CN114131062A

CN114131062A - Clamp for machining key groove of motor shaft

Info

Publication number: CN114131062A
Application number: CN202111662270.5A
Authority: CN
Inventors: 张锡华; 田文松; 赵建东; 王德新; 王鹏; 邓吉兴
Original assignee: TIANJIN TIANHAI PRECISION FORGING CO Ltd
Current assignee: TIANJIN TIANHAI PRECISION FORGING CO Ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-03-04

Abstract

The invention provides a jacket comprising a plurality of annularly arranged clamping lobes, the plurality of clamping lobes can approach or move away from the center synchronously; a tip arranged coaxially with the jacket; an axial positioning fork and an angular positioning The axial positioning fork is placed between the jacket and the top, and the axial positioning fork can move along the axial direction of the top. The axial positioning fork includes two fork feet, the axis of the jacket passes between the two fork feet, and the shaft The locating fork can move in the vertical direction; the top end of the angle locating block extends upwards with a plug-in block, and the angle locating block can move in the vertical direction. The invention adopts the axial positioning fork to cooperate with the shaft shoulder on the motor shaft to determine the axial position of the motor shaft, and uses the angle positioning block to be inserted into the previously machined keyway to determine the initial angle of the workpiece to be processed, so as to facilitate the processing After the workpiece is rotated by a predetermined angle, the position of the finishing keyway is the same as that of the roughing keyway, which improves the machining accuracy.

Description

Clamp for machining key groove of motor shaft

Technical Field

The invention belongs to the field of workpiece machining, and particularly relates to a clamp for machining a key groove of a motor shaft.

Background

In the motor shaft course of working, need set up even a plurality of keyways of seting up on the motor shaft, in the course of working, need make the motor shaft rotate certain angle after every keyway processing is accomplished, after accomplishing the keyway processing, need carry out heat treatment to the motor shaft, carry out the finish machining of keyway once more at last to accomplish the processing of a motor shaft, so, in the course of working, because need carry out heat treatment to the work piece, need carry out twice clamping processing, cause the work piece angle to appear the deviation easily in the front and back clamping process, reduce the machining precision of work piece.

Disclosure of Invention

In view of this, the present invention is directed to provide a fixture for machining a keyway of a motor shaft, so as to machine the motor shaft and ensure the machining precision of a workpiece.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a anchor clamps for motor shaft keyway processing includes

The clamping device comprises a clamping sleeve, a clamping device and a clamping device, wherein the clamping sleeve comprises a plurality of clamping petals which are annularly arranged, and the plurality of clamping petals can synchronously approach or depart from the center;

the centre is coaxially arranged with the jacket;

the axial positioning fork is arranged between the jacket and the tip and can axially move along the tip, the axial positioning fork comprises two fork legs, the axis of the jacket penetrates through the space between the two fork legs, and the axial positioning fork can vertically move;

the angle positioning block is arranged between the jacket and the tip, the top end of the angle positioning block extends upwards to form an insertion block, and the angle positioning block can move along the vertical direction;

the axial positioning fork and the angle positioning block can respectively move between the tip and the jacket along the axial direction of the tip.

Furthermore, the fixture further comprises a first positioning block and a positioning strip, wherein the positioning strip is arranged between the top and the jacket, the length direction of the positioning strip is parallel to the axial direction of the top, a first guide groove is formed in the bottom of the first positioning block, the positioning strip is arranged in the first guide groove, the bottoms of the two fork legs are respectively connected with the first guide block, a first guide hole is formed in the middle of the first positioning block in the vertical direction, and the first guide block is arranged in the first guide hole.

Furthermore, the fixture further comprises a second positioning block, a second guide groove is formed in the bottom of the second positioning block, the positioning strip is arranged in the second guide groove, the angle positioning block further comprises a second guide block, a second guide hole is formed in the middle of the second positioning block in the vertical direction, and the second guide block is arranged in the second guide hole.

Furthermore, protruding parts extend upwards from two sides of the tops of the first positioning block and the second positioning block respectively, a positioning cylinder is fixedly arranged in each protruding part respectively, a positioning head is fixedly arranged at the end part of a piston rod of each positioning cylinder respectively, and the positioning heads can move towards the axis direction of the jacket.

Furthermore, accommodation spaces are respectively formed at the bottoms of the first positioning block and the second positioning block, a lifting cylinder is fixedly arranged in each of the two accommodation spaces, and the axial positioning fork and the angle positioning block are respectively connected with piston rods of the two lifting cylinders.

