A stepped shaft part chromium plating auxiliary assembly and a processing method thereof

Abstract

The present application relates to the technical field of mechanical manufacturing, and discloses a kind of step shaft parts chrome plating auxiliary assembly, including chrome plating component, including bottom plate, the bottom plate top is fixed with support column, the support column surface is fixed with insulating plate, the insulating plate is opened with through-hole and accommodating groove, the accommodating groove is provided with lead ring, the support column end is fixed with top plate, and the top plate top is fixed with hanger.The present application has beneficial effects:1.improve coating uniformity and shorten time: through the lead ring in the accommodating groove of insulating plate and main anode common connection power supply, auxiliary electric field is formed in step surface and bottom end of stem, Cr 6+ migration force is supplemented, and the thickness of coating in this area is flat with middle section of stem, without extending electroplating time;2.simplify the protection operation of non-chrome plating area: rely on the positioning seat of support assembly, support seat respectively shield base, sealing sleeve is set in spring action Thin shaft, without manual wrapping, reduce process and time-consuming.

Description

Technical Field

[0001] This invention relates to the field of mechanical manufacturing technology, and in particular to a chrome-plating auxiliary component for stepped shaft parts and its processing method. Background Technology

[0002] In the field of mechanical manufacturing, stepped shafts, due to their structure with shaft segments of different diameters, are widely used in core equipment such as transmission systems and hydraulic devices. To improve their surface wear resistance and corrosion resistance, chrome plating is a commonly used surface strengthening process for these parts. The core requirement is to form a uniform chrome plating layer of the required thickness on the shaft. However, the base and the top thin shaft need to avoid chrome plating due to functional requirements. In existing stepped shaft chrome plating processes, the workpiece to be plated is usually placed directly into the electroplating tank. The electrolytic environment is constructed using the lead anode set on the side wall of the electroplating tank, and chromium ions are driven by an electric field ( The cathode migrates towards the workpiece and eventually deposits a coating on the workpiece surface.

[0003] However, this process has two major technical pain points: First, because the base diameter of the stepped shaft is much larger than the rod diameter, the electric field generated by the main anode will form a significant shielding effect in the base area, hindering the migration of chromium ions to the bottom of the rod and the vicinity of the stepped surface. This results in the plating thickness in this area being less than that in the middle section of the rod, failing to meet design requirements. To ensure that the plating around the stepped surface meets the standards, the industry generally compensates by extending the electroplating time, which not only reduces production efficiency but also easily leads to excessively thick plating in the middle section of the rod. Second, the protection operation for non-chromium-plated areas is cumbersome. The process requires that the base and the top thin shaft not be chromium-plated. Existing technology requires manually wrapping this area with insulating tape, rubber sleeves, and other materials before electroplating. The wrapping process requires positioning and fitting each piece individually, which is time-consuming and labor-intensive. Summary of the Invention

[0004] In view of the problems existing in the above and / or existing chrome plating auxiliary components and processing methods for stepped shaft parts, the present invention is proposed.

[0005] Therefore, the problem that this invention aims to solve is that the existing stepped shaft chrome plating process is prone to prolonging the electroplating time due to the stepped surface, and the processing of the base and the top thin shaft is time-consuming and labor-intensive.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a chrome plating auxiliary assembly for stepped shaft parts, comprising a chrome plating assembly including a base plate, a support column fixed to the top of the base plate, an insulating plate fixed to the surface of the support column, a through hole and a receiving groove on the insulating plate, a lead ring disposed in the receiving groove, a top plate fixed to the end of the support column, a hanger fixed to the top of the top plate, a machined part disposed in the through hole, and a base, a rod, a stepped surface and a thin shaft disposed on the machined part.

[0007] As a preferred embodiment of the chrome plating auxiliary assembly for stepped shaft parts of the present invention, it includes a support assembly disposed on the chrome plating assembly. The support assembly includes a threaded post fixed to the top of the base plate. A positioning seat is rotatably connected to the surface of the threaded post by means of threads. The base is inserted into the positioning seat.

[0008] As a preferred embodiment of the chrome plating auxiliary assembly for stepped shaft parts of the present invention, the support assembly further includes a support member disposed on the insulating plate, the support member including a support base fixed to the bottom of the insulating plate by bolts, the support base having a placement groove, and the base being inserted into the placement groove.

[0009] As a preferred embodiment of the chrome plating auxiliary component for stepped shaft parts of the present invention, the support further includes a movable sleeve disposed at the bottom of the support base, a slider fixed at the top of the movable sleeve, and a groove provided at the bottom of the support base, wherein the slider slides within the groove.

[0010] As a preferred embodiment of the chrome plating auxiliary component for stepped shaft parts of the present invention, the support member further includes a sealing sleeve disposed within the movable sleeve, a drive handle fixed to the surface of the sealing sleeve, a limiting groove formed on the surface of the movable sleeve, and the drive handle sliding within the limiting groove.

