Home > Products > Connecting Rod Machining

Connecting Rod Machining

Product Overview

Connecting rod machining demands strict geometric control across functional interfaces to guarantee proper engine balance and bearing longevity. This equipment series is specifically designed for high-volume manufacturing environments. By utilizing dedicated workholding fixtures, high-speed cubic boron nitride (CBN) grinding wheels, and automated measurement feedback, the architecture maintains repeatable part quality across continuous multi-shift schedules.

Conveyor Belts For Connecting Rods

This type of conveyor belt is mainly used for automatic transfer of connecting rods along production lines. It requires no manual intervention, and the connecting rods move forward in a peristaltic,

Add to Inquiry
Connecting Rod Production Line

When installing this type of conveyor belt on an actual production line, the first things to consider are floor flatness and the overall horizontal level of the belt. Although the equipment already

Add to Inquiry
Connecting Rod Processing Line

Last year, we visited a connecting rod manufacturer whose old production line was more than ten years old. Transfer between processes relied entirely on workers pushing handcarts, and each person

Add to Inquiry
Automatic Production Line Of Connecting Rod

For many connecting rod processing enterprises, a production line often produces more than one model of connecting rod. Today it might be a passenger-car connecting rod, and tomorrow another model

Add to Inquiry
Connecting Rod Processing Technology

When a production line requires conveying connecting rods from one end to the other over a long distance, the layout design becomes very important. One advantage of this special conveyor belt is that

Add to Inquiry
Connecting Rod Workpiece Belt

If you see this type of conveyor belt in operation for the first time, its movement may look a bit strange. The V-shaped groove keeps moving back and forth, but the connecting rods slowly advance in

Add to Inquiry

Grinding Process & Working Principle

The machining workflow targets critical functional zones of forged steel or powder metallurgy rods:

Bore Grinding (Internal Grinding)

High-frequency electro-spindles paired with abrasive wheels execute finish grinding. Constant Surface Speed (CSS) control automatically adjusts spindle rotation as the wheel wears to maintain stable cutting dynamics.

Face Grinding (Surface Grinding)

Twin-disc or vertical surface setups process the connecting rod and cap joint faces simultaneously to achieve strict flatness and parallelism benchmarks.

Workholding Principle

Hydraulic diaphragm or precision V-block fixtures clamp pre-machined datums (bolt seat faces and guide sides) to completely eliminate clamping-induced distortion.

Machine Types & Configurations

CNC Internal Grinding Machines

Dedicated to big-end and small-end bore finishing, available in single or dual-spindle configurations for sequential or parallel machining.

Twin-Spindle Surface Grinding Machines

Engineered for high-throughput synchronous processing of cap and rod joint faces.

Turnkey Robotic Cells

Integrated with articulated robots, post-process air-gaging stations, and automatic wash units for unmanned manufacturing plants.

Workpiece & Processing Capability

Material Compatibility

Forged steel, powder metallurgy, and titanium alloys.

Component Dimensions

Center-to-center distance from 100 mm to 500 mm; bore diameters from 30 mm to 150 mm.

Achieved Tolerances

Bore Diameter Tolerance	+/- 0.002 mm
Roundness & Cylindricity	< 0.0015 mm
Surface Roughness (Ra)	0.2 um to 0.4 um
Bore Parallelism	< 0.005 mm per 100 mm length.

Technical Specifications

Specification Parameter	Standard Model	Heavy-Duty Model
Max. Workpiece Length	400 mm	650 mm
Bore Grinding Range	Dia 30 - 120 mm	Dia 50 - 180 mm
Grinding Spindle Speed	Up to 60,000 RPM	Up to 45,000 RPM
Total Connected Power	35 kVA	55 kVA
Machine Weight	6,500 kg	11,000 kg
Control System Architecture	Advanced CNC Bus Control	Advanced CNC Bus Control

Key Features & Machine Construction

Bed Structure

Cast iron Meehanite base optimized via finite element analysis, thermally stabilized to absorb high-frequency vibration during aggressive stock removal.

Spindle Thermal Control

Chilled liquid cooling jackets circulate temperature-regulated fluid around high-frequency motor stators, keeping thermal expansion below 0.003 mm after continuous operation.

Dressing Unit

Rotary diamond disc dressers integrated directly onto the work table provide automated profile compensation and wheel conditioning without removing the workpiece.

Coolant Management

High-pressure filtration units flush swarf instantly from the grinding zone, preventing thermal burns on finished functional surfaces.

Applications

Passenger vehicle inline and V-type engine block production lines.

Heavy-duty commercial vehicle diesel engines.

Marine propulsion and heavy locomotive internal combustion engines.

High-performance motorsport custom powertrain components.

Grinding Trials & Process Optimization

To eliminate technical risk prior to capital expenditure, processing capability is verified through structured test runs:

Sample Processing

Customer supplies raw forgings for trial machining under production-equivalent parameters.

Capability Study

Coordinate measuring machine reports and air-gage data verify process capability indices for critical dimensions.

Cycle Time Validation

Program tuning ensures adherence to strict takt time targets.

Manufacturing & Quality Control

In-House Machining

Bed castings undergo thermal annealing followed by precision CNC gantry milling.

Metrology

Geometric accuracy is certified using laser interferometers and dynamic testing instruments before dispatch.

Component Traceability

Critical motion control, hydraulic, and electrical assemblies utilize industrial-grade standard components.

Customization & OEM

Custom Fixture Engineering

Fixtures designed to match specific engine family geometries with quick-change hydraulic clamping jaws.

Automation Interface

Mechanical and electrical integration with existing gantry loaders or articulated robots via standard industrial communication protocols.

Special Software Cycles

Proprietary macro routines developed for non-standard measurement loops or specific geometric correction algorithms.

Installation, Training & After-Sales Support

Automatic Production Line Of Connecting Rod

Acceptance Testing

Factory acceptance testing conducted prior to shipping; site acceptance testing supervised by resident service engineers upon installation.

Technical Training

On-site training programs covering machine operation, program editing, dressing routines, and routine maintenance for plant technicians.

Service Response

Remote diagnostics supported via secure connection; critical replacement parts dispatched efficiently from regional logistics networks.

Selection Guide

When issuing a technical request for quotation for connecting rod grinding machinery, include the following parameters to streamline proposal generation:

Part Drawings

Submit CAD models outlining critical tolerances, datum surfaces, and stock removal limits.

Material Specifications

Material hardness, forging method, and microstructural details.

Production Volume

Target annual output, shift operations, and desired takt time per component.

Facility Infrastructure

Available floor space, electrical supply specifications, and central coolant system availability.

Frequently Asked Questions

Q: How does the machine compensate for wheel wear during high-volume production?

A: An acoustic emission sensor detects initial wheel-to-workpiece contact, communicating directly with an automatic rotary diamond dresser. After a pre-programmed cycle count, the CNC system commands a dressing pass and automatically executes work offset adjustments to maintain tolerance without manual intervention.

Q: What is the typical lead time for a custom connecting rod grinding machine?

A: Standard machine configurations require 16 to 20 weeks. Turnkey automated cells involving custom fixture design, prove-out trials with customer samples, and robotic integration typically require 24 to 30 weeks from order confirmation.

Q: Can a single machine handle both fractured-split connecting rods and traditional sawn-cut rods?

A: Yes, provided the fixture locating nests are configured correctly. Fracture-split rods require specialized locating pins matching the fractured surface geometry to prevent shifting during clamping, which is handled via interchangeable quick-change fixture sub-plates.

Q: What coolant filtration configuration is required to maintain surface finish integrity?

A: A multi-stage filtration system combining magnetic separators for ferrous swarf removal and paper band filters rated to fine micron levels is mandatory. High-pressure delivery is essential to flush chips out of the small contact zone.

Q: How are thermal expansion issues managed during multi-shift continuous runs?

A: Spindles feature closed-loop liquid chillers maintaining fluid temperatures close to ambient conditions. Additionally, linear scales equipped with thermal compensation algorithms feed real-time axis growth data back to the controller to neutralize positional drift.

Q: What data interfaces are supported for factory automation and Industry 4.0 integration?

A: The control architecture supports standard open industrial automation protocols. Machine status, operational data, alarm logs, and part measurement results from in-process gaging can be streamed directly to manufacturing execution systems or plant SCADA networks.

Rushan Shuangxing Machine Tool Manufacturing Co., Ltd. is one of the most reliable connecting rod machining manufacturers and suppliers in China, featured by quality products and low price. Please rest assured to wholesale durable connecting rod machining for sale here from our factory. Customized orders are welcome.

connecting rod material channel, connecting rod machining, Connecting Rod Processing Technology