JPH01309784A - Equipment and method for internal surface automatic cladding by welding for tapered nozzle - Google Patents

Abstract

PURPOSE:To automate cladding by welding of the internal surface of a tapered nozzle by a relatively simple mechanism by providing a control means to move a welding torch automatically along the internal surface of the tapered nozzle. CONSTITUTION:A radius R0, a base end virtual radius r0, a 1/2 cone angle alpha, a base cornering part radius rho0 and a distance DELTAH are inputted manually to a computer 17. Continuously, when a turning angle theta of a turntable 6 and a variation step DELTAr or the welding torch 15 are inputted from a setter 16, the computer 17 calculates a tilt angle delta of a tilt supporting base 2. Further, horizontal coordinates x and vertical coordinates y are calculated by the computer 17 and welding possible conditions are calculated by the computer 17. By this method, accurate welding can be performed automatically by an orthogonal arc to the surface of a welding place.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic overlay welding device for the inner surface of a tapered nozzle and a welding method therefor.

[Conventional technology]

Conventionally, for example, as shown in the vertical sectional view of FIG. 7 and the horizontal sectional view of FIG.
22 is a base end virtual radius smaller than the radius R of the side wall hole 021, a taper angle 2α, and a base end cornering radius ρ0.
Since the joint part with the cylindrical container 020 has a three-dimensional and complicated curved surface, it is difficult to automate the build-up work on the inner surface, so manual welding has conventionally been used.

However, such devices and welding methods have the disadvantage that they require a great deal of time and effort, and also increase processing costs.

[Problem to be solved by the invention]

The present invention was proposed in view of these circumstances, and
The purpose of the present invention is to provide an automatic overlay welding device for the inner surface of a tapered nozzle and a welding method thereof, which can widely introduce automatic welding, save manpower, and are highly efficient.

[Means for Solving the Problems] To this end, the present invention provides a device for welding the inner surface of a tapered nozzle that protrudes into a side wall hole of a cylindrical container. a turntable that is pivotally connected to the tilting table via a vertical pin and can be rotated via a rotation motor; a jig for fixing a taper nozzle fixed to the turntable on the same axis; a dolly that is attached to the lifting platform and can be moved back and forth via a moving motor; a welding torch that protrudes downward from the dolly and connects to the overlay material supply pipe;
The welding torch is characterized by comprising a control means for automatically moving the welding torch along the inner surface of the tapered nozzle.

Further, the method of the present invention controls the inner surface build-up welding device of a tapered nozzle described in item (1) above, which has a base end virtual radius, a taper angle, and a base cornering radius that protrude into a side wall hole of a cylindrical container. When determining, the cylindrical vessel radius, proximal virtual radius, taper angle, and proximal cornering radius.

The first step is to manually input the distance between the virtual tip of the tapered nozzle and the horizontal pin into the computer, the second step is to calculate the inclination angle δ of the tilting support using the computer, and the distance from the horizontal pin to the welding point is calculated using the computer. A third step of calculating the horizontal distance χ and the vertical distance y from the intersection of the radius of the cylindrical container and the axis of the tapered nozzle in the vertical state to the welding point using the computer, and calculating the conditions for welding using the computer. and a fourth step of performing overlay welding.

[For production]

With the above configuration, automatic welding can be widely introduced, and it is possible to obtain a manpower-saving, labor-saving, and highly efficient automatic overlay welding device for the inner surface of a tapered nozzle, and a welding method thereof.

〔Example〕

An embodiment of the present invention will be explained with reference to the drawings. FIG. 1 is an overall control system diagram thereof, and FIG. 2 is a diagram.

Figures 3, 4, and 5 are partial plan views showing the surface shape of the taper nozzle shown in Figure 1, which is the basis for numerical analysis of the automatic overlay welding work on the inner surface, and III in Figure 2, respectively.
-I[1]; Partial longitudinal sectional view taken along IV-IV in Fig. 2; Partial longitudinal sectional view taken along v-■ in Fig. 2; Fig. 6 shows the taper of the tapered nozzle. It is a partial longitudinal cross-sectional view which shows a part of internal surface automatic build-up procedure.

