CN111805260A

CN111805260A - Cutter clamping mechanism of numerically controlled fraise machine

Info

Publication number: CN111805260A
Application number: CN202010763815.0A
Authority: CN
Inventors: 周凤妹
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-01
Filing date: 2020-08-01
Publication date: 2020-10-23

Abstract

The invention relates to the technical field of numerical control machining equipment and discloses a cutter clamping mechanism of a numerical control milling machine. This numerically controlled fraise machine's cutter fixture, lead to between leading to groove and the pretension through-hole to the pretension and go up the setting of pretension ball, even make pressure on the pressure mechanism can also transmit the centre gripping briquetting through a quarter turn through the pretension ball, so as to ensure that three group's centre gripping briquetting receives the influence of activity slider elasticity all the time and has the trend of moving to the inboard, and can not receive the influence of centre gripping sleeve position, and then ensure that the cutter of installing on this fixture is keeping the state of atress always, and then the phenomenon that the cutter suddenly falls can not appear at the in-process that not hard up centre gripping sleeve changed the cutter.

Description

Cutter clamping mechanism of numerically controlled fraise machine

Technical Field

The invention relates to the technical field of numerical control machining equipment, in particular to a cutter clamping mechanism of a numerical control milling machine.

Background

The milling machine is a machine tool which drives a cutter to rotate at a high speed to move mainly through a main shaft, the movement of a workpiece or the cutter is used as a feeding motion, various surfaces of the workpiece are milled flat, grooves, gear teeth and the like, and due to the difference of the machining purposes and the material of the workpiece of the milling machine, the cutter clamping mechanism needs to select and replace a proper cutter at different stages of machining in order to ensure the machining quality and the machining precision, so that the cutter clamping mechanism can be produced, and the cutter can be flexibly replaced during the milling machine machining so as to meet the requirements of production and machining.

The clamping mechanism clamps the cutter and fixes the cutter in a mode of extruding the cutter handle through various mechanisms and installs the cutter on a milling machine, so that the extruding mechanism is required to be loosened to take out the cutter when the cutter is replaced, but the cutter is always subjected to downward acting force, and the outer diameters of the cutter handles of various cutters are different, so that an operator is difficult to control the clamping force of the operator on the cutter to be just at a critical point when the clamping mechanism is loosened (namely the cutter can not freely fall and can be taken out lightly), the phenomenon that the cutter suddenly falls off is caused when the operator replaces the loosening clamping mechanism for the cutter, the cutter edge of the cutter collides with an operating platform or the surface of a workpiece to be broken, the service life of the cutter is greatly influenced, or the surface of the workpiece is scratched to cause poor machining precision of the surface of the workpiece, reliability knot stability is relatively poor, for avoiding the emergence of this type of phenomenon, though operating personnel can hold the cutter by one hand, comes not hard up fixture with the other hand, nevertheless because the cutter centre gripping all is difficult to effectual not hard up fixture when actual operation more tightly, the operation degree of difficulty is great and work efficiency is comparatively low.

Disclosure of Invention

Technical problem to be solved

The invention provides a cutter clamping mechanism of a numerical control milling machine, which has the advantages of automatically pre-tightening and clamping a cutter, avoiding the phenomenon that the cutter suddenly falls when the cutter is replaced, effectively protecting the cutter, prolonging the service life of the cutter, being simple and convenient to operate and having higher stability, solving the problem that an extrusion mechanism is required to be loosened to take out the cutter when the cutter is replaced, but the cutter is always acted by a downward force and the outer diameters of cutter shanks of various cutters are different, so that an operator is difficult to control the clamping force of the clamping mechanism on the cutter to be just at a critical point when the clamping mechanism is loosened, the phenomenon that the cutter suddenly falls when the operator replaces the loosened clamping mechanism with the cutter is caused, the cutter edge of the cutter collides with an operation table or the surface of a workpiece to break, and the service life of the cutter is greatly influenced, or the surface of the workpiece is scratched to cause poor machining precision of the surface of the workpiece and poor stability of the reliability junction.

