CN112276418A - Tool for assembling before hoisting and welding - Google Patents

Abstract

The invention relates to the technical field of intelligent workshops, in particular to a tool for assembling before hoisting and welding, which comprises a rotary platform and an assembling machine; two identical assembling machines are distributed on the rotary platform in a central symmetry manner; the assembling machine comprises a turnover driving device, a pneumatic clamping and positioning device and a manual adjusting and pressing device; the pneumatic clamping and positioning device is arranged at the output end of the overturning driving device and is an overturning driving end; the manual adjusting and pressing device and the pneumatic clamping and positioning device are coaxially arranged and are turning driven ends; the driving end can be selected to be used independently or together with the driven end according to different types or sizes of workpieces; the tool can realize the butt-welding of various types of hoisting horses, the whole process only needs one person to operate, and the butt-welding precision is high and the butt-welding efficiency is high.

Description

Tool for assembling before hoisting and welding

Technical Field

The invention relates to the technical field of intelligent workshops, in particular to a tool for assembling before hoisting and welding.

Background

At present, the pre-welding assembly processes of various types of lifting horses are mostly finished by manually marking out first and then assembling and splicing, the assembly precision is low, multiple persons are required to cooperate to finish, the labor cost is high, and the assembly efficiency is low; there are also groups made using special tools, for example, patent CN110900193A, application No. 201911331421.1, applicant: xuzhou Zhichang robot system limited discloses "a flexible automatic assembly frock suitable for A type hangs horse", and the technical scheme of this patent is: the side jacking mechanism is symmetrically distributed on the machine frame on two sides of the rear end jacking mechanism, a side plate supporting platform lifting mechanism is correspondingly arranged below each group of side jacking mechanisms, and the center hole positioning mechanism is arranged in a middle through hole of the workpiece. The center hole positioning mechanism is used for positioning a multilayer board of a workpiece by taking a hole as a center, the side face jacking mechanism and the rear end jacking mechanism are used for positioning the side face of the workpiece, and the accuracy of workpiece assembly is ensured through multiple positioning.

The technical disadvantages related to the patent are as follows: the method is only limited to the assembly of A-shaped hoisting horses, and can not be simultaneously applied to the assembly of all types of hoisting horses.

Disclosure of Invention

In order to solve the technical problems in the prior art, the invention provides the tool for the assembly of the hoisting horses before welding, which is used for realizing the assembly of various hoisting horses before welding, reducing the labor cost and improving the assembly efficiency and the assembly precision.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a tool for assembling before hoisting and welding comprises a rotary platform and two assembling machines, wherein the centers of the two assembling machines are symmetrically distributed on the rotary platform; the rotary platform drives the two assembling machines to perform rotary switching and alternate assembling; the assembling machine comprises a turnover driving device, a pneumatic clamping and positioning device and a manual adjusting and pressing device;

the overturning driving device is driven by a servo motor and is in chain transmission, and is used for realizing necessary overturning of the workpiece in the assembling and spot welding processes; the pneumatic clamping and positioning device and the manual adjusting and pressing device are used for positioning and clamping during workpiece pairing; the pneumatic clamping and positioning device is arranged at the output end of the overturning driving device and is an overturning driving end; the manual adjusting and pressing device and the pneumatic clamping and positioning device are coaxially arranged and are turning driven ends; the driving end can be selected to be used independently or used together with the driven end according to different types or sizes of workpieces, and the universality of the tool is improved.

