JPS60249566A - Grinding of stripe material - Google Patents

Abstract

PURPOSE:To improve the grinding efficiency in the method for grinding same face of stripe material several times by making a grinding unit rotatable around an axis parallel with normal line at the grinding portion of stripe material. CONSTITUTION:Stripe material 20 to be grinded is pulled from a coil set in a winding machine and passed between upper drum 11 and lower guides 2a, 2b in the arrow direction 20' to be set in the left winding machine. Upon rotation of motor, an endless grinding belt 17 will rotate in the arrow direction 17' to gring the upper face of the stripe material 20 held between said belt 17 and guides 2a, 2b with predetermined pressure. With correspondence to periodic rotation of head pulley 15 around the shaft 15', the endless grinding belt 17 will move axially with same period on the outercircumferential face of a contact wheel 13 thereby almost all width of belt will perform grinding. Here, the grinding stripes of the grinding units 12, 13 will cross with the angle of approximately 60 deg..

Description

[Detailed description of the invention] The present invention relates to a method and apparatus for grinding a strip material.

Grinding equipment for strip material generally sets the strip material in an unwinding machine and a winding engine, and continuously passes the strip material in the length direction.
One or more grinding units equipped with grinding means that move in a circumferential direction, such as a grinding toilet, buff, brush, endless grinding belt, etc., installed between the unwinding machine and the winding machine grind one or both sides of the unwinding machine. . Then, the strip material to be ground is ground on the same surface a plurality of times in the same pass as necessary, or by making additional passes.

In the conventional grinding Nu device, the direction of movement of the grinding means at the contact portion with the strip material is made to coincide with the longitudinal direction of the strip material. Therefore, the direction of the grinding marks (grinding marks) also becomes this length direction. In this conventional grinding method, when the grinding pressure is increased in order to increase the grinding efficiency, the thin strip material is deformed due to thermal expansion etc., resulting in uneven grinding or scratches.

The present invention particularly aims at improving the grinding efficiency in the grinding of strip materials.

The present invention is a method of grinding the same surface in the thickness direction of a strip material multiple times, characterized in that the second and subsequent grinding steps are performed in a substantially different direction from the grinding immediately before the grinding. A method for grinding a strip-shaped material, and a plurality of grinding units that grind the same surface of the strip-shaped material are arranged so that the strip-shaped material passes in series, and the grinding direction of the second and subsequent grinding units from the passing direction of the strip-shaped material. In the case where there is a single grinding device or grinding unit in which the grinding direction is different from the immediately preceding grinding direction, the grinding unit is characterized in that the grinding unit is rotatable around an axis parallel to the normal line of the grinding part of the strip material. This is a grinding device for strip material.

In the present invention, grinding refers to a process in which the tip of a grain or the like approaches and contacts the workpiece surface with its normal component when it is a unit cutting edge,
This is a processing method in which the surface is scraped away due to the relative speed difference during contact, producing chips, which are then separated from the surface with their propensity to form, and the chips are discharged through the resulting space. This grinding process allows for smooth removal of shavings, and is a highly efficient processing method compared to processing methods such as honing or lapping.

The inventors of the present application have tested various methods for improving the quality of the ground surface of conventional strip grinding. As a result, it was confirmed that when re-grinding a previously ground surface, grinding efficiency can be improved by changing the direction of grinding, and grinding quality such as reduced scratches can be improved. This is probably due to the following reasons.

As is well known, grinding involves scraping the surface of the material to be ground with the tips of sharp grains to produce chips, and it is desirable to discharge these grinding chips without coming into contact with the surface to be ground as much as possible. However, when the same grain comes into contact with the workpiece over a long distance, the grinding debris becomes long and hairy, and when it cannot be accommodated in the four parts between the grains, the grinding debris rubs against the workpiece and generates heat. This may cause burn-in, scratches, etc. However, in the case of grinding once and then grinding again as in the present invention, if the previous grinding direction grinds the perpendicular grinding streaks to form an angle, the grinding may be continuous or the cross-sectional area of the grinding chips may change. It is thought that this is because the particles are shredded into powder, which does not move and can penetrate into the minute recesses between particles, thereby reducing friction with the material to be ground.

