New CMT Welding Cooling Fixture for Automobiles

Abstract

The present invention discloses a novel CMT welding cooling fixture for automobiles, comprising: a base, a flip mechanism, a support seat and a clamping block; the flip mechanism is fixed to the base; a plurality of support seats are fixed to the base; the clamping block is fixedly mounted on the support seat, and is used to clamp a workpiece with the flip mechanism; the clamping block is provided with a heat dissipation structure, and the heat dissipation structure is used to dissipate heat from the workpiece during CMT welding; the present invention solves the problems of heat waves and heat pits caused by poor heat dissipation of the CMT welding fixture, especially poor heat dissipation of the clamping block, improves the aesthetics of the exposed CMT weld bead of the automobile, and eliminates defects caused by poor heat dissipation in the welded white body.

Description

Technical Field

[0001] The present invention relates to the field of welding technology, in particular to a novel CMT welding cooling fixture for automobiles. Background Art

[0002] At present, cold technology transition welding technology (CMT) is widely used in automobile body welding technology, especially in exposed areas such as the connection between the rear water tank and the side outer panel of the automobile. Its flatness and aesthetics after welding will directly affect customers' perception of the appearance and quality evaluation of the car. In order to make the exposed welds of the car body smooth and beautiful, it is usually necessary to set a copper block or other fast heat dissipation device at the corresponding position of the fixture. However, the existing copper block and other technical solutions mainly utilize the principle of good thermal conductivity of copper, but are affected by the structural space of the fixture. The copper block's thermal conductivity and heat dissipation have defects such as insufficient heat dissipation capacity, which will lead to insufficient heat dissipation, resulting in heat accumulation in the outer panel area, thereby causing defects such as heat waves and heat pits on the surface of the outer panel due to thermal effects, affecting users' perception of the car's aesthetics. Summary of the Invention

[0003] The object of the present invention is to provide a novel CMT welding cooling fixture for automobiles to solve the problems raised in the above background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solutions: a novel CMT welding cooling fixture for automobiles, comprising:

[0005] base;

[0006] A turning mechanism, wherein the turning mechanism is fixed on the base;

[0007] A plurality of support bases, wherein the plurality of support bases are fixed on the base;

[0008] A clamping block is fixedly mounted on the support seat, and is used to clamp the workpiece with the flip mechanism. The clamping block is provided with a heat dissipation structure, and the heat dissipation structure is used to dissipate heat from the workpiece during CMT welding.

[0009] Furthermore, the base includes:

[0010] Support footing;

[0011] A base body, wherein the supporting feet are connected to the base body;

[0012] A weight-reducing hole is provided on the base body.

[0013] Furthermore, the flipping mechanism includes:

[0014] A mounting seat, wherein the flip mechanism is connected to the base via the mounting seat;

[0015] A turning cylinder, the turning cylinder comprising a cylinder seat, the cylinder seat being connected to the base, and the cylinder seat being connected to the cylinder body of the turning cylinder;

[0016] a connecting frame connected to the mounting seat;

[0017] A flipping pressure head is connected to the connecting frame, and the flipping pressure head includes a pressure head. The pressure head is made of a copper alloy with good thermal conductivity. The pressure head is arranged opposite to the clamping block. The flipping cylinder drives the flipping mechanism to enable the flipping pressure head and the clamping block to clamp the workpiece.

[0018] Furthermore, the support base includes:

[0019] a supporting base connected to the base;

[0020] a support column connected to the support base;

[0021] A connecting plate, the connecting plate is L-shaped and includes a vertical portion and a horizontal portion, the horizontal portion is connected to the support column, and the vertical portion is connected to the clamping block;

[0022] An adjusting gasket is arranged between the supporting column and the connecting plate.

[0023] Furthermore, the clamping block includes:

[0024] a heat dissipation structure, wherein the heat dissipation structure is provided with a flow channel and a connection hole, the flow channel is provided inside the heat dissipation structure, and the flow channel is connected to an external cooling system through the connection hole;

[0025] The fixing portion is connected to the support seat via the fixing portion.

[0026] The material of the clamping block is copper alloy.

[0027] Furthermore, the connection framework includes:

[0028] A flip connection portion, wherein the flip connection portion is provided with a rotating seat;

[0029] The turning body, the rotating seat is rotatably connected to the turning body;

[0030] A flip arm, one end of which is connected to the flip body, and the other end of which is provided with a cylinder connecting seat;

[0031] The flip cylinder has a piston rod, the end of the piston rod is connected to the cylinder connecting seat, and the piston rod drives the flip body to rotate with the rotating seat as the axis through the flip arm.

