JPH0741528B2 - Tool polishing method and device - Google Patents

Abstract

0 A method and apparatus for sharpening knives, blades, and the like utilizing a rotating displaceable abrasive disk where the abrading force on the knife cutting edge facet in parallel contact with the surface of the disk perpendicular to its axis of rotation is controlled by a biasing means such as a spring or equivalent, the position of the cutting edge facet on the disk is established by two appropriate stops contiguous to the disk and the angle between the principal plane of the disk and the face of the knife is controlled precisely so as to accommodate knives of different thickness and shape. Magnetic means to control the angle are claimed. Methods and apparatus include sequential steps that utilize one or more orbiting abrasive surfaces together with an abrasive disk sharpener where in each step there is a guide, preferably magnetic, to control the sharpening angle and where the angle is progressively greater in those sharpening steps where the orbiting abrasive elements are employed. Also claimed are means in a disk sharpener to prevent accidental contact of the face of the blade with the moving abrasive surface.

Description

Description: FIELD OF THE INVENTION The present invention relates to improvements in methods and apparatus for rapidly abrading blades of knives and other knives for cutting into excellent blades. Here, the term “cutting tool” refers to a blade such as a chisel, scissors, or a razor, and a similar cutting blade or cutting tool similar to this.

[Prior art and problems]

There are a great variety of known polishing devices, most of which are complicated in structure and cannot sharpen a blade quickly, easily and sharply. To date, no polishing device has been disclosed that allows an unskilled person to sharpen a blade quickly as sharply as a razor blade.

For rapid polishing, a device capable of rapidly polishing a blade, for example a blade made of high carbon steel or stainless steel, is required. The polishing speed depends on the inherent height of the abrasive used for polishing, the grain size, the magnitude of the force pressing the blade of the blade, and the moving speed of the abrasive grains in the direction traversing the blade. Among the commonly used abrasives, diamond has the highest hardness, and its hardness is 10 on the Moh scale. On the other hand, the hardness of a blade made of ordinary steel alloy is about 5.5. Abrasives other than diamond, such as alumina, high density alpha alumina, carborundum, and certain natural stones, have a greater hardness than most steel blades and can be used to polish blades.

Using an abrasive made of these materials, cut the blade to a thickness of 0.00
Can be ground extremely sharply up to about 254 mm (about 1 / 10,000 inch). For that purpose, it is necessary to make the abrasive material fine and to keep the polishing rate below a limit value, that is, to prevent a thin and sharp blade from being overheated during polishing. The polishing rate of a polishing apparatus capable of such polishing is slower than that of a polishing apparatus having a large abrasive grain size and a high polishing rate.

It is destined that the polishing speed must be slowed in order to sharpen the blade of the blade, and any polishing apparatus designed to perform such polishing either polishes the blade during manufacturing or is extremely dull. Not suitable for polishing a worn blade. Therefore, in order to shorten the time required to sharpen a very dull blade as thin as the material composition and crystal structure allow, and to sharpen the blade, the time-consuming grinding operation is usually separated from the finish grinding operation. All of the existing polishing equipment that can perform this grinding and finish grinding by one machine are sharp and swift enough to satisfy a blade up to about 0.00254 mm (1 / 10,000 inch) unless sharpness is not strictly required. I can't sharpen.

Most of the prior art relates to disk-type rapid polishing equipment as described in US Pat. No. 3,680,264.
Satisfactory polishing is not possible with such devices. The reason is that the disc is extremely difficult to control originally, and obviously difficult to control is accurate positioning of the blade,
The angle between the blade and the disk surface, and the overheating of the blade during polishing. The biggest drawback is that the disc "grabs" the blade, which phenomenon occurs when the blade of the blade lies on a flat surface of the disc. Also, the other major drawback is the undesired serrations or grooves along the blade due to intuition. The "grabbing" phenomenon occurs when the control of the angle formed by the surface of the blade with respect to the surface of the disk is unstable, or when the device for holding the blade of the blade parallel to the flat surface of the disk is unsuitable. , Or when the force applied by the disc or the operator to the blade of the blade is not kept constant during polishing.

The main cause of poor sharpening by the disc type polishing device is that the angle of the blade of the blade with respect to the rotating disc is hardly controlled. An example of this is U.S. Pat.
No. 6,139, it is practiced to wobble the guide device of the cutting tool, to rely on the arm of the sharpener or to determine the polishing speed according to the width or thickness of the blade. Unless the blades are held parallel to the surface of the disc, or the blades are not sufficiently controlled to maintain a constant angle with respect to the main surface of the disc type polishing machine, the blade of the blade is sharpened optimally It is impossible to want to get rid of the shape.

In order to minimize the groove marks on the blade surface and the catching on the grindstone surface due to the above-mentioned poor control when sharpening the blade with a disc,
It has been widely used in the past that the blade of a knife was
As described in No. 3,334,446, it was a method in which it was applied only to the corner edge of the disk and the surface of the blade of the blade and the surface perpendicular to the rotation axis of the disk were made conscious and avoided. In the present invention, a spring is applied to the disk to reduce scratches at the time of polishing, and the blade is pressed and held by a plate spring on a strong holder. The guide device of the blade polishing device according to the invention is on one side of the disc and limits the movement of the blade towards the disc. Even if such measures are taken, if the blade is not brought into surface contact with the surface perpendicular to the rotation axis of the disk, the blade will make point contact or limited line contact with the grinding surface of the grindstone during polishing. Therefore, the blade is extremely easily scratched. If the grindstone passes in one direction over the blade of the tool, the blade will burl, which will cause the blade to have large serrations that are unacceptable, i.e., portions resembling large tooth spills.

An improvement having such a problem-solving direction in common is described in US Pat. No. 2,775,075. The content is that the edge of the grindstone is inclined, and the blade surface of the blade is brought into contact with this inclined surface to extend the contact line between the two. It is well known that such a blade polishing apparatus can only produce a blade with a lot of scratches, and when it is well made, it has poor sharpness and has many tooth dents. All such blade polishing equipment,
The grindstone is passed in almost one direction with respect to the blade, which causes tooth dents and large blisters on the blade.

Further, a composite type polishing apparatus is described in U.S. Pat. No. 2,519,351, one of which uses four pairs of grindstones, two pairs of which one pair of grindstones is energized and the other pair of grindstones is energized. It moves to one side, and the linear reciprocating motion simultaneously sharpens the blade surfaces on both sides of the blade. The blade is held by three jaws of a positioner which laterally floats between the pair of whetstones, allowing the blade to be slowly inserted into the positioner. This insertion is done by engaging the sides of the blade with one or more than three sets of grooved blocks. This polishing machine has a fatal drawback due to its complicated and linear movement. The disadvantage is that the blade has a saw-toothed defect, and when an object is cut with this blade, the object is torn, and the blade itself has poor wear resistance. Due to the fatal drawback that the positioning device floats and the two blade surfaces stick in the grooved block, this structure cannot be applied to any polishing device in the city.
The positioning device according to this prior art uses a positioning device based on this prior art for two reasons: the fact that both sides of the blade or the blade surfaces on both sides are used to slowly insert the blade into the sanding device, and said traverse floating. It cannot be applied to places where high-precision positioning is required. The degree of insertion of the blade, and thus its position, depends on the width of the blade, the width and angle of the blade surface, the degree of manual pressing applied during polishing, and the degree of movement of the objective.

