Bearing frame of general type outside-groove electroplating hanger for cylinder hole

Abstract

The utility model discloses a bearing frame of a universal out-of-groove electroplating hanger for cylinder holes, which adopts a structure that a liquid supply seat track and a pressing track are arranged on the bearing frame, provides possibility for position adjustment and combination of liquid supply seats, and when the bearing frame is used, each liquid supply seat liquid inlet seat corresponds to one cylinder hole, so that the bearing frame is convenient to use. The electroplating device can be used for electroplating air cylinders with different models and cylinder hole numbers, has complete universality, has all the advantages of circulating electroplating outside a tank and the advantage of dynamic electroplating, ensures real-time replacement of positive ions on a plating layer, forms undifferentiated concentration and stable and uniform flowability, and also can be used for electroplating the air cylinders with different models and cylinder hole numbers, so that the electroplating device can be used for electroplating the air cylinders with different models and cylinder hole numbers. The tool is simple in structure and convenient to use, the compactness of a plating layer is well guaranteed, the electroplating quality is guaranteed, the tool can adapt to the electroplating process of cylinder holes of one-cylinder to multi-cylinder engines, the tool does not need to be replaced, the structure is simple, and therefore the working efficiency is improved, and the working cost is reduced.

Description

Technical Field

[0001] This utility model relates to a component of a cylinder electroplating device, and more particularly to a support frame for a universal external electroplating fixture for cylinder bores. Background Technology

[0002] Electroplating inside the engine cylinder forms an anti-wear layer, ensuring the wear resistance of the cylinder bores. In existing technologies, electroplating methods basically include in-tank electroplating and external circulation electroplating. In comparison, the external circulation electroplating process, due to its flowing electroplating environment, ensures the real-time replacement of cations on the coating, uniform concentration, and stable and uniform fluidity, thus ensuring the density and compactness of the coating and ultimately guaranteeing the electroplating quality.

[0003] However, in existing external electroplating structures, due to the varying dimensions of the cylinder blocks (workpieces), the anodes (especially the height) need to be replaced for normal electroplating operations, requiring the entire production line to shut down, increasing losses and production costs. Furthermore, the tooling fixtures are also diverse and complex, requiring manual replacement, reducing work efficiency. To address this, Chinese Patent Z201911244529.7 discloses a scheme utilizing a cylinder diameter compensation structure to accommodate workpieces of different cylinder diameters for electroplating on the same fixture, giving existing tooling structures a degree of versatility. However, with the continuous development of engine technology, especially in motorcycles, there is a growing demand for multi-cylinder engines, and these engines have different standards, varying not only in cylinder diameter but also in the distance between them. Existing cyclic electroplating fixtures are all fixed designs, requiring multiple tooling structures for different multi-cylinder engine blocks. Different cylinder blocks require the removal of the original tooling and replacement with suitable electroplating fixtures, resulting in complex operations, high tooling costs, and extremely low work efficiency.

[0004] Therefore, it is necessary to optimize and improve the existing circulating (dynamic) electroplating equipment and components to enable the electroplating equipment to have all the advantages of external circulating electroplating, as well as complete versatility, to adapt to the electroplating process of cylinder bores of one-cylinder to multi-cylinder engines, and to have a simple structure, be easy to use, and not require the removal of the original tooling, thereby improving work efficiency and reducing work costs. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a support frame for a universal external electroplating fixture for cylinder bores. After being used for external electroplating, the electroplating device has all the advantages of external circulating electroplating, and also has complete universality. It can adapt to the electroplating process of cylinder bores of one-cylinder to multi-cylinder engines. Moreover, it has a simple structure, is easy to use, and does not require the removal of the original tooling, thereby improving work efficiency and reducing work costs.

[0006] This utility model discloses a support frame for a universal external electroplating fixture for cylinder bores. The support frame is provided with a clamping device track and a liquid supply seat track. The clamping device track is used to adjust the position of the clamping device for the electroplating fixture, and the liquid supply seat track is used to adjust the position of the liquid supply seat for the electroplating fixture.

[0007] Furthermore, the liquid supply seat track consists of two tracks, so that when the liquid supply seat is set on the two liquid supply seat tracks, it rests on the liquid supply seat track.

[0008] Furthermore, the support frame is also provided with a main liquid supply channel, which has several branch liquid supply channels. Each branch liquid supply channel is equipped with a liquid supply valve and can be connected to the liquid inlet of the corresponding liquid supply seat during use.

