Rotary supporting tool for induction quenching of shaft parts

Abstract

The utility model discloses a kind of rotating support tool for induction quenching of shaft parts, including driving seat, shaft body workpiece and tailstock, one end of the tailstock is inserted in the inside of the shaft body workpiece, the top of the driving seat is equipped with matrix, the top outer wall of the matrix is equipped with limit frame, the inner wall of the limit frame is covered with clamping capsule, the inside of the matrix is equipped with pressure chamber, one end of the shaft body workpiece is located in the inside of the pressure chamber, six equidistant distribution's connecting port are set on the top outer wall of the clamping capsule, the inner wall of the connecting port is fixedly connected with connecting pipe, the other end of the connecting pipe is fixedly connected with pressurizing mechanism. The rotating support tool for induction quenching of shaft parts disclosed in the utility model has the effect of being able to avoid leaving indentation on the surface of workpiece, reduce material consumption and production process, improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of induction hardening technology for parts, and in particular to a rotary support fixture for induction hardening of shaft parts. Background Technology

[0002] Shafts have advantages such as supporting transmission components, bearing loads, and transmitting torque, making them one of the most frequently encountered typical parts in machines and widely used. After production, shafts need to undergo induction hardening to improve their structural strength.

[0003] However, traditional rotary support tooling for induction hardening of shaft parts usually uses a chuck to hold the workpiece, which may leave clamping marks on the surface of the clamping section of the workpiece in the non-hardened area. This requires subsequent processing or the reservation of machining allowance, which not only increases material consumption but also introduces additional processing steps, which may lead to reduced production efficiency and increased production costs.

[0004] For example, traditionally, metal jaws are used to rigidly contact the workpiece surface. In order to overcome the huge torque during the quenching and rotation process, the clamping force required is extremely large. This will inevitably leave obvious clamping marks on the surface of the workpiece clamping section. These marks can range from being visible indentations to potentially becoming microcrack sources, posing a potential threat to the fatigue performance of the workpiece. Utility Model Content

[0005] This utility model discloses a rotary support fixture for induction hardening of shaft parts, which aims to solve the technical problem that traditional rotary support fixtures for induction hardening of shaft parts usually use chucks to hold the workpiece, which may leave clamping marks on the surface of the clamping section of the workpiece in the non-hardening area, requiring subsequent processing or reserving machining allowance. This not only increases material consumption, but also introduces additional processing steps, which may lead to reduced production efficiency and increased production costs.

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

[0007] A rotary support fixture for induction hardening of shaft parts includes a drive base, a shaft workpiece, and a center. One end of the center is inserted into the interior of the shaft workpiece. The top of the drive base is provided with a base, and the top outer wall of the base is provided with a limiting frame. The inner wall of the limiting frame is covered with a clamping bag. The interior of the base is provided with a pressure chamber. One end of the shaft workpiece is located inside the pressure chamber. The top outer wall of the clamping bag is provided with six equally spaced connection ports. A connecting pipe is fixedly connected to the inner wall of each connection port, and a pressurizing mechanism is fixedly connected to the other end of the connecting pipe.

[0008] By adopting the above technical solution, it is possible to avoid leaving indentations on the workpiece surface, reduce material consumption and production processes, and improve production efficiency. Specifically, the non-quenched area of ​​the shaft workpiece to be clamped is first inserted into the annular clamping bladder, and the other end of the workpiece is clamped with the tailstock center to complete the initial positioning. When the shaft workpiece is inserted into the inner hole of the flexible clamping bladder, the pressurizing mechanism is activated. This mechanism injects a pressure medium, such as compressed air or hydraulic oil, into the sealed clamping bladder through the connecting pipe. As the pressure medium is continuously injected, the clamping bladder, as an elastic body, begins to undergo uniform radial expansion. Since its inner ring surface wraps around the outer circle of the workpiece, and the outer ring surface is constrained by the rigid limiting frame, the expansion force can only act inward, thus uniformly wrapping and holding the workpiece surface in 360 degrees. After the quenching process is completed, the pressurizing mechanism reverses to discharge the pressure medium in the clamping bladder. The clamping bladder returns to its original shape under its own elastic action and separates from the workpiece. At this time, the processed workpiece can be easily removed without any clamping marks on the workpiece surface.

