JPH11347603A - Apparatus for manufacturing deformed cross section material and method for manufacturing deformed cross section material - Google Patents

Abstract

(57) [Summary] (Modifications) [PROBLEMS] An apparatus and a method for producing a high-quality irregularly shaped strip with reduced vibration and impact at a roll-formed portion. A rotor rotatable about a shaft core, a plurality of planetary rolls elastically supported at equal intervals on the outer periphery of the rotor, and a wheel having a part of a circumference on a straight line. Rolling section 5 having a flat rail 9 and a flat-shaped V-shaped die 2 installed at a portion opposed to a trajectory of a planetary rolling roll passing through a linear portion of the planetary rolling mill. A deformed cross-section strip (for power transistors) in which a preforming guide comprising a preforming roll 40 and a guide roll 50 capable of preforming the flat plate strip 1 of the material is provided in front of the flat V-shaped die of the manufacturing apparatus. Manufacturing apparatus and method for manufacturing lead frame material).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for manufacturing a profiled strip.
More specifically, the present invention relates to an apparatus and a method for manufacturing an irregularly shaped strip in which portions having different thicknesses in the width direction exist continuously in the longitudinal direction.

[0002]

2. Description of the Related Art The development of electronic components such as semiconductor packages in recent years has been extremely remarkable.

As a lead frame material of a general semiconductor package, a flat plate made of a copper alloy is used.

On the other hand, as a lead frame material for a semiconductor package for a power transistor, a copper alloy shaped cross section material is used.

FIG. 4 shows a cross-sectional view of one example of such a deformed cross-section strip.

In FIG. 4, reference numeral 20 denotes an irregularly shaped strip, 21 denotes a thick portion, and 22, 22 denote thin portions.

That is, in this example of an irregularly shaped strip, the cross-section central portion has a thick portion 21 and thin portions 22 on both sides of the thick portion 21.
22.

In the case of a soft low-melting metal material, for example, lead, aluminum or the like, an irregularly shaped strip can be easily manufactured by an extrusion method.

On the other hand, in the case of a hard refractory metal material, for example, copper, copper alloy, steel or the like, it is difficult to produce a deformed section by extrusion, and even if it can be produced, the productivity is low and the production cost is low. Will be higher.

[0010] For this reason, a copper alloy irregular cross section strip is manufactured by rolling a copper alloy flat strip. For example, as shown in FIG.
1 is manufactured by the following method or the like.

(1) Flat-plate-shaped V-die rolling method In this method, first, a flat-plate-shaped V-die having a V-shaped protrusion is prepared, and then a flat plate of a material is placed on the protrusion of the V-shaped die. The flat strip is placed, and then the flat roll is reciprocated while pressing the flat roll from above the flat strip to form a flat plate-shaped V-die on the side opposite to the rolling surface of the flat roll of the flat strip. The protruding portion is cut into the protruding portion, and then the flat strip is intermittently moved in a direction opposite to the tip angle of the protruding portion, and the series of operations are repeated to produce a deformed cross-section strip.

This method has the advantage that the flowability of the material in the width direction of the plate-shaped strip material is large, and the material can be formed in one step.

However, this method has a drawback that the rolling and forming process is intermittent, and as a result, a remarkable improvement in processing speed and productivity cannot be expected.

(2) Die Rolling Method for Improving Productivity This method is intended to improve productivity by measuring continuous rolling in the flat-plate V-shaped die rolling method of (1).

In this method, first, a planetary rolling mill having a plurality of planetary rolling rolls arranged on a circumference is prepared, and then a rolling surface having a projection on the outer periphery of the planetary rolling mill is curved inward. A curved V-shaped die is arranged, and then a flat plate made of alloy is supplied between the curved V-die and the planetary rolling mill, and then the flat plate is continuously formed into a deformed cross-section. A method of rolling and forming has been proposed.

According to this method, since the flat plate-shaped strip of the material can be continuously roll-formed into a deformed cross-section strip, the processing speed,
This is effective in remarkably improving productivity.

However, according to this method, it is difficult to process the curved V-die used, and as a result, the price of the curved V-die becomes high, and it is difficult to adjust the rolling dimension during the rolling forming operation.

