178 results about "Head surface" patented technology

The invention discloses a steel plate cutting method and device, a medium and equipment, and belongs to the field of cutting. According to the method, three-dimensional coordinates of all points on the surface of the head of a steel plate are generated by obtaining real-time motion parameters of the steel plate and the head distance and angle detected by a millimeter-wave radar and combining a preset coordinate conversion model. And then, converting the three-dimensional coordinates into a steel plate head shape image by using a morphological reconstruction model constructed based on preset three-dimensional point cloud data and morphological feature extraction rules. According to the steel plate cutting method and device, accurate positioning and efficient cutting are achieved, the production efficiency and the material utilization rate are improved, and the problem that the steel plate cannot be accurately cut in the prior art is effectively solved.

The embodiment of the invention provides a rotor compressor pump body assembly, a rotor compressor and air conditioning equipment, the rotor compressor pump body assembly comprises an air cylinder, the inner wall surface of the air cylinder is arc-shaped, and a plurality of grooves are formed in the inner wall surface of the air cylinder in the circumferential direction; the outer wall face of the roller is in an arc shape, the roller is arranged in the air cylinder, and the outer wall face of the roller is connected with the inner wall face of the air cylinder; the sliding piece is located between the roller and the air cylinder, the head face of the sliding piece is in an arc shape, the head face of the sliding piece abuts against the roller, and the sliding piece and the roller are used for dividing the air cylinder into at least two cavities; the head face of the sliding piece, the inner wall face of the air cylinder and the arc of the outer wall face of the roller are matched with one another. According to the embodiment of the invention, the abrasion of the compressor pump body and the noise can be reduced.

The utility model belongs to the technical field of drilling devices, and particularly relates to a drilling device capable of reducing residual chippings, which comprises an equipment base, an equipment support rod and a drilling main body, the upper surface of the equipment base is connected with the equipment support rod, the drilling main body is arranged at the top of the equipment support rod, and the surface of the equipment support rod is sleeved with a movable sleeve. A transverse plate is arranged on the side surface of the movable sleeve, a cross-shaped sliding frame is installed on the upper surface of the cross plate, and a fixing base is installed on the upper surface of the cross-shaped sliding frame. The surface of a drill bit of the drilling body is sleeved with a protection barrel, the side surface of the protection barrel is connected with a side lug, and a guide rod penetrates through the side lug. When the drill bit of the drilling main body drills a workpiece, the protective barrel is driven to move to the surface of the workpiece, then the drill bit moves downwards to drill the workpiece and generate chippings, and at the moment, the drilling main body drives the guide rod to slide in the side lug and compress the spring strip; when the negative pressure device operates, suction force can be generated to suck out chippings on the inner side of the protection barrel, and therefore chipping residues are reduced.

A boring head arranged for holding a boring tool for metal cutting includes a main body having a support surface and a scale surface. The boring head further includes a piston including a boring tool interface for fixedly carrying the boring tool. The piston is movably arranged in the main body along the positioning axis (y), and a micrometer screw. The micrometer screw is arranged in the main body and coupled to the piston, such that, when the micrometer screw is rotated, the piston is moved along the positioning axis to one of the protracted positions or the retracted position. The micrometer screw has a head abutting against the support surface. The head includes a radially outer head surface provided with first graduation marks. The scale surface is provided with second graduation marks aligned with the first graduation marks to provide a reading of the axial position of the piston.

The invention belongs to the technical field of grinding control, and particularly discloses a high-speed rail head surface coating robot self-adaptive grinding and polishing machining method and system. Comprising the following steps: reconstructing an actual three-dimensional model according to a three-dimensional theoretical model of a high-speed train head and three-dimensional shape data obtained by measurement; on the basis of comparison of the actual three-dimensional model and the theoretical three-dimensional model, obtaining a distribution topological graph of putty coating material removal allowance on the surfaces of different parts; constructing a contact force physical model of the robot tail end grinding disc and the high-speed rail head workpiece; according to the distribution of the removed margins and the size and shape of the high-speed train head, robot grinding and polishing machining areas are divided, and an active-disturbance-rejection fuzzy variable resistance control method is adopted to achieve local area constant force grinding accurate control; and a high-speed rail head putty material accurate removal model is established, and robot grinding and polishing process parameters of corresponding parts are reversely obtained based on the surface putty coating material removal allowance of different parts. The overall efficiency and quality of processing of the putty coating on the surface of the high-speed train head are remarkably improved.

