Machining device for sealing ring

Abstract

The utility model relates to a machining device for a sealing ring, which comprises a base, a plurality of clamping blocks and a plurality of clamping blocks, the axial pressing assembly comprises a plurality of pressing blocks located on the circumference of the boss, and the pressing blocks are arranged in the mode that fixing bolts of the pressing blocks penetrate through the boss and the base. And the machining workpiece is arranged on the periphery of the boss in a sleeving manner. The interior of the boss is hollow, and a radial fastening assembly used for fastening the machined workpiece in the radial direction is arranged. In the using process, the boss can be sleeved with a machined workpiece, and the radial fastening assembly extends out of the boss to be tightly attached to the inner wall of the machined workpiece. Therefore, the machining device can ensure that the circle center of the machined workpiece and the machine tool spindle are coaxial, and errors caused by eccentricity in the machining process are avoided. Radial positioning is carried out through a single working procedure, parallelism accumulative errors caused by repeated positioning of multiple working procedures are avoided, and the problem that uniform distribution of outer circular grooves machined by the sealing ring cannot be guaranteed due to machining shaking of a machine tool is solved.

Description

Technical Field

[0001] This utility model relates to the field of sealing ring processing, and in particular to a processing device for sealing rings. Background Technology

[0002] In the field of machining, sealing rings, as an important component, are widely used in various industrial equipment to prevent liquid or gas leakage and ensure the normal operation and safety of the equipment. The machining accuracy and quality of sealing rings have a crucial impact on the sealing performance of the equipment. Traditional sealing ring machining equipment has many problems in practical applications, mainly in the following aspects:

[0003] Insufficient positioning accuracy: Traditional machining equipment struggles to ensure the coaxiality of the sealing ring's center with the machine tool spindle during clamping and machining. This leads to eccentricity during processing, resulting in uneven distribution of parts such as the outer cylindrical groove. Consequently, accuracy indicators such as perpendicularity and parallelism also fail to meet high requirements, affecting the final quality of the sealing ring.

[0004] Low clamping and changeover efficiency: The clamping process of traditional equipment is relatively complicated and takes a long time. In addition, the adjustment time is also long when changing to different specifications of sealing rings for processing. This greatly reduces production efficiency and makes it difficult to meet the needs of large-scale production.

[0005] Poor processing stability: Due to the unreasonable structural design of the device, vibration is easily generated during the processing, especially when processing parts such as outer circular grooves. Vibration will make the contact between the tool and the sealing ring unstable, resulting in uneven roughness of the groove wall and even large processing errors, which increases the scrap rate.

[0006] Cumulative error problem: Traditional processing equipment requires multiple process positioning during processing. Each positioning may produce a certain error. These errors will gradually accumulate, eventually leading to excessive deviation in the size of the processed sealing ring, which cannot meet the design requirements and seriously affects the quality and reliability of the product.

[0007] In summary, traditional sealing ring machining devices have significant shortcomings in terms of machining accuracy, efficiency, stability, and tool wear, making it difficult to meet the high precision, high efficiency, and high quality requirements of modern industrial production for sealing ring machining. Therefore, a new type of sealing ring machining device is needed to effectively solve these problems, thereby improving the machining quality and production efficiency of sealing rings and reducing production costs.

[0008] Furthermore, on the one hand, there are differences in understanding among those skilled in the art; on the other hand, the applicant studied a large number of documents and patents when making this utility model, but due to space limitations, not all details and contents were listed in detail. However, this does not mean that this utility model does not have the features of these prior art. On the contrary, this utility model has all the features of the prior art, and the applicant reserves the right to add relevant prior art to the background art. Utility Model Content

[0009] To address the shortcomings of existing technologies, this utility model provides a processing device for sealing rings, comprising: a base with a boss arranged axially; an axial clamping assembly including several clamping blocks located on the circumference of the boss, wherein the clamping blocks are arranged such that their fixing bolts pass through the boss and the base; and a processing workpiece fitted around the outer circumference of the boss. The boss is hollow inside and is provided with a radial clamping assembly for radially clamping the processing workpiece.

[0010] According to a preferred embodiment, the circumferential surface of the boss is provided with at least three fastening holes, and a radial fastening assembly is used to pass through the fastening holes to position the workpiece relative to the base and the boss.

