TWI450783B - Lateral discharge processing device - Google Patents

Description

Lateral discharge machining device

The present invention relates to a lateral discharge machining apparatus, and more particularly to a lateral discharge electrode mechanism suitable for an electric discharge machining machine and an auxiliary mechanism thereof.

EDM is a processing method that uses electrical energy to convert into thermal energy to rapidly melt the workpiece. In detail, during electrical discharge machining, a transitional arc discharge occurs in the gap between the electrode and the working pole in the liquid, thereby generating a heat effect on the workpiece, and at the same time, the liquid in the process is subjected to a gasification explosion due to discharge pressure and heat. At this time, the melted portion of the workpiece is melted into the working fluid accompanying the liquid vaporization phenomenon.

With the diversification of products, shapes such as side holes or grooves are often made in high-strength metal molds. In terms of the current processing method, the machining is mostly performed by turning and milling, but it is easy to cause machining errors due to the vibration of the milling cutter during the machining process. Moreover, tool wear is also a serious problem in the face of high hardness processing of the mold. However, EDM can overcome the shortcomings of turning and milling.

However, most of the current EDM equipment are processed vertically (axially), such as machining holes or grooves. However, in addition to the general apex academic research, there is no related device that can perform the discharge machining on the hole or the inner side of the groove, that is, the lateral (radial) electric discharge machining. It can be seen that how to achieve an electric discharge machining device capable of processing a hole or an inner side of a groove is an urgent need in the industry.

A lateral discharge machining apparatus includes a fixed seat, at least one gear, at least one slide, at least one discharge electrode, and a lift electrode rod. Wherein, the fixing seat defines a radial sliding slot, the gear is pivotally disposed in the radial sliding slot of the fixing seat, the sliding seat is also accommodated in the radial sliding slot, and each sliding seat cloth is provided with a radial rack. Engaged in the gear. At least one discharge electrode is fixed on the at least one sliding seat. As for the lifting electrode rod, perpendicular to the fixing seat, an axial rack is disposed facing one end of the fixing seat, and the lifting electrode rod is inserted into the fixing seat, and the axial rack is engaged with the gear. Wherein, when the other end of the lifting electrode rod is controlled to move up and down, the axial rack driving gear rotates, and the gear drives the radial rack and drives the sliding seat to form a radial slip. Accordingly, the present invention can perform lateral processing on the inside of the hole or the groove, and can provide stable discharge, and the material removal rate is not inferior to the conventional forward (axial) discharge machining, and the electrode consumption ratio is also Unlike conventional forward (axial) discharges.

Preferably, the present invention further includes an axial fixing mechanism and a shaft rod; the shaft fixing mechanism is fixed in a pipe to be processed, and one end of the shaft rod is fixed to the fixing seat, and the other end is The shaft center fixing mechanism is inserted under the fixing seat, and the shaft rod is held at the center of the pipe to be processed via the operation of the shaft fixing mechanism. In other words, the axial center fixing mechanism of the present invention can assist the lateral discharge machining electrode to maintain the same clearance with the pipe to be processed regardless of the electric discharge machining or the lateral (radial) feeding without eccentricity. phenomenon.

Please refer to FIG. 1. FIG. 1 is a cross-sectional view showing a preferred embodiment of the lateral discharge machining apparatus of the present invention. As shown in the figure, the present invention mainly includes a lateral electrode mechanism 1 and a shaft center fixing mechanism 7. Wherein, the lateral electrode mechanism 1 is mainly used for lateral (radial) electric discharge machining, and the axial center fixing mechanism 7 is mainly used for fixing the lateral electrode mechanism 1 so that it is carried out regardless of the electric discharge machining or the electrode (radial) When given, it can maintain the same clearance with the pipe to be processed without eccentricity.

2 and FIG. 3, FIG. 2 is an exploded view of a lateral electrode mechanism according to a preferred embodiment of the present invention, and FIG. 3 is a cross-sectional view of the lateral electrode mechanism of a preferred embodiment of the present invention. As shown in the figure, the lateral electrode mechanism 1 of the present embodiment mainly includes: a lifting electrode rod 2, a fixing base 3, two gears 4, two sliding seats 5, and two discharge electrodes 6. The fixing base 3 includes a cover plate 32 and a radial sliding slot 31 is defined. In the embodiment, the radial sliding slot 31 is a slot, and the cover plate 32 is disposed on the radial sliding slot 31, and the cover 32 defines a central through hole 320 for the lifting electrode rod 2 to be inserted. use.

In addition, the two gears 4 are disposed in the radial sliding slot 31, and the two sliding seats 5 are disposed on two corresponding sides in the radial sliding slot 31. Each sliding bracket 5 is provided with a radial rack 53. Engaged in its corresponding gear 4. In the present embodiment, the slider 5 is a dome-shaped slider including two side walls 51 and a bottom wall 52, and the radial rack 53 is disposed on the inner side of one of the side walls 51. As for the discharge electrode 6, it is connected to the outer surface 520 of the bottom wall 52.

