Device for positioning and pressing permanent base plate during assembly and welding of vehicle body

Abstract

The invention discloses a device for positioning and pressing a permanent base plate during assembly and welding of a vehicle body. The device comprises a main body frame, the sectional material positioning and fixing assembly is arranged on the front side of the main body frame, abuts against the top of the inner cavity of the sectional material through a sectional material forming ejector block at the upper end of the sectional material positioning and fixing assembly and keeps the position opposite to the sectional material; the base plate positioning structure is arranged on the rear side of the main body frame and used for pressing the permanent base plate and keeping the relative distance between the permanent base plate and the sectional material; a linkage assembly is arranged between the sectional material positioning and fixing assembly and the base plate positioning structure, and when the sectional material positioning and fixing assembly is driven by the linkage assembly to abut against an inner cavity of the sectional material upwards, the linkage assembly synchronously drives the base plate positioning structure to press the permanent base plate downwards. The positioning and pressing device for the permanent base plate is used for conducting base plate positioning, installing and welding operation, the consistency size requirement of the extension amount of the base plate can be effectively guaranteed, and the attaching gap between the base plate and a sectional material is controlled to be smaller than or equal to 0.2 mm through positioning and pressing.

Description

Technical Field

[0001] This invention relates to the field of EMU car body manufacturing technology, and in particular to a device for positioning and pressing permanent backing plates for car body assembly welding. Background Technology

[0002] During aluminum alloy welding, due to the material's rapid thermal conductivity and low melting point, using a permanent backing plate can effectively support the molten metal and prevent defects such as burn-through and collapse in thin-walled components (thickness ≤ 6mm). This ensures the quality of the weld formation on the back side.

[0003] In actual assembly welding, the required width is ≥15mm on one side for butt welding; the gap is controlled to ≤0.2mm, while in special local locations it can be 0.5mm, but not exceeding 10% of the weld length. Currently, there are the following problems with manually assembled permanent backing plates:

[0004] 1. During the welding of long butt joints, the consistency of the outer width dimension on one side is poor;

[0005] 2. The wave deformation is caused by manually controlling the gap by point pressing or hammering, and the maximum gap can reach 2mm in some local protrusions;

[0006] The above two issues cause inconsistent gaps at the weld root, which can easily lead to burn-through, weld collapse, and other problems. In addition, existing technologies mostly use F-type clamps for positioning, which has low positioning efficiency and poor fit.

[0007] Therefore, based on the above-mentioned technical problems, those skilled in the art urgently need to develop a device for positioning and pressing permanent pads for vehicle body welding. Summary of the Invention

[0008] The purpose of this invention is to provide a device for positioning and pressing permanent backing plates for welding vehicle bodies. Using this device for positioning and pressing permanent backing plates during welding operations can effectively ensure the consistency of the backing plate protrusion. The gap between the backing plate and the profile is controlled to ≤0.2mm through positioning and pressing.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] The present invention provides a device for positioning and clamping permanent backing plates for welding vehicle bodies, the positioning and clamping device comprising:

[0011] Main framework;

[0012] A profile positioning and fixing assembly is disposed on the front side of the main frame and mates with the inner cavity of the profile. The profile positioning and fixing assembly abuts against the top of the inner cavity of the profile through a profile forming top block at its upper end and maintains its relative position with the profile; and

[0013] A pad positioning structure is provided on the rear side of the main frame. The pad positioning structure is used to press the permanent pad and maintain the relative distance between the permanent pad and the profile.

[0014] A linkage component is provided between the profile positioning and fixing component and the pad positioning structure. When the profile positioning and fixing component is driven upward to abut against the inner cavity of the profile through the linkage component, the linkage component simultaneously drives the pad positioning structure to press down the permanent pad.

[0015] Furthermore, the main framework includes:

[0016] Main base plate; and

[0017] Main body connectors fixed to the main body base plate;

[0018] The profile positioning and fixing assembly is movably connected to the front side of the main body connector through the linkage assembly, and the pad positioning structure is connected to the rear side of the main body connector.