[0011] As a preferred embodiment of the chrome plating auxiliary component for stepped shaft parts of the present invention, the support member further includes a spring disposed within the sealing sleeve, with both ends of the spring fixed to the inner wall of the sealing sleeve and the inner wall of the movable sleeve, respectively.

[0012] As a preferred embodiment of the chrome plating auxiliary component for stepped shaft parts of the present invention, the support member further includes a limiting rod disposed on the top of the sealing sleeve, the bottom of the support base is provided with a moving groove and a through groove, the limiting rod slides in the moving groove, and the diameter of the through groove is larger than the outer diameter of the limiting rod.

[0013] As a preferred embodiment of the chrome plating auxiliary assembly for stepped shaft parts of the present invention, it includes: an adjustment assembly disposed on the chrome plating assembly, the adjustment assembly including a support member disposed below the base plate, the support member including a support plate disposed at the bottom of the base plate, a pin fixed to the top of the support plate, an insertion hole opened on the base plate, the pin being inserted into the insertion hole, a connecting plate fixed to the surface of the support plate, the other end of the connecting plate being fixed to the inner wall of the receiving groove, and a rotating disk rotatably connected to the bottom of the receiving groove.

[0014] As a preferred embodiment of the chrome plating auxiliary assembly for stepped shaft parts of the present invention, the adjusting assembly further includes an adjusting member disposed on the receiving groove. The adjusting member includes a fixed seat fixed to the surface of the receiving groove. A rotating shaft is rotatably connected inside the fixed seat. A bevel gear is fixed to the surface of the rotating shaft. A handle is fixed to the other end of the rotating shaft. A gear ring is rotatably connected inside the receiving groove. A bevel gear ring is fixed to the top of the gear ring. The bevel gear and the bevel gear ring mesh. A support rod is fixed to the top of the connecting plate. A rotating sleeve is sleeved on the surface of the support rod. A driving block is fixed to the surface of the rotating sleeve. A rotating seat is sleeved on the surface of the rotating sleeve. A gear is fixed to the top of the rotating seat. The outer diameter of the rotating seat is larger than the outer diameter of the gear. The gear and the gear ring mesh. A driving groove is opened inside the rotating seat. The driving block slides in the driving groove. A rocker arm is fixed to the surface of the rotating sleeve. A lever is fixed to the end of the rocker arm. A slot is opened on the surface of the lever. A positioning plate is fixed to the surface of the rotating seat. A connecting ring is provided on the surface of the rotating sleeve. The rotating sleeve is rotatably connected to the connecting ring.

[0015] As a preferred embodiment of the chrome plating auxiliary assembly for stepped shaft parts described in this invention, it includes the following steps:

[0016] S1: Workpiece placement and positioning: Insert the base of the workpiece to be chrome plated into the placement slots of the positioning seat and the support seat respectively to complete the initial positioning;

[0017] S2: Protection of non-chrome-plated areas: The rotating shaft of the rotating adjustment component drives the lever to move the moving sleeve to the top of the workpiece via bevel gears, gear rings, etc. The sealing sleeve is fitted with a thin shaft under the action of a spring, and the positioning seat and support seat cover the base.

[0018] S3: Chromium plating operation: Place the chromium plating components into the electroplating tank, ensuring that the main anode of the electroplating tank is connected to the power supply anode of the lead ring inside the insulating plate receiving tank. A coating is deposited on the rod and the stepped surface under the action of an electric field;

[0019] S4: Workpiece removal: After chrome plating, place the chrome plating assembly on the adjusting assembly, rotate the rotating shaft in the opposite direction and pull the connecting ring to disengage the sealing sleeve from the thin shaft, reset the moving sleeve, and finally remove the machined workpiece.

[0020] The beneficial effects of this invention are:

[0021] 1. Improve coating uniformity and shorten time: By connecting the lead ring in the insulating plate receiving tank to the main anode and creating an auxiliary electric field on the stepped surface and the bottom of the rod, the coating uniformity is improved. The migration force makes the coating thickness in this area the same as that in the middle section of the rod, eliminating the need to extend the electroplating time;

[0022] 2. Simplify the protection operation of non-chrome-plated areas: The positioning seat and support seat of the support component cover the base respectively, and the sealing sleeve is fitted onto the thin shaft under the action of the spring, eliminating the need for manual wrapping and reducing the number of procedures and time.

[0023] 3. Synchronous operation and solution recovery: Multiple processing parts can be placed simultaneously on the multi-layer insulation board, and the toothed rings and gears of the components can be adjusted to achieve synchronous positioning and protection of multiple parts; the receiving tank collects the chromic acid solution carried by the chromium-plated components, improving efficiency and resource utilization. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0025] Figure 1 A structural diagram of the auxiliary components for chrome plating of stepped shaft parts.

[0026] Figure 2 A structural diagram of the mounting base for the chrome-plating auxiliary assembly of stepped shaft parts.

[0027] Figure 3 A structural diagram of the positioning plate for the chrome plating auxiliary assembly of stepped shaft parts.

[0028] Figure 4 Partial structural diagram of the lead ring for the chrome plating auxiliary component of stepped shaft parts.

