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Structure of machine: introduced horizontal layout design. The host part of machine, main shaft, carriage and each box are all cast by good HT300 with a good rigidity and antiknock through aging. Coolant and feed system is parallel placed with the host part of machine. The host part of machine is divided into two parts: workpiece clamping system and two spindles tool feed and drilling system with totally enclosed protection, protective door equipped with safety interlocks device.
Positioning and clamping of workpiece: take the chamfer of the workpiece as the standard of positioning . Below is the picture of clamping system for reference。
Workpiece clamping uses manual loading method through hydraulic automatically to position and clamp the workpiece. Inner cone top is inside the chip removing guide box and workpiece spindle, position and clamp the workpiece through chamfer of workpiece and inner cone top, and provide the force of friction when drilling. For easy loading of workpiece, put a pre-positioning holder below the workpiece.
When processing, put the workpiece on the pre-positioning support, workpiece spindle stick out to the right, inner cone top on the right end of the spindle push the workpiece move to right until reaching the surface of chip removing guide box, through the chamfer of workpiece and inner cone top, position and clamp the workpiece. Then workpiece left the pre-positioning support, workpiece positioning clamp finish. Motor on the workpiece spindle box drive the workpiece rotary (or fixed).
This kind of clamping method is reliable and precise, except for load and unloads the workpiece, automatically processing under the CNC control during the whole processing procedure without drawing back the tool and a second time of clamping the workpiece. Processing high volume drilling concentric hole of rotary shaft parts through one drilling can get a high efficiency and precision standard (concentricity, roughness and hole diameter).
high pressure coolant filter system of our machine
High pressure coolant pump group: use gear pump and frequency motor , achieve the gear pump’s flow adjusting and fit for the processing of different hole diameter with a pressure adjusting, pressure monitoring and pressure display device(adjust by the button on the operation plate, number shows the system pressure)
Oil tank (oil capacity is 1200L): The oil tank is separated into two different area. One is un-filtered area, another is filtered area. Un-filtered area stores dirty cutting oil and filtered stores cutting oil after filtering. This structure avoid co-pollution between two kinds of oil. In un-filtered area, there’s oil returning path which is prolonged by special designation for better oil coolant and sediment of steel chip. Two area’s liquid balance is automatically controlled by float switch. When lack of oil, machine will alarm.
Filter and cooling of cooling oil
There are 5 levels filter system of cooling oil.
There is a magnetic chip remover under chip removing guide box’s entrance, it can be programmed and chip removing automatically.
Filter the cutting oil through medium density copper screw installing on the horizontal direction for the second time, remove the small iron chip ; Filter the cutting oil through high density copper screw installing on the vertical direction for the third time, remove the smaller iron chip; there is a narrow oil returning path in the oil tank, installing a strong magnetic filter device to strong absorb the subtle metal dust in the cutting oil, purity the cutting oil.
Drum paper tape filter is the final filter device, precision filter the cutting through high density nonwoven, the filter precision can reach to 20um. Drum paper tape filter, totally enclosed filter, automatic feed ,filter reliable.
Cooling: Installing a high-power oil coolant machine on the filtered oil area, forced cooling the cutting oil ,digital control the temperature of the oil to prolong the life of drilling tool and keep the processing precision of machine.
