Are you looking for tube bending or pipe bending services in Sydney?
R.J. Walsh & Son specialises in affordable, high-quality tube and pipe bending. We have twenty-eight years of experience in mandrel tube bending, supplying customers in the automotive, nautical, aviation, construction, furniture and medical equipment industries.
We can bend the following materials:
We employ two numerically-controlled hydraulic benders, a Pedrazzoli 42 and a Crippa Agostino Mediolanum 2, which produce professional, wrinkle-free bends every time. We have tooling for the following tube specifications:
Diameter (mm) 10.0 12.7 15.9 22.2 25.4 31.8 38.1 44.45 50.8 63.5 76.2 We also have a Tauring 31.8mm capacity ring roller, which allows us to produce large rings with radii of 0.2m up to 3.0m.
We can also weld (MIG/TIG) and swage (expand or contract the ends of) your job on-site if required.
Unique software allows us to give you a final price on your job over the phone before we begin. Most jobs are completed within days of the first enquiry, and can be collected from our factory, or shipped anywhere in Australia. Some examples of our competitive pricing:
| Nissan 300SX Coolant Tube Mandrel bend in T304 stainless Run size: 1 off Turnaround: 2 days Price: $81.50 (inc. GST) |
Custom light fitting T316 stainless cut and swaged Run size: 100-200 off Turnaround: 3 days Price per piece: $8.15 (inc. GST) |
Shower pipe Mandrel bend in T304 stainless Run size: 20 off Turnaround: 2 days Price per piece: $10.80 (inc. GST) |
Call us for a quote on (02) 9707 3411 Mon–Fri between 7:30am and 3:00pm. Alternatively you can e-mail Jim Walsh at jimw@comcen.com.au. If you have a drawing of your job, please fax it to us on (02) 9707 3629.
Tube differs from pipe in having a relatively thinner wall thickness. Typical wall thicknesses dealt with vary between 0.5 mm and 1.6 mm, in tube diameters of 10mm to 76 mm.
In order to successfully bend thin-walled tubing around bend radii of two tube diameters or less, it is necessary to support the tube inside and out during the bending operation. This calls for powerful and expensive machinery plus skilled operation.
In addition, it will frequently be the case that the tube is required to be bent on two or more planes and that the distances between the bends be tightly controlled.
The mathematics involved in multi-plane bending is extremely complex, especially when tube stretch and spring-back must be taken into account. Most tube benders use either trial and error, or expensive CNC benders which do the math for them. We, however, have created our own computer-based program which, given the three dimensional Cartesian coordinates of the tube centre-line intersection points, will produce all of the data needed to set up the benders.
- The sequence of operations in bending a tube of moderate complexity is as follows:
- From a system layout or assembly drawing showing the finished dimensions of the part, or the fitting points to be connected, the optimum shape or path is chosen, ensuring it is a series of straight segments with as few bends as possible.
- Six factors (at least) must now be considered:
- Distance between bends
- Angle of each bend
- Tube rotation between bends
- Material stretch
- Material springback
- Required blank length
A mandrel tube bender works in this sequence:
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All tooling (former, clamp, pressure die, wiper die and mandrel) is fitted to the machine for the required tube diameter, wall thickness and bend radius. One or more trial bends are done to check the accuracy of the set-up.
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The required length of blank is placed over the mandrel into the machine.
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The first straight length is extended forward of the first bend start position,
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The first bend is done by cycling the machine.
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The next straight length is extended.
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The tube is rotated as necessary to put the next bend into the required plane for the motion of the bending head.
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The second bend is made
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The same steps are repeated for the rest of the bends.
