JP2571817B2 - Metal composite tube continuous production equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an apparatus for continuously producing a metal composite pipe in which an inner pipe and an outer pipe are made of materials having different properties.

[Conventional technology]

Conventionally, extrusion or drawing using a composite billet has been mainly used as a continuous method for continuously producing a metal composite pipe, and there are limitations in terms of continuity, cost, and production required for producing a long material.

Therefore, recently, there has been proposed an extrusion method using a rotary wheel type extruder using one drive wheel (see Japanese Patent Publication No. 59-49087).

On the other hand, with respect to a method for producing a composite filament, an extrusion method using a rotary wheel type extruder using one or two drive wheels has been proposed (Japanese Patent Publication No. 60-1087, Japanese Patent Publication No. 60-57926). Gazette).

[Problems to be solved by the invention]

In the conventional method for continuously manufacturing a metal composite pipe using a rotary wheel type extruder, the amount of material (flash) escaping from a gap in the collecting chamber is not constant, so that the material supply amount fluctuates. There are disadvantages that it is difficult to control the extrusion speed of the tube in synchronization and to secure a sufficient pushing force.

Further, in the method of manufacturing a composite filament using a rotating wheel type extruder, there is only one gathering chamber, and when a single filament is passed through the chamber, it is merely an extrusion of the coating material around it. It was impossible to apply it to the production of composite pipes.

[Object of the invention]

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to make it possible to continuously and easily manufacture a metal composite pipe.

[Means for solving the problem]

The first continuous production apparatus for a metal composite pipe according to the present invention has a continuous circumferential groove provided on an outer peripheral portion thereof and is capable of rotating independently of each other.
The drive wheels are opposed to each other in a direction perpendicular to the extrusion direction, and are arranged with their axes shifted in the extrusion direction, engaged with the drive wheels, respectively, and covered a part of the circumferential groove in the longitudinal direction. A fixed tool that constitutes a material transfer path, and a projection that fits and slides in the circumferential groove on the fixed tool, and an independent set of outer pipe materials that communicates with the material transfer path before the protrusion. A chamber and an inner pipe material collecting chamber are provided before and after in the extrusion direction, and an inner pipe forming die and an outer pipe forming die are arranged concentrically, and the inner pipe material collecting chamber is provided in the inner pipe material collecting chamber. And a forming set comprising a mandrel inserted into the die with a predetermined gap therebetween. The outer pipe material collecting chamber is provided with an outer pipe forming die and the inner pipe forming mandrel located in the die. With a combined set consisting of an inner tube holding mandrel connected to the Ri is intended to achieve the object by such a configuration.

The second continuous production apparatus for a metal composite pipe according to the present invention has a continuous circumferential groove provided on an outer peripheral portion thereof, which is rotatable independently of each other.
The drive wheels are opposed to each other in a direction perpendicular to the extrusion direction, and are arranged with their axes shifted in the extrusion direction, engaged with the drive wheels, respectively, and covered a part of the circumferential groove in the longitudinal direction. A fixed tool that constitutes a material transfer path, and a projection that fits and slides in the circumferential groove on the fixed tool, and an independent set of outer pipe materials that communicates with the material transfer path before the protrusion. A chamber and a collecting chamber for inner pipe material are provided before and after in the extrusion direction, a die capable of extruding an inner pipe and an outer pipe on the same line in each collecting chamber, and a mandrel inserted with a predetermined gap in the die. And a composite set consisting of an outer pipe drawing die and a mandrel held at the entrance of the die is provided on the side of the outer pipe forming set in the extrusion direction. This achieves the above object.

〔Example〕

An embodiment of the first invention will be described below with reference to FIGS.

With two drive wheels rotatable independently of one another by drawing in the 1, 1 'the motor M _1, M _2, is opposed to the extrusion direction A perpendicular to the direction, and, by shifting the axial direction of extrusion A distribution The outer peripheral portion of each wheel is provided with a continuous circumferential groove 2, 2 '.

Reference numeral 3 denotes a fixed tool engaged with the drive wheels 1, 1 '. The fixed tool 3 has a part in the longitudinal direction of the circumferential grooves 2, 2' so as to form the material transfer paths 4, 4 ', respectively. The members 5 and 5 'which fit and slide on the lid, the projections 6 and 6' which fit and slide in the circumferential grooves 2 and 2 ', and the material transfer path 4 before the projections 6 and 6'. 4 and 4 ', an inner pipe collecting chamber 7 and an outer pipe collecting chamber 7' which are independent from each other before and after in the extrusion direction A are provided.

