JP6308865B2 - Composite welding equipment - Google Patents

Description

  The present invention relates to a composite welding apparatus, and more particularly, to a composite welding apparatus capable of achieving both prevention of spatter adhesion to protective glass by gas injection and reduction of entrainment of shield gas in gas.

  A composite welding apparatus that performs a combination of laser welding and gas shielded arc welding is known. In such a composite welding apparatus, in order to suppress the condensing lens for condensing the laser beam used for laser welding and irradiating the welding position from being attached to protective glass for protecting from spatter scattered during welding, Various measures have been taken.

  For example, an air blow device (nozzle device) for injecting high-speed air (gas) between the protective glass and the welding position is provided, and spatter is blown off by the high-speed air injected by the air blow device, thereby protecting the sputter protection glass. There is known a technique for preventing adhesion to the surface (Patent Document 1).

Japanese Patent Laid-Open No. 2000-263276 (FIG. 1 (A) and the like)

  Here, in the above-described conventional technology, when high-speed air is blown vigorously to blow off the spatter, shield gas is caught in the high-speed air, and the shielding between the arc and the atmosphere by the shield gas is hindered. On the other hand, when the momentum of the high-speed air is weakened, the spatter cannot be blown off, and the spatter cannot be sufficiently prevented from adhering to the protective glass. Thus, in the above-described conventional technology, there is a problem that it is difficult to achieve both prevention of spatter adhesion to the protective glass and prevention of entrapment of the shielding gas into the gas.

  The present invention has been made to solve the above-described problems, and is a composite welding apparatus capable of achieving both prevention of spatter adhesion to protective glass by gas injection and reduction of shield gas entrainment in gas. It is intended to provide.

Means for solving the problems and effects of the invention

According to the composite welding apparatus of the first aspect, the spatter shielding portion shields most of the spatter generated during welding from the shielding plate, and the spatter that has passed through the first passage hole is generated by the gas injected from the nozzle device. By blowing off, it is possible to prevent spatter from adhering to the protective glass.
In addition, a lid plate that is formed at a position corresponding to the first passage hole and has a second passage hole through which laser light can pass is installed on the pair of rectifying plates so as to face the shielding plate. Since at least the gas injection position by the nozzle device extends to the downstream side in the gas injection direction from at least the first passage hole of the shielding plate, at least the gas injected from the nozzle device has the first passage hole and the second passage. The gas can be prevented from diffusing upward until it passes between the passage holes. Thereby, since the fall of the flow velocity of the gas sprayed on the sputter | spatter which passed the 1st passage hole can be suppressed, there exists an effect that it can make it easy to blow off a sputter | spatter.
In addition, the extending length dimension from the first passage hole of the shielding plate to the downstream side in the gas injection direction is set larger than the extending length dimension from the second passage hole of the cover plate to the downstream side in the gas injection direction. Therefore, the gas that has passed between the cover plate and the shielding plate can be diffused upward. That is, since the atmosphere on the lower surface side of the shielding plate can be suppressed from being entrained in the gas that has passed above the shielding plate, there is an effect that the shielding gas can be prevented from being entrained in the gas flow.
In addition, the extension length dimension from the second passage hole of the pair of rectifying plates to the downstream side in the gas injection direction is longer than the extension length dimension from the second passage hole of the lid plate to the downstream side in the gas injection direction. Since it is set large, the gas that has passed between the cover plate and the shielding plate can be diffused upward. Therefore, since it can suppress that the air | atmosphere on the lower surface side of a shielding board is caught in the gas which has finished passing through the upper surface side of a shielding board, there exists an effect that it can reduce that shielding gas is caught in the flow of gas.

  In addition, a pair of rectifying plates are erected on the upper surface side of the shielding plate at a position sandwiching the first passage hole, and the pair of rectifying plates extend along the gas injection direction and at least the first passage. In a portion located downstream of the hole in the gas injection direction, the facing distance between the pair of rectifying plates is widened from the upstream side to the downstream end of the gas injection direction. Thereby, the flow velocity of the gas that has passed over the first passage hole can be reduced.

  Therefore, by vigorously injecting the gas from the nozzle device, it is easy to blow away the spatter that passes through the first passage hole, and at the downstream side of the gas injection direction from the first passage hole, the gas flow velocity is reduced. The shielding gas can be prevented from being caught in the gas flow that has passed through the upper surface side of the shielding plate. Therefore, prevention of adhesion of the sputter to the protective glass by ensuring the flow rate of the gas blown to the sputter that has passed through the first passage hole, and reduction of the flow rate of the gas that has passed between the pair of rectifying plates to the gas There is an effect that it is possible to achieve both reduction in entrainment of shield gas.

  According to the composite welding apparatus of the second aspect, in addition to the effect of the composite welding apparatus of the first aspect, a pair of rectifications at a position exceeding at least the first passage hole of the shielding plate from the gas injection position by the nozzle device. Since the opposing space | interval of a board is set uniformly, it can suppress that the flow velocity of the gas injected from the nozzle apparatus falls before passing the upper direction of a 1st passage hole. Therefore, since gas can be blown vigorously to the sputter that has passed through the first passage hole, there is an effect that the spatter can be easily blown off.

According to the composite welding apparatus of the third aspect , in addition to the effect exhibited by the composite welding apparatus according to the first or second aspect , the portion of the pair of rectifying plates that is located downstream of the cover plate in the gas injection direction. Since the height dimension from the shielding plate is set to be larger than the facing distance between the lid plate and the shielding plate, when the gas that has passed between the lid plate and the shielding plate is diffused upward, The gas can be prevented from diffusing laterally beyond the current plate. Therefore, since it can suppress that the air | atmosphere on the lower surface side of a shielding board is caught in the gas which has finished passing through the upper surface side of a shielding board, there exists an effect that it can reduce that shielding gas is caught in the flow of gas.

