CA2181644A1 - Apparatus for machine cutting of tubes - Google Patents
Apparatus for machine cutting of tubesInfo
- Publication number
- CA2181644A1 CA2181644A1 CA002181644A CA2181644A CA2181644A1 CA 2181644 A1 CA2181644 A1 CA 2181644A1 CA 002181644 A CA002181644 A CA 002181644A CA 2181644 A CA2181644 A CA 2181644A CA 2181644 A1 CA2181644 A1 CA 2181644A1
- Authority
- CA
- Canada
- Prior art keywords
- tube
- cutting
- support
- pivot
- press
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
- B23K37/0533—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor external pipe alignment clamps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/0823—Devices involving rotation of the workpiece
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Laser Beam Processing (AREA)
- Sawing (AREA)
Abstract
Apparatus for machine cutting of tubes comprising:
- a base frame (1), - a rotationally driven support means attached thereto for rotationally supporting the tube (4) to be treated and comprising a gore-like support region (18) for the tube (4) to be treated, - a press-down means (19) for the tube to be treated in the form of a press lever (20) which can be pressed in the direction of the gore-like support region (18), - a tool-free cutting means (30) working in a contact-free manner, -- which is pivotably supported about a pivot axis (S2) at a pivot means (31) which pivot axis is concentric with one support shaft (5, 6) of the support means for the tube (4), -- the cutting head (32) of which is arranged at a desired working distance (a) from the gore-like support region (18) and has its cutting direction (A) radially arranged with respect to the pivot axis (S1), and -- the pivot means (31) of which is force coupled via a coupling mechanism (42) with the press lever (20) of the press-down means (19) such that the press lever (20) automatically adjusts the desired pivot position of the cutting means (30) which corresponds to the diameter of the tube (4) to be treated, - a linear drive (39) for a relative movement of the cutting means (30) with respect to the tube (4) in the longitudinal direction (L) of the tube, and - a control means (63) which is coupled with a rotational drive (11) of the rotationally driven support means and with the linear drive (39) for said relative movement for producing a superimposed rotational-linear movement of the tube (4) relative to the cutting means (30).
- a base frame (1), - a rotationally driven support means attached thereto for rotationally supporting the tube (4) to be treated and comprising a gore-like support region (18) for the tube (4) to be treated, - a press-down means (19) for the tube to be treated in the form of a press lever (20) which can be pressed in the direction of the gore-like support region (18), - a tool-free cutting means (30) working in a contact-free manner, -- which is pivotably supported about a pivot axis (S2) at a pivot means (31) which pivot axis is concentric with one support shaft (5, 6) of the support means for the tube (4), -- the cutting head (32) of which is arranged at a desired working distance (a) from the gore-like support region (18) and has its cutting direction (A) radially arranged with respect to the pivot axis (S1), and -- the pivot means (31) of which is force coupled via a coupling mechanism (42) with the press lever (20) of the press-down means (19) such that the press lever (20) automatically adjusts the desired pivot position of the cutting means (30) which corresponds to the diameter of the tube (4) to be treated, - a linear drive (39) for a relative movement of the cutting means (30) with respect to the tube (4) in the longitudinal direction (L) of the tube, and - a control means (63) which is coupled with a rotational drive (11) of the rotationally driven support means and with the linear drive (39) for said relative movement for producing a superimposed rotational-linear movement of the tube (4) relative to the cutting means (30).
Description
Apparatus for machine cutting of tubes The present invention relates to an apparatus for machine cutting of tubes, and in particular to the mechanical coping of tubes in order to form cuts in the tube walls etc. ~enerally, it should be possible to obtain cutting curves of general form in work pieces of tubular form.
From DE-C242 19 431 describes an appal~lus for coping or scalloping of tubes is known which appal aLus comprises a frame and a rotating support means connected to said frame for rotationally supporting the tube to be treated. Furthermore, this appal~lus has a tool-free cutting means working in a contact-free manner for treating the tube, in particular a laser cutting means, an autogenous torch-cutting means, a waterjet cutting means or a plasma cutting means, which is movably guided in two-dimensions relative to the tube within a plane Iying within the rotational axis of the tube via linear actuators on a compound rest guiding means on the frame. For machine cutting of the tube, the rotation of the tube and the movement of the cutting means superposed therewith are controlled by a control means which is connected to the rotational actuator of the support means and the linear actuators of the compound rest guiding means.
A disadvantage of the known tube cutting appal~lus is the fact that the compound rest guiding means for the cutting appal~lus has a complicated construction since it comprises linear actuators crossing each other. Furthermore, the control is rather complicated since the app~lus comprises two linear actuators.
Furthermore, that in the known cutting appal~ s it is necessary to bring the cutting means from its working position upwards into a stand-by position in order to remove the work piece from the support means and to introduce a new workpiece. After having introduced a new work piece it is necess~ry to move the cutting means again close to the work piece.
This procedure requires additional time for the exchange of work pieces leading to a reduction of the capacity of the m~çhining ap~ s. Furthermore, movement of the cutting means close to the work piece requires a detector in the form of a limit switch to prevent the cutting means from touching the tube. The limit switch itself has to be incorporated in the control meçh~ni~m which further increases the complexity of the control process.
In view of the above problems it is an object of the present invention to provide a simplified apparatus for machine cutting of tubes without red~lçing the versatility of the apparatus. In particular, the compound rest guiding means of the prior art should be omitted in order to dispense with one of the linear actuators. At the same time the cutting means should be such that the replacement of work pieces can be performed faster.