(II) technical scheme

The invention provides the following technical scheme: the utility model provides a cutter fixture of numerically controlled fraise machine, includes the connecting main body, the bottom of connecting main body surface is equipped with the centre gripping screw thread, the bottom of connecting main body is equipped with the fixed recess that three annular permutation of group were arranged, and the inside of fixed recess has solid fixed splint through hexagon socket head cap screw fixed mounting, centre gripping screw thread threaded connection on the connecting main body has the centre gripping sleeve, and the lower surface swing joint of centre gripping sleeve inner chamber has the centre gripping briquetting, the top of connecting main body is equipped with the pretension through-hole of three annular arrays of group, and the bottom of pretension through-hole inner chamber is equipped with the pretension ball, the top threaded connection of pretension.

Preferably, the inside of the fixed groove on the connecting body is provided with a sliding groove, the sliding groove is located under the pre-tightening through hole, the inner wall of the sliding groove is movably connected with the fixed sliding block on the clamping pressing block, the inside of the bottom end of the connecting body is provided with a pre-tightening through groove above the sliding groove, a pre-tightening ball is arranged in an inner cavity of the pre-tightening through groove, and one end of the pre-tightening ball is in contact with one end of the fixed sliding block.

Preferably, one end of the pre-tightening through groove is communicated with the bottom end of the pre-tightening through hole, and a quarter arc-shaped curve structure with the same outer diameter as the pre-tightening ball is arranged at the connecting position between the pre-tightening through groove and the pre-tightening through hole.

Preferably, the inner side of the clamping pressing block is provided with an extrusion gasket of a wear-resistant rubber support, the outer surface of the extrusion gasket is provided with an arc-shaped mechanism, and the bottom of the extrusion gasket is internally provided with a notch.

Preferably, the outer surface of the clamping sleeve is provided with four groups of clamping grooves which are arranged in an annular array, a T-shaped structure is arranged outside the clamping grooves, and one end of the T-shaped structure on the clamping grooves extends to the inside of the clamping sleeve.

Preferably, the pressure mechanism comprises a movable sliding block, the outer wall of the movable sliding block is in contact with the top of the inner wall of the pre-tightening through hole, a pre-tightening support rod is fixedly mounted at one end of the movable sliding block, the outer surface of the pre-tightening support rod is in contact with the bottom of the inner wall of the pre-tightening through hole, one end of the pre-tightening support rod is in contact with a pre-tightening ball positioned in the pre-tightening through hole, an adjusting cylinder is fixedly mounted at the other end of the movable sliding block through a pressure spring, the outer surface of the adjusting cylinder is in threaded connection with the inner wall of the.

(III) advantageous effects

The invention has the following beneficial effects:

1. this numerically controlled fraise machine's cutter fixture, lead to between leading to groove and the pretension through-hole to the pretension and go up the setting of pretension ball, even make pressure on the pressure mechanism can also transmit the centre gripping briquetting through a quarter turn through the pretension ball, so as to ensure that three group's centre gripping briquetting receives the influence of activity slider elasticity all the time and has the trend of moving to the inboard, and can not receive the influence of centre gripping sleeve position, and then ensure that the cutter of installing on this fixture is keeping the state of atress always, and then the phenomenon that the cutter suddenly falls can not appear at the in-process that not hard up centre gripping sleeve changed the cutter.

2. This numerically controlled fraise machine's cutter fixture, to the setting of pressure mechanism, be convenient for provide an extrusion force that moves to the inboard to the centre gripping briquetting through pretension ball and fixed slider, thereby ensure that the centre gripping sleeve also can provide a clamping-force for the cutter after loosening completely, so that realize from the pretension centre gripping to the cutter, it is comparatively convenient simple to control, can come to apply different pressure to compression spring through adjusting the column body simultaneously, and then provide the not pressure of equidimension for the cutter of different diameters and quality, so that be suitable for the cutter of different specifications.

