A precision part orifice burr directional removal device

Abstract

The application relates to the technical field of part production and processing, and discloses a precision part orifice burr directional removal device, which comprises a tool shank, an installation cavity is formed in the inside of the tool shank, a blade is rotationally installed in the inside of the installation cavity, an adjusting cavity is formed in the inside of the bottom end of the tool shank, a main spray hole is formed in the side of the adjusting cavity facing the blade, an adjusting ring is slidably installed in the inside of the adjusting cavity, and the adjusting ring is in transmission connection with the blade. The blade is cooled by the cooling liquid, the chips are prevented from entering the gap between the blade and the opening of the installation cavity, the probability that the blade is blocked by the chips and cannot be smoothly ejected is reduced, the effective polishing time of the blade is ensured, the polishing precision is ensured, the blade is contracted, part of the pressure of the blade exerted by the compression spring is offset, the pressure between the blade and the inner wall of the orifice is reduced, the blade and the inner wall of the orifice are lubricated by the cooling liquid, and the probability that the inner wall of the orifice is damaged in the process that the blade passes through the orifice is reduced.

Description

Technical Field

[0001] This application relates to the field of parts manufacturing and processing technology, and in particular to a device for directional removal of burrs from the openings of precision parts. Background Technology

[0002] Burrs are generated during the cutting and welding of mechanical parts due to plastic deformation. Burrs can affect the manufacturing precision of mechanical parts. According to different processing methods, burrs can be roughly divided into casting burrs, forging burrs, stamping burrs and cutting burrs. Among them, the burrs generated by stamping holes are distributed on both sides of the punched hole surface of the part. In order to achieve the purpose of quickly removing burrs, the existing technology mostly uses a retractable deburring knife to grind and remove the burrs at the hole opening of the part.

[0003] As per the instruction manual Figure 1 and appendix Figure 2 As shown, the blade 4 is installed in the mounting cavity 3 with the cooperation of the pressing rod 5, the pressing spring 6 and the support shaft 7. The part of the blade 4 used for grinding and removing burrs extends out of the mounting cavity 3 under the action of the pressing spring 6 and the pressing rod 7. The part of the blade 4 used for grinding burrs is inclined. As the handle 1 drives the blade 4 to move into the hole to be ground, the inclined surface of the blade 4 is squeezed by the inner wall of the hole, causing the blade 4 to move into the mounting cavity 3 until the blade 4 retracts into the mounting cavity 3, so that the blade 4 passes through the hole and grinds and removes the burrs on the other side of the hole.

[0004] The inclined design of the blade 4 results in a smaller gap between the blade 4 and the opening of the mounting cavity 3 when the blade 4 extends, making it difficult for debris generated during the burr removal process to enter. However, when the blade 4 retracts, the gap between it and the opening of the mounting cavity 3 widens, and the blade 4 is in the process of passing through the hole. When the hole is thick, the blade 4 takes longer to pass through. Under the action of the compression spring 6, the blade 4 is pressed against the inner wall of the hole, which may cause damage to the inner wall of the hole during the process of passing through the hole, thus damaging the smoothness of the inner wall of the hole. This is especially true for the inner wall of the hole with threads, as damage to the threads by the blade 4 will affect the assembly accuracy of the part.

[0005] Furthermore, the debris generated by the friction between the blade 4 and the inner wall of the orifice is difficult to expel due to the small space. It easily enters the gap between the blade 4 and the opening of the mounting cavity 3, causing the blade 4 to be blocked by debris at the inner wall of the opening of the mounting cavity 3. When the blade 4 passes through the orifice, the blocked debris will affect the reset speed of the blade 4. As a result, when the tool holder 1 drives the blade 4 to move in the opposite direction to grind the burrs on the other side of the orifice, the blade 4 cannot be ejected quickly, affecting the consistency of burr removal. The effective grinding time of the blade 4 is reduced, resulting in the blade 4 being reset with the tool holder 1 before the burrs at the orifice are completely ground, affecting the grinding accuracy of the burrs at the orifice. Summary of the Invention

[0006] This application proposes a precision parts orifice burr removal device, which features the advantages of cooling the blade with coolant to prevent debris from entering the gap between the blade and the mounting cavity opening, reducing the probability of the blade being blocked by debris and unable to eject smoothly, ensuring effective grinding time and grinding accuracy, assisting blade retraction to offset part of the pressure of the compression spring on the blade, thereby reducing the pressure between the blade and the inner wall of the orifice, and lubricating the blade and the inner wall of the orifice with coolant to reduce the probability of damage to the inner wall of the orifice during the blade's passage through the orifice. This device solves the problem of shortened effective grinding time and reduced burr removal accuracy caused by debris blocking the blade mounting cavity during blade state switching during double-sided grinding of orifice burrs.

