Intelligent heat treatment equipment for ultrathin saw blade

Abstract

This invention discloses an intelligent heat treatment device for ultra-thin saw blades, comprising a housing, an annular heater, an upper heat shield, and a lower heat shield. Multiple low-thermal-conductivity clamping blocks are elastically connected to the bottom of the upper heat shield and the top of the lower heat shield, respectively. A microporous heat-conducting ring is provided on the inner circumference of the annular heater, and a positioning platform is provided at the top center of the lower heat shield. The positioning platform is in contact with the air outside the housing through a heat-conducting seat. During heat treatment of the saw blade, the clamping blocks of the upper and lower heat shields are symmetrically arranged and elastically radially constrain the edges of the saw blade. During the cooling process, the clamping blocks guide the stress of the saw blade. Under the heat conduction of the annular heater, upper heat shield, lower heat shield, and positioning platform, the saw blade maintains a radial temperature difference with hotter edges and a cooler center during heat treatment. This invention can effectively reduce the probability of warping of ultra-thin saw blades during and after heat treatment.

Description

Technical Field

[0001] This invention relates to an intelligent heat treatment device for ultra-thin saw blades. Background Technology

[0002] To improve performance, ultra-thin saw blades typically have a significantly different shape between their edge tooth area and the base material, with a thickness generally ranging from 0.3 to 2.0 mm and a diameter of φ150 to φ450, resulting in a large diameter-to-thickness ratio. Consequently, they are prone to radial thermal expansion amplification during heat treatment, and even small temperature gradients can easily lead to warping of the ultra-thin saw blade. Even when using traditional heat treatment furnaces and operating under uniform temperature and temperature conditions, with clamps used to hold the saw blade in place, ultra-thin saw blades are still prone to warping, rebounding, and deformation after the clamps are released. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an intelligent heat treatment device that can reduce the probability of warping of ultra-thin saw blades during and after heat treatment.

[0004] The technical solution of this invention is: an intelligent heat treatment device for ultra-thin saw blades, comprising: a housing; An annular heater disposed within the housing; The upper heat shield and the lower heat shield are respectively raised and lowered inside the housing, and the upper heat shield and the lower heat shield are respectively coaxially arranged with the annular heater. The bottom of the upper heat shield and the top of the lower heat shield are respectively arrayed with multiple low thermal conductivity clamping blocks. Each clamping block is connected to the upper heat shield or the lower heat shield through an elastic element. Each clamping block is also provided with an arc-shaped protrusion on its opposite end face. The annular heater has a microporous heat-conducting ring on its inner circumference, and the heating element of the annular heater is disposed between the outer shell of the annular heater and the microporous heat-conducting ring. The lower heat shield is also provided with a positioning platform at the top center, and the positioning platform is in contact with the air outside the shell through a heat-conducting seat; During processing, the saw blade is placed on the positioning table. The clamping blocks of the upper and lower heat shields are symmetrically arranged and elastically radially constrain the edge of the saw blade. During the heat preservation stage of the saw blade, each clamping block maintains pressure on the edge of the saw blade. In the early stage of the saw blade cooling, each clamping block releases some pressure. In the later stage of the saw blade cooling, each clamping block applies pressure to the edge of the saw blade again, guiding the stress generated by the saw blade during the heat treatment process into a planar distribution. The saw blades on the outer periphery of each clamping block are exposed outside the upper and lower heat shields and are spaced apart from the microporous heat-conducting ring. The annular heater heats the saw blades by radiation. The upper and lower heat shields restrict the transfer of heat radiation to the central area of ​​the saw blade. The positioning table contacts the center of the saw blade and conducts some of the heat to the outside, so that the saw blade maintains a radial temperature difference of hotter edges and colder center during the heat treatment process.

[0005] Furthermore, the top of the positioning platform is provided with a positioning hole, and the bottom center of the upper heat shield is also provided with a positioning post. The positioning post and the positioning hole are respectively provided with corresponding positioning protrusions and positioning grooves.

[0006] Furthermore, each of the elastic elements is a U-shaped spring sheet, and the two ends of the elastic element are respectively connected to a clamping block and an upper heat shield or a lower heat shield.