(3) Improvement of rolling workability Flat plate-shaped V-die rolling method This method was proposed as a method of improving the rolling workability of the above method (2).

FIG. 5 is an explanatory plan view showing the conventional device for manufacturing a profiled section and the method for manufacturing the profiled strip shown in (3).

In FIG. 5, 1 is a flat strip, 2 is a flat V-shaped die, 5 is a planetary rolling mill, 6 is a planetary rolling roll, 7
Is a rotor, 8 is a shaft, 9 is a wheel-shaped rail, 10 is a straight section,
Reference numeral 14 denotes a compression spring, and reference numeral 20 denotes an irregularly shaped strip.

That is, the gist of the conventional device for manufacturing a profiled cross section and the method of manufacturing the profiled cross section is that the flat V-shaped die 2 and the linear portion 10 of the planetary rolling mill 5 disposed on the rolling surface side thereof.
The plate-shaped strip 1 of the material is fed in between them, and the planetary rolling mill 5 that revolves and rolls it into the irregularly shaped strip 20.

First, a flat-plate V-shaped die will be described.

FIG. 6 is an explanatory plan view of a flat disk-shaped V-die used in one embodiment of the method of manufacturing a profiled strip according to the present invention.

In FIG. 6, 2 is a flat disk-shaped V-die, 3 is a projection, and 4 is an inclined projection.

That is, on the rolled surface of the used flat-plate V-shaped die 2, two projections 3, 3 diverging in a V-shape from the tip side, are formed at predetermined intervals in the width direction. The projections 3 have the same width after the end of the V-shaped end. An inclined surface 4 serving as a rolling surface in the width direction is formed at a side edge portion of the tip of the flat disk-shaped die 2.

Although not shown, the rear surface of the flat disk-shaped V-shaped die 2 is supported by dimension adjusting means attached to the housing.

Next, the planetary rolling mill will be described with reference to FIG.

As can be seen from FIG. 5, the planetary rolling mill 5 comprises a rotor 7 rotatable around a shaft 8, a wheel-like rail 9 having the same axis as the rotor 7 but not rotating, and And a plurality of planetary rolls 6 supported at equal intervals.

The portion of the wheel-shaped rail 9 facing the flat V-shaped die 2 is a straight portion 10 having substantially the same length as the flat V-shaped die 2.

A plurality of planetary rolling rolls 6 supported at equal intervals on the circumference of the planetary rolling mill 5 are elastically supported so that their respective axes can move in the radial direction with respect to the revolving axes. Have been. Here, the elastic support in FIG. 5 uses the compression spring 14, but is not limited thereto, and may be, for example, a tension spring, a fluid pressure cylinder, rubber, or the like.

That is, the planetary rolling mill 5 is
Are resiliently supported by compression springs 14 so that their respective axes can move in the radial direction with respect to the axis of the orbit, and a part of the orbit of the orbit is linear, and passes through the linear portion 10. The flat disk-shaped V-die 2 is arranged at a position facing the locus of each of the planetary rolling rolls 6.

Next, a flat strip material 1 is formed at a processing location constituted by the flat plate-shaped V-die 2 arranged as described above and the planetary rolling roll 6 moving on the linear portion 10 of the planetary rolling mill 5.
Then, by operating the planetary rolling mill 5, the plate-shaped strip 1 of the material is roll-formed on the rolling surface of the flat plate-shaped V-die 2 with each planetary roll 6 passing through the linear portion 10, As a result, the flat strip 1 is continuously rolled into the irregularly shaped strip 20.

[0033]

The conventional apparatus and method for manufacturing a profiled strip shown in (3) above comprises a planetary rolling roll which rotates in one direction with a flat disk-shaped V-die 2. 6 has the advantage that the plate-shaped strip 1 as a raw material can be rolled and formed into the odd-shaped section strip 20 at high speed.

However, in the conventional device for manufacturing a profiled cross section and the method for manufacturing a profiled profiled bar shown in the above (3),
Since the planetary rolling roll 6 to be roll-formed revolves at a high speed and shifts from a curved portion to a straight portion,
There is a disadvantage that large vibrations and impacts are generated at the roll-formed portion where the flat disk-shaped die 2 is installed.

