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Riveting is divided into pull riveting, pressure riveting, rotary riveting, self-punching riveting, riveting without rivets, etc., the tools required for pressing riveting are generally pressing riveting machines or large pressing riveting equipment, the following is the definition of pressing riveting and how to press riveting process quality control.
What is pressure riveting? The so-called pressure riveting refers to the plastic deformation of the body material caused by the pressure riveting part under external pressure during the riveting process, and it is squeezed into the special prefabricated slot in the riveting screw and nut structure, so as to realize the reliable connection of the two parts. Ordinary low carbon steel, aluminum alloy plate, copper plate plate is suitable for pressing riveted nut column, for stainless steel and high carbon steel plate because the material is harder, the need for special high strength riveted nut column, so the sheet metal parts with riveted nut column and riveted nut as far as possible do not use stainless steel.
There are two kinds of non-standard nuts, one is the nut column and the other is the nut. This form of riveting is used to achieve the connection with the substrate, and this form of riveting usually requires the hardness of the riveted part to be greater than the hardness of the substrate.
1, pressure riveting process how to carry out quality control 1, pressure riveting process processing content: pressure riveting nuts, screws, studs and custom hardware riveting parts (guide pins, positioning support columns, etc.), electrostatic hand bowl seat, pressure riveting wrench;
2. For riveting parts that are close to the edge of the product or the periphery of the hole, the edge or the periphery of the hole will be significantly deformed after riveting, and corresponding measures (such as shape correction/or grinding) will be taken according to the deformation and expansion of the material to meet the size and appearance requirements of the drawing.
3, after the pressure riveting shall not appear pressure distortion, pressure deviation phenomenon, must ensure that the thread and its corresponding hole is concentric.
4, the material, specifications and models of the riveting parts must be consistent with the drawings, and the wrong specifications must not be pressed;
5, after the pressure riveting, the riveting parts shall not be convex or concave around the obvious deformation, there shall be no obvious surface treatment can not cover the impression or impression.
6, after the pressing riveting shall not tilt the pressing riveting parts shall not be loose, fall off, must test its firmness; The pushing force and torque value must meet the PEM requirements of its specifications for riveting parts.
7. Before pressing riveting, it is necessary to confirm in time whether the external identification of the pressing riveting parts used in the production line and the physical objects (materials, specifications and models) in the packaging bag meet the requirements of the drawings, and whether there is mixing phenomenon in the packaging bag.
8, for the bending edge or mold forming edge closer to the riveted parts to pay attention to, especially the thread, appearance (deformation) to focus on detection.
9. After pressing, random sampling inspection is carried out on the material, specifications and threads of the pressing parts on the product to check whether they meet the requirements of the drawing, whether there is leakage pressure, mispressure, wrong position pressure, pressure mixing and other phenomena.
10, the screw thread of the pressed riveting part must be qualified, pass the regulation, stop the regulation.
What is pressure riveting? The so-called pressure riveting refers to the plastic deformation of the body material caused by the pressure riveting part under external pressure during the riveting process, and it is squeezed into the special prefabricated slot in the riveting screw and nut structure, so as to realize the reliable connection of the two parts. Ordinary low carbon steel, aluminum alloy plate, copper plate plate is suitable for pressing riveted nut column, for stainless steel and high carbon steel plate because the material is harder, the need for special high strength riveted nut column, so the sheet metal parts with riveted nut column and riveted nut as far as possible do not use stainless steel.
There are two kinds of non-standard nuts, one is the nut column and the other is the nut. This form of riveting is used to achieve the connection with the substrate, and this form of riveting usually requires the hardness of the riveted part to be greater than the hardness of the substrate.
1, pressure riveting process how to carry out quality control 1, pressure riveting process processing content: pressure riveting nuts, screws, studs and custom hardware riveting parts (guide pins, positioning support columns, etc.), electrostatic hand bowl seat, pressure riveting wrench;
2. For riveting parts that are close to the edge of the product or the periphery of the hole, the edge or the periphery of the hole will be significantly deformed after riveting, and corresponding measures (such as shape correction/or grinding) will be taken according to the deformation and expansion of the material to meet the size and appearance requirements of the drawing.
3, after the pressure riveting shall not appear pressure distortion, pressure deviation phenomenon, must ensure that the thread and its corresponding hole is concentric.
4, the material, specifications and models of the riveting parts must be consistent with the drawings, and the wrong specifications must not be pressed;
5, after the pressure riveting, the riveting parts shall not be convex or concave around the obvious deformation, there shall be no obvious surface treatment can not cover the impression or impression.
6, after the pressing riveting shall not tilt the pressing riveting parts shall not be loose, fall off, must test its firmness; The pushing force and torque value must meet the PEM requirements of its specifications for riveting parts.
7. Before pressing riveting, it is necessary to confirm in time whether the external identification of the pressing riveting parts used in the production line and the physical objects (materials, specifications and models) in the packaging bag meet the requirements of the drawings, and whether there is mixing phenomenon in the packaging bag.
8, for the bending edge or mold forming edge closer to the riveted parts to pay attention to, especially the thread, appearance (deformation) to focus on detection.
9. After pressing, random sampling inspection is carried out on the material, specifications and threads of the pressing parts on the product to check whether they meet the requirements of the drawing, whether there is leakage pressure, mispressure, wrong position pressure, pressure mixing and other phenomena.
10, the screw thread of the pressed riveting part must be qualified, pass the regulation, stop the regulation.
