87 results about "Double edge" patented technology

The invention relates to the technical field of machining numerical control tools, in particular to a multifunctional indexable heavy boring head which comprises a main body, a blade seat and a blade, the main body comprises a body, a seat body and a connecting part which are integrally formed, the blade is fixedly installed on the blade seat, the seat body comprises a seat body H and a seat body S, the seat body H is higher than the seat body S, and the connecting part is connected with the seat body H; the blade seat comprises a blade seat H and a blade seat S, the blade seat H is higher than the blade seat S, the blade seat H is fixedly installed on one seat body, and the blade seat S is fixedly installed on the other seat body. The device has the advantages that the device is simple in overall structural design, easy to understand by an operator, small in accessory type number and convenient to assemble; by means of the same double-edge heavy boring head, switching between symmetrical boring and stepped boring can be achieved only by adjusting the position of the tool changing base on the base body and then adjusting the blade in the radial direction, tool changing is not needed, production efficiency is improved, switching is easy and convenient, and the tool storage pressure of a tool stock is reduced.

The utility model discloses a paper shearing machine for paper product printing, which belongs to the technical field of paper product cutting and comprises a mounting bottom plate, supporting legs, a connecting vertical plate, a top frame, a mounting cross beam and a cutting component. A downward pressing air cylinder extends and retracts to enable a moving plate to move up and down so that a double-edge pointed-end tool can penetrate through paper, the moving plate can be prevented from rotating through a sliding limiting rod, a driving motor rotates to drive an adjusting screw to rotate, and therefore a sliding block can transversely move in a sliding groove; according to the paper cutting device, the double-edge pointed-end cutter can transversely move to cut paper, so that no notch is formed in the cutting position, the pressing plate can press the paper before cutting, and the double-edge pointed-end cutter can fix the paper before being inserted into the paper through the elastic force of the sliding rod; and cutting position deviation caused by the fact that the paper is not fixed when the double-edge pointed-end cutter penetrates through the paper is avoided.

The utility model is applicable to the technical field of raw material strip processing equipment, and provides a cutting device and a cutting system.The cutting device comprises a strip cutting assembly, the strip cutting assembly comprises a double-edge cutter used for performing cutter pushing action and cutter retracting action, and when the double-edge cutter performs the cutter pushing action and the cutter retracting action, the double-edge cutter is driven by the cutter pushing action and the cutter retracting action. Performing primary cutting on the raw material strips extruded and formed by the strip extruding machine so as to cut the raw material strips into a plurality of raw material sections; and the dicing assembly comprises a plurality of cutter sets used for cutting the raw material sections into a plurality of raw material blocks, and the distance between the cutter sets can be adjusted. By arranging the double-edge cutters, one-time cutting can be carried out in the processes of pushing the double-edge cutters and retracting the double-edge cutters respectively, the time that blades are extruded by materials is shortened, the problem that notches of raw material strips are uneven can be effectively solved, the cutting yield of raw material blocks is increased, the distance between the cutter sets is adjustable, and the cutting efficiency is improved. The size of the raw material block can be flexibly controlled, and the raw material block yield is further improved.

The invention discloses a method for improving double-strand folding control, which comprises the following steps of: (1) controlling the size of a blank, and increasing the width of a rolled piece by 50mm when the broadening ratio is greater than or equal to 1.5; when the broadening ratio is smaller than 1.5, the width of the rolled piece is increased by 20 mm; rolling a plate with the thickness greater than or equal to 50mm, and adding 50mm to the head and the tail of a rolled Rolling a plate with the thickness of less than 50mm, and adding 60mm to the head and the tail of the rolled piece; (3) inspection: (1) measuring the width before cutting, if the width is insufficient due to double-strand folding, contacting an operator to confirm, and moving a cutter after confirmation; and (2) coloring four corners of the steel plate after double edges of the steel plate are cut off, checking whether cracks exist or not, performing uniform cutting after ruler placement according to sampling technical requirements, and timely contacting an operator to perform field confirmation if the cracks are found, so that the rolling plate shape and the size accuracy are accurately controlled by optimizing the rolling process and controlling the multi-pass PPO plane shape, and the quality of the steel plate is improved. In the cutting process, whether double-strand folding of the cutting face is cut clean is checked, four vertex angles are subjected to dye penetrant inspection, and the steel plate yield is effectively increased.

