JPS61125718A - Method for cutting band type material and its device - Google Patents

Abstract

PURPOSE:To enable cutting without generating burr, shear droop or layer peel- off on a cut face by making a groove bottom thinner by carving parallel grooves in the longitudinal direction on opposite positions of both faces of a band type material and shearing inside the grooves. CONSTITUTION:When a band type material 8 is put into a roller pair 17, shallow V-shape grooves 8a, 8b are carved on opposite positions of both upper and lower faces of the band type material 8 with an annular cutting edge 26a of an upper roller 26 and an annular cutting edge 29a of a lower roller 29. And when the band type material 8 is put into a roller pair 18, a V-shape groove 8c whose depth and width are expanded is formed on the upper face by an annular cutting edge 27a o an upper roller 27, but the V-shape groove 8b is not expanded by the roller pair 18 and kept in size which is made in passing the roller pair 17. When the band type material 8 is put into a roller pair 19 finally, the V-shape groove 8b of the lower face of the material 8 is expanded by an annular cutting edge 31a of a lower roller 31, and a portion 8e of groove bottoms of the V-shape grooves 8b, 8c which is made thinner can be cut without generation of burr and shear droop with a tip of the annular cutting edge 31a.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a method and apparatus for cutting a strip of material, and in particular to a method and apparatus for cutting a strip of material, particularly for cutting a strip of material made of two or more layers of different materials and cutting the material into small pieces. The present invention relates to a method and apparatus for manufacturing narrow strip plates that serve as the base material for oil-free plain bearings.

BACKGROUND OF THE INVENTION Conventionally, oil-free compact flat bearings with small diameters and short lengths have been manufactured using the following process. In other words, a wide strip made of a laminate of a metal layer with anti-corrosion plating and a sintered alloy layer (or other materials such as plastic materials) is cut parallel to its longitudinal direction to create a narrow strip. After manufacturing the zonules,
Cutting the small band-like body into a predetermined length to form a rectangular plate,
The plate is bent in its longitudinal direction to form a cylindrical body, and the joint portion of this cylindrical body is welded or the bearing is formed without welding.

In the manufacturing process as described above, when cutting a wide strip material in the longitudinal direction, a known roller type slitter has conventionally been used.

The twelfth factor shows the schematic structure of a known roller-type slitter, in which 1 is a frame-shaped frame, 2 is an upper roller supported horizontally by the frame 1 via bearings at both ends, and 3
j) is a lower roller disposed parallel to and close to the upper roller 2 and supported by the frame 1 via bearings at both ends. A collar-shaped or disc-shaped (or ring-shaped) cutting edge 4 is provided on the upper roller 2 at a predetermined gap along its axial direction so as to protrude from the outer peripheral surface of the upper roller 2. The fixed position of 2 can be adjusted in the vertical direction by rotating an operating knob 6 of a lifting screw 5 connected to bearing boxes (not shown) at both ends of the upper opening 22. On the other hand, the lower roller 3 has a stepped shaft structure with multiple short small diameter portions 3a corresponding to the blade thickness trap of the cutting blade 4 of the upper roller 2.
A disk-shaped cutting blade 7 is attached to the end face of both ends of the small diameter portion 3a in close proximity to the side surface of the cutting blade 4 of the upper roller 2. When dividing a strip material into narrow strips, before starting operation, first rotate the operating knob 6 to adjust the fixing position of the upper opening 22 with respect to the lower roller 3, and then The roller gap between the upper and lower rollers is set to match the thickness of the strip material, and the tip of the cutting blade 4 of the upper roller is set to enter between the cutting blades 70 of the lower roller. After the positioning of the upper opening (=) 2 is completed in this way, the driving device for the upper roller 2 and the lower roller 3 is started to rotate the upper roller 2 and the lower roller 3 in opposite directions, and in this state, 8 tons of strip material
- When feeding between the upper and lower rollers, the relative movement between the cutting blade 4 of the upper roller 2 and the cutting blade 7 of the lower roller 3 (the cutting blade 4 and the cutting blade 7 move in opposite directions) causes both Since a shearing force is generated between the cuts, the strip material 8 is sheared parallel to its longitudinal direction, and is also bitten between the outer peripheral surfaces of the upper and lower rollers and fed in the longitudinal direction. As a result, from now on, the strip material 8
The strip material 8 is automatically sheared to the rear end, and the strip material 8 is divided into a plurality of narrow strips 9. Problems with the Prior Art The cutting method using the known roller-type slitter as described above has the following. There were problems like.

