US3911627A - Belt grinding machine adapted to grind a flat or curved surface - Google Patents

Belt grinding machine adapted to grind a flat or curved surface Download PDF

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Publication number
US3911627A
US3911627A US460722A US46072274A US3911627A US 3911627 A US3911627 A US 3911627A US 460722 A US460722 A US 460722A US 46072274 A US46072274 A US 46072274A US 3911627 A US3911627 A US 3911627A
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cylinders
workpiece
pressure
scanning
belt
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US460722A
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English (en)
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Karl Heesemann
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/04—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces
    • B24B21/06—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces involving members with limited contact area pressing the belt against the work, e.g. shoes sweeping across the whole area to be ground
    • B24B21/08—Pressure shoes; Pressure members, e.g. backing belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/16—Machines or devices using grinding or polishing belts; Accessories therefor for grinding other surfaces of particular shape

Definitions

  • the belt is driven and endless and passes over a conveyor on which workpieces each having a face to be ground, are located.
  • the belt runs over a flexible beam which can be bent by one or more of a plurality of piston and cylinder units some of which are fixed to and some mounted displaceably on the frame of the machine, each cylinder having a feeler-actuator which during the passage of a workpiece past the belt, comes into contact with the surface to be ground, or a template, and follows the curvature thereof.
  • Each feeler operates a valve to admit pressure fluid to or drain it from its cylinder so that the various cylinder actuations cause the beam and hence the belt to follow a path the curvature of which is that desired on the workpiece surface.
  • the present invention concerns a belt grinding machine or finisher for grinding plane, concave or convex workpiece surfaces, and comprising a motor-driven conveyor device, such as endless chains, belts or the like, moving the workpieces to be ground, an endless grinding belt circulating transversely or longitudinally to the direction of movement of the workpieces and located above the conveyor device, and a resilient pressure member, associated with the grinding belt, moving and holding the grinding belt against the surface of the workpiece to be ground by a plurality of pressure units spaced from eachtother in the direction of movement of the grinding belt and loaded on one or both ends.
  • a motor-driven conveyor device such as endless chains, belts or the like
  • Such belt grinding machines can grind plane plate-shaped workpieces having regular or irregular external shapes.
  • the belt grinding machine is provided with a grinding belt which is adaptable in a simple, reliable and accurate manner, to any particular shape of workpiece surface to be ground.
  • the grinding belt exerts a uniform specific grinding pressure on the entire grinding surface.
  • a belt grinding machine comprising a motor-driven conveyor device, carrying the workpieces to be ground, an endless grinding belt travelling above the conveyor transversely or longitudinally of the direction of movement of the workpieces, and a resilient pressure member associated with this grinding belt which is moved to keep the grinding belt against the workpiece surface to be ground by a plurality of pressure units spaced from each other in the direction of movement of the grinding belt of single or double acting type, wherein at least some pressure units are displaceable towards or away from the workpiece surface independently of the displacement of the pressure member of the pressure unit to adapt the pressure member to the form of the workpiece, whether concave or convex, to be ground.
  • the vertically displaceable hydraulic cylinders are connected by means of a transmission means, preferably a flexible transmission member, such as a Bowden cable pressure and traction device, to a control member which scans either the actual workpiece surface to be ground, a workpiece surface opposed to the workpiece surface to be ground and having an identical shape, or a template, circular template and translates its movement by the transmission means into a vertical displacement of the hydraulic cylinders; each hydraulic cylinder has its own control member and transmission means. It is preferable to arrange this control member below the hydraulic cylinder and to form it as a vertically pivotable scanning roller which scans the negative side of the workpiece and to connect it to the housing of the hydraulic cylinder by means of the Bowden cable device.
  • a transmission means preferably a flexible transmission member, such as a Bowden cable pressure and traction device
  • Each hydraulic cylinder is attached to a vertically displaceable member, such as a non-rotatable ball race, a second hydraulic cylinder or a track and pinion, vertically displaceable on a supporting beam carrying all the hydraulic cylinders. All the cylinders are provided in a housing, and may be hydraulically double-acting or single-acting with spring return, the piston rod of each cylinder extending downwardly out of the housing where it is connected to the resilient pressure member.
