SU466078A1 - Device for guiding and pressing band saw blade - Google Patents

Description

one

This invention relates to metalworking, in particular to saw blade designs.

Devices are known for guiding and pressing the band saw blade to the workpiece being cut by means of spherical fingers that are included in endless grooves of identical shape, made in the middle part of the blade on both its sides.

However, the production of a double-sided groove in the saw blade is associated with certain difficulties, which makes the blade more expensive. Due to the small thickness of the web (usually 0.8-1 mm), the depth of the grooves can be no more than 0.2-0.3 mm, which can lead to a see of the edges of the groove under the action of the vertical component of the cutting force. The weakening of the cross section of the saw blade grooves can lead to its destruction from the friction of the finger against the wall of the groove during operation.

In order to ensure reliable clamping of the working section of the saw with cutting teeth on both edges of the blade to the workpiece being cut, the pressure rollers of the device proposed are made in the form of non-driving pin gears that engage with the teeth on the non-working edge of the blade cutting part.

To increase the cutting accuracy and increase the durability of the pinwheels, each guide-hold block contains at least two pinwheels connected by a parasitic gear.

FIG. 1 shows the proposed device, a general view; in fig. 2 is a section along A-A in FIG. one; in fig. 3 and 4 are variants of engagement of the lantern wheels with the saw.

The device consists of guide-clamping blocks 1 located along both

to the sides of the workpiece being cut 2. Each block 1 consists of a body 3 installed in machine brackets (not shown) and guide elements 4 for a working branch of a belt blade 5. In the upper part of the body 3, an axle wheel 7 is fixed on the axis 6 and interacts with the teeth belt web 5. Each guide-presser unit 1 may have two pinwheels 7 connected by parasitic gear 8.

In the course of the movement, the band saw 5 is hooked by the cutting teeth 9 of the non-working edge with the tsikki 10 of the zip wheel 7, causing the latter to run around the interdental depressions of the web and press it to the workpiece being cut 2. to an increase in blade movement, resulting in reduced cutting accuracy and

durability of pinwheel girls.

In this case, a guide block 1 of two pinwheels 7 interconnected by a parasitic gear 8 is used. Clamping the saw to the workpiece at two points reduces the reaction force on each pinhole, reduces the amount of blend, and therefore increases the cutting accuracy and increases durability of tsevochny wheels.

Subject invention

Claims (2)

1. A device for guiding and pressing the band saw blade, which consists of two blocks, each of which carries guide elements in contact with the side surface of the blade and clamping rollers, characterized in that, in order to provide a reliable clamp to the cut the work piece of the band saw with cutting teeth and on both edges of the blade; the pressure rollers are made in the form of pinwheels which engage with the teeth of the non-working edge of the blade of saw blades. 2. The device according to claim 1, characterized in that, in order to increase the cutting accuracy and increase the durability of the pinwheels, each unit contains at least two pinwheels interconnected by parasitic bristles. Fig