[0032] Furthermore, the rotating seat includes an upper rotating seat and a lower rotating seat, which are arranged relative to each other and are coaxial, and the flip body is rotatably connected to the upper rotating seat and the lower rotating seat respectively, and can rotate along the axis between the upper rotating seat and the lower rotating seat.

[0033] Furthermore, the flip body includes a pressure head seat, and the pressure head seat is connected to the flip pressure head.

[0034] Furthermore, the flipping mechanism also includes a proximity switch, which is arranged opposite to the flip arm. The proximity switch has an abutment position close to the flip arm, and a separation position separated from the flip arm. When the flip arm rotates to the abutment position, the proximity switch abuts against the flip arm, controlling the flip cylinder to stop working.

[0035] Furthermore, the flipping mechanism further comprises:

[0036] a buffer, the buffer comprising a threaded end and a buffer end;

[0037] a buffer seat, the buffer seat being mounted on the mounting seat and connected to the threaded end;

[0038] The buffer end is arranged opposite to the flip arm, and the buffer end has a buffer position close to the flip arm, and a separation position separated from the flip arm. When the flip arm rotates to the buffer position, the buffer end abuts against the flip arm, causing it to gradually slow down until it stops moving.

[0039] Compared with the prior art, the present invention has the following beneficial effects: it solves the problems of heat waves and heat pits caused by poor heat dissipation of CMT welding fixtures, especially poor heat dissipation of the clamping block, improves the aesthetics of the exposed CMT welds of the car, and eliminates the defects caused by poor heat dissipation of the welded white body. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a schematic diagram of the structural connection of a novel CMT welding cooling fixture for automobiles according to an embodiment of the present invention;

[0041] Figure 2 This is a schematic diagram of the base structure connection in an embodiment of the present invention;

[0042] Figure 3 This is a schematic diagram of the connection structure of the flip mechanism in an embodiment of the present invention;

[0043] Figure 4 This is another structural connection diagram of the flip mechanism in an embodiment of the present invention;

[0044] Figure 5This is a schematic diagram of the connection between the base, the flip mechanism, the support base and the clamping block structure in an embodiment of the present invention;

[0045] Figure 6 In the embodiment of the present invention Figure 5 A schematic diagram of the enlarged structural connection of part A;

[0046] Figure 7 This is a schematic diagram of the connection between the support base and the clamping block structure in an embodiment of the present invention;

[0047] Figure 8 This is a schematic diagram of the clamping block structure in an embodiment of the present invention;

[0048] Figure 9 A side view of a clamping block in an embodiment of the present invention;

[0049] Figure 10 In the embodiment of the present invention Figure 9 AA cross-sectional view;

[0050] In the figure: 100, base; 200, turning mechanism; 300, support base; 400, clamping block; 110, supporting foot; 120, base body; 210, mounting base; 220, turning cylinder; 230, connecting frame; 240, turning pressure head; 250, buffer; 260, buffer seat; 270, proximity switch; 310, supporting base; 320, supporting column; 330, connecting plate; 340, adjusting gasket; 410, heat dissipation structure; 420, fixing part; 121, weight-reducing hole; 221, cylinder seat; 231, flip connection part; 232, flip body; 233, flip arm; 241, pressure head; 251, threaded end; 252, buffer end; 331, vertical part; 332, horizontal part; 411, flow channel; 412, connecting hole; 2311, rotating seat; 2321, pressure head seat; 2331, cylinder connecting seat; 23111, upper rotating seat; 23112, lower rotating seat. DETAILED DESCRIPTION

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0052] In the description of the present invention, unless otherwise specified, "plurality" means two or more; terms such as "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," and "tail" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0054] Please refer to the accompanying drawings of the specification. The present invention provides a technical solution: a new type of CMT welding cooling fixture for automobiles, comprising:

[0055] base 100;

[0056] A turning mechanism 200 , wherein the turning mechanism 200 is fixed on the base 100 ;

[0057] A plurality of support bases 300 , wherein the plurality of support bases 300 are fixed on the base 100 ;

[0058] The clamping block 400 is fixedly mounted on the support base 300 and is used to clamp the workpiece with the flip mechanism 200. The clamping block 400 is provided with a heat dissipation structure 410, which is used to dissipate heat from the workpiece during CMT welding.

[0059] In the above embodiment, the base 100 is used to support and install the flip mechanism 200 and the support base 300. Preferably, its thickness is not less than 30 mm and the overall flatness is not higher than 0.1 mm. The base 100 is connected to all other connecting mechanisms with bolts and pins.

