An intelligent positioning welding system for automobile CD column body parts and its working method

Abstract

The invention discloses an intelligent positioning welding system for automobile CD-pillar body parts and a working method thereof, and specifically relates to the technical field of automobile parts welding. The invention moves automobile C-pillar body parts and automobile D-pillar body parts on both sides of a welding box toward a flip assembly, and after entering into a groove, the end faces thereof are kept corrected and fitted to ensure welding accuracy. A second clamp unit and a third clamp unit are positioned according to thickness adaptively, and a bracket is rotated twice. First, the bracket is rotated 90 degrees clockwise to drive the automobile C-pillar body parts and automobile D-pillar body parts clamped together to change from a vertical state to a horizontal state. Then, the flip assembly moves together with a circulation frame to enter into different welding sealing chambers, and the upper welding unit welds the front side of the connection of the automobile CD-pillar body parts; and the bracket rotates 180 degrees counterclockwise following the circulation frame to rotate to a lower position, and the lower welding unit welds the reverse side of the connection of the automobile CD-pillar body parts, and double-sided welding is performed.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts welding, in particular to an intelligent positioning welding system for automobile CD column body parts and a working method thereof. Background Art

[0002] Station wagons, MPVs or full-size SUVs contain C-pillars and D-pillars. The body parts of the car CD-pillar are structurally composed of two parts, the C-pillar and the D-pillar. The C-pillar is located on the side of the car body, between the front and rear windows, and is usually a support column connecting the roof and the lower part of the body. The D-pillar is located behind the C-pillar, usually at the rear of the car body, connecting the roof and the lower part of the body, and is located in the trunk area. The CD-pillar serves as an important supporting structure for the car body. The goal of welding is to connect the various body parts of the C-pillar and the D-pillar (such as inner panels, outer panels, reinforcement panels, etc.) to ensure the strength and stability of the car body. The welding of the car C-pillar and the D-pillar is usually carried out in a special area of ​​the car production line.

[0003] After searching, the invention patent with publication number CN119187790A discloses a CNC welding device for automobile body sheet metal parts. The welding head welds the welds of two sheet metal parts. After welding, it contacts the cleaning brush to clean the surface of the welding head, remove welding slag or debris, keep the welding head clean, and improve the stability of each welding.

[0004] In the field of automobile manufacturing, the position of automobile C-pillar body parts and automobile D-pillar body parts and the quality control of welding on the welding surface are very important. Therefore, the present invention proposes an intelligent positioning welding system for automobile CD-pillar body parts and a working method thereof. Summary of the invention

[0005] The object of the present invention is to provide an intelligent positioning welding system for automobile CD column body parts and a working method thereof to solve the problems mentioned in the above background technology.

[0006] The present invention can be achieved through the following technical solutions:

[0007] An intelligent positioning welding system for a CD column body part of an automobile comprises a welding box, wherein movable boxes are arranged on both sides of the welding box along the track direction, the interior of the welding box is a hollow structure, a push seal assembly is arranged inside the movable box, a plurality of welding seal chambers formed by the push seal assemblies are arranged inside the welding box, welding units are arranged on the top and bottom surfaces of the inner cavity of the welding box, and two strip-shaped circulation racks are installed in the middle of the inner cavity of the welding box, and a plurality of flipping assemblies for positioning and correcting the CD column body part of the automobile are installed between the two circulation racks;

[0008] The turning assembly comprises two mounting plates mounted in parallel on the circulation frame, and the upper end of the mounting plate is provided with a bracket which rotates twice inside the circulation frame;

[0009] During one rotation, the bracket rotates 90 degrees clockwise, changing from the initial vertical state to the horizontal state, and the front side of the connection between the CD column and the body of the car is welded;

[0010] During the second rotation, the bracket rotates 180 degrees counterclockwise to weld the reverse side of the connection between the CD column and the car body;

[0011] The lower surface of the bracket is provided with a pair of grooves, and the surface of the bracket is penetrated with a hollow groove for the welding unit to enter for welding, the hollow groove is communicated with the pair of grooves, and one side surface of the bracket is respectively provided with a clamp unit 2 and a clamp unit 3, and the clamp unit 2 and the clamp unit 3 are arranged on both sides of the hollow groove;

[0012] The clamp unit 2 and the clamp unit 3 both include an upper clamping jaw and a lower clamping jaw, and the clamp unit 2 and the clamp unit 3 are used for positioning and clamping the C-pillar body part and the D-pillar body part of the automobile respectively.

