346results about How to "Guaranteed angle" patented technology

The invention discloses an attack time and attach angle constrained guidance strategy. The attack time and attach angle constrained guidance strategy comprises the following steps of using a two-dimensional horizontal plane where a missile and a target are located as an attack plane, establishing a missile and target mathematical model and acquiring a missile sight angle second-order dynamic equation; designing the guidance strategy based on a virtual collision point, dividing the guidance process into two stages, designing an attack angle constrained guidance law based on the virtual collision point for the first stage and designing a proportional guidance law for the second stage; designing a switching strategy of the attack angle constrained guidance law and the proportional guidance law based on the virtual collision point; and adjusting the location of the virtual collision point. By means of the guidance strategy based on the virtual collision point, there is no need to conduct linearization and differential equation conversion based on the cross-range on the model and depend on estimation on remaining time information; the attack time and attach angle constrained guidance strategy is applicable to target moving tasks under multiple constraint conditions and has the characteristics that the design method is simple, and the applicability is high.

The invention discloses a multi-specification combined elbow welding tool, which comprises a base and an upper seat, wherein the base is connected with the upper seat in a rotating way; a screw rod is arranged on the base, and is also connected with a positioning flange on the base through a connecting nut; the structure of the upper seat is the same as that of the base; a positioning seat is also arranged on the base; a positioning shifting fork is connected to the positioning seat through a pin shaft; a locking mechanism is arranged on the positioning shifting fork and the base; an angle adjustment mechanism is also arranged between the base and the upper seat. According to the multi-specification combined elbow welding tool, the size and the angle of a finished product elbow is directly determined through the tool, and flanges and elbow pieces are placed on the tool for integral assembly-welding, so that the angle and the size of the elbow can be ensured, and the finished product elbow can be ensured to be qualified.

The invention discloses a method for collecting fins and arranging and combining the fins and flat pipes, which comprises the following steps of: (1) finishing equidistant arrangement of the flat pipes by using a pipe-arranging mold; (2) covering a large tray on the arranged flat pipes, turning, and putting the flat pipes into a fin and flat pipe collecting device assembly; (3) pushing a movable block to make the large tray support the flat pipes so as to clamp front ends of the flat pipes in a clamping groove of a guide block, and taking the pipe-arranging mold out; (4) automatically guiding the fins into a guide groove which is composed of the guide block and the flat pipes, and finishing the fin collection and arrangement of the flat pipes; and (5) loosening the movable block, collecting the arranged fins and flat pipes in a small tray or directly assembling the fins and the flat pipes, or stacking and storing the fins and the flat pipes. The invention also provides a corresponding device according to the method, which mainly comprises a pipe-arranging mold, a fin and flat pipe collecting device assembly and a small tray. The method for collecting the fins and arranging and combining the fins and the flat pipes has the advantages of no need of manually collecting the fins, reduction of a transfer program, capacity of preventing adhesion between the fins, automatically arranging the fins and the flat pipes, improving the product quality, along with low equipment investment and contribution to lean production.

The present invention relates to a milling cutter provided with an equidistant arc head on an eccentric shape flank surface and a grinding method, the cutter can reduce the vibration during the process of processing of different hardness of hardened steels for splicing of a mould, the cutter life and workpiece surface quality can be improved, the flank surface shape can be changed, and the cutter tip strength can be improved. The milling cutter is an overall hard alloy end milling cutter. The milling cutter includes a cutter shank (1) and the arc head (2), the arc head includes a large curvature arc (2-1) and a small curvature arc (2-2). Tooth-spacing angles are 87 degrees, 93 degrees, 87 degrees, and 93 degrees, tooth-spacing vertical angles are equal, helix angle (r) is 38 degrees, helix angle (v) is 40 degrees, and cutter end cutting edge flank surface (10) and circumferential cutting edge (6) are in eccentric shape. Front angle is in the range of 0-3 degrees, first clearance angle is in the range of 8-10 degrees, and second clearance angle is in the range of 15-22 degrees. The center position of the cutter is provided with cooling channels (3), the number of the cooling channels is four, and the four cooling channels respectively are located four cutting edge end tooth chip pockets. The present invention also provides a reference for the grinding of the cutter of the type.

