688 results about "Circular saw" patented technology

The invention relates to the technical field of electric tools, in particular to a high-stability electric circular saw base which comprises a main machine shell, a lateral protective cover is movably assembled on the side wall of the main machine shell, an electric control type cutting circular saw is installed on the side wall of the main machine shell and located in the lateral protective cover, and a lateral stability adjusting base is arranged on one side of the main machine shell. And a side hanging type dust collecting box is mounted on the side wall of the lateral stable adjusting seat. According to the high-stability machine base for the electric circular saw, the lateral stability adjusting base is arranged on one side of the main machine shell, the position of the whole electric circular saw is limited through the lateral stability adjusting base, and therefore the stability of the electric circular saw in the mounting and cutting process is improved, and operation is convenient; the embedded overhead guide rail with the built-in electric control lead screw is fixedly assembled on the upper surface of the lateral stability adjusting seat, the electric control lead screw is directly connected with the main machine shell and is controlled, and storage and unfolding are convenient.

The invention relates to the field of metal water pipe machining equipment, and discloses automatic production and machining equipment for bathroom metal water pipes, which comprises a machining table, a back plate is fixedly mounted on the rear side of the top end of the machining table, a movable table is movably mounted on one side of the front end of the back plate through a guide rail, and an upper sliding table is movably mounted on the upper side of the front end of the movable table; the four corners of the bottom end of the upper sliding table are connected to the four corners of the top end of the lower sliding table through reset springs, a cutting shaft is movably installed at one end of the lower sliding table, a cutting circular saw is fixedly installed at the outer side end of the cutting shaft, and a transmission shaft is movably installed in the middle of the interior of the lower sliding table. Through innovative designs such as multi-shaft transmission, dynamic synchronization, vibration cutting and magnetic polishing, automation, high precision and high efficiency of bathroom metal water pipe production are achieved, the finished product quality and the production efficiency are remarkably improved, meanwhile, the labor cost and energy consumption are reduced, and the production line is suitable for large-scale bathroom pipe machining scenes.

The invention discloses a double-arm citrus picking robot and a picking method, and belongs to the technical field of agricultural automation equipment. The robot comprises a crawler-type moving chassis, a symmetrically-arranged double-mechanical-arm system, a machine vision system, a citrus collecting bin and a control system. The double-mechanical-arm system adopts a main and auxiliary collaborative framework, the tail end of a main mechanical arm is integrated with a clamping jaw and vacuum suction disc parallel mechanism, an auxiliary mechanical arm is provided with a rotary circular saw blade, and lossless clamping of fruits and precise cutting of fruit stems are achieved. The machine vision system realizes high-precision citrus identification under complex illumination by improving a YOLOv5 network and fusing an HSV dynamic threshold value and Focal Loss optimization; graded path planning is combined with an A * algorithm and an RRT * algorithm, and motion safety of the mechanical arm is ensured through bounding box collision detection. The picking method comprises the steps of three-dimensional semantic map construction, collaborative grabbing and cutting, lossless transfer and the like. The problems that a single-arm robot is low in efficiency, fruits are prone to being damaged, fruit stems are not thoroughly treated and the like are solved, and the robot is suitable for automatic orchard harvesting in hilly areas.

The utility model discloses saw blade base body heat treatment equipment which comprises a furnace body, a furnace chamber is arranged in the furnace body, a movable door is arranged on the side wall of the furnace body, a plurality of electric radiant tubes are symmetrically arranged on the inner wall of the furnace chamber corresponding to the two sides of the movable door respectively, and the saw blade base body heat treatment equipment comprises a base arranged at the bottom of the furnace body and matched with the bottom of the furnace body in a sliding mode. A supporting seat for placing batch circular saw blades is arranged at the bottom of the furnace chamber, a first annular tooth group is arranged on the outer wall of the furnace body, a driving motor connected with the base is arranged on the adjacent side of the furnace body, a first transmission gear meshed with the first annular tooth group is arranged on an output shaft of the driving motor, and the supporting seat is rotationally connected with the base; and the supporting seat can rotate in different directions relative to the furnace body. The saw blade heat treatment device has the advantages of being capable of conducting uniform and stable heat treatment on the saw blade, guaranteeing a better heat treatment effect on the saw blade and the like.