[0060] Optionally, the base 100 includes:

[0061] Supporting footing 110;

[0062] A base body 120, wherein the support feet 110 are connected to the base body 120;

[0063] The weight-reducing hole 121 is formed on the base body 120 .

[0064] In the above embodiment, the base body 120 is connected to the supporting foot 110 by welding to ensure strength, and the flatness of the base body 120 has high requirements, generally less than 0.1 mm, and the weight-reducing holes 121 need to be arranged accordingly according to the actual load-bearing conditions.

[0065] Optionally, the flipping mechanism 200 includes:

[0066] A mounting base 210, through which the flip mechanism 200 is connected to the base 100;

[0067] A turning cylinder 220, wherein the turning cylinder 220 includes a cylinder seat 221, wherein the cylinder seat 221 is connected to the base 100, and the cylinder seat 221 is connected to the cylinder body of the turning cylinder 220;

[0068] A connecting frame 230 connected to the mounting base 210;

[0069] The flipping press head 240 is connected to the connecting frame 230. The flipping press head 240 includes a press head 241. The material of the press head 241 is a copper alloy with good thermal conductivity. The press head 241 is arranged opposite to the clamping block 400. The flipping cylinder 220 drives the flipping mechanism 200 to enable the flipping press head 240 and the clamping block 400 to clamp the workpiece.

[0070] In the above embodiment, the flip mechanism 200 is used for workpiece clamping, positioning, and heat dissipation. The flip mechanism 200 is driven by a flip cylinder 220, which serves as the power structure of the flip mechanism 200. Compressed air is connected to the flip mechanism 200 to drive the entire mechanism 200. Its model needs to be determined through calculation. The clamping head 241 is made of a copper alloy with high thermal conductivity. The flip mechanism 200 is connected to the base 100 via bolts, and the structure of the connecting frame 230 is determined by the vehicle body design. The flip head 240 is used to compress the sheet metal gap, effectively controlling the gap to less than 0.5 mm. The head 241 is made of a copper alloy with good thermal conductivity. Preferably, the effective width of the head 241 is greater than or equal to 15 mm, and the thickness is greater than or equal to 6 mm. Its length is determined by the CMT weld bead and cannot be less than the weld bead length. This allows for rapid heat dissipation, effectively reducing the probability of thermal waves and heat pits.

[0071] Optionally, the support base 300 includes:

[0072] A support base 310 , wherein the support base 310 is connected to the base 100 ;

[0073] A support column 320 , wherein the support column 320 is connected to the support base 310 ;

[0074] The connecting plate 330 is L-shaped and includes a vertical portion 331 and a horizontal portion 332 . The horizontal portion 332 is connected to the support column 320 , and the vertical portion 331 is connected to the clamping block 400 .

[0075] The adjusting gasket 340 is disposed between the supporting column 320 and the connecting plate 330 .

[0076] In the above embodiment, the support base 300 is used for the installation and positioning of the fixture positioning surface and the clamping block 4004;

[0077] The support seat 300 is connected to the base 100 by bolts; the support column 320 plays a supporting and fixing role; the adjustment gasket 340 can adjust the positioning accuracy; the connecting plate 330 is a connecting L-plate used to support and connect the clamping block 400.

[0078] Optionally, the clamping block 400 includes:

[0079] A heat dissipation structure 410 is provided with a flow channel 411 and a connection hole 412. The flow channel 411 is provided inside the heat dissipation structure 410 and is connected to an external cooling system through the connection hole 412.

[0080] The fixing portion 420 , through which the clamping block 400 is connected to the supporting base 300 .

[0081] The clamping block 400 is made of copper alloy.

