Inertial platform frame workpiece inner cavity groove and hole processing device and processing method

Abstract

This invention relates to a machining apparatus and method for machining grooves and holes in the inner cavity of an inertial platform frame workpiece, belonging to the field of precision machining technology. The machining apparatus includes a main spindle connecting rod, a small spindle connecting rod 8, and a small spindle, driven by a machine tool spindle. The overall length of the machining apparatus can be adjusted to fit the inner cavity of the workpiece by moving bolts within a locking groove. During machining, the machining apparatus is first installed and adjusted to the required length. The verticality of the small spindle is then checked using a mandrel and a dial indicator. The workpiece is then clamped onto the worktable. By controlling the rotation angle of the machine tool spindle, the small spindle and its cutting tool are driven to sequentially machine the cross groove at the bottom of the workpiece's inner cavity, the 45° inclined grooves on the bottom and top sides, and the holes at the bottom of each groove. This invention has a simple structure, good rigidity, and can complete the machining of complex features in multiple directions of the inner cavity in a single clamping operation, significantly improving machining efficiency, reducing the cost of specialized tooling, and offering strong versatility.

Description

Technical Field

[0001] This invention relates to the field of precision machining technology, specifically to a machining apparatus and method for machining grooves and holes in the inner cavity of an inertial platform frame workpiece. Background Technology

[0002] The large inertial platform framework is a key component of large navigation-related applications, such as... Figure 1 , Figure 2 As shown, this type of workpiece structure is commonly used in navigation platform systems. However, this type of workpiece often has grooves and holes in its internal cavity, and the general machining method is to use specialized equipment equipped with different angle heads. Because this type of workpiece has many internal grooves and holes, it requires a large number of equipment and angle heads, resulting in high economic costs. At the same time, frequent changes of equipment and angle heads lead to a decrease in workpiece machining efficiency. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a machining device for the internal cavity grooves and holes of an inertial platform frame workpiece. This device integrates the main spindle connecting rod, the small spindle connecting rod, and the small spindle, and features length adjustment. A single clamping operation can continuously complete the machining of multiple features of various directions and types, such as the bottom cross groove, multiple side inclined grooves, and groove bottom holes of the workpiece. This completely avoids repeated disassembly, reassembly, and tool resetting between processes, integrating complex multi-process machining into a continuous flow. This significantly improves machining efficiency and solves the problems of traditional machining methods that require multiple specialized devices and frequent angle head changes, resulting in cumbersome and time-consuming processes.

[0004] A machining method for machining grooves and holes in the inner cavity of a workpiece using an inertial platform frame is also provided. The steps are clear, precise, and repeatable. This method reduces over-reliance on operator experience and improves process standardization and repeatability. All machining can be completed in a single alignment, ensuring the relative positional accuracy between machining features and resulting in stable and reliable product quality.

[0005] The technical problem solved by this invention is achieved through the following technical solution: A machining device for internal cavity grooves and holes of an inertial platform frame workpiece includes a main spindle connecting rod, a small main spindle connecting rod, and a small main spindle. The small main spindle is mounted on the small main spindle connecting rod, the small main spindle connecting rod is mounted on the main spindle connecting rod, and the main spindle connecting rod is mounted on the machine tool spindle. The machine tool spindle drives the main spindle connecting rod and the small main spindle connecting rod to rotate, and drives the small main spindle to rotate. A machining tool mounted on the small main spindle performs machining on the workpiece.

[0006] Furthermore, the spindle connecting rod includes a guide rod at the front end and a tool holder at the rear end. The guide rod is mounted on the small spindle connecting rod, and the tool holder is used to mount the machine tool spindle; the diameter of the guide rod is [missing information]. The optical rod has a diameter of 70±0.02mm and a length of 520mm. Several threaded through holes are arranged in a radial array on the optical rod, and the optical rod is installed on the small spindle connecting rod through the several threaded through holes.

[0007] Furthermore, the small spindle connecting rod includes a small spindle mounting block at the front end and a cylinder at the rear end. The small spindle mounting block is used to mount the small spindle, and the cylinder is used to mount the spindle connecting rod.

