Dynamic and static vortex plate straight-pulling internal-supporting type centering chuck and using method thereof

Abstract

The invention discloses a dynamic and static vortex plate straight-pulling inner-supporting type centering chuck and a using method thereof, and belongs to the field of compressor part machining. According to the technical scheme, the centering chuck is characterized by comprising the steps that S1, three outer clamping claws move upwards and rotate back to the center of a base body; s2, the dynamic and static vortex plates are placed on the seat body, and the three inner supporting claws are clamped into the circular grooves; s3, three inner supporting claws are driven; s4, the three outer clamping claws move downwards and rotate and return towards the center of the base body; and S5, the seat body is driven to conduct one-way numerical control displacement along the X axis, the cutter is driven to conduct one-way numerical control displacement along the Y axis, and the cutter cuts the vortex structure on the dynamic and static vortex plates. The movement of the seat body and the cutter is one-way movement, so that the normal clearance of a quadrant critical point can be effectively eliminated in the cutting process of the dynamic and static vortex plates, the product machining precision is improved, and the operation efficiency of the compressor is improved when the dynamic and static vortex plates are applied to the compressor.

Description

Technical Field

[0001] The invention relates to the field of compressor component processing, and more specifically, to a dynamic and static scroll straight-pull inner-support type centering chuck and a use method thereof. Background Art

[0002] The moving and static scrolls are usually used in high-performance mechanical equipment such as turbine engines or compressors. The moving and static scroll system is a key component in turbine engines, mainly used for airflow guidance, energy transmission and conversion. During the milling process of the moving and static scrolls, the moving and static scrolls need to be fixed. The role of the chuck is to ensure that the workpiece can be stably and accurately fixed during the processing, thereby ensuring the processing quality and processing accuracy.

[0003] The traditional chuck uses a three-jaw method to clamp and fix the dynamic and static disks, and then uses a movable displacement tool to perform turning and milling processing along the vortex direction of the dynamic and static disks. Due to the vortex structure, the tool performs CNC displacement along the X-axis and Y-axis. This processing method is prone to form vertical lines on the dynamic and static disks at the intersection of the quadrants. The existence of vertical lines can easily cause the dynamic and static disks to affect the efficiency of the compressor when the dynamic and static disks work together.

[0004] Therefore, new solutions need to be proposed to solve this problem. Summary of the invention

[0005] In view of the deficiencies in the prior art, an object of the present invention is to provide a dynamic and static scroll direct-pull internally supported centering chuck and a method of using the same.

[0006] The above-mentioned technical purpose of the present invention is achieved through the following technical scheme: a direct-pull internal support type centering chuck of a movable and static scroll, comprising a seat body, three outer claws are arranged on the seat body, and the three outer claws are distributed in a circular array with the center line of the seat body as the axis. The three outer claws are pressed downward on the outer edge of the movable and static scroll and can limit the rotation of the movable and static scroll. Three inner support claws are also arranged on the seat body, and the three inner support claws are arranged close to the center of the seat body. The inner support claws can move away from the center of the seat body, and the connecting line between any one of the inner support claws and the center of the seat body is located between two adjacent outer claws.

[0007] The present invention is further configured as follows: an inflation chamber is provided in the seat body, three cylinder bodies are fixedly connected to the seat body, a sliding chamber connected to the inflation chamber is opened on the top surface of the cylinder body, a sealing rod is slidably connected in the sliding chamber, and the outer claw is fixedly connected to the top of the sealing rod.

[0008] The present invention is further configured such that: during the upward movement of the sealing rod, the outer claw can rotate away from the center of the seat body.

[0009] The present invention is further configured as follows: a through hole connected to the sliding cavity is opened on the outer wall of the cylinder body, a guide groove is opened on the outer wall of the sealing rod, a guide pin with one end always embedded in the guide groove is provided in the through hole, and the guide groove includes a vertical groove and a circumferential groove connected to each other.