Further, US Pat. No. 2,751,721 describes a polishing apparatus using a drum type grindstone. In this blade polishing apparatus, the blade surface is sharpened by a round portion of the drum surface, and the drum surface rotates in a plane perpendicular to the rotation axis of the drum.
The polishing force applied to the blade surface is determined only by the force manually applied to the blade, which causes the polishing speed to constantly fluctuate, the blade formation to be poor, and the blade to have serrated defects. These problems are common to many prior art techniques. The reason for the poor position and stability of the blade in the holding device and the controllability of the angle of the blade surface with respect to the grindstone surface is that these characteristics are governed by the pressing force applied by the sharpened object, and This is because, despite the wide variety of blades used in society, the blades have a common blade surface shape.

U.S. Pat. No. 2,645,063 describes a blade polishing device having a drum surface and a guide mechanism. This guide mechanism has a stop device, which is used for positioning the blade,
This is done by using the bearing and the blade itself. However, such a stop device is not practical. The reason is that the blade is blunted because it crosses one face of the guiding device at a right angle by rubbing it directly. This U.S. patent and U.S. Pat. No. 2,751,721 describe a tool sharpening device using a magnet, but the magnetic field of the magnet does not support or guide the tool.

[Object of the Invention]

It is an object of the present invention to provide a method and apparatus for eliminating the above-mentioned drawbacks and quickly making a sharp blade into a thin and sharp blade.

[Outline and effect of invention]

The above objective is accomplished by a method and apparatus for polishing a blade that uses an improved disk-type blade polishing apparatus and precisely controls each stage of polishing. Further, the disk type blade polishing apparatus can be combined with an orbit type blade polishing apparatus to make a new blade polishing apparatus. By using the disc type blade polishing device, an unskilled person can make a blade into a shapely and reasonably sharp blade, and the blade can be sharpened without causing saw-tooth defects, overheating, or damage over the entire blade. Can be sharpened to the blade. In addition to using a disc type blade polishing device, by using a new orbit type blade polishing device, it is extremely thin or thin, and
A sharper blade can be produced quickly. A crucial point in the most effective use of this method and apparatus is to control the polishing angle at each polishing step.

The disc type blade polishing device described here is provided with a highly accurate blade guide device and a highly accurate stop mechanism that does not damage the blade, and this stop mechanism is one of the blades of the blade tool as a part of the blade control device. Acting only on the surface, the blade control device brings one blade surface into contact with and positions parallel to the grinding surface of the disc-shaped grinding wheel, the grinding surface being perpendicular to its axis of rotation. Eggplant The guide device is preferably of a magnetic field type, and precisely controls the angle of the surface of the blade adjacent to the polishing surface of the disk type grindstone with respect to the polishing surface at the same time, and controls the blade surface in cooperation with the urging device. Further, the force exerted on the blade surface of the disk-shaped grindstone polishing surface is controlled to be constant to solve the difficult problem of scratches on the blade surface common to conventional disk-type blade polishing devices. The disc and the guiding device are positioned with high precision with the blade and are abutted if the blade is removed and directly adjacent but restrained without contact. The distance between the disc surface and the guide device is extremely small, usually 1,588 mm (1/16
Less than an inch). The guide and stop align so that the longitudinal direction of the blade surface is parallel to the plane of the disc, but either the disc or the guide can be moved towards the other by the biasing device. Such a biasing device is here
Includes springs, solenoid valves, motor armature magnetic action, and other driving force devices that push the discs to guide them to close the gap with the guides, but the discs are not in opposition to the biasing device. Movement within a limited range, thereby ensuring that the biasing force is applied during polishing. This kind of urging action is generated by a spring or other device having a driving force in cooperation with a highly accurate stopping device, and this urging action causes the rotating disc to have a predetermined force during polishing by a predetermined force. It allows it to rotate with respect to the surface, thereby precisely controlling the level of polishing force applied. This new disk-type polisher quickly cuts blades to the order of 0.025 mm (1/1000 inch) or less. Actual blade thinness is highly dependent on blade material, abrasive grain size, and other factors.

As one form of the disc, a hub is provided in the center, and the hub protrudes sufficiently beyond the surface of the disc to prevent the blade from coming into contact with the grindstone due to mishandling during use of the disc-type blade polishing device. As another form of the disc, the same function can be achieved by extending the housing surrounding the disc.

The blade is greatly polished using a disc type blade polishing device, and further polished using an orbital type polishing device. This orbital polishing machine is equipped with a highly accurate blade guide or holding device to quickly reduce the blade thickness to 0.00254 mm (1 / 10,000 inch) or less. The maximum width of the blade is mainly determined by the properties and quality of the steel and other materials used in the blade. The guide device used for positioning the tool at the stage of this track-type tool polishing device preferably has magnetism, and normally positions the surface of the tool so as to maintain an angle with the track surface of the grindstone. . This certain angle is hereinafter referred to as 2 polishing angle,
This second polishing angle is preferably larger than the first polishing angle. This first polishing angle is an angle formed by the surface of the cutting tool and the polishing surface of the disk-shaped grindstone at the stage of polishing by the disk-type polishing apparatus preceding this polishing, and this is hereinafter referred to as the first polishing angle. In this way, the blade surface of the blade can be sharpened at an angle slightly larger than the total blade surface angle of the blade polished by the disk-type blade polishing apparatus.

Further, the combination of the disc type blade polishing and the orbit type blade polishing is novel. The reason is that the polishing speed as a whole is high and a blade with extremely good sharpness is obtained. The disk-type polisher disclosed herein rapidly polishes the blade of a knife, and the orbital polisher used next rapidly sharpens the blade like a razor blade.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, the general concept of the method for sharpening a blade according to the invention and the device for carrying out this method will be explained in detail.

The present invention is based on the premise that a disc-shaped grindstone is used and the blade, that is, the grinding surface of the blade is held parallel to the side surface of the grinding wheel, that is, the plane perpendicular to the rotation axis of the grinding stone. The side surface of this grindstone is perpendicular to the axis of rotation and contains innumerable surface abrasives. Hereinafter, this surface is referred to as the main surface of the grindstone. Such a disc-shaped grindstone has extremely excellent characteristics as compared with a grinding wheel, an umbrella-shaped grindstone, and a grindstone that moves in a straight line, and as described below, the abrasive material of the grindstone is a multidirectional directional blade. Simultaneously traverse, i.e., the cutting direction to the blade, the direction to and from the blade, and one direction parallel to the blade. The advantage of this whetstone is that it minimizes the burr of the blade and almost completely removes the burr of the same degree as in the case of sharpening only in the straight direction. However, strictly speaking, the rotation path of the cutting edge of this grindstone is not a perfect circle, and the polishing action is not uniform in multiple directions. Therefore, the disk-shaped grindstone is provided with a tool positioning device, and the positioning device is provided with a guide device for guiding the blade surface of the tool and two stop devices for stopping the blade surface, whereby the flatness of the main surface of the grinding wheel is improved. To increase the contact area with the blade, thereby facilitating the holding of the straight portion of the blade and preventing "grabbing" on the grindstone that causes scooping and jaggedness of the blade.

