CN110465243B - Automatic blade adjusting mechanism and method for flaker - Google Patents
Automatic blade adjusting mechanism and method for flaker Download PDFInfo
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- CN110465243B CN110465243B CN201910865495.7A CN201910865495A CN110465243B CN 110465243 B CN110465243 B CN 110465243B CN 201910865495 A CN201910865495 A CN 201910865495A CN 110465243 B CN110465243 B CN 110465243B
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- blade
- blade assembly
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- rotary drum
- push rod
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/24—Obtaining flakes by scraping a solid layer from a surface
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- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
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Abstract
The application discloses an automatic blade adjusting mechanism of a flaker, which comprises a blade assembly, a distance sensor, a driving mechanism and a control mechanism; the blade assembly is used for scraping and cutting the material on the surface of the rotary drum into pieces; the distance sensor is used for measuring the distance between the blade assembly and the surface of the rotary drum after scraping the materials; the driving mechanism is used for driving the blade assembly to feed or retract so as to adjust the distance between the blade assembly and the surface of the rotary drum; the control mechanism controls the driving mechanism to drive the blade assembly to feed or retract according to the distance between the blade assembly and the surface of the rotary drum, which is measured by the distance sensor. The automatic blade adjusting mechanism of the flaker can automatically adjust the distance between the blade and the rotary drum in real time, so that blade abrasion caused by contact between the cutting edge of the blade and the outer surface of the rotary drum is avoided, the service life of the blade is prolonged, the replacement frequency of the blade is reduced, and the production cost is reduced. The application also discloses an automatic blade adjusting method of the flaker.
Description
Technical Field
The application relates to the technical field of flakers, in particular to an automatic adjustment mechanism for a flaker blade, and also relates to an automatic adjustment method for the flaker blade.
Background
The flaker is also called as a slicing machine and a flaker, and can be used for cooling and flaking high-temperature materials and drying and flaking low-temperature slurry.
The flaker consists of a frame, a housing, a transmission system, a cooling system, a feeding system, a scraping flaking system and an electric appliance control system. The molten material in the arc-shaped material groove is contacted with the cooled rotary drum, and the molten material is condensed on the surface of the rotary drum to form a material film. With the rotation of the rotary drum, heat is taken away by cooling liquid in the rotary drum, and the material film is scraped from the other side of the rotary drum by a scraper by adjusting the distance between the blade and the outer surface of the rotary drum, so that a sheet-shaped finished product is discharged.
The distance between the blade of the flaker and the outer surface of the rotary drum is generally controlled to be between 0.1mm and 0.15mm, if the distance between the blade and the rotary drum is too short, the blade is easy to scratch the rotary drum and is severely worn, and if the distance between the blade and the rotary drum is too long, the surface fabric film of the rotary drum cannot be scraped completely, so that the control of the distance between the blade of the flaker and the outer surface of the rotary drum is particularly important.
The diameter of the rotary drum of the flaker generally reaches more than 2m, the radius of different positions of the outer surface of the rotary drum in the circumferential direction has certain deviation under the influence of manufacturing errors, the distance between the blade and the outer surface of the rotary drum is very small, even if the initial distance between the blade and the outer surface of the rotary drum is accurately adjusted, the blade and the rotary drum can be contacted and worn due to the radius deviation of the rotary drum in the rotating process of the rotary drum, which is a very important reason for blade wearing, the existing flaker does not well solve the problem of rapid blade wearing, the blade needs to be replaced frequently, and the maintenance cost is high.
Disclosure of Invention
Aiming at the defects in the prior art, the application provides an automatic blade adjusting mechanism and an automatic blade adjusting method for a flaker, which are used for automatically adjusting the distance between a blade and a rotary drum in real time, so that the blade abrasion caused by the contact between the edge of the blade and the outer surface of the rotary drum is avoided, the service life of the blade is prolonged, the replacement frequency of the blade is reduced, and the production cost is reduced.
