CN110280957B - Square tube welding fixture - Google Patents
Square tube welding fixture Download PDFInfo
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- CN110280957B CN110280957B CN201910704362.1A CN201910704362A CN110280957B CN 110280957 B CN110280957 B CN 110280957B CN 201910704362 A CN201910704362 A CN 201910704362A CN 110280957 B CN110280957 B CN 110280957B
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- 238000003466 welding Methods 0.000 title claims abstract description 62
- 230000002093 peripheral effect Effects 0.000 claims abstract description 17
- 230000000694 effects Effects 0.000 description 15
- 230000003028 elevating effect Effects 0.000 description 12
- 210000000078 claw Anatomy 0.000 description 4
- 238000010030 laminating Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000013519 translation Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention provides a square tube welding fixture, and belongs to the technical field of welding fixtures. The technical problem that the applicability of the existing square tube welding machine is poor is solved. The pipe welding fixture comprises a machine base, wherein a clamping jaw part used for clamping the outer side wall of a vertical square pipe is arranged on the machine base, a push-pull rod which extends vertically and can move vertically relative to the machine base is further arranged on the machine base, a supporting pipe used for positioning and sleeving the square pipe is sleeved on the periphery of the push-pull rod, the lower end of the supporting pipe is fixedly connected with the machine base, a plurality of dovetail grooves extending along the vertical inclination are formed in the peripheral surface of the push-pull rod, a plurality of jacking blocks are in sliding fit in the dovetail grooves, the outer ends of the jacking blocks penetrate through and extend out of the side wall of the supporting pipe, and when the push-pull rod moves vertically, the jacking blocks can be driven to slide outwards along the horizontal direction relative to the supporting pipe and lean against the inner side wall of the corresponding square pipe. The invention can form stable and effective clamping and positioning aiming at square pipes with different specifications and sizes, and has strong applicability.
Description
Technical Field
The invention belongs to the technical field of welding clamps, and relates to a square tube welding clamp.
Background
At present, the welding of the square tube and the square tube cover plate is finished by adopting the manual operation of argon arc welding without filling wires, and as the product has special requirements on concentricity of the square tube and the square tube cover plate, the efficiency is low and the quality is not ensured by adopting a welding and correcting mode at present. The quality and the production efficiency are greatly improved by adopting a self-centering automatic clamping fixture and a robot welding technology at present.
If the Chinese patent with the bulletin number of CN204997249U discloses a square tube welding machine, which comprises a base, a square tube fixing device, a square tube rotating device and at least one group of square tube welding devices, wherein the square tube rotating device is arranged on the base, a rotating platform for placing a flange is arranged at the upper end of the square tube rotating device, the square tube is fixed through the square tube fixing device, the lower end of the square tube is in butt joint with the flange, the square tube welding device is arranged on the side surface of the rotating platform through a translation device, a welding gun is configured at the joint of the welding gun and the square tube as well as the flange, and the welding of the square tube and the flange can be completed through the cooperation of the translation device and the square tube rotating device.
The automatic welding of side's pipe and flange can be realized to above-mentioned structure, but its centre gripping positioner can only be directed against the side's pipe product of fixed specification, can not satisfy the welding demand of different side's pipe types and placement condition, and the suitability is poor. In order to solve the problem of clamping applicability in the art, the clamping range is often enlarged, for example, the clamping mode and direction of the positioning block are changed or a multi-stage step clamping groove is arranged at the bottom of the upper pressing table, so that the clamping size range is improved.
Disclosure of Invention
The invention provides a square tube welding fixture aiming at the problems existing in the prior art, and aims to solve the technical problems that: how to improve the applicability of the welding of the square tube.
The aim of the invention can be achieved by the following technical scheme:
The utility model provides a square pipe welding jig, includes the frame, be equipped with the claw portion that is used for the vertical side's of centre gripping lateral wall of side on the frame, its characterized in that still is equipped with vertical extension and the push-and-pull rod that can relative frame vertical motion on the frame, the peripheral cover of push-and-pull rod is equipped with the stay tube that is used for square pipe position sleeve to establish, the lower extreme of stay tube with the frame links firmly, and the outer peripheral face of this push-and-pull rod has a plurality of dovetail that extend along vertical slope, a plurality of equal sliding fit has the top support piece in the dovetail, the outer end of top support piece runs through and stretches out the lateral wall of stay tube can drive when the push-and-pull rod vertical motion the relative stay tube of top support piece is along horizontal direction outwards slip and with the side's of corresponding side's pipe inside wall top and lean on.
