CN211759324U - Auxiliary frame positioning and assembling tool - Google Patents

Abstract

The utility model relates to an auxiliary frame location equipment frock, it includes fixed equipment position, first locating component, activity equipment position, second locating component, slip structure and auto-lock structure, wherein each slip cylinder can drive and correspond the slip platform so that each crossbeam slides and feed to and correspond the concatenation department of longeron, and the auto-lock structure is used for respectively with the slip platform and the workstation locking that correspond. Compared with the prior art, the utility model discloses can load and fix a position each crossbeam and the longeron of sub vehicle frame firmly to make things convenient for each crossbeam and the equipment that corresponds the longeron through the sliding structure, can lock the sliding platform and the workstation that correspond through self-locking structure simultaneously, thereby can avoid the influence that the sliding cylinder received the pulling force resilience of welding heat production, can effectively avoid alleviating the influence of the in-process because of the heat concentrates the deformation that produces the part simultaneously, improve the repeatability and the stability of location equipment frock, prolong the life of frock simultaneously.

Description

Auxiliary frame positioning and assembling tool

Technical Field

The utility model relates to an automobile chassis parts machining field especially relates to an auxiliary vehicle frame positioning equipment frock.

Background

The auxiliary frame is a framework of the front axle and the rear axle and is an important component of the automobile chassis, the main function of the auxiliary frame is to weaken the impact of road vibration on an automobile body, improve the connection rigidity of a suspension system and improve the comfort and the stability of the automobile in the driving process, and in addition, the auxiliary frame can also reduce the noise caused by the vibration of an engine and the road surface and improve the mute level in an automobile cabin.

With the continuous development and progress of welding technology, modern welding technology is more and more widely applied to the manufacturing industry of mechanical equipment, and a welding tool clamp not only can ensure the manufacturing precision of products, but also can improve the labor productivity and effectively reduce the labor intensity of workers. Along with the promotion of whole car quality in recent years, the requirement to sub vehicle frame precision is higher and higher, and the part can produce the deformation because of heat is concentrated in welding process, and form certain tensile resilience to frock clamp's slip cylinder, influences welding frock clamp's repeatability precision and stability, can reduce the life-span of the locating pin that uses in the slip structure simultaneously.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the first technical problem that provide a firm sub vehicle frame location equipment frock in location to prior art.

The utility model aims to solve the second technical problem that to prior art and provide a convenient sub vehicle frame location equipment frock of equipment.

The utility model aims to solve the third technical problem that to prior art and provide a can avoid welding heat deformation's sub vehicle frame location equipment frock.

The utility model provides a technical scheme that at least one above-mentioned technical problem adopted does: a positioning and assembling tool for an auxiliary frame comprises a workbench and is characterized in that,

the fixed assembling positions are respectively arranged on the left side and the right side of the workbench and are respectively used for loading a left longitudinal beam and a right longitudinal beam;

the first positioning assemblies are respectively arranged on the left side and the right side of the workbench and are respectively used for positioning the longitudinal beams on the fixed assembly positions;

the movable assembling positions are respectively arranged at the front side and the rear side of the workbench and are respectively used for loading the front cross beam and the rear cross beam;

the second positioning assemblies are respectively arranged at the front side and the rear side of the workbench and are respectively used for fixing the cross beams on the movable assembly positions;

the sliding structures are respectively arranged on the front side and the rear side of the workbench and are respectively provided with a sliding platform and sliding cylinders arranged on the sliding platform, each movable assembly position is respectively arranged on the corresponding sliding platform, and each sliding cylinder can drive the corresponding sliding platform to enable each cross beam to be fed to the splicing part of the corresponding longitudinal beam in a sliding manner; and

and the self-locking structures are respectively arranged on the front side and the rear side of the workbench and are used for locking the corresponding sliding platform and the workbench.

