Rudder cone machining tooling

Abstract

The utility model relates to a rudder blade taper hole processing frock, including the flat rotation disc that drives rotation through numerical control machine tool, the flat rotation disc includes the swivel body and is used to install the slide ram of processing tool, the flat rotation disc still includes the counterweight, the side end face of counterweight near swivel body is opened to avoid the groove, the slide ram slidingly is established in the avoiding groove, on the axial projection of flat rotation disc, counterweight has first circular arc line section, first straight line section, second straight line section and third straight line section on the axial projection, the rudder blade taper hole processing frock of the utility model will counterweight be directly fixed on the swivel body of flat rotation disc through bolt, can effectively restrain the tiny displacement or vibration that can produce in the process that flat rotation disc starts, stops or changes speed, counterweight adopts the appearance design of outside circular arc shape, inside square, namely, conveniently counterweight gyration radius control, can also accurately position the gravity center of counterweight to better with slide ram and processing tool gravity center match, realize the accurate dynamic balance of whole flat rotation disc.

Description

Technical Field

[0001] This utility model relates to the field of rudder blade machining technology, and in particular to a tooling for machining tapered holes in rudder blades. Background Technology

[0002] Machining the rudder blade's tapered hole requires the combined use of a CNC machine tool and a CNC rotary table. The CNC rotary table is mounted on the CNC axis of the CNC machine tool. By controlling the sliding position of the ram, the tool mounted on the ram is radially fed to the diameter of the rudder blade's tapered hole. Then, the CNC axis of the CNC machine tool drives the CNC rotary table, which has completed the tool position adjustment, to feed axially and rotate, completing the machining of the rudder blade's tapered hole. Because the ram of the CNC rotary table drives the tool radially, it disrupts the overall mass balance, causing the center of gravity and rotation center of the CNC rotary table to misalign. During high-speed rotation, centrifugal force and vibration are easily generated, causing the actual tool trajectory to deviate from the theoretically programmed path, resulting in a loss of shape accuracy in the rudder blade's tapered hole.

[0003] Chinese utility model patent CN204747586U discloses a rotary disc with a groove on its rotating body. A counterweight is placed within the groove, and the counterweight is adjusted for transmission with a movable tool holder mechanism via a transmission gear and a transmission rack. While this rotary disc improves the stability of rotation to some extent, a meshing gap inevitably exists between the transmission gear and the transmission rack. Under the cutting force of the tool, this meshing gap causes the counterweight to experience slight impacts and lag, affecting the balance and stability. Furthermore, the movement range of the counterweight needs to match the movement range of the movable tool holder mechanism. To balance the tool at its maximum stroke, the counterweight also needs the same stroke length, which directly limits the minimum inner diameter of the rotary disc, or in other words, limits the maximum extension of the tool given the diameter of the rotary disc.

[0004] Therefore, this utility model proposes a tooling for machining the tapered hole of the rudder blade to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a tooling for machining the tapered hole of the rudder blade, which can ensure the stability of the high-speed rotation of the rotary table during the machining process, and will not restrict the radial feed of the tool on the rotary table.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a tooling for machining a rudder blade tapered hole, including a rotary table driven to rotate by a CNC machine tool. The rotary table includes a rotating body and a slide for mounting machining tools. A groove matching the slide is opened on the end face of the rotating body. The slide is slidably disposed in the groove and moves between the initial position and the machining station. Its innovation is that the rotary table also includes a counterweight. The counterweight is detachably mounted on the rotating body at an initial position away from the machining station by bolts. A clearance groove is formed on the end face of the counterweight near the rotating body, and the slide block is slidably disposed within the clearance groove. On the axial projection of the rotary disc, the counterweight has a first arc segment, a first straight segment, a second straight segment, and a third straight segment. The first arc segment is located on the side of the third straight segment away from the center of the rotating body. The center of the first arc segment coincides with the center of the rotating body on the axial projection. The straight line connecting the center of the first arc segment and the center of the rotating body on the axial projection is defined as the reference line. The reference line is parallel to the direction of movement of the slide block, and the axial projection of the slide block has a symmetrical structure about the reference line. The third straight segment is perpendicular to the reference line. The first and second straight segments are located between the first arc segment and the third straight segment. Both the first and second straight segments are parallel to the reference line. The first arc segment, the first straight segment, the second straight segment, and the third straight segment cooperate to form a closed first contour line. The counterweight has a symmetrical structure about the reference line on the axial projection.

[0007] Furthermore, the axial projection of the slide block has two second arc segments and two fourth straight segments. The two second arc segments and the two fourth straight segments cooperate to form a closed second contour line. The two second arc segments are centrally symmetrical about the center of the axial projection of the slide block, and the two fourth straight segments are centrally symmetrical about the center of the axial projection of the slide block. The radius of the second arc segment is smaller than the radius of the first arc segment.

