a High-Rigidity Broaching Machine Specially Designed for The Machining of High-Precision Eccentric Cams

• Customization: Available
• After-sales Service: Provide
• Warranty: 1 Year
• Model NO.: EC4020
• Application: Metal
• Process Usage: Metal-Cutting CNC Machine Tools
• Movement Method: Contour Control
• Control Method: Closed-Loop Control
• Numerical Control: CNC/MNC
• Processing Precision: 0.01~0.02(mm)
• Performance Classification: High-End CNC Machine Tools
• Certification: CE, ISO 9001
• Condition: New
• Transport Package: Standard Export Package
• Trademark: UBRIGHT
• Origin: Cn
• HS Code: 8461300000
• Production Capacity: 100 Set

Product Description

Machine Introduction

 

The EC4020 Broaching Machine is a high-rigidity equipment specially designed for machining high-precision eccentric cams. Focusing on the production pain points of core transmission components for engineering machinery, it achieves quality improvement and efficiency enhancement through an integrated broaching process. Core benefits are as follows:

 

✓ Completes eccentric hole, positioning groove and end face machining in one broaching operation, increasing single-piece efficiency by 45%

 

✓ Adapts to a maximum workpiece diameter of 500mm, eliminating the cost of split machining and hidden risks of weld seams

 

✓ Flexible clamping + radial support, raising the qualified product rate by 40%

 

✓ Dual 45kW motors for balanced energy consumption, reducing energy use by 25% compared with multi-equipment joint operation

 

As a special equipment for eccentric cam machining, the EC4020 perfectly solves problems such as precision deviation and deformation in traditional processes, helping enterprises optimize production links.

The EC4020 Broaching Machine is a special equipment tailor-made for high-precision eccentric cams, with core parameters precisely matching the broaching requirements of eccentric holes, positioning grooves and end faces. Equipped with a stable pulling force of 400KN, a 2000mm long stroke and a maximum workpiece diameter of 500mm, it is powered by dual 45kW motors and features a single station for accurate clamping of heavy-duty cams. Its high-rigidity structure suppresses vibration, vertical downward broaching realizes gravity chip removal to avoid chip accumulation, and it is compatible with flexible tooling to prevent deformation, helping enterprises achieve efficient and high-precision production.

 

Workpiece Basics

Application: Eccentric cams are core transmission components of engineering machinery. They convert rotary motion into reciprocating/oscillating motion of driven parts through eccentricity, ensuring the operational stability of the whole machine.

 

Material/Geometric Features: Adopting alloy steel/45# steel (HRC28-32 after quenching and tempering), with a maximum diameter of 500mm, it has complex structures such as eccentric holes and positioning grooves, requiring strict control of precision tolerances like eccentricity and perpendicularity.

 

Common Risks: Traditional turning and milling processes are prone to hole shape distortion and position degree deviation; rigid clamping causes workpiece deformation; insufficient tool rigidity in deep hole machining leads to excessive surface roughness; small and medium-sized equipment cannot adapt to workpieces, and forced machining is likely to cause tool breakage.

Core Pain Points

Pain Point 1: Perpendicularity/coaxiality deviation between eccentric hole and end face

 

• Efficiency Impact: Process turnover increases production cycle by 30%
• Cost Impact: Rework cost increases by 200 CNY per piece
• Quality Impact: Defect rate as high as 15%

 

Pain Point 2: Cam clamping deformation

 

• Efficiency Impact: Tooling adjustment time increases by 15%
• Cost Impact: Scrap loss of 180 CNY per piece
• Quality Impact: Eccentricity error over-limit rate of 12%

 

Pain Point 3: Poor machining precision and low efficiency of positioning grooves

 

• Efficiency Impact: Multiple clamping and alignment increases time by 25%
• Cost Impact: Tool wear increases by 30%
• Quality Impact: Position degree over-tolerance rate of 10%

 

Technological Process

Complete Machining Link: Blank pre-treatment → Tooling and parameter debugging → Clamping and positioning → Broaching machining → Unloading and inspection → Post-treatment and warehousing

 

The EC4020 Broaching Machine is the core of the broaching process. With a 2000mm long stroke and a stable pulling force of 400KN, it completes the forming of eccentric holes, positioning grooves and end faces in one operation, connecting the preceding and subsequent processes to ensure precision. All links are seamlessly linked: pre-treatment ensures blank consistency, debugging calibrates parameters, clamping prevents deformation, inspection fully checks key indicators, and post-treatment improves surface hardness.

