FI111231B - alignment Ring - Google Patents

Description

111231

ADJUSTING THE RING

The invention relates to an adjusting ring mounted on lathe jaws and clamped in place by jaws, which is held by some of the gripping surfaces of the jaws when the other gripping surfaces of the jaws are machined to the desired mounting diameter.

Turning the lathe gripping jaws to a certain diameter size to receive better between the jaws is known in the art. For a successful turning of the jaws, the jaws are arranged in a clamping space by squeezing a rigid ring of a diameter between them so that the gripping surfaces of the jaws that are to be turned are already very close to the diameter of the part to be fastened between them. In order to avoid excessive turning of the jaws, it is known that there is a series of such rings for laths of various diameters. The appropriate tire is selected from the kit. The rings have a diameter of about 2 mm, which is indicated by the slight turning of the jaws with varying dimensions of the parts to be turned.

However, by using known tires, the required number of tires becomes considerable. If the lathe has a machining range from 100mm to 500mm, about 200 rings are required. If a 4 mm step is enough, 100 more rings are needed.

The adjusting ring of the invention solves the problem of reducing the number of rings. The invention is characterized by what is stated in the claims.

It is an object of the invention to provide a new type of adjusting ring by means of which the jaws can be tightened for turning to a plurality of positions of different diameters and thus reduce the need for adjusting rings. In the same ring, the mating surfaces are grouped in the same pitch as the number of jaws in the laths. By selecting a suitable clamping surface group from the ring and installing the ring on the jaws so that the clamping surfaces of the desired cluster align with the jaws, the jaws can be locked for various diameter dimensions. On the same adjusting ring, mating surface groups can be formed on both the inner periphery and the outer periphery, which cause the jaws to have different diameters. Of course, the jaws can also be turned for internal grip, as is known per se. > A linear contact is formed between the contact surface of the adjusting ring and the jaw due to the curved projections of the adjusting ring. When using the three jaws, additional adjustment can be made by placing an adjusting strip between, for example, the jaw and the mating surface on only one part of the jaw, since the adjusting strip about 1-2 mm thick does not move the line contact

If the contact surface were to follow the jaw surface as with known circular rings, the addition of one strip on the other two jaws would be difficult to move to the jaw edge asymmetrically, and in this position the lathed jaw surface would not match the surface of the attachment.

In the following, the invention will be explained in more detail with reference to the accompanying drawing, in which

Figure 1 is a side view of the adjusting ring.

Figure 2 is a side view of the adjusting ring locked on the lathe jaws.

Figure 3 is a front view of the position of Figure 2.

An adjustment ring 1 according to the invention is shown in Figure 1.

The outer ring of the tire has a plurality of curved projections D1 to D5.

The projections D1 extend farther from the center of the ring and in order D2, D3, D4, D5 represent a decreasing diameter dimension, respectively. Each of the protrusion types D is represented by an evenly spaced outer periphery at an angle of 120 *.

The protruding types represent a stepwise variable diameter, e.g., at 2 mm intervals. The step from D1 to D2 then has a radius of 1 mm. Similarly, the step from D2 to D3 is 1 mm, etc.

The ring can be set to press the three jaws of the lathe into five different positions, by selecting a group 3 111231 D1 .... D5 as matching surfaces. The ring is available with a diameter range of 8 mm for the jaws and covers a diameter range of 10 mm. The figure shows the diameter range in dashed circles.

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The projections D are outwardly curved. The radius of curvature is r and it is substantially smaller than the radius R of the ring

sometimes there are inwardly curved recesses into which spaces the edges of the jaws can be freely located in the mounting position.

If the jaws are pressed on the inside of the adjusting ring 1 to lock the jaws for turning, one of the groups A ... D can be selected as contact surfaces. The members of each group are also at an angle of 120 * to each other for three jaws. The counter pins A-D are straight and are pressed against the curved outer surface of the jaws. Here, too, there is a line contact between the ring and the jaws. The mating surfaces A to D may be slightly curved, with the curvature facing the center of the tire, as shown on one of the surface D of the tire.

