阅读说明：本技术 采用电火花加工细孔的方法 (Method for machining fine hole by electric spark ) 是由 刘存爱 王倩 杨敏杰 王黄龙 刘涛 于 2021-08-03 设计创作，主要内容包括：本发明公开了一种采用电火花加工细孔的方法,用于加工若干细孔,包含如下步骤：采用磨床,将工件的外形毛坯尺寸加工至预设尺寸；根据待加工的若干细孔的个数、预设位置和参数,设定数控机床的刀轨工作流程和工艺要求,设定电火花加工机床的三个电极的放电立柱间距；采用数控机床加工工件上除若干细孔的预设位置以外的部分,使工件的外观面保留基材的范围为：0.09mm～0.11mm。本发明能够在细孔内产生火花纹,使得细孔硬度高、耐磨、耐蚀并且提高了产品的抗疲劳性能,具有加工效率高的特点,同时,能够保证产品工精度达到±0.005mm,提升了用户产品的竞争力。(The invention discloses a method for processing a plurality of pores by adopting electric spark, which is used for processing the plurality of pores and comprises the following steps: processing the outline blank size of the workpiece to a preset size by adopting a grinding machine; setting the working flow and technological requirements of a tool path of a numerical control machine tool and setting the discharge stand column spacing of three electrodes of an electric spark machine tool according to the number, preset positions and parameters of a plurality of pores to be processed; adopt the digit control machine tool to process the part except the preset position of a plurality of micropores on the work piece, the scope that makes the outward appearance face of work piece remain the substrate does: 0.09mm to 0.11 mm. The invention can generate spark patterns in the pores, so that the pores have high hardness, wear resistance and corrosion resistance, the fatigue resistance of the product is improved, the machining efficiency is high, the product accuracy can reach +/-0.005 mm, and the product competitiveness of users is improved.)

1. A method for machining a plurality of pores by electric discharge machining, comprising the steps of:

processing the outline blank size of the workpiece to a preset size by adopting a grinding machine;

setting a tool path working flow and technological requirements of a numerical control machine tool and setting the discharge column spacing of three electrodes of an electric spark machine tool according to the number, preset positions and parameters of a plurality of pores to be machined, wherein the three discharge electrodes are respectively a first electrode, a second electrode and a third electrode;

adopting the numerical control machine tool to process the parts of the workpiece except the preset positions of the plurality of pores, so that the range of the appearance surface of the workpiece for retaining the base material is as follows: 0.09 mm-0.11 mm;

and the electric discharge machine carries out electric discharge machining on the workpiece.

2. A method of electrodischarge machining a pore as claimed in claim 1, wherein said workpiece is subjected to electric discharge machining by said electrodischarge machine at an angle of 30 ° to a horizontal plane.

3. The method of electric discharge machining pores according to claim 1, wherein the plurality of pores have a hole wall remaining amount of 0.1mm and a bottom surface remaining amount of 0.05mm after the electric discharge machining of the workpiece.

4. A method of electric discharge machining a fine hole according to claim 1, wherein when the electric discharge machine performs electric discharge machining on the workpiece, discharge gaps between the first electrode, the second electrode, and the third electrode and a wall of the fine hole are each 0.05 mm.

5. A method of electric discharge machining a fine hole according to claim 1, wherein when the electric discharge machine performs electric discharge machining on the workpiece, discharge gaps between the first electrode, the second electrode, and the third electrode and a bottom surface of the fine hole are all 0 mm.

6. A method of electric discharge machining a fine hole according to claim 1, wherein the electric discharge machine performs electric discharge machining on the workpiece, comprising the substeps of:

the first electrode performs electric discharge machining on the workpiece;

the second electrode carries out electric discharge machining on the workpiece;

and the third electrode carries out electric discharge machining on the workpiece until the workpiece is machined to be in a qualified size.

7. The method of electric discharge machining a fine hole according to claim 5, wherein when the first electrode performs electric discharge machining on the workpiece, a remaining margin of a hole wall of the plurality of fine holes is 0.02mm, and a remaining margin of a bottom surface of the plurality of fine holes is 0.05 mm.

8. The method of electric discharge machining of fine holes according to claim 5, wherein when the second electrode performs electric discharge machining on the workpiece, a remaining amount of a hole wall of the plurality of fine holes is not more than 0.02 mm.

