Product category:
Tubeworking: bending, cutting-off, profiling and end working
News Release from: Kasto
Edited by the Manufacturingtalk Editorial
Team on 24 October 2000
Bema appoints Rivers Machinery as UK
agent
The Italian company BEMA, which manufactures equipment for processing tubes up to 130 mm diameter, has appointed Rivers Machinery as its UK agent.
The Italian company BEMA, which manufactures equipment for processing tubes up to 130 mm diameter, has appointed Rivers Machinery as its UK agent BEMA offers an extensive machine range from stand-alone, manually-fed models to fully automated lines
This article was originally published on Manufacturingtalk on 23 May 2001 at 8.00am (UK)
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The company's policy is to build standard machines with the option of various degrees of automation.
In this way, the customer enjoys the flexibility of a bespoke solution yet retains the option to reconfigure the machines to suit a different family of components.
Tube bending and end working machines that are loaded and unloaded by the operator form the mainstay of the BEMA portfolio.
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The next stage is to employ an automatic feeding mechanism for each machine.
Finally, the production units can be interconnected by robotic or other handling plant to automate the whole production process.
In this way, a component of surprising complexity may be produced from a length of tube in one hit, without any manual intervention.
The finished product, in addition to being bent along its length with different radii, might be formed (swaged, flared, reduced, thread rolled) on both ends.
Additional operations can include turning, boring, thread cutting, tapping, grooving, chamfering and deburring.
The latest BEMA machines allow a further degree of automation, enabling press fitting of parts such as inserts, sockets, rings and nuts during the bending operations, thus keeping the overall cycle time the same.
As some tube processing plant has in the past been known for insufficient attention to operator safety, it is worth stating that all BEMA lines meet CE requirements and are constructed with comprehensive guarding and interlocks to ensure that accidents cannot happen.
A typical project is a cell made recently by BEMA for a major European automotive manufacturer, which needed to form a small diameter steel tube on both ends and bend it three times, including one counterbend.
The required productivity was 300 parts per hour, working two to three shifts.
Additionally, it was stipulated that the cell should comprise standard tube end forming and bending machines so that the units could be used individually to make other products.
The cell comprises two CNC tube end working machines type SER 12x6-CN, having 12 tonnes force and six working stations, complete with automatic feeder (photograph 3), one CNC tube bending machine type REKORD 16 with automatic feeder (photograph 4), and a tube handling plant to integrate the machines.
A production rate of in excess of 320 pieces per hour is guaranteed, which includes control of product dimensions by in-process gauging and automatic removal of faulty parts.
Statistical process control is employed, providing a facility to stop the line if the number of rejects exceeds a certain percentage.
The equipment for handling the tubes between the different production units also discharges the finished piece from the tube bender by means of an arm that places the component on a mobile unload station outside the cell, after having it turned through 180 degrees to leave it in the best position for the subsequent brazing operation.
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