Welding clamp and welding method for trailer axle hanging plate

Abstract

The invention provides a trailer axle hanging plate welding clamp and a welding method.The trailer axle hanging plate welding clamp comprises a frame positioning and clamping device and further comprises a hole welding positioning and clamping device, a side line welding and clamping device, a bottom plate, a sliding rail assembly and a driving device, and the frame positioning and clamping device is used for positioning and clamping a frame; the hole welding positioning and clamping device is used for positioning and clamping the hanging plate, the side line welding and clamping device is used for clamping the hanging plate, the bottom plate is installed on the sliding rail assembly in a sliding mode, the side line welding and clamping device is arranged on the bottom plate, and the driving device is used for driving the bottom plate to slide in the Y direction. And the side line welding clamping device is driven to slide in the Y direction relative to the sliding rail assembly. The welding deformation of the trailer axle hanging plate can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of trailer axle suspension welding, and particularly relates to a trailer axle suspension welding clamp and a welding method. BACKGROUND

[0002] The trailer is a very common type of vehicle in the current automobile industry, and the installation precision of the axle assembly in the chassis system of the trailer is the basis of the quality of the entire trailer and is also the most critical size precision control point. Therefore, the welding deformation control of the trailer axle suspension is particularly important. The existing trailer axle suspension welding clamp and welding method have the problem of large welding deformation of the trailer axle suspension during welding.

[0003] Therefore, it is necessary to develop a trailer axle suspension welding clamp and a welding method to reduce the welding deformation of the trailer axle suspension. SUMMARY

[0004] The present application relates to the technical field of trailer axle suspension welding, and particularly relates to a trailer axle suspension welding clamp and a welding method.

[0005] To solve the above technical problems, the present application provides a trailer axle suspension welding clamp, which comprises a frame positioning and clamping device, a hole welding positioning and clamping device, an edge line welding clamping device, a bottom plate, a slide rail assembly and a driving device. The frame positioning and clamping device is used for positioning and clamping the frame. The hole welding positioning and clamping device is used for positioning and clamping the suspension. The edge line welding clamping device is used for clamping the suspension. The bottom plate is slidably installed on the slide rail assembly. The edge line welding clamping device is arranged on the bottom plate. The driving device is used to drive the bottom plate to slide in the Y direction, so as to drive the edge line welding clamping device to slide in the Y direction relative to the slide rail assembly.

[0006] Optionally, the hole welding positioning and clamping device comprises a main positioning pin assembly, a secondary positioning pin assembly, a first floating block assembly and a second floating block assembly. The main positioning pin assembly and the secondary positioning pin assembly cooperate to position the suspension in the X direction and the Z direction. The first floating block assembly and the second floating block assembly press the suspension on the frame in the Y direction.

[0007] Optionally, the edge line welding clamping device comprises a first pneumatic clamping assembly, a second pneumatic clamping assembly and a manual clamping assembly. The first pneumatic clamping assembly, the manual clamping assembly and the second pneumatic clamping assembly are used to clamp the suspension in the Y direction. The first pneumatic clamping assembly, the manual clamping assembly and the second pneumatic clamping assembly are installed on the bottom plate.

[0008] Optionally, the first pneumatic clamping assembly comprises a first pneumatic support, a first rotary air cylinder, a first positioning block and a first pneumatic clamping block, the first pneumatic support is arranged on the bottom plate, the first rotary air cylinder is installed on the first pneumatic support, the first positioning block is installed on the first pneumatic support, and the first pneumatic clamping block is installed on the output end of the first rotary air cylinder; the first pneumatic clamping block is driven to rotate by the first rotary air cylinder, so that the first pneumatic clamping block and the first positioning block are close to each other, and then the first pneumatic clamping block and the first positioning block clamp the hanging plate in the Y direction.

[0009] Optionally, the second pneumatic clamping assembly comprises a second pneumatic support, a second rotary air cylinder, a second positioning block and a second pneumatic clamping block, the second pneumatic support is arranged on the bottom plate, the second rotary air cylinder is installed on the second pneumatic support, the second positioning block is installed on the second pneumatic support, and the second pneumatic clamping block is installed on the output end of the second rotary air cylinder; the second pneumatic clamping block is driven to rotate by the second rotary air cylinder, so that the second pneumatic clamping block and the second positioning block are close to each other, and then the second pneumatic clamping block and the second positioning block clamp the hanging plate in the Y direction.

