FR2464109A1 - APPARATUS FOR BENDING TUBES IN THE FORM OF HAT OF GENDARME OR IN ESSE - Google Patents

Abstract

1. Apparatus for bending the tubes (T), in the form of a gendarme hat or of an ess, of the type comprising a mobile stamping form (4) between two counter-forms (8) maintained on a framework (1) with counter-abutment rollers (13) of the free portions of the tube (T) to be bent, mounted on a support which is sliding relative to said framework (1) with axial handling means, the lateral counter-forms (8) mounted on the same framework (1) receiving the push rod of the form (4) and the control means for the shifting thereof, and co-operating tangentially along the supporting points of the tube (T), prior to the bending thereof, with counter-abutment rollers (13), characterized in that these counter-abutment rollers (13) are mounted on a support (9) to provide a clamping of the tube (T) and that the form (4) is made mobile independently of the counter-abutment rollers (13) in order to provide during the bending process by partial of the portions of the tube (T) on the counter-forms (8) a guiding, sliding and rolling effect for the whole time of the operation, so as to make possible without any distortion the machining of thin tubes and the production of branch pipes which are substantially parallel.

Description

The invention relates to a device for bending the tubes in

hat shape

of gendarme or esse.

  The present invention relates to shaping and more particularly to

  mechanical work of tubes mainly for their bending in order to

  hangers in the shape of a gendarme hat or in esse.

  These hats in the shape of a cocked hat or an ax in a tube

  make it possible to obtain a crossover with another perpendicular tube arranged in the same plane, or to avoid an obstacle in the case of an esse forming two

successive elbows in opposite directions.

  In apparatus for bending known tubes of this kind, a form of

  exchangeable traction acts perpendicularly in thrust on the tube held on the opposite side and symmetrically by lateral counter-forms, movable spacers movable or fixed, widely arranged outside of said counter-forms

  only serve as support or external stop on each side to the

  Free tiline of the tube during the forming operation.

  With this device the bending of thick tubes is carried out in good

  tions, but in contrast to the bending of thin tubes is defective by

  the non-maintenance of the said tube to the right of counter-forms, which leads to

  tears and crushes. On the other hand, after forming the hat of n-

  In the arms or the esce, the rectilinear branches are no longer parallel.

  The apparatus for bending the tubes, which is the subject of the invention, overcomes these drawbacks.

  vantages. In this one, indeed, the lateral counter-forms cooperate

  approximately following the support points of the rectilinear tube before bending with counter-support rollers and clamping said tube to thus provide in combination with said counterforms its deformation with a sliding effect of rolling and guiding during the entire operation of forming the gendarme hat or the esse, said rollers being held in abutment by a support sliding laterally on an independent frame receiving the triangulation formed by the push rod with end form or hanger and symmetiquement bending counterforms; manual adjustment means by

  screw ensuring by the sliding of the support the approximation or the distance

  Simultaneous feel of pebbles in relation to counterforms

view of the tightening of said tube.

  According to another characteristic of the invention, a graduated adjustable stop screwed freely onto the thrust rod is freely centered by its outer bearing surface in the corresponding bore of the squared end of the frame and forms at the end a flange which cooperates with support against the said end squared at the end of the race or maximum offset hanger cocked hat;

  said stop allowing by its external graduation the setting of the

  founder of said offset from the initial position of tangential support of the

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  shape on the rectilinear tube in the clamping position between the counterforms and

the pebbles.

  According to another characteristic, the counter-bearing rollers are

  in the form of parallelepipedic blocks with facings

  dinales, to lodge on the squared sections of the sliding support, while taking support when clamping on the vertical faces inclined or not, in the form of V e, with respect to each other; each roller being further pierced

  asymmetrically in thickness following two perpendicular holes to allow

  be free on a positioning rod secured to the support,

  regardless of its centering and support.

  According to another characteristic ..., the counterforms are mounted freely rotating on removable and adjustable axes respectively fixing in holes judiciously positioned in the frame for variable positioning given the equal diameter or not of said counter-forms corresponding to the outer and opposite rays of the police hat to be obtained and their disymmetrical post-season for obtaining hats of policeman with unequal branches. According to another feature, a graduated light or not, formed in the thickness of the btti allows the fixation of the axis of at least one against-form

  view of its transversal departure from the other counter-form to obtain

esse-shaped hangers.

