SU751664A2 - Appliance for drawing transformation axis and auxiliary orthogonal projections - Google Patents

Description

The device is referred to as graphical instruments and is designed to construct the P | reorganized 11 axis and rectangular auxiliary projections, and the t. 1k / k can be used for L-weekd aralllian and mutually perpendicular right angles to equal parts.

According to the main author. St. No. 95128 is known for a device made in the form of a base mounted on a transparent spacer, which is a rectangular frame, equipped with a protractor and a rotary right angle HIIiKom-kazatele;;: 2c:) w ::: ::. coincides with the center trakuls-tire. The upper side of the base of the inocpe.iiCTBaM twin parallel links is fixed to the ruler, and on the lateral side the transcipin is reinforced ;:) so that the peltry is; t :: and C; S. Osgovani and engine coincide. On the plane of the base there are risks parallel to its sides, and at the points of intersection: and the trough there are through holes for the writing / drawing device.

The disadvantages of the known construction are the difficulty of working with the device and the lack of accuracy in the construction of the transformation axis.

The aim of the invention is to improve the accuracy of the constructions i to speed up their implementation.

This is achieved by the fact that in the center of the transparent slider a round hole is made, in which a disk is installed with the possibility of rotation and fixation relative to the slider, along the contour of which four scales with steps from 0 to 90 ° are inserted, through

10, the center of the disk is held mutually perpendicular to the horizontal and vertical risks; in this case, the horizontal risk has two scales with millimeter divisions and rms with a reference point in the center of the disk, and

15, in parallel with the sides of the engine, there are risks, at the points of which Pegesechein have through holes.

FIG. I shows the proposed device, a general view; in fig. 2 shows an example of the construction of 20 rectangular auxiliary projections of two parallel, straight, in a given, direction of projection of the ray of light onto the plane of projection of the general poliozheya to determine the actual size of the distance between them; in fig. 0-- -6-sequential gel pslo;:; e1 and prnpi: suitable for pimer, :: mapped in fig. 2; in fig. 7 - an example of construction: rectangular axioometric projection of an object for a given

projecting beam; in fig. 8-13 - post-sequence positions of the device as applied to the example depicted on f; 7; in fig. 14 - npiiMCp use, 1 p1b for pa .11 part; oeni LO | 1aNyh lshp-dd communication; , and FIG. 5 - L1ri: memeram ipolz u vali p | ribora for usuroslIlIsl.llyh LP1M1Y communication.

The device consists of a rectangular box /, between two two of which 2 are mounted, equipped with a latch 4. In the center of the slider there is a hole of an abrupt shape in which the disk 5 is dimensioned along the contour of the disk; 1 the spring is divided into four scales divided from 0 to 90 °. The disk is pressed against the core colp 6, which is fixed on the engine by the clamp 7 and; | become possible inoBOipoTa, for which it has a groove in the shape of an arc of a circle.

On the upper side of the base, by means of links 5, a ruler 9 is mounted. On the base, the slider and disk are made horizontal and vertical risks, and through the base and slider at the intersection points of the marks there are through holes.

The order of work with the pre-authorized tool is as follows.

Given two parallel straight lines a (oi and f :: -, and b (b, and bi) in the closest position, it is necessary to determine the actual size of the distance between these straight lines; they are given by the direction of projection S (Si and Sz): impose a device pa drawing so that the central horizontal risk of the base, engine and disk coincides with the X axis (Fig. 2); direct, perpendicular Si and S2, which define the front f / d (fi p / 2} And the horizontal h (hi ir / la) traces of the plane Yad of the projections of the common position; find the points // 2 and P intersections of these straight lines with the disk circle, φ at the same time, on the angle a and p tangles, the bl-vertical vertical risk of the base is aligned with the dot. -Ys (Fig. 3) and the defrost point of the vi is removed. that the horizontal risk zeitralia coincides with the PI point (Fig. 4); it is combined with the previously marked NI point closest to the base risk, the intersection point of this risk with the central horizontal risk is fixed (and FIG. 4 is a point Mi), thus it is divided into a horizontal projection .Fi2Mi; V, from :: - to the plane of the projections; I mark with the first irisobuse in the drawing the point L -: the cut hole in the slider (Fig. 4), which also belongs to the transformation axis; and the base of the instrument is washed off the disk so that the risk of passing through

