CN105619177B - Machine tool chief axis folder bits warning device and method based on strain pressure transducer - Google Patents

Machine tool chief axis folder bits warning device and method based on strain pressure transducer Download PDF

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Publication number
CN105619177B
CN105619177B CN201610190840.8A CN201610190840A CN105619177B CN 105619177 B CN105619177 B CN 105619177B CN 201610190840 A CN201610190840 A CN 201610190840A CN 105619177 B CN105619177 B CN 105619177B
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China
Prior art keywords
blind rivet
sensor
chuck
machine tool
warning device
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Expired - Fee Related
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CN201610190840.8A
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Chinese (zh)
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CN105619177A (en
Inventor
李晖
李焕军
王立博
黄明浩
白鹤康
项兆龙
李政泽
张锐玺
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Northeastern University China
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Northeastern University China
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Priority to CN201610190840.8A priority Critical patent/CN105619177B/en
Publication of CN105619177A publication Critical patent/CN105619177A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q17/00Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/007Arrangements for observing, indicating or measuring on machine tools for managing machine functions not concerning the tool
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/0078Safety devices protecting the operator, e.g. against accident or noise
    • B23Q11/0089Safety devices protecting the operator, e.g. against accident or noise actuating operator protecting means, e.g. closing a cover element, producing an alarm signal

Abstract

The present invention is a kind of machine tool chief axis folder bits warning device, built-in type method is employed to be assembled into inside cutter hub wireless pressure sensor, handle of a knife and the relation of main shaft faying face folder bits size are converted into by the change of handle of a knife upper grip compression weight, and transmission of wireless signals with being timed monitoring to milling machine processing by way of receiving.The structure of the present invention includes standard cartridge;Blind rivet connector is installed in the countersunk head hole seat of chuck upper end;There is counter sink on blind rivet connector, pressure sensor is installed in each counter sink;The blind rivet connector is fixed by sensor pressing plate with chuck;The Kong Bingyong holding screws of blind rivet through sensor pressing plate and blind rivet connector are fixed, and each sensor is connected by wireless signal with computer.

