CN211388496U

CN211388496U - Pre-clamping device of H-shaped steel assembling machine

Info

Publication number: CN211388496U
Application number: CN201922156039.3U
Authority: CN
Inventors: 周磊; 周国平; 周俊; 陶江涛
Original assignee: Wuhan Qiujing Steel Structure Co ltd
Current assignee: Wuhan Qiujing Steel Structure Co ltd
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2020-09-01
Anticipated expiration: 2029-12-04

Abstract

The utility model relates to a clamping device in advance of H shaped steel assemblage machine, which comprises a frame, be provided with transport mechanism and a plurality of positioning mechanism of branch row frame width direction both sides in the frame, positioning mechanism includes the pneumatic cylinder that horizontal rigid coupling set up at frame up end and along frame width direction, the rigid coupling has the locating lever on the piston rod of pneumatic cylinder, the vertical rotation of tip that the pneumatic cylinder was kept away from to the locating lever is connected with the tight wheel of supporting, locating lever one side horizontal rigid coupling has the clamping bar, the one end lift that the locating lever was kept away from to the clamping bar is provided with the clamping piece of two "L" types, the clamping piece is used for supporting tightly and pressing from both sides the avris of two pterygoid laminas, two clamping pieces are synchronous opposite. The utility model discloses a clamping piece of two "L" types on the tight wheel of support on the locating lever and the clamping bar supports tight location on web lateral wall and pterygoid lamina respectively/the lateral wall to only through a pneumatic cylinder control, make positioning mechanism simple structure error little.

Description

Pre-clamping device of H-shaped steel assembling machine

Technical Field

The utility model belongs to the technical field of profile steel production auxiliary assembly's technique and specifically relates to a clamping device in advance of H shaped steel assemblage machine is related to.

Background

The H-shaped steel is also called I-shaped steel and is generally manufactured by a welding method and a rolling method, wherein the welding method is to cut strip steel with proper thickness into proper width, then weld the edge part and the waist part together on a continuous welding machine set, so that various H-shaped steel end faces which are difficult to roll can be produced, the production operation is flexible, and the H-shaped steel is suitable for small-batch and various market demands. When producing H shaped steel through the welding method, need use H shaped steel assemblage machine to carry out accurate location to pterygoid lamina, web, it can to carry out the double-wire welding to the connecting portion of pterygoid lamina and web again.

The current chinese patent that patent publication number is CN107553133A, a modified H shaped steel assemblage machine is proposed, which comprises a supporting table, be equipped with U type frame in the middle of the upper surface of brace table, one side that two vertical poles of U type frame are relative all is equipped with the slip pillar, be equipped with sliding connection's horizontal guiding arm between two slip pillars, the both ends of horizontal guiding arm are equipped with the slip recess that corresponds with the slip pillar, can compress tightly the pterygoid lamina of H shaped steel top through the kicking wheel, can drive stationary platen through first hydraulic telescoping rod and reciprocate, can be fixed with the pterygoid lamina of H shaped steel top through stationary platen, it is fixed more convenient to make, can drive vertical guide pulley back-and-forth movement through second hydraulic telescoping rod, can be fixed with the web of H shaped steel through vertical guide pulley. The utility model discloses a simple structure for it is more convenient to fix H shaped steel, and can adjust the position of the web of H shaped steel, it is more convenient to use.

The above prior art solutions have the following drawbacks: when pterygoid lamina and web are fixed simultaneously, need just can guarantee the accurate location of pterygoid lamina and web under the accurate cooperation of first hydraulic telescoping rod and second hydraulic telescoping rod, and H shaped steel all is continuous production basically, for guaranteeing production efficiency and production quality, need carry out the precompression to pterygoid lamina and web assembled usually, if adopt above-mentioned technical scheme, need dispose first hydraulic telescoping rod and the second hydraulic telescoping rod of a certain amount, make equipment comparatively complicated undoubtedly, the cost is higher.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a clamping device in advance of H shaped steel assemblage machine, it has simple structure, assembles the advantage of background to exist not enough to prior art.

