Classifications

• • 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
  • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
  • B24B31/02—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving rotary barrels
  • B24B31/027—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving rotary barrels with additional oscillating movement
• • 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
  • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
  • B24B31/02—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving rotary barrels
• • 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
  • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
  • B24B31/02—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving rotary barrels
  • B24B31/0224—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving rotary barrels the workpieces being fitted on a support

Definitions

• the invention relates to a device for sanding and / or ginning wooden parts, said device comprising a closed tank containing an abrasive material in which a workpiece support is provided, said support being driven by vibratory movements.
• finishing operations such as sanding, ginning, etc. have not yet found satisfactory solutions and in most cases require manual intervention.
• Sanding a well-known technique, and ginning, which consists in removing the irregularities which appear during staining or varnishing of the woods, as a result of the straightening of the fibers, are lengthy operations and all the more delicate as the surfaces are worked.
• the polishing piece is fixed to a support penetrating into an enclosure containing an abrasive material.
• the support is subjected to alternating longitudinal and rotational movements.
• the part, partially immersed in the abrasive material, is successively sanded or ginned on all its faces.
• a compartment has been provided into which the abrasive material penetrates during the tilting of the enclosure. This tilting takes place around bearings fixed at the end of the enclosure opposite to that holding the support.
• the device is designed to treat a chair.
• the device according to the invention implements a sanding and / or ginning process similar to that used in the cited application, but is designed so as to avoid the effects of compaction of the abrasive material and to eliminate large displacements of material when loading or unloading the treated parts.
• Figure 1 is a front view of a device according to the invention.
• Figure 2 is a vertical sectional view along II-II of Figure 1.
• the Figure 3 is a horizontal sectional view along III-III-of Figure 1.
• Figure 4 is a vertical sectional view of a device according to a second embodiment.
• Figures 5 and 6 show. a side view in partial section and a top view of a device for fixing the parts to be treated.
• Figure 7 is a front view of a variant of the device according to the invention.
• Figures 1, 2, 3 ⁇ ontrent different views of a device available for sanding and / or ginning of wooden parts according to one embodiment of the invention.
• the device comprises an inner tank 1 of horizontal cylindrical or polygonal axis, coaxial with an outer tank 2 cylindrical.
• This assembly is produced in the form of a tank with double side wall.
• the side wall 2 cooperates with rotation drive means consisting of rollers or rollers with horizontal axes 3, 4 mounted on a cradle 5 fixed to the ground.
• the rollers or rollers are integral with axes having a length at least equal to that of the tank and rotate in bearings 6, 7 fixed on the cradle.
• Flanges 8 are provided at the outer ends of the rollers or rollers which prevent longitudinal movements.
• one of the axes of the rollers is driven and the other idle.
• the axis 3 is driven by a motor 9 via a reduction gear 10 and a coupling 11.
• the motor 9 is a motor with speed variation.
• One of the bottoms 12 of the inner tank 1, directly accessible, is provided with a semi-circular door 13 kept closed by a door latch 1-4 and carrying a fitting 23 in the axis of the tank for connection to a suction or blowing device.
• the inner tank 1 has over its entire length a hatch 15 defined, approximately between the two bottoms 12, 16 and two generators 17, 18 located between the bottom of the door 19 and the side wall of the tank 1 relative to its axis, the cord joining the generators 17, 18 being approximately parallel to the bottom of the door 19.
• a flap 20 is articulated according to, for example, the generator 17 and is held in the closed position by a trap latch 21.
• the width of the flap 20 is such that the latter, when it is open (FIG. 1), comes to rest by its edge 22 against the internal lateral surface of the external wall 2, thus sharing the volume comprised between the two walls. The function of this flap will be explained later.
