Rudder part deep hole machining auxiliary device

Abstract

The application discloses a rudder part deep hole machining auxiliary device, which comprises a mounting seat used in cooperation with a deep hole machining machine tool, a control device and a mounting plate fixed on the mounting seat, a plurality of positioning modules arranged on the mounting plate and forming a multi-station deep hole machining platform. The special equipment is automatically centered and positioned on the outer curved surface of the rudder part through cooperation of a V-shaped top seat and a limiting seat, a lateral hydraulic cylinder provides lateral thrust, three sets of clamping hydraulic cylinders drive the pressing arms and the supporting columns to be pressed up and down cooperatively, so that the part is constrained in six degrees of freedom, the control device coordinates synchronous actions of the hydraulic cylinders, and the posture of the part after positioning is stable, thereby avoiding the problems of poor centering and easy deviation of the traditional general fixture when positioning the complex curved surface part, and the technical problem of hole position deviation caused by lack of special equipment in the existing rudder part deep hole machining is solved.

Description

Technical Field

[0001] This invention relates to the technical field of special equipment for deep hole machining of rudder parts, and specifically to an auxiliary device for deep hole machining of rudder parts. Background Technology

[0002] In the deep hole machining process of rudder-type parts, due to the irregular curved surface of the parts, they need to be clamped and positioned on special equipment used with deep hole machining tools to ensure the accuracy of the coincidence between the machining hole position and the tool axis.

[0003] However, existing technologies mostly employ a general-purpose V-block clamping method with a side pressure plate for positioning and clamping. This type of general-purpose clamping is difficult to integrate with deep hole machining tools, and cannot effectively constrain the six degrees of freedom of complex curved surfaces on specialized equipment. In existing technologies, V-blocks can only achieve automatic centering in a single direction, failing to constrain the curved surface of the part simultaneously in horizontal orthogonal directions. This leads to the part easily shifting when subjected to lateral cutting forces, resulting in low repeatability of part positioning during deep hole machining and difficulty in ensuring hole position consistency.

[0004] Therefore, there is an urgent need for a special equipment for deep hole machining of rudder parts that can be used in conjunction with deep hole machining machines. This equipment should be an integrated multi-station positioning platform that enables automated clamping and six-degree-of-freedom constraint of complex curved rudder parts to meet the requirements of hole position accuracy and machining consistency in deep hole machining. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a special equipment for deep hole machining of rudder parts, which addresses the lack of special equipment for deep hole machining machines and the inability of general-purpose fixtures to meet the automated positioning requirements of rudder parts.

[0006] To address the problems mentioned in the background art, the present invention provides an auxiliary device for deep hole machining of rudder parts, including a mounting base for use with a deep hole machining machine tool. A control device is fixedly mounted on the upper surface of the mounting base, and a mounting plate is provided on the side of the control device. Multiple sets of positioning modules for limiting the rudder parts are provided on the upper surface of the mounting plate, and the multiple sets of positioning modules form a multi-station deep hole machining platform on the mounting plate.

[0007] The positioning module includes two sets of L-shaped plates fixedly mounted on the upper surface of the mounting plate. Limiting pins are provided in the gap between the two sets of L-shaped plates. Four sets of support columns are arranged in a matrix on the upper surface of the mounting plate. V-shaped top seats and limiting seats are fixedly mounted on the upper surface of the mounting plate. The V-shaped top seats and limiting seats are located on the outer side of the two sets of support columns on the side away from the L-shaped plates. Lateral hydraulic cylinders are fixedly mounted on the upper surface of the mounting plate. Three sets of clamping hydraulic cylinders and receiving columns are fixedly mounted on the upper surface of the mounting plate. The upper surface of the clamping hydraulic cylinders is provided with a clamping assembly that cooperates with the receiving columns to position the rudder parts. The control device coordinates the synchronous action of each hydraulic cylinder to form a special equipment for deep hole machining of rudder parts.

