JPH0453654A - Tool for measuring tool dimension - Google Patents

Abstract

PURPOSE:To improve working efficiency by juxtaposing a measuring instrument for measuring a tool dimension and holder for exchanging tool at the upper part of a base. CONSTITUTION:A tool 5 for measuring a tool dimension is first placed on a pallet 11 on taking out of a tool magazine 16 by using a tool exchange device 18, in the case of performing the measurement and memory of the tool dimension. The dimension measurement and memory of a using tool 15 are performed with the use of a measuring instrument 3 in this state and thereafter the tool 5 is stored in a tool magazine 16 with the use of the tool exchange device 18. The need for the installation space of the measuring instrument 3 on the pallet 11 is eliminated in the workpiece processing time and therefore the workpiece fitting space can be obtained in a wide range and the working efficiency can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a tool dimension measuring tool used in an NC machine tool equipped with a tool changer.

[Prior Art] Generally, in NC machine tools, particularly machining centers, the control device controls the tool handling.

The tool diameter is memorized, many types of tools are stored in each storage section of the tool magazine, and the necessary storage section is brought to the tool exchange position by a control command based on the memorized value of the tool dimensions. In step 1, the tool exchanger automatically exchanges the necessary tools in the storage section with the tools on the machine tool side. When machining a workpiece on a table while automatically exchanging tools in the tool magazine and tools in the machine tool, the dimensions of the tools used are measured and stored in the control device before machining, and the control device The correction amount was calculated based on the measured values of the dimensions to correct the addition program.

Conventionally, in order to measure and memorize tool dimensions, an L-shaped mount on which a measuring instrument such as a microscope, micrometer, or dial gauge is attached is fixed at a predetermined position on a table with mounting bolts. In this state, the tools in the tool magazine are sequentially mounted on the spindle using the tool changer, while the dimensions of the tools are measured using the measuring device, and the measured values are manually input to the control device.

[Problems to be Solved by the Invention] In the above-mentioned prior art, the measuring device is fixedly installed at a predetermined position on the table by fixing the mounting base on which the measuring device is attached to the table with a mounting bolt. ,
The tool dimensions were measured and memorized in this state, and then the workpiece was machined according to the machining program corrected based on the measured values, so the measuring instrument got in the way of machining. The space for mounting the workpiece on the table is narrowed due to the space of the mounting base.
There is a problem in that the amount of workpiece attachment is limited and machining efficiency is reduced.

In view of the above-mentioned problems, the present invention aims to provide a tool dimension measuring tool that enables machining of a workpiece with the measuring instrument removed from the table and stored in the tool magazine using a tool changer. purpose.

[Means for Solving the Problems] In order to achieve the above object, the tool dimension measuring tool of the present invention has a measuring device for measuring tool dimensions and a holder section for tool exchange arranged side by side on the upper part of the base. In addition, the base is provided with a permanent magnet.

[Function] The tool for measuring tool dimensions of the present invention is taken out from a tool magazine by a tool changer when measuring tool dimensions, carried into a table, and stored in a tool magazine for tool dimension measurement, whereby the measuring instrument Workpieces can be machined without being disturbed. Further, by disposing a permanent magnet in the base, the tool is magnetically fixed to the table.

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

FIGS. 1 and 2 show an example of the present invention, and as shown in FIGS.
A measuring instrument 3 is fixed to one side, and a holder part 4 for tool exchange is fixed to the other side of the upper part to constitute a tool dimension measuring tool 5. In addition, a contact detector 6 is provided at the top of the measuring device 3, and the holder portion 4 has a tapered shape, and a V
Pull studs 8 are provided above the flange portions 7, respectively.

Next, an example of use of the tool dimension measuring tool 5 will be described with reference to FIGS. 3 to 11.

