KR20010081343A - Production method of multi gauge strips - Google Patents

Abstract

PURPOSE: A method for manufacture of deformed strips is provided to enhance productivity and save manufacture cost by manufacturing two final articles in one drawing. CONSTITUTION: Pipe material is drawn to form a diameter-reduced pipe(a) having sides(13) at the outer periphery with a reduced thickness(T1) and arc-shaped projections(12) at the upper and lower sections. The diameter-reduced pipe(a) is formed into an elliptical pipe(b) with the arc-shaped projections(12) of the diameter-reduced pipe(1) being deformed into flat projections(22). The elliptical pipe(b) is vertically pressed to form a strip(C) with the inner diameter of the elliptical pipe(b) being deformed into a straight line to connect ends(34) of both width sides(33). The ends(34) of the both width sides(33) are cut to divide the strip(C) into two strips.

Description

Production Method of Release Strips {PRODUCTION METHOD OF MULTI GAUGE STRIPS}

The present invention is the thickness of the center side width of the length of the copper strips (STRIPS) mainly used in semi-conductor lead frame or similar components of electrical and electronic components divided into about three equal lengths in the width direction. It relates to a method for producing a release strip (MULTI GAUGE STRIPS) thinly processed to about 40% of the thickness of the center portion.

In general, the method of manufacturing a release strip strip is a grinding method using a cutting tool only the thickness of both sides, leaving the center of the strip as it is, and a welding method of attaching a separate material only to the center of the strip by welding, and the direction of the material progress The SEESAW method (SS) for rolling in a right angle direction and the rolling method (RL) for rolling in a material progressing direction are known as manufacturing apparatus, among which the face-cutting method is a shape and thickness that is a required standard of the finished product (P). Precision, surface roughness, straightness, hardness, etc. Only the sides of the material width of the standard width are chamfered and the thickness of the thick part (TK) and the thin part (TN) are the same. It is difficult to meet the requirements such as roughness and straightness.

The welding method also requires high temperature of 800 ℃ or higher for the instantaneous joining, and the thermal deformation is difficult to satisfy the above requirements even by the calibration of skin pass or stretching. The product manufactured by the method has a problem in that the defect rate is high and the manufacturing cost is high and the product is treated as a lower product and used.

As the improved method after the above, as shown in FIG. 1, the strip material M is put into the mold TL, and then the strip material is pressurized as a seesaw in the right and left directions RA of the material M, and then strip material. There is a seesaw method (SS) in which the material (M) is extended (forward) in the width direction to fill the space (S) in the mold (TL) by alternately performing a sequential transfer method in which (M) advances. Since the material is deformed in the perpendicular direction RA of the material M traveling direction, the directivity of the material increases the mechanical properties in the width direction of the material, and the conducting wire having a width less than 1 mm in the subsequent pressing process. After bending, vertical bending near the thick line (TK) boundary of the center has the advantage of not breaking or breaking the material surface of the bent part, but the productivity is very low around 1 ~ 2m / min due to the restriction on the feed speed of the material. , Special Since the material (M) is rolled by pressurization only in the fixed state of the plane, a very large pressing force is required, and the operation direction of the rolling rollers should be done to the left and right of the material moving direction, thus requiring expensive large-scale dedicated equipment rather than general purpose equipment. There is a problem.

In addition, the rolling method RL shown in FIG. After forming the first rolling RL1 through the roller R neck N on both sides of the roller R, the first rolling RL1 is formed into a roller R, and then subjected to a heat treatment HT. In tandem secondary rolling (RL2) in which R) is arranged in series, widths L1 V1 and W1 and thicknesses T1 and t1 formed in primary rolling RL1 are defined as widths L2, V2, W2) and the thickness (T2, t2) and after receiving it from the next roller (R) to repeat the process of forming the shape of the width (L3, V3, W3) and thickness (T3, t3), It is intended to mold the width (L, V, W) and the thickness (T, t).