[0029] Figure 5 A cross-sectional view of the auxiliary components for chrome plating of stepped shaft parts.

[0030] Figure 6 A cross-sectional view of the rotating seat of the chrome-plated auxiliary component for stepped shaft parts.

[0031] Figure 7 A structural diagram of the insulating plate for the chrome plating auxiliary components of stepped shaft parts.

[0032] Figure 8 Auxiliary components for chrome plating of stepped shaft parts Figure 7 Enlarged view of the structure at point A in the middle.

[0033] Figure 9 A cross-sectional view of the support base for the chrome-plating auxiliary assembly of stepped shaft parts.

[0034] Figure 10 A cross-sectional view of the movable sleeve of the chrome-plating auxiliary component for stepped shaft parts.

[0035] Figure 11A structural diagram of the machining component for chrome plating auxiliary assemblies of stepped shaft parts.

[0036] In the diagram: Chrome-plated component 1; Base plate 11; Support column 12; Insulating plate 13; Through hole 13-1; Receiving groove 13-2; Lead ring 14; Top plate 15; Hanger 16; Machined part 17; Base 17-1; Rod 17-2; Step surface 17-3; Thin shaft 17-4; Support component 2; Threaded column 21; Positioning seat 22; Support component 23; Support seat 231; Placement groove 231-1; Moving sleeve 232; Slider 233; Slide groove 231-2; Sealing sleeve 234; Drive handle 235; Limiting groove 232-1; Spring 236; Limiting rod 237; Moving groove 231 -3; through slot 231-4; adjusting component 3; bearing component 31; bearing plate 311; insert post 312; insertion hole 11-1; connecting plate 313; receiving groove 314; rotating disk 315; adjusting component 32; fixed seat 321; rotating shaft 322; bevel gear 323; handle 324; gear ring 325; bevel gear ring 326; support rod 327; rotating sleeve 328; driving block 329; rotating seat 3210; gear 3211; driving groove 3210-1; swing rod 3212; lever 3213; slot 3213-1; positioning plate 3214; connecting ring 3215. Detailed Implementation

[0037] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0038] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0039] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0040] Example 1:

[0041] Reference Figure 1 , Figure 4 , Figure 7 , Figure 8 and Figure 11This is the first embodiment of the present invention, which provides a chrome plating auxiliary assembly for stepped shaft parts. The chrome plating auxiliary assembly for stepped shaft parts includes a chrome plating assembly 1, including a base plate 11. A support column 12 is fixed to the top of the base plate 11, and an insulating plate 13 is fixed to the surface of the support column 12. The insulating plate 13 has through holes 13-1 and receiving grooves 13-2. Each insulating plate 13 has four through holes 13-1. A lead ring 14 is disposed in the receiving groove 13-2. The lead ring 14 is laid in the receiving groove 13-2. The device is formed by connecting the two ends of the lead wire inside. The top plate 15 is fixed to the end of the support column 12. The top plate 15 is fixed to the top of the bracket 16. There are two brackets 16, which are symmetrically arranged. The brackets 16 can hang the device on the support structure above the electroplating tank. A processing part 17 is provided in the through hole 13-1. The processing part 17 is provided with a base 17-1, a rod 17-2, a stepped surface 17-3 and a thin shaft 17-4. When chrome plating the processing part 17, it is generally necessary to wrap the base 17-1 and the thin shaft 17-4.

[0042] In the existing electroplating technology, the workpiece 17 is placed in an electroplating tank for electroplating. The sidewall of the electroplating tank has lead as the anode. When the coating is formed, the coating moves from around the workpiece 17 toward the workpiece 17 and finally adheres to the surface of the rod 17-2 and the step surface 17-3 of the workpiece 17. However, at the step surface 17-3, the base 17-1 is relatively large, which hinders chromium ions from approaching the bottom of the rod 17-2. This results in a lower coating thickness near the step surface 17-3. If the coating near the step surface 17-3 is to reach the required thickness, the electroplating time needs to be increased, which is inefficient.

[0043] In use, the electroplating tank and the lead rings 14 inside the four insulating plates 13 on the lower layer of this application are all connected to the power anode. After the lead rings 14 are connected to the positive terminal of the power supply, they generate an independent electric field. Their spatial position is close to the step surface 17-3, which can directly "cover the shielded area that the main anode cannot reach", that is, the bottom end of the rod 17-2 and the root of the step surface 17-3. It is equivalent to "adding an extra small anode" near the step surface 17-3, directly supplementing Cr in this area. 6 The migration dynamics of ⁺ ions.

[0044] 14 hours without lead rings It needs to migrate from the main anode, i.e., the electroplating tank wall, around the base 17-1 to the stepped surface 17-3, which involves a long path and high resistance; when there is a lead ring 14, It can migrate directly from the "closer lead ring 14" to the step surface 17-3, thus shortening the migration distance, significantly reducing migration resistance, and avoiding shielding interference from the base 17-1; ultimately achieving "the step surface 17-3 area" "Increased concentration and faster deposition rate" mean that the coating thickness can be the same as the middle section of rod 17-2, without the need to extend the electroplating time.

