CN213052896U - Milling system - Google Patents
Milling system Download PDFInfo
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- CN213052896U CN213052896U CN202021691477.6U CN202021691477U CN213052896U CN 213052896 U CN213052896 U CN 213052896U CN 202021691477 U CN202021691477 U CN 202021691477U CN 213052896 U CN213052896 U CN 213052896U
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- acoustic emission
- milling
- milling system
- cutter
- tool
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- 238000003801 milling Methods 0.000 title claims abstract description 74
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 24
- 239000002131 composite material Substances 0.000 claims abstract description 24
- 239000011159 matrix material Substances 0.000 claims abstract description 16
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000003754 machining Methods 0.000 claims description 23
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 19
- 239000002245 particle Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000004513 sizing Methods 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model provides a milling system, milling system includes: the milling machine is provided with a human-computer interface, and the human-computer interface is used for inputting processing parameters so as to process a workpiece containing the high-volume silicon carbide particle-aluminum matrix composite; the converter is arranged on a processed workpiece and used for collecting elastic waves generated by vibration of the processed workpiece and converting the elastic waves into electric signals to be output; the acoustic emission instrument is connected with the converter and is used for receiving the electric signal, amplifying, processing, analyzing and storing the electric signal; and the computer is connected with the acoustic emission instrument and used for receiving the stored data in the acoustic emission instrument and displaying the stored data. The system can replace the cutter in time, so that the cutter in the milling machine always keeps better cutting performance, the processing quality and efficiency are further improved, and the processing cost is reduced.
Description
Technical Field
The utility model relates to a numerically controlled fraise machine technical field especially relates to a milling process system.
Background
The high volume fraction silicon carbide particle aluminum matrix composite (SiCp/Al) has the characteristics of high specific strength, high specific stiffness, high temperature resistance, wear resistance, small and adjustable linear expansion coefficient, good size stability and the like, so that the high volume fraction silicon carbide particle aluminum matrix composite is widely applied to the fields of aerospace, aviation, automobiles, electronics, military and the like. The SiCp particles act as a reinforcing phase, and although very high hardness and wear resistance can be imparted to the aluminum matrix composite, the high hardness and wear resistance further contribute to increased processing difficulty.
At present, the processing of the SiCp/Al aluminum-based composite material is still mainly carried out by a conventional mechanical cutting processing mode (numerical control milling processing). During processing, the SiCp/Al aluminum matrix composite is processed by combining the working experience of workers and the traditional process parameters.
However, in the above-mentioned machining process, if the tool is changed too early, the tool does not reach the cutting limit, which increases the machining cost; if the tool is changed too late, the tool is seriously abraded and even broken, so that the surface processing quality and the processing efficiency of the SiCp/Al aluminum-based composite material are reduced; thereby seriously restricting the popularization and the application of the SiCp/Al aluminum matrix composite material.
SUMMERY OF THE UTILITY MODEL
In view of the above technical problem, the utility model aims at providing a milling system, through the cutting extreme state that this system can the on-line monitoring cutter, the cutter is changed to the science, makes the cutter in the milling machine keep better cutting performance always, and then improves processingquality and efficiency to reduce the processing cost.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a first aspect of the present invention provides a milling system, the milling system includes:
the milling machine is provided with a human-computer interface, and the human-computer interface is used for inputting processing parameters so as to process a workpiece containing the high-volume silicon carbide particle-aluminum matrix composite;
the converter is arranged on a processed workpiece and used for collecting elastic waves generated by vibration of the processed workpiece and converting the elastic waves into electric signals to be output;
the acoustic emission instrument is connected with the converter and is used for receiving the electric signal, amplifying, processing, analyzing and storing the electric signal;
and the computer is connected with the acoustic emission instrument and used for receiving the stored data in the acoustic emission instrument and displaying the stored data.
As an optional implementation manner, in the milling system provided by the present invention, the converter is an AE sensor.
As an optional implementation manner, in the milling system provided by the present invention, the model of the acoustic emission instrument is PCI-2.
As an optional implementation manner, in the milling system provided by the present invention, Labview software is installed in the computer.
As an optional implementation manner, in the milling system provided by the present invention, the processing parameters include a milling cutter rotation speed, a cutting depth and a feeding speed.
As an optional implementation manner, in the milling system provided by the present invention, the milling machine employs a PCD or CBN tool.
