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 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.

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 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.