How to Prevent Tungsten Carbide Broach Without Failure When Broaching?

Tungsten carbide broach not prevent failure when broaching, you can take the following measures:

1, requires pre-hole precision IT8 ~ IT10, the surface roughness of the Ra≤5μm, prefabricated holes and positioning the end face of the vertical deviation of not more than 0.05mm.

2, strict inspection Carbide broach manufacturing precision. For outsourcing can broach teeth liter volume chip space and broaches strength check.

3, broaching performance and difficult to machine materials, you can select the appropriate heat treatment to improve the workability of the material, often using carbide high-performance materials or coatings broach broach.

4, storage, transportation Carbide when broaches, broach prevent bending and damage the teeth.

Tungsten Carbide Broach Broaching Faults and Solutions

There may tungsten carbide broach the production process will be a variety of failures, thus affecting Carbide broaches broaches broaching the quality and longevity, and even damage the tool. Carbide broach damage was due mainly to the teeth when broaching the pressure too much, not enough strength to pull a knife. Carbide Broach caused by excessive force teeth for many reasons, such as: pulling teeth liter excessive bending Carbide broaches, broaching the cutting edge of each point margin uneven, cutter radial runout large, prefabricated hole too rough, hard spots inside the material, workpiece strength too seriously sticky crumbs and chip flutes such as congestion and the workpiece clamping skew.

Tungsten Carbide Broach Eliminate Surface Defects When Broaching Method

1. To improve the quality tungsten carbide broach sharpening teeth and prevent edge chipping produce and maintain sharp edge, each tooth rake and the same width.

2. To maintain the stability of broaching process, while working to increase the number of teeth, reduce fine incisor teeth and tooth pitch calibration, broaching process systems to improve rigidity.

3. The rational use of broaching speed, resulting in the production of reptiles often encountered in practice due to the low speed broaching broaching, broaching speed is too high there will be vibration. In addition, the impact speed broaching broaching surface quality, wear and pull broaching rate important factor knife.

4. The use of tungsten carbide broaches, broach coating, laser hardening high-speed steel broaches, etc., which have a good surface quality broaching role in improving the speed of broaching, broach reduce wear and increase life expectancy and improve broach.

5. The rational use of cutting fluids and the full cast. For example, when broaching carbon and alloy steel, if the choice of extreme pressure emulsion, curing and processing oil extreme pressure additives to improve broach cutting oil life, significantly reducing the surface roughness effects.

Tungsten Carbide Broach Broaching of Surface Defects

Tungsten carbide broach in broaching process, factors broaching surface defects are mainly crowded highlights, scales thorns, scratches, burnishing, circular ripples and bite knives. Factors that cause surface defects when tungsten carbide broach broaching have slight edge passivation or chipping, edge sticky crumbs, cutter blade with too much or uneven width, rake angle is too large or too small, broaching produced during vibration. If the surface roughness qualified, but when you scratch defects generated, you can check if there are bumps cutter blade gap; if there has not been cleaned chips attached to the cutter; Broach tolerance after repeated sharpening shavings whether or not caused by the shape of the groove smooth stepped to cause the chip curling is not smooth and squeeze bad. Teeth and scratch the machined surface and the like. In addition, if the pre-processing of oxide on the surface of the hole may also cause localized bumps and scratches tooth defects.

Tungsten Carbide Broach Composition Structure

Although a wide range of tungsten carbide broach, but the composition of the structure are similar. Such as standard round hole in the structure and composition of tungsten carbide broach generally: the handle portion, and its role is to pull the knife holder and the transmitting power; neck, the role of the ligation; the transition cone, the leading portion of the broach is introduced workpiece; preamble portion, play a guiding role in avoiding broach skew; cutting teeth, cutting the work completed by the coarse and fine cutting teeth gnashing of teeth composition; alignment of teeth, from the repair of light and calibration effect, and as a fine tooth gear cutting reserve; rear guide after the prop handle, bearing the Torah knife; Ministry for supporting the workpiece to prevent tooth cut off antecedents sagging and damage the machined surface of the workpiece and the cutter.

Tungsten Carbide Broach the Classification and Uses

Tungsten carbide broach generally used for overall manufacturing high-speed steel, tungsten carbide broaches often as modular, due to higher productivity, longer life expectancy and other characteristics, often in the automotive industry in the processing block and bearing caps, etc. parts. Carbide broach classification from parts machined surface, broaches structure and use three different methods to divide. According to the surface to be machined can be divided into different parts and outer Broach Broach two kinds; press tungsten carbide broach monolithic structure can be divided into broaches, broach welding, assembly-type broaches and broach tipped four kinds; by the use of different methods can be divided into broaches, push knives and rotary broach three.