Furthermore, the clamp further comprises an auxiliary feeding plate, a V-shaped groove is formed in the top of the auxiliary feeding plate, and the axis of the jacket penetrates through the V-shaped groove.

Furthermore, the lower part of the auxiliary feeding plate is fixedly connected with a supporting block, a third guide groove is formed in the bottom of the supporting block, and the positioning strip is arranged in the third guide groove, so that the supporting block can move along the direction of the positioning strip.

Furthermore, a gap is reserved between every two clamping flaps, and a rubber block is filled in the gap.

Furthermore, the outer side of the clamping flap is provided with a clamping inclined surface, the clamping sleeve is sleeved with a locking ring, the locking ring can move axially along the clamping sleeve, and the locking ring can tightly abut against the clamping inclined surface in the movement process, so that the clamping flap moves towards the center of the clamping sleeve.

Compared with the prior art, the clamp for machining the key groove of the motor shaft has the following advantages:

according to the invention, the axial positioning fork is matched with the shaft shoulder on the motor shaft so as to determine the axial position of the motor shaft, the angle positioning block is inserted into the key groove processed in advance so as to determine the initial angle of the workpiece to be processed, so that after the workpiece to be processed rotates by a preset angle, the positions of the key groove processed in a finish mode and the key groove processed in a rough mode are the same, and the processing precision is improved;

the auxiliary feeding plate is adopted, so that the axes of the workpieces are the same, and the deviation of the central axis and the horizontal position of the workpieces in the clamping process is prevented;

adopt the block rubber to prevent that the metal fillings from getting into in the clearance of pressing from both sides the cover, prevent that the metal fillings from causing the influence to pressing from both sides the cover precision.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of the overall structure of the clamp;

FIG. 2 is an exploded view of the clamp;

FIG. 3 is an exploded view of a second locating block and an angle locating block;

FIG. 4 is an exploded view of the first positioning block and the axial positioning fork;

fig. 5 is a schematic diagram of jacket explosion.

Description of reference numerals:

1-a bottom plate; 11-long holes; 12-a positioning bar; 2-rotating table; 3-top; 4-jacket; 41-clamping flap; 42-clamping ramp; 43-a rubber block; 44-locking ring; 5-angle positioning block; 51-a plug-in block; 52-a second guide block; 521-a T-shaped slot; 6-an axial positioning fork; 61-fork leg; 62-a first guide block; 7-auxiliary feeding plate; 71-V-shaped grooves; 72-a support block; 721-a third guide groove; 8-a second positioning block; 81-a second guide groove; 82-a second pilot hole; 83-an accommodation space; 84-a protrusion; 85-positioning cylinder; 86-a positioning head; 87-a lifting cylinder; 871-T shaped head; 9-a first positioning block; 91-a first guide groove; 92-first guide hole.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The invention relates to a clamp for processing a key groove of a motor shaft, which comprises a bottom plate 1, wherein one end of the bottom plate 1 is fixedly provided with a rotating platform 2, the other end of the bottom plate is connected with a tailstock, the tailstock is provided with an apex 3, the apex 3 can move towards the rotating platform 2, a rotating shaft of the rotating platform 2 is in threaded connection with a jacket 4, the jacket 4 comprises a plurality of clamping flaps 41, the clamping flaps 41 are annularly arranged, the clamping flaps 41 can synchronously approach or depart from the center, specifically, the jacket 4 is in threaded connection with the rotating shaft of the rotating platform 2, a locking ring 44 is sleeved on the jacket 4, each clamping flap 41 is provided with one clamping flap 41, the outer side of each clamping flap 41 is provided with a clamping inclined surface 42, the locking sleeve is fixedly connected with a piston rod of an air cylinder, the locking sleeve is controlled to axially move along the jacket 4 through the air cylinder, the inner wall of the locking sleeve is tightly abutted to the clamping inclined surfaces 42 in the movement process of the locking sleeve, all the clamping flaps 41 contract inwards to clamp the end part of the motor shaft, the tip 3 and the jacket 4 are coaxially arranged, after the motor shaft is clamped, the tip 3 moves towards the jacket 4 to clamp the motor shaft, so that the motor shaft is prevented from shaking during rotation, and how to control the connection mode of the clamping sleeve, the clamping sleeve and the air cylinder and the matching relation of the air cylinder and the rotating shaft of the rotating platform 2 on the rotating platform 2 through the air cylinder are the prior art and are not described again;

an angle positioning block 5, an axial positioning fork 6 and an auxiliary feeding plate 7 are sequentially arranged between the jacket 4 and the tip 3 along the direction from the jacket 4 to the tip 3, and the three can respectively move along the axial direction of the jacket 4 between the jacket 4 and the tip 3;

