CN115815982A - Machining method of large high-precision elastic check ring - Google Patents

Abstract

The invention discloses a processing method of a large high-precision elastic check ring, which comprises an annular tool for clamping the elastic check ring, wherein the annular tool comprises an annular base, a middle annular groove arranged in the middle of the upper surface of the annular base, a plurality of outer arc-shaped grooves which are uniformly arranged on the upper surface of the annular base and positioned on the outer side of the middle groove at intervals along the circumferential direction, a plurality of inner arc-shaped grooves which are uniformly arranged on the upper surface of the annular base and positioned on the inner side of the middle groove at intervals along the circumferential direction, inner arc-shaped blocks matched with each inner arc-shaped groove and outer arc-shaped blocks matched with each outer arc-shaped groove, and the number of the outer arc-shaped grooves and the number of the inner arc-shaped grooves are the same and are arranged in a one-to-one correspondence manner; the annular tool is adopted to process and clamp the large elastic check ring in the thickness and diameter directions, so that the large elastic check ring is prevented from deforming during processing of an inner hole, an outer circle and an opening; the problem of large-scale circlip because of the unable clamping of adsorbing that low magnetism or no magnetism lead to is solved.

Description

A processing method for a large-scale high-precision elastic retaining ring

technical field

The invention belongs to the technical field of mechanical processing, and in particular relates to a processing method for a large-scale high-precision elastic retaining ring.

Background technique

At present, the utilization rate of large-scale high-precision retaining rings is gradually increasing in some marine equipment. The requirements of long life and corrosion resistance make these large-scale retaining rings usually use non-ferrous metal forgings. Different from the commonly used small circlips with unequal widths in the diameter direction, large circlips are usually split rings with equal width in the diameter direction, which not only have high requirements on the size of the inner hole and outer circle, but also have higher requirements on the accuracy of the axial thickness. The thickness tolerance is required to reach 0~0.03mm, the roughness is required to reach Ra0.8, and surface grinding is required. Grinders generally use adsorption clamping or modified claw clamping when surface grinding, and the diameter of the clamped workpiece is limited. Because the material is non-ferrous metal forgings, large circlips are usually made of non-magnetic or low-magnetic materials, and the grinding machine cannot be clamped. The overall diameter of large circlips reaches 1000-2000mm, the width is less than 20mm, and the thickness is less than 10mm. Thickness and easy deformation make it impossible to use a grinder for clamping jaws of large elastic retaining rings. Therefore, it is basically impossible to grind large circlips using a grinding machine.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned technical problems and provide a high-precision processing method that avoids deformation of large elastic retaining rings during processing.

In order to achieve the above purpose, the present invention provides a processing method for a large-scale high-precision circlip, the processing method includes an annular tool for clamping the circlip, the annular tool includes an annular base, and is set in the middle of the upper surface of the annular base The middle annular groove at the center, on the upper surface of the annular base and on the outside of the middle groove, there are a plurality of outer arc-shaped grooves evenly spaced along the circumferential direction, on the upper surface of the annular base and on the inner side of the middle groove, spaced along the circumferential direction A plurality of inner arc-shaped grooves are evenly opened, an inner arc-shaped block matching each inner arc-shaped groove and an outer arc-shaped block matching each outer arc-shaped groove, and the outer arc-shaped groove and the middle annular groove connected, the inner arc-shaped groove is connected with the middle annular groove; the number of the outer arc-shaped groove and the inner arc-shaped groove is the same and arranged in a one-to-one correspondence;

On the outer edge of the annular base and at each outer annular groove position are provided with at least two radially outer bolt holes matching the outer adjusting bolts, on the inner wall of the annular base and at each inner annular groove position are provided with There are at least two radially inner bolt holes matched with the inner adjusting bolts, and the radially inner bolt holes communicate with the inner annular groove, and the radially outer bolt holes communicate with the outer annular groove; A notch is processed between the two outer annular grooves.

Further, the depth of the outer arc-shaped groove is greater than the depth of the middle annular groove, and the depth of the inner arc-shaped groove is greater than the depth of the middle annular groove.

Further, the height of the inner arc-shaped block and the outer arc-shaped block does not exceed the groove depth of the inner annular groove and the outer annular groove.

Further, a plurality of lugs are welded on the outer surface of the annular base.

