FR2477455A1 - ROTARY TOOL MACHINE FOR REPRODUCTION OR FINISHING WORK - Google Patents

Abstract

THE SUBJECT OF THE PRESENT INVENTION IS A MACHINE WITH A ROTARY TOOL, FOR EXAMPLE ABRASIVE FOR THE FINISHING WORK BY REPRODUCTION OR REPRODUCTION. THE MACHINE ACCORDING TO THE INVENTION INCLUDES A FRAME 1 ON WHICH A TABLE 2 IS POSTED WITH AT LEAST A WORKTOP 3 IN THE ZONE IN WHICH IS LOCATED OR PARTLY LOCATED A ROTARY TOOL, FOR EXAMPLE ABRASIVE 4. THE MACHINE IS ESSENTIALLY CHARACTERIZED BY WHAT COAXIALLY WITH THE TOOL SHAFT IS MOUNTED A 6 EXTENSIBLE MACHINING GUIDE WITH AT LEAST ONE REVOLUTION SURFACE COAXIAL WITH THE SHAFT AND FREE TO ROTATE IN RELATION TO IT, WHICH COOPERATES WITH A GUIDE 7 CARRYING THE WORKPIECE 8. THE MACHINE ACCORDING TO THE INVENTION IS MORE PARTICULARLY SUITABLE FOR THE REPRODUCTION OR FINISHING OF COMPLEX PROFILES ON A PART WITHOUT HAVING THE IMPOSED ATTACK ANGLE.

Description

1 2477453

  The present invention relates to a rotary tool machine for reproducing on a workpiece the patterns of a template or motherboard or to reproduce a piece from a jig or

mother piece.

  In the case of machining by reproduction of a previously roughed part, it is known to use machines provided with a fastener of the workpiece, and at least one rotary tool such as an abrasive belt that can be moved according to the outline of a template. The disadvantage of this type of machine is that one must first of all machining parts set a very precise position

  of the part in relation to the template and / or in relation to the tools.

  For this we generally use a highly qualified staff

qualified so expensive.

  In addition, because of the mobility of the tool according to the profile of the template, this type of machine is generally provided with at least one

  tool carriage mounted on slides secured to the frame.

  This carriage has a roller or other member that cooperates with

template.

  In order to achieve precise machining of the part, the production of the slides and the guides of the carriages must be carried out in a very precise manner and these different members are generally provided with special arrangements limiting their wear, which makes

  the manufacture of such a machine, long and expensive.

  In general, this type of machine is more particularly

  intended for the machining of large series of parts and its

  because of its cost is not feasible for small or

average series.

  The object of the present invention is to eliminate these drawbacks

  thanks to the use of a machine that is simple to produce and inexpensive, particularly intended for machining small series of parts in a precise manner without any adjustment of the position of

  the workpiece to the tool and without any special adjustment

  bind the position of the part relative to the template.

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  Another object of the invention is the use of a machine which does not require skilled personnel for the machining of parts, which tends to reduce the cost of the finished product despite the small number of parts to be used. to machine in the event of use of the machine according to the invention for small series.

  For this purpose, the machine according to the invention is essentially characterized

  in that the rotary tool is provided with a circular guide coaxial with said tool and which cooperates with the profile of a jig

  on which is fixed the workpiece.

  According to another characteristic of the invention, the guide is

  staggered by a removable outer race bearing, the said roll-

  may receive rings of different diameters to

vary the depth of pass.

  Other features and advantages of the invention will become apparent

  when reading the description of a preferred form

  embodiment with reference to the accompanying drawings in which

  - Figure 1 is a top view of such a machine.

  FIG. 2 is a view of the machine in section AA according to FIG.

figure 1.

  - Figures 3.4.5. are sectional views of examples of reali-

machining guide.

  - Figure 6 is a perspective view of a machining jig.

  FIGS. 7 and 8 are views of the system for tensioning the abrasive belt and for adjusting the parallelism of the rollers

rotatable.

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  The rotary tool machine according to the invention can be a

  China used for the reproduction of parts from a gabab

  laughs or mother piece or sander-type machine, used to

  the finishing of pieces from a template or mother piece.

  As represented by the machine according to the invention for example of the double-band sander type comprises a frame 1 on which

  is placed a table 2 provided with at least one plan4de-work 3.

  In the area of the worktop the machine is provided with

  minus one abrasive rotary tool 4 ,. mounted in a protective casing

  5 and provided with at least one cooperating guide 6 (FIG.

  with a jig 7 on which is fixed the workpiece 8 pre-

  lathing outlined, the said template-and the said piece being manipulated

  set by the user of the machine.

  The frame 1 is constituted by four vertical feet 9, likewise

  length spacers at their upper end-by two lanyards-

  10 horizontal and parallel bars and at least one cross-bar

  11 horizontal and perpendicular to the said longitudinal spars at the end

which is fixed.

