JPS58100918A - Manufacturing device for bent heat exchanger - Google Patents

Abstract

PURPOSE:To prevent deformation and destruction of fins at the outside of the pipe by arranging plural beads to obtain desired bending and after inserting them into the pipe drawing only the wire. CONSTITUTION:A heat exchanger 1 is set on a base 14 and clamped with a keep plate 15. A flexible wire 7 on which beads 9, 10 are mounted is inserted into the pipe 5 of the heat exchanger 1 from a check piece 8 for preventing falling off until bending position of the heat exchanger 1 coincides with angled position of beads. Under this condition, the check piece 8 for preventing falling off attached on an end of the wire 7 is chucked with a wire pulling head 17 on the opposite end, and a bead holding head 16 connected with beads 9, 10 by a leaf spring is fixed. When the wire head 17 is pulled, plural beads come into contact with each other to form desired radius R, and the pipe 5 of the heat exchanger 1 is bent.

Description

[Detailed description of the invention] The present invention relates to an apparatus for manufacturing a bending heat exchanger.

Conventionally, when manufacturing a bending heat exchanger 1 as shown in FIG. 1, a bending method using a tangent bender as shown in FIG. 2 has been used. As for the bending work, the heat exchanger 1 is first set on the base 2, clamped by the bending piece 3, and the wings 4 are rotated around the It center of the bending piece 6 as the rotation center to obtain the desired bend 1718. be. However, in recent years, with the emphasis on energy saving and resource saving, the walls of both the fins 6 and the pipe 5 have become thinner, and in bending work using the one-type tangent bender, the bending moment of the pipe is received by the rough-in 6, so the portion corresponding to the bending piece 3 is Hui/
There was a problem that 6 was crushed.

According to such a bending method, the reduction in the thickness of the fin 6 is restricted, which becomes an obstacle to the above-mentioned energy saving and resource saving.

The present invention has been made in an attempt to eliminate such deficiencies.

That is, one end of the bendable wire 7 is fitted with a stopper 8 to prevent it from being pulled out, and from the other end, a plurality of beads 9 with parallel surfaces and an angle 11 that equally divides the bend 1-ti8 of the heat exchanger 1 are attached. Arrange a plurality of beads 10 having a desired bending angle 1t18, insert the bending jig 19 inserted into the wire 7 into each pipe 5 of the heat exchanger 1, and insert the beads 9.10 into the pipes 5 of the heat exchanger 1. In a bending method in which the beads 9 and 10 are brought into contact with each other by pulling only the bendable wire 7 after being positioned at a predetermined position to obtain the desired bend 1 (, 18), the beads 9 and 10 can pass through the bending part. This is an apparatus for manufacturing a bending heat exchanger using a bead method, characterized in that the beads 9 and 10i are connected to each other in order to be drawn out from the inside of the pipe 5 of the bending heat exchanger 1.

An embodiment of the present invention will be described below with reference to FIGS. 3 to 8. In the figures, parts that are the same as those in the prior art are designated by the same reference numerals. 7 is a bendable wire with a stopper 8 attached to one end to prevent it from being pulled out, a beads 9 with parallel surfaces on the straight part of the heat exchanger from the other end, and a bending part of the heat exchanger 1 on the bent part. A bending jig 19 is made by arbitrarily arranging beads 10 each having an angle 11 obtained by dividing a 1t18 portion into a desired bending angle 1t18. Also, the beads 9゜1 after bending the heat exchanger.
In order to pull out 0 from inside the pipe 5, use the beads 9.10.
For each connection, a leaf spring 12 that can be bent back is attached with a fixing pin 16 so that it is perpendicular to the bending direction, which also serves to regulate the direction of the beads 10 and to ensure that the bendable wire 7 is always in a straight line. It is made to stretch.

