Production line engineering
Assembly line and production line manufacturer
Manual, semi-automatic and automated assembly lines designed around your takt time — stations, conveyors, fixtures, error-proofing, controls and traceability, built and commissioned as one system.
At a glance
- Line types
- Manual, semi-automatic, automated, mixed-model
- Transport
- Pallet, belt, roller, slat, overhead; AGV-ready
- Controls
- PLC/HMI, andon, torque monitoring, traceability
- Timeline
- Indicative 3–6 months from design freeze
- Acceptance
- Cycle time, first-pass yield, uptime
Overview
Lines designed from takt time, not from a catalogue
An assembly line is a set of decisions about time: how much work each station can hold, how parts arrive, how defects are stopped and how the line recovers from a stoppage. Buying a conveyor and placing workbenches along it is not line design — and it is why many new lines never reach rated output.
We start from demand and available time to fix takt, break the product into work elements, balance them across stations, and only then select transport, fixtures, tools and controls. Error-proofing and traceability are designed in from the start, so quality is built at the station rather than inspected at the end.
Wherever practical, the line is pre-assembled and run at build stage (FAT), then installed and commissioned on your site against the agreed cycle time and quality targets.
What we build
Types of lines we design and build
Manual assembly lines
Ergonomic stations, part presentation, tool balancers and visual management for low-to-medium volume and high variant mix.
Semi-automatic lines
Manual loading with automated pressing, screwing, dispensing, marking or testing where it pays back.
Automated assembly lines
Pallet-based transfer with automated stations, robots and vision for high-volume, repeatable products.
Engine & transmission sub-assembly
Pallet conveyors, rotating stations, DC nutrunners with torque-angle monitoring and leak-test integration.
Final assembly & trim lines
Slat, skillet or overhead conveyors for vehicle, equipment and appliance final assembly, with lifts and turntables.
Mixed-model & U-cell lines
Flexible cells and lines that run multiple variants with quick changeover and pick-to-light kitting.
Technical
Assembly Lines — applications, specifications and deliverables
The same three-part technical structure on every solution page, so engineering and procurement can compare scopes without reading marketing copy.
Applications
What it is applied to
- Two-wheeler, three-wheeler and passenger-vehicle sub-assemblies
- EV battery pack, motor and controller assembly
- Tractor, construction-equipment and engine assembly
- Air-conditioner, refrigerator and appliance assembly
- Electrical panels, switchgear and electronics box-build
- Pumps, compressors, gearboxes and valves
Not listed? Describe the operation — most scopes we quote are variations on these.
Typical specifications
What we engineer to
- Line type
- Manual, semi-automatic, automated; inline, U-cell or carousel
- Takt / cycle time
- Typically 20–180 s per station; set from your target output
- Stations
- 4–30 stations depending on work content and takt
- Conveyance
- Belt, roller, slat, pallet free-flow, or lift-and-carry indexing
- Automation level
- Chosen station by station against payback, not applied uniformly
- Controls
- Line PLC with station I/O; Siemens, Mitsubishi, Allen-Bradley, Delta or Omron
- Error-proofing
- Part-presence, torque and depth monitoring, pass/fail interlocking
- Vision
- Presence, orientation, OCR/barcode or measurement where required
- Traceability
- Barcode, QR, DMC or RFID with per-part result logging
- Safety architecture
- Fixed and interlocked guarding, light curtains, e-stop zones
Indicative ranges. Final specifications are fixed against your part and volume at design freeze.
Engineering deliverables
Documents you receive
- General arrangement (GA) drawing with footprint and utility points
- 3D model of the machine or station (native plus STEP/IGES)
- Bill of materials with makes, part numbers and bought-out list
- Electrical schematics, panel GA and I/O list
- Pneumatic and hydraulic circuit drawings with set pressures
- PLC, HMI, robot and vision program backups
- Operation and maintenance manual with SOPs and spares list
- FAT and SAT protocols with signed results
- Line balance and yamazumi chart against agreed takt
- Station work-content sheets and standard work
Programs and drawings are handed over, so your team is never dependent on us for a change.
Engineering scope
How each element is engineered
The design decisions behind the specification above.
| Line length / stations | From 4-station cells to long multi-station lines — defined by takt and work content |
|---|---|
| Transport options | Belt, roller, pallet (free-flow/chain), slat, overhead, turntables, lifts |
| Pallets / fixtures | Product-specific pallets with locators; RFID/QR identification where traceability is needed |
| Error-proofing | Sensors, pick-to-light, torque verification, vision checks, interlocked sequences |
| Tools | DC nutrunners, pneumatic tools, presses, dispensers, markers — integrated with the line PLC |
| Controls & data | PLC/HMI, andon, line status boards, part-level data logging, MES/ERP hand-off |
| Structure | MS fabricated frames, aluminium profile or pipe-and-joint — selected on load and flexibility |
| Safety | Guarding, E-stop circuits, light curtains and interlocks designed from a risk assessment |
Handover
What you receive
Every assembly line project closes with a documented handover — not just a machine on the floor.
