An automatic welding machine applied to production of automobile exterior parts

Abstract

The application discloses an automatic welding machine applied to automobile outer decoration part production, and particularly relates to the welding field, which is used for welding and fixing a crash beam and an energy absorption box, and comprises a welding table, a crash beam positioning mechanism arranged on the welding table, the crash beam positioning mechanism being used for supporting and positioning the crash beam, and an energy absorption box positioning mechanism arranged on the welding table, the energy absorption box positioning mechanism being used for positioning the energy absorption box on the crash beam. The dynamic pressing assembly is arranged, pressure is continuously applied during the welding process, the convex and the gap caused by heat during the welding process can be overcome through the applied pressure, the connection part of the crash beam and the energy absorption box is ensured to be in the close contact state during the whole welding process, the problem that the brittle intermetallic compound generated during the welding enters between the crash beam and the energy absorption box, the effective welding connection area of the crash beam and the energy absorption box is reduced, and the welding strength is affected is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding, more particularly, the present application relates to an automatic welding machine applied to the production of automobile exterior parts. BACKGROUND

[0002] The automobile exterior part refers to the part installed on the outside of the automobile, used for enhancing the appearance, functionality and protection of the vehicle. These parts are usually directly visible, and participate in aerodynamic design, vehicle protection and decorative enhancement to different degrees. The exterior parts of the automobile are usually divided into decorative exterior parts, functional exterior parts and protective exterior parts.

[0003] The bumper of the automobile belongs to one of the protective exterior parts, and the energy absorption box needs to be welded on the crash beam during the production and processing of the bumper. The main function of the energy absorption box is to absorb impact energy through its deformation when the vehicle collides, so as to reduce the energy transmission to other parts of the vehicle body, thereby reducing the direct impact on the passenger compartment.

[0004] At present, in order to realize the lightweight setting of the bumper, the aluminum alloy material crash beam can be selected, and the energy absorption box still uses high-strength steel for cost and strength. When the aluminum alloy crash beam and the high-strength steel energy absorption box are welded, due to the large difference in physical properties of the materials, brittle intermetallic compounds are easily produced during the welding process. In the welding process, the heat generated by welding usually causes the material to expand. The expansion caused by welding will cause small protrusions and gaps on the contact surface of the crash beam and the energy absorption box. At this time, the brittle intermetallic compounds produced by welding are easy to enter the gap between the contact surface of the crash beam and the energy absorption box, which reduces the effective connection area during the welding process of the crash beam and the energy absorption box, and affects the welding strength. SUMMARY

[0005] The automatic welding machine applied to the production of automobile exterior parts provided by the present application solves the problem that when the aluminum alloy crash beam and the high-strength steel energy absorption box are welded, due to the large difference in physical properties of the materials, brittle intermetallic compounds are easily produced during the welding process. In the welding process, the heat generated by welding usually causes the material to expand. The expansion caused by welding will cause small protrusions and gaps on the contact surface of the crash beam and the energy absorption box. At this time, the brittle intermetallic compounds produced by welding are easy to enter the gap between the contact surface of the crash beam and the energy absorption box, which reduces the effective connection area during the welding process of the crash beam and the energy absorption box, and affects the welding strength.

[0006] To achieve the above object, the present application provides the following technical scheme: An automatic welding machine applied to automobile outer trim production, used for welding and fixing the crash beam and the energy absorption box, comprising a welding table, a crash beam positioning mechanism is arranged on the welding table, the crash beam positioning mechanism is used for supporting and positioning the crash beam, an energy absorption box positioning mechanism is further arranged on the welding table, the energy absorption box positioning mechanism is used for positioning the energy absorption box on the crash beam, the energy absorption box positioning mechanism comprises a dynamic pressing assembly capable of vertically linear motion, the dynamic pressing assembly positions the energy absorption box on the crash beam through vertical linear motion, and the dynamic pressing assembly continuously applies pressure perpendicular to the top of the energy absorption box to the energy absorption box during the welding process.

