JPS5993247A - Numerically controlled mold machining device - Google Patents

Abstract

PURPOSE:To enable various kinds of molds to be consistently prepared, by providing a work supporting part, electric machining part, surface treatment part, milling machine, tool magazine and an automatic tool exchanger operated by the instruction of a numerical control device. CONSTITUTION:A numerical control device, controlling an automatic tool exchanger and taking out a prescribed milling cutter 34 from a tood magazine to be mounted, allows a milling machine 32 to perform roughing of a work 15 liftably mounted to a machining head 13. Next, the work, being moved in an electric machining tank 17, is electric discharge machined by applying a voltage pulse with an electric machining general mold electrode 25 taken out from the tool magazine by the automatic tool exchanger. And next, the work is ground and polished by the milling machine 32 to be finished to a mirror surface by lapping or the like then applied with anodizing treatment by forming a plating film through immersion in a surface treatment tank being moved immediately below the machining head 13. In this way, molds of various kinds and patterns can be consistently machined by numerical control.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a numerically controlled processing device that can perform integrated processing of various types of molds such as electroforming molds and injection molding molds.

These molds are manufactured through complicated processes using various machine tools, so process control is not necessarily easy.

Taking the electroforming mold used to manufacture an electroformed shell as an example, the material, that is, the workpiece, is first rough-machined with a milling cutter, then shaped by electrical machining such as electrical discharge machining, finished with a grinding finish, finished with a mirror finish, and surface oxidized. Although it is possible to devise a variety of processing methods, in order to adopt the most rational processing method, it is necessary to have a technology that is well-versed in all of these technologies. It requires people.

Furthermore, in the past, each of these steps was performed using separate machine tools and in factories far away, which often resulted in wasted time and manpower.

Furthermore, although these electroforming molds are not manufactured in large quantities at once, they are often manufactured repeatedly at approximately regular intervals, and some changes may be made based on the results of use. This is often the case. Therefore, it is extremely uneconomical to consider and plan processing methods each time according to these requirements, but in the past, recording and keeping records of these processing methods also required a lot of manpower. did.

The present invention has been made to solve the above-mentioned problems, and its purpose is to provide a single numerically controlled processing device that can manufacture various types of molds in an integrated manner.

The present invention will be explained in detail below with reference to the drawings.

FIG. 1 is a schematic plan view showing one embodiment of a numerically controlled processing apparatus according to the present invention, and FIG. 2 is a cross-sectional view taken along the cutting line (■--■) in FIG.

In the figure, 1 is a base, 2 and 3 are guides provided on the base 1, 4 is a numerical control device, 5 is a power supply circuit for various electrical machining, and 6 is for electrical machining such as electric discharge machining and electrolytic machining. 7 is a machining fluid supply device for grinding, 8 and 9 are machining fluid supply devices.
10 is a workpiece support unit consisting of a column 11, an arm 12, a processing head 13 and a stem 14, 15 is a workpiece, and 16 is a workpiece attachment device. 17 is an electric machining tank movably supported on the guide 2.3, 18 is an X-axis moving table 19, a Y-axis moving table 20, hydraulic cylinders 21, 21 and 22, and an X-axis Directional guidance 23.23
, Y-axis direction guide 24, 24, 25 is a rod-like or total electrode for electric machining mounted on the cross table 18, 26 is a pump unit for returning electro-machining fluid, and 27 is an electro-machining machine. Hydraulic cylinder for moving the tank, 28 is a surface treatment tank, 29 is a pump unit for returning surface treatment liquid, 30 and 31 are hydraulic cylinders for moving the surface treatment tank, 32 is a milling machine, 33
34 is a spindle supported rotatably and movably in two axes perpendicular to the central axis of rotation; 34 is a spindle 33;
A milling cutter 35 is attached to the tip of the milling cutter, 35 is a tool magazine containing milling cutters, abrasive tools and other various tools 36, 36, an electric machining unit 37, a grinding waste unit 38 for electrolytic grinding, etc., 39 is an automatic tool It is a replacement device.

In addition, in order to omit the drawings and omit complicated explanations, well-known parts that are not directly related to the present invention, in particular, the drive device and control device that operate the workpiece support 10 and the milling machine 32, In addition, illustrations of switching valves for operating each hydraulic cylinder, encoders for confirming operation, etc. are omitted.

