Efficient turning-grinding combined machining device and machining method for complex component of hard and brittle material

Abstract

This invention belongs to the field of precision manufacturing CNC machining technology, and relates to a high-efficiency turning and grinding composite machining device and method for complex components made of hard and brittle materials. The machining device includes a dial, a clamping sleeve, a stator core mandrel fixture, a positioning fixture, and a clamping positioning block. The method involves mounting the stator core onto the stator core mandrel fixture, quickly aligning it using the positioning fixture, and then clamping it on a CNC lathe in a single setup to grind the four-pole radial end face, the chamfer at the junction of the four-pole radial end face and the outer circle, and the four-pole radial outer circle. This invention solves the problems of low efficiency, easy edge chipping, and the need for multiple clamping and alignment in traditional sequential machining, achieving high-efficiency, high-precision, and automated machining of complex components made of hard and brittle materials. It is particularly suitable for the mass production of parts such as manganese-zinc ferrite stator cores.

Description

Technical Field

[0001] This invention relates to the field of precision manufacturing CNC machining technology, specifically to a high-efficiency turning and grinding composite machining device and machining method for complex components made of hard and brittle materials. Background Technology

[0002] In the field of inertial navigation, the gyroscope sensor is one of the main components of a liquid-floated gyroscope. To meet usage requirements, its core components, such as the magnetic core and magnetic ring, are made of manganese-zinc ferrite. This type of material has good electrical properties, but it is a typical hard and brittle material, and can only be processed by grinding. As a key component in the gyroscope sensor, the stator core 1 is made of manganese-zinc ferrite. Furthermore, the stator core 1 also has a complex structure, such as... Figure 1 The diagram shows a three-dimensional structural schematic of stator core 1. This stator core 1 is not only structurally complex, but also requires high dimensional and positional precision between its components. For example, the coaxiality between its central inner hole 3 and the outer radial circle 5 of the four poles, the dimensional accuracy in the radial direction of the four poles, and the symmetry between the radial center of the four poles and the axial direction of the central inner hole 3 are all required to be no greater than 0.02. The previous machining process for this stator core 1 was as follows: first, the central end face 2 was machined using a surface grinding method to ensure the parallelism of the two end faces; then, using the end face as positioning, the central inner hole 3 was machined using an internal grinding method to ensure the perpendicularity of the inner hole and the end face; subsequently, using the end face and the inner hole as positioning, the radial dimensions of the four poles were machined using a surface grinding method; finally, using the inner hole as positioning, the outer radial circle 5 of the four poles was machined using an external grinding method. Actual machining has confirmed that the above machining scheme can guarantee the machining accuracy of the stator core 1 and meet the usage requirements, but it also has the following drawbacks: (1) When the radial end face 4 of the quadrupole is machined by the flat grinding method, the stator core 1 can only be manually rotated, which has a certain impact on the machining efficiency. (2) Since the junction of the quadrature radial end face 4 and the quadrature radial outer circle 5 is a sharp corner, in order to prevent edge chipping, only a small process parameter can be used when machining the quadrature radial outer circle 5, which will also have a certain impact on the machining efficiency. At the same time, the sharp corner chipping problem cannot be completely avoided during the machining process. (3) The machining datum for the four-pole radial end face 4 and the four-pole radial outer circle 5 is the inner hole 3 of the center circle, but it requires two clamping operations, which increases the clamping and alignment time and will also affect the improvement of machining efficiency.

[0003] To address the above technical problems, this invention proposes a high-efficiency turning and grinding composite processing device and method for complex components made of hard and brittle materials. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a high-efficiency turning-milling composite machining device and method for complex components made of hard and brittle materials. By mounting the stator core on a stator core mandrel tooling, and quickly aligning it using a positioning tooling, the device is clamped on a CNC lathe in one operation. The four-pole radial end face, the chamfer at the junction of the four-pole radial end face and the outer circle, and the four-pole radial outer circle are ground separately. This solves the problems of low efficiency, easy edge chipping, and the need for multiple clamping and alignment in traditional sequential machining. It achieves high-efficiency, high-precision, and automated machining of complex components made of hard and brittle materials, and is particularly suitable for the mass production of parts such as manganese-zinc ferrite stator cores. The original scheme of machining the four-pole radial end face and the four-pole radial outer circle of the stator core made of hard and brittle materials by surface grinding and external grinding respectively is optimized into a scheme of completing the machining in one operation by turning-milling composite machining. At the same time, the chamfering at the junction of the four-pole radial end face and the four-pole radial outer circle is added to avoid sharp corner chipping. The tool setting is done in one clamping and alignment, improving machining efficiency and product quality.

[0005] The technical problem solved by this invention is achieved through the following technical solution: A high-efficiency turning and grinding composite machining device for complex components made of hard and brittle materials includes a dial, a clamping sleeve, a stator core mandrel fixture, and a positioning fixture. The dial is connected to the clamping sleeve via a pin. The stator core mandrel fixture is mounted on the clamping sleeve. Several stator cores are mounted on the stator core mandrel fixture. The stator core mandrel fixture with several stator cores is fitted with the clamping sleeve and mounted on the positioning fixture. The positioning fixture is used to align the several stator cores. The several stator cores are then ground on a lathe using four-pole radial end faces and four-pole radial outward grinding.

