JPH0228908A - Treatment of strand at end part of coil winding - Google Patents

Abstract

PURPOSE:To eliminate the disconnection of a twisted wire due to engagement with the nozzle or the like of a winding machine by combining a both-end twisting step of twisting both ends of a loop formed at an end and a center twisting step of twisting the center except both end, and increasing the number of twistings of the both end twisting step more than that of the center twisting step. CONSTITUTION:A both-end twisting step of twisting both ends of a loop R between a stationary pin 7a and a turning pin 8 and between a turning pin 10 and a stationary pin 7b by simultaneously turning the turning pins 8, 9, 10 is conducted, and then only the central pin 9 is turned to conduct a center twisting step for twisting both side turning pins 8 and 01 therebetween. The number of twistings of the both end twisting step is more than that of the center twisting step. When pins 7a-10a are retracted and removed, the finely twisted parts 21, 21 of the twisted ring 21a are formed at both ends to be shorter than the length l of twisting rings 22, 22 of both ends, a twisted part 23 is formed at the center, and the twisted wire 23a is twisted more than the twisted wires 21a of both ends 21, 21.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention is directed to forming a loop at the end of a coil winding wound around a coil bobbin, and twisting the end of the coil winding to twist the loop. It is about the method.

``Prior art J When the coil winding is a thin wire, in order to improve the mechanical strength of the terminal part of the coil winding a that is tied to the connection terminal of the coil bobbin, a loop r is formed at the terminal part. A stranding process is applied to twist the strands.The conventional stranding process
As shown in the figure, the coil winding a is passed around the fixed bins b and b at both ends to form a loop r, and the rotating bin C provided between the fixed bins b and b is moved in the direction of the arrow in the figure. This is done by turning and twisting, thereby forming twisted wire portions d having a constant number of twists as shown in FIG. 7, and forming twisted rings e at both ends.

"Problem to be Solved by the Invention" However, it is not easy to set the appropriate number of twists, and if the number of twists is too large, the strain produced in the coil winding will increase proportionally, and it will be difficult to tie the connection terminals. , the strength will decrease due to distortion in the manufacturing process due to soldering work, etc. On the other hand, if it is too small, the length 2 of the twisted ring e in the part hanging on the fixing bins b and b will become longer and the winding machine will become weaker. There was a problem that the wire could get caught in the nozzle or the like and cause the wire to break, which was an issue that needed to be solved.

The present invention has been made to solve the above problems,
The object of the present invention is to provide a method for twisting a terminal portion of a coil winding, which does not cause a decrease in strength and also does not cause the twist ring to become large and get caught in the nozzle of a winding machine and break the wire. .

"Means for Solving the Problem" A specific means for achieving the above object is to form a loop at the end of the coil winding wound around the coil bobbin, and to twist the loop at the end of the coil winding. In the stranded wire processing method, a both end stranded wire processing step in which both ends of a loop formed at the terminal portion are twisted, and a center portion stranded wire processing step in which the central portion other than both ends are twisted are combined. The present invention is characterized in that the number of twists in the stranding process is greater than the number of twists in the center stranding process.

"Operation" According to the above-mentioned specific means, the twisted loops are reduced by the both ends twisting process in which the number of twists is large for the loop formed at the end of the coil winding, and the center part twisting process in which the number of twists is small. As a result, the strain on the part connected to the connecting terminal is reduced and strength does not deteriorate.

"Example" An example of the present invention will be described based on FIGS. 1 to 5 of the accompanying drawings.

15A is a schematic diagram showing the entire winding work of the coil winding 1. FIG.

The coil winding 1 is unwound from the winding frame 2, guided by guide rollers 3, and led to a twisting device 4.

The twisted wire processing device 4 forms an inlet 5 and an outlet nozzle 6 for the coil winding 1, and provides two fixing pins 7a and 7b between them, and three strands arranged at approximately equal intervals between the fixing pins 7a and 7b. A real pivot pin 8,9.10 is provided. The coil winding 1 introduced from the inlet 5 is passed through the fixing pin 7a on the outlet nozzle 6 side, returned to the inlet 05 side, and hung around the fixing pin 7b to form a loop R, and then passed through the outlet nozzle 6. The winding processing device 11 is then guided to the next winding processing device 11.

The winding device 11 is provided with a rotating nozzle 14 which forms an introduction nozzle 12 and supplies the coil winding 1 introduced from the nozzle 12 to a coil bobbin 13 which is fixedly attached and wound. One end of the coil winding 1 supplied from the turning nozzle 14 is held by the terminal holding part 15, and winding of the coil winding 1 is started by turning of the turning nozzle 14.

Further, the coil bobbin 13 and the rotating nozzle 14 have their respective axes X coincident with each other, causing the coil bobbin 13 to reciprocate in the direction of the axis X in harmony with the rotating speed of the rotating nozzle 14, thereby providing uniform winding.

Next, the operation of the twisted wire processing device 4 will be explained.

The coil bobbin 1 is wound a predetermined number of times by the rotating nozzle 14.
3, the rotating nozzle 14 is stopped and the stranding processing device M
A twisting process is performed on the loop R of the coil winding 1, which is formed by being passed over the fixing pins 7a and 7b of No. 4.