[0007] A welding mechanism is further arranged on the welding table, the welding mechanism comprises a welding manipulator, and the welding manipulator is used for welding and fixing the connection between the crash beam and the energy absorption box.

[0008] In a preferred embodiment, the energy absorption box positioning mechanism further comprises a transverse linear driving assembly, an output end of the transverse linear driving assembly is provided with a vertical linear driving assembly, the dynamic pressing assembly is installed at the output end of the vertical linear driving assembly, the vertical linear driving assembly is used for driving the dynamic pressing assembly to vertically linearly move, the dynamic pressing assembly comprises a pressing plate one installed at the output end of the vertical linear driving assembly, a pressing plate two is slidably arranged at the bottom of the pressing plate one, the pressing plate two is used for contacting the top of the energy absorption box when the energy absorption box is pressed, and a plurality of elastic members are arranged between the pressing plate one and the pressing plate two.

[0009] In a preferred embodiment, a vertical limiting mechanism is further arranged on the pressing plate one, the vertical limiting mechanism comprises two abutting plates capable of synchronous and opposite motion, the two abutting plates clamp and position the energy absorption box by clamping the two sides of the energy absorption box.

[0010] In a preferred embodiment, the vertical limiting mechanism comprises a driving member installed in the pressing plate one, two output ends of the driving member are each provided with a screw rod, two moving plates are threadedly and movably connected to the two screw rods, the two moving plates are slidably arranged at the two sides of the pressing plate one respectively, and the two abutting plates are fixedly arranged on the corresponding moving plates respectively, one side of each of the two abutting plates close to each other is movably provided with a ball, and the ball rolls in contact with the outer side of the energy absorption box.

[0011] In a preferred embodiment, the bottom of the pressing plate two is provided with a supporting mechanism, the supporting mechanism is used for extending into the energy absorption box when the pressing plate two presses the top of the energy absorption box, and the supporting mechanism comprises an inflatable air bag, the air bag supports the inside of the energy absorption box through inflation.

[0012] In a preferred embodiment, the supporting mechanism further comprises a fixed shaft fixedly arranged at the bottom of the pressing plate two, the air bag is fixedly arranged at the bottom end of the fixed shaft, a gas sending cavity is formed in the fixed shaft, the gas sending cavity is in communication with the inside of the air bag, and an air sending assembly is in communication with the end of the gas sending cavity.

[0013] In a preferred embodiment, the air feeding assembly comprises a piston shaft slidingly arranged in the air feeding cavity, and a top end of the piston shaft is fixedly arranged on the pressing plate.

[0014] In a preferred embodiment, the anti-collision beam positioning mechanism comprises a fixed support assembly, an adjusting support assembly, a pressing assembly, and an abutting assembly, the fixed support assembly and the adjusting support assembly are used for supporting and positioning the anti-collision beam, the pressing assembly is used for pressing and positioning the anti-collision beam, and the abutting assembly is used for abutting and positioning the side edges of the anti-collision beam.

[0015] In a preferred embodiment, the fixed support assembly comprises fixedly arranged end support members and a middle segment support member, the end support members are used for supporting and positioning the two ends of the anti-collision beam, and the middle segment support member is used for supporting and positioning the middle segment bottom of the anti-collision beam, the adjusting support assembly comprises a bottom support member capable of vertically linearly moving, the bottom support member supports and positions the bottom of the anti-collision beam through vertical linear movement, the pressing assembly comprises a pressing member capable of vertically linearly moving, the pressing member presses and positions the top of the anti-collision beam through vertical linear movement, and the abutting assembly comprises an abutting member capable of linearly moving horizontally, the abutting member abuts and positions the side edges of the anti-collision beam through horizontal linear movement.

[0016] In a preferred embodiment, the welding mechanism further comprises a linear driving component, the welding manipulator is installed on an output end of the linear driving component, the linear driving component drives the welding manipulator to linearly move, and the position of the welding manipulator is adjusted.