[0008] Furthermore, the end of the small spindle mounting block away from the cylinder is provided with a small spindle mounting end face. Several threaded holes are symmetrically arrayed on the small spindle mounting end face, with a threaded hole depth of 20mm. The small spindle is mounted on the small spindle mounting end face through the several threaded holes. The flatness of the small spindle mounting end face is less than 0.002mm.

[0009] Furthermore, the cylinder has a spindle connecting rod insertion hole at its center, and the outer circumference of the cylinder has symmetrically arranged cutting surfaces. Several locking grooves are symmetrically arranged on the cutting surfaces along the radial direction of the cylinder. The spindle connecting rod is movably installed in the spindle connecting rod insertion hole. The position of the spindle connecting rod in the spindle connecting rod insertion hole is adjusted by the several locking grooves, and it is locked and fixed by bolts.

[0010] A machining method for a workpiece internal cavity groove and hole machining device utilizing an inertial platform frame includes the following steps: Step 1: Install the processing equipment. Install the smooth rod of the spindle connecting rod into the spindle connecting rod insertion hole. Screw the bolts into the locking groove and the threaded through hole on the smooth rod respectively. Move the bolts in the locking groove to adjust the position of the smooth rod in the spindle connecting rod insertion hole. After adjustment, tighten the bolts to fix it. Screw the bolts into the threaded holes and the threaded holes of the small spindle respectively, and install the small spindle on the mounting end face of the small spindle; Step 2: Debug the processing equipment: After the machining device is installed, connect the tool holder of the spindle connecting rod to the machine tool spindle; Adjusting the perpendicularity of the small spindle using the machine tool spindle orientation function: Adjust the diameter of the small spindle... Install the 8mm, 100mm long mandrel onto the small spindle, adjust the spindle rotation angle and use the machine tool Z-axis lifting function and dial indicator (19) to adjust the mandrel to a vertical state, straighten the mandrel, and remove the mandrel to install the machining tool after straightening the mandrel; Step 3: Install the workpiece: The workpiece is mounted onto the machine tool table via a pressure plate, with the bottom of the workpiece's inner cavity located at the top of the machine tool table; Step 4: Process the workpiece: (1) Machining the cross groove at the bottom of the workpiece's inner cavity: Use the machine tool spindle to rotate the small spindle to a position perpendicular to the bottom of the workpiece's inner cavity, and then use... An 8mm milling cutter was used to machine the cross groove at the bottom of the workpiece's inner cavity. (2) Machining two 45° inclined grooves on the bottom side of the inner cavity of the workpiece and two grooves at the bottom of each groove. 8 holes survive: Using the machine tool spindle, rotate the 2.2KW small spindle to a position perpendicular to two 45° inclined planes on the bottom side of the workpiece, respectively using... 8mm end mill and The workpiece was successfully machined using an 8mm drill bit. (3) Machining two 45° inclined grooves on the top side of the inner cavity of the workpiece and two grooves at the bottom of each groove. 8 holes survive: Using the machine tool spindle, rotate the 2.2KW small spindle to a position perpendicular to two 45° inclined planes on the top side of the workpiece, respectively using... 8mm end mill and The workpiece was successfully machined using an 8mm drill bit. The cross grooves, beveled grooves, and holes inside the workpiece are now machined.

[0011] The advantages and positive effects of this invention are: 1. The processing device for the inner cavity groove and hole of the inertial platform frame workpiece of the present invention has a simple structure, reliable connection, and strong versatility in operation, which helps to improve processing efficiency and save processing costs.

[0012] 2. This invention uses an integrated device to combine the main spindle connecting rod, the small spindle connecting rod, and the small spindle, and has a length adjustment function. A single clamping operation can continuously complete the machining of multiple features of various directions and types, such as the cross groove at the bottom of the workpiece's inner cavity, multiple side inclined grooves, and groove bottom holes. This completely avoids repeated disassembly, reassembly, and tool resetting between processes, integrating complex multi-process machining into a continuous flow. This significantly improves machining efficiency and solves the problems of traditional machining methods that require multiple specialized devices and frequent angle head changes, resulting in cumbersome and time-consuming processes.