The invention relates to the field of metal cutting, and particularly discloses a horizontal pushing type feeding full-automatic numerical control circular sawing machine which comprises a machining table, a conveying plate for automatically conveying materials is arranged on the machining table, a clamping assembly is arranged on the machining table, a pushing assembly is arranged on the machining table, and a sawing assembly is arranged on the pushing assembly. A sliding assembly is arranged on the machining table. In the sawing process of materials, the advancing and retreating effects of the device are ingeniously utilized, so that the device forms a multi-form mode, the material receiving and discharging functions are achieved, effective transition of the materials from equipment to a collecting area is achieved, gravitational potential energy of the materials is converted, the materials are smoothly discharged, and free falling of the materials is avoided; materials are prevented from being impacted and damaged, the quality of the materials is improved, the yield of the materials is increased, the automatic discharging effect of the device is achieved, the full-automatic effect of the device is improved, the intellectualization of the device is improved, and the market competitiveness of enterprises is facilitated.

The invention discloses a wire harness assembly cutting device, and relates to the technical field of cutting devices.The wire harness assembly cutting device comprises an outer frame, a lifting device is arranged at the top of the outer frame, a circular saw cutting machine is arranged at the moving end of the lifting device, a wire drawing device is arranged on the outer frame, and the wire drawing device comprises a fixing plate, a wire drawing device body and a wire drawing device body; the fixing plate is fixedly mounted on the surface of the outer frame, and a sliding rail is arranged on the surface of the fixing plate; the linear driving device is arranged on the inner wall of the fixing plate; the sliding platform is in threaded connection with the output end of the linear driving device, and the bottom of the sliding platform is in sliding connection with the sliding rail; the clamping blocks and the conveying rollers are matched to pull the wire harness, different cutting requirements can be met, the wire harness can be prevented from deviating due to tangential force of the circular saw cutting machine in the cutting process, and it is guaranteed that follow-up cutting is conducted smoothly.

A slab processing machine includes a work table, a machining head, and at least one drive mechanism. The machining head mounts a circular saw blade for respective cutting of a stone or stone-like slab positioned on the work table with a finished face of the slab down on vacuum pods. A controller operates the machining head to rotate the machining head on the A-axis and bevel cut the slab while positioned upside down with the finished face down on the vacuum pods.

The invention discloses a cutting device for composite keel forming production, and belongs to the technical field of composite keel production. Comprising a rack, a conveying mechanism is installed on the upper surface of the rack, a dust cover is arranged above the inner wall of the rack, a second motor is connected to the front face of the dust cover through bolts, a rotating rod is fixedly connected to the output end of the second motor, and a circular saw blade is fixedly arranged on the outer side of the rotating rod in a sleeving mode; and the circular saw blade is rotationally connected to the interior of the dustproof cover through a rotating rod. According to the cutting device for composite keel forming production, cutting resistance can be adjusted in a self-adaptive mode, the cooling and dust removing range can be dynamically adapted, keels of multiple specifications are compatible, a circular saw blade moves to be synchronously linked with a spray head during cutting, swing of the spray head within the range of size is achieved through meshing switching of intermittent double racks and gears, chatter of the saw blade is restrained through cooperation with a friction ring, and notch defects are reduced; and the cylinder drives the component to translate to ensure that each mechanism adapts to the keels of multiple specifications, so that the cutting precision and efficiency are improved.

The invention discloses an efficient cutting device for stainless steel pipes, and belongs to the technical field of cutting equipment, the efficient cutting device comprises a bottom plate, a feeding assembly, a fixing assembly and a straightening assembly are arranged on the bottom plate, the straightening assembly can automatically straighten the pipes, it is ensured that the pipes are kept in a linear state before cutting, and therefore the cutting quality and the yield are improved. The fixing assembly can achieve rapid clamping and center positioning of a pipe, the straightening assembly provides auxiliary supporting in the cutting process, the limiting unit can effectively lock the angle and the position of a straightening cylinder, the straightening cylinder is prevented from accidentally deviating in the straightening or cutting process, it is guaranteed that the pipe is always kept precisely centered in the fixing and straightening process, and the pipe straightening efficiency is improved. Through mutual cooperation of the feeding assembly, the fixing assembly and the straightening assembly, the stainless steel pipe can be rapidly and accurately positioned and fixed, through cooperation with efficient cutting of the circular saw blade, the cutting efficiency and precision are remarkably improved, and the machining requirements of pipes of different sizes are met.

