Double-rotating-disc type spot welding device for V-shaped clamp of commercial vehicle

Abstract

In order to solve the problems that in the prior art, a commercial vehicle V-shaped clamp spot welding method is complex in operation, low in production efficiency, difficult to guarantee welding quality and the like, the invention provides a double-rotating-disc type commercial vehicle V-shaped clamp spot welding device which comprises a supporting foot I, a rotating disc I, a rotating disc II, a clamping mechanism and a spot welding mechanism. The turntable I is mounted at the top of the supporting leg I; more than two turntables II are circumferentially and uniformly distributed and fixedly mounted on the disc body I; the clamping mechanism is fixed to the disc body II and comprises a vertical plate, a transverse plate, a supporting plate, a base plate, an arc positioning base, a bidirectional air cylinder, a push plate and a positioning column. And the spot welding mechanism is fixed on the platform beside the turntable I, and comprises a transverse moving assembly, a longitudinal moving assembly and a welding assembly. The double-rotating-disc type spot welding device for the V-shaped clamp of the commercial vehicle has the beneficial technical effects that automatic operation is basically achieved, time and labor are saved, the efficiency is improved, and the welding quality is guaranteed.

Description

Technical Field

[0001] The invention relates to a manufacturing technology of a V-shaped clamp for a commercial vehicle, and in particular to a double-turntable spot welding device for a V-shaped clamp for a commercial vehicle. Background Art

[0002] The commercial vehicle V-type clamp is mainly used to fix the three-way catalytic converter box of trucks or commercial vehicles. Since the cylinder of the three-way catalytic converter box is provided with an annular reinforcement rib protruding outward, and the cross-sectional shape of the annular reinforcement rib is an inverted V-shape. Therefore, when the clamp is used to fix it, the clamp is preferably set at the annular reinforcement rib of the cylinder. Since the cross-sectional shape of the annular reinforcement rib is an inverted V-shape, the shape of the inner side of the circumference of the clamp is preferably also V-shaped. For this reason, the clamp for fixing the three-way catalytic converter box of the truck or commercial vehicle is designed as a combined structure, one part of which is a thin rectangular flat plate with bending heads at both ends and curled into a ring-shaped annular cassette, and the other part is an arc-shaped cassette with a V-shaped cross-sectional shape. The arc-shaped cassette is welded to the inner side of the circumference of the annular cassette using spot welding technology, thereby forming a V-shaped clamp with a V-shaped inner side of the circumference. Usually, this type of clamp with a V-shaped inner side of the circumference is called a V-type clamp (see attached Figure 1 , in the figure, a is a flat cassette and b is an arc cassette).

[0003] As mentioned above, the V-shaped clamp includes an annular cassette and an arc-shaped cassette. The arc-shaped cassette is welded to the inner side of the circumference of the annular cassette to form a V-shaped clamp. In fact, the arc-shaped cassette is formed by dividing a whole circle into three sections from the radial direction, that is, forming three arc-shaped cassettes. Then, a spot welder is used to weld the three arc-shaped cassettes to the inner side of the circumference of the annular cassette, and each arc-shaped cassette is welded at least two points. The prior art commercial vehicle V-shaped clamp spot welding method directly places the first welding point of the arc-shaped cassette on the lower contact surface of the electric welder, and then the annular cassette is sleeved on the outer side of the arc-shaped cassette, and the spot welder is started to complete the welding of the first welding point; the arc-shaped cassette and the annular cassette are rotated at a set angle at the same time, so that the lower contact surface of the spot welder coincides with the second welding point, and the spot welder is started again to complete the welding of the second welding point. Thus, the welding of the first arc-shaped cassette is completed. Repeat the above operation twice to complete the welding of the second and third arc-shaped cassettes. At this point, the welding of a commercial vehicle V-shaped clamp is completed.

[0004] Obviously, the existing commercial vehicle V-clamp spot welding method has the problems of complicated operation, low production efficiency and difficulty in ensuring welding quality. Summary of the invention

[0005] In order to solve the problems of complicated operation, low production efficiency and difficulty in ensuring welding quality in the prior art spot welding method for commercial vehicles, the present invention proposes a double-turntable commercial vehicle V-clamp spot welding device.

