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INVENTION
Patent of the Russian Federation RU2177870
DEVICE FOR PROCESSING THE SURFACE OF THE SPHERICAL FORM
Applicant's name: Kaliningrad State Technical University (RU)
The name of the inventor: Tilipalov V.N. (RU); Minakov Anatoly Petrovich (BY); Akimov S.S. (RU)
The name of the patent holder: Kaliningrad State Technical University (RU)
Address for correspondence:
Date of commencement of the patent: 2000.01.12
The invention relates to the surface treatment of spherical articles and can be used in the processing of beads made of various materials, for example, metal, glass, plastic, amber, etc. The device comprises a pair of working tools in the form of discs with annular projections along the periphery and a cylinder Located between the discs to form a chamber. In the lateral surface of the latter, channels are provided for feeding the working medium tangentially directed to the working surfaces of the tools. The inner surfaces of the tool ring protrusions are spherical, the abutting is applied to the annular projections, alternating between the sections with the coarse and fine fractions of the abrasive. The disks are installed from the condition of the location of the sections of the annular projections with a fine fraction of the abrasive of one disc opposite to the sections with a coarse fraction of the abrasive of the other. The use of the device leads to an improvement in the quality of the processing due to the provision of a guaranteed multi-axis rotation and the expansion of the functionality of the device.
DESCRIPTION OF THE INVENTION
The present invention relates to the field of surface treatment of spherical articles and can be used in those industries where appropriate product processing is carried out.
The proposed invention can be used in the processing of balls of metal, glass, plastics, amber, etc.
A device for processing balls is described in US Pat. No. 2,734,317, NCI 51-73, published in 1953. This device comprises a pair of working tools made in the form of disks that are mounted rotatably about axes.
In the cavity between the discs, the balls to be treated are placed and acted upon by them under pressure, directed tangentially to the surfaces of the working tools.
The main disadvantages of this device include the low quality of the treated surface, since the latter do not have guaranteed multi-basic rotation.
The closest to the technical essence and the achieved result is a device for processing balls, intended for the implementation of the method according to the author's certificate 656811, M. Kl. In 24 V 1/02, the claimed. 20.09.76, publ. 15.04.79.
The known device comprises a pair of working tools made in the form of coaxially mounted disks.
One of the disks is mounted motionless, and the second one is mounted rotatably.
Both discs on the periphery are provided with annular projections circumscribing the space between the discs in which the cylinder is located. This cylinder forms a closed chamber for supplying a working medium under pressure for processing balls. In the lateral surface of this chamber tangentially directed nozzles are made.
The main disadvantage of this method is the low quality of ball processing and its limited functionality, since it is provided for the processing of products made of only one material (metal).
The task, the solution of which is directed to the invention, is to improve the quality of processing by making the workpiece even more guaranteed multi-axis rotation and expanding the functionality of the device by processing products made of various materials, for example, glass, plastic, amber, etc.
The technical result is achieved due to the fact that in the device for processing balls comprising a pair of working tools made in the form of disks equipped peripherally with annular projections and a cylinder arranged between the discs forming a chamber with channels in the side surface for supplying the working medium, annular projections Both discs have an abrasive coating for removal from the stock allowance. The abrasive coating is applied by alternating areas with coarse and fine abrasive fractions, respectively. The disks are installed so that the areas of the annular projections with a fine fraction of one disc are located opposite to the areas with a coarse fraction of the abrasive on another disk.
This is necessary to give the workpiece a multi-axis rotation. In this case, the axes of the channels for supplying the working medium are arranged in such a way that they provide a tangential direction of the working medium relative to the surfaces of the working tools, this ensures a more intensive rotation of the axis of rotation of the workpiece. The inner surfaces of the annular projections are spherical in shape to improve the quality of the products produced. The upper and lower discs may be arranged with an eccentricity for an even better rotation of the axis of rotation of the workpiece.
The essence of the invention is explained by the drawing, which schematically shows the proposed device.
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In Fig. 1 shows a longitudinal section of the device, FIG. 2 is a sectional view of AA in FIG. 1.
The device comprises a pair of working tools 1 and 2, made in the form of disks with annular projections 3 and 4 on the periphery. The latter limit the cavity 5 formed by the discs 1 and 2. In this cavity, on one of the discs, for example, on the fixed disc 2, a cylinder 6 is formed, forming a chamber 7, which serves to supply the working medium under pressure. In the lateral surface of the cylinder 6, channels 8 are provided for supplying the working medium with pressure, the axes of which are arranged so as to provide a tangential direction of the working medium relative to the surfaces of the working tools.
The annular projections 3 and 4 have an abrasive coating, and the areas with the coarse abrasive alternate with the areas with the fine fraction abrasive. The chamber 7 is connected to the compressor 9 by means of a pressure regulator 10 and a throttle 11.
The device for processing balls works as follows
The workpieces to be processed are disposed in the cavity 5, for which purpose the disk 1 is lifted, for example, by means of a screw pair. Returning the disk 1 to the initial position, ensure the presence of a gap between the projections 3 and 4, the value of which is determined experimentally and depends on the amount of pressure acting on the balls of the medium and the diameter of the treated balls. Subsequently, a medium is introduced into the cavity 5 under pressure, which may be liquid or gaseous. The pressure value is chosen depending on the diameter of the treated balls. Simultaneously with the working medium, a dosed amount of a paste or other abrasive can be fed into the chamber 7.
Under the influence of the working medium, the workpiece is rotated around the axis of the working tools 1 and 2, moving along the surfaces of the projections coated with abrasive material. The pressure of the working medium acting on the balls changes during one revolution around the axis of the working tools from the minimum to the maximum value according to the sinusoidal law. The change in pressure is effected by a mechanically actuated throttle 11, adjusted so that the pressure change period corresponds to the time the center of the ball reaches the full revolution around the axis of the disc. The pressure level is maintained by the pressure regulator 10, the exit of the waste medium occurs through the gap between the protrusions 3 and 4 of the working tools.
The change in the pressure of the medium acting on the spheres causes a change in the pressing force of the balls to the abrasive surfaces along which the balls move, since the clamping force in these processing conditions arises from the centrifugal forces determined ultimately by the pressure of the medium acting on the spheres. The periodic change in the clamping force in the conditions of one-way power communication, which occurs when the balls are rotated around the axis of the working tools, provides the possibility of reorienting the balls relative to these working surfaces. This occurs under the influence of the medium directed under pressure tangentially to the surfaces of the working tools.
Thus, in the processing of balls with a report of rotation, periodic changes in the pressure of the medium acting on the balls according to the sinusoidal law, eccentric tools installed with tools 1 and 2, abrasive material of various fractions applied to the working tool sectors, different directions of the channel axes in different sectors of workers Tools, possible rotation of the lower working tool ensure a guaranteed multi-axis rotation of the balls, as a result of which the quality of the treated surface of the balls increases.
CLAIM
A device for processing balls comprising a pair of working tools in the form of discs with annular projections along the periphery and a cylinder disposed between the discs to form a chamber in the side surface of which channels are provided for feeding a tangential medium directed tangentially to the working surfaces of the tools, characterized in that The internal surfaces of the tool's ring protrusions are spherical, the abrasive coating is applied to the annular projections, alternating between the large and fine fractions of the abrasive, and the disks are arranged from the location of the annular shoulder portions with a fine fraction of the abrasive of one disc opposite the portions with a coarse fraction of the abrasive of the other.
print version
Date of publication 02.01.2007гг
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