Sheet metal part welding fixture

Abstract

The invention is applicable to the technical field of welding, and provides a sheet metal part welding fixture which comprises a workbench and a translation plate slidably mounted on the workbench, and an electric guide rail a used for driving the translation plate to move is arranged in the workbench; the first positioning mechanism is used for clamping the circular-truncated-cone-shaped sheet metal part and comprises a supporting ring, a vertical frame, a positioning frame and a guide wheel; according to the circular-truncated-cone-shaped sheet metal part clamping device, through cooperative arrangement of the first positioning mechanism, the fixing mechanism and the second positioning mechanism, the problems that most of existing clamps are simple in structure, circular-truncated-cone-shaped sheet metal parts cannot be clamped conveniently, and positioning is not accurate easily are solved; and the production quality of products is seriously influenced.

Description

Technical Field

[0001] The invention relates to the technical field of welding, in particular to a welding fixture for sheet metal parts. Background Art

[0002] Sheet metal parts are products made by comprehensive cold working of thin metal plates (usually less than 6mm), and their notable feature is that the thickness of the same part is consistent. In modern manufacturing, sheet metal parts are widely used in many fields such as automobiles, aviation, and electronics. During the processing of sheet metal parts, it is usually necessary to weld one sheet metal part to another sheet metal part. For example, when welding a truncated cone sheet metal part, in order to meet the processing requirements, it is necessary to weld a circular sheet metal part to one end of the truncated cone sheet metal part.

[0003] Most of the existing fixtures have simple structures, which are not convenient for clamping truncated cone-shaped sheet metal parts, and are prone to inaccurate positioning, which seriously affects the production quality of the product. Therefore, in view of the above situation, it is urgent to provide a sheet metal parts welding fixture to overcome the shortcomings in current practical applications. Summary of the invention

[0004] The purpose of the present invention is to provide a sheet metal parts welding fixture, aiming to solve the problems in the above-mentioned background technology.

[0005] The present invention is implemented in this way: a sheet metal parts welding fixture comprises: A workbench and a translation plate slidably mounted on the workbench, and an electric guide rail a for driving the translation plate to move is arranged in the workbench; A first positioning mechanism for clamping a truncated cone-shaped sheet metal part, the first positioning mechanism comprising a support ring, a stand, a positioning frame and a guide wheel, the support ring is rotatably mounted on a workbench, and a driving assembly for driving the support ring to rotate is provided on the workbench, the stand is fixedly mounted with multiple groups of equal-spaced groups on the support ring, and a rotating shaft is also rotatably mounted on the stand, the positioning frame is fixedly mounted on the rotating shaft, the guide wheel is rotatably mounted on the positioning frame, and two groups of guide wheels are symmetrically arranged on the positioning frame, a locking assembly for limiting the truncated cone-shaped sheet metal part is also provided in the positioning frame, and a reset assembly for supporting the positioning frame is provided on the stand; A fixing mechanism for cooperating with the first positioning mechanism to fix the truncated cone-shaped sheet metal part, wherein the fixing mechanism is arranged on the workbench; And a second positioning mechanism for fixing the workpiece to be connected to the truncated cone-shaped sheet metal part, wherein the second positioning mechanism is arranged on the translation plate.

[0006] As a further solution of the present invention: the locking assembly comprises: A cavity a and a cavity b are provided in the positioning frame, wherein piston plates a and piston plates b are slidably mounted in the cavity a and the cavity b, respectively, and two groups of cavities a are symmetrically arranged in the positioning frame; Spring a and spring b are used for elastically supporting piston plate a and piston plate b respectively, and spring a and spring b are arranged in cavity a and cavity b respectively; A locking block for pressing the guide wheel, wherein the locking block is connected to the piston plate a via a push rod a, and a through hole a for the push rod a to pass through is provided on the positioning frame; A positioning bar used to press the truncated cone-shaped sheet metal part, wherein the positioning bar is connected to the piston plate b via a push rod b, and a through hole b is provided on the positioning frame for the push rod b to pass through; And a pneumatic component for inputting gas into cavity a and cavity b.

