Tool clamp for splicing, welding and processing steel structure

Abstract

The invention belongs to the technical field of welding tool clamps, and particularly relates to a tool clamp for splicing, welding and machining a steel structure, the tool clamp comprises a base, a clamping mechanism and a supporting mechanism are movably arranged on the base, the clamping mechanism is used for clamping a thin-wall part in the steel structure, the supporting mechanism is used for placing a heavy part in the steel structure, and the clamping mechanism is used for clamping the thin-wall part in the steel structure. The preheating mechanism comprises a heat storage chamber and a plurality of air cylinder assemblies; the clamping plate is arranged in the heat storage chamber, when the clamping plate is attached to the thin-wall part for clamping, heat in the heat storage chamber is transmitted to the thin-wall part through the clamping plate to preheat the thin-wall part, meanwhile, hot air in the heat storage chamber slowly flows out through the pressure relief hole, the thin-wall part can be continuously preheated, the preheating effect is further improved, and meanwhile the heat storage effect is improved. And after the thin-wall part is preheated, thermal stress can be reduced, and the problems that the thin-wall part is prone to deformation during welding and clamping stability is affected are solved.

Description

Technical Field

[0001] The invention belongs to the field of welding fixtures, in particular to a fixture for steel structure splicing and welding. Background Art

[0002] Steel structure is a common type of building structure. Steel structure includes steel sections and steel plates. The various components in the steel structure are spliced ​​together by welding or riveting. When using welding methods, tooling fixtures are often required to assemble and position the steel structure workpieces. Thin metal is easy to process and form, and can be made into components of various shapes according to different design requirements. It is often used as a decorative material or enclosure structure and is widely used in steel structures.

[0003] A patent document with publication number CN116765721B discloses a tooling fixture for steel structure splicing and welding, including a tooling fixture main body, a pressing device and a flattening device. The U-shaped contact plate in the pressing device presses the steel structure thin plate to avoid the problem that the cross-sectional area between the steel structure thin plates is small, which makes the steel structure easy to move during the splicing process; the I-shaped roller in the flattening device rolls on the top surface of the steel structure thin plate to flatten the warped part to avoid warping between the steel structure thin plates, which causes the finished product after welding to bend.

[0004] The above solution still has some problems in practical application. A large amount of heat will be generated during the welding process. Due to the thin thickness of thin-walled metal parts, burn-through and deformation are prone to occur during welding, which may cause deformation of thin-walled metal parts or affect the stability of clamping. Therefore, the influence of welding heat should be considered during clamping, and appropriate measures should be taken to reduce thermal deformation. The above technical solution has not effectively solved this problem.

[0005] To this end, the present invention provides a tooling fixture for steel structure splicing and welding processing. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: the tooling fixture for steel structure splicing welding processing described in the present invention comprises a base, on which a clamping mechanism and a supporting mechanism are movably provided, the clamping mechanism is used to clamp thin-walled parts in the steel structure, the supporting mechanism is used to place heavy parts in the steel structure, and also comprises a preheating mechanism;

[0008] The preheating mechanism includes: a heat storage chamber arranged on the clamping mechanism, the opening of the heat storage chamber faces the thin-walled part, and a door panel for sealing and insulating is provided at the opening of the heat storage chamber; a plurality of groups of air cylinder assemblies, the air cylinder assemblies include a cylinder body connected to the heat storage chamber, a piston rod is movably inserted inside the cylinder body, and an air inlet is connected to the outside of the cylinder body, and the air inlet is close to the thin-walled part.

[0009] Preferably, the clamping mechanism includes: a first slide seat slidably arranged on the base; a first lifting seat movably inserted on the first slide seat; a rotating seat rotatably arranged on the top of the first lifting seat, and the heat storage chamber is fixedly connected to the rotating seat; a clamping plate movably inserted inside the heat storage chamber, and the clamping plate clamps the thin-walled part after moving to the outside of the heat storage chamber, and the clamping plate is a heat-conducting material, and a pressure relief hole is provided in the clamping plate.

[0010] Preferably, the clamping mechanism further includes: a connecting rod, through which the clamping plate is driven to move after the door panel is opened or closed; and a positioning member for positioning the door panel.

[0011] Preferably, the supporting mechanism includes: a second slide seat slidably arranged on the base; a second lifting seat movably inserted on the first slide seat; a support plate movably inserted on the top of the second lifting seat, and the support plate is used to place heavy objects; and a support spring arranged on the second lifting seat for pushing the support plate to move upward.

[0012] Preferably, it also includes a driving mechanism, which includes: a plurality of groups of spring assemblies arranged on the rotating seat; a convex rod fixedly connected to the eccentric position of the output end of the spring assembly, a slide groove fixedly connected to the piston rod, the convex rod is inserted into the slide groove, and after the output end of the spring assembly rotates, the piston rod is driven to reciprocate through the convex rod.

