CN115870811A - Intelligent monitoring of milling head and change equipment for numerically controlled fraise machine - Google Patents

Abstract

The invention relates to the technical field of milling machines, and aims to solve the problem that milling quality is affected due to the fact that equipment capable of monitoring the abrasion degree of a milling head is lacked when a milling cutter works, in particular to milling head intelligent monitoring and replacing equipment for a numerical control milling machine; according to the milling cutter automatic replacement device, the cutter frame and the telescopic rod are movably matched, automatic replacement of the milling cutter is achieved, the automation degree of the device is improved, images of the milling cutter are simultaneously acquired from different angles through a plurality of groups of image acquisition devices, three-dimensional images of the milling cutter are acquired, the three-dimensional images are compared with preset milling cutter images, the abrasion degree of the milling cutter is judged, the milling cutter can be replaced in time when the abrasion degree of the milling cutter is too high, the replacement times and replacement intervals of the milling cutter are analyzed through the settlement analysis unit, the abnormal condition of the milling cutter replacement frequency can be timely found, and the rapid abrasion phenomenon of a milling head caused by abnormal conditions of equipment such as milling shaft deviation of the milling machine can be indirectly reflected.

Description

Intelligent monitoring of milling head and change equipment for numerically controlled fraise machine

Technical Field

The invention relates to the technical field of milling machines, in particular to intelligent monitoring and replacing equipment for a milling head of a numerical control milling machine.

Background

A milling machine is a machine tool with a wide range of applications, on which a plane, a groove, a tooth dividing part, a spiral surface and various curved surfaces can be machined on a workpiece by a milling cutter, the milling machine can also machine a revolving body surface, an inner hole, cutting and the like, the milling cutter is a rotary cutter with one or more cutter teeth for milling, each cutter tooth cuts off the allowance of the workpiece intermittently in sequence during operation, and the milling cutter is mainly used for machining the plane, the step, the groove, the formed surface, the cut workpiece and the like on the milling machine;

when the milling cutter is used, the milling cutter is easily worn due to quick friction of a milling head part, and after the surface layer of the milling cutter is seriously worn, the milling processing of the milling cutter is influenced, so that the processing quality is influenced and even the equipment is damaged, so that equipment capable of monitoring the wear degree of the milling head is needed, the wear condition of the milling head can be timely monitored when the milling head is used, and the milling head is automatically replaced when the milling head is seriously worn, so that the product quality uniformity during milling of the milling machine is increased, and the automation degree is improved;

in view of the above technical problem, the present application proposes a solution.

Disclosure of Invention

According to the milling cutter replacement method and device, the cutter placing holes are formed in the cutter frame, a plurality of milling cutters can be placed on the cutter frame, automatic milling cutter replacement is achieved through the movable cooperation of the cutter frame and the telescopic rods, the automation degree of equipment is improved, labor cost is reduced, a sensor in each cutter placing hole can identify whether a milling cutter exists in each hole or not, the milling cutter is a new milling cutter or a waste milling cutter, accurate replacement of the milling cutter is facilitated, images of the milling cutter are collected simultaneously from different angles through a plurality of groups of image collecting devices, the three-dimensional images of the milling cutter can be accurately obtained by combining the images of the milling cutters from multiple angles, the three-dimensional images are compared with preset milling cutter images, the wear degree of the milling cutter is judged, the milling cutter can be replaced timely when the wear degree of the milling cutter is too high, the phenomenon of a workpiece or equipment is prevented from being damaged due to continuous use of the milling cutter, the replacement times and replacement intervals of the milling cutter are analyzed through a settlement analysis unit, the situation that the replacement frequency of the milling cutter is abnormal can be timely found, the milling cutter can be indirectly reflected, the phenomenon of rapid wear of a milling head caused by abnormal equipment due to abnormal equipment, a manager can be timely reminded to inspect, the problem that the milling head is monitored and the milling head loss of milling equipment is timely monitored, and the milling head, the milling equipment is solved when the milling quality of the milling equipment is monitored.

