A kind of welding fixture and welding method for boom truck arm beam

Abstract

The present invention discloses a welding fixture and welding method for an arm beam of a pulling arm vehicle, which relates to the field of welding auxiliary technology, including a welding workbench, a vertical arm body, a horizontal arm body, and a welding fixture component, wherein the top of the welding workbench is fixedly connected to a support plate. When in use, the present invention drives the clamping side plate to fix the vertical arm body and the horizontal arm body through a driving motor, and at the same time, the sliding rod cooperates with the clamping top plate to achieve all-round clamping, resisting the residual stress during welding cooling, maintaining the shape and size of the pulling arm, and improving the qualified rate. When the clamping is nearly completed, the gears are engaged through the translation plate and the connecting rod, and the eccentric ring groove and the support cylinder are used to cooperate with the welding position to perform collision vibration, so that the residual stress is redistributed and released, shortening the production cycle, and improving the strength and stability of the pulling arm. In addition, the connecting rod three cooperates with the slider to clean the slag, oxide scale, etc. on the weld surface before vibration, avoid stress concentration and crack expansion, and ensure welding quality.

Description

Technical Field

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

[0002] A boom truck, also known as a boom garbage truck, is a commonly used vehicle with a detachable carriage. Its main components include a frame, a subframe installed on the frame, a boom frame installed on the subframe, and an arm installed on the boom frame. The arm is driven by an arm cylinder when working. Its shape is L-shaped, with a hook at the upper end for hooking the 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. Within a large stroke, ensuring the verticality, parallelism and coaxiality of the middle boom and the mounting hole is an important guarantee for the reliable operation of the boom truck.

[0003] The main components of the pull arm include a horizontal arm and a vertical arm. The current welding method of the pull arm is mainly that the staff places the pull arm components on the welding workbench, and the pneumatic clamps respectively clamp and fix the components of the pull arm, and then weld them together step by step by manual or welding robot arms. When the weld of the component is cooled after welding, the tensile stress generated due to the cooling and shrinkage of the weld will cause pulling on the component. Therefore, for the pull arm, the key is to prevent it from twisting and deformation during the welding cooling process, which will cause the verticality between the vertical arm and the horizontal arm of the pull arm to be insufficient or the upper end to be tilted. The industry usually uses rigid fixation 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 background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following welding fixture 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-welding workbench is provided with a clamping and flipping mechanism, so that when the welding is cooling, 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-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 vibrated after the clamping of the arm is completed;

[0009] The outer walls of both sides of the support plate are provided with welding slag scraping mechanisms so as to clean the welding slag from the vibration position before each vibration when the welding is cooled.

[0010] Material toggling mechanism, its both sides respectively have a cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion.

[0011] Preferably, the outer walls of both sides of the sliding rod are fixedly connected with an L-shaped rod, and 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, and the outer walls of the both sides of the L-shaped rod are fixedly connected with an axis column, and a sliding groove 3 is provided through the outer walls of both sides of the rotating frame corresponding to the axis column, and the outer wall of the axis column slides in fit with the inner wall of the sliding groove 3, and the outer walls of the two extended ends of the axis rod are fitted with return torsion springs, and the close end of the return torsion spring is overlapped on the outer walls of both sides of the clamping side plate, and the farthest end of the two return torsion springs is overlapped on the outer wall of the axis rod.

[0012] Preferably, the outer wall of the driving rod is symmetrically threaded with a threaded sleeve, the inner parts of the two connecting plates are provided with a rotating groove corresponding to the threaded sleeve, and the outer wall of the threaded sleeve is rotatably connected to the inner wall of the rotating groove, the outer wall of the threaded sleeve is equidistantly fixedly connected with tooth block 1, and the inner wall of the rotating groove is equidistantly fixedly connected with tooth block 2 corresponding to tooth block 1, both of which are made of rubber, and 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 a driving 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 corresponds to the limiting block to provide a limiting groove, and the outer wall of the limiting block fits and slides 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 of the two connecting rods 2 is rotatably connected to a rotating rod, and the outer wall of the rotating rod is fixedly connected to the driven gear corresponding to the driving gear.

