Door ring welding clamp device capable of being quickly remodeled

Abstract

The utility model relates to a door ring welding fixture device capable of being quickly remodeled, which comprises a base, a clamping unit and a positioning unit which are matched with each other are mounted at the top of the base in a matched manner, a workpiece is positioned through the positioning unit, and the workpiece is clamped and fixed through the clamping unit; the clamping unit comprises a plurality of electromagnetic clamping mechanisms, each electromagnetic clamping mechanism attracts a workpiece in an electromagnetic mode, and a first magnetic base used for being matched with the base in a quick release mode is arranged in each electromagnetic clamping mechanism. The positioning unit comprises a plurality of positioning pin mechanisms, and a third magnetic base used for being matched with the base in a quick release mode is arranged in each positioning pin mechanism. By arranging the clamping unit and the positioning unit, the compatibility of the clamp device can be improved, and the production cost is reduced; meanwhile, by arranging the magnetic base, corresponding parts can be quickly disassembled and assembled, so that the replacement time is shortened, the labor cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile door ring manufacturing, in particular to a door ring welding fixture device capable of rapid shape change. Background Art

[0002] Automobile door knockers are made by welding together several door knocker plates. Before laser welding, the plates need to be positioned to form the rough door knocker shape, facilitating subsequent automated welding using the laser welding machine. The accuracy of the welded plates' positioning directly impacts the subsequent weld quality of the door knocker.

[0003] Prior to welding automotive door knockers, a specialized fixture is typically used to clamp the steel plate to a workbench. This fixture's design takes into account the door knocker's shape, size, and welding requirements to ensure the steel plate doesn't move or deform during the welding process. However, switching between door knockers requires simultaneous fixture replacement, increasing production costs. Furthermore, fixture replacement requires disassembly and assembly of numerous components, consuming significant time and labor costs, and impacting production efficiency. Utility Model Content

[0004] In response to the shortcomings of the above-mentioned existing production technology, the applicant provides a door ring welding fixture device that can be quickly changed. By setting a clamping unit and a positioning unit, the compatibility of the fixture device can be improved and the production cost can be reduced. At the same time, by setting a magnetic base, the corresponding components can be quickly disassembled and assembled, thereby reducing replacement time, reducing labor costs and improving production efficiency.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] A door ring welding fixture device with quick changeover capability comprises a base, wherein a clamping unit and a positioning unit are mounted on the top of the base, the positioning unit is used to position the workpiece, and the clamping unit is used to clamp and fix the workpiece;

[0007] The clamping unit includes a plurality of electromagnetic clamping mechanisms, each of which adopts an electromagnetic method to absorb the workpiece, and a first magnetic seat for quick release with the base is provided in the single electromagnetic clamping mechanism;

[0008] The positioning unit includes a plurality of positioning pin mechanisms, and a third magnetic seat for quick release cooperation with the base is provided in each positioning pin mechanism;

[0009] The arrangement position of the corresponding electromagnetic clamping mechanism on the base is adjusted by the first magnetic seat, and the arrangement position of the corresponding positioning pin mechanism on the base is adjusted by the third magnetic seat, so that the clamping unit and the positioning unit are compatible with workpieces of different types.

[0010] As a further improvement of the above technical solution:

[0011] A positioning mechanism is further installed on the top of the base. The positioning mechanism comprises a positioning bracket, a first positioning plate is installed on the top of the positioning bracket, and a plurality of first positioning grooves are provided on the edge of the first positioning plate. The first positioning grooves are used to locate the arrangement position of the electromagnetic clamping mechanism.

[0012] A second positioning plate is detachably mounted on the first positioning plate, and a plurality of second positioning grooves for positioning the positioning pin mechanism are formed on an edge of the second positioning plate.

[0013] A plurality of inner positioning pins are mounted on the top end surface of the first positioning plate, and the inner positioning pins correspond to the inner contour of the workpiece, thereby positioning the workpiece.

