A high-precision centering and aligning device and method for offline centering of a rotary body part

Abstract

The application provides a kind of off-line centering high-precision alignment device and method for rotary body parts, which solves the problem of quickly and accurately aligning the rotary center of rotary body parts off the flexible processing production line.The device includes a vernier, a dial indicator, a calibration block, a rotating column, a heightening column, and a trapezoidal positioning rack.The rotating column is rotatably connected to the top of the heightening column.The trapezoidal positioning rack is fixedly connected to the rotating column.The vernier is engaged with the trapezoidal positioning rack.The calibration block is located at the head end of the vernier.Both the trapezoidal positioning rack and the vernier are located in the slot on the upper end of the rotating column.The end face of the slot on the upper end of the rotating column is marked with a scale line.The head of the vernier is provided with a protrusion, and a horizontal small hole is opened in the protrusion for the head of the dial indicator to pass through.The method includes the following steps: processing the reference hole;calibrating the rotating alignment device;rotary alignment;checking the coaxiality after clamping is completed.The application can quickly and accurately align the rotary center of the parts, and adopts modular design.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of off-line centering high-precision alignment device and method of rotary body parts, it is a kind of method for the centering alignment of parts outside equipment, it is applicable to the rotary center reference alignment of rotary body parts on exchangeable pallet without the aid of machine tool, outside equipment is carried out. BACKGROUND

[0002] With the development and construction of flexible processing production line, batch parts on-line non-intervention processing need to solve the technical difficulties of part offline alignment, among them, for rotary body parts, the rotary center of parts needs to be aligned, i.e. when clamping parts, the axis of the part coincides with the rotary axis of the pallet. In the machine tool industry, the common technical means is to make special tooling, special positioning elements or develop special alignment equipment, based on the current situation of the industry, the present application provides a low-cost, high versatility off-line alignment method for rotary body parts. SUMMARY

[0003] The present application provides a kind of off-line centering high-precision alignment device and method of rotary body parts, solves the problem of quickly and accurately aligning the rotary center of rotary body parts outside flexible processing production line.

[0004] The present application is realized by the following technical solutions:

[0005] An off-line centering high-precision alignment device for rotary body parts is a rotary alignment device, which comprises a vernier 3.01, a dial indicator 3.02, a calibration block 3.03, a rotating column 3.05, a heightening column 3.06, and a trapezoidal positioning rack 3.10. The bottom of the heightening column 3.06 has a column body matched with the hole of the pallet 2. The rotating column 3.05 is rotatably connected to the top of the heightening column 3.06. The trapezoidal positioning rack 3.10 is connected with the rotating column 3.05 through fastening screw c3.09 and positioning pin 3.08. The trapezoidal teeth at the bottom of the vernier 3.01 are engaged with the trapezoidal teeth at the top of the trapezoidal positioning rack 3.10. The calibration block 3.03 is located at the head end of the vernier 3.01 and is connected with the trapezoidal positioning rack 3.10 through fastening screw b3.07. The trapezoidal positioning rack 3.10 and the vernier 3.01 are both located in the slot at the upper end of the rotating column 3.05. The end face of the slot side at the upper end of the rotating column 3.05 is marked with a 0 line. The locking screw a3.04 passes through the slot side wall of the rotating column 3.05 to lock the vernier 3.01. The head of the vernier 3.01 is provided with a protrusion, and a horizontal small hole is opened in the protrusion for the head of the dial indicator 3.02 to pass through. The locking screw d3.11 passes through the protrusion of the head of the vernier 3.01 to lock the dial indicator 3.02.

[0006] Different heightening columns 3.06 or different size heightening columns 3.06 splicing and different length verniers form modular components.

[0007] The trapezoidal tooth pitch is 4mm; a dial indicator can be replaced with a micrometer.

