JP3528746B2 - Welding method and manufacturing method of combination member and manufacturing method of valve structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to welding of various combined members, such as a valve structure of a fuel injection system, which is composed of a hollow member and an insertion member inserted and joined to the hollow member, and which requires a certain degree of coaxiality. Regarding the method.

[0002]

2. Description of the Related Art An example of a valve structure of a fuel injection system in an internal combustion engine will be given. As shown in FIGS. 1 (a) and 1 (b) described later, the valve structure 3 has a bottomed cylindrical hollow member 11
A holder, a cylindrical body 315 inserted and stored in the hollow member 11, and an insertion member 12 inserted in the hollow member 11. Then, the overlapping portion 13 where the hollow member 11 and the insertion member 12 overlap, and the overlapping portion 33 where the hollow member 11 and the body 315 overlap.
1 is welded all around.

[0003]

However, since thermal strain is generated during the entire circumference welding, the hollow member 11 and the insertion member 12 are
Even if they are assembled so that their central axes G1 and G2 are aligned with each other, there is a problem that the central axes G1 and G2 are not aligned with each other in the subsequent full-circumferential welding, as shown in FIGS. It was Hereinafter, the state where the central axes G1 and G2 are correctly aligned will be described as excellent in coaxiality, and the state where the central axes G1 and G2 are not aligned will be described as poor coaxiality.

The present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a welding method of a combined member having excellent coaxiality.

[0005]

According to a first aspect of the present invention, a hollow member and an insertion member are prepared, and when the insertion member is inserted into the hollow member, the hollow member and the insertion member are joined together to form a combination member. By providing a partial welding part for the overlapping portion where the member and the insertion member overlap, a correction welding step for correcting the coaxiality of the combination member is provided , and the entire periphery of the overlapping portion is provided . the above
The main welding process of welding the hollow member and the above-mentioned insertion member all around
The correction welding process and the main welding process are performed at the same time.
It is a welding method of a combination member characterized by being curved .

What is most noticeable in the present invention is to provide a correction welding step for correcting the coaxiality of the above-mentioned combined member by providing a partial welded portion to the overlapping portion.

Next, the operation of the present invention will be described. Since the contraction stress is generated by providing the partial welded portion, the inclination toward the position where the partial welded portion is provided is generated in the inserted member with the hollow member as a reference. Therefore, the tilting direction of the insertion member can be adjusted by appropriately controlling the position at which the partial welded portion is provided. Further, the angle of inclination, the size of inclination, and the like can be adjusted by appropriately controlling the size and length of the partial welded portion.

Therefore, the combination member is originally inclinedly joined to the hollow member, and the central axis of the hollow member and the central axis of the insertion member are not aligned (low coaxiality) (see FIGS. 5, 6 which will be described later). It is possible to obtain a combination member having excellent coaxiality, in which the central axes of the hollow member and the insertion member are aligned, by correcting the coaxiality of (see).

As described above, according to the present invention, it is possible to provide a welding method of a combined member having excellent coaxiality.

The partially welded portion in the present invention is preferably provided by welding using a high energy beam. As a result, the partial welded portion can be surely provided at the aimed position, so that the coaxiality can be corrected with high accuracy. A laser can be used as the high energy beam.

When the coaxiality is corrected by providing one partial welded portion, as shown in FIG. 6, the insertion member 12 is used.
It is preferable that a straight line L extending from the central axis G2 to the central axis G1 of the hollow member 11 is extended to the outer periphery of the hollow member 11 and a partial weld portion is provided at a position SA where the two intersect.
The reference numeral 260 in the figure is a laser beam used for laser welding. It is also possible to correct the coaxiality by providing a plurality of partial welds.

The partially welded portion can be provided in a dot shape as shown in FIG. 7 (a) which will be described later, but as shown in FIG. 7 (b) which will be described later, a line having a certain extent in the circumferential direction. It can also be provided in a shape. Further, the welding range, position, and size (area, length, etc.) of these partial welds can be set arbitrarily.