  • a vertically displaceable member such as a non-rotatable ball race, a second hydraulic cylinder or a track and pinion, vertically displaceable on a supporting beam carrying all the hydraulic cylinders. All the cylinders are provided in a housing, and may be hydraulically double-acting or single-acting with spring return, the piston rod of each cylinder extending downwardly out of the housing where it is connected to the resilient pressure member.
  • a pressure force normally keeps each piston in a raised position with respect to the pressure member, and the hydraulic fluid when applied, is subject to such a pressure that it moves the piston and, thus the pressure member, downwardly, overcoming any opposing force towards the workpiece surface to be ground so that a uniform pressure and, consequently, a uniform grinding pressure are exerted over the entire area of the pressure member by the hydraulic fluid.
  • the belt grinding machine of the present invention makes it possible, in a continuous process, to effect fully automatic grinding of plane or highly concave or convex workpiece surfaces, such as, for example, the surfaces of chair seats.
  • the workpiece is ground over its entire surface in a single operation, the edges of said workpiece being protected so that grinding attachments are avoided and a good quality of grind is achieved.
  • the resilient pressure member is adapted to the surface to be ground, according to its shape, in a simple, reliable and accurate manner by individual, vertically displaceable units (single or double-acting hydraulic cylinders, mechanical or motor-driven pressure devices) so that the pressure member is deformed with the grinding belt into the shape of the surface to be ground. All the pressure units (cylinders) exert a uniform force by their pressure member (hydraulic fluid loaded piston) on the grinding belt, so that a uniform predetermined surface pressure is produced over the entire surface of the pressure member.
  • the pressure member and the grinding belt are exactly shaped to the surface of the workpiece, and the grinding pressure is then produced independently by the members of the pressure units.
  • the vertical displacement of the hydraulic cylinders is simply and reliably carried out by means of a control member that scans the shape of the surface which corresponds to the surface of the workpiece to be ground, and which is formed by the workpiece itself, such as a matrix or a template, and transmits its movements to the corresponding hydraulic cylinder without loss or delay.
  • FIG. 1 shows a front view of a belt grinding machine
  • FIG. 2 shows a longitudinal section through a hydrau' lic cylinder and associated machine parts taken on the line I I of FIG. 1,
  • FIG. 3 shows a longitudinal section through a hydraulic cylinder, taken on the line II II of FIG. 1 for grinding a plane surface
  • FIG. 4 shows a front view of a plurality of adjacent hydraulic cylinders, with a pressure member and a workpiece to be ground, in the lowered and deformed position of the pressure member.
  • a belt grinding machine for grinding plane and highly concave or convex plate-like workpieces having regular or irregular outlines such as chair seats, is provided, in a frame 1 1, with a motor-driven conveyor device 12, which may include two endless chains or a belt continuously moving the workpieces 10 to be ground.
  • the two chains of the conveyor device 12 are arranged to be adjustable in the frame 11 in a horizontal plane relatively to the width of the particular workpiece, and spaced from each other transversely to the direction of travel.
  • an endless grinding belt 13 circulating transversely to the direction of movement of the workpiece, the belt being driven independently of the conveyor device 12 and held by a resilient pressure beam 14 extending substantially over the entire length of the lower portion of the grinding belt, between the two guide pulleys 15 of the grinding belt, in the grinding position against the workpiece surface 10a to be ground.
  • a plurality of pressure units in this case hydraulic cylinders 16, 17 are provided spaced apart in the direction of movement of the grinding belt and associated with the pressure member 14. They produce a movement of the pressure member 14 against the surface of the workpiece to be ground and hold it in the grinding position in order to achieve a uniform predetermined grinding pressure over the entire area of the pressure member, and they can also bring the pressure member 14 back to the raised position (no contact between grinding belt 13 and workpiece 10).
  • Each of the hydraulic cylinders l6, 17 has a housing 18, 19 which is indirectly supported on the machine base 11 and in which there is a double-acting piston 20 which is connected to a piston rod 21 extending at the workpiece end (lower end) out of the housing 18, 19.
  • This piston 20 is reciprocated (displaced up and down) by a hydraulic fluid, preferably air, and thus the pressure member 14 connected to the piston rod 21 receives the movement in the pressure and raised position; instead of air, oil or any other fluid may be used as hydraulic fluid.
