SU654340A1 - Method of manufacturing cutting bits of tools - Google Patents

Description

one

The invention relates to the processing of metals by pressure, in particular to methods for the production of metal-cutting tools.

A known method of manufacturing cutting elements of tools, including the operations of forming cutting elements, heat treatment and subsequent machining 1.

The disadvantage of this method is the high labor intensity and the ability to manufacture such cutters in the range of only small modules 1.5-4 mm.

In addition, carbide cutting elements may not be used everywhere under the conditions of use.

The aim of the invention is to reduce labor intensity and save material.

For this, according to the proposed method, a pipe is used as the initial billet, and the cutting elements are molded by longitudinal rolling of the original pipe to obtain the irofil, a short final cutting element, after which the resulting multiple profile is cut into individual elements at an angle to the longitudinal axis.

FIG. 1 shows the initial billet-pipe of tool steel, end view; in fig. 2 - cutting element

a worm milling cutter, for milling cutters of small modulus mm; in fig. 3 - cutting elements device, for milling cutters of the middle module (the arrow shows the permanent joint); in fig. 4 - arrangement of cutting elements for cutters of large modulus mm; in fig. 5 - cutter element before assembly; in fig. 6 - heated tubular billet, pre-rolling; in fig. 7 - the same, rolling the faces of the workpiece with the introduction of the mandrel; in fig. 8 - the same, final rolling; in fig. 9 — profiled workpiece, cutting locations and directions;

The cutting tooth of the slat in FIG. 4 is highlighted in bold lines; it consists of two parts of quince, each half of the tooth is profiled from separate tubes.

FIG. 5 shows the front face A, the side face B, the apex of the back face c and the bearing surface D of the milling cutter.

FIG. 6 shows the pre-rolling of the heated billet 1 of tool steel in the rolls 2.

FIG. Figure 7 shows the rolling of the faces of the workpiece 1 with the mandrel 3 inserted in the carrier and replacing the upper roll with another roll 4. The arrows indicate the reduction forces and rotation of the rolls.

Upon further rolling (see Fig. 8), the upper roll is replaced by roll 5.

The process is carried out as follows.

A pipe made of tool steel of the required diameter and with a calculated wall thickness is cut into dimensional workpieces, polished using an outer diameter, the pipe is heated to more than 1000 ° C, and the cutting elements are made by longitudinal rolling as shown in FIG. 6, 7, and 8c, by simultaneously forming the surfaces of the teeth and valleys on the pipe, heat-treating the workpiece according to the modes of tool steels, then produce the final polishing of the teeth and hollows along the profile and specified sizes.

The operation of cutting the finished pipe into one-dimensional individual cutting elements is performed as follows.

The workpiece is set at an angle a to the trajectory of the forward movement of the cutting abrasive wheel (see Fig. 3) and cut (a is the value of the back angle of the side and the top edges of the rel: bite element). Further processing is performed using standard technology, polished front faces and reference planes L and D, demagnetized, washed, chemically treated, labeled, etc.

After the final production of the cutting elements, they are fixed in the working case of the cutter and are finally profiled on the thread grinder with simultaneous backing of the back faces B "C. The cutting elements in the cutter body are ready for operation. The fastening of the cutting elements can be done by any means.

An example of a specific embodiment of the cutting element of a worm cutter module / n 10 mm.

1. Select a pipe of 40 mm from steel R6M5 with a length of 40 mm.

2. Twist from both ends, remove the inner chamfer 1,5x-45.

4. Heat the billet to g 1000 ° C.

5. Rolled lateral surfaces of the tooth troughs with profiled rollers, leaving the opening on the side of 1 mm for further processing.

6.Production of billet heat treatment

quenched to HR with: 62-64.

7. Abrasive circles are polished on the lateral and apical surfaces of the teeth, leaving an allowance of 0.3-0.5 mm for final processing.

8. Cut the workpiece and individual cutting elements at an angle of a-5-10 ° (angles are selected depending on the processing conditions).

9. Install cutting elements on the surface grinder plate and grind the front and back surfaces L and D.

10. The recessing elements are fixed in the working housing.

11. Handle the hull seats.

12.Polish cutting elements in outer diameter.

13. Grind on the profile of the teeth and pits on the thread grinding machine.

14. Perform backing.

15. After sharpening, demagnetize and perform other known operations, the cutter is ready for operation.

Using the method of manufacturing cutting elements of tools, for example, for a worm milling cutter, in comparison with the methods existing in industry, simplifies the manufacturing technology of cutting elements of tools, reduces the consumption of tool steel by 2 and 2.5 times, and increases productivity 1.5-2 times. and decrease in labor input by 30-50%.

Worn cutting elements — the teeth can be rotated to introduce new cutting edges (see FIG. 2) and also be moved from areas of intense wear to areas of less intensive wear and vice versa.

Claims (1)

Invention Formula A method of manufacturing cutting elements of tools, including the operations of forming cutting elements, heat treatment and subsequent machining, in order to reduce labor intensity and material savings, use pipe cutting elements are carried out by longitudinal rolling of the original pipe to obtain a profile that is short of the final cutting element, after which the resulting multiple profile is cut into individual elements at an angle to the longitudinal axis. Sources of information taken into account in the examination 1. O. Moiseenko. New designs and technologies for the manufacture of carbide worm gear cutting mills. Kiev. 1968. Fig srig.Z FIG. 2 Vuz.if rig.5 e (city  V  R 22 g 1rig.7