Babbitt metal centrifugal casting machine for sliding bearing

Abstract

The utility model relates to the field of sliding bearing manufacturing, in particular to a sliding bearing Babbitt metal centrifugal casting machine which comprises a machine frame, a variable frequency motor is fixed to the rear machine frame, the rear machine frame is rotationally connected with a main shaft, the main shaft is driven by the variable frequency motor, and the main shaft is fixedly connected with a first clamping plate. Two oil cylinders are fixed on the front rack and are positioned above the front rack; a second clamping plate is fixed to the telescopic end of the oil cylinder, a workpiece is clamped between the second clamping plate and the first clamping plate, and a hollow shaft is fixed to the center of the second clamping plate. A funnel is slidably connected to the supporting guide rail. The funnel is driven by a cylinder which is fixed on the front rack; a flame gun is fixed on the front rack and faces the funnel; protective covers are arranged outside the first clamping plate and the second clamping plate. The processes of funnel preheating, workpiece clamping and positioning, workpiece rotating, metal conveying, centrifugal attaching, rapid cooling and the like in the casting process are achieved, meanwhile, safety is improved, and the capacity of adapting to workpieces of different sizes is higher.

Description

Technical Field

[0001] This utility model relates to the field of sliding bearing manufacturing, specifically a centrifugal casting machine for Babbitt alloy sliding bearings. Background Technology

[0002] High-speed sliding bearings are widely used in rotating machinery. Babbitt metal, a white alloy made of tin, lead, antimony, copper, and other metals, is used in the casting of high-speed bearings. This casting process is the core manufacturing process of high-speed bearings and directly affects the reliability of the product. In this type of bearing manufacturing process, the Babbitt metal must be bonded to the base material, which is usually made of low-carbon steel. The strength of the connection between the two plays a crucial role in the stable operation of the bearing. During the casting process, both ends of the workpiece need to be blocked, and the high-temperature Babbitt metal is poured into the inner hole of the workpiece and then rapidly cooled to room temperature.

[0003] However, in existing Babbitt centrifugal casting machines, the temperature of the Babbitt alloy flowing into the workpiece is reduced too much due to the cooling of the funnel, resulting in insufficient adhesion of the Babbitt alloy and a decrease in the yield rate. Furthermore, the high temperature of the operating environment and the high speed of the workpiece rotation pose a danger to the operator. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, this utility model provides a centrifugal casting machine for sliding bearing Babbitt alloy.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a centrifugal casting machine for sliding bearings made of Babbitt alloy, comprising a frame, the frame including a front frame and a rear frame, the front frame and the rear frame being fixedly connected, a variable frequency motor fixedly mounted on the rear frame, a main shaft rotatably connected to the rear frame, the main shaft being driven by the variable frequency motor, a first clamping plate fixedly connected to the main shaft, two hydraulic cylinders fixedly mounted on the front frame above the front frame, a second clamping plate fixedly mounted on the telescopic end of each hydraulic cylinder, the workpiece being clamped between the second clamping plate and the first clamping plate and radially positioned by a stop. The second clamping plate has a central hole and a hollow shaft is fixed thereon. A cylindrical guide rail is fixed on the front frame, and a slide table is slidably connected to the cylindrical guide rail. The hollow shaft is rotatably connected to the slide table. A support guide rail is fixed above the slide table, and a funnel is slidably connected to the support guide rail. The funnel has an opening at its upper end and an outlet for inserting the hollow shaft on its side. The funnel is driven by a cylinder, which is fixed to the front frame. A flamethrower is fixed on the front frame, and the flamethrower faces the funnel. Protective covers are provided on the outer sides of the first and second clamping plates, and the protective covers are slidably connected to the frame.

[0006] As a further preferred embodiment of this utility model, a thermometer is fixed to the side of the protective cover, and a water spray hole is provided at the top of the protective cover.

[0007] The above setup is used to measure the temperature of the workpiece and cool it through water spray holes.

