CN113996816B - Real-time acoustic signal monitoring device for selective laser melting process - Google Patents

Real-time acoustic signal monitoring device for selective laser melting process Download PDF

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Publication number
CN113996816B
CN113996816B CN202111232702.9A CN202111232702A CN113996816B CN 113996816 B CN113996816 B CN 113996816B CN 202111232702 A CN202111232702 A CN 202111232702A CN 113996816 B CN113996816 B CN 113996816B
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substrate
acoustic signal
selective laser
laser melting
real
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CN113996816A (en
Inventor
曹龙超
罗舒杨
周奇
胡杰翔
刘华坪
李京昌
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Huazhong University of Science and Technology
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Huazhong University of Science and Technology
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/90—Means for process control, e.g. cameras or sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/20—Direct sintering or melting
    • B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/30—Process control
    • B22F10/31—Calibration of process steps or apparatus settings, e.g. before or during manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/30—Platforms or substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Analytical Chemistry (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

The invention discloses a real-time monitoring device for acoustic signals in a selective laser melting process, which comprises: the device comprises an acoustic signal sensor, an angle adjusting device, a clamping device, a substrate and a substrate height adjusting module; the clamping device is used for clamping the acoustic signal sensor and is connected with one end of the angle adjusting device; the other end of the angle adjusting device is arranged on the substrate and used for adjusting the angle of the acoustic signal sensor; the substrate height adjusting module comprises a servo motor, a differential device, a fixed rod, a connecting rod, a sliding barrel and a sliding rod; one end of the differential device is connected with the servo motor, and the other end of the differential device is connected with the bottom of the substrate; the servo motor is connected with the slide bar in a sliding manner through the connecting rod and the slide cylinder, the differential device is fixedly connected with the slide bar through the fixed rod, and the slide bar is connected with the substrate in a sliding manner. The device not only is convenient to install, but also has the advantages of stability, firmness, wide application range, small limitation, capability of customizing the structure according to the requirements of users and the like, and can provide an effective means for monitoring acoustic signals in the selective laser melting process.

Description

Real-time monitoring device for acoustic signals in selective laser melting process
Technical Field
The invention belongs to the field of additive manufacturing process monitoring, and particularly relates to a real-time monitoring device for an acoustic signal in a selective laser melting process.
Background
Selective laser melting is considered to be one of the most potential metal additive manufacturing techniques. The metal part with a complex internal structure can be directly processed, and the production period is short, so that the metal part has a great application prospect in the aspects of aerospace, medical instruments, industrial manufacturing and the like. However, the selective laser melting process has many parameters, complex process, and difficult control, and often generates defects such as air holes and cracks, which seriously hinders the wide application thereof. In the selective laser melting process, metal powder absorbs laser energy and then is melted and gasified, a molten pool and a small hole are formed, the molten pool and the small hole oscillate, splash and other defects are formed, and the like, so that abundant acoustic signals are contained, the selective laser melting process can be monitored by collecting and processing the acoustic signals through an acoustic signal sensor, and the quality of parts can be improved to a very positive effect.
However, because the selective laser melting is performed in the closed forming cavity, the laser rapidly scans when the equipment is running, the scraper reciprocates, the substrate platform and the powder feeding platform frequently ascend and descend, and the size of the closed forming cavity is limited, the installation and adjustment of the acoustic signal sensor have the following difficulties: (1) The side wall of the processing chamber is smooth, and the position for mounting the acoustic sensor is not reserved, so that the processing chamber is not convenient to disassemble; (2) In order to acquire sufficient acoustic signal information, the installation position, the angle and the height of the acoustic sensor are required to be adjustable so as to adjust the distance, the angle and the height of the acoustic sensor relative to the molten pool; (3) The acoustic signal sensor clamping device is inconvenient to clamp, assemble and disassemble, is not flexible enough, and cannot meet higher use requirements. Therefore, a real-time monitoring device for acoustic signals in the selective laser melting process is needed to monitor acoustic signals in the selective laser melting process in real time.
