TWI773326B - Magnetic electrical discharge machining device - Google Patents

Abstract

A magnetic electrical discharge machining device includes a base unit, a rotating unit, a magnetic member, and an electrode tool member. The rotating unit comprises two rotating members that extend up and down and are rotatably disposed on the base unit. The rotating members are separately arranged from each other. The magnetic member is disposed on the base unit. The electrode tool member abuts against the rotating members due to the magnetic force of magnetic member. The electrode tool member can be driven by the rotating members to rotate.

Description

Magnetic discharge machining device

The present invention relates to an electrical discharge machining device, in particular to a magnetic suction electrical discharge machining device.

Nowadays, most of the electrode tools used for processing microscopic holes below 0.1mm are made of solid round bars. They cannot process slender and large electrode tools such as copper tube electrodes, and because electrical discharge machining is mainly generated by the explosive force of discharge The high temperature melting to remove the material, so the effect of the consumption of the micro-electrode tool is more significant, and the electrode tool cannot be processed after consumption, and must be replaced by manpower, so the mass production of micro-hole EDM is quite difficult.

In the current electrical discharge machining device, the electrode tool is locked in the chuck, or the pulley is used as a fixture for fixing the electrode to rotate, and the rotation of the electrode tool is driven by the spindle motor and the belt. However, when the electrode tool is consumed in processing, the belt must be pulled apart and the pulley removed before the electrode tool can be removed and replaced with a new electrode tool. This process is labor-intensive and time-consuming, and the disassembly and assembly process is quite inconvenient, which cannot achieve automated production. , there is still room for improvement.

Therefore, one of the objectives of the present invention is to provide a convenient and quick The magnetic discharge machining device of the pole tool can maintain the high positioning accuracy of the electrode tool, shorten the time spent on disassembly and exchange of the electrode tool, and increase the feasibility of automatic production.

The magnetic discharge machining device of the present invention includes a base unit; a rotating unit including two rotating parts extending up and down and synchronously rotatably arranged on the base unit, the rotating parts are arranged at intervals from each other; a magnetic part , which is arranged on the base unit; and an electrode tool piece, which is attracted by the magnetic piece and extends up and down against the rotating pieces, and the electrode tool piece can be driven by the rotating pieces to rotate.

In some embodiments, each rotating member has a rotating shaft extending up and down and rotatably disposed on the base unit and a first abutting plate fixedly sleeved on the rotating shaft, the first abutting plate of the rotating members The abutting discs are spaced apart from each other for the electrode tool piece to abut.

In some embodiments, the rotating unit further includes two rollers fixedly sleeved on the rotating shafts and spaced apart from the first abutting discs, respectively, and the magnetic discharge machining device further includes a roller disposed on the rotating shafts. The base unit is connected with the driving units of the rollers, and the driving unit is used for driving the rotating parts to rotate.

In some embodiments, the drive unit includes a motor disposed on the base unit, a drive wheel connected to the motor, a first track surrounding and connected to the drive wheel and one of the rollers, and a drive wheel surrounding and connected to the drive A second track of the wheel and the other of the rollers, the first track and the second track being spaced apart from each other.

In some embodiments, the base unit includes a base and a front frame fixed to the base, the base has a front opening, the front frame surrounds the front opening and has two upper grooves and two There are two lower grooves corresponding to the upper and lower positions of the upper grooves, wherein an upper groove and the corresponding lower groove are used for joint supply. One of the rotating shafts is accommodated, and the other upper groove and the corresponding lower groove are jointly used for accommodating the other rotating shaft, and the magnetic member is disposed between the front frame and the lower grooves.

In some embodiments, the upper grooves and the lower grooves are both V-shaped and the included angle is 90 degrees, and the tips of the upper grooves and the lower grooves are facing the motor, so that each rotating shaft The upper and lower extension lines of the shaft center, the corresponding upper and lower extension lines of the upper groove and the lower groove, and the upper and lower extension lines of the shaft center of the motor are all located on the same line in a horizontal section.