[0045] The core function of the insulating plate 13 is to prevent the electric field of the lead ring from spreading to non-target areas. Without the insulating plate 13, the electric field of the lead ring 14 may spread to the base 17-1 or other parts of the electroplating tank, resulting in wasted current and misplating of non-target areas. The insulating plate 13, through physical isolation, "constrains the electric field of the lead ring 14 to the target area of ​​the step surface 17-3 and the bottom of the rod 17-2", thereby improving the efficiency of electric field utilization.

[0046] Example 2:

[0047] Reference Figure 4 , Figure 6 , Figure 9 and Figure 10 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0048] Specifically, the support component 2 is installed on the chrome-plated component 1. The support component 2 is made of insulating and corrosion-resistant materials that can withstand strong oxidizing chromic acid solutions. The structure of the support component 2 needs to be maintained and repaired every once in a while to ensure that it can work properly. The support component 2 includes four threaded posts 21 fixed to the top of the base plate 11. The threaded posts 21 are evenly distributed in a circle on the top of the base plate 11 and are located directly below the center of the through hole 13-1. The surface of the threaded posts 21 is connected to the positioning seat 22 by a threaded rotation. The base 17-1 is inserted into the positioning seat 22 to place the bottom processing part 17. For processing parts 17 of different sizes, different sizes of positioning seats 22 can be replaced to adapt them. The positioning seat 22 is used to shield the base 17-1 so that the base 17-1 is not chrome-plated.

[0049] Specifically, the support assembly 2 also includes a support member 23 disposed on the insulating plate 13. The support member 23 includes a support base 231 fixed to the bottom of the insulating plate 13 by bolts. The support base 231 has a placement groove 231-1, and the base 17-1 is inserted into the placement groove 231-1.

[0050] Except for the bottom insulating plate 13, each insulating plate 13 is provided with four support seats 231. Since the support seats 231 are fixed by bolts and the working environment is a strong oxidizing environment, the support seats 231 need to be maintained every once in a while. When the base 17-1 is inserted into the placement groove 231-1, and the device is placed in the chromic acid solution in the electroplating tank for chromium plating, the base 17-1 is blocked by the support seats 231, so the base 17-1 will not be chromium plated. Therefore, there is no need to wrap the base 17-1, reducing the operation steps and improving work efficiency.

[0051] Specifically, the support member 23 also includes a movable sleeve 232 disposed at the bottom of the support base 231. A slider 233 is fixed on the top of the movable sleeve 232. A groove 231-2 is provided at the bottom of the support base 231, and the slider 233 slides in the groove 231-2.

[0052] There are two sliders 233 on the top of the movable sleeve 232. By sliding the sliders 233 on the groove 231-2, the movable sleeve 232 can slide stably at the bottom of the support 231. When the sliders 233 slide to the end of the groove 231-2, the movable sleeve 232 can move directly above the workpiece 17.

[0053] Specifically, the support member 23 also includes a sealing sleeve 234 disposed within the movable sleeve 232. The inner diameter of the sealing sleeve 234 is equal to the outer diameter of the thin shaft 17-4. A drive handle 235 is fixed on the surface of the sealing sleeve 234. A limiting groove 232-1 is formed on the surface of the movable sleeve 232. The drive handle 235 slides within the limiting groove 232-1, which prevents the sealing sleeve 234 from rotating relative to the movable sleeve 232. When the movable sleeve 232 moves directly above the workpiece 17, the sealing sleeve 234 falls and covers the surface of the thin shaft 17-4, thereby encasing the thin shaft 17-4 and preventing it from being chrome-plated. This eliminates the need for additional encasing of the thin shaft 17-4, reducing operational steps and improving work efficiency.

[0054] By pulling the drive handle 235, the sealing sleeve 234 can be moved upward, thereby moving the sealing sleeve 234 away from the thin shaft 17-4, and then moving the moving sleeve 232 away from directly above the workpiece 17. At this time, the workpiece 17 can be pulled upward and taken out.

[0055] Specifically, the support member 23 also includes a spring 236 disposed in the sealing sleeve 234. The spring 236 is in a compressed state, and its two ends are fixed to the inner wall of the sealing sleeve 234 and the inner wall of the movable sleeve 232, respectively. Through the elastic force of the spring 236, the sealing sleeve 234 can be moved downward, thereby fitting onto the surface of the thin shaft 17-4.

[0056] Specifically, the support member 23 also includes a limiting rod 237 set on the top of the sealing sleeve 234. The bottom of the support base 231 is provided with a moving groove 231-3 and a through groove 231-4. The limiting rod 237 slides in the moving groove 231-3. The diameter of the through groove 231-4 is larger than the outer diameter of the limiting rod 237. When the slider 233 slides to the end of the sliding groove 231-2, the limiting rod 237 moves into the through groove 231-4. Under the push of the spring 236, the sealing sleeve 234 can drive the limiting rod 237 to move towards the thin shaft 17-4, so that the sealing sleeve 234 is fitted on the surface of the thin shaft 17-4.

