JPH01321114A - slitting device - Google Patents

Abstract

PURPOSE:To enhance the surface quality generated by a slit device to perform cutting of a band material by permitting the side faces of the upper slit cutting edges of No.1 and No.2 slit means to make surface contact partially with the side faces of lower slit cutting edges of these slit means. CONSTITUTION:A band material 2 is fed into a gap (g) between an upper and a lower slit cutting edge 1a, 1b, and a specified shearing force is applied to this band material 2 to cut it on half way. Then the band material 2 is automatically fed to between other slit cutting edges 1c, 1d rotating in conjugation, and a shearing force opposite to the one given by the first named slit cutting edges 1a, 1b to cause complete cutting of the semi-cut part as mentioned above. Applying the oppositely directed shearing forces alternately in this fashion should suppress generation of residual stress and/or burrs, which together with conjugate provision of the two pairs of slit cutting edges 1a, 1b and 1c, 1d in surface contact with each other by their side faces, will facilitate alignment of the shearing force applying position. Thus the cut band material can be equipped with an enhanced surface quality.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a slitting device, and in particular, it is capable of cutting a strip by suppressing the occurrence of residual stress, burrs, etc., and eliminating misalignment of the shearing force application position. This invention relates to a slitting device.

[Conventional technology]

Conventionally, when cutting metals, non-metals, etc., a slitting device as shown in FIG. 4 has been used. This has a pair of shafts (not shown) with slit blades 1a and 1, respectively.
The slit blades 1a and 1b are fixed at different positions in the rotational axis direction by the thickness of the slit blades 1a and 1b.

The strip plate 2 is cut into two strips 2 by passing the strip plate 2 through the interlocking portion of 1b in the direction of the arrow. Moreover, FIGS. 5(a) and 5(b) show a plurality of slit devices shown in FIG. 4 arranged in the direction of the rotation axis. That is, a plurality of slit blades 1a, 1b are inserted into the pair of shafts 5a, 5b with a wide sleeve 3 and a narrow sleeve 4 interposed therebetween, and the positions of the slit blades 1a, 1b are alternately different. ing. For this reason, multiple slit blades 1aS
lb makes it possible to cut multiple strips at the same time. However, with this cutting method, residual stress occurs at the cut surface of the strip and its vicinity, which may cause deformation if the strip has low rigidity.For example, after a semiconductor lead frame material is stamped, This is the deformation that occurs, and even if the lead frame material has high rigidity before stamping and maintains flatness against residual stress near the cut surface, if the rigidity decreases after stamping,
The lead frame material deforms due to residual stress. This causes quality problems. In addition, burrs appeared on the appearance, and when the slit strip was wound into a coil, there was a risk of damaging the surface of the slit strip, and this also became an obstacle in the process of sending it to stamping.

Therefore, counter cutter methods, roll slit methods, and the like have been proposed to solve the problems of residual stress, burrs, and the like.

FIGS. 6(a), (b), (C), and (b) show the counter cutter method. (a), Φ) show the first stage slitting device which is the first step, and the upper shaft 5a is shown in FIG. The fixed slit blade 1a and the slit blade 1b fixed to the lower shaft 5b are offset in the direction of the rotation axis and have a predetermined gap g between them. Cut plate 2 in half so that it does not separate completely. Also,
(C) and (B) show the second stage slitting device, which is the second step, and the slitting blade 1c fixed to the shafts 5c and 5d.
Sld applies a shearing force in the opposite direction to the half-cut strip 2 sent from the previous slitting device to completely separate the strip 2. The strips cut by this method have no burrs, and the residual stress generated during slitting is also small.

Figure 7 (a), (b), (C), (a), (e), (f
) shows the roll slit method, (a), Φ) shows the first
Showing the slitting device in the first stage of the process (upper shirt)
The slit blade 1a inserted into the slit blade 5a and the lower shaft 5
The slit blade 1b inserted into the slit blade 1b is offset by the thickness of the slit blade in the direction of the rotation axis, and there is a predetermined gap g therebetween. Therefore, when the strip plate 2 is sandwiched, the strip plate 2 is cut in half without being completely separated.

In addition, (C) and (B) show the start state of the second process, in which the strip plate 2 cut in half by the slitting device in the previous stage is fed into the flat rolls 6a and 6b provided in the upper and lower pairs. . Furthermore, (e) and (f) show the completion state of the second step, in which the half-cut strip 2 is rolled between a pair of flat rolls 6 a
The strips 2 are completely separated by crushing with s 6 b. The slit strip cut by this method has no burrs, and the residual stress generated during slitting is small.

