CN218470424U

CN218470424U - On-line detection device for abrasion of front cutter face of shearing blade of block shearing machine

Info

Publication number: CN218470424U
Application number: CN202221700225.4U
Authority: CN
Inventors: 胡和荣; 王志明; 宫衍升; 张�杰; 王凤成; 吴海燕; 徐艳艳; 陈静君
Original assignee: Jiangsu Dalongkai Technology Co ltd
Current assignee: Jiangsu Dalongkai Technology Co ltd
Priority date: 2022-07-04
Filing date: 2022-07-04
Publication date: 2023-02-10
Anticipated expiration: 2032-07-04

Abstract

The utility model discloses a shearing blade rake face wearing and tearing on-line measuring device of blocking cutter, including setting up the stationary blade detection benchmark flat board in the last blade holder side position of installing the movable blade, set up the central air vent in the dull and stereotyped front central point of stationary blade detection benchmark, from the first constant pressure air supply line of stationary blade detection benchmark flat board back one side connection central air vent, set up the first gas flow sensor on first constant pressure air supply line, stationary blade detection benchmark flat board is located the top of movable blade in last blade holder side, the front of stationary blade detection benchmark flat board is located the shearing plane that movable blade and stationary blade formed to shearing each other, first gas flow sensor connects the control system of blocking cutter; the front face of the fixed blade detection reference flat plate is a face far away from the side face of the upper tool apron. The utility model discloses realize shearing blade rake face wearing and tearing on-line automatic monitoring, and then improve the operational reliability of piecemeal cutter.

Description

On-line detection device for abrasion of front cutter face of shearing blade of block shearing machine

Technical Field

The utility model relates to a cutter technical field, concretely relates to piece cutter's shearing blade rake face wearing and tearing on-line measuring device.

Background

The shearing machine is a mechanical device for shearing waste steel. The recycled waste steel is cut into materials with uniform specifications, so that the waste steel is greatly convenient to recycle.

Generally, different types of shearing machines are used according to different types and specifications of materials to be sheared. The block shearing machine as one kind of shearing machine includes mainly block shearing part and feeding part matching with the block shearing part. The block shearing component is arranged on the transverse horizontal guide rail and can move along the transverse direction (namely the direction vertical to the feeding direction), an upper cutter holder and a lower cutter holder capable of shearing up and down are arranged on the block shearing component, and the shearing blades on the upper cutter holder and the lower cutter holder are L-shaped shearing blades. When the shearing machine works, the L-shaped shearing blade on the lower cutter seat is fixed, the feeding component sends waste steel to be sheared to the lower cutter seat, the L-shaped shearing blade is driven to move downwards by the downward movement of the upper cutter seat, the mutual up-and-down shearing of the L-shaped shearing blade is realized, and the waste steel is sheared into a smaller rectangular block shape; when a small piece of waste material is sheared, the block shearing component moves for a certain distance along the horizontal guide rail, and the rest part of the waste steel material on the lower cutter holder is continuously cut; after all the waste steel on the lower tool apron is sheared, the block shearing component moves to reset to the original position, then the feeding component feeds the waste steel again, and the block shearing component repeats the shearing action, so that the continuous block shearing of the block shearing machine is realized. In order to improve the reliability of the shearing work, a material pressing mechanism is usually arranged on the block shearing component, and the waste steel to be sheared is pressed by the material pressing mechanism before each cutting and then is sheared.

The block shearing machine has the following problems in the using process: the block shearing machine has the advantages that the block shearing machine is in a working mode of block shearing, so that the working frequency of the shearing blade on the block shearing machine is high, the cutting force of shearing operation is large, the impact is large, the material of waste steel to be sheared can be difficult to machine, the shape of the waste steel is irregular, and the like, so that the working condition of the shearing blade is poor, and the abrasion failure of the shearing blade is easily caused. Especially, the front face of the shearing blade can generate strong friction with waste steel in the shearing process, the abrasion speed is high, when the front face of the shearing blade is greatly abraded, the front face of the shearing blade needs to be replaced in time, otherwise, the working condition of the shearing blade is seriously deteriorated, and the service life of the whole block shearing machine equipment can be possibly damaged.