  According to another feature, the end of the roller support axially forms a threaded boss cooperating with a screw provided at the end of an operating wheel and whose other end is made integral in translation with a second boss at the end of the frame. and in the same axis as that of the push rod; said screw or possibly a maneuvering rod controlled by jack allowing the sliding movement of the support and consequently the rollers

  compared to the b4ti on which the flat bending counterforms are mounted.

opposite the so-called pebbles.

  These and other characteristics will emerge from the rest of the

description.

  To fix the object of the invention, without however limiting it, in the

  1 is a small scale perspective view illustrating the separate elements of the apparatus for bending the tubes according to the invention arranged in order

mounting.

  FIG. 2 is an external plan view illustrating the apparatus at the end of

  bending of a tube shaped like a cocked hat with branches

the.

  FIG. 3 is a front view in section along line 3-3 of FIG.

3 2 4 2464109

re 2.

  FIG. 4 is a front view in section along the line 4 of FIG.

re 2.

  FIG. 5 is a partial perspective view of the frame, illustrating the

  the position of oblong and squared open-mouthed openings in the shape of a tee,

  adjustable mounting of at least one counterform.

  FIG. 6 is a plan view, schematically illustrating the formation

  a simple bending with the apparatus according to the invention.

  FIGS. 7 and 8 are plan views schematically illustrating the

  forming an esse-shaped bending with the apparatus according to the invention.

  FIGS. 9, 10 and 11 are plan views, schematically illustrating the forinatior of a bend in the shape of a cocked hat with equal branches

with the apparatus according to the invention.

  FIG. 12 is a plan view similar to FIG. 11 illustrating shema

  the formation of a bend in the shape of a policeman's hat

  unequal with the apparatus according to the invention.

  The apparatus for bending the tubes, in the form of a cocked hat or an esse, object of the invention essentially comprises a frame 1 in the form of a plate with a rear end of a squared and reinforced 1 axially pierced in 1 for the free sliding engagement of the graduated cylindrical portion 21 of an adjustable stop _, terminating on the outside by a support flange U. Jne thrust rod 3 threaded is axially screwed into the interior of the abutment 2 and is present at the end above the frame 1 with one end forming a flat surface 31 provided with a groove 3 to allow the engagement of 1 '

  axial opening 41 of a form 4 interchangeable or hanger substantially dmi-

  circularly held in longitudinal position, by a pin 5 being housed in the groove 32. Each form 4 with peripherally a semi-circular groove 4 corresponding to the outside diameter of the tube T to be bent is also established

with a radius R which is normalized.

  On the opposite side, the push rod 3 forms a thrust head 33, a machine

  which allows to exert the pressure, or possibly of lever key to

manual command.

  Bgti 1 also forms a T-shaped profile at the front, the branches of which are pierced in the form of holes 13, 14, 15 arranged symmetrically relative to each other.

  to the axis of the shank 3, but staggered both longitudinally and trans-

  * Erda] emient. A longitudinal leg 1 graduated or not being also pre-

  View of one of the branches of the frame 1 parallel to the push rod.

  The holes 13, 14, 15 allow symmetrically in pairs the fixing by screwing or otherwise of a locking screw 6 intended to maintain in position

  an axis 7 whose cylindrical outer surface allows free rotation centering.

4 2 4 2464109

  circular or circumferential counterstream

  semicircular grooves S corresponding to the outer diameter of the tube T at

  trate. Each interchangeable co-e-2o-e 8 re variable diameter according to the va-

  the radius of the hanger to be obtained can also be mounted by its vsie 6 symmetrically and asymmetrically on the holes 13, 14 or 15 of the branches of the b8ti 1 given its outer diameter and its positioning more or oins relative compared to the axis of Form 4, for the sole purpose of obtaining

  Constable hats - with variable spacing, and equal or unequal branches.

