Classifications

• • 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
  • B21D19/00—Flanging or other edge treatment, e.g. of tubes
  • B21D19/02—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge
  • B21D19/04—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers
• • 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
  • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
  • B21D22/14—Spinning
  • B21D22/16—Spinning over shaping mandrels or formers
• • 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
  • B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
  • B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
  • B21D35/008—Processes combined with methods covered by groups B21D1/00 - B21D31/00 involving vibration, e.g. ultrasonic
• • 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
  • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
  • B21D39/02—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder
  • B21D39/021—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder for panels, e.g. vehicle doors
  • B21D39/023—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder for panels, e.g. vehicle doors using rollers

Definitions

• the subject of the invention is a method for hemming of metal sheet products, especially thick ones, and a unit for hemming of metal sheet products, especially thick ones, which is used especially for manufacturing from thick sheeting, with a thickness of over 5 mm, of spatial products with a circular outline with an envelope collar, which form bottoms, covering elements and others.
• a unit for hemming of the body of a tin using at least one hemming tool is known, presented in a PL 183384 patent description, where the internal part is placed on a shaft rotating around its axis and a cooperating tool placed coaxially to the axis.
• a unit and a method for shaping of spherical bowls are known, presented in a PL 384299 patent claim.
• a disc of a metal sheet placed on a rotating shield is passed between two forming tools which shape its surface.
• a method and device for hemming of metal cylindrical surfaces, especially rings for boxes is known from a patent description PL 173806, where on the shaped surface a shaping head is placed, where the head and the treated surface rotate in relation to each other.
• a force is exerted in the radial direction to the direction of required shaping of axial force.
• This vessel is constructed using a roller profiling method, using a bottom tool, which rotates around its axis, whereas the shaping surface of the bottom tool is constructed in such a manner, as to be compatible with the external surface of the vessel thus created, and using an upper tool, which rotates around its axis, whereas the surface of the upper tool has a shape which corresponds to the shape of the internal surface of the vessel.
• a unit is known from the description US 5121621, which has a holder with multiple rollers installed on a rotating shaft, said rollers profiled to hem the edges, towards which the tin is pushed with its edge.
• a cylindrical surface of an inner stationary casing is provided in order to limit the hemmed edge of the tin body.
• the essence of the invention which is a method for hemming of metal sheet products, especially thick ones, by placing a metal sheet item with a circular cross-section between a stencil and a blank holder and the action over the circumferential zone of the treated item with the shaping tool during the rotation of the stencil with the blank holder consists of the treated item rotating with the stencil and the blank holder with a rotation speed lower than 10 rpm, and a tool in the shape of a roller with a concave shape acts on the edge of the treated item, whereas the tool acts on the edge of the item with a frequency of (10 to 50) Hz and an amplitude of (2 - 6) mm, and moves towards the axis of rotation in relation to the edge, with the feed of (0.08 - 0.15) mm per rotation. It was advantageous, when after the treatment process the treated item makes additionally at least one rotation with an immobilised shaping roll.
• This method is implemented in a unit in accordance with the invention for hemming of thick metal sheeting, having a stencil, mounted on a spindle placed in a head-stock placed on the body of the machine tool, and in the socket of the tailstock a rotationally mounted blank holder is mounted, between which a circle-shaped treated item made of metal sheeting is placed, which consists of having at least one tool in the zone of the edge of the treated item, consisting of a roller with an envelope shape concave surface, placed on a support, connected with a controller, which makes the roller move in a pulsating and reciprocating manner.
• the treated item is a product after shape treatment.
• the treated item is a die stamping.
• the treated item is a cylindrical vessel It is especially advantageous, when the treated item is a circle of metal sheet
• Stencil 1 is placed on a rotating spindle 3, placed in a head-stock 4 placed on the body 5, on the cradles 6 of which on the opposite side of the spindle a sliding tailstock 7 is placed.
• the blank holder 2 is placed in the socket of the tailstock.
• rollers 9 are located, which perform reciprocating and pulsating movements, controlled by a CNC controller, which is not shown in the figure, and connected with the pressure and control mechanism 10.
• the stencil 1 on the frontal surface may have an opening, in which a centring peg 1J_ is placed, which after the fixing of the treated item 12, on the other side will be pressed by the blank holder 2.
• the treated item 12 is an item after shape treatment, and especially, depending on the requirements, the treated item 12 is a pipe section, die stamping, sheet circle or a cylindrical vessel.
• a method for hemming of metal sheet products consists of the treated item 12 being placed between the stencil 1 and the blank holder 2.
• the treated item 12 rotates with the stencil 1 and blank holder 2 with a rotational speed of less than 10 rpm, and the edge of the treated item 12 is acted upon by a tool in the form of previously shaped roller 9 with a concave shape.
• the tool controlled by a CNC controller acts upon the edge of the circle 9 with a frequency of (10 to 50) Hz and amplitude of (2 - 6) mm, and moves towards the rotation axis in relation to the edge wit a feed of (0.08 - 0.15) mm per rotation.
• the treated item (12) makes additionally at least one rotation with an immobilised shaping roll (9).

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Shaping Metal By Deep-Drawing, Or The Like (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=43533436

Family Applications (1)

Country Status (3)

Families Citing this family (3)

Family Cites Families (8)

• 2010
  • 2010-06-24 PL PL391610A patent/PL220866B1/pl unknown
  • 2010-09-21 EP EP10766129.0A patent/EP2585237A1/en not_active Withdrawn
  • 2010-09-21 WO PCT/PL2010/000093 patent/WO2011162625A1/en not_active Ceased

Non-Patent Citations (1)

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