Quenching die for thin-walled workpiece

Abstract

The utility model discloses a thin-wall part quenching die, which comprises a die frame and a pressing plate, the die frame is provided with twenty first outer rings, ten second outer rings and a third outer ring, the first outer rings, the second outer rings and the third outer ring are uniformly distributed on the circumference of the die frame, the pressing plate is of an annular structure, and the pressing plate is of an annular structure. The outer diameter of the pressing plate is the same as the outer diameter of the mold frame, and the inner diameter of the pressing plate is the same as the inner diameter of the spigot of the mold frame. According to the quenching die for the thin-wall part, the roundness, the taper and the buckling deformation of quenching of the part are controlled by arranging a plurality of outer rings, adjusting the supporting position and pressing the part by the die, and the deformation of the large annular thin-wall part in the quenching process can be effectively controlled, so that the roundness and the taper of addendum circles of inner and outer teeth are controlled within 0.5 mm, and the end face run-out is controlled within 0.5 mm; the grinding allowance of the tooth part after heating is reduced, the machining efficiency after heating is improved, and the grinding amount deviation is reduced.

Description

Technical Field

[0001] The utility model relates to the field of thin-walled part quenching die equipment, in particular to a thin-walled part quenching die. Background Art

[0002] In the manufacturing process of large annular thin-walled parts, quenching is a key heat treatment step, which can improve the hardness and wear resistance of the parts.

[0003] The patent document with the Chinese patent announcement number CN207002801U is authorized on February 18, 2018. It discloses a quenching die and quenching equipment. The application includes a first die, a die core and a demoulding piece. The first die and the die core are fixedly connected or integrally formed. The first die has a working surface for contacting a workpiece, the die core protrudes relative to the working surface, the first die has a through hole, and the demoulding piece can be slidably penetrated in the through hole and can protrude relative to the working surface. The quenching die can slide relative to the first die through the demoulding piece. When the demoulding piece protrudes relative to the working surface, the workpiece sleeved on the die core is ejected. The whole process is smooth, the workpiece is less worn during the entire installation and removal process, and the product quality after quenching is relatively high, and the overall use effect is better. The structure is compact, the design is reasonable, the practicability is strong, and the market application potential is huge. The quenching equipment includes a quenching die, which has all the functions of the quenching die.

[0004] It can be seen from the above application that the existing quenching process often causes deformations such as roundness, taper and end face runout of parts due to the generation of thermal stress and structural stress, which affects the accuracy and processing efficiency of parts. In order to control these deformations, special quenching dies and methods are required, and a thin-walled part quenching die is proposed. Utility Model Content

[0005] The utility model aims to provide a thin-walled part quenching die, which can effectively control the deformation of large annular thin-walled parts during quenching by arranging multiple outer rings, adjusting the support position and the way the die presses the parts, and adjusting the roundness, taper and warping deformation of the parts during quenching, so that the roundness and taper of the inner and outer tooth top circles are controlled within 0.5mm, the end face runout is controlled within 0.5mm, the post-heat grinding allowance of the tooth part is reduced, the post-heat processing efficiency is improved, and the grinding amount deviation is reduced.

[0006] In order to achieve the above-mentioned purpose, the main technical scheme adopted by the utility model is: a thin-walled part quenching mold, including: a mold frame and a pressure plate, the mold frame is provided with a first outer ring, a second outer ring and a third outer ring, the number of the first outer rings is provided with twenty pieces, the number of the second outer rings is provided with ten pieces, the first outer ring and the second outer ring only support the tooth tops of the inner teeth, the upper part of the third outer ring supports the inner diameter of the stop of the mold frame, the first outer ring, the second outer ring and the third outer ring are evenly distributed on the circumference of the mold frame, the pressure plate is a ring structure, the outer diameter of the pressure plate is the same as the outer diameter of the mold frame, and the inner diameter of the pressure plate is the same as the inner diameter of the stop of the mold frame.

[0007] Preferably, the length and tooth width of the first outer ring and the second outer ring are both mm, and the length of the third outer ring and the gear ring height are the same, both 250 mm.

[0008] Preferably, the first outer ring is provided with two oil passage grooves, and the second outer ring and the third outer ring are provided with no oil passage grooves.

[0009] Preferably, the middle portion of the pressing plate is a hollow structure.

[0010] Preferably, cooling holes are provided on the pressing plate.

[0011] Preferably, the cooling holes are distributed close to the first outer ring.

[0012] Preferably, the number of the cooling holes is at least eight.

[0013] Preferably, the cooling hole is connected to the oil groove.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The thin-walled part quenching die can effectively control the deformation of large annular thin-walled parts during quenching by setting multiple outer rings, adjusting the support position and the way the die presses the parts, so as to control the roundness, taper and warping deformation of the parts. The roundness and taper of the inner and outer tooth top circles are controlled within 0.5 mm, and the end face runout is controlled within 0.5 mm, thereby reducing the post-heat grinding allowance of the teeth, improving the post-heat processing efficiency, and reducing the grinding amount deviation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the front cross section of the thin-walled part quenching die of the utility model;

[0017] Figure 2 It is a schematic diagram of the main cross-section of the die frame in the thin-walled part quenching die of the utility model;

[0018] Figure 3It is a side cross-sectional schematic diagram of a die frame in a thin-walled part quenching die of the utility model;

[0019] Figure 4 It is a schematic front view of a pressure plate in a thin-walled part quenching die of the utility model.

