Machining method of honeycomb sacrifice tool

Abstract

The invention discloses a honeycomb sacrifice tool machining method which comprises the following steps that a tool is designed according to the shape of a part blank, and the designed tool specifically comprises a first sacrifice tool, a second sacrifice tool, a first base plate tool, a second base plate tool and a plurality of positioning pins; a first sacrifice tool, a first base plate tool and the honeycomb part are adopted on the machine tool to obtain a first honeycomb part molded surface; a clearance groove and a first positioning hole are machined in the second sacrifice tool; performing static pressure on the first honeycomb part molded surface on a second sacrifice tool to obtain a second honeycomb part molded surface; and the second sacrifice tool on the molded surface of the second honeycomb part is removed, the machined honeycomb part is obtained, and whether the tolerance of the machined honeycomb part is within a preset range or not is detected. According to the honeycomb part machining tool, the parts are machined through the designed tool, deformation of the honeycomb parts in the machining process is avoided, the machining precision of the honeycomb parts can be improved, and the machining rejection rate of the honeycomb parts is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of numerical control machining, in particular to a machining method for a honeycomb sacrificial tooling. Background Art

[0002] With the development of modern aviation technology, higher requirements have been put forward for the stealth performance of aircraft, and a large number of new high-performance materials have been introduced. Honeycomb absorbing materials have been widely used in the new generation of combat aircraft due to their many advantages such as high strength-to-weight ratio. In the military field, they are often used for aircraft structural parts. Most of the aircraft structural parts are special-shaped structures that require CNC machining. In CNC machining, when metal parts need secondary positioning processing, it is often necessary to mill pin holes or straight edges on the part blanks for alignment to ensure the accuracy of the parts during secondary clamping. However, honeycomb materials are extended or shortened in the non-stress direction during processing. If straight edges or positioning holes are milled on the honeycomb for secondary processing positioning, it is easy to cause inaccurate positioning due to the extension or shortening of the honeycomb, which will cause the processing to be scrapped.

[0003] At present, when honeycomb materials need secondary processing, they are generally processed by repeated positioning of the profile or multiple edges. However, this method has too many human factors and is very demanding on the operating ability of on-site personnel. In addition, the positioning will be misaligned after the honeycomb is extended or shortened, which seriously affects the size of the parts and thus affects the assembly. Therefore, finding a new positioning process combined with CNC machining technology for secondary positioning processing to increase the accuracy of repeated positioning is the most urgent need at present. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a processing method of a honeycomb sacrificial tooling, comprising the following steps: S1. designing a tooling according to the shape of a part blank, wherein the designed tooling specifically includes: a first sacrificial tooling, a second sacrificial tooling, a first pad tooling, a second pad tooling, and a plurality of locating pins; S2. using the first sacrificial tooling, the first pad tooling, and a honeycomb part on a machine tool to obtain a first honeycomb part profile; S3. processing an air avoidance groove and a first locating hole on the second sacrificial tooling; S4. statically pressing the first honeycomb part profile on the second sacrificial tooling to obtain a second honeycomb part profile; S5. removing the second sacrificial tooling on the second honeycomb part profile to obtain a processed honeycomb part, and detecting whether the tolerance of the processed honeycomb part is within a preset range.

[0005] Furthermore, the step S2 specifically includes the following sub-steps: S21. Glue the first pad tooling on the machine tool and then mill and plan it flat; S22. Glue the first sacrificial tooling on the first pad tooling and mill and plan it flat; S23. Glue the honeycomb part on the first sacrificial tooling and statically press it to obtain the first honeycomb part profile.

[0006] Furthermore, the S3 step specifically includes the following sub-steps: S31. Milling a second sacrificial tool on a machine tool, and processing the air avoidance groove required for the honeycomb part on the second sacrificial tool; S32. Bonding the second sacrificial tool to the milled surface of the first honeycomb part and statically pressing it; S33. After static pressing is completed, milling the second sacrificial tool and processing the first positioning hole.

[0007] Furthermore, the step S4 specifically includes the following sub-steps: S41. Milling a second positioning hole on the second backing plate tooling; S42. Inserting a positioning pin into the second positioning hole; S43. Positioning and bonding the honeycomb part and the first sacrificial tooling to the second sacrificial tooling and statically pressing; S44. Removing the first sacrificial tooling after static pressing; S45. Milling the first honeycomb part profile to obtain the second honeycomb part profile.

[0008] The present invention provides a method for processing a honeycomb sacrificial tool, which has the following beneficial effects: (1) The present invention avoids the problem of inaccurate positioning during secondary processing due to honeycomb shrinkage by adding positioning pins; (2) The problem of parts being scrapped due to excessive deformation during processing was solved by adding a second sacrificial tool to fix the honeycomb parts. (3) By adding an avoidance groove, the problem of the tool colliding with the tooling during the milling process is avoided; (4) By adding a first sacrificial tool and milling it away after use, the problem of the second sacrificial tool being ineffective due to the glue remover penetrating into the honeycomb during the processing is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0010] Figure 1 A flow chart of the method provided by the present invention; Figure 2 A schematic diagram illustrating steps S1-S2 in the embodiment provided by the present invention; Figure 3 A schematic diagram illustrating step S3 in the embodiment provided by the present invention; Figure 4 This is a schematic diagram for explaining steps S4-S5 in the embodiment provided by the present invention.

[0011] In the figure: 111-first pad tooling; 112-first sacrificial tooling; 113-second sacrificial tooling; 121-second pad tooling; 211-honeycomb part; 311-first positioning hole; 312-air avoidance groove; 321-second positioning hole; 322-positioning pin; 411-first honeycomb part profile; 421-second honeycomb part profile. DETAILED DESCRIPTION

[0012] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0013] The following is a detailed description of the implementation method of the present invention in conjunction with the accompanying drawings. Only some embodiments are described, not all embodiments. For the purpose of clarity, representations and descriptions that are not related to the present invention are omitted in the drawings and descriptions.

[0014] In order to have a clearer understanding of the technical features, purposes and beneficial effects of the present invention, the technical solution of the present invention is now described in detail below. Obviously, the implementation cases described are part of the embodiments of the present invention, not all of the embodiments, and cannot be understood as limiting the scope of the implementation of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0015] like Figure 1-4 As shown, the present invention provides a method for processing a honeycomb sacrificial tool, comprising the following steps: S1. Designing a tooling according to the shape of the part blank, wherein the designed tooling specifically includes: a first sacrificial tooling 112, a second sacrificial tooling 113, a first pad tooling 111, a second pad tooling 121, and a plurality of positioning pins 322; S2. Using the first sacrificial tooling 112, the first pad tooling 111, and the honeycomb part 211 on the machine tool to obtain the first honeycomb part profile 411; S3. Processing the air avoidance groove 312 and the first positioning hole 311 on the second sacrificial tooling 113; S4. Static pressing the first honeycomb part profile 411 on the second sacrificial tooling 113 to obtain the second honeycomb part profile 421; S5. Removing the second sacrificial tooling 113 on the second honeycomb part profile 421 to obtain the processed honeycomb part 211, and detecting whether the tolerance of the processed honeycomb part 211 is within a preset range.

[0016] The S2 step specifically includes the following sub-steps: S21. The first backing plate fixture 111 is bonded to the machine tool and then milled flat; S22. The first sacrificial fixture 112 is bonded to the first backing plate fixture 111 and milled flat; S23. The honeycomb part 211 is bonded to the first sacrificial fixture 112 and statically pressed to obtain a first honeycomb part profile 411.

[0017] The S3 step specifically includes the following sub-steps: S31. Milling the second sacrificial tooling 113 on the machine tool, and processing the air avoidance groove 312 required for the honeycomb part 211 on the second sacrificial tooling 113; S32. Bonding the second sacrificial tooling 113 to the milled first honeycomb part profile 411 and statically pressing; S33. After the static pressing is completed, the second sacrificial tooling 113 is milled and the first positioning hole 311 is processed.

[0018] The S4 step specifically includes the following sub-steps: S41. Milling a second positioning hole 321 on the second pad tooling 121; S42. Inserting the positioning pin 322 into the second positioning hole 321; S43. Positioning and bonding the honeycomb part 211 and the first sacrificial tooling 112 to the second sacrificial tooling 113 and statically pressing; S44. After the static pressing is completed, removing the first sacrificial tooling 112; S45. Milling the first honeycomb part profile 411 to obtain the second honeycomb part profile 421.

[0019] Embodiment: A processing technology for a honeycomb sacrificial tool comprises the following steps: Design tooling according to the shape of the part blank, such as Figures 2 to 4 As shown, the tooling includes four sets of tooling, including two sets of sacrificial tooling, two sets of pad tooling, and a number of locating pins.

[0020] The first pad tool 111 is bonded to the machine tool and then milled flat, the first sacrificial tool 112 is bonded to the first pad tool 111 and then milled flat, the honeycomb part 211 is bonded to the first sacrificial tool 112 and statically pressed, and the first honeycomb part profile 411 is milled after the static pressing is completed.

[0021] The second sacrificial tool 113 is milled on the machine tool to process the required clearance groove 312 of the part, and then the milling is completed and removed for use.

[0022] The second sacrificial tool 113 is bonded to the milled first honeycomb part profile 411 and statically pressed. After the static pressing is completed, the second sacrificial tool positioning hole 311 is milled. After completion, the first sacrificial tool 112, the honeycomb part 211 and the second sacrificial tool 113 are removed together for standby use.

[0023] The positioning hole 321 on the second pad tooling 121 is milled, and the positioning pin 322 is inserted into the second pad tooling 121, and the honeycomb part 211 and the first sacrificial tooling 112 described in step S4 are positioned and bonded to the second sacrificial tooling 113 and statically pressed. After the static pressing is completed, the first sacrificial tooling 112 is removed.

[0024] After removing the first sacrificial tool 112, the second honeycomb part profile 421 is milled, and after milling, the honeycomb part 211 together with the second sacrificial tool 113 is removed and the second sacrificial tool 113 is removed. After completion, the dimensional tolerance of the honeycomb part 211 is inspected using an inspection tool.

[0025] The present invention adds a positioning pin to avoid inaccurate positioning during secondary processing due to honeycomb shrinkage; adds a second sacrificial tool to fix the honeycomb parts to solve the problem of parts being scrapped due to excessive deformation during processing; adds an avoidance groove to avoid the tool colliding with the tool during milling during the numerical milling process; adds a first sacrificial tool to be milled away after use to avoid the second sacrificial tool being ineffective after the glue remover penetrates into the honeycomb during processing.

[0026] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A method for processing a honeycomb sacrificial tooling, characterized in that: The following steps are involved: S1. Designing a tooling according to the shape of the part blank, wherein the design tooling specifically includes: a first sacrificial tooling, a second sacrificial tooling, a first pad tooling, a second pad tooling, and a plurality of positioning pins; S2. Using the first sacrificial tooling, the first backing plate tooling and the honeycomb part on the machine tool to obtain the first honeycomb part profile; S3. Processing the air-avoiding groove and the first positioning hole on the second sacrificial tooling; S4. statically pressing the first honeycomb part profile on the second sacrificial tooling to obtain a second honeycomb part profile; S5. removing the second sacrificial tooling on the second honeycomb part molding surface to obtain a processed honeycomb part, and detecting whether the processed honeycomb zero tolerance is within a preset range.

2. The method for processing a honeycomb sacrificial tool according to claim 1, characterized in that: The S2 step specifically includes the following sub-steps: S21. The first pad tooling is connected to the machine tool and then milled flat; S22. Connecting the first sacrificial tooling to the first pad tooling and milling it flat; S23. Connect the honeycomb component to the first sacrificial tool and perform static pressing to obtain the first honeycomb component profile.

3. The method for processing a honeycomb sacrificial tool according to claim 2, characterized in that: The S3 step specifically includes the following sub-steps: S31. Milling the second sacrificial tooling on a machine tool, and processing the air-avoiding groove on the second sacrificial tooling; S32. The second sacrificial tooling is bonded to the first honeycomb part surface after the number of milling is completed and statically pressed; S33. After the static pressing is completed, the second sacrificial tooling is subjected to CNC milling and the first positioning hole is processed.

4. The method for processing a honeycomb sacrificial tooling according to claim 3, characterized in that: The S4 step specifically includes the following sub-steps: S41. Milling a second positioning hole on the second pad tooling; S42. Inserting the positioning pin into the second positioning hole; S43. Positioning and bonding the honeycomb part and the first sacrificial tooling to the second sacrificial tooling and statically pressing; S44. After the static pressure is completed, the first sacrificial tooling is removed; S45. Milling the first honeycomb component profile to obtain a second honeycomb component profile.

5. The method for processing a honeycomb sacrificial tooling according to claim 2, characterized in that: In the step S21, the first pad tooling is bonded to the machine tool.

6. The method for processing a honeycomb sacrificial tooling according to claim 2, characterized in that: In the step S22, the first sacrificial tooling is bonded to the first pad tooling.

7. The method for processing a honeycomb sacrificial tooling according to claim 2, characterized in that: In the step S23, the honeycomb component is bonded to the first sacrificial tooling.

Images