CN219292850U

CN219292850U - Anticreep formula milling cutter fixed establishment

Info

Publication number: CN219292850U
Application number: CN202320325827.4U
Authority: CN
Inventors: 叶迪士; 黎明; 张卫军; 李家祥
Original assignee: Ningbo Zhaoyin Aluminum Co ltd
Current assignee: Ningbo Zhaoyin Aluminum Co ltd
Priority date: 2023-02-27
Filing date: 2023-02-27
Publication date: 2023-07-04
Anticipated expiration: 2033-02-27

Abstract

The utility model relates to the technical field of cutter installation of machining centers and discloses an anti-drop type milling cutter fixing mechanism, which comprises a cutter holder, a cutter shaft rotatably arranged on the cutter holder and a milling cutter detachably arranged at the lower end of the cutter holder, wherein an inserting rotating mechanism is arranged between the milling cutter and the cutter shaft and comprises a groove which is recessed at the end part of the cutter shaft and can be used for locally inserting the upper end of the milling cutter, a slot which is recessed at the end part of the groove along the axial direction of the cutter shaft and a rotating groove which extends around the circumference of the cutter shaft at the bottom of the slot, a sliding block which can be inserted into the slot and slide along the rotating groove is convexly arranged on the outer annular wall of the milling cutter, when the sliding block slides to the bottom of the rotating groove, a limiting part which can slide around the rotating groove is telescopic is arranged on the side wall of the rotating groove, and the telescopic movement of the limiting part is controlled by a driving part.

Description

Anticreep formula milling cutter fixed establishment

Technical Field

The utility model relates to the technical field of machining center cutter installation, in particular to an anti-falling type milling cutter fixing mechanism.

Background

Milling tools are rotary tools for milling machining having one or more cutter teeth. During operation, each cutter tooth sequentially cuts off the allowance of a workpiece intermittently, however, the existing milling cutter fixing mechanism for the machining center still has the defects: when the cutter is manually replaced, because the cutter is tightly fastened with the cutter shaft through the inner hexagon bolts which are vertically arranged, when an operator uses the tool to rotate the inner hexagon bolts on the cutter shaft away from the milling cutter, if the weight of the milling cutter is large, the operator cannot hold or hold the milling cutter stably by one hand, the milling cutter can fall off from the cutter shaft, the milling cutter is easy to fall and damage, and the operator is easy to be injured by smashing, so that the safety risk exists.

Based on the above-mentioned problem, chinese patent publication No. CN218476334U discloses an anticreep formula numerically controlled fraise machine milling cutter fixed establishment, including blade holder, rotate the arbor of installing on the blade holder and the milling cutter of demountable installation at the arbor lower extreme, the front end of arbor is screwed and is connected with the hexagon socket head cap screw that runs through the arbor, hexagon socket head cap screw's inner is laminated with the outer wall of milling cutter, the lower extreme of blade holder is provided with the anticreep mechanism that is used for milling cutter anticreep spacing in the outside of milling cutter, and this anticreep mechanism includes a swivel that can dismantle and rotate on the blade holder, and swivel inner ring wall protrusion establishes the pulley, can supply the pulley to insert and the guide to slide in the recess of milling cutter outer ring wall, is provided with the telescopic part that can drive the pulley and stretches out and draw back on swivel ring, is provided with the spacing part that the relative blade holder of restriction swivel ring on the swivel ring.

In the structure, when the milling cutter works, the pulley and the wheel groove are driven to be in a separation state through the telescopic part, so that the milling cutter is ensured to smoothly rotate along with the cutter shaft, when the milling cutter needs to be disassembled, firstly, the pulley is driven to extend to be in plug-in fit with the wheel groove through the telescopic part, then, the inner hexagon bolt is removed through the tool, then, the circumferential limit of the rotary ring is removed, the rotary ring is rotated to be separated from the cutter seat, the rotary ring and the milling cutter can be simultaneously removed, finally, the pulley is separated from the milling cutter through the telescopic part, the separation of the milling cutter and the rotary ring is realized, therefore, the milling cutter needs to be disassembled, at least eight steps are required for installation and disassembly, and the problem of inconvenient disassembly exists.

