Preheating furnace used before stamping of cast copper motor rotor silicon steel sheet

Abstract

The utility model relates to the technical field of preheating furnaces, in particular to a preheating furnace used before stamping a cast copper motor rotor silicon steel sheet, which comprises a preheating furnace main body, the supporting and transporting frame is movably arranged in the preheating furnace main body and comprises two limiting frames, supporting legs are fixedly arranged at the bottoms of the limiting frames, and the supporting legs are in sliding fit with sliding grooves in the inner bottom wall of the preheating furnace main body; the beneficial effects of the utility model are that the electric heating pipe is adopted as a heat source, and the design of the efficient inner thermal insulation layer is combined, so that the rapid heating of the silicon steel sheet for the motor rotor is realized, and the accuracy of temperature control is obviously improved. Therefore, the cast copper motor rotor silicon steel sheet can be uniformly heated in the preheating process, and the insulation film of the silicon steel sheet is prevented from being damaged, so that the safety of materials and the quality stability of the rotor silicon steel sheet subjected to copper liquid die casting are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of preheating furnaces, and particularly relates to a preheating furnace for silicon steel sheets of cast copper motor rotors before stamping. Background Art

[0002] In the field of motor manufacturing, especially in the production process of silicon steel sheets and iron core parts of cast copper motor rotors, the preheating step is an important link to ensure product quality and performance. Before copper hydraulic casting of silicon steel sheets of cast copper motor rotors, it is usually necessary to reach a certain temperature to match with high-temperature copper liquid, so as to optimize the plasticity and toughness of the material, prevent the rotor squirrel cage bars from breaking, and thus improve the accuracy of the internal conductive grooves of the rotor during the die-casting process and the yield rate of the rotor. However, traditional preheating methods often have problems such as slow heating speed, inaccurate temperature control, mismatch between high-temperature copper liquid and low-temperature rotor silicon steel sheets, damage to the insulation film of the silicon steel sheets, occurrence of bar breakage and crack defects, and low energy utilization efficiency.

[0003] However, existing preheating equipment has many deficiencies in structure and function, and it is difficult to meet the high-precision and high-efficiency requirements of modern cast copper motor rotor manufacturing.

[0004] First of all, traditional preheating equipment often adopts a single heating method, such as resistance heating or hot air circulation heating. These methods have problems of slow heating speed and inaccurate temperature control. Especially for large-size and high-requirement parts such as cast copper motor rotors, uneven heating will cause local overheating or underheating, affecting material properties and stamping quality.

[0005] Secondly, the structural design of traditional preheating equipment is often unreasonable, lacking special support and transportation devices, resulting in easy deformation or damage of the rotor during the preheating process. At the same time, the lack of an effective clamping device also makes it difficult for the rotor to maintain a stable posture during the preheating process, further increasing the risk of deformation.

[0006] In the prior art, there is a lack of effective support, transportation and clamping devices, and it is difficult to meet the strict requirements of motor rotor manufacturing for high precision, high efficiency and anti-deformation. Therefore, how to overcome the above existing technical problems and defects has become a key problem to be solved. Summary of the Utility Model

[0007] The invention purpose of the utility model is to overcome the defects in the background art that there is a lack of effective support, transportation and clamping devices, and it is difficult to meet the strict requirements of cast copper motor rotor manufacturing for high precision, high efficiency, anti-bar breakage and crack, and anti-degeneration of the insulation film of the silicon steel sheet, so as to realize a preheating furnace for silicon steel sheets of cast copper motor rotors before stamping.

[0008] To achieve the above invention purpose, the technical solution of the utility model is: a preheating furnace for silicon steel sheets of cast copper motor rotors before stamping, including a preheating furnace main body;

[0009] A support transport rack, movably arranged inside and outside the preheating furnace body, comprising:

[0010] Two limiting frames, with support legs fixedly arranged at the bottom, and the support legs are slidably matched with the sliding grooves on the inner bottom wall of the preheating furnace body;

[0011] Two telescopic rods, respectively telescopically and slidably arranged between the two limiting frames, and grooves for the telescopic rods to slide are arranged at one end of each limiting frame;

[0012] A clamping member, placed on the telescopic rods and the limiting frames.

