Showing papers on "Stamping published in 1995"

Integrating feature-based surface design with freeform deformation

Abstract: A feature-based procedural method has been presented for designing a smooth surface that can be explicitly described as the graph of a single-valued bivariate function z = f(x, y) Such surfaces often occur in practice in manufacturing involving stamping or injection moulding operations (for example in car inner panels, brackets, beer cans, and electronic consumer products) Operationally, the design approach entails modifying the shape of an existing surface by sequentially adding arbitrarily shaped protrusions and pockets to it Sederberg and Parry proposed a versatile technique for deforming existing geometric objects in a freeform manner Their technique turned on the use of trivariate, parametric Bernstein polynomials, and it can be applied either locally or globally Unlike the author's feature-based method, in which the design process is carried out by direct manipulation of the surface model, freeform deformation is independent of the geometric model being deformed The paper presents results that combine the feature-based and freeform deformation design techniques into one 2-stage cad design approach Although nothing that is technically new is offered in either of the individual stages, the paper illustrates how this integration produces significant value in practical industrial surface design by combining the advantages offered by each method These include the intuitive, fast, easily modifiable feature-based design of complicated surfaces (that need not be graphs of a function), and the ability to make substantial, predictable and physically meaningful changes in surface geometry by the manipulation of shaping parameters (feature parameters and control points) The author's experience with the design of multifeature automotive sheet metal panels indicates that combining the two cad methods allows parts to be designed that cannot be designed using either method alone

Automated dimpling apparatus

Abstract: An apparatus is disclosed having one or more punching or stamping tools and a corresponding number of support tools for mating with each punching or stamping tool. The apparatus is adapted to form dimples, impressions, cuts, apertures or otherwise similarly modify the surface of a sheet metal blank, and in which the punching and support tools are both movably provided along a supporting structure formed from two elongated and parallel spaced beam members. Each beam member supports one of the punching tool, or stamping tool, and the support tool in a spaced relationship whereby the tools may be aligned and activated in punching or stamping operation to punch or stamp a portion of a blank positioned therebetween. A conveyer is provided to move the blank between the tools so that the portion of the blank to be modified is moved to a position intersecting the path of movement of the punching or stamping tool and the supporting tool. The advancement of the blank on the conveyor and/or the movement of the punching or stamping tool and the support tool along the supporting structure is controlled so that dimples, apertures, and the like may be formed at any desired portion of the blank.

Article constituted from a plate produced from a relatively soft metal and cooking vessel constituting such an article

Abstract: The article is constituted from a plate produced from a relatively soft first metal (1). It has, on one of its faces, a metallic element (2) in the form of a perforated sheet or a grid produced from a second metal or alloy harder than that of the plate (1). The metallic element (2) is fixed to the plate by drop-forging or stamping in order to embed it, at least partially, in this plate. The article is especially useful as a cooking vessel.

Stamping foil, in particular a hot stamping foil with decorative or security elements

Abstract: There is disclosed a hot stamping foil assembly, in particular a hot stamping foil, which has spatial decorative or security elements formed in a region-wise manner. An adhesive layer is provided only in a region-wise manner and in matching relationship with respect to the spatial elements to effect transfer of the spatial decorative or security elements or other decorative layer structure.

Ceramic microstructures and potential applications

Abstract: The developed process of tape casting with subsequent stamping is a promising way to make three-dimensional ceramic microstructures. Examples of different ceramic materials illustrate, that a good quality of the moulding with high form fit can be attained after optimisation of the slurry and the stamping process. The sintered microstructures are characterised by lateral dimensions in the micron range and high aspect ratios. The unique properties of ceramic materials in combination with this new process can be used to produce microstructured ultrasonic transducers or micro heat exchangers/reactors.

Spur gear precision die stamping-push-press forming process and its equipment

Abstract: A solid cylindrical steel blank is heated to forging temp. and is placed on a friction press, and all gear teelh of the spur gear can be forged by one hammering, and then the above-mentioned material is passed through the processes of annealing and removing scale, and on the tooth-surface, there is a small quantity of metal allowance, and then it is passed through such processes of cold-pressing and finishing on a hydraulic press, and the metal allowance of the tooth-surface is extruded to the tooth-end, so that the tooth-surface has no need of cutting machining, and all the gear teeth can be finally formed. The devices implementing the precison forging and cold pressing procedures are respectively new cylindrical gear precision forging and pressing dies.