In order to enable the sliding structures to better drive the cross beams to slide towards the corresponding longitudinal beams, each sliding structure further comprises a sliding assembly, each sliding assembly comprises a sliding rail fixed at the bottom of the sliding platform in the front-back direction and a sliding strip fixed on the table top of the workbench, each sliding strip is embedded in the sliding rail and can slide back and forth along the sliding rail, an air cylinder seat used for installing a sliding air cylinder is fixed at the inner side end of the sliding platform respectively, the air cylinder seat is bent and comprises a horizontal plate and a vertical plate, the vertical plate is horizontally arranged on the horizontal plate and is located on the inner side of the corresponding horizontal plate, the sliding air cylinder is fixed on the horizontal plate, and a piston rod of the sliding air cylinder can act on the vertical plate, so that each sliding air cylinder can better drive the corresponding sliding platform.

In order to enable each cross beam to be stably placed on the corresponding movable assembly positions, each sliding platform extends along the left and right directions of the workbench, each movable assembly position is arranged at the left and right ends of the corresponding sliding platform respectively and corresponds to the left and right ends of the corresponding cross beam respectively, each movable assembly position comprises a first placing block, a first clamping block and a second clamping block which are fixed on the table surface of the sliding platform, wherein the first placing block can abut against the bottom surface of the corresponding end of the corresponding cross beam, and the first clamping block and the second clamping block can be clamped on the front side surface and the rear side surface of the corresponding end of the corresponding cross beam respectively.

Furthermore, in order to enable each cross beam to be placed on the corresponding movable assembly position more stably, each sliding platform is further provided with a first positioning cylinder, a piston rod of each first positioning cylinder is fixed with a positioning pin extending vertically, and each positioning pin can be inserted into a first positioning hole in the bottom of the corresponding cross beam.

In order to enable each second positioning component to more stably position the corresponding cross beam, each second positioning component comprises a first pressing cylinder and a second pressing cylinder, wherein the number of the first pressing cylinders is two, the first pressing cylinders are respectively arranged at the outer sides of the corresponding movable assembly positions, a piston rod of each first pressing cylinder is respectively fixed with a first pressing head used for pressing the top surface of the corresponding end of the corresponding cross beam from top to bottom, the number of the second pressing cylinders is also two, each cross beam and each longitudinal beam are respectively positioned at the inner sides of each cross beam and the longitudinal beam in a loading state, a piston rod of each second pressing cylinder is respectively fixed with a first connecting block, each first connecting block is respectively fixed with a second pressing head and a third pressing head, the second pressing heads are used for pressing the splicing positions of each cross beam and the corresponding longitudinal beam from top to bottom, and the third pressing heads are used for pressing the top surfaces of the corresponding cross beams from top to bottom, and each third pressure head is positioned at the inner side of the corresponding second pressure head.

In order to enable each longitudinal beam to be stably placed on the corresponding fixed assembling positions, each fixed assembling position respectively comprises a second placing block and a third clamping block which are respectively fixed on the workbench, the second placing block can be abutted to the bottom surface of the middle part of the corresponding longitudinal beam, the third clamping blocks are four and arranged in pairs at the left and right, and each third clamping block can be abutted to the corresponding side surface of the corresponding longitudinal beam.

For making each first location subassembly can fix a position the longeron that corresponds more firmly, first location subassembly includes that the third compresses tightly cylinder and second location cylinder, is fixed with the link on the piston rod that above-mentioned third compressed tightly the cylinder, is connected with the fourth pressure head on this link, and this fourth pressure head can compress tightly on the top surface at corresponding longeron middle part from top to bottom, wears to locate the location sleeve at corresponding longeron middle part from top to bottom on the piston rod of above-mentioned second location cylinder, and this second location cylinder is located the bottom that corresponds the longeron.

Furthermore, the third pressing cylinder and the second positioning cylinder are matched to enable each longitudinal beam to be positioned on the corresponding fixed mounting position more stably, each positioning sleeve is obliquely arranged in the corresponding longitudinal beam in a penetrating mode, and the upper end of each positioning sleeve is connected with the connecting frame through the second connecting block.

