CN113909598B

CN113909598B - CNC machining method of tool electrode and tool electrode

Info

Publication number: CN113909598B
Application number: CN202111216186.0A
Authority: CN
Inventors: 林琼华; 王辉; 陈寄明
Original assignee: Huizhou Winone Precision Technology Co Ltd
Current assignee: Huizhou Winone Precision Technology Co Ltd
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2022-11-15
Anticipated expiration: 2041-10-19
Also published as: CN113909598A

Abstract

The invention discloses a CNC machining method of a tool electrode, which comprises the following steps: s100, providing a metal piece; s200, roughly machining a metal piece by using CNC (computer numerical control) to manufacture an initial sample piece, wherein the surface of the initial sample piece is provided with a first side area and a second side area; s300, finely processing the initial sample piece by using CNC, which specifically comprises the following steps: s310, processing a first side area; s320 processes a second side region. This application scheme adopts and processes first side region and second side region alone to make injection mold's surface present the outward appearance of sharp angle, satisfied user's requirement.

Description

CNC machining method of tool electrode and tool electrode

Technical Field

The invention relates to the technical field of CNC, in particular to a CNC machining method of a tool electrode and the tool electrode.

Background

The tool electrode is matched with an electric spark machine for use so as to process the injection mould in a discharge corrosion mode.

In the related art, a tool electrode is manufactured by automatically processing a steel plate by using CNC automation equipment, so that the steel plate is processed into the tool electrode corresponding to an injection mold. However, since the CNC automation equipment has certain defects in the machining process of the steel plate, the machined tool electrode has certain defects, for example, a partial area of the surface of the tool electrode cannot better present a sharp corner appearance.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a CNC machining method of a tool electrode and the tool electrode, which can enable the surface of the manufactured tool electrode to have a sharp corner surface.

According to a first aspect of the present invention there is provided a CNC machining method of a tool electrode for making the tool electrode, comprising the steps of:

s100, providing a metal piece of a plate-shaped body;

s200, roughly machining the metal piece by using CNC (computer numerical control) to manufacture an initial sample piece, wherein the initial sample piece is provided with a top surface and two side surfaces, the two side surfaces face opposite directions, the surface of the initial sample piece is provided with a first side area and a second side area, the area of the first side area is smaller than that of the second side area, the edge of the first side area is connected with the edge of the second side area, at least part of the first side area is on the same side as one side surface, and at least part of the second side area is on the same side as the other side surface;

s300, using CNC to finely machine the initial sample piece, specifically comprising the following steps: s310, processing the first side area; s320, processing the second side region: s330, processing the top surface of the initial sample piece; s340, processing the side surface of the initial sample piece; wherein the S340 is over-cut between 0.004mm and 0.006mm more than the S330.

The CNC machining method for the tool electrode has the following beneficial effects that: by adopting the CNC processing method, after an initial sample piece is manufactured, the surface of the initial sample piece is provided with a first side area and a second side area, and the cutter sequentially processes the first side area and the second side area; specifically, when the first side area is machined, the cutter machines the first side area from the upper end of the first side area and from top to bottom, so that the first side area presents a sharp corner appearance; similarly, when the second side area is machined, the cutter machines the second side area from the upper end of the second side area from top to bottom, and thus the first side area presents a sharp corner appearance. It is thus clear that compare and adopt cutter circumferential motion among the prior art to simultaneous processing first side region and second side region, this application scheme adopts first side region of independent processing and second side region, so that the surface of tool electrode presents the outward appearance of sharp angle.

According to some embodiments of the present invention, in S310 and S320, the cutting angle of the tool is 0 degree or 180 degrees.

According to some embodiments of the invention, in said S340, the tool path is to extend between twenty-five to fifty-five percent of the tool diameter; or the tool path is to extend between 0.25mm and 0.50 mm.

According to some embodiments of the invention, the S300 further comprises the steps of: s350, machining the first side region again, wherein the edge of the side face is connected with the edge of the first side region.

