CN101526810B - Computer-assisted forming method of steel arch with wave webs - Google Patents

Abstract

The invention relates to a computer-aided forming method for a corrugated web steel arch, and belongs to the technical field of corrugated web steel arch processing. It is characterized in that under the control of the computer, the processing of the arched waved web can be completed through five stages of blanking, cold bending, rolling of the uniform web, rolling of the arched waved web and welding. In the rolling process of uniform web and arch wave web, the wave height of uniform wave web and the lower wave height of arch wave web are respectively controlled variables. The invention has the advantages that the arch forming of the web is very simple, and the blanking process greatly saves steel materials, and the component processing can be efficiently and accurately completed through the application of the computer aided technology.

Description

A kind of area of computer aided forming method of wave web steel arch

Technical field

The present invention relates to a kind of area of computer aided forming method of wave web steel arch, belong to wave web steel arch processing technique field.

Technical background

Steel arch structure is because advantageous characteristic such as bearing capacity height are widely used in building structure and bridge structure, and the making of its arcual component has two kinds of methods at present, i.e. (1) clod wash or simmering and bending moulding; (2) make according to the design size blanking fully.For the less round steel pipe member of radius-thickness ratio, it is feasible that its clod wash overarches, but for big radius-thickness ratio steel pipe, then is easy to cripling during clod wash, and its method for making is inadvisable.For the member of other section form, as have the cross section (as box section, square-section and I-section etc.) of web,, or seriously damage material capability if adopt the method for clod wash or simmering and bending, or the serious bending deformation of moulding trailing web.This is that this can not realize on steel structure processing technology fully because with the member clod wash or when simmering camber, will produce very big pressure up and down at the web plate section neutral axis and make its generation plastic yield.At present, for section form that can not moulding according to first method, often adopt according to the arc-shaped webs size of design and carry out blanking, this method will bring bigger leftover pieces not utilize, and cause very big waste.In view of above reason, the present invention proposes a kind of new manufacture craft, and particularly a kind of new area of computer aided forming method makes the various cross sections that have web be easy to be shaped to arcual component, and machining precision is very high, is called the area of computer aided forming method of wave web steel arch.

Summary of the invention

The present invention is directed to a kind of new method that a series of arcual components that have web propose, particularly a kind of new area of computer aided forming method, the web of the arcual component after the moulding is a wave, and the camber arch moulding of web is very easy, and the blanking process is greatly saved steel.By the application of CAP, can efficiently accurately finish the processing of member.According to the wave web steel arch that this forming method forms, the outer rigidity of the face of its web with straighten rigidity and be greatly improved, the transportation installation process is safety firmly.

A kind of area of computer aided forming method of the wave web steel arch that the present invention proposes, it is characterized in that described method is to realize according to the following steps in a wave web steel arch area of computer aided formation system of being made of computing machine, blanking machine, uniform wave web roller mill, wave web roller mill heterogeneous and bonding machine:

Step (1): in described computing machine, set following five control modules, wherein:

First control module is a cutting module, controls the blanking of flat web and upper and lower edge of a wing flat board, imports following design parameter:

1) the wave number n that comprises of the wave web of steel arch is setting value;

2) the wavelength l of each wave of the wave web of steel arch, the wave web axis in the steel arch is setting value;

3) the wave web design arc length L of steel arch is in the wave web axis of steel arch, L=nl;

4) the wave web height h of steel arch ₀, be setting value;

5) the wave web design radius of curvature R of steel arch, the wave web axis in the steel arch is setting value;

6) the wave web cutting length s of steel arch,

Wherein y represents along the wave web side surface direction of steel arch, and x represents that f is the wave amplitude height of uniform wave web, is setting value along the wave web length direction of steel arch;

7) the wave web of steel arch is near the wave amplitude height f of top flange one lateral edges _tUltimate value α with the ratio of uniform wave web wave amplitude height f is setting value;

