RU2445181C2 - Method and device for production of hollow body from round billet - Google Patents

Method and device for production of hollow body from round billet Download PDF

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Publication number
RU2445181C2
RU2445181C2 RU2009105676/02A RU2009105676A RU2445181C2 RU 2445181 C2 RU2445181 C2 RU 2445181C2 RU 2009105676/02 A RU2009105676/02 A RU 2009105676/02A RU 2009105676 A RU2009105676 A RU 2009105676A RU 2445181 C2 RU2445181 C2 RU 2445181C2
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Russia
Prior art keywords
workpiece
mandrel
pressing
matrix
deep
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RU2009105676/02A
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Russian (ru)
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RU2009105676A (en
Inventor
Вернер ХЮТТЕР (DE)
Вернер ХЮТТЕР
Бенедикт НИЛЛИС (DE)
Бенедикт НИЛЛИС
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Лайфельд Металь Шпиннинг Гмбх
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Priority to DE200610039656 priority Critical patent/DE102006039656B4/en
Priority to DE102006039656.1 priority
Application filed by Лайфельд Металь Шпиннинг Гмбх filed Critical Лайфельд Металь Шпиннинг Гмбх
Publication of RU2009105676A publication Critical patent/RU2009105676A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00Making hollow objects
    • B21D51/16Making hollow objects characterised by the use of the objects
    • B21D51/24Making hollow objects characterised by the use of the objects high-pressure containers, e.g. boilers, bottles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14Spinning
    • B21D22/16Spinning over shaping mandrels or formers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D35/00Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00

Abstract

FIELD: process engineering.
SUBSTANCE: invention relates to metal forming, particularly, to production of hollows body from round billet by rotary extrusion or drawing. Proposed device comprises revolving mandrel, revolving axially moving pressure element arranged on machine tool and, at least, one reeling roller to be fed axially and/or radially to aforesaid mandrel. Said pressure element accommodates, at least, one female die for mandrel to enter for forming machine part moving axially relative to pressure element. Proposed method comprises forming cylindrical outer surface of revolving billet by feeding, at least, one reeling roller, deep drawing or extruding central section of machine part. Hollow body base section is formed and fed axially into female die for extruding.
EFFECT: higher strength of hollow body.
15 cl, 46 dwg

Description

FIELD OF THE INVENTION

The invention relates to a device for manufacturing a hollow body from a workpiece in the form of a round billet, in particular a lathe-pressing machine and / or (rolling) rotary drawing machine, comprising a (pressing) mandrel arranged to rotate around the axis of rotation, a clamping element, located with the possibility of rotation around the axis of rotation and with the possibility of movement in the axial direction relative to the mandrel for pressing the workpiece, and at least one obkatny (pressure) roller, made with the possibility of its supply to the mandrel in the axial and / or radial direction.

In addition, the invention relates to a method for manufacturing a hollow body from a workpiece in the form of a round billet.

State of the art

Hollow bodies of this kind can be used, for example, as pressure vessels. Pressure vessels, which must withstand an internal pressure of several hundred bar, are used for compressible or liquefied gases, such as compressed natural gas, liquefied natural gas or high-pressure hydrogen gas. Pressure vessels are used, for example, in commercial vehicles as pressure cylinders for tanks with natural gas, as well as for supplying hydrogen to fuel cells.

The prior art various methods and devices for the manufacture of pressure vessels.

For example, DE 2517971 discloses the manufacture of gas cylinders from ingots. This ingot is perforated in a press in such a way that the base section remains stationary and, thus, the workpiece is deformed into a hollow cylinder having a base on one side. Then the specified hollow cylinder is molded into a blank for a gas cylinder and subsequently subjected to a cold drawing process in the final form on a rolling machine.

DE 3910192 A1 proposes the formation of a closed vessel from pipe sections obtained by cutting hot-rolled pipes into segments using hot pressure treatment (hot forming). When the base is formed in the center of the base, a nose is formed on its inner side, which is removed mechanically using an additional operation. It is further contemplated that the wall thickness of the middle cylindrical portion is thinned by cold forming. Since with this method various operations should, as a rule, be carried out at various processing plants, this known method can also be quite laborious.