Disclosure of Invention
Aiming at the defects or the improvement requirements of the prior art, the invention provides a real-time monitoring device for acoustic signals in the selective laser melting process, so that the technical problems of difficult adjustment and control of the installation position, the placement height and the probe angle of an acoustic sensor in the selective laser melting process are solved.
To achieve the above object, according to a first aspect of the present invention, there is provided a device for monitoring acoustic signals of a selective laser melting process in real time, comprising: the device comprises an acoustic signal sensor, an angle adjusting device, a clamping device, a substrate and a substrate height adjusting module;
the clamping device is used for clamping the acoustic signal sensor and is connected with one end of the angle adjusting device;
the other end of the angle adjusting device is arranged on the substrate and is used for adjusting the angle of the acoustic signal sensor;
the substrate height adjusting module comprises a servo motor, a differential device, a fixed rod, a connecting rod, a sliding barrel and a sliding rod; one end of the differential device is connected with the servo motor, and the other end of the differential device is connected with the bottom of the substrate; the servo motor is connected with the sliding rod in a sliding mode through the connecting rod and the sliding barrel, the differential device is fixedly connected with the sliding rod through the fixing rod, and the sliding rod is connected with the substrate in a sliding mode.
Preferably, the differential device comprises an output shaft, a threaded sleeve and an input shaft;
the output shaft is connected with the input shaft through threads; the threaded sleeve is fixedly connected with the output shaft, is connected with the input shaft through threads, and is fixedly connected with the sliding rod through a fixing rod.
Preferably, one end of the differential device is connected with the servo motor through a coupler, and the other end of the differential device is connected with the bottom of the substrate through a screw.
Preferably, the substrate has an array of threaded holes for the placement of one or more acoustic signal sensors.
Preferably, two acoustic signal sensors are placed on the substrate and used for acquiring acoustic signals in the selective laser melting process from the 0 ° direction and the 45 ° direction respectively.
Preferably, the slide bar is connected with the base plate in a sliding mode through a positioning light hole in the base plate.
Preferably, the clamping device adopts screw locking and comprises an internal thread sleeve, a wedge-shaped sleeve and an external thread sleeve.
Preferably, the clamping device is connected with one end of the angle adjusting device through threads.
Preferably, the angle adjusting device comprises a pitching rotating shaft, a support column, a pitching connecting rod and a horizontal rotating shaft;
the pillar is connected to the base plate through threads, the pitching connecting rod is connected with the pillar through a pitching rotating shaft, and the horizontal rotating shaft is connected with the pitching connecting rod.
According to a second aspect of the present invention, there is provided a method for monitoring acoustic signals in real time during selective laser melting, which is applied to the apparatus for monitoring acoustic signals in real time during selective laser melting according to the first aspect, and comprises:
s1: selecting the mounting position of the acoustic signal sensor on the substrate according to the spatial distribution of the selective laser melting equipment;
s2: driving a servo motor to drive a differential device to rotate so as to adjust the height of the substrate, so that the acoustic signal sensor is adjusted to the required height;
s3: adjusting the acoustic signal sensor to a required angle through an angle adjusting device;
s4: and monitoring the acoustic signal in the selective laser melting process in real time through an acoustic signal sensor.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
1. according to the real-time monitoring device for the acoustic signal in the selective laser melting process, the substrate is driven by the substrate height adjusting module to lift along with the processing process, the height of the acoustic signal sensor can be adjusted along with the change of the height of the part along with the processing process, the problem that the collected signal intensity is inconsistent due to the change of the height of the processed part and the change of the angle of the acoustic signal sensor relative to the part is avoided, and real-time and accurate monitoring of the acoustic signal in the whole selective laser melting process is realized. The device not only is convenient to install, but also has the advantages of stability, firmness, wide application range, small limitation, capability of customizing the structure according to the requirements of users and the like, and can provide an effective means for monitoring acoustic signals in the selective laser melting process.
