CN113210686A - Transient milling temperature testing device capable of following cutter-chip contact wear - Google Patents

Transient milling temperature testing device capable of following cutter-chip contact wear Download PDF

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Publication number
CN113210686A
CN113210686A CN202110548220.8A CN202110548220A CN113210686A CN 113210686 A CN113210686 A CN 113210686A CN 202110548220 A CN202110548220 A CN 202110548220A CN 113210686 A CN113210686 A CN 113210686A
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CN
China
Prior art keywords
temperature
milling
film
cutter
milling cutter
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Pending
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CN202110548220.8A
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Chinese (zh)
Inventor
崔云先
曹凯迪
殷俊伟
贾颖
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Dalian Jiaotong University
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Dalian Jiaotong University
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Priority to CN202110548220.8A priority Critical patent/CN113210686A/en
Publication of CN113210686A publication Critical patent/CN113210686A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C3/00—Milling particular work; Special milling operations; Machines therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C9/00—Details or accessories so far as specially adapted to milling machines or cutter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, 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
    • B23Q11/00—Accessories 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
    • B23Q11/10—Arrangements for cooling or lubricating tools or work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, 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
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/09—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool
    • B23Q17/0952—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining
    • B23Q17/0985—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining by measuring temperature

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

The invention provides a transient milling temperature testing device capable of following cutter-chip contact wear, which comprises: the milling cutter comprises a milling cutter blade, a T-shaped milling cutter handle connected with the milling cutter blade in a matched mode, a temperature acquisition and emission terminal embedded in the T-shaped milling cutter handle, and a follow-up abrasion film thermocouple temperature sensor embedded in the front cutter face of the milling cutter blade. According to the invention, the follow-up wear film thermocouple temperature sensor is embedded in the front cutter face of the milling cutter blade, so that the follow-up wear of a hot junction of the sensor is realized, the sensor can be detached and replaced, the problem that the temperature of the contact area of the front cutter face of the cutter and chips cannot be measured by a traditional measuring method is solved, and the temperature acquisition and transmission terminal is embedded in the cutter handle, so that a temperature signal can be wirelessly transmitted to a PC (personal computer) end in real time in the milling process to display the real-time temperature in a changing curve form, and a new method and a new technical approach are provided for transient temperature measurement in high-speed milling and precision machining.

