High-precision lathe for turning and centering bearing inner bore

Abstract

This utility model discloses a high-precision lathe for centering bearing inner bores, belonging to the field of lathe machining technology. It includes a frame, motor, three-jaw chuck, tool holder, and cutting tool. It also includes a chip suction mechanism and a quick-change mechanism. The chip suction mechanism includes a suction fan, a pipe connected to the suction fan, and an air chamber. A blocking assembly is provided inside the air chamber. The blocking assembly includes blades, a rotating shaft, and an eccentrically designed filter screen. The blades are connected to one end of the rotating shaft, and the filter screen is fixed to the other end of the rotating shaft. The quick-change mechanism is located on the tool holder, which has a tool groove. The cutting tool has a tapered head and a square groove. This utility model solves the problems of metal chip splashing and adhesion, and filter screen clogging, through the rotational vibration of the eccentric filter screen in the chip suction mechanism. It can efficiently suction chips, automatically clean the screen, and ensure precision.

Description

Technical Field

[0001] This utility model relates to the field of lathe machining technology, and in particular to a high-precision lathe for turning and centering the inner bore of bearings. Background Technology

[0002] As a key component of precision machinery, bearings require extremely high dimensional accuracy and surface finish for their inner bores. Lathes are the main machining equipment for turning the inner bores of bearings.

[0003] When existing lathes perform high-precision cutting on the inner bore of bearings, a large amount of metal chips are generated. The splashing of these chips can adhere to the cutting area or the machined surface, causing scratches on the machined surface or affecting the cutting of the tool, thereby reducing the machining accuracy of the inner bore of the bearing. Although some equipment is equipped with chip suction devices, the filter screen of the chip suction device can become clogged during use, resulting in reduced suction efficiency and inability to completely remove the chips.

[0004] Meanwhile, high-precision turning requires the tool to have extremely high clamping rigidity to resist cutting forces. Traditional tool holders have complex structures and insufficient preload when fixing the tool, resulting in poor vibration resistance of the tool during the cutting process, affecting the stability of the machining. Furthermore, when the tool is worn and needs to be replaced, the disassembly and assembly process is cumbersome, the positioning is inaccurate, and the auxiliary time is extended.

[0005] Therefore, this utility model proposes a high-precision lathe for turning and centering the inner bore of bearings to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems existing in the high-precision lathe for turning and centering bearing inner holes, such as the impact of cutting chips on machining accuracy, clogging of chip suction screens, complex tool changing, and vibration caused by insufficient clamping rigidity, this utility model aims to provide a high-precision lathe for turning and centering bearing inner holes with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a high-precision lathe for turning and centering bearing inner holes, including: a frame, a motor mounted on the frame, a three-jaw chuck connected to the motor drive, a tool holder movably mounted on the frame, a cutting tool mounted on the tool holder, a chip suction mechanism and a quick change mechanism; The dust collection mechanism includes a suction fan, a pipe connected to the suction fan, and an air chamber. The air chamber is equipped with a blocking component, which includes blades, a rotating shaft, and an eccentrically designed filter screen. The blades are connected to one end of the rotating shaft, and the filter screen is fixed to the other end of the rotating shaft. Furthermore, the quick-change mechanism is located on the tool holder, the tool holder has a tool groove, the tool has a conical head and a square groove, and the quick-change mechanism also includes a limiting plate, a screw and a disc washer located between the screw and the tool holder.

[0008] Preferably, the dust collection mechanism further includes a fixing plate for supporting the air chamber; the blocking assembly further includes a support rod for fixing the rotating shaft.

[0009] Preferably, the chip suction mechanism further includes a support, an air collection hood, a chip collection box, and a baffle. The support connects the air chamber and the air collection hood. The air collection hood has an inverted conical portion. The baffle is located above the chip collection box and is used to guide iron chips into the chip collection box.

[0010] Preferably, the cutting tool and the cutting groove are fitted with a square key.

[0011] Preferably, the limiting plate is adapted to be inserted into the square groove from the outside of one horizontal side of the tool holder.

[0012] Preferably, the quick-change mechanism further includes a rubber pad, which is attached to the upper part of the limiting plate, and the lower part of the limiting plate is attached to the square groove. The screw is used to tighten to compress the limiting plate.

