RU1777193C - Device for manufacture of reflector of aerial - Google Patents

Abstract

Usage: for the manufacture of high-precision mirror antennas of the millimeter wavelength range. SUMMARY OF THE INVENTION: the device consists of a faceplate 1 provided with a rotation mechanism, a mandrel 3, a clamp 4 for securing the workpiece 5 along the axis. The invention relates to antenna technology and can be used. for the manufacture of millimeter-wave high-precision mirrored antennas. A known device for the manufacture of spherical reflectors, containing a table with a drive, fastening elements of the workpiece and tool. The known device allows to obtain a groove of a large mandrel 3, a roller press 6. A roller press 6 with a radial edge 7 is installed in the support 8 at an angle to the axis of rotation of the faceplate 1 On the radial edge 7, several grooves are made in / diametrical sections. The movement of the roller presser 6 in the process of rolling out the antenna is carried out along a curve that is equidistant to the profile curve of the mandrel 3. Monitoring and control of the feed are carried out by the linear displacement sensor 12, which with its spherical tip 13 slides along the working edge 11 of the convex template 10. The radius of the sphere of the spherical tip 13 is chosen equal to the radius of the working edge 7. When changing the roller press 6, the tip 13 is changed depending on the radius of the working edge 11 with the template 10 unchanged. Setting the axis of the roller pressure Slider 6 at an angle to the axis of rotation of the faceplate 1 allows its generatrix to be used for flanging the antenna. 3 sludge blanks accurate spherical mirror. The device in question has low productivity, high metal consumption, and considerable manufacturing cost lj. A more progressive method and device for manufacturing antennas is also known in the art, devoid of these drawbacks and allowing the manufacture of axisymmetric antennas with any profile of the body of revolution (sf (L C x | vi XI 10

Description

ric, hyperbolic, etc.) and with high accuracy. A known antenna manufacturing device adopted for the prototype is described in 2. It consists of a base, a faceplate provided with a rotation mechanism, a mandrel made in the form of an axisymmetric surface of a given profile and mounted coaxially on the faceplate. The DEVICE includes a roller press, which in the process of rolling out the workpiece moves along the forming mandrel. The movement of the roller press is carried out according to a curved template, rigidly fixed to the base, by means of a drive and a feedback system. A roller press with a radial working edge deforms the workpiece (for example, a sheet of soft aluminum), laying it on a mandrel, and gives it a given shape.

A disadvantage of the known device is the very high requirements for uniformity in the thickness of the sheets of the sharpening and alignment of the mandrel with the axis of rotation of the faceplate and the need to produce a special concave template. Failure to comply with these requirements leads to uneven deformation of the metal of the workpiece, the formation of bubbles, delamination from the mandrel and loss of accuracy.

The purpose of the invention is to increase the accuracy of manufacturing the antenna and simplify the technology.

This goal is achieved by the fact that in the device for manufacturing an antenna consisting of a base, a plan

Q g o

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5

longitudinal movement of the caliper with a roller press.

The tip of the DLP is made spherical with a radius of the sphere equal to the radius of the radius of the edge of the roller press. A roller press made in the form of a truncated cone with a radius edge located around the perimeter of the base is mounted in the support so that its axis is at an acute angle to the axis of the mandrel.

In addition, grooves are made on the radial edge of the roller press in its several diametrical sections, parallel to the axis of rotation of the roller press.

A comparative analysis of the inventive device with the prototype showed that its difference consists in making the DLP tip spherical with a given radius of the sphere, manufacturing the working edge of the template according to the convex curve at f (x2) - the forming mandrel, in installing the roller press in the support at an acute angle to the axis mandrels and in execution on the radial edge of the groove roller press.