Next, as in the invention described in claim 2, it is preferable that the hollow member and the insertion member are joined by the partial welded portion provided in the correction welding step. Therefore, for welding that does not require airtightness,
Quality can be secured with the minimum required welding, and welding time can be shortened.

The present invention, along the entire circumference of the upper SL overlapping portions, Ru includes a main welding process for circumferential welding and the hollow member and the insertion member. This makes it possible to obtain a combination member in which the hollow member and the insertion member are firmly joined and the overlapping portion is excellent in airtightness. Further, the above-mentioned partial welded portion may be provided at the same place as the entire circumference welded portion applied in the main welding process. It can also be installed in a different place.

[0015] The present invention will row simultaneously the upper Symbol correcting the welding process and the present welding process. This can shorten the time of the welding process.

Next, as in the invention described in claim 3 , a measuring step for measuring the deviation amount and the deviation direction of the coaxiality of the combination member is performed every time the correction welding step is performed, and the deviation amount of the coaxiality is performed. It is preferable to continue the correction welding process until the deviation direction falls within a desired range.

Thus, the correction welding process and the measurement process can be alternately performed, and the correction welding process can be performed until a desired length is obtained. Therefore, it is possible to grasp the shift amount of the coaxiality while welding and surely correct the shift amount of the coaxiality and the shift direction so as to be within a desired range. As a result, variation can be reduced and a combination member with high dimensional accuracy can be manufactured. The measurement welding process may not be performed as an independent process, but the correction welding process may be performed simultaneously while measuring the coaxiality in real time.

Next, as in the invention described in claim 4 , a melting amount determining step is performed before the correction welding step,
The correction welding process is performed according to the melting amount determined in the melting amount determining process, and the melting amount determining process includes basic data collected in advance according to the shift amount and the shift direction of the coaxiality of the combination member before the correction welding. It is preferable that the step is a step of determining the melting amount more.

With this, the amount of melting can be determined by using the algorithm obtained from the basic data, so that the welding time can be shortened accurately and the productivity can be improved. It should be noted that the determination of the melting amount is performed by appropriately combining the sizes of the partial welds, the number of the partial welds,
The choice is to select the partial weld that gives the desired coaxiality.

Next, in the invention described in claim 5 , the hollow member and the insertion member are prepared, and the hollow member and the insertion member are joined to each other in a state where the insertion member is inserted into the combination member to form a combination member. The insertion member is inserted into the member, and a measurement step of measuring the deviation direction of the coaxiality between the two is performed, and then the coaxiality is measured over the entire circumference of the overlapping portion where the hollow member and the insertion member overlap. A welding method for a combined member is characterized in that a welding start portion is located at a position opposite to the displacement direction, and both are welded around the entire circumference.

Since shrinkage stress is generated at the welding start portion in the entire circumference welding, an inclination toward the welding start portion is generated in the insertion member. Therefore, the deviation direction of the coaxiality is measured in advance, and the welding start portion is brought to a position where the deviation can be corrected during the entire circumference welding. This makes it possible to correct the coaxiality by adjusting the tilting direction of the insertion member, the tilting angle, and the like. Further, since the coaxiality can be corrected together when the hollow member and the insertion member are joined, the welding process can be simplified. Also, the welding time can be shortened.

As described above, according to the present invention, it is possible to provide a welding method for a combined member having excellent coaxiality.

Next, as in the invention described in claim 6 , the deviation amount of the coaxiality is measured in the measuring step, and the welding overlap length after the entire circumference welding is changed according to the deviation amount. It is preferable to set the position of the welding end portion so that Since the coaxiality correction can be controlled according to the overlap length, the coaxiality can be corrected with higher accuracy. The welding overlap length means that the welding that started from the welding start portion in the entire circumference welding goes around the overlapping portion of the combination member and returns to the welding start portion, and further welding is performed beyond the welding start portion. ， Indicates the double welded part.