[0006] The double-turntable commercial vehicle V-clamp spot welding device of the present invention comprises a support leg I, a turntable I, a turntable II, a clamping mechanism and a spot welding mechanism; the support leg I is a single-column structure, which is arranged at the center bottom of the turntable I; the turntable I is installed on the top of the support leg I, and comprises a gear box, a rotating shaft I, an air motor I and a disk body I; the gear box is installed on the top of the support leg, and comprises a driving gear and a driven gear that mesh with each other; the rotating shaft I is installed in the center hole of the driven gear and extends upward to expose the gear box body; the air motor I is fixed to the side of the support leg I, and the output shaft is connected to the driving gear shaft of the gear box; the disk body I is fixedly installed on the upper surface of the rotating shaft I, and a through hole is provided at the position of the disk body I corresponding to the installation of the turntable II; the turntable II is two The above is evenly distributed and fixed on the disk body I, including a U-shaped seat I, a U-shaped seat II, an air motor II, a rotating shaft II, a support disk, a support plate I and a disk body II; the opening width of the U-shaped seat I is larger than the through hole diameter of the disk body I, and is fixed to the bottom surface of the through hole of the disk body I; the opening width of the U-shaped seat II is smaller than the U-shaped seat I, and is fixed to the back of the U-shaped seat I; the air motor II is fixed to the back of the U-shaped seat II; the lower end of the rotating shaft II is connected to the output shaft of the air motor II, and the upper end is connected to the center of the support disk; the support plate I is two rectangular plates, which are vertically fixed on the upper surface of the support disk at intervals; the disk body II is fixed on the upper surface of the support plate I; the clamping mechanism is fixed on the disk body II, including a vertical plate, a horizontal plate, a support plate, a base plate, an arc positioning seat, a double To the cylinder, push plate and positioning column; the vertical plate and the horizontal plate are two pieces, and one end of the vertical plate and one end of the horizontal plate are vertically fixedly connected to each other to form an L-shaped support structure; the other end of the vertical plate is vertically fixed to the bottom surface of the disk body II, and the other end of the horizontal plate is vertically connected to the bottom of the support plate; thus, the vertical plate, the horizontal plate and the support plate form a support structure with a U-shaped cross section, and are fixedly connected to the bottom surface of the disk body II; the base plate is fixed to the surface of the disk body II, and three arc positioning seats are evenly distributed on the circumference of the base plate surface; the shape and size of the outer side surface of the arc positioning seat match the inner side of the arc cassette, and a positioning boss is provided in the middle of the arc positioning seat; the width of the positioning boss is the same as the set interval between the arc cassettes; The two-way cylinder is fixed on the inner side of the support plate; the push plates are rectangular and there are two of them, and the inner side surfaces of one end of the two push plates are respectively fixed on the two piston ends of the two-way cylinder; there are two positioning columns, which are respectively fixed on the inner side surfaces of the other ends of the two push plates; the spot welding mechanism is fixed on the platform beside the turntable I, including a transverse movement component, a longitudinal movement component and a welding component; the transverse movement component is fixed on the platform beside the turntable I, including support legs II, a transverse support plate, a slide rail I, a slide seat I, a screw rod I, a nut I, a motor I and a longitudinal support plate; there are two support legs II, which are fixed on the platform beside the turntable I at intervals; the transverse support plate is a long strip, which is horizontally fixed on the upper ends of the two support legs; there are two slide rails I, which are horizontally fixed on the upper and lower sides of the transverse support plate;There are at least four slide seats Ⅰ, which are respectively installed on the slide rails Ⅰ in groups of two; the screw rod Ⅰ is installed in the horizontal middle part of the horizontal support plate through the bearing seats at both ends, and the left end is connected to the rotating shaft of the motor Ⅰ fixed on the left side of the horizontal support plate; the longitudinal support plate is rectangular, vertically fixed on the surface of the slide seat Ⅰ, and the nut Ⅰ fixed on the back side is screwed on the screw rod Ⅰ; the longitudinal movement assembly is installed on the longitudinal support plate, including slide rails Ⅱ, slide seat Ⅱ, slide plate, cylinder seat Ⅰ and cylinder Ⅰ; there are two slide rails Ⅱ, which are vertically fixed on both sides of the longitudinal support plate; there are at least four slide seats Ⅱ, which are respectively installed on the slide rails Ⅱ in groups of two; the slide plate is fixed on the surface of the slide seat Ⅱ; the cylinder seat Ⅰ is a rectangular plate, vertically fixed on the longitudinal support plate above the slide rail Ⅱ; the cylinder Ⅰ is fixedly installed on the cylinder seat Ⅰ, and the piston end is connected to the upper end of the slide plate; the welding assembly is fixed on the slide plate of the longitudinal movement assembly, It includes support plate II, top plate, right side plate, fixed electrode, slide rail III, slide seat III, movable electrode, left side plate, cylinder II and rear side plate; the support plate II is a rectangular plate and is vertically fixed on the surface of the slide plate, and a reinforcing rib is arranged between the support plate II and the slide plate; the top plate is fixed on the lower surface of the support plate II; the right side plate is vertically fixed on the right end of the lower surface of the top plate; the pole head of the fixed electrode is fixed to the left inside of the right side plate; the slide rail III is fixed to the middle of the lower surface of the top plate; the slide seat III is installed on the slide rail III; the pole head of the movable electrode is fixed to the right on the back of the slide seat III, and the pole head of the movable electrode is coaxial with the pole head of the fixed electrode; the left side plate is vertically fixed on the left side of the lower surface of the top plate; the cylinder II is fixed on the outer side of the left side plate, and the piston of the cylinder II is connected to the rear side of the movable electrode; the rear side plate is fixed on the rear side of the top plate, and its two ends form a triangular support with the left side plate and the right side plate respectively. ;

