EP4171844A1 - Modulares umformwerkzeug, modularer umformwerkzeugsatz und verfahren zum herstellen von im wesentlichen rotationssymmetrischen teilen - Google Patents
Modulares umformwerkzeug, modularer umformwerkzeugsatz und verfahren zum herstellen von im wesentlichen rotationssymmetrischen teilenInfo
- Publication number
- EP4171844A1 EP4171844A1 EP21730495.5A EP21730495A EP4171844A1 EP 4171844 A1 EP4171844 A1 EP 4171844A1 EP 21730495 A EP21730495 A EP 21730495A EP 4171844 A1 EP4171844 A1 EP 4171844A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tool
- primary
- forming tool
- modular
- radial direction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 230000002787 reinforcement Effects 0.000 claims abstract description 94
- 238000003825 pressing Methods 0.000 claims abstract description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 41
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000003754 machining Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
- B21J13/03—Die mountings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/44—Making machine elements bolts, studs, or the like
- B21K1/46—Making machine elements bolts, studs, or the like with heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
- B21C3/02—Dies; Selection of material therefor; Cleaning thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
- B21C3/02—Dies; Selection of material therefor; Cleaning thereof
- B21C3/12—Die holders; Rotating dies
Definitions
- the invention relates to a modular forming tool and a modular forming tool set, in particular for the production of essentially rotationally symmetrical parts, such as bolts, in particular also eccentric bolts, or screws.
- Forming tool sets are already known from the prior art, these are used to convert a workpiece blank through, in particular multi-stage, plastic deformation into a defined forming geometry - through mostly non-tensioning loading.
- a workpiece blank is inserted between a Stem pel and a die of the forming tool set, the workpiece blank being formed in a targeted manner by the relative movement of the die to the die.
- the punch and / or the die has a core, the core making direct contact with the workpiece in order to effect reshaping of the workpiece.
- the forces occurring during forming are usually very high, especially during cold forming.
- the forming tools of the forming tool set usually have positioning aids which support the cores or the core in the direction of the relative movement - between the die and the punch - in a non-positive manner. Due to the large number of components involved and the individuality of the tools for each individual product, the dimensioning and design of the forming tools in the known forming tools is very extensive and costly. It is therefore the object of the present invention to reduce the costs involved in the construction and maintenance of forming tools and at the same time to enable workpieces to be manufactured reliably.
- a modular forming tool in particular a pressing tool, preferably for the production of essentially rotationally symmetrical parts, comprises at least one primary tool, in particular a core, at least one reinforcing pipe and at least one auxiliary tool, the forming tool extending along a longitudinal direction
- the Pri Milling tool has a workpiece processing surface, a jacket surface and two end faces, the workpiece processing surface being in contact with a workpiece or being designed to contact a workpiece, the jacket surface delimiting the primary tool in a radial direction, where the end faces limit the primary tool in the longitudinal direction zen, the reinforcing pipe having an inner jacket surface and an outer jacket surface, the primary tool being pressed into the reinforcing pipe centrally and / or directly via the jacket surfaces, so that the primary tool against enover the reinforcing pipe is secured in the radial direction, the inner circumferential surface and the outer circumferential surface each having a press fit, the auxiliary tool being bounded in the longitudinal direction by cover surfaces, the
- the modular forming tool is in particular a pressing tool, the modular forming tool serving to be used in a forming production step or in a forming production process.
- the modular forming tool is preferably used for the production of essentially rotationally symmetrical parts, such as bolts or screws.
- essentially rotationally symmetrical parts are in particular those parts that are preferably at least partially rotationally symmetrical about an axis, but these parts can have spiral-like outer contours, such as a thread, or tool engagement contours, which can destroy or break through the perfect rotational symmetry of these parts .
- bolts, eccentric bolts or screws are essentially rotationally symmetrical parts within the meaning of the invention.
- the modular forming tool can be used to reshape a workpiece in such a way that an essentially rotationally symmetrical part such as a bolt or a screw is created.
- the modular forming tool consists of several different modules, the modular forming tool comprising at least one primary tool, at least one arming tube and at least one auxiliary tool.
- the modular forming tool extends along a longitudinal direction.
- the longitudinal extension direction of the forming tool is in particular that direction in which the length of the modular forming tool is determined and / or around which the forming tool is built up.