[0007] Specifically, both the upper and lower heat shields are thin-walled structures with low heat capacity.

[0008] Furthermore, a gasket is fixed to the top of the upper heat shield and the bottom of the lower heat shield, respectively. The gasket is positioned corresponding to the position of each clamping block, and a heat insulation layer is provided between the gasket and the upper or lower heat shield.

[0009] Furthermore, the top of the housing is provided with a top plate, and a plurality of first cylinders are arrayed above the top plate. The piston rod of each first cylinder is connected to a gasket on the upper heat shield plate. The bottom of the housing is provided with an inlet and outlet port, and a bottom plate is provided above the inlet and outlet port. The bottom plate is connected to the gasket of the lower heat shield plate through a plurality of support columns. A second cylinder is also provided below the housing, and the piston rod of the second cylinder is connected to the bottom plate.

[0010] Specifically, the microporous heat-conducting ring is a porous sintered metal ring, and a cast iron ring is also provided on the inner circumference of the microporous heat-conducting ring.

[0011] Furthermore, the upper and lower ends of the cast iron ring are respectively fixed to the inner circumference of the annular heater by ceramic cover rings, and the annular heater is also provided with a heat reflective layer corresponding to the heating element.

[0012] Specifically, the clamping block and the arc-shaped protrusion are integrally formed ceramic structures.

[0013] Furthermore, it also includes a base, the housing is fixed above the base by multiple support legs, the second cylinder is fixed at the bottom of the base, a guide rod is connected between the base plate and the base, heat insulation pads are provided at the top of the base plate and the bottom of the top plate, and the housing and the outer shell of the annular heater are both hollow shells filled with a heat insulation layer.

[0014] The beneficial effects of this invention are as follows: Addressing the significant structural differences and varying heat capacities between the toothed and substrate areas of ultra-thin saw blades, this invention employs a ring heater combined with a microporous heat-conducting ring and a heat shield structure. This achieves zoned heating of the saw blade, maintaining a stable radial temperature difference between the hotter edges and the cooler center during heat treatment, thus preventing excessive internal stress. Simultaneously, each clamping block provides elastic radial constraint on the saw blade edges during heat treatment, allowing the saw blade to slowly release stress without warping. Furthermore, because each clamping block is made of a low thermal conductivity material, its small contact area with the saw blade edges via arc-shaped protrusions prevents thermal bridging. Finally, during the cooling stage, each clamping block provides gravitational guidance, ultimately enabling the saw blade to undergo microstructural transformation under controlled deformation conditions, thereby effectively reducing the probability of saw blade warping and residual stress. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the present invention; Figure 2 yes Figure 1 Enlarged view of section A in the middle; Figure 3 This is a schematic diagram of the structure of the lower heat shield in this invention; Figure 4 This is a schematic diagram of the upper heat shield in this invention; Figure 5 This is a schematic diagram of the gasket ring in this invention; Figure 6 This is a schematic diagram of the structure of the microporous heat-conducting ring and the cast iron ring in this invention; Figure 7 This is a top view of the present invention.

[0016] In the diagram: 1. Shell; 2. Ring heater; 3. Upper heat shield; 4. Lower heat shield; 5. Clamping block; 6. Elastic element; 7. Arc-shaped protrusion; 8. Microporous heat-conducting ring; 9. Positioning platform; 10. Heat-conducting seat; 11. Saw blade; 12. Positioning hole; 13. Positioning post; 14. Gasket ring; 15. Heat insulation layer; 16. Top plate; 17. First cylinder; 18. Bottom plate; 19. Support post; 20. Second cylinder; 21. Cast iron ring; 22. Ceramic cover ring; 23. Heat reflective layer; 24. Base; 25. Support leg; 26. Guide rod; 27. Heat insulation pad; 28. Thermal insulation layer. Detailed Implementation