According to the composite welding apparatus of the fourth aspect , in addition to the effect produced by the composite welding apparatus according to any one of the first to third aspects, the shielding plate is located downstream of the first passage hole in the gas injection direction. The portion located between the pair of rectifying plates is provided with an inclined bottom portion that is inclined upward with respect to the horizontal plane toward the downstream side in the gas injection direction, so that the gas that has passed through the upper surface side of the shielding plate is inclined. It can be guided upward along the bottom. Thereby, it can suppress that the air | atmosphere on the lower surface side of a shielding board is caught in the gas which has passed the upper surface side of the shielding board, As a result, there exists an effect that it can reduce that a shielding gas is caught in the flow of gas. .

It is a schematic diagram showing the principal part of the composite welding apparatus in 1st Embodiment of this invention. It is a top view of a sputter | spatter shielding part. (A) is sectional drawing of the sputter | spatter shielding part in the IIIa-IIIa line | wire of FIG. 2, (b) is sectional drawing of the sputter | spatter shielding part in the IIIb-IIIb line | wire of FIG. It is the schematic diagram showing the principal part of the composite welding apparatus in 2nd Embodiment. (A) is a top view of the sputtering shielding part in 3rd Embodiment, (b) is a top view of the sputtering shielding part in 4th Embodiment. It is the schematic diagram showing the principal part of the composite welding apparatus in 5th Embodiment. It is a top view of a sputter | spatter shielding part. It is a top view of the sputter | spatter shielding part of the composite welding apparatus in 6th Embodiment.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. First, with reference to FIG. 1, a schematic configuration of the composite welding apparatus 100 in the first embodiment of the present invention will be described. FIG. 1 is a schematic diagram schematically showing the main part of the composite welding apparatus 100 according to the first embodiment of the present invention.

  As shown in FIG. 1, the composite welding apparatus 100 is a so-called laser-arc hybrid welding apparatus that combines laser welding and gas shielded arc welding, and is disposed above a welding position where a base material w is disposed. A laser irradiation unit 20, a torch unit 30 disposed below the laser irradiation unit 20 and above the welding position, and a laser irradiation unit 20 disposed above the torch unit 30 and the welding position. And a sputter shield 40 disposed below the main body.

The laser irradiation unit 20 is for performing laser welding to the base metal w disposed to the welding position, the laser oscillation apparatus for generating laser light L (not shown), generated from the laser oscillation unit The condensing lens 21 which condenses the laser beam L and irradiates the base material w, and the protective glass 22 which protects the condensing lens 21 are provided.

  The protective glass 22 is a member for preventing spatter generated during welding processing on the base material w disposed at the welding position from adhering to the condensing lens 21, and between the condensing lens 21 and the welding position. And the laser L condensed by the condenser lens 21 can be transmitted.

  The torch part 30 performs gas shielded arc welding on the base material w, and generates an arc between the base material w and an arc generating means (not shown) and an arc generated from the arc generating means. Shield gas injection means (not shown) for injecting a shield gas for shielding from the atmosphere toward the base material w is provided.

  In composite welding apparatus 100 according to the present embodiment, laser beam L focused on condenser lens 21 is irradiated along the vertical direction (vertical direction in FIG. 1), and the direction in which laser L is irradiated is irradiated. Shield gas is injected toward the base material w from a direction inclined by 30 degrees.

  The sputter shield 40 is for preventing spatter from adhering to the protective glass 22.

  Next, with reference to FIG.2 and FIG.3, the detailed structure of the sputter | spatter shielding part 40 is demonstrated. FIG. 2 is a top view of the sputter shield 40. FIG. 3A is a cross-sectional view of the sputter shield 40 taken along the line IIIa-IIIa in FIG. 2, and FIG. 3B is a cross-sectional view of the sputter shield 40 taken along the line IIIb-IIIb in FIG. In FIGS. 2 and 3B, the flow of gas injected from the nozzle device 44 is schematically shown by arrows.

  As shown in FIG. 2, the sputter shielding unit 40 includes a plate-shaped shielding plate 41, a pair of rectifying plates 42 erected on the upper surface side (front side of FIG. 2) of the shielding plate 41, and the pair of the shielding plates 40. A lid plate 43 provided on the rectifying plate 42 and a nozzle device 44 that mainly injects gas into the space surrounded by the shielding plate 41, the pair of rectifying plates 42 and the lid plate 43 are mainly provided.

  The shielding plate 41 is a part for shielding spatter scattered toward the protective glass 22 (see FIG. 1) while allowing the laser light L to pass therethrough. The shielding plate 41 includes a first passage hole 41a that is formed so as to allow the laser light L to pass therethrough, and the shielding plate 41 is disposed in a state where the first passage hole 41a is disposed at a position corresponding to the position irradiated with the laser light L. 41 is arranged along the direction orthogonal to the irradiation direction of the laser light L (the vertical direction in FIG. 2).

  Moreover, the side edge part (end part in the up-down direction of FIG. 2) located in the direction orthogonal to the gas injection direction among the shielding plates 41 rises toward the upper surface side (the front side of FIG. 2) of the shielding plate 41. An inclined side end portion 41b that is inclined is formed.

  The pair of rectifying plates 42 is a portion for guiding the gas ejected from the nozzle device 44, and extends along the gas ejection direction (left-right direction in FIG. 2).

  The pair of rectifying plates 42 includes a pair of first rectifying parts 42a formed on one side in the extending direction (upstream side of the gas injection direction, right side in FIG. 2) and the other side in the extending direction of the first rectifying part 42a. A pair of second rectifying parts 42b in which one end part in the extending direction is connected to the end part (downstream of the gas injection direction, left side in FIG. 2), and the other side in the extending direction of the second rectifying part 42b And a third rectifying unit 42c having an end on one side extending in the extending direction.