The utility model relates to the technical field of card senders, in particular to an edge folding card sender which comprises a machine table, a stock bin, a feeding belt group, a bracket, a supporting plate, a lower conveying belt group, an upper conveying belt group and two edge folding assemblies. The edge folding assembly comprises an L-shaped guide plate arranged on the supporting plate, an edge folding plate connected with the L-shaped guide plate and an edge folding pressing plate arranged above the supporting plate and located on the inner side of the L-shaped guide plate and the inner side of the edge folding plate, the top face of the L-shaped guide plate is provided with a tilting guide inclined face, the inner side face of the edge folding plate is provided with an edge folding inclined face, and a material passing gap is formed between the edge folding pressing plate and the supporting plate. An edge folding gap is formed between the edge folding pressing plate and the edge folding inclined surface; in the conveying direction of the upper conveying belt set, the tilting guide inclined face inclines from bottom to top, and the edge folding inclined face inclines from outside to inside. According to the paperboard folding device, the paperboard can be subjected to edge folding forming while single paperboard output is achieved, the edge folding assembly is disassembled or assembled or the position of the edge folding assembly is adjusted according to actual requirements, and the edge folding effect on the single edge or the double edges of the paperboard can be achieved.

1. Name of the product in this design: Toy (Rotating Double-Edged Laser Sword). 2. Intended use of this design: for toys. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

A two-cutting-edge parting insert including a first cutting portion, a second cutting portion and an elongated body portion connecting the first and second cutting portions. The elongated body portion has a body width (BW) measurable parallel to a lateral axis and a body length (BL) measurable parallel to an elongation axis. The body width is smaller than both cut widths of the cutting edges of the first and second body portions and fulfills the condition: 0.65 mm≤BW≤0.95 mm; and the body length fulfills the condition: 2 mm≤BL≤14 mm.

The utility model discloses a double-edge dislocation cutting round nose milling cutter which comprises a supporting plate, a transmission rod, a bearing plate, a limiting plate, a linkage toothed plate, a round nose milling cutter and a linkage adjusting mechanism, the supporting plate is fixed on an external machine tool, the transmission rod is rotatably connected to the supporting plate, the bearing plate is rotatably connected to one end of the transmission rod, the limiting plate is fixed on one side of the bearing plate, and the linkage toothed plate is fixed on the other side of the bearing plate. The linkage toothed plate is clamped in the limiting plate in a sliding mode, and the round nose milling cutter is arranged at one end of the linkage toothed plate. The linkage adjusting mechanism has the beneficial effects that the driven fluted disc is meshed and linked with the linkage toothed plate through the synchronous linkage structure of the first cam, the second cam and the transmission rod in the linkage adjusting mechanism and the phase difference design of cam curves, so that the axial adjustment of the round nose milling cutter is realized, and the service life of the round nose milling cutter is prolonged. And meanwhile, the second abutting plate rotates to drive the bearing plate to deflect, radial adjustment of the round nose milling cutter is achieved, axial feeding and radial compensation motion are coupled to a single driving system, and continuous track control over a milling path is achieved.

The utility model discloses a double-edged spherical milling cutter with a shock absorption function, which relates to the field of milling cutters and comprises a cutter handle and a cutter head, one end of the cutter handle is connected with the cutter head, the other end of the cutter handle is provided with an annular groove, a connecting seat is slidably sleeved on the outer side of the top end of the cutter handle, ball blocks are slidably connected in the connecting seat at equal intervals, and one side of each ball block is embedded in the annular groove. A connecting seat is arranged on the knife handle, threads are arranged on the outer side of the connecting seat, the connecting seat is in threaded connection with an adjusting cylinder through the threads on the outer side, and the distance between the inner wall of the adjusting cylinder and the outer wall of the connecting seat is gradually increased in a stepped mode from bottom to top. The ball block is tightly embedded into the annular groove of the cutter handle, firm and stable connection is achieved, the stability of the milling cutter in the milling process is enhanced, the milling precision can be improved, and it is guaranteed that a machined workpiece is accurate in size and smooth in surface.

