CN113385759A - Quick flow guide tool electrode and working method - Google Patents
Quick flow guide tool electrode and working method Download PDFInfo
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- CN113385759A CN113385759A CN202110427500.3A CN202110427500A CN113385759A CN 113385759 A CN113385759 A CN 113385759A CN 202110427500 A CN202110427500 A CN 202110427500A CN 113385759 A CN113385759 A CN 113385759A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H3/00—Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
- B23H3/04—Electrodes specially adapted therefor or their manufacture
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
- B23H9/02—Trimming or deburring
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Abstract
The invention discloses a design structure and a working method of a quick flow guiding tool electrode, which comprises three components: an electrode conductor head (10), an electrode conductor column (20) and an electrode insulator (1). The electrode conductor head (10) and the electrode conductor column (20) are combined together in a shrinkage assembly mode, the tail part of the electrode conductor column (20) is connected with the negative pole of a processing power supply, the workpiece (6) is connected with the positive pole of the processing power supply, and then the workpiece (6) with the crossed inner holes (7, 8 and 9) structure is deburred and filleted under the combined action of flowing electrochemical working liquid. The outer surface of the electrode conductor column (20) is provided with an electrode insulator (1) in a small clearance fit mode, the middle of the electrode insulator (1) is provided with a prismatic accelerating and guiding structure (30) and the electrode conductor head is combined with a back-to-back combined frustum structure (10), so that the flow rate of electrochemical working fluid in a burr-containing processing area and a burr-free non-processing area can be accelerated, electrochemical reaction products and heat in the processing process can be quickly brought away, and the original precision and the surface quality of a burr-free non-processing part of a workpiece can be protected from being influenced by the processing process. The invention has the advantages of simple structure, high processing efficiency, long service life of the tool, replaceability and low maintenance cost.
Description
Technical Field
The invention relates to a design structure and a working method of a quick flow guiding tool electrode, which are mainly used for deburring and fillet machining of workpieces with crossed inner hole structures, such as a fuel injection pump body and the like, and belong to the technical field of electrochemical machining.
Background
The fuel injection pump body and other workpieces with crossed inner hole structures generally have burrs at the crossed parts of the inner holes, and the burrs can be removed and filleted by adopting an electrochemical method. In the electrochemical machining process, the electrochemical working fluid flow channel is kept smooth and the flow field is uniform as much as possible, so that the heat generated by the machining products and the reaction is removed as soon as possible. If the flow field distribution of the processing part is not uniform, burrs on the processing surface are not uniformly dissolved, and flow lines and bulges are even generated; the machining product is difficult to remove in time, so that the machining precision, the surface quality and the stability of the machining process are influenced, and short circuit is easy to occur in serious cases, so that the whole machining system is damaged.
The flow field of the electrochemical working fluid requires that a specific working gap must exist between the tool electrode and the inner hole of the workpiece to maintain the electrochemical working fluid to reach the machining part and simultaneously protect the non-burr part of the workpiece which does not need to be machined. The structure and precision of the tool electrode determine the size and shape of the working gap, which in turn directly affects the flow channel form and flow rate of the electrochemical working fluid. The presently disclosed tool electrode design focuses primarily on its insulation and sealing properties, and for electrochemical working fluid flow rates, it is common to increase the working fluid inlet pressure. The method increases the equipment investment cost and the energy consumption, and does not meet the development requirements of production enterprises. The invention designs the tool electrode with the prism and frustum combined structure, and the flow rate of the electrochemical working solution can be obviously improved at lower cost.
Disclosure of Invention
The invention mainly aims at the problems that when the internal cross hole of a fuel injection pump body workpiece is subjected to electrochemical deburring and fillet machining, excessive machining is easy to generate, a tool electrode is easy to generate short circuit, the efficiency is not high and the like, and provides a novel design structure and a working method of the tool electrode. By adopting the technical scheme provided by the invention, the flow rate during electrochemical deburring and fillet machining can be increased, no liquid shortage area exists, the machining efficiency is high, the surface quality is good, the electrode part corresponding to the non-machining area of the workpiece is shielded by adopting the insulator, the original precision and the surface quality of the workpiece are not influenced, the burr removing effect of the machining area is good, the machining precision is high, the electrode does not have short circuit burn, the service life is long, and the maintenance is convenient.