  The first rectification unit 42a is formed in a rectangular plate shape, and a pair of rectification units 42a are provided upright on both sides of the first passage hole 41a. The pair of first rectification units 42a are extended along the gas injection direction so that the facing distance is uniform.

  The first rectifying unit 42a has an end on one side in the extending direction located at the end of the shielding plate 41 on the upstream side in the gas injection direction, and an end on the other side in the extending direction of the first rectifying unit 42a. It is located downstream of the first passage hole 41a in the gas injection direction. Further, the first rectifying unit 42a has a constant height from the shielding plate 41 in the extending direction.

  The second rectifying unit 42b is formed in a rectangular plate shape. The pair of second rectification units 42b are arranged such that the facing distance between the pair of second rectification units 42b gradually increases from the upstream side to the downstream side in the gas injection direction. The second rectification unit 42b is set such that the height from the shielding plate 41 gradually increases from the upstream side to the downstream side in the gas injection direction.

  The third rectifying unit 42c is formed in a rectangular plate shape. The pair of third rectification parts 42c are extended along the gas injection direction so that the interval between the pair of third rectification parts is uniform, and the end on the other side of the extension direction of each third rectification part 42c is downstream of the gas injection direction. It is located at the end of the shielding plate 41 on the side. The third rectification unit 42c has a constant height from the shielding plate 41 in the extending direction.

  Thus, the pair of rectifying plates 42 has the first rectifying portion 42a so that the facing distance is uniform from the end of the shielding plate 41 on the upstream side in the gas injection direction to the position beyond the first passage hole 41a. A pair of second rectifying portions 42b and a second rectifying portion 42b are formed along the gas injection direction so that the facing distance is wider than the pair of first rectification portions 42a downstream of the first passage hole 41a in the gas injection direction. Three rectification parts 42c are formed.

  Further, in the pair of rectifying plates 42, the height of the first rectifying portion 42a from the shielding plate 41 is set to be constant in the extending direction, and the height of the first rectifying portion 42a from the shielding plate 41a is set. The height dimension from the shielding plate 41 of the 2nd rectification | straightening part 42b and the 3rd rectification | straightening part 42c is set so that it may become larger than a dimension.

  An inclined bottom portion 45 that is inclined upward with respect to the horizontal plane from the upstream side to the downstream side in the gas injection direction is formed in a portion of the shielding plate 41 located between the third rectifying portions 42c.

  The cover plate 43 is a portion that suppresses the upward diffusion of the gas injected from the nozzle device 44 while allowing the laser light L to pass therethrough, and is disposed to face the shielding plate 41. The lid plate 43 is formed with a second passage hole 43a through which the laser light L can pass, at a position corresponding to the first passage hole 41a of the shielding plate 41.

  Note that the opening area of the first passage hole 41a as viewed from the irradiation direction of the laser light L (perpendicular to the plane of FIG. 2) is set smaller than the opening area of the second passage hole 43a. By reducing the opening area of the first passage hole 41a formed in the shielding plate 41, it is possible to reduce spatter passing through the first passage hole 41a.

  Here, the sputter shielding part 40 has a length dimension extending from the first passage hole 41a of the shielding plate 41 to the downstream side in the gas injection direction, and is downstream of the second passage hole 43a of the cover plate 43 in the gas injection direction. The cover plate 43 is installed only on the first rectifying portion 42a of the pair of rectifying plates 42. Thereby, among the spaces formed between the pair of rectifying plates 42, the space formed between the pair of first rectifying portions 42 a is closed by the lid plate 43 on the upper side, whereas the second rectifying portion The space formed between 42b and the third rectification unit 42c is open upward.

  In addition, since the lid plate 43 is installed only on the first rectifying unit 42a of the pair of rectifying plates 42, the height dimension of the second rectifying unit 42b and the third rectifying unit 42c from the shielding plate 41 is determined by the lid plate. 43 and the shielding plate 41 are larger than the facing distance.

  As shown to Fig.3 (a), the nozzle apparatus 44 is an apparatus which injects the gas for blowing off the sputter | spatter which passed the 1st passage hole 41a. The nozzle device 44 is formed with an ejection port 44a through which gas is ejected, and the nozzle device 44 is configured so that the gas ejected from the ejection port 44a passes between the first passage hole 41a and the second passage hole 43a. Is arranged.

  In addition, the width dimension (FIG. 3 (a) left-right dimension) of the jet nozzle 44a is set to the dimension larger than the internal diameter of the 1st passage hole 41a, and smaller than the internal diameter of the 2nd passage hole 43a. Thereby, while being able to spray gas reliably to the sputter | spatter which passed the 1st passage hole 41a, suppressing the enlargement of the opening area of the jet nozzle 44a, it is gas, suppressing the energy for injecting gas. Can be ejected vigorously from the ejection port 44a.

  As shown in FIG. 3B, most of the spatter that scatters toward the protective glass 22 (see FIG. 1) is shielded by the shielding plate 41 during the welding process. However, since the first passage hole 41a for allowing the laser light L to pass through is formed in the shielding plate 41, a part of the spatter passes through the first passage hole 41a.

  On the other hand, gas is injected toward the upper direction of the 1st passage hole 41a from the nozzle apparatus 44. FIG. By blowing off the spatter that has passed through the first passage hole 41a by the gas injected from the nozzle device 44, it is possible to avoid the spatter from adhering to the protective glass 22.

  Here, by increasing the momentum of the gas ejected from the nozzle device 44, it is possible to reliably blow off the spatter. On the other hand, when the gas ejected vigorously diffuses, the atmosphere on the lower surface side of the shielding plate 41 is converted into a gas. The shield gas that is entrained and injected toward the base material w (see FIG. 1) is also entrained in the gas. In this case, the shielding between the arc and the atmosphere by the shielding gas becomes unstable, and on the contrary, it becomes a factor of increasing the amount of spatter scattering.