In Fig. 2, the adjusting ring 1 is clamped between the jaws by means of some gripping surfaces 6 of the jaws 3. On the adjusting ring, a set of projections D1 against the jaws is selected. A piece of slightly larger diameter than the diameter DL between the gripping surfaces 7 of the jaws will be attached to the jaws.

Therefore, in the situation of Figure 2, the blade 4 is slightly turned away from the gripping surfaces 7 of the jaws. At the same time, the gripping surfaces 7 also have the same surface curvature as the piece to be fastened. The jaws in the clamping position are in the same or nearly the same position when turning to fit the part as they will be after attaching the part to be turned. With this arrangement, all the turning parts * '' of the same set become fixed in the same way and the curvature of the jaws is the same as that of the attachment surface of the piece.

, · 'These points are important in automatic lathes that change tracks independently.

Figure 3 is a front view of Figure 2. The fitting turning of the jaws 3 is done with the blade to the diameter DL.

4 111231 The adjusting ring can be locked into the jaws from the outside or inside. The adjustment ring I may be locked in the jaws of the back side 8, or by any means of the jaws 5,6,7 incremental side surface. When the adjusting ring 1 is an open ring in the middle, the turning of the jaws can be performed with the blade 4 through the central opening of the adjusting ring on the surfaces of the jaws, for example 6 or 5. The ring is easily manufactured by combustion cutting even laser cutting.

Claims (3)

5, 111231 An adjusting ring p. (1) which is internally or externally mounted on the lathe jaws (3) and locks in place by means of the jaws, wherein the outer and / or inner ring of the ring (l) comprises a plurality of < A), (B), (C), (D) or (D1). ... (D5) such that the jaws (3) can be tightened to positions corresponding to a plurality of diameters by selecting a desired contact surface group from the adjusting ring and locking the adjustment ring (1) directly between or around the jaws (3) shaped for line-contact contact with the jaw clamping surfaces (5), (6), (7), (8), wherein the mating surfaces (D1 ... D5) disposed on the outer periphery are curved outwardly directed projections having a radius of curvature (r) substantially smaller whereas the radius (R) of the outer ring of the adjusting ring and the counter surfaces (A ... D) disposed on the inner ring are essentially straight surfaces or curved surfaces towards the center. 2. Justeringsring enligt patent krav 1 kangnetecknad därav, att diametermät-tets trappformning i justeringsringen (1), som har ästadkommits med hjälp av 20 gmppema (Dl) ..... (D5) eller (A ....... D ), from 2 to 5 mm. Adjustment ring according to Claim 1, characterized in that the diameter dimension produced by the groups (D1) ... (D5) or (A ... D) has a step size in the adjustment ring (1) of between 2 and 5 mm. Adjustment ring according to Claims 1 and 2, characterized in that the mating surfaces are grouped for three or four quadrate jaws (3). f1 6 111231 5 1. Colorful hacker (3) insidigt eller utsidigt anpassande och taan sin plaats med hakoma läsande justeringsring (1), colors ringens (1) yttre och / eller inre cirkel bestär on this cirkel anpassande flera anliggningsytgmpper (A), (B), (C), (D) or (Dl) ........ (D5) delade enligt hakom antal attoma search (3) kan spännas till flera olika diametermätt motsva-rande positioner genom att field ffän justeringsringen en selfskad anliggningsytgrupp och 10 genom att lasa justeringsringen (1) dig mellan hakoma eller kring dem genom att använda ytor, kännetecknad därav, att anliggningsytoma är formade för en linje-anliggningskontän som (skrit mot) (7), (8), Colors de pa yttre cirkel placerade anliggningsytoma (D1 .... D5) with bag, utat rickshaws, stalk crinkling (r) and tired ligen mindre än radie (R) päererringringens yttre cirkel och de 15 pa inre cirkel placerade anliggningsytoma (A ..... D) andra sidan väsentligen raka ytor eller mot centrumet bagiga ytor. 3. Justeringsring enligt patent krav 1 och2 kangnetecknad därav, att anligg-- ningsytoma grupperade för tre eller fyra hakor (3), som är delade jämnt. 1 i