A fixture for welding an automobile roof and a method of using the same

Abstract

The present application relates to the technical field of automobile manufacturing, and particularly relates to a clamp for welding an automobile roof and a use method thereof. The clamp for welding the automobile roof comprises a pressing frame, a first driving mechanism and a plurality of top supporting pieces. The pressing frame is provided with a pressing mechanism for pressing the edge of the automobile roof downward. The top supporting pieces are arranged in a circumferential interval around the lower end edge of the sunroof mounting hole. The first driving mechanism connected to the pressing frame can drive the top supporting pieces at the lower end edge of the sunroof mounting hole to upwardly support the lower end edge of the sunroof mounting hole, so that the circumferential side of the sunroof mounting hole is pre-pressed and deformed upward. When the automobile roof is pressed downward, the upward pre-pressing deformation can offset the subsidence of the edge of the sunroof mounting hole, so that uneven subsidence of the edge of the sunroof mounting hole is avoided. The first driving mechanism is used to move the top supporting pieces into the sunroof mounting hole, so that the top supporting pieces can be moved out of the sunroof mounting hole, and the clamp for welding the automobile roof is separated from the automobile roof after welding.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile manufacturing, in particular to a clamp for welding automobile roof and a method thereof. BACKGROUND

[0002] The automobile roof is connected to the vehicle body by laser brazing, which has the characteristics of good rigidity, beautiful appearance and low cost, and is widely used in the industry. Laser brazing requires a weld gap of less than 0.3 mm to obtain a beautiful weld appearance. The automobile roof and the vehicle body are both sheet metal parts. After the automobile roof is placed in the installation position, there is a sheet metal gap between the automobile roof and the roof mounting hole located at the upper end of the vehicle body. To reduce the weld width, a pressing frame is used to drive the pressing mechanism to move downward, so that the pressing mechanism applies a certain downward pressure to the roof to reduce the sheet metal gap. However, after the pressing mechanism presses the roof downward, the edges of the sunroof mounting hole located in the middle of the automobile roof for installing the panoramic sunroof will sink unevenly. The sinking amount of the part with larger sinking amount of the sunroof mounting hole edge is about 3mm, and the sinking amount of the part with smaller sinking amount of the sunroof mounting hole edge is about 2mm. The different sinking amounts will affect the installation accuracy of the panoramic sunroof, resulting in abnormal noise of the panoramic sunroof during opening and closing. SUMMARY

[0003] The technical problem to be solved by the present application is that during the installation of the automobile roof, the edges of the sunroof mounting hole will sink unevenly, affecting the installation accuracy of the panoramic sunroof and causing abnormal noise of the panoramic sunroof during opening and closing.

[0004] To solve the above technical problems, the purpose of the present application is to provide a clamp for welding automobile roof, which can be arranged with a sunroof mounting hole in the middle of the automobile roof. The clamp for welding automobile roof comprises:

[0005] A pressing frame is arranged above the automobile roof, and a pressing mechanism is arranged on the pressing frame to press downward on the edge of the automobile roof.

[0006] A first driving mechanism is connected to the pressing frame, and a plurality of top support pieces are connected to the first driving mechanism. Each top support piece is arranged at a circumferential interval around the lower end edge of the sunroof mounting hole. The first driving mechanism is used to drive each top support piece to upwardly support the lower end edge of the sunroof mounting hole, so that the edge of the automobile roof abuts against the pressing mechanism, and the circumferential side of the sunroof mounting hole is deformed upwardly by pre-pressure. The first driving mechanism is also used to drive each top support piece to move into the sunroof mounting hole to pass upwardly through the sunroof mounting hole.

[0007] As a preferred solution, the first driving mechanism comprises a plurality of swing members and a plurality of driving members, each of the driving members is connected to the pressing frame, each of the top support members is arranged on each of the swing members in one-to-one correspondence, each of the driving members drives each of the swing members to swing so as to move each of the top support members to the lower end edge of the sunroof mounting hole or make each of the top support members pass through the sunroof mounting hole.

[0008] As a preferred solution, an adjusting gasket is arranged between each of the top support members and each of the swing members.

[0009] As a preferred solution, a workpiece recognition sensor for detecting whether the automobile roof has the sunroof mounting hole is arranged on the pressing frame; the automobile roof welding clamp comprises a controller, the workpiece recognition sensor and the first driving mechanism are electrically connected to the controller, when the workpiece recognition sensor detects that the automobile roof does not have the sunroof mounting hole, the first driving mechanism drives each of the top support members to remain above the automobile roof.