  The longitudinal members 10 are provided with a plurality of cylindrical orifices with a vertical axis for passing fastening means from the table 2 to the

building 1.

  Preferably the machine is provided with at least three shims 12

  interposed between the longitudinal members and the table to adjust the posi-

  of the latter in relation to the frame and / or to adjust the ortho-

  gonality of its work plan relative to the axis of the rotary tool. The table 2 of metal or other is in the form of a

  preferably flat horizontal wall of poly-outer outline

  gonal or curvilinear provided with at least one curvilinear contour,

  circular or polygonal defining the work plan 3 ..

  The outline of the work plan is such that, whatever the posi-

  the user of the machine with respect to the said contour,

  it can without any difficulty to access the rotary tool.

  The shape of the outline of the worktop is such that it allows

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  1 also to have the entire template on the worktop and this despite the position of said template relative to

  the rotary tool when it is machining the part.

  According to a preferred embodiment named represented in FIG. 1, the table is in the form of a rectangle with a longitudinal axis parallel to the longerens extended beyond

  of one of its small sides by the work plan 3.

  This work plan substantially follows the shape of a triangle whose large base is perpendicular to the longitudinal axis of the rectangular shape and overhangs the said shape on either side of its longitudinal sides 13, the said base being more

wide than the table.

  The worktop has two small sides 14 connecting the sides 15 of the triangular shape of the worktop 3 to

  longitudinal sides 13 of the rectangular shape of the table 2.

  The sides 15 are preferably perpendicular to each other

  or form between them an angle greater than one right and are

  laid symmetrically with respect to the longitudinal axis

  of the rectangular shape of the table.

  Advantageously, the sides 15 are connected to one another by a round for reasons of obviousness to those skilled in the art. In addition to reducing the wheelbase of the machine the sides 14 of the worktop are perpendicular to the sides 15 to which

  they join or form with them an obtuse angle.

  The worktop as described is particularly adapted to receive two rotary tools located respectively from

  and other of the longitudinal axis of the table 2.

  Preferably both rotary abrasive tools are coarse

  different grain size to achieve-first a half

  finishing by working with the tool whose grain size

  is the most important and a finishing in working with the

be tool.

  For this purpose, the user of the machine will engage the

  lablement sketched and its template on the work plan by

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  1 one of the short sides 14, and while applying against the abrasive tool will print a movement in advance (shown in Figure 1 by the arrow A) directed from this cilt 14 to the area of the work plan located below the longitudinal axis of the table

2.

  After completion of the semi-finishing as shown in Figure 1 the user engaging the piece and its template by

  the small side 14 symmetrical to the previous one with respect to the long axis

  of the table proceeds to finish with the second ou-

rotating machine.

  According to a preferred embodiment, the abrasive tools

  4 each consist of an abrasive belt without end

  located in the worktop mounted on pebbles 16

  and 17 axes perpendicular to said plane.

  The abrasive belts are advantageously housed in a protective casing connected to a machining waste suction nozzle 18.

  This casing is provided with at least two lids mounted on

  to allow the change of the abrasive belt and / or

rollers 16 and 17.

  These rollers are releasably wedged by any known means on vertical rotary shafts and each engage in an orifice formed in the table 2 and rotate in bearings

located under the said table.

  The shaft 19 corresponding to the roller 16 is mounted in at least two

  bearings 20 fixed by any known means to one of the vertical faces

  shims of the cross member II of the chassis 1.

  The shaft 21 corresponding to the roller 17 is mounted in at least two bearings 22 fixed on a tensioning means of the strip

  and adjusting the parallelism of the two rollers 16 and 17.

  The shaft 19 beyond its lower bearing 20 is provided with a pulley 23 provided with at least one groove receiving a transmission belt 24 cooperating with a pulley 25 wedged on the shaft

  output of a motor member 26 integral with the frame 1.

  The belt 24 is tensioned by a tensioner 27 known in

  either, shown schematically in FIG.

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  This tensioner is fixed by any known means to the frame 1 of the machine.

  born. The pulley 25 is provided with at least two grooves, each receiving a belt 24 to rotate the two rollers 16 of the machine and the two abrasive belts 4. Advantageously, the motor member 26 such as an electric motor is equipped with an element selecting its direction of rotation and is associated with a means for varying the speed of rotation of the

abrasive belt 4.

  The shaft 19 is provided with a collar 27 disposed under the roller 16 and at the orifice formed in the table in which the

said tree 19.

  The upper face of the collar 27 is located above the work surface 3 and the diameter of said collar is smaller than the diameter

  the orifice of the table into which the shaft 19 engages.

  Against the upper face of the collar 27 and under the low end

  of the roller 16 is mounted the machining guide 6.

  Against this guide during machining, the reference face

7A of template 7.

