Automatic Long U Hairpin Bender
-Specification of RHP8-4000 Hairpin Bender
-Tube specification: 4 * 7mm & 4* 3/8"
-Length of hairpin: 200-4000
Structure & operation:
RHP8-4000 Model hairpin bender quoted here consist of:
-Powered uncoiler station
-A changeable rerounding & straightening system to allow for further diameter changes.
The rounding & straightening wheels are set on both the vertical and horizontal plane,which will straight the tubes from the 2 plates. Each tube has 2 rounding wheels and 12 straighten wheels.
The feeding system is a hydraulically driven friction feeding device, with air cylinders controlling the actual pressure applied to the individual feed belts. When feeding, individual air cylinders will apply proper pressure to each of the belts. The upper and bottom belts will clamp one copper tube and feed to proper length.when the proper length is almost achieved. The feeding speed will change from fast to slow, and the air cylinder pressure on the belt will change from high to low. Each air cylinder will lose almost all pressure when the tube it is feeding reaches the final proper position against a Hard Stop plate. It will hold that tube in place until all tubes have achieved the final proper position. Thus all hairpin ends are in the same final location assuring both the consistence of hairpin length and equality of leg lengths.
A fixed location cutting system
The copper tubing cutting system utilizes outer rotating cutter blades to cut the tube. Lubrication takes place.
The feed belts reverse and separate the tube ends after cutting.
The bending system can move in the length direction to produce hairpin of different lengths. The leg length is set from the PLC and Programming is fully automatic
The bend system is servo driven.
This is allows for much better accuracy and less free play or back lash then the older type of hydraulically driven bending heads found in many competitor's units.
"Quick Change" Tube support booms are provided to support the guide tubes and allow change from one length to another in less than 2 minutes
The Hairpin Bender will be capable of receiving such special sets of bend tooling as may be dictated by specific bend radius requirements and / or changes in tubing diameter up to16mm maximum.
A sensingdevice is provided in each lubrication tank to monitor the level of oil to prevent operating the equipment without proper lubrication. A corresponding diagnostic message will be displayed on the touch screen when the level is low
An tube pick off device is included which will support the tubes while stripping and lay them down in the tube collectors. This will produce straighter hairpins for longer lengths.
There is a tube end Sizer attachment to re-open the ends of the hairpins that do not passover the mandrels;
Automatic set-up of the hairpin bender and leg length adjustments can be accomplished through the use of a standard programmable controller interfaced with a touch screen. This also provides diagnostic information for trouble shooting, Semi-automatic control and manual actuation of all machine functions. Additionally, The machine is capable of automatically positioning to specific hairpin length. Both legs of hairpin are adjustable through the touch screen and can be moved either independently or together by dedicated servo motors. The motors are capable of running at both fast and slow speeds to decrease setup time and facilitate precision adjustments. Over-travel switches on each axis help protect the machine with digital readouts on the touch screen display the current and target location in increments of 0.1mm. After the target location on each axis has been reached, hydraulic clamps lock in place to prohibit drifting.Cable/hose carriers are provided to the back of the machine and the switch tower area to prevent hose and cable damage and imprve the general esthetic of the equipment
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RETA MACHINE CO.,LTD
Add: #99, Daqing South Road,
Jiangbei District, Ningbo,China.
- Long U Hairpin Bender