Electrohydropulse fastening sleeve in the housing bore cabinet parts

 

(57) Abstract:

Usage: pressure treatment of materials using the energy generated by electrical explosion of wire. The essence of the invention: hollow sleeve having a bottom, place the exploding conductor connected with electrical contact to the center of the bottom part of the sleeve. The cavity of the sleeve to fill the working transmitting medium, after which the sleeve is installed with a clearance in the hole of the Cabinet parts. Produce electric explosion of a conductor and the resultant energy to carry out the deformation of the sleeve in the radial direction. Previously on top mating surface of the bushing and/or carcass parts are threaded. On the bottom mating surface of the bushing to form the slots. After deformation of the sleeve by drilling to remove its bottom part. 1 Il.

The invention relates to a pressure treatment of materials by using electric energy of the explosion of the conductor and relates, in particular, pressing the steel bushings in the housing bore cylinder engines, made of aluminum alloy.

There are many methods supress These methods have limited technological capabilities, require high energy costs and processing time, are of great intensity, and in addition, the application of these methods represents a challenge to the implementation of the pressing sleeve in a blind hole of Cabinet parts.

Wide application in science and technology are finding ways deformation of metals using energy explosives [2] the Main disadvantages of this method are the increased safety requirements, limited technological capabilities, as well as the impossibility of carrying out deformation of the pipes and sleeves with small diameters.

There is a method of connection of the sleeve with a body part [3] consists in the preliminary Assembly of the sleeve with a body part, the locking sleeve pin relative to the part and the deformation of the sleeve forming the tap. In addition, prior to Assembly and deformation on the mating surfaces of the parts and the bushing is formed with a thread. This method has great energy, limited technological capabilities, long processing time, the problematic implementation of the deformation of high-strength and hard metals.

The closest in technical essence avlaia in the cavity of the sleeve, with the bottom of the exploding conductor is connected by means of an electrical contact to the center of the bottom part of the sleeve, filling the cavity of the sleeve of the working transmission environment, the installation of the sleeve with a gap in the hole of Cabinet parts and the subsequent deformation of the sleeve in the radial direction of the energy generated by electrical explosion of the conductor [4]

Specified known method does not provide a sufficiently reliable connection of the sleeve with a body part.

The objective of the invention is to provide a method by which you can obtain quality and reliable connection of the sleeve with a body part having different sizes and made from different materials.

To solve the problem in known electrohydropulse method of fastening the sleeve in the housing bore housing details, including accommodation in the cavity of the sleeve with the bottom of the breaking of the conductor is connected by means of an electrical contact to the center of the bottom part of the sleeve, filling the cavity of the sleeve of the working transmission environment, the installation of the sleeve with a gap in the hole of Cabinet parts and the subsequent deformation of the sleeve in the radial direction of energy, trouble and/or carcass parts are threaded, on the bottom of the mating surfaces form the slots, and after the deformation of the sleeve is removed by drilling its bottom part.

The drawing shows the circuit implementation electrohydropulse method of mounting the sleeve in the housing bore of Cabinet parts. The method is as follows.

In the cavity injected sleeve 1 made by carving and slots respectively on the upper and lower parts of the mating surfaces have an exploding wire 2 length slightly greater than the height of the sleeve. The wire 2 or soldered to the bottom side through the corresponding hole, or welded by resistance welding. In the hole of Cabinet parts 3 threaded or without placing the sleeve from the exploding wire. In the cavity of the sleeve fill the working medium 4, such as water, paraffin. Install the gasket 5 in the form of a washer of a dielectric material with a diameter approximately equal to the diameter of the exploding wire. The other end of the wire is mechanically connect the electrical contact with the electrode 6. The electrode 6 and the housing part 3 is attached to the current-carrying cables of the pulse current generator 7. When applying a high voltage h is around her in an environment formed by the shock wave. Spreading in transmitting the working environment 4 radial wave compression high pressure cylindrical uniformly deforms the sleeve 1 and thus makes its insertion into the hole of Cabinet parts. The presence axiales component of the pressure shock wave affects the bottom part of the sleeve 1, which allows to avoid axial displacement of the sleeve 1 along the axis of the hole in the explosion of the conductor. The presence of the bottom part of the sleeve does not allow, as it would be in the case of a standard cartridge and sleeve without the bottom part, the reflected wave from the bottom of the hole parts to have an impact on the end face of the sleeve and to produce displacement of the latter along the axis of the hole. In addition, thanks to the sleeve, made in the form of glass, is precisely aligned with the sleeve 1 the location of the exploding wire 2, which provides a homogeneous deformation of the sleeve. Running on the mating surfaces of the sleeve 1 and/or carcass part 3 of the thread, and on the mating surface of the bushing slots increases the quality of the crimp. Apply pipe thread avoids the possibility of microcracks in the Cabinet parts. The presence of slots of different types in the lower part of the mating surfaces of the sleeve not allow the us to avoid prizhogi on the surface of the carcass part, especially in the case of small diameters of the sleeve, thereby provides a full explosion of a wire 2. If necessary deformation of thick-walled sleeves in order to avoid losses it makes sense to consolidate the dielectric strip for Cabinet parts.

Example. The experiments were conducted at the pilot installation comprising an explosion chamber, in which is placed a solid dielectric base with metal structure, engaged in mount Cabinet parts, electrodes and current-carrying cables. Applies a pulse current generator brand GIT 10-20/400-A4 with stored energies up to 36 kJ. Steel sleeve with an outer diameter of d112 mm, an inner diameter of d26.5 mm, the length l of 16 mm, a thickness of the bottom part h 1,0 2 mm was zapressovyvat in a blind hole of Cabinet parts from aluminum alloy with a diameter of d312.5 mm 2 / 3rds of the length of the sleeve and the hole part is cut metric thread M 12. 1/3 lower part of the sleeve length with a diameter of d110,7 mm were formed along the axis of the sleeve triangular slots. The size of the exploding wire was varied in the range lCR20 to 40 mm and dCR0,5 0,8 mm Thickness of the dielectric spacers were used depending on the magnitude of Provalov obtained based on the quality of the shot from the installation parameters and physical properties of deformable materials, as well as prototypes of crimp sleeve in a blind hole of Cabinet parts.

Electrohydropulse fastening sleeve in the housing bore of Cabinet parts, including placement in a cavity of a sleeve having a bottom, exploding conductor connected with electrical contact to the center of the bottom part of the sleeve, filling the cavity of the sleeve of the working transmission environment, the installation of the sleeve with a gap in the hole of Cabinet parts and the subsequent deformation of the sleeve in the radial direction of the energy generated by electrical explosion of the conductor, wherein the pre on top of the mating surfaces of the sleeve and/or carcass parts are threaded on the lower mating surface of the bushing to form slots, and after deformation of the sleeve is removed by drilling its bottom part.

 

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