JPS6155217B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing a coil used for a filament for a tube or the like.

[Conventional technology]

In general, coils used for filaments for tubes are wound around the outer circumferential surface of a core wire alternately and continuously with coil parts and skip-wound parts, and the skip-wound parts are cut and used as a filament. . In order to continuously form such a coil portion and a winding portion, the following method has conventionally been used.

That is, the core wire for winding and forming the coil portion is fed out from a nozzle, the coil wire is guided through a guide member that rotates around the nozzle, and the guide member is rotated around the core wire. Accordingly, the coil wire is wound around the core wire. At this time, the core wire is wound onto the winding drum by a winding drum that rotates at the same time as the rotation speed of the guide member, and the winding speed of the drum and the rotation speed of the guide member are controlled and defined. The coil part and the skipped winding part were formed at a pitch of .

[Problem that the invention seeks to solve]

However, in the above method, the core wire and the coil portion wound around the core wire slip on the winding drum, which not only causes pitch irregularities and scratches on the coil portion, but also causes the core wire to slip when wound on the winding drum. There is also the problem that the coil portion may be damaged due to the frictional force between the coil portion and the winding drum that occurs when the coil portion is taken off.

Further, the coil portion wound around the core wire in this manner has internal strain due to the winding, and such residual strain tends to cause breakage or the like when used as a filament. Therefore, in the past, the formed coil was heat-treated, that is, annealed to remove residual strain, but this annealing treatment was performed after the skipped winding section was cut to form a single filament. There is a problem in that the manufacturing process is increased because of the problem.

The present invention was developed based on the above circumstances, and it is possible to prevent scratches and uneven pitch from occurring in the coil portion wound around the core wire, and furthermore, it is possible to perform annealing treatment after forming the coil portion, thereby reducing the number of steps. The purpose of this invention is to provide a method for manufacturing a coil that can reduce the amount of noise.

[Means for solving problems]

The present invention is provided with a pair of chucks that alternately reciprocate in response to the rotation of a guide member that guides the coil wire, and in the process of gripping only the core wire with one of the chucks and feeding out the core wire from a nozzle. A coil element is wound around the core wire to form a coil part, and the rear end position of the coil part in the core wire around which this coil part is wound is gripped with the other chuck and this is fed out, so that the axial direction of the core wire is so as to form a skipped winding part along the
Further, when the pair of chucks simultaneously grip the core wires located at the front and rear ends of the coil portion, electricity is applied between the chucks to heat the coil portion and heat-treat the coil portion.

[Effect]

According to the method of the present invention, when the core wire is fed out from the nozzle, the core wire is gripped and pulled out by the alternating reciprocating motion of the pair of chucks. At the same time, while the core wire is being gripped, electricity is passed between these chucks to heat the coil portion, so that the annealing process can be performed immediately and the number of steps can be reduced.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In the figure, 1 is a rotating disk, and this rotating disk 1 is
It is rotatably attached to the fixed hollow shaft 3 and driven to rotate by, for example, a rotary drive machine (not shown). The rotating disk 1 is provided with guide rollers 4a and 4b facing each other on the periphery of the side surface on the bobbin 2 side via arms 1a and 1b, respectively.
As shown in FIG. 1, the bobbin 2 is rotatably attached to the fixed hollow shaft 3 adjacent to the rotary disk 1. Note that the bobbin 2 and the rotary disk 1 are rotated independently of each other. A coil wire 5 is laminated and wound around the bobbin 2 .

The hollow portion of the fixed hollow shaft 3 is a guide hole 7 for guiding the core wire 6, and a nozzle 8 is provided at the tip of the fixed hollow shaft 3. Therefore, the core wire 6 is fed out from this nozzle 8.

