A heat treatment apparatus for a construction machine component and a treatment method thereof

Abstract

This invention relates to the field of heat treatment technology for mechanical castings, specifically to a heat treatment equipment and method for engineering machinery parts. A motor-driven turntable is installed in the pretreatment chamber. A bearing-mounted sleeve is installed at the other end of the inner cavity of the pretreatment chamber. Four sets of positioning tubes are arranged in a circumferential array on the turntable. One end of the sleeve faces the turntable, and a rod is slidably inserted into the sleeve. A telescopic pressure plate is installed at the other end of the rod, and the telescopic pressure plate is sleeved on the positioning tube. The workpiece is clamped between the telescopic pressure plate and the turntable. The beneficial effects are: by setting up a pretreatment device before tempering, the quenching residue generated is fully centrifuged and separated through centrifugal rotation. Then, the heat is recovered from the tempering furnace to form high-temperature gas. Under the scouring of the high-temperature gas, not only can the surface quenching coolant be vaporized, but the workpiece is also preheated, achieving a thorough tempering process.

Description

Technical Field

[0001] This invention relates to the field of heat treatment technology for mechanical castings, specifically to a heat treatment equipment and method for engineering machinery parts. Background Technology

[0002] After casting, existing construction machinery requires quenching and tempering heat treatment processes to improve the performance of mechanical parts.

[0003] In existing processes, most require heating, quenching, cooling, and then tempering.

[0004] However, after quenching, impurities from the quenching liquid can easily remain on the workpiece, especially for workpieces with complex shapes or deep hole structures. The quenching residues that accumulate inside are extremely difficult to clean, and oxidation can occur during tempering, thus affecting the purity and performance of the workpiece. Summary of the Invention

[0005] The purpose of this invention is to provide a heat treatment equipment and method for engineering machinery parts, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A heat treatment device for engineering machinery parts, the heat treatment device comprising:

[0008] A tempering and heat preservation furnace, wherein the tempering and heat preservation furnace is connected to a pretreatment box via a gas pipe;

[0009] A pretreatment box is provided, which is equipped with a motor-driven turntable. The other end of the inner cavity of the pretreatment box is provided with a sleeve that is rotatably mounted with a bearing. The turntable is provided with four sets of positioning tubes arranged in a circumferential array. One end of the sleeve is directly opposite the turntable, and a rod is slidably inserted into the sleeve. The other end of the rod is provided with a telescopic pressure plate. The telescopic pressure plate is sleeved on the positioning tube, and the workpiece is clamped between the telescopic pressure plate and the turntable.

[0010] The heating assembly includes a fixed plate, on which a protective sleeve is provided to cover the turntable and the telescopic pressure plate. An air pipe is connected to the outside of the fixed plate, and a first air hole and a second air hole are respectively located on the inside and outside of the protective sleeve.

[0011] Preferably, the upper end of the pretreatment box is provided with a cover plate, and the upper end of the pretreatment box is provided with heat dissipation holes away from the fixed plate.

[0012] Preferably, the pretreatment box is provided with an air inlet, which is connected to the heat recovery component of the tempering and heat preservation furnace through an air pipe.

[0013] Preferably, the fixed disk is provided with a rotating groove, and one end of the turntable is provided with an annular rotating ring that is rotatably mounted on the rotating groove.

[0014] Preferably, the inner wall of the protective sleeve is provided with multiple sets of side grooves arranged in a circumferential array.

[0015] Preferably, the outer wall of the insertion rod is provided with a pair of side strips arranged in a circumferential array, and the insertion rod and the side strips are slidably inserted into the sleeve.

[0016] Preferably, one end of the positioning tube is connected to the second air hole, and the outer wall of the middle section of the positioning tube is provided with multiple sets of linearly distributed through holes.

[0017] Preferably, the positioning tube is slidably inserted into the telescopic pressure plate, and the positioning tube and the telescopic pressure plate are fastened together by a nut.

[0018] Preferably, a rotating block is provided at the other end of the sleeve, and the rotating block bearing is rotatably mounted on the inner wall of the pretreatment box.

[0019] A processing method based on the above-mentioned heat treatment equipment for engineering machinery parts, the processing method comprising:

[0020] Pretreatment involves placing the quenched and cooled workpiece in a pretreatment box, where the workpiece is clamped by the cooperation of a telescopic pressure plate and a turntable. Centrifugal dehydration is achieved by the rotation of a motor, and further drying is achieved by introducing high-temperature gas during dehydration and drying.