8) the minimum wave amplitude height of the wave of wave web is f uniformly _MinSo the wave amplitude height f of the wave of wave web need satisfy f＞f uniformly _Min, f _MinCan determine by following formula:

${\∫}_0^{l_{\min }}\sqrt{1+{\left[\frac{d\left(f_{\min }\sin (2\mathrm{\πx}/l_{\min })\right)}{\mathrm{dx}}\right]}^2}\mathrm{dx}=s/n$

$l_{\min }=l_{t\max }\frac{R}{R+h_0/2}$

${\∫}_0^{l_{t\max }}\sqrt{1+{\left[\frac{d\left(f_{t\min }\sin (2\mathrm{\πx}/l_{t\min })\right)}{\mathrm{dx}}\right]}^2}\mathrm{dx}=s/n$

f _t?min＝αf

In the formula, l _MinBe the uniform minimum wavelength of the wave of wave web, l _TmaxBe the wave web of steel arch maximal value, f near top flange one lateral edges wavelength _TminMinimum value for the last wave amplitude height of the wave web of steel arch;

9) the top flange plate length L of described steel arch _Ft,

10) the bottom wing listrium length L of described steel arch _Fd,

11) the width b of the upper and lower flange plate of described steel arch is setting value;

Second control module is flange plate cold roll forming module, controls the upper and lower flange plate that the dull and stereotyped clod wash in the upper and lower edge of a wing becomes described steel arch;

The 3rd control module for uniform wave web rolling module, is controlled flat web and is rolled into uniform wave web;

The 4th control module is wave web rolling module heterogeneous up and down, controls uniform wave web and is rolled into wave web heterogeneous up and down, imports following parameter:

Described up and down wave web heterogeneous is at the wavelength ld near the intensification indented region edge of lower flange one side,

$l_d=\frac{R-h_0/2}{R}l;$

Described wave web heterogeneous up and down is at the wave amplitude design height f that deepens the indented region edge near lower flange one side _d, calculate according to the following equation:

${\∫}_0^{l_d}\sqrt{1+{\left[\frac{d\left(f_d\sin (2\mathrm{\πx}/l_d)\right)}{\mathrm{dx}}\right]}^2}\mathrm{dx}=s/n$

The 5th control module is welding module, in order to weld the upper and lower flange plate of described wave web heterogeneous up and down and described steel arch;

Step (2): first control module is a cutting module, controls the blanking of flat web and upper and lower edge of a wing flat board, and its step is as follows:

Step (2.1): described computing machine is imported three groups of data to blanking machine, is respectively: s and h ₀L _FtAnd b; L _FdAnd b;

Step (2.2): blanking machine is according to three groups of data, and blanking forms three blocks of laths: with s and h ₀As the length and the width of blanking, export to blanking machine, can obtain a rectangular flat web; With L _FtWith length and the width of b, can obtain the top flange flat board as blanking; With L _FdWith length and the width of b, can obtain the lower flange flat board as blanking;

Step (3): second control module is controlled the dull and stereotyped clod wash in the described upper and lower edge of a wing plate that overarches, and its step is as follows:

Step (3.1): described computing machine is transferred following parameter and is conveyed into forming mill: the wave web design radius of curvature R of steel arch, and in the wave web axis of steel arch, the wave web height h of steel arch ₀

Step (3.2): described forming mill is according to input parameter, and it is R+h that the top flange plate bending of described steel arch is become radius-of-curvature ₀/ 2 arch sheet, it is R-h that the lower flange plate bending of described steel arch is become radius-of-curvature ₀/ 2 arch sheet forms the upper and lower flange plate that described steel encircles;

Step (4): the 3rd control module is controlled the rolling uniform wave web of described uniform wave web roller mill, and its step is as follows:

Step (4.1): described computing machine is transferred following parameter and is conveyed into described uniform wave web roller mill: the wave number n that the wave web of steel arch comprises, the wave amplitude height f of wave web uniformly;