[0009] Furthermore, a main inlet pipe is provided at the bottom of the main liquid supply channel, and the inlet port of the main inlet pipe allows the support frame to be directly and sealed to the outlet of the electroplating solution tank after it is in place.

[0010] Furthermore, the lowest point is where the bottom of the main liquid supply channel connects to the main liquid inlet pipe.

[0011] Furthermore, the support frame is a rectangular frame structure.

[0012] Furthermore, it also includes a return liquid tank, wherein after the support frame is in place, the anode seat of the electroplating fixture is directly opposite the return liquid channel of the return liquid tank; the return liquid tank is provided with an outlet, which is located at the lowest point of the return liquid channel.

[0013] Furthermore, the outlet pipe of the electroplating solution tank is sealed through the bottom of the return tank; the return tank is a rectangular open slot, and after the support frame is in place, the upper part of the return tank encloses the support frame.

[0014] Furthermore, the return channel of a set width is formed inside the return tank by two partitions.

[0015] The beneficial effects of this utility model are as follows: The universal external electroplating fixture for cylinder bores of this utility model has a support frame with a liquid supply seat track and a clamping track on the support frame, which makes it possible to adjust and combine the position of the liquid supply seat. In use, each liquid supply seat corresponds to one cylinder bore. Therefore, different cylinder models and cylinder bore numbers can be electroplated using this utility model, which has complete universality. This utility model not only has all the advantages of external circulation electroplating, but also the advantages of dynamic electroplating. It ensures that the cations on the coating are replaced in real time, forming a uniform concentration and stable and uniform flow, which better ensures the density and compactness of the coating and guarantees the electroplating quality. It can also adapt to the electroplating process of cylinder bores of one-cylinder to multi-cylinder engines without changing tooling. Moreover, the structure is simple and easy to use, thereby improving work efficiency and reducing working costs. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is an overall outline drawing of the application of this utility model to electroplating racks;

[0018] Figure 2 The overall external view of this utility model with the addition of a return tank;

[0019] Figure 3 This is a structural diagram of the support frame of this utility model;

[0020] Figure 4 This is a cross-sectional view of the support frame (including the liquid inlet);

[0021] Figure 5 This is a cross-sectional view of the electroplating unit;

[0022] Figure 6 This is an exploded view of the electroplating unit;

[0023] Figure 7 This is a diagram of the anode structure.

[0024] Figure 8 This is a structural diagram of the clamping device;

[0025] Figure 9 This is a structural diagram of the return tank. Detailed Implementation

[0026] like Figures 1 to 9 As shown: The support frame for the universal external electroplating fixture for cylinder bores in this embodiment is provided with a clamping device track 101 and a liquid supply seat track 102; the clamping device track is used to adjust the position of the clamping device of the electroplating fixture, and the liquid supply seat track is used to adjust the position of the liquid supply seat of the electroplating fixture.

[0027] The following is a technical solution for a complete electroplating apparatus based on this utility model, which is used to illustrate this utility model:

[0028] The electroplating rack includes the support frame 1 and the electroplating device of this utility model;

[0029] The electroplating apparatus includes several electroplating units 3. Each electroplating unit 3 includes a liquid supply component, an electroplating component, and a pressing device 31. The liquid supply component includes a liquid supply seat 301 for introducing electroplating liquid to form a circulating electroplating. The pressing device 31 presses the electroplating component against the liquid supply seat 301 to form the electroplating unit 3.

[0030] The support frame 1 is provided with a pressing device rail 101 and a liquid supply seat rail 102;

[0031] The liquid supply seat 301 is freely placed on the liquid supply seat track 102, forming an adjustable position and allowing the liquid supply seats 102 to be combined. The combination state means that it can be adjusted according to the number of cylinder holes on the cylinder body and the distance between the cylinder holes to achieve versatility. The clamping device 31 is installed in the clamping device track in an adjustable position to adapt to the positional relationship between the liquid supply seats and achieve clamping. Since it needs to withstand the pressure of the clamping device and the weight of the electroplating unit, the liquid supply seat track 102 can be two tracks that jointly support the liquid supply seats, or it can be a single track with a set width to support the liquid supply seats and can be limited by a lateral limiting design to achieve the purpose of the utility model.

