CN106394592A

CN106394592A - Railway vehicle framework machining method

Info

Publication number: CN106394592A
Application number: CN201510422206.8A
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-07-20
Filing date: 2015-07-20
Publication date: 2017-02-15

Abstract

The invention relates to a railway vehicle framework machining method. Firstly, a metal blank of the vehicle framework is adjusted, maintained, assembled and welded, then a first time polishing process is carried out, the welding part is subjected to flaw detection, then the framework is finely machined, secondary assembly welding is carried out in dependence on the design demand, components are assembled and welded on each pedestal of the framework, then a secondary polishing process is carried out; oil stains, oxide skins and dirt on the surface of each framework are removed, after a dedusting process, priming paint and finish paint are sprayed to the surface of each framework, and the frameworks which are subjected to the spraying process are assembled. A machining method that the machining process is carried out first, then the polishing process is carried out, and finally the integral body is sprayed and assembled is employed, the metal surface of the framework is flat and smooth, the demand of surface roughness is reached, the metal surface has certain roughness, the paint adhesive force is increased, the paint surface is flat and smooth, the appearance quality of products is guaranteed, the labor intensity of workers and the production cost are reduced at the same time, the process flow is reasonable and reliable, and the production efficiency is improved.

Description

Rolling stock framework technological method for processing

Technical field

The present invention relates to a kind of rolling stock framework technological method for processing, belong to machining technology field.

Background technology

At present in the actual production process of rolling stock framework, commonly used processing technique is：Adjusting group postwelding is being carried out to car structure, is carrying out Shot Blasting, spray-applied primer, component is carried out with polish again, removes the greasy dirt of component surface, touch-up paint is carried out to the priming paint destroying in process, again by each component assembling processing, the finally technological method for processing to component integral spray finish paint.Deficiency using this technological method for processing is, when the component surface to spray-applied primer goes to degrease, typically adopt alkaline solution or solvent or diluent, also there is certain corrosiveness to the priming paint being sprayed on component surface while degreasing, so when to component spray paint, not only the surface quality of finish paint is low, and in addition the adhesive force of finish paint also can decline, and the activity duration is long, and cause certain environmental pollution；Carry out polish again after to component spray-applied primer, the destruction of part priming paint can be caused in the course of processing, needs carry out artificial touch-up paint, additionally, due to the metal surface smoother after processing, the adhesive force of paint also can reduce, so not only increased production cost, increase the labor intensity of workman, also have impact on the presentation quality of whole car structure simultaneously.It is therefore expected that there being one kind can improve product appearance quality, improve production efficiency, reduce labor strength, the technological method for processing vehicle timber support reducing production cost substitutes said method.

Content of the invention

In order to solve the above problems and not enough, the present invention proposes a kind of rolling stock framework technological method for processing, can improve product appearance quality, improve production efficiency, reduce labor strength, reduce production cost.

For achieving the above object, described rolling stock framework technological method for processing comprises the following steps：

1) adjusting is carried out to the metal blank of car structure, and assembled and weld；

2) first time polishing, scale removal, is detected a flaw in welding position, repair welding；

3) polish is carried out to the framework through organizing postwelding, be processed into the shape and size meeting design requirement；

4) need to carry out secondary group of weldering according to design, each parts are assembled on each base of framework, and and tube chamber welds with base；

5) second polishing, removes greasy dirt, the oxide skin on framework surface, and dirt；

6) dust removal process is carried out to framework surface；

8) to framework surface spraying finish paint, it is dried process afterwards；

9) framework having been carried out spray treatment is assembled.

When carrying out described first time and second Shot Blasting, shot using diameter l～2mm, ejection velocity is 80～100 meter per seconds, and the ball blast time of first time polishing is less than or equal to 5 minutes, and the ball blast time of second polishing is more than or equal to 20 minutes.Shot Blasting twice also respectively can be in the way of being mixed with steel wire section using shot, and steel wire section is 3 with the ratio of number of shot：1, a diameter of 1mm of steel wire section, the length of steel wire section is l～2mm.

So framework metal surface, after Shot Blasting of the mat woven of fine bamboo strips, can effectively remove the oxide skin of face of weld, the flaw detection meeting face of weld requires, and finds out solder skip, rosin joint, carry out repair welding in time.After second polishing, surfacing is smooth for framework metal surface, and more preferably, the roughness of framework metal surface can reduce effect further, reaches the requirement of surface roughness.

When carrying out second polishing, the surface being greater than or equal to 7um to surface roughness requirements is processed by shot blasting, surface roughness requirements is less than to the surface of 7um, before carrying out second polishing, these surfaces is carried out protective treatment with protective cover.