[0010] Optionally, the manual clamping assembly comprises a manual support, a manual positioning block, a manual driving assembly and a manual clamping block, the manual support is installed on the bottom plate, the manual positioning block is installed on the manual support, and the manual driving assembly drives the manual clamping block to move towards the manual positioning block to clamp the hanging plate in the Y direction.

[0011] The application also provides a trailer axle hanging plate welding method using the above-mentioned trailer axle hanging plate welding clamp, which comprises the following steps: providing a hanging plate and a frame, wherein the frame comprises a steel truss and a steel plate arranged on the top of the steel truss; positioning and clamping the frame by the frame positioning and clamping device; mounting the hanging plate on the frame and positioning and clamping the hanging plate by the hole welding positioning and clamping device; welding the hanging plate to the steel truss of the frame along the hole group on the hanging plate; driving the bottom plate to slide in the Y direction by the driving device, so as to drive the edge line welding clamping device to slide in the Y direction relative to the slide rail assembly; clamping the hanging plate by the edge line welding clamping device; and welding the hanging plate to the steel truss and the steel plate of the frame along the line group on the hanging plate, respectively.

[0012] Optionally, in the process of welding the hanger plate along the hole group on the hanger plate to the steel truss of the vehicle frame and welding the hanger plate along the line group on the hanger plate to the steel truss and the steel plate of the vehicle frame respectively, the welding gap is 0.5-1.5 mm, the welding leg size is 4.0-8.4 mm, the welding is performed by adopting the mode of sectional welding first and then sectional repair welding, the welding seam length is 20-25 mm, the welding current is 128-136 A, the welding voltage is 19.6-20.6 V, and the welding speed is 20-25 cm / min.

[0013] Optionally, the hanger plate and the vehicle frame further comprise that the hanger plate has a main plate surface and a top surface perpendicular to the main plate surface, the main plate surface of the hanger plate is provided with a first waist-shaped hole, a round hole, a second waist-shaped hole and a third waist-shaped hole, the steel truss has a circular tubular boss on each side surface, the axis of the circular tubular boss is parallel to the steel plate, the hanger plate is installed on the side surface of the steel truss, the circular tubular boss is inserted into the round hole and cooperates with the round hole, and the top surface of the hanger plate is in contact with the steel plate.

[0014] Optionally, in the process of welding the hanger plate along the hole group on the hanger plate to the steel truss of the vehicle frame, the hole group comprises the first waist-shaped hole, the round hole, the second waist-shaped hole and the third waist-shaped hole, and in the welding process, the round hole and the second waist-shaped hole located between the first waist-shaped hole and the third waist-shaped hole are welded first, and then the first waist-shaped hole and the third waist-shaped hole are welded.

[0015] The hanger plate welding clamp and the welding method have the following beneficial effects: Since the bottom plate is slidably installed on the slide rail assembly, the driving device is used to drive the bottom plate to slide along the Y direction, the edge line welding clamping device is arranged on the bottom plate, and thus the bottom plate can be driven to slide along the Y direction by the driving device, and the edge line welding clamping device is driven to move along the Y direction, when the edge line welding clamping device needs to clamp the hanger plate, the edge line welding clamping device can be moved to a first predetermined position, when the edge line welding clamping device needs to avoid the position of the welding gun for the hole on the hanger plate, the edge line welding clamping device can be moved to a second predetermined position, and thus the hanger plate has better parallelism after being welded on the vehicle frame, and the welding deformation of the hanger plate is avoided, and the process content is integrated, the investment is saved, and the production efficiency is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structure schematic view of the hanger plate in the embodiment of the application; Figure 2 is a structure schematic view of the hanger plate welded on the vehicle frame in the embodiment of the application; Figure 3 is a structure schematic view of the hanger plate welded on the vehicle frame in the embodiment of the application; Figure 4 is a structural schematic diagram of one perspective in the welding of the hanging plate and the frame in the embodiment of the present application; Figure 5 is a structural schematic diagram of another perspective in the welding of the hanging plate and the frame in the embodiment of the present application; Figure 6 is a structural schematic diagram of the welding fixture of the hanging plate of the trailer axle in the embodiment of the present application; Figure 7 is a structural schematic diagram of the hole welding positioning and clamping device in the embodiment of the present application; Figure 8 is a structural schematic diagram of the edge line welding clamping device, the bottom plate, the slide rail assembly and the driving device in the embodiment of the present application; Figure 9 is a structural schematic diagram of the support auxiliary tool in the embodiment of the present application.