  • Each hydraulic cylinder 16, 17 is provided with a supply channel 22, 23 feeding hydraulic fluid to each cylinder to bring its position to the raised (resting) position of the grinding belt, and a supply channel 24, 25 feeding hydraulic fluid to the piston to bring it to the pressure (working) position of the grinding belt.
  • a magnetically operated control valve 26, feeding the fluid for the grinding pressure to the hydraulic cylinder 16, 17 against the lifting pressure, or evacuating it from the cylinder 16, 17, is inserted in the fluid supply channel 24, 25.
  • the valve 26 is connected by means of an electric switching and control device, such as an adjustable time delay relay to a scanning member 27, actuating this time relay in dependence on the moving workpiece 10.
  • Individual hydraulic cylinders 17 may be displaceable (lowerable) towards the surface 10a of the workpiece, independently of the displacement of the piston effecting the grinding pressure, thus pre-adapting the pressure member 14 to the surface 10a of the workpiece in dependence on the concave or convex surface 10a of the workpiece to be ground, so that the pressure member 14 is set to the form of the surface of the workpiece by a vertical displacement of the hydraulic cylinder or cylinders 17, the piston 20 only providing the grinding pressure.
  • All the hydraulic cylinders 16, 17 are secured to a supporting beam 29 mounted by arms 28 on the machine frame 11 and extending in the direction of movement of the grinding belt. Some cylinders (16) are fixed and others (17) are vertically displaceable.
  • the pressure member 14 is divided over its length extending in the direction of movement of the grinding belt, into a centre portion grinding a concave or convex section of the surface, and into two end portions (left and right ends) grinding less curved or plane sections.
  • the vertically adjustable hydraulic cylinders 17 are provided in the centre portion, and the fixed hydraulic cylinders 16 being in both end portions.
  • the number of fixed and vertically displaceable hydraulic cylinders 16, 17 may be provided or added as desired.
  • Two pipes 30, 31 extending one above the other and closed at the ends are mounted on the supporting beam 20. They are hydraulic fluid channels.
  • the upper pipe 30 contains hydraulic fluid for lowering the pressure member, and the lower pipe 31 contains hydraulic fluid for raising the pressure member, the fluid in the pipe 30 being at a higher pressure than that in pipe 31.
  • the flxed hydraulic cylinders 16 are secured to the hydraulic pipes 30, 31 by screws 32 some of these screws being hollow and establishing a path for the flow of hydraulic fluid from the pipes 30, 31 into the hydraulic cylinders 16.
  • Each screw 32 forms part of a supply duct 22, 24.
  • the vertically displaceable hydraulic cylinders 17 also receive their hydraulic fluid from the two pipes 30, 3I through flexible tubes 23a, 25a, which extend from each pipe 30, 31 to each hydraulic cylinder supply 23, 25.
  • the double-acting piston 20 separates the cylinder housing 18, 19 into a lower chamber 33a, with which the supply channel 22, 23 communicates, and into an upper chamber 33b with which the supply channel 24, 25 from the valve 26 communicates.
  • the pressure medium in the lower chamber 33a always holds the piston 20 in the upper position determining the raised position of the pressure member.
  • the lowerable hydraulic cylinders 17 are in driving engagement with control members 34 scanning the surface 10a to be ground on the workpiece 10, a workpiece surface 10b opposed to the surface 10a to be ground and corresponding in shape to the surface 10a or a template corresponding to the surface 10a, so that a vertical displacement of the hydraulic cylinders 10 and, consequently, of the pressure member 14 is effected according to the movement of the control member.
  • Each hydraulic cylinder 17 is in driving engagement with its own control member 34.
  • Each hydraulic cylinder 17 is mounted to be reciprocated with its housing 19 at an angle, preferably at a right angle, to the plane of movement of the workpiece on a displaceable member 35. This displacement is parallel to the movements of the piston rods 21 which are also displaceable at an angle, preferably at a right an gle, to the plane of movement of the workpiece.
  • the vertically adjustable member 35 is a non-rotating ball race secured to the supporting beam 29 of the frame.
  • Each hydraulic cylinder 17 has its own ball race 35 which has a guide sleeve 37 which is secured in position in a receiving member 36 mounted on the supporting beam 29 and in which a guide rod 38 connected to the hydraulic cylinder housing 19 is mounted so as to be vertically displaceable but without rotation.
  • This ball race 35 is a preferred adjusting device; however, it is within the scope of the present invention to set the vertical position of each hydraulic cylinder 17 by a second hydraulic cylinder, a rack and pinion, or any other similar system, instead of using the ball race.
  • the control member 34 is located below each hydraulic cylinder 17 and includes a scanning roller or pin; the control member 34 may be located above the workpiece 10.
