EP3875221A1 - Procédé de serrage de pièces ainsi que dispositif d'estampage et dispositif de serrage - Google Patents

Procédé de serrage de pièces ainsi que dispositif d'estampage et dispositif de serrage Download PDF

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Publication number
EP3875221A1
EP3875221A1 EP20207248.4A EP20207248A EP3875221A1 EP 3875221 A1 EP3875221 A1 EP 3875221A1 EP 20207248 A EP20207248 A EP 20207248A EP 3875221 A1 EP3875221 A1 EP 3875221A1
Authority
EP
European Patent Office
Prior art keywords
embossing
workpiece
clamping
depressions
teeth
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
Application number
EP20207248.4A
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German (de)
English (en)
Inventor
Günter Lang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lang Technik GmbH
Original Assignee
Lang Technik GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Lang Technik GmbH filed Critical Lang Technik GmbH
Publication of EP3875221A1 publication Critical patent/EP3875221A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B1/00—Vices
    • B25B1/24—Details, e.g. jaws of special shape, slideways
    • B25B1/2405—Construction of the jaws
    • B25B1/241—Construction of the jaws characterised by surface features or material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/02—Clamps with sliding jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/16—Details, e.g. jaws, jaw attachments
    • B25B5/163—Jaws or jaw attachments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/0052—Machines or apparatus for embossing decorations or marks, e.g. embossing coins by pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/02—Dies; Accessories
    • B44B5/026—Dies

