CN217749546U

CN217749546U - Screw shearing machine capable of avoiding burrs

Info

Publication number: CN217749546U
Application number: CN202220831322.0U
Authority: CN
Inventors: 杨伟明
Original assignee: Zhejiang Prade Electric Co ltd
Current assignee: Zhejiang Prade Electric Co ltd
Priority date: 2022-04-12
Filing date: 2022-04-12
Publication date: 2022-11-08
Anticipated expiration: 2032-04-12

Abstract

The utility model discloses an avoid screw rod cutter of burr, including shearing subassembly and drive assembly, the shearing subassembly includes the shearing seat, be fixed in the stationary knife of shearing seat, articulate in the shearing arm of shearing seat, be fixed in moving the sword of shearing arm, the reset spring who is connected with the shearing arm, rotate the cam of connecting in the shearing seat, rotate the gyro wheel of connecting in the shearing arm, drive assembly includes drive cam pivoted motor and reduction gear, through the outer disc effect of cam surface and gyro wheel, the swing of drive shearing arm, the drive moves sword and stationary knife cooperation shearing screw rod, the cam surface is X with the outer disc of gyro wheel for complex conical surface and angle, give an axial component of gyro wheel when making the cam rotate. Under the action of the force, the shearing arm moves along the axial direction of the bolt, so that the movable cutter and the fixed cutter are always pressed on the shearing end face, and when the movable cutter and the fixed cutter are matched to complete the shearing of the screw rod, a gap is basically not formed between the movable cutter and the fixed cutter, and the situation that burrs are formed on the sheared screw rod due to the gap between the movable cutter and the fixed cutter can be avoided.

Description

Screw shearing machine capable of avoiding burrs

[ technical field ] A method for producing a semiconductor device

The utility model belongs to the technical field of the cutting process, concretely relates to avoid screw rod cutter of burr.

[ background of the invention ]

The common screw shearing machine comprises a shearing seat, a fixed cutter fixed on the shearing seat, a shearing arm and a movable cutter fixed on the shearing arm, wherein the movable cutter and the fixed cutter are matched with each other to shear a screw, and the shearing process is to act on the shearing end face of the screw through the matching of the cutting edges of the movable cutter and the fixed cutter. In the actual shearing process, the movable knife and the fixed knife are not completely attached and have no gap, so that burrs are formed on the sheared screw rod due to the gap between the movable knife and the fixed knife.

[ Utility model ] content

Not enough to prior art, the utility model aims to solve the technical problem that a screw rod shearing machine of avoiding the burr is provided, avoids being cuted the screw rod owing to have the gap and form the burr between moving sword and the stationary knife.

In order to solve the technical problem, the utility model adopts the following technical scheme: the utility model provides an avoid screw rod cutter of burr, includes shearing subassembly and drive assembly, shearing subassembly includes the shearing base, is fixed in the stationary knife of shearing base, articulates in the shearing arm of shearing base, is fixed in the shearing arm move the sword, with reset spring, the swing of being connected of shearing arm and connect in the cam of shearing base, rotate the gyro wheel of connecting in the shearing arm, drive assembly includes drive cam pivoted motor and reduction gear, through cam surface and the outer disc effect of gyro wheel, drive shearing arm swing, drive move sword and stationary knife cooperation shearing screw rod, cam surface and the outer disc of gyro wheel are the complex conical surface and the angle is X °, give an axial component of gyro wheel when making the cam rotate.

Preferably, the edge of the shearing seat is provided with a screw positioning notch, a fixed knife fixing groove is arranged below the screw positioning notch on the front side surface of the shearing seat, and the fixed knife is fixed on the fixed knife fixing groove.

Preferably, the rear side of the shearing arm is provided with a movable blade fixing groove, the movable blade is fixed on the movable blade fixing groove, and the front side of the shearing base is provided with a movable blade positioning surface above the screw positioning notch.