This object is solved by a cutting apparatus characterised by the features according to claim 1. According to such a cutting apparatus a conventional, rotatable support means for rotationally suppor~ing the tube to be treated is used. The support means comprises at least _ ~18164~
two pairs of disks which are spaced in the longitudinal direction of the tube, with ~i./ely two disks aligned in parallel to each other. Each pair of disks-forms by a lateral offset ofthe rotational axes of the disks a gore-like or s~andlel-like support region for the tube to be treated into which region it can simply be put. As result of the inventive features of the cutting apparatus the compound rest guiding means can be omitted completely since the cutting means working in a contact-free manner is pivotally supported at a pivot means, the pivot axis of which being is concentric ~,vith a rotational axis of one of the disks of the support means for the tube. The cutting head of the cutting means is arranged at its desired working distance with respect to the gore like support region, and has its cutting direction radially arranged with respect to the pivot axis. The pivot means is forced to couple via a coupling means with the press lever of a press down means, which press lever can be lowered towards the tube and is articulated about a pivot axis parallel to the tube axis at the basic frame. Furthermore, the press lever can be pressed in the direction of the gore like support region, such that it presses from above on a tube Iying in the rotationally driven support means and ,.~ it in position. By this plessing the press lever scans practically the ~ mtq,ter of the tube to be treated. As a result of the forced coupling via the coupling mech~ni~m between the pivot means for the cutting means and the press lever the cutting means automatically adjusts itselfto the desired position collt;~l,onding to the diameter of the tube to be treated. In this position the cutting head is perpendicular to the tangent at the wall of the tube at the desired working distance. The subsequent cutting of the tube with a cutting guidance which can be chosen virtually a~bill~ily within certain limits is then performed by a superimposed movement of the rotational and linear movements of the tube and of the cutting means relative to each other, which movement is controlled by a control means via a s~lp~rimposed driving of the actuator of the rotationally actuated tube support means and of the linear drive for the relative displacement of the cutting means and of the tube to be treated in the longitll~in~l direction of the tube.
The above ~ ~pl ~ c make clear that in contrast to the prior art only one linear drive and one rotational drive have to be driven, which results in reduced effort for the control technique and the construction.
Since the cutting means is furthermore arranged in the neighbourhood of one of the rotational axes ofthe pairs of disks ofthe rotationally driven support means - i.e. below the tube - it is not necessary to remove the cutting means upward for the replacement of a work piece as is the case in the prior art. When a workpiece with a di~erenl diameter is introduced, only the desired pivot position of the cutting means has to be adjusted, which occurs automatically via the coupling means.
Further features, details, advantages and pl ere~ I ed embodiments of the present invention can be de~ d from the claims and the following description in which one embodiment of the invention is explained in more detail in conjunction with the drawings wherein:
Fig. 1 is a s.~h~n ~tic view of the cutting means according to the present invention along the longitll~in~l direction of the tube.
Fig. 2 is a side view of the cutting means of Fig. 1 along the direction of arrow II.
Fig. 3 is a block diagram of the control means of the cutting means according to the present invention.
2 1 8 1 6~4 The apparatus for m~hine cutting of tubes, which is shown in Figs. I and 2 in its entirety, however without the control means (see Fig. 3), comprises a base frame l with a base plate 2. On this plate are ~tt~.hed three support cheeks 3 ~ n~l;ng upwuds, the main planes of which are, respectively, vertical and perpendicular to the longit~ltlin~l direction L of the tube 4 to be treated. At these three support cheeks 3, two support shafts 5, 6 are rotationally supported. The support shafts extend parallel to the longitudinal direction L of the tube at the same height and adjacent to each other. A first gear 7 is rigidly attached to the left support shaft 5 as seen in Fig. 2 and is connected via a toothed belt 8 with a gear 9 on the driving shaft 10 of a step motor 11 which is ~tt~.hed on the base plate 2.
D;s,~laced in the axial direction with respect to the first gear 7, a second gear 12 is attached to the support shaft 5. In an axial position which is in ~lignm~nt thelewilll a furth`er gear 13 is rigidly attached to the second support shaft 6. The gears 12, 13 are connected ,vith each other by a further toothed belt 14 such that the two support shafts 5, 6 are synchronously rotated in the same direction when the step motor 11 is driven. Instead of the toothed belts 8, 14 chains can be used.
On each of the support shafts 5, 6 there are furthermore rigidly attached three support disks 15, 16, 17 and 15', 16', 17', each one of the support disks 15, 16, 17 on the one support shaft S showing a small axial displacement with respect to the corresponding support disk 15', 16', 17' on the other support shaft such that the corresponding support disks 15, 15', 16, 16' and 17, 17' on the two support shafts form pairs of disks, respectively.
In view of the lateral distance of the two support shafts 5, 6, the diameter of the support disks 15, 16, 17, 15', 16', 17' is such that the two corresponding support disks 15, 15', 16, 16' and 17, 17' overlap, respectively, as seen in the axial direction of the support shafts such that they form a gore-like support region 18 for the tube 4 to be treated. By introducing the - 2181fi44 tube 4 into this gore-like support region 18 the radial position of the tube is exactly defined. By a rotation of the support disks 15, 15', 16, 16' and 17, 17', the tube 4 is rotated about its longitll-lin~l axis.
In order to fix the radial position of the tube within the support region 18 during the cutting process, which will be explained latter, a press down means 19 is provided for the tube 4. This press down means 19 comprises a frame like press lever 20 which can be lowered from above onto the tube 4 and by which the tube 4 can be pressed down, through a press pulley 21, in the direction of the gore like support region 8. The pulley freely rotates about an axis 20' at the free end of the press lever 20. As is app~ elll from Fig. 1, which shows a side elevational view, the press lever is formed as a bent lever`whose first arm 22 forms the actual press down means for the tube 4 and is articulated about a pivotal axis S1 on a stud 23 on the base plate 2 of the base frame I Iying parallel to the longihl-lin~l direction L of the tube. A pneumatically ~ch~ted ram drive 25 with a piston rod 26 is engaged with the ess~nti~lly downwards extt?nr~ing arm 24 of the press lever via an articulation 27.
The cylinder 28 of the ram 25 is pivotally driveri about a pivotal axis S2 parallel with the longit~lflin~l tube direction L at its end 28' remote from the piston rod on a so called splined sha~ 29 whereas the cylinder 28 is fixedly connected with the splined shaft 29. The object of this particular type of support will be explained in the following in further detail There is furthermore provided a tool-free plasma cutting means 30 working in a contact-free manner for the m~.hine cutting of the tube 4. The plasma cutting means is pivotably supported at a pivot means denoted in its entirety with 31, about a pivot axis S3 which is arranged concelll,ically with the rotational axis of the rear support shaft 6. The cutting head 32 is then ~ ged at the desired working distance (Fig. 1) from the gore like support region 18. The cutting head 32 ofthe cutting means is furthelmol-e connected via a support plate 33 to a pivotably supported support disk 34 of the pivot means 31, which will be desc-ibed in detail below, such that the cutting direction A ofthe cutting head 32 is radially all~lged with respect to the pivot axis S3.
