Tool for ion nitriding treatment of inner hole of sleeve part

Abstract

The utility model discloses a tool for sleeve part inner hole ion nitriding treatment, which comprises a seat sleeve, a cavity penetrating through the upper end face and the lower end face is arranged in the seat sleeve, and a plurality of air holes are arranged on the seat sleeve at intervals. When the tool is used, a plurality of seat sleeves of the tool are laid on a cathode disc at intervals, sleeve part blanks to be subjected to ion nitriding treatment are placed at the upper ends of the seat sleeves in a one-to-one correspondence mode, then ion nitriding treatment is carried out on the inner hole wall faces of the sleeve part blanks, and due to the fact that a plurality of air holes are formed in the seat sleeves at intervals, the sleeve part blanks can be subjected to ion nitriding treatment. The nitrogen ion atmosphere generated after the nitrogen-containing gas is ionized can flow up and down in the inner hole cavity of the sleeve part blank, so that the nitrogen ion atmosphere can be uniformly distributed in the inner hole cavity of the sleeve part blank, and the inner hole wall surface of the sleeve part finished product subjected to ion nitriding treatment is ensured to have a uniform nitriding layer; the hardness uniformity of the wall surface of the inner hole of the sleeve part finished product is ensured, and the quality of the sleeve part finished product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat treatment auxiliary equipment for sleeve-type parts, in particular to a tool used for ion nitriding treatment of inner holes of sleeve-type parts. Background Art

[0002] Ion nitriding is a kind of ion chemical heat treatment process that uses the glow discharge phenomenon to ionize nitrogen-containing gas to generate nitrogen ions to bombard the surface of parts, heat them and nitride them, and obtain a surface nitrided layer. It is widely used in cast iron, carbon steel, alloy steel, stainless steel and titanium alloy. After the parts are treated with ion nitriding, the hardness of the material surface can be significantly improved, making them have high wear resistance, fatigue strength, corrosion resistance and burn resistance.

[0003] At present, most of the equipment for ion nitriding treatment of the inner holes of sleeve parts is an ion nitriding furnace, specifically, a number of sleeve parts blanks are placed vertically and spaced on the cathode disk in the furnace of the nitriding furnace, and the finished sleeve parts are removed from the cathode disk after the ion nitriding treatment. Since the sleeve parts blanks are directly placed vertically on the cathode disk, the nitrogen ion atmosphere generated after the nitrogen-containing gas is ionized can only enter the cavity of the sleeve parts blank from the upper port, which causes the nitrogen ion atmosphere to be mostly concentrated at the upper end of the cavity of the sleeve parts blank, that is, the nitrogen ion atmosphere cannot be evenly distributed in the inner hole cavity of the sleeve parts blank, resulting in uneven distribution of the nitrided layer on the inner hole wall of the finished sleeve parts after nitriding treatment, and uneven hardness of the inner hole wall of the finished sleeve parts. To this end, the utility model proposes a tooling for ion nitriding treatment of the inner hole of sleeve parts, in order to solve the above technical problems and improve the nitriding quality of sleeve parts. Summary of the invention

[0004] The purpose of the utility model is to overcome the defects in the prior art and provide a tool for ion nitriding treatment of the inner holes of sleeve-type parts. When in use, a plurality of seat sleeves of the tool of the utility model are laid on the cathode disk at intervals, and the sleeve-type parts blanks to be ion nitrided are placed one by one on the upper end of the seat sleeve, and then the inner hole wall of the sleeve-type parts blank is ion nitrided. Since a plurality of air holes are arranged at intervals on the seat sleeve, the nitrogen ion atmosphere generated after the nitrogen-containing gas is ionized can flow up and down in the inner hole cavity of the sleeve-type parts blank, and then the nitrogen ion atmosphere can be evenly distributed in the inner hole cavity of the sleeve-type parts blank, ensuring that the inner hole wall of the sleeve-type parts finished product after ion nitriding treatment has a uniform nitrided layer, that is, ensuring the hardness uniformity of the inner hole wall of the sleeve-type parts finished product, and improving the quality of the sleeve-type parts finished product.

[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is to design a tool for ion nitriding treatment of the inner holes of sleeve-type parts, including a seat cover, the interior of the seat cover has a cavity that passes through the upper and lower end surfaces, the seat cover is provided with a plurality of air holes at intervals, and the upper edge surface of the seat cover is adapted to the lower end surface of the sleeve-type part blank.

