JPS6144627B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for pressing a product against a rotating abrasive material to remove burrs generated in the product.

Generally, a product after press working will curl along the cut edge due to shearing and breaking effects.
Since burrs impede the functionality of the product, they are usually removed, and conventionally, belt-type grinders, which have a simple structure and are inexpensive, have often been used as devices for removing burrs.

This belt-type grinding machine has two types: one type that presses the surface where the burrs are generated on the running grinding belt by input to remove the burrs, and the other type that fixes the product with the magnetic force of a magnet and passes under the grinding belt to remove the burrs from the top surface. Two types of return formats are known.

In the former case, because the product is pressed manually, it is difficult to press the product evenly, resulting in uncut edges and carving into the product itself (hereinafter referred to as chipping).

The latter uses magnetic force to attract and fix the product,
If there are undulations, such as in a product after press processing, the attraction is unstable and it cannot be fixed securely, causing the product to tilt during grinding and cause chipping.

In this way, both types have the problem of one-sided cutting,
Products with chipping caused by these machines were defective products that did not fulfill their functions.

Some of these defective products were reworked and used, but many were discarded, resulting in a problem of increased manufacturing costs.

SUMMARY OF THE INVENTION In view of the above-mentioned problem of chipping in conventional belt-type grinders, it is an object of the present invention to provide an improved scraping device that can remove scraps from a product without chipping.

This object is achieved by a return device according to the claims.

Examples of the present invention will be described below.

In Figures 1, 2, and 3, 2 is the abrasive material 1
It is a rotating cylinder lined with As the abrasive material 1, abrasive grains or a grinding belt are used.

The rotating cylinder 2 has a downwardly directed boss 19 at its base, and this boss 19 is provided with a pulley 21 and a support plate 22.

The rotating barrel 2 is housed in the fixed barrel 5, and its boss 19 is fitted into a bearing 20 on the base of the fixed barrel 5, so that the rotating barrel 2 can rotate relative to the fixed barrel 5. There is.

Rotating shaft 2 of the electric motor provided on one side of the fixed cylinder 5
4 is fitted with a pulley 25.

In addition, since the belt 3 passes through the window 23 made in the fixed cylinder 5 and is applied to the pulley 21 and the pulley 25, the rotating cylinder 2 is connected to the rotary cylinder 2 by the electric motor 4 via the belt 3 shown by the arrow B in FIG. driven in the direction.

A cover 7 is provided on the fixed cylinder 5, the center of the cover 7 is bent downward, and there is a gap 6 between the cover 7 and the abrasive material 1.
is provided.

A hole 8 and a hole 9 are drilled in the upper part of the cover 7, and a charging tube 15 is fixed above the hole 8 in communication with the hole 8, and a charging tube 15 for introducing the product 18 at the interval 6 is provided below the hole 8. A plate 10 is provided.

Further, a discharge pipe 17 is fixed above in communication with the hole 9, and a discharge plate 11 is provided below the hole 9 for picking up products 18 from the interval 6.

Another hole 26 is drilled in the upper part of the cover 7,
Shaft 1 installed across this hole 26
3 is fixed to the cover 7 by a support plate 27.

An arm 12 serving as a member for suppressing the rotation of the product 18 is swingably supported around the shaft 13, and its lower portion faces the gap 6.

Further, one end of a spring 14 disposed between the upper part and a fixing member 16 provided on the cover 7 is engaged, and the force of the spring 14 causes the arm 12 to
is biased to the right in FIG.

Hereinafter, the operation when the product 18 is introduced will be explained.

The product 18 input from the input machine 15 is transferred to the input plate 10.
At the same time, the rotary cylinder 2 is introduced into the space 6 by
Due to the low resistance of the abrasive material 1 being rotated by the rotating cylinder 2 and the centrifugal force generated on the product 18 as the rotating cylinder 2 rotates, the product 18 comes into close contact with the inner peripheral surface of the rotating cylinder 2 and becomes integral with the rotating cylinder 2. Then, it starts rotating in the direction of arrow B in FIG.

The product 18 reaches the arm 12 after an appropriate period of time after starting rotation, but the arm 12 is suspended from the shaft 13 and is biased by a weak spring to slightly suppress the product 18 from moving. arm 1
A relative movement is temporarily generated with respect to the instantaneous rotating cylinder 2 in contact with the cylinder 2.

At this time, grinding is performed and burrs are removed, but during this grinding, the product 18 is pressed evenly against the abrasive material 1 by centrifugal force, so it does not tilt, and no chipping occurs during grinding. Does not occur.

At the same time as the grinding is being carried out, the product 18 pushes up the arm 12 against the bias of the spring 14.
2 and continues rotating, and when it reaches the discharge plate 11, it is immediately scooped up and quickly discharged through the discharge tube 17.

It is often necessary to change the return time depending on the size of the return that occurs in the product. In this case, for example, the spring constant of the spring 14 may be increased to lengthen the time during which the product rotation is suppressed. In this case, the time required to return the material becomes longer, and large defects can be removed.

As described above, the rotary cylinder 2 lined with the abrasive material 1 is rotatably provided on the fixed cylinder 5, and a gap 6 is provided between the cover 7 provided on the fixed cylinder 5 and the rotary cylinder 2. Since the arm 12, which has an arm 12 and is biased by a spring 14, is inserted into the space 6, the product introduced into the space 6 is brought into close contact with the inner circumferential surface of the rotary cylinder 2 by centrifugal force, and is not ground. The product rotates due to the frictional resistance of the material 1, and the rotation is suppressed by the arm 12.The product is ground by the relative movement between the product and the abrasive material 1, and burrs are removed. Because it is fixed, no chipping occurs.

In addition, this prevents the production of defective products, reducing the number of man-hours for rework and preventing cost increases due to product disposal.

Although specific embodiments of the present invention have been described above, the embodiments are not limited thereto.

For example, the rotation axis of the rotating cylinder may be horizontal.
However, the size of the rotating cylinder must be sufficiently larger than the product, and the product must have a flat surface.

Further, the rotary cylinder is held by the fixed cylinder without the need to provide a boss, and general support means that can rotate at high speed may be used.

The fixed cylinder does not need to be a cylinder, and may be a frame that supports the rotating cylinder and the cover.

On the other hand, the input device and the discharge device are not limited to rectangular cross sections, and their shapes should be selected so that the product can be introduced and discharged without any trouble.

Further, the arm 12 does not need to be pivoted and biased by a spring, and a shock absorber or cushion may be replaced with a spring-loaded arm to suppress the movement of the product.

Furthermore, it is also possible to provide a plurality of arms 12.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a top view, and FIG. 3 is a sectional view taken along arrow A in FIG. DESCRIPTION OF SYMBOLS 1... Abrasive material, 2... Rotating cylinder, 5... Fixed cylinder, 7... Cover, 12... Arm, 15... Inserting machine, 17... Discharging machine.

Claims (1)

[Claims] 1. A rotary cylinder lined with abrasive material and rotatably supported, a stationary cylinder folded inside the rotary cylinder so as to have a gap with the rotary cylinder, and a surface to be cut on the rotary cylinder. a loading device for loading the product so as to face the inner surface of the rotating cylinder; a discharging device for taking out the product; and a member facing the gap so as to suppress the scraping.