[0013] Preferably, the driving mechanism also includes: a transmission gear slidably arranged at the input end of the clockwork assembly; a reset spring arranged on the clockwork assembly for resetting the transmission gear; a first ratchet plate and a second ratchet plate slidably arranged on the rotating seat for driving the transmission gear to rotate unidirectionally; and a limit plate arranged on the base for limiting the first ratchet plate.

[0014] Preferably, the driving mechanism further comprises: a push plate slidably arranged on the first lifting seat, the push plate being provided with a U-shaped holder for pushing the second ratchet plate to move; a slide rail fixedly connected to the second slide seat, the end of the push plate being movably inserted into the slide rail.

[0015] Preferably, it also includes a release mechanism, which includes: a frame rotatably arranged on the base, the frame is coaxial with the rotating seat, and the rotating shaft of the rotating seat is slidably connected to the rotating shaft of the frame; a plurality of adjustment plates slidably arranged in the frame; a retaining ring fixedly connected to the transmission gear, the adjustment plate is inserted into the retaining ring, and after the adjustment plate moves, the transmission gear is driven to move through the retaining ring; a pressure plate slidably arranged in the frame, the bottom of the pressure plate is provided with an inclined plate for pushing the adjustment plate to move, and the inclined plate is a unidirectional rotating structure, after the pressure plate moves, it drives the plurality of adjustment plates and the transmission gear to move in turn, so that the transmission gear is separated from the first ratchet plate and the second ratchet plate.

[0016] Preferably, the release mechanism further comprises: two winding rollers rotatably arranged on the frame, the winding rollers being provided with a return torsion spring and a damping member; and a pull rope wound between the two winding rollers, the pull rope being fixedly connected to the pressure plate.

[0017] Preferably, the release mechanism further comprises: a rotating rod rotatably disposed on the base, wherein the rotating rod and the winding roller are transmitted via a universal joint; and a rack plate fixedly connected to the support plate, wherein the rack plate is meshingly connected to the rotating rod.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The tooling fixture for steel structure splicing and welding processing described in the present invention arranges a clamp in the heat storage chamber. When the clamp is fitted with the thin-walled part for clamping, the heat in the heat storage chamber is transferred to the thin-walled part through the clamp, so as to preheat the thin-walled part. At the same time, the hot air in the heat storage chamber slowly flows out through the pressure relief hole, which can not only continue to preheat the thin-walled part and further improve the preheating effect, but also play a pressure relief role in the heat storage chamber. After the thin-walled part is preheated, the thermal stress can be reduced, which improves the problem that the thin-walled part is easily deformed during welding and affects the clamping stability. The preheating work can be carried out during the clamping work, which saves the trouble of preheating the thin-walled part separately and improves the work efficiency.

[0020] 2. The tooling fixture for steel structure splicing and welding processing described in the present invention utilizes the movement of the first slide and the second slide when taking and placing the steel structure to tighten the clockwork assembly, thereby providing power for continuous air extraction and heat storage work, and utilizes the gravity of the steel structure to drive the pressure plate to move, so that the clockwork assembly automatically releases energy, and the heat storage chamber performs heat storage work automatically without manual operation, with a high degree of automation, eliminating the trouble of additionally setting up electric heating and electrical drive systems.

[0021] 3. The tooling fixture for steel structure splicing and welding processing described in the present invention arranges a heat storage chamber and an air cylinder assembly on a rotating seat, and the air inlet and the clamp move with the rotating seat. While the clamp clamps the thin-walled part, the air inlet is also close to the welding area in the thin-walled part so as to be closer to the hot air generated during welding. The hot air can be sucked into the heat storage chamber in time, which improves the problem that for different welding conditions, the air inlet may be far away from the welding position, and the hot air generated by welding is not sucked away in the first time, resulting in partial heat loss and reduced heat storage effect. It not only improves the heat storage effect, but also saves the trouble of adjusting the position of the air inlet separately, and is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Figure 1 is a front view of the first embodiment of the present invention;

[0024] Figure 2 This is a front view of the clamping state of the steel structure on the base of the present invention;

[0025] Figure 3 It is a side view of the clamping mechanism, preheating mechanism, driving mechanism and releasing mechanism;

[0026] Figure 4 It is an exploded view of the clamping mechanism;

[0027] Figure 5 It is an exploded diagram of the support mechanism;

[0028] Figure 6 It is a schematic diagram of a combination of a single clamping mechanism and a driving mechanism;

[0029] Figure 7 This is an exploded view of the heat storage chamber, the cylinder assembly, and the mainspring assembly;

[0030] Figure 8 It is an exploded view of the ratchet plate, adjustment plate and transmission gear;

[0031] Fig. 9 This is a side view of the matching structure of the push plate and the slide rail;

[0032] Fig.10 This is the front view of the frame, the pull rope and the rotating rod;

[0033] Fig.11 It is a side view of the reel, pull rope, rotating rod and rack plate.