Definitions

  • the invention relates to a method for clamping workpieces, in particular workpieces made of ductile material, as well as an embossing device for use in this method and a clamping device also for use in this method.
  • the workpieces For machining workpieces in machine tools, especially for machining, the workpieces must be firmly clamped and held in suitable clamping positions.
  • the clamping must be designed in such a way that greater forces can be absorbed during machining operations to be carried out on the workpiece without the workpiece moving in the clamping device or being released from it.
  • the workpiece should be accessible as easily as possible in order to be able to carry out as many machining operations as possible one after the other on the workpiece with a single clamping.
  • the EP 1 071 542 B1 a method for clamping workpieces, in which, in a preparatory work step, evenly spaced depressions are made on the workpiece, which only serve as coupling elements when clamping with a corresponding clamping device, but are otherwise inoperative.
  • the workpieces are held in vices, which are used for frictional holding have contact surfaces on their clamping jaws and which have form-locking elements complementary to the recesses of the workpiece for positive positioning and securing in position.
  • the workpiece is mixed with it and clamped positively and frictionally.
  • This tensioning system has basically proven itself.
  • a clamping method has become known in which the workpiece is provided with a clamping structure in the vicinity of its base.
  • This includes two grooves provided on the flanks of the workpiece, into which corresponding strip-like projections of two clamping jaws of a vice grip.
  • the grooves are made, for example, in a milling process and produce a form-fitting connection between the clamping jaws and the workpiece.
  • the wall that remains on the workpiece and delimits the groove must be resistant to bending and breaking, which requires a certain minimum wall thickness of the groove wall. This determines the space required by the clamping structure on the workpiece.
  • clamping device When designing clamping systems, it must be expected that users will want to machine a spectrum of different workpieces made from different materials without wanting to commit to a specific workpiece type and material type. This must be taken into account when designing clamping systems. On the one hand, the clamping device must hold the workpieces securely, even if they are exposed to great machining forces, and on the other hand, the workpieces must not be damaged by the clamping device, such as inadmissible deformations or breakouts.
  • the clamping method according to the invention is based on the fact that, in a preparatory work step, deformations are applied to the workpieces to be clamped in a defined grid, for example in the form of a series of evenly spaced depressions. These depressions (or other deformations) serve as positioning and coupling elements when clamping in a corresponding clamping device, but they otherwise have no function on the workpiece.
  • the clamping jaws To clamp the workpieces, the clamping jaws have contact surfaces to hold the workpiece in a frictionally engaged manner.
  • the clamping jaws are provided with form-locking elements, which are preferably arranged on the contact surfaces and are used for form-locking positioning and for securing the position of the workpiece. The workpiece is thus clamped in a mixed frictional and form-fitting manner.
  • the deformations applied to the workpiece are arranged in a grid with a center-to-center distance of 2.5 mm to 3.5 mm from one another. It has been shown that with such a grid an optimum can be achieved with regard to the holding force and the area stressed on the workpiece for holding. Local stress peaks in the workpiece are reduced to a level that is tolerable for most materials and a uniform transfer of holding force between the clamping jaw and the workpiece is achieved. Breakouts, cracks on the workpiece or other workpiece damage are avoided.
  • the depressions are preferably arranged in a row which extends along the lower edge of the workpiece adjacent to the base surface of the workpiece.
  • the row is an even row.
  • the depressions can, however, also be arranged in two or more rows, preferably arranged parallel to one another.
  • the depressions of the two rows can be arranged adjacent to one another in pairs or alternatively also offset from one another.
  • the grid spacing is set to a value between 2.5 mm and 3.5 mm, preferably 3 mm.
  • the deformations to be applied to the workpiece are preferably depressions which are made in the workpiece by means of an embossing device by means of plastic deformation, in that each depression is produced by means of a stamping tooth through material displacement.
  • the depressions are preferably arranged in a straight row and at constant intervals from one another. Non-recessed or slightly raised areas are formed between the recesses, which separate the individual recesses from one another.
  • the depressions preferably have a rectangular cross section with rounded corners, which decreases towards the bottom of the depression.
  • the rectangular indentations preferably have a length in the direction of the row in which they are arranged which is at least as great as the length to be measured in the same direction of the area between two adjacent depressions.
  • the displacement of the material which occurs when the indentations are produced leads to a flow of the material of the workpiece, as a result of which a zone of solidified material can be produced under and around the indentation.
  • this zone can have an increased strength so that it is particularly suitable for absorbing and distributing forces in the workpiece.
  • the embossing tool when embossing between adjacent embossing teeth, a distance is left between the embossing tool and the workpiece, into which the displaced material can penetrate.
  • the workpiece surface which was smooth before the embossing process, for example cylindrical or flat, is thereby given the desired deformations, for example depressions, during the preparatory work step.
  • desired deformations for example depressions
  • wavy or raised deformations of the workpiece surface can also form.
  • the clamping surfaces of the clamping jaws are opened when the workpiece is clamped preferably brought into full contact with the workpiece surface.
