EP2632621A1 - Device for clamping a fixture attachment to a wire saw cutting machine - Google Patents

Device for clamping a fixture attachment to a wire saw cutting machine

Info

Publication number
EP2632621A1
EP2632621A1 EP11776318.5A EP11776318A EP2632621A1 EP 2632621 A1 EP2632621 A1 EP 2632621A1 EP 11776318 A EP11776318 A EP 11776318A EP 2632621 A1 EP2632621 A1 EP 2632621A1
Authority
EP
European Patent Office
Prior art keywords
fixture attachment
adapter piece
fixture
guiding
clamping
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.)
Withdrawn
Application number
EP11776318.5A
Other languages
German (de)
French (fr)
Inventor
Andrew Wenger
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.)
Meyer Burger AG
Original Assignee
Meyer Burger AG
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 Meyer Burger AG filed Critical Meyer Burger AG
Publication of EP2632621A1 publication Critical patent/EP2632621A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D57/00—Sawing machines or sawing devices not covered by one of the preceding groups B23D45/00 - B23D55/00
    • B23D57/003—Sawing machines or sawing devices working with saw wires, characterised only by constructional features of particular parts
    • B23D57/0046—Sawing machines or sawing devices working with saw wires, characterised only by constructional features of particular parts of devices for feeding, conveying or clamping work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
    • B28D5/0058—Accessories specially adapted for use with machines for fine working of gems, jewels, crystals, e.g. of semiconductor material
    • B28D5/0082—Accessories specially adapted for use with machines for fine working of gems, jewels, crystals, e.g. of semiconductor material for supporting, holding, feeding, conveying or discharging work

