A forming device and method for micro-positioning structure of non-metallic part conical surface sealing

Abstract

The application provides a forming device and method for a micro-limiting structure of a conical surface seal of a non-metal part, wherein a threaded mounting hole is formed in the lower part of a clamp body, a stepped mounting hole is formed in the upper end face of the clamp body, and an operation window is further formed on each of the two wide planes; a first combined nut mechanism and a second combined nut mechanism are oppositely mounted in the threaded mounting hole, and a part mounting positioning arbor and a part posture adjusting arbor are respectively mounted in the threaded mounting hole in an axial positioning manner; a non-metal part to be machined is sleeved on the outer conical structure of the part mounting positioning arbor; a press pin connecting shaft is mounted in the stepped mounting hole, and a press pin is mounted in the counterbore at the bottom end of the press pin connecting shaft; a protractor is sleeved on the guide groove of the press pin connecting shaft through the guide boss on one side of the inner ring of the protractor, and the cutting edge of the press pin is aligned with the zero position of the graduation line of the clamp body by adjusting the indicating line of the protractor to the middle position; and the operation window is used for manual monitoring during the installation, positioning, position adjustment and machining of the non-metal part.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and more particularly to a forming device and method for a micro-limiting structure for a conical seal on a non-metallic part. Background Technology

[0002] In miniature switching valve products, in order to meet the sealing requirements during the switching operation of such products, it is usually necessary to process a small limiting structure on the inner surface of the tiny non-metallic parts in such products. This prevents the parts from rotating circumferentially after product assembly, thereby ensuring the smooth flow of the product's oil passage.

[0003] Currently, the injection molding and milling processes commonly used for machining the inner surfaces of tiny non-metallic parts in micro-switch valve products cannot effectively form the basic structural form of the tiny limiting structure. Furthermore, these processes can cause machining damage to the sealing cone surface of the part substrate during the forming process, and cannot meet the basic geometric parameters and accuracy requirements of such parts. Summary of the Invention

[0004] The purpose of this invention is to provide a forming device and method for a micro-limiting structure for a conical seal on a non-metallic part, so as to solve the forming and processing problem of micro-limiting structures in existing small non-metallic parts, and to solve the problems of processing damage to the sealing conical surface of the part substrate and difficulty in guaranteeing the geometric parameters and accuracy of the sealing conical surface during the forming process.

[0005] The technical solution of the present invention is as follows: The present invention provides a forming device for a micro-limiting structure for a conical surface seal of non-metallic parts, comprising: a clamp body 1, a cylindrical pin 2, a first combined nut mechanism 3, an indexing instrument 4, a pressure pin connecting shaft 7, a second combined nut mechanism 8, a part attitude adjustment mandrel 9, a pressure pin 10, and a part mounting and positioning mandrel 11.

[0006] The fixture body 1 is generally provided with a cuboid structure. A threaded mounting hole is provided through the fixture body 1 along the length direction at the lower part. A stepped mounting hole is provided in the middle of the upper end face of the fixture body 1. The threaded mounting hole and the stepped mounting hole are perpendicular to each other and connected. The upper end face is also formed with indexing lines. An operation window is provided on the two wide planes on the side of the fixture body 1.

[0007] The fixture body 1 is fitted with the first combined nut mechanism 3 and the second combined nut mechanism 8 through its threaded mounting holes at both ends, and is fixedly connected by cylindrical pins 2. The first combined nut mechanism 3 has a part mounting and positioning mandrel 11 sleeved in its central shaft hole, and the second combined nut mechanism 8 has a part orientation adjustment mandrel 9 sleeved in its central shaft hole. The non-metallic part to be processed is sleeved on the outer conical structure at the inner end of the part mounting and positioning mandrel 11, and the part orientation adjustment mandrel 9 is axially positioned and connected to the inner end of the part mounting and positioning mandrel 11, and the angular position of the non-metallic part is adjusted by rotating the part orientation adjustment mandrel 9.

[0008] The stepped mounting hole on the upper end face of the fixture body 1 is used to install the pressure pin connecting shaft 7, and the pressure pin 10 is installed in the countersunk hole at the bottom end of the pressure pin connecting shaft 7, which is used to apply cutting force to the outer wall surface of the non-metallic part to process a micro-limiting structure on the inner conical surface of the non-metallic part.

[0009] The indexing instrument 4 is positioned and fitted in the guide groove on the upper side of the pressure pin connecting shaft 7 by a guide boss set on one side of its inner ring. The bottom end face of the indexing instrument 4 is close to the upper end face of the fixture body 1. By adjusting the indicator line of the indexing instrument 4 to the middle position, the cutting edge of the pressure pin 10 is aligned with the zero position of the indexing scale line of the fixture body 1.

[0010] The operation window on the fixture body 1 is used for the installation, positioning, position adjustment and manual monitoring of non-metallic parts during the processing.

[0011] Optionally, the forming device described above further includes: a tightening nut 5 and a double-ended stud 6;

[0012] The upper end face of the fixture body 1 is symmetrically provided with two stud mounting holes along the center line of the indexing scale. The indexing instrument 4 is symmetrically provided with two waist-shaped slots along the center line of its guide boss. Double-headed studs 6 are installed in the waist-shaped slots of the indexing instrument 4 and the corresponding stud mounting holes on the fixture body 1, and are fixed by tightening the nut 5 on the top of the double-headed studs 6.

[0013] The indexing instrument 4 has a ramp formed on one side of the guide boss, which corresponds to the position of the indexing line on the fixture body 1. The indicator line formed radially on the ramp is located on the center line of the guide boss. A boss handle is also provided at the opposite end of the ramp to adjust the position of the indexing instrument 4 by means of the indicator line and the boss handle.

[0014] Optionally, in the forming apparatus described above, the first combined nut mechanism 3 includes: a first connecting nut 3a and a first fastening nut 3b;

[0015] The first connecting nut 3a has a disc-shaped connecting baffle at its outer end. An external thread is formed on the shaft of the nut near the connecting baffle, which is used to screw it into one end of the threaded connection hole in the fixture body 1. The first connecting nut 3a has a central shaft hole, which is used to insert the through-mounting part mounting positioning mandrel 11, so that the non-metallic part sleeved on the outer conical structure at its inner end is located in the threaded mounting hole, and the fine external thread at its outer end is located outside the connecting baffle. The connecting baffle and the fixture body 1 both have pin holes on their opposite end faces, which are used to fix the first connecting nut 3a and the fixture body 1 with cylindrical pins 2.

[0016] The first fastening nut 3b is screwed onto the fine-pitch external thread of the part mounting and positioning mandrel 11, and is used to lock the axial position of the part mounting and positioning mandrel 11 in the first connecting nut 3a by means of the first fastening nut 3b.

[0017] Optionally, in the forming apparatus described above, the part mounting and positioning mandrel 11 is configured as a four-section integrated structure;

[0018] The outer conical structure at the inner end of the part mounting and positioning mandrel 11 is used to mount the non-metallic part to be processed, simulating the sealing of the conical surface of the part. A symmetrical plane is formed on the outer conical structure, and a connecting and limiting groove is opened on the end face of the outer conical structure for positioning and connecting with the part orientation adjusting mandrel 9. An annular boss is provided between the outer conical structure and the mandrel body to axially limit the part mounting and positioning mandrel 11 and the first connecting nut 3a through the annular boss. The mandrel body is used to connect with the central shaft hole of the first connecting nut 3a, and the end of the mandrel body is set with a fine external thread to realize the threaded connection with the first fastening nut 3b.

[0019] Optionally, in the forming apparatus described above, the second combined nut mechanism 8 includes: a second connecting nut 8a and a second fastening nut 8b;

[0020] The second connecting nut 8a has a disc-shaped connecting baffle at its outer end. An external thread is formed on the shaft of the nut near the connecting baffle, which is used to screw it onto the other end of the threaded connecting hole in the fixture body 1. The second connecting nut 8a has a central shaft hole, which is used to insert the through-mounting part adjustment mandrel 9, so that the connecting limiting boss at its inner end is nested and mated in the connecting limiting groove on the inner end face of the part mounting positioning mandrel 11. The fine external thread at its outer end is located outside the connecting baffle. The connecting baffle and the fixture body 1 both have pin holes on their opposite end faces, which are used to fix the second connecting nut 8a to the fixture body 1 with a cylindrical pin 2.

[0021] The second fastening nut 8b is screwed onto the fine external thread of the mounting part adjustment mandrel 9. The rotation of the second fastening nut 8b drives the mounting part adjustment mandrel 9 and the part mounting positioning mandrel 11 to rotate synchronously, so as to adjust the angular position of the non-metallic part mounted on the part mounting positioning mandrel 11.