[0013] 3. The processing device for the inner cavity groove and hole of the inertial platform frame workpiece of the present invention is made of titanium alloy. The overall weight does not exceed 20KG and will not damage the precision performance of the machine tool. While achieving lightweight, it ensures excellent overall rigidity, effectively suppresses vibration and deformation during processing, and provides a stable foundation for high-precision processing.

[0014] 4. The present invention relates to a machining device for the inner cavity grooves and holes of an inertial platform frame workpiece. The guide rod of the spindle connecting rod is moved and installed in the insertion hole of the spindle connecting rod. Bolts are screwed into the locking groove and the through hole on the guide rod respectively. The bolts move in the locking groove to adjust the position of the guide rod in the insertion hole of the spindle connecting rod. The adjustable length design allows the machining device to accurately adapt to different inner cavity sizes, which can avoid interference and collision, and prevent the problem of reduced rigidity caused by excessive overhang. While improving process adaptability, it also protects the machine tool spindle from damage.

[0015] 5. This invention utilizes a machining method for machining grooves and holes in the inner cavity of a workpiece using an inertial platform frame. The steps are clear, precise, and repeatable. This machining method reduces over-reliance on operator experience and improves the standardization and repeatability of the process. All machining can be completed after a single alignment, ensuring the relative positional accuracy between each machining feature and resulting in stable and reliable product quality.

[0016] 6. The machining device and machining method for the inner cavity grooves and holes of the inertial platform frame workpiece of the present invention can meet the requirements of the workpiece drawing, and at the same time increase the machining dimensions of the CNC machine tool, significantly improving the machining accuracy and machining efficiency of the workpiece. Attached Figure Description

[0017] Figure 1 Three-dimensional workpiece for inertial platform frame Figure 1 ; Figure 2 Three-dimensional workpiece for inertial platform frame Figure 2 ; Figure 3 This is a schematic diagram of the spindle connecting rod structure of the machining device for the inner cavity groove and hole of the inertial platform frame workpiece of the present invention; Figure 4 This is a schematic diagram of the small spindle connecting rod structure of the machining device for the inner cavity grooves and holes of the inertial platform frame workpiece of the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the small spindle connecting rod structure of the machining device for the inner cavity grooves and holes of the inertial platform frame workpiece of the present invention. Figure 2 ; Figure 6 This is a schematic diagram of the small spindle structure of the machining device for the inner cavity grooves and holes of the inertial platform frame workpiece of the present invention; Figure 7 The main spindle connecting rod and the small spindle connecting rod are installed in the machining device for the inner cavity groove and hole of the inertial platform frame workpiece of the present invention. Figure 1 ; Figure 8 The main spindle connecting rod and the small spindle connecting rod are installed in the machining device for the inner cavity groove and hole of the inertial platform frame workpiece of the present invention. Figure 2 ; Figure 9 This is a diagram showing the main spindle connecting rod, the small spindle connecting rod, and the small spindle installation of the machining device for the inner cavity groove and hole of the workpiece of the inertial platform frame of the present invention. Figure 10 This is a diagram showing the machining device and machine tool spindle installation for machining the inner cavity grooves and holes of the inertial platform frame workpiece of the present invention. Figure 11 This is a schematic diagram of the adjustment of the machining device for the inner cavity groove and hole of the inertial platform frame workpiece of the present invention; Figure 12 A schematic diagram of the workpiece installation for the machining device of the inner cavity groove and hole of the inertial platform frame workpiece of the present invention; Figure 13 This is a schematic diagram of the machining of the cross groove at the bottom of the inner cavity of the workpiece according to the present invention; Figure 14 The present invention comprises a 45° inclined groove on the bottom side of the inner cavity of the workpiece and four groove bottoms. Schematic diagram of 8-hole machining; Figure 15 The present invention comprises four 45° inclined grooves on the top side of the inner cavity of the workpiece and four groove bottoms. Schematic diagram of 8-hole machining; In the picture: 1- Inclined groove, 2- Hole, 3- Cross groove, 4- Spindle connecting rod, 5- Polished rod, 6- Threaded through hole, 7- Tool holder, 8- Small spindle connecting rod, 9- Small spindle mounting block, 10- Small spindle mounting end face, 11- Threaded hole, 12- Cylinder, 13- Cutting surface, 14- Locking groove, 15- Spindle connecting rod insertion hole, 16- Small spindle, 17- Machine tool spindle, 18- Mandrel, 19- Dial indicator, 20- Worktable, 21- Pressure plate, 22- Workpiece. Detailed Implementation

[0018] The present invention will be further described in detail below through specific embodiments. The following embodiments are merely descriptive and not limiting, and should not be used to limit the scope of protection of the present invention.

