A tooling for heat treatment of shafts

Abstract

This utility model relates to the field of workpiece heat treatment technology, specifically a tooling for shaft heat treatment. The supporting tray is rectangular and has a first honeycomb mesh-like tie rod. The carrying tray is also rectangular and has a second honeycomb mesh-like tie rod. At least one intersection of the second mesh of the second honeycomb mesh-like tie rod has a mounting hole for the tapered section and the main shaft section to pass through sequentially, so that the edge of the mounting hole supports the stage. One end of the apex support is connected to the supporting tray near the apex, and the other end is connected to the carrying tray near the apex. One end of the center support is connected to the center point of the supporting tray, and the other end is connected to the center point of the carrying tray. This utility model supports and limits the shaft at two positions, reducing shaft bending deformation after heat treatment, reducing the use of correction equipment, and thus improving the pass rate of shaft heat treatment.

Description

Technical Field

[0001] This utility model relates to the field of workpiece heat treatment technology, specifically a tooling for shaft heat treatment. Background Technology

[0002] Currently, when heat treating shafts, a suspended fixture is usually used. A fitting bolt and a heat-resistant steel wire are welded together as a whole. The heat-resistant steel wire is fixed on the suspended fixture, and then the fitting bolt is tightened to the side threaded hole on the shaft to fix it, so that the shaft hangs naturally vertically on the fixture, and then the workpiece is heat treated.

[0003] However, the bending deformation of the shaft after heat treatment is between 2.5mm and 3mm. Cracks are easily generated during the process of correcting the bending with straightening equipment, and the scrap rate is about 40%, which in turn leads to a low pass rate of heat treatment of shaft parts. Utility Model Content

[0004] In view of the deficiencies of the prior art, this utility model provides a tooling for heat treatment of shafts. It uses a load-bearing tray and a material-carrying tray to support and limit the two positions of the shaft end face and the stage, which can reduce the bending deformation of the shaft after heat treatment, reduce the use of correction equipment, and thus improve the pass rate of shaft heat treatment.

[0005] To achieve the above objectives, the present invention provides a tooling for heat treatment of shaft components. The shaft component includes a main shaft section, a tapered section at one end of the main shaft section, and a stepped section at the other end of the main shaft section. The main shaft section, tapered section, and stepped section are coaxial, and the diameter of the stepped section is larger than that of the main shaft section. The tooling includes a load-bearing tray, a material-carrying tray, four corner supports, and a central support. The load-bearing tray is rectangular and has a first honeycomb mesh-like brace. The material-carrying tray is also rectangular. The material tray is provided with a second honeycomb mesh-like tie rod. At least one second grid intersection of the second honeycomb mesh-like tie rod is provided with a mounting hole. The mounting hole is used for the tapered section and the main shaft section to pass through in sequence, so that the edge of the mounting hole supports the platform stage. One end of the top corner support is connected to the top corner of the load-bearing material tray, and the other end of the top corner support is connected to the top corner of the material-carrying tray. One end of the central support is connected to the center point of the load-bearing material tray, and the other end of the central support is connected to the center point of the material-carrying tray.

[0006] Furthermore, the intersection points of the first honeycomb mesh-like tie rod and the second honeycomb mesh-like tie rod correspond one-to-one in the vertical direction.

[0007] Furthermore, at least one of the first grid intersections of the first honeycomb mesh brace is used to support one end face of the shaft.

[0008] Furthermore, the distance between the load-bearing tray and the material-carrying tray is equal to the axial distance between the junction of the stage and the main shaft section and the end face of the shaft near the tapered section.

[0009] Furthermore, the first honeycomb mesh-like brace has a hexagonal mesh structure.

[0010] Furthermore, the second honeycomb mesh-like brace has a hexagonal mesh structure.

[0011] Furthermore, the load-bearing tray has first support mounting holes near its four corners, and the material-carrying tray has third support mounting holes near its four corners. One end of the corner support is connected to the first support mounting hole, and the other end of the corner support is connected to the third support mounting hole.

[0012] Furthermore, the load-bearing tray is provided with a first corner reinforcing plate near the four corners, and the first support mounting hole is opened in the first corner reinforcing plate;

[0013] The material loading tray is provided with a second corner reinforcement plate near the four corners, and the third support mounting hole is opened in the second corner reinforcement plate.