2. According to the device for monitoring the acoustic signal in the selective laser melting process in real time, the differential device adopted by the substrate height adjusting module can finely adjust the height of the substrate, so that the supporting strength is ensured, and the fine adjustment feeding amount is also ensured. Because the restriction of machine tooling, the micron level is hardly accomplished to the screw thread pitch, even can realize, the cost is also very high, and this application adopts differential gear when adjusting the base plate height, and the displacement of base plate is the difference of both ends screw thread pitch to can realize the high accuracy control of base plate height when practicing thrift the cost.
3. The real-time monitoring device for the acoustic signal in the selective laser melting process can be connected with the angle adjusting device through the threaded hole in the position plate, can be fixed at any position of the substrate according to requirements, and collects the acoustic signal in the selective laser melting process from any angle.
4. According to the real-time acoustic signal monitoring device in the selective laser melting process, the clamping device is locked in a spiral mode and comprises the internal thread sleeve, the wedge-shaped sleeve and the external thread sleeve, the wedge-shaped sleeve is arranged between the internal thread sleeve and the thread sleeve, and the wedge-shaped sleeve fixes the cylindrical acoustic signal sensor in the thread tightening process.
5. According to the acoustic signal real-time monitoring device in the selective laser melting process, the substrate height adjusting module further comprises a slide rod connected with the positioning light-operated sliding of the substrate, and the slide rod is used for guiding the substrate in the height adjusting process and can improve the stability of the substrate in the adjusting process.
Drawings
FIG. 1 is a schematic structural diagram of an acoustic signal real-time monitoring device for a selective laser melting process provided by the present invention;
FIG. 2 is a schematic view of an angle adjustment device and a clamping device according to the present invention;
FIG. 3 is a second schematic view of the angle adjustment device and the clamping device according to the present invention;
FIG. 4 is a schematic structural diagram of a height adjustment module according to the present invention;
FIG. 5 is a second schematic structural diagram of a height adjustment module according to the present invention;
fig. 6 is a schematic diagram of a substrate structure provided by the present invention.
The same reference numbers will be used throughout the drawings to refer to the same elements or structures, wherein:
1-a slide bar; 2-a clamping device; 201-an internally threaded sleeve; 202-a wedge sleeve; 203-an externally threaded sleeve; 3-an acoustic signal sensor; 4-angle adjusting means; 401-pitch axis of rotation; 402-a pillar; 403-pitch link; 404-horizontal rotating shaft; 5-a substrate; 501, screwing a hole; 502-positioning an aperture; 6-a differential device; 601-connecting block; 602-a connecting rod; 603-an output shaft; 604-a threaded sleeve; 605-an input shaft; 606-a coupling; 7-a servo motor; 8-a connecting rod; 9-a slide cylinder; 10-fixing the rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the respective embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The embodiment of the invention provides a real-time monitoring device for acoustic signals in a selective laser melting process, which comprises the following components as shown in figure 1: the device comprises an acoustic signal sensor 3, an angle adjusting device 4, a clamping device 2, a substrate 5 and a substrate height adjusting module;
the clamping device 2 is used for clamping the acoustic signal sensor 3 and is connected with one end of the angle adjusting device 4.
In particular, the acoustic signal sensor 3 is mounted on the clamping device 2.
Further, the clamping device adopts screw locking and comprises an internal thread sleeve 201, a wedge-shaped sleeve 202 and an external thread sleeve 203.
Further, the clamping device 2 is connected with one end of the angle adjusting device 4 through threads.
Further, the acoustic signal sensor 3 is cylindrical.
Specifically, as shown in fig. 1 to 3, the clamping device 2 is mounted on the angle adjusting device 4, the acoustic signal sensor 3 passes through the threaded sleeve 201, the wedge-shaped sleeve 202 and the externally threaded sleeve 203 in sequence, and when the threads are tightened, the acoustic signal sensor 3 is clamped firmly.
