4j36 high-precision special-shaped precision cantilever support and manufacturing method thereof

Abstract

The application discloses a 4J36 high-precision special-shaped precision cantilever support and a manufacturing method thereof, relates to the technical field of special-shaped structural members, and solves the problem that special-shaped cantilever supports commonly applied to optical systems and precision measurement and control equipment are prone to warping, springback, size out-of-tolerance and internal stress accumulation during conventional processing, and are difficult to meet the micron-level assembly requirements of optical lens mirror support frames and the like. The 4J36 high-precision special-shaped precision cantilever support comprises a base, a thin-wall rib and a cantilever beam, the thin-wall rib is located between the base and the cantilever beam, the base, the thin-wall rib and the cantilever beam are integrally cast into a shape, mounting holes are arranged through the upper surface and the bottom surface of the base, and the top end of the cantilever beam and the bottom surface of the base are provided with positioning reference surfaces. The application takes 4J36 alloy as a main body material, and improves the size stability and temperature adaptability of the special-shaped precision cantilever support through stress relief aging, stabilization aging and final stabilization aging during processing.

Description

Technical Field

[0001] This invention relates to the field of precision irregular structural components, specifically a 4J36 high-precision irregular precision cantilever support component and its manufacturing method. Background Technology

[0002] An optical system is a system composed of optical elements such as lenses, mirrors, and prisms arranged according to rules. It is mainly used for imaging or optical information processing. Its core follows the basic laws of geometric optics and can be divided into several categories such as transmission type and reflection type. Optical systems are widely used in precision measurement and control equipment to realize the online acquisition, transmission and closed-loop control of various physical parameters, covering multiple sub-fields such as flow monitoring, component detection and equipment inspection. The precision measurement and control equipment has high-precision irregular-shaped precision cantilever support components inside. These high-precision irregular-shaped precision cantilever support components are widely used in the key support structure of optical systems and precision measurement and control equipment.

[0003] Irregularly shaped cantilever support components, which are generally used in optical systems and precision measurement and control equipment, are prone to warping, springback, dimensional deviations, and internal stress accumulation during conventional processing, making it difficult to meet the micron-level assembly requirements of optical objective mirror support frames, etc. Therefore, they do not meet the existing needs. To address this, we propose a 4J36 high-precision irregularly shaped precision cantilever support component and its manufacturing method. Summary of the Invention

[0004] The purpose of this invention is to provide a 4J36 high-precision irregular-shaped precision cantilever support and its manufacturing method, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a 4J36 high-precision irregular-shaped precision cantilever support component, comprising a base, thin-walled ribs, and a cantilever beam. The thin-walled ribs are located between the base and the cantilever beam. The base, thin-walled ribs, and cantilever beam are integrally cast. An installation hole is provided through the upper and lower surfaces of the base. A positioning reference surface is provided at the top of the cantilever beam and the bottom surface of the base. The surface of the positioning reference surface is provided with three regularly distributed positioning protrusions.

[0006] Preferably, the base, thin-walled ribs, and cantilever beam are made of 4J36 Invar alloy, and the dimensional tolerance of the base, thin-walled ribs, and cantilever beam is ±0.005mm, the flatness and straightness are ≤0.003mm, and the surface roughness Ra is ≤0.4μm.

[0007] Preferably, the average linear expansion coefficient of the base, thin-walled reinforcement, and cantilever beam is ≤1.5×10⁻⁶ at 20–100℃. -6 / ℃.

[0008] A method for manufacturing a 4J36 high-precision irregular-shaped precision cantilever support includes the following steps: Select solution-treated 4J36 alloy billet, perform solution treatment and leveling pretreatment, and then rough machine the billet according to the reserved machining allowance; The rough-machined billet is subjected to stress-relief aging. After stress-relief aging, the billet is semi-finished according to the reserved finishing allowance. The semi-finished billet is stabilized and aged, and then the billet is finally finished. The finished blank is subjected to final stabilization aging to obtain the finished workpiece, and the finished workpiece is then subjected to precision testing and clean packaging.

[0009] Preferably, the solution treatment temperature of the solution-treated 4J36 alloy billet is 830–870℃. After solution treatment, it needs to be held at the temperature for 1–2 hours. After the holding time is completed, the solution-treated 4J36 alloy billet is cooled by water cooling or air cooling.

[0010] Preferably, during rough machining, the milling allowance of the blank is 1.0 mm, and during semi-finish machining, the milling allowance of the blank is 0.3 mm.

