Tool for reducing plane deformation of workpiece after carburizing and quenching

Abstract

The utility model provides a tooling for reducing the plane deformation after carburizing and quenching of workpiece, including main part, suspension device and spacing device, main part includes centre post, base, vertical plate and claw plate, suspension device includes a plurality of post sleeve and a plurality of hanging post. According to the tool, central through holes of parts such as gears are utilized, the parts are hung on the hanging columns, in order to ensure the universality of the tool, the distance between the hanging columns can be freely adjusted by adopting the isolation pads with different sizes, and the charging amount of the parts with different outer diameters can be increased to the maximum extent. The bottom of the tool is supported by a triangular base, and the stability of the tool can be guaranteed. The tool is small in deformation in the using process, the plane deformation of the part can be greatly reduced, the follow-up leveling procedure is reduced, the service life is greatly prolonged, the tool is stable and reliable during hoisting, furnace entering and exiting are convenient and fast, and the labor intensity of workers is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of heat treatment frock, concretely relates to a frock for reducing the planar deformation of workpiece after carburizing and quenching. BACKGROUND

[0002] The thickness of a certain gear is 20mm, the diameter is 400mm, a through hole with a diameter of 80mm is processed in the middle, the material of the gear is 20Cr2Ni4A, which belongs to alloy structural steel, needs to be treated by carburizing and quenching, and the surface hardness is greater than or equal to 59HRC. In order to ensure the follow-up processing of carburizing and quenching, the cold and hot processing allowance is very small, and the end face allowance is only 0.15mm. Since the diameter of the part is large, and the flatness of the part needs to be ensured, it is suitable to adopt the suspension type loading furnace, and vertical quenching is carried out to ensure the flatness of the part.

[0003] The stage of deformation prone to occur during gear carburizing and quenching is mainly in the carburizing and quenching holding stage, and the deformation degree is greatly affected by the loading method. Since the carburizing frock needs to be heated in the furnace for a long time, the frock inevitably produces partial deformation, and if the part is placed on the deformed frock plate for quenching, the heat treatment deformation of the part will be greatly increased. Therefore, a frock capable of suspending the part is needed to be designed, so that the part is in a vertical state during heating in the furnace, and the planar deformation of the part after heat treatment is greatly reduced. UTILITY MODEL CONTENTS

[0004] (I) Technical problem to be solved

[0005] The utility model provides a frock for reducing the planar deformation of workpiece after carburizing and quenching to solve the technical problem of how to reduce the planar deformation of workpiece after carburizing and quenching.

[0006] (II) Technical scheme

[0007] In order to solve the above technical problem, the utility model provides a frock for reducing the planar deformation of workpiece after carburizing and quenching, which comprises a main body part, a suspension device and a spacing device, wherein,

[0008] The main body part comprises a central column, a base, a vertical plate and a claw plate; the central column mounting hole is arranged in the center of the base, and a plurality of vertical plate mounting notches are processed on the outer periphery of the base; the bottom of the central column is inserted into the central column mounting hole of the base and is welded and fixed with the base; a plurality of vertical plates are respectively inserted into the vertical plate mounting notches on the base and are welded and fixed with the base, and the bottom of each vertical plate is welded and fixed with the claw plate;

[0009] The suspension device is used for suspending the part, so that the part is vertically loaded into the furnace, and comprises a plurality of column sleeves and a plurality of hanging columns; the column sleeve is a round sleeve structure and is sleeved on the central column; the hanging column is welded and fixed on the circumferential sidewall of each column sleeve;

[0010] The spacing device is used for separating a plurality of column sleeves sleeved on the center column and adjusting positions of the different column sleeves.

[0011] Further, the material of the main body part is Q235.

[0012] Further, the outer periphery of the base is uniformly distributed with a plurality of stand plate mounting notches.

[0013] Further, the claw plate is welded and fixed at the bottom notch of the stand plate.

[0014] Further, the circumferential side wall of each column sleeve is uniformly processed with a plurality of column hanging mounting blind holes, the front section of the column hanging is inserted into the column hanging mounting blind hole and welded and fixed with the column sleeve, and the rear section of the column hanging is used for hanging parts.

