A welding fixture for automobile parts

Abstract

The present invention relates to the field of welding clamping technology, and discloses a welding fixture for automobile parts, including a supporting unit, a centering adjustment unit and a clamping and fixing unit. When the electric push rod of the present invention pushes the sliding rod to slide, the sliding rod drives the rocker arm at the end to rotate around the rotation center, and the position of the top block on the rocker arm changes, and the top block drives the push rod to move inside the supporting beam, and the push rod can drive the X-axis pressure plate to slide inside, and then push the workpiece on the supporting beam forward and backward, and the movement of the push rod can also drive the connecting plate to slide synchronously, and the slide plate on the connecting plate slides along the inclined pressing groove at this time, and the Y-axis pressure plate can be pushed to move toward the side wall of the supporting beam through the guiding effect of the pressing groove, and the workpiece on the supporting beam can be pushed left and right, and the workpiece is automatically located at the center of the supporting beam through the mutual combination of front and back extrusion and left and right extrusion, and no manual adjustment is required, and the operation is simpler.

Description

Technical Field

[0001] The invention belongs to the technical field of welding clamping, and in particular relates to a welding fixture for automobile parts. Background Art

[0002] In the field of automobile manufacturing, the welding quality of automobile parts is directly related to the safety and reliability of the whole vehicle. With the continuous development of the automobile industry, the welding accuracy and efficiency of automobile parts are required to be higher and higher, and the fixture is required to clamp the workpiece as a whole during the welding process.

[0003] It is found during the use of existing welding fixtures that after placing the workpiece on the support frame, the operator needs to specifically adjust the welding position to ensure that the workpiece is located at the center of the support frame, which makes the overall clamping operation process more complicated. In addition, during the use of the fixture with relative movement of the upper and lower clamps, the workpiece needs to be pushed horizontally to the specified position for installation, because the installation path in the up and down directions is blocked by the clamps. However, the lateral installation method makes it easy for the bottom of the workpiece to be scratched during the sliding process, causing damage, affecting the quality of the workpiece.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0006] An automobile parts welding fixture comprises a support unit, a centering adjustment unit and a clamping and fixing unit; the support unit comprises a support base plate, on which a pair of support beams are vertically mounted;

[0007] The cam is provided with a plurality of sliding plates, and the cam is provided with a plurality of sliding plates, and the plurality of sliding plates are provided with a plurality of sliding plates.

[0008] The clamping and fixing unit includes a flip plate and a positioning cover, the flip plate is installed on the top of the rocker arm, a pair of Z-axis pressure plates are slidably installed on the flip plate, the positioning cover is installed on the side wall of the rocker arm, and a clamping groove is opened inside the positioning cover, the clamping groove and the strip groove are connected to each other, the width of the clamping groove and the strip groove and the diameter of the sliding rod are adapted to each other, after the strip groove is rotated to a vertical state, the clamping groove and the output end of the electric push rod are in the same straight line, the clamping groove is plugged with an insertion rod, a return spring is installed between the insertion rod and the positioning cover, a swing arm is rotatably installed at the end of the insertion rod, and the swing arm is rotatably connected to the Z-axis pressure plate.

[0009] As a preferred embodiment of the present invention, a support platform is installed at the bottom of the support base plate, and the support platform is installed on the welding table. A storage groove is opened on the surface of the support base plate, a support arm is installed at the bottom of the support beam, and a mounting plate is arranged at the bottom of the support arm, and the mounting plate is overlapped on the support base plate, and a locking bolt is screwed between the mounting plate and the support base plate.

[0010] As a preferred embodiment of the present invention, the electric push rod housing is installed at the bottom of the supporting beam, a U-shaped bracket is installed at the output end of the electric push rod, the U-shaped bracket is sleeved on the outside of the rocker arm, sliding rods are installed at both ends of the U-shaped bracket, and the rocker arm is in an inclined state.

[0011] As a preferred embodiment of the present invention, a rotating shaft is installed at the rotation center of the rocker arm, and positioning seats are rotatably installed at both ends of the rotating shaft. The positioning seats are welded to the side walls of the supporting beam, and a torsion spring is sleeved on the rotating shaft, and the two ends of the torsion spring are respectively clamped on the side walls of the positioning seat and the rocker arm.