[0010] As a preferred solution, the pressing mechanism comprises a plurality of elastic pressing structures arranged along the length direction of the to-be-welded edge of the automobile roof, each of the elastic pressing structures is connected to the pressing frame, each of the elastic pressing structures is connected with a pressing block, and the pre-pressing force of each of the elastic pressing structures is adjustable.

[0011] As a preferred solution, each of the elastic pressing structures comprises a swing lever and an elastic compression member, the middle part of each of the swing levers is hinged to the pressing frame, the first end of each of the swing levers is connected to the pressing block, the second end of each of the swing levers is provided with a mounting hole, the first end of each of the elastic compression members is abutted to the pressing frame, the second end of each of the elastic compression members is inserted into each of the mounting holes, each of the mounting holes is provided with an adjusting rod which is movable along the axial direction of the mounting hole, and the second end of each of the elastic compression members is abutted to the end part of each of the adjusting rods.

[0012] As a preferred solution, the first end of each of the swing levers is fixed with a tension test ring through which a tension hook of a tension meter is passed.

[0013] As a preferred solution, each of the swing levers comprises a first swing arm and a second swing arm arranged in a clamp, the intersection part of the first swing arm and the second swing arm is hinged to the pressing frame, the pressing block is connected to the end part of the first swing arm, the elastic compression member is connected to the end part of the second swing arm, the middle part of the second swing arm is provided with a limiting slot, a limiting rod is passed through the limiting slot, and the limiting rod is fixed to the pressing frame.

[0014] A use method of the above-mentioned automobile roof welding clamp, comprising the following steps:

[0015] Step S1, using the first driving mechanism to move each top support to the lower end edge of the sunroof mounting hole, so that the upper end of each top support supports the lower end edge of the sunroof mounting hole upward, so that the periphery of the sunroof mounting hole is subjected to upward pre-pressure;

[0016] Step S2, move the pressing frame downward, so that the weld width between the automobile roof and the roof mounting hole on the upper end of the vehicle body is less than a set value;

[0017] Step S3, after the automobile roof is welded, using the first driving mechanism to move each top support into the sunroof mounting hole or to move each top support above the automobile roof;

[0018] Step S4, move the pressing frame upward, so that the automobile roof welding clamp is separated from the welded automobile roof.

[0019] As a preferred solution, before step S1, comprising:

[0020] Step S01, according to the amount of subsidence of the sunroof mounting hole edge during the process of pressing the automobile roof downward, adjust the thickness of each adjusting gasket, so that the thickness of the adjusting gasket at the position with larger subsidence amount is greater than the thickness of the adjusting gasket at the position with smaller subsidence amount.

[0021] Compared with the prior art, the beneficial effects of the present application are:

[0022] The automobile roof welding clamp of the present application comprises a pressing frame, a first driving mechanism and a plurality of top supports, the pressing frame is provided with a pressing mechanism for pressing the edge of the automobile roof downward; each top support is arranged around the periphery of the lower end edge of the sunroof mounting hole; the first driving mechanism is connected to the pressing frame, and the first driving mechanism can drive each top support located at the lower end edge of the sunroof mounting hole to support the lower end edge of the sunroof mounting hole upward, so that the upper end edge of the automobile roof abuts against the pressing mechanism, thereby causing the periphery of the sunroof mounting hole to be deformed by upward pre-pressure. During the process of pressing the automobile roof downward, the upward pre-pressure deformation can offset the amount of subsidence of the sunroof mounting hole edge, thereby avoiding uneven subsidence of the sunroof mounting hole edge, ensuring the installation accuracy of the panoramic sunroof, and avoiding abnormal noise during the opening and closing process of the panoramic sunroof; after welding, each top support is moved into the sunroof mounting hole by the first driving mechanism, so that each top support can be removed from the sunroof mounting hole, and the automobile roof welding clamp is separated from the welded automobile roof. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the isometric view of the automobile roof welding clamp of the present application in the top view direction;

[0024] Figure 2The top view of the automobile roof welding clamp of the present application;

[0025] Figure 3 The Figure 2 The enlarged view of A in the figure;

[0026] Figure 4 The structure schematic diagram of the first driving structure in the first embodiment when the automobile roof is hidden and the roof support is in the first position;

