Pneumatic impact hammer for casting sprues

Abstract

The utility model discloses castings pouring riser pneumatic impact hammer relates to impact hammer technical field, including gas tank, air pump, hammering shell and auxiliary air pump, one side of gas tank is equipped with air pump, air pump is linked with gas tank through first air pipe, the inside fixedly connected with impact hammer body of hammering shell, gas tank is linked with impact hammer body through second air pipe, one end of second air pipe is equipped with auxiliary air pump, one end of second air pipe is equipped with opening and is fixedly connected with sealing pipe, the inner wall of sealing pipe is opened in recess and is slidably connected with sliding block, one end inner wall of sliding block is fixedly connected with connecting block, and the connecting block extends to second air pipe and is fixedly connected with sealing block, and the automatic start emergency air supplement of pneumatic shortage can be realized without manual intervention, avoid the operation interruption, and through the adjustment spring pre-tightening force, the gas pressure trigger threshold value can be set flexibly, and the demand of different castings operation to gas pressure stability is satisfied.

Description

Technical Field

[0001] This utility model relates to the field of impact hammer technology, specifically a pneumatic impact hammer for casting risers. Background Technology

[0002] In casting production, cleaning the gating system is a crucial step in ensuring casting accuracy and subsequent processing quality. As structures used for feeding and venting during casting, the gating system needs to be separated from the casting body after molding. Pneumatic impact hammers, with their high efficiency and portability, have become the mainstream equipment for cleaning gating systems in small and medium-sized castings. Their working principle involves using compressed air to drive the hammer head in high-frequency impacts, using the impact force to break the connection between the gating system and the casting body, achieving rapid separation. The power system of a pneumatic impact hammer for casting gating systems typically consists of an air pump, an air tank, and air pipes. The air pump continuously generates compressed air and stores it in the air tank, which supplies air to the impact hammer body through the air pipes, driving the hammer head to operate.

[0003] However, the main air source in the foundry often needs to supply air to multiple pieces of equipment such as sand molding machines and pneumatic fixtures at the same time. When using air, the air pressure will fluctuate with the amount of equipment used. Pneumatic impact hammers have high requirements for air pressure stability. Insufficient air pressure will directly lead to a decrease in impact force, making it impossible to effectively separate the gating and riser, or even causing jamming due to the lack of hammer power, thus reducing work efficiency. Therefore, it is necessary to propose a pneumatic impact hammer for casting gating and riser. Utility Model Content

[0004] The purpose of this invention is to provide a pneumatic impact hammer for casting risers and gating systems to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pneumatic impact hammer for casting risers, comprising an air tank, an air pump, a hammer housing, and an auxiliary air pump. The air pump is provided on one side of the air tank, and the air pump is connected to the air tank through a first air pipe. An impact hammer body is fixedly connected inside the hammer housing. The air tank is connected to the impact hammer body through a second air pipe, and an auxiliary air pump is provided at one end of the second air pipe. The second air tube has an opening at one end and is fixedly connected to a sealing tube. The inner wall of the sealing tube has a groove and is slidably connected to a slider. The inner wall of one end of the slider is fixedly connected to a connecting block. The connecting block extends into the second air tube and is fixedly connected to a sealing block. The inner wall of the sealing tube is slidably connected to a squeezing block. The end of the sealing tube located at the sealing block is fixedly connected to a pressure detector. The pressure detector is electrically connected to an auxiliary air pump.

[0006] Preferably, one end of the sealing tube is provided with an air hole and is fixedly connected to a third air pipe, which is fixedly connected to an auxiliary air pump.

[0007] Preferably, the slider and the outer wall of one end of the extrusion block are both fixedly connected to a spring.

[0008] Preferably, one end of the extrusion block is rotatably connected to a threaded rod, which passes through a threaded hole to the outside of the sealing tube and is provided with a handle.

