US20020106981A1 - Double moving column grinder with simultaneous two wheel grinding - Google Patents

Double moving column grinder with simultaneous two wheel grinding Download PDF

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Publication number
US20020106981A1
US20020106981A1 US10/113,760 US11376002A US2002106981A1 US 20020106981 A1 US20020106981 A1 US 20020106981A1 US 11376002 A US11376002 A US 11376002A US 2002106981 A1 US2002106981 A1 US 2002106981A1
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United States
Prior art keywords
wheelheads
columns
grinding
carriage
wheelhead
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.)
Abandoned
Application number
US10/113,760
Inventor
Salvador Aznal
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.)
Danobat S Coop Ltda
Original Assignee
Danobat S Coop Ltda
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
Priority to ES200000896A priority Critical patent/ES2168058B1/en
Priority to ESP200000896 priority
Priority to US09/816,604 priority patent/US20010029160A1/en
Application filed by Danobat S Coop Ltda filed Critical Danobat S Coop Ltda
Priority to US10/113,760 priority patent/US20020106981A1/en
Assigned to DANOBAT, S. COOP. reassignment DANOBAT, S. COOP. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AZNAL, SALVADOR
Publication of US20020106981A1 publication Critical patent/US20020106981A1/en
Abandoned legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q39/00Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation
    • B23Q39/02Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station
    • B23Q39/021Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station with a plurality of toolheads per workholder, whereby the toolhead is a main spindle, a multispindle, a revolver or the like
    • B23Q39/025Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station with a plurality of toolheads per workholder, whereby the toolhead is a main spindle, a multispindle, a revolver or the like with different working directions of toolheads on same workholder
    • B23Q39/026Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station with a plurality of toolheads per workholder, whereby the toolhead is a main spindle, a multispindle, a revolver or the like with different working directions of toolheads on same workholder simultaneous working of toolheads
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/01Frames, beds, pillars or like members; Arrangement of ways
    • B23Q1/012Portals
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q39/00Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation
    • B23Q39/04Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being arranged to operate simultaneously at different stations, e.g. with an annular work-table moved in steps
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00Other grinding machines or devices
    • B24B27/0076Other grinding machines or devices grinding machines comprising two or more grinding tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00Component parts such as frames, beds, carriages, headstocks
    • B24B41/02Frames; Beds; Carriages

Abstract

A grinding machine for grinding bulky workpieces of considerable length, such as frames, columns and tables of machine tools. Said grinding machine comprises at least one machining table on which a workpiece to be ground is placed, at least two columns linked to a single carriage, said carriage moving longitudinally over a base parallel to said machining table, and at least one wheelhead affixed to each of said columns, each one of said wheelheads comprising its own independently operated vertical and transverse drive means and at least one of said wheelheads being capable of angle movement. So, said wheelheads have a common longitudinal movement and independent vertical and transverse movements, so that said wheelheads can work simultaneously.