[0007] Furthermore, a buffer assembly is also arranged between the longitudinal movement assembly and the welding assembly; the buffer assembly includes an upper connecting plate, a side plate, a buffer body, a core shaft, a buffer spring and a lower connecting plate; the upper connecting plate is a rectangular plate, fixed on the lower surface of the support plate II of the longitudinal movement assembly; the side plates are rectangular plates and are in two pieces, respectively fixed vertically on the left and right ends of the upper connecting plate; the buffer body is a rectangular structure, and two axial holes are arranged at intervals in the middle of the cross section of the rectangular buffer body; there are two core shafts, which are fixed at intervals between the left and right side plates, and the buffer body is slidably mounted in the middle; there are four buffer springs, which are respectively mounted on the core shaft between the buffer body and the side plates in a group of two; the lower connecting plate is fixed on the lower surface of the buffer body, and is fixedly connected to the top plate of the welding assembly.

[0008] Furthermore, the support leg II of the transverse displacement assembly is a plate-frame-column structure, including an upper sealing plate, a lower sealing plate, a left supporting plate, a right supporting plate, a middle supporting plate, an upper reinforcing rib and a lower reinforcing rib; the upper sealing plate and the lower sealing plate are both rectangular plates of the same size, the left supporting plate and the right supporting plate are both long strips of the same shape and size, and the middle supporting plate is a long strip of the same length as the left supporting plate or the right supporting plate; the left supporting plate and the right supporting plate are respectively fixed on both sides of the middle supporting plate, thereby forming a column with an I-shaped cross-section; the upper sealing plate and the lower sealing plate are respectively fixed on the top and bottom ends of the I-shaped column, thereby forming a plate-frame-column structure that supports each other; an upper reinforcing rib in the shape of a triangle is provided between the bottom surface of the upper sealing plate and the outer side surface of the left supporting plate or the right supporting plate; a lower reinforcing rib in the shape of a long triangle is provided between the inner side surface of the middle supporting plate and the upper surface of the lower sealing plate.

[0009] Furthermore, a triangular reinforcing rib is provided between the cylinder seat I and the longitudinal support plate.