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

a pre-clamping device of an H-shaped steel assembling machine comprises a rectangular frame, wherein a conveying mechanism and a plurality of positioning mechanisms which are arranged on two sides of the frame in the width direction in a split mode are arranged on the frame;

the conveying mechanism comprises a plurality of conveying rollers which are rotatably connected to the upper end face of the rack and are distributed along the width direction of the rack at equal intervals along the length direction of the rack, and a driving assembly for driving the plurality of conveying rollers to rotate is arranged on the rack;

positioning mechanism sets up between two adjacent transfer rollers, positioning mechanism includes horizontal rigid coupling and is in the frame up end just follows the pneumatic cylinder that frame width direction set up, the rigid coupling has the locating lever on the piston rod of pneumatic cylinder, the locating lever is kept away from the vertical rotation of tip of pneumatic cylinder is connected with and supports the tight wheel, the horizontal rigid coupling in locating lever one side has the clamping lever, the clamping lever is kept away from the one end lift of locating lever is provided with the clamping piece of two "L" types, the clamping piece is used for supporting tightly and pressing from both sides tightly the avris of two pterygoid laminas, two the clamping piece is in the vertical direction and is synchronous motion in opposite directions/dorsad.

By adopting the technical scheme, the two wing plates and the web plate are assembled and placed on the frame, the hydraulic cylinder is started, when the hydraulic cylinder is started, the piston rod of the hydraulic cylinder is driven to drive the positioning rod to approach towards the direction close to the web plate, so that the abutting wheels at the two sides of the frame clamp and position the web plate, the upper ends and the side walls at the two sides of the upper wing plate and the lower wing plate are pressed and abutted by the clamping pieces at the two sides of the frame, the driving assembly drives the plurality of conveying rollers to rotate to convey the wing plate positioned below, so that the web plate and the two wing plates can be pre-pressed and positioned before being completely assembled and spliced, the assembly precision of the wing plates and the web plate is ensured, the web plate and the wing plate at the feeding port are prevented from being tilted and deviated as far as possible, and the synchronous clamping and positioning of the pre-clamping device to the wing plates, the structure is simple and the error is small; simultaneously, the abutting wheel can move in the width direction of the frame, and the clamping piece can ascend and descend in the vertical direction, so that the pre-clamping device is more convenient to operate when applied to the H-shaped steel with different sizes.

The present invention may be further configured in a preferred embodiment as: the clamping piece comprises an L-shaped clamping plate, a pressing wheel along the length direction of the horizontal section is rotatably connected to the lower end face of the horizontal section of the clamping plate, and a clamping wheel is vertically and rotatably connected to one side, deviating from the hydraulic cylinder, of the vertical section of the clamping plate.

Through adopting above-mentioned technical scheme, terminal surface and side inside wall rotate respectively under the splint and connect pinch roller and make the clamping piece when pressing from both sides the pterygoid lamina in advance, are unlikely to influence the normal transmission of pterygoid lamina and web to pterygoid lamina and web emergence dislocation.

The present invention may be further configured in a preferred embodiment as: the clamping rod is kept away from the end part horizontal sliding of the positioning rod is provided with an adjusting screw rod, the adjusting screw rod and the clamping rod are orthogonally arranged, two clamping pieces are arranged at one ends of the hydraulic cylinders, far away from the adjusting screw rod, the clamping rod is close to the end part horizontal fixedly connected with the adjusting cylinder, matched with the adjusting screw rod in a splicing mode, and the adjusting screw rod is connected with adjusting nuts through threads on the outer peripheral walls of two ends of the adjusting cylinder.

Through adopting above-mentioned technical scheme, two adjusting nut are rotatory to remove adjusting screw in adjusting a section of thick bamboo, two adjusting nut of rethread fix adjusting screw bolt on adjusting a section of thick bamboo, the interval between steerable homonymy's the tight wheel of support and the tight wheel of clamp has realized that two clamping pieces press from both sides tightly to the convenient clamp of different width pterygoid laminas in same positioning mechanism.