[0013] Preferably, the rotation center of the filter is offset from the geometric center of the filter to form the eccentric design.

[0014] Preferably, the blades are configured to be driven to rotate by the airflow generated by the suction fan.

[0015] This utility model has the following beneficial effects: 1. This utility model solves the problems of cutting chips splashing and adhering, affecting machining accuracy, and clogging the chip suction filter in the prior art by setting up a chip suction mechanism and using a suction fan to generate wind in the air chamber. The wind drives the blades to rotate and vibrate the eccentrically designed filter screen.

[0016] 2. This utility model solves the problems of complicated tool replacement and vibration caused by insufficient clamping rigidity in the prior art by setting up a quick-change mechanism, using conical head alignment, square key anti-rotation, and a limiting plate with continuous pre-tightening force provided by screws and disc washers for clamping. Attached Figure Description

[0017] Figure 1 This is a perspective view of the high-precision lathe for turning and centering the bearing inner hole proposed in this utility model. Figure 2 This is a cross-sectional view of the air chamber of the high-precision lathe for turning and centering the bearing inner hole proposed in this utility model. Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a cross-sectional view of the tool holder for a high-precision lathe for centering and turning the inner bore of a bearing, as proposed in this utility model. Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0018] Legend: 1. Frame; 2. Motor; 3. Three-jaw clamp; 4. Tool holder; 5. Tool; 6. Chip suction mechanism; 601. Fan; 602. Pipe; 603. Air chamber; 604. Fixing plate; 605. Blocking assembly; 6051. Blade; 6052. Support rod; 6053. Rotating shaft; 6054. Filter screen; 606. Bracket; 607. Air collection hood; 608. Chip collection box; 609. Baffle; 7. Quick change mechanism; 701. Conical head; 702. Limiting plate; 703. Rubber pad; 704. Screw; 705. Square slot; 706. Tool slot; 707. Disc washer. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] Example: Please refer to Figures 1 to 5 This utility model provides a high-precision lathe for centering bearing inner bore turning, including a frame 1, a motor 2 fixedly mounted on the frame 1, a three-jaw chuck 3 connected to the motor 2 and disposed at one end of the frame 1, the three-jaw chuck 3 being used for self-centering clamping of the workpiece, i.e., the bearing to be machined, a tool holder 4 movably disposed on the frame 1, the tool holder 4 being able to move along the guide rail of the frame 1, and a cutting tool 5 mounted on the tool holder 4, the cutting tool 5 being used for cutting the bearing inner bore. In terms of working principle, the motor 2 starts and drives the three-jaw chuck 3 to rotate, thereby driving the bearing... Rotation and movement of the tool holder 4 bring the tool 5 to the appropriate position to perform cutting on the bearing inner hole. To achieve high-precision turning, the bearing inner hole turning centering high-precision lathe also includes a chip suction mechanism 6 and a quick-change mechanism 7. The chip suction mechanism 6 is set on the frame 1 and located near the cutting position of the tool 5. It is used to absorb and collect the iron chips generated during the cutting process to prevent the iron chips from adhering to the cutting part and affecting the cutting accuracy. The quick-change mechanism 7 is set on the tool holder 4 and is used to realize the quick disassembly, replacement and high rigidity fixation of the tool 5 to ensure the stability of cutting.

