JPH03234313A - Method for removing metallic chips in rotating wheel type thrusting machine - Google Patents

Abstract

PURPOSE:To securely remove metallic chips and to improve labor saving and safety by curling and cutting the chips with the rake face of a cutting edge provided in contact with the surface of a rotating wheel. CONSTITUTION:The cutting edge 9 having a curved surface is used for the rake face and the cut metallic chips 11 are curled by the rake face 10 of the cutting edge 9 provided in contact with the surface of the rotating wheel 1 as it rotates. Further, bending strain for enlarging the bending radius with the rotating wheel 1 or the cutting edge 9 which makes an obstruction acts on the metallic chip 11 which is curled to some degree and the metallic chip is cut. The metallic chip which is cut and removed is formed into curled fine pieces and the aftertreatment is very easy.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to improvements in a rotating wheel type extruder, a so-called conform extruder, used for profile extrusion, pipe extrusion, and composite wire extrusion of metal materials, and improvements in the extruder. This invention relates to an improved method for removing metal debris generated on the surface of a rotating wheel.

(Prior Art) FIGS. 8 and 9 show a concrete example of a method for removing metal scraps and a processing apparatus therefor in an example of pipe extrusion using a conventional rotary wheel type extruder.

A is an extrusion wire made of, for example, Al rough wire.

1 has one or more endless grooves 2 (hereinafter referred to as
3 is a fixed block having a blocking wall 4 of the groove 2 protruding from the rear thereof.

The fixed block 3 is in sliding contact with the groove 2 of the rotating wheel l,
An introduction path for the extrusion wire a is formed between the groove 2 and the groove 2.

A coining roll 6 presses the extrusion wire material a into the groove 2 of the rotary wheel 1, and is fixed to the frame via a spring or the like, for example.

A die 5 and a mandrel 7 for extruding the extrusion wire a are attached to the fixed block 3.

The extrusion wire a is fed into the introduction vAB by the frictional force between the wire itself and the groove 2, is dammed by the closing wall 4 and pressurized, and is press-fitted into the fixed block 3 while undergoing plastic deformation. , extruded through a die 5 and a mandrel 7.

However, when such wire rods are extruded, metal debris is normally generated between the rotating wheel surface and the fixed block surface with a protruding blocking wall in the groove on the outer periphery of the rotating wheel. The removal methods and devices conventionally considered for removing this metal debris are as shown in FIGS. 8 and 9.

That is, FIG. 9 shows a perspective view of the removed metal scraps, and FIG. 10 shows a cross-sectional view of the adhesion of the metal scraps d to the surface of the rotating wheel 1.

8 is a cutting blade with a simple wedge-shaped cross section (hereinafter simply referred to as a wedge-shaped cutting blade), which is provided as a metal scrap removal device, and b indicates metal scrap removed by this cutting blade. .

(Problem to be Solved by the Invention) Conventionally, metal debris adhering to the surface of the rotating wheel is removed using a wedge-shaped cutting blade, and the removed metal debris is shown in FIG. 9. As a result, it becomes a continuous lump of irregular shape and rod-like or band-like shape, and it is difficult to process it with a machine after that, so that it has to be done manually.

However, this metal scrap has a high temperature of 100° C. or more, is mainly rod-shaped or band-shaped, and is hard and requires a large amount of force, which poses a safety problem for workers.

Furthermore, since this metal scrap comes out in an irregular shape, it sometimes gets entangled with peripheral equipment or the conforming machine itself, causing damage to the main machine, and so on.

(Means for Solving the Problems) The present inventor has solved the conventional technology described above by providing a cutting blade having a rake curved surface in place of the conventional wedge-shaped cutting blade in a rotating wheel type extruder. The present invention has been completed, which solves the problems and can reliably remove metal debris generated on the surface of the rotating wheel, and also saves labor and improves safety.