[0010] The beneficial technical effect of the double-turntable commercial vehicle V-shaped clamp spot welding device of the present invention is that it basically realizes automated operation, which saves time and labor, improves efficiency and ensures welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Attached Figure 1 It is a three-dimensional schematic diagram of a commercial vehicle V-type clamp before and after welding; Attached Figure 2 It is a three-dimensional schematic diagram of a double-turntable commercial vehicle V-shaped clamp spot welding device of the present invention; Attached Figure 3 is a three-dimensional schematic diagram of the turntable I of the present invention; Attached Figure 4 is a three-dimensional schematic diagram of the turntable I of the present invention from another angle; Attached Figure 5 It is a three-dimensional schematic diagram of the driving and driven gears in the turntable I gearbox of the present invention; Attached Figure 6 is a three-dimensional schematic diagram of the turntable II of the present invention; Attached Figure 7 is a three-dimensional schematic diagram of the turntable II of the present invention from another angle; Attached Figure 8 is a three-dimensional schematic diagram of the clamping mechanism of the present invention; Attached Fig. 9 is a three-dimensional schematic diagram of the clamping mechanism of the present invention from another angle; Attached Fig.10 It is a three-dimensional schematic diagram of the clamping mechanism of the present invention clamping an arc-shaped cassette; Attached Fig.11 It is a three-dimensional schematic diagram of the clamping mechanism of the present invention clamping an arc-shaped cassette and an annular cassette; Attached Fig.12 is a three-dimensional schematic diagram of the spot welding mechanism of the present invention; Attached Fig.13 It is a three-dimensional schematic diagram of the transverse movement assembly of the spot welding mechanism of the present invention; Attached Fig.14 It is a three-dimensional schematic diagram of the longitudinal movement assembly of the spot welding mechanism of the present invention; Attached Fig.15 It is a three-dimensional schematic diagram of a welding assembly of the spot welding mechanism of the present invention; Attached Fig.16 It is a three-dimensional schematic diagram of the longitudinal moving assembly, welding assembly and buffer assembly of the spot welding mechanism of the present invention; Attached Fig.17 It is a three-dimensional schematic diagram of the buffer assembly of the spot welding mechanism of the present invention; Attached Fig.18 It is a three-dimensional schematic diagram of the support leg II of the transverse movement assembly of the spot welding mechanism of the present invention.