The utility model discloses a workpiece positioning mechanism of a low-speed wire cutting machine tool, which comprises an L-shaped positioning plate fixedly mounted on the machine tool, an L-shaped positioning rod is fixedly mounted on the opposite surface of the positioning plate, and a workpiece placed on the machine tool is clamped between the positioning plate and the positioning rod. A T-shaped limiting clamp connected to the edge of the top of the workpiece in a clamped mode is arranged above the positioning plate, a protruding block is arranged on the side, away from the workpiece, of the upper surface of the limiting clamp, an adjusting bolt is horizontally installed on the protruding block in a threaded mode, and a clamping block movably connected to the surface of the head of the bolt in a sleeving mode is rotationally connected to the side, corresponding to the workpiece, of the adjusting bolt. The limiting clamps are arranged, the workpiece is prevented from vertically shaking, the adjusting bolts and the clamping blocks are arranged on the limiting clamps, the adjusting bolts pull the clamping blocks to pull the first bolts, the limiting clamps vertically extrude and are clamped to the side face of the top of the workpiece in the reverse direction, the upper end of the workpiece is fixed from multiple angles through the multiple sets of limiting clamps, and therefore the stability of the upper end of the workpiece is improved, and the cutting precision is improved.

The utility model belongs to the technical field of reduction furnace chassis cleaning, and particularly relates to a chassis junction silicon cleaning tool which comprises a supporting cover, handles are fixedly connected to the front side and the rear side of the supporting cover respectively, a rotating pipe is installed on the inner wall of the supporting cover through a bearing, and a spray pipe is fixedly connected to the lower side of a cross pipe of the rotating pipe. And the cross pipe of the rotating pipe and the supporting cover are jointly provided with a guide mechanism. According to the scheme, through the arrangement of the air supercharger, the spray pipe and other structures, air can be sprayed in a pressurized mode, under the action of the second belt wheel, the servo motor and other structures, the spray pipe can rotationally spray high-pressure air, then silicon attached to the surface of an electrode tip of the reduction furnace chassis is efficiently cleaned, and under the action of a negative pressure dust collector, the cleaning efficiency is improved. And silica fume and the like can be absorbed and treated in time, and the rotating pipe can be rotationally guided under the action of a guide ring groove, a guide ball and the like, so that stable rotation of components such as a spray pipe and the like is ensured.

The utility model discloses a golf club head surface spraying clamping device which comprises a balance seat, a guide rod, a first electric cylinder body and a driving assembly, the balance seat is fixedly connected with a vertically extending lining plate, the guide rod is horizontally arranged on the lining plate, the guide rod is provided with a through cavity, the front end of the guide rod is connected with a rubber ring, and the first electric cylinder body is connected with the rubber ring. The rubber ring extends into the through cavity and forms an annular space with the inner wall of the through cavity, a plurality of clamping strips are arranged on the side, away from the annular space, of the rubber ring, the first electric cylinder body is installed on the lining plate, a movable rod of the first electric cylinder body extends to the through cavity and is rotationally connected with a movable block, a push block is arranged on the movable block, and the push block can enter the annular space to push the rubber ring to move inwards. The driving assembly is used for driving the guide rod to rotate; in the spraying process, manpower is not needed to move around the golf ball head, the spraying efficiency is high, the golf ball head is not clamped and fixed under the gravity effect and slides into the material receiving box along the rubber plate to be collected and stored, and the situation that another golf ball head is placed after the golf ball head is sprayed manually is not needed.

