CN102528395A - Forming method of rectangular pipeline formed by plane cutting - Google Patents
Forming method of rectangular pipeline formed by plane cutting Download PDFInfo
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- CN102528395A CN102528395A CN2011104590447A CN201110459044A CN102528395A CN 102528395 A CN102528395 A CN 102528395A CN 2011104590447 A CN2011104590447 A CN 2011104590447A CN 201110459044 A CN201110459044 A CN 201110459044A CN 102528395 A CN102528395 A CN 102528395A
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Abstract
The invention discloses a forming method of a rectangular pipeline formed by plane cutting. The rectangular pipeline consists of a rectangular pipe and a first channel steel and a second channel steel which are arranged at the two ends of the rectangular pipe, the central line of the rectangular pipe is a straight line in a common position in a spatial system of rectangular coordinates, the connecting face of the rectangular pipe with the first channel steel and the connecting face of the rectangular pipe with the section channel steel are two parallel planes and the two planes are parallel with a basic projective plane of the spatial system of rectangular coordinates. The rectangular pipeline is formed according to the following steps: analyzing the shape-position relationship of the rectangular pipeline in the spatial system of rectangular coordinates, setting a projective plane to obtain the length of the central line of the rectangular pipe, and fixing the intersection point of each edge line of the rectangular pipe and the projective line of each of two connecting faces; obtaining the precise expansion pattern of the rectangular pipe; blanking; and finally welding to finish the manufacturing of the rectangular pipeline. The forming method has the advantages that the result is accurate, the process flow is simplified and the cost is reduced. The forming method is practically significant to the design and expansion of the rectangular pipeline and provides a theoretical basis for the computer aided design of the rectangular spatial pipeline.
Description
Technical field
The present invention relates to a kind of forming method of complicated morpheme rectangular tube, relate in particular to a kind of pipeline from as general locus, and the forming method of the rectangular duct that the back forms is also cut off at its two ends by the two general position planes that are parallel to each other.
Background technology
Space pipeline is widely used in engineerings such as machinery, chemical industry, building, metallurgy and shipbuilding, and except that cylindrical tube, rectangular duct is particularly common; In pipe design; The two ends that usually require a rectangular duct are respectively to connect the two axial lines pipelines with staggered, and therefore, in the panel beating of rectangular steel pipe steel construction or ventilation duct, often will solve such as two ends is connection and the problem of unfolded surface of the rectangular duct of plane bevel; For example, be similar to the morpheme state of rectangular tube 1 among Fig. 1 to Fig. 3.In conjunction with Fig. 1 and Fig. 2 Fig. 3; The locus that can find out rectangular tube 1 is a general position; And its two ends respectively by the general position plane cut off the back be connected with second channel-section steel 3 with first channel-section steel 2, in Fig. 1, Fig. 2 and Fig. 3, can't draw the center line physical length L of this rectangular tube like this
2, therefore, the expansion setting-out in the processing of the sheet metal of this rectangular tube moulding in the involved blanking operation has bigger difficulty.Present such as " in the reference book that panel beating worker unfolding calculation handbook is a type, also not seeing has the how record of unfolding and cutting of the rectangular tube of this complicacy morpheme.In the sheet metal processing of complicated morpheme parts,, just realize the moulding of these parts in fact easily if successfully accomplished the operation of its expansion setting-out.With the example that is shaped to of the rectangular duct of above-mentioned complicated morpheme, its traditional blanking process is: earlier according to drawing requirement, first channel-section steel 2 and second channel-section steel 3 at rectangular tube two ends are manufactured by actual size, position, finished center line; Get one section rectangular tube more longer again, then this section rectangular tube is placed relative first channel-section steel 2 and the most approaching side of second channel-section steel, 3 virtual conditions than actual size; Press the actual morpheme state of rectangular tube 1 in the drawing, the line of cut of blanking is surveyed and drawn out in simulation, presses the line blanking then.Adopt this blanking method, its error ratio is bigger, need further repair toward contact.In case the section ratio of rectangular tube 1 is bigger, the technology that then adopts is just very loaded down with trivial details, needs the scaled lamina papyracea of making earlier, after a little repairs out suitable model, again model is amplified to life size and carries out blanking.No matter being to adopt above-mentioned which kind of blanking operation, can only be a kind of approximate shape at most, exists bigger error, directly influences the geometric properties of the parts of final molding, even all can bring a lot of negative influences for use in the future.
