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1. Methods to prevent quenching cracks (1) Reasonably design the shape of parts. Try to use equal wall thickness design to avoid sudden changes in cross-sectional shape: ①Don’t make parts with large wall thicknesses into one piece, but use a mosaic structure so that each piece has the same strength as possible; ②The thick parts […]

In the production of aluminum alloy die-casting, the most common way of mold damage is cracks and cracks. Stress is the primary cause of mold damage. In the process of die casting production 1. Mold temperature The mold should be preheated to a certain temperature before production. Otherwise, chilling occurs when the high-temperature molten metal

1. Extrusion honing machine: used to fix the parts and fixtures in the specified position, and apply squeezing force to the grinding abrasive. The extrusion honing machine has two opposing abrasive cylinders. When closed, the parts or fixtures are clamped to squeeze the abrasives from one cylinder to the other. The constrained parts of the parts

A good blow moulded part starts from the design. The design of blow-moulded parts of plastic containers is the key to manufacturing competitive and high-quality containers. It is a systematic and comprehensive engineering plan. That is, first consider meeting the use function; then select the material and determine the blow moulding method (particularly pay attention to

Compared with machined gears, injection-moulded gears have almost nothing in common except for the use of involute conjugate to transmit motion. These two types of gears are essentially different. Machining gears are cut to a specified size on a special gear machine designed for specific processing tasks; injection-moulded gears are injection moulded in a gear

Gear injection moulding process Various injection moulding processes and injection moulding machinery are not the same. Gear injection moulding technology requires high accuracy and repeatability. Generally speaking, high-precision gears need to be made of new resin. But even if the new resin is used, the material must still have a suitable degree of dryness, its

Over the years, gear detection technology has been continuously improved to accurately measure most of the errors in gear cutting processes. Scanning measurement of involute tooth profile usually only detects a few teeth in a circle. Plastic gears are processed on gear machines such as hobbing and slotting, and the tooth profile of each tooth

Comparing the processing of high-precision parts with the requirements of general forming processing, it is necessary to pay attention to more details and the measurement technology required to reach the level of accurate measurement. This tool must ensure that the moulding temperature and cooling rate in the cavity of each moulding are the same. The most

With the development of the machining industry, there are more and more parts manufactured by cold work moulds in production, and more and more types of cold deformation moulds are used. Cold bulk die forging (cold heading, cold extrusion, embossing, etc.); sheet metal stamping (such as drawing, blanking, trimming, punching, etc.); material rolling (cold rolling,

Low-hardenability cold-deformed die steels are mainly carbon tool steels, especially high-carbon complex steels GCr15 and 9Cr2Mo. Among them, GCr15 bearing steel and 9Cr2Mo are used to make various forming wheels and cold rolls. GCr15 steel has good wear resistance, but poor hardenability and large quenching deformation. As a small cold roll (φ≤200m/m), it can be

The maintenance of standard parts of automobile molds is extremely meticulous work. Each damaged standard part of automobile molds needs careful maintenance and maintenance, so as to achieve our expected results and extend the service life of the mold. Punches and sleeves: most of the punches and sleeves used on the standard parts of automobile

Metal stamping die production process: Raw material processing: 1. Milling six face squares (perpendicularity error is not more than 0.1/300), the same mold material length and width dimensions can be the same, the thickness of 0.2mm grinding (requiring 0.5mm grinding of quenched parts); edge chamfer . 2. Grind the upper and lower planes (the workpiece