[0034] In the figure: 1, base; 2, clamping mechanism; 21, first slide; 22, first lifting seat; 23, rotating seat; 24, clamping plate; 25, pressure relief hole; 26, connecting rod; 27, positioning member; 3, supporting mechanism; 31, second slide; 32, second lifting seat; 33, supporting plate; 34, supporting spring; 4, preheating mechanism; 41, heat storage chamber; 42, door panel; 43, cylinder; 44, piston rod; 45, inlet Air port; 5. Driving mechanism; 51. Spring assembly; 52. Protruding rod; 53. Transmission gear; 54. Reset spring; 55. First ratchet plate; 56. Second ratchet plate; 57. Limiting plate; 58. Push plate; 59. Slide rail; 6. Release mechanism; 61. Frame; 62. Adjusting plate; 63. Retaining ring; 64. Pressing plate; 65. Winding roller; 66. Pull rope; 67. Turning rod; 68. Universal joint; 69. Rack plate. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0036] Embodiment 1

[0037] like Figure 1-Figure 7 As shown, a tooling fixture for steel structure splicing and welding processing according to an embodiment of the present invention comprises a base 1, on which a clamping mechanism 2 and a supporting mechanism 3 are movably provided, wherein the clamping mechanism 2 is used to clamp thin-walled parts in the steel structure, and the supporting mechanism 3 is used to place heavy parts in the steel structure, and further comprises a preheating mechanism 4;

[0038] The preheating mechanism 4 includes: a heat storage chamber 41 arranged on the clamping mechanism 2, the opening of the heat storage chamber 41 faces the thin-walled part, and a door panel 42 for sealing and insulating is provided at the opening of the heat storage chamber 41; a plurality of groups of air cylinder assemblies, the air cylinder assemblies include a cylinder body 43 connected to the heat storage chamber 41, a piston rod 44 is movably inserted inside the cylinder body 43, and the cylinder body 43 is externally connected to an air inlet 45, and the air inlet 45 is close to the thin-walled part.

[0039] Specifically, the steel structure includes light-weight thin-walled parts and heavy-weight parts. The thin-walled parts are thin-skinned metals. The heat storage chamber 41 and the door panel 42 are both equipped with heat insulation devices. The number of clamping mechanisms 2 can be selected according to specific working conditions. The air cylinder assembly is an inflatable device. The clamping mechanism 2 can adopt existing clamping claws and other devices. The supporting mechanism 3 can adopt supporting platforms and other devices. The hot air stored in the heat storage chamber 41; when welding the steel structure with thin-walled parts, the heavy parts in the steel structure are placed on the supporting mechanism 3, and the thin-walled parts are placed on the heavy parts. After the thin-walled parts and the heavy parts are placed, the clamping mechanism 2 is started to press the thin-walled parts on the heavy parts so that the relative positions of the two remain fixed. At the same time, the heat storage chamber is adjusted. The positions of 41 and the air inlet 45 make the outlet of the heat storage chamber 41 and the air inlet 45 close to the thin-walled part; remove the door panel 42, and the hot air in the heat storage chamber 41 flows out to the outside, and the outflowing hot air preheats the thin-walled part, and then the connection between the thin-walled part and the heavy part can be welded; in the prior art, in order to improve the problem of thermal deformation during welding of thin-walled metal parts, a method of preheating the thin-walled metal parts in advance can be adopted. The tooling fixture preheats the thin-walled parts by setting the heat storage chamber 41, which can reduce thermal stress and improve the problem that the thin-walled parts are easily deformed during welding and affect the clamping stability. The preheating work can be performed during the clamping process, which saves the trouble of preheating the thin-walled parts separately and improves the work efficiency.

[0040] When manual welding or argon arc welding is used, a large amount of heat is generated during the welding process, which increases the air temperature around the connection between the thin-walled parts and the heavy parts. During the welding process, the piston rod 44 is started to reciprocate in the air cylinder to continuously perform exhaust work and draw hot air into the heat storage chamber 41, thereby replenishing the heat of the heat storage chamber 41 so as to preheat the thin-walled parts in the next group of steel structures. After the welding work is completed, the door panel 42 is closed to prevent the heat loss in the heat storage chamber 41. Such a cycle realizes the function of recovering the heat energy in the welding process and preheating the thin-walled parts before welding. Compared with the traditional electric heating preheating method, it saves the trouble of setting up an electric heating device, which not only helps to improve the welding quality, but also improves the problem of welding heat being wasted.

[0041] like Figure 1-Figure 5 As shown, the clamping mechanism 2 includes: a first slide seat 21 slidably arranged on the base 1; a first lifting seat 22 movably inserted on the first slide seat 21; a rotating seat 23 rotatably arranged on the top of the first lifting seat 22, and the heat storage chamber 41 is fixedly connected to the rotating seat 23; a clamping plate 24 movably inserted in the inside of the heat storage chamber 41, and the clamping plate 24 is moved to the outside of the heat storage chamber 41 to clamp the thin-walled part, and the clamping plate 24 is a heat-conducting material, and a pressure relief hole 25 is provided in the clamping plate 24.