Further, the processing method is specifically:

1) After the rough machining of the elastic retaining ring, place it in the middle annular groove of the annular tooling; place the inner arc-shaped block in the inner annular groove, and the outer arc-shaped block in the outer annular groove; place the outer arc-shaped block in the outer annular groove; Copper gaskets are lined with the elastic circlip and between the inner arc-shaped block and the elastic circlip; the inner arc-shaped block and the outer arc-shaped block clamp the elastic circlip through the outer adjusting bolt and the inner adjusting bolt, and use The nut locks the adjusting bolt;

2) Hoist and fix the tooling on the platform of the CNC boring and milling machine, and then perform finishing in the thickness direction of the elastic retaining ring. During the processing process, the gap can be used to detect whether the thickness and dimension of the elastic retaining ring are finished in place;

3) After finishing the thickness of the retaining ring, take out the outer arc-shaped block and the corresponding copper gasket, adjust the inner arc-shaped block, and after the center of the retaining ring is aligned, on the upper surface of the retaining ring and in each group An inner pressure plate is placed at the position between the inner arc groove and the notch, and a copper gasket is lined between the inner pressure block and the circlip. The outer circular surface of the retaining ring is processed in place;

Put in the outer arc block and the corresponding copper gasket, take out the inner arc block and the corresponding copper gasket, adjust the outer arc block, and after the center of the elastic retaining ring is aligned, it will be on the upper surface of the elastic retaining ring and located at An outer pressure plate is placed between each group of outer arc-shaped grooves and notches, and a copper gasket is lined between the outer pressure plate and the elastic circlip, and the outer pressure plate is pressed against the elastic circlip by the compression bolt. The inner wall of the elastic retaining ring is processed in place;

4) Choose a gap, place the inner arc-shaped block, the outer arc-shaped block and the copper gasket in the inner arc-shaped groove and outer arc-shaped groove on both sides of the gap, and press the inner and outer pressure plates at the same time to make the elastic The opening of the retaining ring is processed in place, and the drilling completes the processing of the elastic retaining ring.

Further, in the step 1), the thickness of the circlip is greater than the depth of the middle annular groove.

Further, in the step 1), knock the upper end surface of the circlip so that the lower end surface of the circlip fits the bottom plane of the middle annular groove; observe the lower end surface of the circlip and the bottom plane of the middle annular groove through the gap Achieve fit.

Compared with the prior art, the advantage of the present invention is that the present invention adopts the annular tooling to clamp the large circlip in the thickness and diameter directions, which not only solves the problem that the large circlip cannot be adsorbed due to low or no magnetism. It also solves the problem of easy deformation of clamping caused by large diameter, small thickness and width, avoids deformation of large elastic retaining rings during inner hole, outer circle and opening processing, and realizes precision machining of large elastic retaining rings .

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of the structure of the ring base;

Fig. 3 is the A-A direction sectional view of Fig. 2;

Fig. 4 is the B-B direction sectional view of Fig. 2;

Figure 5 is a clamping diagram of the outer circle of the elastic retaining ring;

Figure 6 is a clamping diagram of the inner hole of the circlip;

Fig. 7 is a schematic diagram of an inner arc block;

Fig. 8 is a schematic diagram of an outer arc block;

FIG. 9 is an enlarged view of M in FIG. 1 .

Among them, the ring base 1, the inner arc block 2, the elastic retaining ring 3, the outer arc block 4, the nut 5, the inner adjusting bolt 6, the copper gasket 7, the inner pressing plate 8, the outer pressing plate 9, the pressing bolt 10, the middle Annular groove 11, outer adjusting bolt 12, inner arc groove 13, outer arc groove 14, notch 15, ear seat 16.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1, 2, and 3, the annular tooling includes an annular base 1, an intermediate annular groove 11 located at the middle position on the upper surface of the annular base 1, and an annular groove 11 located on the upper surface of the annular base 1 and outside the intermediate groove 11 along the circumferential direction. A plurality of outer arc-shaped grooves 14 are evenly spaced, and a plurality of inner arc-shaped grooves 13 are evenly spaced along the circumferential direction on the upper surface of the annular base 1 and located inside the middle groove 11. 13 matched inner arc-shaped block 2 and outer arc-shaped block 4 matched with each outer arc-shaped groove 14, the depth of the outer arc-shaped groove 14 is greater than the depth of the middle annular groove 11 and is connected with the middle annular groove 11 In the same way, the depth of the inner arc groove 13 is greater than the depth of the middle annular groove 11 and communicates with the middle annular groove 11; the number of the outer arc groove 14 is the same as that of the inner arc groove 13 and is a one-to-one correspondence Arrangement, the heights of the inner arc-shaped block 2 and the outer arc-shaped block 4 are no more than the groove depths of the inner annular groove 13 and the outer annular groove 14 (see Fig. 3 ).

On the outer edge of the annular base 1 and at the position of each outer annular groove 14, there are at least two radially outer bolt holes matched with the outer adjusting bolts 12. Similarly, on the inner wall of the annular base 1 and located at each inner The positions of the annular grooves 13 are provided with at least two radially inner bolt holes matched with the inner adjusting bolts 6, and the radially inner bolt holes communicate with the inner annular groove, and the radially outer bolt holes communicate with the outer annular groove.