The invention provides double-cutter cooperative tracking type precise cutting equipment, and relates to the field of cutting equipment.The double-cutter cooperative tracking type precise cutting equipment comprises a double-cutter assembly, the double-cutter assembly is composed of an upper cutter mechanism and a lower cutter mechanism, and through the design of the double-cutter structure, it can be guaranteed that the lengths of groove bodies for cutting and grooving in the bottom and the top of a workpiece are consistent during grooving machining; double-face grooving machining of a workpiece can be completed through one-time operation, in the grooving mode, the upper cutter mechanism can automatically track the height of the workpiece and automatically adjust and control the cutting position and depth, the operation process is simplified, the working efficiency is improved, the workpiece can be rapidly cut off in the cutting-off mode, and the work efficiency is improved. The problems that an existing saw blade cut-off machine is only provided with one circular saw blade rotating around a shaft, the lengths of groove bodies at the bottom and the top of a workpiece are not consistent during cutting, and the length of the groove body at the bottom is shorter than that of the groove body at the top are solved.

A circular saw blade has a substantially circular core zone which is surrounded by an edge zone adjoining the core zone radially outwards in the region of a boundary line in order to form a basic body. The edge zone has a plurality of teeth, each with a tooth face, and each tooth face is assigned a carbide tip. A tooth space is in each case formed between two teeth directly adjacent circumferentially, and a friction-reducing sliding coating and a wear-reducing hard coating are provided which are formed lying one above the other at least in certain regions.

The application discloses a processing method of corrugated paper packaging boxes, and adopts corrugated paper packaging box processing equipment to process the corrugated paper packaging boxes, wherein the corrugated paper packaging box processing equipment comprises a circular saw and a clamp; the circular saw is arranged in an adjustable position mode, the clamp can be moved in position relative to the circular saw; and the clamp can stack and fix a plurality of corrugated paper packaging boxes. The corrugated paper packaging box processing equipment is used to process the corrugated paper packaging boxes, the cutting operation on the plurality of corrugated paper packaging boxes can be completed at one time by means of the circular saw, and therefore the processing efficiency of the corrugated paper packaging boxes is greatly improved.

The invention discloses an agricultural machine blade protector cutting machine tool, and belongs to the technical field of sawing machines. Comprising a base frame provided with a workbench. The plurality of blade protector clamps are transversely arranged and fixed on the workbench; the lifting frame is installed on the base frame in a lifting mode through the lifting assembly and located above the workbench. The cutting head is transversely installed on the lifting frame in a sliding mode through a transverse sliding assembly. Wherein a circular saw blade is installed on the cutting head, a cutter guiding groove allowing the circular saw blade to transversely penetrate through is formed in the edge protector clamp, a sliding groove of an edge protector on the edge protector clamp is vertically upward, and the sliding groove and the cutter guiding groove are located in the same vertical plane. The multiple transversely-arranged edge protector clamps are arranged on the workbench, saw cutting of edge protector sliding grooves in all the clamps can be sequentially completed through single-time horizontal movement of the cutting head, and synchronous saw cutting of multiple workpieces is achieved; the clamp can complete automatic positioning and discharging, the auxiliary working time is shortened, and the machining efficiency is improved.

The utility model discloses a single blade saw cutting system, and relates to the technical field of MFB ore rock floor cutting. The device comprises a base frame, a limiting assembly is arranged in the base frame, the limiting assembly comprises translation hydraulic rods connected to the outer side walls of limiting plates, the two limiting plates are symmetrically arranged in the base frame, and translation hydraulic cylinders connected to the outer ends of the translation hydraulic rods are connected to the upper surface of the base frame; and a cutting assembly is arranged above the base frame and comprises a placement frame connected to the lower surface of the top plate, the placement frame is arranged above the base frame, a rotating motor is connected to the outer side wall of the placement frame, and a lead screw connected to the end face of the rotating motor is rotationally connected to the interior of the placement frame. According to the MFB ore rock floor limiting device, the limiting assembly is arranged, the MFB ore rock floor limiting device is suitable for limiting MFB ore rock floors of different sizes, the operation steps of MFB ore rock floor limiting are simplified, and the cutting assembly is arranged, so that the situation that hands are accidentally injured when a circular saw blade works is effectively avoided.

