Off-line centering high-precision alignment device and method for rotary body parts

Abstract

According to the offline centering high-precision alignment device and method for the rotary body type part, the problem that the rotary center of the rotary body type part cannot be quickly and accurately aligned in a flexible machining production line offline is solved. The device comprises a vernier scale, a dial indicator, a calibration stop 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 with the rotating column, the vernier scale is meshed with the trapezoidal positioning rack, and the calibration stop block is located at the head end of the vernier scale. The trapezoidal positioning rack and the vernier scale are both located in a groove in the upper end of the rotating column, scales are marked on the end face of the groove side of the upper end of the rotating column, the head of the vernier scale is provided with a protrusion, and the protrusion is provided with a horizontal small hole for the head of the dial indicator to penetrate through. The method comprises the following steps: machining an alignment reference hole; calibrating the rotary alignment device; rotating and aligning; and after clamping is completed, the coaxiality is rechecked. The rotary center of the part can be quickly and accurately aligned, and meanwhile modular design is adopted.

Description

Technical Field

[0001] The present invention relates to an offline high-precision centering and alignment device and method for rotating body parts, which is a method for centering and aligning parts outside equipment, and is suitable for aligning the rotation center reference of rotating body parts on exchangeable pallets outside equipment without the help of machine tools. Background Art

[0002] With the development and construction of flexible processing production lines, batch parts online non-intervention processing needs to solve the technical difficulties of offline alignment of parts. Among them, the rotation center of the parts needs to be aligned for rotating parts, that is, when clamping the parts, the axis of the parts should be made to coincide with the rotation axis of the pallet. In the machining industry, the commonly used technical means are to make special tooling for parts, special positioning elements or develop special alignment equipment. Based on the current situation of this industry, the present invention proposes a low-cost and highly versatile offline alignment method for rotating parts. Summary of the invention

[0003] The present invention solves the problem of quickly and accurately aligning the rotation center of a rotating body part offline in a flexible processing production line by providing an offline high-precision centering and alignment device and method for rotating body parts.

[0004] The present invention is achieved by the following technical solutions:

[0005] The invention discloses an offline centering and high-precision alignment device for rotating body parts, which is a rotary alignment device, comprising a vernier 3.01, a dial indicator 3.02, a calibration block 3.03, a rotating column 3.05, a pad column 3.06 and a trapezoidal positioning rack 3.10. The pad column 3.06 has a column body that matches with two holes of the tray at the bottom. The rotating column 3.05 is rotatably connected to the top of the pad column 3.06. The trapezoidal positioning rack 3.10 is connected to the rotating column 3.05 by a fastening screw c3.09 and a locating pin 3.08. The trapezoidal teeth at the bottom of the vernier 3.01 are meshed with the trapezoidal teeth at the top of the trapezoidal positioning rack 3.10. The calibration The stopper 3.03 is located at the head end of the vernier 3.01 and is connected to the trapezoidal positioning rack 3.10 by means of the fastening screw b3.07. The trapezoidal positioning rack 3.10 and the vernier 3.01 are both located in the groove at the upper end of the rotating column 3.05. The end face on the groove side of the upper end of the rotating column 3.05 is marked with a 0 mark. The locking screw a3.04 passes through the side wall of the groove of the rotating column 3.05 to lock the vernier 3.01. A protrusion is provided on the head of the vernier 3.01, and a horizontal small hole is provided on the protrusion for the head of the dial indicator 3.02 to pass through. The locking screw d3.11 passes through the protrusion on the head of the vernier 3.01 to lock the dial indicator 3.02.

[0006] Different heights of raised columns 3.06 or different sizes of raised columns 3.06 are spliced ​​together and different lengths of vernier rulers form a modular component design.

[0007] The pitch of trapezoidal teeth is 4mm; the dial indicator can be replaced by a micrometer.

