Clamp tool and machining process for open elastic sealing ring

Abstract

The application relates to the technical field of aviation part machining, and discloses a clamp tool for an open elastic sealing ring and a machining process. The clamp tool for the open elastic sealing ring comprises a supporting seat, a mounting seat and a clamping assembly; the supporting seat is arranged on a clamp base; the mounting seat is arranged on the clamp base; one end of the mounting seat extends to the inner side of the supporting seat, and the other end extends to the outer side of the supporting seat; the clamping assembly is arranged on the mounting seat and can be transferred between the inner side of the supporting seat and the outer side of the supporting seat. The machining process of the open elastic sealing ring comprises the following steps: rough turning ring forging material, cutting blanking, fine grinding both ends of a workpiece, clamping and machining an opening and a lap joint structure through the clamp tool, and adjusting the clamp tool to fine turn the inner hole and the outer circle of the annular sheet. The technical scheme can solve the technical problem that multiple different tools need to be used to clamp the sealing ring when the sealing ring is machined in different forms and at different positions.

Description

Technical Field

[0001] This invention relates to the field of aerospace component processing technology, and in particular to a fixture and processing technology for an open elastic sealing ring. Background Technology

[0002] The combustion section connection seal of a certain type of aero-engine is made of GH4145 material. It is annular and open, with overlapping structures machined on both sides of the opening. When processing the inner hole and outer circle of the sealing ring, it is necessary to process the outer and inner sides of the sealing ring respectively, and multiple different toolings are required to clamp it. Summary of the Invention

[0003] This application discloses a fixture and processing technology for an open elastic sealing ring, in order to solve the technical problem in the related art that when processing sealing rings of different shapes and positions, multiple different fixtures are required to clamp them.

[0004] To solve the above problems, the present invention adopts the following technical solution: In a first aspect, this application discloses a fixture for an open elastic sealing ring, comprising: Support base, mounted on the fixture base; Mounting base, provided on the clamp base; one end of the mounting base extends to the inside of the support base, and the other end extends to the outside of the support base; A clamping assembly, disposed on the mounting base, is movable between the inside and outside of the support base; the clamping assembly is used to clamp the workpiece in the support base.

[0005] Optionally, the mounting base includes a first connecting part and a second connecting part, the first connecting part being located inside the support base and the second connecting part being located outside the support base.

[0006] Optionally, the clamping assembly includes a lateral clamp and a top clamp, the lateral clamp being movable between the inside and outside of the support, and the top clamp being detachably connected to the first connecting portion and the second connecting portion, respectively. The lateral clamping member is used to abut against the side wall of the workpiece, and the top clamping member is used to abut against the top of the workpiece.

[0007] Optionally, the lateral clamping member includes a driving part and a lateral abutment part. The driving part is disposed on the mounting base and connected to the lateral abutment part to drive the lateral abutment part to abut against the workpiece.

[0008] Optionally, the drive unit includes a lead screw and a control end. The lead screw is disposed on the mounting base and is connected to the lateral abutment part. One end of the lead screw passes through the first connection part or the second connection part and is connected to the control end. And / or, the lateral contact portion includes a mating seat and a contact plate, the mating seat being connected to the drive portion, and the contact plate being used to contact the workpiece and being detachably mounted on the mating seat.

[0009] Optionally, the top clamping member includes a clamping plate and a rotating shaft. The clamping plate is rotatably connected to the first connecting part or the second connecting part via the rotating shaft, and the rotating shaft can be separated from the first connecting part and the second connecting part.

[0010] Optionally, the clamping assembly may also include a locking element disposed on the clamping plate; After the top clamping member and the side clamping member stop the workpiece against the support base, the locking member connects with the mating base to make the clamping plate clamp the workpiece.

[0011] Optionally, the locking component includes a slider and a mating block; the clamping plate is provided with a groove, and the slider is slidably disposed in the groove; the mating block is rotatably connected to the slider; the mating block is provided with a mating hole; the mating seat is provided with a mating hole; When the locking component is connected to the mating seat, the mating hole of the mating block and the mating hole of the mating seat are coaxial and connected by a connector; the connector applies a force along the axial direction of the mating hole, forcing the top clamping component to press against the workpiece against the support seat.

