Welding forming device for motorcycle trunk body

Abstract

The invention relates to the technical field of motorcycle trunk welding, in particular to a motorcycle trunk body welding forming device which comprises a welding gun, the welding gun is used for welding a connecting piece fixed to a sectional material and an aluminum alloy plate, a fixing frame is arranged on the rear side of the welding gun, a driving assembly is arranged on the fixing frame, and the driving assembly is used for driving the connecting piece to rotate. The driving assembly is used for driving the first knocking assembly to knock a welding seam formed between the connecting piece and the aluminum alloy plate; the bottom end of the first knocking assembly abuts against the top of the welding seam in a pressing mode, and the width of the bottom end of the first knocking assembly is smaller than that of the welding seam. The driving assembly comprises a motor and a second rotating shaft, and the motor drives the second rotating shaft to rotate around the axis of the second rotating shaft; a second knocking assembly is arranged on the second rotating shaft and rotates along with the second rotating shaft. The welding seam stress can be well eliminated through double knocking.

Description

Technical Field

[0001] The invention relates to the technical field of motorcycle luggage box welding, in particular to a welding and forming device for a motorcycle luggage box. Background Art

[0002] Aluminum alloy motorcycle luggage typically uses an aluminum profile as its frame, which is then welded together to form the aluminum sheet. Plasma arc welding is a commonly used method for welding aluminum alloys. Its basic working principle is to use the high-energy density beam of a plasma arc as the welding heat source. Through mechanical, thermal, and electromagnetic compression effects, the arc is compressed into a fine plasma, achieving efficient welding.

[0003] During the welding process, the weld area is heated to a high temperature (such as a molten state), while the temperature of the parent material is relatively low. The expansion of the material in the high-temperature area is constrained by the low-temperature area, resulting in compressive stress; during cooling, the contraction of the weld area is restricted by the parent material, forming tensile stress. In short, stress will be generated at the weld position. If it is not treated, it will have an adverse effect on the structural strength of the welded structure.

[0004] Currently, hammering is an effective way to eliminate stress. Specifically, after the welding operation is completed, the worker uses a hammer to knock on the weld position to achieve the purpose of stress elimination. However, the disadvantage of this method is that the force of manual knocking is uneven, which makes it difficult to achieve the best effect in eliminating stress, and it may also cause damage to the wood itself. Summary of the Invention

[0005] The object of the present invention is to provide a welding and forming device for a motorcycle luggage box to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A welding and forming device for a motorcycle luggage box, comprising a welding gun for welding a connector fixed to a profile to an aluminum alloy plate; a fixing bracket provided at the rear of the welding gun; a drive assembly provided on the fixing bracket for driving a first striking assembly to strike a weld formed between the connector and the aluminum alloy plate;

[0008] The bottom end of the first striking component is pressed against the top of the weld, and the width of the bottom end of the first striking component is smaller than the width of the weld;

[0009] The driving assembly includes a motor and a second rotating shaft, and the motor drives the second rotating shaft to rotate around its own axis;

[0010] A second knocking assembly is provided on the second rotating shaft. The second knocking assembly rotates along with the second rotating shaft so that an end of the second knocking assembly away from the second rotating shaft knocks on the top of the first knocking assembly.

[0011] Preferably, the second striking assembly includes a hinge seat, a connecting rod and a torsion spring;

[0012] One end of the connecting rod is connected to the hinge shaft on the hinge seat;

[0013] The torsion spring is sleeved on the hinge shaft.

[0014] Preferably, the second knocking assembly further includes a knocking column, and the knocking column is fixedly connected to the other end of the connecting rod;

[0015] The axis of the knocking column is parallel to the axis of the second rotating shaft, and the axial length of the knocking column is greater than the width of the weld.

[0016] Preferably, the first striking component includes a striking ball, an extension rod and a spring sheet;

[0017] The extension rod is arranged vertically, and the bottom end thereof is fixedly connected to the knocking ball;

[0018] One end of the spring sheet is fixedly connected to the top end of the extension rod, and the other end of the spring sheet is fixedly connected to the fixing bracket via a fixing seat.

[0019] Preferably, the fixing frame includes two fixing plates arranged opposite to each other;

[0020] The second rotating shaft is rotatably connected between the two fixing plates, and the second knocking assembly is arranged between the two fixing plates;

[0021] The fixing seat is fixed between the two fixing plates.

[0022] Preferably, a plastic pad is provided at the bottom end of the fixing plate, a pin hole is provided on the upper surface of the plastic pad, a latch is fixed to the bottom end of the fixing plate, and the latch is interference fit inside the pin hole.

