JPS62102953A - Breakage detecting device for butt cutting tool - Google Patents

Abstract

PURPOSE:To detect the breakage of a tool concurrently with the feed of a material to the machining area and shorten the cycle time by providing a detecting means in parallel with a holder on the protrusion side of the material held by the holder to the machining area. CONSTITUTION:The extraction operation of a material to a machining area is performed for each cycle of a machine, and during the butt machining by a butt cutting tool 13 performing the final process of a work in this operation process, there may be such a case that the butt cutting tool 13 is broken and the work is not cut off from the raw material. During the extraction process of this material to the machining area, when a holder 12 enters from the side direction of the material by the advance of an X-axis tool slide 5, the material hits a limit switch 14 to energize the start ON contact before the material is held by the holder 12, thereby a signal is transmitted to an NC unit, and an operation stop command is sent to the control section of the tool slide 5. Accordingly, it is unnecessary to incorporate the breakage process of individual tools in the cycle time, thus the cycle time can be shortened, the structure can be simplified, and the cost can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) Kiitoaki relates to a breakage detection device for LJJ rebiting during cutting off of long strips.

(Prior art) In turning work, in which material is supplied sequentially from the back of the spindle to the machining area (this area) and the product is turned continuously, during the final turning (LJJ) work, G is A thin parting tool with a width different from the turning tool used in the turning process is used.
I can stay. As the protrusion IJJ rebit approaches the center of the workpiece, the protrusion 5J] due to the difference in rotation between the spindle and the workpiece
The workpiece is cut off from the material with a boss or burr left by performing one rotation at the front with a t'1'' swing, but if the longitudinal dimension of the workpiece is long, the centrifugal force may cause the workpiece to be cut out from the workpiece. Shaking it too much may damage the parting tool blade. If the parting tool is damaged and the workpiece is not cut off and the tool moves from the parting end face, the tool and the workpiece will interfere in the next process, leading to an unexpected accident. Conventionally, a tool breakage detection device has been used that detects and confirms breakage of the twisted pair tool before or after the fact and automatically stops the machine.

However, in cases where humans always see machines as only beneficial, aggressive force is not currently used due to economic problems. Simple and inexpensive one-type touch sensors have been popular for a long time, but there is a trend toward shorter cycle times (in this case, the process of detecting tool breakage may lengthen the cycle time by 1").

(Problems to be Solved by the Invention) It is an object of the present invention to eliminate such problems and provide a tool breakage detection device that is inexpensive and is not constrained by cycle tights.

(Example) The present invention will be explained below based on one embodiment.

1 is a numerically controlled lathe, and 2 is a main shaft that holds a long material via a chuck 3. Reference numeral 4 supports the material with a material delivery pipe placed behind the main shaft 2. 5 is the direction of the spindle rotation axis (Z)
8 is a Z-axis tool feeder that can be moved via a servo motor 6 and a ball screw 7; The X-axis tool feeder 11 is indexable around the Z-axis by a turret that is a tool support member mounted on the X-axis tool feeder 8''. I2 is a gripping tool consisting of a pair of material claws 12b that vertically sandwich a split portion 12a extending in the radial direction of the material and protrudes in the radial direction of the material so as to be given an elastic action. The material protruding from the chuck 3 is grasped in the radial direction by the relative feeding motion of the table 8, and is pulled out from the chuck 3 into the processing area by the relative feeding motion of the Z-axis tool feed table 5. The gripping claws 1 in the radial direction of the material of the gripping tool 12
Regarding the grasping operation means 2b, it is not limited to the one using the elastic action shown in the embodiment, but various other methods such as cam or fluid control can be considered. 13 is Taret) IIJ=
-G held parting tool, 14 is the above-mentioned gripping tool I2
A detection means such as a limit switch or a proximity switch fixed to the protruding side of the material gripped by the gripper 12 in parallel with the gripping tool 12 detects whether the cutting tool 13 is damaged when cutting off the material and the workpiece is cut off. It is activated to detect the presence or absence of a workpiece when there is no workpiece. The detection means I4 communicates with the turret shaft via a conductive wire I5, is led to the outside, and is connected to a numerical control device to issue a workpiece presence command to the control section of the tool feeder and stop the operation of the machine. Material in long length.

Next, the present invention will be explained in detail.

The material in the spindle 2 is processed by the relative feeding motion of the X-axis tool feeder 5 and the Z-axis tool feeder 8, but the material is not supplied to the processing area until after the workpiece has been cut off. Through the feeding operations of the X-axis engineer feeder 5 and the Z-axis tool feeder 8, the gripper f1-12 enters the material protruding from the chuck 3 from the lateral direction and grips the outer diameter of the material, and the chuck 3
When the gripper 12 is released, the gripping tool 12 moves in the direction of the spindle rotation axis.
By moving in a direction away from the puller 3, the material is pulled out into the processing area. The above operation is performed every cycle of the machine, and during this operation process, the cut-off bit 13, which is the final process of the workpiece, breaks the cut-off IJJ rebit 13 and the workpiece is cut off from the material. If not, in the second step of withdrawing the above material to the processing area,
The front limb of the X-axis tool feeder 5 (Thus, when the gripping tool 12 enters the material from the side, the material comes into contact with the limit switch! 4 and turns on before the material is gripped by the gripping tool 12. This causes the signal to be transmitted to the numerical control device, which issues a command to the control unit of the tool feeder to stop operation.4!
:It is.

From the following 1-, in the present invention, it is possible to synchronously detect damage to the tool in parallel with the supply of material to the processing area.
Therefore, it is not necessary to incorporate individual damage processes into the cycle time, and it is possible to shorten the cycle time and provide an inexpensive device with a simple structure.

[Brief explanation of drawings]

Fig. 1 is a diagram showing an embodiment of the present invention, Fig. 2 is an embodiment of a gripping tool for pulling out material into a processing area, and Fig. 3 is a detection means fixed on a turret in parallel with the gripping tool. .

Claims (1)

[Claims] Damage to a parting tool characterized in that a detection means is fixed to the protruding side of the material gripped by a gripper that enters from the side of the material, grips the material, and pulls it out to the processing area, in parallel with the gripper. Detection device.