CN117418100A - Micro-forging device for stroke monitoring - Google Patents

Micro-forging device for stroke monitoring Download PDF

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Publication number
CN117418100A
CN117418100A CN202311177445.2A CN202311177445A CN117418100A CN 117418100 A CN117418100 A CN 117418100A CN 202311177445 A CN202311177445 A CN 202311177445A CN 117418100 A CN117418100 A CN 117418100A
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CN
China
Prior art keywords
stroke
micro
displacement sensor
impact rod
shell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311177445.2A
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Chinese (zh)
Inventor
沈彬
方增
刘启
王成瀚
陈苏琳
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Shanghai Jiaotong University
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Shanghai Jiaotong University
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Application filed by Shanghai Jiaotong University filed Critical Shanghai Jiaotong University
Priority to CN202311177445.2A priority Critical patent/CN117418100A/en
Publication of CN117418100A publication Critical patent/CN117418100A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D11/00—Process control or regulation for heat treatments
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
    • C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

The invention provides an electromagnetic driving type micro-forging device for stroke monitoring, which relates to the technical field of micro-forging monitoring equipment and comprises a permanent magnet fixedly arranged relative to a shell; one end of the impact rod extends into the shell and is fixedly connected with the magnetic yoke, the coil is wound on the magnetic yoke, and the other end of the impact rod extends out of the shell; one side of the impact rod extending out of the shell is fixedly connected with the stroke measuring boss, the tail end of the impact rod extending out of the shell is detachably and fixedly connected with the micro forging head, and the laser displacement sensor is fixedly arranged on the outer wall of the shell; the emergent light of the laser displacement sensor and the central axis of the impact rod form an acute angle, and the emergent light of the laser displacement sensor is mutually perpendicular to the measuring surface of the stroke measuring boss. The laser displacement sensor measures the displacement of the measuring surface perpendicular to the measuring surface on the stroke measuring boss in real time, and then calculates the stroke of the impact rod through the included angle between the emergent light of the laser displacement sensor and the axial direction of the impact rod, so that the stroke of the micro-forging device is detected, and the micro-forging device is compact in structure and high in precision.