[0022] Optionally, in the forming apparatus described above, the configuration is a five-segment integrated structure;

[0023] The inner end face of the part adjustment mandrel 9 is provided with a connecting limiting boss for positioning and connecting with the part mounting and positioning mandrel 11. The connecting limiting boss and the mandrel body have an outer conical surface structure and an annular boss. The outer conical structure reduces the axial force during the connection between the part adjustment mandrel 9 and the part mounting and positioning mandrel 11, and the annular boss limits the axial position of the part adjustment mandrel 9 and the second connecting nut 8a. The mandrel body is used to connect with the central shaft hole of the second connecting nut 8a. The end of the mandrel body is provided with a fine-pitch external thread to achieve a threaded connection with the second fastening nut 8b.

[0024] Optionally, in the forming apparatus described above,

[0025] The pressure pin connecting shaft 7 is configured as a stepped shaft structure, which cooperates with the stepped mounting hole on the fixture body 1. A guide groove is provided on one side of the large diameter shaft at the upper part of the pressure pin connecting shaft 7, and a countersunk hole is provided on the bottom end face of the small diameter shaft for installing the pressure pin 10.

[0026] The pressure pin 10 is configured as a stepped shaft structure. The upper small-diameter shaft is installed in the countersunk hole at the bottom of the pressure pin connecting shaft 7 by interference fit. The lower large-diameter shaft and the bottom working end are provided with a transition connecting surface of a cone structure, and symmetrically arranged flat surfaces are formed on the large-diameter shaft for clamping during the installation of the pressure pin 10. The bottom working end of the pressure pin 10 is formed with a cutting edge with a preset cutting depth, preset cutting width and preset cutting angle.

[0027] Optionally, the forming device described above further includes: a damping spring (12);

[0028] The first mounting ring groove 1a is provided on the stepped end face of the stepped shaft hole of the clamp body 1, and the second mounting ring groove 7a is provided on the stepped end face of the pressure pin connecting shaft 7. A damping spring (12) is installed between the first mounting ring groove 1a and the second mounting ring groove 7a.

[0029] The damping spring (12) is used to provide damping and buffering during the pressing process after an axial force is applied to the pressing pin 10 and the pressing pin connecting shaft 7; it is also used to provide a spring force for resetting the pressing pin 10 and the pressing pin connecting shaft 7 after the pressing is completed and the axial force is removed.

[0030] Secondly, embodiments of the present invention also provide a method for forming a micro-limiting structure for a conical surface seal of a non-metallic part, wherein the forming method uses the forming apparatus for forming a micro-limiting structure for a conical surface seal of a non-metallic part as described in any of the above claims to process the micro-limiting structure on the non-metallic part, the forming method comprising:

[0031] Step 1: Install the non-metallic part to be processed into the forming device of the micro-limiting structure, adjust the angular position of the non-metallic part, and align the cutting edge of the pressure pin 10 with the zero position of the indexing line of the fixture body 1.

[0032] Step 2: Control the servo press spindle to apply axial force to the pressure pin connecting shaft 7 along the axial direction, drive the cutting edge of the pressure pin 10 to cut into the surface of the small non-metallic part along the axial direction, and after confirming the processing status through the operation window of the fixture body 1, maintain the pressure value for a specified time. After completion, withdraw the servo press spindle along the axial direction to the safe starting position, and then confirm the forming processing quality through the operation window of the fixture body 1.

[0033] Optionally, in the forming method described above, step 1 includes:

[0034] Step 11: Install the small non-metallic part on the outer conical structure at the end of the part mounting and positioning mandrel 11, install the part mounting and positioning mandrel 11 with the part installed into the central shaft hole of the first connecting nut mechanism 3a, and then insert the whole into the threaded mounting hole of the fixture body 1, and use the cylindrical pin 2 to fix the first connecting nut mechanism 3a and the fixture body 1.

[0035] Step 12: Install the part orientation adjustment mandrel 9 into the central shaft hole of the second connecting nut mechanism 8a, and then insert it into the fixture body 1 from the other end of the threaded mounting hole, and install it opposite to the first combined nut mechanism 3. Insert the connecting limiting boss at the end of the part orientation adjustment mandrel 9 into the connecting limiting groove of the part mounting positioning mandrel 11, and use cylindrical pins 2 to fix the second connecting nut mechanism 3a and the corresponding cylindrical pin holes of the fixture body 1.

[0036] Step 13: Install the pressure pin 10 into the countersunk hole at the bottom of the pressure pin connecting shaft 7 along the axial direction, and ensure the installation stability and coaxiality of the pressure pin connecting shaft 7 and the pressure pin 10; then install the whole assembly into the stepped mounting hole of the fixture body 1 along the axial direction.

[0037] Step 14: Install the indexing instrument 4 into the guide groove of the pressure pin connecting shaft 7 through the guide boss on one side of the inner ring. Install the two double-ended studs 6 into the two waist-shaped slots of the indexing instrument 4 and the two stud mounting holes on the upper end face of the fixture body 1. Tighten the nuts 5 on the double-ended studs 6 and fit them against the plane of the indexing instrument 4.

[0038] Step 15: Tighten the first fastening nut 3b of the first combined nut mechanism 3, and rotate the second fastening nut 8b of the second combined nut mechanism 8 to adjust the angular position of the micro-limiting structure of the micro non-metallic part to be processed to the specified position.

[0039] Step 16: Rotate the indexing instrument 4 by turning the boss handle of the indexing instrument 4, which will drive the pressure pin connecting shaft 7 equipped with the pressure pin 10 to rotate until the indicator line of the indexing instrument 4 is aligned with the indexing line of the fixture body 1, thereby adjusting the position of the cutting edge of the pressure pin 10 to conform to the angular position relationship of the micro-limiting structure to be processed of the micro non-metallic parts.

[0040] The beneficial effects of this invention are as follows: This invention provides a forming device and method for a micro-limiting structure for a conical seal on a non-metallic part. A first combined nut mechanism 3 and a second combined nut mechanism 8, installed opposite each other in the threaded mounting holes of the fixture body 1, are coaxially fitted with a part mounting and positioning mandrel 11 and a part orientation adjustment mandrel 9, respectively, achieving axial positioning connection. The non-metallic part to be processed is sleeved on the outer conical structure at the inner end of the part mounting and positioning mandrel 11. A pressure pin connecting shaft 7 and a pressure pin 10 for processing the non-metallic part are installed through the stepped mounting holes of the fixture body 1. An indexing instrument 4 is mounted on the outside of the pressure pin connecting shaft 7 via a guide groove, allowing the rotation of the indexing instrument 4 on the end face of the fixture body 1 to adjust the angular position of the cutting edge of the pressure pin 10, thus meeting the processing requirements of the micro-limiting structure for the non-metallic part. Furthermore, the installation, positioning, position adjustment, and processing of the non-metallic part can be manually monitored through an operation window on the fixture body 1. The forming device provided by this invention has the following beneficial effects:

[0041] (1) This forming device can be directly used for forming and processing of non-metallic micro-limiting structures with conical surface seals, and has good functionality and wide applicability;

[0042] (2) The forming device has good processability and can meet the processing requirements of parts with different structural forms. It reduces the influence of the non-metallic part matrix geometry, size and surface quality during the structural forming process. On the basis of ensuring the basic conical surface sealing, it completes the micro-limiting structure forming process on the part. It has good reference significance for the processing of geometric structures of parts with sealing requirements.

[0043] (3) The forming device has a compact structure, is easy to operate, has good design, ingenious innovation and good applicability. It can better adapt to the forming and quality control needs of micro-limited structures with different geometric shapes and angular positional relationships. It can complete the relevant action process through automated or manual operation and meet the visual monitoring and inspection of the entire forming process.

[0044] (4) The forming device provided by the present invention is used to process micro-limiting structures, which improves the current situation where there are no methods or measures in the field of micro-limiting structure processing. It improves the processing accuracy and quality of non-metallic micro-limiting structures with conical surface seals, reduces the impact of micro-limiting structure forming process on the base conical surface seal structure, and better adapts to the needs of system-level products. Attached Figure Description

[0045] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of the present invention and do not constitute a limitation on the technical solutions of the present invention.

[0046] Figure 1 This is a schematic diagram of the overall structure of a forming device for a micro-limiting structure for sealing conical surfaces of non-metallic parts, provided in an embodiment of the present invention.

[0047] Figure 2 for Figure 1 A cross-sectional view of the forming apparatus for a micro-limiting structure for a conical seal of a non-metallic part provided in the embodiment shown;

[0048] Figure 3 A schematic diagram showing the relationship between the non-metallic parts processed by the forming device for the micro-limiting structure provided in this embodiment of the invention and the pressure pins;

[0049] Figure 4 for Figure 1 The illustrated embodiment provides a schematic diagram of the fixture body in the forming apparatus for a micro-limiting structure for sealing conical surfaces of non-metallic parts.

[0050] Figure 5 for Figure 1 A schematic diagram of the pressure pin connecting shaft in the forming device for a micro-limiting structure for sealing conical surfaces of non-metallic parts provided in the embodiment shown;

[0051] Figure 6 for Figure 1 A schematic diagram of the pressure pin in the forming device for a micro-limiting structure for sealing conical surfaces of non-metallic parts provided in the embodiment shown;

[0052] Figure 7 for Figure 1 The illustrated embodiment provides a schematic diagram of the indexing device in the forming apparatus for a micro-limiting structure for sealing conical surfaces of non-metallic parts.

