JPH08139371A - Manufacture of series thermocouple - Google Patents

Abstract

PURPOSE: To facilitate simplification and automation of a manufacturing process and, further, facilitates mass-production of uniform and high quality products by a method wherein two types of different metal plates from which thermocouples are made are put together and their upper parts and lower parts are bonded to each other by welding, etc., to produce a plate element. CONSTITUTION: A copper plate and a constantan plate are put together and are mutually shifted horizontally by a distance corresponding to one square hole 3 or 4 so as to have the square hole 3 of the copper plate positioned between the square holes 4 of the constantan plate and have the square hole 4 of the constantan plate positioned between the square holes 3 of the copper plate. The upper edge parts and lower edge parts of both the plates are bonded to each other by seam welding, etc., to obtain a plate element composed of the integrated copper and constantan plates. Then the plate element is cut and upper linking parts 7b are folded forward along folding lines 13 of their centers and lower linking parts 8b are folded backwards along folding lines 14 of their centers to obtain a thermocouple integrated unit. With this constitution, a manufacturing process can be simplified and automated and, further, the mass-production of uniform and high quality products can be realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a series type thermocouple which generates high electromotive force by utilizing the combustion heat of gas combustion equipment.

[0002]

2. Description of the Related Art For example, in a series type thermocouple for supplying electric power to an electric load by utilizing combustion heat of a burner of a gas combustion apparatus, a plurality of thermocouple elements are integrated in order to obtain high electromotive force. Is used. For example, one thermocouple element can only obtain an electromotive force of 20 to 30 mV, so in a device that requires an electromotive force of 1.5 V, a thermocouple in which approximately 50 thermocouple elements are integrated. Requires an aggregate.

Therefore, the conventional series type thermocouple of this type is
For example, as shown in FIGS. 21 and 22, each of two different kinds of metal wire rods 1 ′, 2 ′ cut to a certain size are welded 9 ′, 10 ′ at the ends to form a zigzag pattern. Element coupling body B'in which a plurality of thermocouple elements C'are connected in a line
Are formed and integrated to form a thermocouple integrated body having a hot junction portion a ′ and a cold junction portion b ′.

[0004]

SUMMARY OF THE INVENTION In the above-mentioned conventional technique, one element connecting body B'in which a plurality of thermocouple elements C'is connected is provided one by one.
In particular, the welding process requires a great deal of time and a high degree of skill because it is a manufacturing process. Therefore, it is difficult to mass-produce uniform and high-quality products, resulting in a significant increase in product cost.

In view of the above problems of the prior art, the present invention provides a method for manufacturing a series type thermocouple capable of mass-producing uniform and high quality products in combination with the simplification and automation of the manufacturing process. Has an aim.

[0006]

According to a first method for manufacturing a series thermocouple of the present invention which solves the above-mentioned problems, two kinds of different metal plates forming a plurality of element pieces are overlapped with each other and an upper edge portion thereof is formed. And a first step of welding the lower edge portion to form a plate-shaped element body,
A second step of cutting the welded portion of the plate-shaped element body to form an element connection body in which a plurality of thermocouple elements, each of which is a set of two different element pieces, are connected, and each thermocouple of the element connection body. A third step of bending and polymerizing the elements to form a thermocouple assembly,
It is characterized by consisting of.

In the second method for manufacturing a series-type thermocouple of the present invention which solves the above-mentioned problems, a plurality of square holes having the same width and a plurality of square holes forming a plurality of element pieces are cut out in parallel. A plate in which two different metal plates are integrally polymerized by stacking two different metal plates by laterally shifting one square hole and welding the upper and lower edges by welding or the like. The first step of forming a strip-shaped element body, and cutting and separating the upper edge welded portion and the lower edge welded portion of the plate-shaped element body along one side edge of each square hole to form two different element pieces. The second step of forming an element connecting body in which a plurality of thermocouple elements forming a set are connected, and the thermocouple elements of each of the above-mentioned element connecting bodies are bent and polymerized at the upper connection portion and the lower connection portion in opposite directions. And a third step of producing a thermocouple integrated body.