[0019] like Figures 8 to 10 As shown, a machining device for the inner cavity groove and hole of an inertial platform frame workpiece includes a main spindle connecting rod 4, a small spindle connecting rod 8, and a small spindle 16. The small spindle 16 is mounted on the small spindle connecting rod 8, the small spindle connecting rod 8 is mounted on the main spindle connecting rod 4, and the main spindle connecting rod 4 is mounted on the machine tool spindle 17. The machine tool spindle 17 drives the main spindle connecting rod 4 and the small spindle connecting rod 8 to rotate, and drives the small spindle 16 to rotate. The machining tool mounted on the small spindle 16 performs machining on the workpiece 22.

[0020] like Figure 3 As shown, the main spindle connecting rod 4 includes a diameter located at the front end. The guide rod 5, which is 70±0.02mm in diameter and 520mm in length, and the BT60 tool holder 7 located at the rear end are mounted on the small spindle connecting rod 8. The tool holder 7 is connected to the CNC machine tool spindle 17. The guide rod 5 has three M16 threaded through holes 6 arranged in a radial direction. The guide rod 5 is mounted on the small spindle connecting rod 8 through the three M16 threaded through holes 6.

[0021] like Figures 4 to 7 As shown, the small spindle connecting rod 8 includes a small spindle mounting block 9 at the front end and a cylinder 12 at the rear end. The small spindle mounting block 9 is used to mount the small spindle 16, and the cylinder 12 is used to mount the spindle connecting rod 4.

[0022] The end of the small spindle mounting block 9 away from the cylinder 12 is provided with a small spindle mounting end face 10, the flatness of the small spindle mounting end face 10 is less than 0.002mm; eight M8 threaded holes 11 are symmetrically arranged on the small spindle mounting end face 10, the threaded holes 11 are 20mm deep, and the threaded holes 11 correspond one-to-one with the threaded holes 11 of the 2.2KW small spindle 16. The eight M8 bolts are screwed into the eight M8 threaded holes 11 and the threaded holes 11 of the 2.2KW small spindle 16 respectively, and the 2.2KW small spindle 16 is installed on the small spindle mounting end face 10.

[0023] A spindle connecting rod insertion hole 15 is located at the center of the cylinder 12. A cutting surface 13 is symmetrically arranged on the outer circumference of the cylinder 12. The cutting surface 13 is parallel to the left and right sides of the small spindle mounting block 9. Six locking grooves 14 are symmetrically arranged on the cutting surface 13 along the radial direction of the cylinder 12. Each locking groove 14 is 100mm long. The smooth rod 5 of the spindle connecting rod 4 is moved and installed in the spindle connecting rod insertion hole 15 with a clearance of 0.02mm. Six M16 bolts are screwed into the six locking grooves 14 and the M16 threaded through holes 6 on the smooth rod 5. The M16 bolts move in the locking grooves 14 to adjust the position of the smooth rod 5 in the spindle connecting rod insertion hole 15. After adjustment, the M16 bolts are locked and fixed. The adjustable length design allows the processing device to precisely adapt to different internal cavity sizes, avoiding interference and collisions, and preventing the problem of reduced rigidity caused by excessive overhang. While improving process adaptability, it also protects the precision of the machine tool spindle 17 from damage.

[0024] The small spindle 16 is a 2.2KW small spindle 16 with a rotation speed of 6000 rpm. The machining tools mounted on the small spindle 16 are replaceable. An 8mm standard milling cutter or drill bit is used to machine the cross groove 3, the inclined groove 1, and the hole in the inner cavity of workpiece 22.

[0025] The present invention relates to a machining device for the inner cavity grooves and holes of an inertial platform frame workpiece. The entire device is made of titanium alloy, which ensures stable machining rigidity. The overall weight does not exceed 20KG and will not damage the precision performance of the machine tool. While achieving lightweighting, it ensures excellent overall rigidity, effectively suppresses vibration and deformation during machining, and provides a stable foundation for high-precision machining.