  The frame 1 forms, by means of its parallel lateral faces 17, a guiding slide of the corresponding U-section of a sliding support 9 in the form of

  of plates applying below said frame. The latter is symmetrical

  querient to the right of the faces 1 and each c8'é a square squared at right angles with horizontal side 9 disposed substantially in the same plane as the upper face of b9ti 1 and vertical side _ forming at its base and internally

  a notch 9 constituting the U guide upper section.

  At the front, the support 9 is established with an axial and profiled branch 9 which protrudes from the front face of the frame 1 and at the end constitutes a squared boss in which is screwed axially an operating screw 10 provided externally with a steering wheel. 11. On the opposite side, the screw 10 constitutes a

  shouldered 101 provided with a circular groove 10 so as to engage in the cu-

  corresponding vertice 18 of an axial boss 1 formed at the end of the b8ti 1. A pin 12 engaging in the groove 10 ensures the coupling in translation

screw 10 and b4ti 1.

  It is also emphasized that without departing from the scope of the invention, it is provided

  remnlacerate the screw 10 by a sliding actuating rod, acting in trans-

  tion for the displacement of b8ti 1, and controlled by cylinder or mechanical means

such as cam, lever wrench ...

  It must be considered that each squared section of the sliding support 9

  torise the seat of a roller 13 in the form of a parallelepiped block section

  Rectangular as square sleeps each face has a longitudinal hollow.

  dinale 131 substantially semicircular calibrated according to the outer diameters: pierced usual tubes used. Each roller 13 is further / dissymmetrically and in thickness at 132 in two perpendicular directions to allow with play and following two positions its engagement on a positioning rod 14

  vertically fixed on the horizontal side 91 of the squared section.

  As a result, each roller 13 is tangentially and perpendicularly

  with regard to the corresponding counter-form 8 whatever its posi-

  with the possibility of separation or approximation by acting

  on the steering wheel 11 which controls the axial displacement of the support-

sliding 9 relative to the bed 1.

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  It is therefore conceivable that the tube T engaged in grooves 8 of the two counterparts

  8 forms is thus gripped and strictly maintained in position due to the approximation and the support of the rollers 13 which apply rigorously when clamping on the vertical faces, being able to be inclined between them, squared sections, thereby forming contrappui of the tube T so as to allow the rigorous positioning of the two grooves 81 and 13 1. For this purpose the roller 13 may possibly have a slight height displacement during tightening. According to these provisions it is also noted that the push rod 3 and

  the operating screw 10 are aligned along the same axis to ensure

  perfect balance during the bending operation and even

  tube T at the right of the rollers 13 with respect to the counterforms 8.

  It is noted that this apparatus thus produced can be used to obtain

  tlon of a simple bend or bend of a tube as shown in Figure 6 of the drawings.

  In this case, the sliding support 9 is removed and only the frame 1 equipped with the push rod 3 provided with the form 4 and corresponding counter-forms

8 is used.

  The tube T is placed on the two counterforms 8 placed symmetrically or

  no and the form 4 exerts in the known manner an axial or asymmetrical support

  arrow F for obtaining a T1 bend with adjacent V-shaped branches. In the case of using the device to make an ebony or bend in a bayonet, a T tube with an offset of the two branches parallel to a side X, the counter-form 8 disposed on the side of the longitudinal lumen 1 of the b9ti is fixed by its locking screw 6 and its axis 7 in said light 16 in a spacing relative to the other counter- form, corresponding to the side X, the displacement and adjustment taking place either by the graduations or

still by measure.

  Note that, as illustrated in FIG. 5, the branch corresponding to

  Alternatively, FIG. 1 may alternatively form an aperture 101 in the form of T

  the movement of the locking screw 6 in two perpendicular directions

  relative to the other counterform.

  The tube T is placed in abutment on the recesses 131 of the rollers 13 and then clamped opposite the non-offset counterform 8, via the

  operating wheel 11 as shown in Figure 7.

  The form 4 is then brought directly into contact with the tube T by simply sliding the push rod 3 "while the adjustable stop 2 is adjusted longitudinally in position by screwing or unscrewing on the said

  push rod 3 so as to present the figure of its graduation 23 cor-

  corresponding to dimension X, with respect to the outer face of the squared portion

11 of the frame 1.

w

  It can be seen that the thrust force exerted on the rod 3 (arrow F1)

  that in contact with the collar of aapui 2 of the abutment 2 on the squared part 11 and following the pre-setting corresponding to the X side, allows, thus, as illustrated in Figure 8, the formation of an esse with two branches parallel spaced apart along the side X corresponding to the spacing of the against-forms

  8 and the distance race of form 4.

