36results about How to "Achieve a tight fit" patented technology

The invention discloses a processing method of a tool apron with a locking device, belonging to the technical field of tool apron processing. The method comprises the following steps: (1) the preparation of raw materials of the tool apron; (2) the annealing treatment of forging blank, wherein the annealing temperature is 780-840 DEG C, and the annealing time is 4-6 hours; (3) the rough processing of forging blank; (4) the heat treatment of the tool apron: heating to 830 DEG C within 20 minutes, quenching after 45 minutes of heat preservation, wherein a quenching medium is No. 2 quenching oil, and then tempering for two times under the temperature of 450-480 DEG C; and (5) the deep processing of the tool apron: cutting gaps and circular arc segments with a wire cutting method, and blackening the tool apron. In the processing, the locking device is formed, the tool apron can still be firmly locked on a cutter shaft not to loosen when the cutter shaft rotates at a high speed, the requirement that the face runout value of the tool apron is controlled within 0.002 mm is achieved, and the demand that users cut metal plates such as high-precision aluminum plates, stainless steel plates, silicon steel plates and the like is met.

The invention provides a covered stent and a preparation method thereof. The covered stent comprises a stent body and a covered pipe material which sleeves the stent body, wherein the covered pipe material is in a retracted state and is fitted to an outer surface of the stent body; the covered pipe material can be tightly fitted to the surface of the stent without the need of additional sewing and spinning processes and the like; one covered pipe material can be applicable to stents with different specifications, so that the applicability of the covered stent is improved; only one layer of the stent and one layer of the covered pipe material are adopted, so that the outer diameter size of the covered stent is small and the trafficability and smoothness of the covered stent are improved. The invention further provides the preparation method of the covered stent; the stent body, which is sleeved with the covered pipe material, is put into a medium with pre-set temperature, and the covered pipe material is retracted and fitted to the outer surface of the stent body, so that the covered stent can be prepared before surgeries; multi-specification goods preparation is not needed, and the cost of clinical goods preparation is low.

The invention discloses an anti-slip optical fiber coupler capable of being accurately positioned and installed, which comprises a coupler body, a fixed box, a belt wheel mechanism, an optical fiber head and an optical fiber cable. A resistance pad is pasted on one side of the coupler body. A movable block is movably installed on the inner side of a through groove, and a fixed rod is fixed on the side surface of the movable block. The side face of a guide block is connected with a fixed box through a limiting rod. Protection boxes are fixed to the two ends of the coupler body. A connecting rod is movably arranged in an installation hole. An installation cylinder penetrates through the protection boxes. A movable groove is formed in the position, on the outer side of a movable rod, of the installation cylinder. A movable shaft is sleeved with the belt wheel mechanism. The anti-slip optical fiber coupler capable of being accurately positioned and installed is provided with a structure for locking the optical fiber cable and the coupler, the optical fiber cable can be prevented from being separated from the coupler when being pulled, and a reserved line is arranged after the optical fiber cable is connected, so that subsequent maintenance operation is facilitated.

The invention belongs to the technical field of coal mining and particularly relates to a hole collapse prevention supporting device and method for an unstable drill hole of a soft coal bed. The device comprises a plurality of supporting units. Each supporting unit comprises a protection mechanism arranged in the drill hole and a supporting mechanism used for supporting the protection mechanism. Each protection mechanism comprises an upper supporting plate, a lower supporting plate and a plurality of composite supporting columns, wherein the upper supporting plate and the lower supporting plate are arranged symmetrically, and the composite supporting columns are arranged between the upper supporting plate and the lower supporting plate. Each supporting mechanism comprises a plurality of flexible air bags which communicate through an air introducing pipeline. The using method of the device comprises the five steps of connecting the supporting mechanisms, connecting the protection mechanisms, pushing the device into the drill hole, connecting an air pipe and introducing air and disassembling the air pipe. According to the hole collapse prevention supporting device and method for theunstable drill hole of the soft coal bed, the flexible air bags are arranged between the upper supporting plates and the lower supporting plates, the upper supporting plates and the lower supporting plates are separated by introducing air into the flexible air bags and are supported through the composite supporting columns, and the device is easy to transfer, good in supporting effect and convenient to use and popularize.