[0026] Working principle of this invention: Install the smooth rod 5 of the spindle connecting rod 4 into the spindle connecting rod insertion hole 15. Screw the 6 M16 bolts into the 6 locking grooves 14 and the M16 threaded through holes 6 on the smooth rod 5 respectively. Move the M16 bolts in the locking grooves 14 to adjust the position of the smooth rod 5 in the spindle connecting rod insertion hole 15. After adjustment, lock and fix it with M16 bolts.

[0027] Screw eight M8 bolts into eight M8 threaded holes 11 and the threaded hole 11 of the 2.2KW mini spindle 16 respectively. Install the 2.2KW mini spindle 16 on the mini spindle mounting end face 10. Install a standard milling cutter or drill bit on the 2.2KW mini spindle 16.

[0028] The BT60 tool holder 7 of the spindle connecting rod 4 is connected to the machine tool spindle 17. The machine tool spindle 17 drives the spindle connecting rod 4 and the small spindle connecting rod 8 to rotate, and drives the 2.2KW small spindle 16 to rotate. The milling cutter or drill bit installed on the 2.2KW small spindle 16 is used to process the workpiece 22 to make the internal cavity cross groove 3, the inclined groove 1 and the hole.

[0029] This invention integrates the main spindle connecting rod 4, the small spindle connecting rod 8, and the small spindle 16 into a single device, which also features length adjustment. A single clamping operation can continuously process multiple features of the workpiece 22, including the bottom cross groove 3, multiple side inclined grooves 1, and groove bottom holes, thus completely eliminating the need for repeated disassembly, reassembly, and tool resetting between processes. It integrates complex multi-process machining into a coherent flow, resulting in a significant improvement in processing efficiency. This invention solves the problems of traditional machining methods that require multiple specialized devices and frequent angle head changes, leading to cumbersome and time-consuming processes. Its simple structure, reliable connection, and versatile operation contribute to improved processing efficiency and reduced processing costs.

[0030] A machining method for a workpiece internal cavity groove and hole machining device utilizing an inertial platform frame includes the following steps: Step 1: Install the processing equipment, such as Figure 8 , Figure 9 As shown: Install the guide rod 5 of the spindle connecting rod 4 into the spindle connecting rod insertion hole 15. Screw six M16 bolts into the six locking grooves 14 and the M16 threaded through holes 6 on the guide rod 5. Move the M16 bolts in the locking grooves 14 to adjust the position of the guide rod 5 in the spindle connecting rod insertion hole 15. Adjust the length of the processing device according to the inner cavity width of the workpiece 22. The inner cavity width of the workpiece 22 is 300mm, and the length of the processing device is adjusted to 320mm to ensure that the small spindle 16 and the processing tool extending into the inner cavity of the workpiece 22 can accurately process the workpiece 22. If the length is insufficient, interference and collision will occur during processing. If the length is too long, it will reduce the processing rigidity and affect the processing efficiency. After adjustment, lock and fix it with M16 bolts. Screw the eight M8 bolts into the eight M8 threaded holes 11 and the threaded holes 11 of the 2.2KW small spindle 16 respectively, and install the 2.2KW small spindle 16 on the small spindle mounting end face 10; Step 2: Debug the processing equipment, such as... Figure 10 , Figure 11 As shown: After the machining device is installed, the BT60 tool holder 7 of the spindle connecting rod 4 is connected to the machine tool spindle 17; Adjusting the perpendicularity of the 2.2KW miniature spindle 16 using the orientation function of the machine tool spindle 17: Adjusting the diameter of... The 8mm and 100mm long mandrel 18 is installed on the 2.2KW small spindle 16. The rotation angle of the machine tool spindle 17 is adjusted and the mandrel 18 is adjusted to a vertical state using the machine tool Z-axis lifting function and dial indicator 19. The mandrel 18 is straightened and then removed to install the machining tool. Step 3: Install workpiece 22, such as Figure 12 As shown: The workpiece 22 is mounted onto the machine tool table 20 via the pressure plate 21, with the bottom of the inner cavity of the workpiece 22 located at the upper end of the machine tool table 20; Step 4: Machining workpiece 22: (1) The cross groove 3 at the bottom of the inner cavity of workpiece 22 is completed: Using the machine tool spindle 17, the 2.2KW small spindle 16 is rotated to a position perpendicular to the bottom of the inner cavity of the workpiece 22. An 8mm milling cutter is used to machine the cross groove at the bottom of the inner cavity of workpiece 22, resulting in a finished product. Figure 13 As shown; (2) Machining two 45° inclined grooves 1 on the bottom side of the inner cavity of workpiece 22 and two groove bottoms. 8 holes, 2 successful: Using the machine tool spindle 17, the 2.2KW small spindle 16 is rotated to a position perpendicular to the two 45° inclined planes on the bottom side of the workpiece 22. Then, using... 8mm end mill and An 8mm drill bit can machine a workpiece with a yield of 22%.Figure 14 As shown; (3) Machining two 45° inclined grooves 1 on the top side of the inner cavity of workpiece 22 and two groove bottoms. 8 holes, 2 successful: Using the machine tool spindle 17, the 2.2KW small spindle 16 is rotated to a position perpendicular to the two 45° inclined planes on the top side of the workpiece 22. Then, using... 8mm end mill and An 8mm drill bit can machine a workpiece with a yield of 22%. Figure 15 As shown; The cross groove 3, inclined groove 1 and hole 2 in the inner cavity of workpiece 22 are completed.

