JPS6026648B2 - Electric processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a tortoise machining device in which when a skilled worker processes a workpiece according to desired machining characteristics, the electrical machining conditions used are stored in a storage device. This invention relates to an electric current machining device that reads the stored contents at a suitable time and performs the machining when machining with the same type of machining characteristics is to be performed later.

The following is an explanation using electrical discharge machining as an example. Conventionally, in electric discharge machining, machining is generally performed as shown in FIG.

That is, in FIG. 1, 1 is an electrode, 2 is a workpiece facing the electrode 1 through a machining gap 3, 4 is a machining liquid, 5 is a DC power source that applies a machining voltage to the machining gap 3, and 6 is a transistor, etc. A pulse current is supplied to the machining gap 3 by intermittent operation of the switch element 6.

7 is a control circuit that provides a pulse signal to the switch element 6; 8;
1 is an operation panel having a changeover switch 9, and this operation panel 8 and changeover switch 9 constitute electrical processing condition setting means. 10 is a servo ring that drives the electrode 1; 11 is a servo valve; 12 is a control coil for the servo valve 11;
13 is a sensitivity resistor, and 14 is a reference voltage setting circuit.

The conventional device is configured as described above, and the pulse current shown in FIG. 2 is supplied to the machining gap 3, and the workpiece 2 is
electrical discharge machining is performed.

In FIG. 2, 15 represents the current peak value, 16 represents the pulse application time, and 17 represents the rest time. The voltage eg of the machining gap 3 is compared with the output reference voltage ec of the reference voltage setting circuit 14, and the difference voltage causes a current to flow through the control coil 12 through the sensitivity resistor 13, which causes the servo valve to The cylinder 10 is driven and the electrode 1
moves up and down, and the machining gap 3 is controlled to be constant. By the way, electrical discharge machining characteristics such as electrode consumption ratio in bottoming machining, surface roughness, or clearance in punching are closely related to electrical machining conditions such as current peak value 15, pulse application time 16, pulse rest time 17, etc. shown in Fig. 2. Therefore, it is necessary to select the above electrical machining conditions before machining.

However, these selections require considerable skill and experience as they are searched from a large amount of data such as data books that contain a large amount of data showing the desired processing characteristics and electrical processing conditions. It was usual. However, it is generally extremely difficult to train and retain a large number of skilled workers who can select such electrical processing conditions.
This invention has been made in view of the above-mentioned problems, and includes storing a plurality of electrical machining conditions corresponding to desired machining characteristics selected by a certain skilled worker in a storage device. An object of the present invention is to provide an electrical machining apparatus that can read out target electrical machining conditions from the stored contents at a timely manner and process a workpiece.

An embodiment of the present invention will be described below with reference to the drawings.

That is, FIG. 3 is a diagram showing one embodiment of the present invention. In this figure, 18 is a holding means for holding the electric machining conditions set by the electric machining condition setting means consisting of the operation panel 8 and the changeover switch 9; The display circuit displays the contents of the holding means 18 and confirms the contents by displaying the written contents during a write operation and the read contents during a read operation.

Reference numeral 20 denotes a drive circuit 21 that extracts information from the holding means 18, an address selection means, 22 a command circuit that provides a signal to the address selection means 21, and 23 a storage device, for example a core memory stack, in which the holding means is drawn out from the drive circuit 201. 1
8 pieces of information, and it is possible to store as many electrical processing conditions as the number of owned addresses.

Further, 24 is a reading means for reading out information stored by the core memory stack 23. Note that the other parts are the same as those described in FIG. 1, so the description thereof will be omitted. Next, the operation of this inventive device will be explained.