These features distinguish the claimed device from the prototype and determine whether this solution meets the novelty criterion,

Comparison of the claimed device with other devices known in the art did not allow them to reveal features similar to those distinguishing the claimed device from the prototype, which allowed us to conclude that

a washer equipped with a rotation mechanism under the criterion of significant differences with the mandrel mounted coaxially with it,

Figure 1 shows a diagram of a device; figure 2 is a diagram of the position of the operating point of the roller press and the tip of the DLP on the working edge of the template in the manufacture of the antenna of Fig. 3 is a general view of the roller press.

made in the form of an axisymmetric convex body of revolution with a generatrix y f (x2), where x, y are the coordinates of the clamp generatrix to fix the antenna workpiece along the y axis of the mandrel, forming a roller press with a radial edge mounted in a support equipped with a transverse and longitudinal , relative to the axis of the faceplate, by movement mechanisms, a template fixed to the base, the working edge of which is made convex according to the formula for f (x2) and the following mechanism, including a linear displacement sensor (DLP), the tip of which is activates with the working edge of the template, an amplifier associated with the mechanisms of the transverse and

criterion for significant differences

5

0

5

Figure 1 shows a diagram of a device; figure 2 is a diagram of the position of the operating point of the roller press and the tip of the DLP on the working edge of the template in the manufacture of the antenna of Fig. 3 is a general view of the roller press.

The device for manufacturing the antenna consists of a base, faceplate 1, equipped with a rotation mechanism (not shown), on the faceplate 1 by means of a shell 2 and coaxially with it (axis y), a mandrel 3 is made, made in the form of an axisymmetric (relative to the axis y) convex body rotation

perbola, part of the circle) of the clamp V for securing the workpiece 5 of the antenna

with the generatrix of the corresponding curve for f (x2) (parabola, gy51

along the y axis, of a roller press b with a radius edge 7 installed in a support 8, equipped with transverse (parallel to the x axis) and longitudinal (parallel to the y axis) movement mechanisms (not shown), a guide roller 9t of the template 10, rigidly fixed to the base the working edge 11 which is made convex along the curve

f (xO,

where x is the coordinate along the axis perpendicular to the mandrel axis; y is the coordinate along the axis coinciding with the axis of the mandrel.

The device includes a follower mechanism, including a linear displacement sensor 12, the tip 13 of which is made spherical with a radius of the sphere equal to the radius of curvature of the radius edge 7t and which contacts the working edge 11 of template 10, an amplifier (not shown) connected with transverse and longitudinal movement of the caliper 8, the Roller press 6 is installed in the support 8 so that its axis is at an acute angle to the axis of the mandrel 3. On the radial edge 7 of the roller press 6 in its diametrical sections grooves And, numbered The grooves of these grooves And and their shape (depth, step width) are different and depend on the workpiece material Ј, on its plastic properties and thickness. In addition, the device includes clamping and flanging rollers 15 and 16.

The device operates as follows.

A workpiece 5 made of plastic material, for example, soft aluminum, is secured with a clamp 4

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twenty

the movement of the caliper 8, The movement along the x axis of the caliper 8 with the roller pressure 6 occurs synchronously with the movement of the tip 13 of the DLP 12 along the working edge 11 of the template 10, because The DLP 12 is rigidly connected to the caliper 8. The displacement of the DLP 12 along the x axis causes the tip 13 to deviate along the y axis in accordance with the profile of the working edge 11 of the template 10. The signal proportional to the deviation of the tip 13 is amplified and applied to the lateral movement mechanism (along the y axis) the caliper 8, ensuring the movement of the roller press 6 in accordance with a given profile of the working edge 11 of the template 10. The considered feedback can be carried out as without the participation of the operator, for example, on a machine with numerical control and with the operator who transversely feeds the caliper 8 and monitors it according to the indicator DLP 12. “

The material of the workpiece 5, falling into the gap between the rotating mandrel 3 and the radius edge 7 of the roller press b, is deformed and in a plastic state is rolled onto the surface of the mandrel 3, taking its shape. In order to obtain an accurate antenna, it is necessary that the volumes of the workpiece 5 under the roller press 6 before and after deformation are equal.

