SU1172706A1 - Flat chisel - Google Patents

Abstract

A flat chisel containing a flat cutter with a one-sided bevel forming the cutting edge and a handle positioned so that its longitudinal axis forms an angle not equal to 90 with the cutting edge, so as to improve the quality of cutting and expansion the area of use, the handle is provided with two supporting protrusions, with one jaw protrusion having a surface inclined in a circular pattern at an angle of 20-25 relative to the plane passing the first. The acute angle between the longitudinal axis of the handle and the cutting edge is 70-75 °, while the other protrusion has a rounded surface at the interface with the handle. Crt with; -h | about od

Description

The image1) ethene refers to the processing of wood and other nonmetallic materials; and the maket will be used in the model, table and educational production, as well as in the national economy, for example for processing products and products, not suitable for processing with a conventional knife.

The purpose of the invention is to improve the quality of cutting and expand the field of application.

H FIG. 1 shows a chisel, general view; in fig. 2 is a view A of FIG. 1j in FIG. 3 - flat cutter. chisels.

The flat chisel contains a flat cutter 1 with a one-sided bevel 2 forming the cutting edge 3 and the handle 4 positioned so that its longitudinal axis 5 is with the cutting edge 3 an acute angle i 70-75, the handle is provided with supporting lugs 6 and 7 . & 1 spade 6. the surface 8, the pitch inclination p towards the bevel at an angle of f- 20-25, is spread in the plane of the perpendicular cutting edge 3, relative to the plane passing perpendicular to the plane of the cutter part 1. The protrusion 7 has a rounded surface 9 in the place of its conjugation 4. In the upper part of the flat cutter 1, there are, for example, through holes 10 for secure fastening of the handle 4

to cutter 1 when molding it and: s plastics ii. The width of a flat cutter 1 for convenient operation when cutting curved surfaces with radii up to 200 mm is about 100 mm.

The work of the chisel is as follows.

On the working surface located not lower than 150 mm from the level of the elbow, the object being handled is held with the left hand, and the right hand is cut from top to bottom and away from the chest level along the level of the elbow. The protrusions 6 and 7 in the lower part of the handle 4 increase the cutting force, and the inclined surface 8, angled H and the rounded surface 9 exclude the formation of calluses on the hand due to the tight fit of the end part of the working hand and its lower finger. 8 and 9. At the angle of inclination of the axis of the handle 4 of the chisel at an acute angle of D 70-75 ° to the cutting edge 3, the quality of the treatment surface is ensured due to the presence of sliding along the cutting edge. The possibility of increasing the force of the pressure and the formation of a slip along the cutting edge allow the use of a chisel instead of an ax and knife when cutting difficult-to-work products and articles.

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Claims (1)

.A flat chisel containing a flat cutter with a one-sided bevel forming a cutting edge, and a handle located so that its longitudinal axis is with the cutting '.4 edge angle not equal to 90 ^e, t Leach in that, in order to improve cutting quality and expansion oblasti'primeneniya, the handle is provided with two support arms, wherein one / protrusion has a surface inclined vstoro * Well bevel angle 20 -25 ° relative to a plane extending perpendicular to the flat part of the cutter, and the acute angle between the longitudinal axis of the handle and the cutting edge is 70-75 °, while the other protrusion has a rounded surface at the interface with the handle.