Definitions

  • the present invention pertains to a device for clamping a fixture attachment to a wire saw cutting machine, comprising tension rods for fixing the fixture attachment to an adapter piece fixed to a machine part, according to the preamble of claim 1.
  • a device for clamping a fixture attachment to a wire saw cutting machine comprising tension rods for fixing the fixture attachment to an adapter piece fixed to a machine part, according to the preamble of claim 1.
  • Such a device is known, for example for clamping a fixture attachment to which a silicon ingot is glued to be machined by a wire saw cutting machine.
  • the fixture attachment is provided with two guiding shoulders with angled faces sliding in a correspondingly formed L-shaped strip, which in turn is fixed to an adapter piece.
  • the fixture device is clamped to the adapter piece by the tension rods, whereby the angled surfaces are clamped.
  • Normal sawing machines have multiple tension rods, normally placed- in a row extending in the direction the work piece extend in. In the Figure this is the direction perpendicular to the face of the drawings.
  • the angled surfaces on both the adapter piece and the fixture attachment has to be manufactured with high accuracy.
  • one or both these surfaces may be formed by standard parts, reducing the costs .
  • a further advantage of the present invention is that the surfaces of the adapter piece relevant for accurately clamping the fixture attachment can be cleaned easily because their surface is smaller.
  • Fig. 1 shows in a partial section a part of the machine with the working piece attached to a clamping device
  • Fig. 2- shows a prior art . clamping device
  • Fig. 3 shows a clamping device according to the
  • Fig. 4 show a variant of the embodiment of Fig. 3.
  • Fig. 1 only some parts which are essential for the present invention are shown in a rather schematically way.
  • the working piece 1 for example a silicon ingot, is fixed to a transitional part 2, which in turn is fixed to a fixture attachment 3 of clamping device 4.
  • This clamping device 4 is attached to a machine part 5, in occurrence a feed carriage.
  • the machine 6 comprises sawing or cutting means like saw bands or saw wires 7 which may form a field of bands or wires and which are held between wire guiding rolls 8. Slurry may be used for sawing or the wires may have an abrasive coating or layer.
  • the wire may be pulled over the work piece in a continuous or a reciprocing manner.
  • besides silicon many other materials, preferably brittle materials, may be cut, such as sapphire, bore, stone, glass. Since the working piece is fixed, for example by gluing, to the intermediate part, which in turn is also glued to the fixture attachment, the positioning of the workpiece precision of the cutting operation—depends largely on the clamping of the fixture attachment to the machine part.
  • Prior art clamping 9 device comprises a fixture attachment 10, which is clamped to an adapter piece 11 with the aid of tension rods 12.
  • the connection of the attachment to the adapter is in the form of a dovetail connection.
  • T-shaped fixture attachment 10 comprises two angled guiding surfaces 13 at both edges of the top surface 14, in which an appropriate groove 15 has been formed for receiving the tension rods 12.
  • Adapter piece 11 comprises corresponding parts, e.g. a flat bottom 16 and two angled guiding surfaces 17, closed by L- shaped strips 18.
  • Adapter piece 11 is fixed to feed carriage 5.
  • this construction involves the danger of a slanted clamping, lowering thus the precision and quality of the cutting operation, because there is necessarily some lateral play between the fixture attachment and the tension rods, so that the contact, during the clamping procedure, may not be the same on both sides of the guiding surfaces.
  • the fixture attachment can always be introduced in two different ways into the adapter piece since there are no orientation means.
  • adapter piece 21 is provided at least with one guiding means 22 in the form of a guiding rail which is received in a matching groove 23 in fixture attachment 19.
  • the profile of the end 22A of the guiding means cooperating with the groove is prismatic or tapered, tapered meaning a cross section that reduces in direction of the matching grooves and may be convex, concave, with flat or curved faces, providing two contact surfaces with the matching groove.
  • the walls of the groove may be slanted to match with the guiding rail.
  • the rail may extend over the complete length of a work piece , a part thereof or over multiple work pieces.
  • a guide bar 24 is provided, serving as abutment means, which is received in a matching groove 25 in fixture attachment 19.
  • the end 24A of the guide bar received in the groove is rectangular, such as the profile of the groove 25.
  • Guide bar 24 fits in the rectangular groove 25 so that the former can move in lateral direction, left to right in figs. 3 and 4. In this way the guide bar 24 does not define the lateral position.
  • the abutment means and the guiding means are made such that the mechanical system is statically determinated. Moreover only the guiding means delimit the movement of the fixture attachment from left to right in the drawings .
  • the guiding means and the guide bar are attached by screws to the adapter piece or can be made in one piece.
  • Fig. 4 shows a variant of the embodiment of Fig. 3 in that both the guiding means and the guide bar of clamping device 4A are not provided at the adapter piece but at the fixture attachment.
  • Fixture attachment 29 is similar to fixture attachment 19 with the difference that the guiding means 30 with the front end 30A and the guide bar 31 with its front end.31A are attached to it. As mentioned above those two pieces are interchangeably.
  • the groove 32 matching guiding means 30 is prismatic or tapered as well as the front end 30A of the guiding means, whereas groove 33 at the other end of the adapter piece matching guide bar 31 has the same rectangular profile as the end of guide bar 31, having a flat surface, that may be the bottom of a recess.
  • the matching of the guiding means and guide bars with the grooves has the meaning to delimit the transversal movement.
  • the guiding means extend at least partially over the length of the fixture attachment 19, 29.
  • the guiding elements provide for a separation of the charging and decharging function and the clamping function.
  • Both sides of the adapter piece 21, 34 are provided with a guide plate 26 forming a knee, whose longer member 27 is fixed to the adapter piece and whose shorter member 28 supports the fixture attachment when it is slid under the adapter piece.
  • the prismatic form of the guiding means has the advantage to be able to equalise in a certain measure tolerances, thus enabling a high precision in the longitudinal direction as well as in the height.
  • the guide bar provided on the other side of the tension rods results in a broader horizontal support which, together with the smaller distance of the slanted prismatic surfaces results in an enhancement of the clamping properties. This gives a clamping with higher precision and ⁇ -reproducibility .
  • the fixture attachment can be introduced into the clamping device in one way only. Theoretically, this would also apply with one guiding means or one guide bar only, but possibly with lesser precision.
  • All the guiding elements, guiding rails or means 22, 24 or guide bars 30, 31 can be executed as an integral part of the adapter piece 21, 34 or of the fixture element 19, 29, or foreseen to be removably attached.
  • Clamping device 4 or 4A according to the invention comprise tension rods 20 for clamping the fixture attachment 19, 29 to the adapter piece 21, 34.
  • the tension rods are introduced into the fixture attachment in a determined position and then rotated by 90° for lifting off and clamping the fixture attachment.
  • the tension rods cannot be considered as guiding elements, which are arranged on both sides of the tension rods.
  • the adapter piece can be provided with two guide rails. Theoretically this could apply also to two guide bars, only that in this case this would demand either a very high precision or result in a relatively important play.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Sawing (AREA)