[0027] Figure 5 The structure schematic diagram of the first driving structure in the first embodiment when the automobile roof is hidden and the roof support is in the second position;

[0028] Figure 6 The structure schematic diagram of the second driving structure in the first embodiment when the automobile roof is hidden and the roof support is in the first position;

[0029] Figure 7 The structure schematic diagram of the second driving structure in the first embodiment when the automobile roof is hidden and the roof support is in the second position;

[0030] Figure 8 The first axis drawing of the pressing mechanism;

[0031] Figure 9 The second axis drawing of the pressing mechanism;

[0032] In the figure, 100, automobile roof; 101, sunroof mounting hole; 1, pressing frame; 2, first driving mechanism; 21, swing piece; 22, driving piece; 23, adjusting gasket; 3, roof support; 4, workpiece identification sensor; 51, elastic pressing structure; 511, swing rod; 5111, first swing arm; 5112, second swing arm; 51121, limiting groove; 512, elastic compression piece; 513, adjusting rod; 514, limiting rod; 52, pressing block. DETAILED DESCRIPTION

[0033] The specific embodiments of the present application are described in further detail below in combination with the figures and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0034] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. It should be understood that the terms "first", "second", and the like are used to describe various information in the present application, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, the "first" information can also be referred to as "second" information without departing from the scope of the present application, and similarly, the "second" information can also be referred to as "first" information.

[0035] As Figures 1 to 9 shown, the automobile roof welding clamp of the present application exerts a downward holding pressure on the automobile roof 100 when welding the automobile roof 100 on the vehicle body, and the middle part of the automobile roof 100 can be arranged with a sunroof mounting hole 101. The preferred embodiment of the automobile roof welding clamp of the present application comprises:

[0036] The pressing frame 1 is arranged above the automobile roof 100, and the pressing frame 1 is provided with a holding mechanism that presses downward on the edge of the automobile roof 100;

[0037] The first driving mechanism 2 is connected to the pressing frame 1, and the first driving mechanism 2 is connected with a plurality of top support pieces 3, each top support piece 3 being arranged circumferentially spaced apart around the lower end edge of the sunroof mounting hole 101; the first driving mechanism 2 is used to drive each top support piece 3 to upwardly support the lower end edge of the sunroof mounting hole 101, so that the edge of the automobile roof 100 abuts against the holding mechanism, so that the circumferential side of the sunroof mounting hole 101 is pre-pressed and deformed upwardly; the first driving mechanism 2 is also used to drive each top support piece 3 to move into the sunroof mounting hole 101 to pass upwardly through the sunroof mounting hole.

[0038] Specifically, in the process of the pressing frame pressing the automobile roof 100 downward, the upward pre-deformation can offset the edge subsidence amount of the sunroof mounting hole 101, thereby avoiding uneven subsidence of the edge of the sunroof mounting hole 101, ensuring the installation accuracy of the panoramic sunroof, and avoiding abnormal sound of the panoramic sunroof in the opening and closing process; after welding, the first driving mechanism 2 is used to move each roof support 3 into the sunroof mounting hole 101 or above the automobile roof 100, so that each roof support 3 can be moved upward out of the sunroof mounting hole 101, and the automobile roof welding jig is separated from the automobile roof 100 after welding. The pre-deformation can be elastic deformation plus a small amount of plastic deformation, or can be all elastic deformation. The pre-deformation amount of different parts can be realized by adjusting the roof supporting degree of each roof support 3. The pre-deformation is less than or equal to the subsidence amount of the corresponding part when the automobile roof 100 is pressed downward.

[0039] The first driving mechanism 2 has various implementation modes, such as being provided as a double-shaft linear module, and the roof support 3 is connected to the output end of the double-shaft linear module. The double-shaft linear module can drive the roof support 3 to move horizontally and vertically, so that the roof support 3 can be moved to the lower end edge of the sunroof mounting hole 101, and the pre-deformation upward is generated at the position of the edge of the sunroof mounting hole 101. The double-shaft linear module can also drive each roof support 3 to move through the sunroof mounting hole 101 to above the automobile roof 100.