The disc type blade polishing apparatus according to the present invention eliminates the drawbacks of the conventional disc type blade polishing apparatuses due to its novel shape. Polishing is performed on the main surface of the grinding surface that is perpendicular to the axis of rotation of the grindstone. This has the advantage that, compared to the case where the beveled edge of the umbrella-shaped grindstone is used for polishing, the polishing direction changes and the grindstone is flat, so that the blade formed is less curled. This polishing method uses a disc-shaped grindstone and a highly accurate blade guide device adjacent to it, and the gap between the disc-shaped grindstone and the blade guide device is narrowed, that is, usually 1.5875 mm with the blade removed.
It can be realized by making it less than (1/16 inch). This properly designed guiding device moves the blade into its thickness, shape,
Regardless of the contour, it is possible to control with good re-limitation so that the main surface of the grindstone is at a predetermined position and at a constant angle. The guide device is adjacent to the grindstone, and its guide surface extends from end to end of the main surface of the grindstone and extends in the vicinity of the grinding line along the grinding line and across the grinding line. Therefore, normally, the blade cannot be well supported, and even if the blade is short, the entire blade cannot be sharpened accurately. The blade must be held by the guide device so that the polishing angle, that is, the angle between the blade and the grindstone does not change over the entire length of the blade surface to be polished. The guide device is preferably a magnetic guide device, but can be any other type of guide device. If the guide device is improved as described below, the drawback of the conventional disc type grindstone, that is, when the blade is set parallel to the surface of the grindstone, the grindstone bites into the blade and cannot hold the blade correctly, and the polishing angle is It is easy to remove the defect that the blade has a spot, a serrated portion or the like.

It is when the size of the force exerted on the blade and the rotating grindstone is uncontrollable that the disk polisher scoops or saws the blade. In the conventional polishing apparatus, the force applied to the blade and the grindstone is strongly influenced by the sharpening method and skill of the sharpener, the thickness and shape of the blade, and other design factors. In order to eliminate such drawbacks, the present invention positions the handle of the blade so that the surface of the blade is on the guide surface of the guide device. This attachment is done manually. This attachment is preferably carried out using a magnet, in which case the surface of the blade is lowered toward the disc-shaped grindstone until the magnet contacts the first sharpening portion of the blade of the blade, and the disc is placed appropriately. It is moved a certain distance by the selected biasing force and then firmly fixed to the two stops. The stop is precisely positioned on the periphery of the disc, immediately adjacent but not in contact with the disc as described above, in a properly contiguous position to limit the further movement of the blade towards the disc. Force the blade to align with the major surface of the spinning disc. The main surface of the disk remains parallel to the surface in the rest position during movement. The range of movement of the disc is determined by the position of the face of the disc in the rest position and the position of the stop device acting only on the first blade face, which also makes contact with the face of the disc. By using such a stop device across the blade surface of the blade to be moved so that the position of this blade surface is held accurately during polishing so that the blade itself is not damaged at all. You can By using a guide device adjacent to the surface of the disk and a stop device that acts only on one blade surface, the polishing angle is maintained with high accuracy without being affected by the errors in the blade thickness and the inclined surface ratio. be able to.

A rotating disc mounted on the armature shaft of a suitable motor is biased, for example by a spring or by an armature, towards the guide device, since these devices limit the movement of the disc. When the blade is removed, the disk surface directly abuts the blade guide without contact. A spring or other biasing device exerts a constant force directly or indirectly on the disc, causing the blade to move the disc laterally and the disc surface to apply to the blade surface when the blade of the blade rests on the stop. Determine your strength. By this method the disc is always "spring-loaded" on the blade surface during polishing. When the disc is firmly attached to the armature shaft of the motor, the motor has a structure (axial gap) that does not hinder the traverse movement of the armature and its shaft, and this structure allows the disc to move to its rest position and the blade surface. Traversing between a stop position and a movement position determined by the position when facing is possible. Install a leaf spring at the end of the armature shaft opposite the disc,
It is convenient to apply the required biasing force to the disc. The leaf springs can, of course, be repositioned to push directly against the back of the disc, or any other point along the shaft supporting the disc. The force of the spring is basically uniform depending on the movement of the spring, but can be non-uniform.

Many devices have different structures but the same biasing action. For example,
There is a structure in which the motor is supported by a biasing spring so that the motor can move toward the disk. Similarly, the disc may be mounted on a separate shaft and driven by a motor shaft using gears, belts or other devices so that the spring acts directly on the back of the disc or directly on the separate shaft. There is also a structure. The stop device disclosed herein acts on the blade surface to minimize the free range of movement of the disc. The limit is such that it can accept blades of various sizes and shapes for household use.

Equivalent control of the blade surface during polishing is achieved by allowing the blade holder to move exactly away from the fixed disc to accept blades of different thickness. it can. In the latter case, the disc is fixed so that it cannot freely traverse along the axis of rotation of the disc. In this case, a spring or other biasing device acts on the holding device to push it towards the fixed disk. However, once the blade is removed, the retainer is adjacent to the disc in the rest position but does not make contact.

The use of a device for controlling the polishing force during polishing does not change the importance of moving the disk or holding device without changing the polishing angle. Here, the polishing angle is the angle of the guiding device, and at this polishing angle, the surface of the blade rides on the main surface of the polishing disk. This polishing angle is independent of the blade thickness, width or length. Neither the surface of the tool nor the holding device should be tilted when their relative separation changes. For example, when the disc moves, the main surface of the disc-shaped grindstone is
During the traverse of the disc, it must remain parallel to the major surface of the disc in the rest position.

When using certain types of edge sharpeners, in order to avoid accidentally damaging the sides of the edge, for example inadvertently during use of the edge sharpener,
This is a part of the invention. A central hub, usually made of plastic material, on the disc is made to project far enough from the seed face of the disc to stop the face of the blade. This protruding position is above the blade surface, and the blade is stopped by the protruding hub before it accidentally contacts the grindstone on the disk. The hub must be shaped so that it can project without significantly impeding the attachment and retention of the blade on the annulus of the disc. Hubs can be used in disc-type blade sharpeners and are used when the blade of the blade contacts the disc well below the center of the disc, and when the surface of the blade is at the axis of rotation of the disc during polishing. When crossing in front of. Another protective device that can be used on the disc regardless of the position of the blade will be described.

Damage to the blade of the blade is also caused by overheating of the blade during polishing. As a protective measure against this, it is preferable to make the output of the motor large enough for polishing, and it is inappropriate to make this output excessive. The reason is that if the blade accidentally bites into the disc or stops the disc, it will cause significant damage to the blade. The force that a disc exerts on a blade is determined to some extent by the diameter of the disc,
The speed and volume of the disk's rotating device also affects, and the energy of the disk's kinematics when the blade stops the disk. The diameter of the disk is 25.4 to 76.2m (1 to 3
Inch) and the rotation torque of the motor is 10.3692 kg-cm
If it is about (9 inches-pound), the polishing work can be performed smoothly and the damage to the blade can be minimized. If the diameter of the disk is about this, the energy of the polishing force can be made sufficiently appropriate in the lengthwise direction of the blade, and polishing can be performed uniformly along the blade surface. It is also possible to set the diameter of the disk to a value other than the above value by appropriately selecting the motor. If a friction clutch is used as another device, it is possible to control force, torque, and energy transferred to the disk.