Through second polishing operation, because polishing time is longer, effectively eliminate greasy dirt, oxide skin and the dirt on framework surface, not only make the metal surface flat smooth of framework, reach the requirement of Metal Surface Roughness, framework surface can also be made to have certain roughness, the PASS of these metal surfaces is made to improve, so in following spray-applied primer and finish paint, lacquer painting will flat smooth, ensure that the presentation quality of product, improve product specification.

Described spray-applied primer is consistent with prior art with the technological process of finish paint and drying and technological parameter.

To sum up content, the present invention adopts first to process and polishes afterwards, then the technological method for processing of the car structure of integral spray assembling, and advantage compared with prior art is：

(1) framework metal surface flat smooth can be made, reach the requirement of surface roughness, make metal surface have certain roughness simultaneously again, improve PASS, make lacquer painting flat smooth it is ensured that the presentation quality of product, improve product specification.

(2) glossing is utilized to remove greasy dirt, oxide skin and the dirt of framework metal surface, effectively prevent in traditional handicraft, corrosiveness to the priming paint being sprayed on framework surface while going to degrease using alkaline solution, shorten the activity duration of workman, also will not be to environment.

(3) eliminate the operation of artificial touch-up paint in traditional handicraft, reduce labor strength, reduce production cost, also ensure that the presentation quality of product simultaneously.

(4) first spray the technological process assembling again due to employing, improve the degree of modularity of parts, be conducive to the later stage of car structure to assemble.

(5) technological process is more reliable, improves production efficiency.

Specific embodiment

With reference to embodiment, the present invention is described in further detail：

1) adjusting is carried out to the metal blank of car structure, and assembled and weld.

2) first time polishing, using the shot of a diameter of 1mm, ejection velocity is 100 meter per seconds, and the ball blast time is 5 minutes, removes the oxide skin of face of weld, is detected a flaw in welding position, carry out repair welding to the position of solder skip and rosin joint.

3) polish is carried out to the framework through organizing postwelding, be processed into the shape and size meeting design requirement.

4) need to carry out secondary group of weldering according to design, each parts are assembled on each base of framework, and and tube chamber welds with base.

5) second polishing, only in body frame such as：In registration arm, lateral surface, air spring face, gear box bracket plane and hole, journal box spring face, journal box spring face upper cover plate reference seat plane and the surface roughness requirements such as 105 size facades, vertical damper holder medial surface carry out Shot Blasting on the surface of more than 7um, carry out protective treatment on the surface of below 7um with protective cover to other surface roughness requirements.

During Shot Blasting, by the way of shot is mixed with steel wire section, steel wire section is 3 with the ratio of number of shot：1, a diameter of 1mm of steel wire section, the length of steel wire section is 1mm, a diameter of 2mm of shot, and ejection velocity is 100 meter per seconds, the ball blast time is 30 minutes, the different shot of this large amount of diameter and steel wire rapid lapse of time act on metal surface so that it may effectively remove the greasy dirt on framework surface, oxide skin, and dirt, make framework metal surface flat smooth, reach the requirement of roughness.

After such second polishing, the roughness of such as original framework metal surface is 50um, can reach 12.5um after polishing;Roughness as original framework metal surface is 12.5um, can reach 7um after polishing.

6) using compressed air, dust removal process is carried out to framework surface.

7) to framework surface spraying priming paint, it is dried process afterwards, spraying is consistent with prior art with the technological process being dried and technological parameter.

8) to framework surface spraying finish paint, it is dried process afterwards, spraying is consistent with prior art with the technological process being dried and technological parameter.

9) framework having been carried out spray treatment is assembled.

Claims

1. a kind of rolling stock framework technological method for processing it is characterised in that：This technique comprises the following steps：

6) dust removal process is carried out to framework surface；

7) to framework surface spraying priming paint, it is dried process afterwards；

9) framework having been carried out spray treatment is assembled；

Wherein, when carrying out described first time and second polishing, it is respectively adopted the shot of diameter l～2mm, ejection velocity is 80～100 meter per seconds, the ball blast time of first time Shot Blasting is less than or equal to 5 minutes, and the polishing time of second polishing is more than or equal to 20 minutes.

2. a kind of rolling stock framework technological method for processing according to claim l it is characterised in that：When carrying out described first time and second polishing, also respectively can be in the way of being mixed with steel wire section using shot, steel wire section is 3 with the ratio of number of shot：1, a diameter of 1mm of steel wire section, the length of steel wire section is l～2mm.

3. according to claim l or 2 a kind of rolling stock framework technological method for processing it is characterised in that：When carrying out described second polishing, the metal surface being greater than or equal to 7 u m to surface roughness requirements is processed by shot blasting.

4. according to claim l or 2 a kind of rolling stock framework technological method for processing it is characterised in that：Before carrying out described second polishing, the metal surface being less than 7 u m to surface roughness requirements carries out protective treatment.