Heat treatment tool for salt bath nitriding of tubular parts

Abstract

The utility model discloses a heat treatment tool for salt bath nitriding of tubular parts, which comprises a base, a support component arranged on the base, a contact component arranged on the support component and a telescopic component arranged at the bottom of the support component, the supporting assembly comprises a plurality of supporting bases arranged on the base and a plurality of supporting rods arranged on the supporting bases. The contact assembly comprises a plurality of contact seats arranged on the tops of the plurality of supporting rods, and a plurality of contact pipelines arranged on the plurality of contact seats; the telescopic assembly comprises a plurality of telescopic bases arranged at the bottoms of the supporting rods and a plurality of telescopic rods arranged on the telescopic bases. Through cooperation of the telescopic rod and the pressure sensor, the tubular part is not prone to shaking in the salt bath nitriding process, and the outer surface of the part is not damaged.

Description

TECHNICAL FIELD

[0001] The utility model relates to salt bath nitriding technical field especially relates to a kind of heat treatment tooling for tubular part salt bath nitriding. BACKGROUND

[0002] Salt bath nitriding involves immersing workpiece into molten salt bath containing nitriding salt, at certain temperature, nitrogen, carbon and other atoms in salt bath permeate into workpiece surface layer, form a compound layer and diffusion layer, thereby improve the performance of workpiece surface, in this process, cyanate in nitriding salt bath decomposes to form active nitrogen atom, form wear-resistant and high-erosion-resistant compound layer and fatigue-resistant diffusion layer on metal surface, salt bath nitriding is widely used in automobile parts, light industry machinery, hydraulic machinery, gears, tools and die manufacturing and many other industries. Bicycle front fork tube, due to the requirement of high surface finish on outer surface, using conventional tooling during salt bath nitriding process will produce marks.

[0003] At present, the existing heat treatment tooling, when applied to tubular part in salt bath nitriding treatment, still has the following problems: the conventional tooling generally uses corresponding specification metal mesh, and the parts are placed in the mesh, and the parts are spaced apart, but the parts need to be spaced apart by mesh holes, otherwise the parts will have the opportunity to contact each other, resulting in contact marks, and the contact marks will inevitably exist at the contact part between the parts and the mesh, although the contact marks do not affect the hardness and depth of nitriding, but the unevenness on the appearance may cause the change of roughness, and the parts may be scratched when taken out from the mesh after nitriding.

[0004] Therefore, it is necessary to provide a heat treatment tooling for tubular part salt bath nitriding to solve the above technical problems. SUMMARY

[0005] The utility model overcomes the insufficient prior art, provides a kind of heat treatment tooling for tubular part salt bath nitriding.

[0006] To achieve the above object, the utility model adopts the technical scheme as follows: a kind of heat treatment tooling for tubular part salt bath nitriding, comprising: base, support assembly being arranged on the base, contact assembly being arranged on the support assembly, and telescopic assembly being arranged at the bottom of the support assembly;

[0007] The support assembly includes: a plurality of support seats arranged on the base, a plurality of support rods arranged on a plurality of support seats;

[0008] The contact assembly includes: a plurality of contact seats arranged on the top of a plurality of support rods, a plurality of contact pipes arranged on a plurality of contact seats;

[0009] The telescopic assembly comprises a plurality of telescopic seats arranged at the bottom of the plurality of support rods, and a plurality of telescopic rods arranged on the plurality of telescopic seats.

[0010] In a preferred embodiment of the utility model, a plurality of short lines are arranged on the plurality of telescopic seats, a plurality of buckles are connected to the plurality of short lines, and the plurality of short lines are connected through the plurality of buckles.

[0011] In a preferred embodiment of the utility model, a pressing assembly is arranged in the plurality of contact pipes, and the plurality of contact pipes are made of iron.

[0012] In a preferred embodiment of the utility model, the plurality of support assemblies are arranged at equal distances, and the axes of the plurality of support assemblies are on the same horizontal line.

[0013] In a preferred embodiment of the utility model, a connecting rod is arranged at the middle part of the plurality of bases, and the plurality of bases are connected to each other through the connecting rod.

[0014] The utility model solves the defects in the background art and has the following beneficial effects:

[0015] (1) In the utility model, a plurality of telescopic rods are arranged on a plurality of telescopic seats, the other ends of the plurality of telescopic rods are provided with a plurality of contact plates, the telescopic rods can drive the contact plates to move in parallel to adapt to tubular parts of different diameters, a plurality of pressure sensors are arranged on the plurality of contact plates, when the contact plates contact the inner walls of the tubular parts during movement, the values of the pressure sensors will change due to the change of pressure, and the operator adjusts the positions of the telescopic rods according to the readings of the pressure sensors to ensure that the tubular parts are subjected to uniform and appropriate pressure during the salt bath nitriding process and are clamped, so that the tubular parts will not easily shake, a plurality of short lines are arranged on the plurality of telescopic seats, a plurality of buckles are connected to the plurality of short lines, and the plurality of short lines are connected through the plurality of buckles.