[0012] As a preferred embodiment of the present invention, a guide groove is opened inside the supporting base plate, and the push rod is inserted into the guide groove, a guide wheel is installed at one end of one side of the push rod, and the guide wheel is slidably connected to the side wall of the top block, and a guide plate is installed at the other end of the push rod, and the guide plate is slidably installed in the guide groove, and a guide spring is clamped between the guide plate and the end surface of the guide groove, and the compression direction of the guide spring is on the same straight line as the moving direction of the push rod.

[0013] As a preferred embodiment of the present invention, a through groove is provided on the support base plate, the bottom of the through groove is communicated with the guide groove, and a vertical plate is slidably provided inside the through groove.

[0014] As a preferred embodiment of the present invention, an installation groove is provided on the side wall of the supporting beam, the installation groove and the guide groove are communicated with each other, and a pressing groove is provided on the inner wall of the installation groove, a pair of guide protrusions are slidably installed inside the pressing groove, the guide protrusions are connected to the side walls of the slide plate, the slide plate is slidably connected to the installation groove, a slide rail is installed on the back of the slide plate, the slide rail is slidably connected to the connecting plate, and the side wall of the connecting plate is slidably connected to the installation groove.

[0015] As a preferred embodiment of the present invention, a pair of limit grooves are provided on the flip plate, and a limit slider is slidably installed inside the pair of limit grooves, one end of the limit slider is interconnected with the Z-axis pressure plate, a limit rod is movably installed inside the limit slider, and both ends of the limit rod are installed on the inner wall of the limit groove, a limit spring is sleeved on the limit rod, one end of the limit spring is clamped on the inner wall of the limit groove, and the other end is clamped on the bottom of the limit slider.

[0016] As a preferred embodiment of the present invention, a synchronization rod is installed at the other end of the limit slider, a first fixed block is installed at the center position of the synchronization rod, the first fixed block is rotatably connected to the swing arm, a second fixed block is rotatably installed at the other end of the swing arm, and the second fixed block is interconnected with the end of the insertion rod.

[0017] As a preferred embodiment of the present invention, a synchronization plate is installed at the end of the insertion rod located in the inner cavity of the positioning cover, the size of the synchronization plate is adapted to the inner diameter of the positioning cover, a return spring is sleeved on the side wall of the insertion rod, the two ends of the return spring are respectively clamped on the side wall of the synchronization plate and the inner wall of the positioning cover, and a blocking plate is installed on the insertion rod located outside the positioning cover, and the blocking plate is attached to the side wall of the positioning cover.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] A centering adjustment unit is provided, wherein when the electric push rod pushes the sliding rod to slide, the sliding rod can drive the rocker arm at the end to rotate around the rotation center. When the rocker arm rotates, the position of the top block on the rocker arm changes, and the top block drives the top rod to move toward the inside of the supporting beam, and the top rod can drive the X-axis pressure plate to slide inward, thereby squeezing and pushing the workpiece on the supporting beam back and forth to ensure that the workpiece is located in the center of the supporting beam. The movement of the top rod can also drive the connecting plate to slide synchronously, and the slide plate on the connecting plate slides along the inclined pressing groove at this time, and the guiding effect of the pressing groove can push the Y-axis pressure plate at this time to move toward the side wall of the supporting beam, thereby squeezing and pushing the workpiece on the supporting beam left and right, and through the combination of front and back extrusion and left and right extrusion, it is ensured that the workpiece is automatically located in the center of the supporting beam, without manual adjustment, and the operation is simpler.

[0020] A clamping and fixing unit is provided, wherein when the electric push rod pushes the rocker arm to rotate to a vertical state, the Z-axis pressure plate on the rocker arm rotates to above the workpiece, thereby enabling the original left-right feeding method to be changed to a vertical feeding method, reducing the wear of the workpiece; when the rocker arm rotates to a vertical state, the slide bar at the end of the electric push rod moves to a horizontal clamping groove, and the rocker arm cannot rotate at this time, so the position of the rocker arm can be locked, and the insertion rod can be squeezed during the movement of the slide bar, and the insertion rod starts to move outward, and the Z-axis pressure plate at the end is driven by the rocker arm to slide downward along the flip plate, and the Z-axis pressure plate can move toward the surface of the workpiece, and the workpiece is clamped and fixed by the Z-axis pressure plate and the supporting beam, thereby achieving the purpose of positioning.

