A reference repair method for a large-size mold
By attaching reference blocks around large-sized molds and designing conversion reference holes, the problem of poor reference machining quality in mold rework was solved, achieving efficient and safe reference rework and reducing costs and time.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- THE RES INST FOR SPECIAL STRUCTURES OF AERONAUTICAL COMPOSITE AVIC
- Filing Date
- 2024-12-12
- Publication Date
- 2026-06-09
AI Technical Summary
In the current technology, the poor quality of the reference machining during the rework of large-size molds leads to the failure of the rework quality of the No. 2 machine tool, which requires repeated processing, is time-consuming, and requires two people to work together to align the molds, affecting safety and efficiency.
Four reference blocks are attached around the mold, and conversion reference holes are designed on the reference blocks. After alignment on machine tool No. 1, the mold is precisely machined on machine tool No. 2. The reference surface is converted by leveling the A-axis, which can be aligned by one person, reducing spindle runout and improving machining quality and safety.
It achieves high-quality benchmark machining, reduces rework time, lowers costs, improves safety and efficiency, and reduces reliance on large machine tools.
Smart Images
Figure CN119566380B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of rework technology for large mold manufacturing, and in particular to a standard rework method for large-size molds. Background Technology
[0002] To enable a certain type of mold to be used on a new etching machine, it needed to be reworked. The original method involved attaching six reference blocks to the upper surface of the mold flange. After alignment using the original reference blocks on machine tool one, the upper surface and sides of the reference blocks were machined to serve as the rework reference for machine tool two. However, during the machining of the reference blocks on machine tool one, interference occurred between the spindle and the mold surface. This required angled machining, resulting in poor surface quality and affecting the rework quality on machine tool two. Furthermore, during alignment using the reference blocks on machine tool two, the spindle was too close to the mold surface, requiring two people to work together. Moreover, due to the poor machining quality of the alignment reference blocks, the newly machined reference blocks failed to meet the outline requirements, resulting in unqualified coordinate measuring machines (CMMs) and necessitating repeated machining, leading to a long rework time. Summary of the Invention
[0003] The purpose of this invention is to provide a baseline rework method for large-size molds. The baseline alignment of this invention is more precise, increasing the safety and quality stability of mold rework and ensuring the usability of new etching machines.
[0004] Technical solution. A standard rework method for large-size molds, comprising the following steps:
[0005] S1. Four reference blocks are attached around the mold to be repaired; two of the reference blocks are located in the processing area of station one of the mold to be repaired, and two reference blocks are located in the processing area of station two of the mold to be repaired.
[0006] S2. On machine tool No. 1, align the mold based on the original datum surface and original datum hole. After alignment, take the middle of the two original datum holes in the machining area of station one on the mold as the origin of the machining coordinate system. Machin a conversion datum hole on each of the two datum blocks in the machining area of station two. At the same time, mill the top surfaces of the four datum blocks to the same plane to form a conversion datum surface. Record the coordinate positions of the two conversion datum holes.
[0007] S3. Transfer the mold to be repaired to the No. 2 machine tool; swing the A-axis of the No. 2 machine tool to the preset angle, and use the A-axis to level and transform the reference surface; after leveling, align and center the two original reference holes in the processing area of station one, and use the center position as the origin of the processing coordinate system to carry out the repair processing of the processing area of station one.
[0008] S4. After the machining of the first workstation area is completed, rotate the mold 180 degrees; swing the A-axis of the second machine tool to the preset angle and use the A-axis to level the conversion reference surface; after leveling, input the coordinate positions of the two conversion reference holes recorded in step S2 into the second machine tool, construct the machining coordinate system of the second workstation area based on the coordinate positions, and complete the rework machining of the second workstation area.
[0009] In the aforementioned method for reworking large-size molds, the reference block in step S1 is an aluminum reference block.
[0010] In the aforementioned method for reworking large-size molds, the reference block in step S1 is a copper reference block.
[0011] In the aforementioned method for reworking large-size molds, the reference block in step S1 is a stainless steel reference block.
[0012] In the aforementioned standard rework method for large-size molds, in step S1, the standard block is bonded to the mold to be reworked with adhesive.
[0013] In the aforementioned standard rework method for large-size molds, the adhesive used in step S1 is Bros. adhesive.
[0014] In the aforementioned standard rework method for large-size molds, in step S1, the standard block is elongated.
[0015] In the aforementioned standard rework method for large-size molds, the preset angle of the A-axis swing in steps S2 and S3 is 45°.
[0016] Beneficial effects: This invention uses four reference blocks attached to the circumference of the mold, instead of designing six reference blocks on the flange surface at the mold end. This method increases the safe distance between the main spindle of the first machine tool and the mold surface (flange surface), and the machining of the reference blocks does not require spindle runout, resulting in better reference block machining quality. Furthermore, by designing conversion reference holes on two reference blocks as alignment references instead of using the side as the alignment reference in the traditional method, the alignment is more accurate. This method also allows for one-person alignment on the second machine tool, saving labor costs, avoiding repeated reference point corrections, improving efficiency, and increasing the safety and quality stability of mold rework.