[0008] An offline high-precision centering and alignment device for rotating body parts comprises the following steps:

[0009] 1) Processing alignment reference holes: At the corners of the tray 4, take the rotation center of the tray 2 as the reference and process 4 alignment reference holes 4;

[0010] 2) Calibration of the rotary alignment device 3: align the vernier 3.01 with the 0 mark on the rotating column 3.05, mesh the trapezoidal teeth at the bottom of the vernier 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 block 3.03, tighten the locking screw d3.11, and set the dial of the dial indicator 3.02 to zero; repeat the above steps to calibrate all four sets of rotary alignment devices 3, and ensure that the readings of the four dial indicators are consistent and all are set to zero;

[0011] 3) Rotation alignment: remove the calibration block 3.03 from the calibrated 4 pairs of rotary alignment devices 3, and install them on the pallet 4 to align the reference hole 4; loosen the locking screw a3.04, adjust the position of the vernier 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 reading by rotating the rotating column 3.05 and record it; adjust the position of the part, and finally make the vernier scales on the 4 pairs of rotary alignment devices 3 and the maximum value of the dial indicator reading completely consistent, which means that the rotation axis of the part is coaxial with the rotation axis of the pallet, and the part centering alignment is completed;

[0012] 4) Clamp the parts tightly, check the dial indicator 3.02 during clamping, and check the coaxiality after clamping.

[0013] The present invention processes the alignment reference hole on the pallet, designs a rotary alignment device, and cooperates with the alignment process technology solution to quickly and accurately align the rotation center of the part on the pallet without the need for machine tools and other special equipment. At the same time, the rotary alignment device adopts a modular component design, and the alignment requirements of parts of different sizes can be met by replacing modules of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of alignment, in which: 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 the rotary alignment device, in which: 3.01 vernier ruler, 3.02 dial indicator (range 8mm, accuracy 0.01mm), 3.03 calibration block, 3.04 locking screw a, 3.05 rotating column, 3.06 pad column;

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

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

[0018] Figure 5 yes Figure 4 A partial cross-sectional view in the direction of C;

[0019] Figure 6 Schematic diagram of rotation alignment;

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

[0021] Figure 8 Schematic diagram of modular jack posts and vernier scale. DETAILED DESCRIPTION

[0022] The present invention proposes an offline high-precision centering and alignment device and method for rotating body parts, and the specific implementation methods are as follows:

[0023] 1. As attached Figure 1 The figure shows a schematic diagram of a rotating part 1 on a pallet 2, and a schematic diagram of the position of a rotary alignment device 3 and an alignment reference hole 4. The alignment requirement of the part is that the rotation axis of the part needs to coincide with the rotation axis of the pallet below, and the coaxiality is not greater than 0.02 mm.

[0024] 2. Process and align the reference hole. Figure 1 As shown, four alignment reference holes 4 are machined at the corners of the tray 4 with the rotation center of the tray 2 as the reference.

[0025] 3. Calibration of the rotary alignment device 3. Figure 2 , 3As shown in Figures 4, 5, align the vernier 3.01 with the 0 mark on the rotating column 3.05, the trapezoidal teeth at the bottom of the vernier are meshed with the trapezoidal teeth at the top of the trapezoidal positioning rack 3.10, and lock 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 block 3.03, lock the locking screw d3.11, and set the dial of the dial indicator 3.02 to zero; repeat the above actions to calibrate all four pairs of rotary alignment devices 3 to ensure that the readings of the four dial indicators are consistent and all are set to zero.

[0026] 4. Rotate to align. Figure 6 As shown in the figure, remove the calibration block 3.03 from the calibrated 4 sets of rotary alignment devices 3; install them in the alignment reference hole of the tray 4; loosen the locking screw a3.04, adjust the position of the vernier 3.01, and make the head of the dial indicator 3.02 contact the surface of the part; as shown in the attached figure Figure 7 As shown, by rotating the rotating column 3.05, find the maximum reading of the dial indicator 3.02 and record it; adjust the position of the part, and finally make the vernier scales on the four pairs of rotary alignment devices 3 and the maximum reading of the dial indicator completely consistent (the deviation of the maximum value of the dial indicator reading is not more than 0.02mm), which means that the part rotation axis is coaxial with the pallet rotation axis, and the part centering and alignment is completed.

[0027] 5. Clamp the parts tightly, check the dial indicator 3.02 during clamping, and check the coaxiality after clamping.