Furthermore, the pneumatic clamping and positioning device comprises a turning support, a telescopic cylinder, a supporting seat, a clamping shaft, a swinging cylinder seat, a swinging cylinder, a rocker arm, a connecting rod, a pressing tongue, a supporting plate, a straight edge positioning block, a first handle, an arc edge positioning block and a second handle;

the overturning bracket is of an L-shaped structure, the vertical end of the overturning bracket is connected with the output end of the overturning driving device, the lower side of the horizontal end is inversely provided with a telescopic cylinder, and the upper side of the horizontal end is provided with a supporting seat; the supporting seat is cylindrical and is coaxial with a piston rod of the telescopic cylinder; the lower end of the clamping shaft is fixedly sleeved on a piston rod of the telescopic cylinder; the clamping shaft is positioned in the supporting seat, and the telescopic guide of the piston rod is realized through key matching between the clamping shaft and the supporting seat; the lower end of the swing cylinder seat is fixedly connected to the upper end of the clamping shaft, and outer shaft surfaces of the swing cylinder seat and the clamping shaft form a hole positioning surface for the time-sharing crane; the swing cylinder is arranged in a cavity of the swing cylinder seat, the lower end of the swing cylinder is fixedly connected with a piston rod of the telescopic cylinder, and the upper end of the swing cylinder is fixedly connected with the rocker arm; two sides of the rocker arm are respectively hinged with a connecting rod; the two connecting rods are respectively hinged with a pressure tongue; the lower end surfaces of the two pressure tongues are aligned and exceed the upper end surface of the swing cylinder seat; the supporting plate is arranged on the supporting seat and used for hanging a horizontal mounting surface when the horse is assembled; the straight edge positioning block and the arc edge positioning block are respectively matched with the first handle and the second handle and are arranged on the supporting plate, and are used for positioning the side surface of the horse lifting assembly to prevent the workpieces from moving when the horses are assembled; the telescopic cylinder and the swing cylinder are linked to realize the distance adjustment of the pressure tongue relative to the supporting plate and the extension and retraction of the pressure tongue, so that the automatic clamping and releasing of the suspended horse assembly with various thicknesses are realized.

Furthermore, a first strip-shaped through hole and a second strip-shaped through hole are formed in the supporting plate, and the first handle and the second handle respectively penetrate through the first strip-shaped through hole and the second strip-shaped through hole to install the straight edge positioning block and the arc edge positioning block on the supporting plate.

Furthermore, the manual adjusting and pressing device comprises a driven mounting seat, a driven rotating shaft, a driven overturning bracket, a lengthened plate, a screw rod, a nut, an adjusting threaded sleeve, a locking nut, a self-locking rod, a self-locking pressing plate and a screw;

the driven mounting seat is fixedly mounted on the rotary platform; the driven overturning bracket is L-shaped, the vertical end of the driven overturning bracket is rotatably connected with the driven mounting seat through a driven rotating shaft, and the upper side of the horizontal end of the driven overturning bracket is provided with a lengthened plate; the screw rod vertically penetrates through the lengthened plate and the driven overturning bracket, and the lower end of the screw rod is locked by a nut; the adjusting screw sleeve and the locking nut are arranged on the screw rod in a matched mode, when the screw rod is assembled, a round hole in a workpiece is inserted into the adjusting screw sleeve, and the adjusting screw sleeve and the locking nut are matched for use and used for manually adjusting the supporting height of the workpiece to adapt to the change of the thicknesses of different workpieces, so that the workpiece is horizontally placed; the self-locking rod is coaxially arranged at the upper end of the screw rod; the self-locking pressing plate is sleeved on the self-locking rod and is matched with the self-locking rod for use so as to manually self-lock, compress and release the adjusted workpiece.

Furthermore, strip-shaped through holes III are formed in the driven overturning bracket and the lengthened plate, and the mounting positions of the screw rod relative to the driven overturning bracket and the lengthened plate can be changed by loosening and locking nuts, so that the axle distance between the driven end and the driving end is changed.

Furthermore, the elongated plate is provided with a fourth strip-shaped through hole, the mounting position of the elongated plate relative to the driven overturning bracket can be changed by loosening and locking the screw, and therefore the axle distance between the driven end and the driving end is further changed.

Furthermore, the rotary platform is an automatic rotary platform, so that the assembly efficiency is improved.

Furthermore, an isolation guardrail is arranged between the two assembling machines and used for separating the assembling personnel from the subsequent welding operation area and protecting the safety of the assembling personnel.

