US3759079A - Punching and forming tool with straightening facility for metal strip - Google Patents

Punching and forming tool with straightening facility for metal strip Download PDF

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Publication number
US3759079A
US3759079A US00150578A US3759079DA US3759079A US 3759079 A US3759079 A US 3759079A US 00150578 A US00150578 A US 00150578A US 3759079D A US3759079D A US 3759079DA US 3759079 A US3759079 A US 3759079A
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US
United States
Prior art keywords
pressure
plate
guide plate
tool
matrix
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
Application number
US00150578A
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English (en)
Inventor
E Nowak
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZAKLAD DOSWIADCZALNY PRAS AUTO
HYDOMAT ZAKLADACH MECHANICZNYC
Original Assignee
ZAKLAD DOSWIADCZALNY PRAS AUTO
HYDOMAT ZAKLADACH MECHANICZNYC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ZAKLAD DOSWIADCZALNY PRAS AUTO, HYDOMAT ZAKLADACH MECHANICZNYC filed Critical ZAKLAD DOSWIADCZALNY PRAS AUTO
Application granted granted Critical
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Expired - Lifetime legal-status Critical Current

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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
    • B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
    • 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
    • B21D22/02—Stamping using rigid devices or tools

Definitions

  • ABSTRACT A tool for the punching and forming of a metal strip while simultaneously straightening same under elevated pressure, comprises a pressure plate adapted to urge the metal strip against a matrix plate under hydraulic pressure and forming a guide for a plurality of punches displaceable by advance of the member carrying the hydraulic devices toward the matrix plate.
  • the pressureguide plate is provided with an insert cooperating with a recess in the matrix plate to deflect the metal strip during the forming operation.
  • the above method is implemented by the tool whose pressure-guide plate produces a very high pressure, owing to connecting it with hydraulic servo-motors located in the tool or in the press.
  • the pressureguide plate is provided with inserts made of highquality steel, whose proper shaping permits obtaining the required geometry of elements being manufactured.
  • This invention relates to the method of straightening metal strips and forming elements by means of a tool pressure plate and a tool for implementing the method.
  • the tools known to date for forming metal strip are provided with punches guided directly or indirectly.
  • the guide plate is connected with a punch plate,permanently, through side washers, forming a box-type design.
  • the guide plate is guided by means of columns connecting the lower tool plate with the upper plate.
  • the guide plate In tools with indirect guidance of a punch the guide plate simultaneously functions as a pressure plate which presses the strip against the matrix plate and, is thus a pressure-guide plate.
  • the pressure of the pressure plate is obtained by disk shaped or spiral springs, or other elastic elements, or by a system of pneumatic servo-motors located in the upper portion of the tool and connected with the pressure plate.
  • box-type tools The main drawback of box-type tools is the fact that the metal strip introduced into the too], because of the position of the guide plate, is not pressed onto the matrix plate of the moment the operation of the punches begins; this negatively influences their durability and diminishes thereby the dimensional accuracy of the workpiece being manufactured.
  • the pressure-guide plate performs, together with the upper portion of the tool, a full stroke upwards equalling the idle stroke of the press, thereby requiring properly designed column ways and increasing the cost and weight of the tool.
  • the object of this invention is the elimination of all these disadvantages.
  • a more specific object is to provide an improved method of metal/strip straightening and forming and a tool for carrying out this method which ensures a strong pressure of the pressure-guide plate, high durability, and accuracy of operation with simple construction.
  • the high pressure of the strip against the matrix plate is obtained by means of hydraulic servo-motors located either in the press ta-' bles or in the punch plate, and by providing the matrix plate as the base of the punch plate.
  • the geometrical regularity of workpiece to be manufactured is obtained by mounting in the pressure-guide plate an insert or inserts of high-quality steel, the proper shaping of said inserts ensuring the forming operation, for instance bending and, straightening.
  • the punches are located in the closest proximity to the inserts and enable a connection in one tool cycle of the forming operation and the cutting operation.
  • the pressure-guide plate is guided on columns mounted in the lower tool plate, at which this plate is guided simultaneously in relation to the upper portion of the tool by means of punches, mounted in the punch plate.
  • punches are guided in the pressure-guide plate by means of sleeves mounted in the said plate with the use of plastic, for instance Epidian.
  • the basic advantage of the tool according to the invention is the fact that it incorporates the positive features of box-type tools and tools with indirect punch guidance.