First, by simultaneously pivoting the pivot pins 8.9.10, the space between the fixed pin 7a and the pivot pin 8 and the pivot pin 10 are
A both-end twisting process is performed in which both ends of the loop R between the fixed pin 7b and the fixed pin 7b are twisted, and then the turning pins 8 and 10 are fixed and only the central turning pin 9 is turned. The number of twists in both processes is such that the number of twists in the both ends stranding process is higher than that in the center stranding process. After the process of increasing the number of twists is completed, each of the bins 7a to 10 is retreated and removed, and as shown in FIG. Part 21
．． 21 is formed at both ends, the length l of the twisted rings 22, 22 at both ends is also shortened, and the twisted wire part 23 is formed in the central part where the number of twists is small, and the twisted ring 23a in that part is formed at both ends 21.21. The twisted wires are processed to be larger than the twisted ring 21a.

Incidentally, the order of each of the above-mentioned steps does not matter which one is performed first.

The stranded coil winding 1 passes through the lead-out nozzle 6 and the introduction nozzle 12 by the rotation of the rotating nozzle 14,
The wire is supplied to the coil bobbin 13, the twisted wire portion 21 is wound several times, and the length of the end portion of the coil winding a1 is adjusted so that the twisted wire portion 23 is reliably tangled at the terminal portion of the coil bobbin 13.

In addition, in the wire stranding device 4, each pin 7a is
10 returns from the retracted position, the coil winding 1 is passed around the fixing pins 7a and 7b, and a loop R is automatically formed.

When winding is performed continuously, if the wire is cut at the center cutting portion 24 of the stranded wire portion 23, the first half becomes the terminal end at the end of winding, and the second half becomes the end end at the beginning of winding. The cut ends of the twisted wire portions 23 at the terminal portions of the winding processing device 11
The twisted wire portion 21 starts winding around the coil bobbin 13 by turning the turning nozzle 14 . The coil bobbin 13 is made of resin, and has a pair of connection terminals 32 on one flange 31 as shown in FIG.
．． 32 is implanted by integral molding, one end protrudes from the side end surface of the flange to serve as an external connection terminal 33.33, and the other end 34
．． 34, the stranded wire portion 23 at the winding start side end portion and the stranded wire portion 23 at the winding end side end portion of the coil winding 1 are twisted and connected by soldering or the like in a subsequent manufacturing process.

The above-described stranding process was applied to two types of urethane-coated copper wires with wire diameters of 0 and 11, and the relationship between the number of twists and the length p of the twisted rings 22 at both ends of the stranded wire portion is shown in Figure 4. Figure 5 shows the relationship between the residual elongation rate.

According to FIG. 4, as the number of twists increases, the length l of the twisted ring 22 becomes shorter, and according to FIG. 5, it can be seen that as the number of twists increases, the elongation retention rate of the copper wire decreases.

"Effects of the Invention" As clarified in the description of the above-mentioned specific means and effects, the present invention provides a both-end twisting process of twisting both ends of a loop formed at the end of a coil winding; By combining this process with the center part stranding process in which the central part of the wire is twisted, the number of twists in the both end part stranding process is greater than the number of twists in the center part stranding process. It is possible to increase the number of twists in the part where almost no distortion occurs and shorten the length of the twisted ring at the end, so it will not get caught in the passing lead-in/introduction nozzle and cause breakage, and the coil bobbin The parts that are subject to distortion such as bending because they are connected to the terminals of
Since the number of twists is reduced, it is possible to prevent a decrease in strength due to bending and disconnection during tying work or soldering work in subsequent processes.

13, Coil bobbin, 14, , Rotating nozzle, 21.23. ,, fi line part 1 , twisted ring.

21a, 22. 23a.

[Brief explanation of the drawing]

The accompanying drawings show an embodiment of the present invention, and FIG. 1 is a schematic diagram showing the entire winding operation of the coil winding 1, FIG. The figure shows coil bobbin 1
Fig. 4 is a graph showing the relationship between the number of twists and the length 2 of the twisting ring 22, and Fig. 5 is a graph showing the relationship between the number of twists and the length 2 of the twisting ring 22. FIG. 6 is an enlarged view of a conventional stranded wire processing device, and FIG. 7 is an explanatory diagram illustrating stranded wire processing using the conventional device. 111. coil winding, 410. Twisted wire processing equipment, 6°0. Derivation nozzle, 7a, 7b,, fixing pin, 8°9.10. ,,Swivel pin, 11,,,Winding processing equipment,Figure Figure Number of twists (crest 15m+*) Number of twists (crest/'5sm) Figure

Claims (1)

[Scope of Claims] A method for twisting a coil winding end, in which a loop is formed at the end of a coil winding wound around a coil bobbin, and the loop is twisted, including both ends of the loop formed at the end. The number of twists in the both ends stranding process is the same as the number of twists in the center stranding process. A method for stranding a coil winding terminal, characterized in that the number of twists is greater than the number of twists.