[0028] Compared with the traditional alignment method, the present invention has the following advantages:

[0029] 1) High precision. The vernier scale positioning in the rotary alignment device of the present invention adopts high-precision trapezoidal gear meshing (such as the attached Figure 5 As shown), the trapezoidal tooth pitch is 4mm, with high positioning accuracy; the measurement and reading adopts 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) Good economy. The rotary alignment device in the present invention adopts a split design, which has a simple structure compared to special tools and equipment; at the same time, the measurement method adopts a common dial indicator on the market, and the locking method adopts a standard hexagon socket screw, which has a lower overall manufacturing cost and better economy.

[0031] 3) Modular design. The rotary alignment device of the present invention adopts a modular component design (such as the attached Figure 8 As shown in the figure, the use of different heights of 3.06 shims or different sizes of shims can meet the alignment needs of parts with different heights; the use of vernier rulers of different lengths can meet the alignment needs of parts with different rotary diameters, and has strong versatility.

Claims

1. An offline high-precision centering and alignment device for rotating parts, which is a rotary alignment device, is characterized by: It includes a vernier ruler, a dial indicator, a calibration block, a rotating column, a pad column and a trapezoidal positioning rack. The bottom of the pad column is provided with a column body that matches the tray hole. The rotating column can be rotatably connected to the top of the pad column. The trapezoidal positioning rack is fixedly connected to the rotating column. The trapezoidal teeth at the bottom of the vernier ruler are meshed with the trapezoidal teeth at the top of the trapezoidal positioning rack. The calibration block is located at the head end of the vernier ruler and is detachably connected to the trapezoidal positioning rack. The trapezoidal positioning rack and the vernier ruler are both located in the groove at the upper end of the rotating column. The end face on the groove side of the upper end of the rotating column is marked with engraved lines. The locking screw a passes through the side wall of the rotating column groove to lock the vernier ruler. A protrusion is provided on the head of the vernier ruler. A horizontal small hole for the dial indicator head to pass through is opened on the protrusion. The locking screw d passes through the protrusion on the head of the vernier ruler to lock the dial indicator.

2. The offline high-precision centering and alignment device for rotating parts according to claim 1 is characterized in that: The trapezoidal positioning rack is connected to the rotating column through a fastening screw c and a positioning pin.

3. The offline centering and high-precision alignment device for rotating parts according to claim 1 is characterized in that: The calibration stopper is connected to the trapezoidal positioning rack by means of a fastening screw b.

4. The offline high-precision centering and alignment device for rotating parts according to claim 1 is characterized in that: The modular component design is formed by splicing raising columns of different heights or raising columns of different sizes and vernier rulers of different lengths.

5. The offline high-precision centering and alignment device for rotating parts according to claim 1 is characterized in that: Trapezoidal teeth pitch 4mm.

6. The offline high-precision centering and alignment device for rotating parts according to claim 1 is characterized in that: The dial indicator is replaced by a micrometer.

7. The offline high-precision centering and alignment device for rotating parts according to claim 1 is characterized by: The locking screw adopts a standard hexagon socket screw.

8. An offline high-precision centering and alignment device for rotating parts, characterized by: The following steps are involved: 1) Processing alignment reference holes: Four alignment reference holes are processed at the four corners of the pallet with the pallet rotation center as the reference; 2) Calibration of the rotary alignment device: align the vernier with the engraved line on the rotating column, mesh the trapezoidal teeth at the bottom of the vernier 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 block, tighten the locking screw d, and set the dial of the dial indicator to zero; repeat the above steps to calibrate all four rotary alignment devices to ensure that the readings of the four dial indicators are consistent and all are set to zero; 3) Rotation alignment: Remove the calibration block from the four calibrated rotary alignment devices and install them on the four alignment reference holes of the pallet; loosen the locking screw a, adjust the position of the vernier scale so that the head of the dial indicator 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 scales on the four rotary alignment devices and the maximum value of the dial indicator reading are completely consistent, indicating that the rotation axis of the part is coaxial with the rotation axis of the pallet, and the part centering alignment is completed; 4) Clamp the parts tightly, check the dial indicator during clamping, and recheck the coaxiality after clamping.

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