points Afj and Al (Fig. 4 ;, coincides with the previously marked Lc point on the disk (Fig. 5), thus with:, the natural value of the right-angled triangle of the nrojection nano-section compartment is natural; as a result; those of nostroropey iakhot joint horizontal position of the trace / g; mark the second point through the holes P on the slider (Fig. 5), which is irg;

conversion axis; The points L and P are connected (Fig. 6), and the axis determines the axis () (24 and transformations); after additional constructions, which are visible from

FIG. 2, the projections of the straight plane I plane, the length of the segment, are found, which corresponds to the natural value of the pasto π between the problem and the direct axis.

When. For example, when it is required to construct an axis of transformation of a rectangular axonometric construction of an object (Fig. 7), but given a right. S (5 | and S2) of the projecting beam, the octagon on the disk circumference of the point .Vo i Р, defined by the front f (/: and / р) v. the horizontal h (h and / i;) are traces of the supporting projection plane (Fig. 7); fix the angles oi and f) of the inclination of the traces of the plane to the smallpox | 2 of the plane; bl bl

the vertical base pitch to point N (Fig. 8) and the millimeter scale of the central horizontal disc risks indicate the point Db which is the horizontal projection of the point L of the frontal

trace of flat projection; turn the base of the disk on the disk like that. that its central horizontal risk coincides with point P (Fig. 9); combine the immediate base risk with the previously marked point L as a result of these constructions and 1 modeled horizontal projection / i2Wi, Vi of the axonometric plane; find the point L, which is the point and the intersection of the disk circumference with

risk (Fig. 10), for which the central risks of osnosis P-; the combined position of the ejection plane of the plane with the plane of the drawing is combined, thus combining the projection plane with the plane of the drawing allows for a continuous vertical image on it; obtaining the point L (fig. 8), the point / V (fig. 10), brings the device to the xxo position: rotate the base relative to the disk so that its risk passes through the previously found point K of the disk circumference; transfer the device to the drawing, central risks (e) e and the same, eu x and z (fig. 11),

note pa drawing iishu: IM device point K through the mirror in the school; They turn the axis of the disk relative to the disk so that its risk passes through the point .V, writing a device through

a hole in the base mark the point; V on

drawing; connect the obtained points, the constructed straight is the i24 axis of m24 (Fig. 11).

When constructing the iu axis, the transformation for conducting broken communication lines through the points of the horizontal projection of the object (fng. 7), the sequence of the projection of the object (Fig. 7), the sequence of work with the device is similar and is shown in FIG. 12 and 13. The construction of the axis i can be performed simultaneously with the construction of the points of the axis / njj.

To build equi-inclined links of the broken lines of the projection link, the central horizontal risk of the base is aligned with the transformation axis (Fig. 14) so that one of the slider holes coincides with the first link of the link that coincides with the direction of the projecting beam (in our case 2) then, through the hole, equidistant from the transformation axis, mark the point, which is further connected with the point of intersection of the transformation axis with the first link of the broken line.

To build a straight line parallel to a given one (Fig. 15), the device is superimposed on the drawing so that one of the slides

coincides with the given straight line, after which the ruler is drawn to the point and traced

desired direct path.

Claims (1)

1. USSR author's certificate Ho 195128, cl. In 43 L 13/14, 1967. 12 -1-- - --- i - i -. I  ,;.,. Lg, l „:; i: - /. :   ".V- m-- ,   . i  -.v . i-. V.: - V | , X, i vxy-- --T- t 7 6fb.-... /- one / € ; i h J /// 1 A 1A 2 to