Preferably, a bolt is fixed on the shearing seat, the rear end of the bolt penetrates through an upper shaft hole of the shearing seat and is connected with a nut, and a limiting flange is arranged at the front end of the bolt and is positioned on the front side of the shearing arm.

Preferably, the shearing assembly further comprises a track plate connected with the shearing arm, a shaft head is arranged on the front side of the limiting flange at the front end of the bolt, the track plate is rotatably connected to the shaft head, a track groove is formed in the track plate, and a track pin shaft matched with the track groove to drive the shearing arm to reset is arranged on the cam.

Preferably, X has a value in the range of 3 to 8.

Preferably, the speed reducer is a planetary gear speed reducer, the planetary gear speed reducer includes a preceding stage speed reduction gear set, a planetary carrier, a plurality of planetary gears mounted on the planetary carrier, and a planetary gear box having an annulus gear, the plurality of planetary gears are engaged with the annulus gear of the planetary gear box, the preceding stage speed reduction gear set is provided with an output sun gear, and the output sun gear is engaged with the plurality of planetary gears.

Preferably, the planet carrier has a flat square hole at the center thereof, the cam has a center shaft, and the center shaft has a flat square portion fitted into the flat square hole.

As preferred, still be equipped with the micro-gap switch of control motor, micro-gap switch locates planet carrier excircle side, be equipped with the recess on the excircle of planet carrier, micro-gap switch is equipped with the switch shell fragment, the switch shell fragment be equipped with the excircle movable contact of planet carrier and go into the protruding portion of recess when corresponding with the groove position, when the excircle movable contact of protruding portion and planet carrier, micro-gap switch is closed, when the protruding portion card goes into the recess, the micro-gap switch disconnection.

Preferably, the position of the protruding part is provided with a switch roller which is in rolling contact with the outer circle of the planet carrier.

The utility model adopts the above technical scheme, following beneficial effect has:

1. the cam makes circular motion around the center of a circle on the shearing seat, the shearing arm swings around the bolt, the shearing arm is provided with a roller, the shearing arm is driven to swing by the action of the cam surface and the outer circular surface of the roller, the movable cutter and the fixed cutter are driven to be matched with the shearing screw rod, and the force applied to the roller when the cam rotates has an axial component force F2 besides the force F1 for driving the shearing arm to swing as the cam surface and the outer circular surface of the roller are matched conical surfaces and have an angle X degrees; and because the shearing arm takes the bolt as a supporting point, the shearing arm has a force F3, and under the action of the force F3, the shearing arm moves along the axial direction of the bolt, so that the movable cutter and the fixed cutter are always pressed on the shearing end surface, and when the movable cutter and the fixed cutter are matched to complete the shearing of the screw rod, a gap is basically not formed between the movable cutter and the fixed cutter, and burrs of the sheared screw rod caused by the gap between the movable cutter and the fixed cutter can be avoided.

2. The fixed knife mounting position is ensured through the fixed knife fixing groove, the movable knife mounting position is ensured through the movable knife fixing groove, the movable knife positioning surface is arranged on the front side surface of the shearing seat above the screw rod positioning notch, the movable knife is tightly pressed and attached to the movable knife positioning surface to move towards the fixed knife under the action of force F3, and the relative position of the fixed knife mounting position and the movable knife positioning surface is determined, so that when the screw rod shearing is completed by matching the movable knife and the fixed knife, a gap is basically not formed between the fixed knife and the fixed knife.

3. If the numerical value of X is too small, the axial component force for the roller is too small, the force for driving the movable knife is insufficient, the gap between the fixed knife and the movable knife cannot be reduced well, and the shearing force for driving the movable knife can be reduced if the numerical value of X is too large, so that the numerical range of X is selected from 3-8.

4. When the reset spring fails, the shearing arm cannot reset, the cam pushes the track plate through the track pin shaft to reset the shearing arm, and therefore the track plate is matched with the reset spring to achieve double safety of resetting the shearing arm.