For example, when polishing a test piece, the present invention is a polishing method in which the grain size of the polishing cloth is changed from coarse to fine, and the polishing direction is changed each time the cloth is changed to gradually reduce the surface roughness. It's similar to

However, the polishing method used for this sample, etc., was used to reliably remove deep polishing marks, to visually identify the polishing marks with a coarse abrasive cloth, and to directly improve grinding or polishing efficiency. It doesn't belong to. Further, the present invention is different from honing, in which the same surface of the grinder is pressed against the outer or inner peripheral surface of a rotatably moving material to be polished with a low constant pressure, and the wheel is vibrated or reciprocated in the axial direction of the material to be polished. That is, when honing is involved in machining, the grains separate from the surface to be machined and chips are not actively removed, resulting in low machining efficiency. Furthermore, surface grinding may be performed using a bowl-shaped grinding wheel to intersect the grinding marks. However, when the grinding area is large, as mentioned above, removal of grinding debris is insufficient and a large amount of heat is generated. For this reason, it cannot be applied to thin articles such as band-shaped materials because it results in uneven grinding.

Next, the present invention will be explained based on drawings of embodiments.

The figure is a front view of a device in which the present invention is applied to a wet endless grinding belt. Support stands 1a and lb are provided in a watertight boat-shaped frame 1, and on this support stand 1a11), a strip material guide device 12aS2b can be rotated by a small angle around a vertical axis by an actuator (not shown), and the whole can be moved up and down. attached so that it can move. This strip material guiding device 21L%
Reference numeral 2b denotes a frame 3, and a boot I mounted on the front and rear of the frame 3, one of which is fixed in position and the other of which is movable in the front and back directions by a take-up device.
J-4, 5, a grinding belt stretched over this pulley 4.5, an endless belt 6 having grains on the outer periphery, and an upwardly extending belt provided below the upper straight part of this endless belt 6 through the frame 3. It consists of a 2-in-7 with adjustable biasing force.

Drums 8 and 9 are freely rotatably provided at the front and rear of the frame 1, respectively. Further, in the frame 1, cylinders lO are guided by brackets extending from the frame l, respectively, between the drum 8 and the strip material guide device 2a, between the strip material guide devices 2a and 2b, and between the strip material guide device 2b and the drum 9.
A drum 11 is mounted so as to be movable in the vertical direction and to allow different heights on the left and right sides (perpendicular to the plane of the paper).

Almost similar grinding units 12, 13 are provided directly above the strip guiding devices 2a, 2b. A contact wheel 13 that is rotatably driven in the direction of the arrow 1 by a transmission system including these supports, a head pulley 15, a splash guard 16, and a mount wheel 13 that are rotatably supported directly above the contact wheel 13 via a support device 14 bracket. Endless grinding belt 17 stretched between Toherado pulleys 15
Consisting of The support device 14 applies a constant tension to the endless grinding heald 17 via a helad pulley, and also includes a biasing force applying device that releases this tension with a lever (not shown) and a head pulley circumference 15 that rotates at regular intervals between 15'. Grinding units 12 and 13 have a built-in belt shaft device for moving the grinding units 12 and 13.
The axes of the contact wheels 13 are fixed at fixed angles in opposite directions relative to the length direction of the frame 1.

The tip of the strip material 20 to be ground is pulled out from a coil set in an unwinding machine (not shown) on the right side of the figure, and the tip is pulled out as shown by the arrow 20 with the drum 11 upward and the strip guide devices 2a and 2b downward.
The sheet is threaded in the direction shown in FIG. The unwinding machine has a built-in braking device that applies a constant tension to the strip material. The strip material 20 to be ground is continuously passed in the direction of the arrow 20 by the winding machine, and the position of one edge thereof is detected by a detector using an air jet (not shown) provided in front of each grinding unit 12, 13. is detected, and based on this output, the strip material guiding device 2a
N2b is rotated by a small angle around the vertical axis, and the belt-shaped material 20 to be ground is rotated by a belt-shaped forestry interior fl on its back side.
Since it is guided by the rolling blade of the drum 11 under tension with an endless belt having grains on the outer periphery of the drum 11, it is always maintained within a constant path line.

For this reason, the left and right sides of the drum 11 are allowed to have different heights.

When the motor (not shown) is operated in this state, the endless grinding belt 17 rotates in the direction of the arrow 17', and the strip material 20, which is held between the belt 17 and the strip material guide devices 112a and 2b at a predetermined pressure, rotates on its upper surface. Grinded. As described above, the width direction component of the grinding reaction force is safely transmitted to the endless belt 6, and there is almost no deviation in the width direction of the strip material 20, and even if deviation occurs, it is corrected as described above. The endless grinding belt 17 moves in the axial direction on the outer circumferential surface of the contact wheel 13 at this period when the head pulley 15 rotates periodically around the shaft 15', so that almost the entire width of the belt is Performs a grinding action. In this embodiment, the grinding wheels 13 are oriented in a direction of 3CP perpendicular to the pass line, so the grinding marks made by the grinding units 12 and 13 are approximately 6CPO intersecting.

