阅读说明：本技术 一种轮毂抛光工艺 (Hub polishing process ) 是由 蒋建华 向毅 于 2019-10-10 设计创作，主要内容包括：本发明公开了一种轮毂抛光工艺,其技术方案要点是：具体包括以下步骤：S1、湿喷丸去氧化皮：选用20-30目的陶瓷丸与水加注至喷丸机内对轮毂进行湿喷丸；S2、清洗轮毂表面：利用高压水枪对轮毂表面进行高压水喷射,水温控制在36-40℃之间；S3、粗抛轮毂：把铝合金轮毂置于装有磨料的振动研磨机中,磨料采用树脂,树脂内均匀混有金刚砂,金刚砂占树脂质量的25％-30％,树脂和金刚砂的尺寸规格为48-96目；S4、中抛轮毂；S5、精抛轮毂：将铝合金轮毂置于旋转表面抛光机内精抛,控制旋转表面抛光机的转速在35000—40000r/min,精抛磨料选择锆珠和洗洁精,锆珠的规格为20-30目；采用本工艺能够有效减少抛光返工量,并能够提高轮毂的机械性能。(The invention discloses a hub polishing process, which has the technical scheme that: the method specifically comprises the following steps: s1, wet shot blasting descaling: selecting 20-30 meshes of ceramic balls and water, and filling the ceramic balls and the water into a shot blasting machine to perform wet shot blasting on the hub; s2, cleaning the surface of the hub: carrying out high-pressure water injection on the surface of the hub by using a high-pressure water gun, wherein the water temperature is controlled to be 36-40 ℃; s3, rough polishing of the hub: placing the aluminum alloy wheel hub in a vibration grinding machine filled with grinding materials, wherein the grinding materials are resin, carborundum is uniformly mixed in the resin, the mass of the carborundum accounts for 25% -30% of that of the resin, and the size specifications of the resin and the carborundum are 48-96 meshes; s4, polishing the hub; s5, fine polishing of the hub: placing the aluminum alloy hub in a rotary surface polishing machine for fine polishing, controlling the rotating speed of the rotary surface polishing machine to be 35000-40000 r/min, selecting zirconium beads and detergent as fine polishing abrasive materials, wherein the specification of the zirconium beads is 20-30 meshes; by adopting the process, the polishing rework amount can be effectively reduced, and the mechanical property of the hub can be improved.)

1. A hub polishing process is characterized in that: the method specifically comprises the following steps:

s1, wet shot blasting descaling: selecting 20-30 meshes of ceramic balls and water, filling the ceramic balls and the water into a shot blasting machine, and carrying out wet shot blasting on the hub, wherein the air pressure during the wet shot blasting is controlled to be 0.9-1.0 MPa, the initial speed of the ceramic balls thrown out of the shot blasting machine is controlled to be 22-40 m/s, the flow rate of the ceramic balls sprayed out is controlled to be 0.65-0.8 kg/min, and the wet shot blasting treatment time is controlled to be 11-12 min;

s2, cleaning the surface of the hub: carrying out high-pressure water injection on the surface of the hub by using a high-pressure water gun, wherein the injection pressure of high-pressure water is 1000-1100MPA, the high-pressure injection time is 2-5min, and the water temperature is controlled to be 36-40 ℃;

s3, rough polishing of the hub: placing an aluminum alloy hub in a vibration grinding machine filled with grinding materials, wherein the grinding materials are resin, carborundum is uniformly mixed in the resin, the carborundum accounts for 25-30% of the mass of the resin, the size specification of the resin and the carborundum is 48-96 meshes, the hub rotates forwards and backwards in the vibration grinding machine and revolves in a grinding material barrel along the vibration grinding machine, the rotating speed of the forward and reverse rotation is 12-15r/min, the rotating speed of the revolution is 5-10r/min, and the vibration grinding time is 5-10min by adopting low-frequency vibration grinding of 20-30 Hz;

s4, middle casting hub: placing an aluminum alloy hub in a vibration grinding machine filled with grinding materials, wherein the grinding materials are resin, the size specification of the resin is 112-160 meshes, the hub rotates positively and negatively in the vibration grinding machine and revolves in a grinding material barrel along the vibration grinding machine, the rotating speed of the positive and negative rotation is 12-15r/min, the rotating speed of the revolution is 5-10r/min, the low-frequency vibration grinding of 20-30Hz is adopted, and the vibration grinding time is 5-10 min;

s5, fine polishing of the hub: placing the aluminum alloy wheel hub in a rotary surface polishing machine for fine polishing, controlling the rotating speed of the rotary surface polishing machine to be 35000-40000 r/min, selecting zirconium beads and detergent as a fine polishing abrasive, wherein the specification of the zirconium beads is 20-30 meshes, the mass of the detergent accounts for 4-8% of the mass of the zirconium beads, and the fine polishing time is controlled to be 30-50 min.

2. A hub polishing process according to claim 1, wherein: in the S1 wet shot blasting descaling, 24-26 meshes of ceramic balls and water are selected and injected into a shot blasting machine to perform wet shot blasting on the hub, the air pressure during the wet shot blasting is controlled to be 0.95-0.98 MPa, the initial speed of the ceramic balls thrown out of the shot blasting machine is controlled to be 30-36 m/S, the flow rate of the ceramic balls sprayed out is controlled to be 0.7-0.75 kg/min, and the wet shot blasting treatment time is controlled to be 11-12 min.

3. A hub polishing process according to claim 1, wherein: and when the hub surface is cleaned by the S2, carrying out high-pressure water injection on the hub surface by using a high-pressure water gun, wherein the injection pressure of the high-pressure water is 1030 and 1070MPA, the high-pressure injection time is 2-5min, and the water temperature is controlled to be 38 ℃.

4. A hub polishing process according to claim 1, wherein: when the hub is roughly polished by S3, the aluminum alloy hub is placed in a vibration grinding machine with grinding materials, the grinding materials are resin, the diamond grains are uniformly mixed in the resin, the diamond grains account for 27% of the mass of the resin, the size specification of the resin and the diamond grains is 60-80 meshes, the hub rotates forwards and backwards in the vibration grinding machine and revolves in a grinding material barrel along the vibration grinding machine, the rotating speed of the forward and reverse rotation is 13r/min, the revolving speed of the revolution is 8r/min, the low-frequency vibration grinding of 25Hz is adopted, and the vibration grinding time is 5-10 min.

5. A hub polishing process according to claim 1, wherein: and when the hub is thrown in the S4, the aluminum alloy hub is placed in a vibration grinding machine filled with grinding materials, the grinding materials are resin, the size specification of the resin is 130-140 meshes, the hub rotates forwards and backwards in the vibration grinding machine and revolves in a grinding material barrel along the vibration grinding machine, the rotating speed of the forward and reverse rotation is 13r/min, the revolving speed is 8r/min, the low-frequency vibration grinding of 25Hz is adopted, and the vibration grinding time is 5-10 min.

6. A hub polishing process according to claim 1, wherein: when the hub is finely polished by S5, the aluminum alloy hub is placed in a rotary surface polishing machine for fine polishing, the rotating speed of the rotary surface polishing machine is controlled to be 35000-37000 r/min, zirconium beads and detergent are selected as the fine polishing abrasive, the specification of the zirconium beads is 23-28 meshes, the mass of the detergent accounts for 6% of the mass of the zirconium beads, and the fine polishing time is controlled to be 30-50 min.

7. A hub polishing process according to claim 1, wherein: and after the step S6, performing fine grinding on the hub, performing roughness inspection on the surface of the hub during the fine grinding, dressing the surface of the hub with the roughness being larger than Ra1.6, and selecting 400-800 # water sand paper for modification and grinding until the roughness meets Ra1.6.

8. A hub polishing process according to claim 1, wherein: the polishing abrasive adopted when the hub is polished by the S5 method is selected from zirconium beads and detergent, and brown corundum grinding stones which account for 20-30% of the mass of the zirconium beads are added, wherein the meshes of the brown corundum grinding stones are 30-40 meshes.

Technical Field

The invention relates to the field of hub polishing, in particular to a hub polishing process.