[0017] The present application has the following beneficial effects:

[0018] The present application has the following beneficial effects:

[0019] The present application has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 FIG. 1 is a schematic diagram of a three-dimensional structure of the present application;

[0021] Figure 2 FIG. 4 is a schematic diagram of a three-dimensional structure of an anti-collision beam positioning mechanism of the present application;

[0022] Figure 3 Fig. 1 is a perspective view of the positioning mechanism of the energy absorption box according to the present application;

[0023] Figure 4 Fig. 2 is a front view of the positioning mechanism of the energy absorption box according to the present application;

[0024] Figure 5 Fig. 3 is a structural view of the dynamic pressing assembly according to the present application;

[0025] Figure 6 Fig. 4 is a perspective view of the welding mechanism according to the present application;

[0026] Figure 7 Fig. 5 is a structural view of the vertical limiting mechanism according to the present application;

[0027] Figure 8 Fig. 6 is a structural view of the supporting mechanism according to the present application;

[0028] Figure 9 Fig. 7 is a working state view of the supporting mechanism according to the present application;

[0029] Figure 10 Fig. 8 is a perspective view of the anti-collision beam and the energy absorption box according to the present application.

[0030] The figures are as follows: 100, anti-collision beam; 101, energy absorption box; 1, welding table; 2, anti-collision beam positioning mechanism; 21, fixed supporting assembly; 211, end supporting piece; 212, middle segment supporting piece; 22, adjusting supporting assembly; 221, bottom supporting piece; 23, pressing assembly; 231, pressing piece; 24, abutting assembly; 241, abutting piece; 3, energy absorption box positioning mechanism; 31, transverse linear driving assembly; 32, vertical linear driving assembly; 33, dynamic pressing assembly; 331, pressing plate one; 332, pressing plate two; 333, elastic piece; 4, welding mechanism; 41, linear driving part; 42, welding mechanical arm; 5, vertical limiting mechanism; 51, driving piece; 52, screw rod; 53, moving plate; 54, abutting plate; 55, ball; 6, supporting mechanism; 61, fixed shaft; 611, gas feeding cavity; 62, air bag; 63, piston shaft. DETAILED DESCRIPTION

[0031] It is necessary to point out here that the following detailed description is only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0032] The accompanying drawings are referred to in the description of the present application Figure 1 , Figure 2The utility model relates to an automatic welding machine applied to the production of automobile outer decoration parts, which is used for welding and fixing the anti-collision beam 100 and the energy absorption box 101, and comprises a welding table 1, wherein the welding table 1 is provided with an anti-collision beam positioning mechanism 2, the anti-collision beam positioning mechanism 2 is used for supporting and positioning the anti-collision beam 100, and the welding table 1 is further provided with an energy absorption box positioning mechanism 3, the energy absorption box positioning mechanism 3 is used for positioning the energy absorption box 101 on the anti-collision beam 100, the energy absorption box positioning mechanism 3 comprises a dynamic pressing assembly 33 capable of vertically moving linearly, the dynamic pressing assembly 33 positions the energy absorption box 101 on the anti-collision beam 100 through vertical linear movement, and the dynamic pressing assembly 33 continuously applies pressure perpendicular to the top of the energy absorption box 101 during the welding process. Figure 3 The welding table 1 is further provided with a welding mechanism 4, the welding mechanism 4 comprises a welding manipulator 42, and the welding manipulator 42 is used for welding and fixing the connection between the anti-collision beam 100 and the energy absorption box 101.