[0023] Preferably, the drive assembly further comprises a first gear and a second gear meshingly connected, wherein a first rotating shaft is coaxially fixed to the first gear, the second gear is coaxially fixed to the second rotating shaft, and the first rotating shaft is coaxially fixed to the output shaft of the motor;

[0024] A shell is fixed on the fixing frame, a sealing cover is fixed on one end of the shell away from the fixing frame, and the first gear and the second gear are both arranged inside the shell.

[0025] Preferably, a horizontal adjustment assembly is provided between the fixing frame and the welding gun, the horizontal adjustment assembly comprising a guide rod and a guide sleeve, the guide sleeve being slidably sleeved on the guide rod, and one end of the guide rod being fixedly connected to the welding gun via a fixing sleeve;

[0026] A connecting plate is fixed to the top of the fixing plate, and the guide sleeve is fixed between the two connecting plates;

[0027] An end block is fixed on the other end of the guide rod.

[0028] Preferably, two guide sleeves are provided, and a fastening block is provided between the two guide sleeves. A clamping groove for accommodating the guide rod is opened on one side of the fastening block. A screw is threadedly connected to the connecting plate through a screw hole, one end of the screw is against the other side of the fastening block, and a handle rod is fixed to the other end of the screw.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The present invention provides a first striking assembly and a second striking assembly. On the one hand, a motor is used to drive the second striking assembly to rotate at a certain speed, and the second striking assembly strikes the top of the first striking assembly every time it rotates a certain angle, thereby achieving the technical purpose of eliminating weld stress by striking. On the other hand, the first striking assembly is vertically arranged, which means that the first striking assembly can vertically strike the contact position between it and the weld. The advantage of vertically striking the weld is that it has a better stress elimination effect and better uniformity of plastic deformation of the weld.

[0031] 2. The present invention provides a torsion spring and a knocking column with an axial length greater than the width of the weld. On the one hand, the knocking column can knock on the top of the first knocking component, so that the first knocking component can knock on the center position of the weld; on the other hand, when the knocking column contacts the top of the first knocking component, the second rotating shaft will continue to rotate, and the knocking column will stay on the top of the first knocking component for a period of time. At this time, the torsion spring will generate a certain torsion. When the knocking column is separated from the top of the first knocking component, the torsion will push the knocking column to hit the area of ​​the connector and the aluminum alloy plate close to the weld, achieving a second knocking. This can alleviate the stress concentration in the transition zone between the weld and the connector and the aluminum alloy plate, and make up for the limitations of simply knocking on the weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 It is a structural schematic diagram of the horizontal adjustment assembly and the fixing frame of the present invention;

[0034] Figure 3It is a structural schematic diagram of the fastening block of the present invention;

[0035] Figure 4 It is a structural schematic diagram of the fixing frame and the first gear of the present invention;

[0036] Figure 5 It is a structural schematic diagram of the fixing frame of the present invention;

[0037] Figure 6 Schematic diagram of the structure of the first knocking component and the second knocking component of the present invention;

[0038] Figure 7 is a schematic structural diagram of the second striking component of the present invention;

[0039] Figure 8 Schematic diagram of the structure of the first striking component of the present invention;

[0040] Figure 9 is a partial structural diagram of the second striking component of the present invention;

[0041] Figure 10 It is a schematic diagram of the cutaway three-dimensional structure of the plastic spacer of the present invention.

[0042] In the figure: 1. Profile; 2. Connector; 3. Aluminum alloy plate; 4. Welding gun; 5. Horizontal adjustment assembly; 51. Guide sleeve; 52. Guide rod; 53. End block; 54. Fixing sleeve; 55. Screw; 56. Handle rod; 57. Fastening block; 58. Clamping groove; 59. Screw hole; 6. Fixing frame; 61. Fixing plate; 62. Connecting plate; 63. Plastic pad; 64. Latch; 65. Pin hole; 7. Driving assembly; 71. Motor; 72. First rotating shaft; 73. First gear; 74. Second rotating shaft; 75. Second gear; 76. Housing; 77. Sealing cover; 8. First knocking assembly; 81. Knocking ball; 82. Extension rod; 83. Spring sheet; 84. Fixing seat; 9. Second knocking assembly; 91. Hinge seat; 92. Hinge shaft; 93. Connecting rod; 94. Knocking column; 95. Torsion spring. DETAILED DESCRIPTION

[0043] 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.