[0021] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In the attached picture:

[0023] Figure 1 It is a three-dimensional structural schematic diagram of a welding fixture for automobile parts;

[0024] Figure 2 A stereoscopic diagram of a welding fixture for automobile parts;

[0025] Figure 3 A schematic diagram of the partial structure of a welding fixture for automotive parts Figure 1 ;

[0026] Figure 4 A schematic diagram of the partial structure of a welding fixture for automotive parts Figure 2 ;

[0027] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0028] Figure 6 A schematic diagram of the partial structure of a welding fixture for automotive parts Figure 3 ;

[0029] Figure 7 A partial cross-section of a welding fixture for automotive parts Figure 1 ;

[0030] Figure 8 A partial cross-section of a welding fixture for automotive parts Figure 2 .

[0031] In the figure:

[0032] 100, support unit; 101, support substrate; 1011, support table; 1012, storage slot; 102, support beam; 1021, support arm; 1022, mounting plate;

[0033] 200, centering adjustment unit; 201, electric push rod; 2011, U-shaped bracket; 2012, slide bar; 202, rocker arm; 2021, strip groove; 2022, positioning seat; 2023, rotating shaft; 203, top block; 204, top rod; 2041, guide wheel; 2042, guide plate; 2043, guide groove; 2044, guide spring; 205, X-axis pressure plate; 2051, vertical plate; 2052, through groove; 206, connecting plate; 2061, slide rail; 207, Y-axis pressure plate; 2071, slide plate; 2072, mounting groove; 2073, pressing groove; 2074, guide protrusion;

[0034] 300, clamping and fixing unit; 301, flip plate; 3011, limit groove; 3012, limit rod; 3013, limit spring; 302, Z-axis pressure plate; 3021, limit slider; 3022, synchronization rod; 3023, first fixed block; 303, swing arm; 3031, second fixed block; 304, insertion rod; 3041, synchronization plate; 3042, return spring; 3043, blocking plate; 305, positioning cover; 3051, clamping groove. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0036] Embodiment 1, as Figures 1 to 8 As shown, a welding fixture for automobile parts includes a support unit 100, a centering adjustment unit 200 and a clamping and fixing unit 300. The support unit 100 includes a support base plate 101, on which a pair of support beams 102 are vertically mounted.

[0037] The centering adjustment unit 200 includes an electric push rod 201, a slide bar 2012 is installed at the output end of the electric push rod 201, a rocker arm 202 is installed on the side wall of the support beam 102, a strip groove 2021 is opened on the rocker arm 202, and the slide bar 2012 slides inside the strip groove 2021, a top block 203 is installed on the rocker arm 202, and the top block 203 is fan-shaped, and a top rod 204 is movably inserted inside the support beam 102, one end of the top rod 204 is slidably connected to the bottom of the top block 203, and a vertical plate 2051 is installed on the side wall of the top rod 204, and the top of the vertical plate 2051 An X-axis pressure plate 205 is installed, and during the rotation of the top block 203 and the rocker arm 202, the X-axis pressure plate 205 is driven to move toward the center of the supporting beam 102. A connecting plate 206 is installed on the side wall of the top rod 204. A slide plate 2071 is slidably installed on the side wall of the connecting plate 206, and a Y-axis pressure plate 207 is installed at the end of the slide plate 2071. The slide plate 2071 is slidably connected to the pressing groove 2073 opened on the inner wall of the supporting beam 102, and the pressing groove 2073 is in an inclined state. During the horizontal sliding of the top rod 204 and the connecting plate 206, the Y-axis pressure plate 207 is driven to move along The pressing groove 2073 moves toward the side wall of the supporting beam 102; when the electric push rod 201 pushes the sliding rod 2012 to slide, the sliding rod 2012 can drive the rocker arm 202 at the end to rotate around the rotation center. When the rocker arm 202 rotates, the position of the top block 203 on the rocker arm 202 changes, and the top block 203 drives the top rod 204 to move inside the supporting beam 102, and the top rod 204 can drive the X-axis pressing plate 205 to slide inside, squeezing the workpiece on the supporting beam 102 in the front-to-back direction to ensure that the workpiece is located on the supporting beam. The center position of the beam 102 is moved, and the movement of the push rod 204 can also drive the connecting plate 206 to slide synchronously. The slide plate 2071 on the connecting plate 206 slides along the inclined pressing groove 2073 at this time. The guiding effect of the pressing groove 2073 can push the Y-axis pressing plate 207 at this time to move toward the side wall of the supporting beam 102, and squeeze the workpiece on the supporting beam 102 in the left and right directions. Through the combination of front and back squeezing and left and right squeezing, the workpiece is automatically located at the center position of the supporting beam 102, without manual adjustment, and the operation is simpler.

