DE2534119C3 - Machine for making tapered shots - Google Patents

Description

The present invention relates to equipment for metal working, more particularly to machines for making tapered shots.

This invention can be used in chemical and petroleum engineering as well as in other branches of machine and apparatus construction, where conical apparatus and Apparatus floors must be produced, as well as in agriculture for the production of feed storage systems be used.

Most advantageously, this invention can be used for making tapered shots, which have a relatively small wall thickness, d. H. at the ratio of the wall thickness to the smaller diameter of the truncated cone of the shot does not exceed 0.045.

At present, three roll bending machines are well known in the art for making tapered shots used. The blank here has the shape of an annular sector. There is one in these machines Roller (usually top roller) arranged at an angle to two other rollers in order to reduce the radius of the The blank has a smaller bending radius, but a larger bending radius is obtained. However correct, since the rollers are cylindrical and the blank has the shape of an annular sector, the The speeds of the respective sections of the blank and of the rollers do not always coincide, i.e. H. it the slipping of the blank takes place. This leads to heavy wear of the rollers and tilting of the Blank in the plane that is perpendicular to the plane of rotation of the roller, whereby at the end of the Bending process radial edges of the blank are offset relative to one another. Bringing the Blank edging is done by straightening the blank, which has a negative impact on the quality of the finished shot affects.

In some cases the rollers are tapered. Again, they can only be used to manufacture of tapered shots are used, in which the taper angle corresponds to the taper angle of the rollers corresponds to, d. H. the technological possibilities of this machine are very limited.

In addition, special devices are required in the roller machines to support the blank, which are arranged on both sides of the machine on the front sides of the rollers. This is especially necessary for thin-walled blanks. The use of the rolling machines is only for manufacturing of tapered shots with a point angle of a maximum of 120 ° is possible.

Presses have also found widespread use for the production of tapered sections. However, for Production of shots with a point angle over 90 ° requires pressing, which is a relatively large one

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Movement of the punch along the cone axis occurs when producing shots with a point angle under 90 "special multiple dies are required, which also reduces the technological possibilities of the press, because there is an appropriate one for each type size of the wefts Tool must be used.

Also known is a machine for producing tapered sections by rounding sheet metal blanks in the form of an annular sector, which has a support body on this at one end practically at one point attached two clamps for clamping the radial edges of the blank, from at least one of which can be rotated with respect to its attachment point in the plane that is parallel to the frame, is arranged for displacement against the other clamp, and contains a plunger, which is below the blank on the bisector of the angle of its sector to the blank plane vertically displaceable This machine is arranged only for the production of shots from blanks with a sector angle used over 180 °.

In the known machine, the clamps are usually attached to a faceplate. Here one clamp is rigidly attached to this, while the other is rotatable over the faceplate with respect to the Attachment point of the faceplate is arranged on the first clamp. At the beginning of the Rounding of a shot acts on it after it is clamped in the clamps of the radial blank edges a plunger that generates a force for guiding the blank out of the stable flat state, the is directed perpendicular to the blank plane. At the same time, the faceplate is turned with clamps attached to it rotated the fastening point of the clamps against the immovable clamp. At the end of the Rounding the shot, the two clamps are practically on a line, which is a continuation of the Represents bisecting the angle of the reed sector. I. E. the blank is rounded using the Merging of the clamps and thus the radial edges of the blank.

The known machine has a considerably higher performance than a roller machine or press. In addition, the blank does not come into contact with the parts of the machine during rounding, which is possible Excludes damage to its surface.

The main disadvantage of this machine, however, is its limited technological possibilities, which can only produce ^{shots from blanks with a sector angle above 180 c.} In addition, equipment that has a rotating faceplate, such as a carousel machine, is required for the arrangement of clamps. The size of the faceplate determines the maximum length of the surface line of the conical section. This creates difficulties in making large shots.

The present invention is based on the object of a machine for producing conical To create shots in the construction of the ferrules and their fastening in the machine it would allow shots to be rounded from blanks with practically any angle of development.

