Surface treatment method of chuck

Abstract

The invention provides a surface treatment method of a chuck, which comprises the following steps: performing surface treatment on a chuck part exposed on the surface of the chuck, so that the surface of the chuck part presents a mirror stainless steel effect; the technological process comprises the steps of hot dipping oil removal, rust removal activation, chemical chromium plating, passivation protection, closed dehydration and moisture drying. Wherein the chemical chromium plating working solution mainly comprises chromium bromide, chromium chloride, potassium oxalate and sodium acetate, and the pH value of the chemical chromium plating working solution is 4-6. The method can effectively solve the problems that a plating layer on the surface of an existing plating piece is uneven in thickness, sparse, large in number of pores, low in hardness and not good enough in chemical performance and physical performance. The surface of the chuck treated by the technology shows the stainless steel effect. The method has the advantages that the quality is highly stable, operation is convenient, oil contamination and oil dripping do not exist on the surface, management is easy and the like, and the coating is an amorphous alloy body and has multiple special functions of excellent corrosion resistance, abrasion resistance, brightness, high temperature resistance, oxidation resistance, electromagnetic shielding and the like.

Description

Technical Field

[0001] The present invention relates to a surface treatment method for a chuck. Background Art

[0002] At present, the surface of chucks on the market generally adopts the treatment method of turning, precision grinding and then applying antirust oil. However, this method has problems such as the volatilization and rubbing off of the antirust oil, which requires frequent maintenance. Moreover, the dripping antirust oil is not easy to clean up, which hinders 5S management. If the conventional chromium plating method on the market is adopted, when the shape of the plated part is complex, the coating thickness on the surface of the plated part is uneven, the coating is sparse, there are many pores, the hardness is relatively low, and the chemical and physical properties are not good enough. Summary of the Invention

[0003] The purpose of the present invention is to provide a chemical chromium plating method for the surface of a chuck, which can effectively solve the problems of uneven coating thickness, sparse coating, many pores, low hardness, and insufficient chemical and physical properties on the surface of the current plated parts. For this reason, the present invention adopts the following technical solutions: A surface treatment method for a chuck, characterized in that the chuck parts exposed on the surface of the chuck are subjected to surface treatment so that the surface of the chuck parts presents a mirror stainless steel effect; the technological process of the surface treatment method sequentially includes the following steps: hot dip degreasing, rust removal and activation, chemical chromium plating, passivation protection, sealing and dehydration, and drying moisture; among them, the main components of the chemical chromium plating working solution are chromium bromide, chromium chloride, potassium oxalate, and sodium acetate, and the pH is 4-6.

[0004] On the basis of adopting the above technical solutions, the present invention can also adopt the following further technical solutions, or use these further technical solutions in combination: The step of hot dip degreasing includes: adding degreasing powder into water until it is completely dissolved to form a degreasing solution, putting the chuck parts into the degreasing solution at a temperature of 40-80°C and soaking for about 10-30 minutes until the surface of the chuck parts is hydrophilic.

[0005] The step of rust removal and activation includes: taking a two-in-one degreasing and rust removal agent, diluting it with water, stirring evenly to form a rust removal and activation solution, and putting the chuck parts after hot dip degreasing into the rust removal and activation solution at a temperature of 20-45°C and soaking for 10-30 minutes.

[0006] The working temperature of chemical chromium plating is 70-90°C.

[0007] The composition of the chemical chromium plating working solution is: in each liter of pure water, add 15-17 g / L of chromium bromide, 10-12 g / L of chromium chloride, 4-6 g / L of potassium oxalate, and 9-11 g / L of sodium acetate.

[0008] The steps of passivation protection include: taking a passivator, adding water to dilute it in a plastic tank, stirring evenly to form a passivation solution, putting the chuck parts after chemical chromium plating into the passivation solution, soaking them at room temperature for 1 - 10 minutes, then taking them out, washing them clean with water, and entering the next process.

[0009] The steps of sealing and dehydrating include: taking a sealing agent, adding water to dilute it in a plastic tank, stirring evenly to form a dehydrating and sealing solution, putting the chuck parts after passivation protection into the dehydrating and sealing solution, soaking them at room temperature for 1 - 10 minutes, then taking them out, washing them clean with water, and entering the next process.

[0010] The steps of drying moisture include: putting the chuck parts after sealing and dehydrating into hot water at 60 - 90 °C, soaking them for 1 - 2 minutes, taking them out and immediately drying them with an oil - free compressed air gun or baking them dry, or for small workpieces, they can be spun dry with a dehydrator.

