JPH0366550A - Numerical control machine tool - Google Patents

Abstract

PURPOSE:To eliminate interruption of data readout to improve labour effectiveness, by once receiving tool data added to respective tools in the tool data memory of a controller, and drawing out necessary data from this to a machining program. CONSTITUTION:A memory element 11 is fitted on the backward end of the pull stud 9 of a tool holder 7. Nextly, a tool magazine 4 is moved one by one pitch, the pull stud 9 is opposed to a readout head, tool data stored in the memory element 11 is read out and received into a tool data memory 17 through an input/output control part 16. When all tool data are received, based on the tool data received in a computing and processing part 19, machining operation corresponding to the machining program received in a machining program memory 18 is performed. This operation is made as a completed machining program and input to a numerical control device 20, by drawing out necessary tool data from the memory 17 and charging them into a readout machining program.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a numerically controlled machine tool that extracts various data from a tool and controls the movement of the tool.

[Conventional technology] Conventionally, in machine tools such as machining centers that use a large number of tools, tool data such as the tool number, tool dimensions, cutting conditions, and life time of the tools to be used is introduced into the machine before machining begins. A method is used in which an operator operates the operation keys on the control panel to store the information in the data memory of the mwr.

However, with this method, input errors are likely to occur when entering tool data, and each time a new tool is set,
Since it is necessary to input the data of the tools set in the tool magazine, there is a drawback that the work is extremely time-consuming.

In addition, settings such as cutting conditions and life time are left to the creator who creates the machining program. Differences occur in the conditions of the tool data depending on the training, and especially when the creator is a beginner, there is a drawback that the set cutting conditions etc. tend to be unreasonable.

In contrast, recently, a memory element is attached to the tool or tool holder, and tool data such as tool number and tool dimensions is stored in advance in the memory element, and the data is read from the memory element during machining. Methods of doing this are being considered.

However, with the above method, each time the machining program requires tool data, it is necessary to read the necessary tool data from the memory element to the machine tool control device, so the work is frequently interrupted to read the data. Occurs in
The disadvantage is that work efficiency is low.

Additionally, if the memory element or reading device gets dirty with oil, dust, chips, etc. while using the tool, data transmission will become inaccurate.
There is a drawback that malfunctions are likely to occur.

The object of the present invention is to solve the above-mentioned drawbacks and to provide a numerical system i11 machine tool that can accurately read tool data added to each tool and perform efficient and stable machining.

(Means for Solving the i! Problem) In order to solve the above-mentioned problem, the present invention attaches to each tool a memory element that stores data regarding the respective tool, and provides a reading device that reads the tool data from the memory element. is connected to a control device, and the control device includes a data memory section that records the tool data read by the reading device, and a data memory section that outputs the tool data in the data memory section to the numerical control device based on a predetermined machining program. The structure includes an arithmetic processing section.

(Operation) In the above-mentioned Precept III, when the tool is stored in the tool magazine, the tool data added to the tool is read by the reading device and stored in the data memory of the control device.

For machining, the stored tool data from the data memory is read into a machining program, and based on the machining program, commands for machining operations are sent to the numerical control device to control the movement of the tool.

In the above device, the tool data is stored in the data memory in the control device and machining is performed, so there is no interruption during work to read the tool data, and there is no problem even if the memory element or reading device gets dirty during machining. Processing can be performed without being affected.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the machining center 1 of the embodiment includes a table 2 that is movable on a horizontal plane and a vertical main spindle 3, and a plurality of tools are stored on the side of the main spindle 3. A tool magazine 4 is attached. Further, a tool changer 5 is provided between the tool magazine 4 and the spindle 3 to move tools between the two.

The tool magazine 4 has a large number of tool storage pockets 6 arranged along its outer periphery in which tool holders 7 can be removably stored, and a tool 8 is held in the tool holder 7 in each tool storage pocket 6. It is designed to be stored in

Each of the tool holders 7 is provided with a tapered shank portion 7a, and a pull stud 9 for mounting the tool holder 7 on the spindle 3 is screwed into the end of the shank portion 7a. In addition, a tool holder 7 is provided on the rear end surface of the pull stud 9.
A circular hole 10 is formed with its center axis coincident with the axis of , and a memory element 11 is mounted within the circular hole 10 .

