阅读说明：本技术 一种用于地铁车辆刹车系统的铝制储气罐的制作方法 (Manufacturing method of aluminum air storage tank for subway vehicle brake system ) 是由 仲睿 赵建梅 赵建军 于 2020-07-16 设计创作，主要内容包括：本发明公开了一种用于地铁车辆刹车系统的铝制储气罐的制作方法,包括如下步骤：步骤一,铝合金原料称取；步骤二,合金熔融；步骤三,铝合金精炼；步骤四,铸模成型；步骤五,焊接成型；步骤六,成型处理；在所述步骤一中,按照比例称取硅、铜、镁、钛、铬、锰、精炼剂和铝原料；在所述步骤二中,选用熔融锅炉,将步骤一中称取的纯铝锭原料投入到熔融锅炉内；其中罐体采用铸模的方式进行成型,解决了传统储气罐巻制焊接的方式制成,焊接面较大,影响整体储气罐牢固性的问题；该储气罐的铝合金材料中钛、铬、锰、精炼剂等原料的加入提高了成品储气罐的抗拉强度和延展性,使储气罐具有更好的承受静载荷和冲击载荷。(The invention discloses a manufacturing method of an aluminum air storage tank for a subway vehicle brake system, which comprises the following steps: step one, weighing aluminum alloy raw materials; step two, melting the alloy; step three, refining the aluminum alloy; step four, casting and molding; step five, welding and forming; step six, forming treatment; in the first step, silicon, copper, magnesium, titanium, chromium, manganese, a refining agent and an aluminum raw material are weighed according to the proportion; in the second step, a melting boiler is selected, and the pure aluminum ingot raw material weighed in the first step is put into the melting boiler; the tank body is formed in a casting mold mode, so that the problem that the firmness of the whole gas storage tank is influenced due to a large welding surface caused by a winding welding mode of the traditional gas storage tank is solved; the addition of raw materials such as titanium, chromium, manganese, refining agent and the like in the aluminum alloy material of the gas storage tank improves the tensile strength and ductility of the finished gas storage tank, so that the gas storage tank can better bear static load and impact load.)

1. A manufacturing method of an aluminum air storage tank for a braking system of a subway vehicle comprises the following steps: step one, weighing aluminum alloy raw materials; step two, melting the alloy; step three, refining the aluminum alloy; step four, casting and molding; step five, welding and forming; step six, forming treatment; the method is characterized in that:

in the first step, silicon, copper, magnesium, titanium, chromium, manganese, a refining agent and an aluminum raw material are weighed according to the proportion;

in the second step, a melting boiler is selected, the pure aluminum ingot raw material weighed in the first step is put into the melting boiler, the working temperature of the melting boiler is controlled to be raised to 720-750 ℃, and the pure aluminum ingot is melted into aluminum liquid; adding the silicon, copper, magnesium, titanium, chromium and manganese blocks weighed in the step one into the molten boiler aluminum liquid in the step two; regulating the furnace temperature to 680-700 ℃, and melting to obtain alloy aluminum liquid;

in the third step, stirring the alloy aluminum liquid in the melting boiler in the second step, pressing the refining agent weighed in the first step into the aluminum liquid through aluminum foil coating, and controlling the boiler temperature to 680-700 ℃ for refining for 15-20min to obtain aluminum alloy molten liquid;

in the fourth step, a mould for manufacturing the tank body and the end body is designed according to the specification and the style of the gas storage tank, the aluminum alloy molten liquid obtained in the third step is injected into the mould, and the mould is used for casting and molding to obtain the tank body and the end body;

in the fifth step, the tank body and the end body obtained in the fourth step are subjected to combined welding, and each rolling end socket is welded according to the requirement to obtain an aluminum gas storage tank;

in the sixth step, the outer wall of the air storage tank obtained in the fifth step is uniformly ground and polished by a grinding machine, paint is uniformly sprayed on the ground and polished outer wall of the air storage tank, and the air storage tank is dried to obtain a finished product of an aluminum air storage tank; the finished product aluminum gas storage tank is integrally observed and detected, the gas tightness and the pressure bearing performance of the gas storage tank are detected, unqualified products are reworked and scrapped, and the qualified aluminum gas storage tank is packaged and stored.