Description

Transient milling temperature testing device capable of following cutter-chip contact wear
Technical Field
The invention relates to the technical field of transient milling temperature detection technology and sensors, in particular to a milling temperature testing device based on a thin film thermocouple temperature sensor.
Background
With the increasing level of automation and intelligence of machining systems, especially in high-speed, precision and ultra-precision machining, milling temperature and distribution are one of the key factors affecting the life of the tool and the machining quality. The accurate measurement of the temperature and distribution of the milling area is always a hot spot and a difficult problem in the research of the milling mechanism. Milling temperature is one of the most important parameters in the high-speed milling process, and in the cutting process, due to the comprehensive action of factors such as cutting force, cutting heat, cutting-in and cutting-out impact and the like, the contact surface of a cutter and a workpiece can undergo the change of a complex and transient temperature field to generate abrasion and damage, so that the quality of the processed surface is degraded, and the dimensional accuracy of parts and the processing efficiency of a machine tool are reduced. Therefore, how to rapidly, reliably and accurately acquire the transient temperature information of the contact area between the front tool face of the cutter and the cutting chip in the milling process is widely concerned by researchers, and designing and developing a temperature sensing device meeting the application requirements is a necessary condition for realizing intelligent monitoring in the milling process, and is one of the keys for realizing intelligent manufacturing.
Because a workpiece is fixed, a cutter rotates, the blade performs intermittent cutting in the milling process, and a non-contact temperature measurement method cannot obtain the accurate temperature of the contact area of the rake face of the blade and chips in the machining process, the traditional contact temperature measurement method is easy to damage a sensor due to inevitable friction.
Disclosure of Invention
In accordance with the above-mentioned technical problem, a transient milling temperature testing device capable of following the contact wear of the tool and the chip is provided. According to the invention, the thin-film thermocouple temperature sensor capable of following abrasion is embedded in the front cutter face of the milling cutter blade, the sensor can be detached and replaced, and the hot junction of the sensor can follow abrasion. The temperature measuring method solves the problem that the traditional measuring method cannot measure the temperature of the contact area between the front cutter surface of the cutter and the cutting chips, and the temperature acquisition and emission device is embedded in the milling cutter handle, so that the temperature is wirelessly transmitted to the pc end in real time in the milling process to display the real-time temperature in a changing curve form, a new method and a new technical approach are provided for temperature measurement in high-speed milling and precision machining, and the temperature measuring method has important application value.
The technical means adopted by the invention are as follows:
a transient milling temperature test device that can follow tool-chip contact wear, comprising: the temperature measuring device comprises a milling blade, a T-shaped milling cutter handle, a temperature acquisition and emission terminal and a thin-film thermocouple temperature sensor, wherein the T-shaped milling cutter handle is connected with the milling blade in a matched mode, the temperature acquisition and emission terminal is embedded in the T-shaped milling cutter handle, the thin-film thermocouple temperature sensor is embedded in the front cutter face of the milling blade and can follow abrasion, the thin-film thermocouple temperature sensor is connected with the temperature acquisition and emission terminal through a compensation wire, and a temperature signal is transmitted to a pc-end upper machine position through wireless transmission to realize real-time measurement of transient milling temperature.
Further, the follow-up wear thin-film thermocouple temperature sensor comprises a wedge-shaped ceramic substrate made of 99 alumina ceramic material, a first compensation lead and a second compensation lead fixed in the substrate, a first hot electrode thin film and a second hot electrode thin film which are sequentially deposited on the substrate, and protective thin films deposited on the two hot electrode thin films.
Further, the milling cutter blade is made of hard alloy, and a wedge-shaped groove is formed in the front cutter face of the milling cutter blade and used for placing a thermocouple temperature sensor capable of following abrasion.
Furthermore, a square groove is formed in the T-shaped milling cutter handle and used for placing a temperature acquisition and emission terminal fixing assembly, and the temperature acquisition and emission terminal is fixed inside the temperature acquisition and emission terminal fixing assembly.
Furthermore, two bolt grooves and a first compensation lead through hole are formed in the T-shaped milling cutter handle; and a second compensation lead through hole is formed at the joint of the T-shaped milling cutter handle and the milling cutter blade.
Further, the temperature acquisition and emission terminal fixing component is in a hollow cuboid shape, through holes are formed in the left side and the right side of the temperature acquisition and emission terminal fixing component respectively, and bolts on the two sides are in interference fit with two bolt grooves in the position of the cutter handle and used for fixing the temperature acquisition and emission terminal; the lower side wall is provided with a lead through hole.
Further, the first compensation wire through hole and the wire through hole correspond to each other.
Furthermore, the temperature acquisition and emission terminal fixing component is made of a polytetrafluoroethylene material.
Further, the second thermode film is lapped on the first thermode film, and a lapped area is formed as a hot junction area which can follow the abrasion.
Further, the first thermoelectric electrode film is a NiCr film; the second hot electrode film adopts a NiSi film; the first compensation lead adopts a NiCr lead; the second compensation wire adopts an NiSi lead; the protective film adopts SiO2A film.
