4results about How to "Controllable depth" patented technology

The angle cleaner comprises a shell and a tool bit, the tool bit is a cuboid, a triangular pyramid-shaped first groove body is formed in the top end of the tool bit, an L-shaped second groove body is formed in the lower end of the tool bit, a mounting groove corresponding to the tool bit is formed in the shell, the tool bit is connected to the shell in a telescopic mode, and the four faces of the upper end of the tool bit abut against the four walls in the mounting groove respectively. A spring is arranged between the first groove body and the top in the shell, the lower end of the tool bit extends out of the bottom of the shell, an opening corresponding to the lower end of the tool bit is formed in the bottom of the shell, a limiting part corresponding to the second groove body is arranged at the opening, and the top wall of the second groove body abuts against the limiting part to limit the stroke of the tool bit. The inner angle of the fixing groove can be cleaned quickly and conveniently, the arc-shaped angle of the fixing groove is processed to be a right angle, and the edge of a lock or a hinge is completely attached to the fixing groove.

The invention relates to the technical field of water electrolysis equipment, and discloses a polymer proton exchange membrane electrolysis device and an electrolytic bath with the same. The polymer proton exchange membrane electrolysis device comprises: a pair of conductive polar plates, at least one surface of which is a plane; the number of the flat plate diffusion layers is one pair, the pair of flat plate diffusion layers is arranged between the pair of conductive polar plates, overflowing runners are arranged between the flat plate diffusion layers and the conductive polar plates, and the overflowing runners between the adjacent flat plate diffusion layers and the conductive polar plates are formed on the faces, facing the conductive polar plates, of the flat plate diffusion layers or the faces, facing the flat plate diffusion layers, of the conductive polar plates; and the membrane electrode is arranged between the pair of flat diffusion layers. One surface or two surfaces of the conductive polar plate are planes, so that the forming step of the conductive polar plate is simplified, and the manufacturing cost of the conductive polar plate can be reduced. And at least one surface of the conductive polar plate is a plane without an overflowing runner, so that the planeness of the conductive polar plate can be improved.

The invention discloses a method for manufacturing lattice points of a glass light guide plate. The method comprises the following steps: (1) screen-printing ink on a first surface of a glass plate to obtain an ink layer; (2) punching on the first surface with the ink layer of the glass plate by using laser to obtain a plurality of first blind holes; (3) an ink layer on the surface of the glass plate is removed, then the glass plate is put into pure water to be cleaned, and glass powder and ink residues in the first blind holes are removed; and (4) etching the cleaned glass plate in a hydrofluoric acid solution to obtain a plurality of sunken lattice points. Since the ink layer can absorb part of energy of the laser, the central area with the maximum energy density in the laser spots can penetrate through the ink layer to form the concave holes in the first surface of the glass plate, so that the finally obtained concave lattice points are small in size, the lattice points cannot be directly seen by human eyes, a displayed picture is clearer, and the display effect is better. And the display light and shade contrast can be improved. The invention further discloses a glass light guide plate and a front light source assembly.

The application relates to the technical field of material crushing, in particular to a preparation method of a high-wear-resistance and high-toughness crusher blade and the obtained blade, and the preparation method comprises the following steps: blanking a steel billet into a steel block and forging the steel block into a circular ring, rough machining, quenching and tempering heat treatment and fine machining are performed on the upper and lower surfaces of the circular ring, so that the upper and lower surfaces of the circular ring are flat and have a hardness of HRC 28-32; an induction coil is prepared, the upper and lower surfaces of the circular ring are subjected to induction quenching treatment, so that the surface hardness of the circular ring reaches HRC 58-62; a plurality of teeth are machined in the circumferential direction of the circular ring to obtain a preform; a profiled coil is prepared, and the teeth are subjected to induction quenching treatment, so that the hardness of the side surfaces of the teeth reaches HRC 58-62; the preform is subjected to grinding and a spline hole or a hexagonal hole is machined to obtain the high-wear-resistance and high-toughness crusher blade; the application can obtain the crusher blade which has high surface hardness, high wear resistance, toughness in the core and does not break and fail when crushing hard objects.