The purpose of the invention can be realized by the following technical scheme:

the intelligent monitoring and replacing equipment for the milling head for the numerical control milling machine comprises a bottom plate, wherein a supporting rod is fixedly arranged on the upper surface of the bottom plate, a telescopic rod is fixedly arranged at the top end of the supporting rod, a cross rod is fixedly arranged on the upper surface of the telescopic rod, and a milling cutter seat is rotatably connected below one end, far away from the telescopic rod, of the cross rod;

the milling cutter seat lower surface rotates and is connected with the tool changing and revolves the cover, tool changing revolves cover internally mounted has an axle stator motor, fixed surface installs the slide plate on the bottom plate, the slide plate is located the milling cutter seat under, the multiunit spout has been seted up to the slide plate upper surface, the slide plate has toolframe and roating seat through this spout sliding connection, toolframe and roating seat initial state are located the both ends of slide plate respectively down, the toolframe upper surface has been seted up the cutter and has been placed the hole, the roating seat has three-jaw chuck towards the one end fixed mounting of toolframe, fixed surface installs at least two sets of image acquisition equipment on the roating seat, image acquisition equipment's orientation is directional tool changing and revolves under the axle center of cover extension line department, the cutter is placed hole internally mounted and is had the sensor, roating seat internally mounted has control module.

As a preferred embodiment of the present invention, the control module includes a milling cutter image acquisition unit, a processor, an image deviation analysis unit, a tool bit controller and a settlement analysis unit, the tool bit controller includes multiple sets of controllers, the multiple sets of controllers are respectively used for controlling the rotation of the tool changing rotary sleeve and the movement of the tool holder and the rotary base, and the processor is in bidirectional communication with the above units.

As a preferred embodiment of the present invention, the milling cutter image acquisition unit acquires a milling cutter image mounted on a tool changing rotary sleeve through an image acquisition device, performs gray processing on the acquired image to obtain an analysis image, and transmits the analysis image to a processor, the processor receives the analysis image and transmits the analysis image to an image deviation analysis unit, the image deviation analysis unit acquires the analysis image, selects a portion where the tool changing rotary sleeve is located in the analysis image as a reference point, acquires a preset milling cutter standard image, records the preset milling cutter standard image as a comparison image, compares the analysis image with the standard image, feeds back an analysis result to the processor after acquiring the analysis result, the processor simultaneously transmits the analysis result to the cutter head controller and a settlement analysis unit, the cutter head controller performs judgment according to the analysis result and generates a milling cutter wear signal or a milling cutter normal signal, and the cutter head controller generates the milling cutter wear signal and then transmits an instruction to the controller to perform milling cutter replacement.

As a preferred embodiment of the present invention, the milling cutter image acquisition unit acquires an image after each milling cutter operation is completed, and when acquiring an image of the milling cutter, the sensor controls the milling cutter base to rotate 90 ° every second until the rotation angle reaches 360 °, and when the milling cutter rotates once, the image acquisition device acquires an image of the milling cutter once, synthesizes a three-dimensional stereo image of the milling cutter according to images taken by two sets of image acquisition devices at different angles, marks the three-dimensional stereo image as an analysis image after performing gray processing, and sends the analysis image to the processor.

As a preferred embodiment of the present invention, the image deviation analysis unit acquires a three-dimensional stereoscopic image of the tool changing sleeve in the analysis image and marks the three-dimensional stereoscopic image as a reference, acquires a comparison image preset by an administrator, acquires a position of the tool changing sleeve in the comparison image, marks the position as a coincidence point, overlaps the analysis image with the comparison image, completely coincides a part of the tool changing sleeve in the analysis image and the comparison image when overlapping, marks a part of the analysis image where the milling cutter part is missing with respect to the milling cutter part in the comparison image after the coincidence, and records the part as a wear layer.

As a preferred embodiment of the present invention, the cutter head control unit analyzes the wear layer, obtains a maximum wear thickness and an average wear thickness of the wear layer, compares the maximum thickness and the average thickness with a maximum wear threshold and an average wear threshold, respectively, generates a milling cutter wear signal if the average wear thickness is greater than the average wear threshold or the maximum wear thickness is greater than the maximum wear threshold, and generates a milling cutter normal signal if the average wear thickness is less than the average wear threshold and the maximum wear thickness is less than the maximum wear threshold;

and after the cutter head control unit generates a milling cutter abrasion signal, acquiring cutter placing information in the cutter placing hole from the processor, and generating a cutter changing instruction according to the cutter placing information to finish the replacement of the milling cutter.

As a preferred embodiment of the present invention, the settlement analysis unit records the tool changing times and the tool changing time interval, compares the tool changing time interval with a preset interval time threshold, generates a wear abnormal signal if the tool changing time interval of two consecutive tool changes is smaller than the preset interval time threshold, and sends the wear abnormal signal to the administrator device through the network.

A milling head intelligent monitoring and replacing method for a numerical control milling machine is suitable for the milling head intelligent monitoring and replacing equipment for the numerical control milling machine, and comprises the following steps:

firstly, the following steps: the method comprises the steps that an image acquisition device acquires an image of a milling cutter mounted on a milling cutter seat, processes the image of the milling cutter and sends the processed image to an image deviation analysis unit, the image deviation analysis unit analyzes an analysis image and a comparison image, and an abraded part in the analysis image is acquired and sent to a cutter head controller;

II, secondly: the cutter head controller evaluates the worn part, judges whether the milling cutter needs to be replaced, and generates a corresponding signal or a command to drive the controller to work;

thirdly, the method comprises the following steps: the controller aligns the idle cutter placing hole under the cutter changing rotary sleeve according to the cutter placing condition on the cutter placing hole, the telescopic rod descends to insert the milling cutter on the milling cutter seat into the idle cutter placing hole, and the cutter changing rotary sleeve rotates and expands to release the milling cutter through the rotation of the cutter changing rotary sleeve;

fourthly, the method comprises the following steps: the telescopic rod is lifted, the tool holder moves, a new milling cutter is moved to the position right below the tool changing rotary sleeve, the telescopic rod descends, the tool changing rotary sleeve rotates and closes, the position of the milling cutter is fixed, and tool changing is completed;

fifthly: and the settlement analysis unit counts the times of cutter changing and the cutter changing interval, and sends a signal to an administrator to remind the administrator to check the equipment when the cutters are continuously and frequently changed.

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

1. according to the milling cutter replacing device, the cutter placing holes are formed in the cutter frame, so that a plurality of milling cutters can be placed on the cutter frame, the milling cutters can be automatically replaced through the movable cooperation of the cutter frame and the telescopic rods, the automation degree of equipment is improved, the labor cost is reduced, a sensor in each cutter placing hole can identify whether the milling cutter is in the hole or not, the milling cutter is a new milling cutter or a waste milling cutter, and the milling cutter can be accurately replaced conveniently.

2. According to the milling cutter wear degree judging method and device, the images of the milling cutter are simultaneously acquired from different angles through the plurality of groups of image acquisition devices, then the images of the milling cutter at the plurality of angles are combined, the three-dimensional image of the milling cutter can be accurately acquired, the three-dimensional image is compared with the preset milling cutter image, so that the wear degree of the milling cutter can be judged, the milling cutter can be timely replaced when the wear degree of the milling cutter is too high, and the condition that the surface layer damaged milling cutter is continuously used to cause damage to workpieces or equipment is avoided.

3. According to the milling machine, the replacement frequency and the replacement interval of the milling cutter are analyzed through the settlement analysis unit, the condition that the replacement frequency of the milling cutter is abnormal can be timely found, the phenomenon that a milling head is quickly worn due to the abnormal conditions of equipment such as milling shaft deviation of the milling machine can be indirectly reflected, a manager is timely reminded to check, and the working state of the equipment is guaranteed to be good.

Drawings

To facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic front view of the structure of the present invention;

FIG. 2 is a schematic view of a milling cutter base according to the present invention;

FIG. 3 is a schematic view of a tool changing sleeve according to the present invention;

FIG. 4 is a block diagram of the system of the present invention;

FIG. 5 is a flow chart of the system of the present invention.