In one aspect, the present application provides an automatic adjustment mechanism for a blade of a sheeting machine, comprising: the blade assembly is arranged on the frame of the flaker and is used for scraping and cutting materials on the surface of the rotary drum into flakes; the distance sensor is arranged on one side, close to the rotary drum, of the blade assembly and is used for measuring the distance between the blade assembly and the surface of the rotary drum after scraping materials; the driving mechanism is used for driving the blade assembly to feed or retract so as to adjust the distance between the blade assembly and the surface of the rotary drum; and the control mechanism controls the driving mechanism to drive the blade assembly to feed or retract according to the distance between the blade assembly and the surface of the rotary drum, which is measured by the distance sensor, so that the distance between the blade assembly and the surface of the rotary drum is always kept at a set value.
Further, the distance sensor is specifically a grating ruler.
Further, the grating chi includes base, slider, grating chi read head, grating chi body, push rod and reset spring, the base is fixed on the blade subassembly, has the inner chamber in the base, slider slidable mounting is in the base, the grating chi read head is fixed on the slider, the grating chi body is located in the base along the gliding direction of grating chi read head, the rear end of push rod links to each other with the slider, and the front end of push rod wears out the base and offsets with the rotary drum surface after scraping the material, reset spring supports between one side that the push rod was kept away from to the slider and base.
Further, a roller is arranged at the front end of the push rod, and the front end of the push rod is in rolling contact with the surface of the rotary drum through the roller.
Further, a brush is further arranged at the front end of the push rod, and the brush is in contact with the peripheral surface of the roller.
Further, the front end of the push rod is axially provided with a first chute, a brush seat and a first compression spring supported between the brush seat and the bottom of the first chute are slidably arranged in the first chute, and the brush is planted on the front side of the brush seat.
Further, the base is further provided with a linear bearing, and the push rod is adapted to the linear bearing.
Further, a second chute for accommodating the base is formed in the rear side of the blade assembly, a through hole which is communicated with the front side of the blade assembly and is used for the linear bearing to pass through is formed in the bottom of the second chute, a second compression spring which is supported between the base and the bottom of the second chute is sleeved on the linear bearing, and a plug is connected with the rear end of the second chute in an internal thread mode.
Further, the control structure is a PLC, the driving mechanism is a servo cylinder, the blade assembly comprises a blade rest arranged on a frame of the flaker through a rotating shaft and a blade arranged on the blade rest and used for scraping and cutting materials on the surface of the rotary drum into pieces, and the servo cylinder is used for driving the blade rest to rotate around the rotating shaft so as to realize feeding or withdrawal of the blade assembly.
On the other hand, the application also provides a blade automatic adjusting method of the flaker, which adopts the blade automatic adjusting mechanism of the flaker and comprises the following steps:
step one: the distance sensor measures the distance L1 between the blade assembly and the surface of the drum after scraping the materials, and feeds the distance L1 back to the control mechanism;
step two: the control mechanism compares the data L1 measured by the distance sensor with a set value L of the distance between the blade assembly and the surface of the rotary drum, if L1 is larger than L, the control mechanism outputs a signal to control the driving mechanism to drive the blade assembly to feed until L1=L, if L1 is smaller than L, the control mechanism outputs a signal to control the driving mechanism to drive the blade assembly to retract until L1=L, and if L1=L, the driving mechanism maintains the distance between the blade assembly and the surface of the rotary drum unchanged.
The beneficial effects of the application are as follows: the distance between the blade assembly and the surface of the rotary drum is measured by the distance sensor and is sent to the control mechanism, and the control mechanism judges the feeding or withdrawal of the cutter according to the distance measured by the distance sensor and controls the driving mechanism to perform corresponding movement. In the process of rotating the rotary drum, when the area of the rotary drum protruding outwards relative to the standard circle passes through the blade assembly, the distance between the blade assembly and the surface of the rotary drum is measured by the distance sensor to be smaller, at the moment, the driving mechanism drives the blade assembly to retract until the distance between the blade assembly and the surface of the rotary drum returns to a set value, when the area of the rotary drum recessed inwards relative to the standard circle passes through the blade assembly, the distance between the blade assembly and the surface of the rotary drum is measured by the distance sensor to be larger, at the moment, the driving mechanism drives the blade assembly to feed until the distance between the blade assembly and the surface of the rotary drum returns to the set value.
