CN210498559U

CN210498559U - Guide fixing device for fixed-length scissors

Info

Publication number: CN210498559U
Application number: CN201921148313.6U
Authority: CN
Inventors: 周文彦
Original assignee: Wuxi Yibin Machinery Equipment Co Ltd
Current assignee: Wuxi Yibin Machinery Equipment Co Ltd
Priority date: 2019-07-20
Filing date: 2019-07-20
Publication date: 2020-05-12
Anticipated expiration: 2029-07-20

Abstract

The utility model discloses a fixed length is cut and is led fixing device, including the cutter, still include the support that sets up at the cutter discharge gate, can dismantle and rotate a plurality of guide rolls that arrange on the support and along its length direction, rotate the compression roller that sets up on the support and relative with the guide roll and set up on the support and be located the bearing board between two adjacent guide rolls, be equipped with the installation component of fixed compression roller on the support, drive the drive assembly that a plurality of guide rolls rotate in step and drive the lifting unit that the bearing board removed along its direction of height, reserve the direction space that supplies the steel sheet to remove between guide roll and the compression roller, the top wall place straight line of bearing board and the highest summit of guide roll direction are located the same horizontal plane; this fixing device replaces the manpower to fix the derivation to the steel sheet of cutting out, and labour saving and time saving has ensured the shearing efficiency of shaped steel rolling material, has improved output, has reduced manufacturing cost.

Description

Guide fixing device for fixed-length scissors

Technical Field

The utility model relates to a technical field of steel sheet processing, in particular to direction fixing device is cut to scale.

Background

When the steel plate is processed, the steel plate needs to be cut to a fixed length, and the cut steel plate with the fixed length is generally delivered in a straight strip rather than in a coiled manner.

When using the cold shears to carry out the scale shearing to the rolling stock in the present steel rolling production finishing operation district, often can be because of the deformation that the rolling stock tip was stayed when rolling, the nose sticks up, and difficult to see off from the cold shears smoothly, if in transportation process, the steel sheet of cutting out takes place the slope, can influence the ejection of compact of the steel sheet of shearing the completion at the back, and then reduced the shearing efficiency to the steel sheet, so must right through the manual work and just can accomplish the shearing, not only influence the shear rate of scale, restrict the normal production of whole production line, and increase workman's intensity of labour, both influenced production efficiency, waste manpower resources again, be unfavorable for increasing output, manufacturing cost is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a cut to length direction fixing device, its advantage is: this direction fixing device replaces the manpower to fix the derivation to the steel sheet of cutting out, and labour saving and time saving has ensured the shearing efficiency of shaped steel rolling material, has improved output, has reduced manufacturing cost.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a shear-to-length direction fixing device, includes the cutter, still includes the support that sets up at the cutter discharge gate department, can dismantle and rotate on the support and along its length direction a plurality of guide rolls of arranging, rotate the setting on the support and with guide roll relative compression roller and set up on the support and be located the bearing board between two adjacent guide rolls, be equipped with the installation component of fixed compression roller, drive a plurality of guide roll synchronous pivoted drive assembly and drive bearing board along its direction of height's lifting unit on the support, reserve the direction space that supplies the steel sheet to remove between guide roll and the compression roller, the roof of bearing board is located the straight line and is located same horizontal plane with the highest summit of guide roll direction.

According to the technical scheme, the press rolls are fixed on the support by the aid of the mounting assembly, and the guide rolls are detachably arranged on the support, so that the size of a guide space can be adjusted by replacing the press rolls and the guide rolls with different diameters, and steel plates with different thicknesses can be guided and conveyed; secondly, the lifting assembly is utilized to adjust the supporting plate to a proper height, and the supporting plate is matched with steel plates with different thicknesses and sizes, so that the supporting effect is achieved, and the stability of the steel plates in the conveying process is improved; the compression roller is arranged to guide the conveying of the steel plate, so that the steel plate is righted instead of manpower, and time and labor are saved; adopt the fixing device that above-mentioned structure constitutes, fix the derivation to the steel sheet of cutting out, labour saving and time saving has ensured the shearing efficiency of shaped steel rolling material, has improved output, has reduced manufacturing cost.