In this embodiment, an endless belt with grains is used in the belt material guide device to increase the coefficient of friction with the belt material to be ground.
In addition, the belt material is wound around the front and back of the grinding part with tension so that the width direction component of the grinding reaction force is safely transmitted to the belt material guide device, and an automatic pass line correction system is installed. It has the feature that even thin strip materials can be reliably ground uniformly across the entire width direction. In this embodiment, when the strip material to be ground is relatively thick, the drum 11 is pulled up and ground. Further, the liner 7 may be shaped like a mountain having a top portion directly below the contact wheel 13 in the same direction as this wheel. Note that the guide device used in the present invention is not limited to the above embodiments, and in the case of a thick strip material, the edge surface is
The belt shift device described above is well known, and strictly speaking, the grinding streaks should have intersected in the conventional device. This intersection angle is very small and does not substantially improve grinding efficiency.

Next, although illustration is omitted, the present invention can be practiced even when there is only one grinding unit. In this case, the grinding unit is made rotatable around an axis parallel to the normal line of the grinding part of the strip material,
It is possible to pass the strip material to be ground through the apparatus in two or more passes, and change the angle of the grinding unit each time the machine passes.

As described above, according to the present invention, even if the grinding pressure is increased in order to increase the grinding efficiency, the grinding efficiency does not improve to a certain extent.On the other hand, the grinding material such as the grinding belt and the power consumption increase Grinding quality had deteriorated due to the occurrence of scratches and distortion due to heat generation, but these issues were resolved and the grinding performance was improved.
It can be easily improved to about 0%.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the apparatus of the present invention. Ol: frame, 2a, 2b: strip guide device, 12.13: grinding unit, 11: drum. Figure 1 6] '11 Ill (71) Name 4jf = Name of the person responsible for the grinding method and device correction for the strip material Chair (sos+ D Ritsumeikan Co., Ltd. Assigned to Norio Furukawa - Residence Chiyo, Tokyo [ Section 14, Section 90, Inner Bottom, No. 1, No. 2, and Drawing Amendment Details 16 The detailed description of the invention column in the specification is amended as follows: (1) Page 2 of the specification, line 18, “Scratch The following should be corrected as follows: ``Scrats occur.The cracks generated on the surface of the material to be ground by the abrasive grains become larger, and these cracks are pressed by the guide sole etc. in the grinding device, resulting in capri etc. ``There were problems such as causing new defects.'' (2) ``Comparison'' is added after ``compared to processing method'' in the first line of page 4 of the specification. (3) ``Comparison'' is added in line 1 of page 4 of the specification. After line 7 “Scratch”, add “Kumomi Capri”. (4) “12.13” on page 7, line 9 and line 10 of the specification
Corrected to "according to". (6) Page 8, line 1 of the specification, correct “kuto”, line 1 “futo” (6) Page 2, line 18 of the specification, “heshi” Z “nishi”
Correct. (7) Page 11, line 6 of the specification, “Occurrence of Scratch Book” t
Correct to "Occurrence of scratches and fog." 0 2 Drawings Correct as follows. Figure 1 of the drawings is replaced with the attached Figure 1. Figure l

Claims (1)

[Claims] 1. In a method of continuously passing a strip material in its length direction and grinding the same surface in its thickness direction multiple times under a grinding means such as a grinding wheel, the second and subsequent grinding A method for grinding a strip material, characterized in that the direction of the grinding marks is substantially different from that of the grinding immediately before the grinding. a. In an apparatus that continuously passes a strip material in its length direction and grinds the surface in the thickness direction with a grinding means such as a grinder, the strip material passes through a plurality of grinding units that grind the same surface of the strip material. The grinding unit is arranged so as to pass in series, and the grinding direction of the second and subsequent grinding units from the passing direction of the strip material is substantially different from the grinding direction of the immediately preceding grinding unit, or a single grinding unit. A belt-shaped material grinding device, characterized in that the grinding unit is rotatable around an axis parallel to the normal line of the grinding portion of the belt-shaped material.