[0057] Pulling the drive handle 235 again will cause the sealing sleeve 234 to move upward, thereby moving the sealing sleeve 234 away from the thin shaft 17-4, allowing the limiting rod 237 to re-enter the through groove 231-4. At this time, pushing the moving sleeve 232 will cause the limiting rod 237 to slide into the moving groove 231-3. Through the limiting of the moving groove 231-3, the limiting rod 237 cannot move into the moving sleeve 232, thereby limiting the sealing sleeve 234 within the moving sleeve 232.

[0058] Example 3:

[0059] Reference Figures 1-11 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0060] Specifically, the adjustment component 3 is installed on the chrome plating component 1. Both the chrome plating component 1 and the support component 2 enter the electroplating tank, while the adjustment component 3 does not. The adjustment component 3 includes a support member 31 installed below the base plate 11. The support member 31 includes a support plate 311 installed at the bottom of the base plate 11. Four insertion posts 312 are fixed to the top of the support plate 311. The base plate 11 has four insertion holes 11-1. The insertion posts 312 are inserted into the insertion holes 11-1, so that the base plate 11 does not overlap with the support plate 31. 1. The bearing plate 311 is rotated. A connecting plate 313 is fixed on the surface of the bearing plate 311. There are four connecting plates 313. The other end of the connecting plate 313 is fixed to the inner wall of the receiving groove 314. A rotating disk 315 is rotatably connected to the bottom of the receiving groove 314. The rotating disk 315 is fixed to the table or the ground, so that the rotating disk 315 can provide support for the receiving groove 314. Since the receiving groove 314 and the rotating disk 315 are rotatably connected, the receiving groove 314 can rotate, which can drive the chrome-plated component 1 to rotate, so as to facilitate the placement or removal of the processed part 17 in the chrome-plated component 1.

[0061] The connecting plate 313 is located on the inner wall of the receiving tank 314, and the connection point is lower than the opening of the receiving tank 314, so that after the chromium plating component 1 is taken out of the electroplating tank, the chromic acid solution it carries will fall into the receiving tank 314 and be collected by the receiving tank 314 to avoid waste.

[0062] Specifically, the adjustment component 3 also includes an adjustment member 32 disposed on the receiving groove 314. The adjustment member 32 includes a fixed seat 321 fixed to the surface of the receiving groove 314. A rotating shaft 322 is rotatably connected inside the fixed seat 321. A bevel gear 323 is fixed to the surface of the rotating shaft 322. A handle 324 is fixed to the other end of the rotating shaft 322. A toothed ring 325 is rotatably connected inside the receiving groove 314. A bevel toothed ring 326 is fixed to the top of the toothed ring 325. The bevel gear 323 and the bevel toothed ring 326 mesh.

[0063] Rotating the handle 324 will drive the rotating shaft 322 to rotate, which in turn drives the bevel gear 323 to rotate, which in turn drives the bevel gear ring 326 to rotate, and the bevel gear ring 326 can drive the gear ring 325 to rotate.

[0064] A support rod 327 is fixed to the top of the connecting plate 313. A rotating sleeve 328 is fitted on the surface of the support rod 327. A driving block 329 is fixed to the surface of the rotating sleeve 328. A rotating seat 3210 is fitted on the surface of the rotating sleeve 328. A gear 3211 is fixed to the top of the rotating seat 3210. The outer diameter of the rotating seat 3210 is larger than the outer diameter of the gear 3211. The gear 3211 meshes with the gear ring 325. A driving groove 3210-1 is opened in the rotating seat 3210. The driving block 329 slides in the driving groove 3210-1.

[0065] When the gear ring 325 rotates, it drives the gear 3211 to rotate, which in turn drives the rotating seat 3210 to rotate. The rotating seat 3210 causes the rotating sleeve 328 to rotate through the driving block 329. The top of the rotating seat 3210 is in close contact with the bottom of the gear ring 325. Due to the obstruction of the gear ring 325, the rotating seat 3210 cannot move upward. By lifting the rotating sleeve 328, the driving block 329 can slide in the driving groove 3210-1.

[0066] A rocker arm 3212 is fixed to the surface of the rotating sleeve 328. A lever 3213 is fixed to the end of the rocker arm 3212. A slot 3213-1 is opened on the surface of the lever 3213. A positioning plate 3214 is fixed to the surface of the rotating seat 3210. A connecting ring 3215 is provided on the surface of the rotating sleeve 328. The rotating sleeve 328 is rotatably connected to the connecting ring 3215.

[0067] When the rotating sleeve 328 rotates clockwise from its current position, the positioning plate 3214 moves toward the top of the base plate 11. When the positioning plate 3214 moves to the top of the base plate 11, it can limit the base plate 11, preventing it from moving away from the bearing plate 311. At this time, as the rotating sleeve 328 rotates, the swing rod 3212 drives the lever 3213 to move the moving sleeve 232, thereby moving the moving sleeve 232 directly above the workpiece 17. Through the elastic force of the spring 236, the sealing sleeve 234 moves downward, thereby fitting onto the surface of the thin shaft 17-4.