5. The speed reducer adopts a planetary gear speed reducer, and has the functions of reducing the rotating speed and increasing the output torque of a conventional speed reducing mechanism, and the precision is higher.

6. The flat square hole at planet carrier center realizes synchronous rotation through flat square cooperation with the center pin of cam, because the complete shearing action of once of cam rotation round completion promptly, the rotation of planet carrier is synchronous with the cam rotation simultaneously, consequently, rotate round control micro-gap switch disconnection once through planet carrier, be equipped with a recess on the excircle of planet carrier, when the excircle movable contact of protruding portion and planet carrier on the micro-gap switch, micro-gap switch is closed, when the protruding portion card goes into the recess, micro-gap switch disconnection, can the accurate control motor once accomplish the shearing action promptly and shut down immediately.

7. The switch roller is in rolling contact with the outer circle of the planet gear carrier, so that friction and impact between the switch roller and the outer circle of the planet gear carrier are reduced.

These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

[ description of the drawings ]

The utility model is further described with the following drawings:

FIG. 1 is a front view of the screw shearing machine of the present invention;

FIG. 2 is an exploded view of the shear assembly;

fig. 3 is a front side view of the screw shearing machine of the present invention;

FIG. 4 is a schematic view of the cam;

FIG. 5 is a schematic view of the roller;

FIG. 6 is a schematic view of the cam and roller under force;

FIG. 7 is a force diagram of the shear arm;

fig. 8 is a schematic structural view of the screw shearing machine of the present invention;

FIG. 9 is an exploded view of the drive assembly;

FIG. 10 is a first schematic view of the planet carrier and the micro switch;

FIG. 11 is a second schematic view of the planet carrier and the micro switch;

reference numerals: the cutting assembly comprises a cutting assembly 1, a cutting base 11, a rotary supporting hole 111, a shaft hole 112, a screw rod positioning notch 113, a fixed cutter fixing groove 114, a movable cutter positioning surface 115, a cutting arm 12, a swing supporting hole 121, a pin shaft hole 122, a movable cutter fixing groove 123, a first fixing hole 124, a cam 13, a central shaft 131, a track pin shaft 132, a flat square part 133, a roller 14, a roller pin 141, a track plate 15, a rotary hole 151, a track groove 152, a second fixing hole 153, a bolt 16, a nut 161, a limiting flange 162, a return spring 17, a fixed cutter 18 and a movable cutter 19; the driving assembly 2, a fixed machine shell 20, a motor 21, a motor bracket 211, a preceding stage reduction gear set 22, an output sun gear 221, a reduction gear ring 222, a planetary gear box 23, a notch 231, a planetary gear 24, a planetary gear carrier 25, a groove 251 and a flat square hole 252; a microswitch 3 and a switch roller 31.

[ detailed description ] embodiments

The technical solutions of the embodiments of the present invention are explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the embodiment, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.

It will be appreciated by those skilled in the art that features from the examples and embodiments described below may be combined with each other without conflict.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Words such as "upper," "lower," "front," "rear," "inner," "outer," and the like, which indicate orientation or positional relationships, are based only on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the device/element referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; 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 according to specific situations by those of ordinary skill in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1 to 11, the screw shearing machine includes a shearing assembly 1 and a driving assembly 2, where the shearing assembly 1 includes a shearing base 11, a fixed blade 18 fixed to the shearing base 11, a shearing arm 12 hinged to the shearing base 11, a movable blade 19 fixed to the shearing arm 12, a return spring 17 connected to the shearing arm 12, a cam 13 rotatably connected to the shearing base 11, and a roller 14 rotatably connected to the shearing arm 12, and the roller 14 is connected to a pin shaft hole 122 on the shearing arm through a roller pin 141. The driving assembly 2 comprises a motor 21 and a speed reducer, the motor drives the cam 13 to rotate, an output shaft of the motor is connected with an input end of the speed reducer, an output end of the speed reducer is connected with the cam 13, the shearing arm 12 is driven to swing and the movable cutter 19 and the fixed cutter 18 are driven to be matched with a shearing screw rod under the action of a cam surface and the outer circular surface of the roller, the cam surface and the outer circular surface of the roller are matched with a conical surface, and the angle is X degrees.