[0012] Optionally, the abutment plate is movably sleeved onto the mating seat; And / or, a movable pressure plate is rotatably connected to one end of the clamping plate corresponding to the workpiece; And / or, the support base is set on the fixture base by multiple pillars, and an active space for the mating seat to pass through is formed between any two adjacent pillars; the support base is composed of several support plates surrounding it, and the pillars are slidably set on the fixture base.

[0013] Secondly, this application also discloses a processing technology for an open elastic sealing ring, which is applied to the fixture of the open elastic sealing ring in the first aspect, including the following steps: Step 1. Roughly machine the inner hole and outer circle of the ring forging material, leaving allowance for each; Step 2. Cut the material into a ring-shaped sheet, leaving a margin on both ends of the ring-shaped sheet; Step 3. Finely grind the end faces of the annular sheet; Step 4. Place the annular sheet on the fixture, clamp it, and machine an opening. Machine overlapping structures at the ends on both sides of the opening. Step 5. Adjust the fixture to make the two ends of the annular sheet overlap to a certain distance, and determine the machining center of the outer circle and the inner hole based on the end overlap; Step 6. Precision machine the inner hole and outer circle of the annular sheet to the final dimensions, forming the open elastic sealing ring. The technical solution adopted in this invention can achieve the following beneficial effects: 1. The present invention provides a fixture for an open elastic sealing ring, which can be moved inside and outside the support base by means of a clamping component. When processing the inner hole and outer circle of the sealing ring, the clamping component moves between the inner and outer sides of the support base. When processing the inner hole of the sealing ring, the clamping component moves to the outer side of the support base to clamp the outer side of the sealing ring, leaving processing space for the processing tool on the inner side of the sealing ring. When processing the outer circle of the sealing ring, the clamping component moves to the inner side of the support base to clamp the inner side of the sealing ring, leaving processing space for the processing tool on the outer side of the sealing ring. 2. The fixture for an open elastic sealing ring provided by the present invention has multiple lateral abutment parts that abut against the sealing ring, and the shape of the sealing ring can be adjusted in real time during processing. The sealing ring can be driven to a designated position by adjusting the lateral abutment parts to confirm the processing center, so as to reduce dimensional errors when processing the inner hole and outer circle in the subsequent process. 3. The present invention provides a fixture for an open elastic sealing ring. After the traditional fixture clamps and processes one side of the sealing ring, a specific fixture is required to clamp the sealing ring and adjust the reference. This device adjusts the position of the lateral contact part by the drive unit and changes the position of the support seat to realize the switching between the constrained state and the free state of the sealing ring, adapting to the processing of the sealing ring under different states, thereby improving the versatility of the device. 4. The fixture for an open elastic sealing ring provided by this invention extensively employs detachable (e.g., the connection between the top clamping component and the mounting base), sliding (e.g., the slider of the locking component), and movable (e.g., the movable pressure plate) designs. This allows a single set of fixtures to adapt to the processing requirements of open elastic sealing rings of different sizes and specifications by replacing or adjusting a few components (e.g., the abutment plate, the clamping plate), reducing the specialization and manufacturing cost of the fixtures and broadening their application range. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the fixture tooling used to process openings, as disclosed in some embodiments of this application; Figure 2 It is attached Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the fixture tooling used for precision machining of inner holes as disclosed in some embodiments of this application; Figure 4 It is attached Figure 3Enlarged view at point B in the middle; Figure 5 This is a schematic diagram of the fixture tooling used for finishing the outer diameter as disclosed in some embodiments of this application; Figure 6 It is attached Figure 5 Enlarged view at point C; Figure 7 It is attached Figure 1 Sectional view at point aa; Figure 8 It is attached Figure 7 Enlarged view at point D; Figure 9 These are schematic diagrams of the workpiece structure disclosed in some embodiments of this application; Figure 10 This is a schematic diagram of the machining dimensions of a workpiece disclosed in some embodiments of this application.

