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gdevine
Power-User

Join Date: Mar 2008
Location: Globaly - very close to the southern most point of Canada
Posts: 445
Good Answers: 12

Pneumatic / DC Drivers for Assembly

11/26/2008 2:43 PM

Hey all,

I'm looking for recommendations for brand names and preferred systems.

I have a current requirement for a tool to drive fasteners to controlled torques.

It's not automotive production rates. Heavy equipment rates, so about 6 assemblies per day at a total of 20 fasteners per assembly. Torques are (Nm):

3, 5, 30, 39, 50, 65 & 90

I can break out the lower torques (3&5) to eliminate a tool if required.

Budget… not sure. I do understand a decent pneumatic tool will be in the $1500 - $3000 and a DC system will exceed $10,000 (cdn).

Any help with this would be very much appreciated.

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nick name
Guru

Join Date: Mar 2007
Location: City of Light
Posts: 3943
Good Answers: 183
#1

Re: Pneumatic / DC Drivers for Assembly

11/26/2008 5:02 PM

The choice depends on following aspects:

- accepted limits for dispersion of torques

- need of documentation or not

- availability of control / setting equipment

If you have a control / setting equipment and introduce a tight control programme it is possible to use pneumatic tools even if specified tolerances are tight. Due to control all shifts can be corrected before lilmits are crossed.

The problem if documentation is required is more complex a pneumatic tool has no integrated measuring equipment so that you will be obliged to tighten with a torque transducer to measure the torques and record them. Electric servo tools have integrated measuring equipment and can record automatically all operations.

For different reasons it will be recommended to buy the control equipment not from the tool supplier. For the tools you have a large choice CP, Atlas Copco, aso. I would suggest for the measuring equipment to use the transducers and box from Schatz it is a German very serious and capable manufacturer of control equipment dedicated to the bolting technology. Their box can transmit recorded data to a PC for saving.

I hope it will help If you need more input you can use the personal message channel I shall be glad to give you more input.
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