1 to 3 exemplify a preferred embodiment of a disk-type polishing apparatus 20 for carrying out the above-described improvements.
A motor 24 is attached to the bottom plate 22, and the motor 24
The left shaft 26 drives a grindstone holding device 28, and a disc-shaped grindstone 30 is mounted on the surface of the grindstone holding device 28, and the grindstone 30 is evaluated as a polishing surface. The grindstone holding device 28 and the grindstone are surrounded by a plastic enclosure member (housing) 60. The enclosure member 60 has an opening for allowing the grindstone to come into contact with the blade, and is fixed to the bottom plate 22 with a screw (not shown). To be done.
The bottom plate 22 is supported by rubber legs 32. The shaft 26 of the motor and the armature extension 44 on the right side of it are the bottom plate 22.
The armature extension 44 is supported by sleeve bearings 38,40 through vertical support members 34,36, which are attached to the bottom plate 22 by screws (not shown) or the like. . The biasing device 42 is composed of a leaf spring and is supported by the bottom plate 22, and the leaf spring 42 and the thrust bearing 46 allow the armature extension portion 44 to freely move in the horizontal direction by a certain distance. 2 and 3, the blade 48 is held by the blade guiding device 50, the blade surface of the blade 48 faces the surface of the grindstone 30 in parallel, and the grindstone 30 rotates at a right angle to the rotation axis of the grindstone. To do. The hub 52 projects slightly from the surface of the grindstone 30 to prevent accidental contact of the upper surface of the tool with the grinding surface of the grindstone.

The stop device 54 is integral with the vertical surface of the plastic enclosure member (housing) 60, faces the blade guide device 50, and as shown in FIGS. 1 to 3, surely grinds the blade surface of the blade. And the position of this blade surface with respect to the grindstone 30 is securely held during polishing. This stop 54 acts only on the vertical blade surface. The vertical portion of the enclosing member 60 has a blade surface that is parallel to the main surface of the grindstone when the vertical blade surface faces the enclosing member 60 at the position of the stopping device 54 so that it acts similarly to the stopping device 54. It is arranged at the position to obtain. The stopping function of the blade is the stopping device 54
Can be demonstrated independently of the using member 60 by being attached to a position adjacent to the peripheral edge of the grindstone holding device 28 but not in contact with it in any case. Enclosure member 60 for stop device 54
When made of a material irrelevant to, the stopping device 54 can be made of various materials, such as highly lubricious plastic, martensitic steel, or metallic material for rollers,
It can also be made of a material that is less abrasive, for example a material that can scrape off the blade burr of a blade or a material that lightly scrapes the blade when the blade moves on a stop device.

Plastic housing 58 is motor 24, support member
Cover 34, 36 etc. The plastic enclosure member 60 encloses most of the grindstone holder 28 and prevents the rotating grindstone 3 from harming others.

FIG. 2 shows a cross section of the blade guide device 50. The tool guide device 50 has a plastic structure 51, a hard magnet piece that attracts the tool, and a tool surface guide surface. The angle formed by the surface of the blade on the blade guide surface with respect to the surface of the magnet is
This magnet 62 is set by
It is installed at a position adjacent to 68. The cross section of this blade is shown in FIG. The guide device facing the grindstone 30 is
Adjacent to, but not actually contacting, to form a narrow gap 56 apart. The extension portion 49 forming a part of the guide device 50 is an extension portion of the blade surface guide surface whose upper surface is formed by the magnet 62, and the extension portion 50 of the guide device 50 is provided on each side of the grindstone holding device 28. It adheres to the enclosure member 60. The blade 48 shown in FIG. 4 has an upper slope 66 and a lower slope 68. The blade surface 70 of this knife is
The blade is formed by projecting as shown in FIG. When the whetstone 30 rotates, the abrasive grains on the surface of the magnet that rotates with this whetstone give a force to the blade 48 in contact with this whetstone, and this force causes the lower slope 68 of the blade 48 to rest on the hard magnet piece 62. Ride without difficulty. As can be seen from the figure, it is extremely difficult, unstable, and inaccurate to control the polishing angle by placing the upper sloped surface 66 of the blade on the grindstone surface. When the blade is, for example, a single-edged blade and has the inclined surface 66 shown in FIG. 4 and the lower inclined surface 8 is absent, this FIG. 66 extends to the blade surface 70, so that the guide device is of course stable.

As shown in FIGS. 1 to 3, the grindstone 30 rotates. The speed of rotation is preferably less than 800 feet per minute at the periphery. Otherwise, the blade will burn easily. Various rigid blade guides can be used for the disc type polishing apparatus, but in order to control the polishing angle accurately, with good reproducibility, and with high accuracy, it is preferable to use the guide apparatus improved as described above.

The hub 52 shown in FIGS. 1-3 extends a carefully selected distance t (FIG. 5) from the grindstone surface and may be mounted on the grindstone surface as shown. 30 and grindstone holder 28
It may be pressed into the hole at the center as a short rod. This hub 52 should not be too thick. The reason is to prevent the hub 52 from being caught on the surface of the guide device 50, and the blade surface 70 of the blade 48 projects toward the gap 56 for a long time.
This is to prevent contact with the surface of 30. However, as shown in FIG. 1, the thickness t of the hub 52 must be about 0.2 mm (one thousandths of an inch) or more when the diameter of the grindstone is 25.4 to 50.8 mm (1 to 2 inches). No, usually 0.
It is 254 to 0.508 mm (10/1000 to 20/1000 inches). This is to prevent the lower slope 68 of the blade from accidentally coming into contact with the surface of the grinding surface 30. The thickness of this hub is usually less than a few percent of the diameter of the grindstone.

The thickness of the hub 52 shown in FIGS. 1 to 3 is 0.254 to 0.508 mm (10/1
000 to 20/1000 inches), the blade 48 is the second
It is possible to make it difficult to enter the gap in the internal space having the clearance angle γ shown in the figure. In the case of FIG. 2, this angle γ is about 3 ° smaller than the polishing angle θ (θ is usually about 20 °). In the case of FIG. 2, the polishing angle θ is an angle formed by the blade guide surface of the blade guide device 50 and the surface of the grindstone 30. The clearance angle γ is an angle formed by the blade guide surface of the blade guide device 50 and a line extending from the blade surface to the leftmost edge of the hub 52. The wheel 30 can be of any diameter and is rotated so that its peripheral surface has a linear velocity of less than 800 feet per minute. The blade surface 70 of FIG. 4 must be brought into contact with the grindstone at a position sufficiently distant from the center of the grindstone so as not to interfere with the hub. Wheels typically have a diameter of 12.7 to 76.2 mm
(1/2 to 3 inches) and the hub has a diameter of 1.59 to 6.35 mm
(1/16 to 1/4 inch), or about 10% of the diameter of the grindstone. The hub can be made of any material, but is ideally made of plastic or a similar material. The reason is that even if the blade comes into contact during polishing, the surface of the blade will be damaged or will not be damaged.

The position where the blade of the blade 48 crosses the surface of the grindstone 30 is, as shown in FIG. 3, a line where the guide surface of the blade surface intersects with the surface that stops the vertical blade surface of the stopping device (indicated as a point in the figure). Be done)
Depends on the height of. Usually there is a blade just above this point. The abrasive grains of the grindstone 30 traverse the blade of the blade at various angles. In other words, the abrasive grains in the part with the grindstone cross the blade surface in the direction of cutting the tool (upward in FIG. 3), although the angle is different, and most of the other grits in the grindstone are the tool. Traverse the blade away from the blade after polishing (downward in Fig. 3),
The abrasive grains in the portion close to the center of the grindstone move substantially parallel to the blade while contacting the blade.Each device of the blade polishing device according to the present invention is a flat surface perpendicular to the rotation axis of the grindstone. As the blade is polished while being controlled precisely without getting caught,
It is possible to exert the advantage of polishing the blade by the various angles described above, and it is possible to minimize the curling of the blade. Therefore, this disc type polishing apparatus is suitable for performing polishing as a pre-stage of finish polishing. In the finishing sharpening stage, the blade of the blade is sharpened by the action of the abrasive grains that grind at various angles of the grindstone, on the order of 0.00254 mm (1 / 10,000 inch) in thickness.