2. The manufacturing method of the aluminum air storage tank for the braking system of the metro vehicle as claimed in claim 1, wherein the manufacturing method comprises the following steps: the weight percentages of the raw materials in the step one are as follows: 4.8 percent of silicon, 0.5 to 1.5 percent of copper, 0.8 to 1.4 percent of magnesium, 0.2 to 0.5 percent of titanium, 0.4 to 1.4 percent of chromium, 0.8 to 1.8 percent of manganese, 1.2 to 2 percent of refining agent and the balance of aluminum.

3. The manufacturing method of the aluminum air storage tank for the braking system of the metro vehicle as claimed in claim 1, wherein the manufacturing method comprises the following steps: the refining agent in the first step can be potassium chloride and potassium carbonate, and the weight ratio of the potassium chloride to the potassium carbonate is 4: 1.

4. The manufacturing method of the aluminum air storage tank for the braking system of the metro vehicle as claimed in claim 1, wherein the manufacturing method comprises the following steps: and in the second step and the third step, nitrogen is injected into the boiler during the melting process of the boiler.

5. The manufacturing method of the aluminum air storage tank for the braking system of the metro vehicle as claimed in claim 1, wherein the manufacturing method comprises the following steps: and in the third step, the surface of the alloy aluminum liquid is subjected to slagging-off treatment in the refining process of the aluminum alloy molten liquid.

6. The manufacturing method of the aluminum air storage tank for the braking system of the metro vehicle as claimed in claim 1, wherein the manufacturing method comprises the following steps: and in the sixth step, after the surface of the gas storage tank is sprayed with paint, drying the paint sprayed on the surface of the gas storage tank by using a dryer.

7. The manufacturing method of the aluminum air storage tank for the braking system of the metro vehicle as claimed in claim 1, wherein the manufacturing method comprises the following steps: and fifthly, grinding and polishing the connecting surface of the tank body and the end body before combined welding.

8. The manufacturing method of the aluminum air storage tank for the braking system of the metro vehicle as claimed in claim 1, wherein the manufacturing method comprises the following steps: and fifthly, polishing the welding seam after the combination welding, blowing away the ground powder on the surface after polishing, wiping off the oxide on the surface by using acetone, and removing welding slag.

Technical Field

The invention relates to the technical field of air storage tank manufacturing, in particular to a manufacturing method of an aluminum air storage tank for a subway vehicle brake system.

Background

The subway is a rapid, large-traffic and electric power traction rail transit built in cities; the train runs on a totally closed line, the line positioned in a central urban area is basically arranged in an underground tunnel, the line outside the central urban area is generally arranged on a viaduct or the ground, and the subway is an urban rail transit system which covers various underground and overground rights of roads in the urban area, has high density and high transportation capacity; the brake system of the subway vehicle is usually carried out in a pneumatic mode, so that the air storage tank is a main component on the subway, and the air storage tank used for the traditional subway vehicle brake system is mostly made of aluminum alloy, so that the pressure-bearing strength and the corrosion resistance of the manufactured finished product are general; the traditional aluminum gas storage tank is formed by blanking, winding, welding a cylindrical barrel and rolling and welding two end sockets by adopting a steel plate material; the welding surface of the traditional winding welding mode of the gas storage tank is large, so that the firmness of the whole gas storage tank is influenced; therefore, the manufacturing method of the aluminum air storage tank for the subway vehicle brake system is significant.

