CN213288960U - Electromachining slotting system - Google Patents

Abstract

The utility model provides an electromachining slotting system, a be used for fluting to the shaping part, wherein, the shaping electrode includes discoid electrode body, electrode body has the dish center portion and around the dish edge portion of dish center portion, the dish edge portion reduces gradually towards outward flange thickness from the dish center portion, first drive unit drive electrode body intermittent type nature rotates, make the different parts of edge portion along circumference distribution switch to facing the shaping part one by one, and constitute working electrode and discharge to the shaping part one by one, second drive unit provides drive power under working electrode keeps facing the state of shaping part, make electrode body and shaping part remove along the first direction for each other, in order to process out the recess that extends along the first direction on the shaping part, wherein, the first direction is perpendicular with electrode body's axis of rotation. The electromachining grooving system can improve electromachining grooving efficiency and is particularly suitable for processing special-shaped grooves on high-hardness plunger parts.

Description

Electromachining slotting system

Technical Field

The utility model relates to an electricity processing fluting system, specially adapted sets up the profiled groove on the plunger part.

Background

In the fuel nozzle valve of the gas turbine, in order to meet the requirement of flow debugging, a special-shaped groove is designed on a valve plunger, and the valve plunger and a valve cylinder can move relatively in the working process of the valve, so that the requirements on the wear resistance and hardness of materials are high, and the special-shaped groove is generally machined by electric sparks. In order to improve the machining accuracy of the parts, the machining is generally performed in two steps, namely, firstly, rough machining of the electrode is performed, and then, finish machining of the electrode is performed. Because the electrode is worn in the machining process, in order to meet the machining precision requirement of +/-0.01 mm, a new electrode is generally used for primary finish machining firstly and then scrapped after being used for primary rough machining in the actual machining process, the utilization rate of the electrode is low, and the electrode is frequently replaced.

Meanwhile, the conventional formed electrode is generally designed into an irregular structure according to a special-shaped groove structure, so that the formed electrode is generally milled, and has high cost and poor precision.

Therefore, it is desirable to provide an electromachining grooving system for grooving a formed part, which can improve the electromachining grooving efficiency and further reduce the manufacturing cost of the formed electrode.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an electricity processing fluting system can improve electricity processing fluting efficiency, and specially adapted is to high rigidity plunger parts machining abnormal shape groove.

The utility model provides an electromachining slotting system, which is used for slotting a formed part, wherein a formed electrode comprises a disc-shaped electrode body, the electrode body is provided with a disc center part and a disc edge part surrounding the disc center part, and the thickness of the disc edge part is gradually reduced from the disc center part to the outer edge; the first driving unit drives the electrode body to intermittently rotate, so that different parts of the rim part distributed along the circumferential direction are switched to face the formed part one by one, and form working electrodes one by one to discharge the formed part; the second driving unit provides a driving force in a state where the working electrode is kept facing the formed part, so that the electrode body and the formed part move relative to each other in a first direction to machine a groove extending in the first direction on the formed part, wherein the first direction is perpendicular to a rotation axis of the electrode body.

In one embodiment, the electrode body is in the form of a solid of revolution.

In one embodiment, the second driving unit drives the electrode body to move in a first direction.

In one embodiment, the first drive unit drives the molded part to move in a first direction.

In one embodiment, the outer edge of the rim portion is in the form of an outer radius.

In one embodiment, the first driving unit is configured to drive the electrode body to rotate forward and backward.

In one embodiment, the profiled element is a plunger element and the recess is a profiled groove.

In one embodiment, the electromachining grooving system further comprises a third drive unit that drives the profiled part to intermittently rotate such that different portions of the profiled part in the direction of rotation face the electrode body one by one.

In one embodiment, the shaped electrode further comprises a strut adapted to be clamped within an electrode cartridge, the strut connecting the hub portion of the electrode body and extending along the axis of rotation of the electrode body.

In one embodiment, the struts of the shaped electrode are integrally formed with the electrode body.