[0013] In the preheating furnace used before stamping the cast copper motor rotor, support seats are fixedly connected to both sides of the preheating furnace body, and a pressure discharge pipe is connected to the top.

[0014] In the preheating furnace used before stamping the motor rotor, it further includes a cover plate, arranged on one side of the preheating furnace body, and its two sides are slidably connected to one of the support seats, and a handle is fixedly arranged on one side of the cover plate;

[0015] An electric telescopic rod, fixedly installed on the top of one of the support seats, and its telescopic end is connected to the top of the cover plate;

[0016] The electric telescopic rod is used to drive the cover plate to open and close at the opening of the preheating furnace body.

[0017] In the preheating furnace used before stamping the cast copper motor rotor, it further includes an inner insulation layer, which wraps and covers the inner side wall of the preheating furnace body;

[0018] Multiple electric heating tubes, respectively installed on three sides inside the preheating furnace body.

[0019] In the preheating furnace used before stamping the motor rotor, the clamping member includes two clamping plates, which are hinged to both sides of a connecting plate;

[0020] A placement plate, fixedly arranged at one end of the connecting plate;

[0021] A rotating rod, with a threaded column fixedly arranged at the bottom, and internal threads matching the threaded column are arranged at the top of the connecting plate.

[0022] In the preheating furnace used before stamping the silicon steel sheet of the cast copper motor rotor, the clamping member further includes a limiting plate, the top of which is rotatably connected to the bottom of the threaded column, and connecting shafts are fixedly arranged on both sides of the limiting plate;

[0023] Inclined sliding grooves are opened on the clamping plates for the connecting shafts to slide;

[0024] Rotating columns, multiple, are respectively rotatably arranged at the bottom of the limiting plate and on both sides of the clamping plate.

[0025] Compared with the prior art, the preheating furnace for copper-cast motor rotor silicon steel sheets before stamping of the present utility model has at least the following beneficial effects:

[0026] The preheating furnace for copper-cast motor rotor silicon steel sheets before stamping of the present utility model, by using electric heating tubes as the heat source and combining with an efficient heat insulation layer design, realizes the rapid heating of the silicon steel sheets, and significantly improves the accuracy of temperature control and the speed of production efficiency. This ensures that the copper-cast motor rotor silicon steel sheets are evenly heated during the preheating process, ensures that the insulating film of the silicon steel sheets is not damaged, thereby improving the safety of the material and the quality stability of the rotor silicon steel sheets after die-casting copper liquid, optimizing the plasticity and toughness of the material, preventing the rotor squirrel cage wires from breaking, and thus improving the accuracy of the internal conductive grooves of the silicon steel sheets during the die-casting process and the yield rate of the rotors.

[0027] The support transport frame and the clamping parts can not only effectively support and fix the silicon steel sheets, reduce their deformation or damage during the preheating process, but also ensure that the silicon steel sheets maintain a stable posture during the preheating process, further improving the stability and reliability of the equipment. Description of the Drawings

[0028] Figure 1 is the overall structural schematic diagram of the present utility model;

[0029] Figure 2 is the sectional schematic diagram of the preheating furnace body of the present utility model;

[0030] Figure 3 is the front view schematic diagram of the support transport frame of the present utility model;

[0031] Figure 4 is the front view schematic diagram of the clamping part of the present utility model;

[0032] Figure 5 is the front view schematic diagram of the clamping part of the present utility model.

[0033] In the figure: 1. Preheating furnace body; 2. Pressure discharge pipe; 3. Support seat; 4. Cover plate; 5. Handle; 6. Electric telescopic rod; 7. Support transport frame; 701. Limiting frame; 702. Support leg; 703. Telescopic rod; 8. Clamping part; 801. Clamping plate; 802. Placing plate; 803. Rotating rod; 804. Connecting plate; 805. Limiting plate; 806. Connecting shaft; 807. Inclined sliding groove; 808. Threaded column; 809. Rotating column; 9. Electric heating tube; 10. Heat insulation layer; 11. Electric control cabinet. Detailed Embodiments

[0034] The following will combine the attached drawings and through specific implementation manners to make a more detailed description of the preheating furnace for the copper-cast motor rotor before stamping of the present utility model.

