CN112100754A - Processing method of constant-width chamfer - Google Patents
Processing method of constant-width chamfer Download PDFInfo
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- CN112100754A CN112100754A CN202010778866.0A CN202010778866A CN112100754A CN 112100754 A CN112100754 A CN 112100754A CN 202010778866 A CN202010778866 A CN 202010778866A CN 112100754 A CN112100754 A CN 112100754A
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- 238000003672 processing method Methods 0.000 title claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims abstract description 64
- 238000012545 processing Methods 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 24
- 238000003754 machining Methods 0.000 claims description 7
- 230000008602 contraction Effects 0.000 claims description 3
- 238000012805 post-processing Methods 0.000 claims description 3
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- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The invention relates to a processing method of a chamfer with equal width, which comprises the following steps: 3D modeling is carried out on the entity of the electronic product appearance piece which is not subjected to the equal-width chamfering; extracting a sheet body from the chamfer surface to be processed of the initial model; performing simulated cutting on the sheet body by using a cutter to form a processing track; converting the processing track into a first curve, and loading the first curve onto an initial model; the method comprises the following steps of performing surface cutting processing on an entity of an electronic product appearance part which is not subjected to equal-width chamfering by using a cutter according to a first curve to form a formed equal-width chamfering, wherein the cutter comprises a conical cutting edge, the vertex of the conical cutting edge corresponds to one end line of the equal-width chamfering, and the outer edge of the bottom surface of the conical cutting edge corresponds to the other end line of the equal-width chamfering; the radius of the bottom surface of the conical cutting edge is equal to the design distance of the chamfer angle along the direction vertical to the side wall, and the processing precision is improved.
Description
Technical Field
The invention relates to the technical field of processing of electronic product appearance parts, in particular to a processing method of a chamfer with equal width.
Background
With the pursuit of the public for the texture, appearance and performance of the appearance of 3C electronic products (the 3C electronic products generally refer to computers, tablet computers, mobile phones, digital cameras, walkmans, electronic dictionaries, video players, digital audio players, etc.), in recent years, various industries have pursued and designed novelty and innovation of the product appearance to the utmost extent so as to attract the attention of consumers. At present, the appearance of a product generally has a chamfer design, so that how to refine the chamfer is achieved for manufacturing enterprises, and the chamfer processing yield and efficiency are improved, which becomes a difficult problem troubling the enterprises.
In the prior art, as shown in fig. 1 and fig. 2, an inclined chamfer 13 is provided at a top end of a sidewall of an exterior piece 100 of an electronic product, the conventional cutting process is slow, and a design distance of the chamfer 13 in a direction perpendicular to the sidewall is 0.3, but in an actually formed structure, the distance is generally 0.32 to 0.35, and there is a difference in external dimensions of 0.02 to 0.05, and the process precision needs to be improved.
Disclosure of Invention
Based on the above, the invention provides a method for processing a chamfer with equal width, which aims to solve the technical problems in the prior art.
The technical scheme of the invention is as follows: the processing method of the chamfer with the same width comprises the following steps:
performing 3D modeling on an entity of the electronic product appearance part which is not subjected to the equal-width chamfering to obtain an initial model, wherein the initial model comprises a bottom wall and a side wall which is bent and extended from the edge of the bottom wall to the direction far away from the bottom wall and is vertical to the bottom wall, and a chamfering surface to be processed is arranged on one side of the side wall far away from the bottom wall;
extracting geometric characteristics of the chamfer surface to be processed of the initial model to obtain a sheet body model;
utilizing a cutter to perform simulated cutting on the sheet body model to form a machining track, wherein the cutter comprises a cutter head and a cutter shaft connected with the cutter head, the cutter head comprises a conical cutter edge, the vertex of the conical cutter edge corresponds to one end line of the formed chamfer with the same width, the outer edge of the bottom surface of the conical cutter edge corresponds to the other end line of the formed chamfer with the same width, and the radius of the bottom surface is equal to the width of the projection of the chamfer on the plane of the bottom wall along the direction vertical to the bottom wall;
converting the processing track into a first curve, and loading the first curve onto the initial model;
and performing surface cutting processing on the entity of the electronic product appearance piece which is not subjected to the equal-width chamfering by using the cutter according to the first curve so as to form the formed equal-width chamfering.