[0019] Furthermore, the linkage between the profile positioning and fixing assembly and the pad positioning structure is configured as follows:

[0020] When the linkage component drives the profile positioning and fixing component to flip upward and abut against the inner cavity of the profile through the profile forming top block, the linkage component simultaneously presses the main body connector so that the main body connector drives the pad positioning structure to press the permanent pad.

[0021] Furthermore, the main connector is divided into a front part, a middle part, and a rear part.

[0022] The main body connector is configured with a protruding structure in the middle, and a horizontal adjustment groove extending to the rear of the main body connector is machined in the lower part of the middle part of the main body connector, and a plurality of embedded grooves are machined in the horizontal adjustment groove at intervals.

[0023] Furthermore, the linkage component includes:

[0024] Linkages; and

[0025] A pressure rod structure that is movably connected to both the connecting rod and the main body connector to drive the connecting rod to swing;

[0026] The connecting rod is divided into a front part, a middle part, and a rear part.

[0027] The rear part of the connecting rod is rotatably connected to the middle part of the main body connecting member by a pin, and the profile positioning and fixing component is installed at the front part of the connecting rod;

[0028] The pressure rod structure is movably connected to the middle of the connecting rod by a pin, and the pressure rod structure is also movably connected to the front of the main body connector by a pin.

[0029] Furthermore, the front part of the connecting rod is configured as an elongated ring structure;

[0030] The profile positioning and fixing assembly includes:

[0031] A screw rod passing through a through hole at the front of the connecting rod, with the upper end of the screw rod fixed to the profile forming top block; and

[0032] The locking nut structure connected to the screw;

[0033] The screw maintains its relative position to the front of the connecting rod and the extension length of the upper end of the screw through the locking nut structure.

[0034] Furthermore, the locking nut structure includes an upper locking nut and a lower locking nut, both of which are provided with a retainer that mates with the front of the connecting rod, and the screw is threadedly connected to both the upper and lower locking nuts;

[0035] A spring is fitted onto the screw.

[0036] Furthermore, the inner cavity of the profile is a triangular inner cavity, and the profile forming top block is configured as a triangular top block that matches the triangular inner cavity.

[0037] Furthermore, the pressure bar structure includes:

[0038] The main compression member and the secondary compression member located inside the main compression member;

[0039] The lower part of the main pressure rod is rotatably connected to the front part of the main body connector by a pin, and the middle part of the main pressure rod is rotatably connected to the upper part of the auxiliary pressure rod by a pin.

[0040] The lower part of the auxiliary pressure rod is rotatably connected to the middle part of the connecting rod via a pin.

[0041] Furthermore, the pad positioning structure includes:

[0042] A positioning connecting rod, one end of which is disposed in any of the embedding slots of the horizontal adjustment groove of the main body connecting frame, and the other end extending toward the rear end of the main body frame; and

[0043] A pad positioning block is connected to the rear end of the main frame by extending the positioning connecting rod. The lower surface of the pad positioning block has a protrusion that matches the groove on the upper surface of the permanent pad.

[0044] The positioning connecting rod can move along the horizontal adjustment groove to adjust the distance of the pad positioning block relative to the main frame.

[0045] In the above technical solution, the device for positioning and pressing permanent backing plates for vehicle body welding provided by the present invention has the following beneficial effects:

[0046] The present invention uses a positioning and clamping device for a permanent pad to perform pad positioning and welding operations, which can effectively ensure the consistency of the pad extension size requirements and control the fit gap between the pad and the profile to ≤0.2mm through positioning and clamping. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0048] Figure 1 This is a schematic diagram of a device for positioning and pressing permanent backing plates for welding vehicle bodies, as disclosed in an embodiment of the present invention.

[0049] Figure 2 This is an exploded view of the structure of a device for positioning and pressing permanent backing plates for welding vehicle bodies, as disclosed in an embodiment of the present invention.

[0050] Figure 3 This is a diagram showing the working state of a device for positioning and pressing a permanent backing plate for welding a vehicle body, as disclosed in an embodiment of the present invention, and the matching state of the device with the profile and the permanent backing plate.

