499results about "Shearing tools" patented technology

A pipe cutting device includes a cutting element, a counter-holder, and a C-shaped working head. The counter-holder is formed by the working head and the cutting element protrudes into a C-opening. The working head merges into a foot part and the cutting element is accommodated in a displacement part. The displacement part is movably arranged with the cutting element in an offset part and / or the counter-holder has rollers, and each two rollers are mounted in pairs on a rocker part. A further pipe cutting device has an offset part and a counter-holder which are formed on a C-shaped working head. The working head merges into a foot part which can also be used as a handle area, and the offset part can be offset relative to the foot part in order to change an opening width of the working head. In addition, the offset part has a cutting element.

The invention relates to the technical field of silicon steel coil cutting devices, and particularly discloses an automatic silicon steel coil cutting treatment device for transformer machining, which comprises a working plate, a frame is fixedly mounted at the position, close to the middle, of the upper end face of the working plate, a first sliding block is slidably arranged on the inner side of the frame, and a first adjusting rod is arranged on the inner side of the first sliding block; tensioning rotating shafts in a symmetrical state are arranged on the outer sides of the first adjusting rods, the outer circumferential surfaces of the tensioning rotating shafts are covered with nanoscale elastic wear-resistant coatings, pressure sensors are embedded in the tensioning rotating shafts, the pressure sensors are electrically connected with an external controller, and the coiled material tensioning pressure can be fed back in real time and automatically adjusted; the pressure sensor is embedded in the tensioning rotating shaft, the tensioning pressure of the coiled material is fed back in real time, the servo control of the third motor and the fourth motor is combined, the dynamic adjustment of the tensioning pressure is realized, and the coiled material is effectively prevented from being wrinkled and deviated. And meanwhile, the nanoscale elastic wear-resistant coating on the surface of the tensioning rotating shaft can reduce frictional wear, and the surface of the coiled material is prevented from being scratched.

The utility model relates to the technical field of cutting knives, and discloses a cutting knife, processing equipment and a machine tool, the cutting knife is characterized in that a blade body is arranged in a cross section perpendicular to an axis, two front knife faces and two rear knife faces form a centrosymmetric quadrangle, adjacent front knife faces and rear knife faces form cutting blades, and the cutting blades are arranged in the quadrangle and on the same side of the axis; an included angle alpha is formed between the rear tool face and the machining reference face of the rear tool face, the included angle alpha is larger than or equal to 0.5 degree and smaller than or equal to 20 degrees, and the blade body is provided with two machining reference faces which are symmetrically located on the two sides of the axis of the blade body and parallel to the axis. By means of the structure, the cutter does not need to machine a roll angle in the machining process, the one-way cutting edge is tightly attached to the machining arc face, residues on the machined face are reduced, machining quality is improved, and high-precision machining is achieved.

The utility model relates to a cutting device and battery manufacturing equipment, and belongs to the technical field of battery manufacturing. The utility model provides a cutting device. The cutting device comprises a pair of cutters; the driving mechanism is configured to drive the pair of cutters to be mutually closed or opened in the first direction; the gap adjusting mechanism is configured to drive at least one of the pair of cutters to move in the second direction before the driving mechanism drives the pair of cutters to be opened, so that the movement gap between the pair of cutters is increased; wherein the first direction intersects with the second direction. The cutting device is provided with the gap adjusting mechanism, the abrasion degree of the cutting device can be reduced, and the service life of the cutting device is prolonged.

Disclosed is a threaded rod cutter, which relates to shearing equipment. The threaded rod cutter includes a shear assembly and a drive assembly; the shear assembly includes a shear base, a stationary blade, a shear lever, a moving blade, a reset spring, a cam, and a roller; the drive assembly includes an electric motor for driving the cam and a speed reducer; a lower concave surface, an involute surface, and a circular fillet surface connecting the lower concave surface and the involute surface are arranged along a peripheral direction of the cam; when the roller engages the lower concave surface, the threaded rod cutter is in a ready-to-shear state; when the roller rotates past the lower concave surface to engage the involute surface, the involute surface drives the shear lever to swing so that the shear lever drives the moving blade to be fitted with the stationary blade to shear a threaded rod. By changing the position on the cam where the ready-to-shear roller is engaged, a problem of existing threaded rod cutters which easily cause damages to the electric motor due to excessively large sudden flow of current upon energization is solved.

