US3605528A - Incremental construction of three-dimensional objects having premachined rod elements and method for forming the same - Google Patents
Incremental construction of three-dimensional objects having premachined rod elements and method for forming the same Download PDFInfo
- Publication number
- US3605528A US3605528A US749685A US3605528DA US3605528A US 3605528 A US3605528 A US 3605528A US 749685 A US749685 A US 749685A US 3605528D A US3605528D A US 3605528DA US 3605528 A US3605528 A US 3605528A
- Authority
- US
- United States
- Prior art keywords
- rod
- die
- rods
- numerical
- data
- 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.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/24—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass dies
- B23P15/246—Laminated dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/20—Making tools by operations not covered by a single other subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/02—Moulds with adjustable parts specially for modifying at will the dimensions or form of the moulded article
- B28B7/025—Moulds with adjustable parts specially for modifying at will the dimensions or form of the moulded article the mould surface being made of or being supported by a plurality of small elements, e.g. to create double curvatures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/30—Mounting, exchanging or centering
- B29C33/301—Modular mould systems [MMS], i.e. moulds built up by stacking mould elements, e.g. plates, blocks, rods
- B29C33/302—Assembling a large number of mould elements to constitute one cavity
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/49—Nc machine tool, till multiple
- G05B2219/49004—Modeling, making, manufacturing model to control machine, cmm
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/49—Nc machine tool, till multiple
- G05B2219/49007—Making, forming 3-D object, model, surface
Definitions
- Our invention is related generally to the manufacture of three-dimensional objects, such as metal forming dies, although the teachings of our invention can be applied also to construction of other objects such as die casting dies, plastic molds and other objects of various geometry.
- the rods are precut to length using a numerically controlled cut-off machine, the ends of each of the rods forming surface increments that are optimally tangent to a curved surface contour of a precalibrated surface. The point of tangency between the incremental tangent surface and the curved surface is located at the rod center.
- An automated, numerically-controlled identification and assembly procedure makes it possible to identify individual rods and to position them in proper registry with the rod ends forming the equivalent of a rough-machined surface for a casting.
- the individual rods may be bonded together by brazing, diffusion brazing, adhesive bonding, chemical bonding or other bonding procedures to form a solid section.
- the section then can be nish machined to a required surface contour.
- the upper die section and the lower die section can be formed simultaneously.
- the basic procedure used during the numerically controlled rod cutting step produces registering elements of the upper and lower die sections, the matching ends of the twoy rods forming increments of the rough machined die surface equivalent for their respective die sections.
- the die surface angle formed during each angular cut for the rod for one die section is necessarily the proper die surface angle for the corresponding rod for the remaining complementary die section.
- the numerical definition of the finished die surface is determined with computer assisted data processing steps.
- the surface itself is normally defined initially in two dimensions on a surface layout, although other techniques have been used.
- a series of points on character lines and section lines on the two-dimensional surface draft is translated by interpolation into a mathematically continuous surface.
- a network of mathematically computed points in space can be obtained with sufiicient density so that the points define the finished surface in three dimensions.
- Tangent vectors for each of the points thus computed can be determined by partial differentials with reference to each of two coordinate planes. Having determined these vectors, a surface normal can be determined mathematically by using, for example, a cross-product method. It is this normal that determines the cutting angle for the die surface end of the rod and the point at which each normal is determined is made to correspond to a point lying on the axis of the individual rod. Where compound curvature precludes a unique common plane, the center is translated to assure sufficient machining stock. Similarly, the location of extreme angles, determined to be still in saw range, are adjusted for variations in saw kerf.
- the computed data is prepared with known data processing procedures and used to generate a control tape which is adapted for controlling a numerically-controlled cut-off machine.
- Intelligence stored in the tape includes data necessary to obtain the proper rod length for each of the individual rods, the die surface angle for each of the rod ends and the identification number for each rod. It is desirable to side-stripe the rods to assist in orientation during final assembly.
- Rods of different hardness may be used to provide variable wear resisting qualities in selected areas of the die surface if this is desired.