[0010] The present invention is further configured as follows: a positioning bolt is fixedly connected to the seat body, and the positioning bolt restricts the rotation of the movable and stationary scrolls by being clamped into the bottom surface of the movable and stationary scrolls.

[0011] The present invention is further configured as follows: an embedding groove is provided on the bottom wall of the inflation cavity, the end of the sealing rod facing away from the outer claw can be embedded in the embedding groove, and an annular groove is provided on the outer peripheral wall of the sealing rod, and the distance between the annular groove and the end of the sealing rod facing away from the outer claw is equal to the depth of the embedding groove.

[0012] A method for using a dynamic and static scroll direct-pull inner-support type centering chuck, comprising: Step S1, inflating the inflation chamber so that the three outer claws move upward and the three claws rotate back toward the center of the seat body; Step S2, placing the movable and stationary scrolls on the seat body, so that the three inner support claws are inserted into the circular groove at the center of the bottom surface of the movable and stationary scrolls, and the positioning bolts on the seat body are inserted into the grooves on the bottom surface of the movable and stationary scrolls; Step S3, driving the three inner supporting claws so that the three inner supporting claws move back toward the center of the seat body and press against the inner peripheral wall of the circular groove; Step S4, after releasing the gas in the inflation chamber, the gas in the inflation chamber is extracted again, so that the three outer claws move downward and the three outer claws rotate back toward the center of the seat body until the three outer claws are clamped into the clamping grooves on the outer edges of the dynamic and static scrolls; Step S5, driving the seat body to perform unidirectional CNC displacement along the X-axis, driving the tool to perform unidirectional CNC displacement along the Y-axis, and the tool cuts the scroll structure on the movable and stationary scrolls; Step S6, after the milling is completed, the movable and stationary scrolls are removed from the seat body, and the milling effect of the movable and stationary scrolls is detected.

[0013] In summary, the present invention has the following beneficial effects: The position of the movable and static scrolls is restricted in the horizontal direction by means of internal support fixation, and the position of the movable and static scrolls is restricted in the vertical direction by means of external clamps, and the structures of the external clamps and internal supports are evenly distributed at various positions of the movable and static scrolls, so that various positions of the movable and static scrolls have a good fixing effect both in the horizontal direction and in the vertical direction, thereby ensuring that the vibration degree of the movable and static scrolls is small during the cutting process, thereby ensuring the cutting effect.

[0014] The movement of the seat body and the tool is unidirectional, so that in the process of cutting the moving and static scrolls, the normal clearance of the quadrant critical point can be effectively eliminated, thereby improving the accuracy of product processing and improving the efficiency of the compressor operation when the moving and static scrolls are used in the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of the seat body in the present invention; Figure 3 The cross-sectional view of the seat body in the present invention Figure 1 ; Figure 4 The cross-sectional view of the seat body in the present invention Figure 2 ; Figure 5 It is a partial structural schematic diagram of the seat body in the present invention, used to show the structure of the guide groove; Figure 6 A top view of the present invention; Figure 7 The structure of the dynamic and static scroll in the present invention is shown in FIG. Figure 1 ; Figure 8 The structure of the dynamic and static scroll in the present invention is shown in FIG. Figure 2 .

[0016] In the figure: 1, seat body; 2, outer clamping claw; 3, inner support claw; 4, inflation chamber; 5, cylinder body; 6, sealing rod; 7, through hole; 8, guide groove; 9, vertical groove; 10, circumferential groove; 11, positioning bolt; 12, embedded groove; 13, annular groove; 14, circular groove; 15, concave groove; 16, clamping groove; 17, long groove one; 18, long groove two. DETAILED DESCRIPTION

