A process for manufacturing an optical element comprising a first step of spinning a circular sheet of a first metallic material for it to adhere to a rotating matrix and form a shell; a second step of assembling the shell on a temporary support; and at least a third step of diamond turning the shell by means of a diamond tool to obtain an optical surface.

The invention relates to a method and a device for spin forming, wherein a workpiece is set in rotation by means of a spindle and at least one outer roller is positioned at an outer side of the workpiece. With material thinning, an axially extending lateral region of the workpiece is shaped. According to the invention, it is provided that at least one inner roller is positioned at an inner side of the workpiece by means of an inner support, which is displaceable axially and radially relative to the axis of rotation independently of the outer roller. By means of a CNC control unit, the inner support with the inner roller and an outer support with the outer roller are displaced individually, wherein there is formed at the lateral region a defined wall thickness profile with different wall thicknesses between the at least one outer roller and the at least one inner roller.

The invention relates to a method and a device for spin forming, wherein a workpiece is set in rotation by means of a spindle and at least one outer roller is positioned at an outer side of the workpiece. With material thinning, an axially extending lateral region of the workpiece is shaped. According to the invention, it is provided that at least one inner roller is positioned at an inner side of the workpiece by means of an inner support, which is displaceable axially and radially relative to the axis of rotation independently of the outer roller. By means of a CNC control unit, the inner support with the inner roller and an outer support with the outer roller are displaced individually, wherein there is formed at the lateral region a defined wall thickness profile with different wall thicknesses between the at least one outer roller and the at least one inner roller.

Thermally laminated foam boards, methods for making thermally laminated foam boards, apparatus for making thermally laminated foam boards, smaller foam pieces made from thermally laminated foam boards, methods for making smaller foam pieces from thermally laminated foam boards, parts made from thermally laminated foam boards, methods for making parts from thermally laminated foam boards, and tools for making parts from thermally laminated foam boards are disclosed. The thermally laminated foam boards are made by thermally bonding at least two polystyrene boards together.

Thermally laminated foam boards, methods for making thermally laminated foam boards, apparatus for making thermally laminated foam boards, smaller foam pieces made from thermally laminated foam boards, methods for making smaller foam pieces from thermally laminated foam boards, parts made from thermally laminated foam boards, methods for making parts from thermally laminated foam boards, and tools for making parts from thermally laminated foam boards are disclosed. The thermally laminated foam boards are made by thermally bonding at least two polystyrene boards together.

The present application discloses an on-line induction heating device for a wheel blank, consisting of a frame, a servo motor, guide posts I, guide sleeves I, a lower fixed plate, a lifting top plate, a bearing seat, a jacking cylinder, a piston connecting rod, a top cone, reset springs, radial positioning blocks, upper fixed plates, induction heating cylinders, connecting rods, double-head fastening nuts, fixed slide rails, mounting plates, outer protective jackets, induction coils, a displacement sensor I, a compression cylinder, a guide sleeve II, a guide post II, a gland, pressure sensors, asbestos, a displacement sensor II, water inlet pipes, water outlet pipes, a roller bed, transverse sliding tables, positioning cylinders, a supporting plate and lifting cylinders.

The present application discloses an on-line induction heating device for a wheel blank, consisting of a frame, a servo motor, guide posts I, guide sleeves I, a lower fixed plate, a lifting top plate, a bearing seat, a jacking cylinder, a piston connecting rod, a top cone, reset springs, radial positioning blocks, upper fixed plates, induction heating cylinders, connecting rods, double-head fastening nuts, fixed slide rails, mounting plates, outer protective jackets, induction coils, a displacement sensor I, a compression cylinder, a guide sleeve II, a guide post II, a gland, pressure sensors, asbestos, a displacement sensor II, water inlet pipes, water outlet pipes, a roller bed, transverse sliding tables, positioning cylinders, a supporting plate and lifting cylinders.

This disc rotor has a hat portion having a cylindrical portion and a sliding plate portion having an insertion hole into which the cylindrical portion is inserted, being connected together with the hat portion in a state in which the cylindrical portion protrudes from the insertion hole. The coupling is achieved by pinching an inner peripheral edge of the sliding plate portion between a first portion and a second portion that are formed in the cylindrical portion. The second portion is formed by plastically deforming an outer peripheral side of the cylindrical portion toward the first portion.

The invention relates to a method for forming a fastening collar. A fastening collar is formed to the end of the tubular piece by shaping the end of the tubular piece in a first step by means of a first rotatable shaping head and a counter-surface to a first angle, and in a second step by means of a second rotatable shaping head and a counter-surface to a second angle. The outermost end of a flange part shaped in the first step is shaped in the second step in such a manner that only part of the flange part formed in the first step is shaped into a support surface that is perpendicular to the longitudinal axis of the tubular piece.

The invention relates to a method for forming a fastening collar. A fastening collar is formed to the end of the tubular piece by shaping the end of the tubular piece in a first step by means of a first rotatable shaping head and a counter-surface to a first angle, and in a second step by means of a second rotatable shaping head and a counter-surface to a second angle. The outermost end of a flange part shaped in the first step is shaped in the second step in such a manner that only part of the flange part formed in the first step is shaped into a support surface that is perpendicular to the longitudinal axis of the tubular piece.