Rotary part automatic alignment method suitable for horizontal lathe equipment

Abstract

The invention discloses a rotary part automatic alignment method suitable for horizontal lathe equipment. The rotary part automatic alignment method comprises the steps that a zero point positioning system, a clamping center adjustable three-jaw chuck, a digital dial indicator and an internal hexagonal wrench are prepared to serve as alignment tools; in an automatic production line preparation area, assembling the part, a three-jaw chuck and a zero-point positioning system sub-disc to form an assembly, transferring the assembly to a turning station through a robot, and locking and fixing the zero-point positioning system to realize rough alignment; and measuring the positioning precision of the rotary part by using a digital dial indicator, if the precision requirement is met, ending the automatic alignment process, and if the precision requirement is not met, finely adjusting the clamping center of the three-jaw chuck by using an internal hexagonal wrench until the positioning precision of the rotary part meets the requirement. The alignment process does not need manual assistance, full-automatic rough alignment and fine alignment can be achieved, the proficiency and skill level of an operator are not relied on any more, the fine alignment working efficiency and the final precision are stable and controllable, and the technical requirements of an automatic production line are met.

Description

Technical Field

[0001] The invention belongs to the technical field of manufacturing parts of aviation engines, and in particular relates to an automatic alignment method for rotary parts suitable for horizontal lathe equipment. Background Art

[0002] In the manufacturing process of aircraft engine parts, turning of rotating parts is inevitable. Some types of rotating parts have very strict requirements on turning accuracy, and generally need to meet micron-level requirements.

[0003] At present, in order to achieve the micron-level turning accuracy requirements, it is necessary to ensure it through the alignment process before turning. However, the current alignment process still needs to be completed with manual assistance, and automatic alignment without manual assistance cannot be achieved.

[0004] Specifically, after the workpiece is clamped and fixed on the traditional three-jaw chuck of the lathe spindle, only rough alignment can be achieved initially by relying on the centering function of the three-jaw chuck. Subsequently, it is necessary to manually calibrate the workpiece with the help of gaskets for dynamic fine-tuning. The process of fine alignment is heavily dependent on the proficiency and skill level of the operator, and the work efficiency and final accuracy of the fine alignment are difficult to achieve stable and controllable.

[0005] In addition, more and more aircraft engine parts have been upgraded to be produced by automated production lines, so there is an urgent need for rotary parts to be produced by automated production lines. However, the alignment process before turning is still restricted by manual auxiliary factors, which makes it unable to meet the basic technical requirements of automated production lines, making the turning of rotary parts a weak link in the automated production of aircraft engine parts. Summary of the invention

[0006] In view of the problems existing in the prior art, the present invention provides an automatic alignment method for rotating parts suitable for horizontal lathe equipment. The alignment process before turning completely eliminates the manual assistance link. After the workpiece is clamped on the three-jaw chuck of the lathe spindle, fully automatic rough alignment and fine alignment can be achieved. It no longer depends on the proficiency and skill level of the operator, and the work efficiency and final accuracy of the fine alignment are also stable and controllable, thereby meeting the basic technical requirements of the automated production line and filling the short board link in the automated production of aircraft engine parts.

[0007] In order to achieve the above object, the present invention adopts the following technical solution: a method for automatically aligning rotating parts suitable for horizontal lathe equipment, comprising the following steps:

[0008] Step 1: Prepare the alignment tools

[0009] ①. Prepare a zero-point positioning system and fix the zero-point positioning system master plate to the lathe spindle;

[0010] ② Prepare a three-jaw chuck with adjustable clamping center, and fix the zero point positioning system sub-disk and the three-jaw chuck with adjustable clamping center together;

[0011] ③. Prepare a digital micrometer, install it on the automatic tool changer of the lathe, and connect the data output end of the digital micrometer to the CNC system of the lathe;

[0012] ④. Prepare an Allen wrench and install it on the boring and drilling arm of the lathe;

[0013] Step 2: Place the assembly of the zero-point positioning system sub-disk and the adjustable three-jaw chuck in the clamping center in the preparation area of ​​the automated production line, and manually clamp the rotary parts to be turned onto the adjustable three-jaw chuck in the clamping center;

[0014] Step 3: The robot transfers the assembly of the zero-point positioning system sub-disc with the rotating parts clamped thereon and the three-jaw chuck with adjustable clamping center from the preparation area of ​​the automated production line to the turning station of the automated production line, and then places the zero-point positioning system sub-disc against the zero-point positioning system master disc;

[0015] Step 4: Start the pneumatic locking function of the zero-point positioning system, and lock and fix the zero-point positioning system sub-disc and the zero-point positioning system mother disc together. At this time, the rotary parts are roughly aligned on the lathe spindle through the locking and fixing of the zero-point positioning system;

[0016] Step 5: Move the automatic tool changer of the lathe so that the measuring head of the digital micrometer is against the outer surface of the rotating part, and then return the reading of the digital micrometer to zero;

[0017] Step 6: Start the lathe spindle and drive the rotating parts to rotate at a speed of 30 rpm to 100 rpm. After the rotating parts rotate one circle, directly measure the concentricity of the rotating parts relative to the machine tool spindle through the digital micrometer. If the concentricity measured by the digital micrometer directly meets the accuracy requirement, proceed to step 8; if the concentricity measured by the digital micrometer does not meet the accuracy requirement, proceed to step 7.