[0051] Figure 4 This is a diagram showing the working state of a device for positioning and pressing a permanent backing plate for welding a vehicle body, as disclosed in an embodiment of the present invention, and the fit between the device and the inner cavity of the profile.

[0052] Figure 5 for Figure 4 A magnified view of a portion of the image.

[0053] Explanation of reference numerals in the attached figures:

[0054] 10. Profile; 11. Inner cavity; 20. Permanent pad;

[0055] 1. Main frame; 2. Profile positioning and fixing components; 3. Linkage components; 4. Pad positioning structure; 5. Pins or rivets;

[0056] 101. Main base plate; 102. Main connecting parts;

[0057] 10201. Front part of the main body connector; 10202. Middle part of the main body connector; 10203. Rear part of the main body connector; 10204. Horizontal adjustment groove; 10205. Embedded groove;

[0058] 201. Screw; 202. Spring; 203. Profile forming top block; 204. Upper locking nut; 205. Lower locking nut;

[0059] 301. Connecting rod; 302. Main compression rod; 303. Secondary compression rod;

[0060] 30101, front part of the connecting rod; 30102, middle part of the connecting rod; 30103, rear part of the connecting rod;

[0061] 401. Positioning connecting rod; 402. Pad positioning block; 403. Protrusion. Detailed Implementation

[0062] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0063] See Figures 1 to 5 As shown;

[0064] This embodiment provides a device for positioning and clamping permanent backing plates used in vehicle body assembly welding. The positioning and clamping device includes:

[0065] Main framework 1;

[0066] A profile positioning and fixing component 2 is disposed on the front side of the main frame 1 and mates with the inner cavity 11 of the profile 10. The profile positioning and fixing component 2 abuts against the top of the inner cavity 11 of the profile 10 through the profile forming top block 203 at its upper end and maintains its relative position with the profile 11; and

[0067] The pad positioning structure 4 is set on the rear side of the main frame 1. The pad positioning structure 4 is used to press the permanent pad 20 and maintain the relative distance between the permanent pad 20 and the profile 10.

[0068] A linkage component 3 is provided between the profile positioning and fixing component 2 and the pad positioning structure 4. When the profile positioning and fixing component 2 is driven upward to abut the inner cavity 11 of the profile 10 through the linkage component 3, the linkage component 3 synchronously drives the pad positioning structure 4 to press down the permanent pad 20.

[0069] Specifically, this embodiment discloses a device capable of maintaining the relative position of the profile 10 and the permanent pad 20, while simultaneously lifting and abutting the inner cavity 11 of the profile 10 and pressing down and positioning the permanent pad 20. The device includes a main frame 1, a profile positioning and fixing component 2 that cooperates with the profile 10, and a pad positioning structure 4 that cooperates with the permanent pad 20. In this embodiment, a linkage component 3 is designed on the main frame 1 so that while the profile positioning and fixing component 2 is driven upward to flip and lift the inner cavity 11 of the profile 10, the permanent pad 20 is pressed down by driving the pad positioning structure 4, thereby maintaining the relative position of the permanent pad 20 and the profile 10.

[0070] See Figure 1 and Figure 2 As shown, firstly, this embodiment further defines the structure of the main frame 1, specifically: the main frame 1 of this embodiment includes a main base plate 101; and a main connector 102 fixed on the main base plate 101;

[0071] The profile positioning and fixing component 2 is movably connected to the front side of the main body connector 102 via the linkage component 3, and the pad positioning structure 4 is connected to the rear side of the main body connector 102.

[0072] Furthermore, based on the structure of the main frame 1 in this embodiment, and the placement positions of the profile positioning and fixing component 2, the pad positioning structure 4, and the linkage component 3, the linkage between the profile positioning and fixing component 2 and the pad positioning structure 4 in this embodiment is configured as follows:

[0073] When the linkage component 3 drives the profile positioning and fixing component 2 to flip upward and abut against the inner cavity 11 of the profile 10 through the profile forming top block 203, the linkage component 3 simultaneously presses the main body connector 102, so as to drive the pad positioning structure 4 to press the permanent pad 20 through the main body connector 102.

