Rotary heating frame for workpiece heat treatment

Abstract

The utility model relates to a kind of rotary heating frame for workpiece heat treatment, including base, coaxially installed screw rod on base, several support frames are installed on base, arc surface is installed on support frame, arc surface is used to support in the inner side wall of workpiece, rotating seat is installed on screw rod, thread groove is set in the middle of rotating seat, and thread groove is used for screw rod thread connection.The utility model is provided with base, screw rod, support frame, rotating seat, first limit ring, first connecting seat, first connecting rod and second connecting seat, convex block is fixedly connected on the side wall of rotating seat to increase frictional resistance, improve the stability of rotating seat rotation on screw rod, when rotating seat linearly moves on screw rod, first limit ring moves synchronously by following rotating seat, to drive several first connecting rod to rotate and support frame is pried open, support frame is evenly supported inner side wall of workpiece in symmetrical distribution, to improve the adaptability and stability of workpiece support.

Description

Technical Field

[0001] This utility model relates to the field of heating rack technology, specifically a rotary heating rack for heat treatment of workpieces. Background Technology

[0002] Rotary heating racks for workpiece heat treatment are core devices used in heat treatment furnaces. They drive the workpiece to rotate to achieve uniform heating and are suitable for processes such as annealing, quenching, and tempering. They can solve the problems of large local temperature differences and unstable heat treatment quality of workpieces under traditional fixed heating methods and are widely used in batch customized heat treatment of metal workpieces.

[0003] Existing rotary heating racks for workpiece heat treatment typically include a rotary drive structure, consisting of a drive motor, a reducer, a rotating spindle, and an elastic buffer connecting flange. The motor drives the spindle to rotate after being reduced in speed, and the buffer flange can absorb the stress caused by uneven workpiece weight or thermal expansion and contraction, ensuring rotational coaxiality. The second component is a load-bearing structure, based on a ring support base, with support rods used to support and limit the workpiece. When fixing cylindrical workpieces, existing workpiece heat treatment heating racks may have gaps between the workpiece and the support column due to deviations in the internal diameter of the workpiece. This can cause the workpiece to loosen during rotation, resulting in uneven heating of the workpiece surface and affecting the uniformity of rotary heating. Utility Model Content

[0004] The technical problem to be solved by this utility model is that when the existing rotary heating rack for heat treatment of workpieces is used to insert and limit the cylindrical workpiece of a fixed size, the workpiece may become loose during rotation, resulting in uneven heating surface of the workpiece and thus affecting the uniformity of heating.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A rotary heating rack for heat treatment of workpieces includes a base, a threaded rod coaxially mounted on the base, several support frames mounted on the base, each support frame having an arc-shaped surface for supporting the inner sidewall of the workpiece, a rotating seat mounted on the threaded rod, a threaded groove formed in the middle of the rotating seat for threaded connection of the threaded rod, a first limiting ring rotatably connected to the rotating seat, several protrusions fixedly connected to the sidewall of the rotating seat, several first connecting seats fixedly connected to the first limiting ring, each first connecting seat having a first connecting rod mounted on it, and a second connecting seat fixedly connected to each support frame, one end of the first connecting rod being rotatably connected to the first connecting seat, and the other end of the first connecting rod being rotatably connected to the second connecting seat.

[0006] The beneficial effects of this utility model are as follows: by providing a base, a threaded rod, a support frame, a rotating seat, a first limiting ring, a first connecting seat, a first connecting rod, and a second connecting seat, and by fixing protrusions on the side wall of the rotating seat to increase frictional resistance and improve the stability of the rotating seat rotating on the threaded rod, when the rotating seat moves linearly on the threaded rod, the first limiting ring moves synchronously with the rotating seat, thereby driving several first connecting rods to rotate and open the support frame. The support frame is symmetrically distributed and evenly supports the inner side wall of the workpiece, thereby improving the adaptability and stability of the workpiece support.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, several grooves are provided on the surface of the base near the support frame, and sliders are fixedly connected to the bottom of the support frame. The sliders are slidably connected in the middle of the grooves, which improves the stability of the movement of the bottom of the support frame.

[0009] Furthermore, each support frame is fixedly connected to a diagonal brace at its top, which allows the workpiece to slide, thus improving the convenience of workpiece installation and positioning.

[0010] Furthermore, a support block is fixedly connected to the side wall of the support frame, and the support block is used to support the bottom end of the workpiece.