Description

Micro-forging device for stroke monitoring
Technical Field
The invention relates to the technical field of micro-forging monitoring equipment, in particular to a micro-forging device for stroke monitoring.
Background
Micro forging is an emerging mechanical surface modification process involving hammering a target area with a high-frequency oscillating high-hardness hammer head. The electromagnetic driving type micro forging is a micro forging device which is widely applied, the driving device consists of magnetic poles, electromagnetic coils and the like, the impact structure, namely the forging head and the impact rod, perform reciprocating linear motion between the limiting block and the surface of a workpiece under the excitation of an electromagnetic driving system, and after the material bears the continuous impact of protons, strong plastic deformation occurs, and the surface integrity of the material can be improved through certain plastic deformation. The micro forging device is generally arranged at the tail end of a machine tool or a mechanical arm through a mechanical interface, technological parameters such as stroke, step distance, row distance, impact angle and the like are adjusted, and a constant distance is kept between a micro forging head and the surface of a workpiece all the time in the machining process, so that the workpiece material is ensured to be impacted accurately in position and uniformly in strength. The surface finishing or strengthening of the workpieces of different metal materials is realized by precise high-frequency impact.
The prior Chinese patent application publication No. CN113862459B discloses a high-frequency electric pulse auxiliary surface micro-forging device, which comprises: pulse generation device and electromagnetism micro-forging device, wherein: the pulse generating device provides high-energy current between the micro forging punch head of the electromagnetic micro forging device and the workpiece, and improves the micro forging process effect by utilizing the electro-plastic effect.
The micro forging is a controllable and orderly surface strengthening process, the micro forging stroke is used as a key variable for controlling the impact force and the impact speed of the forging head, and is a key factor for determining the micro forging strengthening effect, and the on-line monitoring of the micro forging stroke can obtain the actual strengthening effect of each micro forging through the real stroke amplitude, thereby being beneficial to improving the accuracy and consistency of the micro forging process.
At present, the electromagnetic micro-forging process monitoring system has few researches, and an online monitoring system special for the micro-forging process is not available, wherein the micro-forging stroke is given only in the process design stage, and the stroke monitoring means are lacked in the actual processing, so that the actual strengthening effect of the micro-forging cannot be effectively evaluated.
Disclosure of Invention
In view of the drawbacks of the prior art, an object of the present invention is to provide a stroke monitoring micro-forging device.
The invention provides a micro-forging device for stroke monitoring, which comprises a stroke measurement boss, a laser displacement sensor, a displacement sensor connecting module, an impact rod, a permanent magnet, an air-cooling interface, a magnetic yoke, a coil, a shell and a micro-forging head, wherein the permanent magnet is fixedly arranged relative to the shell; one end of the impact rod extends into the shell and is fixedly connected with the magnetic yoke, the coil is wound on the magnetic yoke, the other end of the impact rod extends out of the shell, and the impact rod is in sliding fit with the shell; one side of the impact rod extending out of the shell is fixedly connected with the stroke measurement boss, the tail end of the impact rod extending out of the shell is detachably and fixedly connected with the micro forging head, and the laser displacement sensor is fixedly arranged on the outer wall of the shell; the outgoing light of the laser displacement sensor and the central axis of the impact rod form an acute angle, and the outgoing light of the laser displacement sensor is perpendicular to the measuring surface of the stroke measuring boss.
Preferably, the stroke s of the micro forging device satisfies the following relation: s=h/sina; and h represents the displacement of the measuring surface of the stroke measuring boss relative to the laser displacement sensor, and a is an acute angle included between the emergent light of the laser displacement sensor and the central axis of the impact rod.
Preferably, the acute angle between the emergent light of the laser displacement sensor and the central axis of the impact rod is 45 degrees.
Preferably, the laser displacement sensor is fixedly connected to the outer wall of the shell through the matching of the connecting piece and the displacement sensor connecting module.
Preferably, the micro forging head is in threaded connection with one end of the impact rod penetrating through the magnetic yoke.
Preferably, an impact rod is arranged in the shell, the impact rod is fixedly connected with the magnetic yoke and the coil, a gap exists between the coil and a permanent magnet fixedly connected with the shell, and the impact rod is in sliding fit with the inner wall of the shell.
Preferably, an air-cooled interface is also included for cooling the coil.
Preferably, the stroke zero point is the retraction state of the impact rod, and the laser displacement sensor acquires the displacement of the measuring surface of the stroke measuring boss relative to the laser displacement sensor in real time.
Preferably, the system further comprises a processing system, wherein the processing system acquires information acquired by the laser displacement sensor and calculates according to the following formula:
s＝h/sina；
the displacement of the measuring surface of the h-stroke measuring boss relative to the laser displacement sensor is that a is an acute angle included angle between emergent light of the laser displacement sensor and the central axis of the impact rod.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the laser displacement sensor fixedly arranged on the outer wall of the shell is used for measuring the displacement of the measuring surface which is mutually perpendicular to the stroke measuring boss fixedly connected with the impact rod in real time, so that the stroke of the impact rod is calculated through the included angle between the emergent light of the laser displacement sensor and the axial direction of the impact rod, the detection of the stroke of the micro forging device is realized, and the micro forging device is compact in structure and high in precision.
2. According to the invention, the size of the acute angle between the emergent light of the laser displacement sensor and the central axis of the impact rod is 45 degrees, so that interference can be reduced, and the structure is compact.
3. According to the invention, the micro forging head and the impact rod are in threaded connection, so that the micro forging heads with different punch diameters can be replaced, and the applicability of the micro forging device is improved.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
fig. 1 is a cross-sectional view showing the overall structure of a micro forging apparatus according to the present invention.
The figure shows:
air-cooled interface 6 of stroke measuring boss 1
Yoke 7 of laser displacement sensor 2
Displacement sensor connection module 3 coil 8
Impact bar 4 housing 9
Permanent magnet 5 micro-forging head 10
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
As shown in fig. 1, the micro-forging device for stroke monitoring provided by the invention comprises a stroke measurement boss 1, a laser displacement sensor 2, a displacement sensor connecting module 3, an impact rod 4, a permanent magnet 5, an air cooling interface 6, a magnetic yoke 7, a coil 8, a shell 9 and a micro-forging head 10.
