US2912249A - Tool clamps - Google Patents
Tool clamps Download PDFInfo
- Publication number
- US2912249A US2912249A US590934A US59093456A US2912249A US 2912249 A US2912249 A US 2912249A US 590934 A US590934 A US 590934A US 59093456 A US59093456 A US 59093456A US 2912249 A US2912249 A US 2912249A
- Authority
- US
- United States
- Prior art keywords
- tools
- punch
- tool
- adaptor
- working
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 239000011324 bead Substances 0.000 description 6
- 239000002184 metal Substances 0.000 description 2
- 101100257529 Mus musculus Spef1 gene Proteins 0.000 description 1
- 101100460374 Rattus norvegicus Pdzk1 gene Proteins 0.000 description 1
- 101100257530 Xenopus laevis spef1 gene Proteins 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/04—Movable or exchangeable mountings for tools
-
- 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
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/08—Bending by altering the thickness of part of the cross-section of the work
- B21D11/085—Bending by altering the thickness of part of the cross-section of the work by locally stretching or upsetting
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S403/00—Joints and connections
- Y10S403/01—Magnetic
-
- 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
- Y10T279/00—Chucks or sockets
- Y10T279/17—Socket type
- Y10T279/17888—Tang offset within socket
-
- 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
- Y10T279/00—Chucks or sockets
- Y10T279/23—Chucks or sockets with magnetic or electrostatic means
Definitions
- the invention relatesto a clamping appliance for ⁇ exl changeable tools, in particular for high-speed machines for cold-forming sheet and strip.
- Such machines are employed in manufacturing processes in many different ways, so that a great number of special tools is required for use with them and which often have to be brought into operation one after another in rapid succession.
- the machines which operate rapidly and have several diiferent working speeds, can only be utilized over their whole performance range in an economical manner, if the repeated exchanges of tools, which are required in order to perform the various stages in the forming of a component, can be carried out quickly and reliably.
- the invention proposes now to provide the tools and their clamps or attachments with contact faces such that the tools or their attachments can be pulled away in a direction at right angles to the working stroke of the tools, at least one of the two faces in contact having magnetic properties.
- the magnetic properties shall be given to the contact faces of the tool attachments and/ or of the tools or tool clamps by means of built-in permanent magnets, so that these parts, especially the tools, can only be pulled 01T by overcoming the attractive forces due to the magnetic flux.
- Fig. l is a side view partly in section of an arrangement of tools according to the invention, as used in a machine for cold forming sheet and strip;
- Fig. 5 shows the plan view of Fig. 4.
- the tool attachment consists of a top plate 1 and a bolster plate 2.
- the top plate 1 is provided with an undercut bead 3.
- an adaptor 4 having a dovetailed projection 5, can be inserted into this bead from the side. This is made possible by having the dovetailed guide bead, which in Figs. 2 and 3 is shown for the under side of the adaptor, approximately U-shaped in plan, i.e. open on one side.
- the adaptor 4 has on its under side an identically shaped dovetailed guide bead 3', which locates a dovetailed projection 5 of a punch 6.
- the guide bead 3 2,912,249 Patented Nov. 10, 1959 ICC 2 is U-shaped in plan, and thus permits the punch 6 to be withdrawn to the side.
- Their magnetic attraction permits the tools to be withdrawn sideways, if a certain force is applied, but keeps them securely in position as required for the safe operation of the machine.
- dowel pins are provided at 9 which register into corresponding recesses in the mating parts. These dowel pins prevent at the same time the parts from rotating relative to each other.
Description
w. EcKoLD TooL cLAMPs Nov. 10, 1959 2 Sheets-Sheet 1 Filed June 12, 1956 United States Patent4 O TOOL CLAMPS Walter Eckold, St. Andreasberg, Oberharz, Germany Application June12,19 56, Serial N o. 590,934
Claims priority, application Germany, June 13, 1955 "4 Claims. (Cl. 279-1) The invention relatesto a clamping appliance for `exl changeable tools, in particular for high-speed machines for cold-forming sheet and strip. v
Such machines are employed in manufacturing processes in many different ways, so that a great number of special tools is required for use with them and which often have to be brought into operation one after another in rapid succession. The machines, which operate rapidly and have several diiferent working speeds, can only be utilized over their whole performance range in an economical manner, if the repeated exchanges of tools, which are required in order to perform the various stages in the forming of a component, can be carried out quickly and reliably.