[0007] To achieve the above objectives, this application adopts the following technical solution: a precision parts orifice burr removal device, comprising a tool holder, an installation cavity inside the tool holder, a blade rotatably mounted inside the installation cavity, and an adjustment cavity inside the bottom end of the tool holder, an adjustment ring slidably mounted inside the adjustment cavity and connected to the blade via a transmission. A main spray hole is provided on the side of the adjustment cavity facing the blade, and a secondary spray hole communicating with the adjustment cavity is provided inside the tool holder. A liquid outlet hole is provided on the inner bottom wall of the installation cavity and communicates with the secondary spray hole. During the process of the tool holder driving the blade to rotate and pass through the orifice, when the blade is moved into the installation cavity by force, the adjustment ring is moved through the transmission connection, changing the communication state between the adjustment cavity and the main spray hole and between the adjustment cavity and the secondary spray hole. This allows the coolant to cool the blade from different angles, supporting the blade and assisting in the blade's retraction.

[0008] As the tool holder rotates and grinds the burrs at the orifice, coolant cools the blade from both sides through the main spray nozzle, preventing debris from entering the gap between the blade and the mounting cavity opening. When the blade passes through the orifice and changes position under pressure, coolant impacts the gap between the blade and the mounting cavity opening through the outlet, reducing the probability of the blade being blocked by debris and unable to eject smoothly. This ensures effective grinding time and grinding accuracy, assists in blade retraction, offsets some of the pressure from the compression spring on the blade, thereby reducing the pressure between the blade and the inner wall of the orifice. Furthermore, the coolant lubricates the blade and the inner wall of the orifice, reducing the probability of damage to the inner wall of the orifice during the blade's passage.

[0009] Furthermore, a support shaft is fixedly installed inside the mounting cavity, and a groove adapted to the support shaft is provided on the blade to provide a fulcrum for rotation of the blade.

[0010] Furthermore, the length of the adjusting ring near the blade is less than the length of the adjusting cavity, the bottom end of the blade is inclined, and the liquid outlet is oriented toward the inclined surface of the blade used for deburring.

[0011] Furthermore, an adjusting rod is fixedly installed on the side of the adjusting ring away from the secondary nozzle. The side of the adjusting rod away from the adjusting ring moves through the adjusting cavity and is airtightly slidably connected to the adjusting cavity. The ends of the two adjusting rods away from the adjusting ring are fixedly connected to a connecting rod, which is placed on the side where the blade is not tilted.

[0012] Furthermore, a limiting groove is provided on the inner wall of the mounting cavity to be slidably connected to the connecting rod, and the axis of the limiting groove coincides with the axis of the support shaft.

[0013] Furthermore, an elastic element is provided between the side of the connecting rod away from the adjusting rod and the limiting slide groove to assist the connecting rod in resetting.

[0014] Furthermore, a sealing ring is airtightly rotatably connected to the outer side of the top of the knife handle, and a liquid inlet pipe is fixedly connected to the sealing ring. The end of the liquid inlet pipe away from the knife handle is fixedly connected to the liquid pump. A flow channel connected to the sealing ring is opened inside the knife handle, and the flow channel is connected to the adjustment chamber.

[0015] The beneficial effects of this invention are as follows: This application provides a precision parts hole burr removal device. During the process of the blade rotating and grinding the burrs at the hole, the blade passes through the hole and switches positions under force. Cooling is used to cool the blade to prevent debris from entering the gap between the blade and the opening of the mounting cavity, reducing the probability of the blade being blocked by debris and unable to eject smoothly. This ensures the effective grinding time of the blade, guarantees grinding accuracy, assists in blade retraction, offsets part of the pressure of the compression spring on the blade, thereby reducing the pressure between the blade and the inner wall of the hole. Furthermore, the coolant lubricates the blade and the inner wall of the hole, reducing the probability of damage to the inner wall of the hole during the blade's passage through the hole. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the front cross-sectional structure of the present invention; Figure 3This is a top view cross-sectional structural diagram of the handle in the extended state of the blade of the present invention; Figure 4 This is a top view cross-sectional structural diagram of the tool holder in the retracted state of the blade of the present invention; Figure 5 This is a top cross-sectional view of the tool holder, mounting cavity, and adjustment cavity of the present invention.