[0013] A further technical improvement of the present invention is that the lower clamping jaw is slidably mounted on the corresponding groove, an electric push rod three is mounted on the extension plate on the upper surface of the bracket, the pushing end of the electric push rod three is connected to a connecting rod, the U-shaped end of the connecting rod slides on the bracket, and the upper clamping jaw is slidably mounted on the U-shaped end of the connecting rod and is perpendicular to the sliding direction of the connecting rod.

[0014] A further technical improvement of the present invention is that a driving shaft driven by a rotating motor is provided at the connection between the bracket and the mounting plate, a rail groove is provided on the inner wall surface of each mounting plate, and an arc rod slidably plugged into the corresponding rail groove is installed on the other side of the bracket.

[0015] A further technical improvement of the present invention is that: a vacant portion is provided on one side surface of each moving box, a side plate is slidably provided in the vacant portion, an insertion opening is provided on the upper portion of the side plate, and a stable clamping unit for clamping the corresponding CD column body part of the car is provided inside the side plate, an electric push rod 1 is installed on the outer surface of the moving box, a connecting plate is installed on the pushing end of the electric push rod 1, and the end surface of the connecting plate is fixed to the side plate;

[0016] Movable rails are arranged on both sides of the welding box, and the movable rails are slidably arranged with the movable box and the side plate on the same side.

[0017] A further technical improvement of the present invention is that the stable clamping unit comprises a material placing rack, the upper surface of which is slidably provided with a bearing seat that moves toward the flip assembly in the welding box, the middle part of the upper surface of the bearing seat is provided with an entry groove for the automobile C-pillar body part or the automobile D-pillar body part to pass through, and the surface of the bearing seat is provided with a clamp unit 1 for clamping the automobile C-pillar body part or the automobile D-pillar body part;

[0018] The entry slot is arranged flush with the counter slot at the same height.

[0019] A further technical improvement of the present invention is that the push seal assembly includes a plurality of accommodating cavities arranged on the inner wall surfaces of the corresponding side moving boxes, a sliding rod is installed inside each of the accommodating cavities, a contact frame pushed by an external force is sleeved on the sliding rod, and a spring is sleeved on the outside of the sliding rod, two sealing plates are provided on the surface of the contact frame, and the end faces of the sealing plates are provided with strip grooves for the circulation frame to pass through, and the end faces of the sealing plates on both sides are in close contact.

[0020] A further technical improvement of the present invention is that a driving cavity communicating with the accommodating cavity is provided inside the moving box, a rotating rod is rotatably installed inside the driving cavity, a plurality of cams are fixed on the rotating rod, and the cams are always in contact with the rollers on the corresponding contact frames.

[0021] A further technical improvement of the present invention is that a discharge channel is provided at the end of the upper surface of the welding box, a discharge door is slidably provided in the discharge channel, and a laser sensor is embedded and installed on the lower surface of the discharge door.

[0022] A working method of an intelligent positioning welding system for a CD column body part of an automobile, the working method comprising the following steps:

[0023] Step 1: First, the moving boxes on both sides are kept in contact with the welding boxes, the side panels on the corresponding sides are slid open, and the C-pillar body parts and the D-pillar body parts of the automobile are respectively loaded into the stable clamping units in the side panels through the insertion ports;

[0024] Step 2: After that, the stable clamping unit pushes the automobile C-pillar body part and the automobile D-pillar body part in the bearing seat to move synchronously toward the flip assembly, and the automobile C-pillar body part and the automobile D-pillar body part enter the groove from two directions until their end faces are corrected and fitted, and the clamping unit 2 and the clamping unit 3 respectively adaptively position the automobile C-pillar body part and the automobile D-pillar body part according to the thickness of the automobile;