This invention relates to the field of circular saw technology and discloses a circular saw. The top of the base plate is connected to a power mechanism via a hinge mechanism. The output end of the power mechanism is connected to a saw blade. A negative pressure dust collection assembly, rotating synchronously with the saw blade, is mounted on the output shaft of the power mechanism. A protective cover is installed above the saw blade. A segmented dust collection hood assembly corresponding to the saw blade's cutting area is connected to the negative pressure dust collection assembly. This invention overcomes the bottlenecks of existing technologies from two core dimensions: power utilization and dynamic dust collection structure. It achieves efficient dust collection across the entire cutting depth range without adding extra power, while also possessing the advantages of simple structure, low cost, and high reliability. It exhibits outstanding substantive features and significant progress.

This utility model discloses a control device for a circular saw for cutting pipe fittings. It includes a device body with a rear sliding groove at the rear. A movable plate is slidably connected to the rear sliding groove, and a positioning device is fixedly connected to the movable plate. A drive motor is fixedly connected to the right end of the positioning device, and a threaded rod is fixedly connected to the output end of the drive motor via a coupling. A positioning clamping block is fitted onto the threaded rod. A hole is opened at the left end of the positioning clamping block, and a sliding rod is slidably connected within the hole. A measuring laser is fixedly connected to the left side of the middle section of the device body. This device uses a laser to mark and position the pipe fitting cutting area, ensuring cutting accuracy and ease of operation. The laser device uses a precise beam to indicate the cutting position, avoiding errors from manual visual inspection and improving cutting accuracy.

The utility model discloses a circular saw beveling angle adjusting mechanism, and particularly relates to the technical field of angle adjustment, the circular saw beveling angle adjusting mechanism mainly comprises a concave sleeve plate, a rotating shaft and an angle rotating block, the rotating shaft is rotatably connected in the concave sleeve plate, the angle rotating block is fixed at one end part of the rotating shaft, and an extension angle adjusting mechanism is arranged on the upper surface of the angle rotating block; the extension angle adjusting mechanism comprises a sleeve plate fixedly arranged on the upper surface of the angle rotating block, one side of the inner wall of the sleeve plate is fixedly connected with a sleeving block, the inner wall of the sleeving block is slidably connected with a supporting rod, and the supporting rod is fixedly connected with the angle rotating block. The extension angle adjusting mechanism is adopted, a rotating motor drives a rotating shaft to rotate, meanwhile, the rotating shaft drives an angle rotating block to enable a supporting rod to rotate, an electric cylinder is started to push a sleeve plate to move upwards, the sleeve plate drives a sleeving block to move upwards, the sleeve plate can drive a sliding rod to enable an arc-shaped groove plate to slide upwards in a guiding mode, and the circular saw can be subjected to extension adjustment at different angles and different positions; and the adjustment is more convenient.

The utility model relates to the technical field of electric tools, in particular to a circular saw capable of adjusting cutting angle and depth, which comprises a base and a saw blade component, and a rectangular operation hole is arranged on the base; a cutting depth adjusting mechanism and a cutting angle adjusting mechanism are arranged on the base, and the two sides of the saw blade assembly are installed on the cutting depth adjusting mechanism and the cutting angle adjusting mechanism respectively. A first magnet is installed at the adjusting end of the cutting depth adjusting mechanism, and a first magnetic encoder matched with the first magnet is installed on the base. A second magnet is installed at the adjusting end of the cutting angle adjusting mechanism, and a second magnetic encoder matched with the second magnet is installed on the base. The cutting depth adjusting mechanism and the cutting angle adjusting mechanism can rapidly and conveniently adjust the cutting depth and the cutting angle of the saw blade assembly, the two sets of magnetic encoders are matched with the magnets, the adjusting changes of the cutting depth and the cutting angle can be accurately detected, the adjusting precision is high, and the adjusting effect is good.

A circular saw may include a base plate and a blade guard assembly coupled to the base plate, the blade guard assembly including an upper blade guard and a lower blade guard movable between an extended position and a retracted position. A circular saw may include a housing assembly coupled to a saw blade guard assembly, an output shaft, and a saw blade clamp coupled to the output shaft, the saw blade clamp configured to hold a saw blade. The circular saw may include a brushless direct current (DC) motor positioned within the housing assembly and operable to rotate the output shaft. The circular saw may include an electronic controller configured to perform a field weakening operation on the brushless DC motor.

