Air guide type stacking and hanging device for local chromium plating of special-shaped parts

Abstract

The utility model relates to a gas guide type stacking and hanging device for local chromium plating of special-shaped parts, and belongs to the technical field of electroplating. The stacking and hanging device comprises a cover plate assembly (1) with a hook, a lower cover plate assembly (2), a positioning disc (3), a protective sleeve (4) with an edge, a round nut (5), a transition sleeve (6), a long bolt (8), a gasket (9), a hexagon nut (10) and a hexagon bolt (11). According to the electroplating bath, the influence of bubbles generated during electroplating in the bath on parts can be fundamentally eliminated, the phenomena of piebald and chromium running are avoided, the plating quality of the plated parts is ensured, and batch qualified production operation is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of electroplating, and in particular relates to an air-conducting type stacking hanging device for local chrome plating of special-shaped parts. Background Art

[0002] The wraparound oil baffle is an important part of the tracked vehicle's road wheel and suspension device. It is used in a harsh environment, has strict part size tolerances, and has high anti-corrosion requirements. The part is a stepped cylindrical annular part, and the outer shape is protected by phosphating and painting. The inner wall φ135H8 annular groove surface is partially chrome-plated, and the thickness of the chrome layer is 0.05-0.07. There is no transition sleeve between the existing hanger parts. The parts are stacked and hung on the hanger, and a rubber protective cover is buckled up and down and fixed with screws to protect the non-chrome-plated parts of the inner hole. In the actual production process, some parts have quality problems. First, the root of the plated ring groove of the workpiece cannot be chrome-plated; second, there is chrome running on the workpiece (that is, a chrome layer appears on the part that should not be chrome-plated). The workpiece produced on site needs to be re-chrome-removed and reworked for rectification.

[0003] The parts are stacked upside down on the hanger without a transition sleeve between the hung parts. During the plating process, the chrome plating generates exchange gas, forming a continuous stream of bubbles. Air pockets are easily formed between the reversed parts and the normal parts, resulting in the inability to effectively peel off and discharge the gas from the surface of the plated parts in time. In addition, the existing rubber material protective cover is buckled up and down and fixed with screws. In actual production, due to repeated disassembly and assembly and the alternation of temperatures in each tank, the protective cover threads are buckled and deformed, resulting in air pockets and liquid pockets, and the appearance of mottling, local chromium deficiency and plating run. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The technical problem to be solved by the utility model is how to provide an air-conducting stacking hanging device for partial chrome plating of special-shaped parts, so as to solve the problem that bubbles generated during electroplating in a tank affect the parts.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the utility model provides an air-conducting stacking device for partial chrome plating of special-shaped parts, the stacking device comprising: a cover plate assembly with hooks (1), a lower cover plate assembly (2), a positioning plate (3), a protective sleeve with edges (4), a round nut (5), a transition sleeve (6), a long bolt (8), a washer (9), a hexagonal nut (10) and a hexagonal bolt (11);

[0008] The top of the hook cover assembly (1) is provided with a hook, and the bottom is provided with an upper cover, which is fixed to the bottom of the hook by a hexagonal bolt (11); a through hole is provided in the middle of the upper cover for assisting the lead anode (12) to pass through; and two through holes are provided at the edge of the upper cover;

[0009] A positioning plate (3) is arranged below the upper cover plate, and a through hole is arranged in the middle of the positioning plate (3) for locating the position of the parts; two through holes are arranged at the edge of the positioning plate (3);

[0010] The lower cover plate assembly (2) is located at the bottom of the stacking device, and is provided with a through hole in the middle for assisting the lead anode (12) to pass through; two through holes are provided at the edge of the lower cover plate assembly (2);

[0011] Long bolts (8) pass through the through holes of the hook cover assembly (1), the lower cover assembly (2) and the edge of the positioning plate (3), and are fixed with washers (9) and hexagonal nuts (10) to integrate the stacking device;

[0012] The top of the first layer of parts is pressed against the bottom of the upper cover plate and the positioning plate, and at the same time, the top outer ring of the first layer of parts presses against the inner circle of the through hole in the middle of the positioning plate (3); a stepped through hole is arranged in the middle of the first layer of parts, the first layer of edged sleeve (4) is placed in the stepped through hole, and the lower end of the first layer of edged sleeve (4) is exposed below the first layer of parts, and the outer periphery of the lower end of the first layer of edged sleeve (4) is provided with an external thread, which is threadedly connected with the first layer of round nut (5); a first layer of transition sleeve (6) is arranged below the first layer of edged sleeve (4) and the first layer of round nut (5); a boss is arranged at the bottom edge of the first layer of transition sleeve (6);