[0025] Step 3: The bracket rotates 90 degrees clockwise and follows the transmission of the circulation frame into different welding sealing chambers. The upper welding unit welds the front side of the connection between the car CD column and the body part. When the circulation frame rotates to the lower position, the bracket rotates 180 degrees counterclockwise and the lower welding unit welds the reverse side of the connection between the car CD column and the body part.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] By moving the C-pillar and D-pillar parts on both sides of the welding box toward the flip assembly, after entering the groove, keep the end faces corrected and fitted to ensure the accuracy of welding, the clamp unit 2 and the clamp unit 3 are positioned according to the thickness adaptively, and the bracket rotates twice. First, the bracket rotates 90 degrees clockwise, driving the clamped C-pillar and D-pillar parts of the automobile to change from vertical to horizontal. Then the flip assembly moves with the circulation frame and enters different welding sealing chambers. The upper welding unit aligns the connection between the CD-pillar and the automobile body parts. Front welding: Follow the circulation frame to rotate to the lower position, the bracket rotates 180 degrees counterclockwise, and the welding unit below welds the reverse side of the connection of the car CD column body parts. Double-sided welding, first weld the middle part of the connection of the car CD column body parts, and then gradually weld the edges. Since the welding of the middle part is completed, the relatively cool area will serve as a cooling support, avoiding the shrinkage of the edge part affected by excessive heat during edge welding, so that the heat of the connection of the car CD column body parts is evenly distributed, reducing the temperature difference in the welding area, avoiding deformation caused by heat concentration, and improving welding quality;

[0028] By setting up multiple welding sealing chambers, the rotating rod rotates to drive the cam. Under the push of the longest side of the cam and the roller, the contact frame slides along the slide bar and drives the corresponding sealing plate into the welding box. At this time, the sealing plates on both sides are in contact and docking, and the welding box is divided into multiple welding sealing chambers. The adjacent welding operations do not interfere with each other, and the sealing of the automobile CD column body parts is maintained in each welding step. After the welding is completed, it is taken out through the discharge channel on the top of the welding box, and the degree of automation is high.

[0029] The CD-pillar body parts of the automobile are driven by the flip assembly and follow the circulation frame into different welding sealing chambers. After entering the different welding sealing chambers, they will remain still. At the same time, the side panels and the mobile box slide open to facilitate the loading of the next C-pillar body parts and the D-pillar body parts of the automobile and re-enter the welding box to realize the cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0031] Figure 1 It is a schematic diagram of the external structure of the present invention;

[0032] Figure 2 It is a partial three-dimensional structural schematic diagram of the side plate and the moving box of the present invention;

[0033] Figure 3 This is a schematic diagram of the internal installation structure of the side panels and the mobile box of the present invention;

[0034] Figure 4It is a schematic diagram of the installation structure of the material placing rack of the present invention;

[0035] Figure 5 It is a schematic diagram of the internal structure connection of the welding box of the present invention;

[0036] Figure 6 A schematic diagram of the structure of the sealing plate of the present invention;

[0037] Figure 7 For the present invention Figure 5 A partial enlarged view of the middle A;

[0038] Figure 8 It is a partial three-dimensional structural schematic diagram of the bracket and the circulation rack of the present invention.

[0039] In the figure: 1. welding box; 2. moving box; 3. discharge door; 4. side plate; 5. connecting plate; 6. electric push rod 1; 7. moving rail; 8. placement entrance; 9. unloading rack; 10. bearing seat; 11. fixture unit 1; 12. entry slot; 13. driving chamber; 14. rotating rod; 15. cam; 16. accommodating chamber; 17. contact rack; 18. sealing plate; 19. welding unit; 20. circulation rack; 21. bracket; 23. strip groove; 24. mounting plate; 25. rail groove; 26. arc rod; 27. driving shaft; 28. electric push rod 3; 29. ​​connecting rod; 31. fixture unit 2; 32. hollow slot; 33. counter slot; 34. fixture unit 3. DETAILED DESCRIPTION

[0040] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0041] See also Figure 1-Figure 8 As shown, the present invention provides an intelligent positioning welding system for automobile CD pillar body parts, comprising a welding box 1, movable boxes 2 are arranged on both sides of the welding box 1 along the track direction, automobile C pillar body parts and automobile D pillar body parts are respectively installed in the movable boxes 2 on both sides, the interior of the welding box 1 is a hollow structure, a push seal assembly is arranged inside the movable box 2, a plurality of welding seal chambers formed by the push seal assemblies are arranged inside the welding box 1, welding units 19 are arranged on the top and bottom surfaces of the inner cavity of the welding box 1, and two strip-shaped circulation racks 20 are installed in the middle of the inner cavity of the welding box 1, and a plurality of flipping assemblies for positioning and correcting automobile CD pillar body parts are installed between the two circulation racks 20;