In front of the nozzle 8 is a pair of chucks 9.
a, 9b are arranged. That is, as shown in FIG. 1, one chuck 9a is connected to the core wire 6.
The other chuck 9b is located near and above the nozzle 8, avoiding the moving path of the chuck 9a. These chucks 9a, 9b
has the function of gripping only the core wire 6, and is reciprocated alternately on and above the core wire 6 in synchronization with the rotation speed of the rotating disk 1. In other words, being synchronized with the rotational speed means that the chucks 9a and 9b are synchronized with the core wire 6, respectively, corresponding to the rotational speed when the rotating disk 1 is rotating or the time when it is stopped (the rotational speed is 0). It is to grasp the object and move it back and forth alternately at a constant speed.

10 is a cylindrical guide pin, for example;
This guide pin 10 prevents the coil wire 5 from separating from the guide roller 4a.
This guide pin 10 is arranged below the core wire 6 on the front side of the tip of the nozzle 8.

Further, a forming knife 11 is arranged below the guide pin 10. The forming knife 11 guides the coil wire 5 near the core wire 6 when the coil wire 5 starts being wound around the core wire 6.

Regarding the method of manufacturing a coil using the apparatus configured in this way, Fig. 2 a, b, c, d,
This will be explained by adding e, f, and g.

First, as shown in FIG. 1, a rotary disk 1 is rotationally driven by a rotary drive machine (not shown) or the like. In synchronization with the rotational speed of the rotary disk 1, one chuck 9a grips only the core wire 6 in front of the nozzle 8, and moves at a constant speed in the direction of the arrow shown in FIG. It is continuously pulled out from the nozzle 8. Due to the rotation of the rotating disk 1 and the linear movement of the chuck 9a, the coil wire 5, which is continuously guided from the bobbin 2 to the outer peripheral surface of the core wire 6 at the tip of the nozzle 8 via the guide roller 4a, is As shown in the figure, it is wound around the outer peripheral surface of the core wire 6 at a constant pitch to form a coil portion 12.

Next, FIG. 2a shows a state in which the coil wire 5 is further wound around the core wire 6 than in the state shown in FIG. 1, and one coil portion 12 is formed. That is, at this time, the rotation of the rotating disk 1 is stopped, and the guide roller 4a is positioned below the nozzle 8. Next, in a state where the rotation of the rotary disk 1 has stopped, the chuck 9 is activated in synchronization with this rotation stop.
a is moved at a constant speed in the direction of the arrow while gripping only the core wire 6. Therefore, the core wire 6 is pulled out from the nozzle 8 by the thickness of the chuck 9b that allows the chuck 9b to grip the core wire 6, and accordingly, the coil wire 5 is also pulled out from the bobbin 2 by the thickness of the chuck 9b that allows the chuck 9b to grip the core wire 6. It is rolled out according to the thickness.

After this, the chuck 9b moves downward and the second
As shown in FIG. b, only the core wire 6 is held on the front side of the nozzle 8. Next, in order to form the skip winding part 13 which becomes the foot part of the coil part 12, these chucks 9a and 9b are assembled in the state shown in FIG. 2b above.
is further moved in the direction of the arrow at the constant speed.

Therefore, as shown in FIG. 2c, the core wire 6 is further fed out from the nozzle 8 by the length of the skip winding section 13, and accordingly, the skip winding section is also unwound from the bobbin 2. The coil wire 5 is let out by a length of 13. Further, the coil wire 5 is held by a guide pin 10 shown in FIG. 2c, and is prevented from coming off the guide roller 4a.

At this time, the coil portion 12 is heated in a forming gas atmosphere by applying a voltage between the chucks 9a and 9b by the power supply 14 as shown in FIG. be done.

Next, as shown in FIG. 2d, one chuck 9a is opened, moves above the core wire 6, and returns to the vicinity and above the nozzle 8 as shown by the arrow. Furthermore, when the chuck 9a is located near and above the nozzle 8, it moves downward and grips only the core wire 6 in front of the nozzle 8, as shown in FIG. 2e.

Next, in order to wind the coil wire 5 around the outer peripheral surface of the core wire 6 again, the forming knife 11 is moved upward, as shown in FIG. 2 f, to bring the coil wire 5 closer to the core wire 6. .