The invention discloses a sharp-corner double-edge numerical control woodworking turning tool which mainly comprises a tool bar and a mechanically-clamped tool bit. The cutter bar is formed by machining carbon steel subjected to carbon hardening and tempering. The mechanically-clamped tool bit is designed into forward and reverse bidirectional symmetrical cutting edges, the included angle between forward and reverse main cutting edges is 30-35 degrees, the auxiliary declination angle is zero, and the width of each auxiliary cutting edge is 1-3 mm. The cutting edge inclination angle is zero or negative, the front angle is about 45 degrees, the rear angle is 10-15 degrees, and the auxiliary rear angle is 1-2 degrees. And one or more layers of composite hard and wear-resistant coatings are coated on the surface of the tool bit matrix by adopting a vapor deposition method. The sharp-corner double-edge numerical control woodworking turning tool is easy to cut, low in cost and long in service life, and is particularly suitable for turning various variable-diameter arc shapes in soft non-metal materials such as wood and plastic.

The invention discloses a slotting method of a DDR5 product, and relates to the technical field of packaging substrates. The method comprises the following steps: obtaining a copper-clad substrate, and drilling the copper-clad substrate; manufacturing a circuit and a lead on the surface of the copper-clad substrate; arranging a solder mask layer on the surface of the copper-clad substrate, and windowing the solder mask layer to expose a bonding pad and a lead; attaching a photosensitive dry film on the surface of the solder mask, exposing and developing the photosensitive dry film, exposing the bonding pad, and covering the lead; electroplating a soft gold layer on the bonding pad; removing the photosensitive dry film, and removing the lead through alkaline etching; carrying out layered groove milling on the copper-clad substrate by adopting a left-handed double-edged cutter to form an open groove; carrying out plate milling on the copper-clad substrate to form a formed small plate; and cleaning, detecting and packaging the formed small plate. According to the method provided by the embodiment of the invention, the grooving quality can be improved, and the problems of burr generation or substrate cracking and the like are avoided.

1. Name of the product in this design: Razor Handle (Fixed Double Blade). 2. Purpose of this design: For use as a handle for a razor. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

A galling and film covering integrated tool is characterized in that a galling device adopts a palm fiber brush (10) with the same length as a plastic film for covering, and is finally fixed on a fixed frame body; according to the film covering device capable of being pulled up, a frame body is formed by welding round steel (7) into an L shape and then splicing the round steel into the L shape, the splicing position is completed through a movable nut, and a movable hollow steel pipe (8) needs to penetrate into the frame body; two hanging rings (6) need to be welded to the two sides of the frame body and are connected to pulleys (13) for fixing the frame body through ropes. The film covering device is connected with the galling device through a pull ring; a double-edge blade (4) is welded at the end part of the film cutting device and is used for cutting a film; in addition, a roller (14) is arranged on the outer side of the covering plastic film. According to the utility model, two work of galling and film covering are integrated, and two functions of lifting of a film covering device and cutting of a film are also realized, so that the traditional work is simplified, and the efficiency of site construction is improved.

The utility model discloses a high-speed packaging machine, and relates to the technical field of heat shrinkage film corner cutting packaging. The high-speed packaging machine comprises a film supply device used for expanding a folded double-layer film, so that a containing space is formed between the double-layer film; the feeding device is used for continuously pushing the packing materials into the accommodating space from the first opening or the second opening according to a certain rhythm; a hot cutting mechanism of the edge sealing device is used for performing edge sealing and hot cutting on the double-layer film of the second opening; and a double-edged knife assembly of the cutting device is used for cutting the double-layer film sealing edge between two adjacent packaging materials into independent packaging materials, and meanwhile, four regular corners which can be conveniently cut off in the subsequent corner cutting procedure are formed. By integrating a plurality of working procedures such as film supplying, feeding, edge sealing and corner cutting, continuous operation is performed in the product moving process, and high-speed corner cutting packaging is achieved. And meanwhile, it is ensured that hot cutting lines of the four corners of the packaging material are well attached to the edges of the product, and the high-quality and attractive requirements of high-end product packaging are met.

The invention relates to a method for realizing service life detection of a sharpening machine cutter. The method comprises the following steps: (1) adopting a split type double-edged cutter structure; (2) sequentially adding special powder metallurgy hard alloy into a blade material, passivating a cutting edge of the cutter, adding a CVD (chemical vapor deposition) composite coating on the surface of the cutter and polishing the whole cutter, so as to complete the modification of the cutter; and (3) determining the service life of the cutter of the sharpening machine by adopting a nano-scratch method through measuring the critical loads on different coatings of the cutter and combining the actual use condition of the same working condition. The invention further relates to a corresponding split type double-edged cutter structure. By adopting the method for detecting the service life of the cutter of the sharpening machine and the corresponding cutter structure, the service life of the cutter can be prolonged, and the cutter does not need to be replaced when the sharpening machine is used for fifty thousand times; and meanwhile, the service life of the sharpening machine cutter can be easily judged by using a nano-scratch method, and field testing is not needed.