[0031] Using the machining device for the inner cavity grooves and holes of the workpiece within the inertial platform frame, the cross groove 3 at the bottom of the inner cavity of workpiece 22 is machined in one pass; two 45° inclined grooves 1 on the side of the bottom of the inner cavity of workpiece 22 and two grooves at the bottom of each groove are also machined. 8 holes completed; two 45° inclined grooves on the top and side of the inner cavity of workpiece 22 and two grooves at the bottom of each groove. It survived with 8 holes.

[0032] This invention utilizes a machining method for machining grooves and holes in the internal cavity of a workpiece using an inertial platform frame. The steps are clear, precise, and repeatable, reducing over-reliance on operator experience and improving process standardization and repeatability. All machining can be completed in a single alignment step, ensuring the relative positional accuracy between machining features and resulting in stable and reliable product quality. The machined workpiece 22 meets the requirements of the workpiece drawing and increases the machining dimensions of the CNC machine tool, significantly improving the machining accuracy and efficiency of workpiece 22.

[0033] Although embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A processing device for internal cavity grooves and holes of an inertial platform frame workpiece, characterized in that: The machine tool includes a main spindle connecting rod (4), a small spindle connecting rod (8), and a small spindle (16). The small spindle (16) is mounted on the small spindle connecting rod (8), the small spindle connecting rod (8) is mounted on the main spindle connecting rod (4), and the main spindle connecting rod (4) is mounted on the machine tool spindle (17). The machine tool spindle (17) drives the main spindle connecting rod (4) and the small spindle connecting rod (8) to rotate, and drives the small spindle (16) to rotate. The machining tool mounted on the small spindle (16) processes the workpiece (22).

2. The processing device for the inner cavity groove and hole of the inertial platform frame workpiece according to claim 1, characterized in that: The spindle connecting rod (4) includes a guide rod (5) at the front end and a tool holder (7) at the rear end. The guide rod (5) is mounted on the small spindle connecting rod (8), and the tool holder (7) is used to mount the machine tool spindle (17). The diameter of the guide rod (5) is... The light rod (5) has a diameter of 70±0.02mm and a length of 520mm. Several threaded through holes (6) are arranged in a radial direction. The light rod (5) is installed on the small spindle connecting rod (8) through the several threaded through holes (6).

3. The machining apparatus for the inner cavity groove and hole of the inertial platform frame workpiece according to claim 1, characterized in that: The small spindle connecting rod (8) includes a small spindle mounting block (9) at the front end and a cylinder (12) at the rear end. The small spindle mounting block (9) is used to install the small spindle (16), and the cylinder (12) is used to install the spindle connecting rod (4).

