Heat treatment tool for gear shaft parts

Abstract

The utility model discloses a heat treatment tool for gear shaft parts, and belongs to the technical field of machining of gear shaft parts. The device comprises a supporting base, supporting stand columns, a mounting plate and a positioning net plate, a plurality of supporting holes are symmetrically formed in the two opposite side edges of the supporting base, one supporting stand column is fixedly inserted into each supporting hole, the supporting stand columns are located between the supporting base and the positioning net plate, and the two ends of each supporting stand column are connected with the supporting base and the positioning net plate respectively; the multiple installation plates penetrate through the four adjacent supporting stand columns through the positioning rings at the four corners to be sequentially installed on the supporting base, every two adjacent installation plates are arranged in a high-low staggered mode, and due to the fact that every two adjacent installation plates are arranged in a high-low staggered mode, gear shafts installed on the different installation plates are also arranged in a high-low staggered mode; and the furnace gas and the quenching medium can uniformly and smoothly run between the gear shafts, so that the gear shafts are uniformly heated and cooled, the deviation between the gear shafts in the same furnace is small, and the consistency is good.

Description

Technical Field

[0001] The utility model relates to the technical field of gear shaft parts processing, in particular to a heat treatment tool for gear shaft parts. Background Art

[0002] Gear shaft parts are one of the commonly used transmission parts in reducers and transmission mechanisms. They are mainly used to support transmission components, transmit torque and bear loads. Common gear shafts include cylindrical surfaces, shaft shoulders, threads, screw tail undercuts, keyways and gears. In the processing of gear shaft parts, the forging blank is first machined into a rough gear shaft. In order to obtain a certain strength, toughness and wear resistance, the gear shaft is also required to undergo a series of heat treatments such as quenching and tempering, quenching, carburizing and tempering. Finally, the heat-treated gear shaft is subjected to subsequent machining processes, such as grinding the shaft body of the gear shaft, tapping, drilling or processing external screws on the journal.

[0003] The gear shaft needs to be fixed and positioned by a tooling during the carburizing and quenching process. The Chinese patent with publication number CN205653488U discloses a gear shaft carburizing tooling, including a base, a positioning mesh plate and a support column, the base includes a mounting sleeve, a rib plate connecting adjacent mounting sleeves and an outer frame; the mounting sleeve is located inside the outer frame, and each of the four corners inside the outer frame is provided with a mounting sleeve; the two ends of the support column extend axially to form a positioning column, the positioning column cooperates with the inner hole of the positioning sleeve, and the diameter of the positioning column is smaller than the diameter of the support column; the positioning mesh plate includes four mounting rings and multiple positioning rings, the four mounting rings are arranged in a rectangular shape on the outside of the multiple positioning rings, the mounting rings and the positioning rings are connected to form a mesh by ribs, the outer diameter of the positioning column is smaller than the inner diameter of the mounting ring, and the inner diameter of the mounting ring is smaller than the outer diameter of the support column.

[0004] The gear shaft carburizing fixture of this structure uniformly fixes the gear shaft, and then performs carburizing and quenching treatment, which is highly efficient; however, the gear shaft carburizing fixture of this structure, all the mounting sleeves are located on the same plane, that is, the gear shafts are set at the same height, and the gears fixed outside the gear shafts are also at the same height, and the gear area is large, and the spacing between adjacent gears is small. During the carburizing and quenching process, due to the obstruction of the gears, the medium cannot flow well during the carburizing process, and the quenching oil cannot flow evenly during the quenching process, so that the gear shaft is unevenly heated and cooled, resulting in large deviations in the carburizing layer depth and hardness of the gear shaft, which makes the performance deviation of the gear shafts in the same furnace large and the consistency of the gear shafts poor. Utility Model Content

[0005] The utility model aims to provide a heat treatment tool for gear shaft parts to solve the problems of uneven heating and cooling of gear shafts, large performance deviation of gear shafts in the same furnace and poor consistency of gear shafts in existing heat treatment tooling.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A heat treatment tooling for gear shaft parts comprises a support seat, a support column, a mounting plate and a positioning mesh plate, wherein a plurality of support holes are symmetrically provided on two opposite sides of the support seat, a support column is fixedly inserted in each of the support holes, the support column is located between the support seat and the positioning mesh plate, and the two ends of the support column are respectively connected to the support seat and the positioning mesh plate; a plurality of the mounting plates are sequentially installed on the support seat through four adjacent support columns via positioning rings at the four corners, and two adjacent mounting plates are staggered in height.

[0008] As a further solution of the utility model: the mounting plate further comprises a plurality of mounting rings, the plurality of mounting rings are connected to form a mesh by ribs, and two adjacent mounting rings are arranged at staggered heights.

[0009] As a further solution of the utility model: the support seat and the mounting plate are separated by a sleeve sleeved on the supporting column, and two adjacent mounting plates are also separated by a sleeve sleeved on the supporting column.

[0010] As a further solution of the utility model: a center hole is opened in the center of the support seat, a center column is fixedly inserted in the center hole, and a plurality of the mounting plates are symmetrically distributed on both sides of the center column.