(1) Cutting is performed by applying a sudden shearing force, which tends to cause cracks and sag on the cut surface, making it impossible to obtain a beautiful and neat cut surface. In particular, the strip, which is the basic material for oil-free bearings, is a laminate of a coating layer such as a sintered metal porous layer and a rust-proof plated back metal layer. Since the deformation rates (deformation rates) are different, the two layers tend to peel off (1). Therefore, when the strip is cut into small strips 9 using a known roller-type slitter, the side edges of the strips 9, i.e. As shown in Figure 13, the cut surface is coated with Paris 10 and Dareli.
Not only that, but also peeling 14 between the coating layer 12 and the fund Jv 113 is likely to occur due to the sagging 11. If a bearing metal is mounted using a small strip metal having such rough side edges, the dimensional accuracy of the bearing and the value of the parts will be significantly reduced. 9 on the side edge
The above-mentioned repeated defects were removed by chamfering as shown at point $15 in Figure 3. However, a phenomenon has occurred in which minute chips scattered during chamfering adhere to the coating layer of the strip-shaped body and penetrate into the coating layer, reducing the lubrication performance and durability of the bearing. Even with chamfering, it was not possible to completely restore the functionality. Furthermore, since the chamfering process is performed, there is a problem in that the manufacturing cost of the bearing increases.

(2) If all cutting is done with a known roller type slitter,
Since a layer material having a width equal to the thickness of the cutting edge 4 of the upper roller 2 is produced, the material efficiency is poor, and this is one reason for increasing the cost of the bearing.

Problems to be Solved by the Invention It is an object of the present invention to solve the above-mentioned problems and to provide a novel cutting method and device capable of obtaining a frenulum-shaped body having beautiful and neat side edges. More specifically, it is an object of the present invention to provide a method and apparatus that can perform cutting without causing any cracks, sag, or layer peeling on the cut surface.

Summary of the Invention The method of the present invention completely eliminates the conventional method of applying sudden shear force to the strip material between two cutting blades moving in opposite directions, and cuts the strip material along the planned cutting line. After the strip material is sufficiently thinned locally, the thinned portion is sheared to obtain a t% mark. More specifically, in the method of the present invention, grooves parallel to the longitudinal direction of the strip material are carved at opposing positions on both sides of the strip material, and the strip material at the bottom of the groove is cut. After the wall has been made sufficiently thin, the thin part is cut from one side of the strip using a blade inserted into the groove. It is characterized by manufacturing.