[0032] As shown in the figure, the support frame 1 is a frame structure. Supports and beams need to be added according to the mechanical load-bearing requirements, which will not be elaborated here. The upper part of the frame structure of the support frame 1 is fixed with a clamping device rail 101, and the lower part is fixed with a liquid supply seat rail 102. The clamping device rail 101 and the liquid supply seat rail 102 also serve as beam reinforcement. They are parallel in space, allowing the adjustment of the liquid supply seat position and the clamping device position to be in the same direction. In this invention, the liquid supply seat 301 forms the bottom component of the electroplating unit. During use, the positions of the liquid supply seats 301 of the two electroplating units determine the positional relationship between the electroplating components. Therefore, when electroplating the cylinder bores of different multi-cylinder engines, only the position of the liquid supply seats needs to be adjusted. The positional relationship is sufficient, the structure and operation process are simple, improving work efficiency while eliminating the need for disassembly and tooling replacement, thus saving process costs. Furthermore, unlike existing technologies where electroplating fixtures are fixed in place and the basket carrying the workpiece is placed on the workstation during use, in this invention, the liquid supply seat 301 is located on the support frame 1, making it easy to adjust its position to adapt to different cylinder requirements. When pressed against the workpiece, it also ensures a sealing effect. During use, the support frame, liquid supply seat, and workpiece are lifted together and placed on the electroplating station (at which point only basic general equipment such as the electroplating solution tank is needed) for electroplating. Of course, once in place, the required power supply is connected, which can be accomplished using existing technologies and will not be elaborated further here.

[0033] Electroplating components generally include an anode 304 and an anode holder 303 (the anode holder is a hollow tube, which can be separate from the anode or integrally formed). Typically, the anode 304 is mounted on the anode holder 303, which passes through a liquid supply seat 301. The liquid supply seat 301 introduces the electroplating solution into the outside of the anode holder 303 and between the outside of the anode 304 and the cylinder hole of the workpiece 4. The electroplating solution that has completed electroplating enters the center of the anode 304 from the top and is led out through the central hole of the anode holder 303, flowing back to the electroplating solution tank. This is a general structure of circulating electroplating, which will not be described in detail here.

[0034] In this embodiment, the liquid supply seat track 102 is arranged in two parallel sections, and the liquid supply seats of several electroplating units are arranged in parallel along the length of the liquid supply seat track 102. The liquid supply seat 301 is provided with two flanges corresponding to the two liquid supply seat tracks, and the liquid supply seat is supported on the liquid supply seat track through the flanges. As shown in the figure, the liquid supply seat is square columnar in shape, and the longitudinal section (at least in the direction perpendicular to the liquid supply seat track) is approximately T-shaped (other shapes can be formed below the flanges as needed, which together with the flanges form a T-shape). In use, the flanges on both sides rest on the corresponding liquid supply seat track 102, and the body of the lower part of the flange of the liquid supply seat abuts against the two liquid supply seat tracks to ensure the stability of the installation. In use, after installing the electroplating components and the workpiece 4, it can be pressed by the clamping device 31. It is convenient and quick to use, and the position adjustment is also relatively convenient.

[0035] In this embodiment, the support frame 1 is also provided with a main liquid supply channel 103, which is generally located close to the liquid supply seat track 102 to ensure a shorter electroplating solution delivery distance. The main liquid supply channel 103 is provided with several liquid supply branch channels 104, and each liquid supply branch channel 104 is provided with a liquid supply valve 1041 and can be connected to the liquid inlet of the corresponding liquid supply seat 301. As shown in the figure, the main liquid supply channel 103 can be a pipe structure parallel to the liquid supply seat track 102, and can be a square pipe structure or a circular pipe. The channel structure, etc., can extend in length to the length direction that the liquid supply seat 301 can distribute. The liquid supply branch channel 104 is equipped with a liquid supply valve 1041. When the liquid supply seat 301 (electroplating unit) is idle, the liquid supply valve is closed. Of course, the liquid supply branch channel 104 is generally formed by a flexible hose to ensure adaptability to the position adjustment of the liquid supply seat. The liquid supply seat 301 is equipped with a pipe connector 3011 for connecting with the branch channel. As shown in the figure, the pipe connector 3011 is tilted downward to avoid the liquid supply seat track 102, which will not be described in detail here.