At present, the wear condition of the front cutter face of the shearing blade on the shearing machine is judged mainly by means of regular observation of the shearing blade by an operator and empirical judgment, so that the possibility of missing detection and false detection exists. Therefore, it is a technical problem to be solved by those skilled in the art to develop a device capable of realizing online automatic monitoring of the wear of the rake face of the shear blade.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a piece cutter's shearing blade rake face wearing and tearing on-line measuring device aims at realizing shearing blade rake face wearing and tearing on-line automatic monitoring, and then improves piece cutter's operational reliability. The specific technical scheme is as follows:

the block shearing machine comprises a shearing platform, a single-arm portal frame arranged above the shearing platform and connected with the shearing platform, a lower cutter holder arranged on the shearing platform, a fixed cutter arranged on the upper side surface of the lower cutter holder, an upper cutter holder arranged on the single-arm portal frame and capable of moving up and down, and a movable cutter arranged on the lower side surface of the upper cutter holder; when the upper tool apron moves downwards, the movable blade of the upper tool apron and the fixed blade on the lower tool apron form mutual shearing motion in the vertical direction, and the front tool face of the movable blade and the front tool face of the fixed blade face each other when the movable blade and the fixed blade are in a mutual shearing state; the shearing blade front cutter face abrasion online detection device comprises a fixed blade abrasion detection device used for detecting abrasion of the fixed blade front cutter face, the fixed blade abrasion detection device comprises a fixed blade detection reference flat plate arranged at the side face of an upper cutter seat provided with the movable blade, a central air vent arranged at the central position of the front face of the fixed blade detection reference flat plate, a first constant-pressure air supply pipeline connected with the central air vent from one side of the back face of the fixed blade detection reference flat plate, and a first gas flow sensor arranged on the first constant-pressure air supply pipeline, wherein the fixed blade detection reference flat plate is positioned above the movable blade at the side face of the upper cutter seat, the front face of the fixed blade detection reference flat plate is positioned on a shearing plane formed by mutual shearing of the movable blade and the fixed blade, and the first gas flow sensor is connected with a control system of a block shearing machine; the front face of the fixed blade detection reference flat plate is a face far away from the side face of the upper tool apron.

In the utility model, the shearing blade rake face wear online detection device further comprises a moving blade wear detection device for detecting the wear of the moving blade rake face, the moving blade wear detection device comprises a moving blade detection reference flat plate arranged at the inner side position of the upper part of the single-arm portal frame, a central air vent arranged at the central position of the front face of the moving blade detection reference flat plate, a second constant-pressure air supply pipeline connected with the central air vent from one side of the back face of the moving blade detection reference flat plate, and a second gas flow sensor arranged on the second constant-pressure air supply pipeline and connected with the control system, wherein the front face of the moving blade detection reference flat plate is positioned on a shearing plane formed by mutual shearing of the moving blade and the fixed blade; the front face of the movable blade detection reference flat plate faces the side face of the upper cutter holder provided with the movable blade.

In the utility model, the fixed blade is an L-shaped fixed blade, the L-shaped fixed blade comprises a pair of rectangular blades which are vertically butted with each other, and the pair of rectangular blades are respectively arranged on the side surfaces of two adjacent and mutually vertical lower knife rests of the lower knife rest; the fixed blade detection reference flat plate comprises a pair of rectangular flat plates which are vertically butted with each other, and the pair of rectangular flat plates are respectively and correspondingly arranged on the two adjacent and mutually vertical upper tool apron side surfaces of the upper tool apron.

Preferably, the contour rectangle of the front face of the rectangular flat plate and the contour rectangle of the rectangular blade rake face are identical to each other, and the contour rectangle of the front face of the rectangular flat plate can be moved to a position completely aligned with the contour rectangle of the rectangular blade rake face on the lower tool apron by the up-and-down movement of the upper tool apron.

