A method for producing a flat spiral spring formed as an annular disk-shaped segment, wherein a strip-shaped material is supplied in a tangential alignment to the lateral surface of the drum such that a lateral wall which determines the thickness of the strip-shaped material rests against some sections of a contact surface on the lateral surface of the drum. The contact surface of the drum has a radius which substantially corresponds to an internal radius of the strip-shaped material, and at least one deflecting device is aligned at a distance to the drum such that the strip-shaped material is guided in a forced manner between the drum and the deflecting device, and the strip-shaped material is bent so as to follow the drum by means of the deflecting device.

A method of stacking wave winding wires (wires) for forming a winding mat for a stator coil winding including providing a drop magazine containing a plurality of similar wires in a receiving space, wherein a receiving space contour is configured to the received wires, such that the wires are positioned at a plurality of guide devices at different receiving space boundary locations and guided through the receiving space without changing their geometry, positioning a workpiece carrier having a retaining structure for a winding mat formed of multiple stacked wires in a first transfer position below the magazine and depositing a wire from the magazine at a first position on the workpiece carrier, positioning the workpiece carrier in a second transfer position offset from the first transfer position below the magazine, and depositing a further wire from the magazine at a position offset from the first position on the workpiece carrier.

A method of stacking wave winding wires (wires) for forming a winding mat for a stator coil winding including providing a drop magazine containing a plurality of similar wires in a receiving space, wherein a receiving space contour is configured to the received wires, such that the wires are positioned at a plurality of guide devices at different receiving space boundary locations and guided through the receiving space without changing their geometry, positioning a workpiece carrier having a retaining structure for a winding mat formed of multiple stacked wires in a first transfer position below the magazine and depositing a wire from the magazine at a first position on the workpiece carrier, positioning the workpiece carrier in a second transfer position offset from the first transfer position below the magazine, and depositing a further wire from the magazine at a position offset from the first position on the workpiece carrier.

The present invention discloses a manufacturing method of an unequal-torque coil spring and a manufacturing machine thereof for a curtain spring motor, providing a feedback torque that corresponds to an actual requirement from different stages in a curtain-folding working process, so that when the curtain is folded back, the torque can be used to stabilize the speed of folding back the curtain, and the lower beam of the curtain can be fixed at any heights as the curtain is lowered.

Method for press-rolling a mainspring, from a wire comprising a pre-formed eye, utilizing a roller press comprising a first support and guide means exerting a force on the wire in a first contact area located between a second and a third contact area comprised in a second and a third support and guide means, in order to wind, beyond the eye, an accumulation area with an opposite curvature to that of the eye, and wherein, as the wire advances, the position of the first contact area is gradually moved away from the second and third contact areas, to vary the press-rolling radius from a first minimum value to a second maximum value at a neck junction between the accumulation area and the eye.

Method for press-rolling a mainspring, from a wire comprising a pre-formed eye, utilizing a roller press comprising a first support and guide means exerting a force on the wire in a first contact area located between a second and a third contact area comprised in a second and a third support and guide means, in order to wind, beyond the eye, an accumulation area with an opposite curvature to that of the eye, and wherein, as the wire advances, the position of the first contact area is gradually moved away from the second and third contact areas, to vary the press-rolling radius from a first minimum value to a second maximum value at a neck junction between the accumulation area and the eye.

The present disclosure generally relates to a pre-tightening disc spring, comprising a disc-shaped body which is integrally formed, the disc-shaped body being formed with a central hole, the disc-shaped body having a first contact side and a second contact side which are opposite to each other in a thickness direction of the disc-shaped body, the disc-shaped body being a rotation solid formed by rotating a radial section about a central rotation axis by 360 degrees, the central rotation axis coinciding with a central axis of the central hole, the radial section having a first line segment and an opposing second line segment, the first contact side being defined by rotating the first line segment, the second contact side being defined by rotating the second line segment, a medium-diameter axis being defined to passing a mid-point of the second line segment and extending normally relative to the second line segment, the radial section being mirror-symmetrical relative to the medium-diameter axis, the medium-diameter axis being non-parallel to the central rotation axis, the first line segment being curve-shaped, the notch of the curve shape being oriented towards the mid-point of the second line segment, a point of intersection of the medium-diameter axis and the first line segment being a point such that a vertical distance measured from this point to a straight line segment connecting between both terminals of the second line segment is the greatest one among vertical distances measured from all points in the first line segment to the same straight line segment, wherein in a free state of the pre-tightening disc spring, the minimum thickness between the first and second contact sides of the disc-shaped body is greater than ? of a free height of the disc-shaped body and greater than 1/12 of a free outer diameter of the disc-shaped body.

The present disclosure generally relates to a pre-tightening disc spring, comprising a disc-shaped body which is integrally formed, the disc-shaped body being formed with a central hole, the disc-shaped body having a first contact side and a second contact side which are opposite to each other in a thickness direction of the disc-shaped body, the disc-shaped body being a rotation solid formed by rotating a radial section about a central rotation axis by 360 degrees, the central rotation axis coinciding with a central axis of the central hole, the radial section having a first line segment and an opposing second line segment, the first contact side being defined by rotating the first line segment, the second contact side being defined by rotating the second line segment, a medium-diameter axis being defined to passing a mid-point of the second line segment and extending normally relative to the second line segment, the radial section being mirror-symmetrical relative to the medium-diameter axis, the medium-diameter axis being non-parallel to the central rotation axis, the first line segment being curve-shaped, the notch of the curve shape being oriented towards the mid-point of the second line segment, a point of intersection of the medium-diameter axis and the first line segment being a point such that a vertical distance measured from this point to a straight line segment connecting between both terminals of the second line segment is the greatest one among vertical distances measured from all points in the first line segment to the same straight line segment, wherein in a free state of the pre-tightening disc spring, the minimum thickness between the first and second contact sides of the disc-shaped body is greater than ? of a free height of the disc-shaped body and greater than 1/12 of a free outer diameter of the disc-shaped body.

A heating coil production system for producing heating coils for electronic vaporizers includes a conductor that has a first end and a second end. An anchor is provided and the anchor is selectively positioned on a support surface. The second end of the conductor is removably coupled to the anchor. A rotation unit is provided and the rotation unit is selectively positioned on the support surface and the rotation unit is selectively turned on and off. The first end of the conductor is selectively coupled to the rotation unit and the rotation unit twists the conductor into a coil when the rotation unit is turned on. The resulting coil is positioned in an electronic smoking device for a heating element.

A heating coil production system for producing heating coils for electronic vaporizers includes a conductor that has a first end and a second end. An anchor is provided and the anchor is selectively positioned on a support surface. The second end of the conductor is removably coupled to the anchor. A rotation unit is provided and the rotation unit is selectively positioned on the support surface and the rotation unit is selectively turned on and off. The first end of the conductor is selectively coupled to the rotation unit and the rotation unit twists the conductor into a coil when the rotation unit is turned on. The resulting coil is positioned in an electronic smoking device for a heating element.