As one embodiment, as shown in fig. 2, the shear block 11 is provided with a pivot support hole 111 and a shaft hole 112, the shear block 11 is fixed with a bolt 16, and the shear arm 12 is provided with a swing support hole 121 to be connected to the bolt 16. The rear end of the bolt passes through the upper shaft hole 112 of the shear block and is connected with a nut 161, the front end of the bolt is provided with a limit flange 162, the limit flange 162 is positioned on the front side of the shear arm 12, and the front end of the bolt 16 is provided with a shaft head on the front side of the limit flange 162. The cam 13 is provided with a center shaft 131, and the center shaft 131 is rotatably supported by the rotation support hole 111, but a bearing may be added. It will be appreciated that the bolts may be replaced by pins or the like.

According to the technical scheme, the cam makes circular motion around the circle center on the shearing base, the shearing arm swings around the bolt, the roller is arranged on the shearing arm, and the movable cutter and the fixed cutter are driven to shear the screw rod in a matched mode under the action of the cam surface and the outer circular surface of the roller to drive the shearing arm to swing.

As shown in fig. 5 to 7, the cam surface and the outer circular surface of the roller are matched conical surfaces and have an angle X °, so that the force applied to the roller when the cam rotates has an axial component F2 in addition to the force F1 for driving the shearing arm to swing; and because the shearing arm takes the bolt as a supporting point, the shearing arm is provided with a force F3, under the action of the force F3, the shearing arm moves along the axial direction of the bolt, the movable knife moves simultaneously, so that the movable knife and the fixed knife are always pressed on the shearing end surface, when the movable knife and the fixed knife are matched to complete the shearing of the screw rod, a gap is basically reserved between the movable knife and the fixed knife, and burrs of the sheared screw rod caused by the gap between the movable knife and the fixed knife can be avoided.

If the value of X is too small, the axial component force to the roller is too small, the force for driving the movable blade is insufficient, the gap between the fixed blade and the movable blade cannot be reduced well, and if the value of X is too large, the shearing force for driving the movable blade is reduced, so that the value of X is selected to be in the range of 3-8, for example, 5.

Specifically, as shown in fig. 2, a screw positioning notch 113 is formed in an edge of the cutting base 11, a fixed knife fixing groove 114 is formed below the screw positioning notch 113 in the front side of the cutting base, and the fixed knife 18 is fixed to the fixed knife fixing groove 114. The rear side surface of the shearing arm is provided with a movable blade fixing groove 123, the movable blade 19 is fixed on the movable blade fixing groove 123, and the front side surface of the shearing seat is provided with a movable blade positioning surface 115 above the screw positioning notch. The fixed knife fixing groove is used for ensuring the fixed knife mounting position, the movable knife fixing groove is used for ensuring the movable knife mounting position, the movable knife is pressed and attached to the movable knife positioning surface to move towards the fixed knife under the action of force F3, and the relative position of the fixed knife mounting position and the movable knife positioning surface is determined, so that when the movable knife and the fixed knife are matched to complete screw shearing, a gap is basically not formed between the fixed knife mounting position and the movable knife positioning surface.

The return spring 17 is mounted on a housing of the screw shearing machine (not shown in the figure), the return spring 17 may be a torsion spring, a spring mounting pin for mounting the return spring 17 is provided on the housing, one support leg of the return spring is supported on the shearing arm, and the other support leg is supported on the housing. When the movable knife and the fixed knife are matched to complete screw shearing, the cam does not drive the shearing arm any more, and the shearing arm is reset under the action of the reset spring 17.