[0053] Figure 8 This is a schematic diagram of the installation structure of the first combined nut mechanism and the part mounting and positioning mandrel in an embodiment of the present invention;

[0054] Figure 9 for Figure 8A schematic diagram of the structure of the first combined nut mechanism in the forming apparatus provided in the embodiment shown;

[0055] Figure 10 for Figure 8 A schematic diagram of the part mounting and positioning mandrel in the forming apparatus provided in the embodiment shown;

[0056] Figure 11 This is a schematic diagram of the installation structure of the second combined nut mechanism and the part mounting and positioning mandrel in an embodiment of the present invention;

[0057] Figure 12 for Figure 11 A schematic diagram of the structure of the first combined nut mechanism in the forming apparatus provided in the embodiment shown;

[0058] Figure 13 for Figure 11 A schematic diagram of the part mounting and positioning mandrel in the forming apparatus provided in the embodiment shown;

[0059] Figure 14 This is a schematic diagram showing the positional relationship between the pressure pin cutting edge and the non-metallic part during the processing of a micro-limiting structure using the forming device provided in this embodiment of the invention. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

[0061] As explained in the background section, there is a need to form micro-limiting structures on the inner surface of tiny non-metallic parts, such as miniature switching valves. However, current injection molding and milling processes can damage the sealing cone surface of the part substrate and fail to meet the basic geometric parameters and precision requirements of such parts.

[0062] To address the aforementioned problems, this invention provides a forming apparatus and method for micro-limiting structures used in conical surface sealing of non-metallic parts. Using the forming apparatus provided by this invention, the relationship between the angular position of the micro-limiting structure of the non-metallic part and the angular position of the cutting force line of action is adjusted to control the safe starting position of the cutting force application, the cutting force speed, and the holding pressure parameters, thereby achieving the machining and forming of the micro-limiting structure in the non-metallic part. This can meet the technical requirements for re-machining the surface of parts requiring conical surface sealing, while ensuring the accuracy requirements of the sealing conical surface of the micro-part and the machining accuracy of the micro-limiting structure, and also ensuring the assembly requirements and sealing performance requirements of such micro-non-metallic parts in system-level products.

[0063] The present invention provides the following specific embodiments, which can be combined with each other. For the same or similar concepts or processes, they may not be described again in some embodiments.

[0064] Based on the material properties, geometric structure, and functional performance requirements of micro non-metallic parts, this invention provides a forming device for a micro-limiting structure for conical surface sealing of non-metallic parts, specifically a force-forming process device based on the deformation of the part material.

[0065] Figure 1 This is a schematic diagram of the overall structure of a forming device for a micro-limiting structure for sealing conical surfaces of non-metallic parts, provided in an embodiment of the present invention. Figure 2 for Figure 1 A cross-sectional view of the forming apparatus for a micro-limiting structure for a conical seal of a non-metallic part provided in the embodiment shown; Figure 3 This is a schematic diagram illustrating the relationship between the non-metallic parts processed by the forming device for the micro-limiting structure provided in this embodiment of the invention and the pressure pins, as shown below. Figure 3 As shown, through the outer wall surface of the non-metallic part.

[0066] Reference Figure 1 and Figure 2 As shown, the forming device for the micro-limiting structure provided in this embodiment of the invention can be applied to the processing of non-metallic parts with forming micro-limiting structures. The forming device consists of: a fixture body 1, a cylindrical pin 2, a first combined nut mechanism 3, an indexing instrument 4, a pressure pin connecting shaft 7, a second combined nut mechanism 8, a part orientation adjusting mandrel 9, a pressure pin 10, and a part mounting and positioning mandrel 11.

[0067] Figure 4 for Figure 1 The illustrated embodiment provides a schematic diagram of the fixture body in a forming apparatus for a micro-limiting structure for sealing conical surfaces of non-metallic parts; as shown. Figure 1 , Figure 2 and Figure 4 In the forming device shown, the fixture body 1 is generally provided with a cuboid structure. A threaded mounting hole is provided through the fixture body 1 along the length direction at the lower part. A stepped mounting hole is provided in the middle of the upper end face of the fixture body 1. The threaded mounting hole and the stepped mounting hole are perpendicular to each other and connected. The upper end face is also formed with indexing lines. An operation window is provided on the two wide planes on the side of the fixture body 1.

[0068] In this embodiment of the invention, the fixture body 1 adopts an ergonomic design scheme and has an operation window with certain angle and position characteristics, which can meet the monitoring of the parts during installation, positioning, adjustment and processing; the indexing lines formed on the upper end face can meet the accurate adjustment of the cutting edge position of the pressure pin 10 during the operation of the invention, and the zero position of the indexing lines in the fixture body 1, the indicator line of the indexing instrument 4, and the position of the cutting edge of the pressure pin 10 correspond.

[0069] Reference Figures 1 to 4 As shown, the fixture body 1 is fitted with the first combined nut mechanism 3 and the second combined nut mechanism 8 through its threaded mounting holes at both ends, and is fixedly connected to the fixture body 1 and the first combined nut mechanism 3 and the second combined nut mechanism 8 by cylindrical pins 2. A part mounting and positioning mandrel 11 is sleeved in the central shaft hole of the first combined nut mechanism 3, and a part orientation adjusting mandrel 9 is sleeved in the central shaft hole of the second combined nut mechanism 8. A non-metallic part to be processed is mounted on the outer conical structure at the inner end of the part mounting and positioning mandrel 11, and the part orientation adjusting mandrel 9 is axially positioned and connected to the inner end of the part mounting and positioning mandrel 11, and the angular position of the non-metallic part is adjusted by rotating the part orientation adjusting mandrel 9.

[0070] In this embodiment of the invention, a first combined nut mechanism 3 and a second combined nut mechanism 8 are installed opposite to each other. The first combined nut mechanism 3 achieves the positioning and axial tensioning of the part mounting and positioning mandrel 11, and avoids deformation and damage to the mechanism caused by excessive axial tension. The second combined nut mechanism 8 achieves the axial positioning and axial tensioning of the part orientation adjustment mandrel 9, and avoids deformation and damage to the mechanism caused by excessive axial tension, ensuring the accuracy and precision of the axial and circumferential orientation adjustment of the mechanism. In addition, the axial positioning connection between the part mounting and positioning mandrel 11 and the part orientation adjustment mandrel 9 enables the adjustment of the angular positional relationship of the part.

[0071] Figure 5 for Figure 1 The schematic diagram shown in the embodiment illustrates the structure of the pressure pin connecting shaft in the forming apparatus for a micro-limiting structure for conical sealing of non-metallic parts. Figure 6 for Figure 1 The illustrated embodiment provides a schematic diagram of the pressure pin structure in the forming apparatus for a micro-limiting structure for sealing conical surfaces of non-metallic parts. (See diagram for reference.) Figures 1 to 6 As shown, the stepped mounting hole on the upper end face of the fixture body 1 is used to install the pressure pin connecting shaft 7, and the pressure pin 10 is installed in the countersunk hole at the bottom end of the pressure pin connecting shaft 7, which is used to apply cutting force to the outer wall surface of the non-metallic part to process a micro-limiting structure on the inner conical surface of the non-metallic part.

[0072] Figure 7 for Figure 1 The illustrated embodiment provides a schematic diagram of the indexing device in a forming apparatus for a micro-limiting structure for sealing conical surfaces of non-metallic parts. In this embodiment, the indexing instrument 4 is positioned and fitted into a guide groove on the upper side of the pressure pin connecting shaft 7 via a guide boss provided on one side of its inner ring. The bottom end face of the indexing instrument 4 is close to the upper end face of the fixture body 1. By adjusting the indicator line of the indexing instrument 4 to the center position, the cutting edge of the pressure pin 10 is aligned with the zero position of the indexing scale line of the fixture body 1.

[0073] Reference Figures 1 to 4 As shown, the operation window opened in the fixture body 1 in this embodiment of the invention is used for the installation, positioning, position adjustment and manual monitoring of non-metallic parts during the processing.

[0074] In one implementation of this invention, see [link to relevant documentation]. Figure 1 and Figure 7 As shown, the forming device also includes: a tightening nut 5 and a double-ended stud 6.

[0075] In this implementation, two stud mounting holes are symmetrically arranged on the upper end face of the fixture body 1 along the center line of the indexing scale. The indexing instrument 4 has two waist-shaped slots symmetrically opened along the center line of its guide boss. Double-headed studs 6 are installed in the waist-shaped slots of the indexing instrument 4 and the corresponding stud mounting holes on the fixture body 1, and are fixed by tightening the nut 5 on the top of the double-headed studs 6.

[0076] like Figure 7 The indexing instrument 4 shown has a ramp formed on one side of its guide boss, which corresponds to the position of the indexing line on the fixture body 1. The indicator line formed radially on the ramp is located on the center line of the guide boss. A boss handle is also provided at the opposite end of the ramp to adjust the position of the indexing instrument 4 by means of the indicator line and the boss handle.