Step (4.2): flat web carries out rolling by described uniform wave web roller mill, according to input parameter, serves as the control parameter with the wave amplitude height, and one time rolling forms uniform wave web, and it comprises n wave, and the wave amplitude height of each wave is f;

Step (5): the 4th control module is controlled wave web roller mill heterogeneous described uniform wave web is rolled into wave web heterogeneous up and down, and its concrete steps are as follows:

Step (5.1): described computing machine is transferred following parameter and is sent to described wave web roller mill heterogeneous up and down: the wave number n that the wave web of steel arch comprises, the wave web of steel arch is near the wave amplitude design height f of lower flange one side _d

Step (5.2): uniform wave web is passed through described wave web roller mill heterogeneous up and down, with the wave amplitude height near the edge of lower flange one side is the control parameter, deepen wave impression, make the wave amplitude height at the edge of close lower flange one side reach f near lower flange one side _d, and be stretched automatically near the wave impression of top flange one side, just form wave web heterogeneous up and down;

Step (6): described wave web heterogeneous up and down of the 5th control module control and described upper and lower flange plate welding form described wave web steel arch, and its step is as follows:

Step (6.1): aim at described upper and lower flange plate and described wave web heterogeneous up and down according to moulding position shape;

Step (6.2): automatic welding machine carries out single pass along described upper and lower flange plate and described wave web heterogeneous contact site up and down, determines path of welding;

Step (6.3): the path of welding that automatic welding machine is determined in the step (6.2) welds, and can connect described upper and lower flange plate and described wave web heterogeneous up and down, finally forms wave web steel arch.

The present invention proposes a kind of area of computer aided forming method of wave web steel arch, and this method makes the camber arch moulding of web become easy, and the blanking process greatly saves steel, by the application of CAP, can efficiently accurately finish member processing.

Description of drawings

Fig. 1 is a upper and lower flange plate cold roll forming synoptic diagram of the present invention.

Fig. 2 is a uniform wave web synoptic diagram of the present invention.

Fig. 3 is uniform wave web fragmentary detail view of the present invention, the i.e. enlarged drawing of a-quadrant among Fig. 1.

Fig. 4 is a wave web synoptic diagram heterogeneous up and down of the present invention.

Fig. 5 is wave web fragmentary detail view heterogeneous, the i.e. enlarged drawing in B zone among Fig. 3 up and down of the present invention.

Fig. 6 is a wave web steel arch completed state synoptic diagram of the present invention.

Fig. 7 is the process flow diagram of wave web steel arch area of computer aided forming method of the present invention.

Embodiment

A kind of area of computer aided forming method of the wave web steel arch that the present invention proposes, its computer aided control system divides five control modules, respectively five steps of corresponding wave web molding.At first first control module be obtain according to specific size blanking in the cutting module flat web and on, the lower flange flat board, in second control module, will go up again, the dull and stereotyped clod wash in lower flange become the steel arch on, the bottom wing listrium, in the 3rd control module, flat web rolling is become uniform wave web, in the 4th control module, uniform wave web rolling is become wave web heterogeneous up and down again, to deepen near the wave impression in territory, one lateral areas, lower flange, then the wave impression near territory, one lateral areas, top flange is elongated automatically, web just forms arch automatically like this, on in the 5th control module, welding at last, bottom wing listrium and wave web heterogeneous up and down finally obtain wave web steel arch.Each step of process is all finished under computer control.

Specify the assistant formation step below in conjunction with accompanying drawing 1～7:

1) establishment computer control module, and is connected formation assistant formation operating platform with automatic welding machine with blanking machine, forming mill, special roller mill.Computer control module is divided five: first control module, second control module, the 3rd control module, the 4th control module, the 5th control module.

2) first control module is a cutting module.

