CN103817388B - A kind of device for preparing the fine milling cutter of screw type hard alloy - Google Patents

Abstract

The invention provides a device for preparing helical carbide micro milling cutters using micro electrolysis technology, which is characterized in that it includes: electrolyte tank (1), tubular electrode (2), tubular electrode fixture (3), spiral hard alloy Quality alloy micro milling cutter (4), tool holder (5), motor one (6), lead screw (7), motor two (8), electrolyte tank inlet pipe (9), electrolyte storage box (10 ), electrolyte tank drain pipe (11), pressure pump (12), filter (13), valve (14), motion platform (15), workbench (16), using the good dissolution localization of fine electrolysis And surface quality control ability, using the electric field concentrated distribution near the end face of the electrode in electrolytic machining of tubular electrodes, taking advantage of the relatively small stray corrosion of sodium nitrate solution, sodium chlorate solution or their mixed solution, can achieve high precision and high efficiency , low-cost preparation of spiral carbide micro milling cutter.

Description

A device for preparing helical carbide micro milling cutter

technical field

The invention belongs to a milling cutter preparation device, in particular to a device for preparing a spiral hard alloy micro milling cutter by using micro electrolysis.

Background technique

At present, there are a variety of processing devices that can produce micro milling cutters, but there are still many serious problems in many aspects. The existing process devices for preparing micro milling cutters include: (1) wire electric discharge grinding device; (2) laser processing device; (3) precision micro grinding device; (4) focused ion beam sputtering device; 5) Electrolytic EDM composite micromachining device. When using the electric discharge wire electrode grinding device to prepare, electric erosion pits will be formed on the cutting edge and cutting surface of the milling cutter tool, thereby forming a surface deterioration layer, microscopic cracks and residual tensile stress; The defect of the electrode grinding device is that the heat conduction during the laser machining of the micro milling cutter will form a heat affected zone, and there are also microscopic cracks and thermal stress in this area; the use of the precision micro grinding device can meet the requirements of the micro milling cutter preparation to a certain extent. However, due to the influence of the grinding force, the minimum diameter of the tool that can be stably obtained is limited; when the focused ion beam sputtering device is used to prepare the micro milling cutter, the processing efficiency is too low and the cost is too high while ensuring high precision. High disadvantages, it is impossible to realize large-scale preparation of micro-milling cutters; electrolytic EDM has the defects of serious material overcutting and difficult to guarantee machining accuracy.

Therefore, finding a high-precision, high-efficiency, and low-cost processing device to prepare high-precision, high-strength micro-milling cutters is a bottleneck problem in micro-milling preparation, and it is one of the key core issues in the field of micro-tool preparation at present. It is also the development of the micro-manufacturing industry. objective needs.

Contents of the invention

The purpose of the present invention is to design a device for preparing spiral carbide micro milling cutters based on micro electrolysis technology. The device utilizes the advantages of micro electrolysis technology to achieve high precision, high efficiency and low cost. Quality alloy micro milling cutter.

The invention provides a device for preparing spiral hard alloy micro milling cutters by micro electrolysis, which is characterized in that it includes: an electrolyte tank, which provides a processing environment for micro electrolysis; a tubular electrode, fixed by a tubular electrode fixture, and used as a tool electrode after being energized It is prepared with carbide micro milling cutter; tubular electrode fixture, used for clamping and positioning tubular electrode; spiral carbide micro milling cutter; tool holder, used for moving and clamping the prepared micro milling cutter, through control The tool reaches the processing position; the first motor provides power for the movement platform to feed up and down; the second motor provides power for the rotation of the tool holder; the pressure pump provides power to spray the electrolyte from the tubular electrode and ensure the circulation of the electrolyte; The valve controls the circulation of the electrolyte between the electrolyte storage tank and the electrolyte tank, and stops the flow when it is closed; the electrolyte tank inlet pipe makes the electrolyte spray out from the tubular electrode; the electrolyte storage tank stores Electrolyte storage; electrolyte tank drain pipe, so that the electrolyte flows back to the electrolyte storage tank; filter, to prevent the electrolysis products generated during electrolysis from flowing into the electrolyte tank with the electrolyte; workbench, supporting; lead screw, The first motor drives the motion platform to feed up and down; the second motor and the tool holder are placed on the motion platform. Among them, the tubular electrode is placed in the electrolyte tank, the helical carbide micro milling cutter is connected with the second motor through the tool holder, and the electrolyte is powered by a pressure pump, which passes through the filter and the pressure pump in turn from the electrolyte storage tank. After the electrolyte tank enters the liquid pipe, it sprays out from the tubular electrode into the electrolyte tank, and flows back into the electrolyte storage tank after passing through the electrolyte tank drain pipe and valve.

Preferably, the tubular electrode is a titanium tubular electrode with a diameter of less than 400 μm and side insulation;

Preferably, the diameter of the cemented carbide micro milling cutter is below 1000 μm;

Preferably, the device also includes motor one, motor two and a motion platform to realize the up and down and rotary motion of the tool;

Preferably, the electrolyte is a non-strong acid or alkaline electrolyte, such as sodium nitrate solution, sodium chlorate solution or a mixed solution thereof;

Compared with the prior art, the present invention has the following beneficial effects:

(1) Micro electrolysis has good dissolution localization and excellent surface quality control ability, so it is very beneficial to the forming of the cutting edge and cutting surface of cemented carbide micro milling cutter;

(2) The use of tubular electrodes in the electrolytic preparation of cemented carbide micro milling cutters can make the electric field concentrated and distributed near the end faces of the tube electrodes, effectively improving the processing efficiency;

(3) Sodium nitrate solution, sodium chlorate solution or their mixed solution is used in the electrolytic preparation process of cemented carbide micro milling cutter, which has less stray corrosion, high forming precision and good tool size control ability.

Description of drawings

Fig. 1 is a schematic diagram of a device for electrolytically preparing a helical carbide micro-milling cutter with a tubular electrode;

Fig. 2 is a schematic diagram of the electrolyte flow direction of the helical carbide micro milling cutter prepared by electrolysis of the tubular electrode;

Fig. 3 is a schematic diagram of the processing principle of the electrolysis of the tubular electrode to prepare the helical carbide micro milling cutter.

detailed description

A device for preparing helical carbide micro milling cutters by micro electrolysis shown in Fig. 1 and Fig. 2, which includes: electrolyte tank 1, tubular electrode 2, tubular electrode holder 3, helical carbide micro milling cutter 4. Tool holder 5, motor one 6, lead screw 7, motor two 8, electrolyte tank inlet pipe 9, electrolyte storage tank 10, electrolyte tank drain pipe 11, pressure pump 12, filter 13, valve 14, motion platform 15, workbench 16. Wherein, the electrolyte tank 1 is set on the workbench 16, the tubular electrode 2 is placed in the electrolyte tank 1, clamped by the tubular electrode clamp 3, the tubular electrode 2 is connected with the electrolyte tank inlet pipe 9, and the spiral hard The high-quality alloy micro milling cutter 4 is connected to the motor 2 through the tool holder 5, and the electrolyte is powered by the pressure pump 12. After being sprayed out from the tubular electrode 2, it enters the electrolyte tank 1, and passes through the electrolyte tank drain pipe 11 in turn. , the valve 14, flows back in the electrolyte storage tank 10, and through the filter 13, the pressure pump 12, the electrolyte tank inlet pipe 9 enters the tubular electrode 2 again, and circulates. The motor one 6 is fixed on the workbench 16 and links to each other with the leading screw 7, and the leading screw 7 controls the motion platform 15 to make the helical carbide micro milling cutter 4 feed up and down.

When preparing the helical carbide micro milling cutter, the helical carbide micro milling cutter 4 should be put into the tool holder 5 first, and fixedly clamped; according to the size and requirements of the processing tool, input the processing data and prepare for processing; At this time, the valve 14 is closed, the pressure pump 12 is started, and the electrolyte in the electrolyte storage tank 10 passes through the filter 13 and the pressure pump 12 successively, and enters the tubular electrode 2 from the liquid inlet pipe 9 of the electrolyte tank, and then injects the electrolyte In tank 1, when the liquid level reaches a certain height, turn on motor 1 6 and motor 2 8, valve 14, and the processing starts; tubular electrode 2 processes the helical carbide micro milling cutter 4, and motor 1 6 controls the speed of the cutter according to the requirement Feed down, the electrode 2 8 drives the cutter to rotate at the required speed, and at the same time, the electrolyte flows back into the electrolyte storage tank 10 through the electrolyte tank drain pipe 11, so as to circulate; after the preparation is completed, the electrolyte passes through the electrolyte Groove discharge pipe 11, valve 14 flow back in the electrolyte storage tank 10, turn off power supply, can take off cutter.

