CN113463162B - Workpiece positioning device for frame electrophoresis plastic spraying and using method thereof - Google Patents

Abstract

The invention relates to the technical field of frame spraying equipment of electric vehicles, in particular to a workpiece positioning device for frame electrophoresis spraying and a using method thereof.

Description

A workpiece positioning device for frame electrophoresis spraying and its use method

technical field

The invention relates to the technical field of plastic spraying equipment for electric vehicle frames, in particular to a workpiece positioning device for electrophoretic plastic spraying of a frame and a method for using the same.

Background technique

Electric vehicles, that is, electric drive vehicles, also known as electric drive vehicles, electric vehicles are divided into AC electric vehicles and DC electric vehicles. Generally speaking, electric vehicles use batteries as energy sources, and convert electrical energy into mechanical energy through controllers, motors and other components. Vehicles that change the speed by controlling the current, and with the development of modern society, electric vehicles are very popular due to their environmental protection, lightness, and low cost of use, and more and more people will choose to use electric vehicles, and Now some shared electric bicycles are also appearing more and more in people's lives, and the frame of the electric bicycle is the installation base of each assembly of the electric bicycle (similar to the skeleton of the human body), which combines the motor with the body and other assemblies. Connecting them into an organic whole means that each assembly will form a complete electric vehicle.

The frame of the electric vehicle mainly includes the main frame, the rear fork, the middle support, the side support, the rear shelf, the handlebar and other components. The frame of the car is treated with anti-rust treatment. Commonly used in the market are powder spraying treatment and electrophoresis treatment. The former is relatively simple but easy to peel off the paint and has poor anti-rust ability. The latter has an anti-rust effect for at least 5 years. , The method of simple identification from the appearance can be scratched with a knife, the electrophoretic adhesion is better and the bottom layer will not be exposed, and the powder spraying will reveal the true color of the steel. However, for electrophoresis on the frame, a conveying device is often used to hoist the frame on the conveyor device, and then go through the electrophoresis tank to perform electrophoresis on the frame. However, when in use, when hoisting and positioning, screws are often used to fix the frame on the hoisting equipment, and then electrophoresis is performed. However, when in use, there are installation problems. It is cumbersome and has poor versatility when used. Different types of frames need to use different hoisting positioning parts for electrophoresis, which is inconvenient to use, and it is more troublesome and cumbersome when installing and disassembling, and it is not convenient for the frame The use of electrophoresis positioning greatly affects the processing efficiency.

Contents of the invention

The object of the present invention is to provide a workpiece positioning device for frame electrophoretic spraying and its use method, to solve the inconvenient installation and disassembly of the frame and the positioning device and the inconvenient positioning of different types of workpieces proposed in the background technology. The use of the frame affects the processing efficiency.

In order to achieve the above object, the present invention provides the following technical solutions: a workpiece positioning device for frame electrophoresis spray molding, including a hanging plate and a connecting frame, and hanging ropes are evenly fixed on both sides of the upper surface of the hanging plate, and the The other end of the suspension rope is fixedly connected to the middle position of the lower surface of the connecting frame, the connecting frame is a U-shaped structure, the inner upper end of the connecting frame is rotatably installed with a rolling shaft, and the lower ends of both sides of the hanging plate The lifting device is evenly slid and clamped, the lower end of the lifting device is fixedly installed with a fixed frame, and the fixed frame is a U-shaped structure, the inner part of the fixed frame is slidably connected with a supporting device, and the upper end of the supporting device One side is fixedly connected with the lower end of the lifting device.

Preferably, in order to facilitate the lateral movement of the lifting device on the hanging plate, transverse grooves are provided on both sides of the hanging plate, and the transverse grooves are cross-shaped, and the lifting device is slidably clamped on the the interior of the transverse groove.

