JPH0332554A - Automatic compensator for in-process tool - Google Patents

Abstract

PURPOSE:To reduce manday and prolong continuous unmanned operation time by displacing a tool blade tip by the minute quantity to make the position of the blade tip adjustable to a shank and providing an ATC-capable hole diameter measuring means in the proximity to the shank but in non-contact with a work. CONSTITUTION:A tool blade tip 2 provided at the tip of a shank 1 is displaced by the minute quantity to make the position of the tool blade tip adjustable to the shank 1, as well as an ATC-capable hole diameter measuring means 3 is provided in the proximity of the shank 1, but in non-contact with a work. With this constitution, the hole diameter can be measured while machining the work, and the abrasion of the tool blade tip can be measured and corrected in process. The time for arrangement and correction can be therefore shortened especially at the time of machining such a number of works as in a machining center or the like, thus reducing manday and prolonging the continuous unmanned operation time.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an automatic in-process tool correction device used when machining is performed using a machine tool or the like.

(Prior Art) Conventionally used boring bar tool cutting edge position adjustment mechanisms include a so-called ballenite system in which a cartridge having a chip is rotated relative to a unit in a manual method. As an automated version of this, there is an automatic tool correction device that adjusts the cutting edge by rotating a dial part using a separate drive unit.

On the other hand, as a dimension measuring device capable of ATC, there is a measuring device such as a touch probe having an automatic exchange mechanism.

(Problem that the invention aims to solve) However, if information on the amount of correction is provided to the automatic tool correction device, it will require man-hours or automatic measurement time to measure the dimensions, which will reduce the operating rate of the machine. Become,
On the other hand, in a dimension measuring device, since the sensor part is a contact type, the device cannot rotate during measurement, making in-process measurement impossible.

In other words, there has been no conventional machine that incorporates an automatic tool correction means and a means for measuring the workpiece hole diameter, etc., making it impossible to improve the operating rate of the processing machine.

In view of this, the present invention is designed to extend continuous unattended operation time in processing machines such as machining centers by measuring in-process errors in the cutting edge position of boring tools due to tool preset errors or wear, and automatically correcting them. The purpose of this invention is to provide an automatic in-process tool correction device.

(Means for Solving the Problem) In order to achieve the above object, claim 1 of the present invention is a boring tool such as a machining center, in which the position of the tool cutting edge can be adjusted with respect to the shank by displacing the tool cutting edge by a minute amount. Claim 2 is characterized in that a hole diameter measuring means capable of ATC is provided in the vicinity of the shank in a non-contact manner with the work. Claim 3, characterized in that the signal cable is provided with a signal cable using a slip ring to enable measurement, and is detachable from the machining center.
According to claim 1, the present invention is characterized by comprising a series of systems in which measurement of the workpiece hole diameter by the measuring means and control of an automatic tool correction device using the data are performed in-process.

(Function) With the above configuration, when machining a workpiece with a processing machine such as a machining center, the hole diameter can be measured while machining the workpiece, and wear on the tool tip can be measured and corrected in-process. It becomes possible.

(Embodiment) The present invention will be explained below with reference to the embodiment shown in FIGS. 1 to 4.

An in-process tool automatic correction device according to claim 1 of the present invention is a boring tool shank 1 of a machining center, etc., by displacing a tool cutting edge 2 provided at the tip of the shank 1 by a minute amount to adjust the tool cutting edge position to the shank 1. A hole diameter measuring means 3 is provided in the vicinity of the shank 1 and capable of ATC without contacting the workpiece. The device is equipped with a signal cable 6 using a slip ring 5 which is rotated to enable in-process measurement, and is detachable from a machining center. It consists of a series of systems that use data to control an automatic tool correction device in-process.

A female thread 7 is provided in the shank 1, and the shank 1
A female thread 9 having a pitch slightly different from that of the female thread 7 is provided in a separate tool edge holder 8 provided at the tip of the tool.

The tool cutting edge 2 is attached to the tip of the tool cutting edge holding part 8, and between the shank 1 and the outer periphery of the tool cutting edge holding part 8, a bonding material 10 of an elastic metal plate is placed between the frame and a bolt or the like. The shank 1 and the tool cutting edge holder 8 are joined together by a fastening member 11, and are integrated through this joining material 10.

A shirt 1-12 is provided in the shank 1 so as to be rotatable in the longitudinal direction via bearings 13, 13, and the shaft 12 has a shirt 1-12 in the middle part close to one end 1a of the shank 1. The male screw 14 that is screwed into the provided female screw 7 approaches the tip portion 12a and the female screw 9 of the tool edge holding portion 8
A male thread 15 is provided to be screwed into each of the two, and the pitch between the female thread 7 and the male thread 14 is slightly different from the pitch between the female thread 9 and the male thread 15.

Further, on the side where the shank l and the tool edge holding part 8 face each other, a spring 16 is biased so that the two are spaced apart from each other by the shaft 1.
It is provided in the direction of the outer circumference of 2.

The other end 12b side of the shaft 12 is formed into a gear 17 having a plurality of teeth on its outer periphery.
A gear 18 that meshes with the shank 1 is fixed to (or may be integral with) a small shaft 19 provided on the outer peripheral side of the shank 1 and parallel to the shaft 12. The small shaft 19 is rotatably supported by bearings 20 and 20, and is tl-shaped so that the small shaft 19 drives the gear 17 via the gear 18.

The other end of the shank 1 is fixed to a machining center (not shown), so that the tool cutting edge 2 can machine a workpiece.

