Cutting dimensions of the head and quotation
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1. There is a concept of margin in the cutting dimensions for end caps; what is an appropriate amount for this margin? 2. Is the quote for the end cap based on the weight calculated from the cut dimensions, or is it based on the weight of the steel plate including the extra material? For example, the cutting size for the EHA head of DN800 is 1030 (with a margin of 20), leaving waste material 470 wide for a 1500 steel plate. Generally, when quoting at this time, should the supplier quote based on the weight of the steel plate at 1500*1030, or should it be quoted based on the price per square meter of the 1030 steel plate? 3. When transporting the head, by how much should the internal height of the packaging box exceed that of the head?
1. The cutting dimensions of the head are related to its thickness and diameter. There is a calculation formula; as long as the dimensions are sufficient, no margin is needed. 2、
2. The weight of the end cap can be determined. It’s useless even if you calculate too much. If it becomes too expensive, customers might leave. 3, 100mm.
This post was last edited by 000245 on 2018-4-24 at 11:25; it’s the margin mentioned in the formula!
The quotation is generally calculated based on square plates with the diameter of the material used as the side length for determining the costs. The 470 margin mentioned above is not taken into account in the quotation. End caps can be joined together; so isn’t the 470 margin unnecessary when the cutting size for EHA1500 is 1900?
Generally, the price for end caps is calculated based on the area of the flat plate in its unfolded state.
This post was last edited by wanlirn on 2018-5-9 at 14:52. Whether it is cold spinning or hot pressing, no margin is left in the actual manufacturing process; after shaping, there is definitely enough material for trimming. The figures in the books represent theoretical conservative values; when making a budget, it’s sufficient to add 20mm. Adding too much will increase the cost of mass production, and customers will then leave. These days, with end caps, the labor cost is accounted for but not the cost of materials, so there isn’t much profit left. For woolen materials, the four corners calculated as squares are discounted by half of the material cost. As you said, the width allowance cannot be included in the price of the raw material
The cutting allowance for the head is determined based on thickness and diameter, generally ranging from 30mm to 80mm. Guangdong Zhaoqing Jiqian Head Manufacturing Co., Ltd. 13560921619
Of course, the quote is based on the dimensions of the material to be used. You can use the raw material elsewhere or sell it; you need to include that in the quote, and as a result the price will be very high
For end caps with special specifications and materials that are requested by clients, you can include a higher weight calculation for them. If it’s a bidding process, it’s better to follow what everyone else does