The invention relates to a water jet surgical instrument (10), comprising a feed line for feeding a cutting fluid, and an ejection nozzle (11) for forming and ejecting a fluid jet at a predetermined expansion angle and/or at a predetermined discharge energy. A jet-forming device (12) is disposed relative to the ejection nozzle such that the fluid jet is or can be adjusted by the jet-forming device with respect to the expansion angle and/or the discharge energy thereof.

The invention discloses a method for locating a main girder cable sleeve of a cable-stayed bridge. The method comprises the steps of: (1) manufacturing a tooth block model for anchoring according to the physical dimension of a tooth block anchoring model; (2) fixing the tooth block anchoring model on the surface of a main girder bottom template according to the locating coordinate of a cable anchor point; (3) welding the lower end of the cable sleeve on an anchor plate, and fixing the anchor plate on the inclined plane of the tooth block anchoring model; and (4) manufacturing a cable sleeve embedded bracket to support the cable sleeve below the cable sleeve, thus enabling the angle and direction of the cable sleeve and the deviation of the cable sleeve along the bridge direction completely to accord with the design and specification requirement. The angle of the cable sleeve is ensured by adopting the cable sleeve embedded bracket; the construction method is simple; the calculation and the welding do not occupy the time limit for the project; and the installation is simple; time and effort are saved, and a lot of technicists and devices are saved.

The invention relates to a method for measuring the parameter of an omega welding seam defect, in particular to a method for measuring the parameter of an omega welding seam defect, which is applied to a control rod drive mechanism of a nuclear power plant. The method adopts a welding technique estimation test piece of the omega welding seam to manufacture a contrast test block, adopts an automatic detection device containing an ultrasonic detection method and a vortex detection method to measure the parameter of the defect and judges the parameter of the defect integrally. The method can effectively measure the parameter of the omega welding seam defect of the control rod drive mechanism of the nuclear power plant accurately, provides data support for the preventive maintenance of the control rod drive mechanism, provides guarantee for the nuclear safety and is suitable for detecting the parameter of the welding seam defect in nuclear industry system.

The invention relates to a manufacturing method of a multi-direction four-anchor-head integral steel anchor beam. The manufacturing method comprises the following steps of (1) manufacturing of a web unit, (2) manufacturing of a bottom board unit, (3) manufacturing of an anchor backing plate, (4) assembly welding of an anchor head unit, (5) assembly of the web unit with the anchor head unit, (6) assembly of the bottom board unit, and (7) assembly of other functional boards. The manufacturing method of the multi-direction four-anchor-head integral steel anchor beam has the advantages that the manufacturing method mainly comprises the steps of manufacturing of the web unit, manufacturing of the bottom board unit, manufacturing of the anchor backing plate, assembly welding of the anchor head unit, assembly of the web unit with the anchor head unit, assembly of the bottom board unit, and assembly of other functional boards, the manufacturing process is reasonable, and the manufacturing quality and assembly welding smoothness are ensured. The manufacturing method further has the advantages of being simple, convenient to implement and high in precision.

The invention relates to a tennis ball launching device, in particular to an automatic tennis ball launching device. The technical problem is to provide the automatic tennis ball launching device, which can well control ball launching strength and angle, and the training quality is not affected. The automatic tennis ball launching device comprises a bottom plate, a feeding barrel, a launching barrel and the like. The feeding barrel is fixedly connected to the upper side of the bottom plate, and a launching barrel is fixedly connected to the end of the feeding barrel. Tennis balls in the launching barrel can be pushed through a first push block to make the ball launched out, people can pull a pull rod to the same position every time to guarantee the ball serving strength, the launching barrel is fixed, and the ball serving angle can be guaranteed, so that the training quality is not affected; and under the action of a silencing pad and a buffer spring, when the tennis ball is launched from the opening in the rear end in a launch canister, the effects of silencing and shock absorption can be achieved.