When the square tube is welded with the square tube cover plate, the square tube is vertically arranged on the machine base, the clamping jaw part clamps the square tube from outside to enable the clamping jaw part to keep stable relative positions with the square tube cover plate, and then welding gun equipment accurately welds the positioned square tube and the square tube cover plate to realize welding processing. Through setting up the vertical push-pull rod that can move relatively frame vertically on the frame, establish the stay tube in the peripheral cover of push-pull rod, the top supporting shoe that stretches out the stay tube is connected in the dovetail that push-pull rod outer peripheral set up in the sliding connection, the stay tube can carry out preliminary location to the square pipe, avoid square pipe to receive external force upset before the centre gripping, when control push-pull rod vertical motion, the top supporting shoe receives the component of horizontal direction and the spacing effect of stay tube can gradually outwards move, like this the top supporting shoe can form the top with the inside wall of square pipe and lean on, can cooperate each other from inside and outside both sides to form the location centre gripping to the square pipe of outside clamping jaw portion simultaneously, can both form stable effectual centre gripping location through controlling the stroke of push-pull rod to the square pipe of different specification sizes, improve welding jig's suitability.
In the square pipe welding fixture, the supporting block comprises a sliding block and a top plate, the sliding block is in sliding fit with the dovetail groove, one side of the top plate is detachably connected with the sliding block, and the other side of the top plate can be attached to the inner side wall of the square pipe to be propped against. Through setting up the top support piece and including slider and roof, and make roof and slider for dismantling the cooperation, can select the roof assembly to the slider of corresponding size to the side's of different specification sizes like this to guarantee to fix a position the centre gripping effect, further improve the suitability.
In the square tube welding fixture, the clamping jaw part comprises two clamping heads capable of horizontally moving in opposite directions, right-angle clamping grooves are formed in opposite sides of the clamping heads, inner side walls of the right-angle clamping grooves can be abutted against two side walls adjacent to the periphery of the square tube, and the height positions of the clamping heads correspond to the height positions of the jacking blocks. Through setting up clamping jaw portion including two just and can follow the chuck of horizontal direction opposite movement to set up on the chuck can with the right angle complex right angle draw-in groove of side pipe, like this after accomplishing the centre gripping the lateral wall of two right angle draw-in grooves can be respectively with four sides laminating supports of side pipe periphery, guarantee the centre gripping effect, set up the high position of chuck and the high position of top support piece corresponding, the clamping force of both sides can be acted on the same section of side pipe like this, sets up like this in this section welded side pipe apron concentricity higher.
As another scheme, the clamping jaw part comprises two clamping heads capable of horizontally and oppositely moving, the clamping head comprises a clamping block I, a clamping block II and a driving arm capable of horizontally moving, the clamping block I is provided with an inclined plane I, the clamping block II is provided with an inclined plane II, the clamping block I on any clamping head is opposite to the clamping block II on the other clamping head along the moving direction of the clamping head, the clamping block I is fixedly connected with the driving arm, a plurality of guide shafts extending along the moving direction are fixedly connected to the driving arm, the clamping block II is slidably connected with the guide shafts, the periphery of the guide shafts is sleeved with pressure springs, two ends of each pressure springs are respectively propped against the driving arm and the clamping block II, and right-angle clamping grooves used for being abutted to two adjacent side walls of the periphery of the square tube can be formed between the inclined planes I and the inclined plane II when the square tube is clamped. For some square tubes with larger specification and size, the angle of the square tube is not completely matched with the angle of the chuck or the top support block after being sleeved on the periphery of the support tube, even the angle which is close to 45 degrees is known to be formed, so that when the chuck and the top support block clamp the square tube under the influence of certain friction force, the inner side wall and the outer side wall of the square tube are respectively in line contact with the chuck and the top support block, the whole clamping state of the square tube is unstable, and a welding gun is difficult to position; the clamping head comprises a clamping block I, a clamping block II and a driving arm capable of moving along the horizontal direction, the clamping block I is fixedly connected with the driving arm, the clamping block II is in sliding connection with the driving arm through a guide shaft, a pressure spring capable of controlling the clamping block II is sleeved on the periphery of the guide shaft, the clamping block I and the clamping block II on the clamping head are respectively opposite to the clamping block II and the clamping block I on the other clamping head along the horizontal direction, so that the clamping block II can exceed a certain distance relative to the clamping block I under the action of the pressure spring in an initial state, even if the situation occurs in the initial square tube placement angle, when the clamping head approaches the square tube, the inclined surface II on the clamping block II is firstly contacted with one edge of the square tube, and the edge corresponding to the inclined surface I on the square tube is not contacted with the inclined surface I, so that the square tube gradually rotates due to different loads on two sides, the fact that the pressure spring is compressed in place finally, the inclined surface I and the inclined surface II are respectively attached to two sides adjacent to the square tube, the two clamping blocks act on the two side edges together, further ensures that the square tube rotates and is adjusted, and the square tube can be placed at any angle, and the effective positioning and the applicability can be improved.
