Chain batch surface treatment process based on centrifugal polishing

Abstract

The invention belongs to the technical field of chains, and particularly relates to a chain batch surface treatment process based on centrifugal polishing, which comprises the following steps: adding chain parts into an ethanol water solution for washing, taking out and drying, and then putting into a sodium chloride ethanol solution for ultrasonic treatment to obtain a washing solution; putting the chain part into a ball milling tank for ball milling treatment, cleaning the chain part after the chain part is removed, then spraying a pickling solution, standing and cleaning the chain part to obtain a derusted chain part; sodium chloride is put into ethyl alcohol for low-temperature ultrasonic treatment, sodium chloride colloidal particles are obtained through reduced-pressure stirring, then the chain part is put into the sodium chloride colloidal particles, and a polished chain part is obtained through centrifugal polishing; and the polished chain part is cleaned and oiled after being subjected to heat treatment, and the chain is obtained through assembling. The problem that the surface roughness stability of an existing chain is poor is solved, sodium chloride is matched with ethyl alcohol to form fine colloidal particles, a fine and stable rough structure is formed on the surface of a chain part in a centrifugal polishing mode, and the balance of the surface performance of the chain part is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of chains, and particularly relates to a chain batch surface treatment process based on centrifugal polishing. BACKGROUND

[0002] A chain is an assembly formed by connecting multiple metal rings or chain links, and is usually used for transmitting mechanical force or as a support structure. The chain is an important mechanical assembly and is widely used in various machines and equipment. However, the chain is in a stable and continuous running state during use, and the surface roughness directly affects the wear and transmission stability of the chain, and the transmission efficiency of the chain requires a certain roughness. The current chain roughness is manually roughened by a polishing machine, which is low in efficiency and poor in controllability of polishing quality. SUMMARY

[0003] In view of the problems in the prior art, the application provides a chain batch surface treatment process based on centrifugal polishing, solves the problem of poor surface roughness stability of the existing chain, and forms fine and stable rough structures on the surface of the chain part by using sodium chloride to form fine colloidal particles with ethanol and using a centrifugal polishing method, thereby improving the uniformity of the surface performance of the chain part.

[0004] To achieve the above technical purposes, the technical scheme of the application is as follows: A chain batch surface treatment process based on centrifugal polishing, comprising the following steps: Step 1, chain parts are washed in an ethanol aqueous solution for 10-20 min, taken out, dried, and then placed in a sodium chloride ethanol solution for ultrasonic treatment for 20-30 min to obtain a washing liquid; the volume fraction of ethanol in the ethanol aqueous solution is 40-60%, the concentration of the chain parts in the ethanol aqueous solution is 400-600 g / L, the stirring speed of washing is 100-200 r / min, and the temperature is 50-60 DEG C; the mass ratio of sodium chloride to ethanol in the sodium chloride ethanol solution is 1:4-7, and the concentration of the chain parts in the sodium chloride ethanol solution is 200-400 g / L, the ultrasonic treatment temperature is 5-10 DEG C, and the ultrasonic frequency is 90-120 kHz; this step uses the permeability and washing property of the ethanol aqueous solution, and cooperates with the temperature to improve the flowability of ethanol and water, so as to achieve the preliminary washing and emulsification of the surface of the chain parts; sodium chloride forms colloidal particle structures in ethanol, cooperates with high-frequency vibration of ultrasonic, can effectively improve the penetration and peeling of small sodium chloride particles on the surface of the chain parts, and removes surface grease; Step 2, the chain parts are put into a ball mill tank for ball milling treatment, cleaned after removal, then sprayed with an acid washing solution, cleaned after standing for 0.5-1h, to obtain rust-removed chain parts, the ball milling treatment is carried out under a nitrogen atmosphere, and the diameter of the ball milling grinding ball is 3-5mm, and the ball milling treatment time is 3-5h; the acid washing solution is hydrochloric acid, and the pH of the acid washing solution is 5-6, and the standing temperature is 50-60 DEG C; this step uses the ball milling mode to preliminarily strip the surface rust and preliminarily open the oxide layer, to provide conditions for subsequent acid washing spraying, and then further washing and stripping are formed in the spraying and standing, to completely remove the oxide layer; Step 3, sodium chloride is put into ethanol for low-temperature ultrasonic treatment for 20-30min, sodium chloride colloidal particles are obtained through reduced-pressure stirring, then the chain parts are put in, and polished chain parts are obtained through centrifugal polishing, the mass ratio of sodium chloride to ethanol is 1:2-3, the low-temperature ultrasonic treatment temperature is 5-10 DEG C, and the ultrasonic frequency is 100-120kHz; the reduced-pressure stirring pressure is 80-90% of atmospheric pressure, the temperature is 60-70 DEG C, and the stirring speed is 400-600r / min; the mass ratio of the chain parts to sodium chloride is 1:5-8, and the centrifugal polishing speed is 5000-6000rpm; this step uses sodium chloride to form dispersed colloidal particles under the action of ethanol, and the particles are kept small, so that the surface is roughened; Step 4, the polished chain parts are heat treated, cleaned and oiled, and then assembled to obtain a chain; the heat treatment temperature is 800-830 DEG C; the holding time is 10-30min, and the tempering temperature is 300-350 DEG C; this step uses the heating and holding of heat treatment to improve the structure, and after rapid air cooling, tempering treatment is carried out to ensure the toughness of the chain, and the oxides and residues are removed, and the corrosion resistance and lubricity of the chain are improved.

