32results about How to "Guaranteed Tolerance Requirements" patented technology

The invention provides an on-line correction device and method of an X-ray thickness gauge. The method includes that during measurement of the X-ray thickness gauge, X ray is divided into working ray and non-working ray, the working ray is used for measuring thickness of a measured object, and the non-working ray is used for obtaining strength of the X ray; the strength of the X ray is monitored according to the non-working ray; when the strength change of the X ray exceeds a threshold value, a calibration curve is corrected, and the calibration curve is a relation curve between the working ray and the thickness of the measured object. The on-line correction device and method of the X-ray thickness gauge has the advantages that the influence of the strength changes of the X ray on the measuring accuracy can be eliminated, accurate thickness measured values can be provided for a rolling mill thickness controlling system, increasing of the controlling accuracy of a rolling mill can be facilitated, and the requirement of tolerance of rolled strip materials can be guaranteed.

The present invention discloses an aerodynamic control localizer comprising a mechanical locating controller, a locating rod moving through the mechanical locating controller and electric and aerodynamic parts. The present invention is characterized in that the lower end of the locating rod which is equipped and can slide in the mechanical locating controller is connected with a floating head connected with a cylinder link lever and an initiative locating shim which makes the locating rod end reach the initiative locating position; the cylinder link lever drives the locating rod move axially by the connected axial cylinder; with a connected bullet pin, tangential cylinders equipped on both sides of the locating rod implement hole-to-hole location of the locating rod and the mechanical locating controller base to realize tangential location to make the locating device reach the final coordinate position. The localizer is characterized by simple flexible accurate structure, stable locating coordinates and conveniently controlled automatic operation. The present invention will thoroughly change and overcome the defect of the traditional screw type localizer that the locating accuracy is not high, location is not stable and the production cycle is long. Moreover, the volume is decreased by about one third compared with the tradition al screw type localizer.

The invention discloses a method for machining a mobile phone middle frame based on a floating datum. The method includes the steps that the mobile phone middle frame is positioned by a jig, so that afirst positioning face on the jig and a first datum face, used for guaranteeing the first machining size, on the mobile phone middle frame are attached flatly; the position of the mobile phone middleframe is adjusted, a floating datum face on the floating datum and a second datum face, used for guaranteeing the second machining size, on the mobile phone middle frame are attached flatly, and halfof the floating datum face is exposed out of the second datum face; a to-be-machined product is clamped by a clamp; a Z direction coordinate value of the floating datum face is detected; the Z direction coordinate value of the floating datum face is compensated into a machining program of a corresponding machining face; and the machining program controls a cutter to machine to the surface of themobile phone middle frame. During batch production, due to one-time clamping, the tolerance requirement of different machining sizes of different datum faces existing in the machined product is stablyguaranteed, the yield is guaranteed, and the efficiency of batch production is improved.

The invention discloses a ray-type thickness gauge and a calibration method thereof. The thickness gauge comprises a ray source, a ray detector, a pre-amplification circuit board, a control cabinet, a terminal display and operation device, and a C-shaped rack, wherein the ray source is arranged at the lower part of the throat gap of the C-shaped rack; the ray detector is arranged at the upper part of the throat gap of the C-shaped rack; a to-be-measured metal belt penetrates through the throat gap of the C-shaped rack; the pre-amplification circuit board is connected with the control cabinet; and the control cabinet is connected with the terminal display and operation device, and is used for calculating and displaying a thickness and receiving the instruction of an operator. According to the calibration method of the thickness gauge, the measuring accuracy after fast calibration can reach the precision level of a just calibrated thickness gauge, so as to save time spent in re-calibration, eliminate an error caused by anthropic factors during calibration carried out by the operator, and provide a high-precision thickness measure value for the thickness control system of a rolling mill. Therefore, the production efficiency of the rolling mill can be improved; and the tolerance requirement of the metal belt rolled by the rolling mill can be guaranteed.

The invention belongs to the technical field of design and relates to an upper end cover assembly of a flexible strapdown gyroscope. In the invention, the strapdown gyroscope is divided into an upper body and a lower body, so that the influence of electromagnetic interference and heat emission of a gyro motor on an announciator and a torquer is reduced and the upper end cover assembly has an obvious effect of improving the accuracy of a small gyroscope; the processing on an announciator iron core is completed on an upper end cover of the gyroscope, so that the integration of the announciator iron core and the upper end cover is realized, the volume of the gyroscope is effectively shortened, and the number of parts and the assembly workload are reduced; and a torquer assembly is arranged on the upper end cover, so that the influence of heat emission of a large current on the performance of the gyroscope when the gyroscope works under a high angular speed is reduced.

An electrical valve for adjusting fluid flow comprises a valve seat (12) provided with a valve chamber (121) and a valve plug seat (11) with a valve port (113) fixed on the valve seat; a valve needle-screw stem assembly comprises a screw stem (23) and a valve needle (21) drivable by the screw stem (23); a nut assembly comprises a nut (32) and a connecting plate (31), wherein the connecting plate is fixedly connected to the valve seat, the nut thread fits the screw stem, the nut is provided with a lower pilot segment (321) thereof, the valve needle is provided with a lower pilot segment (211), and the valve plug seat is provided with a first pilot segment (111) fitting the lower pilot segment of the nut and a second pilot segment (112) fitting the lower pilot of the valve needle. The electrical valve enables concentricity between the nut and the valve needle-screw stem assembly, and concentricity between the nut and the valve port of the valve plug seat to be easily ensured, so as to prevent the problems of the valve port not being sealed tightly or the valve port being worn eccentrically, such that the operational reliability of the electrical valve is increased.