Therefore, the utility model provides an electricity processing fluting system passes through between the shaping electrode intermittent type nature and rotates, make the shaping electrode constitute working electrode one by one and discharge to the shaping part along the different parts of circumference distribution, thereby can use single shaping electrode to realize fluting many times, the specially adapted a plurality of parts need the grooved condition or this kind of batch condition of a plurality of recesses need be seted up to same part, can avoid the problem that electrode utilization rate is low and the clamping frequently causes fluting inefficiency in the current electricity processing fluting scheme, avoid the problem that the cost is higher and the precision is relatively poor simultaneously, the specially adapted is to high rigidity plunger parts machining deformed groove.

In the electromachining slotting system, the electrode body is in a revolving body form, lathe machining can be adopted, and compared with a milling machining mode adopted by the existing formed electrode, the electromachining slotting system is higher in machining precision and high in machining speed, and the manufacturing cost of the formed electrode can be reduced. In addition, the manufacturing precision of the molded electrode is improved, and the groove processing precision of the molded part can be further improved.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:

fig. 1 is a schematic diagram showing an example structure of a molded part.

Fig. 2 is a schematic diagram illustrating an example configuration of an electromachining grooving system according to the present invention.

Fig. 3 is a schematic diagram illustrating a shaped electrode according to the present invention.

Fig. 4 is a schematic view showing a conventional molded electrode.

Fig. 5 is a schematic diagram illustrating a prior art electro-machining grooving system.

Detailed Description

The present invention will be further described with reference to the following detailed description and the accompanying drawings, wherein the following description sets forth more details for the purpose of providing a thorough understanding of the present invention, but it is obvious that the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar generalizations and deductions based on the practical application without departing from the spirit of the present invention, and therefore, the scope of the present invention should not be limited by the contents of the detailed description.

For example, a first feature described later in the specification may be formed over or on a second feature, and may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact. Further, when a first element is described as being coupled or coupled to a second element, the description includes embodiments in which the first and second elements are directly coupled or coupled to each other, as well as embodiments in which one or more additional intervening elements are added to indirectly couple or couple the first and second elements to each other.

Fig. 1 shows a plunger part with a profiled groove as an example of a molded part 20 with a groove 201. Fig. 2 shows an example configuration of an electromachining grooving system 10 according to the present invention, and fig. 3 shows an example configuration of a profiled electrode 1 in the electromachining grooving system 10. While figures 4 to 5 show the construction of a prior art electro-machining grooving system 10a and a profiled electrode 1a, respectively. It is to be understood that the drawings are designed solely for purposes of illustration and not as an aid to scale, and that no limitation to the scope of the invention is intended. The plunger piece is illustrated as the molded piece 20 and the groove 201 is illustrated as a profiled groove, however, it is understood that the electro-machining grooving system 10 can be used to groove other molded pieces and can open other grooves of a common configuration. The grooves of the conventional type may have a rectangular or trapezoidal cross section, and the grooves other than the conventional type may be called as profile grooves.

First, referring to fig. 1, 4 and 5, a plunger component shown in fig. 1, that is, a molded component 20 may be fixed to a table of an electric discharge machine by a jig, and a conventional molded electrode 1a shown in fig. 4 may be clamped in an electrode chuck to align the components, as shown in fig. 5. Then, the proper parameters of voltage, current, pulse width and interval are selected for processing. During the machining process, the conventional forming electrode 1a can move up and down the discharge relative to the plunger part 20 along the central axis X2 of the plunger part 20 by a driving unit 22a such as a rotary motor and a transmission mechanism. As mentioned in the background art, since the machining accuracy of the profile groove as an example of the groove 201 is required to be high, in consideration of the electrode wear, generally, the electric discharge rough machining is performed first, and then the new formed electrode 1a is replaced, and the electric discharge finish machining is performed, and the formed electrode 1a after the finish machining can be used again for one rough machining and then discarded.

