A passivation device and a zinc plating process thereof

Abstract

This application relates to a passivation device, which includes a passivation tank, a frame, and a drum. A limiting post is provided on the drum, and a slider slides up and down on the limiting post. A stirring rod is hinged to the slider, and a stirring rod is hinged to the limiting post. An elastic element is provided on the limiting post, and a positioning component is provided on the stirring rod. After a workpiece is placed into the receiving tank, the slider is moved so that the hinged portions of the stirring rods extend away from the limiting post. When the drum rotates, the extended portions of the stirring rods agitate the workpiece in the receiving tank, thereby separating the adhered workpieces and improving the passivation effect. When the drum is not in use, the positioning state of the slider is released. Under the action of the elastic element, the slider moves the hinged portions of the stirring rods closer to the limiting post, reducing the risk of damage to the stirring rods due to impact when the workpiece is poured in.

Description

Technical Field

[0001] This application relates to the field of zinc plating processes, and more particularly to a passivation apparatus and its barrel zinc plating process. Background Technology

[0002] Zinc plating is a surface treatment technique that involves coating the surface of metals, alloys, or other materials with a layer of zinc for aesthetic purposes, rust prevention, and other functions. Because the surface is coated with the reactive metal zinc, the workpiece is easily oxidized in the air. Therefore, after zinc plating, the workpiece needs to be passivated to improve its corrosion resistance.

[0003] In related technologies, a zinc plating passivation device, such as Figure 1 As shown, it includes a passivation tank 1, a frame 2 and a roller 3. The roller 3 is located in the passivation tank 1 and is rotatably connected to the frame 2. The frame 2 is provided with a drive component 4 for driving the roller 3 to rotate. The roller 3 is provided with a receiving groove 31. The outer peripheral wall of the roller 3 is provided with several through holes 32, and the several through holes 32 are all connected to the receiving groove 31.

[0004] In actual use, when the above-mentioned galvanizing passivation equipment is used, the workpieces may come into contact with each other during the rotation of the drum. This prevents the passivation liquid from entering the contacted workpieces to passivate the contact surfaces, resulting in incomplete passivation of certain parts of the tool and affecting the quality of the workpieces. This issue needs to be improved. Summary of the Invention

[0005] To address the issue that during the rotation of the drum, workpieces may come into contact with each other, preventing the passivating solution from penetrating the contact surfaces and thus causing incomplete passivation of certain parts of the tool and affecting workpiece quality, this application provides a passivation device and its drum zinc plating process.

[0006] This application provides a passivation device and its barrel zinc plating process, which adopts the following technical solution:

[0007] In a first aspect, this application provides a passivation device, which adopts the following technical solution:

[0008] A passivation device includes a passivation groove, a frame, and a roller rotatably connected to the frame. The frame is equipped with a drive member for rotating the roller. The roller has a receiving groove and several through holes on its outer side wall, which communicate with the receiving groove. A limiting post is provided on the roller, located within the receiving groove. A slider slides on the limiting post, and a stirring rod is hinged to the slider. A second stirring rod is hinged to the limiting post, located on the side of the first stirring rod away from the slider, and the two stirring rods are hinged together. An elastic element is provided on the limiting post, which pulls the first stirring rod tight, causing the slider to tend to move away from the second stirring rod. A positioning component is provided on the second stirring rod for positioning.

[0009] By adopting the above technical solution, after the workpiece is put into the receiving tank two, the slider is moved close to the stirring rod two and positioned so that the hinged part of the stirring rod one and the stirring rod two extends away from the limiting post. When the drum rotates, the extended parts of the stirring rod one and the stirring rod two agitate the workpiece in the receiving tank two, thereby separating the attached workpieces so that the passivation liquid can fully wet the surface of the workpiece, making the passivation of the workpiece more uniform and thorough, improving the passivation effect of the workpiece, and thus helping to improve the quality of the produced workpiece.

[0010] When the roller is not in use, the slider is released from its positioning state. Under the action of the elastic element, the slider moves the hinged part of the stirring rod 1 and stirring rod 2 closer to the limiting post. When the workpiece is poured into the receiving tank 2, the impact of the workpiece on the stirring rod 1 and stirring rod 2 can be reduced, which can reduce the damage to the stirring rod 1 and stirring rod 2 and help extend the service life of the stirring rod 1 and stirring rod 2.