[0014] The first positioning plate and the second positioning plate are detachably mounted via connecting pins.

[0015] An avoidance groove is provided in the single first positioning groove.

[0016] The structure of a single electromagnetic clamping mechanism is as follows: it includes a first support seat, which is installed in conjunction with the base through several first magnetic seats. An electromagnet assembly is installed on the top of the first support seat, and the electromagnet assembly is energized and magnetized to adsorb the workpiece.

[0017] The single-group electromagnet assembly comprises a first electromagnet and a second electromagnet arranged at intervals. The first electromagnet attracts one steel plate of the workpiece, and the second electromagnet attracts another steel plate of the workpiece.

[0018] The top of the base is also equipped with several auxiliary support mechanisms, which are used to support the workpiece. The structure of a single auxiliary support mechanism is as follows: it includes a second support seat, which is installed in cooperation with the base through a second magnetic seat, and a support plate for supporting the workpiece is fixed on the top of the second support seat.

[0019] The structure of a single locating pin mechanism is as follows: it includes a mounting plate, at least one third magnetic seat is installed on the bottom of the mounting plate, the mounting plate is installed with the base through the third magnetic seat, and an external locating pin is installed on the top of the mounting plate through a support column. The locating pin mechanism locates the outer contour of the first steel plate in the workpiece through the external locating pin.

[0020] Several feeler gauges are placed on the top of the base.

[0021] The beneficial effects of the utility model are as follows:

[0022] The utility model has a compact and reasonable structure and is easy to operate. By arranging the clamping unit and the positioning unit, based on the standardization and modular design concept, it can achieve rapid changeover, meet the flexible design of the clamping device, and can efficiently complete welding work with different process requirements. It is safe, reliable, high-precision and good-quality. At the same time, by arranging the positioning mechanism, the arrangement position of the electromagnetic clamping mechanism and the positioning pin mechanism can be accurately positioned for workpieces of different versions, thereby improving the compatibility of the clamping device and reducing production costs.

[0023] The utility model also has the following advantages:

[0024] (1) In the present invention, by providing a magnetic seat, rapid disassembly and assembly between the electromagnetic clamping mechanism and the base, between the auxiliary support mechanism and the base, and between the positioning pin mechanism and the base can be achieved, thereby realizing a flexible design of the clamp device, so that the corresponding mechanism can be fixed at any position of the base, and the clamp device can be compatible with any door ring version whose size is smaller than the base table.

[0025] (2) The present invention provides an auxiliary support mechanism to support the portion of the workpiece that is suspended outside the electromagnetic clamping mechanism, thereby ensuring that the workpiece will not be twisted and drooped due to the action of gravity; at the same time, the internal support plate is made of nylon, and the support surface of the support plate is flat, which can prevent the workpiece from being scratched.

[0026] (3) In the present invention, by providing a first positioning plate and a first positioning groove, the arrangement position of the electromagnetic clamping mechanism can be positioned for the workpiece of the corresponding version, so that the light-transmitting gap between the two electromagnets in each electromagnetic clamping mechanism corresponds one-to-one to each weld seam on the workpiece.

[0027] (4) In the present invention, by providing a second positioning plate and a second positioning groove, the arrangement position of the positioning pin mechanism can be positioned for the workpiece of the corresponding version, so that the positioning pin mechanism can position the placement position of the first steel plate in the workpiece.

[0028] (5) In the present invention, by providing a positioning pin mechanism and an internal positioning pin, the consistency and repeatability of the position of the workpiece on the fixture device can be ensured, thereby improving welding efficiency and welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural diagram of the present utility model.

[0030] Figure 2 for Figure 1 Top view of .

[0031] Figure 3 It is a structural schematic diagram of the electromagnetic clamping mechanism in the utility model.

[0032] Figure 4 It is a structural schematic diagram of the auxiliary support mechanism in the utility model.