[0006] Furthermore, it also includes a clamping positioning block, which has a square structure. The front end of the clamping positioning block is provided with a clamping screw mounting hole, and the rear end of the clamping positioning block is provided with a clamping arc. The clamping arc matches the stator core spindle tooling. The upper and lower ends of the clamping positioning block are provided with mounting positioning surfaces. The stator core spindle tooling is clamped and mounted on the clamping sleeve by the clamping positioning block.

[0007] Furthermore, the dial includes a U-shaped pin mounting groove and a semi-circular mounting plate, which are integrally formed. Ball head screw mounting holes are symmetrically provided at the left and right ends of the U-shaped pin mounting groove, and the U-shaped pin mounting groove matches the pin. A center clearance hole is provided in the center of the semi-circular mounting plate, and fastening screw mounting holes are symmetrically provided at the left and right ends of the center clearance hole. The dial is connected to the lathe spindle through the fastening screw mounting holes and to the collet through the pin mounted on the U-shaped pin mounting groove.

[0008] Furthermore, the sleeve includes a boss and a mounting plate, which are integrally formed. The boss has a pin mounting hole at its center and pin clamping screw mounting holes at its left and right ends. The mounting plate has a mandrel tooling mounting hole at its center and clamping positioning block mounting grooves at its left and right ends. The mounting plate also has clamping screw mounting holes at its left and right ends. The mandrel tooling mounting hole, clamping positioning block mounting grooves, and clamping screw mounting holes are located on the same center line.

[0009] Furthermore, the stator core mandrel fixture is cylindrical, and from left to right it includes a clamping fastening section, a stator core positioning section, a stator core mounting section, and a stator core fixing section. The clamping fastening section, stator core positioning section, stator core mounting section, and stator core fixing section are coaxial and trapezoidal in shape. The right end of the stator core positioning section is provided with a stator core positioning end face, the right end of the stator core mounting section is provided with a stator core fixing end face, and the left and right ends of the stator core mandrel fixture are provided with center holes.

[0010] Furthermore, the positioning fixture includes a stator core U-shaped positioning stage and a jacket U-shaped positioning stage, which are integrally formed. The stator core U-shaped positioning stage and the jacket U-shaped positioning stage are L-shaped. The upper end of the stator core U-shaped positioning stage is symmetrically provided with a stator core positioning surface, and the upper end of the jacket U-shaped positioning stage is symmetrically provided with a jacket positioning surface.

[0011] Furthermore, the pin is a rectangular structure with positioning outer circles at its upper and lower ends, which match the clip and the dial. It also has fastening mounting surfaces at its front and rear ends, which match the dial.

[0012] A processing method using a high-efficiency turning and grinding composite machining device for complex components made of hard and brittle materials, characterized by comprising the following steps: Step 1: Securely connect the stator core mandrel tooling to the clamping sleeve to form assembly structure one: Install the clamping positioning block in the clamping positioning block mounting slot of the sleeve, install the clamping fastening section of the stator core spindle tooling in the spindle tooling mounting hole of the mounting plate of the sleeve, and fasten the clamping positioning block on the clamping fastening section of the stator core spindle tooling with clamping screws. Step 2: Based on assembly structure one, fasten the pin to the sleeve to form assembly structure two. Install one end of the pin in the pin mounting hole of the boss of the sleeve, and use a clamping screw to fasten the pin to the sleeve. Step 3: Connect the dial to the lathe spindle to form assembly structure three. The dial is connected to the lathe spindle using fastening screws. The lathe spindle front center passes through the center clearance hole. The lathe spindle front center and lathe spindle tail center are used to hold the stator core mandrel tooling. Step 4: Combine assembly structure two with assembly structure three to form assembly structure four, and align the stator core mandrel tooling: Install the other end of the pin in the U-shaped pin mounting groove of the dial, and use ball head screws to fasten the pin to the dial. Fasten the dial to the collet through the pin. The lathe spindle front center presses against the left end center hole of the stator core mandrel tooling, and the lathe spindle tail center presses against the right end center hole of the stator core mandrel tooling. The position of the stator core mandrel tooling is adjusted by turning the screws on the tailstock of the lathe spindle. After the alignment is completed, the tailstock of the lathe spindle is tightened. Step 5: After aligning the stator core mandrel tooling, disassemble assembly structure one, install the stator core, and assemble assembly structure five. Loosen the clamping screws on the boss of the collet and the screws on the tailstock of the lathe spindle. Remove assembly structure one. Install several stator cores one by one on the stator core mounting section. Install several nuts on the stator core fixing section. The stator cores are positioned by the stator core positioning end face and tightened by the nuts. The nuts are positioned by the stator core fixing end face. Step 6: Install assembly structure five onto the positioning fixture to form assembly structure six, and align the stator core: The four-pole radial end face of the stator core is aligned using a positioning fixture. The boss of the sleeve is installed downward on the U-shaped positioning platform of the sleeve. The end faces of the sleeve at the left and right ends of the boss are in contact with the positioning surface of the sleeve. Several stator cores are installed on the U-shaped positioning platform of the stator core, and the four-pole radial end face of the stator core is in contact with the positioning surface of the stator core. Step 7: After the stator core is aligned, install assembly structure five onto assembly structure three to form assembly structure seven. Install one end of the pin in the pin mounting hole of the boss of the collet, and fasten the pin to the collet with a clamping screw. Install the other end of the pin in the U-shaped pin mounting groove of the dial, and fasten the pin to the dial with a ball head screw. The front center of the lathe spindle presses against the left center hole of the stator core mandrel tooling, and the tail center of the lathe spindle presses against the right center hole of the stator core mandrel tooling. Step 8: Use an end face machining wheel to machine the four-pole radial end face of the stator core, use a chamfering machining wheel to machine the chamfer at the junction of the four-pole radial end face and the four-pole radial outer circle of the stator core, and use an outer circle machining wheel to machine the four-pole radial outer circle of the stator core. Step 9: Disassemble assembly structure five, remove the stator core, and the machining is complete. Loosen the clamping screws on the boss of the jacket and the screws on the tailstock of the lathe spindle, remove assembly structure five, and remove the stator cores one by one to complete the machining. Step 10: Repeat steps 5 to 9 to process the next batch of stator cores.