[0011] Furthermore, a second limiting ring is coaxially mounted on the threaded rod, and a third connecting seat is fixedly connected to the side wall of the second limiting ring. A second connecting rod is rotatably connected to each of the third connecting seats, and a fourth connecting seat is fixedly connected to each of the support frames. The fourth connecting seat allows the bottom end of the second connecting rod to rotate, thereby improving the stability of the support frame.

[0012] Furthermore, a collar is rotatably connected to the middle of the second limiting ring, and a through groove is opened in the middle of the collar for the threaded rod to slide.

[0013] Furthermore, a slot is provided on the rotating seat for the first limiting ring to engage.

[0014] Furthermore, a mounting base is coaxially fixedly connected to the bottom end of the base. The mounting base has several threaded grooves. A servo motor is installed at the bottom end of the base, and the output end of the servo motor is fixedly connected to the mounting base.

[0015] The beneficial effects of adopting the above-mentioned further solution are as follows: by setting a sliding groove and a sliding block, the sliding block and the support frame are fixedly connected to form an integral structure, and the sliding block slides in the middle of the sliding groove, which improves the stability of the horizontal movement of the bottom end of the support frame; by using the second limiting ring, the third connecting seat, the second connecting rod and the fourth connecting seat to support the support frame to offset bending stress, the stability of the horizontal movement of the support frame is improved; by setting a collar and a through groove, the through groove allows the threaded rod to slide, thereby improving the stability of the linear movement of the second limiting ring on the threaded rod. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a schematic cross-sectional view of the overall structure of this utility model; Figure 4 This is a schematic diagram of the support frame structure of this utility model; Figure 5 This is a schematic diagram of the unfolded structure of the rotating base of this utility model; Figure 6 This is a schematic diagram of the second limiting ring structure of this utility model; The attached diagram lists the components represented by each number as follows: 1. Base; 2. Threaded rod; 3. Support frame; 4. Rotary seat; 5. First limiting ring; 6. First connecting seat; 7. First connecting rod; 8. Second connecting seat; 9. Second limiting ring; 10. Third connecting seat; 11. Second connecting rod; 12. Servo motor; 13. Fourth connecting seat; 14. Mounting seat; 15. Protrusion; 16. Slide groove; 17. Slider; 18. Support block; 19. Arc surface; 20. Diagonal brace; 21. Threaded groove; 22. Slot; 23. Collar; 24. Through groove. Detailed Implementation

[0017] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0018] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0019] like Figure 1-6As shown, a rotary heating frame for workpiece heat treatment includes a base 1, a threaded rod 2 coaxially mounted on the base 1, and several support frames 3 mounted on the base 1. The base 1, threaded rod 2, and support frames 3 can be made of 310S stainless steel. 310S is often used for core supports inside furnaces at 1000-1200℃, such as furnace bottom supports and high-temperature furnace tube fixing frames. It achieves excellent high-temperature oxidation resistance due to its high chromium and nickel content. Each support frame 3 is equipped with an arc-shaped surface 19, which is used to support the inner wall of the workpiece. The arc-shaped surface 19 is engraved with anti-slip grooves to increase frictional resistance, thereby improving the stability of the support frame 3 in supporting the inner wall of the workpiece. A rotating seat 4 is mounted on the threaded rod 2. A threaded groove 21 is opened in the middle of the rotating seat 4 for threaded connection of the threaded rod 2. Several protrusions 15 are fixedly connected to the side wall of the rotating seat 4. The protrusions 15 are used to increase the frictional resistance and prevent slippage on the surface of the rotating seat 4, thereby facilitating the operator to rotate the rotating seat 4. A first limiting ring 5 is rotatably connected to the rotating seat 4. A slot 22 is provided on the rotating seat 4 for the first limiting ring 5 to engage. The internal dimensions of the slot 22 are adapted to the external dimensions of the first limiting ring 5, thereby improving the stability of the first limiting ring 5 rotating on the rotating seat 4. When the rotating seat 4 rotates, it can drive the first limiting ring 5 to move linearly along the threaded rod 2. Several first connecting seats 6 are fixedly connected to the first limiting ring 5. A first connecting rod 7 is installed on each of the first connecting seats 6. A second connecting seat 8 is fixedly connected to each of the support frames 3. One end of the first connecting rod 7 is connected to the first connecting seat 6. The first connecting rod 7 is rotatably connected to the second connecting seat 8. When the first limiting ring 5 rotates, it can drive several first connecting rods 7 to rotate, thereby pushing the support frame 3 to unfold and thus supporting and limiting the inner wall of the workpiece. Several sliding grooves 16 are opened on the surface of the base 1 near the support frame 3. The bottom end of the support frame 3 is fixedly connected to a slider 17. The slider 17 is fixedly connected to the support frame 3 to form an integral structure. The slider 17 is slidably connected in the middle of the sliding groove 16. The sliding groove 16 supports and limits the slider 17, improving the stability of the movement of the bottom end of the support frame 3. The bottom end of the base 1 is coaxially fixedly connected to a mounting seat 14. Several threaded grooves are opened on the mounting seat 14 for bolt connection. A servo motor 12 is installed at the bottom end of the base 1. The servo motor 12 is bolted to the heat treatment furnace. The output end of the servo motor 12 is fixedly connected to the mounting base 14. When the servo motor 12 starts, it drives the base 1 to rotate. When the base 1 rotates, it drives the workpiece sleeved on the outer surface of the support frame 3 to rotate, thereby making the workpiece rotate and heat in the heat treatment furnace. When the base 1 rotates, it causes the support frame 3 to generate centrifugal force, which further improves the stability of the support frame 3 supporting the inner wall of the workpiece. The heat treatment furnace is a special heating equipment used in the industrial field to carry out controlled thermal cycles such as heating, heat preservation, and cooling of metallic materials or some non-metallic materials to change the internal structure and properties of the materials. It is equipped with a base 1, a threaded rod 2, a support frame 3, a rotating seat 4, a first limiting ring 5, a first connecting seat 6, a first connecting rod 7, and a second connecting seat 8.A protrusion 15 is fixedly connected to the side wall of the rotating seat 4 to increase frictional resistance and improve the stability of the rotating seat 4 rotating on the threaded rod 2. When the rotating seat 4 moves linearly on the threaded rod 2, the first limiting ring 5 moves synchronously with the rotating seat 4, thereby driving several first connecting rods 7 to rotate and open the support frame 3. The support frame 3 is symmetrically distributed and evenly supports the inner side wall of the workpiece through the arc surface 19, thereby improving the adaptability and stability of the support frame 3 in supporting the workpiece.