DE 197 11 844 B4 discloses yet another method for manufacturing pressure vessels. In accordance with this method, the corresponding boiler-like part is made from two round billets by rotational drawing, after which the boiler-like parts are welded together to form a vessel. The welding process can have a negative effect on the strength and corrosion characteristics of the material.

From DE 1652630 C a method for manufacturing boilers for cooking with a cylindrical wall is known. This method provides that the edges of the round billet are first formed into a cylinder by rotational drawing, after which they are stretched.

As the closest analogue of the present invention can be considered the solution disclosed in the source (Gredor MA Pressing and rotational extrusion. M: Mechanical Engineering, 1971). This source describes the formation of a base section in a round billet, carried out, for example, by deep drawing, as well as the formation of a cylindrical wall section by, for example, rotational drawing or rotational extrusion. In particular, the central part of the bottom is stamped with a matrix located on the plunger of the pressure cylinder of the pressure-rolling machine. Then, when the workpiece is rotated, sandwiched between the die and the punch, with a stationary side board and movable pressure rolls, the bottom side is run-in. The final molding of the spherical part of the bottom is carried out during the run-in under the combined action of the efforts of the hydraulic clamp cylinder and pressure roll.

Disclosure of invention

An object of the present invention is to provide an apparatus and method for manufacturing a hollow body, in particular a pressure vessel, from a workpiece in the form of a round billet, with which particularly strong and airtight hollow bodies can be manufactured in a simple and economical manner.

In accordance with the present invention, this goal is achieved using a device having the distinguishing features according to claim 1, as well as a method having the distinguishing features according to claim 5. In the respective dependent claims, preferred embodiments are indicated.

Proposed in accordance with the present invention, the device is characterized in that at least one matrix is arranged on the clamping member, adapted to move in the axial direction relative to the mandrel for forming the workpiece, and in that the matrix can be moved in the axial direction relative to the clamping element.

The first fundamental idea of the invention is that a die is placed on a turning and / or rotary drawing machine in such a way that, by axial movement of the die and / or mandrel, the workpiece can be drawn into the die and thereby be formed. This allows forming the workpiece clamped in the machine for one of its fastening in the machine (with the same fastening) with performing both deep drawing or pressing operations and rotational extrusion and / or rotational drawing operations. For example, by deep drawing or pressing in the matrix, a section of the base of the hollow body can be formed, and by subsequent rotational drawing, a cylindrical section of the wall and / or neck of the hollow body can be finally formed.

Another fundamental idea of the invention is that the matrix is made on the clamping element with the possibility of movement in the axial direction. This allows, after deep drawing or pressing operations, to retract the matrix back from the end surface of the pressing element, as well as the workpiece so that the matrix does not interfere with the supply of at least one obkatny roller. As a result of this, including those parts of the workpiece that have been pre-molded by deep drawing or pressing, can be further processed using rotational extrusion or rotational drawing without having to re-clamp the workpiece in a laborious way.

Thus, the device according to the invention makes it possible to manufacture a hollow body in a simpler, faster and, therefore, economical way. Compared to other pressure treatment methods, some of the operations can be reduced, such as intermediate annealing and mandatory etching, as well as phosphating to remove scale.

Compared with the method of manufacturing from pipes, the method proposed in accordance with the invention is much cheaper. In addition, the flat sheet metal required as a raw material can be not only purchased at a lower price, but also a large selection of sheet metal thicknesses is available. There is no restriction on the diameter of the vessel if it depends on the proposed pipe diameters. According to the proposed method, any relationships between the diameter and wall thickness of the vessel can be selected, and thus a high degree of flexibility can be provided. For individual parts of the vessel, the wall thickness can also be freely adjusted. Compared to hot forging by the forging method, the proposed method is associated with significantly lower investment costs. Unlike technology requiring the use of forging dies, the proposed device can be applied with a high degree of flexibility for a wide variety of machined parts.

