86 results about "Hard metals" patented technology

The invention relates to the field of hard alloy product production, in particular to a production method of a high-toughness and wear-resistant hard alloy. A production method of a high-toughness and wear-resistant hard alloy comprises the following steps that S1, raw materials including, by mass, 40%-45% of WC powder, 25%-35% of Fe powder, 3%-5% of Si powder, 0.95%-1.16% of C powder, 2.5%-3.2% of Ni powder, 9%-12% of Co powder, 1.75%-2.05% of Mo powder and 0.15%-0.3% of VC powder are taken, and the purities of all the powder components are all larger than 99%; s2, mixing the raw material powder in the step S1 with a ball milling medium according to a ratio, and mixing by adopting a wet ball milling process; s3, drying the slurry, and sieving to prepare granules; s4, pressing the granules into a hard alloy blank; s5, the hard alloy blank is sintered in a vacuum or low-pressure sintering furnace, and the sintering temperature is controlled to be 1180-1250 DEG C; and S6, after sintering is completed, a sintered body is cooled, precision machining is conducted according to requirements, and a product is obtained. The high toughness and wear resistance of the hard alloy material are remarkably improved.

The utility model discloses a limitable hard alloy processing clamping device which comprises a base, supporting seats and a fixed clamping plate, a bearing plate is rotatably connected to the upper end of the base, the supporting seats are arranged on the left side and the right side of the bearing plate in an attached mode, and the supporting seats move left and right on the bearing plate. A movable plate used for limiting is arranged at the lower end of the supporting seat, round covers are fixedly connected to the left side and the right side of the bearing plate correspondingly, and cooling fans are installed in the round covers. According to the limitable hard alloy machining clamping device, hard alloy of different sizes can be conveniently borne, the hard alloy is stably clamped by combining the fixed clamping plate, the bearing plate can rotate at the upper end of the base, the machining angle of the hard alloy is adjusted during machining, and the machining precision is improved. And in combination with a cooling fan, the machined hard alloy can be blown for heat dissipation and cooling, and operators are prevented from being scalded by the too high temperature of the hard alloy during material taking.

The application discloses a multi-blade hard alloy cutting tooth and application, which comprises a cylindrical base body, an upper outer cutting unit and a lower outer cutting unit are arranged on the outer wall of the cylindrical base body; an upper inner concave structure is arranged on the top surface of the cylindrical base body, and a lower inner concave structure is arranged on the bottom surface of the cylindrical base body; an upper inner cutting unit is arranged at the center of the upper inner concave structure, and a lower inner cutting unit is arranged at the center of the lower inner concave structure. The application realizes good cutting ability through a plurality of sharp cutting edges, improves stress concentration effect and thus improves cutting efficiency. The application is provided with the inner concave structure, so that the cutting tooth has good chip breaking capacity, can reduce the formation of long iron chips and prevent repeated crushing caused by the accumulation of iron chips at the bottom of the drill bit. The application can be mass-produced and avoids the unevenness of random broken hard alloy particles.

A stud (100) for improving grip of a tyre (200). The stud (100) comprises a body (120) comprising a base flange (140) and a second part (130), the second part (130) being joined to the base flange (140), and a pin (110) protruding from the second part (130) in the longitudinal direction (Sz) of the stud (100). The pin (110) comprises hard metal or ceramic. The base flange (140) has a first cross-section having a first area (A140). The pin (110) has a second cross-section having a second area (A110). A ratio (A140 / A110) of the first area (A140) to the second area (A110) is 6.5 to 21. Moreover, the pin (110) protrudes a first height (H110) from the second part (130) such that a ratio (A140 / H110) of the first area (A140) to the first height (H110) is 20 to 50 mm2 / mm.

The invention discloses a cushion block composite layer for a semiconductor, a preparation method and a cushion block, the cushion block composite layer sequentially comprises a composite coating and a surface microstructure from a substrate close to beryllium copper to a position far away from the substrate, and the composite coating sequentially comprises a chromium transition layer, an alpha-diamond-like carbon layer and a self-lubricating layer doped with tungsten disulfide from a position close to the substrate to a position far away from the substrate. Hard metal carbide reinforced phase crystal grains are uniformly distributed in the alpha-diamond-like carbon layer; the surface micro-texture comprises a plurality of pits, and each pit is filled with a nano-particle solid lubricant; through the structure, the cushion block is compatible with the high process temperature, an additional cooling device is not needed, and the interface shear stress of the composite layer is reduced, so that the copper powder falling amount is greatly reduced, the hardness, the wear-resisting life, the wear-resisting particle penetrability and the high recognition accuracy of the cushion block are greatly improved, and the low friction coefficient of the surface is maintained; and the roughness is still kept at a lower level after the lead frame is carried for multiple times.