[0007] As a further solution of the present invention: the pneumatic component comprises: A shunt pipe, one end of which is communicated with cavity a and cavity b respectively, and the rotating shaft for being installed on the positioning frame has an air guide channel communicated with the other end of the shunt pipe; A vertical plate fixedly mounted on the workbench, wherein an air guide pipe b is arranged on the vertical plate; An air guide component is used for connecting the air guide pipe b and the rotating shaft.

[0008] As a further solution of the present invention: the air guide component comprises: An air guide ring fixedly mounted on the stand, wherein an annular side plate is rotatably mounted on the side of the air guide ring, and a circular hole connected to the air guide pipe b is opened on the annular side plate, and a closed air guide cavity is formed between the annular side plate and the air guide ring; An air guide tube c, one end of which is connected to the air guide cavity, and the other end of which is provided with an air guide block connected to the air guide channel in the rotating shaft, and the air guide block is rotatably connected to the rotating shaft.

[0009] As a further solution of the present invention: the reset component includes: A support rod, wherein the support rod is fixedly mounted on the stand; And an elastic plate for elastically supporting the positioning frame, wherein the elastic plate is fixedly installed on the supporting rod and has an eight-shaped structure.

[0010] As a further solution of the present invention: the driving assembly comprises: An external gear, the external gear being fixedly mounted on the bottom of the support ring; A motor is fixedly mounted on a workbench, and a driving gear meshing with an external gear is fixedly mounted on the output shaft of the motor.

[0011] As a further solution of the present invention: the fixing mechanism comprises: A lifting box is located below the first positioning mechanism, and the lifting box is slidably mounted on the workbench; A threaded rod is rotatably mounted on the bottom of the workbench, an internal threaded hole threadedly connected to the threaded rod is provided in the lifting box, and a driving unit for driving the threaded rod to rotate is also provided at the bottom of the workbench; Rotate a rotating block mounted on the top of the lifting box, wherein a fixed platform is fixedly mounted on the rotating block; And positioning blocks, wherein a plurality of positioning blocks are arranged at equal intervals in the circumferential direction of the fixed platform, and a pneumatic control component for driving the positioning blocks to move is also arranged in the fixed platform.

[0012] As a further solution of the present invention: the gas control component includes: The lifting box is also provided with an air guide cavity connected to the air guide cavity a, and the rotating block is hollow inside, and a vent hole connected to the air guide cavity is opened on the side wall of the rotating block; Compression chambers a and b are arranged in the fixed platform, and the compression chambers a and b are provided with multiple groups, and the multiple groups of compression chambers a and compression chambers b are interconnected. An air guide d for inputting gas into the compression chambers a and compression chambers b is also arranged in the fixed platform, and the air guide d is also connected to the rotating block; A piston plate c is slidably mounted in the compression chamber a, wherein the piston plate c is connected to the positioning block via a push rod c, and a spring c is also provided in the compression chamber a for elastically supporting the piston plate c; A piston plate d is slidably mounted in the compression chamber b, wherein a spring d is provided in the compression chamber b for elastically supporting the piston plate d, and a knocking bar is also provided on the compression chamber b; Bumps a, wherein a plurality of bumps a are arranged at the bottom of the fixing platform, and bumps b for colliding with the bumps a are also arranged on the knocking bar.

[0013] As a further solution of the present invention: the elastic coefficients of the multiple groups of springs d increase successively, and the elastic coefficient of the spring c is smaller than the elastic coefficients of all the springs d.

[0014] As a further solution of the present invention: the second positioning mechanism includes: A lifting plate slidably mounted on the translation plate, wherein the translation plate is provided with an electric guide rail b for driving the lifting plate to move; Rotating a suction pipe installed on the lifting plate, wherein a suction cup is provided at the bottom of the suction pipe; A compression chamber c is arranged in the positioning box, wherein the compression chamber c is arranged in a plurality of groups, and a piston plate e is slidably installed in each group of compression chambers c, and a spring f for elastically supporting the piston plate e is also arranged in the compression chamber c; A moving plate is arranged on the piston plate e, a positioning rod is slidably mounted on the end of the moving plate, and circular plates are arranged at both ends of the positioning rod, and a spring e is also arranged on the moving plate for pulling the circular plate at the top; An air guide pipe e for introducing gas into the compression chamber c, wherein the air guide pipe e is arranged in the positioning box; A locking pin for limiting the positioning rod, the locking pin is slidably installed in the movable plate through the baffle plate b, and a limiting hole for cooperating with the locking pin is opened at the bottom of the positioning rod; The baffle a is connected to the inside of the moving plate through a spring g, and an unlocking block is also provided on the spring g. A button is fixedly installed on the end of the unlocking block, and a baffle rod for cooperating with the unlocking block is also provided on the locking pin.