[0020] In the figure: 100, mold frame; 101, first outer ring; 102, second outer ring; 103, third outer ring; 200, pressing plate; 201, cooling hole. DETAILED DESCRIPTION

[0021] 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 in 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.

[0022] See also Figure 1-Figure 4 A thin-walled part quenching die comprises: a die frame 100 and a pressing plate 200. The die frame 100 is provided with a first outer ring 101, a second outer ring 102 and a third outer ring 103. The number of the first outer rings 101 is 20, and the number of the second outer rings 102 is 10. The first outer rings 101 and the second outer rings 102 only support the tooth tops of the inner teeth. The upper part of the third outer ring 103 supports the inner diameter of the stop of the die frame 100. The first outer ring 101, the second outer ring 102 and the third outer ring 103 are evenly distributed on the circumference of the die frame 100. The pressing plate 200 is an annular structure. The outer diameter of the pressing plate 200 is the same as the outer diameter of the die frame 100, and the inner diameter of the pressing plate 200 is the same as the inner diameter of the die frame 100. The inner diameter size of the stopper of the frame 100 is the same, which can control the position and posture of the thin-walled parts during the quenching process. The length and tooth width of the first outer ring 101 and the second outer ring 102 are both 195mm, and the length of the third outer ring 103 is the same as the height of the gear ring, both of which are 250mm. The first outer ring 101 is provided with two oil grooves, and the second outer ring 102 and the third outer ring 103 have no oil grooves. The middle part of the pressure plate 200 is a hollow structure, and cooling holes 201 are opened on the pressure plate 200. The cooling holes 201 are distributed near the first outer ring 101. The number of cooling holes 201 is at least eight, and the cooling holes 201 are connected to the oil grooves for uniform cooling of thin-walled parts during quenching.

[0023] Structural principle:

[0024] like Figure 1-Figure 4As shown, a large annular thin-walled part is placed between the mold frame 100 and the pressure plate 200 and fixed on the outer ring. The corresponding outer ring is selected according to the specific size and shape of the thin-walled part to ensure the stability of the thin-walled part during the quenching process. The cooling system is restarted through the cooling hole 201 to evenly cool the thin-walled part. Water cooling or oil cooling is used. The most suitable cooling method is selected according to the characteristics of the quenching medium and the material of the thin-walled part. The thin-walled part is evenly cooled until the predetermined quenching temperature is reached. The cooling system is turned off to allow the thin-walled part to cool naturally to room temperature. Finally, the thin-walled part is removed for subsequent processing and inspection. The quenching mold and method of the present invention can significantly improve the heat treatment quality of large annular thin-walled parts, reduce the workload of subsequent processing, and improve production efficiency and economic benefits.

[0025] In summary, the thin-walled part quenching die, by setting multiple outer rings, adjusting the support position and the way the die presses the parts, controls the roundness, taper and warping deformation of the parts during quenching, and can effectively control the deformation of large annular thin-walled parts during the quenching process, so that the roundness and taper of the inner and outer tooth top circles are controlled within 0.5mm, and the end face runout is controlled within 0.5mm, thereby reducing the post-heat grinding allowance of the teeth, improving the post-heat processing efficiency, and reducing the grinding amount deviation.

[0026] Parts not involved in the present invention are the same as the prior art or can be implemented by the prior art. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A thin-walled part quenching die, characterized in that: include: A mold frame (100) and a pressure plate (200), wherein the mold frame (100) is provided with a first outer ring (101), a second outer ring (102) and a third outer ring (103), wherein the number of the first outer rings (101) is 20, and the number of the second outer rings (102) is 10, wherein the first outer ring (101) and the second outer ring (102) only support the tooth tops of the inner teeth, and the upper part of the third outer ring (103) supports the inner diameter of the stopper of the mold frame (100), wherein the first outer ring (101), the second outer ring (102) and the third outer ring (103) are evenly distributed on the circumference of the mold frame (100), and the pressure plate (200) is an annular structure, wherein the outer diameter of the pressure plate (200) is the same as the outer diameter of the mold frame (100), and the inner diameter of the pressure plate (200) is the same as the inner diameter of the stopper of the mold frame (100).

2. A thin-walled part quenching die according to claim 1, characterized in that: The length and tooth width of the first outer ring (101) and the second outer ring (102) are both 195 mm, and the length and gear ring height of the third outer ring (103) are both 250 mm.

3. A thin-walled part quenching die according to claim 1, characterized in that: The first outer ring (101) is provided with two oil passage grooves, while the second outer ring (102) and the third outer ring (103) are provided with no oil passage grooves.

4. A thin-walled part quenching die according to claim 3, characterized in that: The middle part of the pressing plate (200) is a hollow structure.

5. A thin-walled part quenching die according to claim 4, characterized in that: The pressing plate (200) is provided with a cooling hole (201).

6. A thin-walled part quenching die according to claim 5, characterized in that: The cooling holes (201) are distributed close to the first outer ring (101).

7. A thin-walled part quenching die according to claim 6, characterized in that: The number of the cooling holes (201) is at least eight.

8. A thin-walled part quenching die according to claim 7, characterized in that: The cooling hole (201) is connected to the oil groove.

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