In the above figure, the same reference numerals as in Figs. 7 and 8 indicate the same members as in the same figure. First, in Fig. 1, 1 is a bearing installed upright on the base plate GL, and 2 is a bearing supported by a horizontal pin 3. Bearing 1
The electric motor 4 is fixed on the base plate GL when it is pivoted to the
A tilting support is tilted at an inclination angle δ by a rotating belt 5, and a turntable 6 is pivotally connected to the tilting support 2 via a vertical pin 6a, which is carved on the outer periphery. It is rotated by an electric motor 9 fixed to the end of the tilting support base 2 via a pinion 8 meshing with the gear 7 . 9a is attached to the electric motor 9 and indicates the rotation angle θ of the turntable 6 (not shown)
The transmitting mechanism 10 is a jig fixed to the turntable 6 and capable of fixing the tapered nozzle 022.

11 is a vertical threaded rod that can be rotated by an electric motor 12 when set on a base; 13 is a lifting table that is screwed onto the vertical screw rod 11 and can be raised and lowered; 14 is placed on the lifting table 13 and can be moved forward and backward. It is a traveling trolley that can move in the direction, has a downward L-shaped welding torch 15 protruding from its front end, and is connected to its rear end (and a build-up material supply pipe 15b in which a switching valve 15a is not inserted).

16 is the torch radius r from the axis of the tapered nozzle 022
A setting device outputs a step change command by inputting the integrated value of the change step Δr and the rotation angle θ of the turntable 6, 17 is a radius Ro + base end virtual radius r01
−Aper angle α.

Proximal cornering radius ρ. , the distance between the virtual center of the taper nozzle and the horizontal pin 3 is input in advance, and when the torch radius r9 and the rotation angle θ are input, the horizontal coordinate χ from the pin 3 to the welding point, and the horizontal coordinate χ from the reference point to the welding point are immediately input. A computer that outputs the vertical coordinate y up to 18 is a computer 17
In response to the input from This is a command device that issues various outputs and welding work commands.

In such an apparatus, as shown in FIG. 1, the taper nozzle 022 is first fixed and positioned on the jig 10 in a vertical position (see the solid line in FIG. 7). At this time, the coordinates of the welding location of the tapered nozzle 022 are horizontal coordinate χ = r, vertical coordinate y = o, and the vertical clearance between the welding location and welding torch 15 is a.Subsequently, radius Ro + base end virtual radius ro, The change step Δr of the torch radius r,
Data is input to the setting device 16 so that a step change can be commanded according to the integrated value of the rotation angle θ of the turntable 6. At this time, the horizontal coordinate χ=r is set to the radius Ro, which is the outermost edge. The torch radius r is set so that it can be moved inward by a change step Δr.

Then, when welding work using the welding torch 15 starts, the electric motor 9 is rotated to rotate the taper nozzle 022,
The rotation angle θ is transmitted by the transmitting mechanism 9a and setter 16
When inputted to the computer 17 via the , the inclination angle δ, horizontal coordinate
The posture of the tilting support base 2, the position of the traveling trolley 14 and the lifting platform 13 are adjusted respectively, and the welding torch 15 is adjusted to the horizontal coordinate χ.
, set to the set point of vertical coordinate y plus vertical clearance a.

Further, the torch radius r gradually becomes smaller, and when a part of its circumference finally reaches the cornering part 023 of the tapered nozzle 022, the supply valve 15a is closed by a command from the command unit 18, and the work of the welding torch 15 is interrupted. When the torch radius r passes through the cornering portion 023 of the tapered nozzle 022, the welding torch 15 resumes its operation.

Next, the control method of the above-mentioned automatic overlay welding device for the inner surface of a taper nozzle will be explained with reference to FIG.
Lower par angle α.

Base cornering radius ρ. , distance are manually input, and then, as a second step, when the rotation angle θ of the turntable 6 and the change step Δr of the welding torch 15 are input from the setting device 16, the computer 17 moves to the tilting support base. 2, and as a third step, calculate the horizontal coordinate χ = (--1 ΔHH1) sin δ + r cos
δ.

tanα Vertical coordinate y:= hcosδ−rsinδ−ra−m
)(1-cosJ).