[0006] The utility model discloses a tooling for ion nitriding treatment of inner holes of sleeve-type parts. When in use, a plurality of seat sleeves of the tooling are laid on a cathode disk at intervals, sleeve-type parts blanks to be ion nitrided are placed one by one on the upper end of the seat sleeve, and then the inner hole wall of the sleeve-type parts blank is ion nitrided. Since a plurality of air holes are arranged at intervals on the seat sleeve, the nitrogen ion atmosphere generated after the nitrogen-containing gas is ionized can flow up and down in the inner hole cavity of the sleeve-type parts blank, and then the nitrogen ion atmosphere can be evenly distributed in the inner hole cavity of the sleeve-type parts blank, ensuring that the inner hole wall of the sleeve-type parts finished product after ion nitriding treatment has a uniform nitriding layer, that is, ensuring the hardness uniformity of the inner hole wall of the sleeve-type parts finished product, thereby improving the quality of the sleeve-type parts finished product.

[0007] The preferred technical solution is that the plurality of air holes are longitudinal waist holes distributed at intervals in an annular direction on the seat cover. The air holes with this structural design and distribution have a large total opening area under the premise of ensuring the rigidity of the seat cover, so that the nitrogen ion atmosphere generated after the nitrogen-containing gas is ionized can flow smoothly at the upper and lower ends of the inner hole cavity of the sleeve-type part blank, further ensuring the uniform distribution of the nitrogen ion atmosphere in the inner hole cavity of the sleeve-type part blank.

[0008] A further preferred technical solution is that the inner peripheral side of the upper edge surface of the seat cover is provided with an annular step groove that sinks into the cavity, and the inner diameter φD of the horizontal bottom surface of the annular step groove is less than the outer diameter φA of the sleeve-type part blank and less than the outer diameter φC of the horizontal bottom surface of the annular step groove. The annular step groove improves the convenience of positioning and installing the sleeve-type part blank on the upper end of the seat cover during loading, and the inner and outer diameter dimensions of the horizontal bottom surface of the annular step groove are reasonably designed to ensure that the lower end of the sleeve-type part blank can be smoothly inserted and placed inside the annular step groove at the upper end of the seat cover, which helps to improve the efficiency of loading the sleeve-type part blank.

[0009] A further preferred technical solution is that the value range of φC is: φA+1mm~φA+3mm. The outer diameter φC of the horizontal bottom surface of the annular step groove is reasonably designed to ensure the smoothness of the blank feeding of sleeve parts and the finished sleeve parts, and at the same time ensure the stability of the blank feeding sleeve parts when plugging into the annular step groove at the upper end of the seat cover, so as to avoid the blank sleeve parts or the finished sleeve parts from shaking violently when the seat cover moves.

[0010] A further preferred technical solution is that the lower end of the seat cover is provided with an annular boss extending outward, and the lower end surface of the annular boss is flush with the lower end surface of the seat cover. The annular boss effectively increases the contact area between the lower end surface of the seat cover and the cathode disk, that is, improves the placement stability of the seat cover on the cathode disk, and prevents the blank or finished product of the sleeve part from tipping over due to unstable placement of the seat cover when the sleeve part moves with the seat cover.

[0011] A further preferred technical solution is that the lower end of the seat cover is provided with an annular cone extending outward, the large-diameter end of the annular cone is located at the lower side, and the lower end surface of the annular cone is flush with the lower end surface of the seat cover. The annular cone effectively increases the contact area between the lower end surface of the seat cover and the cathode disk, that is, improves the placement stability of the seat cover on the cathode disk, and prevents the blank or finished product of the sleeve part from tipping over due to the unstable placement of the seat cover when the sleeve part moves with the seat cover.

[0012] The advantages and beneficial effects of the utility model are:

[0013] 1. The utility model discloses a tool for ion nitriding treatment of inner holes of sleeve parts. When in use, several seat sleeves of the utility model tool are laid on the cathode disk at intervals, and the sleeve parts blanks to be ion nitrided are placed one by one on the upper end of the seat sleeve, and then the inner hole wall of the sleeve parts blank is ion nitrided. Since a plurality of air holes are arranged on the seat sleeve at intervals, the nitrogen ion atmosphere generated after the nitrogen-containing gas is ionized can flow up and down in the inner hole cavity of the sleeve parts blank, and then the nitrogen ion atmosphere can be evenly distributed in the inner hole cavity of the sleeve parts blank, ensuring that the inner hole wall of the sleeve parts finished product after ion nitriding treatment has a uniform nitrided layer, that is, ensuring the hardness uniformity of the inner hole wall of the sleeve parts finished product, thereby improving the quality of the sleeve parts finished product.