As an optional implementation manner, in the milling system provided in the present invention, the rotation speed during the PCD cutting tool machining is greater than the rotation speed during the CBN cutting tool machining, the cutting depth during the PCD cutting tool machining is smaller than the cutting depth during the CBN cutting tool machining, and the feeding speed during the PCD cutting tool machining is greater than the feeding speed during the CBN cutting tool machining.
As an optional implementation manner, in the milling system provided by the present invention, the milling machine employs a PCD cutter.
As an optional implementation manner, in the milling system provided in the present invention, the converter is connected to the acoustic emission instrument by a wire, and the computer is connected to the acoustic emission instrument by a wire.
As an optional implementation manner, in the milling system provided by the present invention, the model of the milling machine is MVC 650.
The utility model provides a milling system, which comprises a milling machine, a converter, an acoustic emission instrument and a computer; the milling machine is provided with a human-computer interface, and the human-computer interface is used for inputting processing parameters to process a workpiece containing the high-volume silicon carbide particle-aluminum matrix composite; the converter is arranged on a processed workpiece and is used for collecting elastic waves generated by vibration of the workpiece during processing and converting the elastic waves into electric signals to be output; the acoustic emission instrument is connected with the converter and is used for receiving the electric signal, amplifying, processing, analyzing and storing the electric signal; and the computer is connected with the acoustic emission instrument and is used for receiving the stored data in the acoustic emission instrument and displaying the stored data. The system can monitor the cutting limit state of the cutter on line by displaying the data processed by the acoustic emission instrument through the computer, scientifically replace the cutter, enable the cutter in the milling machine to keep better cutting performance all the time, further improve the processing quality and efficiency and reduce the processing cost.
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 described 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 inventive labor.
Fig. 1 is a schematic structural diagram of a milling machine processing system provided by the present invention;
fig. 2 is a graph showing the energy change of the CBN tool provided by the embodiment of the present invention in the machining process;
fig. 3 is a graph showing an energy change of a PCD cutter provided in embodiment 2 of the present invention during a machining process.
Description of reference numerals:
11-a workbench;
12-a workpiece;
13-a milling cutter;
14-flat tongs;
15-sizing block;
20-a converter;
30-acoustic emission instrument;
40-a computer;
50-a first data line;
60-second data line.
Detailed Description
First of all, it should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be adjusted as needed by those skilled in the art to suit particular applications.
Next, it should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "inside", "outside", and the like are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that a device or member must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Furthermore, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The high volume fraction silicon carbide particle aluminum matrix composite (SiCp/Al) has the characteristics of high specific strength, high specific stiffness, high temperature resistance, wear resistance, small and adjustable linear expansion coefficient, good size stability and the like, so that the high volume fraction silicon carbide particle aluminum matrix composite is widely applied to the fields of aerospace, aviation, automobiles, electronics, military and the like. The SiCp particles act as a reinforcing phase, and although very high hardness and wear resistance can be imparted to the aluminum matrix composite, the high hardness and wear resistance further contribute to increased processing difficulty. At present, the processing of the SiCp/Al aluminum-based composite material is still mainly carried out by a conventional mechanical cutting processing mode. During processing, the SiCp/Al aluminum matrix composite is processed by combining the working experience of workers and the traditional process parameters. However, in the above-mentioned machining process, if the tool is changed too early, the tool does not reach the cutting limit, which increases the machining cost; if the tool is changed too late, the tool is seriously abraded and even broken, so that the surface processing quality and the processing efficiency of the SiCp/Al aluminum-based composite material are reduced; thereby seriously restricting the popularization and the application of the SiCp/Al aluminum matrix composite material.
For solving the technical problem, the utility model provides a milling system, the data that this system was handled through the computer display acoustic emission appearance can the cutting extreme state of on-line monitoring cutter, and the cutter is changed to the science, makes the cutter in the milling machine keep better cutting performance always, and then improves processingquality and efficiency to reduce the processing cost.
As shown in FIG. 1, the milling system includes a milling machine, a transducer 20, an acoustic emission instrument 30, and a computer 40.
Among them, the milling cutter 13 for milling machine machines various surfaces of the workpiece 12 containing the high-volume silicon carbide particle-aluminum matrix composite, and usually the rotation motion of the milling cutter 13 is the main motion, and the movement of the workpiece and the milling cutter 13 is the feed motion. In the embodiment, machining parameters such as the rotation speed, cutting depth, feed speed and the like of the milling cutter are input through a human-computer interface on the milling machine, so that a plane and a groove can be machined, and various curved surfaces, gears and the like can also be machined.
In the present embodiment, the type of the milling machine is not particularly limited, and may be a type of a milling machine commonly used by those skilled in the art. In some alternative embodiments, the milling machine is model number MVC 650.