  • the clamping surface of the clamping jaw is pressed strongly against the workpiece surface which may have been somewhat deformed in the preparatory work step.
  • the workpiece surface can be smoothed in that material pushed out of the workpiece surface is deformed again (elastically or plastically) until, in the ideal case, the flat clamping surface is in full contact with the workpiece. This can be accompanied by less further plastic deformation of the workpiece, as a result of which the workpiece is held particularly securely in the clamping device between the clamping jaws.
  • the embossing device is used to carry out the method according to the invention.
  • the embossing device includes at least one embossing die which has an embossed structure defining a grid, the grid dimension being between 2.5 mm and 3.5 mm.
  • the stamp can be a linearly movable stamp, a roller stamp or the like.
  • the embossing device contains an abutment for receiving the workpiece, the abutment being arranged opposite the embossing die.
  • the abutment itself can be designed as an embossing die, so that the desired positioning and coupling elements are attached to the workpiece in a single operation on two opposite sides facing away from one another.
  • the embossing die or dies are preferably pressed against the workpiece by means of a force generating device.
  • the force generating device is preferably set up to allow the die (s) to act on the workpiece with a predetermined force. This means that the embossing depth is determined by the ductility determined by the material of the workpiece. In any case, damage to the workpiece due to excessive force is prevented.
  • the depressions are produced by means of the embossing device, preferably by measuring the penetration depth of the embossing teeth. It can thereby be ensured that the depressions reach a desired depth in the embossing process, but that a maximum depth is not exceeded. There are no mechanical means to limit the penetration depth, such as stop teeth on the embossing jaws (between the embossing teeth). Rather, a free space is formed between two embossing teeth, the delimitation of which does not come into contact with the workpiece.
  • the penetration depth of the embossing teeth is preferably set to a value that is greater than the tooth height of the retaining teeth. This prevents uncontrolled workpiece deformation during clamping as well as excessive wear on the retaining teeth.
  • the embossing device preferably has several embossing teeth, the center distance of which corresponds to the grid dimension.
  • Each embossing tooth is preferably provided with at least one, preferably with two or more concavely rounded flanks, so that the flank angle decreases more and more during embossing at the point of penetration of the workpiece as the embossing tooth penetrates. In this way, even with different ductile materials, similar penetration depths result, so that the workpieces embossed in this way always fit on the clamping device.
  • a low variability in the penetration depths of the embossing teeth is achieved. This ensures that the form-fitting elements of the clamping device fit into the recesses made there regardless of the material used for the workpiece. This is true at least for a wide range of workpiece materials.
  • the embossed depressions always have a depth that is greater than the tooth height of the retaining teeth.
  • the retaining teeth of the clamping jaws are so small that they fit into the smallest depressions to be expected. Therefore, if the workpiece is made of a very ductile material and the depressions are rather large, they can grip into the depressions with some lateral play. However, due to the compressive force that the clamping surfaces of the clamping jaws exert on the workpiece surface and thus on the surroundings of each recess, the recesses can be narrowed again somewhat, so that the holding teeth ultimately grip into the recesses without play.
  • the embossing teeth of the embossing punch delimit a gap between each other, into which some workpiece material can flow during the embossing process.
  • the intermediate space preferably has a boundary following a cylinder contour.
  • the embossing teeth are preferably formed on a ledge projection of the embossing die. This ensures that no flat surface outside of the embossing teeth comes into contact with the workpiece surface during the embossing process.
  • the individual depressions can be surrounded by a more or less large annular elevation, depending on the workpiece ductility.
  • the workpiece surface can freely deform outside of the indentations. This is achieved by the coining force acting only and exclusively between the coining teeth and the workpiece.
  • the clamping device has at least one, preferably several clamping jaws, the workpiece clamping surface of which is provided with form-fitting elements which are arranged in the predetermined grid of the depressions, i.e. have a uniform center-to-center distance of 2.5 mm to 3.5 mm, preferably 3 mm.
  • the form-fit elements are preferably teeth whose shape is similar to the shape of the embossing teeth, the retaining teeth preferably being smaller than the embossing teeth. Therefore, in the case of less ductile materials, the size and shape of a recess can match the shape and size of a retaining tooth.
  • the depressions created by the embossing teeth can also be larger and deeper, so that the retaining teeth initially grasp into the depressions with a little play.
  • the retaining teeth (or other form-locking elements) are preferably less high than the deep depressions embossed in the workpiece.
  • some of the material displaced by the embossing teeth can flow back and ultimately enclose the holding teeth of the clamping device completely and preferably without gaps.
  • a planar contact between the workpiece clamping surface and the workpiece can be achieved. In this way, the form fit and the frictional fit are maximized.
  • Different embossing jaws with differently sized embossing teeth can be provided for different workpiece materials. Additionally or alternatively, different stamping forces can be used for different workpiece materials be used.
  • the embossing device can be designed in such a way that the embossing force can be adjusted accordingly.
  • a measuring or monitoring device can be provided which is set up to measure or monitor the depth of penetration of the embossing teeth into the workpiece.
  • the embossing device can be designed in such a way that it ends the embossing process when the desired depth of the depressions is reached.