  On the other hand, if the momentum of the gas injected from the nozzle device 44 is weakened, the spatter cannot be blown out sufficiently, and the spatter adheres to the protective glass 22 increases.

  On the other hand, the sputter shielding unit 40 injects gas toward the space surrounded by the shielding plate 41, the pair of rectifying plates 42 and the lid plate 43.

  The pair of rectifying plates 42 is arranged in the gas injection direction so that the first rectification portions 42a extending from the end portion on the upstream side in the gas injection direction to the position exceeding the first passage hole 41a have a uniform facing distance. Therefore, it is possible to suppress a decrease in the flow rate of the gas injected from the nozzle device 44 until it passes above the first passage hole 41a. Therefore, since the gas can be blown vigorously to the spatter that has passed through the first passage hole 41a, it is possible to easily blow off the spatter. Furthermore, gas can be prevented from diffusing laterally (in the direction toward the front of the paper in FIG. 3B) until the gas jetted from the nozzle device 44 passes above the first passage hole 41a.

  In addition, the pair of rectifying plates 42 is disposed so as to face the shielding plate 41 by laying the cover plate 43 on the first rectifying portion 42a, and is a space formed between the pair of first rectifying portions 42a. Since the upper portion is closed by the lid plate 43, the gas diffuses upward (upward in FIG. 3B) until the gas injected from the nozzle device 44 passes above the first passage hole 41a. Can be prevented.

  In this way, by injecting gas into the space surrounded by the shielding plate 41, the pair of rectifying plates 42 and the lid plate 43, the gas injected from the nozzle device 44 diffuses upward or laterally. Can be prevented. Thereby, since it can suppress that the flow velocity of the gas injected from the nozzle apparatus 44 passes through the upper direction of the 1st passage hole 41a, it can suppress gas with respect to the sputter | spatter which passed the 1st passage hole 41a. While being able to spray vigorously, the sputter | spatter which passed the 1st passage hole 41a can be reliably blown off by allowing gas to pass through the upper surface side of the 1st passage hole 41a reliably.

  In addition, in the pair of rectifying plates 42, as the facing distance of the pair of second rectifying portions 42 b formed on the downstream side in the gas injection direction from the first passage hole 41 a moves from the upstream side in the gas injection direction toward the downstream side. It has become wide. Thereby, since the gas which passes above the 1st passage hole 41a and enters between a pair of 2nd rectification | straightening parts 42b can be spread | diffused to the side, the flow velocity of gas can be reduced.

  In addition, since the pair of second rectification parts 42b are gradually widened from the upstream side to the downstream side in the gas injection direction, the pair of second rectification parts 42b are arranged on the downstream side in the gas injection direction. Compared with the case where the first rectifying unit 42a is vertically connected to the end of the first rectifying unit 42a and extends in directions away from each other, the gas can be easily diffused, and as a result, the gas flow velocity is reduced. It can be made easy.

  Further, the sputter shielding unit 40 includes a pair of rectifying plates 42, a pair of first rectifying units 42 a provided with a lid plate 43, and a space formed between the pair of first rectifying units 42 a above the lid. The lid 43 is not erected on the pair of second rectification units 42b and the pair of third rectification units 42c, but is closed by the plate 43, and the pair of second rectification units 42b and the pair of third rectification units 42c. The upper part of the space formed between the rectifying parts 42c is open. Therefore, the gas that has entered between the pair of second rectification units 42b and the pair of third rectification units 42c can be easily diffused upward.

  In addition to this, the height of the sputter shielding unit 40 from the shielding plate 41 of the second rectifying unit 42b and the third rectifying unit 42c is set to be larger than the facing distance between the cover plate 43 and the shielding plate 41. The upper ends of the second rectification unit 42b and the third rectification unit 42c protrude above the cover plate 43 (upper side in FIG. 3B).

  As a result, when the gas that has entered the second rectification unit 42b and the third rectification unit 42c is diffused upward, the gas passes the second rectification unit 42b and the third rectification unit 42c, and is lateral (see FIG. ) Diffusion in the direction perpendicular to the paper surface) can be suppressed.

  Furthermore, since a portion of the shielding plate 41 located between the third rectifying portions 42c is formed with an inclined bottom portion 45 that is inclined upward with respect to the horizontal plane from the upstream side to the downstream side in the gas injection direction, The gas that has passed between the third rectifying portions 42 c can be guided upward by the inclined bottom portion 45.

  In addition, since the pair of third rectifying portions 42c are set to have a uniform facing interval, it is possible to easily guide the gas that flows to the side upward.

  Furthermore, since the inclined side end portion 41b is formed at the side end portion of the shielding plate 41, the gas diffused to the side of the shielding plate 41 can be guided upward.

  As described above, the gas that has passed through the first passage hole 41a and has entered between the pair of second rectification units 42b and the pair of third rectification units 42c can be easily diffused upward. Even if the gas is jetted vigorously, it is possible to prevent the atmosphere on the lower surface side of the shielding plate 41 from being involved in the gas flow that has passed through the upper surface side of the shielding plate 41, so that the shielding gas is involved in the gas flow. Can be reduced.

  As described above, the gas is ejected vigorously from the nozzle device 44, and the gas is vigorously ejected with respect to the sputtering by suppressing the decrease in the flow velocity of the gas until it passes over the first passage hole 41a. Thus, it is possible to easily blow off the spatter passing through the first passage hole 41a. Furthermore, by reducing the flow velocity of the gas after passing through the first passage hole 41a, it is possible to reduce that the shielding gas is involved in the gas flow that has passed through the upper surface side of the shielding plate 41.

