drive head, and the other end intercommunication has dodges the recess, dodge the recess setting and sunken in exhibition sword main part side and to the inside of exhibition sword main part, the end cap can be dismantled and connect in lubricated passageway, and the tip holding of end cap is in dodging the recess.

In the backlash-removable type expanding cutter head, a balancing weight for balancing the change of the gravity center of the cutter rest sliding block in the sliding process is further arranged in the expanding cutter main body.

In the above-mentioned backlash-eliminable type spreader bit, the weight block is connected with the spreader main body in a sliding manner, and the sliding direction of the weight block is opposite to that of the tool rest sliding block.

In the backlash-removable type spreader bit, the counterweight block and the tool rest slide block are respectively positioned at two sides of the gear, and a plurality of meshing teeth are fixedly arranged on the counterweight block and are meshed with the gear.

In foretell back clearance can be eliminated formula exhibition tool bit, still fixedly connected with separation blade in the exhibition sword main part, direction passageway has between separation blade and the exhibition sword main part, the one end of knife rest slider extends to in the direction passageway.

In foretell back clearance can be eliminated formula exhibition tool bit, still fixedly connected with limit stop in the exhibition sword main part, limit stop is equipped with two and symmetry and sets up the both ends at the knife rest slider, and the slip knife rest slider can make the tip pressure of knife rest slider establish on limit stop.

In foretell back clearance can be eliminated formula exhibition tool bit, have and only go up fixedly connected with buffer spring on the dog, the tool rest slider is close to this dog's an end surface and is equipped with the buffering through-hole, the internal diameter of buffering through-hole equals buffer spring's external diameter, buffer spring keeps away from in the one end of dog extend to the buffering through-hole and buffer spring's tip fixed connection on the tool rest slider.

Compared with the prior art, the invention has the advantages that:

1. the transmission mechanism of the invention adopts a rack and gear transmission mode, has stable feeding speed, is convenient to control the feeding speed and adjust the stroke, and improves the processing precision.

2. According to the invention, the balancing weight for balancing the change of the gravity center in the sliding process of the tool rest sliding block is arranged on the other side of the gear, so that the expanding tool can be suitable for high rotating speed.

3. The invention can be suitable for installing and using knife rests of different models by adjusting the weight of the balancing weight, and the universal matching capability is improved.

4. The invention has large stroke and can realize the following steps: 1 transmission, the gear positioning shaft is eccentric, and the clearance in two directions can be adjusted to achieve the purpose of eliminating the back clearance.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a cross-sectional view of a portion of the structure of the present invention;

FIG. 4 is an enlarged view at A in FIG. 2;

in the figure: the cutter unfolding device comprises a cutter unfolding main body 1, a cutter rest sliding block 2, a pull rod 3, a transmission mechanism 4, a balancing weight 5, a blocking piece 6, a guide channel 7, a limit stop 8, a buffer spring 9, a buffer through hole 10, an avoiding space 21, an opening 22, a gear 41, a driving rack 42, a driven rack 43, a driving head 44, a lubricating channel 45, an avoiding groove 46, a plug 47 and a meshing tooth 51.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1-3, a formula of back clearance can be eliminated exhibition tool bit, including exhibition sword main part 1 and tool rest slider 2 of sliding connection on exhibition sword main part 1, the one end of pull rod 3 extends to in the exhibition sword main part 1, and the tip of pull rod 3 takes place to be connected with the drive of tool rest slider 2 through being used for driving tool rest slider 2 and the gliding drive mechanism 4 of the direction mutually perpendicular with pull rod 3 axial lead, drive mechanism 4 includes gear 41, gear 41's side meshes with the driving rack 42 that sets up on pull rod 3 and the driven rack 43 that sets up in tool rest slider 2 bottom surface simultaneously.

When the tool rest slide block is used, the pull rod 3 is pulled, the pull rod 3 drives the driving rack 42 to move along the axial lead direction of the pull rod 3, the driving rack 42 drives the gear 41 to rotate, and therefore the driven rack 43 is driven, and the tool rest slide block 2 provided with a machining tool slides in the direction perpendicular to the axial lead of the pull rod 3. Therefore, the transmission mechanism of the invention adopts the transmission mode of the

racks

42 and 43 and the gear 41, has stable feeding speed, is convenient to control the feeding speed and adjust the stroke, and improves the processing precision.