  It is also considered that the controlled displacement of Form 4 through

  intermediate adjustable stop 2 can be used also for bending

simple.

  According to Figures 9, 10 and 11 and 12, the apparatus allows the realization of a gendarme hat with equal or unequal branches from a tube T. In the case of obtaining a branched gendarme hat equal / ym%; I8! t E of the counterforms 8 is adjusted in view of their diameter and the opening

Constable hat to get.

  The rectilinear tube T is then put in place on the grooves 8 of the counter

  8 and then tightened by the steering wheel 11 which moves the support

  smoothing 9 in order to support the rollers 13.

  The shape 4 is as previously brought tangentially in contact on the said tube, T, while the adjustable stop 2 is moved relative to the rod

  3 to increase the positioning of the digit of its graduation corres-

  laying on the rote X of displacement of the form 4 up to the stop position

of the support flange 2.

  Once the operation is complete, it is then sufficient to loosen the rollers 13 by

  counter-shaped port 8 to disengage the bent tube.

  In the case of obtaining a gendarme hat with unequal arms as illustrated in FIG. 12, the counter-forms 8 of identical or different radii,

  are offset with respect to the axis of the form 4 so as to obtain two

  unequal effects D and D1. In this case, the rollers 13, or the roller 13 eorrespon-

  In the case of the outermost or the most distant form 8, they can be positioned differently on their rods 14 by turning 180 degrees, relative to their holes 132 so as to rigorously allow the support

  tangential and the tightening of the branches of the tube T, compared to the said counter

forms.

  The advantages are apparent from the description, and the emphasis is on

ticular:

  the arrangement of the rollers 13 which cooperate with the counterforms 8 of

  to clamp the tube T for braking, rolling and perfect guiding

  during its winding or bending on the so-called counter-forms and under the

  Uric pushing of the form 4; this feature authorizing a

7 2 4 2464109

  perfect way the bending of thin tubes with rigorously parallel branches - the unique push force of the form 4, compared to the sides-forms 8 constituting ae triangulation to ensure a perfect balance and equal sliding on both sides of the tube T and a same friction compared to the rollers 13

  - the single triangulated effort of clamping the rollers 13 on the tube T, rigorous-

  have equal to the right of each counter-form 8 - the arrangement of the adjustable stop 2 which makes it possible to execute a large number of successive and identical cfintrages or to revert a hanger of a given value that $ pue is the radius or the diameter of the tube - the arrangement of the adjustable stop 2 which makes it possible to produce hangers of varying depths for the same radius

  - the possibility of symmetrical or non-symmetrical variations of the position-

  the axes of the counterforms 8 according to the bending radius of the form 4 - the interchangeability of the counterforms 8, of the form 4 and the rollers 13 according to the outside diameter of the tube T and the bending radii to be obtained - the possibility of asymmetrical positioning of the counterforms 8 with respect to the thrust rod 3 and. the screw 10 to get gendarme hats to

unequal branches.

  It is also noted that the bearing faces of the rollers 13 slightly inclined to form an X compensate for the elastic return of the branches of the tube

  after bending for their rigorous positioning.

  The invention is in no way limited to that of its modes of application nor of those of the embodiments of its various parts having more

  have been specially indicated; on the contrary, it embraces all variants.

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Claims (1)