A table 10 for NC machining I19 is provided on a bed (not shown) so as to be slidable in the X and Y directions, and a pallet 11 is provided on this table 10 so as to be replaceable. Further, a spindle head 12 is provided on the column 13 at a position above the table 10 so as to be slidable in the Z direction, that is, in the up and down direction, and a spindle 14 is rotatably provided on the spindle head 12.
A tool 15 can be attached to and detached from the main shaft 14. A known tool changer 18 having a gripping arm 17 is provided between a tool magazine 16 disposed on the side surface of the column 13 and the main shaft 14 . The tool magazine 1
Reference numeral 6 denotes a plurality of tool pots (not shown) connected in a loop shape, and these tool pots store and hold a tool 15 in which a cutting edge tool main body 15A is removably provided in the holder portion 4.

The various tools 15 stored in the tool magazine 16 are each provided with a tapered holder part 4 of the same shape attached to the main shaft 14 on the cutting edge tool body 15A, and a pull stud 8 is mounted on the upper part of the holder part 4. A V flange portion 7 that can be gripped by the gripping arm 17 is provided at the lower portion. Next, a method for measuring tool dimensions will be explained with reference to FIG.

First, the tool pot of the tool magazine 16 storing the tool 5 for measuring tool dimension is called to the exchange position as shown in FIG. Holding the flange part 7, as shown in FIGS. 6 and 7, carry the holder part 4 of the tool dimension measuring tool 5 to the position corresponding to the main spindle 14, and then press the main spindle 14.
Next, by lowering the spindle head 12, the tool 5 for measuring tool dimensions is placed on the upper surface of the pallet butt 11, as shown in FIG. 8, and the holder portion 4 is removed from the spindle 14. In this state, the tool dimension measuring tool 5 is magnetically attracted and fixed at a predetermined position on the pallet 11 by the permanent magnet 1 (step 1).

Next, the tool pot storing the tool 15 requested by the tool exchange command is called to the exchange position, and the gripping arm 17
As shown in FIG. 9, the V flange portion 7 of the tool 15
is gripped, the tool 15 is supplied to the spindle 14, and the tool 15 is mounted as shown in FIG. 10 (step 2).

Next, in step 3, the tool dimensions are measured. First, as shown in FIG. 10, the tool 15 is rotated in the opposite direction to the cutting direction and lowered, and then the table 10 is moved. A position at a predetermined height from the lower end of the cutting edge tool main body 15A is pressed against each of the four sides of the contact detector 6 that is square in plan view, and by detecting the contact, the center line Q of the contact detector 6 is determined. Align the axis of the tool 15 with Q.

Next, move the spindle head 12 to the reference position, that is, the pre-measured position.
Then, it is moved to a position at a height a from the pallet 11 that is input and stored in the control device 19.

Next, the spindle head 12 is brought close to the pallet 11 and the lower end of the cutting edge tool body 15A is brought into contact with the upper surface of the contact detector 6.
This detection signal is input to the control device 19, and in response to this signal, the workpiece I19 stops the lowering of the spindle head 12 and stores the amount of movement from the reference position. Then, based on this amount of movement, the tool length d is calculated from the distance a and the height C of the measuring instrument 3, which has been measured and stored in advance.

Thereafter, as shown in FIG. 11, the table 10 is moved to position the cutting edge tool body 15A on the side of the table 10, and then the spindle head 12 is lowered by a predetermined amount g, and the table 10 is moved to make contact. The cutting edge tool main body 15A is brought into contact with the side edge of the detector 6, and a detection signal of this contact is inputted to the control device, and this signal stops the movement of the table 10, and the amount of movement e from the center line Q is determined. Memorize 0 Then, raise the tool 15 by a predetermined distance f and place it on the table 10 again.
The contact detector 6 is moved to the outer peripheral surface of the cutting edge tool body 15A.
, and the moving distance e' of the contact detector 6 from the center line Q at this time is stored. Furthermore, the radius r of the cutting edge tool main body 15A at each contact point is determined from the movement amount e, e and the distance from the center line Q of the contact detector 6 to the side surface measured and stored in advance.
, r' are calculated, and the tool 15 is calculated based on the descending distance g, the ascending distance, and the value of 1/2 of the thickness of the contact detector 6 measured and stored in advance, that is, the semicircular curvature radius of the side edge.
The taper surface and tool radius are calculated (step 3).