[0014] 2. Some of the air holes are longitudinal waist holes distributed circumferentially and spaced apart on the seat cover. The air holes with this structural design and distribution have a large total opening area while ensuring the rigidity of the seat cover, so that the nitrogen ion atmosphere generated by the ionization of the nitrogen-containing gas can flow smoothly at the upper and lower ends of the inner hole cavity of the sleeve-type part blank, further ensuring the uniform distribution of the nitrogen ion atmosphere in the inner hole cavity of the sleeve-type part blank.

[0015] 3. The inner circumference of the upper edge of the seat sleeve is provided with an annular step groove that sinks into the cavity, and the inner diameter φD of the horizontal bottom of the annular step groove is less than the outer diameter φA of the sleeve part blank and less than the outer diameter φC of the horizontal bottom of the annular step groove. The annular step groove improves the convenience of positioning and installing the sleeve part blank on the upper end of the seat sleeve during loading, and the inner and outer diameter dimensions of the horizontal bottom of the annular step groove are reasonably designed to ensure that the lower end of the sleeve part blank can be smoothly inserted and placed inside the annular step groove at the upper end of the seat sleeve, which helps to improve the efficiency of loading the sleeve part blank.

[0016] 4. The value range of φC is: φA+1mm~φA+3mm. The outer diameter φC of the horizontal bottom surface of the annular step groove is reasonably designed to ensure the smoothness of the blank feeding and finished product unloading of the sleeve parts, and at the same time ensure the stability of the blank feeding and plugging into the annular step groove at the upper end of the seat cover, so as to avoid the violent shaking of the blank or finished product of the sleeve parts when the seat cover moves.

[0017] 5. The annular boss or annular frustum effectively increases the contact area between the lower end surface of the seat sleeve and the cathode disk, that is, improves the placement stability of the seat sleeve on the cathode disk, and avoids the tipping of the sleeve-type parts blank or the sleeve-type parts finished product due to unstable placement of the seat sleeve when the seat sleeve moves with the seat sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a stereoscopic diagram of a tool used for ion nitriding treatment of the inner holes of sleeve-type parts in Example 1;

[0019] Figure 2 It is a longitudinal cross-section of a tool used for ion nitriding treatment of the inner holes of sleeve-type parts in Example 1;

[0020] Figure 3 It is a longitudinal cross-section of a tooling used for ion nitriding treatment of the inner holes of sleeve-type parts in Example 1 in use state;

[0021] Figure 4 It is a stereoscopic diagram of a tool used for ion nitriding treatment of the inner holes of sleeve-type parts in Example 2;

[0022] Figure 5 It is a longitudinal cross-section of a tool used for ion nitriding treatment of the inner holes of sleeve-type parts in Example 2;

[0023] Figure 6 This is a longitudinal cross-sectional view of a tooling used for ion nitriding treatment of the inner holes of sleeve-type parts in Example 2 in use;

[0024] Figure 7 It is a longitudinal cross-section of a tool used for ion nitriding treatment of the inner holes of sleeve-type parts in Example 3.

[0025] In the figure: 1, seat cover; 2, cover part blank; 1-1, annular step groove; 1-2, air vent; 1-3, annular boss; 1-4, annular frustum. DETAILED DESCRIPTION

[0026] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0027] Example 1

[0028] like Figures 1 to 3 As shown, the utility model is a tool for ion nitriding treatment of the inner holes of sleeve-like parts, including a seat cover 1, the seat cover 1 has a cavity penetrating the upper and lower end surfaces, the seat cover 1 is provided with a plurality of air holes 1-2 at intervals, and the upper edge surface of the seat cover 1 is adapted to the lower end surface of the sleeve-like part blank 2.

[0029] Preferably, the plurality of ventilation holes 1 - 2 are longitudinal waist holes distributed on the seat cover 1 at intervals in an annular direction.

[0030] Further preferably, the inner circumference of the upper edge surface of the seat cover 1 is provided with an annular step groove 1-1 which sinks into the cavity, and the inner diameter φD of the horizontal bottom surface of the annular step groove 1-1 is less than the outer diameter φA of the sleeve part blank 2 and less than the outer diameter φC of the horizontal bottom surface of the annular step groove 1-1.

[0031] Further preferably, the value range of φC is: φA+1mm~φA+3mm.