The invention discloses a light vehicle suspension component, and relates to the field of vehicle suspension components, the light vehicle suspension component comprises an anti-roll rod, the two ends of the anti-roll rod are connected with lining assemblies, and each lining assembly comprises a hard metal lining connected to the outer wall of the anti-roll rod in a sleeving mode. The universal assembly and the lining assembly are combined to serve as a connecting piece between the anti-roll rod and the frame, multi-angle rotation and power transmission can be achieved through the universal assembly, the universal assembly can be used for occasions where relative movement among components is allowed and torque or force is transmitted at the same time, the anti-roll rod is allowed to move relatively in multiple directions, and the anti-roll rod can rotate in multiple directions. Under the condition, in the same period, abrasion of the lining assembly and breakage of molecular chains can be relatively relieved, then the service life of the lining assembly is prolonged, then the material characteristics of the first flexible sleeve and the second flexible sleeve can be utilized, tiny displacement between the frame and the anti-roll bar is absorbed, stress concentration caused by rigid connection is avoided, and the service life of the anti-roll bar is prolonged. And roll control and comfort balance are optimized.

The utility model relates to a kind of hard alloy assembly pinch roll, belong to steel rolling equipment technical field.The pinch roll includes roll ring, base and cover plate;The base and cover plate are all ladder shaft structure, and are divided into thick section and thin section;The base is coaxially arranged with cover plate and thin section is opposite, is fixedly connected by fastener, and two thin sections butt joint form the roll ring installation groove extending in circumference;The base and cover plate central through hole are equipped with inner hole;The roll ring is set in base and cover plate outer, and the inner hole of roll ring is equipped with the convex extending in circumference, the convex and the roll ring installation groove shape are matched and there is radial and axial interference fit.The utility model realizes the consideration of economy and durability by assembly structure, and reduces the instability of non-integral structure by structural design.

A method for producing a housing for a rotary piston engine, a shell housing, and a housing for a rotary piston engine, are disclosed. A bushing of hard metal is pressed into a shell housing main body with a trochoidal raceway in such a manner that an external circumferential contour of the bushing bears in a sealing manner on the trochoidal raceway and the trochoidal raceway is cladded via the bushing.

The invention relates to the technical field of milling machine tools, and discloses a hard alloy milling cutter milling machine tool with adjustable milling depth, which comprises a scrap suction part, a cleaning part and a maintenance part. The scrap suction part comprises a suction adjusting piece connected with the X-axis moving platform in a sliding and lifting mode and an air suction piece arranged on the machine base, the suction adjusting piece comprises an electric rod, a rubber pipe and a plurality of conical openings penetrating through the rubber pipe, an adjusting positioning part is arranged on the outer side of the rubber pipe, positioning is achieved by inserting a hollow rod into a fixing hole, and scrap suction dead angles are eliminated. The cleaning and wiping part comprises a rotary fixing piece connected with the air suction piece and a wiping piece penetrating through the suction adjusting piece, and the angle of the rubber pipe can be rotationally adjusted after the rotary fixing piece is unfixed, so that the cotton brush is switched from the scrap suction mode to the cleaning mode. The maintenance part comprises a sheath part and a supply part, supplies lubricating oil and protects the milling cutter in a matched mode. Integration and space reuse of chip suction, cleaning and maintenance functions are achieved, the device is adaptive to the shape of a workpiece, and the machining and cleaning efficiency and effect are improved.

The utility model discloses a paper box forming machine with a hard handle, which comprises a box body forming mechanism, baffles arranged on the left side and the right side corresponding to the discharging end of the box body forming mechanism, a supporting plate fixedly arranged above the baffles, movable supporting plates arranged on the left side and the right side of the supporting plate, and a metal wire traction roller group arranged on the left side and the right side of the supporting plate, the metal wire traction roller set can drag a metal wire to the position above the supporting plate and the movable supporting plate, a first bending pressing block capable of ascending and descending is arranged corresponding to the movable supporting plate, and after the first bending pressing block and the movable supporting plate are matched to complete bending of the end of the metal wire, the movable supporting plate moves to be separated from the metal wire. Second bending pressing blocks capable of ascending and descending are arranged on the two sides of the corresponding supporting plate, movable wire pressing blocks are arranged on the outer sides of the corresponding baffles, and the wire pressing blocks are matched with the baffles to insert the first bending parts at the two ends of the metal wires into the formed box body. According to the utility model, the hard metal wire can be automatically bent into a handle shape and is connected to a paper box.

