SU1379015A1 - Arrangement for vibratory drilling of holes - Google Patents

Abstract

The invention relates to metal cutting and can be used in the implementation of deep holes of small diameters. The purpose of the / J-J of the invention is to increase productivity by reducing the number of inputs and outputs of the drill. The spindle 1 is connected to the source of oscillations with the rod 23 of the axial force control mechanism through a one-sided hydraulic damper 28, made in the form of two cylinders with two rods 29 and 30. The right cavities of the cylinders are interconnected by a check valve 31 and an adjustable throttle 32. The rod 29 is rigidly connected to the oscillation source housing 19, and the rod 30 is also rigidly connected to the rod 23, on which the calibrated spring 24 and the nut-stop 25 are mounted, which simultaneously serves as a stop for the contact sensor 26. 1 sludge. i (L C 37

Description

The invention relates to the machining of metals by cutting and can be accomplished by making deep holes of small diameters.

The purpose of the invention is to increase the productivity of the device by reducing the number of inputs and outputs of the drill.

The drawing shows a device for vibration drilling holes

The device contains a spindle assembly including a spindle 1 mounted on rolling bearings 2 and 3, which are adjusted and tightened by a sleeve 4, a spring 5 and a cover 6, Spindle 1 with bearings 2 and 3 is installed in quill 7, having a possibility of longitudinal movement. The quill through the bearings 8 slip placed in the hole of the housing 9, which is rigidly fixed to the slide 10, the rotation of the spindle 1 carried out with rc driven pulley 11, belt 12, the driving pulley 13 and the motor 14,

The spindle 1 is in contact with a source of oscillations, which includes placed on the spindle 1 cam 15, in contact with the last roller 16, bearings 17 and a rigidly fixed shaft 18,

All of these elements are assembled in housing 19, which is mounted on guides (not shown) made on rails 10. Constant contact between cam 15 and roller 16 is provided with an extension spring 20, which is connected to chassis 9 and the other end eyelet 21 with quill 7,

The device contains an axial force control mechanism, made in the form of a rod 23 mounted on the bracket 22 with the possibility of longitudinal movement, on the threaded end of which a calibration spring 24 is installed. The tension force of the garnet spring 24 is adjusted by a nut 25 serving simultaneously as a stop for the contact sensor 26 , Nut

27 contour nut stop 25, the source of oscillation is connected to the rod 23 through a single-sided hydraulic rod 28, made in the form of two cylinders with two rods 29 and 30. Only the right cavities of the hydraulic damper cylinders 28 are filled with oil, the right cavities of the hydraulic damper cylinders

28 are connected to each other by a check valve

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31 and an adjustable throttle 32, One rod 29 of a hydraulic damper 28 is rigidly fixed to the housing 19 of the axial vibration excitation mechanism, and the other current 30 to a rod 23, The entire hydraulic damper 28 is mounted and fixed on the bracket 22,

A hydraulic cylinder 33 is provided in the device to bring the hydraulic damper 28 back to its initial position, which is mounted coaxially with the hydraulic damper 28 rod 30. Since the hydraulic cylinder 33 shaft 34 is rigidly fixed to the housing 9, the interaction between the hydraulic damper rod 30 and the hydraulic cylinder 33 is dry through the hydraulic cylinder body.

The tool is supplied during deep drilling of the holes by a longitudinal movement of the slide 10 by means of a nut 35, a spindle 36 n by an electric motor 37,

The device works as follows.

At the same time, the electric motors 37 and 14 are turned on. The rotation of the electric motor 37 is transmitted to the drive screw 36, which rotates, through the nut 35, mixes the slide 10 in the longitudinal direction, and this is the working feed of the drilling. The rotation of the electric motor 14 through the drive rod 13, the belt 12 and the driven screw 11 are transmitted to the spindle 1. When the spindle 1 rotates, the cam 15 also rotates. Since the springs 20 through the PINLE 7, the spindle 1 provides a constant contact between the cam 15 and the roller 16, as a result, the entire spindle assembly starts ingly in the axial direction. The spring 20 is selected in such a way that the force of its tension is significantly less than the tension force of the spring 24. In this case, the alternating forces resulting from vibration are not transmitted, but they are extinguished. hydrodamper 28,

Claims (1)

When drilling holes, an axial force arises, which through spindle 1, cam 15, roller 16, bearings 17, shaft 18, body 19 is transmitted to hydraulic damper rod 29 28. Under the action of this axial force, rod 29 moves to the right, oil from the cavity of the lower hydraulic damper cylinder 28 through the check valve 31 is poured into the right cavity of the upper cylinder of the hydraulic damper 28 and causes the rod 30 to move to the left. The latter, moving to the left, entails the rod 23, deforms the spring 24, and brings the stop 25 closer to the tip of the sensor 26, the spring 24 is configured m a way that when an axial cutting forces with a magnitude sufficient to breakage of the drill, the stop 25 presses the tip of the sensor 26. As the sensor signal is automatically input vtod and drills, and this is vtoln at high speeds the slide 10 by Electroavtomat the apparatus. At each drill output from the hole, the hydraulic damper 28 rods also automatically return to their original position. At a signal from the sensor 26, the pressurized oil is supplied to the right cavity of the cylinder 33, the body, the cylinder is moved to the right, presses the rod 30 and returns it to its original position. When the rod 30 is returned to its original position, a command is given to enter the drill, at the same time the cylinder 33 returns to its original position by supplying oil to the left cavity of the cylinder 33. After the hole in the header has been processed to the full depth, a fast return signal is given. skid 10 in the initial position and turn off the engines 37 and 14, i the formula of the invention A device for vibratory drilling of apertures, comprising a spindle located in a housing associated with a source of oscillations, characterized in that, in order to improve performance, it is equipped with an axial force control mechanism, made in the form of a rigidly connected bracket mounted in the bracket with the ability to move a spring-loaded rod with a threaded end placed on the last nut mounted on the sensor bracket designed to interact with the nut and one-sided hydraulic damper with two rods, one of which is designed to interact with a source of vibrations, and the other - with the rod.