[0009] Preferably, a sealing ring is fixedly connected to the outer wall of the extrusion block.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: the air pump introduces air into the first air pipe, the first air pipe forces the air into the impact hammer to impact the casting. When the air pressure in the first air pipe is low, the sealing block separates from the first air pipe. The auxiliary air pump introduces air into the first air pipe through the sealing pipe to replenish the air pressure in the first air pipe. The handle can be used to drive the threaded rod to rotate, and the threaded rod drives the extrusion block to move. The pressure of the sealing block can be adjusted by adjusting the elasticity of the spring. Through the air pressure detector and the auxiliary air pump, emergency air replenishment can be automatically started when the air pressure is insufficient without manual intervention, avoiding operation interruption. At the same time, by adjusting the spring preload, the air pressure trigger threshold can be flexibly set to meet the air pressure stability requirements of different casting operations. Attached Figure Description

[0011] Figure 1 This is a front view structural diagram of the present utility model; Figure 2 This is a schematic diagram of the installation position of the sealing tube of this utility model; Figure 3 This is a schematic diagram of the moving structure of the sealing block of this utility model; Figure 4 This is a cross-sectional view of the sealing tube of this utility model.

[0012] In the diagram: 1. Air tank; 2. Air pump; 3. Hammer housing; 4. Auxiliary air pump; 5. Impact hammer body; 6. Sealing tube; 7. Slider; 8. Connecting block; 9. Sealing block; 10. Extrusion block; 11. Air pressure detector; 12. Spring; 13. Threaded rod. Detailed Implementation

[0013] Please see Figure 1-4 This utility model provides a technical solution: Example 1: A pneumatic impact hammer for casting risers, including an air tank 1, an air pump 2, a hammer housing 3 and an auxiliary air pump 4. The air pump 2 is provided on one side of the air tank 1. The air pump 2 is connected to the air tank 1 through a first air pipe. The hammer body 5 is fixedly connected inside the hammer housing 3. The air tank 1 is connected to the hammer body 5 through a second air pipe. The auxiliary air pump 4 is provided at one end of the second air pipe. One end of the second air tube has an opening and is fixedly connected to a sealing tube 6. The inner wall of the sealing tube 6 has a groove through which a slider 7 is slidably connected. One end of the slider 7 is fixedly connected to a connecting block 8. The connecting block 8 extends into the second air tube and is fixedly connected to a sealing block 9. The inner wall of the sealing tube 6 is slidably connected to a squeezing block 10. One end of the sealing tube 6 located at the sealing block 9 is fixedly connected to a pressure detector 11. The pressure detector 11 is electrically connected to the auxiliary air pump 4. The pressure detector model is BME280.

[0014] In use, air pump 2, auxiliary air pump 4, and air pressure detector 11 are connected to an external drive source via a controller; In normal operation, the main air source is stable. Air pump 2 fills air tank 1 with air. Compressed air enters the impact hammer body 5 through the second air pipe, driving the hammer head to impact the riser. The air pressure in the second air pipe acts on the sealing block 9, overcoming the elastic force of spring 12. The air pressure pushes the sealing block 9 to press the opening of the second air pipe and compresses spring 12 to achieve a seal. At this time, the auxiliary air pump 4 is in standby mode, and the air pressure detector 11 monitors the air pressure in the sealing pipe 6 in real time. If the air pump 2 malfunctions or the air pipe leaks, resulting in insufficient air pressure, the air pressure in the second air pipe will drop. The air pressure in the second air pipe is insufficient to overcome the elastic force of the spring 12. The spring pushes the slider 7 to move away from the squeezing block 10. The slider 7 drives the sealing block 9 to disengage from the opening through the connecting block 8, so that the opening is opened. The air pressure detector 11 detects the low pressure signal and immediately triggers the auxiliary air pump 4 to start. The compressed air generated by the auxiliary air pump 4 enters the sealing pipe 6 through the third air pipe and enters the second air pipe through the opening to supplement the air pressure until the operator repairs the air pump 2 and the main air source is restored. Under the action of air pressure, the sealing block 9 re-seals the opening and the auxiliary air pump 4 automatically stops. If higher impact force is required to process castings of different materials, the air pressure trigger threshold needs to be increased. Rotating the handle of the threaded rod 13 pushes the extrusion block 10 towards the slider 7, increasing the pre-compression of the spring 12, thereby increasing the critical air pressure value for opening the sealing block 9 to meet high working pressure requirements. Conversely, the threaded rod 13 moves the extrusion block away from the slider 7, reducing the pre-compression of the spring 12, thereby reducing the critical air pressure value for opening the sealing block 9 to meet low working pressure requirements.