Description

Machine tool chief axis folder bits warning device and method based on strain pressure transducer
Technical field
The invention belongs to detection technique field, and in particular to a kind of machine tool chief axis folder based on contactless pressure sensor Consider warning device and method to be worth doing.
Background technology
Digit Control Machine Tool is manufacturing machine-tool, and milling machine is the first important official of Digit Control Machine Tool.Milling machine can process plane, Groove, tooth part, particularly helical surface and various curved surfaces is divided to have its unique advantage.To processing Aeronautics and Astronautics, ship, The manufacturing industry such as automobile and mould, it is required for the tool of production that high-grade, digitally controlled machine tools are important as its.Efficiently, accurate, reliable, intelligence It is the Main Trends of The Development of CNC milling machine, however, CNC milling machine misaligns phenomenon and control due to cutter caused by main shaft folder bits One of very important problem that always countries in the world machine tool industry faces.With the requirement to high-precision part, machining accuracy Develop via grade, micron order to submicron order, even nanoscale, in high-precision process, main shaft folder bits cause Cutter misalign and can have a strong impact on part crudy.And the position of main shaft folder bits is mainly at two:First, in handle of a knife upper table In gap between face and main shaft lower surface(Such as Fig. 3), second, on the conical surface that main shaft and handle of a knife contact(Such as Fig. 4).In practice Understand:Folder bits position produces folder bits failure and all occurred in milling machine exchanging knives process at the above two.Therefore main shaft mistake is loaded onto in advance in handle of a knife Control and early warning main shaft folder bits failure, are to avoid main shaft folder bits from causing handle of a knife to misalign the weight influenceed on part crudy in journey Want approach.
At present, the traditional detection method of machine tool is contact type measurement method.Although contact type measurement technology is determined in workpiece Position and setting coordinate, the physical dimension of measurement part and three-dimensional appearance, cutter parameters, tool wear monitoring etc. have certain Application, but unbalance stress also be present, time of measuring length, measurement point spatial resolution is not high enough, can not measure soft object etc. Birth defect.Simultaneously as being influenceed by centrifugal force, touch sensor is in fields such as the rotation of machine tool chief axis high speed, machinings The application of conjunction is also very restricted.
For Digit Control Machine Tool, main shaft folder bits alarm and control based on non-contact pressure sensor, its technology hardly possible are realized Point is:(1)How wireless pressure sensor is installed on CNC milling machine;(2)How pressure sensor measured value and master are established The relation of axle clamp bits;(3)Detection data how to be transmitted and transmission path;(4)How remotely to monitor and control.
Show through practical operation experience and research:The main reason for handle of a knife of milling machine in process of production misaligns is tool changing When main shaft folder bits.Wireless pressure sensor is assembled into inside cutter hub present invention employs built-in type method, by being pressed from both sides on handle of a knife The change of head compression weight is converted into handle of a knife and the relation of main shaft faying face folder bits size, and by transmission of wireless signals with receiving Mode to milling machine processing be timed monitoring.
The content of the invention
Goal of the invention:It is an object of the invention to solve wireless pressure sensor present in prior art to be difficult to attach to On CNC milling machine;It is difficult to set up the relation of pressure sensor measured value and main shaft folder bits;Detection data are not easy to transmit and transmit road Footpath susceptible;The problems such as can not remotely monitoring with control.
Technical scheme:
A kind of machine tool chief axis folder bits warning device based on strain pressure transducer, it is characterised in that:Including chuck;Institute State in the countersunk head hole seat of chuck upper end and blind rivet connector is installed;There is counter sink on the blind rivet connector, pacify in each counter sink Equipped with pressure sensor;The blind rivet connector is fixed by sensor pressing plate with chuck;Blind rivet is through sensor pressing plate with drawing The Kong Bingyong holding screws of nail connector are fixed.
The described folder bits warning device of the machine tool chief axis based on strain pressure transducer, it is characterised in that:The pressure Sensor is with addition of wireless blue tooth module;The pressure sensor is outer with addition of positioning shell.
The described folder bits warning device of the machine tool chief axis based on strain pressure transducer, it is characterised in that:The chuck The circumference uniform distribution stepped hole that the with good grounds sensor pressing plate in upper surface manufactures;The bottom of chuck is provided with signal transmission hole.
The described folder bits warning device of the machine tool chief axis based on strain pressure transducer, it is characterised in that:The chuck The cylindricity of the countersunk head hole seat of upper installation blind rivet connector is in φ 0.01mm.
The described folder bits warning device of the machine tool chief axis based on strain pressure transducer, it is characterised in that:The blind rivet Counter sink on connector is the counter sink of circumference uniform distribution, and each hole axle is no more than 0.01mm, each counter sink side to depth difference The leaded groove in face.
The described folder bits warning device of the machine tool chief axis based on strain pressure transducer, it is characterised in that:The chuck Upper surface and spot-facing surface roughness reach more than Ra1.6, and flatness is no more than 0.02mm.
The described folder bits warning device of the machine tool chief axis based on strain pressure transducer, it is characterised in that:Sensor pressure Plate has 0.03- without end-play, sensor pressing plate endoporus between blind rivet shaft shoulder lower surface and sensor upper surface with blind rivet 0.05mm sideshake.
The application method of machine tool chief axis based on strain pressure transducer folder bits warning device described above, its feature It is:Comprise the following steps:
Step 1:The computer that signal is received and handled is connected, starts sensor, by adjusting axial location, it is determined that passing The flexible stress of sensor, and make it that each sensor reading is consistent;
