CN103846319A - Method for manufacturing arc-shaped metal plate - Google Patents

Abstract

The invention relates to the technical field of machining, and discloses a method for manufacturing an arc-shaped metal plate. The method comprises the steps of marking a plurality of bending position lines on a metal plate; bending the metal plate in a bending angle in each bending position line. According to the method disclosed by the embodiment of the invention, one part of a polygon can be obtained by adopting the method for dividing the metal plate into a plurality of pieces and bending the metal plate, the part of the polygon is similar to the arc-shaped metal plate, and thus the arc shape is more accurate; in addition, the method disclosed by the embodiment of the invention has the advantage of lower cost as a dedicated punching device or an edge rolling device is not needed.

Description

Make the method for arc sheetmetal

Technical field

The present invention relates to field of machining, particularly a kind of method of making arc sheetmetal.

Background technology

Often need to make arc sheetmetal in field of machining, prior art is conventionally utilized process for stamping or is utilized special volume circle equipment to make arc sheetmetal.

For example, in the Chinese invention patent application that is 94105682.1 at application number, a kind of method of punching arc sheetmetal is disclosed, wherein this invention is the method that uses cloth pad punching arc sheetmetal, and technical scheme is: the thin and uniform cloth pad of varied in thickness in thick middle two ends is put into in the middle part between sheet-metal blank.While carrying out punching press, thin plate will produce excessive punching press.Like this, after the workpiece demoulding, just can obtain qualified curved thin plate through bounce-back again.

Again for example, in the Chinese utility model patent that is 201120008850.8 in the patent No., a kind of volume circle equipment of avoiding section bar wearing and tearing is disclosed, comprise the top roll elevating screw of base, two stands, two lower roll wheels of peace and upper roll wheel, the travelling gear that drives two lower roll wheels rotations and the lifting of drive upper roll wheel, on described base, be also provided with angle cutting mold, described upper roll wheel end is provided with the upper roll gear being in transmission connection with it, and this upper roll gear and described travelling gear are connected with a joggle.

At the manufacture field of some equipment, need the method for new making arc sheetmetal.

Summary of the invention

In view of this, the present invention proposes a kind of method of making arc sheetmetal, in order to obtain arc sheetmetal more accurately, and reduce costs.

According to an aspect of the present invention, provide a kind of method of making arc sheetmetal, having comprised:

On a metallic plate, mark a plurality of bending position lines;

At every position line place, described metallic plate is carried out to bending with a bending angle.

Preferably, the spacing of adjacent positioned line equals a polygonal length of side, this polygon be arc sheetmetal place circle in connect regular polygon or circumscribed regular polygon.

Alternatively, using arc sheetmetal inner surface place circle as described arc sheetmetal place circle; Or, using arc sheetmetal outer surface place circle as described arc sheetmetal place circle; Or, using place, arc sheetmetal intermediate layer circle as described arc sheetmetal place circle.

Alternatively, the method further comprises: calculate described bending angle.

According to a kind of embodiment, the step of calculating bending angle comprises:

According to the length of side that connects regular polygon in the radius of described arc sheetmetal place circle, described circle, calculate the limit number of this regular polygon, and further calculate the angle of adjacent two edges in described regular polygon, as described bending angle.

Follow according to a kind of embodiment, utilize a bender to carry out bending.

Alternatively, use a nose radius to be greater than fixing a cutting tool of plate thickness twice.

From such scheme, can find out, the method that metallic plate is divided into plural piece bending due to embodiments of the invention employing obtains a polygonal part, and be approximately arc sheetmetal, so with respect to 94105682.1 patents, there is arc more accurately.The method of the embodiment of the present invention, does not need special pressing equipment or volume circle equipment, so with respect to 201120008850.8 utility models, also have lower-cost advantage.

Brief description of the drawings

To, by describing the preferred embodiments of the present invention in detail with reference to accompanying drawing, the person of ordinary skill in the art is more clear that above-mentioned and other feature and advantage of the present invention below, in accompanying drawing:

Fig. 1 is according to the schematic diagram of a workpiece of the embodiment of the present invention.

Fig. 2 is the partial schematic diagram that adopts regular polygon simulation arc sheetmetal place circle.

Fig. 3 is the schematic diagram that in the embodiment of the present invention, metallic plate is carried out mark.

Fig. 4 is the schematic diagram of bending in the embodiment of the present invention.

Wherein, Reference numeral is as follows:

The other parts 201 metal plate middle layer place circles of 101 arc sheetmetal 102-105 workpiece

202 regular polygon 301 bending position line R radiuses

The angle on the adjacent both sides of θ central angle a length of side β; Bending angle

D thickness 401 402 metallic plates of fixing a cutting tool

403 bottom tools

Detailed description of the invention

For making the object, technical solutions and advantages of the present invention clearer, the present invention is described in more detail by the following examples.

Fig. 1 is the schematic diagram of related workpiece in this specific embodiment.As shown in Figure 1, this workpiece comprises one section of arc sheetmetal 101 and other parts 102,103,104,105 that can adopt the processing of the present embodiment method.The radius R of these arc sheetmetal 101 inner surface place circles is 861.5mm, and radian (central angle) θ of this arc sheetmetal 101 is 43.5 °.The thickness d of arc sheetmetal 101 is 2mm.Because the emphasis of the present embodiment does not lie in the other parts 101-105 that makes workpiece, therefore the present embodiment is not done more detailed introduction to these parts 102-105.