A cutting-off and material returning device for cutting off automobile door glass guide rails comprises a base, a clamping mechanism, a cutting-off mechanism and a material returning mechanism. The clamping mechanism comprises a clamping oil cylinder, a sliding block, a movable clamping block and a clamping assembly. A clamping oil cylinder piston rod is fixedly connected with one end of the sliding block, and the other end of the sliding block is fixedly connected with the movable clamping block through a movable clamping block mounting seat. An upper wedge and a lower wedge are fixed to the upper portion and the lower portion of the movable clamping block correspondingly. The clamping assembly comprises an upper knife, a middle shaping plate and a lower knife. The middle shaping plate is fixed to a mounting frame. The upper knife and the lower knife are connected to the upper portion and the lower portion of the middle shaping plate in a floating mode correspondingly. The front end of the movable clamping block corresponds to the middle shaping plate. The upper wedge and the lower wedge correspond to the upper portion of the upper knife and the lower portion of the lower knife respectively. The cutting-off mechanism comprises a cutting-off oil cylinder and a cutting-off knife. The material returning mechanism comprises a material returning oil cylinder and a material returning rod. According to the cutting-off and material returning device for cutting off the automobile door glass guide rails, structure setting is ingenious, feeding is convenient, material returning is smooth, non-deformation of cut-off products can be guaranteed, and an automatic material returning function can be completed after cutting-off.

The invention discloses an optical element gravity deformation compensating device, which comprises an optical element, a deformable mirror frame, a pair of annular electromagnets, a capacitive sensor and an upper cover plate; the deformable mirror frame is composed of a mirror frame inner ring, a mirror frame outer ring and a supporting ring The integrated structure of the mirror frame, the inner ring of the frame is fixedly connected with the optical element through the glue injection hole on the side wall, the lower part of the supporting ring is in contact with the boss of the outer mirror frame to provide a support point, and a ring electromagnet is installed on the upper part of the outer ring of the mirror frame. The repulsion provides a vertical downward displacement. After loading, the outer frame of the deformable mirror frame drives the inner frame to move axially, which causes the optical element to deform, and finally realizes the compensation of rotationally symmetrical aberrations; it has the advantages of simple structure and reasonable design.

The embodiment of the invention discloses a method for processing a crankshaft of a multiaxial warp knitting machine. The crankshaft comprises a spindle diameter and a connecting rod diameter. The connecting rod diameter is connected with the spindle diameter. The method comprises the following steps of: step A: processing a raw material through the steps of drilling a first center hole, roughly turning, hardening and tempering, and fine turning an outer diameter to obtain a polished shaft; step B: respectively drilling a second center hole of the crankshaft and a third center hole of the connecting rod diameter at the opposite positions at both ends of the polished shaft, drilling a process positioning hole at the position at a distance of 20mm from the first center hole, carrying out fine turning on the spindle diameter and the connecting rod diameter according to the process positioning hole, the second center hole and the third center hole, and carrying out milling and rough grinding to obtain a semi-finished product; and step C: carrying out high-frequency quenching on the semi-finished product, drilling and reaming pin holes at both ends of the semi-finished product and carrying out fine grinding processing to obtain a finished product. In the embodiment of the invention, when the outer diameter, the spindle diameter and the connecting rod diameter are subjected to fine turning, positioning is carried out through the process positioning hole and the respective center holes, so that when the outer diameter, the spindle diameter and the connecting rod diameter are processed, the requirement on a tolerance of the eccentricity of the connecting rod diameter and the spindle diameter of the crankshaft can be guaranteed.

The invention relates to a method for processing vertical pin holes in workpiece taper faces. The method includes the following steps: (1) designing a second workpiece matching with the taper face of a workpiece according to the shape of the taper face of the workpiece, wherein the second workpiece comprises a horizontal surface and a surface matching with the taper face of the workpiece; (2) welding the workpiece with the second workpiece; (3) aligning a drill bit with the central portion of the horizontal surface of the second workpiece to drill downwards vertically till reaching the needed depth of the pin hole; (4) using a cutting tool to cut open the workpiece with the taper face and the second workpiece; (5) grinding the workpiece with the taper face to smooth. The method solves the problem that direct processing cannot be carried out without work aids; combination is facilitated, operation is simple, performance is high, timesaving and laborsaving effect is achieved, and quality and tolerance requirements of the processed pin hole are assured; cutting precision is improved, harm to workpieces is small, and the method is an efficient taper-face workpiece perforating method.

The invention discloses a distribution type heat collection board molding method. The method comprises the steps that a stainless steel clamp plate which is integrally molded is firstly designed, and the whole flatness of the clamp plate meets the use requirement; according to the appearance requirement for machining a distribution type heat collection board, fins and wheel type embedded blocks are machined, and the heat collection board is assembled; through the integrally-molded stainless steel clamp plate, the novel distribution type heat collection plate is subjected to whole brazing, and in the brazing process, the welding temperature condition is strictly ensured; a process hole is formed in the heat collection plate obtained after brazing. According to the method, the problem that the technical requirement caused by increasing of the appearance size, increasing of number of mechanical connectors, irregular distribution of hot connectors and the like of a novel returning satellite single-phase fluid loop heat collection board needs to be improved, and consequently, the heat collection problem to manufacturing and molding of the heat collection board is caused is solved.