Technical Field

The invention relates to the technical field of electric discharge machining, in particular to a method for machining a pore by adopting electric spark.

Background

Edm (electrical Discharge machining), i.e., electrical Discharge machining, is a process for removing excess metal based on the phenomenon of electroerosion during pulsed spark Discharge between an electrode and a workpiece to achieve predetermined machining requirements for the size, shape, and surface quality of the part. However, in the prior art, the pore diameter of the fine pores processed by EDM is more than 0.7mm, the depth of the fine pores is less than 5.0mm, the processed pore diameter shape and size precision are poor, only a small amount of fine pores can be simultaneously processed by electric discharge, the processing efficiency is low, the electric discharge carbon deposition is easy to form, and the product rejection rate is high.

Disclosure of Invention

According to an embodiment of the present invention, there is provided a method for machining a plurality of pores by using an electric discharge machining, including the steps of:

processing the outline blank size of the workpiece to a preset size by adopting a grinding machine;

setting the working flow and technological requirements of a tool path of a numerical control machine tool and the discharge column spacing of three electrodes of an electric spark machine tool according to the number, preset positions and parameters of a plurality of pores to be processed, wherein the three discharge electrodes are respectively a first electrode, a second electrode and a third electrode;

adopt the digit control machine tool to process the part except the preset position of a plurality of micropores on the work piece, the scope that makes the outward appearance face of work piece remain the substrate does: 0.09 mm-0.11 mm;

the electric discharge machine performs electric discharge machining on the workpiece.

Further, when the electric discharge machine tool carries out electric discharge machining on the workpiece, the included angle between the workpiece and the horizontal plane is 30 degrees.

Further, after the electric discharge machining tool performs electric discharge machining on the workpiece, the remaining allowance of the hole walls of the plurality of pores is 0.1mm, and the remaining allowance of the bottom surfaces of the plurality of pores is 0.05 mm.

Further, when the electric discharge machine tool carries out electric discharge machining on the workpiece, the discharge gaps among the first electrode, the second electrode, the third electrode and the hole wall of the pore are all 0.05 mm.

Further, when the electric discharge machine tool performs electric discharge machining on the workpiece, the discharge gaps between the first electrode, the second electrode, the third electrode and the bottom surface of the pore are all 0 mm.

Further, the electric discharge machine for electric discharge machining of a workpiece includes the substeps of:

the first electrode carries out discharge machining on the workpiece;

the second electrode carries out discharge machining on the workpiece;

and the third electrode carries out electric discharge machining on the workpiece until the workpiece is machined to be in a qualified size.

Further, when the first electrode performs electric discharge machining on the workpiece, the remaining allowance of the hole walls of the plurality of fine holes is 0.02mm, and the remaining allowance of the bottom surfaces of the plurality of fine holes is 0.05 mm.

Further, when the second electrode performs electric discharge machining on the workpiece, the remaining allowance of the hole walls of the plurality of fine holes is not more than 0.02 mm.

According to the method for machining the fine holes by adopting the electric spark, spark patterns can be generated in the fine holes, so that the fine holes are high in hardness, wear-resistant and corrosion-resistant, the fatigue resistance of products is improved, the method has the characteristic of high machining efficiency, meanwhile, the accuracy of the products can be guaranteed to be +/-0.005 mm, and the competitiveness of user products is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and are intended to provide further explanation of the claimed technology.

Drawings

FIG. 1 is a flow chart of a method of machining pores using an electric discharge according to an embodiment of the present invention;

fig. 2 is a sub-flowchart of S4 in fig. 1.

Detailed Description

The present invention will be further explained by describing preferred embodiments of the present invention in detail with reference to the accompanying drawings.

First, a method for machining a plurality of pores by using an electric discharge machining according to an embodiment of the present invention will be described with reference to fig. 1 to 2, which have a wide application range.

As shown in fig. 1, the method for processing fine holes by electric discharge machining according to the embodiment of the present invention includes the steps of:

in S1, as shown in fig. 1, the outer shape blank of the workpiece is machined to a predetermined size by using a grinder, in this embodiment, the workpiece is made of steel material with a model of S136, and the rockwell hardness range is HRC 50-52.