[0082] In the above embodiment, the clamping block 400 is used to cooperate with the flipping mechanism 200 for clamping, positioning and heat dissipation. After the two cooperate, the gap between the two overlapped sheet metals of the vehicle body can be controlled to less than 0.5 mm. The material is copper alloy, which has the characteristics of good heat dissipation. It can quickly dissipate heat after effective contact with the vehicle body sheet metal, and play a supporting and clamping positioning role. The clamping block 400 adds a process connection hole 412 and an internal flow channel 411. The heat dissipation efficiency can be greatly increased by adding a water pipe or a compressed air pipe, and the heat wave and heat pit problems caused by the CMT welding technology can be effectively eliminated by rapid heat dissipation; the flow channel 411 can be connected to two cooling structures through the connection hole 412. The first is a water cooling method, which can effectively accelerate heat dissipation by connecting to cooling circulating water. When connecting to a water cooling structure, preferably, the diameter of the connection hole 412 is required to be between φ5-10, which needs to be based on the effective size of the clamping block 400. The cooling water pressure is between 0.1-0.4MPa. This cooling water can directly use the cooling water used by the welding tongs in the body welding workshop, maximizing the use of existing or idle resources in the workshop; the second is air cooling, which can effectively dissipate heat by connecting compressed air. When using air cooling, the diameter of the connection hole 412 is required to be between φ5-15, which needs to be determined according to the effective size of the clamp 400. The compressed air pressure is between 0.1-0.6MPa. The compression control can directly use the compressed air used by the compression cylinder of the clamp itself or the exhaust gas discharged when the cylinder is opened or closed, maximizing the use of existing resources or wasting resources, and according to the air pressure, a silencer and other devices can be appropriately added to avoid noise during gas release; the contact surface width of the clamp 400 and the outer surface of the body is greater than or equal to 15mm, the thickness is greater than or equal to 20mm, and the length is determined according to the CMT weld bead and cannot be less than the weld bead length.

[0083] Optionally, the connection frame 230 includes:

[0084] The flip connection part 231 is provided with a rotating seat 2311;

[0085] The turning body 232, the rotating seat 2311 is rotatably connected to the turning body 232;

[0086] A flip arm 233, one end of which is connected to the flip body 232, and the other end of which is provided with a cylinder connection seat 2331;

[0087] The flip cylinder 220 has a piston rod, the end of which is connected to the cylinder connecting seat 2331 . The piston rod drives the flip body 232 to rotate around the rotating seat 2311 via the flip arm 233 .

[0088] Optionally, the rotating seat 2311 includes an upper rotating seat 23111 and a lower rotating seat 23112, and the upper rotating seat 23111 and the lower rotating seat 23112 are arranged relative to each other and are coaxial, and the flip body 232 is rotatably connected to the upper rotating seat 23111 and the lower rotating seat 23112 respectively, and can rotate along the axis between the upper rotating seat 23111 and the lower rotating seat 23112.

[0089] In the above embodiment, the upper rotating seat 23111 and the lower rotating seat 23112 are arranged at intervals and coaxially relative to each other, which can increase the stability of the flip body 232.

[0090] Optionally, the flip body 232 includes a pressure head seat 2321 , and the pressure head seat 2321 is connected to the flip pressure head 240 .

[0091] Optionally, the flipping mechanism 200 further includes a proximity switch 270, which is arranged opposite to the flip arm 233. The proximity switch 270 has an abutment position close to the flip arm 233, and a separation position separated from the flip arm 233. When the flip arm 233 rotates to the abutment position, the proximity switch 270 abuts against the flip arm 233, controlling the flip cylinder 220 to stop working.

[0092] In the above embodiment, the proximity switch 270 controls the flip cylinder 220 to stop working, making the new automotive CMT welding cooling fixture safer and more reliable, and improving work efficiency.

[0093] Optionally, the flipping mechanism 200 further includes:

[0094] The buffer 250 includes a threaded end 251 and a buffer end 252;

[0095] A buffer seat 260 , the buffer seat 260 is mounted on the mounting seat 210 , and the buffer seat 260 is connected to the threaded end 251 ;

[0096] The buffer end 252 is arranged opposite to the flip arm 233. The buffer end 252 has a buffer position close to the flip arm 233, and a separation position separated from the flip arm 233. When the flip arm 233 rotates to the buffer position, the buffer end 252 abuts against the flip arm 233, causing it to gradually slow down until it stops moving.

[0097] In the above embodiment, the buffer 250 makes the new automotive CMT welding cooling fixture safer and more reliable, and prevents the flipping mechanism 200 from hard collision with the device and damaging the device.