Next, in the invention according to claim 7 , the hollow member and the insertion member are prepared, and when the insertion member is inserted into the hollow member and the two members are joined to form a combination member, the hollow member On the other hand, the above-mentioned insertion member is inserted, and a measuring step for measuring the deviation direction and the deviation amount of the coaxiality of both is performed. If the deviation amount of the coaxiality measured in the measuring step is within the allowable range, With respect to the entire circumference of the overlapping portion where the hollow member and the insertion member overlap, a plurality of welding heads placed at axially symmetrical positions are rotated relative to the entire circumference of the overlapping portion, and A welding method for a combined member is characterized in that the entire circumference of the mating portion is welded.

With this, it is possible to perform the entire circumference welding by using the plurality of welding heads so that the welding start portion and the end portion are evenly formed in the circumferential direction. For this reason, it is possible to perform full-circumferential welding so that the initially high coaxiality is maintained.

As described above, according to the present invention, it is possible to provide a welding method of a combined member having excellent coaxiality.

Next, when the amount of deviation of the coaxiality measured in the measuring step is outside the permissible range as in the eighth aspect of the invention, after performing the entire circumference welding on the overlapping portion, Furthermore, at the position opposite to the above-mentioned deviation direction,
It is preferable to perform a correction welding process for correcting the coaxiality of the combination member by partially providing a partial welded portion with respect to the overlapping portion.

Since shrinkage stress is generated at the welding start portion in the entire circumference welding, an inclination toward the welding start portion is generated in the insertion member. Therefore, the deviation direction of the coaxiality is measured in advance, and the welding start portion is brought to a position where the deviation can be corrected during the entire circumference welding. This makes it possible to correct the coaxiality by adjusting the tilting direction of the insertion member, the tilting angle, and the like.

Next, as in the ninth aspect of the present invention, it is preferable that the melting amount at the time of providing the partial welded portion is changed according to the shift amount of the coaxiality measured in the measuring step. As a result, the coaxiality can be corrected with high accuracy.

Next, when the shift amount of the coaxiality measured in the measuring step is outside the allowable range as in the tenth aspect of the invention, the position opposite to the shift direction of the coaxiality is welded. As the starting portion, it is preferable to weld the entire circumference of the overlapping portion using one welding head. As a result, the welding start portion is brought to a position where the deviation can be corrected during the entire circumference welding, so that the entire circumference welding can be executed while correcting the coaxiality. In this case, since the coaxiality can be corrected together when the hollow member and the insertion member are joined together, the welding process can be simplified. Also, the welding time can be shortened.

Next, as in the invention described in claim 11 , the deviation amount of the coaxiality is measured in the measuring step, and the welding overlap length after the full circumference welding is changed according to the deviation amount. Thus, it is preferable to set the position of the welding end portion. Since the coaxiality correction can be controlled according to the overlap length, the coaxiality can be corrected with higher accuracy.