  • the control member 34 is held with pressure against the shaped surface to be scanned and is connected by a transmission member 39, such a Bowden cable or hydraulic pipe line with the displaceable pistons at the control member end, and at the hydraulic cylinder end, by a lever or rack to the control member 34.
  • a transmission member 39 such as a Bowden cable or hydraulic pipe line with the displaceable pistons at the control member end, and at the hydraulic cylinder end, by a lever or rack to the control member 34.
  • a Bowden cable remote control means operating with pressure and traction is preferably used as the flexible transmission member 39. It has a steel strip mounted on balls and the strip is secured at one end to a projecting arm 40 of the hydraulic cylinder housing 19 and at its other end to a lever 41 carrying the control member 34, near the control member. Such a Bowden cable remote control transmission member 39 transmits both pressure and traction forces.
  • the control member 34 includes a scanning roller 34a mounted to rotate on one end of the lever 41, and this lever 41 is mounted to pivot at its other end about an axis 42 which extends parallel to the plane of movement of the workpiece and transversely to the direction of movement of said workpiece; it is mounted on a bracket 43 secured to the frame 11.
  • a force pivoting the lever 41 in the direction of the surface b to be scanned acts on the lever 41 between the scanning roller 34a and pivot axis 42.
  • the force is derived from a hydraulic cylinder 44 with a doubleacting piston 45 and a piston rod 46 pivoted on the lever 41.
  • the housing 47 of the hydraulic cylinder 44 is provided with two hydraulic fluid connections 48, 49 through which hydraulic fluid flows through the connection 49, urging the piston 45 towards the lever 41 and thus always holding the scanning roller 34 in contact with the underside of the workpiece 10.
  • the other connection 48 evacuates the fluid during the lowering of the cylinders.
  • a compression spring may be provided, said spring urging the lever 41 towards the workpiece.
  • the compressiondevice formed by the hydraulic cylinder 44 or a compression spring, is mounted on the bracket 43.
  • One end of the flexible transmission members 39 is fixed to the supporting beam 29, and the other end on the bracket 43 for the transmission of movement without lost motion.
  • the double-acting hydraulic cylinders 16, 17 are replaced in another embodiment (not shown), by single acting cylinders, the piston 20 thereof being driven by a hydraulic fluid towards the workpiece 10 in the applied pressure position, and into the raised position by an opposing force such as a compression spring.
  • the pressure units 16, 17 may also be pressure devices (pressure units) which are reciprocated mechanically, for example, by springs, or they may be reciprocated by a motor.
  • Each pressure unit l6, 17 has a vertically displaceable pressure member (displaccable ram) which acts on the pressure member 14.
  • the scanning roller 27 is mounted on a pivotable lever 50 which co-operates with an electric switch which switches the time relay on and off.
  • All the electrical switching and control devices for the entire operation of the machine are located in a switch box 52 mounted on the machine frame 11.
  • the pressure beam 14 has a plurality of pressure rams 53 extending transversely to its length and secured to each piston rod 21 with a resilient compression plate 54 (preferably a steel plate) extending over the entire length and width secured to said rams.
  • a resilient compression plate 54 preferably a steel plate
  • These parts are connected together to form an elastic unit extending towards the workpiece 10.
  • This elastic pressure beam 14 has increased elasticity because of the above mentioned layers.
  • the pressure beam 14 may be provided with an air-filled cushion which replaces the layers and 56.
  • the above described belt grinding machine operates as follows:
  • the workpieces 10 to be ground are moved through the machine by means of the conveyor device 12. All the hydraulic cylinders 16, 17 are first held in an inoperative postion by the hydraulic fluid or compression spring acting upwardly on the piston 20, so that the pressure member 14 is disposed above the grinding plane.
  • the hydraulic fluid pressure determines the grinding pressure with which the grinding belt 13 is held by the beam 14 against the workpiece surface 10a to be ground, and which is uniform over the entire length of the pressure beam.
  • the stroke of the piston 20 in the directin of the workpiece 10 is small, but sufficient for grinding contact with the workpiece 10 to be established with the desired pressure.
  • Plane workpiece sur faces 10a are disposed in the region of the fixed hydraulic cylinders 16 and in this case the slight descending movement of the pressure member 14 is only to obtain the necessary grinding pressure.
  • Concave or convex or mixed concave and convex workpiece surfaces 10a which project by at least 1 mm out of a plane surface, are machined by the other section of the pressure member in which the vertically dis-' placeable hydraulic cylinders 17 are located, said cylinders producing by their additional vertical displacement the shaping of the pressure member 14 to the workpiece surface 10a to be ground.