In the figure: 1. a base plate; 2. a support bar; 3. a telescopic rod; 4. a milling cutter seat; 5. a slide plate; 6. a tool holder; 7. a rotating base; 8. a cutter placing hole; 9. a three-jaw chuck; 10. changing a tool rotary sleeve; 11. an image acquisition device.

Detailed Description

The technical solutions of the present invention will be described in detail and fully below with reference to the following embodiments, and it should be understood 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.

The first embodiment is as follows:

referring to fig. 1-5, an intelligent monitoring and replacing device for a milling head of a numerically controlled milling machine comprises a bottom plate 1, a support rod 2 is fixedly mounted on the upper surface of the bottom plate 1, a telescopic rod 3 is fixedly mounted at the top end of the support rod 2, the telescopic rod 3 is controlled to extend and retract through an internal hydraulic oil rod, so that a milling cutter seat 4 is lifted, a cross rod is fixedly mounted on the upper surface of the telescopic rod 3, the lower part of one end, away from the telescopic rod 3, of the cross rod is rotatably connected with the milling cutter seat 4, and the milling cutter seat 4 can rotate to drive a milling cutter to rotate so as to complete milling operation;

the lower surface of a milling cutter seat 4 is rotatably connected with a cutter changing rotary sleeve 10, a shaft stator motor is arranged in the cutter changing rotary sleeve 10 to control the cutter changing rotary sleeve 10 to rotate, a milling cutter is clamped in a three-jaw clamping seat in the cutter changing rotary sleeve 10, the cutter changing rotary sleeve 10 can control the pressure of the cutter changing rotary sleeve 10 on the three-jaw clamping seat through forward and reverse rotation when rotating, so that the milling cutter is fixed and released, a sliding plate 5 is fixedly arranged on the upper surface of a bottom plate 1, the sliding plate 5 is positioned under the milling cutter seat 4, a plurality of groups of sliding grooves are arranged on the upper surface of the sliding plate 5, the sliding plate 5 is slidably connected with a cutter frame 6 and a rotating seat 7 through the sliding grooves, the cutter frame 6 and the rotating seat 7 are respectively positioned at two ends of the sliding plate 5 in the initial state, the cutter frame 6 and the rotating seat 7 can slide on the sliding plate 5 under the driving of an electric roller, a cutter placing hole 8 is arranged on the upper surface of the cutter frame 6, the milling cutter three-dimensional image acquisition device is characterized in that a milling cutter is placed in a cutter placing hole 8, at least one group of idle placing holes are reserved in the cutter placing hole 8, a three-jaw chuck 9 is fixedly mounted at one end, facing a cutter frame 6, of a rotating seat 7 and used for fixing a workpiece to be machined, at least two groups of image acquisition devices 11 are fixedly mounted on the upper surface of the rotating seat 7, the image acquisition devices 11 are all oriented to the extension line under the axis of a cutter changing rotating sleeve 10, milling cutter images are simultaneously shot from different angles, the construction of a milling cutter three-dimensional image is achieved, a sensor is mounted in the cutter placing hole 8 and used for detecting whether the cutter is arranged in the cutter placing hole 8 or not, meanwhile, the time for placing the cutter is detected through the sensor in the cutter placing hole 8, the cutter placing hole 8 is marked as a new cutter or a replaced abandoned milling cutter, and a control module is mounted in the rotating seat 7; milling cutter change process places the condition for the controller according to the cutter on the cutter places hole 8, place hole 8 with idle cutter and aim at under the cutter changing cover 10 soon, 3 descends the milling cutter that will mill on the blade holder 4 and inserts idle cutter and place hole 8 in, revolve cover 10 through the cutter changing and rotate, make the cutter changing cover 10 soon rotate the expansion, release milling cutter, telescopic link 3 raises afterwards, tool rest 6 removes, move new milling cutter to the cutter changing and revolve cover 10 under, telescopic link 3 descends, the cutter changing revolves cover 10 rotatory closure, the fixed milling cutter position, accomplish the cutter changing.