The invention relates to the technical field of union connecting structures, in particular to a union connecting structure for an outlet of a fracturing pump and a wing-shaped nut dismounting and mounting device. The union connecting structure comprises a union female head, a union male head and a wing-shaped nut, and a pressing auxiliary boss is arranged in the middle of the inner side of the wing-shaped nut; the male union head and the female union head are arranged on the two sides of the pressing auxiliary boss in a bilateral symmetry mode and connected with the inner side of the wing-shaped nut through threads, the male union head and the female union head are sealed through an outer sealing assembly and the wing-shaped nut, and the outer sealing assembly comprises a hard metal ring and a rubber seal. A hard metal ring and a rubber seal are sequentially arranged between the left end of the male union and the right side of the pressing auxiliary boss from left to right. The union is reasonable and compact in structure and convenient to use, direct contact is avoided when the male union head and the female union head are pressed by arranging the pressing auxiliary boss, shear stress and pressing stress existing in traditional connection are converted into single axial pressing force, material abrasion is greatly reduced, and the service life is prolonged.

The present application relates to the technical field of metal composite plate preparation, and particularly relates to a self-riveting microstructure metal composite plate mold pressing forming method. The method comprises the following steps: step S1: preparing a self-riveting microgroove structure on the riveting surface of a hard metal plate; step S2: preparing a self-riveting microconvex structure on the riveting surface of a soft metal plate; step S3: annealing the soft metal plate; step S4: pretreating the riveting surfaces of the soft and hard metal plates; step S5: fixing the riveting surfaces of the soft and hard metal plates face to face, so that the self-riveting microconvex structure and the self-riveting microgroove structure are one-to-one correspondingly inserted to form a laminated plate; step S6: preheating the laminated plate by copper foil cladding; step S7: mold pressing the laminated plate to obtain a composite plate; and step S8: annealing the composite plate. The present application realizes high-strength mechanical riveting and metallurgical bonding dual reinforcement interface of the soft and hard metal composite plate, and improves the comprehensive performance and reliability of the composite plate.

The utility model relates to the technical field of track fasteners, in particular to an anti-loosening adjustable track traffic fastener system which comprises an elastic base plate arranged below a steel rail and elastic strips arranged on the left side and the right side of the steel rail respectively and used for stabilizing the steel rail, one end of each elastic strip is indirectly buckled on the lower plane of the steel rail, and the other end of each elastic strip is buckled on a gauge apron. The hard metal structure respectively penetrates through the elastic strip and the elastic base plate from top to bottom; the sleeve is matched with the hard metal structure; a spiral protruding cylindrical structure is arranged on the surface of the lower part of the hard metal structure; spiral grooves of inverted triangular structures are formed in the inner surface of the sleeve at equal intervals, and the spiral grooves can be tightly attached to the spiral protrusions; the fastener system is remarkably superior to an existing fastener system in the aspects of resonance resistance of the elastic strips, looseness resistance of the screw spikes and steel rail adjusting capacity, and stability, safety and maintenance economy of a rail are effectively improved.

The utility model belongs to the technical field of prestressed anchorage device clamping piece machining, and particularly relates to a reaming device for prestressed anchorage device clamping piece machining, which comprises a reaming machine and a workbench assembled on the reaming machine, a clamping block is connected to the inner side wall of a support frame at the top end of the workbench, a cooling fan is mounted on the outer side wall of a mounting plate, and the cooling fan is connected with the workbench. An electric rod is installed on the outer side wall of the fixing block, the telescopic end of the electric rod is connected with a cleaning brush, the cleaning brush is driven by the electric rod to operate, and in combination with a cooling fan, metal scraps attached to the surface of the two-way threaded rod are effectively removed, so that the scraps are prevented from hindering movement of the supporting frame, and the service life of the supporting frame is prolonged. Therefore, unnecessary friction and abrasion between the bidirectional threaded rod and the support frame are avoided. Therefore, the situation that hard metal chippings are clamped between the contact faces of the two-way threaded rod and the supporting frame is reduced, mutual abrasion of the two-way threaded rod and the supporting frame during movement is remarkably reduced, the stability of the whole structure is improved, and the service life is prolonged.