As shown in fig. 2 and 3, in order to ensure the reliability of the resetting of the shearing arm, a track plate 15 is further provided, a rotation hole 151 and a track groove 152 are provided on the track plate 15, the track plate 15 is rotatably connected to the spindle head through the rotation hole 151, and a track pin 132 matched with the track groove 152 is provided on the cam 13. The track plate 15 and the shearing arm 12 are connected into a whole, a first fixing hole 124 is arranged on the shearing arm 12, a second fixing hole 153 is arranged on the track plate 15, a fixing shaft can be connected between the first fixing hole 124 and the second fixing hole 153, and the track plate is connected with a support leg of a return spring in the embodiment. When the reset spring fails and the shearing arm cannot reset, the cam pushes the track plate through the track pin shaft to reset the shearing arm, so that the track plate is matched with the reset spring, and the two can realize double insurance of resetting the shearing arm.

In the embodiment, the speed reducer is a planetary gear speed reducer, and has the functions of reducing the rotating speed and increasing the output torque of a conventional speed reducing mechanism, and the precision is higher. As shown in fig. 9, the planetary gear reducer includes a front stage reduction gear set 22, a planetary carrier 25, a plurality of planetary gears 24 mounted to the planetary carrier 25, a planetary gear box 23 having an annulus gear, the plurality of planetary gears 24 being engaged with the annulus gear of the planetary gear box 23, the front stage reduction gear set 22 may be provided with a multistage planetary gear reduction mechanism, the front stage reduction gear set being provided with an output sun gear 221 and a reduction annulus gear 222, the output sun gear 221 being engaged with the plurality of planetary gears 23. A flat square hole 252 is provided in the center of the planetary carrier 25, and a flat square portion 133 fitted to the flat square hole 252 is provided in the center shaft 131.

In addition, the motor fixing device is also provided with a fixed machine shell 20, a motor bracket 211 is fixed at the rear part of the fixed machine shell, a convex part is arranged at the front end of the motor bracket 211 and inserted into the inner cavity of the fixed machine shell 20, and screw columns are arranged on the upper side and the lower side of the convex part and fixed with the rear part of the fixed machine shell through screws. An output hole is formed in the center of the motor holder 211, the motor 21 is fixed to the motor holder 211, and the output shaft passes through the output hole. The front reduction gear set 22 is arranged in the fixed casing 20, the rear part of the planetary gear box 23 is arranged in the fixed casing 20, and the front part is fixed with the shearing seat through screws.

After the shearing assembly 1 finishes one shearing action, the motor needs to be stopped in time to replace the screw rod for next shearing. This work is currently done by manually controlling the switch buttons. The shearing action of the movable knife is driven by the cam, so that one complete shearing action can be completed by one rotation of the cam. The direct detection of the rotational stroke of the cam requires installation of a corresponding sensor, so that the cost is high, and the precision is difficult to ensure. Because the cam rotates for one circle and corresponds to the planet carrier to rotate for one circle, the machine can be stopped after one shearing action is controlled and finished through the rotation of the planet carrier.

As shown in fig. 8 to 11, in order to realize the above concept, a microswitch 3 for controlling the motor 21 is further provided, the microswitch 3 is provided on the outer side of the outer circle of the planet carrier, a groove 251 is provided on the outer circle of the planet carrier, the microswitch 3 is provided with a switch elastic sheet, the switch elastic sheet is provided with a protruding portion which is in movable contact with the outer circle of the planet carrier and is clamped into the groove when corresponding to the position of the groove, when the protruding portion is in movable contact with the outer circle of the planet carrier, the switch is closed, and when the protruding portion is clamped into the groove, the switch is opened. It will be appreciated that the projection may be provided with a circular arc surface in movable contact with the outer circumference of the planet carrier.