In order to achieve the purpose, the invention adopts the following technical scheme that:
the invention provides a design structure of a quick flow guiding tool electrode, which comprises three components: an electrode conductor head, an electrode conductor post and an electrode insulator.
The invention provides a working method of a quick flow guide tool electrode, which comprises the following steps: the electrode conductor head and the electrode conductor column are combined together in a shrinkage assembly mode, the tail part of the electrode conductor column is connected with the negative pole of a processing power supply, a workpiece is connected with the positive pole of the processing power supply and then acts together with flowing electrochemical working liquid to form a processing loop, and burrs and fillets of the workpiece with a crossed inner hole structure are removed.
The electrode conductor head can be made of materials with good conductivity, such as brass and the like. In order to effectively get rid of the burr and the radius angle of work piece alternately hole, electrode conductor head totality be cylindricly, divide into preceding, well, back three, anterior and rear shrink, and the middle part that is close to work piece processing position is certain arch, forms and leans against formula combination frustum structure, can guarantee that this processing region's ionization efficiency is faster, the burring effect is better, the radius angle precision is higher. Meanwhile, the middle protruding structure is positioned in the center of the processing area, so that the turbulence effect in the flowing process of the electrochemical working solution can be enhanced, and the quick removal of the heat generated by the processing product and the reaction is facilitated.
The electrode conductor head is provided with a hole from the back to the front and is combined with the electrode conductor column by adopting a shrink assembly mode. When the short circuit occurs in the machining process to cause damage to the electrode conductor head, the electrode conductor head can be replaced independently, so that the cost of replacing the electrode integrally is reduced.
The electrode conductor column can be made of materials with good conductivity, easy processing and corrosion resistance, such as 304 stainless steel.
The electrode conductor column is generally cylindrical and is divided into a front part, a middle part and a rear part, and the front part is inserted into an opening at the rear part of the electrode conductor head in a shrinkage assembly mode and is combined with the electrode conductor head; the middle part is combined with the electrode insulator by adopting small clearance fit; the rear part is connected to the electrode wire interface through a fastening bolt and a fixing block, and then is connected to the negative electrode of the processing power supply through a power line.
The outer surface of the electrode conductor column is provided with an electrode insulator in a small clearance fit mode, the middle of the electrode insulator is provided with a prismatic accelerating and guiding structure, the flow speed of electrochemical working liquid in a non-working area can be accelerated, products and heat in the machining process can be quickly brought away, and the shape and the precision of a non-machining part of a workpiece can be protected from being influenced by the machining process.
The electrode insulator can be made of engineering resin, plastic and other materials with good insulativity and certain heat resistance, and is used for shielding an electric field, preventing the electrode conductor column from contacting a non-processing part of a workpiece and protecting the original precision and surface quality of the non-processing part of the workpiece from being influenced by a processing process.
The electrode insulator and the inner hole of the workpiece keep a certain working gap to ensure that the electrochemical working fluid has enough flow velocity and quickly remove the heat generated by the processing products and the reaction.
The electrode insulator is generally cylindrical and is divided into a front part, a middle part and a rear part, the front end face is in close contact with the rear end face of the electrode conductor head, the middle part adopts a prism structure to enhance the flow velocity of electrochemical working fluid, and the rear cylindrical structure provides a sealing surface and is fixed in a sealing cover of the electrochemical working fluid. The seal housing is clamped between the workpiece and the electrochemical working fluid housing such that the tool electrode overall structure is fixed.
The frustum guide surface at the rear part of the electrode insulator provides a flow channel for electrochemical working liquid, so that the electrochemical working liquid can pass through a working gap between a tool electrode and a workpiece, and the frustum guide surface, the sealing cover, the electrochemical working liquid cover and the electrochemical working liquid interface at the rear part of the electrode insulator form a complete processing loop of the electrochemical working liquid.
