CN109324058A - A kind of detection device for tool wear - Google Patents

A kind of detection device for tool wear Download PDF

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Publication number
CN109324058A
CN109324058A CN201811266084.8A CN201811266084A CN109324058A CN 109324058 A CN109324058 A CN 109324058A CN 201811266084 A CN201811266084 A CN 201811266084A CN 109324058 A CN109324058 A CN 109324058A
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CN
China
Prior art keywords
detection
tool
data processing
communication
vision detection
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Pending
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CN201811266084.8A
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Chinese (zh)
Inventor
桑宏强
张新建
金国光
刘丽冰
刘芬
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Tianjin Polytechnic University
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Tianjin Polytechnic University
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Application filed by Tianjin Polytechnic University filed Critical Tianjin Polytechnic University
Priority to CN201811266084.8A priority Critical patent/CN109324058A/en
Publication of CN109324058A publication Critical patent/CN109324058A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84Systems specially adapted for particular applications
    • G01N21/88Investigating the presence of flaws or contamination
    • G01N21/8851Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges

Abstract

The invention discloses a kind of cutter abrasion detection devices for numerical control machining center, it include mainly vision detection system and communication system two parts, wherein vision detection system is made of image capturing system, data processing system, power-supply management system and four part of shell.Described image acquisition system mainly completes Image Acquisition task, and the data processing system mainly completes tasks, the communication systems such as parsing machine tool instructions, control camera, operation algorithm and mainly completes the communication task between lathe and monitoring system.When needing Cutter wear state-detection, it is instructed by tool changing and changes to vision detection system on machine tool chief axis, workpiece surface texture image is acquired by image capturing system, data processing system operation algorithm obtains tool wear grade, result is back to machine operation system variable by bluetooth and communication system, carry out cutter compensation or do alert process etc..The present invention has many advantages, such as compact structure, integrated, intelligent.

