CN103143892B - Forming method for vehicle head covering - Google Patents

Abstract

The invention discloses a forming method for a vehicle head covering. The method comprises the steps as follows: step one, analyzing a drawing; step two, detecting a wood pattern; step three, preforming; step four, performing damper forming; and step five, cutting edges and shaping. The forming method solves the problems that the labor intensity is high, the efficiency is low, and the rejection rate of the covering is high due to non-uniform steps for processing the vehicle head covering and unreasonable processing sequence.

Description

Headstock covering forming method

Technical field

The present invention relates to headstock front end covering forming method.

Background technology

Shake hammer forming technique plays great function in speed car, the manufacture of urban rail car carbody, and shake hammer forming technique is irreplaceable in enterprise produces simultaneously.Forming technique means chipless, accurately with minimum noise, chipless cold forming is carried out to sheet metal and section bar, comprise compression, extend, be pressed into arch, pressing, flattening-out, again shaping, the draw, bend pipe etc., same equipment can carry out shape bending, plate forming is processed, and also may be used for keeping in repair and final accurate correction work.

Covering forming employing is shaken type, manual type method of repairing hammer out and is processed, and due to procedure of processing disunity, the unreasonable labour intensity that causes of processing sequence is large, and efficiency is low, and covering percent defective is high.The surface quality requirements of covering is very high, because the unordered surface quality of covering that makes of selecting of the instrument corrected cannot ensure.As: as hardwood hammer, aluminium hammer, roller and platform etc.Headstock covering forming part can not follow processing method, and covering forming is three-dimensionally shaped, and difficulty of processing is large, and can not use for reference method of operating, machine-shaping process time is long, and Forming Quality is difficult to ensure card.

Summary of the invention

The object of this invention is to provide a kind of headstock covering forming method, make procedure of processing more reasonable, tools selection specification, improves working (machining) efficiency, product quality, rate of reducing the number of rejects and seconds, and reduces operator's labour intensity.

For achieving the above object, the invention provides a kind of headstock covering forming method, comprise the first step: analyze drawing, determine processing scheme by analytic product figure, select mould according to vehicle material skin morph degree, characterized by further comprising:

Second step: detect wooden model

Carry out selected wooden model according to drawing, each size of Measurement accuracy wooden model, carry out segmentation according to wooden model simultaneously, determine to process coefficient;

3rd step: give shaping

Adopt lock press to give first shaping, according to different wooden model shapes, select different feeding style, adjustment device travel, according to the size of radius of the radian, takes different coefficients, can increase work efficiency like this, ensures covering quality simultaneously;

4th step: shake type hammer out

To give shaping covering to have gone further on shake hammer machine, adjust operating pressure according to material, distortion size, covering produces distortion gradually through stressed, constantly measure with model simultaneously, be easy to judge covering defect, repeatedly impact with shake hammer, manual rectification is auxiliary, and covering profile is determined;

5th step: cut edge repaiies type

Covering, through shaking hammer out after type, detects with wooden model, accurately rules according to wooden model, prescind allowance, again contrast wooden model and carry out secondary reparation, adopt the post forming of shake hammer and by hand repair type and combine, covering is accurately repaired, makes covering meet wooden model completely, accurately reach drawing technical requirement.

The present invention fundamentally solves Problems existing on forming method, to employee improving the quality of products, play directive function in production efficiency.

Detailed description of the invention

The first step: analyze drawing

Determine processing scheme by analytic product figure, first grasped the three-dimensional shape of workpiece by the three-view diagram of drawing; See left view, right view, top view, sectional view, fragmentary detail view understands contour structure, graph of a correspondence position; Next sees size marking in figure, and the tolerance grade requirement of processing, comprises roughness, sheet metal thickness, Material texture and technical requirement; Covering has carbon steel, stainless steel, aluminium alloy structure, and according to vehicle material, skin morph complexity selects suitable shake to hammer mould into shape;

Second step: detect wooden model

Selected wooden model is carried out according to 3 D stereo drawing, usual headstock covering is spliced by some wooden models, the suitable three-dimensional template of wooden model, wooden model must meet product figure and technological requirement, its dimensional discrepancy, deviation of centre distance, plane deviation, process accessories deviation, fillet deviation, allowance deviation, highly, gradient.Simultaneously according to wooden model, science segmentation is carried out to processed complex position, simple be difficult to moulding section separate machined, covering adds man-hour, and it compresses to the inside, is reduced gradually outward by interior, and outside produces and stretches, and by reducing gradually inward, determines processing coefficient outward;

3rd step: preformed

Slab processing covering is very difficult, shaping also bad, and operating efficiency is extremely low, adopt lock press or levelling machine to do shaping in advance, according to different wooden model shapes, select different feeding style, adjustment device travel, according to the size of radius of the radian R, take different coefficients, more than R400 selects smoothing preformed, below R300 selects the preformed of lock press, adopt different feeding style according to wooden model arc, gradient, can increase work efficiency like this, ensure covering quality simultaneously;

4th step: shake type hammer out

FWA602 compression mold selected by shake hammer mould, shaping covering will be given on shake hammer machine, go to complete further, according to material, distortion size adjusts operating pressure 64N, gradually reduced inwards by cover edges, edge operating pressure increases gradually, operating pressure is by reducing greatly inwards, covering produces distortion gradually through stressed, skin-surface distortion shake hammer impacts gently, operating pressure is 60N, distortion position is gradually to border movement, constantly measure with wooden model simultaneously, be easy to judge covering defect, repeatedly impact with shake hammer, manual rectification is auxiliary, covering profile is determined,

5th step: cut edge repaiies type

Covering is through shaking hammer out after type, carefully detect with wooden model, accurately rule according to wooden model, prescind allowance, covering cut edge back edge produces thermal deformation, again contrast wooden model and carry out secondary reparation, adopt the post forming of shake hammer to repair type combine with manual, cover edges shake hammer compression mould impacts, cover edges dodges the less employing repaired by hand of seam, skin-surface is accurately repaired, makes covering meet wooden model completely, accurately reach drawing technical requirement.

Claims (1)

1. a headstock covering forming method, comprises the first step: analyze drawing, determine processing scheme by analytic product figure, selects mould, characterized by further comprising according to vehicle material skin morph degree:

Second step: detect wooden model

Carry out selected wooden model according to drawing, each size of Measurement accuracy wooden model, carry out segmentation according to wooden model simultaneously, determine to process coefficient;

3rd step: preformed

Adopt lock press to do shaping in advance, according to different wooden model shapes, select different feeding style, adjustment device travel, according to the size of radius of the radian, takes different coefficients;

4th step: shake type hammer out

Gone further on shake hammer machine by preformed covering, adjust operating pressure according to material, distortion size, covering produces distortion gradually through stressed, constantly measure with model simultaneously, be easy to judge covering defect, repeatedly impact with shake hammer, manual rectification is auxiliary, and covering profile is determined;

5th step: cut edge repaiies type

Covering, through shaking hammer out after type, detects with wooden model, accurately rules according to wooden model, prescind allowance, again contrast wooden model and carry out secondary reparation, adopt the post forming of shake hammer and by hand repair type and combine, covering is accurately repaired, makes covering meet wooden model completely, accurately reach drawing technical requirement.