Automatic air hole pricking device for core setting mould of sand core of engine cylinder body

Abstract

The utility model discloses an automatic air hole pricking device for a core setting mould of an engine cylinder block sand core, which relates to the technical field of casting and comprises a bottom plate, an automatic shuttling mechanism and a molding line, an air cylinder component is mounted above the bottom plate, a pricking plate is mounted at the output end of the air cylinder component, a pricking needle is mounted on the pricking plate, and the automatic shuttling mechanism is mounted on the molding line. The automatic air hole pricking device comprises a bottom plate, an automatic shuttling mechanism is arranged below the bottom plate, a part taking robot is arranged above the automatic shuttling mechanism, a molding line is arranged below the automatic air hole pricking device, and an automatic core hanging mechanism is arranged between the automatic shuttling mechanism and the molding line. The sand core air hole pricking and core setting actions are synchronously completed through signal induction, so that the air hole pricking efficiency is improved, the quality defect caused by missing pricking of an exhaust hole to a product is avoided, and meanwhile, the number of personnel required by air pricking work is reduced.

Description

An automatic air hole punching device for engine block sand core lower core die Technical Field

[0001] This utility model relates to the field of casting technology, specifically to an automatic air-punching device for an engine cylinder block sand core lower core die. Background Technology

[0002] Gray cast iron engine block castings typically employ an amine-method cold box resin sand core-making process and static pressure wet sand molding. Compared to other processes, this method offers advantages such as high production efficiency, short production cycle, and ease of mechanization and automation. However, the resin used to bind the sand core and the moisture in the molding sand evaporate during the pouring process, generating a large amount of gas. If this gas is not expelled from the mold before the molten iron solidifies, it will remain in the molten iron, causing porosity defects in the engine block casting. Currently, venting of the sand core usually relies on setting extraction pins on the mold, and after mold opening, venting channels are formed at corresponding positions on the sand core. To prevent the venting channels from being blocked by the coating during the sand core impregnation process, the common practice is to leave a certain layer of sand around the vent holes to prevent coating from entering. After the coating dries, the remaining sand layer is manually cleared to ensure unobstructed venting. The existing technology has the following problems:

[0003] Manually clearing vent holes has disadvantages such as long cycle time, easy leakage of vent holes, and the need for personnel to work on the production line. This results in low production line efficiency, product vent defects, and increased labor costs, causing losses to enterprises.

[0004] Therefore, we propose an automatic air hole punching device for engine cylinder block sand core lower core die to solve the problems of long cycle time, easy leakage of air holes, and the need for personnel to follow the line in the above-mentioned manual air hole clearing method, which leads to low production line efficiency, product air hole defects, and increased labor costs, causing losses to enterprises. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic air-hole punching device for the lower core die of an engine cylinder block sand core, so as to solve the problems currently on the market mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an automatic air-hole punching device for an engine cylinder block sand core lower core die, comprising a base plate, an automatic shuttle mechanism, and a molding line. A cylinder assembly is installed above the base plate, and a punching plate is installed at the output end of the cylinder assembly. Punching needles are installed on the punching plate. An automatic shuttle mechanism is provided below the base plate. A part-retrieving robot is provided above the automatic shuttle mechanism. A molding line is provided below the automatic air-hole punching device. An automatic core-lifting mechanism is provided between the automatic shuttle mechanism and the molding line.

[0007] Preferably, a lower core die is provided above the base plate, and a cylinder connecting rod is installed on the lower core die, which is connected to the cylinder assembly.

[0008] The above structural design ensures the stability of the cylinder assembly during operation, making the force transmission stable during the movement of the cylinder assembly driving the rolling plate. This, in turn, ensures that the piercing needles on the rolling plate can accurately penetrate the sand core exhaust hole, improving the piercing accuracy and stability.

[0009] Preferably, the cylinder assembly includes a cylinder body and a drive device, wherein the drive device is connected to the cylinder body and provides power to the cylinder body.

