CN-116638132-B - Anti-dislocation compensation method for honeycomb core turn-over processing

Abstract

The invention discloses an anti-dislocation compensation method for honeycomb core turn-over processing, which belongs to the field of machining and comprises the steps of milling an anti-dislocation step I and an anti-dislocation step II at the positions of residual materials when a honeycomb core contour is machined on a first surface, milling the anti-dislocation step III and the anti-dislocation step IV at the positions of the residual materials before formally machining the second surface after the honeycomb core is fixed and positioned, measuring actual thicknesses of the anti-dislocation step III and the anti-dislocation step IV, comparing the actual thicknesses with the thicknesses of theoretical anti-dislocation steps, calculating offset in the X, Y, Z direction, adjusting a machining coordinate system according to the offset, milling the anti-dislocation step III and the anti-dislocation step IV again until the offset meets machining requirements, and formally machining parts. The invention can effectively compensate unavoidable secondary positioning errors during the turnover processing of the honeycomb core, and realize positioning compensation in the X, Y, Z direction and compensation verification before processing.

Inventors

• FANG ZHENG
• ZHOU JIN
• AN ZHIYU
• ZHONG JIAN
• ZHOU TAO
• HU YIMIN

Assignees

• 成都飞机工业（集团）有限责任公司

Dates

Publication Date

20260512

Application Date

20230612

Claims (6)

1. 1. The honeycomb core turn-over processing dislocation prevention compensation method is characterized by comprising the following steps of: Step one, when the profile of a first surface honeycomb core is processed, milling an error-proofing inclined step one (1) and an error-proofing inclined step two (2) respectively in two right-angle sides of the rest positions, namely in the directions of an X axis and a Y axis, wherein the error-proofing inclined step one (1) and the error-proofing inclined step two (2) are step profiles formed by connecting a group of mutually parallel honeycomb core planes by using an inclined honeycomb core profile, and the included angle alpha between the inclined honeycomb core profile of the error-proofing inclined step one (1) and the X axis direction and the included angle beta between the inclined honeycomb core profile of the error-proofing inclined step two (2) and the Y axis direction are both larger than 0 DEG and smaller than 90 DEG; Step two, after turning over, fixing and positioning the honeycomb core, before formally processing the second honeycomb core, milling a parallel error-proof inclined step three (3) and an error-proof inclined step four (4) respectively corresponding to the error-proof inclined step one (1) and the error-proof inclined step two (2) at the positions of the residual materials; Measuring the actual thickness of a honeycomb core plane area and an inclined honeycomb core molded surface area formed between an inclined-slope-prevention step III (3) and an inclined-slope-prevention step I (1), and the actual thickness of a honeycomb core plane area and an inclined honeycomb core molded surface area formed between an inclined-slope-prevention step IV (4) and an inclined-slope-prevention step II (2), comparing the actual thickness with the thickness of a theoretical inclined-slope-prevention step, and calculating the offset in the X-axis, Y-axis and Z-axis directions; And fourthly, adjusting a machining coordinate system according to the offset, milling the error-proof inclined step III (3) and the error-proof inclined step IV (4) again until the offset meets the machining requirement, and finally formally machining the part.
2. 2. The method for compensating for misalignment during a honeycomb core turn-up process of claim 1 wherein the first face of the honeycomb core is machined to ensure that the cell direction is oriented in the Z-axis direction.
3. 3. The honeycomb core turn-over processing dislocation prevention compensation method according to claim 1, wherein in the second step, when the dislocation prevention step III (3) and the dislocation prevention step IV (4) are milled for the first time, the parallel of the inclined honeycomb core molded surface and the honeycomb core plane on two sides is required to be ensured, the thickness of a formed area is larger than that of a theoretical dislocation prevention step area, and a margin is reserved for subsequent multiple verification.
4. 4. The method of claim 1, wherein the offset Z 0 =Z 1 -Z 2 is Z 1 is the actual thickness of the honeycomb core planar region formed by the two-sided honeycomb core planar surfaces, and Z 2 is the theoretical thickness of the honeycomb core planar region.
5. 5. The method for compensating for misalignment during honeycomb core turn-up processing of claim 1 wherein the Y-axis is offset Wherein H 3 is the actual thickness of the inclined honeycomb core profile area formed by the inclined-prevention step II (2) and the inclined-prevention step IV (4), H 4 is the known theoretical thickness, alpha is the included angle between the inclined honeycomb core profile along the X-axis direction and the X-plane, beta is the included angle between the inclined honeycomb core profile along the Y-axis direction and the Y-plane, Z 1 is the actual thickness of the honeycomb core plane area formed by the two-sided honeycomb core planes, and Z 2 is the theoretical thickness of the honeycomb core plane area.
6. 6. The honeycomb core turn-up processing misalignment prevention compensation method of claim 1, wherein the offset in the X-axis direction is Wherein H 1 is the actual thickness of the inclined honeycomb core molded surface area formed by taking the inclined prevention step I (1) and the inclined prevention step III (3), H 2 is the known theoretical thickness, alpha is the included angle between the inclined honeycomb core molded surface and the X plane along the X axis direction, beta is the included angle between the inclined honeycomb core molded surface and the Y plane along the Y axis direction, Z 1 is the actual thickness of the honeycomb core plane area formed by two honeycomb core planes, and Z 2 is the theoretical thickness of the honeycomb core plane area.