[0012] The double-turntable commercial vehicle V-shaped clamp spot welding device of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0013] Attached Figure 2 3D schematic diagram of the double turntable commercial vehicle V-shaped clamp spot welding device of the present invention, Figure 3 is a three-dimensional schematic diagram of the turntable I of the present invention, Figure 4 is a three-dimensional schematic diagram of the turntable I of the present invention from another angle, Figure 5 is a three-dimensional schematic diagram of the driving and driven gears in the gear box of the turntable I of the present invention, and Figure 6 is a three-dimensional schematic diagram of the turntable II of the present invention, Figure 7 is a three-dimensional schematic diagram of the turntable II of the present invention from another angle, Figure 8 is a three-dimensional schematic diagram of the clamping mechanism of the present invention, Fig. 9 is a three-dimensional schematic diagram of the clamping mechanism of the present invention from another angle, Fig.10 is a three-dimensional schematic diagram of the clamping mechanism of the present invention clamping an arc-shaped cassette, Fig.11 3D schematic diagram of the clamping mechanism of the present invention clamping an arc-shaped cassette and an annular cassette, Fig.12 is a three-dimensional schematic diagram of the spot welding mechanism of the present invention, Fig.13 is a three-dimensional schematic diagram of the transverse movement assembly of the spot welding mechanism of the present invention, Fig.14 3D schematic diagram of the longitudinal moving assembly of the spot welding mechanism of the present invention, Fig.15It is a three-dimensional schematic diagram of the welding assembly of the spot welding mechanism of the present invention. In the figure, a is a flat plate cassette, b is an arc cassette; 1 is a support leg Ⅰ; 2 is a turntable Ⅰ, 2-1 is a gear box, 2-2 is a rotating shaft Ⅰ, 2-3 is an air motor Ⅰ, and 2-4 is a disk body Ⅰ; 3 is a turntable Ⅱ, 3-1 is a U-shaped seat Ⅰ, 3-2 is a U-shaped seat Ⅱ, 3-3 is an air motor Ⅱ, 3-4 is a rotating shaft Ⅱ, 3-5 is a support plate, 3-6 is a support plate Ⅰ, and 3-7 is a disk body Ⅱ; 4 is a clamping mechanism, 4-1 is a vertical plate, 4-2 is a horizontal plate, 4-3 is a support plate, 4-4 is a base plate, 4-5 is an arc positioning seat, 4-6 is a two-way cylinder, 4-7 is a push plate, and 4-8 is a positioning column; 5 1 is a transverse movement assembly, 5-1 is a support leg II, 5-2 is a transverse support plate, 5-3 is a slide rail I, 5-4 is a slide seat I, 5-5 is a screw rod I, 5-6 is a motor I, and 5-7 is a longitudinal support plate; 6 is a longitudinal movement assembly, 6-1 is a slide rail II, 6-2 is a slide seat II, 6-3 is a slide plate, 6-4 is a cylinder seat I, and 6-5 is a cylinder I; 7 is a welding assembly, 7-1 is a support plate II, 7-2 is a top plate, 7-3 is a right side plate, 7-4 is a fixed electrode, 7-5 is a slide rail III, 7-6 is a slide seat III, 7-7 is a movable electrode, 7-8 is a left side plate, 7-9 is a cylinder II, and 7-10 is a rear side plate. As can be seen from the figure, the double-turntable commercial vehicle V-clamp spot welding device of the present invention includes a support leg Ⅰ1, a turntable Ⅰ2, a turntable Ⅱ3, a clamping mechanism 4 and a spot welding mechanism; the support leg Ⅰ is a single-column structure, which is arranged at the bottom of the center of the turntable Ⅰ; the turntable Ⅰ is installed on the top of the support leg Ⅰ, including a gear box 2-1, a rotating shaft Ⅰ2-2, an air motor Ⅰ2-3 and a disk body Ⅰ2-4; the gear box is installed on the top of the support leg, including a driving gear and a driven gear that mesh with each other; the rotating shaft Ⅰ is installed in the center hole of the driven gear and extends upward to expose the gear box body; the air motor Ⅰ is fixed to the side of the support leg Ⅰ, and the output shaft is connected to the driving gear shaft of the gear box; the disk body Ⅰ is fixedly installed on the upper surface of the rotating shaft Ⅰ, and a through hole is provided at the position of the disk body Ⅰ corresponding to the installation of the turntable Ⅱ; there are more than two turntables Ⅱ, which are evenly distributed around the circumference and fixedly installed on the disk body Ⅰ, including Including, U-shaped seat Ⅰ3-1, U-shaped seat Ⅱ3-2, pneumatic motor Ⅱ3-3, rotating shaft Ⅱ3-4, supporting disk 3-5, support plate Ⅰ3-6 and disk body Ⅱ3-7; the opening width of the U-shaped seat Ⅰ is larger than the through hole diameter of the disk body Ⅰ, and is fixed to the bottom surface of the through hole of the disk body Ⅰ; the opening width of the U-shaped seat Ⅱ is smaller than the U-shaped seat Ⅰ, and is fixed to the back of the U-shaped seat Ⅰ; the pneumatic motor Ⅱ is fixed to the back of the U-shaped seat Ⅱ; the lower end of the rotating shaft Ⅱ is connected to the output shaft of the pneumatic motor Ⅱ, and the upper end is connected to the center of the supporting disk; the support plate Ⅰ is two rectangular plates, which are fixed vertically on the upper surface of the supporting disk at intervals; the disk body Ⅱ is fixed on the upper surface of the support plate Ⅰ; the clamping mechanism is fixed on the disk body Ⅱ, including, vertical plate 4-1, horizontal plate 4-2, support plate 4-3, base plate 4-4, arc positioning seat 4-5, two-way cylinder 4-6, push plate 4-7 and positioning column 4-8;The vertical plate and the horizontal plate are each in two pieces, and one end of the vertical plate and one end of the horizontal plate are vertically fixedly connected to each other to form an L-shaped support structure; the other end of the vertical plate is vertically fixed to the bottom surface of the disk body II, and the other end of the horizontal plate is vertically connected to the bottom of the support plate; thus, the vertical plate, the horizontal plate and the support plate form a support structure with a U-shaped cross section, and are fixedly connected to the bottom surface of the disk body II; the base plate is fixed to the surface of the disk body II, and three arc positioning seats are evenly distributed on the circumference of the base plate surface; the shape and size of the outer side surface of the arc positioning seat match the inner side of the arc cassette, and a positioning boss is provided in the middle of the arc positioning seat; the width of the positioning boss is the same as the set interval between the arc cassettes; the bidirectional cylinder is fixed to the inner side of the support plate side; the push plate is rectangular and there are two of them, and the inner side surfaces of one end of the two push plates are respectively fixed on the two piston ends of the two-way cylinder; there are two positioning columns, which are respectively fixed on the inner side surfaces of the other ends of the two push plates; the spot welding mechanism is fixed on the platform beside the turntable I, including a transverse movement component 5, a longitudinal movement component 6 and a welding component 7; the transverse movement component is fixed on the platform beside the turntable I, including a support leg II 5-1, a transverse support plate 5-2, a slide rail I 5-3, a slide seat I 5-4, a screw I 5-5, a nut I, a motor I 5-6 and a longitudinal support plate 5-7; there are two support legs II, which are fixed on the platform beside the turntable I at intervals; the transverse support plate is long and strip-shaped, and is horizontally fixed at the upper ends of the two support legs; there are two slide rails I, which are horizontally fixed on the transverse support The upper and lower sides of the support plate; the slide seats Ⅰ are at least four, and two of them are installed on the slide rails Ⅰ respectively; the screw rod Ⅰ is installed in the horizontal middle part of the horizontal support plate through the bearing seats at both ends, and the left end is connected to the rotating shaft of the motor Ⅰ fixed on the left side of the horizontal support plate; the longitudinal support plate is rectangular, vertically fixed on the surface of the slide seat Ⅰ, and the nut Ⅰ fixed on the back side is screwed on the screw rod Ⅰ; the longitudinal movement assembly is installed on the longitudinal support plate, including slide rail Ⅱ 6-1, slide seat Ⅱ 6-2, slide plate 6-3, cylinder seat Ⅰ 6-4 and cylinder Ⅰ 6-5; there are two slide rails Ⅱ, which are vertically fixed on both sides of the longitudinal support plate; there are at least four slide seats Ⅱ, which are installed on the slide rails Ⅱ in a group of two; the slide plate is fixed on the surface of the slide seat Ⅱ; the cylinder seat Ⅰ is a rectangular plate, It is vertically fixed on the longitudinal support plate above the slide rail II; the cylinder I is fixedly mounted on the cylinder seat I, and the piston end is connected to the upper end of the slide plate; the welding assembly is fixed on the slide plate of the longitudinal movement assembly, including support plate II 7-1, top plate 7-2, right side plate 7-3, fixed electrode 7-4, slide rail III 7-5, slide seat III 7-6, movable electrode 7-7, left side plate 7-8, cylinder II 7-9 and rear side plate 7-10; the support plate II is a rectangular plate and is vertically fixed on the surface of the slide plate, and a reinforcing rib is provided between the support plate II and the slide plate; the top plate is fixed on the lower surface of the support plate II; the right side plate is vertically fixed on the right end of the lower surface of the top plate; the pole head of the fixed electrode is fixed to the inner side of the right side plate to the left; the slide rail III is fixed to the middle of the lower surface of the top plate;The slide seat III is installed on the slide rail III; the pole head of the movable electrode is fixed to the right on the back of the slide seat III, and the pole head of the movable electrode is coaxial with the pole head of the fixed electrode; the left side plate is vertically fixed to the left side of the lower surface of the top plate; the cylinder II is fixed to the outer side of the left side plate, and the piston of the cylinder II is connected to the rear side of the movable electrode; the rear side plate is fixed to the rear side of the top plate, and its two ends form a triangular support with the left side plate and the right side plate respectively. The double-turntable commercial vehicle V-type clamp spot welding device of the present invention adopts two turntables, wherein turntable I is used for switching between different workstations, and turntable II is used for clamping workpieces and switching between different welding points. Thus, the automation operation of the entire welding process is basically realized. During specific processing, the arc cassette is placed on the clamping mechanism of turntable II of the assembly station manually or by a robot, and then the flat cassette is placed on the outer side of the arc cassette, and the curved circular holes at both ends of the flat cassette are respectively mounted on the positioning columns (see attached; Fig.10 , 11 ); Turn on the two-way cylinder, and the cylinder piston will pull the two ends of the flat cassette inward to tighten, on the one hand, overcome the elastic restoring force of the cassette so that the shape of the cassette meets the design requirements, and on the other hand, make the flat cassette and the arc cassette in close contact to facilitate welding; pneumatic motor I drives turntable I to rotate, so that turntable II holding the workpiece is turned to the welding station, and at the same time, the other empty turntable II is turned to the assembly station; driven by the longitudinal and transverse moving components, the welding assembly makes the pole head of the fixed electrode and the workpiece clamped on the turntable II The inner surface of the arc-shaped cassette is in contact with the cylinder Ⅱ, and it stays at the set welding point; the piston of cylinder Ⅱ moves forward, so that the pole head of the movable electrode contacts the outer surface of the flat cassette and is opposite to the pole head of the fixed electrode; the spot welding equipment is turned on, and the first welding point is welded; the piston of cylinder Ⅱ moves backward, and the pole head of the fixed electrode moves backward; the pneumatic motor Ⅱ drives the turntable Ⅱ to rotate the set angle; the pole head of the fixed electrode moves forward, and the piston of cylinder Ⅱ moves forward; the spot welding equipment is turned on, and the second welding point is welded; and so on, until all welding points are welded. At the same time, the turntable II at the loading station has clamped a new workpiece to be processed; the pneumatic motor I drives the turntable I to rotate, so that the turntable II that has completed welding is transferred to the material-taking station or the loading station, and at the same time, the other turntable II that has clamped the workpiece is transferred to the welding station; the operator or manipulator at the loading station or the loading station removes the welded workpiece from the turntable II, and then clamps the workpiece to be welded on the turntable II; at the same time, the turntable II at the welding station starts welding another workpiece. It can be seen that the double-turntable commercial vehicle V-clamp spot welding device of the present invention basically realizes automatic operation, which saves time and labor, improves efficiency and ensures welding quality.