[0033] Figure 5 It is a structural diagram of the positioning mechanism in the utility model.

[0034] Figure 6 It is a structural schematic diagram of the positioning pin mechanism in the utility model.

[0035] Figure 7 This is a schematic diagram of the utility model in working state.

[0036] Among them: 1. Base; 2. Electromagnetic clamping mechanism; 3. Auxiliary support mechanism; 4. Feeler gauge; 5. Positioning mechanism; 6. Positioning pin mechanism; 7. Workpiece;

[0037] 201, first magnetic base; 202, first support base; 203, first electromagnet; 204, second electromagnet; 205, dust collection box;

[0038] 301, second magnetic base; 302, second support base; 303, support plate;

[0039] 501, first positioning plate; 502, second positioning plate; 503, positioning bracket; 504, connecting pin; 505, inner positioning pin; 506, first positioning slot; 507, second positioning slot;

[0040] 601. Third magnetic base; 602. Mounting plate; 603. Handle; 604. Support column; 605. External positioning pin. DETAILED DESCRIPTION

[0041] The specific implementation of the present utility model will be described below with reference to the accompanying drawings.

[0042] The structure and functions of this utility model are as follows:

[0043] like Figure 1-Figure 7As shown, a door ring welding fixture device with rapid changeover includes a base 1, and a clamping unit and a positioning unit that cooperate with each other are installed on the top of the base 1. The workpiece 7 is positioned by the positioning unit, and the workpiece 7 is clamped and fixed by the clamping unit; the clamping unit includes several electromagnetic clamping mechanisms 2, and a single electromagnetic clamping mechanism 2 adopts an electromagnetic method to adsorb the workpiece 7, and a single electromagnetic clamping mechanism 2 is provided with a first magnetic seat 201 for quick-release cooperation with the base 1; the positioning unit includes several positioning pin mechanisms 6, and a single positioning pin mechanism 6 is provided with a third magnetic seat 601 for quick-release cooperation with the base 1; the arrangement position of the corresponding electromagnetic clamping mechanism 2 on the base 1 is adjusted by the first magnetic seat 201, and the arrangement position of the corresponding positioning pin mechanism 6 on the base 1 is adjusted by the third magnetic seat 601, so that the clamping unit and the positioning unit are compatible with workpieces 7 of different versions. By setting up a clamping unit and a positioning unit, which are installed on the base based on a quick-release method, the compatibility of the clamp device can be improved, the production cost can be reduced, the layout of the clamp device can be quickly replaced, the labor cost can be reduced, and the production efficiency can be improved.

[0044] The base 1 serves as a mounting carrier for the fixture device, is used to carry other components in the fixture device, and is used to realize functions such as air source connection, power supply connection, circuit layout, and dust removal.

[0045] like Figure 3 As shown, the structure of a single electromagnetic clamping mechanism 2 is as follows: it includes a first support base 202, which is mounted on the base 1 through a plurality of first magnetic bases 201. The top of the first support base 202 is mounted with an electromagnet assembly, which is energized and magnetized to attract the workpiece 7. The electromagnetic clamping mechanism 2 is used to support the workpiece 7 and to attract and fix the workpiece 7 when the workpiece 7 is welded, so as to ensure that the welded butt-welded plate surfaces in the workpiece 7 are flush and ensure the welding quality.

[0046] By providing the first magnetic base 201, quick disassembly and assembly between the corresponding clamping mechanism 2 and the base 1 can be achieved. The first magnetic base 201 adopts a manual knob type. When the electromagnetic clamping mechanism 2 is working normally, the first magnetic base 201 is adsorbed and fixed to the top of the base 1; when the door knocker version is changed, the position of the electromagnetic clamping mechanism 2 needs to be moved. At this time, the knob on the first magnetic base 201 is manually rotated to demagnetize it. After moving to the new position, the button is manually rotated to make it adsorbed to the base 1 again;

[0047] The single-group electromagnet assembly includes a first electromagnet 203 and a second electromagnet 204 arranged at intervals. The first electromagnet 203 adsorbs one steel plate of the workpiece 7, and the second electromagnet 204 adsorbs another steel plate of the workpiece 7; the bottom of the single-group electromagnet assembly is also equipped with a dust collecting box for collecting welding slag that falls into the gap between the first electromagnet 203 and the second electromagnet 204.