[0036] In this embodiment, a main inlet pipe 105 is provided at the bottom of the main liquid supply channel 103. The inlet port of the main inlet pipe 105 allows for direct sealing and communication with the outlet pipe 203 of the electroplating solution tank after the support frame is in place. The main inlet pipe 105 is a pipe that introduces the electroplating solution from the electroplating solution tank into the main liquid supply channel 103. It has an inlet port from which the electroplating solution is introduced. The electroplating solution tank is provided with an outlet pipe 203 (generally connected to the outlet of the electroplating solution pump). After the support frame 1 is in place, the main inlet pipe 105 directly mates with the outlet pipe 203 of the electroplating solution tank. As shown in the figure, the main inlet pipe 105 is vertically arranged with the lower port being the inlet port and having a conical opening. The outlet pipe 203 is vertically arranged with the upper port having a conical opening. After the support frame is in place, the upper port of the outlet pipe is directly inserted into the lower port of the main inlet pipe to form a conical mating pair, thereby completing the sealed connection. The structure is simple and easy to operate.

[0037] In this embodiment, the liquid supply base 301 has a drainage cavity 3013 for introducing electroplating solution through the liquid inlet. The anode 304 of the electroplating assembly passes downward and seals through the bottom of the drainage cavity, as shown in the figure. The bottom of the drainage cavity of the liquid supply base 304 is provided with a hole for the anode seat 303 to pass through. When passing through, a seal is formed by existing technology, such as threaded connection or sealing filler, etc. The threaded connection can also ensure the stability of the anode seat installation and help ensure the coaxiality of the anode, which will not be elaborated here. The liquid supply assembly also includes a flow guide 302 disposed in the drainage cavity and sleeved on the anode seat 303. The flow guide 302 has flow distribution holes 30 The flow-guiding section 21 has flow-distributing holes 3021 distributed around the anode seat 303, as shown in the figure. The flow-guiding cavity is a cylindrical cavity, and the flow-guiding section is also cylindrical. After placement, the outer edge of the flow-guiding section fits against the side wall of the flow-guiding cavity, thus forming a stable mating structure and providing a sealing effect, ensuring that all electroplating solution must flow into the electroplating environment through the flow-distributing holes. In this invention, the electroplating solution is introduced between the anode and the workpiece through the flow-distributing holes 3021, which can ensure the uniform and stable flow of the electroplating solution and make the effective ion distribution in the electroplating environment uniform, thereby achieving the desired electroplating effect. The liquid inlet is located at the lower part of the flow-guiding section and is connected to the flow-guiding cavity 3013.

[0038] In this embodiment, the lowest point is where the bottom of the main liquid supply channel 103 connects with the main liquid inlet pipe 105. When the electroplating process stops, the electroplating environment and the electroplating solution in the channel flow back to the main liquid inlet pipe 105 by gravity, and then back to the electroplating solution tank. As shown in the figure, the bottom of the main liquid supply pipe 103 is an inclined structure, and the lowest point of the inclined bottom is where the main liquid inlet pipe 105 connects with the main liquid supply channel. Of course, the main liquid supply channel can also be a pipe installed at an incline on the support frame, which can also achieve the purpose of the utility model. It also includes a return liquid tank 2. After the support frame 1 is in place, the anode seat 303 is directly opposite the return liquid channel 201 of the return liquid tank 1. As shown in the figure, the return liquid tank 2 is a rectangular open slot. The overall structure can horizontally encompass the support frame. Inside, two partitions form a return channel 201 of a set width. The anode seat 303 passes through the bottom of the drainage cavity and faces the return channel 201. The return tank is provided with an outlet, which is located within the return channel 201 and at its lowest point. The purpose of the utility model is achieved by tilting the bottom inner surface of the return tank 2, which will not be elaborated here. In use, the return tank 2 is located at the work station, and the outlet pipe 203 of the electroplating solution tank passes through the bottom of the return tank in a sealed manner. After the support frame 1 is in place, the return tank 2 encompasses the support frame 1 from below, which can effectively ensure that all electroplating solution of the entire fixture is sealed in time and that no leakage will occur.