For best use, the matrix annularly covers the clamping element. Advantageously, the matrix has an inner contour that narrows as the axial distance from the extended mandrel increases. The clamping element is preferably located at the top (narrowest point) of the inner contour of the matrix. Depending on the desired shape of the base of the hollow body, the clamping element may have, for example, a convex, concave or flat end surface.

The matrix can preferably be moved in such a way that when it is in the working position, it protrudes in the axial direction from the end surface of the clamping element directed to the mandrel, and in the retracted position, it is shifted back along the axis relative to this end surface. For best use, when the die is in the molding position, the contour of the end surface of the clamping element is completely adjacent to the inner contour of the matrix.

The versatility and processing speed of the proposed device can be increased by placing in the mandrel and / or in the clamping element of the punch, which for the molding operation can be extended from the side, respectively, of the mandrel or clamping element. Such a punch can be used, for example, to form the neck of a vessel. The punch can preferably move in the axial direction, i.e. in the direction of the axis of rotation, and, for best use, the axis of rotation passes through the center through the punch.

The versatility of the proposed device can be further increased due to the fact that the matrix consists of several matrix elements that can move relative to each other in the axial direction. As a result of this, it is possible to sequentially perform several different pressure treatment operations for one part fixing. For best use, the matrix elements are arranged coaxially and / or annularly surround each other.

In the proposed method for manufacturing a hollow body from a workpiece in the form of a round billet, it is provided that the base portion of the hollow body is obtained by deep drawing or pressing the central portion of the workpiece, and the outer portion of the workpiece that is rotated is given a cylindrical shape, in particular, by the method rotary hood by feeding at least one obkatnogo roller. In this case, a conical or funnel-shaped intermediate preform can be made first. This intermediate preform is then molded into a cylindrical shape in one or more operations.

The method can be carried out, in particular, using the device in accordance with the present invention, while all the relevant advantages described above can be achieved.

Another fundamental idea of the invention is that for the manufacture of a hollow body, the workpiece in the form of a round billet is first processed in its center by feeding the part inside the matrix. The outer portion of the workpiece may not be molded, or may, for example, be molded into an intermediate preform, preferably in the form of a truncated cone. During subsequent processing by the method of rotational extrusion or rotational drawing, the outer section is then formed into a cylindrical shape.

The proposed method allows the manufacture of hollow articles, in particular pressure vessels, having a particularly low weight, high strength and minimal pollution of the inner surface of the vessel, in a particularly energy-saving and economical manner.

The economy of the proposed method consists, inter alia, in the use of round billets with high surface quality and minimum tolerances, available at a low price and with a wide choice of thicknesses with a small thickness variation step.

The deep drawing or pressing according to the invention may consist of one or more molding operations. In accordance with the invention, these operations can be carried out both with a stationary part, and, preferably, with the rotation of the workpiece.

The processing speed of the proposed method can be further increased due to the fact that deep drawing or pressing of the Central section and running in the outer section are carried out for one fixing part. For this, for the purpose of best use, a lathe and / or rotary hood machine is used, in which the matrix is placed in front of the mandrel from the side of its end. In this case, it is preferable to use the device according to the invention.

The cost-effectiveness of the method can be further improved due to the fact that in the process of deep drawing or pressing the outer section is subjected to molding, in particular, giving it a funnel shape. When performing this form, the outer portion is formed into an intermediate preform in the process of deep drawing or pressing, after which it is formed into a cylindrical shape using a rolling roller. As a rule, before deep drawing or pressing, the workpiece is subjected to heating. In this case, the outer portion is particularly easy to mold. A funnel-shaped shape can be understood, in particular, as a shape symmetrical with respect to the axis with a tapering section, and the wall in the longitudinal section can have a convex, concave or straight shape so that, in the particular case, it can be a cone.

Alternatively, it may be provided that during the deep drawing or pressing process, the outer portion is not molded. In particular, this option may be preferable in the case of difficult-to-process materials of the workpiece or in the case of large sizes of the protruding part of the round billet for vessels or pressure vessels having a large diameter and considerable length.

