Practical and graphic robots from an armchair. Practical and graphic robots from a chair Zavdannya to graphic robots 4

a) Pobudova of the third kind behind two assignments.

Having spent the third type of detail behind two data, put down the dimensions, visually, the details are shown in axonometric projection. Zabdannya taking from the table 6. Visiting the vikonannya zavdannya (Fig. 5.19).

Methodical instructions.

1. The chair is repaired with the help of the axes of the symmetry of the views. View both types, and also be seen as types and frame of the chair take: 30-40 mm. There will be a head view and a view from above, Two prompting the view to vikoristovuyut for the armchair of the third type - the type of evil. The whole view is drawn according to the rules of prompting the third projection of points, for which two projections are given (div. Fig. 5.4 point A). When designing the details of the folding form, it is brought to all three images at once. With the induction of the third type in the given plant, as in the offensive, it is possible not to start the axis of projections, but to speed up the "axle-free" projecting system. For the coordinate area, you can take one of the faces (Fig.5.5, area P), from which coordinates can be drawn. For example, if you turn the direction on the horizontal projection for point A, then turn the coordinate Y, transferred to the profile projection, you can accept the profile projection A 3. As the coordinate area can take the same projection area of ​​the R symmetry, in the same way from it to lead along the coordinates Y C, Y A, yak is shown in Fig. 5.5, for points A and C.

Small. 5.4 Fig. 5.5

2. A skin part, like a bi-foldable one, is not a bullet, it can be broken into a number of geometric bodies: a prism, a paramid, a cylinder, a cone, a sphere, etc. The design of the details is completed before the design of the geometrical objects.

3. The size of the objects needs to be applied only to induce the kind of evil, so as in the case of the bagatech in the fall it is necessary to apply the part of the size to the whole species.

4. For the visual image of virobiv or warehouse parts in the technology of storing axonometric projections. It is recommended to read the chapter "Axonometric projections" in the course of the drawing of geometries beforehand.

For a rectangular axonometric projection of the sum of squares of performances (indicators) created by the road 2, tobto

k 2 + m 2 + n 2 = 2,

de k, m, n-performance (indicators) created along the axes. In the isometric

projections all three functions for the same purpose, tobto

k = m = n = 0.82

Practically for the simplicity of the induction of the isometric projection, the efficiency (indicator) of the creation, equal 0.82, will be offset by the induction of the efficiency, equal to 1, so that the image of the object will be increased by 1 / 0.82. The X, Y, Z axes in the isometric projection fold over the cut 120 °, with the whole Z axis, direct it perpendicularly to the horizontal line (Fig. 5.6).

In the dimensional projection, there are two functions of equal to oneself, and the third, in the vicinity, is equal to 1/2 of them, so that,

k = n = 0.94; a m = 1/2 k = 0.47

Practically for the simplicity of the inducement of the dimensional projection, the performance (indicators) of the performance, equal to 0.94 and 0.47, be replaced by the guided performance, equal to 1 and 0.5, so that the image of the object is equal to 1.06 / 0. The Z axis in a rectangular diameter is straight perpendicular to the horizontal line, the X axis is at 7 ° 10 ", the Y axis is at 41 ° 25". So yak tg 7 ° 10 "≈ 1/8, and tg 41 ° 25" ≈ 7/8, then buuvati tsі kuti is possible without a protractor, yak is shown in Fig. 5.7. At a straight-sided diameter along the X and Z axes, natural sizes are displayed, and along the Y axis with a speed rate of 0.5.

Axonometric projection of the stake into the zagalny vipad elips. If the circumference lies in the area, parallel to one of the projection areas, then the small weight of the ellipse is always parallel to the axonometric rectangular projection of this axis, which is perpendicular to the area of ​​the imaged circumference, while the whole area is small.

In this particular detail, it is recommended to view the visonati in an isometric projection.

b) Simple development.