This invention relates to a novel P-approach endoscopic lumbar fusion surgery method, belonging to the field of lumbar fusion surgery technology. This method addresses the high risk of nerve injury and insufficient operational precision in existing endoscopic fusion techniques by proposing an improved solution. It utilizes Kirschner wires for positioning at the inferior articular process to establish a precise entry point avoiding the nerve root pathway; a visually guided circular saw is used throughout the endoscopic procedure to construct a safe triangular working channel directly reaching the spinal canal; under full endoscopic monitoring, a unilateral approach is used for bilateral spinal canal decompression, thoroughly removing diseased tissue and scraping the endplates until punctate bleeding occurs; a bone graft cannula with a curved tip is used to precisely implant the fusion device into the anterior region of the intervertebral space, restoring intervertebral height through a self-locking structure; finally, a universal pedicle screw is percutaneously implanted for fixation. This method reduces the risk of nerve injury, improves surgical safety and efficiency, and is suitable for patients with lumbar spondylolisthesis complicated by spinal stenosis.

The circular saw blade comprises a cutter body, a plurality of tooth portions are arranged on the edge of the cutter body, tooth holders are arranged on the tooth portions, cutter head units are connected to the tooth holders, cutter head root portions and cutter head top portions are arranged on the cutter head units, the section of each cutter head top portion is of a cone-like structure, and the cutter head root portions and the cutter head top portions are arranged on the cutter head root portions. The section of the tool bit root is of a rectangular-like structure, the section width of the tooth part is smaller than that of the tool bit unit, the tool bit unit comprises a tool bit side face and a cutting face which are arranged on the two sides, and in the same radial direction, the thickness of the side, close to the cutting face, of the tool bit side face is larger than that of the side, away from the cutting face, of the tool bit side face. According to the circular saw blade for machining the paddle-tumbler, burrs generated in the cutting process can be reduced, heat dissipation can be improved, the contact area between the circular saw blade and a cut product can be reduced, and the paddle-tumbler machining precision can be improved.

A circular saw includes an upper blade housing and a lower blade guard coupled to the upper blade housing. The lower blade guard rotates about an axis and includes a guide track. The circular saw includes a lever having a guide track engaging end and a user engaging end. The lever is coupled to the upper blade housing at a lever pivot point positioned between the guide track engaging end and the user engaging end. The guide track engaging end includes a contact member configured to engage the guide track to rotate the lower blade guard.

The utility model relates to the field of metal circular sawing machines, and discloses a saw cutting adjusting device of a metal circular sawing machine, which comprises a metal circular sawing machine frame provided with an adjusting protection mechanism; the adjusting protection mechanism comprises a moving block, a sawing table, a power motor, a lead screw, a side plate, a protection frame and an abutting plate. The moving block is vertically installed on the metal circular saw rack in a sliding mode, the top of the moving block is fixedly connected with the sawing table, the output end of the power motor is fixedly connected with the lead screw, the lead screw is in threaded connection with the moving block, the side face of the side plate is fixedly connected with the protection frame, and the abutting plate is fixedly installed on the top of the metal circular saw rack. The adjusting protection mechanism further comprises a supporting protection frame, a driving motor and a circular saw blade. The circular saw blade has the following advantages and effects that the saw cutting depth can be conveniently adjusted, the circular saw blade can be shielded through the protection frame, and the safety is improved.

The diamond circular saw blade is characterized in that a saw blade main body is provided with a mounting hole and saw teeth, and tool bits are mounted on the saw teeth; the tool bit is flat, the size of the tool bit is reduced, and the utilization rate of the side face of the tool bit is increased; the main cutting faces of any two adjacent tool bits incline towards different sides, the tool bits can form tool noses facing one side, the tool noses on the different sides of the tool bits are beneficial to rapidly smashing materials, and the sharpness of the saw blade is improved. And the service life of the saw blade can be prolonged by matching the matrix powder and the active powder of the tool bit.

The invention relates to the technical field of cutting, and discloses a cutting device for aluminum profile machining, which comprises a platen, an inverted L-shaped fixing plate is fixedly mounted on one side of the top of the platen, a mounting plate is mounted on the inner side of the inverted L-shaped fixing plate, a cutting motor is mounted on one side of the mounting plate, and a cutting circular saw blade is fixedly mounted at the output end of the cutting motor. A lifting cutting transmission part is installed on the inner side of the inverted-L-shaped fixing plate, a lifting rod is movably connected to the surface of the platen in an inserted mode, the lifting cutting transmission part is installed between the installation plate and the lifting rod, a cutting groove is formed in the platen, and two limiting check blocks are symmetrically and fixedly installed on one side of the top of the platen. Two adjustable clamping fixing pieces are symmetrically and fixedly mounted on one side of the top of the table plate; the cutting device for aluminum profile machining is provided with an automatic cutting structure and an automatic clamping and fixing structure, so that the cutting automation degree is effectively improved, and the aluminum profile cutting machining quality and machining efficiency are effectively improved.

