CN112975018A

CN112975018A - Focusing ultrasonic vibration device applied to electric spark machining

Info

Publication number: CN112975018A
Application number: CN202110293435.XA
Authority: CN
Inventors: 董颖怀; 刘佳军; 王岩; 朱贵升; 蔡清睿
Original assignee: Tianjin University of Science and Technology
Current assignee: Tianjin University of Science and Technology
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2021-06-18

Abstract

The invention discloses a novel focusing ultrasonic vibration device applied to electric spark machining, which belongs to the field of ultrasonic auxiliary machining and comprises an outer cabin body, a ball screw rod group, a fixed block, an ultrasonic transducer, an inner cavity, a connecting rod and a workbench, wherein the outer cabin body is provided with a plurality of ball screw rods; the bottom plate and the side plate of the inner cavity are respectively provided with an ultrasonic transducer, so that the energy of ultrasonic vibration is effectively converged to the workbench, and the electric spark machining efficiency is improved; the workbench is indirectly connected with the inner groove through the ball screw rod group, so that the direct influence of the vibration of the ultrasonic transducer on a machined workpiece is reduced, and the possibility of researching the influence of ultrasonic energy on electric spark machining is improved; the ball screw group can realize the height adjustment of the workbench, so that the optimal position for focusing ultrasonic energy can be found conveniently; an oil discharge port is arranged in the device; the invention aims to research the influence of ultrasonic vibration energy on electric spark machining and is suitable for most electric spark machine tools.

Description

Focusing ultrasonic vibration device applied to electric spark machining

Technical Field

The invention relates to the technical field of ultrasonic auxiliary machining, in particular to a novel focusing ultrasonic vibration device applied to electric spark machining.

Background

With the development and progress of science and technology, various new materials with high hardness, high strength, high brittleness and high viscosity are continuously generated, and more parts with various complex structures and special process requirements are required; the electric discharge machining is widely popularized due to great advantages when the electric discharge machining is used for machining workpieces with complex shapes or harder materials; but its stability is insufficient and the material removal rate is low because it has fatal disadvantages. In order to improve the state of electric spark discharge, reduce arc discharge and short circuits and improve the efficiency of electric spark discharge, researchers try to combine electric spark machining with ultrasonic machining, and add vibration on the basis of electric spark machining. However, due to the limitation of equipment and other conditions, the research on the influence of ultrasonic vibration energy, cavitation and other phenomena on electric spark machining is very limited.

Disclosure of Invention

The invention aims to provide a focusing ultrasonic vibration device applying electric spark machining, which can isolate the direct contact of the vibration of an ultrasonic transducer to a workpiece, reduce the direct influence of the vibration of the workpiece on the machining, increase the feasibility of researching the ultrasonic vibration energy on the electric spark machining, improve the material removal rate of the electric spark machining and improve the surface quality of the workpiece.

The invention provides the following technical scheme:

a novel focused ultrasonic vibration device applied to electric discharge machining comprises: the ultrasonic energy-saving cabin comprises an outer cabin body and an inner cavity, wherein an ultrasonic transducer is respectively arranged on a bottom plate and a side plate of the inner cavity; the workbench is indirectly connected with the inner groove through a ball screw rod group; an oil discharge port is arranged in the inner cavity of the device.

Furthermore, an ultrasonic transducer is respectively arranged on the bottom plate and the side plate of the inner cavity in a gluing mode, the frequency of each transducer is 40kHz, and the power of each transducer is 100W.

Further, the inner cavity bottom plate is connected with an oil drain port; kerosene is placed in the inner cavity, and the workbench is placed below the liquid level.

Furthermore, the workbench is a rectangular thin plate and is connected with the fixed block on the ball screw group through four connecting rods.

Furthermore, the direction of the oil outlet is the width direction of the outer cabin body, and a control valve is arranged.

Furthermore, the outer cabin body is provided with a ball screw group, and the workbench can move up and down and fine adjust the height by manually controlling a top control knob.

Furthermore, the ball screw rod group is connected with the workbench through the connecting rod, so that the direct influence of the vibration of the ultrasonic transducer on the workpiece is isolated.

Drawings

FIG. 1 is a perspective view of a focused ultrasonic vibration apparatus;

FIG. 2 is a front view of a focused ultrasonic vibration device;

fig. 3 is a structural plan view of the focused ultrasonic vibration device.