Preferably, the 3D modeling of the entity of the electronic product appearance part which is not chamfered with the same width to obtain an initial model includes:
and 3D modeling the entity of the electronic product appearance piece without the equal-width chamfer by using 3D mapping software to obtain an initial model, wherein the 3D mapping software comprises one of UG, SolidWorks, Invertor or ProE.
Preferably, the converting the processing track into a first curve, and the loading the first curve onto the initial model includes:
converting the processing track into points through post-processing, and performing curve construction through the points to form the first curve;
wrapping the first curve to the initial model using a wrapping function in a UG modeling tool.
Preferably, the included angle between the central axis of the conical cutting edge and the generatrix is 45 °.
Preferably, the cutter head further comprises a supporting column connected to the bottom surface of the conical cutting edge, and the radius of the supporting column is the same as that of the bottom surface of the conical cutting edge; the cutter is characterized by further comprising a circular truncated cone-shaped connecting body connected with the supporting column and the cutter shaft, the radius of one end, close to the conical cutting edge, of the circular truncated cone-shaped connecting body is the same as the radius of the bottom surface of the conical cutting edge, the radius of one end, far away from the conical cutting edge, of the circular truncated cone-shaped connecting body is the same as the radius of the cutter shaft, and the included angle between the central shaft of the circular truncated cone-shaped connecting body and a bus is 20 degrees.
Preferably, the rotating speed of the cutter is 1500 r/min-20000 r/min.
Preferably, after the converting the processing track into the first curve and loading the first curve onto the initial model, the method further includes:
simultaneously carrying out outward expansion extension and inward contraction extension on the first curve in a direction away from the first curve at a preset angle to form an equiangular curved surface;
solving an intersection line of the equal-angle curved surface and the surface of the initial model, wherein the two obtained curves are two end lines of the formed equal-width chamfer respectively, and a curved surface area between the two end lines on the equal-angle curved surface is a chamfer surface of the formed equal-width chamfer;
and 3D modeling is carried out on the entity of the electronic product appearance piece subjected to the equal-width chamfering according to the initial model, the two end lines of the formed equal-width chamfering and the chamfer face of the formed equal-width chamfering, so as to obtain a formed entity model.
Preferably, the step of simultaneously extending the first curve in an outward direction and extending the first curve in an inward direction away from the first curve at a predetermined angle to form an equiangular curved surface includes:
and generating the equiangular curved surface by utilizing the first curve through a regular extension function in a UG modeling tool, wherein the regular type of the length rule in the regular extension function is constant and the value of the length rule is a first constant value, and the regular type of the angle rule is constant and the value of the angle rule is a second constant angle.
Preferably, the tool is perpendicular to the bottom wall during the cutting process of the constant width chamfer.
Preferably, the sheet model comprises a first sheet corresponding to the contour of one side of the side wall far away from the bottom wall and a second sheet corresponding to the contour of one side of the side wall facing outwards and connected with the first sheet.
The invention has the beneficial effects that: the invention relates to a processing method of an equal-width chamfer, which comprises the following steps: 3D modeling is carried out on the entity of the electronic product appearance piece which is not subjected to the equal-width chamfering; extracting a sheet body from the chamfer surface to be processed of the initial model; performing simulated cutting on the sheet body by using a cutter to form a processing track; converting the processing track into a first curve, and loading the first curve onto an initial model; the method comprises the following steps of performing surface cutting processing on an entity of an electronic product appearance piece which is not subjected to equal-width chamfering by using a cutter according to a first curve to form a formed equal-width chamfering, wherein the cutter comprises a conical cutting edge, the vertex of the conical cutting edge corresponds to one end line of the formed equal-width chamfering, and the outer edge of the bottom surface of the conical cutting edge corresponds to the other end line of the formed equal-width chamfering; and the radius of the bottom surface of the conical cutting edge is equal to the design distance of the chamfer angle along the direction vertical to the side wall, the size difference of the design distance in an actual molding structure is small, and the processing precision is improved.