According to a third method for manufacturing a series-type thermocouple of the present invention, which solves the above-mentioned problems, two kinds of different metal plates formed by cutting out a plurality of element pieces at the same interval are used. A first step of inverting and superimposing, and welding the upper edge portion and the lower edge portion by welding or the like to form a plate-shaped element body in which two different metal plates are integrally polymerized; and the plate-shaped element body 2. Cut the welded part of each element along one side edge of each element piece to separate
A second step of forming an element connection body in which a plurality of thermocouple elements, each of which is a set of different element pieces, are connected, and the thermocouple elements of each of the element connection bodies are turned upside down in the upper connection portion and the lower connection portion. And a third step of bending and polymerizing in a direction to form a thermocouple assembly.

[0009]

According to the first method for manufacturing a series-type thermocouple of the present invention having the above-described structure, in the first step, two types of thermocouples which are formed by cutting out the square holes forming a plurality of element pieces are formed. Different metal plates are superposed, and their upper and lower edges are welded together by welding or the like to form a plate element body.

Then, in the second step, the two different kinds of element pieces form a set at the welded portion of the plate-like element body in which the two different kinds of metal plates produced in the first step are integrally polymerized. A plurality of thermocouple elements, each of which is a set of two different element pieces, are cut and separated to form an element connection body.

Further, in a third step, each thermocouple element of the element connecting body produced in the second step is connected to an upper connecting portion of two different element pieces and a lower connecting portion of two different element pieces. A thermocouple assembly is produced by bending and polymerizing in the section.

Since the required electromotive force (high electromotive force) is uniformly generated in the manufacturing process of the above first to third steps, a good quality series type thermocouple can be efficiently manufactured.
Mass production is possible and the product cost can be reduced.

According to the second method for manufacturing a series-type thermocouple of the present invention having the above-mentioned structure, in the first step, a plurality of square holes having the same width for forming the thermocouple elements of the number required to generate the necessary electromotive force are formed. Two kinds of different metal plates, which are formed by cutting out in parallel with each other between the square holes forming a plurality of element pieces, are laterally shifted by one square hole and are overlapped in the front-rear direction, and the upper and lower edges thereof are formed. The parts are welded together by welding or the like to form a plate-shaped element body in which two different metal plates are integrally polymerized.

In the second step, the upper edge welded portion and the lower edge welded portion of the plate-shaped element body produced in the first step are provided along one side edge of each square hole, for example, the upper edge. The welded portion is cut along the left side edge of the square hole, and the lower edge welded portion is cut along the right side edge of the square hole to separate the upper and lower welded portions alternately. An element connecting body in which thermocouple elements each including an element piece are connected is made.

Further, in the third step, the thermocouple elements of the element connecting body produced in the second step are alternately bent up and down from the centers of the upper connecting portion and the lower connecting portion, for example, The upper connecting part is bent forward and the lower connecting part is bent backward and each thermocouple element formed by two different kinds of metal plate element pieces is polymerized and integrated to form a thermocouple having a hot junction portion and a cold junction portion. Make an aggregate.

Since the required electromotive force (high electromotive force) is uniformly generated in the manufacturing process of the above-mentioned first to third steps, and a good quality series type thermocouple can be efficiently manufactured,
Mass production is possible and the product cost can be reduced.

According to the third method for manufacturing a series thermocouple of the present invention having the above-mentioned structure, in the first step, a plurality of element pieces for producing thermocouple elements of the number that the necessary electromotive force is generated are arranged at the same intervals. Two different kinds of metal plates that are cut out and formed are stacked by inverting one metal plate and welding the upper edge and the lower edge by welding or the like to integrally polymerize the two different metal plates. Make a plate-shaped element body.

Then, in the second step, the welded portion of the plate-like element body produced in the first step is provided along one side edge of each element piece, for example, the lower edge welded portion is provided on one element piece. Along the right side edge of the other element piece, and along the left side edge of the other element piece, the thermocouple element, which is a set of two different kinds of element pieces that generate the necessary electromotive force, is formed at the upper and lower connecting portions. Create a series of connected elements.

Further, in a third step, each thermocouple element of the element coupling body produced in the above-mentioned second step is bent up and down in opposite directions from the center of the upper coupling portion and the lower coupling portion. Each thermocouple element is polymerized and integrated to form a thermocouple assembly having a hot junction and a cold junction.

Since the necessary electromotive force (high electromotive force) is generated in the manufacturing process of the above first to third steps, a uniform and good quality series type thermocouple can be efficiently manufactured.
Mass production is possible and the product cost can be reduced.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a method for manufacturing a series thermocouple of the present invention will be described below with reference to the drawings.