According to some embodiments of the invention, in the S350, the machining allowance is less by between 0.005mm and 0.015 mm.

According to some embodiments of the invention, the top surface of the initial sample has an aperture; the CNC machining method further comprises the following steps: s400, finishing the small hole on the top surface of the initial sample piece, and cutting the small hole by 0.005mm to 0.015mm more than the machining allowance.

According to some embodiments of the invention, the CNC machining method further comprises the steps of: s500, chamfering the port of the small hole in the S400, and cutting the hole by 0.005 mm-0.15mm more than the machining allowance.

According to a second aspect of the invention, a tool electrode is disclosed, which is manufactured by the CNC machining method.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention is further described with reference to the following figures and examples, in which:

fig. 1 is an overall flow diagram of a CNC machining method of an embodiment of the invention;

FIG. 2 is a schematic structural diagram of a roughly machined metal part according to an embodiment of the present invention;

FIG. 3 is a partial schematic view of FIG. 2;

FIG. 4 is a schematic flow chart of the fine machining of the initial sample in the CNC machining method according to the embodiment of the invention;

fig. 5 is a schematic flow chart illustrating rough machining of a metal part in the CNC machining method according to the embodiment of the present invention.

Reference numerals:

a metal piece 10;

an initial sample 100, a first side region 110, a second side region 120, a top surface 130, an aperture 131, a side surface 140.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings only for the convenience of description of the present invention and simplification of the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present numbers, and the above, below, within, etc. are understood as including the present numbers. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The invention discloses a CNC machining method of a tool electrode, which is used for manufacturing the tool electrode, wherein the tool electrode is used for manufacturing an injection mold of a mobile phone shell. Referring to fig. 1 to 4, the cnc machining method includes the steps of: s100 providing a metal piece 10; s200, roughly machining the metal member 10 by using CNC to manufacture an initial sample 100, wherein the surface of the initial sample 100 has a first side region 110 and a second side region 120 (refer to fig. 2 and 3); s300, using the CNC to finely machine the initial sample piece 100, specifically comprising the following steps: s310 processing the first side region 110; s320 processes the second side region 120.

By adopting the CNC processing method, after the initial sample 100 is manufactured, the shape of the initial sample 100 substantially conforms to the shape of the required tool electrode, the surface of the initial sample 100 has a first side region 110 and a second side region 120, and the tool sequentially processes the first side region 110 and the second side region 120; specifically, when the first side region 110 is machined, the cutter machines the first side region 110 from the upper end of the first side region 110 and from top to bottom, so that the first side region 110 presents a sharp corner appearance; similarly, when the second side region 120 is machined, the tool machines the second side region 120 from the top of the second side region 120 and from top to bottom, so that the first side region 110 has a favorable appearance. It is thus clear that, compare and adopt cutter circumferential motion among the prior art to simultaneous processing first side region 110 and second side region 120, this application scheme adopts first side region 110 of independent processing and second side region 120, so that the border on the surface of tool electrode presents the outward appearance of sharp angle, has satisfied user's requirement.

It should be noted that the first side region 110 and the second side region 120 are located at the edge of the initial sample 100 or close to the edge of the initial sample 100.

In some embodiments, the cutting angle of the tool is 0 degree or 180 degrees in S310 and S320. Specifically, in the space system where the metal piece 10 is placed, after the tool roughly processes the metal piece 10, the initial sample piece 100 is vertically placed in the space system. The space system has an X-axis, a Y-axis and a Z-axis, wherein the X-axis is horizontally disposed and is perpendicular to the side 140 of the initial sample 100, i.e. consistent with the thickness direction of the initial sample 100; the Y axis is horizontally disposed and is disposed parallel to the side 140 of the initial sample 100, i.e., in the same direction as the width direction of the initial sample 100; the Z-axis is vertically disposed to coincide with the height of the original sample 100, i.e., to coincide with the length direction of the original sample 100. When the cutter processes the first side region 110 and the second side region 120 of the initial sample 100, the cutter employs a d3r1.5 cutter, the cutting angle of the cutter is 0 degree or 180 degrees, that is, the cutting angle is the direction of the Y axis, the distance between the cutters is fine, and the distance between each cutter is uniformly distributed, thereby preventing the surface of the initial sample 100 from presenting coarse cutting lines.