[0016] In the picture: 1-Clamp base, 101-Adjusting groove, 102-Positioning seat, 2-Support seat, 201-Column, 3-Mounting seat, 301-Lead screw, 302-Control end, 303-Rotating hole, 304-Matching seat, 305-Abutting plate, 306-Sleeve, 307-Mounting hole, 308-First connecting part, 309-Second connecting part, 4-Clamping plate, 401-Through groove, 402-Slide groove, 403-Matching block, 404-Slider, 405-Connector, 406-Modible pressure plate, 407-Matching hole, 408-Modible ear plate, 409-Rotating shaft, 5-Sealing ring, 501-Overlapping structure. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0018] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0019] When processing the inner hole and outer circle of the sealing ring 5, it is necessary to process the outer and inner sides of the sealing ring 5 respectively. Multiple different toolings are required to clamp it. Therefore, it is necessary to design a set of tooling that can clamp the sealing ring 5 at different positions by disassembling and assembling the clamping components.

[0020] like Figure 1 and 2 As shown, a fixture for an open elastic sealing ring includes a fixture base 1, a support base 2, a mounting base 3, and a clamping assembly; the fixture base 1 serves as the base of this device and is used to install and fix other components, providing a support platform for other components; the fixture base 1 is preferably circular plate-shaped to adapt to processes such as annular turning of the sealing ring 5. The support base 2 is set on the working plane on one side of the fixture base 1. The workpiece to be processed is placed on the support base 2 to provide bottom support for the workpiece. The shape of the support base 2 is preferably annular to adapt to the annular shape of the sealing ring 5, so that the sealing ring 5 can be placed on the surface of the annular support base 2. Mounting base 3 is set on the working plane on one side of the clamp base 1. There are several of them, and they are arranged around the support base 2 to facilitate clamping the sealing ring 5 around the circumference. One end of the mounting base 3 extends to the inner side of the support base 2, and the other end extends to the outer side of the support base 2, providing installation positions for clamping the inner and outer sides of the sealing ring 5 respectively. The clamping assembly is connected to the mounting base 3 and can be moved between the inner side and the outer side of the support base 2. It is used to clamp the inner and outer sides of the sealing ring 5 respectively. The clamping assembly and the support base 2 clamp the sealing ring 5 between them, providing a stable clamping force.

[0021] like Figure 2 As shown, in one embodiment, the mounting base 3 includes a first connecting portion 308 and a second connecting portion 309. The first connecting portion 308 is located inside the support base 2, and the second connecting portion 309 is located outside the support base 2, respectively for providing mounting positions for the clamping assembly. The clamping assembly includes a lateral clamp and a top clamp; the lateral clamp can move between the inner side and the outer side of the support 2, and abuts against the side wall of the sealing ring 5 to provide support for the outer side of the sealing ring 5. The shape of the sealing ring 5 can also be changed by changing the position of the lateral clamp, thus providing support for different processing steps. The top clamping member is detachably connected to the first connecting part 308 and the second connecting part 309 respectively, and abuts against the top of the workpiece in different processing steps. When the top clamping member is installed on the first connecting part 308 inside the support base 2, the sealing ring 5 is pressed by the cooperation between the top clamping member and the support base 2, so that processing space is left on the outer side of the sealing ring 5, so as to facilitate the process of processing the outer circle of the sealing ring 5. When the top clamping member is installed on the second connecting part 309 outside the support base 2, the sealing ring 5 is pressed by the cooperation between the top clamping member and the support base 2, so that processing space is left on the inner side of the sealing ring 5, so as to facilitate the process of processing the inner hole of the sealing ring 5. Specifically, the top clamping component includes a clamping plate 4 and a rotating shaft 409. The top of the first connecting part 308 and the second connecting part 309 are respectively provided with rotating holes 303. The clamping plate 4 is rotatably connected to the rotating holes 303 of the first connecting part 308 or the second connecting part 309 through the rotating shaft 409. The rotating shaft 409 is connected to the rotating holes 303 by insertion, so that the rotating shaft 409 can be separated from the first connecting part 308 and the second connecting part 309 to achieve the effect of disassembly and transfer. The rotating shaft 409 is located at one end of the clamping plate 4. When the clamping plate 4 is connected to the first connecting part 308 or the second connecting part 309 through the rotating shaft 409, the clamping plate 4 rotates around the rotating hole 303, so that the other end of the clamping plate 4 abuts against the top of the sealing ring 5. Specifically, after the rotating shaft 409 of the clamping plate 4 is inserted into the rotating hole 303, it is necessary to prevent the rotating shaft 409 from slipping out. A movable ear plate 408 is provided at the end of the rotating shaft 409 away from the connection with the clamping plate 4. One end of the movable ear plate 408 is hinged to one side of the clamping plate 4. After the rotating shaft 409 is inserted into the rotating hole 303, the other end of the movable ear plate 408 rotates to one end of the rotating shaft 409 and connects with it to prevent the rotating shaft 409 from slipping out of the rotating hole 303. Preferably, the other end of the movable ear plate 408 is provided with a through hole, and one end of the rotating shaft 409 is provided with a screw hole. When the other end of the movable ear plate 408 rotates to one end of the rotating shaft 409, the through hole of the movable ear plate 408 and the screw hole of the rotating shaft 409 are coaxially corresponding and connected by bolts passing through the through hole and engaging with the screw hole. This enhances the stability of the detachable connection between the clamping plate 4 and the first connecting part 308 or the second connecting part 309. Specifically, to enhance the tightness of the contact between one end of the clamping plate 4 and the top of the sealing ring 5, a movable pressure plate 406 is rotatably connected to one end of the clamping plate 4 corresponding to the workpiece, so that the contact surface of the movable pressure plate 406 always faces the top of the sealing ring 5. When the clamping plate 4 rotates around the rotating hole 303, the contact surface of the movable pressure plate 406 contacts the top of the sealing ring 5. Preferably, the contact surface of the movable pressure plate 406 is provided with anti-slip texture to reduce the slippage of the sealing ring 5 during processing.