[0008] A high-precision offline centering and alignment device for rotating parts includes the following steps:

[0009] 1) Machining alignment reference holes: At the corner of pallet 4, with the rotation center of pallet 2 as the reference, machine 4 alignment reference holes 4;

[0010] 2) Calibration of rotary alignment device 3: Align the vernier scale 3.01 with the 0 mark on the rotating column 3.05, engage the trapezoidal teeth at the bottom of the vernier scale with the trapezoidal teeth at the top of the trapezoidal positioning rack 3.10, and tighten the locking screw a3.04; loosen the locking screw d3.11, adjust the position of the dial indicator 3.02 so that its head contacts the calibration stop 3.03, tighten the locking screw d3.11, and zero the dial of the dial indicator 3.02; repeat the above actions to calibrate all 4 rotary alignment devices 3, ensuring that the readings of the 4 dial indicators are consistent and all are zero;

[0011] 3) Rotary Alignment: Remove the calibration stop 3.03 from the four calibrated rotary alignment devices 3 and install them on the alignment reference hole 4 at the tray 4; loosen the locking screw a3.04, adjust the position of the vernier scale 3.01 so that the head of the dial indicator 3.02 contacts the surface of the part; find the maximum value of the dial indicator 3.02 by rotating the rotating column 3.05 and record it; adjust the position of the part until the vernier scale on the four rotary alignment devices 3 is completely consistent with the maximum value of the dial indicator reading, which indicates that the rotation axis of the part is coaxial with the rotation axis of the tray, and the centering and alignment of the part is completed.

[0012] 4) Clamp and secure the parts. When clamping, check the dial indicator at 3.02. After clamping, check the coaxiality again.

[0013] This invention utilizes a rotary alignment device, manufactured with alignment reference holes machined on a pallet, and combined with an alignment process technology, to quickly and accurately align the rotation center of a part on the pallet without the need for machine tools or other specialized equipment. Furthermore, the rotary alignment device employs a modular component design, allowing for the alignment of parts of different sizes by replacing modules of varying specifications. Attached Figure Description

[0014] Figure 1 Alignment diagram. In the diagram, 1 is a rotating part, 2 is a tray, 3 is a rotary alignment device, and 4 is an alignment reference hole.

[0015] Figure 2Schematic diagram of rotary alignment device. In the diagram, 3.01 vernier caliper, 3.02 dial indicator (range 8mm, accuracy 0.01mm), 3.03 calibration stop, 3.04 locking screw a, 3.05 rotating column, and 3.06 shim column.

[0016] Figure 3 Top view of the rotary alignment device;

[0017] Figure 4 A cross-sectional view of the rotary alignment device, i.e. Figure 3 BB sectional view, in the figure, 3.07 fastening screw b, 3.08 locating pin, 3.09 fastening screw c, 3.10 trapezoidal locating rack, 3.11 locking screw d;

[0018] Figure 5 Figure 4 A partial sectional view along line C;

[0019] Figure 6 Schematic diagram of rotational alignment;

[0020] Figure 7 Schematic diagram of rotating column alignment;

[0021] Figure 8 Schematic diagram of modular raised column and vernier caliper. Detailed Implementation

[0022] This invention proposes a high-precision offline centering and alignment device and method for rotating parts, the specific implementation of which is as follows:

[0023] 1. As attached Figure 1 The diagram shows a rotary part 1 on tray 2, and the positions of the rotary alignment device 3 and the alignment reference hole 4. The alignment requirements for the part are: the rotation axis of the part needs to coincide with the rotation axis of the tray below, and the coaxiality is no greater than 0.02mm.

[0024] 2. Machining the alignment reference holes. (See attached image) Figure 1 As shown, four alignment reference holes 4 are machined at the corner of pallet 4, with the rotation center of pallet 2 as the reference.

[0025] 3. Calibration of rotary alignment device 3. (See attached document) Figure 2 , 3As shown in Figures 4 and 5, align the vernier scale 3.01 with the zero mark on the rotating column 3.05, and engage the trapezoidal teeth at the bottom of the vernier scale with the trapezoidal teeth at the top of the trapezoidal positioning rack 3.10. Tighten the locking screw a3.04. Loosen the locking screw d3.11, adjust the position of the dial indicator 3.02 so that its head contacts the calibration stop 3.03, tighten the locking screw d3.11, and zero the dial of the dial indicator 3.02. Repeat the above actions to calibrate all four sets of rotary alignment devices 3, ensuring that the readings of the four dial indicators are consistent and all are zeroed.

[0026] 4. Rotate to align. (See attached image) Figure 6 As shown, remove the calibration stop 3.03 from the four calibrated rotary alignment devices 3; and install them on the alignment reference hole at tray 4; loosen the locking screw a3.04, adjust the position of the vernier caliper 3.01, so that the dial indicator 3.02 head contacts the surface of the part; as shown in the attached... Figure 7 As shown, the maximum reading of dial indicator 3.02 is found and recorded by rotating the rotating column 3.05; the position of the part is adjusted until the vernier scale on the four sets of rotary alignment devices 3 is completely consistent with the maximum reading of the dial indicator (the deviation of the maximum reading of the dial indicator is not greater than 0.02mm), which indicates that the rotation axis of the part is coaxial with the rotation axis of the tray, and the centering and alignment of the part is completed.