Next, according to the invention of claim 12 ,
It is preferable that the insertion member is temporarily fixed to the hollow member by press fitting. As a result, the action stress can be received not only in the welded portion but also in the press-fitted portion, so that the stress on the welded portion can be relaxed, and not only the initial quality but also the durability quality Can be improved and the service life can be extended. Next
In addition, the invention of claim 13 is any one of claims 1 to 12.
Using the welding method for combined members
There is a manufacturing method of the mating member. Next, the invention of claim 14
Is a combination according to any one of claims 1 to 12.
For the manufacturing method of the valve structure using the welding method of the members
It Next, the invention of claim 15 provides a hollow member and an insertion member.
With the insertion member inserted in the hollow member
When joining the two to form a combined member,
Overlapping portion where the hollow member and the insertion member overlap
Of the hollow member and the insertion member over the entire circumference of
The main welding process of welding is performed, and then the above hollow member and
Partial to the overlapping part where the insertion member overlaps
By providing a partial weld on the
It is characterized by performing a correction welding process to correct the coaxiality of
Welding method for combined members. Next, the above partial melting
The contact area is different from the full-circle welded area applied in the main welding process
It is preferably provided at a location (claim 16). Next
Between the main welding process and the correction welding process.
Measures the deviation direction of the coaxiality between the hollow member and the insertion member
It is preferable to perform the measurement step (claim 17). Next
, The partial welding portion is provided in the correction welding step.
The position is the direction of deviation of the coaxiality obtained in the above measurement process.
It is preferably determined according to (claim 18). Next
Each time the correction welding process is performed,
Perform the measurement process to measure the deviation amount and deviation direction of the axial degree,
Increase until the deviation amount and direction of coaxiality are within the desired range.
It is preferable to continue the correction welding step (claim 1
9). Next, determine the melting amount before performing the above-mentioned correction welding process.
Perform the process and follow the melting amount determined in the melting amount determination process.
Perform the above-mentioned correction welding process and determine the above-mentioned melting amount
The process is the amount of deviation of the coaxiality before correction welding of the combined members and
Partial melting from basic data collected in advance according to the direction of displacement
It is preferable that the process is to determine the contact formation position and the melting amount.
Good (Claim 20). Next, perform the correction welding process described above.
Direction of deviation of coaxiality before correction welding of combined members
Depending on the
It is preferably provided (Claim 21). Next, claim 2
The invention of 2 relates to any one of claims 15 to 21.
Of the combination member using the welding method of the combination member
There is a manufacturing method. Next, the invention of claim 23 is the same as claim 1
Welding of combination members according to any one of 5 to 21
There is a method of manufacturing a valve structure using the method.

[0033]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1 A welding process according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 and 2, the hollow member 11 and the insertion member 12 are prepared, and the hollow member 11
In joining the two with the insertion member 12 inserted thereinto to form the combined member 1, a partial welded portion 14 to be a partial welded portion is formed on the overlapping portion 13 where the hollow member 11 and the insertable member 12 overlap. By providing, a correction welding process for correcting the coaxiality of the combination member 1 is provided.

The combination member 1 according to this example will be described. The combination member 1 is applied to a valve structure 3 of a fuel injection system in an automobile engine. As shown in FIGS. 1 (a) and 1 (b), this valve structure 3 is
It has a holder that is a hollow member 11 and a pipe that is an insertion member 12 inserted into the holder. The holder has a bottomed cylindrical shape, and a cylindrical body 315 is inserted and stored in the holder.

The lap portion 331 where the holder and the body 315 overlap each other and the overlap portion 13 where the holder and the pipe overlap each other are welded all around. Reference numerals 140 and 340 are the entire circumference welded portions. Then, as shown in FIG. 2, the partial welded portion 14 is provided so as to overlap the entire circumference welded portion 140. The maximum outer diameter of the holder is 18 mm, the outer diameter of the body 315 is 8 mm, and the outer diameter of the pipe is 11 mm.

Next, a method of manufacturing a fuel injection valve structure using the welding method of this embodiment will be described in detail. Figure 1
As shown in FIG. 5, each component is prepared, the body 315 and the pipe as the insertion member 12 are press-fitted into the hollow member 11 as the holder, and the overlapping portions 13, 331 are welded all around. Also, the laser output is 300 for all-around welding at this time.
W, processing speed 12.5 mm / sec, Ar gas supply amount 20 liter / min, frequency 200 Hz, duty 50%
I did it in. This is the main welding process.

The correction welding process is performed subsequent to the main welding process, and the following melting amount determining process is performed prior to the correction welding process. That is, a test piece of a combined member prepared by performing the same full-circumferential bonding on members of the same shape and material as the holder and pipe of this example is prepared. Spot welding was performed on the test pieces to measure the laser beam intensity and irradiation time required for correction welding, and the relationship between the welding range (angle) in the circumferential direction of the hollow member of the partial weld and the amount of deformation.