specifically, a positioning strip 12 is fixedly arranged between the jacket 4 and the tip 3, the positioning strip 12 is provided with an axial positioning fork 6, the bottom of the axial positioning fork is connected with a first positioning block 9, the bottom of the first positioning block 9 is provided with a first guide groove 91, and the positioning strip 12 is arranged in the first guide groove 91, so that the first positioning block 9 can move along the length direction of the positioning strip 12; a second positioning block 8 is connected below the angle positioning block 5, a second guide groove 81 is formed in the end of the second positioning block 8, and the positioning strip 12 is arranged in the second guide groove 81, so that the second positioning block 8 can move along the length direction of the positioning strip 12; the lower portion of the auxiliary feeding plate 7 is fixedly connected with a supporting block 72, a third guide groove 721 is formed in the bottom of the supporting block 72, the positioning strip 12 is arranged in a third positioning groove, the supporting block 72 can move along the direction of the positioning strip 12, long holes 11 are formed in two sides of the positioning strip 12 respectively, the first positioning block 9 and the second positioning block 8 can be fixedly connected with the long holes 11 through bolts respectively, the relative positions of the two positioning blocks are fixed, long holes are formed in the bottom of the supporting block 72, and the supporting block 72 can be fixedly connected with the bottom plate 1 through bolts.

The angle positioning block 5 comprises a second guide block 52 and an insertion block 51, a second guide hole 82 is formed in the middle of the upper surface of the second positioning block 8 along the vertical direction, the second guide block 52 is inserted into the second guide hole 82, an accommodating space 83 is formed in the bottom of the second positioning block 8, a lifting cylinder 87 is arranged in the accommodating space 83, a piston rod of the lifting cylinder 87 is connected with the second guide block 52, and the height of the insertion block 51 is controlled by the lifting cylinder 87;

the axial positioning fork 6 comprises a first guide block 62 and two fork legs 61 fixedly connected to the top of the first guide block 62, a first guide hole 92 is formed in the middle of the upper surface of the first guide block 9 along the vertical direction, the first guide block 62 is arranged in the first guide hole 92, an accommodating space 83 is also formed in the bottom of the first guide block 9, a lifting cylinder 87 is fixedly arranged in the accommodating space 83, a piston rod of the lifting cylinder 87 is connected with the first guide block 62, specifically, a T-shaped head is fixedly arranged at the end of a piston rod of the lifting cylinder, T-shaped grooves are formed in the bottoms of the first guide block and the second guide block, and the T-shaped head and the T-shaped grooves are installed in a matched mode;

the top of the auxiliary feeding plate 7 is provided with a V-shaped groove 71, the axis of the jacket 4 penetrates through the V-shaped groove 71, the bottom of the jacket is provided with a long round hole, the supporting block 72 is connected with the auxiliary feeding plate 7 through a bolt, and the bolt penetrates through the long round hole, so that the height of the auxiliary feeding plate 7 can be adjusted;

the two sides of the tops of the first positioning block 9 and the second positioning block 8 respectively extend upwards to form protruding parts 84, a positioning cylinder 85 is fixedly arranged in each protruding part 84, a positioning head 86 is fixedly arranged at the end part of a piston rod of each positioning cylinder 85, and the positioning heads 86 can move in the axis direction of the jacket 4, so that a workpiece is fixed in the working process, the workpiece is placed to rotate under stress, the middle of the workpiece is supported, the rigidity of the workpiece is improved, and the machining precision is improved.

In order to fix the motor shaft more conveniently and prevent metal chips in the machining process from influencing machining, a gap is reserved between every two clamping flaps 41, and a rubber block 43 is filled in the gap, so that the rubber block 43 is used for preventing the metal chips from entering the gap of the clamping flaps 41 and preventing the metal chips from influencing the clamping precision of the clamping flaps 41.