[0013] The advantages and positive effects of this invention are: 1. This invention significantly improves processing efficiency: By using a stator core mandrel fixture that clamps several stator cores at once, and utilizing the Y-axis and indexing function of a CNC lathe, the original two independent processes of surface grinding and external grinding (including two clamping operations) are integrated into continuous processing in a single clamping operation. There is no need to manually flip the stator cores, reducing the auxiliary time for loading, unloading, alignment, and tool setting, improving processing accuracy and product quality, and achieving efficient mass production.

[0014] 2. The processing quality and stability of this invention are greatly improved: The innovative addition of a chamfering process at the junction of the radial end face and the radial outer circle of the four poles fundamentally eliminates the edge chipping defects caused by stress concentration at sharp corners. The process is completed in one clamping, ensuring higher consistency in the form and position tolerances (such as coaxiality and symmetry) between the central circle inner hole of the stator core, the radial end face of the four poles, and the radial outer circle of the four poles, and reducing the cumulative error caused by datum conversion.

[0015] 3. The process parameters of this invention are optimized, further improving efficiency: Since the chamfering process eliminates the risk of edge chipping in advance, a larger grinding depth and feed rate can be used in the subsequent four-pole radial outer cylindrical grinding, thereby breaking through the limitation of traditional processes that must use conservative parameters due to concerns about edge chipping. The processing time is further shortened and the processing efficiency is improved without affecting the quality.

[0016] 4. The processing device of this invention is ingeniously designed, easy to operate, and highly versatile and expandable: the connection of each component is reliable and easy to assemble and disassemble. The design principle of the mandrel tooling can adapt to the clamping of workpieces of different sizes, providing an effective process equipment solution for the processing of complex components of similar hard and brittle materials.

[0017] 5. The present invention provides an efficient turning-grinding composite machining method for complex components made of hard and brittle materials. It optimizes the original scheme in which the four-pole radial end face and the four-pole radial outer circle of the stator magnetic core of complex components made of hard and brittle materials are machined by surface grinding and external grinding respectively, into a scheme in which the turning-milling composite machining is completed in one step. At the same time, it adds chamfering at the junction of the four-pole radial end face and the four-pole radial outer circle to avoid sharp corner chipping. It reduces the original two clamping, alignment and tool setting to one, thereby improving machining efficiency and product quality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the stator core; Figure 2 This is a schematic diagram of the jacket structure of the efficient turning and grinding composite processing device for complex components made of hard and brittle materials according to the present invention. Figure 3 This is a three-dimensional structural diagram of the dial of the efficient turning and grinding composite processing device for complex components made of hard and brittle materials according to the present invention. Figure 4 This is a three-dimensional structural diagram of the pin shaft of the high-efficiency turning and grinding composite processing device for complex components made of hard and brittle materials according to the present invention. Figure 5 This is a three-dimensional structural diagram of the clamping and positioning block of the high-efficiency turning and grinding composite processing device for complex components made of hard and brittle materials according to the present invention. Figure 6 This is a three-dimensional structural diagram of the stator core mandrel tooling of the high-efficiency turning and grinding composite processing device for complex components made of hard and brittle materials according to the present invention. Figure 7 This is a three-dimensional structural diagram of the positioning tooling for the high-efficiency turning and grinding composite processing device for complex components made of hard and brittle materials according to the present invention. Figure 8 This is a schematic diagram of the assembly structure of the high-efficiency turning and grinding composite processing device for complex components made of hard and brittle materials according to the present invention. Figure 9 This is a schematic diagram of the second assembly structure of the high-efficiency turning and grinding composite processing device for complex components made of hard and brittle materials according to the present invention; Figure 10 This is a schematic diagram of the assembly structure three of the high-efficiency turning and grinding composite processing device for complex components made of hard and brittle materials according to the present invention; Figure 11 This is a schematic diagram of the assembly structure four of the high-efficiency turning and grinding composite processing device for complex components made of hard and brittle materials according to the present invention; Figure 12 This is a schematic diagram of assembly structure five of the high-efficiency turning and grinding composite processing device for complex components made of hard and brittle materials according to the present invention; Figure 13 This is a schematic diagram of assembly structure six of the high-efficiency turning and grinding composite processing device for complex components made of hard and brittle materials according to the present invention; Figure 14 This is a schematic diagram of the assembly structure seven of the high-efficiency turning and grinding composite processing device for complex components made of hard and brittle materials according to the present invention; Figure 15 This is a schematic diagram of the high-efficiency turning and grinding composite machining device for complex components made of hard and brittle materials of the present invention machining the four-pole radial end face of the stator core. Figure 16 This is a schematic diagram illustrating the chamfering process at the junction of the quadrupole radial end face and the quadrupole radial outer circle of a stator core using the efficient turning and grinding composite machining device for complex components made of hard and brittle materials according to the present invention. Figure 17 This is a schematic diagram of the high-efficiency turning and grinding composite machining device for complex components made of hard and brittle materials of the present invention machining the four-pole radial outer circle of the stator core. In the picture: 1-Stator core, 2-Central circular end face, 3-Central circular inner hole, 4-Four-pole radial end face, 5-Four-pole radial outer circle, 6-Cladle, 7-Boss, 8-Pin mounting hole, 9-Pin clamping screw mounting hole, 10-Mounting plate, 11-Mandrel tooling mounting hole, 12-Clamping positioning block mounting groove, 13-Clamping screw mounting hole one, 14-Dial plate, 15-U-shaped pin mounting groove, 16-Ball head screw mounting hole, 17-Semi-circular mounting plate, 18-Center clearance hole, 19-Fastening screw mounting hole, 20-Pin, 21-Positioning outer circle, 22-Fastening mounting surface, 23-Clamping positioning block, 24-Mounting positioning surface, 25-Clamping screw 26-Pressing arc, 27-Stator core spindle tooling, 28-Clamping fastening section, 29-Stator core positioning section, 30-Stator core mounting section, 31-Stator core fixing section, 32-Stator core positioning end face, 33-Stator core fixing end face, 34-Center hole, 35-Positioning tooling, 36-Stator core U-shaped positioning table, 37-Stator core positioning surface, 38-Clamping U-shaped positioning table, 39-Clamping positioning surface, 40-Mounting end face, 41-Lathe spindle front center, 42-Lathe spindle tail center, 43-Nut, 44-End face machining grinding wheel, 45-Chamfering machining grinding wheel, 46-External diameter machining grinding wheel. Detailed Implementation