[0014] The cam is fixedly provided with a toothed plate at two ends, and the toothed plate is fixedly provided with a toothed plate at two ends, and the toothed plate is fixedly provided with a toothed plate at two ends, and the toothed plate is fixedly provided with a toothed plate at a rear end thereof.

[0015] Preferably, the welding slag scraping mechanism includes a U-shaped frame, and the two ends of the 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 two U-shaped frames are provided with movable grooves on the inner walls of one side facing the vertical arm body, 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 four slide grooves, the upper and lower side walls of the slider are fixedly connected with anti-slip blocks corresponding to the four slide grooves, and the outer wall of the anti-slip block is slidably connected to the inner wall of the four slide grooves.

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

[0018] S1: Clamping and flipping: During the clamping process on both sides, the two sliding rods can pre-contact and press the two sides of the pulling arm, so that the sliding rods can cooperate with the shaft column and the slide slot three to drive the rotating frame to move in a circle, driving 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 is completed on both sides, 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 between some clamping blocks and the clamping groove can still drive the support cylinder to move forward and backward. Therefore, it is necessary to complete the clamping before the eccentric ring groove and the support cylinder can cooperate to immediately vibrate the welding position of the clamped pull arm, 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 4 can cooperate with the two connecting rods 3 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 sliding rod and the clamping top plate can be coordinated 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 this welding fixture is in use, it can simultaneously squeeze the two translation plates when the clamping is nearly completed, so that the driven gear and the driving gear can be engaged with each other through the cooperation of connecting rod one and connecting rod two, 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 more quickly, thereby shortening the production cycle. The stress distribution inside the pull arm will become more uniform, which will help 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 and the slider can be used to scrape and clean the vibration position before each vibration to avoid the formation of local stress concentration points by hard residues such as slag and oxide scale on the weld surface, which may cause crack expansion during vibration. After scraping, the stress can be evenly transmitted, and the stress relief effect can be improved. At the same time, impurities can be prevented 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 This is a 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 expansion vibration mechanism of the present invention;

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

[0032] Figure 8 For the present invention Figure 7 A schematic diagram of the structure enlarged in the middle;

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

[0034] In the figure: 1. welding table; 2. vertical arm body; 3. horizontal arm body; 4. welding fixture component; 5. support plate; 9. limit groove; 6. clamping and flipping mechanism; 601. clamping side plate; 602. connecting plate; 603. drive rod; 604. drive motor; 605. support base 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. gear block 1; 620 , gear 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, slider; 804, scraper; 805, connecting rod three; 806, anti-slip block; 807, slide groove four. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0036] For example 1, please refer to Figures 1-9 The present invention provides a boom truck arm beam welding tool, 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 turning mechanism 6 is provided on the top of the tailor-welding workbench 1;

[0038] Furthermore, the clamping and flipping mechanism 6 includes a clamping side plate 601, and the same side wall of the two clamping side plates 601 is fixedly connected to a connecting plate 602, and the inside of the two connecting plates 602 is 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 support seat 605 is fixedly connected to the top of the tailor-made welding workbench 1, and one end of the driving rod 603 is rotatably connected to an outer wall of one side of the support seat 605 away from the driving motor 604.

[0039] More specifically, in this embodiment, the tailor-made welding workbench 1 is first divided into two parts, one side being a welding processing area and the other side being 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 4. Then, the tailor-made welding connection is performed step by step manually or by a welding robot. After welding is completed, they are transferred to the welding cooling area for cooling so that processing can continue in the welding processing area.