Further, in the conventional device for manufacturing a profiled section and the method for manufacturing a profiled strip shown in the above (3), the flat plate-shaped V-die 2 is revolved at high speed while the planetary rolling rolls 6 for rolling and forming revolve. Since the steel sheet enters the roll-formed portion at a high speed, there is a problem that the tips of the projections 3 and 3 of the flat V-shaped die 2 are greatly worn and damaged.

When the roll-formed portion is subjected to a large vibration or impact, the position of the plate-shaped strip processed at the tip of the V-shaped die is shifted, and as a result, the deformed cross-section strip obtained by rolling is deformed. Dimensional defects occur frequently. Also, if the tips of the projections 3 of the flat V-shaped die 2 are worn or damaged, the surface of the irregularly shaped strip obtained by rolling is frequently damaged or the dimensional accuracy is reduced. Worn and damaged flat V
When the die 2 is replaced, the productivity of the irregularly shaped cross-section member 20 is inevitably reduced.

The present invention has been made in view of such a point, and an object of the present invention is to solve the above-mentioned drawbacks of the prior art, and to reduce vibration and impact at a roll-formed portion. It is an object of the present invention to provide an apparatus and a method for producing a profiled cross-section member capable of remarkably reducing abrasion and damage of a V-shaped die, thereby producing a high-quality profiled section strip.

[0038]

SUMMARY OF THE INVENTION The gist of the present invention is to provide a rotor rotatable about an axis, and to be able to move at equal intervals on the outer periphery of the rotor and in a radial direction with respect to the axis. A plurality of planetary rolling rolls elastically supported as described above, and a wheel-shaped rail having the same axis as the rotor and being non-rotatable and having a linear portion on the circumference. A flat mill having two projections which are installed at a position facing a trajectory of the planetary rolling roll passing through a straight line portion of the planetary rolling mill, and whose rolled surface is divergently V-shaped from the front end side. In a device for manufacturing a profiled cross-section material formed by combining a plate-shaped V-die, a preforming guide comprising a preforming roll and a guide roll capable of preforming a flat plate-shaped material of a material at a position before the flat plate-shaped V-die. Is installed Modified cross-strip material manufacturing apparatus characterized by comprising, and the method for producing modified cross-strip material for rolling a flat elongated member to modified cross-strip material by using this modified cross strip material manufacturing apparatus.

In the present invention, as the pre-forming roll, there are provided projections extending in the circumferential direction at two places on the outer peripheral surface of the roll having a distance corresponding to the width of the thick portion of the deformed cross-section strip obtained by rolling. The guide roll is preferably a flat roll.

Further, in the present invention, as the preforming roll, protrusions extending in the circumferential direction are provided at two places on the outer peripheral surface of the roll at a distance corresponding to the width of the thick portion of the deformed cross-section strip obtained by rolling. It is provided and side guide plates are provided on both side surfaces of the roll, and the guide roll is preferably a flat roll having side guide plates provided on both side surfaces. Here, it is preferable that the side guide plates on both sides are provided at a distance corresponding to the width of the flat plate material.

[0041]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of an apparatus for producing a deformed section and a method for producing the section.

FIG. 1 is an explanatory plan view showing an embodiment of a device for manufacturing a deformed cross section material and a method for manufacturing a deformed cross section material according to the present invention.

In FIG. 1, 1 is a flat strip, 2 is a flat V-shaped die, 5 is a planetary rolling mill, 6 is a planetary roll, 7
Is a rotor, 8 is a shaft, 9 is a wheel-shaped rail, 10 is a straight section,
14 is a compression spring, 20 is a strip with a modified cross section, 23 is a preformed groove, 40 is a preformed roll, and 50 is a guide roll.

That is, the gist of one embodiment of the apparatus for manufacturing a profiled section material and the method for manufacturing the profiled section material of the present invention is a flat plate-shaped V-die 2, a planetary rolling mill 5, and a preforming roll. It is characterized by three points of a preforming guide consisting of a guide roll 50 and a guide roll 50.

