JP2582614B2 - Rotary rolling method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial application field> The present invention uses a plurality of rotary dies and a plurality of fixed dies fixed on the same axis, and can simultaneously roll a plurality of types of screws continuously. The present invention relates to a possible rotary type rolling method and apparatus.

<Conventional technology> A rotary die provided with a thread on the outer peripheral surface is fixed to the rotary shaft,
A fixed die having an arc-shaped screw thread is fixed to the fixed part adjacent to a part of this rotating die, and while rotating the rotating die at a constant speed, the gap between the rotating die and the fixed die, that is, the rolling space is formed. Rotary rolling is performed in which a screw material is supplied from a supply port, the screw material is rolled in the rolling space while the screw material is rolled, and a completed screw is sent out from an outlet of the rolling space. . This thread rolling is performed at a constant timing synchronized with the rotation of the rotary die, and the thread material is continuously supplied to the rolling space to perform the rolling, so that a large number of screws can be manufactured at high speed. .

<Problems to be Solved by the Invention> However, such a conventional rotary rolling method is capable of rolling only a die screw set there on a single rolling machine. Is
Since the rotating die and the fixed die must be replaced each time, and the replacement of the die involves complicated adjustment work, there has been a problem that it is not possible to efficiently roll a screw of a wide variety of small production.

The present invention has been made in order to solve the above problems, and provides a rotary rolling method and a rolling device capable of efficiently rolling a plurality of types of screws with one device. Aim.

<Means for Solving the Problems> For this purpose, the rotary rolling method of the present invention is to fix a plurality of rotary dies having different types of threads on the outer periphery on the same rotating shaft, and The fixed dies with the dies were arranged with a rolling space on the side of each rotary die, and the screw material was supplied from each supply port at the end of each fixed die, and each die was rolled by the rotation of each rotary die A plurality of types of screws are configured to be respectively delivered from outlets at ends of each fixed die.

In addition, the rotary rolling device is configured such that a plurality of rotary dies having different types of threads on the outer periphery are fixed on the same rotary shaft, and a fixed die having corresponding threads is rolled on the side of the rotary die. A space is provided, and a screw material supply port is provided at each end of each fixed die, and a discharge port is provided at an end of each fixed die opposite to each supply port. The plurality of types of screws rolled by the method described above are separately sent out from the outlets at the ends of the fixed dies.

<Operation> While the plurality of rotating dies are rotating at a constant rotation speed, the screw material is supplied at a predetermined timing from the supply port at the end of each fixed die. Each screw material rolls in each rolling space by the rotation of each rotary die, and is rolled into each screw material by the screw provided on the outer periphery of each rotary die and the corresponding screw of each fixed die. The forming is performed, and each screw rolled from each outlet of each fixed die end is separately delivered.

<Example> Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic plan view of a rotary rolling device, and FIG. 2 is a sectional view taken along line II-II of FIG. Rotary die 1,2
Are fixed up and down on the same axis, that is, on the rotation axis of a rotation drive mechanism (not shown), and are rotatable at a constant speed. On the outer peripheral surface of the upper rotary die 1, for example, a thread for M6 screw is formed, and on the outer peripheral surface of the lower rotary die 2, for example, a screw for M3 screw is formed.

On the side of the upper rotary die 1, a fixed die 3 is arranged with a predetermined gap, that is, a rolling space, and fixed to the fixed portion. The fixed die 3 is formed in an arc shape of about 90 degrees, and a thread for an M6 screw is engraved on the inner surface thereof. On the side of the lower rotary die 2, a fixed die 4 is arranged at a position opposite to the upper fixed die with a predetermined gap, that is, a rolling space, and fixed to the fixed portion. The fixing die 4 is formed in an arc shape of about 90 degrees, and a thread for M3 screw is engraved on the inner surface thereof.

This device is configured such that the M6 screw and the M3 screw are simultaneously and continuously rolled by rotating the rotary dies 1 and 2 in the direction of the arrow in FIG. The screw material supply port 5 for M6 screw is formed in the
A screw material supply port 6 for M3 screws is formed at one end, and screw discharge ports 7 and 8 are formed at the other ends of the fixing dies 3 and 4, respectively. That is, a supply shot 9 is provided so as to supply the screw material for the M6 screw to the supply port 5, and another supply shot 10 is provided so as to supply the screw material for the M3 screw to the supply port 6.
Is provided. On the other hand, discharge outlets 11 and 12 for discharging the rolled screws are provided at the discharge ports 7 and 8 on the opposite side, respectively.

Further, at the end of the supply shots 9 and 10, a material pusher 13 for pushing the screw material sent on the shot into the supply ports 5 and 6 at a predetermined timing synchronized with the rotary die.
14 is provided respectively, and a little upstream of the material stopper 1 for temporarily stopping the second and subsequent screw materials from the top
5,16 are provided respectively. These materials pusher 13,14
The material stoppers 15 and 16 are structured to operate in synchronization with the rotation thereof by a cam or the like (not shown) that rotates in cooperation with a rotary drive system that drives the rotary dies 1 and 2. Further, material shutters 17, 18 are provided in the supply ports 5, 6 so as to open the supply ports at the timing of material supply.

