JPH09220615A - Apparatus for producing bar-like or pipe-like extrusion-formed product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent bending of an extrusion-formed product when it is cooled while receiving a tension force by allowing the formed product to natural cool while claming the extrusion-formed product and applying the tension force under control of a clamp control part and a roller control part. SOLUTION: This apparatus is provided with a hot-extrusion machine 1, rollers 10 for shifting the bar-like or pipe-like extrusion-formed product 6 extruded by the hot-extrusion machine 1, stoppers 20 arranged at both ends of the roller 10 line, a clamp mechanism 30 an clamp control part 30A for clamping the end parts of the extrusion-formed product 6 and a roller control part 10A for rotation-driving the rollers 10 in the direction of diving the tension force to the extrusion-formed product 6 at the time of clamping the extrusion-formed product 6 with the clamping mechanism 30.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an apparatus for producing a rod-shaped or pipe-shaped extruded product by a hot extrusion method.

[0002]

2. Description of the Related Art A hot extrusion method is known as one of methods for producing a metal rod-shaped or pipe-shaped product.

FIG. 3 shows an example of a hot extruder used in the hot extrusion method. In the figure, the hot extruder 1 is
The pressure-resistant container 2, the extrusion part 3, the die 4, the die support 5, and the extrusion port 7 are substantially configured. In order to manufacture a rod-shaped or pipe-shaped extruded product 6 using this hot extruder 1, the high temperature metal 6a in the pressure vessel 2 is extruded by the extruding section 3. At this time, the high temperature metal 6a is extruded from the extrusion port 7 according to the shape of the die 4, and the extrusion molded product 6 is obtained. In particular, since the metal rod 8 is provided in the illustrated example, in this case, the metal rod 8 is punched in the hot metal 6a, and the hot metal 6a is extruded between the die 4 and the metal rod 8. As a result, a seamless pipe can be obtained as the extruded product 6.

The rod-shaped or pipe-shaped extruded product 6 thus obtained is cooled by leaving it in a stationary state.

[0005]

However, in the above-mentioned rod-shaped or pipe-shaped extruded product 6, since the cooling is performed in a stationary state, bending due to the stress during extrusion is likely to occur during cooling. Therefore, there is a problem that it is necessary to perform an operation of straightening the outer shape of the extrusion molded product 6, for example, a cold roll straightening. Further, when the cold roll straightening is performed, residual stress remains in the extrusion-molded product 6, which may lead to deterioration of quality over time. Therefore, it is necessary to further perform an annealing process and the like. In particular, when the extruded product 6 is pipe-shaped, problems such as stress corrosion cracking tend to occur.

The present invention has been made in view of the above circumstances, and it is possible to prevent bending of a rod-shaped or pipe-shaped extruded product during cooling, and to eliminate the need for post-processing such as cold straightening and annealing. An object of the present invention is to provide an apparatus for manufacturing a rod-shaped or pipe-shaped extruded product.

[0007]

According to a first aspect of the present invention, there is provided an apparatus for producing a rod-shaped or pipe-shaped extruded product, which is an apparatus for producing a rod-shaped or pipe-shaped extruded product by a hot extrusion method. A hot extruder, a plurality of rollers arranged in parallel to each other for moving a rod-shaped or pipe-shaped extruded product extruded by the hot extruder in the longitudinal direction of the extruded product, Stoppers arranged at both ends of the row of rollers to prevent movement of the extruded product, a clamp mechanism for clamping the end of the extruded product near each stopper, and the extruded product are A clamp control unit that clamps the extruded product for a certain period of time when it comes into contact with a stopper to release the clamp mechanism, and applies a tensile force to the extruded product clamped by the clamp mechanism. It is characterized by comprising a roller control unit for rotationally driving the roller in the direction. In the rod-shaped or pipe-shaped extruded product manufacturing apparatus according to claim 2, in the rod-shaped or pipe-shaped extruded manufacturing device according to claim 1, the roller corresponds to the outer surface shape of the extruded product. It is characterized in that a guide groove that is recessed is formed.

According to the first aspect of the present invention, the extruded product is extruded by the hot extruder and is conveyed by the rollers, but at that time, the extruded products come into contact with the stoppers arranged at both ends of the arrangement of the rollers. When the extruded product comes into contact with the stopper, the clamping mechanism clamps the end of the extruded product for a certain period of time under the control of the clamp control unit, and then releases it. While the extruded product is being clamped, the rollers are driven to rotate in a direction that gives a tensile force to the extruded product under the control of the roller control unit, and the extruded product is naturally cooled during this period. . That is, the extruded product is cooled while receiving a tensile force, so that the occurrence of bending is prevented. According to the configuration of claim 2, since the guide groove that is recessed corresponding to the outer surface shape of the extruded product is formed in the roller, the contact area of the roller with the extruded product can be increased. Increased pulling force.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a rod-shaped or pipe-shaped extruded product manufacturing apparatus of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of an apparatus for manufacturing a rod-shaped or pipe-shaped extruded product according to the present invention. The manufacturing apparatus includes a hot extruder 1, an auxiliary roller 8, a roller 10 and a roller control section 10A. , Stopper plate (stopper) 20, stopper control unit 20A, clamp mechanism 30, clamp control unit 30
It is mainly composed of A.