The results of this measurement are shown in FIG. The partial weld is formed in the overlapping portion of the combination member, and the hollow member circumferential range of the partial weld is shown as an angle on the horizontal axis of FIG. 9. That is, when the entire circumference of the overlapped portion is welded, the welding range is 360 degrees, and when the partial welded part is formed over the half circumference of the overlapped portion, the welding range is 180 degrees.
It is degree. The amount of deformation on the vertical axis indicates the amount of deformation of the coaxiality of the insertion member with respect to the hollow member toward the middle position of the welding range of the partial welded portion.

As is clear from FIG. 9, when the welding range is increased, the deformation amount of coaxiality increases up to 180 degrees, but when the welding range exceeds 180 degrees, the deformation amount gradually decreases. Go. However, even if all-round welding (when the welding range is 360 degrees) is applied, the amount of material melted at the welding start part and the welding end part is larger than at other parts, so about 10μ
The amount of deformation of m is obtained. The partial weld at this time is
Using the same conditions as the above-mentioned full circumference welding, the welding angle was arbitrarily changed, and the opening / closing time of the shutter of the laser light irradiation part in the welding device was changed.

However, the conditions for forming the partial welds need not be the same as the conditions for the entire circumference welds, and for example, the laser output may be increased or decreased. In this case, since the curve in FIG. 9 moves up and down in parallel, it is possible to study the range of the necessary deformation amount in advance and set the laser output accordingly.

Next, as shown in FIG. 3, using the dial gauge 4, the shift amount of the coaxiality in the combination member 1,
A measurement process for measuring the displacement direction is performed. The shift direction and shift amount of the coaxiality to be measured will be described. 5A is a plan view of the combination member 1, and FIG. 5B is a side view. As shown in FIG. 5A, the central axis G of the hollow member 11
The angle θ1 between the reference line X passing through 1 and the straight line Y extending from G1 to G2 is the deviation direction. Further, as shown in FIG. 5B, the angle formed by the central axis G1 of the hollow member 11 and the central axis G2 of the insertion member 12 is the amount of deviation. In addition, in these figures, the hollow member 11 and the insertion member 12 are simplified and described.

From FIG. 9 and the measured displacement amount and displacement direction,
The position where the partial welded portion 14 necessary to correct the coaxiality is provided, the size of the partial welded portion, and the like are determined. As shown in FIG. 6, the position at which the partial welded portion 14 is provided is defined as a range in which the point SA where the straight line L extending from the line segment from G2 to G1 and the outer circumference of the hollow member 11 intersects with the center thereof. As shown in FIG. 4, a laser beam 260 is applied to this range to provide the partial welded portion 14 capable of obtaining a deformation amount (see FIG. 9) capable of correcting the displacement amount. The reference numeral 263 is a laser head for irradiating the laser light 260 (see FIG. 11 described later).

FIG. 7 shows an example of the shape of the partial welded portion 14 provided at this time. FIG. 7A shows a dot-shaped partial welded portion 14. FIG. 7B shows a linear partial welded portion 14. The shape and the welding range of the partial welded portion 14 are appropriately set according to the corrected amount. After forming the partial welded portion 14 set in this way, the coaxiality is further measured, and when the deviation amount is still large, the correction welding process can be repeated. Particularly, in the case of forming a dot-shaped partial weld to correct the coaxiality, it is possible to perform more accurate correction of the coaxiality by alternately repeating the correction welding and the measurement of the coaxiality. The above is the correction welding process.

Next, the results of measurement for correction of the coaxiality of the combined members welded by the method according to this example are shown in FIG.
, And describes this. FIG. 8 is a plot of the central axes of the insertion members, which are based on the central axis of the hollow member after the entire circumference welding process in five different combination members, is plotted in the same diagram. Each point a marked with a black circle
~ D1 and d2 are the positions of the central axes of the insertion members in each combination member. G1 is the central axis of the hollow member 11. As can be seen from the figure, a has a deviation direction of 145 degrees with respect to the central axis G1 and a deviation amount of 7.5 μm. Each of the other points also has a certain amount of displacement and displacement direction with respect to G1.

