JPS63300855A - Belt polishing device - Google Patents

Abstract

PURPOSE:To smoothly polish the recessed R part of a product to be polished, by interposing an endless back-up belt whose outer peripheral part has a projecting R form corresponding to the recessed R part of the product to be polished, between a contact wheel, idle wheel, and a polishing belt. CONSTITUTION:A back-up belt 5 is shaped to a projecting R form corresponding to the recessed R part W1 of a product W whose outer peripheral part is to be polished, and laid between a contact wheel 1, tension wheel 3, and an idle wheel 2, and revolves following a polishing belt 6 laid between the wheels 1 and 2 and a tension wheel 4. The polishing belt 6 is curved to the projection R form along the outer peripheral shape of the back-up belt 5 between the wheels 1 and 2, and receives the recessed R part W1 of the product W by the rectilinear back-up of the back-up belt 5 and polishes said recessed R part. Therefore, the recessed R part of the product can be smoothly polished.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a belt polishing bag for polishing a concave R-shaped portion of a product, in particular.

(Prior Art) The schematic structure of this type of polishing apparatus is shown in the perspective view of FIG. 5 and the sectional view of FIG. 4) A polishing belt 106 such as sand vapor, which is an abrasive cloth material, is wound between a large diameter contact wheel lot formed in a convex R shape (arc shape) corresponding to W+ and a small diameter idle wheel 102. Ru.

In this polishing apparatus, when the contact wheel 101 is driven to rotate in the direction of the arrow shown in the figure, for example, by a motor, the polishing belt 106 wound around the contact wheel 101 and the idle wheel 102 is driven in the same direction. Alternatively, the portion of the abrasive belt 106 that is wound around the contact wheel 101 (the length portion) is curved and deformed into the same shape (arc shape) along the convex R shape of the outer periphery of the contact wheel 101. Therefore.

As shown in the figure, the concavity Rm W I of the product W is
The part wrapped around the contact wheel 101 of No. 6 (
If you press it against the vertical part), the concave RM W of the product W
+ is polished by a polishing belt 106.

(Problem to be solved by the invention) However, in the above-mentioned conventional belt polishing device,
The part that can be polished is the arc-shaped part (cross-length part) of the polishing belt 106 wrapped around the contact wheel 101.
Therefore, the concave R portion W of the product W is the abrasive belt 10.
There was a problem that the concave R portion W could only be polished smoothly.

The present invention has been made in view of the above-mentioned problems, and its object is to provide a belt polishing device that can smoothly polish the concave R portion of a product.

(Means for Solving the Problems) In order to achieve the E2 objective, the present invention provides a belt grinding device configured by winding an endless abrasive belt between a contact wheel and an idle wheel. The present invention is characterized in that an endless backup belt formed in a convex R shape corresponding to the concave R portion of the product to be processed is interposed between the contact wheel and idle wheel and the abrasive belt.

(Function) Therefore, the backup belt rotates following the abrasive belt, or the abrasive belt rotates inside the abrasive belt, even in the straight line between the contact wheel and the idle wheel other than the part where the contact wheel is wound. Since it curves into a convex R shape along the outer circumferential shape of the backup belt that rotates at the same time, if the concave R part of the product is polished with the straight line part of the backup belt, the concave R part of the product will face the polishing belt. Polished smooth on contact.

(Example) Embodiments of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a perspective view showing the basic configuration of a belt polishing device according to the present invention, and FIG. 2 is a sectional view of the contact wheel portion of the device. The outer periphery of the contact wheel l has a concave arc groove 1
The contact wheel l is directly connected to a motor (not shown) as a driving source. A small-diameter idle wheel 2 is rotatably provided at approximately the same height as the contact wheel 5 and is spaced apart from the contact wheel 5, and is located approximately midway between the contact wheel 1 and the idle wheel 2. And on the r side of these, there is also a tension wheel 3 with a small diameter.
They are arranged in a rotatable manner. In addition, on the outer periphery of the idle wheel 2 and the tension wheel 3,
Concave arcuate groove 2a on the outer periphery of the contact wheel l
.

3a is formed.

Therefore, between the contact wheel 1, the idle wheel 2, and the tension wheel 3.

An O-ring-shaped backup belt 5 made of an elastic material such as rubber is wound around, and furthermore, on the outside of the backup belt 5, between the contact wheel l, the idle wheel 2, and the tension wheel 4, An endless abrasive belt 6 such as a sand vapor belt is wound around the belt. That is, the backup belt 5 is interposed between the contact wheel l, the idle wheel 2, and the grinding belt 6.

Next, the operation of this belt polishing device will be explained.

When the contact wheel 1 is rotated in the direction of the arrow shown by a motor (not shown), the backup belt 5 and polishing belt 6 wound around the contact wheel 1 also rotate in the same direction, and the idle wheel 2 and the tension wheel 3.4 are rotated in the same direction. also rotate in the same direction.

Therefore, the part of the abrasive belt 6 that overlaps with the backup belt 5, that is, the part wrapped around the contact wheel l, and the straight part between the contact wheel 1 and the idle wheel 2 (the part with a long length) Since the concave R portion W1 of the product W is curved in a convex R shape following the outer peripheral shape of the backup belt 5, the polishing belt 6
When the product W is pressed against the straight line portion (length L portion), the concave R portion W1 of the product W comes into surface contact with the polishing belt 6 and is polished smoothly. In addition, in this belt polishing device, if several types of back-up belts 5 with different cross-sectional outer diameters are prepared, it is possible to handle products with different dimensions of the concave R portion. It is possible to make polishing equipment more versatile.