The highest quality of the hollow body can be achieved when, during the process of deep drawing or pressing, support is provided for the outer part of the part. For this, a clamp (sheet holder) can be used, for example, preferably in an annular shape, which is fed to the workpiece from the side opposite from the matrix. In addition or instead, at least one support roller may be provided. Alternatively, at least one pair of support rollers may be provided, in which case the workpiece, for best use, is placed between two adjacent support rollers constituting a pair of support rollers on the outer portion. To support the workpiece, at least one rolling roller may also be provided. Since rollers are used to support the part, in the process of deep drawing or pressing the workpiece, for best use, rotates at a low speed.

In accordance with the invention, the most accurately specified values of the wall thickness are obtained due to the fact that the workpiece on the cylindrical section during the rolling process or, at least during subsequent rolling by a roller is stretched. Thus, a predetermined wall thickness or a predetermined material hardening can be provided.

An additional advantage may consist in the fact that during the drawing process at the end section of the cylindrical shape, in particular, by adjusting the gap, a wall thickness transition is formed. A slight decrease in wall thickness can be used for the manufacture of the neck of the vessel and / or attached parts to fill it. The thickness of the end edge is predominantly multi-stage. This option is provided, mainly, in the case when the wall thickness of the cylindrical section is small and / or significantly thinned compared to the original thickness of the workpiece.

The most universal method is provided due to the fact that in the process of deep drawing or pressing, the wall thickness in the central section has a variable value. This can be achieved using the appropriate design of the clamping element and / or matrix, or mandrel, as well as the appropriate choice of extrusion speeds and / or extrusion forces. It is also possible to increase the wall thickness.

Especially in the case where in the area of the base of the hollow body there should be a place for the vessel to be connected, it is preferable to use the intermediate blank in the form of a perforated round part with a nose formed on it during deep drawing or pressing. Essentially, for example, intermediate blanks can be used, which are embossed round blanks with or without a central hole, with or without a spout, with or without the base of the vessel formed, and / or conical or cup-shaped intermediate blanks.

By reducing the wall thickness, material which is formed into a thickened spout can preferably be saved.

For the manufacture of a vessel with a place for attachment from the base, instead of or additionally, for example, it can be provided that, in particular, after deep drawing or pressing on the base section using at least one roller, the material is removed and formed into a flange. This step of the method, which for the best application is carried out for the same fastening of the part together with deep drawing, pressing and / or rolling, can also be performed before deep drawing or pressing. The material is preferably separated by means of at least one cutting roller, after which the material can be molded, in particular by means of at least one obturating roller made with a cavity, for forming, for example, the point of connection of the vessel, the connecting part or the neck of the vessel.

In addition, a particular advantage lies in the fact that before deep drawing or pressing, the workpiece is subjected to heating, in particular, to a molding temperature exceeding the recrystallization temperature. Additionally or instead, heating may be provided before running, drawing and / or rolling in a cylindrical shape, as well as after said operations. This can be done using known heating devices, such as gas burners or induction heating plants. The mandrel and / or matrix can also preferably be heated using an internal heating device.

In addition, according to the invention, it is provided that after running-in, and in particular after drawing out a cylindrical shape, the end section of the cylindrical shape is rolled up by feeding at least one roll-up roller and is closed, in particular, when forming the neck of the vessel.

Due to this, a hollow body, such as a gas vessel, can be made in an economical and quick manner.

Brief Description of the Drawings

The following is a more detailed description of the invention using preferred embodiments, which are schematically depicted in the drawings, in which:

Figure 1-5 shows the steps of the proposed method using the proposed device;

In Fig.6 shows a step of the method shown in Fig.3, performed using the proposed device with a different design;

7-10 shows the steps of the method in accordance with the first embodiment of the proposed method, implemented using the proposed device;

In Fig.11 shows a step of the method shown in Fig.7, performed using the proposed device with a different design;

On Fig-17 shows the steps of the method in accordance with the second variant of the proposed method, implemented using the proposed device;

On Fig-18 shows the steps of the method in accordance with the third variant of the proposed method, performed using the proposed device;

On Fig-21 shows the steps of the method in accordance with the fourth variant of the proposed method, implemented using the proposed device;

On Fig-26 shows the steps of the method in accordance with the fifth embodiment of the proposed method, implemented using the proposed device;