40 The volume of material deformed at this current time is determined by the contact spot area of the radius edge 7 of the roller press,

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which, in turn, is easy to make mandrels 3. A roller press 6, 45, from geometrical constructions fixed in a support 8, leads to hanging from R - radius of the roller press 6, d - radius of the radius edge 7 and the gap between the radius edge 7 and mandrel 3.

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In the case of a small gap (overload), the material of the workpiece 5 fills the volume under the roller press 6 and flows out from under it, both the gg molded part of the antenna and the material of the workpiece 5, which have accumulated over several turns of the mandrel 3, cause a bubble to form at the apex and significant stresses in

axis y for a given distance Umik which is determined from design considerations and the size of the clamp. The roller press 6 is brought to the workpiece 5 until its radius edge 7 is in contact with it, put in the initial position, the corresponding tip 13 of the DLP 12 relative to the working edge 11 of the template 10, rigidly fixed to the base, while the readings of the DLP 12 should correspond to a zero value , which indicates a gap between the radius

the edge 7 and the mandrel 3. equal to the thickness of the workpiece 5. Then turn on the rotation of the faceplate 1 and the mechanism of the transverse and longitudinal

0

5

0

the movement of the caliper 8, The movement along the x axis of the caliper 8 with the roller pressure 6 occurs synchronously with the movement of the tip 13 of the DLP 12 along the working edge 11 of the template 10, because The DLP 12 is rigidly connected to the caliper 8. The displacement of the DLP 12 along the x axis causes the tip 13 to deviate along the y axis in accordance with the profile of the working edge 11 of the template 10. The signal proportional to the deviation of the tip 13 is amplified and applied to the lateral movement mechanism (along the y axis) the caliper 8, ensuring the movement of the roller press 6 in accordance with a given profile of the working edge 11 of the template 10. The considered feedback can be carried out as without the participation of the operator, for example, on a machine with numerical control and with the operator who transversely feeds the caliper 8 and monitors it according to the indicator DLP 12. “

The material of the workpiece 5, falling into the gap between the rotating mandrel 3 and the radius edge 7 of the roller press b, is deformed and in a plastic state is rolled onto the surface 5 of the mandrel 3, taking its shape. In order to obtain an accurate antenna, it is necessary that the volumes of the workpiece 5 under the roller press 6 before and after deformation are equal.

0 The volume of material deformed at this current time is determined by the contact spot area of the radius edge 7 of the roller press,

0

rial, loss of profile accuracy and, as a result, marriage.

With a gap greater than $ (underpressure), the workpiece 5 does not fill the volume under the roller press 6 and does not take the shape of the surface of the mandrel 3, Therefore, the gap between the radius edge 7 and the mandrel 3 in the manufacturing process should be equal to equidistant, forming mandrel 3, offset by 8 along the y axis. However, when the roller press moves along the x axis, the point of contact of the radius edge 7 with the outer surface of the workpiece 5 depends on the angle oi (see Fig. 2). To ensure a given clearance, it is necessary to take into account this dependence, which in general terms is equal to:

- g g (

1

cosed

- D.

This correction can be entered in the profile.

 pressing 5 along the generatrix of the truncated nus of the presser 6 and by

the working edge 11 of the template 10, having made-g5 bortovogo roller 15 form

its liva according to the formula:

the outer rim of the antenna, so there is no need to use a pinch roller (see, which reduces the technological cycle and improves the accuracy of manufacturing tena. The angle of installation of the axis of the rollers of the presser 6 in the support 8 relative to the mandrel 3 is determined so that the base of the truncated cone touches the mandrel 3 and clamp 4 in the rolling process.The forming truncated cone of the roller press 6 determines the angle of inclination of the formed external rim of the antenna to the axis (to

y f (X2) Γ (

1

cos about

- 1),

where x is the coordinate along the axis perpendicular to the axis of the mandrel, y is the coordinate along the axis coinciding with the axis of the mandrel | g is the radius of curvature of the radial edge 7 of the roller press 6 in a diametrical section

About is the angle of inclination of the normal at the point of contact of the roller press 6 relative to the axis of the mandrel 3.