[0035] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0036] This embodiment discloses a preheating furnace for the silicon steel sheet of the copper-cast motor rotor before stamping. The beneficial effects are as follows: integrating an electric opening and closing cover plate, a heat preservation layer and double-sided electric heating tubes to achieve efficient and uniform preheating. Refer to Figure 1 , Figure 2 , which mainly includes a preheating furnace main body 1. An electric control cabinet 11 is installed on one side of the preheating furnace main body 1. Support seats 3 are fixedly connected to both sides of the preheating furnace main body 1, and a pressure discharge pipe 2 is connected to the top. It also includes a cover plate 4, which is arranged on one side of the preheating furnace main body 1, and both sides of which are slidably connected to one of the support seats 3. A handle 5 is fixedly arranged on one side of the cover plate 4. An electric telescopic rod 6 is fixedly installed on the top of one of the support seats 3, and its telescopic end is connected to the top of the cover plate 4. The electric telescopic rod 6 is used to drive the cover plate 4 to open and close at the opening of the preheating furnace main body 1. It also includes a heat preservation layer 10, which wraps and covers the inner side wall of the preheating furnace main body 1. There are multiple electric heating tubes 9, which are respectively installed on three sides inside the preheating furnace main body 1.

[0037] The preheating furnace main body 1, as the basic framework of the entire equipment, has the support seats 3 firmly connected to both sides of it, which not only enhances the stability of the overall structure but also provides a solid foundation for the installation of subsequent components. The pressure discharge pipe 2 arranged at the top effectively ensures the stability and safety of the furnace pressure during the preheating process, preventing safety accidents caused by excessive pressure.

[0038] In addition, in order to further improve the preheating effect, the inner side wall of the preheating furnace main body 1 is carefully wrapped with a heat preservation layer 10. This heat preservation layer is made of high-efficiency heat insulation materials, which can effectively reduce heat dissipation and ensure the stability and uniformity of the furnace temperature. In this way, the silicon steel sheet can enjoy a more continuous and stable heat source during the preheating process, thereby improving the preheating efficiency and quality.

[0039] On both sides inside the main body 1 of the preheating furnace, multiple electric heating tubes 9 are evenly distributed. These electric heating tubes, as the main heat source, quickly and evenly heat the silicon steel sheets by converting electrical energy into heat energy. Their unique layout ensures that the heat can fully cover and penetrate into the motor rotor, thus achieving an efficient preheating effect.

[0040] An adjustable bracket, through the combination of a limit frame and a telescopic rod, realizes flexible movement and adjustment inside the main body of the preheating furnace, referring to Figure 1 、 Figure 3 The support and transport frame 7 is movably arranged inside the main body 1 of the preheating furnace and includes: two limit frames 701, with support legs 702 fixedly provided at the bottom. The support legs 702 are in sliding fit with the sliding grooves on the inner bottom wall of the main body 1 of the preheating furnace. Two telescopic rods 703 are respectively telescopically slidably arranged between the two limit frames 701, and grooves for the telescopic rods 703 to slide are provided at one end of each limit frame 701.

[0041] This adjustable bracket system is ingeniously integrated into the internal structure of the main body 1 of the preheating furnace. The support legs 702 not only provide stable support for the entire bracket system but also, through sliding fit with the sliding grooves on the inner bottom wall of the main body 1 of the preheating furnace, realize the horizontal movement function of the bracket inside the preheating furnace.

[0042] And the two telescopic rods 703 are respectively telescopically slidably arranged between the two limit frames 701. Their existence further enhances the flexibility and adaptability of the bracket system. By adjusting the length of the telescopic rods 703, users can easily change the span or height of the bracket system to meet the preheating requirements of silicon steel sheets of different sizes.