 

Key Points by Segment

1. Blank Pre-treatment

    

   Practice: Quenching, tempering and tempering of alloy steel/45# steel blanks (HRC28-32), descaling, deburring, and marking the center of eccentric holes by line drawing

    

   Parameters: Hardness control ±2HRC

    

   Risks & Control: Uneven hardness → Strict temperature-controlled heat treatment process

    

   Equipment: Box-type heat treatment furnace
    
2. Tooling and Parameter Debugging

    

   Practice: Adjust the 300mm pad hole positioning tooling, install broaching cutters for eccentric holes/positioning grooves, and set broaching parameters

    

   Parameters: Stroke ≤2000mm, cutting/return speed 12m/min

    

   Risks & Control: Parameter deviation → Trial cutting to calibrate eccentricity

    

   Equipment: EC4020 Broaching Machine
    
3. Clamping and Positioning

    

   Practice: Flexible clamping + radial auxiliary support for accurate positioning of the center of eccentric holes

    

   Parameters: Clamping force distributed to 3 support points

    

   Risks & Control: Deformation → Optimize support positions

    

   Equipment: Custom flexible tooling
    
4. Broaching Machining

    

   Practice: Vertical downward broaching with real-time monitoring of pulling force/vibration data

    

   Parameters: Pulling force 400KN, uniform cutting speed 12m/min

    

   Risks & Control: Overload → Built-in overload protection of the equipment

    

   Equipment: EC4020 Broaching Machine
    
5. Unloading and Inspection

    

   Practice: Automatic unloading, three-coordinate measurement of eccentricity, perpendicularity, etc.

    

   Parameters: Eccentricity tolerance ±0.02mm

    

   Risks & Control: Missed inspection → 100% inspection of key indicators

    

   Equipment: Three-coordinate measuring machine

 

 

Revenue Data

        

Indicator	Traditional Process	EC4020 Broaching Machine	Improvement Rate
Single-piece processing time	5h/piece	2.75h/piece	-45%
Finished product pass rate	60%	96%	+40%
Comprehensive energy consumption	100kW·h/piece	75kW·h/piece	-25%
Rework cost	200 yuan/piece	0 yuan/piece	-100%

 

Application Scenarios

• Scenario A: Mass Production for Engineering Machinery OEMs

   

  Process Package: Blank pre-treatment → EC4020 broaching → 100% inspection → Post-treatment; Equipment Configuration: EC4020 + mass production flexible tooling; Parameters: 2000mm stroke, 400KN pulling force; Quality Control: 100% inspection of eccentricity/perpendicularity.

   

  Comparison: Mass production cycle reduced from 10 days to 5 days (-50%), cost reduced from 1000 CNY/piece to 750 CNY/piece (-25%).
   
• Scenario B: Custom Machining for Maintenance Market

   

  Process Package: Rapid tooling debugging → EC4020 broaching → Inspection; Equipment Configuration: EC4020 + quick die change tooling; Parameters: Stroke adjusted on demand, speed 12m/min; Quality Control: Random inspection of position degree.

   

  Comparison: Customization cycle reduced from 3 days to 1 day (-66%), adapting to the demand for small-batch and multi-specification production.
   
• Scenario C: Deep Hole Eccentric Cam Machining

   

  Process Package: Blank → EC4020 broaching → Inspection; Equipment Configuration: EC4020 + deep hole broaching cutter; Parameters: 2000mm stroke, 400KN pulling force; Quality Control: 100% inspection of hole wall roughness.

   

  Comparison: Unmachinable by traditional processes → Completed in one operation, hole shape distortion rate reduced from 15% to 0%.

 

Parameters and Configuration

Pulling Force	400KN
Max Stroke	2000mm
Cutting Speed	12m/min
Return Speed	12m/min
Bolster Hole Diameter	300mm
Max Workpiece Dia	500mm
Main Motor	2×45kW
Workstation	1
Machine Height	5700mm
Floor Space	2500×3500mm
Weight	20t

 

Configuration Item	Description
Core Broaching Unit	400KN pulling force system + 2000mm long-stroke mechanism
Drive System	Dual 45kW asynchronous motors + variable frequency speed regulation
Fixture System	Flexible clamping + customized fixture with radial auxiliary support
Positioning System	300mm spacer hole precision positioning device
Safety System	Overload protection + vibration monitoring + emergency stop button
Chip Removal System	Vertical gravity chip remover
Detection Interface	Compatible with coordinate measuring machine data transmission

 

 

 

FAQ 

 

Q1: How does the EC4020 avoid clamping deformation of eccentric cams?

 

A: It adopts flexible clamping + radial auxiliary support tooling to disperse clamping force, reducing the eccentricity error over-limit rate from 12% to below 2%.

 

Q2: What is the maximum workpiece size adaptable to the EC4020?

 

A: The maximum workpiece diameter is 500mm and the pad hole diameter is 300mm, which perfectly covers the demand for eccentric cams of engineering machinery.

 

Q3: What is the continuous operation capability of the EC4020?

 

A: The dual 45kW motors provide sufficient power, the vertical downward broaching enables smooth gravity chip removal, supporting 24/7 continuous operation with a monthly failure probability of <0.5%.