CN101041218A - Orientation device with a big elbow and the processing method of the clamping board - Google Patents

Abstract

The invention relates to a location device for large elbow and the processing method for the clipboard. The location device comprises bottom plate and several clipboards. Clipboards are fixed with the bottom plate. The clipboard comprises bottom part, left wing and right wing. The whole is in V-shape and the left wing is symmetric to the right wing. Circles set by any symmetric points on inner sides of two wings are coincidence with the cross section of large elbow which is set at two points. The machining method is that the clapboard is produced by adopting marking and cutting method on steel plate. The clipboard produced by the method has performances of automatic centering and automatic aligning welding line and makes the motion track of concave welding line of workpeice is changed into circle track. It solves difficult location problem in automatic welding for large elbow. The method provides a simple and easy production method for producing clipboards of location device for large elbow. The produced clipboard is provided with simple structure and low producing cost.

Description

The processing method of big elbow positioner and clamp thereof

Technical field

The present invention relates to a kind of automatic welding device, particularly a kind of processing method that is used for the positioner and the clamp thereof of large caliber bend automatic welding device.

Background technology

At present, manual welding is adopted in the big elbow weld seam welding of China.Said big elbow is the heavy caliber Steel Tube Special connector that is applied in the high-voltage tube roads such as oil transportation, gas transmission, conveying coal slurry, and caliber is more than 630mm, and these pipelines will bear the above high pressure of 100MPa usually.As shown in Figure 1, big elbow is formed by compression molding, laterally zygomorphic two and half elbow welding processing, four weld seams are arranged, be respectively longitudinal arched weld seam AA ' arc, CC ' arc and longitudinal concave weld seam BB ' arc, DD ' arc, these four sections vertical arc-shaped welding seams are four concentrically ringed four sections equal angles camber lines, and its center of circle is O, names elbow with the angle of angle AOA ' usually, as angle AOA ' is 30 degree, claims that then this elbow is 30 degree elbows.Common elbow has 30 degree, 45 degree, 60 degree, 90 degree, 120 degree, 150 degree and one half bends.

Because big elbow volume is big, weight is big, welding quality requires high, existing manual welding technology is difficult to reach even high-quality weld seam requirement continuously, and manual welding labour intensity is big, efficient is low, especially the welding work situation of pipe fitting inside is abominable, damage the healthy of workman, therefore, adopt the big elbow in the automatic welding technique processing pressure piping to become the technical problem that welding technology field presses for solution, and how to locate big elbow, the movement locus that makes its generation is to be fit to the track of welding automatically, is the difficult point of this technology.

In the automatic welding technique field, existing technology comprises that flush joint welds automatically, automatic welding of circumferential seams etc., as Chinese patent CN2595510 " vibration wheel of road roller disc girth joint robot welding system ", has introduced a kind of automatic welding technique of girth joint; Chinese patent CN2552628 " pipe prefabrication automatic welding machine ", the girth joint automatic welding technique that adopts pipe to rotate.Circumferential weld herein as shown in Figure 2, docks formation at the cross section with the steel pipe axis normal; The said concave weld BB ' of the present invention arc, DD ' arc are that two and half elbow sheet spares by compression molding vertically dock and form, referring to Fig. 1.Both are different weld seams, and the longitudinal concave weld seam of big elbow can't be as the movement locus of girth welding around the rotation formation ring-type of workpiece self axis, and giving automatically, welding brings great difficulty.Do not find at present locating clamp plate device that the longitudinal concave seam to big elbow welds automatically and the method for processing this device as yet.

Summary of the invention

At the deficiencies in the prior art, the invention provides a kind of big elbow positioner and processing method thereof.

Big elbow positioner, comprise base plate and some clamps, clamp is fixedlyed connected with base plate, wherein clamp comprises bottom, left wing, right flank, integral body is in the shape of the letter V, left wing and right flank symmetry, the inboard circle of stipulating between the symmetric points arbitrarily of clamp both wings overlaps with the cross section that is installed in this big elbow of 2.

Described clamp left wing and right flank are from up comprising tangent plane, orthodrome and the stopper of little circular arc, two circles successively near the bottom.

A groove is arranged at described roundlet arc bottom.

