阅读说明：本技术 一种铝合金表面处理工艺 (Aluminum alloy surface treatment process ) 是由 于涛瑞 于 2021-10-19 设计创作，主要内容包括：本发明涉及铝合金表面处理技术领域,更具体的说是一种铝合金表面处理工艺；能够避免出现死角而没有被完全进行处理,该工艺包括以下步骤：步骤一：将铝合金零件浸入到的氢氧化钠溶液中进行脱脂、碱蚀,去除表面油脂；步骤二：将铝合金零件进行的纯水洗,洗掉表面附着的氢氧化钠溶液；步骤三：将铝合金零件浸入到硫酸溶液中对铝合金零件表面的氧化皮进行清理；步骤四：再次对铝合金零件进行纯水洗,洗掉表面附着的硫酸溶液；步骤五：将铝合金零件浸入到含铬、镍的电镀溶液当中进行电镀,在铝合金表面形成一层保护膜。(The invention relates to the technical field of aluminum alloy surface treatment, in particular to an aluminum alloy surface treatment process; dead corners can be avoided without being completely treated, and the process comprises the following steps: the method comprises the following steps: immersing the aluminum alloy part into a sodium hydroxide solution for degreasing and alkaline etching to remove surface grease; step two: washing the aluminum alloy part with pure water to remove the sodium hydroxide solution attached to the surface; step three: immersing the aluminum alloy part into a sulfuric acid solution to clean oxide skin on the surface of the aluminum alloy part; step four: pure water washing is carried out on the aluminum alloy part again, and sulfuric acid solution attached to the surface is washed away; step five: and immersing the aluminum alloy part into an electroplating solution containing chromium and nickel for electroplating to form a layer of protective film on the surface of the aluminum alloy.)

1. An aluminum alloy surface treatment process is characterized by comprising the following steps:

the method comprises the following steps: immersing the aluminum alloy part into a sodium hydroxide solution for degreasing and alkaline etching to remove surface grease;

step two: washing the aluminum alloy part with pure water to remove the sodium hydroxide solution attached to the surface;

step three: immersing the aluminum alloy part into a sulfuric acid solution to clean oxide skin on the surface of the aluminum alloy part;

step four: pure water washing is carried out on the aluminum alloy part again, and sulfuric acid solution attached to the surface is washed away;

step five: and immersing the aluminum alloy part into an electroplating solution containing chromium and nickel for electroplating to form a layer of protective film on the surface of the aluminum alloy.

2. The aluminum alloy surface treatment process according to claim 1, characterized in that: in the second step to the fifth step, the temperature ranges of the sodium hydroxide solution, the pure water, the sulfuric acid solution and the electroplating solution containing chromium and nickel are 20 ℃ to 30 ℃.

3. The aluminum alloy surface treatment process according to claim 1, characterized in that: the aluminum alloy surface treatment process also relates to an aluminum alloy surface treatment device, which comprises a soaking pool and a moving part, wherein the moving part can drive the aluminum alloy part to be soaked in the soaking pool.

4. The aluminum alloy surface treatment process according to claim 3, characterized in that: the action part comprises four arc plates (01) and four middle shafts (03), the four middle shafts (03) can respectively drive the four arc plates (01) to rotate around the axis of the arc plates (01), a plurality of clamping rods (02) are arranged on the four arc plates (01) in a sliding mode, and springs are arranged between the clamping rods (02) and the arc plates (01).

5. The aluminum alloy surface treatment process according to claim 4, characterized in that: the arc plate (01) is of an arc-shaped structure.

6. The aluminum alloy surface treatment process according to claim 4, characterized in that: the moving part further comprises four hanging plates (04), four friction wheels (07) and four friction plates (08), wherein the four hanging plates (04) are respectively provided with the friction plates (08), four middle shafts (03) respectively slide on the four hanging plates (04), the four friction wheels (07) are respectively fixedly connected to the four middle shafts (03), and the four friction wheels (07) are respectively in friction contact with the four friction plates (08).

7. The aluminum alloy surface treatment process according to claim 6, characterized in that: lifting and shrinking rods (06) are arranged on the four lifting plates (04), a bearing (16) is fixedly connected to each lifting and shrinking rod (06), and each middle shaft (03) is fixedly connected to an inner ring of each bearing (16).

8. The aluminum alloy surface treatment process according to claim 7, characterized in that: the action part further comprises four threaded sleeves (05), two cross beams (09) and two lead screws I (10), the two lead screws I (10) are respectively connected to the two cross beams (09), each hanging plate (04) is provided with one threaded sleeve (05), and two ends of each lead screw I (10) are in threaded connection with one threaded sleeve (05).

9. The aluminum alloy surface treatment process according to claim 8, characterized in that: the moving part further comprises a moving beam (11) and a screw rod II (12), the screw rod II (12) is connected to the moving beam (11) in a switching mode, the two cross beams (09) are respectively in threaded connection with the two sides of the screw rod II (12), and the two cross beams (09) slide on the moving beam (11).

10. The aluminum alloy surface treatment process according to claim 9, characterized in that: the moving part also comprises a moving screw rod (14) and a support (15), the moving screw rod (14) is connected to the support (15) in a switching mode, the soaking pool is arranged on the support (15), an air cylinder (13) is arranged on the moving screw rod (14), and a moving beam (11) is fixedly connected to an air cylinder rod of the air cylinder (13).

Technical Field

The invention relates to the technical field of aluminum alloy surface treatment, in particular to an aluminum alloy surface treatment process.

Background

An aluminum alloy, which is an alloy based on aluminum with a certain amount of other alloying elements added, is one of light metal materials; in the existing industrial production, parts made of aluminum alloy can be stained with industrial oil in the processing process, so that grease adheres to the surface of the aluminum alloy parts, and meanwhile, the aluminum alloy parts are always exposed in the air and can react with the air and the water to generate oxide skin, so that the performance of the aluminum alloy parts in the subsequent processing is influenced.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the aluminum alloy surface treatment process, which avoids dead corners and is not completely treated.

The technical scheme adopted by the invention for solving the technical problems is as follows:

an aluminum alloy surface treatment process, which comprises the following steps:

the method comprises the following steps: immersing the aluminum alloy part into a sodium hydroxide solution for degreasing and alkaline etching to remove surface grease;

step two: washing the aluminum alloy part with pure water to remove the sodium hydroxide solution attached to the surface;

step three: immersing the aluminum alloy part into a sulfuric acid solution to clean oxide skin on the surface of the aluminum alloy part;

step four: pure water washing is carried out on the aluminum alloy part again, and sulfuric acid solution attached to the surface is washed away;

step five: and immersing the aluminum alloy part into an electroplating solution containing chromium and nickel for electroplating to form a layer of protective film on the surface of the aluminum alloy.

In the further steps from the second step to the fifth step, the temperature ranges of the sodium hydroxide solution, the pure water, the sulfuric acid solution and the electroplating solution containing chromium and nickel are 20 ℃ to 30 ℃.

The aluminum alloy surface treatment process further relates to an aluminum alloy surface treatment device which comprises a soaking pool and a moving part, wherein the moving part can drive the aluminum alloy part to be soaked in the soaking pool.

Drawings

The invention is described in further detail below with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a flow chart of the aluminum alloy surface treatment process in the present invention;

FIG. 2 is a schematic structural view of a soaking tank according to the present invention;

FIG. 3 is a schematic view of the structure of the arc plate and the clamping rod of the present invention;

FIG. 4 is a schematic view of the hanger plate and the bottom bracket of the present invention;

FIG. 5 is a schematic structural view of a friction wheel and a friction plate according to the present invention;

FIG. 6 is a schematic structural view of a telescopic rod and a bearing according to the present invention;

FIG. 7 is a schematic view of the hanger plate of the present invention;

FIG. 8 is a schematic structural view of a cross beam and a screw rod I in the invention;

FIG. 9 is a schematic structural view of a traveling beam and a screw II in the present invention;

FIG. 10 is a schematic view of the construction of the mobile screw and the bracket according to the present invention;

FIG. 11 is a schematic view showing the structure of an aluminum alloy surface treatment apparatus according to the present invention.

Detailed Description

Referring to FIG. 1, one exemplary operation that may be performed to treat the surface of an aluminum alloy part is shown:

the surface of the existing aluminum alloy part is stained with grease and dust in the manufacturing and processing processes, and oxide skin is generated under the condition of contacting with air and water, and the oxide skin, the grease and the dust need to be cleaned, therefore, the invention firstly immerses the aluminum alloy part into a sodium hydroxide solution for degreasing and alkaline etching to remove the grease on the surface, then carries out pure water washing on the aluminum alloy part to wash away the sodium hydroxide solution attached to the surface, then immerses the aluminum alloy part into a sulfuric acid solution to clean the oxide skin on the surface of the aluminum alloy part, carries out pure water washing on the aluminum alloy part again to wash away the sulfuric acid solution attached to the surface, finally immerses the aluminum alloy part into a plating solution containing chromium and nickel for plating, forms a layer of protective film on the surface of the aluminum alloy, thereby cleaning the oxide skin, the grease and the dust on the surface of the aluminum alloy part, after electroplating, a chromium-nickel-containing electroplating solution is used for forming a chromium-nickel-containing metal protective layer on the surface of the aluminum alloy, so that the surface of the aluminum alloy is treated and does not contact with air and water to generate oxide skin, the adhesion between paint and powder and the surface of the aluminum alloy part can be better finished in the subsequent processes of processing, spraying paint or powder spraying and the like of the aluminum alloy part, and the adhesive property between the paint and powder and the surface of the aluminum alloy part can be improved.

Referring to FIG. 1, an exemplary process for better treating the surface of an aluminum alloy part is shown:

when the surface of the aluminum alloy is treated, the temperature of the aluminum alloy also influences the treatment effect of the sodium hydroxide solution, the sulfuric acid solution and the electroplating solution containing chromium and nickel, so that in order to better treat the surface of the aluminum alloy part, in the steps from the second step to the fifth step of the invention, the temperature range of the sodium hydroxide solution, the pure water, the sulfuric acid solution and the electroplating solution containing chromium and nickel is 24 ℃, so that the temperature of the aluminum alloy part is kept constant when the aluminum alloy part is treated, and the stable reaction of the aluminum alloy part can be ensured when the aluminum alloy part is treated in the sodium hydroxide solution, the sulfuric acid solution and the electroplating solution containing chromium and nickel.

Referring to FIGS. 2 and 3, one exemplary process by which a clamped aluminum alloy part may be processed is shown:

the aluminum alloy surface treatment process also relates to an aluminum alloy surface treatment device, which comprises a soaking pool and a moving part, wherein the moving part can drive the aluminum alloy part to be soaked in the soaking pool; the action part comprises four arc plates 01 and four middle shafts 03, the four middle shafts 03 can respectively drive the four arc plates 01 to rotate around the axis of the arc plates 01, a plurality of clamping rods 02 are respectively arranged on the four arc plates 01 in a sliding mode, and springs are respectively arranged between the clamping rods 02 and the arc plates 01; in operation, only four middle shafts 03 need to be placed on two symmetrical sides of the aluminum alloy part respectively, and then two middle shafts 03 on opposite sides are close to each other, so that the four arc plates 01 are close to the aluminum alloy part together, and the aluminum alloy part is clamped by attaching the clamping rods 02 on each arc plate 01 to the surface of the aluminum alloy part, thereby realizing the soaking treatment of the aluminum alloy part in the soaking pool.

Referring to FIGS. 4 and 5, an exemplary operation for avoiding the dead angle on the surface of the aluminum alloy part is shown as follows:

when a common clamp clamps an aluminum alloy part for soaking, the clamp is always attached to the clamping position of the aluminum alloy part, so that sodium hydroxide solution, pure water, sulfuric acid solution and electroplating solution containing chromium and nickel cannot enter the place where the common clamp is attached to the aluminum alloy part, and dead corners which are not treated appear; the arc plate 01 is of an arc-shaped structure, the four middle shafts 03 can respectively drive the four arc plates 01 to rotate around the axis of the arc plate 01, and during soaking, only each middle shaft 03 needs to be driven to rotate, so that the arc plate 01 drives the plurality of clamping rods 02 on the arc plate 01, the plurality of clamping rods 02 release the part for initially clamping the aluminum alloy part and clamp the part at other positions on the surface of the aluminum alloy part, the plurality of clamping rods 02 are prevented from being always clamped at fixed positions on the surface of the aluminum alloy part, and the positions on the surface of the aluminum alloy part, which cannot be soaked by sodium hydroxide solution, pure water, sulfuric acid solution and electroplating solution containing chromium and nickel, are avoided.