[0017] Explanation of reference signs: 110 - hanging plate; 111 - main plate surface; 112 - top surface; 113 - first waist-shaped hole; 114 - round hole; 115 - second waist-shaped hole; 116 - third waist-shaped hole; 120 - frame; 121 - steel truss; 122 - round tubular boss; 123 - steel plate; 200 - frame positioning and clamping device; 300 - hole welding positioning and clamping device; 311 - main support; 312 - main positioning pin; 321 - secondary support; 322 - secondary positioning pin; 330 - first floating pressing block assembly; 340 - second floating pressing block assembly; 400 - edge line welding clamping device; 411 - first pneumatic support; 412 - first rotary air cylinder; 413 - first positioning block; 414 - first pneumatic clamping block; 421 - second pneumatic support; 422 - second rotary air cylinder; 423 - second positioning block; 424 - second pneumatic clamping block; 431 - manual support; 432 - manual positioning block; 433 - manual driving assembly; 434 - manual clamping block; 500 - bottom plate; 600 - slide rail assembly; 700 - driving device; 810 - first limiting block; 820 - second limiting block; 900 - auxiliary support; 910 - support rod; 920 - support plate; 930 - support block. DETAILED DESCRIPTION

[0018] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0020] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0021] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0022] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0023] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] Reference Figure 1 , Figure 2 ,Figure 3 、 Figure 4 and Figure 5 , Figure 1 is a structural schematic diagram of the hanger plate 110 in the embodiment of the present application, Figure 2 is a structural schematic diagram of the hanger plate 110 welded to the frame 120 in the embodiment of the present application, Figure 3 is a structural schematic diagram of the hanger plate 110 welded to the frame 120 in the embodiment of the present application, Figure 4 is a structural schematic diagram of one perspective of the welding of the hanger plate 110 and the frame 120 in the embodiment of the present application, Figure 5 is a structural schematic diagram of another perspective of the welding of the hanger plate 110 and the frame 120 in the embodiment of the present application, and two hanger plates 110 are needed to be welded to the two sides of the frame 120 in the embodiment. The hanger plate 110 has a main plate surface 111 and a top surface 112 perpendicular to the main plate surface 111. The main plate surface 111 of the hanger plate 110 is provided with a first waist-shaped hole 113, a round hole, a second waist-shaped hole 115 and a third waist-shaped hole 116. The frame 120 includes a steel truss 121 and a steel plate 123 arranged on the top of the steel truss 121. The steel truss 121 has a circular tubular boss 122 on each side. The axis of the circular tubular boss 122 is parallel to the steel plate 123. The hanger plate 110 is installed on the side of the steel truss 121. The circular tubular boss 122 is inserted into the round hole and cooperates with the round hole. The top surface 112 of the hanger plate 110 is in contact with the steel plate 123.

[0025] In the embodiment, the hanger plate 110 is welded to the side of the steel truss 121 along the hole wall of the first waist-shaped hole 113, the second waist-shaped hole 115 and the third waist-shaped hole 116. The hanger plate 110 is welded to the circular tubular boss 122 along the round hole. The hanger plate 110 is welded to the steel truss 121 along the first waist-shaped hole 113, the second waist-shaped hole 115 and the third waist-shaped hole 116. The hanger plate 110 is welded to the steel plate 123 along the outer edge line of the top surface 112 of the hanger plate 110. The hanger plate 110 is welded to the steel truss 121 along the line angle of the side of the hanger plate 110 in contact with the steel truss 121 and intersecting with the bottom of the steel truss 121.

