A phosphating and electrophoresis coating jig for a box cover part

Abstract

The application discloses a phosphating and electrophoretic coating clamp for box cover parts, which guarantees uniform and complete phosphating film and electrophoretic coating film and improves the appearance quality of the real object. The phosphating and electrophoretic coating clamp for box cover parts is characterized in that the two sides of the box cover part are provided with A holes and B holes, the clamp body is a planar frame structure, a plurality of clamping pieces are fixed on the clamp body, the A holes and the B holes of the box cover part are sleeved on the adjacent layers of the clamping pieces, and the opening of the box cover part is perpendicular to the plane of the clamp body; the hook has two lower hooks and two upper hooks, the two sides of the clamp body are provided with hook supporting pieces corresponding to the two lower hooks, the lower hooks of the hook hook the corresponding hook supporting pieces, and the upper hooks are used for hooking the conductive rods.

Description

Technical Field

[0001] This invention relates to the field of surface treatment technology, and in particular to a phosphating and electrophoretic coating fixture for box lid parts. Background Technology

[0002] The lid has a bowl-like structure with an effective volume of 1440ml, and due to product requirements, no process holes can be present. Existing electrophoretic coating fixtures cannot effectively hold the parts in place, and after the parts are immersed in the bath, the opening faces downwards due to gravity and buoyancy, preventing the parts from completely expelling gas and forming an air pocket with the liquid. When the parts are removed from the bath, the opening faces upwards due to gravity, preventing the liquid from completely draining. Therefore, after baking, the electrophoretic coating film is incomplete, exhibiting rust, and the appearance quality is difficult to guarantee. Therefore, designing and manufacturing an integrated phosphating + electrophoretic coating fixture to avoid air pockets and solution trapping defects has become a pressing technical challenge in this field. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a phosphating and electrophoretic coating fixture for box lid parts, ensuring that the phosphating film and electrophoretic coating film are uniform and complete, thereby improving the appearance quality of the actual product.

[0004] The objective of this invention is achieved as follows:

[0005] A phosphating and electrophoretic coating fixture for a box lid part is provided. The box lid part has A holes and B holes on both sides. The fixture includes a fixture body and hooks. The fixture body is a planar frame structure. Several clamping parts are fixed on the fixture body. The A holes and B holes of the box lid part are sleeved on the clamping parts of the adjacent layer, and the opening of the box lid part is perpendicular to the plane of the fixture body. The hooks have two downward hooks and two upward hooks. The two sides of the fixture body are provided with hook supports corresponding to the two downward hooks. The downward hooks of the hooks hook the corresponding hook supports, and the upward hooks are used to hang conductive rods.

[0006] Preferably, the clamping components are C-shaped, each clamping component having an inner clamping rod and an outer clamping rod. The inner and outer clamping rods of the clamping components are located on the same horizontal plane, and the planes containing the inner and outer clamping rods are perpendicular to the plane of the clamping body. In the adjacent layers of clamping components that fit the cover part, the inner clamping rod of the upper layer clamping component fits into the A hole of the cover part, and the outer clamping rod of the lower layer is used to fit into the B hole of the cover part, so that the opening of the cover part is perpendicular to the plane of the clamping body.

[0007] Preferably, it also includes a buoyancy box, with a buoyancy box rod fixed to the lower end of the buoyancy box, and an insertion hole provided on one side of the upper end of the fixture body. The buoyancy box rod is inserted into the insertion hole of the fixture body and fixed with bolts. The buoyancy box is used to make the fixture body float in the tank liquid.

[0008] Preferably, the clamp body, hook, and buoyancy box are all welded from low-carbon steel.

[0009] Preferably, two buoyancy box rods are fixed to the lower end of the buoyancy box, and two insertion holes are provided on one side of the clamp body.

[0010] Preferably, in the state of the bath liquid: the clamp body and the lid part are subjected to their own weight, lateral buoyancy and upward support force of the hook. In order to maintain the balance, the center of gravity of the clamp body and the lid part is shifted towards the buoyancy box, so that the opening of the lid part is obliquely upward in the bath liquid, which is conducive to the complete exhaust of air.

[0011] Discharge state: The clamp body and the lid part are subjected to the combined action of their own weight, the weight of the buoyancy box and the upward supporting force of the hook. Since the center of gravity of the buoyancy box is on the side of the hook, in order to maintain the balance, the center of gravity of the clamp body and the lid part shifts away from the buoyancy box, so that the opening of the lid part is tilted downward, and all the solution is discharged.