Input parameter comprises: the wave number n that the wave web of steel arch comprises, each wave wavelength (in the axis of this web) l of the wave web of steel arch, the wave web height h of steel arch ₀, the wave amplitude height f of uniform wave web, design radius-of-curvature (in this web axis) R of the wave web of steel arch, the last wave amplitude height of the wave web of steel arch and the minimum value α of the ratio of uniform wave web wave amplitude height f; Design arc length (in this web axis) L=nl of the wave web by calculating steel arch;

There is minimum limit value in wave web wave amplitude height f uniformly, determines by following method:

When the bending of the wave web of steel arch reaches design radius of curvature R (in the axis of this web), reaching minimum value α as if the wave web that this moment, steel encircleed near the wave amplitude height ft of top flange one lateral edges and the ratio of uniform wave web wave amplitude height f, then the wave web of steel arch is at the minimum value f of the wave amplitude height of close top flange one lateral edges _TminFor:

f _t?min＝αf

Obtain the wavelength of the wave web of steel arch this moment at close top flange one lateral edges by finding the solution down to establish an equation, it reaches maximal value l _Tmax:

${\∫}_0^{l_{t\max }}\sqrt{1+{\left[\frac{d\left(f_{t\min }\sin (2\mathrm{\πx}/l_{t\min })\right)}{\mathrm{dx}}\right]}^2}\mathrm{dx}=s/n$

Passing ratio concerns, obtains the minimum value l of uniform wave web wavelength _MinFor:

$l_{\min }=l_{t\max }\frac{R}{R+h_0/2}$

Obtain the minimum value f of uniform wave web wave amplitude by finding the solution down to establish an equation _MinFor:

${\∫}_0^{l_{\min }}\sqrt{1+{\left[\frac{d\left(f_{\min }\sin (2\mathrm{\πx}/l_{\min })\right)}{\mathrm{dx}}\right]}^2}\mathrm{dx}=s/n$

When input parameter, need guarantee f＞f _Min

Can obtain the blank size of flat web and upper and lower edge of a wing flat board by numerical evaluation by computing machine:

The cutting length of flat web Wherein

The length L of top flange flat board _Ft,

The length L of lower flange flat board _Fd, The width b of upper and lower edge of a wing flat board.

With s and h ₀As the length and the width of blanking, export to blanking machine, can obtain a rectangular flat web; With L _FtWith length and the width of b as blanking, export to blanking machine, can obtain the top flange flat board; With L _FdWith length and the width of b as blanking, export to blanking machine, can obtain the lower flange flat board.

3) second control module is for being upper and lower flange plate cold roll forming module:

As shown in Figure 1, input parameter comprises: the design radius of curvature R of the wave web of steel arch, and in the axis of this web, the wave web height h of steel arch ₀

Top flange flat board and lower flange flat board are passed through forming mill respectively, and it is R+h that the top flange plate bending is become radius-of-curvature ₀/ 2 arch sheet, it is R-h that the lower flange plate bending is become radius-of-curvature ₀/ 2 arch sheet just forms the upper and lower flange plate that described steel encircles.

4) the 3rd control module is uniform wave web rolling module:

Shown in Fig. 2～3, input parameter comprises: the wave number n that the wave web of steel arch comprises, the wave amplitude height f of wave web uniformly.

Parameter is exported to special even wave web roller mill, as control variable, flat web carries out rolling by even wave web roller mill with the wave amplitude height, can a rolling become uniform wave web, it comprises n wave, and the wave amplitude height of each wave is f.

5) the 4th control module is a wave web rolling module heterogeneous up and down:

Input parameter comprises: wave web design radius-of-curvature (in the axis of this web) R of steel arch.