[0026] In order to realize the above welding, refer to Figure 6 、 Figure 7 、 Figure 8 and Figure 9 , Figure 6 is a structural schematic diagram of the hanger plate welding clamp of the trailer axle in the embodiment of the present application, Figure 7 is a structural schematic diagram of the hole welding positioning and clamping device 300 in the embodiment of the present application, Figure 8is a structural schematic view of the edge line welding clamping device 400, the bottom plate 500, the slide rail assembly 600 and the driving device 700 in the embodiment of the present application, Figure 9 is a structural schematic view of the support auxiliary tool in the embodiment of the present application, and the embodiment provides a trailer axle suspension welding clamp, which comprises a frame positioning and clamping device 200, a hole welding positioning and clamping device 300, an edge line welding clamping device 400, a bottom plate 500, a slide rail assembly 600 and a driving device 700. The frame positioning and clamping device 200 is used for positioning and clamping the frame 120. The hole welding positioning and clamping device 300 is used for positioning and clamping the suspension 110. The edge line welding clamping device 400 is used for clamping the suspension 110. The bottom plate 500 is slidably installed on the slide rail assembly 600. The edge line welding clamping device 400 is arranged on the bottom plate 500. The driving device 700 is used for driving the bottom plate 500 to slide along the Y direction, so as to drive the edge line welding clamping device 400 to slide along the Y direction relative to the slide rail assembly 600.

[0027] Since the bottom plate 500 is slidably installed on the slide rail assembly 600, the driving device 700 is used for driving the bottom plate 500 to slide along the Y direction, and the edge line welding clamping device 400 is arranged on the bottom plate 500, so that the bottom plate 500 can be driven to slide along the Y direction relative to the slide rail assembly 600 by the driving device 700, and the edge line welding clamping device 400 can be driven to move along the Y direction. When the edge line welding clamping device 400 needs to clamp the suspension 110, the edge line welding clamping device 400 can be moved to a first predetermined position. When the edge line welding clamping device 400 needs to avoid the position of the welding gun for welding the hole on the suspension 110, the edge line welding clamping device 400 can be moved to a second predetermined position. In this way, after the suspension 110 is welded on the frame 120, the suspension 110 has good parallelism, and the welding deformation of the suspension 110 is avoided. Meanwhile, the process content is integrated, the investment is saved, and the production efficiency is ensured.

[0028] The frame positioning and clamping device 200 can adopt a common frame 120 positioning and clamping device, and the embodiment will not be described in detail.

[0029] Reference Figure 6 The hole welding positioning and clamping device 300 comprises a main positioning pin 312 assembly, a secondary positioning pin 322 assembly, a first floating pressing block assembly 330 and a second floating pressing block assembly 340. The main positioning pin 312 assembly and the secondary positioning pin 322 assembly are matched to position the X direction and the Z direction of the suspension 110. The first floating pressing block assembly 330 and the second floating pressing block assembly 340 press the suspension 110 on the frame 120 along the Y direction.

[0030] In the embodiment, the X direction refers to the direction of travel of the vehicle, i.e. the extension direction of the two sides of the vehicle frame 120, and is also the direction parallel to the intersection line of the first step surface and the first vertical surface of the vehicle frame 120; the Z direction refers to the vertical direction; and the Y direction refers to the direction perpendicular to the direction of travel of the vehicle and horizontal, i.e. the direction perpendicular to the intersection line of the first step surface and the first vertical surface of the vehicle frame 120 and parallel to the horizontal plane.

[0031] The main positioning pin 312 assembly includes a main support 311 and a main positioning pin 312, and the main positioning pin 312 is arranged on the main support 311.

[0032] The secondary positioning pin 322 assembly includes a secondary support 321 and a secondary positioning pin 322, and the secondary positioning pin 322 is arranged on the secondary support 321.

[0033] The first floating block assembly 330 is arranged on the main support 311. The main support 311 is provided with a first threaded hole, and the first floating block assembly is provided with a first external thread matched with the first threaded hole. The first floating block assembly is pressed against the hanger plate 110 by manually rotating the first floating block assembly.

