A semi-enclosed internal cleaning device and method for castings

Abstract

This invention relates to a device and method for cleaning the interior of semi-enclosed castings, belonging to the field of casting technology, and solves the problem of the difficulty in cleaning the graphite mold inside semi-enclosed castings in the prior art. The invention includes a pneumatic pick and a dust collection device; the pneumatic pick includes a first cutter, a drive structure, and a pick chisel; the first cutter performs reciprocating linear and rotary motions under the drive structure to break the graphite mold inside the casting; the pick chisel connects the first cutter and the drive structure; the dust collection device collects dust generated during the operation of the pneumatic pick. This invention achieves high efficiency in cleaning the graphite mold inside semi-enclosed castings.

Description

Technical Field

[0001] This invention relates to the field of casting technology, and in particular to a device and method for cleaning the interior of a semi-enclosed casting. Background Technology

[0002] Titanium alloy castings are widely used in aerospace, shipbuilding, and other fields due to their excellent room temperature and high temperature strength, thermal stability, and weldability. For titanium alloy castings with semi-enclosed complex internal cavity structures or small-sized flow channel structures, the main casting processes used are machined graphite mold casting and investment casting. After casting, the internal graphite mold needs to be cleaned. Since both graphite and the investment mold shell have a certain strength, the cleaning is relatively difficult. Summary of the Invention

[0003] Based on the above analysis, the present invention aims to provide a device and method for cleaning the interior of semi-enclosed castings, in order to solve the problem of the difficulty in cleaning the graphite mold inside semi-enclosed castings.

[0004] The objective of this invention is mainly achieved through the following technical solutions:

[0005] The present invention provides a semi-enclosed internal cleaning device for castings, including a pneumatic pick and a dust collection device;

[0006] The pneumatic pick includes a first cutting tool, a drive structure, and a pick chisel;

[0007] The first cutting tool performs reciprocating linear and rotary motions under the drive structure to break the graphite mold inside the casting;

[0008] The pick is used to connect the first cutting tool and the drive structure;

[0009] The dust collection device is used to collect the dust generated during the operation of the pneumatic pick.

[0010] Furthermore, the first cutting tool has a spiral blade structure.

[0011] Furthermore, the pneumatic pick also includes a spring disposed on the upper part of the first cutter, the spring being used to adjust the extension length and angle of the first cutter.

[0012] Furthermore, the dust collection device is mounted on the pick; the dust collection device includes a baffle cover, a vacuum cleaner, a suction pipe, and a dust collection hopper.

[0013] Furthermore, the partition cover is configured as an umbrella-shaped structure.

[0014] Furthermore, the suction pipe connects the vacuum cleaner and the dust collection hopper.

[0015] Furthermore, a venturi tube and a conical disc are provided inside the suction pipe.

[0016] Furthermore, the conical disc is mounted at the lower center of the contraction section of the venturi tube via a fixing bracket.

[0017] Furthermore, the first tool has micropores on its cutting edge for heat dissipation.

[0018] In another aspect, the present invention provides a method for cleaning the interior of a semi-enclosed casting, which is used in the aforementioned semi-enclosed casting interior cleaning device.

[0019] Furthermore, the pneumatic pick is also equipped with a second cutter; the second cutter has a disc structure and includes a bottom, a center part, a cutting part, and an edge part;

[0020] Furthermore, the cutting portion is disposed between the center portion and the edge portion, and the cutting portion is uniformly arranged circumferentially along the axis of the second tool; the length direction of the cutting portion is the radial direction of the second tool.

[0021] Furthermore, the cutting portion has a serrated structure.

[0022] Furthermore, the cutting section includes a coarse crushing zone and a fine crushing zone; the saw teeth in the coarse crushing zone are larger than the saw teeth in the fine crushing zone, and the saw tooth spacing in the coarse crushing zone is larger than the saw tooth spacing in the fine crushing zone.

[0023] Furthermore, the plane between the saw teeth is parallel to the bottom upper surface of the second cutter; the angle between one side of the saw tooth and the bottom upper surface is A, and the angle between the other side of the saw tooth and the bottom upper surface is B, then: 135° < A < 145°, 60° < B < 75°.