[0017] In the diagram: 1. Knife handle; 2. Mounting groove; 3. Mounting cavity; 4. Blade; 5. Pressing rod; 6. Pressing spring; 7. Support shaft; 8. Adjusting cavity; 9. Adjusting ring; 10. Liquid outlet; 11. Main spray hole; 12. Secondary spray hole; 13. Connecting rod; 14. Adjusting rod; 15. Limiting slide groove; 16. Sealing ring; 17. Liquid inlet pipe. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] See Figures 1 to 5 A precision parts hole burr removal device includes a tool holder 1. The top of the tool holder 1 has an internal mounting groove 2, and the bottom of the tool holder 1 has an internal mounting cavity 3, which is connected to the mounting groove 2. A support shaft 7 is fixedly mounted inside the mounting cavity 3. A blade 4 is rotatably mounted inside the mounting cavity 3. The top of the blade 4 is inclined to assist in switching its state. A groove adapted to the support shaft 7 is provided on the blade 4. The blade 4 engages with the support shaft 7 through the groove and rotates around the axis of the support shaft 7. A pressure rod 5 is slidably mounted inside the mounting groove 2. The bottom end of the pressure rod 5 movably passes through the mounting groove 2 and is in contact with the blade 4. A pressure spring 6 is slidably mounted inside the mounting groove 2 and is positioned above the pressure rod 5. A limit post is threadedly connected to the top of the mounting groove 2.

[0020] When installing the blade 4, insert the blade 4 into the mounting cavity 3 between the mounting cavities 3, and make the groove on the blade 4 match the support shaft 7. Then, insert the pressure rod 5 into the mounting groove 2 from the top of the handle 1, so that the bottom end of the pressure rod 5 fits against the top end of the blade 4. Then, insert the pressure spring 6 into the mounting groove 2 from the top of the handle 1. Finally, rotate the threaded limiting post into the top of the mounting groove 2. The limiting post compresses the pressure spring 6, so that the pressure spring 6 presses and limits the blade 4 through the pressure rod 5. At the same time, with the cooperation of the support shaft 7, the blade 4 is limited and installed in the mounting cavity 3, so that the bottom end of the blade 4 remains in an outward protruding state when no external force is applied to the blade 4.

[0021] A sealing ring 16 is airtightly rotatably connected to the outer top of the tool holder 1. The sealing ring 16 is hollow. A liquid inlet pipe 17 is fixedly connected to the outer side of the sealing ring 16. The end of the liquid inlet pipe 17 away from the tool holder 1 is fixedly connected to a liquid pump. A flow channel (not shown in the figure) connected to the sealing ring 16 is opened inside the tool holder 1. Two adjustment chambers 8 are symmetrically opened inside the bottom end of the tool holder 1. Both adjustment chambers 8 are fixedly connected to the flow channel and are respectively placed on both sides of the blade 4. A main spray hole 11 is opened on the side of the adjustment chamber 8 closest to the blade 4. The main spray hole 11 faces the opening of the mounting cavity 3 and is connected to the mounting cavity 3. During the process of the tool holder 1 driving the blade 4 to grind and remove burrs at the orifice, liquid is pumped into the liquid inlet pipe through the liquid pump. 17. Coolant is pumped in and connected to the tool holder 1 in an airtight rotation via the sealing ring 16, allowing the coolant to enter the flow channel normally during the rotation of the tool holder 1. The rotation of the tool holder 1 will not cause motion interference to the inlet pipe 17 and the pump. The coolant flows through the sealing ring 16 and the flow channel to the regulating chamber 8, and then is sprayed out through the main nozzle 11 to cool the blade 4 from both sides, preventing the blade 4 from being affected by high temperature due to long-term friction and heat generation, which would affect its service life. Since the main nozzle 11 faces the opening of the mounting cavity 3, the coolant provides a flow seal to the opening of the mounting cavity 3, preventing debris generated by the blade 4 grinding the burrs at the opening from entering the gap between the blade 4 and the mounting cavity 3, reducing the probability of debris clogging the gap between the blade 4 and the mounting cavity 3.

[0022] An adjusting ring 9 is slidably installed inside the adjusting cavity 8. A secondary spray hole 12 communicating with the adjusting cavity 8 is opened inside the handle 1. A liquid outlet hole 10 is opened on the inner bottom wall of the mounting cavity 3, and the secondary spray hole 12 is connected to the liquid outlet hole 10. The liquid outlet hole 10 faces the inclined surface of the blade 4, so that the coolant entering the adjusting cavity 8 can flow through the secondary spray hole 12 and the liquid outlet hole 10 into the gap between the inclined surface of the blade 4 and the mounting cavity 3. Then, when the handle 1 drives the blade 4 through the orifice, the coolant sprayed through the liquid outlet hole 10 generates a certain impact force on the blade 4, assisting the blade 4 to contract, offsetting part of the pressure of the pressure spring 6 on the blade 4, thereby reducing the pressure between the blade 4 and the inner wall of the orifice, and reducing the probability of the blade 4 damaging the inner wall of the orifice during the process of passing through the orifice.