The memory element 11 is a disk-shaped chip containing an electromagnetic coil for non-contact data communication with the outside, and has a memory such as an EEFROM inside. This memory contains data about the tool to which the pull stud is attached. It is stored so that it can be read and written via electromagnetic waves generated by a magnetic coil.

On the other hand, a reading device 12 for reading data from the memory element 11 is provided in a portion of the tool magazine 4 facing the tool storage pocket 6. This reading device 12 includes a reading head 13, which is an electromagnetic coil, and a reading head 13, which is an electromagnetic coil.
The reading controller 14 converts the detected signal into an output signal to the outside.
6.

The control device 15 receives signals from an input/output control unit 16 that amplifies and aligns input/output signals, a tool data memory 17 connected to the input/output control 16, a machining program memory 18, and both memories 17 and 18. The calculation processing unit 19 outputs control signals to the outside. In the machining program memory 18, a machining program without tool data is stored in advance through an operation key or the like before the start of work.

In addition, the arithmetic processing section 19 includes a numerical control device 20.
When a control signal is input from the arithmetic processing section 19, the numerical control device 20 issues operation control signals to the spindle 3, table 2, tool changer 5, etc. based on the signal.

This embodiment has the structure described above, and its operation will be explained next.

When performing machining work, first, insert the tool magazine 4.
At the stage where the tool holder 7 is set, a command to read the tool data is given to the arithmetic processing section 19 of the control device 15. When this command is received, the arithmetic processing unit 19 rotates the tool magazine 4 one pitch at a time in the tool storage pocket 6, so that the pull studs 9 of each tool holder 7 face the reading head 13, and the data is stored from the reading head 13. By performing an operation of generating electromagnetic waves toward the element 11, the memory element 1
1, the tool data stored therein is read out and stored in the tool data memory 17 via the input/output control section 16.

In this way, the reading head 13 is made to face all the tool holders 7 of the tool magazine 4, and the tool data is read and stored in the tool data memory 17. As a result, the tool data memory 17 stores data related to tools as shown in Table 1 below.

When all the tool data is stored in the tool data memory 17, the arithmetic processing unit 19 starts machining operation according to the machining program stored in the machining program memory 18 based on the stored tool data. This operation involves pulling out necessary tool data from the tool data memory 17 and substituting it into the machining program read out from the machining program memory 18, and then numerically controlling control commands based on the machining program completed with the tool data. It is output to the device 20.

When the numerical control device 20 receives the above command, it drives the spindle 3 and the tool changer 5 to execute machining. In this way, all the tools perform the above operations to perform the planned machining.

When all the machining is completed, if the tools in the tool magazine 4 are to be used again, the tool data in the data memory 17 is retained as is in preparation for the next machining. Further, by removing a tool from the tool magazine 4, the tool data corresponding to the removed tool inside the data memory 17 is automatically erased.

Although the above-mentioned embodiment shows an example of application to a machining center, it can be similarly applied to other numerically controlled machine tools equipped with a tool magazine, such as an NC drilling machine or an NC lathe.

〔Effect of the invention〕

As explained above, according to the present invention, the tool data added to each tool is stored in the tool data memory of the primary control device, and necessary tool data is retrieved from the data memory into the machining program to perform machining. Because it is a thing,
There is no problem with machining even if there is an interruption to read data during work or if the memory element etc. becomes dirty with oil, resulting in accurate and stable machining.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment according to the present invention, and FIG.
The figure is a block diagram showing the main parts of the same as above. 1... Machining center, 4... Tool magazine, 7... Tool holder, 8... Tool, 9... Pull stud, 11... ...Memory element, 12...
...reading device, 13...reading head, 14...reading controller, 15...
...control device, 16...input/output control section, 17
...Tool data memory, 18...Machining program memory, 19...
...Arithmetic processing unit, 20...Numerical control device. same

Claims (1)

[Claims] (1) In a numerically controlled machine tool that is equipped with a tool magazine that stores multiple tools and performs machining by selecting any tool from the tool magazine based on control from a numerical control device,
A memory element storing data related to each tool is attached to each of the tools, and a reading device for reading tool data from the memory element is connected to a control device, and the control device stores the tool data read by the reading device. A numerically controlled machine tool comprising: a data memory section; and an arithmetic processing section that outputs tool data in the data memory section to the numerical control device based on a predetermined machining program.