[0024] Furthermore, the second tool includes a cutting section angle adjustment structure, which is used to adjust the tilt angle of the cutting section.

[0025] Furthermore, the cutting section angle adjustment structure includes an adjustment plate and an adjustment groove; the adjustment plate is disposed at both ends of the cutting section; one end of the adjustment plate is fixed to the cutting section, and the other end of the adjustment plate is connected to the center section or the edge section; the adjustment groove is disposed at the center section and the edge section.

[0026] Furthermore, the adjusting plate is provided with a through hole, which corresponds to the adjusting groove. Bolts can be inserted into the adjusting groove and the through hole to fix the tilt angle of the cutting part.

[0027] Furthermore, the pneumatic pick also includes a third blade; the third blade is disposed at the vacuum cleaner inlet and is used to crush the graphite block sucked into the vacuum cleaner inlet.

[0028] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0029] (1) The casting cleaning device in this invention uses a pneumatic pick, which has reciprocating and rotary motion functions, ensuring that the pick head continuously breaks the mold in the closed position and carries part of the mold out of the closed position with the movement of the pick head, avoiding the cleaning device from being overloaded due to blockage caused by broken mold. A dust collection device is set on the pick's chisel to collect dust when the pneumatic pick is working, reducing the risk of workers inhaling dust.

[0030] (2) Compared with the prior art, the present invention sets the impact head of the jackhammer to be a spiral blade structure. Utilizing the characteristics of the spiral, the spiral blade can gradually roll into and break the graphite mold when rotating, and at the same time generate a certain axial thrust to facilitate the smooth discharge of graphite and avoid accumulation in the crushing area.

[0031] (3) The present invention has a spring installed on the upper part of the first cutter. On the one hand, the spring can automatically adjust the extension length and angle of the first cutter to ensure that the first cutter always maintains good contact with the graphite mold, and ensure that the impact force can be effectively transmitted to the graphite, thereby improving the crushing efficiency and the working flexibility of the pneumatic pick; on the other hand, since the pneumatic pick will generate high-frequency impact action when it is working, the spring can effectively buffer the impact force of the pneumatic pick, reducing the vibration of the overall structure of the pneumatic pick and the operator's arm.

[0032] (4) In this invention, the baffle is set as an umbrella-shaped structure, which can effectively cover the area where dust is generated when the pneumatic pick is working, intercept the dust in multiple directions, and reduce the dust from dispersing into the surrounding space; the blade is provided with micropores, which form airflow channels during the graphite crushing process; when the blade is working at high speed, the air flows through the micropores, which cools the blade and blows away the graphite dust, reduces the adhesion of graphite dust on the blade surface, and improves the heat dissipation performance and working stability of the blade.

[0033] (5) Compared with the prior art, the present invention sets up a combination structure of Venturi tube and conical disk in the dust suction pipe, which utilizes the Venturi effect to increase the flow rate of dust and accelerate the speed at which dust enters the dust collection hopper; the Venturi tube and conical disk form a low-pressure zone, which allows dust to be sucked in faster and improves the dust capture efficiency.

[0034] (6) Compared with the prior art, the present invention has a second cutter provided above the first cutter to assist the first cutter in cutting the graphite mold. In view of the slippery nature of graphite, the second cutter in the present invention is set as serrated to prevent graphite from sliding on the cutting surface and improve the cutting accuracy of the graphite mold.

[0035] (7) Compared with the prior art, the present invention sets the saw teeth near the edge of the cutting part of the second cutter to be larger than the saw teeth near the center, and the saw teeth spacing near the edge is larger than the saw teeth spacing near the center, so as to use the saw teeth near the edge to coarsely crush the graphite and the saw teeth near the center to finely crush the graphite blocks, thereby improving the efficiency of the entire crushing process; In view of the soft characteristics of the graphite mold, the tooth structure and horizontal inclination angle are set as A on one side and B on the other side, 135° < A < 145° to ensure that the saw teeth have sufficient strength to withstand the force in the process of cutting graphite, while also facilitating the smooth discharge of the crushed graphite chips; 60° < B < 75°, so that the saw teeth can initially insert into the large graphite blocks and avoid slippage due to excessively sharp angles. The saw teeth can cut into the edge of the graphite well and generate appropriate crushing force inside the graphite.