[0077] In this implementation, the indexing instrument 4 is fixed on the upper end face of the fixture body 1 by tightening the nut 5 and the double-ended stud 6. This allows the indexing instrument 4 to rotate at a certain angle through the two oblong holes, which correspond to the upper end face of the fixture body 1, to adjust the angle of the cutting edge of the pressure pin 10. In addition, the indexing instrument 4 in this implementation is equipped with key features such as two symmetrical oblong slots, a boss handle, a guide boss, and an indicator line. The guide boss at the inner ring position enables the indexing instrument 4 to guide the connection shaft 7 of the pressure pin. The oblong slot, boss handle, and indicator line enable precise rotation and indexing positioning after the fixture body 1 is installed, so as to meet the precision forming and processing requirements of small non-metallic parts and their micro-limiting structures.

[0078] In one implementation of this invention, a specific mounting structure is provided for the first combined nut mechanism 3 and the part mounting and positioning spindle 11. Figure 8 This is a schematic diagram of the installation structure of the first combined nut mechanism and the part mounting and positioning mandrel in an embodiment of the present invention. Figure 9 for Figure 8 The schematic diagram of the first combined nut mechanism in the forming apparatus provided in the embodiment shown is as follows. Figure 10 for Figure 8 A schematic diagram of the part mounting and positioning mandrel in the forming apparatus provided in the embodiment shown.

[0079] like Figures 8 to 10As shown, the first combined nut mechanism 3 in this implementation includes: a first connecting nut 3a and a first fastening nut 3b; the outer end of the first connecting nut 3a has a disc-shaped connecting baffle, and an external thread is formed on the shaft of the nut near the connecting baffle for screwing into one end of the threaded connection hole in the fixture body 1; the first connecting nut 3a has a central shaft hole for inserting and mounting the part mounting positioning mandrel 11 through the central shaft hole, so that the non-metallic part sleeved on the outer conical structure at its inner end is located in the threaded mounting hole, and the fine external thread at its outer end is located outside the connecting baffle; pin holes are formed on the opposite end faces of the connecting baffle and the fixture body 1 for fixing the first connecting nut 3a and the fixture body 1 with a cylindrical pin 2. The first fastening nut 3b is screwed onto the fine external thread of the part mounting positioning mandrel 11 for locking the axial position of the part mounting positioning mandrel 11 in the first connecting nut 3a.

[0080] like Figure 10 As shown, the part mounting and positioning mandrel 11 in this implementation is configured as a four-section integrated structure. The outer conical structure at the inner end of the part mounting and positioning mandrel 11 is used to mount the non-metallic part to be processed, simulating a conical seal on the part. A symmetrical plane is formed on the outer conical structure, and a connecting and limiting groove is provided on the end face of the outer conical structure for positioning and connecting with the part orientation adjusting mandrel 9. An annular boss is provided between the outer conical structure and the mandrel body to axially limit the part mounting and positioning mandrel 11 and the first connecting nut 3a. The mandrel body is used to mate with the central shaft hole of the first connecting nut 3a, and the end of the mandrel body is provided with a fine-pitch external thread to achieve a threaded connection with the first fastening nut 3b.

[0081] In one implementation of this invention, a specific mounting structure is provided for the second combined nut mechanism 8 and the part mounting and positioning spindle 11. Figure 11 This is a schematic diagram of the installation structure of the second combined nut mechanism and the part mounting and positioning mandrel in an embodiment of the present invention. Figure 12 for Figure 11 The schematic diagram of the first combined nut mechanism in the forming apparatus provided in the embodiment shown is as follows. Figure 13 for Figure 11 A schematic diagram of the part mounting and positioning mandrel in the forming apparatus provided in the embodiment shown.

[0082] like Figures 11 to 13As shown, the second combined nut mechanism 8 in this implementation includes: a second connecting nut 8a and a second fastening nut 8b; wherein, the outer end of the second connecting nut 8a has a disc-shaped connecting baffle, and an external thread is formed on the shaft of the nut near the connecting baffle, for screwing and mounting to the other end of the threaded connecting hole in the fixture body 1; the second connecting nut 8a has a central shaft hole, for embedding through the central shaft hole into the through-mounting part adjustment mandrel 9, so that the connecting limiting boss at its inner end is nested and mated in the connecting limiting groove on the inner end face of the part mounting positioning mandrel 11, and the fine external thread at its outer end is located outside the connecting baffle; pin holes are formed on the opposite end faces of the connecting baffle and the fixture body 1, for fixing the second connecting nut 8a and the fixture body 1 with a cylindrical pin 2. The second fastening nut 8b is screwed onto the fine-pitch external thread of the mounting part orientation adjustment mandrel 9. The rotation of the second fastening nut 8b drives the mounting part orientation adjustment mandrel 9 and the part mounting positioning mandrel 11 to rotate synchronously, so as to adjust the angular position of the non-metallic part mounted on the part mounting positioning mandrel 11.

[0083] like Figure 13 As shown, the implementation uses a five-segment integrated structure. The inner end face of the part adjustment mandrel 9 is provided with a connecting limiting boss for positioning and connecting with the part mounting and positioning mandrel 11. Between the connecting limiting boss and the mandrel body, there is an outer conical structure and an annular boss. The outer conical structure reduces the axial force during the connection between the part adjustment mandrel 9 and the part mounting and positioning mandrel 11, while the annular boss provides axial positioning between the part adjustment mandrel 9 and the second connecting nut 8a. The mandrel body is used to connect with the central shaft hole of the second connecting nut 8a, and the end of the mandrel body is provided with a fine-pitch external thread to achieve a threaded connection with the second fastening nut 8b.

[0084] In one implementation of this invention, such as Figure 5 and Figure 6 As shown, in this embodiment of the invention, the pressure pin connecting shaft 7 is configured as a stepped shaft structure, which cooperates with the stepped mounting hole on the fixture body 1. A guide groove is provided on one side of the large-diameter shaft of the upper part of the pressure pin connecting shaft 7, and a countersunk hole is provided on the bottom end face of the small-diameter shaft for installing the pressure pin 10. Correspondingly, the pressure pin 10 is configured as a stepped shaft structure as a whole. The upper small-diameter shaft is installed in the countersunk hole at the bottom end of the pressure pin connecting shaft 7 by interference fit. A cone-shaped transition structure is provided between the lower large-diameter shaft and the bottom working end, and symmetrically arranged flat surfaces are formed on the large-diameter shaft for clamping the pressure pin 10 during the installation process. The working end at the bottom of the pressure pin 10 has a cutting edge with a preset cutting depth, preset cutting width, and preset cutting angle.

[0085] It should be noted that the pressure pin connecting shaft 7 is equipped with key features such as a guide groove (which mates with the guide boss of the inner ring of the indexing instrument 4) and a countersunk hole, so as to achieve reliable connection and positioning of the pressure pin 10, precise guiding connection with the indexing instrument 4, and coaxial installation with the fixture body 1, so as to receive and transmit axial force to the pressure pin 10 and complete the circumferential indexing along the axial direction; in addition, the pressure pin 10 is equipped with key features such as a cutting edge, a stepped surface, a transition connecting surface, and a flat surface structure, so as to achieve reliable connection and positioning with the pressure pin connecting shaft 7, and meet the accurate machining of the depth, width, angle and angular position of the micro limit structure.

[0086] Furthermore, based on the above embodiments of the present invention, such as Figure 2 As shown, the forming apparatus provided in this embodiment of the invention further includes a damping spring 12.

[0087] A first mounting ring groove 1a is provided on the stepped end face of the stepped shaft hole of the clamp body 1, and a second mounting ring groove 7a is provided on the stepped end face of the pressure pin connecting shaft 7. A damping spring 12 is installed between the first mounting ring groove 1a and the second mounting ring groove 7a. The damping spring 12 is used to provide damping buffer during the pressing process after applying axial force to the pressure pin 10 and the pressure pin connecting shaft 7. It is also used to provide spring force for reset of the pressure pin 10 and the pressure pin connecting shaft 7 after the pressing is completed and the axial force is removed.

[0088] The forming device for a micro-limiting structure for a conical seal on a non-metallic part provided in this embodiment of the invention uses a first combined nut mechanism 3 and a second combined nut mechanism 8, which are installed opposite each other in the threaded mounting holes of the fixture body 1, to coaxially mount a part mounting and positioning mandrel 11 and a part orientation adjusting mandrel 9, respectively, achieving axial positioning connection. The non-metallic part to be processed is fitted onto the outer conical structure at the inner end of the part mounting and positioning mandrel 11. A pressure pin connecting shaft 7 and a pressure pin 10 for processing the non-metallic part are installed through the stepped mounting holes of the fixture body 1. An indexing instrument 4 is mounted on the outside of the pressure pin connecting shaft 7 via a guide groove, allowing the rotation of the indexing instrument 4 on the end face of the fixture body 1 to adjust the angular position of the cutting edge of the pressure pin 10, thus meeting the processing requirements of the micro-limiting structure for the non-metallic part. Furthermore, the installation, positioning, position adjustment, and processing of the non-metallic part can be manually monitored through an operation window on the fixture body 1. The forming device provided in this embodiment of the invention has the following beneficial effects:

[0089] (1) This forming device can be directly used for forming and processing of non-metallic micro-limiting structures with conical surface seals, and has good functionality and wide applicability;

[0090] (2) The forming device has good processability and can meet the processing requirements of parts with different structural forms. It reduces the influence of the non-metallic part matrix geometry, size and surface quality during the structural forming process. On the basis of ensuring the basic conical surface sealing, it completes the micro-limiting structure forming process on the part. It has good reference significance for the processing of geometric structures of parts with sealing requirements.