[0011] According to a preferred embodiment, at least three fastening holes are arranged in a triangular pattern on the same plane, and the axis of the fastening holes is perpendicular to the axis of the boss.

[0012] According to a preferred embodiment, a clamping portion is further provided on the side of the base away from the boss. The clamping portion has an axially extending space for accommodating a radially fastening assembly. The internal space of the clamping portion communicates with the internal hollow space of the boss through the base.

[0013] According to a preferred embodiment, the radial fastening assembly includes: a rotating wheel disposed inside the hollow part of the boss and not in contact with the inner wall of the boss; an eccentric groove located on the rotating wheel; and a fastening member disposed in the eccentric groove and located inside the fastening hole facing the outside of the boss.

[0014] According to a preferred embodiment, the fastening members are arranged to extend along the fastening holes. The fastening holes are symmetrical about the axis of the boss. The fastening members are symmetrical about the axis of the boss.

[0015] According to a preferred embodiment, the radial fastening assembly further includes a central shaft fixedly connected to the center of the rotating wheel and passing through the boss, the base, and the clamping portion. A torsion spring is provided between the central shaft and the end of the base away from the boss.

[0016] According to a preferred embodiment, the central shaft passes through the end of the clamping part away from the base, and the central shaft and the clamping part are fixedly connected by bolts.

[0017] According to a preferred embodiment, both the boss and the base are provided with through holes for receiving fixing bolts. A plurality of through holes are arranged around the circumferential edges of the boss and the base. The through holes on the boss and the through holes on the base correspond one-to-one.

[0018] According to a preferred embodiment, the contact surface of the pressure block near the workpiece is rounded. Attached Figure Description

[0019] Figure 1 This is a simplified structural schematic diagram of a processing device for sealing rings according to a preferred embodiment of the present invention;

[0020] Figure 2 This is an exploded structural diagram of a processing device for sealing rings according to a preferred embodiment of the present invention;

[0021] Figure 3 This is a side view of the processing device for sealing rings according to a preferred embodiment of the present invention, showing the workpiece after being clamped and processed.

[0022] List of reference numerals

[0023] 1: Base; 2: Boss; 3: Pressure block; 4: Fixing bolt; 5: Workpiece being machined; 6: Radial fastening assembly; 7: Fastening hole; 8: Clamping part; 9: Rotary wheel; 10: Eccentric groove; 11: Fastening component; 12: Torsion spring; 13: Through hole; 14: Central shaft. Detailed Implementation

[0024] The following is a detailed explanation with reference to the accompanying drawings.

[0025] Example 1

[0026] This utility model provides a processing device for sealing rings, such as... Figure 1As shown, the device includes: a base 1 with a boss 2 axially arranged thereon; an axial clamping assembly comprising several clamping blocks 3 located on the circumference of the boss 2, wherein the clamping blocks 3 are arranged such that their fixing bolts 4 pass through the boss 2 and the base 1; and a workpiece 5, which is fitted onto the outer circumference of the boss 2. The boss 2 is hollow inside and is provided with a radial clamping assembly 6 for radially clamping the workpiece 5. The radial clamping assembly 6 is used for centering the workpiece 5. In use, the workpiece 5 (i.e., the sealing ring) can be fitted onto the boss 2, and the radial clamping assembly 6 extends from the boss 2 to fit tightly against the inner wall of the workpiece 5. Thus, this processing device can ensure that the center of the workpiece 5 is coaxial with the center of the boss 2 and the base 1 (i.e., the machine tool spindle), avoiding errors caused by eccentricity during processing. Moreover, the radial clamping assembly 6 can also reduce vibration fluctuations during radial processing of the sealing ring, improve the stability of the sealing ring clamping, and improve the perpendicularity of the groove wall when processing the outer circular groove of the sealing ring. This invention achieves radial and axial positioning through a single process, avoiding cumulative parallelism errors caused by repeated positioning in multiple processes. It solves problems such as the inability to ensure uniform distribution of the outer circular groove of the sealing ring due to machine tool vibration caused by the large outer ring, excessive deviations in perpendicularity and roughness, excessive processing time, excessive difficulty, and low quality.