Further, the rotation of the small shaft 19 uses the rotation of the U axis on the machining center side as a driving source.

The hole diameter measuring means 3 includes a non-contact sensor section 4 provided close to the tool cutting edge 2, a signal cable 6, a slip ring 5, a connector 21, etc., and the connector 21 is connected to the processing machine side to which the shank 1 is attached. chuck 24
The tool is attached together with a positioning block 23 for positioning the tool in terms of rotational direction, etc.

The power source for the sensor section 4 is connected to the power source of a processing machine such as a machining center via a connector 21 via a signal cable 6.

Therefore, when the connector 21 is attached or detached, the power to the sensor section 4 is interrupted.

Next, the operation will be explained.

First, connect the signal cable 6 to the shank 1 through the slip ring 5.
Next, the sensor section 4 at the tip is brought close to the tool cutting edge 2 and set in a non-contact state with the workpiece 22, and the connector 21 is attached to the positioning block 23 of the chuck 24.
After positioning the tool in the rotational direction, the chuck 24 is connected to the power source. This allows the hole diameter of the workpiece to be determined by the sensor section 4.
The electrical signal detected by the chuck 2 is transmitted via the connector 21.
This creates a system in which the information can be transmitted to the 4th side and measured.

For example, if the tool cutting edge 2 needs to be corrected in the direction of diameter expansion due to a tool preset error or wear during machining, the small shaft 19 is rotated by the U axis of the machining center when viewed from the machining center side. When rotated clockwise, the gear 18 rotates counterclockwise and the gear 17 of the shaft 12 that meshes with it rotates clockwise, so that the shaft 12 is rotated clockwise within the shank 1 via the bearing 13.1B. However, since the male thread 14 of the shaft 12 is threadedly engaged with the female thread 7 in the shank 1, and these threads are formed as right-hand threads, the shaft 12 moves to the left in FIG. However, the male thread 15 of the shirt 1-12 and the female thread 9 of the tool cutting edge holder 8 are screwed together.
Since the pitch of the male thread 14 and the female thread 7 that are screwed together is smaller than that of the male thread 14 and the female thread 7, the tool edge holder 8 moves in the direction away from the shank 1 by the difference, but the tool edge holder 8 moves in the direction away from the shank 1. Since the tool 8 is fixed at one point on its circumference by an elastic binding material 10, the screws 7 and i4 and 9 and 15 are fixed in the A direction in FIG. The cutting diameter by the tool cutting edge 2 is expanded. In this case, the amount of displacement is the pitch between the male thread 14 and the female thread 7, and the pitch between the male thread 15 and the female thread 9.
Various adjustments can be made by appropriately selecting the minute differences between the bits and sevens. Spring 16 is provided to absorb screw backlash.

Further, in FIG. 1, if the small shaft 19 is rotated clockwise when viewed from the machining center side, the tool operates in the opposite direction, and the tool cutting edge 2 rotates in the direction B, thereby reducing the cutting diameter.

Furthermore, when the pitch between the female thread 7 and the male thread 14 is made smaller than the pitch between the female thread 9 and the male thread 15, if the small shaft 19 is rotated in the opposite direction, the cutting edge 2 will rotate in the A direction and the B direction as described above. Of course you can.

In addition, even if the female thread 7 and the male thread 14 and the female thread 9 and the male thread 15 are left-handed threads or have opposite threads, the tool cutting edge 2 can be moved by a predetermined amount by rotating the small shaft 19 in a predetermined direction by a predetermined amount. It is also possible to adjust.

A series of systems like this makes it possible to measure the hole diameter of a workpiece and control automatic tool correction using that data in-process.

(Effects of the invention) As explained above, this invention makes it possible to measure and correct tool preset errors and tool wear in-process during machining on the machining center side, thereby reducing setup time and Since the correction time can be shortened, continuous unmanned operation time can be extended by reducing man-hours.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an embodiment of the automatic tool correction means of the present invention provided in the shank, and Fig. 2 is a sectional view showing an embodiment of the measuring means of the invention provided in the shank of Fig. 1. 3 is a side view of another embodiment in which the sensor section shown in FIG. 2 is provided on the back side of the tool cutting edge position, and FIG. 4 is a sectional view showing the positional relationship of the sensor section shown in FIG. 2 with the workpiece. be. 1...Shank, 1a...Tip, 1b...Other end,
2... Tool cutting edge, 3... Measuring means, 4... Sensor part, 5... Slip ring, 6... Signal cable,
7... Female thread, 8... Tool cutting edge holder, 9... Female thread, 10... Binding material, 11... Fastening member, 12...
...Shaft, 12a...Tip, 12b...Other end, 13...Bearing, 14.15...Male thread, 16...
・Spring, 17.18... Gear, 19... Small shaft, 20... Bearing, 21... Connector, 22... Work, 23... Positioning block, 24... Chuck.

Claims (1)

[Claims] 1) In a boring tool such as a machining center, the position of the tool tip can be adjusted with respect to the shank by displacing the tool tip by a minute amount, and the tool can be placed close to the shank without contacting the workpiece. An in-process tool automatic correction device characterized by being provided with a hole diameter measuring means capable of ATC. 2) The in-process tool according to claim 1, wherein the measuring means includes a signal cable using a slip ring for rotating the sensor section to enable in-process measurement, and is detachable from the machining center. Automatic correction device. 3) The in-process tool according to claim 1, comprising a series of systems that measure the workpiece hole diameter by the measuring means and control an automatic tool correction device using the data in-process. Automatic correction device.