JP2013244577A - Copper strip slitting device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the deformation and fluctuation of a copper strip during slitting, and further suppress the occurrence of surface flaws, droop on the side of the fracture surface, and side burrs without being influenced by shapes of the cutting edges of an upper disc cutter and a lower disc cutter to be used.SOLUTION: A copper strip slitting device includes a plurality of upper and lower disc cutters for applying shearing work to a copper strip to the extent that the copper strip is not completely broken off in the thickness direction, and a thrust roll for thrusting the copper strip to which the shearing work is applied in the thickness direction to be completely broken off and cut. A first shearing part composed of the upper disc cutter, the lower disc cutter, the lower disc cutter and the upper disc cutter combined in sequence, and a second shearing part composed of the lower disc cutter, the upper disc cutter, the upper disc cutter and the lower disc cutter combined in sequence are alternately arranged neighboring each other into a state that both the shearing parts neighboring each other use the set of upper and lower disc cutters in common. Between the upper disc cutters and between the lower disc cutters, rotary rolls are provided respectively, which are formed of elastic bodies to contact the surface of the copper strip during shearing work.

Description

  The present invention relates to a slitting device and a slitting method for a copper strip, and more particularly, to prevent deformation and fluctuation of the copper strip during slitting and to affect the shape of the cutting edge portion of the upper disc cutter and the lower disc cutter to be used. The present invention relates to a “no burr” slitting apparatus and a slitting method that further suppresses generation of surface scratches, cracks on the fracture surface side, and lateral burrs.

Depending on various applications required for electronic or electrical components, copper strips (copper or copper alloy thin plates) can be narrowed with high efficiency and accuracy by reducing the occurrence of surface scratches, burrs and drooling in the longitudinal direction. Recently, as a device and method for slitting, a “no burr” slitting device and a slitting method disclosed in Non-Patent Document 1 have begun to be widely used.
The “no burr” slitting device includes a copper strip unwinding and rotating device, an upper disk cutter and a lower disk cutter, a pressing roll and a winding rotating device, and the shearing of the upper disk cutter and the lower disk cutter is For each of a plurality of sections across the width direction of the copper strip, press a disc-shaped cutter on the top and bottom to form a step by shearing the copper strip so that the top and bottom of the copper strip are not completely separated. Is a device that breaks the metal flat plate at the working limit when it is pressed with a pressing roll to return it to a flat state, and is completely separated and cut into a plurality of thin copper strips. In order to improve the slitting accuracy, spacer dimensional accuracy, cutter dimensional accuracy and material, vertical axis parallelism and cylindricity, axial fixing (backlash) accuracy, appropriate clearance and lap setting and adjustment, etc. Need to be managed appropriately.
Usually, in the “no burr” slitting apparatus, the upper disc cutter and the lower disc cutter often use the cutting edge portion with a contact angle of 0 ° with respect to the copper strip. It is said that the contact area with the plate becomes large and scratches are likely to occur on the surface portion of the fine copper strip after slitting.
Furthermore, when the upper and lower disc cutters are sheared, the fine copper after slitting due to deformation caused by pressing each cutter against the surface of the copper strip, or variations in the deflection and breakage of the copper strip during roll pressing. When “sag” occurs at the edge of the strip, and the cross-sectional shape of the thin copper strip after the slit becomes trapezoidal, and the thin copper strip after slit is set in the machine in the next processing step In addition, it is said that the position accuracy is deteriorated because it does not enter the alignment guide or the like.

  As a technique for improving these drawbacks, Patent Document 1 discloses a plurality of upper and lower disk cutters to be subjected to shearing, a pressing roll that is completely separated and cut by a roll, and a winding for winding a copper strip. In a cutting device that includes a take-up and rotation device and cuts the copper strip in the longitudinal direction, the angle between the cutting edge of the upper disc cutter and the lower disc cutter and the copper strip is 10 ° or less (excluding 0 °). The surface of the copper strip due to the slitting of the copper strip characterized by the above is reduced, and the edge of the copper strip (slipping on the fracture surface side) can be cut with a small shape, and at the edge There is disclosed a burr-free slitting method and apparatus capable of producing a copper strip with less occurrence of lateral burrs, which are local protrusions.

