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Temperature monitoring device for CNC lathe based on thermodynamic law

A technology of numerically controlled lathes and monitoring devices, which is applied in temperature control using digital devices, temperature control, and temperature control using electric methods, and can solve problems such as high cost, lagging temperature monitoring, and limited effects

Inactive Publication Date: 2019-03-15
YANCHENG XUNWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional temperature monitoring methods cannot find key temperature information in time, which leads to problems such as lag, instability, and low precision of temperature monitoring. Conventional thermal deformation control methods such as automatic thermal deformation compensation methods often have high costs, poor stability, and limited effects.

Method used

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  • Temperature monitoring device for CNC lathe based on thermodynamic law
  • Temperature monitoring device for CNC lathe based on thermodynamic law
  • Temperature monitoring device for CNC lathe based on thermodynamic law

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 , figure 2 , image 3 , Figure 4 As shown, a CNC lathe 100 according to an embodiment of the present invention includes an electric spindle 110 , a tool system 120 , a PLC system 130 , a multi-jaw chuck 140 , an electric spindle base 150 , and an electric control cabinet assembly 160 .

[0030] The electric spindle 110 includes an electric spindle motor 111 and an electric spindle driver 112 .

[0031] The tool system 120 includes a tool holder 121 , a tool handle 122 and a tool tip 123 .

[0032] The electric spindle base 150 includes an electric spindle base body 151 .

[0033] The electric control cabinet assembly 160 includes the hardware parts of the main electric control system of the CNC lathe 110, such as the hardware parts involved in the motor driver, controller, PLC system 130, etc., as well as other hardware parts such as related cables and converters. part. The electric control cabinet assembly 160 also includes an electric control ...

Embodiment 2

[0091] The difference from Embodiment 1 is that the temperature control device 260 of this embodiment includes two cold air control devices 261, one cold air control device 261 controls the temperature of the electric spindle motor 111, and one cold air control device 261 controls the temperature of the knife tip 123 . The cold air regulating device 261 for temperature regulation of the knife tip 123 includes an air nozzle facing the knife point 123, and the cold air regulating device 261 for temperature regulating the electric spindle motor 111 includes a air nozzle facing the ventilation filter 152 gas mouth. The low-temperature cold air can directly cool down the part to be regulated through the air nozzle.

[0092] In order to save cost, the two cold air regulating devices 261 share one cold air generating device.

[0093] The cold air regulating device 261 for temperature regulation of the knife tip 123 also includes a gas pipe, and the gas pipe and the platinum-rhodium...

Embodiment 3

[0095] The difference from Embodiment 1 is that the temperature control device 260 of this embodiment includes two cold water control devices 262, one cold water control device 262 controls the temperature of the electric spindle motor 111, and one cold water control device 262 controls the temperature of the knife tip 123 .

[0096] The cold water regulating device 262 for regulating the temperature of the knife tip 123 is the same as that in Embodiment 1.

[0097] The cooling water control device 262 for temperature control of the electric spindle motor 111 includes several cooling water passages, each cooling water passage is close to the stator winding of the electric spindle motor 111 with a higher temperature rise and can cool the electric spindle motor 111 in temperature. At this time, the electric spindle base 150 does not need to be provided with the electric spindle base body 151, the ventilation filter 152, the air duct 153, etc., and only needs to provide the throu...

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PUM

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Abstract

A temperature monitoring device (200) employing thermodynamic principles for a computer numerical control lathe (100). A temperature monitoring thermistor (211) is located at a portion experiencing the highest temperature rise in a stator of an electric spindle motor (111), wherein said highest temperature rise portion does not spatially interfere with the other components in the stator. Temperature protection thermistors (212) are connected in series, there being as many thermistors as there are phases of the electric spindle motor (111). Each temperature protection thermistor (212) is attached at a highest temperature rise portion of coil experiencing the highest temperature rise in a winding of each phase. A cutter temperature sensor (220) comprises three platinum-rhodium wire temperature sensor groups (221). A measurement head of each platinum-rhodium wire temperature sensor group (221) is disposed on an outer surface of a cutter tip (123), and is spaced apart from a machining portion of the cutter tip (123). A temperature regulation module (260) comprises a cold air regulation device (261) and a cold water regulation device (262). The temperature of a portion to be regulated is decreased via low-temperature cold air of the cold air regulation device (261) or low-temperature cold water of the cold water regulation device (262). The temperature monitoring device (200) of the numerical control lathe (100) accurately monitors the temperature of a key portion of the numerical control lathe (100) in a timely manner, and reduces the impact of temperature rise and thermal deformation reliably and effectively with low costs.

Description

technical field [0001] The invention relates to the technical field of temperature monitoring of a numerically controlled lathe, in particular to a temperature monitoring and controlling device for a high-precision numerically controlled lathe. Background technique [0002] CNC lathe is a precision manufacturing equipment with high precision, high automation and high flexibility. With the rapid development of CNC lathes and related manufacturing technologies, metal turning has put forward higher requirements for the accuracy and precision stability of CNC lathes. In precision turning, the manufacturing error caused by thermal deformation of CNC lathe accounts for 40% to 70% of the total error. In CNC lathes, the main factors affecting the thermal deformation of the lathe are the thermal deformation of the electric spindle and the thermal deformation of the tool. Electric spindles and cutting tools are important components of CNC lathes. The thermal deformation of electric ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/4065G05D23/24
CPCG05B19/4065G05B2219/37431G05D23/1917G05D23/24
Inventor 陈羽笛陈建楼黄彬彬
Owner YANCHENG XUNWEI TECH CO LTD