[0018] Step 7: Start the boring and drilling processing arm, and use the hexagonal wrench to correspondingly tighten the three sets of centering adjustment bolts distributed tangentially on the three-jaw chuck with adjustable clamping center, and then fine-tune the clamping center of the three-jaw chuck with adjustable clamping center, and then control the rotary part to rotate one circle again. If the concentricity measured by the digital micrometer meets the accuracy requirement, execute step 8; if the concentricity measured by the digital micrometer still does not meet the accuracy requirement, repeat step 7 until the accuracy requirement is met;

[0019] Step 8: The boring and drilling arm is reset with the hexagonal wrench, and the automatic tool changer is reset with the digital micrometer, and the automatic alignment process of the rotary parts is completed.

[0020] Beneficial effects of the present invention:

[0021] The automatic alignment method for rotary parts of horizontal lathe equipment of the present invention completely eliminates the manual assistance link in the alignment process before turning processing. After the workpiece is clamped on the three-jaw chuck of the lathe spindle, fully automatic rough alignment and fine alignment can be achieved, which is no longer dependent on the proficiency and skill level of the operator, and the work efficiency and final accuracy of the fine alignment are also stable and controllable, thereby meeting the basic technical requirements of the automated production line and completing the short board link of the automated production of aircraft engine parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram for automatic alignment of rotating parts;

[0023] In the figure, 1 is the mother disk of the zero-point positioning system, 2 is the three-jaw chuck with adjustable clamping center, 3 is the daughter disk of the zero-point positioning system, 4 is the automatic tool changer, 5 is the digital micrometer, 6 is the hexagonal wrench, 7 is the rotating part, and 8 is the boring and drilling processing arm. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] A method for automatically aligning rotating parts suitable for horizontal lathe equipment comprises the following steps:

[0026] Step 1: Prepare the alignment tools

[0027] ①. Prepare a zero point positioning system and fix the zero point positioning system master plate 1 to the lathe spindle;

[0028] In this embodiment, the positioning error of the zero-point positioning system is 0.015 mm to 0.03 mm;

[0029] ②. Prepare a three-jaw chuck 2 with adjustable clamping center, and fix the zero point positioning system sub-disk 3 and the three-jaw chuck 2 with adjustable clamping center together;

[0030] In this embodiment, the model of the three-jaw chuck 2 with adjustable clamping center is ZS Hi-Tru, and the concentricity between the clamping center of the three-jaw chuck 2 with adjustable clamping center and the center of the machine tool spindle can be adjusted to a maximum of 0.001 mm;

[0031] ③. Prepare a digital micrometer 5, install the digital micrometer 5 on the automatic tool changer 4 of the lathe, and connect the data output end of the digital micrometer 5 to the CNC system of the lathe;

[0032] ④. Prepare an Allen wrench 6 and install the Allen wrench 6 on the boring and drilling arm 8 of the lathe;

[0033] In this embodiment, the joint form of the hexagonal wrench 6 is manufactured according to the joint form of the drill tool and the boring tool rod that are compatible with the boring and drilling processing arm 8;

[0034] Step 2: Place the assembly of the zero-point positioning system sub-disk 3 and the clamping center adjustable three-jaw chuck 2 in the preparation area of ​​the automated production line, and manually clamp the rotary parts 7 to be turned onto the clamping center adjustable three-jaw chuck 2;

[0035] Step 3: The robot transfers the assembly of the zero-point positioning system sub-disk 3 clamping the rotary part 7 and the three-jaw chuck 2 with adjustable clamping center from the preparation area of ​​the automated production line to the turning station of the automated production line, and then places the zero-point positioning system sub-disk 3 against the zero-point positioning system master disk 1;

[0036] Step 4: Start the pneumatic locking function of the zero-point positioning system, and lock and fix the zero-point positioning system sub-disc 3 and the zero-point positioning system mother disc 1 together. At this time, the rotary part 7 is roughly aligned on the lathe spindle through the locking and fixing of the zero-point positioning system;