[0033] The welding table 1 is further provided with a welding mechanism 4, the welding mechanism 4 comprises a welding manipulator 42, and the welding manipulator 42 is used for welding and fixing the connection between the anti-collision beam 100 and the energy absorption box 101. Figure 6

[0034] Further, referring to the drawings Figure 4 、 Figure 5 The energy absorption box positioning mechanism 3 further comprises a transverse linear driving assembly 31, the output end of the transverse linear driving assembly 31 is provided with a vertical linear driving assembly 32, the dynamic pressing assembly 33 is installed at the output end of the vertical linear driving assembly 32, the vertical linear driving assembly 32 is used for driving the dynamic pressing assembly 33 to move vertically and linearly, the dynamic pressing assembly 33 comprises a pressing plate one 331 installed at the output end of the vertical linear driving assembly 32, the bottom of the pressing plate one 331 is slidably provided with a pressing plate two 332, the pressing plate two 332 is used for contacting the top of the energy absorption box 101 when the energy absorption box 101 is pressed, and a plurality of elastic elements 333 are arranged between the pressing plate one 331 and the pressing plate two 332.

[0035] It should be noted that the energy absorption box positioning mechanism 3 and the welding mechanism 4 can be fixedly installed on the welding table 1 through a conventional support to realize the installation and fixation of the energy absorption box positioning mechanism 3 and the welding mechanism 4, and the welding manipulator 42 can adopt a mechanical arm with a welding gun installed at the output end, and the welding gun can adopt an automatic or semi-automatic arc welding gun, a plasma arc welding gun or other welding equipment to weld the welding track between the anti-collision beam 100 and the energy absorption box 101.

[0036] ​It should be noted that the transverse linear drive assembly 31 can adopt a linear motor for driving the dynamic pressing assembly 33 to move linearly, and the vertical linear drive assembly 32 can adopt a pneumatic cylinder for driving the dynamic pressing assembly 33 to move vertically linearly. When the crash beam 100 has not been positioned and fixed, the dynamic pressing assembly 33 is driven by the transverse linear drive assembly 31 to move away from the preset welding position. After the crash beam 100 is positioned and fixed by the crash beam positioning mechanism 2, the energy absorption box 101 is placed on the crash beam 100 at the preset welding position, which is the welding position of the crash beam 100 and the energy absorption box 101. Then, the dynamic pressing assembly 33 is driven by the transverse linear drive assembly 31 to move above the energy absorption box 101, and the energy absorption box 101 is preliminarily pressed and positioned by the dynamic pressing assembly 33.

[0037] In the embodiment, the implementation scenario is as follows. First, the dynamic pressing assembly 33 is driven by the transverse linear drive assembly 31 to move away from the preset welding position, and then the crash beam 100 is placed. The crash beam 100 is positioned and fixed by the crash beam positioning mechanism 2. Then, the energy absorption box 101 is placed on the crash beam 100 at the preset welding position. The dynamic pressing assembly 33 is driven by the transverse linear drive assembly 31 to move above the energy absorption box 101. Then, the dynamic pressing assembly 33 is driven by the vertical linear drive assembly 32 to move vertically downward, so that the pressing plate two 332 contacts the top of the energy absorption box 101. The energy absorption box 101 is preliminarily pressed and positioned on the crash beam 100, so as to realize the positioning between the crash beam 100 and the energy absorption box 101. Then, the crash beam 100 and the energy absorption box 101 can be welded and fixed by the welding manipulator 42. During the welding process, the pressing plate one 331 is continuously driven downward by the vertical linear drive assembly 32. Thus, the energy absorption box 101 is continuously subjected to downward pressure by the pressing plate two 332 through the elastic member 333 arranged between the pressing plate one 331 and the pressing plate two 332. The elastic member 333 can be a spring. Through the elastic deformation of the spring, the energy absorption box 101 is continuously subjected to downward pressure by the pressing plate two 332 when the pressing plate one 331 is continuously driven downward. Thus, the pressure is continuously applied during the welding process. The convexity and the gap generated due to heating during the welding process can be overcome by the applied pressure. It is ensured that the connection between the crash beam 100 and the energy absorption box 101 is in a close contact state during the entire welding process. The problem that the brittle intermetallic compound generated during the welding process enters between the crash beam 100 and the energy absorption box 101, thereby reducing the effective welding connection area between the crash beam 100 and the energy absorption box 101 and affecting the welding strength, is solved.

