JP2002143968A - Sizing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sizing apparatus capable of sizing a workpiece with a stepped outer diameter efficiently with high quality and also a straight workpiece with no steps in the outer diameter. SOLUTION: The apparatus is for sizing a workpiece, which is rolled by a cold rolling machine, in accordance with the shape of the workpiece. The apparatus is equipped with a sizing die 1 having a hole 2 with a large and small steps such that the hole is formed with a large diameter on one end and a small diameter on the other end. As the characteristic of the apparatus, on the large diameter hole end of the sizing die, there is installed a primary operating member 5 that can provide variable strokes in pushing the workpiece into the die and, on the small diameter hole end, which is opposite to the primary operating member across the sizing die, a sub-operating member 6 that can knock out the post-sizing workpiece to the primary operating member side is positioned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sizing apparatus for sizing a work rolled by a cold rolling machine according to the shape of the work, and more particularly to an apparatus suitable for sizing a work having an outer diameter step.

[0002]

2. Description of the Related Art Conventionally, a sizing apparatus of this type is shown in FIG.
A sizing cylinder 5a is installed on the work insertion side of the sizing die 1a, and an arm cylinder 6a for preventing the work from tipping is installed on the opposite side of the sizing die 1a. Sizing dies 1 while supporting the workpiece pushed by 5a with arm cylinder 6a
The work is dropped on a chute 8a provided below between the sizing die 1a and the arm cylinder 6a, and carried out to a predetermined place.

In the conventional sizing apparatus, since only one diameter hole is provided in the sizing die 1a, only a straight work having no step in the outer diameter can be sized. Although the stepped work W having the outer diameter as shown in the figure is not completely impossible, in this case, not only can the sizing be performed only on the large diameter side, but also the small diameter side Wa connected to the large diameter side as shown in the figure. However, there is a problem that the shape is expanded into a trumpet shape.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention solves the above-mentioned conventional problems and can efficiently size a stepped work having an outer diameter with a high quality, and furthermore, a straight work having no step in the outer diameter. It is an object of the present invention to provide a sizing device capable of sizing.

[0005]

Means for Solving the Problems To achieve the above object, the invention of claim 1 is to size a work rolled by a cold rolling machine in accordance with a work shape,
A sizing die having large and small stepped holes formed on one side with a large diameter and the other side with a small diameter, and a variable stroke main working member for pushing a work into the large diameter hole side of the sizing die. And a sub-operation member capable of knocking out a sized work to the main operation member side is provided in a small-diameter hole side opposite to the sizing die of the main operation member.

According to a second aspect of the present invention, in the first aspect, a chute for an outer diameter stepped work which is sized and dropped on the large-diameter hole side of the sizing die is provided between the sizing die and the main operating member. A chute for an outside diameter stepless straight work, which is sized and dropped on the small-diameter hole side of the sizing die, is provided between the sizing die and the auxiliary operating member.

In the above, it is preferable that the main operating member and the auxiliary operating member are cylinders.

[0008]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front cross-sectional view of a sizing device, in which 1 is a sizing die, which has large and small stepped holes 2 formed on one side in the axial direction with a large diameter and the other side with a small diameter. . That is, one side of the stepped hole 2 is a large-diameter hole 3 and the other side is a small-diameter hole 4, and the opening edge of the large-diameter hole 3 is formed to be slightly widened outward. . A main sizing cylinder 5 is provided on the large-diameter hole 3 side of the sizing die 1. Although not shown, the main sizing cylinder 5 is provided with a mechanical stopper on a rod to enable a variable stroke (stroke S
1 and the stroke S2), the work can be pushed to the fixed position of the die by adjusting this stopper.

On the side of the small-diameter hole 4 opposite to the sizing die 1 of the main sizing cylinder 5, there is provided a sub-sizing cylinder 6 capable of knocking out the sized work to the main sizing cylinder 5 side. Between the sizing die 1 and the main sizing cylinder 5, a chute 7 for an outer diameter stepped work which is sized and dropped on the large-diameter hole 3 side of the sizing die 1 is provided.
Further, between the sizing die 1 and the sub-sizing cylinder 6, a chute 8 for an outer diameter stepless straight work which is sized and dropped on the small-diameter hole 4 side of the sizing die 1 is provided.

When sizing a work W having an outer diameter step, the main sizing cylinder 5 is used.
As shown in FIG. 1, the large-diameter portion is located in the large-diameter hole 3 of the sizing die 1 while the work W pushed in as indicated by the arrow A is supported by the sub-sizing cylinder 6. Sizing so that the part is located. At this time, the stroke of the main sizing cylinder 5 is set to S
If it is set to 1, the work W will be exactly at the position as described above. In this sizing, the large-diameter portion of the work W is formed by being narrowed by a predetermined amount by the large-diameter hole 3 side, and the small-diameter side portion is formed by being narrowed by a predetermined amount by the small-diameter hole 4 side. A high quality product can be manufactured without deformation. After the sizing is completed, the work W is pushed into the main sizing cylinder 5 side as indicated by an arrow B by the sub sizing cylinder 6 while being supported by the main sizing cylinder 5 and knocked out. Thereby, the work W falls to the chute 7 and is carried out to a predetermined place.

When sizing a straight work having an outer diameter step, similarly, the work pushed in by the main sizing cylinder 5 is supported by the sub-sizing cylinder 6 so that the outer diameter portion is positioned in the small-diameter hole 4 of the sizing die 1. I do. At this time, if the stroke of the main sizing cylinder 5 is set to S2, the work will be exactly at the position as described above. After sizing, the main sizing cylinder 5
When the workpiece is pushed into the sub-sizing cylinder 6 side, the work falls to the chute 8 and is carried out to a predetermined place.

In this embodiment, the main sizing cylinder 5 is shown as the main operating member and the sub sizing cylinder 6 is shown as the auxiliary operating member. However, this is only a preferable example, and any other members having the same function can be used. Of course, a member may be used.

[0013]

Since the present invention has the above-described structure, a work having a step with an outer diameter, which has not been conventionally possible, can be efficiently sized with high quality. Moreover, there is an excellent effect that a straight work having no step in the outer diameter can be sized as in the conventional case.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing a sizing device according to an embodiment of the present invention.

FIG. 2 is a front sectional view of a conventional sizing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sizing die 2 Stepped hole 3 Large diameter hole 4 Small diameter hole 5 Main sizing cylinder (main working member) 6 Secondary sizing cylinder (sub working member) 7 Chute for step work with outside diameter 8 Straight work without step outside diameter Shoot for

Claims (2)

[Claims] 1. A method for sizing a work rolled by a cold rolling machine in accordance with the shape of a work, wherein one side has a large diameter and the other side has a small and large stepped hole. A sizing die is provided, and a main working member capable of variable stroke for pushing a work into the die is installed on a side of a large diameter hole of the sizing die, and a small-diameter hole side opposite to the sizing die of the main working member is sandwiched between the sizing dies. A sizing apparatus characterized in that an auxiliary operating member capable of knocking out the sized work to the main operating member side is provided. 2. A chute for an outer diameter stepped work which is sized and dropped on the large-diameter hole side of the sizing die is provided between the sizing die and the main operation member. The sizing apparatus according to claim 1, further comprising a chute for a stepless straight work having an outer diameter that is sized and dropped on the small-diameter hole side of the die.