Description

A kind of detection device for tool wear
Technical field
It is the invention discloses a kind of detection device for tool wear, in particular to a kind of for numerical control machining center Cutter abrasion detection device.
Background technique
In mechanical processing process, the abrasion of cutter not only will affect the quality of part, but also will lead to the vibration of lathe It impacts and then the precision of lathe is impacted.Monitoring of Tool Condition generallys use the state letter of various sensor acquisition cutters Breath, the signal of acquisition is handled, and establishes the mapping relations between feature and cutting-tool wear state, realizes cutting-tool wear state Detection.However, the course of work due to cutter is complicated, the relationship mapped between signal characteristic and state of wear is usually non-linear , therefore, it is difficult to accurately be quantitatively described.This problem is avoided using the method for machine vision, but it is existing based on machine The detection device of device vision technique has computer participation, and is all offline inspection, and occupied space is big, not only reduces production effect Rate, and increase cost.Embedded is dedicated system, have it is easy to use, occupy little space, it is at low cost the advantages that.Make The advantages of combining the two with the mode that embedded technology is combined with machine vision technique, ad hoc one kind of counting is based on machine vision Tool wear detection device.
Summary of the invention
The present invention fills up the blank that tool wear technology is realized based on embedded machine vision, provides a kind of On-machine Test knife Has the device of abrasion.
In order to achieve the above object, the technical scheme adopted by the invention is that:
A kind of detection device for tool wear includes vision detection system and communication system two parts, and wherein vision is examined Examining system is made of image capturing system, data processing system, power-supply management system and four part of shell.
Described image acquisition system is mainly made of camera, light source and camera lens, and major function is to obtain workpiece surface Texture information.Due to acquisition be workpiece texture image, need using microlens observe workpiece surface details.Light source root According to needing to use annular light source, camera uses CMOS camera, and the communication interface of camera is gigabit Ethernet.
The data processing system major function is processing data, control image capturing system and responsible and communication system Communication.Data processing system carries out image capturing system focusing using the kinematic system of numerically-controlled machine tool, and controls Image Acquisition The image of system acquisition workpiece surface, is handled with image processing algorithm, and passes through bluetooth and communication system for result It is sent in the system variable of machine operation system, to carry out cutter compensation, to guarantee the precision of processing, if cutter reaches Blunt standard reminds user's tool changing, while warning message being shown on human-computer interaction interface.
The major function of the power-supply management system is the charge and discharge protecting of battery, voltage conversion and the power supply control of light source System.
The shell is mainly used for installing image capturing system, data processing system, power-supply management system and lithium battery. Shell is mainly made of connecting rod, end cap, knife handle connector, camera support part, PVC shell.
The communication system is used to realize the communication between machine operation system and vision detection system.Communication system parsing The instruction that machine operation system is sent by RS232 or Ethernet interface, and will instruction by Bluetooth transmission to vision detection system, After vision detection system completes Image Acquisition and image processing tasks, processing result, that is, wear level is sent to by bluetooth Communication system, communication system are sent to machine operation system by RS232 or Ethernet.Communication system also includes a storage Device can read the information of the memory for storing the wear information of log information and cutter by PC, analyze tool wear Rule.Communication modes between vision detection system and communication system use bluetooth communication mode, but are not limited to bluetooth, such as The wireless modes such as Zigbee, WIFI, NB-LOT, GPRS are connected cutter abrasion detection device by way of ID or pairing Come, forms sensor network, and then be monitored to the machine tool state in entire workshop.
The present invention has the advantage that
1. the invention, which can be realized, carries out tool wear monitoring in machine.Existing detection technique is compared, the present invention does not need Shutdown, which unloads cutter from main shaft, to be detected, and is improved processing efficiency, is reduced cost.
2. realizing the communication between vision detection system and communication system using bluetooth in the invention.By bluetooth by workshop Numerically-controlled machine tool connect composition wireless sensor network, carry out the state of wear of Centralized Monitoring cutter.
3. the invention is wirelessly updated vision detection system program, do not need to dismantle it, System bring insecurity factor is given so as to avoid frequent dismounting.
4. the invention has many advantages, such as compact structure, integrated level is high, connect with standard knife handle, versatility is stronger.
Detailed description of the invention
Fig. 1 is installation site when cutter abrasion detection device works and the connection schematic diagram with lathe;
Fig. 2 is vision detection system and knife handle connection structure diagram;
Fig. 3 is data processing system and power-supply management system installation diagram;
Fig. 4 is lithium battery fixed structure chart;
Fig. 5 is cutter abrasion detection device general frame schematic diagram;
Fig. 6 is cutter abrasion detection device process for using figure;
In figure: 1 communication system, 2 machine tool chief axis, 3 vision detection systems, 4 workpiece, 5 numerically-controlled machine tool lathe beds, 6 machine tool feeds System, 7 blind rivets, 8 knife handles, 9 holding screws, 10 lithium batteries, 11 knife handle connectors, 12PVC shell, 13 battery fixinig plates, 14 is tight Determine screw, 15 connecting rods, 16 data processing systems, 17 power-supply management systems, 18 camera support parts, 19 cameras, 20 charging interfaces, 21 end caps, 22 system power switch, 23 camera lenses, 24 battery mounting plates
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not For limiting the present invention.
The purpose of the present invention is to provide a kind of detection devices for tool wear, realize the abrasion of On-machine Test cutter State.
Installation site when working as shown in Figure 1 for cutter abrasion detection device and the connection relationship signal with lathe Figure, vision detection system 3 are installed on the main shaft 2 of numerically-controlled machine tool, and workpiece 4 is fixed on Machine Tool Feeding System 6.Vision-based detection system System 3 is wirelessly communicated with communication system 1, and data and instruction is transmitted.Communication system 1 and numerical tool operation system Between communication be RS232 or ethernet communication.
It is illustrated in figure 2 the schematic diagram that vision detection system of the invention is connect with standard knife handle.Four 15 liang of connecting rod There is threaded hole at end, and end cap 21 and knife handle connector 11 are installed by screw respectively in four be placed in parallel piece connecting rod, 15 both ends. Four connecting rods have sliding slot, by sliding slot, end cap 21 inner surface and slideway on installation holding screw 14 by data Processing system is immobilized in the shell portion, and power-supply management system is similar with the mounting means of data processing system to be immobilized in the shell Portion.Camera 19 is connected by screw to by three threaded holes of bottom with L-type camera support part 18, is installed on end cap by screw 21, camera aperture, switch interface hole and charging oral pore are provided on end cap 21.The other end installation knife handle of four connecting rods 15 connects The mounting hole of fitting 11, the projecting shaft insertion knife handle 8 of knife handle connector 11 passes through holding screw 9 for shell and vision detection system Fixed, similar one is mounted in cutter in machine cutter holder, calls out system when needing, and is instructed by tool changing by vision-based detection system System is changed on machine tool chief axis, and coherent detection is carried out.In figure 12 be vision detection system PVC shell, the material be it is nonmetallic, benefit In the transmission of electromagnetic wave.The axis coaxle of camera lens axis and knife handle connector.
It is illustrated in figure 3 data processing system and power-supply management system installation diagram, is made up of two connecting rods 15 Slideway, data processing system 16 are placed in slideway, and in addition two sides limit one-movement-freedom-degree by end cap 21 and holding screw 14, from And data processing system 16 has been completely fixed it.Slideway equally is formed by two connecting rods 15, power-supply management system 17 is placed in slideway In, two outer two sides limit its one-movement-freedom-degree by end cap 21 and battery mounting plate 24, to secure power-supply management system.Its Middle battery mounting plate is the pcb board of unwelded power-supply management system, and it is multi-purpose to realize a plate.
It is illustrated in figure 4 lithium battery fixed structure chart, battery fixinig plate 13 passes through battery mounting plate 24 will be electric by screw Pond 10 is installed together with battery mounting plate 24, can be used foam double-side glue or rubber to increase between battery 10 and battery mounting plate The frictional force being powered between pond 10 and battery mounting plate 25, keeps its connection stronger.
Be illustrated in figure 5 cutter abrasion detection device general illustration, data processing system in figure, image capturing system, Power-supply management system and lithium battery are fixedly mounted in the housing, are connect shell with knife handle by holding screw.Image Acquisition Communication between system and data processing system is gigabit Ethernet, power-supply management system to image capturing system and data at Manage system power supply.Communication between data processing system and communication system uses bluetooth communication, communication system and machine operation system Communication between system uses RS232 or ether net mode.
System process for using figure as shown in Figure 6, when not using vision detection system, system is installed in machine cutter holder, In low power operation state.When needing Cutter wear state to be detected, instructed by lathe tool changing by visual examination system It changes on machine tool chief axis, while machine operation system sends activation vision detection system to vision detection system by communication system Instruction, vision detection system initialization complete.Vision detection system is moved to operating position by the kinematic system of lathe Near, the picture that camera acquires workpiece surface in real time determines the relative position of workpiece and vision detection system by algorithm, passes through The kinematic system of feedback control lathe makes camera be moved to accurate operating position.Data processing system sends Image Acquisition and refers to Enable, control image capturing system carries out Image Acquisition and opens light source simultaneously, collect close after workpiece surface picture light source and Camera, at the same time, lathe by power signal of lathe etc. by communication system and bluetooth be sent to data processing system with Processing result image carries out information fusion, obtains tool wear class information, is as a result back to via bluetooth and communication system The operating system of lathe can carry out cutter compensation operation.Detection finishes, and is instructed using tool changing, and visual examination system is changed in tool magazine, Lathe works on.Above procedure realizes the On-machine Test of tool wear.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description, Different cameras, camera lens and light source are such as selected according to different scenes, which is applicable to the defect of detection part, measurement The scenes such as workpiece size, and all these modifications and variations should all belong to the protection domain of appended claims of the present invention.