[0012] Preferably, when in the bath solution, the opening of the lid part is angled upwards at 15°.

[0013] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0014] This invention utilizes gravity and buoyancy to ensure that the opening of the part faces upward after entering the tank, facilitating gas expulsion; and that the opening faces downward after exiting the tank (including during drying), facilitating solution drainage. This invention effectively overcomes defects such as air pockets and solution trapping after electrophoretic coating, thus ensuring uniform and complete phosphating and electrophoretic coating films, significantly improving the appearance quality of the finished product. It is suitable for use on box lid parts.

[0015] (1) The fixture is made of low carbon steel material by welding, with good electrical conductivity and strength that meets the requirements of use.

[0016] (2) The fixture can effectively fix the parts, and there will be no collision or friction between them, and no contact marks will be produced when painting.

[0017] (3) This fixture can achieve the integration of phosphating and electrophoretic coating, effectively reducing the number of times parts need to be disassembled and clamped.

[0018] (4) This fixture utilizes the principles of gravity and buoyancy to ensure that the opening of the part faces upward after entering the tank, which is conducive to the exhaust of gas. After the part leaves the tank (including during drying), the opening faces downward, which is conducive to the discharge of the solution. This effectively ensures that the phosphating film and the electrophoretic coating film are uniform and intact. Attached Figure Description

[0019] Figure 1 This is a front view of the fixture body;

[0020] Figure 2 yes Figure 1 A top-down view;

[0021] Figure 3 This is a structural diagram of the hook;

[0022] Figure 4 This is a structural diagram of the buoyancy box;

[0023] Figure 5 This is a structural diagram of the box lid part;

[0024] Figure 6 , Figure 7 This is a schematic diagram of the working state of the present invention.

[0025] Figure Labels

[0026] In the diagram: 1 is the hook support; 2 is the inner clamping rod; 3 is the outer clamping rod; 4 is the insertion hole; 5 is the lower hook; 6 is the buoyancy box rod. The components or parts in the diagram are not necessarily drawn to actual scale. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0028] See Figures 1-7 A phosphating and electrophoretic coating fixture for box lid parts is provided. The fixture is welded from low-carbon steel, exhibiting good electrical conductivity and sufficient strength to meet usage requirements. The fixture mainly consists of three parts: the fixture body, hooks, and a buoyancy box. In use, first, the A hole of the part is passed through the inner clamping rod 2 of the first row of the fixture body, and the B hole is passed through the outer clamping rod 3 of the second row. Seventeen parts are then fixed to the fixture in this manner. Next, the buoyancy box rod 6 is inserted into the buoyancy box rod insertion hole 4. Finally, the lower hook 5 of the hook is hooked onto the hook support 1 of the fixture body, completing the clamping process of the phosphating + electrophoretic coating fixture. The entire fixture is then hung on the conductive rod, allowing it to be immersed in the tank for the phosphating and electrophoretic coating processes. In the bath, under the combined effects of buoyancy and gravity, the buoyancy, greater than gravity, causes the fixture body and the lid to tilt in the bath, with the lid opening angled upwards. This allows for complete gas expulsion and full contact between the solution and the parts, resulting in a complete and uniform phosphating film and electrophoretic coating. After removal from the bath, gravity causes the parts to face downwards, allowing all the solution to drain. The fixture can be repeatedly recycled.

[0029] A phosphating and electrophoretic coating fixture for a box lid part is provided. The box lid part has A holes and B holes on both sides. The fixture includes a fixture body and hooks. The fixture body is a planar frame structure. Several clamping parts are fixed on the fixture body. The A holes and B holes of the box lid part are sleeved on the clamping parts of the adjacent layer, and the opening of the box lid part is perpendicular to the plane of the fixture body. The hooks have two downward hooks and two upward hooks. The two sides of the fixture body are provided with hook supports corresponding to the two downward hooks. The downward hooks of the hooks hook the corresponding hook supports, and the upward hooks are used to hang conductive rods.

[0030] The clamping components are C-shaped, each with an inner clamping rod and an outer clamping rod. The inner and outer clamping rods of the clamping components are located on the same horizontal plane, and the planes containing the inner and outer clamping rods are perpendicular to the plane of the fixture body. In the adjacent layers of clamping components that fit the lid part, the inner clamping rod of the upper layer clamping component fits into the A hole of the lid part, and the outer clamping rod of the lower layer is used to fit into the B hole of the lid part, so that the opening of the lid part is perpendicular to the plane of the fixture body.

