Numerical control servo system and aero-engine accessory bearing double-face simultaneous electric riveting method

Abstract

The invention discloses a numerical control servo system and an aero-engine accessory bearing double-face simultaneous electric riveting method, and belongs to the technical field of bearing manufacturing. The technical problem that the production efficiency is low due to manual operation of an operator when a headless rivet is riveted to an existing aero-engine accessory bearing is solved, based on a numerical control servo system, two half retainers are assembled on the bearing, the rivet is installed on the bearing, and the bearing is installed on a bearing seat on the upper portion of a base; the two assembled half retainers are positioned, and a first electric riveting punch and a second electric riveting punch are driven to electrically rivet the upper end and the lower end of a rivet at the same time; and the first electric riveting punch and the second electric riveting punch are driven to reset, the base is rotated, the two assembled half retainers are positioned again, and the first electric riveting punch and the second electric riveting punch are driven to electrically rivet the upper end and the lower end of the next rivet at the same time. And the assembly quality and efficiency are improved. The quick riveting device is used for quick riveting of aero-engine accessory bearings.

Description

TECHNICAL FIELD

[0001] The application relates to a numerical control servo system and a double-face simultaneous electric riveting method for an aero-engine accessory bearing, and belongs to the technical field of bearing manufacturing. BACKGROUND

[0002] The aero-engine accessory bearing is usually of a half-retainer structure, and the two halves of the retainer need to be riveted into one body during bearing assembly. At present, the riveting of headless rivets is performed in the following way: the bearing after rivet and retainer assembly is placed on a first-face concave ring riveting jig, and the lower end of the rivet rod is brought into full contact with the concave surface before electric riveting; after the first-face riveting is completed, the bearing is turned over, and the end of the rivet head formed by the first-face riveting is placed on a second-face electric riveting jig to sequentially complete the second-face electric riveting. The electric riveting method has been a manual electric riveting process, which is completed by hand and foot cooperation, and the operation process has a high skill requirement for personnel. The riveting stroke, pressure and positioning parameters vary with the personnel's feeling factors, and the uncertainty is increased, the product quality consistency is low, the manual riveting labor intensity is high, and the production efficiency is low. Moreover, the rivet in the concave ring is deformed due to heating during the first-face riveting, and the deformation is particularly obvious when thin rivets are processed.

[0003] In summary, the existing aero-engine accessory bearing riveting headless rivets has the technical problem of low production efficiency due to manual operation by the operator. SUMMARY

[0004] The application is to solve the technical problem of low production efficiency due to manual operation by the operator during the existing aero-engine accessory bearing riveting headless rivets, and further provides a numerical control servo system, which comprises a first servo motor, a second servo motor, a third servo motor, a first screw guide rail, a second screw guide rail, a third screw guide rail, a first punch seat, a second punch seat, a first electric riveting punch, a second electric riveting punch and a base. The first servo motor is fixedly arranged in a vertical downward direction, the second servo motor is fixedly arranged in a vertical upward direction, the first screw guide rail is installed on the lower side of the first servo motor, the second screw guide rail is installed on the upper side of the second servo motor, the first punch seat is sleeved on the outer side of the first screw guide rail, the second punch seat is sleeved on the outer side of the second screw guide rail, the bottom of the first punch seat is provided with the first electric riveting punch, the top of the second punch seat is provided with the second electric riveting punch, the first electric riveting punch and the second electric riveting punch are coaxial in the vertical direction, the third servo motor is fixedly arranged in a horizontal direction, the third screw guide rail is installed on the right side of the third servo motor, the base is installed on the upper side of the third screw guide rail, the upper part of the base is provided with a bearing seat, the bearing seat is provided with an external bearing, the external bearing is internally assembled with two halves of a retainer, the two halves of the retainer are provided with a plurality of rivets, and the first electric riveting punch and the second electric riveting punch are used to simultaneously electrically rivet the upper and lower ends of one rivet.

[0005] As another improvement of the present application, it further comprises a PLC controller, which is electrically connected with the first servo motor, the second servo motor, the third servo motor, the first screw guide rail, the second screw guide rail, the third screw guide rail, the first electric riveting punch, the second electric riveting punch and the base respectively.

[0006] As another improvement of the present application, the bearing seat is rotatably connected to the upper portion of the base.