4. The processing device for the inner cavity groove and hole of the inertial platform frame workpiece according to claim 3, characterized in that: The small spindle mounting block (9) has a small spindle mounting end face (10) at one end away from the cylinder (12). Several threaded holes (11) are symmetrically arranged on the small spindle mounting end face (10). The threaded holes (11) are 20mm deep. The small spindle (16) is mounted on the small spindle mounting end face (10) through the several threaded holes (11). The flatness of the small spindle mounting end face (10) is less than 0.002mm.

5. The processing device for the inner cavity groove and hole of the inertial platform frame workpiece according to claim 3, characterized in that: The cylinder (12) has a spindle connecting rod insertion hole (15) at its center. The outer circumference of the cylinder (12) has symmetrical cutting surfaces (13). Several locking grooves (14) are symmetrically arranged on the cutting surfaces (13) along the radial direction of the cylinder (12). The spindle connecting rod (4) is movably installed in the spindle connecting rod insertion hole (15). The position of the spindle connecting rod (4) in the spindle connecting rod insertion hole (15) is adjusted by the several locking grooves (14), and it is locked and fixed by bolts.

6. A machining method using the machining apparatus for the inner cavity groove and hole of an inertial platform frame workpiece according to any one of claims 1 to 5, characterized in that: Includes the following steps: Step 1: Install the processing equipment. Install the smooth rod (5) of the spindle connecting rod (4) into the spindle connecting rod insertion hole (15), screw the bolts into the locking groove (14) and the threaded through hole (6) on the smooth rod (5) respectively, move the bolts in the locking groove (14), adjust the position of the smooth rod (5) in the spindle connecting rod insertion hole (15), and after the adjustment is completed, lock and fix it with bolts; Screw the bolts into the threaded holes (11) and the threaded holes (11) of the small spindle (16) respectively, and install the small spindle (16) on the mounting end face (10) of the small spindle; Step 2: Debug the processing equipment: After the machining device is installed, the tool holder (7) of the spindle connecting rod (4) is connected to the machine tool spindle (17). Adjust the perpendicularity of the small spindle (16) using the orientation function of the machine tool spindle (17): Adjust the diameter of the small spindle (16) to be... Install the 8mm, 100mm long mandrel (18) onto the small spindle (16), adjust the rotation angle of the machine tool spindle (17) and use the machine tool Z-axis lifting function and dial indicator (19) to adjust the mandrel (18) to a vertical state, straighten the mandrel (18), and after straightening the mandrel (18), remove the mandrel (18) and install the machining tool. Step 3, Install the workpiece (22): The workpiece (22) is mounted on the machine tool table (20) by the pressure plate (21), and the bottom of the inner cavity of the workpiece (22) is located at the upper end of the machine tool table (20); Step 4, process the workpiece (22): (1) Machining the workpiece (22) Cross groove at the bottom of the inner cavity (3) Finishing: Using the machine tool spindle (17), rotate the small spindle (16) to a position perpendicular to the bottom of the inner cavity of the workpiece (22), and then use... The workpiece is machined with an 8mm milling cutter to create a cross groove at the bottom of the inner cavity (3) of the workpiece (22). (2) Machining workpiece (22) Two 45° inclined grooves (1) on the bottom side of the inner cavity and two groove bottoms. 8 holes (2) survived: Using the machine tool spindle (17), rotate the 2.2KW small spindle (16) to a position perpendicular to the two 45° inclined planes on the bottom side of the workpiece (22), and then use the machine tool spindle (17) to rotate the small spindle (16) to a position perpendicular to the two 45° inclined planes on the bottom side of the workpiece (22). 8mm end mill and Workpiece (22) was successfully machined using an 8mm drill bit; (3) Machining workpiece (22) Two 45° inclined grooves (1) on the top side of the inner cavity and two groove bottoms. 8 holes (2) survived: Using the machine tool spindle (17), rotate the 2.2KW small spindle (16) to a position perpendicular to the two 45° inclined planes on the top side of the workpiece (22), and then use the machine tool spindle (17) to rotate the small spindle (16) to a position perpendicular to the two 45° inclined planes on the top side of the workpiece (22). 8mm end mill and Workpiece (22) was successfully machined using an 8mm drill bit; The cross groove (3), inclined groove (1) and hole (2) of the inner cavity of the workpiece (22) are completed.

Images