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
  • B21D28/00—Shaping by press-cutting; Perforating
  • B21D28/24—Perforating, i.e. punching holes
  • B21D28/36—Perforating, i.e. punching holes using rotatable work or tool holders
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T83/00—Cutting
  • Y10T83/929—Tool or tool with support
  • Y10T83/9372—Rotatable type
  • Y10T83/9387—Punching tool
  • Y10T83/9389—Shear type
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T83/00—Cutting
  • Y10T83/929—Tool or tool with support
  • Y10T83/9411—Cutting couple type
  • Y10T83/9423—Punching tool
  • Y10T83/9428—Shear-type male tool
  • Y10T83/943—Multiple punchings

Definitions

• the invention relates to a punching tool arranged in a rotary punching machine with a circumferential punch tool carrying a punch on its circumference and a circumferential counter tool cooperating therewith, on the circumference of which punching bushes serving as dies are fastened.
• the invention has for its object to keep this damage as low as possible.
• stamping tool and / or the counter-tool between the individual stamps or punching bushes has a groove extending in the circumferential direction and radially recessed from the circumferential surface, the depth of which is greater than the engagement of the stamp in is the punch rifle.
• the advantage of the invention lies in the fact that in the event of a malfunction, ie when stamps become disengaged from the punch bushings, the stamps run onto the punch bushings and the stamps and also the bushings can be damaged, but not the bores in which stamps or bushings are arranged.
• the punches protrude freely into the groove and meet no resistance there. Due to the groove between the punches or punching bushes, the hole that receives them is somewhat deeper, so that fragments cannot damage these holes. This makes it possible for new or revised bushes and / or punches to be reinserted into the bores without the entire tool having to be scrapped. This saves considerable costs and time.
• the width of the groove is larger than the diameter of the stamp, for example the groove can be 20% wider than the diameter of the stamp. This is a good compromise between the endeavors that To weaken the tool as little as possible due to the groove milled radially into the circumferential surface, but on the other hand to remove fragments of punches or bushings as well as possible.
• the groove has oblique flanks which flare out the groove cross section.
• This slope can, for example, run at an angle of 30 °. This facilitates the taking up of fragments in the groove and the removal of these fragments from the groove and also the removal of the fragments from the groove during the rotation of the tool.
• the depth of the groove can be, for example, 1.5 times the punch engagement in the punch bushings.
• the invention can be implemented in all tool pairs working in the rotary stamping method, in which dies with stamping dies converge in synchronism.
• the invention is also independent of the material that is processed in the punching machine.
• Fig. 2 is a section along the line II-II of Fig. 1;
• Figure 3 is a plan view of an angled portion of the circumference of a counter tool containing the punch sleeves on a larger scale.
• Fig. 4 is a section along the line IV-IV of Fig. 3;
• radially directed punches 2 are rigidly attached to the circumference of a rotating disk-shaped die tool 1.
• the attachment of the punches is not shown.
• a counter tool 3 cooperating with the stamping tool 1 has punch bushings 4 serving as dies on its periphery, which are fastened in the counter tool 3 by screws 5.
• the punch sleeves 4 are arranged in a bore 6 with a snug fit and have a central bore 7 into which the punches 2 are immersed, for example, 0.5 mm deep.
• the punch bushings 4 have a shoulder 8 at one point on their circumference, into which the head 9 of the screw 5 enters when it is screwed into a threaded bore 10 of the opposing tool.
• two rows of stamps and punching bushes running alongside one another are arranged on the circumference of the stamping tool and counter-tool.
• a groove 12 runs in the circumferential direction of the counter tool, the width of which is slightly larger than the diameter of the punch.
• the depth of the groove is greater than the engagement of the punches in the punch bushings 4, for example it can be 0.6 to 0.8 mm deep.
• the groove 12 can also take up small fragments without substantially damaging the peripheral surface of the two rotating tools working together. At least this groove 12 reduces the damage to the circumference of the two tools working together when the punch breaks.
• the groove has a cross section that tapers against the groove base 13, the flanks 14 of the groove run obliquely at an angle of approximately 30 °, the width of the groove at the groove base 13 is, for example, 5 mm, and the punch diameter can be 4 mm and accordingly the bore 7 of the punching sleeves 4 mm plus an addition of 0.05 to 0.1 mm.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
• Centrifugal Separators (AREA)
• Forging (AREA)
• Extrusion Moulding Of Plastics Or The Like (AREA)
• Control Of Electric Motors In General (AREA)
• Punching Or Piercing (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6360554

Family Applications (1)

Country Status (10)

Cited By (2)

Families Citing this family (4)

Citations (4)

Family Cites Families (10)

• 1988
  • 1988-08-10 DE DE3827077A patent/DE3827077C1/de not_active Expired
  • 1988-08-10 DE DE8817030U patent/DE8817030U1/de not_active Expired - Lifetime
• 1989
  • 1989-08-01 WO PCT/DE1989/000502 patent/WO1990001381A1/de not_active Ceased
  • 1989-08-01 US US07/646,766 patent/US5152209A/en not_active Expired - Lifetime
  • 1989-08-01 EP EP19890908686 patent/EP0432173B1/de not_active Expired - Lifetime
  • 1989-08-01 AT AT89908686T patent/ATE81805T1/de not_active IP Right Cessation
  • 1989-08-01 FI FI910370A patent/FI910370A7/fi unknown
  • 1989-08-01 DE DE8989908686T patent/DE58902575D1/de not_active Expired - Lifetime
  • 1989-08-01 JP JP50815989A patent/JPH0632919B2/ja not_active Expired - Fee Related
  • 1989-08-09 ES ES8902837A patent/ES2014380A6/es not_active Expired - Lifetime
• 1991
  • 1991-02-08 DK DK021691A patent/DK170462B1/da not_active IP Right Cessation
  • 1991-02-08 NO NO910512A patent/NO174578C/no not_active IP Right Cessation

Patent Citations (4)

Also Published As

Similar Documents

Legal Events