The invention discloses an anti-blocking scriber for a test field. The anti-blocking scriber comprises an ash bucket and upright rods, wherein totally two upright rods are arranged; an ash outlet is formed in the bottom end of the ash bucket; the ash bucket is connected with the upright rods by virtue of a reciprocating mechanism; an anti-blocking mechanism is arranged on the ash bucket and comprises a digging rope; one end of the digging rope is connected with the reciprocating mechanism; the other end of the digging rope penetrates through the inner cavity of the ash bucket so as to extend to the ash outlet and is connected with an ejector; the ejector is matched with the ash outlet; the ejector comprises a tip; a striking rod is connected onto the digging rope; a first connecting rod ishinged onto the striking rod; and the first connecting rod is connected with the outer wall of the ash bucket. By virtue of dual actions of ejecting and shaking, blanking normality is ensured, the operation is convenient and rapid, and time and labor can be saved. Meanwhile, the operation of opening and closing the ash outlet at an optional position is realized in the scribing process, the scriber is multifunctional, and the working efficiency is improved.

The invention belongs to the technical field of packaging equipment, in particular to a motherboard encapsulation device with a dust removing function for computer hardware development, aiming at thetechnical problem that dust is easily encapsulated in the encapsulation film when encapsulating, the following programs are proposed, the device includes an encapsulated case, the bottom inner wall ofthe packaging box body is fixed with a lower packaging mold by screws, and the top of the lower packaging mold is provided with a packaging groove, the inner wall of the packaging groove is fixed with a packaging table by screws, the outer wall of the bottom inner wall of the packaging table is provided with air holes distributed at equal distances, the outer wall of the top of the packaging table is provided with a main board, and the outer wall of the top of the main board is provided with a packaging film. The electric expansion rod drives the sliding plate to move downward to seal the main board, and the booster pressurizes, thereby facilitating the close bonding of the encapsulation film and the main board and facilitating the encapsulation work.

The invention belongs to the field of road construction and discloses a novel multifunctional viaduct sound insulation device and method. A sound insulation board is arranged; a fixing frame is weldedto the portion, below the back side of the sound insulation board, of the front side of the sound insulation plate, and tightening bolts are in threaded connection with the fixing frame; the fixing frame is provided with a first retractable rod and a second retractable rod, an outer barrel of each retractable rod is provided with through holes, the inner rod of each retractable rod is provided with a groove, and a spring is welded to each groove; the springs are welded to protrusive blocks, and the protrusive blocks are inserted into the through holes. The front side of the sound insulation board is provided with sound absorption holes, and the portion between the front side of the sound insulation board and the back side of the sound insulation board is filled with a glass sponge. According to the device and the method, by arranging the first retractable rod and the second retractable rod, the fitting degree with side plates of a bridge can be improved, the fixation firmness of the sound insulation board is enhanced, and the situation is avoided that since a traditional viaduct sound insulation device is fixed, there is a gap between the traditional viaduct sound insulation device and a viaduct, correspondingly a sound insulation board shakes under severe weather, the sound insulation effect declines, and meanwhile, a certain danger exists.

The invention discloses an ear-hanging type mask capable of preventing ear roots from being tightened. The mask comprises a mask body, ear hanging ropes, a mouth ventilation cover and a nose ventilation cover. Two sections of ear hanging ropes are arranged at each side end of the mask body; the two sections of ear hanging ropes are connected through a connecting piece; the connecting piece comprises an outer shell, a flexible soft cushion, an arc-shaped extending piece, a via hole and a rotating shaft. The ends, away from the mask body, of the ear hanging ropes are fixed to the rotating shaft,a groove is formed in the side wall of the rotating shaft, an inserting rod is arranged in the via hole, a first fixing block and a second fixing block are further arranged in the via hole, a baffleis fixedly installed on the inserting rod, and a jacking spring is arranged between the baffle and the first fixing block. Winding or loosening of the ear hanging ropes is achieved by rotating the rotating shaft, the ear hanging ropes can be adjusted according to the actual situation of a user, tight attachment of the connecting pieces and the rear roots of the ears of the user is achieved, the stability of the mask body is guaranteed, the user can feel more comfortable, and tying injuries caused by tightening of the ear hanging ropes are avoided.