The utility model discloses further set up to: the support comprises two opposite support beams, a plurality of upright posts and support blocks, wherein the upright posts are respectively arranged on the bottom wall of the support beam and are arranged at equal intervals along the length direction of the support beam, the support blocks are arranged between the opposite side walls of the two rows of upright posts and are in the same direction with the length direction of the support beam, and the length direction of the support beam is in the same direction with the discharge direction of the steel plate.

Through the technical scheme, the combination of the supporting beam, the stand column and the supporting block plays a supporting role in the compression roller and the guide roller, so that the steel plate can be stably transmitted, and the working efficiency is improved.

The utility model discloses further set up to: the roof of a supporting beam is equipped with a plurality of installation pieces along its length direction equipartition, be equipped with the cavity in the installation piece, the installation component is including rotating the dead lever that sets up on the compression roller end wall, setting up the pneumatic clamping jaw in the cavity and setting up the inserted block on two clamp finger relative lateral walls of pneumatic clamping jaw, the dead lever is kept away from and is equipped with on the lateral wall of compression roller and supplies inserted block male slot, the lateral wall of installation piece is equipped with the mounting hole that is linked together with the cavity.

According to the technical scheme, the pneumatic clamping jaw is started, and then the two inserting blocks are close to each other and inserted into the inserting grooves, so that the compression roller can be fixed; the compression roller is rotationally connected with the fixed rod, so that the compression roller rotates in the conveying process of the steel plate, the limiting and guiding effects on the movement of the steel plate are achieved, and the stability of the steel plate in the conveying process is improved; this mounting means, simple structure makes things convenient for the dismouting, and the staff of being convenient for changes the compression roller of different diameter sizes, and then the size in adjustable direction space to lead to the steel sheet of unidimensional, application scope is wide.

The utility model discloses further set up to: drive assembly sets up on two supporting beams deviate from the lateral wall mutually and follow a plurality of gears that its length direction arranged in proper order, with a plurality of gear engagement's transfer chain, drive gear pivoted first motor and set up the connecting rod in a plurality of guide roll terminal wall axle center departments including rotating, the one end and the gear fixed connection of guide roll are kept away from to the connecting rod.

According to the technical scheme, the motor is started, one gear rotates, other gears can be driven to synchronously rotate through the transmission chain, and then the guide rollers rotate, so that the guide conveying of the steel plate is finally realized; this driving method, simple structure, convenient operation has realized the direction transmission to the steel sheet, and then has improved work efficiency.

The utility model discloses further set up to: the lifting assembly comprises two rows of fixed blocks which are oppositely arranged on the supporting block and are arranged along the length direction of the supporting block, two lifting blocks which are oppositely arranged on the bottom wall of the supporting plate, a driving fluted disc, a driven fluted disc meshed with the driving fluted disc, a driving rod penetrating through the eccentric position of the driving fluted disc, a driven rod penetrating through the eccentric position of the driven fluted disc and a second motor driving the driving rod to rotate, lifting grooves for the lifting blocks to move are formed in the top wall of the fixed blocks along the axial direction of the top wall of the fixed blocks, the two ends of the driving rod are rotatably connected with opposite side walls of the guide block, the two ends of the driven rod are rotatably connected with opposite side walls of the two lifting blocks, and the axial directions of the driving rod and the driven rod are the same.

According to the technical scheme, the driving rod is driven to rotate through the second motor, so that the driving fluted disc is driven to rotate, and the driven fluted disc is driven to rotate; because driving lever and driven lever set up respectively in the eccentric department of driving fluted disc and driven fluted disc, and then go up and down along with the rotation oscilaltion of driven fluted disc at the driven lever to drive the elevator and remove in the lift inslot, finally realized the altitude mixture control to the bearing board, so that carry out the bearing to the not unidimensional steel sheet, application scope is wide.

The utility model discloses further set up to: the cell wall of lift groove is equipped with the guide way along the direction of height, the lateral wall of elevator is equipped with the guide block that slides in the guide way.

Through above-mentioned technical scheme, the combination of guide block and guide way plays limiting displacement to the removal of elevator, and then has improved the stability of elevator removal process.

The utility model discloses further set up to: bearing rollers are arranged at two ends, located on the driving fluted disc, of the driving rod, limiting rollers are arranged at two ends, located on the driven fluted disc, of the driven rod, and the limiting rollers are in concave-convex fit with the bearing rollers.

