• Dezhou Guanlu Precision Machinery Manufacturing Co., Ltd.
  • Address: Shandong province Dezhou City Economic Development Zone Industrial Park East seven shop
  • Tel: 0534-7766069
  • Fax: 0534-7766069
  • Machine tool sales department: 15166987816
  • Email:dzysjx@yahoo.com

Deep knowledge

Deep hole machine knowledge:

Machining knowledge of gun drill

Deep hole gun drilling, also called deep hole drilling. Originally applied to weapons manufacturing industry, hence the name of gun drill, along with the continuous development ofscience and technology of deep hole machining system manufacturer's unremitting efforts, the deep hole processing has become a convenient and efficient processing method. And is widely used in such as: automobile industry, aerospace industry, structure building industry, medical equipment industry, mold, tool, fixture, industrial and oil pressure air pressure industry etc..

Gun drill is an ideal solution for deep hole processing, the use of the gun drill can obtain a precision processing, processing by the hole position precision, linearity, high coaxiality, and has the very high surface finish and tiny deviation. Capable of deep hole convenient processing of various forms of. In practical application, through a first hinge processing instead of processafter drilling, but also has very strong reliability technology.

The gun drill can drill cast iron, carbon steel, copper, aluminum alloy, alloy steel and so on, he will be drilling, boring, reaming once completed, the knife go for a can of processing high precision (grade IT8-11), fine linearity (0.16-0.5mm/1000mm) and low roughness (Ra6.3-Ra0.8)hole. The drilling line speed of 30-100 M / min or more.

Gun drill is mainly used for drilling holes diameter range is greater than in 1.5mm-38mm, theratio of length to diameter of drill bit diameter X150 times refers to. (that is, the maximum drilling depth), high pressure coolant through spindle and bit center to reach the cutting part. Iron by V type groove drill the discharge.

Gun drill instructions

1, when in use, you must first select a size suitable for the guide sleeve, the guide sleeve head and gun drill clearance is maintained within 0.003mm--0.008mm, machine tool spindle using thegun drill must have high axial and radial stiffness, the guide sleeve and the spindle must havehigh axiality. In the process of drilling, the material is processed (especially casting) drilling position there should be no fracture, porosity and other impurities, otherwise it will causechipping, and even turn around. Use should be the correct selection of cutting parameters. The cutting speed under normal circumstances,: V=1.1-1.65 M / s, the amount of feed: s=0.015-0.03mm / rev, oil pressure: P=2.5-6.0Mpa, flow: Q=0.2-0.65 L / s.

2, gun drilling cutting fluid used is also very important, it directly affects the accuracy of themachined hole. Be sure to choose a special gun drill for oil. General gun drill used cutting fluiddue to extreme pressure additives, in order to ensure the oil film formed under high pressure,prevent dry grinding. Viscosity and diameter of drill cutting fluid is concerned, the smallerdiameter, the lower the viscosity. Compared to cutting oil gun drill cutting area and the generalmechanical processing has the characteristics of high pressure, large flow, high filtering precision. Flow rate should be increased with the increase of Kong Shen, in order to ensurecutting oil has a greater flow rate, to achieve the purpose of smooth chip removal.

3, the gun drill bit wear, the need for timely correct edge grinding, edge must be in the universalcutting tool grinder or special grinding machine will gun drill arranged on a special fixture for sharpening grinding, resin bonded diamond grinding wheel can choose the size of about 120 forgrinding, grinding after each edge grinding away only in surface. We must ensure that the geometric angle of the right (we provide drawings) and edge position.

BTA process knowledge

Different coolant into his scraps and discharge mode is BTA mode and the gun drill drilling. BTA through the grant will oil cutting oil into the cutting part, and then through the cutting oil with iron into the drill bit and drill pipe outlet. If drilling large holes words (above 40mm), BTA drilling modeis preferred.

The application mode of BTA machine tool

Bore (diameter range 30mm-120mm)

Bore (diameter range 35mm-1200mm)
Jet drill (special machine)
Pull boring and drilling (special machine)
Set of material
Wiper roll
At the bottom of the opposite sex
Bottle of boring