Multifunctional clamp for gear heat treatment carburizing and quenching

Abstract

The invention discloses a gear heat treatment carburizing and quenching multifunctional clamp which comprises more than one clamping plate, one end of each clamping plate is hinged to a bottom plate, the other end of each clamping plate is a movable end, and after the clamping plates are closed, a closed isolation protection cavity is formed between the clamping plates; the gear heat treatment device comprises at least one clamping plate and more than one clamping mechanism, at least one clamping mechanism is mounted on each clamping plate, a gear to be subjected to heat treatment is clamped on the clamping plates through the clamping mechanisms to be subjected to heat treatment, and a continuously changing movable clamping surface is formed between the clamping mechanisms and the gear to be subjected to heat treatment. According to the gear heat treatment device, continuous rotation of gear heat treatment is achieved through opening and closing of the clamping plates, uniform carburizing and quenching are achieved, meanwhile, sealing wrapping can be completed through the clamp during transferring, no sealed transferring space is needed, sealing wrapping can be completed through the clamp, and the working efficiency is effectively improved.

Description

Technical Field

[0001] The invention relates to the field of gear processing, and in particular to a multifunctional fixture for gear heat treatment carburizing and quenching. Background Art

[0002] Gears are key components in mechanical transmission systems, and their performance directly affects the efficiency and reliability of the entire mechanical equipment. In order to improve the surface hardness, wear resistance and fatigue resistance of gears, a carburizing and quenching heat treatment process is usually used. The carburizing and quenching process mainly includes two independent processes: carburizing and quenching. The carburizing process diffuses carbon atoms to the surface of the gear under high temperature to form a hardened layer with a high carbon content; then, the quenching process transforms the carburized gear into a high-hardness martensitic structure through rapid cooling, while maintaining the toughness of the core of the gear.

[0003] At present, carburizing and quenching are two independent processes, usually carried out in different equipment and environments. This requires that the workpiece be transferred from the carburizing furnace to the quenching tank after carburizing is completed. During the transfer process, since the environmental conditions required for carburizing and quenching are completely different, a sealed transfer space must be used to maintain the carburizing atmosphere to prevent the workpiece from being exposed to the air during the transfer process, thereby avoiding oxidation and decarburization. The design of the sealed transfer space is complex and usually requires special sealing devices and transfer channels, which not only increases the cost and maintenance difficulty of the equipment, but also limits the flexibility and efficiency of the production line.

[0004] In addition, traditional fixtures usually use fixed clamping surfaces when clamping gears for heat treatment. This fixed clamping surface cannot be dynamically adjusted during carburizing and quenching, which makes it difficult to achieve uniform diffusion of carbon in the gear during carburizing, affecting the carburizing quality. At the same time, during the quenching process, the fixed clamping surface restricts the rotation of the gear, resulting in uneven cooling, which in turn affects the hardness and wear resistance of the gear. This design defect makes it difficult for traditional fixtures to meet the requirements of efficient and uniform carburizing and quenching, restricting the quality improvement of the gear heat treatment process and the improvement of production efficiency. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a multifunctional clamp for carburizing and quenching of gear heat treatment, which can realize uninterrupted rotation of the gear heat treatment through the opening and closing of the clamp, so that it can be evenly carburized and quenched. At the same time, this structure can use the clamp to complete the sealing and wrapping during transportation. It does not need to rely on a sealed transportation space, but can be completed with the help of the clamp itself, which can effectively solve the shortcomings of the prior art.

[0006] The present invention is realized by the following technical scheme: a multifunctional fixture for gear heat treatment carburizing and quenching, comprising:

[0007] One or more splints, one end of each of the one or more splints is hinged to a bottom plate, and the other end of each of the one or more splints is a movable end. When the one or more splints are closed, a closed isolation protection cavity is formed in the middle;

[0008] More than one clamping mechanism, each of the clamping plates is equipped with at least one clamping mechanism, the gear to be heat treated is clamped on the clamping plate by the clamping mechanism for heat treatment, and a constantly changing active clamping surface is formed between the clamping mechanism and the gear to be heat treated;

[0009] A driving mechanism is installed on each of the clamping plates. The driving mechanism is located on one side of the clamping mechanism. The driving mechanism is used to drive the circumferential rotation of the gear to be heat treated. The driving mechanism is linked to the opening and closing of the clamping plates. When the hinged ends of each clamping plate open and close relative to the bottom plate, the driving mechanism is in a continuous driving state.