Through above-mentioned technical scheme, spacing roller and the unsmooth cooperation of bearing roller play limiting displacement to the rotation of driven fluted disc, and then have improved the stability that the bearing board reciprocated the in-process.

The utility model discloses further set up to: and the side walls of the driving fluted disc, the driven fluted disc, the bearing roller and the limiting roller are all provided with weight reducing holes.

Through above-mentioned technical scheme, set up and fall heavy hole, alleviateed the weight of driving fluted disc, driven fluted disc, bearing roller and spacing roller for the drive driving lever that the second motor can be stable rotates, and then has improved the stability of bearing board oscilaltion.

To sum up, the utility model discloses following beneficial effect has:

1. firstly, fixing a compression roller on a bracket by using a mounting assembly; secondly, the supporting plate is adjusted to a proper height by utilizing the lifting assembly, and can be adapted to steel plates with different thicknesses and sizes, so that the supporting effect is achieved, and the stability of the steel plates in the conveying process is improved; the compression roller is arranged to guide the steel plate, so that the steel plate is guided in an auxiliary manner instead of manpower, and time and labor are saved; the fixing device formed by the structure ensures the shearing efficiency of the section steel rolled stock, improves the yield and reduces the production cost;

2. the pressing roller is fixed by moving the pneumatic clamping jaw, so that the two inserting blocks are close to each other and inserted into the inserting grooves, the pressing roller rotates in the conveying process of the steel plate, the limiting and guiding effects on the movement of the steel plate are achieved, and the stability of the steel plate in the conveying process is improved; the installation mode has a simple structure, is convenient to disassemble and assemble, is convenient for workers to replace compression rollers with different diameters, can further adjust the size of the guide space so as to guide steel plates with different sizes, and has a wide application range;

3. the pneumatic second motor drives the driving fluted disc to rotate so as to drive the driven fluted disc to rotate; because driving lever and driven lever set up respectively in the eccentric department of driving fluted disc and driven fluted disc, and then go up and down along with the rotation oscilaltion of driven fluted disc at the driven lever to drive the elevator and remove in the lift inslot, finally realized the altitude mixture control to the bearing board, so that carry out the bearing to the not unidimensional steel sheet, application scope is wide.

Drawings

Fig. 1 is a schematic view of the overall structure of the present embodiment.

Fig. 2 is a structural diagram for showing the positional relationship between the driving components and the brackets.

Fig. 3 is a schematic structural view for embodying the mounting assembly.

Fig. 4 is a schematic structural view for embodying the lifting assembly.

Reference numerals: 1. a shearing machine; 2. a support; 21. a support beam; 22. a column; 23. a support block; 3. a guide roller; 4. a compression roller; 5. a support plate; 6. mounting the component; 61. fixing the rod; 62. a pneumatic clamping jaw; 63. inserting a block; 7. a drive assembly; 71. a gear; 72. a conveyor chain; 73. a first motor; 74. a connecting rod; 8. a lifting assembly; 81. a fixed block; 82. a lifting block; 83. a driving fluted disc; 84. a driven fluted disc; 85. a driving lever; 86. a driven lever; 87. a second motor; 9. a guide space; 10. mounting blocks; 11. a slot; 12. a lifting groove; 13. a guide groove; 14. a guide block; 15. a carrying roller; 16. a limiting roller; 17. reducing the weight of the hole; 18. a cavity; 19. and (7) installing holes.

Detailed Description

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

Example (b):

a guide fixing device for a shear with a fixed length, referring to fig. 1, comprises a shear 1 body.

Referring to fig. 2, a support 2 is arranged at a discharge port of the shearing machine 1, the support 2 includes two support beams 21 arranged oppositely, the length direction of the support beam 21 is the same direction as the discharge direction of the steel plate, a plurality of upright posts 22 are arranged at equal intervals along the length direction of the bottom walls of the two support beams 21, two rows of upright posts 22 are combined, support blocks 23 are arranged in the middle of opposite side walls of the two rows of upright posts 22, and the axial direction of the support blocks 23 is the same direction as the axial direction of the support beams 21.