JP2012-45696

“Backless slitting” Plasticity and processing, Vol. 20, no. 219, 1979, P270-275

  When the copper strip is cut into a thin copper strip in the longitudinal direction using the “no burr” slitting method and apparatus described in Patent Document 1, surface scratches on the thin copper strip due to the slitting of the copper strip A thin copper strip that can be cut in a shape that reduces the occurrence of the edge of the copper strip with a small angle (sag on the fracture surface side) and that produces little local burrs, which are local protrusions that occur on the edge. Although it can be manufactured, the life of the cutting edge of the upper and lower disk cutters used in it is short, and surface scratches, cracks on the fracture surface side, and horizontal burrs are also demanded by recent users. It is becoming difficult to meet dimensional tolerance requirements.

  In the present invention, deformation and fluctuation of the copper strip during slitting is prevented, and the surface of the surface, the crack on the side of the fractured surface, and the horizontal burr are not affected by the shape of the cutting edge of the upper disk cutter and lower disk cutter to be used. An apparatus and method for “no burr” slitting of a copper strip that can further suppress generation.

  As a result of diligent study, the inventors of the present invention have determined that a plurality of upper disc cutters and lower disc cutters between the upper disc cutters and the lower disc cutters in the “no burr” slitting apparatus and method for copper strips. The upper and lower disc cutters are used by preventing the deformation and fluctuation of the copper strip during slitting by providing rotating rolls made of an elastic material that contacts the surface of the copper strip during shearing. The present inventors have found that the generation of surface flaws, sag on the fracture surface side, and lateral burrs can be further suppressed without being affected by the shape of the cutting edge, and a method for calculating the optimum outer diameter of the rotating roll.

  That is, the slitting device for the copper strip of the present invention includes an unwinding rotating device for feeding the copper strip, and a plurality of upper disks for subjecting the copper strip to shearing so as not to be completely separated in the thickness direction. A cutter and a lower disk cutter, a pressing roll for pressing the sheared copper strip in the thickness direction to completely separate and cut, and a winding rotary device for winding the separated and cut copper strip In the slitting apparatus for cutting the copper strip in the longitudinal direction, the plurality of upper disc cutters and lower disc cutters are an upper disc cutter, a lower disc cutter, a lower disc cutter in the width direction of the copper strip, The first shearing part composed of the combination of the upper disk cutter and the second shearing part composed of the combination of the lower disk cutter, the upper disk cutter, the upper disk cutter, and the lower disk cutter are alternately arranged adjacent to each other. With both adjacent shears A pair of upper disk cutter and lower disk cutter are shared by each other, and between the upper disk cutters and between the lower disk cutters, elasticity that contacts the surface of the copper strip during shearing A rotating roll made of a body is provided, respectively.

In a slitting device that cuts a copper strip into a thin copper strip in the longitudinal direction, when the upper disc cutter and lower disc cutter are sheared, the disc cutter is pushed up and down in each of a plurality of sections extending in the width direction. It is necessary to form a step with high accuracy by applying shearing to such an extent that the copper strip is not completely separated in the thickness direction. For this purpose, the plurality of upper disk cutters and lower disk cutters are The first shearing part and the lower disc cutter, the upper disc cutter, the upper disc cutter, the upper disc cutter, the lower disc cutter, the second combination consisting of the upper disc cutter, the lower disc cutter, the lower disc cutter, and the upper disc cutter. A rotating roll made of an elastic material that comes into contact with the surface of the copper strip during the shearing process is installed between the upper disk cutters and the lower disk cutters by alternately arranging the shearing portions adjacent to each other. Is preferred
As shown in FIG. 7, when there is no rotating roll, the copper strip that has been sheared by the upper disk cutter and the lower disk cutter is bent upward in the first shearing portion, changed in position, the second shearing portion. Then, it is easy to cause downward bending deformation and position fluctuation, and it causes surface flaws, dripping on the fracture surface side, and horizontal burrs. Therefore, by installing a rotating roll, it is possible to suppress bending deformation or position fluctuation in the upward or downward direction. Since the material of the rotating roll is an elastic body, the deformation stress of the sheared copper strip is appropriately absorbed and the surface thereof is not damaged.
In this case, the rotating roll that rotates in synchronization with the upper disk cutter and the lower disk cutter does not need to be a roll integrated between the disk cutters, and as shown in FIG. And a narrow-width rotating roll composed of a plurality of rubber-like elastic rings installed in the center.
The copper strip in the present invention means a thin plate or strip of copper or copper alloy, preferably copper or copper alloy having a Vickers hardness of 50 to 130 HV and a thickness of 0.7 to 2.5 mm. It is a thin plate or strip.