[0036] (8) The present invention is provided with a cutting section angle adjustment structure, including an adjustment groove and an adjustment plate. Bolts are inserted into the through hole of the adjustment plate and the adjustment groove to change the inclination angle of the cutting section in real time. A smaller cutting section inclination angle is used in the initial crushing stage of graphite in order to quickly cut into the graphite; after the graphite is initially crushed, the cutting section inclination angle is increased to enhance the tearing and crushing effect.

[0037] (9) Compared with the prior art, the present invention provides a third blade at the vacuum cleaner inlet. Driven by the power of the jackhammer, the third blade rotates, thereby breaking the sputtered and sucked graphite blocks into smaller graphite blocks, thus avoiding clogging of the dust collection device.

[0038] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the specification or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained from the content specifically pointed out in the text and accompanying drawings. Attached Figure Description

[0039] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0040] Figure 1 This is a schematic diagram of the cleaning device in Example 1;

[0041] Figure 2 This is a schematic diagram of the cleaning device in Example 2;

[0042] Figure 3 This is a schematic diagram of the structure of the second cutting tool in Example 2;

[0043] Figure 4 This is a schematic diagram of the structure of the second cutting tool tooth in Example 2;

[0044] Figure 5 This is a schematic diagram of the internal structure of the suction pipe in Example 2;

[0045] Figure 6 This is a schematic diagram of the cleaning device in Example 3;

[0046] Figure 7 This is a schematic diagram of the installation structure of the third tool in Example 3;

[0047] Figure 8 This is a schematic diagram of the structure of the third cutting tool in Example 3.

[0048] Figure label:

[0049] 1-Pneumatic pick, 11-First cutter, 12-Spring, 13-Drive structure, 14-Hick bar, 15-Second cutter, 151-Center, 152-Edge, 153-Cutting section, 154-Bottom, 155-Cutting section angle adjustment structure, 1551-Adjusting plate, 1552-Adjusting groove, 16-Third cutter, 161-Limiting post, 162-Drive ring, 163-Connecting post, 164-Blade, 165-Drive gear, 166-Drive rod, 2-Dust collection device, 21-Baffle cover, 22-Vacuum cleaner, 23-Suction pipe, 231-Venturi tube, 232-Conical disc, 24-Dust collection hopper. Detailed Implementation

[0050] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0051] Example 1

[0052] A specific embodiment of the present invention, such as Figure 1 As shown, a semi-enclosed casting internal cleaning device is disclosed, which is used to clean the graphite mold inside a semi-enclosed titanium alloy casting after casting is completed, including a pneumatic pick 1 and a dust collection device 2.

[0053] The pneumatic pick 1 includes a first cutter 11, a drive structure 13, and a pick chisel 14. The drive structure 13 of the pneumatic pick 1 is connected to a power source and compressed air to provide power for the cleaning operation. The pneumatic pick 1 has reciprocating and rotary motion functions, ensuring that the pick head continuously breaks the mold in the closed position and carries part of the mold out of the closed position with the movement of the pick head, avoiding the cleaning device from being overloaded due to blockage caused by broken mold.

[0054] The pick 14 is used to connect the drive structure 13 and the first cutting tool 11.

[0055] The first cutter 11 is the impact head of the pneumatic pick 1, which performs reciprocating linear and rotary motions under the drive structure 13 of the pneumatic pick 1 to break the graphite mold inside the casting. In this embodiment, the first cutter 11 has a spiral blade structure with sharp blade-like structures, which can break the graphite mold.

[0056] Compared with the prior art, this embodiment sets the impact head of the pneumatic pick 1 to a spiral blade structure. Utilizing the characteristics of the spiral, the spiral blade can gradually engulf and crush the graphite mold when rotating, while generating a certain axial thrust to facilitate the smooth discharge of graphite and avoid accumulation in the crushing area.