[0022] like Figure 2-8As shown, in one embodiment, the lateral clamping member includes a driving part and a lateral abutment part. The driving part is disposed on the mounting base 3 and connected to the lateral abutment part. It can drive the lateral abutment part to move between the inner side of the support base 2 and the outer side of the support base 2 so as to abut against the side wall of the sealing ring 5 and position it. Preferably, the drive unit includes a lead screw 301 and a control end 302. The lead screw 301 is disposed on the mounting base 3 and is connected to the lateral abutment part. One end of the lead screw 301 passes through the first connecting part 308 or the second connecting part 309 and is connected to the control end 302. By rotating the control end 302, the lead screw 301 is controlled to rotate, thereby driving the lateral abutment part connected to the lead screw 301 to move along the axial direction of the lead screw 301. Specifically, in order to facilitate the operation of the control terminal 302, the control terminal 302 is located on the second connecting part 309 outside the support base 2. One end of the lead screw 301 is rotatably mounted on the first connecting part 308, and the other end of the lead screw 301 passes through the second connecting part 309 and is connected to the control terminal 302. Preferably, the control end 302 is provided with an internal hexagonal groove to cooperate with an internal hexagonal wrench for control, which can withstand greater torque and is not easy to slip off; Specifically, the lateral contact part includes a mating seat 304 and a contact plate 305. The mating seat 304 is provided with a through screw hole that is connected to the lead screw 301 so that when the lead screw 301 rotates, the mating seat 304 is driven to move along the axial direction of the lead screw 301. The contact plate 305 is used to abut against the sealing ring 5 and is detachably provided on the mating seat 304. Specifically, the abutment plate 305 is movably sleeved on the mating seat 304; a sleeve 306 is provided on the side of the abutment plate 305 away from the sealing ring 5; so that the sleeve 306 can be sleeved on the top of the mating seat 304 to achieve quick assembly and disassembly.

[0023] Specifically, on the side of the abutting plate 305 that abuts against the sealing ring 5, there are two protrusions along the axial direction of the sealing ring 5. The two protrusions abut against the side wall of the sealing ring 5 so as to abut against the side wall of the sealing ring 5 of different sizes or shapes, and the abutment is tighter by using line contact.