[0044] See also Figures 1-10 , the present invention provides a technical solution:

[0045] A welding and forming device for a motorcycle luggage box includes a welding gun 4, which is the welding gun of a plasma arc welder. The welding gun 4 utilizes a high-energy-density beam of a plasma arc as a welding heat source, compressing the arc into a fine plasma through mechanical compression, thermal compression, and electromagnetic compression effects, thereby performing welding operations. The welding gun 4 is used to weld a connector 2 fixed to a profile 1 to an aluminum alloy plate 3, wherein the profile 1 and the connector 2 are made of the same material as the aluminum alloy plate 3.

[0046] For the convenience of understanding and description, the moving direction of the welding gun 4 during welding is defined as the front side, and a fixing bracket 6 is provided on the rear side of the welding gun 4. A driving assembly 7 is provided on the fixing bracket 6, and the driving assembly 7 is used to drive the first knocking assembly 8 to knock the weld formed between the connecting member 2 and the aluminum alloy plate 3; in this embodiment, the distance between the fixing bracket 6 and the welding gun 4 is adjustable, so the fixing bracket 6 can be set at a suitable position on the rear side of the welding gun 4 so that the weld temperature at this position is suitable for stress removal by knocking.

[0047] The bottom end of the first knocking component 8 is pressed against the top of the weld, and the width of the bottom end of the first knocking component 8 is smaller than the width of the weld; so that the knocking force of the first knocking component 8 knocking on the weld will not be blocked by the connecting parts 2 and the aluminum alloy plate 3 on both sides of the weld, ensuring that the first knocking component 8 will directly knock on the weld.

[0048] The driving assembly 7 includes a motor 71 and a second rotating shaft 74. The axis of the second rotating shaft 74 is consistent with the width direction of the weld. The motor 71 drives the second rotating shaft 74 to rotate around its own axis; and a second knocking assembly 9 is provided on the second rotating shaft 74. The second knocking assembly 9 rotates with the second rotating shaft 74, so that the end of the second knocking assembly 9 away from the second rotating shaft 74 knocks on the top of the first knocking assembly 8.

[0049] In this technical solution, the first striking assembly 8 is arranged vertically, and the second striking assembly 9 strikes the top of the first striking assembly 8 when it rotates to a horizontal state, so that the first striking assembly 8 can directly strike the weld from a vertical direction. The advantages of this method are:

[0050] During vertical tapping, the impact force acts perpendicularly on the weld surface, and the energy transfer is direct and concentrated, which can cause the surface metal of the weld to undergo uniform plastic deformation in the vertical direction, effectively offsetting the tensile stress generated during welding and achieving "layered release" of residual stress; the force of vertical tapping acts in the vertical direction, and only performs "flattening" plastic deformation on the weld surface (such as reducing the excess height and eliminating weld nodules), which will not cause the weld metal to shift laterally, and can avoid appearance defects such as "weld misalignment" and "edge collapse" that may be caused by oblique tapping; the impact force of vertical tapping mainly acts on the weld itself, rather than the heat-affected zone, and has minimal pulling or squeezing effect on the heat-affected zone, which can avoid secondary damage to the heat-affected zone such as microcracks and grain breakage due to lateral force; the plastic deformation caused by vertical tapping is uniform, and the surface compressive stress layer is continuously distributed and has a consistent depth (usually 0.1-0.5mm), which can effectively block the initiation and expansion of fatigue cracks.

[0051] The fixing frame 6 includes two oppositely arranged fixing plates 61 ; the second rotating shaft 74 is rotatably connected between the two fixing plates 61 through a bearing, and the second knocking assembly 9 is arranged between the two fixing plates 61 ; the fixing seat 84 is fixed between the two fixing plates 61 .

[0052] In order to prevent the fixing plate 61 from scratching the connecting part 2 and the aluminum alloy plate 3, a plastic pad 63 is provided at the bottom end of the fixing plate 61 in this technical solution; in order to facilitate the replacement of the plastic pad 63, a pin hole 65 is opened on the upper surface of the plastic pad 63, and a pin 64 is fixed at the bottom end of the fixing plate 61, and the pin 64 is interference fit inside the pin hole 65.

[0053] The working principle of the above technical solution is: use a robotic arm or other equipment to drive the welding gun 4 to move along the gap between the connecting part 2 and the aluminum alloy plate 3, and use the welding gun 4 to weld and fix the connecting part 2 and the aluminum alloy plate 3 to form a weld between the two. During this process, keep the motor 71 in the started state to drive the second knocking component 9 to rotate at a certain speed; since the fixing frame 6 and the welding gun 4 are connected, the fixing frame 6 will also move with the welding gun 4, so that the first knocking component 8 gradually approaches the weld and finally moves to the top of the weld, and then, the rotating second knocking component 9 will hammer on the top of the first knocking component 8, and the first knocking component 8 will directly transfer the hammering force of the second knocking component 9 on its top to the weld, thereby realizing the operation of eliminating weld stress.