The present application relates to pet food processing technical field, disclose a kind of for pet food extrusion cutting device, including processing box, conveying roller and cutter, processing box inside rotationally connected with auger, and one end of processing box surface is provided with extrusion head, and processing box is connected with the inside of extrusion head, and two support plates are horizontally fixedly connected in one end of extrusion head surface, two conveying rollers are all arranged between two support plates, and two support plates are equipped with the adjusting mechanism for adjusting two moving boxes inside;Two cutters are provided, and two cutters are respectively slidingly connected to the surface of two moving boxes, and the sliding mechanism for sliding two cutters is arranged in the inside of two moving boxes.The present application is set by two conveying rollers, can be guided after pet food, simultaneously also drive two cutters to mutually close sliding, and cutting will be carried out in a certain length, can improve the convenience of the device use, by replacing two second gears of different size, can make cutting length change.

The utility model relates to the field of medical instrument maintenance, in particular to a special instrument for medical instrument maintenance, which comprises a maintenance hammer main body, a hammer handle mounted at the other end of the maintenance hammer main body, a rubber anti-skid layer mounted on the surface of the hammer handle, a turning cover mounted on one side of the rubber anti-skid layer, a handle mounted on the surface of the turning cover, and a storage tank mounted on the inner side of the turning cover. A first rubber sleeve is installed on the inner side of the storage groove, and a second rubber sleeve is installed on one side of the first rubber sleeve. The maintenance hammer is provided with the storage groove which can store the slender installed hammer head, the hammer head connecting block can be used for installing hammer heads with different radiuses according to different conditions, meanwhile, the slender installed hammer head can be connected to the bottom end of the second hammer head in a threaded mode for use under special conditions, and the practicability of the device is greatly improved; two hammer head surfaces capable of being sleeved with different radiuses are arranged in the maintenance hammer storage groove, medical instruments are maintained and protected, the instruments are prevented from being damaged, and the protectiveness of the device is greatly improved.

An inkjet head includes a nozzle which ejects an ink and includes an inner wall through which the ink passes, a head surface which exposes the nozzle and is connected to first end of the inner wall and an ink supply unit which supplies the ink to the nozzle and includes a flow path connected to a second end of the inner wall opposite to the first end, and the head surface, the inner wall, and the flow path are coated with different coating films, respectively.

The utility model discloses a device for grinding the surface of a cone head of a prefilled syringe barrel, comprising a workbench, a conveying mechanism is arranged on the workbench, a driving wheel mechanism and a grinding mechanism are correspondingly arranged on both sides along the conveying direction of the conveying mechanism, an installation position is reserved on the workbench, a lifting mechanism passes through the installation position from under the workbench and then cooperates with the conveying mechanism, and is located between the driving wheel mechanism and the grinding mechanism, so that not only can the cone head have a uniform rough surface, but also a smaller diamond grinding wheel is used, which is wear-resistant and dust-reduced, and the grinding mechanism can be adjusted in angle, and the grinding wheel is well fitted with the taper of the cone head of the prefilled syringe barrel, so that the grinding surface is sufficiently uniform, thereby improving the quality of the prefilled syringe.

A rail comprises a predetermined chemical composition. In a hardness distribution in a region from a rail head surface to a depth of 16.0 mm, a part having higher hardness than V1 that is minimum hardness in a first internal region is present in a second internal region, and hardness of the rail head surface is HBW 400 to 520 and average hardness in the region from the rail head surface to the depth of 16.0 mm is HBW 350 or more.