In the utility model, the movable blade is an L-shaped movable blade, the L-shaped movable blade comprises a pair of parallelogram blades which are vertically butted with each other, and the pair of parallelogram blades are respectively arranged on two adjacent and mutually vertical upper tool apron sides at the lower part of the upper tool apron; the movable blade detection reference flat plate comprises a pair of parallelogram flat plates which are mutually vertically butted, and the parallelogram flat plates are respectively and correspondingly arranged on the inner side surfaces of two adjacent and mutually vertical single-arm portal frames on the inner side of the single-arm portal frame.

The utility model discloses in, the lower part cutting blade of a pair of parallelogram blade upwards inclines in proper order and sets up.

Preferably, the contour rectangle of the front face of the parallelogram flat plate and the contour rectangle of the parallelogram blade rake face are identical to each other, and the contour rectangle of the front face of the parallelogram flat plate can be moved to a position completely aligned with the contour rectangle of the parallelogram blade rake face on the lower tool apron by the up-and-down movement of the upper tool apron.

In order to improve the precision and the sensitivity of the abrasion detection of the front cutter face of the shearing cutter blade, the further improvement scheme is as follows: the rectangular flat plate is also provided with a plurality of peripheral air vents distributed at intervals on the periphery of the central air vent of the rectangular flat plate, the back of the rectangular flat plate is provided with a first air collecting box communicated with the central air vent and the peripheral air vents on the rectangular flat plate respectively, and the first constant-pressure air supply pipeline is connected to the first air collecting box.

Similarly, a plurality of peripheral air vents are arranged on the parallelogram flat plate at intervals and distributed on the periphery of the central air vent of the parallelogram flat plate, a second air collecting box communicated with the central air vent and the peripheral air vent on the parallelogram flat plate is arranged on the back of the parallelogram flat plate, and the second constant-pressure air supply pipeline is connected to the second air collecting box.

The utility model discloses in, the first inside four corners position of single armed portal frame is fixed respectively and is provided with vertical guide rail, go up the blade holder and reciprocate the setting four vertical guide rail between, the flat horizontal fixation of blade detection benchmark is in between the two adjacent vertical guide rails of single armed portal frame.

In order to enable the two ends of the parallelogram flat plate to extend to be equal to the corresponding parallelogram blades, the vertical guide rail is transversely provided with installation positioning grooves for fixing the two ends of the parallelogram flat plate.

The utility model discloses in, shear blade rake face wearing and tearing on-line measuring device's detection method as follows:

(1) Preparation before detection: before detection, the control system is connected with the first constant-pressure air supply pipeline and the second constant-pressure air supply pipeline in advance to provide constant-pressure air flow for the first gas collecting box and the second gas collecting box;

(2) And (3) wear detection and replacement of the front cutter face of the fixed cutter: in an idle state, the control system controls the upper tool apron to move downwards, so that the front surfaces of a pair of rectangular flat plates on the upper tool apron correspondingly face the rake surfaces of a pair of rectangular blades on the lower tool apron respectively, and the outer contour of the front surface of each rectangular flat plate is completely aligned with the outer contour of the rake surface of each rectangular blade; after passing through a central vent hole and a peripheral vent hole on the rectangular flat plate, constant-pressure air flow in the first air collecting box leaks out from a gap between the front surface of the rectangular flat plate and the front cutter face of the rectangular blade; the control system acquires the leakage amount of air flow according to a first air flow sensor arranged on a first constant-pressure air supply pipeline, and when the abrasion amount of the front cutter face of the rectangular blade is large, the gap between the front face of the rectangular flat plate and the front cutter face of the rectangular blade is increased, and further the leakage amount of the air flow between the front face of the rectangular flat plate and the front cutter face of the rectangular blade exceeds a preset threshold value, the control system gives an alarm to remind equipment maintenance personnel of replacing the rectangular blade;

