Is the left and right edge rake angles of thread turning tools the same why

No, in the case of a right-handed thread, the trailing angle of the left edge is larger. In the case of left-hand threads, the trailing angle of the right edge is larger. Because the spiral rise angle of the thread is relatively large, when cutting, the rear angle of the corresponding surface of the turning tool is offset, and the corresponding turning tool rear angle must be increased, otherwise the flank surface of the turning tool will be pushed to the product, and the qualified product cannot be processed.

When threading, due to the influence of the spiral, the position of the cutting plane and the base surface changes, so that the value of the rake angle and the rear angle of the turning tool is different from the sharpening angle and the grinding angle, and the degree of change depends on the size of the thread rise angle of the workpiece. Generally speaking, turning ordinary small pitch threads has little impact, but when turning rectangular threads, trapezoidal threads and other threads with large pitches, the impact is relatively large. Therefore, when we sharpen thread turning tools, we must consider the influence of the thread rise angle of the workpiece.

When sharpening thread turning tools, if the cutting angles of both sides of the turning tool are sharpened according to the general external turning tool, it may make the turning tool unable to cut into the workpiece smoothly during turning, and serious friction will occur on the thread tooth side in the direction of the tool, resulting in scars and affecting normal turning. If the rear angle is worn too large, the strength of the thread turning tool will be significantly reduced, and it is very easy to wear and vibration during cutting, and even chipping. This phenomenon changes with the size of the outer circle and pitch of the workpiece.

Therefore, it is necessary to select the correct value of the relief angle of the thread turning tool.

It should be the same, and the knife should also be loaded correctly, otherwise the angle will be incorrect.

No, the multi-head thread is more obvious.

Summary. There are several reasons why thread cutter turns out that the thread is flat:

1.The outer circle car is smaller.

2.The thread depth of the car is not enough.

3.The thread turning tool has a smaller profile angle.

What is the reason why the thread is flat when the thread is turned out.

There are several reasons why the thread cutter car is flat: 1The outer circle car is smaller. 2.The thread depth of the car is not enough. 3.The angle of the thread turning tool is smaller.

Hope it helps!

It's an internal thread. The outer diameter is too small or the feed is not as deep as it should be. Assuming that your car is an external thread, first of all, the outer diameter of the workpiece should be turned out according to the outer diameter of the thread, and then the thread cutter should be selected according to the thread size of the required turning (mainly selected according to the thread angle), and then gradually feed to the due depth.

If the depth is too shallow, the inner diameter of the thread and the source type of the tooth will definitely not meet the requirements.

Hope it helps!

1. The selection principle of the rake angle and the inclination angle of the turning tool is different.

The principle of selecting the rake angle of the turning tool: when the strength and hardness of the workpiece material are low and the plasticity is good, a large rake angle should be taken; Otherwise, a smaller rake angle should be taken; Machining of extra-hard materials (such as hardened steel, chilled cast iron, etc.) can even take negative rake angles; When the bending strength and toughness of the tool material are high, a large rake angle can be taken;

When intermittent cutting or fine work, a smaller rake angle should be taken, but if there is a large auxiliary edge inclination angle at this time, a larger rake angle can still be taken to reduce the radial cutting force; When cutting at high speed, the influence of the rake angle on chip deformation and cutting force is small, and a smaller rake angle can be taken; When the rigidity of the process system is poor, a large rake angle should be taken.

The selection principle of the blade inclination angle: the cutting edge inclination angle should be taken as a positive value during finishing, so that the chips flow to the surface to be worked towards, so as not to scratch the machined surface; For intermittent cutting with large impact load, a large negative edge inclination angle should be taken to protect the cutting edge and improve cutting stability.

When processing high-hardness materials, negative inclination angles can be taken to improve the strength of the tool; Finishing tools for micro cutting can have particularly large inclination angles; The inclination direction of the cutting edge of the hole making tool (such as boring cutter and reamer) should be determined according to the nature of the hole.

When processing through holes, be cautious, and take the positive edge inclination angle, so that the chips are discharged from the front of the hole, so as not to scratch the wall of the Chunfeng hole; When machining blind holes, a negative edge inclination angle should be taken to make the chips drain backwards.

2. The angle definition of the front angle of the turning tool and the inclination angle of the cutting tool is different.

The inclination angle of the turning tool is: the angle between the cutting edge and the base surface. The rake angle of the turning tool: is the angle between the rake face and the base surface. The cutting inclination angle of the turning tool is the angle between the main cutting edge and the base surface in the cutting plane, and its main function is to control the chip flow direction and determine the strength of the cutter head;

The rake angle of the turning tool is the angle between the front of the turning tool and the base surface, and its main function is to make the cutting edge of the turning tool sharp, reduce the cutting deformation, make the cutting labor-saving, and the chips are easy to discharge.

3. The front angle of the turning tool and the inclination angle of the cutting tool have different functions.

Rake angle effect: the angle between rake face and base surface, and the rake angle is measured in the main section. Enlarge the rake angle, the tool is sharp, the deformation of the cutting layer and the friction resistance of the front chip are small, the cutting force and cutting temperature can be reduced, and the built-up edge can be inhibited or eliminated, but the rake angle is too large and the tool tip is strong.

Tip inclination: The angle between the main cutting edge and the base surface, measured in the main cutting plane. The direction of chip outflow can be controlled; Appropriate cutting angle can make the cutting edge gradually cut in and out of the gongbo, so that the cutting force is uniform and the cutting process is balanced; A negative inclination increases the impact resistance of the cutting edge, but an excessively large negative inclination increases the radial cutting force significantly.