In the method for the making arc sheetmetal of the present embodiment, simulate the circle at arc sheetmetal 101 places with a regular polygon, and by a part for this regular polygon of processing, thereby be met the arc sheetmetal of technique franchise.This regular polygon can connect regular polygon in described circle, or the circumscribed regular polygon of described circle.Taking the interior regular polygon that connects as example is described, still it will be appreciated by those skilled in the art that circumscribed regular polygon can be suitable for equally in the present embodiment.

Because metallic plate has certain thickness, the present embodiment is using place, the intermediate layer circle of arc sheetmetal as this arc sheetmetal place circle recited above.In the case of the Thickness Ratio of metallic plate is thinner, circle that can be using the circle at the inner surface place circle of arc sheetmetal or arc sheetmetal outer surface place as this arc sheetmetal place.

Comprise the following steps according to the method for the making arc sheetmetal of the present embodiment:

Step S11, determines the length of side of regular polygon.

Fig. 2 is the partial view that adopts regular polygon approximate simulation arc sheetmetal place circle.In arc sheetmetal 101 place, intermediate layer circles 201, connect regular polygon 202 as the simulation to this circle.According to the parameter such as radius equidimension and bending machine die specification of the thickness of arc sheetmetal, arc sheetmetal place circle 201, in this specific embodiment, described regular polygon 202 length of side a sizes are set as to 8mm.

Step S12, the angle of adjacent two edges in calculating regular polygon 202.

According to the character of regular polygon, the limit number that can calculate regular polygon 202 by above-mentioned parameter is:

N＝(R+1/2*d)*2*π/a

Wherein, the limit number that N is regular polygon, R is the radius of arc sheetmetal 101 inner surface place circles, d is the thickness of arc sheetmetal, (R+1/2*d) be the radius of arc sheetmetal 101 place, intermediate layer circles 201, π is pi, and a is the length of side of regular polygon 202.As calculated, N=677.

Further draw the folded acute angle of regular polygon 202 adjacent two edges:

β＝360°/N

Wherein β is the angle of regular polygon 201 adjacent two edges, the limit number that N is regular polygon.β is about 0.5 ° as calculated.

Step S13 marks a plurality of position lines 301 (mark) on metallic plate to be processed, and the spacing of these position lines is the length of side a of regular polygon 202.

Fig. 3 is the schematic diagram that in the present embodiment, metallic plate is carried out mark.In order to make bending more accurate, be necessary to draw a plurality of bending position lines 301 on metallic plate.In the present embodiment, position line 301 is processed with beating calibration method in the time of laser cutting, position line 301 intervals equal above-mentioned length of side a, according to the length of side of the length of metallic plate and regular polygon or according to the angle of the central angle of arc sheetmetal and regular polygon adjacent two edges, can know and need Hua80 road position line, wherein deduct the length shared due to arc sheetmetal 201 and other parts 102,104 junction bent angles.

Step S14, at every position line place, using the angle that obtains in step S12 as bending angle, carries out bending to metallic plate.

In this step, on above-mentioned bending position line 301, carry out bending taking above-mentioned angle beta as bending angle.In the present embodiment, adopt bender to carry out bending, bender fix a cutting tool parameter specification select R5 specification (nose radius is 5mm).The present embodiment preferably adopts larger the fixing a cutting tool of nose radius, and for example nose radius is greater than fixing a cutting tool of plate thickness twice, and bending part can not exist obvious folding line like this, can simulate better arc.Fig. 4 has provided the schematic diagram of bending, and wherein, metallic plate 402 is fixed on bender bottom tool 403, then depresses and fixes a cutting tool 401, forms the bending angle β setting.

By above-mentioned bending step, can be met the arc sheetmetal of processing request.Like this, compared with the process for stamping of 94105682.1 Patent Application Publications, the present embodiment can be controlled the shape of arc better, and obtains arc more accurately.Compared with 201120008850.8 utility models, the present embodiment does not need special volume circle equipment, can reduce the cost of making arc sheetmetal.

Step S15, further, can spray paint to the metallic plate after bending.Due to the covering of paint, can eliminate obvious folding line, make arc sheetmetal basic consistent with designing requirement.

The application relates to Machining Technology field, discloses a kind of method of making arc sheetmetal, comprising: on a metallic plate, mark a plurality of bending position lines; At every position line place, described metallic plate is carried out to bending with a bending angle.The method that metallic plate is divided into plural piece bending due to embodiments of the invention employing obtains a polygonal part, and is approximately arc sheetmetal, so have arc more accurately.And the method for the embodiment of the present invention does not need special pressing equipment or volume circle equipment, also has lower-cost advantage.

The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (7)

1. a method of making arc sheetmetal, comprising:

On a metallic plate, mark a plurality of bending position lines;

At every position line place, described metallic plate is carried out to bending with a bending angle.

2. method according to claim 1, is characterized in that, the spacing of adjacent positioned line equals a polygonal length of side, this polygon be arc sheetmetal place circle in connect regular polygon or circumscribed regular polygon.

3. method according to claim 2, is characterized in that, using arc sheetmetal inner surface place circle as described arc sheetmetal place circle;

Or, using arc sheetmetal outer surface place circle as described arc sheetmetal place circle;

Or, using place, arc sheetmetal intermediate layer circle as described arc sheetmetal place circle.

4. method according to claim 1, is characterized in that, the method further comprises: calculate described bending angle.

5. method according to claim 4, is characterized in that, the step of calculating bending angle comprises:

According to the length of side that connects regular polygon in the radius of described arc sheetmetal place circle, described circle, calculate the limit number of this regular polygon, and further calculate the angle of adjacent two edges in described regular polygon, as described bending angle.

6. method according to claim 1, is characterized in that, utilizes a bender to carry out bending.

7. method according to claim 6, is characterized in that, uses a nose radius to be greater than fixing a cutting tool of plate thickness twice.

Images