[0014] Attached Fig.16 3D schematic diagram of the longitudinal moving assembly, welding assembly and buffer assembly of the spot welding mechanism of the present invention, Fig.17It is a three-dimensional schematic diagram of the buffer assembly of the spot welding mechanism of the present invention; in the figure, 6 is a longitudinal movement assembly, 7 is a welding assembly, 8 is a buffer assembly, 8-1 is an upper connecting plate, 8-2 is a side plate, 8-3 is a buffer body, 8-4 is a core shaft, 8-5 is a buffer spring, and 8-6 is a lower connecting plate. As can be seen from the figure, in order to further improve the welding quality, as one of the preferred solutions, a buffer assembly 8 is also arranged between the longitudinal movement assembly 6 and the welding assembly 7; the buffer assembly includes an upper connecting plate 8-1, a side plate 8-2, a buffer body 8-3, a core shaft 8-4, a buffer spring 8-5 and a lower connecting plate 8-6; the upper connecting plate is a rectangular plate, fixed on the lower surface of the support plate II of the longitudinal movement assembly; the side plate is a rectangular plate and is in two pieces, respectively fixed vertically on the left and right ends of the upper connecting plate; the buffer body is a rectangular parallelepiped structure, and two axial holes are arranged at intervals in the middle of the cross section of the rectangular parallelepiped buffer body; there are two core shafts, which are fixed at intervals between the left and right side plates, and the buffer body is slidably mounted in the middle; there are four buffer springs, two of which are respectively mounted on the core shaft between the buffer body and the side plate; the lower connecting plate is fixed on the lower surface of the buffer body and is fixedly connected to the top plate of the welding assembly. Since the welding assembly is fixed on the lower connection of the buffer assembly, the axial movement of the welding assembly in the electrode is buffered. When the pole tip of the fixed electrode of the welding assembly contacts the inner surface of the arc cassette, the pole tip of the fixed electrode moves toward the arc cassette a set distance, so that the spring on the right side of the buffer assembly is compressed, so that the pole tip of the fixed electrode applies a certain pressure to the inner surface of the arc cassette, ensuring better contact between the pole tip and the arc cassette, and between the arc cassette and the flat cassette, thereby improving the welding quality.

