RU2469216C2 - Part; part fastener and its manufacturing method - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: part with one-sided access for fastening with locating is made mainly of a plate and contains locating and fastening elements in the form of at least two through holes located in one or parallel planes. Profile of holes represents an order of circular radial n projections-cavities, which are similar and symmetrical relative to their middle parts, the maximum and minimum distances of which to the hole axis are located on concentric circles; at that, one of holes is made with n≥2, and the other one with n≥3, where n=2, 3, 4, 5… - number of projections-cavities of normal row of figures.

EFFECT: simplification of the design; reduction of manufacturing cost and prime cost of the assembly; improvement of manufacturability of the design and improvement of consumer and service performance of the product.

11 cl, 25 dwg

Description

The invention relates to the field of mechanical engineering, namely to basing and fixing, mainly sheet metal parts made by stamping, especially parts with one-side access, often used in welded structures of car bodies.

Known sheet-stamped welded part "Headlight cover" dash. 3302-8401532 / 33 of the car "Gazelle", collected during welding with the part "Front floor" dash. 321-50101010-10. During the assembly of these parts, the “Headlamp Cover” is based on two round Ø10 holes on cylindrical pins. In this case, deaf cavities are formed from the opposite side from the front near these holes during assembly with the part “Front floor”, as a result of which it is impossible to compress the part from the side of these cavities.

Since the part “Headlight cover” does not have sufficient rigidity, when it is joined with subsequent welding, significant deviations of the form from the nominal are obtained.

A fixing device for a part is known (see "Automatic lines from aggregate machines" edited by N.M. Voronichev, Zh.E. Tartakovsky, VB Genin, p. 112, fig. 6.2, second edition, Moscow, " Mechanical Engineering ", 1979), containing a latch mounted in the device body with the possibility of axial movement. It is assumed that at the same time several clamps (usually two) enter into the round holes of the base part. A conical and centering cylindrical surface for the part, a basic cylindrical surface for the latch itself mounted in the fixture body and made with the possibility of its axial movement in the fixture body, are made sequentially on the fixture.

On the opposite end from the entry cone, a transverse groove is made in the body of the latch for interaction with the drive, carrying out axial movement of the latch. The disadvantage of this device is that such fixing devices base the part along round cylindrical holes, but do not simultaneously clamp it.

A device is known in which when basing on two round holes in the part, one of the fixing fingers is made round in cross section and the other is usually rhombic in order to compensate for deviations in size between the base holes in the part, the rhombic finger being oriented in an angle in such a way so that the large diagonal of the rhombus is perpendicular to the line passing through the axis of the holes (see "Accessories for metal-cutting machines" edited by M.A. Anserov pp. 15-17, Fig. 13, third edition, Moscow, Leningrad, "Engineering e ”, 1966).

The disadvantage of this device is that the permissible deviations of the interaxal distances between the base holes depend on the clearances in the interface of the base hole-retainer, as well as the magnitude of the chord of the arc (the uncut cylindrical portion of the retainer) in contact with the base hole. An increase in the gaps in the retainer-part mating in order to increase the tolerance on the center distance is not always possible due to a loss in the accuracy of basing the part itself in space, and a decrease in the chord may not overlap the required deviation of the center distance and also reduces the bearing capacity of the holder.

A known design of a locking device (see the catalog of products of the SMS text, CKQ / CLKQ series of devices) containing a lock for fixing mainly sheet-stamped parts, including single-access parts, including a hollow lock having an entry cone and a cylindrical centering surface moreover, the latch is rigidly fixed in the housing of the device on the base cylindrical surface. A limiter is mounted inside the hollow retainer in the form of a traction of the clamping mechanism pivotally connected to the displacement drive fixed to the device body. In the limiter, a copy groove is made with the possibility of interaction with a finger rigidly fixed to the housing.

When moving from the drive, the limiter, along with linear movement along the axis of the lock, makes a complex (translational and at the same time rotational) movement and, with its protrusion, extends beyond the cylindrical centering surface of the lock due to the interaction of the finger with the copy groove of the limiter. In the process, when the part moves with its round holes along the latch (s), the protrusion of the limiter is recessed beyond the cylindrical surface, and at the time of clamping it goes beyond it and presses the part against the stop of the device. Structurally, said latches are made in cross section both round and rhombic.