Abstract

The device (4) for clamping a fixture attachment (19) to a machine comprises tension rods (20) for fixing the fixture attachment to an adapter piece (21) attached to a machine part, whereby the adapter piece (21) is provided at one side of the tension rods with at least a guiding means (22) cooperating with a matching groove (23) at the fixture attachment (19). On the other side of the tension rods a guide bar ( (24) is arranged operating with a matching groove (25) in the fixture attachment. Providing the fixture element with a guiding means, which can have a prismatic or rectangular end enhances on the one hand the precision of the clamping and of the position of the workpiece within the machine and gives on the other hand the customer the choice to introduce the fixture element in one orientation only or in both orientations under the adapter piece.

Description

Device for Clamping a Fixture Attachment to a Wire Saw
Cutting Machine
The present invention pertains to a device for clamping a fixture attachment to a wire saw cutting machine, comprising tension rods for fixing the fixture attachment to an adapter piece fixed to a machine part, according to the preamble of claim 1. Such a device is known, for example for clamping a fixture attachment to which a silicon ingot is glued to be machined by a wire saw cutting machine. The fixture attachment is provided with two guiding shoulders with angled faces sliding in a correspondingly formed L-shaped strip, which in turn is fixed to an adapter piece. The fixture device is clamped to the adapter piece by the tension rods, whereby the angled surfaces are clamped.
There is a lateral play between fixture attachment and tension rods and therefore it may happen that both sides of the two angled surfaces do not come in contact
simultaneously, which can provoke tilted clamping, resulting in variations in the position of the fixture attachment. This drawback is worsened by the large distance between the angled surfaces. Also, accurately tooling the slanted surfaces with respect to the adapter piece and relative to each other is difficult because of the large distance between them. In addition measuring the angle between the surfaces is much more difficult if they lay far apart.
Errors in the relative position of the two slanted surfaces result in a smaller error in the position of the fixture attachment because these surfaces lay closer together.
Normal sawing machines have multiple tension rods, normally placed- in a row extending in the direction the work piece extend in. In the Figure this is the direction perpendicular to the face of the drawings.
Departing from this prior art and taking in account the increasing need for higher production speed and quality it is an object of the present invention to provide for a device for clamping a fixture attachment with a choice of its orientation of insertion into the adapter piece and which assures a higher precision. This problem is solved by the device according to independent claim 1. The dependent claims define preferred embodiments of the invention.
Also, previously the angled surfaces on both the adapter piece and the fixture attachment has to be manufactured with high accuracy. With the ¾current invention, one or both these surfaces may be formed by standard parts, reducing the costs .
A further advantage of the present invention is that the surfaces of the adapter piece relevant for accurately clamping the fixture attachment can be cleaned easily because their surface is smaller.
The invention is explained below by means of drawings of preferred exemplary embodiments ' that also demonstrate with reference to the Figures further advantageous features.
Fig. 1 shows in a partial section a part of the machine with the working piece attached to a clamping device,
Fig. 2- shows a prior art . clamping device,
Fig. 3 shows a clamping device according to the
invention, and Fig. 4 show a variant of the embodiment of Fig. 3.
In Fig. 1 only some parts which are essential for the present invention are shown in a rather schematically way. The working piece 1, for example a silicon ingot, is fixed to a transitional part 2, which in turn is fixed to a fixture attachment 3 of clamping device 4. This clamping device 4 is attached to a machine part 5, in occurrence a feed carriage. The machine 6 comprises sawing or cutting means like saw bands or saw wires 7 which may form a field of bands or wires and which are held between wire guiding rolls 8. Slurry may be used for sawing or the wires may have an abrasive coating or layer. The wire may be pulled over the work piece in a continuous or a reciprocing manner.
According to the invention, besides silicon, many other materials, preferably brittle materials, may be cut, such as sapphire, bore, stone, glass. Since the working piece is fixed, for example by gluing, to the intermediate part, which in turn is also glued to the fixture attachment, the positioning of the workpiece precision of the cutting operation—depends largely on the clamping of the fixture attachment to the machine part.
Prior art clamping 9 device according to Fig. 2 comprises a fixture attachment 10, which is clamped to an adapter piece 11 with the aid of tension rods 12. The connection of the attachment to the adapter is in the form of a dovetail connection. Essentially T-shaped fixture attachment 10 comprises two angled guiding surfaces 13 at both edges of the top surface 14, in which an appropriate groove 15 has been formed for receiving the tension rods 12. Adapter piece 11 comprises corresponding parts, e.g. a flat bottom 16 and two angled guiding surfaces 17, closed by L- shaped strips 18. Adapter piece 11 is fixed to feed carriage 5.