[0021] Tempering and heat preservation involves placing the preheated and dried workpiece in a tempering and heat preservation furnace to achieve tempering treatment.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] This invention sets up a pretreatment device before tempering, which uses centrifugal rotation to fully centrifuge and separate the residue generated during quenching. Then, the heat is recovered by the tempering furnace to form high-temperature gas. Under the scouring of the high-temperature gas, not only can the quenching coolant on the surface be vaporized, but the workpiece is also preheated, thus achieving a thorough tempering process. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a top view of the pretreatment box of the present invention;

[0026] Figure 3 This is a schematic diagram of the pretreatment box structure of the present invention;

[0027] Figure 4This is a three-dimensional structural diagram of the turntable and telescopic pressure plate assembly of the present invention;

[0028] Figure 5 This is a schematic diagram of the three-dimensional structure of the fixed disk of the present invention.

[0029] In the diagram: 1. Tempering and heat preservation furnace; 2. Pretreatment box; 3. Air inlet; 4. Motor; 5. Air pipe; 6. Cover plate; 7. Heat dissipation hole; 8. Fixed plate; 9. Turntable; 10. Protective sleeve; 11. Positioning tube; 12. Telescopic pressure plate; 13. Sleeve; 14. Rotating block; 15. Insert rod; 16. Rotary ring; 17. Through hole; 18. Nut; 19. Side strip; 20. First air hole; 21. Rotary groove; 22. Second air hole. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1 to 5 The present invention provides a technical solution:

[0032] Example 1:

[0033] A heat treatment device for engineering machinery parts, comprising a tempering and holding furnace 1, a pretreatment box 2, and a heating assembly.

[0034] The tempering and heat preservation furnace 1 is connected to the pretreatment box 2 through the gas pipe 5. The pretreatment box 2 is equipped with a turntable 9 driven by a motor 4. The other end of the inner cavity of the pretreatment box 2 is equipped with a sleeve 13 with a bearing for rotation. The turntable 9 is equipped with four sets of positioning tubes 11 arranged in a circumferential array. One end of the sleeve 13 is directly opposite the turntable 9, and a rod 15 is slidably inserted into the sleeve 13. The other end of the rod 15 is equipped with a telescopic pressure plate 12. The telescopic pressure plate 12 is sleeved on the positioning tube 11, and the workpiece is clamped between the telescopic pressure plate 12 and the turntable 9.

[0035] By setting the telescopic pressure plate 12 to be sleeved on the positioning tube 11, the workpiece is clamped and fixed. Then, driven by the motor 4, the workpiece is centrifugally rotated to clean the surface of the workpiece.

[0036] The heating assembly includes a fixed plate 8, on which a protective sleeve 10 is provided to cover the turntable 9 and the telescopic pressure plate 12. An air pipe 5 is connected to the outside of the fixed plate 8, and a first air hole 20 and a second air hole 22 are respectively located on the inner and outer sides of the protective sleeve 10.

[0037] By setting the first vent 20 and the second vent 22, the high-temperature airflow is guided into the pretreatment box 2 to preheat the workpiece and vaporize impurities on the surface of the workpiece, thereby improving the pretreatment quality.

[0038] Example 2:

[0039] Based on Example 1, a cover plate 6 is provided on the upper end of the pretreatment box 2, and a heat dissipation hole 7 is provided on the upper end of the pretreatment box 2 away from the fixed plate 8.

[0040] The cover plate 6 enables convenient installation and removal of workpieces, while the heat dissipation holes 7 allow the high-temperature airflow to be discharged, thus forming a continuous air intake.

[0041] The pretreatment box 2 is equipped with an air inlet 3, which is connected to the heat recovery component of the tempering and heat preservation furnace 1 through an air pipe 5.

[0042] By combining the air inlet 3 and the air pipe 5, the high-temperature airflow can be transported.

[0043] Example 3:

[0044] Based on embodiment 2, a rotating groove 21 is provided on the fixed disk 8, and a ring-shaped rotating ring 16 is rotatably mounted on the rotating groove 21 at one end of the turntable 9.

[0045] By setting the rotating ring 16 and the rotating groove 21 in coordination, the position of the turntable 9 is limited, preventing the turntable 9 from rotating off-center.

[0046] The inner wall of the protective sleeve 10 is provided with multiple sets of side grooves arranged in a circumferential array.

[0047] By combining the protective sleeve 10 and the first vent 20, the protective sleeve 10 is heated, thereby collecting the impurities ejected by centrifugation on the inner wall of the protective sleeve 10 and vaporizing them through heating.

[0048] Example 4:

[0049] Based on embodiment 3, the outer wall of the insertion rod 15 is provided with a pair of side strips 19 arranged in a circumferential array. The insertion rod 15 and the side strips 19 are slidably inserted into the sleeve 13. The other end of the sleeve 13 is provided with a rotating block 14. The rotating block 14 is rotatably mounted on the inner wall of the pretreatment box 2.

[0050] By setting the insertion rod 15 with side strip 19, the alignment and insertion between the insertion rod 15 and the sleeve 13 are ensured, forming a linkage structure.