  In the exemplary embodiment shown in FIG. 1, the profile of the face TA is curvilinear and has a succession of recesses and bumps which must be reproduced on the part 8

by the template.

  When the user prints the workpiece and its template

  in advance guide 6 follows the profile of the reference face.

  7A so that the room is also animated by a movement

  in advance of the abrasive tool for repro-

  draw on one of the faces of the said part the profile of the face 7A.

  The generator of the rotary tool that penetrates the most into the

  this 8 is always located in a plane that passes through the rotational axis

  the tool and the guide and the point of contact of the

  guide with the reference face 7A of the template.

  This condition must be fulfilled regardless of the position of the part 8 during machining and its jig with respect to the axis

longitudinal of the machine.

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  1 0 This feature allows to reproduce on the piece of the profiles

  relatively complex without having an imposed angle of attack.

  For this purpose, the guide 6 is of circular or cylindrical shape,

  provided with at least one outer surface of revolution, for example

  circular or cylindrical pole coaxial with the shaft 19 and free in rotation relative thereto against which abuts the

reference face of the template.

  The guide 6 is free to rotate relative to the shaft 19 on which it is mounted so that when said shaft and the tool are driven in a rotational movement said guide can do

  frictional rotation against the template 7.

  Preferably the guide 6 is constituted by a rolling member having an inner ring 28 coaxial with the shaft 19 on which it locks, and an outer ring 29 free to rotate

with respect to said shaft 19.

  The inner ring 28 is mounted in force on the shaft 19 and repositions

  is on the upper face of the collar 27.

  Between said ring and the lower end of the roller 16 is

  se a locking member in translation of the guide 6 relative to

the tree 19.

  This member also makes it possible to keep the lower end of the roller 16 of the outer ring of the guide at a distance so that the abrasive belt driven by this roller can not rub against

said ring 29.

  The outer radius of the ring 29 is equal to or different from the overall radius of the rotary tool or equal to or different from the radius of the

  roller 16 plus once the thickness of the abrasive belt.

  The difference between the value of the outer radius of the ring 29

  and the radius of the rotary tool determines the value of the penetration

  tion of said tool in part 8.

  To adjust the depth of pass the ring 29 of the rolling member constituting the guide 6 is preferably removable in

  so that the user according to the needs of the work of

  can replace it with a larger diameter ring or

smaller.

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  1 For this purpose the roller 16 is wedged on the shaft 19 demon-

table.

  This arrangement also makes it possible to replace the roller 16 with another roller of larger or smaller diameter, better adapted to the profile to be produced on the part S. As represented in FIG. 6, the jig 7 cooperating with the guide

  6 is provided with abutments 7B for positioning the workpiece 8.

  This part is fixed to the template by two lateral flanges 7C

known in itself.

  This template is provided with a recess 7D coming under the lower end of the rotary tool so that the face 7A is released from said end when it bears against the

guide 6.

  Advantageously, the template is provided with gripping means such as

  only handles fixed by any known means.

  According to another embodiment the machining guide is constituted by a rolling member such as a ball bearing, coaxial and fixed to the shaft of the tool and by a cooperating ring

  with the jig wedged in relation to the outer ring of the wheel

  by a positioning member integral with the outer ring. As shown in FIG. 4, the guide 6 comprises a bearing

  6B balls mounted in known manner on the shaft 19, an internal organ

  intermediate or a ring 30 secured to the outer ring of the bearing and a removable ring 31 fitted and positioned on

the organ 30.

  This ring 31 is intended to cooperate with the face TA of the template 7. The ring 30 is provided with a series of radial orifices receiving

  respectively locking devices of the ring 31.

  These members are constituted as known by an elastic member such as a spring acting on a ball which is engaged when the ring 31 is placed in a ring groove 32 arranged

  in the thickness of said ring 31 and open towards its axis.

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  According to another embodiment as shown in the figure, the machining guide 6 has a series of steps or: shoulder 6A of different diameters intended to cooperate with the face 7A of the template, so that the user of the machine can choose the depth of the tool without having to disassemble

the said guide 6.

  For this purpose, this machining guide is rotatably mounted and fixed in trans-

  on a bushing 33 coaxial with the shaft 19 on which it

is mounted.

  Preferably, rolling members 34 are arranged between the

  socket and the guide, in a manner known to those skilled in the art.

  The bushing 33 is provided with a longitudinal longitudinal oblong hole

at the axis of the shaft 19.

  In this opening is engaged rotational stop means constituted

  preferably by a screw 36 engaged in a threaded hole

in the tree 19.

  To have one of the shoulders 6A of the roller 6 facing the

  7A of the template 7 and to lock in this position the sleeve 33 cooperates with a fork lever 33A hinged to the frame 1 and is provided with a translation stop means with respect to

the tree 19.

