JP7740070B2 - Anode correction device and thickness adjusting member used in the device - Google Patents

Description

The present invention relates to an anode correction device for correcting distorted anodes, and a thickness adjustment member used in the device.

Electrolytic smelting is a method for producing high-purity metals. In electrolytic smelting, anodes (electrodes made of low-purity target metals or electrodes that do not dissolve in the electrolyte) and cathodes are alternately immersed in an electrolytic cell filled with electrolyte, and electricity is passed through them to electrodeposit high-purity metal onto the surface of the cathode seed plate, producing the product. The electricity-passing process (electrolysis process) in this type of electrolytic smelting consumes a large amount of electricity, so there is a need to reduce power consumption in order to improve the production efficiency of electrolytic smelting.

To reduce power consumption in electrolytic refining, the anode and cathode are positioned so that the distance between them is appropriate for electrodeposition. However, if the distance between the anode and cathode changes from the appropriate distance, the power consumption will change accordingly.

For example, if the distance between the anode and cathode is too large, the electrical resistance of the electrolyte increases, requiring more power for electrodeposition. On the other hand, if the distance between the anode and cathode is too small, power consumption can be reduced, but as electrodeposition progresses on the cathode seed plate, some of the electrodeposited metal may come into contact with the anode. If such contact occurs, current will flow directly from the anode to the cathode, resulting in wasted power. Therefore, in order to reduce power consumption and prevent wasted power, it is necessary to maintain an appropriate distance between the anode and cathode in the electrolytic cell.

Both the anode and cathode are held by bus bars and insulating plates, which are electrodes installed at the top of the electrolytic cell, and are suspended in the electrolytic cell. Therefore, the verticality of the two electrodes affects the distance between the anode and cathode in the electrolytic cell. In other words, since the vertical distortion of the two electrodes has an impact, it is important to minimize the distortion of the two electrodes.

The anode is manufactured by casting into the shape shown in Figure 5. That is, the anode A is cast as a single unit consisting of a main body B and a pair of ears C, C attached to both sides of the upper part of the main body B. The pair of ears C, C of the anode A function as supports when suspending the anode A while it is immersed in the electrolytic cell, and also as contact points with the bus bar. Therefore, to ensure good contact with the bus bar and to stably suspend the anode A, the lower parts of the pair of ears C, C are machined to be flat.

However, the mold used to cast anode A has a slight slope or step on the inner bottom surface of the mold to make it easier to strip the anode. As a result, the position of the pair of ears C, C of anode A is slightly offset in the thickness direction of anode A from the back side (the side that was in contact with the bottom of the mold) to the front side (the side facing the molten metal surface in the mold).

Specifically, as shown in Figure 6, the pair of lugs C, C of anode A are offset toward the surface side from the center line X, X' passing through the center of gravity G of the main body B of anode A (Figure 6(A)). Therefore, even if the lower portions of the pair of lugs C, C are machined flat, when anode A is inserted into an electrolytic cell, it swings around point P as a fulcrum and changes its position so that the plane including points P, P where the lugs contact the bus bar and the center of gravity G faces vertically (Figure 6(B)). In other words, anode A changes its position so that its surface is tilted relative to the vertical. As a result, when anode A is immersed in an electrolytic cell, the distance to the cathode of the lower end of the main body B of anode A on the surface side (left side in Figure 6) is shorter than that of the upper end, and the distance to the cathode of the back side (right side in Figure 6) is longer. In other words, even if the anode A is placed so that the distance to the cathode is appropriate at the top of the electrolytic cell and immersed in the cell, the distance between the anode A and the cathode at the bottom of main body B (i.e., main body B within the electrolytic cell) will be incorrect. This can result in contact between the anode A and the cathode as described above, potentially reducing the production efficiency of electrolytic refining.

Therefore, in order to correct the misalignment of the pair of ears C, C of the anode A, i.e., the misalignment with the center line X, X' passing through the center of gravity G of the main body B of the anode A, the anode A is press-formed (see, for example, Patent Documents 1 and 2).

Specifically, the pair of lugs C, C are pressed and bent toward the back side using a press process, and corrected so that point P, where the lugs contact the bus bar, overlaps center line X, X', which passes through the center of gravity G of the main body B of the anode A. By correcting in this way, when the anode A is inserted into the electrolytic cell, the plane containing points P, P, where the pair of lugs C, C contact the bus bar, and the center of gravity G can be oriented close to vertical. This effectively prevents the anode A from tilting when it is immersed in the electrolytic cell.