[0027] This invention effectively improves the processing efficiency of sealing rings, reducing clamping time from 5 minutes to 2 minutes, changeover adjustment to only 45 seconds, and processing time from 36 minutes to 28 minutes, resulting in a 22% increase in efficiency. Through optimized tooling design, this device reduces the scrap rate from 10% to 4%, a 60% reduction. Furthermore, by improving perpendicularity control from 0.1mm to 0.02mm-0.04mm and parallelism pass rate from 78% to 95.3%, this invention further enhances the processing accuracy of sealing rings. Finally, this invention reduces tool wear by 30%, decreasing tool replacement frequency and maintenance costs, and extending tool life.

[0028] According to a preferred embodiment, the circumferential surface of the boss 2 is provided with at least three fastening holes 7, and the radial fastening assembly 6 is used to pass through the fastening holes 7 to position the workpiece 5 relative to the base 1 and the boss 2. Preferably, the boss 2 is a cylindrical boss 2. The inner diameter of the boss 2 can be tightly fitted with the inner hole of the workpiece 5 or is smaller than the inner hole of the workpiece 5. The boss 2 combined with the radial fastening assembly 6 can ensure that the center of the workpiece 5 is coaxial with the machine tool, avoiding errors caused by eccentricity during processing.

[0029] According to a preferred embodiment, at least three fastening holes 7 are arranged in a triangular pattern on the same plane, and the axes of the fastening holes 7 are perpendicular to the axis of the boss 2. The fastening holes 7 are arranged on the horizontal plane of the boss 2. The radial fastening assembly 6 extends out from the fastening holes 7 and pushes against the inner wall of the workpiece 5, centering it on the boss 2. Thus, this invention improves the machining accuracy and positioning accuracy of the sealing ring by contacting the inner wall of the workpiece 5.

[0030] According to a preferred embodiment, a clamping portion 8 is also provided on the side of the base 1 away from the boss 2. The clamping portion 8 has a space through which it accommodates the radial fastening assembly 6. The internal space of the clamping portion 8 communicates with the internal hollow space of the boss 2 through the base 1. The base 1, the boss 2, and the clamping portion 8 all have spaces in their axial directions for accommodating the radial fastening assembly 6, thereby facilitating coaxial fixation of the three.

[0031] According to a preferred embodiment, the radial fastening assembly 6 includes: a rotating wheel 9, hollow inside the boss 2 and not in contact with the inner wall of the boss 2; an eccentric groove 10 located on the rotating wheel 9; and a fastening member 11 disposed in the eccentric groove 10 and located inside the fastening hole 7 facing outwards from the boss 2. The rotating wheel 9 and the boss 2 are coaxially arranged to form concentric circles. The rotating wheel 9 does not directly contact the inner wall of the boss 2. Preferably, the fastening member 11 is disposed within the fastening hole 7. The fastening hole 7 is used to restrict the movement of the fastening member 11, allowing the fastening member 11 to move only along the direction in which the fastening hole 7 is located. Preferably, the end of the fastening member 11 away from the fastening hole 7 is disposed inside the eccentric groove 10. The eccentric groove 10 is a smooth strip-shaped groove on the rotating wheel 9 with different distances from the center of the rotating wheel 9. One end of the fastener 11 can move within the eccentric groove 10, causing the distance between the fastener 11 and the center of the rotating wheel 9 to change linearly as the wheel 9 rotates. Thus, the fastener 11 can extend into or out of the fastening hole 7 under the rotation of the wheel 9, thereby abutting against the inner wall of the boss 2. More preferably, the fastening hole 7 can extend towards the center of the rotating wheel 9. Therefore, the fastening hole 7 can cover as much of the length of the fastener 11 as possible, fixing the rotating wheel 9 to the exact center of the boss 2 via the fastener 11, thus facilitating the centering of the workpiece 5 during subsequent machining.

[0032] According to a preferred embodiment, the fastening member 11 is arranged to extend along the fastening hole 7. A plurality of fastening holes 7 are symmetrical about the axis of the boss 2. A plurality of fastening members 11 are symmetrical about the axis of the boss 2. This symmetrical arrangement provides a certain degree of stability in fastening the workpiece 5, further reducing the vibration of the workpiece 5 when the outer circular groove is cut.