The disadvantages of this design include the fact that the limiter is located inside the hollow retainer located in the base round hole of the clamped part. Thus, the radial dimension of the clamp, taking into account the strength characteristics of the limiter at the required clamping force, dictates the size of the base hole. Often, the basic technological holes in the product (car body) cannot be made significant, which narrows the scope of the specified device, which is confirmed by the size range of these devices from the above catalog (the size range of basic holes starts from 13 mm). At the same time, the axial dimensions of the clamp also depend on the movement of the limiter along the axis, which also narrows the scope of its application. In addition, a single-sided clamp by a limiter of thin sheet parts (clamping at one point) can cause unwanted plastic deformations in the part itself. The execution of the latch hollow reduces the manufacturability of its design and creates the prerequisites for the penetration of dirt into the mechanism, which affects the reliability of its operation as a whole, and the implementation of the latch with a rhombic even more weakens both the latch itself and the parts located inside it.

The base of the part on two round holes on the round and rhombic clamps imposes certain restrictions on the permissible interaxal deviations for the base holes.

The objective of the claimed invention is to eliminate the above disadvantages, as well as expanding technological capabilities.

In the inventive part with one-sided access for fixing with a base made mainly of sheet and equipped with elements of basing and fixing in the form of at least two through holes located in one or parallel planes, the profile of the holes is a series of identical and symmetrical relative to their midpoints circular radial n protrusions-depressions, the maximum and minimum distances of which to the axis of the hole are located on concentric circles, and one of the holes is made with n≥2, and the other with n≥3, where n = 2, 3, 4, 5 ... from the normal series of numbers.

When choosing the base holes for a part, the following parameters must be considered:

1) the tolerance for the distance between the base holes;

2) allowable guaranteed clearance in the mating part-retainer;

3) the profile of the base holes (value n);

4) the angular direction of the faces of the protrusions, hollows of the holes with respect to the line connecting the axes of these holes;

5) the rigidity of the part in the area between the base holes and the allowable amount of deformation of the part in this area;

6) the ratio in size between the base holes in the plane perpendicular to their axis, and the distance between the parallel planes in which they are (if the holes are in parallel planes).

The implementation of through holes (punching) in sheet-stamped parts of virtually any configuration does not present technical complexity and does not complicate the technology of using the inventive clips in general.

In the inventive latch, designed for basing and fixing, mainly sheet-stamped parts with one-sided access and equipped with a successively tapered taper surface, an axial displacement limiter, cylindrical coaxial centering parts for the part and the base for the latch, the stopper is integral with the lock, the limiter profile is made with an equidistant the gap relative to the profile of the hole parts in the form of circular alternating radial n protrusions-depressions (n = 2, 3, 4 ... from normal th row numbers), the maximum and minimum distances from the axis of the retainer are located on the circumferences concentrically base surface. The shape of the hollows-protrusions and their mutual angular position are selected, as a rule, the same.

The latch is made with the possibility of rotation on the base surface, where: d _2f > d _1d , and n≥2;

d _2f - the diameter of the circle of the protrusions of the retainer;

d _1d - the diameter of the circle of the troughs of the hole parts.

In addition, d _1e > d _3ph > d _1ph ,

where d _1d is the diameter of the circumference of the hollows of the hole in the part;

d _3ph is the diameter of the cylindrical centering surface of the retainer;

d _1f is the diameter of the circle of the hollows of the retainer.

It should be noted that d _{1d is} greater than d _3f by the amount of the guaranteed clearance, which does not violate the accuracy of centering of the fixed part (the conditionally indicated diameters coincide in the drawings).

The latch is equipped with a drive element for rotation around its axis, for example, in the form of a through hole perpendicular to the axis of the latch located on the base cylindrical surface.

The base cylindrical surface may dimensionally coincide with the centering surface. The number of protrusions-depressions can be any and depend on many factors, such as, for example, the dimensions of the hole in the sheet-stamped part, the manufacturability of the specified hole, the rigidity of the part at the clamping point, design considerations when designing the part itself, the minimum possible angle of rotation of the latch (with increasing numbers n the angle decreases) and other factors.

The base surface of the latch is made cylindrical coaxially with the centering surface, which makes it possible to constructively rotate the latch without displacement in the space of the base part.

, причем

In the inventive method of centering and securing, mainly sheet-stamped parts with one-way access, having at least two parallel through holes, the fixing process is carried out by pre-aligning the axes of the holes in the part with the axes of the fixtures of the fixture, followed by moving the parts along the axes along the entry cones on a cylindrical centering surface, the part is moved beyond the tabs of the clamps by an amount L, after which they rotate the clamps around their axes

, and

where L is the guaranteed gap between the tabs of the clamps and the part;

m is an arbitrary number (0, 1, 2, 3, 4 ... - from the normal series of numbers);

n is the number of protrusions-depressions (n = 2, 3, 4 ... from the normal row

numbers).

