CN2546124Y - 90 degree step hole hard alloy forming milling cutter - Google Patents

Abstract

A 90° stepped hole cemented carbide forming milling cutter, including a cutter body, a carbide cutter head, and a Morse shank at the tail of the cutter body. At right angles to its outer circular edge, the rear of the cutter head is radially inlaid with two face teeth, and the distance from the end face edge of the helical tooth to the end face edge of the end face tooth is equal to the depth of the pipe hole to be processed; the front part of the cutter head is also inlaid with a chamfer The axial length of the chamfered teeth is greater than the axial length of the helical teeth; the direction of rotation of the helical teeth and the chamfered teeth is left-handed. This 90° stepped hole carbide forming milling cutter has reasonable design, high tool positioning accuracy, fast and convenient loading and unloading, time-saving and labor-saving, good wear resistance and long service life. Processing and forming, high production efficiency. The chamfering teeth are used to remove the burrs formed by the extrusion of the chips caused by the cutting of the zirconium liner by the helical teeth, so as to prevent the chips from blocking the inner hole of the pipe. The left-handed helical groove is to make the chips discharge to the inner hole of the unprocessed pipe and protect the surface roughness of the inner hole of the processed pipe.

Description

90° stepped hole carbide form milling cutter

technical field

The utility model relates to a milling cutter, in particular to a cemented carbide inlay forming milling cutter for processing 90° stepped holes.

Background technique

At present, in the manufacture of urea equipment in China, high-speed steel end mills or single-toothed carbide milling cutters are generally used to process the zirconium bimetallic stripping tube head welded with the tube plate. The disadvantage is that the inner diameter and depth of the tube hole are not easy to control. , The 90° step hole does not meet the technical requirements.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies in the prior art, and provide a kind of hard alloy forming milling cutter which processes and forms the tube hole inner diameter, depth and 90° step hole at one time. This 90° stepped hole hard alloy forming milling cutter includes a cutter body, a carbide cutter head, and a Morse shank at the tail of the cutter body. The round edge is at right angles, the rear of the cutter head is radially inlaid with end face teeth, and the distance from the end face edge of the helical teeth to the end face edge of the end face teeth is equal to the depth of the pipe hole to be processed; the front part of the cutter head is also inlaid with chamfering teeth, and the chamfering teeth are axially The length is greater than the axial length of the helical teeth; the direction of rotation of the helical teeth and chamfered teeth is left-handed. This 90° stepped hole carbide forming milling cutter has reasonable design, high tool positioning accuracy, fast and convenient loading and unloading, time-saving and labor-saving, good wear resistance and long service life. Processing and forming, high production efficiency.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic diagram of the structure of the cutter head of the utility model.

Fig. 3 is a B-B sectional view of Fig. 1 .

Figure 4 shows the processed pipe fittings.

Detailed ways

The utility model is further described in conjunction with the accompanying drawings. This 90° stepped hole cemented carbide forming milling cutter includes a cutter body and a carbide cutter head. The tail 1 of the cutter body is a Morse tail handle, which is the positioning reference of the cutter , connected with the surface of the main shaft hole of the power head, the main shaft of the power head drives the milling cutter to rotate and mill the pipe hole in the axial direction, and the front part of the cutter head is inlaid with 3 helical teeth 2 (one helical tooth is not shown in the figure), The end edge of the helical tooth is at right angles to its outer circular edge, and two end teeth 3 are embedded radially at the rear of the cutter head. The distance from the end edge of the helical tooth to the end edge of the end tooth is equal to the depth of the pipe hole to be processed; One chamfering tooth 4 is inlaid, and the axial length of the chamfering tooth is greater than the axial length of the helical tooth; the helical tooth and the chamfering tooth are left-handed. This kind of 90° stepped hole carbide forming milling cutter, the helical tooth end face edge completes the processing of the inner hole and the 90° step hole, the outer circular edge is used for positioning and inner hole smoothing, and the end face edge of the end face tooth is used for processing the end face of the pipe. The distance from the end face edge of the helical tooth to the end face edge of the end face tooth is then equal to the depth of the processed pipe hole, and the pipe hole inner diameter, depth, and 90° step hole are processed and formed at one time. The chamfering teeth are used to remove the burrs formed by the extrusion of the chips caused by the cutting of the zirconium liner by the helical teeth, so as to prevent the chips from blocking the inner hole of the pipe. The left-handed helical groove is to make the chips discharge to the inner hole of the unprocessed pipe and protect the surface roughness of the inner hole of the processed pipe. There can be one or more helical teeth or chamfering teeth, but 3 helical teeth and 1 chamfering tooth are evenly distributed on the cutter head at 90°, which not only ensures enough space for chips, but also facilitates the measurement of the outer diameter and Tolerance, more importantly, is conducive to tool centering and guidance, to avoid unbalanced cutting force that makes the roundness of the inner diameter of the tube hole out of tolerance.

Claims (2)

1. A 90° stepped hole cemented carbide forming milling cutter, including a cutter body, a carbide cutter head, and a Morse tail handle at the tail of the cutter body, which is characterized in that the front part of the cutter head is inlaid with helical teeth, and the end face edge At right angles to its outer circular edge, the rear of the cutter head is radially embedded with end face teeth, and the distance from the end face edge of the helical tooth to the end face edge of the end face tooth is equal to the depth of the pipe hole to be processed. 2. The 90° stepped hole cemented carbide forming milling cutter according to claim 1, characterized in that the front part of the cutter head is also inlaid with chamfered teeth, and the axial length of the chamfered teeth is greater than the axial length of the helical teeth. 2. The 90° stepped hole cemented carbide forming milling cutter according to claim 1 or 2, characterized in that the helical teeth and chamfered teeth are left-handed.

Images