SU743800A1 - Multithread worm-type tool - Google Patents

Description

product, and therefore degrade the quality of the treated surface.

Known multiple-worm tools with non-special coils, the profile of each coil in a normal section on both sides of the apex is curvilinear and is made as a circular arc, where Ri and Rz are the radii of irofiles but both sides of the top; D-diameter drill.

The disadvantage of this tool is that a large load is applied to the worm of the screw tool, since the groove of the drill is immediately processed on both sides. Heat flux, separation of juke; nys while simultaneously processing all the sides of the groove of the drill, adversely affects tool life and the quality of the surface to be machined.

As a consequence, the durability of a worm tool is underestimated, especially if the material is a worm abrasive.

The aim of the invention is to increase the durability of the tool being machined and the quality of the machining.

The goal is achieved by the fact that the profile of each coil in the normal section is made straight on one side of the top, curvilinear on the other and curved one to the other surface of two adjacent turns on the other.

In addition, the curvilinear profile of one turn is made corresponding to them, the parts of the groove profile of the product in the normal section, and the curvilinear profile of the adjacent coil - corresponding to them, the other part of the groove profile of the product.

FIG. 1 shows a multiple starting worm instrument, a slit; in fig. 2 - and the position of the first turn relative to the workpiece in the process; in fig. 3 - position of the coil next to the first one in the process of work relative to the workpiece.

Multiple screw-in nistrument has cutting coils of different profile in the normal section.

The profile of coil 1, on the one side of the top 2, is straight line 3, and on the other, curvilinear 4 and corresponds to part 5 of the groove profile of the product in the normal section.

The profile of the adjacent coil 6 also has a straight line section 7 on one side of the top 8 and a curved section 9 on the other side of top 8, corresponding to part 10 of the groove profile of the product.

The surfaces of two adjacent turns, facing one another, are similar - flat or convex.

The operation of the drying tool described is as follows.

It is high; 1 the grooves on a product have not been treated, and its treatment of the drainage system is successively followed. The first turn of the tool processes the curved surface of the part 5 of the groove profile of the product and forms the surface of the groove part 11 in part. Then the neighbor coil enters this

The same groove removes a part of the metal from the surface of part 11 of the profile of the grooves before forming the curviligious surface of part 10 of the profile of the product, and between the already curved surface

the part 5 and the surface of the tool portion 7 form a cavity into which the coolant is facilitated.

This embodiment of the surfaces of the turns of multiple worm tools

eliminates the formation of a cavity between the plane of the groove and one of the tool turns. During this treatment, coolant enters this cavity, improving cooling. Thus, tool life

increases, while improving the quality of the processed surface and coolant supply.

Formula and 3 optics

1. Multiple worm-hole instrument with spiral turns, which is used to increase the durability of the processed shutrumite and quality

The processing, the profile of each hole in the normal section with one side from the top is filled with a linear line, on the other, the curve is linear, and the surfaces of two adjacent turns, similar to one another, are similar.

2. Tool no. 1, the fact that the curvilinear profile of one coil is made corresponding to them, part of the groove profile of the product in a normal section, and the curvilinear profile of the next coil - corresponding to it, another part of the profile of the product.

Sources of information taken into account at the examination

1. The UK patent N ° 1271902, cl. In 23K, publ. 1970.

2. USSR author's certificate number 195841, cl. In 23F 21/10, 1966.

3. N. I. Fedotov, V. A. Samsonov and B. D. Danilenko. Forking twist drills with higher accuracy. Advanced Technological and Industrial Experience, No. 7-68-1143 / 267, GOSINTI, Moscow, 1968,

FIG. one.

IPUi.Z

(rig. 3

Claims (3)

Claim 1. A multi-worm worm tool with spiral turns, which requires that, in order to increase the tool life and processing quality, the profile of each turn in a normal section is made straightforward on one side of the apex, curved on the other and one turned to the other surface of two adjacent turns are similar. 2. The tool on π. 1, which includes the fact that the curved profile of one turn is made corresponding to the part of the groove profile of the product in a normal section, and the curved profile of the adjacent turn is corresponding to the other part of the groove profile of the product. The source and to and the information taken into account during the examination 1. UK patent No. 1271902, CL In 23K, publ. 1970. 2. Copyright certificate of the USSR No. 195841, cl. In 23F 21/10, 1966. 3. N. I. Fedotov, V. A. Samsonov and B. D. Danilenko. Production of twist drills of increased accuracy. Advanced scientific and technical and production experience, No. 7-68-1143 / 267, GOSINTI, Moscow, 1968, FIG. 1. Morozova ^Comp Avitel jj " W L. ^ ^AME etsk _th 52RR Ktorov ^e _s ^te p DRktor ΗΠ0 \ η ^{, ο / Ι2} ^ ^ОИСК »p _{0 (} Subscription at & L, ’^ R ^ of Discoveries