Described clamp is made by the following method:

(1) as shown in Figure 4, get the enough big steel plate of odd number piece, equidistant vertical laid parallel is got an O ' on the plate of middle, make OO '=3D ₁, wherein, some O is the center of circle of automatic welding device main shaft, D ₁Diameter length for the big elbow of minimum process part set.With O ' is center of circle 2D ₁For radius is justified, meet at an O successively with each steel plate ₀₀, O ₀₁, O ₀₂, at the O that crosses of each steel plate ₀₀, O ₀₁, O ₀₂Each makes a horizontal line O ₀₀O ₀₀', O ₀₁O ₀₁', O ₀₂O ₀₂' ..., with each steel plate along horizontal line O ₀₀O ₀₀', O ₀₁O ₀₁', O ₀₂O ₀₂' ... the alignment level is stacked, as shown in Figure 5;

(2) as shown in Figure 6, at above-mentioned stacked steel plate horizontal line O ₀₀O ₀₀', O ₀₁O ₀₁', O ₀₂O ₀₂' ... on get mid point O ₀, cross O ₀Make O ₀₆O ₀₆' vertical line YO ₀, at YO ₀On get an O ₁, O ₂, make O ₀O ₁=r ₁O ₂O ₀=3r ₂-a, wherein, r ₁Be the radius length of the big elbow of minimum process part set, r ₂Be the radius length of the big elbow of maximum workpiece set, a is the distance that spindle axis arrives dull and stereotyped upper surface;

(3) respectively with O ₁Be the center of circle, r ₁Be radius, O ₂Be the center of circle, r ₂Be radius, make two circles, be their outside common tangent HI, be its outside common tangent H ' I ', respectively with circle O on the right side of two circles in the left side of two circles ₁Meet at H, H ' point, with O ₂Meet at I, I ' point;

(4) cross O ₂Be the vertical line JJ ' of YY ', with circle O ₂Meet at J, J ', cross vertical line JK, J ' K ' that J, J ' point is JJ ' respectively, make JK=J ' K ', get JK, the suitable height of J ' K ';

(5) connect K, K ' and prolongation, get a L, L ' respectively, make LK=K ' L ', get LK, the suitable length of K ' L ' in K, K ' the some outside;

(6) in the both sides of base Y ', get a M, some M ', make Y ' M=Y ' M ', get Y ' M, the suitable length of Y ' M ';

(7) downcut in turn along above-mentioned line segment and circular arc line, cut out by M, L, K, J, I, H, H ', I ', J ', K ', L ', M ', M point form about polygon clamp to becoming, wherein HH ' is roundlet O ₁Circular arc, JI and I ' J ' be great circle O ₂Circular arc;

Also can after step (7), proceed following steps:

(8) on circular arc HH ', at O ₁Open a sulculus NPP ' N ' under the point;

(9) line segment that marks along above-mentioned steps downcuts in turn, cuts out the symmetrical polygon clamp of being made up of M, L, K, J, I, H, N, P, P ', N ', H ', I ', J ', K ', L ', M ', M point.

On the flat board that clamp is fixed to main shaft is fixedlyed connected, the quantity of the big preferred clamp of elbow positioner is 3 to 7.

Big elbow positioner provided by the invention and clamp processing method thereof, this clamp can be with big elbow self-centering of work piece and automatic centering weld seam, make the movement locus of the longitudinal concave weld seam solder joint of the big elbow of workpiece form locus circle, for the automatic welding of big elbow provides suitable positioner, broken through the difficult problem that big elbow longitudinal seam can't weld automatically.And this clamp is simple in structure, and production cost is low.This method provides simple production method for producing this clamp.

Description of drawings

Below in conjunction with accompanying drawing, the invention will be further described.

Fig. 1 is big elbow structure schematic diagram

Fig. 2 is the circumferential weld structural representation

Fig. 3 is big elbow positioning device structure schematic diagram

Fig. 4 is the clamp position view

Fig. 5 is that steel plate stacks structural representation

Fig. 6 is a steel plate line schematic diagram

Fig. 7 is the structural representation of clamp

The specific embodiment

Big elbow positioner, as shown in Figure 3, comprise the some clamps 20 that are fixed on dull and stereotyped 14, big elbow positioner has the function of self-centering and weld seam centering, the clamp structure, as shown in Figure 7, comprise bottom, left wing, right flank, integral body is in the shape of the letter V, left wing and right flank symmetry, the circle of stipulating between any symmetric points of clamp both wings overlaps with the cross section that is installed in this big elbow of 2, as shown in Figure 1, and the promptly round Q of the cross section of big elbow.From up comprise tangent plane, orthodrome and the stopper of little circular arc, two circles successively near the bottom, a groove is arranged at roundlet arc bottom.Big elbow positioner clamp processes by the following method:

(1) as shown in Figure 4, get the enough big steel plate of odd number piece, equidistant vertical laid parallel is got an O ' on the plate of middle, make OO '=3D ₁, wherein, some O is the center of circle of automatic welding device main shaft, D ₁For the diameter length of the big elbow of minimum process part set, be center of circle 2D with O ' ₁For radius is justified, meet at an O successively with each steel plate ₀₀, O ₀₁, O ₀₂, at the O that crosses of each steel plate ₀₀, O ₀₁, O ₀₂Each makes a horizontal line O ₀₀O ₀₀', O ₀₁O ₀₁', O ₀₂O ₀₂' ..., with each steel plate along horizontal line O ₀₀O ₀₀', O ₀₁O ₀₁', O ₀₂O ₀₂' ... the alignment level is stacked, as shown in Figure 5;

(2) as shown in Figure 6, at above-mentioned stacked steel plate horizontal line O ₀₀O ₀₀', O ₀₁O ₀₁', O ₀₂O ₀₂' ... on get mid point O ₀, cross O ₀Make O ₀₆O ₀₆' vertical line YO ₀, vertical line YO ₀Meet at Y ' point with the base, at YO ₀On get an O ₁, O ₂, make O ₀O ₁=r ₁O ₂O ₀=3r ₂-a, wherein, r ₁Be the radius length of the big elbow of minimum process part set, r ₂Be the radius length of the big elbow of maximum workpiece set, a is the distance that spindle axis arrives dull and stereotyped upper surface;

As shown in Figure 1, the center circle camber line QQ ' of big elbow is positioned at the position of center line of big elbow place annulus, the inventor finds, as long as guaranteeing the cross-section center Q or the Q ' of big elbow rotates around main shaft, can guarantee that the solder joint on longitudinal concave weld seam BB ' arc, the DD ' arc forms a locus circle, thereby longitudinal concave weld seam solder joint track has been become circular arc,, can realize the automatic welding of longitudinal concave weld seam as long as welding head is also moved at the uniform velocity along this locus circle and solder joint.The track diameter of a circle of the said outer concave weld of inventor is 6 times of big elbow caliber, all size elbow locus circle decentraction, but on same straight line, the power set alignment of shafts equates with caliber to the distance in the outer concave weld solder joint locus circle center of circle; The track diameter of a circle of concave shaped weld seam also is 6 times of big elbow caliber, all size elbow locus circle decentraction, but on same straight line, different is that the power set alignment of shafts is the twice of workpiece caliber to the distance in the concave shaped weld seam solder joint locus circle center of circle.

(3) respectively with O ₁Be the center of circle, r ₁Be radius, O ₂Be the center of circle, r ₂Be radius, make two circles, be their outside common tangent HI, be its outside common tangent H ' I ', respectively with circle O on the right side of two circles in the left side of two circles ₁Meet at H, H ' point, with O ₂Meet at I, I ' point;

(4) cross O ₂Be YO ₀Vertical line JJ ', with the circle O ₂Meet at J, J ', cross vertical line JK, J ' K ' that J, J ' point is JJ ' respectively, make JK=J ' K ', get JK, the suitable height of J ' K ';

(5) connect K, K ' and prolongation, get a L, L ' respectively, make LK=K ' L ', get LK, the suitable length of K ' L ' in K, K ' the some outside;

(6) in the both sides of base Y ', get a M, some M ', make Y ' M=Y ' M ', get Y ' M, the suitable length of Y ' M ';

(7) downcut in turn along above-mentioned line segment and circular arc line, cut out by M, L, K, J, I, H, H ', I ', J ', K ', L ', M ', M point form about polygon clamp to becoming, wherein HH ' is roundlet O ₁Circular arc, JI and I ' J ' be great circle O ₂Circular arc;

Also can after step (7), proceed following steps:

(8) on circular arc HH ', at O ₁Open a sulculus NPP ' N ' under the point, be used for outside big elbow longitudinal joint, installing liner additional, prevent burn-through, perhaps implement the back-welding shape weldering;

(9) line segment that marks along above-mentioned steps downcuts in turn, cuts out the symmetrical polygon clamp of being made up of M, L, K, J, I, H, N, P, P ', N ', H ', I ', J ', K ', L ', M ', M point.

7 clamps that said method is made are equidistantly arranged on the flat board that is welded on the main shaft according to order shown in Figure 4.

The positioner of making by this method has the function of self-centering and automatic centering weld seam.So-called self-centering is meant when snapping fitted to big elbow on three above clamps, guarantee that its cross-section center line is being on the circle in the center of circle with the alignment of shafts, solder joint path circumscribed when navigation system is rotated on the longitudinal concave weld seam forms locus circle, is convenient to operate head and welds.So-called automatic centering weld seam is meant when snapping fitted to big elbow on three above clamps, because three clamps contact with big elbow in a logical arc position, 3 of contact on same each circular arc line, determine a face according to 3 on same straight line not, the position, back keeps motionless so the big elbow of work piece is stuck, weld seam has guaranteed the automatic centering of weld seam just in the middle.