This task is performed in the machine for producing tapered sections by rounding sheet metal blanks solved in the form of an annular sector, which has a support body on this at one end practically at one point two clamps attached to the Clamping radial edges of the blank, at least one of which is rotatable with respect to its point of attachment in a plane that is parallel to the support body, to move the same against other ferrule is arranged, as well as contains a plunger, which is located under the blank on the bisector of the Angle of its sector is mounted displaceably perpendicular to the blank plane, in the invention each clamp on the support body around its geometric

ίο The longitudinal axis is rotatably arranged, including at their Ends joints are attached, one of which is located in the attachment point of the clamp, the one Has device for fixing the same against rotation, wherein the plunger is arranged such that it from. the zone where the clamps come together.

This construction of the machine allows tapered shots from blanks with a sector angle under 180 °. When fixing the clamps against rotation around their own geometric axis shots from blanks with a sector angle of more than 180 ° can be rounded. In this way it allows the proposed machine to produce wefts with practically any cone ratio.

Expediently, the joint that is located at the end of the opposite to the attachment point Ferrule is attached to a carriage, for its displacement on the support body a circular Guide is arranged.

The use of the car makes it possible to move the two clamps against each other and at the same time thereby reducing the production time of a shot.

In one of the variants of the invention

J5, each clamp has a mechanism for forcibly rotating the same around its geometrical one Longitudinal axis at the beginning of the rounding of the blank, which is attached and coaxially with the clamp rigidly connected rotating hydraulic

w represents cylinder.

This allows the rounding of shots from blanks with an angular sector below 180 ° To overcome resistance of the blank material, which counteracts the rotation of the clamps about their axes, and to avoid bending the edges of the blank to the side that corresponds to the direction of displacement of the Ferrule carriage is opposite over the guide.

In another embodiment of the invention, the ends of the clamps are at their attachment point are opposite, perpendicular to their geometrical longitudinal axis mirror-symmetrically relative to one another Cams attached to the profile of each of which have a rectilinear section and one with it conjugate rounded section, where the length of the rectilinear section and the radius of the rounded section are approximately equal to the clamp height.

The presence of these cams makes it easier to turn the clamps around their axis to the position

do the in the at the end of the rounding of the shot The edges of the blank can be adjusted and butt-connected.

Appropriately, the plunger is also arranged on a floor truck that runs along the bisector of the

h 'angle of the blank sector is displaceable.

This arrangement of the plunger allows it to be moved out of the zone where the ferrules come together and to regulate its position according to the blank size.

Another embodiment of the invention is that each joint that is in the attachment point the clamps on the support body, has its own support, while the joint on opposite end thereof mounted on the carriage so as to be radially displaceable with respect to the circular guide is.

This fastening of the clamps allows this unit to be carried out very easily and the joints in the in close proximity to each other. However, in this arrangement of the joints there are compensatory shifts the opposite end of the ferrule to the joints mentioned is required. Therefore the corresponding clamp joints on the carriage are in relation to it in the direction of the circular Guide mounted radially displaceable direction.

Another embodiment of the invention consists in the attachment to the side surfaces of the Floor car of pivotable levers in the horizontal plane to support the on this arranged blank.

This construction of the floor truck allows it to bring the radial blank edges to the Force to use.

The circular guide is expediently located in a recess in the floor and lies in the same height with this one.

This ensures unhindered movement of the floor trolley while the machine is working.

When the machine is used to produce wefts from blanks with a sector angle greater than 180 ° the clamps are fixed against turning around their own axis. Here you are in a such a position that the gap into which the blank edges are introduced comes to lie higher than it is with Clamping the blank with a sector angle below 180 ° is the case Section of the frame, which is opposite to the point of assembly of the clamps, a ramp executed.

Below is a concrete embodiment of the invention with reference to the drawings cited; in the drawings shows

F i g. 1 machine for the production of tapered sections according to the invention, plan view;

F i g. 2 Section according to H-II in F i g. 1;

F i g. 3 Section according to III-III in F i g. 2;

F i g. 4 Section according to IV-IV in F i g. 1;

Fig. 5 Position of the wagons at the moment of merging of compulsions;

F i g. 6 Section according to VI-VI in F i g. 2;

F i g. 7 section according to VII-VII in FIG. 2;

F i g. 8 section according to VII-VIII in FIG. 7;

9 floor car, side view;

Fig. 10 machine for the production of conical Shots at the moment of completing the rounding, plan view;

F i g. 11 - the same as in FIG. 10, view according to arrow B.