[0020] In practical use, this invention can also use a smooth round rod to replace the threaded rod 2. Simultaneously, an expansion sleeve is installed on the rotating seat 4. The expansion sleeve is a mechanical device that achieves a keyless connection between the shaft and its components through friction transmission. Its core consists of inner and outer rings, expansion bolts, etc. Tightening the bolts causes the inner and outer rings to elastically deform; the inner ring hugs the shaft, and the outer ring supports the hub. Torque and axial force are transmitted using the friction of the contact surface. The first limiting ring 5 is rotatably connected to the first connecting seat 6, which is fixedly connected to the first limiting ring 5. The two ends of the first connecting rod 7 are rotatably connected to the first connecting seat 6 and the second connecting seat 8, respectively. The operator slides the rotating seat 4, causing the first limiting ring 5 to move linearly along the rotating seat 4, thereby driving the first connecting rod 7 to rotate. This pushes the support frame 3 to unfold and support the inner wall of the workpiece. Tightening the expansion sleeve on the rotating seat 4 prevents the rotating seat 4 from moving on the first limiting ring 5, thus improving the stability of the support frame 3 in supporting the workpiece.

[0021] like Figure 1-6 As shown, each of the top ends of the support frame 3 is fixedly connected with a diagonal brace 20, which allows the workpiece to slide. Several diagonal braces 20 are symmetrically distributed in a cone shape, which facilitates the workpiece to slide along the diagonal brace 20 to the outer surface of the support frame 3, thus improving the convenience of the workpiece being fitted onto the outer surface of the support frame 3. A support block 18 is fixedly connected to the side wall of the support frame 3. The support block 18 is used to support the bottom end of the workpiece, thereby avoiding the bottom end of the workpiece being directly supported on the base 1, thus improving the convenience of heating the bottom end of the workpiece.

[0022] A second limiting ring 9 is coaxially mounted on the threaded rod 2. A third connecting seat 10 is fixedly connected to the side wall of the second limiting ring 9. A second connecting rod 11 is rotatably connected to the third connecting seat 10. A fourth connecting seat 13 is fixedly connected to the support frame 3. The fourth connecting seat 13 allows the bottom end of the second connecting rod 11 to rotate. The second limiting ring 9, the third connecting seat 10, the second connecting rod 11 and the fourth connecting seat 13 work together to support the support frame 3 to counteract bending stress and improve the stability of the horizontal movement of the support frame 3. A collar 23 is rotatably connected in the middle of the second limiting ring 9. A through groove 24 is opened in the middle of the collar 23. The through groove 24 allows the threaded rod 2 to slide, thereby improving the stability of the second limiting ring 9 moving linearly on the threaded rod 2.

