JP2010036249A - Weld straightening apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a press-type weld straightening apparatus capable of suppressing generation of noise and dust, and easily straightening the weld distortion (deformation). <P>SOLUTION: The weld straightening apparatus comprises a truck having a flat loading unit (a rectangular plate) 11, a loading means mounted on the loading unit, and a pressing unit 20 which penetrates the loading part and is vertically movable. The pressing unit has a pair of casters 70 consisting of wheels on a lower end. The distortion of a welded object is straightened by moving the pair of casters in the direction of the weld line while a weld part is held and pressed against the object. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a welding strain relief device, and more particularly to a press-type welding strain relief device suitable for strain relief after butt welding when the object to be welded is an aluminum plate material or an aluminum mold material.

  Conventional methods for removing distortion after welding a member to be welded are roughly divided into a mechanical method and a heating method. In the mechanical method, distortion (deformation part) caused by welding is corrected by hitting with human power or a mechanical hammer. An example of such conventional distortion removal is described in Patent Document 1.

  In this patent document 1, a workpiece is placed on a lower bed, a cylinder support is provided so as to be movable in the front-rear direction across the lower bed, and an upper beam is attached to the cylinder support. A hydraulic cylinder is attached to the beam so that it can move left and right. Then, the workpiece is pressurized by moving the hydraulic cylinder in the vertical direction.

  Another conventional method for removing distortion after welding is described in Patent Document 2. In the publication described in this publication, a rectangular frame is arranged on a work to be distorted, and the plasma torch can be moved in the vertical and horizontal directions within the frame of the frame. The distance between the workpiece and the plasma torch is kept constant, and the workpiece is heated with the plasma torch under predetermined heating conditions.

JP-A-11-151600 JP 2006-205176 A

  By the way, if a metal hammer or jack used in a mechanical method is directly applied to an object to be distorted, the object may be damaged. Once scratches occur, the work of removing scratches using a grinder or the like increases, and it is necessary to take measures against noise (measured value of about 110 dB) and dust generated during the grinder operation. Furthermore, if the hammering method is used, it is necessary to take measures against noise (measured value of about 120 dB) during hammering. Even the thing of the said patent document 1 needs the countermeasure against the noise which generate | occur | produces at the time of a press. At the same time, the size of the apparatus is increased, making it difficult to apply it to small parts.

  On the other hand, when the heating method as described in Patent Document 2 is used, when the object is an aluminum alloy, it is sensitive to temperature changes, so the distance between the object and the plasma torch, the moving speed, and the like are accurately controlled. It is necessary and is not suitable for various small-scale production with different heating conditions. In particular, since the color does not change even when overheating occurs, the change in appearance is unclear, and as a result, depending on the type of aluminum alloy, the strength may be reduced, the crystal grains may be coarsened, and the corrosion resistance may be reduced. In addition, the apparatus is increased in size and cost, such as an apparatus for heating and an accurate distance setting.

  The present invention has been made in view of the above problems of the prior art, and an object thereof is to suppress generation of noise and dust and to easily correct welding distortion (deformation). Another object of the present invention is to correct welding distortion with a simple movable device.

  A feature of the present invention that achieves the above object is that the welding distortion removing device includes a carriage having a flat plate-shaped mounting portion, a load means mounted on the mounting portion, and a press capable of moving up and down through the mounting portion. The pressing portion has a pair of casters made of wheels at the lower end, and moves the welding cast in the welding line direction while pressing the pair of casters against the workpiece with the welding portion interposed therebetween. It is possible to take the distortion.

  And in this feature, a self-propelled means for self-propelling the carriage and a control means for controlling the self-propelled speed of the self-propelled means are mounted on the carriage, and the self-propelled means includes an electric motor and an inverter for driving the motor. And a chain and a chain sprocket that connect the electric motor and a rotating shaft attached to a wheel of the carriage. Moreover, it is preferable to attach a means for detecting distortion of the workpiece to be welded to the carriage, and to change the height of the pressing portion having the casters in accordance with the change in the amount of distortion.

  In the above feature, a caster meandering preventing means for preventing the caster from meandering is provided in the vicinity of the pressing portion, a peephole is formed in the mounting portion, and the welding portion is a pair of casters during self-running of this welding distortion removing device. It is preferable to make it possible to confirm that there is an intermediate point, and it is desirable that the control means included in the self-propelling means controls the self-propelling speed of the welding distortion removing device and switching between forward and reverse.

  According to the present invention, since the press-type welding distortion removing device can be self-propelled and the strain is forced by the weight of the device, noise and dust are generated at the time of distortion correction by butt welding of an aluminum plate or an aluminum mold. Can be suppressed, and welding distortion (deformation) can be easily corrected. Moreover, welding distortion can be corrected only by using a movable simple device.