In Fig.27-29 shows another variant of the proposed method;

On Fig-32 shows another variant of the proposed method;

On Fig-35 shows another embodiment according to the invention for forming an influx of material on the vessel;

On Fig-38 depicts the steps of the method in accordance with another variant of the proposed method, implemented using the proposed device;

On Fig-42 shows the steps of the method in accordance with another variant of the proposed method;

On Fig shows the steps of the proposed method in accordance with another option;

On Fig-45 depicts the steps of the method when implementing the proposed method using the proposed device in accordance with another embodiment;

On Fig depicts the final steps of the method of manufacturing a vessel for gas.

The implementation of the invention

Identical or similar elements in all embodiments are denoted by the same reference numbers. As such, the various process variants may be freely combined.

Figure 1-5 shows the steps of the proposed method using the device according to the invention in accordance with the first embodiment. In accordance with the presented method, the workpiece 1 in the form of a round billet is first heated in a feeding device 51 with a holder to the molding temperature (Fig. 1). To this end, the supply device 51 may have, for example, a furnace, a flame generating device and / or an induction device.

After that, the workpiece 1 is clamped in the proposed device, which is a turning and pressing machine and / or machine for rotational drawing (figure 2). The turning and pressing machine and / or the machine for rotary drawing has a mandrel 11, as well as a clamping element 18, located opposite the mandrel 11 from the side of its end. The mandrel 11 and the clamping element 18 are located on the machine frame (not shown) with the possibility of rotation around the axis of rotation 10 and the ability to move relative to each other in the axial direction.

The pressing member 18 is surrounded by an annular matrix 40 having the ability to move relative to the pressing member 18 between the molding position shown in FIGS. 2 and 3 and the retracted position shown in FIGS. 4 and 5. In the molding position, the matrix 40 protrudes axially beyond the pressing element 18 in the direction of the mandrel 11. The pressing element 18 and the matrix 40 can be performed, in particular, as a mold with a hydraulic drive.

As shown in figure 2, the workpiece 1 is clamped between the mandrel 11, which has the shape of the inner contour of the manufactured hollow body, at least its base, and the matrix 40, which together with the clamping element 18 has the shape of the outer contour of the manufactured hollow body, at least in the area of the base of the vessel. Depending on the required shape of the base of the hollow body, the front end surface of the clamping element 18 can be concave (figure 3), convex (figure 6) or flat (not shown). In particular, an arched or round profile can be made.

As shown in FIG. 3, the mandrel 11 is then axially moved inward of the matrix 40, while this relative movement is preferably performed by simultaneously moving the pressing member 18 and the matrix 40 on the machine bed, while the mandrel 11 remains stationary.

When the mandrel 11 enters, in the central portion 4 of the workpiece 1, the base portion of the hollow body is molded during the molding operation. At the same time, the formation of the outer portion 5, located radially outward, in a conical shell (figure 3).

After that (Fig. 4), the matrix 40 on the pressing member 18 is axially retracted away from the mandrel 11 and, thus, is withdrawn from the processing area. The clamping element 18, located in the center of the matrix 40 and having on its front end surface a clamping disk of a smaller diameter in comparison with the matrix 40, continues to exert pressure on the workpiece 1 in the base section with a stop in the mandrel 11.

Then, the mandrel 11, the clamping element 18 and the workpiece 1 sandwiched between them are driven around the axis of rotation 10, and at least one rolling roller 31, made in the form of a roller for rotational drawing, is fed to the workpiece 1. For at least one passage (revolution) of the indicated roller, the outer portion 5 is rolled into a cylindrical shape 8 around the mandrel 11, is pulled (Fig. 5), and is removed from the mandrel 11 using a removable device (not shown). This method can be applied, in particular in the case of the average thickness of the round billet and the material, which is easy to undergo molding, and in the case of round billets having an average size of the protruding in the radial direction of the part.

To improve molding during processing using at least one obkatnogo roller 31 may be provided with additional heating.