[0048] Several auxiliary support mechanisms 3 are also installed on the top of the base 1. The auxiliary support mechanisms 3 are used to support the workpiece 7. Figure 4 As shown, the structure of a single auxiliary support mechanism 3 is as follows: it includes a second support base 302, which is mounted on the base 1 via a second magnetic base 301. A support plate 303 for supporting the workpiece 7 is fixed to the top of the second support base 302. The provision of the second magnetic base 301 enables quick assembly and disassembly between the corresponding auxiliary support mechanism 3 and the base 1; the support plate 303 is made of nylon and has a flat support surface to prevent scratching the workpiece 7; the provision of the auxiliary support mechanism 3 can support the portion of the workpiece 7 that overhangs the electromagnetic clamping mechanism 2, ensuring that the workpiece 7 does not twist or sag due to gravity.

[0049] The top of the base 1 is also equipped with a positioning mechanism 5, which is used to locate the layout position of the electromagnetic clamping mechanism 2, so that the layout position of the electromagnetic clamping mechanism 2 corresponds to the position of each weld in the workpiece 7. The positioning mechanism 5 is also used to locate the layout position of the positioning pin mechanism 6, so that the positioning pin mechanism 6 corresponds to the outline of the workpiece 7, and then the placement position of the workpiece 7 is positioned by the positioning pin mechanism 6; in addition, the positioning mechanism 5 can also directly locate the placement position of the workpiece 7. By setting the positioning mechanism 5, the layout positions of the electromagnetic clamping mechanism 2 and the positioning pin mechanism 6 can be located, thereby improving the flexibility of the clamping device, reducing production costs, and improving production efficiency; the placement position of the steel plate in the workpiece 7 is accurately positioned by the positioning pin mechanism 6, which can improve the quality of subsequent welding.

[0050] like Figure 5 As shown, the structure of the positioning mechanism 5 is as follows: it includes a positioning bracket 503, a first positioning plate 501 is installed on the top of the positioning bracket 503, and a plurality of first positioning slots 506 are provided on the edge of the first positioning plate 501, and the first positioning slots 506 are used to locate the layout position of the electromagnetic clamping mechanism 2; a second positioning plate 502 is detachably installed on the first positioning plate 501, and a plurality of second positioning slots 507 are provided on the edge of the second positioning plate 502 for positioning the positioning pin mechanism 6; a plurality of inner positioning pins 505 are installed on the top end face of the first positioning plate 501, and the inner positioning pins 505 correspond to the inner contour of the workpiece 7, thereby positioning the workpiece 7. In the present utility model, the shapes of the first positioning plate 501 and the second positioning plate 502 are designed according to the type of the workpiece 7 to be processed, as well as the position and number of the first positioning slots 506 on the first positioning plate 501, and the position and number of the second positioning slots 507 on the second positioning plate 502;

[0051] By providing the first positioning plate 501 and the first positioning groove 506, the electromagnetic clamping mechanism 1 can be positioned for the corresponding workpiece 7, so that the light-transmitting gap between the two electromagnets in each electromagnetic clamping mechanism 1 corresponds to each weld seam on the workpiece 7.

[0052] By providing the second positioning plate 502 and the second positioning groove 506 , the positioning pin mechanism 6 can be positioned for the workpiece 7 of the corresponding type, so that the positioning pin mechanism 6 can position the first steel plate in the workpiece 7 ;

[0053] By providing the inner positioning pin 505 , in conjunction with the first steel plate positioned by the positioning pin mechanism 6 , the placement positions of the remaining steel plates in the workpiece 7 can be positioned.

