CN2269265Y - Laser seam cutting machine for sieve tube - Google Patents

Abstract

The utility model belongs to a laser processing machine tool, which is provided for overcoming the existing problems of quality and technology of wire winding sieve tubes and sieve tubes which use ceramic blades for kerf. The special machine tool is composed of a laser, an optical cutting head, a work table and a control table. The cutting head of the machine tool can do three-way translation and a rotation, and the work table can provide translations and rotations for work pieces. The work pieces can do complicated synthetic motions to laser beams under the control of a computer and software, and therefore, various seams can be cut, and curve seams, fold line seams and trapezoid seams, which can not be cut by sheet-shaped knives, can be cut by the machine tool. The utility model is characterized in high productivity, good quality and convenient operation and is suitable for the mass processing of sieve tubes.

Description

The laser slotted machine of screen casing

The utility model belongs to laser process machine, and it relates to a kind of structure of using the slot lathe of laser technology.

Screen casing is the underground piping that is used in completion in oil well, the gas well or sand control, it should have the productivity ratio height is that area of passage is big, therefore also the performance that prevents that sand grains from passing through will be arranged, the section configuration to size, distribution situation and the slit of having done the slit on pipe all has strict requirement.Early stage screen casing adopts the structure of wrapping wire, with the uniform one-tenth tubular of stainless reinforcing bar, on top presses certain interval winding stainless steel wire and welding and fixes, and forms and sieves the shape pipe.This screen casing is used for sidetracked hole, very easily produces " sleave " phenomenon during horizontal well, makes the sand control failure, can not satisfy the requirement in gas field, oil field.A kind of novel screen casing has appearred again in recent years, promptly on the steel pipe body, cut out finedraw by certain regularity of distribution, can replace wire-wrapped screen in the past with this form, its quality stability is greatly improved, but it also is very limited on processing technology and equipment.At present common processing method is cut with thin ceramic tip, and it exists, and production efficiency is low, cost is high and problem of environment pollution caused, and can only the cutting straight line slit, exists big problem in batch process.Through putting into practice and discovering that the curve seam is sewed with bigger area of passage than straight line, can improve output in the use of oil gas field; In addition, the slit section is trapezoidal, and tangible self-cleaning action is arranged, i.e. the wide width of the seam of outer tube surface less than inner surface of tube, and it can not blocked by sand grains and reduce productivity ratio.To be that the sheet blade is basic do not come out aforesaid curve groove part, and the processing of trapezoidal seam is subjected to size restrictions with sheet cutter processing also difficulty very.Along with the development of industrial technology, the kind of laser process machine is a lot, but the special-purpose laser process machine that is used for cutting processing shaped form or trapezoidal slit screen pipes by using is not also seen.

The purpose of this utility model be for overcome the not enough and general laser process machine that uses on ceramic tip processing screen casing technology and the equipment process the great problem of sieve seam difficulty of a large amount of long tubes special propose a kind of can the Processing Curve seam and the laser slotted machine of the screen casing that stitches of trapezoid cross section, it has adopted advanced laser technology, has the high characteristics of the good productivity ratio of matter.

By as above design, this programme proposed, and to process the cross section be trapezoidal or the laser slotted machine of curve, broken line slit screen pipes by using, it is by laser instrument, optics cutting head, workbench, formed with the console of computer and various coupled movements of software control and laser parameter, its concrete feature is: the CO2 laser generator of dress tape pulse function in its laser instrument, or the YAG laser generator of high-repeat frequency rate high-average power; Its optics cutting head is to have one of three translation to rotate altogether the parts of the transmission laser beam of the free degree everywhere, it is by speculum K, L, M, focus lamp N, height sensor O, lateral pickup P forms, wherein the relative laser instrument of optics cutting head B can be made Y to translation, reflective mirror L, the relative reflective mirror K of the part I of M and focus lamp N can make Z to translation, the relative speculum L of the part II of mirror M and focus lamp N can make X to translation, the center line of focus lamp N is with respect to speculum L, the optical axis of M can rotate, each all is to use the spin guide supporting to translation, the ball-screw transmission, stepper motor or driven by servomotor, rotational motion is by stepper motor or driven by servomotor, and height sensor and lateral pickup all adopt the lathe encoder; Its workbench is the lathe bed parts that feed motion is provided for workpiece, it comprises pedestal, bed surface, driven wheel, tooth bar and hydraulic motor, its driven wheel is by fluid motor-driven, former and later two swivel head supports are housed on bed surface, but the swivel head of clamping work pieces is housed on support, swivel head is with stepper motor or driven by servomotor, in the swivel head support, pass through dirt trap slightly longer of fixed support clamping than workpiece, on support, also pick out a heat extraction pipe, another termination air-introduced machine of heat extraction pipe.

The turnover of the light path of light transmission is 90 ° between three speculums in the optics cutting head in this programme, and the slewing area of its focus lamp is ± 35 °.Dirt trap is the long slab of a semicircular arc in this scheme, and is concave upright during installation.

Adopt this programme can embody following superiority: various coupled movements were to carry out programme-control by computer on the console and software when 1. this lathe was worked, the motion and the machine tool feed motion of each free degree are combined, can form complicated resultant motion, can process trapezoidal seam, curve seam, broken line seam, these all are out of reach concerning ceramic tip machining; 2. the slit surfaces quality of Laser Processing screen casing is good; 3. the speed of its processing is fast, the productivity ratio height, and operating cost is low, so the price of screen casing is low; 4. being suitable for producing in enormous quantities screen casing uses.