After visiting the third view of the detail behind two houses, visonati is simple in size (horizontally and vertically), put down the dimensions, visonati on the right image of the details in axonometric projection from the viriz of 1/4 of the part. Zavdannya taking from the table 7. Visiting the vykonannya zavdannya (Fig. 5.20).

Graphic robot visonati on arkushi krelyarskogo paper in A3 format.

Methodical instructions.

1. If you are a visitor, I respect you for those who have a symmetrical detail, then you need one image to show half the form and half the size. At the same time on viglyadі do not show lines of invisible contour. cordon mіzh zovnishnim viglyadom and serve as a dot-and-dash line. image development details from the vertical axis of the symmetry right-handed(Fig.5.8), and from the horizontal axis of symmetry - from the bottom(Fig. 5.9, 5.10) right on the projection area is displayed.

Small. 5.9 Fig. 5.10

If you use the projection of the rib on the axis of symmetry, you can trace the contour of the object, then the shape is shown, as shown in Fig. 5.11, and if you hit the edge along the symmetry to fit the inner outline of the object, then the shape is shown, as shown in Fig. 5.11. 5.12, so that both in that and in the lower projection of the ribs are taken. Cordon with rozrizom and kind of show the essence of the wicked line.

Small. 5.11 Fig. 5.12

2. On the images of symmetrical details, to show the internal devices in axonometric projection, to display the viral 1/4 of the part (the best illumination and closeness to the image 5.8). Tsey viriz does not match with rozriz on orthogonal projections. So, for example, on a horizontal projection (Fig. 5.8), the symmetry axis (vertical and horizontal) move the image to the chotiri quarter. Visible razrіz on the frontal projection, as they see the lower right quarter of the horizontal projection, and on axonometric image I see the bottom half of the model. Rigidity ribs (Fig. 5.8), which were used in late growth on orthogonal projections, should not be shaded, but shaded in axonometry.

3. Pobudova model in axonometry with the viriz of one square is shown in fig. 5.13. The model of the target is prompted in thin lines to grow in frontal and profiled areas, to pass through the Ox and Oy axes. When I lay a quarter of the models between them, I can see the inner design of the model. Razryayuchi model, the area is covered on the surface of the slid. One of these should lie at the front, which is in the profile area of ​​the rise. Leather from cich slіdіv is a closed lamana line, which is stored in the form, along which area of ​​growth it overflows with the edges of the model and on the surface of the cylindrical opening. Figuri, scho to lie in the area of ​​growth, in axonometric projections to shade. In fig. 5.6 shows a direct line of hatching in an isometric projection, and in Fig. 5.7 - in dimensional projection. The lines of hatching are applied parallel to the axes, viewed on the axonometric axes Ox, Oy and Oz from the point O in the isometric projection of the same direction, and in the dimensional projection on the axes Ox and Oz - the same Oh, abo Oz.

4. It is recommended that the viconati be in a dimensional projection at all details.

5. In the case of a true appearance, the overflow of the requirement is speedy in one of the ways of drawing geometry: wrapping, summing, plane-parallel shifting (wrapping without specifying the position of the axes) or changing the projection areas.

In fig. 5.14 is given a pobudov projection and a true view of the overflow of the frontal-project with an area of ​​G chotirikutnoy prisms by the method of changing projection areas. Frontal projection will be lined with a line, which will rise from the next area. For the horizontal projection of the overflow, we know the points overlap of the edges with prisms with an area (points A, B, C, D), alternately їх, visible to a flat figure, the horizontal projection is where А 1, В 1, С 1, D 1.

symmetry, parallel to the axis x 12, It will also be parallel to the new axis and transfer from it to the country, b 1.In the new systems of projection areas, the points to the symmetry axis are kept the same, as in the old system, so for the known ones it is possible to make the change ( b 2) From the axis of symmetry. Concurrently, the points A 4 B 4 C 4 D 4 are removed, the true view of the overflow by the area Г of the given floor is visible.

