Street Address: Da'an Industry Zone, Yongchuan District
City: Chongqing
Province: Chongqing
Country/Region: China
trailer
1.material: SUP9 2.WidthxThicness: 80x20 3.the sizes: 679 Parabolic springs are made as follows: 1.Shearing of flat bar 2.Parabolic Rolling 3.Center hole punching / Drilling 4.End Heating process forming (hot & cold process) a. Eye Forming / Wrapper Forming b. Diamond cutting / end trimming / width cutting / end tapering c. End punching / end grooving / end bending / end forging / eye grinding d. Center hole punching / Drilling / nibbing 5.Heat Treatment a. Heating b. Camber forming c. Quenching d. Tempering 6.Surface preparation a. sand blasting b. Painting 7.Eye bush preparation process a. Eye reaming / eye boring b. Bush insertion c. Bush reaming 8.Assemble a. Presetting & load testing b. Paint touch-up c. Marking & packing