Tailor-welding tool and tailor-welding method for arm beam of hooklift

Abstract

The invention discloses a hooklift arm beam tailor-welding tool and tailor-welding method, and relates to the technical field of welding assistion.The hooklift arm beam tailor-welding tool comprises a tailor-welding workbench, a vertical arm body, a horizontal arm body and a welding clamp component, and the top of the tailor-welding workbench is fixedly connected with a supporting plate. During use, a driving motor drives a clamping side plate to fix a vertical arm body and a horizontal arm body, meanwhile, a sliding rod and a clamping top plate are matched to achieve all-directional clamping, resist residual stress in welding cooling, keep the shape and size of a pull arm and improve the percent of pass, when clamping is nearly completed, gears are meshed through a translation plate and a connecting rod, and the clamping effect is improved. The eccentric ring groove is matched with the supporting cylinder to collide and vibrate the welding position, residual stress is redistributed and released, the production cycle is shortened, the strength and stability of the pull arm are improved, in addition, through the matching of the third connecting rod and the sliding block, slag, oxide skin and the like on the surface of a weld joint are cleaned before vibration, stress concentration and crack propagation are avoided, and the welding quality is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of welding assistance, in particular to a welding tool and a welding method for a boom truck boom beam. Background Art

[0002] A hook truck, also known as a hook-arm garbage truck, is a commonly used vehicle with a detachable carriage. Its main components include a frame, a subframe installed on the frame, an arm frame installed on the subframe, and an arm installed on the arm frame. The arm is driven by an arm cylinder when working. Its appearance is L-shaped, with a hook at the upper end for hooking a garbage collection box, and a hinged connection with the arm cylinder at the lower part, which can automatically load and unload the garbage collection box. The quality requirements in its processing and production are also very high. Ensuring the verticality, parallelism and coaxiality of the middle arm within a larger stroke is an important guarantee for the reliable operation of the hook truck.

[0003] The main components of the pulling arm include a horizontal arm and a vertical arm. At present, the welding method of the pulling arm is mainly that the staff places the pulling arm components on the welding workbench, and the pneumatic clamps respectively clamp and fix the components of the pulling arm, and then weld them together manually or by welding robot arms in steps. When the weld of the component is cooled after welding, the tensile stress generated by the weld cooling and shrinkage will cause pulling on the component. Therefore, for the pulling arm, the key is to prevent it from twisting and deforming during the welding cooling process, which will cause the problem of insufficient verticality between the vertical arm and the horizontal arm of the pulling arm or tilting of the upper end. Rigid fixation is usually used in the industry to prevent deformation.

[0004] However, traditional welding fixtures often use a simple two-side clamping method when clamping workpieces, which has poor anti-deformation ability. In addition, residual stress will still be generated due to local high-temperature expansion and cooling contraction during the welding process, resulting in stress accumulation. This residual stress is difficult to dissipate quickly under ordinary clamping, which may cause uncontrollable secondary deformation, thereby affecting the quality of the finished product of the pull arm. Summary of the invention

[0005] The object of the present invention is to provide a welding fixture and welding method for a boom truck arm beam to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides a welding tool for a boom truck arm beam, comprising a welding workbench, a vertical arm body, a horizontal arm body, and a welding fixture component, wherein a support plate is fixedly connected to the top of the welding workbench, and the welding fixture component is arranged on the top of the welding workbench;

[0007] The top of the tailor-made welding workbench is provided with a clamping and flipping mechanism, so that when the welding is cooled, the top of the vertical arm body can be pressed down and clamped synchronously during the clamping process on both sides;

[0008] The top of the tailor-made welding workbench is provided with an extended vibration mechanism, so that when the welding is cooled, the welding position of the clamped arm can be immediately subjected to collision vibration after the clamping of the arm is completed;

[0009] The outer walls on both sides of the support plate are provided with welding slag scraping mechanisms so that when welding is cooled, the welding slag can be cleaned from the vibration position before each vibration.

[0010] Preferably, the clamping and flipping mechanism includes a clamping side plate, the same side wall of the two clamping side plates is fixedly connected to a connecting plate, and a driving rod is arranged inside the two connecting plates, a driving motor is fixedly installed on the top of the welding workbench, and the output shaft at one end of the driving motor is fixedly connected to one end of the driving rod, the top of the welding workbench is fixedly connected to a support seat 1, and the driving rod is rotatably connected to one side outer wall of the support seat 1 with one end away from the driving motor, and a sliding groove 1 is penetrated through the outer wall of the side where the two clamping side plates are close to each other, and a sliding rod is slidably connected to the inner wall of the sliding groove 1, a groove 1 is opened on the top of the two clamping side plates, and a clamping top plate is arranged on the inner wall of the groove 1, the inside of the clamping top plate is fixedly connected with an axle rod, and the two ends of the axle rod pass through the inner wall of the groove 1 and extend to the outside of the clamping side plate, and the outer walls of the two extended ends of the axle rod are fixedly connected to a rotating frame.

