JPH11169983A - Coiling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coiling machine capable of easily exchanging a mandrel. SOLUTION: The coiling machine 10 is provided with a mandrel driving head 11 and a mandrel unit 15. The mandrel unit 15 is provided with a mandrel holder 31 rotatable around a rotating shaft 30 in the horizontal direction as the center and plural mandrels 14a, 14b fit into the mandrel holder 31. the mandrel unit 15 is turned with a switching mechanism 35, and either one of respective mandrels 14a, 14b is allowed to selectively oppose the mandrel driving head 11. The mandrel unit 15 is allowed to transfer with a mandrel transfer mechanism 16, and the mandrel 14a which exists in a position opposing the mandrel driving head 11 is allowed to insert into or remove from the mandrel driving head 11. The position of the mandrel holder 31 in the mandrel unit 15 is switched with a switching mechanism 35 at the time of exchanging mandrels 14a, 14b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coiling machine for winding and forming a coil spring such as a suspension spring for a vehicle.

[0002]

2. Description of the Related Art In a coiling machine for forming a coil spring by using a core, a core (mandrel) having an outer diameter corresponding to the diameter of the coil spring to be formed is used. One end of the metal core is fitted to the metal core driving head, and the other end of the metal core is supported by a terminal support member. A core spring is rotated by a motor or the like, and a spring wire is continuously wound around the surface (outer peripheral surface) of the core to form a coil spring.

[0003] Therefore, this kind of coiling machine needs to be appropriately replaced according to the diameter of the coil spring to be formed. Also, when the surface of the metal core is worn, damaged or deformed, it is necessary to replace the metal core. Particularly, in a hot-formed coil spring, a wire heated to a high temperature comes into contact with the surface of the core metal, so that thermal expansion and deformation of the core metal are likely to occur, and the core metal needs to be replaced.

Conventionally, a plurality of metal cores are stored in a metal core storage shelf or the like in a factory in preparation for core metal replacement, and when replacement is required, an operator installs transfer equipment such as a chain block or a forklift. To remove the desired core from the shelf.

[0005]

Conventionally, in order to replace a metal core, a metal core used up to that time is removed from a metal core drive head and a terminal support member, while a new metal core removed from a metal core storage shelf is removed. An operator moves the core metal to a coiling machine using a chain block or the like, and exchanges the core metal, but this is an operation requiring labor. In particular, a core metal for a coil spring having a large wire diameter, such as a suspension spring for a vehicle, is not only large and heavy, but also a hot-formed coil spring has a high core metal temperature. It was also a difficult and dangerous operation. Accordingly, it is an object of the present invention to provide a coiling machine capable of easily and safely exchanging a cored bar.

[0006]

According to a first aspect of the present invention, there is provided a metal core rotating head having a metal core driving head and a driving source for rotating the metal core driving head. A metal core unit having a metal core holder capable of rotatably supporting a plurality of metal cores for forming a coil spring and moving each metal core to a position opposed to the metal core drive head, A switching mechanism for moving the metal core holder such that a desired metal core among the metal cores faces the metal core driving head; a first position at which the metal core fits with the metal core driving head; A core metal moving mechanism for moving the metal core unit in the axial direction of the metal core or the like over a second position where the metal core is separated from the metal core drive head.

One example of the core holder is a rotary holder rotatable about a rotation axis. A plurality of cores are arranged on the same radius around the rotation axis, and the core holder is rotated. By doing so, the core metal is switched. Further, among the plurality of cores provided in the core holder, at least two cores may have different diameters.