[0039] In this embodiment, the flow guide 302 is a T-shaped sleeve that fits over the anode seat 303. A T-shaped sleeve refers to a sleeve with a T-shaped cross-section in the vertical direction, which will not be elaborated further here. The flange of the T-shaped sleeve is the flow guide portion, and the flow distribution holes 3021 are evenly distributed on the flange of the T-shaped sleeve. A V-shaped annular groove 3022 is formed on the end face of the flow guide portion corresponding to the flow distribution holes 3021, and the bottom of the V-shaped annular groove 3022 corresponds to the flow distribution hole. As shown in the figure, the T-shaped sleeve is a cylindrical structure. The upper end is bent outward to form an annular flange, which is simple and compact in structure and stable and easy to install with the anode 304. Unlike the existing inner circle of the drainage part, which has a large upper and small lower conical surface, the outlet of the flow distribution hole 3021 is located at the bottom of the V-shaped groove. After the electroplating solution is drained, the electroplating solution is fully buffered along the V-shaped groove and dispersed into the drainage cavity, forming a more uniform and stable electroplating solution. This further avoids the electroplating solution flowing out of the flow distribution hole 3021 from causing local instability to the electroplating environment.

[0040] In this embodiment, the anode 304 of the electroplating assembly is mounted on or integrally formed with the anode holder 303, and includes a working part 3041 and a functional part 3042. The working part 3041 is used to form an electroplating environment, and the functional part 3042 extends upward to introduce anode current. The functional part 3042 has a hollow structure, which is used to introduce the electroplating solution of the electroplating environment into the center of the anode and lead it out and return it from the anode holder. In this embodiment, at least two windows of a predetermined area are opened upward from the position where the working part of the anode extends to the functional part to form a hollow part, which will not be described in detail here. As shown in the figure, in this embodiment, the anode holder 303 and the anode 304 are separate. The anode seat 303 is a hollow columnar structure. The anode seat 303 is inserted upwards into the anode 304, and its outer circumference has an annular protrusion. This annular protrusion abuts against the lower end face of the anode, thus limiting its position. Simultaneously, the anode seat passes downwards through the flow guide 302, with the annular protrusion abutting against the upper end face of the flow guide 302. The lower end face of the flow guide 302 is placed at the bottom of the drainage cavity, thus forming a stable support from bottom to top. To ensure that the electroplating solution flows into the electroplating environment through the distribution holes 3021, the fit between the anode seat 303 and the flow guide 302, and between the flow guide 302 and the wall of the drainage cavity 3013, must be tight, or necessary sealing measures must be adopted. These details will not be elaborated further here.

[0041] As shown in the figure, the clamping device 31 is suspended from the clamping device track 101 by a clamping device seat 3107. The clamping device seat 3107 includes a rectangular seat groove that opens upward and is contained within the clamping device track from bottom to top, and a suspension part located at the upper part of the rectangular seat groove and bent inward and locked onto the upper surface of the clamping device track. As shown in the figure, the clamping device 31 includes a clamping rod that can be driven to reciprocate up and down, and a lever assembly for driving the clamping rod 3102 to reciprocate. The lower end of the clamping rod 3102 is provided with... A clamping plate (e.g., threaded connection) is available for height adjustment on the clamping rod 3102 to accommodate different workpiece heights. The lever assembly includes a drive lever 3104 (forming a bent structure with the fulcrum as a reference) and a rocker arm 3105. The upper end of the clamping rod 3102 is rotatably hinged to the resistance end of the lever 3104, and the upper end of the rocker arm 3105 is coaxially hinged to the fulcrum of the drive lever 3104, allowing for single-degree-of-freedom rotation. As shown in the figure, the rocker arms 3105 consist of two separate levers on the left and right sides, with two rocker arms 3105... A limiting block 31051 (usually integrally formed) is fixed between 05. This limiting block restricts the lever from rotating further in the pressing direction when the driving lever 3104 drives the clamping rod to clamp the workpiece. The lower end of the rocker arm is hinged to a base. The rocker arm consists of two arms arranged on both sides of the base, with their lower ends coaxially hinged to the base. When the clamping rod clamps the workpiece through the clamping part, the axes of the clamping rod intersect with or extend backward beyond the axis of the fulcrum. At this time, the limiting block 31051 abuts against the driving lever from the back. The lever arm; as shown in the figure, the driving lever 3104 is a right-angle structure with the fulcrum as the boundary. The resistance arm forms a fork-shaped groove and the clamping rod 3102 is located in the fork-shaped groove and hinged to the end of the resistance arm. The fork-shaped structure is conducive to stable connection and does not apply bias force, thereby making the structure stable and having a long service life. As shown in the figure, the driving lever 3104 is a right-angle structure with the fulcrum as the boundary (i.e., the power arm and the resistance arm are at a right angle). That is, at the fulcrum, the angle is turned and the power arm bends forward, which is convenient for operation and does not interfere with the rocker arm (limiting block).