- CLAIMS - -1 Apparatus E bend the tubes in the form of cocked hat or esse type of a form of stamping movable between two counterforms held on a supoort, with retaining roller of the free parts of the tube to be bent, characterized by the fact that the lateral counter-forms mounted on the same b4ti receiving the te -e of thrust of the form and the means of control of its displacement, co-operates tangentially according to the bearing points of the tube avarn sor bending ac of the bars of against -anpuis and clamping mounted on - sliding support and adjustable relative to said frame with axial operating means to ensure during the bending work by winding partitl tub- parts against against-forms, an effect I guiding, sliding and rolling during the entire operation, so as to allow without deformation the _vail1 _ thin tubes and the realization of rigorously parallel branches; -2- Apparatus according to claim 1, characterized in that the frame receiving the shape with its thrust rod and against the forms forming a triangulation is formed by lateral sides means for guiding in translation of the lower support sliding whose rear transverse branch protruding from said frame constitutes squared and symmetrical supports disposed substantially in the plane of the upper face of the frame, to allow the housing of the rollers opposite the counterforms and held respectively in position by the inter4 diaire of a staggered finger traversing with Game a corresponding aperture and authorizing the placing of said roller according to two positions compbetenu the spacing of said against-forms -3- Apparatus according to claims 1 and 2 taken together, characterized by the fact that each counter-support roller is in the form of a parallelepiped block to lodge on the eq eects uerrées of the support and 3 take support when tightening on the vertical forms, inclined in the form of i relative to each other, or ercCó? not inclined. -4- Apparatus according to claims 1, 2 and 3 taken together, characterized in that the lower sliding support receiving the rollers, form at the end of its axial branch and overhanging a squared boss for screwing a maneuvering screw or the housing of a sliding rod in translation, coupled in translation with a second boss formed at the end of bfti; the said screw die maneuver or the rod being rigorously arranged in the same axis as the push rod thus constituting with respect to the rollers a triangulation ooposée to that formed by the counterforms and shape. -5- Apparatus according to claims 1, 2, 3 and 4 taken together, characterized in that the push rod of the drawing form is threaded externally for screwing the adjustable stop freely centered in the - Wiping the end 6querr6e the frame and forming a flange end that cooperates in support against the said end end of the race or maximum offset of the hanger, a graduation externally established the scope of the said butt allowing from the initial position d tangential support of the shape on the tube in the clamping position to obtain by the controlled positioning of the collar relative to the squared end of the frame, the depth adjustment of the stroke of the push rod and its butte in limit switch. Apparatus according to claims 1, 2, 3, 4 and 5 taken together, characterized in that the counterforms are freely rotatably mounted on releasable and adjustable axes in positioning respectively fixing in holes. symmetrical or not established in the thickness of the frame taking into account the variable diameter of said o-forms and their spacing symmetrical or not for obtaining gendarme hats with equal or unequal branches. -7- Apparatus according to claims 2, 3, 4, 5 and 6 taken together, characterized in that at least one of the counter-forms can be fixed in a graduated longitudinal bore of the frame, parallel to the push rod , in order to allow, with respect to the other counter-form, to obtain an eorresplondant spacing at the start of the two parallel branches in the case of producing an esse on a tube. Apparatus according to claims 1, 2, 3, 4 and 5 taken together, characterized in that alternatively the counterforms can be moved in T-shaped graduated slots in the thickness of the frame to allow their adjustment both offset and spacing, said counterforms may be spaced symmetrically or not relative to the push rod of the form for obtaining hats policeman unequal or equal branches. Apparatus according to claims 1, 2, 3, 4, 5, taken together and 6, 7 and 8 taken separately, characterized in that in the case of producing a bend, the sliding support is removed. and the bending operation is effected solely by the controlled displacement of the form by providing the counterforces.   40.10- Apparatus according to claims 1, 2, 3, 4, 5 taken together and 2464109   6, 7 and 8 taken separately, characterized in that in the case of   an esse formed of two parallel branches, connected by two hangers,   one of the counter-forms is deported in the longitudinal lumen following   map of the branches of the axis to Gotenir, while the tube is placed in support on the hollow of the other against-fo? e and maintained in the clamping position by the corresponding roller, the thrust force of the shape controlled by the abutment according to the spacing of the branches to obtain allowing the formation of the esse.   -11. Apparatus according to claims 1, 2, 3, 4, 5 taken together and   6, 7 and 8 taken separately, characterized in that in the case of   of a gendarme cannon with equal or unequal branches, the counter-   shapes of different diameters or diameters, arranged or unsymmetrical   compared. to the push rod allow through their recesses the any of the tube held in the clamping position by the corresponding rollers while the effort of ussée of the form, controlled by the stop, is exerted   on the said tight tube eq ensuring the formation of the cocked hat.