[0009] As a further embodiment of this utility model: the base is a cylindrical structure, and a support frame is provided on the outer circumference of the base. The support frame is an annular structure. The pressurizing mechanism includes six air storage cylinders, which are fixedly installed inside the support frame. The bottom outer wall of the support frame is provided with six equally spaced support frames. One side outer wall of the support frame is provided with an electric push rod. The movable end of the electric push rod is fixedly connected to a piston plate, and the piston plate is slidably connected to the inner wall of the air storage cylinder.

[0010] By adopting the above technical solution, the control system activates six electric push rods. The moving ends of the electric push rods advance forward, driving the piston plate fixed to them to slide forward in its corresponding air storage cylinder. The air pre-stored in the air storage cylinder is compressed, and the pressure increases. The compressed high-pressure air is simultaneously injected into the annular clamping bladder from six circumferentially distributed points through the connecting pipe. The high-pressure gas fills the clamping bladder, causing it to produce uniform radial expansion. Due to the external constraint by the rigid limiting frame, the expansion force is concentrated on the internal workpiece surface, thereby achieving workpiece clamping.

[0011] As a further embodiment of this utility model: the inner circumferential wall of the clamping bag is provided with a plurality of equidistant limiting blocks, and limiting grooves are provided on one side of the outer wall of the limiting block near the top and bottom positions. Two return springs are fixedly connected to the vertical section of one side of the outer wall of the limiting block, and a friction-enhancing plate is fixedly connected to one end of the return spring. The top and bottom of the friction-enhancing plate are respectively slidably connected to the inner walls of the two limiting grooves.

[0012] By adopting the above technical solution, the pressure inside the clamping bladder continues to rise, and the friction plate that contacts the workpiece generates a huge static friction force. This friction force is sufficient to overcome the torque generated during the workpiece rotation quenching process, thereby driving the workpiece to rotate smoothly without any relative slippage.

[0013] In summary, this application includes at least one of the following beneficial technical effects:

[0014] 1. Avoid leaving indentations on the workpiece surface. Unlike traditional grippers, the clamping method in this solution can avoid any form of clamping damage to the workpiece clamping section surface while ensuring effective torque transmission and reliable workpiece support. This eliminates the need for subsequent repair processes, simplifies the production process, reduces costs and increases efficiency, and improves product quality.

[0015] 2. Provides precise vertical guidance to prevent the support frame from tipping over. Traditional methods require multiple bolts to fix the support frame to the drive seat, which increases the cumbersome installation steps. The existing piston plate can move strictly along the axial direction of the air tank, avoiding the jamming and uneven wear between the piston and the cylinder wall caused by lateral force, and ensuring smooth and reliable pressurization.

[0016] Other features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a rotary support fixture for induction hardening of shaft parts proposed in this utility model.

[0018] Figure 2 This invention provides a cross-sectional view of a rotary support fixture for induction hardening of shaft-type parts and a schematic diagram of a pressure mechanism.

[0019] Figure 3 This is a schematic diagram of the clamping pouch structure of a rotary support tooling for induction hardening of shaft parts proposed in this utility model.

[0020] Figure 4 This is a schematic diagram of the limiting block structure of a rotary support fixture for induction hardening of shaft parts proposed in this utility model.

[0021] In the attached diagram: 1. Drive seat; 2. Shaft workpiece; 3. Center; 4. Support frame; 5. Support bracket; 6. Limiting rod; 7. Limiting frame; 8. Electric push rod; 9. Air tank; 10. Clamping bladder; 11. Connecting pipe; 12. Piston plate; 13. Base; 14. Motor; 15. Connecting port; 16. Limiting block; 17. Return spring; 18. Friction-enhancing plate; 19. Limiting groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figure 1 and Figure 3 A rotary support fixture for induction hardening of shaft parts includes a drive base 1, a shaft workpiece 2, and a tip 3. The tip 3 is characterized in that one end is inserted into the interior of the shaft workpiece 2. The drive base 1 has a base 13 at its top, a limiting frame 7 on the outer wall of the top of the base 13, and a clamping bladder 10 covering the inner wall of the limiting frame 7. The base 13 has a pressure chamber inside, and one end of the shaft workpiece 2 is located inside the pressure chamber. The clamping bladder 10 has six equally spaced connection ports 15 on its outer wall. A connecting pipe 11 is fixedly connected to the inner wall of each connection port 15, and a pressurizing mechanism is fixedly connected to the other end of the connecting pipe 11.