[0015] Compared with the prior art, the invention has the following beneficial effects: the truncated cone-shaped sheet metal part is placed with its large mouth facing upwards between multiple groups of positioning frames, so that the guide wheel can contact the side wall of the truncated cone-shaped sheet metal part, so that the positioning frame can rotate with the rotating shaft as the axis, and then both groups of guide wheels are in contact with the side of the truncated cone-shaped sheet metal part, so as to achieve the preliminary positioning of the truncated cone-shaped sheet metal part, and then the fixing component is used to enter from the small mouth end of the truncated cone-shaped sheet metal part, and a downward pulling force is generated on the truncated cone-shaped sheet metal part, so as to fix the truncated cone-shaped sheet metal part between the multiple groups of positioning frames, and after the fixing is completed, the truncated cone-shaped sheet metal part is fixed between the multiple groups of positioning frames. The truncated cone-shaped sheet metal part is restricted again with a locking assembly, and then the workpiece (i.e., the circular sheet metal part) to be connected to the truncated cone-shaped sheet metal part is placed under the second positioning mechanism, and the workpiece is fixed with the second positioning mechanism before being moved to the large end of the truncated cone-shaped sheet metal part for easy welding. Through the coordinated arrangement of the first positioning mechanism, the fixing mechanism, and the second positioning mechanism, the problem of the simple structure of most existing fixtures, which is not convenient for clamping truncated cone-shaped sheet metal parts and is prone to inaccurate positioning, is avoided, which seriously affects the production quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 for Figure 1 Schematic diagram of the structure viewed from above.

[0018] Figure 3 It is a structural schematic diagram of the first positioning mechanism in the present invention.

[0019] Figure 4 for Figure 3 Schematic diagram of the front view cross-section structure at point A in the middle.

[0020] Figure 5 It is a schematic cross-sectional structural diagram of the air guide component in the present invention.

[0021] Figure 6 It is a structural schematic diagram of the fixing mechanism in the present invention.

[0022] Figure 7 It is a partial cross-sectional structural schematic diagram of the fixing mechanism in the present invention.

[0023] Figure 8 It is a schematic diagram of the top cross-sectional structure of the fixing platform in the present invention.

[0024] Fig. 9 It is a structural schematic diagram of the second positioning mechanism in the present invention.

[0025] Fig.10 It is a schematic diagram of the top view and cross-section structure of the positioning box in the present invention.

[0026] Fig.11 for Fig.10 Schematic diagram of the enlarged structure at point B in the middle.

[0027] In the attached figure: 1-working table, 2-translation plate, 3-lifting plate, 4-suction tube, 5-positioning box, 6-suction cup, 7-positioning frame, 8-air guide ring, 9-support ring, 10-external gear, 11-fixed table, 12-lifting box, 13-threaded rod, 14-air guide tube a, 15-motor, 16-driving gear, 17-vertical plate, 18-air guide tube b, 19-annular side plate, 20-vertical frame, 21-guide wheel, 22-positioning strip, 23-elastic plate, 24-support rod, 25-air guide tube c, 26-locking block, 27-push rod a, 28-spring a, 29-piston plate a, 30-push rod b, 31-spring b, 32-piston plate b, 3 3-air guide block, 34-diverter pipe, 35-positioning block, 36-rotating block, 37-air guide pipe d, 38-vent, 39-air guide chamber, 40-push rod c, 41-spring c, 42-compression chamber a, 43-compression chamber b, 44-spring d, 45-piston plate d, 46-knocking bar, 47-bump a, 48-bump b, 49-air guide pipe e, 50-piston plate c, 51-compression chamber c, 52-positioning rod, 53-spring e, 54-button, 55-moving plate, 56-spring f, 57-piston plate e, 58-locking pin, 59-blocking rod, 60-unlocking block, 61-spring g, 62-baffle a, 63-baffle b. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The specific implementation of the present invention is described in detail below in combination with specific embodiments.