Hereinafter, these will be sequentially described.

First, the flat disk-shaped V-die 2 will be described.

This flat plate-shaped V-die 2 is exactly the same as the flat plate-shaped V-die 2 shown in FIG. 6 which is used in the conventional device for manufacturing a deformed section and the method of manufacturing a section-shaped strip. Description is omitted.

Next, the planetary rolling mill 5 will be described.

The basic configuration of the planetary rolling mill 5 is the same as that of the planetary rolling mill 5 used in the conventional device for manufacturing a profiled section and the method for manufacturing a profiled strip shown in FIG.

That is, the basic configuration of the planetary rolling mill 5 used in the embodiment of the device for manufacturing a profiled cross section material and the method for manufacturing the profiled cross section material of the present invention comprises a rotor 7 that can rotate around a shaft 8,
The rotor 7 has a wheel-shaped rail 9 having the same axis as that of the rotor 7 but not rotating, and a plurality (eight in this embodiment) of planetary rolls 6 supported at equal intervals on the circumference thereof. I have. The portion of the wheel-shaped rail 9 facing the flat disk-shaped die 2 is a straight portion 10 having substantially the same length as the flat disk-shaped die 2.

A plurality of planetary rolling rolls 6 supported at equal intervals on the circumference of the planetary rolling mill 5 and having the same diameter are compressed so that their axes can move in the radial direction with respect to the revolving axes. It is elastically supported by a spring 14. Although the compression spring 14 is used for the elastic support in FIG. 1, the elastic spring is not limited to this, and may be, for example, a tension spring, a fluid pressure cylinder, rubber, or the like.

FIG. 7 is an enlarged sectional view of the supporting portion of the planetary roll 6.

In FIG. 7, 1 is a flat strip, 2 is a flat V-shaped die, 6 is a planetary roll, 7 is a rotor, 8 is a shaft, 9 is a wheel-shaped rail, 10 is a straight section, and 11 and 13. , 1
6 is a bearing, 14 is a compression spring, 15 is a wheel, and 61 is a projecting shaft.

As can be seen from FIG. 7, the rotor 7 is disposed on both sides of the wheel-shaped rail 9 with the shaft 8 via the bearing 11 and is rotatable with respect to the shaft 8. Therefore, by rotating the rotor 7, the plurality of planetary rolling rolls 6 revolve around the wheel-shaped rail 9.

As can be seen from FIGS. 1 and 7, the plurality of planetary rolling rolls 6 are rotatably supported by protruding shafts 61 protruding from both sides. Are rotatably supported. Wheels 15 of a predetermined size are rotatably mounted on both sides of the protruding shaft 61 via bearings 16, and the outer peripheral surface of the wheel-shaped rail 9 comes into contact with the outer periphery of the wheel 15. .

Then, a roll forming portion formed between the planetary rolling mill 5 and the flat plate-shaped V-die 2, that is, between the planetary rolling roll 6 and the flat plate-shaped V-die 2 in FIG. The plate-shaped strip 1 is fed to the roll-formed portion to be formed and roll-formed into a deformed cross-section strip.

Next, referring to FIGS. 1 to 3, a preforming roll 40 or a side forming preforming roll 41 which is a feature of the present invention will be described.
And a preforming guide composed of the guide roll 50 or the 51-sided guide roll.

As can be seen from FIG. 1, in the apparatus for manufacturing a profiled cross section material and the method for manufacturing a profiled cross section material according to the present invention, the preforming roll 40 and the guide roll 50 are positioned before the flat-shaped V-die 2 is installed. A preforming guide consisting of
The flat strip 1 fed by the preforming guide is preformed and guided, and the preformed flat strip 1 is then transformed into a planetary rolling roll 6 and a flat V-shaped die 2.
And roll-formed into a deformed cross-section strip 20.

FIGS. 2 and 3 are enlarged partial cross-sectional front views showing a state in which a flat strip is preformed by such a preforming guide.

First, FIG. 2 will be described.