[0008] In the coiling machine of the present invention, the cored bar unit is at the first position during the coil spring forming, and the end of the cored bar is fitted to the cored bar driving head. When it becomes necessary to replace the metal core, the metal core unit is moved back to the second position by the metal core moving mechanism, so that the metal core used so far is separated from the metal core drive head. Further, by moving the cored bar holder by the switching mechanism, the previously used cored bar is displaced to the retracted position, and a new cored bar is opposed to the front of the cored bar driving head. After that, the core metal unit is advanced to the first position by the core metal moving mechanism, so that a new metal core is fitted to the metal core drive head. Thus, the replacement of the core is completed easily and in a short time.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. The coiling machine 10 shown in FIG. 1 includes a core rotating mechanism 12 having a core driving head 11 and a wire guide 13 for guiding a spring wire W.
A metal core unit 15 having two or more metal cores 14,
A core metal moving mechanism 16 and the like are provided.

The metal core rotating mechanism 12 includes a metal core driving head 11.
And a motor 21 functioning as a driving source for rotating the cored bar driving head 11. The rotation of the motor 21 is reduced by a speed reduction mechanism built in the device main unit 20 to drive the cored bar. The information is transmitted to the head 11.

A chuck 22 is provided on the core driving head 11. The chuck 22 grips the end W1 of the wire W of the coil spring to be formed. The strand W is
Through the element wire guide 13, it is supplied in the tangential direction of the metal core 14 from the near side of the paper surface in FIG.

The wire guide 13 is provided in the vicinity of the metal core 14 and moves in the axial direction of the metal core 14 (in the direction indicated by the arrow F) at a speed related to the rotational peripheral speed of the metal core 14. ing. Therefore, the coil spring C having a desired pitch is formed by winding the wire W around the outer peripheral surface of the cored bar 14 while being guided by the wire guide 13.

The metal core unit 15 includes a rotary holder 31 rotatable about a rotary shaft 30 extending in the horizontal direction. Each of a plurality of bearings 32 provided on the metal core holder 31 has a core. One end 33 of the gold 14 is rotatably supported. The plurality of metal cores 14 are provided in parallel on the same radius centered on the rotation shaft 30 so as to be substantially parallel to each other. Although the illustrated example shows the case where the number of the cored bars 14 is two, three or more cored bars may be arranged in parallel on the same radius around the rotation shaft 30.

The cored bar holder 31 is rotated about a rotating shaft 30 by a switching mechanism 35 having an actuator such as a motor, so that one of the cored bars 14 faces the cored bar driving head 11. It is configured to be able to.
The other end 36 of the cored bar 14 has a shape that can be fitted to the cored bar drive head 11 and can be detached from the cored bar drive head 11. In the fitted state, the cored bar 14 rotates integrally with the cored bar drive head 11.

As shown in the drawing, two cores 14a, 14b
Is provided at a 180 ° rotationally symmetric position about the rotation axis 30 of the cored bar holder 31, the switching mechanism 35 is configured to invert the cored bar holder 31 by 180 ° when the cored bar is replaced. In order to prevent the cored bars 14a and 14b from rotating by inertia or the like when the cored bar holder 31 rotates, a braking member such as a disc spring may be provided on the bearing 32 or the like.

The core metal unit 15 can be reciprocated in the direction of arrow M in FIG. The core metal moving mechanism 16 moves the guide member 40 in the axial direction of the guide member 40, the movable base 41 movable in the horizontal direction along the guide member 40, and the movable base 41 that moves in the axial direction of the guide member 40. A reciprocating actuator 42 such as a pneumatic cylinder or a ball screw mechanism is provided.

The movable base 41 is moved by the reciprocating actuator 42 to a first position (forward position) shown in FIG.
And a second position (retracted position) shown in FIG. When the movable base 41 advances to the first position, the end 36 of the metal core 14 (14a) facing the metal core drive head 11 is fitted to the metal core drive head 11, and the movable base 41 is moved to the second position. , The end 36 of the cored bar 14 (14a) is
1 away from it.

FIG. 1 shows a case where the coil spring C is formed by using the first core metal 14a among the plurality of metal cores 14. The spring wire W is held at its end W1 by a chuck 22, is driven to rotate in the direction of arrow R by a motor 21, and the wire guide 13 is moved in the axial direction of the cored bar 14a (direction indicated by arrow F). By moving at a speed, the element wire W is wound around the outer periphery of the cored bar 14a at a predetermined pitch.