[0008] Furthermore, the clamping assembly includes a movable column fixedly connected to the piston rod of the clamping hydraulic cylinder. A bracket is fixedly installed on the upper surface of the clamping hydraulic cylinder. A pressure arm is rotatably installed at the top center of the bracket. The top end of the movable column is hinged to the end of the pressure arm. A slide is slidably installed on the inner wall of the end of the pressure arm away from the movable column. A leaf spring is fixedly connected between the upper surface of the slide and the inner wall of the pressure arm. A roller is rotatably installed on the bottom of the slide. An annular groove is formed on the outer surface of the roller.

[0009] Furthermore, the three sets of clamping hydraulic cylinders and limit pins are respectively set on one side of the square formed by the four sets of support columns.

[0010] Furthermore, the receiving column is positioned directly below the end of the pressure arm away from the movable column.

[0011] Furthermore, the three sets of clamping hydraulic cylinders and lateral hydraulic cylinders are supplied with oil through the same oil circuit and are uniformly controlled by the control device to ensure the synchronicity of the actions of each clamping point of the special equipment.

[0012] Furthermore, top pin plates are provided on both sides of the V-shaped top seat and at the center of the limiting seat, and the ends of the top pin plates are configured in the shape of an isosceles trapezoid.

[0013] Furthermore, an adjustment component is provided on one side of the limiting pin to adjust the relative position between the limiting pin and the L-shaped plate, so that the special equipment can adapt to rudder-type parts of different widths or shapes. The adjustment component includes a slot opened on one side of the L-shaped plate. The inner wall of the slot is detachably connected to an insert plate by a mounting bolt. A fixing plate is fixedly connected to the side wall of the insert plate. An adjustment bolt is rotatably installed through the inner wall of the fixing plate. The adjustment bolt is threadedly connected to the inner wall of the limiting pin.

[0014] Furthermore, the fixing plate and the mounting plate are arranged perpendicularly to each other, and there are two sets of both the insert plate and the mounting bolt. The fixing plate and the insert plate are arranged between the two sets of L-shaped plates.

[0015] Furthermore, the limiting pin has a guide assembly inside the side near the center of the mounting plate to facilitate the placement of rudder-type parts into special equipment. The guide assembly includes a retractable cavity formed on the inner wall of the end of the limiting pin. A telescopic rod is fixedly installed on the inner wall of the bottom end of the retractable cavity. An installation head is fixedly connected to the movable end of the telescopic rod. A contact wheel is rotatably installed on the inner wall of the installation head. A spring is fixedly connected between the side wall of the installation head and the inner wall of the bottom end of the retractable cavity.

[0016] Furthermore, the mounting head slides into the inner wall of the contraction cavity, and the size of the contraction cavity is the same as that of the side of the contraction cavity closest to the telescopic rod.

[0017] The present invention, by adopting the above technical solution, can bring the following beneficial effects:

[0018] 1. This invention provides a specialized equipment for deep hole machining of rudder-type parts. It features a positioning module with clamping components. The V-shaped surface of the V-shaped top seat cooperates with the limiting seat to automatically center and position the outer curved surface of the rudder-type part. Simultaneously, lateral hydraulic cylinders provide lateral thrust, and three sets of clamping hydraulic cylinders drive the pressure arm and the receiving column to form vertical clamping, constraining the part in six degrees of freedom. Multiple positioning modules are arranged in a matrix on the mounting plate, forming a multi-station deep hole machining platform in conjunction with the control device. Used in conjunction with a deep hole machining machine, the part maintains a stable posture after positioning, avoiding the problems of poor centering and easy deviation when using traditional general-purpose fixtures for positioning complex curved surface parts. This solves the technical problem of hole position deviation caused by the lack of specialized equipment in existing deep hole machining of rudder-type parts.

[0019] 2. This invention features an adjustment component. The insert plate is detachably connected to the side of the L-shaped plate via mounting bolts. Rotating the adjustment bolts allows the limiting pin to move horizontally relative to the L-shaped plate, changing the depth of the limiting pin's insertion into the gap between the two L-shaped plates. This enables precise adjustment of the limiting boundary position, allowing specialized equipment to adapt to rudder-type parts of different widths or dimensions without replacing the overall positioning module. This solves the technical problems of poor adaptability and inconvenient adjustment of existing positioning devices for parts of different specifications.