[0042] Specifically, the first slide 21 can slide forward and backward, and the first lifting seat 22 can move up and down. The first slide 21, the first lifting seat 22 and the rotating seat 23 are all provided with self-locking devices; when the door panel 42 is closed, the clamping plate 24 shrinks inside the heat storage chamber 41, and the clamping plate 24 is heated; after the door panel 42 is opened and the clamping plate 24 is extended, a part of the clamping plate 24 moves to the outside of the heat storage chamber 41, and the other part of the clamping plate 24 is still inside the heat storage chamber 41. After the clamping plate 24 contacts the thin-walled part, the heat in the heat storage chamber 41 is transferred to the thin-walled part via the clamping plate 24. The thin-walled parts are preheated, and at the same time, the hot air inside the heat storage chamber 41 slowly flows outward through the pressure relief hole 25, which can not only continue to preheat the thin-walled parts and further improve the preheating effect, but also relieve the pressure of the heat storage chamber 41 so that hot air can continue to be input into the heat storage chamber 41 later; for steel structures of different types and sizes, the position of the thin-walled parts will be different, so the position of the clamping plate 24 will also change when clamping and fixing. Through this setting, the position of the clamping plate 24 can be adjusted to meet the clamping and positioning requirements of different steel structures during welding. For example, Figure 2 In the embodiment, the thin-walled part is placed at the upper left end of the heavy part. For different welding conditions, the clamping plate 24 can be clamped at the left side or the upper side of the thin-walled part.

[0043] It should be noted that, by designing the pressure relief hole 25 , the speed at which the heat in the heat storage chamber 41 flows out through the pressure relief hole 25 can be much lower than the speed at which the air cylinder assembly inputs heat into the heat storage chamber 41 .

[0044] like Figure 4-Figure 7 As shown, the clamping mechanism 2 further includes: a connecting rod 26 , which drives the clamping plate 24 to move after the door panel 42 is opened or closed; and a positioning member 27 for positioning the door panel 42 .

[0045] Specifically, the door panel 42 is hinged at the top of the heat storage chamber 41, one end of the connecting rod 26 is fixed to the door panel 42, and the other end of the connecting rod 26 is fixed to a round rod that is movably inserted into the inside of the clamping plate 24. After the door panel 42 rotates upward, the opening of the heat storage chamber 41 is opened, and the door panel 42 drives the clamping plate 24 to extend outward through the connecting rod 26, so that the clamping plate 24 can contact the steel structure. After the door panel 42 rotates downward, the clamping plate 24 is driven to shrink to the inside of the heat storage chamber 41 through the connecting rod 26, and the door panel 42 seals the opening of the heat storage chamber 41. The positioning member 27 can be a buckle or a latch structure. After the door panel 42 is opened or closed, the door panel 42 is fixed to the heat storage chamber 41 through the positioning member 27.

[0046] According to specific circumstances, a pushing spring for pushing the splint 24 outward may also be arranged inside the heat storage chamber 41. The positioning member 27 is a buckle fixed to the door panel 42. A card slot matching the buckle is provided on the outer wall of the heat storage chamber 41. After the door panel 42 is closed, it is fixed to the heat storage chamber 41 by the cooperation of the buckle and the card slot. After the door panel 42 is opened, the pushing spring pushes the splint 24 outward. When the splint 24 contacts the thin-walled part, the pushing spring can provide a clamping pushing force, so that the splint 24 positions the thin-walled part on the heavy part.

[0047] It should be noted that other structures that can drive the clamping plate 24 to reciprocate after the door panel 42 is opened and closed, and other structures that can keep the door panel 42 in a fixed position after opening and closing, are suitable for the manufacture of the clamping mechanism 2.

[0048] like Figure 1-Figure 11 As shown, the support mechanism 3 includes: a second slide 31 slidably arranged on the base 1; a second lifting seat 32 movably inserted on the first slide 21; a support plate 33 movably inserted on the top of the second lifting seat 32, and the support plate 33 is used to place heavy objects; and a support spring 34 arranged on the second lifting seat 32 for pushing the support plate 33 to move upward.

[0049] Specifically, the second slide 31 can slide left and right, and the second lifting seat 32 can move up and down. The second slide 31 and the second lifting seat 32 are both provided with a self-locking device.

[0050] It should be noted that a clamp for fixing the heavy component on the support plate 33 may be further provided on the base 1 or the second slide 31 to further improve the position stability of the heavy component on the support plate 33 .

[0051] like Figure 6-Figure 9 As shown, it also includes a driving mechanism 5, which includes: a plurality of groups of spring assemblies 51 arranged on the rotating seat 23; a protruding rod 52 fixedly connected to the eccentric position of the output end of the spring assembly 51, a slide groove fixedly connected to the piston rod 44, the protruding rod 52 is inserted into the slide groove, and after the output end of the spring assembly 51 rotates, the piston rod 44 is driven to reciprocate through the protruding rod 52.