[0008] As a further preferred embodiment of this utility model, a position probe is fixed on the slide table. The position probe is used to provide feedback on the position of the protective cover, thereby determining the position of the protective cover and improving safety.

[0009] As a further preferred embodiment of this utility model, a water return port is provided below the first clamping plate, and the water return port is located on the rear frame.

[0010] The return water inlet is used to recycle cooling water.

[0011] As a further preferred embodiment of this utility model, the front frame is fixed with a walking motor for driving the protective cover to move back and forth.

[0012] The walking motor is used to move the protective cover.

[0013] As a further preferred embodiment of this utility model, a small pulley is fixedly connected to the output end of the variable frequency motor, and a large pulley is fixed to the end of the main shaft away from the first clamping plate. The small pulley and the large pulley are connected by a transmission belt. The variable frequency motor moves laterally and is re-fixed to adjust the distance between the large pulley and the small pulley.

[0014] By adjusting the position of the variable frequency motor, the transmission belt is tightened, which facilitates transmission.

[0015] As a further preferred embodiment of this utility model, a speed probe is fixed at the rear frame, and the speed probe is used to measure the spindle speed.

[0016] As a further preferred embodiment of this invention, the funnel is made of stainless steel, and the contact area with the molten metal is polished.

[0017] By using polishing settings, the adhesion of Babbitt alloy solution is prevented, thus avoiding waste.

[0018] As a further preferred embodiment of this invention, the funnel is hinged at the sliding connection point with the supporting guide rail.

[0019] With its hinged design, the funnel can be folded within 80° to direct the flame from the flame gun over the entire machine.

[0020] Technical effects and advantages of the utility model:

[0021] The radial sliding bearing Babbitt alloy centrifugal casting machine realizes the alloy bonding process and ensures the bonding strength meets the requirements. At the same time, it makes the base workpiece rotate at high speed and pours the high-temperature molten Babbitt alloy into the inner hole of the base. It realizes the funnel preheating, workpiece clamping and positioning, workpiece rotation, metal conveying, centrifugal bonding, and rapid cooling processes in the casting process. At the same time, it improves safety and has a stronger ability to adapt to workpieces of different sizes. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a centrifugal casting machine for sliding bearings of Babbitt alloy according to this utility model.

[0023] Figure 2 This is a side view of a centrifugal casting machine for a sliding bearing Babbitt alloy according to this utility model.

[0024] Figure 3 This is a top view of a centrifugal casting machine for a sliding bearing Babbitt alloy according to this utility model.

[0025] Figure 4 This is a schematic diagram of the hopper flipping mechanism of a centrifugal casting machine for a sliding bearing Babbitt alloy according to this utility model.

[0026] The attached diagram is labeled as follows: 1. First clamping plate; 2. Thermometer; 3. Water spray hole; 4. Workpiece; 5. Protective cover; 6. Slide table; 7. Funnel; 8. Oil cylinder; 9. Air cylinder; 10. Flamethrower; 11. Front frame; 12. Speed ​​probe; 13. Main spindle; 14. Large pulley; 15. Rear frame; 16. Drive belt; 17. Small pulley; 18. Variable frequency motor; 19. Second clamping plate; 20. Hollow shaft; 21. Support guide rail; 22. Cylindrical guide rail; 23. Roller; 24. Travel motor; 25. Water return port; 26. Position probe. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] See appendix Figure 1-3As shown, a centrifugal casting machine for sliding bearings using Babbitt alloy includes a frame comprising a front frame 11 and a rear frame 15, which are fixedly connected. A variable frequency motor 18 is fixedly mounted on the rear frame 15, and a main shaft 13 is rotatably connected to the rear frame 15. The main shaft 13 is driven by the variable frequency motor 18, and a first clamping plate 1 is fixedly connected to the main shaft 13. Two hydraulic cylinders 8 are fixedly mounted on the front frame 11, located above it. A second clamping plate 19 is fixed to the telescopic end of each hydraulic cylinder 8. A workpiece 4 is clamped between the second clamping plate 19 and the first clamping plate 1, and radially positioned by a stop. The second clamping plate 19 has a central opening and... A hollow shaft 20 is fixedly mounted. A cylindrical guide rail 22 is fixedly mounted on the front frame 11. A slide table 6 is connected to the cylindrical guide rail 22 via rollers 23. The hollow shaft 20 is rotatably connected to the slide table 6. A support guide rail 21 is fixed above the slide table 6. A funnel 7 is slidably connected to the support guide rail 21. The funnel 7 has an opening at its upper end and an outlet for inserting the hollow shaft 20 on its side. The funnel 7 is driven by a cylinder 9, which is fixed to the front frame. A flame gun 10 is fixed on the front frame 11, facing the funnel 7. A protective cover 5 is provided on the outer side of the first clamping plate 1 and the second clamping plate 19, and the protective cover 5 is slidably connected to the frame.

