CN112757051A

CN112757051A - Detection device

Info

Publication number: CN112757051A
Application number: CN201910997894.9A
Authority: CN
Inventors: 邹少华; 徐大壮
Original assignee: Fuding Electronic Technology Jiashan Co Ltd
Current assignee: Fuding Electronic Technology Jiashan Co Ltd
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2021-05-07

Abstract

A detection device is used for detecting the cutter breakage of a cutter on a CNC machine table and comprises a body, a shaft sleeve, a detection shaft, a magnetic ring and an inductor, the body is provided with a containing cavity, the side wall of the body is also provided with a vent hole, the vent hole is communicated with the containing cavity, the shaft sleeve is arranged in the accommodating cavity, the detection shaft is slidably arranged on the shaft sleeve in a penetrating way and is accommodated in the accommodating cavity, one end of the detection shaft is contacted with the cutter so as to move in the accommodating cavity under the driving of the cutter, the vent hole is communicated with an air source so that the detection shaft moves in the accommodating cavity under the action of the air introduced from the air source, the magnetic ring is arranged in the accommodating cavity and fixed on the detection shaft, and the inductor is arranged on the body to sense the position change of the magnetic ring along with the movement of the detection shaft.

Description

Detection device

Technical Field

The invention relates to the field of detection, in particular to a detection device.

Background

A cnc (computer numerical control) machine generates a large amount of cutting chips during machining, which easily causes cutter breakage, affects machining precision and even is scrapped, and therefore, the cutter needs to be periodically detected. At present, electronic switch type or infrared non-contact type is mostly adopted for detecting the broken cutter, the electronic switch is used for detecting, the cutter touches the electronic switch, current signals are output, the state of the cutter is confirmed, the defects in the aspects of water resistance and interference resistance exist, the service life and stability of the cutter cannot be guaranteed, and the problem of large errors exists when the broken cutter is confirmed in an infrared signal induction mode.

Disclosure of Invention

In view of the above, it is necessary to provide a detection device to solve the above problems.

Furthermore, the detection device also comprises an air pressure regulator, one end of the air pressure regulator is connected with the air source, and the other end of the air pressure regulator is communicated with the vent hole so as to introduce air with constant air pressure into the accommodating cavity.

Furthermore, the body is further provided with an installation groove on the side wall of the body, the installation groove extends along the axial direction of the accommodating cavity, and the inductor is installed in the installation groove.

Furthermore, the accommodating cavity comprises an accommodating cavity and a movable cavity which are communicated, the vent hole is communicated with the movable cavity, the shaft sleeve is arranged in the accommodating cavity, and the magnetic ring is arranged in the movable cavity and fixed at one end of the detection shaft.

Furthermore, a stopping groove is formed in the position, close to the opening, of the accommodating cavity and surrounds the peripheral wall of the accommodating cavity, the shaft sleeve comprises a sleeve and a fixing piece, the sleeve is arranged in the accommodating cavity, a mounting hole is formed in the sleeve in the axial direction of the sleeve, the mounting hole penetrates through the sleeve to allow the detection shaft to pass through in a sliding mode, and the fixing piece is arranged in the stopping groove and abuts against the sleeve to fix the sleeve in the body.

Further, the shaft sleeve further comprises a sealing ring, and the sealing ring is sleeved on the sleeve.

Furthermore, one end of the detection shaft penetrating through the shaft sleeve is provided with a detection pin, and the detection pin is used for being in contact with the cutter so as to enable the detection shaft to move in the accommodating cavity under the driving of the cutter.

Furthermore, a piston is arranged at one end, accommodated in the accommodating cavity, of the detection shaft, and the piston is used for enabling the detection shaft to move in the accommodating cavity under the action of gas introduced into the gas source.

Further, a sealing ring is sleeved outside the piston and used for enabling the piston to be in sealing contact with the inner wall of the accommodating cavity.

Furthermore, the detection shaft is provided with an installation groove around the circumference thereof, and the magnetic ring is sleeved in the installation groove.

Above-mentioned detection device will detect the axle through let in gas in the chamber of acceping at the body and keep to set up the inductor on the body, respond to the position that the epaxial magnetic ring of detection was located to the cover with this, push down through the control cutter and support and hold the detection axle and remove, and record the distance that the magnetic ring removed, thereby detect whether the cutter splits, simple structure, convenient operation detects stably, and the water-resistant is anticorrosive, has improved the efficiency and the life that detect.

Drawings

Fig. 1 is a schematic perspective view of a detection apparatus in one embodiment of the present invention.

Fig. 2 is a partially exploded perspective view of the detection device shown in fig. 1.

FIG. 3 is a cross-sectional view of the detecting unit shown in FIG. 1 taken along line III-III.

Description of the main elements

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and fig. 2, an embodiment of the invention provides a detecting device 100 disposed on a CNC machine (not shown). The detection device 100 can detect the tool breaking of the tool on the CNC machine. The detecting device 100 includes a body 10, a sleeve 20, a detecting shaft 30, a magnetic ring 40, an inductor 50, and a pressure regulator (not shown). The sleeve 20 is disposed in the body 10. The detecting shaft 30 is slidably inserted into the sleeve 20 and is accommodated in the body 10. The magnetic ring 40 is disposed in the body 10 and fixed to one end of the detecting shaft 30. The inductor 50 is disposed on the body 10. The air pressure regulator is in communication with the body 10.

Referring to fig. 3, the main body 10 is provided with a receiving cavity 11. The housing chamber 11 has a substantially cylindrical shape. The main body 10 further has a vent hole 12 and a mounting groove 13 formed in a side wall thereof. The vent hole 12 is communicated with the containing cavity 11. The mounting groove 13 extends in the axial direction of the housing chamber 11. The accommodating cavity 11 includes an accommodating cavity 111 and a movable cavity 112 communicated with each other. The accommodating cavity 111 and the movable cavity 112 are coaxial. The aperture of the accommodating cavity 111 is larger than that of the movable cavity 112. Vent 12 communicates with active chamber 112. The position of the accommodating cavity 11 close to the opening is further provided with a stop groove 113 around the peripheral wall of the accommodating cavity 111. The shaft sleeve 20 is disposed in the accommodating cavity 111. The sensor 50 is installed in the installation groove 13. The air pressure regulator is communicated with the vent hole 12. In an embodiment, the axis of the vent 12 is perpendicular to the axis of the receiving cavity 11, but is not limited thereto.

The sleeve 20 includes a sleeve 21, a fixing member 22, and a packing 23. The sleeve 21 is substantially hollow and cylindrical, and is disposed in the accommodating chamber 111. The sleeve 21 has a mounting hole 211 formed therethrough in the axial direction thereof. A mounting hole 211 extends through the sleeve 21 to allow the test shaft 30 to slide therethrough. The fixing member 22 is disposed in the stopping groove 113 and abuts against the sleeve 21 to fix the sleeve 21 in the body 10. The sleeve 21 is sleeved with a sealing ring 23. The packing 23 is used to bring the sleeve 21 into sealing contact with the inner wall of the housing chamber 11.

The sensing shaft 30 passes through the mounting hole 211 of the sleeve 21 and protrudes from the mounting hole 211. One end of the detection shaft 30 penetrating the sleeve 21 is provided with a detection pin 31. The detection pin 31 is used for contacting the tool to detect the breakage thereof. The detection shaft 30 is provided with a piston 32 at one end thereof received in the receiving chamber 11. A sealing ring 321 is sleeved outside the piston 32. The packing 321 is used to bring the piston 32 into sealing contact with the inner wall of the housing chamber 11. The detection shaft 30 is provided with a mounting groove 33 around the circumference thereof. In an embodiment, the mounting groove 33 is opened on a side of the piston 32 away from the detection pin 31, but is not limited thereto. The end surface of the detection pin 31 is a spherical surface.

The magnetic ring 40 is sleeved in the mounting groove 33.

The inductor 50 is installed in the installation groove 13 to sense the position change of the magnetic ring 40 in the accommodation cavity 11.

One end of the air pressure regulator is connected with an air source, and the other end of the air pressure regulator is connected with the vent hole 12 so as to introduce clean air with constant air pressure into the accommodating cavity 11 through the vent hole 12.

During detection, the CNC machine controls the cutter to move to the uppermost contact position X1 of the detection pin 31, at this time, the detection shaft 30 is only under the action of constant air pressure in the accommodating cavity 11 and is kept at the initial position, and the inductor 50 detects that the magnetic ring 40 is located at the Y1 position; then, the tool is moved downwards to the position X2, in the process, the driving force of the CNC machine is greater than the air pressure, so that the tool abuts against the detecting shaft 30 to move downwards, under the combined action of the driving force of the CNC machine and the constant air pressure, the detecting shaft 30 is pressed to the detecting position, and the inductor 50 detects the position Y2 where the magnetic ring 40 is located; judging the sizes of Y2-Y1 and X2-X1: if the two are equal, the cutter does not break, and if the two are not equal, the cutter breaks. After the detection, the cutter is moved back to the position X1, and at this time, the force of the cutter against the detection shaft 30 is eliminated, and the detection shaft 30 is pushed back to the initial position under the action of the constant air pressure, and the magnetic ring 40 is also returned to the position Y1.

The detection device 100 keeps the detection shaft 30 by introducing gas with constant air pressure into the accommodating cavity 11 of the body 10, and the inductor 50 is arranged on the body 10 to induce the position of the magnetic ring 40 sleeved on the detection shaft 30, the detection shaft 30 is pressed and supported to move by controlling the cutter to press, and the moving distance of the magnetic ring 40 is measured, so that whether the cutter is broken or not is detected.

In addition, other modifications within the spirit of the invention may occur to those skilled in the art, and such modifications are, of course, included within the scope of the invention as claimed.

Claims

1. A detection device is used for detecting the cutter breakage of a cutter on a CNC machine table and is characterized in that, the detection device comprises a body, a shaft sleeve, a detection shaft, a magnetic ring and an inductor, wherein the body is provided with a containing cavity, the side wall of the body is also provided with a vent hole which is communicated with the containing cavity, the shaft sleeve is arranged in the accommodating cavity, the detection shaft is slidably arranged on the shaft sleeve in a penetrating way and is accommodated in the accommodating cavity, one end of the detection shaft is contacted with the cutter so as to move in the accommodating cavity under the driving of the cutter, the vent hole is communicated with an air source so that the detection shaft moves in the accommodating cavity under the action of the air introduced from the air source, the magnetic ring is arranged in the accommodating cavity and fixed on the detection shaft, and the inductor is arranged on the body to sense the position change of the magnetic ring along with the movement of the detection shaft.

2. The detection device of claim 1, wherein: the detection device further comprises an air pressure regulator, one end of the air pressure regulator is connected with the air source, and the other end of the air pressure regulator is communicated with the vent hole so as to introduce air with constant air pressure into the accommodating cavity.

3. The detection device of claim 1, wherein: the side wall of the body is further provided with an installation groove, the installation groove extends along the axial direction of the accommodating cavity, and the inductor is installed in the installation groove.

4. The detection device of claim 1, wherein: the accommodating cavity comprises an accommodating cavity and a movable cavity which are communicated, the vent hole is communicated with the movable cavity, the shaft sleeve is arranged in the accommodating cavity, and the magnetic ring is arranged in the movable cavity and fixed at one end of the detection shaft.

5. The detection device of claim 4, wherein: the position, close to the opening, of the accommodating cavity is further provided with a stop groove around the peripheral wall of the accommodating cavity, the shaft sleeve comprises a sleeve and a fixing piece, the sleeve is arranged in the accommodating cavity, the sleeve is provided with a mounting hole along the axial direction of the sleeve, the mounting hole penetrates through the sleeve to allow the detection shaft to pass through in a sliding mode, and the fixing piece is arranged in the stop groove and is abutted to the sleeve to fix the sleeve in the body.

6. The detection device of claim 5, wherein: the shaft sleeve further comprises a sealing ring, and the sealing ring is sleeved on the sleeve.

7. The detection device of claim 1, wherein: one end of the detection shaft penetrating through the shaft sleeve is provided with a detection pin, and the detection pin is used for being in contact with the cutter so as to enable the detection shaft to move in the accommodating cavity under the driving of the cutter.

8. The detection device of claim 7, wherein: the detection shaft is accommodated at one end of the accommodating cavity and is provided with a piston, and the piston is used for enabling the detection shaft to move in the accommodating cavity under the action of gas introduced into the gas source.

9. The detection device of claim 8, wherein: the piston overcoat is equipped with the sealing washer, the sealing washer is used for making the piston with the inner wall sealing contact who accepts the chamber.

10. The detection device of claim 1, wherein: the detection shaft is provided with a mounting groove around the circumference thereof, and the magnetic ring is sleeved in the mounting groove.