[0054] A single first positioning groove 506 is provided with an avoidance groove. The first positioning groove 506 is a right-angled notch. The avoidance groove can prevent the electromagnet assembly 203 from being damaged by collision when the electromagnetic clamping mechanism 2 is positioned.

[0055] The first positioning plate 501 and the second positioning plate 502 are detachably mounted via a connecting pin 504 to prevent the second positioning plate 502 from interfering with subsequent placement of the workpiece 7 and welding of the placed workpiece 7.

[0056] like Figure 6 As shown, the structure of a single locating pin mechanism 6 is as follows: it includes a mounting plate 602, at least one third magnetic base 601 being mounted on the bottom of the mounting plate 602. The mounting plate 602 is mounted to the base 1 via the third magnetic base 601. The top of the mounting plate 602 is mounted with an external locating pin 605 via a support column 604. The locating pin mechanism 6 locates the outer contour of the first steel plate in the workpiece 7 via the external locating pin 605. The locating pin mechanism 6 is used to locate the outer contour of the first steel plate, ensuring positional consistency and repeatability between multiple workpieces 7 of the same template, thereby improving the consistency of welding quality.

[0057] Several feeler gauges 4 are placed on the top of the base 1. The feeler gauges 4 are used to ensure that the gap widths of the welds in the workpiece 7 are the same. In particular, when the workpiece 7 needs to be welded with a filler wire or other working conditions that require a gap, a suitable feeler gauge 4 can be placed between two steel plates to ensure the consistency and accuracy of the gap size between the two steel plates, thereby ensuring the accuracy and consistency of the gaps in the workpiece 7.

[0058] The second magnetic base 301 and the third magnetic base 601 have the same structure and similar working process as the first magnetic base 201, which will not be described in detail here.

[0059] The working process of this utility model is as follows:

[0060] Each workpiece 7 of a certain type is equipped with a customized positioning mechanism 5. When the fixture device needs to change the layout of workpieces 7 of different types, the functional mechanism on the base 1 is first moved to a position that does not interfere with the replacement of the positioning mechanism 5. Then, the corresponding first positioning plate 501 is installed on the positioning bracket 503, and then the second positioning plate 502 is installed on the first positioning plate 501.

[0061] The required electromagnetic clamping mechanism 2 is installed to the corresponding position of the base 1 through the first positioning groove 506 on the first positioning plate 501, and the corresponding electromagnetic clamping mechanism 2 is locked and fixed on the base 1 through the first magnetic base 201;

[0062] The required positioning pin mechanism 6 is installed to the corresponding position of the base 1 through the second positioning slot 507 on the second positioning plate 502, and the corresponding positioning pin mechanism 6 is locked and fixed to the base 1 through the third magnetic base 601;

[0063] Remove the second positioning plate 502 from the first positioning plate 501 , and place the required auxiliary support mechanism 3 on the base 1 according to usage requirements. Use the second magnetic base 301 to lock and fix the corresponding auxiliary support mechanism 3 on the base 1 ;

[0064] After the rearrangement of the fixture device is completed, the workpiece 7 is placed. The workpiece 7 includes multiple steel plates. The positioning pin mechanism 6 is used to determine the placement position of the first steel plate in the workpiece 7. After placement, the workpiece 7 is adsorbed and fixed by the corresponding electromagnetic clamping mechanism 2.