[0031] It also includes a buoyancy box, with a buoyancy box rod fixed to its lower end. A socket is provided on one side of the upper end of the clamp body. The buoyancy box rod is inserted into the socket of the clamp body and secured with bolts. The buoyancy box is used to make the clamp body float in the tank liquid. The clamp body, hook, and buoyancy box are all welded from low-carbon steel. Two buoyancy box rods are fixed to the lower end of the buoyancy box, and two sockets are provided on one side of the clamp body.

[0032] In the bath: the clamp body and the lid part are subjected to their own weight, lateral buoyancy and upward support force of the hook. In order to maintain a balanced state, the center of gravity of the clamp body and the lid part is shifted towards the buoyancy box (the buoyancy box applies an oblique force to the clamp body, causing the clamp body to rotate relative to the hook), so that the opening of the lid part is obliquely upward in the bath, which is conducive to the complete expulsion of air; in this embodiment, in the bath, the opening of the lid part is obliquely upward at 15°.

[0033] Discharge state: The clamp body and the lid part are subjected to the combined action of their own weight, the weight of the buoyancy box and the upward supporting force of the hook. Since the center of gravity of the buoyancy box is on the side of the hook, in order to maintain the balance, the center of gravity of the clamp body and the lid part shifts away from the buoyancy box, so that the opening of the lid part is tilted downward, and all the solution is discharged.

[0034] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A phosphating and electrophoretic coating fixture for a box lid part, wherein holes A and B are provided on both sides of the box lid part, characterized in that: The fixture includes a clamp body and hooks. The clamp body is a planar frame structure with several clamping components fixed on it. The A and B holes of the box cover part are fitted onto the clamping components of the adjacent layer, and the opening of the box cover part is perpendicular to the plane of the clamp body. The hooks have two lower hooks and two upper hooks. Hook supports are provided on both sides of the clamp body corresponding to the two lower hooks. The lower hooks of the hooks hook onto the corresponding hook supports, and the upper hooks are used to hang the conductive rods. The clamping components are C-shaped, and each clamping component has an inner clamping rod and an outer clamping rod. The inner and outer clamping rods of the clamping components are located on the same horizontal plane, and the planes where the inner and outer clamping rods are located are perpendicular to the plane of the clamping body. In the adjacent layers of clamping components that fit the cover part, the inner clamping rod of the upper layer clamping component fits into the A hole of the cover part, and the outer clamping rod of the lower layer is used to fit into the B hole of the cover part, so that the opening of the cover part is perpendicular to the plane of the clamping body. It also includes a buoyancy box, with a buoyancy box rod fixed to the lower end of the buoyancy box. A hole is provided on one side of the upper end of the fixture body. The buoyancy box rod is inserted into the hole of the fixture body and fixed with bolts. The buoyancy box is used to make the fixture body float in the tank liquid.

2. The phosphating and electrophoretic coating fixture for a box lid part according to claim 1, characterized in that: The clamp body, hook, and buoyancy box are all welded from low-carbon steel.

3. The phosphating and electrophoretic coating fixture for a box lid part according to claim 1, characterized in that: Two buoyancy box rods are fixed to the lower end of the buoyancy box, and two insertion holes are provided on one side of the clamp body.

4. The phosphating and electrophoretic coating fixture for a box lid part according to claim 1, characterized in that: In the bath: The clamp body and the lid part are subjected to their own weight, lateral buoyancy and the upward support force of the hook. In order to maintain the balance, the center of gravity of the clamp body and the lid part shifts towards the buoyancy box, so that the opening of the lid part is tilted upward in the bath, which is conducive to the complete expulsion of air. Discharge state: The clamp body and the lid part are subjected to the combined action of their own weight, the weight of the buoyancy box and the upward supporting force of the hook. Since the center of gravity of the buoyancy box is on the side of the hook, in order to maintain the balance, the center of gravity of the clamp body and the lid part shifts away from the buoyancy box, so that the opening of the lid part is tilted downward, and all the solution is discharged.

5. The phosphating and electrophoretic coating fixture for a box lid part according to claim 4, characterized in that: When in the bath solution, the opening of the box cover is angled upwards at 15°.

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