An inner tube forming set including a die 8 and a mandrel 9 is provided in the inner pipe collecting chamber 7, and an outer tube forming set including a die 8 'is provided in the outer pipe collecting chamber 7'.

The inner tube forming mandrel 9 is inserted into the inner tube forming die 8 and also inserted into the outer tube forming die 8 '. Thus, the outer tube molding die 8 'and is provided continuously to the inner pipe forming mandrel 9, the die 8' from the inserted mandrels 9-1 Prefecture, the inner tube holding the inner tube P ₁ composite for sets of the outer tube P ₂ to integrally be combined is provided on the outer surface of the P _1. Incidentally, FIG. 5, as shown in Figure 6, the inner tube P ₁ the connecting member 9-2 as pleated section or the small diameter section between the inner tube holding mandrels 9-1 and the inner pipe forming mandrels 9 It is more preferable to reduce the sliding contact with the inner surface of the.

Reference numeral 10 denotes an inner pipe speed sensor provided between the collecting chambers 7 and 7 '. Reference numeral 10 'denotes an outer tube speed sensor which is provided on the extruding direction A side from the collecting chamber 7'. In each case, the inner tube P ₁ ,
Extrusion conditions (thickness, profile change, etc.) of the outer tube P ₂ is intended for monitoring.

Reference numerals 11 and 11 'denote material supply speed sensors provided as needed.

(Operation)

Insert the inner tube material F ₁ into the material transfer path 4 and drive the wheel 1
Rotation of the direction of the arrow in the drawing, the inner tube F ₁ is by contact friction of the circumferential grooves 2 moves forward until it hits the projections 6. Then, a high pressure is generated by being pushed in even if it hits the projection 6, whereby the front end portion of the material is in a plastic state, so that the inner tube material F ₁ flows into the inner tube material collecting chamber 7 and flows into the mandrel 9. and extruded from an annular gap die 8 is formed, with the inner tube P ₁ is formed, the mandrel inner tube holding 9-1
And the outer tube forming die 8 '. Extrusion speed of the inner tube P ₁ is detected by the inner tube velocity sensor 10.

Similarly, the 'insert the outer tube material F ₂ in the drive wheel 1' material transfer path 4 to rotate in the arrow direction, the outer tube material F _2,
Due to the contact friction of the circumferential groove 2 ', it moves forward until it hits the projection 6'. Then, even if the protrusion 6 ′ is pressed into the outer tube F ₂ , the high pressure is generated, and the front end of the material is in a plastic state, so that the outer tube F ₂ flows into the outer tube collecting chamber 7 ′. , extruded inner tube holding mandrels 9-1 above the annular gap formed by the 'inner tube P ₁ and the die 8 to be moved into the' die 8, together with the outer tube P ₂ is molded, the mandrel 9 the inner tube P ₁ and the outer tube P ₂ are combined integrally by -1 and the die 8 ', the composite tube is continuously produced. In addition, tension can be applied to the tube after the compounding as necessary. Outer tube
Extrusion rate of P ₂ and the composite tube is detected by the outer tube velocity sensor 10 '.

As described above, the driving wheels 1, 1 'the motor M _1, M ₂
Can be rotated independently of each other, and by controlling the speed, the extrusion speeds V ₁ and V ₂ of the inner pipe P ₁ and the outer pipe P ₂ can be controlled independently. Becomes possible. This will be described with reference to FIG.

The initial rotational speed of the respective drive wheels 1, 1 ', the preset with the speed coefficient K ₁ by the composite index by extrusion conditions, the motor M _1, M _2, the speed detector provided in the respective
The rotation speed is controlled by feedback control via the TG. The extrusion speed of the inner tube P ₁ and the outer tube P ₂ by this
V ₁ and V ₂ are the inner tube speed sensor 10 and the outer tube speed sensor 10 ′
Is detected by Further, the coefficient K _{2 of the} speed difference is maintained so as to maintain the extrusion speeds V ₁ and V _{2 at} which the inner tube P ₁ and the outer tube P ₂ can be extruded.
If you set in advance, the rotational speed of the motor M ₂ based on the detection information from the inner tube speed sensor 10 outer tube velocity sensor 10 'to the motor M ₁ is controlled. Therefore, when the extrusion speeds V ₁ and V ₂ are set to V ₁ = V _{2 according} to the set value of the coefficient K _2, the inner pipe wall thickness becomes a dimension determined by the hole diameter of the die 8, but V ₁ <V ₂
I and pulled the outer tube P ₂ pull-out force occurs in the inner tube P _1, the wall thickness of the composite tube wall inner tube thickness thinner becomes thinner. Conversely,
If V ₁ > V ₂ , a compressive force is generated in the inner pipe P ₁ , the inner pipe becomes thicker, and the composite pipe becomes thicker. In practice, the operation of V ₁ = V ₂ is ideal, but in practice, V ₁ ≦ V ₂ (where V ₂ = V _{1 to} 1.1 V ₁ ), and the area where the drawing force always acts on the inner pipe P ₁ Used in.

