size of the hole should be at least the radius of the curl, plus material thickness from the curl feature. 3D CAD files are converted into machine code, which controls a machine to precisely cut and form the sheets into the final part. When T<0.8mm, the wall thickness of the flange is usually 0.3mm. Ordinary low carbon steel, aluminum alloy plate and copper plate are suitable for crimping the self-clinching standoff. When the hardness of the substrate is appropriate, the riveting quality is good, and the force of the riveting member is good. It basically able to meet the needs of sample blanking production. Hems are most often used to remove a sharp untreated edge and make it safe for handling. Sheet metal parts are known for their durability, which makes them great for end use. Bends that are in the same plane need to be designed in the same direction to avoid part re orientation, to save both money and time. Advantages: the flange is matched with the straight hole, and it has the positioning function itself. Besides, the processing efficiency is high, and the maintenance cost of the mold is convenient for maintenance. Mainly used for various deep drawing and bending force parts, its conductivity is not as good as copper, but it has better strength and hardness, and the price is relatively moderate. Take the counterbore as an example, as shown in Figure 1-16. Design considerations are a matter of experience, one achieves after designing, failing and succeeding of parts. Table 1-5 Minimum size for punching with a common punch. Advantages of lasercutting over cutting mechanically include better workholding, reduced workpiece contamination, better precision and reduced chance of warping as the heat affected zone is small. When the anchor riveting or self-clinching riveting is too close to the edge, it is easy to deform this part. It has high electrical and thermal conductivity, good corrosion resistance and formability. There are many factors affecting the quality of riveting. Countersunk head and via for countersunk screws: (Selected sheet thickness t is preferably greater than h), Table 1-23 Dimensions of screw counterbore, Table 1-24 Dimensions of Counterbore Holes for Hole Countersunk Rivets. In the case of meeting the electrical conductivity requirements, brass H62 instead of copper is used as much as possible, which can greatly reduce the material cost. The pressed dead edge is generally applied to stainless steel, galvanized sheet, and aluminum-zinc plate. Figure 1-53 Symmetrical structure of the rib, Figure 1-54 Example of curved part labeling. Sir as freelance metallurgical consulting team for alloy and special steels production by mini steel plants, our team is immensely benefited and our team advice entrepreneurs to be in touch with for metal working machines, Regards from Srikumar Chakraborty, Kolkata, India. This mold step height can be adjusted by adding a spacer. The corrosion resistance of the aluminum-zinc plate is derived from the barrier function of aluminum and the sacrificial protection of zinc. Attention : generally only used for steel plates. CNC punching generally cannot achieve piercing and blanking with too complicated shapes. This hexagonal hole is the common size of the company’s hexagonal hole, accounting for more than 90% of the hexagonal hole. The basic principle of forming is shown in Figure 1-19: The form of the bending knives is shown in Figure 1-20. Stainless steel materials are generally not processed by NCT. What this means is that if the material thickness is doubled the tonnage required increases 4 fold. When the circular flangeless tensile parts is formed at one time, the ratio of the height H to the diameter d should be less than or equal to 0.4. a) After the punching and bending, the L dimension accuracy is easy to ensure and the processing is convenient. You need to have a general understanding of the existing bending die during the structural design process. The connection to the substrate is achieved using such a riveted form. However, in many designs, the size of the pre-hole is not in accordance with the standard and cannot be accurately positioned. 3) Completion to the design size after bending at the edge of the hole near the bend line. the cost of; The size of the same type of hole should be the same. We will keep updating valuable articles like this, so stay turned. This site uses the Lucky Orange analytics system to help improve usability and the customer experience. and is greater than 0.25, but cannot exceed 0.50. Therefore, the height H is arbitrarily adjusted. Generally, the processing tool has a large number of bending knives.

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