Step 2:Handle of a knife is preloaded onto on vertical numerical control milling machine, sets overproof threshold value △ g, static and operation is in main shaft During two states, any synchronization pressure sensor numerical value all meets Gmax-Gmin≤△ g, completes to knife process;
Step 3:During following process, the synchronization pressure sensor readings after each tool changing, if Gmax- Gmin > △ g, system automatic alarm;If Gmax-Gmin≤△ g, it can continue to process.
Advantage and effect:The present invention is compared with plain-milling machine is processed, and main shaft presss from both sides when can quickly predict main shaft and handle of a knife assembling Bits and other handle of a knifes misalign problem, avoid the bad abrasion of milling machine spindle system in process, or even damage, extend Milling machine life-span, improve machining accuracy.
Brief description of the drawings:
Fig. 1 is assembling schematic diagram of the present invention;
Fig. 2 is Fig. 1 a partial views;
Fig. 3 is handle of a knife upper surface and main shaft folder bits schematic diagram;
Fig. 4 is that handle of a knife contacts conical surface folder bits schematic diagram with main shaft;
Fig. 5 is standard BT40-ER-100 handle of a knifes chuck transformation schematic diagram;
Fig. 6 is the improved blind rivet schematic diagram of the present invention;
Fig. 7 is inventive sensor pressure plate structure schematic diagram;
Fig. 8 is Fig. 7 M direction views;
Fig. 9 is blind rivet connector schematic diagram of the present invention;
Figure 10 is wireless pressure sensor schematic diagram of the present invention;
Figure 11 is wireless pressure sensor operation principle schematic diagram of the present invention;
In figure:1- main shafts, 2- pressure sensor fairleads, 3- chucks, 4- signal sprocket holes, 5- blind rivets, 6- sensor pressures Plate, 7- cover plate holding screws, 8- sensors, 9- blind rivet connectors, 10- holding screws.
Embodiment:
The present invention is a kind of machine tool chief axis folder bits warning device, and its technological thought is to employ built-in type method wireless pressure Force snesor is assembled into inside cutter hub, and be converted into handle of a knife by the change of handle of a knife upper grip compression weight considers to be worth doing with main shaft faying face folder The relation of size, and transmission of wireless signals with being timed monitoring to milling machine processing by way of receiving.
The structure of the present invention includes:Including chuck 3;Blind rivet connector is installed in the countersunk head hole seat of the upper end of chuck 3 9;There is counter sink on the blind rivet connector 9, pressure sensor 8 is installed in each counter sink;The blind rivet connector 9 passes through biography Sensor pressing plate 6 is fixed with chuck 3;The Kong Bingyong holding screws 10 of blind rivet 5 through sensor pressing plate 6 and blind rivet connector 9 are fixed.
Pressure sensor 8 therein is with addition of wireless blue tooth module;The pressure sensor 8 is outer with addition of positioning shell.
The circumference uniform distribution stepped hole that the with good grounds sensor pressing plate 6 in the upper surface of chuck 3 manufactures;The bottom of chuck 3 is provided with signal Transmission hole 4.
The cylindricity of the countersunk head hole seat of blind rivet connector 9 is installed in φ 0.01mm on the chuck 3.
Counter sink on the blind rivet connector 9 is the counter sink of circumference uniform distribution, and each hole axle is no more than to depth difference 0.01mm, each leaded groove in counter sink side.
The upper surface of chuck 3 and spot-facing surface roughness reach more than Ra1.6, and flatness is no more than 0.02mm.
Sensor pressing plate 6 between the shaft shoulder lower surface of blind rivet 5 and the upper surface of sensor 8 without end-play, in sensor pressing plate 6 Hole has 0.03-0.05mm sideshake with blind rivet 5.
The present invention can also be come by existing milling machine and handle of a knife transformation, and adaptation step and application method are specially:
Main parts size has:Wireless pressure sensor, standard BT40-ER-2-100L collets, portable computer (Include Bluetooth signal receiver).Referring in particular to accompanying drawing 1 ~ 11, the invention will be further described, and step is as follows:
Step 1:A kind of existing pressure sensor is transformed, transformation part is:(1)With addition of positioning shell(Such as figure 10);(2)With addition of wireless blue tooth module, to realize wireless data transmission.Wireless pressure sensor operation principle is as schemed after transformation 11;
Step 2:Select a standard elastic chuck(The present invention is by taking BT40-ER-2-100L as an example), in order to precisely detect Main shaft folder bits position and folder bits size, 6 circumference uniform distribution stepped holes are manufactured in chuck upper surface according to sensor pressing plate size(Such as Fig. 5), 2 signal transmission holes are left in bottom;Simultaneously according to blind rivet connector(Such as Fig. 9)Countersunk head hole seat is manufactured, and ensures hole Cylindricity is in φ 0.01mm;Corresponding blind rivet structure is transformed, using split modular structure, such as Fig. 6;Increase blind rivet to connect Junctor, there is 8 counter sinks designed for pressure sensor dimensions on connector, and the axial depth difference in each hole must not exceed 0.01mm, each counter bore side leave wire lead slot, such as Fig. 9;
Step 3:Confirm wireless distances sensor cluster, check battery, bluetooth module and internal circuit, assemble no line-spacing From sensor, detection direction is determined;Sensor loads blind rivet connector, and transformation blind rivet is passed through into sensor plate hole and blind rivet Connector is fixed with holding screw, ensures that sensor pressing plate bears one between blind rivet step lower surface and blind rivet connector upper surface Fixed pretightning force;
Step 4:The blind rivet in step 3, blind rivet connector and sensor pressing plate sub-assembly are fixed on chuck with screw End;Connect signal receive and processing computer, start sensor, by adjusting axial location, determine sensor flexibly by Power, and make it that each sensor reading is consistent;
Step 5:The handle of a knife for assembling sensor is preloaded onto vertical numerical control milling machine(Exemplified by VWC8508)On, setting is overproof Threshold value △ g, when main shaft is in static and operation two states, any synchronization pressure sensor numerical value all meets Gmax- Gmin≤△ g, complete to knife process;
Step 6:During following process, the reading of each pressure sensor of synchronization after each tool changing(Spindle Static When only)If Gmax-Gmin > △ g, system then automatic alarm;If Gmax-Gmin≤△ g, can continue to add Work, wireless pressure sensor is closed automatically after 1 minute.