[0011] Optionally, the positioning assembly includes an adjusting block disposed on the hinge shaft of the first stirring rod and the second stirring rod, a positioning block slidably connected to the second roller, and an elastic element two disposed on the second roller. The positioning block is located below the adjusting block and within the receiving groove two, and the positioning block slides closer to or away from the limiting post. The adjusting block has a positioning hole through which the positioning block passes, and the positioning block has a limiting groove for the adjusting block to engage. The elastic element two pulls the positioning block tight, so that the positioning block abuts against the inner wall of the receiving groove two.

[0012] By adopting the above technical solution, after the workpiece is put into the receiving tank two, the slider is moved closer to the stirring rod two, and at the same time the positioning block is moved closer to the limiting post, so that the positioning hole and the positioning block are aligned. When the positioning block passes through the positioning hole and the adjusting block and the limiting groove are aligned, the positioning block is released. The positioning block moves under the action of the elastic element two, so that the adjusting block is stuck in the limiting groove. The positioning block is positioned by pressing against the inner wall of the receiving tank two. The slider is positioned by the inner wall of the limiting groove abutting against the adjusting block, which makes positioning the slider more convenient.

[0013] Optionally, the first stirring rod is located above the second stirring rod, and the limiting post is provided with a clearance groove for the adjusting block to be inserted.

[0014] By adopting the above technical solution and setting a clearance groove, the adjusting block is inserted into the clearance groove before the workpiece is put into the receiving tank two, and then the workpiece is put into the receiving tank two. This can reduce the situation where the adjusting block protrudes from the stirring rod one and stirring rod two, causing the adjusting block to be damaged by the falling workpiece.

[0015] Optionally, the elastic element one includes an elastic sheet disposed on the limiting post and a connecting strip disposed on the elastic sheet. The outer edge of the elastic sheet is fixedly connected to the limiting post, and the connecting strip is located on the side of the elastic sheet away from the limiting post and is connected to the hinge shaft of the stirring rod one and the stirring rod two.

[0016] By adopting the above technical solution, an elastic sheet and a connecting strip are set. When the hinged part of stirring rod one and stirring rod two extends away from the limiting post, the connecting strip drives the elastic sheet to deform away from the limiting post, thereby forming a slope on the surface of the elastic sheet that slopes outward from the connecting strip towards the limiting post. When roller two rotates, the workpiece passes between the elastic sheet and stirring rod one / stirring rod two and squeezes the elastic sheet. The elastic sheet resets and pushes the workpiece towards stirring rod one / stirring rod two, thereby squeezing the workpiece, separating the attached workpiece, further dispersing the workpiece, making the passivation more complete, and improving the passivation effect.

[0017] Optionally, the outer walls of the first stirring rod and the second stirring rod are provided with a plurality of limiting annular grooves, which are distributed along the length of the first stirring rod / the second stirring rod. The first stirring rod and the second stirring rod are provided with a plurality of partition blocks, which are inserted into the limiting annular grooves. The partition blocks are provided with through holes for the first stirring rod / the second stirring rod to be inserted into. The partition blocks are provided with notches, which communicate with the through holes. The partition blocks are also provided with movable holes, which are located on opposite sides of the notches, and the distance between the movable holes on both sides of the notches gradually increases in the direction away from the through holes.

[0018] A locking block is slidably connected to the partition block. The locking block passes through the movable hole and slides closer to or away from the hole. An elastic element three is provided on the partition block. The elastic element three abuts against the locking block, so that the locking block tends to move away from the hole.

[0019] By adopting the above technical solution, when the workpiece passes through stirring rod one and stirring rod two, the partition block can separate the attached workpiece, further improving the dispersion effect of the workpiece. The distance between adjacent partition blocks on stirring rod one and stirring rod two can also be adjusted according to the size of the workpiece. When the distance between adjacent partition blocks is less than the size of the workpiece, the locking block is moved closer to the through hole, and the locking block abuts against the inner wall of the movable hole, thereby opening the partition block, making the through hole larger and the partition block disengaging from the limiting ring groove. Then, the partition block is moved until the distance between adjacent partition blocks is greater than the size of the workpiece and the partition block and the limiting ring groove are aligned. The locking block is then released, and under the action of elastic element three, the locking block moves away from the through hole. The partition block resets and then engages in the corresponding limiting ring groove. By the partition block abutting against the inner wall of the limiting ring groove, the partition block can be positioned, thus adjusting the distance between adjacent partition blocks and reducing the possibility of the workpiece being stuck by adjacent partition blocks.