[0043] The clamping member realizes the stable clamping and flexible adjustment of the silicon steel sheet through the design of the hinged clamping plate, the threaded adjustment rotating rod, and the sliding limit plate, referring to Figure 1 、 Figures 3 - 5 The clamping member 8 is placed on the telescopic rod 703 and the limit frame. The clamping member 8 includes two clamping plates 801, which are hingedly connected to both sides of the connecting plate 804. A placement plate 802 is fixedly arranged at one end of the connecting plate 804. The rotating rod 803 has a threaded column 808 fixedly provided at its bottom, and the top of the connecting plate 804 is provided with internal threads matching the threaded column 808. The clamping member 8 further includes a limit plate 805, whose top is rotatably connected to the bottom of the threaded column 808, and connecting shafts 806 are fixedly provided on both sides of the limit plate 805. Inclined sliding grooves 807 are opened on the clamping plates 801 for the connecting shafts 806 to slide. Multiple rotating columns 809 are respectively rotatably arranged at the bottom of the limit plate 805 and on both sides of the clamping plates 801.

[0044] The clamping member 8 is designed to provide a solution that can firmly clamp silicon steel sheets and be flexibly adjusted as needed. Its core components include two clamping plates 801, which are connected to both sides of the connecting plate 804 by means of hinges. This design allows the clamping plates to be adaptively adjusted according to the shape and size of the motor rotor. At the same time, a placement plate 802 is fixedly arranged at one end of the connecting plate 804, providing a stable support platform for the silicon steel sheets.

[0045] The clamping member 8 introduces a key component, the rotating rod 803. A threaded post 808 is fixedly provided at the bottom of the rotating rod 803, and internal threads matching the threaded post 808 are provided at the top of the connecting plate 804. By rotating the rotating rod, the interaction between the threaded post and the internal threads will push or pull the connecting plate 804, thereby driving the opening and closing of the clamping plates 801 to achieve the clamping or release of the silicon steel sheets.

[0046] To further enhance the clamping stability and adjustment accuracy, the clamping member 8 is also designed with a limiting plate 805. The top of the limiting plate 805 is rotatably connected to the bottom of the threaded post 808, ensuring that the rotating rod can maintain a stable movement trajectory during rotation. At the same time, connecting shafts 806 are fixedly provided on both sides of the limiting plate 805, and these connecting shafts can slide in the inclined sliding grooves 807 opened on the clamping plates 801. As the clamping plates open and close, the positions of the connecting shafts in the sliding grooves will also change accordingly, thus realizing the guidance and limitation of the movement trajectory of the clamping plates.

[0047] In addition, the clamping member 8 is also provided with a plurality of rotating columns 809 at the bottom of the limiting plate 805 and on both sides of the clamping plates 801. These rotating columns not only enhance the overall structural strength of the clamping member but also can reduce the friction and wear between components to a certain extent, extend the service life of the clamping member, and enable the clamped silicon steel sheets to rotate.

[0048] Working principle of the preheating furnace for copper-cast motor rotor silicon steel sheets before stamping in the present utility model: When this device is in use, first stack the copper-cast motor rotor silicon steel sheets on the dummy shaft. During the motor manufacturing process, the silicon steel sheets will ultimately be installed on the motor rotor. Stacking the silicon steel sheets on the dummy shaft can ensure that the silicon steel sheets maintain a relatively stable shape and position during preheating, avoiding deformation or misalignment caused by separate preheating. At the same time, the design of the dummy shaft also facilitates uniform heat transfer, enabling the silicon steel sheets to reach the preheating temperature faster and more evenly. Then place them between two clamping plates. The staff sets the preheating temperature on the electric control cabinet and manipulates the lifting switch to control the cover plate. Then the staff makes the rotating rod drive the threaded column to descend. The threaded column drives the limiting plate and the connecting shaft to descend. The connecting shaft slides in the inclined chute, causing the connecting shaft to push the two clamping plates to move towards each other to clamp the silicon steel sheets stacked on the rotor dummy shaft. When the clamping force is too low, the rotating columns on the clamping plate and the limiting plate contact the motor rotor to clamp and fix it, enabling the silicon steel sheets on the rotor dummy shaft to rotate on the rotating columns to change the heating direction of the silicon steel sheets on the dummy shaft. Place the placement plate on the top of the limiting frame and the two telescopic rods. By pulling the two limiting frames, the telescopic columns are pulled out or retracted into the interior of the limiting frame for use. Then push the support legs to move the support transport frame into the interior of the preheating furnace body. The cover plate is driven to move downward by the electric telescopic rod to block the preheating furnace body. When encountering an emergency or special situation, the staff can forcibly move the cover plate through the handle. Heat the interior of the preheating furnace body through the electric heating tubes to preheat the silicon steel sheets on the dummy shaft.