Compared with the prior art, the invention has the following remarkable advantages:

1. according to the tool for assembling the suspended horse before welding, the driving end can be independently used or the driven end can be jointly used according to different types or sizes of workpieces, so that the tool is suitable for assembling the suspended horse workpieces of different types or sizes, and has universality;

2. according to the tool for assembling before hoisting horse welding, the workpiece is accurately positioned by the pneumatic clamping and positioning device and the manual adjusting and pressing device, so that the assembling precision is improved;

3. the rotary platform can realize that two assembling machines are alternately assembled, one assembling machine carries out blanking and welding, and the other assembling machine carries out loading and assembling simultaneously, so that the assembling and subsequent welding efficiency of the crane is improved;

4. according to the tool for assembling before the welding of the hoisting horse, only one person is needed to operate in the whole process, so that the labor cost is reduced;

5. according to the tool for assembling the suspension horse before welding, the isolation guardrail is arranged between the two assembling machines, the assembling personnel are isolated from the subsequent welding operation area, and the safety of the assembling personnel is protected.

The invention is further illustrated with reference to the following figures and examples.

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

Fig. 2 is a schematic view of the clamping of the short workpiece 4 according to the invention.

Fig. 3 is a schematic view of clamping the long workpiece 5 according to the present invention.

Fig. 4 is a front view of the pneumatic clamp positioning device 22 of the present invention.

Fig. 5 is a top view of the pneumatic clamp positioning device 22 of the present invention.

Fig. 6 is a front view of the manual adjustment device 23 of the present invention.

Fig. 7 is a top view of the manual adjustment device 23 of the present invention.

In the figure:

1. the device comprises a rotary platform, a group assembling machine, a separation guardrail, a short workpiece, a long workpiece and a short workpiece, wherein the rotary platform comprises 2 a group assembling machine, 3a separation guardrail, 4;

21. the overturning device comprises an overturning driving device 22, a pneumatic clamping and positioning device 23 and a manual adjusting device;

201. the device comprises a turnover support 202, a telescopic cylinder 203, a support seat 204, a clamping shaft 205, a swing cylinder seat 206, a swing cylinder 207, a swing arm 208, a connecting rod 209, a pressing tongue 210, a support plate 211, a straight edge positioning block 212, a first handle 213, an arc edge positioning block 214 and a second handle;

2101. the strip-shaped through holes I and 2102 and the strip-shaped through holes II are formed;

301. the self-locking mechanism comprises a driven mounting seat 302, a driven rotating shaft 303, a driven overturning bracket 304, a lengthening plate 305, a screw rod 306, an adjusting threaded sleeve 307, a locking nut, a 308 self-locking rod, a 309 self-locking pressing plate, a 310 nut and a 311 screw;

3041. a third strip-shaped through hole 3042 and a fourth strip-shaped through hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include typical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Example one

As shown in fig. 1, 2 and 3, the tool for assembling before suspension welding comprises a rotary platform 1 and two assembling machines 2, wherein the centers of the two assembling machines are symmetrically distributed on the rotary platform 1; the rotary platform 1 drives the two assembling machines 2 to perform rotary switching and alternate assembling; the assembly machine 2 comprises a turnover driving device 21, a pneumatic clamping and positioning device 22 and a manual adjusting and pressing device 23;

the overturning driving device 21 is driven by a servo motor and is in chain transmission, and is used for realizing necessary overturning of a workpiece in the assembling and spot welding processes; the pneumatic clamping and positioning device 22 and the manual adjusting and pressing device 23 are used for positioning and clamping during workpiece pairing; the pneumatic clamping and positioning device 22 is arranged at the output end of the overturning driving device 21 and is an overturning driving end; the manual adjusting and pressing device 23 and the pneumatic clamping and positioning device 22 are coaxially arranged and are turning driven ends; the driving end can be selected to be used independently or used together with the driven end according to different types or sizes of workpieces, so that the universality of the tool is improved: the short workpiece 4, such as an A, B, C-type crane, can realize the assembly process only by using the driving end; when the long workpiece 5, such as an D, E-type crane, is paired, the driving end and the driven end are required to be used simultaneously.