Preferably, in order to facilitate the fixed connection between the lifting device and the hanging plate and avoid the movement of the lifting device, threaded holes are evenly opened around the upper end of the lifting device, and the insides of the threaded holes are all threaded. A locking screw is connected, one end of the locking screw is in contact with the upper surface of the hanging plate, and the lifting device is composed of a moving block, a brushless motor, a threaded ring, and a screw rod, and the brushless motor is an automatic Lock-type brushless motor, and the moving block is a king-shaped structure, the lifting device is slid and clamped inside the horizontal groove on the suspension plate through the moving block, and the middle position of the moving block is vertical A through hole is provided directly, and the screw rod is inserted into the inside of the through hole, and the lower end of the screw rod extends to the inside of the fixed frame to be fixedly connected with the support device, and the lifting device connects with the support device through the screw rod. The supporting device is fixedly connected, and the brushless motor is fixedly installed on the upper surface of the moving block, the threaded ring is fixedly installed at the inner middle position of the brushless motor, and the threaded ring is connected with the The screw rods are threadedly connected.

Preferably, in order to facilitate the connection between the support device and the lifting device, and facilitate the support, positioning and fixing of the vehicle frame by the support device, a fixing ring is fixedly installed on one side of the upper surface of the support device, and the lifting The lower end of the device is fixedly installed on the upper surface of the fixed ring, and the lifting device is fixedly connected with the supporting device through the fixing ring. The supporting device is composed of a motor, a lifting block, a threaded rod, a supporting rod, and a guide Composed of rods, the lifting block is slidingly clamped inside the vertical groove, and the fixing ring is fixedly installed in the middle of the upper surface of the lifting block, and the supporting device passes through the lifting block and the lifting block. The device is fixedly connected, the motor is fixedly installed on one side of the lifting block, and the protective cover is fixedly installed on one side of the lifting block, the motor is located inside the protective cover, and the threaded rod Fixedly installed on the output end of the motor, the threaded rod runs through the lifting block and extends to the other side of the lifting block, and a threaded blind hole is opened on one side of the supporting rod, and the threaded rod One end of the rod is threadedly connected with the threaded blind hole, the guide rod is fixedly installed on one side of the lifting block, and the number of the guide rods is four, and one side of the support rod is uniformly provided with four a guide hole, the guide rod is plugged into the guide hole, and one side of the outer surface of the support rod is coated with a wear-resistant pad.

Preferably, in order to facilitate the electrical control of the present invention and facilitate the electrophoresis operation of the present invention, a control box is fixedly installed in the middle of the upper surface of the suspension plate, and the control box is electrically connected to the lifting device and the support device, the control box is composed of a box body, a battery, a balance sensing module, a wireless communication module and a single-chip microcomputer, and the battery, the balance sensing module, the wireless communication module and the single-chip microcomputer are all fixedly installed in the box The inside of the body, and the wireless communication module is electrically connected to the single-chip microcomputer, the single-chip motor is electrically connected to the brushless motor and the motor, and the storage battery is respectively the balance induction module, the wireless communication module, The single-chip microcomputer, the brushless motor and the electric motor are powered, and the balance sensing module is electrically connected to the single-chip microcomputer.

Preferably, in order to protect the motor during electrophoresis, a protective cover is fixedly installed on one side of the supporting device, and the electrical appliances inside the supporting device are located inside the protective cover.

Preferably, in order to facilitate the support device to move up and down inside the fixed frame, vertical grooves are vertically opened on both sides inside the fixed frame, the vertical grooves are T-shaped structures, and the support The device is slidingly engaged in the vertical slot.

Preferably, a method for using a workpiece positioning device for frame electrophoresis plastic spraying is as follows: step 1, the present invention is rotationally connected with the transmission device at the upper end of the external electrophoresis tank through the rolling shaft at the upper end of the connecting frame, so that the The hanging plate is hoisted on the external transmission.

Step 2. Adjust the position of the lifting device on the hanging plate according to the shape of the frame that requires electrophoresis, so that the lifting device slides inside the transverse groove to move the supporting device.