[0038] The clamping and fixing unit 300 includes a flip plate 301 and a positioning cover 305. The flip plate 301 is installed on the top of the rocker arm 202. A pair of Z-axis pressure plates 302 are slidably installed on the flip plate 301. The positioning cover 305 is installed on the side wall of the rocker arm 202, and a clamping groove 3051 is opened inside the positioning cover 305. The clamping groove 3051 is connected with the strip groove 2021. The width of the clamping groove 3051 and the strip groove 2021 and the diameter of the slide bar 2012 are adapted to each other. After the strip groove 2021 rotates to a vertical state, the clamping groove 3051 and the output end of the electric push rod 201 are both in the same straight line. A plug rod 304 is inserted into the clamping groove 3051, and a return spring 3042 is installed between the plug rod 304 and the positioning cover 305. A swing arm 303 is rotatably installed at the end of the plug rod 304, and the swing arm 303 is rotatably connected to the Z-axis pressure plate 302. When the electric push rod 201 pushes the rocker arm 202 to rotate to a vertical state, the Z-axis pressure plate 302 on the rocker arm 202 rotates to the top of the workpiece, thereby changing the original left and right feeding method to a vertical feeding method, reducing the wear of the workpiece. When the rocker arm 202 rotates to a vertical state, the slide bar 2012 at the end of the electric push rod 201 moves to the horizontal clamping groove 3051. At this time, the rocker arm 202 will not be able to rotate, and the position of the rocker arm 202 can be locked. During the movement of the slide bar 2012, the insertion rod 304 can be squeezed, and the insertion rod 304 begins to move outward, and the Z-axis pressure plate 302 at the end is driven by the swing arm 303 to slide downward along the flip plate 301, and the Z-axis pressure plate 302 can move toward the surface of the workpiece, and the workpiece is clamped and fixed by the Z-axis pressure plate 302 and the supporting beam 102, thereby achieving the purpose of positioning.

[0039] like Figure 1 and Figure 2 As shown, in a specific embodiment, a support platform 1011 is installed at the bottom of the support substrate 101, and the support platform 1011 is installed on the welding table. The support platform 1011 improves stability. A storage groove 1012 is opened on the surface of the support substrate 101, and the storage groove 1012 is used to store workpieces. A support arm 1021 is installed at the bottom of the support beam 102, and a mounting plate 1022 is arranged at the bottom of the support arm 1021, and the mounting plate 1022 is overlapped on the support substrate 101, and a locking bolt is screwed between the mounting plate 1022 and the support substrate 101.

[0040] like Figure 3 , Figure 4 and Figure 6As shown, further, the housing of the electric push rod 201 is installed at the bottom of the supporting beam 102, a U-shaped bracket 2011 is installed at the output end of the electric push rod 201, the U-shaped bracket 2011 is sleeved on the outside of the rocker arm 202, and slide bars 2012 are installed at both ends of the U-shaped bracket 2011, and the rocker arm 202 is in an inclined state. When the electric push rod 201 is started, the U-shaped bracket 2011 at the output end is driven to slide by the electric push rod 201, and the U-shaped bracket 2011 can drive the slide bar 2012 to slide as a whole, and the slide bar 2012 can slide along the strip groove 2021 of the rocker arm 202 at this time.

[0041] Embodiment 2, based on the above embodiment and the difference between this embodiment and the present embodiment is: Figure 4 and Figure 6 As shown, a rotating shaft 2023 is installed at the rotating center of the rocker arm 202, and positioning seats 2022 are rotatably installed at both ends of the rotating shaft 2023. The positioning seats 2022 are welded to the side walls of the supporting beam 102, and a torsion spring is sleeved on the rotating shaft 2023, and the two ends of the torsion spring are respectively clamped on the side walls of the positioning seat 2022 and the rocker arm 202. When the slide bar 2012 slides inside the strip groove 2021, the rocker arm 202 with the strip groove 2021 rotates around the rotating shaft 2023, and the torsion spring on the rotating shaft 2023 is twisted, and the torsion spring is used to facilitate the reset operation later.