[0011] Preferably, the outer walls on both sides of the sliding rod are fixedly connected with an L-shaped rod, a sliding groove 2 is provided at the bottom of the rotating frame corresponding to the L-shaped rod, and the outer wall of the L-shaped rod slides in fit with the inner wall of the sliding groove 2, the outer walls on both sides of the L-shaped rod are fixedly connected with an axle column, sliding groove 3 is provided on the outer walls on both sides of the rotating frame corresponding to the axle column, and the outer wall of the axle column slides in fit with the inner wall of the sliding groove 3, and the outer walls of the two extended ends of the axle rod are fitted with return torsion springs, the ends of the return torsion springs that are close to each other are overlapped on the outer walls of both sides of the clamping side plates, and the ends of the two return torsion springs that are far away are overlapped on the outer wall of the axle rod.

[0012] Preferably, the outer wall of the driving rod is symmetrically threadedly connected with a threaded sleeve, the interiors of the two connecting plates are provided with rotation grooves corresponding to the threaded sleeves, and the outer wall of the threaded sleeve is rotatably connected to the inner wall of the rotation groove, the outer wall of the threaded sleeve is equidistantly fixedly connected with tooth block one, the inner wall of the rotation groove is equidistantly fixedly connected with tooth block two corresponding to tooth block one, both tooth block one and tooth block two are made of rubber, the bottoms of the two connecting plates are slidably connected to the top of the welding workbench, the outer wall threads of the driving rod are oppositely arranged corresponding to the two threaded sleeves, and the center of the outer wall of the driving rod is fixedly connected with an active gear corresponding to the expansion vibration mechanism.

[0013] Preferably, the extended vibration mechanism includes a translation plate, the bottoms of the two translation plates are slidably connected to the top of the welding workbench, the bottoms of the two translation plates are fixedly connected to a limiting block, the top of the welding workbench is provided with a limiting groove corresponding to the limiting block, and the outer wall of the limiting block is fitted and slidably matched with the inner wall of the limiting groove, the limiting block is in an inverted T shape, the same side wall of the two translation plates is hinged with a connecting rod 1, the same side wall of the two connecting rods 1 is hinged with a connecting rod 2, the close end portions of the two connecting rods 2 are rotatably connected with a rotating rod, and the outer wall of the rotating rod is fixedly connected with a driven gear corresponding to the driving gear.

[0014] The cam is annularly fixed on the outer wall of the support plate, and the cam is provided with a support cylinder at two ends, and the outer wall of the support cylinder corresponds to the support plate. The inner wall of the support plate is fitted with the outer wall of the limit groove for sliding engagement with the outer wall of the limit groove. The inner wall of the support cylinder is fitted with a sliding column for sliding engagement, and the outer wall of the sliding column is fixedly connected to a connecting frame at two ends away from the support cylinder and is slidably connected to the inner wall of the eccentric ring groove. The outer wall of the sliding column is equidistantly provided with a groove two, and the inner wall of the groove two is fixedly connected with a spring one, and the other end of the spring one is fixedly connected with a clamping block, and the inner wall of the support cylinder corresponds to the clamping block and is equidistantly provided with a clamping groove, and the clamping block is truncated toward one end of the clamping groove. The clamping block forms a telescopic structure with the groove two through the spring one, and the outer wall of the side where the two limit blocks are close to each other is fixedly connected with a spring two, and the ends of the two springs close to each other are fixedly connected to the inner wall of the limit groove.

[0015] Preferably, the welding slag scraping mechanism includes a U-shaped frame, and the ends of the two U-shaped frames that are close to each other are fixedly connected to the outer walls of both sides of the support plate, and the inner walls of the two U-shaped frames facing the vertical arm body are provided with movable grooves, and the inner walls of the movable grooves are slidably connected with sliders, and the ends of the two sliders that are close to each other are fixedly connected with scrapers, and the outer walls of the two sliders that are away from the vertical arm body are hinged with connecting rods three, and the other ends of the two connecting rods three are hinged to the outer walls of both sides of the support tube.

[0016] Preferably, the inner wall of the movable groove is symmetrically provided with sliding grooves four, the upper and lower side walls of the sliding block are fixedly connected with anti-slip blocks corresponding to the sliding grooves four, and the outer wall of the anti-slip block is slidably connected to the inner wall of the sliding groove four.

