JPS5913932B2 - Equipment for forming gas vent grooves in billets for extrusion - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for forming gas vent grooves in an extrusion billet used in metal extrusion. The word for forming a mold material by ejecting it,
For example, this is done in aluminum molding.

In this case, a large amount of gas is present in the gap between the inner wall of the container and the billet, so this gas is compressed during pressing and remains in the corners and uneven parts of the container, or is rolled up inside the billet and formed by extrusion. This causes the surface of the mold material to become rough.

The technique described in US Pat. No. 2,688,400 is intended to improve the above-mentioned drawbacks. When inserting a billet into a container, the surface of the billet is cut to form a groove, and during extrusion molding, the groove is The gas inside the container is vented through the container.

However, this method has drawbacks such as the generation of chips and the need for post-processing of the chips.

The present invention solves the above-mentioned problems of the prior art, and also makes it possible to form gas vent grooves that are continuous in the longitudinal direction without interruption and have an appropriate depth on the surface of an extrusion billet by rolling molding. The purpose is to provide a device that can.

In other words, in the present invention, a plurality of grooved pressure rollers are provided facing each other in the running path of the extrusion billet that is conveyed into the container of the extrusion device by the driven lower feed roller, and the grooved pressure roller is At least one of the rollers is used as a driving roller, and the billet is pressed against the lower feed roller with the tip of the billet positioned at the entrance of the grooved pressure roller in front of the inlet side of the grooved pressure roller; This apparatus for forming gas vent grooves in an extrusion billet is characterized in that a feed roller is provided which raises the billet to release the billet after feeding the billet about halfway to the grooved press roller.

The following description will be made based on examples.

Taking the case of extrusion molding of aluminum as an example, when an extrusion billet is heated to 400 to 500°C, inserted into a container, and extruded, a groove forming process is performed between the heating process and the extrusion process. It is to be established.

Approximately six grooves are formed on the surface of the billet at approximately equal intervals in the axial direction.

The depth of the groove should be about 2 to 3 skins.

FIG. 1 is a perspective view showing the groove forming process, in which grooves 5 are formed by pressing an upper pressing roller 2, a lower pressing roller 3, and a side pressing roller 4 on a billet 1.

FIG. 2 is a cross-sectional view showing the arrangement of the grooved pressure rollers. has one grooved section.

The grooved portions of each roller are oriented toward the center of the billet 1 and are opposed to each other.

FIG. 3 is a front view of the device, FIG. 4 is a sectional view taken along the line A--A in FIG. 3, and FIG. 5 is a sectional view taken along <BB--B.

In the figure, 6 is a frame, 7 is a lower base, 8 is a motor, and 9 is an air cylinder.

12 is a lower feed roller, and the motor 8 is connected to the lower feed roller 12 via chains 10 and 11.
The grooved roller drives the lower pressing roller 3.

A feed roller 13 is attached to the lower end of the air cylinder 9, and a bearing is attached via a bracket 14.

A bearing 15 is a fulcrum part of the bracket 14.

The bearing of the grooved upper suppressing roller 2 is attached to a bracket 16, and its height is adjusted vertically by an adjusting bolt 1γ.

FIG. 6 is a partially cutaway plan view of the grooved upper pressing roller 20, in which the grooved upper pressing roller 2 is guided by the bracket guide 18.

Still, the pair of grooved side pressure rollers 4 are mounted on the pedestal 6 facing each other.

The grooved side roller 4 also allows for fine adjustment of its position.

19 is a first detection device, and 20 is a second detection device.

The first detection device 19 detects the entire tip of the billet 1 and turns on the motor 8.

The second detection device 20 detects the tip of the billet 1 and operates the air cylinder 9.

21 is a billet presser roller, and 22 is an adjustment bolt.

Further, 23 is a guide roller. FIG. 7 is a partially cutaway front view for explaining the operation of the billet 1 within the apparatus in an easy-to-understand manner.

The operation of the apparatus will be explained below with reference to FIGS. 3 to 7.