[0042] like Figure 6 and Figure 7As shown, in a specific embodiment, a guide groove 2043 is provided inside the support substrate 101, and the top rod 204 is inserted inside the guide groove 2043, a guide wheel 2041 is installed at one end of the top rod 204, and the guide wheel 2041 is slidably connected to the side wall of the top block 203, and a guide plate 2042 is installed at the other end of the top rod 204, and the guide plate 2042 is slidably installed inside the guide groove 2043, and a guide spring 2044 is clamped between the end surface of the guide plate 2042 and the guide groove 2043, and the compression direction of the guide spring 2044 is on the same straight line as the moving direction of the top rod 204. A through groove 2052 is provided on the support substrate 101, and the bottom of the through groove 2052 is connected to the guide groove 2043, and a vertical plate 2051 is slidably provided inside the through groove 2052. When the rocker arm 202 rotates, the top block 203 on the rocker arm 202 rotates, and the rocker arm top block 203 squeezes the top rod 204 to slide toward the supporting beam 102, and the guide wheel 2041 on the top rod 204 rolls on the side wall of the top block 203, which reduces the friction force. When the top rod 204 slides, the top rod 204 slides inside the guide groove 2043, and the guide plate 2042 slides synchronously in the guide groove 2043, and the guide spring 2044 can be squeezed during the sliding process, which facilitates the later reset operation through the guide spring 2044. When the top rod 204 slides, the vertical plate 2051 on the top of the top rod 204 slides inside the through groove 2052, and the X-axis pressure plate 205 on the vertical plate 2051 moves toward the side of the supporting beam 102, squeezing the workpiece on the supporting beam 102 in the front-back direction to ensure that the workpiece is located at the center of the supporting beam 102.

[0043] like Figure 6 , Figure 7 and Figure 8As shown, further, a mounting groove 2072 is provided on the side wall of the supporting beam 102, the mounting groove 2072 is communicated with the guide groove 2043, and a pressing groove 2073 is provided on the inner wall of the mounting groove 2072, a pair of guide protrusions 2074 are slidably installed inside the pressing groove 2073, the guide protrusions 2074 are interconnected with the side wall of the slide plate 2071, the slide plate 2071 is slidably connected with the mounting groove 2072, a slide rail 2061 is installed on the back side of the slide plate 2071, the slide rail 2061 is slidably connected with the connecting plate 206, and the side wall of the connecting plate 206 is slidably connected with the mounting groove 2072. When the push rod 204 slides, the push rod 204 can also slide synchronously with the connecting plate 206. The connecting plate 206 slides inside the installation groove 2072 at this time, and the slide plate 2071 and the guide protrusion 2074 on the connecting plate 206 slide along the inclined pressing groove 2073 at this time. The guiding effect of the pressing groove 2073 can push the slide plate 2071 and the Y-axis pressure plate 207 to move toward the side wall of the supporting beam 102. The slide plate 2071 can slide on the connecting plate 206 through the slide rail 2061 to squeeze the workpiece on the supporting beam 102 in the left and right directions.

[0044] Embodiment 3, based on the above embodiment and the difference between this embodiment and the present embodiment is: Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a pair of limiting grooves 3011 are provided on the flip plate 301, and a limiting slider 3021 is slidably installed inside the pair of limiting grooves 3011, one end of the limiting slider 3021 is connected to the Z-axis pressure plate 302, and a limiting rod 3012 is installed inside the limiting slider 3021, and both ends of the limiting rod 3012 are installed on the inner wall of the limiting groove 3011. A limiting spring 3013 is sleeved on the limiting rod 3012, and one end of the limiting spring 3013 is clamped on the inner wall of the limiting groove 3011, and the other end is clamped on the bottom of the limiting slider 3021. When the limiting slider 3021 slides, the limiting slider 3021 can slide in the limiting groove 3011, and the limiting slider 3021 also slides on the limiting rod 3012, at this time, the limiting spring 3013 can be squeezed, and the limiting spring 3013 is convenient for resetting later.

