JPS6279958A - Grinder - Google Patents

Abstract

PURPOSE:To efficiently work a workpiece free from damages by arranging an apparatus for feeding workpieces, a plurality of guide rails, and rotary grindstones, along the guide rails in the captioned apparatus for continuously grinding the workpieces in plural rows. CONSTITUTION:A plurality of grindstones 1 for grinding the front and back surfaces are loaded in plural rows onto a belt conveyor 2. In front of the belt conveyor 2, a guide rail 3 for guiding the grindstone 1 in slidable ways is arranged, and a rubber roller 4, grinder 5 for grinding the outer surface, grinder 6 for grinding the inner surface, etc. are arranged in accordance with the shape of a workpiece along the guide rail 3. The rubber roller 4 compulsorily pushes and grindstone 1 into the grindstone row at the front, and feeds the materials so that the front and rear parts, are set contiguous. Therefore, the trouble of cutting of the corner part during polishing is prevented. Since the captioned apparatus permits the continuous and automatic work, high efficiency is achieved, and the dangerous work by man power can be eliminated.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a grinding device, and more particularly, to a highly efficient grinding device that can grind multiple rows of workpieces continuously and simultaneously. Regarding.

(Prior art and problems) Workpiece 1 For example, a magnet manufactured by powder metallurgy,
In particular, ferrite magnets are manufactured by pulverizing a raw material whose main raw material is iron oxide, molding it by pressing under a magnetic field, sintering it in a tunnel furnace, and subjecting it to processing such as polishing.

In general, this type of magnet is small, and many have shapes that are unstable when placed, such as a flat shape, an arcuate shape, or a half-moon shape. Furthermore, they are easily damaged by impact, so they must be handled with great care. Attention is being paid.

In particular, when polishing the front and back surfaces of a magnet with a rotary grindstone, it is necessary to feed the magnets one after the other in succession, taking into consideration their tendency to damage. In this regard, conventional methods have relied on manual work such as aligning the magnets in a desired direction and pushing them in, which is inefficient and dangerous. Furthermore, even if the processes before and after the polishing process (in the case of grindstones, press forming, sintering, cleaning, and drying processes) are automated at high speed, this polishing process becomes a bottleneck and hinders productivity improvement. .

Incidentally, such a situation is not limited to the case of the illustrated magnet, but is often observed in the grinding process of other workpieces.

(Objective of the Invention) As mentioned above, an object of the present invention is to automatically and extremely efficiently grind a workpiece without damaging the workpiece, such as polishing a sintered magnet. An object of the present invention is to provide a grinding device which can perform a grinding process and which does not involve dangerous work.

(Structure of the Invention) In order to achieve the above purpose, the present invention uses a feed method in which workpieces are fed adjacent to each other before and after each discrimination in order to simultaneously grind a large number of workpieces in a plurality of rows continuously. This apparatus is characterized by comprising a device, a plurality of guide rails that guide and slide each row to be fed, and rotating grindstones arranged along each guide rail.

The present invention will be explained in detail below based on illustrated embodiments.

(Example) Fig. 1 is a side view schematically showing a grinding device according to an embodiment of the present invention, in which a sintered arc-shaped or half-moon-shaped magnet is used as a workpiece, and its front and back surfaces are polished with a rotating grindstone. This is an example of polishing.

During the four rounds, the magnets 1 are placed in multiple rows (two rows in this example) on the belt conveyor 2 by a separate feeder (not shown).

In front of the conveyor 1 to the bell 1, as shown in FIG. 2, there is a guide rail 3 that guides and slides each row of magnets 1.
are arranged along each guide rail 3, a rubber roller 4, a grindstone 5 for grinding the outer surface, a grindstone 6 for grinding the inner surface, and a grindstone for finishing the outer surface and a grindstone for seat grinding (none of which are shown). etc. are arranged according to the shape of the workpiece.

The rubber roller 4 forcibly pushes the magnets 1 of each row fed onto the guide rail 3 into the front row of grinding wheels, and feeds the magnets so that the magnets 1 are adjacent to each other in the front and rear phases, as shown in Fig. 1. shows a pair of upper and lower rubber rollers, but it is also possible to use only the upper one. Also.

A rubber roller may be provided for each discrimination, or a common rubber roller may be provided. In any case, the feeding speed of the rubber roller 4 is determined in accordance with the grinding speed of the front grindstone. Note that it is desirable that the feeding speed by the belt conveyor 2 be slightly faster than the above-mentioned feeding speed.

As shown in FIG. 3, the guide rail 3 includes guide portions 3' having a number of recesses corresponding to the feeding rows of magnets 1, and the longitudinal center line of these guide portions 3' is aligned with the center line of the rotating grindstone. It should be approximately the same as the center line in the width direction. In addition, when the rubber roller 4, the grindstone 6 for internal grinding, etc. are disposed below along the guide rail 3, the guide rail 3 Needless to say, a cutout may be provided in a portion.

The outer surface grinding wheel 5 is a pair of rotary grindstones each having a grinding surface on the outer periphery having a shape that matches the outer surface of the magnet 1, and is mounted on the same drive shaft 7 via a spacer collar.

These grindstones 5 are rotated in the opposite direction to the rotation direction of the rubber roller 4 to perform polishing, but since the magnets 1 are fed adjacent to each other in the front and back, the corners may be chipped or dropped. No damage will occur. If there is a possibility that the magnet array may be lifted between the rubber roller 4 and the grinding wheel 5.6 due to a defect in the shape of the magnet 1, etc., a lifting prevention bar 8 may be provided as shown in FIG.

The internal grinding wheel 6, like the external grinding wheel 5, is made up of a pair of rotating grindstones mounted on the same drive shaft, but the grinding surface has a shape that corresponds to the internal shape of the magnet 1, and a guide rail. 3, the magnet 1 receives an upward force during polishing, so a presser roller 9 or lifting prevention guide (not shown) is provided on the upper side. It is rotated in the same direction as 5, but
The presser roller 9 is rotated in the same direction as the rubber roller 4.

Furthermore, if additional grindstones are to be provided depending on the shape of the workpiece, it can be designed in a similar manner.

It goes without saying that grinding oil is used during grinding, and appropriate guide members (for example, A side guide) may also be provided.

(Effects of the Invention) As detailed above, according to the present invention, grinding can be carried out continuously and automatically by feeding workpieces in multiple rows, resulting in extremely high efficiency and No dangerous manual work is required. It is particularly suitable for simultaneous grinding of workpieces that are small and have unstable shapes, such as sintered magnets. It is also possible to increase the speed by synchronizing the processing steps before and after.

[Brief explanation of drawings]

Fig. 1 is a side view schematically showing a magnet grinding device according to an embodiment of the present invention, Fig. 2 is a plan view of the above-mentioned grinding device, and Fig. 3 is a perspective view showing a state of magnet grinding with a rotary grindstone. . 1... Work material, 2... Belt conveyor,
3... Guide rail, 4... Rubber roller, 5
．． 6... Rotating grindstone, 8... Lifting prevention bar, 9
...presser roller. Figure 1 Figure 3

Claims (1)

[Claims] In a grinding device that simultaneously grinds a large number of workpieces in multiple rows, there is a feeding device that feeds the workpieces in multiple rows adjacently in front and back of each row, and a grinding device that is connected to the feeding device. 1. A grinding device comprising: a plurality of guide rails that guide and slide workpieces in each row; and a rotating grindstone disposed along each guide rail.