[0052] Specifically, the output end of the clockwork assembly 51 is fixedly connected to a turntable, and the protruding rod 52 is arranged at an eccentric position of the turntable; after the clockwork assembly 51 releases energy, the output end drives the turntable to rotate, and during the rotation of the turntable, the piston rod 44 is driven by the protruding rod 52 to move back and forth in the cylinder 43, thereby continuously performing the pumping work.

[0053] like Figure 1-Figure 9As shown, the driving mechanism 5 also includes: a transmission gear 53 slidably arranged on the input end of the spring assembly 51; a reset spring 54 arranged on the spring assembly 51 to reset the transmission gear 53; a first ratchet plate 55 and a second ratchet plate 56 slidably arranged on the rotating seat 23 to drive the transmission gear 53 to rotate unidirectionally; and a limit plate 57 arranged on the base 1 to limit the first ratchet plate 55.

[0054] Specifically, the input end of the clockwork assembly 51 faces downward, and a step plate is provided at the bottom of the input end. The transmission gear 53 can move up and down relative to the input end. The reset spring 54 is used to push the transmission gear 53 to move up, and the upper and lower ends of the reset spring 54 are respectively connected to the transmission gear 53 and the step plate; initially, the transmission gear 53 is located at the top of its moving range and contacts both the first ratchet plate 55 and the second ratchet plate 56. When the ratchet plate contacts the transmission gear 53, the check function is also activated to prevent the transmission gear 53 from rotating, that is, to prevent the clockwork assembly 51 from rotating and releasing energy; the first ratchet plate 55 and the second ratchet plate 56 6 can rotate together with the rotating seat 23 in the longitudinal direction. The first ratchet plate 55 is provided with ratchets located on the left and right sides of the transmission gear 53 respectively, and the ratchets are distributed along the front-to-back direction. When the transmission gear 53 moves forward and backward relative to the first ratchet plate 55, the transmission gear 53 rotates unidirectionally to tighten the clockwork assembly 51; the limit plate 57 is used to prevent the first ratchet plate 55 from moving forward and backward. When the first slide seat 21 moves forward and backward, the transmission gear 53 moves forward and backward with the first slide seat 21 and the first ratchet plate 55 remains stationary in the front-to-back direction. Therefore, the transmission gear 53 rotates, thereby tightening the clockwork assembly 51.

[0055] When welding thin-walled parts along the front-to-back direction, the clamping plate 24 may cover the position to be welded in the thin-walled parts. Therefore, during the welding process, the first slide 21 needs to be moved forward and backward to expose the welding area. In addition, for thin-walled parts of different lengths, the first slide 21 needs to be moved forward and backward to adjust the clamping position of the clamping plate 24 on the thin-walled parts; when the first slide 21 moves forward and backward, the transmission gear 53 and the first ratchet plate 55 produce relative displacement, the transmission gear 53 rotates, and the clockwork assembly 51 is tightened.

[0056] like Figure 1-Figure 9 As shown, the driving mechanism 5 also includes: a push plate 58 slidably arranged on the first lifting seat 22, and a U-shaped holder is provided on the push plate 58 for pushing the second ratchet plate 56 to move; a slide rail 59 fixedly connected to the second slide seat 31, and the end of the push plate 58 is movably inserted into the slide rail 59.

[0057] Specifically, the second ratchet plate 56 is provided with ratchets respectively located on the front and rear sides of the transmission gear 53, and the ratchets are distributed in the left and right directions. When the second ratchet plate 56 moves left and right, it drives the transmission gear 53 to rotate unidirectionally, thereby tightening the clockwork assembly 51; the push plate 58 can move left and right relative to the first lifting seat 22, and the push plate 58 can move forward and backward relative to the second slide seat 31. After the first slide seat 21 moves forward and backward, when the second slide seat 31 moves left and right, the second ratchet plate 56 can be driven to move left and right through the slide rail 59 and the push plate 58. After the second ratchet plate 56 moves left and right, it drives the transmission gear 53 to rotate, thereby tightening the clockwork assembly 51; by providing the push plate 58, after the second ratchet plate 56 rotates with the rotating seat 23, the second slide seat 31 that moves left and right can always drive the second ratchet plate 56 to move.

[0058] Initially, the second slide 31 is located at the right end of its moving range, and the second slide 31 is away from the first slide 21, so that the thin-walled part can be placed on the heavy part and the welded steel structure can be taken out. Before welding, after the thin-walled part and the steel structure are placed on the support plate 33, the second slide 31 is moved to the left so that the thin-walled part is close to the clamping plate 24 so that the clamping plate 24 can clamp the thin-walled part. When the second slide 31 moves left and right, it drives the second ratchet plate 56 to move to tighten the clockwork assembly 51.