In some embodiments, the base unit further includes an upper abutment plate connected to the front frame adjacent to the upper grooves and a lower abutment plate connected to the base adjacent to the lower grooves. The rotating shafts The upper ends of the shafts are movably connected to the upper joint abutment plate, and the lower ends of the rotating shafts are movably connected to the lower joint abutment plate.

In some embodiments, each rotating member further includes a second abutting plate fixedly sleeved on the rotating shaft and spaced apart from the first abutting plate, and the second abutting plates of the rotating members are arranged at intervals from each other for the electrode tool to abut against.

In some embodiments, the base unit further includes an abutment frame disposed on the base, and the abutment frame is for the upper end of the electrode tool to abut against.

In some embodiments, the base unit further includes an insulating sheet disposed between the base and the front frame, and the insulating sheet surrounds the front opening.

The present invention has at least the following effects: the electrode tool is attracted by the rotating parts of the rotating unit in cooperation with the magnetic part, so that the electrode tool can be rotatably abutted against the rotating parts, so as to perform micro-hole machining on the workpiece . When the electrode tool needs to be replaced, it is only necessary to remove the electrode tool against the magnetic attraction force of the magnetic member, and there is no need to rely on any jig during the process, nor does it need to disassemble or By moving other components, the time required for disassembling and exchanging the electrode tool is shortened, work efficiency is increased, and the feasibility of automatic production is improved.

1: Base unit

11: Pedestal

111: Front opening

112: side opening

113: upper opening

12: Connection board

13: Front frame

131: Upper groove

132: Lower groove

14: Insulation sheet

15: Upper joint plate

16: Lower joint abutment plate

17: Abutment frame

18: Mounting plate

181: Perforation

2: Rotating unit

21: Turning parts

211: Spindle

212: First Abutment Plate

213: Second Abutment Plate

22: Roller

3: drive unit

31: Motor

32: Drive Wheel

33: The first track

34: Second track

4: Magnetic parts

5: Electrode tool parts

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: FIG. 1 is a perspective view of an embodiment of the magnetic discharge machining device of the present invention; An exploded perspective view; FIG. 3 is a front view of the embodiment; and FIG. 4 is a side view of the embodiment.

Referring to FIGS. 1 to 3 , an embodiment of the magnetic discharge machining device of the present invention is suitable for forming micro holes on a workpiece (not shown) by EDM on a displacement mechanism (not shown). The magnetic discharge machining device includes a base unit 1 , a rotating unit 2 , a driving unit 3 , a magnetic member 4 and an electrode tool member 5 .

The base unit 1 includes a base 11 , a connecting plate 12 fixed to the base 11 , a front frame 13 fixed to the base 11 by a screw lock, a front frame 13 disposed on the base 11 and the front The insulating sheet 14 between the frames 13, a T-shaped upper abutment plate 15 connected to the front frame 13 by a screw lock, a lower L-shaped abutment plate 16 connected to the base 11 by a screw lock , an abutment frame 17 disposed on the base 11 and a connection Mounting plate 18 above the base 11 . The base 11 has a front opening 111 , two side openings 112 and an upper opening 113 . The connecting plate 12 is connected to the displacement mechanism (not shown in the figure) by means of a screw lock. The front frame 13 surrounds the front opening 111 and has two upper grooves 131 and two lower grooves 132 respectively corresponding to the upper and lower positions of the upper grooves 131 . The insulating sheet 14 and the front frame 13 have the same frame shape and surround the front opening 111 , and the area of the middle opening is slightly smaller than the front opening 111 to provide insulation protection between the base 11 and the front frame 13 . The upper engaging plate 15 is adjacent to the upper grooves 131 , and the lower engaging plate 16 is adjacent to the lower grooves 132 . The mounting plate 18 is screw-locked on the base 11 and covers the upper opening 113 and has a through hole 181 , and the size of the through hole 181 is smaller than the upper opening 113 .