The utility model relates to the technical field of water quality monitoring, and discloses an intelligent water quality monitoring sensor which comprises a shell, a supporting column is fixedly connected to the top of the shell, a device body is fixedly connected to the bottom of the supporting column, and an auxiliary shaft is rotationally connected to the outer portion of the device body. The top of the auxiliary shaft is detachably connected with a driving assembly providing rotating force, the power end of the driving assembly is fixedly connected with a gear, the bottom of the gear is fixedly connected with a main push rod, and the bottom of the main push rod is fixedly connected with a cleaning assembly providing cleaning and protection. According to the detection head cleaning device, the motor is started and drives the gear to rotate, due to the existence of the circular chain, the gear rotates around the circular chain so as to drive the main push rod to rotate, the main push rod pulls the cleaning assembly to clean the detection head, and the scraping plate scrapes impurities at the bottom of the detection head in the process, so that the surface of the detection head is ensured to be clean; and the requirement of manual maintenance is reduced.

Provided is a rail that has excellent wear resistance and damage resistance. In a rail (1) according to the present embodiment: the metal structure of a head surface portion (10A) from a head portion outer surface (10S) to a depth of 20 mm is composed of pearlite; the Vickers hardness is 400 HV or more; the hardness H1 at a depth of 1 mm, the hardness H10 at a depth of 10 mm, and the hardness H20 at a depth of 20 mm from the head portion outer surface (10S) satisfy formula (1); and a hardness gradient S1 of a first head surface portion region (10A1) is 2.00 to 10.00 HV / mm, a hardness gradient S2 of a second head surface portion region (10A2) is 0.25 to 2.50 HV / mm, and a hardness gradient S3 of a third head surface portion region from a depth of 20 mm to a depth of 40 mm is 1.00 to 4.00 HV / mm, wherein the hardness gradient S1 of the first head surface portion region and the hardness gradient S2 of the second head surface portion region satisfy formula (2).　(1): H1 > H10 > H20 (2): S2 ≤ 0.95S1

The invention discloses an assembly type foundation pit beam section splicing joint structure with square beam ends and an installation method, the assembly type foundation pit beam section splicing joint structure comprises two beam sections with the square beam ends, joint bar holes or insert key holes are formed in the end head faces of the beam sections, and the two beam sections are spliced into a whole with a splicing seam in the mode that joint bars are inserted into the joint bar holes or connecting keys are inserted into the insert key holes; a seam-crossing buckling frame is arranged on the periphery of the periphery of the splicing seam, the seam-crossing buckling frame is of a square frame structure formed by sleeving a small frame with a large frame, the large frame comprises a transverse screw rod, a transverse nut and a longitudinal clamping plate which are assembled together, and the small frame comprises a longitudinal screw rod, a longitudinal nut, a clamping plate, a connecting rod and a set screw which are assembled together; the number of the clamping plates is four, and the inner corners of the clamping plates are tightly buckled with the four corners of the beam ends on the two sides of the splicing seam respectively. Damage to the beam section caused by punching can be reduced, the service life can be prolonged, splicing is convenient, and dismounting and recycling are convenient.

The invention provides an electric elephant toy, and aims to improve the interestingness of the toy through bionic design and an interaction function. The toy comprises a body, a head, a tail and four legs, wherein the head, the tail and the legs are all movably mounted on the body. A first driving mechanism is arranged in the body and comprises a first motor and a first gearbox, the gearbox is provided with a walking output shaft, a tail swinging output shaft and a head shaking output shaft, the walking output shaft, the tail swinging output shaft and the head shaking output shaft drive the legs to walk, the tail to swing and the head to shake respectively, and the walking posture of the elephant toy is more vivid. In addition, a face touch sensing element and a forehead touch sensing element are installed on the surface of the head, and a button is further fixedly installed on the body. When a child touches the sensing element or presses the button, the toy can trigger corresponding actions and sounds, and interactivity is enhanced. Through bionic design and an interaction function, the electric elephant toy is more interesting and attractive, and is suitable for entertainment and education of children.

