Anti-deformation floating tool based on mechanical thin-wall part machining

Abstract

The utility model discloses a kind of anti-deformation floating tool based on mechanical thin-walled part processing, including support seat, drive cylinder, transmission rod, tool slot, floating tool and driving mechanism, drive cylinder is rotationally connected on support seat, transmission rod coaxial rotation is connected in drive cylinder, and length is greater than drive cylinder, tool slot is through setting in transmission rod one end, floating tool is inserted in tool slot.In the utility model, pulley is used and is linked with external driving equipment through belt, instead of motor directly driving tool body, can avoid motor large torque directly acting on key transmission component;While pulley and driven disc are linked through friction force, and both are circular table structure, can be adjusted transmission torque by friction force size self-adapting, when torque exceeds threshold value, relative sliding can be generated, prevent because torque is too large and lead to floating tool or transmission rod deformation, meet the demand of low damage transmission for thin-walled part processing.

Description

Technical Field

[0001] This utility model relates to a floating turning tool, specifically a deformation-resistant floating turning tool for machining thin-walled mechanical parts, belonging to the field of floating turning tool technology. Background Technology

[0002] In the machining of thin-walled mechanical parts, floating turning tools have become one of the key tools for improving machining accuracy and efficiency because they can adapt to the characteristics of thin-walled parts that are prone to vibration and difficult to clamp. They are widely used in fields such as aerospace and automotive parts where the precision requirements for thin-walled structural parts are stringent.

[0003] However, most existing floating turning tools have various problems. For example, in the floating turning tool disclosed in CN2543629Y, although the turning tool is movably inserted into a long tool holder, and the turning tool changes from single-edge cutting to double-edge cutting, eliminating the vibration caused by single-edge cutting due to the long tool holder, and greatly improving the surface roughness of the hole, in this technical solution and most of the current floating turning tools, the current mainstream floating turning tools rely on direct motor drive for tool body rotation during operation. Although this drive method can provide stable power output and meet basic machining requirements, the driving torque of the motor is usually designed to be a general specification to adapt to various machining scenarios, and generally has the characteristic of large torque value. In specific scenarios involving the machining of thin-walled parts, the cutting tool must balance cutting flexibility with the protection of the thin-walled workpiece. Its structural strength must often be controlled within a reasonable range to avoid excessive rigidity that could cause the workpiece to break. When the driving torque output by the motor exceeds the strength threshold that the cutting tool itself can withstand, it is very easy to cause irreversible deformation of the cutting tool. This not only directly leads to the failure of the tool's accuracy and a shortened service life, but also causes dimensional deviations and a decrease in surface quality in the machining of thin-walled workpieces. In severe cases, it can even lead to the scrapping of the workpiece, significantly increasing production costs and making it difficult to meet the high-precision and low-loss machining requirements of thin-walled mechanical parts. Utility Model Content

[0004] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing technologies are too simplistic. Specifically, the purpose of this utility model is to solve the aforementioned shortcomings in existing technologies by proposing a deformation-resistant floating lathe tool for machining thin-walled mechanical parts.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A deformation-resistant floating turning tool for machining thin-walled mechanical parts includes a support base, a drive cylinder, a transmission rod, a tool slot, a floating turning tool, and a drive mechanism. The drive cylinder is rotatably connected to the support base, and the transmission rod is coaxially rotatably connected inside the drive cylinder and has a length greater than the drive cylinder. The tool slot is disposed through one end of the transmission rod, and the floating turning tool is inserted into the tool slot. The drive mechanism is disposed on the support base and includes a pulley, a driven plate, a mating cavity, a strong spring, a pressure adjusting nut, and an emergency stop assembly. The pulley is coaxially fixed to one end of the drive cylinder and is linked to the external drive equipment via a belt. The driven plate is coaxially slidably connected to the transmission rod. The mating cavity is coaxially located on one side of the pulley, and the driven plate abuts against the mating cavity. Both the driven plate and the mating cavity have a frustum-shaped structure. The pulley and the driven plate are linked by friction. A strong spring is sleeved on the transmission rod, and the pressure adjusting nut is threaded onto the other end of the transmission rod. The strong spring abuts against the driven plate and the pressure adjusting nut.

[0006] As a further improvement of this utility model: a connecting rod is fixedly protruding on the peripheral wall of the transmission rod, and the connecting rod is slidably engaged with the driven disc.

[0007] As a further embodiment of this utility model: the emergency stop assembly includes a connecting rod, a limiting pawl, and an emergency stop lever. The connecting rod is fixed to one side of the support base, the limiting pawl is rotatably connected to the connecting rod, and the emergency stop lever is fixed to the edge of the pulley, with one end of the limiting pawl engaging with the emergency stop lever.

[0008] As a further improvement of this utility model: a torsion spring is sleeved on the connecting rod, one end of the torsion spring is fixed to the connecting rod, and the other end is fixed to the limiting claw.

[0009] As a further improvement of this utility model, a positioning rod is also fixed on the support base, and the positioning rod abuts against one side of the limiting claw.

[0010] As a further improvement of this utility model: a belt groove is provided at the center of the peripheral wall of the belt pulley, and the cross-section of the belt groove is trapezoidal.