[0029] See also Figure 1-Figure 11 , an embodiment of the present invention provides a sheet metal parts welding fixture, the sheet metal parts welding fixture comprising: A workbench 1 and a translation plate 2 slidably mounted on the workbench 1, and an electric guide rail a for driving the translation plate 2 to move is provided in the workbench 1; A first positioning mechanism for clamping a truncated cone-shaped sheet metal part, the first positioning mechanism comprising a support ring 9, a stand 20, a positioning frame 7 and a guide wheel 21, the support ring 9 is rotatably mounted on the workbench 1, and a driving assembly for driving the support ring 9 to rotate is provided on the workbench 1, a plurality of sets of the stand 20 are fixedly mounted on the support ring 9 at equal intervals, and a rotating shaft is also rotatably mounted on the stand 20, the positioning frame 7 is fixedly mounted on the rotating shaft, the guide wheel 21 is rotatably mounted on the positioning frame 7, and two sets of the guide wheel 21 are symmetrically arranged on the positioning frame 7, a locking assembly for limiting the truncated cone-shaped sheet metal part is also provided in the positioning frame 7, and a reset assembly for supporting the positioning frame 7 is provided on the stand 20; A fixing mechanism for cooperating with the first positioning mechanism to fix the truncated cone-shaped sheet metal part, wherein the fixing mechanism is arranged on the workbench 1; And a second positioning mechanism for fixing the workpiece to be connected to the truncated cone-shaped sheet metal part, wherein the second positioning mechanism is arranged on the translation plate 2.

[0030] In the embodiment of the present invention, the clamp is preferentially suitable for the welding process of the large-mouth end of the truncated cone-shaped part; when in use, the large-mouth of the truncated cone-shaped sheet metal part is placed upward between multiple groups of positioning frames 7, so that the guide wheel 21 can contact the side wall of the truncated cone-shaped sheet metal part, so that the positioning frame 7 can rotate with the rotating shaft as the axis, and then the two groups of guide wheels 21 are in contact with the side of the truncated cone-shaped sheet metal part, so as to achieve the preliminary positioning of the truncated cone-shaped sheet metal part, and then the fixing component is used to enter from the small-mouth end of the truncated cone-shaped sheet metal part, and a downward pulling force is generated on the truncated cone-shaped sheet metal part, so as to fix the truncated cone-shaped sheet metal part to the multiple groups of positioning frames 7. After the fixation is completed, the locking assembly is used to restrict the truncated cone sheet metal part again, and then the workpiece to be connected with the truncated cone sheet metal part (i.e., the circular sheet metal part) is placed under the second positioning mechanism, and the workpiece is fixed by the second positioning mechanism and then moved to the large end of the truncated cone sheet metal part for welding. Compared with the prior art, the present invention avoids the problem that most of the existing clamps have a simple structure, are not convenient for clamping the truncated cone sheet metal parts, are prone to inaccurate positioning, and seriously affect the production quality of the product through the coordinated arrangement of the first positioning mechanism, the fixing mechanism and the second positioning mechanism.