The utility model discloses a trimming mechanism of a high-speed slitting machine for high-precision steel belt machining. The trimming mechanism comprises a connecting column, the outer adjusting sliding disc is arranged on the outer side of the connecting column in a sliding mode; the edge trimming device has the advantages that the adjusting sliding block, the limiting clamping block and the installation clamping grooves are arranged, the adjusting sliding block is adjusted in the outer adjusting sliding disc in a limiting and sliding mode, limiting is conducted through the limiting clamping block at the top of the adjusting sliding block and the installation clamping grooves in the outer side of the connecting column, and the edge trimming cutter is arranged on the outer side of the outer adjusting sliding disc. The positions, on the outer side of the connecting column, of the outer adjusting sliding disc and the trimming cutters are limited and fixed, the multiple mounting clamping grooves formed at equal intervals meet the requirement for the proper distance between the trimming cutters, the mounting clamping grooves are formed according to the width of a steel belt needing to be trimmed, and the trimming cutters can be trimmed through limiting and fixing between the adjusting sliding blocks and the mounting clamping grooves; and the outer adjusting sliding disc and the trimming cutter are adjusted, and the steel belt machining requirement is met.

The utility model discloses a cutting device for building structure engineering construction, which relates to the technical field of building engineering cutting devices and comprises a mounting frame, a positioning component, a transverse adjusting component, a vertical adjusting component and a cutting component. Supporting frames are arranged on the two sides of the top end of the mounting frame respectively, the two ends of the transverse adjusting assembly are arranged on the supporting frames respectively, the vertical adjusting assembly is arranged on the transverse adjusting assembly, a moving plate is arranged on the transverse adjusting assembly, and the cutting assembly is arranged on the moving plate. Through the design of the positioning assembly, the transverse adjusting assembly and the vertical adjusting assembly, accurate positioning and adjusting of equipment in the cutting process can be guaranteed, the cutting precision and stability are improved, and errors are reduced. And due to application of the electric push rod and the driving motor, adjustment of the cutting device is more automatic, the complexity of manual operation is reduced, and the working efficiency is improved.

The utility model provides a novel steel plate shearing machine which comprises a machine body and a shearing unit. The shearing unit comprises a cutter movably arranged on the machine body and a driving piece arranged on the machine body and used for driving the cutter to move up and down in a reciprocating mode. The limiting unit comprises a fixed seat fixedly arranged on one side of the machine body and a movable seat which is arranged on the machine body through an adjusting device and is far away from one end side of the fixed seat, at least two groups of limiting wheels are rotationally arranged on each of the fixed seat and the movable seat, and the movable seat is driven by the adjusting device to be far away from or close to the fixed seat on the machine body; the multiple sets of limiting wheels abut against the two side edges of the to-be-sheared steel plate correspondingly. Under the arrangement of the limiting unit, multiple sets of limiting wheels are arranged on the two sides of the machine body to limit a steel plate fed into a cutter, the multiple sets of limiting wheels abut against the two sides of the steel plate correspondingly, the limiting wheels rotate during feeding, the situation that the steel plate abutting against the limiting wheels is blocked and consequently influences are caused is avoided, and meanwhile the situation that the steel plate inclines in the moving process is avoided; and the sheared end of the steel plate is smooth.

A drum cutting device (100), e.g., for shears adapted to cut flat metal products (300) advancing along a direction substantially parallel to their direction of longitudinal extension, said device (100) being adapted to cut said flat metal products (200) transversely relative to their direction of advancement, wherein said device (100) comprises at least one drum (101) adapted to be rotated and diametrically delimited by a cylindrical surface (102) containing a blade or knife (103) which partially protrudes from said cylindrical surface (102), wherein said blade or knife (103) is partially housed in a seat (104) of said drum (101) and extends longitudinally along a direction substantially parallel to the rotation axis (X) of said drum (101), wherein said device (100) comprises an adjustment wedge (105) for adjusting the position of the knife, said device (100) comprising translation means for the translation of said wedge (105) in said two opposite directions of translation.