[0024] The clamping pouch 10 has a ring-shaped structure, which allows the clamping pouch 10 to evenly hold the workpiece, thereby avoiding micro-bending or deformation of the workpiece caused by uneven clamping force, and thus improving the quality of the product.

[0025] It should be noted that the flexible clamping pouch 10 can be made of polyurethane or synthetic rubber.

[0026] Specifically, the non-quenched area of ​​the shaft workpiece 2 to be clamped is inserted into the annular clamping bladder 10, and the other end of the workpiece is clamped by the tailstock center 3 to complete the initial positioning. When the shaft workpiece is inserted into the inner hole of the flexible clamping bladder 10, the pressurizing mechanism is activated. This mechanism injects a pressure medium, such as compressed air or hydraulic oil, into the sealed clamping bladder 10 through the connecting pipe 11. As the pressure medium is continuously injected, the clamping bladder 10, as an elastic body, begins to expand radially in a uniform manner. Since its inner ring surface wraps around the outer circle of the workpiece and the outer ring surface is constrained by the rigid limiting frame 7, the expansion force can only act inward, thus uniformly wrapping and holding the surface of the workpiece in 360 degrees. After the quenching process is completed, the pressurizing mechanism reverses to discharge the pressure medium in the clamping bladder 10. The clamping bladder 10 returns to its original shape under its own elastic action and separates from the workpiece. At this time, the processed workpiece can be easily removed without any clamping marks on the surface of the workpiece.

[0027] Reference Figure 1 and Figure 2In a preferred embodiment, the base 13 is a cylindrical structure, and a support frame 4 is provided on the outer circumference of the base 13. The support frame 4 is an annular structure. The pressurization mechanism includes six air storage cylinders 9, which are fixedly installed inside the support frame 4. The bottom outer wall of the support frame 4 is provided with six equally spaced support frames 5. One side outer wall of the support frame 5 is provided with an electric push rod 8. The movable end of the electric push rod 8 is fixedly connected to a piston plate 12, which is slidably connected to the inner wall of the air storage cylinder 9.

[0028] It should be noted that the other end of the connecting pipe 11 extends into the interior of the gas storage cylinder 9, and the other end of the connecting pipe 11 is connected to the interior of the gas storage cylinder 9.

[0029] Specifically, the control system activates six electric push rods 8. The movable ends of the electric push rods 8 move forward, driving the piston plate 12 fixed thereto to slide forward in its corresponding air storage cylinder 9. The air pre-stored in the air storage cylinder 9 is compressed, and the pressure increases. The compressed high-pressure air is simultaneously injected into the annular clamping bladder 10 from six circumferentially distributed points through the connecting pipe 11. The high-pressure gas fills the clamping bladder 10, causing it to produce uniform radial expansion. Due to the external constraint by the rigid limiting frame 7, the expansion force is concentrated on the internal workpiece surface, thereby achieving workpiece clamping.

[0030] Reference Figure 3 and Figure 4 In a preferred embodiment, the inner circumferential wall of the clamping bag 10 is provided with a plurality of equally spaced limiting blocks 16. Limiting grooves 19 are provided on one side of the outer wall of the limiting block 16 near the top and bottom positions. Two return springs 17 are fixedly connected to the vertical section of one side of the outer wall of the limiting block 16. One end of the return spring 17 is fixedly connected to a friction plate 18. The top and bottom of the friction plate 18 are slidably connected to the inner walls of the two limiting grooves 19, respectively.

[0031] The drive base 1 is equipped with a motor 14 inside, and the output shaft of the motor 14 is fixedly connected to the center of the bottom outer wall of the base 13.

[0032] It is particularly important to note that the friction plate 18 can be made of powder metallurgy sintered copper-based friction material, which can withstand long-term, high-intensity friction and wear.

[0033] Specifically, the pressure inside the clamping bladder 10 continues to rise, and the friction plate 18 that contacts the workpiece generates a huge static friction force. This friction force is sufficient to overcome the torque generated during the workpiece rotation quenching process, thereby driving the workpiece to rotate smoothly without any relative slippage.

[0034] Reference Figure 1 and Figure 3In a preferred embodiment, the top outer wall of the drive seat 1 is provided with an installation groove, and the bottom outer wall of the support frame 5 is provided with a limiting rod 6, the bottom end of which is slidably connected to the inner wall of the installation groove.