Claims (3)

1. a kind of detection device for tool wear, it is characterised in that: the detection device includes vision detection system and leads to News system two parts, wherein vision detection system is by image capturing system, data processing system, power-supply management system and shell Four parts composition, described image acquisition system are mainly made of camera, camera lens and light source, image capturing system, data processing System and power-supply management system are installed in the housing by mechanical connection, the installation of the projecting shaft insertion knife handle of housing end plug Shell and knife handle are fixed by holding screw in hole, similar to one Cutting tool installation manner in the tool magazine of lathe, when needing to detect knife When the abrasion condition of tool, lathe is instructed by tool changing and changes to vision detection system on machine tool chief axis from tool magazine, passes through acquisition The position of the image and lathe that arrive judges the position of vision detection system, feedback adjustment, by the v kinematic system for controlling lathe It is moved to vision detection system on operating position, picture is acquired by image capturing system and is carried out by data processing system Processing result is back to machine operation system variable area by bluetooth and communication system, carries out cutter compensation control by reason, To guarantee the precision of processing, if cutter has reached blunt standard, user's tool changing is reminded, while warning message being shown man-machine On interactive interface.
2. a kind of detection device for tool wear described in accordance with the claim 1, it is characterised in that: battery fixinig plate passes through Battery and battery mounting plate, are installed together by screw, are by the power-supply management system pcb board of battery mounting plate, that is, unwelded Battery provides installation site.
3. a kind of detection device for tool wear described in accordance with the claim 1, it is characterised in that: image capturing system, Data processing system and power-supply management system are installed in shell, and shell uses PVC material, are conducive to electromagnetic wave when wireless telecommunications Propagation.
CN201811266084.8A 2018-10-26 2018-10-26 A kind of detection device for tool wear Pending CN109324058A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111085732A (en) * 2019-12-31 2020-05-01 上海妙鹭智能科技有限公司 Flexible fluting system of intelligence panel
CN112846941A (en) * 2019-11-28 2021-05-28 中国商用飞机有限责任公司 Machine tool with notch appearance detection function and notch appearance detection method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102564314A (en) * 2011-12-06 2012-07-11 上海交通大学 Orthogonal vision detection system for detecting wear condition of end mill
CN102566504A (en) * 2012-01-19 2012-07-11 河北工业大学 General diagnosing and repairing tool for numerical control machine
CN206855141U (en) * 2017-04-01 2018-01-09 深圳市蓝海永兴实业有限公司 A kind of milling cutter wears on-line measuring device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102564314A (en) * 2011-12-06 2012-07-11 上海交通大学 Orthogonal vision detection system for detecting wear condition of end mill
CN102566504A (en) * 2012-01-19 2012-07-11 河北工业大学 General diagnosing and repairing tool for numerical control machine
CN206855141U (en) * 2017-04-01 2018-01-09 深圳市蓝海永兴实业有限公司 A kind of milling cutter wears on-line measuring device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112846941A (en) * 2019-11-28 2021-05-28 中国商用飞机有限责任公司 Machine tool with notch appearance detection function and notch appearance detection method
CN111085732A (en) * 2019-12-31 2020-05-01 上海妙鹭智能科技有限公司 Flexible fluting system of intelligence panel

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