On the outer surface of the annular base 1 and between every two outer annular grooves 14, a gap 15 is processed. At the same time, a plurality of lugs 16 are welded on the outer surface of the annular base 1. The gap 15 is convenient for observing the elastic retaining ring 3 and The fit of the outer annular groove and the measurement of the thickness of the retaining ring, the lug 16 is convenient for carrying out the lifting and transfer of the retaining ring 3 with the tooling as a whole after clamping, and the clamping and fixing on the machine tool (see Figures 2 and 4).

The processing method of the large-scale high-precision retaining ring of the present invention is specifically as follows:

1) After the rough machining of the circlip 3 is completed, it is placed in the middle annular groove 11 of the annular tooling. The thickness of the circlip 3 is greater than the groove depth of the middle annular groove 11, and the bottom plane of the middle annular groove 11 is used as the elastic stop Thickness supporting surface and positioning surface of ring 3 finishing; place inner arc block 2 in inner annular groove (see figure 7), outer arc block 4 in outer annular groove (see figure 8), inner arc block The shaped block and the outer arc-shaped block are used as the support for the clamping of the elastic retaining ring. The arc-shaped block can increase the contact surface with the elastic retaining ring to avoid deformation when the inner and outer circular surfaces are clamped when processing the end face of the elastic retaining ring, and solve the problem of elastic retaining ring The problem of poor overall rigidity (see Figures 2 and 3); between the outer arc block and the circlip, and between the inner arc block and the circlip are lined with copper gaskets 7 to avoid arcing when clamping. The hardness of the block is too high, resulting in local pinching of the elastic retaining ring;

During the clamping process, lightly tap the upper end surface of the circlip 3 with a tool such as a rubber hammer, so that the lower end surface of the circlip 3 fits with the bottom plane of the middle annular groove; observe the lower end surface of the circlip 3 and the After the bottom plane of the middle annular groove is fitted, adjust the outer adjusting bolt 12 and the inner adjusting bolt 6 so that the inner arc-shaped block 2 and the outer arc-shaped block 4 clamp the elastic ring 3, and lock the adjusting bolt with the nut 5 to prevent loosening ; (see Figure 3)

2) Hoist and fix the tooling on the platform of the CNC boring and milling machine, and then perform finishing in the thickness direction of the elastic retaining ring 3. During the processing process, it is possible to detect whether the thickness of the elastic retaining ring is finished in place through the gap 15 (see Figure 2);

3) After the finishing of the thickness of the circlip 3 is completed, take out the outer arc-shaped block 4 and the corresponding copper gasket 7, adjust the inner arc-shaped block 2, and after the center of the circlip 3 is aligned, place it on the top of the circlip 3. An inner pressure plate 8 is placed on the surface and between each group of inner arc grooves and gaps, and a copper gasket 7 is lined between the inner pressure block 8 and the circlip, and the inner pressure plate is tightened by pressing the bolt 10 Compress it on the circlip, and process the outer circular surface of the circlip 3 in place (see Figure 5);

In the same way, put in the outer arc-shaped block 4 and the corresponding copper gasket 7, take out the inner arc-shaped block 2 and the corresponding copper gasket 7, adjust the outer arc-shaped block 4, and realize the alignment of the center of the retaining ring 3. On the upper surface of the circlip 3 and between each group of outer arc grooves and gaps, an outer pressure plate 9 is placed, and a copper gasket 7 is lined between the outer pressure plate 9 and the circlip. The bolt 10 compresses the outer pressure plate 9 on the circlip, and processes the inner wall of the circlip 3 in place (see Figure 6);

4) Choose a gap, place the inner arc block 2, the outer arc block 4 and the copper gasket 7 in the inner arc groove and outer arc groove on both sides of the gap, and press the inner pressure plate 8 and the outer The pressing plate 9 processes the opening of the circlip 3 in place, and then drills holes to complete the processing of the circlip 3 (see Fig. 1 and Fig. 9).

The invention not only solves the problem that the large elastic retaining ring cannot be adsorbed and clamped due to low magnetism or no magnetism, but also solves the problem of easy deformation of the clamping caused by large diameter, small thickness and width, and realizes the precision of the large elastic retaining ring. processing.