The complicated nature of the fastenings hitherto proposed has made it necessary up to now, to spend a considerable amount of working time in fitting and removing these tools, which greatly reduced the eiciency and the economical utilization of the machines in question. In o1'- der to remedy this state of affairs, the invention proposes now to provide the tools and their clamps or attachments with contact faces such that the tools or their attachments can be pulled away in a direction at right angles to the working stroke of the tools, at least one of the two faces in contact having magnetic properties.
It is preferred that the magnetic properties shall be given to the contact faces of the tool attachments and/ or of the tools or tool clamps by means of built-in permanent magnets, so that these parts, especially the tools, can only be pulled 01T by overcoming the attractive forces due to the magnetic flux.
As an example of the invention embodiments suitable for cold forming metal sheet and strip thereof will now be explained in greater detail with reference to the accompanying drawings of which:
Fig. l is a side view partly in section of an arrangement of tools according to the invention, as used in a machine for cold forming sheet and strip;
Fig. 2 is a view of the adapter in side view;
Fig. 3 is an end view seen in the direction of the arrow A of Fig. 2;
Fig. 4 shows a section through part of another embodiment of the invention; and
Fig. 5 shows the plan view of Fig. 4.
In the tool set-up as shown in Figs. l, 2 and 3, the tool attachment consists of a top plate 1 and a bolster plate 2. The top plate 1 is provided with an undercut bead 3. In the example illustrated, an adaptor 4, having a dovetailed projection 5, can be inserted into this bead from the side. This is made possible by having the dovetailed guide bead, which in Figs. 2 and 3 is shown for the under side of the adaptor, approximately U-shaped in plan, i.e. open on one side.
The adaptor 4 has on its under side an identically shaped dovetailed guide bead 3', which locates a dovetailed projection 5 of a punch 6. The guide bead 3 2,912,249 Patented Nov. 10, 1959 ICC 2 is U-shaped in plan, and thus permits the punch 6 to be withdrawn to the side.
The tool attachments 1 and 2, the adaptor 4 which has to be provided if required, and also if necessary the tools 6 and 7 are provided with permanent magnets 8, which are inserted into these parts and whose object it is to ensure the attractive force required for the assembly of these parts. Their magnetic attraction permits the tools to be withdrawn sideways, if a certain force is applied, but keeps them securely in position as required for the safe operation of the machine.
Referring to Fig. 1 the direction of force application is such as to force punch 6 toward the stationary punch 7. Thus the element 6 is the force-applying means. having a work-contacting surface at right angles to the di. rection of force of the punch 6.
In order to assist in the correct location of the tools, dowel pins are provided at 9 which register into corresponding recesses in the mating parts. These dowel pins prevent at the same time the parts from rotating relative to each other.
Figs. 4 and 5 show an embodiment of the invention suitable for tool attachments having comparatively larger dimensions. In such a case, when it might be required that a number of tools are working together in a combined set-up, the tools can again be arranged suitably for rapid exchange, whilst at the same time ensuring absolutely secure attachment to the supporting plates, or if necessary to an adaptor. In this embodiment permanent magnets 11 embedded in a xed plate 10, have spherical recesses 12. The base of the tools or of the recesses is provided with a number of symmetrically arranged cylindrical holes, which contain steel balls 13 whose diameters correspond with those of the spherical recesses in the plates. The steel balls can be pushed in deep enough against spring pressure by means of springs 15 so as to be ilush with the plane base of the tools. They are prevented from falling out of their holes by slightly caulking the exits of the latter.
As the tool 14 is inserted from the side, the steel balls disappear inside their cylindrical holes. Only after the tool has been pushed in fully so as to take up its fmal working position will the permanent magnet or magnets pull the steel balls down into their respective spherical holes, so that the tool will be located in that position.
If more than two or more tools are working together in a combination tool arrangement, it is equally possible to locate them accurately in this manner and to secure them in position.
The dimensions of the spherical recess 12 in the permanent magnets 11 must be such that the tool can be withdrawn, at right angles to the direction of the working stroke, if a suitable force is applied. During that withdrawal action the steel ball slides back into its hole. Use can here be made of the fact that, because of the increased surface of the spherical recess, the effective surface of the permanent magnets is increased.
Location of the tools by steel balls which register into spherical recesses in the permanent magnets, has the additional advantage that the tools cannot be dislodged even if the operating force of the punch acts in a direction other than normal to the working face of the tools.
The total number of spherical recesses and of steel balls in the contact surfaces can be increased, by arranging more of them in the spaces in between the permanent magnets, and pitched on the same diameter as the latter. In this manner any desired angular position of the tools can be obtained. If such an arrangement is used, the balls are best loaded by springs placed inside their holes. This will ensure the correct engagement of the balls in all spherical recesses, including those having no magnetic properties.