In a welded joint portion of a welded rail according to the present invention, when, on a welded surface, a distance from a central axis of a column portion to a tip of a foot is defined as T, a size of a heat affected zone is defined as W, a position at a center of the welded portion in a width direction and at intermediate point between a head surface of a head portion and a foot rear surface of the foot portion and at a surface of a column portion is defined as a first position, a center of a foot rear surface is defined as a second position, a position separated by T / 10 from the tip of the foot on the foot rear surface is defined as a third position, and a position separated by T / 3 from the central axis of the column portion on the foot surface is defined as a fourth position: the residual stress in a height direction measured at the first position is 543 - 6.25 × W (MPa) or less; the residual stress in a longitudinal direction measured at the second position is - 200 to - 20 (MPa); the residual stress in a longitudinal direction measured at the third position is - 350 to - 100 (MPa); and the residual stress in a longitudinal direction measured at the fourth position is 0 to -200 (MPa).

The utility model relates to a kind of evaporators of high-efficiency gas-liquid separation, a kind of evaporators of high-efficiency gas-liquid separation, including first cylinder and the first head connected in the bottom of the first cylinder, the evaporator further includes second head, the second head is covered in the first head portion and with the first head forms first cavity, in the second head surface also be provided with the first steam inlet of first cavity.This embodiment's high-efficiency gas-liquid separation evaporator is heated twice by using first cavity design, that is, by the first head and second head form first cavity, by setting first steam inlet in first cavity, the problem of insufficient heating efficiency of traditional single stage is solved, so that the material not fully separated obtains supplemental heat energy, fully separates again, improves production efficiency and precision.

The utility model discloses a positioning device for butt joint of water supply pipelines of a water conservancy project, and belongs to the technical field of water conservancy project pipeline installation. Comprising a main guide rod, two bearing head positioning arc plates are arranged at the lower end of one side of the main guide rod, and a plug guide arc plate is slidably arranged at the lower end of the other side of the main guide rod. The positioning device is scientific and reasonable in design, when pipelines are in butt joint, the two bearing head positioning arc plates are arranged on the outer wall of the pipeline bearing head, the two bearing head positioning arc plates have the linear positioning effect on the main guide rod, the pipeline plug part is made to be close to the bearing head, the plug guide arc plate on the front side is made to be attached to the surface of the plug part, and therefore the pipeline is in butt joint. The plug part drives the plug guide arc plate to slide backwards on the main guide rod, so that butt joint of pipelines can be achieved easily, the device is lifted after butt joint, butt joint of a next section of pipeline can be conducted, operation is convenient and fast, the pipeline butt joint efficiency is effectively improved, and the hydraulic engineering operation efficiency is improved.

The utility model discloses a pressure adjustable's golf head surface polishing jig, including base and be used for clamping golf head's fixed base, install from outside to inside on the base by the first spring group provides the first support subassembly of the thrust, by the second spring group provides the second support subassembly of the thrust and by the third spring group provides the third support subassembly of the thrust, still install fixed plate on the base, and the fixed base is fixed on the fixed plate, and the second support subassembly, third support subassembly are promoted to ascend or are retreated and make the second support subassembly, third support subassembly drop through the push rod advance, let the spring of different quantity provide different thrust for fixed plate and fixed base to the switching of rough polishing, fine polishing and other processes, and when the polishing pressure is too big, the spring compression makes the golf head drop down, thereby avoiding the intensity of polishing to be too big, resulting in the product appearance to be seriously abraded.

The utility model relates to the technical field of artificial hip joint prostheses, in particular to a hip joint femoral stem hollow conical head. Comprising a cone head surface (1), a cone side surface (2), a cone inner cavity (3) and a powder cleaning channel (5) which are connected in sequence, the conical head face (1) is used for sealing the in-conical cavity (3), the conical side face (2) is matched with a ceramic ball head or a metal ball head, the conical side face (2) is provided with a plurality of small protrusions (4) so that the femoral stem conical head can be matched with the ceramic ball head or the metal ball head more tightly, and the in-conical cavity (3) is used for increasing elastic deformation of the conical head. The small bulges (4) generate plastic deformation when the ceramic ball head or the metal ball head is assembled with the conical head, so that the contact area between the ball head and the conical head is increased, and the friction force is increased; and the powder cleaning channel (5) is used for cleaning unmelted powder in the cavity in additive manufacturing.