  Therefore, by preventing the adhesion of the sputter to the protective glass 22 (see FIG. 1) by ensuring the flow velocity of the gas blown against the sputter that has passed through the first passage hole 41a, the passage between the pair of rectifying plates 42 is completed. Furthermore, it is possible to achieve both reduction of entrainment of shield gas in the gas by reducing the flow rate of the gas.

  Next, a second embodiment will be described with reference to FIG. In the composite welding apparatus 100 in the first embodiment, the case where the laser beam L focused on the condenser lens 21 is irradiated along the vertical direction has been described. In the composite welding apparatus 200 in the second embodiment, The shield gas injected from the torch part 30 is injected along the vertical direction. FIG. 4 is a schematic diagram schematically showing the main part of the composite welding apparatus 200 in the second embodiment. Note that the same parts as those in the first embodiment are denoted by the same reference numerals, and the following description is omitted.

  As shown in FIG. 4, in the composite welding apparatus 200, the shield gas injected from the torch part 30 is injected along the vertical direction, and the laser beam condensed on the condenser lens 21 is in the shield gas injection direction. It is irradiated from the direction inclined 30 degrees.

  Thereby, compared with the case where the laser beam L is irradiated along the vertical direction, the amount of spatter scattered and passing through the first passage hole 41a of the shielding plate 41 can be reduced. Spatter adhesion can be easily prevented.

  Next, a third embodiment will be described with reference to FIG. In the first embodiment, only the pair of second rectification units 42b out of the pair of rectification plates 42 including the pair of first rectification units 42a, the pair of second rectification units 42b, and the pair of third rectification units 42c. In the third embodiment, the pair of rectifying plates 342 are disposed upstream in the injection direction over the entire extending direction, although the opposing interval is set to increase from the upstream side in the gas injection direction toward the downstream side. Is set so that the facing interval becomes wider toward the downstream side. FIG. 5A is a top view of the sputter shield 340 in the third embodiment, and schematically shows the flow of gas injected from the nozzle device 44 with arrows. The same parts as those in the above-described embodiments are denoted by the same reference numerals, and the following description is omitted.

  As shown in FIG. 5 (a), the sputter shield 340 includes a shield plate 41 having a first passage hole 41a and a pair of rectifiers standing on both sides of the shield plate 41 across the first passage hole 41a. A plate 342, a cover plate 343 installed on the pair of rectifying plates 342, and a nozzle device 44 are provided.

  The rectifying plate 342 extends along the injection direction of the gas injected from the nozzle device 44, and the interval between the pair of rectifying plates 342 gradually increases from the upstream side to the downstream side of the gas injection direction. ing. Further, a portion of the shielding plate 41 between the pair of rectifying plates 342 and located downstream of the first passage hole 41a in the gas injection direction is a horizontal plane from the gas injection direction upstream to the downstream. An inclined bottom portion 345 that is inclined upward is formed.

  Thereby, even if gas is ejected vigorously from the nozzle device 44, it is possible to prevent the atmosphere on the lower surface side of the shielding plate 41 from being caught in the flow of gas that has passed through the upper surface side of the shielding plate 41. It can reduce that shield gas is caught in a flow.

  Next, a fourth embodiment will be described with reference to FIG. In the first embodiment, only the pair of second rectification units 42b out of the pair of rectification plates 42 including the pair of first rectification units 42a, the pair of second rectification units 42b, and the pair of third rectification units 42c. In the fourth embodiment, only the third rectification unit 442c of the pair of rectifying plates 442 is upstream in the injection direction, although the opposing interval is set to widen from the upstream side in the gas injection direction toward the downstream side. Is set so that the facing interval becomes wider toward the downstream side. FIG. 5B is a top view of the sputter shield 440 in the fourth embodiment, and schematically shows the flow of gas injected from the nozzle device 44 with arrows. The same parts as those in the above-described embodiments are denoted by the same reference numerals, and the following description is omitted.

  As shown in FIG. 5B, the sputter shield 440 includes a shield plate 41 having a first passage hole 41a and a pair of rectifiers standing on both sides of the shield plate 41 across the first passage hole 41a. A plate 442, a lid plate 43, and a nozzle device 44 are provided.

  The pair of rectifying plates 442 extend in the direction extending to the end of the pair of first rectifying portions 42a and the other side in the extending direction of the first rectifying portions 42a (the downstream side in the gas injection direction, the left side in FIG. 5B). A pair of second rectification portions 442b provided with one end portion on one side, and a third portion provided with an end portion on one side in the extending direction on the other end portion in the extending direction of the second rectification portion 442b. And a rectifying unit 442c.

  The 2nd rectification | straightening part 442b is formed in a rectangular plate shape, and is set along the gas injection direction so that the opposing space | interval of a pair of 2nd rectification | straightening part 442b may become uniform.

  The third rectification unit 442c is formed in a curved plate shape, and is disposed so that the facing distance between the pair of third rectification units 442c is separated from the upstream side toward the downstream side in the gas injection direction. . In addition, an inclined bottom portion 445 that is inclined upward with respect to the horizontal plane from the upstream side toward the downstream side in the gas injection direction is formed in a portion of the shielding plate 41 located between the pair of third rectifying portions 442c. .

  Since the sputter shielding unit 440 can suppress the gas flow rate from decreasing before the gas passes between the pair of first rectification units 42a and the pair of second rectification units 442b, the first passage is performed. Gas can be blown vigorously against the spatter that has passed through the hole 41a. On the other hand, the gas that has entered between the pair of third rectifying units 442c can be easily diffused upward or sideward (in FIG. 5B, in the vertical direction or the vertical direction on the paper surface), so that the gas flow rate is efficiently reduced. Can be made.