A skilled worker operates a changeover switch 9 on an operation panel 8 based on his or her own experience to set electrical machining conditions corresponding to desired machining characteristics, and performs a certain type of machining. At this time, from the start of machining to the end of machining, the skilled worker constantly monitors the operation panel so that the electrical machining conditions are adapted to the machining conditions that change as the machining progresses. A series of machining operations performed by the enthusiastic worker is temporarily stored in the holding means 8 from the operation panel 8, and sent to the address selection means 21 from the command circuit 22 in order of, for example, the largest current peak value or the longest pulse width. When the address is specified, the drive circuit 20
The contents of the holding means 18 are then stored in the core memory stack 23 according to the corresponding address. Thereafter, a plurality of electrical machining conditions corresponding to the machining characteristics of each workpiece can be stored in the core memory stack 23 in the same manner. Similarly, even during processing, a single condition can be stored at a designated memory address from the operation panel 8 via the holding means 18. next,
When reading out the stored contents, for example, the core memory stack 23 can be read out by the drive circuit 20 by specifying an address by the command circuit 22 based on a program for performing the desired machining by a series of machining operations performed by a skilled worker. state and read out using the reading means 24.

The read contents are held in the holding means 18 and given to the control circuit 7 in the same form as the output from the operation panel 8. Note that the contents of the holding means 18 are displayed on the display circuit 19 as described above. In addition, with this device, if you want to change the conditions during machining, you can change the electrical machining conditions from the operation panel 8 and store it in the same or different designated memory address via the holding means 18. can.

According to the device of the present invention, all operations can be performed by giving commands to the command circuit 22 based on a program, and the number of dew processing conditions to be stored can be increased by increasing the capacity of the core memory stack 23. can be easily increased by

In the above embodiment, a core memory is used as the storage device, but it is also possible to use another storage device such as a semiconductor storage element in the core memory portion.

Furthermore, the device of the present invention is not limited to electric discharge machining, but can also be applied to electrical machining such as electrolytic machining without departing from its spirit.

As explained above, according to the device of the present invention, when the electrical machining conditions required for electrical machining are set by a skilled worker, they are stored in the storage device. It can be read out at the appropriate time and used repeatedly during processing, so unlike electric processing equipment, it is necessary to set the electrical processing conditions each time according to the desired processing characteristics of the workpiece, and the setting requires skill. In other words, it is highly effective for processing equipment that requires a high level of skill in setting electrical processing conditions and that performs processing under conditions where different electrical processing conditions coexist. .

Further, since the device of the present invention is based on the storage device being controlled by an addressing device based on an external command, it is possible to randomly retrieve stored information contents.

Therefore, there is an advantage that arbitrary information content can be obtained by giving a desired external command, and it exhibits superior effects compared to a device that retrieves information content according to the stored order of subordinates.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a conventional device, FIG. 2 is a diagram showing a pulse current waveform used during electric discharge machining, and FIG. 3 is a diagram showing an embodiment of the inventive device. In the figure, 1 is an electrode, 2 is a workpiece, 3 is a machining gap, 5 is a DC power supply, 6 is a switch element, 7 is a control circuit, 8 is an operation panel, 1 is a servo cylinder, 11 is a servo valve, 1
4 is a reference voltage setting circuit, 18 is a holding means, 19 is a display circuit, 20 is a driving circuit, 21 is an address selection means, 23 is a core memory stack, and 24 is a reading means. Note that the same reference numerals in the figures indicate the same or equivalent parts. Figure 2 Ship map ball

Claims (1)

[Claims] 1. An energization processing device that processes the workpiece by applying current to a machining gap formed by an electrode and the workpiece, which process changes as the machining progresses during the energization processing of the workpiece. An electric machining condition means for setting electric machining conditions adapted to the state, and a plurality of electric machining conditions corresponding to the machining characteristics of each workpiece set by the electric machining condition setting means are stored in a specified address. an addressable storage device, address selection means for selecting an address of the storage device, readout means for reading out the electrical processing conditions at the specified address of the storage device, a holding means for holding electrical processing conditions or electrical processing conditions read by the reading means; a device for processing a workpiece according to the electrical processing conditions held by the holding means; and an electrical processing condition setting means. A display means for displaying the electrical processing conditions set by or read by the reading means, and the address selection means, reading means and holding means, the electrical processing conditions are stored in or read out from the storage device. An electrical machining device comprising command means for controlling.