Background

Common automobile hubs include steel hubs and aluminum alloy hubs. The steel hub has high strength and is commonly used for large trucks; however, the steel hub has heavy mass and single appearance, is not in line with the current low-carbon and fashionable concepts, and is gradually replaced by the aluminum alloy hub.

The hub is polished, so that the surface of the hub is smoother, and the surface of the processed hub has corrosion resistance and wear resistance. Currently, polishing methods commonly used in the production process are mainly classified into manual polishing, mechanical polishing, electrolytic polishing and chemical polishing.

The prior Chinese patent with publication number CN107214063A discloses an aluminum alloy hub polishing color registering process, which comprises the following specific process flows: polishing blank → pretreatment → spraying transparent powder 1 → curing → placing hard protection → spraying color paint → curing → lower line grinding color register boundary line → pretreatment → spraying transparent powder 2 → curing lower line.

The aluminum alloy hub polishing and color registering process solves the problems that the polishing surface is easy to scratch in the color registering boundary treatment process and the treatment efficiency is low in the traditional polishing and color registering product, improves the finished product rate and the production efficiency of the polishing and color registering product, and increases the added value of the product.

However, the polishing and color registering process for the aluminum alloy wheel hub still has some disadvantages, such as: firstly, descaling operation is not carried out before polishing, so that pits are easily generated on subsequently polished hubs, and the complexity of subsequent polishing is improved; secondly, shot blasting adopted in the common descaling process is drying shot blasting, which can cause the temperature of the hub to rise, and for the hub, the heating treatment can affect the grain size of the surface of the hub; third, the common polishing process adopts more polishing materials, wastes more and has higher cost.

Disclosure of Invention

In view of the problems mentioned in the background, it is an object of the present invention to provide a hub polishing process to solve the problems mentioned in the background.

The technical purpose of the invention is realized by the following technical scheme:

a hub polishing process specifically comprises the following steps:

s1, wet shot blasting descaling: selecting 20-30 meshes of ceramic balls and water, filling the ceramic balls and the water into a shot blasting machine, and carrying out wet shot blasting on the hub, wherein the air pressure during the wet shot blasting is controlled to be 0.9-1.0 MPa, the initial speed of the ceramic balls thrown out of the shot blasting machine is controlled to be 22-40 m/s, the flow rate of the ceramic balls sprayed out is controlled to be 0.65-0.8 kg/min, and the wet shot blasting treatment time is controlled to be 11-12 min;

s2, cleaning the surface of the hub: carrying out high-pressure water injection on the surface of the hub by using a high-pressure water gun, wherein the injection pressure of high-pressure water is 1000-1100MPA, the high-pressure injection time is 2-5min, and the water temperature is controlled to be 36-40 ℃;

s3, rough polishing of the hub: placing an aluminum alloy hub in a vibration grinding machine filled with grinding materials, wherein the grinding materials are resin, carborundum is uniformly mixed in the resin, the carborundum accounts for 25-30% of the mass of the resin, the size specification of the resin and the carborundum is 48-96 meshes, the hub rotates forwards and backwards in the vibration grinding machine and revolves in a grinding material barrel along the vibration grinding machine, the rotating speed of the forward and reverse rotation is 12-15r/min, the rotating speed of the revolution is 5-10r/min, and the vibration grinding time is 5-10min by adopting low-frequency vibration grinding of 20-30 Hz;

s4, middle casting hub: placing an aluminum alloy hub in a vibration grinding machine filled with grinding materials, wherein the grinding materials are resin, the size specification of the resin is 112-160 meshes, the hub rotates positively and negatively in the vibration grinding machine and revolves in a grinding material barrel along the vibration grinding machine, the rotating speed of the positive and negative rotation is 12-15r/min, the rotating speed of the revolution is 5-10r/min, the low-frequency vibration grinding of 20-30Hz is adopted, and the vibration grinding time is 5-10 min;

s5, fine polishing of the hub: placing the aluminum alloy wheel hub in a rotary surface polishing machine for fine polishing, controlling the rotating speed of the rotary surface polishing machine to be 35000-40000 r/min, selecting zirconium beads and detergent as a fine polishing abrasive, wherein the specification of the zirconium beads is 20-30 meshes, the mass of the detergent accounts for 4-8% of the mass of the zirconium beads, and the fine polishing time is controlled to be 30-50 min.