  Furthermore, in the slitting device for a copper strip of the present invention, the rotating roll is a first rotating roll disposed between the upper disc cutter of the first shearing portion and between the lower disc cutter of the second shearing portion. And a second rotating roll disposed between the lower disk cutter of the first shear part and between the upper disk cutter of the first shear part, and the outer diameter of the upper disk cutter and the lower disk cutter is A (Mm), the overlap size of the upper disc cutter and the lower disc cutter is B (mm), the thickness of the copper strip is T (mm), and the outer diameter of the first rotating roll is C (mm) When the outer diameter of the second rotating roll is D (mm), {A−2 (T + B)} ≦ C ≦ {A−2 (0.5T + B) +1} and (A + 0.3T) ≦ D ≦ (A + 0.3T + 1).

When the outer diameter C (mm) of the first rotating roll is less than {A-2 (T + B)}, it adversely affects the shearing process, and it is difficult to suppress positional fluctuation. When the outer diameter C (mm) of the first rotating roll exceeds {A−2 (0.5T + B) +1}, bending deformation and position fluctuation are likely to occur.
When the outer diameter D (mm) of the second rotating roll is less than (A + 0.3T), bending deformation and position fluctuation are likely to occur. If the outer diameter D (mm) of the second rotating roll exceeds (A + 0.3T + 1), the shearing process is adversely affected. In this case, the second rotating roll is pressed and bent by the sheared copper strip, and is disposed radially inward from the cutting edge of the disk cutter on the shearing surface.
It is preferable that both ends of the first rotating roll and the second rotating roll are in surface contact with the upper disk cutter or the lower disk cutter.

  Furthermore, in the slitting device for the copper strip of the present invention, the cutting edge of the upper disc cutter and the lower disc cutter has a flat portion whose contact angle with the copper strip is 0 °, and an extension line of the flat portion. It is good in it being a partial taper cutting edge part which consists of an inclined part whose angle with the said copper strip formed in 5-30 degrees.

In the slitting device for the copper strip of the present invention, the cutting edge portions of the upper disk cutter and the lower disk cutter are not particularly limited. For example, a flat cutting edge portion having a contact angle with the copper band plate of 0 °, a copper band plate An angled blade edge with an angle of 10 ° or less (excluding 0 °) may be used, but the most suitable is that the blade edge of the upper disk cutter and the lower disk cutter has a contact angle with the copper strip. It is a partial taper cutting edge part which consists of an inclined part whose angle of the flat part which is 0 degree, and the copper strip formed on the extension line of the flat part is 5-30 degrees.
By making the flat part of the partially tapered blade edge part the optimum width and having an inclined part with an angle of 5 to 30 ° with the copper strip formed on the extension line of the flat part, surface scratches are generated and slit. It is possible to minimize deformation of the copper strip in the width direction, increase in the edge angle of the slit fine copper strip, and occurrence of lateral burrs. If the angle with the copper strip is less than 5 ° or more than 30 °, these effects cannot be expected.
In addition, the tapered blade edge with an angle of more than 0 ° with the copper strip has less surface contact with the copper strip during slitting of the copper strip, and therefore the tip of the blade is liable to chip and deform and wear. Although it tends to be large and have a short life, the partially tapered blade edge portion of the present invention can have a life of 1.5 to 2.0 times as compared with that.

  Furthermore, in the slitting device for a copper strip of the present invention, when the width of the flat portion is X (mm) and the width of the inclined portion is Y (mm), X / (X + Y) is 0.45. It is 0.78.

  As an optimum slitting condition of the copper strip in the present invention to the fine copper strip, X / (X + Y) is preferably 0.45 to 0.78. If X / (X + Y) is less than 0.45, surface scratches are likely to occur, and the life of the cutting edge tends to be shortened. If it exceeds 0.78, the effect of reducing the angle of the edge and suppressing the occurrence of lateral burrs is obtained. It tends to fall slightly. In this case, X + Y is the full width (thickness) of the partially tapered blade edge.

  Furthermore, the slitting device for a copper strip of the present invention has a Vickers hardness of 50 to 130 HV and a thickness of 0.7 to 2.5 mm, and the upper disc cutter and the lower disc cutter are The thickness (X + Y) of the blade edge portion is 3 to 8 mm.

A copper strip having a Vickers hardness of 50 to 130 HV and a thickness of 0.7 to 2.5 mm at a partially tapered cutting edge where X / (X + Y) of the present invention is 0.45 to 0.78. When slitting to a thin copper strip, it is preferable that the thickness (X + Y) of the edge part of an upper disk cutter and a lower disk cutter shall be 3-8 mm. If X / (X + Y) is less than 3 mm, the effect of reducing the angle of the edge and suppressing the occurrence of horizontal burrs tend to be reduced, and the life of the cutting edge tends to be shortened. It affects the suppression effect.
In this case, as a secondary effect, the amount of bending of the slitted copper strip is reduced.