First Embodiment (see FIGS. 1 to 7 and 19) As a combination of two different metal plates 1 and 2 constituting a thermocouple, for example, metal plates such as copper and constantan, chromel and constantan are used. In the first step, a horizontally elongated rectangular metal plate such as copper or chromel (which will be simply referred to as a copper plate in the following description of the first embodiment) 1 that can be formed by the thermocouple elements C in which the necessary electromotive force is generated and a constantan And the like (hereinafter, simply referred to as a constantan plate in the description of the first embodiment) 2 and a required number of vertically long rectangular holes 3 and 4 and a lateral width f equal to the lateral width e of the rectangular holes 3 and 4. Element pieces 1a, 2a
The copper plate 1 and the constantan plate 2 (see FIG. 1) having the same shape in which the square holes 5 and 6 forming the
(See (a) and (b)), and the copper plate 1 and the constantan plate 2 are laterally displaced by one of the square holes 3 and 4 so that the copper plate 1 and the constantan plate 2 are aligned in the square hole 3 of the copper plate 1. Square hole 6
, And the square holes 4 of the constantan plate 2 are positioned between the square holes 5 of the copper plate 1 and overlapped in the front and back (see FIGS. 2 to 4), and the upper edge 7a and the lower edge 8a thereof are arranged. A plate-shaped element body A is produced by integrally welding the copper plate 1 and the constantan plate 2 by welding by seam welding 9 or 10 (see FIG. 5).

Next, in the second step, the upper edge welded portion 7 and the lower edge welded portion 8 of the plate-shaped element body A produced in the first step described above.
The upper edge welded portion 7 is the left edge 3a of each square hole 3 of the copper plate 1.
The copper piece 1a and the upper connecting portion 7b of the constantan piece 2a are separated from each other, and the lower edge welded portion 8 is cut along the right side edge 3b of each square hole 3 of each copper plate 12
Connecting portion 8b at the bottom of the copper piece 1a and the constantan piece 2a
Are separated from each other, and an element connection body B in which the thermocouple elements C in which a number of copper pieces 1a and a constantan piece 2a of which the required electromotive force is generated are combined is formed (see FIG. 6).

Further, in the third step, each thermocouple element C of the element connecting body B produced in the second step is bent forward from the center fold 13 of the connecting portion 7b of the upper part thereof. The connecting portion 8b is bent backward from the center fold 14 (see FIG. 7), and a plurality of thermocouple elements C are laterally overlapped and integrated to generate a necessary electromotive force. A thermocouple integrated body TC having a cold junction portion b and a cold junction portion b is prepared (FIG. 19).
reference).

Second Embodiment (See FIGS. 8 to 13 and FIG. 19) As a combination of two different metal plates 1 and 2 constituting a thermocouple, for example, metal plates such as copper and constantan, chromel and constantan are used. In the first step, a horizontally elongated rectangular metal plate such as copper or chromel (hereinafter simply referred to as a copper plate in the description of the second embodiment) 1 which can be formed by the thermocouple elements C in which the necessary electromotive force is generated and a constantan A metal plate (hereinafter, simply referred to as a constantan plate in the description of the second embodiment) 2 and the like, cut from predetermined cutting lines 20 and 21 (see (a) and (b) of FIG. 8), and The destructible materials 22 and 23 are discarded, and the required number of element pieces, that is, the copper element board 24 of the same shape in which the copper pieces 1a and the constantan pieces 2a are formed at equal intervals, are replaced by the constantan element board 2
5 in the lateral direction (see (a) and (b) in FIG. 9), and these are arranged front and back to be overlapped (see FIG. 10), and the overlapping portion of the upper edge portion 7a and the lower edge portion 8a is overlapped. A plate-shaped element body A in which both element plates 24 and 25 are integrally polymerized is produced by welding by seam welding 9 or 10 (see FIG. 5). The element plate 2
4 and 25 are one copper plate 1 or constantan plate 2 to 2
Are produced (see (a) and (b) in FIG. 8).