[0020] 3. This invention incorporates a guiding component. When a part is placed, the contact wheel at the end of the limiting pin first contacts the side wall of the part. Through rolling guidance, the part smoothly slides into the positioning gap of the special equipment. The telescopic rod and spring work together to allow the mounting head to elastically retract under pressure, providing clearance and preventing the part from getting stuck. At the same time, the spring's counter-force keeps the contact wheel pressed against the side wall of the part, achieving flexible guidance and pre-tightening during the placement process. This solves the technical problem of parts easily scraping or getting stuck with the positioning component during placement. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the mounting plate and positioning module structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the positioning module structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the clamping assembly structure of the present invention;

[0025] Figure 5 This is a cross-sectional view of the end of the pressure arm of the present invention;

[0026] Figure 6 This is a schematic diagram of the adjustment component structure of the present invention;

[0027] Figure 7 This is a cross-sectional view of the limiting pin of the present invention.

[0028] 1. Mounting base; 2. Control device; 3. Mounting plate; 4. Positioning module; 41. L-shaped plate; 42. Limit pin; 43. Support column; 44. V-shaped top seat; 45. Limit seat; 46. Lateral hydraulic cylinder; 47. Clamping hydraulic cylinder; 48. Support column; 49. Pressing assembly; 491. Movable column; 492. Bracket; 493. Pressure arm; 494. Slide; 495. Leaf spring; 496. Roller; 497. Annular arc groove; 5. Adjustment assembly; 51. Slot; 52. Insert plate; 53. Fixing plate; 54. Mounting bolt; 55. Adjusting bolt; 6. Guide assembly; 61. Contraction chamber; 62. Telescopic rod; 63. Mounting head; 64. Contact wheel; 65. Spring. Detailed Implementation

[0029] 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.

[0030] See attached document Figures 1-7 The present invention provides an auxiliary device for deep hole machining of rudder parts, including a mounting base 1, a control device 2 fixedly mounted on the upper surface of the mounting base 1, a mounting plate 3 provided on the side of the control device 2, and a plurality of positioning modules 4 for limiting the rudder parts on the upper surface of the mounting plate 3.

[0031] The positioning module 4 includes two sets of L-shaped plates 41 fixedly installed on the upper surface of the mounting plate 3. A limit pin 42 is provided in the gap between the two sets of L-shaped plates 41. Four sets of support columns 43 are arranged in a matrix on the upper surface of the mounting plate 3. A V-shaped top seat 44 and a limit seat 45 are fixedly installed on the upper surface of the mounting plate 3. The V-shaped top seat 44 and the limit seat 45 are located on the outside of the two sets of support columns 43 on the side away from the L-shaped plates 41. A lateral hydraulic cylinder 46 is fixedly installed on the upper surface of the mounting plate 3. Three sets of clamping hydraulic cylinders 47 and a receiving column 48 are fixedly installed on the upper surface of the mounting plate 3. A clamping assembly 49 is provided on the upper surface of the clamping hydraulic cylinder 47 to cooperate with the receiving column 48 to position the rudder-type parts.

[0032] Mounting base 1 provides a stable mounting platform for control device 2, mounting plate 3 and each positioning module 4, ensuring sufficient overall rigidity of the device during processing. Control device 2 is used to coordinate the action sequence and stroke of each hydraulic cylinder. The mounting plate 3 on its side facilitates the centralized arrangement of positioning modules 4, forming a compact processing station.

[0033] Secondly, the L-shaped plate 41 and the limiting pin 42 cooperate to form a guide boundary, restricting the rotational freedom of the rudder parts in the horizontal plane. The four sets of support columns 43 are distributed in a matrix to support the parts from below and limit their height reference. The V-shaped top seat 44 uses the V-shaped surface to contact the outer curved surface of the rudder parts to achieve automatic centering positioning, while the limiting seat 45 provides reverse abutment from the other side. The two work together to constrain the displacement of the parts in the horizontal orthogonal direction. The lateral hydraulic cylinder 46 provides lateral clamping force to push the parts to press against the V-shaped top seat 44 and the limiting seat 45. The three sets of clamping hydraulic cylinders 47 drive the clamping assembly 49 to press down, forming a clamping force in the vertical direction together with the receiving column 48, thereby completely constraining the rudder parts in a defined position and ensuring that the tool axis and the hole to be processed on the part remain constantly coincident during deep hole machining.