The utility model discloses a kind of hard alloy cutting edge welding positioning devices for superhard drill bit, including base, driving motor, positive and negative toothed bar, sliding block, U-shaped support, gear disc, circular ring, bolt, rubber pad and angle adjusting mechanism etc., angle adjusting mechanism contains support rod, fixed disc, limit hole, rotating shaft, gear column, bolt etc..Through driving motor drives positive and negative toothed bar, make sliding block move along sliding slot, adjust two circular ring spacing, rotate bolt, let rubber pad clamping cutting edge, rotate handle, through gear column and gear disc meshing adjustment angle, bolt is inserted into limit hole locking, the above structure has realized the accurate positioning of different specifications cutting edge, firm clamping and angle adjustment, improve welding quality and efficiency, reduce cost.

This utility model relates to the field of mobile shelving technology and discloses a mobile shelving buffer device, including a fixed frame, the fixed frame including a frame body and a turntable, the turntable being installed on the outer side of the frame body, and a buffer structure including a groove, a buffer plate, and a protective pad. The right wall of the frame body has a groove, the inner side of the groove has a buffer plate, the outer wall of the buffer plate has a protective pad, and the left wall of the buffer plate has multiple connecting columns. The connecting columns pass through the fixed groove and are connected to a sliding plate. The sliding plate is located inside a storage slot, and the storage slot is located inside the frame body. This utility model avoids direct collisions with hard metal, prevents scratches and deformation of the frame body, and also avoids sharp impact noises that interfere with the office and reading environment. It provides double buffering and prevents spring rebound, thus preventing the frame body from shifting after buffering.

The invention belongs to the field of metal materials, and provides a multi-element hard alloy wear-resisting ball and application of the multi-element hard alloy wear-resisting ball in the heavy industry. Through gradient design of a chromium-rich / molybdenum-rich nano precipitated phase reinforced binding phase, a vanadium carbide and graphite core-shell modified tungsten carbide hard phase, outer-layer low-binding-phase fine grains and inner-core high-binding-phase coarse grains, synergy of high hardness and wear resistance of the outer layer and high toughness and fragmentation resistance of the inner core is realized; the problems that high-hardness wear resistance and low-friction self-lubricating of an existing ball-milling medium are difficult to consider, gradient structure residual stress and interface defect sensitivity are high, and a high-density non-sheath hot isostatic pressing process window is extremely narrow are solved, the wear-resisting ball has the excellent performance that the Vickers hardness HV is 1200-1600, the compressive strength is 4000-6000 MPa, and the density is 14.0-15.3 g / cm < 3 >, and the wear-resisting performance of the wear-resisting ball is greatly improved. The method has wide application value in grinding media of ore ball mills or semi-autogenous mills.

A tool, in particular for soil cultivation, especially an agricultural soil cultivation tool or a construction soil cultivation tool, with a cast base body made of a steel or cast iron material and having a support section (17), wherein one or more wear-protection elements (20, 50.1, 50.2), consisting of hard metal, are supported on the support section (17) by means of a fastening section (24) and are cast to the support section (17), wherein the at least one wear-protection element (20, 50.1, 50.2) is enclosed at least partially on opposite sides by means of side frames (17.1, 17.2, 17.3; 19.2, 19.4) of the cast base body, characterized in that at least one of the side frames (17.1, 17.2, 17.3; 19.2, 19.4) is a recess (18) is / are interrupted, and that the recess (18) extends to a body boundary of the wear protection element (20, 50.1, 50.2) is led.

The utility model discloses hard alloy product processing device of decarburization, belongs to product processing technical field, it includes furnace body, the lower part fixedly connected with the supporting leg of furnace body, the left end rotationally connected with the furnace cover of furnace body, the fixedly connected with vertical board in furnace body, the rotationally connected with baffle no. The utility model discloses through setting up vertical board, baffle no. Baffle no. The cooperation between the processing device through baffle no. Baffle no. And adjusting structure, thereby can separate processing to the inside of furnace body, makes to different batches of product can be in the same processing period and carries out the independent decarburization processing, thereby has improved production efficiency and the accuracy of quality control, and reduced the operation procedure of subsequent.