The support disk 34 is ~tt~çhed at a perpendicularly arranged arm 35 of a coupling me~h~nicm 36 which comprises a coupling rod 37 supporting said arm 35 and exten(lin~
parallel to the longitudinal direction L of the tube. Said coupling rod 37 is attached at a guide block 38 which is movable holi,o,llally and linearly parallel to the longit~ in~l direction L of the tube and whose movement is caused by a linear drive 39. The guide block 38 is therefore movably guided in a sliding guide (not shown in detail) in a pedestal 40 on the support plate 2 along this direction and is connected with a stepper motor 41 via a spindle drive (also not shown in detail). Through the thus arranged coupling mec.h~
36 the linear drive 39 causes a sliding movement of the cutting means 30 and of its pivot means 31 with respect to the tube 4 to be treated in the longih~(lin~l direction L thereo A further coupling mechanism 42 is provided between the pivot means 41 of the cutting means 30 and the cylinder 28 of the pneumatic ram drive 24 in order to adjust the cutting direction A automatically and exactly in the radial direction of the respective tube depending on the diameter D of the tube 4 to be treated. This coupling meçh~ni~m 42 comprises on a splined shaft 29 a coupling arm 43 which is rotationally fixed thereon but in the lon~ltlin~l direction (double arrow V in Fig. 2) movably supported and which is an upwardly directed one arm lever. At the free end of the coupling arm 43 a connecting rod 44 is coupled with the support disk 34 of the pivot means 31 in the way of a slider-crank ,.,e~.h~ ." is driven. The articulation 45 between the co~ rod 44 and the support disk 34 then dia"~et~ically opposes the cutting head 32 ofthe cutting means 30.
The coupling arm 43 and the conlle~ g rod 44 on the one side and the pneumatic ram drive 25 together with the second arm 24 of the press lever 20 on the other side form via the splined sha~ 29 pivotably coupled articulated lever arrangelllellls by means of which an automatic adjustment of the pivot means 31 for adjusting the position of the cutting head 32 to the desired cutting position is caused via the pivot movement of the cylinder 28 which is caused by the movement of the ram drive 24. This will be explained in the following.
In Fig. 1 the cutting means 30 is shown in the optimal cutting position for a tube 4 with a relatively large di~met~.r. The cutting direction A is then exactly radially arranged with respect to the cross-section of the tube or - in other words - perpendicular to the tangent at the wall 46 of the tube which is arranged at its contact point with the right hand side support disks 15' 16', 17' on the rear support shaft 6. If a tube with a distinctly smaller diameter is now put in the gore like support region 18 and the ram drive 25 is act~l~ted such that the piston rod 26 is drawn into the cylinder 28 the press lever 20 lowers itself counterclockwise as seen in Fig. 1 until the press pulley 25 rests again on the tube. By this pivotal movement of the press lever 20 the rarn drive 25 is raised clockwise. Thereby the splined shaft 29 rotates also clockwise and pulls the coupling arm 43 in this direction. The connecting rod 44 is drawn to the right as seen in Fig. 1 such that the support disk 34 of the pivot means 31 is rotated counterclockwise by the coupling of the slider-crank m~h~ni~m between the connecting rod 44 and the support disk 34. The cutting means 30 2 1 8 t 644 lowers itself such that the cutting direction A of its cutting head 32 is again exactly radial with respect to the circular cross-section of the tube to be treated. By the forced coupling ofthe pivoting means 31 with the press lever 20 described above, the desired pivot position ofthe cutting means 30 corresponding to the ~ meter of the ~ espe~ /e tube to be treated is adjusted automatically.
As is particularly clear from Fig. 2, the cutting means according to the present invention comprises a clamping means 47 connected to the guide block 38 for moving the tube 4 parallel to its lon i~ltlin~l direction L. In connection therewith is provided a pneumatic ram drive 48 ~ ged on the guide block 38 at the vertically extending piston rod 49 of which a clamping gripper 50 is arranged which can be lifted from below towards the`tube 4 and can lift the tube 4. Furthermore, at the guide block 38 there is provided a double cheek cross arm 51 which extends lea w~rds and is provided in front of its rear end with downwardly ex~çn~ing support cheeks 52. At the rear end a stud 53 is provided which is flush in the longit~ltlin~l direction of the tube with the stud 23 and which supports at its bent end a lever-like holding clamp 54 with a press pulley 54 on the axis 55' analogous to the press lever 20. Attached to this holding clamp 54 is another pneumatic ram drive 56 with its piston rod 57. Ram drive 56 is articulated via its cylinder 58 at an axis 74 which extends between the support cheeks 52. By this arrangement the ram drive 56 and the holding damp 54 can be driven by the linear drive 39 synchronously with the clamp gripper 50 via the guide block 38 in the longituf~in~l direction L ofthe tube.
In Fig. 3 a block diagram of the control means 63 is shown. Its main part is a personal computer 64 with a standard keyboard 65 and a monitor 66. Within the personal computer 64 a program which will not be cA~l~led in detail is stored which controls the components 21~1644 lo of the machine by CNC. For this purpose the personal computer 64 is provided with a driver circuit 67 for solenoid valves 68 which are arranged in corresponding pressure lines between a source 69 of pressurised air and the ram drives 25, 48,56. Furth~ ol~, the personal computer 64 is provided with a control board 71 for the power output stages 72 of the stepper motors 11, 41.
As an example, by means of this control means 63 the following exemplified operation for achieving the particular form of the end 73 of the tube 4 shown in Fig. 1 can be achieved:
While the pressing lever 20 and the holding clamp 54 are lifted upwards the tube 4 is put onto the gore ~ke support region 18 of the support disks 15, 16,17,15',16',17' such that the end 73' of the tube (in Fig I in phantom) extends in the longih1tlin~1 direction of the tube over the cutting means 30. By ~ ting the ram drive 25 the press lever 20 is lowered until its press down pulley 21 rests on the tube 4 such that the tube is positively held. By the lowering movement of the press lever 20 the coupling meçh~ni~m 42 of the cutting head 32 is moved at the same time into the desired pivot position. The clamp gripper 50 and the holding clamp 54 are meanwhile lowered and are no longer in contact with the tube wa~ 46.