The proposed machine is to round conical shots from sheet metal blanks in the form of an annular sector to determined includes a supporting body 1 (F i g. \\ are mounted on the two clamps 2, a blank intended 3 for clamping the radial edges. The ends of the clamps 2 with the same name are attached to the support body 1 at approximately one and the same point

each ferrule 2 represents two bars 4 and 5 parallel to one another, the distance between them being sufficient to insert them into the edges of the blank 3. The ends of the bars 4 and 5 are rigidly connected to one another on the side opposite the fastening point of the clamps 2 on the support body 1. To clamp the edges of the blank 3, each clamp 2 has a number of hydraulic clamping means 6 arranged along its geometric longitudinal axis. As shown in FIG. 2, each clamp 2 assumes a position before the start of work in which one bar 4 is located above the other bar 5 which represents the support beam The beam 5 here represents a console.

Each clamp 2 has ball joints 1 and 8 (FIG. I) at its ends, the centers of which lie on its geometrical longitudinal axis and which serve to rotate the clamp 2 about this axis. The joint 7 is designed as a whole with an axis 8a, which is located along the geometrical longitudinal axis of the clamp 2 and is rigidly connected to it. The joints 7 are located at the fastening point of the clamps 2 on the support body 1. At its point, each of the joints 7 has its own support. Because the systems of the joints 7 must be located at a minimum possible distance from one another, in the present example they practically represent recesses for accommodating the joints 7, which are embodied in a stand 9 which is located on the support body 1 approximately at the intersection of the geometric longitudinal axes of the Clamps 2 is arranged. The stand 9 is designed such that it can be dismantled in the plane of the geometrical longitudinal axes of the clamps 2.

The joint 8 of each clamp 3 is mounted in a carriage lü, which is used to rotate the clamp 2 with respect to their attachment point on the support body 1 in a plane parallel to this during work the machine serves. The machine has a circular guide 11 for moving the carriage 10 (Fig. 1), the center of which is at the same distance from the centers of the joints 7, which the Distance between the centers of the same is the same.

The carriage 10 has a housing 12 (Figure 3), which is formed by two vertical side walls 13 and 14 (FIG. 4) which are connected to one another by ribs 15 are. In the lower (according to the drawing) part of each of the side walls 13 and 14, two rows lie one above the other of rollers 16 and 17 (Fig. 3), which comprise the (in the drawing) upper flange of the guide 11, which in the Cross-section has the shape of a double-T profile The rollers 16 of the upper row (in the drawing) have collars to prevent the guide 11 from being pushed transverse displacement of the carriage 10. In the side walls 13 and 14 of the carriage 10 are through a Sleeve 18 (Fig. 4) connected through holes executed. The sleeve 18 is perpendicular to the Side walls 13 and 14 arranged, and in their bore is a dismountable in a diametrical plane Slider 19 housed in which a recess for accommodating the joint 8 is carried out Slider 19 ensures the possibility of radial displacement of the joint 8 relative to the circular Guide 11 (Fig. 1) in the movement of the carriage 10 The necessity of this shift is thereby requires that the centers of the joints 7, i.e. the

Attachment points of the clamps 2 on the support body 1, with each other and consequently with the center of the circular guide 11 do not coincide.

Each clamp 2 has a device for fixing it after rotation with respect to its geometric shape Longitudinal axis.