Preferably, still fixedly connected with separation blade 6 on the exhibition sword main part 1, direction passageway 7 has between separation blade 6 and the exhibition sword main part 1, the one end of knife rest slider 2 extends to in the direction passageway 7, separation blade 6 is equipped with two and the symmetry sets up the both sides at knife rest slider 2. The extension section of the tool rest sliding block 2 is matched with the guide channel 7, so that the sliding direction of the tool rest sliding block 2 can be regulated and guided.

As shown in fig. 3, the transmission mechanism 4 further comprises a driving head 44 detachably connected to the pull rod 3, so as to facilitate assembly. The driving rack 42 is fixedly arranged on the side surface of the driving head 44, and the extending direction of the driving rack 42 is vertical to the extending direction of the driven rack 43.

The extension direction of the driving rack 42 is perpendicular to the extension direction of the driven rack 43 so as to ensure that the pulling direction of the pull rod 3 is perpendicular to the sliding direction of the tool rest slide 2.

As shown in fig. 3, an avoidance space 21 is provided in the tool rest slide block 2, an opening 22 is provided at a side of the avoidance space 21 close to the driving head 44, and the driving head 44 can enter or exit the avoidance space 21 through the opening 22 by moving the pull rod 3. Thus avoiding the interference between the pull rod 3 and the tool rest slide block 2 during the use process.

As shown in fig. 3, the transmission mechanism 4 further includes a lubricating channel 45 disposed in the spreader main body 1, one end of the lubricating channel 45 is communicated with a side surface of the driving head 44, the other end of the lubricating channel 45 is communicated with an avoiding groove 46, and the lubricating oil lubricates the driving head 44 through the lubricating channel 45, so as to prevent the driving head 44 and the spreader main body 1 from being worn. Dodge recess 46 and set up in exhibition sword main part 1 side and sunken to exhibition sword main part 1 is inside, and end cap 47 can dismantle and connect in lubricated passageway 45, and end cap 47's tip holding is in dodging recess 46. The plug 47 is arranged in the avoiding groove 46, so that the problem that lubricating oil leaks and the lubricating effect is reduced due to the fact that the plug 47 is separated from the avoiding groove due to collision can be prevented.

As shown in fig. 2-4, a counterweight 5 for balancing the change of the center of gravity of the tool rest slide block 2 during the sliding process is further disposed in the tool expanding main body 1.

Preferably, the counterweight 5 is connected with the spreader main body 1 in a sliding manner, and the sliding direction of the counterweight 5 is opposite to the sliding direction of the tool rest sliding block 2.

According to the invention, the balancing weight 5 for balancing the change of the gravity center in the sliding process of the tool rest sliding block 2 is arranged on the other side of the gear, so that the expanding tool can be suitable for high rotating speed. Simultaneously the weight of accessible adjustment balancing weight 5 to be applicable to the installation of the knife rest of different models and use, the general-purpose ability improves.

Further preferably, the counterweight block 5 and the tool rest sliding block 2 are respectively located at two sides of the gear 41, a plurality of meshing teeth 51 are fixedly arranged on the counterweight block 5, and the meshing teeth 51 are meshed with the gear 41.

Because the balancing weight 5 and the tool rest sliding block 2 are both meshed with the gear 41, in the using process, the balancing weight 5 and the tool rest sliding block 2 move in a reverse constant speed, and the gravity center position can be kept unchanged simply and conveniently as long as the balancing weight 5 and the total weight of the tool rest sliding block 2 with a cutter are controlled to be equal.

Referring to fig. 2 and 4, the knife unfolding main body 1 is further fixedly connected with limit stops 8, the limit stops 8 are arranged at two ends of the knife rest sliding block 2 and are symmetrically arranged, and the sliding knife rest sliding block 2 can enable the end portion of the knife rest sliding block 2 to be pressed on the limit stops 8. The limit stop 8 is used for preventing the tool rest slide block 2 from generating excessive displacement.

As shown in fig. 4, there is only one limit stop 8 to which a buffer spring 9 is fixedly connected, a buffer through hole 10 is provided on a surface of the tool holder slide block 2 near the one limit stop 8, an inner diameter of the buffer through hole 10 is equal to an outer diameter of the buffer spring 9, one end of the buffer spring 9 far from the limit stop 8 extends into the buffer through hole 10, and an end of the buffer spring 9 is fixedly connected to the tool holder slide block 2. The buffer spring 9 buffers by compression and tension to prevent the tool holder slide 2 from colliding with the limit stopper 8 as much as possible to cause damage.