The invention relates to a tool (1, 3) for machining a brittle material, in particular glass, hard metal, monocrystalline silicon, and / or ceramic, with - an imaginary central axis (5), - a processing end (7), - a clamping end (9) opposite the end of the machining (7), and - a plurality of cutting edges (11), wherein - the majority of cutting edges (11) in the area of ​​the machining end (7) run along an imaginary cutting edge path (13), wherein - each pair of cutting edges (11) of the plurality of cutting edges (11) are spaced apart from each other by a cutting edge interruption (15) at an interruption position along the imaginary cutting edge path (13), wherein - the imagined cutting edge path (13) has a total length (17), wherein - each cutting edge (11) of the plurality of cutting edges (11) has a cutting edge length (19), and wherein - a ratio of the sum of the cutting edge lengths (19) to the total length (17) is less than 1 and - each cutting edge length (19) is shorter than 1.5 mm.

The application discloses a hard alloy product rod-penetrating device, and belongs to the technical field of hard alloy production equipment. The device comprises one or more rod-penetrating units. Each rod-penetrating unit comprises a lower fixing assembly for fixing the lower part of a material rod carrier and keeping the material rod carrier in an up-and-down extending state, and a transfer module for transferring a workpiece to the upper part of the material rod carrier and releasing the workpiece to penetrate the workpiece into the material rod carrier. Each rod-penetrating unit further comprises a holding assembly for holding the workpiece which has been penetrated into the material rod carrier, and a lifting driving assembly for driving the holding assembly to move up and down. The hard alloy product rod-penetrating device has the advantages of being not easy to cause collision damage, high precision and stability of rod-penetrating operation, and the like.

This utility model discloses a cemented carbide material stirring device, including a stirring frame, a connecting rod at the top of the stirring frame, a protective sleeve rotatably fitted on the outside of the connecting rod, a locking sleeve on the outside of the protective sleeve, the inner wall of the locking sleeve being movably connected to the outer wall of the protective sleeve by threads, a control sleeve rotatably fitted on the outside of the locking sleeve, a protective groove on the outside of the connecting rod, a locking frame fixedly fitted on one side of the control sleeve, a locking rod slidably fitted in the locking frame, a locking plate fixedly fitted at one end of the locking rod, a locking spring movably fitted on the outside of the locking rod, multiple movable grooves on the inside of the protective sleeve, a protective frame on the side wall of the movable groove, a protective block slidably fitted in the movable groove, a movable spring connected to one side of the protective block, a movable block at the other end of the movable spring, a movable sleeve on the outside of the protective sleeve, and a locking groove on the outside of the protective sleeve. This utility model realizes flexible adjustment of the overload trigger threshold and ensures the structural stability after the protection threshold is adjusted, ensuring the stable use of the equipment.

The present application relates to the technical field of alloy, in particular to a kind of hard alloy rod based on regenerated tungsten carbide powder and preparation method thereof.The rod is prepared from carbon shell regenerated tungsten carbide powder, cobalt powder, vanadium carbide powder and tricarbide chromium powder by low-energy mixing, dense mixing extrusion, dewaxing sintering and fine grinding.The carbon shell regenerated tungsten carbide powder is obtained by sequentially forming first polydopamine sublayer containing urea, second polydopamine sublayer and resorcinol-formaldehyde resin outer layer on the surface of regenerated tungsten carbide particles, and then pre-pyrolysis by argon.The hierarchical carbon shell is used to compensate the carbon-oxygen fluctuation on the surface of regenerated tungsten carbide particles during sintering process, so that the obtained rod has fine and uniform tungsten carbide grains, lower hardness dispersion, higher transverse breaking strength and lower micro-drill edge collapse rate.

The present application provides a kind of powder-repellent surface and its preparation method and application, the surface is formed with at least one layer of nano corrugated structure, the characteristic size of nano corrugated structure is 1-100 μm;Preferably, surface is sequentially formed from top to bottom with the first structure and the second structure of the non-parallel direction of corrugation, the characteristic size of second structure is less than the characteristic size of first structure, the average depth of first structure is greater than second structure, the characteristic size of second structure is 1-5 μm, surface is hard metal surface.Powder-repellent surface is based on the surface texture technology of pulsed laser to modify the surface morphology of metal / alloy substrate, constructs the surface micro-nano structure of micron-sized gully-like protrusion on substrate, reduces the contact area between powder particle and substrate, thereby reduces the adhesion of powder, by tilting surface, powder adhered on substrate can be naturally dropped off.The scheme can be applied to any product, equipment or processing environment that needs to prevent powder pollution, to achieve the effect of greatly reducing the surface powder adhesion area.