This device constitutes a bar 20 (Figure 3) which is rigidly attached to the end of the axis Sa , which protrudes beyond the limits of the housing 12 of the carriage 10, two stops 2i and 22 which are attached to the outside of the side wall 14, as well as a pawl 23. The pawl 23 represents a lever 24 which is arranged pivotably with respect to an axis 25 which is perpendicular to the wall 14. The end of the lever 24, which is right (in the drawing) «; from the axis 25 is cushioned with the aid of a spring 26 attached to the side wall 14. Here, the lever 24 lies on a horizontal straight line with the stop 22. Since during the production of the shots from the blanks with a development angle of less than 180 °, a moment occurs that counteracts the rotation of the clamps 2 with respect to their geometric longitudinal axes, so each of the clamps has 2 shows a mechanism for forcibly rotating the same. In the present example, this mechanism represents a rotating hydraulic cylinder 27 (FIG. 4) which has a housing 28 in which a blade 30 rigidly attached to a hollow shaft 29 is accommodated. Another blade 31 is rigidly attached to the inner surface of the housing 28. The hollow shaft 29 is coaxial with the axis 8a and is rigidly connected to it. A fork 32 made in one piece with it abuts the housing 28. which comprises a rod 33 which lies parallel to the axis Sa below this and is rigidly connected to the housing 12 of the carriage 10. The vanes 30 and 31 divide the interior of the housing 28 of the hydraulic cylinder 27 into two cavities C and D (FIG. 5), each of which is connected to a pressure fluid source (not shown)

To move the carriage 10 on the guide 11 * o and rotation of the clamps 2 with the carriages against each other, each carriage 10 (Fig. 3) has one Drive attached to the housing 12 of the carriage 10. The drive consists of an electric motor 34 with a brake (not shown) and a gearbox * 5 35, the output shaft is arranged vertically and carries a gear 36 at its end, which with a Rack 37 which is attached to the guide 11 engages

Since in the final moment of the rounding of the shot from a blank with a development angle of less than 180 ° its radial edges must be brought together very precisely, it is necessary that at this moment the clamps 2 assume a position in which the longitudinal axes of the two bars 4 and 5, which form a clamp 2, lie in the vertical plane which is parallel to the same plane that passes through the longitudinal axes of the two bars 4 and 5 of the second clamp 2 Cams 38 (Fig.6) attached The profile plane of the cam 38 is perpendicular to the geometric longitudinal axis of the clamp Z. The profile of each cam 38 is formed by a straight section 39 and a rounded section 40 in such a way that in the final moment of the weft rounding the straight sections of the profiles of the two cams 38 come to stand vertically and come into contact over their entire length, while their rounded Abs Sections come to lie mirror-symmetrically with respect to one another, as shown in FIG. 5 is shown. The length of the straight section 39 of the profile of the cam 38 is selected to be approximately equal to the height of the clamp 2.

The radius of the rounded portion 40 is also approximately the same as the height of the clamp 2, and his The center is eccentric with respect to the geometrical longitudinal axis of the clamp 2. In the present example, it must the height of the clamp 2 is understood to mean the distance that is in the vertical between the geometric Longitudinal axis of the clamp 2 (Fig. 6) and the lower end point of the beam 5 is measured.

Hydraulic clamping means 6 (FIG. 2) are provided for clamping the blank 3 in the clamps 2. Each Clamping means 6 represents a hydraulic cylinder built into the beam 4 (FIG. 6), the piston 41 of which is in is made in one piece with a piston rod 42. The end of the piston rod 42 protrudes above the surface of the beam 4 facing the beam 5, d. H. the piston rods 42 of the hydraulic cylinders are used to press the blank 3 against the (in the drawing) lower bar 5. The when clamping the Blank 3 of the bracket 5 of the clamp 2 experiences a considerable bending moment, is to relieve of the same and to increase the strength with the same cross-sectional size of this beam, a cylindrical rod

43 (Fig. 7) is provided with radial projections at its ends. To accommodate the rod 43 are in the bars 4 and 5 of the clamp 2 executed through holes, on the surface of which longitudinal grooves 45 (Fig. 8) for the passage of the mentioned projections

44 are carried out on the rod 43. The distance measured along the length of the rod 43 (FIG. 7) between the Projections 44 is the sum of the heights of beams 4 and 5 and the gap between them at the Attachment point of the rod 43 the same.

At the beginning of the round of the weft, the flat blank 3 must be brought out of the stable state i.e. a force perpendicular to the plane of the blank must act on the blank whose The point of application lies on the bisector of the angle of the blank sector.