The utility model discloses plate cutting equipment for hardware machining, which belongs to the technical field of plates and comprises a workbench, a frame is fixedly mounted at the top of the workbench, an air cylinder is fixedly mounted at the top of the frame, and the output end of the air cylinder extends into the frame and is fixedly provided with a limiting seat. A gear is rotationally connected to an inner cavity of the limiting seat, meshed toothed plates are arranged on the left side and the right side of the gear correspondingly, pressing blocks are fixedly mounted on the left side of the bottom of the toothed plate on the left side and the right side of the bottom of the toothed plate on the right side correspondingly, a bottom plate is arranged at the bottom of the workbench, and supporting plates are fixedly mounted on the two sides of the front side of the top of the bottom plate correspondingly; and a first motor is fixedly mounted on the front side of the supporting plate on the front side. According to the plate cutting device, plates with different thicknesses can be limited, the use diversity of the device is improved, the cutter can be replaced, and the cutting efficiency of the plates is improved.

In a running cutting machine equipped with a set of drums, each having a helical blade, the objective is to suppress cutting defects at the start of cutting. [Solution] The running cutting machine (1) has a pair of drums (11, 31) that are arranged opposite each other and can rotate around their respective rotation axes (C1, C2), The system comprises at least one pair of helical blades (21, 41) provided on the outer circumference of each of a pair of drums (11, 31), each having an elliptical arc-shaped cutting edge. At least in the axial direction of each rotation axis (C1, C2), With respect to a reference plane (L1) passing through the respective rotation axes (C1, C2) of a pair of drums (11, 31), the cutting surfaces of a pair of helical blades (21, 41) are offset towards the entry side of the object to be cut, and the cutting surfaces of one and the other are configured to be parallel.

The invention relates to the technical field of metal processing machinery, in particular to a numerical control gantry cut-off machine capable of changing the cutting angle, which comprises a main oil cylinder and an auxiliary oil cylinder which are mounted in the middle of a rack, and a tandem oil way is arranged between the main oil cylinder and the auxiliary oil cylinder; an upper tool rest is installed in the middle of the rack, two sets of connecting bases are fixedly installed at the upper end of the upper tool rest, and ball heads matched with the connecting bases are installed at the output ends of the main oil cylinder and the auxiliary oil cylinder; a main oil cylinder upper cavity and a main oil cylinder lower cavity are formed in the main oil cylinder, and an auxiliary oil cylinder upper cavity and an auxiliary oil cylinder lower cavity are formed in the auxiliary oil cylinder. According to the numerical control gantry cut-off machine capable of changing the shearing angle, the problems that when the shearing angle of an existing cut-off machine is fixed in the using process, when a shearing material is subjected to unbalance loading, a tool rest can be clamped by a guide rail, and when a thin material is sheared, the angle cannot be adjusted, so that the shearing stroke is lengthened, the shearing speed cannot be increased, and the shearing efficiency is reduced can be solved.

The invention discloses a spinning forming device for a battery pole column, and relates to the technical field of spinning forming. The problem of process integration is solved. The device specifically comprises a conveying part used for conveying metal bars and a spinning part used for integrally cutting and spinning the metal bars, a high-frequency heating part used for heating the bars is arranged at a feeding port of the spinning part, and the spinning part is composed of two symmetrically-arranged supporting frames and three spinning rollers arranged in a triangular shape. The three spinning rollers are slidably connected to the inner wall of the supporting frame in the radial direction, and a cutter is arranged on the outer wall, located on the metal bar feeding side, of one spinning roller. By arranging the conveying part, the high-frequency heating part and the spinning part, conveying, heating, cutting and spinning of a metal bar are integrated, transfer is not needed, the whole machining efficiency is improved, meanwhile, due to the fact that the heating procedure is adjacent to the cutting and spinning procedure, heat loss can be avoided, and a certain energy-saving effect is achieved.

The utility model discloses a quick cutter replacing structure for a silicon steel sheet slitting line, and particularly relates to the technical field of slitting machines, which comprises a cutter roller, a fixed cutter rest is fixedly mounted in the cutter roller, a driving cutter rest is slidably connected to one end, far away from the fixed cutter rest, in the cutter roller, and the cutter roller drives the driving cutter rest to slide through a driving mechanism. A plurality of driven knife rests are slidably connected into the cutter roller, the fixed knife rest, the driving knife rests and the driven knife rests are connected through connecting mechanisms, arc-shaped seats are fixedly installed at the two ends of each driven knife rest, the two ends of each fixed knife rest and the two ends of each driving knife rest, and an arc-shaped cutter is installed in each arc-shaped seat. When the silicon steel sheet cutting device is used, operation is easy, rapid replacement of the arc-shaped cutters can be achieved, meanwhile, the distance between multiple sets of cutters can be adjusted, and the machining requirements of silicon steel sheets of different specifications can be met.