In some embodiments, referring to fig. 1 and 5, S200 includes the following steps: s210, roughing the metal piece 10; s220, performing light irradiation on the metal piece 10; s230, finishing the metal part 10 to manufacture an initial sample 100. Specifically, firstly, a rough machining tool is used for carrying out first-step machining on metal, and a sample piece with a preliminary outline is manufactured on a metal piece 10; secondly, a cutter of R1.5 is adopted to perform middle polishing on the sample piece processed in the previous step, and at the moment, compared with a tool electrode, the sample piece is left with 0.07mm of finish polishing; finally, the sample piece from the previous step is machined by means of a D8-edge cut, which now leaves a margin of between 0.025mm and 0.035mm compared to the tool electrode, which is designated as the initial sample piece 100.

By adopting the above scheme, the metal sample piece is processed by adopting roughing, middle light and finishing light in sequence, so that the initial sample piece 100 with the allowance between 0.025mm and 0.035mm is gradually prepared, the sample piece is processed finely in the following process, and the initial sample piece 100 has the size and the appearance of the tool electrode.

In some embodiments, referring to fig. 1 and 4, the area of the first side region 110 is smaller than the area of the second side region 120, the edge of the first side region 110 is connected with the edge of the second side region 120, and step S320 is after step S310. Specifically, the tool first machines a first side region 110 with a smaller area, and burrs generated by the first side region 110 move from the edge of the first side region 110 to a second side region 120; the cutter then machines a second side area 120 with a larger area, burrs generated in the second side area 120 move to the first side area 110 from the edge of the second side area 120, and the burrs generated in the machining of the first side area 110 return to the first side area 110 again; finally, the burrs of the first side region 110 are removed. By adopting the above scheme, burrs generated by machining the first side area 110 and the second side area 120 by the cutter are concentrated in the first side area 110, and the area of the first side area 110 relative to the second side area 120 is smaller, so that the burrs are conveniently removed.

In some embodiments, the surface of the initial sample 100 has a top surface 130 and a side surface 140, and S300 further includes the following steps: s330, processing the top surface 130 of the initial sample 100; s340, processing the side surface 140 of the initial sample 100, wherein the top surface 130 and the side surface 140 are processed by the same tool, so as to further obtain the proximity to the desired tool electrode.

Further, the over-cutting of S340 is 0.004mm to 0.006mm more than that of S330, and the height of the cutter and the height of the metal piece 10 are required to be adjusted when the cutter is used for processing a product, so that the cutter can accurately process the top of the product; however, due to equipment tolerances or tool wear, the machining of the side 140 requires between 0.004mm to 0.006mm more overcut than the machining of the top to ensure that the side 140 can be machined accurately.

In some embodiments, S300 further comprises the steps of: s350 repeatedly climbs the sharp corner face of the first side region 110, wherein the side face 140 and the first side region 110 are located on the same side of the initial sample 100, and the edge of the side face 140 and the edge of the first side region 110 are integrally arranged, that is, the first side region 110 is located between the side face 140 and the second side region 120, as seen from above, after the processing in S340 is completed, the burr generated by the processing of the side face 140 moves to the first side region 110 from the edge of the side face 140.

In summary, the burrs generated by the processing of the first side region 110, the second side region 120 and the side surface 140 are all located in the first side region 110, so that the tool climbs the sharp corner surface of the first side region 110 again, and the burrs of the first side region 110 are removed better. As can be seen, the above-described deburring steps are employed to facilitate deburring of the initial sample 100.