As stated in the introduction this construction involves the danger of a slanted clamping, lowering thus the precision and quality of the cutting operation, because there is necessarily some lateral play between the fixture attachment and the tension rods, so that the contact, during the clamping procedure, may not be the same on both sides of the guiding surfaces. Furthermore, the fixture attachment can always be introduced in two different ways into the adapter piece since there are no orientation means.
The inventive difference to the prior art device lies in the enhanced precision of the clamping, resp. of the position of the working piece in relationship to the machine. To this end adapter piece 21 is provided at least with one guiding means 22 in the form of a guiding rail which is received in a matching groove 23 in fixture attachment 19. The profile of the end 22A of the guiding means cooperating with the groove is prismatic or tapered, tapered meaning a cross section that reduces in direction of the matching grooves and may be convex, concave, with flat or curved faces, providing two contact surfaces with the matching groove. The walls of the groove may be slanted to match with the guiding rail. The rail may extend over the complete length of a work piece , a part thereof or over multiple work pieces.
Here it is used interchangeably, that is, it has two angled surfaces directed to each other, such as the matching profile of groove 23. On the other side of the tension rod, preferably near the other end of the adapter piece a guide bar 24 is provided, serving as abutment means, which is received in a matching groove 25 in fixture attachment 19. The end 24A of the guide bar received in the groove is rectangular, such as the profile of the groove 25.
Guide bar 24 fits in the rectangular groove 25 so that the former can move in lateral direction, left to right in figs. 3 and 4. In this way the guide bar 24 does not define the lateral position. The abutment means and the guiding means are made such that the mechanical system is statically determinated. Moreover only the guiding means delimit the movement of the fixture attachment from left to right in the drawings .
The guiding means and the guide bar are attached by screws to the adapter piece or can be made in one piece.
Fig. 4 shows a variant of the embodiment of Fig. 3 in that both the guiding means and the guide bar of clamping device 4A are not provided at the adapter piece but at the fixture attachment. Fixture attachment 29 is similar to fixture attachment 19 with the difference that the guiding means 30 with the front end 30A and the guide bar 31 with its front end.31A are attached to it. As mentioned above those two pieces are interchangeably. In adapter piece 34 the groove 32 matching guiding means 30 is prismatic or tapered as well as the front end 30A of the guiding means, whereas groove 33 at the other end of the adapter piece matching guide bar 31 has the same rectangular profile as the end of guide bar 31, having a flat surface, that may be the bottom of a recess. The matching of the guiding means and guide bars with the grooves has the meaning to delimit the transversal movement. The guiding means extend at least partially over the length of the fixture attachment 19, 29. The guiding elements provide for a separation of the charging and decharging function and the clamping function.
Both sides of the adapter piece 21, 34 are provided with a guide plate 26 forming a knee, whose longer member 27 is fixed to the adapter piece and whose shorter member 28 supports the fixture attachment when it is slid under the adapter piece. The prismatic form of the guiding means has the advantage to be able to equalise in a certain measure tolerances, thus enabling a high precision in the longitudinal direction as well as in the height. Furthermore, . the guide bar provided on the other side of the tension rods results in a broader horizontal support which, together with the smaller distance of the slanted prismatic surfaces results in an enhancement of the clamping properties. This gives a clamping with higher precision and ·-reproducibility . In the case of a guiding means and a guide bar, the fixture attachment can be introduced into the clamping device in one way only. Theoretically, this would also apply with one guiding means or one guide bar only, but possibly with lesser precision.
All the guiding elements, guiding rails or means 22, 24 or guide bars 30, 31 can be executed as an integral part of the adapter piece 21, 34 or of the fixture element 19, 29, or foreseen to be removably attached. Clamping device 4 or 4A according to the invention comprise tension rods 20 for clamping the fixture attachment 19, 29 to the adapter piece 21, 34. The tension rods are introduced into the fixture attachment in a determined position and then rotated by 90° for lifting off and clamping the fixture attachment. Thus the tension rods cannot be considered as guiding elements, which are arranged on both sides of the tension rods. If however a customer does not want to attach the fixture attachment to the adapter piece in one way only, the adapter piece can be provided with two guide rails. Theoretically this could apply also to two guide bars, only that in this case this would demand either a very high precision or result in a relatively important play.
As said above, only parts essential for this invention have been drafted. This does not exclude providing the fixture attachment, the adapter piece or the machine part on the one hand and the wire guiding part on the other hand with further parts, f.ex. for tempering.