[0014] Furthermore, a second support mounting hole is provided at the center point of the load-bearing tray; a fourth support mounting hole is provided at the center point of the material-carrying tray, one end of the central support is connected to the second support mounting hole, and the other end of the central support is connected to the fourth support mounting hole.

[0015] The beneficial effects of this utility model are as follows: It is equipped with a load-bearing tray and a material-carrying tray. The load-bearing tray supports the end face of the shaft, and the main weight of the shaft is supported on the load-bearing tray. The intersections of the first honeycomb mesh reinforcement bars support the end face of the shaft. Simultaneously, the mounting holes on the upper material-carrying tray limit the movement of the shaft. The tooling used for shaft heat treatment supports and limits the two positions of the shaft, which can reduce shaft bending deformation after heat treatment, reduce the use of correction equipment, and thus improve the pass rate of shaft heat treatment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a tooling for shaft heat treatment in one embodiment of the present invention;

[0017] Figure 2 This is a diagram showing the state of a shaft during heat treatment in the prior art;

[0018] Figure 3 This is a schematic diagram of the structure of the load-bearing tray in one embodiment of the present invention;

[0019] Figure 4This is a schematic diagram of the structure of the material tray in one embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the top corner support structure in one embodiment of the present invention;

[0021] Figure 6 This is a schematic diagram of the central support column in one embodiment of the present invention;

[0022] Figure 7 This is a schematic diagram of the shaft component in one embodiment of the present invention;

[0023] In the picture:

[0024] 1. Shaft component; 11. Main shaft section; 12. Tapered section; 13. Table-shaped section; 14. End face.

[0025] 100. Load-bearing tray; 110. First honeycomb mesh tie rod; 111. First mesh intersection point; 120. First support mounting hole; 130. First top corner reinforcing plate; 140. Second support mounting hole.

[0026] 200. Material tray; 210. Second honeycomb mesh brace; 211. Second mesh intersection point; 2111. Mounting hole; 220. Third support mounting hole; 230. Second apex reinforcement plate; 240. Fourth support mounting hole.

[0027] 300. Corner support; 310. First convex ring.

[0028] 400. Central support; 410. Second convex ring.

[0029] 20. Heat-resistant steel wire; 30. Matching bolts; 40. Suspended fixture. Detailed Implementation

[0030] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0031] Figure 2 The diagram shows a state diagram of heat treatment of shaft components using a suspended fixture in the prior art. The mating bolt 30 and the heat-resistant steel wire 20 are welded into a whole. The heat-resistant steel wire 20 is fixed on the suspended fixture 40. The shaft component 10 is naturally placed vertically on the suspended fixture 40 for heat treatment. With this treatment, the shaft has a large bending deformation after heat treatment.

[0032] See Figure 1 This diagram illustrates the structure of a tooling for heat treatment of a shaft 10 according to an embodiment of the present invention. Figure 7 As shown, the shaft 10 includes a main shaft section 11, a tapered section 12 disposed at one end of the main shaft section 11, and a stepped section 13 disposed at the other end of the main shaft section 11. The main shaft section 11, the tapered section 12, and the stepped section 13 are coaxial, and the diameter of the stepped section 13 is larger than that of the main shaft section 11.

[0033] See also Figures 1-6 A tooling for shaft heat treatment includes a load-bearing tray 100, a material-carrying tray 200, four corner supports 300, and a central support 400. The load-bearing tray 100 and the material-carrying tray 200 are connected as a whole by the four corner supports 300 and the central support 400. Figure 3 As shown, the load-bearing tray 100 is a rectangular tray, and the load-bearing tray 100 is provided with a first honeycomb mesh-like tie rod 110. For example... Figure 4 As shown, the material tray 200 is a rectangular tray. The material tray 200 is provided with a second honeycomb mesh-like tie rod 210. At least one second mesh intersection position 211 of the second honeycomb mesh-like tie rod 210 is provided with a mounting hole 2111. The mounting hole 2111 is used for the conical section 12 and the main shaft section 11 to pass through in sequence, so that the edge of the mounting hole 2111 supports the platform stage 13. One end of the top corner support 300 is connected to the top corner of the load-bearing tray 100, and the other end of the top corner support 300 is connected to the top corner of the material tray 200. One end of the center support 400 is connected to the center point of the load-bearing tray 100, and the other end of the center support 400 is connected to the center point of the material tray 200.

