Anti-deformation clamping fixture for heat treatment of metal parts

Abstract

The present application relates to the field of metal heat treatment fixture, disclose a kind of metal parts heat treatment anti-deformation clamping fixture.In the present application, including bidirectional threaded rod, the outer surface of the upper end of bidirectional threaded rod is engaged and connected with conical tube, the upper surface of conical tube is welded with receiving tube, the outer surface of the lower end of bidirectional threaded rod is engaged and connected with support frame, the inner surface of support frame is movably sleeved with clamping rod, the inner surface of support frame is movably inserted with latch, the latch is embedded and installed in the inner groove of the two sides of corresponding clamping rod by penetrating the inner surface of the two sides of support frame, the upper end of bidirectional threaded rod is engaged with conical tube, and the lower end is engaged with support frame, the assembly mode of cooperating with latch to lock clamping rod, so that the overall height of the clamp and the extension length of the clamping rod can be bidirectionally, independently and accurately fine-tuned.This kind of modular design allows quick adaptation to metal parts of different sizes and shapes, and provides rigid locking through the latch to prevent relative sliding between clamp components caused by thermal stress or vibration during heat treatment.

Description

Technical Field

[0001] This invention belongs to the field of metal heat treatment fixture technology, specifically a metal parts heat treatment anti-deformation clamping fixture. Background Technology

[0002] Metal parts heat treatment anti-deformation clamping fixture is a device used to clamp and fix workpieces during the heat treatment process of metal parts. Its core function is to adapt to parts of different sizes and shapes and maintain a stable clamping state in a high-temperature environment, thereby preventing the parts from deforming due to thermal stress or external force and ensuring the accuracy of the parts after heat treatment.

[0003] Existing heat treatment clamping devices typically suffer from insufficient adjustment flexibility, making it difficult to quickly adapt to diverse part specifications. Furthermore, they are susceptible to heat buildup during high-temperature operations, leading to deformation of the clamp itself due to thermal expansion or a decrease in clamping force. This can result in loosening of the clamped parts, uneven force distribution, or even slippage, ultimately causing a decrease in part machining accuracy or rendering the parts unusable. In addition, traditional clamps generally lack integrated active protection mechanisms, making it difficult to simultaneously resolve the contradiction between uniform heating of the parts and the stability of the clamping structure. This deficiency is particularly pronounced when handling parts with complex structures or high-precision requirements.

[0004] Existing clamping structures lack bidirectional independent adjustment and locking mechanisms, making it impossible to achieve precise adaptation in height and clamping range. Furthermore, they lack an effective anti-interference support system, resulting in difficulty maintaining the initial clamping posture under high temperature and vibration environments. Consequently, more expensive and resilient materials are required for clamping. Summary of the Invention

[0005] The purpose of this invention is to provide a metal parts heat treatment anti-deformation clamping fixture in order to solve the above-mentioned problems.

[0006] The technical solution adopted in this invention is as follows: A metal part heat treatment anti-deformation clamping fixture includes a bidirectional threaded rod, a tapered tube is engaged with the outer surface of the upper end of the bidirectional threaded rod, a force-bearing tube is welded to the upper surface of the tapered tube, a support frame is engaged with the outer surface of the lower end of the bidirectional threaded rod, a clamping rod is movably sleeved on the inner surface of the support frame, and a pin is movably inserted into the inner surface of the support frame. The pin penetrates the inner surfaces of both sides of the support frame and is embedded in the inner grooves of the inner surfaces of the corresponding clamping rods.

[0007] By adopting the above technical solution, the upper end of the bidirectional threaded rod engages with the tapered tube, and the lower end engages with the support frame. Combined with the pin-locking assembly method for the clamping rod, the overall height of the fixture and the extension length of the clamping rod can be precisely adjusted bidirectionally and independently. This modular design allows for rapid adaptation to metal parts of different sizes and shapes, and the pin provides rigid locking, effectively preventing relative slippage between fixture components due to thermal stress or vibration during heat treatment. This ensures initial clamping stability from the outset, laying the foundation for deformation prevention.

[0008] In a preferred embodiment, an air inlet is provided on the upper outer surface of the clamping rod, and a heat dissipation vent is provided on the lower outer surface of the clamping rod.

[0009] By adopting the above technical solution, the air inlet at the upper end of the clamping rod and the heat dissipation port below it create a forced circulation heat exchange airflow. The air inlet serves as the input end of the active cooling airflow, while the heat dissipation port can promptly discharge the heat carried by the cooling airflow after it flows through the inside of the clamping rod, thereby achieving continuous and active cooling of the clamping rod body and directly reducing the risk of the fixture itself heating up and deforming due to absorbing radiant heat from the parts.