- preprocessing steps in the data processing procedure for preparing the control tape can be modified to include necessary instructions to provide material selection at the outset before the angular cuts are made.
- rods other than hexagonal rods For example, triangular rods, rods with trapezoidal cross sections or rods with cross sections in the shape of modified squares or parallelograms also may be used.
- the rods should have, however, a selforienting feature in order to permit a registry that establishes structural rigidity.
- a process drawing is prepared concurrently with the numerical processing of the panel surface. This includes all the lines necessary to describe the surface. Each line is given an identifying number on the drawing. The numbered lines on the drawing then are identified on a body draft, showing the surface in orthogonal representation. The lines necessary to describe the surface are superimposed on the body draft. All lines are digitized and used as raw input data for the computer assisted processing steps. The mathematical equations of the characteristic lines then are determined, which information is used to develop a matrix of points in space.
- Special regions of the die may be defined if this is necessary. For example, it may be necessary to use a stop-off material to prevent brazing or adhering of certain incremental rods at one location, but not at another. Also the rods may be required to be shortened at one location, or removed, or elongated. Different rod material in certain regions might be required.
- the line enclosing the region in question must be defined numerically, and the relationship of that line to the other character lines on the surface must 'be determined,
- Information regarding identification of the rods in certain regions must also be determined numerically. Such information must include instructions for slabbing or grooving of the corners of the rod or permanent numbering of the rods.
- a two-dimension grid of points representing the corners and centers of all the rods required to make up the incremental die is determined.
- the points on this grid then are projected onto the numerical denition of the die surface which already is determined, as explained above, thereby providing three-dimensional data and surface normal data.
- a reading head scans the identification of the individual rods and identifies the pieces of the rods. Odd numbered pieces are channeled in one direction, and even numbered pieces are channeled in another direction. This in effect separates the hex rod elements into complementary groups, which are the principal components of the punch half of the die sections and the principal components of the die half of the die sections.
- both the odd numbered pieces and the even numbered pieces are arranged in numerical order.
- This operation is automated under numerical control. If the numerical arrangement is interrupted by reason of a missing piece, a gap in the row .will appear and a signalling device will alert the operator so that the missing piece may be located and inserted in the gap, thus allowing a continuous iiow of rods. If necessary, a dummy piece may be inserted into the gap thereby allowing operation to continue. The dummy then can be replaced in an olf-line operation with an actual rod.
- the rods are assembled into a xture of special height, width, and depth to permit assembly of all the rods for the particular die half involved. All of the faces of the rods that are identified by slabbing are oriented in a common direction.
- the automated portion of the system may be a transfer line type of machine into which the raw material in the form of the hex bar stock can be introduced and fed through the several stations. Changes occur in this raw material in progressive stages, as explained above, as it is transferred from one station to the next. IIt finally emerges from the terminal end of the system as hex rod elements of varying dimensional characteristics.
- the processing that occurs at the servo stations is initated and controlled primarily through the use of numerical data, although this is supported by automatic cycling devices.
- the numerical data is the result of the merging of the process data required for the incremental die and the numerical representation of the die surface, as indicated in the schematic diagram of FIG. 1.
- FIG. 1 is a schematic diagram of the method steps used in making incremental metal forming dies.
- FIG. 2 is a plan view of an assembled incremental die.
- FIG. 3 is a cross section view taken along the plane of section line 3 3, FIG. 2.
- FIG. 4 is a cross sectional view taken along the plane of section line 4--4 of FIG. 2.
- FIG. 5 is an isometric, sectional view taken along the plane of section line y5---5 of FIG. 2.
- FIG. 6 is a cross sectional, geometric representation of a die surface formed by the ends of the rods. the ends being situated in planes that are tangent to the finished surface contour at the location of the rod center d lines. It is taken along the plane of section 6-6 of FIG. 8.
- FIG. 7 is a cross sectional fview of cooperating upper and lower die sections of a metal forming die, the plane of the section being parallel to the center lines of the incremental rods.