The invention provides a supporting device for a water conservancy pipeline. The supporting device for the water conservancy pipeline comprises a base, two movable supporting arms, a reinforcing partand a rotating part, wherein an accommodating cavity is formed inside the base; the rotating part is arranged inside the accommodating cavity, and the two movable supporting arms are symmetrically arranged on the two sides of the top of the base; the reinforcing part and the two movable supporting arms are combined to form a through groove used for accommodating the water conservancy pipeline; rotating blocks are arranged on the two sides of the water conservancy pipeline, and each rotating block is abutted against the corresponding movable supporting arm; the rotating part comprises a rotating shaft, transmission chains, a worm and a driving motor; one end of the rotating shaft is provided with driven gears, and the other end of the rotating shaft is provided with a driving gear; the opening end parts of the transmission chains are fixedly connected with corresponding rotating blocks of the transmission chains, and the transmission chains mesh with the driven gears; the worm is rotatably arranged inside the accommodating cavity and meshes with the driving gear; and the driving motor can drive the worm to rotate. According to the device, the water conservancy pipeline is rotationally adjusted through the rotating part, so that the joint is matched, and the assembling efficiency and the mounting stability are improved.

The invention relates to the technical field of pipe manufacturing equipment, and discloses a forming die structure of a double-wall corrugated pipe. The forming die structure comprises a die, a mounting plate is integrally formed on the side face of the die, and convex matching keys are integrally formed at the upper end and the lower end of a die matching face in an extending mode. According tothe forming die structure of the double-wall corrugated pipe, by means of reduced matching pressure, when the die is matched, impact is reduced, the die is matched with a front upper positioning groove, negative pressure generated by a negative pressure motor acts on a first long negative pressure groove, and therefore it is guaranteed that the die is matched and aligned; and in the continuous moving process, when the negative pressure of the first long negative pressure groove reaches a certain degree, a sealing piston is attracted to move upwards, so that the negative pressure at the first long negative pressure groove is transmitted to a second long negative pressure groove, a lower positioning groove is matched with the convex matching key, the negative pressure acts on the second longnegative pressure groove in the lower convex matching key, the upper matching surface and the lower matching surface of the die both receive the negative pressure, and tight matching effect is achieved.

The invention discloses a spiral forming die set for a metal wire. The spiral forming die set for the metal wire comprises a wire releasing mechanism, a wire pulling mechanism, a wire coiling mechanism and an axis moving mechanism, wherein a first connecting plate is arranged at the front side of a wire releasing support, and wire pressing shafts are arranged at intervals at the upper part of thefirst connecting plate; a wire guide shaft and a first clamping claw cylinder are arranged at the front side of the first connecting plate; the wire pulling mechanism comprises a wire pulling base, awire pulling cylinder and a second clamping claw cylinder; the axis moving mechanism comprises a first motor, a lower bottom plate, a moving die set and an upper connecting plate; the wire coiling mechanism comprises a wire coiling base, a second motor and a vertical wire coiling plate; a gearwheel and a pinion which are engaged with each other are arranged on the vertical wire coiling plate; andthe outer end of the wire guide shaft of the wire releasing mechanism penetrates the center of the gearwheel of the wire coiling mechanism and is close to a wire coiling head. With the adoption of thespiral forming die set for the metal wire, lubricating oil is not refilled during processing, and moreover, the spiral inside diameter of the metal wire is less than the outside diameter of an asbestos wire, so that the metal wire and the asbestos wire can be closely clung to each other; and the spiral forming die set for the metal wire has the advantages of being high in processing accuracy, andconvenient to adjust the outside diameter and the pitch.

The invention provides a flat wire continuously-wound linear coil and an inductor. The flat wire continuously-wound linear coil comprises a coil A and a coil B. The winding directions of the coil A and the coil B are opposite, and the coil A and the coil B are formed by winding the same flat wire. The flat wire is of a quadrangular structure, the cross section of the flat wire is rectangular, andchamfers are arranged on the four edges of the flat wire respectively, so that the cross section of the flat wire is of an octagonal structure. The chamfers provide a space for pressing deformation ofthe flat wire, so that the thickness of the inner side of the bent part of the flat wire after deformation does not exceed the thickness of the flat wire, two adjacent single-coil coils can be tightly attached together, and a gap between the two adjacent single-coil coils is eliminated. When the iron core is installed in the coil, injection molding can be directly conducted between the coil and the iron core, gaps in the coil do not need to be filled with chemical reagents any more, the process of coating the interior of the coil with the chemical reagents is omitted, cost is saved, and meanwhile use of polluting chemical reagents is reduced.