Step 3. After moving to a suitable position, turn the locking screw on the lifting device, so that one end of the locking screw is pressed against the upper surface of the hanging plate, and then the lifting device Fix on the hanging board to fix the supporting device.

Step 4. Adjust the height of the supporting device according to the positions and heights of the middle support bracket, middle support bracket and tailpipe of the vehicle frame that needs electrophoresis. When adjusting, the lifting device is driven by opening the lifting device The support means moves inside the vertical slot.

Step 5. Place the vehicle frame that needs electrophoresis between the fixed frames, and open the support device through the control box, so that one end of the support device protrudes and extends into the interior of the vehicle frame. The vehicle frame is supported, and different positions of the vehicle frame are supported by a plurality of supporting devices, so as to realize the positioning and fixing of the vehicle frame.

Step 6, the external transmission device drives the connecting frame to move, so that the present invention moves, and then the frame moves to the inside of the external electrophoresis tank, and the frame is subjected to electrophoretic plastic spraying.

Step 7: After the vehicle frame is finished with electrophoresis spraying and transported out of the electrophoresis tank, one end of the support device is retracted by closing the support device, so that the vehicle frame is taken out from the inside of the fixing frame.

Technical effect and advantage of the present invention:

1. In the present invention, by installing a plurality of support devices, the vehicle frame is mounted on the support rods on the support device, which facilitates the fixed positioning of the vehicle frame and the electrophoresis of the vehicle frame.

2. The present invention controls the extension and retraction of the support rod through the motor, thereby facilitating the extension and retraction of the support rod into the interior of the vehicle frame, facilitating the fixing of the vehicle frame, and further facilitating the fixing of the vehicle frame on the vehicle frame. Inventive and easy to remove the frame from the invention, easy to operate.

3. The present invention facilitates the adjustment of the horizontal distance and vertical height of the supporting device through the lifting device, and is convenient for use with different types of vehicle frames, and has strong versatility.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present invention.

Fig. 2 is a schematic diagram of the hanging plate in the structure of the present invention.

Fig. 3 is a three-dimensional front sectional view of the hanging plate in the structure of the present invention.

Fig. 4 is a structural schematic diagram of the lifting device in the structure of the present invention.

Fig. 5 is a partial enlarged view of A in the structure of the present invention.

Fig. 6 is a structural schematic diagram of the supporting device in the structure of the present invention.

Fig. 7 is a structural schematic diagram of the support rod in the structure of the present invention.

Fig. 8 is a schematic structural diagram of a moving block in the structure of the present invention.

In the figure: 1, hanging plate; 2, connecting frame; 3, hanging rope; 4, rolling shaft; 5, lifting device; 6, fixed frame; 7, supporting device; 8, transverse groove; 9, threaded hole; Locking screw; 11, fixed ring; 12, control box; 13, protective cover; 14, vertical slot; 15, moving block; 16, brushless motor; 17, threaded ring; 18, screw rod; 19, through hole ;20, motor; 21, lifting block; 22, threaded rod; 23, support rod; 24, guide rod; 25, threaded blind hole; 26, guide hole; 27, wear-resistant pad; 28, box body; 29, battery ; 30. Balance sensing module; 31. Wireless communication module; 32. Single-chip microcomputer.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Referring to Figures 1-8, the present invention provides a technical solution:

A workpiece positioning device for frame electrophoretic spray molding and its use method, comprising a hanging plate 1 and a connecting frame 2, hanging ropes 3 are evenly fixed on both sides of the upper surface of the hanging plate 1, and the other end of the hanging rope 3 is connected to the The middle position of the lower surface of the frame 2 is fixedly connected, the connecting frame 2 is a U-shaped structure, the inner upper end of the connecting frame 2 is rotated and installed with a rolling shaft 4, and the lower ends of both sides of the hanging plate 1 are evenly slid and clamped with a lifting device 5, lifting The lower end of the device 5 is fixedly installed with a fixed frame 6, and the fixed frame 6 is a U-shaped structure, the inside of the fixed frame 6 is slidingly connected with a support device 7, and the upper end side of the support device 7 is fixedly connected with the lower end of the lifting device 5 , when in use, the present invention is connected to the external transmission device through the connecting frame 2, and the vehicle frame is placed between the fixed frames 6, and the position of the supporting device 7 is adjusted according to the shape of the vehicle frame, and the lifting device 5 Moving on the suspension plate 1 facilitates the adjustment of the lateral position of the support device 7. The height of the support device 7 is conveniently adjusted by the lifting device 5. By opening the support device 7, the support rod 23 is stretched out, so that the support rod 23 is inserted Connected to the inside of the vehicle frame, it is convenient to fix and position the vehicle frame, and then when the external transmission device drives the connecting frame 2 to move, the vehicle frame is moved, thereby facilitating the electrophoresis processing of the vehicle frame.

As a technical optimization scheme of the present invention, as shown in Figure 3, both sides of the suspension plate 1 are provided with transverse grooves 8, and the transverse grooves 8 have a cross-shaped structure, and the lifting device 5 is slidingly clamped inside the transverse groove 8, It is convenient to clamp and install the moving block 15 in the lifting device 5 , so that the lifting device 5 and the hanging plate 1 are slidably clamped.

As a technical optimization scheme of the present invention, as shown in Figure 5, threaded holes 9 are evenly opened around the upper end of the lifting device 5, and the insides of the threaded holes 9 are threaded with locking screws 10, one end of the locking screw 10 It is in contact with the upper surface of the suspension plate 1, and the lifting device 5 is composed of a moving block 15, a brushless motor 16, a threaded ring 17, and a screw rod 18. The brushless motor 16 is a self-locking brushless motor, and the moving block 15 is the king font structure, the lifting device 5 is slid and clamped inside the transverse groove 8 on the hanging plate 1 through the moving block 15, and the middle position of the moving block 15 is vertically provided with a through hole 19, and the screw rod 18 is inserted into the through hole 19. Inside, the lower end of the screw rod 18 extends to the inside of the fixed frame 6 and is fixedly connected with the supporting device 7, the lifting device 5 is fixedly connected with the supporting device 7 through the screw rod 18, and the brushless motor 16 is fixedly installed on the upper surface of the moving block 15, The threaded ring 17 is fixedly installed in the inner middle position of the brushless motor 16, and the threaded ring 17 is threadedly connected with the screw rod 18. When the height of the supporting device 7 needs to be adjusted, the brushless motor 16 in the lifting device 5 is turned on, and The threaded ring 17 is located inside the brushless motor 16, similar to the central axis of the brushless motor 16, so that the brushless motor 16 drives the threaded ring 17 to rotate, and the threaded ring 17 is threadedly connected with the screw rod 18, and one end of the screw rod 18 is fixedly installed On the lifting block 21, the lifting block 21 limits the rotation of the screw rod 18, and then when the threaded ring 17 rotates, the screw rod 18 is lifted, and then the lifting block 21 is driven to lift, so as to facilitate the adjustment of the height of the support device 7.