- FIG. 8 is a partial plan View of the incremental rods of FIG. 7 as seen from the plane of section line 8 8 of FIG. 7.
- FIGS. 9A, 9B and 9C is a process flow chart showing the method for constructing a numerically-controlled, incremental, rough-machined casting equivalent.
- FIG. 10 shows a typical machine base made in a form of a hexagonal rod construction.
- FIG. l1 is an automotive fender stamped from a die of the type illustrated in FIG. 7.
- FIGS. 2, 3, 4 and 5 we have illustrated one of two die sections for forming sheet metal.
- the die section has a cooperating die surface in the form of a concavity.
- the cooperating die section would have a convex die surface that would register with the concavity of the die section of FIG. 2.
- Numeral 10 designates in FIG. 2 a die housing, which may be in the form of a steel box.
- the housing may be of any shape desired although in the FIG. 2 embodiment it is square.
- each rod is cut to form an upper surface, such as that shown at 14, which generally cooperates with an adjacent end surface of the adjacent hexagonal rod.
- the surfaces directly adjacent surface 17 are designated by reference characters 16, 18, 20 and 22 in FIG. 5.
- the height of each rod as well as the angularity of the end surfaces are chosen so that each individual surface forms an increment of a larger surface having a contour that approximates the contour of the desired iinished die surface.
- the row of hexagonal rods directly adjacent the vertical walls of the housing 10 defines a pilot ridge 24 which extends around the periphery of the die section.
- Each individual rod is formed with a segment of the ridge 24 so that when the individual segments are joined side-by-side they dene the peripheral ridge 24.
- This ridge registers with a peripheral groove in the registering die section so that the die sections are piloted, one with respect to the other, into perfect registry.
- each rod 12 When the die sections are brought together into registry, eac'h increment end surface of each rod 12 registers with a cooperating end surface of a companion rod for the other die section.
- FIG. 7 We have shown in cross section form a pair of die sections, each having a die surface that registers with the die surface of its companion section.
- the space betweenithe companion end surfaces of the upper and lower rod segments of the upper die section 27 and lower die section 29 is occupied by the sheet metal 25.
- the die sections shown in FIG. 7 have been finish machined to provide continuous, smooth, die surfaces.
- This machining process employs numerically-controlled, multiple-axis, milling machines in a manner described in copending application Ser. No. 577,997, tiled Sept. 8, 1966, which is assigned to the assignee of this invention. Reference may -be had to application Ser. No. 577,997 for the purpose of supplementing this disclosure.
- each end of the hexagonal rods forms an end surface that is tangent to the die surface contour at a point that falls on the center line of the rod itself.
- the individual rods 12 include surfaces 26, 2S and 3f) which form tangent planes for the die surface contour shown at 32.
- the points of tangency for the surfaces 26, 28 and 30 coincide with the points of intersection of the center lines 34, 36 and 38 for the rods 12 with the nished die surface 32.
- the region between the surface 32 shown in FIG. 6 and the individual tangent planes provided by the surfaces 26, 28 and 3() ⁇ represents excess metal that is removed during the finish machining operation.
- the tangent planes themselves approximate the contour 32 after the rods are assembled in registry. This is the equivalent of a rough-machined casting of the die section.
- the surface designated by reference character 32 in FIG. 6 should correspond to the mathematically determined surface defined by the computed points in space described in the preamble portion of this specification. Suitable dowlines, or proportionately defined lines on the surface 32 can be computed by mathematically interpolating appropriate points on the specified surface.
- the tangent vectors at any point along the surface to be machined can be determined readily by the expedient of determining a partial derivative of the equation of a line of intersection between the computed surface contour and a plane parallel to one of the coordinate planes. Another tangent vector containing that same point can be determined with respect to another coordinate plane. Having these two tangent vectors, it is possible to obtain the unit normal vector. The center of the cutting tool can be adjusted accordingly along the unit normal vector so that the cutting tool itself always machines a tangent plane at any given point on the computed surface.