The application discloses a slotting method for a DDR5 product and relates to the technical field of packaging substrates. The method comprises the following steps: obtaining a copper-clad substrate and drilling the copper-clad substrate; manufacturing lines and leads on the surface of the copper-clad substrate; setting a solder resist layer on the surface of the copper-clad substrate and performing windowing on the solder resist layer to expose the pads and the leads; attaching a photosensitive dry film to the surface of the solder resist layer and performing exposure and development on the photosensitive dry film to expose the pads and cover the leads; electroplating a soft gold layer on the pads; removing the photosensitive dry film and removing the leads through alkaline etching; performing layer-by-layer milling on the copper-clad substrate by using a left-handed double-blade knife to form slotting; milling the copper-clad substrate to form a shaped small plate; and cleaning, detecting and packaging the shaped small plate. According to the method, the slotting quality can be improved, and problems such as burrs or substrate cracking can be avoided.

The application belongs to the technical field of polishing equipment, and particularly provides a glass straight-line double-edge polishing equipment, which comprises a rack, one side of the rack is respectively provided with a motor three and a motor four at both ends, the output end of the motor three is connected with a main belt pulley one, the lower side of the main belt pulley one is provided with a secondary belt pulley two, the output end of the motor four is connected with a main belt pulley two, the upper side of the main belt pulley two is provided with a secondary belt pulley five, the secondary belt pulley five is connected with the main belt pulley one through a driving main shaft one, and the secondary belt pulley two is connected with the main belt pulley two through a driving main shaft two; the other side of the rack is provided with a fixed column at both ends, the corresponding side edges of the fixed column are respectively provided with a secondary belt pulley one and a secondary belt pulley four, and the lower sides of the secondary belt pulley one and the secondary belt pulley four are respectively provided with a secondary belt pulley three and a secondary belt pulley six; the glass processing requirements of different specifications and sizes are adapted, the flatness and smoothness of the polished glass side edges are ensured, and the risk of scratching the glass edges is reduced.

The utility model relates to the technical field of medical instruments, in particular to an alveolar ridge crest mucosa double-edged knife which comprises a double-edged blade, the double-edged blade comprises a cutting portion and a mounting portion, the cutting portion is of a V-shaped structure, double edges are located on the two sides of the V shape, and the included angle of the V shape ranges from 20 degrees to 30 degrees. A stepped hole used for being installed on the handle is formed in the installation portion of the double-edge blade, a clamping portion is further arranged on the double-edge blade, the clamping portion is located in the area between the V-shaped structure of the double-edge blade and the stepped hole, and the clamping portion is used for being matched with clamping pliers to achieve disassembly and assembly. When the blade is used for intraoral cutting, cutting, picking and other actions can be adopted at the same time, repeated cutting is not needed to act on the two sides of a mucous membrane, operation efficiency can be improved, finer and more uniform cutting can be achieved, and the technical problems that an existing single-edge cutting knife is limited in flexibility in use and needs repeated cutting are solved.

The utility model relates to the technical field of glass product processing, and discloses double-edge grinding equipment for glass product processing, which comprises a bottom plate, a pushing mechanism is arranged at the top of the bottom plate, the pushing mechanism comprises a pushing box, the pushing box is fixedly connected with the bottom plate, and a first motor is fixedly mounted on one side of an inner cavity of the pushing box. By arranging the pushing mechanism, the glass blank can be adsorbed by opening a plurality of vacuum chucks, so that the glass blank is stable, the position of the glass blank can be adjusted by opening a first motor, the glass blank can be conveniently matched with the polishing mechanism for polishing, and the polishing efficiency is improved by arranging the polishing mechanism. Two grinding motors are turned on to drive two grinding pieces to rotate, the two sides of a glass blank can be ground, a second motor is turned on, the distance between the two grinding pieces can be adjusted, and the glass blanks with different widths can be ground conveniently.