7-10, an explanation of one of the variants of the proposed method. In contrast to the previously described embodiment, in which, during the pressing and / or deep drawing process, the entire workpiece 1 is subjected to molding, during the molding operation shown in FIG. 7, of the embodiment shown in FIGS. 7-10, the outer portion 5 of the workpiece details 1 remains undeformed, i.e. only part of the workpiece is molded.

Only in the next step (Figs. 8 and 9), the outer section 5 is first rolled into a cylindrical shape using at least one oblique roller 31 made in the form of a roller for rotational drawing, and then stretched to the final dimensions in at least one pass ( turnover) of the roller (figure 10) by rotational drawing.

This variant of the method is especially applicable for round billets having a smaller part protruding above the mandrel and, therefore, for smaller vessels.

Also in this case, depending on the required shape of the base, the clamping element 18 may have a convex (11) or concave (7) shape.

Another variant of the method, which, in particular, is applicable to workpieces of large thickness and / or difficult to process materials, shown in Fig.12-17.

In this embodiment of the method, the workpiece 1 during the initial molding operation is also subjected to molding only in the central portion 4, while the outer portion 5 located radially outward remains undeformed (Figs. 12 and 13).

After this, by rotational extrusion, a funnel-shaped intermediate preform is obtained (Figs. 14 and 15), the shell of which expands towards its open side. The funnel-shaped intermediate preform can have both constant and variable wall thickness.

By means of further rotational extrusion (Fig. 16), the outer portion 5 of the workpiece 1 is rolled around the mandrel 11, and thus molded into a cylindrical shape 8. At the same time, sufficient material can be made available for the subsequent formation of the second base of the vessel or on it is the connecting part.

After that (Fig. 17), the cylindrical mold 8 is stretched to its final dimensions by rotational drawing in at least one pass of the roller.

Another embodiment of the method is shown in Figs. 18 and 19. In this embodiment of the method, only the central portion 4 of the workpiece 1 is also formed during the pressing or deep drawing process. To prevent creasing on the outer portion 5 of the workpiece 1 during molding according to this embodiment The method provides that during the molding operation the workpiece 1 rotates at a low speed, and the outer section 5 is supported by the support rollers 61, 62. The support rollers 61, 62 form a pair of ornyh rollers, with one supporting roller 61 supports the workpiece 1 on the side of the pressing member 18 and the adjacent support roller 62 supports on its side of the mandrel 11. The axis of rotation of support rollers 61, 62 are in this case perpendicular to the axis of rotation 10 of the workpiece 1.

Another variant of the method, involving the support of the workpiece 1 during the molding operation, is presented in FIGS. 20 and 21. With this embodiment of the method, to support the outer portion 5 of the workpiece 1 during the first molding operation to the outer portion 5 of the workpiece 1 from the side of the pressing member 18, a run-in roller 31 is fed, and the workpiece 1 rotates at low speed.

For the method variant shown in FIGS. 22-24, a device is used in which a punch 13 is made centrally inside the mandrel 11, and can be axially displaced relative to the mandrel 11. A recess 14 is made in the pressing member 18, which corresponds to the shape of the punch 13.

In the embodiment of the method shown in FIGS. 22-26, two molding operations are performed before the rotary hood. As in the previously described embodiments, in the first molding operation (FIG. 23), the pressing member 18 is moved axially forward on the machine bed together with the surrounding matrix 40, and the opposite mandrel 11 enters the matrix 40, resulting in the workpiece 1 is molded.

In the second molding operation following it (Fig. 24), the punch 13 moves outward from the end of the mandrel 11 and enters the recess 14. In this molding operation, including the movement of the punch from the mandrel 11 in the direction of the pressing member 18, a nose can be formed vessel. Further, if required, the required size of the vessel nozzle can be given the necessary dimensions using the rolling roller.

As can be seen from Fig. 25, the matrix is retracted in order to create free space for the subsequent feeding of the roll-in roller 31. In accordance with Fig. 26, the required wall thickness transition 28 is performed by adjusting the clearance of the roll-in roller 31 during the drawing process.

The method described in FIGS. 22-26 is used, for best use, in the manufacture of articles from a center perforated round billet.