[0010] The above structural design enables the cylinder assembly to precisely drive the piercing plate, allowing the piercing plate to reciprocate according to preset requirements, completing the piercing and resetting actions. This is the core power source that ensures the smooth operation of the piercing operation and provides power guarantee for the stable operation of the device.

[0011] Preferably, the length and diameter of the needle are designed according to the depth and diameter of the exhaust hole in the engine block sand core.

[0012] The above structural design ensures that the puncture needle can be adapted to vent holes of different sizes, effectively clearing residual sand layers and avoiding incomplete clearing of vent holes or damage to the sand core due to improper needle size, thereby improving product quality and reducing porosity defects in castings.

[0013] Preferably, an air-filled plate limiting block is installed above the lower core die, and a needle plate guide shaft, a linear bearing, and a bearing seat are installed on the lower core die.

[0014] With the above structural design, the air-clamping plate limiting block restricts the range of motion of the cleaving plate, ensuring accurate cleaving depth and reset position; the needle plate guide shaft, linear bearing and bearing seat ensure smooth movement of the cleaving plate, improve the accuracy and stability of the cleaving operation, reduce cleaving plate movement deviation, and improve product quality and production stability.

[0015] Preferably, the air-clamping plate limiting block is fixedly connected to the lower core die, and the needle plate guide shaft is connected to the clamping plate through a linear bearing. The needle plate guide shaft, the linear bearing, and the bearing seat limit the clamping plate.

[0016] The above structural design further enhances the limiting effect of the piercing plate, ensuring that the piercing plate will not wobble or shift during movement, so that the piercing needle always maintains the accurate piercing position, improving the accuracy and reliability of piercing, and thus improving product quality.

[0017] Preferably, the part-picking robot, the automatic shuttle mechanism, the automatic core-lifting mechanism, and the molding line are all equipped with sensors, which are connected to the PLC controller.

[0018] By adopting the above structural design, the entire device can be automated. Each component works in coordination according to sensor signals and PLC controller instructions, which improves production efficiency, reduces manual intervention, lowers labor costs, avoids human error, and improves product quality and production stability.

[0019] Compared with the prior art, the beneficial effects of this utility model are: the automatic air hole punching device for the engine cylinder block sand core lower core die:

[0020] 1. By using signal sensing to synchronize the sand core puncturing and core setting actions, the efficiency of puncturing air holes is improved, quality defects caused by missed puncturing of air holes are avoided, and the number of personnel required for puncturing air holes is reduced.

[0021] 2. The length and diameter of the piercing needle are designed according to the depth and diameter of the exhaust hole of the engine cylinder block sand core. With the help of the piercing plate limit block, the piercing depth is precisely controlled to ensure that the exhaust hole can be effectively cleared, avoiding the porosity defects of the engine cylinder block casting caused by poor exhaust, thus improving product quality.

[0022] 3. The automated operation process reduces the reliance on manual unblocking of vents, eliminates the need for dedicated personnel to work on-site, lowers labor costs, and also reduces the workload of workers. Attached Figure Description

[0023] Figure 1 is a schematic diagram of the overall main structure of this utility model;

[0024] Figure 2 is a schematic side view of the overall structure of this utility model;

[0025] Figure 3 is a schematic diagram of the position and structure of the shuttle mechanism and the automatic core lifting mechanism of this utility model.