In the square pipe welding fixture, the bottom of the right-angle clamping groove is provided with a vertically extending abdication groove. Through the groove of stepping down that sets up vertical extension in the bottom of right angle draw-in groove, the groove of stepping down can provide the groove of stepping down for the right angle edge of side pipe like this to improve the laminating effect of the inside wall of right angle draw-in groove and side's pipe lateral wall.
In the square pipe welding fixture, the upper end face of the supporting pipe is provided with a positioning pin for positioning the square pipe cover plate. Through set up the locating pin at the upper end terminal surface of stay tube, offer the locating hole in the side pipe apron center before the welding like this and can cooperate with the locating pin and realize the spacing of side pipe apron to make side pipe apron and the position of side pipe relatively stable, guarantee the welding effect.
In the square pipe welding fixture, the lifting table for supporting the square pipe is sleeved on the periphery of the supporting pipe, the lifting table can slide up and down along the supporting pipe, the positioning bolts extending along the radial direction are inserted into the outer peripheral surface of the lifting table in a threaded manner, and the inner ends of the positioning bolts can be propped against the outer side wall of the supporting pipe. Through the peripheral cover at the stay tube establishes the elevating platform that can reciprocate, the lower extreme of side pipe can support on the elevating platform to set up positioning bolt at the outer peripheral face of elevating platform, can be through adjusting the position of elevating platform to the side pipe of different length like this and realize welding operation in the most suitable position, further improve the suitability.
In the square pipe welding fixture, the machine base is provided with the jacking table, the jacking table is provided with the telescopic arm capable of moving vertically, and the telescopic arm is connected with the pressing head capable of vertically facing the supporting pipe. Through set up the roof platform on the frame to but set up vertical motion's flexible arm on the roof platform, and connect the pressure head that is vertical just right with the stay tube on flexible arm, after square pipe apron installation, the pressure head roof is pressed to square pipe apron surface when steerable flexible arm downward movement makes its position stable, thereby guarantees welding effect and suitability.
In the square tube welding fixture, the lower end of the pressure head is in a horn shape, and the lower end face of the pressure head is provided with a positioning groove for accommodating the positioning pin. The lower end of the pressing head is in a horn shape, so that the acting range of the pressing head and the square tube cover plate can be improved, the pressing effect is improved, and the positioning groove is formed in the lower end face of the pressing head, so that the positioning pin and the pressing head can be prevented from interfering, and the pressing effect is guaranteed.
In the square pipe welding fixture, the jacking table is connected with the machine base in a sliding mode along the horizontal direction. Through setting up the roof-hold-down table and can slide along the horizontal direction on the frame, the telescopic boom lifts the short distance earlier after the welding is accomplished like this, then roof-hold-down table can realize the smooth and easy unloading of square pipe at certain distance of horizontal migration, and the design length overlength of telescopic boom makes overall structure compact inadequately when avoiding unloading.