The clamping device 2 is connected with the angle adjusting device 4 through threads, and the pitch angle and the horizontal angle of the acoustic signal sensor can be adjusted along with the angle adjusting device.
The other end of the angle adjusting device 4 is mounted on the substrate 5, and is used for adjusting the angle of the acoustic signal sensor 3.
The clamping device is installed on the angle adjusting device, the acoustic signal sensor sequentially passes through the threaded sleeve, the wedge-shaped sleeve and the internal threaded sleeve, and after the threads are screwed down, the acoustic signal sensor is clamped firmly. The clamping device is connected with the angle adjusting device through threads, and the pitch angle and the horizontal angle of the acoustic signal sensor can be adjusted along with the angle adjusting device.
Further, the angle adjusting device 4 includes a pitch rotating shaft 401, a pillar 402, a pitch link 403 and a horizontal rotating shaft 404;
the support 402 is screwed to the base plate 5, the pitch link 403 is connected to the support 402 via a pitch rotation shaft 401, and the horizontal rotation shaft 404 is connected to the pitch link 403.
In particular, as shown in fig. 2 to 3, the angle adjustment means 4 is screwed to the base plate 5, i.e. the strut is screwed to the base plate 5.
As shown in fig. 2-3, pitch link 403 may be continuously adjusted and locked in a range of 0 to 90 degrees, and horizontal shaft 404 may be rotated in a horizontal direction by 360 degrees.
The base plate is connected with the base plate height adjusting module through screws.
As shown in fig. 4-5, the substrate height adjusting module comprises a servo motor 7, a differential device 6, a fixing rod 10, a connecting rod 8, a sliding cylinder 9 and a sliding rod 1; one end of the differential device 6 is connected with the servo motor 7, and the other end of the differential device is connected with the bottom of the substrate 5; the servo motor 7 is connected with the slide bar 1 in a sliding mode through a connecting rod 8 and a sliding barrel 9, the differential device is fixedly connected with the slide bar 1 through a fixing rod 10, and the slide bar is connected with the base plate in a sliding mode.
Specifically, the substrate height adjusting module is used for adjusting the height of the substrate 5; one end of the differential device 6 is connected with the servo motor 7, and the other end is connected with the bottom of the substrate 5. One end of the sliding rod is connected with the substrate in a sliding mode, and the other end of the sliding rod is fixed; the servo motor is connected with the slide bar in a sliding way through a connecting rod and a slide cylinder and is used for limiting the rotary motion of the shell of the servo motor 7, and the servo motor 7 can move upwards or downwards under the guidance of the slide bar; the threaded sleeve 604 of the differential device is fixedly connected with the slide bar 1 through a fixed rod 10, and is used for limiting the movement and rotation of the threaded sleeve 604. One end of the connecting rod 8 is fixedly connected with the servo motor 7, and the other end of the connecting rod is fixedly connected with the sliding barrel 9. One end of the fixed rod 10 is fixedly connected with a threaded sleeve 604 of the differential device, and the other end is fixedly connected with the sliding rod 1.
Further, as shown in fig. 4 to 5, the height adjustment module further includes a connection block 601 and a connection rod 602, and the height adjustment module is connected to the base plate through the connection block 601.
Further, the differential device 6 includes an output shaft 603, a threaded sleeve 604, and an input shaft 605;
the output shaft 603 is connected with the input shaft 605 through threads; the threaded sleeve 604 is fixedly connected with the output shaft 603, is connected with the input shaft 605 through threads, and is fixedly connected with the sliding rod 1 through the fixed rod 10.
Two ends of the connecting rod 602 are respectively connected with the connecting block 601 and the output shaft 603 for connection.
Specifically, the upper and lower threads of the input shaft 605 have opposite spiral directions, that is, the upper end of the input shaft is connected to the output shaft through a first thread, the lower end of the input shaft is connected to the threaded sleeve through a second thread, and the spiral directions of the first thread and the second thread are opposite. Preferably, the difference in pitch between the first and second threads is 0.1mm.
