Method and device for compression moulding for shell-and-core element manufacturing of for vehicle body

FIELD: automotive engineering.

SUBSTANCE: in the first step, the moulded material is pressed against the punch by a pillow to raise the area corresponding to the formed flange at the ends of the groove element and the rib bottom in the direction opposite to the pressing direction. The end of the region to be moulded into the rib in the pressing direction is bent by the cushion, and at least a portion of the noted end is held. In this case, the intermediate article, in which the non-end zone in the region formed into the bottom of the grooved element is not retained, is moulded using a punch and a matrix.

EFFECT: reduced formation of cracks at the edge of the rib flange and formation of folds at the base of the rib flange.

17 cl, 14 dwg

 



 

Same patents:

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming, namely, to sheet stamping. Sheet blank is placed on dual- or triple-action press die including female die with working cavity, pressure surface and extractor, pressure plate and male die. Sheet blank edge is pressed by die pressure plate to female die pressure surface to pull sheet blank central part by male die into female die cavity along with deceleration of blank edge by pressure plate. At termination of drawing and start of male die exit from female die, compressed air is fed through male dire holes to semi-finished product sections, bonded via grease with male die surface and tightly abutting thereon, to uncouple said sections from male die surface to follow said male die. Or, at termination of drawing and female die and pressure plate upward stroke start, compressed air is forced via male die orifices to semi-finished product sections, bonded via grease with male die surface and tightly abutting thereon, to uncouple said sections from male die surface to follow said male die.

EFFECT: higher precision and quality.

2 cl, 2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to metallurgy. In compliance with first version, die comprises upper plate, lower plate with working cavity, pressure surface and extractor, pressure plate, and is mounted at double- or triple-action press. At least, two pneumatic extractors with pistons and rods are secured in lower die along its edges and opposite half-stock edge. Rods may extend from lower plate pressure surface to disconnect half-stock edge from lower die pressure surface when extractor starts moving up. In compliance with second version, die comprises male die, female die with working cavity and pressure surface, pressure plate and is mounted on double- or triple-action automatic press. At least, two pneumatic extractors with pistons and rods are secured in lower die along its edges and opposite semis edge. Rods may extend from lower plate pressure surface to disconnect half-stock edge from lower die pressure surface before withdrawing the half-stock.

EFFECT: higher quality and precision, reduced labor input.

2 cl, 2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to metallurgy. Blank is placed on double- or triple-action press die in compliance with first version, and on single-action press die or multistation automatic press in compliance with second version. Then, blank edge is clamped by die pressure plate to female die pressure surface. Then, blank is pulled by male die into female die working part and blank is braked by its edge clamped by pressure plate. Semi forming is terminated by withdrawing male die from female die and pressure plate from semi, or in some other way. After semi forming, pneumatic extractors arranged opposite blank edge are actuated. Rods of pneumatic extractors are withdrawn from female die pressure surface to disconnected semi edge therefrom and to extract semi from female die cavity.

EFFECT: higher precision ands quality.

2 cl, 2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming, particularly, to stamping, and may be used in drawing various parts from sheet materials. Proposed die comprises punch arranged on press inner slide, female die, blank holder, lifters and air release tubes. Die is equipped with pneumatic suction cups for retaining the blank elongated transition in die inner slide backstroke. Said pneumatic suction cups are fixed in female die slots at less stiff and stable areas of blank elongated transition. Lifters total force exceeds that pneumatic suction cups lifter stroke makes 30-35 thicknesses of initial blank.

EFFECT: higher surface precision and quality, better stiffness and bearing capacity.

2 cl, 4 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming, particularly, to stamping, and may be used in drawing various parts from sheet materials. Blank is placed in die composed of male and female dies, holder, pneumatic suction cups, lifters and air release tube. Then, blank peripheral part is clamped by female die and holder when die outer slide moves up. Then, male die strains the blank central part when die inner slide moves down. Die inner and outer slides are driven backward and upward to withdraw blank drawn part. During inner slide back stroke, blank elongated part is retained in female die by pneumatic suction cups. Said pneumatic suction cups are fixed in female die at most unstable zones of blank elongated part and driven by controller. Total force of lifters exceeds that of pneumatic suction cups.

EFFECT: higher surface precision and quality, better stiffness and bearing capacity.

2 cl, 4 dwg

FIELD: metallurgy.

SUBSTANCE: work piece cut of sheet material and preliminary bent is drawn in double action press in punch with travelling central part of matrix. During drawing the central part of matrix creates pressing force of the central part of a work piece with preliminary peripheral part of work piece pressing. According to the first version force of springs positioned under the central part of the matrix is set higher, than force of deformation of a part of the work piece located over this part of the matrix during whole process of work piece deformation. According to the second version force of springs positioned under the central part of the matrix is set lower, than force of deformation of the work piece part located under this part of the matrix during an initial stage of drawing and higher, than force of deformation of this work piece part during intermediate and final stage of drawing. According to the third version force of springs is set lower, than force of deformation of the work piece part positioned over the central part of the matrix during an initial and intermediate stages of drawing and higher, than force of deformation of this work piece part during a final stage of drawing.