[0054] In the above scheme, by setting up the first knocking component 8 and the second knocking component 9, on the one hand, the motor 71 is used to drive the second knocking component 9 to rotate at a certain speed, and the second knocking component 9 knocks the top of the first knocking component 8 every time it rotates a certain angle, so that the technical purpose of eliminating the stress of the weld can be achieved by knocking; on the other hand, the first knocking component 8 is set vertically, which means that the first knocking component 8 can knock vertically at the contact position between it and the weld. The advantage of vertically knocking the weld is that it has a better stress elimination effect and better uniformity of the plastic deformation of the weld.

[0055] The second knocking assembly 9 includes a hinge seat 91, a connecting rod 93, a torsion spring 95 and a knocking column 94; one end of the connecting rod 93 is connected to the hinge shaft 92 on the hinge seat 91, so that the connecting rod 93 can rotate around the axis of the hinge shaft 92; the torsion spring 95 is sleeved on the hinge shaft 92, and two torsion springs 95 are provided, and are respectively provided on both sides of the connecting rod 93. The two torsion springs 95 act together on the same connecting rod 93, and the knocking column 94 is fixedly connected to the other end of the connecting rod 93; the axis of the knocking column 94 is parallel to the axis of the second rotating shaft 74, and the axial length of the knocking column 94 is greater than the width of the weld; the knocking column 94 is used to knock the first knocking assembly 8 on the one hand, and on the other hand, it is used to knock the area of ​​the connecting part 2 and the aluminum alloy plate 3 close to the weld.

[0056] In the above scheme, by providing a torsion spring 95 and a knocking column 94 whose axial length is greater than the width of the weld, on the one hand, the knocking column 94 can knock on the top of the first knocking assembly 8, so that the first knocking assembly 8 can knock on the center position of the weld; on the other hand, when the knocking column 94 contacts the top of the first knocking assembly 8, the second rotating shaft 74 will continue to rotate, and the knocking column 94 will stay on the top of the first knocking assembly 8 for a period of time. At this time, the torsion spring 95 will generate a certain torsion force. When the knocking column 94 is separated from the top of the first knocking assembly 8, the torsion force will push the knocking column 94 to hit the area of ​​the connector 2 and the aluminum alloy plate 3 near the weld, achieving a second knocking. In this way, the stress concentration in the transition zone between the weld and the connector 2 and the aluminum alloy plate 3 can be alleviated, making up for the limitations of simply knocking on the weld. That is, the present technical solution can achieve double knocking on the center and edge of the weld using a driving source, and its stress relief effect is good.

[0057] The first striking assembly 8 comprises a striking ball 81, an extension rod 82, and a spring sheet 83. The extension rod 82 is vertically arranged, with its bottom end fixedly connected to the striking ball 81. One end of the spring sheet 83 is fixedly connected to the top of the extension rod 82, and the other end of the spring sheet 83 is fixedly connected to the fixing frame 6 via a fixing seat 84. The spring sheet 83 functions to push the first striking assembly 8 so that the bottom end of the striking ball 81 can be pressed against the center of the weld with a certain force, thereby avoiding a gap between the striking ball 81 and the weld.

[0058] The drive assembly 7 further includes a first gear 73 and a second gear 75 in meshing connection. A first rotating shaft 72 is coaxially fixed to the first gear 73, and a second rotating shaft 74 is coaxially fixed to the second gear 75. The first rotating shaft 72 is coaxially fixed to the output shaft of the motor 71. A housing 76 is fixed to the fixed frame 6, and a sealing cover 77 is fixed to the end of the housing 76 away from the fixed frame 6. The first gear 73 and the second gear 75 are both disposed within the housing 76. Specifically, a sealed space is formed between the housing 76, the sealing cover 77, and the fixed plate 61, and the first gear 73 and the second gear 75 are disposed within this sealed space.

[0059] The distance adjustment structure between the fixing frame 6 and the welding gun 4 is as follows:

[0060] A horizontal adjustment component 5 is provided between the fixed frame 6 and the welding gun 4. The horizontal adjustment component 5 includes a guide rod 52 and a guide sleeve 51. Two guide rods 52 are provided, so as to prevent the guide sleeve 51 from rotating around the guide rod 52. The guide sleeve 51 is slidably sleeved on the guide rod 52. One end of the guide rod 52 is fixedly connected to the welding gun 4 through the fixed sleeve 54; the other end of the guide rod 52 is fixed with an end block 53 to prevent the guide sleeve 51 from slipping; a connecting plate 62 is fixed to the top of the fixing plate 61, and the guide sleeve 51 is fixed between the two connecting plates 62.