Drawings
Fig. 1 is a perspective view of an exterior part of an electronic product according to the present invention;
FIG. 2 is a drawing showing the dimension of an electronic product appearance part processed by a method in the prior art;
FIG. 3 is a top view of the exterior piece of the electronic product shown in FIG. 1;
FIG. 4 is a cross-sectional view taken along A-A of the exterior of the electronic device shown in FIG. 3;
FIG. 5 is a schematic view of a tool in the method for processing a constant-width chamfer of the present invention;
FIG. 6 is an enlarged view of the tool shown in FIG. 5 at point I;
FIG. 7 is a schematic structural diagram of an initial model obtained in the first step of the method for processing constant-width chamfers according to the present invention;
FIG. 8 is a schematic view of a second step in the method for processing a constant-width chamfer according to the present invention;
FIG. 9 is a schematic structural diagram of the sheet model obtained in step two of the method for processing equal-width chamfers of the present invention;
FIG. 10 is a schematic view of the third step in the method for processing a constant-width chamfer of the present invention;
FIG. 11 is a schematic diagram of step four and step five of the method for processing constant-width chamfers of the present invention;
FIG. 12 is a schematic view of the constant-width curved surface obtained in step five of the method for processing a constant-width chamfer of the present invention;
fig. 13 is a flowchart of a method for processing a constant-width chamfer according to the present invention.
The meaning of the reference symbols in the drawings is:
100-electronic product appearance piece; 11-a bottom wall; 12-a side wall; 13-chamfering with equal width; 13 a-first end line; 13 b-a second end line; 200-initial model; 14-chamfering surface to be processed; 300-a sheet model; 31-a first tablet; 32-a second tablet; 400-cutting tool; 41-a cutter head; 411-a conical blade; 4 a-vertex; 4 b-bottom surface; 4 c-bus bar; 4 d-central axis; 412-support column; 42-cutter shaft; 43-a truncated cone shaped connector; 33-machining a track; 34-a first curve; 35-equal angle curved surface.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
For convenience of description, the electronic product exterior part 100 is described first, and as shown in fig. 1, fig. 3 and fig. 4, the electronic product exterior part 100 according to an embodiment of the present invention includes a bottom wall 11 and a side wall 12 extending from an edge of the bottom wall 11 to a direction away from the bottom wall 11 and perpendicular to the bottom wall 11, wherein a side of the side wall 12 away from the bottom wall 11 is provided with a chamfer 13 with an equal width. The width chamfers 13 form one turn around the side wall 12, the width chamfers 13 include a first end line 13a and a second end line 13b which are oppositely arranged, and the forming chamfer surfaces of the width chamfers 13 are curved surfaces.
Referring to fig. 1 and fig. 3 to 13, an embodiment of the present invention provides a method for processing a constant-width chamfer, including the steps of:
and S1, performing 3D modeling on the entity of the electronic product appearance piece without the equal-width chamfer to obtain the initial model 200.
In order to find out a machining track (tool path track) of a tool machining product entity, firstly, 3D modeling needs to be performed on an electronic product appearance piece which is not subjected to equal-width chamfering, please refer to fig. 7, a structure of an obtained initial model 200 is similar to that of the electronic product appearance piece 100, the initial model 200 includes a bottom wall 11 and a side wall 12 which is bent and extended from an edge of the bottom wall 11 to a direction far away from the bottom wall 11 and is perpendicular to the bottom wall 11, a chamfer surface 14 to be machined is arranged on one side of the side wall 12 far away from the bottom wall 12, and the chamfer surface 14 is subjected to equal-width chamfering to form an equal-width chamfer 13.