[0040] In the embodiment, in order to make the structure of the first driving mechanism compact, as shown in the figure, the first driving mechanism 2 includes a plurality of swing members 21 and a plurality of driving members 22. Each driving member 22 is connected to the pressing frame 1, and each roof support 3 is arranged on each swing member 21 in one-to-one correspondence. Each driving member 22 drives each swing member 21 to swing, so that each roof support 3 can be moved to the lower end edge of the sunroof mounting hole 101 or each roof support 3 can pass through the sunroof mounting hole 101. Figures 2 to 7

[0041] In order to facilitate adjustment of the pre-deformation of the roof support 3 on the automobile roof 100 at different parts, an adjusting gasket 23 is arranged between each roof support 3 and each swing member 21. By changing the thickness of the adjusting gasket 23, the pre-deformation amount of the roof support 3 on the automobile roof 100 at different parts can be adjusted.

[0042] Figure 4 、 Figure 5 ​The first embodiment of the first driving mechanism 2 is shown in the structural schematic diagram, wherein the driving member 22 is an oscillating cylinder, the oscillating member 21 is an L-shaped rod, one end of the L-shaped rod is rotationally connected with the rotating shaft of the oscillating cylinder, and the other end of the oscillating cylinder is connected with the jacking member 3. The L-shaped rod structure makes the driving member 22 of the present application more compact. In other embodiments of the present application, the oscillating member 21 can be a straight rod, and the oscillating cylinder and the jacking member 3 are respectively connected at the two ends of the straight rod. In the present embodiment, the first driving mechanism 2 arranged in the width direction of the sunroof mounting hole 101 adopts the structure shown in Figure 4 、 Figure 5 .

[0043] Figure 6 、 Figure 7 The second embodiment of the first driving mechanism 2 is shown in the structural schematic diagram, wherein the driving member 22 is a telescopic cylinder, the oscillating member 21 is also an L-shaped rod, one end of the oscillating member 21 is hingedly connected with the telescopic end of the telescopic cylinder, the telescopic cylinder is hingedly connected with the pressing frame 1, the middle part of the oscillating member 21 is hingedly connected with the pressing frame 1, and the other end of the oscillating member 21 is connected with the jacking member 3. In the present embodiment, the first driving mechanism 2 arranged in the length direction of the sunroof mounting hole 101 adopts the structure shown in Figure 6 、 Figure 7 .

[0044] In order to improve the application range of the clamp for welding the automobile roof, the pressing frame 1 is provided with a workpiece recognition sensor 4 for detecting whether the automobile roof 100 is provided with a sunroof mounting hole 101; the clamp for welding the automobile roof comprises a controller, the workpiece recognition sensor 4 and the first driving mechanism 2 are electrically connected with the controller, and when the workpiece recognition sensor 4 detects that the automobile roof 100 is not provided with a sunroof mounting hole 101, the first driving mechanism 2 drives each jacking member 3 to be kept above the automobile roof 100, so that the clamp for welding the automobile roof of the present embodiment can be applied to not only the vehicle model provided with a panoramic sunroof but also the vehicle model not provided with a panoramic sunroof. Specifically, the workpiece recognition sensor can be an infrared sensor, when the automobile roof 100 is provided with a sunroof mounting hole 101, the sunroof mounting hole 101 is not an entity structure and cannot block the detection light of the infrared sensor; when the automobile roof 100 is not provided with a sunroof mounting hole 101, the sunroof mounting hole 101 is an entity structure and can block the detection light of the infrared sensor; wherein the driving member 22 of the first driving mechanism 2 is connected with the controller.

[0045] The pressing mechanism comprises a plurality of elastic pressing structures 51 arranged at intervals along the length direction of the automobile roof to be welded, each elastic pressing structure 51 is connected with the pressing frame 1, each elastic pressing structure 51 is connected with a pressing block 52, and the pre-pressing force of each elastic pressing structure 51 is adjustable. The arrangement of the elastic pressing structure 51 can adjust the pressure of each pressing block 52 on the automobile roof 100 and can play a buffering role, thereby ensuring the stable pressing of the automobile roof.

[0046] The lower end of the automobile roof is often provided with a reinforcing rib, and the lower end of the peripheral side of the sunroof mounting hole 101 is often provided with a sunroof reinforcing plate. For the vehicle model provided with the sunroof reinforcing plate, each roof support 3 is in abutment with the lower end of the sunroof reinforcing plate when located at the first position. The arrangement of the reinforcing rib and the sunroof reinforcing plate causes the compression deformation capacity of different parts of the peripheral side of the automobile roof 100 to be different. According to the strength of the corresponding parts of the peripheral side of the automobile roof 100, the pre-compression amount of the elastic compression structure 51 located at the part with higher compression strength is adjusted to be larger, and the pre-compression amount of the elastic compression structure 51 located at the part with lower compression strength is adjusted to be smaller. This can make the gap of the sheet metal joint more uniform during the process of pressing the automobile roof 100 downward, thereby improving the welding quality.