In one embodiment of the method of the present invention, a pair of rollers is formed by arranging rollers t-2 in parallel with each other, each roller having an annular blade (or a flange-like protrusion) having a V-shaped or wedge-shaped cutting edge in cross section. , the roller pairs are arranged in tandem at least in two or more stages to create a pressure TA iso-type cutting device! i1, and while the strip material is passed from the first pair of rollers to the last pair of rollers, a deep continuous V-shaped # is created at opposing positions on both sides of the strip material, and then According to the method of the present invention, the strip material is cut along the groove in the step of passing it through a pair of corrugated rollers.The method of the present invention allows the strip material to be cut without causing any cracks or sag on the cut surface.〇-Invention Embodiments of the present invention will now be described with reference to FIGS. 1 to 7. FIG. 1 is a schematic side view of a first embodiment of a cutting device for carrying out the method of the present invention. be. In the figure, reference numeral 16 denotes a frame (a). Three pairs of rollers 17 to 19, first, second, and third, are arranged in tandem on this frame 16, and the strip material 8 to be cut is 10 rollers vs. 17
The sheet is passed from the roller gap between the upper and lower rollers to the roller gap of the third roller pair 19 in the direction of arrow f in the figure. The bearing boxes 20, 21 (chocks) of the upper and lower rollers belonging to each roller pair 17 to 19 are supported so as to be movable up and down with respect to the frame 16 so that the fixed position tt can be adjusted in the vertical direction. Bearing 20.21 is lifting screw rod 2
2.23, and the lifting screw rod 22.23 has an operation handle 2 for raising and lowering each bearing box 20.21t.
4.25 is installed. Each roller pair 17~19t
- Constituent upper rollers 26 to 28 and lower opening - 229 to 31
As shown in FIGS. 2 to 7, each roller has annular blades (or rib-like protrusions) 26a to 31at with a completely blind V-shaped or wedge-shaped cutting edge at the same position in the axial direction, When the strip material 8 is passed between the upper and lower rollers of each pair of rollers, the annular blades 26 &~28a of the upper roller and the annular blades 29a-31a of the lower roller are simultaneously moved (at opposing positions on both the upper and lower surfaces of the strip material 8). As a result, continuous grooves with a substantially V-shaped cross section extending in the longitudinal direction of the strip material 8 are carved in corresponding positions on both the upper and lower surfaces of the strip material 8. When the strip material 8 passes through the pair of rollers 19, it forms a small strip 9AK with a width between the annular blades 28ax 31a of each roller.
In order to cut and divide, the protruding heights and widths of the annular blades 26a to 31a of the upper and lower rollers of the first to third roller pairs are set to different dimensions as shown in FIGS. 5 to 7. It is configured. That is, as shown in FIG.
&, It is formed with an extremely small protrusion height that is only engraved with 8bi. Further, as shown in FIG. 6, the annular blade 27a of the upper roller 27 of the second roller pair 18 is formed to have several times the height and width of the annular blade 26m of the upper roller 26 of the first roller pair 17. Therefore, when the strip material 8 passes through the first roller pair 17 and is bitten by the second roller pair 18, the VN groove 8a on the upper surface of the strip material 8 is aligned with the upper opening of the second roller pair 18. -227 annular blade 27a carves wider and deeper into the upper surface of the strip material 8 (has a wide and deep V shape).
8c is formed〇Meanwhile, the lower end-2 of the second roller pair 18
The dimensions of the annular blade 3Qa of the first roller pair 17 are the same as the dimensions of the annular blade 29a of the lower roller 29 of the first roller pair 17, l+, so that when the strip material 8 passes through the second roller pair 18, the strip material 8
VS¥1118b on the bottom surface of is not enlarged.

Further, the annular blade 28a of the upper opening 228 of the third roller pair 19
The width and height of the second roller pair 18 are smaller than those of the annular blade 27a of the upper roller 27. Therefore, when the strip material 8 is bitten by the third roller pair 19, the third roller pair The tip of the annular blade 28a of the upper roller 28 of 19 does not contact the bottom of the V-shaped groove 8c on the upper surface of the strip material 8;
No expansion of c is performed.

On the other hand, the annular blade 31a of the lower roller 31 of the third roller pair 19
The thin uncut portions remaining at the bottoms of the corresponding V-shaped grooves 8cx8b on both the upper and lower surfaces of the strip material 8 are formed at a height that allows the gold medal to pass through. When passing, the uncut portion of the # bottom of the V-shaped groove 8d is cut from the lower surface side of the strip material 8 by the annular blade 31a of the lower roller 31.

That is, in the cutting device of the present invention having the above structure, when the strip material 8'fr is passed through the first pair of rollers 17,
As shown in FIG. 5, the annular blade 26a of the upper opening 226 and the annular blade 29a of the lower roller 29 cut shallow V-shaped loads 8a and 8b at corresponding positions on both the upper and lower surfaces of the strip material 8. Next, when the strip material 8 is passed through the second pair of rollers 18, the annular blade 27 of the upper roller 27 as shown at 611.
aK, a V-shaped groove 8c with a further expanded depth and width is formed on the upper surface of the strip material 8. However, the second roller vs.
Since the protruding height and width of the annular blade 30 & of the lower roller 30 of 8 are the same dimensions as those of the lower q-229 of the first roller pair 17, the V formed on the lower surface of the strip material 8 in the first roller pair 17 The shaped groove 8b is not enlarged in the second roller pair 18 and is kept the same size as when the first roller pair passes.

