CN115319503B - Clamp for improving position degree of open groove in sealing ring and use method - Google Patents

Abstract

The invention discloses a clamp for improving the position degree of an opening groove in an air sealing ring and a use method thereof, the clamp comprises a base, wherein a compressing and positioning unit and a tool setting angle positioning unit are connected to the base, the lower end of the base is connected with a rotation locking unit, the compressing and positioning unit is connected to the upper end of the base and is used for compressing a part to be processed, and the tool setting angle positioning unit is fixed on one side of the compressing and positioning unit.

Description

A jig for improving the position of opening grooves in gas sealing rings and its application method

technical field

The invention relates to the technical field of production of air seal rings of aero-engines, in particular to a fixture for improving the position of opening grooves in air seal rings and a method of use thereof.

Background technique

In the field of aero-engines, the gas seal ring is an important component of the aero-engine gas seal ring assembly. Its material is a high-temperature alloy. Due to its complex working environment, the integrity of its processed surface plays a very important role in its performance. Its structure is simple, but the position accuracy of the opening slot relative to the positioning hole is relatively strict, and the position of the opening slot and the positioning hole must be on the same line and point to the center of the circle. If the direction of the opening slot and the positioning hole are inconsistent, cracks are likely to occur at the opening slot and the positioning hole during the operation of the engine, and even the metal block of the gas sealing ring will fall down. At present, the company adopts the universal milling machine for processing, the side angle is fixed, and the horizontal sheet milling method makes the direction of the opening groove inconsistent with the direction of the positioning hole, resulting in a low product qualification rate and easy to cause flight safety hazards.

Contents of the invention

The object of the present invention is to provide a fixture and a method of use for improving the position of the opening groove in the gas sealing ring, which is used to solve the defect that the direction of the opening groove and the positioning hole of the existing gas sealing ring are inconsistent during the milling process, and ensure the opening The processing accuracy of the groove improves the product qualification rate.

The invention provides the following technical solutions: a fixture for improving the position of the opening groove in the gas sealing ring, including a base, the base is connected with a pressing positioning unit and a knife-setting angular positioning unit, and the lower end of the base is connected with a rotation locking unit , the pressing and positioning unit is connected to the upper end of the base for pressing the parts to be processed; , the rotation locking unit is used to fix the rotation of the pressing and positioning unit, so that when the rotating locking unit is released, the pressing and positioning unit can be manually rotated to adjust the angular direction of the parts to be processed.

According to the above technical solution, the pressing and positioning unit includes a positioning ring and a shaft, the center of the positioning ring is provided with a sinking groove, the bottom of the sinking groove is provided with a through hole, and a positioning sleeve is fixed inside the base. The locating ring and the locating sleeve on the base are connected through shaft clearance. The upper end of the shaft is provided with a threaded hole. Located above the positioning ring, the parts to be processed are placed between the upper platen and the positioning ring, and a positioning hole is opened on the flange side of the shaft, and the positioning hole extends downwards to form the bottom of the positioning ring. The locating pin causes the shaft to rotate simultaneously with the locating ring.

According to the above technical solution, the upper pressing plate includes a circular ring, and two horn pressing plates are formed obliquely upward on the circular ring. Notches are formed on the circular ring, and the horn pressing plates are distributed symmetrically around the notches.

According to the above technical solution, the outer surface of the positioning ring is provided with a slotted hole for removing cutting fluid and iron filings, and the bottom surface of the slotted hole is flush with the bottom surface of the sinker.

According to the above technical solution, the angular positioning unit for tool setting includes a guide block, a slot that fits with the guide block is provided on the base, the guide block is inserted into the slot, and the side of the guide block is limited. A position hole and a guide hole, a cylindrical pin is fixed in the limit hole to limit the guide block up and down, a bush is fixed in the guide hole, a guide rod slides in the bush, and the positioning ring is evenly opened There is an angular hole, and the guide rod is inserted through the bushing into the angular hole of the part to be processed and simultaneously inserted into the angular hole on the positioning ring.

According to the above technical solution, the upper end of the guide block is formed with a knife setting groove.

According to the above technical solution, the rotation locking unit includes a lower pressing plate, a groove is formed at the lower end of the base, the lower pressing plate is embedded in the groove, and a connecting hole is formed at the lower end of the lower pressing plate, and the connecting hole is in clearance fit with the shaft , the lower end of the shaft is sleeved with a spherical washer, the lower end of the spherical washer is threadedly connected with a bottom nut on the shaft, a conical groove is formed on the outer surface of the connecting hole, the spherical washer is fitted in the conical groove, and the base A locking hole is provided above the two ends of the lower pressing plate, a hex nut is fixed on the locking hole at one end, the inner thread of the hex nut is connected with a flat-end tightening screw, and the inner thread of the locking hole at the other end is connected with a compression screw.