Therefore, when the conventional formed electrode 1a shown in fig. 4 is used for machining, one formed electrode can be used for only one rough machining and finish machining, and the one formed electrode 1a needs to be replaced in each machining process of the profile groove, which is inefficient.

An example configuration of an electro-machining grooving system 10 according to the present invention is described below in conjunction with fig. 1, 2 and 3.

The electro-machining grooving system 10 can groove the formed part 20, in other words, can machine the groove 201 on the formed part 20. The electromachining grooving system 10 includes a profiled electrode 1, a first drive unit 21, and a second drive unit 22.

The shaped electrode 1 comprises a disc-shaped electrode body 3. The electrode body 3 has a hub portion 31 and a rim portion 32 surrounding the hub portion 31. The rim portion 32 is gradually reduced in thickness from the hub portion 31 toward the outer edge 321.

The first drive unit 21 drives the electrode body 3 to intermittently rotate so that different portions of the rim portion 32 distributed in the circumferential direction C0 are switched to face the formed part 20 one by one, and constitute working electrodes one by one to discharge the formed part 20. It will be understood that "intermittent rotation" means rotation and dwell, periodically, for a period of time or angle, for a period of dwell, and then continuing for a period of time or angle, for a further period of dwell.

For example, the first driving unit 21 may be a rotating electrical machine, and an output shaft of the rotating electrical machine is connected to the shaped electrode 1, and can drive the electrode body 3 to rotate. As an example, three rays R1, R2, R3 radiating outward from the center of the electrode body 3 (i.e., the rotation axis X0 of the electrode body 3) are shown in fig. 2, the ray R2 is interposed between the ray R1 and the ray R3, a first portion 3201 of the rim 31, in which the rays R1 and R2 are distributed along the circumferential direction C0, and a second portion 3202 of the rim 31, in which the rays R2 and R3 are distributed. The ray R1 and the ray R3 may extend in opposite directions, that is, 180 ° may be formed between the ray R1 and the ray R3, and the ray R2 may be located at the midpoint between the ray R1 and the ray R3, that is, 90 ° may be formed between the ray R1, the ray R2, and the ray R3, in other words, the rim portion 32 may be equally divided into four portions in the circumferential direction C0, and each portion may face the formed part 20 one by one to constitute the working electrode. In other words, the first driving unit 21 stops after driving the electrode body 3 to rotate 90 ° each time, so that a part of the rim portion 32 distributed along the circumferential direction C0 constitutes a working electrode, discharges electricity to the formed part 20, and after machining a groove, the first driving unit 21 drives the electrode body 3 to rotate 90 ° again, and another part of the rim portion 32 distributed along the circumferential direction C0 constitutes a working electrode, discharges electricity to the formed part 20, and machines another groove.

In fig. 2, illustratively, the first portion 3201 is forming the working electrode to discharge the molded part 20, and at this time, the first driving unit 21 may be in a rest state, and subsequently, the first driving unit 21 may drive the electrode body 3 to rotate until the second portion 3202 faces the molded part 20, and then keep the second portion 3202 facing the molded part 20, that is, the first driving unit 21 may be in a rest state again.

The second driving unit 22 may provide a driving force in a state where the working electrode (e.g., the first portion 3201 or the second portion 3202) is held facing the molded part 20, so that the electrode body 3 and the molded part 20 are moved in the first direction D1 with respect to each other to machine the groove 201 extending in the first direction D1 on the molded part 20. Wherein the first direction D1 is perpendicular to the rotation axis X0 of the electrode body 3.

The second drive unit 22 provides a driving force such that the electrode body 3 and the profiled part 20 move relative to each other in the first direction D1 including the following: the second driving unit 22 drives the electrode body 3 to move in the first direction D1; and/or the second drive unit 22 drives the profiled element 20 to move in the first direction D1. For example, the second driving unit 22 may also be a rotary motor which converts a rotary motion into a linear motion, for example, by a screw transmission mechanism, thereby driving the forming electrode 1 (electrode body 3) or the forming part 20 to move in the first direction D1. Also for example, the second drive unit 22 may comprise two rotary motors, wherein one rotary motor drives the electrode body 3 to move in the first direction D1, e.g. via a screw transmission, and the other rotary motor drives the shaped part 20 to move in the first direction D1, e.g. via a screw transmission, which may also effect that the electrode body 3 and the shaped part 20 move in the first direction D1 relative to each other.