(3) Detecting and replacing the wear of the front cutter face of the movable cutter blade: in an idle state, the control system controls the upper tool apron to move upwards, so that the front faces of a pair of parallelogram plates on the single-arm portal frame are correspondingly aligned to the front tool faces of a pair of parallelogram blades on the upper tool apron respectively, and the outline of the front faces of the parallelogram plates is completely aligned with the outline of the front tool faces of the parallelogram blades; after passing through a central vent hole and peripheral vent holes on the parallelogram flat plate, constant-pressure airflow in the second gas collecting box leaks out from a gap between the front surface of the parallelogram flat plate and the front cutter face of the parallelogram blade; the control system learns the leakage amount of the air flow according to a second air flow sensor arranged on a second constant-pressure air supply pipeline, when the abrasion loss of the front face of the parallelogram blade is large, the gap between the front face of the parallelogram flat plate and the front face of the parallelogram blade is increased, and further when the air flow leakage amount between the front face of the parallelogram flat plate and the front face of the parallelogram blade exceeds a preset threshold value, the control system gives an alarm to remind equipment maintenance personnel of replacing the parallelogram blade.

Preferably, the control system detects the wear condition of the front tool face of the shearing blade once when the block shearing machine is started up every time.

Preferably, the control system automatically sets the time interval of the online detection of the wear of the front cutter face of the shearing blade, temporarily cuts in the midway after the continuous shearing time of the block shearing machine reaches the set time interval, then detects the wear condition of the front cutter face of the shearing blade once, continues shearing when the detection is qualified (the wear amount of the front cutter face of the shearing blade does not exceed a set value), and sends an alarm when the detection is unqualified (the wear amount of the front cutter face of the shearing blade exceeds the set value) to remind equipment maintenance personnel to replace the shearing blade.

The beneficial effects of the utility model are that:

first, the utility model discloses a piece shear cutter's shearing blade rake face wearing and tearing on-line measuring device utilizes the gas leakage principle to realize the automatic integrated detection and the aassessment of online of shearing blade rake face wearing and tearing volume to can accurately reflect the actual conditions of shearing blade rake face wearing and tearing, and overcome in the past that operating personnel adopted the experience judgment method to exist and leaked the possible drawback of examining and the false retrieval, the operational reliability of piece shear has been improved from this, and then the life of piece shear has been improved, the maintenance work volume of equipment has been reduced.

Second, the utility model discloses a piece shear cutter's shearing blade rake face wearing and tearing on-line measuring device, the position setting that detects benchmark flat board (rectangle flat board) and moving blade and detect benchmark flat board (parallelogram flat board) to the stationary blade has optimized, the stationary blade of this position detects benchmark flat board (rectangle flat board) and moving blade and has detected benchmark flat board (parallelogram flat board) and has avoided the continuous shearing in-process of cutter completely with the friction of shearing the material, it does not wear and tear for a long time to have guaranteed stationary blade and has detected benchmark flat board (rectangle flat board) and moving blade and detect benchmark flat board (parallelogram flat board).

Third, the utility model discloses a piece shear cutter's shearing blade rake face wearing and tearing on-line measuring device can realize comparatively nimble on-line measuring mode, can start at every turn and carry out the self-checking of shearing blade rake face wearing and tearing, also can cut the self-checking of blade rake face wearing and tearing midway of process in succession to the normal operating of piece shear cutter equipment has been guaranteed.

Drawings

Fig. 1 is a schematic structural view of an on-line detecting device for the wear of the front face of the shearing blade of the block shearing machine of the present invention;

FIG. 2 is an enlarged partial view of FIG. 1;

FIG. 3 is a top view of the portion of FIG. 1 relating to the shear platform;

FIG. 4 is a schematic view of the movable blade and the stationary blade of FIG. 1 cut in a vertical direction;

FIG. 5 is a schematic view of the structure of the upper tool post of FIG. 1 provided with a fixed blade wear detecting device;

FIG. 6 is a schematic structural diagram of the stationary blade detection reference plate (rectangular plate) of FIG. 5 with peripheral air vents added;

fig. 7 is a schematic structural view of a gas collecting box arranged on the back of a fixed blade detection reference plate (rectangular plate) or a movable blade detection reference plate (parallelogram plate);

fig. 8 is a schematic structural view of the movable blade detection reference plate (parallelogram plate) in fig. 2, which is further added with peripheral air holes.