[0047] In the embodiment, as shown in Figure 8 , Figure 9 Each elastic compression structure 51 includes a swing rod 511 and an elastic compression member 512. The middle part of each swing rod 511 is hinged to the pressing frame 1. The first end of each swing rod 511 is connected to the pressing block 52. The second end of each swing rod 511 is provided with a mounting hole. The first end of each elastic compression member 512 is in abutment with the pressing frame 1. The second end of each elastic compression member 512 is inserted into the mounting hole and can move along the axial direction of the mounting hole. An adjusting rod 513 is in abutment with the end of each elastic compression member 512. The elastic compression structure 51 is arranged in the elastic rocker arm type structure of the swing rod and the compression spring, so that the structure of the elastic compression structure 51 is compact. In the embodiment, the adjusting rod 513 is a bolt arranged coaxially with the mounting hole. The pre-compression amount of each elastic compression member 512 can be adjusted by screwing the bolt. Specifically, in the embodiment, the elastic compression member 512 is a compression spring. In other embodiments of the application, the elastic compression member can be an elastic rubber column.

[0048] The first end of each swing rod 511 is fixed with a tension test ring through which a tension hook of a tension meter passes. The arrangement of the tension test ring facilitates the accurate control of the pre-compression amount of each elastic compression member 512 by the operator.

[0049] To ensure the stability of each swing rod 511 during swinging, each swing rod 511 includes a first swing arm 5111 and a second swing arm 5112 arranged in a clamp. The intersection of the first swing arm 5111 and the second swing arm 5112 is hinged to the pressing frame 1. The pressing block 52 is connected to the end of the first swing arm 5111. The elastic compression member 512 is connected to the end of the second swing arm 5112. The middle part of the second swing arm 5112 is provided with a limiting groove 51121. A limiting rod 514 is inserted into the limiting groove 51121. The limiting rod 514 is fixed to the pressing frame 1. Specifically, as shown in Figure 9As shown, the limiting groove 51121 is arranged along the length of the second swing arm 5112, and in the non-working state, the limiting rod 514 abuts against the upper side wall of the limiting groove 51121, thereby limiting the swing position of the swing rod 511.

[0050] In the embodiment, the pressing frame 1 comprises a pressing frame body and a second driving mechanism arranged at the upper end of the pressing frame body and used for driving the pressing frame body to move up and down. The first driving mechanism and the pressing mechanism are both connected to the lower end of the pressing frame body, and the second driving mechanism can be a mechanical hand or a telescopic driving device.

[0051] Specifically, in the embodiment, the second driving mechanism drives the pressing frame body to move downward, so that each pressing block 52 abuts against the upper end edge of the automobile roof, and then the first driving mechanism 2 drives each roof support 3 to upwardly support the lower end edge position of the sunroof mounting hole 101, so that the edge of the sunroof mounting hole 101 is pre-pressed and deformed upwardly, and then the second driving mechanism continues to drive the automobile roof 100 to move downward, so that the lower end edge of the automobile roof 100 is pressed by the support surface of the roof mounting hole located at the upper end of the vehicle body. The second driving mechanism drives the pressing frame body to continue to move downward, thereby reducing the sheet metal gap between the automobile roof 100 and the support surface of the roof mounting hole. In the process of gradually reducing the sheet metal gap, the compression amount of the elastic pressing structure 51 gradually increases. Moreover, the first driving mechanism 2 and each roof support 3 move downward synchronously with the pressing frame body, and the elastic deformation part of the pre-pressed deformation of the edge of the sunroof mounting hole 101 is restored synchronously in the process of moving downward of each roof support 3. The setting of the pre-pressed deformation reduces the sinking amount of the edge of the sunroof mounting hole 101, and each roof support can stop the sinking deformation of the edge of the sunroof mounting hole 101 in the process of moving downward with the pressing frame, thereby avoiding the local sinking of the edge of the sunroof mounting hole 101 exceeding the upper end surface of the corresponding roof support, and further improving the sinking consistency of the edge of the sunroof mounting hole 101.

