1. The models, specifications and functions of hardware accessories used in the processing of metal stamping parts should conform to the current national standards and relevant regulations, and match the selection of plastic steel doors and windows.

    2. For sliding windows with a width of more than 1 meter, or double-glazed doors and windows, double pulleys or movable elastic pulleys should be installed.

    3. The sliding hinge shall not be made of aluminum alloy, but shall be of stainless steel.

    4. Hardware fittings should be installed last, and door and window locks, handles, etc. should be assembled after the window and door leaves are in the frame to ensure accurate position and flexible switching.

    5. To install hardware with fastening screws, a metal liner must be installed inside, and the thickness of the liner should be at least twice the pitch of the fastener. It must not be fastened to plastic profiles, and non-metallic linings must not be used.

    Automobile stamping parts have a rich variety of products and complex shapes. During stamping production, some undesirable phenomena often occur. How to avoid problems?

    The middle protective surface bracket is the key load-bearing connection of the integral instrument panel assembly of the automobile cab, and is an important part to ensure the stable and reliable use of various automobile instruments. In addition, if the part exceeds the allowable stress during forming, or the microcracks expand to a certain extent, causing tearing or skew, this will not only waste material, but also put the mold in eccentric load operation. Mold aging, measures to prevent damage to metal stamping parts.

    The punching process of the middle protective surface bracket is: blanking and punching-punching incision-flanging forming-incision-flanging. There are various forms of tearing and skew during the forming process of the middle protective surface bracket. The tearing parts are mainly distributed at the hole pattern of the workpiece, and the R arc at the corner of the side wall and the junction of the wall neck, etc., due to the forming of the stamping parts The production process conditions are different, and the proportion of each broken part is different. The tear can be a one-time forming tear or a tear caused by the development of fatigue cracks, that is, invisible cracks.