[0057] Furthermore, to enable the first cutter 11 to clean the graphite mold inside the casting from multiple angles and enhance the cleaning effect, this embodiment provides a spring 12 on the upper part of the first cutter 11, with the other end of the spring 12 connected to the pick 14. On the one hand, the spring 12 can automatically adjust the extension length and angle of the first cutter 11, ensuring that the first cutter 11 always maintains good contact with the graphite mold, ensuring that the impact force can be effectively transmitted to the graphite, improving the crushing efficiency and the working flexibility of the pneumatic pick 1; on the other hand, since the pneumatic pick 1 generates high-frequency impact actions during operation, the spring 12 can effectively buffer the impact force of the pneumatic pick 1, reducing vibration to the overall structure of the pneumatic pick 1 and the operator's arm.

[0058] The first cutting tool 11 and the pick 14 are made of carbon steel, which has a much higher strength than graphite and can clean and break the mold structure. However, its hardness is lower than that of titanium alloy and will not damage titanium alloy products.

[0059] The dust collection device 2 is installed on the chisel 14 of the pneumatic hammer 1 to collect dust when the pneumatic hammer 1 is working, thereby reducing the risk of workers inhaling dust.

[0060] The dust collection device 2 includes a baffle 21, a vacuum cleaner 22, a suction pipe 23, and a dust collection hopper 24.

[0061] During the crushing operation of the pneumatic pick 1, dust will spread in all directions. In this embodiment, the baffle 21 is set at the semi-enclosed position of the casting and is connected to the pick 14 by threads. The baffle 21 is set as an umbrella-shaped structure, which can effectively cover the area where dust is generated when the pneumatic pick 1 is working, intercepting dust in multiple directions and reducing the dispersion of dust into the surrounding space.

[0062] A vacuum cleaner 22 is installed at the bottom 154 of the baffle 21 to suck the dust collected at the baffle 21 into the suction pipe 23. The suction pipe 23 is located at the rear of the vacuum cleaner 22 and connects to the dust collection hopper 24. The suction pipe 23 transports the dust sucked in by the vacuum cleaner 22 to the dust collection hopper 24 for collection.

[0063] Example 2

[0064] To improve the cutting efficiency of the pneumatic pick 1 on the graphite mold, this embodiment is an improvement on embodiment 1, such as... Figure 2 As shown, a second tool 15 is provided above the first tool 11.

[0065] like Figure 3 As shown, the second cutter 15 is configured as a disc-shaped structure to assist the first cutter 11 in cutting the graphite mold. The second cutter 15 includes a bottom 154, a center portion 151, a cutting portion 153, and an edge portion 152. The center portion 151 is used to connect with the chisel 14 on the upper part of the first cutter 11, so that the second cutter 15 rotates as the chisel 14 rotates. The edge portion 152 is the circumferential edge of the disc-shaped structure.

[0066] A cutting portion 153 is provided between the center portion 151 and the edge portion 152, and is arranged circumferentially with the central axis of the second tool 15 as the center. The length direction of the cutting portion 153 is the radial direction of the disc structure, and extends from the center portion 151 to the edge portion 152.

[0067] It should be noted that, in order to enable the second cutter 15 to obtain greater centrifugal force during rotation and to enable the graphite mold being cut to move automatically towards the edge, the height of the cutting part 153 is set to gradually increase from the center part 151 to the edge part 152.

[0068] Considering the tendency of graphite to slide, in order to enable the cutting part of the second cutter 15 to more effectively cut and break the graphite mold when rotating, thereby improving the cutting efficiency of the pneumatic pick 1, the cutting part of the second cutter 15 in this embodiment is configured with a serrated structure. The serrated structure can increase the contact points between the cutter and the graphite and the points of application of the cutting force. During cutting, it can hold the graphite material in place, making it difficult for it to slide, thus making the graphite easier to break. Furthermore, it can effectively reduce the clogging and adhesion of graphite during the cutting process.