Compared with the prior art, the invention has the following advantages:
1. the milling temperature testing device provided by the invention adopts the thin-film thermocouple temperature sensor capable of following abrasion, and has the advantages of self-updating of hot junction, follow-up abrasion, long service life, high dynamic response speed, high sensitivity and the like.
2. According to the milling temperature testing device provided by the invention, the thin-film thermocouple temperature sensor capable of following abrasion is embedded in the front cutter face of the hard alloy milling cutter blade, the device has the advantages of being detachable and replaceable, and the thin-film thermocouple temperature sensor directly participates in cutting along with the milling cutter blade, so that the transient temperature measurement of the contact area between the front cutter face of the milling cutter and the cutting chips can be realized.
Based on the reasons, the invention can be widely popularized in the fields of transient milling temperature detection technology, sensors and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of the overall structure of the milling temperature testing device of the present invention.
Fig. 2 is a three-dimensional schematic view of a T-shaped milling cutter handle of the milling temperature testing device of the invention.
FIG. 3 is a schematic view of the thin film thermocouple temperature sensor and cemented carbide milling insert assembly of the present invention.
Fig. 4 is an exploded view of a thin film thermocouple temperature sensor in accordance with the present invention.
FIG. 5 is a detailed view of a thin film thermocouple temperature sensor electrode of the present invention.
Fig. 6 is a three-dimensional schematic view of a temperature acquisition and transmission terminal fixing assembly according to the present invention.
Fig. 7 is a working block diagram of the transient temperature acquisition and wireless transmission system of the device of the present invention.
In the figure: 1. a T-shaped milling cutter handle; 1-1, bolt grooves; 1-2, a first compensation wire through hole; 1-3, a second compensation lead through hole; 1-4, a square groove; 2. the temperature acquisition and transmission terminal fixing component; 2-1, a wire through hole; 3. a bolt; 4. a compensation wire; 4-1, a second compensation conductor; 4-2, a first compensation conductor; 5. milling a blade; 6. a thin film thermocouple temperature sensor; 6-1, a ceramic substrate; 6-2, a first thermode film; 6-3, a second thermode film; 6-4, a protective film; 6-5, hot junction area; 7. and (5) fastening the screw.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
As shown in fig. 1, the present invention provides a transient milling temperature test device capable of following tool-chip contact wear, comprising: milling cutter blade 5, with T type milling cutter handle of a knife 1 that milling cutter blade 5 cooperation is connected, the embedding is at the inside temperature acquisition transmitting terminal of T type milling cutter handle of a knife 1, the embedding can follow wearing and tearing film thermocouple temperature sensor 6 on 5 rake face of milling cutter blade, film thermocouple temperature sensor 6 passes through compensating wire 4 and connects the signal input part of temperature acquisition transmitting terminal, the transmission of cutting production thermoelectric force, the thermoelectric force is through temperature acquisition transmitting terminal analog to digital conversion to temperature signal, temperature signal is through wireless transmission to PC end machine position, realize milling the real-time measurement of temperature.
In specific implementation, as a preferred embodiment of the present invention, as shown in fig. 3, the milling insert 5 is made of cemented carbide, and is fixed on the T-shaped milling cutter holder by a fastening screw 7, and a wedge-shaped groove is formed on a rake surface of the milling insert 5 for placing a thermocouple temperature sensor 6 capable of following wear.
In specific implementation, as a preferred embodiment of the present invention, as shown in fig. 4 and 5, the temperature sensor 6 includes a ceramic substrate 6-1 made of a 99-alumina ceramic material, a first compensation wire 4-2 and a second compensation wire 4-1 fixed in the substrate 6-1, a first hot electrode film 6-2 and a second hot electrode film 6-3 sequentially deposited on the substrate 6-1, and a protection film 6-4 deposited on the second hot electrode film 6-3; the second thermode film 6-3 is overlapped on the first thermode film 6-2, and the overlapped area is formed as a hot junction area 6-5 which can follow the abrasion.
In specific implementation, as a preferred embodiment of the present invention, a NiCr thin film is used as the first thermode thin film 6-2; the second thermal electrode film 6-3 is a NiSi film; the first compensation lead 4-2 adopts a NiCr lead; the second compensation lead 4-1 adopts an NiSi lead; the protective film 6-4 adopts SiO2A film.
In specific implementation, as a preferred embodiment of the present invention, as shown in fig. 2, a square groove 1-4 is formed on the T-shaped milling cutter handle 1 for placing a temperature acquisition and emission terminal fixing component, and the temperature acquisition and emission terminal is fixed inside the temperature acquisition and emission terminal fixing component 2. The T-shaped milling cutter handle 1 is also provided with two bolt grooves 1-1 and a first compensation lead through hole 1-2; and a second compensation lead through hole 1-3 is formed at the joint of the T-shaped milling cutter handle 1 and the milling cutter blade 5. The T-shaped milling cutter handle 1 is a standard T-shaped numerical control cutter handle, the model of the numerical control cutter handle is ATS 60-C40-H28-160-4T, and the length of the numerical control cutter handle 1 is selected along with the size of the temperature acquisition and emission terminal fixing component 2;
in specific implementation, as a preferred embodiment of the present invention, as shown in fig. 6, the temperature acquisition and emission terminal fixing assembly 2 is a hollow cuboid, through holes are respectively formed on the left and right sides, and bolts on both sides are in interference fit with two bolt grooves 1-1 at the handle, and are used for fixing the temperature acquisition and emission terminal; after the temperature acquisition terminal is loaded, the intelligent milling cutter keeps dynamic balance during machining, and the lower side wall is provided with a lead through hole 2-1. The temperature acquisition transmitting terminal fixing component 2 is processed into a cuboid shell shape by adopting a linear cutting technology and a laser welding technology.