EFFECT: reduced fatigue strength, corrosion resistance and accuracy of items, reduced waste of sheet material and labour input.

3 cl, 7 dwg

FIELD: metallurgy.

SUBSTANCE: proposed method comprises placing billet on duplex or triple press die, pressing biller flange and pulling billet central part in die cavity by punch. Two fixed thrusts with hooks are arranged on die surface and movable thrusts with hooks are mounted opposite the former. Billet is arranged in due with flexure. Billet is placed so that its edges slide on surfaces of aforesaid thrusts. Billet two opposite edges are located below hooks of fixed and movable thrusts to clamp the billet. Billet central is preliminary bent over cylindrical surface. Pre-bent billet is lowered inside die to be completely bent. Then bent billet flange is clamped and billet central part is pulled in. Stamp comprises punch, stamp slide, fixed lower plate, die and pressure plate. Also fixed thrusts with hooks and two movable thrusts with hooks. Lower die has developing pressure surface. Guide assies axes are located horizontally.

EFFECT: higher accuracy and efficiency, sheet metal input and costs.

2 cl, 1 dwg

FIELD: metallurgy.

SUBSTANCE: invention group relate to metal deformation process field, particularly to punching of panel detail. Additional part of form of panel material is extracted by extracting part of punch for punching for value which is equal or less than the limit up to which it can be extracted panel material by means of which part of panel material of the future product is roughly conform to shape-generating puncheon surface. In this condition part of panel material of the future product is stretched out or extracted. Accordingly cross-section of the part of the future product is evenly changed in minimal degree, that provides manufacturing by means of punching of wing panel, implemented of alloy on the basis of aluminium, which allows jumbo size on plane and high quality. Punch for punching allows keeping part and located in its internal side extracting part for extraction of additional part of panel material form.

EFFECT: it is increased flexibility during the construction of panel details.

6 cl, 10 dwg, 1 ex

FIELD: metallurgy.

SUBSTANCE: invention group relate to metal deformation process field, particularly to punching of panel detail. Additional part of form of panel material is extracted by extracting part of punch for punching for value which is equal or less than the limit up to which it can be extracted panel material by means of which part of panel material of the future product is roughly conform to shape-generating puncheon surface. In this condition part of panel material of the future product is stretched out or extracted. Accordingly cross-section of the part of the future product is evenly changed in minimal degree, that provides manufacturing by means of punching of wing panel, implemented of alloy on the basis of aluminium, which allows jumbo size on plane and high quality. Punch for punching allows keeping part and located in its internal side extracting part for extraction of additional part of panel material form.

EFFECT: it is increased flexibility during the construction of panel details.

6 cl, 10 dwg, 1 ex

FIELD: metallurgy.

SUBSTANCE: proposed method comprises placing billet on duplex or triple press die, pressing biller flange and pulling billet central part in die cavity by punch. Two fixed thrusts with hooks are arranged on die surface and movable thrusts with hooks are mounted opposite the former. Billet is arranged in due with flexure. Billet is placed so that its edges slide on surfaces of aforesaid thrusts. Billet two opposite edges are located below hooks of fixed and movable thrusts to clamp the billet. Billet central is preliminary bent over cylindrical surface. Pre-bent billet is lowered inside die to be completely bent. Then bent billet flange is clamped and billet central part is pulled in. Stamp comprises punch, stamp slide, fixed lower plate, die and pressure plate. Also fixed thrusts with hooks and two movable thrusts with hooks. Lower die has developing pressure surface. Guide assies axes are located horizontally.

EFFECT: higher accuracy and efficiency, sheet metal input and costs.

2 cl, 1 dwg

FIELD: metallurgy.

SUBSTANCE: work piece cut of sheet material and preliminary bent is drawn in double action press in punch with travelling central part of matrix. During drawing the central part of matrix creates pressing force of the central part of a work piece with preliminary peripheral part of work piece pressing. According to the first version force of springs positioned under the central part of the matrix is set higher, than force of deformation of a part of the work piece located over this part of the matrix during whole process of work piece deformation. According to the second version force of springs positioned under the central part of the matrix is set lower, than force of deformation of the work piece part located under this part of the matrix during an initial stage of drawing and higher, than force of deformation of this work piece part during intermediate and final stage of drawing. According to the third version force of springs is set lower, than force of deformation of the work piece part positioned over the central part of the matrix during an initial and intermediate stages of drawing and higher, than force of deformation of this work piece part during a final stage of drawing.

EFFECT: reduced fatigue strength, corrosion resistance and accuracy of items, reduced waste of sheet material and labour input.