In this embodiment, the 3D modeling is performed in 3D cartographic software. Further, the 3D mapping software may be one of UG, SolidWorks, Invertor, ProE or other 3D mapping software in general.
S2, performing geometric feature extraction operation on the chamfer surface 14 to be processed of the initial model 200 to obtain the sheet body model 300.
Referring to fig. 8 and 9, a sheet is extracted from the chamfer 14 to be machined, so as to obtain a sheet model 300, where the sheet model 300 includes a first sheet 31 corresponding to a contour of a side of the side wall 12 away from the bottom wall 11, and a second sheet 32 corresponding to a contour of a side of the side wall 12 facing outward and connected to the first sheet 31.
S3, a simulated cutting is performed on the sheet model 300 using the cutter 400 to form the processing path 33.
In this embodiment, the simulated cutting can be realized by a UG processing function, please refer to fig. 6 and 7, in which the cutter 400 includes a cutter head 41 and a cutter shaft 42 connected to the cutter head 41, the cutter head 41 includes a conical cutting edge 411 and a support column 412, a vertex 4a of the conical cutting edge 411 corresponds to a first end line 13a of the formed constant-width chamfer 13, an outer edge of a bottom surface 4b of the conical cutting edge 411 corresponds to a second end line 13b of the formed constant-width chamfer 13, a length of a generatrix 4c of the conical cutting edge 411 is equal to a chamfer width of the constant-width chamfer 13, a radius of the bottom surface 4b is equal to a projection width of the constant-width chamfer 13 on a plane of the bottom wall 11 along a direction perpendicular to the bottom wall 11, and the projection width is a design distance of the chamfer 13 in the direction perpendicular to the side wall 12. The supporting column 412 is connected to the bottom surface 4b of the conical cutting edge 411, and the radius of the supporting column 412 is the same as that of the bottom surface 4b of the conical cutting edge 411.
In this embodiment, the central axis 4d of the conical blade 411 forms an angle of 45 ° with the generatrix 4 c. Further, the cutting tool 400 further includes a circular truncated cone-shaped connecting body 43 connecting the supporting column 412 and the cutter shaft 42, a radius of one end of the circular truncated cone-shaped connecting body 43 close to the conical cutting edge 411 is the same as a radius of the bottom surface 4b of the conical cutting edge 411, a radius of one end of the circular truncated cone-shaped connecting body 43 far from the conical cutting edge 411 is the same as a radius of the cutter shaft 42, and an included angle between a central axis 4d (the same as the central axis of the conical cutting edge 411) of the circular truncated cone-shaped connecting body 43 and a bus 4c is 20 °.
Fig. 8 is a schematic front view of the wafer model 300, fig. 9 is a schematic rear view of the wafer model 300, and the simulated cutting process is performed on the side where the first and second wafers 31 and 32 are attached to the initial model 200 (i.e., the rear side of the wafer model 300), the first and second wafers 31 and 32 shown in fig. 8 are separated from the initial model 200, and turned over to obtain the wafer model 300 shown in fig. 9, and then the simulated cutting is performed. Referring to fig. 10, in the simulated cutting process, a tool model is obtained by performing 3D modeling on the tool 400, for convenience of description, the tool model and the tool 400 use the same reference numerals, and simulated cutting is performed on the sheet body model 300 by using the tool model, the vertex 4a of the conical cutting edge 411 is tangent to the first sheet body 31, the outer edge of the bottom surface 4b of the conical cutting edge 411 is tangent to the second sheet body 32, the tool 400 is perpendicular to the bottom wall 11, and the processing path 33 is a cutting path formed by the vertex 4a of the conical cutting edge 411 on the first sheet body 31.
S4, converting the processing path 33 into a first curve 34, and loading the first curve 34 onto the initial model 200.
Since the simulated cutting process in step S3 is performed on the back surface of the tablet body model 300, step S3 separates the tablet body model 300 from the initial model 200, the formed machining path 33 and the first curve 34 converted from the machining path 33 are separated from the initial model 200, and in step S4, the formed first curve 34 is added to the initial model 200 to complete the modeling of the cutting process.