As an alternative to the previous step of the method depicted in FIG. 26, in accordance with FIGS. 27-29, the outer edge of the workpiece 1 can be tapered by the rolling roller 31 by axial molding, as shown in FIG. 28. The pre-formed workpiece thus formed can then be run around the mandrel 11 and elongated along the wall thickness to obtain the final cylindrical shape 8 using the roll-in roller 31, as shown in FIG. 29.

The following alternative option is presented in Fig.30-32. In contrast to the previously described process variants, the forming of the workpiece 1 is carried out by means of a rolling roll 31 into an intermediate blank of a bell-shaped or funnel-shaped form in one or more passes of the roller, as can be seen in Fig. 31. In conclusion, as in the previous method, run-in and final molding into a cylindrical shape 8 are carried out using the roll-in roller 31.

In accordance with Figs. 33-35, an embodiment of a method is shown in which a material influx 3 can be formed in the center of the workpiece 1 by means of a forming roller 31, which can be used, for example, to connect a vessel. In the outer part of the workpiece, the rolling roller 31 is pressed against the wall of the workpiece and moves towards the clamping member 18. As a result, the extruded or partially separated material is displaced from the clamping member 18, which, according to the invention, can be axially retracted direction and, thus, to form a free space for the influx of 3 material. In the influx 3 of the material, for example, a threaded hole can be made to accommodate the valve element.

In accordance with a variant of the method shown in FIGS. 36-38, an intermediate blank in the form of a perforated round blank with a spout formed on it is used as a workpiece for deep drawing or pressing 2. This intermediate blank is heated in the feeding device 51 (FIG. 36 ), after which, using the molding operation, the base of the vessel is obtained (Figs. 37 and 38).

In this embodiment, the clamping element 18 also has a recess 14 on the end surface, into which the spout 2 enters during molding. In the finished hollow body, the spout 2 can serve as a connection point for the vessel.

With the variant of the method shown in Figs. 39-42, deep drawing or pressing to form the portion of the base of the hollow body (Fig. 40) and the subsequent running-in of the outer section 5 (Fig. 42) are performed with various fixations of the part. In this case, both before deep drawing or pressing, and before the rotary drawing, a corresponding heating operation can be provided (Fig. 39 and Fig. 41, respectively).

In accordance with the embodiment shown in FIG. 43, a heating device with a holder as well as a forming tool are arranged in the feeding device 51.

In the embodiment shown in FIGS. 44 and 45, an apparatus according to the invention is used, in which the matrix 40 has two coaxially arranged matrix elements 41, 42, which can be axially moved relative to each other.

During the first molding operation depicted in FIG. 44, the outer die 42 is positioned so that its end surface is in line with the inner die 41. Thus, the workpiece 1 in its outer portion 5 is supported by the matrix element 42. In this case, to form the central portion 4, a mandrel 11 is inserted inside the first matrix element 41.

In the next molding operation shown in FIG. 45, the first, inner matrix element 41 is retracted back from the mandrel 11, and the second, outer matrix element 42 is advanced. As a result of this, the mandrel 11 also enters the conical hole of the second matrix element 42, as a result of which the outer portion 5 of the workpiece 1 is extruded into a funnel shape.

At the final step, the outer element 42 of the matrix can also be retracted back from the mandrel 11, and the outer portion 5 can be rolled into a cylindrical shape by rotational drawing.

On Fig shows the next step of the method, which can be provided for seaming (crimping) of the hollow body after the formation of the cylindrical shape 8. At this step of the method, the workpiece 1 is heated to the molding temperature, clamp it on the base in the cartridge of the rotary crimping machine and lead into rotation. Then, the end portion 7 of the workpiece 1 is rolled up, if necessary, with additional heat supply, using the rotary sunset roller 38 for at least one passage with the formation of the neck of the vessel with the nose (Fig. 46, right) or without the spout (Fig. 46, in the center). Moreover, the wall thickness of the neck of the vessel can be selected thinner, equal in thickness or thicker than the original thickness of the workpiece.

