Composite punch
A punch and body technology, applied in the field of die casting machines, can solve the problems of large difference in thermal expansion coefficient, expensive material body, bending deformation of the injection rod, etc., to achieve the effect of increasing the average life, ensuring normal and stable production, and not easy to fall off
Inactive Publication Date: 2013-04-24
陈新华
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Problems solved by technology
During the die-casting production process, the injection punch reciprocates in the pressure chamber. If the thermal expansion coefficients of the two materials differ greatly, the injection punch and the pressure chamber are heated unevenly, or the injection rod is bent and deformed, the aluminum liquid will be embedded in the injection The gap between the punch and the press chamber forms a cushion or abrasive particles, which causes the injection punch to wear
The wear and tear of the injection punch often causes the phenomenon of suction cylinder, cylinder jam, etc. At this time, the "flying aluminum" must be cleaned and replaced with a new punch
At present, most of the injection punches used by most manufacturers in my country are integral components. Once the surface wears out of tolerance, the entire punch will be scrapped, especially for large imported die-casting machine punches. Due to their large size, the material body is expensive and discarded. The waste caused is relatively large, and it is not conducive to energy saving and environmental protection
Method used
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[0012] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.
[0013] see figure 1 , the embodiment of the present invention includes:
[0014] A composite punch includes a punch body 1 , a threaded hole 2 is arranged inside the punch body 1 , and the outer side of the punch body 1 is welded to a cermet coating 4 through a solder layer 3 .
[0015] The punch body 1 is made of cast iron, carbon steel or alloy steel with high strength. The solder layer 4 between the punch body 1 and the cermet coating 4 is made of silver copper or copper, which is firmly connected and not easy to fall off.
[0016] The cermet coating layer 4 is an aluminum nitride titanium oxide coating, and the thickness of the cermet coatin...
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Abstract
The invention discloses a composite punch which comprises a punch body. Thread holes are formed in the punch body, and the outer side of the punch body is connected with a metal ceramic coating layer in welding mode through a welding flux layer. The metal ceramic coating layer, namely a nitrogen titanizing aluminum coating layer is welded on the outer side of the punch body, and the coating layer is high temperature resisting, large in hardness, strong in wear resisting, and good in affinity. The coating layer maintains well combination with the punch body, is not easy to fall down, and not easy to abrade so that average service life of the punch is improved, maintenance cost of regulation of the punch is saved, troubles and workload of punch regulation of work staff are reduced, normal and stable production of a die-casting machine is guaranteed, and production efficiency is improved.
Description
technical field [0001] The invention relates to the field of die-casting machines, in particular to a composite punch. Background technique [0002] Die casting is a casting method that makes molten metal fill the mold cavity at an extremely fast speed under high pressure. During the die-casting production process, the injection punch reciprocates in the pressure chamber. If the thermal expansion coefficients of the two materials differ greatly, the injection punch and the pressure chamber are heated unevenly, or the injection rod is bent and deformed, the aluminum liquid will be embedded in the injection The gap between the punch and the press chamber forms a cushion or abrasive particles, which in turn causes the injection punch to wear. The wear and tear of the injection punch often causes phenomena such as the suction cylinder and the cylinder being stuck. At this time, the "flying aluminum" must be cleaned and a new punch must be replaced. At present, most of the inje...
Claims
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IPC IPC(8): B22D17/20
Inventor 陈新华
Owner 陈新华