After the strip material 8 is passed through the third pair of rollers 19,
The protruding height and width of the annular blade 31a of the lower roller 31 of the third roller pair 19 are also larger than those of the lower cooler 30 of the second roller pair 18, so the third roller at V-shape 1118b on the lower surface of the strip material 8 The annular blades a1aK of the lower rollers 31 of the pair 19 enlarge and form the thinned portions 8e of the groove bottoms of the V-shaped grooves 8b and 8c at the tips of the annular blades 31a. In this case, the protruding height and width of the annular blade 28a of the upper end 228 of the third roller pair 19 are also smaller than that of the annular blade 27a of the upper roller 27 of the second roller pair 18, so the third roller pair 19 In this case, the V-shaped groove on the upper surface of the strip material 8 is not formed.

In the method of the present invention and the cutting device t of the present invention, the thinned portion of the groove bottom is sheared by force cutting without applying a huge shearing force to the strip material all at once. A beautiful and neat cut surface can be obtained without any burrs or sagging. In particular, in the method of the present invention, the entire groove with a V-shaped cross-section is formed along the planned cutting line by an annular blade or a collar-shaped projection (or a wheel-shaped presser) having a cutting edge with a KV-shaped cross-section before cutting. When cutting a laminate having a surface coating layer, there is no fear that the surface coating layer will peel off, and the laminate can be cut in a beautiful manner.

Rust-proof plated back metal layer and sintered metal porous layer etc.
FIG. 8 shows a small strip 9At obtained by cutting a Sanso Denzo strip material consisting of II by the method and cutting device of the present invention.

As shown in the figure, the strip-shaped body 9A obtained by applying the method of the present invention has side edges (III edges) inclined in a chamfered shape, a back metal layer 13 and a covering layer 12. There was no peeling at all, and no sagging or flaking occurred. Moreover, since the groove engraving mK shell coating layer 12 before cutting is strongly pressed against the back metal layer 13 and a V-shaped groove is formed,
The coating layer 12A on the surface of the side edge is strongly pressed against the back metal layer, and a side edge in which the MA layer 12A and the back metal layer 13 are closely layered is formed. Accordingly 1, such a frenulum 9
In A, since the back metal layer is covered with the coating layer 12A also in the side edge portion, there is no fear that the back metal layer will rust, and by using the small strip 9At-, a bearing with good quality and dimensional accuracy can be manufactured. I can do it.

FIG. 9 shows a cutting device according to another embodiment of the present invention, and the cutting device of this embodiment is a two-stage device composed of a first pair of rollers 32 and a second pair of rollers 33.

The upper roller 34 and the lower end 235 of the first roller pair 32 carve shallow V-shaped grooves 8a and 8b on both sides of the strip material 8 in the same way as the first roller pair 17 of the embodiment shown in FIG. Annular blades 34a and 35at of relatively low height V-shaped cross section for
- have. Moreover, in the second roller pair 33,
V-shaped grooves 8a and 8 of the band hardwood 8 that have passed through the first roller pair 32
The lower roller 36 is provided with an annular blade 36a having an island shape that can pass through the thin bottom portion tX of bO, while the upper lower roller 37 is provided with an annular blade 37m having the same protrusion Δ length as the upper roller 34 of the first roller pair 32. .

In the cutting device shown in FIG. 9, shallow V-shapes 118a and 8
b is formed, the second roller pair 33 cuts the V-shaped groove 8b of the strip 8 from the lower surface side thereof into a deeper V-shaped groove 8dK by the annular blade 36a of the lower opening 236. The thin bottom portion of the V-shaped groove 8a is cut.