[0019] 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.

[0020] A high-efficiency turning and grinding composite machining device for complex components made of hard and brittle materials includes a dial 14, a clamping sleeve 6, a stator core spindle fixture 27, and a positioning fixture 35. The dial 14 is connected to the clamping sleeve 6 via a pin 20. The stator core spindle fixture 27 is mounted on the clamping sleeve 6. Several stator cores 1 are mounted on the stator core spindle fixture 27. The stator core spindle fixture 27, which mounts several stator cores 1, cooperates with the clamping sleeve 6 and is mounted on the positioning fixture 35. The positioning fixture 35 is used to align several stator cores 1. The lathe is used to grind the four-pole radial end face 4 and the four-pole radial external surface of several stator cores 1.

[0021] like Figure 5 As shown, it also includes a clamping positioning block 23, which has a square structure. The front end of the clamping positioning block 23 is provided with a clamping screw mounting hole 25, and the rear end of the clamping positioning block 23 is provided with a clamping arc 26. The clamping arc 26 matches the stator core spindle tooling 27. The upper and lower ends of the clamping positioning block 23 are provided with mounting positioning surfaces 24. The stator core spindle tooling 27 is clamped and installed on the clamping sleeve 6 by the clamping positioning block 23.

[0022] like Figure 3 As shown, the dial 14 includes a U-shaped pin mounting groove 15 and a semi-circular mounting plate 17, which are integrally formed. Ball head screw mounting holes 16 are symmetrically provided at the left and right ends of the U-shaped pin mounting groove 15. The U-shaped pin mounting groove 15 matches the pin 20. A center clearance hole 18 is provided in the center of the semi-circular mounting plate 17 for inserting the top center of the lathe spindle to ensure that the dial 14 is installed on the lathe spindle without interfering with the front center 41 of the lathe spindle. Fastening screw mounting holes 19 are symmetrically provided at the left and right ends of the center clearance hole 18. The fastening screws are screwed into the fastening screw mounting holes 19 to connect the dial 14 to the lathe spindle, ensuring that the dial 14 rotates simultaneously with the lathe spindle. The dial 14 is connected to the collet 6 through the pin 20 installed on the U-shaped pin mounting groove 15.

[0023] like Figure 2 As shown, the sleeve 6 includes a boss 7 and a mounting plate 10, which are integrally formed. The boss 7 has a pin mounting hole 8 at its center for mounting a pin 20. The left and right ends of the boss 7 have pin clamping screw mounting holes 9 for mounting clamping screws. The clamping screws are used to fasten the pin 20 installed in the pin mounting hole 8. The mounting plate 10 has a mandrel tooling mounting hole 11 at its center for mounting a stator core mandrel tooling 27. The left and right ends of the mandrel tooling mounting hole 11 have clamping positioning block mounting grooves 12 for mounting clamping positioning blocks 23. The left and right ends of the mounting plate 10 have clamping screw mounting holes 11-13 for mounting clamping screws. The mandrel tooling mounting hole 11, clamping positioning block mounting groove 12, clamping screw mounting hole 13-13, and clamping screw mounting hole 25-25 are located on the same center line. The stator core mandrel fixture 27 is installed in the mandrel fixture mounting hole 11. The clamping arc 26 of the clamping positioning block 23 fits against the stator core mandrel fixture 27. The mounting positioning surface 24 of the clamping positioning block 23 fits against the upper and lower end faces of the clamping positioning block mounting groove 12. The clamping positioning block 23 is fastened to the stator core mandrel fixture 27 by screwing clamping screws into clamping screw mounting holes 13 and 25.