Claims (15)

1. A device for manufacturing a hollow body from a workpiece (1) in the form of a round billet, in particular a lathe or rotary drawing machine, comprising a mandrel (11) rotatably rotated around at least an axis of rotation (10) one obkatny roller (31) supplied to the mandrel (11) in the axial and / or radial direction, at least one matrix (40) for forming the Central section of the base of the specified part (1), made with the possibility of movement in the axial direction relative to the mandrel ( 11), pr What is more, the matrix (40) and / or the mandrel (11) are movable in the axial direction to feed the workpiece (1) into the matrix (40) to form the central portion of the base of the specified part, characterized in that it is equipped with a clamping element (18) located rotatably around the axis of rotation and axially displaced relative to the mandrel (11) for pressing the workpiece (1), and the specified at least one matrix (40) is located on the clamping element (18) and is arranged to move axial direction relative to it for removal from the end surface of the clamp after the operation of deep drawing or pressing.
2. The device according to claim 1, characterized in that the matrix (40) covers the clamping element (18) in an annular manner.
3. The device according to claim 1 or 2, characterized in that a punch (13) is placed in the mandrel (11) and / or in the clamping element (18), which can be extended from the side of the end face, respectively, of the mandrel (11) or the clamping element (18) for performing the molding operation.
4. The device according to claim 1 or 2, characterized in that the matrix (40) consists of several elements (41, 42) of the matrix, which can be moved in the axial direction relative to each other.
5. A method of manufacturing a hollow body from a workpiece (1) in the form of a round billet using the device according to any one of claims 1 to 4, in which the outer portion (5) of the rotatable workpiece (1) is formed into a cylindrical shape (8) in particular, by molding by rotary extrusion or by rotational drawing by feeding at least one obfuscating roller (31), by deep drawing or pressing the central portion (4) of the workpiece (1), the base portion of the hollow body is formed and fed by moving in the axial direction When the matrix (40) and / or the mandrel (11) are inserted, the workpiece (1) inside the matrix (40) to form the specified part.
6. The method according to claim 5, characterized in that the deep drawing or pressing of the Central section (4), as well as the running-in of the outer section (5) is carried out with the same fixing parts.
7. The method according to claim 5 or 6, characterized in that in the process of deep drawing or pressing, the outer portion (5) is left undeformed or given a funnel-shaped shape.
8. The method according to claim 5 or 6, characterized in that in the process of deep drawing or pressing they provide support for the outer section (5), in particular, with the help of at least one support roller (61, 62).
9. The method according to claim 5 or 6, characterized in that the cylindrical section (8) of the workpiece (1) is pulled in at least one passage of the roller.
10. The method according to claim 9, characterized in that during the drawing process at the end section (7) of the cylindrical shape (8), the required transition (28) of the wall thickness is obtained, in particular, with the help of at least one multistage rolled roller and / or by adjusting the clearance.
11. The method according to claim 5 or 6, characterized in that after molding and, in particular, after drawing, the end section of the cylindrical shape (8) is rolled up by feeding at least one sunset roll (38) and closed, in particular, when forming the neck of the vessel.
12. The method according to claim 5 or 6, characterized in that in the process of deep drawing or pressing in the Central section (4) change the wall thickness.
13. The method according to claim 5 or 6, characterized in that on the workpiece (1) in the form of a round billet perform a nozzle (2) with a hole.
14. The method according to claim 5 or 6, characterized in that, in particular, after deep drawing or pressing, the material in the base section is removed and molded into the flange using at least one roller.
15. The method according to claim 5 or 6, characterized in that before deep drawing or pressing the workpiece (1) is heated.
RU2009105676/02A 2006-08-24 2007-08-09 Method and device for production of hollow body from round billet RU2445181C2 (en)

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RU2009105676A (en) 2010-09-27
CN101528376A (en) 2009-09-09
MX2009001979A (en) 2009-05-28
DE102006039656A1 (en) 2008-02-28
US20100011830A1 (en) 2010-01-21
MX342763B (en) 2016-10-12
KR20090066268A (en) 2009-06-23
DE102006039656B4 (en) 2008-12-18
CN101528376B (en) 2012-06-27
BRPI0716581A2 (en) 2013-10-08

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