[0038] It also needs to be explained that when the energy absorption box 101 is preliminarily compressed and fixed by the second pressing plate 332, the dynamic compression assembly 33 is first driven downward by the vertical straight line driving assembly 32, and when the second pressing plate 332 contacts the energy absorption box 101, the dynamic compression assembly 33 is continuously driven downward, so that the elastic member 333 is compressed under stress to exert pressure on the energy absorption box 101 to achieve the effect of preliminarily compressing and positioning the energy absorption box 101.

[0039] In the above technical solution, by applying pressure perpendicular to the energy absorption box 101 during welding, the protrusions and gaps caused by heating during the welding process are overcome by the applied pressure, ensuring that the connection between the crash beam 100 and the energy absorption box 101 is in close contact throughout the welding process. However, during the welding process, the welding gun is usually driven to move along the welding trajectory to achieve its welding fixation, and the welding trajectory of the crash beam 100 and the energy absorption box 101 is approximately rectangular. Therefore, during the welding process, as the welding gun moves, the welding gun moves from the initial end of the welding trajectory and returns to the initial end. At this time, since the initial end has already been heated by welding at the beginning, when the welding gun returns to the initial end, further welding is performed at this position, resulting in a difference in heat between this position and other welding positions. The difference in heat can cause uneven heating, which can cause deformation of the welding connection between the crash beam 100 and the energy absorption box 101. At this time, when the pressure is applied, the deformation can cause the vertically applied pressure to deviate. Therefore, the present application also proposes a vertical limiting mechanism 5 for limiting the energy absorption box 101 when applying continuous pressure. Specifically, refer to the drawings Figure 7 The first pressing plate 331 is also provided with a vertical limiting mechanism 5, which includes two resistance plates 54 that can move in opposite directions synchronously. The two resistance plates 54 clamp and position the energy absorption box 101 by clamping the two sides of the energy absorption box 101. The vertical limiting mechanism 5 includes a driving member 51 installed in the first pressing plate 331. The two output ends of the driving member 51 are each provided with a lead screw 52. The two lead screws 52 are each threadedly connected with a moving plate 53. The two moving plates 53 are each slidingly arranged on the two sides of the first pressing plate 331. The two resistance plates 54 are each fixedly arranged on the corresponding moving plate 53. The side of each resistance plate 54 close to the other resistance plate 54 is movably provided with a ball 55. The ball 55 is in rolling contact with the outer side of the energy absorption box 101.

[0040] It should be noted that the driving member 51 is a double-shaft motor, the outer thread pitches of the surfaces of the two lead screws 52 are same and the rotation directions are opposite, after the energy absorption box 101 is positioned, the two lead screws 52 are driven to rotate by the driving member 51, the moving plate 53 is connected with the lead screws 52 through the thread cooperation, the two abutting plates 54 are moved to approach to clamp the energy absorption box 101, the energy absorption box 101 is further positioned, and when the pressure is applied in the welding process, the ball 55 on the surface of the abutting plate 54 can move and roll along the surface of the energy absorption box 101, so that the energy absorption box 101 can be further positioned, and the vertical pressure applied to the energy absorption box 101 can be prevented from being deviated, the energy absorption box 101 is always perpendicular to the crash beam 100, and the problem that the energy absorption box 101 is inclined due to the thermal deformation caused by the uneven heating and the welding strength is affected is avoided.