Therefore, the automatic blade adjusting mechanism of the flaker automatically adjusts the distance between the blade and the rotary drum in real time in the slicing process, so that the blade and the rotary drum always keep the optimal slicing distance, the problems of contact and abrasion between the blade and the rotary drum caused by radius deviation of the rotary drum at different positions are solved, the service life of the blade is prolonged, the replacement frequency of the blade is reduced, and the production cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
FIG. 1 is a schematic diagram of an embodiment of the present application;
fig. 2 is a partial enlarged view of a portion a of fig. 1;
fig. 3 is a schematic structural diagram of a grating ruler according to an embodiment of the present application.
In the drawings, 1 denotes a blade assembly; 11 denotes a tool holder; 12 denotes a blade; 13 denotes a rotation shaft; 2 represents a distance sensor; 21 denotes a base; 22 denotes a slider; 23 denotes a grating scale reading head; 24 denotes a grating scale body; 25 denotes a push rod; 26 denotes a return spring; 27 denotes a roller; 28 denotes a brush; 29 denotes a first runner; 210 denotes a brush holder; 211 denotes a first compression spring; 212 denotes a linear bearing; 213 denotes a second runner; 214 denotes a through hole; 215 denotes a second compression spring; 216 denotes a plug; 3 denotes a driving mechanism; 4 represents a frame; 5 denotes a drum.
Detailed Description
Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.
It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs.
As shown in fig. 1-3, an embodiment of the present application provides an automatic blade adjusting mechanism of a sheeting machine, which includes a blade assembly 1, a distance sensor 2, a driving mechanism 3, and a control mechanism.
Referring to fig. 1, a blade assembly 1 is mounted on a frame 4 of a flaker for scraping material from the surface of a drum 5 into flakes. In one embodiment of the application, the blade assembly 1 comprises a blade carrier 11 mounted on the frame 4 of the sheeting machine via a spindle 13 and a blade 12 mounted on the blade carrier 11 for scraping the material from the surface of the drum 5 into a sheet, the blade 12 being held by the blade carrier 11 and being fed and retracted (i.e. adjusting the distance between the edge of the blade 12 and the surface of the drum 5) as the blade carrier 11 rotates about the spindle 13.
The distance sensor 2 is arranged on one side of the blade assembly 1 close to the rotary drum 5 and is used for measuring the distance between the blade assembly 1 and the surface of the rotary drum 5 after scraping materials. The distance sensor 2 of the present embodiment preferably adopts a grating scale, the grating scale adopts a mechanical contact mode to measure distance, the measurement accuracy is high, and the measured data is reliable, however, in other embodiments, the distance sensor 2 may also adopt a laser distance measuring sensor, an ultrasonic distance measuring sensor, or other devices.
In one embodiment of the application, the grating ruler comprises a base 21, a sliding block 22, a grating ruler reading head 23, a grating ruler body 24, a push rod 25 and a return spring 26, wherein the base 21 is fixed on the blade assembly 1, an inner cavity is formed in the base 21, the sliding block 22 is slidably arranged in the base 21, the grating ruler reading head 23 is fixed on the sliding block 22, the grating ruler body 24 is arranged in the base 21 along the sliding direction of the grating ruler reading head 23, the rear end of the push rod 25 is connected with the sliding block 22, the front end of the push rod 25 penetrates out of the base 21 and abuts against the surface of the rotary drum 5 after scraping materials, and the return spring 26 is supported between one side, away from the push rod 25, of the sliding block 22 and the base 21. Because the front end of push rod 25 offsets with drum 5 surface, when drum 5's radius increases, drum 5 can push rod 25 backward, and then drive slider 22 backward slip, reset spring 26 compresses, when drum 5's radius reduces, slider 22 forward slip under reset spring 26's effect, and then push rod 25 moves forward, make the front end of push rod 25 offset with drum 5 surface, grating chi reading head 23 along with slider 22 reciprocating motion, the reading of grating chi ruler body 24 is discerned through grating chi reading head 23, can measure the change of the interval between blade subassembly 1 and the drum 5 surface. The base 21 is further provided with a linear bearing 212, and the push rod 25 is fitted into the linear bearing 212, so that the stability of the push rod 25 moving back and forth can be improved.