The present invention may be further configured in a preferred embodiment as: adjust a section of thick bamboo periphery wall and run through and set up along its axial viewing aperture, adjusting screw is close to one side of even number viewing aperture and is provided with along its axial scale mark, it is close to adjust a section of thick bamboo the periphery wall of viewing aperture is provided with the sensing the instruction arrow point of scale mark.

Through adopting above-mentioned technical scheme, when operating personnel adjusted the interval between tight wheel and the pinch roller according to pterygoid lamina width, the accessible was observed the instruction arrow on adjusting the section of thick bamboo and is aimed at adjusting screw's scale and ensure that the interval between tight wheel and the pinch roller in a plurality of positioning mechanism is equal as far as possible to reduce the positioning error to the pterygoid lamina in the different positioning mechanism.

The present invention may be further configured in a preferred embodiment as: adjusting screw keeps away from the vertical rigid coupling of one end of clamping lever has a location section of thick bamboo, a location section of thick bamboo internal rotation is connected with double threaded rod, the helicla flute pitch at double threaded rod both ends is the same and spiral opposite direction, the equal threaded connection in double threaded rod both ends has the slider, the vertical section rigid coupling of splint is in the slider is kept away from adjusting screw's one side just two at double threaded rod both ends the vertical section of splint is and sets up in opposite directions, it has two to run through to go back vertical rigid coupling on the section of thick bamboo location the gag lever post of slider.

Through adopting above-mentioned technical scheme, rotatory double threaded rod, the gag lever post restricts the direction of motion of slider for double threaded rod drives two sliders and is synchronous the motion of being close to or keeping away from along double threaded rod's axial when rotatory, and then drives two splint and is synchronous the motion of being close to or keeping away from, has realized that the pinch roller on two splint carries out the convenient operation that compresses tightly steadily to two pterygoid laminas.

The present invention may be further configured in a preferred embodiment as: the tip rigid coupling of double-end threaded rod has the hand wheel, the tip rigid coupling of gag lever post has the stopper.

Through adopting above-mentioned technical scheme, set up the convenient adjustment of the interval between two splint of being convenient for of hand wheel, the stopper is injectd the displacement of splint to the double threaded rod that deviates from of slider causes the clamping piece to drop.

The present invention may be further configured in a preferred embodiment as: and a reinforcing piece is arranged between the positioning rod and the clamping rod.

Through adopting above-mentioned technical scheme, the reinforcement piece can strengthen the structural strength between locating lever and the clamping bar, has avoided the clamping piece to support tightly behind the pterygoid lamina lateral wall for a long time as far as possible, and the clamping bar bears great reaction force and takes place structural deformation, causes the clamping piece not accurate to pterygoid lamina clamp positioning effect.

The present invention may be further configured in a preferred embodiment as: drive assembly includes the rigid coupling and is in the sprocket of transfer roller tip, it is a plurality of the common meshing of sprocket periphery wall is connected with the chain, the rigid coupling has in the frame and is used for driving one of them the rotatory motor of sprocket.

Through adopting above-mentioned technical scheme, starter motor, its output of motor drive is rotatory and drive the sprocket rotation of its rigid coupling when starting, and this sprocket drives a plurality of sprocket synchronous rotations under the drive effect of chain to make a plurality of transfer roller synchronous rotations, carry with stabilizing the pterygoid lamina.

To sum up, the utility model discloses a following at least one useful technological effect:

1. according to the width of a wing plate in the H-shaped steel to be processed, the clamping piece is adjusted to a proper position on the positioning rod, hydraulic cylinders on two sides of the rack are started simultaneously, the hydraulic cylinders drive the positioning rod to approach the H-shaped steel to be processed, the H-shaped steel to be processed can be clamped and positioned on the rack, pre-clamping of the wing plate and the web plate in the H-shaped steel to be processed is facilitated, synchronous clamping and positioning of the wing plate and the web plate by the pre-clamping device can be achieved by only one hydraulic cylinder, the structure is simple, and errors are small;

2. the lower end surface and the inner side wall of the side edge of each clamping plate are provided with the pressing wheel and the clamping wheel, and the two clamping plates are controlled to synchronously lift through the double-head threaded rod, so that the clamping and abutting positioning of the clamping piece on the upper wing plate and the lower wing plate are quicker, and the operation is simpler;

3. the adjusting screw is provided with scales and the adjusting cylinder is provided with an observation port, so that an operator can ensure that the distances between the abutting wheels and the clamping wheels in the positioning mechanisms are equal as much as possible, and the positioning errors of wing plates in different positioning mechanisms are reduced.