According to the above technical solution, a rectangular groove is provided at the lower end of the base, and positioning keys are connected to the rectangular groove through fasteners, and U-shaped grooves are provided at both ends of the base.

The present invention also provides the following technical solution: a method of using a jig for improving the position of the opening groove in the gas sealing ring, including the above-mentioned jig, and the usage method is as follows:

Step 1. Fix the fixture on the workbench of the milling machine;

Step 2, placing and pressing the parts to be processed on the locking and positioning unit;

Step 3: Perform angular positioning and tool setting on the part to be processed by the tool setting angular positioning unit, and lock the rotation locking unit, then pull the guide rod out of the angular positioning hole and pull out the tool setting angular positioning unit from the base, and then Milling of slots;

Step 4. Loosen the rotation locking unit and release the angular positioning, rotate the compression positioning unit to the next angular direction, perform angular positioning by the tool setting angular positioning unit again, and then tighten the rotation locking unit to fix the compression positioning unit , and then pull the guide rod out of the angular positioning hole and pull out the tool setting angular positioning unit from the base for the next milling process, cycle step 4 to complete the processing of all opening slots.

Compared with the prior art, the beneficial effect achieved by the present invention is: by adopting the positioning processing method in which the fixed angle is consistent with the milling direction, the guide rod is used to position the sealing ring, and the locking is realized by pressing the screw The overall locking and rotation of the positioning unit facilitates the rotation of the position of the gas sealing ring, making it convenient to adjust the position of the opening slot to the milling cutter, which improves the processing efficiency, and the positioning ring is equipped with a hole corresponding to the gas sealing ring. Notch, during processing, the sealing ring is aligned with the notch of the positioning ring, thereby improving the machining accuracy.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, and are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the attached picture:

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

Fig. 2 is a schematic cross-sectional view of the overall structure of the present invention;

Fig. 3 is a schematic top view of the overall structure of the present invention;

Fig. 4 is a schematic structural view of the positioning ring of the present invention;

Fig. 5 is a schematic cross-sectional structure diagram of the upper platen of the present invention;

Fig. 6 is a schematic top view of the structure of the upper platen of the present invention;

Fig. 7 is a schematic structural view of the guide block of the present invention;

Fig. 8 is a schematic top view of the structure of the base of the present invention;

Fig. 9 is a schematic cross-sectional view of the lower platen of the present invention;

In the figure: 1, upper pressing plate; 101, circular ring; 102, horn pressing plate; 103, notch; 2, positioning ring; 201, sinking groove; 202, through hole; 203, slotted hole; 3, locking screw ; 4, shaft; 401, positioning hole; 5, positioning pin; 6, flat end tightening screw; 7, hex nut; 8, base; 801, slot; 802, groove; 803, rectangular slot; 9, guide block; 901, limit hole; 902, guide hole; 10, bushing; 11, guide rod; 12, positioning sleeve; 13, lower pressure plate; 131, connecting hole; 132, conical groove; 14, spherical washer; 15, bottom nut ; 17, positioning key; 18, cylindrical pin; 19, compression screw.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example

Please refer to Figures 1 to 3, the present invention provides a technical solution: a fixture for improving the position of the opening groove in the gas sealing ring, including a base 8, which is connected with a pressing positioning unit and a knife-setting angular positioning unit, the base 8 The lower end of the tool is connected with a rotation locking unit, and the pressing and positioning unit is connected to the upper end of the base 8 for pressing the parts to be processed. For the angular direction of the part, the rotating locking unit is used to fix the direction of the pressing and positioning unit. The processed parts are clamped and fixed, and then the angular positioning unit of the tool is used to position the parts to be processed in the angular direction, and the rotation locking unit is locked to fix the pressing positioning unit, and then milling is carried out to process the opening groove of the gas sealing ring Come out, then loosen the rotation locking unit, so that the pressing and positioning unit can rotate as a whole, turn the part to be processed to the next angular direction, and then lock the rotation locking unit for milling.

As shown in Figures 1 to 4, the pressing and positioning unit includes a positioning ring 2 and a shaft 4. The center of the positioning ring 2 is provided with a sinking groove 201, and the bottom of the sinking groove 201 is provided with a through hole 202, and a positioning ring is fixed in the base 8. The sleeve 12, the positioning ring 2 and the positioning sleeve 12 on the base 8 are connected through the clearance of the shaft 4. The upper end of the shaft 4 is provided with a threaded hole, and the upper end of the shaft 4 is threaded with a locking screw 3 to press the upper platen 1 on the shaft 4. Above, the upper end of the upper platen 1 is located above the positioning ring 2, the parts to be processed are placed between the upper platen 1 and the positioning ring 2, and a positioning hole 401 is opened on the flange side of the shaft 4, and the positioning hole 401 is extended downward and formed on the positioning ring 2, by inserting the positioning pin 5 into the positioning hole 401, the shaft 4 and the positioning ring 2 rotate simultaneously, and the distance between the upper platen 1 and the locking screw 3 is controlled by the rotation of the locking screw 3, so that the parts to be processed Fixed on the positioning ring 2.