[0024] like Figure 8 As shown, in one embodiment, the clamping assembly further includes a locking member disposed on the clamping plate 4; after the top clamping member and the side clamping member stop the workpiece against the support base 2, the locking member is connected to the mating seat 304 so that the clamping plate 4 clamps the workpiece on the support base 2. Specifically, since the mating seat 304 moves along the axial direction of the lead screw 301, the locking component needs to move accordingly for mating connection; the locking component includes a slider 404 and a mating block 403; the clamping plate 4 is provided with a slide groove 402, and the slider 404 is slidably disposed in the slide groove 402; the mating block 403 is rotatably connected to the slider 404; the mating block 403 is provided with a mating hole 407; the mating seat 304 is provided with a mounting hole 307; when the locking component is connected to the mating seat 304, the mating hole 407 of the mating block 403 and the mounting hole 307 of the mating seat 304 are coaxial and connected by a connector 405; the connector 405 provides a force along the axial direction of the mating hole 407, forcing the top clamping component to press against the workpiece against the support seat 2; Preferably, the clamping plate 4 is provided with a through groove 401 to provide sliding space for the movement of the slider 404; the two side walls of the through groove 401 are provided with sliding grooves 402 to provide a track for the movement of the slider 404; the slider 404 slides in the sliding grooves 402; the mating block 403 is placed in the through groove 401, and its two sides are respectively rotatably connected to the slider 404 in the two side sliding grooves 402; through the above structure, the mating block 403 can move along the sliding grooves 402 and can rotate around the rotatable connection between the mating block 403 and the slider 404; After the mating seat 304 slides along the axis of the lead screw 301, the clamping plate 4 is rotated so that one end abuts against the workpiece. Then, the mating block 403 is controlled to rotate and slide in the through groove 401, so that the mating hole 407 on the mating block 403 is coaxially aligned with the mounting hole 307 on the mating seat 304. Then, the connecting piece 405 passes through the mating hole 407 and is connected to the mounting hole 307 for fixation. The connecting piece 405 is preferably a bolt, and the mounting hole 307 is provided with a thread that mates with the bolt. When the connecting piece 405 is mated and connected to the mounting hole 307, the bolt head abuts against the mating block 403. As the bolt continues to rotate, the bolt moves toward the mating seat 304 along its axis, giving the mating block 403 a force toward the mating seat 304, forcing the clamping plate 4 to rotate toward the workpiece around the rotation axis 409, and finally pressing one end of the clamping plate 4 against the workpiece.

[0025] like Figure 4 As shown, in one embodiment, the support base 2 is disposed on the clamp base 1 by a plurality of pillars 201, and an active space is formed between any two adjacent pillars 201 for the drive unit and the mating seat 304 to pass through; Specifically, the support 2 needs to provide support when the sealing ring 5 is in a constrained state or a free state, and it needs to be adaptable to sealing rings 5 ​​of different sizes. Therefore, the annular support 2 needs to be able to change its diameter. The support base 2 is composed of several support plates surrounding it, and the column 201 is slidably mounted on the clamp base 1; preferably, the clamp base 1 is provided with several adjustment grooves 101 corresponding to several support plates; the several adjustment grooves 101 are all arranged along the axis of the lead screw 301; the bottom of the column 201 is provided with an adjustment block that cooperates with the adjustment groove 101, and the adjustment block can slide along the adjustment groove 101 to restrict the column 201 from moving along the adjustment groove 101; When the diameter of the support base 2 needs to be changed, the support column 201 is driven to slide along the adjustment groove 101, thereby driving several support plates to move to adapt to the sealing rings 5 ​​of different shapes.