Returning to FIGS. 1 and 2, the grindstone 30 is pushed toward the grindstone holding device by the leaf spring 42. Therefore, when the blade 48 held by the guide device 50 is pushed down along the guide surface of this guide device until the blade surface engages with the stop device 54 on the surface of the enclosing member 60, this blade surface 70 This forces the surface of the grindstone 30 laterally to the right from the rest position XX toward the biasing device. The force of the grindstone 30 pushing the blade surface 70 is a leaf spring.
Determined only by the power of 42. The free movement distance of the grindstone 30 and the leaf spring 42 must be sufficiently long. Its length is
Before the blade surface of the blade reaches the stop device 54, the grindstone 30 and the support shaft 26 are prevented from reaching their movement limits, and there is still a sufficient margin.

Very importantly, as shown in FIG. 13, the position of the blade guide device 50c can be improved so that the blade surface 70c is on the line above the center of the grindstone. In this case, the fifth
As shown, the hub 52a is not needed. The tool guide device 50c of FIG. 13 has a grindstone 62c, and this magnet 62c has a guide device 5c.
The surface of 0c is at a point above the center of the grindstone 30c, so the blade surface 70 is above the centerline of the grindstone 30. When the blade 48 moves and lowers the surface of the guide device 50c, the blade surface perpendicular to the blade 70c
Contacts the surface of the grindstone 30 on the rest surface shown in FIG. 13 and moves the grindstone to the right towards the biasing device (not shown), which causes the force of the spring or other device of the biasing device. Although it is added to the vertical blade surface to the full, it exceeds the free movement limit of the grindstone 30
It is possible to prevent the blade from being caught by the grindstone as described above without pressing the 30c and applying an excessive pressure to the blade surface. A stopping device 54c showing the vertical blade surface 70 of FIG. 13 as an integrated part of the enclosing member 60c, that is, if it is provided on one side of the grindstone, this blade surface is horizontally attached to the surface of the grindstone 30. It can be moved horizontally in parallel, and it is not necessary to bring the grindstone into contact with the blade surface at all during this horizontal movement. Enclosure member 60 in FIG. 13
The surface of the stop device 54c of c can be parallel and perpendicular to the surface of the grindstone 30c. Therefore, during polishing, it can be made parallel to the vertical blade surface, and the surface of this stop device 54c can be slightly inclined (several degrees) toward the tool guide device 50c when it is on the surface of the grindstone 30c. The vertical blade surface 70c of the blade can be brought into contact with the guide device 54 and can slide along the guide device 54c, and the surface of the guide device 54c is slightly vertical to move away from the guide device of the blade. The blade can be inclined to remove the burr of the blade more efficiently, or the blade surface, sometimes the portion adjacent to the blade, can be lightly polished. It is not necessary to provide a stop device having the same function as a part of the enclosing member 60c, but it may be attached to the bottom plate 20c in a separated structure as described here.

As shown in FIG. 13, it is possible to protect the surface of the blade with the protection protrusion 72 regardless of whether polishing is performed above the central portion of the grindstone or at other portions.
72 is approximately 6.35 to 1 above the normal position during polishing of a vertical blade surface
It is provided at a position of 2.7 mm (about 1/4 to 1/2 inch), and the distance d from the main surface of the grindstone to the tool guide device 50c is 1.524 (60/100
0 inch) can be projected, and the enclosure member 60c
Can be projected from a line transverse to the stop surface during polishing of the vertical blade surface of the blade. This protrusion 72 can be part of the enclosure member 60c as shown in FIG. 13 or can be separated without loss of function.

The urging action that a spring adds to the blade surface of a blade during polishing is
As described above, this can be realized by applying a force to the grindstone driving device and the supporting device to freely move the grindstone laterally and fixing the tool guide device. The same result can also be obtained by applying a biasing action and a restraining force to the tool guide device to hold the grindstone in a fixed position.

FIG. 5 shows the tool guide device 50a and the fixed grind 30a. Here, the guide device 50a freely slides laterally along the surface of the bottom plate 22a, but is pushed to the right by the compression spring 86 behind the tool guide device 50a. In use, as shown in FIG. 5, the surface of the blade 48a on the surface of the guide device is such that the surface of the guide device faces the surface of the grindstone until the vertical blade surface contacts the surface of the grindstone 30a. To descend. Further, instead of moving the guide device 50a to the left side in FIG. 5, some force is applied against the urging action of the compression spring 86 so that the lower blade surface comes into contact with the stop device 89. . Stop here 89
Is an extension of the guiding device on each side of the grindstone. The inclination of the upper surface of the stopping device 89 is usually parallel to the lower blade surface. Therefore, the angle formed by the upper surface of the stopping device 89 with respect to the main surface of the grindstone is substantially larger than the angle formed by the magnet 62a with respect to the main surface of the grindstone. When the lower blade surface is on the surface of the stop device 89, the position of the blade is stable and the force of the spring 86 all acts to hold the vertical blade surface against the grindstone 30a. When performing a polishing operation, it is possible to detect when the lower blade surface is engaged with the stop device 56a. The reason is that an even greater force must be applied to the blade in order to move the blade holding device 50a further beyond that point. The inclination of the upper surface of the stopping device 89 may be set to an angle substantially perpendicular to the blade of the cutting tool instead of the above-mentioned one so that a more limited stopping action can be obtained. The grindstone 30a in FIG. 5 is in a fixed position and does not move freely laterally parallel to the axis of rotation of the grindstone. When the blade 48a is removed, the guide member 50a moves to the right, and its movement distance is determined by the stop device 90 of the guide device, and this stop device 90 forms the rest position of the guide device 50a, and the guide device 50a of this blade device. Are not moved with respect to the surface of the magnet 30a rotating in a fixed position, and are separated and adjacent to each other with a limited gap 56a. Alignment of the tool guide device 50a with the grindstone 30a is maintained by a shaft 92 which moves through a bearing hole 94 in a support member 96, which supports member 96.
Is fixed to the bottom plate 22a. By using two or more springs and shafts, it is possible to improve the position and accuracy of free movement of the guide device. The stop 89 acts on the lower blade surface of FIG. 5, but must be positioned so that the vertical blade surface 70a can be aligned with the main surface of the grindstone during polishing. The hub 52a shown in the figure is the hub 52 of the blade polishing apparatus 20 shown in FIGS.
Works the same as. The angle θ is a polishing angle, and its value is larger than the angle formed by the surface 50a of the blade guide device and the grindstone 30a.
The angle γ in FIG. 5 is the angle formed by the surface of the blade guide device 50a and the line extending from the upper end of the blade surface 70 to the surface of the hub 52a.

The disk-type blade polishing apparatus improved from the embodiments shown in FIGS. 1 to 3 disclosed therein can quickly and quickly make a wide variety of blades into excellent blades without causing scratches, scooping or other damage. I explained that it is something that can be done. Further, it was explained that this polishing device has extremely less blade curling as compared with conventional grinding wheels, umbrella-shaped grindstones, hard natural stones, and other polishing devices having an unfavorable polishing action. Because of this rapid polishing action, excellent polishing, ease of use, and low burr, the disk-type blade polishing apparatus according to the present invention is a blade polishing apparatus that rotates a flat grindstone along a predetermined trajectory. If combined, an ideal blade polishing machine can be made. A blade polishing device that uses a flat grindstone is a device with high polishing power,
Comparing the cases where the grain sizes of the abrasive grains are the same, the polishing power is smaller than that of the disc type blade polishing apparatus according to the present invention. The disc type blade polishing machine uses abrasive grains having a relatively coarse grain size, that is, a grain size range of 100 to 180. The flat whetstone type blade polishing device is 0.00254 mm (1 / 10,000 inch) for the blade that has been polished by the disc type blade polishing device before finishing.
It can be sharpened to a thin blade with good sharpness. If the blade does not have a large curl, a flat grindstone type tool polishing device can be used for quick finish polishing. Although it is possible to use other conventional blade polishing apparatus to sharpen the blade before applying it to the flat grindstone type blade polishing apparatus, the improved disk type blade polishing apparatus is particularly excellent, and the reason is as described above. It is as follows.