  • the depth of the depressions is preferably between 0.2 mm and 2 mm.
  • the depth of the embossed depression is preferably 0.02 mm to 0.05 mm greater than the height of the retaining tooth.
  • Figure 1 illustrates a method for clamping workpieces 10.
  • deformations for example in the form of a series of depressions 12, have been applied to the workpiece 10, which is illustrated schematically and by way of example.
  • the clamping device 13 comprises at least one movable clamping jaw 14 and an abutment 15 assigned to this, which can also be designed as clamping jaws mirror-symmetrically to the clamping jaw 14.
  • Other abutments such as clamping jaws with smooth clamping surfaces, are also possible.
  • clamping jaw 14 applies accordingly to the present and all further exemplary embodiments, to the abutment 15 designed as clamping jaws or to further clamping jaws and abutments.
  • the clamping jaw 14 has a number of form-locking elements 16 which can have the shape of retaining teeth 17 which match the recesses 12 in terms of shape, position and size.
  • the holding teeth 17 are arranged, for example, in a straight row, which are arranged at a distance from a support surface 18 formed on the clamping jaw 14.
  • the retaining teeth can, however, also be arranged in a different pattern, for example in a zigzag row or in two or more rows.
  • the preferably flat support surface 18 is arranged at right angles to a clamping surface 19 from which the retaining teeth 17 protrude.
  • the clamping surface 19 is preferably a flat surface.
  • the retaining teeth 17 are preferably all of uniform design.
  • the depressions 12 and also the retaining teeth 17 are arranged in a matching grid R, which is shown in FIG Figure 1 is symbolically marked on the workpiece 10.
  • the grid R sets the center distances of the depressions 11 as well as the center distances of the retaining teeth 17 to a uniform value, which is between 2.5 mm and 3.5 mm.
  • the center-to-center spacing of the retaining teeth 17 and the depressions 12 in the razor R is preferably set at 3 mm.
  • the holding teeth 17 engage in the depressions 12 and the clamping surface 19 comes into contact with the workpiece surface 20 which surrounds the depressions 12.
  • the clamping surface 19 exerts a compressive force on the workpiece surface 20.
  • the holding teeth 17 are free of play in the depressions 12.
  • the workpiece 10 is thereby frictionally and positively clamped. Because of the small grid spacing of preferably 3 mm, this results in a quasi-continuous, form-fitting mounting of the workpiece 10 with low local force peaks.
  • the workpiece position is fixed parallel to the clamping jaws 14, 15.
  • Figure 2 illustrates part of a tool for forming the depressions 12 on the workpiece 10.
  • the depressions 12 are not part of the desired workpiece geometry, but are only used to clamp the workpiece 10. They are attached in a region of the workpiece 10 on the one selected in the Clamping no machining operations are required.
  • FIG 9 illustrates an embossing device 31 for producing the depressions 12 on the workpiece 10.
  • the Embossing device 31 preferably has two embossing dies 21, 21 ′, which can be moved and tensioned towards one another by means of a force generating device 30.
  • the force generating device is connected to the two embossing dies 21, 21 ′ and is set up to exert a controlled force on a workpiece 10 held between the two embossing dies 21, 21 ′.
  • the two stamps 21, 21 ' are preferably configured in the same way and arranged in mirror image to one another.
  • the stamping die 21 illustrated has a support surface 22 on which the workpiece 10 can be placed before an stamping process is carried out.
  • the support surface 22 can be a plane surface or a surface that is interrupted several times. It is also possible to dispense with such a support surface 22.
  • These recesses 24 preferably each follow a cylindrical surface and delimit the embossing teeth 25, which are arranged in the grid R, between one another. In other words, their center-to-center distances are set in the preferred grid of 2.5 mm to 3.5 mm and are, for example, uniformly 3 mm.
  • the bar 23 can otherwise be designed with parallel flanks or also wedge-shaped, i.e. tapering towards the tips of the embossing teeth 25 in a wedge-shaped manner.
  • the embossing teeth can also be designed to be rounded on these flanks.
  • Figure 3 illustrates the ratio of the size of the embossing teeth 25 to those in FIG
  • the embossing teeth 25 are only partially pressed into the material of the workpiece 10 during the embossing process, ie their respective height H (see FIG Figure 3 ) is greater than the depth T of the generated depressions 12.
  • the height H of the embossing teeth 25 can be based on an in Figure 3
  • the imaginary connecting line, shown in dashed lines, of the deepest points of the depressions 24 up to the tooth tip can be measured and, for example, be 3 mm.
  • the depth T of the recesses 12 then corresponds to the depth of penetration of the teeth.
  • the embossing dies 21 are preferably moved towards one another in a force-operated manner, the embossing process preferably being force-controlled, but at least being force-limited.
  • the depth T results from an interplay of the material ductility of the workpiece 10 and the stamping force applied.
  • path-controlled embossing processes which have a defined penetration depth, damage to the workpiece 10 is prevented.
  • the penetration depth of the embossing teeth can be measured during the embossing process. The penetration depth is the distance that the embossing jaws cover after the first contact of the workpiece with the face of the embossing teeth.
  • the embossing device can be set up to end the embossing process when the desired depth of penetration and thus the desired depth of the recess has been reached.
  • the depth T of the recess 12 is preferably at least slightly greater than the height of a retaining tooth 17. The difference can be, for example, 0.02 to 0.05 mm, if necessary also less or more.
  • Figure 4 illustrates the embossing process on a material that is easy to flow and therefore ductile, such as, for example ductile aluminum.
  • the embossing tooth 25 locally penetrates the workpiece surface 20, the material of the workpiece 10 evading the embossing tooth 25 and being deformed.
  • An influenced zone 26 is formed in which the material of the workpiece 10 can be compressed and also hardened by deformation.
  • a non-planar deformation of the workpiece surface 20 can form around the depression 12 generated, for example in the form of a wall-like bulge or elevation 27 or in some other slight elevation of the workpiece surface 20 against the penetration direction of the embossing tooth 25. This is in Figure 5 and 6th illustrated again in exaggeratedly exaggerated representation.
  • the cross section of the embossing tooth increases from its end face 25a towards its tooth base.
  • the penetration resistance of the embossing tooth increases disproportionately with increasing penetration depth.
  • the embossing teeth 25 have, like especially the Figures 2 and 6th can be seen, preferably two or four concavely rounded flanks 24a, 24b, so that the resistance of each embossing tooth 25 increases non-linearly with increasing penetration depth during the embossing process. That’s why when embossing various ductile materials, depressions with a depth T are reached, which in any case is sufficient to accommodate the retaining teeth 17. If the material is more ductile, the penetration depth is even greater. The variability of the depth T is, however, much less than the variability of the ductility of the various materials of the materials in question. In addition, the depth of penetration during embossing can be monitored and regulated to a target value.
  • Workpieces 10 can for example consist of aluminum, aluminum alloys, various other metals and metal alloys or plastic. It can be achieved by the rounding of the surface 24 that complete penetration of the embossing tooth 25 into the workpiece 10 is not to be expected even with soft materials.
  • the height h of a retaining tooth measured in the clamping direction S is preferably less than the depth T of the recess 12.
  • the wall-like elevation 27 is now at least partially leveled by the clamping surface 19, so that the material of the workpiece, in particular of the zone 26, is further deformed and fits tightly around the retaining tooth 17. The material can flow again, so that more can flow into Figure 7 in deformation areas 28, 29 shown hatched.
  • a large part of the clamping surface 20, preferably the entire clamping surface 20 and the outer surface (24a, 24b) of the holding teeth 17 is used as a surface that transmits holding force.
  • the material of the workpiece 10 is pretensioned against the flanks and, if necessary, also against the end face of the retaining teeth 17.
  • the depth of the recess 12 is so great that the end face of the retaining tooth 17 does not lie against the bottom of the recess 12 when the workpiece 10 is clamped (see FIG Figure 7 ).
  • the predetermined grid spacing of preferably 3 mm ensures that the influenced zones 26 of the various embossing teeth 25 in the workpiece 10 touch or overlap. This enables the workpiece 10 to be held in a quasi-continuous manner. Investigations show that both larger and smaller grid spacings lead to lower workpiece holding forces. Figure 8 illustrates this in a diagram. The ratio of the achievable holding force F and the available clamping surface A is plotted on the vertical axis (ordinate). In order to obtain comparable curves for different materials, the force F is standardized to the maximum holding force without holding teeth.
  • the grid dimension of the grid R is plotted on the horizontal axis (abscissa).
  • the grid dimension is the center-to-center distance of the embossing teeth 25 and at the same time the center-to-center distance of the depressions 12 as well as the center-to-center distance of the retaining teeth 17. It can be seen that the maximum achievable holding force F related to area A reaches a maximum at a grid dimension of 3 mm, with in Good holding force values can still be achieved in the range between 2.5 mm and 3.5 mm.
  • the decrease compared to the maximum holding force within this range is usually less than 30%, often less than 10%. This applies to almost all practically occurring at least somewhat ductile and thus stampable materials.
  • the holding force F is a force that acts perpendicular to the support surface 18 and thus tries to pull the workpiece 10 clamped between the clamping jaws 14, 15 out of the clamping jaws 14, 15 (in Figure 1 vertically up).
  • the embossing teeth and correspondingly also the holding teeth 17 can have essentially flat flanks, otherwise the previous description applies accordingly.
  • FIG 11 Another modification of the invention described above, according to which the workpiece 10 is held between four jaws 14, 15, 14a, 15a, each of which has retaining teeth 17 and for which the description of the clamping jaw 14 applies accordingly.
  • Clamping jaws 14, 15, 14a, 15a lying opposite each other are moved towards or away from each other by clamping drives and can thus clamp the workpiece 10 on four sides.
  • Figure 12 shows the clamping of a workpiece 10 'on a cylindrical section of the same by means of corresponding cylinder-shell-shaped, adapted clamping jaws 14, 14a, 15, the workpiece 10' as in all other embodiments of the invention prior to clamping in a preparatory work step has been provided with the necessary depressions, preferably by embossing.
  • a workpiece 10 is first provided with depressions 12, these being arranged, for example, in a row or in a field in a grid dimension of 3 mm grid width.
  • the grid dimension is measured as the center-to-center distance of the depressions 12, the depth T of which is preferably less than the length of the depression 12, measured in the direction of the row of depressions 12.
  • the distances between the depressions 12 preferably correspond approximately to the length of the depressions 12.
  • These recesses 12 are preferably formed with embossing tools which have embossing teeth 25 with rounded flanks 24a, 24b.
  • the flanks 24a, 24b are preferably rounded in a concave manner.
  • the embossing process is preferably carried out in such a way that raised areas 27 are formed between the depressions 12 which, when the workpiece 10 is clamped between clamping jaws 14, 15, come into contact first with its flat clamping surface 19. Deformation of these raised areas 27 during the clamping process increases the holding force.
  • the grid dimension of 2.5 mm to 3 mm has proven to be optimal for a wide range of usable workpieces and materials.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP20207248.4A 2019-11-28 2020-11-12 Procédé de serrage de pièces ainsi que dispositif d'estampage et dispositif de serrage Pending EP3875221A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019132276.6A DE102019132276A1 (de) 2019-11-28 2019-11-28 Verfahren zum Spannen von Werkstücken sowie Prägevorrichtung und Spannvorrichtung