• the bottom 16 of the inner tank 1 has in the axis an opening 24 through which a movable assembly 25 passes at one end of which is fixed the support 44 of the parts to be treated.
• the movable assembly 25 consists of a cylindrical shaft 26 maintained, at its end opposite to that carrying the support, in a ball joint 27 whose bearing is fixed by a support plate 28 to a chassis formed by the fairing 29 of the movable assembly, the fairing being fixed to the bottom 16 of the tank.
• the ball joint is protected from dust by bellows 30.
• the movable element 25 is set in motion by a drive device which, in the embodiment of Figures 2 and 3, comprises holding rods and alternative linear drive means.
• the shaft 26 is held near the end carrying the support and outside the tank by a set of two links 31, 32 arranged respectively in vertical and horizontal planes with respect to the frame 5.
• the vertical link 31 carries at one end a stirrup 33 whose branches cooperate with cylindrical pins 34 fixed diametrically on the shaft 26.
• the other end of the link is movable around an axis a, b, or c fixed in a console 35 secured to the bottom of the tank.
• the points of articulation a, b, c of the vertical link on the console give it an inclination of between 90 and 45 ° relative to the horizontal materialized by the axis of the moving assembly.
• the horizontal link 32 is fixed at 90 ° to the vertical link 31, one of the ends being fixed to the shaft 26 by means of a stirrup 36, and the other end being fixed to a console 37 secured to the bottom of tank 16.
• This console also has several points of articulation a, b, c making it possible to obtain an inclination of between 90 and 45 ° relative to the horizontal.
• the shaft 26 is driven longitudinally by alternating linear drive means 38 comprising an electric motor 39, fixed to the bottom of the tank.
• the motor shaft is provided with an eccentric 40 cooperating with the cylindrical bore of the foot of a connecting rod 41 whose head drives a stirrup 42 fixed on the shaft 25.
• the commissioning of the motor 39 drives the moving element 25 in a vibratory movement which breaks down along three rectangular axes, two of which are determined by the links 31, 32 and the third, by the axis of the moving element 25.
• L amplitude of movement according to the vertical and horizontal components is adjustable by moving the attachment point a, b, c of the rods on the consoles. These amplitudes increase with the inclination of the rods.
• the end of the fairing 29 carries a rotary current collector 43 allowing the supply of the motor 39.
• the movable element 25 carries at its free end means for removable attachment of the workpiece support 44. These means consist of a flange 45 fixed to the end of the shaft 26 onto which a cross member 46 of the support is bolted .
• the passage of the shaft 26 in the opening 24 of the bottom 16 of the tank is sealed by a sealing bellows 47 whose edges are respectively fixed to the flange 45 of the shaft 26 and to a flange 48 fixed on the edge of opening 24.
• the parts support shown in FIGS. 5 and 6 is more particularly intended to hold chairs (shown in dashed lines) by their frame and allows the simultaneous processing of two chairs.
• the cross member 46 carries symmetrically with respect to its middle two parallel columns 49, 50 forming with it a U-shaped part.
• a fixing frame 51 consisting of two longitudinal beams 52, 53 connected by spacers 54, 55. The distance between the spacers is such that it corresponds approximately to the interior distance between two rings 56, 57 capable of cooperating with the columns 49, 50.
• the elements of the frame fixing 51 are symmetrical with respect to the axis of symmetry passing through the center of the two columns.
• the projecting ends of the side members carry means for locking the chair frame.
• These means consist of a collar 58 capable of sliding on a free end of a spar and carrying an eccentric lever 59 intended to bear on one side 60 of the chair frame, the collar being blocked on the spar by wedging; and a stop 61 fixed to the other free end of the spar and maintaining the opposite side 62 of the chair frame.
• the rings 56 and 57 to which the fixing frame 51 is fixed are held on the columns, either removably by known clamping means, or permanently by welding, as shown in FIGS. 5, 6.
• a second fixing frame 63 similar to the first 51 is placed on the end of the columns, but the rings of which are held at one end by an expandable locking device 64 which comprises, so known, an elastic ring 65 capable of being compressed longitudinally between a fixed stop 66 and a movable stop 67 by means of an eccentric 68.