That is, the present invention provides; (1) a rotating wheel having one or more endless grooves on its outer circumferential surface; a fixed block having a blocking wall for the grooves protruding from a rear part of the rotating wheel that makes sliding contact with a portion of the outer circumferential surface; In a rotating wheel type extruder that essentially consists of a groove and an extrusion chamber for introducing an extruded wire between the blocks, a cutting blade provided in contact with the surface of the rotating wheel curls cut metal scraps on its rake surface. To provide a metal scrap removal device having a curved surface for the purpose of cutting and breaking,
the distance between the rotating wheel and the cutting blade is adjustable;
The metal scrap removing device is also characterized by: (1) The cutting edge of the cutting blade is attached at an inclined angle with respect to a straight line perpendicular to the cutting direction, that is, with respect to the cylindrical generatrix of the rotating wheel.

Furthermore, (i) in the rotating wheel type extruder, from between a fixed block surface having a closing wall protruding into one or more endless grooves provided on the outer periphery of the rotating wheel and the driving rotating wheel surface; A metal scrap removal method is also provided in which the metal debris that comes out and adheres to the rotating wheel surface is scraped off as small pieces from the rotating wheel surface by a cutting blade having a curved surface on the rake face, and simultaneously curled and broken into small pieces. do.

The present invention will be specifically explained based on FIGS. 1 to 7.

A specific example of the present invention is shown in FIGS. 1 and 2.

In FIG. 1, the extrusion wire a is a coining roll 6
is pressed against the groove 2 of the rotating wheel 1,
Due to the frictional force between the wire and the groove 2, it is pushed into the lead-in line and further into the fixed bronch 3, where it is extruded into a wire.

In the present invention, instead of the wedge-shaped cutting blade 8 in the conventional metal scrap removal device shown in FIGS.
As shown in the figure, a cutting blade 9 having a curved rake surface is used to scrape off metal chips d from the rotating wheel 1, and at the same time, the curved surface curls the chips and breaks them by bending action, thereby turning the metal chips into metal fine pieces. It is scraped off and removed as piece 11.

(effect) The operation will be explained in detail based on FIGS. 3 and 4.

In the conventional cutting method using a wedge-shaped cutting blade 8 as shown in FIG. 8, the removed metal debris becomes a continuous lump of irregular shape and rod-like or band-like shape, which cannot be processed by a machine as described above. Not only is this difficult, but it also poses a safety problem for workers.

In order to avoid such a situation, in the present invention, the third to fourth
As shown in the figure, the structure is such that the metal scraps are curled into a small radius by a curved surface provided on the rake face, that is, a part called a chimp curler in cutting engineering.

FIGS. 3 and 4 are horizontal views showing the transition of metal scraps into curled pieces by the metal scrap removal apparatus according to the present invention.

That is, FIG. 3 shows that as the rotating wheel 1 rotates,
The cutting blade 9 provided in contact with the surface gradually curls the cut metal chips 11 on the rake surface 10 in the order of (i) to (iii), and furthermore, in FIG. The rotating wheel 1 or the cutting blade 9 acting as an obstacle exerts a bending strain effect on the metal scrap 11 which is curled to a certain degree to expand its bending radius, and the transition of the state in which the metal scrap is broken is shown. There is.

As described above, the metal scraps cut and removed by the action of the metal scrap removing device of the present invention become curled strips, making subsequent processing extremely easy.

Here, the shape of the cutting blade 9 in the width direction is not particularly limited as long as the metal debris d attached to the surface of the rotating wheel 1 can be removed, but generally a flat blade as shown in FIG. Can be used.

In particular, as shown in FIG. 6, if the shape of the cutting blade 9 is matched to the shape of the groove 2, it is possible to remove metal debris that is generated in the groove 2 when the conform extruder starts operating.
It becomes possible to reliably supply the extruded wire rod a at the start of operation, and it becomes possible to start up in a short time.

Furthermore, by adding a configuration for appropriately adjusting the distance between the surface of the rotary wheel 1 and the cutting edge 12 in this metal scrap removal device, the thickness of the metal layer remaining on the surface of the rotary wheel 1 can be changed and When operating the foam extruder,
A minimum amount of metal debris is obtained so that the surface of the rotating wheel 1 and the fixed block 3 are not in contact, and economical operation of the conform is possible.