[0026] In the diagram: 1. Base plate; 2. Cylinder assembly; 3. Cylinder connecting rod; 4. Binding plate; 5. Binding plate limiting block; 6. Needle plate guide shaft; 7. Linear bearing; 8. Bearing seat; 9. Binding needle; 10. Picking robot; 11. Automatic shuttle mechanism; 12. Automatic core lifting mechanism; 13. Molding line. 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] Please refer to Figures 1-3. This utility model provides a technical solution: an automatic air-hole punching device for an engine cylinder block sand core lower core die, including a base plate 1, a cylinder assembly 2, a cylinder connecting rod 3, a punching plate 4, an air-hole punching plate limiting block 5, a needle plate guide shaft 6, a linear bearing 7, a bearing seat 8, a punching needle 9, a part-retrieving robot 10, an automatic shuttle mechanism 11, an automatic core-lifting mechanism 12, and a molding line 13. The cylinder assembly 2 is installed above the base plate 1, and the lower core die is set above the base plate 1. The cylinder connecting rod 3 is installed on the lower core die and connected to the cylinder assembly 2. During the process of the automatic shuttle mechanism 11 driving the sand core to move, the drive device of the cylinder assembly 2 receives a signal from the PLC controller. The cylinder body is driven to work, and the piston rod of the cylinder body extends, pushing the piercing plate 4 forward along the needle plate guide shaft 6 via the cylinder connecting rod 3. The cylinder assembly 2 includes a cylinder body and a drive device. The drive device is connected to the cylinder body and provides power to the cylinder body. After the piercing is completed, the drive device of the cylinder assembly 2 controls the piston rod of the cylinder body to retract, driving the piercing plate 4 and the piercing needle 9 to return to their original position along the needle plate guide shaft 6. The rear end limiting part of the piercing plate limiting block 5 restricts the return position of the piercing plate 4, ensuring that the piercing plate 4 returns to its initial position. The output end of the cylinder assembly 2 is equipped with the piercing plate 4, and the piercing needle 9 is installed on the piercing plate 4. The length and diameter of the piercing needle 9 are designed according to the depth and diameter of the exhaust hole of the engine cylinder block sand core. When the binding plate 4 moves, the needles 9 on the binding plate 4 move forward and penetrate into the vent holes of the sand core. A venting plate limiting block 5 is installed above the lower core fixture, and a needle plate guide shaft 6, a linear bearing 7, and a bearing seat 8 are installed on the lower core fixture. The front limiting part of the venting plate limiting block 5 restricts the movement of the binding plate 4, ensuring that the depth of the needles 9 penetrating the sand core meets the requirements, thereby clearing the residual sand layer in the vent holes. The venting plate limiting block 5 is fixedly connected to the lower core fixture. The needle plate guide shaft 6 is connected to the binding plate 4 through the linear bearing 7. The needle plate guide shaft 6, the linear bearing 7, and the bearing seat 8 limit the movement of the binding plate 4, allowing it to move smoothly under force, thus improving the stability of the binding plate 4 during movement. A self-priming device is installed below the base plate 1. The automatic shuttle mechanism 11 is equipped with a part-picking robot 10 above it and a molding line 13 below the automatic air-punching device. An automatic core-lifting mechanism 12 is located between the automatic shuttle mechanism 11 and the molding line 13. Sensors are installed on the part-picking robot 10, the automatic shuttle mechanism 11, the automatic core-lifting mechanism 12, and the molding line 13. The sensors are connected to a PLC controller. The sensors on the part-picking robot 10 detect the sand core transported by the overhead conveyor in the previous process and transmit the signal to the PLC controller connected to it. The PLC controller controls the movement of the part-picking robot 10 according to the preset program. The part-picking robot 10 accurately picks up the sand core and places it on the lower core fixture fixed to the automatic shuttle mechanism 11.

[0029] Signal sensing technology is an existing technology in this field, and its working principle will not be elaborated here. It ensures that the coordinated work between the components is accurate and error-free. The PLC controller accurately controls the action sequence and timing of each component based on the signals transmitted by the sensors, so that the entire device can operate efficiently and stably.

[0030] Working principle: When using the automatic air hole punching device of the engine block sand core lower core die, firstly, the sensor on the picking robot 10 senses the sand core transported by the overhead conveyor in the previous process and transmits the signal to the PLC controller connected to it. The PLC controller controls the action of the picking robot 10 according to the preset program. The picking robot 10 accurately grabs the sand core and places it on the lower core die fixed to the automatic shuttle mechanism 11.