[0011] The beneficial effects of this utility model are: This invention employs a pulley and belt to link with an external drive device, instead of a motor directly driving the tool body. This avoids the high torque of the motor directly acting on critical transmission components. Simultaneously, the pulley and driven plate are linked by friction, and both are frustum-shaped structures, allowing for adaptive adjustment of the transmission torque based on the magnitude of friction. When the torque exceeds a threshold, relative sliding occurs, preventing deformation of the floating tool or transmission rod due to excessive torque. This meets the low-damage transmission requirements for thin-walled part machining. Rotating the adjusting nut changes the compression of the powerful spring, thereby adjusting the friction between the driven plate and the pulley, achieving precise control of the transmission torque. Different torques can be adapted to different thin-walled part machining needs, improving tool versatility and machining accuracy. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the drive mechanism structure of this utility model; Figure 3 This is a schematic diagram of the belt pulley structure of this utility model; Figure 4 This is a schematic diagram of the driven disk and its overall connection structure of the present invention.

[0013] In the diagram: 1. Support base; 2. Drive cylinder; 3. Transmission rod; 4. Tool slot; 5. Floating turning tool; 6. Drive mechanism; 61. Belt pulley; 62. Driven plate; 63. Connecting cavity; 64. Heavy spring; 65. Adjusting nut; 66. Connecting rod; 67. Limiting claw; 68. Emergency stop lever; 69. Torsion spring; 610. Positioning rod; 7. Belt groove. Detailed Implementation

[0014] 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. Example 1

[0015] like Figures 1 to 4As shown, a deformation-resistant floating turning tool for machining thin-walled mechanical parts includes a support base 1, a drive cylinder 2, a transmission rod 3, a tool slot 4, a floating turning tool 5, and a drive mechanism 6. The drive cylinder 2 is rotatably connected to the support base 1, and the transmission rod 3 is coaxially rotatably connected inside the drive cylinder 2 and has a length greater than the drive cylinder 2. The tool slot 4 is disposed through one end of the transmission rod 3, and the floating turning tool 5 is inserted into the tool slot 4. The drive mechanism 6 is disposed on the support base 1 and includes a pulley 61, a driven plate 62, a mating cavity 63, a strong spring 64, a pressure adjusting nut 65, and an emergency stop assembly. The belt pulley 61 is coaxially fixed to one end of the drive cylinder 2 and is linked with the external drive equipment through the belt. The driven plate 62 is coaxially slidably connected to the transmission rod 3. The docking cavity 63 is coaxially arranged on one side of the belt pulley 61, and the driven plate 62 abuts in the docking cavity 63. Both the driven plate 62 and the docking cavity 63 have a frustum-shaped structure. The belt pulley 61 and the driven plate 62 are linked by friction. The strong spring 64 is sleeved on the transmission rod 3. The pressure adjusting nut 65 is threaded on the other end of the transmission rod 3, and the strong spring 64 abuts between the driven plate 62 and the pressure adjusting nut 65. A connecting rod 66 is protruding and fixed on the peripheral wall of the transmission rod 3. The connecting rod 66 is slidably engaged with the driven plate 62.

[0016] In this invention, a belt pulley 61 is used, which is linked to an external drive device via a belt, instead of directly driving the tool body with a motor. This avoids the high torque of the motor acting directly on key transmission components. At the same time, the belt pulley 61 and the driven plate 62 are linked by friction, and both are frustum-shaped structures. The transmission torque can be adaptively adjusted by the magnitude of the friction. When the torque exceeds a threshold, relative sliding can occur, preventing deformation of the floating tool 5 or the transmission rod 3 due to excessive torque. This meets the requirement of low-damage transmission for thin-walled part machining. The compression of the powerful spring 64 can be changed by rotating the pressure adjusting nut 65, thereby adjusting the friction between the driven plate 62 and the belt pulley 61, achieving precise control of the transmission torque. Different torques can be adapted to different thin-walled part machining requirements, improving tool versatility and machining accuracy. Example 2

[0017] like Figures 1 to 4 As shown, in addition to all the technical features included in Embodiment 1, this embodiment also includes: The emergency stop assembly includes a connecting rod 66, a limiting pawl 67, and an emergency stop lever 68. The connecting rod 66 is fixed to one side of the support base 1, the limiting pawl 67 is rotatably connected to the connecting rod 66, and the emergency stop lever 68 is fixed to the edge of the pulley 61. One end of the limiting pawl 67 is engaged with the emergency stop lever 68. When it is necessary to stop machining urgently, the limiting pawl 67 can be manipulated to engage the emergency stop lever 68, which can quickly brake the rotation of the pulley 61, thereby stopping the operation of the transmission rod 3 and the floating cutting tool 5, avoiding tool deformation or workpiece damage due to sudden situations, and improving machining safety.

[0018] A torsion spring 69 is fitted on the connecting rod 66. One end of the torsion spring 69 is fixed to the connecting rod 66, and the other end is fixed to the limiting pawl 67. The elastic force of the torsion spring 69 drives the limiting pawl 67 to rotate and reset, ensuring that the locking state between the limiting pawl 67 and the emergency stop rod 68 is stable in the non-emergency stop state.