The big elbow of workpiece is snapped in locating clamp plate, big elbow point is welded on the clamp after the assist location, workpiece can firmly be fixed, and regrinds out after finishing welding.

Start automatic welding device, main shaft rotates, and big elbow locating clamp plate rotates, and the longitudinal concave weld seam solder joint of big elbow is around its locus circle motion, thereby concave weld has been become the circular arc weld seam, welding machine has been rotated in synchronously the automatic welding that can realize concave weld on the weld seam.

Claims (5)

1, big elbow positioner, it is characterized in that, comprise base plate and some clamps, clamp is fixedlyed connected with base plate, clamp comprises bottom, left wing, right flank, integral body is in the shape of the letter V, left wing and right flank symmetry, and the inboard circle of stipulating between the symmetric points arbitrarily of clamp both wings overlaps with the cross section that is installed in this big elbow of 2.

2, big elbow positioner as claimed in claim 1 is characterized in that, clamp left wing and right flank are from up comprising tangent plane, orthodrome and the stopper of little circular arc, two circles successively near the bottom.

3, big elbow positioner as claimed in claim 2 is characterized in that, a groove is arranged at clamp roundlet arc bottom.

4, the processing method of the clamp of the described big elbow positioner of production claim 1 is characterized in that, comprises the steps:

(1) as shown in Figure 4, get the enough big steel plate of odd number piece, equidistant vertical laid parallel is got an O ' on the plate of middle, make OO '=3D ₁, wherein, some O is the center of circle of automatic welding device main shaft, D ₁For the diameter length of the big elbow of minimum process part set, be center of circle 2D with O ' ₁For radius is justified, meet at an O successively with each steel plate ₀₀, O ₀₁, O ₀₂, at the O that crosses of each steel plate ₀₀, O ₀₁, O ₀₂Each makes a horizontal line O ₀₀O ₀₀', O ₀₁O ₀₁', O ₀₂O ₀₂' ..., with each steel plate along horizontal line O ₀₀O ₀₀', O ₀₁O ₀₁', O ₀₂O ₀₂' ... the alignment level is stacked, as shown in Figure 5;

(2) as shown in Figure 6, at above-mentioned stacked steel plate horizontal line O ₀₀O ₀₀', O ₀₁O ₀₁', O ₀₂O ₀₂' ... on get mid point O ₀, cross O ₀Make O ₀₆O ₀₆' vertical line YO ₀, vertical line YO ₀Meet at Y ' point with the base, at YO ₀On get an O ₁, O ₂, make O ₀O ₁=r ₁O ₂O ₀=3r ₂-a, wherein, r ₁Be the radius length of the big elbow of minimum process part set, r ₂Be the radius length of the big elbow of maximum workpiece set, a is the distance that spindle axis arrives dull and stereotyped upper surface;

(3) respectively with O ₁Be the center of circle, r ₁Be radius, O ₂Be the center of circle, r ₂Be radius, make two circles, be their outside common tangent HI, be its outside common tangent H ' I ', respectively with circle O on the right side of two circles in the left side of two circles ₁Meet at H, H ' point, with O ₂Meet at I, I ' point;

(4) cross O ₂Be Y O ₀Vertical line JJ ', with the circle O ₂Meet at J, J ', cross vertical line JK, J ' K ' that J, J ' point is JJ ' respectively, make JK=J ' K ', get JK, the suitable height of J ' K ';

(5) connect K, K ' and prolongation, get a L, L ' respectively, make LK=K ' L ', get LK, the suitable length of K ' L ' in K, K ' the some outside;

(6) in the both sides of base Y ', get a M, some M ', make Y ' M=Y ' M ', get Y ' M, the suitable length of Y ' M ';

(7) downcut in turn along above-mentioned line segment and circular arc line, cut out by M, L, K, J, I, H, H ', I ', J ', K ', L ', M ', M point form about polygon clamp to becoming, wherein HH ' is roundlet O ₁Circular arc, JI and I ' J ' be great circle O ₂Circular arc.

5, equipment for automatically welding longitudinal concave seam of large elbow as claimed in claim 4 is characterized in that, increases following steps in step (7) back:

(8) on circular arc HH ', at O ₁Open a sulculus NPP ' N ' under the point;

(9) line segment that marks along above-mentioned steps downcuts in turn, cuts out the symmetrical polygon clamp of being made up of M, L, K, J, I, H, N, P, P ', N ', H ', I ', J ', K ', L ', M ', M point.

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