Below, explanation will be given in accordance with the standard processing procedure.

The column 11 of the workpiece support section 10 supports the arm 12 so that it can move forward and backward, and can freely descend. A workpiece 15 is attached to the lower end of the stem 14 via an attachment 16, and the positions of the arm 12 and stem 14 are controlled by a known motor (not shown) controlled by a numerical control device 4. It is controlled by other actuators.

Workpiece 15 attached to processing head 13 so as to be able to rise and fall freely
is usually first roughly machined by a milling cutter ff132.

Automatic tool changer controlled by numerical controller 4! 3
Reference numeral 9 takes out a predetermined milling cutter 34 from the tool magazine 35 and attaches it to the tip of the spindle 33.

The milling machine 32 moves the rotation center axis of the spindle 33 to a specified position in response to a command from the numerical control device 4, and rotates the spindle 33 at a predetermined speed.

On the other hand, while the spindle 33 is rotating, a relative machining feed is applied between the milling cutter 34 and the workpiece 15, and the workpiece 15 is milled.

The automatic tool changer 39 changes the designated tool 36, 36 from the tool magazine 35 in response to a command from the numerical control device 4.
is taken out and replaced with the one attached to the milling machine 32.

During this milling operation, the electric machining tank 17 is evacuated to the position indicated by the broken line, and chips produced by the milling cutter are collected by a known collection device (not shown).

After the milling process is completed, the electric machining section performs electric machining such as electrical discharge machining and electrolytic machining.

The electrical processing section includes an electrical processing tank 17 and a cross table 181 accommodated therein. Hydraulic cylinder 21.2
1 and 22, hydraulic cylinder 27 for moving the electric processing tank
, a power supply circuit 5, a machining fluid supply bag W6 for electrical machining, and the like.

The electric processing tank 17 is movably supported along with the surface treatment tank 28 by a guide 2.3 provided below the processing head 13 so as to cross the front surface of the workpiece support 10, and is supported by a numerical control device 4. The moving hydraulic cylinder 27 in response to the command is moved along the guide 2.3 between the processing position shown by the solid line in the figure and the electrode exchange position shown by the dashed line.

Inside the electric machining tank 17, there is a cross table 18 and a hydraulic cylinder 21 which is its actuator.
．． 21.22 are provided. The cross table 18 includes an X-axis moving table 19 and a Y-axis moving table 20.
, hydraulic cylinders 21, 21 and 22, X-axis direction guide 23
．． 23, Y-axis guides 24, 24, and the X-axis moving table 19 is moved along the X-axis guides 23, 23 by a hydraulic cylinder 21, 21 in the The Y-axis moving table 20 placed on the moving table 19 is moved (fastened) in the Y-axis direction by means of a hydraulic cylinder 22 and a Y-axis guide 24.24.

In response to a command from the numerical control device 4, the automatic tool changer 39 selects a predetermined electrical machining mold 1 from the tool magazine 35! It
The pole 25 is taken out and mounted on the Y-axis direction moving table 20.

In such a case, the hydraulic cylinder 27 for moving the electric machining tank contracts according to a command from the numerical control device 4, and the electric machining tank 17 is moved to the machining position shown by the solid line. A predetermined machining fluid for electrical machining, such as kerosene, is supplied from the machining fluid supply device 6, and the hydraulic cylinder 21 is supplied with a command from the numerical control device 4.
．． , 21 and 22 are activated, and the workpiece 15 and electrical machining,
Bar shape or total amount 1! The relative position with the pole 25 is controlled so that they face each other with an appropriate machining gap, and at the same time, the power supply circuit 5
Voltage pulses etc. for electrical machining are supplied between both arms, electrical machining is performed on the workpiece 15, and the hydraulic cylinders 21, 21, 22 are operated based on commands from the numerical control device 4, or the arm 12 and the The actuation of the stem 14 provides processing feed, or further shape creation processing feed, to the rod-shaped or total electrode 25 for electrical processing.

When the predetermined electrical processing is completed, the electrical processing tank 17 is returned to the electrode exchange position, and then finishing processing is performed by grinding, polishing, etc. on the processed and formed surface.

Finishing is mainly done by attaching a polishing attachment to the milling machine 32, mechanically grinding and polishing the processed and formed surface by electrical machining, and finishing it to a mirror finish using techniques such as lapping and puffing. All machining feeds are also automatically performed according to commands from the numerical control device 4.