  • the guiding of the pressure plate on setting columns in the lower part of the tool permits a limitation of its stroke upwards, i.e. the stroke of the plate can be adjusted to be of such a range, as to enable a free feed of the strip in to the tool and the ejection of the product.
  • the pressure-guide plate with its system of hydraulic servo-motors ensures a very high pressure of the strip against the matrix plate of the order of up to 50 percent of the total press pressure, thereby ensuring an ideal straightening of the strip in the working zone of the tool and enabling a simultaneous forming of the element being manufactured by means of inserts in the pressure-guide plate.
  • the mounting with the use of plastic in the pressureguide plate of guide sleeves for the punches maintains the coaxiality of the punches and holes in pressure and punch plates, which improves the ease of assembly of the tool and increases the durability of the punches and matrix.
  • the increased durability of tool is also enhanced by the ideal straightening of the strip under strong pressure against the matrix plate.
  • the forming by means of a'pressure plate simplifies the restoration of the tool, such that the grinding of the matrix plates and of cutting punches only is needed.
  • FIG. 1 shows a section of the tool for straightening strips and forming of elements
  • FIG. 2 shows a fragment of the tool with an insert in the pressure plate and adjoining cutting punches
  • FIG. 3 shows an example of an element made by the tool
  • FIG. 4 shows the press with mounted tool according to invention.
  • the tool for forming and straightening of elements made of metal strips consists of punch plate 3 and strap 27 connected with upper plate 2, pressure-guide plate 4, matrix plate 5, and base of matrix 6.
  • the pressure-guide plate is guided on columns 12, at which the clearance between the pressure plate and matrix plate is adjusted by means of washers l3 and screws 14 coarsely, and precisely by means of washers 11 and screws 10.
  • punch plate 3 In the punch plate 3 are fastened punches l7,l7a,and 20, which punches are guided in the pressure plate by means of sleeves 16,16a, and 19, sealed in the said plate with plastic,e.g. Epidian 15,15a,l8.
  • the pressure-guide plate 4 presses the strip 24 against the matrix plate 5 by hydraulic servo-motors 8 and 9, located in the punch plate 3, strap 27 and upper plate 2, or in the working table 1 of the press.
  • the hydraulic servo-motors are connected with the pressure-guide plate 4 by means of pushers pistons 25 and 26.
  • In the pressure-guide plate 4 are mounted inserts 21 cooperating with cut-outs or recesses 22.
  • the pressure-guide plate 4 is maintained in the upper position by means of springs 23.
  • FIG.2 is shown a fragment of the tool in working position during forming of an element, at which are shown the angle between l7830 and l5520 in the insert and angles ,6 in the cut-out of the matrix plate, and angle of inclination 8 between 4'and 015 of generatrix of the hole for punches in the matrix plate, which angles are decisive of the proper geometry of an element being formed.
  • FIG.3 is illustrated the element made.
  • the operation of the tool is as follows: a known feeding device introduces the strip to the tool. In the proper moment of the work cycle the strip is pressed on to the matrix plate by the pressure-guide plate 4 due to the action of servo-motors 8 and 9.
  • the insert or inserts 21 are forming the element: for instance they perform the operations of bending, or chamfering, or straightening, through the introduction of the strip to the cooperating cut-outs 22 in the matrix plate.
  • the work table 1 begins the working stroke causing the penetration of punches into the strip and in the holes in the matrices and in result a final forming of the element.
  • the strip After retraction of the table 1 and of the pressureguide plate 4 to the upper position, the strip is shifted in the tool forward, at which the leading edge of the strip ejects the formed element. The work cycle then starts again.
  • a tool for the forming of a metal strip in a press having a base and a member movable in the direction of said base, said tool comprising:
  • a matrix plate resting upon said base and formed with at least two punching dies along a surface upon which said strip is adapted to rest, and with a first formation deviating from said surface and located between said dies;
  • a pressure-guide plate lying generally parallel to said surface and having a face confronting same, said pressure-guide plate being shiftably mounted on said columns for movement in a direction perpendicular to said surface;
  • a punch-carrying plate member mounted on said columns and disposed between said base and movable member of said press and said pressure-guide plate for movement in said direction;
  • hydraulically pressurizable servo-motor means on at least one of said members and having a plurality of pistons connected with said pressure-guide plate for urging same in the direction of said matrix plate under a hydraulic pressure independent of the pressure applied by said movable member of said press to said punch-carrying plate member.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Press Drives And Press Lines (AREA)
US00150578A 1970-06-13 1971-06-07 Punching and forming tool with straightening facility for metal strip Expired - Lifetime US3759079A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL14133870A PL78112B1 (xx) 1970-06-13 1970-06-13

Publications (1)

Publication Number Publication Date
US3759079A true US3759079A (en) 1973-09-18

Family

ID=19951864

Family Applications (1)