In order to reduce friction between the push rod 25 and the drum 5 and reduce abrasion between the push rod 25 and the drum 5, a roller 27 is mounted at the front end of the push rod 25, and the front end of the push rod 25 is in rolling contact with the surface of the drum 5 through the roller 27. In addition, in the rolling contact process of the roller 27 with the surface of the rotary drum 5, the outer peripheral surface of the roller 27 may be stained with a layer of dust, so that the diameter of the roller 27 becomes larger, and the actual deviation of the measuring result of the grating ruler is caused. In order to ensure that the brush 28 can still keep contact with the surface of the roller 27 after a certain abrasion, the front end of the push rod 25 of the embodiment is axially provided with a first chute 29, a brush seat 210 and a first compression spring 211 supported between the brush seat 210 and the bottom of the first chute 29 are slidably arranged in the first chute 29, the brush 28 is planted on the front side of the brush seat 210, and when the brush 28 is abraded, the first compression spring 211 ejects the brush seat 210, so that the brush 28 is ensured to always contact with the surface of the roller 27.
The rear side of the blade assembly 1 is provided with a second chute 213 for accommodating the base 21, the bottom of the second chute 213 is provided with a through hole 214 which is communicated with the front side of the blade assembly 1 and is penetrated by a linear bearing 212, the linear bearing 212 is sleeved with a second compression spring 215 which is supported between the base 21 and the bottom of the second chute 213, and the rear end of the second chute 213 is internally connected with a plug 216 in a threaded manner. During installation, the second compression spring 215 is firstly installed in the second chute 213, the grating ruler is installed in the second chute 213, the linear bearing 212 and the push rod 25 of the grating ruler penetrate through the through hole 214, the roller 27 is installed at the front end of the push rod 25 of the grating ruler, the plug 216 is finally screwed into the rear end of the second chute 213, and the position of the roller 27 at the front end of the push rod 25 can be adjusted through the depth of screwing the plug 216 into the second chute 213.
The driving mechanism 3 is used for driving the blade assembly 1 to feed or retract to adjust the distance between the blade assembly 1 and the surface of the rotary drum 5. The driving mechanism 3 of this embodiment may be a servo cylinder, a servo hydraulic cylinder or a servo electric cylinder, wherein the servo cylinder is mounted on the frame 4 of the sheeting machine, the output shaft of the servo cylinder is hinged to the lower part of the tool rest 11, when the servo cylinder extends, the blade assembly 1 withdraws the tool, and when the servo cylinder retracts, the blade assembly 1 feeds the tool. Of course, in other embodiments, the driving mechanism 3 may also drive the blade assembly 1 to feed or retract by driving a screw with a servo motor, which is not described herein.
The control mechanism is a PLC controller, and the control mechanism controls the driving mechanism 3 to drive the blade assembly 1 to feed or retract according to the distance between the blade assembly 1 and the surface of the rotary drum 5, which is measured by the distance sensor 2, so that the distance between the blade assembly 1 and the surface of the rotary drum 5 is always kept at a set value.