[0017] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments. Example 1

[0018] Dynamic and static scroll direct pull inner support type centering chuck, such as Figure 1 , Figure 2 , Figure 7 and Figure 8As shown, it includes a seat body 1, on which are arranged three outer claws 2, which are distributed in a ring array with the center line of the seat body 1 as the axis, and the three outer claws 2 are pressed downwardly on the outer edge of the movable and static scrolls and can limit the rotation of the movable and static scrolls. The seat body 1 is also provided with three inner support claws 3, which are arranged close to the center of the seat body 1, and the three inner support claws 3 are close to each other to form a circular ring shape, and the inner support claws 3 can move away from the center of the seat body 1. It is worth mentioning that a circular groove 14 is provided at the lower end of the movable and static scroll, and three clamping grooves 16 are provided on the movable and static scrolls, and the three clamping grooves 16 are all connected to the outer edge of the movable and static scrolls. The circular groove 14 and the clamping groove 16 structure are formed after the dynamic and static scrolls are forged. People extend the three inner support claws 3 into the circular groove 14 to achieve the pre-placement of the dynamic and static scrolls. When the three inner support claws 3 move away from the center of the seat body 1, the position of the dynamic and static scrolls will slowly adjust, thereby achieving a self-centering effect, ensuring that the center of each dynamic and static scroll can be aligned with the center of the seat body 1. The three inner support claws 3 fix the center of the dynamic and static disks by means of internal support fixing. After the center of the dynamic and static scrolls is fixed, the three outer clamping claws 2 move downward and are respectively embedded in the three clamping grooves 16 for positioning clamping. The three outer claws 2 ensure the fixing strength of the outer edge of the movable and static scroll by straight pulling, so that the movable and static scroll is not easy to move in the vertical direction. The connection line between any inner support claw 3 and the center of the seat body 1 is located between two adjacent outer claws 2. Specifically, the three inner support claws 3 and the three outer claws 2 are distributed in a circular array with the center line of the seat body 1 as the axis. In the process of the circular array, the inner support claws 3 and the outer claws 2 are alternately arranged in sequence, and the angle between adjacent inner support claws 3 and outer claws 2 is 60 degrees. In the process of cutting the movable and static scroll, the tool exerts a certain force on the movable and static scroll in all directions, such as : During the movement of the tool, the tool exerts a horizontal force on the movable and static scrolls. Because the tool is arranged in a spiral shape, the tool exerts a vertical force on the movable and static scrolls during the rotation of the tool, and so on. The horizontal position of the movable and static scrolls is limited by the internal support, and the vertical position of the movable and static scrolls is limited by the external clamp. The structures of the external clamp and the internal support are evenly distributed at various positions of the movable and static scrolls, so that each position of the movable and static scrolls has a good fixing effect both in the horizontal direction and in the vertical direction, thereby ensuring that the vibration degree of the movable and static scrolls is small during the cutting process, thereby ensuring the cutting effect.