In the figure: 1. the shearing platform, 2, the single armed portal frame, 3, the lower tool apron, 4, the stationary blade (L type stationary blade), 5, the upper tool apron, 6, the movable blade (L type movable blade), 7, the rake face of the movable blade, 8, the rake face of the stationary blade, 9, the stationary blade abrasion detection device, 10, the stationary blade detection reference flat plate (rectangular flat plate), 11, the central vent hole, 12, the first constant pressure air supply pipeline, 13, the first gas flow sensor, 14, the base (rectangular flat plate), 15, the shearing plane, 16, the movable blade abrasion detection device, 17, the movable blade detection reference flat plate (parallelogram flat plate), 18, the second constant pressure air supply pipeline, 19, the second gas flow sensor, 20, the rectangular blade, 21, the parallelogram blade, 22, the peripheral vent hole, 23, the first gas collection box, 24, the second gas collection box, 25, the vertical guide rail, 26, the installation constant head tank.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

Fig. 1 to 8 show an embodiment of the online detecting device for the wear of the front face of the cutting blade of the block shearing machine of the present invention, the block shearing machine includes a shearing platform 1, a single-arm portal frame 2 disposed above the shearing platform 1 and connected to the shearing platform 1, a lower blade seat 3 disposed on the shearing platform 1, a stationary blade 4 disposed on the upper side of the lower blade seat 3, an upper blade seat 5 disposed on the single-arm portal frame 2 and capable of moving up and down, and a moving blade 6 disposed on the lower side of the upper blade seat 5; when the upper tool apron 5 moves downwards, the movable blade 6 of the upper tool apron 5 and the fixed blade 4 on the lower tool apron 3 form mutual shearing movement in the vertical direction, and the front tool face of the movable blade 5 and the front tool face of the fixed blade 4 face each other when the movable blade 6 and the fixed blade 4 are in a mutual shearing state; the shearing blade front cutter face abrasion online detection device comprises a fixed blade abrasion detection device 9 for detecting abrasion of a front cutter face of a fixed blade 4, wherein the fixed blade abrasion detection device 9 comprises a fixed blade detection reference flat plate 10 arranged at the side face of an upper cutter holder 5 provided with the movable blade 6, a central vent hole 11 arranged at the central position of the front face of the fixed blade detection reference flat plate 10, a first constant-pressure air supply pipeline 12 connected with the central vent hole 11 from one side of the back face of the fixed blade detection reference flat plate 10, and a first gas flow sensor 13 arranged on the first constant-pressure air supply pipeline 12, the fixed blade detection reference flat plate 10 is positioned above the movable blade 6 at the side face of the upper cutter holder 5, the front face of the fixed blade detection reference flat plate 10 is positioned on a shearing plane 15 formed by mutual shearing of the movable blade 6 and the fixed blade 4, and the first gas flow sensor 13 is connected with a control system of a block shearing machine; the front surface of the fixed blade detection reference flat plate 10 is a surface far away from the side surface of the upper tool apron 5.

In this embodiment, the shearing blade rake face wear online detection device further comprises a moving blade wear detection device 16 for detecting wear of the moving blade 6 rake face, the moving blade wear detection device comprises a moving blade detection reference flat plate 17 arranged at an inner side position of an upper portion of the single-arm gantry 2, a central vent hole 11 formed in a center position of a front face of the moving blade detection reference flat plate 17, a second constant-pressure air supply pipeline 18 connected with the central vent hole 11 from one side of a back face of the moving blade detection reference flat plate 17, and a second air flow sensor 19 arranged on the second constant-pressure air supply pipeline 18 and connected with the control system, wherein a front face of the moving blade detection reference flat plate 17 is positioned on a shearing plane 15 formed by mutual shearing of the moving blade 6 and the fixed blade 4; the front surface of the movable blade detection reference flat plate 17 faces the side surface of the upper tool apron 5 provided with the movable blade 6.

In this embodiment, the fixed blade 4 is an L-shaped fixed blade, the L-shaped fixed blade 4 includes a pair of rectangular blades 20 vertically butted with each other, and the pair of rectangular blades 20 are respectively disposed on two adjacent and mutually vertical side surfaces of the lower tool apron 3; the fixed blade detection reference flat plate 10 comprises a pair of rectangular flat plates 10 which are vertically butted with each other, and the pair of rectangular flat plates 10 are respectively and correspondingly arranged on the side surfaces of two adjacent and mutually vertical upper tool rests 5 of the upper tool rest 5.

