Hole flanging die structure and stamping method

Abstract

The invention provides a hole flanging die structure and a stamping method. The hole flanging die structure is used for stamping and hole flanging of a tubular structure, and comprises a lower die board, a first mandrel fixed to the lower die board, and a second mandrel provided with a second expansion face, the first mandrel is suitable for being sleeved with the tubular structure and provided with a groove corresponding to a punch of a stamping structure, and a first expansion face, and after the second mandrel is inserted into the tubular structure, the second expansion face and the first expansion face are in expansion fit, so that the side walls of two sides of the groove of the first mandrel are tightly attached to the inner wall of the tubular structure. The hole flanging die structure not only ensures tight attachment with the tubular structure during hole flanging, but also ensures the effect that the tubular structure can be smoothly taken down after hole flanging is finished, and machined flanging holes are good in straight wall flatness, good in appearance quality and high in quality.

Description

technical field

[0001] The invention relates to the technical field of collecting pipe processing, in particular to a punching die structure and a stamping method. Background technique

[0002] The header in the air conditioner is one of the four important components of the refrigeration system. Fluorine is compressed by the compressor to produce high-temperature and high-pressure gas, which turns into a low-temperature and high-pressure liquid after cooling and condensing through the condenser, and enters the header for collecting And shunt, because it has high heat exchange efficiency and extremely low energy loss, it is widely used.

[0003] Its shape is a thin-walled straight-through round tube made of hard aluminum alloy. On the highest point of the cross section, a number of long flanging holes are evenly distributed along the length direction. The flat tube must be firmly fixed in the hole to closely match it and ensure good sealing. The conventional stamping structu...

Examples

Embodiment 1

[0061] Such as figure 1 -7 shows a specific embodiment of a hole turning mold structure, including a lower template 2 , a first mandrel 3 and a second mandrel 4 . The first end of the first mandrel 3 is fixed on the fixed block 5, the second end of the first mandrel 3 is suspended, and the lower template 2 is equipped with a fixed block matching the shape of the fixed block 5. Cavity, the fixed block 5 is installed in the fixed block installation cavity and fixed by inserting a pin, the lower template 2 is provided with a support groove 8, and the length direction of the support groove 8 is parallel to the length direction of the first mandrel 3 Setting, in this embodiment, the surface of the support groove 8 is an arc-shaped groove that matches the shape of the lower surface of the round tube 10, and the round tube 10 is sleeved behind the first mandrel 3 to connect with the support The bottom of the groove 8 is in contact. The first mandrel 3 is provided with a groove 31 c...

Embodiment 2

[0071] This embodiment provides a punching method, using the punching die structure provided in Embodiment 1 to punch and punch a tubular structure, including the following steps:

[0072] In the installation step of the tubular structure, the tubular structure is sleeved on the outside of the fixed first mandrel 3 and supported by the lower formwork 2; the second mandrel 4 is inserted into the tubular structure so that the second expansion of the second mandrel 4 The surface cooperates with the first expansion surface of the first mandrel 3, so that the side walls on both sides of the groove 31 of the first mandrel 3 closely fit the inner wall of the tubular structure;

[0073] In the stamping step, the punch 1 of the stamping structure moves downward, the punch 1 passes through the tubular structure and forms a flanging hole on the tubular structure and is supported by the groove 31 of the first mandrel 3, and the punch 1 of the stamping structure moves upward Exit the tubul...

technical field

[0001] The invention relates to the technical field of collecting pipe processing, in particular to a punching die structure and a stamping method. Background technique

[0002] The header in the air conditioner is one of the four important components of the refrigeration system. Fluorine is compressed by the compressor to produce high-temperature and high-pressure gas, which turns into a low-temperature and high-pressure liquid after cooling and condensing through the condenser, and enters the header for collecting And shunt, because it has high heat exchange efficiency and extremely low energy loss, it is widely used.

[0003] Its shape is a thin-walled straight-through round tube made of hard aluminum alloy. On the highest point of the cross section, a number of long flanging holes are evenly distributed along the length direction. The flat tube must be firmly fixed in the hole to closely match it and ensure good sealing. The conventional stamping structu...

Examples

Embodiment 1

[0061] Such as figure 1 -7 shows a specific embodiment of a hole turning mold structure, including a lower template 2 , a first mandrel 3 and a second mandrel 4 . The first end of the first mandrel 3 is fixed on the fixed block 5, the second end of the first mandrel 3 is suspended, and the lower template 2 is equipped with a fixed block matching the shape of the fixed block 5. Cavity, the fixed block 5 is installed in the fixed block installation cavity and fixed by inserting a pin, the lower template 2 is provided with a support groove 8, and the length direction of the support groove 8 is parallel to the length direction of the first mandrel 3 Setting, in this embodiment, the surface of the support groove 8 is an arc-shaped groove that matches the shape of the lower surface of the round tube 10, and the round tube 10 is sleeved behind the first mandrel 3 to connect with the support The bottom of the groove 8 is in contact. The first mandrel 3 is provided with a groove 31 c...

Embodiment 2

[0071] This embodiment provides a punching method, using the punching die structure provided in Embodiment 1 to punch and punch a tubular structure, including the following steps:

[0072] In the installation step of the tubular structure, the tubular structure is sleeved on the outside of the fixed first mandrel 3 and supported by the lower formwork 2; the second mandrel 4 is inserted into the tubular structure so that the second expansion of the second mandrel 4 The surface cooperates with the first expansion surface of the first mandrel 3, so that the side walls on both sides of the groove 31 of the first mandrel 3 closely fit the inner wall of the tubular structure;

[0073] In the stamping step, the punch 1 of the stamping structure moves downward, the punch 1 passes through the tubular structure and forms a flanging hole on the tubular structure and is supported by the groove 31 of the first mandrel 3, and the punch 1 of the stamping structure moves upward Exit the tubul...

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