[Problem to be solved by the invention]

However, the counter cutter method and roll slit method described above have the following problems.

(1) Counter cutter method The slit blade of the front-stage slitting device and the slit blade of the rear-stage slitting device cannot be properly aligned, that is, the shear force application position of the front-stage slitting device and the shearing force of the rear-stage slitting device cannot be achieved. It is very difficult to precisely match the force application position in the shaft direction. Furthermore, even if this positional alignment is achieved, when moving the strip from the front slit device to the rear slit device, it is necessary to guide the strip so that the shearing force application position does not change, and this is because the thickness of the strip The smaller the size, the more difficult it is with current technology.

(2) Since the strip is crushed by the flat roll with roll slits, there is a risk that the surface of the strip may be damaged due to friction or foreign matter adhering to the roll.

This causes problems with the surface quality of the cut strips.

Therefore, it is an object of the present invention to suppress quality defects such as residual stress and burrs, and to easily cut strips without being limited by the technical level such as alignment of shearing force application positions. The purpose of the present invention is to provide a slitting device that can do the following.

Another object of the invention is to provide a slitting device that improves the surface quality of the strip.

[Means to solve the problem]

In order to achieve the above-mentioned objects, the present invention includes a pair of upper and lower slit blades whose positions are different in the axial direction by at least the thickness of the slit blades, and a pair of upper and lower slit blades that are positioned in the opposite direction to the slit blades by the thickness. To provide a slitting device in which a pair of upper and lower slitting blades having different blades are brought into surface contact with each other in part.

That is, the slitting device of the present invention includes a first slitting means and a second slitting means, and the first slitting means has a pair of upper and lower slits whose positions are different in the axial direction by the thickness of the slit blade. It is a slitting blade, and by passing the band plate between them and sandwiching it, a predetermined shearing force is applied to the band plate to cut it in half. On the other hand, the second slit means is a pair of upper and lower slit blades whose positions are different by the thickness in the opposite direction to the first slit means in the axial direction,
By passing the half-cut strip between both slit blades and sandwiching it, the shearing force of the first slit means and the opposite shearing force are applied to cut the half-cut strip. Further, a second slit means is arranged behind the first slit means,
and the side surface of the upper slit blade of the first slit means and the side surface of the upper slit blade of the second slit means are the same as the side surface of the lower slit blade of the first slit means and the side surface of the lower slit blade of the second slit means. are in contact with each other.

[Effect]

When the strip is moved and fed to the first slit means and is sandwiched between the pair of upper and lower slit blades, the strip is cut in half by receiving a predetermined shearing force. This half-cut strip is fed to a pair of upper and lower slit blades of a second slit means connected to the first slit means, and is sandwiched there. At this time, a shearing force opposite to the shearing force applied by the first slit means is applied to the half-cut strip, and the half-cut portion of the strip is completely cut. In this way, by applying shearing force alternately, it is possible to suppress the introduction of residual stress and the occurrence of burrs, and also by bringing part of the first slit means and the second slit means into surface contact. Since they are arranged in series, it is possible to eliminate the difficulty and trouble of aligning the shearing force application position, and it is possible to cut the strip while maintaining the quality of the strip.

〔Example〕

Hereinafter, the slitting device of the present invention will be explained in detail.

1(a) and (6) show an embodiment of the present invention, in which slit blades la and lb fixed to a pair of upper and lower shafts 5a and 5b via sleeves 10a and 10b are slit blades in the shaft axial direction. By passing the band plate 2 appropriately between the slit blades 1a and 1b and sandwiching it between the slit blades 1a and 1b, a predetermined shearing force is applied to the band plate 2. The slit blades 1a and 1b have a small gap g between them, and the strip plate 2 is cut in half by receiving a predetermined shearing force from both the slit blades 1a and 1b. Further, a sleeve 10c is attached to the pair of upper and lower shafts 5c and 5d.

Slitting blade 1c fixed via 10d.

The position of ld is different from the position of the slit blades la and lb by the same distance in the opposite direction in the shaft axial direction,
Slit blade 1a s between slit blade 1c and 1d
The strip plate 2 is cut in half by applying a shearing force opposite to the predetermined shearing force applied by the slit blades 1a-, 1b by passing the strip plate 2 cut in half by the slit blades 1b and sandwiching the strip plate 2.
completely separate. Slit blades 1c and ld are arranged behind the slit blades la and lb, and the slit blade 1a
The side surface IA of the slit blade 1c and the side surface IC of the slit blade 1c rotate while the side surface IB of the slit blade 1b and the side surface ID of the slit blade 1d are in surface contact with each other.

