Impact broaching quality and cemented carbide broach life, severe damage to broach cemented carbide broach the structure and use of common production problems. Longer ills and measures are summarized below:

1.To prevent cemented carbide broach fracture and tooth damage

Broaching cutter excessive force, broaches strength is not enough, is the damage cemented carbide broach the main reason. Caused by cutter tooth force many big factor, example: broach teeth liter excessive broach bending points of the cutting edge broaching margin uneven, radial round beating large cutter, prefabricated hole is too rough, materials internal hard spots, the workpiece strength is too high, the serious stick crumbs and chip flutes congestion and workholding skew. To cemented carbide broach smooth broach, the following measures can be used:

1) Requires the prefabricated hole accuracy IT8 IT10, surface roughness degree Ra ≤ 5 μm, prefabricated holes and positioning the end face perpendicularity deviation does not exceed 0.05mm.

2) Strict inspection of manufacturing precision broaches. The amount of tooth liter for outsourcing broaches, the chip space broach strength check.

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

4) The custody, transport cemented carbide broach bending deformation and damage the cutter to prevent.

2.Eliminate broaching surface defects

Broaching the surface scales thorn longitudinal scratches, indentation, burnishing, annular corrugated and eating knife is common defects that affect broaching the surface quality, a lot of reasons for its formation, including: edge passivation or small chipping, cutting edge sticky crumbs, cutter blade with too wide or the width of inequality, the rake angle is too large or too small, vibration, etc. broaching process.

Eliminating broaching defects and improve the surface quality of the broaching ways:

1) improve the quality of cutter sharpening, to prevent the edge from chipping and maintain a sharp edge. The rake angle of each tooth, and the blade width is consistent.

2) Keep broaching process stability increase while the number of teeth reduces the fine grinding of teeth and calibration teeth pitch to increase the rigidity of the broaching process system.

3) Reasonable selection of broaching speed, often encountered in the production practice crawling speed is very low due to broaching speed is too high there will be vibration. In addition, the broaching speed is important factors that affect broaching the surface quality and the rate of wear and broaching, broaches.

4) Use a cemented carbide broaches, broach coating, laser hardening high-speed steel broaches, broaching speed, reducing wear broaches life and to improve the surface quality of broaching have a good effect.

5) a reasonable choice with the full cast of the cutting fluid. The broaching of carbon steel and alloy steel, for example, if the optional extreme pressure emulsion, sulfurized oil and processing of extreme pressure additives cutting oil to improve the life of the broach, to reduce the surface roughness have a significant effect.

Chinatungsten Online can provide various sizes and grades of cemented carbide cutting tools, non-standard products are also customized according to customer requirements. Welcome to consult and purchase sales@chinatungsten.com, sales@xiamentungsten.com .