[0033] According to a preferred embodiment, the radial fastening assembly 6 further includes a central shaft 14 fixedly connected to the center of the rotating wheel 9 and passing through the boss 2, the base 1, and the clamping portion 8. A torsion spring 12 is disposed between the central shaft 14 and the end of the base 1 furthest from the boss 2. The base 1 has a space for accommodating the torsion spring 12. Preferably, one end of the torsion spring 12 is fixedly connected to the inner wall of the base 1, and the other end of the torsion spring 12 is fixedly connected to the central shaft 14. The torsion spring 12 is sleeved on the central shaft 14. Thus, the torsion spring 12 can drive the central shaft 14 and even the rotating wheel 9 to rotate, so that the fastening member 11 abuts against the inner diameter of the workpiece 5 through the fastening hole 7 as the rotating wheel 9 rotates.

[0034] According to a preferred embodiment, the central shaft 14 passes through the end of the clamping part 8 away from the base 1, and the central shaft 14 is fixedly connected to the clamping part 8 by bolts. The central shaft 14 passes sequentially through the boss 2, the base 1, and the clamping part 8 to extend to the outside. The extended end of the central shaft 14 is provided with threads for connection to the clamping part 8 by bolts. The threaded connection is also used to lock the rotation of the rotating wheel 9, preventing accidental movement during subsequent processing. More preferably, the rotation direction of the thread of the central shaft 14 can be the same as the direction of reduction of the eccentric distance of the eccentric groove 10. Thus, while fixing the central shaft 14 (i.e., the radial fastening assembly 6) by bolts, the fastening member 11 can also be made to fit as close as possible to the inner wall of the workpiece 5 to improve processing stability.

[0035] According to a preferred embodiment, both the boss 2 and the base 1 are provided with through holes 13 for receiving fixing bolts 4. A plurality of through holes 13 are arranged around the circumferential edges of the boss 2 and the base 1. The through holes 13 on the boss 2 and the through holes 13 on the base 1 correspond one-to-one. Preferably, at least eight through holes 13 are evenly distributed on the base 1. These through holes 13 can be threaded holes for installing pressure blocks 3, thereby ensuring that the workpiece 5 is subjected to uniform force during processing and avoiding deformation caused by uneven local force. The pressure block 3 is connected to the boss 2 and the base 1 by fixing bolts 4 to ensure that a uniform vertical force is applied to the sealing ring during the processing of the sealing ring, avoiding deformation of the sealing ring and ensuring processing quality. Preferably, the base 1 can be made of high-strength cast iron or aluminum alloy. High-strength cast iron has good wear resistance and deformation resistance, while aluminum alloy has the advantage of being lightweight and is suitable for tooling that requires frequent movement. Therefore, this device ensures that the base 1 provides sufficient rigid support during the machining of the sealing ring, effectively resisting vibrations and deformations generated during the machining process. In use, the base 1 is bolted to the indexing plate and clamped by the clamping part 8 to ensure a stable connection between the device and the machine tool.

[0036] According to a preferred embodiment, such as Figure 3As shown, the contact surface of the pressure block 3 near the workpiece 5 is rounded. It should be noted that, to better demonstrate the structural features of this utility model, Figure 3 The annular workpiece 5 shown in the diagram is only a cross-section to illustrate the state of the sealing ring being pressed down by the pressure block 3. The pressure block 3 is preferably 56 mm long, preferably 39 mm wide, and its contact surface thickness with the end face of the workpiece 5 is preferably 9.55 mm. Therefore, this device ensures that when clamping the workpiece 5, it only makes uniform contact with the annular end face of the workpiece 5 without damaging the edge of the annulus. Preferably, the pressure block 3 can be made of high-strength steel. The pressure block 3 can be heat-treated to ensure that it is not easily deformed or worn during long-term use, guaranteeing the stability and durability of the clamping force.

[0037] To illustrate the working principle of this utility model, the usage process of this device will now be described in detail.

[0038] Clamping process: The operator places the workpiece 5 (sealing ring) on ​​the base 1. The engagement of the boss 2, radial fastening assembly 6, and the inner hole of the sealing ring ensures that the center of the workpiece 5 is coaxial with the machine tool spindle. The workpiece is then secured to the clamping part 8 via the central shaft 14. The operator then uses the pressure block 3 and bolts to axially fix the workpiece 5 in place, ensuring that it will not shift or deform during processing.

