Outer frame protection method for preventing part edge from collapsing in polishing process and application of outer frame protection method

Abstract

The invention discloses an outer frame protection method for preventing the edge of a part from collapsing in the polishing process. According to the method, the outer frame structure with the same shape as the non-machining face is glued to the non-machining face of the part, and edge collapse in the polishing process is prevented. The method comprises the specific steps that firstly, a part is machined on a grinding machine, and the edge collapse size is measured; an outer frame is designed according to the shape of the non-machined face of the part and the edge collapse size, it is ensured that the outer frame is matched with the part in size, and the outer frame is made of a material similar to the part in hardness; then, the hot melt adhesive ring is used for connecting the part with the outer frame, and it is ensured that the outer frame does not fall off in the machining process; then grinding the whole part and the outer frame to ensure that the thicknesses are consistent and measuring the flatness; and finally, heating to the melting point temperature of the hot melt adhesive, taking down the outer frame and the adhesive ring, cooling to room temperature, and removing the residue of the adhesive ring, thereby inhibiting the edge collapse phenomenon of the part. The method is simple in structure, convenient to operate and capable of effectively improving the machining quality of parts.

Description

Technical Field

[0001] This invention relates to the field of machining, and more particularly to a method for preventing the edges of parts from collapsing during the polishing process, belonging to the field of workpiece surface treatment and finishing technology. Background Technology

[0002] During machining and polishing processes, especially in the surface grinding or polishing of precision parts, edge collapse often occurs due to the structural characteristics of the non-machined surfaces and edges. This edge collapse not only affects the appearance quality of the parts but may also lead to a decrease in their functional performance. Current technologies mostly employ mechanical fixtures or support frames for fixation, but these fixtures still have the drawback of being unsuitable for parts with complex shapes and may affect the part's morphology during machining.

[0003] Therefore, how to prevent the edges of parts from collapsing during processing without changing their shape has become an urgent problem to be solved in the current technical field. Summary of the Invention

[0004] The purpose of this invention is to provide a method for protecting the outer frame of a part to prevent edge collapse during the polishing process. By using an outer frame structure on the non-machined surface of the part, the edge collapse phenomenon generated during the polishing process is avoided, thereby improving the machining accuracy and appearance quality of the part.

[0005] To achieve the above objectives, the present invention provides a method for protecting the outer frame of a part to prevent edge collapse during polishing, specifically including the following steps:

[0006] Step 1:

[0007] The planar structure of the part is machined on a grinding machine, and the collapse edge size of the part is measured.

[0008] Step Two:

[0009] Based on the shape of the unmachined surface of the part and the collapsed edge dimensions determined in the first step, design and fabricate the outer frame structure. The inner edge of the outer frame matches the shape of the unmachined surface of the part, the thickness of the outer frame is the same as the thickness of the part, and the minimum distance between the outer edge of the outer frame and the edge of the part is greater than the collapsed edge width. The material of the outer frame should be similar to or have the same hardness as the part to ensure that excessive stress is not generated on the part during processing.

[0010] Step 3:

[0011] The unmachined surface of the part is connected to the outer frame using a hot melt adhesive ring to ensure that the outer frame does not detach during the entire processing. The melting temperature of the hot melt adhesive ring should not exceed the deformation or cracking temperature of the part, and the thickness of the adhesive ring should be greater than the thickness of the part and the outer frame to ensure sufficient adhesion.

[0012] Step Four:

[0013] The parts obtained in the third step and the outer frame structure are placed on a grinding machine for overall grinding to make the thickness of the parts, rubber ring and outer frame consistent, and at the same time the flatness of the overall structure is accurately measured.

[0014] Step 5:

[0015] Heat the entire structure to the melting point of the hot melt adhesive, remove the outer frame and adhesive ring, and remove the remaining adhesive ring after cooling to room temperature, thereby effectively suppressing the collapse of the parts' edges.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. The protection method provided by the present invention effectively prevents the edge collapse of the parts caused by polishing pressure during the processing by combining hot melt adhesive with the outer frame, thereby improving the appearance quality and dimensional accuracy of the parts.

[0018] 2. This method has high adaptability and can be widely applied to parts of various shapes and materials.

[0019] 3. By using hot melt adhesive rings, the stability of the outer frame is ensured, as well as the safety of the entire processing, without the need for overly complex mechanical fixtures.

[0020] 4. This method is simple to operate, has low cost, is suitable for mass production, and can significantly improve production efficiency. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 : Schematic diagram of the outer frame protection method for preventing the edge collapse of parts during the polishing process described in this invention; Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figure 1 As shown,

[0025] Example 1:

[0026] Taking an aluminum alloy part as an example, the unmachined surface of the part is flat, with dimensions of 100mm × 50mm × 5mm. After flat machining on a grinding machine, the width of the collapsed edge of the part was measured to be 0.2mm. Based on this data, the inner edge shape of the outer frame was designed to be consistent with the unmachined surface of the part. The outer frame thickness is 5mm, the minimum distance between the outer edge and the edge of the part is 0.3mm, and aluminum alloy material with the same hardness as the part was selected.

[0027] The outer frame is connected to the non-machined surface of the part using a hot melt adhesive ring. The melting temperature of the hot melt adhesive is set to 100℃, the thickness of the adhesive ring is 2mm, and the width is 1mm. Then, it is placed in a grinding machine for overall grinding. During the grinding process, the flatness of the entire structure is measured and controlled to ensure that the thickness of the part, the outer frame, and the adhesive ring are consistent.

[0028] Finally, the entire assembly was heated to the melting point of the hot melt adhesive at 100°C. The outer frame and adhesive ring were then removed. After cooling to room temperature, any remaining adhesive ring was removed, successfully preventing the parts from collapsing during the polishing process.

[0029] Example 2:

[0030] Taking a stainless steel part as an example, the part is 10mm thick, and the unmachined surface is circular. After processing on a grinding machine, the width of the collapsed edge is measured to be 0.3mm. The outer frame is made of stainless steel, and the inner edge shape is the same as the unmachined surface of the part. The outer frame is 10mm thick, and the minimum distance between the outer edge and the edge of the part is 0.4mm.

[0031] Using the same hot melt adhesive as in Example 1 for connection, the stainless steel parts were finally protected and processed, avoiding the problem of edge collapse and achieving a better processing effect.

[0032] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A method for protecting the outer frame of a part to prevent edge collapse during polishing, characterized in that, The method includes the following steps: Step 1: Machining parts with planar structures on a grinding machine, and measuring and determining the burr dimensions of the parts; Step 2: Based on the shape of the unmachined surface of the part and the collapsed edge size determined in Step 1, design and manufacture an outer frame structure that is the same as the shape of the unmachined surface of the part. The inner edge of the outer frame matches the shape of the unmachined surface of the part, the thickness of the outer frame is the same as the thickness of the part, the minimum distance between the outer edge of the outer frame and the edge of the part is greater than the collapsed edge width, and the material of the outer frame is selected to be a material with similar or the same hardness as the part. Step 3: Connect the non-machined surface of the part to the outer frame with a hot melt adhesive ring to ensure that the outer frame does not fall off during the entire processing. The melting temperature of the hot melt adhesive ring does not exceed the deformation or cracking temperature of the part, and the thickness of the adhesive ring is greater than the thickness of the part and the outer frame. Step 4: Place the part obtained in step 3 and the outer frame adhesive structure on a grinding machine and perform overall grinding to make the thickness of the part, adhesive ring and outer frame consistent, and at the same time measure its flatness; Step 5: Heat the entire structure to the melting point of the hot melt adhesive, remove the outer frame and adhesive ring, and remove any remaining adhesive ring after cooling to room temperature to prevent the parts from collapsing at the edges.

2. The method according to claim 1, characterized in that, The thickness of the hot melt adhesive ring is 1-2 mm, and the hardness of the adhesive layer is not less than 10% of the hardness of the part material. The width of the adhesive ring is between 0.5 and 1.5 mm.

3. The method according to claim 1 or 2, characterized in that, The deformation or breakage temperature of the part is the temperature at which the part can maintain its integrity and not undergo morphological changes when cooled to room temperature after being heated to that temperature.

4. The method according to claims 1 to 3, characterized in that, The outer frame is made of aluminum alloy, steel, or their alloys, and has the same or similar hardness as the material of the part.

Images