Description

  • The present invention is a Continuation-In-Part (CIP) of the originally filed U.S. patent application Ser. No. 09/816,604.[0001]
  • TECHNICAL FIELD
  • The present invention relates to machines for grinding workpieces, and more specifically to machines for grinding such workpieces as frames, columns and tables of machine tools. [0002]
  • PRIOR ART
  • The grinding of bulky workpieces of considerable length such as frames, columns and tables of machine tools requires the use of two different types of wheelheads: tangential wheelheads and angle-movement wheelheads (so-called universal wheelheads). [0003]
  • The use of conventional flat grinders with a single column for grinding workpieces of this type is well known. For this purpose, besides using the wheelhead mounted on the grinding machine column, another carriage with another wheelhead is fitted to the side of said column, said additional wheelhead generally having angle movement. The machining table moves in relation to the column during the grinding process. This kind of grinding machines cannot work with both wheels simultaneously. [0004]
  • The use of bridge grinders for grinding workpieces of this type is also well known. Bridge grinders are grinding machines with two opposing columns, one on either side of a machining table, and linked transversely by a cross rail. Two wheelheads are mounted on said cross rail, each of said wheelheads having its own vertical drive means and its own transverse drives means (up to a limited travel), and one of said wheelheads generally being capable of angle movement. The cross rail may be fixed or vertically movable. During the grinding process, the machining table moves in respect of the columns and the cross rail. This kind of machines cannot work with both wheelheads simultaneously, as, although said wheelheads have their own drive means, the actual machine frame with the cross rail prevents the wheelheads from working at the same time because they would have to cross over as the transverse movement of both wheelheads is effected on a single support bracket. [0005]
  • DISCLOSURE OF THE INVENTION
  • The object of the invention is to provide a grinder for grinding bulky workpieces of considerable length, such as frames, columns and tables of machine tools. [0006]
  • The grinding machine of the invention comprises at least one machining table on which a workpiece to be ground is placed, at least two columns linked to a single carriage, said carriage moving longitudinally over a base parallel to said machining table, and at least one wheelhead affixed to each of said columns, each one of said wheelheads comprising its own independently operated vertical and transverse drive means and at least one of said wheelheads being capable of angle movement. So, said wheelheads have a common longitudinal movement and independent vertical and transverse movements, so that said wheelheads can work simultaneously. [0007]
  • As both wheelheads work simultaneously, output is practically doubled. In fact, the total grinding time is the grinding time of the wheelhead that has the longer process, as the grinding time of the other wheelhead is included in the grinding time of the wheelhead that has the longer process. [0008]
  • Since it is the columns that move and the wheelheads have all their movements in relation to said columns, the grinding machine can grind workpieces placed on different aligned machining tables consecutively. Thus, the machine can be grinding the workpiece of one machining table, while the operator handles the workpiece of another table. In this way, the workpiece change time is nil. [0009]
  • On the other hand, taking into account the automatic workpiece change, the space occupied by the machine is smaller than that of a bridge machine and even less than a conventional grinding machine, as the latter requires palletizing systems. Moreover, there is a considerable saving in costs especially in relation to the use of a bridge machine. These and other advantages will become apparent in the detailed description of an embodiment of the invention.[0010]
  • DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is an elevational view of an embodiment of the machine of the invention. [0011]
  • FIG. 2 is a profile view of the embodiment of FIG. 1 according to section II-II. [0012]
  • FIG. 3 is a profile view of the embodiment of FIG. 1 according to section III-III. [0013]
  • FIG. 4 is a profile detailed view of the carriage and the base of the embodiment of FIG. 1. [0014]
  • DETAILED DISCLOSURE OF THE INVENTION
  • In the embodiment of FIGS. [0015] 1 to 4, the grinding machine 1 comprises a machining table 11 on which a workpiece 12 to be ground is placed, two columns 2 and 3 linked to a single carriage 8, said carriage 8 moving longitudinally over a base 9 parallel to said machining table 11, and one wheelhead 4 provided with a grinding wheel 6 and affixed to column 2 and one wheelhead 5 provided with a grinding wheel 7 and affixed to column 3. The wheelhead 5 has vertical drive means 50 (shown in FIGS. 1 and 3) and horizontal drive means 51 (shown in FIG. 3). The wheelhead 4 has vertical drive means 40 (shown in FIGS. 1 and 2) and horizontal drive means (not shown for clarity). The vertical drive means 50 and the horizontal drive means 51 of wheelhead 5 are operated independently of the vertical drive means 40 and the horizontal drive means of wheelhead 4, an vice versa.
  • So, the wheelheads [0016] 4 and 5 have a common longitudinal movement according to a direction A (shown in FIG. 1), and independent vertical and transverse movements, so that said wheelheads 4 and 5 can work simultaneously: the wheelhead 4 has a movement according to a direction B and a movement according to a direction C (shown in FIG. 2), and the wheelhead 5 has a movement according to a direction D and a movement according to a direction E (shown in FIG. 3).
  • The wheelhead [0017] 5 only has tangential movement. The movements that said wheelhead 5 has in relation to the column 3 are the usual ones possessed by the wheelheads on flat surface grinding machines. FIG. 3 shows the wheelhead 5 in three different positions. The wheelhead 4 is capable of being moved also in an angular direction, which permits the grinding of workpieces of widely varying shapes. Said wheelhead 4 is a so-called universal wheelhead and has all the movements possessed by wheelheads of this type. Angular movement of said wheelhead 4 is provided by a rotary plate 4 a. FIG. 2 shows the wheelhead 4 in three different positions. The columns 4 and 5, and consequently the wheelheads 4 and 5, are facing each other.
  • The workpieces to be ground are bulky items of considerable length, not usually more than one meter wide, such as frames, columns and tables of machine tools. The grinding wheels [0018] 4 and 5 are large diameter wheels (up to 600 mm) and have high-power servomotors. The grinding with both wheels is carried out at the same time with a single numeric control that works in two channels with specific software.
  • The movement of the carriage [0019] 8 over the base 9 is effected by means of a hydrostatic slideway 90, so as to be able to reach typical conventional grinding speeds (30 m/min). With reference to FIG. 4, said hydrostatic slideway 90 includes longitudinal guides 91 on which the carriage 8 slides, said guides 91 having chambers 17 with oil under pressure for lubrication. With said oil under pressure the necessary rigidity of machine 1 is achieved.
  • The hydrostatic slideway [0020] 90 enables considerable accelerations and decelerations to be achieved and, furthermore, it ensures that the movement of the columns is uniform, thus preventing the appearance of a buckling effect in said columns. In the embodiment of FIG. 1 columns 2 and 3 are linked at the top by means of a cross member 10 to prevent said buckling effect. With the use of the hydrostatic slideway 90, said cross member 10 is not necessary.
  • The longitudinal movement of the carriage [0021] 8 is governed by means of a rack and pinion system. With reference to FIG. 4 again, a pinion 13 is mounted on the axis of a reducer 16 that is fixed to the carriage 8. Said reducer 16 is actuated by a servomotor not shown). Said pinion 13 is geared to a rack 14 that is fixed to the base 9. The servomotor turns the reducer 16 and the rotary movement of said reducer 16 is converted into linear movement of the carriage 8 by means of the pinion 13 and the rack 14. An encoder placed in the servomotor controls the location of the carriage 8.
  • As the assembly formed by carriage [0022] 8, columns 2 and 3 and their respective wheelheads 4 and 5 move en bloc on base 9, it is possible to install various aligned machining tables 11, each with its respective workpiece 12, along the whole length of the base 9 and parallel to said base 9. This means that the machine 1 may be grinding workpiece 12 of one machining table 11, while the operator is handling the workpiece 12 of another machining table 11.

