Abstract:
PURPOSE:To measure the deviation value of a centroid position in the radius direction of the rotary center axis of a cylindrical body by finding out the coordinates of the rotary centroid of the cylindrical body. CONSTITUTION:Driving chucks 2, 3 are fitted to both the ends of the thin cylindrical body 1 and supported by two rollers each. The center of the chuck 2 is coupled with a driving device 6 through a universal joint 4, an angle detector 7 for measuring the turning angle of the cylindrical body 1 is fitted to the device and a thickness measuring sensor 9 is fitted to the external surface of the cylindrical body 1. The deviation delta and thickness (t) of the external size between a reference circle 12 and the cylindrical body 1 which corresponds to the positional angle theta measured by the angle detector 7 are measured by a deviation measuring device 8 having a sensor contacted with the external surface of the cylindrical body 1 and to be reciprocated in accordance with the deviation of the centroid position based upon the shape error and positional shift of the cylindrical body 1 at respective measuring point (i) obtained by dividing the outer periphery of the cylindrical body 1 into n parts and the coordinates Zo, Yo of the centroid G to the center B of the reference circle 12 are calculated. Consequently, the deviation of the radius direction from the rotary center shaft at an optional position in a longitudinal direction can be found out.
Abstract:
PURPOSE:To simply and firmly clamp the bulging dies on purpose to perform the bulging with good accuracy and in low cost, by fitting the bulging die, which is separated into two pieces that are protruded outside so as to form the protuberant portion, into the clamper in which the tapered hollow portion is formed correspondingly to above mentioned protuberant portion.
Abstract:
PURPOSE:To shorten the overall length of a cylindrical molding machine, lessen the deflection of the molding machine caused by the pressure of molding outer shape at the time of bellow molding and attaining high accuracy of bellow molding by providing bearing sections which slide specifically at both ends of a cylinder. CONSTITUTION:Both ends of a cylinder 6 are retained by cylinder retaining sections 12 and 13. When the side surface of a cylinder 6 is pressed by a molding outer shape 5, the cylinder 6 is transferred to the position to come into contact with a shaft 1 and clamped by the molding outer shape 5 and a molding inner shape 4. Further, when the cylinder 6 is pressed by the molding outer shape 5, plastic deformation of the cylinder surface is started by the action of the recessed section of the molding outer shape 5 and the projected section of the molding inner shape 4 to shrink the overall length of the cylinder 6. As bearing sections 10 and 11, however, slide along the shaft 1, a bellows 6C of good accuracy is molded on the side surface of the cylinder 6. Since the shaft 1 is short, the deflection of the shaft 1 is small even when the molding load is applied from the molding outer shape 5 to the shaft 1, and a belows of high accuracy can be molded. Also, as the bearing section 10 can be slided outside the shaft 1, the cylinder 6 can be on and off the shaft 1 easily.
Abstract:
PURPOSE:To grind the work in uniformed depth and in precision by enabling to change arbitrarily the pressed amount of belt for grinding on the work in the titled apparatus to grind partially such a surface of work having a desired curved surface as a cylinder. CONSTITUTION:Grinding head 8, each feed gear and measuring sensor 11 are connected with a micro computer. At the time of grinding when grinding position and grinding amount are instructed, the grinding head 8 moves its head to the grinding position of the work through cash feed gear. Further, the area to be eliminated and the depth of elimination are calculated out from the instructed eliminating amount, and the head 8 repeats swinging axially to left and right, the work does swinging synchronously with the left and right motion through holder 4. The sensor 11 is arranged at two points or more in accordance with the work's charactteristics among the measuring points (a)-(g), and the depth of elimination is calculated out from the balance of distance from the sensors for the eliminated partIand the uneliminated part II to the surface of work.
Abstract:
PURPOSE:To obtain the quantity of an arbitrary section of a cylinder body, which bends, from the positional difference of the centroid to the center of revolution in sections in arbitrary numbers in the longitudinal direction of the cylinder body, by revolving the cylinder body centering around an axial core functioning as the reference. CONSTITUTION:Lining system drive chucks 2, 3 are mounted to the both ends of a thin cylinder body 1, and each chuck is supported by means of several two rollers 5. The center of the drive chuck 2 is connected to a driving gear 6 through a universal joint 4, and an angle detector 7 is installed. A thickness measuring sensor 9 is disposed onto an outer surface at an arbitrary location in the longitudinal direction of a material to be measured 1, and measuring value is displayed to an annunciator 10. The deviation delta of the dimensions of a base circle 12 corresponding to an angle gained by means of the angle detector 7 and an outer surface of the material to be measured and thickness t are acquired at locations where an outer circumference is equally divided into n portions, and the coordinates of the centroid G to the center of the base circle 12 are obtained by operation.