[0010] A fixed extension rod, one end of which is fixedly installed on the bottom of the base plate, and a movable driving sleeve is mounted on the fixed extension rod. The movable driving sleeve and each clamping plate are hinged through a first driving connecting rod. When the movable driving sleeve reciprocates along the axial direction of the fixed extension rod, each clamping plate opens and closes relative to the base plate.

[0011] As a preferred technical solution, the driving mechanism includes:

[0012] A fixing plate, one end of which is fixedly arranged on the assembly cavity of the clamping plate, and a rack mounting groove is arranged on the fixing plate along the length direction of the fixing plate;

[0013] A driving rack, one side of which is meshed with the gear to be heat treated, and the other side of which is movably mounted in the rack mounting groove;

[0014] A second driving connecting rod, one end of which is hinged to the driving rack, and the other end of which is fixedly hinged to the base plate through a first hinge ear.

[0015] As a preferred technical solution, a second articulated ear is provided on the bottom outer side surface of each of the splints, a first fixed ring is provided on the top of the movable drive sleeve, a third articulated ear is provided on the first fixed ring corresponding to each second articulated ear, one end of the first drive connecting rod is articulated to the second articulated ear, and the other end thereof is articulated to the third articulated ear.

[0016] As a preferred technical solution, a second fixing ring is provided at the bottom of the movable driving sleeve, and a third fixing ring is provided at the bottom of the fixed extension rod. At least two symmetrically arranged cylinders are installed on the third fixing ring, and the piston rods of the cylinders are connected to the second fixing ring. The movable driving sleeve is driven by the cylinders to reciprocate along the length direction of the fixed extension rod.

[0017] As a preferred technical solution, a connecting ear is provided on the bottom surface of the third fixing ring for connecting with an external driving device.

[0018] As a preferred technical solution, the clamping mechanism includes:

[0019] A clamping plate, one end surface of which is fixedly mounted on the assembly cavity of the clamping plate, and the other end surface of which is provided with an adjusting slide groove;

[0020] Two adjusting slide blocks, both of which are slidably mounted in the adjusting slide grooves, and the adjusting slide blocks are provided with locking screws;

[0021] A clamping rod, each of which is fixedly mounted on the adjusting slide block;

[0022] The rotating sleeve is sleeved on each clamping rod, and the gear to be heat treated is sleeved on the outside of the two clamping rods and the rotating sleeve. The rotating sleeve is in rolling contact with the inner ring of the gear to be heat treated, and the fixed clamping of the gear is completed by adjusting the adjusting slider.

[0023] As a preferred technical solution, a center rod is further provided in the middle of the bottom plate, and an arc-shaped docking port is provided at the top movable end of each splint. After each splint is closed, the arc-shaped docking port docks with the center rod.

[0024] The beneficial effect of the present invention is that the splint of the present invention can realize the opening and closing action by means of an external drive. When the splint is in the open and closed state, it can drive the action of the driving mechanism, so that the gear to be heat treated is in a state of continuous reciprocating rotation, and a movable clamping surface is obtained. In this way, the entire carburizing and quenching process can be more uniform, and will not be affected by the clamping of the fixture, resulting in the situation where the clamping surface cannot be carburized and quenched. Therefore, it is only necessary to control the opening and closing action of each splint to realize the reciprocating drive of the gear to be heat treated, so that it can better complete carburizing and quenching.

[0025] After carburizing is completed, the present invention only needs to directly close the clamps to form a closed chamber in the middle of the clamp, so that the carburized gear can be sealed and transferred. This does not require the use of a sealed transfer channel and can be completed using the clamp itself, which greatly simplifies the structure and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0028] Figure 2 It is a schematic diagram of the splint of the present invention after closing;

[0029] Figure 3 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0030] Figure 4 It is a structural schematic diagram of a single splint of the present invention;

[0031] Figure 5 It is a structural schematic diagram of the clamping mechanism of the present invention;

[0032] Figure 6 It is a cross-sectional schematic diagram of the present invention;

[0033] Description of reference numerals:

[0034] 1. Clamping plate; 3. Bottom plate; 6. Clamping mechanism; 12. Fixed extension rod; 10. Movable drive sleeve; 7. First drive connecting rod; 17. Fixed plate; 16. Drive rack; 18. Second drive connecting rod; 19. First hinged ear; 15. Second hinged ear; 9. First fixed ring; 8. Third hinged ear; 11. Second fixed ring; 13. Third fixed ring; 20. Cylinder; 14. Connecting ear; 63. Clamping plate; 64. Adjusting slide groove; 65. Adjusting slider; 61. Locking screw; 66. Clamping rod; 62. Rotating sleeve; 2. Center rod; 4. Arc-shaped docking port; 5. Assembly cavity; 100. Gear to be heat treated. DETAILED DESCRIPTION

[0035] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0036] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0037] like Figure 1 and Figure 3 As shown, a multifunctional fixture for gear heat treatment carburizing and quenching of the present invention comprises four clamping plates 1, one end of each of the four clamping plates 1 is hinged on a bottom plate 3, and the other end of each clamping plate 1 is a movable end. When the four clamping plates 1 are closed, a closed isolation protection cavity is formed in the middle. In this embodiment, the cross-sectional shape of each clamping plate 1 is an arc, and a columnar structure is formed after closing, such as Figure 2 As shown, as long as the gear 100 to be heat-treated needs to be transferred, it is only necessary to close the four clamping plates 1 to form a closed isolation protection chamber, and the transfer channel is no longer needed;

[0038] It also includes a plurality of clamping mechanisms 6, each of the clamping plates 1 is equipped with at least one clamping mechanism 6. In this embodiment, each clamping plate 1 is provided with two clamping mechanisms 6, which can be increased or decreased according to actual conditions. The gear 100 to be heat-treated is clamped on the clamping plate 1 by the clamping mechanism 6 for heat treatment. A constantly changing active clamping surface is formed between the clamping mechanism 6 and the gear 100 to be heat-treated. Since the clamping surface is constantly changing, it is different from the traditional clamping method. After there is no fixed clamping surface, each position of the gear can be evenly carburized and quenched, and there is no need to change the clamping position.

[0039] It also includes a driving mechanism, which is installed on each of the clamping plates 1. The driving mechanism is located on one side of the clamping mechanism 6. The driving mechanism is used to drive the circumferential rotation of the gear 100 to be heat treated. The driving mechanism is linked to the opening and closing of the clamping plates 1. When the hinged end of each clamping plate 1 is opened and closed relative to the bottom plate 3, the driving mechanism is in a continuous driving state. The driving mechanism is used to close each clamping plate 1, and can also be used as a reciprocating opening and closing action of each clamping plate 1. It can be operated as needed;

[0040] It also includes a fixed extension rod 12, one end of which is fixedly installed at the bottom of the base plate 3. A movable driving sleeve 10 is mounted on the fixed extension rod 12. The movable driving sleeve 10 and each clamp plate 1 are hinged through a first driving connecting rod 7. When the movable driving sleeve 10 reciprocates along the axial direction of the fixed extension rod 12, each clamp plate 1 opens and closes relative to the base plate 3.

[0041] Among them, Figure 3 and Figure 4 As shown, the driving mechanism includes:

[0042] A fixing plate 17, one end of which is fixedly disposed on the assembly cavity 5 of the clamping plate 1, and a rack mounting groove is disposed on the fixing plate 17 along the length direction of the fixing plate 17;

[0043] A driving rack 16, one side of which is meshed with the gear 100 to be heat treated, and the other side of which is movably mounted in the rack mounting groove;

[0044] A second driving link 18 , one end of which is hinged to the driving rack 16 , and the other end of which is fixedly hinged to the base plate 3 via a first hinge ear 19 .

[0045] When the first driving link 7 is driven, each splint 1 can be pulled, and the opening and closing action of each splint 1 can pull the second driving link 18. Due to the action of the second driving link 18, the driving rack 16 can be pulled. Since the driving rack 16 can move linearly along the rack mounting groove, the linear motion of the driving rack 16 can drive the gear meshing with it. In this way, as long as the opening and closing action of each splint 1 is controlled, the gear 100 to be heat treated can be in a continuous active motion state, and there will be no fixed clamping point, thereby avoiding uneven carburizing and quenching caused by fixed clamping points.

[0046] Among them, Figure 1 , Figure 3 as well as Figure 6 As shown, a second hinged ear 15 is provided on the outer side surface of the bottom of each of the splints 1, a first fixed ring 9 is provided on the top of the movable drive sleeve 10, and a third hinged ear 8 is provided on the first fixed ring 9 corresponding to each second hinged ear 15, one end of the first drive connecting rod 7 is hinged to the second hinged ear 15, and the other end thereof is hinged to the third hinged ear 8, a second fixed ring 11 is provided at the bottom of the movable drive sleeve 10, a third fixed ring 13 is provided at the bottom of the fixed extension rod 12, and at least two symmetrically arranged cylinders 20 are installed on the third fixed ring 13, the piston rod of the cylinder 20 is connected to the second fixed ring 11, and the movable drive sleeve 10 is driven to reciprocate along the length direction of the fixed extension rod 12 by the cylinder 20. The cylinder 20 is always located in the external space, and only the clamping jaw part is located in the carburizing and quenching environment. Therefore, the materials used in the structure of the clamping jaw part are all high-temperature resistant materials. During processing, the cylinder 20 is extended and retracted to control each clamping plate 1 to be in an active state at all times, while being in contact with the carburizing and quenching environment, so that the carburizing and quenching action can be completed evenly.

[0047] Among them, Figure 1 As shown, a connecting ear 14 is provided on the bottom surface of the third fixing ring 13 for connecting with an external driving device. The external driving device drives the action of the entire clamping jaw, which can be a driving manipulator or the like.

[0048] like Figure 5 As shown, the clamping mechanism 6 includes:

[0049] A clamping plate 631, one end surface of which is fixedly mounted on the assembly cavity 5 of the clamping plate 1, and the other end surface of which is provided with an adjusting slide groove 64;

[0050] Two adjusting sliders 65, both of which are slidably mounted in the adjusting slots 64, and locking screws 61 are disposed on the adjusting sliders 65;

[0051] A clamping rod 66, wherein the clamping rod 66 is fixedly mounted on the adjusting slider 65;

[0052] The rotating sleeve 62 is sleeved on each clamping rod 66, and the gear 100 to be heat treated is sleeved on the outside of the two clamping rods 66 and the rotating sleeve 62. The rotating sleeve 62 is in rolling contact with the inner ring of the gear 100 to be heat treated, and the fixed clamping of the gear is completed by adjusting the adjusting slider 65;

[0053] When clamping the gear, first bring the two adjusting sliders 65 together, then insert the clamping rod 66 and the rotating sleeve 62 into the gear hole of the gear, then pull the two adjusting sliders 65 apart so that the rotating sleeve 62 is pressed against the gear hole, and then lock the locking screw 61 to position the adjusting slider 65 and complete the clamping. Since the contact part with the gear is the rotating sleeve 62, the gear can rotate in a circle along the rotating sleeve 62 when it rotates in a circle, and the position of the rotating sleeve 62 in the gear hole is constantly changing.

[0054] Among them, Figure 1 As shown, a central rod 2 is also provided in the middle of the bottom plate 3, and an arc-shaped docking port 4 is provided at the top movable end of each splint 1. After each splint 1 is closed, the arc-shaped docking port 4 docks with the central rod 2. After the entire structure is closed, the transfer can be completed, so that a closed space is formed inside. Figure 2 As shown, the transfer channel setting can be canceled at this time.

[0055] The beneficial effect of the present invention is that the splint 1 of the present invention can realize the opening and closing action by an external drive. When the splint 1 is in the open and closed state, it can drive the action of the driving mechanism, so that the gear 100 to be heat treated is in a state of continuous reciprocating rotation, and a movable clamping surface is obtained. In this way, the entire carburizing and quenching process can be more uniform, and will not be affected by the clamping of the fixture, resulting in the clamping surface being unable to be carburized and quenched. Therefore, it is only necessary to control the opening and closing action of each splint 1 to realize the reciprocating drive of the gear to be heat treated, so that it can better complete carburizing and quenching.

[0056] After carburizing is completed, the present invention only needs to directly close the clamps 1 to form a closed chamber in the middle of the clamp, so that the carburized gear can be sealed and transported. This does not require the use of a sealed transfer channel and can be accomplished using the clamp itself, which greatly simplifies the structure and improves work efficiency.

[0057] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope defined in the claims.