[0016] (2) The utility model discloses a contact pipeline is provided with the press bar, is provided with the press pipe on the press bar, when the tubular part of needing installation is too high, can stretch the press pipe, make the length increase of press pipe, tubular part is too low, can press press pipe, make the length of press pipe reduce, and the length of press pipe is adjusted according to the need, to adapt to the tubular part of different height. Then the tubular part is placed on the support assembly, and the top of the inner wall of the tubular part contacts the top of the press pipe, so that the tubular part does not shake and tilt during the salt bath nitriding process, improving the stability and safety of the treatment process.

[0017] (3) The utility model discloses a plurality of pedestals are arranged on the protective iron ring at both ends, and a connecting rod is arranged in the middle part of the pedestal. The plurality of pedestals are connected to each other through the connecting rod. A center sleeve is arranged at the center of the protective iron ring. The center sleeve can be clamped during salt bath nitriding, and the entire protective iron ring and pedestal are moved, and the entire pedestal is immersed in the salt bath, so that the tubular parts placed on the support assembly are immersed in the salt bath for salt bath nitriding. Multiple tubular parts can be salt bath nitrided at the same time, improving production efficiency and reducing the time and cost required for processing a single part. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model will be further described below in combination with the drawings and examples.

[0019] Figure 1 is the perspective view of the preferred embodiment of the utility model;

[0020] Figure 2 is the perspective view of the telescopic assembly and press assembly of the preferred embodiment of the utility model;

[0021] Figure 3 is the telescopic assembly diagram of the preferred embodiment of the utility model;

[0022] Figure 4 is the press assembly diagram of the preferred embodiment of the utility model;

[0023] Figure 5 is the overall plan view of the preferred embodiment of the utility model;

[0024] In the drawing: 1, pedestal;2, support seat;3, support rod;4, contact seat;5, contact pipeline;6, telescopic seat;7, telescopic rod;8, contact plate;9, pressure sensor;10, short line;11, lock catch;12, press pipe;13, press bar;14, connecting rod;15, protective iron ring;16, center sleeve. DETAILED DESCRIPTION

[0025] The utility model will be further explained in detail in combination with the drawings and embodiments, these drawings are all simplified schematic diagram, only with the schematic way the basic structure of the utility model is explained, therefore it only shows the related structure of the utility model.

[0026] As Figures 1-5 Indicated, a kind of for tubular part salt bath nitriding heat treatment tooling, comprising: pedestal 1, support assembly being arranged on pedestal 1, contact assembly being arranged on support assembly, and telescopic component being arranged at the bottom of support assembly;

[0027] In the utility model, support assembly includes: several support seats 2 being arranged on pedestal 1, several support rods 3 being arranged on several support seats 2;

[0028] In the utility model, contact assembly includes: several contact seats 4 being arranged on the top of several support rods 3, several contact pipes 5 being arranged on several contact seats 4;Contact seat 4 is arranged on the top of support rod 3, provides a stable support point for contact pipe 5, ensures that tubular part does not occur displacement or tilt in salt bath nitriding process.

[0029] In the utility model, telescopic component includes: several telescopic seats 6 being arranged on the bottom of several support rods 3, and several telescopic rods 7 being arranged on several telescopic seats 6, another end of several telescopic rods 7 is provided with several contact plates 8, and several contact plates 8 are provided with several pressure sensors 9.Telescopic rod 7 telescopic can drive contact plate 8 to move in parallel, to adapt to tubular part of different diameters, and several contact plates 8 are provided with several pressure sensors 9, when contact plate 8 is contacted with the inner wall of tubular part along with moving, the value of pressure sensor 9 will change due to the change of pressure, and operator adjusts the position of telescopic rod 7 according to the reading of pressure sensor 9, to ensure that tubular part is subjected to uniform and proper pressure in salt bath nitriding process and then carries out location clamping to tubular part, so that tubular part does not easily shake.

[0030] In the utility model, several telescopic seats 6 are provided with several short lines 10, several short lines 10 are connected with several lock buckles 11, and several short lines 10 are connected by several lock buckles 11.The existence of lock buckle 11 can ensure that entire telescopic component is quickly locked and unlocked in necessary occasion, without complex steps, which simplifies operation process.

[0031] The utility model discloses, if the tubular part that needs installation is too high, can stretch press pipe 12, make the length increase of press pipe 12, the tubular part is too low, can press press pipe 12, make the length of press pipe 12 reduce, and press pipe 12 allows its length to adjust according to the need, to adapt to the tubular part of different height.

[0032] The utility model discloses, a plurality of support assemblies equidistance arrangement, the axis of a plurality of support assemblies is on same horizontal line, base 1 has a plurality of, and the length of a plurality of base 1 is not identical, and a plurality of base 1 is parallelly arranged between. The parallel arrangement between base 1 can effectively utilize space, and when processing multiple tubular parts, the capacity of salt bath tank can be maximized.

