SU1227437A1 - Drift pin - Google Patents

Description

The invention relates to a device for machining holes and can be used in engineering, machine-tool and other areas where holes are machined without removing a layer of material.

The purpose of the invention is to simplify the operation of the flooring due to the independent movement of the mandrel in the hole being machined,

The drawing shows a mandrel, general view.

The mandrel contains smoothing elements 1, a housing consisting of two parts 2 and 3, each of which contains rigid and elastic sections. The axial direction of the pipe is represented by hollow chambers filled with hydraulic fluid 4, which is acted upon by plungers Z. Concentric electromagnet 6 is mounted to each plunger 5. Spring 7 presses the electromagnet 8 bore until it contacts the plunger 5. Hermetically closes the cavity Cup 10, in which the drive is placed, Stoppers 11 are used to fill the chambers with hydroplastic 4.

Giving voltage to the windings of electromagnets 6 with a certain pulse frequency, excite axial oscillations of the plungers 5,. As a result of the phase shift of the voltages, the vibrations of the plungers 5 are displaced so that they compress the hydroplastic 4 in their chambers sequentially. Starting from the camera, located on the side of the workpiece, in which it is necessary to edit the M, Kelemesh Order 2249/16

Compiled by V. Kuznetsov

Tehred G, Gerber Proofreader I. Musk

Circulation 740 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk: 4/5 nab.

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

put a hole. Moving the plunger 5 into the chamber causes an elongation of the mandrel in the axial direction, as a result of which it advances in the bore-. ting. As a result of the asymmetrical deceleration of the smoothing elements 1, the force that is necessary to move the mandrel in the direction opposite to the workpiece is greater than the force required

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to move the mandrel inside the hole of the workpiece, since the angle of the intake cone is smaller and the angle of the inverse cone is larger than the angle of friction.

Under such conditions, the friction force becomes a moving force to move the mandrel. Therefore, the first ring, which is advanced by an amount equal to the amplitude of its oscillations, is prevented from returning to its original position. With a subsequent decrease in the length of the mandrel, the second and third rings advance for the same reason, and the extension of the mandrel from the plunger 5 also contributes to this advancement. acting on the chamber with; hydroplast 4, located on the opposite side of the mandrel.

For the initial advancement of the mandrel by the amount of its length, a force is applied to it from any device having a hydraulic or pneumatic cylinder. After the initial force is applied, the mandrel begins to move independently and can process openings of considerable length.

The use of the proposed mandrel greatly simplifies the operation of the mandrel by eliminating the use of presses or vibromachines.

Claims (1)

DORN, comprising a housing with smoothing elements and chambers with a hydroplast in contact with the plungers, characterized in that, in order to reduce the cost of the burning operation due to independent movement of the mandrel in the hole to be machined, the mandrel is equipped with an internal drive in the form of electromagnets connected by ς plungers, this body is made of alternating in the axial direction of the rigid and elastic sections, and cameras with hydroplast are located in the zones of the elastic sections of the body, and the smoothing elements are made with en- sharpening and fixed to the rigid portion. Q Yu!> I ί