Heat treatment tooling and heat treatment method for large diameter shaft sleeve

Abstract

The invention discloses a heat treatment tool and a heat treatment method for a large diameter shaft sleeve, and the heat treatment tool for a large diameter shaft sleeve comprises an anode conductive ring, an anode conductive rod connected to the anode conductive ring, an insulating shielding ring connected to the anode conductive ring, and a receiving cavity arranged on the insulating shielding ring. The invention solves the problem of uneven ends of existing large diameter shaft sleeves (diameter 390-420mm) during galvanizing, so that after galvanizing, the shape of the entire shaft sleeve remains consistent, smooth and uniform, and the qualified rate and efficiency of the product are guaranteed.

Description

Technical Field

[0001] The invention relates to the field of heat treatment technology, and in particular to a heat treatment tool and a heat treatment method for a large-diameter shaft sleeve. Background Art

[0002] Many parts, such as shafts and sleeves, need to avoid corrosion during use during the processing process. At this time, their surface needs to be treated, such as galvanizing. For galvanized sleeves, it is necessary to ensure that the sleeve surface is smooth after galvanizing. Once the surface is not smooth, it is not that the galvanizing of the part is unqualified and needs to be treated again. When galvanizing large-diameter sleeves (diameter 390-420mm), the end of the sleeve will be uneven. Therefore, it is necessary to solve the uneven galvanizing of the end of the large-diameter sleeve (diameter 390-420mm) when galvanizing. Summary of the invention

[0003] The purpose of the present invention is to provide a heat treatment tool and a heat treatment method for a large diameter shaft sleeve, which solves the problem of uneven ends (rounded corners) of existing large diameter shaft sleeves (diameter 390-420mm) during galvanizing, and ensures the qualified rate and efficiency of the product.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A heat treatment tool for a large diameter shaft sleeve comprises an anode conductive ring, an anode conductive rod connected to the anode conductive ring, an insulating shielding ring connected to the anode conductive ring, and a containing cavity arranged on the insulating shielding ring.

[0006] As a further preferred technical solution of the present invention, the accommodating cavity is a conical cavity whose diameter gradually decreases from top to bottom.

[0007] As a further preferred technical solution of the present invention, an insulating positioning ring is provided on the insulating shielding ring, a conductive rod insertion hole is provided on the insulating positioning ring, and the insulating ring is connected to the insulating shielding ring through an insulating rib plate.

[0008] As a further preferred technical solution of the present invention, the insulating positioning ring is located above the insulating shielding ring, and the outer diameter of the insulating positioning ring is smaller than the outer diameter of the insulating shielding ring.

[0009] As a further preferred technical solution of the present invention, the insulating ring, the insulating shielding ring and the insulating rib are made of plastic.

[0010] As a further preferred technical solution of the present invention, the height of the accommodating cavity is H2, the fillet or chamfer size of the sleeve is R, the height of the insulating shielding ring is H1, and the coefficient is X, then H2=XR, H1=XH2, then X=(1.5-2).

[0011] A heat treatment method for a large diameter shaft sleeve, characterized by comprising the following steps:

[0012] Step a) placing the sleeve; placing the sleeve to be heat treated into the plating solution;

[0013] Step b) placing the heat treatment tooling; placing the heat treatment tooling into the galvanizing solution and covering the shaft sleeve;

[0014] Step c) an adjustment step: adjusting the position of the sleeve so that the center line of the sleeve coincides with the center line of the accommodating cavity, and a predetermined gap is maintained between the fillet or chamfer of the sleeve and the accommodating cavity;

[0015] Step d) a power-on step: inserting a conductive rod from the conductive rod insertion hole and contacting the conductive rod with the top of the sleeve, and then powering on for heat treatment.

[0016] Compared with the prior art, the invention has the following beneficial effects: it solves the problem of uneven ends of existing large-diameter shaft sleeves (diameter 390-420 mm) during galvanizing, so that after galvanizing, the shape of the entire shaft sleeve remains consistent and smooth, thereby ensuring the qualified rate and efficiency of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a step diagram of the present invention. DETAILED DESCRIPTION

[0019] See also Figures 1-2 In the embodiment of the present invention, the heat treatment tool for a large diameter shaft sleeve includes an anode conductive ring 1, an anode conductive rod 2 connected to the anode conductive ring 1, an insulating shielding ring 3 connected to the anode conductive ring 1, and a receiving cavity 4 provided on the insulating shielding ring 3. The number of the anode conductive rods is determined according to actual conditions, and the anode conductive rods are connected to the anode conductive ring 1, and both are made of conductive materials, while the insulating shielding ring 3 is made of non-conductive materials to prevent the passage of current.