Now, the cutting operation of the tube end 73 can be performed. For this purpose the cutting means 39 is activated, and by activating the stepper motors 11 and 41 the cutting contour indicated in Fig. 2 will be obtained. The tube 4 performs only a rotational movement, e.g. dockwise, which is caused by the stepper motor 41 and the rotation of the support disks 15,16, 17, 15',16', 17' in the same direction. Stepper motor 41 causes the cutting means 30 to perform at the same time an oscillatory linear movement parallel to the longitudinal direction L of the tube whereby the guide block 38 is reciprocated by the stepper motor 41.
For example, if it is intended subsequently to provide the tube with a central cutout for introducing a second tube the ram drive 25 is driven and the press lever 20 is pivoted upwards. At the same time the clamp gripper 50 and the holding clamp 54 are engaged with the tube 4 by a corresponding actuation of the ram drives 48 and 56 by the control means 63 such that the tube is gripped and lifted from the gore-like support region 18.
Therea~er, by driving the stepper motor 41 the tube can be moved to the right as seen in Fig 2- possibly by a plurality of subsequent opel ~Ih~g steps - such that the central region ofthe tube comes into the region ofthe cutting means 30. Subsequently, the prèss lever 20 is lowered such that the tube 4 is rigidly fastened in the gore like support region 18. After lowering the clamp gripper 50 and li~ing the holding clamp 54 a desired cut can be pel~llned - as has been fii~lssed before - or the tube can be treated from the left side such that tubes being coped at both sides and possibly having cutouts with defined angles of the cut outs relative to each other can be produced in a single process.
It is furthermore pointed out that as a result of the articulated lever arrangement which is formed by the second arm 24 of the press lever 20 and the ram drive 25, clamping forces are executed by the press down pulley 21 while a constant air pressure is applied on the ram drive 25. The clamping forces are adapted to the diameter and by this to the weight of the tube to be treated. For tubes with a high diameter which generally have thick walls and Llæ-~rol~ are inert, high clamping forces are produced which allow a good acceleration by the stepper motor 11 in the rotational direction and by the stepper motor 41 in the conveying direction. Considerably smaller clamping forces are produced for thinner tubes since the pivot point 27 of the articulated lever arrangement between the ann 24 and the rarn drive 25 moves in the direction of the line connecting the pivot axes S I and S2.
Since the holding clamp 54 with its ram drive 56is formed analogously to the press down means 19 with its press down lever 20 and its ram drive 25, the above explanation equally applies to the holding clamp 54.
From DE-C242 19 431 describes an appal~lus for coping or scalloping of tubes is known which appal aLus comprises a frame and a rotating support means connected to said frame for rotationally supporting the tube to be treated. Furthermore, this appal~lus has a tool-free cutting means working in a contact-free manner for treating the tube, in particular a laser cutting means, an autogenous torch-cutting means, a waterjet cutting means or a plasma cutting means, which is movably guided in two-dimensions relative to the tube within a plane Iying within the rotational axis of the tube via linear actuators on a compound rest guiding means on the frame. For machine cutting of the tube, the rotation of the tube and the movement of the cutting means superposed therewith are controlled by a control means which is connected to the rotational actuator of the support means and the linear actuators of the compound rest guiding means.
A disadvantage of the known tube cutting appal~lus is the fact that the compound rest guiding means for the cutting appal~lus has a complicated construction since it comprises linear actuators crossing each other. Furthermore, the control is rather complicated since the app~lus comprises two linear actuators.
Furthermore, that in the known cutting appal~ s it is necessary to bring the cutting means from its working position upwards into a stand-by position in order to remove the work piece from the support means and to introduce a new workpiece. After having introduced a new work piece it is necess~ry to move the cutting means again close to the work piece.
This procedure requires additional time for the exchange of work pieces leading to a reduction of the capacity of the m~çhining ap~ s. Furthermore, movement of the cutting means close to the work piece requires a detector in the form of a limit switch to prevent the cutting means from touching the tube. The limit switch itself has to be incorporated in the control meçh~ni~m which further increases the complexity of the control process.
In view of the above problems it is an object of the present invention to provide a simplified apparatus for machine cutting of tubes without red~lçing the versatility of the apparatus. In particular, the compound rest guiding means of the prior art should be omitted in order to dispense with one of the linear actuators. At the same time the cutting means should be such that the replacement of work pieces can be performed faster.
This object is solved by a cutting apparatus characterised by the features according to claim 1. According to such a cutting apparatus a conventional, rotatable support means for rotationally suppor~ing the tube to be treated is used. The support means comprises at least _ ~18164~
two pairs of disks which are spaced in the longitudinal direction of the tube, with ~i./ely two disks aligned in parallel to each other. Each pair of disks-forms by a lateral offset ofthe rotational axes of the disks a gore-like or s~andlel-like support region for the tube to be treated into which region it can simply be put. As result of the inventive features of the cutting apparatus the compound rest guiding means can be omitted completely since the cutting means working in a contact-free manner is pivotally supported at a pivot means, the pivot axis of which being is concentric ~,vith a rotational axis of one of the disks of the support means for the tube. The cutting head of the cutting means is arranged at its desired working distance with respect to the gore like support region, and has its cutting direction radially arranged with respect to the pivot axis. The pivot means is forced to couple via a coupling means with the press lever of a press down means, which press lever can be lowered towards the tube and is articulated about a pivot axis parallel to the tube axis at the basic frame. Furthermore, the press lever can be pressed in the direction of the gore like support region, such that it presses from above on a tube Iying in the rotationally driven support means and ,.~ it in position. By this plessing the press lever scans practically the ~ mtq,ter of the tube to be treated. As a result of the forced coupling via the coupling mech~ni~m between the pivot means for the cutting means and the press lever the cutting means automatically adjusts itselfto the desired position collt;~l,onding to the diameter of the tube to be treated. In this position the cutting head is perpendicular to the tangent at the wall of the tube at the desired working distance. The subsequent cutting of the tube with a cutting guidance which can be chosen virtually a~bill~ily within certain limits is then performed by a superimposed movement of the rotational and linear movements of the tube and of the cutting means relative to each other, which movement is controlled by a control means via a s~lp~rimposed driving of the actuator of the rotationally actuated tube support means and of the linear drive for the relative displacement of the cutting means and of the tube to be treated in the longitll~in~l direction of the tube.
The above ~ ~pl ~ c make clear that in contrast to the prior art only one linear drive and one rotational drive have to be driven, which results in reduced effort for the control technique and the construction.