[0045] like Figure 6 , Figure 7 and Figure 8As shown, in a specific embodiment, a synchronous rod 3022 is installed at the other end of the limit slider 3021, and a first fixed block 3023 is installed at the center of the synchronous rod 3022. The first fixed block 3023 is rotatably connected to the swing arm 303, and a second fixed block 3031 is rotatably installed at the other end of the swing arm 303, and the second fixed block 3031 is mutually connected with the end of the plug rod 304. A synchronous plate 3041 is installed at the end of the plug rod 304 located in the inner cavity of the positioning cover 305, and the size of the synchronous plate 3041 is adapted to the inner diameter of the positioning cover 305. A return spring 3042 is sleeved on the side wall of the plug rod 304, and the two ends of the return spring 3042 are respectively clamped on the side wall of the synchronous plate 3041 and the inner wall of the positioning cover 305. A blocking plate 3043 is installed on the plug rod 304 located outside the positioning cover 305, and the blocking plate 3043 is attached to the side wall of the positioning cover 305. When the insertion rod 304 slides outward, the position of the second fixed block 3031 on the insertion rod 304 changes, and then the first fixed block 3023 is driven to slide through the swing arm 303, and the first fixed block 3023 drives the limiting slider 3021 to slide through the synchronization rod 3022, and the Z-axis pressure plate 302 on the limiting slider 3021 can slide downward, and the Z-axis pressure plate 302 can move toward the surface of the workpiece, and the workpiece is clamped and fixed by the Z-axis pressure plate 302 and the supporting beam 102, thereby achieving the purpose of positioning.

[0046] The implementation principle of an automobile parts welding fixture of this embodiment is as follows:

[0047] When welding is required, the operator first places the workpiece vertically on the supporting beam 102, and then the operator needs to start the electric push rod 201, which drives the U-shaped bracket 2011 at the output end to slide, and the U-shaped bracket 2011 can drive the slide bar 2012 to slide as a whole, and the slide bar 2012 can slide along the strip groove 2021 of the rocker arm 202 at this time.

[0048] When the slide bar 2012 slides inside the strip groove 2021, the rocker arm 202 with the strip groove 2021 rotates around the rotation axis 2023, and the torsion spring on the rotation axis 2023 is twisted, so that the torsion spring is used to facilitate the subsequent reset operation.

[0049] When the rocker arm 202 rotates, the top block 203 on the rocker arm 202 rotates, and the rocker arm top block 203 squeezes the top rod 204 to slide toward the supporting beam 102, and the guide wheel 2041 on the top rod 204 rolls on the side wall of the top block 203, which reduces the friction force. When the top rod 204 slides, the top rod 204 slides inside the guide groove 2043, and the guide plate 2042 slides synchronously in the guide groove 2043, and the guide spring 2044 can be squeezed during the sliding process, which facilitates the later reset operation through the guide spring 2044. When the top rod 204 slides, the vertical plate 2051 on the top of the top rod 204 slides inside the through groove 2052, and the X-axis pressure plate 205 on the vertical plate 2051 moves toward the side of the supporting beam 102, squeezing the workpiece on the supporting beam 102 in the front-back direction to ensure that the workpiece is located at the center of the supporting beam 102.

[0050] When the push rod 204 slides, the push rod 204 can also slide synchronously with the connecting plate 206. The connecting plate 206 slides inside the installation groove 2072 at this time, and the slide plate 2071 and the guide protrusion 2074 on the connecting plate 206 slide along the inclined pressing groove 2073 at this time. The guiding effect of the pressing groove 2073 can push the slide plate 2071 and the Y-axis pressure plate 207 to move toward the side wall of the supporting beam 102. The slide plate 2071 can slide on the connecting plate 206 through the slide rail 2061 to squeeze the workpiece on the supporting beam 102 in the left and right directions.

[0051] By combining the front and rear extrusion and the left and right extrusion, the workpiece is automatically located at the center of the supporting beam 102, and no manual adjustment is required, making the operation simpler.

[0052] When the electric push rod 201 pushes the rocker arm 202 to rotate to a vertical state, the Z-axis pressure plate 302 on the rocker arm 202 rotates to above the workpiece. There is no Z-axis pressure plate 302 on the upper surface of the original supporting beam 102, so the workpiece can be installed vertically, so that the original left and right feeding method is changed to a vertical feeding method, reducing the wear of the workpiece.