The distance between the blade assembly 1 and the surface of the rotary drum 5 is measured by the distance sensor 2 and is sent to the control mechanism, and the control mechanism judges the feeding or retracting of the cutter according to the distance measured by the distance sensor 2 and controls the driving mechanism 3 to perform corresponding movement. During rotation of the drum 5, when the area of the drum 5 protruding outwards relative to the standard circle passes through the blade assembly 1, the distance between the blade assembly 1 and the surface of the drum 5 is measured by the distance sensor 2 to be smaller, at this time, the driving mechanism 3 drives the blade assembly 1 to retract until the distance between the blade assembly 1 and the surface of the drum 5 returns to a set value, when the area of the drum 5 recessed inwards relative to the standard circle passes through the blade assembly 1, the distance between the blade assembly 1 and the surface of the drum 5 is measured by the distance sensor 2 to be larger, at this time, the distance between the blade assembly 1 and the surface of the drum 5 is driven by the driving mechanism 3 to feed the blade assembly 1 until the distance between the blade assembly 1 and the surface of the drum 5 returns to the set value.
Therefore, the automatic adjusting mechanism of the blade 12 of the flaker automatically adjusts the distance between the blade 12 and the rotary drum 5 in real time in the slicing process, so that the blade 12 and the rotary drum 5 always keep the optimal slicing distance, the problems of contact and abrasion between the blade and the rotary drum 5 caused by radius deviation of the rotary drum 5 at different positions are solved, the service life of the blade 12 is prolonged, the replacement frequency of the blade 12 is reduced, and the production cost is reduced.
The application also provides a blade automatic adjusting method of the flaker, which adopts the blade automatic adjusting mechanism of the flaker and comprises the following steps:
step one: the distance sensor 2 measures the distance L1 between the blade assembly 1 and the surface of the drum 5 after scraping the materials, and feeds the distance L1 back to the control mechanism;
step two: the control mechanism compares the data L1 measured by the distance sensor 2 with a set value L of the distance between the blade assembly 1 and the surface of the rotary drum 5, if L1 is larger than L, the control mechanism outputs a signal to control the driving mechanism 3 to drive the blade assembly 1 to feed until L1=L, if L1 is smaller than L, the control mechanism outputs a signal to control the driving mechanism 3 to drive the blade assembly 1 to retract until L1=L, and if L1=L, the driving mechanism 3 maintains the distance between the blade assembly 1 and the surface of the rotary drum 5 unchanged.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and are intended to be included within the scope of the appended claims and description.
Claims (9)
1. The utility model provides a knot mascerating machine blade automatically regulated method which characterized in that adopts knot mascerating machine blade automatically regulated mechanism, this kind of knot mascerating machine blade automatically regulated mechanism includes:
the blade assembly is arranged on the frame of the flaker and is used for scraping and cutting materials on the surface of the rotary drum into flakes;
the distance sensor is arranged on one side, close to the rotary drum, of the blade assembly and is used for measuring the distance between the blade assembly and the surface of the rotary drum after scraping materials;
the driving mechanism is used for driving the blade assembly to feed or retract so as to adjust the distance between the blade assembly and the surface of the rotary drum;
the control mechanism controls the driving mechanism to drive the blade assembly to feed or retract according to the distance between the blade assembly and the surface of the rotary drum, which is measured by the distance sensor, so that the distance between the blade assembly and the surface of the rotary drum is always kept at a set value;
the method comprises the following steps:
step one: the distance sensor measures the distance L1 between the blade assembly and the surface of the drum after scraping the materials, and feeds the distance L1 back to the control mechanism;
step two: the control mechanism compares the data L1 measured by the distance sensor with a set value L of the distance between the blade assembly and the surface of the rotary drum, if L1 is larger than L, the control mechanism outputs a signal to control the driving mechanism to drive the blade assembly to feed until L1=L, if L1 is smaller than L, the control mechanism outputs a signal to control the driving mechanism to drive the blade assembly to retract until L1=L, and if L1=L, the driving mechanism maintains the distance between the blade assembly and the surface of the rotary drum unchanged.
2. The automatic adjustment method of a sheeting machine blade according to claim 1, wherein the distance sensor is embodied as a grating scale.