In particular, when polishing a blunt or poorly finished blade, a new combination of the improved disc type blade polishing apparatus disclosed herein and the flat grindstone type blade polishing apparatus provides a medium-sized blade.
Can quickly and sharply finish on the order of 00254 mm (1 / 10,000 inch). The device shown in FIGS. 11 and 12 is
By combining the two new polishing methods into a single blade polishing device, this device can polish a blade as sharp as a razor blade with unprecedentedly high reliability and speed. be able to.

FIG. 11 and FIG. 12 exemplify the improved disc type blade polishing device in combination with the flat grindstone type blade polishing device. The bottom plate 22 (Fig. 12) supports a motor 24b, which is fixed to the bottom plate 22b by a spring or the like (not shown), and the shaft 26b on the left side of the motor 24b drives the grindstone holding device 28b. A grindstone 30b is attached to the grindstone holding device, and the grindstone 30b rotates at about 3000 RPM. The peripheral speed of this wheel should not exceed about 243.84 m / min (about 800 ft / min). The reason is to eliminate the risk of the blade heating. The fan 100 mounted on the shaft 26b cools the motor 24b. Air enters the blade polishing device through the annular portion 102 between the upper cover 104 and the lower cover 106, and the bottom opening 1 of the bottom plate 22b supported by the rubber legs 32bb.
It is discharged from 08 outside.

Vertical support members 34b, 112, 36b (Fig. 12) are held to the bottom plate 22b by a strong adhesive or screws (not shown) to support the upper horizontal support member 116, which is a blade. The guide device 118 is supported by the blade guide device bottom 120, which is fixedly held to the upper horizontal support member 116 by one or more screws as shown. The drive gear pulley 124 is mounted on the right armature shaft extension 44b (Fig. 12) and drives two gear pulleys 126 (only one is shown) synchronously. This synchronization is achieved by the timing belt 128 (tooth). Attached). The armature shaft extension 44b and shaft 130 are for mounting the gear pulley 126 and ride on a sleeve bearing 132 which is inserted into the vertical support members 112, 36b. A more detailed description is given in the same application mentioned above. 2 synchronous drive cranks 13
4 is machined at the end of the shaft 130 and enters a glass fiber-containing fluororesin bearing 138, which is inserted into a drive plate 136, and the crank is a drive plate.
Make 136 orbit. Fig. 12 shows 3 or more support bearings 1
39 shows two sets of support bearings consisting of 39 combinations, which support brackets 141, horizontal support members 116, and support devices.
It is held by 36b and slidably supports the drive plate 136, and holds the drive plate 136 in the vertical plane so that the moving distance in the vertical direction with respect to the vertical plane is minimized. An orbiting yoke 142 is attached to the drive plate 136 with a screw 140,
The yoke 142 has an upper arm 144.
An abrasive 146 having an orbital motion is attached to 144. With this structure, the orbital movement of drive plate 13 causes the abrasive material 146 to orbit.

The tool guide device 118 shown in FIGS. 11 and 12 includes a plastic structure 148 which includes a magnet 150 which attracts the surface of the tool and forms the guide surface of the tool. To do. The blade guide device 118 also includes a blade stop device 152 (FIG. 11). Guide device 50b is used with disc-shaped abrasive 30b and includes a plastic support structure 154 that extends to and contacts the surface of enclosure member 60b. This support structure 154 is a magnet 6
2b, the magnet 62b has a disc-shaped abrasive 3
Controls the angle made to 0b. The magnet 62b attracts the blade and establishes the surface of the blade which is basically the same as described with reference to FIG. When using this blade polishing device, the blade of the blade placed on the guide device 50b is engaged with the stop device 54b on the surface of the enclosing member 60b. The drive crank 134 can be integrally connected to the shaft 130 or separated from the shaft 130 as described above. As shown in FIG. 12, the motor 24b is provided with an axial gap between the armature and the shaft 26b of the motor 24b, which allows the grindstone 30b to move within the allowable movement range in the rotation axis direction thereof and receive the thickest blade to be ground. Must be The shaft 26b is shown on the right side of the motor as an armature shaft extension 44b. Suitably, the axial clearance is about 1.586 mm (1/16 inch) at the free end. This suitability is suitable for the grindstone 30b to move to the right in FIG. 12 and to receive almost all the blades without reaching the movement limit determined by the axial gap at the free end. Means that.

By this method, as shown in Fig. 12, the blade is guided by the guide device.
Inserted between 50b and the rotating disk-shaped grindstone 30b, this grindstone 30b moves to the right in the figure and floats against the biasing force of the spring 42b. The spring 42b applies the biasing force to the shaft extension 44b via the thrust bearing 46b, and this biasing force is transmitted to the shaft 26b and the grindstone 30b via the armature of the motor. If the motor armature does not have a suitable free end axis clearance, movement of the grindstone 30b causes the motor armature to move to an internal stop (usually a thrust bearing,
Grindstone 30b stops because it is pressed against (not shown),
Therefore, the rotating grindstone 30b exerts an excessive force on the blade, and this excessive force causes scooping or other physical damage to the blade of the blade. By adopting this spring system for connecting the stop device 54b on the 60 surface of the enclosing member and the guide device of the blade, the force applied to the blade of the blade during polishing is made relatively constant and the length of the blade is adjusted. Can be ground along with no engraving. Grinding stone enclosure member 60 at the lower left of Fig. 12
b is a structure that also serves as a safety cover of the stopping device 54b, but a shape that does not prevent the insertion of the blade between the grindstone 30b and the guide member 50b and does not prevent the blade surface from contacting the surface of the grindstone 30b. Is.

By combining the above two new types of blade polishing devices into one blade polishing device, a series of polishing can be carried out so that an unskilled person can sharpen a blade face having an extremely complicated shape or an extremely sharp blade. It is possible to embody a blade guide member that optimizes the angle θ. The polishing angle θ is determined by the surface of the guide device on which the blade is placed and the movement of the abrasive material shown in FIGS. 2 and 5. It has been found that in successive polishing steps the pre-polishing time can be significantly shortened and the blade of the tool can be reliably sharpened by making the polishing angle relatively large and carefully controlled. Although it is not a basic matter, the method of positioning and holding the blade at each polishing step is basically unified except for the case where the polishing angle of the blade is intentionally changed, and the blade guide device of the disc type blade polishing apparatus. It is preferable to simplify the steps of polishing with a blade polishing apparatus of the type described above and a method of causing a polishing agent to draw a predetermined trajectory.