Claims (6)

  1. A kind of 1. machine tool chief axis folder bits warning device based on strain pressure transducer, it is characterised in that:Including chuck(3); The chuck(3)Blind rivet connector is installed in the countersunk head hole seat of upper end(9);The blind rivet connector(9)On have counter sink, respectively Pressure sensor is installed in counter sink(8);The blind rivet connector(9)Pass through sensor pressing plate(6)With chuck(3)It is fixed; Blind rivet(5)Through sensor pressing plate(6)On hole, and with blind rivet connector(9)Pass through holding screw(10)It is fixed;
    The pressure sensor(8)With addition of wireless blue tooth module;The pressure sensor(8)Outside with addition of positioning shell;
    The chuck(3)The with good grounds sensor pressing plate in upper surface(6)The circumference uniform distribution stepped hole manufactured;Chuck(3)Bottom open There is signal transmission hole(4).
  2. 2. the machine tool chief axis folder bits warning device according to claim 1 based on strain pressure transducer, its feature exist In:The chuck(3)Upper installation blind rivet connector(9)Countersunk head hole seat cylindricity in φ 0.01mm.
  3. 3. the machine tool chief axis folder bits warning device according to claim 1 based on strain pressure transducer, its feature exist In:The blind rivet connector(9)On counter sink be circumference uniform distribution counter sink, each hole axle is no more than 0.01mm to depth difference, Each leaded groove in counter sink side.
  4. 4. the machine tool chief axis folder bits warning device according to claim 1 based on strain pressure transducer, its feature exist In:The chuck(3)Upper surface and spot-facing surface roughness reach more than Ra1.6, and flatness is no more than 0.02mm.
  5. 5. the machine tool chief axis folder bits warning device according to claim 1 based on strain pressure transducer, its feature exist In:Sensor pressing plate(6)In blind rivet(5)Shaft shoulder lower surface and sensor(8)Without end-play, sensor pressing plate between upper surface (6)Endoporus and blind rivet(5)There is 0.03-0.05mm sideshake.
  6. A kind of 6. user of the machine tool chief axis folder bits warning device based on strain pressure transducer as claimed in claim 1 Method, it is characterised in that:Comprise the following steps:
    Step 1:The computer that signal is received and handled is connected, starts sensor(8), by adjusting axial location, it is determined that passing The flexible stress of sensor, and make it that each sensor reading is consistent;
    Step 2:By handle of a knife(3)It is preloaded onto on vertical numerical control milling machine, sets overproof threshold value △ g, static and operation is in main shaft During two states, any synchronization pressure sensor numerical value all meets Gmax-Gmin≤△ g, completes to knife process;
    Step 3:During following process, the synchronization pressure sensor readings after each tool changing, if Gmax-Gmin > △ g, system automatic alarm;If Gmax-Gmin≤△ g, it can continue to process.
CN201610190840.8A 2016-03-30 2016-03-30 Machine tool chief axis folder bits warning device and method based on strain pressure transducer Expired - Fee Related CN105619177B (en)

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CN107131990B (en) * 2017-05-24 2020-06-09 江苏大学 HSK handle of a knife terminal surface clamp force measuring device
CN109352416B (en) * 2018-12-05 2019-12-27 上海交通大学 Alarming method and device for clamping chips of machine tool spindle and/or winding chips of cutter
CN109290850B (en) * 2018-12-25 2019-06-18 烟台大学 A kind of numerically-controlled machine tool viscous bits detection system of electro spindle
CN110695765B (en) * 2019-12-16 2020-03-31 烟台大学 Piezoelectric drive type electric spindle chip clamping detection device for numerical control machine tool
CN111015347A (en) * 2019-12-30 2020-04-17 江西乔扬数控设备有限公司 Automatic alarm device for dislocation of gantry cutter
CN111300132B (en) * 2020-03-31 2021-09-03 上海交通大学烟台信息技术研究院 Calibrating instrument for tool holder scrap clamping detection device
CN111113118B (en) * 2020-03-31 2020-07-07 上海交通大学烟台信息技术研究院 Magnetic suction punching type tool shank scrap clamping detection device calibration tool
CN112720064B (en) * 2021-01-04 2022-07-08 吉林大学 Numerical control machine tool spindle cutter clamping detection device based on reliability design
CN113231890B (en) * 2021-07-08 2021-10-12 山东捷瑞数字科技股份有限公司 Numerical control machine tool electric spindle tool shank clamp with digital twin system

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