JP3699164B2 - Modified carrier bar - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a carrier bar used for surface treatment of an aluminum extrusion mold material.
[0002]
[Prior art]
As shown in FIGS. 1 and 2, the carrier bar is provided with power feeding portions B at both ends, and support brackets C are suspended from the body a at appropriate intervals, and the electrode bars D (also referred to as conductive bars) are supported by the support brackets C. Horizontally supported, a hanging metal fitting E (also called a hanger) is suspended from the electrode rod D, the end of the extrusion mold material F is held by the hanging metal fitting E, the extrusion mold material F is vertically suspended, and a degreasing tank, a water washing tank, It is sequentially conveyed to a surface treatment tank G such as an electrolytic tank, and immersed in the treatment liquid W of each treatment tank G to produce an anodized film or a colored film. (For example, JP-B 52-43703, JP-B 54-5597, JP-B 55-36581)
[0003]
The carrier bar has a total length of about 10 to 11m, has power supply parts at both ends installed in the processing tank, and suspends the extrusion mold material from the body via metal fittings. The total suspended weight reaches about 900kg. Therefore, the carrier bar bends downward due to its weight. That is, a minus camber with a ratio δ / L of the maximum deflection δ at the time of loading with respect to the span L occurs.
In anticipation of this minus camber, the carrier bar is curved upward in advance, and is set as a plastic scan bar (a state curved upward from the horizontal state) as shown in FIG. 3, and the mounting brackets are attached to the carrier bar. When the extrusion mold material is suspended, the carrier bar is made substantially horizontal, and each extrusion mold material suspended on the carrier bar sinks evenly in the liquid in the surface treatment tank and is not exposed from the liquid surface. There are few parts (not used), and metal fittings are kept from touching the liquid level.
[0004]
On the other hand, when welding is performed on metal, due to thermal expansion due to rapid temperature rise and thermal contraction accompanying cooling, welding distortion (also referred to as welding deformation) of inner surface shrinkage deformation (α) and outer surface deflection deformation (β) occurs. It is known to occur.
As shrinkage deformation (α) of the inner surface due to welding, (a1) transverse shrinkage in the direction perpendicular to the weld line, (a2) longitudinal shrinkage in the weld line direction, (a3) the interval increases or decreases as welding progresses at the butt joint. Rotational deformation is known.
As bending deformation (β) of the outer surface due to welding, (b1) When the temperature distribution during welding is not uniform in the thickness direction, lateral bending (angular deformation) deformation that makes the plate bend at the weld line, (b2) Curved longitudinal bending deformation in the weld line direction, (b3) Buckling deformation in which the plate buckles due to compressive thermal stress due to welding of the thin plate, and (b4) Twist that occurs in the spiral around the neutral axis Deformation is known.
[0005]
[Problems to be solved by the invention]
Even in the carrier bar of the plastic bar, suspending or removing the extrusion mold material or the like from the carrier bar is equivalent to repeatedly applying a load to the carrier bar, which causes the carrier bar to fatigue, It becomes a minus camber as shown in FIG. If the carrier bar becomes a negative camber, the submerged submerged parts of the extrusion mold materials are uneven, and there is a problem that the number of non-treatment parts (not used) increases, and the metal fittings touch the liquid surface. There was also a problem that was damaged.
The metal bars were removed from the carrier bar which became a minus camber, and it was made naked as shown in FIG. 9 and returned to its original state with a press or the like. Because of the distortion, there was a problem that it became a negative camber again in a short time.
[0006]
Although it is possible to replace the minus camber carrier bar with a new one, there is a problem that it is uneconomical because the carrier bar is expensive.
Accordingly, the present invention has been made in view of such problems of the prior art, and an object of the present invention is to provide a corrected carrier bar in which a minus camber is easily and inexpensively corrected. There is.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the modified carrier bar according to the present invention is a carrier bar used for surface treatment of an aluminum extrusion mold material. It is provided in the direction and is corrected to the plastic scan bar using the thermal contraction of the metal by welding, or a reinforcing material is attached by welding to the lower surface of the carrier bar of the minus camber that is curved downward and corrected to the plastic scan bar. .
Since the camber is corrected by utilizing the metal shrinkage caused by welding, the minus camber is distorted and can be reused for a long time.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