It will be obvious- Athat the clamping arrangement according to the invention will result in an exceptionally simple and rapid method of exchanging the tools and, where required, the adaptors, since all that is necessary to exchange the tools is to pull them out sideways. It is here important that either the punch or the die can be inserted and dismantled Without interfering with the other parts of the machine and without altering the height ofthe tup. Y
`What I claim is:
1. Apparatus for clamping rapidly exchangeable tools on a support and particularly for use in the cold treatment and working of sheet and strip metal, comprising a punch having a work contacting surface at substantially right angles to the force applying direction on the punchv and having a U-shaped dove-tailed projection on an opposite surface, an adaptor having a U-shaped,dove tailed guide bead to cooperate with the projection on the surface of the punch and which permits rapid lateral movement and separation of the punch relative to the adaptor, and magnetic means mounted in the punch and the adaptor to maintain the punch and adaptor securely in position relative to each other during the Working of the apparatus.
2. Apparatus according to claim 1, in which the magnetic means is a permanent magnet built into the punch.
3. Apparatus according to claim 1, in which the magnetic means is a permanent magnet built into the adaptor.
4. Apparatus according to claim l, in which a dowel pin is provided secured in the adaptor and projecting into the pun-:h to prevent unintentional rotation'of the punch.
vReferences Cited in the fle` of this patent UNITED STATS PATENTS clark May. 1, 1951
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEE10853A DE1142333B (en) | 1955-06-13 | 1955-06-13 | Holder for the tools on high-speed presses for cold forming sheet metal and profiles |
Publications (1)
Publication Number | Publication Date |
---|---|
US2912249A true US2912249A (en) | 1959-11-10 |
Family
ID=7067962
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US590934A Expired - Lifetime US2912249A (en) | 1955-06-13 | 1956-06-12 | Tool clamps |
Country Status (6)
Country | Link |
---|---|
US (1) | US2912249A (en) |
BE (1) | BE548557A (en) |
CH (1) | CH341135A (en) |
DE (1) | DE1142333B (en) |
FR (1) | FR1151403A (en) |
GB (1) | GB786456A (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3171663A (en) * | 1960-07-15 | 1965-03-02 | James A Stark | Machine tool chucking device |
US3355209A (en) * | 1965-05-10 | 1967-11-28 | Magnetic Devices Inc | Material handling device |
US3358897A (en) * | 1964-03-31 | 1967-12-19 | Tempress Res Co | Electric lead wire bonding tools |
US4476762A (en) * | 1982-01-18 | 1984-10-16 | Anderson Iii Frank T | Cutting die supporting plate apparatus |
US4515535A (en) * | 1983-08-15 | 1985-05-07 | Baxter Travenol Laboratories, Inc. | Peristaltic pump quick disconnect rotor assembly |
US4609325A (en) * | 1983-12-23 | 1986-09-02 | Automobiles Peugeot | Robot wrist |
EP0268698A1 (en) * | 1986-11-24 | 1988-06-01 | Schön & Cie GmbH | Clamping device for a punch tool on a punching machine |
US5167478A (en) * | 1990-04-03 | 1992-12-01 | Kennametal Inc. | Tool holder with radial tool change mechanism |
US6227853B1 (en) * | 1999-02-11 | 2001-05-08 | Edge Technologies, Inc. | Magnetic coupling system and method |
EP1479461A1 (en) * | 2003-05-23 | 2004-11-24 | Schiavi Macchine Industriali S.p.A. | Support system for a punch in a bending press |
US20080216448A1 (en) * | 2007-03-08 | 2008-09-11 | Poly-Clip System Gmbh & Co. Kg | Closing tool assembly |
WO2019090317A1 (en) * | 2017-11-06 | 2019-05-09 | Mate Precision Tooling, Inc. | Magnetic press brake tooling engagement system |
US10792716B2 (en) | 2017-06-29 | 2020-10-06 | Mate Precision Tooling, Inc. | Magnetic press brake and machine tooling engagement systems |