• the device for dragging the mobile assembly shown in FIG. 4, it consists of three vibration generators 69, 70, 71 mounted on a structure 72 fixed to the fairing 29 by means of rubber pads 73.
• the generators are arranged on the structure so that their actions are exerted in three directions perpendicular to each other.
• the structure 72 is provided with a shaft 74 passing through the bottom 16 of the tank 1 and carrying, as in the previous example, a support 44 for parts to be treated.
• the vibration generators are constituted, for example, by unbalance motors.
• the abrasive material is in the form of balls or pellets which fill at least half the inner tank.
• the device is allowed to stop, the load of abrasive material being contained in the inner tank 1, the flap 20 of the flap being in the closed position and retained by the flap latch 21, the door 13 being closed by the latch door 14.
• the door bottom 19 is brought approximately into a horizontal position by starting the motor 9 which drives the roller 3.
• the rotation of the tank is then stopped and the flap 20 is opened.
• the abrasive material flows through the hatch 15 in the space between the wall of the inner tank 1 and the outer wall 2, the edge 22 of the flap 20 resting against the inner surface of the wall 2 limits the flow of the material on one side.
• the emptying can be helped by the implementation of an alternating movement of the tank of small amplitude.
• the level of the abrasive material drops below the bottom of the door and allows the door 13 to be opened.
• the support 44 for pieces is placed on which two chairs to be treated are fixed.
• the drive motor 39 of the moving equipment is stopped and the bottom of the door is brought to a horizontal position. Or open the hatch for. evacuate the abrasive material from the inner tank and the parts support 44 is removed.
• the vibration frequency is between 3 and 30 hertz and the amplitude between zero and ⁇ 20 mm.
• connection 23 The dust resulting from the treatment is evacuated by a vacuum device via the connection 23. This same connection allows the separation of the dust attached to the abrasive material by blowing.
• FIG. 7 illustrates an optimal variant of the embodiment of the invention.
• the previously described members have the same references.
• the difference lies in the fact that the cradle 70 on which the rotary assembly rests is itself mobile by rotation about the axis 71 supported by bearings (not shown) integral with one end of the fixed cradle 72.
• the other end of the cradle 76 is equipped with a. or several jacks 73 of which the movable part (s) 74 is (are) articulated at 75 in the cradle 70.
• the implementation of the jack or jacks 73 by well known means, for example hydraulic, makes it possible to tilt the rotating assembly from the horizontal position to the inclined position and vice versa. This tilting operation along the longitudinal axis can be done while rotating the tank and vibrating the support.
• the device according to the invention makes it possible to treat the object globally. It uses current technology and requires only a few specific tools. Its cost is low and its maintenance simple. It can work with a variety of abrasive products that can be chosen according to the job.
• the rotation of the tank and object to be treated allows, on the one hand, the mixing of the abrasive (therefore avoids compaction) and, on the other hand, the passage through the abrasive of all the parts of the object to be treated even if the tank is not completely filled with abrasive.
• the interior wall can be coated with spray gun rubber or with a removable jacket, for example glued.
• the invention finds a particularly interesting application in ginning and sanding wooden objects and in particular furniture.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
• Disintegrating Or Milling (AREA)
• Polishing Bodies And Polishing Tools (AREA)
• Chemical And Physical Treatments For Wood And The Like (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9269897

Family Applications (1)

Country Status (4)

Cited By (1)

Families Citing this family (3)

Citations (5)

Family Cites Families (7)

• 1982
  • 1982-01-12 FR FR8200358A patent/FR2519573A1/fr active Granted
• 1983
  • 1983-01-11 WO PCT/FR1983/000007 patent/WO1983002417A1/en unknown
  • 1983-01-11 EP EP83400058A patent/EP0084483A3/fr not_active Withdrawn
  • 1983-01-11 EP EP86102701A patent/EP0191506B1/fr not_active Expired
  • 1983-01-11 AT AT86102701T patent/ATE45530T1/de not_active IP Right Cessation

Patent Citations (5)

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