  • Each scanning roller 34a associated with a vertically displaceable hydraulic cylinder 17 scans a shaped surface which is preferably formed by the workpiece surface lb opposed to the surface a to be ground, and identical in shape. In response to the greater or lesser curvature of this surface 10b the scanning roller 34a is pivoted about its pivotal axis 42 and transmits this pivotal movement to the transmission member 39 which effects a vertical displacement of the individual hydraulic cylinders 17 which then deform the pressure beam 14 by their displacement and shape it to the workpiece surface 100 to be ground. Grinding pressure from the vertically displaced hydraulic cylinders 17 is applied by their piston rod displacement, effected independently of the vertical displacement by the hydraulic fluid.
  • the scanning roller 37 leaves the workpiece 10 and resets the switch 51 which in turn deenergizes the time relay and the valve 26 so that the supply of fluid is interrupted and a return flow of fluid simultaneously applied so that the piston rod 21 returns upwardly and the pressure member 14 moves into the raised inoperative position.
  • the grinding belt 13 moves transversely to the flow direction of the workpieces 10.
  • the driving belt 13 it is also within the scope of the present invention for the driving belt 13 to move in the direction of travel of the workpieces.
  • the hydraulic cylinders l6, 17 not required in a grinding operation may be switched on or off manually, individually or in groups or automatically switched on or off by elements scanning the workpieces 10.
  • the scanning of the shape of the workpiece surface 10a to be ground may be effected on the reverse side of the workpiece or on a substitute workpiece 10, or on a template located near the grinding area, above or below the plane of movement of the workpiece.
  • the grinding belt 13 with pressure member 14 and hydraulic cylinders 16, 17 is preferably made as a unit to be vertically adjustable in the machine frame 11 relatively to the plane of contact of the conveyor device 12.
  • a belt grinding machine comprising a frame, conveying means on said frame for conveying workpieces to be ground along a first path, endless grinding belt means operably overlying said first path, a flexible pressure member overlying a portion of said belt means and extending transversely entirely across said first path, a support member fixedly mounted on said frame overlying said pressure member, a plurality of motor means having cylinders supported upon said support member and plunger means displaceable within said cylinders and engageable with spaced portions of said pressure member for pressing said pressure member against said belt means to press said belt means against workpieces conveyed along said first path, mounting means mounting at least some of said cylinders on said support member for movement toward and away from said pressure member, a plurality of first control means respectively coupled to each of said motors for independently displacing the plunger means of each motor to provide grinding pressure, and a plurality of second control means respectively coupled to each of said at least some of said cylinders for independently shifting the individual last mentioned cylinders toward and away from said pressure member in accord
  • each of said second control means comprises scanning means engageable with a scanning surface on said workpiece having a curvature variable longitudinally of the direction of movement of said workpiece along said first path, pressure means for pressing said scanning means against said scanning surface, and motion transmitting means for transmitting displacement of said scanning means to one of said at least some of said cylinders.
  • said scanning means comprises an arm pivotably mounted at one end on said frame, and a scanning roller rotatably mounted at the opposite end of said arm, said pressure means being engaged between said frame and an intermediate portion of said arm and said motion transmitting means being coupled between said arm and said one of said cylinders.
  • said mounting means comprises a guide member fixedly secured to each of said at least some of said cylinders and a ball guide mounted upon said support member for slideably guiding said guide member in non-rotary reciprocating movement.
  • first control means comprises first scanning roller means engageable with the upper surface of a workpiece and said second control means comprises second scanning roller means engageable with the lower side of a workpiece.
  • said first scanning roller means comprises a first scanning roller for each of said cylinders of both of said first and said second groups, each first scanning roller means being operable to control the displacement of its plunger means in accordance with-the position of its first spanning roller
  • said second scanning means comprises a second scanning roller for each of said second group of cylinders only, and means for transmitting displacement of each second scanning roller to its associated cylinder.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
US460722A 1973-04-21 1974-04-15 Belt grinding machine adapted to grind a flat or curved surface Expired - Lifetime US3911627A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2320345A DE2320345A1 (de) 1973-04-21 1973-04-21 Bandschleifmaschine