This invention provides a precision positioning mechanism for CNC rotary cutting equipment, including a base, a support platform, a support rod, a main frame, a rotary cutting blade, and a worktable. Support platforms are fixed to the left and right sides of the rear end of the upper surface of the base, and a support rod is horizontally fixed between the two support platforms. The main frame is nested outside the support rod, and the rotary cutting blade is rotatably connected to the front end of the main frame. An outer frame is fixed to the front end of the main frame. The worktable is fixed to the front end of the upper surface of the base, and a connecting column is vertically fixed below the front end of the outer frame. A limiting column is nested below the outer side of the connecting column, and a bottom column is fixed to the bottom end of the limiting column. Fixing frames are fixed to the left and right ends of the upper surface of the worktable, and a positioning component is fixed to the front end of the upper surface of the worktable. This invention can precisely position and cut workpieces, and the position of the workpiece positioning and cutting can be adjusted, offering high flexibility, good processing effect on workpieces, and greater ease of use.

The application belongs to the technical field of mechanical equipment, and particularly relates to a driving device and a control method of a sliding cutter holder of a bar cutting machine, wherein the driving device comprises a machine head holder, a cutter holder oil cylinder, a reset oil cylinder and a sliding cutter holder sliding on the machine head holder, the cutter holder oil cylinder and the reset oil cylinder are arranged on the machine head holder, the cutter holder oil cylinder and the reset oil cylinder are single-acting oil cylinders, the cutter holder oil cylinder and the reset oil cylinder directly or indirectly act on the sliding cutter holder to realize the reciprocating movement of the sliding cutter holder, the cutter holder oil cylinder and the reset oil cylinder of the application are single-acting oil cylinders, only the advance is considered, that is, when the telescopic rod of the cutter holder oil cylinder is extended to drive the sliding cutter holder to move, the telescopic rod of the reset oil cylinder is also retracted, vice versa, that is, when the telescopic rod of the reset oil cylinder is extended to drive the sliding cutter holder to move, the telescopic rod of the cutter holder oil cylinder is also retracted, the oil consumption in single action is reduced, the action speed of the oil cylinder is fast, the shearing times are increased, the cost is effectively reduced, and the work efficiency is improved.

The application provides a trimming shear control method, device, medium and equipment. The method comprises the following steps: determining the trimming amount of the current strip steel according to the actual width of the current strip steel and the actual width of the previous strip steel; obtaining the shape of the weld side edge of the current strip steel and the previous strip steel; judging whether the current strip steel meets the preset trimming shear online adjustment strategy based on the shape of the weld side edge, the trimming amount of the current strip steel and the actual thickness of the current strip steel; if yes, determining the feed amount of the trimming shear to be adjusted when the trimming shear online adjustment strategy is triggered. In this way, for each current strip steel, if it is determined that the preset trimming shear online adjustment strategy is met, the feed amount of the trimming shear can be directly adjusted without stopping the machine, the production rhythm is not affected, and the production efficiency is improved.

The subdivision shear box device comprises an upper shear box, a lower shear box is correspondingly arranged below the upper shear box, and the upper shear box is matched with the lower shear box in structure so as to shear a wide steel belt; the upper scissor box comprises an adjusting gasket set. The invention further discloses a shear blade mounting and adjusting method of the subdivision shear box based on base plate compensation. According to the subdivision shear box device based on base plate compensation and the method thereof, the problem that when an unworn new cutter is installed on a shear blade of an original structure, the shear blade gap and the shear face parallelism are difficult to adjust is solved.

The application provides a processing device for photovoltaic maintenance trestle, which comprises a rack, a conveying mechanism, a cutting mechanism and a stamping mechanism; the conveying mechanism is arranged on the rack and conveys the workpiece to be processed from the feeding port of the rack to the discharging port; the stamping mechanism comprises a hydraulic part and a stamping assembly arranged at the output end of the hydraulic part, and the stamping assembly is provided with a first rack; the cutting mechanism comprises a lifting assembly and a cutting assembly connected with the lifting assembly, and the lifting assembly is provided with a first gear on the side close to the first rack; when the stamping assembly moves away from the conveying mechanism after completing stamping, the cutting assembly is driven to move towards the workpiece to be processed for cutting through the meshing connection of the first gear and the first rack. The application can solve the technical problems of low work efficiency and long cycle in the prior art that stamping and cutting are completed by conveying to various processing devices.

