SU779048A1 - Burnishing apparatus - Google Patents

Description

one

The invention relates to mechanical engineering technology for machining parts by plastic deforming the surface layer of parts by a percussion method and can be applied to strengthening cylindrical, flat and shaped surfaces, as well as internal surfaces of large diameter.

A device for hardening parts is known, comprising a rotary motion drive, fixed guides, radially made, a driving sprocket and peen, which, when rotated along the guides under the action of centrifugal force, flow. ds, and when meeting with the surface of the hardened part, the work hardening is performed

ha

The disadvantages of the known device are the complexity of the design and the need to drive the rotational motion.

It is also known a device, the hammer in which makes a reciprocating movement due to the presence of a drive made in the form of an electromagnet, and returnable elements, such as springs, returning the hammer to its original position in the absence of

current in the coil of the exciter, the cd of the electromagnet C2.

The disadvantages of this device are the low efficiency of the device.

5 in connection with the opening of the magnetic circuit of the electromagnet, as well as the large heating of the device during long-term operation due to the fact that during the period the current changes direction twice - loss

10 per hysteresis.

The purpose of the invention is to increase the productivity of the hardening process.

This goal is achieved by the fact that it is equipped with

5 drive a curved direction to the shaft, on the upper surface of which a groove is made, to reflectors placed at the ends of the guide and mounted with the possibility of returning 20 but translational movement.

Figure 1 schematically shows a device for strengthening parts, a general view; Fig. 2 shows the upper part of the guide, view A.

25 A device for hardening parts contains a fixed magnetic core 1, assembled from insulated from each other W - shaped plates of transformer steel, on the side

Claims (2)

30 rods of which are mounted on coil 2, with semiconductor diodes 3 and 4 connected in series. Between the upper ends of the fixed magnetic circuit 1, a guide 5 is fixed, bent along the radius, on the upper surface of which a through groove is made, which is smaller than the diameter striker - ball 6 placed inside the guide. At the ends of the guides 5, there are installed dampers containing a reflector 7, a compression shaft 8 and a screw plug 9. The damper on the side of the reflector 7 is rolled to prevent it from falling out during operation, and on the other side of the damper, internal thread is cut. adjusting the initial compression of the spring. 8 for introducing the entire system into the self-oscillation mode. When the excitation coils 2 are connected to the AC network, a voltage, such as a positive field, is fed into the right half of the electromagnetic system formed by the central and side rods and a booster connected in series with the diode 4 and energizes the magnetic field between the ends of said rods which striker 6 strives, reducing the air gap and converting electromagnetic energy into mechanical work, moving toward the reflector 7 with acceleration. When striking the reflector 7, the striker b causes it to sink into the building ce damper compressing the spring 8, thereby converting the Ener Gia Damages in the potential energy of the compression spring. When the voltage in the coil 2 decreases, the spring 8, returning to its original position, starts pushing the striker 6 towards the left side core of the magnetic circuit, which is also promoted by the reversal of the polarity of the voltage and turn-on, respectively, of the coil 2 on this rod through diode 3, negative current throughput. The head 6 on the guide 5 will start moving to the left with acceleration, but since the guide 5 is made along the radius, the resulting centrifugal force presses the head to the top of the guide. The entrance to the through groove on the upper part of the guide, the firing pin 6 goes outside and, upon meeting with the surface of the workpiece, applies a blow on it. Then, under the action of the return shock pulse, it bounces into the gap towards the lower part of the guide and moves towards the reflector 7 of the damper. The process then repeats. Thus, the excitation coils 2, alternately connected through diodes 3 and 4, excite the magnetic field between the central rod and the side rods, while the striker b closes the magnetic circuit between them and at high speed performs reciprocating movements between the reflectors of the damper and produces a number of beats equal to twice the power frequency. The power supply voltage and the spring stiffness of the spring can be varied by adjusting the screw plug 9 to a wide range to adjust the intensity of the impact of the hammer and introduce the system into the self-oscillating mode, thereby increasing the efficiency of the device. . Claims for hardening of parts, comprising a drummer installed between poles of an electromagnetic AC drive with the possibility of reciprocating movement, characterized in that, in order to increase productivity, it is provided with a curved guide located on the drive, on the upper surface of which a groove is made, and reflectors located at the ends of the guide and mounted with the possibility of reciprocating movement. Sources of information taken into account in the examination 1. USSR author's certificate number 576203, KL..V 24V 39/00, 1976. 2. Authors certificate of the USSR 446403, cl. B 24 B 39/02, 1972.