[0052] A method for using the automobile roof welding clamp, comprising the following steps:

[0053] Step S1, moving each roof support 3 to the lower end edge position of the sunroof mounting hole by using the first driving mechanism 2, so that the upper end of each roof support 3 upwardly supports the lower end edge of the sunroof mounting hole 101, so that the periphery of the sunroof mounting hole 101 is pre-pressed upwardly;

[0054] Step S2, moving the pressing frame 1 downward, so that the welding seam width between the automobile roof 100 and the roof mounting hole at the upper end of the vehicle body is less than a set value; in the embodiment, the set value is 0.3 mm;

[0055] Step S3, after the automobile roof is welded, moving each roof support 3 away from the sunroof mounting hole 101 by using the first driving mechanism 2.

[0056] Step S4, move the pressing frame 1 upwards, so that the automobile roof welding clamp is separated from the automobile roof 100.

[0057] Before step S1, it includes:

[0058] Step S01, according to the sinking amount of the sunroof mounting hole 101 edge during the process of pressing the automobile roof 100 downwards, adjust the thickness of each adjusting gasket 23, so that the thickness of the adjusting gasket 23 at the position with larger sinking amount is greater than the thickness of the adjusting gasket 23 at the position with smaller sinking amount.

[0059] Further, step S01 also includes adjusting the pre-compression amount of each elastic pressing structure 51, and the pre-compression amount of the elastic pressing structure 51 at the position with lower compression strength is smaller than the pre-compression amount of the elastic pressing structure 51 at the position with lower compression strength.

[0060] Further, when adjusting the pre-compression amount of the elastic pressing structure 51, the pull hook of the tension meter is inserted through the tension test ring, and whether the pre-compression amount of the elastic pressing structure 51 is adjusted in place is detected by the size of the tension.

[0061] In summary, the automobile roof welding clamp of the present application comprises a pressing frame 1 and a first driving mechanism 2, the pressing frame 1 is arranged above the automobile roof 100, and the pressing frame 1 is provided with a pressing mechanism for pressing the edge of the automobile roof 100 downwards; the first driving mechanism 2 is connected to the pressing frame 1, and the first driving mechanism 2 is connected with a plurality of top supporting pieces 3, each top supporting piece 3 is arranged at intervals around the circumferential direction of the lower end edge of the sunroof mounting hole 101; the first driving mechanism 2 is used to drive each top supporting piece 3 to upwardly support the lower end edge of the sunroof mounting hole 101, so that the edge of the automobile roof 100 abuts against the pressing mechanism, and the circumferential side of the sunroof mounting hole 101 is deformed by pre-compression upwards; the first driving mechanism 2 is also used to drive each top supporting piece 3 to move into the sunroof mounting hole 101 to pass through the sunroof mounting hole upwards. During the process of pressing the automobile roof 100 downwards by the pressing frame, the pre-compression deformation upwards can offset the sinking amount of the edge of the sunroof mounting hole 101, thereby avoiding uneven sinking of the edge of the sunroof mounting hole 101, ensuring the installation accuracy of the panoramic sunroof, and avoiding abnormal noise of the panoramic sunroof during opening and closing; after welding is completed, each top supporting piece 3 is moved into the sunroof mounting hole 101 or above the automobile roof 100 by the first driving mechanism 2, so that each top supporting piece 3 can move upwards out of the sunroof mounting hole 101, and the automobile roof welding clamp is separated from the automobile roof 100 after welding.

[0062] The above merely describes the preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, several improvements and replacements can be made without departing from the technical principles of the present application, and these improvements and replacements should also be considered as the protection scope of the present application.

Claims

1. A fixture for welding an automobile roof, wherein a sunroof mounting hole (101) can be arranged in the middle of the automobile roof (100), characterized in that, The fixtures for welding automotive roofs include: A pressure frame (1) is arranged above the car roof (100), and the pressure frame (1) is provided with a pressing mechanism that presses down on the edge of the car roof (100); A first drive mechanism (2) is connected to the pressure frame (1). The first drive mechanism (2) is connected to a plurality of top support members (3), each of the top support members (3) being arranged circumferentially around the lower edge of the sunroof mounting hole (101). The first drive mechanism (2) is used to drive each of the top support members (3) to push upward against the lower edge of the sunroof mounting hole (101), so that the edge of the car roof (100) abuts against the pressing mechanism, causing an upward pre-compression deformation to occur on the periphery of the sunroof mounting hole (101). The first drive mechanism (2) is also used to drive each of the top support members (3) to move to the sunroof mounting hole (101). The window mounting hole (101) is passed upward through the skylight mounting hole; the first drive mechanism (2) includes a plurality of swing members (21) and a plurality of drive members (22), each of the drive members (22) is connected to the pressure frame (1), each of the top support members (3) is arranged one-to-one on each of the swing members (21), each of the drive members (22) drives each of the swing members (21) to swing so that each of the top support members (3) can move to the lower edge of the skylight mounting hole (101) or pass through the skylight mounting hole (101); each of the top support members (3) and each of the swing members (21) is provided with an adjusting shim (23).