[0059] Embodiment 2

[0060] like Figure 1-Figure 10 As shown, compared with Example 1, another embodiment of the present invention is: it also includes a release mechanism 6, the release mechanism 6 includes: a frame 61 rotatably arranged on the base 1, the frame 61 is coaxial with the rotating seat 23, and the rotating shaft of the rotating seat 23 is slidably connected to the rotating shaft of the frame 61; a plurality of adjustment plates 62 slidably arranged in the frame 61; a retaining ring 63 fixedly connected to the transmission gear 53, the adjustment plate 62 is inserted into the retaining ring 63, and after the adjustment plate 62 moves, the transmission gear 53 is driven to move through the retaining ring 63; a pressing plate 64 slidably arranged in the frame 61, and the bottom of the pressing plate 64 is provided with an inclined plate for pushing the adjustment plate 62 to move, and the inclined plate is a unidirectional rotating structure. After the pressing plate 64 moves, it drives the plurality of adjustment plates 62 and the transmission gear 53 to move in turn, so that the transmission gear 53 is separated from the first ratchet plate 55 and the second ratchet plate 56.

[0061] Specifically, the rotating seat 23 is always connected to the frame 61 when it moves forward and backward, and after the rotating seat 23 rotates, it drives the frame 61 to rotate synchronously, the adjusting plate 62 and the retaining ring 63 move up and down synchronously, and the adjusting plates 62 in the multiple groups of clamping mechanisms 2 are arranged side by side in the front and rear directions. After moving from front to back, the pressure plate 64 can drive several adjusting plates 62 to move downward in sequence, so that several transmission gears 53 are separated from the ratchet plate in sequence, the output ends of several clockwork assemblies 51 rotate in sequence, and several air cylinder assemblies perform suction and heat storage work in sequence. Through this arrangement, the simultaneous release of energy by multiple clockwork assemblies 51 is avoided, so that multiple air cylinder assemblies can only be pumped at the same time in a short period of time, thereby extending the heat storage time and further improving the heat storage effect.

[0062] like Figure 3-Figure 11 As shown, the release mechanism 6 also includes: two winding rollers 65 rotatably arranged on the frame 61 , on which a return torsion spring and a damping member are arranged; and a pull rope 66 wound between the two winding rollers 65 , the pull rope 66 being fixedly connected to the pressure plate 64 .

[0063] Specifically, two ends of the pull rope 66 are respectively fixed to two winding rollers 65 . After the winding rollers 65 rotate, the pull rope 66 drives the pressure plate 64 to move back and forth in the front-rear direction.

[0064] like Figure 3-Figure 11 As shown, the release mechanism 6 also includes: a rotating rod 67 rotatably arranged on the base 1, and the rotating rod 67 and the winding roller 65 are transmitted through a universal joint 68; a rack plate 69 fixedly connected to the support plate 33, and the rack plate 69 is meshedly connected with the rotating rod 67.

[0065] Specifically, a gear part matching the rack plate 69 is fixedly connected to the rotating rod 67. After the heavy object is placed on the support plate 33, the heavy object squeezes the support plate 33 to move downward. During the downward movement of the support plate 33, when the rack plate 69 contacts the rotating rod 67, the rack plate 69 drives the rotating rod 67 to rotate, and the rotating rod 67 drives the winding roller 65 to rotate through the universal joint 68, thereby driving the pressure plate 64 to move from the back to the front, so that the pressure plate 64 moves to the front. After the support plate 33 moves down to the bottom, the rack plate 69 and the rotating rod 67 are separated from the upper and lower parts, and the winding roller 65 rotates under the action of the reset torsion spring. After the winding roller 65 rotates, it drives the pressure plate 64 to move from the front to the back, and the pressure plate 64 drives several adjustment plates 62 to move downward in sequence.

[0066] It should be noted that the teeth on the rack plate 69 are preferably but not limited to ratchet teeth that drive the rotating rod 67 to rotate unidirectionally; a damping member may also be provided at the rotating position of the rotating rod 67 or the winding roller 65 to slow down the rotation speed of the winding roller 65, so that the pressure plate 64 moves slowly from front to back, extending the time for the pressure plate 64 to drive the single adjustment plate 62 and the transmission gear 53 to move downward, and providing more time for the clockwork assembly 51 to release energy to drive the air cylinder assembly to pump air.

[0067] Working principle: When welding a steel structure with thin-walled parts, move the second slide 31 to the left to make the thin-walled parts close to the first slide 21, move the first slide 21 forward and backward to adjust the fitting position of the clamping plate 24 and the thin-walled parts, put the thin-walled parts on the weight, and then put the weight with the thin-walled parts on the support plate 33. The weight squeezes the support plate 33 to move downward. During the downward movement of the support plate 33, when the rack plate 69 contacts the rotating rod 67, the rack plate 69 drives the rotating rod 67 to rotate, and the rotating rod 67 drives the winding roller 65 to rotate through the universal joint 68, thereby driving the pressure plate 64 to move from the back to the front, so that the pressure plate 64 moves to the front.