[0017] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0018] Combination Figure 1-7 As shown, an intelligent heat treatment device for ultra-thin saw blades includes: a housing 1; An annular heater 2 is disposed inside the housing 1; The upper heat shield 3 and the lower heat shield 4 are respectively connected to the upper and lower parts of the housing 1. The upper heat shield 3 and the lower heat shield 4 are respectively coaxially arranged with the annular heater 2. The bottom of the upper heat shield 3 and the top of the lower heat shield 4 are respectively arrayed with a plurality of low thermal conductivity clamping blocks 5. Each clamping block 5 is connected to the upper heat shield 3 or the lower heat shield 4 through an elastic member 6. Each clamping block 5 is also provided with an arc-shaped protrusion 7 on the opposite end face. The annular heater 2 has a microporous heat-conducting ring 8 on its inner circumference, and the heating element of the annular heater 2 is disposed between the outer shell of the annular heater 2 and the microporous heat-conducting ring 8. The lower heat shield 4 is also provided with a positioning platform 9 at the top center position. The positioning platform 9 is in contact with the outside air of the shell 1 through the heat conduction seat 10. During processing, the saw blade 11 is placed on the positioning table 9. The clamping blocks 5 of the upper heat shield 3 and the lower heat shield 4 are symmetrically arranged and elastically radially constrain the edge of the saw blade 11. During the heat preservation stage of the saw blade 11, each clamping block 5 maintains pressure on the edge of the saw blade 11. In the early stage of cooling of the saw blade 11, each clamping block 5 releases some pressure. In the later stage of cooling of the saw blade 11, each clamping block 5 applies pressure to the edge of the saw blade 11 again, so as to guide the stress generated by the saw blade 11 during the heat treatment process into a planar distribution, so as to prevent the saw blade 11 from warping. The saw blade 11 on the outer periphery of each clamping block 5 is exposed to the outside of the upper heat shield 3 and the lower heat shield 4 and is kept at a distance from the microporous heat-conducting ring 8. The annular heater 2 heats the saw blade 11 by radiation. The microporous heat-conducting ring 8 is used to absorb and slowly release heat, thereby reducing the transient heating or cooling rate of the outer edge of the saw blade 11. The upper heat shield 3 and the lower heat shield 4 are used to limit the transfer of heat radiation to the central area of ​​the saw blade 11. The positioning table 9 contacts the center of the saw blade 11 and conducts some of the heat to the outside, so that the saw blade 11 maintains a stable radial temperature difference with the edge being hotter and the center being colder during the heat treatment process. In the above structure, considering the significant structural differences and varying heat capacities between the toothed and substrate areas of the ultra-thin saw blade 11, a ring heater 2 is used in conjunction with a microporous heat-conducting ring 8 and a heat shield structure. This allows the saw blade 11 to achieve zoned heating, maintaining a stable radial temperature difference between the hotter edges and the cooler center during heat treatment, thus preventing excessive internal stress during the heat treatment process. Simultaneously, each clamping block 5 provides elastic radial constraint on the edges of the saw blade 11 during heat treatment, allowing the saw blade 11 to slowly release stress without warping. Furthermore, since each clamping block 5 is made of a low thermal conductivity material, the arc-shaped protrusions 7 contact the edges of the saw blade 11, preventing thermal bridging. Finally, during the cooling stage of the saw blade 11, each clamping block 5 also provides gravitational guidance, ultimately enabling the saw blade 11 to complete its structural transformation under controlled deformation conditions, thereby effectively reducing the probability of warping and residual stress in the saw blade 11.

[0019] In another embodiment, combined Figure 1 , Figure 3 and Figure 4 As shown, the top of the positioning platform 9 is provided with a positioning hole 12, and the bottom center of the upper heat shield 3 is also provided with a positioning post 13. The positioning post 13 and the positioning hole 12 are respectively provided with corresponding positioning protrusions and positioning grooves to ensure that the clamping blocks 5 of the upper heat shield 3 and the lower heat shield 4 are symmetrically distributed.

[0020] In another embodiment, combined Figure 1 and Figure 2 As shown, each of the elastic elements 6 is a U-shaped spring sheet. The two ends of the elastic element 6 are respectively connected to the clamping block 5 and the upper heat shield 3 or the lower heat shield 4. This structure can also delay the heat conduction between the heat shield and the clamping block 5.

[0021] In another embodiment, both the upper heat shield 3 and the lower heat shield 4 are low heat capacity thin-walled structures. Specifically, both the upper heat shield 3 and the lower heat shield 4 are bright stainless steel sheets with a certain heat reflection capability and a low heat storage capacity to improve the heat shielding effect.