[0023] An adjusting rod 14 is fixedly installed on the side of the adjusting ring 9 away from the inclined surface of the blade 4. The side of the adjusting rod 14 away from the adjusting ring 9 passes through the adjusting cavity 8 and is airtightly slidably connected to the adjusting cavity 8. The ends of the two adjusting rods 14 away from the adjusting ring 9 are fixedly connected to a connecting rod 13. A limiting groove 15 is symmetrically opened on the inner wall of the mounting cavity 3, which is slidably connected to the connecting rod 13. The axis of the limiting groove 15 coincides with the axis of the support shaft 7. Therefore, the sliding trajectory of the connecting rod 13 is to slide around the axis of the support shaft 7. The connecting rod 13 is placed on the side of the adjusting cavity 8 away from the secondary nozzle 12. The side of the connecting rod 13 away from the adjusting ring 9 is connected to the limiting groove 13. An elastic element (not shown in the figure) is provided between the inner walls of the groove 15. Under the action of the elastic element, when no external force is applied to the connecting rod 13, the connecting rod 13 is in contact with the non-inclined side of the blade 4. The adjusting ring 9 is placed inside the adjusting cavity 8 on the side close to the secondary spray hole 12, and the secondary spray hole 12 is blocked by the adjusting ring 9, so that the secondary spray hole 12 is in a blocked state, while the main spray hole 11 is in an open state. At this time, the coolant enters the adjusting cavity 8 and flows directly out from the main spray hole 11, thereby cooling the blade 4 from both sides of the blade 4 and preventing the debris generated during the deburring process of the blade 4 from entering the gap between the blade 4 and the opening of the mounting cavity 3.

[0024] As the knife handle 1 drives the mounting cavity 3 through the orifice, the inclined surface of the blade 4 is compressed, overcoming the elastic force of the compression spring 6, causing the blade 4 to rotate around the axis of the support shaft 7. The blade 4 gradually retracts into the mounting cavity 3. When the blade 4 rotates, it compresses the connecting rod 13, causing the connecting rod 13 to rotate around the axis of the support shaft 7 under the limitation of the limiting slide groove 15. The connecting rod 13 drives the adjusting ring 9 to move through the adjusting rod 14, causing the adjusting ring 9 to block the main spray hole 11 and release its blockage of the secondary spray hole 12, allowing the secondary spray hole 12 to connect with the liquid outlet hole 10, thus allowing the liquid to enter the adjusting ring. The coolant in cavity 8 flows through the secondary spray hole 12 to the outlet hole 10, and finally flows through the outlet hole 10 into the gap between the inclined surface of the blade 4 and the mounting cavity 3, generating a certain impact force on the blade 4, reducing the probability that the blade 4 will be blocked by debris and unable to be ejected smoothly, ensuring the effective grinding time of the blade 4, ensuring grinding accuracy, assisting the blade 4 to retract, offsetting part of the pressure of the pressure spring 6 on the blade 4, thereby reducing the pressure between the blade 4 and the inner wall of the orifice, and lubricating the blade 4 and the inner wall of the orifice through the coolant, reducing the probability of the blade 4 causing damage to the inner wall of the orifice during the process of passing through the orifice.