  Hereinafter, an embodiment of a welding distortion removing apparatus according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of an embodiment of a press-type welding distortion removing device 100, and FIG. 2 is a side view of the press-type welding distortion removing device 100 shown in FIG. The main part is mounted on the carriage 25. That is, the handle portions 12 and 13 formed in a frame shape with square bars are attached to the longitudinal front and rear portions of the rectangular plate 11 on which the main components are mounted so as to widen the intervals as they go upward. The rectangular plate 11 and the handle portions 12 and 13 constitute the apparatus main body frame 10.

  Four wheels 55 and 56 that support the apparatus main body frame 10 are attached to the lower four corners of the rectangular plate 11. The two wheels 56 on the one handle portion 12 side are free to rotate via a bearing (not shown) so that the direction can be changed. The two wheels 55 on the other handle 13 side are drive wheels that are driven by the electric motor 50 placed on the rectangular plate 11.

  The two wheels 55 are attached to both ends of the same rotation shaft (not shown), and a chain sprocket is attached to the rotation shaft. A chain sprocket is also attached to the shaft end of the electric motor 50, and a transmission chain 57 is mounted on these two chain sprockets. In order to pass this transmission chain 57, a hole for a chain is formed in the rectangular plate 11. By operating the electric motor 50, the welding distortion removing device 100 can be self-propelled. The electric motor 50 is an inverter drive motor, and the inverter is accommodated in a control panel 40 placed on the rectangular plate 11. The inverter enables adjustment of the moving speed of the welding distortion removing device 100 and switching of the traveling direction (forward / backward).

  An entrainment prevention cover (not shown) is attached to the rotating portion of the electric motor 50 and the transmission chain 57 to prevent entrainment of foreign matters and the like. The crosspiece of one handle portion 12 is a handle 15 made of a pipe material, and moves the welding distortion removing device 100 in a pushing direction during normal use. A control box 60 is attached to the handle 15.

  The control box 60 is removable and can be transferred to the other handle 13. Therefore, the press-type welding distortion removing device 100 can be run in both the front and rear directions without changing the direction. During traveling, the vehicle is allowed to travel with the travel switch 62 of the control box 60 kept pressed. Therefore, if the traveling switch 62 is released, it stops and can cope with an unexpected situation.

  Next, details of the distortion removing portion directly related to distortion removal after welding will be described with reference to FIG. FIG. 3 is an enlarged perspective view of a pressing double wheel caster 70 disposed between the four wheels 55 and 56. As an example, the case of correcting distortion after butt welding an aluminum material having a thickness of 3 mm.

  On the rectangular plate 11, a weight 30 used for strain relief is placed adjacent to the control panel 40. A through screw hole is formed in a portion of the rectangular plate 11 between the place where the control panel 40 is placed and the place where the weight 30 is placed. A pressure twin wheel caster height adjusting screw 20 is inserted through the screw hole in the vertical direction.

  A circular handle 22 with a knob 24 is attached to the upper end of the pressurizing twin wheel caster height adjusting screw 20, and when the handle 22 is rotated, the pressurizing twin wheel caster height adjusting screw 20 and the aluminum plate 110 are rotated. The distance can be changed. A pressure twin wheel caster 70 is provided on the lower end side of the pressure twin wheel caster height adjusting screw 20. The pressure twin wheel caster 70 includes a plate member 26 attached to the lower end of the pressure twin wheel caster height adjusting screw 20, a stay 27 attached perpendicularly to the lower surface of the plate member 26, and a caster shaft 72 attached perpendicularly to the stay 27. And a caster 74 rotatably attached to both ends of the caster shaft 72.

  As an initial step, the distortion amount (deformation amount) of the welded portion 115 of the aluminum plate material 110 to be welded is measured using a measuring means such as a curved scale. A C-shaped steel pedestal 80 having a width of 70 mm, a length of 150 mm, and a thickness of 5 mm is disposed under the aluminum plate 110 whose strain (deformation) has been measured. When placing the cradle 80, the welded portion 115 of the aluminum plate 110 is positioned at the groove center of the C-shaped steel cradle 80. When the strain amount (deformation amount) and the thickness of the aluminum material 110 are greatly different, the size of the cradle 80 is changed according to the aluminum plate 110.

  Since the aluminum plate 110 is set on the cradle 80, the press-type welding distortion removing device 100 is set on the aluminum plate 110. At that time, the distance between the two casters 74 of the pressure twin-wheel caster 70 is set to 20 to 50 mm, and the press-type welding distortion removing device 100 is set so that the welded portion 115 is positioned between the two casters 74. To do.

  Here, since the rectangular observation window 18 is formed on the rectangular plate 11, it is possible to confirm the pressure twin wheel caster 70 and the welded portion 115 located below the rectangular plate 11 from the observation window 15. An operator who operates the welding distortion removing device 100 can move the handles 12 and 13 to see the welded portion while the welding distortion removing device 100 is running. It is not necessary to look under the plate 15 from front, back, left and right for positioning.