[0042] As shown in the figure, the base 3103 includes a base plate and a guide sleeve, which are detachably connected and fixed. Both have through holes for the clamping rod 3102 to pass through. The base plate is detachably fixed to the rectangular seat groove by two connecting rods, which has strong adaptability. The guide sleeve is fixed to the base plate by a threaded connection, which is simple in structure. As shown in the figure, the lower end of the guide sleeve is machined with an external thread and screwed onto the internal thread on the base plate to form a connection. To prevent it from coming off, a lock nut is used for locking. The lower end of the rocker arm is hinged to the guide sleeve. The structure is simple and practical. The entire locking assembly forms a module. The hinge part is completely machined before being installed on the base plate.

[0043] In this invention, "backward" refers to the direction in which the power arm swings when the drive lever clamps the workpiece, and "back side" is the side corresponding to "backward," which will not be elaborated further here.

[0044] Due to the action of the limiting block, the resistance wall of the lever is prevented from continuing to rotate, and the rocker arm is also unable to continue to rotate under the action of the limiting block, thus forming an interlock. Furthermore, the axis of the clamping rod intersects with or extends backward beyond the axis of the fulcrum (generally, just intersecting is sufficient), thus forming a stable retraction mechanism to prevent loosening.

[0045] The reciprocating motion of the clamping rod is generally a single degree of freedom, meaning it only moves back and forth. The upper end of the rocker arm is hinged to the fulcrum of the drive lever via a fulcrum hinge axis. Under the action of external force, the drive lever rotates around the fulcrum, causing the resistance arm to move from the lateral direction to a near-vertical position. This drives the clamping rod downward to clamp the workpiece. The rocker arm swings forward around its lower end under the lateral constraint (no displacement) of the clamping rod. When the resistance arm clamps the workpiece, the axis of the fulcrum is at least intersecting the axis of the fulcrum hinge or extends backward beyond the hinge axis, thus forming a self-locking mechanism. This prevents the lever from rotating under the reaction force. At the same time, the limiting block restricts the lever from continuing to rotate in the clamping direction, preventing further rotation and thus driving the clamping rod upward, forming a clamping self-locking mechanism (i.e., the mechanical structure composed of the clamping rod and the drive lever is similar to a connecting rod and crank structure, but due to the limiting block, it avoids forming a circular motion similar to a connecting rod and crank, thus forming a self-locking mechanism).

[0046] In this embodiment, a transition ring 305 is also included. The clamping device uses the transition ring 305 to press the electroplating assembly against the liquid supply seat 301. The transition ring has a functional notch, through which the anode power supply is connected to the functional part of the anode during use. As shown in the figure, the transition ring 305 is a columnar ring. During use, it is sleeved on the anode with its lower end pressing against the workpiece, and its upper end is pressed down by the clamping plate of the clamping device, thereby forming a stable electroplating environment. The purpose of the functional notch of the transition ring is to easily clamp the power supply to the functional part of the anode. At the same time, different transition rings can be adapted to different cylinders. During use, it is also necessary to use other existing structures, such as a lower shielding ring 308 between the liquid supply seat 301 and the workpiece 4. A compensation ring 309 is also required. Both the lower shielding ring 308 and the compensation ring 309 can be replaced according to different cylinder bore diameters. The liquid inlet seat 301 is a universal structure. The compensation ring 309 serves as both a centering structure (corresponding to the positioning holes or bolt holes on the workpiece to form a positioning) and a sealing structure to center the workpiece, ensuring that the workpiece and the anode are coaxial and sealed simultaneously, thereby guaranteeing electroplating quality. This will not be elaborated further. The upper part of the workpiece needs to be equipped with an upper shielding ring 306, a sealing structure 307, and a centering sleeve to ensure that the upper shielding ring 306 is coaxial with the workpiece and provides a seal, thereby guaranteeing electroplating quality. This will not be elaborated further. The working principle of the compensation ring is an existing technical solution, that is, different compensation rings have the same outer diameter, and their inner diameter corresponds to different cylinder bore diameters, thereby achieving compensation. This will not be elaborated further. The function and structure of the shielding ring are existing technical solutions and will not be elaborated further.