The hot extruder 1 is the same as the conventional one and extrudes a rod-shaped or pipe-shaped extruded product 6 in the form of a linear body, a cylindrical body, a cylindrical body or the like.

The auxiliary roller 8 conveys the extrusion-molded product 6 extruded by the hot extruder 1, and plays a role of a linkage for conveyance to the roller 10.

A plurality of rollers 10 are arranged in parallel at equal intervals in order to reciprocate the extruded product 6 in its length direction. Each roller 10 has an extruded product 6
A plurality of guide grooves 11 having a semicircular shape corresponding to the columnar outer shape and recessed over the entire outer circumference (in the illustrated example, 3
Pieces) are formed.

The roller controller 10A includes a plurality of rollers 10
When the extrusion-molded product 6 is clamped by a clamp mechanism 30, which will be described later, the roller 10 is controlled in a direction in which a tensile force is applied to the extrusion-molded product 6.

The stopper plates 20 are arranged at both ends of the arrangement region of the roller 10 along with the roller 10 so as to prevent the extruded product 6 from moving. The stopper plate 20 is provided with a sensor (not shown) for detecting that the tip 6a (shown in FIG. 2) of the extruded product 6 has come into contact with the stopper plate 20.

The stopper control section 20A includes a stopper plate 20.
Is controlled so as to move up and down, and during the cooling operation of the extruded product 6, the stopper plate 20 is lowered to prevent the extruded product 6 from moving, and when the extruded product 6 is carried in and out of the row of the rollers 10. The stopper plate 20 is not raised to prevent the extruded product 6 from being carried in and out of the area where the rollers 10 are arranged.

The clamp mechanism 30 is disposed near the stopper plate 20 and on the roller 10 side, and as shown in FIG. 2, an upper clamp body 31, a lower clamp body 32, and a drive mechanism for these (not shown). No)) and. In the upper clamp body 31 and the lower clamp body 32, concave portions 31a and 32a that are recessed in a semi-cylindrical shape corresponding to the cylindrical outer surface shape of the extruded product 6 are formed on the lower surface and the upper surface, respectively. When the body 31 and the lower clamp body 32 are driven so as to approach each other, the recess 31
The end portion of the extruded product 6 can be sandwiched and clamped between a and 32a.

The clamp control unit 30A includes a clamp mechanism 3
When the extrusion-molded product 6 contacts the stopper plate 20, the clamp mechanism 30 clamps the extrusion-molded product 6 for a certain time, and after the certain time, the clamp mechanism 30 is released. To do.

Next, a method of manufacturing the extrusion molded product 6 using the above manufacturing apparatus will be described. First, a rod-shaped or pipe-shaped extruded product 6 is extruded by the hot extruder 1. Then, in order to carry in the extruded product 6, the stopper control unit 20
Under the control of A, the stopper plate 20 is raised. Further, the extrusion-molded product 6 is conveyed in the lengthwise direction by the auxiliary roller 8 and the roller 10 and carried into the row of the rollers 10. When the loading of the extrusion molded product 6 is completed, the stopper control unit 20A
Under the control of 1., the stopper plate 20 is lowered to perform the cooling operation.

In this case, the extruded product 6 has its tip 6a conveyed toward the stopper plate 20 as shown in FIG. 2 (a), and eventually, as shown in FIG. 2 (b), the tip thereof is conveyed. 6a contacts the stopper plate 20. This contact is detected by a sensor provided on the stopper plate 20, the driving of the roller 10 is stopped by the roller control unit 10A, and the clamp mechanism 30 is operated by the clamp control unit 30A.
Is operated to clamp the end of the extruded product 6.

In this way, the extruded product 6 is clamped by the clamp mechanism 3.
Under the control of the roller control unit 10A, the roller 10 is clamped by 0, as shown in FIG.
It is driven so as to give a tensile force to the extruded product 6, that is, in a direction to convey the extruded product 6 from the clamped end to the other end of the extruded product 6. At this time, the extrusion-molded product 6 is not actually conveyed because it is in the clamped state, and is subjected to a tensile force in the length direction. During this period, the extruded product 6
Have been allowed to cool naturally.

After the clamp for a certain period of time, the clamp control unit 30A releases the clamp by the clamp mechanism 30, and the extruded product 6 is conveyed toward the other stopper plate 20. Then, similarly, the other stopper plate 2
A tensile force is applied to the extruded product 6 even on the 0 side.