[0074] like Figure 1 and Figure 2 As shown, the main connector 102 in this embodiment is divided into a front part 10201, a middle part 10202, and a rear part 10203.

[0075] In this embodiment, the central part 10202 of the main connector is configured as a protruding structure, and the height of the connection between the protruding structure and the linkage component 3 is higher than that of other connection parts. Furthermore, a horizontal adjustment groove 10204 extending to the rear part 10203 of the main connector is machined at the lower part of the central part 10202, and multiple embedding grooves 10205 are machined at intervals in the horizontal adjustment groove 10204. In order to further adjust the relative distance between the permanent pad 20 and the profile 10 after positioning the profile 10, thereby improving the applicability and meeting different process requirements, this embodiment designs a horizontal adjustment groove 10204 in the main connector 102 and configures multiple embedding grooves 10205. The pad positioning structure 4 of this embodiment can adjust its extension length along the horizontal adjustment groove 10204 and can be embedded in any of the embedding grooves 10205 to fix the relative position of the permanent pad 20 and the profile 10.

[0076] In this embodiment, the linkage component 3 includes a connecting rod 301; and a pressure rod structure that is movably connected to both the connecting rod 301 and the main body connector 102 to drive the connecting rod 301 to swing.

[0077] Link 301 is divided into the front part 30101, the middle part 30102, and the rear part 30103;

[0078] The rear part 30103 of the connecting rod is rotatably connected to the middle part 10202 of the main body connecting piece by a pin, and the profile positioning and fixing assembly 2 is installed on the front part 30101 of the connecting rod.

[0079] The pressure bar structure is movably connected to the middle part 30102 of the connecting rod by a pin, and the pressure bar structure is also movably connected to the front part 10201 of the main body connector by a pin.

[0080] First, based on the structure of the linkage component 3, this embodiment further defines the connection structure between the profile positioning and fixing component 2 and the front part of the connecting rod 30101. Specifically, the front part of the connecting rod 30101 in this embodiment is configured as a long ring structure. The front part of the connecting rod 30101 of the long ring structure can serve as a slide for the profile positioning and fixing component 2, and adjust the horizontal position in the horizontal direction. It can also use the through hole of the long ring structure to meet the adjustment of the vertical position of the screw 201, thereby changing the height of the upper profile forming top block 203.

[0081] Specifically, the profile positioning and fixing component 2 in this embodiment includes:

[0082] A screw 201 passes through the through hole of the front part 30101 of the connecting rod, and a profile forming top block 203 is fixed at the upper end of the screw 201; and a locking nut structure is connected to the screw 201.

[0083] The screw 201 maintains its relative position with the front part of the connecting rod 30101 and the extension length of the upper end of the screw 201 through the locking nut structure.

[0084] More preferably, the locking nut structure of this embodiment includes an upper locking nut 204 and a lower locking nut 205. Both the upper locking nut 204 and the lower locking nut 205 are provided with a retainer that mates with the front part 30101 of the connecting rod, and the screw 201 is threadedly connected to both the upper locking nut 204 and the lower locking nut 205.

[0085] A spring 202 is fitted onto the screw 201.

[0086] First, in this embodiment, the profile positioning and fixing assembly 2 utilizes the screw 201 and the profile forming top block 203 to extend into the inner cavity 11 of the profile 10 and abut against the upper part of the inner cavity 11. Simultaneously, to adjust and position the screw 201 (which has horizontal and vertical position adjustments), the aforementioned upper locking nut 204 and lower locking nut 205 are designed. Both the upper and lower locking nuts are equipped with a retainer that mates with the front part 30101 of the connecting rod. When the upper locking nut 204 is adjusted upwards and the lower locking nut 205 is adjusted downwards, they are in an unlocked state. At this time, the screw 201 can be adjusted horizontally or vertically along the through hole of the elongated ring. After adjustment, only the upper and lower locking nuts need to be tightened.

[0087] Based on the fact that the inner cavity 11 of the profile 10 in the prior art is a triangular inner cavity, the profile forming top block 203 in this embodiment is configured as a triangular top block that matches the triangular inner cavity.