[0005] From the above description, it can be seen that the present application has the following advantages: 1. The present application solves the problem of poor surface roughness stability of the existing chain, uses sodium chloride to form small colloidal particles with ethanol, and uses the centrifugal polishing mode to form a small and stable rough structure on the surface of the chain parts, thereby improving the balance of the surface performance of the chain parts.

[0006] 2. The present application uses the permeability and emulsifying property of sodium chloride colloidal particles, and the stripping effect of ultrasonic treatment, to remove impurities and grease on the surface of the chain parts, without using an alkaline solution.

[0007] 3. The present application uses the ball milling mode to remove the surface oxide layer with the spraying of the acid washing solution, thereby improving the surface stability of the chain parts and reducing the difficulty of subsequent ball milling. DETAILED DESCRIPTION

[0008] The application will be described in detail in connection with the embodiments, but without limiting the claims of the application in any way. Example 1

[0009] A chain batch surface treatment process based on centrifugal polishing, comprising the following steps: Step 1, chain parts are added to an ethanol aqueous solution for washing for 10 min, taken out, dried, and then placed in a sodium chloride ethanol solution for ultrasonic treatment for 20 min to obtain a washing liquid; the volume fraction of ethanol in the ethanol aqueous solution is 60%, the concentration of the chain parts in the ethanol aqueous solution is 600 g / L, the stirring speed of washing is 100 r / min, and the temperature is 50℃; the mass ratio of sodium chloride to ethanol in the sodium chloride ethanol solution is 1:7, and the concentration of the chain parts in the sodium chloride ethanol solution is 400 g / L, the ultrasonic treatment temperature is 5℃, and the ultrasonic frequency is 90 kHz; Step 2, the chain parts are placed in a ball mill tank for ball milling treatment, cleaned after removal, then sprayed with an acid washing liquid, cleaned after standing for 0.5 h to obtain rust-removed chain parts; the ball milling treatment is carried out in a nitrogen atmosphere, and the diameter of the milling ball is 3 mm, and the ball milling treatment time is 3 h; the acid washing liquid uses hydrochloric acid, and the pH of the acid washing liquid is 5, and the standing temperature is 50℃; Step 3, sodium chloride is placed in ethanol for low-temperature ultrasonic treatment for 20 min, sodium chloride colloidal particles are obtained by reduced-pressure stirring, and then the chain parts are placed in for centrifugal polishing to obtain polished chain parts; the mass ratio of sodium chloride to ethanol is 1:3, the low-temperature ultrasonic treatment temperature is 5℃, and the ultrasonic frequency is 100 kHz; the reduced-pressure stirring pressure is 80% of atmospheric pressure, the temperature is 60℃, and the stirring speed is 400 r / min; the mass ratio of the chain parts to sodium chloride is 1:8, and the centrifugal polishing speed is 5000 rpm; Step 4, the polished chain parts are heat treated, cleaned, and oiled, and then assembled to obtain a chain; the heat treatment temperature is 800℃, the holding time is 10 min, and the tempering temperature is 300℃.

[0010] The chain parts prepared by the embodiment have a surface roughness of not more than 0.1 μm, and the surface roughness is relatively uniform and has fewer dead angles. Example 2