[0053] When the rocker arm 202 rotates to a vertical state, the slide bar 2012 at the end of the electric push rod 201 moves to the horizontal clamping groove 3051. At this time, the rocker arm 202 will not be able to rotate, and the rocker arm 202 is locked. Then, the centering adjustment unit 200 is in a stationary state, and the centering adjustment operation is completed. When the slide bar 2012 slides, the slide bar 2012 is inserted into the clamping groove 3051, and the slide bar 2012 can squeeze the synchronization plate 3041 and the insertion rod 304 during the movement. The reset spring 3042 between the synchronization plate 3041 and the positioning cover 305 is compressed, and the reset spring 3042 is used to facilitate the later reset, and the blocking plate 3043 on the insertion rod 304 mainly serves the purpose of positioning.

[0054] When the insertion rod 304 slides outward, the position of the second fixed block 3031 on the insertion rod 304 changes, and then the first fixed block 3023 is driven to slide through the swing arm 303, and the first fixed block 3023 drives the limiting slider 3021 to slide through the synchronization rod 3022, and the Z-axis pressure plate 302 on the limiting slider 3021 can slide downward, and the Z-axis pressure plate 302 can move toward the surface of the workpiece, and the workpiece is clamped and fixed by the Z-axis pressure plate 302 and the supporting beam 102, thereby achieving the purpose of positioning.

[0055] When the limit slider 3021 slides, the limit slider 3021 can slide in the limit groove 3011, and the limit slider 3021 also slides on the limit rod 3012. At this time, the limit spring 3013 can be squeezed to facilitate later resetting through the limit spring 3013.

Claims

1. A welding fixture for automobile parts, comprising a supporting unit (100), a centering adjustment unit (200) and a clamping and fixing unit (300), characterized in that: The support unit (100) comprises a support base plate (101), on which a pair of support beams (102) are vertically mounted; The centering adjustment unit (200) comprises an electric push rod (201), a sliding rod (2012) is installed at the output end of the electric push rod (201), a rocker arm (202) is installed on the side wall of the support crossbeam (102), a strip groove (2021) is opened on the rocker arm (202), and the sliding rod (2012) slides inside the strip groove (2021), a top block (203) is installed on the rocker arm (202), and the top block (203) is fan-shaped, a top rod (204) is movably inserted inside the support crossbeam (102), one end of the top rod (204) is slidably connected to the bottom of the top block (203), a vertical plate (2051) is installed on the side wall of the top rod (204), and an X-shaped top plate (2051) is installed on the top of the vertical plate (2051). The X-axis pressure plate (205) is driven to move toward the center of the supporting beam (102) during the rotational movement of the top block (203) and the rocker arm (202); a connecting plate (206) is installed on the side wall of the top rod (204); a slide plate (2071) is slidably installed on the side wall of the connecting plate (206); and a Y-axis pressure plate (207) is installed at the end of the slide plate (2071); the slide plate (2071) is slidably connected to a pressing groove (2073) provided on the inner wall of the supporting beam (102), and the pressing groove (2073) is in an inclined state; during the horizontal sliding of the top rod (204) and the connecting plate (206), the Y-axis pressure plate (207) is driven to move along the pressing groove (2073) toward the side wall of the supporting beam (102); The clamping and fixing unit (300) comprises a flip plate (301) and a positioning cover (305), wherein the flip plate (301) is mounted on the top of the rocker arm (202), a pair of Z-axis pressure plates (302) are slidably mounted on the flip plate (301), the positioning cover (305) is mounted on the side wall of the rocker arm (202), and a clamping groove (3051) is provided inside the positioning cover (305), the clamping groove (3051) is communicated with the strip groove (2021), and the clamping groove (3051) and the strip groove (2021) are connected to each other. ) and the diameter of the slide bar (2012) are adapted to each other; after the strip groove (2021) is rotated to a vertical state, the clamping groove (3051) and the output end of the electric push rod (201) are both in the same straight line; an insertion rod (304) is inserted into the clamping groove (3051); a return spring (3042) is installed between the insertion rod (304) and the positioning cover (305); a swing arm (303) is rotatably installed at the end of the insertion rod (304), and the swing arm (303) is rotatably connected to the Z-axis pressure plate (302).

2. The automotive parts welding fixture according to claim 1, characterized in that: A support platform (1011) is installed at the bottom of the support base plate (101), and the support platform (1011) is installed on a welding table. A storage groove (1012) is provided on the surface of the support base plate (101). A support arm (1021) is installed at the bottom of the support crossbeam (102). A mounting plate (1022) is provided at the bottom of the support arm (1021), and the mounting plate (1022) is overlapped on the support base plate (101). A locking bolt is screwed between the mounting plate (1022) and the support base plate (101).