Referring to fig. 1 and 2, a plurality of guide rollers 3 are arranged between opposite side walls of two support beams 21 at equal intervals along the length direction of the support beams, the guide rollers 3 are detachably arranged on the support beams 21, a plurality of mounting blocks 10 are uniformly distributed on top walls of the two support beams 21 along the length direction of the support beams, the mounting blocks 10 are combined into two rows, a press roller 4 is arranged between the two mounting blocks 10 opposite along the width direction of a support block 23, a guide space 9 for moving a steel plate is reserved between the guide rollers 3 and the press roller 4, a support plate 5 for supporting the steel plate is arranged between the two adjacent guide rollers 3 on the support block 23, a straight line on which the upper surface of the support plate 5 is positioned and vertexes of the rolling direction of the plurality of guide rollers 3 are positioned on the same horizontal plane, a mounting assembly 6 for fixing the press roller 4 is arranged on the mounting block 10, and a driving assembly 7 for driving, the supporting block 23 is provided with a lifting component 8 for driving the supporting plate 5 to move along the height direction of the upright post 22; the bearing plate 5 has a bearing effect on the steel plate due to the long length of the steel plate; meanwhile, the compression roller 4 is arranged to limit the movement of the steel plate, so that the stability of the steel plate in the conveying process is improved; then, the guide roller 3 is detachably arranged on the support beam 21, so that workers can conveniently replace the guide roller 3 with different diameters, the installation assembly 6 can replace the compression roller 4 with different diameters, and the size of the guide space 9 can be adjusted through the matching of the compression roller 4 and the guide roller 3, so that steel plates with different thicknesses can be conveyed, and the application range is wide; meanwhile, the lifting component 8 is utilized to adjust the height of the bearing plate 5 so as to convey steel plates with different thickness and size; finally, the guide roller 3 is driven to rotate by the driving assembly 7, and the sheared steel plate can be guided and fixed; adopt the fixing device that above-mentioned structure constitutes, carry out fixed direction to the steel sheet of cutting out, replace the manpower direction, labour saving and time saving has guaranteed the shearing efficiency to the shaped steel rolling material, has improved output, has reduced manufacturing cost.

Referring to fig. 2, the driving assembly 7 includes a plurality of gears 71 rotatably disposed on the side wall of one of the supporting beams 21 and sequentially arranged along the length direction thereof, a transmission chain 72 for driving the plurality of gears 71 to rotate synchronously, connecting rods 74 fixed at the axial centers of the two end walls of the plurality of guide rollers 3, and first motors 73 disposed on the opposite side walls of the two supporting beams 21, wherein one ends of the connecting rods 74 far away from the guide rollers 3 are fixedly connected with the axial centers of the gears 71, the side walls of the supporting beams 21 are provided with support plates (not shown) extending outwards, the first motors 73 are fixed on the support plates (not shown), the driving shafts of the first motors 73 are fixedly connected with one of the connecting rods 74, and the other connecting rods 74 are respectively rotatably connected with the side walls of; when the steel plate is conveyed, the first motor 73 is started, one gear 71 rotates, and then other gears 71 are driven to synchronously rotate, so that the guide rollers 3 are driven to rotate, and finally the steel plate conveying process is guided.

Referring to fig. 1 and 3, a cavity 18 is formed in the mounting block 10, the mounting assembly 6 includes a fixing rod 61 rotatably disposed at the axle centers of the two end walls of the press roller 4, a pneumatic clamping jaw 62 disposed in the cavity 18, and an insertion block 63 disposed on the opposite side walls of two clamping fingers of the pneumatic clamping jaw 62, the side wall of the fixing rod 61 far away from the press roller 4 is provided with an insertion slot 11 for inserting the insertion block 63, the side wall of the mounting block 10 is provided with a mounting hole 19 connected with the cavity 18, and the mounting hole 19 penetrates through the top wall and the side wall of the mounting block 10; during installation, the compression roller 4 is placed between the two installation blocks 10, the fixing rod 61 penetrates through the installation hole 19 and extends into the cavity 18, then the pneumatic clamping jaw 62 is started, the two insertion blocks 63 are close to each other and inserted into the insertion slot 11, and therefore the compression roller 4 can be fixed; the compression roller 4 is rotatably connected with the fixed rod 61, so that the compression roller 4 rotates in the steel plate conveying process, the movement of the steel plate is limited and guided, and the stability of the steel plate in the conveying process is improved; the installation mode that adopts above-mentioned structure to constitute, simple structure makes things convenient for the dismouting, and the staff of being convenient for changes the compression roller 4 of different diameter sizes, and then the size of adjustable direction space 9 to lead to the steel sheet of different sizes, application scope is wide.