Summary of the invention
To above-mentioned prior art; The present invention provides a kind of forming method of the rectangular duct that is cut off by the plane, in this forming method, utilizes scientific theory for according to the technical barrier that has solved expansion setting-out in the blanking operation, and its result is accurate; But not be analog approximation; Not only guaranteed should the complicacy morpheme rectangular tube and the quality of connection of two end connections, and simplified operation, reduced cost.The present invention is to the rectangular duct design and launch that Practical significance is arranged, for CAD coffin pipeline provides theoretical foundation.
In order to solve the problems of the technologies described above; The technical scheme that the forming method of the rectangular duct that the present invention is cut off by the plane is achieved is: this rectangular duct is made up of rectangular tube and first channel-section steel and second channel-section steel that are arranged on these rectangular tube two ends; The center line of said rectangular tube is the general position straight line at rectangular coordinate system in space; The joint face of the said rectangular tube and first channel-section steel and said rectangular tube and second channel-section steel is two planes that are parallel to each other, and two planes are parallel with a Basic projection plane of rectangular coordinate system in space; Said rectangular duct is according to the following steps moulding:
Step 1: analyze the morpheme relation be in the rectangular duct in the rectangular coordinate system in space, will be parallel to the rectangular tube center line and confirm as perspective plane (f perpendicular to a plane of the joint face of said rectangular tube and first channel-section steel and the said rectangular tube and second channel-section steel simultaneously
1-f
1); (f on this perspective plane
1-f
1), the centerline length of said rectangular tube is L, and it is two parallel straight lines that said rectangular tube is assembled with the projection of the joint face of second channel-section steel with first channel-section steel and said rectangular tube, and the spacing of two straight lines is L1;
Step 2: the centerline length L that draws rectangular tube; And on this perspective plane, each bar crest line of confirming said rectangular tube respectively with the said rectangular tube and the first channel-section steel joint face projection line, and the joining of the said rectangular tube and the second channel-section steel joint face projection line;
Step 3: flatten, obtain the expanded view of accurate rectangular tube;
Step 4:, reserve the interface allowance according to the thickness and the joint form of used metallic plate; Blanking;
Step 5: sheet metal bending back welding is formed rectangular tube, and first channel-section steel and second channel-section steel are connected to the two ends of rectangular tube, accomplish the making of rectangular duct.
Say that further said step 1, step 2 and step 3 can be carried out in AutoCAD.
Compared with prior art, the invention has the beneficial effects as follows:
Traditional approximate way ratio that method of deploying of the present invention and front are said has had very big difference, has not been the approximation method of simulation mapping.But a kind of have theoretical according to and expansion setting-out method accurately." method of introducing in the panel beating worker unfolding calculation handbook is similar, still also belongs to the method for manual expansion setting-out with at present.But along with development of science and technology, the fast enterprise of part science and technology upgrading is arranged at present, adopted manual advanced sheet-metal unfolding software to make more accurately expansion setting-out figure.But, present panel beating, the steel construction manufacturer that in China's industry, still has major part, still also " method of the manual expansion setting-out of introducing in the panel beating worker unfolding calculation handbook is carried out processing and fabricating in employing.In addition, even if comparatively advanced sheet-metal unfolding software is that the basis is developed with above these traditional hand Expansion Theory all also.So; At present advanced expansion software has been arranged though we think, but should understand and grasp so manual method of deploying, this is for running into more complicated sheet-metal unfolding aborning; So that the sheet-metal unfolding software that exploitation is more complicated can play one with reference to using for reference and the step effect.So the present invention is to the rectangular duct design and launch that Practical significance is arranged, not only the result is accurate; Guaranteed should the complicacy morpheme rectangular tube and the quality of connection of two end connections; Simplified operation, reduced cost, but also theoretical foundation is provided for CAD coffin pipeline.