[0034] The clamping assembly 49 includes a movable column 491 fixedly connected to the piston rod of the clamping hydraulic cylinder 47. A bracket 492 is fixedly installed on the upper surface of the clamping hydraulic cylinder 47. A pressure arm 493 is rotatably installed at the top center of the bracket 492. The top end of the movable column 491 is hinged to the end of the pressure arm 493. A slide 494 is slidably installed on the inner wall of the end of the pressure arm 493 away from the movable column 491. A leaf spring 495 is fixedly connected between the upper surface of the slide 494 and the inner wall of the pressure arm 493. A roller 496 is rotatably installed on the bottom of the slide 494. An annular groove 497 is formed on the outer surface of the roller 496.

[0035] When the piston rod of the clamping hydraulic cylinder 47 extends, it pushes the movable column 491 upward. The movable column 491 drives the pressure arm 493 to swing around the rotation center of the top of the bracket 492. By using the lever principle, the linear motion of the hydraulic cylinder is converted into the arc downward pressing motion of the end of the pressure arm 493. The slide 494, which is slidably installed on the inner wall of the far end of the pressure arm 493, can extend and retract within the pressure arm 493. The leaf spring 495 provides elastic cushioning, so that the roller 496 contacts the surface of the rudder part in a floating manner, avoiding rigid impact damage to the part. The annular arc groove 497 opened on the outer surface of the roller 496 is adapted to the convex curved surface of the rudder part, increasing the contact area and preventing the part from sliding laterally during clamping. At the same time, the roller 496 can rotate with the slight movement of the part, reducing the scratching of the part surface during the clamping process.

[0036] The three sets of clamping hydraulic cylinders 47 and the limit pins 42 are respectively set on one side of the square formed by the four sets of support columns 43.

[0037] The three sets of clamping hydraulic cylinders 47 and the limiting pins 42 are respectively arranged at different positions on the four sides of the square formed by the four sets of pillars 43, so that the points of application of clamping force and limiting force are distributed around the square area, and the clamping and limiting loads are evenly distributed from multiple directions to avoid the tilting or deformation of the parts caused by uneven loads. At the same time, it ensures that the center of gravity of the parts is within the support surface of the pillars 43, thereby improving the positioning stability.

[0038] The receiving column 48 is located directly below the end of the pressure arm 493 away from the movable column 491. When the pressure arm 493 is pressed down, the roller 496 is directly aligned with the top surface of the receiving column 48. The clamping force is directly transmitted to the receiving column 48 through the parts, forming a closed loop of force in the vertical direction. This prevents the clamping force from being transmitted to the mounting plate 3 or other weak structures. At the same time, the receiving column 48 serves as a rigid support point, which can counteract the bending moment generated by the thrust of the clamping hydraulic cylinder 47, ensuring a smooth and reliable clamping process.

[0039] The three sets of clamping hydraulic cylinders 47 and lateral hydraulic cylinders 46 are supplied with oil through the same oil circuit, so that each hydraulic cylinder can act synchronously. This ensures that all clamping forces and lateral forces are applied to the part at the same time, avoiding the part from moving around during the positioning process due to sequential actions. The same oil pressure source also ensures that the output force of each cylinder is consistent, ensuring that the force at each clamping point of the part is balanced and reducing clamping deformation caused by uneven force.

[0040] Top pin plates are provided on both sides of the V-shaped top seat 44 and at the center of the limiting seat 45, and the ends of the top pin plates are set in the shape of an isosceles trapezoid.

[0041] The top pin plates on both sides of the V-shaped top seat 44 and the top pin plate at the center of the limiting seat 45 directly contact the surface of the rudder part. The ends are set in an isosceles trapezoidal shape, which can increase the friction between the contact surface and the part. At the same time, the isosceles trapezoidal inclined surface produces a self-centering effect when in contact, guiding the part to automatically center. It can also avoid stress concentration at the tip, protect the surface of the part from being crushed, and adapt to the shape tolerance of the rudder part within a certain size range.

