Changsha Epoch Direct Drive Technology Co., Ltd.

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ETK2406C Rough Boring Machine

Function Introduction: This machine tool is mainly used for semi-finishing piston pin holes, finishing snap ring grooves, and chamfering pin holes inside and outside.
It adopts a SIEMENS 828D dual-channel CNC system. The Z1 and Z2 axes are driven by AC servo motors respectively; the left and right radial servo systems (X1 and X2 axes) are driven by servo motors respectively. The left and right expanding knife boring heads cause the boring bar to radially offset, thus completing the semi-finishing of the piston pin hole, the finishing of the retaining ring groove, and the internal and external chamfering of the pin hole.

Technical Parameter
Describe

Commodity name: ETK2406C Rough Boring Machine

Serial Number	Item	Unit	ETK2406 C
1	Piston pin hole diameter range	mm	Ф25～Ф60
2	Piston outer diameter range	mm	Ф80～Ф160
3	Maximum effective offset of boring bar on single side	mm	5
4	Surface roughness	μm	Ra3.2
5	Spindle rotation accuracy	mm	0.01
6	Maximum spindle speed (variable frequency stepless speed regulation)	rpm	1500
7	Machining diameter variation	mm	±0.03
8	Circlip groove bottom diameter runout	mm	≤0.06
9	Pin hole coaxiality	mm	≤0.03
10	Variation in distance between the stop collar locating surface and the pin hole axis	mm	≤0.03
11	Main unit (length × width × height)	mm	2680×1430×2135
12	Net weight of main unit	Kg	4200
13	Total power	Kw	20

Main Machine Configurations:
1. Basic Components
The machine's base, slide, spindle housing, and other basic components are made using high-strength casting technology, with a stable internal microstructure. The casting structure has undergone machine dynamics analysis and finite element analysis to optimize its geometry and ensure high rigidity. The wide and solid machine base, with its full-support load design, adheres to advanced material mechanics design principles, ensuring load capacity during processing.
2. Numerical Control (NC) and Electrical Control Systems
Utilizes a SIEMENS 828D dual-channel numerical control system, offering ease of operation, high reliability, and excellent stability. The NC programming and automatic processing procedures for the piston are all instruction code-based, simplifying programming. The interface is aesthetically pleasing, clear, and feature-rich.
3. High-Precision Spindle Unit
The spindle is of type A2-5, supported by precision spindle bearings and uses grease lubrication, ensuring high accuracy and long service life.
4. Radial Servo System
An AC servo motor drives the push rod, causing radial offset of the slide of the expanding knife grooving head. The specific offset amount is controlled by programming.
5. Positioning and Clamping
The piston is positioned using a stop + internal cavity elastic block, and clamped by a hydraulic cylinder.
6. Lubrication System
Employs a timed and metered (adjustable flow rate) automatic lubrication system, automatically supplying oil to the guide rails, screws, and other moving parts as needed, avoiding waste and reducing environmental pollution.
7. Others
The machine is equipped with a fully enclosed protective cover, a high-flow cooling system, and is aesthetically pleasing, safe, and leak-proof. The chip removal device is simple, environmentally friendly, practical, and reliable.

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