[0049] It should be noted that when this device is specifically implemented, the structures described in the attached drawings of this specification are not fixed and immutable implementation manners. Usually, the components of the embodiments of the present utility model described and shown in the attached drawings here can be arranged and designed in various different configurations. In addition, the attached drawings of this specification and the abstract drawings are only schematic diagrams, not representing the specific structures and actual quantities, etc. during specific implementation.

[0050] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meaning understood by those of ordinary skill in the field to which the present utility model belongs. Similar words such as "a" or "one" used in the specification and claims of this application do not necessarily indicate a quantity limitation. Words such as "comprising" or "including" mean that the elements or components appearing before this word cover the elements or components listed after this word and their equivalents, without excluding other elements or components. Words such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0051] The exemplary embodiments of the present utility model have been described in detail above with reference to the preferred embodiments. However, those skilled in the art can understand that, without departing from the concept of the present utility model, various modifications and variations can be made to the above specific embodiments, and various combinations of the technical features and structures proposed by the present utility model can be made without exceeding the protection scope of the present utility model.

Claims

1. A preheating furnace for stamping silicon steel sheets of cast copper motor rotors, characterized in that: It comprises a preheating furnace body (1); The support and transport frame (7) is movably arranged inside the preheating furnace body (1), and comprises: The two limiting frames (701) are both fixedly provided with supporting legs (702) at the bottom, and the supporting legs (702) are slidably matched with the sliding grooves on the inner bottom wall of the preheating furnace body (1); Two telescopic rods (703) are respectively slidably arranged between the two limiting frames (701), and one end of the limiting frame (701) is provided with a groove for the telescopic rod (703) to slide; The clamping member (8) is placed on the telescopic rod (703) and the limiting frame.

2. The preheating furnace for stamping silicon steel sheets of cast copper motor rotor according to claim 1, characterized in that: The preheating furnace body (1) is provided with fixedly connected support seats (3) on both sides and a connected pressure relief pipe (2) on the top.

3. The preheating furnace for stamping silicon steel sheets of cast copper motor rotor according to claim 1, characterized in that: It also includes a cover plate (4) which is arranged on one side of the preheating furnace body (1), and whose two sides are slidably connected to one of the support seats (3); a handle (5) is fixedly provided on one side of the cover plate (4); An electric telescopic rod (6) is fixedly mounted on the top of one of the support seats (3), and its telescopic end is connected to the top of the cover plate (4); The electric telescopic rod (6) is used to drive the cover plate (4) to open and close the opening of the preheating furnace body (1).

4. The preheating furnace for stamping silicon steel sheets of cast copper motor rotor according to claim 1, characterized in that: It also includes a heat-insulating layer (10) that wraps and covers the inner wall of the preheating furnace body (1); A plurality of electric heating tubes (9) are respectively installed on three sides of the interior of the preheating furnace body (1).

5. The preheating furnace for stamping silicon steel sheets of cast copper motor rotor according to claim 1, characterized in that: The clamping member (8) comprises two clamping plates (801) hingedly connected to both sides of the connecting plate (804); a placing plate (802) fixedly arranged at one end of the connecting plate (804); The bottom of the rotating rod (803) is fixedly provided with a threaded column (808), and the top of the connecting plate (804) is provided with an internal thread matching the threaded column (808).

6. The preheating furnace for stamping silicon steel sheets of cast copper motor rotor according to claim 5, characterized in that: The clamping member (8) further comprises a limiting plate (805), the top of which is rotatably connected to the bottom of the threaded column (808), and connecting shafts (806) are fixedly provided on both sides of the limiting plate (805); An inclined slide groove (807) is provided on the clamping plate (801) for the connecting shaft (806) to slide; A plurality of rotating posts (809) are rotatably disposed at the bottom of the limiting plate (805) and at both sides of the clamping plate (801).

Images