If the tip 13 of the DLP 12 is spherical with the radius of the sphere equal to r, and the working edge 11 of the template 10 is convex, no correction is necessary, since the contact point of the tip 13 and the working point of the roller press 6 are shifted equally. In this case, the change of the presser 6 is necessary when changing the material of the workpiece 9, with a different radius r of the radial edge 7 does not require the manufacture of a new template 10, but only the replacement of the tip 13 of the DLP 12.

Thickness of Zag Material

Workpiece 5 axial and radial engagement of the faceplate 1 with the mandrel 3 and a number of other reasons can cause uneven forces deforming the workpiece 5.

In this case, it is proposed that during the rolling process, the gap be taken to be slightly less than the thickness of the workpiece 5 (approximately 0.1-0.2 mm), and to prevent the formation of bubbles due to the accumulated shear of material from under the roller press b at its radius edge 7 c in its diametrical sections, perform grooves 14 (see Fig. H) which, in case of pressure, fills the excess material of the workpiece 5. The number of grooves 14, their depth, width and pitch are determined experimentally, based on the plastic properties of the material and the thickness of the workpiece 5 . Slots 14 may be performed seldom enough, for example, with a step of 10 mm and a section of 1 per 1 mm for soft

aluminum and corrugated for less ductile materials.

After completion of rolling the workpiece 5 along the generatrix of the truncated cone of the presser 6 and by means of the flanging roller 15 form

the external rim of the antenna, thus eliminating the need for a pressure roller (see, prototype), which shortens the production cycle and improves the accuracy of the antenna manufacturing. The installation angle of the axis of the roller press 6 in the caliper 8 relative to the mandrel 3 is determined so that the base of the truncated cone does not touch the mandrel 3 and the clamp 4 during rolling. The forming truncated cone of the roller press 6 determines the angle of inclination of the formed external rim of the antenna to the axis (to the axis

mandrels 3). After forming the outer rim, release the clamp 4 and remove the finished antenna from the mandrel 3. Thanks to the convex shape of the working edge 11 of the template 10, the implementation of the tip 13 of the DLP 12 spherical, there is no need to produce various templates 10,

In addition, the presence of grooves 14 on the radial edge 7 of the roller press 6 significantly reduced the requirements for the accuracy of maintaining the gap between the roller press 6 and the mandrel 3. These differences made it possible to significantly simplify the manufacturing technology, practically eliminate rejects and achieve the accuracy of manufacturing the antenna profile equal to the accuracy of the original mandrel.

Claims (1)

The claims A device for manufacturing an antenna mirror, consisting of a faceplate equipped with a mandrel rotation mechanism made in the form of an axisymmetric convex body of rotation mounted coaxially on the faceplate, a clamp for fixing the antenna mirror blank on the mandrel axis, a roller press made in the form of a truncated cone with a radial edge along the perimeter of its larger base and installed in a support equipped with transverse and longitudinal relative to the axis of the faceplate movement mechanisms, a template with a working edge, prof Or, which corresponds to the profile of the forming mandrel, fixed perpendicular to the axis of the mandrel, and the following mechanism, including a linear sensor 77193 10 movements kinematically connected to the caliper and in contact with its tip with the working edge of the template, and an amplifier associated with mechanisms for lateral and longitudinal movement of the caliper, characterized in that, in order to increase the accuracy and simplify the technology. linear displacements are made spherical with a radius equal to the radius of the radial edge of the roller press, and the profile of the working edge of the template is made 15 convex, the roller press is installed in the caliper so that its axis is at an acute angle to the axis of the mandrel, on the radial edge of the roller press in its diametrical In 20 sections, grooves are made, the depth, width and pitch of which are determined from the plastic properties and thickness of the workpiece material. Figure 2. Editor T. Kurkova Compiled by A. Borisov Tehred M. Morgenthal Thebes Proofreader V. Petrash