Fig. 1, Fig. 2 are the sieve tube slit machine main working parts laser instrument of this programme laser and the schematic diagram of optics cutting head.Fig. 2 is the side view of Fig. 1.

Fig. 3, Fig. 4 are the structural representations of workbench.Fig. 4 is the side view of Fig. 3.

Fig. 5 is the schematic diagram of curve seam.

Fig. 6 is the schematic diagram of broken line seam.

Fig. 7, Fig. 8 are the processing schematic diagrames of trapezoidal seam.

The embodiment of existing accompanying drawings this programme.This scheme is the special purpose machine tool of a processing screen casing.Dress CO2 laser generator or YAG Solid State Laser generator can adopt model a lot, as PRC2200, RS2000SM, RS1000P or CW020 etc. in its laser instrument (A).Speculum (K) is equipped with in its optics cutting head (B) inside, (L), (M), focus lamp (N), height sensor (O), lateral pickup (P), the relative laser instrument of this optics cutting head can be made Y to translation, speculum (L), (M) can make Z to translation with the relative speculum of part I (K) that focus lamp (N) is formed, speculum (M) can be made X to translation with the relative speculum of part II (L) that condenser (N) is formed, focus lamp (N) relatively speculum (L) and (M) between optical axis rotate, each all is to support with spherical guide to translation, the ball-screw transmission, stepper motor or driven by servomotor, it also rotates by stepper motor or driven by servomotor.Spherical guide can be selected the GGB type for use, and ball-screw can be selected the unsteady interior circulation form of FF2 type for use.Height sensor (O) and lateral pickup (P) can be selected LF type lathe encoder for use.Workbench partly adopts with the isometric mode frame of pipe and holds, and pipe range is 12 meters, and bed surface (2) is supported by lathe bed (1), its guide rail is triangle on one side, another side is the plane, and bed surface is by driven wheel (4) and tooth bar (3) transmission, and the rotation of gear is by fluid motor-driven.Swivel head (7) clamping work pieces (11) of bed surface two ends on the runing rest (6), in the swivel head support of two ends by fixed support (13) dirt trap (9) that is being fixedly connected, dirt trap is motionless, its concave surface up forever, swivel head is with stepper motor or driven by servomotor, also pick out a heat extraction pipe (12) on the swivel head support at one end, another termination air-introduced machine of heat extraction pipe, adding has a large amount of distinguished and admirable pipes of crossing to make it cooling man-hour.Computer is housed on the console, can controls the various parameters of various kinematic parameters that are associated and laser instrument by software.Because it can make workpiece make complicated resultant motion with respect to laser beam, so can process broken line seam and curve seam.Draw as for the available rotation cutting head of the processing of trapezoidal seam or with the method for workpiece rotation and biasing.

The design of this programme is verified through various experiments, and the linear velocity of Laser Processing is higher than the speed of machining process, so its productivity ratio height; This lathe is exclusively used in the processing screen casing, so its is easy to operate; The slot roughness that it cuts out is good and size is accurate, and it can cut 〉=seam of 0.1mm, its error is ± 0.05mm.Trapezoidal angle can reach 35 °.Compare with the ceramic tip slot and to have shown great superiority.

Claims (3)

1, cross section, a kind of slit is trapezoidal and the seam type is the laser slotted machine of curve or broken line slit screen pipes by using, it is by laser instrument (A), optics cutting head (B), workbench, formed with computer and the various coupled movements of software control and laser works parameter control platform, its concrete feature is: the CO2 laser generator of dress tape pulse function in its laser instrument, or the YAG laser generator of high-repeat frequency rate high-average power; Its optics cutting head (B) is to have rotation of three translations parts of the transmission laser beam of totally four frees degree, it is by speculum (K), (L), (M), focus lamp (N), height sensor (O), lateral pickup (P) is formed, wherein the relative laser instrument of optics cutting head (A) can be made Y to translation, speculum (L) (M) can be made Z to translation with the relative speculum of part I (K) of focus lamp (N), the relative speculum of part II (L) of speculum (M) and focus lamp (N) can be made X to translation, the center line of focus lamp (N) is with respect to speculum (L), (M) optical axis can rotate, each all is to use the spin guide supporting to translation, the ball-screw transmission, stepper motor or driven by servomotor, rotational motion is by stepper motor or driven by servomotor, and height sensor (O) and lateral pickup (P) all adopt the lathe encoder; Its workbench is the lathe bed parts that feed motion is provided for workpiece, it comprises pedestal (1), bed surface (2), driven wheel (4), tooth bar (3) and hydraulic motor (5), its driven wheel (4) is driven by hydraulic motor (5), former and later two swivel head supports (6) are housed on bed surface, but the swivel head (7) of clamping work pieces (11) is housed on support, swivel head drives with stepper motor or servomotor (10), in the swivel head support,, on support, also pick out a heat extraction pipe (12) by dirt trap (9) slightly longer of fixed support (13) clamping than workpiece.

2, according to the described perforating machine of claim 1, it is characterized in that the light ray bending angle is 90 ° between three speculums in its optics cutting head, the rotational freedom of its focus lamp is ± 35 °.

3, according to the described perforating machine of claim 1, it is characterized in that the dirt trap (9) in this programme is the long slab of a semi arch, its recessed face is upwards.

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