JPH059707U - Wire drawing equipment - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a device for uniformly applying a lubricant on a skin path after plating a welding wire and for adjusting a rotating die speed matching a wire drawing speed without using a drive by a motor. [Structure] A wire drawing die into which a wire rod that has come out vertically from a lubricant tank is inserted, a roller provided at a position where the wire rod comes into contact with the wire rod, and rotation of the roller is transmitted to the die. And a die holding mechanism for holding the roller, the die, and the entire mechanism including the die rotating holder in a vertically adjustable manner.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wire drawing apparatus, and more particularly to a wire drawing apparatus suitable for use in final drawing of a welding wire (hereinafter referred to as a skin pass).

[0002]

[Prior Art]

 Conventionally, the means for passing the wire into the lubricant tank and applying the lubricant to the surface to draw the wire is generally a simple method of installing the lubricant tank on the die entrance side for horizontal drawing. Has been adopted.

By the way, a steel wire for a welding electrode is plated with copper from the viewpoint of power supply during welding and rust prevention. Copper plating is performed by electroplating or chemical plating, and then a wire with a small reduction in area (called a skin pass) is performed to smooth the surface and remove pinholes in the plating layer. In addition, the lubricant remaining after drawing the wire remains in the final product as it is, and also takes charge of the lubricating action when the welding wire is used. If the residual lubricant is excessive, it may be harmful to welding, so the amount must be strictly controlled.

However, in the above method, since the viscosity of the lubricant changes due to the temperature change and the wire drawing speed changes, the lubricant cannot be evenly attached to the surface of the wire. When welded with, welding resistance becomes large, especially in the conduit tube, resulting in poor wire feeding performance and making the arc unstable.

Further, in recent years, a rotary die has been generally used as a measure for extending the life of the die because it is aimed at improving the wire drawing speed and targeting difficult-to-machine materials. However, if the wire drawing speed becomes faster and the die rotation speed becomes faster, the die becomes rough and the wire surface is damaged. In addition, since the lubricant is used in a bad environment such as the atmosphere, the die rotating motor often burns out.

[0006]

[Problems to be solved by the device]

 An object of the present invention is to provide a device for uniformly applying a lubricant in a skin pass after plating a welding wire and for adjusting a rotating die speed matching a wire drawing speed without using a drive by a motor. is there.

[0007]

[Means for Solving the Problems]

 The present invention solves the above-mentioned problems, and includes a wire drawing die into which a wire rod that has come out vertically from a lubricant tank is inserted, and a roller provided at a position where the wire rod comes into contact with the wire rod on the exit side. It has a die rotating holder for transmitting the rotation of the roller to rotate the die, and a die holding mechanism for holding the entire mechanism including the roller, the die and the die rotating holder so as to be vertically adjustable. It is a wire drawing device.

[0008]

[Action]

 In the present invention, the wire rod is taken out vertically from the lubricant tank and inserted into the die. That is, the surface of the lubricant and the front of the die face each other in parallel. As a result, the excess lubricant adhering to the wire rod coming out of the lubricant tank will fall naturally, and the amount of lubricant can be regulated. The reproducibility of the adhered amount is better than the method of taking out the wire in the horizontal direction and wiping it with a cloth pad, etc., and it is easy to manage.

Further, in the present invention, a roller is provided on the exit side of the die at a position where the roller comes into contact with the wire, and this rotational force is transmitted to the die rotating holder to rotate the die. A roller is provided on the exit side of the die, because tension is applied to the wire on the exit side of the die to pull it out, and a large contact pressure is generated only when the wire comes into contact with the roller in a tangential form. This is because it is possible to obtain a sufficient rotational force. If this is on the die entry side with low tension, in order to obtain a sufficient rotation force, it is necessary to wind the wire rod around the roller over a certain angle and secure the friction force.

