JPS59223113A - Rotary wheel type metal continuous extruding machine - Google Patents

Abstract

PURPOSE:To obtain a titled extruding machine for reducing an extrusion resistance by dividing a base material flow into two, by constituting so that a circumferential groove checking abutment of a rotary wheel is provided before and behind, and orifices are provided on its front position, respectively and made to communicate to mandrel ports. CONSTITUTION:In a rotary wheel type metal continuous extruding machine which constitutes a pressure chamber of a circumferential groove 2 of a rotary wheel 1, a segment for covering a part of said groove, and a feeder block 4 on which an abutment 7 for checking said circumferential groove 2 is provided as one body, and is provided with an orifice 15 communicating to said chamber, a mandrel 5 and a die 5, the second abutment 7' for checking about 1/2 of a sectional area of a base material 8 in the circumferential groove 2 is provided on a front position of said abutment 7, and orifices 15, 15' communicating to corresponding mandrel ports 11, 11' are provided on the respective front parts. As a result, the extruding base material 8 becomes two divided flows from the circumferential groove 2, passes through the orifices 15, 15' and the ports 11, 11' without a large resistance, is extruded from an orifice 13 between the die 6 and a punch 14, and forms a hollow pipe.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotating wheel continuous metal extruder, in particular for extruding hollow products.

Conventionally, rotating wheel metal continuous extruders for continuously extruding hollow products are known. FIG. 1 shows the tool configuration of this extruder, in which a wheel 1 has a circumferential groove 2. A part of the opening surface of the circumferential groove 2 is covered with a segment 3 fixed to a frame (not shown) and a feeder block 4 to which abutments 1 to 7 for blocking the circumferential groove 2 are integrally attached, forming a pressure chamber. There is.

Furthermore, a mandrel 5 and a die 6 are housed inside the feeder block 4.

When the wheel 1 rotates, the continuous rod-shaped metal material 8 supplied to the circumferential groove 2 is held under frictional force by the circumferential groove 2, is drawn into the pressure chamber formed by the circumferential groove 2, the segment 3, and the feeder block 4, and is pulled into the abutment. It hits 7. The tip of the material 8 that has hit the abutment 7 becomes plastic due to the pressing force exerted by the following material, and then changes its direction of movement and is placed just in front of the abutment 7. through the orifice 15 of the feeder block 4,
The material is guided to the chamber IO and separated into a plurality of material streams by the boat 11 of the mandrel 5.

Further, the material flows merge in a chamber portion 12 of the die 6, and are extruded as a hollow material product through a ring-shaped gap formed by the punch portion 14 of the mandrel 5 and the die orifice 13.

By the way, the material coming out of the wheel circumferential groove 2 is divided into a plurality of flows by the mandrel ports 1 and 11, and all the energy required to be extruded from the die 6 through the mandrel port 11 is transferred from the wheel circumferential groove 2. You must have it with you when you leave. On the other hand, since a very large material pressure acts on the bridge portion 5a (FIG. 3) of the mandrel, this portion must have great strength to prevent deformation. For this reason, it is necessary to increase the thickness of the mandrel 5, but this increases the distance of the material passing through the mandrel port 11, which increases the extrusion resistance accordingly.

In the present invention, after the material 8 exits the wheel circumferential groove 2, the die 6
This is aimed at minimizing the extrusion resistance required from the beginning to the extrusion, and will be explained below with reference to FIG. 6 and subsequent figures.

The feeder block 4 has two orifices at the front and rear in the wheel rotation direction, namely a first orifice 15 and a second orifice 1.
5' is provided. Also, the abutment has a conventional structure with two orifices 1 outside the first abutment 1 and the mendoor.
5. Another 1st 2 abutment 7 in the middle of 15'
' is provided. The height of the second abutment 7' is lower than the final abutments 1 to 1, and is such that about 1/2 of the cross-sectional area of the material is measured.

With the above configuration, as the wheel 1 rotates, the material 8 is drawn into the pressure chamber, approximately 172 of the material's cross-sectional area is blocked by the second abutment 7', and flows into the die 6 from the second orifice 15'. do. The remaining material is blocked by the first abutment 7 and the first orifice 15
It flows into the die 6 from there.

Mandrel port N, 11' is orifice], 5.
15', the material 8 separated in the pressure chamber flows into the chamber 3 part 12 of the die 6 without applying any force to the mandrel bridge 5a, and the material 8 flows into the chamber 3 part 12 of the die 6. The products are merged and integrated in the section 12, and then extruded as a hollow product through an annular gap formed by the die orifice 13 and the punch section 14.

As detailed above, the material 8 is the first and second orifice 15.
and 15', and this separation takes place within the circumferential groove 2 of the wheel], that is, within the pressure chamber. Therefore, the resistance between the orifice +5.1.5' and the mandrel 5 becomes very small.

Further, since the material does not touch the bridge portion of the mandrel 5, it is not necessary to increase the strength of the mandrel portion as much as shown in the left, so that the thickness thereof can be reduced. Therefore, the extrusion resistance can be further reduced.

Furthermore, as a result of the extrusion resistance being reduced at two locations, at the time of separation and at the bridge portion, as described above, the amount of material protruding from the gap a (Fig. 5) created between the wheel circumferential groove 2 and the feeder block is reduced, resulting in a yield increase. It is economical because it can improve

[Brief explanation of the drawing]

4- FIG. 1 is a cross-sectional view showing a conventional extrusion-like tool configuration. Fig. 2 is an enlarged view of the part shown by the ■ arrow in Fig. 1. FIG. 3 is a diagram showing the mandrel, and is a view taken in the direction of the ■ arrow in FIG. FIG. 4 is a diagram showing the die and mandrel punch, and is a view taken in the direction of the ■ arrow in FIG. FIG. 5 is a sectional view taken along the line v-■ in FIG. 2. FIG. 6 is a sectional view showing a tool configuration according to the present invention. FIG. 7 is a diagram showing the feeder block, and is a view taken in the direction of the ■ arrow in FIG. FIG. 8 is a sectional view taken in the direction of the ■ arrow in FIG. In the figure: 1 Wheel 2 Circumferential groove 3 Segment 4 Feeder block 5 Mandrel 6 Dia, 7' abutment 8 Material 10 Chamber 11 Bo] ~ 12 Part of chamber 13 Orifice 14 Punch part
15.15' orifice or more ■ Figure 7 Section 8 7'' +5 (I5') 1 ・ ° 5 (

Claims (1)

[Claims] A pressure chamber is constituted by a circumferential groove of a rotating wheel, a feeder block integrally formed with a segment that covers a part of the circumferential groove, and an abutment that blocks the circumferential groove, and the feeder block has the pressure orifice leading into the chamber,
In a rotating wheel type continuous metal extrusion machine in which a mandrel and a die are arranged in series, a second abutment for blocking approximately 172 mm of the cross-sectional area of the material in the circumferential groove is placed at the front position of the circumferential groove blocking abutment formed in the feeder block. A rotating wheel metal continuous extruder, characterized in that abutments are formed spaced apart by a desired amount, and an orifice communicating with a corresponding mandrel boat is formed at the front of each abutment.