294results about How to "Avoid scratch damage" patented technology

The invention discloses an automatic spool replacing device for woolen sweater fabric weaving and belongs to the field of textile and garment machining mechanical devices. An empty spool discharging mechanism and a full spool feeding mechanism are sequentially and vertically arranged on the two sides of the upper side of a reciprocating horizontal movement mechanism in the horizontal direction. Air expansion rotating shafts are horizontally and rotationally connected to yarn conveying bases. The two sides of the lower side of a reciprocating support are symmetrically and rotationally connectedwith two horizontal movement guide wheels correspondingly. The output end of a lifting air cylinder is horizontally and fixedly provided with a spool fetching connection plate. The end of the upper side of a rotational sliding groove is hinged to a rotating support seat. A fixed sliding groove is fixedly arranged on the upper side of a spool holding material frame in the inclined direction. The upper side of a full-spool holding pipe is provided with a full-spool storage hopper in a communicating manner. The lower end of a full-spool falling guide rod is fixedly provided with a full-spool bearing inclined rod. A full-spool pushing connection plate is fixedly arranged at the output end of the full-spool pushing air cylinder. The automatic spool replacing device for woolen sweater fabric weaving is reasonable in structural design and can achieve one-by-one continuous feeding and replacing of the spool after yarn taking-off is completed, the automation degree of spool replacement is improved, and production and use demands are met.

The invention discloses a mechanical dry gas sealing device for pumps. The mechanical dry gas sealing device comprises a movable ring component and a fixed ring component, wherein the movable ring component comprises a spring box (1), a stopper screw (2), a spring (3), a sealing ring (4), a pushing ring (5), a snap spring (6) and a movable ring (7), and the fixed ring component comprises a fixed ring (12), an anti-rotating pin (9), a sealing ring (11) and a gland (8). The mechanical dry gas sealing device is characterized in that the sliding sealing ring (4) is mounted in a seam allowance groove (50) on the inner diameter of the front end of the pushing ring (5), the pushing ring (5) is in close fit with the rear end face (70) of the movable ring (7), and compression rate of the O-shaped sliding sealing ring (4) ranges from 2% to 5%. A sealing end face of the movable ring (7) of a compensation ring is a conical surface. A boss (83) is arranged on the inner diameter of a vertical end face (82) mounting a seam allowance groove (80) of the fixed ring (12) and is matched with the inner diameter of the inner end face of the fixed ring (12) in a support manner. An end face of the compensation ring of the mechanical dry gas sealing device is good in adherence. Besides, the mechanical dry gas sealing device is stable to run, high in interference resistance, good in sealing performance and suitable for diversified working conditions.

The invention discloses an expandable multi-material sprayer system for 3D (Three-Dimensional) printing. The system comprises a base, a plurality of wire feed units and a driving unit, wherein each wire feed unit comprises a connecting rod, a nozzle, a first wire feed wheel, a second wire feed wheel and an electromagnet; one end of each connecting rod is hinged on one side of the base through an installation base; the second wire feed wheels of the wire feed units are installed on the base through one rotary shaft; the first wire feed wheels and the nozzles are installed on the connecting rods; a plurality of electromagnets corresponding to the other ends of the connecting rods are fixedly arranged on the base; the driving unit for driving the rotary shaft to rotate is installed on the base. According to the system disclosed by the invention, on the premise of not adding the quantity of motors, the wire feed units can be expanded according to demand; whether each wire feed unit works or not is randomly controlled; the nozzles on the wire feed units in work are lower than other nozzles in a non-working state in position when the connecting rods swing downward, so that the surface of a part in the process of 3D printing by the nozzles in the non-working state is prevented from being scratched and damaged.

A nondestructive grinding method for the hard and crisp crystal substrate of semiconductor or photoelectric crystal features used of a special abrasive disc prepared from the grinding material chosen from CeO2, SiO2 and barium carbonate and the filler containing activator, oxidant and pH regulator, a finishing disc composed of metallic substrate and electroplated diamond particles, and a deionized water as cooling liquid. Its grinding parameters are also disclosed.

The invention discloses an automatic pipe fitting path distribution conveying mechanism, and belongs to the field of workpiece machining conveying mechanical equipment. A guide pipe mechanism and a path distribution mechanism of the automatic pipe fitting path distribution conveying mechanism are sequentially arranged on one side of a fixed bracket from top to bottom; a distribution pipe materialpipe is obliquely arranged in the position, on the lower side of a guide pipe material pipe, of the fixed bracket; the lower side of the guide pipe material pipe is provided with a bearing pipe baffle; the upper end of a material supplying pipe communicates with the lower end of the guide pipe material pipe; a front path distribution material pipe is vertically arranged in the middle of the lowerside of the material supplying pipe, and a rear path distribution material pipe is vertically arranged at the tail end of the lower side of the material supplying pipe; a material separation mechanismis horizontally arranged on the upper side of the material supplying pipe; and the upper end of the front path distribution material pipe is provided with a rotary baffle, and one side of the lower end of a hook rotary plate located on one side of a reciprocating rotary plate is provided with a hook mechanism. The automatic pipe fitting path distribution conveying mechanism is reasonable in structural design, can stably and efficiently distribute pipe fittings into paths for conveying and can discharge the pipe fittings according to the rear path pipe fitting machining load requirement, the automation degree of pipe fitting path distribution conveying is increased, and the production using requirements are met.

The invention discloses a pipe fitting inside expansion clamping device which comprises a positioning cylinder. The side wall of the positioning cylinder is provided with two sets of through holes, the centers of each set of the through holes are located on the same circumference, the circle center of the circumference is located on the axis line of the positioning cylinder, positioning balls are arranged in the through holes and in clearance fit with the through holes, and the diameter of the positioning balls is larger than the depth of the through holes; two conical tables are arranged in the positioning cylinder and face the same direction, both the big diameter ends of the two conical tables make contact with the inner wall of the positioning cylinder, the two conical tables abut against the positioning balls in the two sets of through holes respectively, a connection rod is arranged between the two conical tables, the small diameter ends, located on the outer sides of the conical tables, of the two conical tables are connected with a pull rod, and the pull rod stretches out of the positioning cylinder. The pipe fitting inside expansion clamping device overcomes the technical defects that a pipe fitting is easy to fracture when an existing pipe fitting clamp clamps the pipe fitting, and the existing pipe fitting clamp cannot finish pipe fitting outer wall machining at a time and achieves the purposes that the pipe fitting is not prone to fracture when the pipe fitting is clamped, and pipe fitting outer wall machining can be finished at a time.

The invention discloses a high-precision horizontal board placing machine, which comprises a PCB feeding mechanism, a packing paper feeding mechanism, a taking mechanism, a conveying mechanism and a positioning mechanism. The PCB feeding mechanism and the packing paper feeding mechanism are both located at the upstream part of the taking mechanism, the taking mechanism is located at the upstream part of the conveying mechanism and the positioning mechanism, and the PCB feeding mechanism, the packing paper feeding mechanism, the taking mechanism, the conveying mechanism and the positioning mechanism are all fixed to a rack; the PCB feeding mechanism and the packing paper feeding mechanism each comprise a transmission belt, a lifting table and a lifting-up driving motor for driving the lifting table to ascend; and the lifting-up driving motor is fixed to the rack, an output shaft of the lifting-up driving motor and a synchronous wheel are sleeved with the transmission belt, and a lifting-up lead screw is fixed to the center of the synchronous wheel and is in threaded connection with the lifting table. According to the high-precision horizontal board placing machine, PCBs and packingpaper are positioned, subsequent board collecting precision is ensured, the automation degree is high, the PCBs are separated by the packing paper, thus the PCBs are prevented from being scraped and damaged, and the quality of the PCBs is ensured.

The invention discloses automatic clothing stacking equipment, and belongs to the field of clothing production and finishing processing. A laminating translation mechanism, a clamping and clothes pulling mechanism and a clothes placing and conveying mechanism are sequentially and fixedly arranged on the upper side of a clothes stacking support in the horizontal direction, a clothes clamping pressing plate is arranged on the upper side of a clothes clamping bearing plate, a main folding plate is arranged on one side of the middle of the clothes stacking frame, side folding plates are symmetrically arranged on the two sides of the clothes stacking frame correspondingly, a clothes placing plate is horizontally arranged in the clothes stacking frame, the clothes placing plate is arranged on atranslation guide rod in a sliding mode, a flattening ring tube is arranged on an arrangement support on the upper side of the clothes stacking frame, and a material falling mechanism is horizontallyarranged on a clothes conveying support on the upper side of a clothes conveying belt. According to the automatic clothing stacking equipment, the structural design is reasonable, the clothes can be stably and efficiently folded and processed, the clothes which can be folded and processed can be conveniently and smoothly placed into a packaging box in a convenient and smooth manner, automatic finishing processing of the clothes is realized, and the requirements of production and use are met.