The threaded sleeve 604 is connected with the output shaft 603 in a sliding mode, the input shaft 605 is connected with the input shaft 605 through a second thread, the input shaft 605 is connected with the output shaft 603 through a first thread, internal threads are machined on the output shaft 603, the spiral direction of the internal threads is opposite to that of the threads on the threaded sleeve 604, and the thread pitch difference is 0.1mm. The input shaft 605 has two sections of threads, the direction of the first thread at the upper end is the same as the direction of the thread on the output shaft 603, the direction of the second thread at the lower end is the same as the direction of the thread on the threaded sleeve 604, and the difference between the thread pitches of the upper and lower sections of threads is 0.1mm. The input shaft, the threaded sleeve and the output shaft work together to realize differential motion. Specifically, because the output shaft 605 is connected with the threaded sleeve 604 through threads, the threaded sleeve 604 is fixedly connected with the sliding rod 1 through the fixing rod 10, when the input shaft 605 is driven by the servo motor 7 to rotate clockwise, the input shaft 605 rises a certain height in the threaded sleeve 604, and meanwhile, because the thread directions are opposite, the output shaft falls a certain height, thereby realizing the differential motion, namely the actual displacement of the substrate is the difference between the rising height of the input shaft 605 and the falling height of the output shaft 603; conversely, when the input shaft 605 is rotated counterclockwise by the servo motor 7, the actual displacement of the substrate is the difference between the height at which the input shaft 605 is lowered and the height at which the output shaft 603 is raised.
It is understood that the moving direction (upward or downward) of the substrate is related to the rotating direction (clockwise or counterclockwise) of the input shaft driven by the servo motor, the specific rotating directions of the first thread and the second thread of the input shaft and the internal thread of the output shaft, and the substrate can move upward or downward when the input shaft rotates clockwise driven by the servo motor through corresponding arrangement.
Further, the threaded sleeve 604 is fixedly connected with the sliding rod 1 through a fixing rod 10, and is used for limiting the movement and rotation of the threaded sleeve 604. The servo motor 7 is connected with the slide bar 1 in a sliding way through a connecting rod 8 and a slide cylinder 9 and is used for limiting the rotary motion of the shell of the servo motor 7; since the motor is connected with the input shaft through the coupler, when the input shaft moves up or down in the threaded sleeve, the servo motor 7 moves up or down under the guidance of the connecting rod and the sliding barrel.
Because the restriction of machine tooling, the micron level is hardly accomplished to the screw thread pitch, even can realize, the cost is also very high, and this application adopts differential gear when adjusting the base plate height, and the displacement of base plate is the difference of both ends screw thread pitch to can realize the high accuracy control of base plate height when practicing thrift the cost.
Furthermore, one end of the differential device 6 is connected to the servo motor 7 through a coupling 606, and the other end is connected to the bottom of the substrate 5 through a screw.
Specifically, the substrate 5 is connected to the substrate height adjusting module by screws. One end of the differential device 6 is connected with the servo motor 7 through a coupler, and the other end of the differential device is fixedly connected with the substrate 5 so as to drive the substrate 5 to lift along with the machining process under the driving of the motor.
Further, the base plate 5 has an array of threaded holes 501 for placing one or more acoustic signal sensors 3.
Further, the slide bar 1 is slidably connected with the base plate 5 through a positioning light hole 502.
Specifically, as shown in fig. 6, the mounting substrate 5 is processed with an array of threaded holes 501 and positioning optical holes 502. Wherein, the threaded through hole array is used for installing a support frame, namely a strut 402, so as to adjust the position of the sensor and install a plurality of sensors to form an acoustic signal sensor array; the positioning light hole 502 is used for forming sliding fit with the sliding rod 1, and the sliding rod 1 is used for guiding in the process of adjusting the substrate up and down, so that the stability of the substrate in the adjusting process is enhanced.
