Unfound noun machining and casting equipment .

Machining refers to the process of changing the dimensions or properties of a workpiece through a mechanical device. According to the difference in processing methods, hot processing and cold processing can be divided into cutting processing and pressure processing. Common types of heat work include heat treatment, forcination, casting, and welding.

The principle of the enterprise is "addition for quality, multiplication for quantity", and a small drill sleeve is the most common substance in machining.

The technical term for punching knives in machining is called "forging". Forging the steel after it is burned red is not only forming, but also can break the coarse particles of the internal structure of the steel, making its internal structure more dense and with better performance. Some important parts, such as crankshafts, important gears and other workpieces that carry complex loads, need to be forged.

There should be no technical terminology for this, I call it Knife Crash.

It's generally called a knife and I've never heard of anything else.

Knife fighting should be the saying in the Northeast, hit the knife.

Agree with the opinion of the 4th floor, called Honken or Honken.

Casting belongs to the manufacturing industry. Machining is to process and transform on the basis of blanks, etc., and turn them into usable products or spare parts.

Generally, it is forged after the casting is completed, and it is machined after forging. . . Machining in the traditional sense generally refers to turning, grinding, planing, milling, drilling, expanding, reaming, boring... There are many new manufacturing methods, such as plasma, ultrasonic, and so on.

No, it's a pre-machining process.

The machining allowance is generally not determined by looking up the table. It's mostly decided based on your craft.

For example, the finishing allowance is determined by the best permissible conditions for finishing.

The machining allowance after heat treatment is determined by the amount of deformation after hot working and the requirements of mechanical properties after hot work.

Machining is the method of removing materials to obtain the size, shape, and accuracy requirements of parts. Generally, it is tool cutting. Forging and casting are mainly used to obtain parts by non-removing materials.

Forging is a method of obtaining parts by applying pressure or striking to a metal in a solid state to make it plastically deformed. Materials with low strength and good plasticity are suitable for forging.

Casting is a method in which metal is heated and melted, cast into a mold cavity (casting mold) of a certain shape, and cooled to obtain a part. Materials with good fluidity, small shrinkage and small segregation are suitable for casting.

If the casting is the blank casting of the machinery factory, it belongs to the machinery industry, and if it is the molten steel forming casting of the steel plant, it belongs to the metallurgical industry. Foundry industry, folk handicraft industry. The most developed foundry industry is Foshan, and the division of labor is fine, and the rules are strict.

Brother, listen to me to answer for you, casting according to the "National Economic Industry Classification" GBT4754-2011, belongs to the manufacturing industry - ferrous metal smelting and rolling processing industry - ferrous metal casting industry **3130;or manufacturing - non-ferrous metal smelting and rolling processing industry - non-ferrous metal casting industry**3250;

Ferrous metals refer to the three metals of iron, chromium and manganese, and non-ferrous metals refer to all metals except ferrous metals.

Note: It does not belong to the machinery manufacturing industry, because there is no machinery manufacturing industry, China's standardization law was announced in 1988 and implemented in 1989, and is still in use, and the industry standards have been classified as JB, YB, YS, and so on since then, in fact, according to the refinement of the industry, the classification of these standards needs to be updated, even if it is not updated, we also know in our hearts (according to GBT4754-2011) what industry the work is engaged in, JB: Machinery industry standard, what is the machinery industry, I personally think it only represents a name.

In addition, GBT4754-2011 is a recommended standard, and the state is so recommended, so let's understand it.

What industry does steel casting belong to? --Rough casting in machinery factory, which belongs to the machinery industry;

--Molten steel forming casting (continuous casting machine) in iron and steel mills, which belongs to the metallurgical industry.

Casting belongs to the machinery industry, providing blanks for the machinery industry, etc., belongs to the category of hot processing, as for hanging materials, it is purely far-fetched.

Normally, it can be considered to belong to the machinery manufacturing industry, but now it is leaning on the materials industry! Say anything!

When machining, the datum must first be processed, and then the datum plane is in contact with the workbench before the parts that need to be processed can be processed. Therefore, it is necessary to leave a machining allowance. On regular drawings, you can see which surface is the datum from the dimension marking.

In this diagram, the yellow surface is the surface to be machined, and the opposite surface is the datum plane.

This kind of casting should leave 6 8mm machining allowance on each side.

When milling, the bottom surface is used as a datum (and machined first).

Machining dead ends.

For example, the steps in turning need an inclination angle, but the turning tools (especially CNC turning tools) have rounded corners and cannot make straight sharp corners, which can be called machining dead angles. There are also some lead cutters that can't reach Hongchan's Huai Nai place, which is also called the processing dead end. There are many such examples.

The key is how about the casting level, the level is high, according to experience, the shape to be processed increases by 5-10 mm, and the inner hole is reduced by 5-10 mm, for example, the size of the processed inner hole is 80, and the inner hole is cast to 70.

If the technology is average, 5 mm is enough, I once looked for a OnePlus foundry, because of the good technology, I only put 3 mm.

The Foundry Process Manual has a detailed explanation, but of course that's the theory.

I think it mainly depends on the product and the technical strength of the foundry.

Our previous cylinders were cast steel, the product is relatively large, and the external size we want to process is generally 12, the small holes are full, and the large holes are 5-10Of course, the cold shrinkage coefficient of molten steel should also be taken into account.

These are selected according to the size of the parts and the national standard, it is recommended that you find this mechanical design manual to consult.