Obtain following parameter by calculating: shown in Fig. 4～5, under a proportional relationship, wave web heterogeneous up and down is at the wavelength at the intensification indented region edge of close lower flange one side

According to the length overall principle of invariance, deepen the wave amplitude design height f at indented region edge near lower flange one side by finding the solution down the wave web that can obtain steel arch of establishing an equation _d:

${\∫}_0^{l_d}\sqrt{1+{\left[\frac{d\left(f_d\sin (2\mathrm{\πx}/l_d)\right)}{\mathrm{dx}}\right]}^2}\mathrm{dx}=s/n$

Parameter is exported to special non-homogeneous wave formula web roller mill up and down, with near the wave amplitude height at edge, territory, one lateral areas, lower flange as control variable, deepen wave impression near territory, one lateral areas, lower flange, make the wave amplitude height at the edge of close lower flange one side reach fd, then the wave impression in territory, one lateral areas is elongated automatically along the top flange, can form wave web heterogeneous up and down automatically like this, finish the processing of the wave web of steel arch.

6) the 5th control module is a welding module:

At first the wave web of upper and lower flange plate and steel arch is carried out contraposition according to moulding position shape, automatic welding machine carries out single pass along the contact site of the wave web of upper and lower flange plate and steel arch then, determine path of welding, automatic welding machine welds along path of welding then, the wave web that can connect upper and lower flange plate and steel arch, the final wave web steel arch that forms, as shown in Figure 6.

Above-mentioned forming step process flow diagram is seen Fig. 7.

Claims (1)

1. a kind of area of computer aided forming method of wave web steel arch, it is characterized in that, described method be at one by computing machine, blanking machine, wave web roller mill, realization according to the following steps in the wave web steel arch area of computer aided formation system formed of wave web roller mill heterogeneous and bonding machine up and down uniformly:

Step (1): in described computing machine, set following five control modules, wherein:

First control module is a cutting module, controls the blanking of flat web and upper and lower edge of a wing flat board, imports following design parameter:

1) the wave number n that comprises of the wave web of steel arch is setting value;

2) the wavelength l of each wave of the wave web of steel arch, the wave web axis in the steel arch is setting value;

3) the wave web design arc length L of steel arch is in the wave web axis of steel arch, L=nl;

4) the wave web height h of steel arch ₀, be setting value;

5) the wave web design radius of curvature R of steel arch, the wave web axis in the steel arch is setting value;

6) the wave web cutting length s of steel arch,

Wherein y represents along the wave web side surface direction of steel arch, and x represents that f is the wave amplitude height of uniform wave web, is setting value along the wave web length direction of steel arch;

7) the wave web of steel arch is near the wave amplitude height f of top flange one lateral edges _tUltimate value α with the ratio of uniform wave web wave amplitude height f is setting value;

8) the minimum wave amplitude height of the wave of wave web is f uniformly _MinSo the wave amplitude height f of the wave of wave web need satisfy f＞f uniformly _Min, f _MinCan determine by following formula:

${\∫}_0^{l_{\min }}\sqrt{1+{\left[\frac{d\left(f_{\min }\sin (2\mathrm{\πx}/l_{\min })\right)}{\mathrm{dx}}\right]}^2}\mathrm{dx}=s/n$

$l_{\min }=l_{t\max }\frac{R}{R+h_0/2}$

${\∫}_0^{l_{t\max }}\sqrt{1+{\left[\frac{d\left(f_{t\min }\sin (2\mathrm{\πx}/l_{t\min })\right)}{\mathrm{dt}}\right]}^2}\mathrm{dx}=s/n$

f _t?min＝αf

In the formula, l _MinBe the uniform minimum wavelength of the wave of wave web, l _TmaxBe the wave web of steel arch maximal value, f near top flange one lateral edges wavelength _TminMinimum value for the last wave amplitude height of the wave web of steel arch;

9) the top flange plate length L of described steel arch _Ft,

10) the bottom wing listrium length L of described steel arch _Fd,

11) the width b of the upper and lower flange plate of described steel arch is setting value;

Second control module is flange plate cold roll forming module, controls the upper and lower flange plate that the dull and stereotyped clod wash in the upper and lower edge of a wing becomes described steel arch;

The 3rd control module for uniform wave web rolling module, is controlled flat web and is rolled into uniform wave web;

