How DPS Replaced

Smarter, Leaner, Stronger: How DPS Replaced 7 VMCs with 2 Custom-Built SPMs

At Distinct Productive Solutions (DPS), we believe in engineering excellence that doesn’t just meet standards, it sets them. One of our most successful productivity transformation stories came from rethinking the manufacturing process of a high-volume precision component, originally produced on 7 Vertical Machining Centers (VMCs).

With monthly production demands reaching 500,000 pieces (20,000 per day), our setup became unsustainable. It demanded high power, large floor space, more manpower, excess coolant, frequent tool changes, and faced challenges in rejection rates. We knew it was time to reimagine the process.

Identifying the Need for Change

This case study exemplifies the potential for innovation in manufacturing processes, particularly in industries facing price sensitivity and high precision demands.

As production volumes escalated, managing the flexible manufacturing system became increasingly complex and inefficient. The management team recognized the necessity of enhancing productivity while simultaneously reducing operational costs. Initial considerations included the integration of robotic systems for all seven machines; however, this option was deemed too costly and impractical due to anticipated productivity losses.

Consequently, a strategic decision was made to develop two dedicated SPMs specifically designed for the operation. This shift aimed to optimize various aspects of the manufacturing process, including:

Reduced Space Requirements

The new SPMs would occupy significantly less floor space compared to the existing VMC setup.

Lower Power Consumption

Energy-efficient designs were prioritized to minimize electricity usage.

Decreased Coolant Usage

Efficient machining processes were implemented to reduce coolant needs.

Fewer Tools and Operators

Streamlined operations meant that fewer tools would be required, along with a reduction in the number of operators.

Minimized Rejection Rates

Enhanced precision and automated quality control systems would lead to fewer defective parts.

Evolution of the SPM Concept

The initial concept involved a Rotary SPM design; however, this idea was ultimately discarded due to concerns regarding maintainability and the complexity of machine construction. Through several iterations and refinements, the project team derived a set of desires and inferences for the new SPMs, focusing on practicality and efficiency.

Key Desires and Inferences for the New SPMs
The following table summarizes the primary objectives and insights gained during the development of the new SPMs:

Description	Desires / Inferences Derived
Manufacturing Strategy	Should be a 5 Spindle SPM to enhance productivity.
Number of Machines	Only 2 machines needed due to multi-spindle capability allowing for multiple simultaneous operations.
Idle Time to Cycle Timer Ratio	Implement a 2-station configuration: one station for loading/unloading and another for operational tasks.
Use of Pallet Changer	Component loading on a fixed table to ensure maximum repeatability; moving column configuration required.
Floor Space Required	Design should occupy less floor space, optimizing factory layout.
Total Connected Load	Aim for less power consumption to reduce operational costs.
Loading/Unloading Efficiency	Operator workload reduced by 50% as one reloading task is eliminated.
Number of Operators	Only 4 operators required (2 machines with 2 operators each, working 12-hour shifts).
Fatigue of Operators	Operators can work in a sitting posture, reducing fatigue and improving comfort.
Nature of Operators	Minimal need for skilled labor due to no frequent offset corrections or tool changes necessary.
Coolant Tank Requirements	Less coolant is required, leading to cost savings and simplified maintenance.
Initial Investment	Focus on an in-house developed SPM, reducing reliance on external suppliers and enhancing control over production.
Cost Levels (on a scale of 100)	Significant cost savings are anticipated due to efficiency improvements and reduced operational expenses.
Rejection Levels	Reduced rejection rates compared to previous setups (7 spindles and 3 tools leading to 21 offset corrections), minimizing thermal stabilization issues.
Risk of Obsolescence	The CNC SPM machine should be convertible into Horizontal or Vertical Drilling Machines, offering versatility for future needs. Only the spindle head may become obsolete.

The transition from 7 conventional VMCs to 2 custom-built, in-house Special Purpose Machines (SPMs) at DPS is a testament to our unwavering commitment to innovation, lean manufacturing, and value-driven engineering. By reimagining the process from the ground up, we achieved significant improvements in productivity, cost efficiency, operator comfort, and floor space optimization — all while meeting the growing volume demands without compromising on quality.

This transformation not only resolved the immediate operational challenges but also future-proofed the manufacturing line with scalable, energy-efficient, and flexible machinery. The success of this initiative reinforces DPS’s position as a forward-thinking manufacturing partner capable of delivering distinct, productive solutions that drive real-world impact.