[0022] In another embodiment, combined Figure 1 and Figure 2 As shown, a gasket 14 is fixed to the top of the upper heat shield 3 and the bottom of the lower heat shield 4 respectively. The gasket 14 is set to correspond to the position of each clamping block 5. A heat insulation layer 15 is also provided between the gasket 14 and the upper heat shield 3 or the lower heat shield 4 to ensure the reliability of the fixation of each clamping block 5.

[0023] In another embodiment, combined Figure 1 , Figure 5 and Figure 7 As shown, the top of the housing 1 is provided with a top plate 16, and a plurality of first cylinders 17 are arrayed above the top plate 16. The piston rod of each first cylinder 17 is connected to the gasket 14 on the upper heat shield 3 to drive the upper heat shield 3 to rise and fall, thereby realizing the change of pressure of the clamping block 5 during the heat preservation and cooling stages of the saw blade 11. The bottom of the housing 1 is provided with an inlet and outlet port, and a bottom plate 18 is provided on the inlet and outlet port. The bottom plate 18 is connected to the gasket 14 of the lower heat shield 4 through a plurality of support columns 19. A second cylinder 20 is also provided below the housing 1. The piston rod of the second cylinder 20 is connected to the bottom plate 18 to realize the rise and fall of the bottom plate 18, thereby loading and unloading the saw blade 11.

[0024] In another embodiment, combined Figure 1 , Figure 2 and Figure 6As shown, the microporous heat-conducting ring 8 is a porous sintered metal ring, and a cast iron ring 21 is also provided on the inner circumference of the microporous heat-conducting ring 8 to further improve the delayed heating capacity and heat storage capacity of the ring heater 2 and prevent heat from instantly penetrating into the saw blade 11.

[0025] In another embodiment, such as Figure 2 As shown, the upper and lower ends of the cast iron ring 21 are fixed to the inner circumference of the annular heater 2 by ceramic cover ring 22. The annular heater 2 is also provided with a heat reflection layer 23 corresponding to the heating element, so that the heat radiation is more concentrated and directed to the edge of the saw blade 11.

[0026] In another embodiment, the clamping block 5 and the arc-shaped protrusion 7 are integrally formed ceramic structures, which have high strength and low thermal conductivity.

[0027] In another embodiment, such as Figure 1 As shown, it also includes a base 24. The housing 1 is fixed above the base 24 by multiple support legs 25. The second cylinder 20 is fixed at the bottom of the base 24. A guide rod 26 is also connected between the base plate 18 and the base 24. The top of the base plate 18 and the bottom of the top plate 16 are respectively provided with heat insulation pads 27. The outer shells of the housing 1 and the annular heater 2 are both hollow shells and filled with a heat insulation layer 28.

Claims

1. An intelligent heat treatment device for ultra-thin saw blades, characterized in that, include: Shell (1); An annular heater (2) is disposed inside the housing (1); The upper heat shield (3) and the lower heat shield (4) are respectively connected to the upper and lower parts of the housing (1), and the upper heat shield (3) and the lower heat shield (4) are respectively coaxially arranged with the annular heater (2); The bottom of the upper heat shield (3) and the top of the lower heat shield (4) are respectively arrayed with multiple low thermal conductivity clamping blocks (5). Each clamping block (5) is connected to the upper heat shield (3) or the lower heat shield (4) through an elastic element (6). Each clamping block (5) is also provided with an arc-shaped protrusion (7) on the opposite end face of each clamping block (5). The inner circumference of the annular heater (2) is provided with a microporous heat-conducting ring (8), and the heating element of the annular heater (2) is disposed between the outer shell of the annular heater (2) and the microporous heat-conducting ring (8); The lower heat shield (4) is also provided with a positioning platform (9) at the top center position. The positioning platform (9) is in contact with the outside air of the shell (1) through the heat conduction seat (10). During processing, the saw blade (11) is placed on the positioning table (9). The clamping blocks (5) of the upper heat shield (3) and the lower heat shield (4) are symmetrically arranged and elastically radially constrain the edge of the saw blade (11). During the heat preservation stage of the saw blade (11), each clamping block (5) maintains pressure on the edge of the saw blade (11). In the early stage of cooling of the saw blade (11), each clamping block (5) releases some pressure. In the later stage of cooling of the saw blade (11), each clamping block (5) applies pressure to the edge of the saw blade (11) again, so as to guide the stress generated by the saw blade (11) during the heat treatment process into a planar distribution. The saw blade (11) on the outer periphery of each clamping block (5) is exposed to the outside of the upper heat shield (3) and the lower heat shield (4) and is kept at a distance from the microporous heat-conducting ring (8). The ring heater (2) heats the saw blade (11) by radiation. The upper heat shield (3) and the lower heat shield (4) restrict the transmission of heat radiation to the central area of ​​the saw blade (11). The positioning table (9) contacts the center of the saw blade (11) and conducts some of the heat to the outside, so that the saw blade (11) maintains a radial temperature difference with the edges being hotter and the center being colder during the heat treatment process.