Japanese Patent Application Laid-Open No. 2017-122254 JP 2012-41612 A

As described above, when the pair of ears C, C of the anode A are pressed to appropriately adjust the position of the ears C, C, if the thickness of the pair of ears C, C changes, the amount by which the ears C, C are pressed must be changed. Therefore, it is necessary to adjust the amount of deformation of the ears C, C during press processing to match the thickness of the anode A (i.e., the thickness of the pair of ears C, C).

Conventionally, the amount of deformation of the pair of lugs C, C was adjusted by changing the thickness of the receiving die located on the back side. However, changing the thickness of the receiving die required removing and reinstalling the receiving die each time. Changing the receiving die takes approximately 25 to 30 minutes of work, and the equipment must be shut down while the receiving die is being changed. On days when the equipment is in operation, stopping the equipment for even 25 to 30 minutes has a significant impact on other processes, so receiving die changes are made on days when the equipment is not in operation. However, because the thickness of anode A, including the pair of lugs C, C, varies by approximately 5 mm or less depending on the day when anode A is manufactured, it is difficult to properly adjust the amount of deformation of the lugs C, C if the receiving die is changed only on days when the equipment is not in operation.

For example, Patent Document 1 discloses an apparatus for straightening anodes A used in electrolytic refining. Specifically, the anode straightening apparatus includes a reference block that contacts the back surface of the ear C of the anode A, and a pressure block that is movable toward and away from the reference block. The reference block includes a block body having a contact surface that faces the pressure block, and a thickness adjustment member that is detachably attached to the block body. The thickness adjustment member includes a contact member that is placed on the contact surface of the block body, a fixing portion that fixes the contact member to the block body, and a thickness adjustment member that is detachably attached to the block body. This type of anode straightening apparatus is advantageous because it allows for simple and quick correction of the ears of the anode without increasing the size or complexity of the equipment.

However, in the anode correction device disclosed in Patent Document 1, the thickness adjustment member has a complex shape including a contact member, an insert member, and a connecting member, and is detachably attached to the block body, but the fixing method is complicated as described below. Specifically, Patent Document 1 discloses that the thickness adjustment member "may be fixed to the block body 11 with a bolt or the like. For example, holes into which bolts or the like can be fixed are drilled in the top or side surface of the block body 11, and a fixing plate placed on the top or side surface of the block body 11 is provided as a fixing portion. The fixing plate is then provided with a through-hole through which the bolt or the like can be inserted" (paragraph [0047]), and further discloses that "the thickness adjustment member 12 can be fixed to the block body 11 by inserting a bolt or the like through the through-hole in the contact member 12a and then inserting the bolt or the like into the hole in the block body 11" (paragraph [0048]). Therefore, when such a thickness adjustment member is fixed, in order to remove it, at least the bolt must be removed from the through-hole in the contact member, and the work of loosening the bolt and holding the thickness adjustment member after removal must be carried out simultaneously, which poses a problem in terms of safety, making it difficult for a worker to perform this task alone.

Patent Document 2 also discloses a technology for correcting the verticality of anodes, which automates the process and shortens the time required for correcting the verticality. Specifically, the technology uses a verticality measuring device that includes a verticality measuring device that measures data related to the verticality of the anode, and a lug verticality press that presses the lug receiving portion on which the anode lug is placed, thereby correcting the angle of the backside of the lug that is suspended and supported in the electrolytic cell. Based on the measurement data from the verticality measuring device, the technology discloses a technology for adjusting the angle of the lug receiving portion to an angle that corrects the verticality.

However, this requires equipment such as a perpendicularity measuring device, a control unit, and a drive mechanism, which increases the size and cost of the equipment.

The present invention was proposed in light of these circumstances, and aims to provide technology that enables a single worker to safely, easily, and quickly correct the anode ears without increasing the size and complexity of the equipment.

After extensive research, the inventor discovered that the above-mentioned problems could be solved by using a thickness adjustment member with a specified notch formed in it to adjust the thickness of the reference block in an anode correction device that clamps the workpiece between a reference block and a pressure block for pressure correction, and thus completed the present invention.

