Flexible autorotation tool for preparing chemical conversion coating
By designing a flexible self-rotating fixture, the problem of poor film quality caused by mutual contact during the chemical conversion of rivet-type parts was solved. This resulted in cleaner parts surfaces and improved film quality, avoiding scrap and increasing production efficiency.
Patent Information
- Application Number
- CN202422904355.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-11-27
AI Technical Summary
During the chemical conversion process, rivet-type parts come into contact with each other, resulting in poor film quality that is difficult to clean, leading to batch scrapping.
A flexible self-rotating fixture for preparing chemical conversion membranes is designed, which uses a hanging rod, flexible connectors and fixture body. By rotating the fixture, the surface of the parts can be fully contacted with the bath liquid, avoiding contact between parts, ensuring clean cleaning and smooth film formation.
This improved the quality of the chemical oxide film layer, avoided rework and mass scrapping of rivet parts, and increased production efficiency.
Smart Images
Figure CN223535208U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a flexible self-rotating tooling for preparing chemical conversion films, belonging to the field of tooling and fixture manufacturing. Background Technology
[0002] Chemical conversion coatings for aluminum alloys are colored or colorless films used as a base coat for paint, or as a standalone anti-corrosion coating for parts, and have a wide range of applications. This method is used to prepare coatings for tubular parts, rivets, and other parts that are unsuitable for electro-oxidation processes. During the chemical conversion treatment, contact between the parts and the mounting fixtures, as well as overlap between the surfaces of the parts, should be minimized to ensure the formation of a continuous and complete coating.
[0003] Rivet parts, due to their small surface area and large quantity (typically tens or even hundreds of thousands), require chemical oxidation for surface treatment to form a film. The existing tooling production method involves laying the rivets flat within a fixture, resulting in a small loading capacity and requiring dozens of passes to complete part production. Furthermore, the flat loading and stacking of rivets, along with the surface contact during pretreatment and chemical conversion, makes thorough cleaning difficult, leading to poor film quality and even partial failure to form a film. After chemical conversion, rivet parts require varnish dipping, rendering rework impossible and ultimately resulting in mass scrap. Utility Model Content
[0004] The purpose of this invention is to provide a flexible self-rotating tooling for preparing chemical conversion films, which breaks the contact between parts and effectively improves the quality of the chemical oxide film layer.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a flexible self-rotating fixture for preparing chemical conversion membranes, the fixture comprising a hanging rod, a flexible connector, and a fixture body; one end of the hanging rod is provided with a hook for connecting to a hanger, and the other end is connected to the fixture body through the flexible connector; the fixture body is loaded with parts, and a drainage hole is opened on the surface of the fixture body.
[0006] Preferably, the tooling body includes a cover and a frame, with the cover fitting into the opening of the frame to confine the part within the frame.
[0007] Preferably, the tooling body further includes support legs, which are welded to the bottom of the frame.
[0008] Preferably, a hollow sphere is provided between the support leg and the bottom of the frame.
[0009] Preferably, the main body of the tooling is made of titanium alloy.
[0010] Preferably, the hanging rod is made of stainless steel.
[0011] Preferably, the flexible connector is made of titanium alloy.
[0012] Preferably, the sphere is made of a non-metallic material.
[0013] Principle: When using this fixture to load parts (rivets, pipes, etc.) for chemical conversion, the fixture can automatically rotate within the bath solution in conjunction with a crane, separating the parts that were in contact with each other during the stacking process. Due to its flexible connection, the rotation direction is not fixed during each lifting operation, ensuring sufficient contact between the part surface and the bath solution. This allows the rivet surface to be thoroughly cleaned during pretreatment, facilitates film formation during the chemical conversion stage, and ultimately achieves the required film quality.