  As described above, the gas is ejected vigorously from the nozzle device 44, and the gas is vigorously ejected with respect to the sputtering by suppressing the decrease in the flow velocity of the gas until it passes over the first passage hole 41a. Thus, it is possible to easily blow off the spatter passing through the first passage hole 41a. Furthermore, by reducing the flow velocity of the gas after passing through the first passage hole 41a, it is possible to reduce that the shielding gas is involved in the gas flow that has passed through the upper surface side of the shielding plate 41.

  Next, a fifth embodiment will be described with reference to FIGS. In the first embodiment, the case where the gas jetted from the nozzle device 44 is guided to the pair of rectifying plates 42, the cover plate 43, and the inclined bottom portion 45 has been described. In the fifth embodiment, from the nozzle device 44, The injected gas is guided to the rectification unit 542 and the discharge unit 545. FIG. 6 is a schematic diagram schematically showing the main part of the composite welding apparatus 500 according to the fifth embodiment, and the flow of gas discharged from the discharge part 545 is schematically shown by arrows. FIG. 7 is a top view of the sputter shield 540. The same parts as those in the above-described embodiments are denoted by the same reference numerals, and the following description is omitted.

  As shown in FIGS. 6 and 7, the sputter shielding unit 540 includes a shielding plate 41, a rectification unit 542 disposed on the upper surface side of the shielding plate 41, and a discharge unit 545 provided continuously to the rectification unit 542. And a nozzle device 44.

  The rectifying unit 542 is a part for guiding the gas ejected from the nozzle device 44 and is formed in a cylindrical shape. The rectifying unit 542 is disposed above the first passage hole 41 a and is supported by the shielding plate 41 by a plate-like rib 542 a erected on the shielding plate 41. Further, the rectifying unit 542 is formed with two through holes 542b through which the laser light L can pass at positions corresponding to the first passage holes 41a. The through hole 542b is formed so that the opening area thereof is larger than the opening area of the first passage hole 41a.

  The rectifying unit 542 is disposed in a state in which one end side (the right side in FIG. 7) is opposed to the ejection port 44 a (see FIG. 3) of the nozzle device 44. Thereby, since the gas injected from the jet outlet 44a is blown into the inside of the rectifying unit 542, the spatter that has entered the inside of the rectifying unit 542 through the first passage hole 41a and the through hole 542b can be blown off by the gas. As a result, it is possible to prevent spatter from adhering to the protective glass 22.

  The discharge part 545 is formed in a cylindrical shape having a bellows part 545a configured in a bellows shape, and one end side of the discharge part 545 communicates with the other end side (right side in FIG. 7) of the rectification part 542, and the discharge part The other end side of 545 (the left side in FIG. 7) is opened upward. Therefore, the gas that has passed through the rectifying unit 542 and has flowed into the discharge unit 545 is discharged upward from the other end side of the discharge unit 545.

  Therefore, the composite welding apparatus 500 can prevent the shielding gas from being caught in the gas that has passed through the rectifying unit 542 while reliably blowing off the sputter that has entered the rectifying unit 542 by the gas jetted from the nozzle device 44. Thus, it is possible to achieve both prevention of adhesion of sputtering to the protective glass 22 and prevention of inclusion of shield gas in the gas.

  Moreover, since the bellows part 545a is formed in the discharge part 545, the direction of the other end part of the discharge part 545 opened by deforming the discharge part 545 can be changed. Thereby, the space required for installing the composite welding apparatus 500 can be reduced.

  Here, the dimension along the axial center of the discharge part 545 is desirably set to a dimension not more than five times the outer diameter of the discharge part 545. That is, when the dimension along the axial center of the discharge part 545 is larger than five times the outer diameter of the discharge part 545, the gas flows back without reaching the other end side of the discharge part 545, As a result, the gas flows out from the through hole 542b to the outside of the discharge part 545, and the shield gas is caught in the outflowed gas.

  On the other hand, since the gas can be reliably discharged upward by reducing the dimension along the axial center of the discharge part 545, it is possible to prevent the shield gas from being caught in the gas.

  Next, a sixth embodiment will be described with reference to FIG. In the first embodiment, the case where the gas jetted from the nozzle device 44 is guided to the pair of rectifying plates 42, the cover plate 43, and the inclined bottom portion 45 has been described, but in the sixth embodiment, from the nozzle device 44, The injected gas is guided to the pair of rectifying plates 642 and the discharge unit 545. FIG. 8 is a top view of the sputter shield 640 in the sixth embodiment. The same parts as those in the above-described embodiments are denoted by the same reference numerals, and the following description is omitted.

  As shown in FIG. 8, the sputter shielding unit 640 includes a shielding plate 41, a pair of rectifying plates 642 erected on the upper surface side (front side in FIG. 8) of the shielding plate 41, and the pair of rectifying plates 642. A cover plate 43, a discharge plate 545 connected to the pair of rectifying plates 642 and the cover plate 43, and a nozzle device 44.

  The pair of rectifying plates 642 are formed in a rectangular plate shape, and are erected on both sides of the first passage hole 41a. The pair of first rectifying plates 42a has a gas injection direction so that the opposing distance is uniform. Since the gas jetted from the nozzle device 44 is guided so as to pass above the first passage hole 41a, the gas passes until the gas passes above the first passage hole 41a. In addition, the gas can be prevented from diffusing laterally (the vertical direction in FIG. 8).

  Moreover, since the upper part of the space formed between the pair of rectifying plates 642 is closed by the lid plate 43, the gas jetted from the nozzle device 44 is passed until it passes above the first passage hole 41a. , Gas can be prevented from diffusing upward (frontward in FIG. 8).

  In this way, by injecting gas into the space surrounded by the shielding plate 41, the pair of rectifying plates 642 and the lid plate 43, the gas injected from the nozzle device 44 diffuses upward or laterally. Can be prevented. Thereby, since it can suppress that the flow velocity of the gas injected from the nozzle apparatus 44 falls before passing the upper direction of the 1st passage hole 41a, gas is vigorously pushed to the spatter which passed the 1st passage hole 41a. While being able to spray, the spatter which passed the 1st passage hole 41a can be reliably blown off by allowing gas to pass through the upper surface side of the 1st passage hole 41a reliably.

