Manufacturing method of bimetal cylinder
A production method and bi-metal technology, applied in the direction of manufacturing tools, furnace types, furnaces, etc., can solve the problems of insufficient inner wall strength, shortened service life, etc., and achieve long service life, extended service life, and good wear resistance and corrosion resistance. Effect
Active Publication Date: 2013-11-06
浙江精制机械有限公司
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Problems solved by technology
However, the disadvantage of its structure is that the inner wall of the barrel is not strong enough, and it is easy to wear and corrode, thereby shortening the service life
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[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0025] Such as Figure 1 to Figure 3 Shown, a kind of manufacturing method of bimetal machine barrel is characterized in that it comprises the following steps: one, select the metal bar of 40Cr or 42CrMo, blank according to specification, length; Before drilling, the outer circle of the alloy rod is roughly machined into an outer circle, so that the hole diameter is 3 to 4 mm larger than the drawing requirements to form a barrel body; third, NiCrWcCoB is placed in the inner cavity of the drilled barrel body Alloy powder and flux, the ratio of each component of NiCrWcCoB alloy powder is: in every 100 parts of NiCrWcCoB alloy powder, 8-12 parts of chromium (Cr), 5-8 parts of cobalt (Co), 2.5-4 parts of boron (B) Parts, tungsten carbide (Wc) 15-30 parts, the rest is nickel, the above is the weight part, and the flux is borax; then weld the two e...
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The invention discloses a manufacturing method of a bimetal cylinder, which comprises the following steps of: selecting 40Cr or 42CrMo metal bars and feeding according to specifications and lengths; drilling holes on the fed metal bars and enabling the apertures of the holes to be 3-4mm larger than that required in a drawing to form a cylinder blank; and filling NiCrWcCoB alloy powder and a fluxing agent in a cavity of the drilled cylinder blank, welding seal covers on two ends of the cylinder blank, and filling the NiCrWcCoB alloy powder into a cavity (3) of a cylinder (1) in a sealing way, wherein the addition amount of the NiCrWcCoB alloy powder is the using amount required by the thickness of an alloy layer (2), and the addition amount of the fluxing agent is 4.5-5.5 percent of the NiCrWcCoB alloy powder. Through the adoption of the structure, the inner layer of the cylinder has the effects of high wearing resistance and high corrosion resistance; and aiming at engineering plastic, halogen-free plastic, fluoroplastic and the like, more than 35 percent of glass fiber is added, and the plastic with extremely strong wear resistance and corrosion is selected for manufacturing of the alloy cylinder, therefore the service life of the cylinder is prolonged more than ten times than that of the common nitride cylinder.
Description
technical field [0001] The invention relates to the technical field of cylinder production, in particular to a production method of a bimetallic cylinder used in injection molding machines, extruders and rubber machines. Background technique [0002] There is a Chinese utility model with patent No. 02229223.3 titled "A barrel of a conical twin-screw plastic extruder" which discloses a structure, which consists of a barrel and a screw, and the inner hole of the barrel is It is two intersecting tapered holes, and a tapered screw rod is respectively arranged in the two tapered holes. It is characterized in that: the cylinder body is composed of more than 4 segments. The barrel body of the utility model is composed of multiple sections, so the barrel body can be processed in sections, and the processing is convenient. However, the disadvantage of its structure is that the inner wall of the machine barrel is not strong enough, and it is easy to wear and corrode, thereby shorteni...
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IPC IPC(8): B23P15/00C23C24/10C21D9/00C21D1/667
Inventor 周建军
Owner 浙江精制机械有限公司