In addition, an axial rack 211 is disposed on two opposite sides of one end 21 of the lifting electrode rod 2, and one end 21 of the lifting electrode rod 2 is inserted into the fixing base 3, and the two gears 4 are respectively located at one end 21 of the lifting electrode rod 2. Corresponding sides, and respectively engage their corresponding axial racks 21. The other end 22 of the lift electrode rod 2 is connected to an electrode of an electrical discharge machining apparatus, typically a negative electrode. However, the operation mode of the lateral electrode mechanism 1 of the present embodiment is as follows. When the elevation electrode rod 2 is lifted and lowered, the axial rack 211 drives the gear 4 to rotate, and the gear 4 drives the radial rack 53 again. The carriage 5 forms a radial slip, that is to say the discharge electrode 6 is then fed laterally (radially).

Please refer to FIG. 1 , FIG. 4 , and FIG. 5 simultaneously. FIG. 4 is an exploded view of a shaft center fixing mechanism according to a preferred embodiment of the present invention, and FIG. 5 is a cross-sectional view of the shaft center fixing mechanism according to a preferred embodiment of the present invention. . The shaft fixing mechanism 7 shown in Fig. 1 is fixed in a pipe member 8 to be processed, but the invention is not limited to pipe fittings, other machining parts holes, grooves, or other processing areas requiring side machining. Can be applied. As shown in FIG. 1, the fixing base 3 of the embodiment includes a shaft rod 33 which is inserted into the shaft fixing mechanism 7 so that the shaft rod 33 is held at the center of the pipe member 8 to be processed, even if The lateral electrode mechanism 1 can maintain a center or a predetermined position so that it does not cause eccentricity or error.

In detail, the pivot fixing mechanism 7 of the embodiment mainly includes a slot seat 71, two lifting blocks 72, two inclined sliders 73, two bolts 74, two first gears 77, a second gear 78, and a center. Bushing 79. The shaft rods 33 are inserted into the central shaft hole 75, and each of the lifting blocks 72 defines a screw hole 720. Each of the sloped sliders 73 defines a long slot 730. In addition, the slot 71 is axially opened with two lifting slots 710, which are located on two corresponding sides, and each lifting slot 710 includes an axial inclined surface 711. In addition, the two lifting blocks 72 are respectively accommodated in the long groove 730, and the two inclined surface sliders 73 are respectively accommodated in the two lifting grooves 710.

Moreover, as shown in the figure, the central sleeve 79 is pivotally connected to the center of the upper surface of the slot plate 76, and the inner hole of the central sleeve 79 forms a central shaft hole 75 for inserting the shaft rod 33 of the fixed base 3. Set aside for use. Moreover, the housing 71 further includes a slot plate 710 which is an axially long slot extending through one end surface 700 of the housing 71. The groove plate 76 is covered on the end surface 700 of the housing 71. Moreover, the two first gears 77 and the second gears 78 are pivotally disposed on the slot plate 76, and the two first gears 77 are respectively fixed to the two bolts 74, and the second gears 78 are disposed on the second gears. The gears 77 mesh with the two first gears 77. Moreover, the two bolts 74 pass through the slot plate 76 and are screwed to the two lifting blocks 72, respectively.

However, the operation of the shaft center fixing mechanism 7 of the present embodiment is as follows. When one of the bolts 74 is rotated, the other bolts 74 are synchronously rotated by the transmission of the first gear 77 and the second gear 78. When the bolt 74 rotates, the two side lifting blocks 72 rotate and elevate accordingly, and the lifting block 72 drives the inclined surface slider 73 to axially rise and fall along the axial inclined surface 711 in the lifting groove 710 and radially protrude or retract to abut against the processing. The inner side wall 81 of the tube member 8 is inserted into the central shaft hole 75 by the shaft rod 33 to maintain the lateral electrode mechanism 1 at a central position or a predetermined position.

The above-mentioned embodiments are merely examples for convenience of description, and the scope of the claims is intended to be limited to the above embodiments.

1‧‧‧ lateral electrode mechanism

2‧‧‧ Lifting electrode rod

21, 22‧‧‧

211‧‧‧Axial rack

3‧‧‧ Fixed seat

31‧‧‧ Radial chute

32‧‧‧ Cover

320‧‧‧Central through hole

33‧‧‧Axis rod

4‧‧‧ Gears

5‧‧‧Slide

51‧‧‧ side wall

52‧‧‧ bottom wall

520‧‧‧ outer surface

53‧‧‧ Radial rack

6‧‧‧Discharge electrode

7‧‧‧Axis fixing mechanism

700‧‧‧ end face

71. . . Slot

710. . . Lifting slot

711. . . Axial bevel

72. . . Lifting block

720. . . Screw hole

73. . . Bevel slider

730. . . Long slot

74. . . bolt

75. . . Central shaft hole

76. . . Slot plate

77. . . First gear

78. . . Second gear

79. . . Central bushing

8. . . Pipe fittings to be processed

81. . . Inner side wall

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional view of a preferred embodiment of the present invention.