Claims

Claims
1. Device (4, 4A) for clamping a fixture attachment to a wire saw cutting machine, comprising tension rods (12, 20) for fixing a fixture attachment (3, 10; 19, 29) to an adapter piece (11, 21, 34) attached to a machine part (5), characterised in that the adapter piece (21, 34) or the fixture attachment (19, 29) is provided at one side of the tension rods with at least a guiding means (22; 30) co- operating with a matching groove (23; 32) at the fixture attachment (19, 29) or adapter piece (21, 34) .
2. Device according to claim 1, characterised in that the guiding means contain a guiding rail (22) having at least a tapered front and/or the matching groove (23, 32) at the fixture attachment (19, 29). or adapter piece (21, 34) hasx slanted walls.
3. Device according to claims 1 or 2, characterised in that on the other side of the tension rods the fixture attachment (19, 29) or the adapter piece (21, 34) is provided with an abutment means (24, 31) .
4. Device according to claim 3, characterised in that the abutment means is a guide bar (24, 31) having a rectangular front end (24A, 31A) , to be received on a flat surface (25, 33) .
5. Device according to any of claims 1 to 4, characterised in that the adapter piece (21, 34) is provided with a guiding rail (22, 30) and a guide bar (24, 31), the guiding rail being received in a matching groove (23, 32) and the guide bar being received on a flat surface (25, 33) on the fixture attachment (19, 29) .
6. Device according to any of claims 1 to 4, characterised in that the adapter piece (21, 34) is provided with- a guiding rail (22, 30) and the fixture attachment (19, 29) with a guide bar (24, 31); or vice versa.
.
7. Device according to any of claims 1 to 6, or 11 to 14, characterised in that the adapter piece (21, 34) is provided with an angled guide plate (26) at each side, one member (27) thereof being attached to the adapter piece and one member (28) thereof being capable of supporting the fixture attachment (19, 29) .
8. Device according to any of claims 1 to 7, or 11 to 14, characterised in that the guiding and abutment means (22, 24; 30, 31) are an integral part of the adapter piece (21; 34.) or fixture element (19; 29) .
9. Device according to any of claims 1 to 8, or 11 to 14, characterised in that the guiding and abutment means (22, 24; 30, 31) are removably attached to the adapter piece or fixture element.
10. Device according to claim 1 or 11, characterised in that the machine part (5) is a part of a machine for sawing or cutting silicon ingots (1) or other brittle materials, such as sapphire, bore, stone, glass with saw bands or saw wires (7) .
11. Device (4) for clamping a fixture attachment to a machine, comprising tension rods (12, 20) for fixing the fixture attachment (3, 10) to an adapter piece (11, 21) attached to a machine part (5), characterised in that the adapter piece (21) is provided with at least a guiding means (22, 24) co-operating with a matching groove (23, 25) at the fixture attachment (19) .
12. Device according to claim 11,. characterised in that the guiding means is a guiding rail (22) having at least a tapered front to be received in a matching tapered—groove (23) at the fixture attachment (19) and/or a guide bar (24) having a rectangular front end to be received in a matching rectangular groove (25) at the fixture attachment (19).
13.. Device according to claim 12, characterised in that the adapter piece (21) is provided with a guiding rail (22) and a guide bar (24), each received in a matching groove (23, 25) at the fixture attachment.
14. Device according to any of claims 11 to 13,
characterised in that the machine part (5) is a part of a machine for sawing or cutting silicon ingots (1) with saw bands or saw wires (7) .
EP11776318.5A 2010-10-29 2011-10-17 Device for clamping a fixture attachment to a wire saw cutting machine Withdrawn EP2632621A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH18172010 2010-10-29
PCT/CH2011/000245 WO2012055052A1 (en) 2010-10-29 2011-10-17 Device for clamping a fixture attachment to a wire saw cutting machine