[0042] Please see Figures 6-7 An adjustment component 5 is provided on one side of the limiting pin 42 to adjust the relative position between the limiting pin 42 and the L-shaped plate 41. The adjustment component 5 includes a slot 51 opened on one side of the L-shaped plate 41. An insert plate 52 is detachably connected to the inner wall of the slot 51 by a mounting bolt 54. A fixing plate 53 is fixedly connected to the side wall of the insert plate 52. An adjustment bolt 55 is installed through and rotatably on the inner wall of the fixing plate 53. The adjustment bolt 55 is threadedly connected to the inner wall of the limiting pin 42.

[0043] Insert plate 52 is inserted into slot 51 on the side of L-shaped plate 41 and is detachably fixed by mounting bolt 54 for quick replacement. Fixing plate 53 is fixed to insert plate 52. Adjusting bolt 55 passes through fixing plate 53 and is threaded to limit pin 42. When adjusting bolt 55 is rotated, limit pin 42 moves relative to L-shaped plate 41 along bolt axis, thereby changing the depth of limit pin 42 inserted into the gap between the two L-shaped plates 41, realizing precise fine adjustment of the limit boundary position to adapt to rudder parts of different widths or shapes, without the need to replace the overall positioning module 4.

[0044] The fixing plate 53 is set perpendicularly to the mounting plate 3, and there are two sets of both the insert plate 52 and the mounting bolt 54. The fixing plate 53 and the insert plate 52 are set between the two sets of L-shaped plates 41.

[0045] Ensure that the axis of the adjusting bolt 55 is parallel to the surface of the mounting plate 3, so that the movement direction of the limiting pin 42 is horizontal and perpendicular to the limiting surface of the L-shaped plate 41, ensuring that the limiting pin 42 can still be accurately aligned with the side of the part after adjustment. The two sets of insert plates 52 and mounting bolts 54 are located on both sides of the fixing plate 53, which enhances the connection rigidity between the fixing plate 53 and the L-shaped plate 41 and prevents the fixing plate 53 from deflecting during adjustment or clamping. At the same time, the two sets of bolts share the shear force, improving the reliability of the connection.

[0046] Please see Figure 7 The limiting pin 42 has a guide assembly 6 inside on the side near the center of the mounting plate 3 to facilitate the placement of rudder-type parts. The guide assembly 6 includes a retraction cavity 61 opened on the inner wall of the end of the limiting pin 42. A telescopic rod 62 is fixedly installed on the inner wall of the bottom end of the retraction cavity 61. An installation head 63 is fixedly connected to the movable end of the telescopic rod 62. A contact wheel 64 is rotatably installed on the inner wall of the installation head 63. A spring 65 is fixedly connected between the side wall of the installation head 63 and the inner wall of the bottom end of the retraction cavity 61.

[0047] When the rudder-type parts are inserted, the side wall of the parts first contacts the wheel 64. The contact wheel 64 rolls and guides the parts to slide smoothly into the positioning gap between the limit pins 42, reducing hard scraping. The telescopic rod 62 and the spring 65 work together to make the mounting head 63 retract into the contraction cavity 61 when it is squeezed by the parts, providing elastic clearance and preventing the parts from getting stuck. At the same time, the reaction force of the spring 65 pushes the contact wheel 64 to always keep it close to the parts, achieving flexible guidance and slight pre-tightening.

[0048] The mounting head 63 slides against the inner wall of the contraction cavity 61, and the side of the contraction cavity 61 closest to the telescopic rod 62 is the same size as the contraction cavity 61.

[0049] The mounting head 63 slides against the inner wall of the retraction cavity 61, ensuring that the mounting head 63 maintains a straight trajectory during extension and retraction, preventing the contact wheel 64 from becoming misaligned and losing its guiding function. The inner cavity size of the retraction cavity 61 on the side near the telescopic rod 62 is the same as the rest of the retraction cavity 61, so that the mounting head 63 maintains a uniform clearance fit with the cavity wall when fully retracted, preventing jamming or loosening of the clearance due to sudden size changes, ensuring smooth extension and retraction and accurate reset, and maintaining stable guiding accuracy even after long-term use.