[0017] A welding method for a boom truck arm beam welding tool comprises the following steps:

[0018] S1: Clamping and flipping: During the clamping process on both sides, two slide bars can be used to contact and press the two sides of the pull arm in advance, so that the slide bars can drive the rotating frame to move in a circle through the cooperation of the shaft column and the slide slot three, and drive the clamping top plate to flip, so that the top of the vertical arm body can be pressed down and clamped;

[0019] S2: Delayed vibration: When the clamping of both sides is completed, the driving gear will mesh with the driven gear, so that the sliding column can move forward and backward through the cooperation of the connecting frame and the eccentric ring groove. At this time, the cooperation of some clamping blocks and the clamping groove can still drive the support cylinder to move forward and backward, so that the welding position of the clamped arm can be immediately vibrated by collision when the clamping is completed through the cooperation of the eccentric ring groove and the support cylinder, so that the residual stress can be redistributed and released;

[0020] S3: Pre-slag removal: Before the support tube collides and vibrates, the anti-slip block and the slide groove four can be used to cooperate with the two connecting rods three to drive the two combined scrapers to scrape and clean the vibration position in advance. After scraping, the stress can be evenly transmitted, the stress relief effect is improved, and the subsequent welding quality of this welding fixture is guaranteed.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. When the welding fixture is in use, the two clamping side plates can be driven by the driving motor to clamp and fix the two sides of the vertical arm body and the horizontal arm body. At the same time, during the clamping process, the slide rod and the clamping top plate can cooperate to realize the synchronous driving of the clamping top plate to flip during the clamping process on both sides, so that the top of the vertical arm body can be pressed down and clamped, forming an all-round constraint on the pulling arm. This multi-dimensional clamping method can better resist the residual stress generated during the welding cooling process, effectively reduce the distortion of the pulling arm due to stress accumulation, so that the pulling arm can maintain its original shape and size during the welding cooling process, and improve the qualified rate of the finished product.

[0023] 2. When the welding fixture is in use, the two translation plates can be squeezed synchronously when the clamping is nearly completed, so that the driven gear and the driving gear can be meshed with each other through the cooperation of the connecting rod 1 and the connecting rod 2, so that when the clamping is completed, the welding position of the pull arm in the clamped state can be immediately subjected to collision vibration through the cooperation of the eccentric ring groove and the support tube. These vibration waves will disturb the microstructure inside the pull arm, so that the residual stress can be redistributed and released, and the welded parts can reach a stable state faster, thereby shortening the production cycle. The stress distribution inside the pull arm will become more uniform, which helps to reduce the occurrence of stress concentration and improve the overall strength and stability of the pull arm.

[0024] 3. When the welding fixture is in use, the connection rod 3 can cooperate with the slider to scrape and clean the vibration position before each vibration to avoid the slag, oxide scale and other hard residues on the weld surface from forming local stress concentration points, which may cause crack expansion during vibration. After scraping, the stress can be evenly transmitted to improve the stress relief effect. At the same time, it can prevent impurities from being embedded in the weld due to vibration to form inclusions or pores, thereby ensuring the subsequent welding quality of the welding fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is the welding cooling flow chart of the present invention;

[0026] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 3 It is a structural schematic diagram of the first part of the clamping and flipping mechanism of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the second part of the clamping and flipping mechanism of the present invention;

[0029] Figure 5 It is a structural schematic diagram of the third part of the clamping and flipping mechanism of the present invention;

[0030] Figure 6 It is a structural schematic diagram of the first part of the extended vibration mechanism of the present invention;

[0031] Figure 7 It is a structural schematic diagram of the second part of the extended vibration mechanism of the present invention;

[0032] Figure 8 For the present invention Figure 7 The enlarged structural diagram at A in the middle;

[0033] Fig. 9 It is a structural schematic diagram of the welding slag scraping mechanism of the present invention.

[0034] In the figure: 1, welding workbench; 2, vertical arm body; 3, horizontal arm body; 4, welding fixture parts; 5, support plate; 9, limit groove; 6, clamping and flipping mechanism; 601, clamping side plate; 602, connecting plate; 603, driving rod; 604, driving motor; 605, support seat 1; 606, slide groove 1; 607, slide rod; 608, groove 1; 609, clamping top plate; 610, shaft rod; 611, rotating frame; 612, L-shaped rod; 613, slide groove 2; 614, shaft column; 615, slide groove 3; 616, reset torsion spring; 617, threaded sleeve; 618, rotating groove; 619, tooth block 1; 620 , tooth block two; 621, driving gear; 7, extended vibration mechanism; 701, translation plate; 702, limit block; 703, connecting rod one; 704, connecting rod two; 705, rotating rod; 706, driven gear; 707, eccentric ring groove; 708, supporting cylinder; 709, limiting groove; 710, sliding column; 711, connecting frame; 712, groove two; 713, spring one; 714, clamping block; 715, clamping groove; 716, spring two; 8, welding slag scraping mechanism; 801, U-shaped frame; 802, movable groove; 803, sliding block; 804, scraper; 805, connecting rod three; 806, anti-dropping block; 807, slide groove four. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] For example, see Figure 1-Figure 9 The present invention provides a welding tool for a boom truck arm beam, comprising a welding workbench 1, a vertical arm body 2, a horizontal arm body 3, and a welding fixture component 4. A support plate 5 is fixedly connected to the top of the welding workbench 1, and the welding fixture component 4 is arranged on the top of the welding workbench 1;