The second embodiment:

referring to fig. 1-5, the control module includes an image acquisition unit for milling cutter, a processor, an image deviation analysis unit, a tool tip controller and a settlement analysis unit, wherein the tool tip controller includes a plurality of sets of controllers for controlling the rotation of the tool changing rotary sleeve 10 and the movement of the tool holder 6 and the rotary base 7, respectively, and the processor is in bidirectional communication with the above units.

The milling cutter image acquisition unit acquires milling cutter images arranged on a cutter changing rotary sleeve 10 through an image acquisition device 11, the milling cutter image acquisition unit acquires images after milling cutter work is completed each time, when the milling cutter images are acquired, a sensor controls a milling cutter seat 4 to rotate 90 degrees every second until a rotation angle reaches 360 degrees, when the milling cutter rotates once, the image acquisition device 11 acquires images of the milling cutter once, three-dimensional figures of the milling cutter are synthesized according to images shot by two groups of image acquisition devices 11 at different angles, the three-dimensional figures are marked as analysis images after gray processing, the analysis images are sent to a processor, the processor receives the analysis images and sends the analysis images to an image deviation analysis unit, the image deviation analysis unit acquires the three-dimensional images of the cutter changing rotary sleeve 10 in the analysis images and marks the three-dimensional images as references, the image deviation analysis unit acquires a comparison image preset by a manager, acquires the position of a tool changing rotary sleeve 10 in the comparison image, marks the position as an overlapping point, enables the analysis image and the comparison image to be overlapped, completely overlaps the parts of the tool changing rotary sleeve 10 of the analysis image and the tool changing rotary sleeve 10 of the comparison image during overlapping, marks the missing part of a milling cutter part in the analysis image relative to the milling cutter part in the comparison image after overlapping, records the part as a wear layer, feeds the wear layer as an analysis result back to the processor, simultaneously sends the analysis result to the cutter head controller and the settlement analysis unit, the cutter head controller judges according to the analysis result, acquires the maximum wear thickness and the average wear thickness of the wear layer, and respectively compares the maximum wear thickness and the average wear thickness with the maximum wear threshold and the average wear threshold, if the average wear thickness is larger than the average wear threshold or the maximum wear thickness is larger than the maximum wear threshold, generating a milling cutter wear signal, if the average wear thickness is smaller than the average wear threshold and the maximum wear thickness is smaller than the maximum wear threshold, generating a milling cutter normal signal, after a cutter head control unit generates a milling cutter wear signal, acquiring cutter placing information in a cutter placing hole 8 from a processor, generating a cutter changing instruction according to the cutter placing information, completing milling cutter replacement, recording cutter changing times and cutter changing time intervals by a settlement analysis unit, comparing the cutter changing time intervals with a preset interval time threshold, and if the cutter changing time intervals of two continuous cutter changing are smaller than the preset interval time threshold, indicating that the wear speed of the milling cutter exceeds the wear speed in normal use, possibly generating a wear abnormal signal due to abnormal conditions of the numerical control milling machine, sending the wear abnormal signal to a manager through a network, and reminding the manager to perform inspection and maintenance on the numerical control milling machine.

According to the milling cutter replacement method, the cutter placing hole 8 is formed in the cutter frame 6, a plurality of milling cutters can be placed on the cutter frame 6, automatic milling cutter replacement is achieved through the movable cooperation of the cutter frame 6 and the telescopic rod 3, the automation degree of equipment is improved, the labor cost is reduced, a sensor in the cutter placing hole 8 can identify whether a milling cutter is in the hole or not and whether the milling cutter is a new milling cutter or a waste milling cutter or not, accurate replacement of the milling cutter is facilitated, images of the milling cutter are simultaneously acquired from different angles through the plurality of groups of image acquisition devices 11, the images of the milling cutter from multiple angles are combined, the three-dimensional image of the milling cutter can be accurately acquired, the three-dimensional image is compared with a preset milling cutter image, the wear degree of the milling cutter is judged, the milling cutter can be replaced in time when the wear degree of the milling cutter is too high, damage to workpieces or equipment due to continuous use of the milling cutter with damaged surface layer is prevented, the replacement times and replacement intervals of the milling cutter are analyzed through the settlement analysis unit, the abnormal milling cutter replacement frequency can be timely discovered, the abnormal conditions of the milling cutter replacement frequency can be indirectly reflected, the rapid wear phenomenon caused by abnormal conditions of equipment, and the milling cutter replacement state of the milling cutter can be timely well checked by a manager.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims (8)

