Flexible fixture for tailor welding of automobile thermal forming door ring and welding process

Abstract

The invention discloses an automobile thermal forming door ring tailor-welding flexible clamp and a welding process, the flexible clamp comprises a base plate, a suction positioning mechanism, a side positioning pin module and an auxiliary supporting piece, and the suction positioning mechanism, the side positioning pin module and the auxiliary supporting piece are detachably mounted on the base plate full of array hole sites; the specific number and positions of the suction positioning mechanisms, the side positioning pin modules and the auxiliary supporting pieces can be adjusted according to needs, telescopic front positioning pin assemblies and electromagnet sets are adopted in the suction positioning mechanisms, and the side positioning pin modules are positioning pin mechanisms capable of being adjusted in three directions. The flexible clamp is adopted for positioning and feeding during tailor-welding of the automobile thermal forming door ring, the number of used stamping dies can be effectively reduced, lap joint edges are eliminated, the utilization rate of materials is improved to the maximum extent, the number and the positions of all assemblies on the base plate can be adjusted according to needs in the using process, the adjusting process is simple, consumed time is short, and the production efficiency is improved. And the application range of the flexible clamp can be effectively expanded.

Description

Technical Field

[0001] The invention relates to the field of welding, and in particular to a flexible fixture for welding a thermoformed door ring for an automobile and a welding process. Background Art

[0002] The car door knocker is a very important part of the car body. It is crucial to emphasize it and is the decisive part for the car's collision performance. Its manufacturing process is also the focus of attention in the car body production process. There are currently two common methods for doing this on cars.

[0003] The first method is to use a large plate that is slightly larger than the size of the car door ring after it is unfolded, and then directly blank it into the shape of the door ring through stamping or laser cutting, and then stamp it as a whole. This method is simple and reliable, but the waste of materials is obvious, and it is also impossible to change the strength of the door ring according to the design requirements, such as the strength of the upper A-pillar position reaches 2000MPA, and the strength of the lower side beam position is 1200MPA.

[0004] The second common method is to first cut and cut each component of the door knocker separately, then use the hot stamping process to form them separately, and finally overlap and weld them to form the car door knocker. This process still has a certain waste in material utilization due to the overlapped parts, and increases the weight of the car body.

[0005] Based on the shortcomings of the above-mentioned existing door ring production process, a flexible fixture and welding process for automobile thermoforming door ring welding are designed. Summary of the invention

[0006] The purpose of the present invention is to provide a flexible fixture and welding process for hot-formed door rings for automobiles, so as to solve one or more of the above-mentioned problems in the prior art.

[0007] The present invention provides a flexible fixture for welding a thermoformed door ring for an automobile, comprising a base plate, a suction and positioning mechanism, a side positioning pin module and an auxiliary support member, wherein the suction and positioning mechanism, the side positioning pin module and the auxiliary support member are all installed on the base plate. The suction and positioning mechanism includes a bracket, a front positioning pin assembly and a suction member group, the top of the bracket is provided with a suction member group, the front positioning pin assembly includes a front positioning pin and a telescopic mechanism, and the bracket is connected to the front positioning pin through the telescopic mechanism; The side positioning pin module is a positioning pin mechanism that can be adjusted in three directions; The upper surfaces of the suction and positioning mechanism, the side positioning pin module and the auxiliary support member are all arranged correspondingly.

[0008] In some embodiments, the automotive thermoformed door ring tailor-welding flexible fixture is used to fix a plurality of tailor-welded plates corresponding to the door ring.

[0009] In some embodiments, A plurality of holes are provided on the substrate, and the plurality of holes are arranged in an array; The suction and positioning mechanism, the side positioning pin module and the auxiliary support member are detachably connected to the base plate.

[0010] In some embodiments, the auxiliary support includes a brush table and / or a support column.

[0011] In some embodiments, The clamping member group is an electromagnet group; The suction and positioning mechanism also includes a positioning pin protection mechanism and a dust suction port. A dust suction port is installed on the side of the suction and positioning member group. The dust suction port is connected to the smoke extraction and dust removal equipment through a pipe. The positioning pin protection mechanism is arranged corresponding to the front positioning pin assembly. The positioning pin protection mechanism includes an auxiliary telescopic mechanism and a protective cover. The protective cover is connected to the bracket through the auxiliary telescopic mechanism.

[0012] In some embodiments, the suction and positioning mechanism further includes a positioning scale, and the positioning scale is installed on the outer side wall of the bracket below the suction component group.

[0013] In some embodiments, the side positioning pin module includes a base, a three-way adjustment mechanism, and a side positioning pin column, and the side positioning pin column is arranged on the base through the three-way adjustment mechanism.