Referring to fig. 1 and 4, the lifting assembly 8 includes two rows of fixed blocks 81 oppositely disposed on the supporting block 23 and sequentially arranged along the length direction thereof, two lifting blocks 82 oppositely disposed on the bottom wall of the supporting plate 5, a driving toothed disc 83, a driven toothed disc 84 engaged with the driving toothed disc 83, a driving rod 85 penetrating the eccentric position of the driving toothed disc 83, a driven rod 86 penetrating the eccentric position of the driven toothed disc 84, and a second motor 87 driving the driving rod 85 to rotate, wherein the top wall of the fixed blocks 81 is provided with the lifting grooves 12 along the axial direction thereof for the lifting blocks 82 to move, two ends of the driving rod 85 are rotatably connected with opposite side walls of the fixed blocks 81, two ends of the driven rod 86 are rotatably connected with opposite side walls of the two lifting blocks 82, and the axial directions of the driving rod 85 and the driven rod 86 are in the same direction as the width direction of the supporting block 23; when the height of the supporting plate 5 needs to be adjusted, the second motor 87 is started, the driving rod 85 rotates to drive the driving fluted disc 83 to rotate, and further drive the driven fluted disc 84 to rotate; because the driving rod 85 and the driven rod 86 are respectively arranged at the eccentric positions of the driving fluted disc 83 and the driven fluted disc 84, and then the driven rod 86 ascends and descends along with the rotation of the driven fluted disc 84, so that the lifting block 82 is driven to move in the lifting groove 12, and finally the height adjustment of the supporting plate 5 is realized, so that steel plates with different sizes can be supported, and the application range is wide.

Referring to fig. 4, two groove walls of the lifting groove 12 adjacent to the groove opening are provided with guide grooves 13 along the height direction, and the side wall of the lifting block 82 is provided with a guide block 14 sliding in the guide grooves 13; the cooperation of guide way 13 and guide block 14 plays the limiting displacement to elevator block 82, and then has improved the stability of bearing board 5 lift in-process.

Referring to fig. 4, bearing rollers 15 are arranged at two ends of a driving rod 85, which are located on a driving fluted disc 83, the driving rod 85 sequentially penetrates through the eccentric positions of the two bearing rollers 15, limiting rollers 16 are arranged at two ends of a driven rod 86, which is located on a driven fluted disc 84, the driven rod 86 sequentially penetrates through the eccentric positions of the two limiting rollers 16, and the bearing rollers 15 and the limiting rollers 16 are in concave-convex fit; the cooperation of the limiting roller 16 and the bearing roller 15 has a limiting effect on the rotation of the driven fluted disc 84, so that the stability of the bearing plate 5 in the up-and-down moving process is improved.

Referring to fig. 4, the side walls of the driving fluted disc 83, the driven fluted disc 84, the supporting roller 15 and the limiting roller 16 are all provided with weight reducing holes 17; the weight of the driving fluted disc 83, the driven fluted disc 84, the bearing roller 15 and the limiting roller 16 is respectively reduced by the weight reducing holes 17, so that the driving rod 85 can be stably driven by the second motor 87 to rotate, and the up-and-down lifting stability of the bearing plate 5 is further improved.

Referring to fig. 4, the side walls of the supporting plate 5 in the same direction as the material conveying direction are both downward inclined arc surfaces, which play a role in guiding the conveying of the steel plate.

The working process is as follows: firstly, the pneumatic clamping jaw 62 is started, so that the two inserting blocks 63 are inserted into the slot 11, and then the fixing rod 61 can be fixed, and the fixing of the compression roller 4 is realized; then, the second motor 87 is started, the driving rod 85 rotates to drive the driving fluted disc 83 to rotate, and further the driven fluted disc 84 rotates, so that the lifting block 82 is driven to move up and down along the length direction of the lifting groove 12, and the supporting plate 5 can be adjusted to a proper height; and finally, the first motor 73 is started to drive the gear 71 to rotate, and the other gears 71 are driven to rotate through the transmission chain 72, so that the guide rollers 3 are driven to rotate, the steel plate is finally conveyed, the compression rollers 4 and the guide rollers 3 are arranged, the guide limiting effect is realized on the conveying of the steel plate, and the stability in the steel plate conveying process is improved.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The utility model provides a shear-to-length direction fixing device, includes cutter (1), its characterized in that: also comprises a bracket (2) arranged at the discharge port of the shearing machine (1), a plurality of guide rollers (3) which are detachably rotated on the bracket (2) and are arranged along the length direction of the bracket, a press roller (4) which is rotatably arranged on the bracket (2) and is opposite to the guide rollers (3), and a bearing plate (5) which is arranged on the bracket (2) and is positioned between two adjacent guide rollers (3), the bracket (2) is provided with a mounting component (6) for fixing the compression roller (4), a driving component (7) for driving the guide rollers (3) to synchronously rotate and a lifting component (8) for driving the bearing plate (5) to move along the height direction of the bearing plate, a guide space (9) for the steel plate to move is reserved between the guide roller (3) and the press roller (4), the straight line of the top wall of the bearing plate (5) and the highest vertex of the rolling direction of the guide roller (3) are positioned on the same horizontal plane.