[0042] The flip assembly includes two mounting plates 24 mounted in parallel on the circulation frame 20, and the upper end of the mounting plate 24 is provided with a bracket 21 that rotates twice inside the circulation frame 20;

[0043] During one rotation, the bracket 21 rotates 90 degrees clockwise, changing from an initial vertical state to a horizontal state, and welding the front of the connection between the CD column and the body of the automobile;

[0044] During the second rotation, the bracket 21 rotates 180 degrees counterclockwise to weld the reverse side of the connection between the CD column and the vehicle body;

[0045] The lower surface of the bracket 21 is provided with a pair of grooves 33, and the surface of the bracket 21 is penetrated with a hollow groove 32 for the welding unit 19 to enter for welding, the hollow groove 32 is communicated with the pair of grooves 33, and one side surface of the bracket 21 is respectively provided with a clamp unit 2 31 and a clamp unit 3 34, and the clamp unit 2 31 and the clamp unit 3 34 are arranged on both sides of the hollow groove 32;

[0046] The second clamp unit 31 and the third clamp unit 34 both include an upper clamping jaw and a lower clamping jaw, and the second clamp unit 31 and the third clamp unit 34 are used for positioning and clamping the C-pillar body part and the D-pillar body part of the automobile respectively.

[0047] When the welding box 1 is used to weld the C-pillar body part and the D-pillar body part of the automobile, the moving boxes 2 on both sides are close to the welding box 1 along the setting direction of the track and fit together with it, and then the C-pillar body part and the D-pillar body part of the automobile in the moving box 2 are moved close to the flip assembly in the welding box 1 at the same time. In the initial state, the bracket 21 in the flip assembly remains in a vertical state, such as Figure 8 As shown, in this state, it is convenient for the automobile C-pillar body part and the automobile D-pillar body part to smoothly enter the groove 33 until the end faces of the automobile C-pillar body part and the automobile D-pillar body part are corrected and fitted, and then the clamp unit 2 31 and the clamp unit 3 34 are respectively adaptively positioned according to the thickness of the automobile C-pillar body part and the automobile D-pillar body part, and the intelligent clamping limit is followed by the bracket 21 rotating 90 degrees clockwise. At this time, the bracket 21 drives the clamped automobile C-pillar body part and the automobile D-pillar body part to change from a vertical state to a horizontal state. It should be noted that the width of the automobile C-pillar body part and the automobile D-pillar body part does not exceed the straight-line distance of the two circulation frames 20. The bracket 21 performs a flipping motion of rotating 90 degrees clockwise on the two circulation frames 20 to avoid interference with the automobile C-pillar body part and the automobile D-pillar body part during flipping, that is, Figure 5The angle shown is then adjusted, and the flip assembly moves with the circulation rack 20 to enter different welding sealing chambers, and the upper welding unit 19 welds the front side of the connection between the automobile CD column and the body part; when the circulation rack 20 is rotated to the lower position, the bracket 21 rotates 180 degrees counterclockwise, and the lower welding unit 19 welds the back side of the connection between the automobile CD column and the body part. When welding the front and back sides, a welding sequence from the middle to the edge is adopted, that is, the middle part of the connection between the automobile CD column and the body part is welded first, and then the edges are welded step by step. Since the welding of the middle part is completed, the relatively cool area will serve as a cooling support, avoiding excessive heat during edge welding that affects the shrinkage of the edge part, so that the heat at the connection between the automobile CD column and the body part is evenly distributed, the temperature difference in the welding area is reduced, deformation caused by heat concentration is avoided, and the welding quality is improved.

[0048] When welding the front side of the connection between the automobile CD pillar and the body part, the upper welding unit 19 performs spot welding, laser welding and arc welding in sequence; similarly, the lower welding unit 19 welds the reverse side of the connection between the automobile CD pillar and the body part in the same way to ensure the accuracy and strength of the welding.