A method of swarflessly cutting a pipe comprises the steps of forming a notch (10, fig. 6) in an external surface of a front portion of a wall of the pipe and inserting a pointed blade 51, point first

The utility model discloses a steel plate slitting machine with a cutter convenient to replace, which belongs to the technical field of shearing equipment and comprises a working table, a deviation rectifying mechanism, a driving mechanism, a mounting mechanism and a cutting roller, the inner wall of the top of the working table is fixedly connected with the deviation rectifying mechanism used for preventing a steel plate from deviating in the feeding process, and the driving mechanism is fixedly connected with the mounting mechanism. Driving mechanisms used for providing power for the slitting machine are fixedly connected to the two sides of the workbench, mounting mechanisms are arranged at the close ends of the driving mechanisms, and the two ends of the cutting roller are fixedly connected between the two mounting mechanisms. Through the mode, the cutter is conveniently and rapidly replaced, the equipment maintenance and operation efficiency is improved, the downtime is shortened, the overall production efficiency and flexibility are improved, meanwhile, the replacement process is simplified, the operation difficulty and technical requirements are reduced, and the availability and maintenance convenience of equipment are enhanced.

This invention relates to the field of corner cutting technology, specifically to a drive device for a multi-axis synchronous machining center for corner cutting of ultra-high voltage equipment. The device includes a rotary drive assembly, a connecting assembly, and a hydraulic locking assembly. The rotary drive assembly is connected to a mounting frame, and the connecting assembly is connected between the rotary drive assembly and the shear head. The hydraulic locking assembly is mounted on the mounting frame. The shear head rotation angle can be more precisely adjusted via a worm gear. After adjustment to the desired angle, the worm gear's characteristics enable self-locking. During the punching and shearing process, the friction push plate at the lower end of the hydraulic push rod and the locking plate at the upper end of the shear head will press together, and the locking effect gradually improves as the punching and shearing force increases, ensuring that the shear head does not deflect during punching and shearing, thus improving corner cutting accuracy. This invention solves the problem that when cutting high-strength angle steel, the shear head rotation axis deflects under the punching and shearing force, and the servo motor and reducer cannot provide sufficient rigidity to prevent deflection, leading to a decrease in corner cutting accuracy.

To provide a cable cutting device that can cut three-phase cables pulled out of a manhole all at once, significantly shortening a time required for removal work and improving work efficiency.SOLUTION: A cable cutting device according to the present invention is configured as a cable cutting device (cutting device 500) for cutting a three-phase cable 100 pulled out from a manhole 30, and includes a pair of opposing blades 510 (upper blade 512, lower blade 514), a frame 520 for holding the pair of blades 510, and drive units 532, 534 for moving the pair of blades 510 in a direction toward and away from each other. The pair of blades 510 are V-shaped, U-shaped, or arc-shaped with a recessed center, and cut the three-phase cable 100 all at once.SELECTED DRAWING: Figure 3

The skin nicking tool comprises a tool handle and a blade connected to one end of the tool handle, a first rolling wheel is arranged on the side, away from a cutting edge of the blade, of the tool handle, the first rolling wheel is pressed on the surface of a skin, and a first wheel frame with one end fixedly connected with the tool handle is arranged on the tool handle. And the other end of the first wheel carrier is rotationally connected with the first roller. During engraving, an operator holds the knife handle with a hand to engrave the skin in the direction from left to right. When the blade rotates around the center of the first roller, the carving depth is adjusted. If the force is suddenly increased during engraving, the skin is engraved through, and the skin is continuously engraved by keeping the state. Due to the fact that the first rolling wheel plays a supporting role in the carving process, the carving depth is easier to control compared with the carving depth control only depending on the wrist of an operator.

