CN107537748A

CN107537748A - A kind of processing technology of car structure

Info

Publication number: CN107537748A
Application number: CN201610487213.0A
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-06-29
Filing date: 2016-06-29
Publication date: 2018-01-05

Abstract

The present invention relates to a kind of technological method for processing vehicle timber support, adjusting group weldering is carried out to the metal blank of car structure, then first time Shot Blasting is carried out, welding position is detected a flaw, framework is finished again, carrying out secondary group of weldering according to the design needs, parts group is welded on each base of framework, then second of Shot Blasting is carried out again, remove greasy dirt, oxide skin and the dirt on each framework surface, to each framework surface spraying priming paint and finish paint after dust removal process, finally each framework for having carried out spray treatment is assembled.The present invention is using ball blast after first processing, the processing technology of integral spray assembling again, framework metal surface flat smooth can be made, reach the requirement of surface roughness, while make metal surface that there is certain roughness again, improve PASS, make lacquer painting flat smooth, ensure that the presentation quality of product, while also reduce labor strength and production cost, technological process is rationally reliable, improves production efficiency.

Description

A kind of processing technology of car structure

Technical field

The present invention relates to a kind of processing technology of car structure, belongs to machining technology field.

Background technology

At present in the actual production process of rolling stock framework, the processing technology generally used is：To car structure Adjusting group postwelding is carried out, carries out Shot Blasting, spray-applied primer, then component is finished, removes the greasy dirt of component surface, it is right The priming paint destroyed in process carries out touch-up paint, then each component processed is assembled, finally to component integral spray finish paint Processing technology.Deficiency using this processing technology is, oil removing is gone in the component surface to spray-applied primer When dirty, alkaline solution or solvent or diluent typically are used, is also had necessarily to the priming paint for being sprayed on component surface while degreasing Corrosiveness, so when to component spray paint, not only the surface quality of finish paint is low, and the adhesive force of finish paint also has in addition Declined, and the activity duration is grown, and cause certain environmental pollution；Finish, add again after to component spray-applied primer The destruction of part priming paint can be caused during work, it is necessary to carry out artificial touch-up paint, additionally, due to the relatively light of the metal surface after processing Sliding, the adhesive force of paint can also reduce, so not only add production cost, increase the labor intensity of worker, while also shadow The presentation quality of whole car structure is rung.It is therefore expected that there is one kind to improve product appearance quality, production effect is improved Rate, labor strength is reduced, the technological method for processing vehicle timber support for reducing production cost substitutes the above method.

The content of the invention

In order to solve the above problems and deficiency, the present invention propose an a kind of framework processing technology, can improve production Product presentation quality, production efficiency is improved, reduce labor strength, reduce production cost.

To achieve the above object, described technological method for processing vehicle timber support comprises the following steps：

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

2) first time Shot Blasting, scale removal, welding position is detected a flaw, repair welding；

3) framework through group postwelding is finished, is processed into the shape and size for meeting design requirement；

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

5) second of Shot Blasting, greasy dirt, the oxide skin on framework surface, and dirt are removed；

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

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

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

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

So framework metal surface can effectively remove the oxide skin of face of weld after Shot Blasting of the mat woven of fine bamboo strips, full The flaw detection requirement of sufficient face of weld, finds out solder skip, rosin joint, carries out repair welding in time.Second of ball blast is being passed through in framework metal surface After processing, surfacing is smooth, and effect is more preferable, and the roughness of framework metal surface can be reduced further, reach rough surface The requirement of degree.

When carrying out second of Shot Blasting, surface of the surface roughness requirements greater than or equal to 7um is carried out at ball blast Reason, 7um surface is less than for surface roughness requirements, before second of Shot Blasting is carried out, these surfaces are protected Cover carries out protective treatment.

By second of Shot Blasting process, because the ball blast time is longer, greasy dirt, the oxidation on framework surface are effectively eliminated Skin and dirt, not only make the metal surface flat smooth of framework, reach the requirement of Metal Surface Roughness, framework table can also be made Face has certain roughness, improves the PASS of these metal surfaces, so in following spray-applied primer and finish paint When, lacquer painting will flat smooth, ensure that the presentation quality of product, improve product specification.

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

To sum up content, the present invention is using ball blast after first processing, then the processing technology side of the car structure of integral spray assembling Method, compared with prior art the advantages of be：

(1) framework metal surface flat smooth can be made, reach the requirement of surface roughness, while again there is metal surface Certain roughness, improves PASS, makes lacquer painting flat smooth, ensure that the presentation quality of product, improves product Class.

(2) greasy dirt, oxide skin and the dirt of framework metal surface are removed using ball blast technique, effectively prevent traditional work In skill, to the corrosiveness for the priming paint for being sprayed on framework surface while being degreased using alkaline solution, work is shortened The activity duration of people, environment will not also be polluted.

(3) process for eliminating artificial touch-up paint in traditional handicraft, reduces labor strength, reduces production cost, Also the presentation quality of product is ensure that simultaneously.

(4) as a result of the technological process that assembles again is first sprayed, the degree of modularity of parts is improved, is advantageous to The later stage assembling of car structure.

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

Embodiment

The present invention is described in further detail with reference to embodiment：

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

2) first time Shot Blasting, using a diameter of Imm shot, ejection velocity is 100 meter per seconds, and the ball blast time is 5 points Clock, the oxide skin of face of weld is removed, welding position is detected a flaw, repair welding is carried out to the position of solder skip and rosin joint.

3) framework through group postwelding is finished, is processed into the shape and size for meeting design requirement.

4) secondary group of weldering is carried out according to the design needs, each parts are assembled on each base of framework, and is welded with base Connect.

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

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

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

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

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

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

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

Claims

A kind of 1. technological method for processing vehicle timber support, it is characterised in that：The technique comprises the following steps：

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

2) first time Shot Blasting, scale removal, welding position is detected a flaw, repair welding；

3) framework through group postwelding is finished, is processed into the shape and size for meeting design requirement；

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

5) second of Shot Blasting, greasy dirt, the oxide skin on framework surface, and dirt are removed；

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

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

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

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

Wherein, when carrying out the first time and second of Shot Blasting, diameter l~2mm shot, ejection velocity is respectively adopted For 80~100 meter per seconds, the ball blast time of first time Shot Blasting is less than or equal to 5 minutes, during the ball blast of second of Shot Blasting Between be more than or equal to 20 minutes.
A kind of 2. technological method for processing vehicle timber support according to claim 1, it is characterised in that：Carrying out the first time During with second of Shot Blasting, also respectively can by the way of shot mixes with steel wire section, the quantity of steel wire section and shot it Than for 3：1, a diameter of 1mm of steel wire section, the length of steel wire section is l~2mm.
3. according to a kind of technological method for processing vehicle timber support of claim 1 or 2, it is characterised in that：Carrying out described second During Shot Blasting, Shot Blasting is carried out to metal surface of the surface roughness requirements greater than or equal to 7 u m.
4. according to a kind of technological method for processing vehicle timber support of claim 1 or 2, it is characterised in that：Carrying out described second Before Shot Blasting, protective treatment is carried out to metal surface of the surface roughness requirements less than 7 u m.