Drawings

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

Fig. 2 is a schematic structural diagram of the positioning mechanism of the present invention.

Fig. 3 is a partially enlarged schematic view of a portion a in fig. 2.

Reference numerals: 1. a frame; 2. a conveying roller; 3. a hydraulic cylinder; 4. positioning a rod; 5. a tightening wheel; 6. a clamping lever; 7. a clamping member; 8. a splint; 9. a pinch roller; 10. a pinch wheel; 11. adjusting the screw rod; 12. an adjusting cylinder; 13. adjusting the nut; 14. a viewing port; 15. scale lines; 16. an arrow is indicated; 17. a positioning cylinder; 18. a double-headed threaded rod; 19. a slider; 20. a limiting rod; 21. a hand wheel; 22. a limiting block; 23. a reinforcement member; 24. a sprocket; 25. a chain; 26. an electric motor.

Detailed Description

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

Referring to fig. 1 and 2, for the pre-clamping device of the H-shaped steel assembling machine disclosed by the invention, the pre-clamping device comprises a rectangular frame-shaped frame 1, a conveying mechanism and a plurality of positioning mechanisms arranged on both sides of the width direction of the frame 1 in a row are arranged on the frame 1, the positioning mechanisms are arranged on the same side, the conveying mechanism comprises a plurality of conveying rollers 2 which are rotatably connected on the upper end surface of the frame 1 and are arranged along the width direction of the frame, the conveying rollers 2 are distributed at equal intervals along the length direction of the frame 1, and a driving assembly for driving the conveying rollers 2 to rotate synchronously is arranged on the frame 1; the positioning mechanism is arranged between two adjacent conveying rollers 2, the positioning mechanism comprises a hydraulic cylinder 3 which is horizontally and fixedly connected to the upper end face of the rack 1 and is arranged along the width direction of the rack 1, a positioning rod 4 along the axial direction of the hydraulic cylinder 3 is fixedly connected to a piston rod of the hydraulic cylinder 3, the end part, far away from the hydraulic cylinder 3, of the positioning rod 4 is vertically and rotatably connected with a resisting wheel 5, in the embodiment, the resisting wheel 5 is preferably two and is divided into two sides in the vertical direction of the positioning rod 4, one side, along the length direction of the rack 1, of the positioning rod 4 is horizontally and fixedly connected with a clamping rod 6 (shown in figure 3) which is orthogonal to the positioning rod 4, a reinforcing part 23 is arranged between the positioning rod 4 and the clamping rod 6; the one end lift that locating lever 4 was kept away from to clamp bar 6 is provided with clamping piece 7 of two "L" types, clamping piece 7 is used for supporting tightly and pressing from both sides tightly to the avris of two pterygoid laminas, two clamping piece 7 are synchronous opposite/dorsad motion in vertical direction, clamping piece 7 includes splint 8 of "L" type, the lower terminal surface of splint 8 horizontal segment rotates and is connected with pinch roller 9 along this horizontal segment length direction, the vertical rotation in one side that the vertical section of splint 8 deviates from pneumatic cylinder 3 is connected with pinch roller 10, the vertical section of two splint 8 in the same positioning mechanism is relative setting.