Disclosure of Invention

Aiming at the defect that the disassembly and assembly of the milling cutter and the cutter holder are inconvenient due to the anti-drop type milling cutter fixing mechanism in the prior art, the utility model provides the anti-drop type milling cutter fixing mechanism convenient to disassemble and assemble.

In order to solve the technical problems, the utility model is solved by the following technical scheme:

the utility model provides an anticreep formula milling cutter fixed establishment, includes the blade holder, rotates the arbor of installing on the blade holder and can dismantle the milling cutter that sets up in the blade holder lower extreme, is provided with grafting rotary mechanism between milling cutter and the arbor, grafting rotary mechanism includes the recess that can supply milling cutter upper end partial insert in the tip of arbor, in the slot of recess tip along the axial sunken slot of arbor and in the slot bottom around the rotatory groove of circumference extension of arbor, protruding the being equipped with of outer ring wall at milling cutter can insert the slot and follow rotatory groove slider that slides, when the slider slides to rotatory groove bottom, the lateral wall of rotatory groove stretches out and draws back to have spacing slider around the gliding spacing part of rotatory groove, spacing part's flexible is controlled by a drive part.

By adopting the scheme, after the milling cutter is spliced with the cutter shaft and the sliding block rotates to the rotary groove, firstly, one hand utilizes the driving part to shrink the limiting part, and the other hand rotates the sliding block until the sliding block is abutted with the bottom of the rotary groove; then, the driving part is used for enabling the limiting part to extend out, three side walls of the sliding block are attached to three wall surfaces of the rotary groove, one side wall of the sliding block is attached to the limiting part, and then the limiting cutter is axially and circumferentially displaced relative to the cutter shaft, only two steps are needed for mounting or dismounting, and when the cutter is dismounted, the milling cutter is still in a state connected with the cutter shaft when the limiting part is released from limiting due to the insertion and rotation cooperation of the sliding block and the rotary groove, so that the falling of the milling cutter is avoided, the operation safety is improved, and therefore, the milling cutter fixing mechanism is convenient to dismount and mount and high in dismounting safety.

Preferably, the limiting member includes a receiving groove recessed in a side wall of the rotating groove, and a stopper which is fully retracted into the receiving groove or partially extended from the receiving groove.

By adopting the scheme, the stop block realizes the limit slide block or the abdication slide block through the extension.

Preferably, the stop block is in clearance fit or plug fit with the side wall of the side of the rotary groove away from the accommodating groove.

By adopting the scheme, the limit of the stop block to the sliding block can be realized through the arrangement, wherein the resistance of the stop block is better when the stop block is in plug-in fit with the side wall of the rotary groove on one side far away from the accommodating groove.

Preferably, the driving part comprises an elastic part, a shifting part and a stepping groove, wherein two ends of the elastic part are respectively and fixedly connected with the bottom of the accommodating groove and the stop block, the shifting part is vertically arranged on the side wall of the stop block in a protruding mode and extends out of the accommodating groove, and the stepping groove is arranged on the outer annular wall of the tool apron, is communicated with the accommodating groove and can be used for enabling the shifting part to axially slide along the cutter shaft.

By adopting the scheme, the stop block can be driven to retract towards the direction of the accommodating groove by utilizing the stirring of the stirring piece to overcome the elastic force of the elastic piece, so that the unlocking of the sliding block is realized; after the shifting piece is loosened, the stop block can automatically stretch out and reset under the action of the reset force of the elastic piece, and the sliding block is blocked again.

Preferably, the cutter shaft is provided with a mounting mechanism which is convenient for mounting the driving part, the mounting mechanism comprises a bolt, the accommodating groove is mounted at the lower end of the rotating groove and is connected with a thread groove penetrating through the lower end of the cutter shaft, the bolt is matched with the thread groove, two ends of the elastic piece are fixedly connected with the bolt and the stop block respectively, and the lower end of the abdicating groove penetrates through the lower end of the cutter shaft.