[0034] The second floating block assembly 340 is arranged on the secondary support 321. The secondary support 321 is provided with a second threaded hole, and the second floating block assembly is provided with a second external thread matched with the second threaded hole. The second floating block assembly is pressed against the hanger plate 110 by manually rotating the second floating block assembly.

[0035] Reference Figure 7 The edge welding clamping device 400 includes a first pneumatic clamping assembly, a second pneumatic clamping assembly and a manual clamping assembly. The first pneumatic clamping assembly, the manual clamping assembly and the second pneumatic clamping assembly are used to clamp the hanger plate 110 in the Y direction, and are installed on the bottom plate 500. By arranging the first pneumatic clamping assembly, the second pneumatic clamping assembly and the manual clamping assembly, the deformation of the part of the hanger plate 110 that is not in contact with the steel truss 121, i.e. the overhanging part of the hanger plate 110 relative to the steel truss 121, can be effectively prevented.

[0036] Specifically, the first pneumatic clamping assembly includes a first pneumatic support 411, a first rotary air cylinder 412, a first positioning block 413, and a first pneumatic clamping block 414. The first pneumatic support 411 is arranged on the bottom plate 500. The first rotary air cylinder 412 is mounted on the first pneumatic support 411. The first positioning block 413 is mounted on the first pneumatic support 411. The first pneumatic clamping block 414 is mounted on the output end of the first rotary air cylinder 412. The first pneumatic clamping block 414 is driven to rotate by the first rotary air cylinder 412, so that the first pneumatic clamping block 414 and the first positioning block 413 are close to each other, and then the first pneumatic clamping block 414 and the first positioning block 413 clamp the hanging plate 110 in the Y direction.

[0037] The second pneumatic clamping assembly includes a second pneumatic support 421, a second rotary air cylinder 422, a second positioning block 423, and a second pneumatic clamping block 424. The second pneumatic support 421 is arranged on the bottom plate 500. The second rotary air cylinder 422 is mounted on the second pneumatic support 421. The second positioning block 423 is mounted on the second pneumatic support 421. The second pneumatic clamping block 424 is mounted on the output end of the second rotary air cylinder 422. The second pneumatic clamping block 424 is driven to rotate by the second rotary air cylinder 422, so that the second pneumatic clamping block 424 and the second positioning block 423 are close to each other, and then the second pneumatic clamping block 424 and the second positioning block 423 clamp the hanging plate 110 in the Y direction.

[0038] The manual clamping assembly includes a manual support 431, a manual positioning block 432, a manual drive assembly 433, and a manual clamping block 434. The manual support 431 is mounted on the bottom plate 500. The manual positioning block 432 is mounted on the manual support 431. The manual drive assembly 433 drives the manual clamping block 434 to move towards the manual positioning block 432 to clamp the hanging plate 110 in the Y direction.

[0039] The trailer axle hanging plate welding fixture further includes a first limiting block 810 and a second limiting block 820. The first limiting block 810 and the second limiting block 820 are matched with the bottom plate 500 respectively to limit the stroke of the driving device 700 pushing the bottom plate 500 to slide, so as to prevent the bottom plate 500 from sliding out of the sliding assembly.

[0040] The trailer axle suspension plate welding fixture further comprises an auxiliary support 900 installed between the two suspension plates 110, which prevents the deformation of the suspension plates 110 and causes the opening size L of the suspension plates 110 to be reduced. The auxiliary support 900 and the edge line welding clamping device 400 together prevent the deformation of the suspension plates 110 in the process of welding the suspension plates 110 along the outer edge line of the top surface 112 of the suspension plates 110 to the steel plate 123 and welding the suspension plates 110 along the line intersecting the bottom of the steel truss 121 on the side surface of the suspension plates 110 in contact with the steel truss 121.

[0041] Specifically, the auxiliary support 900 comprises a support rod 910, two support plates 920 and two support blocks 930, the two support plates 920 are respectively installed on the support rod 910, and the two support blocks 930 are respectively installed on the two support plates 920, and the side of the support block 930 away from the support rod 910 is in contact with the suspension plate 110.