The electrochemical working solution comprises 20 percent of NaNO3An aqueous solution of a carboxylic acid and a carboxylic acid,the density of the solution is 1250kg/m3The temperature was 28 ℃. The inlet flow rate of the working fluid was 5m/s, and the outlet back pressure was 101,325 Pa. Processing by using a direct current pulse power supply, wherein the voltage is 70V; the minimum value of the unilateral clearance between the tool electrode and the workpiece is 0.07 mm.
The rapid flow guiding tool electrode adopts a counter-flow field to remove burrs and perform fillet machining.
The invention has the beneficial effects that:
according to the rapid flow guide tool electrode, the working end of the electrode conductor head corresponding to the burr processing area is designed into a back-to-back combined frustum structure with two contracted ends and a protruding middle part, the electrode insulator corresponding to the burr-free non-processing area is designed into a prism and frustum combined structure, the liquid outlet flow channel is a gap between the electrode conductor head and the electrode insulator and an inner hole of a workpiece, the flow rate of electrochemical working liquid of the processing area and the non-processing area can be effectively improved, processing products and heat can be taken away rapidly, burr removal efficiency and fillet precision are enhanced, the original size precision and surface quality of the non-processing area are protected, and stray corrosion is avoided; the processing surface quality of the cross part of the inner hole of the workpiece is stable, and the size precision is high. The electrode conductor head is made of brass, so that the conductivity is good; the electrode conductor column is made of 304 stainless steel and is corrosion-resistant; and the electrode insulator is made of polyether-ether-ketone, so that the insulation property is high. The tool electrode has long service life, simple processing, easy replacement and convenient maintenance.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For a better understanding of the features and advantages of the present invention, reference is made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration. Like characters represent like parts throughout the drawings, wherein:
fig. 1 is a schematic view of the working position of the tool electrode.
Fig. 2 is a direction and velocity profile of the flow field around the tool electrode.
Fig. 3 is a schematic view of the general structure of the tool electrode conductor and conductor post.
Fig. 4 is a schematic view of the general structure of the tool electrode insulator.
Fig. 5 is a schematic view of the overall assembly structure of the tool electrode.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the description of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "back", "inner", "outer", etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the drawings, it is only for convenience of description and simplicity of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art will understand the specific meanings of the terms according to specific situations.
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
As shown in fig. 1, the electrode conductor head 10 in the cross-sectional view of fig. 1-1 is located at the intersection of the three holes 7, 8, 9 of the workpiece, i.e., the machining area of the workpiece, and is required to be deburred and rounded. The electrochemical working solution adopted during processing contains NaNO with the concentration of 20%3An aqueous solution having a density of 1250kg/m3The temperature was 28 ℃. The inlet flow rate of the working fluid was 5m/s, and the outlet back pressure was 101,325 Pa. Processing by using a direct current pulse power supply, wherein the voltage is 70V; the minimum value of the unilateral clearance between the tool electrode and the workpiece is 0.07 mm.
As shown in fig. 2, when machining is performed using the counter-flow field, the electrochemical working fluid flows into the machining region from the intersection hole B, C, and flows out of the workpiece from the gap between the intersection hole a and the tool electrode. The direction of the head with colored arrows in fig. 2 indicates the flow direction of the electrochemical working fluid, and the size of the arrows is proportional to the flow velocity of the electrochemical working fluid. As can be seen from the cross-sectional view 2-2 of fig. 2, the initial flow velocity of the electrochemical working fluid in the crossover hole B, C is 5m/s, and the cross-sectional flow area begins to decrease after entering the machining region. According to the continuity equation of flowing liquid, namely the mass conservation law, the liquid flows in the pipeline, and when the flow is the same, the flow speed is faster when the sectional area is smaller. Under the action of a back-to-back combined frustum structure with two contracted ends and a protruded middle at the electrode conductor head, the flow speed of the working fluid is increased by 2 times to 15m/s at the electrode conductor head 10 part, then the working fluid is continuously accelerated to 20m/s at the front part of the electrode insulator 1 until the maximum speed of 30m/s is reached at the prismatic speed-increasing surface 30 of the electrode insulator, and the speed is maintained until the flow speed starts to gradually decrease to 18m/s after the working fluid leaves the prismatic speed-increasing surface 30 of the electrode insulator until the working fluid flows out of a workpiece. The average speed of the flow field around the tool electrode adopting the prism speed-increasing structure is 10.625m/s, which is 1.16 times that of the tool electrode not adopting the prism speed-increasing structure, or the processing efficiency can be improved by 14%.