[0031] In one embodiment of the present invention, see Figure 1-Figure 11 , the locking assembly comprises: A cavity a and a cavity b are provided in the positioning frame 7, wherein a piston plate a29 and a piston plate b32 are slidably mounted in the cavity a and the cavity b, respectively, and two groups of cavities a are symmetrically arranged in the positioning frame 7; A spring a28 and a spring b31 for elastically supporting the piston plate a29 and the piston plate b32, respectively, wherein the spring a28 and the spring b31 are respectively arranged in the cavity a and the cavity b; A locking block 26 for pressing the guide wheel 21, wherein the locking block 26 is connected to the piston plate a29 via a push rod a27, and a through hole a for the push rod a27 to pass through is provided on the positioning frame 7; A positioning bar 22 for pressing the truncated cone-shaped sheet metal part, wherein the positioning bar 22 is connected to the piston plate b32 via a push rod b30, and a through hole b for the push rod b30 to pass through is provided on the positioning frame 7; and a pneumatic component for inputting gas into cavity a and cavity b; The pneumatic assembly comprises: A shunt pipe 34, one end of which is communicated with the cavity a and the cavity b respectively, and the rotating shaft for being installed on the positioning frame 7 has an air guide channel communicated with the other end of the shunt pipe 34; A vertical plate 17 fixedly mounted on the workbench 1, wherein an air guide pipe b18 is provided on the vertical plate 17; An air guide component, which is used to connect the air guide pipe b18 and the rotating shaft; The air guide component comprises: An air guide ring 8 is fixedly mounted on the stand 20, and a circular side plate 19 is rotatably mounted on the side of the air guide ring 8. A circular hole connected to the air guide pipe b18 is opened on the circular side plate 19, and a closed air guide cavity 39 is formed between the circular side plate 19 and the air guide ring 8; An air guide tube c25, one end of which is connected to the air guide cavity 39, and the other end of which is provided with an air guide block 33 connected to the air guide channel in the rotating shaft, and the air guide block 33 is rotatably connected to the rotating shaft; wherein both the air guide tube c25 and the air guide tube b18 are made of hard tubes; The reset component comprises: A support rod 24, wherein the support rod 24 is fixedly mounted on the stand 20; and an elastic plate 23 for elastically supporting the positioning frame 7, wherein the elastic plate 23 is fixedly mounted on the support rod 24, and the elastic plate 23 is an eight-shaped structure; The drive assembly comprises: An external gear 10, wherein the external gear 10 is fixedly mounted on the bottom of the support ring 9; A motor 15 is fixedly mounted on the workbench 1 , and a driving gear 16 meshing with the external gear 10 is fixedly mounted on the output shaft of the motor 15 .

[0032] In this embodiment, when in use, the air guide pipe b18 is connected to an external air source, and the gas will pass through the air guide pipe b18 into the annular side plate 19 and the air guide ring 8 to form a closed air guide cavity 39, and pass through the air guide pipe c25, the elastic plate 23 and the shunt pipe 34 into the cavity a and the cavity b, thereby pushing the piston plate a29 and the piston plate b32 to move, and the push rod a27 can drive the locking block 26 to press on the guide wheel 21 to fix the guide wheel 21, and the push rod b30 can drive the positioning bar 22 to press It is pressed onto the side wall of the truncated cone-shaped sheet metal part to achieve further fixation. During welding, the supporting ring 9 can be driven to rotate by the coordinated arrangement of the motor 15, the driving gear 16 and the external gear 10, thereby driving the truncated cone-shaped sheet metal part to rotate. The rotational connection between the annular side plate 19 and the air guide ring 8 facilitates the delivery of gas during rotation. The elastic plate 23 facilitates the maintenance of the positioning frame 7 in a vertical state for easy use. After the gas is extracted, the locking block 26 and the positioning strip 22 can be reset by using the spring a28 and the spring b31.

[0033] In one embodiment of the present invention, see Figure 1-Figure 11 , the fixing mechanism comprises: A lifting box 12 is located below the first positioning mechanism, and the lifting box 12 is slidably mounted on the workbench 1; The threaded rod 13 is rotatably mounted on the bottom of the workbench 1, and an internal threaded hole threadedly connected to the threaded rod 13 is provided in the lifting box 12, and a driving unit (not shown in the figure) for driving the threaded rod 13 to rotate is also provided at the bottom of the workbench 1; wherein the driving unit may be a driving motor; Rotate a rotating block 36 mounted on the top of the lifting box 12, on which a fixed platform 11 is fixedly mounted; and positioning blocks 35, wherein a plurality of positioning blocks 35 are arranged at equal intervals in the circumferential direction of the fixed platform 11, and a pneumatic control component for driving the positioning blocks 35 to move is also arranged in the fixed platform 11; The gas control component comprises: The air guide pipe a14, the lifting box 12 is also provided with an air guide cavity 39 connected with the air guide pipe a14, and the rotating block 36 is hollow inside, and a vent hole 38 connected with the air guide cavity 39 is opened on the side wall of the rotating block 36; Compression chambers a42 and b43 are provided in the fixed platform 11, and the compression chambers a42 and b43 are provided with multiple groups, and the multiple groups of compression chambers a42 and b43 are interconnected. An air guide d37 for inputting gas into the compression chambers a42 and b43 is also provided in the fixed platform 11, and the air guide d37 is also connected to the rotating block 36; A piston plate c50 slidably mounted in the compression chamber a42, wherein the piston plate c50 is connected to the positioning block 35 via a push rod c40, and a spring c41 for elastically supporting the piston plate c50 is also provided in the compression chamber a42; A piston plate d45 is slidably mounted in the compression chamber b43, wherein a spring d44 is provided in the compression chamber b43 for elastically supporting the piston plate d45, and a knocking bar 46 is also provided on the compression chamber b43; The protrusions a47 are provided in multiple groups at the bottom of the fixing platform 11, and the knocking bar 46 is also provided with a protrusion b48 for colliding with the protrusions a47; wherein the knocking bar 46 is made of elastic material; The elastic coefficients of the multiple groups of springs d44 increase sequentially, and the elastic coefficient of the spring c41 is smaller than the elastic coefficients of all the springs d44.