[0069] Compared to existing technologies, this embodiment features a second cutter 15 positioned above the first cutter 11 to assist the first cutter 11 in cutting the graphite mold. To address the slippery nature of graphite, the second cutter 15 in this embodiment is serrated to prevent the graphite from sliding on the cutting surface, thereby improving the cutting accuracy of the graphite mold.

[0070] Furthermore, in order to effectively crush the graphite and improve cutting efficiency, this embodiment divides the cutting section 153 into a coarse crushing zone and a fine crushing zone. The saw teeth in the coarse crushing zone are larger than those in the fine crushing zone, and the spacing between the saw teeth in the coarse crushing zone is larger than that in the fine crushing zone.

[0071] The coarse crushing zone is used to cut large pieces of graphite into smaller pieces, while the fine crushing zone is used to further break up the graphite into smaller fragments for easy discharge from the semi-closed end. Since the near-edge area of ​​the cutting section 153 facilitates initial processing of the graphite mold, the area near the edge 152 of the cutting section 153 is designated as the coarse crushing zone. The saw teeth are coarse in shape and sparsely spaced to provide sufficient strength to withstand significant impact and pressure during coarse cutting, while also allowing the graphite fragments to smoothly enter the fine crushing zone for further processing. The remaining areas of the cutting section 153 are fine crushing zones, where the saw teeth are smaller than those in the coarse crushing zone and slightly denser, allowing for more precise cutting of the fragments.

[0072] The plane between the serrations in the second cutter 15 is parallel to the upper surface, i.e., the bottom surface, of the bottom 154 of the disc-shaped structure. The tooth structure of the second cutter 15 is as follows: Figure 4 As shown, the angle between one side and the plane between the saw teeth is A, and the angle between the other side and the plane between the saw teeth is B. Since graphite is relatively soft and has a certain degree of slipperiness, in order to ensure that the saw teeth can initially insert into the large graphite block and to avoid slippage due to excessively sharp angles, the angle B of the saw teeth is set to 60° < B < 75°, so that the saw teeth can cut into the edge of the graphite better and generate appropriate crushing force inside the graphite.

[0073] Graphite is a soft material. If the angle A is too small, the saw teeth will lack strength and be easily damaged; if A is too large, chip removal will be obstructed, affecting the crushing effect. In this embodiment, the angle is set to 135° < A < 145° to ensure that the saw teeth have sufficient strength to withstand the forces during the graphite cutting process, while also facilitating the smooth discharge of the crushed graphite chips. During the cutting process, the graphite chips can slide smoothly along the rear surface of the saw teeth, preventing them from accumulating on the saw teeth and thus ensuring a continuous crushing process.

[0074] Compared to existing technologies, this embodiment features a second cutter 15 whose cutting section 153 has serrations that decrease in size and density from the edge to near the center. This allows for coarse crushing of the graphite using the serrations at the edge and fine crushing using the serrations near the center, improving the efficiency of the entire crushing process. Considering the soft nature of the graphite mold, the tooth structure and horizontal inclination are set as follows: one side is A, the other is B, 135° < A < 145° ensures the serrations have sufficient strength to withstand the force during graphite cutting, while also facilitating the smooth discharge of crushed graphite chips; 60° < B < 75° ensures the serrations can initially penetrate large pieces of graphite without slipping due to excessively sharp angles. The serrations can effectively cut into the edges of the graphite, generating appropriate crushing force within the graphite.

[0075] Furthermore, to enable the cutting section of the second cutter 15 to adapt to graphite molds at different crushing stages, this embodiment is provided with a cutting section angle adjustment structure 155 to change the tilt angle of the cutting section in real time. A smaller cutting section tilt angle is used in the initial crushing stage of graphite to quickly cut into the graphite; after the graphite is initially crushed, the angle is increased to enhance the tearing and pulverizing effect.

[0076] The cutting section angle adjustment structure 155 includes an adjustment plate 1551 and an adjustment groove 1552. The adjustment plate 1551 is disposed at both ends of the cutting section 153. The adjustment plate 1551 is an L-shaped plate, with one end fixed to the cutting section 153 and the other end connected to the center part 151 and the edge part 152 of the disc-shaped structure. The center part 151 and the edge part 152 of the disc-shaped structure are provided with adjustment grooves 1552, and the adjustment plate 1551 is provided with through holes. The adjustment grooves 1552 and the through holes correspond to each other, and bolts can be inserted into the adjustment grooves 1552 and the through holes to position the angle of the adjustment plate 1551 and the cutting section.

