JPH012865A - Dressing method for abrasive belt in belt sanding machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for dressing an abrasive belt in a belt abrasive machine.

[Prior Art] Due to the characteristics of abrasive belts, as shown in Fig. 2, after the start of polishing with a new abrasive belt (within a polishing length of several tens of meters), the roughness of the polished surface rapidly becomes finer. The roughness becomes finer with each stroke. Therefore, if you use a new abrasive belt with the same roughness as the 11 standard roughness of the polished surface to be finished from the beginning of the polishing operation, the grit of the abrasive belt will become finer as it is used, and the roughness will differ from the target roughness. .

On the other hand, when polishing steel plates, etc., the characteristics of the polished surface (surface roughness, uniform beauty) are required only on one side (guaranteed surface), and the other side is a non-guaranteed surface where characteristics are not required. It is usually a surface.

Therefore, when conventionally polishing steel plates, etc., a new polishing belt with a roughness B, which is rougher than the target roughness A of the polishing surface to be polished, is first discarded and polished (dressed) on a non-guaranteed surface such as a steel plate. to obtain a fine grinding pattern of C.
This abrasive belt is stored and used for final polishing of guaranteed surfaces such as steel plates.

[Problems to be Solved by the Invention] However, in the conventional dressing method described in 1.1, since the dressing is performed using a non-guaranteed surface such as a steel plate, Hj) target roughness cannot be achieved. It takes a long time to obtain the desired quality, and since both sides (non-guaranteed side and guaranteed side) of the ψ steel plate, etc. must be polished, it is necessary to turn the steel plate over.

The efficiency of polishing work of steel plates, etc. becomes low, and the polishing work of steel plates, etc.
There are drawbacks such as decreased torsion.

The object of the present invention is to improve the efficiency of polishing work on objects to be polished such as steel plates, and to improve the speed of the objects to be polished.

[Means for Solving the Problems] The present invention provides a method for dressing an abrasive belt in a belt sanding machine comprising a contact roll around which an abrasive belt is wound, and a billy roll that brings an object to be polished into contact with the abrasive belt. In this method, the abrasive belt to be dressed is wound around a contact roll, a sheet-like coated abrasive paper having the same or coarser number as the abrasive belt marked L is held on the input side of the contact roll, and the coated abrasive paper is placed on a billie. Place it on roll 7, rotate the contact roll, and
By bringing the billy roll close to the contact roll, the abrasive belt and coated abrasive paper are rubbed together.

[Operation] According to the present invention, by rubbing the abrasive belt and the coated abrasive paper together, the coated abrasive paper of the same or coarser (smaller) count crushes the tip of the abrasive grains of the abrasive belt, and the abrasive grains of the abrasive grains are crushed by the abrasive grains of the abrasive belt. Polishing marks with a fine roughness can be efficiently applied. The polishing belt stably polishes the object to be polished over a long period of time with the target fine-grained polishing grains, and can finish polishing the object to the target roughness. In addition, KenW9In
If the grit of the paper is finer (larger) than the grit of the abrasive belt, the coated abrasive paper will be polished by the abrasive belt, which is not correct.

Further, according to the present invention, since the non-guaranteed surface of the object to be polished is not polished for dressing, it is possible to reduce the slippage of the object to be polished.

[Example] FIG. 1 is a schematic diagram showing a belt polishing machine used for carrying out the present invention.

Bell) Ken emto has a frame 11 and a contact roll 12. Tension roll 13. billy roll 14
, a contact roll 12 and a tension roll 13
An endless circular polishing bell) 15 is rotated a3 times.

Is the contact roll 12 driven? ci? The polishing belt 15 is rotated at rotation speeds 1 and 15, and its rotation gives peripheral speed to the polishing belt 15, and is made of a steel roll whose surface is coated with rubber.

The tension roll 13 rotates as the contact roll 12 rotates to apply tension to the polishing belt 15, and is made of a steel roll.

The billy roll 14 is raised and lowered by an elevating device, supports a workpiece to be polished such as a steel plate on the back, and transfers the workpiece to the polishing belt 1.
5, and is made of a steel roll.