[0034] In this embodiment, the positioning blocks 35 are preferably three groups; when in use, the air guide pipe a14 is connected to the external air source, and the rotating threaded rod 13 can drive the lifting box 12 to move, so that the fixed platform 11 is pushed from the small end into the truncated cone-shaped sheet metal part, and then the air guide pipe a14 is used to introduce the gas into the air guide cavity 39, and the gas in the air guide cavity 39 enters the rotating block 36 through the vent hole 38, and enters the compression chamber a42 and the compression chamber b43 through the air guide pipe d37. Since the elastic coefficients of the multiple groups of springs d44 increase in sequence, and the elastic coefficient of the spring c41 is less than the elastic coefficient of all the springs d44, the piston plate c50 will move first, and the piston plate c50 and The push rod c40 can push the positioning block 35 to contact the inner wall of the truncated cone-shaped sheet metal part. After the contact, the lifting box 12 is used to drive the rotating block 36 and the fixed table 11 to move downward. At the same time, the gas will push the piston plate d45 to move in sequence. The piston plate d45 drives the knocking bar 46 to move, so that the bump a47 and the bump b48 collide to generate vibration. During the vibration, the truncated cone-shaped sheet metal part is pulled down, so that the outer wall of the truncated cone-shaped sheet metal part is in full contact with the guide wheel 21, and the inner wall of the truncated cone-shaped sheet metal part is in full contact with the positioning block 35, thereby improving the fixing accuracy. The truncated cone-shaped sheet metal part can be fixed by continuously inputting gas and driving the fixed table 11 to move continuously downward.

[0035] In one embodiment of the present invention, see Figure 1-Figure 11 , the second positioning mechanism comprises: A lifting plate 3 is slidably mounted on the translation plate 2, wherein the translation plate 2 is provided with an electric guide rail b for driving the lifting plate 3 to move; the height of the lifting plate 3 can be adjusted by the electric guide rail b; The suction pipe 4 mounted on the lifting plate 3 is rotatably mounted, and a suction cup 6 is provided at the bottom of the suction pipe 4; A compression chamber c51 is arranged in the positioning box 5, wherein the compression chamber c51 is provided with multiple groups, and a piston plate e57 is slidably installed in each group of compression chambers c51, and a spring f56 for elastically supporting the piston plate e57 is also arranged in the compression chamber c51; A moving plate 55 is arranged on the piston plate e57, and a positioning rod 52 is slidably mounted on the end of the moving plate 55, and circular plates are arranged at both ends of the positioning rod 52. The moving plate 55 is also provided with a spring e53 for pulling the circular plate at the top; An air guide pipe e49 for introducing gas into the compression chamber c51, wherein the air guide pipe e49 is disposed in the positioning box 5; A locking pin 58 for limiting the position of the positioning rod 52, wherein the locking pin 58 is slidably installed in the movable plate 55 through the baffle b63, and a limiting hole for cooperating with the locking pin 58 is provided at the bottom of the positioning rod 52; The baffle a62 is connected to the inside of the movable plate 55 via a spring g61, and an unlocking block 60 is also provided on the spring g61. A button 54 is fixedly installed on the end of the unlocking block 60, and a baffle rod 59 for cooperating with the unlocking block 60 is also provided on the locking pin 58.