[0037] A clamping and flipping mechanism 6 is provided on the top of the welding workbench 1;

[0038] Further, the clamping and flipping mechanism 6 includes a clamping side plate 601, the same side walls of the two clamping side plates 601 are fixedly connected with a connecting plate 602, the two connecting plates 602 are provided with a driving rod 603 inside, a driving motor 604 is fixedly installed on the top of the welding workbench 1, and an output shaft at one end of the driving motor 604 is fixedly connected to one end of the driving rod 603, a support seat 605 is fixedly connected to the top of the welding workbench 1, and one end of the driving rod 603 away from the driving motor 604 is rotatably connected to one side outer wall of the support seat 605;

[0039] More specifically, in this embodiment, the welding workbench 1 is first divided into two parts, one side is a welding processing area, and the other side is a welding cooling area. When welding the vertical arm body 2 and the horizontal arm body 3, they are first placed in the welding processing area and clamped by the welding fixture component 4, so that they can be welded and connected step by step by manual or welding robot arms. After welding is completed, they are transferred to the welding cooling area for cooling so that the welding processing area can continue to process;

[0040] When cooling and fixing after welding, the same side wall of the two clamping side plates 601 is fixedly connected with a connecting plate 602, and the two connecting plates 602 are provided with a driving rod 603 inside. The output shaft at one end of the driving motor 604 is fixedly connected to one end of the driving rod 603, and the top of the tailor-made welding workbench 1 is fixedly connected with a supporting seat 1 605, and one end of the driving rod 603 away from the driving motor 604 is rotatably connected to the outer wall of one side of the supporting seat 1 605, so that the driving rod 603 can be driven to rotate by the driving motor 604;

[0041] Then, the outer wall of the driving rod 603 is symmetrically threadedly connected with a threaded sleeve 617, and the two connecting plates 602 are provided with a rotation groove 618 corresponding to the threaded sleeve 617, and the outer wall of the threaded sleeve 617 is rotatably connected to the inner wall of the rotation groove 618, and the outer wall of the threaded sleeve 617 is equidistantly fixedly connected with a tooth block 1 619, and the inner wall of the rotation groove 618 is equidistantly fixedly connected with a tooth block 2 620 corresponding to the tooth block 1 619, so that when the driving rod 603 rotates, the threaded sleeve 617 can be driven to rotate synchronously. At this time, when the tooth block 1 619 and the tooth block When the two gears 620 are in meshing state, the gear block 620 can limit the gear block 1 619, thereby limiting the rotation of the threaded sleeve 617. Then, when the threaded sleeve 617 cannot rotate, the connecting plate 602 can be driven to move by the outer wall thread of the driving rod 603. Then, the bottom of the two connecting plates 602 are slidably connected to the top of the welding workbench 1, and the outer wall thread of the driving rod 603 is oppositely arranged to the two threaded sleeves 617, so that the two clamping side plates 601 can be driven to move and clamp the two sides of the pulling arm through the setting of the opposite threads.

[0042] Then, in the process of clamping on both sides, the inner wall of the slide groove 1 606 is fitted and slidably connected with the slide rod 607, and the outer walls on both sides of the slide rod 607 are fixedly connected with the L-shaped rod 612, and the bottom of the rotating frame 611 is provided with a slide groove 2 613 corresponding to the L-shaped rod 612, and at the same time, the outer wall of the L-shaped rod 612 is fitted and slid with the inner wall of the slide groove 2 613, and the outer walls on both sides of the L-shaped rod 612 are fixedly connected with the shaft column 614, and the outer walls on both sides of the rotating frame 611 are provided with a slide groove 3 615 corresponding to the shaft column 614, and at the same time, the outer wall of the shaft column 614 is fitted and slid with the inner wall of the slide groove 3 615, so that the two slide rods 607 can contact and press the two sides of the pulling arm in advance, so that the slide rod 607 can drive the rotating frame 611 to move in a circle through the cooperation of the shaft column 614 and the slide groove 3 615;

[0043] At this time, a groove 608 is opened through the top of the two clamping side plates 601, and a clamping top plate 609 is set on the inner wall of the groove 608, and the inside of the clamping top plate 609 is fixedly connected with an axle rod 610, and at the same time, the two ends of the axle rod 610 pass through the inner wall of the groove 608 and extend to the outside of the clamping side plate 601, and the outer walls of the two extended ends of the axle rod 610 are fixedly connected with a rotating frame 611, so that the clamping top plate 609 is synchronously driven to flip during the clamping process on both sides, so that the top of the vertical arm body 2 can be pressed down and clamped, forming an all-round constraint on the pulling arm. This multi-dimensional clamping method can better resist the residual stress generated during the welding cooling process, effectively reduce the distortion and deformation of the pulling arm due to stress accumulation, so that the pulling arm can maintain its original shape and size during the welding cooling process, and improve the qualified rate of the finished product;

[0044] Furthermore, the tooth block 1 619 and the tooth block 2 620 are both made of rubber, so that the tooth block 2 620 can normally limit the rotation of the tooth block 1 619 before clamping. When the clamping of both sides is completed, the driving rod 603 will continue to rotate. At this time, under the hard limit, the tooth block 2 620 will not be able to limit the rotation of the tooth block 1 619, but will deform to achieve a similar effect of tooth skipping, so that the driving rod 603 can rotate while maintaining the clamping state of both sides.