Compared with the prior art, the invention has the following advantages:
1. The square pipe welding fixture is characterized in that the vertical push-pull rod capable of vertically moving relative to the machine base is arranged on the machine base, the support pipe is sleeved on the periphery of the push-pull rod, the supporting block extending out of the support pipe is connected in a sliding manner in the dovetail groove arranged on the peripheral surface of the push-pull rod, the support pipe can be positioned preliminarily, the square pipe is prevented from being overturned by external force before clamping, when the push-pull rod is controlled to vertically move, the supporting block is subjected to horizontal component force and the limiting effect of the support pipe and can gradually move outwards, so that the supporting block can be propped against the inner side wall of the square pipe, and meanwhile, the supporting block can be matched with the clamping jaw parts on the outer side to form positioning clamping with the square pipe on the inner side and the outer side, and stable and effective clamping positioning can be formed by controlling the stroke of the push-pull rod aiming at square pipes with different specifications and sizes, so that the applicability of the welding fixture is improved.
2. This side pipe welding jig establishes through the cover at the periphery of stay tube and can reciprocate the gliding elevating platform, and the lower extreme of side pipe can support on the elevating platform to set up positioning bolt at the outer peripheral face of elevating platform, can be its welding operation in the most suitable position through adjusting the position of elevating platform to the side pipe of different length like this, further improves the suitability.
Drawings
Fig. 1 is a schematic perspective view illustrating an operation state of the embodiment.
Fig. 2 is a schematic perspective view of the first embodiment.
Fig. 3 is an enlarged view of a portion a in fig. 2.
Fig. 4 is a schematic cross-sectional structure of the first embodiment.
FIG. 5 is a schematic block diagram of a support tube and push-pull rod mating assembly.
FIG. 6 is a schematic block diagram of a push-pull rod assembly.
Fig. 7 is an enlarged view of a portion B in fig. 6.
Fig. 8 is a schematic perspective view of the second embodiment.
Fig. 9 is an enlarged view of a portion C in fig. 8.
Fig. 10 is a schematic partial perspective view of a chuck in the second embodiment.
Fig. 11 is a schematic view showing a partial sectional structure of a chuck in the second embodiment.
In the figure, 1, a stand; 2. a clamping claw part;
3. a push-pull rod; 31. a dovetail groove;
4. a support tube; 41. a positioning pin;
5. A top support block; 51. a slide block; 52. a top plate;
6. A chuck; 61. a right-angle clamping groove; 62. clamping block I; 621. an inclined plane I; 63. clamping blocks II; 631. a second inclined plane; 64. a driving arm; 641. a guide shaft; 65. a pressure spring; 66. a relief groove;
7. A lifting table; 71. positioning bolts;
8. A jacking table; 81. a telescoping arm; 82. a pressure head; 821. and a positioning groove.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
Embodiment one:
As shown in fig. 1-7, the pipe welding fixture comprises a machine base 1, wherein a clamping jaw part 2 for clamping the outer side wall of a vertical square pipe is arranged on the machine base 1, a push-pull rod 3 which extends vertically and can move vertically relative to the machine base 1 is further arranged on the machine base 1, a supporting pipe 4 for square pipe positioning sleeve is sleeved on the periphery of the push-pull rod 3, the lower end of the supporting pipe 4 is fixedly connected with the machine base 1, a plurality of dovetail grooves 31 extending along the vertical inclination are formed in the outer peripheral surface of the push-pull rod 3, a top supporting block 5 is slidably matched in the plurality of dovetail grooves 31, the outer end of the top supporting block 5 penetrates through and extends out of the side wall of the supporting pipe 4, and when the push-pull rod 3 moves vertically, the top supporting block 5 can be driven to slide outwards along the horizontal direction relative to the supporting pipe 4 and propped against the inner side wall of the corresponding square pipe. When the square tube is welded with the square tube cover plate, the square tube is vertically arranged on the machine base 1, the clamping jaw part 2 clamps the square tube from outside to enable the relative position of the clamping jaw part to be kept stable with the square tube cover plate, and then the welding gun equipment accurately welds the positioned square tube and the square tube cover plate to realize welding processing. through arranging the vertical push-pull rod 3 which can vertically move relative to the machine base 1 on