As a technical optimization scheme of the present invention, as shown in Figure 6, a fixed ring 11 is fixedly installed on one side of the upper surface of the support device 7, and the lower end of the lifting device 5 is fixedly installed on the upper surface of the fixed ring 11. 5. The support device 7 is fixedly connected with the support device 7 through the fixed ring 11. The support device 7 is composed of a motor 20, a lift block 21, a threaded rod 22, a support rod 23, and a guide rod 24. The lift block 21 is slidably engaged in the vertical slot 14 , and the fixed ring 11 is fixedly installed in the middle of the upper surface of the lifting block 21, the supporting device 7 is fixedly connected with the lifting device 5 through the lifting block 21, the motor 20 is fixedly installed on one side of the lifting block 21, and the protective cover 13 is fixedly installed On one side of lifting block 21, motor 20 is positioned at the inside of protective cover 13, and threaded rod 22 is fixedly installed on the output end of motor 20, and threaded rod 22 runs through lifting block 21, and extends to the other side of lifting block 21, and One side of the support rod 23 is provided with a threaded blind hole 25, and one end of the threaded rod 22 is threadedly connected with the threaded blind hole 25, and the guide rod 24 is fixedly installed on one side of the lifting block 21, and the number of the guide rods 24 is four. One side of the support rod 23 is uniformly provided with four guide holes 26, the guide rod 24 is plugged into the inside of the guide hole 26, and the outer surface side of the support rod 23 is coated with a wear-resistant pad 27, and the vehicle frame is positioned and fixed. , turn on the motor 20, so that the motor 20 drives the threaded rod 22 to rotate, and the threaded rod 22 is threadedly connected with the threaded blind hole 25 on the support rod 23, and one end of the support rod 23 is plugged with a guide rod 24, and one end of the guide rod 24 It is fixedly connected with the lifting block 21, so that the guide rod 24 limits the rotation of the support rod 23, and then when the threaded rod 22 rotates, the support rod 23 moves to extend or shrink, and the outer surface of the support rod 23 is coated with a durable The sanding pad 27 is so that when the support rod 23 extends into the inside of the vehicle frame, the anti-skid property between the support rod 23 and the vehicle frame is improved, so that the support rod 23 supports and positions the vehicle frame.

As a technical optimization scheme of the present invention, as shown in Fig. 3, a control box 12 is fixedly installed in the middle of the upper surface of the suspension plate 1, and the control box 12 is electrically connected to the lifting device 5 and the support device 7, and the control box 12 is formed by the box Body 28, storage battery 29, balance sensing module 30, wireless communication module 31 and single-chip microcomputer 32, and storage battery 29, balance sensing module 30, wireless communication module 31 and single-chip microcomputer 32 are all fixedly installed inside the box body 28, and the wireless communication module 31 is electrically connected to the single-chip microcomputer 32, and the single-chip microcomputer 32 is electrically connected to the brushless motor 16 and the motor 20. 30 is electrically connected to the single-chip microcomputer 32, which is convenient to control the present invention through an external control device, and is convenient to operate.

As a technical optimization scheme of the present invention, as shown in Figure 1, a protective cover 13 is fixedly installed on one side of the support device 7, and the electrical appliances inside the support device 7 are located inside the protective cover 13, so as to facilitate the protection of the motor 20, Avoid damage to the motor 20 inside the electrophoresis tank during electrophoresis.

As a technical optimization scheme of the present invention, as shown in Figure 4, vertical grooves 14 are vertically provided on both sides of the interior of the fixed frame 6, the vertical grooves 14 are T-shaped structures, and the support device 7 is slidingly clamped on the The inside of the vertical groove 14 is convenient for the support device 7 to move up and down inside the fixed frame 6 .