The invention relates to the field of movement mechanism, in particular to an all-dimensional wheel and an all-dimensional mobile platform using the same. The all-dimensional wheel comprises a hub and an integral roller assembled on the hub through a roller shaft, two ends of the roller shaft protrude out of corresponding rollers, external threads are arranged on portions protruding out of the rollers, the hub comprises a left support rotation disc, a right support rotation disc and a shaft sleeve, the left support rotation disc and the right support rotation disc are relatively arranged, the shaft sleeve is coaxially connected between the left support rotation disc and the right support rotation disc, one end of the roller shaft is inserted in an installation hole arranged on the left support rotation disc and fixed through a nut, the right support rotation disc is close to the shaft sleeve and is detachably and fixedly connected with the shaft sleeve when the roller shaft is fixed on the left support rotation disc, an abdicating hole which abdicates for the roller shaft relative to movement of the right support rotation disc in a process that the right support rotation disc is close to the shaft sleeve from right to left is arranged on the right support rotation disc, one end of the roller shaft far away from the left support rotation disc is inserted in the corresponding abdicating hole and fixed through a nut, and a problem that the all-dimensional wheel is poor in strength and prone to lose efficiency is solved.

In order to solve the problems of imperfect surface defect detection information, low precision, low efficiency and the like, the invention provides a defect detection method based on a polarization structured light imaging technology and an improved Mask RCNN. The method comprises the following steps: firstly, combining polarization processing with structured light three-dimensional imaging to obtain a high-definition two-dimensional physical graph and three-dimensional space information of an object; performing median filtering processing on the two-dimensional physical graph; secondly, on the basis of a Mask RCNN target recognition method, adding a K-means algorithm to carry out clustering analysis on a training set, adding branches with side edge connection from top to bottom to an original FPN structure, and combining lower-layer high-resolution features and upper-layer high-resolution features to generate a new feature map; detecting an image with defects by utilizing the improved Mask RCNN network, and classifying, positioning and segmenting the defects; finally, obtaining a series of information such as the type, position, length, width, depth and area of the defect throughdata arrangement, achieving quantification of defect data, and the object surface defect detection precision and efficiency are effectively improved.

The invention relates to a method of abutting joint of two total segments in the shipbuilding process, which utilizes a laser theodolite to measure the same surface degree of an abutting joint seam. The laser theodolite must be arranged to be orthogonal with the center line of a hull. Under the condition of a ruling line detected to be beyond a size, the remain is cut to ensure the surface degree tolerance of a finished abutting joint surface to be at most 2 mm. The method increases the construction abutting joint accuracy and speed of the two total segments and reduces hull trimming workload and the occurring of two positioning accidents. The laser theodolite is used to measure, score and finish an end surface, and firstly the same surface degree of the abutting joint surface and the orthogonality of the abutting joint surface and a center surface must be ensured. A baseline on a bottom folding target rod is utilized to measure the deflection degree of the bottom baseline, therefore the slope of the baseline is determined, and finally the method ensures the angle between the abutting joint plane and a baseline surface to be a right angle.

The invention relates to a deep-hole smooth tunnel blasting system. The deep-hole smooth tunnel blasting system comprises a multi-shaft drilling mechanism and a deep-hole smooth blasting mechanism; the drilling mechanism comprises a drill rod arranged on an adjusting bracket, the drill rod is driven by a horizontal driving mechanism to move horizontally and implement hole digging operation, and a spatial position, located on the adjusting bracket, of the drill rod can be adjusted; the deep-hole smooth blasting mechanism comprises a plurality of explosive material charging tube standard joints arranged in a blasting hole; tube openings of the explosive material charging tube standard joints are sequentially connected to form a blasting tube, and trays are arranged on the connecting parts of adjacent explosive material charging tube standard joints for supporting explosive materials; a base is arranged at one end of the blasting tube, and a top cover is arranged at the other end of the blasting tube; and a through hole is formed in the tray surface of the tray for penetrating of a detonating cord, the detonating cord sequentially and upwardly penetrates through the through hole in the tray from the base and leads out from a through hole formed in the top cove of the blasting tube, and cracks are further arranged on the tray. The deep-hole smooth tunnel blasting system can improve the drilling efficiency, and weaken the influence of complex geological environment of a coal mine on explosive material charging at the same time, and premature overflowing of explosion gas is prevented.