FIG. 10 shows yet another embodiment of the present invention, in which the cutting device comprises a first roller pair 38 shown in FIG. 10 and a second roller pair 38 shown in FIG. It consists of a pair of rollers 39. As is clear from the figure, in the apparatus of this embodiment, each roller pair is composed of a bladed roller with an annular blade and a smooth roller without a blade. That is, in this example, the strip material a fivJ
The upper roller 40 of the first roller pair 38 for threading the sheet is a bladed roller having a block blade 40a with a V-shaped cross section, the lower roller 41 is a smooth roller without blades, and the second roller In pair 39, the upper roller 42 is a smooth roller,
The lower roller 43 is a bladed roller having an annular blade 43a, and the annular blade 40a of the upper roller 40 of the first roller pair 38 has a blade height that reaches approximately 1/2 of the thickness of the strip material 8. Also, the lower roller 43 of the second a-, y pair 39
The blade height of the annular blade 43m is such that the first pair of rollers 38 can cut the bottom of the V-shaped groove 8a formed on the upper surface of the strip material 8.

Therefore, when cutting the strip material 8 with the cutting device shown in FIG. The strip material 8t is passed through the second pair of rollers 39, and by the block blade 43a of the lower roller 43 of the second roller pair 39, a groove of a depth reaching the V-shaped groove 8a is formed on the lower surface of the strip material 8. V-shaped groove 8c
The strip material 8 is cut into strips 9A by carving.

In any of the above embodiments, as shown in FIG. 8, it is possible to obtain a french-like body 9A in which the lateral gill part is inclined in a chamfered or wedge-shape and the N1ull lj& part is covered with a coating layer. Moreover, when cutting the small band-like body 9A from a medium-wide band-like material, no sagging or cracks occur on the cut surface, and a beautiful small band-like body with completely blind side edges can be obtained.

In the above embodiment, each roller and the annular blade were formed integrally, but as shown in FIG. may be assembled into the roller at the time of roller assembly. By manufacturing the cylindrical portion of the roller and the annular blade separately, it is possible to use a superhard material such as powdered diamond or powdered alloy for the annular blade, and it is also possible to manufacture rollers with a wider variety of designs than with an integrated roller. It is possible to easily manufacture a high-performance, inexpensive device. In addition, the 11th
When forming the annular blade 44 as shown in the figure, the blade edge angle d is 15
'' to 70 degrees, and the root portion 44a of the blade is rounded, the coating layer can be bent softly when cutting the laminate, and the effect of preventing peeling of the coating layer becomes greater.

Furthermore, if an annular blade 44 having a pointed tip consisting of two concave surfaces is used, it is possible to perform an R-chamfer on the side edge of the small band-shaped body 9A.

Effects of the Invention As explained above, the method of the present invention differs from the conventional method in which a shearing force caused by relative interlocking between two blades is rapidly applied to a strip material to cut the strip material. After the material is thinned locally along the planned cutting line, the thinned portion is sheared, so there is no breakage or sagging on the cut surface, a beautiful cut surface is obtained, and it is easy to cut the layered material. It is possible to perform all precise cutting processes without causing any damage. In addition, since the method of the present invention does not cause burrs or sagging on the cut surface, there is no need to perform burr removal, chamfering, or other processing after cutting, and the processing costs associated with cutting can be reduced. In particular, with the method of the present invention, when cutting laminates, etc., it is possible to cut without causing peeling of the coating layer coated on the surface of the base metal, etc. It can be applied to the manufacture of plain bearings, etc., and it is possible to improve the manufacturing yield and reduce the manufacturing cost of the bearings.