In fig. 5.16 is given a pobudov spravzhny viglyad overset of the truncated cone. The great length of the ellipse begins with points 1 and 2, the small length of the ellipse is perpendicular to the great axis and passes through the middle, so that point O.

The elips are flanked by a straight line overflow of the other area from the edge of the cone, that is, a straight line, passing through points 5 and 6. The intermediate points 3 and 4 are prompted behind an additional horizontal area G. In fig. 5.17 is given a pobudova overreturn of parts, which can be stored from geometric bodies: a cone, a cylinder, prisms.

Small. 5.16

Small. 5.17

c) Folding rozrizi (folding step rozriz).

Having spent the third kind of detail behind the two danims, visonati means the foldable dimensions, after being abducted from the area given on the armchair, put down the dimensions, the visonati are actually images of the details in the axonometric projection. Zavdannya taking from the table 8. Visiting the vykonannya zavdannya (Fig. 5.21). Graphic robot viconati on two archways of a krelyarsky paper in A3 format.

Methodical instructions.

1. With a vikonanny course project, I have to respect those who foldable stages of the image are displayed according to the following rule: large areas like bi. It is not possible to encode between the common areas, but the Danes are drawn up in the same way, like simple ones, not along the axis of symmetry.

2. At the factory part of the measurements through the visibility of the third image, it is not sufficiently well-adjusted, so it is necessary to apply the size separately before the prompts, placed at the section "Applying the size", and not a copy.

3. In fig. 5.21. indications of the butt of the image of the details in the rectangular isometric with the folding virizom.

d) Folding rozrіzi (folding lamanium rozrіz).

Having spent the third type of detail behind the two danims, display the meaning of the foldable lamania razriz, put down the size. Appointment taken from the table 9. Visitor vison (fig. 5.22).

Graphic robot visonati on the arkushi krelyarsky paper in A4 format.

Methodical instructions.

In fig. 5.18 shows the image of a folding lamina rozrizu, rendered by two different profiled-design areas. To correct the size in an unspoken view when the object is overturned by stolen areas, and the area at the same time with the right figures must be rotated along the line of overshoot of the areas to the position, parallel to the frontal projection area (in Fig. 5.18 - to the parallel plane of the projection) Pobudova of the folding lamina design is based on the method of wrapping around the projecting strand (div. Course of drawing geometries). The appearance of evil in the line of retreat is not reflected in the graphical design of the folding design - it is designed as a simple design.

Options for individual buildings. Table 6 (Pobudova of the third type).

Add a vikonannya zavdannya.

Small. 5.22

Small. 99. Head to graphic robot No. 4

3) Chi є open in detail? Yaksho є, yaku the geometric shape of the otvir maє?

4) Know on the skin from the views all planes of surfaces perpendicular to the frontal, and then - horizontally of projection areas.

2. According to the sketch of the details (Fig. 99), select the chair in the required number of views. Apply on all views and mark points A, B and C.

13. Procedure for encouraging the image on the armchairs

13.1. How to induce the image on the basis of the analysis of the shape of the object. As you already know, a large number of objects can be displayed as a single geometric body. Otzhe, for reading and vikonannya armchair is required by the nobility, as the image of a geometric body.

Now, if you know, as on the armchair you can see such a geometric body, and you know how to design the tops, edges and edges, you will be easier to read the armchair objects.

A part of a car is depicted on a little 100 - a deflection. Analyze your form. Is it possible to distribute it at every point of view? What to do on the food chain, you know characteristic signs, Powering images of geometrical objects.

On a baby 101, and one of them is seen cleverly in brown color. Yake geometrically tilo maє such projections?

The projections of the straight-line viewers are characteristic of the parallelepiped. Three projections and an image of the parallelepiped, seen on little 101, and in brown color, given on little 101, 6.

On little 101, in the blue color it is cleverly seen, and it is geometrically visible. Yake geometrically tilo maє such projections?

With such projections, the prize was created when looking at the image.