[0042] The driving device 700 is a pneumatic cylinder.

[0043] The embodiment also provides a trailer axle suspension plate welding method using the trailer axle suspension plate welding fixture in the above embodiment, which comprises the following steps: A suspension plate 110 and a frame 120 are provided, and the frame 120 comprises a steel truss 121 and a steel plate 123 arranged on the top of the steel truss 121; The frame 120 is positioned and clamped by the frame positioning and clamping device 200; The suspension plate 110 is installed on the frame 120 and positioned and clamped by the hole welding positioning and clamping device 300; The suspension plate 110 is welded along the hole group on the suspension plate 110 to the steel truss 121 of the frame 120; The bottom plate 500 is driven to slide along the Y direction by the driving device 700, so as to drive the edge line welding clamping device 400 to slide along the Y direction relative to the slide rail assembly 600; The suspension plate 110 is clamped by the edge line welding clamping device 400; The suspension plate 110 is welded along the line group on the suspension plate 110 to the steel truss 121 and the steel plate 123 of the frame 120, respectively.

[0044] By positioning and clamping the hanging plate 110 first, and welding the hole group, then continuing to clamp the hanging plate 110 to prevent deformation in the process of welding the wire group, the deformation of the hanging plate 110 and the frame 120 in the welding process can be effectively prevented. In addition, by driving the bottom plate 500 to slide along the Y direction relative to the sliding assembly through the driving device 700, and then driving the edge wire welding clamping device 400 to move along the Y direction, when the edge wire welding clamping device 400 needs to clamp the hanging plate 110, the edge wire welding clamping device 400 can be moved to a first predetermined position, and when the edge wire welding clamping device 400 needs to avoid the position of the welding gun for the hole on the hanging plate 110, the edge wire welding clamping device 400 can be moved to a second predetermined position. In this way, after the hanging plate 110 is welded on the frame 120, it has good parallelism, avoids deformation of the hanging plate 110 during welding, and integrates the process content, saves investment and ensures production efficiency.

[0045] In the process of welding the hanging plate 110 along the hole group on the hanging plate 110 to the steel truss 121 of the frame 120 and welding the hanging plate 110 along the wire group on the hanging plate 110 to the steel truss 121 and the steel plate 123 of the frame 120 respectively, the material of the frame 120 is QSTE700TM with a thickness of 4.0mm, and the material of the hanging plate 110 is DL590 with a thickness of 7.0mm. The welding gap is 0.5-1.5mm, the welding leg size is 4.0-8.4mm, the welding method is segmental welding followed by segmental repair welding, the welding seam length is 20-25mm, the welding current is 128-136A, the welding voltage is 19.6-20.6V, and the welding speed is 20-25cm / min.

[0046] In the process of welding the hanging plate 110 along the hole group on the hanging plate 110 to the steel truss 121 of the frame 120 and welding the hanging plate 110 along the wire group on the hanging plate 110 to the steel truss 121 and the steel plate 123 of the frame 120 respectively, the material of the frame 120 is QSTE700TM with a thickness of 4.0mm, and the material of the hanging plate 110 is DL590 with a thickness of 7.0mm. The welding gap is 0.5-1.5mm, the welding leg size is 4.0-8.4mm, the welding method is segmental welding followed by segmental repair welding, the welding seam length is 20-25mm, the welding current is 128-136A, the welding voltage is 19.6-20.6V, and the welding speed is 20-25cm / min.

[0047] In the process of welding the hanging plate 110 along the hole group on the hanging plate 110 to the steel truss 121 of the frame 120 and welding the hanging plate 110 along the wire group on the hanging plate 110 to the steel truss 121 and the steel plate 123 of the frame 120 respectively, the material of the frame 120 is QSTE700TM with a thickness of 4.0mm, and the material of the hanging plate 110 is DL590 with a thickness of 7.0mm. The welding gap is 0.5-1.5mm, the welding leg size is 4.0-8.4mm, the welding method is segmental welding followed by segmental repair welding, the welding seam length is 20-25mm, the welding current is 128-136A, the welding voltage is 19.6-20.6V, and the welding speed is 20-25cm / min.