For this purpose, the machine has a ram 46 (FIG. 1), which represents a hydraulic telescopic jack. in the In the present example, the ram 46 is arranged on a floor truck 47 which has a horizontal platform 48 (Fig.9) has a slider 49 is rigidly connected to the support body of the jack, for its accommodation in the platform 48 of the floor vehicle 47 a groove 50 is carried out along the The direction of movement of the floor trolley 47 while the machine is working is in the slider 49 is parallel to the groove 50 a horizontal threaded hole is carried out, in which one arranged in the floor carriage 47 Threaded screw 51 is housed, which has a handwheel 52 at its end. Thus, the plunger 46 is on the Floor carriage 47 along the bisector of the sector angle of the blank 3 is also slidably attached the floor trolley 47 can also move in this direction, including its platform 48 on wheels 53 The floor truck 47 has a drive consisting of an electric motor 54 with a brake (not also shown) and a transmission 55, the output shaft of which with an axis 56 of the in the Direction of movement of the floor car 47 front pair of wheels 53 is mechanically connected to the control of the floor car 47 is the right one (in the drawing)

Pair of wheels 53 designed to be rotatable in the horizontal plane.

On the side surfaces of the platform 48 of the floor vehicle 47 are pivotable in the horizontal plane Lever 57 attached, whose pivot axes 58 {Fig. 1) are in cantilever pieces 59 that are attached to the platform 48 are rigidly attached.

The levers 57 are used to support the blank 3, which is on the platform 48 of the floor truck 47 for Introduction of the radial edges of the blank 3 in the ferrules 2 is arranged. For free displacement of the floor car 47 during this introduction, the circular guide 11 (FIG. 2) is in a recess of the floor and is at the same height as this.

The proposed machine is also used for rounding tapered shots from blanks 60 (FIG. 1) suitable for a development angle greater than 180 °. These blanks 60 are in the clamps 2 from the side introduced, which is opposite to the point of merging thereof. Here, the same floor truck 47 used, but since the console bars 5 of the clamps 2 are above the support bars 4 when rounding such shots, the blank 60 must be higher than the blank 3. That is why it is in the section of the support body 1, which is opposite to the merging point of the clamps 2, a ramp 61 for the Floor car 47 executed.

The work of the proposed machine is illustrated below using the example of rounding a shot viewed from a blank with a development angle of less than 180 °. In the starting position before the Start of work are the levers 57, which are attached to the platform 48 of the floor truck 47, in the horizontal Level pivoted so that they, together with the platform 48, the support for the arranged on them Represent blank 3. The plunger 46 is here at the same height with the platform 48 and is with the help of Screw 51 in the groove 50 of the platform 48 approximately opposite the center of the radius of the Blank 3 arranged. The floor carriage 47 is located outside the circular guide 11. The clamps 2 are drawn apart relative to one another by an angle which is equal to the sector angle of the blank 3, and are symmetrical with respect to the bisector of the sector angle of the blank 3. Each ferrule 2 is like this set that the support beam 4 is under the console beam 5, the axes of the hydraulic cylinders Clamping means 6 are vertical and their piston rods 42 assume the upper end position. Bars 4 and 5 each ferrule 2 are connected by the rod 43.

The machine works as follows:

The electric motor 54, which is arranged on the floor truck 47 and is driven via the gearbox 55 and the axle 56 sets the front pair of wheels 53 in motion. The floor truck is shifted 47 together with the blank 3 in the direction of the clamps 2. The displacement of the floor car 47 with the blank 3 lasts until the radial edges of the blank 3 into the gaps between the bars 4 and 5 each ferrule 2 are registered and have taken a position in which they are beyond the limits of the Force 2 protrude. The distance from the edge of the blank 3 to the geometric longitudinal axis of the respective clamp 2 should be equal to half the distance between the centers of the joints 7, which the Represent the fastening points of the clamps 2. After inserting the radial edges of the blank 3 into the Forces 2, the blank wheels are clamped with the aid of the clamping means 6. For this purpose, the hydraulic fluid the cylinder chambers on the cover side of the hydraulic cylinders of the clamping means 6, and the pistons 41 with the piston rods 42 move downwards, whereby they push the blank 3 against the beams 5 press on. After the blank 3 has been clamped in the clamps 2, pressure fluid is simultaneously the hydraulic jack of the ram 46 and the cylinder chambers C of the rotating hydraulic cylinders

