JP3375501B2 - Cutter polishing equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter polishing apparatus for polishing a cutter built in a rye apparatus. 2. Description of the Related Art Conventionally, in a wheat mill or the like, in order to cut wheat grains, a wheat mill 30 as shown in FIG.
Is used. This wheat cultivation apparatus 30 is provided with a number of slits 31 for aligning and dropping wheat grains input from above, and a rotary cutter 32 installed opposite to these slits 31. On the other hand, the cutter 32 has a structure in which a number of disk blades 34 are arranged on a support shaft 33 at equal intervals with the slit 31. Then, the barley that has fallen along the slits 31 is cut by each of the disk blades 34 that rotate together with the support shaft 33 that is driven to rotate, thereby performing the grain-raising operation. [0004] Incidentally, the disk blade 34 constituting the cutter 32 has a certain durability because it is a hardened SK material. It gradually wears out and its sharpness decreases. Therefore, it is necessary to polish the disk blade 34 periodically or as needed. However, in this case, since the disk blades 34 cannot be polished while the cutter 32 is mounted on the mulling apparatus 30, a large number of disk blades 34 are mounted on the support shaft 33.
The cutter 32 in the state where the
After removal from, polishing is performed. However, as shown in FIG. 3, the cutter 32 has a structure in which a disk-shaped disk blade 34 and a spacer 35 are alternately passed one by one through a support shaft 33 and fixed.
In the case of polishing, after removing the cutter 32 together with the milling device 30, all the disk blades 34 are separately removed from the support shaft 33, and then the disk blades 34 are set one by one in a polishing machine to perform polishing. I have. [0007] When the polishing of all the disk blades 34 is completed, the disk blades 34 and the spacers 35 are alternately and individually passed through the support shaft 33 and fixed one by one in the reverse procedure. It is attached to. As described above, in the conventional polishing method, it is necessary to disassemble the cutter 32 detached from the mulling apparatus 30, polishes the disk blades 34 one by one, and then reassemble. Therefore, a large amount of labor and time are required for the entire polishing operation. For example, in the case of the mulling apparatus 30 shown in FIG.
Since four are arranged, about ten hours are spent for polishing work including disassembly and assembly of the cutter 32. In the case of the conventional polishing method, the disk blades 34 are detached from the support shaft 33 and are polished individually one by one. Fix to 33 and cutter 3
Even when assembled as 2, the overall dimensional accuracy is poor.
Further, since the polishing operation of the disk blade 34 itself is difficult, only a skilled person can perform polishing. An object of the present invention is to provide a cutter polishing apparatus which can easily perform a polishing operation in a short time, has a sharp and uniform polishing state, and has excellent dimensional accuracy. is there. [0011] In order to solve the above-mentioned problems, the present invention provides a cutter polishing apparatus for polishing a disk blade of a cutter which is built in a mulling apparatus and has a structure in which a plurality of disk blades are arranged on a support shaft. an apparatus comprising gripping means for gripping the support shaft of the cutter, and rotating means for rotating the support shaft, the support
A disc-shaped grinding wheel that rotates in the direction opposite to the rotation direction of the shaft,
A transverse feed means for contacting and separating the disc- shaped grindstone from the cutter blade by actuation of the servomotor ;
Longitudinal feed means for moving the disc-shaped grindstone in the direction of the support axis by actuation, wherein the thickness of the disc-shaped grindstone is
It is characterized in that it is larger than the gap and that the outer periphery of the grindstone is wedge-shaped . A cutter having a structure in which a plurality of disk blades are arranged is gripped by a gripping means together with a support shaft, and is rotated by a rotating means. Then, at least one disk blade is polished by bringing the grindstone into contact with the disk blade of the rotating cutter, and when the polishing is completed, the grindstone is separated from the disk blade. After the completion of the polishing, the polishing is performed by moving the grindstone in the direction of the support axis by the feeding means, and again bringing the grindstone into contact with and separating from the unpolished disk blade. Less than,
By repeating such a process, the cutter in which a plurality of disk blades are arranged can be polished without being disassembled. The moving distance of the grindstone when the grindstone is brought into contact with or separated from the disk blade can be set in advance based on data such as the size of the grindstone, the diameter of the disk blade, and the polishing amount. In addition, by combining a sensor for detecting the position of the disk blade with a feeding means for moving the grindstone in the support axis direction, the grindstone can be automatically moved by a distance corresponding to the distance between the disk blades. Here, as a grindstone for polishing the disk blade, a rotationally driven disk-shaped grindstone can be used. By using a rotating disc-shaped grindstone, the whole grindstone abuts against the disk blade evenly, so that there is no variation in the polishing state, no loss of the grindstone, and the like. In this case, the thickness of the disk-shaped grindstone may be larger than the arrangement interval of the disk blades, and the outer peripheral portion may be wedge-shaped. If the outer peripheral portion of such a disc-shaped grindstone is inserted into the gap between adjacent disk blades, the wedge-shaped outer peripheral portion comes into contact with the disk blades on both sides, so that two surfaces can be polished at the same time. Further, since the wedge-shaped outer peripheral portion comes into contact with the disk blade, the blade edge of the disk blade is automatically ground to a sharp state. Further, the polishing may be performed by rotating the disk blade and the disk-shaped grindstone in opposite directions. By reversing the rotation directions of the two, burrs are hardly generated on the cutting edge, a sharp cutting edge can be formed, and the polishing efficiency is high. In this case, the rotation speed of the support shaft of the cutter is 50.
