SU1349887A1 - Composite cutting tool - Google Patents

Abstract

The invention relates to metal cutting and can be used when machining holes. The purpose of the invention is to expand the technological capabilities of the tool by reducing the length of the junction points and thereby placing a larger number of intermediate tool heads on the same tool length due to the execution of narcotic knots on the nodes. 7 and 10 inner conical surfaces intended to interact with each other. To ensure a guaranteed tension in this joint, the angles of taper are different, and to ensure elasticity, the thickness of the annular end h is determined from the ratio h D amp. where D is the outer diameter; K 0.25-0.35. When screwing the threaded protrusion 6 into the threaded hole 9 of another element, the cone 7 unclenches the walls of the circumferential conical surface 10 until the surfaces 8 and 11 are completely in contact, while ensuring full mating of surfaces 7 and 10, i.e. exact connection of surfaces with tension about 1 c. L-ly, 3 Il. about "e CO 4 CO 00 00 H

Description

The invention relates to metal cutting and can be used in the processing of holes.

The purpose of the invention is to expand the technological capabilities of the tool by reducing the length of the junctions and thereby placing a larger number of intermediate tool heads on the tool. IQ I Figure 1 shows the instrument, a general view; 2 is an intermediate element; FIG. 3 is a diagram of the base of mating elements.

The tool contains a mandrel 1c g with a shank 2, intermediate tool heads 3, an end tool head 4 and intermediate elements 5. The set includes simple interface nodes, cut to a height of (0.2-0.3) h , g thickness of the ring end.

When assembling a tool, insert a threaded protrusion 6 of one of the joint elements in a threaded branch 9 of another element.

When screwing a threaded hole into the hole, the conical surface comes into contact with the inner no. 10 surface. Thus, the angle ot.rj is greater than the angle с.,., The surfaces are first contacted at the 11 o ring.

With further screwing, the cone 7 unclenches the walls of the ring of the inlet cone 10, to complete contact

monthly tool heads 3 20 ring surfaces 8 and 11,

and intermediate elements 4, different in length and diameter.

Elements 1-5 are aligned axially with the help of the nodes. In this case, each intermediate tool head and each intermediate element have two conjugations 5, one of which includes a threaded protrusion b, a conical surface 7 and an annular face plane .8, and the other - a reciprocal threaded hole 9, an internal cone 10 and annular end 11 "

The mandrel 1 and the end cutter head 4 are provided with one of such nodes.

At the nodes of conjugation with the internally matched surfaces, the thickness of the annular end face is related to its intrinsic diameter

Oh 16

 h K. D. ,

where h is the thickness of the ring-end, D is the outer diameter, K ,, 0,25-0,35 - coefficient. The taper angle of the outer conical surface 7 is made larger than the taper angle of the inner conical surface 10 associated with it, by an amount determined by the ratio

., (f) -,

where is the half angle of the taper; j h is the thickness of the annular end; j D is the outer diameter; K 0,017-0,021 ° - empirical

coefficient.

When the surface of the elements adjacent to the conical, the hole 25

thirty

When the thickness of the ring is performed, the difference in the angle of conicity with the ratio of geometric meters at the moment of contact of the faces of surfaces 8 and 11 is conic 7 and 10 are conjugate along the whole generatrix, and their connection is nat.

At values of the coefficient K, the increased wall stiffness would prevent the screwing in p and would make the creation of contacts 8 and 11 difficult, and at the values of the coefficient 25, weak nat between the conical surfaces

35 would need their elongation

The choice of the coefficient K for the pre-proposed range (K „0 0.021) in one case excluded the possibility of contact throughout

0 forming a conical surface and in another would lead to joint formations without tension.

When connecting the elements of an instance, the presence on their surface

The 45th section creates a sub-key, which makes assembly easier, and the cut also creates bone edges, as a result of which the connection of the conical surfaces is strained

50 are concentrated on points of con fi ned cross sections of the highest rigidity, which improves the centering of the elements.

Similarly, they match each other.

55 tool elements. At the same time, the position of the incisors is determined by the number of tool heads and primary elements necessary and radial selection by diam.

their connecting points, cut to a height of (0.2–0.3) h, where h is the thickness of the ring end.

When assembling a tool, a threaded protrusion 6 of one of the mating elements is inserted into the threaded hole 9 of another element.