- the machine control may include an automatic parabolic interpolator that requires the simultaneous definition of the three coordinates of the points. Having rethe three coordinates of selected points in its control systern, the milling cutter, several of which are known in the industry, will direct the cutting tool to machine the surface 32 through the three points along a parabolic arc rather than along straight line segments between the points.
- This unit normal vector can be used also with modified computer subroutines to determine the normals for the incremental end surfaces of the rod which in turn determine the angle of the cutting tool that cuts the individual rod segments and the angular position of the rods during the cutting operation.
- FIGS. 9A, 9B and 9C we have shown a process flow chart for various machining operations and the assembly procedures necessary to convert hexagonal bar stock into a finished pair of matching die sections for working sheet metal.
- the chart should be read from left to right.
- the various process steps have been indicated in the upper portion of the view of FIGS. 9A, 9B and 9C; and the corresponding functions have been illustrated in the sketches in lower portion.
- the sketches and the method steps of the block diagram have been related by corresponding numbers.
- the assembly procedure has been divided into 13 stages, each stage being identified by a Roman numeral character. Between each of the stages the nal product of the previous stage is transfeired and reloaded for entry into the next stage, which may take place at a different physical location.
- a turret capable of accommodating hexagonal rods is loaded. If the particular die under consideration requires areas of varying hardness, rods otv varying hardness are entered at this Stage. Rods of differing alloy content also may be used. Automatic feeders can be provided for feeding the hexagonal rod stock to the turret. A preprogrammed control tape is provided with information which will cause the numerical control system to command the exact angular adjustment of the turret that will permit proper material selection as designated in the sketch of step I. After the turret position is Stich that a proper material is conditioned for advancement through the turret, the rod is advanced against a xed stop.
- a cutting tool moves across the plane of the raw bar stock as indicated in step number 4 for stage I.
- a tail stock which is situated in alignment with the turret, then is adjusted to a proper X- axis position. The amount of the adjustment depends on the preprogrammed instruction that is provided to the control system by the programmed tape.
- Each rod of course, will have its discrete position determined at step 5. It is different for each rod, unless, of course, the die section required rods of constant length.
- the bar cut in step 4 is fed into the tail stock as indicated in step 6. At that time the rod is cut to length by a cut-off tool as indicated in step 7.
- the cut rod now becomes an inprocess hex rod whose length represents the adjusted, computed length resulting from the computer program.
- the cut rod is transferred and loaded into a fixture to permit milling cutters, operating in tandem, to form a flat on one side of the hex rod.
- the rod is clamped and fed into a stop to establish a suitable position for one of the milling cutters.
- the other milling cutter is adjustable in 'the direction of the X-axis indicated in stage II, the amount of the adjustment depending upon theilength of the rod involved.
- the milling cutter adjustment is necessary to accommodate varying lengths of rods, and it is made in response to computed data.
- the machined flats provide a convenient area for impression stamping an identification number at each end of the rod such that the metal raised around the characters will be below the original surface of the material where it will not cause interference preventing surface-to-surface contact of the rods after assembly.
- the machined rod then is transferred again and loaded into another fixture as indicated in stage III. Identifying binary codes are punched on the flats that are machined in stage II. This code identifies a rod so that it can be assembled in its proper registry with the adjacent rods in the final assembly.
- the bar is automatically positioned against an end stop and clamped.
- One marking head is fixed and the other is adjustable in response to the Command of the numerical control system to accommodate the spread between the flats previously machined.
- the identifying numbers are consecutive from end to end and progressive from rod to rod.
- the ends of the rods are chamfered by chamfering tools that are advanced into the rod along the rod axis as indicated in step 2 of stage III.
- the chamfering operation can be automated. It does not require instructions from the numerical control tape. Further, each of the transfer and loading operations can be fully automated independently of the numerical data in the control tape.