- the forming tool and / or the reinforcing pipes and / or the auxiliary tools and / or the primary tools can be arranged in an assembled state in such a way that they reverse or enclose the direction of longitudinal extent.
- the direction of longitudinal extension can also be that direction in which the workpiece mainly extends and / or in which the forming tool moves when the workpiece is formed.
- the primary tool of the modular forming tool is used to make contact with the workpiece processing surface of the primary tool with a workpiece in such a way that the workpiece is formed by this contact. In other words, this can mean that the workpiece processing surface is that surface of the primary tool which makes contact with or can contact the workpiece in order to reshape it.
- the primary tool is specially designed as a core, preferably made of hard metal.
- a core can be understood to mean that the primary tool is designed in such a way that, viewed in the radial direction, it at least partially forms an inner core of the modular forming tool which, however, is preferably hollow (e.g. tubular).
- the primary tool is therefore designed in such a way that the workpiece machining surfaces and / or the workpiece machining surface of the primary tool delimit or delimit the primary tool inward in the radial direction.
- the primary tool also has a lateral surface and two end surfaces. The jacket surface delimits the primary tool in the radial direction, in particular to the outside.
- the jacket surface forms the part of the respective primary tool that points outward in the radial direction.
- the radial direction extends perpendicular to the longitudinal direction.
- this can mean that the radial direction points radially away from the longitudinal direction of extension.
- the jacket surface of the primary tool is designed to be at least essentially rotationally symmetrical to or around the direction of longitudinal extent.
- at least essentially rotationally symmetrical is to be understood as meaning that the lateral surface is primarily formed by a cylindrical surface around the direction of longitudinal extent.
- the primary tool is limited by the end faces.
- the end faces are in particular designed in such a way that they have a normal which is essentially parallel to the direction of longitudinal extent.
- the end faces of the primary tool are essentially flat, this plane in which the respective end face lies having a normal which is essentially parallel to the direction of longitudinal extent is.
- the modular forming tool particularly preferably has a multiplicity of primary tools, in particular 2, 3 or 4 primary tools, which can advantageously all have the features described above.
- these primary tools are designed or arranged within the modular forming tool in such a way that they each have an end face which directly contacts an end face of a further primary tool. In other words, this can mean that the primary tools can be arranged next to one another or one behind the other in the longitudinal direction so that they make direct contact with one another. This enables a particularly compact modular forming tool to be achieved.
- the modular forming tool also includes at least one reinforcement tube.
- the reinforcement pipe has an inner jacket surface and an outer jacket surface.
- the inner jacket surface limits the reinforcement pipe inward in the radial direction and the outer jacket surface limits the reinforcement pipe outward in the radial direction.
- the inner circumferential surface and / or the outer circumferential surface of the reinforcement pipe, preferably all reinforcement pipes, is / are expediently designed to be at least essentially rotationally symmetrical with respect to or around the direction of longitudinal extent. Both the inner circumferential surface and the outer circumferential surface are advantageously designed to be at least essentially rotationally symmetrical about the direction of longitudinal extent.
- the primary tool in particular all primary tools, are pressed into a reinforcement pipe over the outer surface of the respective primary tool.
- the jacket surface forms of the primary tool a press fit with an inner jacket surface of at least one reinforcement pipe. This press fit between the inner jacket surface of the reinforcement pipe and the jacket surface of the primary tool prevents or hinders a displacement of the primary tool in the radial direction with a positive fit and in the longitudinal direction with a force fit (press fit) with respect to the reinforcement pipe.
- each primary tool is pressed in this way into a reinforcing pipe.
- a press fit is understood to mean that there is an interference fit between the two contacting surfaces of the components. The press fit prevents displacement between the respective primary tool and the reinforcement pipe.
- the inner circumferential surface and the outer circumferential surface of the reinforcement pipes or the reinforcement pipe of the modular forming tool are designed or arranged in an assembled or built-in or mounted state of the modular forming tool in particular in such a way that at least the inner circumferential surface and advantageously also the outer circumferential surface each have a press fit train with another component.
- These press fits can be, for example, press fits between a reinforcement pipe and a primary tool or, alternatively, a reinforcement pipe can also be pressed into a further reinforcement pipe.
- a reinforcing pipe can also preferably form a press fit with a tool holder, in particular via the outer jacket surface.
- Each reinforcement pipe can therefore advantageously be pressed into a different component.