The invention belongs to the technical field of medical technologies and discloses a method for positioning and guiding bone drilling through 3D modelling of a medical image. The method comprises steps as follows: step A, the body position of a patient is fixed, and a target area is marked on the body surface of the patient; besides, information and identification number of the patient are recorded, and an operation plan is formulated; step B, image examination data of the target area of the patient are acquired and imported into a processing system for dimensional reconstruction; step C, a sick body model is imported into a computer 3D treatment plan system for dimension development, and information of to-be-drilled bone is determined and added; step D, an exported 3D data packet is imported into bone drilling equipment and track equipment, and an operation origin of the track equipment and an origin of a 3D coordinate in the 3D data packet coincide; step E, alignment along a laser ray and bone drilling are performed. When bone is required to be fixed, the bone drilling equipment is used for drilling the bone, later implantation of bone nails is facilitated, and the bone nail implantation accuracy is improved.

The invention provides a CARP optimizing and cleaning device, and relates to the field of machine manufacturing. The CARP optimizing and cleaning device comprises a polyurethane blade (1) and an aluminum alloy insert (2). The polyurethane blade (1) is embedded in the aluminum alloy insert (2). An oblique contact face (1-1) is arranged on the inner side face of the upper end of the polyurethane blade (1), and the included angle alpha between the contact face (1-1) and the perpendicular line is 20-30 degrees. According to the friction coefficient between the blade and a belt, material property of the CARP optimizing and cleaning device and characters of conveyed materials, the shape and size of the blade are designed through difference, the contact area and sweeping angle of a cleaner are guaranteed, materials which fall down on the belt can be completely eliminated, the blade is made of the polyurethane material, so that wear resistance of the blade is ensured, and the service life of the blade is guaranteed.

The invention discloses a stainless steel television frame forming process. The stainless steel television frame forming process comprises the following steps of 1, conducting blanking; 2, forming a groove in a to-be-bent position of a material through planing; 3, bending the material along the groove planed in step 2; 4, conducting cutting, wherein the boundary dimensions of each frame are made to reach the design requirement; and 5, welding structural components. By means of the stainless steel television frame forming process, location and connection of all the frames can be conducted conveniently; after being formed, a product is great in stability; and the produced frames are good in straightness and attractive in appearance.

The invention provides an elastic self slope type floating ice protection device. The purpose of the elastic self slope type floating ice protection device is to reduce ice-induced vibration of a protection structure effectively, at the same time, control inclination angles of action surfaces, achieve bending failures of ice sheets, and achieve protection effects of icing disasters at different water levels. The elastic self slope type floating ice protection device is composed of a faceplate, a base plate, a beam, an upper cross bar, a lower cross bar, an upper cross bar spring, a lower cross bar spring, connecting nuts, hollow bolts, limiting nuts, faceplate slide grooves, hinged joints and trusses. According to the elastic self slope type floating ice protection device, the faceplate and the beam form a slope type protection structure capable of changing angles, and the faceplate, the springs, the upper/lower cross bar and the hollow bolts form an energy dissipation system. The purpose of adapting to changes of water levels of protection water areas and controlling the inclination angle of the faceplate through selections of design parameters can be achieved. By combining common characteristics of an elastic energy dissipation device and an inclined-plane floating ice protection device, the elastic self slope type floating ice protection device is suitable for structures of large-scale cofferdams, construction work platforms, bridge foundations and the like.