[0019] A positioning rod 610 is also fixed on the support base 1. The positioning rod 610 abuts against one side of the limiting pawl 67. The positioning rod 610 limits the rotation range of the limiting pawl 67 to prevent the limiting pawl 67 from deviating from its matching position with the emergency stop lever 68 due to excessive rotation. This ensures that the emergency stop assembly is always in an effective working state and further improves the reliability of emergency stop control.

[0020] A belt groove 7 is provided at the center of the peripheral wall of the pulley 61. The cross-section of the belt groove 7 is trapezoidal. Compared with ordinary rectangular grooves, the trapezoidal structure can better adapt to the shape of the belt, increase the contact area between the belt and the belt groove 7, improve the friction between the two, reduce the slippage of the belt during transmission, ensure the power transmission efficiency of the external drive equipment to the pulley 61, indirectly ensure the machining stability of the floating cutting tool 5, and reduce the risk of tool deformation caused by unstable power transmission.

[0021] When using this floating cutting tool, first insert the floating cutting tool 5 into the tool slot 4 at one end of the transmission rod 3 to complete the installation; rotate the adjusting nut 65 at the other end of the transmission rod 3 to change the compression of the strong spring 64, thereby adjusting the friction between the driven plate 62 and the pulley 61 to match the transmission torque required for machining the thin-walled part; before operation, rotate the limiting pawl 67 to separate it from the emergency stop lever 68. At this time, the external drive device drives the pulley 61 to rotate via the belt; the pulley 61 drives the driven plate 62 to rotate through the friction between it and the driven plate 62, ultimately driving the floating cutting tool 5 to rotate, thus realizing the machining of the thin-walled part; if the torque exceeds the threshold during machining, the pulley 61 and the driven plate 62 will slide relative to each other to prevent the part from deforming; When an emergency occurs and processing needs to be stopped, release the limiting claw 67. Under the elastic force of the torsion spring 69, the limiting claw 67 rotates back to its original position, so that one end of it engages with the emergency stop lever 68 on the edge of the pulley 61, thereby braking the pulley 61 to rotate.

[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0023] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A deformation-resistant floating turning tool for machining thin-walled mechanical parts, comprising a support base (1), a drive cylinder (2), a transmission rod (3), a tool slot (4), a floating turning tool (5), and a drive mechanism (6), characterized in that, The drive cylinder (2) is rotatably connected to the support base (1), the transmission rod (3) is coaxially rotatably connected inside the drive cylinder (2) and its length is greater than that of the drive cylinder (2), the tool slot (4) is disposed through one end of the transmission rod (3), the floating cutting tool (5) is inserted into the tool slot (4), and the drive mechanism (6) is disposed on the support base (1) and includes a pulley (61), a driven plate (62), a docking cavity (63), a strong spring (64), a pressure adjusting nut (65), and an emergency stop assembly; The belt pulley (61) is coaxially fixed to one end of the drive cylinder (2) and is linked with the external drive device through the belt. The driven plate (62) is coaxially slidably connected to the transmission rod (3). The docking cavity (63) is coaxially arranged on one side of the belt pulley (61), and the driven plate (62) abuts in the docking cavity (63). Both the driven plate (62) and the docking cavity (63) are frustum-shaped structures. The belt pulley (61) and the driven plate (62) are linked by friction. The strong spring (64) is sleeved on the transmission rod (3). The pressure adjusting nut (65) is threaded on the other end of the transmission rod (3), and the strong spring (64) abuts between the driven plate (62) and the pressure adjusting nut (65).

2. The anti-deformation floating turning tool based on the machining of thin-walled mechanical parts according to claim 1, characterized in that: A connecting rod (66) is fixedly protruding on the peripheral wall of the transmission rod (3), and the connecting rod (66) is slidably engaged with the driven disc (62).

3. The anti-deformation floating turning tool based on the machining of thin-walled mechanical parts according to claim 1, characterized in that: The emergency stop assembly includes a connecting rod (66), a limiting claw (67), and an emergency stop lever (68). The connecting rod (66) is fixed to one side of the support base (1), the limiting claw (67) is rotatably connected to the connecting rod (66), and the emergency stop lever (68) is fixed to the edge of the pulley (61), with one end of the limiting claw (67) engaging with the emergency stop lever (68).

4. The anti-deformation floating turning tool based on the machining of thin-walled mechanical parts according to claim 3, characterized in that: A torsion spring (69) is fitted on the connecting rod (66). One end of the torsion spring (69) is fixed to the connecting rod (66), and the other end is fixed to the limiting claw (67).

5. A deformation-resistant floating turning tool for machining thin-walled mechanical parts according to claim 3, characterized in that: A positioning rod (610) is also fixed on the support base (1), and the positioning rod (610) abuts against one side of the limiting claw (67).

6. The anti-deformation floating turning tool based on the machining of thin-walled mechanical parts according to claim 1, characterized in that: A belt groove (7) is provided at the center of the peripheral wall of the belt pulley (61), and the cross-section of the belt groove (7) is trapezoidal.

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