A correction welding process was performed by irradiating the overlapping portion of the insertion member having the central axis at the position a and the hollow member with laser light from the direction A. A here
The direction of is the same direction as the straight line that extends the line segment connecting a and G1 as it is to the outer periphery of the combination member. That is, the laser light is applied to the overlapping portion at a position opposite to the direction in which the insertion member is displaced.

As a result of this correction welding process, the central axis of the insertion member located at the position a was moved to the position a '. The displacement direction of a ′ did not change to 145 degrees, but the displacement amount was 5 μm.
And decreased. In addition, by performing the correction welding process for b to d1 and d2 in the same manner, the deviation amount can be reduced.

The operation and effect of this example will be described.
Since the contraction stress is generated by providing the partial weld portion 14, the insertion member 12 is inclined toward the position where the partial weld portion 14 is provided. By performing the correction welding process of providing the partial welded portion 14 based on the basic data determined in advance in the melting amount determination process, the combination member 1 in the state where the central axis G1 and the central axis G2 are not aligned (see FIG. 5) It is possible to obtain the combination member 1 having excellent coaxiality by correcting the coaxiality.

As described above, according to this example, it is possible to provide a welding method for a combined member having excellent coaxiality.

Embodiment 2 A welding method according to this embodiment will be described with reference to FIGS. 10 and 11. As shown in FIG. 11, the welding device 2 used in this example comprises a waveform control device 21, a pulse modulation 22, a power supply 23, and an oscillator 24. The laser light 240 from the oscillator 24 becomes laser light 241 and laser light 242 by the switching mirror 251 and the mirror 252, and is sent to the welding heads 263 and 264 alternately or simultaneously through the optical fibers 261 and 262, respectively.
The combination member 1 is configured to be able to irradiate the laser 260. Further, nozzles 265, 266 for supplying assist gas to the place where welding is performed
Is provided.

The details of the welding method will be described. First,
The inserting member 12 is press-fitted into the hollow member 11, and in this state, the measuring process of measuring the deviation direction and the deviation amount (see FIG. 5) of the coaxiality of the both is performed by using a dial gauge (see FIG. 3). Do it. If the amount of deviation at this time is within the allowable range, as shown in FIG. 10A, the two welding heads 263 and 264 of the welding apparatus 2 are installed at positions facing each other with respect to the combined member, and both of them are installed. The unwelded combination member 1 is arranged in the center. And the combination member 1
The laser beam 260 is irradiated while rotating the welding head relative to the two welding heads 263 and 264. As a result, the entire circumference of the overlapping portion 13 is welded.

When the deviation amount is larger than the allowable range, as shown in FIG.
4, using the whole circumference of the overlapping portion 13,
The two sides are welded all around by using the displacement direction as the welding start portion and the welding end portion.

In the welding method of this embodiment, when the insertion member 12 is press-fitted into the hollow member 11 and the coaxiality is within the allowable range, the welding is started uniformly in the circumferential direction using the two welding heads 263 and 264. Full circumference welding can be performed to form the end and end. For this reason, it is possible to perform full circumference welding without deteriorating the original coaxiality.

Further, when the coaxiality is out of the allowable range,
As described above, since the welding start portion and the welding end portion are provided at positions where the deviation can be corrected during the full circumference welding, the full circumference welding can be executed while correcting the coaxiality. In this way, when the hollow member 11 and the insertion member 12 are joined, the coaxiality can be corrected together, so that the welding method of this example can simplify the process. Also, the welding time can be shortened.

Further, the position of the welding end portion may be changed according to the measured deviation amount. That is, when the deviation amount is large, the welding may be continued in the entire circumference welded portion so that the welding start portion and the welding end portion may overlap with each other. Since the coaxiality correction can be controlled according to the overlap length, the coaxiality can be corrected with higher accuracy. Further, when the deviation amount is out of the allowable range, it is needless to say that the entire circumference welding may be first performed and then the correction welding process may be performed as in the first embodiment.