  As known this means is constituted by a ball engaged in a radial orifice of the sleeve and pushed towards the rotary shaft by

an elastic member.

  Depending on the shoulder chosen to cooperate with the reference face 7A of the template, the ball will engage in a groove

  ring formed in the rotary shaft, said rotary shaft

  feeling as illustrated several superimposed grooves.

  According to an alternative embodiment, the stepped shape of the guide 6 is achieved by stacking the rings of different outside diameters.

  In order to adjust the parallelism of the axes of the rollers 16 and 17

  With the same abrasive belt 4 the bearings 22 in which the shaft 21 of the roller 17 is swirled are mounted on a vertical wall 37 articulated around a horizontal shaft 36 and

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  1 transverse to the general direction of band 4.

  The shaft 38 is secured to a support member 39 of the device

tension of the band.

  This member 39 is provided with an adjustable stop 40 opposing the angular movement of the vertical wall 37 around the axis 38 in order to maintain the parallelism of the shaft 22 with respect to

the tree 19.

  The member 39 is integral with a vertical shaft 41 hinged to the frame.

  1. This shaft is provided with an arm 42 cooperating with an organ of

tensioning the band.

  Advantageously, this ergane is constituted by a lever 43 endowed with

a counter weight 44 removable.

  This lever is articulated to the frame and its point of articulation is provided with a rod 45 perpendicular to the arm 42 on which it rests so that the shaft 17 is susceptible to a movement of

  rotation around the shaft 41 able to stretch the band.

  The machine as described is more particularly intended for machining on wooden parts or any other materials,

  complex profiles without the use of qualified staff.

  It goes without saying that the present invention is not limited to the embodiments described but on the contrary the machine according to the invention can receive any arrangements or variants, while

  remaining within the scope of this patent.

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Claims (1)

1 RI / Rotary tool machine for reproduction or finishing work comprising a frame on which is mounted a work table provided with at least one work plane in the area of which is located or partially located at least one driven tool in rotation by a motor member for reproducing - on a workpiece patterns of the reference face of a jig cooperating with a machining guide characterized in.cece said circular guide is coaxial with the tool or one of its axes, and is mounted on the drive shaft of said tool so that it is fixed in translation and rotatable relative to said shaft. R2 / rotary tool machine according to claim 1 characterized in that the machining guide is mounted on the shaft between the work plane and the lower end of the rotary tool and is provided with at least one surface of external revolution for example cylindrical or circular and coaxial with the shaft of the tool and free to rotate relative thereto, against which abuts the reference face of the template which allows the use of complex profile without having an imposed angle of attack. R3 / Rotary tool machine according to claim 2, characterized in that the guide is constituted by a bearing of the type comprising an inner ring and an outer ring rotatable relative to the inner ring and removable for a replacement hearth by a ring of different outer diameter, said inner ring being fixed on the shaft of the rotary tool and said outer ring preferably having an outer diameter equal or close to the overall diameter of the rotary tool, the difference between the outer radius of the outer ring and the radius of the rotational tool conditioning the depth of pass of said tool. 12 2477455 1 R4 / Rotary tool machine according to claims 1 and 2, characterized in that the machining guide is constituted by a rolling member such as a coaxial ball bearing and fixed to the shaft of the tool and by a ring cooperating with the jig wedged relative to the outer rolling ring by a positioning member integral with said outer ring. R5 / rotary tool machine according to claims 1 and 2, characterized in that the machining guide has a series of steps or shoulders of different diameters co-operating separately with the reference face of the template and that said guide cooperates with a hub ensuring its mobility in translation with respect to the shaft of the tool and ensuring its immobilization in translation relative to said shaft to position the selected step opposite the reference face of the template. R6 / rotary tool machine according to claims 1 and 5, characterized in that the means comprises a sleeve on which the guide is rotatably mounted, fitted on the shaft of the tool, so that it is free in translation and fixed in rotation with respect to said shaft and cooperating with devices for controlling its translation.with respect to said shaft and with means ensuring the positioning of said sleeve relative to the said tree. R7 / Rotary machine according to claims 1.2.5 and 6, characterized in that the stepped form of the machining guide is made by stacking rings of different diameters and diameters. RB / rotary tool machine according to claim 1 characterized in.ce that said template is provided with a recess for disengaging its reference face from the bottom end of the rotary tool. 13 2477455   1 R9 / Rotary tool machine according to claim 1, characterized   in that the contour of circular polygonal shape, or cur-   the worktop of the table has at least one   side, connecting to the profile of the table and perpendicular   or transverse to the advance movement of the template and   the piece with respect to the rotary tool.   R10 / Rotary tool machine according to the claims and 9 characters   characterized in that the outline of the worktop is triangular in shape and is connected to the profile of the table by two sides transverse to the direction of advance of the template and   the room which allows whatever the position of the user   sator with respect to the said outline that it can without   no one can access both tools.