[0019] like Figure 3 , Figure 4 and Figure 5As shown, an air-filling chamber 4 is provided in the seat body 1, and three cylinder bodies 5 are fixedly connected to the seat body 1. A sliding chamber connected to the air-filling chamber 4 is provided on the top surface of the cylinder body 5. A sealing rod 6 is slidably connected in the sliding chamber. The sealing performance between the sealing rod 6 and the sliding chamber is relatively strong, so that external air cannot flow into the air-filling chamber 4 through the sliding chamber. The outer clamping claw 2 is fixedly connected to the top of the sealing rod 6. People inflate the air-filling chamber 4 to make the sealing rod 6 move upward under the action of air pressure. Through pneumatic control, the movement of the three sealing rods 6 can be driven as a whole, which is convenient for people to control the lifting and lowering of the three outer clamping claws 2. When the sealing rod 6 moves upward, the outer clamping claw 2 can rotate back to the center of the seat body 1. This arrangement makes the sealing After the sealing rod 6 moves upward to the limit position, the projections of the three outer claws 2 above the seat body 1 are arranged close to the edge of the seat body 1, so that the three outer claws 2 will not interfere with the placement of the movable and static scrolls, thereby facilitating people to place the movable and static scrolls. A through hole 7 connected to the sliding cavity is provided on the outer peripheral wall of the cylinder body 5, and a guide groove 8 is provided on the outer peripheral wall of the sealing rod 6. A guide pin with one end always embedded in the guide groove 8 is provided in the through hole 7. The guide groove 8 includes a vertical groove 9 and a circumferential groove 10 that are connected to each other. The lower end of the vertical groove 9 is connected to one end of the circumferential groove 10. When the outer claws 2 are inserted into the groove 16 of the movable and static scrolls, the guide pin is located in the vertical groove 9. When people need to remove the movable and static scrolls from the seat body 1, people pneumatically drive the three sealing rods. 6 rises, at this time the guide pin located in the vertical groove 9 will gradually approach the circumferential groove 10, when the guide pin enters the circumferential groove 10, under the guiding action of the circumferential groove 10, the three outer claws 2 will rotate back to the center of the seat body 1, similarly, when people need to clamp the outer claws 2 on the movable and stationary scrolls, the sealing rod 6 will move downward, during this process, the guide pin will slide out of the circumferential groove 10 and enter the vertical groove 9, so that the three outer claws 2 can be rotated back to their original positions, and an embedding groove 12 is provided on the bottom wall of the inflation chamber 4, and the end of the sealing rod 6 facing away from the outer claw 2 can be embedded in the embedding groove 12, and an annular groove 13 is provided on the outer peripheral wall of the sealing rod 6, and the distance between the annular groove 13 and the end of the sealing rod 6 facing away from the outer claw 2 is equal to the depth of the embedding groove 12 When the outer claw 2 is inserted into the groove 16, the lower end of the sealing rod 6 is embedded in the embedded groove 12. When the movable and static scrolls are cut by the tool, the movable and static scrolls will be subjected to horizontal force, and the outer claw 2 will transmit this force to the sealing rod 6. The lower end of the sealing rod 6 is limited in the embedded groove 12, so that the sealing rod 6 is not easy to tilt, thereby ensuring the sealing between the sealing rod 6 and the sliding cavity. After the sealing rod 6 is embedded in the embedded groove 12, the air in the inflation cavity 4 is not easy to drive the sealing rod 6 to move by pushing the lower end of the sealing rod 6. The annular groove 13 provides a fulcrum for the pneumatically driven sealing rod 6, so that the air can pneumatically push the sealing rod 6 to move by pushing the upper inner wall or the lower inner wall of the annular groove 13, thereby ensuring the efficiency of the pneumatic drive.

[0020] like Figure 1 and Figure 5As shown, a positioning bolt 11 is fixedly connected to the seat body 1, and the bolt head of the positioning bolt 11 is exposed on the seat body 1. The positioning bolt 11 limits the rotation of the movable and static scrolls by being clamped into the bottom surface of the movable and static scrolls. It is also worth mentioning that a groove 15 is provided on the lower bottom surface of the movable and static scrolls, and the width of the groove 15 is equal to the diameter of the bolt head. In the process of placing the movable and static scrolls on the seat body 1, people need to clamp the bolt head of the positioning bolt 11 into the groove 15. The three inner support claws 3 can center the movable and static scrolls so that the movable and static scrolls will not move in the horizontal direction. However, it cannot be guaranteed that the three clamping grooves 16 on the movable and static scrolls can be aligned with the three outer clamping claws 2 during each installation of the movable and static scrolls. The setting of the positioning bolt 11 ensures that the position of the movable and static scrolls is the same each time they are installed on the seat body 1, thereby ensuring that the three outer clamping claws 2 can be aligned with the three clamping grooves 16 during subsequent external clamping.

[0021] like Figure 6 As shown, the seat body 1 is provided with a long slot 17 and a long slot 2 18 which are perpendicular to each other. The length direction of the long slot 17 is arranged along the X-axis, and the length direction of the long slot 2 18 is arranged along the Y-axis. Example 2