Publications (1)

Publication Number Publication Date
US3911627A true US3911627A (en) 1975-10-14

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Application Number Title Priority Date Filing Date
US460722A Expired - Lifetime US3911627A (en) 1973-04-21 1974-04-15 Belt grinding machine adapted to grind a flat or curved surface

Country Status (10)

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US (1) US3911627A (en。)
JP (1) JPS5030197A (en。)
AT (1) AT325451B (en。)
CH (1) CH568817A5 (en。)
DE (1) DE2320345A1 (en。)
ES (1) ES425525A1 (en。)
GB (1) GB1437908A (en。)
IT (1) IT1011313B (en。)
PL (1) PL90677B1 (en。)
SE (1) SE407915B (en。)

Cited By (15)

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US4527359A (en) * 1984-04-23 1985-07-09 Timesavers, Inc. Segmented platen with diaphragm cylinder control
US4601134A (en) * 1984-01-21 1986-07-22 Karl Heesemann Maschinenfabrik Gmbh & Co. Kg Belt grinder having pressure pads with individually variable contact pressures
US4621459A (en) * 1984-04-23 1986-11-11 Timesavers, Inc. Segmented platen with diaphragm cylinder control
US5613901A (en) * 1995-08-30 1997-03-25 Weber; Georg Apparatus for pressing a circulating grinding belt
WO2002032623A1 (en) * 2000-10-16 2002-04-25 Viet S.P.A. Pressing device for sanding machine
US20050253468A1 (en) * 2002-04-09 2005-11-17 Daniele Zampieri Rim structure particularly for cycle wheel with variable magnetic field electric generator
EP1038633B1 (fr) * 1999-03-23 2007-02-21 Spms Honimatic Ensemble d'usinage de pièces par abrasif, notamment de superfinition
US20070184759A1 (en) * 2006-02-06 2007-08-09 Samsung Electronics Co., Ltd. Platen assembly, apparatus having the platen assembly and method of polishing a wafer using the platen assembly
EP2039465A1 (en) * 2007-09-24 2009-03-25 Viet S.P.A. Pushing device for a pad of a polishing machine
US20100248602A1 (en) * 2007-11-14 2010-09-30 Honda Motor Co., Ltd. Shaft portion finishing device
CN101885159A (zh) * 2009-05-15 2010-11-17 罗伯特.博世有限公司 磨具压紧单元和具有磨具压紧单元的带式磨削机
US9272384B2 (en) 2011-05-20 2016-03-01 Columbia Insurance Company Pattern sander device, system and method
US20160101496A1 (en) * 2013-05-14 2016-04-14 Supfina Grieshaber Gmbh & Co. Kg Device for band finishing a workpiece
US20170087684A1 (en) * 2015-09-28 2017-03-30 Saint-Gobain Abrasives, Inc. Method and system for removing material from a workpiece
US20200047305A1 (en) * 2018-08-09 2020-02-13 Viet Italia S.R.L. Sanding machine for the sanding/finishing panels made of wood, metal, or the like