[0035] Specifically, the sliding fit between the limiting rod 6 and the mounting groove provides guidance for the piston plate 12 to move strictly along the axial direction of the gas storage cylinder 9, avoiding the jamming and uneven wear of the piston and cylinder wall caused by lateral force, and improving the stability of the equipment.

[0036] Working principle: In use, the non-quenched area of ​​the shaft workpiece 2 to be clamped is inserted into the annular clamping bladder 10, and the other end of the workpiece is clamped by the tailstock tip 3 to complete the initial positioning. When the shaft workpiece is inserted into the inner hole of the flexible clamping bladder 10, the pressurizing mechanism is activated. This mechanism injects a pressure medium, such as compressed air or hydraulic oil, into the sealed clamping bladder 10 through the connecting pipe 11. As the pressure medium is continuously injected, the clamping bladder 10, as an elastic body, begins to expand radially in a uniform manner. Since its inner ring surface wraps around the outer circle of the workpiece, and the outer ring surface is constrained by the rigid limiting frame 7, the expansion force can only act inward, thus uniformly wrapping and holding the surface of the workpiece in 360 degrees. After the quenching process is completed, the pressurizing mechanism reverses to discharge the pressure medium in the clamping bladder 10. The clamping bladder 10 returns to its original shape under its own elasticity and separates from the workpiece. At this time, the processed workpiece can be easily removed without any clamping marks on the surface of the workpiece.

[0037] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A rotary support fixture for induction hardening of shaft parts, comprising a drive seat (1), a shaft workpiece (2), and a center (3), characterized in that, One end of the tip (3) is inserted into the interior of the shaft workpiece (2). The top of the drive seat (1) is provided with a base (13). The top outer wall of the base (13) is provided with a limiting frame (7). The inner wall of the limiting frame (7) is covered with a clamping bag (10). The interior of the base (13) is provided with a pressure chamber. One end of the shaft workpiece (2) is located inside the pressure chamber. The top outer wall of the clamping bag (10) is provided with six equally spaced connection ports (15). The inner wall of the connection port (15) is fixedly connected with a connecting pipe (11). The other end of the connecting pipe (11) is fixedly connected with a pressurizing mechanism.

2. The rotary support fixture for induction hardening of shaft parts according to claim 1, characterized in that, The clamping pouch (10) has a ring-shaped structure.

3. The rotary support fixture for induction hardening of shaft parts according to claim 2, characterized in that, The base (13) is a cylindrical structure, and a support frame (4) is provided on the outer circumference of the base (13). The support frame (4) is an annular structure. The pressurizing mechanism includes six air storage cylinders (9). The air storage cylinders (9) are fixedly installed inside the support frame (4). The bottom outer wall of the support frame (4) is provided with six equally spaced support frames (5). One side outer wall of the support frame (5) is provided with an electric push rod (8). The movable end of the electric push rod (8) is fixedly connected to a piston plate (12). The piston plate (12) is slidably connected to the inner wall of the air storage cylinder (9).

4. The rotary support fixture for induction hardening of shaft parts according to claim 3, characterized in that, The other end of the connecting pipe (11) extends into the interior of the gas storage cylinder (9), and the other end of the connecting pipe (11) communicates with the interior of the gas storage cylinder (9).

5. A rotary support fixture for induction hardening of shaft parts according to claim 1, characterized in that, The inner circumferential wall of the clamping bag (10) is provided with a number of equally spaced limiting blocks (16). The outer wall of one side of the limiting block (16) is provided with limiting grooves (19) near the top and bottom positions. Two return springs (17) are fixedly connected to the vertical section of the outer wall of one side of the limiting block (16). One end of the return spring (17) is fixedly connected to a friction plate (18). The top and bottom of the friction plate (18) are slidably connected to the inner walls of the two limiting grooves (19).

6. A rotary support fixture for induction hardening of shaft parts according to claim 5, characterized in that, The drive base (1) is equipped with a motor (14), and the output shaft of the motor (14) is fixedly connected to the center of the bottom outer wall of the base (13).

7. A rotary support fixture for induction hardening of shaft parts according to claim 3, characterized in that, The top outer wall of the drive seat (1) is provided with an installation groove, and the bottom outer wall of the support frame (5) is provided with a limiting rod (6), the bottom end of which is slidably connected to the inner wall of the installation groove.

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