Furthermore, each self-locking structure comprises a self-locking cylinder and a self-locking hole, the self-locking cylinders vertically penetrate through the corresponding sliding platforms, self-locking pins are respectively fixed on piston rods of the self-locking cylinders, the self-locking pins are located below the corresponding sliding platforms, and the self-locking holes are formed in the table top of the workbench and are used for the self-locking pins to be inserted. Therefore, when the self-locking pin is inserted into the corresponding self-locking hole, the sliding platform can be stably locked on the workbench.

Compared with the prior art, the utility model has the advantages of: the utility model discloses in fix a position left and right longeron firmly on the fixed equipment position that corresponds through first locating component, fix a position preceding, back crossbeam firmly on the activity equipment position that corresponds through second locating component simultaneously, can realize the firm location to each longeron and each crossbeam through first, second locating component like this. The sliding structure can slide the corresponding crossbeam to feed to the splicing part corresponding to the longitudinal beam, thereby facilitating the assembly of each crossbeam and the corresponding longitudinal beam, in addition, the sliding platform and the workbench which correspond can be locked through the self-locking structure, thereby avoiding the influence of tension resilience generated by welding heat on the sliding cylinder, effectively avoiding the influence of deformation generated by heat concentration in the welding process on parts, improving the repeatability and stability of positioning and assembling tools, and prolonging the service life of the tools.

Drawings

Fig. 1 is a schematic structural view (in a working state) of an auxiliary frame positioning and assembling tool in an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 in another direction;

FIG. 3 is a schematic structural view of a workbench according to an embodiment of the present invention;

fig. 4 is a schematic view of a partial structure of the subframe positioning assembly tool in an embodiment of the present invention in a working state;

FIG. 5 is a schematic view of a partial structure of the subframe positioning assembly fixture in an embodiment of the present invention in an inoperative state;

fig. 6 is a schematic structural view of a slide-in structure in an embodiment of the present invention;

FIG. 7 is a schematic view of the flexible orientation of FIG. 6;

fig. 8 is a schematic structural diagram of the auxiliary frame in the embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 8, an auxiliary frame positioning and assembling tool includes a workbench 1, the workbench 1 is shaped like a square frame, the left and right sides of the workbench are respectively provided with a fixed assembling position 2 and a first positioning component 3, wherein each fixed assembling position 2 is respectively used for loading a left longitudinal beam 83 and a right longitudinal beam 84, and each first positioning component 3 is in one-to-one correspondence with each fixed assembling position 2 and is respectively used for positioning the longitudinal beams on each fixed assembling position 2. Meanwhile, the front side and the rear side of the workbench 1 are respectively provided with a movable assembly position 4, a second positioning assembly 5, a sliding structure 6 and a self-locking structure 7, wherein each movable assembly position 4 is used for loading a front cross beam 81 and a rear cross beam 82, each second positioning assembly 5 corresponds to each movable assembly position 4 one by one and is used for positioning the cross beam on each movable assembly position 4, each sliding structure 6 is provided with a sliding platform 61 and a sliding cylinder 62 arranged on the sliding platform 61, each movable assembly position 4 is arranged on the corresponding sliding platform 61, each sliding cylinder 62 can drive the corresponding sliding platform 61 to enable each cross beam to be fed to the splicing position of the corresponding longitudinal beam in a sliding manner, and each locking structure 7 is used for locking the corresponding sliding platform 61 and the workbench 1.

Therefore, in the present embodiment, the left and right longitudinal beams 83, 84 are stably positioned on the corresponding fixed assembly positions 2 by the first positioning component 3, and the front and rear cross beams 81, 82 are stably fixed and positioned on the corresponding movable assembly positions 4 by the second positioning component 5, so that the stable positioning of each longitudinal beam and each cross beam can be realized by the first and second positioning components 3, 5. The sliding structure 6 can slide the corresponding crossbeam and feed to and correspond the concatenation department of longeron, thereby make things convenient for each crossbeam and the equipment that corresponds the longeron, in addition, can lock the sliding platform 61 that corresponds with workstation 1 through self-locking structure 7, thereby can avoid sliding cylinder 62 to receive the influence that the pulling force that the welding heat produced kick-backs, can effectively avoid the influence of the deformation that produces the part because of the heat is concentrated in the welding process simultaneously, improve the repeatability and the stability of location equipment frock, prolong the life of frock simultaneously.