By adopting the scheme, the bolt has the following advantages: 1. the installation and the limit of the stop block and the elastic piece are convenient; 2. the setting of the abdication groove is convenient, and the setting of the shifting piece is convenient; 3. the elastic coefficient of the elastic piece can be adjusted by adjusting the positions of the bolt and the thread groove.

Preferably, the inserting rotating mechanism and the limiting part are symmetrically arranged in two groups around the circumference of the cutter shaft.

By adopting the scheme, after two groups are symmetrically arranged, on one hand, the locking of the milling cutter and the cutter shaft is more stable; on the other hand, the operation of one hand at the same time is convenient.

Preferably, the cutter shaft is rotatably arranged on the cutter holder through a bearing, and a limiting mechanism for limiting axial sliding of the cutter shaft relative to the cutter holder is arranged between the cutter shaft and the milling cutter.

By adopting the scheme, the cutter shaft is in running fit with the cutter holder through the bearing, and after the axial limit between the cutter shaft and the cutter holder, the cutter shaft is more stable when rotating relative to the cutter holder.

Preferably, the limiting mechanism comprises a baffle ring which is convexly arranged at one end of the cutter shaft, which is far away from the milling cutter, and is abutted against the bearing inner ring, and one side of the sliding block, which is close to the cutter holder, is abutted against one end of the bearing inner ring, which is far away from the baffle ring.

By adopting the scheme, the baffle ring is only arranged on one side of the cutter shaft, so that the cutter shaft and the bearing are conveniently assembled, and the other end of the baffle ring is limited through the sliding block, so that the sliding block can realize the relative axial limiting of the cutter shaft and the milling cutter and simultaneously can also play a role in axial limiting between the cutter shaft and the cutter holder.

The utility model has the remarkable technical effects due to the adoption of the technical scheme: after the milling cutter is spliced with the cutter shaft and the sliding block rotates to the rotary groove, firstly, one hand utilizes the driving part to shrink the limiting part, and the other hand rotates the sliding block until the sliding block is abutted with the bottom of the rotary groove; then, the driving part is used for enabling the limiting part to extend out, three side walls of the sliding block are attached to three wall surfaces of the rotary groove, one side wall of the sliding block is attached to the limiting part, and then the limiting cutter is axially and circumferentially displaced relative to the cutter shaft, only two steps are needed for mounting or dismounting, and when the cutter is dismounted, the milling cutter is still in a state connected with the cutter shaft when the limiting part is released from limiting due to the insertion and rotation cooperation of the sliding block and the rotary groove, so that the milling cutter is prevented from falling, the operation safety is improved, and therefore, the milling cutter fixing mechanism is convenient to dismount and mount and high in dismounting safety.

Drawings

Fig. 1 is an isometric view of an anti-drop milling cutter fixing mechanism of the present embodiment;

fig. 2 is a front view of a drop-off prevention type milling cutter fixing mechanism of the present embodiment;

FIG. 3 is a cross-sectional view of A-A of FIG. 2;

fig. 4 is a cross-sectional view of B-B of fig. 3.

The names of the parts indicated by the numerical reference numerals in the above drawings are as follows: 1. a tool apron; 2. a cutter shaft; 201. a slot; 202. a rotary groove; 203. a groove; 3. a bearing; 4. a baffle ring; 5. a milling cutter; 6. a stop block; 7. a slide block; 8. a relief groove; 9. a shifting piece; 10. a receiving groove; 11. an elastic member; 12. and (5) a bolt.

Description of the embodiments

The present utility model will be described in further detail with reference to the accompanying drawings and examples.

Examples

The utility model provides an anticreep formula milling cutter 5 fixed establishment, refers to the fig. 1 and shows, includes blade holder 1, rotates the arbor 2 of installing on blade holder 1 and can dismantle the milling cutter 5 that sets up in blade holder 1 lower extreme, arbor 2 rotates through a bearing 3 and sets up on blade holder 1, and blade holder 1 passes through the fix with screw on machining center or numerical control milling machine.