[0036] In this embodiment, the compression chamber c51 is preferably three groups; when in use, the air guide tube e49 is connected to the external air source, the suction tube 4 is connected to the external negative pressure pump, and then the button 54 is pressed, so that the unlocking block 60 pushes the blocking rod 59 to drive the locking pin 58 to move toward the positioning box 5, so that the spring e53 can pull the positioning rod 52 to move downward, and after the gas enters the compression chamber c51, it will push the piston plate e57, the moving plate 55 and the compression chamber a42 to move outward, and then the workpiece is placed under the suction cup 6, and then the gas in the compression chamber c51 is extracted, and the spring f56 will push the piston plate e57 to move, so that the positioning The positioning rod 52 is pressed to the side of the workpiece to position the workpiece, which makes it easier for the suction cup 6 to adsorb the center of the workpiece. The translation plate 2 translates on the workbench 1, and the lifting plate 3 moves vertically downward on the translation plate 2, so that the workpiece is moved to the large end. At this time, gas is re-injected into the compression chamber c51 to expand the movable plate 55 and push the positioning rod 52 upward, so that the locking pin 58 re-fixes the positioning rod 52 to prevent the movable plate 55 and the positioning rod 52 from affecting the placement of the workpiece into the large end. After the workpiece is pressed into the large end by the suction cup 6, the workpiece can rotate with the truncated cone-shaped sheet metal part to facilitate welding.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sheet metal parts welding fixture, comprising a workbench and a translation plate slidably mounted on the workbench, and an electric guide rail a is provided in the workbench for driving the translation plate to move, characterized in that: Also includes: A first positioning mechanism for clamping a truncated cone-shaped sheet metal part, the first positioning mechanism comprising a support ring, a stand, a positioning frame and a guide wheel, the support ring is rotatably mounted on a workbench, and a driving assembly for driving the support ring to rotate is provided on the workbench, the stand is fixedly mounted with multiple groups of equal-spaced groups on the support ring, and a rotating shaft is also rotatably mounted on the stand, the positioning frame is fixedly mounted on the rotating shaft, the guide wheel is rotatably mounted on the positioning frame, and two groups of guide wheels are symmetrically arranged on the positioning frame, a locking assembly for limiting the truncated cone-shaped sheet metal part is also provided in the positioning frame, and a reset assembly for supporting the positioning frame is provided on the stand; A fixing mechanism for cooperating with the first positioning mechanism to fix the truncated cone-shaped sheet metal part, wherein the fixing mechanism is arranged on the workbench; And a second positioning mechanism for fixing the workpiece to be connected to the truncated cone-shaped sheet metal part, wherein the second positioning mechanism is arranged on the translation plate.

2. The sheet metal parts welding fixture according to claim 1, characterized in that: The locking assembly comprises: Cavity a and cavity b are provided in the positioning frame, piston plates a and piston plates b are slidably mounted in the cavity a and cavity b respectively, and two groups of cavity a are symmetrically arranged in the positioning frame; Spring a and spring b are used for elastically supporting piston plate a and piston plate b respectively, and spring a and spring b are arranged in cavity a and cavity b respectively; A locking block for pressing the guide wheel, wherein the locking block is connected to the piston plate a via a push rod a, and a through hole a for the push rod a to pass through is provided on the positioning frame; A positioning bar used to press the truncated cone-shaped sheet metal part, wherein the positioning bar is connected to the piston plate b via a push rod b, and a through hole b is provided on the positioning frame for the push rod b to pass through; And a pneumatic component for inputting gas into cavity a and cavity b.

3. The sheet metal parts welding fixture according to claim 2, characterized in that: The pneumatic assembly comprises: A shunt pipe, one end of which is communicated with cavity a and cavity b respectively, and the rotating shaft for being installed on the positioning frame has an air guide channel communicated with the other end of the shunt pipe; A vertical plate fixedly mounted on the workbench, wherein an air guide pipe b is arranged on the vertical plate; An air guide component is used for connecting the air guide pipe b and the rotating shaft.

4. The sheet metal parts welding fixture according to claim 3, characterized in that: The air guide component comprises: An air guide ring fixedly mounted on the stand, wherein an annular side plate is rotatably mounted on the side of the air guide ring, and a circular hole connected to the air guide pipe b is opened on the annular side plate, and a closed air guide cavity is formed between the annular side plate and the air guide ring; An air guide tube c, one end of which is connected to the air guide cavity, and the other end of which is provided with an air guide block connected to the air guide channel in the rotating shaft, and the air guide block is rotatably connected to the rotating shaft.