As shown in Figures 5 and 6, the upper pressing plate 1 comprises a circular ring 101, and the circular ring 101 is formed with at least two horn pressing plates 102 obliquely upwards, the circular ring 101 is provided with a notch 103, and the horn pressing plate 102 is centered on the notch 103 Symmetrically distributed, the horn pressing plate 102 can be pressed on the positioning ring 2 to fix the gas sealing ring on the positioning ring 2 .

The outer surface of the positioning ring 2 is provided with a slotted hole 203 for removing cutting fluid and iron chips. flow out.

As shown in Figure 7, the tool setting angular positioning unit includes a guide block 9, and the base 8 is provided with a slot 801 that is clearance-fitted with the guide block 9, and the guide block 9 is inserted in the slot 801, and the side of the guide block 9 is limited. Position hole 901 and guide hole 902, a cylindrical pin 18 is fixed in the limit hole 901 to limit the guide block 9 up and down, a bushing 10 is fixed in the guide hole 902, a guide rod 11 slides in the bush 10, and a positioning ring 2 is evenly provided with angular holes, and the guide rod 11 is inserted into the angular hole of the part to be processed through the bushing 10 and inserted into the angular hole on the positioning ring 2 at the same time. Through the angular hole on the part to be processed and the positioning ring 2, the processing position of the part to be processed is aligned with the angular hole on the positioning ring 2, thereby improving the processing accuracy of the part to be processed.

The upper end of guide block 9 is formed with a tool setting groove, which is convenient for tool setting.

As shown in Figures 1, 2 and 9, the rotation locking unit includes a lower pressing plate 13, the lower end of the base 8 is formed with a groove 802, the lower pressing plate 13 is embedded in the groove 802, and the lower end of the lower pressing plate 13 forms a connection hole 131, the connecting hole 131 is in clearance fit with the shaft 4, the lower end of the shaft 4 is sleeved with a spherical washer 14, the lower end of the spherical washer 14 is threadedly connected with the bottom nut 15 on the shaft 4, a conical groove 132 is formed on the outer surface of the connecting hole 131, and the spherical washer 14 fits in the conical groove 132, the base 8 is provided with locking holes above the two ends of the lower pressing plate 13, a hexagonal nut 7 is fixed on the locking hole at one end, and the inner thread of the hexagonal nut 7 is connected with a flat end tightening screw 6, and the other The internal thread of the locking hole at one end is connected to the compression screw 19. By the rotation of the compression screw 19, the levelness of the lower pressing plate 13 is controlled. The lower pressing plate 13 remains horizontal, and there is a gap between the lower pressing plate 13, the shaft 4 and the spherical washer 14. The shaft 4 can rotate, so that the pressing and positioning unit can rotate, and the positioning ring can be rotated to adjust the angular position of the part to be processed. When the pressing screw 19 is tightened downward, the pressing plate 13 will be inclined, so that the lower pressing plate 13, the spherical surface The washer 14 and the shaft 4 are compressed together, which increases the friction between the lower pressure plate 13 and the spherical washer 14 and between the shaft 4 and the spherical washer 14 so that the shaft 4 cannot rotate, thereby fixing the positioning ring 2 and further pressing The tight positioning unit is locked to fix the parts to be processed.

As shown in Figure 8, the lower end of the base 8 is also provided with a long rectangular groove 803, the rectangular groove 803 is connected with a positioning key 17 by a fastener, and the two ends of the base 8 are provided with a U-shaped groove, through the positioning key 17, It is convenient to fix the base 8 on the milling machine, and at the same time, the U-shaped groove can conveniently fix the base 8 on the working table of the milling machine through the clamp.

The present invention also provides a technical solution: a method of using a jig for improving the position of the opening groove in the gas sealing ring, including the above-mentioned jig, and the usage method is as follows:

Step 1. Fix the fixture on the workbench of the milling machine;

Step 2, placing and pressing the parts to be processed on the pressing and positioning unit;

Step 3: Perform angular positioning and tool setting on the part to be processed by the tool setting angular positioning unit, and lock the rotation locking unit, then pull the guide rod 11 out of the angular positioning hole and pull out the tool setting angular positioning unit from the base 8 , and then milling of the notch;

Step 4. Loosen the rotation locking unit and release the angular positioning, rotate the compression positioning unit to the next angular direction, perform angular positioning by the tool setting angular positioning unit again, and then tighten the rotation locking unit to fix the compression positioning unit , and then pull the guide rod 11 out of the angular positioning hole and pull out the tool set angular positioning unit from the base for the next milling process, cycle step 4 to complete the processing of all opening slots.