[0050] In use, the mounting base 1 is fixedly installed on the worktable of the deep hole machining machine. Four sets of support columns 43 support the bottom surface of the part from below, initially defining the height reference. During the descent of the part, its side wall first contacts the contact wheel 64 in the guide assembly 6. The contact wheel 64 rolls and guides the part to slide smoothly into the limiting area between the two sets of L-shaped plates 41. At the same time, the telescopic rod 62 cooperates with the spring 65 to make the mounting head 63 elastically retract into the shrinkage cavity 61 when it is pressed, avoiding the part from getting stuck. The counter thrust of the spring 65 keeps the contact wheel 64 close to the side wall of the part, achieving flexible guidance.

[0051] After the part is in place, the control device 2 starts the same oil circuit to supply oil, driving the three sets of clamping hydraulic cylinders 47 and lateral hydraulic cylinders 46 to move synchronously. The lateral hydraulic cylinders 46 extend and push the part toward the V-shaped top seat 44 and the limiting seat 45. The V-shaped surface of the V-shaped top seat 44 automatically aligns with the outer curved surface of the part, and the limiting seat 45 provides reverse abutment. The two work together to constrain the displacement of the part in the horizontal orthogonal direction. At the same time, the piston rod of the clamping hydraulic cylinder 47 pushes the movable column 491 upward. The movable column 491 drives the pressure arm 493 to rotate around the top of the bracket 492. The far end of the pressure arm 493 presses down, causing the roller 496 to press against the upper surface of the part. The receiving column 48 provides corresponding support from below, forming a clamping force in the vertical direction. The annular arc groove 497 on the outer surface of the roller 496 fits with the convex curved surface of the part, increasing contact stability. The leaf spring 495 provides elastic buffering to avoid rigid impact.

[0052] Before machining, the adjusting bolt 55 can be pre-rotated according to the width dimensions of different rudder-type parts, causing the limiting pin 42 to translate horizontally relative to the L-shaped plate 41, changing the depth of the limiting pin 42 extending into the gap between the two L-shaped plates 41, thereby adjusting the position of the limiting boundary to adapt to the part's shape tolerance. After adjustment, all hydraulic cylinders maintain a constant oil supply pressure to ensure that the part is fully constrained in six degrees of freedom. During deep hole machining, the part rotates around its own axis, and the tool feeds along the part's axis to complete the deep hole machining. Multiple positioning modules 4 and control device 2 work together to ensure the stability of the part's posture on this special equipment, keeping the tool axis and the hole to be machined on the part constantly coincident. After machining is completed, the hydraulic cylinders reverse their movement, the pressure arm 493 lifts, and the lateral hydraulic cylinder 46 retracts, allowing the part to be removed.

Claims

1. An auxiliary device for deep hole machining of rudder-type parts, characterized in that, It includes a mounting base (1) for use with a deep hole machining machine tool. A control device (2) is fixedly mounted on the upper surface of the mounting base (1). A mounting plate (3) is provided on the side of the control device (2). Multiple sets of positioning modules (4) for limiting the position of rudder-type parts are provided on the upper surface of the mounting plate (3). Multiple sets of positioning modules (4) form a multi-station deep hole machining platform on the mounting plate (3). The positioning module (4) includes two sets of L-shaped plates (41) fixedly installed on the upper surface of the mounting plate (3). A limit pin (42) is provided in the gap between the two sets of L-shaped plates (41). The upper surface of the mounting plate (3) is provided with four sets of support columns (43) in a matrix. A V-shaped top seat (44) and a limit seat (45) are fixedly installed on the upper surface of the mounting plate (3). The V-shaped top seat (44) and the limit seat (45) are located on the outside of the two sets of support columns (43) on the side away from the L-shaped plate (41). A lateral hydraulic cylinder (46) is fixedly installed on the upper surface of the mounting plate (3). Three sets of clamping hydraulic cylinders (47) and a receiving column (48) are fixedly installed on the upper surface of the mounting plate (3). A clamping assembly (49) is provided on the upper surface of the clamping hydraulic cylinder (47) to cooperate with the receiving column (48) to position the rudder parts. The control device (2) coordinates the synchronous action of each hydraulic cylinder to form a special equipment for deep hole machining of rudder parts.

