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Something About the Production of Taper Shank Twist Drill Bit

The morse taper shank twist drill bit has the production technology of milling and extrusion

The milling production method requires a high-power milling machine

The rough material of the twist drill is a fixed-length material, which has a large amount of waste and low efficiency

Taking φ40 As an Example

1. It can be used for up to 8 hours in a φ40 specification
2. With high power consumption, low efficiency, and no increase in extrusion products, it can produce about 30 drill bits

Installation of Taper Shank Drill Bit:

1. Slowly lift the drill bits box body, place the four legs of the drill box body into the four holes of the rig turntable
2. Select the corresponding drill box core plate
3. Then The groove of the installed drill bitcorresponds to the convex tip of the core plate of the drill bit box
4. When the morse taper shank drill bit is put the drill bit into the drill bit box, the drill bit is clamped on the turntable core
5. Then screw on the morse taper shank drill bit to connect the nut to the drill pipe

Method Use of Morse Taper Shank Drill Bit

1. The taper shank twist drill bits blade is maintained at a constant speed from front to back
2. It is moderately ground from the edge to the back when the blade is in contact with the grinding wheel
3. It is to grind down the grinding wheel at a constant speed along the back of the blade
4. At the same time pay attention to eye observation, both hands cooperate
5. Observe the size of the spark generated by the sharpening knife
6. The spark indicates that the force given by the hand is large
7. The temperature caused by the high friction is high

Points to Note When Sharpening

1. When sharpening the knife, keep the blade swinging up and down at a uniform speed
2. Do not tilt the tail of the drill while the blade is swinging, so as not to be rolled
3. Pay attention to this work detail, the blade is evenly swinging up and down
4. After the one side of the twist drill with the taper shank is ground, follow the method to grind the other side
5. The knife edges on both sides should be kept symmetrical so that both sides are well ground
6. Hold the knife in front of the light to look at the blade, if there is light on the blade, it means that need to sharp it

The Reason for the Twist Drill Design

1. The morse taper shank drill bit have an inverted cone shape to reduce the friction between the guide part and the hole wall during drilling
2. The helix angle affects the size of the rake angle on the cutting edge, the strength of the blade and the chip removal performance
3. The helix angle is usually 25 ° to 32 °

Drilling Process of Morse Taper Shank Twist Drill Bits

1. Determining the feed rate: The feed rate is generally based on experience
2. Positioning: Hit a positioning point in the center of the position where the hole is to be drilled or use an alloy needle to draw a “ten” line to ensure the accuracy of the drilling position

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