to linder 27 and the drives of the floor wagons 10 are switched on. As a result of this, the plunger 46 moves upwards, lifting the center of the blank 3, bringing it out of the flat, stable state and specifying the direction of displacement as it rounds for a shot. At the same time, as a result of the rotary movement of the toothed wheel 36, which is in engagement with the rack 37 of the guide 11, the carriages 10 move against one another thereon, whereby the clamps 2 are rotated with respect to the centers of the joints 7, which represent the fastening points of the clamps 2. When the pressure fluid is supplied to the cylinder chambers C, the hydraulic cylinder 27 rotates! the shovel 30 of each hydraulic cylinder 27 together with the hollow shaft 29, which is rigidly connected to the axis 8a of the clamp 2. In the FoIpc of this, the clamps 2 are rotated relative to one another with respect to their geometric longitudinal axes and round off the blank 3. After the blank 3 has been moved out of the flat, stable state and has assumed the shape of an arc, the floor carriage 47 with the ram 46 is moved out of the area of the circular guide 11. The clamps 2 then move against one another, thereby rounding the blank 3, until the radial edges of the blank 3 merge, ie until a finished shot is produced. During the rounding of the blank 3, the supply of pressure fluid to the cylinder chambers C of the hydraulic cylinders 27 continues until each clamp 2 has rotated 90 ° with respect to its initial position with respect to its geometric longitudinal axis, after which the supply of pressure fluid to the cylinders 27 is stopped and further rotation of the clamps 2 about their own longitudinal axes under the action of the elastic forces of the material of the blank 3 occurs Rigidly connected axis 8a and the hydraulic cylinder 27 fastened on this a radial displacement with respect to the circular guide 11 relative to the housing 12 of the carriage 10. Here, the fork 31 of the housing 28 of the hydraulic cylinder 27 slides along the rod 33, which is rigidly connected to the wall 14 of the housing 12 of the carriage 10 Forcing 2 to be spaced apart and not coinciding with the center of the circular guide.

At the end of the rounding of the blank 3, after turning the clamps 2, start to make their own geometric Axis at an angle over 90 ° with respect to the starting position which is mirror-symmetrical on them attached to each other cams 38, each other in one of the points of the rounded portions 40 of their Contact profiles. This leads to the fact that with further movement of the carriage 10 on the circular

It guides the ferrule 2 the profiles of the cams 38 itself roll on each other and turn the clamps 2 around their longitudinal axes until the straight ones Sections 39 of the profiles of the cams 38 come to stand vertically and over their entire length start contacting as shown in Fig. 5 is shown. This mutual position of the cams 38 e.iüpricht the Position of the clamps 2, in which the longitudinal axes of the two bars 4 and 5, which form a clamp 2, in the vertical plane, which are exactly the same The plane that passes through the longitudinal axes of the bars 4 and 5 of the second clamp 2 is parallel

Before the end of the rounding of the blank 3 presses as a result of the rotation of each clamp 2 about its geometriSi.ne longitudinal axis, the rigidly attached bar 20 of the device for fixing the clamp 2 with its end on the end of the lever 24 of the pawl 23, whereby the The spring 2β is compressed and the lever 24 is pivoted about the axis 25. At the end of the rounding of the blank 3, the bar 20, which rotates together with the clamp 2, assumes a vertical position and rests against the stop 22. Here, the lever 24 is released and is pivoted about the axis 25 under the action of the spring 26, whereby it assumes a horizontal position and thereby fixes the bar 20 and consequently the clamp 2 against rotation about its own axis. After the completion of the rounding of the blank 3, the electric motors 34 of the carriages 10 are switched off and the carriages 10 are braked to avoid any arbitrary displacement of the same along the guide U. The position of the clamps 2 and the finished shot at this moment is shown in FIGS. 10 and II. Thereafter, the radial edges of the blank 3 are welded according to any method suitable for each specific case Tensioning means 6 is prevented and they are connected to the drain while pressure fluid is supplied to the crank-side cylinder spaces. As a result, the pistons 41 move with the piston rods 42 (Fig. 11) upwards and give the sh ·.:? free. Thereafter, the rods are rotated 43 about their own axes to Ziirn collapse of their projections 44 with the grooves 45, they are taken out <t ~ s the holes in the Baiken 4 and 5, the ferrule 2, and the weft is made of the ferrule 2 by means of any hoist removed

! 0 men.