At this time, the width of the upper surface is narrowed to V1> V2> V3, and the width of both sides is widened to L1 <L2 <L3, and if it is widened to W1 <W2 <W3, the center thickness is thinned to T1> T2> T3 and the thickness of both sides width is also A manufacturing technique for slitting (SLITTING.SL) through a molding process thinning to t1> t2> t3 is known.

However, in the rolling method RL, the material is deformed only in the longitudinal direction of the material in which the deformation (stretching) direction of the material is the rolling direction of the material due to the nature of the rolling process, and the material in the width direction is perpendicular to the traveling direction of the material. Since the elongation to be deformed or elongated is so small as to be negligible compared to the elongation in the material advancing direction, the edges of both sides of the upper surface width (V1) are slightly narrowed by the tandem rolling method, and the entire cross-sectional volume is thinned and stretched in both width and length directions. Since the thickness and width of the material (M) is set to be larger than necessary about 1.6 times of the cross-sectional area of the finished product (P), the scraping process is performed by slitting after completion, which significantly lowers the utilization rate of the material. .

That is, the thickness of the material (M) is the thickness (T) of the center part width (V) of the finished product (P) by using a material (M) of 50% or more larger than the thickness of the finished product (P) and the width length is also larger than about 10%. The length of the width (L4), which is processed around 60% by the length of the width and the width of both sides (t), is increased by twice as long as the length of the finished product (P). When the width is shorter than the width of the finished product (P), the contact area of the material (M) is small or insufficient on the surface of the rolling roller (R). It is a reason to make it impossible.

Furthermore, in the tandem rolling method in which the rolling rollers R are arranged in series, the rolled length of the roller R is received by the secondary roller R, and the continuous rollers are subjected to continuous rolling. Done.

At this time, the length of the stretched material becomes 1st <2nd <3rd, so that the primary, secondary, and tertiary of the rolling roller R cannot perform continuous work at the same rotational speed. R) Requires a facility with a special function to control the rotation speed, each roller (R) has a separate roller (R) stand (STAND), so it is more expensive than the equipment applied in the seesaw method (SS) There is a problem of requiring a large, dedicated equipment.

In addition, since the roller (R) used for rolling corresponds to the tool for each finished product (P) standard, it is necessary to prepare a roller (R) of various specifications in small quantities and various types, and to manage and replace the roller (R) in every standard work. There is a problem of cost increase.

The present invention, in order to solve such a conventional problem, by drawing a pipe made of a material using a drawer and a low-cost dies and plugs that are simple to handle and operate, forming protrusions on the outer periphery and forming the shaft diameter tube into an elliptical shape. After processing into flat strips and cutting the left and right ends of the strip with a cutter, it provides a manufacturing method to produce finished products. It can produce two (heat) products by one drawing process, and it increases productivity by increasing the drawing speed. Its purpose is to improve greatly.

Another object is to provide a manufacturing method by using a drawing machine, so that it is possible to replace the production tools of various specifications, which are versatile and small quantity of equipment, with dies and plugs that are simple to manufacture and handle.

1 is a schematic process diagram showing a conventional method for manufacturing a release strip material.

Figure 2 is a plan view and side view showing an example as the present inventors manufacturing method

Explanation of symbols on the main parts of the drawings

a: shaft tube b: ellipse tube c: strip

30,40: Plug 10,20: Die 11,21,31: Protrusion groove

12, 22, 32: projection 60: cutter 50: spacer

M: Material (Pipe) P: Product 211: Upper Box

212: lower mold

The construction for achieving the technical problem to be achieved by the present invention is the continuous drawing process, the pipe material is formed into the shaft tube through the feeding process between the die and the plug and the shaft tube to the elliptical tube forming process and ellipse In the method of manufacturing a release strip consisting of forming a tube in a planar shape, the step of forming a circular arc-shaped protrusion on the upper and lower outer periphery of the shaft diameter tube formed by drawing the pipe material and thinning to the thickness of the left and right sides; After correcting the arc-shaped projection of the shaft tube with a planar projection and shaping it into an elliptic tube, the rear surface of the planar projection forms a large layer with each other and the inner diameter of the elliptical tube is closely and straightened. Molding into strips parallel to each other and having both widthwise ends connected to each other; The shaping is continuously performed by cutting both width ends so that the additionally connected strips are separated.