Further, as shown in fig. 4, the pneumatic clamping and positioning device 22 includes a turning bracket 201, a telescopic cylinder 202, a supporting seat 203, a clamping shaft 204, a swing cylinder seat 205, a swing cylinder 206, a swing arm 207, a connecting rod 208, a pressing tongue 209, a supporting plate 210, a straight edge positioning block 211, a first handle 212, a curved edge positioning block 213 and a second handle 214;

the overturning bracket 201 is of an L-shaped structure, the vertical end of the overturning bracket is connected with the output end of the overturning driving device 21, the lower side of the horizontal end is inversely provided with a telescopic cylinder 202, and the upper side is provided with a supporting seat 203; the supporting seat 203 is cylindrical and is coaxial with a piston rod of the telescopic cylinder 202; the lower end of the clamping shaft 204 is fixedly sleeved on a piston rod of the telescopic cylinder 202; the clamping shaft 204 is positioned in the supporting seat 203, and the telescopic guide of the piston rod is realized through key matching between the clamping shaft and the supporting seat; the lower end of the swing cylinder block 205 is fixedly connected to the upper end of the clamp shaft 204, and the outer shaft surfaces of the swing cylinder block and the clamp shaft form a hole positioning surface for the time-sharing crane; the swing cylinder 206 is arranged in the cavity of the swing cylinder seat 205, the lower end of the swing cylinder is fixedly connected with the piston rod of the telescopic cylinder 202, and the upper end of the swing cylinder is fixedly connected with the rocker arm 207; two sides of the rocker arm 207 are respectively hinged with a connecting rod 208; the two connecting rods 208 are respectively hinged with a pressure tongue 209; the lower end faces of the two pressing tongues 209 are aligned and exceed the upper end face of the swing cylinder block 205; the supporting plate 210 is arranged on the supporting seat 203 and is used for hanging a horizontal mounting surface when the horse is assembled; the straight-edge positioning block 211 and the arc-edge positioning block 213 are respectively matched with the first handle 212 and the second handle 214 and are arranged on the supporting plate 210, and are used for positioning the side surface of the horse hanging assembly to prevent the workpieces from moving when the workpieces are assembled; the telescopic cylinder 202 and the swing cylinder 206 are linked to realize the distance adjustment of the pressure tongue 209 relative to the support plate 210 and the extension and retraction of the pressure tongue 209, so that the automatic clamping and releasing of the suspension horse assembly with different thicknesses are realized.

Further, as shown in fig. 5, a first strip-shaped through hole 2101 and a second strip-shaped through hole 2102 are formed in the supporting plate 210, and the first handle 212 and the second handle 214 respectively penetrate through the first strip-shaped through hole 2101 and the second strip-shaped through hole 2102 to mount the straight-edge positioning block 211 and the arc-edge positioning block 213 on the supporting plate 210.

Further, as shown in fig. 6, the manual adjusting and pressing device 23 includes a driven mounting seat 301, a driven rotating shaft 302, a driven turning bracket 303, an elongated plate 304, a screw 305, a nut 306, an adjusting screw 307, a locking nut 308, a self-locking rod 309, a self-locking pressing plate 310 and a screw 311;

the driven mounting base 301 is fixedly mounted on the rotary platform 1; the driven overturning bracket 303 is L-shaped, the vertical end of the driven overturning bracket is rotatably connected with the driven mounting seat 301 through the driven rotating shaft 302, and the upper side of the horizontal end of the driven overturning bracket is provided with an elongated plate 304; the screw 305 vertically passes through the lengthened plate 304 and the driven overturning bracket 303, and the lower end of the screw is locked by a nut 306; the adjusting threaded sleeve 307 and the locking nut 308 are arranged on the screw 305 in a matched mode, when the adjusting threaded sleeve 307 and the locking nut 308 are assembled, a round hole in a workpiece is inserted into the adjusting threaded sleeve 307, and the adjusting threaded sleeve 307 and the locking nut 308 are used in a matched mode and used for manually adjusting the supporting height of the workpiece to adapt to the change of the thicknesses of different workpieces, so that the workpiece is horizontally placed; the self-locking bar 309 is coaxially installed at the upper end of the screw 305; the self-locking pressing plate 310 is sleeved on the self-locking rod 309 and is matched with the self-locking rod 309 to perform manual self-locking pressing and releasing on the adjusted workpiece.