[0010] In a preferred embodiment, an air blowing hole is provided on the outer surface of the lower end of the clamping rod, and a clamping block is provided on the lower surface of the clamping rod.

[0011] By adopting the above technical solution, an air blowing hole is provided at the lower end of the clamping rod and connected to the clamping block, so that the cooling airflow can directly act on the contact area between the clamping block and the metal part and its vicinity. This directional air blowing has dual benefits: first, it can disperse the high-temperature gas locally accumulated on the surface of the part, promoting uniform heat treatment around the part; second, it can focus on cooling the clamping block, which is the directly heated component, protecting the stability of the clamping component at the front end and preventing it from losing its clamping force due to overheating, softening, or deformation.

[0012] In a preferred embodiment, a connecting pipe is fixedly connected to the outer surface of the force-bearing pipe, and the other end of the connecting pipe is fixedly connected to the air inlet.

[0013] By adopting the above technical solution, the connecting pipe fixes the force-bearing pipe to the air inlet, establishing a stable and sealed cooling gas delivery path from the external air source to each independent clamping rod.

[0014] In a preferred embodiment, a fastening nut is engaged on the upper surface of the bidirectional threaded rod, the lower surface of the fastening nut is adapted to the inner wall of the tapered tube, and an aluminum sheet is provided on the lower outer surface of the fastening nut.

[0015] By adopting the above technical solution, a fastening nut adapted to the inner wall of the tapered tube is installed at the upper end of the bidirectional threaded rod, and an aluminum sheet is installed at its lower end, achieving ultimate locking and sealing of the tapered tube. Tightening the fastening nut eliminates all gaps between the bidirectional threaded rod and the tapered tube threaded pair, ensuring the rigidity of the upper structure. The aluminum sheet deforms under pressure, effectively filling microscopic unevenness, sealing the thread gaps, and preventing gas leakage from this point.

[0016] In a preferred embodiment, a sealing ring is provided on the upper outer surface of the bidirectional threaded rod, and the sealing ring is made of polytetrafluoroethylene (PTFE).

[0017] By adopting the above technical solution, a sealing ring made of polytetrafluoroethylene is set on the upper outer surface of the bidirectional threaded rod. Utilizing the excellent high temperature resistance, self-lubrication and chemical inertness of polytetrafluoroethylene, a reliable seal is provided at both the relative moving interface and the stationary interface between the tapered tube and the bidirectional threaded rod.

[0018] In a preferred embodiment, a retaining ring is engaged with the inner surface of the upper end of the bidirectional threaded rod, an outer sleeve is fixedly connected to the upper surface of the retaining ring, and an outer connecting pipe is fixedly connected to the upper surface of the outer sleeve.

[0019] By adopting the above technical solution, the retaining ring connects the outer cylinder and the outer connecting pipe to the upper end of the bidirectional threaded rod, providing a standardized and detachable interface for connection with an external cooling air pump or air source system. This design allows the overall air circuit of the fixture to be easily connected to the factory's existing cooling system, achieving modular integration. At the same time, the meshing connection of the retaining ring ensures the connection strength and sealing at the interface, avoiding the risk of the air supply line falling off due to vibration.

[0020] In a preferred embodiment, a reference plate is welded to the outer surface of the tapered tube, a sliding groove is provided on the outer side of the reference plate, and a protrusion is provided on the outer surface of the upper end of the clamping rod.

[0021] By adopting the above technical solution, a reference plate with a sliding groove is welded to the outer surface of the tapered tube, which cooperates with the protrusion at the upper end of the clamping rod to provide a reference for circumferential positioning and radial guidance for multiple clamping rods. This ensures that all clamping rods can move radially synchronously and smoothly along a predetermined trajectory, so that the clamping force is applied evenly and symmetrically to the metal parts, avoiding deformation of the parts due to uneven force on one side.

[0022] In a preferred embodiment, the outer surface of the reference plate is provided with a placement hole, and the outer surface of the reference plate corresponding to the placement hole is provided with a bolt.

[0023] By adopting the above technical solution, the reference plate is provided with placement holes and bolts, providing a second locking mechanism for the clamping rod in addition to the engagement of the protrusion and the slide. After the clamping rod is adjusted to the required position, tightening the bolts will firmly press it onto the reference plate, completely restricting its radial degree of freedom.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0025] 1. The meshing connection between the bidirectional threaded rod, the tapered tube, and the support frame forms a central support skeleton. During heat treatment, an external air pump delivers gas through channels within this central skeleton. The bidirectional threaded structure allows for independent and precise adjustment of the overall height and support point position of the fixture from both top and bottom directions, thus flexibly adapting to parts of different sizes. After adjustment, the clamping rod and support frame are rigidly locked together using pins, forming a stable support frame.