[0014] A welding process comprises the following steps: S1, cutting blanks to form tailor-welded plates; S2, positioning the material, using any of the above-mentioned automotive thermoformed door ring tailor-welded flexible fixtures to position and clamp the tailor-welded plates; S3, welding to form an integrated door knocker; S4, hot stamping; S5. Cutting.

[0015] In some embodiments, the specific process of loading and positioning includes the following steps: Adjust the position of the suction and positioning mechanism, side positioning pin module and auxiliary support parts in the flexible fixture for welding the hot-formed door ring of the automobile on the base plate as needed and fix them; Loading, load the welded plates in sequence as needed, load one welded plate, start the corresponding front locating pin assembly, use the front locating pin in the front locating pin assembly for positioning, then the corresponding suction and clamping assembly works to clamp the welded plate, and then load the next plate, and repeat the cycle in sequence to complete the loading and positioning of all welded plates.

[0016] In some embodiments, S1 uses laser cutting in the cutting and blanking process; The S5 uses laser 3D cutting during its cutting process.

[0017] The advantages of the flexible fixture for welding automobile thermoformed door rings and the welding process described in the present invention are: The positions of the components on the substrate can be adjusted as needed to meet the positioning requirements of a variety of products, and the adjustment process is simple and time-saving; The number and position of each component on the substrate can be adjusted as needed to meet the safety requirements of different strengths at different locations; The application of the above-mentioned automotive thermoformed door ring welding flexible fixture can effectively reduce the number of stamping dies used, optimize the process flow, eliminate overlapping edges, and effectively improve the utilization rate of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A top view of a flexible fixture for welding a thermoformed door ring for an automobile in some embodiments of the present invention; Figure 2 It is a structural schematic diagram of the application of the flexible fixture for welding automobile thermoforming door rings in some embodiments of the present invention; Figure 3 It is a structural schematic diagram of an adjustable side positioning pin module in some embodiments of the present invention; Figure 4 It is a structural schematic diagram of the main perspective of the suction and positioning mechanism in some embodiments of the present invention; Figure 5 It is a schematic structural diagram of a side view of a suction and positioning mechanism in some embodiments of the present invention; Figure 6 It is a schematic diagram of the structure of the suction and positioning mechanism in some embodiments of the present invention. DETAILED DESCRIPTION

[0019] Combination Figures 1 to 6 As shown in the content, in this embodiment, a flexible clamp for welding automotive thermoformed door rings is proposed, including a substrate 1, and a plurality of suction and positioning mechanisms, side positioning pin modules and auxiliary support members arranged on the substrate 1. The suction and positioning mechanisms, side positioning pin modules and auxiliary support members can be detachably connected to the substrate 1 by one or more connecting members such as bolts, and the upper surfaces of the suction and positioning mechanisms, side positioning pin modules and auxiliary support members are correspondingly arranged.

[0020] The substrate 1 is provided with a plurality of holes 101, which can be set as required or directly Figure 1 and Figure 2 The contents shown are arranged in an array, and the suction positioning mechanism, the side positioning pin module and the auxiliary support member can be connected to the substrate 1 through the hole 101.

[0021] In some specific implementations, a number of supporting feet 102 can be set at the bottom of the substrate 1. The height of the substrate 1 can be raised by the supporting feet 102 to facilitate the disassembly and installation of the suction and positioning mechanism, the side positioning pin module and the auxiliary support parts. At the same time, it can effectively avoid the influence of the connecting parts between the suction and positioning mechanism, the side positioning pin module and the auxiliary support parts and the substrate 1 on the stability of the substrate 1 when it is placed.

[0022] The suction and positioning mechanism, the side positioning pin module and the auxiliary support are set corresponding to the tailored welded blank. The positioning of each tailored welded blank requires at least three contact points, or one contact point and one contact line, to ensure the accuracy of the positioning of each tailored welded blank. The number and setting position of the suction and positioning mechanism, the side positioning pin module and the auxiliary support on the substrate 1 can be adjusted and fixed as needed. The suction positioning mechanism and the side positioning pin module are set on the side of the tailor-welded plate corresponding to the side to be welded; The auxiliary support members are distributed at the bottom of each tailored welded plate and are used to hold the tailored welded plate, provide effective support for the tailored welded plate, and ensure the stability of the tailored welded plate during welding.

[0023] The auxiliary support may be a brush stand and / or a support column 5 .