Preferably, 36 threaded through-hole arrays 501 are processed on the mounting substrate 5, and 4 positioning light holes 502 are processed at 4 corners of the mounting substrate.
Further, two acoustic signal sensors are placed on the substrate and used for acquiring acoustic signals in the selective laser melting process from the 0-degree direction and the 45-degree direction respectively.
Specifically, two acoustic signal sensors 3 are arranged on the clamping device 2, and respectively collect acoustic signals of the selective laser melting process from the 0-degree direction and the 45-degree direction so as to extract characteristic acoustic signals of the comprehensive machining process.
It can be understood that the acoustic signal sensor collects the acoustic signal of the melting process of the laser selection area from the 0-degree direction, namely the acoustic signal sensor is parallel to the upper surface of the molten pool; the acoustic signal sensor collects acoustic signals of the selective laser melting process from the 45-degree direction, namely the acoustic signal sensor forms an elevation angle of 45 degrees with the upper surface of the molten pool.
The invention provides a method for monitoring acoustic signals in real time in a selective laser melting process, which is applied to a device for monitoring acoustic signals in real time in the selective laser melting process in any embodiment and comprises the following steps:
s1: selecting the mounting position of the acoustic signal sensor on the substrate according to the spatial distribution of the selective laser melting equipment;
s2: driving a servo motor to drive a differential device to rotate so as to adjust the height of the substrate, so that the acoustic signal sensor is adjusted to the required height;
s3: adjusting the acoustic signal sensor to a required angle through an angle adjusting device;
s4: and monitoring the acoustic signal in the selective laser melting process in real time through an acoustic signal sensor.
The invention provides a real-time acoustic signal monitoring device for selective laser melting, which comprises the following specific using processes:
before clamping the acoustic signal sensors, selecting a proper position to install the substrate according to the spatial distribution of the selective laser melting equipment, clamping the acoustic signal sensors on the clamping device, driving a servo motor according to the height requirement of the acoustic sensors to drive a differential device to rotate, enabling the installation substrate to move upwards or downwards and adjust to a proper height, adjusting an angle adjusting device to enable the angles of the two acoustic signal sensors to be respectively in the horizontal direction and the 45-degree direction downwards, and aligning the position of a molten pool to monitor the acoustic signals in the laser zone melting process.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (6)

1. A real-time monitoring device for acoustic signals in a selective laser melting process is characterized by comprising: the device comprises an acoustic signal sensor (3), an angle adjusting device (4), a clamping device (2), a substrate (5) and a substrate height adjusting module;
the clamping device (2) is used for clamping the acoustic signal sensor (3) and is connected with one end of the angle adjusting device (4);
the other end of the angle adjusting device (4) is arranged on the substrate (5) and used for adjusting the angle of the acoustic signal sensor (3);
the substrate height adjusting module comprises a servo motor (7), a differential device (6), a fixed rod (10), a connecting rod (8), a sliding cylinder (9) and a sliding rod (1); one end of the differential device (6) is connected with the servo motor (7), and the other end of the differential device is connected with the bottom of the substrate (5); the servo motor (7) is connected with the slide bar (1) in a sliding manner through a connecting rod (8) and a sliding barrel (9), the differential device is fixedly connected with the slide bar (1) through a fixed rod (10), and the slide bar is connected with the substrate in a sliding manner;
the differential device (6) comprises an output shaft (603), a threaded sleeve (604) and an input shaft (605);
the output shaft (603) is connected with the input shaft (605) through threads; the threaded sleeve (604) is fixedly connected with the output shaft (603), is connected with the input shaft (605) through threads, and is fixedly connected with the sliding rod (1) through a fixed rod (10); one end of the differential device (6) is connected with the servo motor (7) through a coupler (606), and the other end of the differential device is connected with the bottom of the substrate (5) through a screw; the upper end of the input shaft is connected with the output shaft through a first thread, the lower end of the input shaft is connected with the threaded sleeve through a second thread, the spiral directions of the first thread and the second thread are opposite, and the thread pitch difference is 0.1mm;
the base plate (5) is provided with an array of threaded holes (501) for placing one or more acoustic signal sensors (3);
the clamping device adopts screw locking and comprises an internal thread sleeve (201), a wedge-shaped sleeve (202) and an external thread sleeve (203).