[0015] Further, the material of the spacing device is Q235.

[0016] Further, the spacing device comprises an upper spacer and a lower spacer; the upper spacer and the lower spacer are the same in structure, but the thickness of the upper spacer is greater than that of the lower spacer.

[0017] Further, the upper spacer and the lower spacer are both cylindrical structures, and the center of the cylinder is provided with a center column mounting hole.

[0018] Further, the front and rear ends of the center column mounting hole are processed with weight reduction holes with a larger inner diameter than the center column mounting hole.

[0019] Further, the outer periphery of the upper spacer and the lower spacer is processed with radial weight reduction holes.

[0020] (Three) beneficial effects

[0021] The utility model provides a kind of tool for reducing the planar deformation of workpiece carburizing quenching, including main body part, suspension device and spacing device, and the main body part includes center column, base, stand plate and claw plate, and the suspension device includes a plurality of column sleeves and a plurality of column hangings.This tool utilizes the central through hole of gear and other parts, is hung on column hanging, to ensure the versatility of tool, uses spacer of different sizes to make the distance between column hanging freely adjustable, and for the parts of different outer diameters, can maximize increase furnace load quantity.Tool bottom uses triangular seat support, can guarantee tool stability.Tool is smaller in deformation in use process, can greatly reduce the planar deformation of part, reduce subsequent leveling process, service life is greatly extended, tool hoisting is stable and reliable, convenient and fast in and out of furnace, greatly reduce the labor intensity of worker. DRAWINGS

[0022] Figure 1 It is the three-dimensional structure schematic diagram of the tool for reducing the planar deformation of workpiece carburizing quenching of the utility model;

[0023] Figure 2 It isFigure 1 AA section view;

[0024] Figure 3a This is a front view of the base structure in this utility model. Figure 3b This is a top view;

[0025] Figure 4a This is the main view of the central column sleeve structure of this utility model. Figure 4b This is a top view;

[0026] Figure 5a This is a front view of the upper and lower spacer structure in this utility model. Figure 5b This is a top view. Detailed Implementation

[0027] To make the objectives, contents, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0028] This embodiment proposes a tooling for reducing the planar deformation of a workpiece after carburizing and quenching. Its overall structure is as follows: Figure 1 and 2 As shown, the tooling mainly consists of three parts: the main body, the suspension device, and the spacing device.

[0029] The main body is made of Q235 steel and mainly includes the central column 5, base 6, upright plate 7, and claw plate 8. For example... Figure 3a and 3b As shown, a central column mounting hole is provided in the center of the base 6, and three vertical plate mounting notches are evenly distributed on the outer perimeter of the base 6. The bottom of the central column 5 is inserted into the central column mounting hole of the base 6 and welded to the base 6. The three vertical plates 7 are respectively inserted into the three vertical plate mounting notches on the base 6 and welded to the base 6. In order to enable the tooling to be placed stably in the furnace through the vertical plates 7, three claw plates 8 are respectively welded to the bottom notches of the three vertical plates 7 to increase the contact area with the ground and increase the stability of the tooling.

[0030] The suspension device is used to suspend parts, allowing them to be loaded vertically into the furnace and reducing deformation during heat treatment. It mainly includes multiple column sleeves 1 and multiple hanging columns 2. For example... Figure 4a and 4b As shown, the column sleeve 1 is a circular sleeve structure that fits onto the central column 5. Each column sleeve 1 has three blind holes for mounting the hanging column evenly machined on its circumferential sidewall. The total length of the hanging column 2 is 245mm. The front 40mm sections of the three hanging columns 2 are inserted into one of the blind holes for mounting the hanging column and welded to the column sleeve 1. The remaining 200mm section of the rear section of the hanging column 2 is used to suspend the parts.