First, the first embodiment of the modified carrier bar according to the present invention will be described with reference to FIGS. 5 and 6. The feeder B and the support bracket C attached to the carrier bar 1 of the minus camber curved downward are removed, and the support bracket is removed. After removing the electrode rod D and the hanging metal fitting E by removing C, the build-up 3 by welding is applied to the lower surface 2a of the body portion 1 of the carrier bar 1 curved downward, that is, on the convex side of the body portion 2. It is provided in the longitudinal direction of the bar 1 and corrected to a plastic bar by utilizing the heat shrinkage of the metal due to welding.
[0009]
【Example】
When providing a single overlay 3 by welding, it is provided at the center of the lower surface 2a of the trunk, and when two overlays 3 are provided, it is provided on the left and right sides of the trunk 2. When two or more overlays 3 are provided, it is desirable to provide each overlay 3 at equal intervals.
The build-up range h and the build-up amount by welding are adjusted according to the minus camber of the carrier bar 1. Or increase the amount of overlay and further combine these requirements.
The overlay 3 with respect to the carrier bar 1 is provided at the center of the carrier bar 1, and the overlay range h is preferably within 1/2 of the span L.
[0010]
Next, a second embodiment of the modified carrier bar according to the present invention will be described with reference to FIGS. 7 and 8. The reinforcing material 4 is welded in the longitudinal direction of the carrier bar 1 and corrected to a plastic bar using the heat shrinkage of the metal by welding, and the body 2 is reinforced by the welded reinforcing material 4. is there.
[0011]
【Example】
As the reinforcing material 4 to be attached to the carrier bar 1, for example, an electrically conductive aluminum alloy or steel material is used, and the shape of the reinforcing material 4 is preferably a plate shape, an angle shape, a groove shape, a channel shape, etc. A plurality of materials 4 are welded.
As a means for welding the reinforcing material 4, for example, the periphery of the reinforcing material 4 is welded to the trunk lower surface 2a, and the welding range is equivalent to the overlay 3 of the invention.
When the welding overlay 3 is provided on the carrier bar 1 or the reinforcing material 4 is welded, the support fittings C attached to the barrel 2 must be removed, but provided at both ends of the barrel 2. It is not necessary to cut off the feeding part B.
[0012]
【The invention's effect】
Since the corrected carrier bar according to the present invention has the above structure, the following effects can be obtained.
Because it is appropriate to provide weld overlay on the underside of the carrier bar of the negative camber that is bent downward, or to weld a reinforcing material, and to correct the plastic camber using the heat shrinkage of the metal due to the weld The distortion caused by the minus camber is removed, and it can be reused for a long time.
[0013]
Further, if there is a welding equipment and welding technique, the correction can be made, so that the camber can be corrected extremely easily and inexpensively. In particular, in the modified carrier bar for welding the reinforcing material, the carrier bar is reinforced by the welded reinforcing material, so that the reuse period is further extended.
Furthermore, since welding overlay is provided on the lower surface of the carrier bar or a reinforcing material is welded, there is no hindrance to the mounting of the support fittings, and there is no hindrance to the power feeding portion.
[Brief description of the drawings]
FIG. 1 is a front view showing a surface treatment state of an aluminum extrusion mold material.
FIGS. 2A and 2B are a front view and a cross-sectional view of a main part showing an example of use of a carrier bar.
FIG. 3 is a front view showing an erection example in a no-load state of a carrier bar.
FIG. 4 is a front view showing an erection example in a minus camber state of a carrier bar.
FIGS. 5A, 5B, and 5C are front views showing examples of correction carrier bar correction steps in the present invention. FIGS.
FIGS. 6A, 6B, and 6C are cross-sectional views showing an example of overlaying by welding.
FIGS. 7A, 7B, and 7C are front views showing an example of a correction process for a modified carrier bar of the present invention using a reinforcing material.
FIGS. 8A, 8B, and 8C are cross-sectional views illustrating examples of welding of a reinforcing material. FIGS.
FIG. 9 is a front view showing an example of camber correction of a conventional carrier bar.
[Explanation of symbols]
1, A Carrier bar 2, a trunk part, 2a trunk bottom surface 3 overlay 4 reinforcing material H treatment tank width, h overlay range, T trunk width, L carrier bar span B feeding part, C bearing bracket, D Electrode rod, E Suspension fitting F Extrusion mold G Treatment tank, W Treatment liquid

Claims (2)

In the carrier bar (1) used for the surface treatment of the aluminum extrusion mold (F), the build-up (3) by welding is applied in the longitudinal direction of the carrier bar (1) to the carrier bar lower surface (2a) of the minus camber which is curved and deformed downward. A correction carrier bar, which is provided in the above and corrected to a plastic bar by utilizing the thermal contraction of metal by welding. In the carrier bar (1) used for the surface treatment of the aluminum extrusion mold material (F), the reinforcing material (4) is attached by welding to the carrier bar lower surface (2a) of the minus camber that is curved downward and corrected to a plastic bar. A modified carrier bar characterized by that.

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