In specific implementation, as a preferred implementation mode of the invention, in order to reduce interference on wireless data transmission signals, the temperature acquisition transmitting terminal fixing components are all made of polytetrafluoroethylene.
In conclusion, the transient milling temperature testing device can be applied to measurement of transient milling temperature, the thin-film thermocouple temperature sensor capable of following wear is embedded in the front cutter face of the milling cutter blade, the thin-film thermocouple temperature sensor can wear along with the milling cutter blade while being convenient to detach and replace, so that the sensor can monitor the transient temperature of the contact area between the front cutter face of the milling cutter and the cutter bits in real time, the temperature acquisition and emission device is embedded in the milling cutter handle, and the temperature is wirelessly transmitted to the pc end in real time in the milling process to display the real-time temperature in a changing curve form. Therefore, the invention has the advantages of detachability, replaceability, self-updating of the hot junction, high dynamic response speed, high sensitivity, accurate and real-time measurement of the transient temperature of the milling area and the like. The invention provides a new method for testing the transient milling temperature and provides a new technical approach for the research and development of the intelligent milling temperature-measuring cutter.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A transient milling temperature test device capable of following tool-chip contact wear, comprising: the temperature measuring device comprises a milling blade, a T-shaped milling cutter handle, a temperature acquisition and emission terminal and a thin-film thermocouple temperature sensor, wherein the T-shaped milling cutter handle is connected with the milling blade in a matched mode, the temperature acquisition and emission terminal is embedded in the T-shaped milling cutter handle, the thin-film thermocouple temperature sensor is embedded in the front cutter face of the milling blade and can follow abrasion, the thin-film thermocouple temperature sensor is connected with the temperature acquisition and emission terminal through a compensation wire, and a temperature signal is transmitted to a pc-end upper machine position through wireless transmission to realize real-time measurement of transient milling temperature.
2. The apparatus of claim 1, wherein the thin film thermocouple temperature sensor comprises a wedge-shaped ceramic substrate made of a 99 alumina ceramic material, a first compensation wire and a second compensation wire fixed in the substrate, a first hot electrode film and a second hot electrode film sequentially deposited on the substrate, and a protection film deposited on the two hot electrode films.
3. The device for testing the transient milling temperature of the follower tool-chip contact wear according to claim 1, wherein the milling cutter blade is made of hard alloy, and a wedge-shaped groove is formed in a front cutter surface of the milling cutter blade and used for placing a thermocouple temperature sensor of the follower wear film.
4. The transient milling temperature testing device capable of following the contact wear of the cutter and the chip as claimed in claim 1, wherein the T-shaped milling cutter handle is provided with a square groove for placing a temperature acquisition and emission terminal fixing component, and the temperature acquisition and emission terminal is fixed inside the temperature acquisition and emission terminal fixing component.
5. The transient milling temperature testing device capable of following cutter-chip contact wear according to claim 4, wherein two bolt grooves and a first compensating lead through hole are further formed in the T-shaped milling cutter handle; and a second compensation lead through hole is formed at the joint of the T-shaped milling cutter handle and the milling cutter blade.
6. The transient milling temperature testing device capable of following cutter-chip contact wear is characterized in that the temperature acquisition and emission terminal fixing component is in a hollow cuboid shape, through holes are formed in the left side and the right side of the temperature acquisition and emission terminal fixing component respectively, and bolts on the two sides are in interference fit with two bolt grooves in the position of the cutter handle and used for fixing the temperature acquisition and emission terminal; the lower side wall is provided with a lead through hole.
7. The apparatus of claim 5, wherein the first compensating lead through hole and the lead through hole correspond to each other.
8. The apparatus of claim 6, wherein the temperature acquisition and emission terminal fixture assembly is made of polytetrafluoroethylene.
9. The transient milling temperature test device capable of following tool-chip contact wear according to claim 2, wherein the second thermode film is overlapped on the first thermode film, and the overlapped area is formed as a hot junction area capable of following wear.
10. The transient milling temperature test device capable of following cutter-chip contact wear according to claim 2, characterized in that the first thermoelectric electrode film is a NiCr film; the second hot electrode film adopts a NiSi film; the first compensation lead adopts a NiCr lead; the second compensation wire adopts an NiSi lead; the protective film adopts SiO2A film.
CN202110548220.8A 2021-05-19 2021-05-19 Transient milling temperature testing device capable of following cutter-chip contact wear Pending CN113210686A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110548220.8A CN113210686A (en) 2021-05-19 2021-05-19 Transient milling temperature testing device capable of following cutter-chip contact wear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110548220.8A CN113210686A (en) 2021-05-19 2021-05-19 Transient milling temperature testing device capable of following cutter-chip contact wear

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Publication Number Publication Date
CN113210686A true CN113210686A (en) 2021-08-06

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Application Number Title Priority Date Filing Date
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Country Status (1)

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