3. The automatic blade adjusting method of the flaker according to claim 2, wherein the grating ruler comprises a base, a sliding block, a grating ruler reading head, a grating ruler body, a push rod and a reset spring, the base is fixed on the blade assembly, an inner cavity is formed in the base, the sliding block is slidably installed in the base, the grating ruler reading head is fixed on the sliding block, the grating ruler body is arranged in the base along the sliding direction of the grating ruler reading head, the rear end of the push rod is connected with the sliding block, the front end of the push rod penetrates out of the base and abuts against the surface of the drum after scraping materials, and the reset spring is supported between one side, away from the push rod, of the sliding block and the base.
4. The automatic adjustment method of a flaker blade according to claim 3, wherein a roller is installed at the front end of the push rod, and the front end of the push rod is in rolling contact with the surface of the drum through the roller.
5. The automatic adjustment method of a sheeting machine blade of claim 4, wherein the front end of the push rod is further provided with a brush, and the brush is in contact with the outer peripheral surface of the roller.
6. The automatic adjustment method of a flaker blade according to claim 5, wherein a first sliding groove is formed in the front end of the push rod along the axial direction, a brush seat and a first compression spring supported between the brush seat and the bottom of the first sliding groove are slidably arranged in the first sliding groove, and the brush is planted on the front side of the brush seat.
7. The automatic adjustment method of a flaker blade of claim 3 wherein the base is further provided with a linear bearing and the push rod fits within the linear bearing.
8. The automatic adjustment method of the blade of the flaker according to claim 7, wherein a second chute for accommodating the base is formed on the rear side of the blade assembly, a through hole which is communicated with the front side of the blade assembly and is used for the linear bearing to pass through is formed in the bottom of the second chute, a second compression spring supported between the base and the bottom of the second chute is sleeved on the linear bearing, and a plug is connected to the rear end of the second chute in an internal thread manner.
9. The automatic adjustment method of a blade of a sheeting machine according to any one of claims 1 to 8, wherein the control structure is a PLC, the driving mechanism is a servo cylinder, the blade assembly includes a blade carrier mounted on a frame of the sheeting machine via a rotating shaft, and a blade mounted on the blade carrier for scraping material on a surface of the drum into sheets, and the servo cylinder is used for driving the blade carrier to rotate around the rotating shaft to feed or retract the blade assembly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910865495.7A CN110465243B (en) | 2019-09-12 | 2019-09-12 | Automatic blade adjusting mechanism and method for flaker |
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|---|---|---|---|
| CN201910865495.7A CN110465243B (en) | 2019-09-12 | 2019-09-12 | Automatic blade adjusting mechanism and method for flaker |
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| CN110465243A CN110465243A (en) | 2019-11-19 |
| CN110465243B true CN110465243B (en) | 2023-08-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111136037A (en) * | 2019-12-25 | 2020-05-12 | 张健 | Equipment metal surface contactless clearance control device |
| CN113552845B (en) * | 2021-07-29 | 2022-06-21 | 重庆博张机电设备有限公司 | Measurement control method and flaker |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2813087Y (en) * | 2005-08-26 | 2006-09-06 | 张健 | Machine for obtaining flakes by scraping a solid layer from a surface |
| CN110193325A (en) * | 2019-06-03 | 2019-09-03 | 重庆博张机电设备有限公司 | Cutter frame structure, blade structure, blade mechanisms and drum structure |
| CN210646277U (en) * | 2019-09-12 | 2020-06-02 | 张健 | Automatic blade adjusting mechanism of flaker |
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2019
- 2019-09-12 CN CN201910865495.7A patent/CN110465243B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2813087Y (en) * | 2005-08-26 | 2006-09-06 | 张健 | Machine for obtaining flakes by scraping a solid layer from a surface |
| CN110193325A (en) * | 2019-06-03 | 2019-09-03 | 重庆博张机电设备有限公司 | Cutter frame structure, blade structure, blade mechanisms and drum structure |
| CN210646277U (en) * | 2019-09-12 | 2020-06-02 | 张健 | Automatic blade adjusting mechanism of flaker |
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