Looking at the configuration of the manufacturing method of the present invention based on the accompanying drawings by the embodiment as follows.

As shown in FIG. 2, the method for manufacturing a release member strip according to the present invention draws a pipe material M between the shaft diameter die 10 and the shaft diameter plug 30 in which the protrusion grooves 11 are formed above and below the inner circumference thereof. Subsequent to the feeding process and forming into the shaft tube (a), the thickness (T1) of the arc-shaped protrusions 12 and the pipe material (M) thickness (T) in the upper and lower portions of the shaft tube (a) in large layers. The upper and lower dies 211 and 212 having the shape of a mutual layer are assembled to form a rectangle, and the inner surface is centered. The gap between the calibration die 20 and the calibration plug 40 formed in the shape of the finished product is transferred to the planar projection 22 through the gap between the calibration die 20 having the projection grooves 21 and 31 and gradually becoming narrower and connected in parallel. Through the process of being calibrated and simultaneously formed into an elliptic tube (b), the protrusions 22 on the upper and lower outer periphery of the elliptic tube (b) The surface is straightened to be in close contact with each other so that the projection (32) and the side width (33) is parallel to the surface and formed on the strip (c) connected to both ends of the width 33, the end 34 and the ends of both sides (33) Step (c) is continuously formed by cutting (CT) by rotating the cutter so that both ends 34 of the strip (c) width (34) to which the 34 is connected are separated.

The operation of the present invention configured as described above will be described in detail with reference to the drawings shown in FIG. 2.

First, the coiled pipe material M is prepared in an uncoiler, a material supply device, and one end of the pipe material M is transferred to the die holder.

Next, BEADING is performed to stop the plug at a part of the outer diameter of the pipe material M, the drawing oil is injected into the inner surface, and then the shaft diameter plug 30 and the calibration plug 40 are inserted, and then the end of the pipe material M is inserted. By swaging, the shaft die 10 is transported to form a portion of the length into the shaft tube a, and after cutting the swaging portion, the shaft tube a is straightened from the upper end of the lower die 212. After mounting on, the upper die 211 of the straightening die 20 is assembled with the lower die 212 of the straightening die 20 by fastening the position fixing pin 213 and the bolt 214.

At this time, the shaft diameter tube (a) inserted into the inner surface of the calibration die 20 by the locking pressure of the fastening bolt 214 is deformed into the inner surface shape of the calibration die 20. That is, since the thinning of the raw material is completed when the shaft die 10 is transferred, only the shape of the die is deformed and molded.

Next, after the end of the pipe material M inserted in the calibration die 20 is bitten by the creep of the coiler, the cutter 60 is operated and the coiler is continuously operated to draw the pipe material (M). The feed is continuously fed between the die and the plug, and is formed into a strip (C) connected to both ends of the width 33 and the end 34 through the molding process of the shaft pipe (a) and the elliptic pipe (b).

At this time, the projection groove 11 provided in upper and lower portions on the inner circumferential surface of the shaft diameter die 10 is narrowed and deepened along the drawing angle 14 of the shaft diameter die 10 in the traveling direction of the material M. The pipe material (M), which is formed as a concave groove connected in parallel in a straight line at the portion, and the shaft diameter plug 30 is inserted into the inner surface, is fed to the inner diameter of the shaft diameter die 10, and the shaft diameter die 20 and the shaft diameter are reduced. The outer diameter and thickness T of the material M are reduced and deformed by the gap shape of the plug 40, and the large arc-shaped protrusions 12 and the left and right sides 13 of the pipe material M are formed on upper and lower outer periphery. The thickness T becomes the shaft diameter tube a shaped to the thinned thickness T1 and is then transferred to the calibration die 20 which is a process.