Method for making a cooking vessel

Abstract: The article is constituted from a plate produced from a relatively soft first metal (1). It has, on one of its faces, a metallic element (2) in the form of a perforated sheet or a grid produced from a second metal or alloy harder than that of the plate (1). The metallic element (2) is fixed to the plate by drop-forging or stamping in order to embed it, at least partially, in this plate. The article is especially useful as a cooking vessel.

Self-leveling die platen for die stamping presses

Abstract: A self-leveling die platen assembly (32) is provided which includes a shiftable platen (78) which can rock as necessary to accommodate the configuration of a cooperating platen assembly (30). Preferably, the assembly (32) includes a stationary die shoe (46) provided with a fluid reservoir (50); a piston (68) is rockably received within reservoir (50) and supports the platen (78). During stamping or cutting operations, the platen (78) can thus move and self-adjust as necessary to accommodate the configuration of cooperating platen assembly (30). The self-adjusting assembly (32) greatly facilitates makeready operations.

Connector housing for contact set from punched grating

Abstract: The invention relates to an adapter for a plug-in connector and to the plug-in connector overall. The adaptor is produced by stamping out a lattice 10 from a flat metal sheet and bending over arms of the lattice to produce plug contacts 28, 30.

Method for fixturing abutted sheet metal parts for welding

Abstract: A method and apparatus for positioning and holding a pair of sheet metal blanks to be butt welded into a compound blank for stamping a larger panel with varying thicknesses. A fixture plate is provided with locating corners matching predetermined reference corners of the blank and with mechanisms for pushing the blanks into the locating corners. The first blank is pushed into abutment with stops that are then pivoted out of the way, after the first blank is clamped in place. The second blank is then abutted with the already clamped first blank, and clamped. The loaded fixture is then transported to a weld station, where the pre positioned blanks can be quickly and efficiently laser welded.

Liquid impact tool forming mold

Abstract: A metal tube is cold formed into a stamped member by tube is cold formed into a stamped member by sealing a tube containing liquid at approximately atmospheric pressure and then stamping the liquid-filled tube in a die. The pressure within the tube increases during the stamping step to force the walls of the tube to conform to the die cavity, eliminating the need to pressurize the tube prior or subsequent to stamping.

Stamping carton blanks from card

Abstract: The device for stamping carton blanks from card comprises an upper positive element (1) and a lower negative element (3). The upper element consists of a frame with the blanking and chamfering knife (2) attached to it by retaining and adjustment screws (9). The lower element consists of a metal plate. Lugs (11,12,13) are provided for the positioning of the upper and lower elements. The positioning lugs are made in such a way as to be adjustable by hand operated elements (15,16,17). If required the adjustment can be done automatically by a motor.

Apparatus for producing filled food products

Abstract: A method for increasing efficiency in a co-extrusion process for producing filled food products. The prior art co-extrusion process included a co-extrusion die for extruding an elongated cylindrical filled food shell which contains a filler material. A conveyor was used to advance the extruded filled food shell from the co-extruder along a predetermined path. A rotary stamping disk partitioned the cylindrical filled food shell into filled food segments. The present method includes providing multiple co-extrusion dies with parallel aligned outlets extruding a plurality of parallel elongated cylindrical filled food shells containing a filler material along the predetermined path. The rotary stamping disk has at least one circumferential row of stamping dies for each of the plurality of cylindrical filled food shells, such that the circumferential rows of stamping dies on the rotary stamping disk partition the plurality of cylindrical filled food shells into a plurality of rows of filled food segments.