[0034] See Figure 1 The aforementioned tooling for shaft heat treatment includes a load-bearing tray 100 and a material-carrying tray 200. The load-bearing tray 100 supports the end face 14 of the shaft 10, and the main weight of the shaft 10 is supported on the load-bearing tray 100. The intersections of the first honeycomb mesh brace 110 support the end face 14 of the shaft 10. Simultaneously, the mounting holes 2111 of the upper material-carrying tray 200 limit the movement of the shaft 10. This tooling for shaft heat treatment supports and limits the shaft 10 at two locations, reducing shaft bending deformation after heat treatment, reducing the need for correction equipment, and thus improving the pass rate of shaft heat treatment. The connection between the corner support 300 and the material-carrying tray 200 and the load-bearing tray 100 near the corner can be detachable or fixed. Similarly, the connection between the center support 400 and the center point of the material-carrying tray 200 and the load-bearing tray 100 can be detachable or fixed. Detachable connections include, but are not limited to, slightly interference-fitting insertion.

[0035] In specific configuration, the tooling material is 4Cr25Ni35Mo, and it consists of a load-bearing tray 100, a material-carrying tray 200, four corner supports 300, and a central support 400. The load-bearing tray 100 and the material-carrying tray 200 are 20mm thick, and the tie rods are 8mm wide. The external dimensions of the tray are as follows: Figure 4 C1 and C2 are designed according to the internal space dimensions of the heat treatment furnace. The material tray 200 is provided with mounting holes 2111 at a certain interval for fixing the shaft 10. The spacing between the mounting holes 2111 should be such that it does not affect the heat treatment quality of the shaft 10.

[0036] Before heat treatment, the load-bearing tray 100, the material-carrying tray 200, the four corner supports 300, and the center support 400 are assembled into a whole. The shaft 10 to be heat treated is then arranged according to... Figure 1 The direction shown is placed inside the mounting hole 2111, and after being fixed, it is subjected to heat treatment.

[0037] In one embodiment, the grid intersections of the first honeycomb mesh rib 110 and the second honeycomb mesh rib 210 correspond one-to-one in the vertical direction. In another embodiment, at least one first grid intersection position 111 of the first honeycomb mesh rib 110 is used to support one end face 14 of the shaft member 10. This arrangement ensures that when the shaft member 10 passes through the mounting hole 2111 on the material loading tray 200, its end face 14 can rest on the grid intersection of the first honeycomb mesh rib 110 of the material loading tray 100, thereby supporting the shaft member 10.

[0038] In one embodiment, the distance between the load-bearing tray 100 and the material-carrying tray 200 is equal to the axial distance between the junction of the stage 13 and the main shaft section 11 and the end face 14 of the shaft 10 near the tapered section.

[0039] Preferably, in one embodiment, the first honeycomb mesh brace 110 is a hexagonal mesh structure.

[0040] Preferably, in one embodiment, the second honeycomb mesh brace 210 is a hexagonal mesh structure.

[0041] It should be noted that the first honeycomb mesh tie 110 and the second honeycomb mesh tie 210 can also be set as a pentagonal mesh structure or other forms of mesh structure, as long as they can provide the flow channels required by the treatment liquid during heat treatment and ensure that there is no mutual interference between the placed shafts 10.

[0042] In one embodiment, the load-bearing tray 100 has first support mounting holes 120 near its four corners, and the material-carrying tray 200 has third support mounting holes 220 near its four corners. One end of the corner support 300 is connected to the first support mounting hole 120, and the other end of the corner support 300 is connected to the third support mounting hole 220.

[0043] See Figure 3 and Figure 4 In one embodiment, the load-bearing tray 100 is provided with first corner reinforcing plates 130 near its four corners, and first support mounting holes 120 are formed in the first corner reinforcing plates 130. In this embodiment, the placement of the first corner reinforcing plates 130 at the corners of the load-bearing tray 100 makes the position of the first support mounting holes 120 more reliable, and the connection strength is higher when the corner support 300 is connected to the first support mounting holes 120. Similarly, the material-carrying tray 200 is provided with second corner reinforcing plates 230 near its four corners, and third support mounting holes 220 are formed in the second corner reinforcing plates 230. In this embodiment, the placement of the second corner reinforcing plates 230 at the corners of the material-carrying tray 200 makes the position of the third support mounting holes 220 more reliable, and the connection strength is higher when the corner support 300 is connected to the third support mounting holes 220.