When screwing the threaded protrusion into the hole, the conical surface 7 comes into contact with the inner conical surface 10, Since the angle ot.rj is greater than the angle с.,., These surfaces first contact at the annular end 11 o

Upon further screwing the threads, the cone 7 expands the walls of the ring, covering the inner conical surface 10, until full contact

annular surfaces 8 and 11,

When the thickness of the ring and the difference in the angle of taper with the specified ratios of the geometrical parameters at the moment of contact of the end surfaces 8 and 11 are conical, the conical surfaces 7 and 10 are conjugated along the entire length of the generator, and their connection has a guaranteed impurity.

With the values of the coefficient 35, the increased stiffness of the ring wall would prevent the threads from screwing in and make contact between the fingers 8 and 11 would be difficult, and with the values of this coefficient 25 weak tension between the conical surfaces would necessitate their elongation.

The choice of the coefficient K outside the proposed range (K „0.037-0.021) in one case would exclude the possibility of contact along the entire length

generatrix of conical surfaces, and in another would lead to the formation of a joint without tension.

When connecting the elements of the instrument, the presence of gras on their surface

This area creates a turnkey surface, which makes assembly easier. Along with that, the cut creates stiffening ribs, as a result of which stresses in the joint of conical surfaces

they are concentrated on contact points corresponding to the sections of the greatest hardness, which improves the centering of the elements.

Others match in the same way.

tool elements. At the same time, the axial position of the incisors is determined by sub-instrumentation heads and intermediate elements of the required length, radial selection by diameter.

The cutting offered by the tool does not differ from the cutting process by the known multi-cutting tools for machining holes.

Invention Formula

1. Stacked cutting tool including axially coupled mandrel, transition elements and end toolhead, each of the transition elements equipped with two mating units, one of which has a threaded protrusion and the other a threaded hole, and the mandrel and end tool The head is equipped with one of such interfaces, and each of the indicated nodes is made with an annular end face for the base of mating elements, from which, in order to expand the technological possibilities second tool assemblies by reducing the length of the coupling at the latest provided with a threaded protrusion, the tapered surface is formed, and on the nodes interfacing with the threaded hole - Response s inner conical surface, the annular thickness at

connecting to the inner conical surface is related to its outer diameter by the ratio

h. .

where h is the thickness of the annular end; D is the outer diameter of the ring

butt;

K 0,25-0,35 - coefficient showing the required thickness of the ring when D 1,

and the taper angle of the outer conical surface is made j greater than the taper angle of the inner conical surface responding to it by an amount determined from the ratio

 K, (- O.

where cC is the half angle of the taperJ h is the thickness of the annular end faceJ D is the outer diameter of the annular

butt;

K 0., 017-0.021 ° is an empirical coefficient.

2. Tool pop. 1, characterized in that the transition elements are made in the form of tool heads.

J

9 10

Editor E. Papp

Compiled by SoBeh Techred L. Serdyukova

Order 5216/10

Circulation 970 Subscription

VNIKLI USSR State Committee

on inventions and discoveries 113035, Moscow, L (-35 ,, Raushsk nab ,, d. 4/5

Production and printing company, Uzhgorod, ul. Project, 4

Proofreader L. Patay

Claims (2)

Claim 1. A typesetting cutting tool including an axially conjugated mandrel, transition elements and an end tool head, each of the transition elements having two mating nodes, one of which has a threaded protrusion and the other a threaded hole, and the mandrel and end tool head are provided one of these nodes, and each of these nodes is made with an annular end for the base of the mating elements, characterized in that, in order to expand the technological capabilities of a cone surface is made by reducing the length of the mating nodes, on the latter equipped with a threaded protrusion, a conical surface is made, and on the mating nodes with a threaded hole, the reciprocal internal conical surface is made, and the thickness of the annular Topiia adjoining the internal conical surface is connected with it the outer diameter of the ratio of ⁵ h = K / D ^, where h is the thickness of the annular end; D is the outer diameter of the annular end; ₁₀ K = 0.25-0.35 is a coefficient showing the required thickness of the ring at D = 1, and the taper angle of the outer conical surface is made j larger than the taper angle of the corresponding conical I □ lower conical surface to the cycle relation, determined from x2 < D = where ct is half the taper angle; h is the thickness of the annular end; D is the outer diameter of the annular end; K = 0.017-0.021 ° - empirical 25 ratio. 2. The tool according to claim 1, characterized in that the transition elements are made in the form of tool heads.