Claims (4)

What is claimed is:
1. A grinding machine for grinding bulky workpieces of considerable length, such as frames, columns and tables of machine tools, comprising:
at least one machining table on which a workpiece to be ground is placed;
at least two columns linked to a single carriage, said carriage moving longitudinally over a base parallel to said machining table; and
at least one wheelhead affixed to each of said columns, each one of said wheelheads comprising its own independently operated vertical and transverse drive means and at least one of said wheelheads being capable of angle movement;
thereby said wheelheads having a common longitudinal movement and independent vertical and transverse movements, so that said wheelheads can work simultaneously.
2. The grinding machine of claim 1, wherein said columns are facing each other.
3. The grinding machine of claim 1, wherein the movement of said carriage over the base is effected by means of a hydrostatic slideway.
4. The grinding machine of claim 1, wherein the longitudinal movement of the carriage is governed by means of a rack and pinion system.
US10/113,760 2000-04-07 2002-03-29 Double moving column grinder with simultaneous two wheel grinding Abandoned US20020106981A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ES200000896A ES2168058B1 (en) 2000-04-07 2000-04-07 DOUBLE MOBILE COLUMN RECTIFIER WITH SIMULTANEOUS RECTIFICATE WITH TWO SPRINGS.
ESP200000896 2000-04-07
US09/816,604 US20010029160A1 (en) 2000-04-07 2001-03-23 Double moving column grinder with simultaneous two wheel grinding
US10/113,760 US20020106981A1 (en) 2000-04-07 2002-03-29 Double moving column grinder with simultaneous two wheel grinding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/113,760 US20020106981A1 (en) 2000-04-07 2002-03-29 Double moving column grinder with simultaneous two wheel grinding

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US09/816,604 Continuation-In-Part US20010029160A1 (en) 2000-04-07 2001-03-23 Double moving column grinder with simultaneous two wheel grinding

Publications (1)

Publication Number Publication Date
US20020106981A1 true US20020106981A1 (en) 2002-08-08

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007131686A1 (en) * 2006-05-11 2007-11-22 Eew Maschinenbau Gmbh Supporting structure for a machining unit
ITTO20100599A1 (en) * 2010-07-12 2012-01-13 Famar S R L MULTI-SPINDLE TOOL MACHINE WITH VIBRATION DAMPING SYSTEM
CN106926101A (en) * 2017-03-06 2017-07-07 安徽鑫艺达抛光机械有限公司 A kind of square chest numerical control sander
CN111791122A (en) * 2020-07-10 2020-10-20 泉州市大鲨鱼机械科技有限公司 Sleeper grinding machine removes actuating mechanism

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007131686A1 (en) * 2006-05-11 2007-11-22 Eew Maschinenbau Gmbh Supporting structure for a machining unit
ITTO20100599A1 (en) * 2010-07-12 2012-01-13 Famar S R L MULTI-SPINDLE TOOL MACHINE WITH VIBRATION DAMPING SYSTEM
CN106926101A (en) * 2017-03-06 2017-07-07 安徽鑫艺达抛光机械有限公司 A kind of square chest numerical control sander
CN111791122A (en) * 2020-07-10 2020-10-20 泉州市大鲨鱼机械科技有限公司 Sleeper grinding machine removes actuating mechanism

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Legal Events

Date Code Title Description
AS Assignment

Owner name: DANOBAT, S. COOP., SPAIN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:AZNAL, SALVADOR;REEL/FRAME:012770/0302

Effective date: 20020314

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION