Machining process for special-shaped part made of foam wave-absorbing material

Abstract

The invention relates to a processing technology for a special-shaped part made of a foam wave-absorbing material, which comprises the following steps of: firstly, according to the shape design of a part blank, processing the part blank into a semi-finished product through a cutting machine, then designing and processing an inner cavity processing tool according to the shape of the semi-finished product, positioning the semi-finished product on the inner cavity processing tool, and processing a product inner cavity; and finally, designing and processing a shape processing tool according to the shape of the inner cavity of the semi-finished product, positioning the semi-finished product on the shape processing tool, and processing the shape of the product. The machining method has the beneficial effects that the problems of deformation, discontinuity and completeness and reference deviation in the part machining process can be solved by combining with auxiliary machining of a machining tool, and then the product machining precision and quality are improved.

Description

Technical Field

[0001] The invention relates to the technical field of wave absorbing material processing, and in particular to a processing technology for special-shaped parts of foam wave absorbing materials. Background Art

[0002] Foam absorbing materials have a series of advantages such as light weight, easy cutting (can be processed into various shapes), high reliability, stable performance, and multi-layer design. They meet the requirements of RoHS environmental protection directives (flame retardant performance reaches V-2 level) and have excellent absorbing and flame retardant properties. They can be widely used in communication and radar system clutter suppression, microwave darkrooms, test boxes and other fields.

[0003] For CNC machining of special-shaped parts of foam absorbing materials, since the foam absorbing materials themselves are soft and have strong elasticity, the existing machining of special-shaped parts of foam absorbing materials is mainly to lay the materials layer by layer according to standard sizes and finally fix them into standard three-dimensional shapes. This is essentially different from the machining of other straight parts or parts made of other materials. In addition, due to the characteristics of the material blanks themselves, quality problems such as appearance deformation, discontinuity and completeness, and deviation from the machining datum are easily generated during the machining process. It is difficult to meet the requirements of high-quality and efficient milling machining, resulting in a low yield rate of parts and a relatively low machining efficiency.

[0004] Based on the fact that the existing processing technology is difficult to meet the high-precision processing requirements of special-shaped parts of foam absorbing materials, the research found that new processing technology is one of the main directions to solve the problems of low yield and poor precision of special-shaped parts of existing foam absorbing materials. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a processing technology for special-shaped parts of foam absorbing materials, which, combined with auxiliary processing by processing tooling, can solve the problems of deformation, discontinuous integrity, and benchmark deviation during part processing, thereby improving product processing accuracy and quality.

[0006] The purpose of the present invention is achieved through the following technical solutions: A special-shaped part processing technology of foam absorbing material comprises the following steps: S1. According to the design of the part blank shape, the part blank is processed into a semi-finished product by a cutting machine; S2. Design and process the inner cavity processing tooling according to the shape of the semi-finished product; S3. Position the semi-finished product with the front side of the product facing upward and bond it to the inner cavity processing tooling. Then, perform rough processing on the inclined surfaces of the inner cavity area A and the inner cavity area B of the semi-finished product. Then, perform fine processing on the inclined surfaces of the inner cavity area A and the inner cavity area B of the semi-finished product. Finally, remove the residual part in the middle of the semi-finished product to complete the inner cavity processing of the product. S4. Design and process the outer shape processing tooling according to the inner shape of the semi-finished product; S5. Position the semi-finished product with the back of the product facing upward and glue it to the shape processing tooling. Then, perform rough processing on the outer bevel and bottom surface of the semi-finished product, and then perform fine processing on the outer bevel and bottom surface of the semi-finished product. Finally, remove the remaining parts around the semi-finished product to complete the product shape processing.

[0007] Furthermore, both the inner cavity processing tooling and the outer shape processing tooling are provided with positioning surfaces adapted to the outer shape of the semi-finished product, and when the semi-finished product is positioned in step S3 or step S5, the semi-finished product is made to fit on the positioning surfaces.

[0008] Furthermore, a clearance groove is provided around the positioning surface, and when the semi-finished product is positioned in step S3 or step S5, the end faces around the semi-finished product are aligned with the end faces of the clearance groove.

[0009] Furthermore, one side of the positioning surface and the outer wall of the semi-finished product are both provided with anti-error angles, and when the product is positioned in step S3 or step S5, the anti-error angle on the semi-finished product is engaged with the anti-error angle on the positioning surface.

[0010] Furthermore, a positioning boss adapted to the inner cavity of the semi-finished product is provided in the positioning surface of the shape processing tooling. When the semi-finished product is positioned in step S5, the positioning boss is embedded in the inner cavity of the semi-finished product so that the processed inner cavity inclined surface of the semi-finished product is completely fitted with the positioning boss.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. Compared with the traditional processing technology, the present invention can prevent the material from shaking during the processing, thereby reducing the scrapping of raw materials and semi-finished products caused by product surface damage and material shaking, reducing material waste, and preventing material shaking can greatly preserve the integrity of the internal structure of the product, thereby ensuring that the product has excellent wave absorbing performance.

[0012] 2. The present invention solves the problems of deformation and easy deviation of the reference when processing special-shaped parts of foam absorbing materials. The actual processing results show that the present invention can make the processing accuracy of special-shaped parts of foam absorbing materials ≤0.5mm, greatly improving the production efficiency and high precision of the product, and has great economic and social value. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the product structure of the present invention; Figure 2 It is a structural schematic diagram of the semi-finished product in the present invention; Figure 3 It is a structural schematic diagram of the inner cavity processing tooling in the present invention; Figure 4This is a schematic diagram of positioning a semi-finished product when processing the inner cavity of a product in the present invention; Figure 5 It is a structural schematic diagram of the shape processing tooling in the present invention; Figure 6 This is a schematic diagram of the positioning of the semi-finished product when processing the product shape in the present invention; Figure 7 It is a schematic diagram of the overall processing flow of the present invention.

[0014] In the figure: 1. Inclined surface of inner cavity A area; 2: Inclined surface of inner cavity B area; 3. External inclined surface; 4. Bottom surface; 5. Positioning surface; 6. Avoidance groove; 7. Anti-misalignment angle; 8. Positioning boss. DETAILED DESCRIPTION

[0015] The present invention is further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0016] like Figure 1 As shown, a special-shaped part of a foam absorbing material includes a product cavity. When processing the part product, in addition to processing the product shape and the product cavity, it is mainly necessary to process the inclined surface of the product cavity area A, the inclined surface of the cavity area B, the outer inclined surface and the bottom surface, wherein the inclined surface of the cavity area A and the inclined surface of the cavity area B are respectively located at two opposite corners of the product cavity. During processing, the part blank is first designed according to the shape of the part blank, and the part blank is processed into a semi-finished product by a cutting machine. Then, according to the shape of the semi-finished product, the inner cavity processing tooling is designed and processed, the semi-finished product is positioned on the inner cavity processing tooling and the product cavity is processed. Finally, according to the shape of the semi-finished product cavity, the outer shape processing tooling is designed and processed, the semi-finished product is positioned on the outer shape processing tooling and the product shape is processed.

[0017] like Figure 7 As shown, the specific processing technology includes the following steps: S1. According to the design of the blank shape of the parts, the blank parts are processed into semi-finished products by cutting machines. Figure 2 As shown, the outer wall of the semi-finished product is processed with an anti-misalignment angle 7.

[0018] S2. Design and process the inner cavity processing tooling according to the appearance of the semi-finished product.

[0019] S3, such as Figure 4 As shown, the semi-finished product is positioned and bonded to the inner cavity processing tooling in a manner that the front side of the product faces upward, and then the inner cavity area A and the inner cavity area B of the semi-finished product are rough-processed, and then the inner cavity area A and the inner cavity area B of the semi-finished product are fine-processed, and finally the residual part in the middle of the semi-finished product is removed to complete the inner cavity processing of the product; S4. Design and process the outer shape processing tooling according to the inner shape of the semi-finished product.

[0020] S5. Position the semi-finished product with the back of the product facing upward and glue it to the shape processing tooling. Then, perform rough processing on the outer bevel and bottom surface of the semi-finished product, and then perform fine processing on the outer bevel and bottom surface of the semi-finished product. Finally, remove the remaining parts around the semi-finished product to complete the product shape processing.

[0021] After the inner cavity and outer shape of the product are processed, the product must be self-inspected. After the overall processing of the product is completed, the product can be coated and inspected.

[0022] like Figure 3 , Figure 5 As shown, both the inner cavity processing tooling and the outer shape processing tooling are processed with a positioning surface 5 that matches the outer shape of the semi-finished product, and one side of the positioning surface 5 is processed with an anti-mistake angle 7, and the anti-mistake angle 7 on the positioning surface 5 is adapted to the anti-mistake angle 7 on the semi-finished product. Figure 4 , Figure 6 As shown, when the semi-finished product is positioned in step S3 or step S5, the semi-finished product is made to fit against the positioning surface 5, and at the same time, the anti-error angle 7 on the semi-finished product is engaged with the anti-error angle 7 on the positioning surface 5. The setting of the anti-error angle 7 can make the product positioning unique.