Wherein, the tubular electrode 2 specifically includes the following steps when processing the tool helical carbide micro milling cutter 4:

Step 1, use the tubular electrode 2 as the geometric feature bus of the tool, and then generate motion relative to the tool body according to a predetermined trajectory;

Step 2, turn on the pressure pump 12, so that the electrolyte in the electrolyte storage tank 10 passes through the filter 13, the pressure pump 12, enters the tubular electrode 2 from the liquid inlet pipe 9 of the electrolyte tank, and then injects it into the electrolyte tank 1, When the liquid level reaches a certain height, turn on motor 1 6 and motor 2 8, valve 14, and start processing;

Step 3, according to processing requirements, motor one 6 drives the moving platform 15 to feed downward at a certain speed through the lead screw 7, and at the same time, motor two 8 drives the spiral carbide micro milling cutter 4 to rotate through the tool holder 5;

Step 4, after the processing is completed, the pressure pump 12 and the power supply are turned off, and after all the electrolyte flows into the electrolyte storage tank 10, the valve 14 is closed, and the tool is removed.

What is described above is only an implementation example of the present invention, and should not sequentially limit the implementation scope of the present invention. That is, all equivalent changes and modifications made according to the patent scope of the present invention should still fall within the scope covered by the claims of the present invention.

Claims (3)

1. a kind of micro-electrochemical machining prepares the device of the fine milling cutter of screw type hard alloy, it is characterised in that including：Electrolytic bath, Processing environment is provided to micro-electrochemical machining；Hollow edged electrode, is fixed by hollow edged electrode fixture, as tool-electrode to fine after energization It is prepared by milling cutter；Hollow edged electrode fixture, for clamping and positioning hollow edged electrode；Fine milling cutter；Tool mounting, it is micro- for moving and clamping Thin milling cutter, makes fine milling cutter reach Working position by control；Motor one, power is provided for motion platform bottom and top feed；Motor Two, it is tool mounting powered rotation；Compression pump makes electrolyte be sprayed from hollow edged electrode there is provided power, and ensures electrolysis Liquid recycle stream is moved；Valve, control electrolyte is circulated between electrolyte storing box and electrolytic bath, during closing, stops stream It is dynamic；Electrolytic bath feed tube, makes electrolyte be sprayed from hollow edged electrode；Electrolyte storing box, stores electrolyte；Electrolytic bath is arranged Liquid pipe, makes electrolyte flow back to electrolyte storing box；Filter, prevents the electrolysate produced during electrolysis from flowing into electrolyte to be electrolysed Liquid bath；Workbench, plays a supportive role；Leading screw, motor one drives motion platform bottom and top feed to move by it；Motion platform, its Upper placement motor two and tool mounting；Wherein, hollow edged electrode is placed in electrolytic bath, and fine milling cutter passes through tool mounting and motor Two connections, electrolyte provides power by compression pump and filter, compression pump is sequentially passed through from electrolyte storing box, passes through electrolysis After liquid bath feed tube, sprayed from hollow edged electrode and enter electrolytic bath, electrolysis is flowed back to after electrolytic bath discharging tube and valve In liquid storing box；The electrolyte is non-strong acid electrolyte, and the non-strong acid electrolyte uses sodium nitrate solution, sodium chlorate solution Or both mixed solution.

2. micro-electrochemical machining according to claim 1 prepares the device of the fine milling cutter of screw type hard alloy, it is characterised in that： The hollow edged electrode is the titanium hollow edged electrode that diameter is less than 400 μm of side insulations.

3. micro-electrochemical machining according to claim 1 prepares the device of the fine milling cutter of screw type hard alloy, it is characterised in that： The diameter of the fine milling cutter is below 1000 μm.