[0088] Preferably, the pressure bar structure of this embodiment includes a main pressure bar 302 and a secondary pressure bar 303 located inside the main pressure bar 302;

[0089] The lower part of the main pressure rod 302 is rotatably connected to the front part 10201 of the main body connector by a pin, and the middle part of the main pressure rod 302 is rotatably connected to the upper part of the auxiliary pressure rod 303 by a pin; the lower part of the auxiliary pressure rod 303 is rotatably connected to the middle part 30102 of the connecting rod by a pin.

[0090] During operation, when the main pressure rod 302 is pressed down on the rear side of the device, the main pressure rod 302 will drive the front end of the connecting rod 301 to swing upward through the auxiliary pressure rod 303, thereby driving the profile positioning and fixing assembly 2 to move upward and abut against the inner cavity 11 of the profile 10. At the same time, since the main pressure rod 302 has a downward pressing force, this downward pressing force will press down the main body connecting member 102, and simultaneously press down the pad positioning structure 4 by pressing down the main body connecting member 102. At this time, the operation of lifting the inner cavity 11 of the profile 10 and pressing down the permanent pad 20 is completed.

[0091] Preferably, the pad positioning structure 4 in this embodiment includes:

[0092] A positioning connecting rod 401, one end of which is disposed in any of the embedded slots 10205 of the horizontal adjustment slot 10204 of the main body connecting frame 102, and the other end extending toward the rear end of the main body frame 1; and

[0093] The pad positioning block 402 extends from the positioning connecting rod 401 to the rear end of the main frame 1 and is connected to the pad positioning block 402. The lower surface of the pad positioning block 402 has a protrusion 403 protruding downward, and the protrusion 403 matches the groove on the upper surface of the permanent pad 20.

[0094] The positioning connecting rod 401 can move along the horizontal adjustment groove 10204 to adjust the distance of the pad positioning block 402 relative to the main frame 1.

[0095] Since the groove on the permanent pad 20 extends along the length of the permanent pad 20, the tooling in this embodiment can adjust the relative position of the tooling and the permanent pad 20 along the length of the permanent pad 20 by the cooperation of the protrusion 403 and the groove.

[0096] In the above technical solution, the device for positioning and pressing permanent backing plates for vehicle body welding provided by the present invention has the following beneficial effects:

[0097] The present invention uses the positioning and clamping device of the permanent pad 20 to perform the pad positioning and welding operation, which can effectively ensure the consistency of the pad extension size requirements, and control the mating gap between the pad and the profile to ≤0.2mm through positioning and clamping.

[0098] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A device for positioning and clamping permanent backing plates used in vehicle body welding, characterized in that, The positioning and clamping device includes: Main framework (1); A profile positioning and fixing assembly (2) is disposed on the front side of the main frame (1) and cooperates with the inner cavity (11) of the profile (10). The profile positioning and fixing assembly (2) abuts against the top of the inner cavity (11) of the profile (10) through the profile forming top block (203) at its upper end and maintains a relative position with the profile (10); and The pad positioning structure (4) is set on the rear side of the main frame (1). The pad positioning structure (4) is used to press the permanent pad (20) and maintain the relative distance between the permanent pad (20) and the profile (10). A linkage component (3) is provided between the profile positioning and fixing component (2) and the pad positioning structure (4). When the profile positioning and fixing component (2) is driven upward to abut against the inner cavity (11) of the profile (10) by the linkage component (3), the linkage component (3) simultaneously drives the pad positioning structure (3) to press down the permanent pad (20).

2. The device for positioning and pressing permanent backing plates for welding vehicle bodies according to claim 1, characterized in that, The main framework (1) includes: Main base plate (101); and A main body connector (102) fixed to the main body base plate (101); The profile positioning and fixing component (2) is movably connected to the front side of the main body connector (102) through the linkage component (3), and the pad positioning structure (4) is connected to the rear side of the main body connector (102).