The arc-shaped projection 12 formed on the upper and lower outer periphery of the shaft diameter tube (a) transferred from the shaft diameter die 10 has a projection groove 21 provided with an inclination in the center of the upper and lower surfaces of the correction die 20. The arcuate projection 12 is formed into a planar projection 22 with the support of the straightening plug 40, and the shaft diameter tube a is formed into an elliptic tube b.

The elliptic tube (b) is a cross-section of the rear end of the calibration die (20) formed in the same shape as the strip (C) having a planar projection (32) and both side widths (33) in a multi-layered shape and having an end portion (34) connected thereto. The upper and lower plane projections 22 of the elliptic tube b are formed in a straight line while being transported to the cc section, and the upper and lower distances of the elliptic tube b are gradually narrowed and formed in a straight line. The (33) surfaces are formed in parallel and are formed into strips C having a shape in which both side widths 33 and end portions 34 are connected.

In the process, the straightening plug 40 prevents the buckling of the upper and lower peripheral edges of the outer circumferential center portion and the formed protrusion from the protrusion groove while the circular pipe is deformed into an oval shape, and facilitates continuous progress while maintaining the material progress axis direction. In addition, for this purpose, the outer diameters of the shaft die 10 and the calibration die 20 are constituted by four angles, and the spacer 50 is an external oil refilling space.

Next, the strip (c) to which the both ends 33 of the both sides 33 are connected is transferred to the section of the rotary cutter 60, and the two sides 33 and 34 of the ends 34 are cut (CT) and cut into two sheets (columns). It becomes the separated finished product P.

In the state of pipe processing, the inner surface of the pipe is molded by sliding contact with the inner surface of the die and the outer surface of the die in the tube state, and the protrusion is formed along the groove of the die so that the surface and shape can be obtained with excellent quality. have.

The present invention can be applied to two or more rows within the allowable range of the drawing force, without being limited to the two-row operation of the above-described embodiment, and may be changed to a state in which the protrusions formed on the outer surface of the pipe are embedded.

According to the above-described manufacturing method of the present invention, the conventional seesaw method and rolling method is easy to operate the processing method is extremely low productivity with a low productivity, applying a drawer which is a simple equipment, two finished products in one drawing operation ( Heat) can be produced and there is no constraint on the drawing speed, which can greatly improve productivity and contribute to the reduction of manufacturing cost.

In addition, regardless of the type of drawing machine, since it is possible to produce only a simple facility that can wind the material by transporting the die holder, it is economical by the versatility and low cost of the facility.

In addition, it is possible to produce with simple structure and inexpensive drawing tools, which can greatly reduce production tools and efficiently cope with producing various specifications of small quantity and various kinds.

In addition, since the material can be easily drawn out by using a pipe, there is no waste of material, and the drawing method itself can effectively perform the surface roughness, thickness precision, and straightness of the product. It offers many advantages, such as being able to produce.

Claims (1)

Manufacturing of release material strip which consists of forming the pipe material (M), which is drawn in between the die and the plug, into the shaft tube, forming the shaft tube into the ellipse tube, and forming the elliptic tube into the planar shape. In the method, the pipe material M is drawn and thinned to the outer circumferential left and right side surfaces 13 and the thickness T1 and formed into a shaft pipe (a) having an arc-shaped protrusion 12 on the upper and lower surfaces, and the shaft pipe. Through the process of correcting the arc-shaped protrusion 12 of (a) with the planar protrusion 22 and forming into an elliptic tube (b), the inner diameter of the elliptic tube (b) is straightened and both widths 33 Cutting the both ends (33) and the both ends (33) of the two ends (33) and forming the strip (C) to which the two ends (33) are separated. Method for producing a strip of release material characterized in that the molding is made in a step.