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Vacuum adsorption clamp used for aspheric surface machining

A curved surface processing and vacuum adsorption technology, which is applied in the direction of manufacturing tools, metal processing equipment, working carriers, etc., can solve the problems of unstable processing and fragile workpieces, so as to avoid fragile workpieces, good rigidity, precision and high efficiency The effect of processing

Inactive Publication Date: 2013-10-09
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problems of the existing vacuum adsorption fixtures used for the processing of elastically deformed surfaces to replicate aspheric surfaces, the mold surfaces are all made of hard material groove structures, and there are problems that the workpieces are easily broken and the processing process is unstable. The present invention proposes An effective and reliable vacuum adsorption fixture for aspheric surface processing that can guarantee the surface accuracy of aspheric surface processing

Method used

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  • Vacuum adsorption clamp used for aspheric surface machining
  • Vacuum adsorption clamp used for aspheric surface machining
  • Vacuum adsorption clamp used for aspheric surface machining

Examples

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Embodiment 1

[0024] Embodiment 1 The vacuum adsorption fixture for processing aspheric surfaces according to the present invention includes a fixture body 1 and a master mold 2, and the upper surface of the fixture body 1 is provided with several concentric circular grooves with radial grooves Groove 11, the lower surface of the clamp body 1 is provided with a vacuum interface 12 communicated with the upper surface of the clamp body, and the vacuum interface 12 is connected with an external vacuum adsorption system through a vacuum interface clamp; The surface is a pattern surface 21, and the pattern surface 21 is processed into a curved surface opposite to the target surface shape and extending to the periphery of the clamp body, and the pattern 2 is fixed on the concentric surface of the upper surface of the clamp body 1 on groove 11.

[0025] The clamp body 1 is made of rigid hard material.

[0026] The master model 2 is made of porous ceramic material.

[0027] The upper surface of t...

Embodiment 2

[0031] Example 2 Using the aspheric surface vacuum adsorption jig involved in the present invention, an aspheric surface processing test based on the principle of elastic deformation surface shape replication was carried out. The material of the external clamp of the vacuum adsorption fixture is No. 45 steel, the material of the template is corundum porous ceramics with a porosity of 50% and an average pore diameter of 100 μm, and the surface of the template is a concave paraboloid with a diameter of 40 mm and a central curvature radius of 2500 mm. The workpiece material to be processed is quartz glass, and the plane grinding disc used is cast iron material plane grinding disc. The specific processing parameters are shown in Table 1:

[0032] Table 1 Processing parameter settings

[0033]

[0034] The machining process is stable and reliable, the phenomenon of workpiece fragmentation does not occur, and the sealing performance between the workpiece and the mold surface is ...

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Abstract

A vacuum adsorption clamp used for aspheric surface machining comprises a clamp body and a profiling mold, wherein a plurality of concentric circle grooves with radial slots are formed in the upper surface of the clamp body, a vacuum connector is arranged on the lower surface of the clamp body and communicated with the upper surface of the clamp body, and the vacuum connector is connected with an outer vacuum adsorption system through a vacuum connector clamp. The upper surface of the profiling mold is a profiling mold face, the profiling mold face is machined to be a curved surface which is opposite to a target surface shape and extends to the periphery of the clamp body, and the profiling mold is fixed on the concentric circle grooves in the upper surface of the clamp body. The vacuum absorption clamp used for the aspheric surface machining has the advantages that porous ceramics material is used, the problem that a workpiece in a groove profiling mold made of hard material is prone to cracking can be avoided, and stability and reliability of the process of elastic deformation surface type copying and machining are ensured; meanwhile, the porous ceramics material has the advantages of being even in adsorption and good in rigidity, and therefore surface type accuracy of the aspheric surface machining can be ensured.

Description

technical field [0001] The invention relates to a vacuum adsorption fixture for processing aspherical surfaces, in particular to a vacuum adsorption fixture suitable for processing aspheric surfaces based on the principle of elastic deformation surface replication. Background technique [0002] Aspheric surface parts are a very important type of parts in the fields of national defense, aerospace, astronomy, etc. They are also widely used in civilian optoelectronic products, and the market demand for aspheric surface lenses is rapidly increasing. The high-efficiency and low-cost processing technology of precision aspheric surfaces has also become a research hotspot. [0003] Among the existing aspherical surface processing methods, the elastic deformation surface shape replication processing technology is a new type of aspheric surface processing method (refer to the Chinese invention patent CN102139465B), and its basic principle is: according to the expected working surface ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B37/30B24B37/02
Inventor 袁巨龙吴喆赵萍吕冰海邓乾发
Owner ZHEJIANG UNIV OF TECH
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