Next, a concrete example of the wooden belt grinding apparatus will be described based on the third [Z and FIG. 4].

Figure 3 is a side view of the belt polishing device, Figure 4 is I of Figure 3.
This is a cross-sectional view taken along the V-ff line. In the figure, 11 is a base, and the base 11 supports a main body 12 so as to be rotatable up and down on a support shaft 13, and the main body 12 and the base Platform 11
An air cylinder 14 for vertically rotating the main body 12 around a support shaft 13 is interposed between them. In addition, the main body 12
is in contact with a stopper 15 protruding from one end of the base 11 to maintain the illustrated posture.

In addition, a drive shaft 16 is rotatably inserted into the main body 12, and idle wheels 23, 2□ are connected to both ends of the drive shaft 16. A V-pulley 17 is connected to the inside of the wheel 2□. The motor 18 installed on the base ll
The V pulley 19 and the V boo 91 connected to the output shaft end of the
A V-belt 20 is wrapped between the legs.

Furthermore, the main body 12 has a rotating shaft 21 . ．． 212.

22,. The rotation shafts 21.
．． 212, 22. ．． 22□.

23. Contact wheels 11, 12 . Tension wheel 3. .

3□, 41.42 are tied. Then, contact wheel 11, idle wheel 2. And between the tension wheels 31, there is an endless backup belt 5. whose outer part has a convex R shape with a radius of curvature RI. An endless backup belt 5□, whose outer periphery has a convex R shape with a radius of curvature R2, is wound between the other contact wheel 12, idle wheel 22, and tension wheel 32. In addition, in the embodiment, the backup belt 5. The radius of curvature R1 of the backup belt 5 is set to be thicker (R,>R,) than the radius of curvature R2 of the other backup belt 5□. Furthermore, the contact wheel 11, the idle wheel 2. A wide abrasive belt 61 is wound between the contact wheel 12, the idle wheel 2□, and the tension wheel 4□, and a narrow abrasive belt 6□ is wound between the contact wheel 12, the idle wheel 2□, and the tension wheel 4□. In addition, tension wheels 3, . 3. is adjustable up and down in its position with respect to the main body 12, and
The tension wheels 49, 4□ are connected to the main body 12 by the bin 24.
+, an arm 25. rotatably pivoted at 24a; ．．
252, and these are provided at the end of the spring 252.
6. 26□ biases the polishing belts 64, 6□ in the direction of tension.

Thus, the idle wheel 21.2 is driven by the motor 18.
When □ is rotated, the backup belts 51, 52 and polishing belts 61+62 are driven in the same manner as described above, and each polishing belt 6, . 62 are contact wheels 1, respectively.
．． and idle wheel 25, contact wheel 12
and the idle wheel 2 □ (the length L portion indicated by 1"J) is curved into a convex R shape with a radius of curvature R, , R, along the outer peripheral shape of each backup belt 5., 5. death,
Therefore, by pressing the concave R portions of a product (not shown) against the straight portions of these backup belts 5+, 5t, the concave R portions of the product with curvature radii R, , R, can be polished smoothly.

Note that the air cylinder 14 is driven to move the main body 12 to the support shaft 13.
By rotating the polishing belt 6, . 6.
In particular, if a pressure regulating valve is provided in the compressed air supply system to the air cylinder 14 and the pressure of the air supplied to the air cylinder 14 is adjusted steplessly to the product to be polished. The pressing force of the polishing belts 61, 62 on the product is also adjusted steplessly, thereby making it possible to polish uniformly over the entire surface of the product.

(Effects of the Invention) As is clear from the above description, according to the present invention, in a belt polishing device configured by winding an endless polishing belt between a contact wheel and an idle wheel, the outer periphery of the belt polishes the product to be polished. An endless back-up belt formed in a convex R shape corresponding to the concave R portion is interposed between the contact wheel and idle wheel and the abrasive belt, so that the abrasive belt is partially wrapped around the contact wheel. The straight line between the contact wheel and the idle wheel is also curved into a convex R shape along the outer circumferential shape of the backup belt that rotates inside the abrasive belt together with the abrasive belt, and the concave R part of the product is curved into the shape of the backup belt. If the straight portions are polished, the concave R portions of the product will come into surface contact with the polishing belt and be polished smoothly.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the basic configuration of a belt polishing device according to the present invention, FIG. 2 is a sectional view of the contact wheel portion of the same device, and FIG. 3 is a specific configuration of the belt polishing device according to the present invention. 4 is a sectional view taken along the line IV--IV in FIG. 53, FIG. 5 is a perspective view of a conventional belt polishing device, and FIG. 6 is a sectional view of the contact wheel portion of the conventional device. 1, It, 12...Contact wheel, 2゜:2
+, 22... idle wheel, 5, 5. . 52...Backup belt, 6,6. ．． 6. ...
polishing belt. Patent applicant: Yamaha Motor Co., Ltd. Agent
Patent Attorney Chosuke Yama - Figure 2 Figure 3 Iy-1ll Figure 4

Claims (1)

[Claims] In a belt polishing device constructed by winding an endless polishing belt between a contact wheel and an idle wheel, an endless backup belt whose outer periphery is formed in a convex R shape corresponding to the concave R part of the product to be polished is used. A belt polishing device characterized in that a belt is interposed between the compact wheel, the idle wheel, and the polishing belt.