[0045] Embodiment 2: Based on the above embodiment, an expansion vibration mechanism 7 is provided on the top of the welding workbench 1;

[0046] Further, the extended vibration mechanism 7 includes a translation plate 701, the bottoms of the two translation plates 701 are slidably connected to the top of the welding workbench 1, the bottoms of the two translation plates 701 are fixedly connected to the limiting blocks 702, the top of the welding workbench 1 is provided with limiting grooves 9 corresponding to the limiting blocks 702, and the outer wall of the limiting blocks 702 is fitted and slidably matched with the inner wall of the limiting grooves 9, the limiting blocks 702 are in an inverted T shape, the same side walls of the two translation plates 701 are hinged with connecting rods 1 703, the same side walls of the two connecting rods 1 703 are hinged with connecting rods 2 704, the ends of the two connecting rods 2 704 that are close to each other are rotatably connected with a rotating rod 705, and the outer wall of the rotating rod 705 is fixedly connected with a driven gear 706 corresponding to the driving gear 621;

[0047] More specifically, in this embodiment, during the clamping process on both sides, when the clamping is nearly completed, the two translation plates 701 can be squeezed synchronously, and the bottoms of the two translation plates 701 are fixedly connected to the limiting blocks 702, and the top of the welding workbench 1 is provided with limiting grooves 9 corresponding to the limiting blocks 702, and the outer wall of the limiting block 702 is slidably matched with the inner wall of the limiting groove 9, and the limiting block 702 is in an inverted T shape, thereby ensuring the stability of the translation plate 701 during the movement process;

[0048] Then, when the two translation plates 701 approach each other, the same side wall of the two translation plates 701 is hinged with a connecting rod 1 703, and the same side wall of the two connecting rods 1 703 is hinged with a connecting rod 2 704, and the end portions of the two connecting rods 2 704 that are close to each other are rotatably connected with a rotating rod 705, and at the same time, the outer wall of the rotating rod 705 is fixedly connected with a driven gear 706 corresponding to the driving gear 621, so that the driven gear 706 can be driven to move in the direction of the driving gear 621, and then when the clamping of the two sides is completed, the driving gear 621 will mesh with the driven gear 706 for transmission;

[0049] Then, eccentric annular grooves 707 are provided on both end surfaces of the driven gear 706, and a support cylinder 708 is provided inside the support plate 5, and a limiting groove 709 is provided on the outer wall of the support cylinder 708 corresponding to the support plate 5, and at the same time, the inner wall of the support plate 5 and the outer wall of the limiting groove 709 are fitted and slid, and the inner wall of the support cylinder 708 is fitted and slidably connected with a sliding column 710, and the outer wall of the sliding column 710 away from the support cylinder 708 is fixedly connected with a connecting frame 711, and at the same time, the two sides of the connecting frame 711 away from the support cylinder 708 are slidably connected with the inner wall of the eccentric annular groove 707, so that the sliding column 710 can move forward and backward through the cooperation of the connecting frame 711 and the eccentric annular groove 707;

[0050] Next, in order to enable the sliding column 710 to use the forward and backward movement to drive the supporting cylinder 708 to collide and vibrate with the welding seam of the pulling arm, and at the same time to compensate for the position distance of the driven gear 706 from the disengaged state to the engaged state, grooves 712 are equidistantly provided on the outer wall of the sliding column 710, and a spring 713 is fixedly connected to the inner wall of the groove 712, and a block 714 is fixedly connected to the other end of the spring 713, and a groove 715 is equidistantly provided on the inner wall of the supporting cylinder 708 corresponding to the block 714, and one end of the block 714 facing the groove 715 is truncated into a cone shape, and the outer wall of the supporting cylinder 708 is opposite to the groove 715. The support plate 5 is provided with a limiting groove 709, and the inner wall of the support plate 5 and the outer wall of the limiting groove 709 are fitted and slid together, so that in a complete forward and backward movement process, when the driven gear 706 moves from a disengaged state to an engaged state, firstly, the plurality of card blocks 714 are all driven by the elastic force of the spring 1 713 to be stuck in the plurality of card grooves 715, and when the driven gear 706 moves to the engaged state, the slide column 710 moves a distance toward the driving gear 621, so that the part of the card block 714 located at one end of the slide column 710 close to the driving gear 621 slides out from the inner wall of the support tube 708, completing the compensation of the engaged state;