[0031] The sensor on the automatic shuttle mechanism 11 detects that the sand core has been placed in place and sends a signal to the PLC controller. The PLC controller controls the automatic shuttle mechanism 11 to start, moving the lower core jig carrying the sand core from the sand core placement station to the lower core lifting station. During the movement of the sand core by the automatic shuttle mechanism 11, the drive device of the cylinder assembly 2 receives the signal from the PLC controller and drives the cylinder body to work. The piston rod of the cylinder body extends and pushes the binding plate 4 forward along the needle plate guide shaft 6 through the cylinder connecting rod 3. The needle plate guide shaft 6, linear bearing 7 and bearing seat 8 limit the binding plate 4, allowing the binding plate 4 to move forward smoothly. The needles 9 on the binding plate 4 move forward accordingly and insert into the vent hole of the sand core. The front end of the vent plate limiting block 5 restricts the movement of the binding plate 4, ensuring that the depth of the needles 9 into the sand core meets the requirements, thereby clearing the residual sand layer in the vent hole.

[0032] After the puncture is completed, the drive device of cylinder assembly 2 controls the piston rod of the cylinder body to retract, driving the puncture plate 4 and the puncture needle 9 to return to their original position along the needle plate guide shaft 6. The rear end limiting part of the puncture plate limiting block 5 restricts the return position of the puncture plate 4, ensuring that the puncture plate 4 returns to its initial position.

[0033] Sensors on the automatic core-lifting mechanism 12 detect that the sand core has completed piercing and reached the core-retrieving station, transmitting a signal to the PLC controller. The PLC controller controls the automatic core-lifting mechanism 12 to operate, grabbing the sand core that has passed through the pierced air hole and moving it to the core-lowering station of the molding line 13, lowering the sand core into the molding line 13. Subsequently, the automatic core-lifting mechanism 12 returns to the core-retrieval station. Sensors on the molding line 13 detect that the sand core has been lowered and send a signal back to the PLC controller. The PLC controller controls the molding line 13 to move forward one station, and this cycle repeats, realizing the automatic piercing of the exhaust hole of the engine block sand core and the core-lowering operation, thus completing a series of tasks. Content not described in detail in this specification belongs to prior art known to those skilled in the art.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic air-hole punching device for an engine cylinder block sand core lower core die, comprising a base plate (1), an automatic shuttle mechanism (11), and a molding line (13), characterized in that: A cylinder assembly (2) is installed above the base plate (1), and a snagging plate (4) is installed at the output end of the cylinder assembly (2). A snagging needle (9) is installed on the snagging plate (4). An automatic shuttle mechanism (11) is provided below the base plate (1). A part-retrieving robot (10) is provided above the automatic shuttle mechanism (11). A shaping line (13) is provided below the automatic air-punching device. An automatic core-lifting mechanism (12) is provided between the automatic shuttle mechanism (11) and the shaping line (13).

2. The automatic air-hole punching device for the engine cylinder block sand core lower core die according to claim 1, characterized in that: A lower core die is provided above the base plate (1), and a cylinder connecting rod (3) is installed on the lower core die. The cylinder connecting rod (3) is connected to the cylinder assembly (2).

3. The automatic pinning device of claim 2, wherein: The cylinder assembly (2) includes a cylinder body and a drive device, the drive device being connected to the cylinder body and providing power to the cylinder body.

4. The automatic pinning device of claim 3, wherein: The length and diameter of the needle (9) are designed according to the depth and diameter of the exhaust hole of the engine block sand core.

5. The automatic pinning device of claim 1, wherein: The lower core die is equipped with an air-filled plate limiting block (5) above it, and a needle plate guide shaft (6), a linear bearing (7), and a bearing seat (8) are installed on the lower core die.

6. The automatic air-hole punching device for the engine cylinder block sand core lower core die according to claim 5, characterized in that: The air-clamping plate limiting block (5) is fixedly connected to the lower core die, and the needle plate guide shaft (6) is connected to the clamping plate (4) through the linear bearing (7). The needle plate guide shaft (6), the linear bearing (7) and the bearing seat (8) limit the clamping plate (4).

7. The automatic pinning device of claim 1, wherein: Sensors are installed on the picking robot (10), automatic shuttle mechanism (11), automatic core lifting mechanism (12) and molding line (13), and the sensors are connected to the PLC controller.

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