[0033] The utility model discloses, and the both ends of a plurality of base 1 are set on protection iron ring 15, and protection iron ring 15 presents circular, and the middle part of a plurality of base 1 is provided with a connecting rod 14, and a plurality of base 1 is connected through connecting rod 14 and is connected with each other, and the center of protection iron ring 15 is provided with a center sleeve 16, and center sleeve 16 sets up on the intersection of connecting rod 14 and base 1. Through clamping center sleeve 16, the whole protection iron ring 15 and base 1 can be conveniently moved, so that the process of tubular part is immersed in salt bath is more efficient, and through simultaneously processing multiple tubular parts, the time and cost required for processing single part are reduced, and the production efficiency is improved.

[0034] The utility model discloses when using, place multiple tubular parts to be handled on the support subassembly, ensure that the contact seat 4 contacts tubular parts, and the clamping center sleeve 16 can conveniently move the whole protection iron ring 15 and base 1, make multiple tubular parts are drowned in salt bath. When the pipe inner diameter of tubular parts is bigger, install telescopic subassembly at the bottom of support rod 3, connect through the lock catch 11 and broken line, lock the lock catch 11 to fix the position of telescopic subassembly, control telescopic rod 7 telescopic drive contact plate 8 parallel movement to adapt to the tubular parts of different diameters, when contact plate 8 moves and contacts the inner wall of tubular parts, the value of pressure sensor 9 will change with the change of pressure, and the operator adjusts the position of telescopic rod 7 according to the reading of pressure sensor 9, and contact plate 8 is limited to clamp tubular parts, so that the part is not easy to shake. When tubular parts are too high, install pressing rod 13 in contact pipe 5, and the pressing rod 13 is connected with pressing pipe 12, according to the height of tubular parts, stretch or compress pressing pipe 12 to adjust its height, ensure that pressing pipe 12 contacts the top of tubular parts, prevent the part from shaking and tilting in the process of salt bath nitriding. According to different tubular parts height and inner wall diameter width, judge whether telescopic subassembly, pressing rod 13 and pressing pipe 12 are installed, then clamping center sleeve 16, moving the whole protection iron ring 15 and base 1, make multiple tubular parts are drowned in salt bath, and carry out salt bath nitriding.

[0035] According to the ideal embodiment of the utility model, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the utility model. The technical scope of the utility model is not limited to the content of the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A heat treatment fixture for salt bath nitriding of tubular parts, comprising: A base (1), a support assembly disposed on the base (1), a contact assembly disposed on the support assembly, and a telescopic assembly disposed at the bottom of the support assembly, characterized in that: The support assembly includes: a plurality of support seats (2) disposed on the base (1), and a plurality of support rods (3) disposed on the plurality of support seats (2); The contact assembly includes: a plurality of contact seats (4) disposed on the top of a plurality of support rods (3), and a plurality of contact pipes (5) disposed on a plurality of contact seats (4); The telescopic assembly includes: a plurality of telescopic seats (6) disposed on the bottom of a plurality of support rods (3), and a plurality of telescopic rods (7) disposed on a plurality of telescopic seats (6).

2. The heat treatment fixture for salt bath nitriding of tubular parts according to claim 1, characterized in that: The other end of each of the telescopic rods (7) is provided with a plurality of contact plates (8), and a plurality of pressure sensors (9) are provided on the plurality of contact plates (8).

3. The heat treatment fixture for salt bath nitriding of tubular parts according to claim 1, characterized in that: A plurality of short wires (10) are provided on a plurality of the telescopic seats (6), and a plurality of latches (11) are connected to the plurality of the short wires (10), and the plurality of short wires (10) are connected to each other through the plurality of latches (11).

4. The heat treatment fixture for salt bath nitriding of tubular parts according to claim 1, characterized in that: A pressing component is provided inside several of the contact pipes (5), and the material of several of the contact pipes (5) is iron.

5. A heat treatment fixture for salt bath nitriding of tubular parts according to claim 4, characterized in that: The pressing assembly includes a plurality of pressing rods (13) disposed within a plurality of contact pipes (5), and pressing tubes (12) connected to the plurality of pressing rods (13).

6. A heat treatment fixture for salt bath nitriding of tubular parts according to claim 1, characterized in that: The support components are arranged at equal intervals, and the axes of the support components are on the same horizontal line.

7. A heat treatment fixture for salt bath nitriding of tubular parts according to claim 1, characterized in that: There are several bases (1), the lengths of the bases (1) are different, and the bases (1) are arranged in parallel.

8. A heat treatment fixture for salt bath nitriding of tubular parts according to claim 1, characterized in that: The two ends of several of the bases (1) are set on a protective iron ring (15), which is circular.

9. A heat treatment fixture for salt bath nitriding of tubular parts according to claim 1, characterized in that: A connecting rod (14) is provided in the middle part of several of the bases (1), and the several bases (1) are connected to each other through the connecting rod (14).

10. A heat treatment fixture for salt bath nitriding of tubular parts according to claim 8, characterized in that: A central sleeve (16) is provided at the center of the protective iron ring (15).

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