In the above-described first and second embodiments, an example is shown in which the overlapping portions are welded all around in order to secure the airtightness of the combined member. However, when airtightness is not required, The hollow member and the insertion member can be joined by welding for correcting the coaxiality in the correction welding process.

[Brief description of drawings]

FIG. 1A is a development view of a valve structure according to the first embodiment, and FIG.

FIG. 2 is an explanatory cross-sectional view of a main part of a superposed portion in the first embodiment.

FIG. 3 is an explanatory diagram of a measurement process according to the first embodiment.

FIG. 4 is an explanatory view of a correction welding process in the first embodiment.

5A and 5B are explanatory views showing (a) a shift direction of a combination member and (b) a shift amount in the first embodiment.

FIG. 6 is an explanatory diagram of a displacement direction and a position where a partial weld portion is provided in the first embodiment.

FIG. 7 is an explanatory view showing the shape of a partially welded portion according to the first embodiment.

FIG. 8 is a diagram showing how the center axis is corrected by the correction welding process in the first embodiment.

FIG. 9 is a diagram showing a relationship between a welding range and a deformation amount in a melting amount determining step in the first embodiment.

FIG. 10 is an explanatory view showing a welding process in the second embodiment.

FIG. 11 is an explanatory diagram of a welding device according to the second embodiment.

[Explanation of symbols]

1. ． ． Combination parts, 11. ． ． Hollow member, 12. ． ． Insert, 13. ． ． Overlapping part, 14. ． ． Partial weld,

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI F02M 61/16 F02M 61/16 P B23K 101: 04 B23K 101: 04 (56) Reference JP-A-4-348241 (JP, A ) JP-A 56-26691 (JP, A) JP-A 9-96264 (JP, A) JP-A 5-92220 (JP, A) JP-A 60-231562 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) B23K 26/22

Claims (23)

