1. Introduction
In modern conditions of industrial production, the requirements for the accuracy and speed of quality control are growing exponentially. Manual measurement methods, which have been the standard on the shop floor for decades, are becoming a bottleneck that limits productivity and leads to high scrap rates due to subjective factors. Modernization to automated control systems (ACS) is not only a matter of prestige, but a requirement for compliance with ISO 9001:2015 standards and EU requirements for energy efficiency and product quality.
Automation allows you to eliminate the human factor, ensure the stability of measurements (repeatability) and integrate data into the production management system (MES). The transition to ACS is a critical step for companies seeking to remain competitive in the market.
2. Evaluation of outdated systems
Before deciding on a complete replacement, an evaluation of existing manual methods should be carried out. Outdated equipment often does not provide the necessary accuracy that meets modern tolerances (ISO 2768-1). The assessment is based on the following criteria:
| Evaluation criteria | Manual system | Target (Automation) | Priority of modernization |
|---|---|---|---|
| Measurement accuracy | Depends on the operator | < 0.005 mm | Tall |
| Cycle speed | 3-5 minutes per detail | < 10 seconds per detail | Tall |
| Data registration | Paper magazines (handmade) | Automatically (SQL/ERP) | Average |
| MTBF (Time Between Failures) | Depends on wear of calibers | > 50,000 cycles | Tall |
3. Modern alternatives
When upgrading, it is important to choose components that provide durability and ease of integration. For example, high-quality passive components such as the precision resistor Allen Bradley RCR05G133JS (13 kΩ) must be used for high-precision signal transmission from sensors to control systems. This ensures stable operation of analog measuring circuits.
| Characteristics | Manual measurement | Automated system | Economic effect |
|---|---|---|---|
| Technology | Mechanical gauges | Laser/optical sensors | 85% reduction in scrap |
| Energy consumption | 0 kW | 0.5 - 2 kW/h | Optimization of energy consumption |
| Service | Frequent recalibration | Periodic (ISO 10360) | Reduction of personnel costs |
4. Calculation of ROI (Return on Investment)
Let's consider an example of modernization of a shaft processing line. Suppose that the production cycle is 2000 parts per shift.
- The cost of manual control: 2 operators (150 UAH/hour * 16 hours * 2) = 4800 UAH/shift. Deficiency due to errors: 3% (60 parts * 500 UAH = 30,000 UAH/change). Total: 34,800 UAH/shift.
- Automated system: 1 operator per setup (200 UAH/hour * 8 hours = 1600 UAH). Lack: 0.2% (4 parts * 500 UAH = 2000 UAH). Energy: 2 kW * 4 UAH/kW * 16 hours = 128 UAH. Depreciation of equipment: 500 UAH/shift. Total: UAH 4,228/shift.
- Savings: 34,800 - 4,228 = 30,572 UAH per shift.
- Payback period: With investments of 1,500,000 UAH, the payback period is less than 50 working days.
5. Stages of implementation
The modernization approach should be phased to minimize production downtime:
- Audit and planning: Analysis of measurement tasks, identification of bottlenecks.
- Pilot project: Implementation of ACS in one critical area.
- Purchasing and preparation: Using quality components (Allen Bradley sensors, controllers, resistors).
- Installation and integration: Parallel work with manual control for 2 weeks for data validation.
- Commission and training: Staff training and final transition.
6. Technical challenges
The biggest challenges in implementing automation are vibrations in the production and integration with the PLC. Using high reliability components like the RCR05G133JS minimizes noise in the signal circuits. It is necessary to take into account the requirements of the DSTU EN 60204-1 standard regarding electrical safety of automation systems.
7. Case: Automation of production of hydraulic valves
Before the modernization, the company used manual micrometers. The MTBF of the control system was low due to wear of the measuring surfaces. After installing ASK using modern sensors, accuracy increased from 0.05 mm to 0.002 mm, and productivity increased by 28%. The number of complaints from consumers decreased by 90%.
8. Commission and Validation
Commissioning of the system is carried out in accordance with ISO 10360. The following procedures must be performed:
- Repeatability testing (Gauge R&R study).
- Calibration against standards certified according to metrological standards.
- Verification of integration into the enterprise network (Ethernet/IP or PROFINET).
9. Conclusion
Quality control automation is a necessity, not a choice, for modern manufacturing. Switching to ACS allows you to significantly reduce costs, increase reliability and ensure compliance with international standards. For a selection of upgrade components, including precision electronics and migration advice, please refer to the UNITEC-D E-Catalog.
10. Links
- ISO 9001:2015: Quality management systems.
- ISO 10360: Geometric characteristics of products (GPS) — Acceptance and periodic tests of coordinate measuring machines.
- DSTU EN 60204-1: Machine Safety. Electrical equipment of machines.
- Reference documentation for manufacturers of automation components (Allen Bradley).