[0024] like Figure 6As shown, the stator core mandrel fixture 27 is cylindrical, comprising, from left to right, a clamping section 28, a stator core positioning section 29, a stator core mounting section 30, and a stator core fixing section 31. These sections are coaxial and trapezoidal. The clamping section 28 is installed within the mandrel fixture mounting hole 11 of the clamp 6. The outer diameter of the clamping section 28 is parallel to the mandrel fixture. The clearance of mounting hole 11 is 0.01-0.02mm. Stator core mounting section 30 is used to mount stator core 1. The outer circle of stator core mounting section 30 fits with the inner hole 3 of the center circle of stator core 1 with a clearance of 0.01-0.02mm. Stator core fixing section 31 is used to mount nut 43. The size of mandrel tooling mounting hole 11 is 0.01-0.02mm larger than the outer circle size of stator core mounting section 30 of stator core mandrel tooling 27. The right end of the stator core positioning section 29 is provided with a stator core positioning end face 32, which fits against the center circle end face 2 of the stator core 1 for positioning the stator core 1. The right end of the stator core mounting section 30 is provided with a stator core fixing end face 33 for positioning the nut 43. The left and right ends of the stator core mandrel tooling 27 are provided with center holes 34 for mounting the lathe spindle front center 41 and the lathe spindle tail center 42. The stator mounting section of the stator core mandrel tooling 27 can be adjusted according to different central circle inner holes 3 of the stator core 1, and is suitable for stator cores 1 with different central circle inner hole 3 sizes.

[0025] like Figure 7 As shown, the positioning fixture 35 includes a stator core U-shaped positioning platform 36 and a sleeve U-shaped positioning platform 38. The stator core U-shaped positioning platform 36 and the sleeve U-shaped positioning platform 38 are integrally formed and are L-shaped. The upper end of the stator core U-shaped positioning platform 36 is symmetrically provided with a stator core positioning surface 37. The positioning surface of the stator core 1 is in contact with the four-pole radial end face 4 of the stator core 1 for positioning the stator core 1. The upper end of the sleeve U-shaped positioning platform 38 is symmetrically provided with a sleeve positioning surface 39. The sleeve positioning surface 39 is in contact with the end faces of the sleeve 6 located at the left and right ends of the boss 7 for positioning the sleeve 6. This ensures that the four-pole radial end face 4 of the stator core 1 is parallel to the end faces of the sleeve 6 located at the left and right ends of the boss 7, reducing subsequent alignment and saving time.

[0026] like Figure 4 As shown, the pin 20 has a rectangular structure with positioning outer circles 21 at its upper and lower ends and fastening mounting surfaces 22 at its front and rear ends. The pin 20 is used to fasten the sleeve 6 to the dial 14. The positioning outer circles 21 match the pin mounting holes 8 of the sleeve 6. The positioning outer circles 21 and the fastening mounting surfaces 22 match the U-shaped pin mounting grooves 15 of the dial 14.

[0027] Working principle of the invention: Install the clamping positioning block 23 in the clamping positioning block mounting groove 12 of the clamping sleeve 6, install the clamping fastening section 28 of the stator core spindle tooling 27 in the spindle tooling mounting hole 11 of the mounting plate 10 of the clamping sleeve 6, and use clamping screws to screw into the clamping screw mounting hole 13 of the mounting plate 10 of the clamping sleeve 6 and the clamping screw mounting hole 25 of the clamping positioning block 23 to fasten the clamping positioning block 23 on the clamping fastening section 28 of the stator core spindle tooling 27; One end of the pin 20 is installed in the pin mounting hole 8 of the boss 7 of the sleeve 6, and the pin 20 is fastened to the sleeve 6 by screwing the clamping screw into the pin clamping screw mounting hole 9; the other end of the pin 20 is installed in the U-shaped pin mounting groove 15 of the dial 14, and the pin 20 is fastened to the dial 14 by screwing the ball head screw into the ball head screw mounting hole 16. The dial 14 is fastened to the sleeve 6 through the pin 20, and the stator core 1 is installed on the stator core mandrel tooling 27. The dial 14 is connected to the lathe spindle by screwing the fastening screw into the fastening screw mounting hole 19. The front center 41 of the lathe spindle is inserted into the center clearance hole 18. The front center 41 of the lathe spindle abuts against the left end center hole 34 of the stator core mandrel tooling 27. The tail center 42 of the lathe spindle abuts against the right end center hole 34 of the stator core mandrel tooling 27. The tail center 42 of the lathe spindle is adjusted and tightened. Before processing, the stator core 1 is aligned using a positioning fixture 35. After alignment, the four-pole radial end face 4 of the stator core 1 is processed using an end face machining wheel 44, the chamfering machining wheel 45 is used to process the chamfer at the junction of the four-pole radial end face 4 and the four-pole radial outer circle 5 of the stator core 1, and the outer circle machining wheel 46 is used to process the four-pole radial outer circle 5 of the stator core 1.

[0028] A machining method using a high-efficiency turning and grinding composite machining device for complex components made of hard and brittle materials includes the following steps: Step 1: Securely connect the stator core mandrel tooling 27 to the clamping sleeve 6 to form assembly structure one, as shown below. Figure 8 As shown: Install the clamping positioning block 23 in the clamping positioning block mounting groove 12 of the sleeve 6, and install the clamping fastening section 28 of the stator core spindle tooling 27 in the spindle tooling mounting hole 11 of the mounting plate 10 of the sleeve 6. Tighten the clamping positioning block 23 on the clamping fastening section 28 of the stator core spindle tooling 27 by screwing the clamping screw into the clamping screw mounting hole 13 of the mounting plate 10 of the sleeve 6 and the clamping screw mounting hole 25 of the clamping positioning block 23.