[0039] Machining steps: Under the support of base 1 and the positioning of pressure block 3, the outer circular groove is machined. During machining, the feed rate and depth of cut of the tool can be adjusted according to the material of the sealing ring and the machining requirements to ensure machining efficiency and quality. This device can ensure the uniform distribution of the machined outer circular groove and avoid cumulative errors caused by repeated positioning. During machining, the perpendicularity, flatness, and roughness of the machined workpiece 5 are kept consistent to ensure machining accuracy.

[0040] Throughout the text, the features indicated by “preferred” are only optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete the relevant preferred features at any time.

[0041] It should be noted that the specific embodiments described above are exemplary. Those skilled in the art can devise various solutions inspired by the disclosure of this utility model, and these solutions all fall within the scope of this utility model and its protection. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and not intended to limit the scope of the claims. The protection scope of this utility model is defined by the claims and their equivalents.

Claims

1. A processing apparatus for sealing rings, characterized in that, include: The base (1) has a boss (2) arranged axially. The axial clamping assembly includes a plurality of clamping blocks (3) located on the circumference of the boss (2), and the clamping blocks (3) are arranged such that their fixing bolts (4) pass through the boss (2) and the base (1). The workpiece (5) is machined and fitted around the outer periphery of the boss (2); wherein, The boss (2) is hollow inside and is provided with a radial fastening assembly (6) for radially fastening the workpiece (5).

2. The processing apparatus for sealing rings according to claim 1, characterized in that, The circumferential surface of the boss (2) is provided with at least three fastening holes (7), and the radial fastening assembly (6) is used to pass through the fastening holes (7) to position the workpiece (5) relative to the base (1) and the boss (2).

3. The processing apparatus for sealing rings according to claim 2, characterized in that, On the same plane, at least three of the fastening holes (7) are arranged in a triangular pattern, and the axis of the fastening holes (7) is perpendicular to the axis of the boss (2).

4. The processing apparatus for a sealing ring according to claim 3, characterized in that, The base (1) is provided with a clamping part (8) on the side away from the boss (2), and the clamping part (8) is provided with a space through which the radial fastening assembly (6) is accommodated in the axial direction. The internal space of the clamping part (8) and the internal hollow space of the boss (2) are connected through the base (1).

5. The processing apparatus for a sealing ring according to claim 4, characterized in that, The radial fastening assembly (6) includes: The rotating wheel (9) is hollow inside the boss (2) and does not contact the inner wall of the boss (2). An eccentric groove (10) is located on the rotating wheel (9). The fastener (11) is disposed in the eccentric groove (10) and is located inside the fastening hole (7) toward the outside of the boss (2).

6. The processing apparatus for a sealing ring according to claim 5, characterized in that, The fastening member (11) is provided to extend along the fastening hole (7), wherein, Several of the fastening holes (7) are symmetrical about the axis of the boss (2). Several of the fasteners (11) are symmetrical about the axis of the boss (2).

7. The processing apparatus for a sealing ring according to claim 6, characterized in that, The radial fastening assembly (6) further includes a central axis (14) fixedly connected to the center of the rotating wheel (9) and passing through the boss (2), the base (1), and the clamping part (8), wherein, A torsion spring (12) is provided between the central shaft (14) and the end of the base (1) away from the boss (2).

8. The processing apparatus for a sealing ring according to claim 7, characterized in that, The central shaft (14) passes through the end of the clamping part (8) away from the base (1), and the central shaft (14) and the clamping part (8) are fixedly connected by bolts.

9. The processing apparatus for a sealing ring according to claim 8, characterized in that, Both the boss (2) and the base (1) are provided with through holes (13) for accommodating the fixing bolts (4), wherein, Several of the perforations (13) are arranged around the circumferential edges of the boss (2) and the base (1). The perforations (13) on the boss (2) and the perforations (13) on the base (1) are in one-to-one correspondence.

10. The processing apparatus for a sealing ring according to claim 9, characterized in that, The contact surface of the pressure block (3) near the workpiece (5) is rounded.

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