[0024] The side positioning pin module can be a positioning pin mechanism that can be adjusted in three directions, such as: the side positioning pin module is as follows Figure 3 The structure shown includes a base 411, a reinforcing block 412, a three-way adjustment mechanism 413, and a side positioning pin 414. The base 411 is connected to the substrate 1. The side positioning pin 414 is connected to the base 411 through the three-way adjustment mechanism 413. The bottom of the reinforcing block 412 is connected to the substrate 1. One side end of the reinforcing block 412 is arranged above the base 411, and the bottom surface of the side end of the reinforcing block 412 is in contact with the base 411. The side positioning pin module can be manually adjusted in space, which is simple and practical.

[0025] Combination Figures 4 to 6 The structure of the suction and positioning mechanism can be as follows: it includes a bracket 211, a front positioning pin assembly and a suction member group. A suction member group 213 is provided on the top of the bracket 211. The front positioning pin assembly includes a front positioning pin 214 and a telescopic mechanism 215. The bracket 211 is connected to the front positioning pin 214 through the telescopic mechanism 215. The suction member group 213 can be an electromagnet group. In addition, the suction and positioning mechanism can also be equipped with one or more of a positioning pin protection mechanism, a dust suction port 216 and a positioning scale 219, wherein The positioning pin protection mechanism is arranged corresponding to the front positioning pin assembly, and the positioning pin protection mechanism includes an auxiliary telescopic mechanism 220 and a protection cover 217, and the protection cover 219 is connected to the bracket 211 through the auxiliary telescopic mechanism 220; The dust suction port 216 is sucked tightly to the side of the suction member group 213, and the dust suction port 216 is connected to the smoke extraction and dust removal equipment through a pipeline, so as to effectively purify the welding smoke during welding; The positioning scale 219 is installed on the outer side wall of the bracket 211 below the suction member assembly 213 .

[0026] In some specific implementations, the telescopic end on the telescopic mechanism 215 is connected to the front positioning pin 214 through a connecting seat, a slide rail can be added to the back of the connecting seat through a slide rail mounting seat 218, and a slide groove compatible with the slide rail can be added at the corresponding position on the bracket 211. The stability of the front positioning pin 214 during movement is enhanced by the setting of the slide rail and the slide groove.

[0027] In some specific implementations, a plurality of reinforcement members 212 are added to the bracket 211 . The reinforcement members 212 may be triangular in shape. The arrangement of the reinforcement members 212 enhances the structural stability of the bracket 211 .

[0028] The telescopic mechanism 215 and the auxiliary telescopic mechanism 220 mentioned above can both be cylinders connected to a bidirectional air pump.

[0029] Combination Figure 1 and Figure 2 The specific configuration structure of the suction and positioning mechanism, the side positioning pin module and the auxiliary support member on the substrate 1 can be as follows: Substrate 1 according to Figure 1 and Figure 2 The installation positions shown are set in order Seven suction and positioning mechanisms, namely a first suction and positioning mechanism 201, a second suction and positioning mechanism 202, a third suction and positioning mechanism 203, a fourth suction and positioning mechanism 204, a fifth suction and positioning mechanism 205, a sixth suction and positioning mechanism 206, and a seventh suction and positioning mechanism 207; Four side positioning pin modules, namely a first side positioning pin module 401, a second side positioning pin module 402, a third side positioning pin module 403, and a fourth side positioning pin module 404; Nine brush stations, namely a first brush station 301, a second brush station 302, a third brush station 303, a fourth brush station 304, a fifth brush station 305, a sixth brush station 306, a seventh brush station 307, an eighth brush station 308, and a ninth brush station 309; The eight support columns are respectively a first support column 501 , a second support column 502 , a third support column 503 , a fourth support column 504 , a fifth support column 505 , a sixth support column 506 , a seventh support column 507 , and an eighth support column 508 .

[0030] The above-mentioned automobile thermoforming door ring welding flexible fixture is used to weld the automobile thermoforming door ring, and the number and position of the suction and positioning mechanism, the side positioning pin module and the auxiliary support member on the substrate in the automobile thermoforming door ring welding flexible fixture are adjusted according to the welding door ring product drawing, and fixed. The specific welding process of the welding includes the following steps: S1. Cut the blanks to form tailor-welded plates. Laser cutting can be used in this process. S2, loading and positioning, loading the tailor-welded plates in sequence as needed, wherein the loading process of the first plate is described in detail, the corresponding front positioning pin is acted upon by the telescopic mechanism, and the up and down movement is realized by the slide rail slider, first the corresponding front positioning pin rises, and the first plate is placed, and the positioning is realized by two sets of front positioning pin assemblies, and then the first plate is contacted by the electromagnet and tightly attracted by magnetism. The front positioning pin descends, and the protective cover corresponding to the front positioning pin moves horizontally and covers the front positioning pin to prevent damage to the back by splashing during subsequent welding, and realizes the function of receiving welding slag. Then the second plate is placed, and the second plate is positioned by the welding edge of the first plate and the corresponding side positioning pin module, and then it is tightly attracted by magnetism by the electromagnet it contacts, and the loading and positioning process of the second plate is repeated in sequence, and finally the loading and positioning of all plates is realized; S3, welding to form an integrated door knocker; S4, hot stamping; S5, cutting, in which three-dimensional laser cutting is used to form a corresponding door knocker.