Further, as shown in fig. 7, the driven turning bracket and the elongated plate 304 are both provided with a third strip-shaped through hole 3041, and the mounting positions of the screw 305 relative to the driven turning bracket 303 and the elongated plate 304 can be changed by loosening and locking the nut 306, so that the axle distance between the driven end and the driving end is changed.

Further, as shown in fig. 7, a strip-shaped through hole four 3042 is provided on the elongated plate 304, and the mounting position of the elongated plate 304 relative to the driven turning bracket 303 can be changed by loosening and locking the screw 311, so as to further change the axle distance between the driven end and the driving end.

Furthermore, the rotary platform 1 is an automatic rotary platform, and the assembly efficiency is improved.

Further, as shown in fig. 1, an isolation guardrail 3 is arranged between the two pairing machines and used for separating the pairing personnel from the subsequent welding operation area and protecting the safety of the pairing personnel.

A method for assembling a hoisting horse before welding comprises the following steps:

(1) opening the tool: the telescopic cylinder 202 is controlled to act to enable the piston rod to be in an extending state, and the swing cylinder 206 is controlled to act to enable the pressure tongue 209 to be in a retracting state;

(2) clamping and positioning a lower diaphragm plate: the lower membrane plate of the horse crane is positioned on the supporting plate 210 according to holes by a person or a robot, the first handle 212 or the second handle 214 is loosened manually, the straight edge positioning block 211 or the arc edge positioning block 213 is adjusted, and the first handle 212 or the second handle 214 is locked after the side surface of the membrane plate is positioned;

(3) panel, last diaphragm clamping location: the panel and the upper diaphragm plate of the crane are sequentially coaxially and directionally arranged on the lower diaphragm plate by a worker or a robot, the swinging cylinder 206 is controlled to act to enable the pressing tongue 209 to be in an extending state, and the telescopic cylinder 202 is controlled to act to enable the pressing tongue 209 to press the upper diaphragm plate of the workpiece; if the workpiece is a long workpiece 5, the driven end needs to be adjusted before installation to be suitable for the installation hole distance of the panel and meet the requirement of the placement level of the panel, the self-locking pressing plate 310 needs to be manually sleeved on the self-locking rod 309 during clamping, and the hammer is used for knocking the end part of the self-locking pressing plate 310 to tightly press the other end of the panel, so that the workpiece is completely positioned and clamped;

(4) spot welding: spot welding the upper diaphragm plate and the panel together by using a robot or a worker, then starting the turnover driving device 21 to turn the workpiece over 180 degrees, and spot welding the lower diaphragm plate and the panel together;

(5) mounting and spot welding a web plate and a toggle plate: mounting the web plate and the toggle plate on a panel by using a robot or a worker according to the design requirements of a drawing, and then performing spot welding, and completing the assembly of the lifting horse;

(6) loosening the assembly: starting the rotary platform 1 to rotate 180 degrees, sending the assembly into a working area of the next procedure, and controlling the telescopic cylinder 202 and the swing cylinder 206 to release the assembly in a linkage manner; if the workpiece is a long workpiece 5, a hammer is needed to reversely knock the end part of the self-locking pressing plate 310 at the driven end before the rotary platform 1 is started, the self-locking pressing plate 310 is taken down, and the other end of the panel is loosened;

(7) blanking: and taking down the assembly by the transfer robot to enter the next procedure, and meanwhile, continuously carrying out assembly on the next hanging horse workpiece on the other assembly machine, and sequentially circulating the processes.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are presented in the description to illustrate the principles of the invention, but that various modifications and changes may be made without departing from the spirit and scope of the invention, which is intended to be protected by the following claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (9)