Description of drawings
Fig. 1 is the front view of a rectangular steel pipe steel construction instance
Fig. 2 is the vertical view of rectangular steel pipe steel construction instance shown in Figure 1
Fig. 3 is the A-A cutaway view of rectangular steel pipe steel construction instance shown in Figure 1;
Fig. 4 is that the B of rectangular steel pipe steel construction instance shown in Figure 3 is to view;
Fig. 5 be on the rectangular tube shown in Fig. 41 each bar crest line on the channel-section steel plane connecting line h, h
1On the joining sketch map;
Fig. 6 is to be the expansion setting-out figure of rectangular tube 1 shown in Fig. 3.
Among the figure:
The 1-rectangular tube, 2-first channel-section steel, 3-second channel-section steel, 4-base plate, g-rectangular tube two end sections, f-rectangular tube center line;
(center line) true length of L-rectangular tube 1,
The distance of L1-rectangular tube 1 (center line) two-end-point on the OX axle;
The distance of L2-rectangular tube 1 (center line) two-end-point on the OY axle;
The distance of L3-rectangular tube 1 (center line) two-end-point on the OZ axle;
The length of L4-rectangular tube 1 (center line) two-end-point on the YOZ perspective plane.
The specific embodiment
Below in conjunction with the specific embodiment the present invention is done to describe in further detail.
As shown in Figure 1; The forming method of a kind of rectangular duct that cuts off by the plane of the present invention; This rectangular duct is made up of rectangular tube 1 and first channel-section steel 2 and second channel-section steel 3 that are arranged on these rectangular tube 1 two ends; The center line of said rectangular tube 1 is the general position straight line at rectangular coordinate system in space, and the joint face of the said rectangular tube 1 and first channel-section steel 2 and the said rectangular tube 1 and second channel-section steel 3 is two planes that are parallel to each other, and two planes are parallel with a Basic projection plane of rectangular coordinate system in space; As shown in Figure 1, rectangular tube 1 right-hand member is connected with first channel-section steel 2, and rectangular tube 1 left end is connected with second channel-section steel 3, and the central point that both sides connect the plane has a difference in height, and promptly the distance of rectangular tube 1 (center line) two-end-point on the OZ axle is L3; In like manner; As shown in Figure 2; Rectangular tube 1 right-hand member is connected with first channel-section steel 2, and rectangular tube 1 left end is connected with second channel-section steel 3, and the central point that both sides connect the plane has an offset distance on the OY axle; Be that the distance of rectangular tube 1 (center line) two-end-point on the OY axle is L2, from Fig. 3, can more know to show this distance L 2; Like Fig. 1 and shown in Figure 4, the side-play amount that relative its left end of rectangular tube 1 right-hand member makes progress, promptly the distance of rectangular tube 1 (center line) two-end-point on the OZ axle is L3; In addition, in Fig. 3, also can find out the distance L 4 of rectangular tube 1 (center line) two-end-point in the YOZ perspective plane simultaneously.
For the rectangular duct of above-mentioned locus, can be according to the following steps moulding:
Step 1: analyze the morpheme relation (as stated) be in the rectangular duct 1 in the rectangular coordinate system in space, will be parallel to rectangular tube 1 center line and confirm as perspective plane f perpendicular to a plane of the joint face of said rectangular tube 1 and first channel-section steel 2 and the said rectangular tube 1 and second channel-section steel 3 simultaneously
1-f
1The f on this perspective plane
1-f
1On, the centerline length of said rectangular tube 1 is L, it is two parallel straight line h, h that said rectangular tube 1 is assembled with the projection of the joint face of second channel-section steel 3 with first channel-section steel 2 and said rectangular tube 1
1, the spacing of two straight lines is L1; Like this with the f among Fig. 3
1-f
1Line is as the position on a perspective plane, with the vertical direction on this perspective plane just with B to being that projecting direction is to f
1-f
1Orthographic projection is done on the perspective plane, thereby has obtained B as shown in Figure 4 to view.