In S2, as shown in fig. 1, the tool path work flow and the process requirements of the numerical control machine tool are set according to the number, preset positions and parameters of the plurality of pores to be processed, the distance between the discharge columns of the first electrode, the second electrode and the third electrode of the electric discharge machine tool is set, the deformation of the discharge columns is prevented, and the electric discharge machine tool is a charmier electric discharge machining device in switzerland, so that the stability of discharge is ensured.

Further, in this embodiment, the first electrode, the second electrode, and the third electrode are made of copper, preferably, chromium-copper alloy, and have physical properties of good conductivity, high hardness, wear resistance, explosion resistance, good standing property, no bending of the thinned sheet, and high cracking resistance and softening temperature.

In S3, as shown in fig. 1, the workpiece is machined by the numerical control machine except for the preset positions of the plurality of pores, and the workpiece is discharged with the appearance surface of the workpiece remaining 0.1mm of the base material, that is, with the remaining 0.1mm of iron.

At S4, as shown in fig. 1, the workpiece is subjected to electric discharge machining by an electric discharge machine.

Further, before the workpiece is machined by the electric spark machine tool, the angle of the workpiece is adjusted to enable the included angle between the workpiece and the horizontal plane to be 30 degrees, so that the small holes are vertical; after the electric spark machine tool carries out electric discharge machining on the workpiece, the remaining machining allowance of the hole wall of the pore is 0.1mm, and the remaining allowance of the bottom surface of the pore is 0.05 mm; when the electric spark machine tool carries out electric discharge machining on a workpiece, the discharge gaps among the first electrode, the second electrode and the third electrode and the hole wall of the pore are all 0.05mm, and the discharge gaps among the first electrode, the second electrode and the third electrode and the bottom surface of the pore are all 0 mm; the number of the discharge columns of the first electrode, the second electrode and the third electrode is more than 2000, so that the processing speed and the processing efficiency of the product are improved.

Further, the electric discharge machine for electric discharge machining of a workpiece includes the substeps of:

in S41, as shown in fig. 2, the first electrode first performs electric discharge machining on the workpiece in the vertical direction thereof, without translating the first electrode.

Further, the first electrode is processed in a mode of processing conditions of loss in the pore, the purpose of quickly removing redundant materials is achieved, the processing efficiency is improved, the processing allowance reserved on the pore wall of the pore by the first electrode is 0.02mm, and the processing allowance reserved on the bottom surface of the pore by the first electrode is 0.05 mm.

At S42, as shown in fig. 2, the second electrode performs electric discharge machining on the workpiece in the vertical direction of the workpiece, and at the same time, the second electrode translates to machine the hole wall of the fine hole.

Furthermore, the second electrode is machined in a small-hole low-loss machining condition mode, the specifications of the fine holes are unified, and when the second electrode is used for performing electric discharge machining on the workpiece, the machining allowance of the second electrode for the hole wall of the fine hole is kept to be 0.02 mm.

In S43, as shown in fig. 2, the third electrode performs electric discharge machining on the workpiece in the vertical direction of the workpiece, and at the same time, the third electrode translates to machine the hole wall of the fine hole until an acceptable size is machined.

Furthermore, the third electrode is processed by adopting a processing condition mode with high pore ratio, so that the processing precision is improved, the precision of the pores meets the requirement, the qualification rate of products is improved, the excellent quality is realized, the competitiveness of user products is improved, and fire patterns are generated in the pores, so that the high hardness, wear resistance and corrosion resistance of the pores are ensured, and the fatigue resistance is improved; the three electrodes are used for carrying out discharge machining on the workpiece for three times, so that the machining precision of the pores of the workpiece can reach +/-0.005 mm, meanwhile, the phenomenon that the product is poor in discharge carbon deposition is avoided, the quality of the product is guaranteed, the yield of the product is improved, and the three-electrode discharge machining device has the advantages of being high in machining precision and high in machining efficiency.

In the above, with reference to fig. 1 to 2, the method for processing the fine holes by using the electric spark according to the embodiment of the present invention is described, so that spark patterns can be generated in the fine holes, the fine holes have characteristics of high hardness, wear resistance, corrosion resistance, and improved fatigue resistance of the product, the method has a high processing efficiency, and meanwhile, the product precision can be guaranteed to be ± 0.005mm, and the product competitiveness of users is improved.

It should be noted that, in the present specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.