When the coil spring C reaches a predetermined number of turns, the reciprocating actuator 42 moves the core 14a away from the core driving head 11 as shown in FIG. C is taken out from the cored bar 14a.

When it becomes necessary to replace the first metal core 14a with the second metal core 14b, the core metal unit 15 is moved backward to the second position by the reciprocating actuator 42 of the metal core moving mechanism 16. . No. 1 used until then
Is separated from the core driving head 11. Further, by rotating the cored bar holder 31 by the switching mechanism 35, the first cored bar 14 a is moved to the retracted position beside the cored bar driving head 11, and the second cored bar 1 is moved.
4b is opposed to the front of the metal core driving head 11.

After that, the core unit 15 is advanced to the first position by the reciprocating actuator 42, so that the end 36 of the second core 14 b is fitted to the core driving head 11. By the above operation, the core metals 14a, 1
4b can be replaced easily and in a short time.

The core metal 14 provided in the core metal unit 15
The number is not limited to two shown in the illustrated example, and three or more metal cores may be held in parallel with each other.
Alternatively, as shown in FIG. 3, the cores 4 may not be parallel to each other. These cores may have the same diameter as each other, or two or more cores having different diameters may be provided. Further, a core metal for forming a conical coil spring, a barrel coil spring, or the like may be used.

In carrying out the present invention, the form of each component, such as the core metal rotating mechanism, the core metal unit, the switching mechanism, the core metal moving mechanism, etc., constituting the present invention is appropriately modified and implemented. It goes without saying that you can do it. The cored bar holder is not limited to the rotary type as in the above-described embodiment, and for example, is configured to be able to reciprocate linearly,
The switching operation of the cored bar holder may be performed by a linearly movable actuator such as a cylinder mechanism. Further, the present invention is not limited to suspension springs, but can be used for forming various coil springs, and can be applied to cold-formed coil springs including hot-formed coil springs.

[0024]

According to the first aspect of the present invention, the replacement of the metal core can be easily performed in a short time, and the operator does not touch the metal core during the replacement work. In the case of a molded coil spring, it can be safely replaced. As described in the second aspect, if a rotary core holder is provided, the configuration and operation of the core holder and the switching mechanism can be simple, and the configuration and operation can be simplified. it can.

According to the third aspect of the present invention, by providing a plurality of metal cores having different diameters in the metal core unit, springs having different coil diameters can be formed. If a plurality of metal cores having the same diameter are provided in the metal core unit, the metal core can be quickly replaced when the metal core during hot coiling needs to be replaced due to thermal expansion or the like.

[Brief description of the drawings]

FIG. 1 is a front view of a coiling machine showing one embodiment of the present invention.

FIG. 2 is a front view showing an example of an operation mode of the coiling machine shown in FIG.

FIG. 3 is a front view showing a coiling machine according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Coiling machine 11 ... Core drive head 14 ... Core 15: Core unit 16 ... Core movement mechanism 31 ... Core holder 35 ... Switching mechanism

Claims (3)

[Claims] 1. A core metal rotating mechanism having a core metal driving head and a driving source for rotating the core metal driving head, a plurality of core metals for forming a coil spring are rotatably supported, and each of the core metals is respectively supported. A metal core unit having a metal core holder that can be moved to a position facing the metal core drive head; and the core so that a desired metal core among the plurality of metal cores faces the metal core drive head. A switching mechanism for moving the metal holder; and moving the metal core unit between a first position where the metal core is fitted to the metal core drive head and a second position where the metal core is separated from the metal core drive head. A coiling machine comprising: a core metal moving mechanism; 2. The core metal holder is rotatable about a rotation axis. A plurality of metal cores are arranged on the same radius around the rotation axis, and the core metal holder is rotated to rotate the core metal holder. The coiling machine according to claim 1, wherein the switching of gold is performed. 3. The coiling machine according to claim 1, wherein at least two of the plurality of metal cores provided in the metal core holder have different diameters.