Finally, it should be noted that: the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still The technical solutions recorded in the foregoing embodiments may be modified, or some technical features thereof may be equivalently replaced. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (5)

1. The utility model provides an improve anchor clamps of open slot position degree in sealing ring, includes the base, be connected with on the base and compress tightly positioning unit and tool setting angular positioning unit, the lower extreme of base is connected with and rotates locking unit, its characterized in that: the pressing and positioning unit is connected to the upper end of the base and used for pressing the part to be processed, the tool setting angular positioning unit is fixed on one side of the pressing and positioning unit and used for positioning the angular direction of the part to be processed, and the rotation locking unit is used for fixing the turning direction of the pressing and positioning unit, so that when the rotation locking unit is convenient to loosen, the pressing and positioning unit is manually rotated to adjust the angular direction of the part to be processed;

the pressing and positioning unit comprises a positioning ring and a shaft, wherein a sinking groove is formed in the center of the positioning ring, a through hole is formed in the bottom of the sinking groove, a positioning sleeve is fixed in the base, the positioning ring is connected with the positioning sleeve on the base through shaft clearance fit, the shaft penetrates through the positioning ring and is in clearance fit with the positioning sleeve, a threaded hole is formed in the upper end of the shaft, the upper end of the shaft is connected with a locking screw through threads to press an upper pressing plate on the shaft, the upper end of the upper pressing plate is located above the positioning ring, a part to be processed is placed between the upper pressing plate and the positioning ring, a positioning hole is formed in the flange edge of the shaft, the positioning hole extends downwards to be formed in the bottom of the positioning ring, and the shaft and the positioning ring rotate simultaneously through inserting a positioning pin into the positioning hole;

the tool setting angular positioning unit comprises a guide block, a slot which is in clearance fit with the guide block is formed in the base, the guide block is inserted into the slot, a limiting hole and a guide hole are formed in the side face of the guide block, a cylindrical pin is fixed in the limiting hole to limit the guide block up and down, a bushing is fixed in the guide hole, a guide rod slides in the bushing, angular holes are uniformly formed in the positioning ring, the guide rod penetrates through the bushing to be inserted into the angular holes of a part to be processed and is simultaneously inserted into the angular holes of the positioning ring, and a tool setting groove is formed in the upper end of the guide block;

the rotation locking unit comprises a lower pressing plate, the lower extreme shaping of base has a recess, and the lower pressing plate embedding is in the recess, the lower extreme shaping connecting hole of lower pressing plate, connecting hole and axle clearance fit have cup jointed the sphere packing ring on the lower extreme of axle, the lower extreme of sphere packing ring has bottom nut at epaxial threaded connection, and the shaping has the circular cone groove on the surface of connecting hole, and sphere packing ring gomphosis is in the circular cone inslot, the locking hole has been seted up in the both ends top of lower pressing plate on the base, is fixed with hexagon nut on the locking hole of one end, and hexagon nut internal thread connection has the flat end screw down, and the locking hole internal thread connection hold-down screw of the other end.

2. The fixture for improving the position of an open slot in an air sealing ring according to claim 1, wherein: the upper pressing plate comprises a circular ring, two claw pressing plates are formed obliquely above the circular ring, notches are formed in the circular ring, and the claw pressing plates are symmetrically distributed with the notches as centers.

3. The fixture for improving the position of an open slot in an air sealing ring according to claim 1, wherein: the outer surface of the positioning ring is provided with a slotted hole for removing cutting fluid and scrap iron, and the bottom surface of the slotted hole is flush with the bottom surface of the sinking groove.

4. The fixture for improving the position of an open slot in an air sealing ring according to claim 1, wherein: rectangular grooves are further formed in the lower end of the base, positioning keys are connected in the rectangular grooves through fasteners, and U-shaped grooves are formed in the two ends of the base.

5. The application method of the clamp for improving the position degree of the open slot in the sealing ring is characterized by comprising the following steps of: a clamp comprising the claims 1 to 4, the method of use being as follows:

step one, fixing a clamp on a workbench of a milling machine;

secondly, placing and compacting the part to be processed on a locking and positioning unit;

step three, carrying out angular positioning and tool setting on the part to be processed by a tool setting angular positioning unit, locking a rotation locking unit, then extracting an angular positioning hole from a guide rod, extracting the tool setting angular positioning unit from a base, and carrying out milling of a notch;

and fourthly, loosening the rotary locking unit, rotating to compress the positioning unit to the next angular direction, performing angular positioning and tool setting by the tool setting angular positioning unit again, screwing the rotary locking unit again, fixing the compressing positioning unit, then drawing the guide rod out of the angular positioning hole and drawing the tool setting angular positioning unit out of the base, performing the next milling, and repeating the fourth step until all the open grooves are finished.