rpm ~ 250rpm, whetstone rotation speed is 2000rpm
適 正 3000 rpm is an appropriate range. Examples of the grindstone for polishing the disk blade include alundum abrasive, carborundum abrasive, and CBN.
A material containing at least one of abrasive grains and diamond abrasive grains can be used. Here, alundum means aluminum oxide, carborundum means crystalline silicon carbide, and CBN means cubic boron nitride. Although the disk blade made of the SK material subjected to the quenching process has a high hardness, the polishing can be efficiently performed by using a grindstone containing at least one of these abrasive grains. . Among them, CBN abrasive grains are particularly excellent in hardness and abrasion resistance, and thus are most suitable for polishing a disk blade. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a cutter polishing apparatus according to an embodiment, and FIG. 2 is an explanatory view showing a polishing step. The cutter polishing apparatus 10 of this embodiment is for polishing a cutter 13 having a structure in which a plurality of disk blades 11 are arranged on a support shaft 12. The cutter polishing apparatus 10 includes a headstock 14 and a tailstock 15 for gripping and rotating the support shaft 12 of the cutter 13, a disk-shaped grindstone 16 rotationally driven by a rotation shaft 19, and a disk-shaped grindstone 16.
Traversing means for contacting and separating the disk blade 11 of the third,
Longitudinal feed means for moving the disc-shaped grindstone 16 in the direction of the support shaft 12 is provided. In addition, the thickness 23 of the disc-shaped grindstone 16
Is larger than the arrangement interval 24 of the disk blades, and
a is formed in a wedge shape. As shown in FIG. 1, a plurality of disk blades 11
Are gripped by the headstock 14 and the tailstock 15 and rotated by the headstock 14 driven to rotate by the motor 20. On the other hand, the disc-shaped grindstone 16 is also rotated by the rotating shaft 19 connected to the motor 21. Then, as shown in FIG. 2, the disk-shaped grindstone 16 is moved by the transverse feed means, and the outer peripheral portion 16a is inserted into the gap between the rotating disk blades 11a and 11b, thereby to obtain the disk blades 11a and 11b. 11b is polished. At this time, since the wedge-shaped outer peripheral portion 16a simultaneously contacts the disk blades 11a and 11b on both sides, two surfaces can be polished at once. Also, an outer peripheral portion 1 formed in a wedge shape
Since 6a comes into contact with the disk blades 11a and 11b, the cutting edges of the disk blades 11a and 11b are automatically polished to a sharp state. When the polishing is completed, the disk-shaped grindstone 16 is separated from the gap between the disk blades 11a and 11b by the lateral feed means, and then moved in the direction of the support shaft 12 by the vertical feed means. Blade 11b, 1
The outer peripheral portion 16a of the disc-shaped grindstone 16 is inserted into the gap 1c to perform polishing. Hereinafter, by repeating such a process, the plurality of disk blades 11 can be sequentially polished. In this case, since the cutter 13 on which the plurality of disk blades 11 are arranged is polished without being disassembled, the polishing operation is completed in a short time and the polishing state is uniform. Also,
Since the polishing can be performed only by alternately operating the horizontal feeding means and the vertical feeding means, the polishing work of the cutter 13 is simplified. Here, the transverse feed means for bringing the disc-shaped grindstone 16 into contact with and separating from the disk blade 11 of the cutter 13 is operated by an AC servomotor, and the longitudinal feed means for moving the disc-shaped grindstone 16 in the direction of the support shaft 12. Is operated by an air cylinder. The moving distance when the disc-shaped grindstone 16 is brought into contact with or separated from the disc by the lateral feed means may be set in advance based on the diameter of the disc-shaped grindstone 16, the diameter of the disk blade 11, the polishing amount, and the like. it can. Further, since the sensor for detecting the position of the disk blade 11 is incorporated in the vertical feeding means, the disk-shaped grindstone 16 can be automatically moved by a distance corresponding to the interval between the disk blades 11. With such a configuration, the polishing operation can be fully automated, so that the cutter 13 can be easily polished even by a non-expert. Further, by using the disk-shaped grindstone 16 rotated and driven by the motor 21 as the grindstone for grinding, the whole grindstone uniformly abuts against the disk blade 11, so that the polishing state varies. No wrecking or whetstone loss occurs. Further, the cutter polishing apparatus 10 of the present embodiment
Then, as shown in FIG.