[0029] Step 2: Based on assembly structure one, fasten pin 20 to sleeve 6 to form assembly structure two, as shown below. Figure 9 As shown: Install one end of the pin 20 into the pin mounting hole 8 of the boss 7 of the sleeve 6, and tighten the pin 20 and the sleeve 6 by screwing the clamping screw into the pin clamping screw mounting hole 9.

[0030] Step 3: Connect dial 14 to the lathe spindle to form assembly structure three, as shown below. Figure 10 As shown: The dial 14 is connected to the lathe spindle by screwing the fastening screw into the fastening screw mounting hole 19. The lathe spindle front center 41 is inserted into the center clearance hole 18. The lathe spindle front center 41 and the lathe spindle tail center 42 are used to hold the stator core mandrel tool 27.

[0031] Step 4: Combine assembly structure two with assembly structure three to form assembly structure four, as follows. Figure 11 As shown, the stator core mandrel tooling 27 is aligned: The other end of the pin 20 is installed in the U-shaped pin mounting groove 15 of the dial 14. The pin 20 and the dial 14 are fastened by screwing the ball head screw into the ball head screw mounting hole 16. The dial 14 and the collet 6 are fastened by the pin 20. The front center 41 of the lathe spindle presses against the left center hole 34 of the stator core spindle tooling 27, and the tail center 42 of the lathe spindle presses against the right center hole 34 of the stator core spindle tooling 27. Axial dial gauges are used on the top and side of the stator core mandrel fixture 27. The position is adjusted by turning the screws on the lathe spindle tailstock 42 to ensure the axial and radial positional accuracy of the stator core mandrel fixture 27 relative to the lathe spindle front stock 41 and lathe spindle tailstock 42. After alignment, the lathe spindle tailstock 42 is tightened.

[0032] Step 5: After aligning the stator core mandrel tooling 27, disassemble assembly structure one, install stator core 1, and assemble assembly structure five, as shown below. Figure 12 As shown: Loosen the clamping screws on the boss 7 of the sleeve 6 and the screws on the lathe spindle tail center 42, remove assembly structure one, install several stator cores 1 one by one on the stator core mounting section 30 of the stator core spindle tooling 27, install several nuts 43 on the stator core fixing section 31 of the stator core 1 spindle tooling, the several stator cores 1 are positioned by the stator core positioning end face 32 of the stator core positioning section 29 of the stator core spindle tooling 27, and are tightened by the nuts 43; the nuts 43 are positioned by the stator core fixing end face 33 of the stator core mounting section 30.

[0033] Step 6: Install assembly structure five onto positioning fixture 35 to form assembly structure six, as shown below. Figure 13As shown, the stator core 1 is aligned to ensure that the radial end face 4 of the four poles of the stator core 1 is parallel to the end faces of the sleeve 6 located at the left and right ends of the boss 7, thus reducing the need for subsequent alignment and saving time. The four-pole radial end face 4 of the stator core 1 is aligned using the positioning fixture 35. The boss 7 of the sleeve 6 is installed downward on the U-shaped positioning platform 38 of the positioning fixture 35. The end faces of the sleeve 6 located at the left and right ends of the boss 7 are in contact with the positioning surface 39 of the U-shaped positioning platform 38. Several stator cores 1 are installed on the stator core U-shaped positioning platform 36 of the positioning fixture 35. The four-pole radial end face 4 of the stator core 1 is in contact with the stator core positioning surface 37 of the stator core U-shaped positioning platform 36. When positioning the stator core 1, the mounting end face 40 of the positioning fixture 35 should be aligned with the end face of the worktable.

[0034] Step 7: After aligning stator core 1, install assembly structure 5 onto assembly structure 3 to form assembly structure 7, as shown below. Figure 14 As shown: One end of the pin 20 is installed in the pin mounting hole 8 of the boss 7 of the sleeve 6. The pin 20 is fastened to the sleeve 6 by screwing the clamping screw into the pin clamping screw mounting hole 9. The other end of the pin 20 is installed in the U-shaped pin mounting groove 15 of the dial 14. The pin 20 is fastened to the dial 14 by screwing the ball head screw into the ball head screw mounting hole 16. The lathe spindle front center 41 abuts against the left end center hole 34 of the stator core mandrel tooling 27, and the lathe spindle tail center 42 abuts against the right end center hole 34 of the stator core mandrel tooling 27.

[0035] Step 8: Use an end face machining wheel 44 to machine the four-pole radial end face 4 of the stator core 1, use a chamfering machining wheel to machine the chamfer at the junction of the four-pole radial end face 4 and the four-pole radial outer circle 5 of the stator core 1, and use an outer circle machining wheel to machine the four-pole radial outer circle 5 of the stator core 1. like Figure 15 As shown, the four-pole radial end face 4 of the stator core is machined by the end face machining grinding wheel 44. At this time, the lathe spindle indexing accuracy is used to ensure the equal division angle between the four poles. The upper and lower end faces of the stator core 1 are machined by the lathe Y-axis function. Since the lathe uses CNC machining, the manual flipping operation is eliminated, which effectively improves the machining efficiency. like Figure 16 As shown, after machining the radial end face 4 of the four poles, a chamfering grinding wheel is used to machine the chamfer at the junction of the radial end face 4 of the four poles and the radial outer circle 5 of the four poles of the stator core 1. At this time, the indexing accuracy of the lathe spindle is used to ensure the equal division angle of the four poles. The upper and lower end faces of the stator core 1 are machined by using the Y-axis function of the lathe. like Figure 17As shown, after the chamfering is completed, the outer diameter grinding wheel is used to process the four-pole radial outer circle 5 of the stator core 1. Since the chamfer has been processed, the grinding depth is increased at this time to avoid the problem of edge chipping at the chamfer where the four-pole radial end face 4 of the stator core 1 intersects with the four-pole radial outer circle 5.