[0022] A method for using a dynamic and static scroll direct-pull inner-support type centering chuck, such as Figure 1 , Figure 6 , Figure 7 and Figure 8 As shown, including, Step S1, inflating the inflation chamber 4 so that the three outer claws 2 move upward and the three claws rotate away from the center of the seat body 1; Step S2, placing the movable and stationary scrolls on the seat body 1, so that the three inner support claws 3 are inserted into the circular groove 14 at the center of the bottom surface of the movable and stationary scrolls, and the positioning bolts 11 on the seat body 1 are inserted into the grooves 15 on the bottom surface of the movable and stationary scrolls; Step S3, driving the three inner supporting claws 3 so that the three inner supporting claws 3 move away from the center of the seat body 1 and press against the inner peripheral wall of the circular groove 14; By synchronously driving the movement of the three inner support claws 3, the seat body 1 can achieve self-centering. In the process of self-centering, the positioning bolts 11 are used to limit the position, so that the movable and static scrolls are not easy to rotate on the seat body 1, ensuring that after each self-centering, the states of the movable and static scrolls on the seat body 1 are the same.

[0023] Step S4, after releasing the gas in the inflation chamber 4, the gas in the inflation chamber 4 is extracted again, so that the three outer claws 2 move downward and the three outer claws 2 rotate back toward the center of the seat body 1 until the three outer claws 2 are clamped into the clamping grooves 16 on the outer edges of the dynamic and static scrolls; The outer clamping claw 2 can apply downward pressure to the outer edge of the movable and static scroll to ensure that the lower side of the movable and static scroll is in a tight state with the seat body 1, so that the movable and static scroll is installed in the same position in the vertical direction of the seat body 1 each time, thereby ensuring the effect of subsequent tool cutting. In addition, due to the setting of the slot 16, the outer clamping claw 2 can also limit the movable and static scroll in the horizontal direction by contacting the inner wall of the slot 16. During the tool cutting process, the horizontal force of the tool on the movable and static scroll is greater than the vertical force. Therefore, the outer clamping claw 2 not only ensures the vertical limitation of the movable and static scroll, but also gives the movable and static scroll a certain limitation in the horizontal direction. By cooperating with the three inner support claws 3, the horizontal limitation of the movable and static scroll by the clamping claw is more secure.

[0024] Step S5, driving the seat body 1 to perform unidirectional CNC displacement along the X-axis, driving the tool to perform unidirectional CNC displacement along the Y-axis, and the tool cuts the scroll structure on the movable and stationary scrolls; Step S6, after the milling is completed, the movable and stationary scrolls are removed from the seat body 1, and the milling effect of the movable and stationary scrolls is detected.

[0025] Since the centers of the vortex structures on the movable and static scrolls are not at the same point in the arcs of each quadrant, a normal gap exists at the critical point of the quadrant. The existing processing method is that the seat body 1 is stationary, and the tool can move along the X-axis and the Y-axis at the same time. When the tool moves to the critical point of the quadrant, due to the change of the center of the vortex structure, the movement rate of the tool in the X-axis and the Y-axis will change compared with the movement rate of the previous quadrant. In the process of the tool rate changing in both directions, since the two directions change in sequence, the tool is prone to form vertical lines on the movable and static scrolls at the intersection of the quadrants. In the present invention, the platform for loading the seat body 1 moves unidirectionally along the X-axis, and the tool moves unidirectionally along the Y-axis. Therefore, when the rate at the critical point of the quadrant changes, the X-axis and the Y-axis change simultaneously. Therefore, the normal gap at the critical point of the quadrant can be eliminated, so that vertical lines are not easy to appear on the movable and static scrolls, thereby achieving the purpose of eliminating defects, improving the accuracy of product processing, and improving the efficiency of the compressor.

[0026] In the step S6 detection, the focus is also on the position of the quadrant critical point. The seat body 1 is provided with a long groove 17 and a long groove 2 18 which are perpendicular to each other. The position of the long groove 17 and the long groove 2 18 is the critical point of the quadrant change. Before people remove the movable and static scrolls from the seat body 1, with the assistance of the long groove 17 and the long groove 2 18, people can focus on observing the position of the quadrant critical point to see the processing effect at this position, which can more conveniently distinguish defective products.