[0061] Furthermore, two guide sleeves 51 are provided, with a fastening block 57 disposed between the two guide sleeves 51. A clamping groove 58 is defined on one side of the fastening block 57 for accommodating the guide rod 52. A screw 55 is threadedly connected to the connecting plate 62 through a screw hole 59. One end of the screw 55 abuts against the other side of the fastening block 57, and the other end of the screw 55 is fixed to a handle rod 56. By rotating the screw 55, the friction between the inner surface of the clamping groove 58 and the guide rod 52 can be adjusted, thereby facilitating adjustment of the position of the guide sleeve 51 on the guide rod 52.

[0062] 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 and forming device for a motorcycle luggage box, comprising a welding gun for welding a connector fixed to a profile to an aluminum alloy plate, characterized in that: A fixing frame is provided at the rear side of the welding gun, and a driving assembly is provided on the fixing frame, and the driving assembly is used to drive a first knocking assembly to knock the weld formed between the connecting member and the aluminum alloy plate; The bottom end of the first striking component is pressed against the top of the weld, and the width of the bottom end of the first striking component is smaller than the width of the weld; The driving assembly includes a motor and a second rotating shaft, and the motor drives the second rotating shaft to rotate around its own axis; A second knocking assembly is provided on the second rotating shaft. The second knocking assembly rotates along with the second rotating shaft so that an end of the second knocking assembly away from the second rotating shaft knocks on the top of the first knocking assembly.

2. The welding and forming device for a motorcycle luggage box according to claim 1, characterized in that: The second striking assembly includes a hinge seat, a connecting rod and a torsion spring; One end of the connecting rod is connected to the hinge shaft on the hinge seat; The torsion spring is sleeved on the hinge shaft.

3. The welding and forming device for a motorcycle luggage box according to claim 2, characterized in that: The second knocking assembly further includes a knocking column, which is fixedly connected to the other end of the connecting rod; The axis of the knocking column is parallel to the axis of the second rotating shaft, and the axial length of the knocking column is greater than the width of the weld.

4. The welding and forming device for a motorcycle luggage box according to claim 1, characterized in that: The first striking component includes a striking ball, an extension rod and a spring sheet; The extension rod is arranged vertically, and the bottom end thereof is fixedly connected to the knocking ball; One end of the spring sheet is fixedly connected to the top end of the extension rod, and the other end of the spring sheet is fixedly connected to the fixing bracket via a fixing seat.

5. The welding and forming device for a motorcycle luggage box according to claim 4, characterized in that: The fixing frame includes two fixing plates arranged opposite to each other; The second rotating shaft is rotatably connected between the two fixing plates, and the second knocking assembly is arranged between the two fixing plates; The fixing seat is fixed between the two fixing plates.

6. The welding and forming device for a motorcycle luggage box according to claim 5, characterized in that: A plastic pad is provided at the bottom end of the fixing plate, a pin hole is opened on the upper surface of the plastic pad, a latch is fixed at the bottom end of the fixing plate, and the latch is interference-fitted inside the pin hole.

7. The welding and forming device for a motorcycle luggage box according to claim 1, characterized in that: The drive assembly further includes a first gear and a second gear meshingly connected, wherein a first rotating shaft is coaxially fixed to the first gear, and the second gear is coaxially fixed to the second rotating shaft, and the first rotating shaft is coaxially fixed to the output shaft of the motor; A shell is fixed on the fixing frame, a sealing cover is fixed on one end of the shell away from the fixing frame, and the first gear and the second gear are both arranged inside the shell.

8. The welding and forming device for a motorcycle luggage box according to claim 5, characterized in that: A horizontal adjustment assembly is provided between the fixing frame and the welding gun, the horizontal adjustment assembly comprising a guide rod and a guide sleeve, the guide sleeve being slidably sleeved on the guide rod, and one end of the guide rod being fixedly connected to the welding gun via a fixing sleeve; A connecting plate is fixed to the top of the fixing plate, and the guide sleeve is fixed between the two connecting plates; An end block is fixed on the other end of the guide rod.

9. The welding and forming device for a motorcycle luggage box according to claim 8, characterized in that: Two guide sleeves are provided, and a fastening block is provided between the two guide sleeves. A clamping groove for accommodating the guide rod is opened on one side of the fastening block. A screw is threadedly connected to the connecting plate through a screw hole. One end of the screw is against the other side of the fastening block, and a handle rod is fixed to the other end of the screw.

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