The preforming guide used in FIG. 2 has two projections 2 extending circumferentially at two locations on the outer peripheral surface at a predetermined interval.
It comprises a preforming roll 40 provided with 5, 25 (here, a substantially V-shaped projection) and a guide roll 50 as a flat roll. Here, the projections 25, 25 of the preforming roll 40
Is the width of the thick portion of the irregularly shaped strip 20 to be roll-formed, that is, the width of the thick portion 21 shown in FIG.

The preforming roll 40 and the guide roll 5
Flat sheet material 1 having passed through a preforming guide consisting of
Are preformed grooves 2 at two locations on the surface spaced apart by a predetermined distance.
3, 23 are preformed.

Next, two preformed grooves 2 are formed on this surface.
The plate-shaped strip 1 preformed from 3 and 23 is fed to a roll-formed portion formed between the planetary rolling roll 6 and the flat plate-shaped V-die 2 and roll-formed into a deformed cross-section strip 20. At this time, the flat strip material 1 has two preformed grooves 2 on its surface.
Since the preforms 3 and 23 are preformed, the rolling forming load due to the tips of the projections 3 and 3 of the flat V-shaped die 2 is significantly reduced. As a result, the projection of the flat V-shaped die 2 is reduced. Abrasion and damage at the tip portions of the third and third parts can also be significantly reduced, so that a high-quality irregularly shaped strip 20 having no damage and high precision dimensions can be formed with high efficiency.

Next, FIG. 3 will be described.

The preforming guide used in FIG. 3 has two projections 2 extending circumferentially at two locations on the outer peripheral surface at a predetermined interval.
5 and 25 and side guide plates 24 on both side surfaces thereof;
24, and a guide roll 51 with side surfaces provided with side guide plates 24, 24 on both side surfaces of a flat roll.

Here, the interval between the projections 25, 25 of the side-formed preforming roll 41 is determined by the irregularly shaped section material 2 to be roll-formed.
0, that is, the width of the thick portion 21 shown in FIG.
The interval between 4 and 24 is the width of the flat strip 1 of the material. Similarly, the side guide plates 24, 24 of the guide rolls 51 with side surfaces.
Is also the width of the flat strip 1 of the material.

The preforming guide shown in FIG. 3 is a side-forming preforming roll provided with projections 25, 25 at two places on the outer peripheral surface at a predetermined interval and side guide plates 24, 24 on both side surfaces thereof. 41 and the guide rolls 51 with side surfaces provided with side guide plates 24, 24 on both side surfaces of the flat roll, so that the preformed grooves 23, 23 are preformed while holding the fed flat strip 1 from the width direction. As a result, the preformed grooves 23, 23 can be preformed accurately at predetermined positions. When the preformed plate-shaped strip 1 is fed into a roll forming portion formed between the planetary rolling roll 6 and the flat plate-shaped V-die 2 and roll-formed into the deformed cross-section strip 20, a flat plate-shaped V The rolling forming load due to the tips of the projections 3 and 3 of the die 2 becomes significantly smaller,
As a result, abrasion and damage of the tips of the projections 3 and 3 of the flat plate-shaped V-die 2 can be further remarkably reduced. Can be molded with high efficiency.

[0068]

According to the apparatus for manufacturing a profiled cross section material and the method for manufacturing a profiled cross section material of the present invention, abrasion and damage of the tip of the projection of the flat plate-shaped V-die can be remarkably reduced. It is capable of producing a high-quality irregularly shaped strip having high precision dimensions without trauma with high productivity, and is industrially useful.

[Brief description of the drawings]

FIG. 1 is an explanatory plan view showing an embodiment of a device for producing a deformed cross-section member and a method for producing a deformed cross-section member of the present invention.

FIG. 2 is an enlarged partial cross-sectional front view of a preforming guide used in an embodiment of a device for manufacturing a profiled cross section material and a method for manufacturing a profiled cross section material of the present invention.

FIG. 3 is an enlarged partial cross-sectional front view of a preforming guide used in another example of the modified cross-section strip manufacturing apparatus and the method of manufacturing the deformed cross-section strip according to the present invention.

FIG. 4 shows a cross-sectional view of an example of a deformed cross-section strip.