In this case, if the tool 15 has a straight end shape, the tool diameter can be calculated only by measuring the moving distance e.

Next, by operating the tool changer 18, the gripping arm 17 is used to transfer the tools 1 between the tool magazine 16 and the spindle 14 one after another.
While automatically exchanging tools 15 (step 4), the above-mentioned tool dimensions are measured and stored (step 3), and when it is determined in step 5 that the tool dimensions of all used tools 15 have been completed, the process moves to step 6. However, due to the Measuring Instrument Storage Directive,
The holder part 4 is attached to the main spindle 14 by an operation opposite to the measuring instrument loading operation shown in FIGS. The control device 19 determines the amount of correction based on the tool length d and tool diameter of each tool 15 and performs a known kani program correction. The measuring device 3 and the control device 19 process the workpiece according to the machine program that has been prepared.
A cord (not shown) for connecting the two may be connected by a connector after the tool 5 is carried in, and the tool 5 may be stored after the cord is detached.

In this way, in the above embodiment, the measuring instrument 3 for measuring tool dimensions and the holder part 4 for changing tools are arranged side by side on the upper part of the base 2, and the permanent magnet 1 is arranged on the base 2 to measure the tool dimensions. When measuring and storing tool dimensions, first, the tool changer 18 is used to take out the tool dimension measuring tool 5 from the tool magazine 16 and place it on the pallet 11. In this state, the measuring device 3 is used to measure and store the dimensions of the tool 15 in use, and then the tool changer f18 is used to store the tool 5 for measuring tool dimensions in the tool magazine 16. In this case, mounting the measuring device 3 on the pallet 11 does not require any space, so a wide range of space can be obtained for mounting the workpieces, and processing efficiency can be improved.

It should be noted that the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the essential aspects of the present invention. For example, although a measuring device having a contact detector has been described, the present invention can be applied to various measuring devices, and measurement values may be input manually. Furthermore, a plurality of measuring instruments for measuring tool length and tool diameter may be fixed to the base. Further, the NC machine tool can be applied to various types, and the tool can also be applied to electrodes for electrical discharge machining.

Furthermore, the structure of the tool magazine or the method of selecting tools can be applied to various types.

[Effects of the Invention] The present invention has a measuring instrument for measuring tool dimensions and a holder section for changing tools arranged side by side on the upper part of the base, so that the measuring instrument can be removed from the table using the tool changing device. It is possible to provide a tool dimension measuring tool that enables machining of a workpiece while stored in a tool magazine and improves machining efficiency.

[Brief explanation of drawings]

1 to 11 show an embodiment of the present invention, FIG. 1 is a front view of a tool for measuring tool dimensions, FIG. 2 is a plan view of the same,
Figure 3 is a schematic explanatory diagram showing the tool dimension measurement system, Figure 4
The figure is a flowchart showing the flow of the measurement process, Figures 5 to 8 are front views showing the operation of taking out a tool for measuring tool dimensions from the tool magazine and placing it on a pallet, and Figure 9 is a front view showing the operation of changing the tool. 10 is a schematic explanatory diagram showing a tool length measuring operation, and FIG. 11 is a schematic explanatory diagram showing a tool diameter measuring operation. 1...Permanent magnet 2...Base 3...Measuring device 4...Holder portion 5...Tool dimension measurement tool Applicant Mitsubishi Metals Co., Ltd. Agent Patent attorney Mamoru Ushiki Usuda Cho Part 4 Figure 6 Figure 8

Claims (2)

[Claims] (1) A tool dimension measuring tool, characterized in that a measuring instrument for tool dimension measurement and a holder section for tool exchange are arranged side by side on the upper part of a base. (2) The tool dimension measuring tool according to claim 1, wherein the base is provided with a permanent magnet.