EuroWire September 2021

Manufacturing Technology

▲ TK7200 CNC spring coiling machine

▲ CNC1260 CNC spring forming machine

CNC spring machinery WNJ, China, specialises in spring coiling machines, spring forming machines, spring temper furnaces, spring grinding machines and other related equipment. tested in the domestic market over the past two years and has started to be sold to overseas customers.

Equipped with right- or left-handed winding blade rest, the machine can perform straight cutting, opposite cutting and twisting cutting, with 3D analogue programming. WNJ’s CNC spring forming machines accommodate wire diameters from 0.3 to 8mm, with the functions of bending, hooking and looping. The CNC1260 has a cam-less design, and springs are set up with high speed, accuracy and stability. The wire feed with rotary wire function is easy to adjust. The machines are suitable for making double torsion springs, straight springs, pagoda tension springs and other special-shape springs. The company also produces CNC spring grinding machines (wire diameters from 2.5 to 12mm) with automatic detection, compensation and alarm functions; and ZW axis wire bending machines (2.5 to 12mm wire diameter) with eight-axis continuous design, for snake-shaped spring and wire bending. WNJ Spring Machine Co, Ltd www.chinathjx.com

Its main advantages are speed and accuracy: wire feeding is controlled by separate motors, either simultaneously or separately according to the springs. The products have passed ISO9001-2008 international quality management system certification, CE certification and CSA certification. WNJ has specialised in spring machines since 1986, initially in China, then expanding to overseas markets with agencies in Europe, Turkey, Korea, Argentina, Iran, India and the USA. It currently produces five ranges of machine, covering more than 40 specifications. The company’s line of CNC spring coiling machines cover wire diameter ranges from 0.15 to 23mm, with options of 3D automatic programming, probe, camera detection and colour sensor. The main machine is the TK7200, which is controlled by 12 axes that can work in single-step or synchronously.

The company designs and manufactures various specifications of product accord- ing to customer requirements. Long-term cooperation has been estab- lished with Xiamen University, experts from Germany and other institutions. The company’s new production site is designed to foster high levels of flexibility in manufacturing. Along with optimised logistical sequences, machine production at the new plant is more efficient. Following years of continuous growth, it was necessary for WNJ to avoid bottlenecks in production and ensure reliable delivery times. Due to an overall improvement in operating processes, throughput times have been reduced and productivity increased in each business unit. WNJ’s latest seven-axis spring coiling machine (for up to 20mm) has been

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September 2021