JPH0255625A - Blank layout method for elbow forming use steel plate stock and elbow formed by the same steel plate stock - Google Patents

Abstract

PURPOSE:To curtail a stock used for forming an elbow and to realize the inexpensiveness of the cost of a product by blanking the stock in a provided state that a one body-like elbow forming use steel plate stock and an opposed equal division-like steel plate stock are made adjacent alternately. CONSTITUTION:A steel plate 1 of standard width whose breadth conforms with breadth of an elbow forming use steel plate stock 2 is used. The one body-like elbow forming use steel plated stock 2, and that which allows equal division-like steel plate stocks 3, 4 of a shape which cuts said steel plate blank 2 by a longitudinal center line to oppose each other are made adjacent alternately and provided on the steel plate 1. In this state, blanking is executed. In such a way, the stock used for forming an elbow is curtailed, and the inexpensiveness of the cost of a product can be realized.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is applicable to forming an elbow using a steel plate as a raw material.
The production of steel sheets for multiple -In/revolving steel sheets from steel sheets of a fixed width can be made extremely rationally by minimizing the generation of residual materials, thus reducing the amount of materials used. The present invention also relates to a method for cutting a steel sheet material for elbow forming, which is characterized by a significant reduction in manufacturing costs, and to an elbow formed using this steel sheet material.

(Prior Art) As means for elbow forming, there are a method of forming using a steel pipe as a raw material and a method of forming using a steel plate as a raw material.

When a steel pipe is used as the material, the elbow is formed by means such as hot forming, cold forming, or high frequency forming.

If steel plate is used as the material, from a steel plate of standard width,
A steel plate material for elbow forming is cut out, and then compression molded using a predetermined mold to complete the elbow.

(Problem to be solved by the invention) In this case, there is no waste of materials used.

In this case, as shown in Fig. 7, since the elbow has the same shape as the required unfolded shape of the elbow for the regular length steel plate A, there is a triangular residual material C between each punched material as shown in the same figure. Therefore, the yield rate was extremely poor. In recent years, expensive stainless steel sheets have been widely used as the material for forming elbows, and the poor yield of these materials has inevitably led to a rise in product prices. .

The object of the present invention is to use the conventional steel plate as described above as a material.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the method for cutting a steel plate material for elbow forming according to the present invention provides a standard cutting method in which the width is matched with the width of the steel plate material for elbow forming. A wood-like steel plate material 2 for elbow forming, which has the same shape as the conventional steel plate material B for elbow forming, with respect to the steel plate 1,
The wood-like steel plate material 2 is shaped like being cut along its longitudinal center line, and the edge side of the steel plate 1 is provided with a joining edge 3a,
Equally divided side cane steel plate materials 3 and 4 for elbow forming, which are arranged opposite to each other and are arranged as shown in FIG. The facing form of the materials 3 and 4 is made such that the bent abdomen forming edges c and c of the equally divided steel sheet materials 3 and 4 are opposed to each other, and - the wood-like steel sheet material 2, etc. Minute cane steel plate material 3
. The upper end opening surface portion forming edge a is arranged so as to protrude into and adjoin the concave arcuate edge drawn by a, and furthermore, the next step integral steel plate material 2 is formed by the upper end opening surface portion forming edge a. The convex arch wires are arranged so as to protrude into and adjacent to the concave arc-shaped edges drawn by the lower end opening surface forming edges of the equally divided side cane steel plate materials 3 and 4, and are integrally formed as described above. This is characterized in that the steel plate blanks 2 and the opposing equally divided side steel plate blanks 3.4 are alternately arranged adjacent to each other and then cut out.

The elbow according to the present invention is the conventional elbow 3a,
Equally divided side cane steel plate material for elbow forming as 4a 3.4
are welded at their joining edges 3a and 4a.

(Function) The wood-like steel sheet material 2 for elbow forming, which has been cut out based on the method according to the present invention described above, is subjected to a known compression molding process to produce a shape as shown in FIGS. 2 and 3. , the equally divided side cane steel plate material 3.4 for elbow forming, which has a form completely unchanged from the conventional one, has its mutual joining edges 3a, 4a.
By welding and connecting the parts, and then performing a known compression molding process, as shown in Figs. In addition to the welded portion P, the welded portion Q of the joining edges 3a and 4a described above is formed on the surface thereof. However, the presence of the welded portion Q does not cause any problem in actual use as an elbow.

(Example) An example of the present invention will be described in detail with reference to the drawings as follows.