First, the heat exchanger 1 is set on the base 14 and clamped by the presser plate 15 to position the heat exchanger 1. After that, from the side of the stopper 8 that prevents the bendable wire 7 attached to the beads 9.10i from being pulled out in the pipe 5 of the heat exchanger 1, the bending position of the heat exchanger 1 and the position of the beads having an angle match. Insert it to the desired position. In this state, the stopper 8 attached to one end of the wire 7 to prevent pulling out and the wire tensioning head 17 attached to the opposite side are chucked, and the beads 9 and 10 are connected to the beads presser head 1 by the plate spring 12.
After fixing 6, when the wire head 17 is pulled,
A plurality of beads come into contact with each other to completely form a desired bend, thereby making it possible to bend the pipe 5 of the heat exchanger 1. After bending the pipes of the heat exchanger, the bead presser head 16 is pulled and a plurality of beads connected by the plate springs 12 can be taken out from the heat exchanger, regardless of the wire 7. The diameter, length, shape, etc. of the beads may be determined under conditions that allow the beads to be removed from the pipe after bending the heat exchanger. In addition, the method of connecting the beads should be such that it is easy to return to a straight line after bending, and it is possible to control the direction of the beads, and if the method can withstand the tensile force when pulling out the beads after bending the heat exchanger, it can be inserted into the heat exchanger. can not use.

Further, the bending accuracy and bending speed can be improved by adding the bending pieces and wings used in the conventional tangent pender type to the bending method of the present invention.

According to this bending method using beads 9.10, it is possible to bend (1-t i 8) regardless of the wall thickness of the fin O.The bending equipment is also simple and the manufacturing cost can be reduced. A large amount of cost reduction can be achieved.

Furthermore, since the bending work can be done easily, there is no reduction in work efficiency.

According to the present invention, since the heat exchanger is bent by applying bending force only to the pipes, the fins attached to the outside of the pipes are not deformed or crushed, and the fin plate thickness can be reduced.

In addition, in the case of a heat exchanger for an air conditioner, if fin collapse occurs at the bent part, this creates a large ventilation resistance and makes it impossible to obtain the desired heat exchanger performance, but with the method of the present invention, fin collapse does not occur. Good heat exchanger performance can be obtained.

Furthermore, in the past, bending pieces, wings, etc. were prepared according to the bending dimensions of the heat exchanger, and when changing the bending dimensions, a large amount of setup time was required to replace them, but with the method of the present invention, Since only the beads need to be replaced and the production equipment is non-pull, it is possible to bend heat exchangers at low cost. It is also possible to bend at multiple consecutive locations.

[Brief explanation of the drawing]

Figure 1 is an external view of a bending heat exchanger, Figure 2 is a cross-sectional view of a conventional tangent bender with one type of bending, Figure 6 is an external view of a rosary with parallel surfaces, and Figure 4 is an external view of a rosary with an angle. Figure 5 is a bent cross-sectional view of a heat exchanger using the bead method, Figure 6 is a cross-sectional view with angled beads inserted into the heat exchanger pipe, and Figure 7 is a cross-sectional view of the heat exchanger bent. , FIG. 8 is a cross-sectional view of beads connected by a plate spring. DESCRIPTION OF SYMBOLS 1...Bending heat exchanger, 2...Base, 6...Bending piece, 4...Wing, 5...Pipe, 6...Fin, 7...Wire, 8... Stopper, 9... Beads with parallel surfaces, 10... Beads with angles, 1
1... Angle θ, 12... Leaf spring, 16... Stopping pin, 14... Base, 15... Presser plate, 16... Bead presser head, 17... Wire tension head, 1
8... Heat exchanger bending It, 19... Bending jig.

Claims (1)

[Scope of Claims] 1. A stopper (8) to prevent beads from being pulled out is attached to one end of the bendable wire (7), and a plurality of wires having a parallel surface in contact with adjacent beads from the other end are attached. A bending jig (19) formed by inserting a rosary bead (9) and a plurality of rosary beads (10) having an angle If equally dividing the desired bending I (, (18) part) into a wire (7). After inserting into the pipe (5) of the heat exchanger to the specified position, fix the end of the beads protruding from the pipe (5) of the bending jig (19) and press the beads into contact. A device for manufacturing a bending heat exchanger, characterized in that the heat exchanger is bent by pulling the wire (7) until the surfaces abut. 2. The beads of the bending jig (19) are within the range that can pass through the pipe at the bending part. The size of the plate spring (12) is connected to the adjacent rosary beads in the direction of bending.