(57) [Claims] 1. When a hollow member and an insertion member are prepared, and when the insertion member is inserted into the hollow member to join them to form a combined member, the hollow member and the insertion member are overlapped with each other. by partially providing a partial weld portion to portion, a correction welding step of correcting the concentricity of the combination member, over the entire circumference of the portion overlapped above, the hollow member and above
A welding method for a combined member, comprising a main welding step of welding the entire circumference of the insertion member and the correction welding step and the main welding step at the same time . 2. The welding method for a combined member according to claim 1, wherein the hollow member and the insertion member are joined by the partial welded portion provided in the correction welding step. 3. The measuring method according to claim 1 or 2, wherein a measuring step of measuring a shift amount of coaxiality and a shift direction of the combination member is performed every time the correction welding process is performed, and the shift amount and the shift direction of the coaxiality are measured. A method for welding a combination member, characterized in that the correction welding process is continued until the desired range is reached. 4. The method according to any one of claims 1 to 3 ,
The melting amount determining step is performed before the correction welding process is performed, and the correction welding process is performed according to the melting amount determined in the melting amount determining process. Further, the melting amount determining process is the coaxiality of the combination member before the correction welding. A welding method for a combined member, which is a step of determining a partial weld portion forming position and a melting amount from basic data collected in advance according to a shift amount and a shift direction. 5. A hollow member and an insertion member are prepared, and when the insertion member is inserted into the hollow member and the two are joined to form a combined member, the insertion member is inserted into the hollow member, Performing a measurement step to measure the direction of deviation of the coaxiality between them, and then start welding at the position opposite to the direction of deviation of the coaxiality over the entire circumference of the overlapping portion where the hollow member and the insertion member overlap. Welding method for combined members, characterized in that both parts are welded all around. 6. The method according to claim 5, wherein a deviation amount of coaxiality is measured in the measuring step, and a welding end portion of the welding end portion is changed so that a welding overlap length after the full circumference welding is changed according to the deviation amount. A welding method for a combination member, characterized by setting a position. 7. A hollow member and an insertion member are prepared, and when the insertion member is inserted into the hollow member and the two are joined to form a combined member, the insertion member is inserted into the hollow member, A measurement step is performed to measure the deviation direction and the deviation amount of the coaxiality of both, and when the deviation amount of the coaxiality measured in the measurement step is within the allowable range, the hollow member and the insertion member overlap each other. With respect to the entire circumference of the overlapping portion, a plurality of welding heads placed in axially symmetrical positions are rotated relative to the entire circumference of the overlapping portion so that the entire circumference of the overlapping portion is completely rotated. A welding method for a combined member, characterized in that circumferential welding is performed. 8. The method according to claim 7, wherein when the deviation amount of the coaxiality measured in the measuring step is out of the allowable range, after the entire circumference of the overlapped portion is welded, the deviation direction is further changed. A method of welding a combination member, comprising: performing a correction welding step of correcting the coaxiality of the combination member by partially providing a partial welded portion to the overlapping portion at positions in opposite directions. 9. The welding method for a combined member according to claim 8, wherein the melting amount at the time of providing the partial welded portion is changed according to the shift amount of the coaxiality measured in the measuring step. 10. The method according to claim 7, wherein when the deviation amount of the coaxiality measured in the measuring step is out of the allowable range, a position opposite to the deviation direction of the coaxiality is set as a welding start portion. A welding method for a combined member, which comprises welding the entire circumference of the overlapped portion using a welding head. 11. The shift amount of coaxiality is measured in the measuring step according to claim 10 , and the shift amount is measured according to the shift amount.
A welding method for a combined member, wherein the position of the welding end portion is set so that the welding overlap length after the full circumference welding is changed. 12. The method for welding a combination member according to claim 1 , wherein the insertion member is press-fitted into the hollow member to be temporarily fixed. 13. The method according to any one of claims 1 to 12.
Combined member using welding method of combined member
Manufacturing method. 14. The method according to any one of claims 1 to 12.
The valve structure is manufactured using the welding method of
Build method. 15. A hollow member and an insertion member are prepared, and
Join the two with the above insertion member inserted in the hollow member.
To make a combined member, Overlapping of the hollow member and the insertion member overlapping each other
The hollow member and the insertion member are provided over the entire circumference of the portion.
Perform the main welding process of welding all around, Then, the hollow member and the insertion member are overlapped with each other.
To partially provide a partial weld to the mating part
Correction welding to correct the coaxiality of the above combination
Welding method for combined members characterized by performing steps
Law. 16. The partial welded part according to claim 15.
Is at a place different from the full-circumferential weld made in the main welding process above.
Welding method for combination members characterized by being installed in
Law. 17. The method according to claim 15 or 16, wherein
Between the main welding process and the correction welding process, the hollow part
Measurement to measure the direction of coaxial deviation between the material and the insertion member
Welding method for combined members characterized by performing steps
Law. 18. The correction welder according to claim 17,
The position where the above-mentioned partial weld is installed is
It is determined according to the deviation direction of the coaxiality obtained by
A method for welding a combination member, which is characterized in that 19. The correction welder according to claim 18,
And the amount of deviation of the coaxiality of the combined member
The measurement process is performed to measure the direction and
The correction welding process is repeated until the direction of deviation falls within the desired range.
A method for welding a combined member, characterized in that 20. The method according to any one of claims 15 to 19.
Before performing the above-mentioned correction welding process,
Perform the measurement according to the melting amount determined in the melting amount determination process.
The correction welding process is performed, and the melting amount determination process is
Deflection amount and deviation of coaxiality before correction welding of combined members
Partial weld shape based on basic data collected in advance depending on the orientation
Characterized in that it is a step of determining the formation position and the melting amount
Welding method for combined members. 21. The method according to claim 15 or 16, Before performing the correction welding process described above,
Providing the above-mentioned partial welds according to the direction of deviation of the coaxiality before contact
A combination characterized by including the step of determining the position to be
Welding method for joint members. 22. The method according to any one of claims 15 to 21.
Combination part using welding method of such combination members
Method of manufacturing wood. 23. The method according to any one of claims 15 to 21.
Of the valve structure using the welding method of
Production method.