CNC Deep Hole Drilling Machine For Rectangular Workpiece

CNC deep hole drilling and boring machine tool for drilling rectangular workpiece 

 

2. Machine Tool Overview

2.1 Processing method:

The machine has a drilling function.

Drilling: BTA drilling method, cutting oil is fed into the tool through the gap between the oil pressure head, the tool bar and the hole wall, and discharged through the inner hole of the tool bar with chips.

Working mode of machine tool: workpiece does not rotate, tool rotates, tool feeds.

2.2 Machine Tool Machining Range

Drilling range: Φ 40-Φ 120mm

Maximum machining depth: 2500mm

2.3 Main structure of machine tool

2.3.1 Main components of machine tools

Bed, workbench, oil pressure head, cutter bar support, drilling box, cooling system, control system, electric box, etc

2.3.2 Workpiece clamping: The machine tool is equipped with a T-slot table, and the fixture can be customized according to the customer's requirements

2.3.3 Machine Tool Control System

Control system: SIEMENS-808D

Z-axis: Longitudinal feed motion of drill pipe box, servo motor drives rack and pinion through servo reducer.

Main control contents: tool rotation, tool feed, cooling system, etc.

2.3.4 The foundation parts such as box body, bed body and pallet are precision cast with high-quality cast iron. After casting, they are subjected to two aging treatments to eliminate internal stress, stabilize the structure and size, and improve mechanical properties.

2.3.5 Bed and Table

The bed body and the workbench are cast with resin sand, and normalized after casting. Adopts a split structure, assembled together using high-strength bolts and positioned with tapered pins.

A helical rack is assembled in the tool bed, which is used for tool feed transmission. The rack is precision machined and quenched. The machine tool has large load bearing, sufficient rigidity and stable transmission

Machining T-slots on the bench for mounting fixtures.

V-shaped inclined bars are arranged inside the bed body, which has high support strength and is not easy to deform; The outer wall of the bed body directly supports the guide rail, the guide rail can bear large cutting force, the guide rail has good rigidity, and is not easy to deform and shake in the processing process, which is beneficial to improving the processing quality and efficiency of the machine tool.

An oil return groove is cast around the bed body and the workbench, an oil retaining cover is installed on the oil return groove, and the cutting oil is automatically returned to the cooling oil tank.

2.3.7 Oil pressure head

Used for tool guiding, tool oil supplying and tool bar supporting;

The oil dispenser is installed in the middle part of the bed body, and the oil dispenser moves axially under the control of the hydraulic system to tighten and loosen the workpiece.

A tool bar support sleeve is installed at the right end of the oil dispenser, which is used to support the tool bar.

The guide sleeve is installed at the left end of the oil dispenser, and the guide sleeve is used for guiding the tool.

2.3.8 Drilling box

For driving cutter rotation, mounted on feed pallet.

The servo spindle motor drives the spindle to rotate through belt, pulley and gear train.

The left end of the spindle is fitted with a tool holder connecting sleeve for clamping the tool.

A chip discharge hopper is installed at the right end of the spindle for discharging chips.

Made by precision grinding of gears; The gear tooth surface is treated with high frequency quenching, so that the gear can obtain high strength, high hardness, high wear resistance and high fatigue limit, and can bear relatively large alternating load and impact load.

The external lubricating oil tank is used for circulating lubrication of gears and bearings, and a low level alarm device is installed in the oil tank.

Appearance diagram of drilling box

2.3.9 Toolbar Bracket

For supporting a tool bar;

It adopts a high rigidity integral structure with a support sleeve on it, which can absorb the impact and jitter generated in the processing process.

Install the automatic hanging and pulling mechanism, when the tool is withdrawn, the feed pallet can automatically pull the tool bar bracket back to the initial position.

 

Appearance diagram of tool holder bracket

2.3.10 Cooling System:

It is mainly composed of cooling pump, chip receiving box, oil tank, etc., which provides enough cutting oil for deep hole processing.

Above-ground fuel tank, the fuel tank is fully welded with high-quality steel plate.

Install a telescopic protective cover between the chip receiving boxes on the fuel tank to cover the fuel tank and avoid debris falling into the fuel tank.

The pressure, level, temperature and flow of cutting oil can be displayed digitally on the control station.

Diagram of cooling system

2.3.11 Feed Pallet

Used to drive the axial movement of the tool.

The automatic lubrication station is used for the time and quantitative lubrication of the sliding rail surface.

A button plate is installed on the pallet, which has the functions of drill pipe box spindle jog, feed forward, feed backward and emergency stop.

2.3.12 Lubrication System

The sliding guide rail surface of the feed pallet is lubricated by automatic lubrication station at time and quantitatively, and has the function of low liquid level alarm.

The drill pipe box bearing is lubricated by automatic lubrication station at time and quantitatively, and has the function of low liquid level alarm.

The toolbar support plate is lubricated with a manual lubrication pump.

 

Contact : Lean Lee 

Mob :008615153489973

Email: export@dzguanlu.com

 

 

 

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