2 is an exploded view of a lateral electrode mechanism in accordance with a preferred embodiment of the present invention.

Figure 3 is a cross-sectional view of a lateral electrode mechanism in accordance with a preferred embodiment of the present invention.

4 is an exploded view of a shaft center securing mechanism in accordance with a preferred embodiment of the present invention.

Figure 5 is a cross-sectional view of a shaft center securing mechanism in accordance with a preferred embodiment of the present invention.

1. . . Lateral electrode mechanism

2. . . Lifting electrode rod

33. . . Shaft rod

4. . . gear

5. . . Slide

6. . . Discharge electrode

7. . . Axis fixing mechanism

8. . . Pipe fittings to be processed

81. . . Inner side wall

Claims (8)

A lateral discharge machining device, comprising: a fixing base, a radial sliding slot is defined as a slot; at least one gear is pivotally disposed in at least one side of the radial sliding slot of the fixing seat; At least one sliding seat is disposed in the radial sliding slot, each sliding seat cloth is provided with a radial rack that is engaged with the at least one gear; at least one discharge electrode is fixed to the at least one sliding seat And a lifting electrode rod perpendicular to the fixing seat and disposed at one end facing the fixing seat with at least one axial rack, one end of the lifting electrode rod is inserted into the fixing seat, the at least one axial direction The rack system engages the at least one gear; wherein the at least one axial rack drives the at least one gear to rotate when the other end of the lifter rod is controlled to move, and the at least one gear drives the radial rack And driving the sliding seat to form a radial slip; wherein the at least one sliding seat is a circular sliding seat, comprising two side walls and a bottom wall, the radial rack is disposed on the inner side of one of the side walls The discharge electrode is connected to an outer surface of the bottom wall. The lateral electric discharge machining device of claim 1, comprising two gears and two sliding seats respectively disposed on two sides of the sliding slot, and two corresponding sides of one end of the lifting electrode rod respectively The cloth is provided with an axial rack, and the two gears are pivotally disposed in the radial sliding slot and respectively located on two corresponding sides of one end of the lifting electrode rod, and the two gears respectively engage the lifting electrode rod Axial racks, the two slides The pedestal is received on two corresponding sides of the radial chute and meshes with the two gears. The lateral discharge machining device of claim 1, wherein the fixing base comprises a cover plate, the cover plate is disposed on the radial sliding slot, and the cover plate defines a central through hole, the lifting One end of the electrode rod is inserted through the central through hole and inserted into the fixing seat. The lateral electrical discharge machining device of claim 1, further comprising a shaft center fixing mechanism fixed in a pipe to be processed; and a shaft rod, one end of which is fixed to the fixing seat, and the other One end is inserted into the shaft fixing mechanism below the fixing seat, and the shaft rod is held at a center position of the pipe to be processed via the operation of the shaft fixing mechanism. The lateral discharge machining device of claim 4, wherein the shaft center fixing mechanism comprises a slot seat, two lifting blocks, two inclined sliders, two bolts, and a central shaft hole, The shaft rod is inserted into the central shaft hole; each lifting block defines a screw hole; each inclined surface slider defines a long slot; the slot seat is axially opened with two lifting slots, which are located on two corresponding sides, Each of the lifting grooves includes an axial inclined surface, and the two lifting blocks are respectively accommodated in the long grooves of the two inclined surface sliders, and the two inclined surface sliding blocks are respectively accommodated in the two lifting grooves, the two The bolts respectively pass through the slot and are screwed to the two lifting blocks; wherein, when the two bolts are rotated, the two lifting blocks are lifted and lowered with the screw lock, and the two inclined sliders are driven on the two The lifting grooves are axially raised and lowered along the axial inclined surface and radially protruded or contracted to abut against the inner side wall of the pipe to be processed. The lateral electrical discharge machining device of claim 5, wherein the socket further comprises a slot plate, wherein the two lifting slots are axially long slots extending through at least one end surface of the slot, the slot The plate cover is disposed on the at least one end surface of the slot, and the two bolts respectively pass through the slot plate and are screwed to the two lifting blocks. The lateral electrical discharge machining device of claim 6, wherein the axial fixing mechanism further comprises two first gears and a second gear, and the gears are pivotally disposed on the slot plate. The two first gear trains are respectively fixed to the two bolts, and the second gear train is disposed between the two first gears and meshes with the two first gears. The lateral electrical discharge machining device of claim 6, wherein the axial fixing mechanism further comprises a central bushing pivotally connected to a central position of the upper surface of the slot plate, the central bushing The inner bore forms the central shaft bore.