[0007] The present application further provides a double-sided simultaneous electric riveting method for an aero-engine accessory bearing, comprising the following steps:

[0008] S1, setting parameters required by the PLC controller and inputting the parameters into the PLC controller;

[0009] S2, assembling the two half retainers on the bearing and installing the rivets, and installing the bearing on the bearing seat of the upper portion of the base;

[0010] S3, starting the PLC controller, positioning the assembled two half retainers, and driving the first electric riveting punch and the second electric riveting punch to simultaneously electric rivet the upper and lower ends of one rivet;

[0011] S4, driving the first electric riveting punch and the second electric riveting punch to reset, rotating the base, repositioning the assembled two half retainers, and driving the first electric riveting punch and the second electric riveting punch to simultaneously electric rivet the upper and lower ends of the next rivet;

[0012] S5, repeatedly performing step S4 until the electric riveting of all rivets is completed.

[0013] As another improvement of the present application, the parameters in step S1 include the displacement amount of the first electric riveting punch and the displacement amount of the second electric riveting punch calculated according to the width of the retainer and the length of the rivet.

[0014] As another improvement of the present application, step S1 further comprises setting the displacement speed parameter of the first electric riveting punch, the displacement speed parameter of the second electric riveting punch, the electric conduction time parameter of the first electric riveting punch, the electric conduction time parameter of the second electric riveting punch, the electric conduction current parameter of the first electric riveting punch, the electric conduction current parameter of the second electric riveting punch and the horizontal position parameter of the base.

[0015] As another improvement of the present application, step S1 further comprises inputting the displacement speed parameter of the first electric riveting punch, the displacement speed parameter of the second electric riveting punch, the electric conduction time parameter of the first electric riveting punch, the electric conduction time parameter of the second electric riveting punch, the electric conduction current parameter of the first electric riveting punch, the electric conduction current parameter of the second electric riveting punch and the horizontal position parameter of the base into the PLC controller.

[0016] As another improvement of the present application, in step S3, the horizontal positioning of the external bearing is realized by horizontal translation of the base and horizontal rotation of the bearing seat, and then the assembled two half retainers are positioned.

[0017] The present application has the following advantages:

[0018] 1. The numerical control servo system is simple in structure, compact and convenient to operate.

[0019] 2. The double-sided simultaneous riveting method of the aero-engine accessory bearing can realize rapid riveting of the aero-engine accessory bearing, and the processing efficiency is expected to be improved by 2 times, and the problem of poor consistency is fully solved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic diagram of the numerical control servo system. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the examples of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments of the present application. Based on the embodiments of the present application, all the embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application. In the description of the present application, it should be clarified that the positions indicated by the terms "upper", "lower", "left", "right", "first", "second" and the like are only the positional relationship based on the orientation shown in the drawings, and are only for the convenience of describing the present application, and cannot be understood as indicating or implying that the indicated parts have a specific orientation, are constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0022] Specific implementation method one: combined with Figure 1The embodiment is described, and the embodiment provides a numerical control servo system, which comprises a first servo motor 1, a second servo motor 2, a third servo motor 3, a first screw guide rail 4, a second screw guide rail 5, a third screw guide rail 6, a first punch base 7, a second punch base 8, a first electric riveting punch 9, a second electric riveting punch 10 and a base 11, the first servo motor 1 is fixedly arranged in a vertical downward direction, the second servo motor 2 is fixedly arranged in a vertical upward direction, the first screw guide rail 4 is installed on the lower side of the first servo motor 1 and connected with the output end of the first servo motor, the second screw guide rail 5 is installed on the upper side of the second servo motor 2 and connected with the output end of the second servo motor, the first punch base 7 is sleeved on the outer side of the first screw guide rail 4, the second punch base 8 is sleeved on the outer side of the second screw guide rail 5, the first electric riveting punch 9 is installed on the bottom of the first punch base 7, the second electric riveting punch 10 is installed on the top of the second punch base 8, the first electric riveting punch 9 and the second electric riveting punch 10 are coaxial in the vertical direction, the third servo motor 3 is fixedly arranged in a horizontal direction, the third screw guide rail 6 is installed on the right side of the third servo motor 3 and connected with the output end of the third servo motor, the base 11 is installed on the upper side of the third screw guide rail 6, the upper part of the base 11 is provided with a bearing seat, an external bearing 12 is installed on the bearing seat, two half retainer rings are assembled in the external bearing 12, a plurality of rivets 13 are installed on the two half retainer rings, and the first electric riveting punch 9 and the second electric riveting punch 10 are used to realize electric riveting of the upper and lower ends of a rivet 13 at the same time. The structure is simple, compact and convenient to operate.

[0023] Specific embodiment two: combined Figure 1 The embodiment is described, and the embodiment is different from the specific embodiment one in that the embodiment further comprises a PLC controller, the PLC controller is electrically connected with the first servo motor 1, the second servo motor 2, the third servo motor 3, the first screw guide rail 4, the second screw guide rail 5, the third screw guide rail 6, the first electric riveting punch 9, the second electric riveting punch 10 and the base 11. In this way, the structure is simple, compact and convenient to operate. The other components and connection modes are the same as those in the specific embodiment one.