5. The sheet metal parts welding fixture according to claim 1, characterized in that: The reset component comprises: A support rod, wherein the support rod is fixedly mounted on the stand; And an elastic plate for elastically supporting the positioning frame, wherein the elastic plate is fixedly installed on the supporting rod and has an eight-shaped structure.

6. The sheet metal parts welding fixture according to claim 1, characterized in that: The drive assembly comprises: An external gear, the external gear being fixedly mounted on the bottom of the support ring; A motor is fixedly mounted on a workbench, and a driving gear meshing with an external gear is fixedly mounted on the output shaft of the motor.

7. The sheet metal parts welding fixture according to claim 1, characterized in that: The fixing mechanism comprises: A lifting box is located below the first positioning mechanism, and the lifting box is slidably mounted on the workbench; A threaded rod is rotatably mounted on the bottom of the workbench, an internal threaded hole threadedly connected to the threaded rod is provided in the lifting box, and a driving unit for driving the threaded rod to rotate is also provided at the bottom of the workbench; Rotate a rotating block mounted on the top of the lifting box, wherein a fixed platform is fixedly mounted on the rotating block; And positioning blocks, wherein a plurality of positioning blocks are arranged at equal intervals in the circumferential direction of the fixed platform, and a pneumatic control component for driving the positioning blocks to move is also arranged in the fixed platform.

8. The sheet metal parts welding fixture according to claim 7, characterized in that: The gas control component comprises: The lifting box is also provided with an air guide cavity connected to the air guide cavity a, and the rotating block is hollow inside, and a vent hole connected to the air guide cavity is opened on the side wall of the rotating block; Compression chambers a and b are arranged in the fixed platform, and the compression chambers a and b are provided with multiple groups, and the multiple groups of compression chambers a and compression chambers b are interconnected. An air guide d for inputting gas into the compression chambers a and compression chambers b is also arranged in the fixed platform, and the air guide d is also connected to the rotating block; A piston plate c is slidably mounted in the compression chamber a, wherein the piston plate c is connected to the positioning block via a push rod c, and a spring c is also provided in the compression chamber a for elastically supporting the piston plate c; A piston plate d is slidably mounted in the compression chamber b, wherein a spring d is provided in the compression chamber b for elastically supporting the piston plate d, and a knocking bar is also provided on the compression chamber b; Bumps a, wherein a plurality of bumps a are arranged at the bottom of the fixing platform, and bumps b for colliding with the bumps a are also arranged on the knocking bar.

9. The sheet metal parts welding fixture according to claim 8, characterized in that: The elastic coefficients of the multiple groups of springs d increase in sequence, and the elastic coefficient of the spring c is smaller than the elastic coefficients of all the springs d.

10. The sheet metal parts welding fixture according to claim 1, characterized in that: The second positioning mechanism comprises: A lifting plate slidably mounted on the translation plate, wherein the translation plate is provided with an electric guide rail b for driving the lifting plate to move; Rotating a suction pipe installed on the lifting plate, wherein a suction cup is provided at the bottom of the suction pipe; A compression chamber c is arranged in the positioning box, wherein the compression chamber c is arranged in a plurality of groups, and a piston plate e is slidably installed in each group of compression chambers c, and a spring f for elastically supporting the piston plate e is also arranged in the compression chamber c; A moving plate is arranged on the piston plate e, a positioning rod is slidably mounted on the end of the moving plate, and circular plates are arranged at both ends of the positioning rod, and a spring e is also arranged on the moving plate for pulling the circular plate at the top; An air guide pipe e for introducing gas into the compression chamber c, wherein the air guide pipe e is arranged in the positioning box; A locking pin for limiting the positioning rod, the locking pin is slidably installed in the movable plate through the baffle plate b, and a limiting hole for cooperating with the locking pin is opened at the bottom of the positioning rod; The baffle a is connected to the inside of the moving plate through a spring g, and an unlocking block is also provided on the spring g. A button is fixedly installed on the end of the unlocking block, and a baffle rod for cooperating with the unlocking block is also provided on the locking pin.

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