This operation is repeated until the extruded product 6 is sufficiently cooled to such an extent that bending may not occur. After that, the stopper control unit 20A causes the stopper plate 2
It is raised to 0 and transferred to the next processing step or storage location.

In the manufacturing apparatus having the above-mentioned structure, under the control of the clamp control section 20A and the roller control section 10A, the extrusion molded product 6 is clamped while a pulling force is applied, and natural cooling is performed during this period. be able to. That is, since the extruded product 6 is cooled while receiving a tensile force, it is possible to prevent the occurrence of bending. Therefore, it is not necessary to perform a post-process such as a process of straightening the outer shape of the extrusion-molded product 6 and an annealing process, and it is possible to achieve a reduction in manufacturing time and a reduction in manufacturing cost.

Further, since the guide groove 11 is formed in the roller 10 so as to correspond to the shape of the outer surface of the extruded product 6, the contact area of the roller 10 with the extruded product 6 can be increased, and the extruded product 6 can be formed. It is possible to increase the pulling force against. That is, it is possible to effectively prevent the roller 10 from bending.

Since the plurality of guide grooves 11 are formed in the roller 10, the plurality of extruded products 6 can be cooled in parallel and simultaneously.

Stopper plate 20 and clamp mechanism 30
However, since the rollers 10 are arranged on both sides of the arrangement area of the roller 10, the extrusion-molded product 6 can be reciprocated and cooled. That is, the pulling force applied at the time of cooling can be applied from either side in the length direction, and uniform treatment can be performed in the length direction.

The present invention is not limited to the above embodiment, and the following modifications will of course not depart from the gist of the present invention. a) Instead of setting the number of the guide grooves 11 to three as shown in the figure, set the number to an arbitrary number. b) Instead of juxtaposing the rollers 10 at equal intervals, juxtaposing the rollers 10 at arbitrary intervals.

[0029]

The rod-shaped or pipe-shaped extruded product manufacturing apparatus of the present invention has the following effects. According to the apparatus for manufacturing a rod-shaped or pipe-shaped extruded product according to claim 1, under the control of the clamp control unit and the roller control unit, the extruded product is given a tensile force in a clamped state, and a natural force is exerted during this period. Allow to cool.
That is, the extruded product is cooled while receiving a tensile force, so that the occurrence of bending can be prevented. Therefore, it is not necessary to perform a post-process such as a process of straightening the outer shape of the extrusion-molded product and an annealing process, and it is possible to achieve a reduction in manufacturing time and a reduction in manufacturing cost. According to the apparatus for manufacturing a rod-shaped or pipe-shaped extruded product according to claim 2, since the guide groove that is recessed corresponding to the outer surface shape of the extruded product is formed in the roller, the roller contacts the extruded product. The area can be increased, and the tensile force with respect to the extruded product can be increased. That is, it is possible to efficiently prevent the occurrence of bending by the rollers.

[Brief description of drawings]

FIG. 1 is a plan view schematically showing an embodiment of a rod-shaped or pipe-shaped extruded product manufacturing apparatus of the present invention.

FIG. 2 is a partially enlarged perspective view for explaining a method of using the rod-shaped or pipe-shaped extrusion molded article manufacturing apparatus of the present invention, in which (a) to (c) are in accordance with the procedure. Each process is shown.

FIG. 3 is a diagram showing an example of a hot extruder used in a hot extrusion method.

[Explanation of symbols]

 1 Hot Extruder 6 Extrusion Molded Product 10 Roller 10A Roller Control Unit 11 Guide Groove 20 Stopper Plate (Stopper) 30 Clamping Mechanism 30A Clamping Control Unit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B21D 3/12 B21D 3/12 43/08 43/08 F25D 1/00 F25D 1/00 Z

Claims (2)

[Claims] 1. An apparatus for producing a rod-shaped or pipe-shaped extruded product by a hot extrusion method, which comprises a hot extruder and a rod-shaped or pipe-shaped extrusion molding extruded by the hot extruder. A plurality of rollers arranged in parallel to each other for moving a product in the length direction of the extruded product, and stoppers arranged at both ends of the arrangement of the rollers for preventing the extruded product from moving. , A clamp mechanism for clamping the end of the extruded product near each stopper, and a state in which the extruded product is clamped for a certain period of time when the extruded product contacts the stopper to release the clamp mechanism. And a roller control unit that rotationally drives the roller in a direction in which a tensile force is applied to the extruded product clamped by the clamp mechanism. Or a device for manufacturing pipe-shaped extruded products. 2. The apparatus for manufacturing a rod-shaped or pipe-shaped extruded product according to claim 1, wherein the roller is provided with a guide groove that is recessed corresponding to the outer surface shape of the extruded product.