[0011] Heat treatment is carried out on the chuck parts after the above - mentioned drying of moisture.

[0012] The chuck parts exposed on the surface of the chuck are the disc body of the chuck, or may also include other chuck parts exposed on the surface of the chuck, such as jaws, dust covers, Due to the adoption of the technical solution of the present invention, the electroless plating technology of the present invention can effectively solve the problems of uneven coating thickness, sparse coating, many pores, low hardness, and poor chemical and physical properties on the surface of the current electroplated parts. The surface of the chuck treated with this technology will show the effect of stainless steel. The present invention has the advantages of highly stable quality, convenient operation, no oil stain and oil dripping problems on the surface, and easy management. The coating of the present invention forms a non - crystalline alloy body, with multiple special functions such as excellent corrosion resistance, wear resistance, brightness, high - temperature oxidation resistance, and electromagnetic shielding. Brief Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the chuck structure of this embodiment, in which the disc body adopts the surface treatment method of the present invention.

[0014] Figure 2 It is an exploded view of the chuck structure, showing the composition of the chuck parts of this embodiment. Detailed Embodiment

[0015] Referring to the attached drawings. According to the chuck surface treatment method of the present invention, the chuck parts exposed on the surface of the chuck are subjected to surface treatment and then used for assembling the chuck. Taking this embodiment as an example, the chuck parts exposed on the surface of the chuck are the disc body 1 of the chuck. According to needs, it may also include jaws 2, dust covers 3, T - shaped blocks 4, jaw seats 5, etc. The reference numeral 6 in the attached drawings is the dust cover mounting seat of the chuck in this embodiment, the reference numeral 7 is the wedge - shaped core sleeve of the chuck in this embodiment, the reference numeral 8 is the push - pull screw sleeve of the chuck in this embodiment, the reference numeral 9 is the rear fixing cover of the chuck in this embodiment, and the reference numeral 10 is the flange of the chuck in this embodiment.

[0016] The technological process of the surface treatment method successively includes the following steps: hot dip degreasing, rust removal and activation, chemical chromium plating, passivation protection, sealing and dehydration, and drying moisture. Among them: 1. Hot dip degreasing: Take 1 kg of degreasing powder and add it to 10 liters of water until completely dissolved. Tie the chuck part, i.e., the disk body 1, tightly with a stainless steel fixture hook or wire and immerse it in the degreasing solution at a temperature of 40 - 80 °C for about 10 - 30 minutes until the surface of the chuck part is hydrophilic. Stubborn oil stains and rust layers need to be cleaned mechanically or manually. It is recommended to use ultrasonic degreasing or electrolytic degreasing for better and faster decontamination ability.

[0017] Inspection standard for degreasing effect: The uniform water film on the surface of the chuck part (hydrophilic surface) indicates that the oil has been removed. If there is accumulation and rupture of the water film on the surface of the chuck part (forming water droplets), it proves that there is still oil on the surface of the chuck part, and it must be continuously cleaned until it is clean before proceeding to the next process.

[0018] 2. Rust removal and activation: Take one liter of two-in-one degreasing and rust removal agent, add 4 - 6 liters of water and dilute it in a plastic tank, stir evenly. Put the chuck part after hot dip degreasing into the rust removal and activation solution at a temperature of 20 - 45 °C and soak for 10 - 30 minutes. The higher the temperature, the faster the degreasing and penetration speed. Observe that the oil stains and rust spots on the surface of the chuck part are completely removed, then take it out, wash it with water until clean, and then proceed to the next process.

[0019] 3. Chemical chromium plating (taking the preparation of 1 liter of chromium plating working solution as an example): First, take 1 liter of pure water, add 16 g / L of chromium bromide, 11 g / L of chromium chloride, 5 g / L of potassium oxalate, and 10 g / L of sodium acetate into a clean plastic tank (PP\PVC tank), keep the pH at 4 - 6, stir evenly, then heat it with a heating tube and keep the temperature at 70 - 90 °C for production. Put the chuck part after rust removal and activation into the above mixed solution. Determine the soaking time according to the required thickness or gloss of the chuck part. Usually, the surface of the chuck part thickens by 1 UM in 3 minutes. After the chuck part meets the requirements, take it out, wash it with water until clean, and then proceed to the next process.

[0020] 4. Passivation protection: Take 1 liter of passivation agent, add 4 - 6 liters of water and dilute it in a plastic tank, stir evenly for use. Put the chuck part after chemical chromium plating into the passivation solution and soak it at room temperature for 1 - 10 minutes, then take it out, wash it with water until clean, and proceed to the next process.

[0021] 5. Sealing and dehydration: Take 1 liter of sealing agent, add 8 - 10 liters of water and dilute it in a plastic tank, stir evenly for use. Put the chuck part after passivation protection into the dehydration and sealing solution and soak it at room temperature for 1 - 10 minutes, then take it out, wash it with water until clean, and proceed to the next process.

[0022] 6. Drying moisture: Immerse the chuck parts after sealed dehydration in hot water at 60 - 90 °C for 1 - 2 minutes, take them out and immediately dry them with an oil-free compressed air gun or by baking, or small workpieces can be spin-dried with a dehydrator. After the chuck parts are completely cooled, they can be packaged.

[0023] After being treated by the surface treatment technology of the present invention, the disk body 1 of the chuck will present the effect of mirror-like stainless steel, and the surface of the assembled chuck will present the style of mirror-like stainless steel.

[0024] Continuous production process maintenance: 1. During continuous production, it is necessary to timely supplement some consumed potions, clean the sediments in each potion or replace some aging potions. 2. During continuous processing of chemical chrome plating, the concentration of the working solution will decrease with time. Use a precision pH test paper to detect the pH of the working solution. If the pH is lower than 4.0, add a small amount of pH adjuster to the working solution under stirring to adjust the pH to the range of 4 - 6.

[0025] The above are only specific embodiments of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present invention are covered by the protection scope of the present invention.

Claims

1. A surface treatment method for a chuck, characterized in that: The chuck parts exposed on the chuck surface are surface treated so that the surface of the chuck parts presents a mirror stainless steel effect; the process flow of the surface treatment method includes the following steps in sequence: hot dip degreasing, rust removal and activation, chemical chromium plating, passivation protection, closed dehydration, and drying of moisture; wherein the main components of the chemical chromium plating working solution are chromium bromide, chromium chloride, potassium oxalate, and sodium acetate, with a pH of 4-6.

2. A method for surface treatment of a chuck according to claim 1, characterized in that: The hot dip degreasing step includes: adding degreasing powder to water until it is completely dissolved to form a degreasing liquid, and immersing the chuck parts in the degreasing liquid at a temperature of 40-80° C. for 10-30 minutes until the surface of the chuck parts is hydrophilic.

3. A surface treatment method for a chuck according to claim 1, characterized in that: The rust removal and activation steps include: taking a two-in-one degreasing and rust removal agent, adding water to dilute it, stirring it evenly to form a rust removal and activation liquid, and soaking the chuck parts after hot dip degreasing in the rust removal and activation liquid at a temperature of 20-45°C for 10-30 minutes.

4. A method for surface treatment of a chuck according to claim 1, characterized in that: The working temperature of chemical chromium plating is 70-90℃.

5. A method for surface treatment of a chuck according to claim 1, characterized in that: The composition of the chemical chromium plating working solution is: add 15-17g / L of chromium bromide, 10-12g / L of chromium chloride, 4-6g / L of potassium oxalate, and 9-11g / L of sodium acetate to each liter of pure water.

6. A method for surface treatment of a chuck according to claim 1, characterized in that: The passivation protection steps include: taking a passivating agent and adding water to dilute it in a plastic tank, stirring it evenly to form a passivation solution, putting the chuck parts after chemical chrome plating into the passivation solution and soaking them at room temperature for 1-10 minutes, then taking them out, washing them with water and entering the next process.

7. A method for surface treatment of a chuck according to claim 1, characterized in that: The steps of sealing and dehydrating include: taking a sealant and adding water to dilute it in a plastic tank, stirring it evenly to form a dehydration sealing liquid, placing the chuck parts after passivation protection into the dehydration sealing liquid and soaking them at room temperature for 1-10 minutes, then taking them out, washing them with water and entering the next process.

8. A method for surface treatment of a chuck according to claim 1, characterized in that: The steps of drying water include: putting the sealed and dehydrated chuck parts into 60-90℃ hot water and soaking them for 1-2 minutes, taking them out and immediately blowing or baking them with an oil-free compressed air gun, or small workpieces can be dried with a dehydrator.

9. A method for surface treatment of a chuck according to claim 1, characterized in that: The chuck part exposed on the chuck surface is the chuck body.

10. The surface treatment method of a chuck according to claim 1, characterized in that: The mirror stainless steel effect can be achieved by other surface treatment methods.

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