CN112809113A

CN112809113A - Mounting method of acoustic emission sensor

Info

Publication number: CN112809113A
Application number: CN202110001644.2A
Authority: CN
Inventors: 张晓民
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-04
Filing date: 2021-01-04
Publication date: 2021-05-18

Abstract

The invention discloses an installation method of an acoustic emission sensor, which is convenient for rapidly disassembling and taking out the installed acoustic emission sensor through a permanent magnet, an electromagnet, a clamping plate and a guide connecting rod, is convenient for overhauling, maintaining or replacing the acoustic emission sensor and has excellent acoustic signal acquisition capacity; through setting up the gasbag body, effectively wrap up the acoustic emission sensor outer wall to realize sealed effect.

Description

Mounting method of acoustic emission sensor

Technical Field

The invention relates to the technical field of electric spark machining, in particular to a mounting method of an acoustic emission sensor.

Background

With the rapid development of socioeconomic, electric spark is a processing technology, mainly utilizes a discharge electrode (EDM electrode) with a specific geometric shape to burn the geometric shape of the electrode on a metal (conductive) component;

as a real-time dynamic monitoring technology, the reliability of attachment of a sensor and a monitored object is crucial to acquisition of acoustic emission data, and the effectiveness of monitoring is directly determined. Publication No. CN111390306 discloses a method for detecting the state of electric discharge machining, in the process of electric discharge machining, an acoustic emission sensor is fixed in a working solution or on a workbench, acoustic emission wave signals generated in the process of electric discharge are collected in real time, and the intensity and duration of the collected acoustic emission wave signals are calculated, but the fixing of the acoustic emission sensor becomes a great technical problem, on one hand, sealing is guaranteed, on the other hand, heat insulation is needed, and most importantly, the acoustic emission sensor cannot be in direct contact with the electric discharge machining liquid level, so that the conduction of the acoustic signals is wrong, and the detection data is inaccurate.

Therefore, the machining method of the acoustic emission sensor is provided, and the machining method can improve the detection precision and the installation and maintenance efficiency of the acoustic emission sensor in electric spark machining.

Disclosure of Invention

The invention aims to provide an installation method of an acoustic emission sensor, which aims to solve the problems that the existing electric spark machining proposed in the background technology is installed in a clamp for acoustic emission, is sealed and protected, is inconvenient to take out when a fault occurs, is not beneficial to maintenance and the like.

In order to achieve the purpose, the invention provides the following technical scheme: a method of mounting an acoustic emission sensor, comprising the steps of: (1) electrifying an electromagnet arranged on the inner wall of the clamp shell, enabling the electromagnet to attract a permanent magnet on a clamping plate in the clamping device, enabling the clamping plate matched with the outline size of the acoustic emission sensor to be mutually pulled away for a certain distance, installing the acoustic emission sensor on a bottom plate in the clamp shell, and attaching the acoustic emission sensor to a conducting plate; (2) the electromagnet is disconnected, the clamping plates around the acoustic emission sensor extrude the air bag body to clamp the acoustic emission sensor under the action of the compression spring, the bottom of the acoustic emission sensor can be supported by the expansion of the air bag body at the bottom after the acoustic emission sensor is clamped, and the signal acquisition surface of the acoustic emission sensor is tightly attached to the conducting plate; (3) the bowl-shaped sound wave collecting piece on the upper surface of the clamp shell can collect sound emission wave signals generated in the electric spark discharging process, and the sound emission wave signals can be transmitted to the transmission plate through the main transmission guide pillar and the auxiliary transmission guide pillar on the lower side of the telescopic sound wave collecting piece and then detected by the sound emission sensor.

Preferably, the clamping device comprises a clamping plate and guide connecting rods, the permanent magnet is fixed on the outer side of the clamping plate, a plurality of guide connecting rods are symmetrically fixed on the periphery of the clamping plate, the other ends of the guide connecting rods are embedded in the clamp shell, compression springs are arranged between the clamping plate and the inner wall of the clamp shell of each guide connecting rod, and electromagnets are fixed in the clamp shell of the other ends of the guide connecting rods; the conducting plate passes through the gasbag body with the bottom of anchor clamps casing is connected, the gasbag body sets up between splint and acoustic emission sensor, the internal packing of gasbag has gas.

Preferably, the mounting plate outer ring is provided with a sealing gasket.

Preferably, the periphery of the sound wave collecting sheet is fixed with the outer ring of the clamp shell.

Preferably, the profile of the clamping device is adapted to the outer dimensions of the acoustic emission sensor.

Preferably, the balloon body is made of a material having high strength and high toughness.