An inserting rotary mechanism is arranged between the milling cutter 5 and the cutter shaft 2, and referring to fig. 2-4, the inserting rotary mechanism comprises a groove 203 recessed at the end part of the cutter shaft 2 and used for the upper end of the milling cutter 5 to be partially inserted, a slot 201 recessed along the axial direction of the cutter shaft 2 at the end part of the groove 203, and a rotary groove 202 extending along the circumferential direction of the cutter shaft 2 at the bottom of the slot 201, a sliding block 7 which can be inserted into the slot 201 and slide along the rotary groove 202 is convexly arranged on the outer annular wall of the milling cutter 5, a limiting part for limiting the sliding of the sliding block 7 around the rotary groove 202 is telescopic at the side wall of the rotary groove 202, the limiting part comprises a containing groove 10 recessed at the side wall of the rotary groove 202 and a stop 6 which can be fully retracted into the containing groove 10 or partially extended out of the containing groove 10, when the sliding block 7 slides to the bottom of the rotary groove 202, at this moment, three side walls of the sliding block 7 are jointed with three wall surfaces of the rotary groove 202, one side wall of the sliding block 7 is jointed with the limiting part, so that the limiting part 5 rotates relative to the axial direction and the circumferential direction of the cutter shaft 2.

The expansion and contraction of the stop block 6 is controlled by a driving part, the driving part comprises an elastic part 11, a shifting part 9 and a stepping groove 8, wherein the two ends of the elastic part 11 are respectively and fixedly connected with the bottom of the accommodating groove 10 and the stop block 6, the shifting part 9 is vertically arranged on the side wall of the stop block 6 in a protruding mode and extends out of the accommodating groove 10, the stepping groove 8 is arranged on the outer annular wall of the tool apron 1, is communicated with the accommodating groove 10 and can be used for the shifting part 9 to slide along the axial direction of the tool shaft 2, the elastic part 11 is a spring, and two groups of inserting rotating mechanisms and limiting parts are symmetrically arranged around the circumferential direction of the tool shaft 2; on the other hand, two shifting parts are convenient to operate simultaneously by one hand.

In order to facilitate the assembly of the driving part and the cutter shaft 2, a mounting mechanism for facilitating the mounting of the driving part is arranged on the cutter shaft 2, the mounting mechanism comprises a bolt 12, a containing groove 10 is arranged at the lower end of a rotating groove 202 and is connected with a threaded groove penetrating through the lower end of the cutter shaft 2, the bolt 12 is matched with the threaded groove, two ends of a spring are respectively fixedly connected with the bolt 12 and a stop block 6, the lower end of a relief groove 8 penetrates through the lower end of the cutter shaft 2, after the setting, a deflector rod and the stop block 6 are integrally arranged and still mounted on the cutter shaft, and the setting of the bolt 12 has the following advantages: 1. the stop block 6 and the elastic piece 11 are convenient to install and limit; 2. the lower end of the abdication groove 8 is directly penetrated and arranged for inserting the poking piece 9, and the bolt 12 and the thread groove are assembled for supporting the elastic piece 11; 3. the elastic coefficient of the elastic member 11 can also be adjusted by adjusting the position of the bolt 12 in the thread groove.

The cutter shaft 2 and the milling cutter 5 are provided with a limiting mechanism for limiting the axial sliding of the cutter shaft 2 relative to the cutter holder 1, the limiting mechanism comprises a baffle ring 4 which is convexly arranged at one end of the cutter shaft 2 away from the milling cutter 5 and is abutted against an inner ring of the bearing 3, one side of the sliding block 7, which is close to the cutter holder 1, is abutted against one end of the inner ring of the bearing 3, which is away from the baffle ring 4, and the baffle ring 4 is only arranged at one side of the cutter shaft 2, so that the cutter shaft 2 and the bearing 3 are conveniently assembled, and the other end of the sliding block is limited through the sliding block 7, so that the sliding block 7 can also play a role in limiting the axial direction between the cutter shaft 2 and the cutter holder 1 while realizing the relative axial limiting of the cutter shaft 2 and the milling cutter 5.

The milling cutter 5 assembling process comprises the following steps:

1. the milling cutter 5 is inserted into the groove of the cutter shaft 2 by two hands until the sliding block 7 is inserted into the bottom of the slot 201, and the milling cutter 5 is rotated until the sliding block 7 is rotated to the stop block 6;

2. one hand dials down the dial 9 and the other hand rotates the milling cutter 5 until the bottom of the rotary groove 202, the dial 9 is loosened, and the stop 6 automatically protrudes out to stop the slide 7.