3. This numerically controlled fraise machine's cutter fixture through centre gripping briquetting and the telescopic setting of centre gripping for the centre gripping sleeve is when utilizing centre gripping screw thread to rise, makes the centre gripping briquetting under the extrusion on centre gripping sleeve inclined plane, makes its inboard removal that can be slow and extrudees the centre gripping cutter, and three group's centre gripping briquettings move the extrusion cutter inboard simultaneously, and stability knot reliability is higher, makes the gyration precision of this cutter when telling the rotation higher simultaneously.

Drawings

FIG. 1 is an exploded view of the structure of the present invention;

FIG. 2 is a schematic structural view of a connecting body according to the present invention;

FIG. 3 is a schematic half-sectional view of the structural connection body of the present invention in connection with a clamping sleeve;

FIG. 4 is a cross-sectional view of a structural joint body of the present invention;

FIG. 5 is an enlarged schematic view taken at A in FIG. 4 of the present invention;

FIG. 6 is a schematic view of a clamping block according to the present invention;

fig. 7 is a schematic structural diagram of the pressure mechanism of the present invention.

In the figure: 1. a connecting body; 2. clamping the threads; 3. fixing the groove; 4. a sliding groove; 5. pre-tightening the through groove; 6. fixing the clamping plate; 7. fixing the sliding block; 8. clamping a pressing block; 9. a clamping sleeve; 10. clamping a clamping groove; 11. pre-tightening the through hole; 12. pre-tightening the ball; 13. a pressure mechanism; 131. a movable slide block; 132. pre-tightening the supporting rod; 133. a pressure spring; 134. an adjustment cylinder; 135. a hexagonal groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, a cutter clamping mechanism of a numerically controlled milling machine comprises a connecting body 1, wherein clamping threads 2 are arranged at the bottom of the outer surface of the connecting body 1, three groups of fixing grooves 3 which are arranged in an annular array are arranged at the bottom end of the connecting body 1, a fixing clamp plate 6 is fixedly arranged in each fixing groove 3 through an inner hexagon bolt, the clamping threads 2 on the connecting body 1 are in threaded connection with a clamping sleeve 9, a clamping press block 8 is movably connected to the lower surface of the inner cavity of the clamping sleeve 9, three groups of pre-tightening through holes 11 which are arranged in an annular array are arranged at the top end of the connecting body 1, pre-tightening balls 12 are arranged at the bottom of the inner cavity of each pre-tightening through hole 11.

Wherein, to the setting of fixed recess 3 and solid fixed splint 6 so that installation solid fixed sliding block 7 for solid fixed sliding block 7 is more convenient and fast at the in-process of loading and unloading clearance.

Wherein, to the setting of centre gripping briquetting 8 and centre gripping sleeve 9 for centre gripping sleeve 9 makes centre gripping briquetting 8 make its inboard removal that can be slow and extrude the centre gripping cutter under the extrusion on centre gripping sleeve 9 inclined plane when utilizing 2 screw threads lifts, and three group's centre gripping briquetting 8 move the extrusion cutter inboard simultaneously, make the gyration precision of this cutter higher.

Among this technical scheme, the inside of fixed recess 3 is equipped with slip recess 4 on connecting body 1, and slip recess 4 is located pretension through-hole 11 under, the inner wall of slip recess 4 and the fixed slider 7 swing joint on the centre gripping briquetting 8, the inside of connecting body 1 bottom and the top that is located slip recess 4 are equipped with pretension and lead to groove 5, be equipped with pretension ball 12 in the cavity that pretension led to groove 5, the one end of pretension ball 12 and the one end contact of fixed slider 7.

Wherein, to the setting that sliding groove 4 and pretension lead to groove 5 on connecting body 1 for centre gripping briquetting 8 can be stabilized effectual inside side movement and centre gripping cutter under the extrusion that receives centre gripping sleeve 9, causes the synchronism between three group's centre gripping briquetting 8 higher, further improvement this fixture to the gyration precision when the cutter centre gripping.

In the technical scheme, one end of the pre-tightening through groove 5 is communicated with the bottom end of the pre-tightening through hole 11, and a quarter arc-shaped curve structure with the same outer diameter as the pre-tightening ball 12 is arranged at the joint between the pre-tightening through groove 5 and the pre-tightening through hole 11.