[0024] Specific embodiment three: combined Figure 1 The embodiment is described, and the embodiment is different from the specific embodiment one in that the bearing seat is rotatably connected to the upper part of the base 11. The rotation position of the two half retainer rings is adjusted through the bearing seat. First, the displacement amount of the electric riveting punch is calculated according to the width of the retainer ring and the length of the rivet, the displacement amount and the displacement speed are input to the PLC controller, and the parameters such as the electrification time, the electrification current and the horizontal position of the base are adjusted.

[0025] Furthermore, the mounted bearing is placed on the bearing housing, which can move horizontally and rotate. Pressing the start button causes the bearing housing to move the bearing to the riveting position.

[0026] Furthermore, the upper and lower electric riveting punches are fixed to the punch holder, which is connected to the lead screw guide rail. A servo motor drives the punch holder to move vertically, bringing the electric riveting punches into contact with the rivet according to input parameters. At this point, riveting is energized. Once the rivet heats up and turns red-hot, the upper and lower electric riveting punches, under the action of the servo motor, rapidly and simultaneously press down and push up, achieving simultaneous double-sided electric riveting. After riveting one rivet, the riveting punch automatically rises and falls, and the base drives the bearing to rotate automatically, positioning the next unclamped rivet at the center of the electric riveting punch. This riveting action is repeated to complete the bearing riveting. This embodiment has a simple and compact structure, making it easy to operate. Using this CNC servo system can improve the quality and efficiency of bearing assembly, saving time and effort, and is suitable for large-scale promotion. Other components and connection methods are the same as in specific embodiment one.

[0027] Specific implementation method four: Combination Figure 1 This embodiment describes a method for simultaneous double-sided electric riveting of an aero-engine accessory bearing. It is based on a numerical control servo system as described in Embodiment 3 and includes the following steps:

[0028] S1. Set the required parameters for the PLC controller and input the parameters into the PLC controller;

[0029] S2. Assemble the two halves of the cage on the bearing 12 and install the rivets 13, and install the bearing 12 on the bearing seat on the upper part of the base 11.

[0030] S3. Start the PLC controller, position the assembled two halves of the retainer, and drive the first electric riveting punch 9 and the second electric riveting punch 10 to simultaneously rivet the upper and lower ends of a rivet 13.

[0031] S4. Drive the first electric riveting punch 9 and the second electric riveting punch 10 to reset, rotate the base 11, reposition the assembled two halves of the retainer, and drive the first electric riveting punch 9 and the second electric riveting punch 10 to simultaneously rivet the upper and lower ends of the next rivet 13.

[0032] S5. Repeat step S4 until all rivets 13 are electrically riveted.

[0033] This system will enable rapid riveting of aero-engine accessory bearings, with a projected increase in processing efficiency of 2 times. It will also effectively solve the problem of poor consistency. The system has a simple structure and is easy to operate, making it suitable for application in the riveting process of bearings with similar structures.

[0034] Specific Implementation Method Five: Combining Figure 1The embodiment is described, and the parameters in step S1 include calculating the displacement of the first electric riveting punch 9 and the displacement of the second electric riveting punch 10 according to the width of the cage and the length of the rivet 13. The design can ensure the riveting effect of the electric riveting punch.

[0035] Specific embodiment six: in combination Figure 1 The embodiment is described, and step S1 further includes setting the displacement speed parameter of the first electric riveting punch 9, the displacement speed parameter of the second electric riveting punch 10, the power-on time parameter of the first electric riveting punch 9, the power-on time parameter of the second electric riveting punch 10, the power-on current parameter of the first electric riveting punch 9, the power-on current parameter of the second electric riveting punch 10, and the horizontal position parameter of the base 11. The design can ensure the riveting effect of the electric riveting punch.

[0036] Specific embodiment seven: in combination Figure 1 The embodiment is described, and step S1 further includes inputting the displacement speed parameter of the first electric riveting punch 9, the displacement speed parameter of the second electric riveting punch 10, the power-on time parameter of the first electric riveting punch 9, the power-on time parameter of the second electric riveting punch 10, the power-on current parameter of the first electric riveting punch 9, the power-on current parameter of the second electric riveting punch 10, and the horizontal position parameter of the base 11 into the PLC controller. The design can improve the degree of automation control and improve efficiency.

[0037] Specific embodiment eight: in combination Figure 1 The embodiment is described, and in step S3, the horizontal positioning external bearing 12 is realized by the horizontal translation of the base 11 and the horizontal rotation of the bearing seat, and then the two assembled half cages are positioned.