[0023] like Figure 3-Figure 6 As shown, the side walls around the positioning surface 5 are also processed with air-avoiding grooves 6, which facilitate the alignment and positioning of the surrounding end faces of the semi-finished product with the end faces of the air-avoiding grooves 6 when positioning the semi-finished product in step S3 or step S5.

[0024] like Figure 4 , Figure 6 As shown, the positioning surface 5 of the shape processing tooling is processed with a positioning boss 8 that is compatible with the inner cavity of the semi-finished product. When the semi-finished product is positioned in step S5, the positioning boss 8 is embedded in the inner cavity of the semi-finished product so that the processed inner cavity inclined surface of the semi-finished product is completely fitted with the positioning boss 8, thereby ensuring the stability of the product during processing.

[0025] Since the product is easily damaged by the knife during processing, that is, when the knife contacts the film surface of the product, the tip of the knife lifts the film surface, forming a film surface wrapped around the knife and carrying the foam product, causing the product to be damaged and scrapped, a certain processing thickness needs to be reserved during fine processing, so that when the knife is processed close to the film surface, the knife is lifted and the processing is stopped in advance to prevent the problem of knife damage. In this embodiment, the reserved processing thickness for fine processing of the inclined surface of the inner cavity A area and the inclined surface of the inner cavity B area is 1mm, and the reserved processing thickness for fine processing of the outer inclined surface and the bottom surface is 0.7mm.

[0026] Compared with the traditional processing technology, the processing technology of the special-shaped parts of the above-mentioned foam absorbing material can prevent the material from shaking during the processing by setting the positioning surface 5 and the positioning boss 8, thereby reducing the scrapping of raw materials and semi-finished products due to product surface damage and material shaking, reducing material waste, and preventing material shaking can greatly preserve the integrity of the internal structure of the product, thereby ensuring that the product has excellent absorbing performance.

[0027] The present invention solves the problems of deformation and easy deviation of the reference when processing special-shaped parts of foam absorbing materials. According to the results after actual processing, the present invention can make the processing accuracy of special-shaped parts of foam absorbing materials ≤0.5mm, greatly improves the production efficiency and high precision of the product, and has great economic value and social value.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A process for processing special-shaped parts of foam absorbing materials, characterized in that: The following steps are involved: S1. According to the design of the part blank shape, the part blank is processed into a semi-finished product by a cutting machine; S2. Design and process the inner cavity processing tooling according to the shape of the semi-finished product; S3, positioning the semi-finished product on the inner cavity processing tooling with the front side of the product facing upward and bonding and fixing it, then firstly rough-processing the inner cavity A zone bevel (1) and the inner cavity B zone bevel (2) opposite to the semi-finished product, then fine-processing the inner cavity A zone bevel (1) and the inner cavity B zone bevel (2) of the semi-finished product, and finally removing the residual part in the middle of the semi-finished product to complete the inner cavity processing of the product; S4. Design and process the outer shape processing tooling according to the inner shape of the semi-finished product; S5. Position the semi-finished product with the reverse side facing upward and glue it onto the shape processing tooling. Then, perform rough processing on the outer bevel (3) and bottom surface (4) of the semi-finished product. Then, perform fine processing on the outer bevel (3) and bottom surface (4) of the semi-finished product. Finally, remove the residual parts around the semi-finished product to complete the product shape processing.

2. The process for processing special-shaped parts of foam absorbing materials according to claim 1, characterized in that: Both the inner cavity processing tooling and the outer shape processing tooling are provided with a positioning surface (5) adapted to the outer shape of the semi-finished product. When the semi-finished product is positioned in step S3 or step S5, the semi-finished product is made to fit on the positioning surface (5).

3. The process for processing special-shaped parts of foam absorbing materials according to claim 2, characterized in that: The positioning surface (5) is provided with a clearance groove (6) around it. When the semi-finished product is positioned in step S3 or step S5, the end faces around the semi-finished product are aligned with the end faces of the clearance groove (6).

4. The process for processing special-shaped parts of foam absorbing materials according to claim 2, characterized in that: One side of the positioning surface (5) and the outer wall of the semi-finished product are both provided with an anti-error angle (7). When the product is positioned in step S3 or step S5, the anti-error angle (7) on the semi-finished product is engaged with the anti-error angle (7) on the positioning surface (5).

5. The process for processing special-shaped parts of foam absorbing materials according to claim 2, characterized in that: The positioning surface (5) of the shape processing tool is provided with a positioning boss (8) adapted to the inner cavity of the semi-finished product. When the semi-finished product is positioned in step S5, the positioning boss (8) is embedded in the inner cavity of the semi-finished product so that the processed inner cavity inclined surface of the semi-finished product is completely fitted with the positioning boss (8).

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