[0020] Optionally, the limiting post includes a base on the second roller, a mounting block that slides and rises on the base, a locking block and an elastic element four on the base, and a protrusion on the locking block. The slider and the second stirring rod are both on the mounting block. The mounting block is also rotatably connected to the base. The protrusion is located below the locking block. The mounting block also has a connecting groove. The inner wall of the connecting groove has several positioning grooves. The positioning grooves are distributed along the sliding direction of the mounting block. The locking block is located in the connecting groove. The positioning groove is for the locking block to engage. The lower inner wall of the positioning groove has a groove for the protrusion to engage. The elastic element four abuts against the mounting block, causing the mounting block to tend to move away from the base.

[0021] By adopting the above technical solution, when it is necessary to adjust the distance between adjacent partition blocks, the mounting block is pressed down to disengage the protrusion from the groove. Then, the mounting block is rotated so that the locking block is located in the connecting groove. The mounting block is then moved up so that the partition block extends out of the second roller. When the mounting block moves to the corresponding position and the locking block and the positioning groove are aligned, the mounting block is rotated so that the locking block is engaged in the positioning groove. Then, the mounting block is released, and the mounting block moves up under the action of the elastic element four so that the protrusion is engaged in the groove. This positions the mounting block, allowing the operator to adjust the partition block without having to reach into the second roller to operate, making it more convenient to adjust the position of the partition block.

[0022] Secondly, this application provides a barrel galvanizing process, employing the following technical solution:

[0023] A barrel galvanizing process includes degreasing, water washing, pickling, water washing, acid galvanizing, water washing, brightening, and passivation, wherein the passivation step uses any of the passivation devices described above.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. After the workpiece is placed into the receiving tank 2, the slider is moved so that the hinged part of stirring rod 1 and stirring rod 2 extends away from the limiting post. When the drum 2 rotates, the extended part of stirring rod 1 and stirring rod 2 agitates the workpiece in the receiving tank 2, thereby separating the attached workpieces and improving the passivation effect on the workpiece, which is beneficial to improving the quality of the produced workpiece. When the drum 2 is not in use, the positioning state of the slider is released. Under the action of elastic element 1, the slider drives the hinged part of stirring rod 1 and stirring rod 2 to move closer to the limiting post. When the workpiece is poured into the receiving tank 2 in the future, the impact of the workpiece on stirring rod 1 and stirring rod 2 can be reduced, which can cause damage to stirring rod 1 and stirring rod 2 and help extend the service life of stirring rod 1 and stirring rod 2.

[0026] 2. By setting elastic plates and connecting strips, when the hinged part of stirring rod one and stirring rod two extends away from the limiting post, a slope is formed on the surface of the elastic plate. When the second roller rotates, the workpiece passes between the elastic plate and stirring rod one / stirring rod two and squeezes the elastic plate. The elastic plate resets and then squeezes the workpiece, causing the attached workpieces to separate, further dispersing the workpieces and improving the passivation effect.

[0027] 3. When the workpiece passes through stirring rod one and stirring rod two, the partition blocks can separate the attached workpieces, further improving the dispersion effect of the workpiece. The distance between adjacent partition blocks on stirring rod one and stirring rod two can also be adjusted according to the size of the workpiece, which can reduce the situation where the workpiece is stuck by adjacent partition blocks. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall zinc plating passivation equipment in related technologies.

[0029] Figure 2 This is a schematic diagram of an embodiment of this application.

[0030] Figure 3 for Figure 2 The enlarged view of section A mainly shows the structure of drive component two.

[0031] Figure 4 This is a partial cross-sectional view of an embodiment of this application, mainly showing the structure of the limiting post.