To carry out clamping after a turn, the clamps are moved in the opposite direction to the part along their axes by an amount L until the clamps of the clamps and the part are forcefully closed through its section with the stops of the device.

The following embodiments of the proposed method are possible:

с одновременным перемещением фиксаторов вдоль своих осей на величину L до момента силового замыкания выступов фиксаторов и детали через ее сечение с упорами приспособления.1. After moving the part beyond the tabs of the clamps by an amount L, the latches simultaneously rotate around their axes by an angle

with the simultaneous movement of the clamps along their axes by an amount L until the moment of power closure of the protrusions of the clamps and the part through its cross section with the stops of the device.

и их перемещение производят на величину L₁, причем L₁<L, после чего производят перемещение фиксаторов до момента силового замыкания выступов фиксаторов и детали через ее сечение с упорами приспособления.2. After moving the part beyond the protrusions of the clamps by an amount L, they simultaneously rotate the clamps around their axes by an angle

and their movement is carried out by the value of L ₁ , with L ₁ <L, after which the clamps are moved until the projections of the clamps and the part are closed by force, through its section with the stops of the device.

и их перемещением производят перемещение фиксаторов на величину L₁, причем L₁<L, а перемещение фиксаторов во время поворота производят до момента силового замыкания выступов фиксаторов и детали через ее сечение с упорами приспособления.3. After moving the part beyond the tabs of the clamps by an amount L, before turning the clamps around their axes by an angle

and their movement produce the movement of the clamps by the amount of L ₁ , moreover, L ₁ <L, and the movement of the clamps during rotation is carried out until the moment of force closure of the protrusions of the clamps and the part through its cross section with the stops of the device.

и их перемещением на величину L₂ производят перемещение фиксаторов на величину L₁, причем L₁+L₂<L, а после поворота с одновременным перемещением производят перемещение фиксаторов до момента силового замыкания выступов фиксаторов и детали через ее сечение с упорами приспособления.4. After moving the part beyond the tabs of the clamps by the amount of L before the simultaneous rotation of the clamps around their axes at an angle

and by moving them by the value of L ₂ , the clamps are moved by the amount of L ₁ , moreover, L ₁ + L ₂ <L, and after rotation with simultaneous movement, the clamps are moved until the tabs of the clamps and the part are forcefully closed through its section with the stops of the device.

.5. After moving the part beyond the protrusions of the clamps by the amount L, the rotation of the clamps around their axes is made at an angle

.

The claimed solution is illustrated by the drawings:

Figure 1 - front view - detail "Headlight cover" with two holes for the clamp with centering (n = 4);

Figure 2 - section aa in figure 1;

Figure 3 is a section bB in figure 1;

Figure 4 - detail "Headlight cover" with two holes for the clamp with the base (the first hole with n = 4, the second hole with n = 2);

Figure 5 - retainer - front view;

6 is a view a in figure 5 (with n = 4);

Fig.7 is a section bB in Fig.6;

Fig. 8 is a view A in Fig. 5 (with n = 2);

Fig.9 - the latch is rotated through an angle - α in Fig.8;

Figure 10 is a view A in figure 5 (with n = 3);

11 - the latch is rotated by an angle - α in figure 10;

Fig. 12 is a view A in Fig. 5 (with n = 4);

Fig.13 - the latch is rotated by an angle α in Fig.12;

Fig. 14 is a view A in Fig. 5 (with n = 5);

Fig.15 - the latch is rotated by an angle - α in Fig.14;

Fig. 16 is a view A in Fig. 5 (with n = 6);

Fig.17-latch rotated by an angle α in Fig.16;

Fig. 18 is a view A in Fig. 5 (with n = 8);

Fig.19 - the latch is rotated by an angle - α in Fig.18;

Fig - position of the latch in the part with one-sided access before fixing;

Fig - moving the latch according to claim 6 of the formula (each action is indicated by a separate arrow);

Fig - moving the latch according to claim 7 of the formula;

Fig - moving the latch according to claim 8 of the formula;

Fig - moving the latch according to claim 9 of the formula;

Fig - moving the latch according to claim 10 of the formula.

