Hose Crimping Machine Crimping Hose Method And Hose Hole Requirements

Time of issue:

2021-12-17

hose crimping machine crimping hose method and hose hole requirements Requirements for the hose hole of the hose crimping machine: 1. Confirm that there are enough holes and bridges to ensure that the expansion is firm and lasting. 2. The hole diameter after drilling or reaming should be 0.007 (0.18mm) ~ 0.010 (0.25mm) larger than the outer diameter of the pipe used. 3. When replacing the waste pipe in the slotted plate hole, please remove the metal residue and other impurities in the plate hole. 4. Slotting in the plate hole can improve the mechanical strength of the expansion. 5. If conditions permit, it is recommended to finish or roll the inside of the plate hole to achieve a higher surface finish. This can also improve the tensile strength of the hole bridge. In the processing of copper tube and aluminum fin convection radiator, what are mechanical shrinkage tubes, liquid compression tubes and interference? In order to ensure close contact between the copper tube and the aluminum heat sink during the production process of the radiator, the copper tube and the aluminum fin should be closely connected together. If you want to string copper pipes on aluminum sheets, the diameter of the copper pipes should be smaller than the inner diameter of the round holes of the aluminum sheets. After wearing, the following two methods can be used to tighten. (1) Liquid compression tube: The method is to string up the copper tube and aluminum sheet, weld all the header elbows, pass high-pressure liquid (such as water), and when the water pressure is increased to 1200-200kg/cm2, the copper tube is expanded by hydraulic pressure. Large, so that it is in close contact with the aluminum sheet. This method is simple in process, low in equipment cost, and easy to process. The disadvantage is that it is difficult to guarantee the expansion due to the unevenness of the copper tube wall thickness and the unevenness of the copper material state. In addition, it is difficult to achieve interference. (2) Mechanical crimp hose: Since the copper tube is in a soft state and the aluminum loose piece is in a hard state, use a mechanical hose crimping machine to force the alloy steel expansion head into the inner diameter of the copper tube with mechanical force, expand the copper tube by 30-40 wires, and shrink the tube The calculation of the amount includes the positive deviation of the outer diameter of the copper tube, the negative deviation of the inner diameter of the aluminum sheet hole, and the distance between the pipes. After Z, in order to ensure the tight coupling of the pipe, a certain amount of expansion is increased. This increased expansion is called the interference amount. The value of the interference must not only ensure the self-shrinkage of the copper tube after mechanical expansion, but also ensure that the tube and the sheet are tightly combined under the action of cold and hot water to reduce thermal resistance and ensure heat transfer. The mechanical crimping hose can accurately control the expansion, the product consistency is very high, and the effect is very good. It is an advanced technology commonly used all over the world. The disadvantage is that the crimping equipment is strict and the cost is relatively high.

hose crimping machine crimping hose method and hose hole requirements
Requirements for the hose hole of the hose crimping machine:

1. Confirm that there are enough holes and bridges to ensure that the expansion is firm and lasting.

2. The hole diameter after drilling or reaming should be 0.007 (0.18mm) ~ 0.010 (0.25mm) larger than the outer diameter of the pipe used.

3. When replacing the waste pipe in the slotted plate hole, please remove the metal residue and other impurities in the plate hole.

4. Slotting in the plate hole can improve the mechanical strength of the expansion.

5. If conditions permit, it is recommended to finish or roll the inside of the plate hole to achieve a higher surface finish. This can also improve the tensile strength of the hole bridge.

In the processing of copper tube and aluminum fin convection radiator, what are mechanical shrinkage tubes, liquid compression tubes and interference?

In order to ensure close contact between the copper tube and the aluminum heat sink during the production process of the radiator, the copper tube and the aluminum fin should be closely connected together. If you want to string copper pipes on aluminum sheets, the diameter of the copper pipes should be smaller than the inner diameter of the round holes of the aluminum sheets. After wearing, the following two methods can be used to tighten.

(1) Liquid compression tube:

The method is to string up the copper tube and aluminum sheet, weld all the header elbows, pass high-pressure liquid (such as water), and when the water pressure is increased to 1200-200kg/cm2, the copper tube is expanded by hydraulic pressure. Large, so that it is in close contact with the aluminum sheet.

This method is simple in process, low in equipment cost, and easy to process. The disadvantage is that it is difficult to guarantee the expansion due to the unevenness of the copper tube wall thickness and the unevenness of the copper material state. In addition, it is difficult to achieve interference.

(2) Mechanical crimp hose:

Since the copper tube is in a soft state and the aluminum loose piece is in a hard state, use a mechanical hose crimping machine to force the alloy steel expansion head into the inner diameter of the copper tube with mechanical force, expand the copper tube by 30-40 wires, and shrink the tube The calculation of the amount includes the positive deviation of the outer diameter of the copper tube, the negative deviation of the inner diameter of the aluminum sheet hole, and the distance between the pipes. After Z, in order to ensure the tight coupling of the pipe, a certain amount of expansion is increased. This increased expansion is called the interference amount. The value of the interference must not only ensure the self-shrinkage of the copper tube after mechanical expansion, but also ensure that the tube and the sheet are tightly combined under the action of cold and hot water to reduce thermal resistance and ensure heat transfer.

The mechanical crimping hose can accurately control the expansion, the product consistency is very high, and the effect is very good. It is an advanced technology commonly used all over the world. The disadvantage is that the crimping equipment is strict and the cost is relatively high.

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