Factory-produced cooking knives typically have a total grinding angle, for example, an angle at which the blade surfaces 70 of FIG. It is extremely rare for the owner of a blade to know the actual angle of the blade surface, so an actual polishing machine must have the ability to sharpen quickly and safely regardless of the blade angle when the blade was new. I have to. When sharpening the blade of a razor, the grain size of the abrasive must be made fine, and if made fine, the polishing speed will decrease. If the angle of the blade surface when the blade is new is known, and if the angle of polishing can be controlled, it is possible to use a fine-grained abrasive or to polish the blade surface 1-2 degrees larger than the angle when new. Since it can be done, the amount of polishing is reduced, and it is sufficient to polish only the part where the force is very close. However,
If you do not want to sharpen the blade when polishing many times,
Since the angle of the blade surface must be larger than before sharpening, the sharpened blade becomes dull. The present invention solves this problem for the first time and enables sharpening like a razor blade without knowing the angle of the blade surface when new. In this method of polishing, the first polishing is performed by roughening the abrasive grains with a disc type blade polishing device, then using a blade polishing device that causes a flat grindstone to draw a predetermined trajectory, the polishing angle is made smaller, It is realized by making the grain size fine, slowing down the speed of the grindstone, causing this grindstone to draw a unique orbit, and precisely sharpening the blade to a predetermined blade surface angle to finish it like a razor blade.

The advantages of the present invention in the case of actual polishing will be described with reference to FIG. In FIG. 6, the angle of the blade before polishing of the blade to be polished is 45 ° like most of the cooking blades (example), and the angle of the blade polished by the disc type blade polishing apparatus is the cutting blade. Shall be exactly the same. The angle of this blade is the angle formed by the two blade surfaces 70 of FIG. The polishing angle of the blade by the disk type blade polishing device must be smaller than the polishing angle of the blade by the orbit type blade polishing device. For convenience, this angle is set to 34 ° as shown in FIG. In order to do this, of course, the blade must be sharply cut, and this polishing is carried out by the disk type blade device, which is so-called in order to carry out this polishing quickly and with almost no curling of the blade. A grindstone with a grain size of 100 to 180 is optimal. If the blade angle before polishing is less than 34 °, use a disc type blade polishing device to adjust the blade angle to 34 °.
There is no need to set it to °. The blade sharpened to 34 ° is as shown in Fig. 7, and it is sharpened like a razor blade with one or several stages of polishing using an orbital type polishing device. When performing two-step polishing, it is possible to use a coarse grindstone that can be ground rapidly first, and then use a fine grindstone to finish the blade smoothly.

If two-step polishing with an orbital type polishing machine is illustrated, the blade shown in Fig. 7 is a blade that was polished to a full blade angle of 34 ° in the first polishing step. Grind up to 40 °. In the polishing at this stage, as shown in FIG. 7, only the portion of the blade surface near the tip of the blade is polished, and the polishing range is remarkably narrower than the polishing by the preceding disk type polishing apparatus. The blade that has been subjected to this polishing is shown in FIG. This blade has an angle of 34 ° near the ho and an angle of 40 °. In the final polishing step with the orbital polishing apparatus, a so-called grain size of about 600 to 1500 is used to further polish the portion in the vicinity of the cutting edge to 45 ° as shown in Fig. 9 (enlarged view).
Since this series of polishing can be performed by a single polishing device, if a high precision blade guide device is used and the polishing angle is gradually increased in successive angular polishing steps, the disk type The polishing device can be dedicated to grinding. Although the orbital type polishing device has a relatively small amount of polishing, it finely polishes a blade. Each polishing step is for quickly sharpening the blade and polishing completely like a razor. The shape of the blade after polishing in this example is shown in FIG.
This figure is greatly enlarged compared to FIG. 6 before polishing. First
The blade after polishing shown in Fig. 10 has three slopes along the blade surface 70, namely
It has a 34 °, 40 ° and 45 ° angled blade surface, and these three bevels come close to the blade edge in this order. Since the length of this 45 ° blade surface is extremely short, usually 0.762 mm (0.030 inch), use a fine-grained grindstone and use an orbital polishing device to quickly grind the blade without leaving any blisters. You can The fine burr of the blade is the blade of the orbital type polishing machine 146
It can be easily removed by pressing it against the tool stopping device 152 shown in FIG. When re-polishing a tool that has been once polished, as already explained, without using the disk-type polishing device, use a track-type polishing device that sets the angle of the blade surface to 40 ° and 45 °. It can be an excellent blade with excellent sharpness. After the above-mentioned series of polishing, or in the case of harsh usage, it is necessary to use a disk-type polishing apparatus to perform polishing at the small angle. The blade sharpened in this way has extremely excellent sharpness as compared with the blade sharpened by the conventional blade polishing apparatus. The exemplified highly polished blade has three very small inclined surfaces on the blade surface as shown in FIG. The sharpness of a blade equipped with a large number of minute inclined surfaces is good because the angle of the inclined surface decreases from the cutting edge toward the ho, so the angle near the ho is smaller than that immediately after the cutting edge, This is because the cut object easily moves or does not stick on the back surface of the cutting edge. Blades with suitable micro blade surfaces, such as those made by the present invention, can easily be very thinly shaved on the surface of the object to be cut. This is in contrast to the case where the blade is a plane consisting of only a single angle, which tends to crack the surface of the object to be cut or to tuck into the surface of the object.

From the above description, the novelty of combining the disc type blade polishing device and the orbit type blade polishing device into one device is clear. Even an extremely poorly sharp blade can be sharpened by an unskilled person and finished in the same manner as a razor blade with a thickness of about 0.0025 mm (1 / 10,000 inch).

14 and 15 show another embodiment of the present invention using a split type disc. This double disc is particularly convenient when polishing both sides of the blade of a blade from one side of the polishing apparatus. In this structure, two disc-shaped grindstones 30
d and 30d are held back to back on the drive shaft 26d and are separated from the stop device in the rest position by a biasing mechanism, said biasing mechanism comprising, for example, a spring 100, for pushing said two discs, Separate the whetstones. The two discs move along the axis of the shaft, the movement being limited on one side by a stop or pin 101 attached to the shaft and on the other side by a second disc or biasing mechanism. Each disc can move against the biasing device and toward the opposing disc, but whenever the blade to be polished is moving the disc grindstone against the biasing mechanism, the disc grindstone will move to the biasing mechanism. The limit of movement in the opposite direction must not be reached. The discs held by the stop can slide separately on a common shaft, but each disc is forced to rotate by the pin 101 at the same speed as the shaft. This pin is fixed or penetrated to the shaft and the slot portion of the hub of the disc grindstone.
Engaged in 102. The pin 101 can also act as a stop device for controlling the position of the disc grindstone in the rest position. Other devices that drive the disc grindstone as it slides on the shaft are:
It will be obvious to those skilled in this field. Each disc 30d, 30
The whetstone that is attached to the outer surface of d and rotates on the shaft 26d is
It is pressed against the blade surface by the force of a spring or other biasing device. The polishing speed at the time of polishing a given blade and a given shape of the grindstone is determined by the urging force and the speed of the abrasive grains of the grindstone.

Although not shown in FIG. 14, the stop (FIG. 2) extends well toward the disk to prevent over-insertion of the blade and supports the vertical blade surface of the blade. The stop 54 therefore limits the degree of blade insertion and limits the movement of the disk towards the spring.

The present invention may also be adapted to provide different types of polishing actions, such as rough polishing, finish polishing, or intermediate treatments, by mounting an appropriate number of disks on each shaft.