[0031] The spacer device is used for separating the plurality of column sleeves 1 sleeved on the center column 5 and adjusting the positions of the different column sleeves 1, mainly comprising an upper spacer pad 3 and a lower spacer pad 4, and the materials of the upper spacer pad 3 and the lower spacer pad 4 are both Q235. Figure 5a and 5b As shown in Figs. 8 and 9, the upper spacer pad 3 and the lower spacer pad 4 are both cylindrical structures, the center of the cylinder is provided with a center column mounting hole, and the front and rear ends of the center column mounting hole are processed with weight-reducing holes with a larger inner diameter than the center column mounting hole. The outer periphery of the cylinder is uniformly processed with a plurality of radial weight-reducing holes. In use, the upper spacer pad 3 and the lower spacer pad 4 are combined in different numbers according to the needs, and are arranged between every two column sleeves 1, so as to change the interval between the two column sleeves 1, thereby playing a role of taking into account different sizes of gear or gear ring parts, greatly improving the universality of the tooling, and reducing the production cost.

[0032] By using the tooling, the problem of planar deformation of the workpiece after carburizing and quenching can be solved, and the part planar deformation is reduced from about 0.5mm to below 0.2mm; the tooling can be used for different sizes of parts, has strong universality, and according to the main part, the tooling disc can be added as a support, the tooling form is changed, different parts production is adapted, the workpiece deformation is greatly reduced, the workpiece flatness is improved, the leveling process is reduced, and the labor intensity of workers is reduced.

[0033] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and deformations can be made, and these improvements and deformations should also be considered as the protection scope of the present application.

Claims

1. A jig for reducing the amount of flatness distortion of a workpiece after carburizing and quenching, characterized by, The tooling comprises a main body part, a hanging device and a spacing device; wherein, The main body part comprises a center column, a base, a vertical plate and a claw plate; the center of the base is provided with a center column mounting hole, and the outer periphery of the base is processed with a plurality of vertical plate mounting notches; the bottom of the center column is inserted into the center column mounting hole of the base and is welded and fixed with the base; a plurality of vertical plates are respectively inserted into the vertical plate mounting notches on the base and are welded and fixed with the base, and the bottom of each vertical plate is welded and fixed with a claw plate; The hanging device is used for hanging parts, and makes the parts vertically loaded into the furnace, and comprises a plurality of column sleeves and a plurality of hanging columns; the column sleeve is a round sleeve structure, which is sleeved on the center column; the circumferential sidewall of each column sleeve is welded and fixed with a hanging column; The spacing device is used for spacing a plurality of column sleeves sleeved on the center column, and adjusting the positions of different column sleeves.

2. The tooling for reducing the amount of flatness distortion of a workpiece after carburizing and quenching of claim 1, wherein, The material of the main body part is Q235.

3. The tooling for reducing the amount of flatness distortion of a workpiece after carburizing and quenching of claim 1, wherein, The outer periphery of the base is uniformly distributed with a plurality of vertical plate mounting notches.

4. The tooling for reducing the amount of flatness distortion of a workpiece after carburizing and quenching of claim 1, wherein, The claw plate is welded and fixed at the bottom notch of the vertical plate.

5. The tooling for reducing the amount of flatness distortion of a workpiece after carburizing and quenching of claim 1, wherein, The circumferential sidewall of each column sleeve is uniformly processed with a plurality of hanging column mounting blind holes, the front section of the hanging column is inserted into the hanging column mounting blind hole and is welded and fixed with the column sleeve, and the rear section of the hanging column is used for hanging parts.

6. The tooling for reducing the amount of flatness distortion of a workpiece after carburizing and quenching of claim 1, wherein, The material of the spacing device is Q235.

7. The tooling for reducing the amount of flatness distortion of a workpiece after carburizing and quenching of claim 1, wherein, The spacing device comprises an upper spacer and a lower spacer; the upper spacer and the lower spacer are the same in structure, but the thickness of the upper spacer is greater than that of the lower spacer.

8. The tooling for reducing the amount of flatness distortion of a workpiece after carburizing and quenching of claim 7, wherein, The upper spacer and the lower spacer are both cylindrical structures, and the cylindrical center is provided with a center column mounting hole.

9. The tooling for reducing the amount of flatness distortion of a workpiece after carburizing and quenching of claim 8, wherein, The front and rear ends of the center column mounting hole are processed with weight reduction holes with a larger inner diameter than the center column mounting hole.

10. The tooling for reducing the amount of flatness distortion of a workpiece after carburizing and quenching of claim 8, wherein, The outer periphery of the upper spacer and the lower spacer is processed with radial weight reduction holes.

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