2. The intelligent heat treatment equipment for ultra-thin saw blades as described in claim 1, characterized in that, The positioning platform (9) is provided with a positioning hole (12) at the top, and the bottom center of the upper heat shield (3) is also provided with a positioning post (13). The positioning post (13) and the positioning hole (12) are respectively provided with corresponding positioning protrusions and positioning grooves.

3. The intelligent heat treatment equipment for ultra-thin saw blades as described in claim 2, characterized in that, Each of the elastic elements (6) is a U-shaped spring sheet, and the two ends of the elastic element (6) are respectively connected to the clamping block (5) and the upper heat shield (3) or the lower heat shield (4).

4. The intelligent heat treatment equipment for ultra-thin saw blades as described in claim 3, characterized in that, Both the upper heat shield (3) and the lower heat shield (4) are low heat capacity thin-walled structures.

5. The intelligent heat treatment equipment for ultra-thin saw blades as described in claim 4, characterized in that, A gasket (14) is fixed to the top of the upper heat shield (3) and the bottom of the lower heat shield (4). The gasket (14) is set in accordance with the position of each clamping block (5). A heat insulation layer (15) is also provided between the gasket (14) and the upper heat shield (3) or the lower heat shield (4).

6. The intelligent heat treatment equipment for ultra-thin saw blades as described in claim 5, characterized in that, The top of the housing (1) is provided with a top plate (16), and a plurality of first cylinders (17) are arranged above the top plate (16). The piston rod of each first cylinder (17) is connected to the gasket (14) on the upper heat shield (3). The bottom of the housing (1) is provided with an inlet and outlet, and a bottom plate (18) is provided on the inlet and outlet. The bottom plate (18) is connected to the gasket (14) of the lower heat shield (4) through a plurality of support columns (19). A second cylinder (20) is also provided below the housing (1), and the piston rod of the second cylinder (20) is connected to the bottom plate (18).

7. The intelligent heat treatment equipment for ultra-thin saw blades as described in claim 6, characterized in that, The microporous heat-conducting ring (8) is a porous sintered metal ring, and a cast iron ring (21) is also provided on the inner circumference of the microporous heat-conducting ring (8).

8. The intelligent heat treatment equipment for ultra-thin saw blades as described in claim 7, characterized in that, The upper and lower ends of the cast iron ring (21) are fixed to the inner circumference of the annular heater (2) by ceramic cover rings (22), and the annular heater (2) is also provided with a heat reflective layer (23) corresponding to the heating element.

9. The intelligent heat treatment equipment for ultra-thin saw blades as described in claim 8, characterized in that, The clamping block (5) and the arc-shaped protrusion (7) are integrally formed ceramic structures.

10. The intelligent heat treatment equipment for ultra-thin saw blades as described in claim 9, characterized in that, It also includes a base (24), the housing (1) is fixed above the base (24) by multiple support legs (25), the second cylinder (20) is fixed at the bottom of the base (24), a guide rod (26) is connected between the base plate (18) and the base (24), the top of the base plate (18) and the bottom of the top plate (16) are respectively provided with heat insulation pads (27), and the outer shells of the housing (1) and the ring heater (2) are both hollow shells filled with a heat insulation layer (28).

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