[0008] Furthermore, a machining tool is installed on the side of the slide away from the counterweight. When the slide is in the machining position, the machining tool rotates synchronously with the rotating body, and the radius of rotation of the machining tool tip is greater than the radius of the first arc segment.

[0009] Furthermore, on the axial projection of the rotary table, the centers of gravity of the counterweight, the slide block, and the machining tool are all located on the baseline.

[0010] Furthermore, when the slide moves to the machining station, the sum of the torque of the machining tool and the torque of the slide is equal to the torque of the counterweight.

[0011] The advantages of this utility model are: The tooling for machining the rudder taper hole of this utility model directly fixes the counterweight to the rotating body of the rotary table with bolts. This can effectively suppress the slight displacement or vibration that may occur during the start-up, stop or speed change of the rotary table. By opening a clearance groove on the counterweight, interference with the movement of the slide block is avoided. The counterweight adopts an outer arc shape and an inner square shape, which not only facilitates the control of the counterweight's rotation radius, but also allows for precise positioning of the counterweight's center of gravity, thereby better matching the center of gravity of the slide block and the machining tool, and achieving precise dynamic balance of the entire rotary table.

[0012] The radius of the second arc segment of the slide block in this invention is smaller than the radius of the first arc segment. This design can remove the size restriction of the slide block on the size of the counterweight block, and the torque requirement can be met by using the method of extending the lever arm of the counterweight block and selecting a counterweight block with a smaller counterweight.

[0013] The radius of rotation of the cutting tool tip of this invention is greater than the radius of the first arc segment, which can effectively avoid the interference of the counterweight when the cutting tool is machining the rudder blade tapered hole.

[0014] In this invention, the center of gravity of the counterweight, slide block, and machining tool are all located on the baseline, transforming the complex torque balance into a simple axial force balance, which facilitates convenient counterweight selection and precise torque control.

[0015] This invention can determine the corresponding counterweight selection based on the calculation of the torque of the machining tool and the torque of the slide block. The calculation is simple and facilitates the standardized selection of counterweights. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a schematic diagram of the tooling for machining the rudder blade tapered hole of this utility model.

[0018] Figure 2 This is a front view of the counterweight block of this utility model.

[0019] Figure 3 This is a right view of the counterweight block of this utility model.

[0020] Figure 4 This is a front view of the slide of this utility model. Detailed Implementation

[0021] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0022] Example This embodiment provides a tooling for machining the tapered hole of a rudder blade, such as... Figure 1-4As shown, the device includes a rotary table driven to rotate by a CNC machine tool. The rotary table includes a rotating body 1, a ram 2 for mounting machining tools, and a counterweight 3. The rotating body 1 is mounted on the spindle of the CNC machine tool and is driven to rotate by the spindle. A groove matching the ram 2 is formed on the end face of the rotating body 1 on the side away from the CNC machine tool. The ram 2 is slidably disposed within the groove and moves between its initial position and the machining station. The counterweight 3 is detachably mounted on the rotating body 1 on the side of its initial position away from the machining station by bolts. A clearance groove 301 is formed on the end face of the counterweight 3 near the rotating body 1, and the ram 2 is slidably disposed within the clearance groove 301.

[0023] On the axial projection of the flat disc, the counterweight 3 has a first arc segment 3a, a first straight line segment 3b, a second straight line segment 3d, and a third straight line segment 3c. The first arc segment 3a is located on the side of the third straight line segment 3c away from the center of the rotating body 1. The center of the first arc segment 3a coincides with the center O of the rotating body 1 on the axial projection. The straight line connecting the center A of the first arc segment 3a and the center O of the rotating body 1 on the axial projection is defined as the reference line L. The reference line L is parallel to the direction of movement of the slide block 2, and the axial projection of the slide block 2 has a symmetrical structure about the reference line L. The third straight line segment 3b... c is perpendicular to the baseline L. The first straight line segment 3b and the second straight line segment 3d are located between the first arc segment 3a and the third straight line segment 3c. The first straight line segment 3b and the second straight line 3d are both parallel to the baseline L. The two ends of the first straight line segment 3b are connected to the first arc segment 3a and the third straight line segment 3c, respectively. The two ends of the second straight line segment 3d are connected to the first arc segment 3a and the third straight line segment 3c, respectively. The first arc segment 3a, the first straight line segment 3b, the second straight line segment 3d and the third straight line segment 3c cooperate to form a closed first contour line. The counterweight 3 has a symmetrical structure about the baseline L in the axial projection.