2. The device for real-time monitoring of acoustic signals during selective laser melting according to claim 1, wherein two acoustic signal sensors are disposed on the substrate for acquiring acoustic signals during selective laser melting from 0 ° and 45 ° directions, respectively.
3. The device for real-time monitoring of acoustic signals during selective laser melting according to claim 1, wherein the slide bar (1) is slidably connected to the base plate (5) through a positioning optical hole (502).
4. The device for real-time monitoring of acoustic signals during selective laser melting according to claim 1, characterized in that the holding device (2) is screwed to one end of the angle adjusting device (4).
5. The device for monitoring acoustic signals of selective laser melting process in real time as claimed in claim 1, wherein the angle adjusting means (4) comprises a pitch rotating shaft (401), a support column (402), a pitch connecting rod (403) and a horizontal rotating shaft (404);
the supporting column (402) is connected to the base plate (5) through threads, the pitching connecting rod (403) is connected with the supporting column (402) through a pitching rotating shaft (401), and the horizontal rotating shaft (404) is connected with the pitching connecting rod (403).
6. A method for monitoring acoustic signals of selective laser melting process in real time, which is applied to the acoustic signals real-time monitoring device of selective laser melting process as claimed in any one of claims 1-5, and comprises:
s1: selecting the mounting positions of the acoustic signal sensors on the substrate according to the spatial distribution of the selective laser melting equipment;
s2: driving a servo motor to drive a differential device to rotate so as to adjust the height of the substrate, so as to adjust the acoustic signal sensor to the required height;
s3: adjusting the acoustic signal sensor to a required angle through an angle adjusting device;
s4: and monitoring the acoustic signal of the selective laser melting process in real time through an acoustic signal sensor.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201257559Y (en) * 2008-09-17 2009-06-17 成都豪能科技股份有限公司 Location device for linear cutting and paring machine
CN110253019A (en) * 2019-07-25 2019-09-20 阳江市五金刀剪产业技术研究院 A kind of quality monitoring and control method of selective laser fusing
CN209978807U (en) * 2019-07-08 2020-01-21 上汽依维柯红岩商用车有限公司 Tool for clamping differential transformer type displacement sensor
CN111118758A (en) * 2018-10-31 2020-05-08 拓卡奔马机电科技有限公司 Needle and shuttle cooperation automatic regulating mechanism and sewing machine
CN213714327U (en) * 2021-01-06 2021-07-16 陈菲 Surveying and mapping flat instrument

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700052877A1 (en) * 2017-05-16 2018-11-16 Starfort Des Stubenruss Moritz A 3D printer head for use in a 3D printer with a 3D printer head of this type, a method for operating a 3D printer of this type and a printed product made with a 3D printer of this type

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201257559Y (en) * 2008-09-17 2009-06-17 成都豪能科技股份有限公司 Location device for linear cutting and paring machine
CN111118758A (en) * 2018-10-31 2020-05-08 拓卡奔马机电科技有限公司 Needle and shuttle cooperation automatic regulating mechanism and sewing machine
CN209978807U (en) * 2019-07-08 2020-01-21 上汽依维柯红岩商用车有限公司 Tool for clamping differential transformer type displacement sensor
CN110253019A (en) * 2019-07-25 2019-09-20 阳江市五金刀剪产业技术研究院 A kind of quality monitoring and control method of selective laser fusing
CN213714327U (en) * 2021-01-06 2021-07-16 陈菲 Surveying and mapping flat instrument

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