Furthermore, the slide platform 61 of each slide structure is elongated and arranged along the length direction of the workbench 1, each slide assembly 63 includes a slide rail 631 fixed to the bottom of the slide platform 61 along the front-back direction and a slide bar 632 fixed to the top 10 of the workbench 1, each slide bar 632 is embedded in the slide rail 631 and can slide back and forth along the slide rail 631, and thus the slide structure can better drive each cross beam to slide towards the corresponding longitudinal beam by arranging the slide assembly 63. In this embodiment, a notch 611 is formed in the middle of the inner end of each sliding platform 61, and a cylinder block 621 for mounting the sliding cylinder 62 is fixed in the notch 611, in this embodiment, the cylinder block 621 is bent and includes a horizontal plate 6211 and a vertical plate 6212 vertically disposed, the vertical plate 6212 is located inside the corresponding horizontal plate 6211, the sliding cylinder 62 is fixed on the horizontal plate 6211, and the piston rod of the sliding cylinder 62 can act on the vertical plate 6212, so that each sliding cylinder 62 can better drive the corresponding sliding platform 61. In addition, the corresponding positions of the front side and the rear side of the workbench 1 are respectively provided with a square mounting frame 11, and each sliding cylinder 62 and the cylinder seat 621 thereof are positioned in the corresponding mounting frame 11, so that the installation of each sliding cylinder 62 is more stable, and certain limiting effect can be achieved on the sliding action of each sliding platform 61, and the transitional sliding is avoided. In addition, in this embodiment, there are two pairs of sliding assemblies 63 in each sliding structure 6, wherein one pair of sliding assemblies 63 is symmetrically disposed on two sides of the sliding cylinder 62, and the other pair of sliding assemblies 63 is symmetrically disposed on the left and right ends of the sliding platform 61, so that the sliding of the sliding platform 61 is more stable.

In this embodiment, each of the self-locking structures 7 includes a self-locking cylinder 71 and a self-locking hole 12, each of the self-locking cylinders 71 vertically penetrates through the corresponding sliding platform 61, a piston rod of each of the self-locking cylinders 71 is fixed with a self-locking pin 711, the self-locking pin 711 is located below the corresponding sliding platform 61, and the self-locking hole 12 is disposed on the table top 10 of the workbench 1 and is used for the self-locking pin 711 to be inserted. Thus, when the self-locking pin 711 is inserted into the corresponding self-locking hole 12, the sliding platform 61 can be stably locked on the workbench 1, and preferably, in the present embodiment, two self-locking structures 7 are respectively disposed on each sliding platform 61, and the two self-locking structures 7 are respectively disposed at the left and right sides of the outer end of the sliding platform 61, so that the sliding platform 61 can be better self-locked by the self-locking structures 7 at both sides. Like this when the drive of sliding cylinder 62 is slided into platform 61, make corresponding crossbeam slide in to with correspond the longeron when the concatenation department, each self-locking cylinder 71 starts, lockpin 711 down inserts corresponding from lockhole 12 separately, thereby with sliding platform 61 locking on workstation 1, can avoid sliding cylinder 62 to receive the influence that the pulling force that the welding heat produced kick-backs, can effectively avoid the influence of the deformation that produces the part because of heat concentration among the welding process simultaneously, improve the repeatability and the stability of location equipment frock, prolong the life of frock simultaneously.