Each of the supply shots 9, 10 is connected to a vibration type part feeder or the like, and the screw material is sequentially supplied to each of the supply shots 9, 10 in a single row.

Next, a rolling method performed by using the above-described rolling device will be described.

While the rotary dies 1 and 2 rotate at a constant speed, the screw material A for the M6 screw is sent from the parts feeder to the supply shot 9, and the screw material B for the M3 screw is sent from the parts feeder to the supply shot 10. The head of the screw material A for M6 screw is sent to the tip of the material pusher 13, that is, the material supply port 5. When the rolling start port of the rotary die 1 reaches the supply port 5, the material shutter 17 opens and the material is opened. The pusher 13 operates, and the screw material A is pushed into the rolling space from the supply port 5. At substantially the same time, when the head of the screw material B for the M3 screw is sent to the tip end of the material pusher 14, that is, the material supply port 6, and when the rolling start port of the lower rotary die 2 reaches the supply port 6, When the material shutter 18 is opened, the material pusher 14 is operated, and the screw material B is pushed from the supply port 6 into the rolling space.

Screw material in the rolling space due to rotation of rotary dies 1 and 2
A and B move in the rotation direction while rolling, and the threads are rolled on the outer periphery of each material by the threads of the rotating dies 1 and 2 and the fixed dies 3 and 4, and the rolled M6 screw is Discharge shot from discharge port 7
The M3 screw is sent out from the outlet 8 to the outlet 12. The supply of the screw materials A and B and the rolling operation are performed by setting the rolling start ports of the rotary dies 1 and 2 to the respective supply ports 5 or 6.
The M6 screw and the M3 screw are continuously rolled, and each screw is sent to a separate container or the like from the dedicated discharge shots 11 and 12.

By the way, during rolling, since the rolling is performed substantially simultaneously on both sides of the rotary dies 1 and 2, it takes a longer time to apply to the rotating shaft of the rotary die than in the conventional case where the rolling is performed on only one side of the rotary die. The stress in the bending direction and the load on the bearing are extremely small, and the rotary dies 1 and 2 can be rotationally driven in a well-balanced manner.

In this way, screw material is supplied from two supply ports,
Since two types of rolling can be performed using the upper and lower rotary dies and the fixed die, thread rolling can be performed twice as efficiently as conventional rotary rolling, and two types of screws can be formed without replacing the die. Since the two types of screws can be rolled and each of these two types of screws can be sent out from a dedicated discharge shot, there is no need to install an expensive screw sorting device or the like.

In addition, three or more rotating dies are provided coaxially,
Similarly, increase the number of fixed dies and material supply ports and discharge ports.
More than two types of screws can be simultaneously rolled efficiently.

<Effects of the Invention> As described above, according to the rotary rolling method and apparatus of the present invention, a plurality of rotary dies having different types of screw threads on the outer periphery are fixed on the same rotary shaft, and The fixed dies with screw threads are arranged on the side of each rotary die with a space for rolling, and the screw material is supplied from each supply port at the end of each fixed die, and rolled by the rotation of each rotary die Since the plurality of types of screws are sent out from the outlets at the ends of the fixed dies, the plurality of types of screws can be simultaneously and extremely efficiently rolled by one rolling machine. In addition, since the rotating die and the rotating shaft can be rotated in a well-balanced load state, and the rolled screws are sent out from respective dedicated outlets, the device does not require a screw sorting device or the like, and can be manufactured at low cost. be able to.

[Brief description of the drawings]

1 shows an embodiment of the present invention. FIG. 1 is a schematic plan view of a rotary rolling device, and FIG. 2 is a sectional view taken along the line II-II of FIG. 1,2… Rotating die, 3,4 …… Fixed die, 5,6… Supply port, 7,8 …… Discharge port.

Claims (2)

(57) [Claims] 1. A plurality of rotary dies having different types of screw threads on the outer periphery are fixed on the same rotary shaft, and a fixed die having corresponding screw threads is formed on a side of each rotary die to form a rolling space. Screw material is supplied from each supply port at the end of each fixed die, and a plurality of types of screws rolled by the rotation of each rotary die are sent out from the discharge port at the end of each fixed die. A rotary rolling method, characterized in that: 2. A plurality of rotary dies having different types of threads on the outer periphery are fixed on the same rotary shaft, and fixed dies having corresponding threads are provided with a rolling space on the side of the rotary die. It is arranged, the supply port of the screw material is provided at the end of each fixed die, and the discharge port is provided at the end of each fixed die opposite to the supply port, respectively, and is formed by the rotation of the rotary die. A rotary type rolling device having a structure in which a plurality of types of screws are separately sent out from an outlet at an end of each fixed die.