As shown in fig. 3, the rapid flow guiding structure tool electrode includes the following components:
the electrode conductor head 10 is a cylindrical back-to-back combined frustum structure part with two contracted ends and a protruding middle part. The material of the electrode conductor head is not particularly limited, but a metal material having good conductivity is preferable, and examples thereof include copper, aluminum, and tungsten. The resistivities rho of copper, aluminum and tungsten at 20 ℃ are respectively 1.75X10-8Ωm、2.83X10-8Ωm、5.48X10-8Ωm。
The diameters D1 and D2 of the front portion of the electrode lead are not particularly limited, and may be set to 1 to 2mm and 2 to 3mm, respectively, for example, for a workpiece inner hole having a diameter of 3 mm. The front diameter ratio (D2/D1) of the electrode conductor head is preferably 0.3 to 0.7, more preferably about 0.5.
The diameter D3 of the rear portion of the electrode lead is not particularly limited, and may be, for example, 1 to 2mm with respect to a workpiece inner hole having a diameter of 3 mm. The rear diameter ratio (D3/D1) of the electrode lead is preferably 0.5 to 0.9, more preferably about 0.7.
The size relation among the diameters D1, D2 and D3 in the characteristic dimension of the electrode conductor head is as follows: d1> D3> D2 to form a back-to-back combined frustum structure. According to the continuity equation of flowing liquid, namely the mass conservation law, the liquid flows in the pipeline, and when the flow is the same, the flow speed is faster when the sectional area is smaller. When the electrochemical working solution reaches the region D1 from D2, the cross section area of the flow channel is reduced, and the flow speed is increased; when the flow channel is transited from D1 to D3, the flow channel is widened, the flow speed is further released, the turbulence effect is enhanced, and products and heat in the process are quickly carried away. The electrochemical operating fluid flow rate in the region of the electrode lead head increases from 5m/s to 15m/s, as indicated by the blue and green arrows in the cross-sectional view 2-2 of fig. 2.
The total length L3 of the electrode conductor head and the total length L0 of the electrode conductor head and the electrode conductor post after assembly are not particularly limited, and for example, the inner hole of a workpiece with a diameter of 3mm and a length of 38mm can be respectively set to be 2.5-4.5 mm and 85-95 mm. The total length ratio (L3/L0) of the electrode conductor head is preferably 0.02 to 0.06, more preferably about 0.04.
The rear lengths L1 and L2 of the electrode lead are not particularly limited, and may be, for example, 2 to 3mm and 1.5 to 2.5mm for an inner hole of a workpiece having a diameter of 3mm and a length of 38 mm. The rear length ratio (L1/L3) of the electrode conductor head is preferably 0.7 to 0.9, more preferably about 0.8. The rear opening length ratio (L2/L3) of the electrode conductor head is preferably 0.6 to 0.8, more preferably about 0.7.
The electrode conductor pillar 20 is a cylindrical member, and the material thereof is not particularly limited, but a metal material having good conductivity is preferable, and examples thereof include copper, aluminum, tungsten, and the like.
The diameter D4 and the length (L0-L2-L3) of the electrode conductor post 20 are not particularly limited, and for example, the inner hole of a workpiece having a diameter of 3mm and a length of 38mm may be 1 to 2mm and 85 to 95mm, respectively. The diameter ratio (D4/D1) of the electrode conductor pillar is preferably 0.3 to 0.7, more preferably about 0.5. The total length ratio ((L0-L2-L3)/L0) of the electrode conductor columns is preferably 0.94 to 0.98, more preferably about 0.96.