[0091] (3) The forming device has a compact structure, is easy to operate, has good design, ingenious innovation and good applicability. It can better adapt to the forming and quality control needs of micro-limited structures with different geometric shapes and angular positional relationships. It can complete the relevant action process through automated or manual operation and meet the visual monitoring and inspection of the entire forming process.

[0092] (4) The forming device provided by the present invention is used to process micro-limiting structures, which improves the current situation where there are no methods or measures in the field of micro-limiting structure processing. It improves the processing accuracy and quality of non-metallic micro-limiting structures with conical surface seals, reduces the impact of micro-limiting structure forming process on the base conical surface seal structure, and better adapts to the needs of system-level products.

[0093] Based on the forming apparatus for a micro-limiting structure for a conical surface seal of a non-metallic part provided in the above embodiments of the present invention, the present invention also provides a forming method for processing a micro-limiting structure on a non-metallic part using the above-mentioned micro-limiting structure forming apparatus, the forming method comprising:

[0094] Step 1: Install the non-metallic part to be processed into the forming device of the micro-limiting structure, adjust the angular position of the non-metallic part, and align the cutting edge of the pressure pin 10 with the zero position of the indexing line of the fixture body 1.

[0095] Step 2: Control the servo press spindle to apply axial force to the pressure pin connecting shaft 7 along the axial direction, drive the cutting edge of the pressure pin 10 to cut into the surface of the small non-metallic part along the axial direction, and after confirming the processing status through the operation window of the fixture body 1, maintain the pressure value for a specified time. After completion, withdraw the servo press spindle along the axial direction to the safe starting position, and then confirm the forming processing quality through the operation window of the fixture body 1.

[0096] Step 3: Disassemble the first combined nut mechanism 3 and remove the non-metallic parts that have completed the micro-limiting structure forming process.

[0097] The specific installation and assembly methods in step 1 above include:

[0098] Step 11: During the operation, the small non-metallic parts with micro-limiting structure forming requirements are pre-installed on the outer cone structure at the end of the part mounting and positioning mandrel 11, and then installed as a whole into the central shaft hole of the first connecting nut mechanism 3a in the first combined nut mechanism 3. Then, the whole is inserted from one end of the threaded mounting hole of the fixture body 1, and the cylindrical pin 2 is inserted into the corresponding cylindrical pin holes of the first connecting nut mechanism 3a and the fixture body 1 to complete the overall fixation of the part, the first connecting nut mechanism 3a and the part mounting and positioning mandrel 11 mounting structure.

[0099] Step 12: Install the part orientation adjustment mandrel 9 into the central shaft hole of the second connecting nut mechanism 8a in the second combined nut mechanism 8, and then insert it into the other end of the threaded mounting hole of the fixture body 1 as a whole, and install it opposite to the first combined nut mechanism 3. Then, insert the connecting limiting boss at the end of the part orientation adjustment mandrel 9 into the connecting limiting groove of the part mounting positioning mandrel 11, and then insert the cylindrical pin 2 into the corresponding cylindrical pin holes of the second connecting nut mechanism 3a and the fixture body 1 to complete the overall fixation of the second connecting nut mechanism 3a and the part orientation adjustment mandrel 9.

[0100] Step 13: Install the pressure pin 10 into the countersunk hole at the bottom of the pressure pin connecting shaft 7 along the axial direction, so that the top stepped end face of the pressure pin 10 contacts and fits with the outer plane of the countersunk hole end of the pressure pin connecting shaft 7, ensuring the installation stability and coaxiality of the pressure pin connecting shaft 7 and the pressure pin 10; then install the whole assembly into the stepped mounting hole of the fixture body 1 along the axial direction to ensure the installation coaxiality requirements.

[0101] Step 14: Install the indexing instrument 4 into the guide groove of the pressure pin connecting shaft 7 through the guide boss at the inner ring position to ensure a precise fit between the guide boss and the guide groove structure; install the two double-ended studs 6 into the two oblong slots of the indexing instrument 4 and the two stud mounting holes on the upper end face of the fixture body 1 respectively; tighten the nuts 5 on the double-ended studs 6 and fit them against the plane of the indexing instrument 4 to ensure the installation, positioning and indexing work requirements of the indexing instrument 4 on the fixture body 1.

[0102] Step 15: Tighten the first fastening nut 3b of the first combined nut mechanism 3, and rotate the second fastening nut 8b of the second combined nut mechanism 8 to adjust the angular position of the micro-limiting structure of the micro non-metallic part to be processed to the specified position.

[0103] Step 16: Move the boss handle of the indexing instrument 4 and rotate the indexing instrument 4 along the axis. This will cause the pressure pin connecting shaft 7, which is equipped with pressure pin 10, to rotate around its axis until the indicator line of the indexing instrument 4 is aligned with the indexing line of the fixture body 1. This will adjust the position of the cutting edge of the pressure pin 10 to conform to the angular position relationship of the micro-limiting structure to be processed in the micro-non-metallic parts.

[0104] Because there is a zero-position alignment relationship between the cutting edge of the pressure pin 10 and the guide groove of the pressure pin connecting shaft 7, the guide boss of the indexing instrument 4 and the indicator line of the indexing instrument 4, the zero-position alignment of the cutting edge of the pressure pin 10 and the indexing line of the fixture body 1 is guaranteed.

[0105] After completing the installation of the aforementioned micro non-metallic parts and the assembly of the forming fixture, a servo press can be used to control the pressure pin connecting shaft 7 and the pressure pin 10 to complete the micro-limiting structure machining process. After completing the machining process, the following steps are performed:

[0106] Step 3: After completing the machining and forming of the micro-limiting structure on the micro non-metallic part, disassemble the cylindrical pin 2 of the first combined nut mechanism 3, rotate the first fastening nut 3b of the first combined nut mechanism 3 in the reverse direction, and then rotate the first connecting nut 3a in the reverse direction. Remove the first combined nut mechanism 3 containing the micro non-metallic part along the axial direction of the threaded mounting hole of the fixture body 1. Disassemble the micro non-metallic part after machining along the axial direction of the first combined nut mechanism 3. The non-metallic micro-limiting structure is now formed.

[0107] The following is an illustrative description of the implementation of the forming apparatus and method for a micro-limiting structure for a conical seal of non-metallic parts provided by the present invention, through a specific embodiment. Specific Implementation

[0109] See Figures 1 to 13 As shown, the forming device for the micro-limiting structure provided in this specific embodiment example is characterized by comprising: a clamp body 1, a cylindrical pin 2, a first combined nut mechanism 3, an indexing instrument 4, a tightening nut 5, a double-ended stud 6, a pressure pin connecting shaft 7, a second combined nut mechanism 8, a part orientation adjusting mandrel 9, a pressure pin 10, a part mounting and positioning mandrel 11, and a damping spring 12.

[0110] This specific embodiment proposes a force-forming device based on the deformation of the part material and a corresponding process, based on the characteristics of micro-non-metallic parts and their micro-limiting structures.

[0111] A pressure pin 10 with a specific cutting edge structure is used to accurately and reliably align the micro-limiting structure of the non-metallic part's outer wall surface with the processing area along the axial direction.

[0112] Using the indexing instrument 4, the angular position relationship of the cutting edge of the pressure pin 10 is adjusted;

[0113] Set the safe starting position for the axial movement of the servo press spindle. Once in position, confirm the status of the cutting edge of the pressure pin 10 and the small non-metallic parts before processing through the operation window of the fixture body 1.

[0114] Set the axial force and speed parameters for micro-limit structure forming and the force holding parameters after reaching the position in the servo press;

[0115] The axial force applied to the pressure pin 10 is initiated and controlled so that the pressure pin 10 accurately contacts the surface of the micro-limiting structure material of the part. Under the action of the axial force, the forming process of the micro-limiting structure on the part is completed.

[0116] Retract the pressure pin 10 axially to the safe starting position;

[0117] The forming quality of the micro-limiting structure is confirmed through the operation window of the fixture body 1. After confirming that there are no errors, the first combination nut mechanism 3 is disassembled and the small non-metallic parts are removed.

[0118] like Figure 14 The diagram shown illustrates the positional relationship between the pressure pin cutting edge and the non-metallic part during the processing of a micro-limiting structure using the forming device provided in this embodiment of the invention.