1. The utility model provides a hang horse and weld preceding group to using frock, includes that rotary platform and central symmetric distribution are to the machine of two groups on rotary platform, and rotary platform drives two groups and switches, alternate group to the machine gyration, its characterized in that: the assembling machine comprises a turnover driving device, a pneumatic clamping and positioning device and a manual adjusting and pressing device;

the overturning driving device is driven by a servo motor and is in chain transmission, and is used for realizing necessary overturning of the workpiece in the assembling and spot welding processes; the pneumatic clamping and positioning device and the manual adjusting and pressing device are used for positioning and clamping during workpiece pairing; the pneumatic clamping and positioning device is arranged at the output end of the overturning driving device and is an overturning driving end; the manual adjusting and pressing device and the pneumatic clamping and positioning device are coaxially arranged and are turning driven ends; the driving end can be selected to be used alone or together with the driven end according to different types or sizes of workpieces.

2. The tool for assembling before horse welding of the crane according to claim 1, characterized in that: the pneumatic clamping and positioning device comprises a turning support, a telescopic cylinder, a supporting seat, a clamping shaft, a swinging cylinder seat, a swinging cylinder, a rocker arm, a connecting rod, a pressing tongue, a supporting plate, a straight edge positioning block, a first handle, an arc edge positioning block and a second handle;

the overturning bracket is of an L-shaped structure, the vertical end of the overturning bracket is connected with the output end of the overturning driving device, the lower side of the horizontal end is inversely provided with a telescopic cylinder, and the upper side of the horizontal end is provided with a supporting seat; the supporting seat is cylindrical and is coaxial with a piston rod of the telescopic cylinder; the lower end of the clamping shaft is fixedly sleeved on a piston rod of the telescopic cylinder; the clamping shaft is positioned in the supporting seat, and the telescopic guide of the piston rod is realized through key matching between the clamping shaft and the supporting seat; the lower end of the swing cylinder seat is fixedly connected to the upper end of the clamping shaft, and outer shaft surfaces of the swing cylinder seat and the clamping shaft form a hole positioning surface for the time-sharing crane; the swing cylinder is arranged in a cavity of the swing cylinder seat, the lower end of the swing cylinder is fixedly connected with a piston rod of the telescopic cylinder, and the upper end of the swing cylinder is fixedly connected with the rocker arm; two sides of the rocker arm are respectively hinged with a connecting rod; the two connecting rods are respectively hinged with a pressure tongue; the lower end surfaces of the two pressure tongues are aligned and exceed the upper end surface of the swing cylinder seat; the supporting plate is arranged on the supporting seat and used for hanging a horizontal mounting surface when the horse is assembled; the straight edge positioning block and the arc edge positioning block are respectively matched with the first handle and the second handle and are arranged on the supporting plate and used for positioning the side face of the horse lifting set; the telescopic cylinder and the swing cylinder are linked to realize the distance adjustment of the pressure tongue relative to the supporting plate and the extension and retraction of the pressure tongue.

3. The tool for assembling before horse welding of the crane according to claim 2, characterized in that: the straight edge positioning block and the arc edge positioning block are arranged on the supporting plate through the first handle and the second handle which respectively penetrate through the first strip-shaped through hole and the second strip-shaped through hole.

4. The tool for assembling before horse welding of the crane according to claim 1, characterized in that: the manual adjusting and pressing device comprises a driven mounting seat, a driven rotating shaft, a driven overturning bracket, a lengthening plate, a screw, a nut, an adjusting threaded sleeve, a locking nut, a self-locking rod, a self-locking pressing plate and a screw;

the driven mounting seat is fixedly mounted on the rotary platform; the driven overturning bracket is L-shaped, the vertical end of the driven overturning bracket is rotatably connected with the driven mounting seat through a driven rotating shaft, and the upper side of the horizontal end of the driven overturning bracket is provided with a lengthened plate; the screw rod vertically penetrates through the lengthened plate and the driven overturning bracket, and the lower end of the screw rod is locked by a nut; the adjusting screw sleeve and the locking nut are arranged on the screw rod in a matched mode, when the screw rod is assembled, a round hole in a workpiece is inserted into the adjusting screw sleeve, and the adjusting screw sleeve and the locking nut are matched for use and used for manually adjusting the supporting height of the workpiece to adapt to the change of the thicknesses of different workpieces, so that the workpiece is horizontally placed; the self-locking rod is coaxially arranged at the upper end of the screw rod; the self-locking pressing plate is sleeved on the self-locking rod and is matched with the self-locking rod for use so as to manually self-lock, compress and release the adjusted workpiece.