Since the cutting means is furthermore arranged in the neighbourhood of one of the rotational axes ofthe pairs of disks ofthe rotationally driven support means - i.e. below the tube - it is not necessary to remove the cutting means upward for the replacement of a work piece as is the case in the prior art. When a workpiece with a di~erenl diameter is introduced, only the desired pivot position of the cutting means has to be adjusted, which occurs automatically via the coupling means.
Further features, details, advantages and pl ere~ I ed embodiments of the present invention can be de~ d from the claims and the following description in which one embodiment of the invention is explained in more detail in conjunction with the drawings wherein:
Fig. 1 is a s.~h~n ~tic view of the cutting means according to the present invention along the longitll~in~l direction of the tube.
Fig. 2 is a side view of the cutting means of Fig. 1 along the direction of arrow II.
Fig. 3 is a block diagram of the control means of the cutting means according to the present invention.
2 1 8 1 6~4 The apparatus for m~hine cutting of tubes, which is shown in Figs. I and 2 in its entirety, however without the control means (see Fig. 3), comprises a base frame l with a base plate 2. On this plate are ~tt~.hed three support cheeks 3 ~ n~l;ng upwuds, the main planes of which are, respectively, vertical and perpendicular to the longit~ltlin~l direction L of the tube 4 to be treated. At these three support cheeks 3, two support shafts 5, 6 are rotationally supported. The support shafts extend parallel to the longitudinal direction L of the tube at the same height and adjacent to each other. A first gear 7 is rigidly attached to the left support shaft 5 as seen in Fig. 2 and is connected via a toothed belt 8 with a gear 9 on the driving shaft 10 of a step motor 11 which is ~tt~.hed on the base plate 2.
D;s,~laced in the axial direction with respect to the first gear 7, a second gear 12 is attached to the support shaft 5. In an axial position which is in ~lignm~nt thelewilll a furth`er gear 13 is rigidly attached to the second support shaft 6. The gears 12, 13 are connected ,vith each other by a further toothed belt 14 such that the two support shafts 5, 6 are synchronously rotated in the same direction when the step motor 11 is driven. Instead of the toothed belts 8, 14 chains can be used.
On each of the support shafts 5, 6 there are furthermore rigidly attached three support disks 15, 16, 17 and 15', 16', 17', each one of the support disks 15, 16, 17 on the one support shaft S showing a small axial displacement with respect to the corresponding support disk 15', 16', 17' on the other support shaft such that the corresponding support disks 15, 15', 16, 16' and 17, 17' on the two support shafts form pairs of disks, respectively.
In view of the lateral distance of the two support shafts 5, 6, the diameter of the support disks 15, 16, 17, 15', 16', 17' is such that the two corresponding support disks 15, 15', 16, 16' and 17, 17' overlap, respectively, as seen in the axial direction of the support shafts such that they form a gore-like support region 18 for the tube 4 to be treated. By introducing the - 2181fi44 tube 4 into this gore-like support region 18 the radial position of the tube is exactly defined. By a rotation of the support disks 15, 15', 16, 16' and 17, 17', the tube 4 is rotated about its longitll-lin~l axis.
In order to fix the radial position of the tube within the support region 18 during the cutting process, which will be explained latter, a press down means 19 is provided for the tube 4. This press down means 19 comprises a frame like press lever 20 which can be lowered from above onto the tube 4 and by which the tube 4 can be pressed down, through a press pulley 21, in the direction of the gore like support region 8. The pulley freely rotates about an axis 20' at the free end of the press lever 20. As is app~ elll from Fig. 1, which shows a side elevational view, the press lever is formed as a bent lever`whose first arm 22 forms the actual press down means for the tube 4 and is articulated about a pivotal axis S1 on a stud 23 on the base plate 2 of the base frame I Iying parallel to the longihl-lin~l direction L of the tube. A pneumatically ~ch~ted ram drive 25 with a piston rod 26 is engaged with the ess~nti~lly downwards extt?nr~ing arm 24 of the press lever via an articulation 27.
The cylinder 28 of the ram 25 is pivotally driveri about a pivotal axis S2 parallel with the longit~lflin~l tube direction L at its end 28' remote from the piston rod on a so called splined sha~ 29 whereas the cylinder 28 is fixedly connected with the splined shaft 29. The object of this particular type of support will be explained in the following in further detail There is furthermore provided a tool-free plasma cutting means 30 working in a contact-free manner for the m~.hine cutting of the tube 4. The plasma cutting means is pivotably supported at a pivot means denoted in its entirety with 31, about a pivot axis S3 which is arranged concelll,ically with the rotational axis of the rear support shaft 6. The cutting head 32 is then ~ ged at the desired working distance (Fig. 1) from the gore like support region 18. The cutting head 32 ofthe cutting means is furthelmol-e connected via a support plate 33 to a pivotably supported support disk 34 of the pivot means 31, which will be desc-ibed in detail below, such that the cutting direction A ofthe cutting head 32 is radially all~lged with respect to the pivot axis S3.
The support disk 34 is ~tt~çhed at a perpendicularly arranged arm 35 of a coupling me~h~nicm 36 which comprises a coupling rod 37 supporting said arm 35 and exten(lin~
parallel to the longitudinal direction L of the tube. Said coupling rod 37 is attached at a guide block 38 which is movable holi,o,llally and linearly parallel to the longit~ in~l direction L of the tube and whose movement is caused by a linear drive 39. The guide block 38 is therefore movably guided in a sliding guide (not shown in detail) in a pedestal 40 on the support plate 2 along this direction and is connected with a stepper motor 41 via a spindle drive (also not shown in detail). Through the thus arranged coupling mec.h~
36 the linear drive 39 causes a sliding movement of the cutting means 30 and of its pivot means 31 with respect to the tube 4 to be treated in the longih~(lin~l direction L thereo A further coupling mechanism 42 is provided between the pivot means 41 of the cutting means 30 and the cylinder 28 of the pneumatic ram drive 24 in order to adjust the cutting direction A automatically and exactly in the radial direction of the respective tube depending on the diameter D of the tube 4 to be treated. This coupling meçh~ni~m 42 comprises on a splined shaft 29 a coupling arm 43 which is rotationally fixed thereon but in the lon~ltlin~l direction (double arrow V in Fig. 2) movably supported and which is an upwardly directed one arm lever. At the free end of the coupling arm 43 a connecting rod 44 is coupled with the support disk 34 of the pivot means 31 in the way of a slider-crank ,.,e~.h~ ." is driven. The articulation 45 between the co~ rod 44 and the support disk 34 then dia"~et~ically opposes the cutting head 32 ofthe cutting means 30.