  After positioning the pressurizing twin wheel caster 70, the handle 22 of the pressurizing twin wheel caster height adjusting screw 20 inserted into the screw hole of the rectangular plate 15 is rotated, and the pressurizing twin wheel caster 70 is pushed down by 2 to 5 mm. A self-weight (500 kg) including the weight 30 mounted on the rectangular plate 15 is loaded on the pressurized twin wheel caster 70. The pressurized twin wheel caster 70 presses against distortion (deformed portion) caused by welding.

  Note that the welding strain relief device 100 is provided with a pressure twin wheel caster meandering prevention device 90 so that the pressure twin wheel caster 70 does not meander during the self-running of the welding strain relief device 100. This is due to the following reason. A vertically extending shaft is provided in the vicinity of the central portion of the rotary shaft of the pressure twin-wheel caster 70, and this shaft is a lower end portion of the height adjusting screw 20 and is connected to the height adjusting screw 20 via a bearing (not shown). Retained. Therefore, the pressure twin wheel caster 70 can freely rotate in the horizontal plane regardless of the rotation angle of the height adjusting screw 20.

  Although it is preferable that the movement of the pressure twin-wheel caster 70 is not influenced by the rotation of the height adjusting screw 20, as a result, the pressure twin-wheel caster 70 may meander. Therefore, a meandering prevention device 90 is provided. The meandering prevention device 90 includes two parallel bars 92 arranged vertically, and a pressing portion that presses the rotating shaft of the pressure twin wheel caster 70 at the lower end of the parallel bars 92 (not shown). . Since the pressing part restricts the movement of the rotating shaft of the pressure twin wheel caster 70, meandering is prevented. Note that the height of the vertical bar 92 is determined according to the distance that the plate member 26 moves by the rotation of the height adjusting screw 20.

  As described above, the welding distortion removing device 100 is positioned, and the welding distortion removing device 100 is moved forward or backward at a self-running speed of 2 to 5 m / min from the control box 60 attached to the handle portion 12. At the same time, the welded portion 115 is pressed using the pressure twin wheel caster 70 to correct the distortion (deformation). At this time, the generated noise was 66 dB or less as a measured value, dust was not generated, and an environment-friendly welding distortion removing device could be realized.

  As described above, according to the present embodiment, since a static load is applied to the welded portion, generation of noise and dust can be suppressed. In addition, since the strain relief device is small and simple, it is easy to remove strain and can easily cope with small parts. Furthermore, the place used for distortion removal can also be handled in a relatively narrow place.

1 is a perspective view of an embodiment of a press-type welding distortion removing device according to the present invention. The side view of the welding distortion removal apparatus shown in FIG. The partial expanded sectional view of the pressurization phase adjacent caster with which the welding distortion removal apparatus shown in FIG. 1 is provided.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Press-type welding distortion removal apparatus main body frame, 11 ... Rectangular plate (mounting part), 20 ... Pressurized twin wheel caster height adjustment screw, cart ... 25, 30 ... Weight, 40 ... Control panel, 50 ... Electric drive motor , 60 ... Control box, 70 ... Pressurized twin-wheel caster (pressing part), 80 ... Receiving base, 90 ... Preventing meandering of pressurized twin-wheel caster, 100 ... Press-type welding distortion removing device, 110 ... Aluminum plate (workpiece) 115 ... welded portion.

Claims (5)

  It has a cart having a plate-like mounting portion, a load means mounted on the mounting portion, and a pressing portion that penetrates the mounting portion and can move up and down, and the pressing portion includes a wheel at a lower end portion. A welding distortion removing device that has a pair of casters and allows the workpiece to be moved in the direction of the welding line while pressing the pair of casters against the workpiece to be welded with the welded portion interposed therebetween, thereby removing the distortion of the workpiece.   A self-propelled means for self-propelling the carriage and a control means for controlling the self-propelled speed of the self-propelled means are mounted on the carriage, and the self-propelled means includes an electric motor, an inverter that drives the motor, The welding distortion removing device according to claim 1, further comprising a chain and a chain sprocket that connect the electric motor and a rotating shaft attached to a wheel of the carriage.   3. A welding distortion remover according to claim 2, wherein means for detecting distortion of the workpiece due to welding is attached to the carriage, and the height of the pressing portion having the caster is changed in accordance with a change in the amount of distortion. apparatus.   A caster meandering preventing means for preventing the caster from meandering is provided in the vicinity of the pressing portion, a peephole is formed in the mounting portion, and the welding portion is between the pair of casters during the self-running of the welding distortion removing device. The welding distortion removing device according to claim 3, wherein it is possible to confirm that the welding distortion is present.   The welding distortion removing device according to claim 2, wherein the control means included in the self-propelling means controls the self-running speed of the welding distortion removing device and switching between forward and backward movements.

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