The application belongs to the technical field of hard alloy and particularly relates to a method for reducing sintering deformation of large hard alloy products, which comprises the following steps: S1, obtaining hard alloy mixture, filling the hard alloy mixture into a mold through a blanking net disc for pressing to obtain a pressed compact, the density of the pressed compact gradually increases from the center point to the outermost edge in the horizontal direction; S2, loading the pressed compact into a furnace for sintering to obtain a large hard alloy product. The blanking net disc can change the density difference between the outer part and the center part of the pressed compact in the pressing process, reduce defects such as cracks, and make the shrinkage rate of the outer part during sintering faster, thereby reducing the bottom concave deformation caused by the large volume; two thin groove boats are used to clamp the pressed compact, and a layer of ashless paper is placed between the thin groove boats and the pressed compact, so that the alloy has the same dewaxing condition and heat load during sintering, and the above optimization is performed during the pressing and sintering processes of the hard alloy, so that the sintering deformation of the large hard alloy product is reduced.

The invention discloses a method for preparing a hard alloy cutter with an incomplete covering coating on a core part and a cutting blade. The hard alloy cutter comprises a clamping part and a cutting part, the cutting part comprises a front cutter surface, a rear cutter surface, an auxiliary rear cutter surface, a main cutting edge formed by intersecting the front cutter surface and the rear cutter surface, and an auxiliary cutting edge formed by intersecting the front cutter surface and the auxiliary rear cutter surface; the method for preparing the hard alloy cutter with the incomplete covering coating on the core comprises the following steps that S1, the hard alloy cutter to be coated is placed and then fed into a chemical coating furnace or a physical coating furnace, and a first pre-coating completely covering a cutting part of the hard alloy cutter to be coated is prepared; s2, the first precoating on at least one of the front tool face, the rear tool face and the auxiliary rear tool face of the cutting part is subjected to material removal machining, and a first coating incompletely covering the core part of the hard alloy tool is formed; and S3, the whole to-be-coated hard alloy cutter is fed into a physical coating furnace, and a second coating completely covering the cutting part of the to-be-coated hard alloy cutter is prepared. The method can be used for preparing the hard alloy cutter and the cutting blade which are high in cutting efficiency and long in service life and are provided with the incompletely-covered coating at the core part.

The utility model relates to a hard alloy base body with central concave edge multi-rib, belonging to the technical field of petroleum and geological drilling tools. The upper end face of the base body is provided with a central conical boss, and the arc conical surface on the circumferential outer side is connected and transitioned through an annular convex rib. The arc conical surface is provided with a narrow radial convex rib and a radial wide inclined rib with two wider inclined surfaces and a central arc transition in the radial direction. The two convex ribs are annularly symmetrical, uniformly distributed and arranged at intervals. This structure can limit the load during work to the edge area outside the annular convex rib, the central area is less affected, can effectively block the crack expansion to the center, prevent the whole diamond layer from falling off, and avoid the diameter reduction of the drill bit due to ring abrasion. At the same time, the design of the narrow convex rib and the wide inclined rib improves the stress distribution, improves the bonding strength, and prolongs the service life of the composite sheet. The utility model has flexible and adjustable structure, strong adaptability, can significantly reduce the drill bit failure risk, improve the drilling efficiency, and has significant economic and social benefits.

The utility model discloses a hard alloy tamping pickaxe convenient to use, which belongs to the technical field of tamping pickaxes and comprises a tamping pickaxe body, an annular grip is arranged on the outer side of the tamping pickaxe body, a tamping rod is fixedly mounted at the output end of the tamping pickaxe body, a connecting seat is fixedly mounted at the bottom of the tamping rod, and a mounting rod is movably inserted into the bottom of the connecting seat. A pickaxe is arranged at the bottom of the mounting rod, a hard alloy sheet is arranged on the outer side of the bottom of the pickaxe, two moving plates are slidably mounted in the connecting seat, clamping blocks are fixedly mounted on one sides of the two moving plates, first reset springs are fixedly mounted on one sides of the two moving plates, and moving blocks are slidably mounted in the two moving plates; the time and energy consumed for replacing the pickaxe head are greatly reduced, the maintenance efficiency of the tamping pickaxe is effectively improved, the downtime of equipment is reduced, it is ensured that operation such as railway maintenance can be conducted smoothly, the tamping pickaxe is easy to apply to pickaxe heads of different models and specifications, and a user can select and use the tamping pickaxe conveniently.