[0119] like Figure 14 As shown, by controlling the movement of the pressing pin 10 from its starting position to its pressed position, the processing of the micro-limiting structure of the part is completed, forming the micro-limiting structure of the micro-non-metallic part.

[0120] The mounting structure of the forming device provided in this specific embodiment has been described in the above embodiments. The structure and function of each main component in the forming device will be described in detail below.

[0121] (1) Fixture body 1

[0122] In this specific embodiment, based on the actual working process and the process monitoring requirements for feature forming quality, a fixture body 1 structure with an operation window is proposed:

[0123] Operating windows with a certain angle and width are opened on the wide planes on both sides of the fixture body 1 to ensure the confirmation of the position and state of the part before precision forming of the non-metallic micro-limiting structure, the confirmation of the relative positional relationship between the pressure pin and the part during the forming process, and the confirmation of the precision feature forming quality of the part after forming. This improves the reliability of the precision forming process of the non-metallic micro-limiting structure, the stability of the forming device's working process, and reduces the labor complexity and labor intensity in the above processes. Indexing lines that meet the indexing requirements are formed on the upper end face of the fixture body 1. Two stud mounting holes for mounting double-ended studs 6 are opened on the upper end face of the fixture body for the indexing instrument 4 during the indexing process. The guide rotation; a stepped mounting hole is provided on the upper end face of the fixture body 1 for assembling with the pressure pin connecting shaft 7, so as to achieve the coaxial alignment requirement of the pressure pin connecting shaft 7 after the fixture body 1 is installed; threaded mounting holes penetrating the fixture body 1 are provided on the narrow planes on both sides of the fixture body 1 for installing the first connecting nut 3a and the second connecting nut 8a at both ends of the threaded mounting holes respectively, and cylindrical pin holes for installing cylindrical pins 2 are provided directly below the two ends of the threaded mounting holes, for fixing the first connecting nut 3a after the overall positional relationship of the parts is adjusted, and for fixing the second connecting nut 8a after the overall posture relationship of the parts is adjusted.

[0124] The fixture body 1 serves as the mounting body for the forming device. The indexing instrument 4 is mounted on the upper surface of the fixture body 1 using two double-ended studs 6 and tightening nuts 5. The pressure pin connecting shaft 7, which is equipped with pressure pins 10, is then installed along its guide groove with the guide boss of the indexing instrument 4. The first connecting nut 3a, which is equipped with the part mounting and positioning mandrel 11, and the second connecting nut 8a, which is equipped with the part orientation adjusting mandrel 7, are then installed into the threaded mounting holes on the narrow planes on both sides of the fixture body 1 through a threaded structure. After adjustment, the two cylindrical pins 2 are installed into the cylindrical pin holes on the narrow planes on both sides of the fixture body, thus completing the overall installation of the forming device.

[0125] (2) First combined nut mechanism 3

[0126] In this specific embodiment, based on the installation and positioning requirements of small non-metallic parts, a structural scheme of a first combined nut mechanism 3 with precise part position adjustment function is proposed. This includes a first connecting nut 3a for overall structural connection and a first fastening nut 3b for fine-tuning position. The two work together to form the first combined nut mechanism 3. The first connecting nut 3a is configured with a hollow structure having a central shaft hole, forming a precise shaft-hole fit with the part installation and positioning mandrel 11. It uses an external thread structure on the shaft to connect with the fixture body 1, ensuring the installation relationship between the part and the fixture body 1 after installation and positioning. While satisfying the connection function, this improves the fit accuracy and reduces the structural weight. The first fastening nut 3b uses a fine-pitch internal thread structure, threadedly connecting with the fine-pitch external thread of the part installation and positioning mandrel 11. Based on the overall positional adjustment of the non-metallic parts completed by the first connecting nut 3a, it achieves axial tension of the part installation and positioning mandrel 11, ensuring precise part position adjustment. Furthermore, based on the slippage and free-spinning function of the first fastening nut 3b, it ensures that the part installation and positioning mandrel 11 does not experience excessive axial tension, deformation, or damage.

[0127] The first connecting nut 3a is screwed onto the fixture body 1 via an external thread on the shaft, thereby adjusting the overall positional relationship of the parts. The part mounting and positioning spindle 11 forms a mating relationship with the first connecting nut 3a through a shaft hole mating structure, and the three are connected as one by the first fastening nut 3b, thereby achieving precise adjustment of the position of the non-metallic parts.

[0128] (3) Part mounting and positioning mandrel 11 installed via the first combined nut mechanism 3

[0129] In this specific embodiment, based on the installation and positioning requirements of micro non-metallic parts, a structural scheme for a part installation and positioning mandrel 11 with part installation and positioning function is proposed. This mandrel adopts a four-section integrated structure, consisting of a part installation section, a part limiting section, a guide installation section, and a threaded fine-tuning section arranged sequentially from the inner end to the outer end. The first part installation section is designed as an outer cone structure to accommodate the nested installation of the inner cone hole structure of the micro non-metallic part, effectively simulating the sealing of the part's conical surface. A symmetrical plane with a specific length, width, and depth is opened at a specific position on the outer cone structure to accommodate material deformation during the forming process of the micro-limiting structure of the micro non-metallic part. A certain type of... The connecting limiting groove has a specific length, width, and depth to adapt to the axial positioning connection with the part orientation adjusting mandrel 9, enabling precise adjustment of the part's posture based on the part's installation and positioning. The second part limiting section is set as an annular step structure to meet the axial positioning requirements of small non-metallic parts, as well as the axial limiting of the connection structure with the first connecting nut 3a. The third guide mounting section is set as a slender mandrel body to achieve a reliable connection with the first connecting nut 3a and ensure the installation coaxiality requirements. The fourth threaded fine-tuning section is set as a fine-pitch external thread to achieve a reliable connection with the first fastening nut 3b, ensuring the reliability of the axial tension of the part installation and positioning mandrel and the fine-tuning requirements.

[0130] The part mounting and positioning mandrel 11 is installed in the central shaft hole of the first connecting nut 3a through the slender structure of the guide mounting section. Then, it is inserted from one end of the threaded mounting hole of the fixture body 1. The connecting limiting groove of the mandrel 11 is then matched with the connecting limiting boss of the part orientation adjustment mandrel 9 to connect the two into one, so as to meet the rotation orientation adjustment requirements along the axis. Finally, the first fastening nut 3b is installed into the threaded fine-tuning section of the part mounting and positioning mandrel 11 to complete the threaded connection.

[0131] (4) Second combined nut mechanism 8

[0132] In this specific embodiment, based on the angular position characteristics of the micro-limiting structure of a small non-metallic part, a second combined nut mechanism 8 with a precise attitude adjustment function for the part is proposed. It includes a second connecting nut 8a that realizes the overall connection of the structure and a second fastening nut 8b that realizes the attitude fine adjustment. The two cooperate with each other to form the second combined nut mechanism 8. The second connecting nut 8a adopts a hollow structure with a central shaft hole, forming a precise shaft-hole fit with the part attitude adjustment mandrel 9. It uses an external thread structure on the shaft to connect with the fixture body 1, ensuring the installation relationship between the part and the fixture body 1 after installation and positioning. While satisfying the connection function, it improves the fit accuracy and reduces the structural weight. The second fastening nut 8b adopts a fine-pitch internal thread structure, which is threaded to the fine-pitch external thread of the part attitude adjustment mandrel 9. After the second connecting nut 8a completes the overall posture relationship adjustment of the part, it realizes the axial tension of the part attitude adjustment mandrel 9, ensuring the precise adjustment of the part's posture. Based on the slippage and free rotation function of the second fastening nut 8b, it ensures that after the part's posture is adjusted to the position, the part attitude adjustment mandrel 9 will not experience excessive axial force or deformation and damage to the mechanism, ensuring the accuracy of the axial and circumferential posture adjustment of the mechanism.

[0133] The second connecting nut 8a is screwed onto the fixture body 1 via an external thread on the shaft, thereby adjusting the overall position of the part. The part mounting and attitude adjustment spindle 9 forms a mating relationship with the second connecting nut 8a through a shaft hole mating structure, and the three are connected as one by the second fastening nut 8b, thereby achieving precise adjustment of the part's posture.

[0134] (5) Part orientation adjustment mandrel 9 installed via the second combined nut mechanism 8

[0135] In this specific embodiment, based on the angular position characteristics of the micro-limiting structure of a micro non-metallic part, a structural scheme for a part attitude adjustment mandrel 9 with part attitude adjustment is proposed. This scheme employs a five-segment integrated structure, consisting of a connection limiting segment, a transition segment, a part limiting segment, a guide mounting segment, and a threaded fine-tuning segment arranged sequentially from the inner end to the outer end. The first connection limiting segment is configured as a connection limiting boss to adapt to the connection limiting groove structure of the part mounting and positioning mandrel 11, achieving a positioning connection with the part mounting and positioning mandrel 11. The second transition segment is configured as an external conical surface structure to reduce the size of the part attitude adjustment mandrel. The axial force during the connection between shaft 9 and part mounting and positioning mandrel 11; the third part limiting section is set with an annular step to achieve axial limiting in the connection structure with the second connecting nut 8a; the fourth guide mounting section is set with a slender shaft structure to achieve reliable connection with the second connecting nut 8a and ensure the coaxiality requirement of the installation; the fifth thread fine adjustment section is set with a fine external thread structure to achieve reliable connection with the second fastening nut 8b and can be used to adjust the rotation angle of the part orientation adjusting mandrel 9 to ensure the reliability of the axial tension of the part orientation adjusting mandrel 9 and the fine adjustment requirements.