Preferably, in the step of removing the scale by wet shot blasting of S1, ceramic balls with 24-26 meshes and water are selected and injected into a shot blasting machine to perform wet shot blasting on the hub, the air pressure during the wet shot blasting is controlled to be 0.95-0.98 MPa, the initial speed of the ceramic balls thrown out of the shot blasting machine is controlled to be 30-36 m/S, the flow rate of the ceramic balls sprayed out is controlled to be 0.7-0.75 kg/min, and the processing time of the wet shot blasting is controlled to be 11-12 min.

Preferably, when the hub surface is cleaned in S2, a high-pressure water gun is used to spray high-pressure water onto the hub surface, the spraying pressure of the high-pressure water is 1030 and 1070MPA, the high-pressure spraying time is 2-5min, and the water temperature is controlled to be 38 ℃.

Preferably, when the hub is roughly polished by the method of S3, the aluminum alloy hub is placed in a vibration grinding machine with grinding materials, the grinding materials are resin, carborundum is uniformly mixed in the resin, the mass of the carborundum accounts for 27% of the mass of the resin, the size specification of the resin and the carborundum is 60-80 meshes, the hub rotates forwards and backwards in the vibration grinding machine and revolves in a grinding material barrel along the vibration grinding machine, the rotating speed of the forward and reverse rotation is 13r/min, the revolving speed of the revolution is 8r/min, the hub is ground by low-frequency vibration of 25Hz, and the vibration grinding time is 5-10 min.

Preferably, when the hub is polished in the step S4, the aluminum alloy hub is placed in a vibration grinding machine filled with grinding materials, the grinding materials are resin, the size specification of the resin is 130-140 meshes, the hub rotates forwards and backwards in the vibration grinding machine and revolves around the vibration grinding machine in a grinding material barrel, the rotating speed of the forward and reverse rotation is 13r/min, the revolving speed of the revolution is 8r/min, low-frequency vibration grinding at 25Hz is adopted, and the vibration grinding time is 5-10 min.

Preferably, when the hub is finely polished by S5, the aluminum alloy hub is placed in a rotary surface polishing machine for fine polishing, the rotating speed of the rotary surface polishing machine is controlled to be 35000-37000 r/min, zirconium beads and detergent are selected as the fine polishing abrasive, the specification of the zirconium beads is 23-28 meshes, the mass of the detergent accounts for 6% of the mass of the zirconium beads, and the fine polishing time is controlled to be 30-50 min.

Preferably, the hub is finely ground after the step S6, during the fine grinding, the surface of the hub is firstly subjected to roughness inspection, the surface of the hub with the roughness greater than ra1.6 is refitted, and during the trimming, 400-.

Preferably, the polishing abrasive used in the step of polishing the hub by the polishing machine S5 is selected from zirconium beads and detergent, and further added with brown corundum grinding stones accounting for 20-30% of the mass of the zirconium beads, wherein the meshes of the brown corundum grinding stones are 30-40 meshes.

In summary, the invention mainly has the following beneficial effects:

firstly, the wet shot blasting descaling operation is adopted for the hub before grinding and polishing, the wet shot blasting adopted by the operation has the capability of processing the scale rapidly when the scale is processed, and the conventional shot blasting time can be shortened by controlling the speed, flow and time of shot blasting;

secondly, the hub is cleaned by high-pressure water after the oxide skin is removed, so that the condition of grinding rework caused by the existence of some particles on the surface of the hub during grinding can be avoided;

thirdly, the grinding materials adopted in the coarse grinding process of the process are resin and carborundum, so that compared with the traditional method of adopting resin, the grinding force is increased, and the coarse grinding efficiency can be improved;

fourthly, zirconium beads and detergent are selected as the fine polishing abrasive used in the fine polishing process, the process is completely different from the traditional fine polishing abrasive, the adopted detergent is a low-price article, the zirconium beads can be recycled, the utilization rate is high, the zirconium beads can be reused after being cleaned, and the cost is reduced.

Drawings

Figure 1 is a process frame of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.