Fig. 2 shows an embodiment in which the second driving unit 22 drives the electrode body 3 to move in the first direction D1. In fig. 2, the rotating motor as the first driving unit 21 may be mounted on a slider, and the slider is configured to slide in a slide rail extending along the first direction D1, and the rotating motor as the second driving unit 22 drives the slider to slide along the first direction D1 through a screw transmission mechanism, so as to drive the forming electrode 1 as the rotating motor of the first driving unit 21 and the output shaft thereof to move along the first direction D1.

In the illustrated embodiment, the electrode body 3 may be in the form of a solid of revolution. In other words, the electrode body 3 is substantially disk-shaped. The axis of rotation X0 of the electrode body 3 is also the central axis of the electrode body 3 in the form of a solid of revolution. As shown in fig. 4, the conventional formed electrode 1a is generally designed to have an irregular structure according to a profiled groove structure, and thus the formed electrode 1a is generally milled, which is costly and has poor precision. The electrode body 3 in the form of a solid of revolution can be processed better, for example, by turning, with low processing cost and high processing precision. In addition, the working electrode of the electrode body 3 in the form of a solid of revolution always maintains little contact with the molded part 20, and there is a limit to the portion of the electrode body 3 damaged. In the illustrated embodiment, the disk center portion 31 of the electrode body 3 may have a cylindrical shape. The rim portion 32 of the electrode body 3 is gradually reduced in thickness from the hub portion 31 toward the outer edge 321, that is, the outer shape of the electrode body 3 is formed substantially by two circular truncated cones butted via large-diameter ends.

In the embodiment of fig. 2, the electro-machining slotting system 10 can also include a third drive unit 23. The third drive unit 23 may drive the profiled element 20 to rotate intermittently such that different portions of the profiled element 20 in the direction of rotation C2 face the electrode body 3 one by one. For example, when the plunger part as an example of the molded part 20 needs to process a plurality of identical profiled grooves, by cooperating with the rotation of the molded part 20, the processing efficiency can be greatly improved. Preferably, the first and second driving units 21 and 22, in which the driving member intermittently rotates, may employ stepping motors.

With reference to fig. 1 and 2, the outer edge 321 of the rim portion 32 of the electrode body 3 may be in the form of an outer radius. In other words, the outer edge 321 takes a rounded form, and the rounded arc is convex in form. This form is particularly suitable for the profiled groove machining of plunger parts.

In a preferred embodiment, the first driving unit 21 may be configured to drive the electrode body 3 to rotate forward and backward. In other words, the first driving unit 21 can switch the rotation direction of the electrode body 3. Illustratively, after the first portion 3201 of the formed electrode 1 is roughly machined once, the formed electrode 1 may be separated from the formed part 20 and rotated by a certain angle such as 90 ° (the rotation at this time is, for example, referred to as forward rotation), another portion (an unconsumed portion, for example, the second portion 3202) distributed along the circumferential direction C0 by the rim portion 32 is finish-machined, after the finish-machining is completed, the formed electrode 1 is further reversely rotated, another groove 201 is roughly machined by the previous first portion 3201, and the above-mentioned processes are repeated, so that the working electrode is constituted by the rim portion 32 of the formed electrode 1 divided into four portions in the circumferential direction C0, and one formed electrode 1 may be roughly machined and finished at least three times. It is to be understood that, in the case where the first driving unit 21 can drive the electrode body 3 to rotate forward and backward, "the first driving unit 21 drives the electrode body 3 to rotate intermittently" means that the rotation further includes forward rotation and backward rotation, and "intermittent rotation" means that switching is periodically performed between the forward rotation, the intermittent rotation, and the backward rotation.