[0047] In use, the fixture of this invention, i.e., the support frame 1 for mounting the workpiece, electroplating components, and liquid inlet seat 301, is moved to the electroplating station. Upon arrival at the electroplating station, the fixture is placed directly on the station. The liquid inlet main pipe on the fixture is directly inserted (conical mating pair) to form a connection with the liquid outlet pipe of the electroplating tank. The anode seat is directly opposite the return tank. After completing the preparation work, electroplating can begin. Of course, the station should be equipped with a positioning structure that cooperates with the positioning structure on the support frame to ensure accurate positioning, thereby ensuring the connection between the liquid inlet main pipe and the liquid outlet pipe and the conductive structure, thus enabling the electroplating process to proceed smoothly.

[0048] This utility model's tooling adopts an integrated modular design, with the electroplating environment pre-delivered to the workstation. The electroplating units can be arbitrarily combined to adapt to cylinders with different numbers of bores and different sizes of bores. Installation and positioning are convenient, facilitating automated external electroplating and significantly improving work efficiency. In this utility model's structure, replacing components such as the anode is easy and simple. Since the anode and anode holder are separate structures with a coaxial insertion fit (of course, the insertion fit requires a set clearance to prevent excessive leakage of electroplating solution), replacing the anode is as simple as removing it directly from the anode holder. Therefore, this utility model is completely universal for external electroplating of cylinders, suitable for workpieces of various sizes, models, and numbers of bores, achieving seamless product switching, avoiding production capacity loss due to line downtime, quickly meeting delivery requirements, minimizing changeover time for mature products, and reducing production capacity loss to a minimum.

[0049] The external electroplating of this utility model refers to dynamic electroplating achieved by forming an electroplating solution circulation outside the electroplating solution tank, which will not be described in detail here.

[0050] This embodiment uses an engine cylinder block as an example. In fact, the technical solution claimed by this utility model is not limited to an engine cylinder block. It can also be a compressor cylinder, a plunger pump cylinder block, or other cylinder blocks with similar structures, which will not be elaborated here.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model 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 this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A support frame for a universal external electroplating fixture for cylinder bores, characterized in that: The support frame is equipped with a clamping device track and a liquid supply seat track; the clamping device track is used to adjust the position of the clamping device for the electroplating fixture, and the liquid supply seat track is used to adjust the position of the liquid supply seat for the electroplating fixture.

2. The support frame for the universal external electroplating fixture for cylinder bores according to claim 1, characterized in that: The liquid supply seat track consists of two tracks, so that when the liquid supply seat is set on the two liquid supply seat tracks, it rests on the liquid supply seat track.

3. The support frame for the universal external electroplating fixture for cylinder bores according to claim 1, characterized in that: The support frame is also provided with a main liquid supply channel, which has several branch liquid supply channels. Each branch liquid supply channel is equipped with a liquid supply valve and can be connected to the liquid inlet of the corresponding liquid supply seat during use.

4. The support frame for the universal external electroplating fixture for cylinder bores according to claim 3, characterized in that: The bottom of the main liquid supply channel is provided with a main liquid inlet pipe, and the liquid inlet port of the main liquid inlet pipe allows the support frame to be directly and sealed to the liquid outlet port of the electroplating bath after it is in place.

5. The support frame for the universal external electroplating fixture for cylinder bores according to claim 4, characterized in that: The lowest point is where the bottom of the main liquid supply channel connects to the main liquid inlet pipe.

6. The support frame for the universal external plating fixture for cylinder bores according to claim 5, characterized in that: The support frame is a rectangular frame structure.

7. The support frame for the universal external electroplating fixture for cylinder bores according to claim 1, characterized in that: It also includes a return tank. After the support frame is in place, the anode seat of the electroplating fixture is directly opposite the return channel of the return tank. The return tank is provided with an outlet, which is located at the lowest point of the return channel.

8. The support frame for the universal external plating fixture for cylinder bores according to claim 7, characterized in that: The outlet pipe of the electroplating solution tank is sealed and passes through the bottom of the return tank; the return tank is a rectangular open slot, and after the support frame is in place, the upper part of the return tank encloses the support frame.

9. The support frame for the universal external electroplating fixture for cylinder bores according to claim 7, characterized in that: The return liquid tank is formed by two partitions to create a return liquid channel of a set width.

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