  Also, the slitting method of the copper strip of the present invention is to press a plurality of upper disc cutters and lower disc cutters on the upper and lower sides of the copper strip, perform shearing to such an extent that they are not completely separated, and then press with a roll. In the slitting method for completely separating and cutting, the plurality of upper disk cutters and lower disk cutters are a combination of the upper disk cutter, the lower disk cutter, the lower disk cutter, and the upper disk cutter in the width direction of the copper strip. The first shearing portion and the second shearing portion consisting of a combination of the lower disc cutter, the upper disc cutter, the upper disc cutter, and the lower disc cutter are alternately arranged adjacent to each other. A pair of upper disk cutter and lower disk cutter are shared by each other, and a rotating roll made of an elastic body provided between each upper disk cutter and between the lower disk cutters is being sheared. Wherein contacting the surface of the kidou strip.

  Furthermore, in the slitting method of the copper strip of the present invention, the rotating roll is a first rotating roll disposed between the upper disc cutter of the first shearing portion and between the lower disc cutter of the second shearing portion. And a second rotating roll disposed between the lower disk cutter of the first shear part and between the upper disk cutter of the first shear part, and the outer diameter of the upper disk cutter and the lower disk cutter is A (Mm), the overlap size of the upper disc cutter and the lower disc cutter is B (mm), the thickness of the copper strip is T (mm), and the outer diameter of the first rotating roll is C (mm) When the outer diameter of the second rotating roll is D (mm), {A−2 (T + B)} ≦ C ≦ {A−2 (0.5T + B) +1} and (A + 0.3T) ≦ D ≦ (A + 0.3T + 1).

  Further, according to the slitting method of the copper strip of the present invention, the cutting edge portions of the upper disc cutter and the lower disc cutter have a flat portion whose contact angle with the copper strip is 0 °, and an extension line of the flat portion. It is a partial taper cutting edge part which consists of an inclined part whose angle with the said copper strip formed in 5-30 degrees.

  Furthermore, the slitting method of the copper strip of the present invention is such that X / (X + Y) is 0.45 to 0 when the width of the flat portion is X (mm) and the width Y (mm) of the inclined portion. .78.

  Further, according to the slitting method of the copper strip of the present invention, the Vickers hardness of the copper strip is 50 to 130 HV, the thickness is 0.7 to 2.5 mm, and the upper disc cutter and the lower disc cutter are The thickness (A + B) of the blade edge portion is 3 to 8 mm.

According to the present invention, deformation and fluctuation of the copper strip during slitting can be prevented, and without being affected by the shape of the edge of the upper disk cutter and lower disk cutter to be used, surface scratches, cracks on the fracture surface side, lateral burr A “no burr” slitting apparatus and slitting method that further suppresses the occurrence are provided.

It is the front view which made the copper strip plate the cross section which shows the state which is carrying out the shearing process of the copper strip with the upper disk cutter and the lower disk cutter in the slitting apparatus of one Embodiment of this invention. It is a whole lineblock diagram of the slitting device of one embodiment of the present invention. It is the front view which made the cross section the copper strip which shows the state which pinched | interposed the copper strip with the press roll in FIG. It is an enlarged view explaining the dimensional relationship of a disk cutter and a press roll. It is the front view which made the copper strip which shows the partial taper cutting edge part of a disk cutter a cross section. It is a front view similar to FIG. 1 which shows the state which is carrying out the shearing process of the copper strip by the slitting apparatus of other embodiment of this invention. It is a front view similar to FIG. 1 which shows the state which is shearing the copper strip with the slitting apparatus which does not have a rotating roll. It is the schematic diagram which showed the angle measurement site | part of the thin copper strip edge part after a slit. It is an outline shape figure of a fine copper strip edge part.

  1-5 has shown one Embodiment of the slitting apparatus of this invention. The slitting device of this embodiment includes an unwinding rotating device 2 that feeds out a wide copper strip 1 and a plurality of upper disk cutters that shear the copper strip 1 to the extent that it is not completely separated in the thickness direction. 3 and the lower disk cutter 4, a pressing roll 6 for completely separating and cutting the copper strip 5 subjected to shearing processing in the thickness direction, and a winding for winding the separated and cut copper strip 7 And a rotating device 8.