[0077] Compared to existing technologies, this embodiment features a cutting section angle adjustment structure 155, used to adjust the tilt angle of the cutting section to adapt to different states of the graphite mold at different crushing stages. A smaller cutting section tilt angle is used in the initial crushing stage of the graphite to quickly cut into it; after the graphite is initially crushed, the angle is increased to enhance the tearing and pulverizing effect.

[0078] Furthermore, since the heat generated by the cutting tool is not easily dissipated within a semi-enclosed container, affecting the tool's service life, this embodiment provides micropores on the cutting edges of the first tool 11 and the second tool 15. During the graphite crushing process, the micropores form airflow channels. When the tool rotates at high speed, the airflow through the micropores cools the tool and disperses graphite dust, reducing the adhesion of graphite dust to the tool surface and improving the tool's heat dissipation performance and operational stability.

[0079] Example 3

[0080] To improve dust collection efficiency, this embodiment improves the dust collection pipe 23 of the dust collection device 2 based on Embodiment 1 or Embodiment 2, such as... Figure 5 As shown, a combination structure of a venturi tube 231 and a conical disk 232 is provided inside the suction pipe 23.

[0081] The Venturi tube 231 has a contraction section and an expansion section in the pipeline. When the dust-laden airflow passes through the contraction section of the Venturi tube 231, the airflow velocity will increase significantly. Under the acceleration of the airflow, the dust particles move faster, which helps to transport the dust to the collection area of ​​the dust collection device 2 more quickly and makes it less likely to adhere to the pipe wall.

[0082] Meanwhile, the venturi tube 231 easily forms a negative pressure zone in the contraction section, which draws air from inside the suction tube 23, improving the dust capture efficiency.

[0083] Furthermore, the conical disc 232 is mounted at the lower center of the constriction section of the venturi tube 231 via a fixing bracket. This creates an even lower low-pressure zone inside the conical tube, allowing the dust airflow to be drawn in more quickly.

[0084] Compared with the prior art, this embodiment sets up a combination structure of Venturi tube 231 and conical disk 232 in the suction pipe 23, which increases the flow rate of dust by utilizing the Venturi effect and accelerates the speed at which dust enters the dust collection hopper 24; the Venturi tube 231 and conical disk 232 form a low-pressure zone, which allows dust to be sucked in more quickly and improves the dust capture efficiency.

[0085] During the mold cleaning process, the graphite is broken into larger pieces by the pneumatic pick 1. Some of these graphite pieces may splatter and be sucked into the inlet of the vacuum cleaner 22, causing blockage. Figure 6 As shown, in this embodiment, a third blade 16 is provided at the inlet of the vacuum cleaner 22 to crush the graphite block sucked into the inlet of the vacuum cleaner 22.

[0086] like Figure 7 and Figure 8 As shown, the third cutting tool 16 includes a limiting post 161, a transmission ring 162, a connecting post 163, a transmission gear 165, a blade 164, and a transmission rod 166. The transmission rod 166 is connected to the pick 14 and provides power transmission for the third cutting tool 16. The limiting post 161 includes a circumferential portion and a cylindrical portion. The circumferential portion is fitted onto the transmission rod 166 and can rotate with the transmission rod 166; the end of the cylindrical portion is connected to the transmission ring 162. The transmission ring 162 has a connecting post 163 on its edge, and the transmission ring 162 transmits the rotation of the limiting post 161 to the connecting post 163. The end of the connecting post 163 is fixed to the transmission gear 165, and the rotation of the connecting post 163 is converted into the rotation of the transmission gear 165. Thus, the rotation of the transmission rod 166 ultimately drives the transmission gear 165 to rotate, which in turn drives the blade 164, which is fixed to the transmission gear 165, to rotate. The blade 164 in the third cutting tool 16 is a blade type. The rotation of the third cutter 16 cuts and breaks the graphite block sucked into the vacuum cleaner 22, ensuring that the graphite block does not clog the vacuum cleaner 22.