[0065] (Usually, each steel plate has two welding edges, and the two welding edges are respectively placed on one of the electromagnets of the two electromagnetic clamping mechanisms 2);

[0066] The remaining steel plates are placed in sequence, and the two degrees of freedom of the subsequent steel plate are determined by the adjacent welded edges of the subsequent steel plate and the previous steel plate. The last degree of freedom of the corresponding steel plate is determined by the internal positioning pin 505, thereby positioning the corresponding steel plate. After each steel plate is placed, it is fixed by adsorption through the corresponding electromagnetic clamping mechanism 2;

[0067] The steel plates are placed one by one until the last steel plate is sandwiched between the two already placed steel plates. If the adjacent sides of the two adjacent steel plates to the last steel plate are not parallel, the last steel plate is positioned by the adjacent sides of the two adjacent already placed steel plates. If the adjacent sides of the two adjacent steel plates to the last steel plate are parallel, the last steel plate is positioned by an inner positioning pin 505 and the adjacent sides of the two adjacent steel plates to the last steel plate. After the last steel plate is positioned, it is adsorbed and fixed by the corresponding electromagnetic clamping mechanism 2, thereby completing the accurate clamping and fixing of the workpiece 7 on the clamping device, and then the workpiece 7 enters the welding process.

[0068] In addition, during the placement of the steel plate, the outer contour of the steel plate can be positioned by the vacant positioning pin mechanism 6 to replace the auxiliary positioning function of the inner positioning pin 506, thereby assisting in positioning the steel plate.

[0069] The process of placing the steel plate on the fixture is as follows:

[0070] like Figure 7 As shown, taking the workpiece 7 including four steel plates as an example, the four steel plates are defined as steel plate ① (corresponding to the first steel plate), steel plate ②, steel plate ③, and steel plate ④;

[0071] Steel plate ① is positioned by the positioning pin mechanism 6, and then subsequent steel plates can be placed in the order of steel plate ②, steel plate ③, steel plate ④, steel plate ②, steel plate ④, steel plate ③, steel plate ④, steel plate ③, steel plate ②, or steel plate ④, steel plate ②, steel plate ③;

[0072] Take the order of placing steel plate ②, steel plate ③, steel plate ④ (steel plate ④ corresponds to the last steel plate) as an example:

[0073] When placing the steel plate ②, the steel plate ② is positioned by the adjacent edge of the steel plate ① and the two inner positioning pins 505;

[0074] Then, steel plate ③ is positioned and placed, relying on the adjacent edge of steel plate ② close to steel plate ③ and several internal positioning pins 505 (not shown in the figure). At this time, the two adjacent steel plates to be placed are steel plate ① and steel plate ③, and the corresponding adjacent edges on the two steel plates are parallel, then steel plate ④ also needs to rely on the internal positioning pins 505 for auxiliary positioning.

[0075] Take the order of placing steel plate ②, steel plate ④, and steel plate ③ (steel plate ③ corresponds to the last steel plate) as an example:

[0076] When placing the steel plate ②, the steel plate ② is positioned by the adjacent edge of the steel plate ① and the two inner positioning pins 505;

[0077] When placing the steel plate ④, the steel plate ④ is positioned by relying on the adjacent edge of the steel plate ① close to the steel plate ④ and an inner positioning pin 505;

[0078] At this time, the two adjacent steel plates to be placed are steel plate ② and steel plate ④, and the corresponding adjacent edges of the two steel plates are not parallel, so the steel plate ③ is positioned and placed based on the adjacent edges of the two steel plates;

[0079] This arrangement order is more efficient.

[0080] The working processes of the other two placement orders are similar to the two example processes mentioned above and will not be repeated here.

[0081] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the scope of protection of the utility model.

Claims

1. A door ring welding fixture device with quick changeover capability, characterized in that: It comprises a base (1), wherein a clamping unit and a positioning unit that cooperate with each other are mounted on the top of the base (1); the workpiece (7) is positioned by the positioning unit, and the workpiece (7) is clamped and fixed by the clamping unit; The clamping unit comprises a plurality of electromagnetic clamping mechanisms (2), wherein a single electromagnetic clamping mechanism (2) adopts an electromagnetic method to adsorb the workpiece (7), and a first magnetic seat (201) for quick-release engagement with the base (1) is provided in the single electromagnetic clamping mechanism (2); The positioning unit comprises a plurality of positioning pin mechanisms (6), and a third magnetic seat (601) for quick-release engagement with the base (1) is provided in each positioning pin mechanism (6); The arrangement position of the corresponding electromagnetic clamping mechanism (2) on the base (1) is adjusted by the first magnetic seat (201), and the arrangement position of the corresponding positioning pin mechanism (6) on the base (1) is adjusted by the third magnetic seat (601), thereby making the clamping unit and the positioning unit compatible with workpieces (7) of different types.