[0011] As a further solution of the utility model: a plurality of through holes arranged in a honeycomb shape are evenly arranged on the support seat.

[0012] As a further solution of the utility model: the positioning mesh plate is provided with a plurality of positioning sleeves, two adjacent positioning sleeves are connected by ribs, and the positioning sleeves are arranged in a one-to-one correspondence with the mounting rings.

[0013] As a further solution of the utility model: at least the support columns at the four corners of the support seat are sleeved with limiting rings, the positions of the limiting rings on the support columns are adjustable, and the positioning mesh plate is overlapped on the limiting rings.

[0014] The utility model has the following beneficial effects:

[0015] The utility model provides a plurality of mounting plates, and the plurality of mounting plates are sequentially mounted on the support seat through positioning rings at the four corners and through four adjacent supporting columns, and two adjacent mounting plates are staggered in height. The mounting plate also has a plurality of mounting rings, and the plurality of mounting rings are connected to form a mesh through ribs, and two adjacent mounting rings are staggered in height. Due to the staggered height of the two adjacent mounting plates and the staggered height of the two adjacent mounting rings, the gear shafts mounted on different mounting plates are also staggered in height, so that carburizing can better enter the interior and bottom of the tooling, and the carburizing is evenly distributed in the tooling, which effectively reduces the deviation of the carburizing layer depth and hardness, so that the furnace gas and the quenching medium can run evenly and smoothly between the gear shafts, so that the gear shafts are evenly heated and cooled, and the deviation between the gear shafts in the same furnace is small, and the consistency is good.

[0016] The utility model can select a suitable number of mounting plates according to the number of gear shafts. Compared with a whole mounting plate, a plurality of mounting plates that are separately and independently arranged are more flexible and more practical, and can save more energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of a heat treatment tooling for gear shaft parts of the utility model;

[0019] Figure 2 It is a top view schematic diagram of the mounting plate structure of the utility model;

[0020] Figure 3 It is a top view schematic diagram of the support seat structure of the utility model;

[0021] Figure 4 It is a top view schematic diagram of the positioning mesh plate structure of the utility model.

[0022] In the figure: 1. support seat; 11. support hole; 12. center hole; 13. through hole; 2. support column; 3. mounting plate; 31. positioning ring; 32. mounting ring; 4. positioning mesh plate; 41. positioning sleeve; 5. sleeve; 6. center column; 7. limit ring; 8. rib. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1 As shown, the embodiment of the utility model is a heat treatment tool for gear shaft parts, including a support seat 1, a support column 2, a mounting plate 3 and a positioning mesh plate 4.

[0025] like Figure 3 As shown, a plurality of supporting holes 11 are symmetrically provided on two opposite sides of the supporting base 1, and a supporting column 2 is fixedly inserted into each supporting hole 11. Figure 1 As shown, the support column 2 is located between the support base 1 and the positioning mesh plate 4, and the two ends of the support column 2 are respectively connected to the support base 1 and the positioning mesh plate 4; multiple mounting plates 3 are installed on the support base 1 in sequence through four adjacent support columns 2 via positioning rings 31 at the four corners, and two adjacent mounting plates 3 are staggered in height. Due to the staggered height of the two adjacent mounting plates 3, the gear shafts installed on different mounting plates 3 are also staggered in height, so that carburizing can better enter the interior and bottom of the tooling, and the carburizing is evenly distributed in the tooling, which effectively reduces the deviation of the carburizing layer depth and hardness, so that the furnace gas and quenching medium can run evenly and smoothly between the gear shafts, so that the gear shafts are heated and cooled evenly, and the deviation between the gear shafts in the same furnace is small and the consistency is good.

[0026] At the same time, by arranging the support column 2 on the side of the support seat 1, the support column 2 can dissipate heat quickly, and heat will not accumulate at the support column 2. During the carburizing heat treatment, the support column 2 will not affect the cooling rate of the gear shaft, and will not generate thermal stress and structural stress to cause deformation of the gear shaft. The mounting plate 3 provides support for the gear shaft and can also prevent the gear shaft from being heated. After the rigidity is weakened, it will cause axial deformation under the action of its own gravity.

[0027] Furthermore, if Figure 2 As shown, the mounting plate 3 also has a plurality of mounting rings 32, and the plurality of mounting rings 32 are connected to form a mesh by ribs 8, and two adjacent mounting rings 32 are staggered in height. By staggering the mounting rings 32 on the same mounting plate 3, the furnace gas and the quenching medium can run more evenly and smoothly between the gear shafts, so that the gear shafts are heated and cooled evenly, the deviation between the gear shafts in the same furnace is small, and the consistency is good.

[0028] In addition, a suitable number of mounting plates 3 can be selected according to the number of gear shafts. Compared with a whole mounting plate 3, a plurality of mounting plates 3 that are separately and independently arranged are more flexible and more practical, and can save more energy.