Two wing plates and a web plate are assembled into H-shaped steel and are placed on a plurality of conveying rollers 2 on a frame 1, clamping plates 8 on a plurality of clamping rods 6 are adjusted to proper positions according to the width of the wing plate in the H-shaped steel to be processed, a hydraulic cylinder 3 is started, when the hydraulic cylinder 3 is started, a piston rod of the hydraulic cylinder is driven to drive positioning rods 4 to approach towards the direction close to the web plate, pressing wheels 5 on the positioning rods 4 at two sides of the frame 1 are used for clamping and positioning the web plate, then pressing wheels 9 and clamping wheels 10 on the clamping plates 8 at two sides of the frame 1 are used for pressing and clamping the upper end and the side wall at two sides of the upper wing plate and the lower wing plate, a plurality of conveying rollers 2 are driven to rotate through a driving assembly to convey the wing plate below, so that the web plate and the two wing plates can be pre-pressed and positioned before the complete assembly and splicing, the assembly precision of the, the web and the wing plate at the feeding port are tilted and deviated, synchronous clamping and positioning of the wing plate and the web by the pre-clamping device can be realized only by one hydraulic cylinder 3, and the structure is simple and the error is small.

The abutting wheel 5 can move in the width direction of the rack 1, and the clamping plate 8 in the same positioning mechanism can ascend and descend in the vertical direction, so that the pre-clamping device is more convenient to operate when applied to H-shaped steel with different sizes; terminal surface and side inside wall rotate respectively under splint 8 and connect pinch roller 9 and pinch roller 10 and make clamping piece 7 when pressing from both sides the pterygoid lamina in advance, be unlikely to influence the normal transmission of pterygoid lamina and web, in order to avoid pterygoid lamina and web to take place the dislocation, it can strengthen locating lever 4 and the holistic structural strength of pinch bar 6 to set up reinforcement piece 23 between locating lever 4 and the pinch bar 6, avoided pinch roller 10 to support tightly behind the pterygoid lamina lateral wall for a long time as far as, pinch bar 6 bears great reaction force and takes place structural deformation, cause clamping piece 7 to press from both sides tight positioning action inaccurate to the pterygoid lamina.

Referring to fig. 2 and 3, an adjusting cylinder 12 is horizontally and fixedly connected to the end portion, away from the positioning rod 4, of the clamping rod 6, the axis of the adjusting cylinder 12 is orthogonal to the clamping rod 6, an adjusting screw rod 11 penetrates through the adjusting cylinder 12 in a sliding manner, adjusting nuts 13 are respectively in threaded connection with the adjusting screw rod 11 on the outer peripheral walls of the two ends of the adjusting cylinder 12, and the two clamping members 7 are arranged at one end, away from the hydraulic cylinder 3, of the adjusting screw rod 11; the peripheral wall of the adjusting cylinder 12 is penetrated and provided with an observation port 14 along the axial direction, one side of the adjusting screw 11 close to the even observation port 14 is provided with a scale mark 15 along the axial direction, and the peripheral wall of the adjusting cylinder 12 close to the observation port 14 is provided with an indicating arrow 16 pointing to the scale mark 15.

When an operator adjusts the distance between the tightening wheel 5 and the clamping wheel 10 according to the width of the wing plate, the two adjusting nuts 13 are rotated, the adjusting screw rod 11 is moved in the adjusting cylinder 12, and the adjusting screw rod 11 is bolted and fixed on the adjusting cylinder 12 through the two adjusting nuts 13, so that the distance between the tightening wheel 5 and the clamping wheel 10 on the same side can be controlled, and the two clamping pieces 7 in the same positioning mechanism can conveniently clamp the wing plates with different widths; meanwhile, when the plurality of positioning mechanisms are calibrated, the indication arrow 16 on the adjusting cylinder 12 is observed to align with the scale of the adjusting screw 11, so that the distance between the abutting wheel 5 and the clamping wheel 10 in the plurality of positioning mechanisms is ensured to be as equal as possible, and the positioning error of wing plates in different positioning mechanisms is reduced.

Referring to fig. 2, the vertical rigid coupling of one end that tight pole 6 was kept away from to adjusting screw 11 has a location section of thick bamboo 17, location section of thick bamboo 17 internal rotation is connected with double threaded rod 18, the spiral groove pitch at double threaded rod 18 both ends is the same and spiral opposite direction, the equal threaded connection in double threaded rod 18 both ends has slider 19, the one side that adjusting screw 11 was kept away from at slider 19 to the vertical section rigid coupling of splint 8, it has gag lever post 20 that runs through two sliders 19 to go back vertical rigid coupling on the lateral wall of a location section of thick bamboo 17, the coaxial rigid coupling of upper end of double threaded rod 18 has hand wheel 21, the upper end rigid coupling.