The utility model discloses an adjustable automobile chassis upper control arm trimming tool which comprises a working table, the upper end of the working table is fixedly connected with a supporting frame, a rotating disc is arranged in the supporting frame, the lower end of the rotating disc is rotationally connected to the upper end of the working table, and the lower end of the working table is provided with a driving assembly for driving the rotating disc to rotate. A rotating disc is arranged on the supporting frame, a chassis part is placed at the upper end of the rotating disc, two clamping assemblies used for clamping the chassis part are arranged at the upper end of the rotating disc, the two clamping assemblies are located on the left side and the right side of the chassis part respectively, a rectangular groove is formed in the inner top of the supporting frame, and an edge cutting assembly is installed in the rectangular groove. According to the four-edge cutting device, automatic adaptive cutting of chassis with different widths and one-time accurate edge cutting of four edges are achieved, and the machining efficiency and the operation convenience are remarkably improved.

The utility model provides a high-strength film blade with a replaceable tool bit, and belongs to the field of blades. The utility model relates to a film blade, in particular to a film blade which solves the problems that an existing film blade easily generates a large amount of heat during cutting, a blade head on the film blade and a blade body may deform or break under the conditions of high temperature and high pressure, a traditional blade is integrated, the whole blade needs to be replaced after being damaged, and materials are wasted. The center of the blade main body is provided with a penetrating type mounting hole, the blade main body comprises an upper blade layer, a middle blade layer and a lower blade layer which are overlapped with one another, a mounting part capable of extending to the bottom of a fixing groove from a positioning groove is arranged below the tool bit, and a mounting column is also arranged below the mounting part.

The utility model relates to the technical field of copper plate shearing, and discloses a copper plate flying shear which comprises a working table, a U-shaped frame is connected to the outer side of the working table in a sliding mode, and a first hydraulic rod is fixedly connected between the bottom face of the working table and the inner top face of the U-shaped frame. According to the copper plate flying shear, the U-shaped frame, the first hydraulic rod, the servo motor, the speed reducer, the first gear, the second gear, the rotating frame, the upper crank shaft, the lower crank shaft and the rotating shaft are arranged, the servo motor and the speed reducer drive the first gear to rotate, and the first gear drives the rotating frame to rotate through the second gear; a first hydraulic rod is started, the first hydraulic rod drives a U-shaped frame to move up and down, so that the rotating circle center of the rotating frame moves up and down, the gap between the upper blade and the lower blade is adjusted, and the copper plate is cut through the upper blade and the lower blade; and copper plates with different thicknesses can be sheared conveniently, and the shearing quality is guaranteed.

The utility model discloses a PCM color-coated steel plate integrated slitting device, and relates to the technical field of color-coated steel plate processing equipment, the PCM color-coated steel plate integrated slitting device comprises a processing table, a through groove is formed in the processing table, a mounting box is fixedly mounted at the bottom of the processing table and located below the through groove, a motor is fixedly mounted on one side of the mounting box, and the motor is fixedly connected with the through groove. The output end of the motor extends into the mounting box and is fixedly provided with a mounting shaft, the outer side of the mounting shaft is provided with a plurality of cutting discs, the bottom of the mounting box is fixedly provided with a water tank, the top of the water tank is fixedly provided with a water pump, one side of the mounting box is internally provided with a spraying plate, and the output end of the water pump is fixedly provided with a connecting pipe; the steel plate cutting device has the beneficial effects that through the arrangement of the mounting box, the water tank, the water pump, the spraying plate, the connecting pipe, the collecting box and the filter screen, the cutting disc can be cooled in the steel plate cutting process, the situation that the overall temperature of the cutting disc rises and influences the cutting efficiency is avoided, and the cutting disc can be prevented from being damaged.

A flying shear blade lock convenient to replace, comprising: clamping pieces, support frames, guide sets and blades, the clamping pieces are provided with two, the blades are between the two clamping pieces, the guide sets are provided with at least two and are respectively on the outward side of each clamping piece, each guide set is embedded in the corresponding clamping piece, and the outward side of each clamping piece is provided with a support frame; when the lowermost blade is damaged, the guide sets are moved outward in a direction until the damaged blade is moved outward to leave the assembly area of the next blade, at this time, the support frames provided on the two clamping pieces simultaneously drive the rotating rods to move in a direction, during which the two moving rods provide clamping functions, so that the next blade moves to the assembly area below, when placed in the assembly area, the two guide sets are on the top of the blade and realize clamping, so that the next blade replaces the damaged blade to work.