JPH0555248B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Object of the invention (industrial application field) The present invention is a method for forming a built-up cutting edge of a saw for processing metal. Specifically, the present invention relates to a method of rapidly forming a built-up cutting edge by appropriately abrading the cutting edge of a sawtooth using a rotating grinding brush.

(Conventional technology) When a saw for metal processing is cut by sharply polishing the cutting edge of the saw blade, the cutting edge digs into the hard material too much, causing the blade to chip. This will cause the blade to chip and cause a complete loss of sawing ability, so perform a break-in operation in which the material is lightly pressed against the polished cutting edge to crush the cutting edge to the extent that it does not dig into the material. When this is done, the blade does not chip, and the powder of the cutting material is welded to the crushed edge part, forming a so-called built-up edge, which improves the blade life of the saw.

(Problems to be Solved by the Invention) However, when the cutting edge of the saw tooth is crushed to form a built-up cutting edge by the breaking-in operation as described above, the degree of crushing of the tooth varies greatly depending on the type of material.
For hard materials such as 50C, 45C, and stainless steel,
The blade collapses and a built-up edge is formed in a relatively short period of time, but with soft materials such as SS41 and SS materials, a built-up edge is not formed even after half a day of break-in operation.

The present invention was made in order to solve the above-mentioned conventional problems, and an object of the present invention is to provide a method in which a rotating polishing brush is applied to the cutting edge of a sawtooth, and a built-up cutting edge is formed immediately after use.

B. Structure of the Invention (Means for Solving the Problems) The method for forming a structural cutting edge of a saw according to the present invention is to attach a rotary grinding brush B formed of a synthetic resin filament 3 mixed with abrasive grains B to a saw blade 1. The above-mentioned conventional problems are solved by applying the saw teeth 2 formed at predetermined intervals from the back, slightly crushing the cutting edge A, and quickly forming the structured cutting edge C by adhering the cutting material powder to this part. This is to solve the problem.

(Function) When forming a built-up cutting edge on a sawtooth using the method of the present invention described above, the rotary polishing brush B is placed at a position where the tip of the polishing line 3 grinds the cutting edge A of the sawtooth 2, and the drive shaft 5 The saw 1 is rotated in the direction of the arrow in FIG.
When the saw tooth 2 is fed in the direction of the arrow, the cutting edge A of the saw tooth 2 is ground by the rotating polishing brush B from the tooth back side to the cutting edge A, so that the cutting edge A of the saw tooth 2 is ground as shown in Fig. 3. When the saw 1 goes around, all the saw teeth 2 are crushed one after another to prevent them from biting into the
The cutting edge A of the saw is crushed, so if you finish the blade crushing operation at this time, set the saw 1 on the saw machine (not shown) and start sawing the material, the saw blade 2 will cut the material without biting into it. The powder of the cutting material generated during cutting is adhered to the cutting edge to form a structured cutting edge C which is hard and has excellent durability.

(Example) Next, an example of implementing the method related to the present invention will be described based on the drawings.

In Figure 1 of the drawing, A is a saw such as a band saw or a circular saw.
A large number of saw teeth 2 are formed at predetermined intervals on the edge of the saw blade 1, and when the saw teeth 2 are sawn with the cutting edge A sharply polished, the cutting edge A will dig into the material too much, causing the blade to become damaged. To avoid chipping, a rotary polishing brush B formed by attaching polishing filaments 3 formed by mixing synthetic resin a and abrasive grains b in an annular shape around a core body 4 is attached to the drive shaft 5 as shown in FIG. When the saw A is rotated in the direction shown in Fig. 1 and positioned so that the cutting edge A is polished by the abrasive line 3 described above, the saw A is advanced in the direction shown by the arrow in Fig. 1. ,
The cutting edge A of the sawtooth 2 is ground from the tooth back side to the cutting edge A side, and as shown in the enlarged view in Figure 3, the cutting edge A is crushed to prevent it from digging into the material during cutting. Therefore, when sawing material using this saw 1, chipping of the cutting edge A due to biting does not occur, and the cutting powder of the material is immediately welded to the cutting edge A, forming a structured cutting edge C as shown in Fig. 3. A sawn timber with excellent performance and durability was created.

C. Effects of the Invention Since the method according to the present invention uses a rotating polishing brush to grind the cutting edge of the sawtooth, even in the case of a long band saw, the cutting edge of the sawtooth can be crushed within a few minutes, and the built-up cutting edge can be removed as soon as it is used. This eliminates the need for a break-in operation, making it possible to significantly improve work efficiency.

By simply adjusting the tooth crushing time according to the number of saw teeth, anyone can easily perform appropriate tooth crushing on any saw, and the tooth crushing state can be delicately adjusted by increasing or decreasing the time.

It has the following unique effects.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an example of implementing the method according to the present invention. FIG. 2 is an enlarged cross-sectional view of polishing filaments constituting the rotating polishing brush used in the above. FIG. 3 is an enlarged side view of a constructed cutting edge formed in a portion where the cutting edge is crushed by the same method as above. In the figure, A is a saw, 2 is a saw tooth, A is a cutting edge, B is a tooth back, and C is a constructed cutting edge.

Claims (1)

[Claims] 1. A rotary grinding brush made of a synthetic resin wire mixed with abrasive grains is hung from the back of the saw teeth formed at predetermined intervals on the saw blade to slightly wear the cutting edge, and the worn parts are coated with cutting material. A method for forming a built-up cutting edge of a saw characterized by rapidly forming a built-up cutting edge.