An example apparatus includes a phase detector and a phase error detector. The phase detector may set a state signal to indicate a state of a phase difference between a reference clock and a feedback clock generated by a clock tracking circuit to track the reference clock. The phase error detector may set an error signal proportional to a phase difference between the reference clock and the feedback clock. The phase error detector for changing from being triggered only by edges of the reference clock and the feedback clock having a first polarity to being triggered by edges of the reference clock and the feedback clock having the first polarity and being triggered by edges of the reference clock and the feedback clock having a second polarity, at least in part in response to the state signal The second polarity is different from the first polarity.

The utility model discloses a double edge boring cutter, including boring cutter body and two boring cutters, the front of boring cutter body is equipped with the mounting groove, is used to accommodate two boring cutters, and two boring cutters reverse parallel arrangement, the two ends of boring cutter head part are equipped with the export respectively on the mounting groove, and the export width is equal to boring cutter's handle width, and the head of boring cutter is stretched out, makes boring cutter to be able to adjust the position along the mounting groove freely, the waist type hole is equipped with on boring cutter and is close to its head one end, and the mounting groove bottom is equipped with a plurality of with the waist type hole matched mounting screw hole, and boring cutter is fixedly arranged in the mounting groove through fixed bolt. The design optimized boring cutter and boring cutter body's fixed mode and the structure of mounting groove, and boring cutter and boring cutter body adopt the front bolt fixed, cooperate the mounting groove opening design to make boring cutter's stability stronger, can be used for more accurate equipment manufacturing.

The utility model relates to the technical field of milling cutters, and discloses a convenient-to-adjust embedded double-edge milling cutter which comprises a milling cutter main body, a milling cutter mounting handle fixedly connected to the bottom of the milling cutter main body, a connecting rod fixedly connected to the top of the milling cutter main body, a mounting mechanism arranged on the outer side of the connecting rod, and a position adjusting mechanism arranged on the outer side of the mounting mechanism. According to the embedded double-edge milling cutter convenient to adjust, through the arranged position adjusting mechanism, the cutting tool can be mounted or dismounted only by rotating the mounting bolt, meanwhile, the clamping frame is slidably connected to the outer side of the mounting frame, and through a plurality of hole grooves formed in the left side and the right side of the mounting frame and corresponding to the bolt and the threaded cylinder, the cutting tool can be mounted or dismounted; according to the milling cutter, the sliding clamping frame is arranged on the outer side of the mounting frame, so that a worker can adjust the mounting position of the sliding clamping frame on the outer side of the mounting frame according to use requirements, meanwhile, the number, the direction and other conditions of the cutting tools can be adjusted, the whole milling cutter can meet specific cutting operation requirements to the greatest extent during use, and the worker can use the milling cutter conveniently.

This utility model discloses a double-bladed stamping die in the field of stamping die technology, comprising: an upper die assembly and a lower die assembly arranged vertically. Both the lower part of the upper die assembly and the upper part of the lower die assembly are detachably equipped with cutting strips. Two cutting strips are designated as an upper cutter and a lower cutter, each with a left-right extending blade. The upper and lower cutters are positioned front-to-back in the vertical direction, with their blades aligned vertically. In this double-bladed stamping die, the upper and lower cutters interlock, shearing and punching the material between the upper and lower die assemblies using their blades. This double-bladed shearing and punching method reduces the punching force requirement, prevents excessive blade wear, and improves the cross-sectional quality of the sheared material. Both the upper and lower cutters are detachable, allowing for timely removal and replacement after blade damage, facilitating maintenance and reducing maintenance costs.

The invention relates to the technical field of strip steel camber measurement, and discloses bilateral following type cold-rolled strip steel camber measuring equipment which comprises a portal frame, a strip steel sheet is arranged on the lower side of the portal frame, a measuring assembly is arranged on the upper side of the portal frame, a cleaning assembly is arranged at the position, close to the middle, of the lower end of the portal frame, and a pollution discharge assembly is arranged at the lower end of the portal frame. The measuring assembly comprises a shell fixedly arranged on the portal frame, linear servo motion modules are fixedly arranged in cavities in the two sides of the shell, industrial cameras are fixedly arranged on moving parts of the linear servo motion modules, and light source lamps are fixedly arranged on the two sides of the moving parts of the linear servo motion modules in an inclined mode. Two glass plates are fixedly arranged at the bottom of the shell. According to the bilateral following type camber measuring equipment for the cold-rolled strip steel, through overall cooperative use, the height difference of the two sides of the fixing frame can jack up the direction rod, so that the cleaning roller effectively makes contact with the surface of a glass plate, and effective cleaning work is achieved.