[0068] The door panel 42 is rotated upward to open. After the door panel 42 is opened, the connecting rod 26 drives the clamping plate 24 to extend to the outside of the heat storage chamber 41, and the second sliding seat 31 is continuously moved to the left or the rotating seat 23 is rotated so that the clamping plate 24 fits the thin-walled part and clamps the thin-walled part on the heavy part. After the clamping plate 24 contacts the thin-walled part, the heat in the heat storage chamber 41 is transferred to the thin-walled part via the clamping plate 24 to preheat the thin-walled part. At the same time, the hot air inside the heat storage chamber 41 slowly flows outward via the pressure relief hole 25, which can continue to preheat the thin-walled part and further improve the preheating effect. In addition, the heat storage chamber 41 has a pressure relief effect. After the thin-walled part is preheated, the thermal stress can be reduced, which improves the problem that the thin-walled part is easily deformed during welding and affects the clamping stability.

[0069] Then the connection between the thin-walled part and the heavy part can be welded;

[0070] During the movement of the first slide 21 and the second slide 31 , the first ratchet plate 55 and the second ratchet plate 56 are always in contact with the transmission gear 53 , and the ratchet plate and the transmission gear 53 generate relative motion, driving the transmission gear 53 to rotate and tighten the clockwork assembly 51 ;

[0071] After the heavy-piece squeezing support plate 33 moves down to the bottom, the rack plate 69 and the rotating rod 67 separate up and down, and the winding roller 65 rotates under the action of the reset torsion spring. After the winding roller 65 rotates, it drives the pressure plate 64 to move from front to back, and the pressure plate 64 drives a number of adjustment plates 62 to move down in sequence. The adjustment plate 62 drives the transmission gear 53 to move down, so that the transmission gear 53 is separated from the ratchet plate, and the ratchet plate loses its non-return restraint. The clockwork assembly 51 releases energy and drives the piston rod 44 to move back and forth in the cylinder 43 through the convex rod 52. The gas cylinder assembly continuously performs the exhaust work, and the hot gas generated during welding is sucked into the heat storage chamber 41, realizing the function of recovering the heat energy in the welding process and replenishing the heat energy into the heat storage chamber 41;

[0072] After the pressure plate 64 is separated from the adjustment plate 62, the adjustment plate 62 and the transmission gear 53 are moved upward and reset under the push of the reset spring 54, and the transmission gear 53 contacts the ratchet plate again;

[0073] After welding is completed, the second slide 31 is moved to the right so that the welded steel structure can be removed from the support plate 33, and then the door panel 42 is closed to allow the splint 24 to shrink into the heat storage chamber 41. This can prevent heat loss in the heat storage chamber 41 and avoid the problem of the high-temperature splint 24 being exposed to the outside and easily scalding the staff, making it safer to use.

[0074] When the fixture is in use, the movement of the first slide 21 and the second slide 31 when taking and placing the steel structure is used to tighten the clockwork assembly 51, providing power for the continuous air extraction and heat storage work, and the gravity of the steel structure is used to drive the pressure plate 64 to move, so that the clockwork assembly 51 automatically releases energy, and the heat storage work of the heat storage chamber 41 is automatically carried out without manual operation, with a high degree of automation, eliminating the trouble of additionally setting up electric heating and electrical drive systems; the heat storage chamber 41 and the air cylinder assembly are arranged on the rotating seat 23, and the air inlet 45 and the clamping plate 24 are arranged on the rotating seat 23. They all move with the rotating seat 23. When the clamp 24 clamps the thin-walled part, the air inlet 45 is also close to the welding area in the thin-walled part, so as to be closer to the hot air generated during welding. The hot air can be sucked into the heat storage chamber 41 in time, which improves the problem that for different welding conditions, the air inlet 45 may be far away from the welding position, and the hot air generated by the welding is not sucked away in the first time, resulting in partial heat loss and reduced heat storage effect. This not only improves the heat storage effect, but also saves the trouble of adjusting the position of the air inlet 45, making it more convenient to use.

[0075] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A fixture for steel structure splicing and welding, comprising a base (1), on which a clamping mechanism (2) and a supporting mechanism (3) are movably provided, wherein the clamping mechanism (2) is used to clamp thin-walled parts in the steel structure, and the supporting mechanism (3) is used to place heavy parts in the steel structure, and is characterized in that: Also includes a preheating mechanism (4); The preheating mechanism (4) comprises: A heat storage chamber (41) is provided on the clamping mechanism (2), the opening of the heat storage chamber (41) faces the thin-walled member, and a door panel (42) for sealing and heat insulation is provided at the opening of the heat storage chamber (41); A plurality of groups of gas cylinder assemblies, each gas cylinder assembly comprising a cylinder (43) connected to the heat storage chamber (41), a piston rod (44) movably inserted inside the cylinder (43), an air inlet (45) externally connected to the cylinder (43), and the air inlet (45) close to the thin-walled part.