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JPS5338795A (en) * 1976-09-22 1978-04-10 Toray Industries Treating method for preventing yellowing of polyamide
JPS55161827A (en) * 1979-06-06 1980-12-16 Teijin Ltd Modification of polyester molded article
JPS5653278A (en) * 1979-09-28 1981-05-12 Wakayama Prefecture Wrinkleproof * shrinkproof and fireproof process of cellulose fiber
FR2496533A1 (fr) * 1980-12-23 1982-06-25 Ratier Figeac Soc Machine pour realiser des pieces ayant des surfaces gauches de configuration determinee
US4743267A (en) * 1982-06-21 1988-05-10 International Yarn Corporation Of Tennessee Process for improving polymer fiber properties and fibers produced thereby
US4672005A (en) * 1984-03-01 1987-06-09 Intera Corporation Process for improving polymer substrate properties, and modified polymers produced thereby
DE3426595A1 (de) * 1984-07-19 1986-01-30 Paul Ing.(grad.) 6925 Eschelbronn Ernst Vorrichtung zum schleifen von rahmenartigen werkstuecken
EP0227859A1 (de) * 1984-12-04 1987-07-08 Carborundum Schleifmittelwerke GmbH Verbesserter Schleifschuh zum Andrücken eines umlaufenden Schleifbandes einer Bandschleifmaschine an das zu bearbeitende Werkstück und Verfahren zum Schleifen plattenförmiger Werkstoffe
DE3643914A1 (de) * 1986-12-22 1988-06-30 Zeiss Carl Fa Verfahren und vorrichtung zum laeppen bzw. polieren optischer flaechen
DE3716832C2 (de) * 1987-05-20 1995-06-14 Boettcher Renardy & Co Gmbh Druckbalken für eine Bandschleifmaschine
JPH07115290B2 (ja) * 1991-03-15 1995-12-13 長谷川鉄工株式会社 ピンチローラー付ベルトサンダー
US7371159B2 (en) * 2002-07-22 2008-05-13 Stephan Kundig Devices with angularly adjustable sanding units
CN116810583B (zh) * 2023-05-11 2025-06-27 东莞嘉丰机电设备有限公司 一种基于人工智能自动化机箱生产设备

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US3167889A (en) * 1962-02-07 1965-02-02 Walter Jacobi & Sons Inc Apparatus for finishing wood and the like
US3374583A (en) * 1965-09-20 1968-03-26 Walter Jacobi & Sons Inc Apparatus for finishing surfaces

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4601134A (en) * 1984-01-21 1986-07-22 Karl Heesemann Maschinenfabrik Gmbh & Co. Kg Belt grinder having pressure pads with individually variable contact pressures
US4527359A (en) * 1984-04-23 1985-07-09 Timesavers, Inc. Segmented platen with diaphragm cylinder control
US4621459A (en) * 1984-04-23 1986-11-11 Timesavers, Inc. Segmented platen with diaphragm cylinder control
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Also Published As

Publication number Publication date
JPS5030197A (en。) 1975-03-26
CH568817A5 (en。) 1975-11-14
GB1437908A (en) 1976-06-03
AT325451B (de) 1975-10-27
ES425525A1 (es) 1976-06-01
SE407915B (sv) 1979-04-30
PL90677B1 (en。) 1977-01-31
IT1011313B (it) 1977-01-20
DE2320345A1 (de) 1974-11-07

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