Publications (1)

Publication Number Publication Date
EP3875221A1 true EP3875221A1 (fr) 2021-09-08

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Application Number Title Priority Date Filing Date
EP20207248.4A Pending EP3875221A1 (fr) 2019-11-28 2020-11-12 Procédé de serrage de pièces ainsi que dispositif d'estampage et dispositif de serrage

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US (1) US11697188B2 (fr)
EP (1) EP3875221A1 (fr)
DE (1) DE102019132276A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999052678A1 (fr) * 1998-04-11 1999-10-21 Lang Guenter Systeme et procede de serrage pour la fixation de pieces a usiner
DE102009052334A1 (de) 2008-11-12 2010-07-29 Erowa System Technologien Gmbh Verfahren zum Einspannen eines Werkstücks und zugehörige Spanneinrichtung
EP2724817B1 (fr) * 2012-10-26 2015-06-17 OML S.p.A. Mâchoire de serrage ou élément de serrage
DE102016224517A1 (de) * 2016-12-08 2018-06-14 Lang Technik Gmbh Prägestation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2838971A (en) * 1955-10-13 1958-06-17 Abraham J Shekter Face plates for vise jaws
BE649230A (fr) * 1963-06-12
US4655267A (en) 1986-04-07 1987-04-07 Lof Plastics Inc. Holder for embossing items of irregular cross-section

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999052678A1 (fr) * 1998-04-11 1999-10-21 Lang Guenter Systeme et procede de serrage pour la fixation de pieces a usiner
EP1071542B1 (fr) 1998-04-11 2002-05-29 Günter Lang Systeme et procede de serrage pour la fixation de pieces a usiner
DE102009052334A1 (de) 2008-11-12 2010-07-29 Erowa System Technologien Gmbh Verfahren zum Einspannen eines Werkstücks und zugehörige Spanneinrichtung
EP2724817B1 (fr) * 2012-10-26 2015-06-17 OML S.p.A. Mâchoire de serrage ou élément de serrage
DE102016224517A1 (de) * 2016-12-08 2018-06-14 Lang Technik Gmbh Prägestation

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US20210162567A1 (en) 2021-06-03
DE102019132276A1 (de) 2021-06-02
US11697188B2 (en) 2023-07-11

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