Description

Anti-dislocation compensation method for honeycomb core turn-over processing Technical Field The invention relates to the field of machining parts, in particular to an anti-dislocation compensation method for honeycomb core turn-over machining. Background The honeycomb core molded surface processed by the traditional process scheme is still within the tolerance range during vertical measurement, but the existing partial area is close to the tolerance boundary, and the original processing stability is poor only by means of visual observation, side clamping and positioning. For the honeycomb core part needing to be turned over, when the second surface is turned over, clamping deviation inevitably exists due to the fact that the honeycomb core is held and positioned again, burrs are more after milling the contour edge of the honeycomb core, the surface is uneven, a method commonly used for connecting the two sides of the metal part with the reference edges of the contour is not suitable for the honeycomb core, and the turning over and the dislocation of the honeycomb core can directly influence the processing quality of the part. When processing metal materials such as aluminum alloy and titanium alloy, a method of drawing a reference edge on a blank contour is generally adopted for clamping dislocation inspection and coordinate adjustment. However, the contour edges of the honeycomb cores have more burrs, and the honeycomb cores are divided honeycomb core grids, and have no complete contour straight edges, so that clamping error-proofing inspection and coordinate adjustment cannot be accurately performed in a reference edge pulling mode. In the prior art, patent CN112823985A discloses an error-proofing method for machining a double-molded-surface honeycomb part, and the technical content of the error-proofing method for machining the double-molded-surface honeycomb part is realized by a pair of sub-parent bosses and an error-proofing avoiding groove. Through reserving mistake proofing primary and secondary boss when processing part benchmark limit, confirm part Y to the clamping according to primary and secondary boss relative position relation, when the first face of part was processed, the lower end edge processing of profile was out mistake proofing and was dodged the groove, and part X was to the clamping when confirming the second face processing according to dodging the position in groove. After the honeycomb part blank is trimmed, the honeycomb part blank is held by taking the trimmed face as a reference, namely, the reference is found by milling the honeycomb core outline, however, as the honeycomb core outline is rough, the dislocation measurement is inaccurate, the dislocation of processing is easy to be caused finally, and the proposal of the patent can only realize error-proof inspection and can not obtain the processing compensation value. Disclosure of Invention The invention aims to solve the problems that in the prior art, the reference edge step difference cannot be accurately measured due to uneven surface after milling the honeycomb core profile, so that the dislocation after the honeycomb core turning processing cannot be accurately measured and compensated, and provides an anti-dislocation compensation method for honeycomb core turning processing, which can effectively compensate unavoidable secondary positioning errors during honeycomb core turning processing and realize positioning compensation in the X, Y, Z direction and compensation verification before processing. In order to achieve the above object, the present invention has the following technical scheme: The honeycomb core turn-over processing dislocation prevention compensation method is characterized by comprising the following steps of: Milling an error-proof inclined step I and an error-proof inclined step II at the positions of the residual materials when the profile of the honeycomb core of the first surface is processed; Step two, after turning over, fixing and positioning the honeycomb core, before formally processing the second honeycomb core, milling a parallel error-proofing inclined step three and an error-proofing inclined step four respectively corresponding to the error-proofing inclined step one and the error-proofing inclined step two at the positions of the residual materials; measuring the actual thickness of the error-proofing inclined step III and the error-proofing inclined step IV, comparing the actual thickness with the thickness of the theoretical error-proofing inclined step, and calculating the offset in the X, Y, Z axis direction; And fourthly, adjusting a machining coordinate system according to the offset, milling the error-proof inclined step III and the error-proof inclined step IV again until the offset meets the machining requirement, and formally machining the part. Further, when the first face is processed, the cell direction of the honeycomb core needs to be ensured to be along the Z-axis dire