[0015] Attached Fig.18It is a three-dimensional schematic diagram of the support leg II of the transverse movement assembly of the spot welding mechanism of the present invention. In the figure, 5-1 is support leg II, 5-1-1 is an upper sealing plate, 5-1-2 is a lower sealing plate, 5-1-3 is a left support plate, 5-1-4 is a right support plate, 5-1-5 is a middle support plate, 5-1-6 is an upper reinforcing rib, and 5-1-7 is a lower reinforcing rib. As can be seen from the figure, as one of the preferred schemes, the support leg II 5-1 of the transverse movement assembly is a plate-frame column structure, including an upper sealing plate 5-1-1, a lower sealing plate 5-1-2, a left support plate 5-1-3, a right support plate 5-1-4, a middle support plate 5-1-5, an upper reinforcing rib 5-1-6 and a lower reinforcing rib 5-1-7; the upper sealing plate and the lower sealing plate are both rectangular plates of the same size, the left support plate and the right support plate are both long strips of the same shape and size, and the middle support plate is the same length as the left support plate. The left and right support plates are the same as the middle support plate; the left and right support plates are fixed on both sides of the middle support plate, thereby forming a column with an I-shaped cross section; the upper and lower cover plates are fixed on the top and bottom of the I-shaped column, thereby forming a mutually supporting plate-frame-column structure; an upper reinforcing rib in the shape of a triangle is arranged between the bottom surface of the upper cover plate and the outer side surface of the left or right support plate; a lower reinforcing rib in the shape of a long triangle is arranged between the inner side surface of the middle support plate and the upper surface of the lower cover plate. Obviously, the use of the frame-column structure not only effectively guarantees the strength and rigidity of the support leg II, but also effectively reduces the manufacturing cost.