Wherein, 1-inner cavity side plate, 2-ultrasonic transducer 100W, 3-ball screw rod group, 4-sewer pipe, 5-workbench, 6-inner cavity bottom plate, 7-control knob, 8-outer cabin body, 9-fixed block, 10-workbench connecting rod, 11-side plate, 12-cover plate, 13-ultrasonic transducer, 14-oil drain port, 15-side cover plate

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting. Rather, these examples are provided so that the reader will be more fully aware of the present disclosure.

As shown in fig. 1 to 3, a focused ultrasonic vibration device for electrical discharge machining according to an embodiment of the present invention includes an outer chamber body composed of a bottom plate 8, a side plate 11, a cover plate 12, a side cover plate 15, and the like; an inner cavity side plate 1 is arranged in the outer cabin body, an inner cavity bottom plate 6 is respectively provided with an ultrasonic transducer 2, the bottom of the inner cavity bottom plate 6 is provided with an oil drain port 14, the oil drain port 14 is connected with a sewer pipe 4, the upper part of the inner cavity bottom plate 6 is provided with a workbench 5, and the workbench 5 is connected with a ball screw 3 through a workbench connecting rod.

The outer hull as shown in fig. 1 to 3 is indirectly connected to the inner hull through a set of ball screws 3 for supporting the inner hull structure. The inner cavity comprises four lateral plates and a bottom plate 6, an ultrasonic transducer 2 is respectively arranged on the inner cavity bottom plate 6 and the lateral plate 1 in a gluing mode, the frequency of the transducer is 40kHz, the power of the transducer is 100W, and the ultrasonic transducer 2 transmits ultrasonic energy to the workbench through oil in two directions of the bottom surface and the side surface, so that the ultrasonic focusing effect is achieved. The bottom of the inner cavity bottom plate 6 is provided with an oil discharge port 14, the oil discharge port 14 is connected with the downcomer 4, and the oil discharge port is provided with a control valve for controlling kerosene to flow out from the downcomer 4.

As shown in fig. 1 to 3, the upper part of the inner cavity bottom plate 6 is provided with a workbench 5 for placing workpieces, 4 ball screw groups 3 are symmetrically distributed outside the inner cavity side plate 1, the workbench 5 is connected with a fixed block 9 on the ball screw group 3 through 4 connecting rods 10, the workbench 5 is controlled by a manual control knob 7 at the top of the ball screw group 3 to move up and down, and therefore the height of the workpieces is finely adjusted, and the purpose of focusing ultrasonic vibration on the surface of the workbench is achieved.

The specific implementation process comprises the following steps: the whole device is placed on an electric spark machining machine tool, a workpiece is placed on a workbench, ultrasonic energy is transmitted by controlling an ultrasonic transducer, and the height of the workbench is adjusted by manually controlling a control knob at the top of a ball screw group, so that the height of the machined workpiece is adjusted, the optimal machining height is searched, and the electric spark machining of ultrasonic focusing is realized; the residue after the electric spark machining can be discharged from the inner cavity together with the kerosene through a sewer pipe.

Of course, other embodiments of the invention are possible, and what has been described above is merely a preferred embodiment of the invention; without departing from the inventive concept, several variations and modifications may be made, all of which are within the scope of the invention.

Claims

1. A novel focused ultrasonic vibration device applied to electric spark machining is characterized in that: the ultrasonic wave generator comprises an outer cabin body and an inner cavity, wherein an ultrasonic transducer is respectively arranged on a bottom plate and a side plate of the inner cavity; the workbench is indirectly connected with the inner groove through a ball screw rod group; an oil discharge port is arranged in the inner cavity of the device.

2. The focused ultrasonic vibration device of claim 1, wherein: an oil discharge port is formed in the inner cavity bottom plate; kerosene is placed in the inner cavity, and the workbench is placed below the liquid level.

3. The focused ultrasonic vibration device of claim 1, wherein: the inner cavity bottom plate and the side plate are respectively provided with 1 ultrasonic transducer in a bolt connection and gluing mode, the frequency of each transducer is 40kHz, and the power of each transducer is 100W.

4. The focused ultrasonic vibration device of claim 1, wherein: the workbench is a rectangular thin plate and is connected with the fixed block on the ball screw group through four connecting rods.

5. The focused ultrasonic vibration device of claim 2, wherein: the direction of the oil outlet is the width direction of the outer cabin body, and a control valve is arranged.

6. The focused ultrasonic vibration device of claim 1, wherein: the outer cabin body is provided with a ball screw group, and the top control knob is manually controlled to enable the workbench to move up and down and finely adjust the height.

7. The focused ultrasonic vibration device of claim 4, wherein: the ball screw rod group is connected with the workbench through the connecting rod, so that the direct influence of the vibration generated by the ultrasonic transducer on the workpiece is isolated.