A device for chrome plating a screw surface

Abstract

This utility model provides a chromium plating device for screw surfaces, relating to the field of metal surface treatment technology. The device includes an electroplating tank, a placement section for placing the screw to be treated and controlling the spacing between adjacent screws, and a traction section mounted on the electroplating tank. The traction section can pull the placement section, allowing it to enter or exit the electroplating tank. During use, the device uses a limiting plate and movable slots to compress springs, lowering the height of all movable slots and facilitating screw placement. Once the placement frame enters the electroplating tank, the springs recover some length due to the lack of compression from the limiting plate, increasing the spacing between adjacent screws. This reduces the impact of close proximity during electroplating, ensuring coating quality and good performance.

Description

Technical Field

[0001] This utility model relates to the field of metal surface treatment technology, specifically a chromium plating device for screw surfaces. Background Technology

[0002] Chrome plating the surface of the screw can improve its surface hardness and extend its service life. Chrome plating requires a chrome plating device. Existing chrome plating devices include an electroplating tank, a placement rack, and a lifting platform. The placement rack is used to place the screw, and the lifting platform can move the placement rack up and down in the electroplating tank. However, since the height of the screw on the placement rack does not change, the screws at the higher positions on the placement rack are quite high off the ground. This makes it inconvenient for workers to place or remove the screws from the placement rack, and sometimes a platform is needed, which is difficult to meet the usage requirements. Utility Model Content

[0003] The purpose of this invention is to provide a chromium plating device for screw surfaces, which aims to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: the screw surface chrome plating device includes:

[0005] Electroplating tank;

[0006] The placement section is used to place the screws to be processed, and the spacing between two adjacent screws can be controlled.

[0007] The traction unit is disposed on the electroplating tank and can be used to pull the placement unit, so that the placement unit can enter into the electroplating tank or move the placement unit out of the electroplating tank.

[0008] Preferably, the placement part includes a placement frame, and a set of fixed support units and at least one set of movable support units are provided on both sides of the placement frame. The fixed support unit includes two fixed slots, which are located at the bottom of both sides of the placement frame. The movable support unit includes two movable slots. A through slot is provided on the side of the placement frame, and a fixed rod is provided inside the through slot. The movable slot is slidably connected to the fixed rod, and a spring is sleeved on the fixed rod, with the spring located below the movable slot.

[0009] Preferably, the inner surfaces of the fixed groove and the movable groove are uniformly provided with protrusions.

[0010] Preferably, the traction unit includes a support frame mounted on the electroplating tank, a mounting box mounted on the support frame, a take-up drum inside the mounting box, and a drive device for rotating the take-up drum outside the mounting box. The support frame has a through groove, and a fixed pulley is mounted on the support frame and located on one side of the through groove. The unit also includes a connecting rope, one end of which is fixedly connected to the placement frame, and the other end of which passes through the through groove, wraps around the fixed pulley, and is wound and fixed to the take-up drum. A guide rod that is slidably connected to the placement frame is provided between the electroplating tank and the support frame.

[0011] Preferably, the support frame is provided with limit plates on both sides.

[0012] The beneficial effects of this utility model are:

[0013] When in use, this chrome plating device compresses the springs through the limiting plate and movable slots, thereby reducing the height of all movable slots. This makes it easier for workers to place the screws into the movable slots. After the placement frame enters the electroplating tank, due to the lack of compression from the limiting plate, the springs can partially recover their length, thereby increasing the distance between two adjacent screws. This reduces the impact of different screws being too close together during electroplating, ensuring the quality of the plating layer and resulting in good performance. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.

[0015] Figure 2 This is a schematic diagram of the internal structure of the electroplating tank.

[0016] Figure 3 This is a structural diagram of the placement section.

[0017] Figure 4 This is a top view of a specific embodiment of the present invention.

[0018] Figure 5 This is a schematic diagram showing the placement part located inside the electroplating tank.

[0019] Figure 6 This is a schematic diagram showing the placement part located outside the electroplating tank.

[0020] Figure 7 This is a schematic diagram of the movable groove.

[0021] In the diagram: 1. Electroplating tank; 2. Screw; 3. Placement frame; 4. Fixed groove; 5. Movable groove; 6. Fixed rod; 7. Spring; 8. Protrusion; 9. Support frame; 10. Mounting box; 11. Winding drum; 12. Drive device; 13. Fixed pulley; 14. Connecting rope; 15. Guide rod; 16. Limiting plate. Detailed Implementation

[0022] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0023] like Figure 1-7 As shown, a chrome plating device for a screw surface includes:

[0024] Electroplating tank 1;

[0025] The placement section is used to place the screw 2 to be processed, and can control the spacing between two adjacent screws 2.

[0026] The traction unit is installed on the electroplating tank 1. The traction unit can be used to pull the placement unit, so that the placement unit can enter into the electroplating tank 1 or move the placement unit out of the electroplating tank 1.

[0027] Electroplating tank 1 is existing technology. It has functions such as conductivity, temperature control, stirring, and filtration. It can also be connected to external equipment, such as having power interface, inlet and outlet, liquid level detection and control functions.

[0028] The electroplating tank 1 contains an electroplating solution, which can be a chromate electroplating solution or a trivalent chromium electroplating solution.

[0029] Furthermore, the placement part includes a placement frame 3. A set of fixed support units and at least one set of movable support units are provided on both sides of the placement frame 3. The fixed support unit includes two fixed grooves 4, which are located at the bottom of both sides of the placement frame 3. The movable support unit includes two movable grooves 5. A through groove is opened on the side of the placement frame 3. A fixed rod 6 is provided inside the through groove. The movable groove 5 is slidably connected to the fixed rod 6. A spring 7 is sleeved on the fixed rod 6, and the spring 7 is located below the movable groove 5.

[0030] When placing the screw 2, it needs to be placed in one of the two fixed slots 4 or two movable slots 5 at the same horizontal level. The mass of a single screw 2 is about 8-10 kg. The spring 7 is a hard spring 7, which is not easily deformed when bearing the weight of the screw 2. In this application, there are two sets of movable support units. When the screw 2 is placed on both sets of movable support units, the compression degree of the upper spring 7 is less than 5%, and the compression degree of the lower spring 7 is less than 10%. Through the support of the spring 7, the three screws 2 can be kept at a greater distance, so as to ensure uniform current distribution, reduce shielding effect, improve current efficiency, and improve coating quality.

[0031] The spring 7 is made of metal and has an insulating rubber coating on its surface. The placement frame 3, the fixing groove 4, the movable groove 5, and the fixing rod 6 are all made of engineering plastic. The fasteners used in the placement part are all made of metal, but have an insulating rubber coating on their surface.

[0032] Furthermore, the inner surfaces of the fixed groove 4 and the movable groove 5 are uniformly provided with protrusions 8. The protrusions 8 are used to reduce the contact area between the fixed groove 4 and the movable groove 5 and the screw 2, thereby improving the quality of the coating on the surface of the screw 2.

[0033] Furthermore, the traction unit includes a support frame 9 mounted on the electroplating tank 1, a mounting box 10 mounted on the support frame 9, a take-up drum 11 inside the mounting box 10, and a drive device 12 for rotating the take-up drum 11 outside the mounting box 10. The support frame 9 has a through groove, and a fixed pulley 13 is mounted on the support frame 9 and located on one side of the through groove. It also includes a connecting rope 14, one end of which is fixedly connected to the placement frame 3, and the other end of which passes through the through groove, passes over the fixed pulley 13, and is wound and fixed to the take-up drum 11. A guide rod 15 that is slidably connected to the placement frame 3 is provided between the electroplating tank 1 and the support frame 9. Limiting plates 16 are provided on both sides of the support frame 9.

[0034] When the placement frame 3 is placed into the electroplating tank 1 or removed from the electroplating tank 1, the drive device 12 needs to be started first. The drive device 12 is a motor, which has a reducer module and a brake module. When the motor stops, the brake module can restrict the output end of the motor to prevent it from rotating. The motor is controlled by the controller. When the motor starts, it can drive the winding drum 11 to rotate. The winding drum 11 can wind or unwind the connecting rope 14. When the connecting rope 14 is wound, it can drive the placement frame 3 to move vertically upward along the guide rod 15. When the connecting rope 14 is unwound, it can drive the placement frame 3 to move vertically downward along the guide rod 15.

[0035] When the placement frame 3 moves vertically upward along the guide rod 15, when the uppermost movable slot 5 contacts the limiting plate 16, as the placement frame 3 continues to move upward, the uppermost placement slot cannot follow the placement frame 3 to continue moving upward and squeezes the spring 7. At the same time, the pressure is transmitted to the lower spring 7, causing the lower spring 7 to also be squeezed. When the placement frame 3 moves to the highest point and cannot move further, the distance between the two movable slots 5 above the fixed slot 4, as well as the distance between the fixed slot 4 and its adjacent movable slot 5, remains relatively close. This reduces the height of the screw 2 on the placement frame 3, making it easier for workers to remove the screw 2 and place it on the placement frame 3. After the screw 2 is placed on the placement frame 3, when the placement frame 3 moves downward, the spring 7 will gradually extend, thereby increasing the distance between the two adjacent screws 2 to reduce the impact during electroplating and ensure the quality of the plating layer.

[0036] The connecting rope 14 is a steel wire rope with a rubber coating on its surface to improve its insulation.

[0037] A distance sensor is installed on the support frame 9. The distance sensor can control the rising position of the placement frame 3. When the placement frame 3 rises to the predetermined height, the motor can be stopped manually or by controlling the motor to stop via the distance sensor.

[0038] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A device for chrome plating the surface of a screw, characterized in that, include: Electroplating tank; The placement section is used to place the screws to be processed, and the spacing between two adjacent screws can be controlled. The placement part includes a placement frame, and a set of fixed support units and at least one set of movable support units are provided on both sides of the placement frame. The fixed support unit includes two fixed slots, which are located at the bottom of both sides of the placement frame. The movable support unit includes two movable slots. A through slot is opened on the side of the placement frame, and a fixed rod is provided inside the through slot. The movable slot is slidably connected to the fixed rod. A spring is sleeved on the fixed rod, and the spring is located below the movable slot. The traction unit is disposed on the electroplating tank and can be used to pull the placement unit, so that the placement unit can enter into the electroplating tank or move the placement unit out of the electroplating tank. The traction unit includes a support frame mounted on the electroplating tank, a mounting box mounted on the support frame, a take-up drum inside the mounting box, and a drive device for rotating the take-up drum outside the mounting box. The support frame has a through groove, and a fixed pulley is mounted on the support frame and located on one side of the through groove. It also includes a connecting rope, one end of which is fixedly connected to the placement frame, and the other end of which passes through the through groove, wraps around the fixed pulley, and is wound and fixed to the take-up drum. A guide rod that is slidably connected to the placement frame is provided between the electroplating tank and the support frame.

2. The screw surface chromium plating device according to claim 1, characterized in that, The inner surfaces of the fixed groove and the movable groove are uniformly provided with protrusions.

3. The screw surface chromium plating device according to claim 1, characterized in that, Limiting plates are provided on both sides of the support frame.

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