[0036] Step 9: Disassemble assembly structure five, remove stator core 1, and the machining is complete. Loosen the clamping screws on the boss 7 of the jacket 6 and the screws on the tailstock center 42 of the lathe spindle, remove assembly structure five, and remove the stator cores 1 one by one to complete the machining.

[0037] Step 10: Repeat steps 5 to 9 to process the next batch of stator cores 1.

[0038] This invention solves the problems of low efficiency, easy chipping, and the need for multiple clamping and alignment in traditional sequential machining by mounting the stator core 1 on the stator core mandrel tooling 27, quickly aligning it using the positioning tooling 35, and then clamping it on a CNC lathe in one go. The four-pole radial end face 4, the chamfer at the junction of the four-pole radial end face 4 and the outer circle, and the four-pole radial outer circle 5 are ground separately. This invention achieves efficient, high-precision, and automated machining of complex components made of hard and brittle materials, and is particularly suitable for the mass production of parts such as manganese-zinc ferrite stator cores 1. The original scheme of machining the four-pole radial end face 4 and the four-pole radial outer circle 5 of the stator core 1 made of hard and brittle materials by surface grinding and external grinding respectively is optimized into a scheme of machining by turning and milling in one go. At the same time, the chamfering at the junction of the four-pole radial end face 4 and the four-pole radial outer circle 5 is added to avoid sharp corner chipping. The tool setting is done in one clamping and alignment, which improves machining efficiency and product quality.

[0039] 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 high-efficiency turning and grinding composite machining device for complex components made of hard and brittle materials, characterized in that: The system includes a dial (14), a sleeve (6), a stator core spindle fixture (27), and a positioning fixture (35). The dial (14) is connected to the sleeve (6) via a pin (20). The stator core spindle fixture (27) is mounted on the sleeve (6). Several stator cores (1) are mounted on the stator core spindle fixture (27). The stator core spindle fixture (27) that mounts several stator cores (1) cooperates with the sleeve (6) and is mounted on the positioning fixture (35). The positioning fixture (35) is used to align the several stator cores (1). The stator cores (1) are then ground on a lathe with four-pole radial end face (4) and four-pole radial external grinding.

2. The high-efficiency turning and grinding composite machining device for complex components made of hard and brittle materials according to claim 1, characterized in that: It also includes a clamping positioning block (23), which is a square structure. The front end of the clamping positioning block (23) is provided with a clamping screw mounting hole (25), and the rear end of the clamping positioning block (23) is provided with a clamping arc (26). The clamping arc (26) matches the stator core spindle tooling (27). The upper and lower ends of the clamping positioning block (23) are provided with mounting positioning surfaces (24). The stator core spindle tooling (27) is clamped and installed on the clamping sleeve (6) by the clamping positioning block (23).

3. The high-efficiency turning and grinding composite machining device for complex components made of hard and brittle materials according to claim 1, characterized in that: The dial (14) includes a U-shaped pin mounting groove (15) and a semi-circular mounting plate (17), which are integrally formed. Ball head screw mounting holes (16) are symmetrically provided at the left and right ends of the U-shaped pin mounting groove (15). The U-shaped pin mounting groove (15) matches the pin (20). A center clearance hole (18) is provided in the center of the semi-circular mounting plate (17). Fastening screw mounting holes (19) are symmetrically provided at the left and right ends of the center clearance hole (18). The dial (14) is connected to the lathe spindle through the fastening screw mounting holes (19) and connected to the collet (6) through the pin (20) installed on the U-shaped pin mounting groove (15).

4. The high-efficiency turning and grinding composite machining device for complex components made of hard and brittle materials according to claim 1, characterized in that: The sleeve (6) includes a boss (7) and a mounting plate (10). The boss (7) and the mounting plate (10) are integrally formed. The boss (7) has a pin mounting hole (8) at its center. The boss (7) has pin clamping screw mounting holes (9) at its left and right ends. The mounting plate (10) has a mandrel tooling mounting hole (11) at its center. The mandrel tooling mounting hole (11) has clamping positioning block mounting grooves (12) at its left and right ends. The mounting plate (10) has clamping screw mounting holes (13) at its left and right ends. The mandrel tooling mounting hole (11), clamping positioning block mounting grooves (12), and clamping screw mounting holes (13) are located on the same center line.

5. The high-efficiency turning and grinding composite machining device for complex components made of hard and brittle materials according to claim 1, characterized in that: The stator core mandrel tooling (27) is cylindrical and includes, from left to right, a clamping fastening section (28), a stator core positioning section (29), a stator core mounting section (30), and a stator core fixing section (31). The clamping fastening section (28), the stator core positioning section (29), the stator core mounting section (30), and the stator core fixing section (31) are coaxial and trapezoidal. The right end of the stator core positioning section (29) is provided with a stator core positioning end face (32), the right end of the stator core mounting section (30) is provided with a stator core fixing end face (33), and the left and right ends of the stator core mandrel tooling (27) are provided with center holes (34).