[0136] The part orientation adjustment mandrel 9 is installed in the central shaft hole of the second connecting nut 8a through the slender structure of the guide mounting section. Then, it is installed from the other end of the threaded mounting hole of the fixture body 1. The connecting limiting boss of the mandrel 9 is then matched with the connecting limiting groove of the part mounting and positioning mandrel 11 to connect the two into one, so as to meet the rotational orientation adjustment requirements along the axis. Finally, the second fastening nut 8b is installed into the threaded fine-tuning section of the part orientation adjustment mandrel to complete the threaded connection.

[0137] (6) A press-pin connecting shaft with axial guiding and circumferential rotation functions 7

[0138] In this specific embodiment, based on the actual working process and working principle, a structural scheme for a pressure pin connecting shaft 7 with axial guidance and circumferential rotation function is proposed. Specifically, based on the mounting hole accuracy of the fixture body 1, the outer diameter and tolerance requirements of the major diameter shaft of the pressure pin connecting shaft 7 are proposed to meet the hole-shaft precision fit requirements and coaxial alignment requirements, thereby improving the circumferential rotation accuracy of the pressure pin connecting shaft 7 around the axis. A guide groove is provided on one side of the upper end of the pressure pin connecting shaft 7 for precise fit with the guide boss structure of the indexing instrument 4, so as to achieve the purpose of driving the pressure pin connecting shaft 7 to rotate synchronously during the indexing process of the indexing instrument 4 rotating around the axis. According to the outer diameter connection requirements of the stepped end face of the pressure pin 10, a countersunk hole is provided on the minor diameter shaft of the pressure pin connecting shaft 7 to meet the fit size and tolerance requirements of the outer diameter of the stepped end face of the pressure pin 10, thereby meeting the hole-shaft precision fit requirements and coaxial alignment requirements, and achieving the axial positioning requirements of the contact fit between the minor diameter shaft end face of the pressure pin connecting shaft 7 and the stepped end face of the pressure pin 10.

[0139] The pressure pin connecting shaft 7 is installed in the stepped mounting hole of the fixture body 1 and cooperates with the guide boss of the indexing instrument 4 installed on the upper end of the fixture body 1 to realize the axial guiding function and the rotation indexing function around the axis; the pressure pin 10 is interference fitted in the countersunk hole of the small diameter shaft of the pressure pin connecting shaft 7 to achieve axial positioning with the stepped end face of the pressure pin 10.

[0140] (7) Pressing pin 10 used to achieve precision forming of micro-limiting structure of part

[0141] In this specific embodiment, based on the characteristics of the micro non-metallic parts and their micro-limiting structures, a structural scheme for the pressure pin 10 that meets the forming and processing requirements of the micro-limiting structure is proposed. Specifically, a cutting edge with a certain cutting depth, cutting width, and cutting angle is provided at the working end of the pressure pin 10 to meet the geometric characteristics and processing requirements of the micro-limiting structure. The pressure pin 10 is configured as a stepped shaft structure along the axial direction to meet the axial positioning of the pressure pin after it is installed to the pressure pin connecting shaft 7. A conical structure is provided between the stepped end face and the cutting edge as a transition connection surface to reduce the stress concentration existing in the direct transition of the outer circle of the cylinder and improve the service life of the pressure pin. A flat surface is formed on the outer circle of the large diameter shaft on the stepped end face of the pressure pin 10 and is used for clamping during the installation process of the pressure pin 10.

[0142] The pressure pin 10 is installed in the countersunk hole of the pressure pin connecting shaft 7 through an interference fit of its small diameter shaft, and is axially positioned with the pressure pin connecting shaft 7 through the stepped end face. This ensures that the axial force applied during the forming process is reliably transmitted to the working end of the pressure pin along the pressure pin connecting shaft, reducing the direct force applied to the pressure pin during the process and improving the service life of the pressure pin.

[0143] (8) Indexing instrument 4 adapted to the forming and processing requirements of non-metallic micro-limited structures

[0144] In this specific embodiment, based on the characteristics of micro non-metallic parts and their micro-limiting structures, a structural scheme for an indexing device adapted to the precision forming and processing requirements of micro non-metallic parts and their micro-limiting structures is proposed. This scheme adapts to the forming and processing requirements of the limiting feature angular positions of different structural forms. Specifically, it features symmetrically arranged double-waisted slots that allow the indexing instrument 4 to rotate circumferentially along its axis and have guiding accuracy requirements; a boss handle that allows the indexing instrument 4 to rotate circumferentially along its axis and has a toggle function; a guide boss that allows the pressure pin connecting shaft to move axially and has axial precision guiding function; and an inclined platform that improves the alignment accuracy between the indexing instrument 4 indicator line and the indexing scale line of the fixture body.

[0145] The indexing instrument 4 is installed on the upper end face of the fixture body 1. It is guided, positioned and tightened by two double-ended studs 6 and tightening nuts 5. By moving the boss handle of the indexing instrument 4, the indexing device is rotated along the double-ended studs in the double waist-shaped slot. The indexing position is determined by the alignment between its indicator line and the indexing scale line on the fixture body 1.

[0146] It should be noted that the forming apparatus provided in the above embodiments of the present invention can apply the axial force of the pressure pin in a manual or automated manner, thus expanding the range of implementation methods.

[0147] While the embodiments disclosed in this invention are as described above, they are merely illustrative of the embodiments to facilitate understanding of the invention and are not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and variations in the form and details of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection for this invention shall still be determined by the scope defined in the appended claims.

Claims

1. A forming device for a micro-limiting structure for sealing conical surfaces of non-metallic parts, characterized in that, include: The fixture body (1), cylindrical pin (2), first combined nut mechanism (3), indexing instrument (4), pressure pin connecting shaft (7), second combined nut mechanism (8), part attitude adjustment mandrel (9), pressure pin (10) and part mounting and positioning mandrel (11); The fixture body (1) is generally provided with a cuboid structure. A threaded mounting hole is provided through the fixture body (1) along the length direction at the lower part. A stepped mounting hole is provided in the middle of the upper end face of the fixture body (1). The threaded mounting hole and the stepped mounting hole are perpendicular to each other and connected. The upper end face is also formed with an indexing line. An operation window is provided on the two wide planes on the sides of the fixture body (1). The fixture body (1) is fitted with the first combined nut mechanism (3) and the second combined nut mechanism (8) through its threaded mounting holes at both ends, and is fixedly connected by a cylindrical pin (2); wherein, a part mounting and positioning mandrel (11) is sleeved in the central shaft hole of the first combined nut mechanism (3), and a part attitude adjustment mandrel (9) is sleeved in the central shaft hole of the second combined nut mechanism (8). The non-metallic part to be processed is sleeved on the outer conical structure of the inner end of the part mounting and positioning mandrel (11), and the inner ends of the part attitude adjustment mandrel (9) and the part mounting and positioning mandrel (11) are axially positioned and connected, and the angular position of the non-metallic part is adjusted by the rotation of the part attitude adjustment mandrel (9); The stepped mounting hole on the upper end face of the fixture body (1) is used to install the pressure pin connecting shaft (7), and the pressure pin (10) is installed in the countersunk hole at the bottom end of the pressure pin connecting shaft (7) to apply cutting force to the outer wall surface of the non-metallic part so as to process a micro-limiting structure on the inner conical surface of the non-metallic part. The indexing instrument (4) is positioned and mounted in the guide groove on the upper side of the pressure pin connecting shaft (7) by the guide boss set on one side of its inner ring. The bottom end face of the indexing instrument (4) is close to the upper end face of the fixture body (1). By adjusting the indicator line of the indexing instrument (4) to the middle position, the cutting edge of the pressure pin (10) is aligned with the zero position of the indexing scale line of the fixture body (1). The operation window on the fixture body (1) is used for the installation, positioning, position adjustment and manual monitoring of non-metallic parts during the processing.

2. The forming apparatus according to claim 1, characterized in that, Also includes: Tighten the nut (5) and the stud (6); The upper end face of the fixture body (1) is symmetrically provided with two stud mounting holes along the center line of the indexing scale. The indexing instrument (4) is symmetrically provided with two waist-shaped slots along the center line of its guide boss. Double-headed studs (6) are installed in the waist-shaped slots of the indexing instrument (4) and the stud mounting holes at corresponding positions on the fixture body (1), and are fixed by tightening the nut (5) on the top of the double-headed studs (6). The indexing instrument (4) has a ramp on one side of the guide boss, which corresponds to the position of the indexing line on the fixture body (1). The indicator line formed radially on the ramp is located on the center line of the guide boss. A boss handle is also provided at the opposite end of the ramp to adjust the position of the indexing instrument (4) by means of the indicator line and the boss handle.