Claims

1. A multifunctional fixture for gear heat treatment carburizing and quenching, characterized in that: include: One or more splints (1), one end of each of the one or more splints (1) is hinged on a bottom plate (3), the other end of each of the one or more splints (1) is a movable end, and when the one or more splints (1) are closed, a closed isolation protection cavity is formed in the middle; More than one clamping mechanism (6), each of the clamping plates (1) is equipped with at least one clamping mechanism (6), the gear (100) to be heat treated is clamped on the clamping plate (1) through the clamping mechanism (6) for heat treatment, and a continuously changing movable clamping surface is formed between the clamping mechanism (6) and the gear (100) to be heat treated; A driving mechanism is installed on each of the clamping plates (1), and the driving mechanism is located on one side of the clamping mechanism (6). The driving mechanism is used to drive the circumferential rotation of the gear (100) to be heat treated. The driving mechanism is linked to the opening and closing of the clamping plates (1). When the hinged end of each clamping plate (1) opens and closes relative to the bottom plate (3), the driving mechanism is in a continuous driving state. A fixed extension rod (12) has one end fixedly mounted on the bottom of the base plate (3). A movable drive sleeve (10) is sleeved on the fixed extension rod (12). The movable drive sleeve (10) and each clamping plate (1) are hingedly connected via a first drive connecting rod (7). When the movable drive sleeve (10) reciprocates along the axial direction of the fixed extension rod (12), each clamping plate (1) opens and closes relative to the base plate (3).

2. The multifunctional fixture for gear heat treatment carburizing and quenching according to claim 1, characterized in that: The driving mechanism comprises: A fixing plate (17), one end of which is fixedly arranged on the assembly cavity (5) of the clamping plate (1), and a rack mounting groove is arranged on the fixing plate (17) along the length direction of the fixing plate (17); A driving rack (16), one side of the driving rack (16) is meshed with the gear (100) to be heat treated, and the other side of the driving rack (16) is movably mounted in the rack mounting groove; A second driving connecting rod (18), one end of which is hinged to the driving rack (16), and the other end of which is fixedly hinged to the base plate (3) via a first hinge ear (19).

3. The multifunctional fixture for gear heat treatment carburizing and quenching according to claim 1, characterized in that: A second hinged ear (15) is provided on the outer side surface of the bottom of each of the splints (1), a first fixed ring (9) is provided on the top of the movable drive sleeve (10), a third hinged ear (8) is provided on the first fixed ring (9) corresponding to each second hinged ear (15), one end of the first drive connecting rod (7) is hinged to the second hinged ear (15), and the other end thereof is hinged to the third hinged ear (8).

4. The multifunctional fixture for gear heat treatment carburizing and quenching according to claim 1, characterized in that: A second fixing ring (11) is arranged at the bottom of the movable driving sleeve (10), and a third fixing ring (13) is arranged at the bottom of the fixed extension rod (12). At least two symmetrically arranged cylinders (20) are mounted on the third fixing ring (13), and the piston rods of the cylinders (20) are connected to the second fixing ring (11), and the movable driving sleeve (10) is driven by the cylinders (20) to reciprocate along the length direction of the fixed extension rod (12).

5. The multifunctional fixture for gear heat treatment carburizing and quenching according to claim 4, characterized in that: A connecting ear (14) is provided on the bottom surface of the third fixing ring (13) for connecting to an external driving device.

6. The multifunctional fixture for gear heat treatment carburizing and quenching according to claim 1, characterized in that: The clamping mechanism (6) comprises: A clamping plate (63) (1), one end surface of the clamping plate (63) (1) is fixedly mounted on the assembly cavity (5) of the clamping plate (1), and the other end surface of the clamping plate (63) (1) is provided with an adjustment slide groove (64); Two adjusting slide blocks (65), both of which are slidably mounted in the adjusting slide groove (64), and a locking screw (61) is provided on the adjusting slide block (65); A clamping rod (66), wherein the clamping rod (66) is fixedly mounted on the adjusting slide block (65); The rotating sleeve (62) is sleeved on each clamping rod (66), and the gear (100) to be heat treated is sleeved on the outside of the two clamping rods (66) and the rotating sleeve (62). The rotating sleeve (62) is in rolling contact with the inner ring of the gear (100) to be heat treated, and the fixed clamping of the gear is completed by adjusting the adjusting slider (65).

7. The multifunctional fixture for gear heat treatment carburizing and quenching according to claim 1, characterized in that: A center rod (2) is also provided in the middle of the bottom plate (3), and an arc-shaped docking port (4) is provided at the top movable end of each clamping plate (1). After each clamping plate (1) is closed, the arc-shaped docking port (4) docks with the center rod (2).

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