That is, in the case of the present invention, as shown in FIG. 2A, since the wire 1 is in contact with the roller 2 in a shape close to a tangent line, the position of the roller 2 moves up and down as will be described later. The path line of the wire does not change even when it comes to the position. On the other hand, the method of winding the wire 1 around the roller 2 at an angle as shown in FIG. 2B is convenient when the roller itself also serves as a guide roller for changing the path of the wire. However, when the vertical position is changed, the path line of the wire rod 1 is changed as shown by the roller 2A in FIG. 2B, and the adjustment of the positional relationship with other equipment becomes complicated.

[0011] Further, one of the reasons for providing the roller on the outlet side is that the roller is likely to slip on the die inlet side where a large amount of lubricating oil adheres, but is less likely to slip on the outlet side.

Since the die is rotated by transmitting the rotational force of the roller as described above, there is no problem such as motor burnout, and when the drawing speed is high, the rotation of the die becomes proportional to it, and the wire Not only can the surface condition be kept constant, but the effect of extending the die life by rotating the die can be further increased.

Further, in the present invention, the die holding mechanism including the roller, the die, the die rotating holder and the like can be adjusted up and down. The amount of lubricant adhering to the wire rod coming out of the lubricant tank increases due to the viscosity when the temperature is low, and also increases when the wire rod speed increases. In order to deal with this, the distance between the lubricant surface and the die is changed to make the distance large under conditions where the amount of lubricant adhered is large, and small under conditions where it is small. This can reduce fluctuations in the amount of lubricant that adheres to the wire rod that enters the die. The amount of lubricant adhering to the final product depends on the amount of lubricant adhering to the die entry side under the same conditions under other conditions, so the amount of lubricant adhering to the product can be adjusted by adjusting the die holding mechanism up and down. Can be managed. Vertical adjustment of the die holding mechanism may be performed manually by measuring the temperature of the lubricant tank, the wire drawing speed, etc., but it is extremely convenient to automatically adjust by inputting these measured values. .

[0014]

【Example】

 FIG. 1 shows an embodiment of the present invention. A lubricant 3 is contained in the lubricant tank 8. The wire rod 1 immersed in the lubricant bath 8 is drawn by a die 5 and then comes into contact with the roller 2 and is pulled upward while rotating the roller 2. The rotation of the roller 2 is transmitted in order of the bevel gears 9A, 9B, 9C, 9D, and the worm wheel 11 is rotated via the worm gear 10. As a result, the die rotating holder-12 is rotated, so that the stored die 5 is rotated along with the feeding of the wire.

The roller 2, the die 5, the die rotation holder 12 and the like are mounted on a mounting base 13, and the mounting base 13 is penetrated by a feed screw 14 and guide rods 15A and 15B. Move to. That is, the screw feed device constituted by the mounting base 13 and the feed screws, etc. 14, 15A, 15B, 16 constitutes the die holding mechanism described above.

[0016]

[Effect of the device]

 According to the device of the present invention, the roller is rotated by feeding the wire, and the die is rotated by this, so that the surface condition of the wire of the product can be made constant and the life of the die can be extended. Also, since the distance between the lubricant tank and the die can be adjusted, it is possible to reduce fluctuations in the lubricant adhesion amount due to changes in the lubricant temperature and changes in the wire feed rate, and to ensure that the amount of lubricant remaining in the product is appropriate. Can be

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the device of the present invention.

FIG. 2 is a diagram showing a change in a wire rod pass line depending on a contact state between a roller and a wire rod.

[Explanation of symbols]

 1 wire rod 2 roller 5 die 8 lubricant tank 12 die rotating holder

Claims (1)

[Claims for utility model registration] [Claim 1] A wire drawing die into which a wire rod that has come out vertically from a lubricant tank is inserted, and a roller provided at a position where the wire rod comes into contact with the wire rod, A wire drawing, comprising: a die rotating holder that transmits the rotation of the roller to rotate the die, and a die holding mechanism that holds the entire mechanism including the roller, the die, and the die rotating holder in a vertically adjustable manner. apparatus.