[0025] Working principle: During the grinding process of the burrs on the orifice of the part, coolant is pumped into the inlet pipe 17 by the liquid pump. The drive source drives the tool holder 1 and the blade 4 to rotate and move towards the orifice. At this time, under the action of the spring force of the pressure spring 6, the bottom end of the blade 4 is in the extended state. The burrs on the orifice of the part that first contacts the blade 4 are first removed by the rotational grinding of the inclined surface of the blade 4. During the grinding process, the coolant flows into the regulating cavity 8 through the sealing ring 16 and the flow channel, and then sprays out through the main spray hole 11 to cool the blade 4 from both sides, preventing the blade 4 from being affected by high temperature due to long-term friction and heat generation, which affects its service life. Since the main spray hole 11 faces the opening of the mounting cavity 3, the coolant provides a fluid seal to the opening of the mounting cavity 3, preventing the debris generated by the blade 4 grinding the burrs on the orifice from entering the gap between the blade 4 and the mounting cavity 3, reducing the probability of debris clogging the gap between the blade 4 and the mounting cavity 3. As the handle 1 continues to move, the blade 4 is squeezed by the inner wall of the orifice, causing the blade 4 to overcome the elastic force of the compression spring 6 and rotate around the axis of the support shaft 7 into the mounting cavity 3 until the blade 4 retracts into the mounting cavity 3. During the rotation of the blade 4, it squeezes the connecting rod 13, causing the connecting rod 13 to rotate around the axis of the support shaft 7 under the limit of the limiting groove 15. The connecting rod 13 drives the adjusting ring 9 to move through the adjusting rod 14, causing the adjusting ring 9 to block the main spray hole 11 and release its blockage of the secondary spray hole 12, allowing the secondary spray hole 12 to connect with the liquid outlet hole 10, so that the liquid can enter the main spray hole 11. The coolant in the regulating chamber 8 flows through the secondary spray hole 12 to the outlet hole 10, and finally flows through the outlet hole 10 into the gap between the inclined surface of the blade 4 and the mounting chamber 3. This prevents debris from entering, generates a certain impact force on the blade 4, reduces the probability that the blade 4 will be blocked by debris and cannot be ejected smoothly, ensures the effective grinding time of the blade 4, ensures grinding accuracy, assists the blade 4 to retract, offsets part of the pressure of the pressure spring 6 on the blade 4, thereby reducing the pressure between the blade 4 and the inner wall of the orifice, and lubricates the blade 4 and the inner wall of the orifice through the coolant, reducing the probability of the blade 4 causing damage to the inner wall of the orifice during the process of passing through the orifice.

[0026] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A precision parts hole burr removal device, comprising a tool holder (1), wherein a mounting cavity (3) is provided inside the tool holder (1), and a blade (4) is rotatably mounted inside the mounting cavity (3), characterized in that, It also includes an adjustment cavity (8) located inside the bottom of the handle (1). An adjustment ring (9) is slidably installed inside the adjustment cavity (8), and the adjustment ring (9) is connected to the blade (4) in a transmission connection. The adjustment cavity (8) has a main spray hole (11) on the side facing the blade (4). The handle (1) has a secondary spray hole (12) connected to the adjustment cavity (8) inside. The bottom wall of the mounting cavity (3) has a liquid outlet hole (10), and the liquid outlet hole (10) is connected to the secondary spray hole (12). When the handle (1) drives the blade (4) to rotate and pass through the orifice, the blade (4) moves into the mounting cavity (3) under force. The adjustment ring (9) moves through the transmission connection, changing the communication state between the adjustment cavity (8) and the main spray hole (11) and between the adjustment cavity (8) and the secondary spray hole (12). This allows the coolant to cool the blade (4) from different angles, supporting the blade (4) and assisting the blade (4) to contract.

2. The precision parts orifice burr removal device according to claim 1, characterized in that, The mounting cavity (3) is fixedly installed with a support shaft (7), and the blade (4) is provided with a groove that matches the support shaft (7) to provide a rotation fulcrum for the blade (4).

3. The precision parts orifice burr removal device according to claim 1, characterized in that, The bottom end of the blade (4) is inclined, and the liquid outlet (10) faces the inclined surface of the blade (4) for grinding burrs.

4. The precision parts orifice burr removal device according to claim 3, characterized in that, An adjusting rod (14) is fixedly installed on the side of the adjusting ring (9) away from the auxiliary nozzle (12). The side of the adjusting rod (14) away from the adjusting ring (9) moves through the adjusting cavity (8) and is airtightly slidably connected to the adjusting cavity (8). The ends of the two adjusting rods (14) away from the adjusting ring (9) are fixedly connected to a connecting rod (13). The connecting rod (13) is placed on the side of the blade (4) that is not tilted.

5. The precision parts hole burr removal device according to claim 4, characterized in that, The inner wall of the mounting cavity (3) is provided with a limiting groove (15) that is slidably connected to the connecting rod (13), and the axis of the limiting groove (15) coincides with the axis of the support shaft (7).

6. The precision parts orifice burr removal device according to claim 5, characterized in that, An elastic element is provided between the side of the connecting rod (13) away from the adjusting rod (14) and the limiting slide groove (15) to assist the connecting rod (13) in resetting.

7. The precision parts hole burr removal device according to claim 1, characterized in that, A sealing ring (16) is airtightly rotatably connected to the outer side of the top of the knife handle (1). A liquid inlet pipe (17) is fixedly connected to the sealing ring (16). The end of the liquid inlet pipe (17) away from the knife handle (1) is fixedly connected to the liquid pump. A flow channel connected to the sealing ring (16) is opened inside the knife handle (1), and the flow channel is connected to the regulating chamber (8).

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