Preferably, the contour rectangle of the front surface of the rectangular flat plate 10 and the contour rectangle of the rake surface of the rectangular insert 20 are identical to each other, and the contour rectangle of the front surface of the rectangular flat plate 10 can be moved to a position completely aligned with the contour rectangle of the rake surface of the rectangular insert 20 on the lower holder 3 by the up-and-down movement of the upper holder 5.

In this embodiment, the movable blade 6 is an L-shaped movable blade 6, the L-shaped movable blade 6 includes a pair of parallelogram blades 21 that are vertically butted with each other, and the pair of parallelogram blades 21 are respectively disposed on two adjacent and mutually perpendicular side surfaces of the upper tool apron 6 at the lower part of the upper tool apron 5; the movable blade detection reference flat plate comprises a pair of parallelogram flat plates which are vertically butted with each other, and the parallelogram flat plates are respectively and correspondingly arranged on the inner side surfaces of two adjacent and mutually vertical single-arm portal frames on the inner side of the single-arm portal frame.

In this embodiment, the lower cutting edges of the pair of parallelogram blades 21 are sequentially inclined upward.

Preferably, the contour rectangle of the front surface of the parallelogram flat plate 17 and the contour rectangle of the rake surface of the parallelogram blade 21 are identical to each other, and the contour rectangle of the front surface of the parallelogram flat plate 17 can be moved to a position completely aligned with the contour rectangle of the rake surface of the parallelogram blade 21 on the lower tool rest 3 by the up-and-down movement of the upper tool rest 5.

In order to improve the precision and the sensitivity of the wear detection of the front cutter face of the shearing blade, the further improvement scheme is as follows: the rectangular flat plate 10 is further provided with a plurality of peripheral vent holes 22 distributed at intervals on the periphery of the central vent hole of the rectangular flat plate 10, the back of the rectangular flat plate 10 is provided with a first gas collecting box 23 respectively communicated with the central vent hole 11 and the peripheral vent holes 11 on the rectangular flat plate 10, and the first constant-pressure gas supply pipeline 12 is connected to the first gas collecting box 23.

Similarly, a plurality of peripheral air vents 22 are arranged on the parallelogram flat plate 17 and distributed at intervals on the periphery of the central air vent 11 of the parallelogram flat plate 17, a second air collecting box 24 communicated with the central air vent 11 and the peripheral air vents 22 on the parallelogram flat plate 17 is arranged on the back of the parallelogram flat plate 17, and the second constant pressure air supply pipeline 18 is connected to the second air collecting box 24.

In this embodiment, vertical guide rails 25 are respectively fixedly arranged at four inner corners of the upper half portion of the single-arm portal frame 2, the upper tool apron 3 is vertically moved between the four vertical guide rails 22, and the moving blade detection reference flat plate 17 is transversely fixed between two adjacent vertical guide rails 25 of the single-arm portal frame 2.

In order to make the two ends of the parallelogram flat plate 17 extend to be equal to the length of the corresponding parallelogram blade 21, the vertical guide rail 25 is transversely provided with installation positioning slots 26 for fixing the two ends of the parallelogram flat plate 27.

In this embodiment, the detection method of the online detection device for the wear of the rake face of the shear blade is as follows:

(1) Preparation before detection: before detection, the control system is connected with the first constant-pressure air supply pipeline 12 and the second constant-pressure air supply pipeline 18 in advance to provide constant-pressure air flow for the first air collecting box 23 and the second air collecting box 24;