[0049] See also Figure 8 As shown, the lower clamping jaw is slidably mounted on the groove 33, an electric push rod 3 28 is mounted on the extension plate on the upper surface of the bracket 21, the pushing end of the electric push rod 3 28 is connected to a connecting rod 29, the U-shaped end of the connecting rod 29 slides on the bracket 21, and the upper clamping jaw is slidably mounted on the U-shaped end of the connecting rod 29 and is perpendicular to the sliding direction of the connecting rod 29;

[0050] Since the initial position of the bracket 21 is set vertically, the automobile C-pillar body part and the automobile D-pillar body part in the moving box 2 accurately enter the matching groove 33 in the bracket 21, and then the electric push rod 3 28 pushes the connecting rod 29 downward, so that the upper clamping jaws in the clamp unit 2 31 and the clamp unit 3 34 are synchronously moved downward to fit with the upper end surfaces of the automobile C-pillar body part and the automobile D-pillar body part on the corresponding side, and then the upper clamping jaws and the lower clamping jaws in the clamp unit 2 31 and the clamp unit 3 34 are adaptively positioned and clamped according to the thickness of the automobile C-pillar body part and the automobile D-pillar body part, thereby facilitating the automobile C-pillar body part and the automobile D-pillar body part to follow the rotation of the bracket 21 twice, and adapting to the positioning welding of the connection between the automobile C-pillar body part and the automobile D-pillar body part.

[0051] See also Figure 7As shown, a driving shaft 27 driven by a rotating motor is provided at the connection between the bracket 21 and the mounting plate 24, and a rail groove 25 is provided on the inner wall surface of each mounting plate 24. An arc rod 26 slidably plugged into the corresponding rail groove 25 is installed on the other side of the bracket 21. The driving shaft 27 rotates in two directions, that is, after rotating 90 degrees clockwise, it rotates 180 degrees counterclockwise when reaching the welding unit 19 below. Each time it rotates, the arc rod 26 slides within the rail groove 25.

[0052] See also Figure 2 As shown, a vacant portion is provided on one side surface of each moving box 2, a side plate 4 is slidably provided in the vacant portion, an insertion opening 8 is provided on the upper portion of the side plate 4, and a stable clamping unit for clamping the corresponding CD column body part of the car is provided inside the side plate 4, an electric push rod 6 is installed on the outer surface of the moving box 2, and a connecting plate 5 is installed on the pushing end of the electric push rod 6, and the end surface of the connecting plate 5 is fixed to the side plate 4;

[0053] Movable rails 7 are provided on both sides of the welding box 1, and the movable rails 7 are slidably arranged with the movable box 2 and the side plate 4 on the same side. When the two movable boxes 2 are fitted with the welding box 1, the electric push rod 6 pushes the connecting plate 5 and drives the side plate 4 to slide from the vacant part. At this time, the side plate 4 is in an open state, and the automobile C-pillar body parts and the automobile D-pillar body parts are loaded into the corresponding stable clamping units through the upper insertion opening 8.

[0054] See also Figure 3 and Figure 4 As shown, the stable clamping unit includes a material discharging rack 9 fixedly connected to the inner wall of the side panel 4, and a bearing seat 10 is slidably provided on the upper surface of the material discharging rack 9 and moves toward the flip assembly in the welding box 1. An entry groove 12 for the automobile C-pillar body part or the automobile D-pillar body part to pass through is provided in the middle of the upper surface of the bearing seat 10, and a clamp unit 11 for clamping the automobile C-pillar body part or the automobile D-pillar body part is installed on the surface of the bearing seat 10. The automobile C-pillar body part and the automobile D-pillar body part are respectively loaded into the entry groove 12 in the bearing seat 10 through the corresponding side inlet 8, and then the automobile C-pillar body part and the automobile D-pillar body part are clamped by the clamp unit 11 on the corresponding side, and then the side panel 4 slides flush with the moving box 2, that is, the moving end surface of the side panel 4 is in contact with the welding box 1, and the automobile C-pillar body part and the automobile D-pillar body part are driven to approach the groove 33 in the flip assembly through the horizontal movement of the bearing seat 10;

[0055] The entry groove 12 is arranged flush with the matching groove 33, which is convenient for pushing the automobile C-pillar body part and the automobile D-pillar body part in the entry groove 12 into the matching groove 33 so that their end faces can be corrected and fitted. When the automobile C-pillar body part and the automobile D-pillar body part enter the matching groove 33, the upper clamping jaws and the lower clamping jaws in the clamp unit 2 31 and the clamp unit 3 34 adaptively position and clamp according to the thickness of the automobile C-pillar body part and the automobile D-pillar body part. At this time, the clamp unit 11 no longer clamps and re-enters the unloading rack 9, that is, enters the area of ​​the side panel 4.