[Brief description of drawings]

FIG. 1 is a plan view of a disk type blade polishing apparatus improved according to the present invention, FIG. 2 is a sectional side view of the disk type blade polishing apparatus shown in FIG. 1, and FIG. 3 is a disk shown in FIG. FIG. 4 is a sectional side view of a die blade polishing apparatus taken along line 3-3, FIG. 4 is a sectional view of a typical double-edged blade, and FIG. 5 is a sectional view of another disk and blade guide apparatus according to the present invention. Fig. 6 is a cross-sectional view of a blade with a total blade angle of 45 ° and is 34 ° by a disc-type blade polishing device, and Fig. 7 shows a blade-type blade polishing device at the first stage with a total blade angle of 34 °. FIG. 8 is a cross-sectional view of a blade having a blade which has been polished to 40 ° by an orbit type blade polishing apparatus according to the present invention as the next step, and FIG. 8 is a disk type blade polishing apparatus according to the present invention and 34 degrees along the blade surface by the polishing of the orbit type blade polishing device
Fig. 9 is a cross-sectional view of a 40 ° blade, and Fig. 9 shows the blades at 34 ° and 40 ° along the blade surface. The second stage orbit type blade polishing machine polishes the blade to a total angle of 45 °. FIG. 10 is a cross-sectional view of a blade to be cut according to the present invention, which is carried out at 34 °, 40 ° and 45 along the blade surface by polishing with a disc type blade polishing device and polishing with a two-step orbit type blade polishing device. FIG. 11 is a sectional view of a tool which has become a finished blade surface by combining a disk-type tool polishing apparatus and a two-stage orbit-type tool polishing apparatus according to the present invention into a single tool polishing apparatus. Top view, 12th
The figure is a cross-sectional side view taken along the line 12-12 in FIG. 11 of an apparatus in which a disc type blade polishing apparatus and a two-step type orbit type blade polishing apparatus are combined into one blade polishing apparatus according to the present invention,
FIG. 13 is a side view of a tool guide device having a protrusion for preventing accidental abrasion of the surface of the tool, FIG. 14 is a side view of another embodiment of the present invention, and FIG. 15 is a view of the embodiment of FIG. FIG. 15 is a sectional view taken along the line 15-15. 20 …… Disk type polishing device, 22 …… Bottom plate, 24 …… Motor, 26 …… Shaft, 28 …… Grindstone holding device, 30 …… Grindstone, 34,36 …… Supporting member, 38, 40 …… Sleeve bearing , 42 ...
… Biasing device, 44 …… Armatia extension, 46 …… Thrust bearing, 48 …… Blade, 50 …… Blade guiding device, 52 …… Hub,
54 …… Stopping device, 56 …… Gap, 58 …… Housing, 60…
… Enclosure (housing), 62 …… Magnet, 66 …… Upper slope of blade, 68 …… Lower slope of blade, 70 …… Blade surface.

Claims (9)

[Claims] 1. A housing, a first polishing section and a second polishing section provided in the housing, a rotary shaft provided in the first polishing section, and a first disk attached to the rotary shaft. Abrasive particles applied to the surface of the first disk, a guide device for guiding a knife provided in the housing facing the surface of the first disk, and a pair of flat outer surfaces having abrasive particles. A polishing member of the second polishing section and a drive for driving the polishing member to impart a translational orbital motion to the polishing member, such that all of the abrasive particles have substantially the same in-orbital motion, A second polishing section guiding device that guides a knife provided in the housing so as to face each outer surface of the polishing member, and a blade polishing device. 2. A second disk mounted on the rotary shaft, the first disk, and both the first disk and the second disk are slidably mounted on the rotary shaft, and each disk is The disk has a back surface and a whole surface at right angles to the axis of the rotating shaft, the back surfaces of both the disks are provided to face each other, the front surfaces of the both disks are provided apart from each other, and are provided between the back surfaces. An repellant device actuating against both discs to bias the front surfaces away from each other and a sliding motion of both disc assemblies mounted on the rotating shaft and provided by the repellant device. A stop device and a slot provided on each of the both disks, which ends in front of the back surface and leaves a wall, and the stop device is attached to the rotary shaft. A pin affixed and positioned within each said slot, said pin stopping the movement of said discs when brought into contact with said wall and preventing said discs from rotating relative to said rotating shaft. 2. The blade polishing apparatus according to claim 1, further comprising a polishing device provided on the front surface, the both disks being rotated together with the rotary shaft. 3. A third polishing section, a polishing member provided in the third polishing section, and a polishing member of the third polishing section having a pair of flat outer surfaces having polishing particles, and the third polishing section. And a guide device for the outer surface of the third polishing part polishing member that forms a mirror image angle with each other.
The mirror image angle of the guiding device of the third polishing section is the first
The blade polishing device according to any one of claims 1 and 2, wherein the angle between the guide surfaces of the polishing section and the second polishing section is different. 4. The guide surface angle of the third polishing section is larger than the guide surface angle of the second polishing section, and the guide surface angle of the second polishing section is the guide surface of the first polishing section. The blade polishing device according to claim 3, which is larger than an angle. 5. An orbital velocity that does not exceed 244 m (800 ft) / min for each of the abrasive particles by each of the drive units that orbitally move the respective polishing members of the second polishing section and the third polishing section. The blade polishing apparatus according to claim 4, wherein 6. The blade polishing apparatus according to any one of claims 1 to 5, wherein the polishing particles are diamond particles having a flat surface as a whole. 7. A blade is brought into contact with a first guide surface inclined at a first polishing angle and placed in a first polishing portion of a housing, where abrasive particles on the surface of a disk assembly attached to a rotary shaft are used. A second face of the disc assembly attached to the rotary shaft, the blade face is brought into contact with the rotary shaft, the rotary shaft is rotated, the disc face is rotated to polish the blade, and the blade is removed from the face of the disc; The blade surface is brought into contact with the abrasive particles on the surface, the rotary shaft is rotated to rotate the second surface of the disk assembly to further polish the blade surface in advance, and the blade is provided on the inclined second guide surface. Are placed in the second polishing section of the housing so that the abrasive particles on the first surface of the polishing member are brought into contact with the blade surface, and the polishing member is subjected to translational orbital motion. Drive the polishing member, All of the abrasive particles move in substantially the same orbit to further polish the blade surface, remove the blade from the first surface of the polishing member, and provide another tilt guide for the second polishing section. The blade is brought into contact with the surface, at this time,
The blade surface abuts abrasive particles on the second surface of the polishing member, the other guide surface is inclined at a mirror image angle with respect to the second guide surface, and the mirror image angle is the one of the first polishing member. Different from the angle of the guide surface, the blade polishing method of moving the polishing member in the orbit while the blade contacts the other guide surface. 8. A second orbit driven polishing member having a polishing device having a third polishing portion having a guide surface forming a mirror image angle different from the mirror image angle of the second polishing portion, and having abrasive particles on the exposed surface. Abutting and orienting the blade surface, removing the blade from the second polishing section, bringing the blade into contact with the second polishing member, and bringing the blade into contact with one of the guide surfaces of the third polishing apparatus. Then, the second polishing member is rotatably moved in the track to give the second polishing member a motion in the track, remove the blade from the first guide surface of the second polishing section, and separate the third polishing section from the third polishing section. The blade is brought into contact with the guide surface of the first polishing member, the blade surface is brought into contact with the second polishing member, the second polishing member is moved in the orbit, and the first polishing member and the polishing member Intra-orbital motion gives each of the abrasive particles an orbital velocity not exceeding 244 m (800 ft) / min. The method for polishing a blade according to claim 7. 9. The blade polishing method according to claim 8, wherein the angle of the guide surface gradually increases from the first polishing section to the second polishing section and further to the third polishing section.