In the illustrated embodiment, the forming member 20 may be a plunger member and the recess 201 may be a profiled recess. According to the utility model discloses an electricity processing fluting system 10 specially adapted processes the profiled groove, especially processes the profiled groove on high rigidity plunger part. The first direction D1 may be parallel to the central axis X2 of the plunger piece.

In the illustrated embodiment, the shaped electrode 1 may further comprise a support rod 4 adapted to be clamped within an electrode cartridge. The strut 4 may be connected to the hub 31 of the electrode body 3 and extend along the axis of rotation X0 of the electrode body 3. Further, the support rod 4 of the molded electrode 1 may be integrally molded with the electrode body 3. Thus, the whole formed electrode 1 is conveniently formed by lathing.

In the illustrated embodiment, the strut 4 may be a circular shaft having a diameter smaller than the disk portion 31 of the electrode body 3 and disposed coaxially with the disk portion. Further, the junction of the strut 4 and the electrode body 3 of the shaped electrode 1 is in the form of an inner radius, as shown in fig. 3. Therefore, the lathe machining and forming can be more convenient.

It is to be understood that the above-described modifications of the different embodiments may be combined as appropriate. The drive units 21, 22, 23 may also be cylinder type hydraulic drive systems.

By adopting the electromachining slotting system, one forming electrode can be used for finishing the machining of the grooves of a plurality of parts or the grooves of one part, the utilization rate of the forming electrode can be obviously improved through the rotation of the forming electrode or even the forming part, the time for frequently replacing the forming electrode is reduced, and the slotting efficiency is improved. In addition, the forming electrode of the electromachining slotting system adopts a revolving body form, has a simple structure, can be formed only by adopting vehicle machining, and has the advantages of high machining speed, high precision and low cost.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention, all without departing from the content of the technical solution of the present invention, fall within the scope of protection defined by the claims of the present invention.

Claims (10)

1. An electromachining grooving system for grooving a formed part, comprising:

a contoured electrode comprising a disk-shaped electrode body having a disk center portion and a disk rim portion surrounding the disk center portion, the disk rim portion tapering in thickness from the disk center portion toward an outer edge;

a first driving unit that drives the electrode body to intermittently rotate so that different portions of the rim portion distributed in the circumferential direction are switched one by one to face the molded part and constitute working electrodes one by one to discharge the molded part; and

and a second driving unit which provides a driving force in a state where the working electrode is kept facing the molded part so that the electrode body and the molded part move relative to each other in a first direction to machine a groove extending in the first direction on the molded part, wherein the first direction is perpendicular to a rotation axis of the electrode body.

2. The electromachined grooving system of claim 1,

the electrode body is in a revolving body form.

3. The electromachined grooving system of claim 1,

the second driving unit drives the electrode body to move along a first direction.

4. The electromachined grooving system of claim 1,

the first driving unit drives the molded part to move along a first direction.

5. The electromachined grooving system of claim 1,

the outer edge of the rim portion is in the form of an outer radius.

6. The electromachined grooving system of claim 1,

the first driving unit is arranged to drive the electrode body to rotate forward and backward.

7. The electromachined grooving system of claim 1,

the molding part is a plunger part, and the groove is a special-shaped groove.

8. The electromachined grooving system of claim 1,

the electromachining slotting system further comprises a third driving unit, wherein the third driving unit drives the forming part to intermittently rotate, so that the forming part faces the electrode body one by one along different parts of the rotating direction.

9. The electromachined grooving system of claim 1,

the forming electrode also comprises a supporting rod which is suitable for being clamped in an electrode clamping head, and the supporting rod is connected with the disk center part of the electrode body and extends along the rotation axis of the electrode body.

10. The electromachined grooving system of claim 9,

the supporting rod of the formed electrode and the electrode body are integrally formed.

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