In the proposed machine the rounding of the shots from the blanks is with a sector angle provided over 180 °. In principle, the work of the machine does not differ from the above except for some moments described below. The floor car 47 is on the Ramp 61 is set up, and on its platform 48 is the blank 60 is arranged. As in the case described above, the clamps 2 are symmetrical arranged with respect to the bisector of the sector angle of the blank 3. Here every clamp 2 with Using the rotating hydraulic cylinder 27 adjusted so that the console beam 5 above the support beam 4, and fixed in this position with the aid of the pawl 23. The clamping of the blank 3 in the clamps 2, leading the same out of the flat stable state, the displacement of the carriage 10 over the Guide U, the rotation of the clamps 2 with respect to the centers of the joints 7 and all subsequent ones Operations are the same as described above. However, during the entire round of the Shot the clamps 2 fixed against rotation about their own geometric longitudinal axis. Besides, he needs Floor car 47 does not necessarily have to be driven off ramp 61, since it is outside the zone remains where the displacement and merging of the clamps 2 takes place.

In this way the proposed machine is for the production of tapered shots from developments with practically any sector angle of the blank, d. H. for making shots with any Cone angle determined

In addition 7 sheets of drawings

Claims (9)

Patent claims: 1. Machine for the production of tapered sections by rounding sheet metal blanks in Shape of an annular sector, which has a support body with on this at one end practically in a common point attached two clamps for clamping radial Blank edges, at least one of which can be rotated with respect to its fastening point in a plane, which is parallel to the support body, arranged to move the same against the other clamp is, as well as a plunger, which is under the blank on the bisector of the angle of its Sector mounted so that it can be displaced perpendicular to the plane of the blank is characterized by that each clamp (2) is rotatably arranged on the support body (1) about its own geometric longitudinal axis is, for which joints (7, 8) are attached at their ends, one of which is in the attachment point the clamp (2) is located, which is a device for fixing the same against rotation has, wherein the plunger (46) is arranged such that it moves out of the zone of merging of the Force (2) can lead out 2. Machine according to claim 1, characterized in that the joint (8) which is located on the for Attachment point opposite end of the clamp (2) is attached to a carriage (10) is, for its displacement on the support body (1) a circular guide (It) is arranged. 3. Machine according to claim 1, characterized in that each clamp (2) has a mechanism for the compulsory rotation of the same around its own geometric longitudinal axis at the beginning of the Rounding of the blank (3) possesses, which is arranged coaxially with the clamp (2) and is rigid with it represents connected rotating hydraulic cylinder (27). 4. Machine according to claim 1, characterized in that at the ends of the clamps (2), the their attachment point are opposite, perpendicular to the geometric longitudinal axis of the same mirror-symmetrically to each other cams (38) are attached, the profile of each of which one has a straight section (39) and a rounded section (40) conjugated with it, wherein the length of the straight section (39) and the radius of the rounded section (40) are approximately the same as the height of the clamp (2). 5. Machine according to claim 1, characterized in that the ram (46) on a floor car (47) is arranged displaceably along the bisector of the angle of the blank sector. 6. Machine according to claim 2, characterized in that each joint (7) which is in The fastening point of the clamps (2) is on the support body, has its own support, while the hinge (8) at the opposite end thereof on the carriage (10) with respect to the circular Guide (H) is attached radially displaceable. 7. Machine according to claim 5, characterized in that the floor carriage (47) in its Lever (57) pivotable in the horizontal plane to support the on the carriage arranged blank (3) has. 8. machine according to claim 2, characterized draws that the circular guide (11) in a The recess is housed in the floor and is at the same height as this 9. Machine according to claim 7, characterized in that in the section of the support body (1) which is opposite to the merging point of the clamps (2) is a ramp (61) for the Floor car (47) is designed for the case that a blank (60) with a on the floor car Sector angle is arranged over 180 °.