(1) The first aspect of the present invention is an anode correction device for use in electrolytic refining, comprising a reference block that contacts the rear surface of the anode's lug and a pressure block that is movable toward and away from the reference block. The reference block has a contact surface that faces the pressure block and is equipped with a block body that is fixed with bolts to an equipment frame located on the opposite side of the contact surface. The anode correction device also includes a thickness adjustment member that is detachably inserted between the block body and the equipment frame. The thickness adjustment member has a notch formed in the height direction from its lower end, and is inserted and fixed by passing the bolt that secures the block body through the notch.

(2) The second aspect of the present invention is an anode correction device according to the first aspect, wherein the block body is fixed to the device frame with two or more bolts, and the thickness adjustment member has a number of notches formed corresponding to the number of bolts.

(3) The third aspect of the present invention is a thickness adjustment member for use in equipment for correcting anodes used in electrolytic refining. The equipment is composed of a reference block that contacts the rear surface of the anode's ear and a pressure block that is movable toward and away from the reference block. The reference block in the equipment has a contact surface that faces the pressure block and a block body that is fixed with a bolt to an equipment frame located on the opposite side of the contact surface. The thickness adjustment member has a predetermined thickness and has a notch formed in the height direction from its lower end. The thickness adjustment member is fixed by inserting the bolt between the block body and the equipment frame into the notch.

This invention allows a single worker to safely, easily, and quickly correct the anode ears without increasing the size and complexity of the equipment.

FIG. 2 is a side view of a main part of the anode correction device. FIG. 2 is a cross-sectional view of a main part of an anode correction device. 5A and 5B are diagrams illustrating an example of the configuration of a thickness adjusting member. FIG. 1 is a process diagram showing an example of the flow of an anode correction method. FIG. 2 is a diagram showing the configuration of an anode. 10 is an explanatory diagram showing the relationship between the center of gravity G of the anode body and the position P where the ear contacts the bus bar or the like. FIG.

A specific embodiment of the present invention (hereinafter referred to as "the present embodiment") will be described below. Note that the present invention is not limited to the following embodiment, and various modifications are possible within the scope of the gist of the present invention.

≪1. About anode orthodontic devices≫
The anode straightening device according to this embodiment is a device for straightening an anode used in electrolytic refining, and is a device for straightening distortions that occur during casting, for example, by pressing the ears of the anode.

Figure 1 is a side view of the main parts of an anode correction device according to this embodiment. Figure 2 is a cross-sectional view of the main parts of the anode correction device. Figures 1 and 2 show the anode correction device in use with an anode A to be corrected installed. Note that in Figures 1 and 2, the anode to be corrected is indicated by the symbol "A." Anode A comprises a main body B and a pair of ears C, C. Anode A is suspended from an electrolytic cell by the pair of ears C, C, and in that state is immersed in the electrolyte in the electrolytic cell for electrolytic refining.

Specifically, the anode correction device 1 is composed of an anode holder 11 that holds the anode A, a reference block 12 that contacts the backside of the ears C, C of the anode A, and a pressure block 13 that is movable toward and away from the reference block 12. The reference block 12 also has a block body 21 that has a contact surface facing the pressure block 13 and is fixed with bolts 14 to the device frame 1F located on the opposite side of the contact surface, and a thickness adjustment member 22 that is detachably inserted between the block body 21 and the device frame 1F.

In the anode correction device 1, the anode A is held by the anode holder 11, and the reference block 12 and pressure block 13 are arranged to sandwich the anode A. Specifically, the reference block 12 is arranged on the back side of the anode A (the right side in Figure 1, the upper side in Figure 2), and the pressure block 13 is arranged on the front side of the anode A (the left side in Figure 1, the lower side in Figure 2). The pressure block moving mechanism 15 then moves the pressure block 13 toward and away from the reference block 12.

In this way, by moving the pressure block 13 toward the reference block 12, the pressure block 13 presses the pair of ears C, C of the anode A toward the reference block 12. The pair of ears C, C are then clamped between the pressure block 13 and the reference block 12, and are corrected.

[Anode holding part]
The anode holder 11 suspends and holds the anode A. A pair of lugs C, C of the anode A to be corrected are placed on the upper surface of the anode holder 11, which suspends and holds the anode A. The structure of the anode holder 11 is not particularly limited as long as it can hold the anode A, and can be configured, for example, by a rod-shaped member installed so that the upper surface is horizontal. Alternatively, the anode holder 11 may be configured to be supported by a U-shaped member or a mechanism such as a vice.