[0068] Since the four rotating sleeves 328 can be driven simultaneously by the gear ring 325, all the sealing sleeves 234 can be fitted onto the surface of the thin shaft 17-4 at the same time, thus improving working efficiency.

[0069] When electroplating is complete and the sealing sleeve 234 needs to be removed from the thin shaft 17-4, first rotate the rotating sleeve 328 so that the lever 3213 moves to the other side of the workpiece as shown in the figure. Then, place the chrome plating assembly 1 into the adjusting assembly 3, causing the rotating sleeve 328 to rotate in the opposite direction, thereby moving the slot 3213-1 below the drive handle 235. Since the positioning plate 3214 moves to the top of the base plate 11 at this time, the base plate 11 cannot move away from the bearing plate 311. Pull up the connecting ring 3215, causing the four rotating sleeves 328 to move upward, thereby locking the slot 3213-1. The groove 3213-1 drives the drive handle 235 to move upward, causing the sealing sleeve 234 to move upward, thereby moving the sealing sleeve 234 away from the thin shaft 17-4. This causes the limiting rod 237 to re-enter the through groove 231-4, at which point the sealing sleeve 234 continues to rotate in the opposite direction, which allows the lever 3213 to push the moving sleeve 232. This allows the limiting rod 237 to slide into the moving groove 231-3. Through the limiting of the moving groove 231-3, the limiting rod 237 cannot move into the moving sleeve 232, thereby limiting the sealing sleeve 234 within the moving sleeve 232.

[0070] Example 4:

[0071] Reference Figures 1-11 This is the fourth embodiment of the present invention, which is based on the first three embodiments.

[0072] Specifically, it includes the following steps:

[0073] S1: Workpiece placement and positioning: Insert the base 17-1 of the workpiece 17 to be chrome plated into the placement slots 231-1 of the positioning seat 22 and the support seat 231 respectively to complete the initial positioning;

[0074] S2: Protection of non-chrome-plated areas: The rotating shaft 322 of the rotating adjustment component 3 drives the lever 3213 to move the moving sleeve 232 to directly above the workpiece 17 via the transmission of the bevel gear 323, the gear ring 325, etc. The sealing sleeve 234 sleeves the thin shaft 17-4 under the action of the spring 236, and the positioning seat 22 and the support seat 231 cover the base 17-1;

[0075] S3: Chromium plating operation: Place the chromium plating component 1 into the electroplating tank, so that the main anode of the electroplating tank is connected to the lead ring 14 in the insulating plate 13 receiving tank 13-2, which is connected to the power supply anode. A coating is deposited on the rod 17-2 and the step surface 17-3 under the action of an electric field;

[0076] S4: Workpiece removal: After chrome plating, place the chrome plating component 1 on the adjusting component 3, rotate the rotating shaft 322 in the opposite direction and pull the connecting ring 3215 to disengage the sealing sleeve 234 from the thin shaft 17-4, reset the moving sleeve 232, and finally remove the processed workpiece 17.

[0077] In summary, our invention has the following beneficial effects:

[0078] 1. Improving the uniformity of plating on the step surface 17-3 and the bottom of the rod 17-2, and shortening the electroplating time: This invention provides a lead ring 14 within the receiving groove 13-2 of the insulating plate 13. During electroplating, the lead ring 14 is connected to the power supply anode along with the main anode of the electroplating tank. The lead ring 14 can form an independent auxiliary electric field near the step surface 17-3, covering the shielding area that the main anode cannot reach, and supplementing Cr. 6 The ⁺ ion migration dynamics shorten the migration path and reduce resistance, making the coating thickness in the step surface 17-3 region the same as that in the middle section of the rod 17-2, eliminating the need to extend the electroplating time and solving the problem of low efficiency in existing technologies.

[0079] 2. Simplify the protection operation of non-chrome-plated areas and reduce process time: With the help of the positioning seat 22 and support member 23 of the support component 2, the positioning seat 22 can be inserted into and fixed to the base 17-1 of the workpiece 17 and cover the base 17-1. The support seat 231 of the support member 23 covers the base 17-1 through the placement groove 231-1. At the same time, the sealing sleeve 234 can be sleeved on the thin shaft 17-4 under the action of the spring 236 to achieve the covering. There is no need to manually wrap the base 17-1 and the thin shaft 17-4 with insulating material, which greatly reduces the operation process and the processing time of a single piece.

[0080] 3. Achieving simultaneous operation of multiple processed parts and recovery of chromium plating solution, improving production efficiency and resource utilization: The chromium plating component 1 is designed with multiple insulating plates 13, each of which can simultaneously place multiple processed parts 17. Combined with the gear ring 325, gear 3211 and other structures of the adjustment component 3, multiple rotating sleeves 328 can be driven to operate the lever 3213 to move the sleeve 232 and the sealing sleeve 234, realizing simultaneous positioning and protection of multiple processed parts; at the same time, the receiving groove 314 can collect the chromic acid solution carried by the chromium plating component 1 when it is taken out, avoiding solution waste and pollution, and improving resource utilization.