- stage I The selection of the material in stage I and the positioning of the tail stock to a discrete length in stage I also requires instructions from numerical control tape, although the other functions in stage I can be fully automated independently of the numerical data. It is considered practical operation to establish groups of similar length bars during the previous computation to simplify this operation. Alternatively, maximum yield from standand bar lengths could be obtained by optimized grouping.
- the chamfered and milled rod then is transferred and loaded into a preoriented collet indicated in stage IV.
- the collet is oriented about the A axis is response to numerical control data since it must be capable of receiving a rod in its proper angular position with reference to the position orienting reference angle that accounts for the position of the milled flat ends.
- the proper flat can be machined at this stage. This is done by feeding the rod through the preoriented collet into the path of motion of a milling cutter, the X-axis position of which is determined by numerical data in addition to the X-axis position of the cutter, it is necessary to properly orient the angular position of the rod prior to the machining. This is indicated in the step 2 in stage IV. This adjustment also occurs in response to numerical control instructions provided by the control tape.
- Milling may be needed, for example, when it is desired to provide an axial passage in the finished die to permit entry of a temperature controlling media or lubricant, or to provide desired discontinuities in the surface.
- the machined rod then is transferred to an automated transfer and load device and received by a preoriented collet in stage V.
- the angular position of the collet is determined with numerical data.
- a cutter blade in the cut-off machine is adjusted as indicated in step 2 in stage V to a proper angle 0, with respect to the center line of the rod.
- the rod then is adjusted in the X-axis direction as indicated in step 3 of stage V.
- This stage requires feeding of the rod through the preoriented collet shown in step 1 of stage V until it engages a stop, and then determining the angular position of the blade and the X-axis position of the rod.
- the rod is cut as indicated in step 4.
- the cutting itself can be fully automated, although the angular positioning of the blade, the X-axis adjustment of the rod and the angular orientation of the collet each require instructions in the form of numerical data.
- the cut pieces are transferred through an automated transfer and loading device and received by appropriate mounting fixtures at stage VI where an automated wire brushing operation removes flash and burrs from the cut edges of the rods.
- an automated wire brushing operation removes flash and burrs from the cut edges of the rods.
- the rods also may be grit blasted if required.
- the grit blast and the degreasing steps can be fully automated steps, but the copper spray step requires numerical data instructions since under some circumstances it might be desired to apply stop-off material instead of the spray copper. This is desired if a copper braze for that rod is to be avoided. For example, if an opening is desired in the nished surface contour at the location normally occupied by a particular rod, that rod may be withdrawn if it is not bonded to its adjacent rods.
- the rods then are transferred to a station which will permit orientation of the rods with a scanner operation whereby the identification numbers on the rod ends can be read by a reading head. This occurs, as indicated, in stage X.
- the rods then are separated into odd and even numbers and are arranged in numerical sequence.
- the odd numbered rods are arranged in an assembly that defines one die section, and the even numbered rods are assembled to form the other die section.
- the assembled rods are indicated in stage XIII.
- the assembled rods of FIG. 9C correspond to the assembly indicated in FIGS. 2, 3, 4 and 5.
- a numerical representation of the die surface is one ingredient of the numerical data required by the numerical system that controls the various process steps.
- the numerical system also requires process data necessary to adapt the numerical system for an incremental die program. That includes information derived from the surface normals described with reference to the points in space that define the die surface,l which information is used to establish the cutter angle in stage V as well as the orientation of the collet in stage V which holds the rod during the cutting operation.
- the added process data must be sufficient to enable the cut-off machine to locate the proper X-axis adjustment for the rod parts.
- the output data for the system is derived after the two process data inputs are integrated.
- the output data is used to perform the various functions indicated by the legends in FIG. l.