[0037] In this embodiment, the accuracy of the rough alignment is guaranteed by the positioning accuracy of the zero point positioning system itself, so the accuracy of the rough alignment is not higher than 0.03mm;

[0038] Step 5: Move the automatic tool changer 4 of the lathe so that the measuring head of the digital micrometer 5 is against the outer surface of the rotating part 7, and then return the reading of the digital micrometer 5 to zero;

[0039] Step 6: Start the lathe spindle and drive the rotating part 7 to rotate at a speed of 50 rpm. After the rotating part 7 rotates one circle, the concentricity of the rotating part 7 relative to the machine tool spindle is directly measured by the digital micrometer 5, such as Figure 1 As shown; if the concentricity measured by the digital micrometer 5 directly meets the accuracy requirement, execute step eight; if the concentricity measured by the digital micrometer 5 does not meet the accuracy requirement, execute step seven;

[0040] Step 7: Start the boring and drilling processing arm 8, use the hexagonal wrench 6 to correspondingly screw the three sets of centering adjustment bolts tangentially distributed on the clamping center adjustable three-jaw chuck 2, and then fine-tune the clamping center of the clamping center adjustable three-jaw chuck 2, and then control the rotary part 7 to rotate one circle again. If the concentricity measured by the digital micrometer 5 meets the accuracy requirement, execute step 8; if the concentricity measured by the digital micrometer 5 still does not meet the accuracy requirement, repeat step 7 until the accuracy requirement is met;

[0041] In this embodiment, the concentricity measured by the digital micrometer 5 needs to be no higher than 0.004 mm to be qualified;

[0042] Step 8: The boring and drilling arm 8 carrying the hexagonal wrench 6 is reset, and the automatic tool changer 4 carrying the digital micrometer 5 is reset, and the automatic alignment process of the rotary part 7 is completed.

[0043] The solutions in the embodiments are not intended to limit the protection scope of the present invention. All equivalent implementations or changes that do not deviate from the present invention are included in the protection scope of the present invention.

Claims

1. A method for automatically aligning rotating parts suitable for horizontal lathe equipment, characterized in that: The steps include: Step 1: Prepare the alignment tools ①. Prepare a zero-point positioning system and fix the zero-point positioning system master plate to the lathe spindle; ② Prepare a three-jaw chuck with adjustable clamping center, and fix the zero point positioning system sub-disk and the three-jaw chuck with adjustable clamping center together; ③. Prepare a digital micrometer, install it on the automatic tool changer of the lathe, and connect the data output end of the digital micrometer to the CNC system of the lathe; ④. Prepare an Allen wrench and install it on the boring and drilling arm of the lathe; Step 2: Place the assembly of the zero-point positioning system sub-disk and the adjustable three-jaw chuck in the clamping center in the preparation area of ​​the automated production line, and manually clamp the rotary parts to be turned onto the adjustable three-jaw chuck in the clamping center; Step 3: The robot transfers the assembly of the zero-point positioning system sub-disc with the rotating parts clamped thereon and the three-jaw chuck with adjustable clamping center from the preparation area of ​​the automated production line to the turning station of the automated production line, and then places the zero-point positioning system sub-disc against the zero-point positioning system master disc; Step 4: Start the pneumatic locking function of the zero-point positioning system, and lock and fix the zero-point positioning system sub-disc and the zero-point positioning system mother disc together. At this time, the rotary parts are roughly aligned on the lathe spindle through the locking and fixing of the zero-point positioning system; Step 5: Move the automatic tool changer of the lathe so that the measuring head of the digital micrometer is against the outer surface of the rotating part, and then return the reading of the digital micrometer to zero; Step 6: Start the lathe spindle and drive the rotating parts to rotate at a speed of 30 rpm to 100 rpm. After the rotating parts rotate one circle, directly measure the concentricity of the rotating parts relative to the machine tool spindle through the digital micrometer. If the concentricity measured by the digital micrometer directly meets the accuracy requirement, proceed to step 8; if the concentricity measured by the digital micrometer does not meet the accuracy requirement, proceed to step 7. Step 7: Start the boring and drilling processing arm, and use the hexagonal wrench to correspondingly tighten the three sets of centering adjustment bolts distributed tangentially on the three-jaw chuck with adjustable clamping center, and then fine-tune the clamping center of the three-jaw chuck with adjustable clamping center, and then control the rotary part to rotate one circle again. If the concentricity measured by the digital micrometer meets the accuracy requirement, execute step 8; if the concentricity measured by the digital micrometer still does not meet the accuracy requirement, repeat step 7 until the accuracy requirement is met; Step 8: The boring and drilling arm is reset with the hexagonal wrench, and the automatic tool changer is reset with the digital micrometer, and the automatic alignment process of the rotary parts is completed.

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