The invention discloses an efficiently-adjusting module sliding system, and belongs to the technical field of module sliding auxiliary devices. The efficiently-adjusting module sliding system is characterized in that a diameter reducing radiation beam girder assembly in a diameter reducing assembly type module sliding platform and a fixed diameter radiation beam girder assembly are connected by a first splicing joint, a second splicing joint and a third splicing joint, and bolt holes of a first pull-out support, a second pull-out support, a third pull-out support and a fourth pull-out support in a concrete thickness adjusting mechanism are waist-shaped; the upper part and the lower part of an inner steel template in a template taper adjusting mechanism are respectively connected with a first upper connecting piece and a third lower connecting piece through bolts, and the upper part and the lower part of an outer steel template are respectively connected with a second upper connecting piece and a fourth lower connecting piece through bolts. The efficiently-adjusting module sliding system provided by the invention has the advantages that the cylinder wall thickness range suitable for the module sliding system is improved, each template can keep an exact tiny angle when the template is connected with a surrounding ring, and the length of a radiation beam is increased or reduced through changing the diameter reducing radiation beam girder assembly.

The invention discloses a design method for forming a flower transplanting track by a two-stage non-circular gear five-bar driving mechanism. An existing transplanting mechanism track is not suitable for flower transplantation. The design method specifically comprises the following steps: firstly, constructing a two-stage non-circular gear five-bar driving mechanism, and establishing a free end point of a second connecting rod, so as to form a mathematical model of a double-buckle track; then reversely determining angular velocity change rules of a first crank and a second crank through the established mathematical model, designing a two-stage non-circular gear, and verifying whether the two-stage non-circular gear five-bar driving mechanism satisfies existence conditions of the double cranks. According to the design method, the angular velocity ratio of the first crank to the second crank is changed by adopting the two-stage non-circular gear five-bar driving mechanism, the double-buckle track is realized, so as to realize seedling taking and planting motions, the flower transplanting track can be realized, and full automatic transplantation of various crops such as fruits and vegetables can be realized.

The invention discloses a slotting device for forming a steel wire thread sleeve fractured slot. The slotting device comprises a workbench, a control cabinet, a slotting machine and a limiting and adjusting device, wherein the slotting machine comprises a motor and a slotting abrasive disc in coaxial chained connection with the motor; the limiting and adjusting device comprises a cylinder adjusting rod, a connecting block, a base and a support frame; the base is fixed on the surface of the workbench, a bearing and a connecting shaft are arranged in the connecting block, the connecting shaft stretches out of through holes of the connecting block and the base, and by sleeving the steel wire thread sleeve on a guide rod of the cylinder adjusting rod and adjusting a vernier device and an adjusting part, the distance between the steel wire thread sleeve sleeved on the guide rod and the slotting machine can be precisely adjusted, and the depth, the angle and the position of fractured slots of batch steel wire thread sleeves can be precisely ensured.

The invention discloses a fixed line feed apparatus of an ultrasonic probe in an ultrasonic wave stress measurement system. The apparatus comprises a track rack, fixing sucking discs, a probe fixing wedge, a probe fixing chamber 1, a probe fixing chamber 2 and a coupling monitor, wherein a cross section of the track rack is in a ''door'' shape; two side surfaces of the track rack along a length direction are provided with horizontal straight slots; a tapered bolt hole and a tapered bolt are arranged above the straight slots; a material which is used to form the tapered bolt hole, a material between the tapered bolt hole and the straight slots and a material below the straight slots are an elastic material; the fixing sucking discs are arranged on two ends of the track rack; the probe fixing wedge is arranged in the track rack; left and right side surfaces of the probe fixing wedge are provided with slide handles; the probe fixing chamber 1 and the probe fixing chamber 2 are fixed to an upper-left portion and an upper-right portion of the probe fixing wedge; the coupling monitor is formed by a monitoring indication lamp, a pressure sensor which is electrically connected to the monitoring indication lamp and a resistor sensor. By using the apparatus, the ultrasonic probe can be accurately positioned; a coupling state between the ultrasonic probe and a component to be measured is guaranteed to be consistent with a coupling state used during calibration; measurement precision of an ultrasonic wave detection method is increased.