[0051] In the meshing state, when the driven gear 706 rotates, the cooperation between the partial clamping block 714 and the clamping groove 715 can still drive the support cylinder 708 to move forward and backward, so that the welding position of the clamped arm can be immediately subjected to collision vibration through the cooperation between the eccentric annular groove 707 and the support cylinder 708 only when the clamping is completed, so as to avoid the change of the clamping position due to premature vibration, so that the residual stress can be redistributed and released through the collision vibration, and the welded part can reach a stable state faster, thereby shortening the production cycle, and the stress distribution inside the arm will become more uniform, which helps to reduce the occurrence of stress concentration and improve the overall strength and stability of the arm.

[0052] Then, a return torsion spring 616 is provided on the outer wall of the two extended ends of the shaft rod 610, and the end portions of the return torsion spring 616 close to each other overlap the outer walls of the two sides of the clamping side plate 601, and the ends of the two return torsion springs 616 far away from each other overlap the outer wall of the shaft rod 610, so that when the welding cooling is completed and the clamping is released, the return torsion spring 616 can drive the clamping top plate 609 to reset;

[0053] Then, a second spring 716 is fixedly connected to the outer wall of one side of the two limit blocks 702, and one end of the two second springs 716 is fixedly connected to the inner wall of the limit slot 9, so that when the clamping is released, the two translation plates 701 can be reset by the rebound of the second spring 716;

[0054] Embodiment 3, based on the above embodiment, the outer walls of both sides of the support plate 5 are provided with welding slag scraping mechanisms 8;

[0055] Further, the welding slag scraping mechanism 8 includes a U-shaped frame 801, and the ends of the two U-shaped frames 801 that are close to each other are fixedly connected to the outer walls of both sides of the support plate 5. The inner walls of the two U-shaped frames 801 facing the vertical arm body 2 are provided with movable grooves 802, and the inner walls of the movable grooves 802 are slidably connected with sliders 803. The ends of the two sliders 803 that are close to each other are fixedly connected with scrapers 804. The outer walls of the two sliders 803 that are away from the vertical arm body 2 are hinged with connecting rods 3 805, and the other ends of the two connecting rods 3 805 are hinged to the outer walls of both sides of the support cylinder 708.

[0056] More specifically, in this embodiment, in order to prevent the slag, scale and other hard residues on the weld surface from forming local stress concentration points, which may cause crack propagation during vibration, and to prevent impurities from being embedded in the weld due to vibration to form inclusions or pores, a slider 803 is slidably connected to the inner wall of the movable groove 802, and a scraper 804 is fixedly connected to one end of the two sliders 803 that are close to each other, and a connecting rod 3 805 is hinged to the outer wall of the two sliders 803 away from the vertical arm body 2. At the same time, the other ends of the two connecting rods 3 805 are hinged on the outer walls of both sides of the support tube 708, and the outer wall of the anti-slip block 806 is slidably connected to the inner wall of the slide groove 4 807, so that through the cooperation of the anti-slip block 806 and the slide groove 4 807, before the support tube 708 collides and vibrates, the two connecting rods 3 805 can be used to drive the two combined scrapers 804 to scrape and clean the vibration position in advance. After scraping, the stress can be evenly transmitted, the stress relief effect is improved, and the subsequent welding quality of the welding tooling is guaranteed.

[0057] The welding method of the arm beam welding tooling of a hook arm car is:

[0058] During the cooling and fixing after welding, the two clamping side plates 601 are driven by the driving motor 604 to move and clamp the two sides of the pulling arm. During the clamping process on both sides, the two sliding rods 607 can contact and press the two sides of the pulling arm in advance, so that the sliding rods 607 can drive the rotating frame 611 to move in a circle through the cooperation of the shaft column 614 and the slide groove 3 615, and drive the clamping top plate 609 to flip, so that the top of the vertical arm body 2 can be pressed down and clamped, forming an all-round constraint on the pulling arm;

[0059] Then, during the clamping process on both sides, when the clamping is nearly completed, the two translation plates 701 can be squeezed synchronously, so that the two translation plates 701 are close to each other, thereby driving the driven gear 706 to move in the direction of the driving gear 621, and then when the clamping on both sides is completed, the driving gear 621 will mesh with the driven gear 706, so that the sliding column 710 can move forward and backward through the cooperation of the connecting frame 711 and the eccentric annular groove 707. At this time, the cooperation of some clamping blocks 714 and the clamping groove 715 can still drive the support cylinder 708 to move forward and backward, thereby achieving that the welding position of the clamped arm can only be immediately subjected to collision vibration through the cooperation of the eccentric annular groove 707 and the support cylinder 708 when the clamping is completed, so as to avoid the clamping position changing due to premature vibration, so that the residual stress can be redistributed and released through collision vibration, and the welded part can reach a stable state faster, thereby shortening the production cycle;