The utility model belongs to the technical field of sealing head surface cleaning, and particularly relates to a surface cleaning device for edge locking type sealing head production, which comprises a conveying table, a cleaning bin is arranged on the left side of the conveying table, and an edge locking type sealing head is arranged at the top of the conveying table. The end socket can be automatically and accurately conveyed to the cleaning bin from a production line through the conveying assembly, the automatic positioning and clamping functions of the clamping assembly are matched, traditional manual carrying and manual positioning links are completely replaced, meanwhile, the image recognition sensor monitors the cleaning effect in real time and is in linkage with the control system to adjust cleaning parameters, and the cleaning efficiency is improved. Stable cleaning quality is ensured, the labor cost and the labor intensity are remarkably reduced, the cleaning efficiency and the production continuity are greatly improved, the clamping assembly can automatically drive the mounting box to rotate through the synergistic effect of the rotating air cylinder and the driving motor, and the end socket is driven to turn over to the preset angle; the brush head and the spray head driven by the first lifting air cylinder are matched to achieve multi-angle cleaning, and full-automatic cleaning of the two faces of the end socket is achieved.

The utility model discloses a novel ultrasonic welding device, include: negative electrode welding head, the negative electrode welding head below is equipped with negative electrode welding seat, be equipped with three welding head surfaces on the negative electrode welding head, be welding head A surface, welding head B surface and welding head C surface respectively. The utility model discloses through to the optimization of welding head structure, under the premise of not changing the size of the weld mark, not only can guarantee that welding remains is sufficient, satisfies the demand of the big current charge -discharge of electric core, and greatly prolongs the service life of negative electrode welding head and negative electrode welding seat, reduces the equipment welding head replacement time, improves the equipment production efficiency, reduces the equipment maintenance cost.

Buffer structure for an oversized hydraulic hammer, comprising a pile cap, a striking adapter, and a hydraulic hammer; wherein the pile cap comprises a sleeve mounted on the apex of the pile foundation, a head ring plate connected to the apex of the sleeve, and a round-plate-shaped head plate connected to the inner end of the head ring plate; wherein a stop ring is attached centrally to the inner wall of the sleeve of the pile cap; wherein the striking adapter is mounted inside the pile cap and comprises a striking adapter ring and a striking adapter body; wherein the axial cross-sectional profile of the striking adapter ring is L-shaped and comprises a lower ring section and an upper cylinder section connected to the head surface of the lower ring section; wherein the striking adapter ring is mounted on the stop ring in the sleeve of the pile cap;wherein the impact adapter body is a round, plate-shaped body adapted to the upper interior of the pile cap, wherein the impact adapter body is mounted between the head plate of the pile cap and the lower ring section of the impact adapter ring; characterized in that the buffer structure further comprises several buffer cylinders, recoil pads and several buffer rings; ; wherein the center of the head plate of the pile cap extends coaxially upwards and forms a damping cylinder with a head flange; wherein several buffer cylinders are each mounted correspondingly in several through bores evenly distributed around the circumference of the head ring plate of the pile cap, wherein the lower end face of the piston rods of several buffer cylinders rests against the head face of the impact adapter ring of the impact adapter; wherein the recoil pad is mounted at the lower end of the damping cylinder of the pile cap, wherein the lower end face of the recoil pad rests against the defined head face of the impact adapter body; wherein several buffer rings are arranged one above the other in the damping cylinder of the pile cap and are located between the backstop pad and the head flange of the damping cylinder; wherein the hydraulic hammer comprises a hammer housing and a hammer core; wherein the hammer housing is connected to the head flange of the pile cap damping cylinder by means of a bottom flange; wherein the hammer core is arranged inside the hammer housing and is inserted into several buffer rings and recoil pads of the pile cap damping cylinder, wherein the lower end face of the hammer core rests on the head face of the impact adapter body.