The utility model provides an among the milling process system, converter 20 installs on the work piece 12 of being processed, and the concrete position of installation is not specially limited, as long as can gather by the produced elastic wave of work piece 12 vibration of being processed can, gather the elastic wave and can be converted into the signal of telecommunication and export by the converter.
In some alternative embodiments, the transducer 20 is mounted on the upper surface of the workpiece 12, near the edge.
Further, in some alternative embodiments, the transducer 20 is an acoustic emission sensor, which may also be referred to as an AE sensor.
The AE sensor converts the collected elastic waves into electrical signals, and transmits the electrical signals to the acoustic emission device 30 connected thereto. The acoustic emission instrument 30 receives the electric signal, amplifies the electric signal, processes and analyzes the electric signal, and stores the processed and analyzed data. The data after processing and analysis can be used as energy fluctuation data of the milling cutter 13 in the process of processing the workpiece 12, and when the cutter has strong processing capacity on materials, an energy curve is stable; when the machining capability of the tool on the material is weak, the energy change curve shows a very obvious discrete fluctuation phenomenon. In addition, if the time of the initial yield plateau period of the energy change curve is shorter, the processing capacity of the tool is poorer; if the secondary yield plateau lasts for a longer time and occurs for a longer time, the better the machining performance of the tool is. When the cutter passes through the two yield plateau periods, the cutting performance is deteriorated, the acoustic emission signal does not have obvious energy fluctuation any more, namely, the cutter reaches the limit service life, and at the moment, the cutter is replaced immediately.
In some alternative embodiments, the acoustic emission instrument may be a PCI-2 model acoustic emission system, manufactured by Acoustics, USA.
The acoustic emission system can transmit the stored data to the computer, the received data is displayed through Labview software configured on the computer, the cutting limit state of the cutter can be monitored on line through the displayed data, the cutter can be replaced in time, the cutter on the milling machine can keep good cutting performance all the time, the processing quality and the processing efficiency are further improved, and meanwhile, the processing cost is also reduced.
In the present embodiment, the connection between the transducer 20 and the acoustic emission instrument 30 and the connection between the acoustic emission instrument 30 and the computer 40 are not particularly limited as long as the electrical signals and the stored data can be transmitted to the acoustic emission instrument 30 and the computer 40. For example, the connection mode may be wired connection or wireless connection.
In some alternative embodiments, converter 20 is coupled to acoustic emission instrument 30 via a first data line 50, and acoustic emission instrument 30 is coupled to computer 40 via a second data line 60.
The applicant has found experimentally that the use of diamond (PCD) or Cubic Boron Nitride (CBN) cutters can further improve the machining performance when machining workpieces comprising aluminium-based composites, in particular SiCp/Al aluminium-based composites. Further, PCD cutters are preferred.
In addition, the rotational speed, depth of cut and feed rate of the milling cutter also affect the machining performance. In the embodiment, the rotation speed of the milling cutter is 2500r/min-3000r/min, the cutting depth is 0.3mm-0.5mm, and the feeding speed is 200mm/min-300 mm/min.
The utility model provides a milling process system's use as follows:
1) starting the milling machine;
2) clamping a tool shank of a tool by using a spring chuck, and then installing the tool shank on a main shaft of a milling machine;
3) placing and calibrating a flat-nose pliers 14 on a clean workbench 11, installing a sizing block 15 in the flat-nose pliers 14, and placing a workpiece 12 containing high-volume silicon carbide particle aluminum matrix composite on the sizing block 15;
4) adhering the transducer 20 to a surface of the workpiece 12 that is not to be machined and connecting the transducer 20 to the acoustic emission apparatus 30 via a first data line 50, while the acoustic emission apparatus 30 is connected to the computer 40 via a second data line 60;
5) setting the coordinates and the tool compensation of the workpiece 12, inputting through a human-computer interface, and starting machining; in the processing process, the cutter is replaced in time according to the data displayed by the computer;
6) and after the machining is finished, taking out the workpiece and closing the milling machine.
The effect of the above system under different tool and machining parameters will be described in detail by the following embodiments.
Example 1
In the embodiment, a CBN cutter is adopted, the feeding speed is 200mm/min, and the cutting depth is 0.5 mm.
As shown in fig. 2, under the condition that the feeding speed and the cutting depth are kept unchanged, the AE sensor acquires acoustic emission signals when the high-volume SiCp/Al aluminum-based composite material is milled at different milling cutter rotating speeds, and the acoustic emission signals are processed and analyzed by an acoustic emission system to form the energy change curve graph of the cutter in fig. 2.