- Line-balance study and station work-content sheets
- Line layout, GA drawings and electrical drawings
- PLC/HMI programs and parameter backups
- Error-proofing matrix and validation records
- FAT/SAT reports against cycle time and quality
- Station SOPs and operator training
- Spare-parts list and preventive maintenance plan
Execution
How we execute an assembly line
One project manager, stage gates you sign off, and no hand-offs between vendors.
Study
Product, variants, volumes, shift pattern, available floor and current process review.
→ Takt time + line concept
Engineer
Work-element breakdown, line balancing, station design, conveyor selection and controls architecture.
→ Design freeze
Build
Frames, conveyors, pallets, fixtures and panels manufactured and pre-assembled.
→ FAT at build stage
Install
Line shifted, erected, levelled and connected on site.
→ Mechanical & electrical completion
Commission
Dry cycles, trial builds, cycle-time and error-proofing validation.
→ SAT sign-off
Stabilise
Ramp-up support until the line holds rated output, then handover.
→ Handover dossier
Applications
Where it is used
- Two-wheeler, three-wheeler and passenger-vehicle sub-assemblies
- EV battery pack, motor and controller assembly
- Tractor, construction-equipment and engine assembly
- Air-conditioner, refrigerator and appliance assembly
- Electrical panels, switchgear and electronics box-build
- Pumps, compressors, gearboxes and valves
Industries we serve
Why Mecwerx
Why manufacturers choose us for this
Balanced before it is built
Station count and work content are fixed from takt time, so you do not discover a bottleneck station after installation.
Quality designed into stations
Poka-yoke, torque monitoring and interlocks are part of the design, not add-ons after the first customer complaint.
Proven at FAT
Wherever practical, the line is run before dispatch, so problems are solved in our build area — not on your production floor.
Built for change
We design for your next variant — spare stations, modular conveyors and adjustable fixtures where your roadmap needs them.
Quotation checklist
What we need for an accurate assembly line quote
Send what you have. Missing details are fine — we will fill the gaps during the technical discussion.
- Product drawings, exploded view or a sample
- Variant list and expected mix
- Annual volume, working days and shifts
- Current assembly sequence or process sheet
- Available floor area and layout drawing
- Tools and torques required at each operation
- Traceability or MES requirements from your customer
- Target start-of-production date
FAQ
Assembly Lines: common questions
How do you decide the number of stations on an assembly line?
We calculate takt time from your demand and available production time, break the assembly into work elements with time studies, and balance those elements so no station exceeds takt. The station count comes out of that balance — not from the length of conveyor.
Manual, semi-automatic or automated — which line should we choose?
It depends on volume, variant mix, labour cost, quality risk and payback. We usually automate the operations that are quality-critical or cycle-time bottlenecks and keep the rest manual and ergonomic, and we show the payback for each option before you decide.
Can the line handle multiple product variants?
Yes. Mixed-model lines use adjustable or quick-change fixtures, variant identification on pallets and pick-to-light or HMI prompts so operators build the right variant every time.
Do you integrate torque tools, testing and traceability?
Yes. DC nutrunners, leak testers, marking systems and scanners can be integrated with the line PLC, so every part is logged with its results and a failed part cannot move to the next station.
How long does it take to build an assembly line?
Typically 3–6 months from design freeze for a new line, depending on automation content and conveyor type. Simple manual lines can be faster; robotic lines take longer.
Can you re-engineer our existing line?
Yes. We re-balance, re-layout and upgrade existing lines — adding stations, error-proofing, conveyors or automation — with installation planned around your production.
Related
Related solutions
Conveyor Systems
Belt, roller, pallet, slat, chain and overhead conveyors sized from duty and integrated with stations.
Learn moreSpecial Purpose Machines
Application-specific SPMs for pressing, riveting, drilling, screwing, marking and dispensing — proven at FAT.
Learn moreFactory Automation & Robotics
Robotic welding, handling and palletising cells, PLC retrofits, vision and line data — chosen for payback.
Learn moreStart a project
Hand over your production challenge.
Tell us what the line has to produce, where, and by when. We will come back with a scoped approach, a realistic timeline and the questions that matter — usually after a site visit or a drawing review.
- +91 85959 55435 · Mon–Sat, 09:00–18:00
- WhatsApp an engineer
- info@mecwerx.com
- Detailed RFQ with drawings (PDF, DWG, STEP)