- the tool holder is in particular the component of the forming tool which surrounds and / or receives the reinforcing pipe (s), the auxiliary tool (s) and the primary tool (s). In particular, the tool acceptance therefore limits the forming tool in the radial direction or radially outward.
- the tool holder advantageously has an inner jacket surface which is likewise cylindrical and / or essentially rotationally symmetrical about the direction of longitudinal extent.
- this inner jacket surface is arranged in the forming tool in such a way that it is connected to the outer jacket surfaces of the reinforcing pipes of the forming tool and / or with the forming tool. Can contact running surfaces of the auxiliary tools or contacted in an assembled state, which have the largest radial dimension.
- the forming tool also comprises at least one auxiliary tool, preferably a large number of auxiliary tools.
- This auxiliary tool or the auxiliary tools of the modular forming tool have cover surfaces in the longitudinal direction. In other words, the auxiliary tool is therefore limited in the direction of longitudinal extent by the cover surfaces, in particular completely by the cover surfaces.
- these top surfaces are flat and / or each have a normal which is essentially parallel to the direction of longitudinal extension.
- the auxiliary tool also has a circumferential surface which limits the auxiliary tool to the outside in the radial direction; in particular, the auxiliary tool is limited to the outside in the radial direction exclusively by the circumferential surface.
- the circumferential surface is that surface which delimits the auxiliary tool to the outside in the radial direction.
- This circumferential surface is advantageously designed to be essentially rotationally symmetrical to the direction of longitudinal extension in order to achieve simple and inexpensive production of the auxiliary tool.
- a particularly mechanically loadable design of the auxiliary tool can also be achieved in this way.
- the circumferential surface is designed in such a way that it has a clearance fit in the radial direction.
- a clearance fit is understood to mean that the circumferential surface of the at least one auxiliary tool, preferably all auxiliary tools, has clearance or undersize in relation to the nominal or nominal diameter.
- a clearance fit can also be understood in this context to mean that the auxiliary tool has a clearance fit or spatial play in relation to the part immediately surrounding it in the assembled state, which can in particular be a tool holder.
- the auxiliary tools of the modular forming tool are primarily used to be able to take up axial forces from the reinforcement pipes and / or the primary tools in a form-fitting manner during the machining process along the longitudinal extension direction.
- auxiliary tools themselves are advantageously themselves also held positively in the tool holder, at least in the direction in which the machining forces when forming the workpiece we ken.
- This form-fitting support of the primary tool enables the primary tools and the reinforcement pipes to be securely fixed.
- the clearance fit of the auxiliary tools in the radial direction ensures that the circumferential surface of the auxiliary tools should not transmit any shear forces or at least only very low shear forces.
- auxiliary tools and / or the reinforcing pipes and / or the primary tools are expediently designed in one piece. This means that these components can also withstand high loads.
- the forming tool advantageously has an, in particular external, tool receptacle, with all primary tools, reinforcing pipes and auxiliary tools of the forming tool extending at least partially within the tool receptacle.
- the tool holder therefore forms in particular the radially outwardly delimiting enclosure of the Umformtechnik tool.
- the tool holder can therefore serve as a type of surrounding, in particular cylindrical, outer boundary of the forming tool or form such a boundary.
- the tool holder advantageously has a continuous, in particular central, recess and / or an inner jacket surface which, for example, can also be formed at least partially by the recess.
- This recess or this inner jacket surface advantageously extends in the longitudinal direction, with inner half of this recess or in the volume spanned by the inner circumferential surface all primary tools, reinforcing pipes and auxiliary tools of the forming tool can be arranged or - in a mounted state - are arranged.
- all primary tools, reinforcing pipes and auxiliary tools of the forming tool can be arranged or - in a mounted state - are arranged.
- at least some parts of the primary tools, the reinforcement pipes and / or the auxiliary tools can also be partially located outside the outer tool holder when viewed in the longitudinal direction.
- each primary tool, reinforcement pipe and / or the auxiliary tool is at least partially - in an installed state - within the tool holder, or extends, in particular within the recess and / or within the area of the inner jacket surface spanned volume.
- At least one auxiliary tool is indirectly and / or directly positively and / or non-positively supported against the tool holder, in particular in a positive and / or negative direction along the longitudinal extension direction, in order to avoid the high forces on the primary tools and / or the To be able to safely record and derive auxiliary tools.
- At least one top surface of an auxiliary tool makes direct contact with a reinforcement pipe and / or a primary tool.