The rotating unit 2 includes two rotating members 21 extending up and down and synchronously rotatably disposed on the base unit 1 , and two rollers 22 respectively fixedly sleeved on the rotating members 21 . The rotating members 21 are arranged at intervals from each other. Each rotating member 21 has a rotating shaft 211 extending up and down and rotatably disposed on the base unit 1 , a first abutting plate 212 fixedly sleeved on the rotating shaft 211 , and A second abutting plate 213 is fixedly sleeved on the rotating shaft 211 and is spaced from the first abutting plate 212 and located below the first abutting plate 212 . One of the upper grooves 131 and the corresponding lower groove 132 of the front frame 13 are used for accommodating one of the shafts 211 , and the other upper groove 131 and the corresponding lower groove 132 are used for the other shaft 211 . accommodate. The upper ends of the shafts 211 are movably connected to the upper abutment plate 15 , and the lower ends of the shafts 211 are movably connected to the lower abutment plate 16 , so that the shafts 211 can be rotatably positioned on the upper abutment plate 15 and the lower abutment plate 16 . The lower joint is between the abutment plates 16 . The first abutting discs 212 and the second abutting discs 213 of the rotating members 21 are spaced apart from each other and have the same size, for the electrode tool member 5 to abut against together. It should be noted that, in other embodiments, the second abutting discs 213 can be omitted, and only the first abutting discs 212 can also be For the electrode tool piece 5 to abut against, as long as the distance between the first abutting discs 212 and the abutment frame 17 is lengthened so that the electrode tool piece 5 can abut relatively stably.

The driving unit 3 is disposed on the base unit 1 and connected to the rollers 22 for driving the rotating members 21 to rotate. The driving unit 3 includes a motor 31 disposed on the mounting plate 18, a driving wheel 32 connected to the motor 31, a first track 33 surrounding and connecting the driving wheel 32 and one of the rollers 22, and a driving wheel 33 surrounding and connected to the driving wheel 32. The driving wheel 32 and the second crawler belt 34 of the other roller 22, the first crawler belt 33 and the second crawler belt 34 are spaced up and down from each other. The motor 31 can be, for example, a brushless DC motor, but not limited thereto. The shaft of the motor 31 is connected to the driving wheel 32 by passing through the through hole 181 . The driving wheel 32 is driven to rotate by the motor 31 , and then the rollers 22 are driven by the first crawler belt 33 and the second crawler belt 34 respectively, and finally the rotating members 21 can be connected to rotate synchronously. The magnetic element 4 is a cylindrical magnet, which is disposed between the front frame 13 and the lower grooves 132. It should be noted that any element that can generate magnetic force can be used. The electrode tool 5 is in the shape of a needle. In this embodiment, a commercially available micro-electrode with a diameter of 150 μm is used, and an electrode tool with a smaller diameter can be used to process micro-holes as required. The electrode tool member 5 is attracted by the magnetic attraction force of the magnetic member 4 to extend up and down against the first abutting disk 212 and the second abutting disk 213 of the rotating members 21 , and the upper end abuts the abutting frame 17. The electrode tool piece 5 can be driven to rotate by the frictional force between the rotating pieces 21 and the electrode tool piece 5 . It should be noted that, the upper grooves 131 and the lower grooves 132 are both V-shaped and the included angle is 90 degrees, and the tips of the upper grooves 131 and the lower grooves 132 are all facing the motor 31, so that the The vertical extension line of the shaft center of each rotating shaft 211 , the corresponding vertical extension line of the upper groove 131 and the lower groove 132 , and the vertical extension line of the shaft center of the motor 31 are all located on the same horizontal cross section. With this design, the rotating shafts 211 can be stably abutted against the upper grooves 131 and the The lower groove 132 rotates.

To sum up, the magnetic discharge machining device of the present invention uses the rotating members 21 of the rotating unit 2 to cooperate with the magnetic member 4 to attract the electrode tool member 5, so that the electrode tool member 5 can rotatably abut against the electrode tool member 5. Wait for the rotating part 21 to perform micro hole machining on the workpiece. When the electrode tool 5 needs to be replaced, it is only necessary to remove the electrode tool 5 against the magnetic attraction force of the magnetic member 4 without relying on any jig or disassembling or moving other components. The time required for disassembling and exchanging the electrode tool piece 5 can be shortened, the work efficiency can be increased, and the feasibility of automatic production can be improved, so the object of the present invention can indeed be achieved.