[0041] In the above technical scheme, the vertical limiting mechanism 5 is arranged to further position the energy absorption box 101, so that the energy absorption box 101 is always perpendicular to the crash beam 100 when the pressure is applied, but in order to ensure the good energy absorption effect (the energy is absorbed through the plastic deformation of the thin-walled energy absorption box 101) and the light weight requirement of the energy absorption box 101, the energy absorption box 101 can also be designed as a thin-walled structure, but compared with the thin-walled energy absorption box 101, the energy absorption box 101 is more likely to be deformed due to the temperature change and the uneven heating caused by the welding heat in the welding process, if the energy absorption box 101 is deformed, the vertical pressure can be continuously applied to the energy absorption box 101 under the action of the vertical limiting mechanism 5, but the deformation can also cause the side of the energy absorption box 101 to be bent and deformed, the brittle intermetallic compound generated in the welding process is easy to enter the connecting part between the crash beam 100 and the energy absorption box 101 due to the side bending, and the welding strength is affected, therefore, the supporting mechanism 6 is also provided, which is used for supporting the inner wall of the energy absorption box 101 in the welding process to reduce the deformation caused by the thin-walled design in the welding process, and specific reference is made to the description of the accompanying drawings Figure 8 、 Figure 9 The bottom of the second pressing plate 332 is provided with the supporting mechanism 6, the supporting mechanism 6 is used for extending into the energy absorption box 101 when the second pressing plate 332 presses the top of the energy absorption box 101, the supporting mechanism 6 comprises the inflatable air bag 62, the air bag 62 supports the inside of the energy absorption box 101 through inflation, the supporting mechanism 6 further comprises the fixed shaft 61 fixedly arranged at the bottom of the second pressing plate 332, the air bag 62 is fixedly arranged at the bottom end of the fixed shaft 61, the fixed shaft 61 is provided with the gas conveying cavity 611, the gas conveying cavity 611 is in communication with the inside of the air bag 62, and the end of the gas conveying cavity 611 is in communication with the gas conveying assembly.

[0042] It should be noted that the air supply assembly can be a gas pump, before welding, the energy absorption box 101 is pressed by the pressing plate two 332, in this process, the air bag 62 can be extended into the energy absorption box 101 through the fixed shaft 61, then the air bag 62 can be supplied with gas through the gas pump, so that the air bag 62 is inflated and expanded, and the edge of the air bag 62 abuts at the welding connection position of the crash beam 100 and the energy absorption box 101, thereby reducing the deformation caused by the thin wall design, and the air bag 62 is arranged to support the inner wall of the energy absorption box 101, which can further improve the supporting and positioning effect of the energy absorption box 101, and avoid the problem that the energy absorption box 101 deviates during welding and affects welding.

[0043] Further, referring to the drawings attached in the specification Figure 9 The application also provides a specific air supply assembly, which comprises a piston shaft 63 slidingly arranged in the air supply cavity 611, and the top end of the piston shaft 63 is fixedly arranged on the pressing plate one 331, before welding, the pressing plate one 331 is driven to move vertically downward, and the energy absorption box 101 is positioned and fixed by the pressing plate two 332, when the pressing plate one 331 drives the piston shaft 63 to slide in the air supply cavity 611, the air bag 62 is inflated and expanded, and during welding, the pressing plate one 331 continuously moves downward, which drives the piston shaft 63 to continuously move downward in the air supply cavity 611, so that the air bag 62 is continuously supplied with air, which has a dynamic supporting effect and further improves the stability of the welding quality.

[0044] It should be noted that the air bag 62 is made of high-temperature resistant material, and the connection between the crash beam 100 and the energy absorption box 101 is arc-shaped, the air bag 62 is arranged to support by inflation, which can also adapt to the arc surface of the connection.

[0045] It should be further noted that the support mechanism 6 is arranged to support the energy absorption box 101, so as to reduce deformation, further ensure the pressing effect, reduce the gap between the crash beam 100 and the energy absorption box 101, ensure the welding strength, and the dynamic pressing assembly 33 can also assist to reduce the possibility of deformation.