1. The intelligent milling head monitoring and replacing equipment for the numerical control milling machine comprises a bottom plate (1) and is characterized in that a supporting rod (2) is fixedly mounted on the upper surface of the bottom plate (1), a telescopic rod (3) is fixedly mounted at the top end of the supporting rod (2), a cross rod is fixedly mounted on the upper surface of the telescopic rod (3), and a milling cutter seat (4) is rotatably connected below one end, far away from the telescopic rod (3), of the cross rod;

the milling cutter holder (4) lower surface rotates and is connected with cutter changing and revolves cover (10), cutter changing revolves cover (10) internally mounted has a axle stator motor, bottom plate (1) upper surface fixed mounting has slide plate (5), slide plate (5) are located milling cutter holder (4) under, the multiunit spout has been seted up to slide plate (5) upper surface, slide plate (5) have tool rest (6) and roating seat (7) through this spout sliding connection, be located the both ends of slide plate (5) respectively under tool rest (6) and roating seat (7) initial condition, tool rest (6) upper surface has been seted up the cutter and has been placed hole (8), roating seat (7) have three-jaw chuck (9) towards the one end fixed mounting of tool rest (6), roating seat (7) upper surface fixed mounting has at least two sets of image acquisition equipment (11), the orientation of image acquisition equipment (11) is directional axle center under revolves cover (10) extension line department, the tool rest hole (8) internally mounted has the sensor, roating seat (7) internally mounted has control module.

2. The intelligent milling head monitoring and replacing equipment for the numerically controlled milling machine according to claim 1, wherein the control module comprises a milling cutter image acquisition unit, a processor, an image deviation analysis unit, a milling head controller and a settlement analysis unit, the milling head controller comprises a plurality of sets of controllers, the plurality of sets of controllers are respectively used for controlling the rotation of the milling cutter rotary sleeve (10) and the movement of the tool holder (6) and the rotary seat (7), and the processor is in bidirectional communication with the units.

3. The milling head intelligent monitoring and replacing device for the numerically controlled milling machine according to claim 1, wherein the milling cutter image acquisition unit acquires a milling cutter image installed on the milling cutter changing rotary sleeve (10) through the image acquisition device (11), performs gray processing on the acquired image to obtain an analysis image, and transmits the analysis image to the processor, the processor receives the analysis image and transmits the analysis image to the image deviation analysis unit, the image deviation analysis unit acquires the analysis image, selects a part where the milling cutter changing rotary sleeve (10) is located in the analysis image as a reference point, acquires a preset milling cutter standard part image, records the analysis image as a comparison image, compares the analysis image with the standard image, feeds back an analysis result to the processor, the processor simultaneously transmits the analysis result to the milling cutter controller and the settlement analysis unit, the milling cutter controller judges according to the analysis result and generates a milling cutter wear signal or a milling cutter normal signal, and the milling cutter controller generates a milling cutter wear signal and then transmits a milling cutter replacement command to the milling cutter controller.

4. The milling head intelligent monitoring and replacing device for the numerically controlled milling machine according to claim 3, wherein the milling cutter image acquisition unit acquires an image after the milling cutter is finished each time, the milling cutter image acquisition unit controls the milling cutter holder (4) to rotate 90 degrees per second through the sensor until the rotation angle reaches 360 degrees, the image acquisition device (11) acquires an image of the milling cutter each time the milling cutter rotates once, a three-dimensional figure of the milling cutter is synthesized according to images shot by two groups of image acquisition devices (11) at different angles, the three-dimensional figure is marked as an analysis image after the three-dimensional figure is subjected to gray scale processing, and the analysis image is sent to the processor.