[0016] As one of the preferred solutions, a triangular reinforcing rib 6-6 is provided between the cylinder seat I 6-4 and the longitudinal support plate 5-7 (see attached Fig.14 ). Adding triangular reinforcement ribs can effectively improve the connection strength and rigidity between the cylinder seat I and the longitudinal support plate, ensuring the normal operation of the longitudinal movement assembly.

[0017] Obviously, the beneficial technical effect of the double-turntable commercial vehicle V-clamp spot welding device of the present invention is that it basically realizes automated operation, which saves time and labor, improves efficiency and ensures welding quality.

Claims

1. A V-shaped clamp spot welding tool for commercial vehicles, characterized in that: The spot welding tool comprises: The chassis, positioning ring, end column, positioning seat and fixing seat; the chassis is an annular disc, whose inner diameter is smaller than the inner diameter of the clamp, and whose outer diameter is larger than the outer diameter of the clamp; the positioning ring is a circular ring with a notch and is concentrically fixed to the surface of the chassis, whose inner diameter matches the outer diameter of the flat plate cassette, and whose height is the same as the width of the flat plate cassette; there are two end columns, whose diameters match the rolled circular holes of the two ends of the flat plate cassette, and whose height is the same as the width of the flat plate cassette; the end column is fixed to the chassis at the notch of the positioning ring, and the fixed position is based on the flat plate cassette being set in the inner hollow of the positioning ring, and the rolled circular holes of the two ends are respectively set on the end columns; the positioning seat is an inverted U-shaped structure, and the shape of the U-shaped notch of the positioning seat matches the inner surface of the arc cassette; the positioning seat is fixed to the chassis at the notch of the positioning ring, and the fixed position is based on the flat plate cassette being set in the inner hollow of the positioning ring, the back of the arc cassette is close to the inner surface of the flat plate cassette, and the inner surface of the arc cassette is aligned with the surface of the U-shaped notch of the positioning seat; The fixing seat is an inverted L-shaped structure, including a support plate, a connecting plate, an inverted L-shaped support plate, a first boss, a second boss and a wrench, one end of the support plate is fixed to the bottom surface of the chassis, and the other end is provided with a hinge hole; one end of the connecting plate is hinged to the support plate, and the other end is fixed to the back of the lower end of the vertical side of the inverted L-shaped support plate; a first boss and a second boss are provided on the inner side of the vertical side of the inverted L-shaped support plate; the surface shape of the first boss matches the inner surface of the arc-shaped cassette; the surface shape of the second boss matches the outer surface of the arc-shaped cassette; the wrench is fixed to the outer surface of the horizontal side of the inverted L-shaped support plate; a locking step is also provided on the edge of the inner surface of the horizontal side of the inverted L-shaped support plate; there are three fixing seats, which are evenly distributed on the circumference and installed on the chassis, and the fixed position is such that after pulling the wrench to lock the locking step on the outer side of the upper surface of the positioning ring, the second boss enters between two adjacent arc-shaped cassettes, and the surface of the first boss is tightly fitted with the inner surfaces of the two adjacent arc-shaped cassettes.

2. The commercial vehicle V-clamp spot welding tool according to claim 1, characterized in that: The outer surface of the positioning ring is also provided with welding marks for setting spot welding positions.

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