[0046] Further, referring to the drawings attached in the specification Figure 2The anti-collision beam positioning mechanism 2 comprises a fixed support assembly 21, an adjusting support assembly 22, a pressing assembly 23 and an abutting assembly 24. The fixed support assembly 21 and the adjusting support assembly 22 are used for supporting and positioning the anti-collision beam 100, the pressing assembly 23 is used for pressing and positioning the anti-collision beam 100, and the abutting assembly 24 is used for abutting and positioning the side edge of the anti-collision beam 100. The fixed support assembly 21 comprises a fixed end support 211 and a middle segment support 212. The end support 211 is used for supporting and positioning the two ends of the anti-collision beam 100, and the middle segment support 212 is used for supporting and positioning the middle segment bottom of the anti-collision beam 100. The adjusting support assembly 22 comprises a bottom support 221 capable of vertically linearly moving. The bottom support 221 supports and positions the bottom of the anti-collision beam 100 through vertical linear movement. The pressing assembly 23 comprises a pressing member 231 capable of vertically linearly moving. The pressing member 231 presses and positions the top of the anti-collision beam 100 through vertical linear movement. The abutting assembly 24 comprises an abutting member 241 capable of linearly moving horizontally. The abutting member 241 abuts and positions the side edge of the anti-collision beam 100 through horizontal linear movement.

[0047] It should be noted that the end support 211 and the middle segment support 212 are fixed support blocks arranged on the welding table 1. When the anti-collision beam 100 is placed, it is only necessary to place the anti-collision beam 100 on the support blocks, so as to facilitate the placement of the anti-collision beam 100. The bottom support 221 can be driven to linearly move by a cylinder, so as to support the bottom of the anti-collision beam 100. The bottom support 221 can be driven to linearly move by a cylinder, so as to press the top of the anti-collision beam 100. The abutting member 241 can be driven to linearly move by a cylinder, so as to abut against the side edge of the anti-collision beam 100 and fix the anti-collision beam 100. Through the cooperation of the fixed support assembly 21, the adjusting support assembly 22, the pressing assembly 23 and the abutting assembly 24, the positioning and fixing of the anti-collision beam 100 are realized.

[0048] Referring to the drawings accompanying the specification Figure 6 The welding mechanism 4 further comprises a linear driving component 41. The welding manipulator 42 is installed at the output end of the linear driving component 41. The linear driving component 41 drives the welding manipulator 42 to linearly move, so as to adjust the position of the welding manipulator 42.

[0049] It should be noted that the linear driving component 41 can drive a linear motor. The linear motor drives the welding manipulator 42 to linearly move, so as to adjust the position of the welding manipulator 42 before and after welding.

[0050] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. An automatic welding machine for the production of automotive exterior parts, used for welding and fixing a crash beam (100) to an energy-absorbing box (101), comprising a welding table (1), wherein a crash beam positioning mechanism (2) is provided on the welding table (1), the crash beam positioning mechanism (2) being used to support and position the crash beam (100), characterized in that, The welding table (1) is also provided with an energy-absorbing box positioning mechanism (3). The energy-absorbing box positioning mechanism (3) is used to position the energy-absorbing box (101) on the anti-collision beam (100). The energy-absorbing box positioning mechanism (3) includes a dynamic pressing component (33) that can move vertically. The dynamic pressing component (33) presses and positions the energy-absorbing box (101) on the anti-collision beam (100) through vertical linear movement. During the welding process, the dynamic pressing component (33) continuously applies pressure perpendicular to the top of the energy-absorbing box (101). The welding table (1) is also provided with a welding mechanism (4), which includes a welding robot (42) for welding and fixing the connection between the anti-collision beam (100) and the energy-absorbing box (101); The energy-absorbing box positioning mechanism (3) further includes a horizontal linear drive assembly (31), and a vertical linear drive assembly (32) is provided at the output end of the horizontal linear drive assembly (31). The dynamic pressing assembly (33) is installed at the output end of the vertical linear drive assembly (32). The vertical linear drive assembly (32) is used to drive the dynamic pressing assembly (33) to move vertically. The dynamic pressing assembly (33) includes a pressure plate one (331) installed at the output end of the vertical linear drive assembly (32). A pressure plate two (332) is slidably provided at the bottom of the pressure plate one (331). The pressure plate two (332) is used to contact the top of the energy-absorbing box (101) when pressing the energy-absorbing box (101). A plurality of elastic elements (333) are provided between the pressure plate one (331) and the pressure plate two (332). The pressure plate (331) is also provided with a vertical limiting mechanism (5), which includes two abutments (54) that can move synchronously in opposite directions. The two abutments (54) clamp and position the energy-absorbing box (101) by clamping the two sides of the energy-absorbing box (101). The bottom of the pressure plate 2 (332) is provided with a support mechanism (6). The support mechanism (6) is used to extend into the energy absorption box (101) when the pressure plate 2 (332) presses the top of the energy absorption box (101). The support mechanism (6) includes an inflatable airbag (62). The airbag (62) supports the inside of the energy absorption box (101) by inflating.