[0087] Compared with the prior art, this embodiment provides a third blade 16 at the vacuum cleaner 22 inlet. Using the transmission rod 166, the limiting post 161, the transmission ring 162, the connecting post 163, and the transmission gear 165, the blade 164 is rotated under the power of the jackhammer 1, thereby breaking the graphite blocks that splash and are sucked to the vacuum cleaner 22 inlet into smaller graphite blocks, thus avoiding clogging of the dust collection device.

[0088] Example 4

[0089] Another embodiment of the present invention discloses an internal cleaning method for semi-enclosed castings, based on the internal cleaning device for semi-enclosed castings of Embodiment 3, comprising the following steps:

[0090] Step 1: Start the drive structure 13 of the pneumatic pick 1. The pick head of the pneumatic pick 1 begins to move up and down reciprocally and rotates around the central axis of the pneumatic pick 1.

[0091] Step 2: The first cutter 11 and the second cutter 15 rotate into the graphite mold and begin to cut the graphite mold; the third cutter 16 rotates to break up the graphite blocks that splashed into the vacuum cleaner 22 opening.

[0092] Step 2 specifically includes the following steps:

[0093] Step 2.1: The first cutter 11 rotates and cuts;

[0094] The cutting method of the first tool 11 in step 2.1 is as follows:

[0095] The spiral blade rotates into the graphite mold to cut it. During the cutting process, the graphite mold is gradually drawn in and broken as it rotates, while a certain axial thrust is generated to facilitate the smooth discharge of graphite and prevent it from accumulating in the broken area.

[0096] Step 2.2: The second cutter 15 enters the graphite mold for cutting along with the first cutter 11;

[0097] The cutting method of the second tool 15 is as follows:

[0098] The second cutter 15 follows the first cutter 11 as it rotates into the mold. The coarse saw teeth in the coarse crushing zone of the cutting section 153 coarsely crush the large mold pieces after the first cutter 11 has simply divided them. Because the coarse saw teeth are relatively sparse, the graphite fragments can smoothly enter the fine crushing zone. The saw teeth in the fine crushing zone further process the graphite fragments. Because the saw teeth are dense, they can act more precisely on the fragments and perform fine cutting so that the graphite mold can be smoothly discharged from the inside of the casting.

[0099] Furthermore, due to the design of the saw teeth specifically for graphite materials, the saw teeth can cut into the edge of the graphite well, generating appropriate crushing force inside the graphite and avoiding slippage. During the cutting process, the graphite chips can slide smoothly down the rear surface of the saw teeth, preventing graphite chips from accumulating on the saw teeth, thereby ensuring a continuous crushing process.

[0100] After cutting for a period of time, when there are fewer large mold blocks inside the casting, increase the inclination angle of the cutting part of the second cutter 15 to increase the tearing and crushing effect of the cutting part on the graphite mold block.

[0101] During the cutting process, the heat generated by the cutting of the first tool 11 and the second tool 15 is dissipated through the micropores provided in the cutting edge.

[0102] Furthermore, due to the buffering effect of the spring 12, the vibration of the first cutter 11 and the second cutter 15 is reduced, and the cutting angle can be adjusted as needed within the casting.

[0103] Step 2.3: The third cutter 16 rotates to cut the graphite fragments that have entered the suction pipe 23.

[0104] The pick 14 transmits power to the transmission rod 166, and then to the transmission gear 165 through the limit post 161, transmission ring 162, and connecting post 163. The transmission gear 165 transmits rotation to the blade 164. The rotation of the blade 164 cuts and breaks up the graphite fragments, ensuring that the graphite fragments do not clog the dust collection system.

[0105] Step 3: The dust is blocked and collected inside the baffle 21; the vacuum cleaner 22 is turned on; the dust collected by the baffle 21 is sucked into the vacuum cleaner 22 and enters the dust collection hopper 24 through the suction pipe 23.