the machine base 1, the push-pull rod 3 can be driven by driving sources such as a commercially available cylinder, and the like, a supporting tube 4 is sleeved on the periphery of the push-pull rod 3, a supporting block 5 which extends out of the supporting tube 4 is connected in a sliding manner in a dovetail groove 31 arranged on the outer peripheral surface of the push-pull rod 3, the supporting tube 4 can be positioned preliminarily, the square tube is prevented from being overturned by external force before clamping, when the push-pull rod 3 is controlled to vertically move, the supporting block 5 can gradually move outwards under the action of component force in the horizontal direction and limit of the supporting tube 4, thus the supporting block 5 can be propped against the inner side wall of the square tube, and can be matched with the clamping jaw part 2 at the outer side to form positioning clamping with the square tube from the inner side and the outer side, The square pipes with different specifications and sizes can be stably and effectively clamped and positioned by controlling the stroke of the push-pull rod 3, and the applicability of the welding fixture is improved. Further, the top support block 5 comprises a sliding block 51 and a top plate 52, the sliding block 51 is in sliding fit with the dovetail groove 31, one side of the top plate 52 is detachably connected with the sliding block 51, and the other side of the top plate 52 can be attached to and abutted against the inner side wall of the square tube. Through setting up top stay piece 5 including slider 51 and roof 52, and make roof 52 and slider 51 be detachable cooperation, can select the roof 52 of corresponding size to the square pipe of different specification sizes to assemble to slider 51 like this to guarantee location centre gripping effect, further improve the suitability. The clamping claw part 2 comprises two clamping heads 6 which can horizontally move in opposite directions, the clamping heads 6 can be driven by a commercially available cylinder, right-angle clamping grooves 61 are formed in opposite sides of the two clamping heads 6, inner side walls of the right-angle clamping grooves 61 can be abutted against two side walls adjacent to the periphery of the square tube, and the height positions of the clamping heads 6 correspond to the height positions of the jacking blocks 5. Through setting up collet portion 2 including two just and can follow chuck 6 of horizontal direction opposite movement to set up on chuck 6 can with square pipe's right angle complex right angle draw-in groove 61, like this after accomplishing the centre gripping the lateral wall of two right angle draw-in grooves 61 can laminate the support with square pipe periphery's four sides respectively, guarantee the centre gripping effect, set up the high position of chuck 6 and the high position of jack-up piece 5 corresponding, the clamping force of both sides can act on the same section of square pipe like this on, set up in this section welded square pipe apron concentricity higher like this. Preferably, the bottom of the right angle slot 61 has a vertically extending relief slot 66. Through set up the groove 66 of stepping down of vertical extension in the bottom of right angle draw-in groove 61, the groove 66 of stepping down can provide the groove of stepping down for the right angle edge of side pipe like this to improve the laminating effect of the inside wall of right angle draw-in groove 61 and side's pipe lateral wall. The upper end face of the support pipe 4 has a positioning pin 41 for positioning the square pipe cover plate. Through set up locating pin 41 at the upper end terminal surface of stay tube 4, offer the locating hole in the welding front side pipe apron center like this and can cooperate with locating pin 41 and realize the spacing of side pipe apron to make side pipe apron and the position of side pipe relatively stable, guarantee the welding effect.
As shown in fig. 1,2 and 4, the outer periphery of the support tube 4 is sleeved with a lifting table 7 for supporting the square tube, the lifting table 7 can slide up and down along the support tube 4, the outer peripheral surface of the lifting table 7 is in threaded connection and is provided with a positioning bolt 71 extending along the radial direction, and the inner end of the positioning bolt 71 can be propped against the outer side wall of the support tube 4. Through the peripheral cover at stay tube 4 establishes slidable elevating platform 7 from top to bottom, the lower extreme of side pipe can support on elevating platform 7 to set up positioning bolt 71 at elevating platform 7's outer peripheral face, can be through adjusting elevating platform 7's position to the square pipe of different length so it realizes welding operation in the most suitable position, further improves the suitability.