Further, each movable assembly position 4 is respectively disposed at the left and right ends of the corresponding sliding platform 61 and respectively corresponds to the left and right ends of the corresponding beam, and each movable assembly position 4 includes a first placing block 41, a first clamping block 42 and a second clamping block 43 fixed on the table top 10 of the sliding platform 61. When each cross beam is placed on the corresponding movable assembly position 4, the first placing block 41 can be abutted against the bottom surface of the corresponding end of the corresponding cross beam, and the first clamping block 42 and the second clamping block 43 can be clamped on the front side surface and the rear side surface of the corresponding end of the corresponding cross beam respectively, so that each cross beam can be stably placed on the corresponding movable assembly position 4. Preferably, in order to enable each cross beam to be placed on the corresponding movable assembly position 4 more firmly, each sliding platform 61 is further provided with a first positioning cylinder 44, a piston rod of each first positioning cylinder 44 is fixed with a vertically extending positioning pin 441, and each positioning pin 441 can be inserted into the first positioning hole 85 at the bottom of the corresponding cross beam. In this embodiment, the number of the first positioning cylinders 44 is two, and the two first positioning holes 85 are symmetrically arranged with respect to the sliding cylinder 62, so that the corresponding cross beam can be more stably positioned on the corresponding movable assembly position 4 by the first positioning cylinders 44 on both sides. In addition, each fixed equipment position 2 is including respectively fixing the second on workstation 1 and placing piece 21 and third and pressing from both sides tight piece 22, and when each longeron was placed on corresponding fixed equipment position 2, the second was placed the piece 21 and can be supported with the bottom surface that corresponds the longeron middle part, and the third presss from both sides tight piece 22 and two sets of left and right sides setting, and each third presss from both sides tight piece 22 and can be supported with the corresponding side of corresponding longeron respectively to enable each longeron and firmly be placed on corresponding fixed equipment position 2.

Each of the second positioning assemblies 5 includes two first pressing cylinders 51 and two second pressing cylinders 52, wherein the first pressing cylinders 51 are respectively disposed at the outer sides of the corresponding movable assembly positions 4, the piston rod of each first pressing cylinder 51 is fixed with two first pressing heads 511 for pressing the top surfaces of the corresponding ends of the corresponding cross beams from top to bottom, the second pressing cylinders 52 are also two, each second pressing cylinder 52 is respectively disposed at the inner sides of each cross beam and each longitudinal beam in the loading state of each cross beam and each longitudinal beam, the piston rod of each second pressing cylinder 52 is respectively fixed with a first connecting block 521, each first connecting block 521 is respectively fixed with a second pressing head 522 and a third pressing head 523, wherein the second pressing head 522 is used for pressing the joint of each cross beam and the corresponding longitudinal beam from top to bottom, and the third pressing head 523 is used for pressing the top surfaces of the corresponding cross beam from top to bottom, and each third ram 523 is located inside a corresponding second ram 522. Meanwhile, the first positioning assembly 3 includes a third pressing cylinder 31 and a second positioning cylinder 32, a connecting frame 311 is fixed on a piston rod of the third pressing cylinder 31, a fourth pressing head 312 is connected on the connecting frame 311, the fourth pressing head 312 can be pressed on the top surface of the middle part of the corresponding longitudinal beam from top to bottom, a positioning sleeve 321 which penetrates through a second positioning hole 86 in the middle part of the corresponding longitudinal beam from top to bottom is fixed on a piston rod of the second positioning cylinder 32, and the second positioning cylinder 32 is located at the bottom of the corresponding longitudinal beam. Thus, each longitudinal beam and each cross beam can be stably positioned on the corresponding assembly position through the first positioning assembly 3 and the second positioning assembly 5. Preferably, each of the positioning sleeves 321 is obliquely inserted into the corresponding longitudinal beam, and the upper end of the positioning sleeve 321 is connected to the connecting frame 311 through the second connecting block 322, so that each longitudinal beam can be more stably positioned on the corresponding fixed mounting position through the cooperation of the third pressing cylinder 31 and the second positioning cylinder 32.