[0027] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A dynamic and static scroll direct pull inner support type centering chuck, characterized in that: The invention comprises a seat body (1), wherein three outer clamping claws (2) are arranged on the seat body (1), and the three outer clamping claws (2) are distributed in a ring array with the center line of the seat body (1) as the axis, and the three outer clamping claws (2) are pressed downwardly on the outer edge of the movable and stationary scrolls and can limit the rotation of the movable and stationary scrolls, and the seat body (1) is also provided with three inner support claws (3), and the three inner support claws (3) are arranged close to the center of the seat body (1), and the inner support claws (3) can move in the direction away from the center of the seat body (1), and the connection line between any one of the inner support claws (3) and the center of the seat body (1) is located between two adjacent outer clamping claws (2).

2. The dynamic and static scroll direct-pull inner-support type centering chuck according to claim 1 is characterized in that: An air filling chamber (4) is provided in the seat body (1), three cylinder bodies (5) are fixedly connected to the seat body (1), a sliding chamber connected to the air filling chamber (4) is provided on the top surface of the cylinder body (5), a sealing rod (6) is slidably connected in the sliding chamber, and the outer claw (2) is fixedly connected to the top of the sealing rod (6).

3. The dynamic and static scroll direct-pull inner-support type centering chuck according to claim 2 is characterized in that: When the sealing rod (6) moves upward, the outer claw (2) can rotate away from the center of the seat body (1).

4. The dynamic and static scroll direct-pull inner-support type centering chuck according to claim 3 is characterized in that: A through hole (7) communicating with the sliding chamber is formed on the outer peripheral wall of the cylinder body (5), a guide groove (8) is formed on the outer peripheral wall of the sealing rod (6), a guide pin having one end always embedded in the guide groove (8) is provided in the through hole (7), and the guide groove (8) includes a vertical groove (9) and a circumferential groove (10) communicating with each other.

5. The dynamic and static scroll direct-pull inner-support type centering chuck according to claim 4 is characterized in that: A positioning bolt (11) is fixedly connected to the seat body (1), and the positioning bolt (11) is clamped into the bottom surface of the moving and stationary scrolls to limit the rotation of the moving and stationary scrolls.

6. The dynamic and static scroll direct-pull inner-support type centering chuck according to claim 2, characterized in that: The bottom wall of the inflation chamber (4) is provided with an embedding groove (12), and the end of the sealing rod (6) facing away from the outer claw (2) can be embedded in the embedding groove (12). The outer peripheral wall of the sealing rod (6) is provided with an annular groove (13), and the distance between the annular groove (13) and the end of the sealing rod (6) facing away from the outer claw (2) is equal to the depth of the embedding groove (12).

7. A method for using a dynamic and static scroll straight-pull internal support type centering chuck, applied to a dynamic and static scroll straight-pull internal support type centering chuck as claimed in any one of claims 1 to 6, characterized in that: include, Step S1, inflating the inflation chamber (4) so ​​that the three outer claws (2) move upward and the three claws rotate away from the center of the seat body (1); Step S2, placing the movable and stationary scrolls on the seat body (1), so that the three inner support claws (3) are inserted into the circular groove (14) at the center of the bottom surface of the movable and stationary scrolls, and the positioning bolts (11) on the seat body (1) are inserted into the grooves (15) on the bottom surface of the movable and stationary scrolls; Step S3, driving the three inner supporting claws (3) so that the three inner supporting claws (3) move away from the center of the seat body (1) and abut against the inner peripheral wall of the circular groove (14); Step S4, after releasing the gas in the inflation chamber (4), the gas in the inflation chamber (4) is extracted again, so that the three outer claws (2) move downward and the three outer claws (2) rotate back toward the center of the seat body (1) until the three outer claws (2) are engaged in the grooves (16) on the outer edges of the moving and stationary scrolls; Step S5, driving the seat body (1) to perform unidirectional CNC displacement along the X-axis, driving the tool to perform unidirectional CNC displacement along the Y-axis, and the tool to cut the scroll structure on the movable and stationary scrolls; Step S6, after the milling is completed, the movable and stationary scrolls are removed from the seat body (1), and the milling effect of the movable and stationary scrolls is detected.

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