2. The deep hole machining auxiliary device for rudder-type parts according to claim 1, characterized in that, The clamping assembly (49) includes a movable column (491) fixedly connected to the piston rod of the clamping hydraulic cylinder (47). A bracket (492) is fixedly installed on the upper surface of the clamping hydraulic cylinder (47). A pressure arm (493) is rotatably installed at the top center of the bracket (492). The top end of the movable column (491) is hinged to the end of the pressure arm (493). A slide (494) is slidably installed on the inner wall of the end of the pressure arm (493) away from the movable column (491). A leaf spring (495) is fixedly connected between the upper surface of the slide (494) and the inner wall of the pressure arm (493). A roller (496) is rotatably installed on the bottom of the slide (494). An annular groove (497) is opened on the outer surface of the roller (496).

3. The deep hole machining auxiliary device for rudder-type parts according to claim 2, characterized in that, The three sets of clamping hydraulic cylinders (47) and limit pins (42) are respectively set on one side of the square formed by the four sets of support columns (43).

4. The deep hole machining auxiliary device for rudder-type parts according to claim 3, characterized in that, The receiving column (48) is located directly below the end of the pressure arm (493) away from the movable column (491).

5. The deep hole machining auxiliary device for rudder-type parts according to claim 4, characterized in that, The clamping hydraulic cylinder (47) and the lateral hydraulic cylinder (46) of the three sets of cylinders are supplied with oil through the same oil circuit.

6. The deep hole machining auxiliary device for rudder-type parts according to claim 5, characterized in that, Top pin plates are provided on both sides of the V-shaped top seat (44) and at the center of the limiting seat (45), and the ends of the top pin plates are set in the shape of an isosceles trapezoid.

7. The deep hole machining auxiliary device for rudder-type parts according to claim 6, characterized in that, An adjustment component (5) is provided on one side of the limiting pin (42) to adjust the relative position between the limiting pin (42) and the L-shaped plate (41). The adjustment component (5) includes a slot (51) opened on one side of the L-shaped plate (41). The inner wall of the slot (51) is detachably connected to a plate (52) by a mounting bolt (54). A fixing plate (53) is fixedly connected to the side wall of the plate (52). An adjustment bolt (55) is installed through and rotatably on the inner wall of the fixing plate (53). The adjustment bolt (55) is threadedly connected to the inner wall of the limiting pin (42).

8. The deep hole machining auxiliary device for rudder-type parts according to claim 7, characterized in that, The fixing plate (53) is set perpendicularly to the mounting plate (3), and there are two sets of insert plates (52) and mounting bolts (54). The fixing plate (53) and insert plates (52) are set between the two sets of L-shaped plates (41).

9. The deep hole machining auxiliary device for rudder-type parts according to claim 8, characterized in that, The limiting pin (42) has a guide assembly (6) inside on the side near the center of the mounting plate (3) to facilitate the placement of rudder-type parts. The guide assembly (6) includes a contraction cavity (61) opened on the inner wall of the end of the limiting pin (42). A telescopic rod (62) is fixedly installed on the inner wall of the bottom end of the contraction cavity (61). An installation head (63) is fixedly connected to the movable end of the telescopic rod (62). A contact wheel (64) is rotatably installed on the inner wall of the installation head (63). A spring (65) is fixedly connected between the side wall of the installation head (63) and the inner wall of the bottom end of the contraction cavity (61).

10. The deep hole machining auxiliary device for rudder-type parts according to claim 9, characterized in that, The mounting head (63) slides against the inner wall of the contraction cavity (61), and the size of the contraction cavity (61) on the side near the telescopic rod (62) is the same as that of the contraction cavity (61).

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