The utility model relates to curling equipment for metal covered edges of pot covers, which is characterized by comprising a base, two curling machines mounted on the base, a controller mounted on the curling machines, two operating stations arranged on the base, a mounting seat connected to the middle of the base, a rotating ring rotatably connected to the mounting seat, a gear ring connected to the bottom of the rotating ring, and a pressing plate connected to the gear ring. The side edge of the mounting seat is connected with a first fixing seat, the first fixing seat is provided with a first motor, the controller is in wired connection with the first motor, an output shaft of the first motor is connected with a gear, the gear is meshed with the gear ring, the rotating ring is provided with a feeding assembly used for placing metal rings, and the base is provided with a discharging assembly used for storing metal ring raw materials. The double-station double-crimping machine has the advantages that a worker does not need to make close contact with mechanical equipment through the alternate design of the double stations and the double crimping machines, seamless connection between the two operation stations is achieved through synchronous movement of the rotating ring and the feeding assembly, work efficiency is improved, and personal safety in the operation process is guaranteed.

1. Name of the product in this design: Bottle (Double-edged). 2. Purpose of this design: Container for holding liquids. 3. The key design features of this product are the combination of shape and pattern. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The utility model discloses an integral hard alloy double-edge T-shaped cutter which is characterized in that the integral hard alloy double-edge T-shaped cutter comprises a cutter handle, a cutting cutter head is arranged at the tail end of the cutter handle, and the cutting cutter head is of a double-edge cutting structure arranged on a cylindrical cutting section; a first cutting edge and a second cutting edge which are symmetrically arranged along the axis of the cutting surface are arranged on the cutting surface of the double-edge cutting structure; a circumferential edge is arranged on a spiral cutting edge of the double-edge cutting structure; front end teeth are arranged at the front end of the double-edge cutting structure; and rear end teeth are arranged at the rear end of the double-edge cutting structure. The integral type hard alloy double-edge T-shaped cutter is specially developed for plastic products, the special T-shaped design is adopted, the products can be machined and formed at a time through the arc characteristic design of the cutting edges, and the machining efficiency is greatly improved; and due to the unique cutter angle design, no burr is left after the product is machined, and the appearance quality is guaranteed.

The double-edge boring cutter comprises a cutter handle, one end of the cutter handle is provided with a machine tool standard taper shank connector, the other end of the cutter handle is fixedly connected with a cutter bar, the other end of the cutter bar is fixedly connected with a cutter head, the side face of the other end of the cutter head is oppositely provided with a horizontal square hole I and a horizontal square hole II which are parallel to each other, a boring cutter I is arranged in the horizontal square hole I, and boring cutters II are arranged in the horizontal square hole II. An adjusting gasket I is arranged on the side face of the boring cutter I in the horizontal square hole I. An adjusting gasket II is arranged on the side face of the boring cutter II in the horizontal square hole II. The invention further discloses an application method of the double-edge boring cutter. According to the double-edge boring cutter and the application method thereof, the problems of long machining period, low efficiency and high machining cost when the arc surface of the hook body of a large hook is machined in the prior art are solved.

1. The name of the design product: double blade electric knife sharpener (SJ5525M). 2. The use of the design product: for sharpening knives. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

The utility model relates to the technical field of double-edge milling cutters, and discloses a tool bit replaceable type double-edge milling cutter which comprises a cutter holder, a connecting block is fixedly connected to the top end of the cutter holder, a tool bit body is fixedly connected to the top end of the connecting block, a connecting seat is arranged at the bottom end of the cutter holder, and a plurality of fixing assemblies are arranged on the outer side of the inner wall of the connecting seat. The fixing assembly is arranged in the middle of the inner wall of the connecting base and used for fixing the tool bit body, the ejection assembly is arranged in the middle of the inner wall of the connecting base and used for driving the fixing assembly to limit the tool apron, the heat dissipation assembly is arranged on the inner wall of the tool apron and used for conducting heat dissipation on the tool bit body, and the water supply assembly is arranged on the outer wall of the connecting base and used for supplying water to the heat dissipation assembly. According to the utility model, through downward movement of the conical block, limitation of the conical block to the fixed rod is relieved, through inward movement of the fixed rod by the spring, limitation of the fixed rod to the tool apron is relieved, and the tool bit body on the tool apron is detached, so that the tool bit body is convenient to replace.