Next, in the second step, the lower edge welded portion 8 of the plate element A produced in the first step is formed along the side edges 3a and 3b of the copper piece 1a and the constantan piece 2a.
That is, the element connection in which the thermocouple elements C in which the copper pieces 1a and the constantan pieces 2a are paired are connected by cutting 11 while leaving the lower connecting portion 8b between the copper piece 1a and the constantan piece 2a in series. A body B is created (see FIG. 12). In the above cutting process, the space between the connecting portions 8b between the copper piece 1a and the constantan piece 2a is cut off as a broken material 26.

Further, in the third step, the thermocouple elements C of the element connecting body B produced in the second step are alternately bent from the center of the upper connecting portion 7b and the lower connecting portion 8b. , The upper connecting portion 7b is bent forward from the fold 13 and the lower connecting portion 8b is bent backward from the fold 14 (see FIG. 13), and the copper piece 1a cut in the second step is used. A thermocouple integrated body TC having a small volume of hot junctions a and cold junctions b in which a required electromotive force is generated is formed by laterally superposing and integrating a plurality of couple elements C each including a pair of constantan pieces 2a ( See FIG. 19).

Third Embodiment (see FIGS. 14 to 18 and 19) As a combination of two different metal plates 1 and 2 constituting a thermocouple, for example, metal plates such as copper and constantan, chromel and constantan are used. In the first step, a horizontally elongated rectangular metal plate such as copper or chromel (hereinafter simply referred to as a copper plate in the description of the third embodiment) 1 that can be formed by the thermocouple elements C that generate the necessary electromotive force and a constantan A metal plate (hereinafter, simply referred to as a constantan plate in the description of the third embodiment) 2 and the like, cut from predetermined cutting lines 20 and 21 (see (a) and (b) of FIG. 14), and The breakable materials 22 and 23 are discarded, and a required number of element pieces, that is, a copper element plate 24 of the same shape in which the copper pieces 1a and the constantan pieces 2a are formed at equal intervals is replaced with a constantan element plate 25.
With respect to the copper element, it is inverted vertically (see (a) and (b) of FIG. 15), and these are arranged in the front and rear, and the copper piece 1a or the constantan piece 2a adjacent to each other is laterally shifted by one. The constantan piece 2a of the constantan element plate 25 is positioned in the space 27 between the plates 24.
The interval 28 of the element plate 25 made of constantan on the copper piece 1a of No. 4
Are overlapped with each other (see FIG. 16), and the overlapping portion of the upper edge portion 7a and the lower edge portion 8a is seam welded 9, 10 or the like.
To form a plate-shaped element body A in which both element plates 24 and 25 are integrally polymerized (see FIG. 17).

Next, in the second step, the upper edge welded portion 7 and the lower edge welded portion 8 of the plate-shaped element body A produced in the first step described above.
For example, the upper edge welded portion 7 is formed on each copper piece 1a of the copper plate 1.
11 is cut along the right side edge 3b of the copper piece 1a to separate the upper connecting portion 7b of the copper strip 1a from the constantan piece 2a, and the lower edge welded portion 8 is cut along the left side edge 3a of each copper piece 1a.
Connecting portion 8b at the bottom of the copper piece 1a and the constantan piece 2a
Are separated from each other, and an element coupling body B in which thermocouple elements C in which a number of copper pieces 1a and constantan pieces 2a that generate the required electromotive force are connected are formed (see FIG. 17).

Further, in the third step, each thermocouple element C of the element connecting body B produced in the second step is bent forward from the center fold 13 of the connecting portion 7b of the upper part thereof. The connecting portion 8b is bent backward from the center fold 14 (see FIG. 18), and a plurality of couple elements C are laterally overlapped and integrated to form a small volume hot junction a in which a necessary electromotive force is generated. A thermocouple integrated body TC having a cold junction b is prepared (see FIG. 19).

In the manufacturing process of the above-described embodiment, the square holes are punched and the element pieces are cut out in the first step, the upper edge and the lower edge are welded, the second step is cut, and the third step is bent. In addition, polymerization and integration processing, etc. will be automatically performed on an automatic production line in practice. 7, 13 and 19, 15 is a lead wire connected to both ends of the element assembly B, and FIG. 20 is an exploded view showing an assembled state of the thermocouple integrated body TC, and 16 , 17 are cover bodies for accommodating and holding the thermocouple integrated body TC.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and it is needless to say that the present invention can be implemented in various modes without departing from the scope of the present invention. is there.