Preferably, the main guide post, the auxiliary guide post and the conductive plate are made of materials with poor heat conduction performance and good sound conduction performance.

Compared with the prior art, the invention has the beneficial effects that:

1. when the electromagnet is powered off, the clamping plate is pushed to the outer wall of the acoustic emission sensor under the action of the compression spring, so that the acoustic emission sensor is in a clamping state, the acoustic emission sensor is easily disassembled or clamped by the clamp, and the acoustic emission sensor is convenient to use;

2. according to the invention, the sound wave signals are effectively collected by the sound wave collecting piece, the sound emission wave signals generated in the electric spark discharging process collected by the sound wave collecting piece can be effectively conducted onto the conducting plate through the main conducting post and the auxiliary conducting post, and the conducting plate is effectively contacted with the sound emission sensor, so that the signals detected by the sound emission sensor are more accurate and effective;

3. the air bag body is extruded through the clamping plate, so that the acoustic emission sensor is clamped, the air bag body expands towards the periphery and is tightly attached to the periphery under the action of the clamping plate and the acoustic emission sensor, and the outer wall of the acoustic emission sensor is effectively coated, so that the sealing effect is realized;

4. the airbag body is extruded by the clamping plate, so that the airbag body at the bottom is expanded to support the bottom of the acoustic emission sensor, the conducting plate is pulled in the process that the clamping plate extrudes the airbag body, the conducting column and the acoustic wave collecting sheet are further tensioned by the conducting plate, the conducting efficiency and the collecting capacity of acoustic wave signals are improved, the conducting plate is effectively attached to the signal collecting surface of the acoustic emission sensor under the action of the airbag body, and the detection capacity is improved;

5. according to the acoustic emission sensor, the main transmission guide pillar, the auxiliary transmission guide pillar and the transmission plate are made of materials with poor heat conduction performance and good sound conduction performance, and the air bag body has good heat insulation performance, so that the acoustic emission sensor has a good heat insulation effect, and the detection performance of the acoustic emission sensor is prevented from being influenced when the temperature of working fluid is high.

Drawings

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is a schematic diagram of a cross-sectional structure of the present invention;

FIG. 3 is a schematic longitudinal sectional view of the present invention;

fig. 4 is a schematic view of a longitudinal sectional structure of the acoustic emission sensor according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1 to 4, the method for mounting an acoustic emission sensor according to the present embodiment includes the steps of: (1) electrifying an electromagnet 10 arranged on the inner wall of the clamp shell 1, enabling the electromagnet 10 to attract a permanent magnet 9 on a clamping plate 8 in the clamping device, enabling the clamping plate 8 matched with the outline size of an acoustic emission sensor 13 to be mutually pulled away by a certain distance, installing the acoustic emission sensor 13 on a bottom plate 12 in the clamp shell, and enabling the acoustic emission sensor 13 to be tightly attached to a conducting plate 6; (2) the electromagnet 10 is switched off, under the action of the compression spring, the clamping plates 8 around the acoustic emission sensor 13 extrude the air bag body 7 to clamp the acoustic emission sensor 13, the bottom of the acoustic emission sensor 13 can be supported by the expansion of the air bag body 7 at the bottom after the acoustic emission sensor 13 is clamped, and the signal acquisition surfaces of the conducting plate 6 and the acoustic emission sensor are tightly attached; (3) the bowl-shaped sound wave collecting piece 3 on the upper surface of the clamp shell 1 collects sound emission wave signals generated in the electric spark discharging process, and the sound emission wave signals are detected by the sound emission sensor 13 after being transmitted to the transmission plate 6 through the main transmission guide pillar and the auxiliary transmission guide pillar on the lower side of the sound wave collecting piece 3.

The electric spark machining clamp comprises a clamp shell 1, a connecting support rod 2 is fixedly arranged at the bottom end of the clamp shell 1, a clamp body is fixed in working liquid or on a workbench through the support rod 2, a mounting plate 12 is arranged at the bottom of the clamp shell 1, a circle of the mounting plate 12 is provided with a sealing ring when an acoustic emission sensor is mounted, sealing of a mounting opening is achieved, a bowl-shaped acoustic wave collecting piece 3 is fixedly mounted on the upper surface of the clamp shell 1, the bowl-shaped acoustic wave collecting piece 3 faces the direction of a working surface of electric spark machining, the bowl-shaped acoustic wave collecting piece 3 is convenient for collecting acoustic wave signals, the periphery of the acoustic wave collecting piece 3 is fixed with the outer ring of the clamp shell 1, a main transmission guide pillar 4 is fixed at the center of the bottom of the acoustic wave collecting piece 3, a conduction plate 6 is connected to the other end of the main transmission pillar 4, an auxiliary transmission guide pillar 5 is uniformly connected between the acoustic wave collecting piece 3 and on the effectual conduction of acoustic emission wave signal was conducted conduction board 6, conduction board 6 and acoustic emission sensor 13 effective contact for the signal that acoustic emission sensor 13 detected is more accurate effective.