[0098] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A new type of CMT welding cooling fixture for automobiles, characterized by: include: base (100); a turning mechanism (200), wherein the turning mechanism (200) is fixed on the base (100); A plurality of support bases (300), wherein the plurality of support bases (300) are fixed on the base (100); a clamping block (400), the clamping block (400) being fixedly mounted on the support seat (300), the clamping block (400) being used to clamp a workpiece with the flipping mechanism (200), the clamping block (400) being provided with a heat dissipation structure (410), the heat dissipation structure (410) being used to dissipate heat from the workpiece during CMT welding; Wherein, the turning mechanism (200) comprises: a mounting seat (210), wherein the flip mechanism (200) is connected to the base (100) via the mounting seat (210); A turning cylinder (220), the turning cylinder (220) comprising a cylinder seat (221), the cylinder seat (221) being connected to the base (100), and the cylinder seat (221) being connected to a cylinder body of the turning cylinder (220); a connecting frame (230), the connecting frame (230) being connected to the mounting seat (210); A flipping pressure head (240), the flipping pressure head (240) is connected to the connecting frame (230), the flipping pressure head (240) comprises a pressure head (241), the pressure head (241) is made of a copper alloy with good thermal conductivity, the pressure head (241) and the clamping block (400) are arranged opposite to each other, and the flipping cylinder (220) drives the flipping mechanism (200) to enable the flipping pressure head (240) and the clamping block (400) to clamp the workpiece; The connection frame (230) comprises: A flip connection portion (231), wherein the flip connection portion (231) is provided with a rotating seat (2311); A turning body (232), wherein the rotating seat (2311) is rotatably connected to the turning body (232); A flip arm (233), one end of the flip arm (233) is connected to the flip body (232), and the other end of the flip arm (233) is provided with a cylinder connection seat (2331); The flip cylinder (220) has a piston rod, the end of which is connected to the cylinder connecting seat (2331). The piston rod drives the flip body (232) to rotate around the rotating seat (2311) via the flip arm (233).

2. A novel CMT welding cooling fixture for automobiles according to claim 1, characterized in that: The base (100) comprises: Supporting footing (110); A base body (120), wherein the supporting feet (110) are connected to the base body (120); A weight-reducing hole (121), wherein the weight-reducing hole (121) is provided on the base body (120).

3. The novel CMT welding cooling fixture for automobiles according to claim 1 is characterized in that: The support base (300) comprises: a supporting base (310), the supporting base (310) being connected to the base (100); A support column (320), the support column (320) being connected to the support base (310); A connecting plate (330), the connecting plate (330) is L-shaped and includes a vertical portion (331) and a horizontal portion (332), the horizontal portion (332) is connected to the support column (320), and the vertical portion (331) is connected to the clamping block (400); An adjusting gasket (340) is provided between the supporting column (320) and the connecting plate (330).

4. The novel CMT welding cooling fixture for automobiles according to claim 1 is characterized in that: The clamping block (400) comprises: A heat dissipation structure (410), the heat dissipation structure (410) comprising a flow channel (411) and a connection hole (412), the flow channel (411) being arranged inside the heat dissipation structure (410), and the flow channel (411) being connected to an external cooling system through the connection hole (412); A fixing portion (420), wherein the clamping block (400) is connected to the supporting seat (300) via the fixing portion (420); The material of the clamping block (400) is copper alloy.

5. The novel CMT welding cooling fixture for automobiles according to claim 1 is characterized in that: The rotating seat (2311) includes an upper rotating seat (23111) and a lower rotating seat (23112). The upper rotating seat (23111) and the lower rotating seat (23112) are arranged relative to each other and are coaxial. The flip body (232) is rotatably connected to the upper rotating seat (23111) and the lower rotating seat (23112) respectively, and can rotate along the axis between the upper rotating seat (23111) and the lower rotating seat (23112).

6. The novel CMT welding cooling fixture for automobiles according to claim 1 is characterized in that: The flip body (232) includes a pressure head seat (2321), and the pressure head seat (2321) is connected to the flip pressure head (240).

7. The novel CMT welding cooling fixture for automobiles according to claim 1 is characterized in that: The flip mechanism (200) further includes a proximity switch (270), which is arranged opposite to the flip arm (233). The proximity switch (270) has an abutting position close to the flip arm (233) and a separation position separated from the flip arm (233). When the flip arm (233) rotates to the abutting position, the proximity switch (270) abuts against the flip arm (233), thereby controlling the flip cylinder (220) to stop working.

8. The novel CMT welding cooling fixture for automobiles according to claim 1 is characterized in that: The turning mechanism (200) further comprises: A buffer (250), the buffer (250) comprising a threaded end (251) and a buffer end (252); a buffer seat (260), the buffer seat (260) being mounted on the mounting seat (210), the buffer seat (260) being connected to the threaded end (251); The buffer end (252) is arranged opposite to the flip arm (233), and the buffer end (252) has a buffer position close to the flip arm (233), and a separation position separated from the flip arm (233). When the flip arm (233) rotates to the buffer position, the buffer end (252) abuts against the flip arm (233), causing it to gradually slow down until it stops moving.

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