In the working process, the position of the axial positioning fork 6 between the clamping strip and the tip 3 is firstly adjusted, when the motor shaft is fixed with the jacket 4, a certain shaft shoulder position on the motor shaft can abut against the side wall of the axial positioning fork 6, so that the motor shaft is axially positioned, the end part of the motor shaft is fixed by using the expansion sleeve, the other end of the motor shaft is fixed by using the tip 3, the height of the auxiliary feeding plate 7 is adjusted, the top end of the auxiliary feeding plate is in contact with the side wall of the motor shaft, so that in the subsequent processing of the motor shaft with the same specification, the auxiliary feeding plate 7 is matched with the jacket 4, the axis of the motor shaft is superposed with the axis of the motor shaft processed for the first time by matching the jacket 4 and the auxiliary feeding plate 7, the adjustment of a workpiece in the process of clamping is reduced, after the motor shaft is fixed, the axial positioning fork 6 descends, the positioning cylinder 85 abuts against the motor shaft, place the motor shaft and rotate in the course of working, prevent that the location fork from causing the influence to processing, utilize the milling machine to process the work piece, after the first processing of completion motor shaft, take off the motor shaft and carry out heat treatment, later through axial positioning fork 6, supplementary flitch 7 and the cooperation of clamp cover 4 in going up, fix the work piece in the normal position, later angle locating piece 5 rises, insert angle locating piece 5 in the keyway of first processing play, so that obtain accurate angle of placing after the motor shaft is fixed, later angle locating piece 5 descends, make angle locating piece 5 and motor shaft separation, utilize 2 rotatory motor shaft predetermined angles of revolving stage, carry out the finish machining of keyway.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. a fixture for the processing of the motor shaft keyway, it is characterized in that: comprising:

a jacket, which includes a plurality of clamping petals, and the clamping petals are arranged in a ring shape, and the multiple clamping petals can approach or move away from the center synchronously;

the top, which is arranged coaxially with the jacket;

The axial positioning fork is placed between the jacket and the top, and the axial positioning fork can move along the axial direction of the top, the axial positioning fork includes two fork legs, and the axis of the jacket passes through the two fork legs between, the axial positioning fork can move in the vertical direction;

an angle positioning block, which is placed between the jacket and the top, and a plug-in block extends upward from the top of the angle positioning block, and the angle positioning block can move in the vertical direction;

The axial locating fork and the angle locating block are respectively capable of moving in the axial direction of the apex between the apex and the jacket.

2. A fixture for machining a keyway of a motor shaft according to claim 1, further comprising a first positioning block and a positioning bar, the positioning bar is placed between the top and the jacket, and the positioning bar is The length direction of the fork is parallel to the axial direction of the top, a first guide groove is opened at the bottom of the first positioning block, the positioning strip is placed in the first guide groove, and the bottoms of the two fork feet are respectively connected with the first guide block, A first guide hole is opened in the middle of the first positioning block along the vertical direction, and the first guide block is placed in the first guide hole.

3 . The jig for machining the keyway of the motor shaft according to claim 2 , further comprising a second positioning block, the bottom of which is provided with a second guide groove, and the positioning bar is placed in the second guide groove. 4 . Inside, the angle positioning block further includes a second guide block, a second guide hole is opened in the middle of the second positioning block along the vertical direction, and the second guide block is placed in the second guide hole.

4 . The jig for machining the motor shaft keyway according to claim 3 , wherein protrusions extend upward on both sides of the tops of the first positioning block and the second positioning block respectively, and each protrusion is respectively fixed inside. 5 . There is a positioning cylinder, and a positioning head is respectively fixed at the end of the piston rod of the positioning cylinder, and the positioning head can move in the axial direction of the jacket.

5. A fixture for machining a motor shaft keyway according to claim 3, wherein the bottom of the first positioning block and the second positioning block are respectively provided with accommodating spaces, and a lift is respectively fixed in the two accommodating spaces The cylinder, the axial positioning fork and the angle positioning block are respectively connected with the piston rods of the two lifting cylinders.

6 . The jig for machining the keyway of the motor shaft according to claim 3 , wherein a T-shaped head is fixed on the end of the piston rod of the lifting cylinder, the first guide block and the second The bottom of the guide block is provided with a T-shaped groove, and the T-shaped head and the T-shaped groove are fitted together.

7. A fixture for machining a motor shaft keyway according to claim 3, further comprising an auxiliary feeding plate, the top of which is provided with a V-shaped groove, and the axis of the jacket passes through the V-shaped groove.

8 . The fixture for processing the keyway of the motor shaft according to claim 7 , wherein the lower part of the auxiliary feeding plate is fixedly connected with a support block, the bottom of the support block is provided with a third guide groove, and the The positioning bar is placed in the third guide groove, so that the support block can move along the direction of the positioning bar.

9 . The jig for machining the keyway of the motor shaft according to claim 1 , wherein a gap is left between every two clamping flaps, and a rubber block is filled in the gap. 10 .

10. A clamp for processing the keyway of a motor shaft according to claim 1, wherein a clamping slope is provided on the outer side of the clamping flap, a locking ring is provided on the outer jacket of the jacket, and the locking ring can It moves in the axial direction of the jacket, and during the movement, the locking ring can tightly abut against the clamping slope, so that the clamping flap moves toward the center of the jacket.