[0021] Please refer to Figure 2 and Figure 3The high-precision lathe for centering bearing inner bores also includes a chip suction mechanism 6. The chip suction mechanism 6 includes a suction fan 601, a pipe 602, an air chamber 603, a fixed plate 604, a blocking component 605, a bracket 606, a gas collection hood 607, a chip collection box 608, and a baffle 609. The suction fan 601 is connected to the air chamber 603 via the pipe 602, providing suction power to the chip suction mechanism 6. The air chamber 603 is fixedly connected to the frame 1 via the fixed plate 604. A blocking component 605 is installed inside the air chamber 603. 05 includes blades 6051, support rods 6052, a rotating shaft 6053, and a filter screen 6054. The support rod 6052 is fixed to the inner wall of the air chamber 603 to support the rotating shaft 6053, allowing it to be rotatably mounted. Blades 6051 are fixedly connected to one end of the rotating shaft 6053 and are configured to be driven to rotate by the airflow generated by the suction fan 601. The filter screen 6054 is fixedly connected to the other end of the rotating shaft 6053 and has an eccentric design. Specifically, the filter screen 6054... The rotation center is offset from the geometric center of the filter screen 6054. This structure causes the filter screen 6054 to vibrate as it rotates with the rotating shaft 6053, shaking off the adsorbed iron filings and preventing clogging. The bracket 606 is fixedly connected to the air chamber 603 and the air collection hood 607. The air collection hood 607 has an inverted conical portion that covers the cutting area of ​​the tool 5, used to collect a large area of ​​splashed iron filings. The chip collection box 608 is removably mounted below the frame 1 or the air collection hood 607. The baffle 60... The 9 is inclinedly positioned below the chip discharge port of the air collection hood 607 and above the chip collection box 608. When the suction fan 601 is working, the iron chips are sucked into the air collection hood 607, fall onto the baffle 609, and then slide into the chip collection box 608 guided by the baffle 609. The air passes through the rotating and vibrating filter screen 6054 and is finally discharged through the pipe 602 and the suction fan 601. This wind-driven chip suction structure ensures that the iron chips are removed in time and avoids the iron chips from adhering to the cutting part and affecting the machining accuracy.

[0022] As a preferred embodiment, please refer to Figure 4 and Figure 5 To ensure the rigidity of the torque transmission of the tool 5 during cutting, the tool 5 and the tool groove 706 are fitted with a square key, which prevents the tool 5 and the tool holder 4 from rotating relative to each other.

[0023] As another preferred embodiment, in order to fix the tool 5 axially, the limiting plate 702 is adapted to be inserted from the outside of a horizontal side of the tool holder 4 and is locked into the square groove 705 on the tool 5, thereby axially limiting the tool 5.

[0024] As another preferred embodiment, please refer to Figure 4 and Figure 5To ensure reliable clamping of the tool 5, the quick-change mechanism 7 also includes a rubber pad 703. The rubber pad 703 is attached to the upper part of the limiting plate 702, and the lower part of the limiting plate 702 is attached to the bottom surface of the square groove 705. The screw 704 is inserted from the outside of the tool holder 4 and threadedly engages with the tool holder 4. A disc washer 707 is located between the head of the screw 704 and the tool holder 4 to provide continuous axial preload. When the screw 704 is tightened, the screw 704 presses against the limiting plate 702 through the disc washer 707. The limiting plate 702 then securely fixes the tool 5 in the tool groove 706 through the rubber pad 703 and the lower part of the square groove 705. Working principle: The bearing to be processed is placed on the three-jaw chuck 3 for self-centering. After clamping, the motor 2 drives the three-jaw chuck 3 to rotate. The tool holder 4, set on the frame 1, moves to bring the tool 5 to the appropriate position to cut the inner hole of the bearing. During the cutting process, the chip suction mechanism 6 starts working. The suction fan 601 in the chip suction mechanism 6 starts to generate suction. The suction fan 601 is connected to the ventilation chamber 603 through the pipe 602, generating airflow in the ventilation chamber 603. The fixed plate 604 is used to support the ventilation chamber 603. The blades 6051 in the blocking assembly 605 in the ventilation chamber 603 are driven to rotate by the airflow. One end of the blades 6051 is fixedly connected to the rotating shaft 6053, so that the rotating shaft 6053, which is fixed by the support rod 6052, can rotate with the blades 6051. At the same time, the filter screen 6054, which is fixed to the other end of the rotating shaft 6053, also rotates. The filter 6054 allows air to pass through, generating suction while blocking iron filings. The eccentric design of the filter 6054, where its rotation center is offset from its geometric center, causes it to vibrate during rotation, preventing excessive suction from drawing iron filings and causing blockage. The bracket 606 securely connects the air chamber 603 and the air collection hood 607, ensuring the filter 6054 remains in place during rotation. The inverted conical portion of the air collection hood 607 covers the area where iron filings fall. The hood uses suction to draw in the iron filings, which then fall onto the baffle 609 and are guided by the baffle into the chip collection box 608 for easy cleaning. Through the coordinated action of the chip suction mechanism 6, iron filings generated during the cutting of the bearing inner hole are collected, preventing them from flying around and adhering to the cutting area, thus affecting cutting accuracy. When it is necessary to replace the tool 5, the quick-change mechanism 7 starts to work. The tapered head 701 at the bottom of the tool 5 is quickly aligned with the tool groove 706 on the tool holder 4, and the tool 5 is inserted into the tool holder 4. The keyed engagement between the tool 5 and the tool groove 706 ensures that the tool 5 and the tool holder 4 will not rotate relative to each other. Then, the limiting plate 702 is inserted from the outside of the horizontal side of the tool holder 4 and inserted into the square groove 705 on the tool 5 to fix the tool 5 and prevent it from sliding. At the same time, the screw 704 is inserted into the outside of the tool holder 4. The disc washer 707 located between the screw 704 and the tool holder 4 provides a continuous axial preload. By tightening the screw 704, the limiting plate 702, which is attached to the rubber pad 703 at the top and the square groove 705 at the bottom, is squeezed to firmly fix the tool 5 in the tool holder 4, achieving high rigidity fixation of the tool 5 and quick replacement and maintenance.