When wing plates on webs with different sizes are clamped and positioned, an adjusting screw rod 11 is fixed at a proper position on an adjusting cylinder 12 through adjusting an adjusting nut 13, so that when a hydraulic cylinder 3 drives a positioning rod 4 to tightly abut against a pressing wheel 5 on the side wall of the web, a clamping wheel 10 is also just abutted against the side wall of the wing plate, a hand wheel 21 is rotated to drive a double-end threaded rod 18 to rotate, a limiting rod 20 limits the movement direction of a sliding block 19, the double-end threaded rod 18 drives two sliding blocks 19 to synchronously approach or separate along the axial direction of the double-end threaded rod 18 when rotating, and then the two clamping plates 8 are driven to synchronously approach or separate, and the convenient operation that the pressing rollers on the two clamping plates 8 stably press the two wing plates is realized; the end of the limiting rod 20 is fixed with a limiting block 22 which limits the displacement of the clamping plate 8 so as to prevent the sliding block 19 from falling out of the double-end threaded rod 18 and causing the clamping piece 7 to fall off.

Referring to fig. 1, the driving assembly includes a sprocket 24 coaxially and fixedly connected to the end of the conveying roller 2, the outer peripheral walls of the plurality of sprockets 24 are jointly engaged and connected with a chain 25, a motor 26 for driving one of the sprockets 24 to rotate is fixedly connected to the frame 1, and the output end of the motor 26 is coaxially and fixedly connected to the sprocket 24. Starting the motor 26, the motor 26 drives the output end to rotate and drives the chain wheel 24 fixedly connected with the motor 26 to rotate when starting, and the chain wheel 24 drives the plurality of chain wheels 24 to synchronously rotate under the transmission action of the chain 25, so that the plurality of conveying rollers 2 synchronously rotate to stably convey the wing plates.

The implementation principle of the embodiment is as follows:

two wing plates and a web plate are assembled into H-shaped steel and then are arranged on a frame 1, an adjusting screw rod 11 is adjusted on an adjusting cylinder 12, when a resisting wheel 5 is tightly pressed on the side wall of the web plate, a clamping wheel 10 on a clamping plate 8 just tightly presses the side wall of the wing plate, a hydraulic cylinder 3 is started, when the hydraulic cylinder 3 is started, a piston rod of the hydraulic cylinder is driven to drive a positioning rod 4 to approach towards the direction close to the web plate, so that the resisting wheels 5 on the two sides of the frame 1 clamp and position the web plate, the upper ends and the side walls on the two sides of the upper wing plate and the lower wing plate are tightly pressed and resisted through the pressing wheels 9 and the clamping wheels 10 on the two sides of the frame 1, a plurality of conveying rollers 2 are driven to rotate to convey the wing plate below, so that the web plate and the two wing plates can be pre-pressed and positioned before the complete assembly and splicing, the assembly precision of the, the web plate and the wing plate at the feeding port are tilted and deviated, and the synchronous clamping and positioning of the wing plate and the web plate by the pre-clamping device can be realized only by one hydraulic cylinder 3, so that the structure is simple and the error is small; simultaneously, the abutting wheel 5 can move in the width direction of the rack 1, and the clamping piece 7 can ascend and descend in the vertical direction, so that the pre-clamping device is more convenient to operate when applied to the H-shaped steel with different sizes.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a clamping device in advance of H shaped steel assemblage machine which characterized in that: the device comprises a rectangular frame-shaped rack (1), wherein a conveying mechanism and a plurality of positioning mechanisms which are arranged on two sides of the rack (1) in the width direction in a dividing manner are arranged on the rack (1);