2. The fixture for welding automobile roofs according to claim 1, characterized in that, The pressure frame (1) is equipped with a workpiece identification sensor (4) for detecting whether the car roof (100) has the sunroof mounting hole (101); the car roof welding fixture includes a controller, the workpiece identification sensor (4) and the first drive mechanism (2) are both electrically connected to the controller, when the workpiece identification sensor (4) detects that the car roof (100) does not have the sunroof mounting hole (101), the first drive mechanism (2) drives each of the top support members (3) to remain above the car roof (100).

3. The fixture for welding automobile roofs according to claim 1, characterized in that, The pressing mechanism includes a plurality of elastic pressing structures (51) arranged at intervals along the length of the side to be welded on the car roof. Each elastic pressing structure (51) is connected to the pressure frame (1), and each elastic pressing structure (51) is connected to a pressure block (52). The pre-pressure of each elastic pressing structure (51) is adjustable.

4. The fixture for welding automobile roofs according to claim 3, characterized in that, Each of the elastic pressure structures (51) includes a rocker arm (511) and an elastic compression member (512). The middle part of each rocker arm (511) is hinged to the pressure frame (1). The first end of each rocker arm (511) is connected to the pressure block (52). The second end of each rocker arm (511) is provided with a mounting hole. The first end of each elastic compression member (512) abuts against the pressure frame (1). The second end of each elastic compression member (512) is inserted into each mounting hole. Each mounting hole is provided with an adjusting rod (513) that can move axially along the mounting hole. The second end of each elastic compression member (512) abuts against the end of each adjusting rod (513).

5. The fixture for welding automobile roofs according to claim 4, characterized in that, Each of the aforementioned pendulum rods (511) has a tension test ring fixed at its first end for the pull hook of the tension gauge to pass through.

6. The fixture for welding automobile roofs according to claim 4, characterized in that, Each of the aforementioned swing arms (511) includes a first swing arm (5111) and a second swing arm (5112) arranged in a clamping configuration. The intersection of the first swing arm (5111) and the second swing arm (5112) is hinged to the pressure frame (1). The pressure block (52) is connected to the end of the first swing arm (5111), and the elastic compression member (512) is connected to the end of the second swing arm (5112). A limiting groove (51121) is provided in the middle of the second swing arm (51121), and a limiting rod (514) passes through the limiting groove (51121). The limiting rod (514) is fixed on the pressure frame (1).

7. A method of using the welding fixture for automobile roofs according to any one of claims 1 to 6, characterized in that, Includes the following steps: Step S1: Use the first drive mechanism (2) to move each top support (3) to the lower edge of the sunroof mounting hole (101), so that the upper end of each top support (3) pushes upward against the lower edge of the sunroof mounting hole (101), so that the periphery of the sunroof mounting hole (101) is subjected to an upward pre-pressure. Step S2: Move the pressure frame (1) downward so that the weld width between the car roof (100) and the roof mounting hole at the upper end of the car body is less than the set value; Step S3: After the car roof is welded, the first drive mechanism (2) is used to move each of the top support members (3) into the sunroof mounting hole (101) or to move each of the top support members (3) above the car roof (100). Step S4: Move the pressure frame (1) upward so that the welding fixture for the car roof is disengaged from the welded car roof (100).

8. The method of using the fixture for welding automobile roofs according to claim 7, characterized in that, Before step S1, the following are included: Step S01: Based on the amount of sinking of the edge of the sunroof mounting hole (101) during the process of pressing down the car roof (100), adjust the thickness of each adjusting shim (23) so that the thickness of the adjusting shim (23) in the part with a larger sinking is greater than the thickness of the adjusting shim (23) in the part with a smaller sinking.

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