Claims (7)

1. A processing method for a large-scale high-precision circlip, characterized in that: the processing method includes an annular frock for clamping an elastic circlip (3), and the annular frock includes an annular base (1), which is set on the annular base (1) The middle annular groove (11) at the middle position of the upper surface, on the upper surface of the annular base (1) and outside the middle groove (11), a plurality of outer arc-shaped grooves are evenly spaced in the circumferential direction ( 14), on the upper surface of the annular base (1) and on the inner side of the middle groove (11), there are a plurality of inner arc-shaped grooves (13) evenly spaced along the circumferential direction, corresponding to each inner arc-shaped groove (13) The matched inner arc-shaped block (2) and the outer arc-shaped block (4) matched with each outer arc-shaped groove (14), the outer arc-shaped groove (14) is connected with the middle annular groove (11), and the inner arc-shaped groove (11) is connected. The arc groove communicates with the middle annular groove (11) of (13); the number of the outer arc groove (14) and the inner arc groove (13) are the same and they are arranged in one-to-one correspondence; On the outer edge of the annular base (1) and at the position of each outer annular groove (14), there are at least two radially outer bolt holes matched with the outer adjusting bolts (12), and on the inner wall of the annular base (1) And at least two radially inner bolt holes that match the inner adjusting bolts (6) are provided at each inner annular groove (13), and the radially inner bolt holes communicate with the inner annular groove, and the radially outer bolt holes are connected with the inner annular groove. The bolt hole communicates with the outer annular groove; a notch (15) is processed on the outer surface of the annular base (1) and between every two outer annular grooves (14). 2. The processing method of large-scale high-precision circlip according to claim 1, characterized in that: the depth of the outer arc groove (14) is greater than the depth of the middle annular groove (11), and the inner arc groove (13 ) is greater than the depth of the middle annular groove (11). 3. The processing method of the large-scale high-precision circlip according to claim 1, characterized in that: the heights of the inner arc-shaped block 2 and the outer arc-shaped block 4 do not exceed the inner annular groove (13) and the outer annular groove. (14) groove depth. 4. The processing method of a large-scale high-precision circlip according to claim 1, characterized in that: a plurality of ear seats (16) are welded on the outer surface of the annular base (1). 5. The processing method of the large-scale high-precision circlip according to claim 1, characterized in that: the processing method is specifically: 1) After the rough machining of the circlip (3), place it in the middle annular groove (11) of the annular tooling; place the inner arc-shaped block (2) in the inner and outer arc-shaped block of the inner annular groove (13) (4) placed in the outer annular groove (14); between the outer arc-shaped block (4) and the elastic retaining ring (3), between the inner arc-shaped block (2) and the elastic retaining ring (3) There is a copper gasket (7); through the outer adjusting bolt (12) and the inner adjusting bolt (6), the inner arc-shaped block (2) and the outer arc-shaped block (4) clamp the elastic ring (3), and use the nut ( 5) Lock the adjusting bolt; 2) Hoist and fix the tooling on the platform of the CNC boring and milling machine, and then perform finishing in the thickness direction of the elastic retaining ring (3). During the processing process, it is possible to detect whether the thickness of the elastic retaining ring (3) is finished through the gap (15) in place; 3) After finishing the thickness of the retaining ring (3), take out the outer arc-shaped block (4) and the corresponding copper gasket (7), and adjust the inner arc-shaped block (2) to realize the center alignment of the elastic retaining ring (3). Immediately afterwards, on the upper surface of the circlip (3) and between each set of inner arc grooves (13) and the gap (15), place an inner pressure plate (8), and the inner pressure block (8 ) and the elastic circlip (3) are lined with copper gaskets (7), the inner pressure plate (8) is pressed against the elastic circlip by the compression bolt (10), and the outer circular surface of the elastic circlip (3) processing in place; Put in the outer arc block (4) and the corresponding copper gasket (7), take out the inner arc block (2) and the corresponding copper gasket (7), and adjust the outer arc block (4) to realize the retaining ring (3) After the center is aligned, place an outer pressure plate (9) on the upper surface of the circlip (3) and between each set of outer arc-shaped grooves (14) and the notch (15), and A red copper gasket (7) is lined between the outer pressure plate (9) and the elastic retaining ring (3), and the outer pressure plate (9) is pressed against the elastic retaining ring (3) through the compression bolt (10), and the elastic retainer The inner wall of the circle (3) is processed in place; 4) Choose a gap (15), place the inner arc-shaped block (2) and the outer arc-shaped block ( 4) and the red copper spacer (7), press the inner pressure plate (8) and the outer pressure plate (9) at the same time, process the opening of the circlip (3) in place, and complete the processing of the circlip (3) by drilling. 6. The processing method of a large-scale high-precision circlip according to claim 5, characterized in that: in step 1), the thickness of the circlip (3) is greater than the depth of the middle annular groove (11). 7. The processing method of the large-scale high-precision circlip according to claim 5, characterized in that: in the step 1), the upper end surface of the circlip (3) is knocked to make the lower end surface of the circlip (3) It fits with the bottom plane of the middle annular groove (11); through the notch (15), observe the lower end surface of the circlip (3) and the bottom plane of the middle ring groove (11) to realize the fit.

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