6. The high-efficiency turning and grinding composite machining device for complex components made of hard and brittle materials according to claim 1, characterized in that: The positioning fixture (35) includes a stator core U-shaped positioning stage (36) and a jacket U-shaped positioning stage (38). The stator core U-shaped positioning stage (36) and the jacket U-shaped positioning stage (38) are integrally formed. The stator core U-shaped positioning stage (36) and the jacket U-shaped positioning stage (38) are L-shaped. The upper end of the stator core U-shaped positioning stage (36) is symmetrically provided with a stator core positioning surface (37), and the upper end of the jacket U-shaped positioning stage (38) is symmetrically provided with a jacket positioning surface (39).

7. The high-efficiency turning and grinding composite machining device for complex components made of hard and brittle materials according to claim 1, characterized in that: The pin (20) is a rectangular structure with positioning outer circles (21) at its upper and lower ends. The positioning outer circles (21) match the sleeve (6) and the dial (14). The pins (20) have fastening mounting surfaces (22) at their front and rear ends. The fastening mounting surfaces (22) match the dial (14).

8. A processing method using the high-efficiency turning and grinding composite machining apparatus for complex components made of hard and brittle materials as described in any one of claims 1 to 7, characterized in that: Includes the following steps: Step 1: Securely connect the stator core mandrel tooling (27) to the clamp (6) to form assembly structure one: Install the clamping positioning block (23) in the clamping positioning block mounting groove (12) of the sleeve (6), install the clamping fastening section (28) of the stator core spindle tool (27) in the spindle tool mounting hole (11) of the mounting plate (10) of the sleeve (6), and use clamping screws to fasten the clamping positioning block (23) on the clamping fastening section (28) of the stator core spindle tool (27); Step 2: Based on assembly structure one, fasten the pin (20) to the sleeve (6) to form assembly structure two: Install one end of the pin (20) in the pin mounting hole (8) of the boss (7) of the sleeve (6), and use a clamping screw to fasten the pin (20) to the sleeve (6); Step 3: Connect the dial (14) to the lathe spindle to form assembly structure three: The dial (14) is connected to the lathe spindle by fastening screws. The lathe spindle front center (41) is inserted into the center clearance hole (18). The lathe spindle front center (41) and the lathe spindle tail center (42) are used to hold the stator core spindle tooling (27). Step 4: Combine assembly structure two with assembly structure three to form assembly structure four, and align the stator core mandrel tooling (27): Install the other end of the pin (20) in the U-shaped pin mounting groove (15) of the dial (14), and use ball head screws to fasten the pin (20) to the dial (14). Fasten the dial (14) to the sleeve (6) through the pin (20). The lathe spindle front center (41) presses against the left end center hole (34) of the stator core spindle tooling (27), and the lathe spindle tail center (42) presses against the right end center hole (34) of the stator core spindle tooling (27). The position of the stator core spindle tooling (27) is adjusted by turning the screw of the lathe spindle tailstock (42). After the alignment is completed, the lathe spindle tailstock (42) is tightened. Step 5: After aligning the stator core mandrel fixture (27), disassemble assembly structure one and install the stator core (1) to form assembly structure five. Loosen the clamping screws on the boss (7) of the sleeve (6) and the screws on the lathe spindle tail center (42), remove the assembly structure one, install several stator cores (1) one by one on the stator core mounting section (30), install several nuts (43) on the stator core fixing section (31), the several stator cores (1) are positioned by the stator core positioning end face (32) and tightened by the nuts (43); the nuts (43) are positioned by the stator core fixing end face (33); Step 6: Install assembly structure five on the positioning fixture (35) to form assembly structure six, and align the stator core (1): The four-pole radial end face (4) of the stator core (1) is aligned using a positioning fixture (35). The boss (7) of the sleeve (6) is installed downward on the U-shaped positioning table (38) of the sleeve. The end faces of the sleeve (6) located at the left and right ends of the boss (7) are in contact with the positioning surface (39) of the sleeve. Several stator cores (1) are installed on the U-shaped positioning table (36) of the stator core. The four-pole radial end face (4) of the stator core (1) is in contact with the positioning surface (37) of the stator core. Step 7: After the stator core (1) is aligned, install assembly structure five on assembly structure three to form assembly structure seven: Install one end of the pin (20) in the pin mounting hole (8) of the boss (7) of the sleeve (6), and fasten the pin (20) to the sleeve (6) with a clamping screw. Install the other end of the pin (20) in the U-shaped pin mounting groove (15) of the dial (14), and fasten the pin (20) to the dial (14) with a ball head screw. The lathe spindle front center (41) presses against the left end center hole (34) of the stator core spindle tooling (27), and the lathe spindle tail center (42) presses against the right end center hole (34) of the stator core spindle tooling (27). Step 8: Use an end face machining wheel (44) to machine the four-pole radial end face (4) of the stator core (1), use a chamfering machining wheel (45) to machine the chamfer at the junction of the four-pole radial end face (4) and the four-pole radial outer circle (5) of the stator core (1), and use an outer circle machining wheel (46) to machine the four-pole radial outer circle (5) of the stator core (1); Step 9: Disassemble assembly structure five, remove stator core (1), and the machining is complete. Loosen the clamping screws on the boss (7) of the sleeve (6) and the screws on the tailstock center (42) of the lathe spindle, remove the assembly structure five, and remove the stator cores (1) one by one to complete the processing; Step 10: Repeat steps 5 to 9 to process the next batch of stator cores (1).

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