The working process of the utility model is as follows:

the left longitudinal beam 83 and the right longitudinal beam 84 are respectively placed on the corresponding fixed assembly positions 2, the end parts of the longitudinal beams are pre-positioned through the third clamping blocks 22, and then the middle parts of the longitudinal beams are positioned through the corresponding first positioning assemblies 3, so that the left longitudinal beam 83 and the right longitudinal beam 84 are stably positioned on the corresponding fixed assembly positions 2. Then, the front and rear beams 81, 82 are placed on the corresponding movable assembly positions 4, and the ends of the beams are pre-positioned by the first clamping blocks 42 and the second clamping blocks 43, so that the front and rear beams 81, 82 can be stably positioned at the corresponding movable assembly positions 4, and further, the beams can be stably loaded on the corresponding slide-in platforms 61. At this moment, each sliding cylinder 62 is started, each sliding platform 61 is driven by the corresponding sliding cylinder 62 to drive the corresponding cross beam to move towards the corresponding longitudinal beam, when the corresponding cross beam slides to the splicing part with the corresponding longitudinal beam, the middle part of each cross beam and the splicing part of each cross beam and the longitudinal beam are positioned through the second positioning assembly 5, each self-locking cylinder 71 is started, each lock pin 711 is downwards inserted into the corresponding self-locking hole 12, so that the sliding platform 61 is locked on the workbench 1, the influence of tension rebound generated by welding heat on the sliding cylinders 62 is avoided, and meanwhile, the influence of deformation of parts due to heat concentration in the welding process is effectively avoided.

Claims (9)

1. A positioning and assembling tool for an auxiliary frame comprises a workbench (1) and is characterized in that,

the fixed assembling positions (2) are respectively arranged at the left side and the right side of the workbench (1) and are respectively used for loading left longitudinal beams (83) and right longitudinal beams (84);

the first positioning assemblies (3) are respectively arranged on the left side and the right side of the workbench (1) and are respectively used for positioning the longitudinal beams on the fixed assembly positions (2);

the movable assembling positions (4) are respectively arranged at the front side and the rear side of the workbench (1) and are respectively used for loading the front cross beam (81) and the rear cross beam (82);

the second positioning assemblies (5) are respectively arranged on the front side and the rear side of the workbench (1) and are respectively used for fixing the cross beams on the movable assembly positions (4);

the sliding structures (6) are respectively arranged on the front side and the rear side of the workbench (1), each sliding structure (6) is provided with a sliding platform (61) and a sliding cylinder (62) arranged on the sliding platform (61), each movable assembly position (4) is respectively arranged on the corresponding sliding platform (61), and each sliding cylinder (62) can drive the corresponding sliding platform (61) to enable each cross beam to be fed to the splicing part of the corresponding longitudinal beam in a sliding manner; and

and the self-locking structures (7) are respectively arranged on the front side and the rear side of the workbench (1) and are respectively used for locking the corresponding sliding platform (61) and the workbench (1).

2. The auxiliary frame positioning and assembling tool as claimed in claim 1, wherein each sliding structure further comprises a sliding component (63), the sliding component (63) comprises a sliding rail (631) fixed at the bottom of the sliding platform (61) along the front-back direction and a sliding bar (632) fixed on the table top (10) of the workbench (1), each sliding bar (632) is embedded in the sliding rail (631) and can slide along the sliding rail (631) front-back,

the cylinder seat (621) used for installing the sliding cylinder (62) is fixed to the inner side end of the sliding platform (61) respectively, the cylinder seat (621) is bent and comprises a horizontal vertical plate (6212) arranged on a transverse plate (6211) and a vertical plate (6212) arranged vertically, the vertical plate (6212) is located on the inner side of the corresponding transverse plate (6211), the sliding cylinder (62) is fixed to the transverse plate (6211), and a piston rod of the sliding cylinder (62) can act on the vertical plate (6212).