As shown in fig. 1, the rear portion of the electrode conductor post is connected to the electrode wire interface 2 by a fastening bolt and a fixing block, and then the electrode wire interface 2 is connected to the negative electrode of the machining power source through a power supply wire.
As shown in fig. 4, the rapid flow structure tool electrode further includes a generally cylindrical electrode insulator. The material of the electrode insulator is not particularly limited, but is preferably an engineering material having excellent insulation, heat resistance and corrosion resistance, for example, polyetheretherketone. The polyether-ether-ketone can still keep good electrical insulation performance under severe working conditions of high temperature, high pressure, high humidity and the like, and the volume resistivity of the polyether-ether-ketone can reach 15-16 th-order omega cm of 10.
The electrode insulator is divided into a front part, a middle part and a rear part. The total length L4 of the electrode insulator is not particularly limited, and may be, for example, 60 to 70mm for a workpiece inner hole having a diameter of 3mm and a length of 38 mm. The total length ratio (L4/L0) of the electrode insulator is preferably 0.6 to 0.8, more preferably about 0.7.
The end face of the electrode insulator at the front diameter D5 is in intimate contact with the end face of the electrode conductor at the rear diameter D3. The diameter D5 is not particularly limited, and may be, for example, 1 to 2mm with respect to a workpiece inner hole having a diameter of 3 mm. The front diameter ratio (D5/D1) of the electrode insulator is preferably 0.5 to 0.9, more preferably about 0.7.
The hole in which the electrode insulator front diameter D6 is located is mounted with a clearance fit with the post in which the electrode conductor post diameter D4 is located. The diameter D6 is not particularly limited, and may be, for example, 1 to 2mm with respect to a workpiece inner hole having a diameter of 3 mm. The front diameter ratio (D6/D7) of the electrode insulator is preferably 0.51 to 0.59, and more preferably about 0.55.
The electrode insulator front angle a1 is the transition bevel angle between diameter D5 and diameter D7, and is not particularly limited in value, and may be, for example, about 5 ° for a 3mm diameter workpiece inner bore.
The electrode insulator forward length L5 is in the region of the transition from the electrode conductor head working location to the electrode insulator prismatic flow guide surface 30 and is not particularly limited in value. For example, the inner hole of a workpiece with a diameter of 3mm and a length of 38mm can be set to 4-7 mm. The electrode insulator preferably has a front length ratio (L5/L3) of 1.5 to 2.0, more preferably about 1.7.
The diameter D7 of the middle part of the electrode insulator is not particularly limited, and may be, for example, 1 to 2mm for a workpiece inner hole having a diameter of 3 mm. The electrode insulator preferably has a middle diameter ratio (D7/D1) of 0.85 to 0.95, more preferably about 0.9.
The diameter D10 of the region of the electrode insulator middle length L6 is greater than its front diameter D7 but less than the diameter of the workpiece inner bore. According to the continuity equation of flowing liquid, namely the mass conservation law, the liquid flows in the pipeline, and when the flow is the same, the flow speed is faster when the sectional area is smaller. When the electrochemical working solution reaches the region of L6, the cross-sectional area of the flow channel is reduced, the flow velocity is increased to reach the maximum velocity of 30m/s, and therefore the region of the middle length L6 of the electrode insulator is called as a prism acceleration surface 30.
The length L6 of the prism in the middle of the electrode insulator is not particularly limited, and for example, the diameter of the inner hole of a workpiece with a diameter of 3mm and a length of 38mm can be made 18-22 mm. The electrode insulator preferably has a ratio of prism length in the middle (L6/L0) of 0.1 to 0.3, more preferably about 0.2.
The height L7 of the prism acceleration surface in the middle of the electrode insulator is not particularly limited, and may be set to 0.8 to 1.2mm for an inner hole of a workpiece having a diameter of 3mm and a length of 38mm, for example. The height ratio (L7/D7) of the prism acceleration surface in the middle of the electrode insulator is preferably 0.4 to 0.6, and more preferably about 0.5.