A plurality of clamping devices are symmetrically arranged on the periphery below the conducting plate 6, each clamping device comprises a clamping plate 8 and a guide connecting rod 11, a permanent magnet 9 is fixed on the outer side of each clamping plate 8, a plurality of guide connecting rods 11 are symmetrically fixed on the periphery of each clamping plate 8, the other ends of the guide connecting rods 11 are embedded in the fixture shell 1, compression springs are arranged between the clamping plates 8 and the inner wall of the fixture shell 1 of each guide connecting rod 11, electromagnets 10 are fixed in the fixture shell 1 in the direction of the other ends of the guide connecting rods 11, sliding plates are fixed at the tail ends of the guide connecting rods 11, matched guide grooves are formed in the embedded parts of the guide connecting rods 11 in the fixture shell 1, the sliding plates can freely slide in the guide grooves, the distribution of the clamping devices is matched with the shape and size of the acoustic emission sensor 13, under the action of the compression springs, the clamping plates, when the acoustic emission sensor 13 needs to be disassembled, only the electromagnet 10 needs to be electrified, the electromagnet 10 attracts the permanent magnet 9, and then the clamping plate 8 is driven to be separated from the acoustic emission sensor 13, so that the acoustic emission sensor can be disassembled easily, and the acoustic emission sensor 13 is convenient to disassemble and assemble.

When the clamp is placed in the working solution, the sealing performance and the heat insulation performance are good, the detection of the acoustic emission sensor is prevented from being influenced, as shown in reference to fig. 3 and 4, the conducting plate is connected with the bottom of the clamp shell 1 through the air bag body 7, the air bag body 7 is arranged between the clamping plate 8 and the acoustic emission sensor 13, the air bag body 7 is filled with gas, the air bag body has higher strength and toughness, the acoustic emission sensor 13 is arranged in the clamp shell 1, when the electromagnet 10 is not electrified, the air bag body 7 is extruded by the clamping plate 8 in a circle under the action of the compression spring, the acoustic emission sensor 13 is clamped, the air bag body 7 is mutually attached to the periphery in an expansion manner under the action of the clamping plate 8 and the acoustic emission sensor 13, the outer wall of the acoustic emission sensor is effectively coated, the sealing effect is realized, meanwhile, the air bag body 7 at the bottom is, simultaneously splint 8 extrusion gasbag body 7 the in-process can stimulate conduction board 6, and then collects piece 3 through 6 taut conduction posts of conduction board and sound wave, improves the conduction efficiency and the collection ability of sound wave signal, carries out effectual laminating with conduction board 6 and acoustic emission sensor's signal acquisition face under the effect of gasbag body 7, improves the detection ability.

The main conduction post 4, the auxiliary conduction post 5 and the conduction plate 6 are made of materials with poor heat conduction performance and good sound conduction performance, the air bag body 7 is filled with gas, so that the heat insulation performance is better, if the heat insulation effect needs to be enhanced, inert gas can be filled into the air bag body 7, the acoustic emission sensor 13 is enabled to have better heat insulation effect, and the detection performance of the acoustic emission sensor 13 is prevented from being influenced when the temperature of the working fluid is higher.