Further, the protrusion position is provided with a switch roller 31 in rolling contact with the outer circumference of the planet carrier, and the corresponding groove 251 may be a circular groove. The planet gear carrier 23 is provided with a notch 231 corresponding to the installation position of the microswitch, and the opening Guan Gunlun passes through the notch 231 and is movably contacted with the outer circle of the planet gear carrier 25. The switch roller can realize rolling contact with the outer circle of the planet carrier, and friction and impact between the switch roller and the outer circle of the planet carrier are reduced.

The above description is only for the embodiments of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the description in the above embodiments and the accompanying drawings. Any modification which does not depart from the functional and structural principles of the invention is intended to be included within the scope of the claims.

Claims

1. The utility model provides an avoid screw rod cutter of burr, its characterized in that, includes shearing subassembly and drive assembly, shearing subassembly includes shearing seat, is fixed in the stationary knife of shearing seat, articulates in the shearing arm of shearing seat, be fixed in the shearing arm move the sword, with reset spring, the cam of rotating connection in shearing seat, rotate the gyro wheel of connecting in the shearing arm that the shearing arm is connected, drive assembly includes drive cam pivoted motor and reduction gear, through cam surface and the outer disc effect of gyro wheel, drive shearing arm swing, drive move sword and stationary knife cooperation shearing screw rod, the cam surface is X for complex conical surface and angle with the outer disc of gyro wheel for an axial component is given to the gyro wheel when the cam rotates.

2. The screw shear for avoiding the burrs of claim 1, wherein the edge of the shear block is provided with a screw positioning notch, and the front side of the shear block is provided with a fixed blade fixing groove below the screw positioning notch, and the fixed blade is fixed on the fixed blade fixing groove.

3. The screw shear for avoiding the burrs of claim 2, wherein the rear side of the shearing arm is provided with a movable blade fixing groove, the movable blade is fixed on the movable blade fixing groove, and the front side of the shearing base is provided with a movable blade positioning surface above the screw positioning notch.

4. The screw shear for avoiding the burrs of claim 1, wherein the shear block is fixed with a bolt, the rear end of the bolt passes through an upper shaft hole of the shear block and is connected with a nut, the front end of the bolt is provided with a limit flange, and the limit flange is positioned at the front side of the shear arm.

5. A screw shear for avoiding burrs according to claim 4, wherein the shearing module further comprises a track plate connected to the shearing arm, the front end of the bolt is provided with a head at the front side of the limit flange, the track plate is rotatably connected to the head, the track plate is provided with a track groove, and the cam is provided with a track pin shaft which is matched with the track groove to drive the shearing arm to reset.

6. A burr avoiding screw shear according to claim 1, wherein X has a value in the range of 3-8.

7. A burr avoiding screw shear according to claim 1, wherein the speed reducer is a planetary gear speed reducer, the planetary gear speed reducer comprising a front reduction gear set, a planetary carrier, a plurality of planetary gears mounted to the planetary carrier, a planetary gear box having an annulus, the plurality of planetary gears being in meshing engagement with the annulus of the planetary gear box, the front reduction gear set being provided with an output sun gear, the output sun gear being in meshing engagement with the plurality of planetary gears.

8. A burr avoiding screw shear according to claim 7, wherein the planet carrier has a flat square hole in its center, and the cam has a central shaft with a flat square portion engaging the flat square hole.

9. A screw shear for avoiding burrs according to claim 7, further comprising a micro switch for controlling the motor, wherein the micro switch is disposed on the lateral side of the outer circle of the planet carrier, a groove is disposed on the outer circle of the planet carrier, the micro switch is provided with a switch elastic sheet, the switch elastic sheet is provided with a protruding portion which is in movable contact with the outer circle of the planet carrier and is clamped into the groove when corresponding to the position of the groove, when the protruding portion is in movable contact with the outer circle of the planet carrier, the micro switch is closed, and when the protruding portion is clamped into the groove, the micro switch is opened.

10. A burr-avoiding screw shear according to claim 9, wherein said protrusion is provided with a switch roller which is in rolling contact with an outer circumference of the planet carrier.