Furthermore, as shown in FIG. 7, by attaching the cutting edge 12 of the cutting blade 9 at an inclination angle e to a straight line perpendicular to the cutting method, that is, to the cylindrical generatrix of the rotating wheel, the metal layer is cut in the cutting direction. In addition, it is also curled in the width direction, making it easier to break.

Moreover, it becomes possible to flow the removed metal layer strips in a desired direction, and subsequent metal layer strips are easily formed.

The metal debris removal device and removal method of the present invention is not limited to a single rotation wheel (FIG. 1) as a conform, but can also be suitably applied to a multi-rotation wheel such as a two-rotation wheel (FIG. 2) or more. .

In addition, in the metal scrap removal device and removal method of the present invention, even if the number of grooves 2 provided on the rotary wheel is one or more, it is possible to cope with the problem by simply matching the shape of the cutting edge 12. The number can be arbitrarily determined.

(Effects of the Invention) As explained above, the metal debris removal device and method of the present invention can improve human safety and save labor.

Furthermore, since the metal pieces are scraped off in the form of small pieces, it becomes easy to automate the collection of metal scraps, and the metal pieces can be easily compressed, contributing to improved efficiency in scrap collection.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view showing the removal of metal debris in a single wheel conform according to the present invention. FIG. 2 is a schematic cross-sectional view showing the removal of metal debris according to the present invention in a plurality of, particularly two-wheel, conforms. FIGS. 3 and 4 are schematic diagrams showing how metal scraps are turned into curled pieces by the metal scrap removing apparatus according to the present invention. FIG. 5 is a perspective view showing a flat blade used in the apparatus and method of the present invention. FIG. 6 is a perspective view of a cutting blade adapted to the surface and groove shape of a rotary wheel used in the apparatus and method of the present invention, particularly a blade for grooves. FIG. 7 is an explanatory diagram of the inclination angle formed between the cutting edge of the cutting blade of the present invention and a straight line perpendicular to the cutting direction. FIGS. 8 and 9 are schematic diagrams showing a specific example of a method for removing metal scraps and a processing apparatus thereof in an example of vibrator extrusion using a conventional rotary wheel type extruder. FIG. 10 is a cross-sectional view showing the state of adhesion of metal debris. Rotating wheel 2: Endless groove 3: Fixed block 4: Closure wall 5; Die 6: Coining roll 7: Mandrel 8: Wedge-shaped cutting blade 9: Cutting blade 10: Rake face 11: Metal piece 12: Cutting edge a: For extrusion Wire b: Removed metal scraps C: Element wire d: Adhering metal scraps Figure 1 Figure 2 Figure 3 (1) (11) (iii) Figure 4 (i) (i:) (iii) Figure 5 Figure 6 Figure 7

Claims (3)

[Claims] (1) A rotary wheel having one or more endless grooves on its outer circumferential surface, a fixed block having a closing wall of the groove protruding from the rear part of the rotary wheel that makes sliding contact with a portion of the outer circumferential surface, and the groove and the block. In a rotating wheel type extruder, which essentially consists of an extrusion chamber into which an extruded wire is introduced between a A metal scrap removal device characterized by having a curved surface for the purpose of (2) The metal scrap removal device according to claim (1), wherein the distance between the rotary wheel and the cutting blade is adjustable. (3) The metal scrap removing device according to claim (1), wherein the cutting edge of the cutting blade is attached to a straight line perpendicular to the cutting direction, that is, at an angle of inclination to the cylindrical generatrix of the rotary wheel. (4) In the rotary wheel type extruder according to claim (1), the rotary wheel is driven by a fixed block surface having a closing wall protruding into one or more endless grooves provided on the outer periphery of the rotary wheel. A cutting blade having a curved surface on the rake surface scrapes metal debris that comes out from between the surfaces and adheres to the surface of the rotating wheel from the surface of the rotating wheel, and at the same time curls and breaks the metal chips into small pieces. A method for removing metal debris.