[0081] When it is necessary to electroplate the rod 17-2, first place the chrome plating component 1 into the adjusting component 3, and make all the inserts 312 inserted into the insertion holes 11-1 of the base plate 11. At this time, the workpiece 17 can be placed in the positioning seat 22 and the support seat 231 respectively.

[0082] Once the workpiece is in place, the handle 324 can be rotated to rotate the rotating shaft 322, which in turn rotates the bevel gear 323. This causes the bevel gear 323 to rotate the bevel ring 326, which in turn rotates the gear ring 325. The gear ring 325 then rotates the four gears 3211, causing the four rotating seats 3210 to rotate. This causes the four rotating sleeves 328 to rotate, which in turn causes the multiple levers 3213 to move the movable sleeve 232, moving it directly above the workpiece 17. Through the elastic force of the spring 236, the sealing sleeve 234 moves downward and fits onto the surface of the thin shaft 17-4. At this time, the bottom of the sealing sleeve 234 presses against the top of the rod 17-2, thus positioning the workpiece 17 and preventing it from moving during electroplating. Simultaneously, both the base 17-1 and the thin shaft 17-4 are blocked from electroplating, eliminating the need for additional wrapping.

[0083] At this point, turn the handle 324 in the opposite direction so that the lever 3213 is moved away from the insulating plate 13, so that the chrome-plated component 1 can be smoothly moved out of the adjusting component 3.

[0084] At this point, the electroplating tank and the lead rings 14 inside the four insulating plates 13 on the lower layer of this application are all connected to the anode of the power supply. The plating process needs to migrate from the main anode, i.e., the wall of the electroplating tank, towards the rod 17-2 to chromium plating the rod 17-2. When the lead ring 14 is connected to the positive terminal of the power supply, it generates its own independent electric field. Its spatial position is close to the step surface 17-3, directly extending the electric field to the shielded area that the main anode cannot reach, i.e., the bottom of the rod 17-2 and the root of the step surface 17-3. This is equivalent to adding an extra small anode near the step surface 17-3, directly supplementing the area. The ion migration dynamics shorten the migration distance, significantly reducing migration resistance, while avoiding shielding interference from the base 17-1; ultimately achieving the "stepped surface 17-3 region" "Increased concentration and faster deposition rate" mean that the coating thickness can be the same as the middle section of rod 17-2, without the need to extend the electroplating time.

[0085] After electroplating is complete, first rotate handle 324 to move lever 3213 to the other side of the workpiece as shown in the diagram. Then, place chrome plating assembly 1 into adjusting assembly 3, causing rotating sleeve 328 to rotate in the opposite direction. This moves slot 3213-1 below drive handle 235. Since positioning plate 3214 has moved to the top of base plate 11, base plate 11 cannot move away from bearing plate 311. Pulling connecting ring 3215 causes the four rotating sleeves 328 to move upward, thereby causing slot 3213-1 to drive drive handle 235 upward. This causes the sealing sleeve 234 to move upward, thus moving it away from the thin shaft 17-4. This allows the limiting rod 237 to re-enter the through groove 231-4. At this point, the sealing sleeve 234 continues to rotate in the opposite direction, causing the lever 3213 to push the moving sleeve 232. This allows the limiting rod 237 to slide into the moving groove 231-3. The limiting effect of the moving groove 231-3 prevents the limiting rod 237 from moving into the moving sleeve 232, thus limiting the sealing sleeve 234 within the moving sleeve 232. At this point, the workpiece 17 can be lifted upward and removed.

[0086] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A chrome-plating auxiliary component for stepped shaft parts, characterized in that: include, A chrome-plated assembly (1) includes a base plate (11), a support column (12) fixed to the top of the base plate (11), an insulating plate (13) fixed to the surface of the support column (12), a through hole (13-1) and a receiving groove (13-2) opened on the insulating plate (13), a lead ring (14) provided in the receiving groove (13-2), a top plate (15) fixed to the end of the support column (12), a bracket (16) fixed to the top of the top plate (15), a machined part (17) provided in the through hole (13-1), and a base (17-1), a rod (17-2), a stepped surface (17-3) and a thin shaft (17-4) provided on the machined part (17). The support assembly (2) is provided on the chrome-plated component (1). The support assembly (2) includes a threaded post (21) fixed to the top of the base plate (11). The surface of the threaded post (21) is rotatably connected to a positioning seat (22) by a thread. The base (17-1) is inserted into the positioning seat (22). The support assembly (2) further includes a support member (23) disposed on the insulating plate (13). The support member (23) includes a support base (231) fixed to the bottom of the insulating plate (13) by bolts. A placement groove (231-1) is provided in the support base (231), and the base (17-1) is inserted into the placement groove (231-1). The support member (23) also includes a movable sleeve (232) disposed at the bottom of the support base (231). A slider (233) is fixed on the top of the movable sleeve (232). A groove (231-2) is provided at the bottom of the support base (231). The slider (233) slides in the groove (231-2). The support member (23) also includes a sealing sleeve (234) disposed inside the movable sleeve (232). A drive handle (235) is fixed on the surface of the sealing sleeve (234). A limiting groove (232-1) is formed on the surface of the movable sleeve (232). The drive handle (235) slides in the limiting groove (232-1). The support member (23) also includes a spring (236) disposed in the sealing sleeve (234), with the two ends of the spring (236) fixed to the inner wall of the sealing sleeve (234) and the inner wall of the movable sleeve (232), respectively.