The working principle of the invention is as follows: when the tool rest slide block is used, the pull rod 3 is pulled, the pull rod 3 drives the driving head 44, the driving rack 42 on the driving head 44 moves along the axial lead direction of the pull rod 3, the driving rack 42 drives the gear 41 to rotate, so that the driven rack 43 is driven, the tool rest slide block 2 provided with a machining tool slides in the direction perpendicular to the axial lead of the pull rod 3, and at the moment, the counterweight 5 and the tool rest slide block 2 move in a reverse constant speed under the driving of the meshing teeth 51. Therefore, the transmission mechanism of the invention adopts the transmission mode of the

racks

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Although the terms of the spreader main body 1, the tool rest sliding block 2, the pull rod 3, the transmission mechanism 4, the counterweight block 5, the baffle 6, the guide channel 7, the limit stop 8, the buffer spring 9, the buffer through hole 10, the avoiding space 21, the opening 22, the gear 41, the driving rack 42, the driven rack 43, the driving head 44, the lubricating channel 45, the avoiding groove 46, the plug 47, the meshing teeth 51 and the like are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. The utility model provides a back clearance formula exhibition tool bit that can eliminate, includes exhibition sword main part (1) and knife rest slider (2) of sliding connection on exhibition sword main part (1), the one end of pull rod (3) extends to in exhibition sword main part (1), and the tip of pull rod (3) takes place through being used for driving knife rest slider (2) and is connected its characterized in that with the gliding drive mechanism of pull rod (3) axial lead looks vertically direction (4) and knife rest slider (2) drive: the transmission mechanism (4) comprises a gear (41), and the side surface of the gear (41) is simultaneously meshed with a driving rack (42) arranged on the pull rod (3) and a driven rack (43) arranged on the bottom surface of the tool rest sliding block (2).

2. The backlash-eliminating deployable tip of claim 1, wherein: the transmission mechanism (4) further comprises a driving head (44) detachably connected with the pull rod (3), the driving rack (42) is fixedly arranged on the side face of the driving head (44), and the extending direction of the driving rack (42) is perpendicular to the extending direction of the driven rack (43).

3. The backlash-eliminating deployable tip of claim 2, wherein: be equipped with in knife rest slider (2) and dodge space (21), dodge space (21) and be close to one side of drive head (44) and be equipped with opening (22), remove pull rod (3) and can make drive head (44) get into or withdraw from dodging space (21) through opening (22).

4. The backlash-eliminating deployable tip of claim 3, wherein: drive mechanism (4) are still including setting up lubricated passageway (45) in exhibition sword main part (1), lubricated passageway (45) one end is linked together with the side of drive head (44), and the other end intercommunication has dodges recess (46), dodge recess (46) and set up in exhibition sword main part (1) side and sunken to exhibition sword main part (1) is inside, and end cap (47) can be dismantled and connect in lubricated passageway (45), and the tip holding of end cap (47) is in dodging recess (46).

5. The backlash-eliminating deployable tip of claim 1, wherein: still be equipped with in exhibition sword main part (1) and be used for balancing knife rest slider (2) slip in-process and lead to balancing weight (5) that the focus changes.

6. The backlash-eliminating deployable head of claim 5, wherein: balancing weight (5) and exhibition sword main part (1) sliding connection, and the slip direction of balancing weight (5) is opposite with the slip direction of knife rest slider (2).

7. The backlash-eliminating deployable head of claim 6, wherein: the balancing weight (5) and the tool rest sliding block (2) are respectively located on two sides of the gear (41), a plurality of meshing teeth (51) are fixedly arranged on the balancing weight (5), and the meshing teeth (51) are meshed with the gear (41).

8. The backlash-eliminating deployable tip of claim 1, wherein: exhibition sword main part (1) is gone up still fixedly connected with separation blade (6), direction passageway (7) have between separation blade (6) and exhibition sword main part (1), the one end of knife rest slider (2) extends to in direction passageway (7).

9. The backlash-eliminating deployable tip of claim 1, wherein: still fixedly connected with limit stop (8) on exhibition sword main part (1), limit stop (8) are equipped with two and the symmetry sets up the both ends at knife rest slider (2), and slip knife rest slider (2) can make the tip pressure of knife rest slider (2) establish on limit stop (8).

10. The backlash-eliminating deployable head of claim 9, wherein: fixedly connected with buffer spring (9) on having and only a limit stop (8), the one end surface that knife rest slider (2) is close to this limit stop (8) is equipped with buffering through-hole (10), the internal diameter of buffering through-hole (10) equals the external diameter of buffer spring (9), the one end that limit stop (8) were kept away from in buffer spring (9) extends to buffering through-hole (10) and the tip fixed connection of buffer spring (9) is on knife rest slider (2).