Claims

1. A high-precision centering lathe for turning the bearing bore, comprising: A frame (1) and a three-jaw clamp (3) are provided. A motor (2) is fixedly connected to the top of the frame (1). The three-jaw clamp (3) is connected to the motor (2) in a transmission manner. A tool holder (4) is movably provided on the frame (1). A tool (5) is installed on the left side of the tool holder (4). The lathe is characterized in that it further includes a chip suction mechanism (6) and a quick-change mechanism (7). The chip suction mechanism (6) includes a suction fan (601), a pipe (602) connecting the suction fan (601), and an air chamber (603). The air chamber (603) is provided with a blocking assembly (605). The blocking assembly (605) includes blades (6051), a rotating shaft (6053), and an eccentrically designed filter screen (6054). The blades (6051) and the rotating shaft (6054) are connected to each other. One end of the shaft (6053) is connected, the filter screen (6054) is fixed at the other end of the shaft (6053), the quick-change mechanism (7) is provided on the knife holder (4), the knife holder (4) is provided with a knife groove (706), the knife (5) has a conical head (701) and a square groove (705), the quick-change mechanism (7) also includes a limiting plate (702), a screw (704) and a disc washer (707) provided between the screw (704) and the knife holder (4).

2. The bearing bore turning center high precision lathe according to claim 1, characterized in that, The dust collection mechanism (6) also includes a fixing plate (604) for supporting the air chamber (603), and the blocking assembly (605) also includes a support rod (6052) for fixing the rotating shaft (6053).

3. The bearing bore turning center high precision lathe of claim 1, wherein, The chip suction mechanism (6) further includes a bracket (606), a gas collection hood (607), a chip collection box (608), and a baffle (609). The bracket (606) connects the air chamber (603) and the gas collection hood (607). The gas collection hood (607) has an inverted conical part. The baffle (609) is located above the chip collection box (608) and is used to guide iron chips into the chip collection box (608).

4. The bearing bore turning center high precision lathe of claim 1, wherein, The cutting tool (5) and the cutting groove (706) are fitted with a square key.

5. The bearing bore turning center high precision lathe of claim 1, wherein, The limiting plate (702) is adapted to be inserted into the square groove (705) from the outside of a horizontal side portion of the tool holder (4).

6. The bearing bore turning center high precision lathe of claim 5, wherein, The quick-change mechanism (7) also includes a rubber pad (703), which is attached to the upper part of the limiting plate (702), and the lower part of the limiting plate (702) is attached to the square groove (705). The screw (704) is used to tighten to compress the limiting plate (702).

7. The high-precision lathe for turning and centering the bearing inner bore according to claim 1, characterized in that, The rotation center of the filter (6054) is offset from the geometric center of the filter (6054) to form the eccentric design.

8. The bearing bore turning center high precision lathe of claim 1, wherein, The blade (6051) is configured to be driven to rotate by the wind force generated by the suction fan (601).

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