First, FIG. 6 shows a conventional steel plate material B cut from a steel plate of a standard width. In the same figure, a is the edge for forming the upper end opening surface of the elbow, b is the edge for forming the lower end opening surface of the elbow, C and C are the edges for forming the bent abdomen of the elbow, and d is the bending edge of the elbow. The part for forming the back is shown.

Then, the steel plate material B for elbow forming was subjected to a curved compression forming process using a predetermined mold so that the left and right curved abdomen forming edges c and c sides were matched, and then they were made to match. The elbow is completed by welding the edges c and c for forming the bent abdomen.

The method for cutting a steel sheet material for elbow forming according to the present invention allows cutting of multiple sheets of steel sheet material as described above from a steel plate of a fixed width to be performed extremely rationally by minimizing the generation of residual material. This is how it was done.

Hereinafter, specific embodiments of the method according to the present invention will be described in detail with reference to the drawings.

FIG. 1 specifically shows the cutting form of a steel plate material for elbow forming based on the method according to the present invention.

In Fig. 1, 1 is a steel plate with a fixed width whose width matches the width of the steel plate material for elbow forming, and is a material for continuous cutting of a plurality of steel plate materials for elbow forming. be.

The cutting form of the steel sheet material for elbow forming according to the method of the present invention is a monolithic steel sheet for elbow forming that has a shape exactly the same as the conventional steel sheet material B shown in FIG. 6 described above. A material 2, and equal-divided side rods for forming an elbow that are opposite to each other and have a shape similar to that of the integral steel sheet material 2 cut along its longitudinal center line, and the peripheral sides of the steel sheet 1 serve as joining edges 3a, 4a. Steel plate materials 3 and 4 are arranged alternately in the longitudinal direction of a steel plate 1 having a fixed width and are cut into sheets.

The above-mentioned equally divided side cane steel plate materials 3.4 for elbow forming are arranged in a state where their respective bending abdomen forming edge portions C and C are opposed to each other.

The adjacent form of the integral steel plate material 2 for elbow forming and the equally divided side steel plate materials 3 and 4 for elbow forming is the shape of the edge for forming the lower end opening surface portion of the elbow in the integral steel plate material 2. The convex arch wire is divided equally between side cane steel plate materials 3 and 4 that are facing each other.
The edges a and a for forming the upper end opening surface of the elbow are inserted into and adjacent to the concave arc-shaped edge drawn by the edges a and a, and the plates are cut out. Furthermore,
The integral steel sheet material 2 for forming an elbow in the next stage has a convex arc drawn by the edge a for forming the upper end opening surface portion, and the edge a for forming the lower end opening surface portion of the equally divided side cane steel sheet material 3.4. Part.

Cut the board so that it protrudes into and adjoins the concave arc-shaped edge drawn by b.

As described above, the integral steel plate material 2, the equally divided side steel plate materials 3 and 4 disposed opposite to each other, and the next stage integral steel plate material 2 are arranged adjacent to each other alternately. By removing the planks, the amount of leftover material generated due to the removal of the planks is minimized.

By subjecting the integral steel plate material 2 for elbow forming that has been cut out as described above to compression molding using a predetermined mold, an elbow as shown in FIGS. 2 and 3 is completed. be converted into In the same figure, P is the integral steel plate material 2
This is the welded portion of the bent abdomen forming edge C and C portion.

Next, the equally divided side cane steel plate materials 3 and 4 for elbow forming which have been cut out as described above are joined by welding the joining edges 3a and 4a to form the above-mentioned integral piece. It is formed into a steel sheet material having the same shape as the shaped steel sheet material 2.

By subjecting the steel plate material for elbow forming in such a joined state to compression molding using the same predetermined mold as above, an elbow as shown in Figures 4 and 5 is completed. be done.

In the figure, P is the welded part of the bending abdomen forming edges c and c of the equally divided side cane steel plate materials 3 and 4, and Q is the welded part of the above-mentioned joining edges 3a and 4a. .

The elbow according to the present invention has the configuration shown in FIGS. 4 and 5, that is, as described above, the
The side cane steel plate materials 3 and 4, which are equally divided for elbow forming, are welded together at their joining edges 3a and 4a.

The above-mentioned compression molding process is carried out in stages using a predetermined mold.

Conventionally, there are various methods for the compression molding process (for example, Japanese Patent Publication No. 35-8474, Japanese Patent Publication No. 35-8474,
No. 5-8475, Special Publication No. 35-15008, Special Publication No. 4
In the present invention, any conventional compression molding means may be employed for the compression molding process.