3. The automotive parts welding fixture according to claim 1, characterized in that: The housing of the electric push rod (201) is mounted on the bottom of the supporting crossbeam (102); a U-shaped bracket (2011) is mounted on the output end of the electric push rod (201); the U-shaped bracket (2011) is sleeved on the outside of the rocker arm (202); sliding rods (2012) are mounted on both ends of the U-shaped bracket (2011); and the rocker arm (202) is in an inclined state.

4. The automotive parts welding fixture according to claim 1, characterized in that: A rotating shaft (2023) is installed at the rotation center of the rocker arm (202), and positioning seats (2022) are rotatably installed at both ends of the rotating shaft (2023). The positioning seat (2022) is welded to the side wall of the supporting crossbeam (102), and a torsion spring is sleeved on the rotating shaft (2023), and the two ends of the torsion spring are respectively clamped on the side wall of the positioning seat (2022) and the rocker arm (202).

5. The automotive parts welding fixture according to claim 1, characterized in that: A guide groove (2043) is provided inside the support base plate (101), and the push rod (204) is inserted into the guide groove (2043); a guide wheel (2041) is installed at one end of the push rod (204); the guide wheel (2041) is slidably connected to the side wall of the push block (203); a guide plate (2042) is installed at the other end of the push rod (204); the guide plate (2042) is slidably installed inside the guide groove (2043); a guide spring (2044) is clamped between the guide plate (2042) and the end surface of the guide groove (2043); the compression direction of the guide spring (2044) and the moving direction of the push rod (204) are located on the same straight line.

6. The automobile parts welding fixture according to claim 5, characterized in that: The support base plate (101) is provided with a through groove (2052), the bottom of the through groove (2052) is in communication with the guide groove (2043), and a vertical plate (2051) is slidably arranged inside the through groove (2052).

7. The automobile parts welding fixture according to claim 5, characterized in that: The side wall of the supporting crossbeam (102) is provided with a mounting groove (2072), the mounting groove (2072) and the guide groove (2043) are communicated with each other, and the pressing groove (2073) is provided on the inner wall of the mounting groove (2072), a pair of guide protrusions (2074) are slidably installed inside the pressing groove (2073), the guide protrusions (2074) and the side wall of the slide plate (2071) are connected to each other, the slide plate (2071) and the mounting groove (2072) are slidably connected, a slide rail (2061) is installed on the back of the slide plate (2071), the slide rail (2061) and the connecting plate (206) are slidably connected, and the side wall of the connecting plate (206) and the mounting groove (2072) are slidably connected.

8. The automotive parts welding fixture according to claim 1, characterized in that: A pair of limit grooves (3011) are provided on the flip plate (301), and a limit slider (3021) is slidably installed inside the pair of limit grooves (3011). One end of the limit slider (3021) is connected to the Z-axis pressure plate (302). A limit rod (3012) is movably installed inside the limit slider (3021), and both ends of the limit rod (3012) are installed on the inner wall of the limit groove (3011). A limit spring (3013) is sleeved on the limit rod (3012), and one end of the limit spring (3013) is clamped on the inner wall of the limit groove (3011), and the other end is clamped on the bottom of the limit slider (3021).

9. The automobile parts welding fixture according to claim 8, characterized in that: A synchronization rod (3022) is mounted on the other end of the limit slider (3021), a first fixed block (3023) is mounted at the center of the synchronization rod (3022), the first fixed block (3023) is rotatably connected to the swing arm (303), a second fixed block (3031) is rotatably mounted on the other end of the swing arm (303), and the second fixed block (3031) is connected to the end of the insertion rod (304).

10. The automobile parts welding fixture according to claim 1, characterized in that: A synchronous plate (3041) is installed at the end of the insertion rod (304) located in the inner cavity of the positioning cover (305), and the size of the synchronous plate (3041) is adapted to the inner diameter of the positioning cover (305). A return spring (3042) is sleeved on the side wall of the insertion rod (304), and the two ends of the return spring (3042) are respectively clamped on the side wall of the synchronous plate (3041) and the inner wall of the positioning cover (305). A blocking plate (3043) is installed on the insertion rod (304) located outside the positioning cover (305), and the blocking plate (3043) is attached to the side wall of the positioning cover (305).

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