Tazoshi Ro2= r 2sin 2θ+(Ro-h)
2 is calculated by the computer 17, and then, as a fourth step, 1-μ−β μ=tanα is calculated by the computer 17.

Below, we mainly explain the basics of numerical analysis using the above control method.
To explain Figures 5 to 5, (1) Inner surface positional relationship of the cylindrical container 020 “2Sln2θ+(Ro −h) 2=
R♂ That is, 2Roh=r2S1n2θ+h2...
・・・・・・・・・・・・・・・(1)(2) Weldable range If the radius of the line of intersection between the cylindrical container 020 and the tapered nozzle 022 is r', it would be confusing m=-9μ= tan α r.

If the radial increment of the portion occupied by the cornering is Δ2, that is, if the torch radius r becomes less than r'+Δr2, it means that the welding torch 15 has touched the cornering part 023, and in that case, The welding stop signal commands welding interruption.

Therefore, the weldable range is: (3) The position of the welding torch 15, which is indicated using coordinate transformation r, θ, and h, is shifted by an inclination angle δ from the axis as shown in FIG. When it is fixed to the inclined jig 10, its horizontal coordinate χ and vertical coordinate y are as follows.

χ = (Ruken - 8H + h) sin δ ten f COS δ...
(4) Y = h cos δ - distance δ - 1 or 1 Δ old (1 - cos δ) (5) The position of the welding torch 15 is based on this χ and y + a. Must be in position.

(4) Posture of the welding torch 15 The inclination of the welding point is related to the plane seen in FIG. 1, but with the inclination angle δ constant, dy=Q is a condition in which the welding torch 15 is perpendicular to the welding surface, Differentiating equation (5) yields the following relationship: dy=cosδdh−sinδdr=0, dh=
= tanδ・・・・・・・・・・・・・・・
・(6)'dr Also, when the torch radius r is specified, the turntable °
This is the inclination angle δ for inclining the tilting support base 2 according to the rotation angle θ of 6.

The above calculation is based on radius Ro + basal end virtual radius r. .

Proximal cornering 8 radius ρ. , 7Aper angle α of the tapered nozzle 022 and the distance determined by the attachment of the jig 10 are entered in advance to specify the torch radius r and obtain information on the rotation angle θ of the turntable 6. For example, the computer 17 performs quick calculations, obtains signals for the inclination angle δ, horizontal coordinate χ, and vertical coordinate y, and automatically performs welding with an arc that is positionally accurate and perpendicular to the surface of the welding area. It shows.

Incidentally, for overlay welding of a part of the taper of the taper nozzle 022, as shown in FIG. Welding can be stopped at a position calculated from the reference point using the following formula.

Regarding the cornering portion 023, manual welding is performed because it is difficult to follow the welding torch 15 and the welding area thereof is small compared to the whole.

According to such a device and method, automatic welding can be widely introduced, so the automatic overlay welding work on the inner surface of the tapered nozzle can be performed labor-savingly, and it is possible to significantly reduce the amount of artificial bone. .

〔Effect of the invention〕

In short, according to the device of the present invention, in an internal build-up welding device for a tapered nozzle protruding from a side wall hole of a cylindrical container, there is a tilting table that can be tilted around a horizontal pin by a tilting motor, and a tilting table that is perpendicular to the tilting table. A turntable that is pivotally connected via a pin and can be rotated via a rotation motor, a jig that fixes the taper nozzle fixed to the turntable on the same axis, and a lifting platform that can be moved up and down. a dolly that can be moved back and forth via a motor; a welding torch that protrudes downward from the dolly and connects to the overlay material supply pipe; and a control that automatically moves the welding torch along the inner surface of the tapered nozzle. By providing means, an automatic overlay welding device for an inner surface of a taper nozzle is provided which automates overlay welding of the inner surface of a taper nozzle having a complicated surface shape with a relatively simple mechanism.

