Shops of all sizes today face a consistent challenge — labor shortages. It’s never been more difficult to find, onboard, and retain skilled machinists; let alone find machinists who can work second (or even third) shifts.
Automation is increasingly the pathway to bridge these gaps. To date, much of the automation discussion has focused on various flavors of robotics for unmanned machining. However, multi-pallet automation—an oft-overlooked ingredient to unmanned machining—also delivers efficiency and scalability shops seek without the leap into robotics.
Here are 10 reasons to consider 5-axis multi-pallet machining in your shop.
As mentioned, finding and keeping skilled machinists is the top issue most machine shops face today.
The challenge will only grow as the current workforce ages and incoming machinist classes at technical colleges struggle to keep up.
Meanwhile, the “growing your own” approach with in-house training or full apprenticeships takes time (often years). The lack of talent is made more acute as demand for talent continues to outpace the supply—including during second- and third-shift hours.
Actual spindle utilization (spindle is running and cutting) of 3-axis vertical machining centers (VMCs) averages about 20-30% for most job shops. That’s counting only first shift.
A single-table, 5-axis vertical machining center is an improvement due to reduced setup time. However, it is still limited by inspection downtime and limited capacity for unmanned operations.
Spindle utilization with a multi-pallet, 5-axis machine tool should exceed 85% and could target 95%.
Most job shops report their sweet spot as high mix and low volume. Yet, they produce these components with equipment requiring multiple and/or complex setups.
Parts produced on a 3-axis vertical machining center out of a solid billet will require multiple setups, extensive setup time, and batch manufacturing in order to be competitive.
Cutting parts on a 4-axis horizontal machining center (HMC) is justified with higher production, but may still require the purchase of tombstone fixtures.
Three-axis VMCs are idle during part inspection unless you remove the setup, which adds even more cost and inefficiency to your processes.
A 5-axis VMC or HMC with a highly-repeatable multi-pallet system allows you to keep machining the next part, while you remove the setup on the pallet to be inspected in process or prior to final acceptance. That is—no downtime!
Say every shop in your area has a 40” x 20” table, 30-tool, 12,000 rpm VMC. What makes you different?
A true 5-axis machine not only enables you to quote true 5-axis parts. It allows to make “3-axis parts” just in time and more cost effectively than your competitors in the area.
Will you pressure suppliers to lower their costs? Or even change supplies? Your competitors are likely doing the same. And, changing suppliers always comes with hidden and/or unexpected costs.
How will you reduce your lead times without evolving your processes and technology? Shops simply can’t say they’ll do it and risk failure. That will deliver a poor customer experience.
Adding more of the same machines will further reduce precious floor space, and not help your staffing issues.
Make it up with overtime or try to schedule second and third shifts? Or reprioritizing your daily shop schedule? That’s will impact your existing team members.
True Total Cost of Ownership (TCO) for a machine tool can be calculated by:
For example, let’s compare a fully-integrated, 5-axis, multi-pallet (at least 5 pallets) solution from Methods.
(Methods column below is an example with generic pricing. Not a specific solution)
Investing in a high-accuracy, high-quality machine tool will actually reduce your part cost
Just 30% of small businesses survive the transition from first to second generation ownership. (Source. External Link. Opens in new window.)
So the question is — what will you do to set up your business for success now and with the next generation of leadership?
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