Thus, the belt sanding machine IO supports the coated abrasive paper holding jig 16 on the frame 11, and holds the sheet-like coated abrasive paper 17 attached to the coated abrasive paper holding jig 16 on the contact roll 12.
It is designed to be held on the inlet side of the The coated abrasive paper holding jig 16 can be rotated in forward and reverse directions around its spindle, thereby making it possible to change the length of the coated abrasive paper 17 extended from the contact roll 12.

Next, a method of dressing the polishing belt 15 using the belt polishing machine 10 will be described.

- Attach the polishing belt 15 to be subjected to 1p dressing to the belt polishing [10, and wind it around the contact roll 12 and tension roll 13.

(Abrasive bell) Set the abrasive paper holding jig 16 to which a sheet-like abrasive paper 17 of the same or coarser (smaller) grit as the abrasive bell 15 is attached to the frame 11, and place the abrasive paper 17 into the contact roll 12. Hold the coated abrasive paper 1 on the side.
7 on the top side of Billy Roll 14.

(3) Turn on the drive switch of the contact roll 12,
Rotate the contact roll 12.

L4) Turn on the lift switch of the billy roll 14, bring the billy roll 14 close to the contact roll 12, and rotate the coated abrasive paper holding jig 16 forward and backward around its spindle to separate the abrasive belt 15 and the coated abrasive paper 17. Rub together. The coated abrasive paper 17 can be changed in its longitudinal position relative to the contact roll 12 by forward and reverse rotation of the coated abrasive holding jig 16, and the abrasive bell (15)
I am forced to rub it together.

Contact roll 12's drive 911 M based on the above intuition
flow value (rotational force), and polishing bell) 15 and coated polishing paper 17
The rubbing time is set to a value determined in advance through experiments for each combination of the grit of the polishing bell) 15, the grit of the coated abrasive paper 17, and the roughness of the finish to be obtained on the object to be polished. be done.

Next, the operation of the above embodiment will be explained.

1- According to the embodiment, the abrasive belt 15 and the coated abrasive paper 17
By rubbing them together, the coated abrasive paper 17 of the same or coarser (smaller) count crushes the tip of the abrasive grains of the abrasive belt 15, and the target fine roughness of the abrasive grain is formed on the abrasive belt 15. I can do it in the afternoon. The polishing belt 15 is
The object to be polished can be stably polished over a long period of time using the polishing grains having the target fine roughness, and the object to be polished can be polished to the target roughness.

Further, according to the above embodiment, since the non-guaranteed surface of the object to be polished is not polished for dressing, the yield of the object to be polished can be improved.

Table 1 shows specific implementation results of the present invention. The dressing conditions in this case are that the drive motor of the contact roll is 11
5kW, 440V, 4P, peripheral speed of polishing belt is 15
The polishing belt size was 1300 mm and the length was 3200 mm. According to this basic implementation result,
It has been found that according to the present invention, the dressing time of the polishing belt can be shortened to about 80% of that of the conventional method, and since there is no wasteful polishing work on the non-guaranteed surface of the steel plate, the efficiency of the steel plate polishing work and the reduction in the number of short stops of the steel plate can be improved.

[Effects of the Invention] As described below, according to the present invention, it is possible to improve the efficiency of the polishing work of an object to be polished such as a steel plate, and to improve the speed of polishing the object to be polished.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing a belt polishing machine used for carrying out the present invention, and FIG. 2 is a diagram showing changes in roughness of the polishing belt as it is used. 10...Belt polishing machine, 12...Contact roll. 14...Billy roll. 15... Abrasive belt, 16... Coated abrasive paper holding jig, 17... Coated abrasive paper. Agent Patent Attorney Osamu Shiokawa Figure 1

Claims (1)

[Claims] (1) A contact roll around which the abrasive belt is wound,
In a method of dressing an abrasive belt in a belt sanding machine having a billy roll that brings the object to be polished into contact with the abrasive belt, the abrasive belt to be dressed is wound around a contact roll, and the abrasive belt is wound with the same or coarser grit as the abrasive belt. A sheet of coated abrasive paper is held on the input side of the contact roll, the coated abrasive paper is placed on the billy roll, the contact roll is rotated, and the billy roll is brought close to the contact roll to separate the abrasive belt and the abrasive cloth. A method of dressing an abrasive belt in a belt abrasive machine characterized by rubbing it with paper.