[0024] In this embodiment, the axial projection of the slide 2 has two second circular arc segments 2a and two fourth straight line segments 2b. The two second circular arc segments 2a and the two fourth straight line segments 2b cooperate to form a closed second contour line. The two second circular arc segments 2a and the two fourth straight line segments 2b are centrally symmetrical about the center B of the axial projection of the slide 2. The radius of the second circular arc segment 2a is smaller than the radius of the first circular arc segment 3a. The design of the slide 2 can remove the size restriction of the counterweight block on the slide 2 size, and the torque requirement can be met by using an extended lever arm of the counterweight block and selecting a smaller counterweight block.

[0025] A machining tool is installed on the side of the slide block 2 away from the counterweight 3. When the slide block 2 is in the machining position, the machining tool rotates synchronously with the rotating body 1. The radius of rotation R of the machining tool tip is greater than the radius of the first arc segment 3a, which can effectively avoid the counterweight interference when the machining tool is machining the rudder blade tapered hole.

[0026] On the axial projection of the rotary table, the centers of gravity of counterweight 3, slide 2, and machining tool are all located on the baseline L, transforming the complex torque balance into a simple axial force balance. This facilitates convenient counterweight selection and precise torque control. When slide 2 is in its initial position, its center B coincides with the center O of rotating body 1. When slide 2 moves to the machining position, the sum of the torque of the machining tool and the torque of slide 2 equals the torque of counterweight 3. Based on the calculation of the torque of the machining tool and the torque of slide 2, the corresponding counterweight selection can be determined. The calculation is simple and facilitates standardized counterweight selection. When machining rudder blade tapered holes of different sizes, the displacement of the machining tool changes with the movement of slide 2. Based on torque calculation, counterweights of the same material but different thicknesses, or counterweights of the same thickness but different materials, can be selected to meet the dynamic balance requirement that the sum of the torque of the machining tool and the torque of slide 2 equals the torque of counterweight 3.

[0027] The rudder blade tapered hole machining fixture directly fixes the counterweight 3 to the rotating body 1 of the rotary table with bolts. This can effectively suppress the small displacements or vibrations that may occur during the start-up, stop, or speed change of the rotary table. By opening a clearance groove 301 on the counterweight 3, interference with the movement of the slide block 2 is avoided. The counterweight 3 adopts an outer arc shape and an inner square shape design, which not only facilitates the control of the counterweight's rotation radius, but also allows for precise positioning of the counterweight 3's center of gravity, thereby better matching the center of gravity of the slide block 3 and the machining tool, and achieving precise dynamic balance of the entire rotary table.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A tooling for machining a rudder blade tapered hole, comprising a rotary table driven to rotate by a CNC machine tool, the rotary table including a rotating body and a ram for mounting machining tools, the end face of the rotating body having a groove matching the ram, the ram being slidably disposed within the groove and moving between an initial position and a machining station, characterized in that: The rotary disc also includes a counterweight; The counterweight is detachably mounted on the rotating body at an initial position away from the machining station by bolts. A clearance groove is formed on the end face of the counterweight near the rotating body, and the slide block is slidably disposed within the clearance groove. On the axial projection of the rotary disc, the counterweight has a first arc segment, a first straight segment, a second straight segment, and a third straight segment. The first arc segment is located on the side of the third straight segment away from the center of the rotating body. The center of the first arc segment coincides with the center of the rotating body on the axial projection. The straight line connecting the center of the first arc segment and the center of the rotating body on the axial projection is defined as the reference line. The reference line is parallel to the direction of movement of the slide block, and the axial projection of the slide block has a symmetrical structure about the reference line. The third straight segment is perpendicular to the reference line. The first and second straight segments are located between the first arc segment and the third straight segment. Both the first and second straight segments are parallel to the reference line. The first arc segment, the first straight segment, the second straight segment, and the third straight segment cooperate to form a closed first contour line. The counterweight has a symmetrical structure about the reference line on the axial projection.

2. The tooling for machining the rudder blade tapered hole according to claim 1, characterized in that: The axial projection of the slide block has two second arc segments and two fourth straight segments. The two second arc segments and the two fourth straight segments cooperate to form a closed second contour line. The two second arc segments are centrally symmetrical about the center of the axial projection of the slide block, and the two fourth straight segments are centrally symmetrical about the center of the axial projection of the slide block. The radius of the second arc segment is smaller than the radius of the first arc segment.

3. The tooling for machining the rudder blade tapered hole according to claim 2, characterized in that: A machining tool is installed on the side of the slide away from the counterweight. When the slide is in the machining position, the machining tool rotates synchronously with the rotating body. The radius of rotation of the machining tool tip is greater than the radius of the first arc segment.

4. The tooling for machining the rudder blade tapered hole according to claim 3, characterized in that: On the axial projection of the rotary table, the centers of gravity of the counterweight, the slide, and the machining tool are all on the baseline.

5. The tooling for machining the rudder blade tapered hole according to claim 4, characterized in that: When the slide moves to the machining station, the sum of the torque of the machining tool and the torque of the slide is equal to the torque of the counterweight.

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