[0013] The top of the second layer part is pressed against the bottom of the first layer transition sleeve (6), and at the same time, the top outer ring of the second layer part presses against the boss at the bottom of the first layer transition sleeve (6); a stepped through hole is arranged in the middle of the second layer part, the second layer edged sleeve (4) is placed in the stepped through hole, and the lower end of the second layer edged sleeve (4) is exposed below the second layer part, and the outer periphery of the lower end of the second layer edged sleeve (4) is provided with an external thread, which is threadedly connected with the second layer round nut (5); a second layer transition sleeve (6) is arranged below the second layer edged sleeve (4) and the second layer round nut (5);

[0014] And so on;

[0015] The top of the last layer of parts is pressed against the bottom of the previous layer of transition sleeve (6), and at the same time, the top outer ring of the last layer of parts presses against the boss at the bottom of the previous layer of transition sleeve (6); a stepped through hole is arranged in the middle of the last layer of parts, and the last layer of edged sleeve (4) is placed in the stepped through hole, and the lower end of the last layer of edged sleeve (4) is exposed below the last layer of parts, and the outer periphery of the lower end of the last layer of edged sleeve (4) is provided with an external thread, which is threadedly connected with the last layer of round nut (5); a lower cover plate assembly (2) is arranged below the second layer of edged sleeve (4) and the second layer of round nut (5).

[0016] (III) Beneficial effects

[0017] The utility model proposes an air-conducting stacking hanging device for local chrome plating of special-shaped parts. The utility model designs a new type of stacking hanging device which adds a transition sleeve with air-conducting holes between parts and adopts an edge protective sleeve made of organic glass to protect the non-chrome-plated surface, so as to solve the influence of bubbles generated during electroplating in the tank on the parts, avoid the phenomenon of mottling and chrome running, and realize the local chrome plating of the stepped columnar annular winding oil shield.

[0018] The utility model can fundamentally eliminate the influence of bubbles generated during electroplating in the tank on parts, avoid the phenomenon of mottling and chromium running, ensure the coating quality of parts after plating, and realize qualified batch production operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of chrome plating of a φ135H8 annular groove on the inner wall of the oil retaining cover of the utility model;

[0020] Figure 2 Structural diagram of gas-guided stacked chrome plating device;

[0021] Figure 3 Transition set structure;

[0022] Figure 4 With edge sheath and round nut structure;

[0023] In the figure, 1, hook cover assembly 2, lower cover assembly 3, positioning plate 4, edge sheath 5, round nut 6, transition sleeve 7, insulating outer cylinder 8, long bolt 9, washer 10, nut 11, bolt 12, auxiliary lead anode. DETAILED DESCRIPTION

[0024] In order to make the purpose, content and advantages of the utility model clearer, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments.

[0025] The utility model aims to design an air-conducting stacking device for local chrome plating of special-shaped parts, so as to eliminate the influence of bubbles generated during electroplating on the chrome plating of the inner surface of cylindrical annular parts with steps, and ensure the coating quality after local chrome plating of parts.

[0026] The utility model designs a gas-conducting stacking device for partial chrome plating of special-shaped parts, such as Figure 2 As shown, it includes: a hook cover assembly (1), a lower cover assembly (2), a positioning plate (3), an edge sheath (4), a round nut (5), a transition sleeve (6), an insulating outer tube (7), a long bolt (8), a washer (9), a hexagonal nut (10) and a hexagonal bolt (11).

[0027] The top of the hook cover assembly (1) is provided with a hook, and the bottom is provided with an upper cover, which is fixed to the bottom of the hook by a hexagonal bolt (11); a through hole is provided in the middle of the upper cover for assisting the lead anode (12) to pass through; and two through holes are provided at the edge of the upper cover;

[0028] A positioning plate (3) is arranged below the upper cover plate, and a through hole is arranged in the middle of the positioning plate (3) for locating the position of the parts; two through holes are arranged at the edge of the positioning plate (3);

[0029] The lower cover plate assembly (2) is located at the bottom of the stacking device, and is provided with a through hole in the middle for assisting the lead anode (12) to pass through; two through holes are provided at the edge of the lower cover plate assembly (2);

[0030] Long bolts (8) pass through the through holes of the hook cover assembly (1), the lower cover assembly (2) and the edge of the positioning plate (3), and are fixed with washers (9) and hexagonal nuts (10) to integrate the stacking device;

[0031] The top of the first layer of parts is pressed against the bottom of the upper cover plate and the positioning plate, and at the same time, the top outer ring of the first layer of parts presses against the inner circle of the through hole in the middle of the positioning plate (3); a stepped through hole is arranged in the middle of the first layer of parts, the first layer of edged sleeve (4) is placed in the stepped through hole, and the lower end of the first layer of edged sleeve (4) is exposed below the first layer of parts, and the outer periphery of the lower end of the first layer of edged sleeve (4) is provided with an external thread, which is threadedly connected with the first layer of round nut (5); a first layer of transition sleeve (6) is arranged below the first layer of edged sleeve (4) and the first layer of round nut (5); a boss is arranged at the bottom edge of the first layer of transition sleeve (6);

[0032] The top of the second layer part is pressed against the bottom of the first layer transition sleeve (6), and at the same time, the top outer ring of the second layer part presses against the boss at the bottom of the first layer transition sleeve (6); a stepped through hole is arranged in the middle of the second layer part, the second layer edged sleeve (4) is placed in the stepped through hole, and the lower end of the second layer edged sleeve (4) is exposed below the second layer part, and the outer periphery of the lower end of the second layer edged sleeve (4) is provided with an external thread, which is threadedly connected with the second layer round nut (5); a second layer transition sleeve (6) is arranged below the second layer edged sleeve (4) and the second layer round nut (5);

[0033] And so on;

[0034] The top of the last layer of parts is pressed against the bottom of the previous layer of transition sleeve (6), and at the same time, the top outer ring of the last layer of parts presses against the boss at the bottom of the previous layer of transition sleeve (6); a stepped through hole is arranged in the middle of the last layer of parts, and the last layer of edged sleeve (4) is placed in the stepped through hole, and the lower end of the last layer of edged sleeve (4) is exposed below the last layer of parts, and the outer periphery of the lower end of the last layer of edged sleeve (4) is provided with an external thread, which is threadedly connected with the last layer of round nut (5); a lower cover plate assembly (2) is arranged below the second layer of edged sleeve (4) and the second layer of round nut (5).

[0035] Through holes are provided between the first layer of the edged sheath (4) and the last layer of the edged sheath (4), and between the first layer of the transition sheath (6) and the last layer of the transition sheath (6) to assist the lead anode (12) to pass through.

[0036] Furthermore, exhaust holes are evenly distributed around the transition sleeve (6) to guide air bubbles out of the component.

[0037] Furthermore, the edged sheath (4) is a three-step cylindrical structure, with a through hole in the middle, and cylinders of a first diameter, a second diameter, and a third diameter from top to bottom, wherein the first diameter is greater than the second diameter and the third diameter is greater than the third diameter, and external threads are arranged around the bottom cylinder.

[0038] Furthermore, after installation, the bottom surface of the first diameter cylinder with the edge shield (4) is in close contact with the parts to prevent chrome from running away.

[0039] Furthermore, after installation, the top surface of the round nut (5) is in close contact with the parts to prevent chrome from running away.

[0040] Furthermore, knurling or roughening is provided on the periphery of the round nut (5) to facilitate screwing.

[0041] Furthermore, after installation, the top surface of the transition sleeve (6) is in close contact with the parts to prevent chrome from running away.

[0042] Furthermore, an insulating outer cylinder (7) is arranged outside the entire stacking device.

[0043] During chrome plating, firstly, a protective sleeve with an edge (4) and a round nut (5) made of organic glass are installed in the central hole of the part to protect the non-chrome-plated part of the inner hole and avoid the problem of chrome leakage. All the parts with the protective sleeve with an edge (4) installed are stacked and hung in the stacking device in turn. A transition sleeve (6) with air guide holes is added between the parts to guide the bubbles out of the parts to avoid the mottling and local chrome deficiency caused by air traps and improve the quality of the plating. Finally, the hook cover assembly (1) and the lower cover assembly (2) are connected by long bolts (8), washers (9), hexagonal nuts (10) and hexagonal bolts (11). An auxiliary lead anode (12) is hung in the middle and placed in the electroplating tank for chrome plating.

[0044] The utility model designs a new type of stacking hanger which adds a transition sleeve with air guide holes between parts and adopts an edge cover made of organic glass to protect the non-chrome-plated surface, so as to solve the influence of bubbles generated during electroplating in the tank on the parts, avoid the phenomenon of mottling and chrome running, and realize the local chrome plating of the stepped columnar annular winding oil shield.

[0045] The utility model can fundamentally eliminate the influence of bubbles generated during electroplating in the tank on parts, avoid the phenomenon of mottling and chromium running, ensure the coating quality of parts after plating, and realize qualified batch production operation.

[0046] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A gas-guided stacking device for partial chrome plating of special-shaped parts, characterized in that: The stacking device comprises: a hook cover assembly (1), a lower cover assembly (2), a positioning plate (3), an edge protection sleeve (4), a round nut (5), a transition sleeve (6), a long bolt (8), a washer (9), a hexagonal nut (10) and a hexagonal bolt (11); The top of the hook cover assembly (1) is provided with a hook, and the bottom is provided with an upper cover, which is fixed to the bottom of the hook by a hexagonal bolt (11); a through hole is provided in the middle of the upper cover for assisting the lead anode (12) to pass through; and two through holes are provided at the edge of the upper cover; A positioning plate (3) is arranged below the upper cover plate, and a through hole is arranged in the middle of the positioning plate (3) for locating the position of the parts; two through holes are arranged at the edge of the positioning plate (3); The lower cover plate assembly (2) is located at the bottom of the stacking device, and is provided with a through hole in the middle for assisting the lead anode (12) to pass through; two through holes are provided at the edge of the lower cover plate assembly (2); Long bolts (8) pass through the through holes of the hook cover assembly (1), the lower cover assembly (2) and the edge of the positioning plate (3), and are fixed with washers (9) and hexagonal nuts (10) to integrate the stacking device; The top of the first layer of parts is pressed against the bottom of the upper cover plate and the positioning plate, and at the same time, the top outer ring of the first layer of parts presses against the inner circle of the through hole in the middle of the positioning plate (3); a stepped through hole is arranged in the middle of the first layer of parts, the first layer of edged sleeve (4) is placed in the stepped through hole, and the lower end of the first layer of edged sleeve (4) is exposed below the first layer of parts, and the outer periphery of the lower end of the first layer of edged sleeve (4) is provided with an external thread, which is threadedly connected with the first layer of round nut (5); a first layer of transition sleeve (6) is arranged below the first layer of edged sleeve (4) and the first layer of round nut (5); a boss is arranged at the bottom edge of the first layer of transition sleeve (6); The top of the second layer part is pressed against the bottom of the first layer transition sleeve (6), and at the same time, the top outer ring of the second layer part presses against the boss at the bottom of the first layer transition sleeve (6); a stepped through hole is arranged in the middle of the second layer part, the second layer edged sleeve (4) is placed in the stepped through hole, and the lower end of the second layer edged sleeve (4) is exposed below the second layer part, and the outer periphery of the lower end of the second layer edged sleeve (4) is provided with an external thread, which is threadedly connected with the second layer round nut (5); a second layer transition sleeve (6) is arranged below the second layer edged sleeve (4) and the second layer round nut (5); And so on; The top of the last layer of parts is pressed against the bottom of the previous layer of transition sleeve (6), and at the same time, the top outer ring of the last layer of parts presses against the boss at the bottom of the previous layer of transition sleeve (6); a stepped through hole is arranged in the middle of the last layer of parts, and the last layer of edged sleeve (4) is placed in the stepped through hole, and the lower end of the last layer of edged sleeve (4) is exposed below the last layer of parts, and the outer periphery of the lower end of the last layer of edged sleeve (4) is provided with an external thread, which is threadedly connected with the last layer of round nut (5); a lower cover plate assembly (2) is arranged below the second layer of edged sleeve (4) and the second layer of round nut (5).

2. The gas-conducting stacking device for partial chrome plating of special-shaped parts according to claim 1, characterized in that: Through holes are provided between the first layer of the edged sheath (4) and the last layer of the edged sheath (4), and between the first layer of the transition sheath (6) and the last layer of the transition sheath (6) to assist the lead anode (12) to pass through.

3. The gas-conducting stacking device for partial chrome plating of special-shaped parts according to claim 1, characterized in that: Exhaust holes are evenly distributed around the transition sleeve (6) to guide air bubbles out of the component.

4. The gas-conducting stacking device for partial chrome plating of special-shaped parts according to claim 1, characterized in that: The edged sheath (4) is a three-step cylindrical structure, with a through hole in the middle, and cylinders of a first diameter, a second diameter, and a third diameter from top to bottom, wherein the first diameter is greater than the second diameter and the third diameter is greater than the third diameter, and external threads are arranged around the bottom cylinder.

5. The gas-conducting stacking device for partial chrome plating of special-shaped parts as claimed in claim 4, characterized in that: After installation, the bottom surface of the first diameter cylinder with the edge shield (4) is in close contact with the parts to prevent chrome from running away.

6. The gas-conducting stacking device for partial chrome plating of special-shaped parts as claimed in claim 4, characterized in that: After installation, the top surface of the round nut (5) is in close contact with the parts to prevent chrome from running away.

7. The gas-conducting stacking device for partial chrome plating of special-shaped parts according to claim 4, characterized in that: The outer periphery of the round nut (5) is provided with knurling or roughening to facilitate screwing.

8. The gas-conducting stacking device for partial chrome plating of special-shaped parts according to claim 4, characterized in that: After installation, the top surface of the transition sleeve (6) is in close contact with the parts to prevent chrome from running away.

9. The gas-conducting stacking device for partial chrome plating of special-shaped parts according to claim 1, characterized in that: The stacking device further comprises: an insulating outer cylinder (7), which is arranged outside the entire stacking device.

10. The gas-conducting stacking device for partial chrome plating of special-shaped parts according to claim 1, characterized in that: The edge protection sleeve (4) and the round nut (5) are made of organic glass.

Images