The invention discloses a combined heat tracing tape, which comprises a body. The body is provided with a plurality of fixation units. The plurality of fixation units are distributed along the lengthdirection of the body in sequence. Each fixation unit comprises a mobile block, wherein the mobile block is in slide connection with the body. Each mobile block is provided with a first clamp member and a first clamp connection member matched with the first clamp member. The combined heat tracing tape is convenient to use and good in heat tracing effect.

The invention discloses a welding method and a chip packaging method, which are suitable for semiconductor packaging. The welding method comprises the steps: carrying out oxidation treatment on a to-be-welded component and a welding part, and enabling the surface of the to-be-welded component and the surface of the welding part to form a metal oxide layer; and in an atmosphere containing reducing gas, welding the to-be-welded component and the welding part through reflow soldering, so that the to-be-welded component and the welding part are tightly combined. According to the welding method, the oxide on the surfaces of the to-be-welded component and the welding part is subjected to the reduction reaction in the heating process by using the reducing gas, so that reliable welding of the metal heat dissipation layer is guaranteed, and the problem that the yield of chips is low due to the fact that resin scaling powder is used in the prior art is effectively solved.

The invention discloses a medical auxiliary bed, which comprises various bed boards, the bed boards are connected by hinges and hinges with locking devices, each bed board is provided with a lower bed cover, and the lower bed cover wraps the central processing from bottom to top. board, leak-proof bag, water bag, and upper bed cover. There are water storage bags under each of the bed boards. The water bags are connected to the water storage bags through conduits. Both ends of the conduits are equipped with water pumps. The central processing board The temperature of the water bag and the angles of the hinges and hinges can be controlled. The buttocks bed board among the bed boards is located in the guide rail, and the two ends of the guide rail are fixed with the head and the tail of the bed. The medical auxiliary bed has a simple structure and an ingenious design, which effectively improves the comfort of the medical auxiliary bed in use.

The invention relates to the technical field of water conservancy projects, and discloses a water conservancy sluice opening and closing cleaning device which comprises a base, dam bodies are fixedly connected to the left side and the right side of the top end of the base, a sluice is slidably connected between the two dam bodies, and rolling wheels are rotatably connected to the left side and the right side of the sluice. Four groups of rollers are longitudinally arranged along the left side wall and the right side wall of the water gate at equal intervals, a sliding groove is formed in the inner side wall of each dam body, and each roller is slidably connected to the interior of the corresponding sliding groove. A second electromagnet works to drive a telescopic connecting sleeve to ascend to open the water gate, meanwhile, the second electromagnet and a second permanent magnet are arranged in a matched mode to achieve accurate opening of the water conservancy water gate, the flood discharge efficiency of the water gate is improved, a temperature cleaning environment is provided for follow-up water gate cleaning, and the water conservancy water gate is convenient to use. Meanwhile, accurate detection of different water levels is achieved through cooperative arrangement of the elastic connecting rib and the piezoelectric detection block, and the effect of changing the cleaning gear according to water flow of different water levels is achieved.

The invention discloses a method and equipment for preparing fire-resistant and anti-corrosive C type steel, and belongs to the technical field of anti-corrosive building material. The equipment comprises a bonding hole punching machine, a forming machine and an extrusion cladding machine arranged in sequence from front to back; the equipment is characterized in that an extrusion die is mounted inside a package molding machine, a C type steel inlet is arranged on the front end of the extrusion die, a C type steel outlet is arranged on the rear end of the extrusion die, the C type steel outlet is larger than the C type steel inlet, a cladding chamber connecting the C type steel inlet and the C type steel outlet is arranged inside the extrusion die, a flow pass connecting the cladding chamber is arranged in the side wall of cladding chamber, the other end of the flow pass is communicated with a filling port, and the filling port is connected with a plasticizing extruder. When the C type steel is extruded and cladded, the cladded material in a melted state is extruded to the upper surface and the lower surface of the C type steel through the flow pass, then through being connected by the bonding hole, the complete set of equipment enables the cladding layer to form a whole with multiple connection points, which reinforces the robustness, thereby the lasting anti-corrosive ability of the C type steel is heightened.