[0026] Second, the key node where the holding rod is movably connected to the support frame via a pin is far away from the air inlet. After the cooling airflow enters the air inlet through the connecting pipe, it will circulate in the internal flow channel of the holding rod. In the area far away from the clamping block, which is less affected by heat treatment, it provides remote support and heat dissipation assistance, making it convenient to carry out relevant supplementary treatment in different areas.

[0027] Third, this structure combines modular, adjustable mechanical assembly with an integrated cooling system. Users can quickly perform coarse adjustments by rotating the bidirectional threaded rod, and then use pins to quickly assemble and disassemble the clamping rod and achieve circumferential positioning. The clamping process is efficient and flexible, and it is also easy to add or remove fulcrum positions to ensure clamping stability. The modular design facilitates mass production and reduces manufacturing costs. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the components installed in the device of the present invention;

[0029] Figure 2 This is a disassembled schematic diagram of the air pump connection structure of the device in this invention;

[0030] Figure 3 This is a schematic diagram showing the installation position of the fastening nut in this invention;

[0031] Figure 4 This is a schematic diagram illustrating the connection effect of the clamping rod in this invention;

[0032] Figure 5 This is a schematic diagram of the air cavity inside the clamping rod in this invention.

[0033] The markings in the diagram are: 1. Double-threaded rod; 2. Tapered tube; 3. Force-bearing tube; 4. Support frame; 5. Clamping rod; 6. Pin; 7. Air inlet; 8. Heat dissipation vent; 9. Air blowing hole; 10. Connecting tube; 11. Fastening nut; 12. Sealing ring; 13. Fixing ring; 14. External sleeve; 15. External connecting tube; 16. Reference plate; 17. Protrusion; 18. Placement hole; 19. Bolt; 20. Clamping block. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, 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.

[0035] Example:

[0036] Reference Figure 1-5 A metal parts heat treatment anti-deformation clamping fixture includes a bidirectional threaded rod 1, a tapered tube 2 engaged with the outer surface of the upper end of the bidirectional threaded rod 1, a force-bearing tube 3 welded to the upper surface of the tapered tube 2, a support frame 4 engaged with the outer surface of the lower end of the bidirectional threaded rod 1, a clamping rod 5 movably sleeved on the inner surface of the support frame 4, and a pin 6 movably inserted into the inner surface of the support frame 4. The pin 6 penetrates the inner surfaces of both sides of the support frame 4 and is embedded in the inner grooves of the inner surfaces of the corresponding clamping rods 5.

[0037] The upper end of the bidirectional threaded rod 1 engages with the tapered tube 2, and the lower end engages with the support frame 4. Combined with the locking mechanism of the clamping rod 5 using the pin 6, this allows for bidirectional, independent, and precise fine-tuning of the overall height of the clamp and the extension length of the clamping rod 5. This modular design allows for rapid adaptation to metal parts of different sizes and shapes, and the rigid locking provided by the pin 6 effectively prevents relative slippage between clamp components due to thermal stress or vibration during heat treatment. This ensures initial clamping stability from the outset, laying the foundation for preventing deformation.

[0038] Reference Figure 1-5 An air inlet 7 is provided on the upper outer surface of the clamping rod 5, and a heat dissipation vent 8 is provided on the lower outer surface of the clamping rod 5 below the air inlet 7.

[0039] The clamping rod 5 has an air inlet 7 at the top and a heat dissipation port 8 below it. The clamping rod 5 creates a forced circulation heat exchange airflow. The air inlet 7 serves as the input end of the active cooling airflow, while the heat dissipation port 8 can promptly discharge the heat carried by the cooling airflow after it flows through the inside of the clamping rod 5, thereby achieving continuous and active cooling of the clamping rod 5 body and directly reducing the risk of the fixture overheating and deforming due to absorbing radiant heat from the parts.

[0040] Reference Figure 1-5 An air blowing hole 9 is provided on the outer surface of the lower end of the clamping rod 5, and a clamping block 20 is provided on the lower surface of the clamping rod 5.