[0032] Figure 5 for Figure 4The enlarged view of section B mainly shows the structure of the card blocks and protrusions.

[0033] Figure 6 This is a partial cross-sectional view of an embodiment of this application, mainly showing the structure of the connecting groove.

[0034] Figure 7 This is a partial cross-sectional view of an embodiment of this application, mainly showing the structure of the positioning component.

[0035] Figure 8 This is a partial structural diagram of an embodiment of this application, mainly showing the structure of the locking block and the elastic element three.

[0036] Explanation of reference numerals in the attached drawings: 1. Passivation groove one; 2. Frame one; 3. Roller one; 31. Receiving groove one; 32. Through hole one; 4. Drive component one; 5. Passivation groove two; 6. Frame two; 7. Roller two; 71. Receiving groove two; 72. Through hole two; 73. Insert groove; 8. Drive component two; 81. Motor two; 82. Drive gear two; 83. Transmission gear two; 9. Limiting post; 91. Base; 92. Mounting block; 921. Slide groove; 922. Connecting groove; 923. Positioning groove; 924. Groove; 925. Clearance groove; 93. Locking block; 9 4. Elastic component four; 95. Protrusion; 10. Slider; 11. Stirring rod one; 12. Stirring rod two; 13. Positioning assembly; 131. Adjusting block; 132. Positioning block; 1321. Sliding part; 1322. Abutting part; 1323. Through part; 133. Elastic component two; 14. Positioning hole; 15. Limiting groove; 16. Elastic component one; 161. Elastic sheet; 162. Connecting strip; 17. Limiting ring groove; 18. Separator block; 181. Through hole; 182. Notch; 183. Movable hole; 19. Locking block; 20. Elastic component three. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0038] In related technologies, there is a zinc plating passivation device, see [link to related technology]. Figure 1The device includes a passivation tank 1, a frame 2, and a roller 3. The frame 2 is located above the passivation tank 1, and the roller 3 is located inside the passivation tank 1 and rotatably connected to the frame 2. The frame 2 is equipped with a drive component 4 that drives the roller 3 to rotate. The drive component 4 includes a motor, a drive gear, and a transmission gear. The motor is fixed to the frame 2, the drive gear is coaxially fixed to the output shaft of the motor, and the transmission gear and the roller 3 are coaxially fixed and meshed. The motor drives the drive gear to rotate, and the drive gear drives the transmission gear and the roller 3 to rotate through the meshing with the transmission gear. The roller 3 has a receiving groove 31, and the outer peripheral wall of the roller 3 has several through holes 32 circumferentially open, all of which are connected to the receiving groove 31.

[0039] This application discloses a passivation device. See also... Figure 2 and Figure 3 The passivation device includes a passivation tank 25, a frame 26, and a roller 27. The frame 26 is located above the passivation tank 25, and the roller 27 is located inside the passivation tank 25 and rotatably connected to the frame 26. The rotation axis of the roller 27 is vertically arranged. A drive component 28 is installed on the frame 26. In this embodiment, the drive component 28 includes a motor 281, a drive gear 282, and a transmission gear 283. The motor 281 is fixed on the frame 26, the drive gear 282 is coaxially fixed on the output shaft of the motor 281, and the transmission gear 283 is coaxially fixed with the roller 27, and the transmission gear 283 meshes with the drive gear 282.

[0040] In actual use, motor 281 drives drive gear 282 to rotate, and drive gear 282 drives drive gear 283 and roller 27 to rotate through meshing with drive gear 283.

[0041] See Figure 4 and Figure 5 The upper end face of the roller 7 is provided with a receiving groove 71. The outer peripheral wall of the roller 7 is provided with several through holes 72 in the circumferential direction. The several through holes 72 are all connected to the receiving groove 71. The roller 7 is provided with a limiting post 9. The limiting post 9 is located in the receiving groove 71. The limiting post 9 includes a base 91, a mounting block 92, a locking block 93, an elastic element 94, and a protrusion 95. The base 91 is fixed on the roller 7. The mounting block 92 is located on the side of the base 91 away from the bottom of the receiving groove 71. The end face of the mounting block 92 near the base 91 is provided with a sliding groove 921. The base 91 is slidably connected in the sliding groove 921. The mounting block 92 is raised and lowered and slid on the base 91 through the cooperation of the sliding groove 921 and the base 91. The mounting block 92 is rotatably connected to the base 91 through the cooperation of the sliding groove 921 and the base 91. The rotation axis of the mounting block 92 is parallel to its sliding direction.