[0026] This application discloses a processing technology for an open elastic sealing ring, including the following steps: Step 1. Roughly machine the inner hole and outer circle of the ring forging material, leaving allowance for each; Step 2. Cut the material into a ring-shaped sheet, leaving a margin on both ends of the ring-shaped sheet; Preferably, wire cutting is used for cutting and blanking to reduce the phenomenon of severe end face deformation when slicing on a lathe; Step 3. Grind the two end faces of the annular sheet; use a surface grinder for fine grinding; since the ring forging material is GH4145, the magnetic platform of the grinder cannot hold it magnetically, so a vacuum chuck fixture is used to fix the annular sheet. Specifically, the vacuum suction cup fixture includes a suction cup base, an air passage, sealing rings, a vacuum pump, and a pump tube interface; there are two sealing rings, concentrically arranged on the suction cup base; the air passage is located inside the suction cup base, one end of which is connected to the pump tube of the vacuum pump through the pump tube interface, and the other end is open between the two sealing rings; during processing, the annular sheet tightly covers the two sealing rings on the suction cup base, and the air between the annular sheet and the two sealing rings is discharged by the vacuum pump, so that the annular sheet is fixed on the suction cup base; Step 4. Place the annular sheet on the fixture, clamp it, and machine an opening. Machine overlapping structures 501 at both ends of the opening. The overlapping structures 501 are as follows: Figure 9 As shown; because an opening needs to be processed and the annular sheet is in a free state at this time, therefore, as Figure 1 , 2 As shown in Figures 7 and 8, adjust the fixture to the specified state; Specifically, the control column 201 slides along the adjustment groove 101 away from the center of the clamp base 1, thereby moving the surrounding support plates. Then, the annular sheet is placed on several support plates. The clamping plate 4 is rotatably connected to the rotating hole 303 of the second connecting part 309 via the rotating shaft 409. Then, the control end 302 is operated by an Allen wrench to drive the lead screw 301 to rotate, thereby controlling the mating seat 304 to move to the outside of the support plate, so that the mating hole 407 on the mating block 403 corresponds coaxially with the mounting hole 307 on the mating seat 304. Then, bolts are passed through the mating hole 407 and connected to the mounting hole 307 for fixation, fixing the annular sheet to the support plate. Then, an opening is milled into the annular sheet in the gap between adjacent support plates. Specifically, at the area to be processed, both the support base 2 and the mating base 304 are moved to the inside of the fixture base 1 to leave processing space for the opening. Then, the opening is milled on the annular sheet in the gap between the adjacent support plates at that location. Specifically, during the processing of the overlapping structure 501, after processing one end of the annular sheet, the clamping of the clamping plate 4 is released, and then the annular sheet is rotated 180° and placed on the support plate, and clamped by the clamping plate 4. After processing the other end of the annular sheet, the processing of the overlapping structure 501 is completed. Step 5. Adjust the fixture to ensure the two ends of the annular sheet overlap by a certain distance, and determine the machining centers for the outer circle and inner hole based on the overlap. At this stage, the annular sheet needs to be in a constrained state. Therefore, as follows... Figure 3 and 4 As shown, adjust the fixture to the specified position; Specifically, the determination of the machining center of the sealing ring during processing, and the dimensions of the sealing ring in the final product, such as... Figure 10 As shown, the diameter of the outer circle is α mm, the diameter of the inner hole is β mm, the overlap distance between the two ends of the annular sheet is γ mm, and the distance between the overlap and the machining center is Δ mm. Specifically, when the two ends of the annular sheet overlap, the distance between the inner side of the milled surface of one end and the outer side of the milled surface of the other end is γmm; the distance between one edge of the overlap and the machining center is Δmm. The middle part of the fixture base 1 is provided with a positioning seat for cooperating with the lathe center, which is used for positioning the fixture base 1 at the machining center, so that when the lathe is machining, the lathe fixture fixes the fixture base 1, and the rotation center axis is determined by the center and the positioning seat, so that the fixture base 1 rotates around the positioning seat axis for machining. Specifically, during operation, first release the fixation between the clamping plate 4 and the mating seat 304, then drive the lead screw 301 to rotate, control the movement of the peripheral mating seat 304, and then drive the support plate to slide along the adjustment groove 101 toward the center of the fixture base 1; finally, the annular sheet is in a constrained state, and the peripheral mating seats 304 move the same distance, so that the annular sheet is in a circular state, and when the two ends overlap, the distance is adjusted to γmm, and the distance Δmm from the end overlap to the center of the fixture base 1 is the machining coordinate 0 point, and the machining coordinate 0 point coincides with the center of the fixture base 1; Step 6. Use a lathe to precision machine the inner hole and outer circle of the annular sheet to the final size, thus forming the open elastic sealing ring; Figure 3 and 4 As shown, when processing the inner side of the annular sheet, the clamping plate 4 is located on the outer side of the annular sheet to clamp it, and the abutment plate 305 abuts against the outer side of the annular sheet; a processing space is left on the inner side of the annular sheet, and then the inner hole of the annular sheet is precision machined by a lathe, ensuring that the diameter of the inner hole is βmm. like Figure 5 and 6 As shown, when processing the outer side of the annular sheet, the clamping plate 4 is first removed from the second connecting part 309 and then installed on the first connecting part 308. Then, the abutment plate 305 is removed from the mating seat 304 in sequence. Then, the mating seat 304 is moved to the inner side of the annular sheet. Then, the abutment plate 305 is installed and driven to move the mating seat 304 so that the abutment plate 305 in the changed position abuts against the inner side of the annular sheet. The above process is repeated to change the positions of the clamping plate 4 and the abutment plate 305 in sequence. Finally, a processing space is left on the outer side of the annular sheet. Then, the outer circle of the annular sheet is precision machined by a lathe to ensure that the outer circle diameter is α mm. Finally, the open elastic sealing ring is formed. Step 7. Light transmittance inspection: Install the sealing ring 5 into the inspection hole used for inspection. The diameter of the inspection hole is α-0.05mm, the light transmittance in the circumferential direction does not exceed 40%, and the circumferential gap is ≤0.05mm. The inspection is qualified.