The present invention relates to a sawing device for guiding a circular saw (30) on a guide rail (10), wherein the guide rail (10) is used to linearly guide the circular saw (30) in the longitudinal direction of the track, wherein the circular saw (30) has a dust removal device (34) downstream of the saw blade receiving portion (33). To facilitate the operation of such sawing devices, the present invention provides a chip guide adapter (50) having a housing (41) with a chip guide channel (51), wherein the chip guide channel (51) forms a connection between a dust removal device (34) and a chip collection channel (15) assigned to or capable of being assigned to a guide rail (10), wherein the sawing device has a separable mechanical interface, and wherein the mechanical interface is configured to enable the circular saw (30) to be separated from the chip guide adapter (50), to be disassembled, or to be separated from the guide rail (10) or the chip collection channel (51) at any position in the longitudinal direction of the guide rail (10).

This invention discloses a fully automatic metal honeycomb core automatic layout and cutting device, belonging to the field of metal cutting technology. It solves the technical defects of existing metal honeycomb core cutting equipment, such as core cell crushing and edge chipping, difficulty in active avoidance by the circular saw blade, and incomplete automated layout. The device includes a frame assembly, a workpiece feeding mechanism, a workpiece positioning unit, a workpiece clamping structure, a circular saw blade cutting moving component, a workpiece rotation mechanism, and a CNC control system. These systems work collaboratively to achieve fully automatic layout and cutting of the metal honeycomb core panels. The circular saw blade cutting moving component drives the circular saw blade to descend to the workpiece surface for follow-up cutting. After cutting, it actively avoids obstacles through lifting and lateral movement. The workpiece rotation mechanism is integrated with the workpiece clamping structure, enabling precise rotation of the honeycomb core. Combined with the fully automatic layout software built into the CNC system, it achieves a closed-loop automatic layout and cutting process.

The utility model relates to a material receiving module after circular saw web stamping, which comprises a disc, storage rods and a driving motor, the storage rods are distributed at preset positions of the disc, and the storage rods are fixedly connected with the disc; the driving motor drives the disc to rotate, so that the storage rods rotate along with the disc; and the storage rod is used for receiving products stamped by the stamping equipment. According to the material receiving module for the stamped circular saw blade, the structure is simple, the automation degree is high, and the working efficiency of material receiving is improved; and secondly, due to the existence of a brake mechanism and a detection sensor, the operation safety coefficient of the material receiving module is improved.

In a packaging for a circular insertion tool, in particular a circular saw blade, with a planar main body, which has a holding flange for fixing an associated insertion tool on the planar main body, the planar main body has a polygonal outer circumference, with a tab which is bendable in the direction of the holding flange being arranged on at least one side of the polygonal outer circumference.

The utility model discloses a trephine capable of quickly adjusting a cutter group locking device, which relates to the field of electric tools, a clutch transmission wheel is arranged in an openable head shell, a transmission convex ring II is arranged on the clutch transmission wheel and is arranged in a driving concave ring at the side part of a trephine blade, the clutch transmission wheel is arranged in the openable head shell, and the transmission convex ring II is arranged on the transmission convex ring II and is arranged in a driving concave ring at the side part of the trephine blade. The clutch transmission wheel is fixed on the clutch frame, the clutch frame is arranged in a movable cavity of the openable head shell, one end of the clutch frame is connected with the openable head shell through a positioning pin I, and the other end of the clutch frame is connected with the left-right tightness adjusting device through a positioning screw rod I. An adjusting seat is arranged in an upper linear guide groove and a lower linear guide groove of a main head shell, an upper guide column, a lower guide column and an adjusting screw rod are arranged on the adjusting seat, and the adjusting seat is driven to move forwards or backwards by shifting the adjusting screw rod. When the adjusting base moves forwards or backwards, the first front guide wheel set and the second front guide wheel set on the adjusting base can be erected or folded along with the inner side circle of the trephine blade, and adjustment is very convenient.