[0060] Then, before the support tube 708 collides and vibrates, the anti-slip block 806 and the slide groove four 807 can be coordinated, and the two connecting rods three 805 can be used to drive the two combined scrapers 804 to scrape and clean the vibration position in advance. After scraping, the stress can be evenly transmitted, the stress relief effect is improved, and the subsequent welding quality of this welding tooling is guaranteed.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding tool for a boom truck arm beam, comprising a welding workbench (1), a vertical arm body (2), a horizontal arm body (3), and a welding fixture component (4), characterized in that: A support plate (5) is fixedly connected to the top of the tailor-made welding workbench (1), and the welding fixture component (4) is arranged on the top of the tailor-made welding workbench (1); The top of the tailor-made welding workbench (1) is provided with a clamping and flipping mechanism (6) so as to press down and clamp the top of the vertical arm body (2) synchronously during the clamping process on both sides when the welding is cooling; The top of the welding workbench (1) is provided with an extended vibration mechanism (7) so as to immediately perform collision vibration on the welding position of the clamped arm after the clamping of the arm is completed; The outer walls on both sides of the support plate (5) are provided with welding slag scraping mechanisms (8) to clean the welding slag at the vibration position before each vibration.

2. The welding tool for the boom beam of a hook truck according to claim 1, characterized in that: The clamping and flipping mechanism (6) comprises a clamping side plate (601), the same side walls of the two clamping side plates (601) are fixedly connected to a connecting plate (602), the interiors of the two connecting plates (602) are provided with a driving rod (603), a driving motor (604) is fixedly installed on the top of the tailor-made welding workbench (1), and an output shaft at one end of the driving motor (604) is fixedly connected to one end of the driving rod (603), a supporting seat (605) is fixedly connected to the top of the tailor-made welding workbench (1), and one end of the driving rod (603) away from the driving motor (604) is rotatably connected to one side of the supporting seat (605). The outer wall, the outer wall on the side where the two clamping side plates (601) are close to each other is penetrated by a sliding groove (606), and the inner wall of the sliding groove (606) is slidably connected with a sliding rod (607), the top of the two clamping side plates (601) is provided with a groove (608), and the inner wall of the groove (608) is provided with a clamping top plate (609), the inside of the clamping top plate (609) is fixedly connected with an axle rod (610), and the two ends of the axle rod (610) pass through the inner wall of the groove (608) and extend to the outside of the clamping side plate (601), and the outer walls of the two extended ends of the axle rod (610) are fixedly connected with a rotating frame (611).

3. The welding tool for the boom beam of a hook truck according to claim 2, characterized in that: The outer walls on both sides of the slide bar (607) are fixedly connected with L-shaped rods (612), and the bottom of the rotating frame (611) is provided with a second slide groove (613) corresponding to the L-shaped rod (612), and the outer wall of the L-shaped rod (612) and the inner wall of the second slide groove (613) are fitted and slidable, and the outer walls on both sides of the L-shaped rod (612) are fixedly connected with shaft columns (614), and the outer walls on both sides of the rotating frame (611) correspond to the shaft columns (614). A sliding groove three (615) is provided through the shaft column (614), and the outer wall of the shaft column (614) slides in close contact with the inner wall of the sliding groove three (615). The outer walls of the two extended ends of the shaft rod (610) are provided with return torsion springs (616). The ends of the return torsion springs (616) that are close to each other are overlapped on the outer walls of the two sides of the clamping side plate (601), and the ends of the two return torsion springs (616) that are far away are overlapped on the outer wall of the shaft rod (610).

4. The welding tool for the boom beam of a hook truck according to claim 3 is characterized in that: The outer wall of the driving rod (603) is symmetrically threadedly connected with a threaded sleeve (617); a rotation groove (618) is provided inside the two connecting plates (602) corresponding to the threaded sleeve (617); and the outer wall of the threaded sleeve (617) is rotatably connected to the inner wall of the rotation groove (618); a tooth block 1 (619) is fixedly connected to the outer wall of the threaded sleeve (617) at an equal distance; and a tooth block 2 (620) is fixedly connected to the inner wall of the rotation groove (618) corresponding to the tooth block 1 (619) at an equal distance; both the tooth block 1 (619) and the tooth block 2 (620) are made of rubber material; the bottoms of the two connecting plates (602) are slidably connected to the top of the welding workbench (1); the outer wall thread of the driving rod (603) is oppositely arranged corresponding to the two threaded sleeves (617); and the center of the outer wall of the driving rod (603) is fixedly connected with a driving gear (621) corresponding to the expansion vibration mechanism (7).