[0027] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0028] Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0029] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A fixture for an open elastic sealing ring, characterized in that, include: Support base, mounted on the fixture base; A mounting base is disposed on the fixture base; One end of the mounting base extends to the inner side of the support base, and the other end extends to the outer side of the support base; the mounting base includes a first connecting part and a second connecting part, the first connecting part being located inside the support base and the second connecting part being located outside the support base; A clamping assembly is disposed on the mounting base; the clamping assembly is used to clamp a workpiece on the support base; the clamping assembly includes a lateral clamping member and a top clamping member; the lateral clamping member is movable between the inner side and the outer side of the support base and is used to abut against the side wall of the workpiece; the top clamping member is detachably connected to the first connecting portion and the second connecting portion respectively; and is used to abut against the top of the workpiece; The support base is mounted on the clamp base by multiple pillars, and an active space for the mating seat to pass through is formed between any two adjacent pillars; the support base is composed of several support plates surrounding it, and the pillars are slidably mounted on the clamp base. The lateral clamping member includes a driving part and a lateral abutment part. The driving part is disposed on the mounting base and connected to the lateral abutment part to drive the lateral abutment part to abut against the workpiece. The drive unit includes a lead screw and a control end. The lead screw is disposed on the mounting base and is connected to the lateral abutment part. One end of the lead screw passes through the first connecting part or the second connecting part and is connected to the control end. The lateral contact portion includes a mating seat and a contact plate. The mating seat is connected to the driving portion, and the contact plate is used to contact the workpiece and is detachably mounted on the mating seat. The top clamping member includes a clamping plate and a rotating shaft. The clamping plate is rotatably connected to the first connecting part or the second connecting part via the rotating shaft, and the rotating shaft can be separated from the first connecting part and the second connecting part. The clamping assembly further includes a locking member disposed on the clamping plate; After the top clamping member and the side clamping member stop the workpiece against the support base, the locking member connects with the mating base so that the clamping plate clamps the workpiece. The locking component includes a slider and a mating block; the clamping plate is provided with a sliding groove, and the slider is slidably disposed in the sliding groove; the mating block is rotatably connected to the slider; the mating block is provided with a mating hole; the mating seat is provided with a mating hole; When the locking member is connected to the mating seat, the mating hole of the mating block and the mating hole of the mating seat are coaxial and connected by a connector; the connector applies a force along the axial direction of the mating hole, forcing the top clamping member to press against the workpiece against the support seat.

2. The fixture for an open elastic sealing ring according to claim 1, characterized in that, The abutment plate is movably sleeved on the mating seat; The clamping plate is rotatably connected to a movable pressure plate at one end corresponding to the workpiece.

3. A processing method for an open elastic sealing ring, based on the fixture for the open elastic sealing ring according to any one of claims 1-2, characterized in that, Includes the following steps: Step 1. Roughly machine the inner hole and outer circle of the ring forging material, leaving allowance for each; Step 2. Cut the material into a ring-shaped sheet, leaving a margin on both ends of the ring-shaped sheet; Step 3. Finely grind the end faces of the annular sheet; Step 4. Place the annular sheet on the fixture, clamp it, and machine an opening. Machine overlapping structures at the ends on both sides of the opening. Step 5. Adjust the fixture to make the two ends of the annular sheet overlap to a certain distance, and determine the machining center of the outer circle and the inner hole based on the end overlap; Step 6. Precision machine the inner hole and outer circle of the annular sheet to the final size, and form the open elastic sealing ring.

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