As shown in fig. 1, 2 and 4, a pressing table 8 is arranged on the machine base 1, a telescopic arm 81 capable of moving vertically is arranged on the pressing table 8, and a pressing head 82 capable of vertically facing the support tube 4 is connected to the telescopic arm 81. Through set up roof bench 8 on frame 1 to but set up vertical movable's flexible arm 81 on roof bench 8, and connect the pressure head 82 that is just right with stay tube 4 is vertical on flexible arm 81, after square pipe apron installation like this, pressure head 82 roof pressure makes its position stable to square pipe apron surface when steerable flexible arm 81 moves down, thereby guarantees welding effect and suitability. Further, the lower end of the ram 82 is horn-shaped, and the lower end surface of the ram 82 has a positioning groove 821 for accommodating the positioning pin 41. The lower end of the pressing head 82 is in a horn shape, so that the acting range of the pressing head 82 and the square tube cover plate can be improved, the pressing effect is improved, and the positioning groove 821 is formed in the lower end face of the pressing head 82, so that the positioning pin 41 and the pressing head 82 can be prevented from interfering, and the pressing effect is guaranteed. The top pressing table 8 is connected with the machine base 1 in a sliding way along the horizontal direction. Can follow horizontal direction through setting up roof pressure platform 8 and slide on frame 1, roof pressure platform 8 accessible cylinder etc. commercial driving source drives, and telescopic boom 81 lifts the short distance earlier after the welding is accomplished like this, then roof pressure platform 8 can realize the smooth and easy unloading of square pipe at the certain distance of horizontal migration, avoids the design length overlength of telescopic boom 81 to make overall structure compact inadequately when unloading.
Embodiment two:
As shown in fig. 8 to 11, this embodiment is substantially the same as the first embodiment except that: the clamping claw 2 comprises two clamping heads 6 capable of horizontally and oppositely moving, each clamping head 6 comprises a clamping block I62, a clamping block II 63 and a driving arm 64 capable of horizontally moving, the clamping block I62 is provided with a bevel I621, the clamping block II 63 is provided with a bevel II 631, the clamping block I62 on any clamping head 6 is opposite to the clamping block II 63 on the other clamping head 6 along the moving direction, the clamping block I62 is fixedly connected with the driving arm 64, the driving arm 64 is fixedly connected with a plurality of guide shafts 641 extending along the moving direction, the clamping block II 63 is in sliding connection with the guide shafts 641, the periphery of the guide shafts 641 is sleeved with pressure springs 65, two ends of each pressure springs 65 respectively propped against the driving arm 64 and the clamping block II 63, and right-angle clamping grooves 61 can be formed between the bevel I621 and the bevel II 631 when square pipes are clamped. For some square tubes with larger specification and size, the angle of the square tube is not completely matched with the angle of the clamping head 6 or the supporting block 5 after the square tube is sleeved on the periphery of the supporting tube 4, even the angle which is close to 45 degrees can be known to be formed, so that when the clamping head 6 and the supporting block 5 clamp the square tube under the influence of certain friction force, the inner side wall and the outer side wall of the square tube respectively form line contact with the clamping head 6 and the supporting block 5, the whole clamping state of the square tube is unstable, and the welding gun is difficult to position; the clamping head 6 comprises a clamping block I62, a clamping block II 63 and a driving arm 64 capable of moving along the horizontal direction, the clamping block I62 is fixedly connected with the driving arm 64, the clamping block II 63 is in sliding connection with the driving arm 64 through a guide shaft 641, a pressure spring 65 capable of controlling the position of the clamping block II 63 is sleeved on the periphery of the guide shaft 641, the clamping block I62 and the clamping block II 63 on the clamping head 6 are respectively opposite to the clamping block II 63 and the clamping block I62 on the other clamping head 6 along the horizontal direction, so that in an initial state, the clamping block II 63 can exceed a certain distance relative to the clamping block I62 under the action of the pressure spring 65, even if the situation of the placement angle of an initial square pipe appears, when the clamping head 6 approaches to the square pipe, the inclined surface II 631 on the square pipe contacts with one edge of the square pipe, and the inclined surface II 631 on the square pipe does not contact with the inclined surface I621, so that due to the fact that loads on two sides are different, the square pipe gradually rotates, the pressure spring 65 is compressed to the position, the inclined surface I and the inclined surface II 631 are respectively kept away from the two sides adjacent to the square pipe, the two sides of the square pipe are respectively, the two square pipe can be placed together, the two square pipe can be smoothly and the two square pipe can be placed together, and the clamping efficiency can be adjusted, and the positioning performance can be further realized. Preferably, the first and second clamping blocks 62 and 63 are each a piece of thermally conductive material.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (7)