[0032] Example 2

[0033] like Figures 4 to 6 As shown, the utility model is a tool for ion nitriding treatment of the inner pores of sleeve-type parts. The difference from the tool for ion nitriding treatment of the inner pores of sleeve-type parts in Example 1 is that the lower end of the seat sleeve 1 is provided with an annular boss 1-3 extending outward, and the lower end surface of the annular boss 1-3 is flush with the lower end surface of the seat sleeve 1.

[0034] Example 3

[0035] like Figure 7 As shown, the utility model is a tool for ion nitriding treatment of the inner pores of sleeve-type parts. The difference from the tool for ion nitriding treatment of the inner pores of sleeve-type parts in Example 1 is that the lower end of the seat sleeve 1 is provided with an annular cone 1-4 extending outward, the large-diameter end of the annular cone 1-4 is located on the lower side, and the lower end surface of the annular cone 1-4 is flush with the lower end surface of the seat sleeve 1.

[0036] The utility model discloses a tooling for ion nitriding treatment of the inner holes of sleeve parts using the following principles:

[0037] Place the cathode disk on a horizontal workbench, place several seat covers 1 on the cathode disk at intervals, and make the distances between adjacent seat covers 1 be 20-30 mm. Then place several sleeve parts 2 to be ion nitrided on the annular step grooves 1-1 at the upper ends of several seat covers 1 (see Appendix). Figure 3 , Attachment Figure 6); perform ion nitriding treatment. After the ion nitriding treatment is completed, the finished sleeve parts are removed from the seat cover 1, and then the cathode disk and the seat cover 1 are put into the ion nitriding treatment of the next batch of sleeve parts blanks 2.

[0038] The utility model discloses a tooling for ion nitriding treatment of inner holes of sleeve-type parts. When in use, a plurality of seat sleeves of the tooling are laid on a cathode disk at intervals, sleeve-type parts blanks to be ion nitrided are placed one by one on the upper end of the seat sleeve, and then the inner hole wall of the sleeve-type parts blank is ion nitrided. Since a plurality of air holes are arranged at intervals on the seat sleeve, the nitrogen ion atmosphere generated after the nitrogen-containing gas is ionized can flow up and down in the inner hole cavity of the sleeve-type parts blank, and then the nitrogen ion atmosphere can be evenly distributed in the inner hole cavity of the sleeve-type parts blank, ensuring that the inner hole wall of the sleeve-type parts finished product after ion nitriding treatment has a uniform nitriding layer, that is, ensuring the hardness uniformity of the inner hole wall of the sleeve-type parts finished product, thereby improving the quality of the sleeve-type parts finished product.

[0039] 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 principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A tool for ion nitriding treatment of the inner holes of sleeve parts, characterized in that: The seat cover (1) comprises a seat cover (1), wherein the seat cover (1) has a cavity penetrating the upper and lower end surfaces, and the seat cover (1) is provided with a plurality of air holes (1-2) at intervals, and the upper edge surface of the seat cover (1) is adapted to the lower end surface of a sleeve-type part blank (2).

2. The tooling for ion nitriding treatment of the inner holes of sleeve parts according to claim 1, characterized in that: Some of the ventilation holes (1-2) are longitudinal waist holes distributed at intervals in an annular direction on the seat cover (1).

3. The tooling for ion nitriding treatment of the inner holes of sleeve parts as claimed in claim 2, characterized in that: The inner circumference of the upper edge surface of the seat sleeve (1) is provided with an annular step groove (1-1) that sinks into the interior of its cavity, and the inner diameter φD of the horizontal bottom surface of the annular step groove (1-1) is less than the outer diameter φA of the sleeve-type part blank (2) and less than the outer diameter φC of the horizontal bottom surface of the annular step groove (1-1).

4. The tooling for ion nitriding treatment of the inner holes of sleeve parts as claimed in claim 3, characterized in that: The value range of φC is: φA+1mm~φA+3mm.

5. The tooling for ion nitriding treatment of the inner holes of sleeve parts according to any one of claims 1 to 4, characterized in that: The lower end of the seat cover (1) is provided with an annular boss (1-3) extending outward, and the lower end surface of the annular boss (1-3) is flush with the lower end surface of the seat cover (1).

6. The tooling for ion nitriding treatment of the inner holes of sleeve parts according to any one of claims 1 to 4, characterized in that: The lower end of the seat cover (1) is provided with an annular cone (1-4) extending outward, the large-diameter end of the annular cone (1-4) is located at the lower side, and the lower end surface of the annular cone (1-4) is flush with the lower end surface of the seat cover (1).

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