[0056] See also Figure 3 and Figure 6 As shown, the push seal assembly includes a plurality of accommodating cavities 16 arranged on the inner wall surface of the corresponding side moving box 2, a slide rod is installed inside each accommodating cavity 16, a contact frame 17 pushed by an external force is sleeved on the slide rod, and a spring is sleeved on the outside of the slide rod, two sealing plates 18 are arranged on the surface of the contact frame 17, and the end surface of the sealing plate 18 is provided with a strip groove 23 for the circulation frame 20 to pass through, and the end surfaces of the sealing plates 18 on both sides are in close contact;

[0057] A driving chamber 13 communicating with the accommodating chamber 16 is provided inside the moving box 2, and a rotating rod 14 is rotatably installed inside the driving chamber 13. A plurality of cams 15 are fixedly provided on the rotating rod 14, and the cams 15 are always in contact with the rollers on the corresponding contact racks 17. When the automobile C-pillar body parts and the automobile D-pillar body parts in the flip assembly follow the circulation rack 20 to enter the upper welding unit 19, the longest side of the cam 15 pushes against the roller, so that the contact rack 17 drives the corresponding sealing plate 18 to enter the welding box 1, and then divides the welding box 1 into a plurality of welding sealing chambers. The adjacent welding operations do not interfere with each other, so as to maintain the sealing of the welding of the automobile CD-pillar body parts. In each welding, the automobile C-pillar body parts and the automobile D-pillar body parts adopt different welding methods in different welding sealing chambers to enhance the welding strength of the automobile C-pillar body parts and the automobile D-pillar body parts.

[0058] See also Figure 5 As shown, a discharge channel is provided at the end of the upper surface of the welding box 1, and a discharge door 3 is slidably provided in the discharge channel. A laser sensor is embedded and installed on the lower surface of the discharge door 3. After welding, the C-pillar body parts and the D-pillar body parts of the automobile are returned to the position of the initial flip assembly through the circulation frame 20. At this time, the bracket 21 is in the initial vertical state, and the discharge door 3 is slid open, and the CD-pillar body parts of the automobile are clamped and taken out by an external mechanical arm.

[0059] The present invention provides a working method of an intelligent positioning welding system for a CD column body part of an automobile, and the working method comprises the following steps:

[0060] Step 1: First, the moving boxes 2 on both sides are kept in contact with the welding box 1, and the side panels 4 on the corresponding sides are slid open, and the C-pillar body parts and the D-pillar body parts of the automobile are respectively installed into the stable clamping units in the side panels 4 through the insertion openings 8;

[0061] Step 2: After that, the stable clamping unit pushes the C-pillar body part and the D-pillar body part of the automobile in the bearing seat 10 to move synchronously toward the flip assembly, and the C-pillar body part and the D-pillar body part of the automobile enter the groove 33 from two directions until their end faces are corrected and fitted, and the clamp unit 2 31 and the clamp unit 3 34 are respectively positioned adaptively according to the thickness of the C-pillar body part and the D-pillar body part of the automobile;

[0062] Step 3, the bracket 21 rotates 90 degrees clockwise and follows the transmission of the circulation frame 20 to enter different welding sealing chambers, and the upper welding unit 19 welds the front side of the connection between the automobile CD column and the body part; when following the circulation frame 20 to rotate to the lower position, the bracket 21 rotates 180 degrees counterclockwise, and the lower welding unit 19 welds the reverse side of the connection between the automobile CD column and the body part.