First, the billet 1 heated by a heating device (not shown) slides on a roller attached to an inclined lower base, and its leading end reaches the first detection device 19 .

The first detection device 19 senses the tip of the billet 1,
Turn on motor 8.

The motor 8 rotates and transmits its rotational force to the lower feed roller 12 and the grooved lower pressure roller 3 via the chains 10 and 11.

These drive the billet 1 towards the container.

Next, when the tip of the billet 1 reaches the second detection device 20, the second detection device 20 sends the signal to the air cylinder 9, and the feed roller 13 is rotated downward about the fulcrum 15 and lowered. I can make it.

Then, the feed roller 13 presses the top surface of the billet 1.

At this time, the billet 1 has already come into contact with the groove forming portions of the respective suppressing rollers 2, 3, and 4.

Therefore, the billet 1 that has been completely sandwiched between the feed roller 13 and the lower feed roller 12 is driven by the lower feed roller 12 and enters between each of the pressing rollers 2, 3, and 4 with grooves that have been adjusted to a predetermined interval. Then, predetermined grooves 5 are press-formed on the surface of the billet 1 in the axial direction.

When the billet 1 reaches the grooving press roller 3, the billet 1 is driven by the grooving press roller 3, so when the billet 1 reaches about half the position, the timer starts. When activated, the feed roller 13 rises.

Immediately after grooving begins, the presser roller 21 presses the top surface of the billet 1 to prevent it from shaking.

The driving of the motor 8 is stopped by a timer after grooving the billet is completed.

Since the apparatus of the present invention is as described above, it is possible to groove a billet without producing chips.

In addition, since the pressing rollers for grooving are provided opposite each other, the pressing force from each pressing roller against the billet is equal, and as a result, grooves of accurate depth can be formed without the billet rotating. .

Furthermore, during the first half of the grooved work, the billet is held between the lower feed roller and the feed roller, and the tip of the grooved billet is fed between the pressure rollers, and after the billet has advanced about half way, the feed roller rises to form the groove. Since the plate is moved forward by a pressure roller, the material around the groove may bulge when inserting the billet into the pressure roller, and in the latter half of the work, the tip of the billet may be pushed forward by the pressure of the feed roller. As a result, it is possible to continuously form grooves in a normal shape without raising the meat at the rear end of the billet, and it is possible to produce a billet with grooves that can be easily inserted into a container.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the process of grooving using the device of the present invention, Fig. 2 is a cross-sectional view showing the arrangement of the pressing roller for grooving, and Fig. 3 is a diagram of the device of the present invention. A front view of the embodiment, FIG. 4 is a sectional view taken along line A-A in FIG. 3, FIG. 5 is a cross-sectional view taken along line B-B in FIG. 3, and FIG. The plan view and FIG. 7 are partially cutaway front views of the reservoir for explaining the operation of the device according to the above embodiment. Roller, 3... Grooved lower pressure roller, 4... Grooved side pressure roller, 5...
... Groove, 6 ... Frame, 7 ... Lower base, 8 ... Motor, 9 ... Air cylinder, 10, 11 ... ...Chain, 12...
...lower feed roller, 13...feed roller, 14,16...bearing is bracket, 15...fulcrum part, 17,22...adjustment Bolt, 18... Bracket guide, 19.
...First detection device, 20...Second detection device, 21...Press roller, 23...
guide roller. -Question- -67=

Claims (1)

[Claims] 1 A plurality of grooved pressure rollers 2° 3.4 are provided facing each other in the running path of the extrusion billet that is conveyed into the container of the extrusion device by the driven lower feed roller 12, and the grooved At least one roller 3 of the suppression rollers is a driving roller, and
With the tip of the billet positioned in front of the inlet side of the grooved pressure rollers 2, 3, and 4, the billet is pressed against the lower feed roller 12, and the billet is pushed into the groove. A device for forming gas venting grooves in extrusion billets is provided with a feed roller 13 that rises to release the billet after feeding it about half way to the pressing rollers 2, 3, and 4.