It should be noted that the embodiments shown in the drawings are not intended to limit the present invention, and it goes without saying that the present invention can be implemented in embodiments other than the embodiments shown in the drawings. For example, in the embodiment, only an example in which the method of the present invention is implemented using an annular blade, that is, a rotary blade, and a roller, but the method of the present invention can also be implemented using a press or the like.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a first embodiment of a cutting device for carrying out the method of the present invention, and FIGS. 2 to 4 are
ll-III and IV-IV arrow views,
FIGS. 5 to 7 are V of FIGS. 2 to 4. 8 is a cross-sectional view of a frenulum obtained by the method of the present invention, and FIG. 9 is a diagram showing a second embodiment of the apparatus of the present invention; FIG. 10 is a front view showing the third embodiment of the device of the present invention, FIG. 11 is a front view seen from the same direction as FIG. 4, FIG.
Fig. 12 is an explanatory diagram of a conventional roller-type slitter, and Fig. 13 is a cross-section of a small strip obtained by a conventional roller-type slitter. It is a diagram. 1..., frame 206. Upper roller 3... Lower roller 4-7... Cutting blade 5... Lifting screw 6
..., operation handle 8, ... strip material 9.9A0
．．・Strip-shaped body 10... Paris 11... Sagging 12... Covering layer 13... Back metal layer 14...
Peeling 16. ,．． 7 frames 17..., first roller pair 18... second roller pair ic+,,,g three roller pairs 20.21. ,,Bearing box 22.23. ,, Lifting screw 24.25・0. Operation handles 26-28. ,, Upper roller 29-31・8. Lower rollers 26a to 31a, - annular blade 32.38. ,,first roller pair 33.39. ,,@lower roller pair

Claims (1)

[Scope of Claims] 1. After cutting grooves having a substantially V-shaped cross section parallel to the longitudinal direction of the strip material at opposing positions on both sides of the strip material, the bottom of the grooves is cut from one side of the strip material. A method for cutting a strip material, the method comprising dividing the strip material into at least one or more small strips each having an inclined side edge having a wedge-shaped or V-shaped cross section by cutting a thin portion of the material. 2. While moving the strip material in its longitudinal direction, a rotary tool having a wedge-shaped or V-shaped cross-sectional cutting edge on the outer periphery is used to cut the strip material at opposing positions on both sides of the strip material in the longitudinal direction. After carving a groove with an approximately V-shaped cross section parallel to the
By cutting the thin walled part at the bottom of the groove from one side of the strip material with another rotary tool having a longer cutting edge than the rotary tool, the inclined side edge with a wedge-shaped or V-shaped cross-section is formed. 1. A method for cutting a strip material, the method comprising dividing the strip material into at least one or more small strips each having a section. 3 A roller pair is formed by two rollers arranged close to each other and parallel to each other, and the roller pairs are arranged in tandem in at least two stages, and the gap between the rollers of each roller pair is formed into a longitudinal direction running path of the strip material. A wedge-shaped or V-shaped cutting device for carving grooves having a substantially V-shaped cross section extending in the longitudinal direction of the strip at opposing positions on both sides of the strip. An annular or disk-shaped blade with a cross-sectional cutting edge on the outer periphery is provided at the same position on each roller, and the length of the cutting edge of each blade of the first stage roller pair, into which the strip material first enters, is the same as that of the second stage roller pair. The cutting edge length of the first roller belonging to the final stage roller pair is designed to have a length that can break through the thin walled part of the groove bottom of the groove formed in the strip material in the front stage roller pair. On the other hand, the length of the cutting edge of the second roller of the final stage roller pair is designed to be such that it does not touch the cutting edge of the first roller. 4 A roller pair is formed by two rollers arranged close to each other and parallel to each other, and the roller pairs are arranged in tandem in at least two stages, and the gap between the rollers of each roller pair is formed into a longitudinal direction running path of the strip material. It is a roller-type cutting device in which each pair of rollers includes a bladed roller having an annular or disc-shaped blade with a V-shaped or wedge-shaped cross-sectional cutting edge on the outer periphery, and a bladed roller with a smooth outer peripheral surface. and a smooth roller formed on the belt-shaped material, and the roller arrangement in each stage of roller attachment is different so that the smooth roller and the bladed roller are in alternate contact with one surface of the strip material at every other stage, In addition, the length of the cutting edge of the bladed roller of the first stage roller pair is designed to be shorter than that of the second stage roller pair, and furthermore, the blade of the bladed roller of the last stage roller pair is the thin part of the groove bottom of the groove formed in the strip material at the previous stage. A belt-shaped material cutting device characterized by having a blade edge length capable of cutting through.