In an optional implementation manner of this embodiment, the processing track 33 is converted into points through post-processing, and a curve is constructed through the points to form the first curve 34; the first curve 34 is wrapped to the initial model 200 using a wrapping function in the UG modeling tool.
And S5, performing 3D modeling on the entity of the electronic product appearance piece subjected to the equal-width chamfering to obtain a molded entity model.
In the present embodiment, please refer to fig. 11 to 12, first, the first curve 34 is extended outwardly and extended inwardly at a predetermined angle in a direction away from the first curve 34 to form an equal angle curved surface 35; then, an intersection line is obtained between the equal-angle curved surface 35 and the surface of the initial model 200, the obtained two curves are respectively a first end line 13a and a second end line 13b of the formed equal-width chamfer 13, and a curved surface area between the first end line 13a and the second end line 13b on the equal-angle curved surface 13 is a chamfer surface of the formed equal-width chamfer 13; then, 3D modeling is performed on the entity of the electronic product appearance piece subjected to the constant-width chamfering according to the initial model 200, the first end line 13a and the second end line 13b of the molded constant-width chamfering 13, and the chamfering face of the molded constant-width chamfering 13, so as to obtain a molded entity model. Specifically, extending the first curve 34 at a predetermined angle to form the equiangular curved surface 35 may be implemented by: the equiangular curved surface 35 is generated by the first curve 34 through a regular extension function in the UG modeling tool, wherein the regular type of the length rule in the regular extension function is constant and the value is a first constant value, and the regular type of the angle rule is constant and the value is a second constant angle, for example, the first constant value may be 2mm, and the second constant angle may be 45 °.
In the embodiment, the first curve 34 is formed through the modeling processing track 33, the equal-angle curved surface 35 is formed through regular extension of the first curve 34, and the formed equal-width chamfer 13 is determined through the intersection line of the equal-angle curved surface 35 and the initial model 200, so that 3D modeling is performed on the entity of the electronic product appearance piece subjected to the equal-width chamfer, and the entity is further referred by technical personnel.
S6, performing surface cutting on the entity of the electronic product appearance piece without performing equal-width chamfering according to the first curve 34 on the initial model 200 by using the cutter 400 to form the formed equal-width chamfer 13.
In step S6, based on the positional relationship between the first curve 34 and the initial model 200, a CNC program is programmed according to the kinematic chain relationship existing between the axes of the specific cutting machine, which can convert the data coordinates of the first curve 34 into the motion of the cutting machine. Inputting the code of the CNC program into a cutting machine tool, arranging the cutter 400 on the cutting machine tool, and driving the cutter 400 to cut the entity of the electronic product appearance piece which is not chamfered with the same width according to the CNC program by the cutting machine tool.
In this embodiment, during the cutting process of the constant-width chamfer, the tool 400 is perpendicular to the bottom wall 11, the vertex 4a of the conical cutting edge 411 corresponds to a first end line 13a of the formed constant-width chamfer 13, and the outer edge of the bottom surface 4b of the conical cutting edge 411 corresponds to a second end line 13b of the formed constant-width chamfer 13. The rotating speed of the cutter 400 is 1500 r/min-20000 r/min.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A processing method of a constant-width chamfer is characterized by comprising the following steps:
performing 3D modeling on an entity of the electronic product appearance part which is not subjected to the equal-width chamfering to obtain an initial model, wherein the initial model comprises a bottom wall and a side wall which is bent and extended from the edge of the bottom wall to the direction far away from the bottom wall and is vertical to the bottom wall, and a chamfering surface to be processed is arranged on one side of the side wall far away from the bottom wall;
extracting geometric characteristics of the chamfer surface to be processed of the initial model to obtain a sheet body model;
utilizing a cutter to perform simulated cutting on the sheet body model to form a machining track, wherein the cutter comprises a cutter head and a cutter shaft connected with the cutter head, the cutter head comprises a conical cutter edge, the vertex of the conical cutter edge corresponds to one end line of the formed chamfer with the same width, the outer edge of the bottom surface of the conical cutter edge corresponds to the other end line of the formed chamfer with the same width, and the radius of the bottom surface is equal to the width of the projection of the chamfer on the plane of the bottom wall along the direction vertical to the bottom wall;
converting the processing track into a first curve, and loading the first curve onto the initial model;
and performing surface cutting processing on the entity of the electronic product appearance piece which is not subjected to the equal-width chamfering by using the cutter according to the first curve so as to form the formed equal-width chamfering.