[0042] See Figure 4and Figure 5 The locking block 93 is located on the outside of the base 91 and fixed to the outer peripheral wall of the base 91. The protrusion 95 is located below the locking block 93 and is fixedly connected to the locking block 93. The elastic element 94 is located between the mounting block 92 and the bottom of the receiving groove 71 and is fixed to the inner wall of the bottom of the receiving groove 71. The end of the elastic element 94 away from the bottom of the receiving groove 71 abuts against the mounting block 92, so that the mounting block 92 tends to move away from the base 91. In this embodiment, the elastic element 94 is a spring.

[0043] See Figure 5 and Figure 6 A connecting groove 922 is provided on the inner side wall of the sliding groove 921. A plurality of positioning grooves 923 are provided on the inner side wall of the connecting groove 922. The plurality of positioning grooves 923 are evenly spaced along the sliding direction of the mounting block 92. The locking block 93 is located in the connecting groove 922, and the positioning groove 923 is for the locking block 93 to be inserted. A groove 924 is provided on the lower inner wall of each positioning groove 923, and the groove 924 is for the protrusion 95 to be inserted.

[0044] See Figure 6 A slider 10 is mounted on the mounting block 92 and slides vertically. The slider 10 is sleeved on the outside of the mounting block 92. A stirring rod 11 is hinged to the slider 10. The stirring rod 11 is located below the slider 10, and the hinge axis of the stirring rod 11 is perpendicular to the rotation axis of the roller 7. A stirring rod 12 is hinged to the mounting block 92. The stirring rod 12 is located below the stirring rod 11, and the hinge axis of the stirring rod 12 and the mounting block 92 is parallel to the hinge axis of the stirring rod 11 and the slider 10. The end of the stirring rod 12 near the stirring rod 11 and the end of the stirring rod 11 away from the slider 10 are hinged together, and the hinge axis of the stirring rod 11 and the stirring rod 12 is parallel to the hinge axis of the stirring rod 11 and the slider 10.

[0045] See Figure 4 and Figure 7 A groove 73 is provided on the inner side wall of the receiving groove 71. A positioning component 13 is provided on the stirring rod 12. The positioning component 13 includes an adjusting block 131, a positioning block 132 and an elastic element 133. The adjusting block 131 is fixed on the hinge axis of the stirring rod 11 and the stirring rod 12, and the adjusting block 131 is located above the groove 73. A positioning hole 14 is provided on the outer side wall of the adjusting block 131. The positioning hole 14 passes through the adjusting block 131 in a direction perpendicular to the hinge axis of the stirring rod 11 and the stirring rod 12.

[0046] See Figure 4 and Figure 7The positioning block 132 includes a sliding part 1321, an abutting part 1322, and a through part 1323. The sliding part 1321 is slidably connected to the groove 73, and the sliding part 1321 slides closer to or further away from the mounting block 92. The abutting part 1322 is located in the receiving groove 71 and fixed to the side of the sliding part 1321 away from the bottom of the groove 73. The through part 1323 is located above the abutting part 1322 and is fixedly connected to the abutting part 1322. The through part 1323 is located near the outer wall of the sliding part 1321. A limiting groove 15 is provided, and a positioning hole 14 is provided for the through part 1323 to pass through. The limiting groove 15 is provided for the adjustment block 131 to be inserted. The elastic element 133 is located in the groove 73 and between the sliding part 1321 and the bottom of the groove 73. The opposite ends of the elastic element 133 are fixedly connected to the inner wall of the sliding part 1321 and the bottom of the groove 73, respectively. The elastic element 133 pulls the sliding part 1321, so that the abutting part 1322 abuts against the inner wall of the receiving groove 71. In this embodiment, the elastic element 133 is a spring.