[0023] Working principle: When using this type of rotary heating rack for heat treatment of workpieces, the operator first installs the device in the designated position and then connects an external power supply. The operator slides the workpiece to be heated along the inclined brace 20 to the outer surface of the support frame 3, and the workpiece directly contacts the inner wall of the workpiece through the arc surface 19. The bottom end of the workpiece is supported and limited by the support block 18. Then, the rotating seat 4 is rotated, so that the rotating seat 4 moves linearly on the threaded rod 2, thereby pushing the first limiting ring 5 to move linearly on the threaded rod 2, thereby driving the first connecting rod 7 to rotate and opening the support frame 3. The slider 17 is slidably connected in the middle of the slide groove 16, which improves the stability of the movement of the bottom end of the support frame 3. Through the cooperation of the threaded rod 2 and the threaded groove 21, the rotating seat 4 is locked under the action of friction, thereby improving the adaptability and stability of the support frame 3 in supporting the inner wall of the workpiece. By starting the servo motor 12, the base 1 is driven to rotate. When the base 1 rotates, it drives the workpiece sleeved on the outer surface of the support frame 3 to rotate, thereby making the workpiece rotate and heat in the heat treatment furnace.

[0024] The second limiting ring 9, the third connecting seat 10, the second connecting rod 11 and the fourth connecting seat 13 work together to support the support frame 3 to counteract bending stress, thereby improving the stability of the horizontal movement of the support frame 3. By providing a collar 23 and a through groove 24, the through groove 24 allows the threaded rod 2 to slide, thereby improving the stability of the linear movement of the second limiting ring 9 on the threaded rod 2.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rotary heating rack for heat treatment of workpieces, characterized by: It includes a base (1), on which a threaded rod (2) is coaxially mounted. Several support frames (3) are mounted on the base (1), and each support frame (3) has an arc-shaped surface (19) mounted on it. The arc-shaped surface (19) is used to support the inner side wall of the workpiece. A rotating seat (4) is mounted on the threaded rod (2). A threaded groove (21) is opened in the middle of the rotating seat (4). The threaded groove (21) is used for threaded connection of the threaded rod (2). A first limiting ring (5) is rotatably connected to the rotating seat (4). Several protrusions (15) are fixedly connected to the side wall of the rotating seat (4). A number of first connecting seats (6) are fixedly connected to the limiting ring (5). A first connecting rod (7) is installed on each of the first connecting seats (6). A second connecting seat (8) is fixedly connected to each of the support frames (3). One end of the first connecting rod (7) is rotatably connected to the first connecting seat (6), and the other end of the first connecting rod (7) is rotatably connected to the second connecting seat (8). A number of sliding grooves (16) are opened on the surface of the base (1) near the support frame (3). A slider (17) is fixedly connected to the bottom end of the support frame (3). The sliders (17) are slidably connected in the middle of the sliding grooves (16).

2. The rotary heating rack for heat treatment of workpieces according to claim 1, characterized in that, The top of each support frame (3) is fixedly connected with a diagonal brace (20), which allows the workpiece to slide.

3. The rotary heating rack for heat treatment of workpieces according to claim 1, characterized in that, A support block (18) is fixedly connected to the side wall of the support frame (3). The support block (18) is used to support the bottom of the workpiece.

4. The rotary heating rack for heat treatment of workpieces according to claim 1, characterized in that, A second limiting ring (9) is coaxially mounted on the threaded rod (2). A third connecting seat (10) is fixedly connected to the side wall of the second limiting ring (9). A second connecting rod (11) is rotatably connected to the third connecting seat (10). A fourth connecting seat (13) is fixedly connected to the support frame (3). The fourth connecting seat (13) allows the bottom end of the second connecting rod (11) to rotate.

5. The rotary heating rack for heat treatment of workpieces according to claim 4, characterized in that, The second limiting ring (9) is rotatably connected to a collar (23), and a through groove (24) is provided in the middle of the collar (23) for the threaded rod (2) to slide.

6. The rotary heating rack for heat treatment of workpieces according to claim 1, characterized in that, The rotating seat (4) has a slot (22) for the first limiting ring (5) to engage.

7. The rotary heating rack for heat treatment of workpieces according to claim 1, characterized in that, The bottom end of the base (1) is coaxially fixedly connected to the mounting base (14), which has several threaded grooves. The bottom end of the base (1) is equipped with a servo motor (12), and the output end of the servo motor (12) is fixedly connected to the mounting base (14).

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