The invention discloses a plate placing machine with a temporary storage function. The plate placing machine with the temporary storage function comprises a PCB feeding mechanism, a packing paper feeding mechanism, a taking mechanism, a conveying mechanism and a temporary storage mechanism. The PCB feeding mechanism and the packing paper feeding mechanism are both positioned at the upstream of thetaking mechanism, the taking mechanism is positioned at the upstream of the conveying mechanism and the temporary storage mechanism, and the PCB feeding mechanism, the packing paper feeding mechanism, the taking mechanism, the conveying mechanism and the temporary storage mechanism are all fixed to a machine frame. The taking mechanism comprises a transverse moving mechanism and a suction mechanism. The suction mechanism is fixed to the transverse moving mechanism, and the transverse moving mechanism comprises a transverse moving plate, a synchronous belt, a driven wheel, a driving wheel anda transverse moving driving motor for driving the driving wheel to rotate. According to the plate placing machine with the temporary storage function, a PCB is separated by packing paper, so that thePCB is prevented from being scratched and damaged, and the quality of the PCB is ensured; and when a circuit board is placed askew or damaged, the PCB can be temporarily stored on a supporting frame rod, and rapid, efficient and high-quality production is realized.

The invention relates to the field of glass, and discloses a composition for glass, aluminosilicate glass, and a preparation method and application thereof. Based on the weight of the composition, measured by oxides, the composition contains 55-68wt% of SiO2, 10-25wt% of Al2O3, 1-8wt% of B2O3, 0.01-5wt% of MgO, 10-19wt% of Na2O and 0.12-2wt% of TiO2. The flexible aluminosilicate glass disclosed by the invention has low brittleness and high fracture toughness and strength.

The invention provides a mechanical arm force control assembling device and method. The mechanical arm force control assembling device comprises a mechanical arm body provided with a complete moving mechanism, a control system, a force sensor, a clamping hand and an assembling platform provided with a clamp. The control system is installed inside the mechanical arm body. The force sensor is installed at the end of the mechanical arm body and connected with the control system. The clamping hand is installed on the force sensor. The assembling platform is arranged on the lateral portion of the mechanical arm body and located under the clamping hand. According to the mechanical arm force control assembling device and method, high-precision assembly of a shaft and a hole is guaranteed through pressure recognition assembly.

The invention provides a PCB partition paper collecting machine, which comprises a rack, a discharging driving mechanism, a material frame, a PCB conveying mechanism, a paper storage mechanism and a board collecting mechanical arm; a board collecting station is arranged on the rack; the material frame is arranged on the discharging driving mechanism and located on the board collecting station; the discharging driving mechanism can drive the material frame to move and leave the board collecting station; the PCB conveying mechanism is arranged on the rack and located on one side of the board collecting station; the paper storage mechanism is arranged on the rack and located on the other side of the board collecting station; and the board collecting mechanical arm is provided with a first material taking assembly and a second material taking assembly. The first material taking assembly and the second material taking assembly are driven by the board collecting mechanical arm to move together, so that the first material taking assembly sucks PCBs located on the PCB conveying mechanism, the second material taking assembly places sucked partition paper in the material frame, or the first material taking assembly places the sucked PCBs in the material frame, and the second material taking assembly sucks the partition paper located on the paper storage mechanism.

The invention provides a covered stent post-release device and a covered stent implantation system, and relates to the technical field of medical instruments, the covered stent post-release device comprises a guide seat, a pull wire seat, a locking structure, and a first pull wire and a plurality of second pull wires which are made of flexible materials; the first stay wire is wound on the outer or inner circumferential surface of the guide seat, one end of the first stay wire is fixedly connected to the pull wire seat, and the other end is fixed to the guide seat through the locking structure; one end of each second pull wire is fixedly connected to the guide seat, and the free end of each second pull wire is fixed between the first pull wire and the guide seat; and under the condition that the pull wire seat moves away from the guide seat, the first pull wire can be separated from the guide seat, so that the free ends of the plurality of second pull wires are released. According to the invention, the technical problems of high operation difficulty and low operation success rate caused by the fact that the blood vessel is easily scratched, the blood vessel is damaged and even broken by the existing post-covered stent release device and the blood vessel is greatly damaged because all parts of the near-end part of the covered stent are simultaneously released and bounced off outwards when the near end of the covered stent is released are solved.

The invention discloses a glue film automatic production line. The glue film automatic production line comprises a feeding device, a small hole die-cutting device, a first waste exhausting device, aninner frame die-cutting device, a second waste exhausting device and a release film die-cutting device, the feeding device is located at the upstream of the small hole die-cutting device, the small hole die-cutting device is located at the upstream of the first waste exhausting device, and the first waste exhausting device is located at the upstream of the inner frame die-cutting device; and the inner frame die-cutting device is located at the upstream of the second waste exhausting device, the second waste exhausting device is located at the upstream of the release film die-cutting device, the feeding device comprises a bottom material discharging roller, an edge attaching belt discharging roller, a first belt pressing mechanism, a second belt pressing mechanism and a third belt pressingmechanism in sequence according to the production process, a base material rewinding mechanism is arranged at the upper part of the second belt pressing mechanism, and an identification belt discharging roller is arranged above the third belt pressing mechanism. The glue film automatic production line is high in degree of automation, the fast, efficient and high-quality production is achieved, theartificial labor intensity is reduced, the utilization rate of the base material film is improved, and the production cost is saved.

The invention discloses a robot part processing clamp with a multi-angle fixing function. The robot part processing clamp comprises an installing platform, a movable disc and a clamping seat, the movable disc is arranged above the installing platform, the clamping seat is arranged below one end of the movable disc, and a bottom support plate is horizontally arranged below the movable disc. The robot part processing clamp has the beneficial effects that robot parts are clamped and fixed through a plurality of equally-spaced clamping jaws, it is ensured that the robot parts can be processed by aprocessing instrument more conveniently, efficiently and stably; a transferring and connecting seat drives the clamping seat to move front and back on the installing platform to adjust the position,on one hand, the position of processing of the robot parts by the processing instrument is more precise and adjustable, on the other hand, it is ensured that after the robot parts are processed, and the robot parts can be quickly and conveniently transferred and put to the specific position to be arranged; and a first motor drives the clamping seat to rotate by 360 degrees to ensure that the moving, transferring and putting efficiency of the robot parts is high and the scope is wider.

The invention discloses a zirconium carbide composition used in a fiber material and a preparation method thereof. The zirconium carbide composition comprises the following components by weight: 79-89.5% of zirconium carbide, 0.5-1% of a metal oxide and 10-20% of resin. The preparation method of the zirconium carbide composition consists of: firstly, putting zirconium carbide powder in an oily solution to perform mechanical grinding, then using the metal oxide to fill the recess on a zirconium carbide surface to reduce the height difference on the zirconium carbide surface, and finally performing cladding with a resin soft material to form a relatively flat powder surface. The pointed appearance existing on the powder surface can be reduced or eliminated, thus avoiding the guide wire scratching damage problem generated in a follow-up spinning process.

The invention relates to a movable cable of resistance to drag and scraping prevention and an extrusion forming mould device of the movable cable of resistance to drag and scraping prevention. The movable cable of resistance to drag and scraping prevention and an extrusion forming mould device of the movable cable of resistance to drag and scraping prevention are characterized in that the movable cable is composed of a plurality of soft qualitative copper conductor, an insulation coated layer, a filling rope, a rubber and plastic lining layer, an aramid fiber weaving strengthening layer, an elastic soft outer protecting sleeve layer, a wear-resistant rubber and plastic rib strip and the like. The extrusion forming mould device is composed of an extrusion forming front mould with the elastic soft outer protecting sleeve layer and an extrusion forming back mould of the wear-resistant rubber and plastic rib strip. The extrusion forming back mould of the wear-resistant rubber and plastic rib strip is composed of a mould seat, an inner mould, a front bearing, a back bearing, a ratchet wheel, a pressing cover and an electric heating coil. A rubber and plastic rib strip with a spiral shaped structure is arranged on the surface of a movable cable protecting sleeve layer. The movable cable of resistance to drag and scraping prevention is pulled and moved, a cable body is hung in the air from the ground, thus occurrence of scraping and breakage that the cable body is directly rubbed with the ground and hard objects is avoided. A contact area of the cable and the ground is greatly reduced at the same time, thus labor intensity when the cable is constructed and moved is relieved with a large degree.

The invention relates to a nuclear fuel component, a positioning grid and a spring. The spring comprises a contact part and two connecting parts, wherein the contact part is in tight pressing and contact with a fuel rod of a fuel component; the two connecting parts are arranged at two ends of the contact part in directions far away from the fuel rod; and water flowing holes are formed in positions close to the contact part, in the connecting parts. As the water flowing holes are formed in the connecting parts of the spring in positions close to the contact part, the flowing blocking area of the spring is reduced, and furthermore the pressure loss of the positioning grid is reduced; in addition, as the water flowing holes are not formed in the contact part, scratching of the fuel rod in the insertion process is avoided; and furthermore, due to formation of the water flowing holes, the rigidity of the spring is degraded, the elastic clamping force of the spring is increased, and the fuel rod can be relatively well clamped.