[0106] In step 3, the vacuum cleaner 22 draws dust into the suction pipe 23. The suction pipe 23 is equipped with a combination structure of a venturi tube 231 and a conical disk 232. The lower part of the venturi tube 231 and the conical disk 232 form a negative pressure zone, which accelerates the adsorption of dust and delivers the dust to the collection area of ​​the dust collection device 2 more quickly, and the dust is less likely to adhere to the pipe wall.

[0107] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A semi-enclosed internal cleaning device for castings, characterized in that, Includes a pneumatic pick (1) and a dust collection device (2); The pneumatic pick (1) includes a first cutter (11) and a second cutter (15), a drive structure (13) and a pick chisel (14). The first cutting tool (11) performs reciprocating linear motion and rotational motion under the drive structure (13) to break the graphite mold inside the casting; The second cutter (15) has a disc-shaped structure and includes a bottom (154), a center (151), a cutting section (153), and an edge (152). The cutting section (153) is disposed between the center (151) and the edge (152), and the cutting section (153) is uniformly arranged circumferentially along the axis of the second cutter (15). The length direction of the cutting section (153) is the radial direction of the second cutter (15). The height of the cutting section (153) increases from the center (151) to the edge. The section (152) gradually rises; the cutting section (153) has a sawtooth structure; the cutting section (153) includes a coarse crushing zone and a fine crushing zone; the sawtooth in the coarse crushing zone is larger than the sawtooth in the fine crushing zone, and the sawtooth spacing in the coarse crushing zone is larger than the sawtooth spacing in the fine crushing zone; the plane between the sawtooths is parallel to the bottom upper surface of the second cutter; the angle between one side of the sawtooth and the bottom upper surface is A, and the angle between the other side of the sawtooth and the bottom upper surface is B, then: 135° < A < 145°, 60° < B < 75°; The second cutter includes a cutting section angle adjustment structure for adjusting the tilt angle of the cutting section. The cutting section angle adjustment structure includes an adjustment plate and an adjustment groove. The adjustment plate is disposed at both ends of the cutting section. One end of the adjustment plate is fixed to the cutting section, and the other end is connected to the center or the edge. The adjustment groove is disposed at the center and the edge. The adjustment plate has a through hole corresponding to the adjustment groove, and bolts can be inserted into the adjustment groove and the through hole to fix the tilt angle of the cutting section. The pick (14) is used to connect the first cutting tool (11) and the drive structure (13). The dust collection device (2) is used to collect the dust generated during the operation of the pneumatic pick (1).

2. The semi-enclosed casting internal cleaning device according to claim 1, characterized in that, The first cutting tool (11) has a spiral blade structure.

3. The semi-enclosed casting internal cleaning device according to claim 1, characterized in that, The pneumatic pick (1) also includes a spring (12), which is disposed on the upper part of the first cutter (11) and is used to adjust the extension length and angle of the first cutter (11).

4. The semi-enclosed casting internal cleaning device according to claim 1, characterized in that, The dust collection device (2) is mounted on the pickaxe (14); the dust collection device (2) includes a baffle (21), a vacuum cleaner (22), a vacuum pipe (23) and a dust collection hopper (24).

5. The semi-enclosed casting internal cleaning device according to claim 4, characterized in that, The partition cover (21) is configured as an umbrella-shaped structure.

6. The semi-enclosed casting internal cleaning device according to claim 4, characterized in that, The suction pipe (23) connects the vacuum cleaner (22) and the dust collection hopper (24).

7. The semi-enclosed casting internal cleaning device according to claim 6, characterized in that, A venturi tube (231) and a conical disc (232) are provided inside the suction pipe (23).

8. The semi-enclosed casting internal cleaning device according to claim 7, characterized in that, The conical disk (232) is located at the lower part of the constricted section of the venturi tube (231).

9. The semi-enclosed casting internal cleaning device according to claim 1, characterized in that, The first cutting tool (11) has micropores on its cutting edge, which are used for heat dissipation.

10. A method for cleaning the interior of a semi-enclosed casting, characterized in that, For use in the semi-enclosed casting internal cleaning device according to any one of claims 1-9.

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