The utility model relates to ultrasonic cleaning auxiliary equipment technical field especially a kind of wall planing machine cutter head surface treatment auxiliary device, including support frame, at least two groups of parallelly arranged rod body assembly, interval arrangement between adjacent rod body assembly, the sliding connection of rod body assembly with support frame, and sliding direction is perpendicular with the length direction of rod body assembly, define adjacent two rod body assembly as first rod piece, second rod piece, when sleeving cutter head, cutter head at least part on first rod piece is sleeved in the length direction of rod body assembly at least part of cutter head on second rod piece abuts. Utilize the axial misalignment relationship between cutter head on adjacent rod piece, make cutter head on every rod body assembly automatically obtain separation interval, avoid the tedious operation brought by traditional artificial individual movement and adjustment cutter head interval, greatly improve the arrangement efficiency of cutter head pre-washing link, and device structure is simple and low in cost.

The utility model relates to a cold extrusion forming die for a flow drill screw, which comprises a die component A, a die component B and a die component C which correspond to a process step sequence, and mainly aims at extruding and forming a bar material sequentially through the die component A, the die component B and the die component C. The die component A extrudes the bar material into a blank; a primary stud part and a primary nut part of the screw are formed through the cylindrical groove and the circular truncated cone groove correspondingly, the nut part of the blank is extruded into a cylindrical structure with a round head face through the die assembly B, the outer diameter of the nut is further widened, the blank is extruded and formed through the forming groove and the nut groove of the die assembly C, and the screw of the large-diameter nut structure is formed. The phenomenon of material shortage caused by overlarge diameter of the nut is avoided, and the quality of the screw is improved.

Dowel for the installation of pressure-sensitive thermal insulation materials on solid wall surfaces with an extra large washer to avoid unwanted compression of the soft thermal insulation material and thus to simultaneously strengthen and effect the steel screw pin arranged in the dowel, which has an Allen profile inserted into its head surface, with a threaded sleeve open at the top mounted on its edge zone, which provides a receptacle for elements that can be screwed on there for the fixing of facade cladding, above the thermal insulation of any type.

Provided is a rail capable of obtaining excellent wear resistance and damage resistance. A rail (1) according to an embodiment of the present invention contains 0.80%-1.20% of C, 0.80%-2.50% of Si, 0.10%-2.00% of Mn, 0.0250% or less of P, and 0.0250% or less of S in terms of mass%, with the balance being Fe and impurities. The metal structure of a head surface part (10A) has a pearlite area ratio of 95% or more and a Vickers hardness of 400 HV or more. In the head surface part (10A), the Si positive segregation degree, which is the ratio of the maximum value of the Si concentration in a Si positive segregation band to the Si concentration in a bulk region, is more than 1.00 to 1.35, and the Si negative segregation degree, which is the ratio of the minimum value of the Si concentration in a Si negative segregation band to the Si concentration in the bulk region, is 0.90 to less than 1.00.

The utility model discloses a cable head insulation paste reinforced cable comprising an outer surface layer, one end of the outer surface layer is fixedly connected with a connecting ring, the inner part of the outer surface layer is fixedly connected with a waterproof layer, the inner part of the waterproof layer is fixedly connected with an insulating layer, and the inner part of the insulating layer is fixedly connected with a flame retardant layer. The side surface of the end is in contact connection with a sliding pipe, the end, away from the end, of the sliding pipe is fixedly connected with a spring, the interior of the end is slidably connected with a pressing rod, and the surface of the end is fixedly connected with a sleeve. Through the components, the sliding pipe is arranged in the flame-retardant layer, movement of the battery cell is limited, the battery cell is prevented from being bent, and the sliding pipe is matched with the spring and the flame-retardant layer, so that a worker can conveniently insert the battery cell into the empty groove of the end socket, and the rotating ring is rotated to be matched with threads on the inner side wall of the rotating ring and the surface of the end socket; and the conical end part of the rotating ring presses the pressing rod to press the battery cell, so that the battery cell is further fastened, the connection stability is ensured, and the disassembly and assembly are convenient.