Thereafter, the rotating disk 1 is driven to rotate again, and the chuck 9a is moved at a constant speed in the direction of the arrow shown in FIG. 2g again in synchronization with the rotation speed of the rotating disk 1. The coil wire 5 begins to be wound around the outer peripheral surface of the core wire 6 again.

Note that when the rotating disk 1 is rotated several times,
The chuck 9b is opened and returned to its original position, and the forming knife 11 is similarly moved downward and returned to its original position, resulting in the state shown in FIG.

Therefore, by repeating the above-described operations, the coil portion 12, the skipped winding portion 13, and the outer circumferential surface of the core wire 6 are formed one after another.
Thereafter, the core wire 6 is removed from the coil parts 12, 12, . . . and the skip winding part 3 is cut to form one completed coil product.

In this way, in the above embodiment, when the coil wire 5 is wound around the core wire 6, the chuck 9a,
During each of these operations, the coil portion 9b grips only the core wire 6 without slipping or the like, so that the coil portion 12 is not damaged.
Furthermore, even when the chucks 9a and 9b are moved at a constant speed in synchronization with the rotational speed of the rotating disk 1,
When the core wire 6 is gripped by these chucks 9a and 9b, no slipping occurs between them, and a coil portion 12 with high pitch accuracy can be obtained. and,
This coil portion 12 is heated and heat-treated while being wound around the core wire 6, thereby eliminating distortion during the forming process, improving the accuracy of the overall length of the coil, and creating a straight winding portion 13. This has the advantage that post-processes such as stretching the legs of the winding section 13 can be reduced.

In addition, after forming the skip winding portion 13 and before starting the next coil forming process, conventionally, the core wire 6 and the coil wire 5 are held in place by being held between a pair of claws from above and below on the front side of the nozzle 8. Because I was
These claws may cause scratches on the skip winding section 13, which is the foot section of the coil section 12, but in the above embodiment, the forming knife 11 holds the coil wire 5 from below. , the above-mentioned skip winding portion 13 will not be damaged.

Note that the rotating disk 1 and the fixed hollow shaft 3 are fixed,
It goes without saying that the same effect can be obtained even if these are rotated integrally.

〔Effect of the invention〕

As described above, according to the present invention, the core wire is drawn out from the nozzle while being gripped by a pair of chucks that alternately reciprocate, so that the core wire can be drawn out using a conventional winding drum. Compared to the case where the coil part is fed out, there is no problem of irregular pitch or scratches on the coil part, and a coil part with a constant pitch and without scratches can be obtained. Moreover, since the pair of chucks are energized to heat the coil part at the stage when the coil part is formed on the core wire, there is no need for special annealing treatment later, and the number of steps can be reduced.

[Brief explanation of the drawing]

The drawings illustrate one embodiment of the invention,
FIG. 1 is an explanatory view showing the middle of the coil manufacturing process, and FIGS. 2a, b, c, d, e, f, and g are explanatory views showing the above coil manufacturing process in order. 1... Rotating disk, 4a... Guide roller, 5...
... Coil wire, 6 ... Core wire, 9a, 9b ... Chack, 12 ... Coil part, 13 ... Skipping winding part.

Claims (1)

[Claims] 1. A method of manufacturing a coil by winding a core wire fed out from a nozzle with a coil wire guided by a guide member rotating around the nozzle, in which a pair of coil wires guided by a guide member that rotates around the nozzle is wound around the core wire, which reciprocates alternately in response to the rotation of the guide member. A chuck is provided, and in the process of gripping only the core wire with one chuck and feeding out the core wire from the nozzle, a coil element is wound around the core wire to form a coil part, and the core wire around which this coil part is wound is By gripping the rear end position of the coil part with the other chuck and letting it out, a skip winding part of the coil wire is formed along the axial direction of the core wire, and the pair of chucks A method for manufacturing a coil, characterized in that, while the core wires located at the front and rear ends are held simultaneously, the coil portion is heated and heat-treated by applying electricity between a pair of chucks.