(2) And (3) wear detection and replacement of the front cutter face of the fixed cutter: in an idle state, the control system controls the upper tool apron 5 to move downwards, so that the front faces of a pair of rectangular flat plates 10 on the upper tool apron 5 are correspondingly aligned with the front faces of a pair of rectangular blades 20 on the lower tool apron 3 respectively, and the outer contour of the front faces of the rectangular flat plates 10 is completely aligned with the outer contour of the front faces of the rectangular blades 20; after passing through the central vent hole 11 and the peripheral vent holes 22 on the rectangular flat plate 10, the constant-pressure air flow in the first air collecting box 23 leaks out from the gap between the front surface of the rectangular flat plate 10 and the rake surface of the rectangular blade 20; the control system acquires the leakage amount of the air flow according to a first air flow sensor 13 arranged on a first constant pressure air supply pipeline 12, and when the abrasion amount of the rake face of the rectangular blade 20 is large, the gap between the front face of the rectangular flat plate 20 and the rake face of the rectangular blade 20 is increased, and further the leakage amount of the air flow between the front face of the rectangular flat plate 10 and the rake face of the rectangular blade 20 exceeds a preset threshold value, the control system gives an alarm to remind equipment maintenance personnel to replace the rectangular blade 20;

(3) The wear detection and replacement of the front cutter face of the movable cutter blade are as follows: in an unloaded state, the control system controls the upper tool apron 5 to move upwards, so that the front faces of a pair of parallelogram flat plates 17 on the single-arm portal frame 2 are correspondingly aligned with the front faces of a pair of parallelogram blades 21 on the upper tool apron 5 respectively, and the outer contour of the front faces of the parallelogram flat plates 17 is completely aligned with the outer contour of the front faces of the parallelogram blades 21; after passing through the central vent hole 11 and the peripheral vent holes 22 on the parallelogram flat plate 17, the constant-pressure air flow in the second air collecting box 24 leaks out from the gap between the front surface of the parallelogram flat plate 17 and the front cutter surface of the parallelogram blade 21; the control system acquires the leakage amount of the air flow according to a second air flow sensor 19 arranged on a second constant pressure air supply pipeline 18, when the abrasion amount of the front face of the parallelogram blade 21 is large, the gap between the front face of the parallelogram flat plate 17 and the front face of the parallelogram blade 21 is increased, and further the air flow leakage amount between the front face of the parallelogram flat plate 17 and the front face of the parallelogram blade 21 exceeds a preset threshold value, the control system gives an alarm to remind an equipment maintainer of replacing the parallelogram blade 21.

Preferably, the control system automatically sets the time interval of online detection of the wear of the front cutter face of the shearing blade, temporarily cuts the front cutter face midway after the continuous shearing time of the block shearing machine reaches the set time interval, then detects the wear condition of the front cutter face of the shearing blade once, continues shearing when the detection is qualified (the wear amount of the front cutter face of the shearing blade does not exceed a set value), and sends an alarm when the detection is unqualified (the wear amount of the front cutter face of the shearing blade exceeds the set value) to remind an equipment maintainer of replacing the shearing blade.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The on-line detection device for the abrasion of the front cutter face of the shearing blade of the block shearing machine is characterized by comprising a shearing platform, a single-arm portal frame arranged above the shearing platform and connected with the shearing platform, a lower cutter holder arranged on the shearing platform, a fixed blade arranged on the upper side face of the lower cutter holder, an upper cutter holder arranged on the single-arm portal frame and capable of moving up and down, and a movable blade arranged on the lower side face of the upper cutter holder; when the upper tool apron moves downwards, the movable blade of the upper tool apron and the fixed blade on the lower tool apron form mutual shearing motion in the vertical direction, and the front tool face of the movable blade and the front tool face of the fixed blade face each other when the movable blade and the fixed blade are in a mutual shearing state; the shearing blade front cutter face abrasion online detection device comprises a fixed blade abrasion detection device used for detecting abrasion of the fixed blade front cutter face, the fixed blade abrasion detection device comprises a fixed blade detection reference flat plate arranged at the side face of an upper cutter seat provided with the movable blade, a central air vent arranged at the central position of the front face of the fixed blade detection reference flat plate, a first constant-pressure air supply pipeline connected with the central air vent from one side of the back face of the fixed blade detection reference flat plate, and a first gas flow sensor arranged on the first constant-pressure air supply pipeline, wherein the fixed blade detection reference flat plate is positioned above the movable blade at the side face of the upper cutter seat, the front face of the fixed blade detection reference flat plate is positioned on a shearing plane formed by mutual shearing of the movable blade and the fixed blade, and the first gas flow sensor is connected with a control system of a block shearing machine; the front face of the fixed blade detection reference flat plate is a face far away from the side face of the upper tool apron.