[0015] Example 2: The technical solutions in this example that differ from Example 1 include; One end of the sealing tube 6 is provided with an air hole and is fixedly connected to a third air pipe. The third air pipe is fixedly connected to the auxiliary air pump 4. When the sealing block 9 opens the opening of the second air pipe, the gas generated by the auxiliary air pump 4 can enter the second air pipe through the third air pipe. The slider 7 and the outer wall of one end of the extrusion block 10 are fixedly connected to a spring 12. When the spring 12 is in the relaxed state, the spring 12 pushes the slider 7 away from the extrusion block 10, thereby driving the sealing block 9 to move towards the opening of the second air pipe and open the opening. When the air pressure in the second air pipe is sufficient, the air pressure thrust overcomes the elastic force of the spring 12 and pushes the sealing block 9 to press the opening to achieve a seal. One end of the extrusion block 10 is rotatably connected to a threaded rod 13. The threaded rod 13 passes through the threaded hole to the outside of the sealing tube 6 and is provided with a handle. By rotating the handle, the position of the extrusion block 10 in the sealing tube 6 can be adjusted, thereby changing the preload of the spring 12 and realizing the adjustment of the air pressure trigger threshold. The outer wall of the extrusion block 10 is fixedly connected to a sealing ring to enhance the sealing performance between the sealing block 9 and the opening and prevent the gas in the second air pipe from leaking from the opening.

Claims

1. A pneumatic impact hammer for casting risers, comprising an air tank (1), an air pump (2), a hammer housing (3), and an auxiliary air pump (4). The air pump (2) is provided on one side of the air tank (1), and the air pump (2) is connected to the air tank (1) through a first air pipe. The hammer housing (3) is fixedly connected to the hammer body (5). The air tank (1) is connected to the hammer body (5) through a second air pipe, and an auxiliary air pump (4) is provided at one end of the second air pipe. Its features are, The second air tube has an opening at one end and is fixedly connected to a sealing tube (6). The inner wall of the sealing tube (6) has a groove and is slidably connected to a slider (7). The inner wall of one end of the slider (7) is fixedly connected to a connecting block (8). The connecting block (8) extends into the second air tube and is fixedly connected to a sealing block (9). The inner wall of the sealing tube (6) is slidably connected to a squeezing block (10). The end of the sealing tube (6) located at the sealing block (9) is fixedly connected to a pressure detector (11). The pressure detector (11) is electrically connected to an auxiliary air pump (4).

2. The pneumatic impact hammer for casting risers according to claim 1, characterized in that: One end of the sealing tube (6) is provided with an air hole and is fixedly connected to a third air pipe, which is fixedly connected to the auxiliary air pump (4).

3. The pneumatic impact hammer for casting risers and gating systems according to claim 1, characterized in that: The slider (7) and the outer wall of one end of the extrusion block (10) are both fixedly connected to a spring (12).

4. The pneumatic impact hammer for casting risers and gating systems according to claim 1, characterized in that: One end of the extrusion block (10) is rotatably connected to a threaded rod (13), which passes through a threaded hole to the outside of the sealing tube (6) and is provided with a handle.

5. The pneumatic impact hammer for casting risers according to claim 1, characterized in that: A sealing ring is fixedly connected to the outer wall of the extrusion block (10).

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