[0047] See Figure 6 and Figure 7 The outer peripheral wall of the mounting block 92 is provided with a clearance groove 925 for the adjusting block 131 to be inserted. In actual use, before the workpiece is put into the receiving groove 71, the adjusting block 131 is inserted into the clearance groove 925 to store the adjusting block 131, and then the workpiece is put into the receiving groove 71. This can reduce the situation where the adjusting block 131 protrudes from the stirring rod 11 and stirring rod 2 12, and is damaged by the falling workpiece.

[0048] See Figure 6 The mounting block 92 is also provided with an elastic element 16, which includes an elastic sheet 161 and a connecting strip 162. The outer edge of the elastic sheet 161 is fixedly connected to the outer side wall of the mounting block 92. The connecting strip 162 is located on the side of the elastic sheet 161 away from the mounting block 92 and is fixedly connected to the elastic sheet 161. The end of the connecting strip 162 away from the elastic sheet 161 is fixedly connected to the hinge axis of the stirring rod 11 and the stirring rod 2 12. The elastic sheet 161 pulls the stirring rod 11 tight through the connecting strip 162, so that the slider 10 tends to move away from the stirring rod 2 12. In this embodiment, the material of the elastic sheet 161 is rubber.

[0049] In actual use, after the workpiece is put into the second receiving tank 71, the slider 10 is moved closer to the stirring rod 12, and the abutment part 1322 is moved closer to the mounting block 92, so that the positioning hole 14 and the through part 1323 are aligned, until the through part 1323 passes through the positioning hole 14 and the adjusting block 131 and the limiting groove 15 are aligned. The abutment part 1322 is released, and the abutment part 1322 moves under the action of the elastic element 133, so that the adjusting block 131 is inserted into the limiting groove 15, until the abutment part 1322 presses against the inner wall of the second receiving tank 71 to achieve positioning. At this time, the slider 10 can be positioned by the inner wall of the limiting groove 15 abutting against the adjusting block 131.

[0050] See Figure 6 and Figure 8 Both stirring rod 11 and stirring rod 2 are provided with several limiting annular grooves 17 on their outer side walls. The limiting annular grooves 17 are evenly spaced along the length of stirring rod 11 / stirring rod 2 12, and each limiting annular groove 17 is arranged around the outer periphery of stirring rod 11 / stirring rod 2 12. Both stirring rod 11 and stirring rod 2 12 are equipped with several partition blocks 18. The limiting annular grooves 17 are used to engage the partition blocks 18. Each partition block 18 is provided with a through hole 181, which is used to engage the stirring rod 11 / stirring rod 2 12. Each partition block 18 is also provided with a notch 182, which is connected to the through hole 181. The notch 182 penetrates the partition block 18 in a direction away from the through hole 181. Each partition block 18 is also provided with two movable holes 183, which are located on opposite sides of the notch 182. The distance between the two movable holes 183 gradually increases in the direction away from the through hole 181.

[0051] See Figure 6 and Figure 8 Each partition block 18 is slidably connected to a locking block 19. The locking block 19 has two movable holes 183 and slides closer to or away from the through hole 181. Each partition block 18 is fixed with an elastic element 20. The number and position of the elastic element 20 correspond one-to-one with the number and position of the movable holes 183. Each elastic element 20 is located in the corresponding movable hole 183 and on the side of the locking block 19 closer to the through hole 181. The opposite ends of each elastic element 20 are fixedly connected to the inner walls of the locking block 19 and the movable hole 183, respectively. The elastic element 20 abuts against the locking block 19, so that the locking block 19 tends to move away from the through hole 181. In this embodiment, the elastic element 20 is a spring, and the material of the partition block 18 is spring steel, which has a certain elasticity.

[0052] In practical use, when the workpiece passes through the stirring rod 11 and stirring rod 2, the partition block 18 can separate the attached workpiece, further improving the dispersion effect of the workpiece. The distance between adjacent partition blocks 18 on stirring rod 11 and stirring rod 2 can also be adjusted according to the size of the workpiece. When the distance between adjacent partition blocks 18 is less than the size of the workpiece, the locking block 19 is moved closer to the through hole 181. The locking block 19 presses against the inner wall of the movable hole 183, thereby opening the partition block 18, making the through hole 181 larger and the partition block 18 disengage from the limiting ring groove 17.