Working principle: the present invention is rotated and connected with the transmission device at the upper end of the external electrophoresis tank through the rolling shaft 4 at the upper end of the connecting frame 2, so that the hanging plate 1 is hoisted on the external transmission device, and the external frame is placed on the fixed frame 6 During the period, according to the shape of the frame that requires electrophoresis from the outside, adjust the position of the lifting device 5 on the hanging plate 1, so that the lifting device 5 slides inside the transverse groove 8, so that the supporting device 7 moves, and when it moves to a suitable position, twist it The locking screw 10 on the lifting device 5 makes one end of the locking screw 10 tightly pressed against the upper surface of the hanging plate 1, so that the lifting device 5 is fixed on the hanging plate 1, the supporting device 7 is fixed, and the adjustment is performed. , the position of the supporting device 7 moves with the elevating device 5, which is convenient for adjusting the lateral position of the supporting device 7, and adjusts the height of the supporting device 7 according to the position and height of the middle support bracket, the middle support bracket and the tailpipe of the vehicle frame that requires electrophoresis. When adjusting, turn on the brushless motor 16 in the lifting device 5, and the threaded ring 17 is located inside the brushless motor 16, similar to the central axis of the brushless motor 16, so that the brushless motor 16 drives the threaded ring 17 Phase rotation, and threaded ring 17 is threadedly connected with screw rod 18, and one end of screw rod 18 is fixedly installed on the lifting block 21, and lifting block 21 limits the rotation of screw rod 18, and then when threaded ring 17 rotates, makes screw rod 18 carry out lifting, and then The lifting block 21 is driven to move up and down inside the vertical slot 14, which is convenient for adjusting the height of the supporting device 7.

Place the vehicle frame that needs electrophoresis between the fixed frames 6, and when fixing, turn on the motor 20 through the control box 12, so that the motor 20 drives the threaded rod 22 to rotate, and the threaded blind hole on the threaded rod 22 and the support rod 23 25 phase screw connections, one end of the support rod 23 is plugged with a guide rod 24, and one end of the guide rod 24 is fixedly connected with the lifting block 21, so that the guide rod 24 limits the rotation of the support rod 23, and then when the threaded rod 22 rotates, the support rod 23 is extended or retracted, and the outer surface of the support rod 23 is coated with a wear-resistant pad 27, so that when the support rod 23 stretches into the inside of the vehicle frame, the distance between the support rod 23 and the vehicle frame is improved. Anti-skid, it is convenient for the support rod 23 to support and position the vehicle frame, and to support the different positions of the vehicle frame through multiple support devices 7, so as to realize the positioning and fixing of the vehicle frame, and the external transmission device drives the connecting frame 2 to move, Make the present invention move, and then make the vehicle frame move to the inside of the external electrophoresis tank, carry out electrophoretic spraying on the vehicle frame, after the vehicle frame is electrophoresis sprayed and delivered from the inside of the electrophoresis tank, open the support device 7 in reverse The electric motor 20 makes the support rod 23 in the support device 7 retract, and then the vehicle frame is taken out from the inside of the fixed frame 6, which is convenient for fixing and dismounting the vehicle frame and the present invention without fixing by external screws, which is convenient for operation , and by adjusting the position of the supporting device 7, it is convenient to use for different types of vehicle frames, and has strong versatility.

Finally, it should be noted that: the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still The technical solutions recorded in the foregoing embodiments may be modified, or some of the technical features may be replaced equivalently, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the within the protection scope of the present invention.

Claims (4)