  A plurality of upper disc cutters 3 and lower disc cutters 4 are arranged on a pair of upper and lower shafts 11 and 12 arranged in parallel via spacers 13 and 14, respectively. The copper strip 1 fed from the unwinding and rotating device 2 is subjected to shearing by being passed between the disc cutters 3 and 4. The upper disk cutter 3, the lower disk cutter 4, the lower disk cutter 4, the upper disk cutter 3, the upper disk cutter 3, the lower disk cutter 4, and so on are arranged in the width direction from the one side edge. In this case, a first shearing portion 15 comprising a combination of the upper disk cutter 3, the lower disk cutter 4, the lower disk cutter 4, and the upper disk cutter 3, the lower disk cutter 4, the upper disk cutter 3, the upper disk cutter 3, and the lower disk A state in which the second shearing portions 16 composed of the combination of the cutters 4 are alternately arranged adjacent to each other, and a pair of the upper disc cutter 3 and the lower disc cutter 4 are shared by the adjacent shearing portions 15 and 16. It is said. Therefore, except for both ends in the width direction, an arbitrary set of the upper disk cutter 3 and the lower disk cutter 4 belongs to both the first shearing portion 15 and the second shearing portion 16.

Further, in this slitting apparatus, the first rotating roll 17 is disposed between the upper disk cutter 3 of the first shearing section 15 and between the lower disk cutter 4 of the second shearing section 16, and the first shearing section 15. A second rotating roll 18 is disposed between the lower disk cutter 4 and between the upper disk cutter 3 of the second shearing portion 16.
These rotary rolls 17 and 18 have an outer diameter of the upper disk cutter 3 and the lower disk cutter 4 as A (mm), an overlap dimension of the upper disk cutter 3 and the lower disk cutter 4 as B (mm), and a copper strip. When the thickness of 1 is T (mm), the outer diameter of the first rotating roll 17 is C (mm), and the outer diameter of the second rotating roll 18 is D (mm), the following relationship holds: Designed to.
(1) {A−2 (T + B)} ≦ C ≦ {A−2 (0.5T + B) +1}
(2) (A + 0.3T) ≦ D ≦ (A + 0.3T + 1)

When the outer diameter C (mm) of the first rotating roll 17 is less than {A-2 (T + B)}, it adversely affects the shearing process and it is also difficult to suppress positional fluctuation. When the outer diameter C (mm) of the first rotating roll 17 exceeds {A−2 (0.5T + B) +1}, it becomes easy to cause bending deformation and position variation.
When the outer diameter D (mm) of the second rotating roll 18 is less than (A + 0.3T), it becomes easy to cause bending deformation and position fluctuation. When the outer diameter D (mm) of the second rotating roll 18 exceeds (A + 0.3T + 1), the shearing process is adversely affected. In this case, the second rotating roll 18 is pushed by the copper strip being sheared and bent, and is disposed radially inward from the cutting edge of the disk cutter on the shearing surface.
In both the above-mentioned formulas (1) and (2), “+1” is on the right side because the inner diameter of the rotary roll may be larger than the outer diameter of the spacer in the range up to 1 mm.
It is preferable that both ends of the first rotating roll 17 and the second rotating roll 18 are in surface contact with the upper disk cutter 3 or the lower disk cutter 4.

  The blade edges of each of the disk cutters 3 and 4 have an angle θ of 5 between the flat portion 21 whose contact angle with the copper strip 1 is 0 ° and the copper strip 1 formed on the extension line of the flat portion 21. It is set as the partial taper blade edge part 23 which consists of the inclination part 22 which is -30 degrees. In this case, when the width of the flat portion 21 is X (mm) and the width of the inclined portion 22 is Y (mm), X / (X + Y) is 0.45 to 0.78. When X / (X + Y) is less than 0.45, the life of the cutting edge tends to be shortened, and when it exceeds 0.78, surface scratches are likely to occur, and the effect of reducing the angle of the edge portion and the occurrence of lateral burrs is obtained. It tends to fall slightly. X + Y is the full width (thickness) of the partially tapered blade edge portion 23.