[0053] Then move the separator 18 until the distance between adjacent separators 18 is greater than the size of the workpiece and the separator 18 and the limiting ring groove 17 are aligned. Release the locking block 19. Under the action of the elastic element 20, the locking block 19 moves away from the through hole 181. The separator 18 resets and then gets stuck in the corresponding limiting ring groove 17. By the separator 18 abutting against the inner wall of the limiting ring groove 17, the separator 18 can be positioned, and the distance between adjacent separators 18 can be adjusted, which can reduce the situation where the workpiece is stuck by adjacent separators 18.

[0054] When it is necessary to adjust the distance between adjacent separator blocks 18, press down the mounting block 92 so that the protrusion 95 disengages from the groove 924. Then rotate the mounting block 92 so that the locking block 93 is located in the connecting groove 922. Then move the mounting block 92 up so that the separator block 18 extends out of the roller 2 7. When the mounting block 92 moves to the corresponding position and the locking block 93 and the positioning groove 923 are aligned, rotate the mounting block 92 so that the locking block 93 is engaged in the positioning groove 923. Then release the mounting block 92. The mounting block 92 moves up under the action of the elastic element 4 94 so that the protrusion 95 is engaged in the groove 924. The mounting block 92 can then be positioned so that the operator can adjust the separator block 18 without having to reach into the roller 2 7 to operate, making it more convenient to adjust the position of the separator block 18.

[0055] The implementation principle of a passivation device according to an embodiment of this application is as follows:

[0056] After the workpiece is placed into the receiving tank 71, the slider 10 is moved close to the stirring rod 12, and the through part 1323 passes through the positioning hole 14 and the adjusting block 131 is engaged in the limiting groove 15 to achieve the positioning of the slider 10. At this time, the hinged part of the stirring rod 11 and the stirring rod 12 extends away from the mounting block 92, and the elastic plate 161 is deformed away from the mounting block 92 by the connecting strip 162, forming a slope on the surface of the elastic plate 161 that is inclined outward from the direction of the connecting strip 162 toward the mounting block 92.

[0057] When the second drum 7 rotates, the extended parts of the first stirring rod 11 and the second stirring rod 12 agitate the workpiece in the second receiving tank 71, thereby separating the attached workpieces. At the same time, the workpiece passes between the elastic plate 161 and the first stirring rod 11 / the second stirring rod 12 and is squeezed by the elastic plate 161. The elastic plate 161 resets and pushes the workpiece toward the first stirring rod 11 / the second stirring rod 12, thereby squeezing the workpiece and separating the attached workpieces. This further disperses the workpiece so that the passivation liquid can fully wet the surface of the workpiece, making the passivation of the workpiece more uniform and thorough, improving the passivation effect of the workpiece, and thus helping to improve the quality of the produced workpiece.

[0058] When the roller 2 7 is not in use, the positioning state of the slider 10 is released. Under the action of the elastic element 1 16, the slider 10 drives the hinged part of the stirring rod 1 11 and the stirring rod 2 12 to move closer to the mounting block 92. When the workpiece is poured into the receiving groove 2 71 in the future, it can reduce the possibility of the workpiece impacting the stirring rod 1 11 and the stirring rod 2 12 and causing damage to the stirring rod 1 11 and the stirring rod 2 12, which is conducive to extending the service life of the stirring rod 1 11 and the stirring rod 2 12.

[0059] This application also discloses a barrel galvanizing process, including the following steps: degreasing, water washing, pickling, water washing, acid galvanizing, water washing, brightening, and passivation. In the passivation step, the above-mentioned passivation device is used to passivate the workpiece.

