CNC Knowledge: What are the different stems of the treatment center? How much do you know?

Although managing the knife handle every day, do you know what 7: 24 means in the handle of the BT knife? What are the standards of BT, NT, JT, it, cat? Today, I’m going to tell you about the knowledge of the handle of the treatment center.

The knife handle is a connector of machine tools and tools. Tongshu can determine whether the cutting quantity of the cutting part of each cutting part is uniform in the event of a knife rotation;

1. Two main categories according to the cone of the main axis

The cone of the spindle of the treatment center is generally divided into two categories:

1) SK Universal Knife Handle with a cone of 7: 24

2) Handle of HSK vacuum knife with a cone of 1: 10

SK Universal Knife Handle with a cone of 7: 24

7: 24 Referred to the knife handle cones with 7: 24, which is a surface positioning of the separate cone. The surface of the cone must play two important role at the same time, that is to say the precise positioning of the handle compared to the main axis and the implementation of the handle.

advantage:

Without automatic blocking, you can get fast loading and unloading tools;

default:

When a rotation at high speed, the front end of the main axis will extend, and the size of the expansion increases with the increase in the rotation radiation and the speed. Lever, the axial displacement of the handle will also be a change. The radial size of the knife handle after each knife changes, and there is a problem with the accuracy of unstable positioning.

GM rods with a cone of 7: 24 generally have five standards and specifications:

1) International standard IS0 7388/1 (called IV or IT)

2) Japan Standard Mas Bt (called BT)

3) German DIN German 2080 (called NT or ST)

4) US Standard ANSI / ASME (called cat)

5) DIN 69871 (called JT, DIN, DAT or DV)

Tightening method:

The NT knife handle is tightened through the traditional machine path.

Universal:

1) At present, the most used in China are the two types of DIN 69871 (that is to say JT) and the type of Japanese mas;

2) The Handle of the DIN type 69871 can also be installed on the machine-tin machine of the Ansi / ASME pin spindle;

3) The IS0 7388/1 international knife handle can also be installed on the DIN machine-tool 69871, the Pores de Braquer d’Ansi/ASME, therefore in terms of universality, the handle of the IS0 7388/1 knife handle is The best.

HSK vacuum knife handle with 1: 10

The HSK knife handle is deformed by the elasticity of the knife handle.

The HSK vacuum knife handle can improve the rigidity and stability of the system and the precision of the product to a high -level treatment and shorten the time of the tool replacement. The HSK tool system is widely used in the manufacturing industry of aerospace, cars, precision molds.

The HSK knife handle includes a variety of specifications such as type A, B, C, D, D, E and others.

The maximum difference between type A and the type:

1) Type A has a transmission location and there is no type E. So, relatively speaking, the type A transmission torque is large, and it can be reduced for relatively. The type E type E type E is relatively small and can only be cut with a light cut.

2) In addition to the transmission slit on the type A handle, there are manual fixing holes and steering grooves, so the balance is relatively mediocre. There is no type E, so the type E is more suitable for high speed treatment. The type E mechanism is completely consistent. In other words, the diameter of the F63 and F63 is φ63, but the size of the cone of the F63 is the same as the size of the E50. Consequently, compared to E63, the speed of F63 will be faster (the main axis bearing is small).

2. Shape of knife handle loaded with a knife

Spring chip knife handle

It is mainly used for exercises, strawberries, taps and other knives and tools with straight handle.

Hydraulic chip

A lock screw, tighten the lock screw with the interior hexagon key;

B-Location the piston and press the hydraulic environments in the expansion room;

C – the expansion chamber, which is under pressure by liquid compression;

D-Thin Expansion Band, knife in the center of the clip stone in the center of the clip and wrap evenly.

E – Special sealing parts to ensure ideal sealing and long life.

Heating handle

Apply induction heating technology The heating technology to cure the part of the knife back of the knife, so that its diameter inflates, then put the cold knife in the heating handle. The handle of the heating knife is strong, the dynamic balance is good and it is suitable for high -speed treatment. The precision of repeated positioning is high, generally 2 μm, and the radial blows within 5 μm; However, each specification of the knife handle is only equipped with a tool with a handle diameter, and a set of heating equipment is required.

The principle of the heat knife handle luminaire:

Complete handle assessment: Complete evaluation:

Other types of knife handle