3. The device for positioning and pressing permanent backing plates for welding vehicle bodies according to claim 2, characterized in that, The linkage between the profile positioning and fixing component (2) and the pad positioning structure (4) is configured as follows: When the linkage component (3) drives the profile positioning and fixing component (2) to flip upward and abut against the inner cavity (11) of the profile (10) through the profile forming top block (203), the linkage component (3) simultaneously presses the main body connector (102) so that the pad positioning structure (4) presses the permanent pad (20) through the main body connector (102).

4. The device for positioning and pressing permanent backing plates for welding vehicle bodies according to claim 2, characterized in that, The main connector (102) is divided into a front part (10201), a middle part (10202), and a rear part (10203); The middle part (10202) of the main body connector is configured as a protruding structure, and the lower part of the middle part (10202) of the main body connector is machined with a horizontal adjustment groove (10204) extending to the rear part (10203) of the main body connector, and the horizontal adjustment groove (10204) is machined with a plurality of embedded grooves (10205) at intervals.

5. The device for positioning and pressing permanent backing plates for welding vehicle bodies according to claim 4, characterized in that, The linkage component (3) includes: Link (301); and A pressure rod structure that is movably connected to both the connecting rod (301) and the main body connector (102) to drive the connecting rod (301) to swing; The connecting rod (301) is divided into a front part (30101), a middle part (30102), and a rear part (30103); The rear part (30103) of the connecting rod is rotatably connected to the middle part (10202) of the main body connector by a pin, and the profile positioning and fixing assembly (2) is installed on the front part (30101) of the connecting rod; The pressure rod structure is movably connected to the middle part (30102) of the connecting rod by a pin, and the pressure rod structure is also movably connected to the front part (10201) of the main body connector by a pin.

6. The device for positioning and pressing permanent backing plates for welding vehicle bodies according to claim 5, characterized in that, The front part (30101) of the connecting rod is configured as a long circular ring structure; The profile positioning and fixing assembly (2) includes: A screw (201) passing through a through hole in the front part (30101) of the connecting rod, the upper end of the screw (201) being fixed with the profile forming top block (203); and A locking nut structure connected to the screw (201); The screw (201) is maintained in relative position with the front part of the connecting rod (30101) and the extension length of the upper end of the screw (201) by the locking nut structure.

7. The device for positioning and pressing permanent backing plates for welding vehicle bodies according to claim 6, characterized in that, The locking nut structure includes an upper locking nut (204) and a lower locking nut (205). Both the upper locking nut (204) and the lower locking nut (205) are provided with a retainer that cooperates with the front part (30101) of the connecting rod, and the screw (201) is threadedly connected to both the upper locking nut (204) and the lower locking nut (205). A spring (202) is fitted onto the screw (201).

8. The device for positioning and pressing permanent backing plates for welding vehicle bodies according to claim 6, characterized in that, The inner cavity (11) of the profile (10) is a triangular inner cavity, and the profile forming top block (203) is configured as a triangular top block that matches the triangular inner cavity.

9. A device for positioning and pressing a permanent backing plate for welding a vehicle body, as described in claim 5 or 6, characterized in that, The pressure bar structure includes: The main pressure bar (302) and the secondary pressure bar (303) located inside the main pressure bar (302); The lower part of the main pressure rod (302) is rotatably connected to the front part (10201) of the main body connector by a pin, and the middle part of the main pressure rod (302) is rotatably connected to the upper part of the auxiliary pressure rod (303) by a pin. The lower part of the auxiliary pressure rod (303) is rotatably connected to the middle part of the connecting rod (30102) by a pin.

10. The device for positioning and pressing a permanent backing plate for welding a vehicle body according to claim 4, characterized in that, The pad positioning structure (4) includes: A positioning connecting rod (401) with one end disposed in any of the embedding slots (10205) of the horizontal adjustment slot (10204) of the main body connecting frame (102) and the other end extending toward the rear end of the main body frame (1); and A pad positioning block (402) extends from the positioning connecting rod (401) to one end of the rear end of the main frame (1). The lower surface of the pad positioning block (402) has a protrusion (403) that matches the groove on the upper surface of the permanent pad (20). The positioning connecting rod (401) can move along the horizontal adjustment groove (10204) to adjust the distance of the pad positioning block (402) relative to the main frame (1).

Images