the conveying mechanism comprises a plurality of conveying rollers (2) which are rotatably connected to the upper end face of the rack (1) and are arranged along the width direction of the rack, the conveying rollers (2) are distributed at equal intervals along the length direction of the rack (1), and a driving assembly for driving the conveying rollers (2) to rotate is arranged on the rack (1);

positioning mechanism sets up between two adjacent transfer roller (2), positioning mechanism includes horizontal rigid coupling frame (1) up end and edge pneumatic cylinder (3) that frame (1) width direction set up, the rigid coupling has locating lever (4) on the piston rod of pneumatic cylinder (3), locating lever (4) are kept away from the vertical rotation of tip of pneumatic cylinder (3) is connected with and supports tight round (5), locating lever (4) one side horizontal rigid coupling has clamp bar (6), clamp bar (6) are kept away from the one end lift of locating lever (4) is provided with clamping piece (7) of two "L" types, clamping piece (7) are used for supporting tightly and pressing from both sides tightly the avris of two pterygoid lamina, two clamping piece (7) are synchronous opposite/dorsad in the vertical direction and move.

2. The pre-clamping device of the H-shaped steel assembling machine according to claim 1, characterized in that: clamping piece (7) are including splint (8) of "L" type, the lower terminal surface of splint (8) horizontal segment rotates and is connected with pinch roller (9) along this horizontal segment length direction, the vertical section of splint (8) deviates from the vertical rotation of one side of pneumatic cylinder (3) is connected with pinch roller (10).

3. The pre-clamping device of the H-shaped steel assembling machine according to claim 2, characterized in that: keep away from clamp lever (6) the tip level of locating lever (4) slides and is provided with adjusting screw (11), adjusting screw (11) with clamp lever (6) are the quadrature setting, two clamp piece (7) set up adjusting screw (11) are kept away from the one end of pneumatic cylinder (3), clamp lever (6) are close to the horizontal rigid coupling of tip of adjusting screw (11) have with adjusting cylinder (12) of adjusting screw (11) grafting adaptation, adjusting screw (11) in the equal threaded connection of periphery wall at adjusting cylinder (12) both ends has adjusting nut (13).

4. The pre-clamping device of the H-shaped steel assembling machine according to claim 3, characterized in that: adjust a section of thick bamboo (12) periphery wall and run through and offer along its axial viewing aperture (14), adjusting screw (11) are close to one side of even number viewing aperture (14) and are provided with along its axial scale mark (15), it is close to adjust a section of thick bamboo (12) the periphery wall of viewing aperture (14) is provided with the sensing to the instruction arrow point (16) of scale mark (15).

5. The pre-clamping device of the H-shaped steel assembling machine according to claim 4, characterized in that: keep away from adjusting screw (11) the vertical rigid coupling of one end of pressing from both sides tight pole (6) has a location section of thick bamboo (17), location section of thick bamboo (17) internal rotation is connected with double threaded rod (18), the helical groove pitch at double threaded rod (18) both ends is the same and spiral opposite direction, the equal threaded connection in double threaded rod (18) both ends has slider (19), splint (8) vertical section rigid coupling is in slider (19) are kept away from one side of adjusting screw (11) just two at double threaded rod (18) both ends the vertical section of splint (8) is and sets up in opposite directions, it has two to run through to go back vertical rigid coupling on location section of thick bamboo (17) gag lever post (20) of slider (19).

6. The pre-clamping device of the H-shaped steel assembling machine according to claim 5, characterized in that: the tip rigid coupling of double-end threaded rod (18) has hand wheel (21), the tip rigid coupling of gag lever post (20) has stopper (22).

7. The pre-clamping device of the H-shaped steel assembling machine according to claim 1, characterized in that: a reinforcing piece (23) is arranged between the positioning rod (4) and the clamping rod (6).

8. The pre-clamping device of the H-shaped steel assembling machine according to claim 1, characterized in that: drive assembly includes the rigid coupling and is in sprocket (24) of transfer roller (2) tip, it is a plurality of sprocket (24) periphery wall meshes jointly and is connected with chain (25), the rigid coupling is equipped with and is used for driving one of them in frame (1) sprocket (24) rotatory motor (26).