1. The square tube welding fixture comprises a machine base (1), wherein the machine base (1) is provided with a clamping jaw part (2) for clamping the outer side wall of a vertical square tube, the welding fixture is characterized in that the machine base (1) is also provided with a push-pull rod (3) which extends vertically and can move vertically relative to the machine base (1), the periphery of the push-pull rod (3) is sleeved with a supporting tube (4) for square tube positioning sleeve, the lower end of the supporting tube (4) is fixedly connected with the machine base (1), the outer peripheral surface of the push-pull rod (3) is provided with a plurality of dovetail grooves (31) which extend vertically in an inclined manner, the plurality of dovetail grooves (31) are internally provided with a jacking block (5) in a sliding fit manner, the outer end of the jacking block (5) penetrates through and stretches out of the side wall of the supporting tube (4), when the push-pull rod (3) moves vertically, the jacking block (5) can slide outwards along the horizontal direction relative to the supporting tube (4) and propped against the inner side wall of the corresponding square tube, the clamping jaw part (2) comprises two clamping jaws (6) which can move horizontally and oppositely, the clamping jaw part (6) comprises a first clamping jaw (62) and a second clamping jaw (63) which can move horizontally and a second clamping jaw (63) and a second clamping jaw (64), the clamping block I (62) on any clamping head (6) is opposite to the clamping block II (63) on the other clamping head (6) along the movement direction of the clamping head (6), the clamping block I (62) is fixedly connected with the driving arm (64), a plurality of guide shafts (641) extending along the movement direction are fixedly connected to the driving arm (64), the clamping block II (63) is slidably connected with the guide shafts (641), the periphery of the guide shafts (641) is sleeved with pressure springs (65) with two ends respectively propped against the driving arm (64) and the clamping block II (63), and right-angle clamping grooves (61) for being abutted against two adjacent side walls of the periphery of a square tube can be formed between the inclined plane I (621) and the inclined plane II (631) when the square tube is clamped.
2. The square tube welding fixture as claimed in claim 1, wherein the top support block (5) comprises a sliding block (51) and a top plate (52), the sliding block (51) is in sliding fit with the dovetail groove (31), one side of the top plate (52) is detachably connected with the sliding block (51), and the other side of the top plate (52) can be attached to and abutted against the inner side wall of the square tube.
3. The square tube welding jig according to claim 1 or 2, wherein the upper end face of the support tube (4) has a positioning pin (41) for positioning a square tube cover plate.
4. The square tube welding fixture as claimed in claim 1 or 2, wherein a lifting table (7) for supporting the square tube is sleeved on the periphery of the supporting tube (4), the lifting table (7) can slide up and down along the supporting tube (4), a positioning bolt (71) extending along the radial direction is inserted on the peripheral surface of the lifting table (7) in a threaded connection manner, and the inner end of the positioning bolt (71) can be propped against the outer side wall of the supporting tube (4).
5. A square pipe welding jig according to claim 3, wherein the machine base (1) is provided with a jacking table (8), the jacking table (8) is provided with a telescopic arm (81) capable of moving vertically, and the telescopic arm (81) is connected with a pressure head (82) capable of vertically facing the support pipe (4).
6. The square tube welding jig according to claim 5, wherein the lower end of the ram (82) is horn-shaped, and the lower end surface of the ram (82) has a positioning groove (821) for accommodating the positioning pin (41).
7. Square pipe welding jig according to claim 5, characterized in that the jacking table (8) is slidingly connected with the machine base (1) in horizontal direction.
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| CN201910704362.1A CN110280957B (en) | 2019-07-31 | 2019-07-31 | Square tube welding fixture |
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| CN201910704362.1A CN110280957B (en) | 2019-07-31 | 2019-07-31 | Square tube welding fixture |
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| CN110280957A CN110280957A (en) | 2019-09-27 |
| CN110280957B true CN110280957B (en) | 2024-08-27 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111151878B (en) * | 2020-03-18 | 2021-11-12 | 浙江双森金属科技股份有限公司 | Square tube welding equipment |
| CN113878284B (en) * | 2021-11-05 | 2024-08-30 | 苏州安嘉自动化设备有限公司 | Automatic assembling and welding system for table and chair frames |
| CN114289911B (en) * | 2021-12-31 | 2024-07-23 | 天津敏实汽车零部件有限公司 | Pipe fitting positioner and processing centre gripping frock |
| CN114700625B (en) * | 2022-06-06 | 2023-01-17 | 徐州清歌机械制造有限公司 | Self-positioning welding device for vegetable storage rack and using method of self-positioning welding device |
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