2. A door ring welding fixture device capable of rapid changeover according to claim 1, characterized in that: A positioning mechanism (5) is also installed on the top of the base (1). The positioning mechanism (5) has the following structure: it includes a positioning bracket (503), a first positioning plate (501) is installed on the top of the positioning bracket (503), and a plurality of first positioning grooves (506) are provided on the edge of the first positioning plate (501). The first positioning grooves (506) are used to locate the arrangement position of the electromagnetic clamping mechanism (2); A second positioning plate (502) is detachably mounted on the first positioning plate (501), and a plurality of second positioning grooves (507) for positioning the positioning pin mechanism (6) are provided on the edge of the second positioning plate (502).

3. A door ring welding fixture device capable of rapid changeover according to claim 2, characterized in that: A plurality of inner positioning pins (505) are mounted on the top end surface of the first positioning plate (501), and the inner positioning pins (505) correspond to the inner contour of the workpiece (7), thereby positioning the workpiece (7).

4. A door ring welding fixture capable of rapid changeover according to claim 2, characterized in that: The first positioning plate (501) and the second positioning plate (502) are detachably mounted via a connecting pin (504).

5. The door ring welding fixture device capable of rapid changeover according to claim 2, characterized in that: An avoidance groove is provided in the single first positioning groove (506).

6. The door ring welding fixture device capable of rapid changeover according to claim 1, characterized in that: The structure of a single electromagnetic clamping mechanism (2) is as follows: it includes a first support seat (202), the first support seat (202) is mounted in conjunction with a base (1) via a plurality of first magnetic seats (201), an electromagnet assembly is mounted in conjunction with the top of the first support seat (202), and the electromagnet assembly is energized and magnetized to thereby adsorb a workpiece (7).

7. A door ring welding fixture capable of rapid changeover according to claim 6, characterized in that: The single-group electromagnet assembly comprises a first electromagnet (203) and a second electromagnet (204) arranged at intervals, wherein the first electromagnet (203) adsorbs one steel plate of the workpiece (7), and the second electromagnet (204) adsorbs another steel plate of the workpiece (7).

8. The door ring welding fixture device capable of rapid changeover according to claim 1, characterized in that: The top of the base (1) is also equipped with a plurality of auxiliary support mechanisms (3), the auxiliary support mechanisms (3) being used to support the workpiece (7), and the structure of a single auxiliary support mechanism (3) is as follows: comprising a second support seat (302), the second support seat (302) being equipped with the base (1) via a second magnetic seat (301), and a support plate (303) for supporting the workpiece (7) being fixed on the top of the second support seat (302).

9. The door ring welding fixture device capable of rapid changeover according to claim 1, characterized in that: The structure of a single positioning pin mechanism (6) is as follows: it includes a mounting plate (602), the bottom of the mounting plate (602) is cooperatingly mounted with at least one third magnetic seat (601), the mounting plate (602) is cooperatingly mounted with the base (1) via the third magnetic seat (601), the top of the mounting plate (602) is cooperatingly mounted with an external positioning pin (605) via a support column (604), and the positioning pin mechanism (6) locates the outer contour of the first steel plate in the workpiece (7) via the external positioning pin (605).

10. The door ring welding fixture device capable of rapid changeover according to claim 1, characterized in that: Several feeler gauges (4) are placed on the top of the base (1).

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