Stencil stamp assembly

Abstract: A stencil stamp assembly embodying the invention has a comparatively small size, high ink holding capacity, excellent stamping durability and is capable of stamping images having a high print quality. The stencil stamp includes a handgrip (2) and a stencil stamp assembly (4). The stencil stamp assembly includes an ink bearing member (27) covered with a thermal stencil sheet (28). The thermal stencil sheet has a plurality of pores on holes arranged in a pattern. During a stamping action, ink from the ink bearing member is forced through the pores in the stencil sheet and onto a recording sheet to form a stamped image on the recording sheet. The ink bearing member has at least two layers (27A;27B) having difference densities. The less dense layer is in contact with the thermal stencil sheet. The least dense layer provides a large ink storage capacity. The more dense layer has a higher ink holding capacity, which reduces the potential for ink leakage. The more dense layer is also more firm, which reduces creasing and distortion of the stencil sheet both during stamping and during formation of the pore pattern in the stencil sheet.

Methodology for forming stamped sheet metal parts of complex configuration

Abstract: A method and apparatus for forming sheet metal parts of complex configuration and/or sheet metal parts including inherent joints. The part is formed in a continuous run through a stamping press wherein a strip of sheet metal is moved incrementally and continuously through a plurality of successive stations where a plurality of hits are made on the sheet to successively cut and form the sheet to gradually form the individual stamped parts. A special compound die is disclosed for forming a complete loop in each part during the run through the stamping press and for forming a doubled over portion of the part including upper and lower layers, and a clinching station is provided as a station within the stamping press for mechanically joining the doubled over layers of the part together to form a successive plurality of separate parts each having a doubled over portion clinched together.

Post hot working process for semiconductors

Abstract: A post-hot metal deposition process applied to semiconductor wafer manufacturing in order to increase the size of grain structures and improve electromigration resistance in semiconductor devices. A highly ductile metal is first deposited onto a semiconductor substrate having contact points in a partial vacuum. A forge is applied to the substrate--with the highly ductile metal deposited thereon, to form a smooth conductive surface on the substrate, even at the contact points. The forging is done at an appropriate pressure and temperature to perform hot-working of the metal onto the contact points of the substrate. The forge may be used to emboss a conductor image of the highly ductile metal deposited on the substrate. The forging process may be performed by either stamping a surface onto the substrate or by rolling a surface onto the substrate.

Multi-function die for stamping broad thin sheet

Abstract: The utility model relates to a multifunctional large-sized stamping die for thin plates. The height adjustment column of a sliding die body with a lower pressing side, a side cutter, a side folding device, a driving device, a partial punching device, etc., are added on the basis of the existing stamping die for thin plates. The bad phenomena of becoming thinner by pulling, penetrating by pulling, etc., in stamping can not generated. The new functions of cutting side, folding side, and partially punching are added. The utility model is the multifunctional large-sized stamping die for thin plates, which not only can ensure the punching quality, but also can save the operation time, and can reduce the trouble. The utility model can be used for the automobile industry and any other industry.

Plastic hose with a colored and/or metallized surface

Abstract: The invention relates to a plastic hose with a coloring and/or metallization on its surface, which is produced by stamping on a hot stamping film, as well as to a process for the production thereof. As a result of the hot stamping full-surface colored or metallized surfaces can be created for plastic hoses.

Surface asperity flattening in sheet metal forming — A 3-D relocation stylus profilometric study

Abstract: Among the laser textured steel sheets retained for difficult stamping situations those with isolated, non communicating valleys are shown to be especially interesting. Such isolated valleys act simultaneously as traps for wear debris and as practically frictionless, high pressure oil pockets, participating in overall load carrying. These results are substantiated by 3D profilometry before and after friction to analyse specific residual roughness and friction-induced surface damage on the load carrying plateaux.

Lead frame and its manufacture as well as semiconductor device using it

Abstract: PURPOSE:To provide a lead frame and its manufacturing method which are rich in mass productivity and in which a sure contact property with a molding resin can be obtained in the lead frame used for a semiconductor device and to provide a semiconductor device using it. CONSTITUTION:A protrusion 14 is formed in the halfway part of the inner wall 12a of a dimple 13. A stamping operation is conducted two times, a lower hole is made in a first stamping operation, a metal material at the peripheral edge part of an opening part 300 is pressurized in a second stamping operation so as to flow to the inside, and a lead frame can be manufactured.