[0029] like Figure 1As shown, in this embodiment, the support seat 1 and the mounting plate 3 are separated by a sleeve 5 mounted on the supporting column 2, and two adjacent mounting plates 3 are also separated by a sleeve 5 mounted on the supporting column 2. The sleeve 5 can be slidably mounted on the supporting column 2, and the sizes of the sleeve 5 are different. In specific implementation, the sleeve 5 of appropriate size and number can be selected according to the number and position of the mounting plates 3, and the installation and disassembly are convenient and quick.

[0030] like Figure 3 As shown, in this embodiment, a center hole 12 is opened in the center of the support seat 1, and a center column 6 is fixedly inserted in the center hole 12. Multiple mounting plates 3 are symmetrically distributed on both sides of the center column 6. The setting of the center column 6 improves the stability of the entire tooling and prevents the tooling from shaking, thereby avoiding the gear shafts installed on the mounting plates 3 from colliding with each other, thereby improving product quality.

[0031] Furthermore, if Figure 3 As shown, a plurality of through holes 13 arranged in a honeycomb shape are evenly provided on the support seat 1, so that the furnace gas and the quenching medium can run between the gear shafts more evenly and smoothly.

[0032] like Figure 4 As shown, in this embodiment, the positioning mesh plate 4 has a plurality of positioning sleeves 41, and two adjacent positioning sleeves 41 are connected by ribs 8. The positioning sleeves 41 are arranged one by one with the mounting rings 32, so that the positioning mesh plate 4 can position the gear shaft to prevent tilting and mutual collision. Figure 1 As shown, at least the support columns 2 at the four corners of the support seat 1 are provided with limiting rings 7, and the position of the limiting rings 7 on the support columns 2 is adjustable. The positioning mesh plate 4 is overlapped on the limiting rings 7. By adjusting the height position of the limiting rings 7, the position of the positioning mesh plate 4 on the support columns 2 can be adjusted so that it can be suitable for gear shafts of different heights.

[0033] In actual use, multiple support columns 2 are respectively inserted into the corresponding support holes 11, and then according to the number and size of the heat-treated gear shafts, the appropriate number and size of mounting plates 3 and sleeves 5 are selected, and the sleeves 5 and mounting plates 3 are installed on the support columns 2 of the support seat 1 accordingly. Figure 1 As shown, the mounting plates 3 on both sides of the center column 6 are staggered in height, and then the gear shaft is vertically installed in the mounting ring 32 on the mounting plate 3 in turn, and then the positioning mesh plate 4 is installed on the supporting column 2, and the height position of the limit ring 7 is adjusted according to the size of the gear shaft, so that the top end of the gear shaft is respectively inserted into the corresponding positioning sleeve 41 on the positioning mesh plate 4, so that the positioning mesh plate 4 positions the gear shaft.

[0034] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "front", "back", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation. Therefore, it should not be understood as a limitation on the present invention.

[0035] In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0036] The above detailed description of the preferred embodiments of the utility model should not be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A heat treatment tool for gear shaft parts, comprising a support seat (1), a support column (2), a mounting plate (3) and a positioning mesh plate (4), wherein the support seat (1) has a plurality of support holes (11) symmetrically arranged on two opposite sides, and a support column (2) is fixedly inserted in each of the support holes (11), the support column (2) is located between the support seat (1) and the positioning mesh plate (4), and the two ends of the support column (2) are respectively connected to the support seat (1) and the positioning mesh plate (4); characterized in that: The plurality of mounting plates (3) are sequentially mounted on the support seat (1) by passing through four adjacent supporting columns (2) via positioning rings (31) at the four corners, and two adjacent mounting plates (3) are staggered in height.

2. A heat treatment tool for gear shaft parts according to claim 1, characterized in that: The mounting plate (3) further comprises a plurality of mounting rings (32), wherein the plurality of mounting rings (32) are connected to form a network through ribs (8), and two adjacent mounting rings (32) are arranged in a staggered manner.

3. A heat treatment tool for gear shaft parts according to claim 2, characterized in that: The support seat (1) and the mounting plate (3) are separated by a sleeve (5) sleeved on the supporting column (2), and two adjacent mounting plates (3) are also separated by a sleeve (5) sleeved on the supporting column (2).

4. A heat treatment tool for gear shaft parts according to claim 1, characterized in that: A central hole (12) is provided at the center of the support seat (1), a central column (6) is fixedly inserted in the central hole (12), and a plurality of mounting plates (3) are symmetrically distributed on both sides of the central column (6).

5. A heat treatment tool for gear shaft parts according to claim 4, characterized in that: The support seat (1) is evenly provided with a plurality of through holes (13) arranged in a honeycomb shape.

6. A heat treatment tool for gear shaft parts according to claim 2, characterized in that: The positioning mesh plate (4) is provided with a plurality of positioning sleeves (41), two adjacent positioning sleeves (41) are connected via ribs (8), and the positioning sleeves (41) and the mounting rings (32) are arranged in a one-to-one correspondence.

7. A heat treatment tool for gear shaft parts according to any one of claims 1 to 6, characterized in that: At least the support columns (2) at the four corners of the support seat (1) are sleeved with limiting rings (7), the position of the limiting rings (7) on the support columns (2) is adjustable, and the positioning mesh plate (4) is overlapped on the limiting rings (7).

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