[0029] like Figure 1 As shown in this embodiment of the utility model, a thermometer 2 is fixed on the side of the protective cover 5. The thermometer 2 is an infrared thermometer 2. A water spray hole 3 is opened at the top of the protective cover 5. Through the above settings, the temperature of the workpiece 4 is measured and cooled through the water spray hole 3.

[0030] like Figure 1 As shown in this embodiment of the present invention, a position probe 26 is fixed on the slide table 6. The position probe 26 is used to provide feedback on the position of the protective cover 5, thereby determining the position of the protective cover 5 and improving safety.

[0031] like Figure 3 As shown in this embodiment of the utility model, a water return port 25 is provided below the first clamping plate 1. The water return port 25 is opened on the rear frame 15. The water return port 25 is used to recover the cooling water from the self-spraying water hole 3.

[0032] like Figure 1 and Figure 3 As shown in this embodiment of the utility model, the front frame 11 is fixed with a walking motor 24, which is used to drive the protective cover 5 to move back and forth. The walking motor 24 is used to move the protective cover 5.

[0033] like Figure 2As shown in this embodiment of the utility model, a small pulley 17 is fixedly connected to the output end of the variable frequency motor 18, and a large pulley 14 is fixed to the end of the main shaft 13 away from the first clamping plate 1. The small pulley 17 and the large pulley 14 are connected by a transmission belt 16. The variable frequency motor 18 moves laterally and re-fixes itself to adjust the distance between the large pulley 14 and the small pulley 17. By adjusting the position of the variable frequency motor 18, the transmission belt 16 is tightened, which facilitates transmission.

[0034] like Figure 3 As shown in this embodiment of the present invention, a speed probe 12 is fixed at the rear frame 15, and the speed probe 12 is used to measure the speed of the spindle 13.

[0035] like Figure 4 As shown in this embodiment of the present invention, the funnel 7 is hinged to the sliding connection of the support guide rail 21. The funnel 7 is made of stainless steel and the contact position with the molten metal is polished. The polishing setting avoids the adhesion of Babbitt alloy solution, which would cause waste. The hinge setting allows the funnel 7 to be folded within 80° so that the flame sprayed by the flame gun 10 can be directed to the top of the entire machine. By utilizing the residual heat of the funnel 7, the waste caused by the Babbitt alloy solution adhering to the funnel 7 is avoided, and premature cooling is also avoided, which would prevent the workpiece 4 from being formed.

[0036] The specific working steps are as follows, such as Figure 3 As shown, 1. The flame gun 10 preheats the funnel 7 to 300°C, otherwise the temperature of the Babbitt alloy flowing into the workpiece 4 will drop too much, resulting in insufficient adhesion of the Babbitt alloy.

