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Numerical control device and control method of numerical control device

A technology of numerical control device and control method, applied in digital control, program control, electrical program control, etc., which can solve the problems of connection position deviation, machine tool key and keyway collision, etc.

Pending Publication Date: 2021-08-24
BROTHER KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, there is a possibility that the machine tool generates an impact force where the key collides with the keyway, and the connection position between the output shaft of the spindle motor and the spindle is shifted due to the impact force.

Method used

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  • Numerical control device and control method of numerical control device
  • Numerical control device and control method of numerical control device
  • Numerical control device and control method of numerical control device

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Embodiment Construction

[0023] Embodiments of the present invention will be described. Left and right, front and rear, and up and down indicated by arrows in the drawings are used in the following description. The left-right direction of the machine tool 1 is the X-axis direction of the machine tool 1 , the front-back direction of the machine tool 1 is the Y-axis direction of the machine tool 1 , and the up-down direction of the machine tool 1 is the Z-axis direction of the machine tool 1 . figure 1 The illustrated machine tool 1 rotates a tool 4 mounted on a spindle 9 to perform cutting processing on a cutting object 3 held on an upper surface of a table 13 .

[0024] refer to figure 1 and figure 2 , the structure of the machine tool 1 will be described. The machine tool 1 has a base 2, a column 5, a spindle head 7, a spindle 9, a table device 10, a tool changer 20, a control box 6 and an operation panel 15 (refer to Figure 4 )Wait. The base 2 has a substantially rectangular parallelepiped sh...

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Abstract

The invention relates to a numerical control device and a control method of the numerical control device. The CPU calculates an output torque generated by the spindle motor based on a current supplied to the spindle motor when the spindle motor drives the spindle. When the spindle motor drives the spindle, the CPU calculates the acceleration of the spindle motor on the basis of an encoder provided to the spindle motor. The CPU calculates an estimated tool inertia Jm on the basis of the calculated output torque and the calculated acceleration. And the CPU judges whether the calculated estimated cutter inertia Jm exceeds a threshold value Th or not. The CPU notifies an error when it is determined that the estimated tool inertia Jm exceeds the threshold Th.

Description

technical field [0001] The invention relates to a numerical control device and a control method of the numerical control device. Background technique [0002] The machine tool described in Japanese Patent Publication No. 205891 of 2018 has a spindle head, a spindle motor, a shaft coupling, an assembly hole, a tool handle and a tool handle clamping portion. The spindle head internally supports the spindle in a rotatable manner, and a spindle motor is provided on the spindle head, and the spindle motor rotates the spindle. The coupling connects the output shaft of the spindle motor to the spindle. The spindle has keys at prescribed positions in and around the mounting holes. The shank is provided with a key groove capable of engaging with the key when the shank is fitted to the tapered portion of the mounting hole. The handle is fitted to the tapered portion of the fitting hole. The knife handle clamping part is arranged above the assembly hole, and the knife handle clampi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/19
CPCG05B19/19G05B2219/35349
Inventor 服部将文小林太树
Owner BROTHER KOGYO KK
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