The diameter D10 of the prism in the middle of the electrode insulator is not particularly limited, and may be, for example, 2.5 to 2.9mm for an inner hole of a workpiece having a diameter of 3mm and a length of 38 mm. The prism diameter ratio (D10/D7) of the middle part of the electrode insulator is preferably 1.41-1.45, and more preferably about 1.43.
The bevels A2 and A3 of the central prism of the electrode insulator are not particularly limited, and may be made 30 for example, for a workpiece having a diameter of 3mm and a length of 38 mm.
The bevel angle a4 at the rear of the electrode insulator is the angle between the frustoconical guide surface 40 and the cylindrical sealing surface 50, and the value of a4 is not particularly limited, and may be, for example, 30 ° for a workpiece bore of 3mm diameter and 38mm length.
As shown in fig. 5 and 1, the electrode insulator cylindrical sealing surface 50 of fig. 5 is secured within the seal housing 5 of fig. 1. The length L8 of the cylindrical seal surface 50 is not particularly limited, and may be, for example, 11 to 15mm for a workpiece inner hole having a diameter of 3mm and a length of 38 mm. The rear cylindrical sealing surface length ratio (L8/L0) of the electrode insulator is preferably 0.12 to 0.16, more preferably about 0.14.
The length of the rear opening of the electrode insulator L9 is not particularly limited, and may be set to 15mm for a workpiece inner hole having a diameter of 3mm and a length of 38mm, for example.
The diameter D8 of the rear opening of the electrode insulator is not particularly limited, and may be set to 1.5mm for a workpiece inner hole having a diameter of 3mm and a length of 38mm, for example.
The diameter D9 of the cylindrical sealing surface at the rear part of the electrode insulator is not particularly limited, and may be, for example, 5.5 to 6.5mm for a workpiece inner hole having a diameter of 3mm and a length of 38 mm. The rear cylindrical sealing surface diameter ratio (D9/D7) of the electrode insulator is preferably 2.5 to 3.5, more preferably about 3.0.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A rapid flow through tool electrode comprising three components: an electrode conductor head, an electrode conductor post and an electrode insulator. The method is characterized in that: the electrode conductor head and the electrode conductor column are combined together in a shrink assembly mode, and the electrode insulator is installed on the outer surface of the electrode conductor column in a small-gap fit mode.
2. The rapidly diverting tool electrode according to claim 1, wherein: the electrode conductor head is a back-to-back combined frustum structure part which is cylindrical and shrinks back and forth and protrudes in the middle.
The diameter of the middle projection of the electrode conductor head is set to D1,
The diameter of the front end face of the electrode lead was D2,
The diameter of the rear end face of the electrode conductor head is set to D3,
The length from the center protruding part to the rear end face of the electrode conductor head is set to L1,
The length of the forward hole formed at the rear end of the electrode conductor head is set to be L2,
When the total length of the electrode conductor tip is set to L3,
the front diameter ratio (D2/D1) of the electrode conductor head is 0.3-0.7,
the rear diameter ratio (D3/D1) of the electrode conductor head is 0.5-0.9,
the rear length ratio (L1/L3) of the electrode conductor head is 0.7-0.9,
the rear opening length ratio (L2/L3) of the electrode conductor head is 0.6-0.8.
3. The rapidly diverting tool electrode according to claim 1, wherein: the electrode conductor post is a cylindrical member.
When the diameter of the electrode conductor pillar is set to D4,
When the total length of the electrode conductor post and the electrode conductor head after assembly is set to L0,
the total length ratio (L3/L0) of the electrode conductor head is 0.02-0.06,
the total length ratio ((L0-L2-L3)/L0) of the electrode conductor columns is 0.94-0.98,
the electrode conductor pillar has a diameter ratio (D4/D1) of 0.3 to 0.7.