2. The tooling fixture for steel structure splicing and welding according to claim 1 is characterized in that: The clamping mechanism (2) comprises: A first sliding seat (21) slidably arranged on the base (1); A first lifting seat (22) movably plugged onto the first sliding seat (21); Rotating a rotating seat (23) disposed on the top of the first lifting seat (22), wherein the heat storage chamber (41) is fixedly connected to the rotating seat (23); A clamping plate (24) is movably inserted into the heat storage chamber (41), and after the clamping plate (24) moves to the outside of the heat storage chamber (41), it clamps the thin-walled part. The clamping plate (24) is made of heat-conducting material, and a pressure relief hole (25) is provided in the clamping plate (24).

3. The tooling fixture for steel structure splicing and welding according to claim 2 is characterized in that: The clamping mechanism (2) further comprises: A connecting rod (26), wherein the clamping plate (24) is driven to move by the connecting rod (26) when the door panel (42) is opened or closed; A positioning member (27) for positioning the door panel (42).

4. The fixture for steel structure splicing and welding according to claim 3 is characterized in that: The supporting mechanism (3) comprises: A second sliding seat (31) slidably arranged on the base (1); A second lifting seat (32) movably plugged onto the first sliding seat (21); A support plate (33) movably plugged into the top of the second lifting seat (32), wherein the support plate (33) is used to place heavy objects; A support spring (34) is provided on the second lifting seat (32) and is used to push the support plate (33) upward.

5. The fixture for steel structure splicing and welding according to claim 4 is characterized in that: It also includes a driving mechanism (5), wherein the driving mechanism (5) includes: A plurality of groups of spring assemblies (51) arranged on the rotating seat (23); A protruding rod (52) is fixedly connected to an eccentric position of the output end of the clockwork assembly (51); a sliding groove is fixedly connected to the piston rod (44); the protruding rod (52) is inserted into the sliding groove; after the output end of the clockwork assembly (51) rotates, the piston rod (44) is driven to reciprocate through the protruding rod (52).

6. The fixture for steel structure splicing and welding according to claim 5 is characterized in that: The driving mechanism (5) further comprises: A transmission gear (53) slidably disposed at the input end of the clockwork assembly (51); a reset spring (54) provided on the clockwork assembly (51) for resetting the transmission gear (53); A first ratchet plate (55) and a second ratchet plate (56) slidably disposed on the rotating seat (23) and used to drive the transmission gear (53) to rotate in one direction; A limiting plate (57) is provided on the base (1) for limiting the position of the first ratchet plate (55).

7. The fixture for steel structure splicing and welding according to claim 6 is characterized in that: The driving mechanism (5) further comprises: A push plate (58) slidably disposed on the first lifting seat (22), wherein the push plate (58) is provided with a U-shaped holder for pushing the second ratchet plate (56) to move; A slide rail (59) is fixedly connected to the second slide seat (31), and the end of the push plate (58) is movably inserted into the slide rail (59).

8. The fixture for steel structure splicing and welding according to claim 7 is characterized in that: It also includes a release mechanism (6), the release mechanism (6) comprising: Rotating a frame (61) disposed on the base (1), wherein the frame (61) is coaxial with the rotating seat (23), and the rotating shaft of the rotating seat (23) is slidably connected to the rotating shaft of the frame (61); A plurality of adjustment plates (62) slidably arranged in the frame (61); a snap ring (63) fixedly connected to the transmission gear (53), the adjustment plate (62) being inserted into the snap ring (63), and the adjustment plate (62) driving the transmission gear (53) to move through the snap ring (63); A pressure plate (64) is slidably arranged in the frame (61), and a slanted plate for pushing the adjustment plate (62) to move is arranged at the bottom of the pressure plate (64), and the slanted plate is a one-way rotating structure. After the pressure plate (64) moves, it drives a plurality of the adjustment plates (62) and the transmission gear (53) to move in turn, so that the transmission gear (53) is separated from the first ratchet plate (55) and the second ratchet plate (56).

9. The fixture for steel structure splicing and welding according to claim 8 is characterized in that: The release mechanism (6) further comprises: two winding rollers (65) rotatably arranged on the frame (61), wherein the winding rollers (65) are provided with a return torsion spring and a damping member; A pull rope (66) is wound between the two winding rollers (65), and the pull rope (66) is fixedly connected to the pressure plate (64).

10. A fixture for steel structure splicing and welding according to claim 9, characterized in that: The release mechanism (6) further comprises: Rotating a rotating rod (67) disposed on the base (1), wherein transmission is performed between the rotating rod (67) and the winding roller (65) via a universal joint (68); A rack plate (69) is fixedly connected to the support plate (33), and the rack plate (69) is meshingly connected to the rotating rod (67).

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