  Note that the pair of rectifying plates 642 and the cover plate 43 and the discharge portion 545 are connected to each other via a cylindrical joint portion 646. The joint portion 646 is formed to have a substantially rectangular cross section that can be fitted to an opening formed by the shielding plate 41, the pair of rectifying plates 642 and the lid portion 43 at one end side, and the other end of the joint portion 646. The side is formed in a substantially circular cross section that can be fitted to one end of the discharge portion 545.

  Since the discharge portion 545 is connected to the pair of rectifying plates 642 and the lid plate 43, and the internal space surrounded by the shielding plate 41, the pair of rectifying plates 642 and the lid plate 43 and the discharge portion 545 are communicated, The gas that has passed between the rectifying plates 642 flows into the discharge portion 545, and the gas that has flowed in is discharged upward from the other end side of the discharge portion 545.

  Thereby, it is possible to prevent the shield gas from being caught in the gas that has passed through the pair of rectifying plates 642 while reliably blowing off the sputter that has passed through the first passage hole 41a by the gas jetted from the nozzle device 44. Therefore, it is possible to achieve both prevention of adhesion of spatter to the protective glass 22 (see FIG. 6) and prevention of entrapment of the shield gas in the gas.

  As mentioned above, although this invention was implemented based on each embodiment, it is not necessarily limited to this, It can be guessed easily that various improvement deformation | transformation are possible within the range which does not deviate from the meaning of this invention. Is.

  For example, in each of the above embodiments, the case where the shielding plate 41 is disposed along the direction orthogonal to the irradiation direction of the laser L has been described. However, the present invention is not necessarily limited to this, and the shielding plate 41 is at least a laser. What is necessary is just to be arrange | positioned along the direction which cross | intersects the irradiation direction of L.

  In each of the above embodiments, the opening area of the first passage hole 41a formed in the shielding plate 41 is equal to the second passage hole 43a formed in the cover plates 43 and 343 or the through hole 542b formed in the rectification unit 542. Although the case where it is formed smaller than the opening area has been described, the present invention is not necessarily limited to this, and the opening area of the first passage hole 41a may be equal to or larger than the opening area of the second passage hole 43a or the through hole 542b. . Thereby, the dimensional management of the 1st passage hole 41a, the 2nd passage hole 43a, or the penetration hole 542b is simplified, and the manufacturing cost of sputter shielding part 40,340,440 can be controlled.

  In the first to fourth embodiments, the case where the shielding plate 41 includes the inclined bottom portions 45, 345, and 445 has been described. However, the present invention is not limited to this, and the inclined bottom portions 45, 345, and 445 are omitted. May be. Thereby, the shape of the sputter | spatter shielding part 40,340,440 can be simplified and the manufacturing cost of the sputter | spatter shielding part 40,340,440 can be suppressed.

  In the first to fourth embodiments, the inclined bottom portions 45, 345, 445 are disposed between the pair of rectifying plates 42, 342, 442 of the shielding plate 41 (the pair of third rectifying plates 42c, 442c). However, the present invention is not necessarily limited to this, and the entire portion (a pair of rectifying plates 42) of the shielding plate 41 that is located downstream of the first passage hole 41a in the gas injection direction. , 342, and 442) may be formed so as to rise and incline with respect to the horizontal plane from the upstream side to the downstream side in the gas injection direction.

  In the first embodiment and the fourth embodiment, the case where the cover plate 43 is installed only on the pair of first rectifying plates 42a out of the pair of rectifying plates 42 and 442 has been described. Instead, in addition to the pair of first rectification units 42a, the cover plate 43 may be installed on a part or the whole of the pair of second rectification units 42b or a part of the pair of third rectification units 42c. As a result, the gas that has passed above the first passage hole 41a can be diffused upward at a position further away from the first passage hole 41a, so that the shielding gas is prevented from being caught in the gas flow. it can.

  In the first to fourth embodiments and the sixth embodiment described above, the case where the sputter shields 40, 340, 440, and 640 include the cover plates 43 and 343 has been described. The plates 43 and 343 may be omitted. Thereby, the component cost of a sputter | spatter shielding part can be suppressed.

  In the first to fourth embodiments and the sixth embodiment, the ends of the pair of rectifying plates 42, 342, 442, and 642 on one side in the extending direction are the ends of the shielding plate 41 on the upstream side in the gas injection direction. However, the present invention is not necessarily limited to this, and the nozzle unit 44 in at least one end in the extending direction of the pair of rectifying plates 42, 342, 442, and 642 is in the gas injection direction. What is necessary is just to be arrange | positioned in the injection direction of gas rather than the position corresponding to the jet nozzle 44a. Thereby, since the gas injected from the nozzle apparatus 44 can be guided by a pair of baffle plates 42, 342, 442, and 642, it can prevent that gas diffuses to a side.

  The “gas injection position by the nozzle device” in claim 2 corresponds to the position of the jet port 44 a of the nozzle device 44.

  In the first to fourth embodiments, the ends of the pair of rectifying plates 42, 342, and 442 on the other side in the extending direction are located at the ends of the shielding plate 41 on the downstream side in the gas injection direction. Although the case has been described, the present invention is not necessarily limited thereto, and the ends of the pair of rectifying plates 42, 342, and 442 on the other side in the extending direction are at least downstream of the first passage hole 41a in the gas injection direction. It only needs to be extended. Thereby, it can suppress that the gas flow velocity falls before the gas injected from the nozzle apparatus 44 passes above the 1st passage hole 41a.