[0011] Preferably, during finishing, the blank is clamped and fixed using a multi-point flexible clamping method, the cutting depth of the blank is 0.05-0.15mm, and low-temperature cooling is performed by direct water jetting.

[0012] Preferably, precision inspection is performed using a coordinate measuring machine, laser interferometer, and surface roughness meter to complete the dimensional, geometric, and roughness inspection.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses 4J36 alloy as the main material and improves the dimensional stability and temperature adaptability of irregular precision cantilever support components through stress relief aging, stabilization aging and final stabilization aging during processing. It effectively reduces the long-term deformation of irregular precision cantilever support components and improves the form and position accuracy of irregular precision cantilever support components to the micron level, meeting the high-precision assembly requirements of optical systems. 2. In the process of processing, the present invention adopts multi-stage aging to completely release the internal stress of the billet, thereby reducing the deformation of the billet during processing and improving the yield of finished products obtained from the billet processing. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the irregular precision cantilever support component of the present invention; Figure 2 This is a front view of the irregular precision cantilever support component of the present invention; Figure 3 This is a left view of the irregular precision cantilever support component of the present invention; Figure 4This is a right view of the irregular precision cantilever support component of the present invention; Figure 5 This is a top view of the irregular precision cantilever support component of the present invention; Figure 6 This is a bottom view of the irregular precision cantilever support component of the present invention; Figure 7 This is a vertical sectional view of the mounting hole of the present invention; Figure 8 This is a process flow diagram of the irregular precision cantilever support component of the present invention.

[0015] In the diagram: 1. Base; 2. Thin-walled reinforcement; 3. Cantilever beam; 4. Positioning reference surface; 5. Positioning protrusion; 6. Mounting hole. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0017] like Figures 1 to 7 As shown, a 4J36 high-precision irregular-shaped precision cantilever support includes a base 1, a thin-walled rib 2, and a cantilever beam 3. The base 1, thin-walled rib 2, and cantilever beam 3 are made of 4J36 Invar alloy. The dimensional tolerance of the base 1, thin-walled rib 2, and cantilever beam 3 is ±0.005mm, the flatness and straightness are ≤0.003mm, and the surface roughness Ra is ≤0.4μm.

[0018] The average linear expansion coefficient of the base 1, thin-walled reinforcement 2, and cantilever beam 3 is ≤1.5×10⁻⁶ at 20–100℃. -6 / ℃.

[0019] Thin-walled reinforcement 2 is located between base 1 and cantilever beam 3. Base 1, thin-walled reinforcement 2 and cantilever beam 3 are integrally cast. Mounting hole 6 is provided between the upper surface and the bottom surface of base 1. Positioning reference surface 4 is provided at the top of cantilever beam 3 and the bottom surface of base 1.

[0020] The positioning reference surface 4 has three regularly distributed positioning protrusions 5. The positioning reference surface 4 is used to make reference fit with the assembled device during assembly, while the positioning protrusions 5 are used for precise docking during positioning and to ensure that the entire high-precision irregular precision cantilever support will not loosen after installation.

[0021] like Figure 8 As shown, a method for manufacturing a 4J36 high-precision irregular-shaped precision cantilever support includes the following steps: Select solution-treated 4J36 alloy billet and perform solution treatment and leveling pretreatment: The solution treatment temperature for the solution-treated 4J36 alloy billet is 830–870℃; After solution treatment, the solution-treated 4J36 alloy billet is held in a holding furnace for 1-2 hours. After the heat preservation is completed, the solid solution 4J36 alloy billet is cooled down by water cooling or air cooling.

[0022] The blank is rough-machined according to the reserved machining allowance; During rough machining, low-stress cutting is used to mill the blank into shape; The rough milling of the blank has a machining allowance of 1.0 mm.

[0023] Stress-relief aging of rough-machined billets: During the stress-relief aging stage, the rough-machined billet is held at 400℃ for 3–4 hours. After the holding time is over, the stress-relieved rough-machined billet is allowed to cool naturally in the holding furnace.

[0024] After stress-relief aging, the billet is semi-finished according to the reserved finishing allowance: During semi-finishing, it is necessary to unify the machining datum of the rough-machined blank. Then, according to the pre-determined allowance for finishing, the rough-machined blank is subjected to semi-finishing milling using a layered milling method. The semi-finishing milling allowance for the blank after rough machining is 0.3mm.

