RU128535U1 - VIBRATION DRILLING DEVICE - Google Patents

Abstract

A device for vibrational drilling, comprising a spindle shaft with a tool, elastic holders and an electrodynamic vibration exciter providing axial reciprocating movement with a given force, and a housing equipped with means for fixing the device on drilling and milling machines with a vertical arrangement of the spindle shaft, characterized in that the spindle shaft with the tool is located coaxially with the spindle shaft of the machine and is equipped with a planetary gear type, and the electrodynamic vibration exciter l is made in the form of inductors.

Description

The utility model relates to the processing of metals by cutting, and in particular, to devices for metal-cutting machines belonging to a boring-boring and milling group with a vertical spindle arrangement for increasing productivity and improving the quality of hole formation.

The device for vibration drilling consists of a housing, inside of which a spindle shaft, elastic holders and an electrodynamic vibration exciter are installed. Electrodynamic vibration exciter may consist of inductors and core. The housing can be equipped with various means of fixing the device on the machines of the above groups.

Closest to the claimed solution is a vibro-drilling device (patent No. 2386520 C1). This device contains, installed inside the housing, the shaft-spindle, elastic holders and electrodynamic vibration exciter, providing vertical reciprocating movement of the tool.

The disadvantages of this device include the following:

- the vibro-drilling device does not allow for more accurate processing due to deviation of the axis of the spindle shaft with the tool from the axis of the spindle shaft of the machine.

- the design of the device does not allow to process large-sized products without reinstallation, which is due to the limited area of the workpiece on the machine table;

- if the machine does not have reverse spindle rotation, use only a certain type of “left” drill.

The task, the solution of which the claimed solution is directed, is:

- improving the accuracy of processing, by eliminating the phenomenon of deviation of the axis of the shaft-spindle of the device with the tool from the axis of the shaft-spindle of the machine;

- expansion of the area for placing the workpiece on the machine table, which will allow you to process large-sized products without reinstalling;

- the ability to use drills of the standard type "right", in the absence of the machine reverse spindle rotation.

To solve this problem, a device for vibrational drilling is proposed comprising a spindle shaft with a tool, elastic holders and an electrodynamic vibration exciter providing axial reciprocating movement with a given force, the device housing for vibrational drilling is equipped with means for fixing the device on drilling and milling machines with a vertical arrangement spindle, characterized in that the spindle shaft with the tool is aligned with the spindle shaft of the machine and the spindle shaft with tool ments is a planetary gear type and includes an electrodynamic exciter coils.

This embodiment of the device due to the coaxial arrangement of the machine spindle and the device spindle shaft will expand the range of workpieces, provide greater rigidity of mounting the device on the machine and increase the accuracy of processing. The use of a planetary gear mechanism will allow the use of standard-type drills “right”, in the absence of a reverse spindle rotation on the machine.

Figure 1 shows a device for vibrational drilling in section. It contains a housing 1, inside which a spindle shaft 2, elastic holders 3, an electrodynamic vibration exciter, which consists of two inductors 4, 5 are installed. The electrodynamic vibration exciter 4, 5 has a kinematic connection with the spindle shaft 2 through. angular contact bearing 6. The shaft spindle 2 is connected to the machine spindle via a planetary gear type 7. To give additional rigidity to the vibration drilling device during processing and the possibility of uniform rotation, angular contact bearings 8 are placed on the spindle shaft 2, placed in case 9, 10. Moving in the axial direction is carried out by bronze bushings 11, 12.

The proposed device operates as follows. The rotational movement to the spindle shaft 2 with the tool is transmitted from the machine spindle by means of a planetary gear type 7. The additional vertical reciprocating axial movement, with a given force and amplitude, to the spindle shaft 2 with the tool is transmitted under the influence of the electrodynamic vibration exciter 4, 5 The elastic holders 3 bend and after the termination of the force from the electrodynamic vibration exciter 4, 5, return the spindle shaft 2 with the tool to its original position s.

Claims (1)

A device for vibrational drilling, comprising a spindle shaft with a tool, elastic holders and an electrodynamic vibration exciter providing axial reciprocating movement with a given force, and a housing equipped with means for fixing the device on drilling and milling machines with a vertical arrangement of the spindle shaft, characterized in that the spindle shaft with the tool is located coaxially with the spindle shaft of the machine and is equipped with a planetary gear type, and the electrodynamic vibration exciter l is made in the form of inductors.

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