The working principle is as follows: when the acoustic emission sensor is used, the electromagnet 10 is electrified, the electromagnet 10 attracts the permanent magnet 9, the clamping plate 8 matched with the acoustic emission sensor 13 in shape and size is pulled away from each other for a certain distance, the mounting base plate 12 is opened, the acoustic emission sensor 13 is arranged in the clamp and tightly attached to the conducting plate, then the electromagnet 10 is disconnected, the clamping plate 8 on one circle extrudes the air bag body 7 under the action of the compression spring, the acoustic emission sensor 13 is further clamped, the air bag body 7 expands towards the periphery and tightly attaches to each other under the action of the clamping plate 8 and the acoustic emission sensor 13, the outer wall of the acoustic emission sensor is effectively coated, the sealing effect is realized, meanwhile, the air bag body 7 on the bottom expands to support the bottom of the acoustic emission sensor 13, the conducting plate 6 can be pulled in the process that the air bag body 7 is extruded by the clamping plate 8, the conducting column and the acoustic wave collecting sheet 3 are tensioned through the, carry out effectual laminating with conduction board 6 and acoustic emission sensor's signal acquisition face under the effect of the gasbag body 7, improve the detection ability, main conduction post 4, vice conduction post 5 and conduction board 6 adopt the material that the thermal conductivity is poor, because gasbag body 7 is gassy, better heat-proof quality has, thereby make acoustic emission sensor 13 have better thermal-insulated effect, when avoiding the working solution temperature higher, influence acoustic emission sensor 13's detection performance, when needing to unpick and wash the maintenance, only need to energize electro-magnet 10, electro-magnet 10 actuation permanent magnet 9, and then drive splint 8 and break away from acoustic emission sensor 13, just can easily dismantle, make the dismantlement installation very convenient.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A method of mounting an acoustic emission sensor, comprising the steps of: step (1), an electromagnet (10) arranged on the inner wall of a clamp shell (1) is electrified, so that the electromagnet (10) attracts a permanent magnet (9) on a clamping plate (8) in a clamping device, the clamping plate (8) matched with the appearance size of an acoustic emission sensor (13) is pulled outwards and away from each other by a certain distance, the acoustic emission sensor (13) is arranged on a bottom plate (12) in the clamp shell, and the upper surface of the acoustic emission sensor (13) is tightly attached to a conducting plate (6); step (2), the electromagnet (10) is switched off, the clamping plates (8) on the periphery of the acoustic emission sensor (13) extrude the air bag body (7) to clamp the acoustic emission sensor (13) under the action of a compression spring, the air bag body (7) at the bottom after clamping the acoustic emission sensor (13) expands to support the bottom of the acoustic emission sensor (13), and the signal acquisition surface of the acoustic emission sensor (13) is tightly attached to the conduction plate (6); and (3) collecting the acoustic emission wave signals generated in the electric spark discharging process by a bowl-shaped acoustic wave collecting sheet (3) on the upper surface of the clamp shell (1), and transmitting the acoustic emission wave signals to the conduction plate (6) through a main transmission guide pillar (4) and an auxiliary transmission guide pillar (5) on the lower side of the telescopic acoustic wave collecting sheet (3) so as to detect the acoustic emission wave signals by the acoustic emission sensor (13).

2. The method of mounting an acoustic emission sensor according to claim 1, wherein: the clamping device comprises a clamping plate (8) and guide connecting rods (11), wherein a permanent magnet (9) is fixed on the outer side of the clamping plate (8), a plurality of guide connecting rods (11) are symmetrically fixed on the periphery of the clamping plate (8), the other ends of the guide connecting rods (11) are embedded into the clamp shell (1), compression springs are arranged between the clamping plate (8) and the inner wall of the clamp shell (1) of each guide connecting rod (11), an electromagnet (10) is fixed in the clamp shell (1) in the direction of the other end of each guide connecting rod (11), a sliding plate is fixed at the tail end of each guide connecting rod (11), and a matched guide groove is formed in the embedding part of each guide connecting rod (11) in the clamp shell (1) so that the sliding plate can freely slide in the guide groove; conduction board (6) pass through the gasbag body (7) with the bottom of anchor clamps casing (1) is connected, the gasbag body (7) set up between splint (8) and acoustic emission sensor (13), the gasbag body (7) intussuseption is filled with gas.

3. The method of mounting an acoustic emission sensor according to claim 1, wherein: and a sealing gasket is arranged on the outer ring of the mounting plate (12).

4. The method of mounting an acoustic emission sensor according to claim 1, wherein: the periphery of the sound wave collecting sheet (3) is fixed with the outer ring of the clamp shell (1).

5. The method of mounting an acoustic emission sensor according to claim 1, wherein: the distribution of the clamping device is matched with the external dimension of the acoustic emission sensor.

6. The method of mounting an acoustic emission sensor according to claim 1, wherein: the air bag body (7) is made of a material with high strength and high toughness.

7. The method of mounting an acoustic emission sensor according to claim 1, wherein: the main transmission guide post (4), the auxiliary transmission guide post (5) and the transmission plate (6) are made of materials with poor heat conduction performance and good sound conduction performance.

8. The method of mounting an acoustic emission sensor according to claim 1, wherein: when the acoustic emission sensor (13) needs to be disassembled, the electromagnet (10) is electrified again, the electromagnet (10) attracts the permanent magnet (9), the clamping plate (8) is further driven to be separated from the acoustic emission sensor (13), and the acoustic emission sensor (13) can be disassembled.