Further, in S350, the milling amount is less than the machining allowance by 0.005mm to 0.015mm, specifically, the cutter deburs the corresponding area of the land, which is equivalent to milling the same allowance area twice, and the area is easily over-cut, so that the milling amount is less than 0.005mm to 0.015mm when the cutter is used for cutting, thereby avoiding the over-cutting of the area by the cutter.

In some embodiments, in S340, the tool path extends between twenty-five percent and fifty-five percent of the tool diameter, that is, the tool path extends between 0.25mm and 0.50mm, so that the feed point of the tool path is located outside the tool, and thus, when the tool machines the side surface 140 of the initial sample 100, no tool mark is generated each time the tool enters the side surface 140 of the initial sample 100, thereby ensuring the appearance of the initial sample 100 after machining; meanwhile, the cutter path is within the range, so that the phenomenon that the distance between the cutter feeding point of the cutter and the initial sample piece 100 is far is avoided, the cutter path of the cutter has a long reactive distance, the cutter does not process a product in the reactive distance movement, and the CNC machining efficiency is reduced.

In some embodiments, the top surface 130 of the initial sample 100 has an aperture 131; the CNC machining method further comprises the following steps: s400 finishing the small hole 131 of the top surface 130 of the initial sample 100, wherein the excess is between 0.005mm and 0.015mm more than the process margin. Specifically, in the process of finishing the small hole 131, due to the error of the equipment or the cutter, the cutter needs to over-cut between 0.005mm and 0.015mm, so as to avoid the insufficient machining of the small hole 131.

Further, the CNC machining method further comprises the following steps: s500 chamfers the port of the eyelet 131 in S400. Due to the error between the tool and the equipment, the tool in the step S500 cannot be precisely butted with the tool in the step S400, and therefore, the machining allowance is increased by between 0.005mm and 0.015mm in the step S500. Specifically, the cutter of R0.3 climbs the R angle of hole limit, and the cutter is raised 0.005mm to 0.015mm, and the cutter can not touch the finish plane that S400 produced to avoid producing and connect the sword seal.

According to a second aspect of the invention, a tool electrode is disclosed, which is manufactured by the CNC machining method. Compared with the prior art in which a cutter moves circumferentially to machine the first side region 110 and the second side region 120 simultaneously, the scheme of the application adopts the method of machining the first side region 110 and the second side region 120 separately, so that the edge of the surface of the tool electrode presents a sharp-angled appearance, and the requirements of a user are met.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

Claims

1. A CNC machining method of a tool electrode is used for manufacturing the tool electrode, and is characterized by comprising the following steps:

s100, providing a metal piece of a plate-shaped body;

2. The CNC machining method for the tool electrode according to the claim 1, characterized in that, in the S310 and the S320, the cutting angle of the cutter is 0 degree or 180 degrees.

3. The CNC machining method for the tool electrode according to claim 1, wherein in the S340, the tool path is to extend between twenty-five to fifty-five percent of the tool diameter; or the tool path is to extend between 0.25mm and 0.50 mm.

4. The CNC machining method of a tool electrode according to claim 1, wherein the S300 further includes the steps of: s350, machining the first side region again, wherein the edge of the side is connected with the edge of the first side region.

5. The CNC machining method of a tool electrode, according to claim 4, wherein in the step S350, the machining allowance is reduced by 0.005mm to 0.015 mm.

6. The CNC machining method of tool electrode according to claim 1,

the top surface of the initial sample piece is provided with a small hole;

the CNC machining method further comprises the following steps: s400, finishing the small holes on the top surface of the initial sample piece, and cutting by 0.005mm to 0.015mm more than the machining allowance.

7. The CNC machining method of the tool electrode according to the claim 6, characterized in that, the CNC machining method further comprises the steps of: s500, chamfering the port of the small hole in the S400, and cutting the small hole by 0.005 mm-0.15mm more than the machining allowance.

8. A tool electrode made by the CNC machining method of any one of claims 1 to 7.