As the copper strip 1 cut by this slitting device, copper or a copper-based alloy having a thickness of 0.7 mm to 2.5 mm and a Vickers hardness of 50 HV to 130 HV is applied.
The copper strip 1 having a Vickers hardness of 50 to 130 HV and a thickness of 0.7 to 2.5 mm is made of fine copper at the partially tapered cutting edge portion 23 where X / (X + Y) is 0.45 to 0.78. When slitting to the strip 7, the thickness (X + Y) of the blade edge portion 23 of the upper disk cutter 3 and the lower disk cutter 4 is preferably 3 to 8 mm. If (X + Y) is less than 3 mm, the effect of reducing the angle of the edge portion and suppressing the occurrence of lateral burrs tends to be reduced, and the life of the cutting edge tends to be shortened. Influence the effect.
In this case, as a secondary effect, the amount of bending of the slitted thin copper strip 7 is also reduced.
Further, a clearance E of (0 to 1/3) × Tmm is defined between the upper disk cutter 3 and the lower disk cutter 4 of each set, where T is the thickness of the copper strip 1 to be cut. It is provided along the axial direction.

  A pair of pressing rolls 6 are provided across the passage of the copper strip 1, and in the thickness direction across the copper strip 5 that has been sheared by the upper disc cutter 3 and the lower disc cutter 4. By pressing, the copper strip 5 sheared to the middle of the plate thickness is completely separated and cut into a plurality of fine copper strips 7.

In order to slit the copper strip 1 into a plurality of thin copper strips 7 by the slitting device configured as described above, the upper strip cutter 3 and the lower disc are used to cut the copper strip 1 fed from the unwinding rotating device 2. Shearing is performed between the cutter 4 and the cutter 4. FIG. 1 shows the state during the shearing process, and the copper strip 5 is sheared to the extent that it is not completely separated in the thickness direction.
Next, the copper strip 5 subjected to the shearing process is passed between a pair of pressing rolls 6, whereby the copper strip 5 is pressed in the thickness direction by the pressing rolls 6 and completely separated and cut. The sheared copper strip 5 is passed between the pressing rolls 6 to become a plurality of fine copper strips 7. Finally, these thin copper strips 7 are wound up by a winding rotating device 8.

In this slitting-free slitting method, by providing the rotating rolls 17 and 18 made of an elastic body between the disk cutters 3 and 4, deformation and fluctuation of the copper strip 1 during slitting are prevented, surface scratches, It is possible to effectively suppress the occurrence of sagging on the fracture surface side and occurrence of lateral burrs.
As shown in FIG. 7, when a rotating roll is not provided between the disc cutters 3 and 4, the copper strip 1 sheared by the upper disc cutter 3 and the lower disc cutter 4 is the first shear portion 15. Then, bending deformation and position fluctuation in the upward direction are easily caused, and bending deformation and position fluctuation in the downward direction are likely to occur in the second shearing portion 16, which may cause surface flaws, dripping on the fracture surface side, and horizontal burrs.
Therefore, by installing the first rotating roll 17 and the second rotating roll 18, it is possible to suppress bending deformation or position fluctuation in the upward or downward direction. By making the material of the 1st rotation roll 17 and the 2nd rotation roll 18 into the elastic body, the deformation stress of the copper strip 1 is absorbed moderately, and the surface is not damaged.
In this case, the first rotating roll 17 and the second rotating roll 18 that rotate in synchronization with the upper disk cutter 3 and the lower disk cutter 4 do not need to be rolls integrated between the disk cutters 3 and 4. As shown in FIG. 6, you may consist of the narrow plate-shaped rotary roll 25 which consists of several rubber-like elastic body rings installed in the both ends and center part between the disk cutters 3 and 4. As shown in FIG.

In this burr-free slitting method, the angle between the flat portion 21 having a contact angle with the copper strip 1 of 0 ° and the copper strip 1 formed on the extension line of the flat portion 21 is 5 to 30. When the upper disk cutter 3 and the lower disk cutter 4 are used as the partial taper blade edge portion 23 composed of the inclined portion 22 at an angle, the life of the blade edge portions of the upper disk cutter 3 and the lower disk cutter 4 is extended and slitted. Further, it is possible to suppress the generation of surface scratches on the thin copper strip 7, the dripping on the fracture surface side, and the generation of lateral burrs.
In addition, in the case of the cutting edge described in Patent Document 1 that does not have a flat part, polishing work is required one by one when polishing by abrasion or the like, but in the case of the partially tapered cutting edge part of the present invention, the flat part is aligned. Thus, a plurality of sheets can be polished simultaneously, and the polishing cost can be reduced.
In addition, as long as the effect of the flat part and inclination part in this partial taper blade edge part arises, it is good also as a shape which connected the corner | angular part between these flat parts and inclination parts by a slight arc surface.

