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How thick should the cast iron platform be?

Related tags: cast iron platform, thick

When many customers come to our company to buy a cast iron platform , I don't know what specifications to buy in order to keep their workpieces on the platform without deformation. Others will be asked the question: How thick is the cast iron platform you want to buy? And this has a direct relationship with the price and later use, so customers must be clear according to their own characteristics before buying is better.

In fact, this thickness has several aspects for the cast iron platform . One is the thickness of the surface of the cast iron platform, the other is the thickness of the side, and the thickness of the rib is further detailed. And what is the relationship between them? What will be affected for cast iron platforms? How should the platform's weighing capacity be calculated?

The following new editors will solve your doubts:

I. Thickness of cast iron platform

When choosing a cast iron platform, the first thing to look at is the plate thickness of the platform. The thickness of the casting panel is not easy to be too thin, and the working surface is the place where the most contact is in use. For example, when using a cast iron welding platform in welding, it is inevitable to strike. The intensity of the strike makes it impossible to use the panel of the welding platform that is too thin. The working surface should be reasonably designed with a certain thickness according to the load bearing, accuracy, slotting, etc. The thickness of the working table is the most critical. It is necessary to ensure that the use effect is not too thick, that is, to achieve the highest cost performance;

The high cost performance also involves the enclosure and ribs. The enclosure is the side wall thickness of the cast iron platform. It plays a supporting role in use. The thickness and height are closely related to the platform's supporting capacity. The reinforcing ribs play the role of stretching. Designed to match the height and thickness of the ribs, the height of the ribs is usually half, full and flat.

Second, the wall thickness of the cast iron platform

When the casting wall thickness is too thin, defects such as insufficient casting and cold insulation will occur. Usually under certain casting conditions, each casting alloy has a minimum wall thickness that can fill the mold, commonly known as the minimum wall thickness of the casting alloy. When designing the casting, the design wall thickness of the casting shall be not less than the minimum wall thickness.

1. Reasonable wall thickness in the design of the cast iron platform. Gray cast iron has a suitable platform casting wall thickness under the specified casting method. It can not only ensure the mechanical properties of the cast iron platform, but also prevent the casting defects of the cast iron flat plate.

2. Under certain casting conditions, the minimum wall thickness of the cast iron platform castings that can be cast by gray cast iron of different materials is different. When the designed wall thickness is less than the minimum wall thickness of the cast iron platform, cast iron platform castings are prone to defects such as insufficient casting and cold insulation.

3. The wall thickness of the cast iron platform increases proportionally. On the same cast iron platform, the thickness of the inner wall should be smaller than the thickness of the outer wall, and the thickness of the ribs should be smaller than the connecting wall, so that the cooling rate of each part of the wall is uniform.

4. When the cast iron slab bears a large load and requires high strength and rigidity, according to the nature and size of the load, reinforcing ribs can be placed in weak places. To avoid thick and large sections.

5. The wall thickness of the cast iron platform should be as uniform as possible. If the wall thickness of each part of the cast iron table differs too much, the metal accumulates in the thick wall. When the solidification shrinks, it is easy to produce shrinkage and shrinkage at the hot joint.

Third, cast iron platform ribs

According to its structure, the cast iron platform is divided into ribbed plate type and box type. Reasonably designed thickness, height and number of trips play an important role in ensuring the accuracy of the cast iron platform. The stiffener can improve the structural strength of the cast iron platform, which is helpful to prevent it from cracking due to too much internal stress; and because the body uses cast steel material, the strength of the cast iron mold against thermal expansion and contraction is increased, and even if cracking occurs, it is easy The cracks are repaired by welding so that they can be reused and the service life is greatly extended.

It can be seen that the bottom plate and ribs of the cast iron platform are designed to increase the stability of the cast iron platform.

The interior of the cast-iron platform slab must be designed with reinforcing ribs. The cast-iron mold used for the cast-iron platform includes several reinforcing ribs. The reinforcing ribs are respectively located at the bottom of the body corresponding to the bottom end of the casting trough. The distance is 500mm. If the size of the cast iron platform is small, it can also be designed according to the actual situation.

The general stiffener thickness depends on the cast iron process and wall thickness. If many ribs are used for reinforcement, the thickness of the ribs must be designed appropriately. The thickness of the stiffener shall not exceed 50% of the thickness of its adjacent wall. Experience tells us that in violation of the above guidelines, uneven gloss may appear on the surface. Stiffeners can increase the impact strength of the product and use the most economical cost to achieve effective results. Poor design results in shrinkage marks on the surface and undesired impact strength.

The design of the cast iron platform ribs is also related to the cast iron material used. From a production perspective, the physical properties of cast-iron platform materials such as viscosity and shrinkage have a significant impact on the design of the stiffeners. In addition, the creep properties of cast iron are also an important consideration from a structural perspective.

Fourth, calculating the load bearing method of cast iron platform

The bearing capacity of a cast iron platform refers to the degree of deformation after the weight per unit area of the cast iron platform. Generally, we can think of the pressure that can be withstood by placing a workpiece on a cast iron platform without affecting normal use. Measure the thickness of the working surface of a cast iron platform and its structure. Generally, the bearing capacity of the platform is calculated according to the thickness of the working surface mm * 1000. The method of extending the service life of the cast iron platform must also be used reasonably, thereby greatly reducing the enterprise's capital investment in tools. The bearing capacity is also closely related to its actual design and actual processing production. Load bearing, length, width, height, surface accuracy, weight, material and other requirements. All must meet the requirements of the People's Republic of China Machinery Industry Standard JB / T7974-2001 for cast iron platforms.


From the introduction above, we can see that when buying a cast iron platform, you can't just care about the price of the cast iron platform and ignore the quality of the cast iron platform. In addition to the above points, what aspects need to be paid attention to when choosing a good-quality cast iron platform?


First, the accuracy of the cast iron platform .

The main factor affecting the normal use of cast iron slabs is the surface accuracy of the slabs. Good-quality cast iron slabs have a uniform surface scraping process, dense surface scraping process, and a flat surface. Reach 25 capsules.


Second, the appearance of the cast iron platform .

The first thing customers see when they buy cast iron slabs is the appearance of the flat slabs. Good cast iron slabs are well-made with no bumps or scratches. It is also important to observe the bottom of the slab. The bottom of a good slab is clear and clean, without obvious sand particles.


Third, the weight of the cast iron platform .

Good cast iron slabs will be very heavy. Many manufacturers now reduce the weight of slabs in order to reduce the cost of manufacturing the nameplates and achieve cost-saving quality. Light-weight slabs have a low service life and unstable accuracy, and may severely break during shipment. Therefore, the editor here reminds our customers to choose some heavy-duty cast iron plates when buying a good plate.


Fourth, the price of cast iron platforms .

That's right, Xiaobian refers to the price of cast iron slabs. The so-called one price is one cent. If you want to buy a good cast iron slab, the price will definitely be higher.




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