35results about How to "Solve the problem of difficult alignment" patented technology

An electronic device includes a flexible circuit board and a circuit board connected with it, which has two first weld parts, one multifunction open-end and a second positioning part. The first weld parts are parallel strips and in a line, the multifunction open-end is a strip having an anti-spill Sn part and a first positioning part. The anti-spill Sn part is set between the first weld parts and in a same length with them, the first part is connected with the first end of the anti-spill Sn part, said second part is set on the extension line of the multifunction open-end length direction and in a gap with its second end of the Sn part.

The invention discloses a lifting device with a slidable and tiltable bracket, which includes a slewing bracket, a drive cylinder and a first lug, the lower end of the slewing bracket is hinged to the first support, and the drive cylinder The lower end is hinged to the second support, and the upper ends of the slewing bracket and the drive cylinder are both hinged to the first lug on which a bracket is slidably mounted. Its purpose is to provide a lifting device with a slidable and tiltable bracket, which can lift the erecting cylinder conveniently and quickly, and solve the problem of difficulty in aligning the erecting cylinder with the pin hole of the launch tube. Reduce labor intensity, improve efficiency, and significantly improve safety during operation.

The invention relates to a coal cutter hollow shaft machining method. The coal cutter hollow shaft machining method comprises the following machining steps that a coal cutter hollow shaft initial baris got to be machined into a spline small-diameter through hole, and a centre hole semi-finished product is machined; the left and right ends are subject to rough turning; taper faces are subject turning trimming; u-turning is carried out, one end is clamped by a chuck, the other end is fixed through a center support of a lathe, a center hole in the other end is formed through turning, and the taper face is formed through trimming; the left and right ends are subject to semi-finish turning; one end is clamped by the chuck, the other end is ejected by the center support, spline small diameter is formed through drilling, and spline end face angles are chamfered; a mandrel is installed, an iron core stopping part is subject to finish turning, and the left and right end are subject to finish turning; seventhly, the installed mandrel is hit to be tight, the right end and the left end are subject to finish turning, a hollow shaft of the inner taper face is matched with the grinding centre tobe installed on a grinding machine, and the hollow shaft is subject to grinding treatment. The invention further provides a grinding centre used for grinding the hollow shaft. By means of the methodand the grinding centre, coal cutter hollow shaft grinding operation can be conveniently and accurately carried out.