2. A shear guide fixture according to claim 1, in which: the support (2) comprises two support beams (21) which are arranged oppositely, a plurality of upright posts (22) which are respectively arranged on the bottom wall of the support beams (21) and are arranged at equal intervals along the length direction of the support beams, and supporting blocks (23) which are arranged between the opposite side walls of the two rows of upright posts (22) and are in the same direction with the length direction of the support beams (21), wherein the length direction of the support beams (21) is in the same direction with the discharging direction of the steel plates.

3. A shear guide fixture according to claim 2, in which: the roof of a supporting beam (21) is equipped with a plurality of installation pieces (10) along its length direction equipartition, be equipped with cavity (18) in installation piece (10), installation component (6) including rotate set up dead lever (61) on compression roller (4) end wall, set up pneumatic clamping jaw (62) in cavity (18) and set up inserted block (63) on two clamp finger opposite side walls of pneumatic clamping jaw (62), be equipped with on the lateral wall that compression roller (4) was kept away from in dead lever (61) and supply inserted block (63) male slot (11), the lateral wall of installation piece (10) is equipped with mounting hole (19) that are linked together with cavity (18).

4. A shear guide fixture according to claim 2, in which: drive assembly (7) including rotate set up on two supporting beam (21) lateral wall back to the side wall and along a plurality of gears (71) that its length direction arranged in proper order, with conveying chain (72) of a plurality of gears (71) meshing, drive gear (71) pivoted first motor (73) and set up connecting rod (74) in a plurality of guide roll (3) end wall axle center department, the one end and gear (71) fixed connection of guide roll (3) are kept away from in connecting rod (74).

5. A shear guide fixture according to claim 2, in which: the lifting component (8) comprises two rows of fixed blocks (81) which are oppositely arranged on the supporting block (23) and are arranged along the length direction of the supporting block, two lifting blocks (82) which are oppositely arranged on the bottom wall of the supporting plate (5), a driving fluted disc (83), a driven fluted disc (84) which is meshed with the driving fluted disc (83), a driving rod (85) which is arranged at the eccentric position of the driving fluted disc (83) in a penetrating way, a driven rod (86) which is arranged at the eccentric position of the driven fluted disc (84) in a penetrating way and a second motor (87) which drives the driving rod (85) to rotate, the top wall of the fixed block (81) is provided with a lifting groove (12) for the lifting block (82) to move along the axial direction, two ends of the active rod (85) are rotationally connected with the opposite side walls of the fixed block (81), the two ends of the driven rod (86) are rotatably connected with the opposite side walls of the two lifting blocks (82), the axial directions of the driving rod (85) and the driven rod (86) are the same as the width direction of the supporting block (23).

6. A shear guide fixture according to claim 5, in which: the groove wall of the lifting groove (12) is provided with a guide groove (13) along the height direction, and the side wall of the lifting block (82) is provided with a guide block (14) which slides in the guide groove (13).

7. A shear guide fixture according to claim 5, in which: bearing rollers (15) are arranged at two ends, located on the driving fluted disc (83), of the driving rod (85), limiting rollers (16) are arranged at two ends, located on the driven fluted disc (84), of the driven rod (86), and the limiting rollers (16) are in concave-convex fit with the bearing rollers (15).

8. A shear guide fixture according to claim 5, in which: and the side walls of the driving fluted disc (83), the driven fluted disc (84), the bearing roller (15) and the limiting roller (16) are provided with weight reducing holes (17).