The claimed part 1 (see Fig. 1, 2, 3, 4), mainly made by stamping from a sheet with one-sided access, containing elements of basing and fastening in the form of at least two through holes 2 and 3 located in one or parallel planes , the profile of the holes is a series of identical and symmetrical relative to their midpoints of circular radial n protrusions-depressions, the maximum and minimum distances of which to the axis of the hole are located on concentric circles, and one of the holes is made with n≥2, another with n≥3, wherein n = 2, 3, 4, 5, ... - from the normal sequence of numbers.

The claimed retainer (see FIGS. 5-19) contains an entry conical surface 4, an axial displacement limiter (for the part) in the form of protrusions 5 and depressions 6 located radially from the axis of the retainer at its periphery, the cylindrical surface 7 centering and coaxial to the part the base cylindrical surface 8. As a drive element for rotation, for example, a through hole 9 may be provided, made in the base surface perpendicular to the axis of the latch. The length of the base surface is selected taking into account the possibility of linear movement of the latch by an amount L. As a drive for linear movement, for example, a T-shaped shank 10 located on the end of the latch opposite from the entry cone can serve.

The diameter of the centering surface of the retainer d _3f is selected slightly larger than the diameter of the circumference of the depressions of the retainer d _1f with the aim that when removing a part 1 having a certain thickness S (see Fig. 20) from the retainer 11, its protrusions-troughs are oriented approximately equidistantly in angle protrusions-depressions of the hole of the part (loading-unloading moment) at the moment of passing the end 12 of the part 1 of the reciprocal end 13 of the protrusions so that the latter do not prevent the part from coming off the latch.

Due to the fact that the centering diameter of the retainer (d _3ph ) is larger than the diameter of the hollows of the retainer (d _1ph ), a chamfer 14 (see Fig. 7), passing from the hollow, is performed at the boundary of the fit of the depressions to the centering cylindrical surface on the centering surface and contributing to the unhindered loading of the part on the latch. The number of chamfers corresponds to the number of hollows of the retainer.

, причем

The method of using the claimed device (see Fig. 20, 21) includes preliminary alignment of the axes of the holes 2 and 3 with the axes of the fixtures 11 of the device, followed by the advancement of the parts along the axes along the entry cones 4 onto the cylindrical centering surface 7 behind the protrusions 5 of the fixtures by an amount L, after which rotate the clamps around their axes at an angle

, and

where L is the guaranteed gap between the part and the tabs of the clamps;

n is the number of protrusions-depressions;

m is an arbitrary number (0, 1, 2, 3, 4 ... - from the normal series of numbers).

To perform clamping after a turn, the clamps 11 are moved in the opposite direction along the axis of the part 1 by an amount L until the moment of protrusion of the protrusions 5 of the clamps 11 and the part 1 through its cross section (thickness S) with the stops 15 of the device (see Fig. 20, 21). At the same time, the part, along with the base, is also clamped, so it is possible to carry out various technological operations with it, in particular automatic welding. Such a case may occur, for example, as a result of design constraints requiring a decrease in the axial displacement of the latch in parts with one-side access despite the need to use two stand-alone drives (turn drive and move drive). The value of L in this case is limited only by the guaranteed clearance necessary for rotation and therefore can be minimized.

The following applications of the proposed method are possible:

и перемещение фиксаторов на величину L до момента силового замыкания выступов 5 фиксаторов и детали 1 через ее сечение с упорами 15 приспособления производят одновременно. В этом случае деталь наряду с базированием также зажата, причем фиксация и зажим могут быть произведены от одного привода, например от привода осевого перемещения (поворот может быть произведен через байонетный паз корпуса приспособления пальцем, смонтированным в отверстии 9 фиксатора). Следует заметить, что останов ограничителя (выступов фиксатора) в крайних положениях (при зажиме и разжиме) производится в момент движения фиксатора по винтовой линии, поэтому колебание конечного положения разжима по оси, что связано, например, с износом в процессе эксплуатации либо другими факторами, может сказаться на точности останова по углу. К достоинствам данного способа можно отнести использование одного привода и более быстрый зажим.1. The method of using the claimed device (see Fig. 20, 22) also lies in the fact that the rotation of the latches 11 around their axes at an angle

and moving the clamps by an amount L until the moment of power closure of the protrusions 5 of the clamps and the part 1 through its cross section with the stops 15 of the device are produced simultaneously. In this case, the part along with the base is also clamped, and the fixing and clamping can be made from one drive, for example, from an axial displacement drive (rotation can be made through the bayonet groove of the fixture body with a finger mounted in the hole 9 of the lock). It should be noted that the stop of the limiter (tabs of the clamp) in the extreme positions (during clamping and expansion) is performed at the moment the clamp moves along the helix, therefore, the fluctuation of the final position of the expansion along the axis, which is associated, for example, with wear during operation or other factors, may affect the accuracy of a corner break. The advantages of this method include the use of a single drive and a faster clamp.