5. The welding tool for the boom beam of a hook truck according to claim 4, characterized in that: The extended vibration mechanism (7) comprises a translation plate (701), the bottoms of the two translation plates (701) are slidably connected to the top of the welding workbench (1), the bottoms of the two translation plates (701) are fixedly connected to a limit block (702), the top of the welding workbench (1) is provided with a limit groove (9) corresponding to the limit block (702), and the outer wall of the limit block (702) is fitted and slidably matched with the inner wall of the limit groove (9), the limit block (702) is in an inverted T shape, the same side wall of the two translation plates (701) is hinged with a connecting rod 1 (703), the same side wall of the two connecting rods 1 (703) is hinged with a connecting rod 2 (704), the adjacent ends of the two connecting rods 2 (704) are rotatably connected with a rotating rod (705), and the outer wall of the rotating rod (705) is fixedly connected with a driven gear (706) corresponding to the driving gear (621).

6. The welding tool for the boom beam of a hook truck according to claim 5, characterized in that: The two end surfaces of the driven gear (706) are provided with eccentric annular grooves (707), the support plate (5) is provided with a support tube (708), and the outer wall of the support tube (708) is provided with a limiting groove (709) corresponding to the support plate (5), the inner wall of the support plate (5) and the outer wall of the limiting groove (709) are fitted and slid, the inner wall of the support tube (708) is fitted and slidably connected with a sliding column (710), and the outer wall of the sliding column (710) is fixedly connected with a connecting frame (711) at one end away from the support tube (708), and the two sides of the connecting frame (711) away from the support tube (708) are slidably connected with the inner wall of the eccentric annular groove (707), and the outer wall of the sliding column (710) is fixedly connected with a connecting frame (711), and the two sides of the connecting frame (711) away from the support tube (708) are slidably connected with the inner wall of the eccentric annular groove (707), and the outer wall of the sliding column (710) is fixedly connected with the outer wall of the sliding column (710). A groove (712) is provided at a distance therefrom, and a spring (713) is fixedly connected to the inner wall of the groove (712), and a clamping block (714) is fixedly connected to the other end of the spring (713). A clamping groove (715) is provided on the inner wall of the support tube (708) at an equal distance from the clamping block (714), and one end of the clamping block (714) facing the clamping groove (715) is in a truncated cone shape. The clamping block (714) forms a telescopic structure with the groove (712) through the spring (713). A spring (716) is fixedly connected to the outer wall of the side where the two limit blocks (702) are close to each other, and one end of the two springs (716) is fixedly connected to the inner wall of the limit groove (9).

7. The welding tool for the boom beam of a hook truck according to claim 6, characterized in that: The welding slag scraping mechanism (8) comprises a U-shaped frame (801), the ends of the two U-shaped frames (801) being close to each other are fixedly connected to the outer walls of both sides of the support plate (5), the inner walls of the two U-shaped frames (801) facing the vertical arm body (2) are provided with movable grooves (802), and the inner walls of the movable grooves (802) are slidably connected with sliders (803), the ends of the two sliders (803) being close to each other are fixedly connected with scrapers (804), the outer walls of the two sliders (803) away from the vertical arm body (2) are hinged with connecting rods three (805), and the other ends of the two connecting rods three (805) are hinged to the outer walls of both sides of the support tube (708).

8. The welding tool for boom beam of a hook truck according to claim 7, characterized in that: The inner wall of the movable groove (802) is symmetrically provided with a sliding groove four (807), and the upper and lower side walls of the sliding block (803) are fixedly connected with an anti-slip block (806) corresponding to the sliding groove four (807), and the outer wall of the anti-slip block (806) is slidably connected to the inner wall of the sliding groove four (807).

9. A welding method for a boom truck arm beam welding tool, characterized in that: The following steps are involved: S1: Clamping and flipping: During the clamping process on both sides, the two slide bars (607) are in contact with and pressed against the two sides of the pulling arm in advance, so that the slide bars (607) can drive the rotating frame (611) to move in a circle through the cooperation of the shaft column (614) and the slide groove three (615), drive the clamping top plate (609) to flip, and press down the top of the vertical arm body (2) to clamp; S2: Delayed vibration: When the clamping of both sides is completed, the driving gear (621) will mesh with the driven gear (706) to enable the sliding column (710) to move forward and backward through the cooperation of the connecting frame (711) and the eccentric annular groove (707). At this time, the cooperation of the partial clamping block (714) and the clamping groove (715) is used to drive the support tube (708) to move forward and backward. When the clamping is completed, the eccentric annular groove (707) and the support tube (708) can be used to immediately collide and vibrate the welding position of the clamped arm, so that the residual stress can be redistributed and released. S3: Pre-slag removal: Before the support tube (708) collides and vibrates, the anti-slip block (806) cooperates with the chute four (807), and two connecting rods three (805) drive two combined scrapers (804) to pre-scrape and clean the vibration position. After scraping, the stress can be evenly transmitted, thereby improving the stress relief effect.

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