RU2003457C1 - Tool for finishing-strengthening treatment - Google Patents

Description

rotor rotation) is made in the form of an ellipse (see Fig. 2), in the second from the edge of the annular chamber (annular chamber 10), the cross-sectional profile of the rotor is a triangle (see Fig. 3), and in subsequent annular chambers (annular chambers 11,12.13) the cross section of the rotor has the shape of a polygon with a sequential increase in the number of angles, i.e. four-, n-, and hexagon, respectively.

Part 21 is installed in the chuck, and the tool in the spindle 22 of the machine. The plane of arrangement of the deforming elements 16 of the annular chamber 9 of the tool is aligned with the end of the part 21, the tool is installed coaxially with the axis of rotation of the part. The spindle is informed of rotation and the tool is moved along the generatrix of the machined surface. The deforming elements 16-20 under the influence of a magnetic field are accelerated in the circumferential direction of the annular chambers, interact with the surface being treated and dynamically harden it.

Since the cross-sectional profile of the rotor 1 of the annular chamber 9 is made in the form of an ellipse, the deforming elements 16 receive an increase in energy (magnetic energy, since the magnets 14 and 15 are closed to the magnetic part of the rotor and the magnetic part of the rotor actually becomes a magnetic circuit and leads into each of the annular chambers 9-13 magnetic flux) when they are located opposite the vertices of the ellipse (see Fig. 2), and only two times per revolution of the tool. In this case, the magnetic flux passing through the magnetic part 1 of the rotor from the magnets 14, 15 is distributed into two parts. Therefore, the force of the magnetic field on the deforming elements 16 is large and therefore, the force of the dynamic action of the deforming elements 16 on the workpiece surface 21 is great.

The deforming elements 17 receive an increment of magnetic energy three times per revolution of the part (the cross-sectional profile of the rotor is a triangle). Since the magnetic flux (see Fig. 3) passing through the magnetic part 1 of the rotor is broken up into sodium parts, the magnetic force on the deforming elements is somewhat reduced, which reduces the dynamic force of the deforming elements 17 on the surface to be treated. The deforming elements 18 of the annular chamber 11 receive an increment of magnetic energy four times per revolution of the tool. At

In this case, the magnetic flux (see Fig. 4) is divided into four parts, which reduces the dynamic force of the deforming elements 18 on the surface to be treated.

Thus, during operation, the deforming elements 16 located in the annular chamber 9 deform the surface with a maximum dynamic force and a minimum frequency. Subsequent deforming elements gradually reduce the deformation force, but at the same time increase the frequency of dynamic impact on the workpiece

5 the surface of the part 21. This allows you to combine in one technological transition draft (carried out with high dynamic force and low frequency of exposure) and finish (carried out with small

0 dynamic force, but with a high frequency of action) deformation of the surface of the layer of the part, which increases the productivity of processing.

In this case, the deforming elements in

5 different annular chambers (since they obtain from the side of the magnetic part of the rotor for the rotation of the tool a different number of times the increment of magnetic energy) carry out oscillatory movements with different frequencies. The phase of action of the deforming elements of the various annular chambers is also different. This eliminates the phenomenon of resonance (when the amplitude of low-frequency oscillations of the tool and part sharply increases). There are no signs of vibration on the surface to be treated. The quality characteristics of the treated surface are improved.

An example of a specific embodiment is the machining of a bore of a sleeve of steel 3 on a 16K20FZ machine.

Diameter of processing 120mm; processing length 200 mm; sleeve wall thickness 2.5 mm.

5–6 balls with a diameter of 12 mm were used as deforming elements (ШХ 15, ШРСэ 62). The dimensions of permanent ring magnets with axial magnetization D x d x h 90 x 10 x 40 mm. Magnet Material

0 SmCos. The cross-sectional profile of the magnetic part of the rotor in the first annular chamber from the edge is an ellipse with axes 90x30 mm; the second is a triangle with equal sides 75 mm long; the third is a quadrangle

5 (square) with a side length of 60 mm; the fourth - p triangle with a side size of 50 mm; the fifth is a hexagon with a side length of 45 mm.

Processing modes: tool rotation speed 2-5 m / s; axial feed of the tool 600 mm / min; Cooling - industrial oil.

Depth of hardening of the surface layer of the part: 0.40 mm; surface roughness Ra - 0.63-0.32 microns; the degree of deformation of the metal is 30%.

When processing a prototype tool, the machine time was 8.24 min, when processing the proposed tool

TOOL FOR FINISHING AND FASTENING PROCESSING, comprising a rotor having radial chambers sequentially located along its axis, open in the direction from the axis of the rotor to the periphery, deforming elements installed in the chambers with the possibility of spatial oscillatory movements, a magnetic field source for acceleration of deforming elements, characterized in that, in order to increase productivity and quality of processing, respectively, by combining in time the rough and finish odov deforming vibrations and eliminate traces on the treated surface, it is provided with a rotor mounted on to the fact - 0.4 min. There were no traces of vibrations on the treated surface during processing by the proposed tool.

The proposed tool allows

to increase the processing productivity by 20.6 times and the qualitative characteristics of the treated surface. (56) 1. USSR Copyright Certificate Ns 906679, cl. 24 V 39/02. 1982.

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a complementary source of magnetic field, the rotor is made of a series of sequentially coaxially arranged

5 magnetic and non-magnetic parts, the chambers are made circular, the magnetic field sources are installed at the opposite ends of the magnetic part of the rotor, made in the form of ring magnets with

0 axial magnetization and opposite each other with opposite poles, and the rotor is made variable in cross section from one chamber to another, while the cross section of the rotor in the first chamber,

25 located at the end of the rotor, opposite its non-magnetic part, has the shape of an ellipse, in the second - a triangle, and in subsequent chambers - the cross section has the shape of a polygon with a successive increase in the number of angles.

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