Moreover, if the electrolytic grinding unit 38 is prepared in the tool magazine 35, finishing to a predetermined state can be performed by electrolytic grinding.

That is, this electrolytic grinding unit 38 is equipped with an electrolytic grinding wheel, an electrolytic grinding power supply line, and an electrolytic grinding machining fluid supply nozzle, and the automatic tool changer operates based on instructions from a numerical controller. The electrolytic grinding unit is attached to and removed from a milling machine, and the milling machine performs electrolytic grinding on a workpiece using the electrolytic grinding unit based on commands from a numerical control device.

After finishing the processed and formed surface by milling and then electric machining to a predetermined mirror-like state, an oxide film for peeling off the formed electroformed shell is directly applied to this mirror-like formed surface by anodizing. Alternatively, a thin plating film of a metal matching the electroformed shell metal (e.g. Ni), such as Ni, may be formed on the processing and forming surface, and a part or most of this plating film may be formed as described below. It may also be made into SaW.

In order to form the plating film, the surface treatment tank 28 is moved to a processing position directly below the processing head 13.

The surface treatment tank 28 is divided into two wheels 28b by a partition plate 28a.
, 28c, and at this stage, Ni plating is performed in the first processing chamber 28b using the Ni plating solution sent from the first surface treatment solution supply device 8.

The processing head 13 lowers the workpiece 15 into the plating solution in the first processing chamber 28b, and current is supplied from the plating output terminal of the power supply circuit 5 to a known electrode (not shown) and the workpiece 15. ,? 1i plating is performed.

Next, this N+ plated surface (mirror surface) is anodized, which the inventors of the present invention proposed in Japanese Patent Application No. 1983-
This is a technique disclosed in No. 166536, in which an electric current of 0.08 to 0.24 coulombs per IC4 is applied to a mirror-finished surface to form an anodized film, and the resulting electroformed shell can be easily removed.

In order to perform this treatment, the workpiece 15 is transferred to the second treatment chamber 28.
chromic acid solution is supplied from the second surface treatment liquid supply device 9 into the processing chamber 28c of m2, the workpiece 15 is immersed in the solution, and the power supply is turned on according to a command from the numerical control device 4. Mouth? A predetermined amount of electricity is applied from 85, and then the chromic acid is recovered by the surface treatment liquid return pump unit 29, and further, water washing etc. are performed by a device (not shown).

Next, the process moves on to the process of producing an electroformed shell on the processed forming surface by electroforming, and the surface treatment tank is moved again, and the Ni plating thin film (mirror-like, Unlike the static plating state of formation, a dynamic electroforming method, in some cases a high-speed electroforming method that is about 10 times faster than conventional electroforming, is applied to the processed forming surface of the anodic oxide film. An electroformed shell to be peeled off and recovered later is formed to a desired thickness.

On the other hand, this high-speed electroforming method was developed by the present inventors in a patent application filed in 1983-
It is recommended to use the electroforming method disclosed in No. 125103, Japanese Patent Application No. 57-125104, etc., but it goes without saying that conventionally known methods may also be used. , when it becomes necessary to remove side products, etc., the workpiece 15 is pulled up from the electroforming liquid by commands from the numerical controller 4, and milling machines 32 and 1, which will be described later, are pulled up from the electroforming liquid.
1. Grinding: These removal processes are performed by electrolytic grinding using the L-knit 38 or ffl machining such as the above-mentioned electric discharge machining.

Further, when a predetermined electroforming process is completed, the workpiece 15 is similarly pulled up from the electroforming liquid by a command from the numerical control device 4, and the process is completed.

Since the present invention is constructed as shown on paper, it is an advantage of the present invention to provide a single numerically controlled processing device that can consistently produce a variety of molds.

Note that the configuration of the present invention is not limited to the embodiments on paper, and that the device of the present invention can be widely used with known machine tools and devices other than those described above within the scope of the purpose of the present invention. For example, as a tool to be attached to a milling machine, an electric machining unit equipped with a rod-shaped electrode, a power supply line for electric machining, and a machining fluid supply nozzle can be used, and it is also possible to arrange, replace, or replace these devices. The design of the method, the structure of the workpiece support section, etc. can be freely changed, and the power source, processing liquid supply device, etc. can also be changed, and the present invention encompasses all of them.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view showing one embodiment of a numerically controlled processing apparatus according to the present invention, and FIG. 2 is a cross-sectional view taken along the cutting line (■--■) in FIG. 1----------Base 2.3--Guide 4------1--Numerical controller 5--
−−−−−−−−1 power supply circuit 6−−−−1・−・−・−
Machining fluid supply device for electrical machining 7---------
--- Machining fluid supply device for grinding 8--1--
-----First surface treatment liquid supply device 9----1-
--------Second surface treatment liquid supply device 10...
−・−−1−−・−・Workpiece support part 11−−−
---1. ---・--Stem 15-------------One workpiece 16-
・−−−・−1−−−−Adapter 17− ・・−・−
---m-Electric processing tank 1B--------・--1-
----Cross table 19--・------X
Axial direction moving table 20...-------1----
Y-axis direction moving table 21.22・-11---Hydraulic cylinder for cross table 23------
---・X-axis direction guide 24------------
- Y-axis direction guide 25 - - - - - General electrode for electrical machining 26 - - m - Pump unit 27 for return of electro-machining fluid - −・Hydraulic cylinder 28 for moving the electric machining tank...−・・−・−
・-・Surface treatment tank 29...--Pump unit 30, 31 for surface treatment liquid return--Hydraulic cylinder 32 for moving surface treatment tank-------------
・Milling machine 33−・−−−−−−−・・・−・−Spindle 34−・−・−・・・−・・Milling cutter 35
・・−・・−・−・・−・Tool magazine 36・−・・
・−・−・−・・Engineer JL37−・−・−・−・−Electrical machining unit 38・,・−１−−・〜・−・Electrolytic grinding unit 39−・−・−・− ...... Automatic tool changer patent applicant - Inoue Ji + Pax Research Institute agent - (7524) Mogami Shotabe 27F

Claims (1)

[Scope of Claims] l) A numerically controlled processing device comprising the components described in Items 81 to (1) below. and a column and an arm for supporting the processing head, and a workpiece support section that operates upon receiving commands from the numerical control device. (C) A guide provided across the front surface of the workpiece support section. an electric machining tank supported movably between a machining position provided at least below the machining head and an electrode exchange position adjacent thereto by the guide device; and an electrode mounting tank provided in the electromachining tank. a cross table, an actuator for driving the cross table, a device for moving the electric machining tank on the guide, a device for supplying machining fluid to the electric machining tank, and an electrode and a target mounted on the cross table. An electric machining section that is equipped with a power supply circuit that can supply voltage pulses, etc. for electrical machining to the workpiece attached to the workpiece support section, and operates in response to commands from the numerical control device. A surface treatment tank supported movably between a processing position provided below the processing head and a retracted position adjacent thereto by a guide device provided across the front surface of the processing head; A device for moving a treatment tank, a device for supplying a surface treatment liquid into the surface treatment tank, a surface treatment electrode provided in the surface treatment tank, and a connection between the surface treatment electrode and the workpiece. A surface treatment section is equipped with a power supply circuit capable of supplying current for surface treatment in between, and operates upon receiving commands from the numerical control device. The receiver is a milling machine that operates. (f) A tool magazine that stores tools (including electrodes; the same applies hereinafter) used in the electric machining section and the milling machine. an automatic tool exchange device which is provided in a flexible manner and operates in response to commands from the numerical control device to attach and detach the tools in the tool magazine to and from the electric machining section and milling machine; 2) the tool magazine is The electric machining unit is equipped with a rod-shaped electrode, an electric machining power supply line, and a machining liquid supply nozzle, and an automatic tool changer attaches and detaches the electric machining unit to and from the milling cutter C based on commands from a numerical control device. , the milling machine is an α-controlled processing device according to claim 1, which is capable of electrically processing a workpiece using the electrical processing unit based on commands from a numerical control device. 3) The tool magazine is equipped with an electrolytic grinding unit that includes an electrolytic grinding wheel, an electrolytic grinding power supply line, and an electrolytic grinding machining fluid supply nozzle, and the automatic tool changer is configured to change the electrolytic grinding unit based on the commands of the numerical control device. The numerical control type according to claim m1, wherein the electrolytic grinding unit is attached to and detached from a milling machine, and the milling machine and the milling machine are capable of electrolytically grinding a workpiece using the electrolytic grinding unit based on commands from a numerical control device. Processing equipment.