The milling cutter 5 dismantling process:

1. one hand dials down the shifting piece 9, and after the stop block 6 is contracted, the other hand rotates the milling cutter 5 until the sliding block 7 is far away from the stop block 6;

2. the milling cutter 5 is grasped by both hands and rotated, and after the slide block 7 moves to the slot 201, the milling cutter 5 is pulled out from the groove.

Claims

1. The utility model provides an anticreep formula milling cutter fixed establishment, includes blade holder (1), rotates arbor (2) of installing on blade holder (1) and can dismantle milling cutter (5) of setting in blade holder (1) lower extreme, its characterized in that: an inserting rotary mechanism is arranged between the milling cutter (5) and the cutter shaft (2), the inserting rotary mechanism comprises a groove (203) which is recessed at the end part of the cutter shaft (2) and can be used for locally inserting the upper end of the milling cutter (5), a slot (201) which is recessed at the end part of the groove (203) along the axial direction of the cutter shaft (2) and a rotary groove (202) which is arranged at the bottom of the slot (201) and extends around the circumference of the cutter shaft (2), a sliding block (7) which can be inserted into the slot (201) and slide along the rotary groove (202) is convexly arranged on the outer annular wall of the milling cutter (5), and when the sliding block (7) slides to the bottom of the rotary groove (202), a limiting part which limits the sliding of the sliding block (7) around the rotary groove (202) is stretched and contracted by a driving part.

2. The anti-drop milling cutter fixing mechanism according to claim 1, wherein: the limiting component comprises a containing groove (10) recessed in the side wall of the rotating groove (202), and a stop block (6) which can be fully retracted into the containing groove (10) or partially extended out of the containing groove (10).

3. The anti-drop milling cutter fixing mechanism according to claim 2, wherein: the stop block (6) is in clearance fit or plug fit with the side wall of the side of the rotary groove (202) away from the accommodating groove (10).

4. The anti-drop milling cutter fixing mechanism according to claim 2, wherein: the driving part comprises an elastic piece (11) with two ends fixedly connected with the bottom of the accommodating groove (10) and the stop block (6), a shifting piece (9) vertically protruding from the side wall of the stop block (6) and extending out of the accommodating groove (10), and a stepping-down groove (8) which is arranged on the outer annular wall of the tool apron (1), is communicated with the accommodating groove (10) and can be used for the shifting piece (9) to axially slide along the cutter shaft (2).

5. The anti-drop milling cutter fixing mechanism according to claim 4, wherein: the cutter shaft (2) is provided with a mounting mechanism which is convenient for mounting the driving part, the mounting mechanism comprises a bolt (12), the accommodating groove (10) is mounted at the lower end of the rotating groove (202) and is connected with a thread groove penetrating through the lower end of the cutter shaft (2), the bolt (12) is matched with the thread groove, two ends of the elastic piece (11) are fixedly connected with the bolt (12) and the stop block (6) respectively, and the lower end of the abdicating groove (8) penetrates through the lower end of the cutter shaft (2).

6. The anti-drop milling cutter fixing mechanism according to claim 1, wherein: the splicing rotating mechanism and the limiting part are symmetrically arranged in two groups around the circumference of the cutter shaft (2).

7. The anti-drop milling cutter fixing mechanism according to claim 1, wherein: the cutter shaft (2) is rotatably arranged on the cutter holder (1) through a bearing (3), and a limiting mechanism for limiting the axial sliding of the cutter shaft (2) relative to the cutter holder (1) is arranged between the cutter shaft (2) and the milling cutter (5).

8. The anti-drop milling cutter fixing mechanism according to claim 7, wherein: the limiting mechanism comprises a baffle ring (4) which is convexly arranged at one end of the cutter shaft (2) away from the milling cutter (5) and is abutted against the inner ring of the bearing (3), and one side of the sliding block (7) close to the cutter holder (1) is abutted against one end of the inner ring of the bearing (3) away from the baffle ring (4).