[0044] In one embodiment, a second support mounting hole 140 is provided at the center point of the load-bearing tray 100; a fourth support mounting hole 240 is provided at the center point of the material-carrying tray 200, one end of the central support 400 is connected to the second support mounting hole 140, and the other end of the central support 400 is connected to the fourth support mounting hole 240.

[0045] In one embodiment, the top corner support 300 is provided with a first protruding ring 310, and the distance between the bottom of the first protruding ring 310 and the bottom end face of the top corner support 300 is equal to the thickness of the load-bearing material plate 100.

[0046] In one embodiment, the central support 400 is provided with a second protruding ring 410, and the distance between the bottom of the second protruding ring 410 and the bottom end face of the central support 400 is equal to the thickness of the load-bearing plate 100.

[0047] Tooling dimensions determined:

[0048] The inner diameter d' of mounting hole 2111 is determined based on the dimension d of the main shaft section 11 of shaft 10 and the dimension d2 of the stage section 13 of shaft 10. The calculation formula is: inner diameter d' of mounting hole 2111 = dimension d of main shaft section 11 + Δd, and 5mm ≤ Δd ≤ 7mm, and d' < d2 - 2*R.

[0049] The dimensions D1' and d1' of the support mounting holes on the material tray are determined based on the support dimensions D1 and d1. The calculation formula is: inner diameter of the support hole on the material tray = d1 + Δd1, and 4 mm ≤ Δd1 ≤ 6 mm.

[0050] The external dimensions C1 and C2 of the load-bearing tray 100 and the material-carrying tray 200 are designed according to the internal space dimensions of the heat treatment furnace.

[0051] The height h of the top corner support 300 and the center support 400 is determined according to the length L of the shaft 10.

[0052] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0054] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0055] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

Claims

1. A tooling for shaft heat treatment, for heat treatment of a shaft piece, the shaft piece comprising a main shaft section, a taper section arranged at one end of the main shaft section, and a table section arranged at the other end of the main shaft section, the main shaft section, the taper section and the table section being coaxial, and the table section having a larger diameter than the main shaft section, characterized in that: include The load-bearing tray is rectangular and is equipped with a first honeycomb mesh-like bracing. The material tray is a rectangular tray, and the material tray is provided with a second honeycomb grid-shaped tie. At least one second grid intersection of the second honeycomb grid tie is provided with a mounting hole. The mounting hole is used for the tapered section and the main shaft section to pass through in sequence, so that the edge of the mounting hole supports the stage. Four corner supports, one end of each corner support is connected to the load-bearing tray near the corner, and the other end of each corner support is connected to the material-carrying tray near the corner. The central support column is connected at one end to the center point of the load-bearing tray, and at the other end to the center point of the material-carrying tray.

2. The tooling for shaft heat treatment according to claim 1, characterized in that: The intersection points of the first honeycomb mesh tie and the second honeycomb mesh tie are one-to-one in the vertical direction.

3. The tooling for shaft heat treatment according to claim 2, characterized in that: At least one of the first grid intersections of the first honeycomb mesh brace is used to support one end face of the shaft.

4. The tooling for shaft heat treatment according to claim 1, characterized in that: The distance between the load-bearing tray and the material-carrying tray is equal to the axial distance between the junction of the stage and the main shaft section and the end face of the shaft near the tapered section.

5. The tooling for shaft heat treatment according to claim 1, characterized in that: The first honeycomb mesh brace has a hexagonal mesh structure.

6. The tooling for shaft heat treatment according to claim 1, characterized in that: The second honeycomb mesh brace has a hexagonal mesh structure.

7. A tooling for heat treatment of a shaft according to any one of claims 1-6, characterized in that: The load-bearing tray has first support mounting holes near its four corners, and the material-carrying tray has third support mounting holes near its four corners. One end of the corner support is connected to the first support mounting hole, and the other end of the corner support is connected to the third support mounting hole.

8. The tooling for shaft heat treatment according to claim 7, characterized in that: The load-bearing tray is provided with a first corner reinforcement plate near the four corners, and the first support mounting hole is opened in the first corner reinforcement plate; The material loading tray is provided with a second corner reinforcement plate near the four corners, and the third support mounting hole is opened in the second corner reinforcement plate.

9. A tooling for heat treatment of a shaft according to any one of claims 1-6, characterized in that: A second support mounting hole is provided at the center point of the load-bearing tray; a fourth support mounting hole is provided at the center point of the material-carrying tray, one end of the central support is connected to the second support mounting hole, and the other end of the central support is connected to the fourth support mounting hole.

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