- a particularly secure positive positioning of the reinforcement pipe and / or the primary tool can be achieved, in particular in the direction of longitudinal extension.
- this can also relieve the press fit between the primary tool and the reinforcement pipe which surrounds the primary tool, so that material and / or weight can be saved on the reinforcement pipes.
- the top surface of the auxiliary tool is intended to make direct contact with the reinforcing pipe and / or a primary tool, in particular with its end face.
- At least one top surface of an auxiliary tool is armie-contact-free and / or primary tool-free.
- Reinforcement pipe contact-free and / or primary tool contact-free is understood to mean that in at least one auxiliary tool, at least one cover surface has no direct or indirect contact with a reinforcement pipe and / or with a primary tool.
- the installed condition of the forming tool is particularly decisive for this determination.
- this auxiliary tool can act as a mere positioning aid, similar to a shim.
- all auxiliary tools are designed or arranged in such a way that they have a maximum of one top surface that contacts a reinforcing pipe and / or a primary tool.
- This formation or arrangement of the top surface or the top surfaces of the auxiliary tools in relation to the reinforcement pipes and / or to the primary tools ensures that the auxiliary tools are only loaded in one direction, advantageously exclusively in the positive or negative longitudinal direction.
- This can save manufacturing costs, in particular, because the top surfaces of the auxiliary tool, which are designed to be free of contact with pipes and / or primary tools, do not have to be of the same quality as the top surfaces of the auxiliary tools that make contact with the reinforcement pipes and / or make contact with the primary tool.
- the outer dimension of the circumferential surface of at least one auxiliary tool advantageously corresponds essentially to the nominal dimension of the outer surface of a reinforcing pipe.
- the "essentially nominal dimension" corresponds in particular if the outer dimension of the circumferential surface of the relevant auxiliary tool and the outer dimension of the outer jacket surface of the reinforcing pipe have the same dimensions apart from the tolerance class. Therefore, in particular, the relevant outer jacket surface of the reinforcing pipe and the relevant dimensions of the circumferential surface of the auxiliary tool are such that they correspond to the same nominal dimension, so that they differ only in terms of their tolerance class.
- the relevant outer circumferential surface of the reinforcement pipe can have a tolerance class from m to u and the circumferential surface of an auxiliary tool can, for example, have a tolerance class from b to h.
- DIN ISO 286-1 can be decisive for the tolerance class.
- the outer dimension of the Umlaufflä surface of all auxiliary tools essentially corresponds to the nominal dimension of the outer jacket surface of at least one other reinforcing pipe of the modular forming tool.
- this can mean that the outer dimension of the circumferential surfaces of each auxiliary tool, apart from the tolerance class, corresponds at least to the outer dimension of a reinforcement pipe of the modular forming tool.
- the forming tool expediently has a plurality of reinforcement tubes, the reinforcement tubes being the primary tool, in particular all of them Primary tools, enclose in the radial direction.
- the reinforcement tubes being the primary tool, in particular all of them Primary tools, enclose in the radial direction.
- a simple modular design of the modular forming tool can be achieved, in which costs can be saved, because the sub-assembly of reinforcing pipes and the primary tool or tools can thereby be pre-assembled.
- high modular damping of the entire forming tool can be achieved through the contact surface or the contact surfaces between the reinforcement pipes and the primary tool or primary tools, so that particularly good vibration properties result.
- "Enclosing" in the radial direction is understood to mean that all primary tools, viewed in the radial direction, have at least one reinforcement tube which surrounds the primary tool or all primary tools.
- At least one end face of a primary tool closes flush with a reinforcing pipe in the longitudinal direction, this reinforcing pipe advantageously surrounding the primary tool.
- the flush closure of the primary tool with a reinforcement pipe advantageously with all reinforcement pipes that enclose the primary tool, can save costs, because this enables pre-assembly to take place effectively. Due to this prefabrication, certain submodules can therefore already be prefabricated, so that costs can be saved.
- a flush closure is understood to mean that, in particular, an end face of the primary tool and a surface delimiting the reinforcing pipe lie in one plane in the direction of longitudinal extent.
- this plane is designed in such a way that it has a normal which is at least substantially parallel to the direction of longitudinal extent.
- a flush closure can be understood to mean that at least one distal end of a primary tool and a, in particular surrounding, tool m michsrohrs lie in the longitudinal direction in one plane.
- all of the reinforcing pipes surrounding the primary tool terminate flush with the primary tool surrounded by sem in the direction of longitudinal extent.
- At least one end face of a primary tool terminates flush in the direction of longitudinal extension with all reinforcement pipes which surround or surround the respective primary tool.
- the reinforcement pipes and / or the auxiliary tools made of roller bearings are preferably steel.
- a particularly mechanically resilient construction of the modular forming tool can be achieved, so that even high forming forces can be safely exerted on the workpiece without the risk of mechanical failure of the modular forming tool.
- the reinforcement pipes are expediently designed in such a way that all reinforcement pipes with essentially the same outer dimensions in the radial direction also have essentially the same inner dimensions in the radial direction. In other words, this can mean that all reinforcement pipes which have inner jacket surfaces of essentially the same dimensions also have outer jacket surfaces that are essentially equally dimensioned. "Essentially the same” or “essentially the same” dimensioning is given in particular when the relevant dimensions are only a maximum of +/- 0.08 mm, preferably a maximum of +/- 0.05 mm, particularly preferably a maximum of +/- 0 .02 mm and particularly preferably a maximum of +/- 0.01 mm from one another.
- the reinforcement pipes which have a cylindrical inner jacket surface and a cylindrical outer jacket surface, can be designed in such a way that the reinforcement pipes have the same diameter as the inner jacket surface also aufwei sen the same diameter with regard to the outer circumferential surface.
- the modularization of the modular forming tool can be increased further, so that costs can be saved.
- the length of these reinforcing pipes in the direction of elongation can, however, be different despite the same inner and outer dimensions.
- the lengths of these reinforcing pipes are also the same in the longitudinal direction.
- At least the inner reinforcement pipes are designed in such a way that the ratio of the inner dimensions in the radial direction to the outer dimension in the radial direction is in a range from 0.7 to 0.98, preferably in a range from 0.8 to 0.97 and particularly preferably in a range from 0.85 to 0.95.
- the inner Ar m istsrohre are in particular the reinforcement pipes, which, in particular in an installed or pressed state, contact a further reinforcement pipe on their outer jacket surface. Therefore, in particular, the reinforcement pipes, the outer surface of which is in contact with the tool holder, are not internal reinforcement pipes. As an alternative or in addition, only those reinforcement pipes that are not internal reinforcement pipes which have the largest dimension in the radial direction are preferred.
- a ratio of the inner dimension in the radial direction to the outer dimension in the radial direction in a range of 0.7 to 0.98, a geometry of the reinforcing pipes that is particularly easy to manufacture can be achieved, so that costs can be saved as a result.
- a ratio of 0.8 to 0.97 results in particularly mechanically resilient reinforcement pipes. Decisive for determining the ratio are the maximum external dimensions in the radial direction of the reinforcement pipe to the minimum internal dimensions of the reinforcement pipe in the radial direction.
- the modular forming tool is expediently a punch and / or a die.
- the modular forming tool can be designed both as a punch and / or as a die.
- a die is a forming tool which is not moved during the forming process, but rather is arranged in a stationary manner in relation to the machine tool.
- a punch within the meaning of the invention is a forming tool which, during the forming process, is moved in relation to the machine tool and / or in relation to the die.
- the modular forming tool is preferably delimited in the longitudinal direction by a screw plug.
- this can mean that, viewed in the direction of longitudinal extension, at least one locking screw forms a distal end section of the modular forming tool in the direction of longitudinal extension.
- a screw plug By using a screw plug, a particularly simple and safe definition of the modular components of the forming tool can be achieved.
- the tool holder advantageously has an internal thread into which the locking screw is screwed or can be screwed.
- the screw plug expediently has a threaded section, the threaded section having a nominal diameter which is greater than the maximum dimension of all reinforcing tubes of the forming tool in the radial direction. Due to this particularly large design of the threaded section of the screw plug, a particularly high mechanical load capacity can be achieved.
- the nominal diameter of the thread section is in particular the outer diameter of the thread. Particularly preferably, the nominal diameter of the thread is 1, 1 to 1, 4 times the maximum paint dimension of all reinforcing pipes of the forming tool in the radial direction. As a result, a mechanically resilient as well as compact design of the threaded section can be achieved.
- the relevant maximum dimension of all reinforcing pipes of the forming tool in the radial direction is in this context the largest possible dimension in the radial direction of the reinforcing pipes of the relevant modular forming tool.
- the maximum dimensions of all reinforcement pipes of the forming plant be the maximum outside diameter of the largest reinforcement pipe in the radial direction.
- the relevant modular forming tool is in particular the die or the punch on which the screw plug is mounted.
- Another aspect of the invention can relate to a modular forming tool set which can have two modular forming tools according to the above-described configurations, one modular forming tool being a punch and the second modular forming tool being a die.
- Another aspect of the invention relates to a method for producing essentially rotationally symmetrical parts, in particular screws and / or bolts, comprising the steps of: providing a workpiece blank and reshaping the workpiece blank using a modular reshaping tool as described above and / or below.
- the reshaping of the workpiece blank takes place through the contact of the workpiece blank with the workpiece processing surface (s) of the primary tool (s) of the modular forming tool.
- the reshaping of the workpiece blank into an essentially rotationally symmetrical part can only take place in one reshaping step. Alternatively, however, several reshaping steps can also be carried out in the manufacturing process.
- the manufacturing process can also include further processing steps, such as re-cutting and / or rolling a thread and / or the application of lubricants in order to simplify the shaping of the workpiece blank.
- FIG. 1 shows a section through a modular forming tool in the form of a matrix
- Figure 2 shows a section through a modular forming tool in the form of a punch
- Figure 3 shows a modular forming tool set.
- the forming tool 1 extends along the longitudinal direction L, the radial direction R extending radially away from this longitudinal direction L.
- the forming tool 1 comprises a tool holder 60 as well as numerous primary tools 10 and reinforcement pipes 30.
- the forming tool 1 also has two auxiliary tools 50.
- the tool holder 60 has an inner lateral surface which forms a press fit with the outer lateral surfaces 34 of the outer reinforcement pipes 30.
- the auxiliary tools 50 and their circumferential surface 54 have clearance fits with respect to the tool holder 60 or the inner circumferential surface of the tool holder 60.
- the reinforcement pipes 30 are each mechanically fixed in place via their inner circumferential surface 32 and over the outer circumferential surface 34 via a press fit, so that this press fit counteracts a displacement in the longitudinal direction L.
- the reinforcement pipes 30 closest to the longitudinal extension direction L in the radial direction R or the central reinforcement pipes 30 each at least partially enclose an auxiliary tool 50.
- These auxiliary tools 50 are pressed over their outer surface 14 into the inner surface 32 of the closest central reinforcement pipe 30.
- each primary tool 10 can be fixed in the radial direction R and at least partially also in the longitudinal direction L.
- the end faces 16 of the pri- Marking tools 10 each form the distal ends of the primary tools 10 in the positive and / or negative longitudinal direction L.
- the primary tools 10 In an assembled state, as shown in FIG Form the distal end of the forming tool 1.
- Radially inward in the radial direction R the primary tools 10 each form a workpiece machining surface 12.
- the primary tool 10 can in particular be formed from a hard metal, wherein the reinforcement pipes 30 and / or the auxiliary tools 50 can be formed from roller bearing steel.
- the primary tools 10 and the reinforcement pipes 30 each form a press connection to one another via the contacting Man faces 14 of the primary tools 10 and the inner circumferential surfaces 32 of the reinforcement pipes.
- the auxiliary tools 50 do not have any press fit, so that they are in no way held by a press fit in the direction of longitudinal extent L. Rather, there is a clearance fit between the circumferential surface 54 of the auxiliary tool 50 and the tool holder 60.
- a modular forming tool 1 in the form of a punch 2 is shown.
- the punch 2 has a primary tool 10 which is enclosed by the reinforcement tubes 30.
- the reinforcement pipes 30 each have in the radial direction R inwardly an inner lateral surface 32 which forms a press fit with the adjacent or closest surface.
- the punch 2 also has a few auxiliary tools 50 which are used to support the primary tools 10 and the reinforcement pipes 30 in the direction of the longitudinal extension direction L in a form-fitting manner.
- These auxiliary tools 50 each have an order running surface 54, which zen the respective auxiliary tool 50 in the radial direction R.
- These circumferential surfaces 54 each have a clearance fit to their outer surrounding or contact partner in the radial direction R.
- the auxiliary tools 50 and the reinforcement pipes 30 has the punch 2 also has a locking screw 70, which forms a distal end of the punch 2 along the longitudinal direction L.