[0031] The above-mentioned automotive thermoformed door ring welding flexible clamp can be used to position and load multiple welded plates corresponding to the door ring, and can also be used in other welding processes. It only needs to adjust the number and position of the suction positioning mechanism, side positioning pin module and auxiliary support parts on the substrate 1 according to the requirements of the flat welding plate.

[0032] The above undisclosed matters can all be implemented using existing technologies, so they will not be elaborated here.

[0033] For ordinary technicians, several similar variations and improvements can be made without departing from the creative concept of the present invention, and these should also be regarded as the protection scope of the present invention.

Claims

1. A flexible fixture for welding automobile thermoformed door rings, characterized in that: It includes a base plate, a suction and positioning mechanism, a side positioning pin module and an auxiliary support member, wherein the suction and positioning mechanism, the side positioning pin module and the auxiliary support member are all installed on the base plate. The suction and positioning mechanism includes a bracket, a front positioning pin assembly and a suction member group, the top of the bracket is provided with a suction member group, the front positioning pin assembly includes a front positioning pin and a telescopic mechanism, and the bracket is connected to the front positioning pin through the telescopic mechanism; The side positioning pin module is a positioning pin mechanism that can be adjusted in three directions; The upper surfaces of the suction and positioning mechanism, the side positioning pin module and the auxiliary support member are all arranged correspondingly.

2. The automotive thermoforming door ring tailor-welding flexible fixture according to claim 1, wherein: The automobile thermoforming door ring tailor-welding flexible fixture is used for fixing a plurality of tailor-welded plates corresponding to the door ring.

3. The automotive thermoforming door ring tailor-welding flexible fixture according to claim 2, wherein: A plurality of holes are provided on the substrate, and the plurality of holes are arranged in an array; The suction and positioning mechanism, the side positioning pin module and the auxiliary support member are detachably connected to the base plate.

4. The automotive thermoforming door ring tailor-welding flexible fixture according to claim 3, wherein: The auxiliary support member includes a brush stand and / or a support column.

5. The automotive thermoforming door ring tailor-welding flexible fixture according to claim 3, wherein: The clamping member group is an electromagnet group; The suction and positioning mechanism also includes a positioning pin protection mechanism and a dust suction port. A dust suction port is installed on the side of the suction and positioning member group. The dust suction port is connected to the smoke extraction and dust removal equipment through a pipe. The positioning pin protection mechanism is arranged corresponding to the front positioning pin assembly. The positioning pin protection mechanism includes an auxiliary telescopic mechanism and a protective cover. The protective cover is connected to the bracket through the auxiliary telescopic mechanism.

6. The automotive thermoforming door ring tailor-welding flexible fixture according to claim 5, wherein: The suction and positioning mechanism also includes a positioning scale, and the positioning scale is installed on the outer side wall of the bracket below the suction and positioning component group.

7. The automotive thermoforming door ring tailor-welding flexible fixture according to claim 1, wherein: The side positioning pin module comprises a base, a three-way adjustment mechanism and a side positioning pin column, and the side positioning pin column is arranged on the base through the three-way adjustment mechanism.

8. A welding process, characterized in that: The steps include: S1, cutting blanks to form tailor-welded plates; S2, positioning the material, using the automotive thermoforming door ring tailor-welding flexible fixture described in any one of 1-7 above to position and clamp the tailor-welded plate; S3, welding to form an integrated door knocker; S4, hot stamping; S5. Cutting.

9. The welding process according to claim 8, wherein: The specific process of loading and positioning includes the following steps: Adjust the position of the suction and positioning mechanism, side positioning pin module and auxiliary support parts in the flexible fixture for welding the hot-formed door ring of the automobile on the base plate as needed and fix them; Loading, load the welded plates in sequence as needed, load one welded plate, start the corresponding front locating pin assembly, use the front locating pin in the front locating pin assembly for positioning, then the corresponding suction and clamping assembly works to clamp the welded plate, and then load the next plate, and repeat the cycle in sequence to complete the loading and positioning of all welded plates.

10. The welding process according to claim 8, wherein: S1 uses laser cutting in the cutting and blanking process; The S5 uses laser 3D cutting during its cutting process.

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