Disclosure of Invention

The invention aims to provide a manufacturing method of an aluminum air storage tank for a braking system of a subway vehicle, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a manufacturing method of an aluminum air storage tank for a braking system of a subway vehicle comprises the following steps: step one, weighing aluminum alloy raw materials; step two, melting the alloy; step three, refining the aluminum alloy; step four, casting and molding; step five, welding and forming; step six, forming treatment;

in the first step, silicon, copper, magnesium, titanium, chromium, manganese, a refining agent and an aluminum raw material are weighed according to the proportion;

in the second step, a melting boiler is selected, the pure aluminum ingot raw material weighed in the first step is put into the melting boiler, the working temperature of the melting boiler is controlled to be raised to 720-750 ℃, and the pure aluminum ingot is melted into aluminum liquid; adding the silicon, copper, magnesium, titanium, chromium and manganese blocks weighed in the step one into the molten boiler aluminum liquid in the step two; regulating the furnace temperature to 680-700 ℃, and melting to obtain alloy aluminum liquid;

in the third step, stirring the alloy aluminum liquid in the melting boiler in the second step, pressing the refining agent weighed in the first step into the aluminum liquid through aluminum foil coating, and controlling the boiler temperature to 680-700 ℃ for refining for 15-20min to obtain aluminum alloy molten liquid;

in the fourth step, a mould for manufacturing the tank body and the end body is designed according to the specification and the style of the gas storage tank, the aluminum alloy molten liquid obtained in the third step is injected into the mould, and the mould is used for casting and molding to obtain the tank body and the end body;

in the fifth step, the tank body and the end body obtained in the fourth step are subjected to combined welding, and each rolling end socket is welded according to the requirement to obtain an aluminum gas storage tank;

in the sixth step, the outer wall of the air storage tank obtained in the fifth step is uniformly ground and polished by a grinding machine, paint is uniformly sprayed on the ground and polished outer wall of the air storage tank, and the air storage tank is dried to obtain a finished product of an aluminum air storage tank; the finished product aluminum gas storage tank is integrally observed and detected, the gas tightness and the pressure bearing performance of the gas storage tank are detected, unqualified products are reworked and scrapped, and the qualified aluminum gas storage tank is packaged and stored.

Preferably, the raw materials in the first step have the following weight percentages: 4.8 percent of silicon, 0.5 to 1.5 percent of copper, 0.8 to 1.4 percent of magnesium, 0.2 to 0.5 percent of titanium, 0.4 to 1.4 percent of chromium, 0.8 to 1.8 percent of manganese, 1.2 to 2 percent of refining agent and the balance of aluminum.

Preferably, the refining agent in the first step can be potassium chloride and potassium carbonate, and the weight ratio of the potassium chloride to the potassium carbonate is 4: 1.

Preferably, nitrogen is injected into the boiler during the melting process of the boiler in the second step and the third step.

Preferably, in the third step, the surface of the alloy aluminum liquid is subjected to slagging-off treatment in the refining process of the aluminum alloy molten liquid.

Preferably, in the sixth step, after the paint is sprayed on the surface of the air storage tank, the paint sprayed on the surface of the air storage tank is dried by a dryer.

Preferably, in the fifth step, the connecting surface of the tank body and the end body is ground and polished before the combination welding.

Preferably, in the fifth step, after the combined welding, the welding seam is polished, the ground powder on the surface is blown off after polishing, the oxide on the surface is wiped off by acetone, and welding slag is removed.

Compared with the prior art, the invention has the beneficial effects that:

(1) the tank body is formed in a casting mold mode, so that the problem that the firmness of the whole gas storage tank is influenced due to a large welding surface caused by a winding welding mode of the traditional gas storage tank is solved;

(2) the addition of the raw materials such as titanium, chromium, manganese, refining agent and the like in the aluminum alloy material of the gas storage tank improves the tensile strength and ductility of the finished product gas storage tank, so that the gas storage tank can better bear static load and impact load;

(3) the manufacturing method of the gas storage tank is standardized, and the precision and the finished product quality of the gas storage tank are improved.

Drawings

FIG. 1 is a flow chart of a method of making 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.