Specifically, the permanent magnet 5 is fixedly arranged with respect to the housing 9, the permanent magnet 5 generating a fixed magnetic field inside the system. One end of the impact rod 4 stretches into the shell, the other end of the impact rod 4 stretches out of the shell and is in sliding fit with the shell 9, one end of the impact rod 4 stretching out of the shell is fixedly connected with the stroke measuring boss 1 through a machine, the tail end of the impact rod 4 stretching out of the shell 9 is detachably and fixedly connected with the micro forging head 10, the coil 8 is wound on the magnetic yoke 7 fixedly connected with the part of the impact rod 4 stretching into the shell 9, and the permanent magnet 5, the magnetic yoke 7 and the coil 8 jointly form a driving system of the micro forging device.
When the coil 8 is electrified, current is arranged in the coil, corresponding electromagnetic force can be generated to drive the impact rod 4 and the micro forging head 10 to move due to the electromagnetic interaction principle, when alternating current with a certain frequency is electrified to the coil 8, the alternating electromagnetic force with a corresponding frequency can be generated to drive the impact rod 4 and the micro forging head 10 to periodically move, and the impact rod 4 and the micro forging head 10 perform reciprocating mechanical impact movement to continuously impact the surfaces of parts so as to realize a mechanical strengthening effect.
The laser displacement sensor 2 is fixedly connected to the outer wall of the shell 9 through a connecting piece and the displacement sensor connecting module 3 in a matched and fastened mode, the stroke measurement boss 1 is fixedly connected with the part, extending out of the shell 9, of the impact rod 4, and the stroke measurement boss 1 and the shell 9 move linearly relatively. The emergent light of the laser displacement sensor 2 forms an acute angle with the central axis of the impact rod 4, and the emergent light of the laser displacement sensor 2 is perpendicular to the measuring surface of the stroke measuring boss 1.
Further, the impact rod 4 is arranged in the shell 9, the impact rod 4 is fixedly connected with the magnetic yoke 7 and the coil 8, a gap exists between the coil 8 and the permanent magnet 5 fixedly connected to the shell 9, the impact rod 4 is in sliding and movable fit with the inner wall of the shell 9, the impact rod 4, the magnetic yoke 7 and the coil 8 are fixedly connected into a whole, and the impact rod, the magnetic yoke 7 and the coil 8 can reciprocate in the shell 9 along the length direction of the impact rod 4. The air-cooled interface 6 is used for cooling the coil 8, and the service life of the micro-forging device is ensured.
The laser displacement sensor 2 is fixedly connected with the shell 9 through the displacement sensor connecting module 3. Because the forging head reciprocates along the axial direction in the micro forging process, and because the range of the laser displacement sensor 2 and the geometric dimension of the micro forging device are limited, the laser displacement sensor 2 is difficult to collect along the parallel movement direction, and therefore the laser displacement sensor 2 and the micro forging head 10 are arranged at a certain acute included angle. The stroke measuring boss 1 is fixedly connected to the impact rod 4, and moves along with the impact rod 4 and the micro forging head 10, the stroke measuring boss 1 is provided with an optical path of which the inclined edge is vertically opposite to the laser displacement sensor 2, and the laser displacement sensor 2 directly collects and measures the relative displacement of the inclined edge of the stroke measuring boss 1.
In the present application, the size of the acute angle between the outgoing light of the laser displacement sensor 8 and the central axis of the impact rod 11 is preferably 45 °, which can avoid interference and has a compact structure.
The stroke measuring boss 1 moves along with the axial direction of the impact rod 4 along with the impact rod 4, the axial movement of the impact rod 4 is the stroke s, and the stroke s of the micro-forging device meets the following relation: s=h/sina. Wherein h represents the displacement of the measuring surface of the stroke measuring boss 1 relative to the laser displacement sensor 2, and a is the acute angle between the emergent light of the laser displacement sensor 2 and the central axis of the impact rod 4.
More specifically, the impact rod 4 fixedly connected with the stroke measuring boss 1 is in sliding fit with the inner wall of the shell 9.
In the practical application process, the micro forging heads 10 with different punch diameters often need to be replaced, and for convenience in operation, the micro forging heads 10 are in threaded connection with one end of the impact rod 4 extending out of the shell 9. The stroke acquisition system is integrated on the micro-forging device through guiding and positioning of the stroke measurement boss 1 and the circumferential linear motion pair, and can not generate any positioning change along with the disassembly of the micro-forging head 10, repeated positioning is not needed when the forging head is replaced, and the micro-forging head is excessively disassembled.
The system also comprises a processing system, wherein the processing system acquires information acquired by the laser displacement sensor 2, and the information is calculated according to the following formula after the signal is processed:
s＝h/sina；
wherein, the measurement surface of the h-stroke measurement boss 1 is relative to the displacement of the laser displacement sensor 2, and a is an acute angle between the emergent light of the laser displacement sensor 8 and the central axis of the impact rod 4.
The laser displacement sensor 2 acquires the displacement of the measuring surface of the stroke measuring boss 1 relative to the laser displacement sensor 2 in real time by taking the retraction state of the impact rod 4 as a stroke zero point. The laser displacement sensor 2 sends the collected photoelectric signals of the movement of the stroke measurement boss 1 to the processing system in a wired or wireless mode for corresponding signal processing, so that the displacement of the stroke measurement boss 1 relative to the laser displacement sensor 2 can be obtained, the impact distance of the micro forging head 10 can be indirectly obtained, the stroke size of the micro forging head 10 can be obtained in real time by taking the retraction state of the micro forging head 10 as a stroke zero point, and the initial stroke size can be determined and set through the stroke monitoring device before the strengthening process starts, and meanwhile, the whole measurement micro forging device is more compact in structure due to the arrangement.
Those skilled in the art will appreciate that the invention provides a system and its individual devices, modules, units, etc. that can be implemented entirely by logic programming of method steps, in addition to being implemented as pure computer readable program code, in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers, etc. Therefore, the system and various devices, modules and units thereof provided by the invention can be regarded as a hardware component, and the devices, modules and units for realizing various functions included in the system can also be regarded as structures in the hardware component; means, modules, and units for implementing the various functions may also be considered as either software modules for implementing the methods or structures within hardware components.
In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and are not to be construed as limiting the present application.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the invention. The embodiments of the present application and features in the embodiments may be combined with each other arbitrarily without conflict.

