Milling system and method under different lubrication conditions

Patent metadata

Field	Value
Publication number	US-11766753-B2
Application number	US-202117468668-A
Country	US
Kind code	B2
Filing date	Sep 7, 2021
Priority date	Nov 22, 2018
Publication date	Sep 26, 2023
Grant date	Sep 26, 2023

Abstract

The disclosure provides a milling system and method under different lubrication conditions. The system uses a tool to mill the workpiece, a force measuring system to measure the milling force, a tool change system to replace the tools, a tool storage to store the tools. It can store the tools, provide the lubricating oil to the milling surface, select different tools according to different processing conditions, select the best angle differences of the unequal spiral angle tools according to different conditions comprising dry cutting, casting-type lubrication, minimal quantities of lubrication or minimal quantities of nanofluid lubrication, and/or choose the optimal tool according to different cutting parameters in order to obtain the minimum milling force.

First claim

We claim:

1. A method for operating a milling system that comprises a lubrication system, a tool storage, a tool change system, a cutting system, and a force measuring system, wherein:
the lubrication system provides lubricating oil to the cutting system, the lubrication system having a power source in the form of high-pressure gas, an input frequency and a volume of the high-pressure gas can be controlled through a frequency generator and a gas volume control knob, a quantity of the lubricating oil in a lubrication pump can be adjusted accordingly, then the lubricating oil can be provided to the cutting system through a nozzle interface in connection with an outlet interface of the lubrication pump;
the tool storage comprises a storage magazine on which a plurality of cutter assemblies are circumferentially distributed, each cutter assembly of the plurality of cutter assemblies comprising a respective mandrel and a respective cutter which is connected at a first end of the associated mandrel, and helical angles of the cutters of multiple ones of the plurality of cutter assemblies are not identical, the cutter which is matched with an operating condition can be faced to the tool change system through the rotation of the storage magazine;
the tool change system comprises two mechanical arms facing opposite directions, and a rotating shaft is provided at the middle of the two mechanical arms, the positions of the two mechanical arms can be switched by controlling the rotation of the rotating shaft, and thus the cutter assembly change between the cutting system and the tool storage is realized through switching of the positions of the two mechanism arms;
the cutting system comprises a spindle having arranged thereon a given cutter assembly of the plurality of cutter assemblies, and rotation of the given cuter assembly arranged on the spindle is driven by controlling rotation of the associated mandrel to which the cutter arranged on the associated mandrel is connected, wherein cutting is achieved through rotation of the cutter;
the force measuring system is arranged at a first end of the cutting system, and is used to measure a cutting force received by a workpiece fixed thereon, so a cutter with non-identical helical angles can be chosen for milling according to the machining parameters; and
the lubrication system further comprises an inlet interface, a gas source processor, the lubrication pump, a nozzle and connection pipelines, and controlling valves arranged at various ones of the connection pipelines, the inlet interface is fixed on the gas source processor, the high-pressure gas entering through the inlet interface is filtered by the gas source processor and then provided to the lubrication system, an electromagnetic valve is fixed on the gas source processor through a two-way joint to control the entrance of the high-pressure gas, a three-way valve is connected with an outlet of the electromagnetic valve, the high-pressure gas enters the frequency generator through an outlet pipeline of the three-way valve, and the input frequency of the high-pressure gas can be controlled by the frequency generator, the high-pressure gas coming out of the frequency generator enters the lubrication pump through the connection pipelines, then the lubricating oil can be provided to the cutting system through the nozzle interface in connection with the outlet interface of lubrication pump,
wherein the method for operating the milling system comprises choosing, among the plurality of cutter assemblies, a specific cutter assembly of which the non-identical helical angles of the cutter exhibit an angle difference that suits to a specific condition of multiple different conditions including dry cutting, casting-type lubrication, minimal quantities of lubrication or minimal quantities of nanofluid lubrication, and/or choosing, among the plurality of cutter assemblies, a specific cutter assembly of which the cutter is optimal for a specific cutting parameter of multiple different cutting parameters, in order to obtain a minimum cutting force applied to a workpiece by the cutter of the specific cutter assembly chosen among the plurality of cutter assemblies.