  In the first embodiment, the height dimension from the shielding plate 41 of the first rectifying part 42a of the pair of rectifying plates 42 is higher than the height dimension from the shielding plate 41 of the second rectifying part 42b and the third rectifying part 42c. However, the present invention is not necessarily limited to this, and the height from the shielding plate 41 of the first rectifying unit 42a is not limited to this, but the shielding plate of the second rectifying unit 42b or the third rectifying unit 42c. It may be set equal to the height dimension from 41. If the heights of the first rectifying unit 42a, the second rectifying unit 42b, and the third rectifying unit 42c from the shielding plate 41 are all constant, the shape of the pair of rectifying plates 42 can be simplified, so the component cost Can be suppressed.

  In the first embodiment, the height of the pair of rectifying plates 42 from the shielding plate 41 of the first rectifying unit 42a is set to be constant in the extending direction of the first rectifying unit 42a, and the third rectification is performed. Although the case where the height dimension of the part 42c from the shielding plate 41 is set to be constant in the extending direction of the third rectification part 42c has been described, the present invention is not necessarily limited to this, and the first rectification part 42a is shielded. You may set so that the height dimension from the board 41 or the height dimension from the shielding board 41 of the 3rd rectification | straightening part 42c may become large gradually as it goes to the downstream from the injection direction of gas.

  When the height dimension of the first rectification unit 42a from the shielding plate 41 is set to gradually increase from the upstream side to the downstream side in the gas injection direction, the first rectification unit 42a is installed on the pair of first rectification units 42a. The lid plate 43 is disposed so as to be inclined upward from the upstream side in the gas injection direction toward the downstream side. Thereby, even if gas is ejected vigorously from the nozzle device 44, it is possible to prevent the atmosphere on the lower surface side of the shielding plate 41 from being caught in the flow of gas that has passed through the upper surface side of the shielding plate 41. It can reduce that shield gas is caught in a flow.

  In the fifth and sixth embodiments, the case where the discharge portion 545 has the bellows portion 545a has been described. However, the present invention is not limited to this, and the discharge portion extends along the axial direction in which the bellows portion 545a is omitted. It may be formed in a cylindrical shape that is curved or bent. Thereby, the structure of the discharge part 545 can be simplified and the manufacturing cost of a discharge part can be suppressed.

  In the fifth and sixth embodiments, the case where the discharge portion 545 is formed in a cylindrical shape has been described. However, the present invention is not limited to this, and the discharge portion 545 is formed in a substantially polygonal cross section. It may be formed in a shape.

100, 200, 500 Composite welding apparatus 20 Laser irradiation part 21 Condensing lens 22 Protective glass 30 Torch part 40, 340, 440, 540, 640 Sputter shield part 41 Shield plate 41a First passage holes 42, 342, 442, 642 Plate 542 Rectifier 43, 343 Cover plate 43a Second passage hole 44 Nozzle device 44a Spout 45 Inclined bottom 545 Discharge L Laser light w Base material

Claims (4)

Laser Oscillator for generating a laser beam, a condenser lens for irradiating the said laser beam generated from the laser oscillation device condenses in the welding position of the base material, and, between the welding position and its condenser lens A laser irradiator having a protective glass positioned therebetween;
Arc generating means for generating an arc between the base metal at the welding position irradiated with the laser light from the laser irradiation section, and a shielding gas for shielding the arc generated from the arc generating means from the atmosphere In a composite welding apparatus comprising a torch portion having a shielding gas injection means for injecting toward a base material,
A sputter shielding part disposed between the protective glass of the laser irradiation part and the welding position,
The sputter shield is
A plate-shaped shielding plate disposed along a direction intersecting with the irradiation direction of the laser beam and having a first passage hole through which the laser beam can pass;
A nozzle device that is disposed on the upper surface side of the shielding plate and that injects gas in a direction above the first passage hole and intersecting the laser light emitted from the condenser lens;
A pair of rectifying plates extending along the injection direction of the gas injected from the nozzle device and standing on the upper surface side of the shielding plate and sandwiching the first passage hole;
It has a second passage hole through which the laser beam can pass, and is installed on the pair of rectifying plates so that the second passage hole is disposed at a position corresponding to the first passage hole and faces the shielding plate. And a cover plate extending from the gas injection position by the nozzle device to at least the downstream side in the gas injection direction from the first passage hole of the shielding plate ,
The extension length dimension from the first passage hole of the shielding plate to the downstream side in the gas injection direction is longer than the extension length dimension from the second passage hole of the lid plate to the downstream side in the gas injection direction. Set larger,
The length of the pair of rectifying plates extending from the second passage hole to the downstream side in the gas injection direction is the length of the cover plate extending from the second passage hole to the downstream side in the gas injection direction. Set larger than the dimensions,
The pair of rectifying plates are at least in a portion located downstream of the first passage hole in the gas injection direction, so that the interval between the pair of rectifying plates is directed from the upstream side to the downstream side in the gas injection direction. A composite welding device characterized by its wide use.   In the sputter shielding unit, the facing distance between the pair of rectifying plates is set uniformly at a position exceeding at least the first passage hole of the shielding plate from the gas injection position by the nozzle device. The composite welding apparatus according to claim 1. The sputter shielding portion has a height dimension from a shielding plate of a portion of the pair of rectifying plates located downstream of the lid plate in the gas injection direction, and an interval between the lid plate and the shielding plate. The composite welding apparatus according to claim 1, wherein the composite welding apparatus is set to be larger. The sputter shielding portion is formed in a portion of the shielding plate that is located downstream of the first passage hole in the gas injection direction and at least between the pair of rectifying plates, and downstream of the gas injection direction. The composite welding apparatus according to any one of claims 1 to 3 , further comprising an inclined bottom portion that is inclined upward with respect to a horizontal plane toward the side.

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