[0011] A chain batch surface treatment process based on centrifugal polishing, comprising the following steps: Step 1, the chain parts are added into an ethanol aqueous solution for washing for 20 min, taken out, dried, and then put into a sodium chloride ethanol solution for ultrasonic treatment for 30 min to obtain a washing liquid; the volume percentage of ethanol in the ethanol aqueous solution is 40%, the concentration of the chain parts in the ethanol aqueous solution is 400 g / L, the stirring speed of washing is 200 r / min, and the temperature is 60℃; the mass ratio of sodium chloride to ethanol in the sodium chloride ethanol solution is 1:4, and the concentration of the chain parts in the sodium chloride ethanol solution is 200 g / L, the ultrasonic treatment temperature is 5℃, and the ultrasonic frequency is 120 kHz; Step 2, the chain parts are put into a ball mill tank for ball milling treatment, cleaned after removal, then sprayed with an acid washing liquid, cleaned after standing for 1 h to obtain rust-removed chain parts; the ball milling treatment is carried out in a nitrogen atmosphere, and the diameter of the milling ball is 5 mm, and the ball milling treatment time is 5 h; the acid washing liquid is hydrochloric acid, and the pH of the acid washing liquid is 6, and the standing temperature is 60℃; Step 3, sodium chloride is put into ethanol for low-temperature ultrasonic treatment for 30 min, sodium chloride colloidal particles are obtained through reduced-pressure stirring, and then the chain parts are put in for centrifugal polishing to obtain polished chain parts; the mass ratio of sodium chloride to ethanol is 1:2, the low-temperature ultrasonic treatment temperature is 10℃, and the ultrasonic frequency is 120 kHz; the reduced-pressure stirring pressure is 90% of atmospheric pressure, the temperature is 70℃, and the stirring speed is 600 r / min; the mass ratio of the chain parts to sodium chloride is 1:5, and the centrifugal polishing speed is 6000 rpm; Step 4, the polished chain parts are heat treated, cleaned and oiled, and then assembled to obtain a chain; the heat treatment temperature is 830℃, the holding time is 30 min, and the tempering temperature is 350℃.

[0012] The chain parts prepared by the embodiment have a surface roughness of not more than 0.1 μm, and the surface roughness is relatively uniform and has fewer dead angles. Example 3

[0013] A chain batch surface treatment process based on centrifugal polishing, comprising the following steps: Step 1, the chain parts are added into an ethanol aqueous solution for washing for 20 min, taken out, dried, and then put into a sodium chloride ethanol solution for ultrasonic treatment for 30 min to obtain a washing liquid; the volume percentage of ethanol in the ethanol aqueous solution is 40%, the concentration of the chain parts in the ethanol aqueous solution is 400 g / L, the stirring speed of washing is 200 r / min, and the temperature is 60℃; the mass ratio of sodium chloride to ethanol in the sodium chloride ethanol solution is 1:4, and the concentration of the chain parts in the sodium chloride ethanol solution is 200 g / L, the ultrasonic treatment temperature is 5℃, and the ultrasonic frequency is 120 kHz; Step 2, the chain parts are put into a ball mill tank for ball milling treatment, cleaned after removal, then sprayed with an acid washing solution, cleaned after standing for 1 h to obtain rust-removed chain parts, the ball milling treatment is carried out under a nitrogen atmosphere, the diameter of the ball milling grinding ball is 4 mm, and the ball milling treatment time is 4 h; the acid washing solution is hydrochloric acid, the pH of the acid washing solution is 6, and the standing temperature is 55℃; Step 3, sodium chloride is put into ethanol for low-temperature ultrasonic treatment for 25 min, sodium chloride colloidal particles are obtained by reduced-pressure stirring, then the chain parts are put in, and polished chain parts are obtained by centrifugal polishing, the mass ratio of sodium chloride to ethanol is 1:3, the low-temperature ultrasonic treatment temperature is 8℃, and the ultrasonic frequency is 110 kHz; the reduced-pressure stirring pressure is 85% of the atmospheric pressure, the temperature is 65℃, and the stirring speed is 500 r / min; the mass ratio of the chain parts to sodium chloride is 1:6, and the centrifugal polishing speed is 6000 rpm; Step 4, the polished chain parts are heat treated, cleaned and oiled, and then assembled to obtain a chain; the heat treatment temperature is 820℃, the holding time is 20 min, and the tempering temperature is 330℃.

[0014] The chain parts prepared in the embodiment have a surface roughness of not more than 0.1 μm, and the surface roughness is relatively uniform and has fewer dead angles.

[0015] Comparative Example 1 The chain parts are washed in an ethanol aqueous solution for 15 min, and then taken out and dried to obtain the chain parts. There are still a small amount of oil stains on the surface of the washed chain parts that cannot be cleaned, and the oil stains still exist after repeated washing, compared with Example 3, the washing method of Comparative Example 1 cannot effectively remove the oil stains.

[0016] Comparative Example 2 A chain batch surface treatment process based on centrifugal polishing, comprising the following steps: Step 1, the chain parts are put into an ethanol aqueous solution for washing for 15 min, taken out and dried, and then put into a sodium chloride ethanol solution for ultrasonic treatment for 25 min to obtain a washing solution; the ethanol in the ethanol aqueous solution accounts for 50% by volume, the concentration of the chain parts in the ethanol aqueous solution is 500 g / L, and the stirring speed of washing is 150 r / min at a temperature of 55℃; the mass ratio of sodium chloride to ethanol in the sodium chloride ethanol solution is 1:6, and the concentration of the chain parts in the sodium chloride ethanol solution is 300 g / L, the ultrasonic treatment temperature is 8℃, and the ultrasonic frequency is 100 kHz; Step 2, the chain parts are put into a grinding machine for fine grinding and polishing treatment to obtain polished chain parts, wherein the grinding machine is a continuous controllable segmented high-precision centerless grinding machine, and a 220-mesh rubber grinding wheel is used; Step 3: the polished chain parts are heat treated, cleaned and oiled, and assembled to obtain the chain; the temperature of the heat treatment is 820℃; the holding time is 20 min, and the tempering temperature is 330℃.

[0017] The chain parts of the present comparative example have a surface roughness of 0.2 mm, and the roughness of the local edge area has obvious difference, which is caused by the irregularity of the parts. Meanwhile, the efficiency of the fine grinding and polishing treatment is much lower than that of Example 3.

[0018] It can be understood that the above specific description of the present application is only used to illustrate the present application and is not limited to the technical solutions described in the embodiments of the present application. Those skilled in the art should understand that the present application can still be modified or replaced equivalently to achieve the same technical effect; as long as the use needs are met, it is within the protection scope of the present application.

Claims

1. A chain batch surface treatment process based on centrifugal polishing, characterized by: The steps include: Step 1: Wash the chain parts in an ethanol-water solution for 10-20 minutes, take them out and dry them, then place them in a sodium chloride-ethanol solution for ultrasonic treatment for 20-30 minutes to obtain a washing solution; Step 2: Place the chain parts in a ball milling jar for ball milling, remove and clean them, then spray them with pickling solution, let them stand for 0.5-1h and then clean them to obtain rust-removed chain parts; Step 3: Sodium chloride is placed in ethanol and ultrasonically treated at low temperature for 20-30 minutes, and sodium chloride colloids are obtained by stirring under reduced pressure, and then the chain parts are placed in the ethanol and centrifugally polished to obtain polished chain parts; Step 4: After heat treatment, the polished chain parts are cleaned and oiled, and then assembled to obtain a chain.

2. The process for batch surface treatment of chains based on centrifugal polishing according to claim 1, characterized in that: The volume proportion of ethanol in the ethanol aqueous solution in step 1 is 40-60%, the concentration of chain parts in the ethanol aqueous solution is 400-600 g / L, the stirring speed of washing is 100-200 r / min, and the temperature is 50-60°C.

3. The process for batch surface treatment of chains based on centrifugal polishing according to claim 1, characterized in that: The mass ratio of sodium chloride to ethanol in the sodium chloride ethanol solution in step 1 is 1:4-7, and the concentration of the chain parts in the sodium chloride ethanol solution is 200-400 g / L, the temperature of the ultrasonic treatment is 5-10° C., and the ultrasonic frequency is 90-120 kHz.

4. The process for batch surface treatment of chains based on centrifugal polishing according to claim 1, characterized in that: The ball milling process in step 2 is performed under a nitrogen atmosphere, the diameter of the balls used in the ball milling process is 3-5 mm, and the ball milling process time is 3-5 h.

5. The process for batch surface treatment of chains based on centrifugal polishing according to claim 1, characterized in that: The pickling solution in step 2 is hydrochloric acid, and the pH of the pickling solution is 5-6, and the standing temperature is 50-60°C.

6. The process for batch surface treatment of chains based on centrifugal polishing according to claim 1, characterized in that: The mass ratio of sodium chloride to ethanol in step 3 is 1:2-3, the temperature of the low-temperature ultrasonic treatment is 5-10°C, and the ultrasonic frequency is 100-120kHz; the pressure of the reduced pressure stirring is 80-90% of the atmospheric pressure, the temperature is 60-70°C, and the stirring speed is 400-600r / min.

7. The process for batch surface treatment of chains based on centrifugal polishing according to claim 1, characterized in that: The mass ratio of the chain parts to sodium chloride in step 3 is 1:5-8, and the rotation speed of the centrifugal polishing is 5000-6000 rpm.

8. The process for batch surface treatment of chains based on centrifugal polishing according to claim 1, characterized in that: The heat treatment temperature in step 4 is 800-830°C; the holding time is 10-30 minutes, and the tempering temperature is 300-350°C.