US11383284B2 (en) | 2016-09-09 | 2022-07-12 | Mate Precision Technologies Inc. | Press brake tool engagement system |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4269553A (en) * | 1980-02-11 | 1981-05-26 | Caterpillar Tractor Co. | Arbor assembly |
WO1981002266A1 (en) * | 1980-02-11 | 1981-08-20 | J Drazy | Arbor assembly |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1331030A (en) * | 1917-10-19 | 1920-02-17 | Ryan John Edward | Device for holding tools or work |
US2241091A (en) * | 1939-06-08 | 1941-05-06 | Hood Josa Allen | Tube-end expander |
US2287286A (en) * | 1938-08-13 | 1942-06-23 | Karl Otto Goettsch | Magnetic chuck |
US2422800A (en) * | 1943-10-11 | 1947-06-24 | Helliwells Ltd | Apparatus for die-shaping sheet metal |
US2550775A (en) * | 1949-07-13 | 1951-05-01 | Wade Stevenson | Magnetic screw driver |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB542460A (en) * | 1900-01-01 | |||
AT165101B (en) * | 1945-08-22 | 1950-01-25 | Franz Gribsch | Device for loosening and tightening screws |
-
0
- BE BE548557D patent/BE548557A/fr unknown
-
1955
- 1955-06-13 DE DEE10853A patent/DE1142333B/en active Pending
- 1955-10-06 GB GB28566/55A patent/GB786456A/en not_active Expired
-
1956
- 1956-06-09 CH CH341135D patent/CH341135A/en unknown
- 1956-06-12 US US590934A patent/US2912249A/en not_active Expired - Lifetime
- 1956-06-13 FR FR1151403D patent/FR1151403A/en not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1331030A (en) * | 1917-10-19 | 1920-02-17 | Ryan John Edward | Device for holding tools or work |
US2287286A (en) * | 1938-08-13 | 1942-06-23 | Karl Otto Goettsch | Magnetic chuck |
US2241091A (en) * | 1939-06-08 | 1941-05-06 | Hood Josa Allen | Tube-end expander |
US2422800A (en) * | 1943-10-11 | 1947-06-24 | Helliwells Ltd | Apparatus for die-shaping sheet metal |
US2550775A (en) * | 1949-07-13 | 1951-05-01 | Wade Stevenson | Magnetic screw driver |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3171663A (en) * | 1960-07-15 | 1965-03-02 | James A Stark | Machine tool chucking device |
US3358897A (en) * | 1964-03-31 | 1967-12-19 | Tempress Res Co | Electric lead wire bonding tools |
US3355209A (en) * | 1965-05-10 | 1967-11-28 | Magnetic Devices Inc | Material handling device |
US4476762A (en) * | 1982-01-18 | 1984-10-16 | Anderson Iii Frank T | Cutting die supporting plate apparatus |
US4515535A (en) * | 1983-08-15 | 1985-05-07 | Baxter Travenol Laboratories, Inc. | Peristaltic pump quick disconnect rotor assembly |
US4609325A (en) * | 1983-12-23 | 1986-09-02 | Automobiles Peugeot | Robot wrist |
EP0268698A1 (en) * | 1986-11-24 | 1988-06-01 | Schön & Cie GmbH | Clamping device for a punch tool on a punching machine |
US5167478A (en) * | 1990-04-03 | 1992-12-01 | Kennametal Inc. | Tool holder with radial tool change mechanism |
US6227853B1 (en) * | 1999-02-11 | 2001-05-08 | Edge Technologies, Inc. | Magnetic coupling system and method |
EP1479461A1 (en) * | 2003-05-23 | 2004-11-24 | Schiavi Macchine Industriali S.p.A. | Support system for a punch in a bending press |
US20080216448A1 (en) * | 2007-03-08 | 2008-09-11 | Poly-Clip System Gmbh & Co. Kg | Closing tool assembly |
US7694490B2 (en) | 2007-03-08 | 2010-04-13 | Poly-Clip System Gmbh & Co. Kg | Closing tool assembly |
US11383284B2 (en) | 2016-09-09 | 2022-07-12 | Mate Precision Technologies Inc. | Press brake tool engagement system |
US10792716B2 (en) | 2017-06-29 | 2020-10-06 | Mate Precision Tooling, Inc. | Magnetic press brake and machine tooling engagement systems |
WO2019090317A1 (en) * | 2017-11-06 | 2019-05-09 | Mate Precision Tooling, Inc. | Magnetic press brake tooling engagement system |
US10953453B2 (en) | 2017-11-06 | 2021-03-23 | Mate Precision Technologies Inc. | Magnetic press brake tooling engagement system |
Also Published As
Publication number | Publication date |
---|---|
DE1142333B (en) | 1963-01-17 |
CH341135A (en) | 1959-09-30 |
BE548557A (en) | |
GB786456A (en) | 1957-11-20 |
FR1151403A (en) | 1958-01-30 |
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