2. The chrome plating auxiliary assembly for stepped shaft parts as described in claim 1, characterized in that: The support member (23) also includes a limiting rod (237) disposed on the top of the sealing sleeve (234). The bottom of the support base (231) is provided with a moving groove (231-3) and a through groove (231-4). The limiting rod (237) slides in the moving groove (231-3). The diameter of the through groove (231-4) is larger than the outer diameter of the limiting rod (237).

3. The chrome plating auxiliary assembly for stepped shaft parts as described in claim 1 or 2, characterized in that: The system includes an adjustment component (3) disposed on the chrome-plated component (1). The adjustment component (3) includes a support member (31) disposed below the base plate (11). The support member (31) includes a support plate (311) disposed at the bottom of the base plate (11). A pin (312) is fixed on the top of the support plate (311). An insertion hole (11-1) is provided on the base plate (11). The pin (312) is inserted into the insertion hole (11-1). A connecting plate (313) is fixed on the surface of the support plate (311). The other end of the connecting plate (313) is fixed to the inner wall of the receiving groove (314). A rotating disk (315) is rotatably connected to the bottom of the receiving groove (314).

4. The chrome plating auxiliary assembly for stepped shaft parts as described in claim 3, characterized in that: The adjusting assembly (3) further includes an adjusting member (32) disposed on the receiving groove (314). The adjusting member (32) includes a fixed seat (321) fixed to the surface of the receiving groove (314). A rotating shaft (322) is rotatably connected inside the fixed seat (321). A bevel gear (323) is fixed to the surface of the rotating shaft (322). A handle (324) is fixed to the other end of the rotating shaft (322). A gear ring (325) is rotatably connected inside the receiving groove (314). A bevel gear ring (326) is fixed to the top of the gear ring (325). The bevel gear (323) and the bevel gear ring (326) mesh. A support rod (327) is fixed to the top of the connecting plate (313). A rotating sleeve (328) is sleeved on the surface of the support rod (327). A driving block (329) is fixed to the surface of the rotating sleeve (328). A rotating seat (3210) is fitted on the surface of the rotating seat (3210), and a gear (3211) is fixed on the top of the rotating seat (3210). The outer diameter of the rotating seat (3210) is larger than the outer diameter of the gear (3211). The gear (3211) meshes with the gear ring (325). A drive groove (3210-1) is opened in the rotating seat (3210). The drive block (329) slides in the drive groove (3210-1). A rocker arm (3212) is fixed on the surface of the rotating sleeve (328). A lever (3213) is fixed at the end of the rocker arm (3212). A slot (3213-1) is opened on the surface of the lever (3213). A positioning plate (3214) is fixed on the surface of the rotating seat (3210). A connecting ring (3215) is provided on the surface of the rotating sleeve (328). The rotating sleeve (328) is rotatably connected to the connecting ring (3215).

5. A method for chrome plating of stepped shaft parts, comprising the chrome plating auxiliary components for stepped shaft parts as described in any one of claims 1 to 4, characterized in that: Includes the following steps: S1: Workpiece placement and positioning: Insert the base (17-1) of the workpiece to be chrome plated (17) into the placement slots (231-1) of the positioning seat (22) and the support seat (231) respectively to complete the initial positioning; S2: Protection of non-chrome-plated areas: The rotating shaft (322) of the rotating adjustment component (3) drives the lever (3213) to move the moving sleeve (232) to the top of the workpiece (17) via the bevel gear (323) and the gear ring (325). The sealing sleeve (234) is fitted with the thin shaft (17-4) under the action of the spring (236). The positioning seat (22) and the support seat (231) cover the base (17-1). S3: Chromium plating operation: Place the chromium plating component (1) into the electroplating tank, so that the main anode of the electroplating tank is connected to the lead ring (14) in the insulating plate (13-2) receiving tank and the power supply anode is connected. A coating is deposited on the rod (17-2) and the step surface (17-3) under the action of an electric field; S4: Remove the workpiece: After chrome plating, place the chrome plating component (1) on the adjusting component (3), rotate the rotating shaft (322) in the opposite direction and pull up the connecting ring (3215) to make the sealing sleeve (234) disengage from the thin shaft (17-4), the moving sleeve (232) reset, and finally remove the processed workpiece (17).

Images