Deep holes generally refer to holes with a length to diameter ratio greater than 5, and deep hole machining has always been a major challenge in mechanical processing, as well as a bottleneck that restricts the production and processing process. As a manufacturer of precision and complex cutting tools, we have always adhered to the mission of being a good tool for the manufacturing industry, and efficient machining is the theme we constantly explore.
Machine clip type gun drill, also known as reversible gun drill, deep hole drill bit, drill bit drill, etc., is a type of external chip discharge deep hole drill bit. It is mainly composed of a tool head base, a drill rod, a drill shank, an rotatable cutting blade, a guide bar, and a Phillips screw.
01
Advantages of clamp type gun drill
Excellent hole roundness, straightness, and surface roughness: The cutting edge geometry and guide bar position design based on BTA technology achieve the best drilling effect;
Excellent chip breaking effect: The blade is a standard coated blade with a built-in chip breaking groove, designed with a positive rake angle structure, which is very conducive to chip breaking during deep hole machining; The generated iron filings are short and will not wrap around the blade or scratch the walls of the parts' holes;
Extremely high processing efficiency: suitable for high feed processing, the processing efficiency is about 1.5 to 3 times higher than that of ordinary welding gun drills;
Good economy: Replacing the blade is time-saving and easy. After the drill bit wears out, only the blade needs to be rotated or replaced without dismantling the drill rod;
According to the processing parameter data range of the processed material, the tool line speed Vc (40-120) m/min, feed rate f (30-120) mm/min, processing accuracy can reach IT7~IT10, and surface roughness Ra0.4~Ra3.2.
02
Application field
Automobile manufacturing: cylinder head, cylinder head, crankshaft, steering gear rack, camshaft, valves;
Mold industry: waterway holes, ejector pin holes, runner holes, guide column holes, etc. in molds;
Oil pump nozzle: Processing of fuel injector gas, needle valve hole, plunger sleeve and other parts;
Coal mining machinery: deep hole machining on piston rods, active columns, cylinder walls, and electro-hydraulic valves;
Textile and hydraulic: valves for hot roller bodies, various spindle holes, and hydraulic machinery industries;
Electric power and steam turbine: deep holes on the rotor, core shaft, valve stem, outer cylinder of the unit, and condenser tube plate.
field application
Processing Parameters
Material: 304 stainless steel
Hole depth: 210mm
Aperture requirement: Φ 14 ± 0.1mm
Speed: 1100r/min
Feed rate: 90mm/min
Coolant pressure: 2.2MPa
Pore roughness: Ra3.2-1.6
Hole size: 14.00-14.03mm
Lifespan: Approximately 25 meters per cutting edge
Application conclusion: Help customers double their efficiency on the basis of their original level, and save about 50% of overall costs
duration
On site drilling pipe plate
03
Machining center drilling process
① Drill guide hole diameter tolerance: 0.01-0.03mm Hole depth: 15-20 mm, please use a high rigidity drill bit to machine the guide hole
② Start the coolant
③ Slowly enter the guide hole, speed: n=30-80r/min, feed rate: Vf=100-200 mm/min
④ When the drill bit enters the guide hole at a depth of 15 millimeters
⑤ Start spinning at full speed
⑥ Start drilling at a depth of 15-25 mm at the entrance, feed rate: f=70% of programmed feed rate, feed rate: f=100% for hole depth ≥ 25 mm
⑦ For through holes, drill until the drill bit passes through the workpiece by approximately 6 millimeters
⑧ Stop spindle rotation and turn off coolant
⑨ Return drill bit
04
Form of interchangeable gun drill
Selection of cutting blades
Guide selection