[0048] In the process of welding the hanger plate 110 to the steel truss 121 and the steel plate 123 of the frame 120 along the line groups on the hanger plate 110, the outer edge line of the top surface 112 of the hanger plate 110, the line intersecting the bottom of the steel truss 121 on the side of the hanger plate 110 contacting the side surface of the steel truss 121, and the line intersecting the bottom of the steel plate 123 on the side of the hanger plate 110 contacting the side surface of the steel plate 123 are welded simultaneously along the two lines from the middle to the outside in sections and then welded in sections to finally achieve full welding.

[0049] In the process of welding the hanger plate 110 to the steel truss 121 and the steel plate 123 of the frame 120 along the line groups on the hanger plate 110, the outer edge line of the top surface 112 of the hanger plate 110, the line intersecting the bottom of the steel truss 121 on the side of the hanger plate 110 contacting the side surface of the steel truss 121, and the line intersecting the bottom of the steel plate 123 on the side of the hanger plate 110 contacting the side surface of the steel plate 123 are welded simultaneously along the two lines from the middle to the outside in sections and then welded in sections to finally achieve full welding.

[0050] The applicant takes the frame 120 with the material of QSTE700TM and the thickness of 4.0mm and the hanger plate 110 with the material of DL590 and the thickness of 7.0mm as the welding objects, adopts different welding gaps, weld sizes, weld lengths, welding currents, welding voltages and welding speeds, and carries out three groups of tests to demonstrate the effect of the trailer axle hanger plate welding method in the embodiment.

[0051] As shown in the following table, when the welding process parameters of test 2 are selected, the welding deformation is small (the opening size L=1347mm, qualified) and the weld has no cracks after strength detection. When the welding process parameters of test 1 are adopted, the welding workload and heat input are more, and the deformation is large (the opening size L=1344mm, out of tolerance). When the welding process parameters of test 3 are adopted, the welding deformation is small (the opening size L=1346mm, qualified), but the weld has cracks after strength detection, which has the risk of open welding. The above description is only a description of the preferred embodiment of the present application, and is not any limitation on the scope of the present application. Any modification made by a person skilled in the art according to the above disclosure is within the protection scope of the claims.

Claims

1. A welding fixture for trailer axle mounting plates, comprising a frame positioning and clamping device, characterized in that, It also includes a hole welding positioning and clamping device, an edge welding clamping device, a base plate, a slide rail assembly, and a drive device. The frame positioning and clamping device is used to position and clamp the frame, the hole welding positioning and clamping device is used to position and clamp the mounting plate, the edge welding clamping device is used to clamp the mounting plate, and the base plate is slidably mounted on the slide rail assembly. The edge welding clamping device is disposed on the base plate, and the drive device is used to drive the base plate to slide along the Y direction, so as to drive the edge welding clamping device to slide relative to the slide rail assembly along the Y direction.

2. The trailer axle mounting plate welding fixture as described in claim 1, characterized in that, The hole welding positioning clamping device includes a main positioning pin assembly, a secondary positioning pin assembly, a first floating pressure block assembly, and a second floating pressure block assembly. The main positioning pin assembly and the secondary positioning pin assembly cooperate to position the mounting plate in the X and Z directions. The first floating pressure block assembly and the second floating pressure block assembly press the mounting plate onto the vehicle frame along the Y direction.

3. The trailer axle mounting plate welding fixture as described in claim 1, characterized in that, The edge welding clamping device includes a first pneumatic clamping assembly, a second pneumatic clamping assembly, and a manual clamping assembly. The first pneumatic clamping assembly, the manual clamping assembly, and the second pneumatic clamping assembly are used to clamp the hanging plate in the Y direction. The first pneumatic clamping assembly, the manual clamping assembly, and the second pneumatic clamping assembly are mounted on the base plate.