и их перемещение производят на величину L₁, причем L₁<L, после чего производят перемещение фиксаторов до момента силового замыкания выступов 5 фиксаторов и детали 1 через ее сечение с упорами 15 приспособления. В этом случае зажим детали выступами фиксатора производится перпендикулярно к плоскости зажима, что бывает важно в ряде случаев. Такая реализация способа может быть произведена также одним приводом при помощи байонетного механизма, имеющего наряду с винтовым пазом примыкающий к ней прямолинейный перпендикулярный плоскости зажима участок паза, сориентированный по оси фиксатора и соответствующий участку зажима.2. The method of using the claimed device (see Fig. 20, 23) also lies in the fact that the rotation of the latch 11 around its axes at an angle

and their movement is carried out by the value of L ₁ , with L ₁ <L, after which the clamps are moved until the moment of the force closure of the protrusions 5 of the clamps and the part 1 through its section with the stops 15 of the device. In this case, the clamping of the part by the protrusions of the clamp is made perpendicular to the clamping plane, which is important in some cases. Such an implementation of the method can also be carried out by a single drive using a bayonet mechanism, which along with a screw groove adjoins a straight section perpendicular to the clamp plane of the groove, oriented along the axis of the clamp and corresponding to the clamp section.

и их перемещением производят перемещение фиксаторов на величину L₁, причем L₁<L, а перемещение фиксаторов во время поворота производят до момента силового замыкания выступов 5 фиксаторов и детали 1 через ее сечение с упорами 15 приспособления. Такой случай может иметь место, когда требуется более точный угловой останов фиксаторов во время разжима (например, эквидистантные зазоры между поверхностью выступов-впадин фиксатора и ответными поверхностями детали минимальны, что затрудняет съем детали с фиксаторов и диктует точный угловой останов).3. The method of using the claimed device (see Fig. 20, 24) also consists in the fact that before turning the clamps 11 around their axes at an angle

and their movement produce the movement of the clamps by the amount of L ₁ , with L ₁ <L, and the movement of the clamps during rotation is performed until the moment of the force closure of the protrusions 5 of the clamps and the part 1 through its section with the stops 15 of the device. Such a case can occur when a more accurate angular stop of the clamps during expansion is required (for example, the equidistant gaps between the surface of the protrusions-depressions of the clamp and the mating surfaces of the part are minimal, which makes it difficult to remove the part from the clamps and dictates an exact angular stop).

и их перемещением на величину L₂ производят перемещение фиксаторов на величину L₁, причем L₁+L₂<L, а после поворота с одновременным перемещением производят перемещение фиксаторов до момента силового замыкания выступов 5 фиксаторов и детали 1 через ее сечение с упорами 15 приспособления. Такой случай может иметь место, когда требуется более точный угловой останов фиксаторов во время разжима, например эквидистантные зазоры между поверхностью выступов-впадин фиксатора и ответными поверхностями детали минимальны, что затрудняет съем детали с фиксаторов, а также для зажима детали выступами фиксатора перпендикулярно плоскости зажима. Такая реализация способа может быть произведена одним приводом при помощи байонетного паза, имеющего наряду с винтовым участком примыкающие к нему прямолинейные участки пазов, сориентированные по оси фиксатора и соответствующие участкам зажима и разжима.4. The method of using the claimed device (see Fig. 20, 25) also consists in the fact that before turning the clamps 11 around their axes at an angle

and their movement by the amount of L _{2 the} clamps are moved by the amount of L ₁ , moreover, L ₁ + L ₂ <L, and after rotation with simultaneous movement, the clamps are moved until the protrusions 5 of the clamps and the part 1 are force closed through its cross section with the stops 15 of the device . Such a case can occur when a more accurate angular stop of the clamps during expansion is required, for example, the equidistant gaps between the surface of the protrusions of the clamps of the clamp and the mating surfaces of the part are minimal, which makes it difficult to remove the part from the clamps, as well as to clamp the part with the tabs of the clamp perpendicular to the clamp plane. Such an implementation of the method can be carried out by a single drive using a bayonet groove, which has, along with the screw section, rectilinear sections of grooves adjacent to it, oriented along the axis of the clamp and corresponding to the clamping and expanding sections.

