SU1335386A1 - Arrangement for securing the point tool - Google Patents

Abstract

The invention relates to the field of mechanical engineering and can be used on computer-controlled machine tools. The aim of the invention is to expand the technological capabilities by automatically adjusting the overhang of the end cutting tool relative to the floating base of the machined part or tool. The device comprises a tool holder 1 with an axial hole under the tool shank and a spring 4 installed and this hole, describing the hole opening on the end face and in contact with the tool shank. In the transverse hole of the mandrel, a locking axis 5 is installed with a bevel designed to interact with the flat on the tool shank. At one end, the locking axis is spring-loaded with a packet of 6 cup springs, and at the other end of the axis a cavity is provided for supplying hydraulic pressure. When the clamp is loosened by means of hydraulics, the spindle 10 with the tool moves up to the stop of the tool into the floating base of the workpiece. In this case, the spring 4 is compressed until a guaranteed contact is made, the tool with the base and the tool is clamped by means of a package of 6 disk springs. This ensures that the instrument is automatically adjusted from the floating base on its departure. 3 il. "(L 00 00 SP 00 00 Oi

Description

The invention relates to mechanical engineering and can be used on machine tools with programmed control (PU).

The aim of the invention is to expand the technological capabilities by automatically adjusting the overhang of the end cutting tool relative to the floating base of the fixture or workpiece.

FIG. 1 shows the proposed device with an A-tool set up on the departure and clamped in the spindle nest; in fig. 2 is a section A-A in FIG. one; in fig. 3 - setup diagram of the end cutting tool - on the flight A.

The device consists of a tool mandrel 1, having channels 2 for supplying oil to the cavity 3, the spring 4, the locking axis 5, the package of disk springs 6, the cup 7, the cover 8, the check valve 9.

The device is mounted in the shaft of a spindle 10 having a channel 11 for supplying liquid to the device. The leakage of fluid from the hydraulic system is prevented by seals 12-14. The beaker and the lid are fastened with screws 15 and 16. The locking axis 5 has a bevel 17 that acts on the tool 18 through a corresponding hole 19, made on its tail. The required clamping force of the tool is provided by the selection of the ring 20. The spontaneous falling out of the cutting tool when not pressed, is provided with a screw stop 21, limiting the stroke of the locking axis 5. When setting the offset, the cutting tool is brought all the way to the floating base 22 of the part (or fixture) 23 installed on Desk 24 of the machine with PU (Fig, 3).

FIG. 3 shows Z — distance from the spindle nose to the plane of the table in the initial position (O of the machine along the Z axis); And - the size along the spindle axis, configured from the floating base 22 to the spindle nose (tool overhang); 2 - the amount of spindle movement with the tool after reaching the tool overhang setting; K is the amount of compression of the spring 4 while ensuring guaranteed contact of the cutting tip of the tool with the floating measuring base; 2D - distance from the swim

0

0

five

five

0

five

the base to the cutting tip of the fixed tool in the initial position of the spindle (O machine), while Zj, Z.

The device {works as follows.

Before machining the part after the tool change, the spindle is in the initial position (Fig. 3a). Under the influence of pressure in the hydraulic system, the locking axis 5 (Fig. 1) is displaced to the left until the screw stop 21 compresses the disc spring 6, while the cutting tool 1.8 is in the free state. Then, using the control program (UE), the spindle 10 with the tool moves up to the stop into the floating base 22 of the part (or device) 23, compressing the spring 4 by the amount K to create a guaranteed contact of the cutting tip of the tool with the floating base of the part (or device) after which, according to the UE, the tool clamping command is executed, according to which the pressure in the hydraulic system is relieved through the reverse valve 9, and under the influence of the disc spring 6, the axis 5 is displaced to the right, securing the cutting tool (Fig. 1). In this position, the instrument automatically adjusts from the floating base on its departure. Then the spindle on the control unit moves to the initial position (O) or to the cutting zone for machining the part.

The ability to automatically adjust the instrument's departure from the floating base allows expanding the technological capabilities of the machine with a PC, reducing the number of operations (installation of the BOP parts required for relocation), transfer a number of operations previously performed using the test passes method on universal machines, and with PC ...

For rmula izobre-shadow

A device for fastening an end cutting tool, comprising a tool holder with a tapered shank intended for autochatising a clamp in the machine spindle, and a slot under the tool shank, locking the axis with a bevel for interacting with the tab on the tool shank, and a spring-hydraulic mechanism for moving the axis when clamping and spinning the tool shank, which is distinguished by the fact that, in order to expand technological capabilities by automatically adjusting the reach to hench cutting tools relative to the floating base of the workpiece ,. the socket under the tool shank is made in the form of an aperture, the axis of which coincides with the axis of the mandrel, while in the nest there is a spring for contact with the end surface made in the - hole and with the end of the shank

the strut, the locking axis is installed in a transverse bore made in the mandrel, and the spring-hydraulic mechanism is made in the form of a cup fixed on the mandrel with a locking axis installed between the cup and the end of the locking axis of the package of Belleville springs, the cavity for supplying hydraulic pressure formed from the opposite end of the locking axis, and channels made in the spindle and mandrel for supplying hydraulic pressure to said cavity.

17

FIG. 2

Claims (1)

Claim A device for attaching an end cutting tool, comprising a tool holder with a tapered shank intended for automated clamping in the machine spindle and a socket for a tool shank, a locking axis with a bevel designed to interact with the flat on the tool shank, and a spring-hydraulic fur 1335386 axis when clamping and spinning the tool shank, characterized in that, in order to expand technological capabilities due to automatic adjustment of the offset ontsevogo cutting tool with respect to the floating base of the workpiece ,. the socket for the tool shank is made in the form of an opening, the axis of which coincides with the axis of the mandrel, while a spring is installed in the socket for contact with the end surface made in the hole and with the end of the tool shank, the locking axis being installed in the transverse hole made in the mandrel, and the spring-hydraulic mechanism is made in the form of a cup mounted on a mandrel coaxially with a locking axis, mounted between the cup and the end of the locking axis of the disk spring package, the cavity for supplying hydraulic pressure, formed from the opposite end of the locking axis, and are made in the spindle and the mandrel of the channels intended for supplying hydraulic pressure to the said cavity. A ~ A FIG. 2 Fig.Z Compiled by A. Sapenok Editor I. Shulla Tehred M.Dvdyk Proofreader M. Demchik Order 4004/13 Circulation 974 Subscription VNIIIPI of the USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushskaya embankment, d. 4/5 Production and printing company, Uzhhorod, st. Project, 4