To view, can obtain the center true length L of rectangular tube 1 in conjunction with the B of the A-A cutaway view of Fig. 3 and Fig. 4; The centre distance L4 of the inclination and offset of rectangular tube 1 in the f1 perspective plane; The distance L of the first and second channel-section steel opposite planar
1Projection line h, the h on rectangular tube 1 two ends and channel-section steel plane
1And the center line f of rectangular tube 1.Under the situation of known above-mentioned L1, L2 and L3 numerical value, the centerline length L of said rectangular tube 1 can adopt the right angled triangle method to draw, and repeats no more at this;
Step 2: the centerline length L that draws rectangular tube 1; And on this perspective plane f
1-f
1On, each bar crest line of confirming said rectangular tube 1 respectively with said rectangular tube 1 and first channel-section steel, 2 joint face projection line h, and said rectangular tube 1 and second channel-section steel, 3 joint face projection line h
1Joining; In order to obtain on the rectangular tube 1 each bar crest line at two channel-section steel plane projection line h, h
1The position of last joining; In the concrete mapping; Elder generation duplicates rectangular tube sectional view g among Fig. 3 and is pasted on B in view by the B projecting direction together with center line e; And the center line e that makes the sectional view g of rectangular tube 1 invests B in view on the center line f, and makes center line e and center line f two central lines, thereby draws Fig. 5.That is, four summits of the sectional view g of rectangular tube 1 are respectively a, b, c, d; Make the parallel lines a of center line f respectively through summit a, b, c, the d at four angles on the square-section among the sectional view g
1, b
1, c
1, d
1, and make each line intersect at channel-section steel plane projection line h, the h at rectangular tube 1 two ends
1On, thereby obtained crossing each point a
0, b
2, c
2, d
0And a
2, b
2, c
2, d
2The mark of each joining in Fig. 5 of the said rectangular tube and the first channel-section steel joint face projection line h is respectively a
2, b
2, c
2, d
2The said rectangular tube and the second channel-section steel joint face projection line h
1The mark of each joining in Fig. 5 be respectively a
0, b
0, c
0, d
0
Step 3: flatten, obtain the expanded view of accurate rectangular tube 1;
Through above-mentioned each joining a
0, b
0, c
0, d
0And a
2, b
2, c
2, d
2Direction is a to the same side
1, b
1, c
1, d
1The vertical line of each line.As shown in Figure 6, be a respectively to the vertical line direction again
1, b
1, c
1, d
1The parallel lines of each line, and make a
1To b
1, b
1To c
1, c
1To d
1, d
1To a
1Each line spacing distance equals the distance of a to b, b to c, c to d, d to a among the sectional view g respectively.Each parallel lines and each vertical line of making produce new joining: a again
0/1, b
0/1, c
0/1, d
0/1And a
2/1, b
2/1, c
2/1, d
2/1According to a
1, b
1, c
1, d
1Each line is connecting line h, h on the channel-section steel plane
1The respective sequence of last each point is with a
0/1, b
0/1, c
0/1, d
0/1And a
2/1, b
2/1, c
2/1, d
2/1Couple together the unfolding and cutting figure that has just become this rectangular tube 1 Deng each point, see the profile shown in the group lines among Fig. 6 for details, so far, accomplished the expansion of this rectangular tube.
Step 4:, reserve the interface allowance according to the thickness and the joint form of used metallic plate; Blanking;
Step 5: sheet metal bending back welding is formed rectangular tube 1, and first channel-section steel 2 and second channel-section steel 3 are connected to the two ends of rectangular tube 1, the making of completion rectangular duct.
The forming method of rectangular duct of the present invention has very strong practicality in the panel beating moulding process; Since in the prior art for the blanking of this complicacy morpheme rectangular duct can only accomplish be approx, general, simulate formation material; Exist error bigger; Forming method of the present invention has solved and has perplexed for a long time for space rectangular duct blanking technical barrier accurately not always, and theoretical foundation and practical experience is provided for CAD coffin pipeline in the future.
Although invention has been described for top combination figure; But the present invention is not limited to the above-mentioned specific embodiment, and the above-mentioned specific embodiment only is schematically, rather than restrictive; Those of ordinary skill in the art is under enlightenment of the present invention; Under the situation that does not break away from aim of the present invention, can also make a lot of distortion, these all belong within the protection of the present invention.