FIG. 5 is an explanatory plan view showing a conventional device for manufacturing a deformed cross-section and a method for manufacturing the deformed cross-section.

FIG. 6 is an explanatory plan view of a flat disk-shaped V-die used in one embodiment of the present invention.

FIG. 7 is an enlarged sectional view of a supporting portion of the planetary rolling roll.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plate-shaped strip material 2 Flat plate-shaped V-die 3 Projection part 4 Projection inclined part 5 Planetary rolling mill 6 Planetary rolling roll 7 Rotor 8 Shaft 9 Wheel-shaped rail 10 Linear part 11, 13, 16 Bearing 14 Compression spring 15 Wheel 20 Deformed cross-section strip material 21 Thick portion 22 Thin portion 23 Preform groove 24 Side guide plate 25 Projection 40 Preform roll 41 Preform roll with side surface 50 Guide roll 51 Guide roll with side surface 61 Projection shaft

Claims (7)

[Claims] 1. A rotor rotatable about an axis, and a plurality of planetary rolls resiliently supported on the outer periphery of the rotor at equal intervals and in a radial direction with respect to the axis. A planetary rolling mill comprising a roll, a wheel-shaped rail having the same axis as the rotor and being non-rotatable, and having a linear portion on the circumference, and passing through the linear portion of the planetary rolling mill. A profiled strip formed by combining a flat plate-shaped V-die having two projections which are installed at a portion facing the trajectory of the planetary roll and have a rolled surface diverging in a V-shape from the tip side. In the manufacturing apparatus, a preforming guide composed of a preforming roll and a guide roll capable of preforming a flat plate material of a material is provided at a position in front of the flat plate-shaped V-die. Material production equipment. 2. The preforming roll is provided with two circumferential projections on the outer peripheral surface of the roll at a distance corresponding to the width of the thick portion of the deformed cross-section strip obtained by rolling. The apparatus for producing a profiled strip according to claim 1, wherein: 3. A preforming roll is provided with two circumferential projections on the outer peripheral surface of the roll at a distance corresponding to the width of the thick portion of the deformed cross-section strip obtained by rolling. 2. The apparatus for manufacturing a profiled strip according to claim 1, wherein side guide plates are provided on both side surfaces. 4. The apparatus for manufacturing a profiled strip according to claim 1, wherein the side guide plates on both sides are installed at a distance corresponding to the width of the flat strip of the material. . 5. A rotor rotatable about an axis, and resiliently supported on an outer periphery of the rotor at equal intervals so as to be able to move in the radial direction with respect to the axis, and furthermore, a revolving orbit thereof. A planetary rolling mill comprising: a plurality of planetary rolling rolls each having a straight part; and a wheel-shaped rail having the same axis as the rotor and being non-rotatable, and having a linear part on the circumference. A flat plate-shaped V-shaped die having two protruding portions having a rolled surface diverging in a V-shape from the tip side at a portion facing a trajectory of the planetary rolling roll passing through a linear portion of the wheel-shaped rail. And then introducing a flat plate-shaped material between the planetary rolling mill and the flat plate-shaped V-die of the deformed cross-section member manufacturing apparatus, By operating the rolling mill, the straight line In a method for producing a profiled cross-section strip by rolling the flat strip into a cross-sectioned strip with the planetary rolling roll passing therethrough in a road, the flat strip of the raw material is subjected to the planetary rolling mill and the flat mill. A method for producing a profiled cross section material, wherein preforming is carried out by passing through a preforming guide composed of a preforming roll and a guide roll immediately before feeding into a disk-shaped V-shaped die. 6. The preforming roll is provided with two circumferential projections on the outer peripheral surface of the roll at a distance corresponding to the width of the thick portion of the deformed cross-section strip obtained by rolling. The method for producing a deformed cross-section strip according to claim 5, characterized in that: 7. A preforming roll is provided with two circumferentially continuous protrusions on the outer peripheral surface of the roll at a distance corresponding to the width of the thick part of the deformed cross-section strip obtained by rolling. The method for producing a profiled strip according to claim 5, wherein side guide plates are provided on both side surfaces.