The coupling arm 43 and the conlle~ g rod 44 on the one side and the pneumatic ram drive 25 together with the second arm 24 of the press lever 20 on the other side form via the splined sha~ 29 pivotably coupled articulated lever arrangelllellls by means of which an automatic adjustment of the pivot means 31 for adjusting the position of the cutting head 32 to the desired cutting position is caused via the pivot movement of the cylinder 28 which is caused by the movement of the ram drive 24. This will be explained in the following.
In Fig. 1 the cutting means 30 is shown in the optimal cutting position for a tube 4 with a relatively large di~met~.r. The cutting direction A is then exactly radially arranged with respect to the cross-section of the tube or - in other words - perpendicular to the tangent at the wall 46 of the tube which is arranged at its contact point with the right hand side support disks 15' 16', 17' on the rear support shaft 6. If a tube with a distinctly smaller diameter is now put in the gore like support region 18 and the ram drive 25 is act~l~ted such that the piston rod 26 is drawn into the cylinder 28 the press lever 20 lowers itself counterclockwise as seen in Fig. 1 until the press pulley 25 rests again on the tube. By this pivotal movement of the press lever 20 the rarn drive 25 is raised clockwise. Thereby the splined shaft 29 rotates also clockwise and pulls the coupling arm 43 in this direction. The connecting rod 44 is drawn to the right as seen in Fig. 1 such that the support disk 34 of the pivot means 31 is rotated counterclockwise by the coupling of the slider-crank m~h~ni~m between the connecting rod 44 and the support disk 34. The cutting means 30 2 1 8 t 644 lowers itself such that the cutting direction A of its cutting head 32 is again exactly radial with respect to the circular cross-section of the tube to be treated. By the forced coupling ofthe pivoting means 31 with the press lever 20 described above, the desired pivot position ofthe cutting means 30 corresponding to the ~ meter of the ~ espe~ /e tube to be treated is adjusted automatically.
As is particularly clear from Fig. 2, the cutting means according to the present invention comprises a clamping means 47 connected to the guide block 38 for moving the tube 4 parallel to its lon i~ltlin~l direction L. In connection therewith is provided a pneumatic ram drive 48 ~ ged on the guide block 38 at the vertically extending piston rod 49 of which a clamping gripper 50 is arranged which can be lifted from below towards the`tube 4 and can lift the tube 4. Furthermore, at the guide block 38 there is provided a double cheek cross arm 51 which extends lea w~rds and is provided in front of its rear end with downwardly ex~çn~ing support cheeks 52. At the rear end a stud 53 is provided which is flush in the longit~ltlin~l direction of the tube with the stud 23 and which supports at its bent end a lever-like holding clamp 54 with a press pulley 54 on the axis 55' analogous to the press lever 20. Attached to this holding clamp 54 is another pneumatic ram drive 56 with its piston rod 57. Ram drive 56 is articulated via its cylinder 58 at an axis 74 which extends between the support cheeks 52. By this arrangement the ram drive 56 and the holding damp 54 can be driven by the linear drive 39 synchronously with the clamp gripper 50 via the guide block 38 in the longituf~in~l direction L ofthe tube.
In Fig. 3 a block diagram of the control means 63 is shown. Its main part is a personal computer 64 with a standard keyboard 65 and a monitor 66. Within the personal computer 64 a program which will not be cA~l~led in detail is stored which controls the components 21~1644 lo of the machine by CNC. For this purpose the personal computer 64 is provided with a driver circuit 67 for solenoid valves 68 which are arranged in corresponding pressure lines between a source 69 of pressurised air and the ram drives 25, 48,56. Furth~ ol~, the personal computer 64 is provided with a control board 71 for the power output stages 72 of the stepper motors 11, 41.
As an example, by means of this control means 63 the following exemplified operation for achieving the particular form of the end 73 of the tube 4 shown in Fig. 1 can be achieved:
While the pressing lever 20 and the holding clamp 54 are lifted upwards the tube 4 is put onto the gore ~ke support region 18 of the support disks 15, 16,17,15',16',17' such that the end 73' of the tube (in Fig I in phantom) extends in the longih1tlin~1 direction of the tube over the cutting means 30. By ~ ting the ram drive 25 the press lever 20 is lowered until its press down pulley 21 rests on the tube 4 such that the tube is positively held. By the lowering movement of the press lever 20 the coupling meçh~ni~m 42 of the cutting head 32 is moved at the same time into the desired pivot position. The clamp gripper 50 and the holding clamp 54 are meanwhile lowered and are no longer in contact with the tube wa~ 46.
Now, the cutting operation of the tube end 73 can be performed. For this purpose the cutting means 39 is activated, and by activating the stepper motors 11 and 41 the cutting contour indicated in Fig. 2 will be obtained. The tube 4 performs only a rotational movement, e.g. dockwise, which is caused by the stepper motor 41 and the rotation of the support disks 15,16, 17, 15',16', 17' in the same direction. Stepper motor 41 causes the cutting means 30 to perform at the same time an oscillatory linear movement parallel to the longitudinal direction L of the tube whereby the guide block 38 is reciprocated by the stepper motor 41.
For example, if it is intended subsequently to provide the tube with a central cutout for introducing a second tube the ram drive 25 is driven and the press lever 20 is pivoted upwards. At the same time the clamp gripper 50 and the holding clamp 54 are engaged with the tube 4 by a corresponding actuation of the ram drives 48 and 56 by the control means 63 such that the tube is gripped and lifted from the gore-like support region 18.
Therea~er, by driving the stepper motor 41 the tube can be moved to the right as seen in Fig 2- possibly by a plurality of subsequent opel ~Ih~g steps - such that the central region ofthe tube comes into the region ofthe cutting means 30. Subsequently, the prèss lever 20 is lowered such that the tube 4 is rigidly fastened in the gore like support region 18. After lowering the clamp gripper 50 and li~ing the holding clamp 54 a desired cut can be pel~llned - as has been fii~lssed before - or the tube can be treated from the left side such that tubes being coped at both sides and possibly having cutouts with defined angles of the cut outs relative to each other can be produced in a single process.
