Products Description
This custom CNC machine steel hydraudic piston was designed by us for the customer's hydraulic bolt gun. It is made of alloy steel AISI4340 and then by quenching and tempering treatment. After surface turning and grinding, the dimensions are precise to 0.03-0.05mm. It is blacken to enhance rust resistance and improve appearance. The film layer is dark black and only 1-2 microns thick. The piston is a moving part that undergoes frequent movement and has high technical requirements. The quality of piston rod processing directly affects the lifespan and reliability of the entire product. The processing requirements for piston rods are high. Their surface roughness is required to be Ra0.4 to 0.8 μ m, and strict requirements are imposed on coaxiality and wear resistance. The working mode of the piston rod is reciprocating motion. To increase the service life of the piston rod and reduce the wear halo of the piston rod, the blank is made of AISI4340 alloy structural steel. Based on the processing accuracy requirements of each part in the part drawing, we can customize non-standard pistons for different hydraulic tools and industrial instruments for customers.
Production Process
How We Make It
Raw material inspection: AISI 4340 alloy steel bars are inspected for chemical composition and ultrasonic flaw detection to ensure that the material is defect-free at the source.
Rough machining and forming: Use CNC lathe or milling machine to perform preliminary cutting and rough machining of the shape, leaving uniform allowance for subsequent finishing.
Heat treatment: The rough-machined workpiece is subjected to tempering treatment (quenching + high-temperature tempering) to obtain the required core strength and toughness.
Precision CNC machining: During the semi-finishing and finishing stages, high-precision CNC machine tools are used to perform precision milling and turning on key parts such as the piston's outer circle, end face, sealing groove, threaded hole, etc., ensuring that dimensional and geometric tolerances reach the micron level.
Grinding and finishing: For cylindrical surfaces that require extremely high dimensional accuracy and surface finish, precision cylindrical grinders are used for final grinding.
Surface treatment: According to application requirements, the surface treatment selects the blackening process to enhance the anti-rust ability and improve the appearance. The film layer is dark black and the thickness is only 1-2 microns.
Final inspection and cleaning: Use three-coordinate measuring machines (CMM), roughness testers and other precision instruments to conduct full-size final inspection, and then carry out thorough cleaning, rust prevention and packaging.
Product Process
1
High-precision CNC lathes are used to perform precision turning on key parts of the piston, including the outer circle, end face, sealing groove, threaded hole, etc., to ensure that the dimensional and geometric tolerances reach the micron level.
2
For the outer cylindrical surface that requires extremely high dimensional accuracy and surface finish, a precision cylindrical grinder is used for final grinding.
3
Blackening is a chemical process. Cleaned AISI 4340 pistons are immersed in a specialized acidic blackening solution containing selenate and other ingredients. A chemical reaction between the steel surface and the solution forms a dense film primarily composed of iron selenide (FeSe) and iron oxide (Fe₃O₄). This film adheres firmly to the metal substrate, resulting in the dark black or bluish-black color you see.
Case Studies
Material Application
Application of AISI 4340 Alloy Steel in Various Industries
The exceptional properties of AISI 4340 make it an indispensable material in several key industrial sectors.
Aerospace Industry
Landing Gear Components: Piston rods, connecting rods, actuators, and more for aircraft landing gear. This is one of 4340's most classic applications, requiring the material to withstand extremely high impact and cyclic loads.Engine Parts: Turbine shafts, gears, drive shafts, connecting rods, and more.Flight Control Components: Rocker arms, fasteners, and more.
Automotive Industry
Crankshafts and Connecting Rods: Forged crankshafts and connecting rods for high-performance engines. Transmission System Components: Gears, drive shafts, clutch shafts, and differential components. Suspension and Steering Components: High-performance steering knuckles and suspension links.
Defense Industry
Armored Vehicle Components: Turret components, track pins, and drive shafts. Firearm Components: Barrels, breech blocks, and recoil system components.
Oil and Gas Industry
Drilling Tools: Drill collars, downhole tools, valve bodies, and pump components. These components must operate in extreme environments with high pressure, high corrosion, and high wear.
Tools and Molds
Injection and die-casting molds: In particular, mold cores, cavities, and inserts that require high strength and wear resistance. Extrusion molds and mold bases.
Construction machinery
Hydraulic cylinders used in excavators, cranes and other equipment enable precise lifting and digging actions under harsh working conditions.
Company Profile
Our factory & quipment
Xi'an Hi-Precision Machinery Co., Ltd. is a CNC machining facility in China that provides custom CNC machine steel hydraudic piston. Our fleet of advanced, fully automatic CNC lathes, machining centers, and high-precision grinders ensures efficient and precise forming and processing of a wide range of steel materials. Our experienced engineers, skilled operators, and rigorous quality control team implement a rigorous quality control process, from raw material inspection and initial in-process inspection to full inspection of finished products. We also offer expedited sample processing for testing and verification, and we provide comprehensive after-sales technical support to ensure every customer receives a reliable and satisfactory experience, from trial production to mass production.
Why Choose Us
Highlighting Advantages Of Our Service
Why choose us to custom CNC machine steel hydraudic piston
Exquisite craftsmanship and professional equipment
We use advanced CNC machine tools and special tooling to ensure that the dimensional accuracy, geometric tolerances and consistency of each steel piston meet strict standards.
Comprehensive material and surface treatment solutions
We not only understand the properties of various steel materials, but can also provide the most suitable surface enhancement treatment based on your working conditions, significantly improving the durability and reliability of the piston.
Rigorous quality control system
Full quality monitoring and complete testing records throughout each production link ensure that every product delivered has stable performance and reliable quality.
Flexible customization capabilities and response speed
From rapid prototyping to mass production, we have highly flexible manufacturing capabilities, can quickly respond to your customization needs, and provide timely technical communication and after-sales support.
Contact Us
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Looking forward to your inquiry
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