[0051] Example 5:

[0052] Based on Example 4, one end of the positioning tube 11 is connected to the second air hole 22, and the outer wall of the middle section of the positioning tube 11 is provided with multiple sets of linearly distributed through holes 17. The positioning tube 11 is slidably inserted into the telescopic pressure plate 12, and the positioning tube 11 and the telescopic pressure plate 12 are fastened and pressed together by nuts 18.

[0053] By setting a positioning tube 11 with a through hole 17, high-temperature airflow is transported to the outside of the workpiece and acts directly on the workpiece through the through hole 17, thereby improving the preheating efficiency.

[0054] A treatment method based on the aforementioned heat treatment equipment for engineering machinery parts, the treatment method comprising:

[0055] Pretreatment involves placing the quenched and cooled workpiece in the pretreatment box 2, using the cooperation of the telescopic pressure plate 12 and the turntable 9 to clamp the workpiece, and using the rotation of the motor 4 to achieve centrifugal dehydration. While dehydrating and drying, high-temperature gas is introduced to achieve further drying.

[0056] Tempering and heat preservation: The preheated and dried workpiece is placed in tempering and heat preservation furnace 1 to achieve tempering treatment.

[0057] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat treatment equipment for engineering machinery parts, characterized in that: The heat treatment equipment includes: Tempering and heat preservation furnace (1), wherein the tempering and heat preservation furnace (1) is connected to the pretreatment box (2) through gas pipe (5); A pretreatment box (2) is provided with a turntable (9) driven by a motor (4). A sleeve (13) with a bearing is provided at the other end of the inner cavity of the pretreatment box (2). Four sets of positioning tubes (11) are arranged in a circular array on the turntable (9). One end of the sleeve (13) is facing the turntable (9), and a rod (15) is slidably inserted on the sleeve (13). A telescopic pressure plate (12) is provided at the other end of the rod (15). The telescopic pressure plate (12) is sleeved on the positioning tube (11), and the workpiece is clamped between the telescopic pressure plate (12) and the turntable (9). The heating assembly includes a fixed plate (8), on which a protective sleeve (10) is provided to cover the turntable (9) and the telescopic pressure plate (12). The fixed plate (8) is connected to an air pipe (5). The inner side of the fixed plate (8) is provided with a first air hole (20) and a second air hole (22) located on the inner and outer sides of the protective sleeve (10), respectively. One end of the positioning tube (11) is connected to the second air hole (22). The outer wall of the middle section of the positioning tube (11) is provided with multiple sets of linearly distributed through holes (17).

2. An engineering machine component heat treatment apparatus according to claim 1, characterised in that: The pretreatment box (2) is provided with a cover plate (6) at the upper end, and a heat dissipation hole (7) is provided at the upper end of the pretreatment box (2) away from the fixed plate (8).

3. An engineering machine component heat treatment apparatus according to claim 2, characterised in that: The pretreatment box (2) is provided with an air inlet (3), which is connected to the heat recovery component of the tempering and heat preservation furnace (1) through an air pipe (5).

4. The heat treatment equipment for engineering machinery parts according to claim 1, characterized in that: The fixed disk (8) is provided with a rotating groove (21), and one end of the turntable (9) is provided with a circular ring (16) that is rotatably mounted on the rotating groove (21).

5. An engineering implement accessory heat treatment apparatus according to claim 1, characterized by: The inner wall of the protective sleeve (10) is provided with multiple sets of side grooves arranged in a circumferential array.

6. The heat treatment equipment for engineering machinery parts according to claim 1, characterized in that: The outer wall of the insertion rod (15) is provided with a pair of side strips (19) arranged in a circumferential array, and the insertion rod (15) and the side strips (19) are slidably inserted into the sleeve (13).

7. An engineering machine component heat treatment apparatus according to claim 1, characterised in that: The positioning tube (11) is slidably inserted into the telescopic pressure plate (12), and the positioning tube (11) and the telescopic pressure plate (12) are fastened together by a nut (18).

8. A heat treatment equipment for engineering machinery parts according to claim 6, characterized in that: The other end of the sleeve (13) is provided with a rotating block (14), and the rotating block (14) is rotatably mounted on the inner wall of the pretreatment box (2).

9. A method of treatment according to any of claims 1-8, when carried out by the engineering component heat treatment apparatus. 5 The processing method includes: Pretreatment involves placing the quenched and cooled workpiece in a pretreatment box (2), using the cooperation of a telescopic pressure plate (12) and a turntable (9) to clamp the workpiece, and using the rotation of a motor (4) to achieve centrifugal dehydration. While dehydrating and drying, the workpiece is further dried by introducing high-temperature gas. Tempering and heat preservation: The preheated and dried workpiece is placed in a tempering and heat preservation furnace (1) to achieve tempering treatment.

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