It is furthermore pointed out that as a result of the articulated lever arrangement which is formed by the second arm 24 of the press lever 20 and the ram drive 25, clamping forces are executed by the press down pulley 21 while a constant air pressure is applied on the ram drive 25. The clamping forces are adapted to the diameter and by this to the weight of the tube to be treated. For tubes with a high diameter which generally have thick walls and Llæ-~rol~ are inert, high clamping forces are produced which allow a good acceleration by the stepper motor 11 in the rotational direction and by the stepper motor 41 in the conveying direction. Considerably smaller clamping forces are produced for thinner tubes since the pivot point 27 of the articulated lever arrangement between the ann 24 and the rarn drive 25 moves in the direction of the line connecting the pivot axes S I and S2.
Since the holding clamp 54 with its ram drive 56is formed analogously to the press down means 19 with its press down lever 20 and its ram drive 25, the above explanation equally applies to the holding clamp 54.
Claims (8)
1. Apparatus for machine cutting of tubes, in particular for the mechanical coping of tube ends, for forming cut outs in the tube walls etc., comprising:
- a base frame (1), - a rotationally driven support means attached to said base frame for supporting the tube (4) to be treated and comprising at least two pairs of support disks (15, 16, 17, 15', 16', 17') which are spaced in the longitudinal direction (L) of the tube and are arranged parallel to each other, each of the pairs of support disks (15, 16, 17, 15', 16', 17') forming by a lateral displacement of support shafts (5, 6) of the support disks (15, 16, 17) a gore-like support region (18) for the tube (4) to be treated, - a press-down means (19) for the tube to be treated in the form of a press lever (20) which is lowerable upon the tube (4) and is articulated at the base frame (1) about a pivot axis (S1) which lies parallel to the longitudinal direction (L), and can be pressed in the direction of the gore-like support region (18), - a tool-free cutting means (30) working in a contact-free manner, in particular a laser cutting means, an autogenous torch-cutting means, a water-jet cutting means or a plasma cutting means (30), -- which is pivotably supported about a pivot axis (S2) at a pivot means (31) which pivot axis is concentric with one support shaft (5, 6) of one of the support disks ( 15, 16, 17, 15', 16', 17') of the support means for the tube (4), -- the cutting head (32) of which is arranged at a desired working distance (a) from the gore-like support region (18) and has its cutting direction (A) radially arranged with respect to the pivot axis (S1), and -- the pivot means (31) of which is force coupled via a coupling mechanism (42) with the press lever (20) of the press-down means (19) such that the press lever (20) automatically adjusts the desired pivot position of the cutting means (30) which corresponds to the diameter of the tube (4) to be treated, - a linear drive (39) for a relative movement of the cutting means (30) with respect to the tube (4) in the longitudinal direction (L) of the tube, and - a control means (63) which is coupled with a rotational drive (11) of the rotationally driven support means and with the linear drive (39) for said relative movement for producing a superimposed rotational-linear movement of the tube (4) relative to the cutting means (30).
- a base frame (1), - a rotationally driven support means attached to said base frame for supporting the tube (4) to be treated and comprising at least two pairs of support disks (15, 16, 17, 15', 16', 17') which are spaced in the longitudinal direction (L) of the tube and are arranged parallel to each other, each of the pairs of support disks (15, 16, 17, 15', 16', 17') forming by a lateral displacement of support shafts (5, 6) of the support disks (15, 16, 17) a gore-like support region (18) for the tube (4) to be treated, - a press-down means (19) for the tube to be treated in the form of a press lever (20) which is lowerable upon the tube (4) and is articulated at the base frame (1) about a pivot axis (S1) which lies parallel to the longitudinal direction (L), and can be pressed in the direction of the gore-like support region (18), - a tool-free cutting means (30) working in a contact-free manner, in particular a laser cutting means, an autogenous torch-cutting means, a water-jet cutting means or a plasma cutting means (30), -- which is pivotably supported about a pivot axis (S2) at a pivot means (31) which pivot axis is concentric with one support shaft (5, 6) of one of the support disks ( 15, 16, 17, 15', 16', 17') of the support means for the tube (4), -- the cutting head (32) of which is arranged at a desired working distance (a) from the gore-like support region (18) and has its cutting direction (A) radially arranged with respect to the pivot axis (S1), and -- the pivot means (31) of which is force coupled via a coupling mechanism (42) with the press lever (20) of the press-down means (19) such that the press lever (20) automatically adjusts the desired pivot position of the cutting means (30) which corresponds to the diameter of the tube (4) to be treated, - a linear drive (39) for a relative movement of the cutting means (30) with respect to the tube (4) in the longitudinal direction (L) of the tube, and - a control means (63) which is coupled with a rotational drive (11) of the rotationally driven support means and with the linear drive (39) for said relative movement for producing a superimposed rotational-linear movement of the tube (4) relative to the cutting means (30).
2. Apparatus according to claim 1 characterised in that the press lever (20) is formed as a bent lever whose first arm (22) forms the press down means for the tube (4) and at the second arm (24) of which the piston rod (26) of a ram drive (25) is attached for actuating the press lever (20).
3. Apparatus according to claim 2 characterised in that - the cylinder (28) of the ram drive (25) is driven in a rotationally fixed manner with respect to an axis (29) which is pivotably supported on the base frame (2), - a coupling arm (43) of the coupling mechanism (42) is rotationally fixed but translationally movable on said axis (29), and - a connecting rod (44) of the coupling mechanism (42) is engaged in an articulated manner between the coupling arm (43) and the pivot means (41) such that the articulation of the ram (25) and the ensuing pivotal movement of the cylinder (28) cause an adjustment of the pivot means (31) for moving the cutting head (32) into the desired cutting position.
4. Apparatus according to claim 3 characterised in that the second arm (24) of the pressing lever (20) together with the ram drive (25) on the one side and the coupling arm (43) together with the connecting rod (44) on the other side form articulated lever arrangements, respectively, and that the connecting rod (44) is coupled with a support disk (34) of the pivot means (31) in the form of a slider-crank mechanism.
5. Apparatus according to any of the claims 1 to 4 characterised in that the pivot means (31) of the cutting means (30) is attached at a guide block (38) which is movably driven in a direction parallel to the longitudinal direction (L) of the tube.