[0014] Compared with the prior art, the present invention has the following advantages: it breaks the contact between rivets, thereby effectively improving the quality of the chemical oxide film layer. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;
[0016] Figure 1 In the middle, 1. Hanging rod hook; 2. Flexible connector; 3. Cover; 4. Frame; 5. Sphere; 6. Support leg. Detailed Implementation
[0017] The following is in conjunction with the appendix Figure 1 The present invention is further described in detail as follows: A flexible self-rotating tooling for preparing chemical conversion membranes is composed of a tooling body, a hanging rod hook 1, a flexible connector 2, and a ball 5; one end of the hanging rod hook 1 is connected to a hanger, and the other end is connected to the tooling body through the flexible connector 2; the tooling body is loaded with parts, and drainage holes are opened on the surface of the tooling body.
[0018] Specifically,
[0019] like Figure 1 As shown, the main body of the fixture is made of titanium alloy and includes a cover 3, a frame 4, and support legs 6. The cover 3 is used to close the opening of the frame 4, and the support legs 6 are welded to the bottom of the frame 4 to support the main body of the fixture and ensure its stability. Drainage holes (not shown in the figure) are opened on both the cover 3 and the frame 4. During the production process of loading rivet-type parts, after immersion in the tank, the tank solution can smoothly contact the surface of the parts through the drainage holes. When the fixture is lifted out of the tank, the tank solution can be discharged through the drainage holes, preventing the tank solution from being immersed in the next process tank with the fixture and causing cross-contamination of the tank solutions, thus ensuring the smooth progress of the surface treatment process. At the same time, the cover 3 and the frame 4 can be completely separated, which facilitates the loading and unloading of rivet-type parts.
[0020] The hanging rod hook 1 is made of stainless steel to increase the overall load-bearing capacity. The top of the hook is made into an inverted V shape to facilitate the use of support rods for hangers of different sizes. The bottom of the hook is made into a ring to connect with the flexible connector 2, which facilitates the connection of the flexible connector 2.
[0021] The flexible connector 2 is made of titanium alloy, which can be bent arbitrarily and has good load-bearing capacity. It is used to connect the hook 1 and the cover 3 of the hanging rod and is easy to replace.
[0022] Sphere 5 is hollow and made of non-metallic material, which reduces the weight of the tooling. It is fixed to the main body of the tooling (bottom of the support legs) by support legs. After the tooling is immersed in the coating solution, it provides buoyancy, causing a shift in the tooling's center of gravity. This causes the rivet-like parts to flip to one side, thus flipping the tooling over. After the tooling is lifted, gravity causes the rivet-like parts to flip again, returning the tooling to its upright position, ultimately achieving full contact between the rivet-like parts and the coating solution.
[0023] The above embodiments are merely preferred embodiments of this utility model and do not constitute a limitation thereof. Any extensions, modifications, etc., made by those skilled in the art without departing from the principle of this utility model should be included within the protection scope of this utility model.
Claims
1. A flexible self-rotating tooling for preparing chemical conversion membranes, characterized in that: The fixture includes a hanging rod, a flexible connector, and a fixture body; one end of the hanging rod is provided with a hook for connecting to the hanger, and the other end is connected to the fixture body through the flexible connector; the fixture body is used to load parts, and a drainage hole is opened on the surface of the fixture body.
2. The flexible self-rotating fixture for preparing chemical conversion membranes according to claim 1, characterized in that: The main body of the tooling includes a cover and a frame. The cover fits into the opening of the frame, thereby confining the parts within the frame.
3. The flexible self-rotating fixture for preparing chemical conversion membranes according to claim 2, characterized in that: The main body of the tooling also includes support legs, which are welded to the bottom of the frame.
4. The flexible self-rotating tooling for preparing chemical conversion membranes according to claim 3, characterized in that: A hollow sphere is placed between the supporting leg and the bottom of the frame.
5. The flexible self-rotating fixture for preparing chemical conversion membranes according to claim 1, characterized in that: The main body of the tooling is made of titanium alloy.
6. The flexible self-rotating fixture for preparing chemical conversion membranes according to claim 1, characterized in that: The hanging rod is made of stainless steel.
7. The flexible rotating fixture for preparing chemical conversion membranes according to claim 1, characterized in that: The flexible connector is made of titanium alloy.
8. The flexible self-rotating fixture for preparing chemical conversion membranes according to claim 4, characterized in that: The sphere is made of non-metallic materials.