A copper thin plate is manufactured by subjecting an oxygen-free copper (purity 99.99 wt% or more) cast ingot made by Mitsubishi Materials Corp. to hot rolling, intermediate cold rolling, and annealing in this order. Cold rolling and final annealing were performed to produce a copper strip (length 2000 mm × width 550 mm) having the Vickers hardness and thickness shown in Table 1.
Next, these copper strips were cut with a slitting apparatus without burr using the disk cutter and rotating roll shown in Table 1, and the thin copper strips of Examples 1 to 8 (length 2000 mm × width) 50 mm) were produced for each 10 sheets. In addition, as a comparative example, 10 thin copper strips (length 2000 mm × width 50 mm) were produced for each without using a rotating roll.
In addition, the blade edge | tip part of the disk cutter of Examples 1-6 and a comparative example was formed in the taper blade edge | tip part. Example 7 is a tapered cutting edge part having no flat part, and Example 8 is a flat cutting edge part having no inclined part. Moreover, in Table 1, the inclined part angle is an angle between the inclined part and the copper strip.

For each of these 10 fine copper strips, the width of occurrence of surface scratches, surface roughness (Ra, Rz, Rq), edge angle, lateral burr height, bending amount are measured, and the average value is a representative value. It was.
As for the generation width of the surface flaw, the surface flaw generated in the fine copper strip was visually confirmed, and the width dimension was measured.
The surface roughness Ra, Rz, and Rq are measured with the laser light on the surface of the sample cut out from the thin copper strip using a scanning confocal laser microscope LEXT OLS-3000 manufactured by Olympus Corporation under the condition of 100 times the objective lens. After irradiation, the distance was measured from the reflected light, and the distance was continuously measured while linearly scanning the laser light along the surface of the sample.
The edge portion angle is defined as an angle with respect to a virtual vertical plane when the end of the fine copper strip is not perpendicular to the main surface of the fine copper strip, and as shown in FIG. The band plate 7 was sandwiched and fixed between the support bases 31 so that the edge portion faced upward, and the contour shape of the fine copper band plate edge portion was traced with a needle and measured. In FIG. 8, the angle α between the straight line PQ connecting the tips P and Q of the thin copper strip edge and the straight line extending from Q in the horizontal direction is measured from the contour shape. The smaller the edge portion angle α is, the smaller the shear on the fracture surface side is.
The horizontal burr height is obtained by tracing the contour shape of the thin copper strip edge portion with a needle and converting it into an electrical signal, and outputting the result from the flat portion 32 in the contour shape shown in FIG. The height (h in FIG. 9) was measured.
The amount of bending was obtained by actually measuring the amount of bending per 2000 mm length of the fine copper strip.
In addition, the life (durability) of the partially tapered blade edge is determined by repeatedly performing the same cutting, surface scratch generation width, surface roughness (Ra, Rz, Rq), edge angle, lateral burr height, bending amount. The cutting length of the copper strip until it deteriorated was defined as the life.
These measurement results are shown in Table 2.

From these results, it can be seen that the burr-free slitting apparatus provided with the rotating roll of the example significantly suppresses the generation of surface scratches, dripping on the fracture surface side, and occurrence of lateral burrs.
Moreover, the inclined part whose angle between the flat part whose contact angle with the copper strip is 0 ° and the copper strip formed on the extension line of the flat part is 5 to 30 ° at the cutting edge of the disk cutter It can be seen that the service life is extended by the “no burr” slitting method and apparatus of the copper strip using the partially tapered cutting edge portion consisting of
In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the meaning of this invention.

DESCRIPTION OF SYMBOLS 1 Copper strip 2 Unwinding rotary device 3 Disc cutter 3 Upper disc cutter 4 Lower disc cutter 5 Copper strip 6 Pressing roll 7 Fine copper strip 8 Winding rotary device 11 Shaft 13 Spacer 15 1st shear part 16 2nd Shearing part 17 1st rotation roll 18 2nd rotation roll 21 Flat part 22 Inclination part 23 Partial taper cutting edge part 23 Cutting edge part 25 Plate-shaped rotation roll

Claims (10)

