CN202861162U - Car roof connection beam forming mould - Google Patents

Abstract

The utility model discloses a car roof connection beam forming mould which is characterized by comprising a forming tyre mould and guide plates. The guide plates are arranged on the left side and the right side of the forming tyre mould. Stretch bending mould forming is adopted, and the car roof connection beam forming mould does not need to conduct cavity filling and splitting after forming, a working procedure is reduced, efficiency is greatly improved, and cost is greatly reduced. In the process of forming, the car roof connection beam forming mould has big tensile stress, and directly acts on a workpiece forming portion, so that the car roof connection beam forming mould solves the problems that a workpiece is big in springback, residual stress deforms, the workpiece is hollow and twisted, and the like, and quality is greatly improved.

Description

Roof tie-beam mould

Technical field

The utility model relates to a kind of EMU roof tie-beam mould.

Background technology

The external roof tie-beam forming method of introducing is: adopt the aluminium section bar of remaining silent, use the special plane brake forming, afterwards the section bar after the brake forming is cut open, be processed into the open type section bar, meet the requirements of part shape and size.Concrete operation is: aluminium section bar cavity filling-special plane brake forming-taking-up filling-Ageing Treatment-dissect-machined.

The roof tie-beam forming method of domestic employing is: adopt the aluminium section bar of remaining silent, use the mould die mould, afterwards the section bar behind the die mould is cut open, be processed into the open type section bar, meet the requirements of part shape and size.Concrete operation is: aluminium section bar cavity filling-mould die mould-taking-up filling-adjusting-dissect-adjusting-Ageing Treatment-adjusting-machined.

There is following shortcoming in above-mentioned technique:

1. workpiece is the open type section bar, but adopts the method that is processed into the open type section bar behind the enclosed product moulding, and waste of material is large, and utilization rate is low, and machining amount is large.

2. technology and device is complicated, and operation is long, and cost is high, and efficient is low.

3. after the workpiece behind the employing enclosed product moulding is cut open, because residual stress distortion, the key technology item point masses such as product shape, size, flatness, perpendicularity, section shrinkage all are difficult to guarantee, must with manually carrying out a large amount of adjustings, can't satisfy the production in enormous quantities needs.

The utility model content

The purpose of this utility model provides the new mould of a kind of roof tie-beam, and the product Forming Quality is poor, production efficiency is low, stock utilization is low to overcome, the high in cost of production defective, improves product quality and production efficiency, and satisfies the high speed motor car production requirement.

For achieving the above object, the utility model provides a kind of roof tie-beam mould, it is characterized in that: comprise molding fetal, guide plate, be provided with guide plate about molding fetal.

Die circular radius is 0.98 ~ 0.987 with the ratio of Workpiece's Arc Radius, the monolateral gap 0 ~ 1mm of workpiece and mould.

The utility model adopts the stretch bending mold moulding, need not carry out cutting open after cavity filling and the moulding again, has reduced operation, and efficient significantly improves, and cost significantly reduces.Larger tension is arranged in the forming process, and mould directly acts on the Workpiece shaping position, therefore overcome the workpiece resilience large, the residual stress distortion, the difficult problems such as workpiece depression, distortion, quality greatly improves.

Description of drawings

Accompanying drawing 1 is the utility model bending forming schematic diagram;

Accompanying drawing 2 is the profiles along A-A line in the accompanying drawing 1;

Accompanying drawing 3 is the workpiece figure behind the bending forming.

The specific embodiment

With reference to accompanying drawing 1, accompanying drawing 2, the mould that the utility model adopts comprises molding fetal 4, guide plate 2, and guide plate is located at the two sides, front and back of molding fetal, and the stretch bending chuck 3 that is installed on the stretch benders clamps the two ends of workpiece 1.The guide plate Main Function is in the stretch bending process workpiece to be led, and prevents that workpiece from producing torsional deformation; The molding fetal Main Function is power transmission and makes workpiece along the outline line moulding of mold; The stretch bending mold design should be considered the workpiece resilience, provides the springback compensation amount at the mold wheel profile, and die circular radius is 0.98 ~ 0.987 with the ratio of Workpiece's Arc Radius; The monolateral gap 0 ~ 1mm of workpiece and mould.

Moulding technique:

(1) calculates workpiece bending forming power, determine the pulling force that stretch benders adopt;

(2) stretch bending process: during work, profile workblank is put on the mould locates first, and clamp in the stretch benders chuck, start afterwards stretch benders, workpiece is under the stretch benders effect, along the mold profile moulding.After the moulding stretch benders chuck is unclamped, take off workpiece, finish the bending forming of workpiece.

Claims (2)

1. a roof tie-beam mould is characterized in that: comprise molding fetal, guide plate, be provided with guide plate about molding fetal.

2. roof tie-beam mould according to claim 1, it is characterized in that: die circular radius is 0.98 ~ 0.987 with the ratio of Workpiece's Arc Radius, the monolateral gap 0 ~ 1mm of workpiece and mould.

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