- the locking screw 70 has a threaded section 72 which has a nominal diameter that is greater than the maximum dimension of all reinforcement tubes 30 of the punch 2.
- FIG. 3 shows a forming tool set which comprises a forming tool 1 in the form of a punch 2 and a forming tool 1 in the form of a die 3.
- the punch 2 shown in FIG. 3 and the die 3 shown can each correspond to the punch 2 from FIG. 2 and the die 3 from FIG.
- the punch 2 can be moved in relation to the die 3 along the longitudinal extension direction L in order to achieve a forming of the workpiece.
- the free space F within the punch 2 can be used to shape or form the head of a bolt or a screw.
- the head of the workpiece in particular that of a screw and / or a bolt, can be created by moving part of the material of the workpiece within the free space F and / or into the free space F.
- the primary tools 10 also serve to achieve the design of the workpiece, such as, for example, a thread and / or a head and / or a shaft of an essentially rotationally symmetrical component.
- the auxiliary tools 50 are each arranged over their circumferential surface 54 in such a way that they have a clearance fit in the radial direction R.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Forging (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020116567.6A DE102020116567B4 (de) | 2020-06-24 | 2020-06-24 | Modulares Umformwerkzeug, modularer Umformwerkzeugsatz und Verfahren zum Herstellen von im Wesentlichen rotationssymmetrischen Teilen |
PCT/EP2021/064192 WO2021259586A1 (de) | 2020-06-24 | 2021-05-27 | Modulares umformwerkzeug, modularer umformwerkzeugsatz und verfahren zum herstellen von im wesentlichen rotationssymmetrischen teilen |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4171844A1 true EP4171844A1 (de) | 2023-05-03 |
Family
ID=76305874
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP21730495.5A Pending EP4171844A1 (de) | 2020-06-24 | 2021-05-27 | Modulares umformwerkzeug, modularer umformwerkzeugsatz und verfahren zum herstellen von im wesentlichen rotationssymmetrischen teilen |
Country Status (6)
Country | Link |
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US (1) | US20230241667A1 (de) |
EP (1) | EP4171844A1 (de) |
CN (1) | CN116033977A (de) |
DE (1) | DE102020116567B4 (de) |
MX (1) | MX2022016435A (de) |
WO (1) | WO2021259586A1 (de) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS5519644Y2 (de) | 1976-09-21 | 1980-05-10 | ||
JPS56136248A (en) * | 1980-03-18 | 1981-10-24 | Akio Tosa | Finishing punch for bolt |
JP3567264B2 (ja) * | 1996-10-28 | 2004-09-22 | 愛三工業株式会社 | チタン用熱間押出鍛造型 |
DE19804700A1 (de) * | 1998-02-06 | 1999-08-19 | Danfoss As | Formwerkzeug |
DE102004042706B3 (de) | 2004-09-03 | 2006-03-09 | Daimlerchrysler Ag | Werkzeug zum Thixoschmieden |
DE102014111724B4 (de) | 2014-08-18 | 2016-03-03 | Kamax Holding Gmbh & Co. Kg | Matrizenmodulsatz für Presswerkzeuge zum Herstellen von Schrauben |
CN104226706B (zh) * | 2014-08-25 | 2016-04-20 | 中国航天科技集团公司长征机械厂 | 一种径向尺寸可微调的螺旋型弹性模座 |
-
2020
- 2020-06-24 DE DE102020116567.6A patent/DE102020116567B4/de active Active
-
2021
- 2021-05-27 CN CN202180044876.4A patent/CN116033977A/zh active Pending
- 2021-05-27 MX MX2022016435A patent/MX2022016435A/es unknown
- 2021-05-27 WO PCT/EP2021/064192 patent/WO2021259586A1/de active Search and Examination
- 2021-05-27 US US18/010,287 patent/US20230241667A1/en active Pending
- 2021-05-27 EP EP21730495.5A patent/EP4171844A1/de active Pending
Also Published As
Publication number | Publication date |
---|---|
CN116033977A (zh) | 2023-04-28 |
WO2021259586A1 (de) | 2021-12-30 |
DE102020116567A1 (de) | 2021-12-30 |
US20230241667A1 (en) | 2023-08-03 |
DE102020116567B4 (de) | 2024-10-10 |
MX2022016435A (es) | 2023-01-30 |
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