4. The trailer axle mounting plate welding fixture as described in claim 3, characterized in that, The first pneumatic clamping assembly includes a first pneumatic support, a first rotary cylinder, a first positioning block, and a first pneumatic clamping block. The first pneumatic support is disposed on the base plate, the first rotary cylinder is mounted on the first pneumatic support, the first positioning block is mounted on the first pneumatic support, and the first pneumatic clamping block is mounted on the output end of the first rotary cylinder. The first pneumatic clamping block is driven to rotate by the first rotary cylinder, so that the first pneumatic clamping block and the first positioning block move closer to each other, thereby clamping the hanging plate in the Y direction by the first pneumatic clamping block and the first positioning block.

5. The trailer axle mounting plate welding fixture as described in claim 3, characterized in that, The second pneumatic clamping assembly includes a second pneumatic support, a second rotary cylinder, a second positioning block, and a second pneumatic clamping block. The second pneumatic support is disposed on the base plate, the second rotary cylinder is mounted on the second pneumatic support, the second positioning block is mounted on the second pneumatic support, and the second pneumatic clamping block is mounted on the output end of the second rotary cylinder. The second pneumatic clamping block is driven to rotate by the second rotary cylinder, so that the second pneumatic clamping block and the second positioning block move closer to each other, thereby clamping the hanging plate in the Y direction by the second pneumatic clamping block and the second positioning block.

6. The trailer axle mounting plate welding fixture as described in claim 3, characterized in that, The manual clamping assembly includes a manual support, a manual positioning block, a manual drive assembly, and a manual clamping block. The manual support is mounted on the base plate, the manual positioning block is mounted on the manual support, and the manual drive assembly drives the manual clamping block to move toward the manual positioning block to clamp the hanging plate in the Y direction.

7. A method for welding trailer axle brackets using a welding fixture for trailer axle brackets as described in any one of claims 1-6, characterized in that, include: A mounting plate and a vehicle frame are provided, the vehicle frame including a steel truss and a steel plate disposed on top of the steel truss; The frame is positioned and clamped using a frame positioning and clamping device; The mounting plate is installed onto the frame, and the mounting plate is positioned and clamped by welding a positioning and clamping device through holes; The mounting plate is welded to the steel truss of the vehicle frame along the holes on the mounting plate; The base plate is driven to slide along the Y direction by the drive device, so as to drive the edge welding clamping device to slide relative to the slide rail assembly along the Y direction. The hanging plate is clamped by the edge welding clamping device; The mounting plates are welded to the steel truss and steel plate of the vehicle frame along the mounting plate inline assembly.

8. The method for welding trailer axle mounting plates as described in claim 7, characterized in that, During the process of welding the mounting plate along the holes on the mounting plate to the steel truss of the vehicle frame and welding the mounting plate along the wires on the mounting plate to the steel truss and steel plate of the vehicle frame respectively, the welding gap is 0.5-1.5mm, the weld leg size is 4.0-8.4mm, the welding is carried out by first welding in sections and then repairing the welding in sections, the weld length is 20-25mm, the welding current is 128-136A, the welding voltage is 19.6-20.6V, and the welding speed is 20-25cm / min.

9. The method for welding trailer axle mounting plates as described in claim 7, characterized in that, A mounting plate and a frame are provided, the mounting plate having a main plate surface and a top surface perpendicular to the main plate surface. The main plate surface of the mounting plate has a first oblong hole, a round hole, a second oblong hole and a third oblong hole. The two sides of the steel truss each have a cylindrical boss, the axis of the cylindrical boss is parallel to the steel plate. The mounting plate is installed on the side of the steel truss, the cylindrical boss is inserted into the round hole and cooperates with the round hole, and the top surface of the mounting plate is in contact with the steel plate.

10. The method for welding trailer axle mounting plates as described in claim 9, characterized in that, The mounting plate is welded to the steel truss of the vehicle frame along the hole group on the mounting plate. The hole group includes a first waist-shaped hole, a round hole, a second waist-shaped hole, and a third waist-shaped hole. During the welding process, the round hole and the second waist-shaped hole located between the first waist-shaped hole and the third waist-shaped hole are welded in sequence first, and then the first waist-shaped hole and the third waist-shaped hole are welded in sequence.

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