[0038] The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A numerical control servo system, characterized in that... It includes a first servo motor (1), a second servo motor (2), a third servo motor (3), a first lead screw guide rail (4), a second lead screw guide rail (5), a third lead screw guide rail (6), a first punch holder (7), a second punch holder (8), a first electric riveting punch (9), a second electric riveting punch (10), and a base (11). The first servo motor (1) is fixedly installed in the vertically downward direction, and the second servo motor (2) is fixedly installed in the vertically upward direction. The first lead screw guide rail (4) is installed on the lower side of the first servo motor (1), and the second lead screw guide rail (5) is installed on the upper side of the second servo motor (2). The first punch holder (7) is fitted on the outside of the first lead screw guide rail (4), and the second punch holder (8) is fitted on the outside of the second lead screw guide rail (5). The bottom of the first electric riveting punch (9) is installed, and the top of the second punch seat (8) is installed with the second electric riveting punch (10). The first electric riveting punch (9) and the second electric riveting punch (10) are coaxial in the vertical direction. The third servo motor (3) is fixed in the horizontal direction. The third lead screw guide (6) is installed on the right side of the third servo motor (3). The base (11) is installed on the upper side of the third lead screw guide (6). The upper part of the base (11) is equipped with a bearing seat. An external bearing (12) is installed on the bearing seat. Two half cages are assembled inside the external bearing (12). Multiple rivets (13) are installed on the two half cages. The first electric riveting punch (9) and the second electric riveting punch (10) can simultaneously rivet the upper and lower ends of a rivet (13).

2. The CNC servo system according to claim 1, characterized in that, It also includes a PLC controller, which is electrically connected to the first servo motor (1), the second servo motor (2), the third servo motor (3), the first lead screw guide (4), the second lead screw guide (5), the third lead screw guide (6), the first electric riveting punch (9), the second electric riveting punch (10), and the base (11).

3. The CNC servo system according to claim 1, characterized in that, The bearing housing is rotatably connected to the upper part of the base (11).

4. A method for simultaneous double-sided electric riveting of an aero-engine accessory bearing, characterized in that... It is based on a numerical control servo system as described in claim 3, and includes the following steps: S1. Set the required parameters for the PLC controller and input the parameters into the PLC controller; S2. Assemble the two halves of the cage on the bearing (12) and install the rivets (13), and install the bearing (12) on the bearing seat on the upper part of the base (11); S3. Start the PLC controller, position the assembled two halves of the retainer, and drive the first electric riveting punch (9) and the second electric riveting punch (10) to simultaneously rivet the upper and lower ends of a rivet (13). S4. Drive the first electric riveting punch (9) and the second electric riveting punch (10) to reset, rotate the base (11), reposition the assembled two halves of the retainer, and drive the first electric riveting punch (9) and the second electric riveting punch (10) to simultaneously rivet the upper and lower ends of the next rivet (13). S5. Repeat step S4 until all rivets (13) are electrically riveted.

5. A method for simultaneous double-sided electric riveting of an aero-engine accessory bearing according to claim 4, characterized in that, The parameters in step S1 include the displacement of the first electric riveting punch (9) and the displacement of the second electric riveting punch (10) calculated based on the width of the retainer and the length of the rivet (13).

6. The method for simultaneous double-sided electric riveting of an aero-engine accessory bearing according to claim 4, characterized in that, Step S1 also includes setting the displacement speed parameters of the first electric riveting punch (9), the displacement speed parameters of the second electric riveting punch (10), the energizing time parameters of the first electric riveting punch (9), the energizing time parameters of the second electric riveting punch (10), the energizing current parameters of the first electric riveting punch (9), the energizing current parameters of the second electric riveting punch (10), and the horizontal position parameters of the base (11).

7. According to claim 6, the method for simultaneous electric riveting of two sides of an aero-engine accessory bearing, step S1 further includes inputting the displacement speed parameters of the first electric riveting punch (9), the displacement speed parameters of the second electric riveting punch (10), the energizing time parameters of the first electric riveting punch (9), the energizing time parameters of the second electric riveting punch (10), the energizing current parameters of the first electric riveting punch (9), the energizing current parameters of the second electric riveting punch (10), and the horizontal position parameters of the base (11) into the PLC controller.

8. A method for simultaneous double-sided electric riveting of an aero-engine accessory bearing according to claim 4, characterized in that, In step S3, the external bearing (12) is horizontally positioned by the horizontal lateral movement of the base (11) and the horizontal rotation of the bearing seat, thereby achieving the positioning and assembly of the two halves of the cage.

Images