[0060] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A passivation device, comprising a passivation groove (5), a frame (6), and a roller (7) rotatably connected to the frame (6), wherein the frame (6) is provided with a driving member (8) for driving the roller (7) to rotate, the roller (7) is provided with a receiving groove (71), and a plurality of through holes (72) are provided on the outer side wall of the roller (7), the through holes (72) communicating with the receiving groove (71), characterized in that: The roller 2 (7) is provided with a limiting post (9), which is located in the receiving groove 2 (71). A slider (10) slides up and down on the limiting post (9). A stirring rod 1 (11) is hinged on the slider (10). A stirring rod 2 (12) is hinged on the limiting post (9). The stirring rod 2 (12) is located on the side of the stirring rod 1 (11) away from the slider (10), and the stirring rod 2 (12) and the stirring rod 1 (11) are hinged. An elastic element 1 (16) is provided on the limiting post (9). The elastic element 1 (16) pulls the stirring rod 1 (11) tight, so that the slider (10) tends to move away from the stirring rod 2 (12). A positioning component (13) for positioning is provided on the stirring rod 2 (12). The first elastic element (16) includes an elastic sheet (161) disposed on the limiting post (9) and a connecting strip (162) disposed on the elastic sheet (161). The outer edge of the elastic sheet (161) is fixedly connected to the limiting post (9). The connecting strip (162) is located on the side of the elastic sheet (161) away from the limiting post (9) and is connected to the hinge shaft of the first stirring rod (11) and the second stirring rod (12).

2. The passivation apparatus according to claim 1, characterized in that: The positioning assembly (13) includes an adjusting block (131) disposed on the hinge shaft of the first stirring rod (11) and the second stirring rod (12), a positioning block (132) slidably connected to the second roller (7), and an elastic element (133) disposed on the second roller (7). The positioning block (132) is located below the adjusting block (131) and within the receiving groove (71), and the positioning block (132) slides close to or Away from the limiting post (9), the adjusting block (131) has a positioning hole (14) for the positioning block (132) to pass through. The positioning block (132) has a limiting groove (15) for the adjusting block (131) to be inserted into. The elastic element (133) pulls the positioning block (132) tight, so that the positioning block (132) abuts against the inner wall of the receiving groove (71).

3. The passivation apparatus according to claim 2, characterized in that: The stirring rod one (11) is located above the stirring rod two (12), and the limiting post (9) has a relief groove (925) for the adjusting block (131) to be inserted.

4. The passivation apparatus according to claim 1, characterized in that: The outer walls of the first stirring rod (11) and the second stirring rod (12) are provided with a plurality of limiting annular grooves (17), which are distributed along the length of the first stirring rod (11) and the second stirring rod (12). The first stirring rod (11) and the second stirring rod (12) are provided with a plurality of partition blocks (18), and the limiting annular grooves (17) are for the partition blocks (18) to be inserted into. The partition blocks (18) are provided with a plurality of partitions for the first stirring rod (11) and the second stirring rod (12) to be inserted into. The stirring rod 2 (12) is inserted into the through hole (181), and the partition block (18) has a notch (182) that is connected to the through hole (181). The partition block (18) also has a movable hole (183) that is located on opposite sides of the notch (182). The distance between the movable holes (183) on both sides of the notch (182) gradually increases in the direction away from the through hole (181). A locking block (19) is slidably connected to the partition block (18). The locking block (19) passes through the movable hole (183) and slides closer to or away from the through hole (181). An elastic element (20) is provided on the partition block (18). The elastic element (20) abuts against the locking block (19), so that the locking block (19) tends to move away from the through hole (181).

5. The passivation apparatus according to claim 4, characterized in that: The limiting post (9) includes a base (91) on the roller 2 (7), a mounting block (92) that slides and rises on the base (91), a locking block (93) and an elastic element 4 (94) on the base (91), and a protrusion (95) on the locking block (93). The slider (10) and the stirring rod 2 (12) are both located on the mounting block (92). The mounting block (92) is also rotatably connected to the base (91). The protrusion (95) is located below the locking block (93). The mounting block (92) is also provided with a connecting groove (922). The inner wall of the connecting groove (922) is provided with a plurality of positioning grooves (923), which are distributed along the sliding direction of the mounting block (92). The locking block (93) is located in the connecting groove (922), and the positioning groove (923) is for the locking block (93) to be inserted. The lower inner wall of the positioning groove (923) is provided with a groove (924), which is for the protrusion (95) to be inserted. The elastic member (94) abuts against the mounting block (92), so that the mounting block (92) tends to move away from the base (91).

6. A barrel galvanizing process, characterized in that, The process includes the following steps: degreasing, water washing, pickling, water washing, acid zinc plating, water washing, brightening, and passivation, wherein the passivation step uses the passivation apparatus described in any one of the preceding claims.

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