[0020] After research, the applicant found that the uneven galvanizing of the existing sleeves occurred at the rounded corners of the sleeves, where a large amount of zinc accumulated, resulting in an uneven surface and problems with the galvanized layer. As for how to solve this problem, the applicant conducted a large number of experiments and studies, and later found that during galvanizing, due to its structural characteristics, after the current passed, it caused the accumulation of zinc liquid, and then formed an excessively thick zinc layer, causing the surface to be uneven. For this reason, the applicant developed the technical solution of the present application, added an insulating shielding ring, and set a accommodating cavity 4 on the insulating shielding ring 3, and used the accommodating cavity to isolate the rounded corners of the sleeve as much as possible, thereby avoiding the accumulation of zinc liquid, avoiding the problem of excessively thick zinc layer, and ensuring the smoothness and uniformity of the entire galvanized surface.

[0021] Furthermore, in order to correspond to the shape of the rounded corner, the accommodating cavity 4 is a tapered cavity with a diameter gradually decreasing from top to bottom. Of course, in order to achieve better results, the cross-section of the accommodating cavity 4 can be an arc shape corresponding to the shape of the rounded corner.

[0022] Furthermore, in order to achieve a better galvanizing effect, an insulating positioning ring 5 is provided on the insulating shielding ring 3, and a conductive rod insertion hole 6 is provided on the insulating positioning ring 5. The insulating ring 5 is connected to the insulating shielding ring 3 through an insulating rib plate 7, and the conductive rod insertion hole and the external conductive rod clearance are matched.

[0023] Furthermore, the insulating positioning ring 5 is located above the insulating shielding ring 3 , and the outer diameter of the insulating positioning ring 5 is smaller than the outer diameter of the insulating shielding ring 3 .

[0024] Furthermore, the insulating ring 5, the insulating shielding ring 3 and the insulating rib plate 7 are made of plastic. Of course, they can also be made of other well-known insulating materials.

[0025] Furthermore, in order to achieve a better galvanizing effect, the height of the accommodating cavity 4 is H2, the fillet or chamfer size of the sleeve is R, the height of the insulating shielding ring 3 is H1, the coefficient X, then H2=XR, H1=XH2, then X=(1.5-2), in this way, the coefficient X is the same, so the multiples are the same, which can achieve a better galvanizing effect and ensure that the thickness of the coating is consistent and the surface is smooth.

[0026] A heat treatment method for a large diameter shaft sleeve comprises the following steps:

[0027] Step a: placing the shaft sleeve; placing the shaft sleeve to be heat treated into the plating solution;

[0028] Step b: placing the heat treatment tooling; placing the heat treatment tooling into the galvanizing solution and covering the shaft sleeve;

[0029] Step c: adjusting the position of the sleeve so that the center line of the sleeve coincides with the center line of the accommodating cavity, and a predetermined gap is maintained between the fillet or chamfer of the sleeve and the accommodating cavity;

[0030] Step d: power-on step: insert the conductive rod from the conductive rod insertion hole and contact it with the top of the sleeve, and then power on for heat treatment.

[0031] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Heat treatment tooling for large diameter shafts and sleeves, characterized by: The invention comprises an anode conductive ring (1), an anode conductive rod (2) connected to the anode conductive ring (1), an insulating shielding ring (3) connected to the anode conductive ring (1), and a receiving cavity (4) provided on the insulating shielding ring (3); the receiving cavity (4) is a conical cavity whose diameter gradually decreases from top to bottom; an insulating positioning ring (5) is provided on the insulating shielding ring (3), a conductive rod insertion hole (6) is provided on the insulating positioning ring (5), and the insulating ring (5) is connected to the insulating shielding ring (3) via an insulating rib plate (7); the insulating positioning ring (5) is located above the insulating shielding ring (3), and the outer diameter of the insulating positioning ring (5) is smaller than the outer diameter of the insulating shielding ring (3); the insulating ring (5), the insulating shielding ring (3) and the insulating rib plate (7) are made of plastic; the height of the receiving cavity (4) is H2, the fillet size of the shaft and the sleeve is R, the height of the insulating shielding ring (3) is H1, and the coefficient X, then H2=XR, H1=XH2, then X=(1.5-2).

2. A heat treatment method for a heat treatment tool for a large diameter shaft or sleeve according to claim 1, characterized in that The following steps are involved: Step a) placing the shaft and sleeve; placing the shaft and sleeve to be heat treated into the plating solution; Step b) placing the heat treatment tooling; placing the heat treatment tooling into the galvanizing solution and covering the shaft and sleeve; Step c) an adjustment step: adjusting the positions of the shaft and the sleeve so that the center lines of the shaft and the sleeve coincide with the center line of the accommodating cavity, and a predetermined gap is maintained between the fillets of the shaft and the sleeve and the accommodating cavity; Step d) a power-on step: inserting a conductive rod from the conductive rod insertion hole and contacting the top of the shaft and the sleeve, and then powering on for heat treatment.

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