- a method for making a rough machined casting equivalent comprising steps of assembling one or more rods into a work piece handling fixture, adjusting the axial position of each rod with respect to a stop, cutting said rod to a predetermined length, identifying each rod by code notations, mounting said rods in a work holding fix* ture, adjusting each rod with respect to a fixed reference point in the direction of its axis, adjusting the angular position of said rod about its axis, cutting said rod into two segments to form two complementary end surfaces having la common direction for their respective normal vectors, repeating the foregoing steps with a plurality of other pieces of bar stock of predetermined length and material, separating the rod sections cut from stock into separate groups, and assembling together the rod sections of each group into registry with a coded side of each segment oriented in a common direction whereby the cut ends of said rods are contiguous with respect to each other and define an
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
- Forging (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US74968568A | 1968-08-02 | 1968-08-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3605528A true US3605528A (en) | 1971-09-20 |
Family
ID=25014742
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US749685A Expired - Lifetime US3605528A (en) | 1968-08-02 | 1968-08-02 | Incremental construction of three-dimensional objects having premachined rod elements and method for forming the same |
Country Status (6)
Country | Link |
---|---|
US (1) | US3605528A (de) |
BE (1) | BE736973A (de) |
CA (1) | CA917967A (de) |
DE (2) | DE6923221U (de) |
FR (1) | FR2014921A1 (de) |
GB (1) | GB1234005A (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3860803A (en) * | 1970-08-24 | 1975-01-14 | Diecomp Inc | Automatic method and apparatus for fabricating progressive dies |
US3889876A (en) * | 1972-09-29 | 1975-06-17 | Diecomp Inc | Apparatus and method for automatic splitting of die cavities |
DE3240951A1 (de) * | 1981-11-07 | 1983-05-19 | Inoue-Japax Research Inc., Yokohama, Kanagawa | Formbildungsverfahren und rohform zu seiner durchfuehrung |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK126976A (da) * | 1976-03-23 | 1977-09-24 | Berthou Knud Vilhelm | Verktoj til formgivning af plademateriale |
FR2501578B1 (fr) * | 1981-03-11 | 1987-09-04 | Desport Lucien | Structure d'un materiau de type sandwich, procede et machine de fabrication dudit materiau |
DE3240005A1 (de) * | 1981-10-30 | 1983-05-05 | Ustav pro výzkum motorových vozidel, Praha | Koerper von allgemeiner form und verfahren zu seiner herstellung |
JP2584379B2 (ja) * | 1991-12-13 | 1997-02-26 | 株式会社小糸製作所 | 魚眼ステップの金型作製方法 |
DE4409556A1 (de) * | 1994-03-19 | 1995-09-21 | Blz Bayrisches Laserzentrum Ge | Biegewerkzeug, insbesondere für das Gesenkbiegen |
-
1968
- 1968-08-02 US US749685A patent/US3605528A/en not_active Expired - Lifetime
-
1969
- 1969-05-15 CA CA051601A patent/CA917967A/en not_active Expired
- 1969-06-11 DE DE6923221U patent/DE6923221U/de not_active Expired
- 1969-06-11 DE DE1929539A patent/DE1929539C3/de not_active Expired
- 1969-07-21 GB GB1234005D patent/GB1234005A/en not_active Expired
- 1969-07-29 FR FR6925866A patent/FR2014921A1/fr not_active Withdrawn
- 1969-08-01 BE BE736973D patent/BE736973A/xx unknown
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3860803A (en) * | 1970-08-24 | 1975-01-14 | Diecomp Inc | Automatic method and apparatus for fabricating progressive dies |
US3889876A (en) * | 1972-09-29 | 1975-06-17 | Diecomp Inc | Apparatus and method for automatic splitting of die cavities |
DE3240951A1 (de) * | 1981-11-07 | 1983-05-19 | Inoue-Japax Research Inc., Yokohama, Kanagawa | Formbildungsverfahren und rohform zu seiner durchfuehrung |
Also Published As
Publication number | Publication date |
---|---|
DE6923221U (de) | 1970-07-16 |
BE736973A (de) | 1970-01-16 |
DE1929539C3 (de) | 1979-02-01 |
DE1929539A1 (de) | 1970-02-19 |
CA917967A (en) | 1973-01-02 |
DE1929539B2 (de) | 1978-06-15 |
FR2014921A1 (de) | 1970-04-24 |
GB1234005A (de) | 1971-06-03 |
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