The 4th control module is wave web rolling module heterogeneous up and down, controls uniform wave web and is rolled into wave web heterogeneous up and down, imports following parameter:

Described wave web heterogeneous up and down is at the wavelength l at the intensification indented region edge of close lower flange one side _d, $l_d=\frac{R-h_0/2}{R}l;$

Described wave web heterogeneous up and down is at the wave amplitude design height f that deepens the indented region edge near lower flange one side _d, calculate according to the following equation:

${\∫}_0^{l_d}\sqrt{1+{\left[\frac{d\left(f_d\sin (2\mathrm{\πx}/l_d)\right)}{\mathrm{dx}}\right]}^2}\mathrm{dx}=s/n$

The 5th control module is welding module, in order to weld the upper and lower flange plate of described wave web heterogeneous up and down and described steel arch;

Step (2): first control module is a cutting module, controls the blanking of flat web and upper and lower edge of a wing flat board, and its step is as follows:

Step (2.1): described computing machine is imported three groups of data to blanking machine, is respectively: s and h ₀L _FtAnd b; L _FdAnd b;

Step (2.2): blanking machine is according to three groups of data, and blanking forms three blocks of laths: with s and h ₀As the length and the width of blanking, export to blanking machine, can obtain a rectangular flat web; With L _FtWith length and the width of b, can obtain the top flange flat board as blanking; With L _FdWith length and the width of b, can obtain the lower flange flat board as blanking;

Step (3): second control module is controlled the dull and stereotyped clod wash in the described upper and lower edge of a wing plate that overarches, and its step is as follows:

Step (3.1): described computing machine is transferred following parameter and is conveyed into forming mill: the wave web design radius of curvature R of steel arch, and in the wave web axis of steel arch, the wave web height h of steel arch ₀

Step (3.2): described forming mill is according to input parameter, and it is R+h that the top flange plate bending of described steel arch is become radius-of-curvature ₀/ 2 arch sheet, it is R-h that the lower flange plate bending of described steel arch is become radius-of-curvature ₀/ 2 arch sheet forms the upper and lower flange plate that described steel encircles;

Step (4): the 3rd control module is controlled the rolling uniform wave web of described uniform wave web roller mill, and its step is as follows:

Step (4.1): described computing machine is transferred following parameter and is conveyed into described uniform wave web roller mill: the wave number n that the wave web of steel arch comprises, the wave amplitude height f of wave web uniformly;

Step (4.2): flat web carries out rolling by described uniform wave web roller mill, according to input parameter, serves as the control parameter with the wave amplitude height, and one time rolling forms uniform wave web, and it comprises n wave, and the wave amplitude height of each wave is f;

Step (5): the 4th control module is controlled wave web roller mill heterogeneous described uniform wave web is rolled into wave web heterogeneous up and down, and its concrete steps are as follows:

Step (5.1): described computing machine is transferred following parameter and is sent to described wave web roller mill heterogeneous up and down: the wave number n that the wave web of steel arch comprises, the wave web of steel arch is near the wave amplitude design height f of lower flange one side _d

Step (5.2): uniform wave web is passed through described wave web roller mill heterogeneous up and down, with the wave amplitude height near the edge of lower flange one side is the control parameter, deepen wave impression, make the wave amplitude height at the edge of close lower flange one side reach f near lower flange one side _d, and be stretched automatically near the wave impression of top flange one side, just form wave web heterogeneous up and down;

Step (6): described wave web heterogeneous up and down of the 5th control module control and described upper and lower flange plate welding form described wave web steel arch, and its step is as follows:

Step (6.1): aim at described upper and lower flange plate and described wave web heterogeneous up and down according to moulding position shape;

Step (6.2): automatic welding machine carries out single pass along described upper and lower flange plate and described wave web heterogeneous contact site up and down, determines path of welding;

Step (6.3): the path of welding that automatic welding machine is determined in the step (6.2) welds, and can connect described upper and lower flange plate and described wave web heterogeneous up and down, finally forms wave web steel arch.

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