  Unwinding and rotating device for feeding the copper strip, a plurality of upper disc cutters and lower disc cutters that shear the copper strip to the extent that it is not completely separated in the thickness direction, and the shear processing is performed A slip roll that presses the copper strip in the thickness direction and completely separates and cuts it, and a winding rotary device that winds up the separated and cut copper strip, and cuts the copper strip in the longitudinal direction. A plurality of upper disc cutters and lower disc cutters in the width direction of the copper strip, the first shearing unit comprising a combination of an upper disc cutter, a lower disc cutter, a lower disc cutter, and an upper disc cutter in this order. The lower disk cutter, the upper disk cutter, the upper disk cutter, and the second shearing part composed of the combination of the order of the lower disk cutter are alternately arranged adjacent to each other, and a pair of upper disk cutters between the adjacent shearing parts. And the lower disk cutter The rotating rolls made of an elastic body that is in contact with the surface of the copper strip during the shearing process are provided between the upper disk cutters and between the lower disk cutters, respectively. A stripping device for copper strips. The rotating roll includes a first rotating roll disposed between an upper disc cutter of the first shearing portion and a lower disc cutter of the second shearing portion, and a lower disc cutter of the first shearing portion and A second rotating roll disposed between the upper disc cutters of the first shearing portion, and the outer diameters of the upper disc cutter and the lower disc cutter are A (mm), and the upper disc cutter and the lower disc cutter The overlap dimension is B (mm), the thickness of the copper strip is T (mm),
When the outer diameter of the first rotating roll is C (mm) and the outer diameter of the second rotating roll is D (mm), {A-2 (T + B)} ≦ C ≦ {A-2 (0 5T + B) +1}, and (A + 0.3T) ≦ D ≦ (A + 0.3T + 1). The copper strip stripping device according to claim 1, wherein:   The cutting edge portions of the upper disc cutter and the lower disc cutter have an angle between a flat portion whose contact angle with the copper strip is 0 ° and the copper strip formed on an extension line of the flat portion is 5 to 5. The slitting device for a copper strip according to claim 1 or 2, wherein the slitting device is a partially tapered cutting edge portion including an inclined portion of 30 °.   The width of the flat part is X (mm) and the width Y of the inclined part is Y (mm), and X / (X + Y) is 0.45 to 0.78. Slitting device for copper strip.   The copper strip has a Vickers hardness of 50 to 130 HV, a thickness of 0.7 to 2.5 mm, and a thickness (X + Y) of a cutting edge portion of the upper disk cutter and the lower disk cutter is 3 to 8 mm. The slitting device for a copper strip according to claim 4.   In the slitting method in which a plurality of upper disc cutters and lower disc cutters are pressed on the upper and lower sides of the copper strip, shearing is performed to such an extent that they are not completely separated, and they are completely separated and cut by pressing with a roll. The cutter and the lower disk cutter are: a first shearing part comprising a combination of an upper disk cutter, a lower disk cutter, a lower disk cutter, and an upper disk cutter in the width direction of the copper strip, a lower disk cutter, an upper disk cutter, The second shearing part consisting of the combination of the upper disk cutter and the lower disk cutter in order is alternately arranged adjacent to each other, and a pair of the upper disk cutter and the lower disk cutter are shared by the two adjacent shearing parts. A copper strip that is in a state and is in contact with the surface of the copper strip during shearing a rotating roll made of an elastic body provided between the upper disc cutters and between the lower disc cutters Slitting method.   The rotating roll includes a first rotating roll disposed between an upper disc cutter of the first shearing portion and a lower disc cutter of the second shearing portion, and a lower disc cutter of the first shearing portion and A second rotating roll disposed between the upper disc cutters of the first shearing portion, and the outer diameters of the upper disc cutter and the lower disc cutter are A (mm), and the upper disc cutter and the lower disc cutter The overlap dimension is B (mm), the thickness of the copper strip is T (mm), the outer diameter of the first rotating roll is C (mm), and the outer diameter of the second rotating roll is D (mm). ), {A−2 (T + B)} ≦ C ≦ {A−2 (0.5T + B) +1}, and (A + 0.3T) ≦ D ≦ (A + 0.3T + 1). The method for slitting a copper strip according to claim 6.   The cutting edge portions of the upper disc cutter and the lower disc cutter have an angle between a flat portion whose contact angle with the copper strip is 0 ° and the copper strip formed on an extension line of the flat portion is 5 to 5. The method for slitting a copper strip according to claim 6 or 7, wherein the slitting portion is a partially tapered cutting edge portion including an inclined portion of 30 °.   The width of the flat part is X (mm), and the width Y (mm) of the inclined part is X / (X + Y) is 0.45 to 0.78. Slitting method for copper strip. The copper strip has a Vickers hardness of 50 to 130 HV, a thickness (T) of 0.7 to 2.5 mm, and a thickness (A + B) of the cutting edge of the upper disc cutter and lower disc cutter of 3 to 8 mm. The method of slitting a copper strip according to claim 9.

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