The present invention will be explained in detail below.

First, the strip plate 2 is moved in the direction of the arrow and fed into the gap g between the rotating slit blades 1a and lb, and a predetermined shearing force is applied to the strip plate 2 to cut it in half. This half-cut strip plate 2 is automatically sent to the slit blade IC11d which is connected to the slit blade 1a s 1b and rotates. As a result, the slit blade 1a is attached to the half-cut strip plate 2.
, 1b is applied to completely cut the half-cut portion by applying a shearing force opposite to that applied by 1b. By applying shearing force alternately in this way, the occurrence of residual stress, burrs, etc. can be suppressed, and the slit blades 1 a s 1 b and slit blades 1 c and ld are connected in series with their sides in surface contact. Save,
Difficulties and troubles such as alignment of shearing force application positions can be eliminated.

Note that the material for the band plate applicable to the present invention is not particularly limited, and may be any general material such as metals and non-metals.

FIGS. 2(a) and 2(b) show an application example of the above-mentioned slitting device, in which slit blades 1a, lb, lc, and ld are connected to shafts 5a, 5b, and 5C15d through wide sleeves 3 and narrow sleeves 4, respectively. It is arranged to accommodate multiple units.

That is, slit blades 1a, 1b, 1cs
1 d and the next slit blade 1a11bs lc, ld
are arranged in order so that the positional relationship is reversed. However, d+ = d* = ds = d4.

By passing the strip through such a slitting device, it is possible to simultaneously cut the strip into a plurality of strips (four in the embodiment).

FIG. 3 shows a modification of the present invention, in which a slit blade 11 is provided by cutting the surface of a roll 10 having a shaft 49. That is, by polishing the flat roll 10 and carving out a desired position, the roll is provided with a step.

Similar effects can be achieved with this slit device. Furthermore, assembly is easier than in the slitting apparatus shown in FIGS. 1 and 2.

〔Effect of the invention〕

As explained above, in the axial direction, there is a pair of upper and lower slit blades whose positions differ by at least the thickness of the slit blades, and a pair of upper and lower slit blades whose positions differ by the thickness in the opposite direction to the slit blades. Since a part of the blade is in surface contact with the slitting blade, the occurrence of residual stress, burrs, etc. can be suppressed, and alignment of the shearing force application position can be easily achieved without being restricted on a technical level. Furthermore, since no roll means with a smooth surface is used, the surface quality of the strip does not deteriorate.

[Brief explanation of the drawing]

FIGS. 1(a) and 1(b) show an embodiment of the present invention, and (a)
) is a side view, (b) is a front view, Figs. 2 (a) and (b) show examples of its application, (a) is an overall perspective view, (b) is a front view, and Fig. 3 is its modification. An explanatory diagram showing an example, FIG. 4(a),
(b) shows a conventional slitting device, (a) is a side view,
Figures 5(a) and 5(b) show an example of its application; (a) is an overall perspective view, (c) is a front view, and Figure 6(a) is a front view.
), (b), (C), (b) show the counter cut method, (a), (a) are the front view and side view of the first step,
(C) and (d) are the front and side views of the second step, and the seventh step.
Figures (a), (b), (C), (d), (e), and (f) show the roll slitting method, and (a) and (b) are front and side views of the first step, (C) and (d) are a front view and a side view of the second step. Explanation of symbols: la, 1b, IC, 1d------
------Slit blade 1A, IB, IC, ID ・・・・−・−・Slitting blade side 2−・−・−−−−−・−・Strip plate 3−・−−−−−1 --- Wide sleeve 4 ----- Narrow sleeve 5 a, 5 b, 5 c, 5 d ---
---------Shaft 6a, 6b-------Ippei roll 10----Sleeve

Claims (2)

[Claims] (1) Cut the strip in half by applying a predetermined shearing force to the strip by passing it between a pair of upper and lower slit blades whose positions differ by at least the thickness of the slit blade in the axial direction. and a pair of upper and lower slit blades whose positions are different in opposite directions by the thickness in the axial direction. a second slit means for applying a shearing force opposite to the shearing force to cut the half-cut portion of the half-cut strip; The side surface of the upper slit blade of the second slit means rotates while the side surface of the lower slit blade of the first slit means and the side surface of the lower slit blade of the second slit means are partially in surface contact with each other. A slitting device featuring: (2) The first and second slitting means are arranged with a plurality of pairs of upper and lower slitting blades in the axial direction to simultaneously cut one strip into a plurality of strips. Slitting device.