As can be seen from FIG. 2, with the increase of the rotation speed of the milling cutter, the signals fed back by the acoustic emission system all show the characteristic of obvious yield, which shows that the CBN cutter has better adaptability for processing SiCp/Al materials. When the rotating speed is low, the vibration energy amplitude is directly increased to a higher level, which indicates that the efficiency of the cutter is not exerted to the limit. When the rotating speed is 2500r/min, the signal discrete characteristics fed back by the acoustic emission signals are stable, which shows that the cutting processing condition is better and the service life of the cutter is longest; when the rotating speed exceeds 3000r/min, the yield plateau period is shortened, the abrasion of the cutter is accelerated, and the service life is shortened.
Example 2
In the embodiment, a PCD cutter is adopted, the feeding speed is 300mm/min, and the rotating speed of a milling cutter is 3000 r/min.
As shown in fig. 3, under the condition that the feeding speed and the rotation speed of the milling cutter are kept unchanged, the AE sensor obtains acoustic emission signals when milling the high-volume SiCp/Al aluminum-based composite material under the parameters of different cutting depths, and the acoustic emission signals are processed and analyzed by the acoustic emission system to form an energy change curve chart of the cutter in fig. 3.
As can be seen from fig. 3, even at higher rotational and feed rates, the frequency of vibration energy bounce is significantly less than for the CBN tool described above; when the processing depth is gradually increased, the bounce phenomenon of the vibration energy is slightly increased, which shows that the PCD cutter shows good processing performance in the processing process of the high-volume-fraction SiC/Al material. When the cutting depth is 0.3mm, a good yield plateau period is always kept in the machining process, and large jump does not occur. Therefore, the PCD cutter can achieve the best processing performance when the PCD cutter is processed at a high rotating speed, a high feeding speed and a small cutting depth, namely, the rotating speed of a milling cutter is 3000r/min, the cutting depth is 0.3mm, and the feeding speed is 300 mm/min.
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; although the present invention has been described in detail with reference to the foregoing embodiments, it should 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; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A milling system, comprising:
the milling machine is provided with a human-computer interface, and the human-computer interface is used for inputting processing parameters so as to process a workpiece containing the high-volume silicon carbide particle-aluminum matrix composite;
the converter is arranged on a processed workpiece and used for collecting elastic waves generated by vibration of the processed workpiece and converting the elastic waves into electric signals to be output;
the acoustic emission instrument is connected with the converter and is used for receiving the electric signal, amplifying, processing, analyzing and storing the electric signal;
and the computer is connected with the acoustic emission instrument and used for receiving the stored data in the acoustic emission instrument and displaying the stored data.
2. The milling system of claim 1 wherein the transducer is an AE sensor.
3. The milling system of claim 2 wherein the acoustic emission instrument is a PCI-2 model.
4. The milling system of claim 3 wherein the computer has Labview software installed therein.
5. The milling system of claim 1 wherein the machining parameters include mill rotation speed, depth of cut, and feed speed.
6. The milling system of claim 5 wherein the milling machine employs PCD or CBN cutters.
7. The milling system according to claim 6, wherein the rotational speed at which the PCD tool is machined is higher than the rotational speed at which the CBN tool is machined, the depth of cut at which the PCD tool is machined is smaller than the depth of cut at which the CBN tool is machined, and the feed speed at which the PCD tool is machined is higher than the feed speed at which the CBN tool is machined.
8. The milling system of claim 6 wherein the milling machine employs PCD cutters.
9. The milling system of claim 1 wherein the transducer is wired to the acoustic emission device and the computer is wired to the acoustic emission device.
10. The milling system of any one of claims 1 to 9, wherein the milling machine is of the model MVC 650.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021691477.6U CN213052896U (en) | 2020-08-14 | 2020-08-14 | Milling system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021691477.6U CN213052896U (en) | 2020-08-14 | 2020-08-14 | Milling system |
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| CN213052896U true CN213052896U (en) | 2021-04-27 |
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| CN202021691477.6U Expired - Fee Related CN213052896U (en) | 2020-08-14 | 2020-08-14 | Milling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114799495A (en) * | 2021-12-28 | 2022-07-29 | 华中科技大学 | Control method and related device for laser cutting |
-
2020
- 2020-08-14 CN CN202021691477.6U patent/CN213052896U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114799495A (en) * | 2021-12-28 | 2022-07-29 | 华中科技大学 | Control method and related device for laser cutting |
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