And the rotating shaft 19 of the disc-shaped grindstone 16 is rotated in the opposite direction to perform polishing. By making the rotation direction opposite in this way, the burrs of the cutting edge hardly occur, a sharp cutting edge can be formed, and the effect of high polishing efficiency can be obtained. When the support shaft 12 of the cutter 13 and the rotating shaft 19 of the disc-shaped grindstone 16 are polished by rotating in the same direction, burrs of the cutting edge are easily generated, and the above-described effect is obtained. Absent. When performing the polishing operation, the rotation speed of the support shaft 12 of the cutter 13 is 50 rpm to 250 rpm, and the rotation speed of the rotation shaft 19 of the disc-shaped grindstone 16 is 2,000 rpm to 3000 rpm.
rpm is an appropriate range, but in this embodiment, the support shaft 1
2 is about 160 rpm, and the rotation number of the rotating shaft 19 is about 2700 rpm. As a result, no burrs are generated on the cutting edge of the disk blade 11, a sharp cutting edge can be formed, and an abnormal load is not applied to the disk-shaped grindstone 16 or the like, and a high polishing efficiency can be obtained. In this embodiment, the disk blade 11
Is a hardened SK material.
Used are those containing CBN abrasive grains. Thereby, the efficiency of the polishing operation is improved, and abnormal wear of the disc-shaped grindstone 16 does not occur. Since 60 disc blades 11 are arranged on the cutter 13 of this embodiment, when the cutter 13 is polished by a conventional polishing method, the polishing operation takes about 10 hours. When the apparatus 10 is used, the time required for the polishing operation is only about 2 hours, so that the operation time can be greatly reduced. According to the present invention, the following effects can be obtained. (1) In a cutter polishing apparatus for polishing a cutter having a structure in which a plurality of disk blades are arranged on a support shaft, a gripper for gripping the support shaft of the cutter, a rotating device for rotating the support shaft, By providing a grindstone capable of contacting and separating from the disk blade and a feeding means for moving the grindstone at regular intervals in the direction of the support axis, polishing can be performed without disassembling the cutter. Therefore, the polishing operation can be completed in a short time, the polishing state is uniform, and the dimensional accuracy after polishing is improved. (2) When the disk blade is polished by using the disk-shaped grindstone that is rotationally driven, the entire grindstone uniformly contacts the disk blade. There is no loss of the product. (3) The disk blade is polished using a disk-shaped grindstone having a thickness larger than the arrangement interval of the disk blades and having a wedge-shaped outer peripheral portion, thereby simultaneously polishing the two cutting edges in a sharp state. Therefore, the efficiency of the polishing operation is improved. (4) By polishing the disk blade by rotating the disk blade and the grindstone in opposite directions, the polishing efficiency is high, the burrs of the blade are hardly generated, and a sharp blade can be formed. effective. (5) The grinding work for grinding the disc blade contains at least one of alundum abrasive, carborundum abrasive, CBN abrasive, and diamond abrasive. The efficiency of grinding is improved, and the wear of the grindstone is also reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a cutter polishing apparatus according to an embodiment. FIG. 2 is an explanatory view showing a polishing step by the cutter polishing apparatus. FIG. 3 is a perspective view showing a grain-mining apparatus. [Description of Signs] 10 Cutter polishing apparatus 11, 11a, 11b Disk blade 12 Support shaft 13 Cutter 14 Headstock 15 Tailstock 16 Disc-shaped grindstone 16a Outer peripheral portion 19 Rotating shaft 20, 21 Motor 23 Thickness of disc-shaped grindstone S24 Arrangement interval of disk blades

Claims (1)

(1) A cutter polishing apparatus for polishing a disk blade of a cutter which is built in a rye apparatus and has a structure in which a plurality of disk blades are arranged on a support shaft, wherein the cutter supports the cutter. Gripping means for gripping a shaft, rotating means for rotating the support shaft, and a disk-shaped rotating in a direction opposite to the rotation direction of the support shaft
Grinding wheel and the disk-shaped grinding wheel by the operation of AC servomotor
The contact with the disc blade of the cutter, lateral sender to separation
Comprising a stage, and a vertical feed means for moving the disc-shaped grindstone by actuating the air cylinder to the support axis, the disc
The thickness of the whetstone is greater than the spacing between the disk blades
A cutter polishing apparatus, wherein an outer peripheral portion of the whetstone is wedge-shaped .