5. The method of using the claimed device also lies in the fact that the rotation of the latches 11 around their axes is produced at an angle

In this embodiment, the protrusions 5 of the latch 11 (see Fig. 9, 11, 13, 15, 17, 19) are projected to the maximum on the troughs 6 of the hole of the part 1 with a symmetrical arrangement of the protrusions-troughs relative to their midpoints both in the part itself and on latch.

After processing, all actuators operate in the reverse sequence, and the part is removed from the latches.

The proposed technical solution allows to simplify the design and improve its manufacturability, reduce the complexity of manufacturing and the cost of the site and increase consumer and operational qualities of the product.

Claims (11)

1. A part with one-sided access for fixing with basing, made mainly of sheet and containing elements of basing and fixing in the form of at least two through holes located in one or parallel planes, characterized in that the profile of the holes is a series of identical and symmetrical with respect to their the midpoints of circular radial n protrusions-depressions, the maximum and minimum distances of which to the axis of the hole are located on concentric circles, one of the holes being filled with n≥2, and the other with n≥3, where n = 2, 3, 4, 5 ... is the number of protrusions-troughs from the normal series of numbers. 2. A latch for centering and securing mainly sheet-stamped parts with one-sided access through the base through holes in the fixture, comprising a successively tapered conical surface, an axial displacement limiter, cylindrical coaxial centering surfaces for the part and the base for the fixture, and drive elements for moving it, characterized in that the limiter is made integral with the lock, the limiter profile is made with an equidistant gap relative to the profile of the part’s hole in ide alternating circular radial projections n-troughs, the maximum and minimum distances from the axis of the retainer are located on the circumferences concentrically base surface, the latch is rotatable on the base surface, and d _{2 ^>} d _1d, wherein n≥2,
where n = 2, 3, 4 ... is the number of protrusions-troughs from the normal series of numbers;
d _2f - the diameter of the circle of the protrusions of the retainer;
d _1d - the diameter of the circumference of the depressions of the part. 3. The latch according to claim 2, characterized in that d _1e > d _3f > d _1f ,
where d _1d is the diameter of the inscribed circle of the hollows of the hole in the part;
d _3ph is the diameter of the centering surface of the retainer;
d _1f is the diameter of the inscribed circle of the hollows of the latch. 4. The retainer according to claim 3, characterized in that from each cavity an entry chamfer is made on the centering surface. 5. The latch according to claim 4, characterized in that the shape and dimensions of the protrusions-depressions are the same and symmetrical with respect to their midpoints. 6. A method for centering and securing a predominantly one-way sheet-stamped part having at least two parallel through holes, comprising pre-aligning the axes of the holes with the axes of the fixtures of the device and then moving the part along the axes along the entry cones onto a cylindrical centering surface, characterized in that the part is moved beyond the tabs of the clamps by an amount L, after which they rotate the clamps around their axes by an angle

moreover

where L is the size of the guaranteed clearance between the part and the protrusions of the corresponding latch; m is an arbitrary number 0, 1, 2, 3, 4 - from the normal series of numbers, then the clamps are moved along their axes back to the part moving by the amount L until the moment of locking of the tabs of the clamps and the part through its section with the stops of the device. 7. The method according to claim 6, characterized in that the rotation of the latches around their axes at an angle

and the movement of the clamps by the value of L until the moment of power closure of the planes of the protrusions of the clamps and the part through its cross section with the stops of the device is performed simultaneously. 8. The method according to claim 7, characterized in that the simultaneous rotation of the latches around their axes at an angle

and their movement is carried out by the value of L ₁ , with L ₁ <L, after which the clamps are moved until the planes of the projections of the clamps of the clamps and the part are force closed through its cross section with the stops of the device. 9. The method according to claim 8, characterized in that before the simultaneous rotation of the clamps around their axes at an angle

and their movement produce the movement of the clamps by the amount of L ₁ , with L ₁ <L, and the movement of the clamps during rotation is carried out until the moment of the force closure of the planes of the protrusions of the clamps and the part through its cross section with the stops of the device. 10. The method according to claim 9, characterized in that before the simultaneous rotation of the clamps around their axes at an angle

and by moving them by the value of L ₂ , the clamps are moved by the amount of L ₁ , moreover, L ₁ + L ₂ <L, and after rotation with simultaneous movement, the clamps are moved until the planes of the tabs of the clamps of the clamps and the part are forcefully closed through its section with the stops of the device. 11. The method according to claim 6, characterized in that the rotation of the clamps around their axes is produced at an angle

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