[0040] During the 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 a driving rod 603 is provided inside the two connecting plates 602. The output shaft at one end of the driving motor 604 is fixedly connected to one end of the driving rod 603. The top of the tailor-made welding workbench 1 is fixedly connected to a support seat 1 605. The 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 threaded with a threaded sleeve 617, and the inner part of the two connecting plates 602 is 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 fixedly connected with a tooth block 1 619 at an equal distance, and the inner wall of the rotation groove 618 is fixedly connected with a tooth block 2 620 at an equal distance 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 restrict the gear block 1 619, thereby restricting the rotation of the threaded sleeve 617. Then, when the threaded sleeve 617 cannot rotate, the outer wall thread of the driving rod 603 can drive the connecting plate 602 to move. Then, the bottom of the two connecting plates 602 is slidably connected to the top of the tailor-made welding workbench 1, and the outer wall thread of the driving rod 603 is oppositely arranged to the two threaded sleeves 617. Therefore, the opposite thread setting can drive the two clamping side plates 601 to move and clamp the two sides of the pulling arm.

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

[0043] At this time, a groove 608 is provided on the top of the two clamping side plates 601, and a clamping top plate 609 is provided on the inner wall of the groove 608, and the inside of the clamping top plate 609 is fixedly connected to a shaft rod 610, and at the same time, the two ends of the shaft 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 shaft rod 610 are fixedly connected to 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, both the tooth block 1 619 and the tooth block 2 620 are made of rubber, so that before clamping, the tooth block 2 620 can normally limit the rotation of the tooth block 1 619. When the two sides are clamped, the drive 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 an effect similar to tooth jumping, so that the drive rod 603 can rotate while maintaining the clamping state of the two sides.

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

[0046] Furthermore, 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 tailored welding workbench 1, the bottoms of the two translation plates 701 are fixedly connected to the limit blocks 702, the top of the tailored welding workbench 1 corresponds to the limit blocks 702 to provide a limit slot 9, and the outer wall of the limit block 702 fits and slides with the inner wall of the limit slot 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 close end of the two connecting rods 2 704 is rotatably connected to a rotating rod 705, and the outer wall of the rotating rod 705 is fixedly connected to the 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. 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. The outer wall of the limiting block 702 is slidably matched with the inner wall of the limiting groove 9. The limiting block 702 is in an inverted T shape, thereby ensuring the stability of the translation plate 701 during movement.

[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 of the two connecting rods 2 704 that are close to each other is rotatably connected to a rotating rod 705. At the same time, the outer wall of the rotating rod 705 is fixedly connected to a driven gear 706 corresponding to the driving gear 621, thereby driving the driven gear 706 to move in the direction of the driving gear 621. 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. At the same time, the inner wall of the support plate 5 is fitted and slid with the outer wall of the limiting groove 709, and the inner wall of the support cylinder 708 is fitted and slidably connected with a sliding post 710, and the outer wall of the end of the sliding post 710 away from the support cylinder 708 is fixedly connected to 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 to the inner wall of the eccentric annular groove 707, so that the sliding post 710 can move forward and backward through the cooperation of the connecting frame 711 and the eccentric annular groove 707;

[0050] Then, in order to enable the sliding column 710 to use the forward and backward movement to drive the support cylinder 708 to collide and vibrate the weld of the pulling arm, and at the same time 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 the inner wall of the groove 712 is fixedly connected to a spring 713, and the other end of the spring 713 is fixedly connected to a block 714, and at the same time, the inner wall of the support cylinder 708 is equidistantly provided with a slot 715 corresponding to the block 714, and the end of the block 714 facing the slot 715 is truncated into a cone shape, and the outer wall of the support cylinder 708 is opposite to the The support plate 5 is provided with a limiting groove 709, and the inner wall of the support plate 5 slides in contact with the outer wall of the limiting groove 709. Therefore, during a complete forward and backward movement, when the driven gear 706 moves from the disengaged state to the engaged state, first, the plurality of blocks 714 are all driven by the elastic force of the spring 1 713 to be stuck in the plurality of slots 715. When the driven gear 706 moves to the engaged state, the slide post 710 moves a distance toward the driving gear 621, so that the part of the block 714 located at the end of the slide post 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] When the driven gear 706 rotates in the meshing state, the support cylinder 708 can be driven to move forward and backward by utilizing the cooperation between the partial clamping block 714 and the clamping groove 715, so that the welding position of the clamped arm can be immediately subjected to collision vibration through the cooperation between the eccentric ring groove 707 and the support cylinder 708 only when the clamping is completed, so as to avoid the clamping position from being changed due to premature vibration, thereby enabling the residual stress to be redistributed and released through collision vibration, and the welded part can reach a stable state more quickly, 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, return torsion springs 616 are provided on the outer walls of the two extended ends of the shaft 610. The ends of the return torsion springs 616 that are 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 that are far away overlap the outer wall of the shaft 610. When the welding is cooled and the clamping is released, the return torsion springs 616 can drive the clamping top plate 609 to reset.