3. The forming apparatus according to claim 2, characterized in that, The first combined nut mechanism (3) includes: a first connecting nut (3a) and a first fastening nut (3b); The first connecting nut (3a) has a disc-shaped connecting baffle at its outer end. An external thread is formed on the shaft of the nut near the connecting baffle, which is used to screw it into one end of the threaded connection hole in the fixture body (1). The first connecting nut (3a) has a central shaft hole, which is used to insert the through-mounting part mounting positioning mandrel (11) through the central shaft hole, so that the non-metallic part sleeved on the outer conical structure at its inner end is located in the threaded mounting hole, and the fine external thread at the outer end is located outside the connecting baffle. The connecting baffle and the fixture body (1) both have pin holes on their opposite end faces, which are used to fix the first connecting nut (3a) and the fixture body (1) with a cylindrical pin (2). The first fastening nut (3b) is screwed onto the fine external thread of the part mounting and positioning mandrel (11) and is used to lock the part mounting and positioning mandrel (11) in the axial position of the first connecting nut (3a) by means of the first fastening nut (3b).

4. The forming apparatus according to claim 3, characterized in that, The part mounting and positioning mandrel (11) is configured as a four-section integrated structure; The outer conical structure at the inner end of the part mounting and positioning mandrel (11) is used to mount the non-metallic part to be processed, thereby simulating the sealing of the conical surface of the part. A symmetrical plane is formed on the outer conical structure, and a connecting and limiting groove is provided on the end face of the outer conical structure for positioning and connecting with the part orientation adjusting mandrel (9). An annular boss is provided between the outer conical structure and the mandrel body to axially limit the part mounting and positioning mandrel (11) and the first connecting nut (3a) through the annular boss. The mandrel body is used to connect with the central shaft hole of the first connecting nut (3a), and the end of the mandrel body is set with a fine external thread to achieve a threaded connection with the first fastening nut (3b).

5. The forming apparatus according to claim 3, characterized in that, The second combined nut mechanism (8) includes: a second connecting nut (8a) and a second fastening nut (8b); The second connecting nut (8a) has a disc-shaped connecting baffle at its outer end. An external thread is formed on the shaft of the nut near the connecting baffle, which is used to screw it onto the other end of the threaded connecting hole in the fixture body (1). The second connecting nut (8a) has a central shaft hole, which is used to insert the through-mounting part adjustment mandrel (9) through the central shaft hole, so that the connecting limiting boss at its inner end is nested and mated in the connecting limiting groove on the inner end face of the part mounting positioning mandrel (11). The fine external thread at its outer end is located outside the connecting baffle. The connecting baffle and the fixture body (1) both have pin holes on their opposite end faces, which are used to fix the second connecting nut (8a) and the fixture body (1) with a cylindrical pin (2). The second fastening nut (8b) is screwed onto the fine external thread of the mounting part orientation adjustment mandrel (9). It is used to drive the mounting part orientation adjustment mandrel (9) and the part mounting positioning mandrel (11) to rotate synchronously through the rotation of the second fastening nut (8b) in order to adjust the angular position of the non-metallic part mounted on the part mounting positioning mandrel (11).

6. The forming apparatus according to claim 5, characterized in that, The configuration is a five-segment integrated structure; The inner end face of the part adjustment mandrel (9) is provided with a connecting limiting boss for positioning and connecting with the part mounting and positioning mandrel (11). The connecting limiting boss and the mandrel body have an outer conical surface structure and an annular boss, which are used to reduce the axial force during the connection between the part adjustment mandrel (9) and the part mounting and positioning mandrel (11) through the outer conical structure, and to axially limit the part adjustment mandrel (9) and the second connecting nut (8a) through the annular boss. The mandrel body is used to connect with the central shaft hole of the second connecting nut (8a), and the end of the mandrel body is provided with a fine external thread to realize the threaded connection with the second fastening nut (8b).

7. The forming apparatus according to any one of claims 1 to 6, characterized in that, The pressure pin connecting shaft (7) is configured as a stepped shaft structure, which cooperates with the stepped mounting hole on the fixture body (1). A guide groove is provided on one side of the large diameter shaft at the upper part of the pressure pin connecting shaft (7), and a countersunk hole is provided on the bottom end face of the small diameter shaft for installing the pressure pin (10). The pressure pin (10) is configured as a stepped shaft structure. The upper small diameter shaft is installed in the countersunk hole at the bottom of the pressure pin connecting shaft (7) by interference fit. The lower large diameter shaft and the bottom working end are provided with a transition connecting surface of a cone structure. The large diameter shaft has symmetrically arranged flat surfaces for clamping during the installation of the pressure pin (10). The working end at the bottom of the pressure pin (10) has a cutting edge with a preset cutting depth, preset cutting width, and preset cutting angle.

8. The forming apparatus according to claim 7, characterized in that, Also includes: Damping spring (12); The first mounting ring groove (1a) is provided on the stepped end face of the stepped shaft hole of the clamp body (1), and the second mounting ring groove (7a) is provided on the stepped end face of the pressure pin connecting shaft (7). A damping spring (12) is installed between the first mounting ring groove (1a) and the second mounting ring groove (7a). The damping spring (12) is used to provide damping and buffering effect during the pressing process after an axial force is applied to the pressure pin (10) and the pressure pin connecting shaft (7); It is also used to provide a spring force for resetting the pressure pin (10) and the pressure pin connecting shaft (7) after the pressing is finished and the axial force is removed.

9. A method for forming a micro-limiting structure for a conical surface seal of a non-metallic part, characterized in that, A forming method for machining micro-limiting structures on non-metallic parts using the forming apparatus for micro-limiting structures for conical surface sealing of non-metallic parts as described in any one of claims 1 to 8, the forming method comprising: Step 1: Install the non-metallic part to be processed into the forming device of the micro-limiting structure, adjust the angular position of the non-metallic part, and align the cutting edge of the pressure pin (10) with the zero position of the indexing line of the fixture body (1); Step 2: Control the servo press spindle to apply axial force to the pressure pin connecting shaft (7) along the axial direction, drive the cutting edge of the pressure pin (10) to cut into the surface of the small non-metallic part along the axial direction, and after confirming the processing status through the operation window of the fixture body (1), maintain the pressure value for a specified time. After completion, withdraw the servo press spindle along the axial direction to the safe starting position, and then confirm the forming processing quality through the operation window of the fixture body (1).

10. The forming method according to claim 9, characterized in that, Step 1 includes: Step 11: Install the small non-metallic part on the outer conical structure at the end of the part mounting and positioning mandrel (11), install the part mounting and positioning mandrel (11) with the part installed into the central shaft hole of the first connecting nut mechanism (3a), and then insert the whole into the threaded mounting hole of the fixture body (1), and use a cylindrical pin (2) to fix the first connecting nut mechanism (3a) and the fixture body (1); Step 12: Install the part orientation adjustment mandrel (9) into the central shaft hole of the second connecting nut mechanism (8a), and then insert it into the other end of the threaded mounting hole of the fixture body (1) as a whole, and install it opposite to the first combined nut mechanism (3). Insert the connecting limiting boss at the end of the part orientation adjustment mandrel (9) into the connecting limiting groove of the part mounting positioning mandrel (11), and use cylindrical pins (2) to fix the second connecting nut mechanism (3a) and the corresponding cylindrical pin holes of the fixture body (1). Step 13: Install the pressure pin (10) into the countersunk hole at the bottom of the pressure pin connecting shaft (7) along the axial direction, and ensure the installation stability and coaxiality of the pressure pin connecting shaft (7) and the pressure pin (10); then install the whole assembly into the stepped mounting hole of the fixture body (1) along the axial direction. Step 14: Install the indexing instrument (4) into the guide groove of the pressure pin connecting shaft (7) through the guide boss on one side of the inner ring. Install the two double-headed studs (6) into the two waist-shaped slots of the indexing instrument (4) and the two stud mounting holes on the upper end face of the fixture body (1). Tighten the nuts (5) on the double-headed studs (6) and fit them against the plane of the indexing instrument (4). Step 15: Tighten the first fastening nut (3b) of the first combined nut mechanism (3), and rotate the second fastening nut (8b) of the second combined nut mechanism (8) to adjust the angular position of the micro-limiting structure of the micro non-metallic part to be processed to the specified position; Step 16: Rotate the indexing instrument (4) by turning the boss handle of the indexing instrument (4), which will drive the pressure pin connecting shaft (7) equipped with the pressure pin (10) to rotate until the indicator line of the indexing instrument (4) is aligned with the indexing line of the fixture body (1), thereby adjusting the position of the cutting edge of the pressure pin (10) to conform to the angular position relationship of the micro-limiting structure to be processed of the micro non-metallic parts.

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