[0063] When the present invention is in use, the automobile C-pillar body parts and the automobile D-pillar body parts on both sides of the welding box 1 are moved toward the flip assembly, and after entering the groove 33, the end faces thereof are kept corrected and fitted, and the clamp unit 2 31 and the clamp unit 3 34 are positioned according to the thickness adaptively, and the bracket 21 is rotated twice. First, the bracket 21 is rotated 90 degrees clockwise, driving the automobile C-pillar body parts and the automobile D-pillar body parts clamped together to change from a vertical state to a horizontal state, and then the flip assembly moves together with the circulation frame 20 to enter different welding sealing chambers, and the upper welding unit 19 is used to align the automobile CD The front side of the connection between the pillar and the body parts is welded; the circulating frame 20 rotates to the lower position, the bracket 21 rotates 180 degrees counterclockwise, and the welding unit 19 below welds the back side of the connection between the CD pillar and the body parts of the automobile. The middle part of the connection between the CD pillar and the body parts of the automobile is welded first, and then the edges are welded step by step. Since the welding of the middle part is completed, the relatively cool area will serve as a cooling support, avoiding the shrinkage of the edge part affected by excessive heat during edge welding, so that the heat of the connection between the CD pillar and the body parts of the automobile is evenly distributed, reducing the temperature difference in the welding area, avoiding deformation caused by heat concentration, and improving the welding quality;

[0064] By setting up multiple welding sealing chambers, the rotating rod 14 rotates to drive the cam 15. Under the push of the longest side of the cam 15 and the roller, the contact frame 17 slides along the slide rod and drives the corresponding sealing plate 18 to enter the welding box 1. At this time, the sealing plates 18 on both sides are in contact and docking, and the welding box 1 is divided into multiple welding sealing chambers. The adjacent welding operations do not interfere with each other, and the sealing of the automobile CD column body parts is maintained in each welding step; after the welding is completed, it is taken out through the discharge channel on the top of the welding box 1, and the degree of automation is high.

[0065] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An intelligent positioning welding system for a CD column body part of an automobile, comprising a welding box (1), characterized in that: Moving boxes (2) are provided on both sides of the welding box (1) along the track direction, and the interior of the welding box (1) is a hollow structure; A push seal assembly is arranged inside the moving box (2); A plurality of welding sealing chambers formed by push-sealing components are arranged inside the welding box (1); Welding units (19) are arranged on the top and bottom surfaces of the inner cavity of the welding box (1); Two strip-shaped circulation racks (20) are installed in the middle of the inner cavity of the welding box (1); A turning assembly is arranged between two circulation racks (20) and is used for positioning and correcting the CD column body part of the automobile, and the width of the C column body part of the automobile and the D column body part of the automobile does not exceed the straight-line distance between the two circulation racks (20); The turning assembly comprises two mounting plates (24) mounted in parallel on the circulation frame (20), wherein the upper end of the mounting plates (24) is provided with a bracket (21) which rotates twice inside the circulation frame (20); The lower surface of the bracket (21) is provided with a counter groove (33), and the surface of the bracket (21) is penetrated by a hollow groove (32) for the welding unit (19) to enter for welding, and the hollow groove (32) is communicated with the counter groove (33); The second clamp unit (31) and the third clamp unit (34) are respectively arranged on a side surface of the bracket (21) and are used to position and clamp the C-pillar body part and the D-pillar body part of the automobile respectively; During one rotation, the bracket (21) rotates 90 degrees clockwise, changing from an initial vertical state to a horizontal state, and welding the front of the connection between the CD column and the body of the automobile; During the second rotation, the bracket (21) rotates 180 degrees counterclockwise to weld the reverse side of the connection between the CD column and the vehicle body; When welding the front and back sides, the welding sequence is from the middle to the edge, that is, the middle part of the connection between the car CD pillar and the body parts is welded first, and then the edges are welded step by step. Since the welding of the middle part is completed, the relatively cool area will serve as a cooling support, avoiding excessive heat during edge welding that affects the shrinkage of the edge part, making the heat at the connection between the car CD pillar and the body parts evenly distributed, reducing the temperature difference in the welding area.

2. The intelligent positioning welding system for automobile CD column body parts according to claim 1 is characterized in that: The lower clamping jaw is slidably mounted on the groove (33); an electric push rod 3 (28) is mounted on an extension plate on the upper surface of the bracket (21); a pushing end of the electric push rod 3 (28) is connected to a connecting rod (29); a U-shaped end of the connecting rod (29) slides on the bracket (21); and an upper clamping jaw is slidably mounted on the U-shaped end of the connecting rod (29) and is perpendicular to the sliding direction of the connecting rod (29).