Application Number Title Priority Date Filing Date
US00150578A Expired - Lifetime US3759079A (en) 1970-06-13 1971-06-07 Punching and forming tool with straightening facility for metal strip

Country Status (11)

Country Link
US (1) US3759079A (xx)
AT (1) AT310530B (xx)
BE (1) BE768396A (xx)
CH (1) CH554201A (xx)
DE (1) DE2128767C3 (xx)
FR (1) FR2096171A7 (xx)
GB (1) GB1350829A (xx)
HU (1) HU162513B (xx)
NL (1) NL7108047A (xx)
PL (1) PL78112B1 (xx)
SU (1) SU421170A3 (xx)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837241A (en) * 1972-10-11 1974-09-24 Sabre Saw Chain 1963 Ltd Process for cold forming a saw chain cutter link
US6751997B1 (en) * 1999-10-19 2004-06-22 Hydropulsor Ab Stamping press arrangement and method
CN103264095A (zh) * 2013-05-15 2013-08-28 长江润发机械股份有限公司 连续冲剪机
CN103736839A (zh) * 2013-12-27 2014-04-23 重庆飞龙江利汽车部件有限公司 一种油位计冲压装置
CN105251888A (zh) * 2015-11-20 2016-01-20 重庆庆建机械配件有限公司 一种摩托车导风板成型冲压模具

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1123708B (it) * 1979-09-12 1986-04-30 Salvagnini Transferica Spa Macchina punzonatrice automatica
US5062289A (en) * 1990-06-01 1991-11-05 Amp Incorporated Bending tooling for bending flat blanks
CN103639298B (zh) * 2013-11-27 2015-08-19 梧州恒声电子科技有限公司 前夹板拉光压角冲钉模具
CN111774474A (zh) * 2020-05-28 2020-10-16 南通德元机械制造有限公司 一种高精度金属冲孔弯曲模具及产品加工方法
CN111940563A (zh) * 2020-07-27 2020-11-17 河南鼎力杆塔股份有限公司 一种q460c特高压钢管塔钢构件加工装置及方法
CN111889568A (zh) * 2020-08-05 2020-11-06 上海李氏浩汽车零部件有限公司 一种座椅靠背外侧上连接板自动出件连续模

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1952195A (en) * 1933-02-02 1934-03-27 Waterbury Farrel Foundry & Mac Crank operated eyelet machine
US3395562A (en) * 1965-09-27 1968-08-06 Quality Tool & Die Co Cup drawing die and method
US3418706A (en) * 1967-09-25 1968-12-31 Charles S. White Method and apparatus for making bearings
US3435653A (en) * 1966-01-21 1969-04-01 Nat Dairy Prod Corp Forming method and apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1952195A (en) * 1933-02-02 1934-03-27 Waterbury Farrel Foundry & Mac Crank operated eyelet machine
US3395562A (en) * 1965-09-27 1968-08-06 Quality Tool & Die Co Cup drawing die and method
US3435653A (en) * 1966-01-21 1969-04-01 Nat Dairy Prod Corp Forming method and apparatus
US3418706A (en) * 1967-09-25 1968-12-31 Charles S. White Method and apparatus for making bearings

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837241A (en) * 1972-10-11 1974-09-24 Sabre Saw Chain 1963 Ltd Process for cold forming a saw chain cutter link
US6751997B1 (en) * 1999-10-19 2004-06-22 Hydropulsor Ab Stamping press arrangement and method
CN103264095A (zh) * 2013-05-15 2013-08-28 长江润发机械股份有限公司 连续冲剪机
CN103736839A (zh) * 2013-12-27 2014-04-23 重庆飞龙江利汽车部件有限公司 一种油位计冲压装置
CN103736839B (zh) * 2013-12-27 2016-01-27 重庆飞龙江利汽车部件有限公司 一种油位计冲压装置
CN105251888A (zh) * 2015-11-20 2016-01-20 重庆庆建机械配件有限公司 一种摩托车导风板成型冲压模具

Also Published As

Publication number Publication date
DE2128767A1 (de) 1972-01-20
BE768396A (fr) 1971-11-03
HU162513B (xx) 1973-02-28
PL78112B1 (xx) 1975-04-30
DE2128767B2 (de) 1975-02-06
NL7108047A (xx) 1971-12-15
DE2128767C3 (de) 1975-09-18
CH554201A (de) 1974-09-30
AT310530B (de) 1973-10-10
GB1350829A (en) 1974-04-24
FR2096171A7 (xx) 1972-02-11
SU421170A3 (ru) 1974-03-25

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