Claims (9)

1. The electromagnetic driving type micro-forging device for stroke monitoring is characterized by comprising a stroke measuring boss (1), a laser displacement sensor (2), a displacement sensor connecting module (3), an impact rod (4), a permanent magnet (5), an air cooling interface (6), a magnetic yoke (7), a coil (8), a shell (9) and a micro-forging head (10), wherein the permanent magnet (5) is fixedly arranged relative to the shell (9);
one end of the impact rod (4) extends into the shell (9) and is fixedly connected with the magnetic yoke (7), the coil (8) is wound on the magnetic yoke (7), the other end of the impact rod (4) extends out of the shell (9), and the impact rod (4) is in sliding fit with the shell (9);
one side of the impact rod (4) extending out of the shell is fixedly connected with the stroke measurement boss (1), the tail end of the impact rod (4) extending out of the shell (9) is detachably and fixedly connected with the micro forging head (10), and the laser displacement sensor (2) is fixedly arranged on the outer wall of the shell (9);
the outgoing light of the laser displacement sensor (2) and the central axis of the impact rod (4) form an acute angle, and the outgoing light of the laser displacement sensor (2) and the measuring surface of the stroke measuring boss (1) are mutually perpendicular.
2. The stroke-monitored micro-forging apparatus as set forth in claim 1, wherein a stroke s of said micro-forging apparatus satisfies the following relation: s=h/sina;
wherein h represents the displacement of the measuring surface of the stroke measuring boss (1) relative to the laser displacement sensor (2), and a is an acute included angle between the emergent light of the laser displacement sensor (2) and the central axis of the impact rod (4).
3. A stroke-monitoring micro-forging device as claimed in claim 2, wherein the acute angle between the outgoing light of the laser displacement sensor (2) and the central axis of the impact rod (4) is 45 °.
4. A stroke-monitoring micro-forging device as claimed in claim 1, wherein the laser displacement sensor (2) is fixedly connected to the outer wall of the housing (9) by means of a connection piece and a displacement sensor connection module (3).
5. A stroke-monitoring micro-forging device as claimed in claim 1, wherein the micro-forging head (10) is screwed to the end of the impact rod (4) extending beyond the housing (9).
6. The micro-forging device for stroke monitoring according to claim 1, wherein an impact rod (4) is arranged in the shell (9), the impact rod (4) is fixedly connected with the magnet yoke (7) and the coil (8), a gap exists between the coil (8) and the permanent magnet (5) fixedly connected with the shell (9), and the impact rod (4) is in sliding fit with the inner wall of the shell (9).
7. A stroke-monitored micro-forging device as claimed in claim 1, further comprising an air-cooled interface (6), said air-cooled interface (6) being used for cooling the coil (7).
8. The micro-forging device for stroke monitoring according to claim 1, wherein the stroke zero point is the retracted state of the impact rod (4), and the laser displacement sensor (2) acquires the displacement of the measuring surface of the stroke measuring boss (1) relative to the laser displacement sensor (2) in real time.
9. The stroke-monitored micro-forging device as recited in claim 1, further comprising a processing system that obtains information collected by the laser displacement sensor (2) and calculates according to the following formula:
s＝h/sina；
wherein h represents the displacement of the measuring surface of the stroke measuring boss (1) relative to the laser displacement sensor (2), and a is an acute included angle between the emergent light of the laser displacement sensor (2) and the central axis of the impact rod (4).
CN202311177445.2A 2023-09-12 2023-09-12 Micro-forging device for stroke monitoring Pending CN117418100A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311177445.2A CN117418100A (en) 2023-09-12 2023-09-12 Micro-forging device for stroke monitoring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311177445.2A CN117418100A (en) 2023-09-12 2023-09-12 Micro-forging device for stroke monitoring

Publications (1)

Publication Number Publication Date
CN117418100A true CN117418100A (en) 2024-01-19

Family

ID=89527315

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311177445.2A Pending CN117418100A (en) 2023-09-12 2023-09-12 Micro-forging device for stroke monitoring

Country Status (1)

Country Link
CN (1) CN117418100A (en)

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