3. The intelligent positioning welding system for automobile CD column body parts according to claim 2 is characterized in that: A driving shaft (27) driven by a rotating motor is provided at the connection between the bracket (21) and the mounting plate (24), a rail groove (25) is provided on the inner wall surface of each mounting plate (24), and an arc rod (26) slidably plugged into the corresponding rail groove (25) is installed on the other side of the bracket (21).

4. The intelligent positioning welding system for automobile CD column body parts according to claim 3 is characterized in that: A vacant portion is provided on one side surface of each moving box (2), a side plate (4) is slidably provided in the vacant portion, an insertion opening (8) is provided on the upper portion of the side plate (4), and a stable clamping unit corresponding to the CD column body part of the automobile is provided inside the side plate (4), an electric push rod (6) is installed on the outer surface of the moving box (2), a connecting plate (5) is installed at the pushing end of the electric push rod (6), and the end surface of the connecting plate (5) is fixed to the side plate (4); Movable rails (7) are provided on both sides of the welding box (1), and the movable rails (7) are slidably arranged with the movable box (2) and the side plate (4) on the same side.

5. The intelligent positioning welding system for automobile CD column body parts according to claim 4 is characterized in that: The stable clamping unit comprises a material placing rack (9), the upper surface of which is slidably provided with a bearing seat (10) which moves toward the flip assembly in the welding box (1), the middle part of the upper surface of which is provided with an entry groove (12) for the C-pillar body part or the D-pillar body part of the automobile to pass through, and a clamp unit (11) for clamping the C-pillar body part or the D-pillar body part of the automobile is installed on the surface of the bearing seat (10); The entry groove (12) and the counter groove (33) are arranged at the same height and flush with each other.

6. The intelligent positioning welding system for automobile CD column body parts according to claim 5 is characterized in that: The push seal assembly comprises a plurality of accommodating cavities (16) arranged on the inner wall surface of the corresponding side moving box (2), a slide rod is installed inside each of the accommodating cavities (16), a contact frame (17) pushed by an external force is sleeved on the slide rod, and a spring is sleeved on the outside of the slide rod, two sealing plates (18) are arranged on the surface of the contact frame (17), and the end surface of the sealing plate (18) is provided with a strip groove (23) for the circulation frame (20) to pass through, and the end surfaces of the sealing plates (18) on both sides are in close contact.

7. The intelligent positioning welding system for automobile CD column body parts according to claim 6 is characterized in that: A driving chamber (13) communicating with the accommodating chamber (16) is provided inside the moving box (2). A rotating rod (14) is rotatably mounted inside the driving chamber (13). A plurality of cams (15) are fixedly mounted on the rotating rod (14). The cams (15) are always in contact with rollers on corresponding contact racks (17).

8. The intelligent positioning welding system for automobile CD column body parts according to claim 7 is characterized in that: A discharge channel is provided at the end of the upper surface of the welding box (1), a discharge door (3) is slidably provided in the discharge channel, and a laser sensor is embedded and installed on the lower surface of the discharge door (3).

9. The working method of the intelligent positioning welding system of the automobile CD column body part according to claim 8 is characterized in that: The working method comprises the following steps: Step 1: First, the moving boxes (2) on both sides are kept in contact with the welding box (1), the side panels (4) on the corresponding sides are slid open, and the C-pillar body parts and the D-pillar body parts of the automobile are respectively installed into the stable clamping units in the side panels (4) through the insertion openings (8); Step 2: Afterwards, the stable clamping unit pushes the automobile C-pillar body part and the automobile D-pillar body part in the bearing seat (10) to move synchronously toward the flip assembly, and the automobile C-pillar body part and the automobile D-pillar body part enter the groove (33) from two directions until their end faces are aligned and fitted, and the clamping unit 2 (31) and the clamping unit 3 (34) respectively perform adaptive positioning according to the thickness of the automobile C-pillar body part and the automobile D-pillar body part; Step 3, the support seat (21) rotates 90 degrees clockwise and follows the transmission of the circulation frame (20) to enter different welding sealing chambers, and the upper welding unit (19) welds the front side of the connection between the CD column and the body part of the automobile; when the circulation frame (20) rotates to the lower position, the support seat (21) rotates 180 degrees counterclockwise, and the lower welding unit (19) welds the reverse side of the connection between the CD column and the body part of the automobile.

Images