White iron rivet and its manufacturing process
A manufacturing process and rivet technology, which is applied in the field of white iron rivets and its manufacturing process, can solve problems such as short-circuit scrapping, product puncture, and insufficient gripping force, and achieve excellent gripping force, yield improvement, and the effect of solving short-circuits
Active Publication Date: 2019-11-29
昆山敏欣电子有限公司
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Problems solved by technology
The hardness of copper rivets is relatively soft, and the hardness is between 80HV-115HV. During the riveting process, the gripping force is not enough, and a large amount of chips are shed, which will lead to layer deviation and high short-circuit scrapping of the finished product after pressing, which cannot be solved, resulting in poor yield.
The hardness of stainless steel rivets is too hard, the hardness is between 180HV-230HV, it is easy to damage the flowering mold, and will produce more chips, resulting in high scrapping phenomena such as piercing copper foil, dents, steel plate deformation, and short circuit after pressing. , leading to poor yield
Method used
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[0022] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0023] For the convenience of description, spatially relative terms may be used here, such as "on ...", "over ...", "on the surface of ...", "above", etc., to describe the The spatial positional relationship between one device or feature shown and other devices or features. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, devices described as "above" or "above" other devices or configurations would then be oriented "beneath" or "above" the other devices or conf...
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Abstract
The invention discloses a galvanized iron rivet which comprises the following elements in percentage by mass: no less than 85% of Fe, 0.3-0.5% of Si, 2.4-3.2% of Cu, 1.2-1.8% of Mg, 0.1-0.2% of Zn, 0.15-0.25% of Mn, 0.1-0.3% of Ti, 0.01-0.03% of P, 0.01-0.05% of S and the balance of inevitable impurities. A manufacturing process of the above galvanized iron rivet comprises the following steps: material selection; acid pickling; phosphorization; cold drawing; recrystallization annealing; fine drawing; cold heading; and nickel plating or zinc plating.
Description
technical field [0001] The invention relates to the technical field of rivet processing and manufacturing, in particular to a white iron rivet and its manufacturing process. Background technique [0002] Rivets are one of the most commonly used fasteners for structural connections that are not expected to be disassembled. It is generally composed of two parts: the nail head and the nail shank. The end of the nail shank is the part that forms the riveted head. In order to facilitate the insertion of the rivet into the rivet hole, the end of the nail shank is generally designed to be rounded or chamfered. [0003] Some rivets are made of copper, and some are made of stainless steel. The PCB circuit board will be riveted when the laminate is pressed, and the rivet will directly remain in the board after pressing. The hardness of copper rivets is relatively soft, and the hardness is between 80HV-115HV. During the riveting process, the gripping force is not enough, and a large a...
Claims
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IPC IPC(8): C22C38/02C22C38/04C22C38/14C22C38/16C22C38/60C23C22/18C21D1/26C21D8/02C23C28/00F16B19/08
CPCC21D1/26C21D8/0273C22C38/002C22C38/02C22C38/04C22C38/14C22C38/16C22C38/60C23C22/182C23C28/322C23C28/3225C23C28/34F16B19/08
Inventor 庄召国
Owner 昆山敏欣电子有限公司