[0037] 2. Activating the hydraulic cylinder 8 pushes the slide table 6, which can quickly clamp the workpiece 4 and maintain the clamping force. The variable frequency motor 18 causes the first clamping plate 1, the second clamping plate 19, and the workpiece 4 to rotate synchronously to prevent slippage. Slippage will prevent the Babbitt alloy from adhering properly. The purpose of rapid clamping is because the workpiece needs to be preheated before clamping, and too slow a speed will affect the adhesion force.

[0038] 3. Start the walking motor 24, move the protective cover 5 to the position where the position probe 26 has a signal, and then stop the protective cover 5.

[0039] 4. Start the variable frequency motor 18 to the specified speed.

[0040] 5. After the funnel 7 is heated, it is lowered and pushed to the designated position by the cylinder 9. At this time, a certain amount of molten Babbitt alloy can be poured into the funnel 7.

[0041] 6. The water sprayer sprays water onto workpiece 4. When the temperature detected by thermometer 2 is lower than the specified value, the water spraying stops. The casting process is complete.

[0042] The above are merely preferred embodiments of the present utility model and are 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 shall be included within the protection scope of the present utility model.

Claims

1. A sliding bearing babbitt alloy centrifugal casting machine comprising a frame, the frame comprising a front frame and a rear frame, the front frame and the rear frame being fixedly connected, a variable frequency motor being fixed to the rear frame, characterized in that: The rear frame is rotationally connected with a main shaft, the main shaft is driven by a variable frequency motor, and the main shaft is fixedly connected with a first clamping plate; The front frame is fixed with two oil cylinders located above the front frame; the telescopic end of the oil cylinder is fixed with a second clamping plate, the workpiece is clamped between the second clamping plate and the first clamping plate, and is radially positioned through a stop opening, the second clamping plate is provided with a central hole and is fixed with a hollow shaft; The front frame is fixed with a cylindrical guide rail, and the cylindrical guide rail is slidingly connected with a sliding table; The hollow shaft is rotationally connected to the sliding table; The sliding table is fixed with a support guide rail above, and the support guide rail is slidingly connected with a hopper; The hopper is open at the upper end, and the side surface is provided with an outlet into which the hollow shaft is inserted; The hopper is driven by a gas cylinder, and the gas cylinder is fixed to the front frame; The front frame is fixed with a flame gun, and the flame gun faces the hopper; The first clamping plate and the second clamping plate are provided with protective covers which are slidingly connected to the frame.

2. A centrifugal casting machine for Babbitt alloys for plain bearings according to claim 1, characterized in that The protective cover is fixed with a thermometer on the side surface, and a water spraying hole is formed at the top end of the protective cover.

3. A centrifugal casting machine for Babbitt alloys for plain bearings according to claim 1, characterized in that The sliding table is fixed with a position probe which is used to feedback the position of the protective cover.

4. A centrifugal casting machine for Babbitt alloys for plain bearings according to claim 1, characterized in that The first clamping plate is provided with a water return opening below, and the water return opening is formed in the rear frame.

5. A centrifugal casting machine for Babbitt alloys for plain bearings according to claim 1, characterized in that The front frame is fixed with a walking motor for moving the protective cover back and forth.

6. A centrifugal casting machine for Babbitt alloys for plain bearings according to claim 1, characterized in that The output end of the variable frequency motor is fixedly connected with a small pulley, the end of the main shaft away from the first clamping plate is fixed with a large pulley, the small pulley and the large pulley are connected through a transmission belt, the variable frequency motor moves transversely, and is fixed again to adjust the distance between the large pulley and the small pulley.

7. A centrifugal casting machine for Babbitt alloys for plain bearings according to claim 1, characterized in that The rear frame is fixed with a rotational speed probe, and the rotational speed probe is used to measure the rotational speed of the main shaft.

8. A centrifugal casting machine for Babbitt alloys for plain bearings according to claim 1, characterized in that The hopper is made of stainless steel, and the contact position with the molten metal is polished.

9. A centrifugal casting machine for Babbitt alloys for plain bearings according to claim 1, characterized in that The hopper and the support guide rail are hingedly connected at the sliding connection.

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