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

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

[0055] Furthermore, 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 two U-shaped frames 801 are provided with a movable groove 802 on the inner wall of one side facing the vertical arm body 2, and a slider 803 is slidably connected to the inner wall of the movable groove 802. The ends of the two sliders 803 that are close to each other are fixedly connected to a scraper 804. The outer wall of the two sliders 803 that are away from the vertical arm body 2 is hinged with a connecting rod 3 805, and the other ends of the two connecting rods 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 hard residues such as slag and oxide scale on the surface of the weld 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 the end where the two sliders 803 are close to each other, and a connecting rod 805 is hinged to the outer wall of the side 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 to 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 this welding tool is guaranteed.

[0057] The welding method of this kind of hook arm beam welding fixture 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 be pre-contacted with and pressed against the two sides of the pulling arm, so that the sliding rods 607 can cooperate with the shaft column 614 and the slide groove 3 615 to drive the rotating frame 611 to move in a circle, 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. Then, when the clamping on both sides is completed, the driving gear 621 will mesh with the driven gear 706, so that the sliding post 710 can move back and forth through the cooperation of the connecting frame 711 and the eccentric ring 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 back and forth, thereby achieving that the welding position of the clamped arm can be immediately subjected to collision vibration through the cooperation of the eccentric ring groove 707 and the support cylinder 708 when the clamping is completed, avoiding the change of the clamping position due to premature vibration, thereby redistributing and releasing the residual stress through collision vibration, and the welded part can reach a stable state more quickly, 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 tool is guaranteed.

[0061] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A welding fixture 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-welding workbench (1) is provided with a clamping and flipping mechanism (6) for simultaneously pressing down and clamping the top of the vertical arm body (2) during the clamping process on both sides when the welding is cooling; An extended vibration mechanism (7) is provided on the top of the tailor-welding workbench (1) to immediately perform collision vibration on the welding position of the clamped arm after the clamping of the arm is completed; The outer walls of 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; The clamping and flipping mechanism (6) comprises a clamping side plate (601), the same side wall of the two clamping side plates (601) is fixedly connected to a connecting plate (602), and the interior of the two connecting plates (602) is provided with a driving rod (603); The outer wall of the driving rod (603) is symmetrically threadedly connected to a threaded sleeve (617), the inner parts of 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), the outer wall of the threaded sleeve (617) is equidistantly fixedly connected to a tooth block 1 (619), the inner wall of the rotation groove (618) is equidistantly fixedly connected to a tooth block 2 (620) corresponding to the tooth block 1 (619), 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 to a driving gear (621) corresponding to the expansion vibration mechanism (7); 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 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 to a rotating rod (705), and the outer wall of the rotating rod (705) is fixedly connected to a driven gear (706) corresponding to the driving gear (621); 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) is fitted and slid with the outer wall of the limiting groove (709), 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 connecting frame (711) is slidably connected with the inner wall of the eccentric annular groove (707) at both sides away from the support tube (708); 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), and 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 to the sliders (803), and the ends of the two sliders (803) that are close to each other are fixedly connected to the scrapers (804), and the outer walls of the two sliders (803) that are away from the vertical arm body (2) are hinged to the outer walls of the two connecting rods (805), and the other ends of the two connecting rods (805) are hinged to the outer walls of both sides of the support tube (708).