Referring to FIGS. 6-8, an exemplary process for automatically shifting the clamping position of the surface of an aluminum alloy part is shown:

in order to save manpower and material resources and realize automation, the moving part further comprises four hanging plates 04, four friction wheels 07 and four friction plates 08, wherein the four hanging plates 04 are all provided with the friction plates 08, four middle shafts 03 respectively slide on the four hanging plates 04, the four friction wheels 07 are respectively fixedly connected on the four middle shafts 03, the four friction wheels 07 are respectively in friction contact with the four friction plates 08, the four hanging plates 04 are respectively provided with a lifting and contracting rod 06, each lifting and contracting rod 06 is fixedly connected with a bearing 16, and each middle shaft 03 is fixedly connected in an inner ring of each bearing 16; therefore, during operation, each lifting and contracting rod 06 is only needed to be used for simultaneously driving each bearing 16 to horizontally move, so that each bearing 16 drives each middle shaft 03 to move, each middle shaft 03 can drive a friction wheel 07 on the middle shaft 03 to generate friction with a corresponding friction plate 08 when moving, each friction wheel 07 drives each middle shaft 03 to rotate, each middle shaft 03 finally drives each arc plate 01 to rotate, the clamping positions of the clamping rods 02 on each arc plate 01, which are clamped on the surface of an aluminum alloy part, are respectively replaced, and automation is realized.

Referring to FIG. 9, one exemplary process by which self-clamping aluminum alloy parts can be achieved is as follows:

the moving part also comprises four screw sleeves 05, two cross beams 09 and two screw rods I10, wherein the two screw rods I10 are respectively connected to the two cross beams 09 in a rotating mode, each hanging plate 04 is provided with one screw sleeve 05, two ends of each screw rod I10 are respectively in threaded connection with one screw sleeve 05, and the directions of threads on two sides of the same screw rod I10 are opposite; when the aluminum alloy part is clamped from two sides, only the speed reduction motor is needed to drive the screw rod I10 to rotate, so that the screw rod I10 drives the two thread sleeves 05 on the same screw rod I10 to be close to each other, the two hanging plates 04 are close to each other, and the aluminum alloy part is clamped.

Referring to FIGS. 9 and 10, one exemplary operation for obtaining a stable clamping of an aluminum alloy part is shown:

the moving part further comprises a moving beam 11 and a screw rod II 12, the screw rod II 12 is connected to the moving beam 11 in a switching mode, the two cross beams 09 are respectively in threaded connection with the two sides of the screw rod II 12, the thread directions of the two sides of the screw rod II 12 are opposite, and the two cross beams 09 slide on the moving beam 11; it is rotatory to drive II 12 of lead screw through gear motor, can realize that II 12 of lead screw drive two crossbeams 09 and be close to each other or keep away from, change the interval between two crossbeams 09 to the realization presss from both sides tightly the aluminum alloy part of equidimension not, and thereby can guarantee the stability of aluminum alloy part through pressing from four positions and pressing from both sides the tight aluminum alloy part jointly, avoid the aluminum alloy part to take place to drop.

Referring to FIGS. 3 and 11, an exemplary process according to which the surface treatment of the aluminum alloy part may be performed is as follows:

the moving part also comprises a moving screw rod 14 and a bracket 15, the moving screw rod 14 is switched on the bracket 15, the soaking pool is arranged on the bracket 15, the moving screw rod 14 is provided with an air cylinder 13, the air cylinder 13 slides on the bracket 15, and the moving beam 11 is fixedly connected on an air cylinder rod of the air cylinder 13; when the surface of the aluminum alloy part is treated, the movable screw rod 14 is driven to rotate only by using the speed reduction motor, so that the movable beam 11 is driven to move by the bracket 15, and the movable beam 11 is driven to lift by using the cylinder 13, so that the aluminum alloy part is placed into the soaking pool to be soaked.