[0025] Stabilization aging of semi-finished billets: During the stabilization and aging stage, the semi-finished billet is placed inside a holding furnace and held at 185–195℃ for 4–6 hours. After the holding time is over, the semi-finished billet is allowed to cool naturally in the holding furnace.

[0026] After stabilization and aging, the billet undergoes final finishing treatment; During the final finishing process, a special tooling is used to clamp and fix the semi-finished blank. After clamping and fixing, a small depth of cut and micro-feed precision cutting method is used to perform the final milling process on the semi-finished blank. The special tooling uses a multi-point flexible clamping method to clamp and position the semi-finished blank. During finishing, the cutting depth of the semi-finished blank is 0.05-0.15mm. During the milling process, cooling water is directly sprayed onto the surface of the semi-finished blank to cool it at a low temperature.

[0027] The finished workpiece is obtained by final stabilization aging of the finished workpiece. In the final stabilization and aging stage, the finished workpiece is placed inside the holding furnace and held at 120–150℃ for 6–8 hours. After the holding time is over, the finished workpiece is transferred to the outside of the holding furnace and allowed to cool naturally in the air.

[0028] Precision testing and clean packaging of finished workpieces; Precision inspection is performed using a coordinate measuring machine, laser interferometer, and surface roughness meter to detect dimensions, shape, position, and roughness.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A 4J36 high-precision irregular-shaped precision cantilever support component, characterized in that: It includes a base (1), thin-walled ribs (2), and cantilever beam (3). The thin-walled ribs (2) are located between the base (1) and the cantilever beam (3). The base (1), thin-walled ribs (2), and cantilever beam (3) are integrally cast. An installation hole (6) is provided between the upper surface and the bottom surface of the base (1). The top of the cantilever beam (3) and the bottom surface of the base (1) are provided with a positioning reference surface (4). The surface of the positioning reference surface (4) is provided with three regularly distributed positioning protrusions (5).

2. The 4J36 high-precision irregular-shaped precision cantilever support component according to claim 1, characterized in that: The base (1), thin-walled rib (2), and cantilever beam (3) are made of 4J36 Invar alloy. The dimensional tolerance of the base (1), thin-walled rib (2), and cantilever beam (3) is ±0.005mm, the flatness and straightness are ≤0.003mm, and the surface roughness Ra is ≤0.4μm.

3. A 4J36 high-precision irregular-shaped precision cantilever support component according to claim 2, characterized in that: The average linear expansion coefficient of the base (1), thin-walled reinforcement (2), and cantilever beam (3) is ≤1.5×10 at 20–100℃. -6 / ℃.

4. A method for manufacturing the 4J36 high-precision irregular-shaped precision cantilever support as described in claim 3, characterized in that, Includes the following steps: Select solution-treated 4J36 alloy billet, perform solution treatment and leveling pretreatment, and rough machine the billet according to the reserved machining allowance; The rough-machined billet is subjected to stress-relief aging. After stress-relief aging, the billet is semi-finished according to the reserved finishing allowance. The semi-finished billet is then stabilized and aged, and then the billet is finally finished. The finished blank is subjected to final stabilization aging to obtain the finished workpiece, and the finished workpiece is then subjected to precision testing and clean packaging.

5. The manufacturing method of a 4J36 high-precision irregular-shaped precision cantilever support component according to claim 4, characterized in that: The solution treatment temperature of the solution-treated 4J36 alloy billet is 830–870℃. After solution treatment, it needs to be held at the temperature for 1–2 hours. After the holding time is completed, the solution-treated 4J36 alloy billet is cooled by water cooling or air cooling.

6. The manufacturing method of a 4J36 high-precision irregular-shaped precision cantilever support component according to claim 4, characterized in that: During rough machining, the milling allowance for the blank is 1.0 mm, and during semi-finish machining, the milling allowance for the blank is 0.3 mm.

7. The manufacturing method of a 4J36 high-precision irregular-shaped precision cantilever support component according to claim 4, characterized in that: During finishing, the blank is clamped and fixed using a multi-point flexible clamping method. The cutting depth of the blank is 0.05-0.15mm, and it is cooled at low temperature by direct water jetting.

8. The manufacturing method of a 4J36 high-precision irregular-shaped precision cantilever support component according to claim 4, characterized in that: Precision inspection is performed using a coordinate measuring machine, laser interferometer, and surface roughness meter to detect dimensions, shape, position, and roughness.

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