[0041] An air blowing hole 9 is provided at the lower end of the clamping rod 5 and connected to the clamping block 20, so that the cooling airflow can directly act on the contact area between the clamping block 20 and the metal part and its vicinity. This directional air blowing has dual benefits: first, it can disperse the high-temperature gas locally accumulated on the surface of the part, promoting uniform heat treatment around the part; second, it can focus on cooling the clamping block 20, which is a directly heated component, protecting the stability of the clamping component at the front end and preventing it from losing its clamping force due to overheating, softening, or deformation.

[0042] Reference Figure 1-5 A connecting pipe 10 is fixedly connected to the outer surface of the force-bearing pipe 3, and the other end of the connecting pipe 10 is fixedly connected to the air inlet 7.

[0043] The connecting pipe 10 connects the force-bearing pipe 3 to the air inlet 7, establishing a stable and sealed cooling gas delivery path from the external air source to each independent clamping rod 5.

[0044] Reference Figure 1-5 The upper surface of the bidirectional threaded rod 1 is engaged with a fastening nut 11. The lower surface of the fastening nut 11 is adapted to the inner wall of the tapered tube 2. An aluminum sheet is provided on the lower outer surface of the fastening nut 11.

[0045] A fastening nut 11, which fits the inner wall of the tapered tube 2, is installed at the upper end of the double-threaded rod 1, and an aluminum sheet is installed at its lower end, achieving ultimate locking and sealing of the tapered tube 2. Tightening the fastening nut 11 eliminates all gaps between the threaded pair of the double-threaded rod 1 and the tapered tube 2, ensuring the rigidity of the upper structure. The aluminum sheet deforms under pressure, effectively filling microscopic unevenness, sealing the thread gaps, and preventing gas leakage from this point.

[0046] Reference Figure 1-5 A sealing ring 12 is provided on the outer surface of the upper end of the bidirectional threaded rod 1. The sealing ring 12 is made of polytetrafluoroethylene [PTFE].

[0047] A polytetrafluoroethylene (PTFE) sealing ring 12 is provided on the upper outer surface of the bidirectional threaded rod 1. Utilizing the excellent high temperature resistance, self-lubrication, and chemical inertness of PTFE, a reliable seal is provided at both the relative moving interface and the stationary interface between the tapered tube 2 and the bidirectional threaded rod 1.

[0048] Reference Figure 1-5 A retaining ring 13 is engaged with the inner surface of the upper end of the bidirectional threaded rod 1. An outer sleeve 14 is fixedly connected to the upper surface of the retaining ring 13. An outer connecting pipe 15 is fixedly connected to the upper surface of the outer sleeve 14.

[0049] The retaining ring 13 connects the outer cylinder 14 and the outer connecting pipe 15 to the upper end of the bidirectional threaded rod 1, providing a standardized, detachable interface for connection to an external cooling air pump or air source system. This design allows the overall air circuit of the fixture to be easily connected to the factory's existing cooling system, achieving modular integration. At the same time, the meshing connection of the retaining ring 13 ensures the connection strength and sealing at the interface, avoiding the risk of the air supply line falling off due to vibration.

[0050] Reference Figure 1-5 A reference plate 16 is welded to the outer surface of the tapered tube 2. A sliding groove is provided on the outer side of the reference plate 16. A protrusion 17 is provided on the upper outer surface of the clamping rod 5.

[0051] A reference plate 16 with a sliding groove is welded to the outer surface of the tapered tube 2. It cooperates with the protrusion 17 at the upper end of the clamping rod 5 to provide a reference for circumferential positioning and radial guidance for multiple clamping rods 5. This ensures that all clamping rods 5 can move radially synchronously and smoothly along a predetermined trajectory, so that the clamping force is applied evenly and symmetrically to the metal parts, avoiding deformation of the parts due to uneven force on one side.

[0052] Reference Figure 1-5 The reference plate 16 has a placement hole 18 on its outer surface, and a bolt 19 is provided on the outer surface of the reference plate 16 corresponding to the placement hole 18.

[0053] The reference plate 16 is provided with placement holes 18 and bolts 19, providing a second locking mechanism for the clamping rod 5 in addition to the engagement of the protrusion 17 and the slide groove. When the clamping rod 5 is adjusted to the required position, tightening the bolts 19 can firmly press it onto the reference plate 16, completely restricting its radial degree of freedom.