4. The rapidly diverting tool electrode according to claim 1, wherein: the electrode insulator is a cylindrical member.
When the total length of the electrode insulator is set to L4,
The front length of the electrode insulator was set to L5,
The length of the prism in the middle of the electrode insulator was set to L6,
The height of the prism acceleration surface in the middle of the electrode insulator is set to L7,
The length of the rear cylindrical sealing surface 50 of the electrode insulator was set to L8,
The diameter of the front end face of the electrode insulator is set to D5,
The diameter of the front inner hole of the electrode insulator is set to D6,
The diameter of the middle part of the electrode insulator is set to be D7,
The diameter of the prism in the middle of the electrode insulator was set to D10,
With the diameter of the rear cylindrical sealing surface of the electrode insulator set at D9,
the total length ratio (L4/L0) of the electrode insulator is 0.6-0.8,
the electrode insulator has a front length ratio (L5/L3) of 1.5 to 2.0,
the electrode insulator has a central prism length ratio (L6/L0) of 0.1 to 0.3,
the height ratio (L7/D7) of the prism acceleration surface at the middle part of the electrode insulator is 0.4-0.6,
the length ratio (L8/L0) of the rear cylindrical sealing surface of the electrode insulator is 0.12-0.16,
the electrode insulator has a front end face diameter ratio (D5/D1) of 0.5 to 0.9,
the front inner bore diameter ratio (D6/D7) of the electrode insulator is 0.51-0.59,
the electrode insulator has a middle diameter ratio (D7/D1) of 0.85 to 0.95,
the prism diameter ratio (D10/D7) of the middle part of the electrode insulator is 1.41-1.45,
the diameter ratio (D9/D7) of the rear cylindrical sealing surface of the electrode insulator is 2.5-3.5.
5. The rapidly diverting tool electrode according to claim 1, wherein: and (4) performing electrochemical deburring and fillet machining by adopting a counter-flow field.
6. A rapid flow guide tool electrode according to claim 1 or 2, wherein: the electrode conductor head is made of brass.
7. A rapid flow through tool electrode according to claim 1 or 3, wherein: the material of the electrode conductor column is 304 stainless steel.
8. A rapid flow guiding tool electrode according to claim 1 or 4, wherein: the electrode insulator is made of polyether-ether-ketone and is provided with a prismatic diversion acceleration structure.
9. A method for electrochemically removing burrs from an internal cross hole and rounding the internal cross hole is characterized in that: the rapid flow guiding tool electrode as claimed in any one of claims 1 to 8 is used for electrochemically removing burrs of a crossed inner hole and rounding the crossed inner hole of a workpiece with a crossed inner hole structure, such as a fuel injection pump body; the electrochemical working fluid adopts a counter-flow field arrangement, the tool electrode adopts a fixed arrangement, and the tool electrode is moved to a position corresponding to a processing area after the relative position of the tool electrode and a workpiece is determined; the electrochemical working fluid flows into a processing area from the crossed hole without the tool electrode, and flows out of the workpiece from a gap between the crossed hole with the tool electrode and the tool electrode; under the action of processing voltage, burrs are removed and fillet processing is carried out through electrochemical reaction, and a processed product and heat are timely taken away from a processing area by the electrochemical working solution flowing at a high speed.
10. The method of claim 9, wherein the electrochemical deburring and filleting of the intersection bore is performed by: the electrochemical working solution comprises 20% NaNO3An aqueous solution having a density of 1250kg/m3The temperature was 28 ℃. The inlet flow rate of the working fluid was 5m/s, and the outlet back pressure was 101,325 Pa. Processing by using a direct current pulse power supply, wherein the voltage is 70V; the minimum value of the unilateral clearance between the tool electrode and the workpiece is 0.07 mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115770914A (en) * | 2022-11-23 | 2023-03-10 | 重庆红江机械有限责任公司 | Electrolytic chamfering clamp for oil sprayer body |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115770914A (en) * | 2022-11-23 | 2023-03-10 | 重庆红江机械有限责任公司 | Electrolytic chamfering clamp for oil sprayer body |
| CN115770914B (en) * | 2022-11-23 | 2024-07-23 | 重庆红江机械有限责任公司 | Electrolytic rounding clamp for oil sprayer body |
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