3. The auxiliary frame positioning and assembling tool according to claim 1, wherein each sliding platform (61) extends along the left and right directions of the workbench (1), each movable assembling position (4) is respectively arranged at the left and right ends of the corresponding sliding platform (61) and corresponds to the left and right ends of the corresponding cross beam, each movable assembling position (4) comprises a first placing block (41), a first clamping block (42) and a second clamping block (43) which are fixed on the table top (10) of the sliding platform (61), wherein the first placing block (41) can abut against the bottom surface of the corresponding end of the corresponding cross beam, and the first clamping block (42) and the second clamping block (43) can be clamped on the front and rear side surfaces of the corresponding end of the corresponding cross beam.

4. The auxiliary frame positioning and assembling tool according to claim 1, wherein each sliding platform (61) is further provided with a first positioning cylinder (44), a piston rod of each first positioning cylinder (44) is fixed with a vertically extending positioning pin (441), and each positioning pin (441) can be inserted into a first positioning hole (85) at the bottom of the corresponding cross beam.

5. The auxiliary frame positioning and assembling tool according to claim 1, wherein each second positioning assembly (5) comprises a first pressing cylinder (51) and a second pressing cylinder (52), wherein the number of the first pressing cylinders (51) is two, the first pressing cylinders (51) are respectively arranged at the outer sides of the corresponding movable assembling positions (4), a piston rod of each first pressing cylinder (51) is fixed with a first pressing head (511) which is used for pressing the top surface of the corresponding end of the corresponding cross beam from top to bottom,

the number of the second pressing cylinders (52) is two, each second pressing cylinder (52) is located on the inner side of each cross beam and each longitudinal beam under the loading state of each cross beam and each longitudinal beam, a first connecting block (521) is fixed on a piston rod of each second pressing cylinder (52), a second pressing head (522) and a third pressing head (523) are fixed on each first connecting block (521), wherein the second pressing head (522) is used for pressing the splicing position of each cross beam and the corresponding longitudinal beam from top to bottom, the third pressing head (523) is used for pressing the top surface of the corresponding cross beam from top to bottom, and each third pressing head (523) is located on the inner side of the corresponding second pressing head (522).

6. The auxiliary frame positioning and assembling tool for the auxiliary frame according to claim 1, wherein each fixed assembling position (2) comprises a second placing block (21) and a third clamping block (22) which are respectively fixed on the workbench (1), the second placing block (21) can abut against the bottom surface of the middle portion of the corresponding longitudinal beam, the third clamping blocks (22) are four and are arranged in pairs left and right, and each third clamping block (22) can abut against the corresponding side surface of the corresponding longitudinal beam.

7. The auxiliary frame positioning and assembling tool according to claim 1, wherein the first positioning assembly (3) comprises a third pressing cylinder (31) and a second positioning cylinder (32), a connecting frame (311) is fixed on a piston rod of the third pressing cylinder (31), a fourth pressing head (312) is connected to the connecting frame (311), the fourth pressing head (312) can be pressed on the top surface of the middle portion of the corresponding longitudinal beam from top to bottom, a positioning sleeve (321) vertically penetrating the middle portion of the corresponding longitudinal beam is fixed on a piston rod of the second positioning cylinder (32), and the second positioning cylinder (32) is located at the bottom of the corresponding longitudinal beam.

8. The auxiliary frame positioning and assembling tool according to claim 7, wherein each positioning sleeve (321) is obliquely inserted into the corresponding longitudinal beam, and the upper end of each positioning sleeve (321) is connected with the connecting frame (311) through a second connecting block (322).

9. The auxiliary frame positioning and assembling tool according to any one of claims 1 to 8, wherein each self-locking structure (7) comprises a self-locking cylinder (71) and a self-locking hole (12), each self-locking cylinder (71) vertically penetrates through a corresponding sliding platform (61), a piston rod of each self-locking cylinder (71) is fixedly provided with a self-locking pin (711), each self-locking pin (711) is located below the corresponding sliding platform (61), and each self-locking hole (12) is formed in a table top (10) of a workbench (1) and is used for the self-locking pin (711) to be inserted.

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