3 cl, 7 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming, particularly, to stamping, and may be used in drawing various parts from sheet materials. Blank is placed in die composed of male and female dies, holder, pneumatic suction cups, lifters and air release tube. Then, blank peripheral part is clamped by female die and holder when die outer slide moves up. Then, male die strains the blank central part when die inner slide moves down. Die inner and outer slides are driven backward and upward to withdraw blank drawn part. During inner slide back stroke, blank elongated part is retained in female die by pneumatic suction cups. Said pneumatic suction cups are fixed in female die at most unstable zones of blank elongated part and driven by controller. Total force of lifters exceeds that of pneumatic suction cups.

EFFECT: higher surface precision and quality, better stiffness and bearing capacity.

2 cl, 4 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming, particularly, to stamping, and may be used in drawing various parts from sheet materials. Proposed die comprises punch arranged on press inner slide, female die, blank holder, lifters and air release tubes. Die is equipped with pneumatic suction cups for retaining the blank elongated transition in die inner slide backstroke. Said pneumatic suction cups are fixed in female die slots at less stiff and stable areas of blank elongated transition. Lifters total force exceeds that pneumatic suction cups lifter stroke makes 30-35 thicknesses of initial blank.

EFFECT: higher surface precision and quality, better stiffness and bearing capacity.

2 cl, 4 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to metallurgy. Blank is placed on double- or triple-action press die in compliance with first version, and on single-action press die or multistation automatic press in compliance with second version. Then, blank edge is clamped by die pressure plate to female die pressure surface. Then, blank is pulled by male die into female die working part and blank is braked by its edge clamped by pressure plate. Semi forming is terminated by withdrawing male die from female die and pressure plate from semi, or in some other way. After semi forming, pneumatic extractors arranged opposite blank edge are actuated. Rods of pneumatic extractors are withdrawn from female die pressure surface to disconnected semi edge therefrom and to extract semi from female die cavity.

EFFECT: higher precision ands quality.

2 cl, 2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to metallurgy. In compliance with first version, die comprises upper plate, lower plate with working cavity, pressure surface and extractor, pressure plate, and is mounted at double- or triple-action press. At least, two pneumatic extractors with pistons and rods are secured in lower die along its edges and opposite half-stock edge. Rods may extend from lower plate pressure surface to disconnect half-stock edge from lower die pressure surface when extractor starts moving up. In compliance with second version, die comprises male die, female die with working cavity and pressure surface, pressure plate and is mounted on double- or triple-action automatic press. At least, two pneumatic extractors with pistons and rods are secured in lower die along its edges and opposite semis edge. Rods may extend from lower plate pressure surface to disconnect half-stock edge from lower die pressure surface before withdrawing the half-stock.

EFFECT: higher quality and precision, reduced labor input.

2 cl, 2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming, namely, to sheet stamping. Sheet blank is placed on dual- or triple-action press die including female die with working cavity, pressure surface and extractor, pressure plate and male die. Sheet blank edge is pressed by die pressure plate to female die pressure surface to pull sheet blank central part by male die into female die cavity along with deceleration of blank edge by pressure plate. At termination of drawing and start of male die exit from female die, compressed air is fed through male dire holes to semi-finished product sections, bonded via grease with male die surface and tightly abutting thereon, to uncouple said sections from male die surface to follow said male die. Or, at termination of drawing and female die and pressure plate upward stroke start, compressed air is forced via male die orifices to semi-finished product sections, bonded via grease with male die surface and tightly abutting thereon, to uncouple said sections from male die surface to follow said male die.

EFFECT: higher precision and quality.

2 cl, 2 dwg

FIELD: metallurgy.

SUBSTANCE: as per the first version, a die is installed on a double-acting press. With that, pneumatic releasers with pistons and rods, which are located in a pressure plate along the perimeter opposite the end part of a semi-finished product, have a possibility of being retracted out of the pressure plate for the disconnection of the end part of the semi-finished product from the pressure plate at the beginning of the upward movement of the pressure plate. As per the second version, the die is installed on a single-acting press or an automatic multiple-point press, and pneumatic releasers with pistons and rods, which are located in the pressure plate along the perimeter opposite the end part of the semi-finished product, have a possibility of being retracted out of the pressure plate for the disconnection of the end part of the semi-finished product from the pressure plate at the beginning of the upward movement of the pressure plate.

EFFECT: improving the accuracy and quality of the front surface of drawn parts; improving their stiffness and load-carrying capacity.

2 cl, 2 dwg

FIELD: metal processing.

SUBSTANCE: invention relates to metal forming and can be used in part with lid-shaped transverse cross-section curvilinear profile making by pressing. During pressing forming metal material sheet is placed between female die and workpiece clamp, as well as between support element and male die and retained by means of said female die and clamp and support element and male die.

EFFECT: eliminating formation of cracks and folds.

10 cl, 21 dwg, 1 tbl

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