2. The on-line detection device for the wear of the rake face of the shearing blade of the block shearing machine according to claim 1, further comprising a movable blade wear detection device for detecting the wear of the rake face of the movable blade, wherein the movable blade wear detection device comprises a movable blade detection reference plate arranged at an inner side position of an upper portion of the single-arm portal frame, a central vent hole arranged at a center position of a front face of the movable blade detection reference plate, a second constant-pressure air supply pipeline connected with the central vent hole from one side of a back face of the movable blade detection reference plate, and a second gas flow sensor arranged on the second constant-pressure air supply pipeline and connected with the control system, wherein the front face of the movable blade detection reference plate is positioned on a shearing plane formed by mutual shearing of the movable blade and the fixed blade; the front face of the movable blade detection reference flat plate is the face facing the side face of the upper tool apron provided with the movable blade.

3. The on-line detecting device for detecting the wear of the rake face of the shear blade of a block shear according to claim 2, wherein the fixed blade is an L-shaped fixed blade, the L-shaped fixed blade comprises a pair of rectangular blades vertically butted with each other, and the pair of rectangular blades are respectively arranged on two adjacent and vertical lower blade seat side faces of the lower blade seat; the fixed blade detection reference flat plate comprises a pair of rectangular flat plates which are vertically butted with each other, and the pair of rectangular flat plates are respectively and correspondingly arranged on two adjacent and mutually vertical upper tool apron side surfaces of the upper tool apron.

4. The on-line wear detection device for the cutting blade rake surface of a block shear of claim 3, wherein the rectangular flat plate front profile rectangle and the rectangular blade rake surface profile rectangle are identical to each other, and the rectangular flat plate front profile rectangle can be moved to a position completely aligned with the rectangular blade rake surface profile rectangle on the lower blade holder by the up-and-down movement of the upper blade holder.

5. The on-line detection device for the wear of the rake face of the shear blade of the block shearing machine according to claim 4, wherein the movable blade is an L-shaped movable blade, the L-shaped movable blade comprises a pair of parallelogram blades vertically butted with each other, and the pair of parallelogram blades are respectively arranged on two adjacent and mutually vertical side faces of the upper tool apron at the lower part of the upper tool apron; the movable blade detection reference flat plate comprises a pair of parallelogram flat plates which are mutually vertically butted, and the parallelogram flat plates are respectively and correspondingly arranged on the inner side surfaces of two adjacent and mutually vertical single-arm portal frames on the inner side of the single-arm portal frame.

6. The apparatus of claim 5, wherein the rectangle of the parallelogram plate front face and the rectangle of the parallelogram blade front face are identical to each other, and the rectangle of the parallelogram plate front face can be moved to a position completely aligned with the rectangle of the parallelogram blade front face on the lower blade holder by moving the upper blade holder up and down.

7. The apparatus of claim 6, wherein the rectangular plate further comprises a plurality of peripheral air vents spaced apart from each other around the central air vent of the rectangular plate, the back of the rectangular plate is provided with a first air collection box respectively connected to the central air vent and the peripheral air vent of the rectangular plate, and the first constant pressure air supply line is connected to the first air collection box.

8. The apparatus of claim 7, wherein the parallelogram plate further comprises a plurality of peripheral air vents distributed at intervals around the central air vent of the parallelogram plate, a second air collecting box is disposed on the back of the parallelogram plate and is respectively communicated with the central air vent and the peripheral air vent of the parallelogram plate, and the second constant pressure air supply pipeline is connected to the second air collecting box.

9. The device for online detecting the wear of the rake face of the shearing blade of the block shearing machine according to claim 8, wherein vertical guide rails are respectively and fixedly arranged at four corners inside the upper half part of the single-arm portal frame, the upper tool apron is vertically moved between the four vertical guide rails, and the movable blade detection reference plate is transversely fixed between two adjacent vertical guide rails of the single-arm portal frame.