Wherein to the pretension through groove 5 and pretension through-hole 11 and go up the setting of pretension ball 12 for pressure on the pressure mechanism 13 can also transmit for the centre gripping briquetting 8 through pretension ball 12 even through a quarter turn, so as to ensure that three group centre gripping briquetting 8 receive the pressure that moves to the inboard all the time, and can not receive the influence of centre gripping sleeve 9 position, make the cutter of installing on this fixture keep the state of atress always, can not appear the phenomenon of suddenly falling at the in-process that becomes flexible centre gripping sleeve 9.

In this technical scheme, the inboard of centre gripping briquetting 8 is by the extrusion gasket of wear-resisting rubber support, and its extrusion gasket's surface establishes to arc mechanism, is equipped with the opening in the inside of extrusion gasket bottom simultaneously.

Wherein, to the setting of extrusion gasket on the centre gripping briquetting 8 for three group's centre gripping briquetting 8 can take place deformation along with the surface of cutter when moving extrusion cutter to the inboard, and then complete cladding main cutting tool is in order to increase its and fixture between frictional force, prevents that its phenomenon of skidding from appearing at the in-process of work, stability and reliability are higher.

In the technical scheme, four groups of clamping grooves 10 arranged in an annular array are arranged on the outer surface of the clamping sleeve 9, a T-shaped structure is arranged outside the clamping grooves 10, and one end of the T-shaped structure on the clamping grooves 10 extends to the inside of the clamping sleeve 9.

Wherein, to the setting of centre gripping draw-in groove 10 and exterior structure on the centre gripping sleeve 9, the operator of being convenient for utilizes the instrument to rotate circular shape centre gripping sleeve 9 to make things convenient for operating personnel not hard up or screw up centre gripping sleeve 9, the cutter that gets into to the centre gripping changes.

Referring to fig. 7, in the present technical solution, the pressure mechanism 13 includes a movable slider 131, an outer wall of the movable slider 131 contacts with a top of an inner wall of the pre-tightening through hole 11, one end of the movable slider 131 is fixedly mounted with a pre-tightening support rod 132, an outer surface of the pre-tightening support rod 132 contacts with a bottom of the inner wall of the pre-tightening through hole 11, one end of the pre-tightening support rod 132 contacts with a pre-tightening ball 12 located inside the pre-tightening through hole 11, the other end of the movable slider 131 is fixedly mounted with an adjusting cylinder 134 through a pressure spring 133, the outer surface of the adjusting cylinder 134 is in threaded connection with the inner wall of the pre-tightening through.

Wherein, to the setting of pressure mechanism 13, be convenient for come to provide the extrusion force that one moved to the inboard to the centre gripping briquetting 8 through pretension ball 12 and fixed slider 7, thereby guarantee that centre gripping sleeve 9 also can provide a clamping-force for the cutter at the back centre gripping briquetting 8 of loosening completely, avoid this fixture to appear the not hard up phenomenon that drops of cutter when changing the cutter, can come to exert different pressure to pressure spring 133 through adjusting column 134 simultaneously, and then provide the pressure of equidimension not for the cutter of different diameters and quality, in order to be applicable to the cutter of different specifications.

The use method and the working principle of the embodiment are as follows:

