SU1514497A1 - Made-up boring tool - Google Patents

Description

The invention relates to metal cutting and can be used for boring precision holes. The aim of the invention is the expansion of technological capabilities by providing fine adjustment of the cutting insert. The tool consists of body 1, glass

4 with a conical 6 and threaded 5 sections and longitudinal slots 7.

A cutting insert 8 and an insert 9 are located in the cavity of the cup 4, contacting along longitudinal flat sections 10 and 11. The cup and the insert form a threaded joint 14. On the side of the threaded portion of the glass, a hole 15 of triangular conical shape under the adjustment key is made.

The cutting insert is clamped and unfastened in the tool body by rotating the differential nut 16. Micrometric adjustment of the cutting insert to size is carried out by rotating the cup with an adjusting key. Making a thread in the hole of the glass on the side of its bottom and in the inset allows you to create minimal friction in mating the inner cylindrical surface of the glass with the insert and the cutting insert. The design provides for the fastening of the cutting insert in the axial and radial directions due to the tightness in the mating rezhushey insert, glass and body.

8 or „

2

5TS „1514497 A1

four

1514497

The invention relates to the processing

metal cutting and can be used for boring precision holes.

The purpose of the invention is the expansion of technological capabilities by providing fine adjustment of the cutting insert.

FIG. 1 shows a boring assembly tool; in fig. 2 is a section Ι0 Λ-Λ in FIG. one; in fig. 3 is a section BB in FIG. one; FIG. 4 is a view B of FIG. 2; in fig. 5 is a view of FIG. 2; in fig. 6 - key for adjusting the overhang of the cutting insert; 7 - 15

view L in FIG. 6; in FIG. 8 is a view E of FIG. 6

The tool consists of a housing 1 in which a hole is made, consisting of a threaded 2 and a conic 20 plots. A cup 4 is installed in the opening of the housing, at one end of which an external thread 5 is cut and the second end 6 is tapered with longitudinal slots 7. In the cavity 25 of the cup 4 there is a cutting insert 8 and an insert 9, which are in contact along longitudinal flat sections 10 and 11.

The liner 12 is made on the liner, and groove 13 under this ledge is made in the case. 30 To prevent the insert from falling out when changing the cutting insert, the protrusion of the insert, orienting the position of the insert in the housing, is made expanding from the segment portion. On the right side of the hole in the glass, on the side of its bottom, there is a thread 14 mating with the external thread of the insert 8. On the side of the threaded part of the glass, there is a hole of a triangular 40 shape 15 with an angle at the apex, for example, 60. A differential nut 16 having an internal 17 and an external 18 thread is connected to the hole in the housing and connected to the glass 4 45

internal, and with case 1 external threads. The nut has a hole 19, the diameter of which can be, for example, 1-1.3 s1 ₄ , where b, is the diameter of the circle described around the three-edged opening of the glass. The working part of the micro-adjustment key 20 has the cross-sectional shape of an isosceles triangle with an apex angle smaller than the corresponding angle of the turnkey angle $$, for example, 55-58 °. The opposite side is made concave. On the stem of the key 20, for example, using an elastic ring in the annular

undercut, by friction forces fixed limb

21 readings of the cutting insert. The countdown is relatively

reference lines on the tool body.

The cutting insert is clamped and unfastened in the tool body by rotating the differential nut 16. When the nut is screwed on, the cup 4 due to the difference in the pitch of the external and internal threads moves in the hole until it touches its cone. With further tightening of the nut, the cutting insert is clamped with an insert in the tool body. When unscrewing the nut 16, the conical part of the glass fastens the insert with the liner.

Micrometric adjustment of the cutting insert for size is carried out by rotating the glass with an adjusting key with a reading dial. The reference is made relative to the reference line on the tool body.

The design ensures the fixing of the cutting insert both in the axial and radial directions due to the tightness in the mating of the cutting insert and the glass.

Performing the threads in the hole of the glass from the side of its bottom and in the insert from the side opposite to the cutting part allows to create optimal conditions for the functioning of the unit, since it creates minimal friction in conjunction of the inner cylindrical surface of the glass with the cylindrical surfaces of the liner and cutting insert. The micro adjustment key is made with a cone, which reduces the cross-sectional area to the buck. Such a design of the micro-adjustment docking station allows eliminating backlash and improving the accuracy of the instrument settings for a given size.

Claims (1)

Claim Boring tool assembly, comprising a housing, a tumbler with a threaded section and a longitudinally-split cone with a longitudinal cut, liner and cutting insert, distinguished by the fact that, in order to expand technological capabilities by providing fine adjustment, on the inner surface of the tumbler from the side conical section is made 6 1514497 the thread, and from the side of the threaded section, a turnkey shaped hole, on the cutting insert, on the side opposite to the cutting element, there is a threaded section designed to interact with the thread while the tool is equipped with a transitional differential nut with external and internal threads, designed to interact respectively with the thread of the housing and the threaded section of the glass. 6-6 fir. 9 FIG. five P> IDD 21 N1 Phie. 7