Publications (1)

Publication Number Publication Date
EP2632621A1 true EP2632621A1 (en) 2013-09-04

Family

ID=44897557

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11776318.5A Withdrawn EP2632621A1 (en) 2010-10-29 2011-10-17 Device for clamping a fixture attachment to a wire saw cutting machine

Country Status (3)

Country Link
EP (1) EP2632621A1 (en)
CN (1) CN103189157B (en)
WO (1) WO2012055052A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102689025B (en) * 2012-06-06 2015-05-27 台州屹捷数控机床有限公司 Special main shaft box of lathe
CN104129003A (en) * 2014-07-29 2014-11-05 江苏美科硅能源有限公司 Bonding tool for silicon wafer cutting
CN107160302B (en) * 2017-07-18 2018-11-16 应鸿 The control method of intelligent fixture
CN115101625A (en) * 2022-06-27 2022-09-23 安徽龙芯微科技有限公司 Photoelectric element packaging body and packaging structure thereof

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JPH0469154A (en) * 1990-07-06 1992-03-04 Hitachi Ltd Wire saw
JPH04189461A (en) * 1990-11-21 1992-07-07 Hitachi Ltd Cutting jig and fixing device
JPH0514550A (en) * 1991-07-08 1993-01-22 Brother Ind Ltd Cordless video telephone system
JP2595697Y2 (en) * 1993-11-30 1999-05-31 株式会社日平トヤマ Work mounting device
CH690845A5 (en) * 1994-05-19 2001-02-15 Tokyo Seimitsu Co Ltd A method for positioning a workpiece, and apparatus therefor.
JPH09314550A (en) * 1996-06-04 1997-12-09 Tokyo Seimitsu Co Ltd Method for cutting material to be worked through wire saw
JP3137600B2 (en) * 1997-09-12 2001-02-26 株式会社日平トヤマ Workpiece crystal orientation adjustment method

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Also Published As

Publication number Publication date
CN103189157A (en) 2013-07-03
WO2012055052A1 (en) 2012-05-03
CN103189157B (en) 2016-09-28

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