Further, according to the method of the present invention, the inner surface build-up welding device for a tapered nozzle described in item (1) above, which has a base end virtual radius, a taper angle, and a base cornering radius protruding from a side wall hole of a cylindrical container. When controlling the radius of the cylindrical container,
Base virtual radius, taper angle, base cornering radius,
The first step is to manually input the distance between the virtual tip of the tapered nozzle and the horizontal pin into the computer, the second step is to calculate the inclination angle δ of the tilting support using the computer, and the distance from the horizontal pin to the welding point is calculated using the computer. A third step of calculating the horizontal distance χ and the vertical distance y from the intersection of the radius of the cylindrical container and the axis of the tapered nozzle in the vertical state to the welding point using the computer, and calculating the conditions for welding using the computer. Automatic welding of the inner surface of a taper nozzle, which automates the build-up welding of the inner surface of a tapered nozzle with a complex surface shape to a large extent without sacrificing its accuracy. Obtain the welding method for the fill welding device.

[Brief explanation of the drawing]

FIG. 1 is an overall control system diagram showing one embodiment of the present invention, and FIG.
Figures 3, 4, and 5 are partial plan views showing the surface shape of the tapered nozzle shown in Figure 1, which are the basis for numerically analyzing the internal automatic overlay welding work, and Figure 2, respectively. I
[[-Partial longitudinal sectional view along III, IV-■ in Fig. 2
FIG. 6 is a partial longitudinal sectional view taken along line v--2 in FIG. 2, and FIG. FIGS. 7 and 8 are longitudinal cross-sectional views showing known taper nozzles, respectively. 1. Bearing, 2. Tilting support, 3. Horizontal pin, 4.
・Electric motor, 5...Belt, 6...Turntable, 6a
・Vertical pin, 7. Gear, 8. Small gear, 9. Electric motor, 9a. Oscillation mechanism, 1o. Jig, 11. Vertical screw, 12. Electric motor, 13. Lifting platform. , 14... Running゛
Trolley, 15...Welding torch, 15a...Switching valve, 15b
... Overlay material supply pipe, 16.. Setting device, 17.. Computer, 18.. Command device, 020.. Cylindrical container, 021.. Side hole, 022..
Tapered nozzle, 023...Cornering part, a...
Vertical clearance, GL...base, Ro...radius, r...
-Torch radius, r'...Radius of intersection line, r.・・Basal end virtual radius, X・・Direction, χ・・Horizontal coordinate, y・
・Vertical coordinate, 2α...Taper angle, Armpit...Distance, △r...Change step, Δr2...Radial direction increment, δ...Inclination angle, θ...
Rotation angle, ρ. ...Proximal cornering radius agent Patent attorney Masaru Tsukamoto Figure 1/8 (QNt”)] EJg
? Figure 3 Figure 5 Figure 6 Figure 7 Figure B

Claims (2)

[Claims] (1) In an internal build-up welding device for a taper nozzle protruding from a side wall hole of a cylindrical container, there is a tilting table that can be tilted by a tilting motor around a horizontal pin, and a pivot plate is attached to the tilting table via a vertical pin. A turntable that is attached to the table and can be rotated via a rotation motor, a jig that fixes the taper nozzle fixed to the turntable on the same axis, and a jig that is attached to a lifting platform that can be raised and lowered and that can be rotated via a movement motor. A dolly that is movable back and forth, a welding torch that projects downward from the dolly and connects to the overlay material supply pipe, and a control means that automatically moves the welding torch along the inner surface of the tapered nozzle. An automatic overlay welding device for the inner surface of a tapered nozzle, which is characterized by: (2) The above-mentioned (
When controlling the taper nozzle inner surface welding device described in section 1), manually calculate the cylindrical container radius, base end virtual radius, taper angle, base cornering radius, and the distance between the tapered nozzle virtual tip and the horizontal pin. The first step is to input the information into the machine, the second step is to calculate the inclination angle δ of the tilting support using the computer, and the horizontal distance x from the horizontal pin to the welding point, the radius of the cylindrical container, and the above in the vertical state. It consists of a third step of calculating the vertical distance y from the point of intersection with the axis of the tapered nozzle to the welding point using the computer, and a fourth step of calculating welding conditions using the computer and performing build-up welding. An automatic overlay welding method for the inner surface of a tapered nozzle, which is characterized by: