A protective device for partial chrome plating of boss structure parts

Abstract

This utility model discloses a partial chrome plating protection device for boss-shaped structural parts. It includes a hook, a fixing plate, a cover plate, and a sleeve. The sleeve is a groove with a waist-shaped hole on its bottom plate. Two threaded holes are located on the bottom plate on both sides of the waist-shaped hole. The part is placed in the sleeve, with the boss portion of the part passing through the waist-shaped hole. The cover plate is a rectangular plate, with its bottom surface flush against the upper surface of the part and located within the sleeve. The cover plate has three circular holes a. The fixing plate is placed on top of the cover plate and has several sets of circular holes b, with each set of three holes b corresponding to one sleeve and one cover plate. Each set of holes b is fitted with three bolts, which pass sequentially through the corresponding circular hole b, circular hole a, and through hole on the part, and are connected to the threaded holes. The end of the hook is fixedly connected to one end of the fixing plate. This utility model solves the problem of inadequate protection of the non-chrome-plated surface of boss-shaped structural parts, resulting in a chrome layer that affects the dimensional and appearance quality of the finished product after chrome plating.

Description

Technical Field

[0001] This utility model relates to a protective device for partial chrome plating of boss structure parts, belonging to the field of electroplating technology. Background Technology

[0002] Chromium is a slightly bluish-white metal that is very stable in the atmosphere and can maintain its luster for a long time. It is also very stable in solutions of alkalis, nitric acid, sulfides, carbonates, and organic acids. Chromium plating is a process in the surface treatment of steel parts where chromium is plated onto other metals.

[0003] Chromium plating exhibits excellent chemical stability, remaining unaffected by alkalis, sulfides, nitric acid, and most organic acids. Due to its superior properties, chromium plating is widely used as the outermost and functional coating in protective-decorative chromium plating systems, holding a vital position in the electroplating industry. With advancements in science and technology and increasing emphasis on environmental protection, new processes have been developed based on traditional chromium plating, including microcracked chromium plating, microporous chromium plating, black chromium plating, loose-pore chromium plating, low-concentration chromium plating, high-efficiency hard chromium plating, and trivalent chromium plating, further expanding the application range of chromium plating.

[0004] Protective and decorative chrome plating prevents corrosion of the base metal and provides a bright, decorative appearance. Hard chrome plating improves wear resistance, extends service life, and can also be used to repair worn parts. Milky white chrome plating has very few pores and excellent corrosion resistance. Therefore, chrome plating possesses high hardness, good wear resistance, strong reflectivity, and good heat resistance. Due to its many advantages, chrome plating is widely used in artillery parts. However, because chrome plating is a process that uses the electrochemical reaction of chromium ions to deposit a charged layer on the substrate surface, forming a dense chrome layer, if the substrate surface is not protected, a chrome layer will deposit on it, causing changes in product dimensions and affecting assembly. Therefore, when artillery parts require localized chrome plating, a dedicated protective process device needs to be designed to isolate the chrome plating solution from the part. The protective properties of the tooling determine the quality of the locally chrome-plated parts. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, this utility model provides a local chrome plating protection device for boss structure parts. This device solves the problem that the non-chrome-plated surface of boss structure parts is not properly protected, resulting in a chrome layer that affects the size and appearance of the product after chrome plating, thus ensuring the quality of the chrome plating process of the product parts.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a partial chrome plating protection device for boss structure parts, including a hook, a fixing plate, a cover plate and a protective sleeve. The protective sleeve is a rectangular groove. A waist-shaped hole is provided in the middle of the bottom plate of the protective sleeve. The arrangement direction of the waist-shaped hole is consistent with the length direction of the protective sleeve. On both sides of the waist-shaped hole, two threaded holes are provided on the bottom plate of the protective sleeve. The threaded holes and the waist-shaped hole are on the same center line. The parts are placed in the protective sleeve, and the boss part on the parts passes through the waist-shaped hole.

[0007] The cover plate is a rectangular plate. The bottom of the cover plate is attached to and fits the upper surface of the part in the sleeve. The cover plate has three evenly spaced circular holes a, all of which are located on the same center line. The fixing plate is placed on top of the cover plate. The fixing plate has several sets of circular holes b on the same center line. Every three circular holes b form a group, and a group of circular holes b corresponds to a sleeve and a cover plate.

[0008] A set of round holes b are connected to three bolts. In each set, the bolts on both sides pass through their respective round holes b, round holes a, and corresponding through holes on the part in sequence, and are threadedly connected to their respective threaded holes. The bolt in the middle of each set passes through its respective round holes b and round holes a in sequence, and is threadedly connected to the part. The end of the hook is fixedly connected to one end of the fixing plate.

[0009] Furthermore, the hook includes a large hook and a small hook. The opening of the large hook faces downward, and the small hook is fixed to one side of the large hook rod, with the opening of the small hook facing the end of the large hook.

[0010] Furthermore, the center points of the circular hole b, circular hole a, through hole and threaded hole on the part in the same vertical direction are all on the same straight line.

[0011] The beneficial effects of this utility model are as follows: This utility model can effectively ensure a tight fit between the product parts and the tooling fixtures, preventing local misalignment of the product parts and deviation between the tooling and the product parts during the chrome plating process, which would cause partial chrome layer obstruction on the chrome-plated surface and inadequate protection of the non-chrome-plated surface, resulting in a chrome layer that affects the dimensional and appearance quality of the product after chrome plating; the device is simple to operate, reducing the labor intensity of workers; one set of hook lifting structure can simultaneously weld multiple sets of boss protection structures, and multiple parts can be produced at the same time, improving production efficiency; it has strong versatility, and the bolt fastening clamping structure and hook lifting structure can be widely used in parts with boss structures of different sizes that are partially chrome-plated; this protective process device effectively solves the problem that the surface dimensions of the non-chrome-plated surface of boss structure parts do not meet the assembly requirements due to only partial chrome plating, affecting product quality. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a top view of the fixing plate of this utility model.

[0015] Figure 3 This is a top view of the cover plate of this utility model.

[0016] Figure 4 This is a top view of the sheath of this utility model.

[0017] Figure 5 This is the front view of the part.

[0018] Figure 6 yes Figure 5 Top view.

[0019] Figure 7 This is a schematic diagram of the present invention when multiple parts are clamped.

[0020] Numbering on the map: 1. Hook, 101. Large hook, 102. Small hook, 2. Fixing plate, 201. Round hole b, 3. Cover plate, 301. Round hole a, 4. Sheath, 401. Waist-shaped hole, 402. Threaded hole, 5. Bolt, 6. Parts. Detailed Implementation

[0021] like Figure 1 As shown in Figure 7, a partial chrome plating protective device for a boss structure part includes a hook 1, a fixing plate 2, a cover plate 3, and a protective sleeve 4. The protective sleeve 4 is a rectangular groove. A waist-shaped hole 401 is provided at the middle position of the bottom plate of the protective sleeve 4. The arrangement direction of the waist-shaped hole 401 is consistent with the length direction of the protective sleeve 4. On both sides of the waist-shaped hole 401, two threaded holes 402 are provided on the bottom plate of the protective sleeve 4. The threaded holes 402 and the waist-shaped hole 401 are on the same center line. The part 6 is placed in the protective sleeve 4, and the boss part on the part 6 passes through the waist-shaped hole 401.

[0022] The cover plate 3 is a rectangular plate. The bottom of the cover plate 3 is attached to and fits the upper surface of the part 6 in the sleeve 4. The cover plate 3 has three evenly spaced circular holes a301, all of which are located on the same center line. The fixing plate 2 is placed on top of the cover plate 3. The fixing plate 2 has several sets of circular holes b201 on the same center line. Every three circular holes b201 form a group, and a group of circular holes b201 corresponds to a sleeve 4 and a cover plate 3.

[0023] A set of round holes b201 are fitted with three bolts 5. In each set, the bolts 5 on both sides are fitted through their respective round holes b201, round holes a301 and corresponding through holes on the part 6, and are threadedly connected to their respective threaded holes 402. The bolts 5 in the middle of each set are fitted through their respective round holes b201 and round holes a301, and are threadedly connected to the part 6.

[0024] The end of the hook 1 is fixedly connected to one end of the fixing plate 2. The hook 1 includes a large hook 101 and a small hook 102. The opening of the large hook 101 is arranged downwards, and the small hook 102 is fixed to one side of the rod of the large hook 101. The opening of the small hook 102 faces the end of the large hook 101.

[0025] The center points of the circular holes b201 and a301, the through hole and the threaded hole 402 on part 6, which are in the same vertical direction, are all on the same straight line.

[0026] During use, in response to the requirement of local chrome plating for boss structure parts, it is necessary to protect the non-chrome-plated surface to prevent chrome layer deposition. The boss part of part 6 is fitted with the waist-shaped hole 401 passing through the sleeve 4 to protect the two sides of the non-chrome-plated surface and the bottom connected to the chrome-plated surface. The cover plate 3 is tightly fitted to the upper surface of the non-chrome-plated surface, and the bottom of the cover plate 3 and part 6 are placed together in the groove of the sleeve 4 to provide tight protection for the non-chrome-plated surface, forming a boss protection structure.

[0027] After the boss protective structure completely protects the non-chrome-plated surface of part 6, bolts 5 are used to pass through the fixing plate 2, cover plate 3, and sleeve 4 in sequence, and are connected to the threaded hole 402 of sleeve 4 to form a bolt fastening and clamping structure.

[0028] The hook 1 is welded to one end of the fixed plate 2 to form a hook lifting structure. The hook 1 is designed with two hooks of different sizes. The small hook 102 is to facilitate the operator to use the crane to lift the parts 6 and tooling to the slot. The large hook 101 is connected to the cathode rod to conduct electricity.

[0029] The fixing plate 2 has several sets of round holes b201 on the same center line. Every three round holes b201 form a group, and a group of round holes b201 corresponds to a sleeve 4 and a cover plate 3. In this way, the local chrome plating protection device for boss structure parts can more effectively improve work efficiency.

[0030] By designing a local chrome plating protection device for boss structure parts, the problem of inadequate protection of non-chrome-plated surfaces of boss structure parts, resulting in chrome layer formation, which affects the dimensional and appearance quality of the product after chrome plating is solved. This ensures the quality of the chrome plating process of the product parts, is easy to operate, reduces labor intensity, and meets the design requirements of the parts.

Claims

1. A protective device for local chromium plating of a boss structure part, characterized in that: The device includes a hook (1), a fixing plate (2), a cover plate (3), and a protective sleeve (4). The protective sleeve (4) is a rectangular groove. A waist-shaped hole (401) is provided in the middle of the bottom plate of the protective sleeve (4). The arrangement direction of the waist-shaped hole (401) is consistent with the length direction of the protective sleeve (4). On both sides of the waist-shaped hole (401), two threaded holes (402) are provided on the bottom plate of the protective sleeve (4). The threaded holes (402) and the waist-shaped hole (401) are on the same center line. The part (6) is placed in the protective sleeve (4). The boss part on the part (6) passes through the waist-shaped hole (401). The cover plate (3) is a rectangular plate. The bottom of the cover plate (3) is attached to and fits the upper surface of the part (6) in the sleeve (4). The cover plate (3) has three evenly spaced circular holes a (301), which are all located on the same center line. The fixing plate (2) is placed on top of the cover plate (3). The fixing plate (2) has several sets of circular holes b (201) on the same center line. Every three circular holes b (201) form a group. A group of circular holes b (201) corresponds to a sleeve (4) and a cover plate (3). (201) There are three bolts (5) for the connection. The bolts (5) on both sides of each group pass through their respective round holes b (201), round holes a (301) and corresponding through holes on the part (6) in sequence, and are threadedly connected to their respective threaded holes (402) by the bolts (5); the bolts (5) in the middle position of each group pass through their respective round holes b (201) and round holes a (301) in sequence, and are threadedly connected to the part (6) by the bolts (5); the end of the hook (1) is fixedly connected to one end of the fixing plate (2).

2. A device for protecting a boss structure part from local chrome plating according to claim 1, characterized in that: The hook (1) includes a large hook (101) and a small hook (102). The opening of the large hook (101) is arranged downwards, and the small hook (102) is fixed to one side of the rod of the large hook (101). The opening of the small hook (102) faces the end of the large hook (101).

3. A device for protecting a boss structure part from local chrome plating according to claim 1, characterized in that: The center points of the circular holes b (201), a (301), the through holes and the threaded holes (402) on the part (6) are all on the same straight line in the same vertical direction.

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