[0054] The implementation principle of the metal parts heat treatment anti-deformation clamping fixture of the present invention is as follows:

[0055] Installation procedure of the device: The main function of the fixture described in this invention is to weld the external connection unit to the force-bearing tube 3. The heat treatment method and the requirements of the scenario are different, and the external connection is adapted to different methods. This invention will not extend the description. The fixture uses a bidirectional threaded rod 1 as the basic support unit. Threaded grooves are set at both ends. The upper end is screwed into the tapered tube 2 and then fastened with a fastening nut 11. The lower end is screwed into the support frame 4 to find a suitable height so that the clamping rod 5 can be inserted and the pin 6 can be inserted to complete the fixation. The internal threaded groove above the force-bearing tube 3 is fitted by screwing in the fixing ring 13. The external connection tube 15 fixes the external air pump to blow air into the interior. The protrusion 17 at the upper end of the clamping rod 5 is inserted into the slide rail of the reference plate 16. The two sides of the clamping rod 5 are inserted into the placement hole 18 by bolts 19 and then matched with the tapered tube 2 for limit.

[0056] Operating mode of the device: The tapered tube 2 is equipped with a uniformly annular reference clamping plate 16 for fixing the independent clamping rod 5. One side of the clamping rod 20 contacts the metal part for clamping, while the side away from the clamping rod 20 is used for heat dissipation to maintain the stability of the clamp. An external air pump is connected and filled into the air inlet 7 through the connecting pipe 10. The air inlet 7 is divided into two airflows. One part blows heat energy to the surrounding area through the air blowing hole 9 and the clamping rod 20 at the front end. The other part circulates up and down at the rear end and then conducts heat out through the heat dissipation port 8. The overall clamping is easy to adjust and increases the clamping fulcrum. At the same time, the air blowing effectively dissipates heat, which greatly prevents the clamp from deforming due to heat accumulation. In this way, the clamp uses a material with similar quality to the heat-treated metal parts, and can effectively clamp without using a more expensive and more stable material.

[0057] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A metal parts heat treatment anti-deformation clamping fixture, comprising a bidirectional threaded rod (1), characterized in that: The upper outer surface of the bidirectional threaded rod (1) is engaged with a tapered tube (2), and a force-bearing tube (3) is welded to the upper surface of the tapered tube (2). The lower outer surface of the bidirectional threaded rod (1) is engaged with a support frame (4). A clamping rod (5) is movably sleeved on the inner surface of the support frame (4). A pin (6) is movably inserted into the inner surface of the support frame (4). The pin (6) penetrates the inner surfaces on both sides of the support frame (4) and is embedded in the inner grooves on both sides of the corresponding clamping rod (5).

2. The metal parts heat treatment anti-deformation clamping fixture according to claim 1, characterized in that: An air inlet (7) is provided on the upper outer surface of the clamping rod (5), and a heat dissipation port (8) is provided on the lower outer surface of the clamping rod (5) below the air inlet (7).

3. The metal parts heat treatment anti-deformation clamping fixture according to claim 1, characterized in that: An air blowing hole (9) is provided on the outer surface of the lower end of the clamping rod (5), and a clamping block (20) is provided on the lower surface of the clamping rod (5).

4. The metal parts heat treatment anti-deformation clamping fixture according to claim 1, characterized in that: The outer surface of the force-bearing tube (3) is fixedly connected to a connecting tube (10), and the outer surface of the other end of the connecting tube (10) is fixedly connected to the air inlet (7).

5. A metal parts heat treatment anti-deformation clamping fixture according to claim 1, characterized in that: The upper surface of the bidirectional threaded rod (1) is engaged with a fastening nut (11), the lower surface of the fastening nut (11) is adapted to the inner wall of the tapered tube (2), and an aluminum sheet is provided on the lower outer surface of the fastening nut (11).

6. The metal parts heat treatment anti-deformation clamping fixture according to claim 1, characterized in that: The bidirectional threaded rod (1) has a sealing ring (12) on its upper outer surface, and the sealing ring (12) is made of polytetrafluoroethylene (PTFE).

7. A metal parts heat treatment anti-deformation clamping fixture according to claim 1, characterized in that: The upper inner surface of the bidirectional threaded rod (1) is engaged with a fixing ring (13), the upper surface of the fixing ring (13) is fixedly connected with an outer sleeve (14), and the upper surface of the outer sleeve (14) is fixedly connected with an outer connecting pipe (15).

8. A metal parts heat treatment anti-deformation clamping fixture according to claim 1, characterized in that: The outer surface of the tapered tube (2) is welded with a reference plate (16), the reference plate (16) is provided with a sliding groove on the outer side, and the upper outer surface of the clamping rod (5) is provided with a protrusion (17).

9. A metal parts heat treatment anti-deformation clamping fixture according to claim 8, characterized in that: The reference plate (16) has a placement hole (18) on its outer surface, and a bolt (19) is provided on the outer surface of the reference plate (16) corresponding to the placement hole (18).

Images