2. The method for operating the milling system according to claim 1 , wherein the high-pressure gas enters the lubrication pump through another outlet pipeline of the three-way valve, an oil cup is connected through threaded connection at one end and connected to a fixing cover of the lubrication pump through threaded connection at the other end, the fixing cover of the lubrication pump fixed on a box body is connected with the lubrication pump, the volume of the high-pressure gas can be adjusted through the gas volume control knob, and the quantity of the lubricating oil can be adjusted through an oil quantity control knob.

3. The method for operating the milling system according to claim 1 , wherein the tool change system comprises a motor, the rotating shaft and at least the two mechanical arms, the motor drives the rotating shaft to rotate, the two mechanical arms are located at the outer circumference of the rotating shaft and facing opposite directions, one is facing at the tool storage, and the other is facing at the cutting system, the positions of the two mechanical arms can be switched by controlling the rotation of the rotating shaft.

4. The method for operating the milling system according to claim 1 , wherein the force measuring system comprises a workbench, a workpiece holder and a measuring element, the workbench is placed right under the cutting system, the workpiece holder is fixed on the workbench, the workpiece with a degree of freedom can be completely fixed by the workpiece holder and the workbench, the measuring element can collect the cutting force received by the workpiece, the measured signal is amplified by an amplifier and then delivered to a force information collection device, in the end, the magnitude of the cutting force can be displayed on a computer.

5. The method for operating the milling system according to claim 4 , wherein the workpiece holder comprises an X-axis direction clamping element, a Y-axis direction clamping element, and a Z-axis direction clamping element, wherein the X-axis direction clamping element includes a plurality of positioning screws, the Y-axis direction clamping element includes fastening screws and a positioning block, one face of the positioning block contacts with a side face of the workpiece, another face of the positioning block contacts with the fastening screws, and the positioning block can be tightened when the plurality of fastening screws are tightened; the Z-axis direction clamping element includes a plurality of clamping plates, each of which is a self-adjusting clamping plate, and in order to meet a requirement for change in size of the workpiece, the workpiece holder can be adjusted according to the size of the workpiece through adjustment of the X-axis direction, the Y-axis direction, and the Z-axis direction clamping elements.

6. The method for operating the milling system according to claim 1 , wherein the cutter of at least one of the plurality of cutter assemblies has helical angles that are identical, the method further comprising: choosing, among the plurality of cutter assemblies, a specific cutter assembly of which the cutter has identical helical angles such that a diameter and an axial cutting depth of the cutter exhibit a minimum cutting force applied to a workpiece.

Assignees

• Univ Qingdao Technology
• Univ Chongqing
• Shanghai Jinzhao Energy Saving Tech Co Ltd

Inventors

• Li Changhe
• Yin Qingan
• Zhang Yanbin
• Cao Huajun
• Duan Zhenjing
• Mao Cong
• Ding Wenfeng
• Zhang Naiqing
• Dong Lan
• Bai Xiufang
• Sui Menghua
• Liu Yonghong
• Wu Wentao
• Gao Teng
• Yang Min
• Jia dongzhou
• Li Runze
• Hou Yali

Classifications

• B23Q3/15503 Primary

  Processes characterized by special sequencing of operations or the like, e.g. for optimizing tool changing time or capacity in tool storage · CPC title

• B23C1/06 Primary

  with one vertical working-spindle · CPC title

• B23Q3/15713

  a transfer device taking a single tool from a storage device and inserting it in a spindle (B23Q3/15793 takes precedence) · CPC title

• B23Q3/15722

  Rotary discs or drums · CPC title

• B23Q11/1046

  using a minimal quantity of lubricant (spraying apparatus using a carrying fluid B05B7/00) · CPC title