1. A workpiece positioning device for frame electrophoresis spray molding, including a hanging plate (1) and a connecting frame (2), characterized in that: both sides of the upper surface of the hanging plate (1) are evenly fixed with hanging ropes ( 3), and the other end of the sling (3) is fixedly connected to the middle of the lower surface of the connecting frame (2), the connecting frame (2) is a U-shaped structure, and the connecting frame (2) The inner upper end of the hanging plate (1) is rotated and installed with a rolling shaft (4), and the lower ends of both sides of the suspension plate (1) are evenly slid and clamped with a lifting device (5), and the lower end of the lifting device (5) is fixedly installed with a fixing frame ( 6), and the fixed frame (6) is a U-shaped structure, and the support device (7) is slid inside the fixed frame (6), and the upper end side of the support device (7) is connected to the The lower end of the lifting device (5) is fixedly connected; both sides of the hanging plate (1) are provided with transverse grooves (8), and the transverse grooves (8) have a cross-shaped structure, and the lifting device (5) slides It is clamped inside the transverse groove (8); threaded holes (9) are evenly opened around the upper end of the lifting device (5), and the insides of the threaded holes (9) are threaded with locking screws ( 10), one end of the locking screw (10) is in contact with the upper surface of the hanging plate (1); a fixing ring (11) is fixedly installed on one side of the upper surface of the supporting device (7), and the The lower end of the lifting device (5) is fixedly installed on the upper surface of the fixing ring (11), the lifting device (5) is fixedly connected with the supporting device (7) through the fixing ring (11), and the supporting device (7) ) consists of a motor (20), a lifting block (21), a threaded rod (22), a support rod (23), and a guide rod (24). Inside, and the fixed ring (11) is fixedly installed in the middle of the upper surface of the lifting block (21), the support device (7) is fixedly connected with the lifting device (5) through the lifting block (21), and the motor (20) is fixedly installed on one side of the lifting block (21), and the protective cover (13) is fixedly installed on one side of the lifting block (21), the motor (20) is located inside the protective cover (13), and the The threaded rod (22) is fixedly installed on the output end of the motor (20), the threaded rod (22) runs through the lifting block (21) and extends to the other side of the lifting block (21), and the support rod ( One side of 23) is provided with a threaded blind hole (25), and one end of the threaded rod (22) is threadedly connected with the threaded blind hole (25), and the guide rod (24) is fixedly installed on the lifting block (21) One side, and the number of the guide rods (24) is four, and four guide holes (26) are evenly opened on one side of the support rod (23), and the guide rods (24) are inserted into the guide holes (26), one side of the outer surface of the support rod (23) is coated with a wear-resistant pad (27). 2. A workpiece positioning device for frame electrophoresis spray molding according to claim 1, characterized in that: a control box (12) is fixedly installed in the middle of the upper surface of the suspension plate (1), and the control box (12) Electrically connecting the lifting device (5) and the supporting device (7). 3. A workpiece positioning device for frame electrophoretic plastic spraying according to claim 2, characterized in that: vertical grooves (14) are vertically opened on both sides of the interior of the fixing frame (6), and the The vertical slot (14) is a T-shaped structure, and the support device (7) is slidably engaged inside the vertical slot (14). 4. The method for using the workpiece positioning device for electrophoretic plastic spraying of vehicle frame according to claim 3, the steps are as follows: Step 1. Rotately connect the rolling shaft (4) on the upper end of the connecting frame (2) of the present invention to the transmission device on the upper end of the external electrophoresis tank, so that the hanging plate (1) is hoisted on the external transmission device superior; Step 2. Adjust the position of the lifting device (5) on the hanging plate (1) according to the shape of the frame that requires electrophoresis outside, so that the lifting device (5) is inside the transverse groove (8) slide to move the supporting device (7); Step 3. After moving to a suitable position, turn the locking screw (10) on the lifting device (5) so that one end of the locking screw (10) is connected to the hanging plate (1) The upper surfaces are pressed against each other, and then the lifting device (5) is fixed on the hanging plate (1), so that the supporting device (7) is fixed; Step 4. Adjust the height of the supporting device (7) according to the positions and heights of the middle support bracket, middle support bracket and tailpipe of the frame that requires electrophoresis. When adjusting, open the lifting device (5), making the lifting device (5) drive the supporting device (7) to move inside the vertical slot (14); Step 5. Place the frame to be electrophoresed between the fixed frames (6), and open the support device (7) through the control box (12), so that one end of the support device (7) extends and extend into the inside of the frame to support the frame, and support different positions of the frame through multiple supporting devices (7) to realize positioning and fixing of the frame; Step 6, the external transmission device drives the connecting frame (2) to move, so that the present invention moves, and then the frame moves to the inside of the external electrophoresis tank, and electrophoresis sprays plastic on the frame; Step 7: After the electrophoretic plastic spraying of the vehicle frame is completed and transported out of the electrophoresis tank, one end of the support device (7) is retracted by closing the support device (7), so that the vehicle frame is removed from the electrophoresis tank. Remove the inside of the holder (6).

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