5. The milling head intelligent monitoring and replacing device for the numerically controlled milling machine according to claim 4, wherein the image deviation analysis unit acquires a three-dimensional stereoscopic image of the cutter changing sleeve (10) in the analysis image and marks the three-dimensional stereoscopic image as a reference, the image deviation analysis unit acquires a contrast image preset by an administrator, acquires the position of the cutter changing sleeve (10) in the contrast image and marks the position as a coincidence point, so that the analysis image and the contrast image are overlapped, the parts of the cutter changing sleeve (10) in the analysis image and the cutter changing sleeve (10) in the contrast image are completely coincided when the analysis image and the contrast image are overlapped, the part of the analysis image, which is missing relative to the part of the milling cutter in the contrast image, is marked after the superposition, and the part is recorded as a wear layer.

6. The intelligent milling head monitoring and replacing device for the numerically controlled milling machine according to claim 2, wherein the tool bit control unit analyzes the wear layer, obtains a maximum wear thickness and an average wear thickness of the wear layer, compares the maximum thickness and the average thickness with a maximum wear threshold and an average wear threshold, respectively, generates a milling cutter wear signal if the average wear thickness is greater than the average wear threshold or the maximum wear thickness is greater than the maximum wear threshold, and generates a milling cutter normal signal if the average wear thickness is less than the average wear threshold and the maximum wear thickness is less than the maximum wear threshold;

and after the cutter head control unit generates a milling cutter abrasion signal, the cutter placing information in the cutter placing hole (8) is obtained from the processor, and a cutter changing instruction is generated according to the cutter placing information to finish the milling cutter replacement.

7. The intelligent milling head monitoring and replacing device as claimed in claim 1, wherein the settlement analysis unit records the number of tool changes and the tool change time interval, compares the tool change time interval with a preset interval time threshold, generates an abnormal wear signal if the tool change time interval of two consecutive tool changes is less than the preset interval time threshold, and sends the abnormal wear signal to the administrator device through a network.

8. The intelligent monitoring and replacing equipment for the milling head of the numerically controlled milling machine according to any one of claims 1 to 7, wherein the intelligent monitoring and replacing method for the milling head of the numerically controlled milling machine is suitable for the intelligent monitoring and replacing equipment for the milling head of the numerically controlled milling machine, and comprises the following steps:

firstly, the method comprises the following steps: the method comprises the following steps that an image acquisition device (11) acquires an image of a milling cutter installed on a milling cutter seat (4), processes the image of the milling cutter and sends the processed image to an image deviation analysis unit, the image deviation analysis unit analyzes an analysis image and a comparison image, an abraded part in the analysis image is acquired, and the abraded part is sent to a cutter head controller;

II, secondly: the cutter head controller evaluates the worn part, judges whether the milling cutter needs to be replaced, and generates a corresponding signal or command to drive the controller to work;

thirdly, the method comprises the following steps: the controller aligns the free cutter placing hole (8) to the position right below the cutter changing rotary sleeve (10) according to the cutter placing condition on the cutter placing hole (8), the telescopic rod (3) descends to insert the milling cutter on the milling cutter seat (4) into the free cutter placing hole (8), and the cutter changing rotary sleeve (10) rotates to expand and release the milling cutter through the rotation of the cutter changing rotary sleeve (10);

fourthly, the method comprises the following steps: the telescopic rod (3) is lifted, the tool holder (6) moves, a new milling cutter is moved to the position right below the cutter changing rotary sleeve (10), the telescopic rod (3) descends, the cutter changing rotary sleeve (10) rotates to be closed, the position of the milling cutter is fixed, and cutter changing is completed;

fifthly: and the settlement analysis unit counts the times of cutter changing and the cutter changing interval, and sends a signal to an administrator to remind the administrator to check the equipment when the cutters are continuously and frequently changed.

Images