In the anode correction device 1, the anode A is held by the anode holder 11, and the reference block 12 and pressure block 13 (described below) are positioned to sandwich the anode A.

[Reference block]
As described above, the reference block 12 includes a block body 21 that has a contact surface facing the pressure block 13 and is fixed with bolts 14 to the device frame 1F located on the opposite side of the contact surface, and a thickness adjustment member 22 that is detachably inserted between the block body 21 and the device frame 1F. The thickness adjustment member 22 can be freely attached and detached to adjust the thickness of the reference block 12, i.e., the amount of deformation when the pressure block 13 presses the pair of ears C, C.

(Block body)
The block body 21 constitutes the reference block 12 and has a contact surface facing the pressurizing block 13. The "contact surface" of the block body 21 is the surface facing the pressurizing block 13 and coming into contact with the anode A sandwiched between the block body 21 and the pressurizing block 13.

As shown in Figures 1 and 2, the block body 21 is a roughly rectangular parallelepiped block. The back surface (the surface opposite the contact surface) of the block body 21 is fixed to the device frame 1F so that its front surface (i.e., the surface (contact surface) facing the pressure block 13) is roughly parallel to the surface (pressure surface) of the pressure block 13.

Here, the block body 21 is fixed to the device frame 1F, which is located on the opposite side from the contact surface described above, by bolts 14. Specifically, bolts 14 are installed perpendicular to the respective faces of the device frame 1F and the block body 21, bridging the gap between the device frame 1F and the block body 21, thereby fixing the block body 21 to the device frame 1F.

The number of bolts 14 is not particularly limited, but two or more is preferable. Furthermore, it is preferable that two or more bolts 14 are arranged horizontally at a predetermined interval.

(Thickness adjusting member)
The thickness adjustment member 22 is removably inserted and attached between the block main body 21 and the device frame 1F, and is intended to adjust the thickness of the reference block 12 composed of the block main body 21 and the thickness adjustment member 22.

Figure 3 shows an example of the configuration of the thickness adjustment member 22, and mainly shows a front view of the thickness adjustment member 22, as well as a plan view, right side view, and bottom view. As shown in Figure 3, the thickness adjustment member 22 is plate-shaped and has a predetermined thickness. In the anode correction device 1, a set of multiple thickness adjustment members 22 with different thicknesses is prepared, and thickness adjustment members 22 of various thicknesses can be selected and used depending on the degree of deformation (degree of distortion) of the anode A to be corrected.

As described above, the thickness adjustment member 22 is removably inserted and attached between the block main body 21 and the device frame 1F. By selecting and using an appropriate thickness adjustment member 22 depending on the amount of deformation of the anode A, the thickness of the reference block 12 can be freely changed. This makes it possible to adjust the amount of deformation of the ear portion C of the anode A, which is clamped between the reference block 12 and the pressure block 13 and pressurized for correction, simply by changing the thickness adjustment member 22 to one with the appropriate thickness. This makes it possible to easily and quickly adjust the amount of deformation of the ear portion C.

As shown in Figure 3, the thickness adjustment member 22 has a notch 22N formed in the height direction from the bottom end. The thickness adjustment member 22 is fixed by inserting the bolt 14 that secures the block body 21 to the device frame 1F into the notch 22N.

A thickness adjustment member 22 with this shape can be easily attached between the device frame 1F and the block main body 21 by inserting the thickness adjustment member 22 from above so that the notch 22N is aligned with the installation position of the bolt 14. Furthermore, because the thickness adjustment member 22 is attached so that the bolt 14 is clamped between the notch 22N, it hardly moves left or right even during press processing, allowing it to be held stably.

Furthermore, removing the thickness adjustment member 22, which is attached between the device frame 1F and the block main body 21, can be done with the extremely simple task of simply pulling it out upward. Therefore, selecting an appropriate thickness adjustment member 22 depending on the amount of deformation of the anode A to be corrected can be done in a short amount of time, and the accuracy of selecting an appropriate thickness adjustment member 22 can be improved. This in turn increases the accuracy of the correction of the anode A.

In the past (e.g., the technology of Patent Document 1), thickness adjustment members were fixed to the block body by bolting. However, when straightening an anode A, it was necessary to select and replace an appropriate thickness adjustment member to adjust the amount of deformation, and the thickness adjustment member had to be bolted each time, making it an extremely cumbersome task for a single worker. In contrast, the thickness adjustment member 22 in the anode straightening device 1 of this embodiment, as described above, does not require operations such as bolting, can be stably fixed and attached, and can be easily removed during replacement, allowing a single worker to perform the work safely, easily, and quickly.