Referring to fig. 1, an embodiment of the present invention: a manufacturing method of an aluminum air storage tank for a braking system of a subway vehicle comprises the following steps: step one, weighing aluminum alloy raw materials; step two, melting the alloy; step three, refining the aluminum alloy; step four, casting and molding; step five, welding and forming; step six, forming treatment;

in the first step, silicon, copper, magnesium, titanium, chromium, manganese, a refining agent and an aluminum raw material are weighed according to a proportion;

in the second step, a melting boiler is selected, the pure aluminum ingot raw material weighed in the first step is put into the melting boiler, the working temperature of the melting boiler is controlled to be raised to 720-750 ℃, and the pure aluminum ingot is melted into aluminum liquid; adding the silicon, copper, magnesium, titanium, chromium and manganese blocks weighed in the step one into the molten boiler aluminum liquid in the step two; regulating the furnace temperature to 680-700 ℃, and melting to obtain alloy aluminum liquid;

in the third step, stirring the alloy aluminum liquid in the melting boiler in the second step, pressing the refining agent weighed in the first step into the aluminum liquid through aluminum foil coating, and controlling the boiler temperature to 680-700 ℃ for refining for 15-20min to obtain aluminum alloy molten liquid;

in the fourth step, a mould for manufacturing the tank body and the end body is designed according to the specification and the style of the gas storage tank, the molten aluminum alloy obtained in the third step is injected into the mould, and the mould is used for casting and molding to obtain the tank body and the end body;

in the fifth step, the tank body and the end body obtained in the fourth step are subjected to combined welding, and each rolling end socket is welded according to the requirement to obtain an aluminum gas storage tank;

in the sixth step, the outer wall of the air storage tank obtained in the fifth step is uniformly ground and polished by a grinding machine, paint is uniformly sprayed on the ground and polished outer wall of the air storage tank, and the air storage tank is dried to obtain a finished product of an aluminum air storage tank; the finished product aluminum gas storage tank is integrally observed and detected, the gas tightness and the pressure bearing performance of the gas storage tank are detected, unqualified products are reworked and scrapped, and the qualified aluminum gas storage tank is packaged and stored.

Referring to fig. 1, the raw materials in the first step are in weight percentage: 4.8 percent of silicon, 0.5 to 1.5 percent of copper, 0.8 to 1.4 percent of magnesium, 0.2 to 0.5 percent of titanium, 0.4 to 1.4 percent of chromium, 0.8 to 1.8 percent of manganese, 1.2 to 2 percent of refining agent and the balance of aluminum.

Referring to fig. 1, the refining agent in the first step may be potassium chloride and potassium carbonate, and the weight ratio of potassium chloride to potassium carbonate is 4: 1.

Referring to fig. 1, nitrogen gas is injected into the interior of the boiler during the melting process of the boiler in the second and third steps.

Referring to fig. 1, in the third step, the surface of the alloy molten aluminum is subjected to slagging-off treatment in the refining process of the aluminum alloy molten liquid.

Referring to fig. 1, in the sixth step, after the paint is sprayed on the surface of the air storage tank, the paint sprayed on the surface of the air storage tank is dried by a dryer.

Referring to fig. 1, in step five, the connecting surface of the tank body and the end body is ground and polished before the combination welding.

And (5) polishing the welding seam after the combination welding in the fifth step, blowing the ground powder on the surface after polishing, wiping the oxide on the surface by using acetone, and removing welding slag, as shown in fig. 1.

Compared with the prior art, the manufacturing method of the aluminum air storage tank for the subway vehicle brake system has the following beneficial effects:

the invention provides a manufacturing method of an aluminum gas storage tank, which is characterized in that a traditional glass fiber mesh cloth production process is innovatively improved, wherein a tank body is formed in a casting mold mode, and the problem that the firmness of the whole gas storage tank is influenced due to the fact that a traditional gas storage tank is formed in a winding and welding mode, and a welding surface is large is solved; the addition of the raw materials such as titanium, chromium, manganese, refining agent and the like in the aluminum alloy material of the gas storage tank improves the tensile strength and ductility of the finished product gas storage tank, so that the gas storage tank can better bear static load and impact load; and the manufacturing method of the gas storage tank is standardized, so that the precision and the finished product quality of the gas storage tank are improved.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.