Turning & Lathe Fixtures
HEMSUN ENGG. INDUSTRIES designs and manufactures precision Turning & Lathe Fixtures, jigs, and custom CNC workholding systems at our Dahegam (Gujarat) toolroom. Explore fixture configurations and technical parameters below.
Working principle and engineering architecture
The engineering principles behind Turning & Lathe Fixtures utilize kinematic 3-2-1 locating principles, hardened and ground dowel pins (EN-31 case-hardened to 58–62 HRC), hydraulic and pneumatic swing clamps with sequence valving, zero-point quick-change subplates, and rigid vibration-dampened baseplates ensuring repeatability within ≤ 0.005 mm (5 microns) under heavy cutting tool loads.
Workpiece rigidity and vibration dampening are achieved by modeling cutting tool force vectors during CAD simulation. Primary resting pads are CNC ground to parallelism within 0.005 mm over the entire fixture envelope. Sequence-controlled hydraulic swing cylinders apply uniform holding pressure without inducing part distortion, allowing aggressive roughing cuts and fine finishing in a single setup. For multi-part setups, individual pneumatic part-seating sensors confirm positive contact before spindle cycle start.
Types & Configurations We Build
Sizing and capacity calculations
Turning & Lathe Fixtures delivers rigid, repeatable part location and distortion-free clamping under high-speed milling, turning, and multi-axis machining operations. Fabricated from vacuum-hardened alloy steels (20MnCr5, EN-24, P20), normalized subplates, and modular DIN 650 T-slot grids, every fixture is engineered to eliminate part deflection, minimize cycle vibration, and ensure batch repeatability within ≤ 0.005 mm across high-volume automotive and aerospace production runs.
Sizing & Tonnage Calculations:
Clamping force is calculated directly against cutting tool torque, spindle power, and feed force, factoring a 2.5× safety factor against part lift-off:
Formula: Required Clamping Force (kN) = (Maximum Cutting Force Fc in kN / Friction Coefficient μ) × 2.5 Safety Factor
Example: For a heavy face-milling operation generating 4.2 kN tangential cutting force on a cast steel component (μ = 0.20), required hydraulic clamping force is 52.5 kN distributed across synchronized swing clamps.
Technical specifications and machine parameters
| Parameter / Specification | Standard Range / Feature |
|---|---|
| Tooling Category | Turning & Lathe Fixtures (Precision Workholding Series) |
| Positional Repeatability | ≤ 0.005 mm (5 Microns) Datum Repeatability |
| Locating Hardness | 58 to 62 HRC Vacuum Case-Hardened EN-31 |
| Clamping Mechanism | Hydraulic / Pneumatic Swing Clamps / Manual Cam Clamps |
| Machine Interface | Standard DIN 650 T-Slot Grid / Zero-Point Pneumatic Subplate |
| Inspection Certification | CMM Dimensional Inspection Report with Micron Coordinates |
| Manufacturing Origin | Designed, CNC Machined & Tested in Dahegam, Gandhinagar, Gujarat, India |
Material compatibility and engineering metallurgy
- Case-Hardened 20MnCr5 / EN-31: Carburized and hardened to 58–62 HRC for locating pins, rest pads, and high-wear wear plates.
- Pre-Hardened P20 Alloy Steel: Machined baseplates and tombstone bodies with uniform 28–32 HRC core hardness and zero residual stress.
- High-Tensile EN-24 / EN-19 Steel: Heavy-duty clamp arms, connecting links, and pivot pins for high-torque workholding assemblies.
- Hard Anodized Aluminum 7075-T6: Lightweight fixture plates and modular jaws for high-speed robotic tool changers and CMM setups.
- Phosphor Bronze / Brass Wear Pads: Non-marring contact pads for finished machined faces and delicate thin-walled components.
Procurement and tooling selection guide
Key technical considerations for precision workholding:
- Locating Kinematics: Verify 3-2-1 primary, secondary, and tertiary datum pins are diamond/round ground EN-31.
- Actuation Type: Select manual cam/toggle clamps for low-volume jobs, or hydraulic/pneumatic swing cylinders for automated CNC production.
- Chip Clearance & Coolant Flow: Ensure steep relief angles and chip evacuation slots prevent swarf buildup on locating faces.
- Modularity & Zero-Point Compatibility: Incorporate standardized pull studs and grid plates for rapid 2-minute changeovers.
Testing, inspection and global commissioning
HEMSUN ENGG. INDUSTRIES inspects all fixtures on coordinate measuring machines (CMM) before dispatch, verifying datum parallelism, perpendicularity, and positional tolerances. Trial part machining and clamping pressure holding tests are conducted prior to delivery.
Frequently Asked Questions
What does HEMSUN list under Turning & Lathe Fixtures?
Browse Turning & Lathe Fixtures from HEMSUN, India — compression moulding machines, PTFE parts, hydraulic presses, tooling and custom OEM/ODM.
Can I request a quote from the Turning & Lathe Fixtures catalog page?
Yes. Use the contact page or RFQ buttons on detail pages. Include part drawing, size list, or machine tonnage target so our engineering team can respond with scope and lead time.
Does HEMSUN export products listed in Turning & Lathe Fixtures?
Yes. IEC-registered export documentation is available for qualified orders worldwide. Domestic buyers receive GST invoice and standard dispatch documentation.