The shape of the notch 22N in the thickness adjustment member 22 is not particularly limited; it need only be of a size and shape that allows the bolt 14 to pass through. If the widthwise size of the notch 22N is too large compared to the diameter of the bolt 14 (the diameter of the circumscribed circle), stability may be compromised when the thickness adjustment member 22 is attached. Therefore, it is preferable that the widthwise size be slightly larger than the diameter of the bolt. In Figure 3, the dashed line portion of the notch 22N indicates the cross-sectional shape of the bolt 14.

The number of notches 22N preferably corresponds to the number of bolts 14 between the device frame 1F and the block body 21, and is preferably two or more. Stability can be increased by forming two or more notches 22N and attaching the bolts 14 so that they are clamped between the respective notches 22N. Note that Figure 3 shows an example in which two notches 22N are formed corresponding to two bolts 14.

≪2. About the anode correction method≫
Next, a description will be given of a method for straightening an anode using the above-described anode straightening device 1. As described above, the anode straightening method is a method for straightening an anode A that has been distorted during casting by applying pressure thereto.

Specifically, as shown in Figure 4, the anode correction method comprises a preliminary correction step S1 and a main correction step S2. The preliminary correction step S1 also includes an anode selection step S11 for selecting the anode A to be corrected, a preliminary correction step S12 for performing preliminary correction on the selected anode A, and a thickness adjustment member selection step S13 for selecting a thickness adjustment member 22 based on the results of the preliminary correction.

[Preliminary correction process]
The preliminary straightening step S1 is a step of measuring the degree of distortion of the anode A to be straightened prior to the main straightening (S2) and selecting and determining an appropriate thickness adjusting member 22 to be used in the straightening work using the anode straightening device 1.

As described above, the thickness of the reference block 12 can be freely changed by selecting and using an appropriate thickness adjustment member 22 depending on the amount of deformation of the anode A, thereby adjusting the amount of deformation of the ear portion C of the anode A that is clamped between the reference block 12 and the pressure block 13 and pressurized for correction. Thus, selecting an appropriate thickness adjustment member 22 is an important task when correcting the anode A, and also leads to improved correction accuracy.

(Anode Selection Step)
In the preliminary straightening step S1, first, anodes A to be straightened are selected. Specifically, from among anodes A obtained in the same anode casting lot (cast using the same molten metal), a plurality of anodes A that are visually checked to be free of abnormalities such as bulging or warping are selected.

(Preliminary straightening process)
Next, preliminary straightening is performed on the selected anodes A using the anode straightening device 1. At this time, the thickness of the thickness adjusting members 22 is changed by the number of selected anodes A, and the preliminary straightening work is performed using each thickness adjusting member 22.

(Thickness adjusting member selection process)
Then, based on the straightening results of the anodes A straightened by the preliminary straightening operation, a thickness adjusting member 22 with an appropriate thickness is selected. Specifically, each of the anodes A that have been pre-straightened (straightened) is suspended in an electrolytic bath, and the perpendicularity is evaluated using a predetermined measuring jig. In other words, the straightening effect of the preliminary straightening is evaluated. Note that the method for evaluating the perpendicularity of the anodes A is not particularly limited.

This allows the anode A with the best verticality to be identified among the multiple anodes A that have undergone preliminary straightening, and the thickness adjustment member 22 used to straighten that anode A is selected as the thickness adjustment member 22 to be used for the main straightening of anodes A from the same lot.

In the preliminary straightening step S1, preliminary straightening is performed on multiple selected anodes A using thickness adjustment members 22 of different thicknesses. According to the anode straightening device 1, the thickness adjustment members 22 have notches formed in the height direction from the lower end, and are fixed by inserting and fastening the bolts 14 that secure the block body 21 and device frame 1F through the notches. This makes attachment and detachment extremely simple and quick.

This allows preliminary correction to be performed efficiently without taking a long time, even when correcting multiple anodes A using thickness adjustment members 22 of different thicknesses. Furthermore, because preliminary correction can be performed with such simple operations, the accuracy of selecting the appropriate thickness adjustment member 22 can be improved.