(Effects of the Invention) The method for cutting a steel sheet material for elbow forming according to the present invention provides an integral steel sheet material 2 for elbow forming that has a shape exactly similar to the conventional steel sheet material B for elbow forming, and the integral steel sheet material for elbow forming. Equally divided side cane steel plate material 3 for elbow forming, which has a shape similar to that of 2 cut along its longitudinal center line, and is arranged so as to face each other, with the edge sides of the steel plate 1 as described below serving as joining edges 3a, 4a. 4 and 4 are arranged alternately and adjacent to each other in the longitudinal direction of the steel plate 1 of a fixed width, so that the generation of residual material due to the planing is significantly reduced. becomes. Therefore, based on the reduction of materials used,
Product prices will be significantly lower.

In other words, with the conventional planing method as shown in Fig. 7, a residual material C of the steel plate for elbow forming, which has a shape equal to the unfolded shape of the required elbow, is inevitably generated for the regular length steel plate A. However, according to the method according to the present invention, such triangular residual material C is not generated at all, so that the purpose of reducing the amount of materials used can be achieved. .

In the elbow according to the present invention, the equally divided side cane steel plate materials 3 and 4 for elbow forming, which have the cut ends as the joining edges 3a and 4a, are packed with the joining edges 3a and 4a, and the above-mentioned This results in a reduction in the amount of materials used. The presence of the welded parts to the joining edges 3a and 4a does not pose any hindrance in the actual use of the elbow, so the presence of the welded parts has a compensatory negative effect on the above-mentioned effect of reducing the amount of materials used. It cannot be a factor.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, and FIG.
Figures 3 and 3 are perspective views of an integral steel sheet material 2 that has been plated based on the method according to the present invention, and Figures 4 and 5 are equally divided sides that have been plated based on the method according to the present invention. Using the cane steel plate materials 3 and 4, Fig. 5 is a perspective view as seen from the bent ventral side, Fig. 6 is a perspective view as seen from the side, Fig. 6 is a plan view showing conventional steel plate material B for elbow forming, and Fig. 7. 1 is a plan view showing a conventional method for cutting a steel plate material for elbow forming. ■...Steel plate with fixed width 2...Integrated steel plate material for elbow forming 3.4...Equivalent side cane steel plate material for elbow forming 3a, 4a
...Edge for joining a...Edge for forming the upper end opening surface portion of the elbow b...Edge for forming the lower end opening surface portion of the elbow c, c...Edge d for forming the bending abdomen of the elbow ...Part for forming the bending back of the elbow P...Welding part Q of the edge part for forming the bending abdomen...Welding part A of the joining edge part...Standard width steel plate B...Conventional Steel plate material 0
Figure 1 Figure 6 Figure 7

Claims (2)

[Claims] (1) For elbow forming, using a steel plate 1 with a fixed width whose width matches the width of the steel plate material for elbow forming, and giving the steel plate 1 a shape exactly the same as the conventional steel plate material B for elbow forming. A one-piece steel plate material 2, which has a shape similar to that of the one-piece steel plate material 2 cut along its longitudinal center line, and is arranged so as to face each other, with the edge sides of the steel plate 1 serving as joining edges 3a, 4a. Equally divided steel plate material for elbow forming 3, 4
are arranged alternately in the longitudinal direction of the steel plate 1 having a fixed width, and the above-mentioned equally divided side cane steel plate materials 3 and 4 are arranged in opposing form,
The equally divided steel plate materials 3 and 4 are placed in a state in which the edges c and c for forming the bent abdomen are opposed to each other, and the integral steel sheet material 2 and the equally divided side cane steel sheet materials 3 and 4 are made to face each other. , the convex arc edge drawn by the edge b for forming the lower end opening surface of the elbow in the integral steel plate material 2 is connected to the equally divided steel plate materials 3 and 4 in the opposing state.
The upper end opening surface portion forming edge portions a of the elbow are protruded into and adjacent to the concave arc-shaped edge drawn by a, and the next step integral steel plate material 2 is disposed for forming the upper end opening surface portion thereof. Edge a
The convex arc edge drawn by is arranged so as to protrude into and adjacent to the concave arc edge drawn by the lower end opening surface forming edges b and b of the equally divided steel plate materials 3 and 4, and as described above. A method for cutting a steel sheet material for elbow forming, which comprises cutting a one-piece steel sheet material 2 and opposing equally divided steel sheet materials 3 and 4 in a state in which they are alternately arranged adjacent to each other. (2) Equally divided steel sheet materials 3 and 4 for elbow forming, which have the same shape as the conventional steel sheet material B for elbow forming cut along its longitudinal centerline, and whose cut ends serve as joining edges 3a and 4a. The elbow is press-formed using a steel plate material for elbow forming, which is obtained by welding the joining edges 3a and 4a of the above.