firstly, the clamping mechanism is fixedly installed on a milling machine, then the hexagonal groove 135 is rotated by an inner hexagonal wrench according to the outer diameter of a tool holder to be clamped, the hexagonal groove 135 moves downwards along the inner wall of the pre-tightening through hole 11 to compress the pressure spring 133, the movable sliding block 131 and the pre-tightening support rod 132 are driven to move downwards to compress the pre-tightening balls 12 in the pre-tightening through hole 11 and the pre-tightening through groove 5, the clamping pressing blocks 8 are extruded by the fixed sliding block 7 to enable the three groups of clamping pressing blocks 8 to have inward pressure, then the tool can be inserted between the three groups of clamping pressing blocks 8, stable clamping is enabled to be prevented from dropping, then the clamping sleeve 9 is clamped on the clamping groove 10 and rotated by utilizing a specific tool, the clamping sleeve 9 can be connected with the clamping thread 2 on the main body 1 to ascend, meanwhile, the clamping pressing of the clamping pressing blocks 8 slowly and the three groups of clamping pressing The cutter is further tightly clamped, when the clamping sleeve 9 is loosened when the cutter needs to be replaced, the three groups of clamping pressing blocks 8 can always keep clamping force on the cutter due to the elastic force of the pressure spring 133 and can not fall off only under the action of gravity, after the cutter is taken out, whether the pre-clamping force of the clamping mechanism is adjusted or not can be selected according to the outer diameter of the cutter to be replaced, and the steps are repeated to complete replacement of the cutter.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a cutter fixture of numerically controlled fraise machine, includes connecting body (1), its characterized in that: the bottom of connecting body (1) surface is equipped with centre gripping screw thread (2), the bottom of connecting body (1) is equipped with three fixed recess (3) of group's annular permutation and arrangement, and the inside of fixed recess (3) has solid fixed splint (6) through hexagon socket head cap screw fixed mounting, centre gripping screw thread (2) threaded connection on connecting body (1) has centre gripping sleeve (9), and the lower surface swing joint of centre gripping sleeve (9) inner chamber has centre gripping briquetting (8), the top of connecting body (1) is equipped with three pretension through-holes (11) of group's annular array, and the bottom of pretension through-hole (11) inner chamber is equipped with pretension ball (12), the top threaded connection of pretension through-hole (11) inner chamber has pressure mechanism (13).

2. The tool holding mechanism of a numerically controlled milling machine according to claim 1, wherein: the connecting body (1) is provided with a sliding groove (4) inside the fixed groove (3), the sliding groove (4) is located under the pre-tightening through hole (11), the inner wall of the sliding groove (4) is movably connected with the fixed sliding block (7) on the clamping pressing block (8), a pre-tightening through groove (5) is arranged inside the bottom end of the connecting body (1) and above the sliding groove (4), a pre-tightening ball (12) is arranged in an inner cavity of the pre-tightening through groove (5), and one end of the pre-tightening ball (12) is in contact with one end of the fixed sliding block (7).

3. The tool holding mechanism of a numerically controlled milling machine according to claim 2, wherein: one end of the pre-tightening through groove (5) is communicated with the bottom end of the pre-tightening through hole (11), and a quarter arc-shaped curve structure with the same outer diameter as that of the pre-tightening ball (12) is arranged at the joint between the pre-tightening through groove (5) and the pre-tightening through hole (11).

4. The tool holding mechanism of a numerically controlled milling machine according to claim 1, wherein: the inner side of the clamping pressing block (8) is provided with an extrusion gasket of a wear-resistant rubber support, the outer surface of the extrusion gasket is provided with an arc-shaped mechanism, and the bottom of the extrusion gasket is internally provided with a notch.

5. The tool holding mechanism of a numerically controlled milling machine according to claim 1, wherein: the outer surface of the clamping sleeve (9) is provided with four groups of clamping grooves (10) which are arranged in an annular array, a T-shaped structure is arranged outside the clamping grooves (10), and one end of the T-shaped structure on the clamping grooves (10) extends to the inside of the clamping sleeve (9).

6. The tool holding mechanism of a numerically controlled milling machine according to claim 1, wherein: pressure mechanism (13) are including activity slider (131), the outer wall of activity slider (131) contacts with the top of pretension through-hole (11) inner wall, the one end fixed mounting of activity slider (131) has pretension branch (132), and the surface of pretension branch (132) contacts with the bottom of pretension through-hole (11) inner wall, pretension branch (132) one end contacts with the pretension ball (12) that are located pretension through-hole (11) inside, the other end of activity slider (131) passes through pressure spring (133) fixed mounting and has adjusts cylinder (134), and adjusts the surface of cylinder (134) and the inner wall threaded connection of pretension through-hole (11), the inside of adjusting cylinder (134) is equipped with hexagonal recess (135).