6. Apparatus according to claim 5 characterised in that a clamping means (47) for moving the tube (4) in parallel to its longitudinal direction (L) is attached at the guide block.
7. Apparatus according to claim 6 characterised in that the clamping means (47) comprises a clamp gripper (50) which is movable from below towards the tube (4) and lifts the same, and a holding clamp (54) which is lowerable from above towards the tube (4).
8. Apparatus according to claim 7 characterised in that the holding clamp (54) is drivable by a ram drive (54), the holding clamp (54) and the ram drive (56) being fixed together at a cross arm (51) which is fixed to the guide block.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19528109.8 | 1995-08-01 | ||
| DE19528109A DE19528109A1 (en) | 1995-08-01 | 1995-08-01 | Device for machine cutting pipes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2181644A1 true CA2181644A1 (en) | 1997-02-02 |
Family
ID=7768326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002181644A Abandoned CA2181644A1 (en) | 1995-08-01 | 1996-07-19 | Apparatus for machine cutting of tubes |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0761362A1 (en) |
| CA (1) | CA2181644A1 (en) |
| DE (1) | DE19528109A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105710487A (en) * | 2016-04-30 | 2016-06-29 | 桐乡市红旗塑料包装袋厂 | Steel pipe placing and cutting device |
| CN107932331A (en) * | 2018-01-17 | 2018-04-20 | 枣庄福源环能机械制造有限公司 | With the guide roller transmission device of angle grinder incising pipes |
| CN109926734A (en) * | 2019-04-02 | 2019-06-25 | 济南金威刻科技发展有限公司 | A kind of tubing determines section laser cutting machine |
| CN110587083A (en) * | 2019-09-25 | 2019-12-20 | 四川东泉机械设备制造有限公司 | Rivet welding auxiliary pressing tool |
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| AT501782B1 (en) * | 2005-04-21 | 2008-12-15 | Voest Alpine Ind Anlagen | APPARATUS AND METHOD FOR SAMPLING |
| CN102229208B (en) * | 2011-02-16 | 2013-12-18 | 中铁五局（集团）有限公司 | Cement fly-ash gravel (CFG) pile head cutting device |
| CN103358082A (en) * | 2012-03-28 | 2013-10-23 | 昆山宝锦激光拼焊有限公司 | Clamp for laser cutting |
| CN103028849B (en) * | 2012-12-06 | 2015-06-10 | 武汉法利莱切割系统工程有限责任公司 | Automatic material feeding and discharging device of laser pipe cutting machine |
| CN103433683B (en) * | 2013-09-04 | 2016-04-13 | 天津思为机器设备有限公司 | A kind of barrel soldering supporting tool |
| CN105642999B (en) * | 2016-03-17 | 2017-12-22 | 中冶辽宁德龙钢管有限公司 | Follower mechanism and its operating method during a kind of spiral welded pipe Pipe Cutting |
| CN107089034A (en) * | 2017-04-28 | 2017-08-25 | 旌德县成宇纸管厂（普通合伙） | A kind of system for making paper tube |
| CN107139245A (en) * | 2017-04-28 | 2017-09-08 | 旌德县成宇纸管厂（普通合伙） | A kind of paper tube diced system |
| CN109014398A (en) * | 2018-08-14 | 2018-12-18 | 柯昌文 | Pipe cutter |
| CN115138943A (en) * | 2022-06-22 | 2022-10-04 | 北京石油化工学院 | Multifunctional underwater TIG electric arc repair welding drainage device and repair method |
| CN115476110A (en) * | 2022-10-11 | 2022-12-16 | 山东方大新材料科技有限公司 | Positioning device for processing oil field conveying pipeline and using method thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE264261C (en) * | ||||
| DE3028538A1 (en) * | 1980-07-28 | 1982-02-25 | Siemag Transplan Gmbh, 5902 Netphen | SCISSOR SYSTEM FOR BOWLING THE ENDS AND / OR FOR SEPARATING SAMPLE PIECES ON TAPE WINDED ROLLING ROLL OR THE LIKE. |
| DE3138483A1 (en) * | 1981-09-28 | 1983-04-14 | Deutsche Gesellschaft für Wiederaufarbeitung von Kernbrennstoffen mbH, 3000 Hannover | "DEVICE FOR POSITIONING, CONNECTING AND EDITING COMPONENTS" |
| DE3822833C1 (en) * | 1988-07-06 | 1989-10-26 | Kloeckner-Wilhelmsburger Gmbh, 2054 Geesthacht, De | |
| DD288120A5 (en) * | 1989-09-29 | 1991-03-21 | Veb Kranbau Eberswalde,De | DEVICE FOR HEAD-COLORED MACHINING OF ROTATING TUBULAR BODY |
| IT1246464B (en) * | 1990-10-19 | 1994-11-18 | Sala Spa | MACHINE TOOL, WITH HEAD FOR THE GENERATION OF A LASER BEAM, FOR THE PROCESSING AND CUTTING OF TUBES. |
| DE4219431C2 (en) * | 1992-06-13 | 1994-08-04 | Albert Seufert | Device for mechanically notching pipes |
-
1995
- 1995-08-01 DE DE19528109A patent/DE19528109A1/en not_active Withdrawn
-
1996
- 1996-07-18 EP EP96111223A patent/EP0761362A1/en not_active Withdrawn
- 1996-07-19 CA CA002181644A patent/CA2181644A1/en not_active Abandoned
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105710487A (en) * | 2016-04-30 | 2016-06-29 | 桐乡市红旗塑料包装袋厂 | Steel pipe placing and cutting device |
| CN105710487B (en) * | 2016-04-30 | 2017-12-22 | 江山达人科技服务有限公司 | A kind of steel pipe places cutter device |
| CN107932331A (en) * | 2018-01-17 | 2018-04-20 | 枣庄福源环能机械制造有限公司 | With the guide roller transmission device of angle grinder incising pipes |
| CN109926734A (en) * | 2019-04-02 | 2019-06-25 | 济南金威刻科技发展有限公司 | A kind of tubing determines section laser cutting machine |
| CN110587083A (en) * | 2019-09-25 | 2019-12-20 | 四川东泉机械设备制造有限公司 | Rivet welding auxiliary pressing tool |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19528109A1 (en) | 1997-02-06 |
| EP0761362A1 (en) | 1997-03-12 |
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| Date | Code | Title | Description |
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| FZDE | Dead |
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