Next, an embodiment of the second invention will be described with reference to FIG. The same components as those of the first aspect of the present invention are denoted by the same reference numerals, and description thereof will be omitted.

The inner tube forming mandrel 9 is inserted into the inner tube forming die 8, and the outer tube forming mandrel 9 'is inserted into the outer tube forming die 8'. Also, the molding sets 8, 9; 8 ', 9'
A composite set of a die 12 and a floating mandrel 13 held at the entrance of the die 12 is provided on the extrusion direction side. Thus, the inner tube P ₁ and the outer tube P ₂ after being continuously extruded without complex, complexed by the die 12 and the floating mandrel 13. Thus, the inner tube P ₁ and the outer tube
The second of the present invention a composite position of P ₂ is different from the first present invention, advantageous effects according to the first aspect and second aspect of the present invention are the same.

〔The invention's effect〕

As described above, the present invention provides two rotatable units independently rotatable from each other.
The drive wheels are opposed to each other in a direction perpendicular to the extrusion direction, and are arranged with their axes shifted in the extrusion direction, and the outer and inner pipe collection chambers that are independent of each other are moved back and forth in the extrusion direction. Because of this, it is possible to make the circumferential groove dimensions and material dimensions of the drive wheel differ according to the composite ratio, and it is the most important in the production of composite pipes and the speed of each pipe required for composite Adjustment can be performed reliably and easily, and controllability can be greatly improved. Therefore, there is no need to make the extrusion conditions of each tube the same as in the conventional case, and a composite tube can be continuously produced efficiently at low cost.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing an embodiment of the first invention, and FIG.
1 is a partially enlarged view of FIG. 1, FIG. 3 is a front sectional view corresponding to FIG. 2 showing a modification of the first invention, and FIG. 4 is a sectional view taken along line XX of FIG. FIG. 5 is a control circuit diagram, and FIG. 6 is a front sectional view showing an embodiment of the second invention. 1, 1 '... drive wheel, 2' ... circumferential groove, 3 ...
Fixing tool, 4, 4 '... material transfer path, 6, 6' ... projection, 7, 7 '... collecting chamber, 8, 8' ... die, 9,
9 ', 9-1 ... mandrel, 10, 10' ... speed sensor, 12 ... floating mandrel, 13 ... die, P ₁
…… Inner tube, P ₂ …… Outer tube. F ₁ …… Inner tube material, F ₂ …… Outer tube material.

Claims (2)

(57) [Claims] 1. Two mutually independently rotatable drive wheels provided with a continuous circumferential groove in the outer peripheral portion are opposed to each other in a direction perpendicular to the extrusion direction, and are arranged with their axes shifted in the extrusion direction. A fixed tool that engages with the drive wheel and covers a part of the circumferential groove in the longitudinal direction to form a material transfer path; A projection for forming the outer pipe material and an inner pipe material collection chamber, which are independent of each other and communicate with the material transfer path before the projection, are provided before and after in the extrusion direction. A die and a die are arranged concentrically, and the inner pipe assembly chamber is provided with a forming set consisting of an inner pipe forming die and a mandrel inserted with a predetermined gap in the die, and The collective chamber has a die for forming an outer tube and a mandrel located in the die and connected to the mandrel for forming the inner tube. Metal composite pipe continuous production apparatus characterized by complex for sets of provided comprising an inner tube holding mandrels which are. 2. Two mutually independently rotatable drive wheels provided with a continuous circumferential groove in the outer peripheral portion are opposed to each other in a direction perpendicular to the extrusion direction, and are arranged with their axes shifted in the extrusion direction. A fixed tool that engages with the drive wheel and covers a part of the circumferential groove in the longitudinal direction to form a material transfer path; And a plurality of independent outer pipe collecting chambers and inner pipe collecting chambers communicating with the material transfer path in front of the protrusions are provided before and after in the extrusion direction, and an inner pipe and an outer pipe are provided in each of the collecting chambers. And a forming set including a mandrel inserted into the die with a predetermined gap therebetween, and an outer pipe drawing die and the die are provided on the side of the outer pipe forming set in the extrusion direction. That a composite set consisting of mandrels held at the entrance of Metal composite pipe continuous manufacturing apparatus according to symptoms.