2. The automatic welding machine for automotive exterior parts production according to claim 1, characterized in that: The vertical limiting mechanism (5) includes a drive component (51) installed in the pressure plate (331). Both output ends of the drive component (51) are equipped with lead screws (52). The two lead screws (52) are threadedly connected to movable plates (53). The two movable plates (53) are slidably disposed on both sides of the pressure plate (331). The two abutments (54) are fixedly disposed on the corresponding movable plates (53). The two abutments (54) are movably disposed on the side of their proximity. The balls (55) are in rolling contact with the outer side of the energy absorption box (101).

3. An automatic welding machine for automotive exterior parts production according to claim 2, characterized in that: The support mechanism (6) also includes a fixed shaft (61) fixedly installed at the bottom of the pressure plate (332). The airbag (62) is fixedly installed at the bottom end of the fixed shaft (61). An air delivery chamber (611) is opened in the fixed shaft (61). The air delivery chamber (611) is connected to the inside of the airbag (62), and the end of the air delivery chamber (611) is connected to an air delivery component.

4. An automatic welding machine for automotive exterior parts production according to claim 3, characterized in that: The air delivery assembly includes a piston shaft (63) that is slidably disposed in the air delivery chamber (611), and the top end of the piston shaft (63) is fixedly disposed on the pressure plate (331).

5. An automatic welding machine for automotive exterior parts production according to claim 4, characterized in that: The anti-collision beam positioning mechanism (2) includes a fixed support component (21), an adjustable support component (22), a pressing component (23), and an abutment component (24). The fixed support component (21) and the adjustable support component (22) are used to support and position the anti-collision beam (100). The pressing component (23) is used to press and position the anti-collision beam (100). The abutment component (24) is used to press and position the side of the anti-collision beam (100).

6. An automatic welding machine for automotive exterior parts production according to claim 5, characterized in that: The fixed support assembly (21) includes a fixed end support (211) and a middle support (212). The end support (211) is used to support and position the two ends of the anti-collision beam (100). The middle support (212) is used to support and position the bottom of the middle section of the anti-collision beam (100). The adjustable support assembly (22) includes a bottom support (221) that can move vertically. The bottom support (221) supports and positions the bottom of the anti-collision beam (100) through vertical linear movement. The pressing assembly (23) includes a pressing member (231) that can move vertically. The pressing member (231) presses and positions the top of the anti-collision beam (100) through vertical linear movement. The abutting assembly (24) includes an abutting member (241) that can move horizontally. The abutting member (241) presses and positions the side of the anti-collision beam (100) through horizontal linear movement.

7. An automatic welding machine for automotive exterior parts production according to claim 6, characterized in that: The welding mechanism (4) further includes a linear drive component (41), and the welding robot (42) is installed at the output end of the linear drive component (41). The linear drive component (41) adjusts the position of the welding robot (42) by driving the welding robot (42) to move linearly.

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