Claims (2)
1. the forming method of a rectangular duct that cuts off by the plane; This rectangular duct is made up of rectangular tube (1) and first channel-section steel (2) and second channel-section steel (3) that are arranged on this rectangular tube (1) two ends; The center line of said rectangular tube (1) is the general position straight line at rectangular coordinate system in space; Said rectangular tube (1) is two planes that are parallel to each other with the joint face of first channel-section steel (2) and said rectangular tube (1) and second channel-section steel (3), and two planes are parallel with a Basic projection plane of rectangular coordinate system in space;
It is characterized in that: according to the following steps moulding:
Step 1: analyze the morpheme relation that is in the rectangular duct (1) in the rectangular coordinate system in space, will be parallel to rectangular tube (1) center line and confirm as perspective plane (f perpendicular to said rectangular tube (1) and first channel-section steel (2) and said rectangular tube (1) with a plane of the joint face of second channel-section steel (3) simultaneously
1-f
1); (the f on this perspective plane
1-f
1) on, the centerline length of said rectangular tube (1) is L, it is two parallel straight lines (h, h that said rectangular tube (1) is assembled with the projection of the joint face of second channel-section steel (3) with first channel-section steel (2) and said rectangular tube (1)
1), the spacing of two straight lines is L1;
Step 2: the centerline length L that draws rectangular tube (1); And on this perspective plane (f
1-f
1) on, each bar crest line of confirming said rectangular tube (1) respectively with said rectangular tube (1) and first channel-section steel (2) joint face projection line (h), and said rectangular tube (1) and second channel-section steel (3) joint face projection line (h
1) joining;
Step 3: flatten, obtain the expanded view of accurate rectangular tube (1);
Step 4:, reserve the interface allowance according to the thickness and the joint form of used metallic plate; Blanking;
Step 5: sheet metal bending back welding is formed rectangular tube (1), and first channel-section steel (2) and second channel-section steel (3) are connected to the two ends of rectangular tube (1), the making of completion rectangular duct.
2. the forming method of the rectangular duct that is cut off by the plane according to claim 1, it is characterized in that: said step 1, step 2 and step 3 are carried out in AutoCAD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110459044 CN102528395B (en) | 2011-12-31 | 2011-12-31 | Forming method of rectangular pipeline formed by plane cutting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110459044 CN102528395B (en) | 2011-12-31 | 2011-12-31 | Forming method of rectangular pipeline formed by plane cutting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102528395A true CN102528395A (en) | 2012-07-04 |
| CN102528395B CN102528395B (en) | 2013-09-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110459044 Active CN102528395B (en) | 2011-12-31 | 2011-12-31 | Forming method of rectangular pipeline formed by plane cutting |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2369852Y (en) * | 1999-04-23 | 2000-03-22 | 赵凯德 | Flange forming mould for rectangular section ventilation pipeline |
| CN101153678A (en) * | 2006-09-29 | 2008-04-02 | 王春燕 | Rectangular convex connecting fitting for pipes |
| US20080302157A1 (en) * | 2005-12-29 | 2008-12-11 | Robert Bosch Gmbh | Method and Device For Producing Bent Spring Elements |
| CN101430033A (en) * | 2007-11-09 | 2009-05-13 | 王周城 | Rectangular convex connecting fittings for pipes |
-
2011
- 2011-12-31 CN CN 201110459044 patent/CN102528395B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2369852Y (en) * | 1999-04-23 | 2000-03-22 | 赵凯德 | Flange forming mould for rectangular section ventilation pipeline |
| US20080302157A1 (en) * | 2005-12-29 | 2008-12-11 | Robert Bosch Gmbh | Method and Device For Producing Bent Spring Elements |
| CN101153678A (en) * | 2006-09-29 | 2008-04-02 | 王春燕 | Rectangular convex connecting fitting for pipes |
| CN101430033A (en) * | 2007-11-09 | 2009-05-13 | 王周城 | Rectangular convex connecting fittings for pipes |
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| Publication number | Publication date |
|---|---|
| CN102528395B (en) | 2013-09-11 |
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