However, the above are only examples of the present invention, and should not limit the scope of the present invention. Any simple equivalent changes and modifications made according to the scope of the application for patent of the present invention and the content of the patent specification are still within the scope of the present invention. within the scope of the invention patent.

1: Base unit

11: Pedestal

112: side opening

12: Connection board

13: Front frame

14: Insulation sheet

15: Upper joint plate

16: Lower joint abutment plate

17: Abutment frame

18: Mounting plate

2: Rotating unit

21: Turning parts

211: Spindle

212: First Abutment Plate

213: Second Abutment Plate

22: Roller

3: drive unit

31: Motor

33: The first track

34: Second track

4: Magnetic parts

5: Electrode tool parts

Claims (10)

A magnetic discharge machining device, comprising: a base unit; a rotating unit, including two rotating parts extending up and down and synchronously rotatably arranged on the base unit, the rotating parts are arranged at intervals from each other; a magnetic an electrode tool part, which is attracted by the magnetic part and extends up and down against the rotating parts, and the electrode tool part can be driven by the rotating parts to rotate. The magnetic discharge machining device of claim 1, wherein each rotating member has a rotating shaft extending up and down and rotatably disposed on the base unit and a first abutting member fixedly sleeved on the rotating shaft discs, and the first abutting discs of the rotating parts are spaced apart from each other for the electrode tool parts to abut. The magnetic discharge machining device according to claim 2, wherein the rotating unit further comprises two rollers respectively fixedly sleeved on the rotating shafts and spaced apart from the first abutting discs. The electric discharge machining device further includes a driving unit disposed on the base unit and connected with the rollers, and the driving unit is used for driving the rotating parts to rotate. The magnetic discharge machining device of claim 3, wherein the driving unit comprises a motor disposed on the base unit, a driving wheel connected to the motor, a first wheel surrounding and connected to the driving wheel and one of the rollers A crawler belt and a second crawler belt surrounding and connecting the driving wheel and the other roller therein, the first crawler belt and the second crawler belt are spaced apart from each other. The magnetic discharge machining device of claim 4, wherein the base unit includes a base and a front frame fixed to the base, the base has a front opening, and the front frame surrounds the front opening And has two upper grooves and two lower grooves corresponding to the upper and lower positions of the upper grooves, wherein an upper groove and the corresponding lower groove are used for one of the rotating shafts. accommodating, wherein the other upper groove and the corresponding lower groove are jointly used for accommodating the other rotating shaft, and the magnetic member is arranged between the front frame and the lower grooves. The magnetic discharge machining device according to claim 5, wherein the upper grooves and the lower grooves are both V-shaped and the included angle is 90 degrees, and the tips of the upper grooves and the lower grooves are V-shaped. All face the motor, so that the upper and lower extension lines of the axis of each rotating shaft, the upper and lower extension lines of the corresponding upper groove and the lower groove, and the upper and lower extension lines of the shaft center of the motor are all located in the same horizontal section. on-line. The magnetic discharge machining device of claim 5, wherein the base unit further comprises an upper engaging plate connecting the front frame adjacent to the upper grooves and a base connecting the base adjacent to the lower grooves The upper ends of the rotating shafts are movably connected to the upper engaging plates, and the lower ends of the rotating shafts are movably connected to the lower engaging plates. The magnetic discharge machining device according to claim 7, wherein each rotating member further comprises a second abutting plate fixedly sleeved on the rotating shaft and spaced from the first abutting plate, and the rotating members The second abutting discs are spaced apart from each other for the electrode tool piece to abut against. The magnetic discharge machining device according to claim 5, wherein the base unit further comprises an abutment frame disposed on the base, and the abutment frame is for the upper end of the electrode tool to abut against. The magnetic discharge machining device of claim 5, wherein the base unit further comprises an insulating sheet disposed between the base and the front frame, the insulating sheet surrounding the front opening.

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