[0027] 5. Clamp and secure the parts. When clamping, check the dial indicator at 3.02. After clamping, check the coaxiality again.

[0028] This invention has the following advantages over traditional alignment methods:

[0029] 1) High precision. The rotary alignment device in this invention uses a high-precision trapezoidal tooth meshing for vernier scale positioning (as shown in the attached diagram). Figure 5 As shown, the trapezoidal teeth have a pitch of 4mm, providing high positioning accuracy. Measurement and reading are performed using a dial indicator with an accuracy of 0.01mm. If necessary, a micrometer can also be used with an accuracy of 0.001mm.

[0030] 2) Excellent economic efficiency. The rotary alignment device in this invention adopts a split design, which is simpler in structure compared with special tooling and equipment; at the same time, the measurement method uses a dial indicator commonly used in the market, and the locking method uses standard internal hex screws, resulting in lower overall manufacturing costs and better economic efficiency.

[0031] 3) Modular design. The rotary alignment device in this invention adopts a modular component design (as shown in the attached diagram). Figure 8 As shown, using shims of different heights (3.06) or shims of different sizes can meet the alignment requirements of parts of different heights; using vernier calipers of different lengths can meet the alignment requirements of parts of different rotation diameters, demonstrating strong versatility.

Claims

1. A high-precision offline centering and alignment method for rotating parts, utilizing a rotary alignment device, characterized by: The instrument includes a vernier caliper, a dial indicator or micrometer indicator, a calibration stop, a rotating column, a shim column, and a trapezoidal positioning rack. The shim column has a column at its bottom that mates with a tray hole. The rotating column is rotatably connected to the top of the shim column. The trapezoidal positioning rack is fixedly connected to the rotating column. The trapezoidal teeth at the bottom of the vernier caliper mesh with the trapezoidal teeth at the top of the trapezoidal positioning rack. The calibration stop is located at the head end of the vernier caliper and is detachably connected to the trapezoidal positioning rack. Both the trapezoidal positioning rack and the vernier caliper are located in a groove at the upper end of the rotating column. The end face of the groove at the upper end of the rotating column is marked with graduations. Locking screw a passes through the side wall of the groove of the rotating column to lock the vernier caliper. The head of the vernier caliper has a protrusion with a small horizontal hole for the head of the dial indicator to pass through. Locking screw d passes through the protrusion at the head of the vernier caliper to lock the dial indicator. The trapezoidal positioning rack is connected to the rotating column by fastening screws c and positioning pins; The calibration stop is connected to the trapezoidal positioning rack via fastening screw b; Modular components are designed by splicing together columns of different heights or sizes and using vernier calipers of different lengths. The trapezoidal tooth pitch is 4mm; The locking screw is a standard internal hexagon screw; The method includes the following steps: 1) Machining alignment reference holes: Machining four alignment reference holes at the four corners of the pallet, using the pallet's rotation center as the reference; 2) Calibration of the rotary alignment device: Align the vernier scale with the graduations on the rotating column, engage the trapezoidal teeth at the bottom of the vernier scale with the trapezoidal teeth at the top of the trapezoidal positioning rack, and tighten the locking screw a; loosen the locking screw d, adjust the position of the dial indicator so that its head contacts the calibration stop, tighten the locking screw d, and zero the dial indicator dial; repeat the above steps to calibrate all four rotary alignment devices, ensuring that the readings of the four dial indicators are consistent and all are zero; 3) Rotary Alignment: Remove the calibration blocks from the four calibrated rotary alignment devices and install them in the four alignment reference holes on the tray; loosen the locking screw a, adjust the vernier scale position so that the dial indicator head contacts the surface of the part; find the maximum value of the dial indicator reading by rotating the rotating column and record it; adjust the position of the part until the vernier scale on the four rotary alignment devices and the maximum value of the dial indicator reading are completely consistent, which indicates that the rotation axis of the part is coaxial with the rotation axis of the tray, and the centering and alignment of the part is completed. 4) Clamp and secure the parts. Check the dial indicator while clamping, and recheck the coaxiality after clamping is complete.

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