[Main correction process]
In the main correction step S2, the main correction is performed on the anodes A from the same lot as the anodes A targeted in the preliminary correction, using the thickness adjusting member 22 having the predetermined thickness selected in the preliminary correction step S1.

In this final straightening, an appropriate thickness adjustment member 22 is selected in the preliminary straightening step S1, so that the ear C of the distorted anode A can be pressurized and straightened with the appropriate amount of deformation, allowing for highly accurate straightening.

The present invention will be explained in more detail below using examples, but the present invention is not limited to these examples in any way.

[Example 1]
In Example 1, the anode A was corrected using the anode correction device 1 equipped with the thickness adjusting member 22 shown in FIGS.

As a result, replacing five thickness adjustment members 22 to adjust the amount of deformation during anode straightening work could be done safely and quickly by a single worker (5-10 minutes per replacement).

[Comparative Example 1]
In Comparative Example 1, unlike Example 1, the anode A was corrected using an anode correcting device in which the thickness adjusting member was fixed by bolting.

As a result, replacing one thickness adjustment member to adjust the amount of deformation during the anode straightening work took more than 20 minutes, so the work was halted.

[Example 2]
In Example 2, when performing the correction work of the anode A using the anode correction device 1 equipped with the thickness adjusting member 22 shown in Figures 1 to 3, a series of anode correction methods was carried out, which consisted of a preliminary correction step (S1) for selecting the thickness adjusting member 22 and a main correction step (S2).

Specifically, in the preliminary straightening step S1, five anodes A from the same lot were first selected. Next, thickness adjustment members 22 of different thicknesses (five types shown in Table 1 below; a thickness of 0.0 mm means that no thickness adjustment member was used) were prepared for each of the five selected anodes A, and preliminary straightening was performed. The anode straightening device 1 was used for the preliminary straightening. The perpendicularity of each of the five anodes A after preliminary straightening was then measured, thereby evaluating the straightening effect of the preliminary straightening.

Table 1 below shows the results of measuring the perpendicularity of five pre-straightened anodes A. The perpendicularity was evaluated by measuring the distortion (absolute value) at nine points on the main body of each anode A after pre-straightening, and Table 1 shows the average absolute distortion value.

As shown in Table 1, the straightening operation using a thickness adjustment member 22 with a thickness of 1.0 mm resulted in the least distortion of anode A after straightening. Therefore, it was decided to use a thickness adjustment member 22 with a thickness of 1.0 mm when straightening anode A of this lot using the anode straightening device 1.

Next, in step S2 of the main correction, a thickness adjustment member 22 with a thickness of 1.0 mm was used to perform the main correction on anodes A (50 pieces) from the same lot.

As a result, the absolute distortion value for all anodes A after this straightening was within 1.5 mm, enabling effective straightening and improving the accuracy of the straightening. Furthermore, since re-straightening was no longer necessary, the overall time required for the straightening process was reduced.

REFERENCE SIGNS LIST 1 anode correction device 1F device frame 11 anode holding portion 12 reference block 21 block body 22 thickness adjusting member 22N notch 13 pressure block 14 bolt 15 pressure block moving mechanism

Claims (3)

1. An apparatus for correcting an anode used in electrolytic smelting, comprising:
a reference block that contacts the rear surface of the ear of the anode;
a pressure block provided so as to be movable toward and away from the reference block,
The reference block is
a block body having a contact surface facing the pressurizing block and fixed with bolts to an apparatus frame located on the opposite side of the contact surface;
a thickness adjusting member detachably inserted between the block body and the device frame,
The thickness adjusting member has a notch formed in the height direction from its lower end, and the bolt that fixes the block body is inserted and fixed into the notch.
Anode straightening device. the block body is fixed to the device frame by two or more bolts;
The thickness adjusting member has notches formed in a number corresponding to the number of the bolts.
The anode straightening device of claim 1 . A thickness adjusting member for an apparatus for correcting an anode used in electrolytic refining, comprising:
The device comprises:
The anode pressure sensor includes a reference block that contacts the rear surface of the ear portion of the anode, and a pressure block that is provided so as to be able to approach and move away from the reference block.
The reference block in the device is
a block body having a contact surface facing the pressure block and fixed with bolts to an apparatus frame located on the opposite side of the contact surface;
The thickness adjusting member has a predetermined thickness, and a notch is formed in the height direction from the lower end thereof, and the bolt between the block body and the device frame is inserted and fixed into the notch.
Thickness adjustment member.