2. The tailor-made welding fixture for the boom truck arm beam according to claim 1, characterized in that: 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). 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 support seat (605). The outer walls of the two clamping side plates (601) that are close to each other are both penetrated by a sliding groove (606), and the sliding groove (606) is fixedly connected to the outer wall of the support seat (605). The inner wall of groove one (606) is slidably connected to a slide bar (607), the tops of the two clamping side plates (601) are each provided with a groove one (608), and the inner wall of groove one (608) is provided with a clamping top plate (609), the interior of the clamping top plate (609) is fixedly connected to a shaft rod (610), and the two ends of the shaft rod (610) pass through the inner wall of groove one (608) and extend to the outside of the clamping side plate (601), and the outer walls of the two extended ends of the shaft rod (610) are fixedly connected to a rotating frame (611).

3. The tailor-made welding fixture for the boom truck arm beam according to claim 2, characterized in that: The outer walls on both sides of the sliding rod (607) are fixedly connected with an L-shaped rod (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) is fitted and slid with the inner wall of the second slide groove (613), and the outer walls of the L-shaped rod (612) are fixedly connected with an axis column (614) on both sides of the outer walls of the rotating frame (611), and a third slide groove (615) is provided through the outer walls of the two sides of the rotating frame (611) corresponding to the axis column (614), and the outer wall of the axis column (614) is fitted and slid with the inner wall of the third slide groove (615), and the outer walls of the two extended ends of the axis rod (610) are fitted with a return torsion spring (616), and the end of the return torsion spring (616) that is close to each other is overlapped on the outer walls of the two sides of the clamping side plate (601), and the end of the two return torsion springs (616) that is far away is overlapped on the outer wall of the axis rod (610).

4. The tailor-made welding fixture for the boom truck according to claim 3, characterized in that: 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 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.

5. The tailor-made welding fixture for the boom truck arm beam according to claim 4, characterized in that: The outer wall of the sliding column (710) is provided with grooves (712) at equal intervals, and the inner wall of the groove (712) is fixedly connected with a spring (713), and the other end of the spring (713) is fixedly connected with a clamping block (714), and the inner wall of the support cylinder (708) is provided with clamping grooves (715) at equal intervals corresponding to the clamping block (714), and one end of the clamping block (714) facing the clamping groove (715) is in a truncated cone shape, and the clamping block (714) forms a telescopic structure with the groove (712) through the spring (713), and the outer wall of the side where the two limit blocks (702) are close to each other is fixedly connected with a spring (716), and the one end of the two springs (716) that are close to each other is fixedly connected to the inner wall of the limit groove (9).

6. The tailor-made welding fixture for the boom truck arm beam according to claim 5, 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 slider (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).

7. The welding method of the boom truck arm beam welding fixture according to claim 6, 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 pull arm in advance, so that the slide bars (607) can cooperate with the shaft column (614) and the slide groove three (615) to drive the rotating frame (611) to move in a circle, drive the clamping top plate (609) to flip, and press down the top of the vertical arm body (2); S2: Delayed vibration: When the clamping of both sides is completed, the driving gear (621) will be meshed with the driven gear (706) to transmit the transmission, so that the sliding column (710) can move forward and backward through the cooperation of the connecting frame (711) and the eccentric ring groove (707). At this time, the cooperation of the partial clamping block (714) and the clamping groove (715) is used to drive the support cylinder (708) to move forward and backward, so that when the clamping is completed, the eccentric ring groove (707) and the support cylinder (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 cylinder (708) collides and vibrates, the anti-slip block (806) cooperates with the chute four (807), and the two connecting rods three (805) drive the 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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