[0033]

According to the method for manufacturing a series-type thermocouple of the present invention described above, the manufacturing steps from the first step of forming the plate-shaped element body to the third step of forming the thermocouple integrated body are simple, In addition, since it can be efficiently performed, it is possible to mass-produce uniform products in combination with being able to be automated by an automatic manufacturing line, so that a good-quality series thermocouple that generates high electromotive force can be obtained at low cost.

[Brief description of drawings]

FIG. 1 is a perspective view of two different metal plates of the first embodiment.

FIG. 2 is a perspective view showing a state in which two different kinds of metal plates are laterally displaced and superposed.

FIG. 3 is a partially cutaway front view of the same.

FIG. 4 is a cross-sectional plan view thereof.

FIG. 5 is a front view of the plate-shaped element body manufactured in the first step.

FIG. 6 is a front view of a state in which a cutting process is performed in a second step.

FIG. 7 is a perspective view showing a state in which the element connecting body that has been bent in the third step is slightly extended.

FIG. 8 is a front view showing a cutout state of two different metal plates used in the second embodiment.

FIG. 9 is a front view of two different metal plates that are cut out.

FIG. 10 is a front view showing a polymerization state in the first step.

FIG. 11 is a front view of the plate-shaped element body manufactured in the first step.

FIG. 12 is a front view of a state in which a cutting process is performed in a second step.

FIG. 13 is a perspective view showing a state in which the element connecting body that has been bent in the third step is slightly extended.

FIG. 14 is a front view showing a cut-out state of two different metal plates used in the third embodiment.

FIG. 15 is a front view of two different kinds of metal plates formed by cutting out.

FIG. 16 is a front view showing a polymerization state in the first step.

FIG. 17 is a front view of a state in which the cutting process is performed in the second step.

FIG. 18 is a perspective view showing a state in which the element connecting body that has been bent in the third step is slightly extended.

FIG. 19 is a front view showing an integrated processing state of a third step in the first to third examples.

FIG. 20 is an exploded front view showing an assembled state of the thermocouple integrated body to the cover body.

FIG. 21 is a front view of an array state of metal wire rods as an example of a conventional manufacturing method.

FIG. 22 is a front view of the connected state.

[Explanation of symbols]

 1 metal plate such as copper 2 metal plate such as constantan A plate-like element body B element connection body C thermocouple element TC thermocouple integrated body

Claims (3)

[Claims] 1. A first step of stacking two kinds of different metal plates forming a plurality of element pieces and welding an upper edge portion and a lower edge portion thereof to form a plate-shaped element body, and the plate-shaped element. A second step of cutting the welded portion of the body to form an element connection body in which a plurality of thermocouple elements each including two different element pieces are connected, and bending each thermocouple element of the element connection body. And a third step of polymerizing to form a thermocouple assembly, and a method for producing a series thermocouple. 2. Two different metal plates in which a plurality of square holes having the same width and a plurality of square holes forming a plurality of element pieces are cut out in parallel are shifted laterally by one square hole. On the plate-shaped element body, the first step of forming a plate-shaped element body in which two different metal plates are integrally polymerized by welding the upper edge portion and the lower edge portion by welding or the like. First, an edge-joined portion and a lower-edge welded portion are cut and separated along one side edge of each square hole to form an element connection body in which a plurality of thermocouple elements that form two different element pieces are connected. A second step, and a third step of forming a thermocouple integrated body by bending and superposing each thermocouple element of the above-mentioned element coupling body in an upside-down direction at an upper coupling portion and a lower coupling portion thereof. The method for manufacturing a series-type thermocouple according to claim 1. 3. Two kinds of different metal plates formed by cutting out a plurality of element pieces at the same interval are superposed by inverting one metal plate, and welding the upper edge portion and the lower edge portion thereof by welding or the like. A first step of welding to create a plate-shaped element body in which two different metal plates are integrally polymerized, and a welding portion of the plate-shaped element body is cut and separated along one side edge of each element piece. And a second step of forming an element connection body in which a plurality of thermocouple elements, each of which is a set of two different element pieces, are connected to each other, and the upper connection portion and the lower connection portion of each thermocouple element of the element connection body. 2. The method for producing a series-type thermocouple according to claim 1, further comprising: a third step of bending and polymerizing in opposite directions to form a thermocouple assembly.