5. The tool for assembling before horse welding of the crane according to claim 4, wherein: all be equipped with bar through-hole three on driven upset support and the extension plate, can change the mounted position of screw rod for driven upset support and extension plate through loosening and lock nut to change the wheel base of driven end and drive end.

6. The tool for the assembly before the welding of the hoisting horse of claim 4 or 5, wherein: the lengthened plate is provided with a fourth strip-shaped through hole, and the mounting position of the lengthened plate relative to the driven overturning bracket can be changed by loosening and locking the screw, so that the axle distance between the driven end and the driving end is further changed.

7. The tool for assembling before horse welding of the crane according to claim 1, characterized in that: the rotary platform is an automatic rotary platform.

8. The tool for assembling before horse welding of the crane according to claim 1, characterized in that: and an isolation guardrail is arranged between the two pairing machines and is used for isolating the pairing personnel from the subsequent welding operation area.

9. The assembling method before the welding of the crane horse is characterized in that: the method uses the tool for the suspension horse welding front group assembly according to any one of claims 1 to 8, and comprises the following steps:

(1) opening the tool: the telescopic cylinder is controlled to act to enable the piston rod to be in an extending state, and the swing cylinder is controlled to act to enable the pressure tongue to be in a retracting state;

(2) clamping and positioning a lower diaphragm plate: the lower membrane plate of the horse crane is positioned on the supporting plate according to the holes by manpower or a robot, the first handle or the second handle is manually loosened, the straight edge positioning block or the arc edge positioning block is adjusted, and the first handle or the second handle is locked after the side surface of the membrane plate is positioned;

(3) panel, last diaphragm clamping location: the panel and the upper diaphragm plate of the lifting horse are coaxially and directionally arranged on the lower diaphragm plate by a worker or a robot in sequence, the swinging cylinder is controlled to act to enable the pressing tongue to be in an extending state, and the telescopic cylinder is controlled to act to enable the pressing tongue to tightly press the upper diaphragm plate of the workpiece; if the workpiece is a long workpiece, the driven end is required to be adjusted to be suitable for the mounting hole distance of the panel and meet the requirement of the placement level of the panel before mounting, the self-locking pressing plate is required to be manually sleeved on the self-locking rod during clamping, and the hammer is used for knocking the end part of the self-locking pressing plate to press the other end of the panel, so that the workpiece is completely positioned and clamped;

(4) spot welding: spot welding the upper diaphragm plate and the panel together by using a robot or a worker, starting a turnover driving device to turn the workpiece over 180 degrees, and spot welding the lower diaphragm plate and the panel together;

(5) mounting and spot welding a web plate and a toggle plate: mounting the web plate and the toggle plate on a panel by using a robot or a worker according to the design requirements of a drawing, and then performing spot welding, and completing the assembly of the lifting horse;

(6) loosening the assembly: starting the rotary platform to rotate 180 degrees, sending the assembly into a working area of the next procedure, and controlling the telescopic cylinder and the swing cylinder to release the assembly in a linkage manner; if the workpiece is a long workpiece, a hammer is used for reversely knocking the end part of the self-locking pressing plate at the driven end before the rotary platform is started, the self-locking pressing plate is taken down, and the other end of the panel is released;

(7) blanking: and taking down the assembly by the transfer robot to enter the next procedure, and meanwhile, continuously carrying out assembly on the next hanging horse workpiece on the other assembly machine, and sequentially circulating the processes.

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