[0017] This invention is mainly applicable to the rework of large-sized molds in situations where the mold has no fixed reference and the machine tool travel is limited. This invention enables precise rework, ensuring the safety and quality of mold rework, saving costs, and providing more ideas for the rework of similar molds.
[0018] This invention enables mold making and repair even when the machine tool travel is insufficient, reducing reliance on large machine tools, reducing repair time, and lowering costs.
[0019] This invention achieves reference conversion by using an external reference block, which is low-cost, easy to source materials, and easy to process.
[0020] This invention has been applied to the rework of a certain type of mold. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the mold to be repaired according to the present invention. Detailed Implementation
[0022] Example 1. A standard rework method for large-size molds, see [link to example]. Figure 1 It includes the following steps:
[0023] S1. Four reference blocks 1 are attached around the mold to be repaired; two reference blocks 1 are located in the processing area 4 of station one of the mold to be repaired, and two reference blocks 1 are located in the processing area 5 of station two of the mold to be repaired.
[0024] S2. On machine tool No. 1, the original reference surface 2 and the original reference hole 3 of the mold to be repaired are aligned. After alignment, the middle of the two original reference holes 3 in the processing area 4 of station one on the mold to be repaired is taken as the origin of the processing coordinate system. A conversion reference hole 6 is machined on the two reference blocks 1 of the processing area 5 of station two. At the same time, the top surfaces of the four reference blocks 1 are milled to the same plane to form the conversion reference surface 7. The coordinate positions of the two conversion reference holes 6 are recorded.
[0025] S3. Transfer the mold to be repaired to the No. 2 machine tool; swing the A-axis of the No. 2 machine tool to the preset angle, and use the A-axis to level and transform the reference surface 7; after leveling, align and center the two original reference holes 3 in the processing area of station 1, and use the center position as the origin of the processing coordinate system to carry out the repair processing of the processing area of station 1.
[0026] S4. After the machining of the first workstation area is completed, rotate the mold 180 degrees; swing the A-axis of the second machine tool to the preset angle and use the A-axis to level the conversion reference surface 7; after leveling, input the coordinate positions of the two conversion reference holes 6 recorded in step S2 into the second machine tool, construct the machining coordinate system of the second workstation area based on the coordinate positions, and complete the rework machining of the second workstation area.
[0027] In step S1 above, the reference block 1 is an aluminum reference block. The aluminum block has the rigidity of metal while being relatively soft and easy to cut.
[0028] Optionally, in step S1, the reference block 1 is a copper reference block.
[0029] Optionally, in step S1, the reference block 1 is a stainless steel reference block.
[0030] In the aforementioned step S1, the reference block 1 is bonded to the mold to be repaired with adhesive.
[0031] In step S1 mentioned above, the glue used is Bros. glue.
[0032] In step S1 mentioned above, the reference block 1 is elongated. The elongated structure increases the safe distance between the spindle and the mold during reference machining, preventing tool collision.
[0033] In the aforementioned steps S2 and S3, the preset angle for the A-axis swing is 45°.
Claims
1. A standard rework method for large-size molds, characterized in that, Includes the following steps: S1. Four reference blocks (1) are attached around the mold to be repaired; two reference blocks (1) are located in the processing area of station one of the mold to be repaired (4), and two reference blocks (1) are located in the processing area of station two of the mold to be repaired (5). S2. On the No. 1 machine tool, the original reference surface (2) and the original reference hole (3) of the mold to be repaired are aligned. After alignment, the middle of the two original reference holes (3) in the processing area (4) of the station to be repaired is taken as the origin of the processing coordinate system. A conversion reference hole (6) is machined on the two reference blocks (1) of the processing area (5) of the station. At the same time, the top surface of the four reference blocks (1) is milled to the same plane to form a conversion reference surface (7). The coordinate positions of the two conversion reference holes (6) are recorded. S3. Transfer the mold to be repaired to the No. 2 machine tool; swing the A-axis of the No. 2 machine tool to the preset angle, and use the A-axis to level and transform the reference surface (7); after leveling, align and center the two original reference holes (3) in the processing area of station 1, and use the center position as the origin of the processing coordinate system to carry out the repair processing of the processing area of station 1. S4. After the processing of the first processing area is completed, rotate the mold 180 degrees; swing the A-axis of the second machine tool to the preset angle and use the A-axis to level the conversion reference surface (7); after leveling, input the coordinate positions of the two conversion reference holes (6) recorded in step S2 into the second machine tool, construct the processing coordinate system of the second processing area based on the coordinate positions, and complete the rework processing of the second processing area.
2. The standard rework method for large-size molds according to claim 1, characterized in that, In step S1, the reference block (1) is an aluminum reference block.
3. The standard rework method for large-size molds according to claim 1, characterized in that, In step S1, the reference block (1) is a copper reference block.
4. The standard rework method for large-size molds according to claim 1, characterized in that, In step S1, the reference block (1) is a stainless steel reference block.
5. The standard rework method for large-size molds according to claim 1, characterized in that, In step S1, the reference block (1) is bonded to the mold to be repaired with glue.
6. The standard rework method for large-size molds according to claim 1, characterized in that, In step S1, the reference block (1) is elongated into a strip shape.
7. The standard rework method for large-size molds according to claim 1, characterized in that, In steps S2 and S3, the preset angle for the A-axis swing is 45°.