2. The processing method of the constant-width chamfer of claim 1, wherein the 3D modeling of the entity of the electronic product appearance part which is not chamfered with the constant width is carried out to obtain an initial model, and the method comprises the following steps:
and 3D modeling the entity of the electronic product appearance piece without the equal-width chamfer by using 3D mapping software to obtain an initial model, wherein the 3D mapping software comprises one of UG, SolidWorks, Invertor or ProE.
3. The method for processing the constant-width chamfer according to claim 1, wherein the converting the processing track into a first curve and loading the first curve onto the initial model comprises:
converting the processing track into points through post-processing, and performing curve construction through the points to form the first curve;
wrapping the first curve to the initial model using a wrapping function in a UG modeling tool.
4. The method for processing a constant-width chamfer according to claim 1, wherein the included angle between the central axis of the conical cutting edge and the generatrix is 45 °.
5. The method for processing the constant-width chamfer according to claim 1, wherein the tool bit further comprises a support pillar connected to the bottom surface of the conical cutting edge, and the radius of the support pillar is the same as the radius of the bottom surface of the conical cutting edge; the cutter is characterized by further comprising a circular truncated cone-shaped connecting body connected with the supporting column and the cutter shaft, the radius of one end, close to the conical cutting edge, of the circular truncated cone-shaped connecting body is the same as the radius of the bottom surface of the conical cutting edge, the radius of one end, far away from the conical cutting edge, of the circular truncated cone-shaped connecting body is the same as the radius of the cutter shaft, and the included angle between the central shaft of the circular truncated cone-shaped connecting body and a bus is 20 degrees.
6. The method as claimed in claim 1, wherein the rotation speed of the tool is 1500 to 20000 r/min.
7. The method for processing constant-width chamfers according to claim 1, wherein the converting the processing trajectory into a first curve, and after loading the first curve onto the initial model, further comprises:
simultaneously carrying out outward expansion extension and inward contraction extension on the first curve in a direction away from the first curve at a preset angle to form an equiangular curved surface;
solving an intersection line of the equal-angle curved surface and the surface of the initial model, wherein the two obtained curves are two end lines of the formed equal-width chamfer respectively, and a curved surface area between the two end lines on the equal-angle curved surface is a chamfer surface of the formed equal-width chamfer;
and 3D modeling is carried out on the entity of the electronic product appearance piece subjected to the equal-width chamfering according to the initial model, the two end lines of the formed equal-width chamfering and the chamfer face of the formed equal-width chamfering, so as to obtain a formed entity model.
8. The method for processing a constant-width chamfer according to claim 7, wherein the step of simultaneously performing outward expansion and inward contraction on the first curve in a direction away from the first curve at a predetermined angle to form a constant-angle curved surface comprises:
and generating the equiangular curved surface by utilizing the first curve through a regular extension function in a UG modeling tool, wherein the regular type of the length rule in the regular extension function is constant and the value of the length rule is a first constant value, and the regular type of the angle rule is constant and the value of the angle rule is a second constant angle.
9. The method of claim 1, wherein the tool is perpendicular to the bottom wall during the cutting process of the constant width chamfer.
10. The method for processing the constant-width chamfer according to claim 1, wherein the sheet body model comprises a first sheet body corresponding to the contour of one side of the side wall far away from the bottom wall and a second sheet body corresponding to the contour of one side of the side wall facing outwards and connected with the first sheet body.
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