Classifications

• • 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
  • B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
  • B23H7/02—Wire-cutting
  • B23H7/08—Wire electrodes
  • B23H7/10—Supporting, winding or electrical connection of wire-electrode

Definitions

• the present invention relates to a guide for supporting a wire electrode in a wire discharge processing machine, and in particular, to a three-point support guide which can withstand long-term use and is inexpensive. About.
• wire electrodes which are fed relative to a workpiece are generally provided with upper and lower electrodes arranged above and below the workpiece.
• the electrode is supported on a predetermined electrode feeding path by the electrode.
• a movable guide which is arranged so as to be close to the guide groove of the fixed guide portion and to be free to approach the fixed guide portion. It is known that the wire electrode is point-supported by a wire member.
• these guide portions are made of a wear-resistant material, such as a sapphire.
• the present invention solves the above-mentioned drawbacks of the conventional three-point support guide, and improves the wear resistance of the guide part that slides and frictions with the wire electrode, thereby extending the service life of the guide. Still another object is to reduce the size of the guide portion so that the guide can be manufactured at a low cost.
• the three-point support guide of the wire electric discharge machine is arranged so that the three-point support guide faces the wire insertion hole formed in the three-point support guide.
• the first guide consisting of a small-diameter thin-walled diamond buried in the main part of the point support guide and formed with a guide groove for guiding the wire electrode.
• a second guide member is arranged so that the three-point support guide faces the wire insertion hole formed in the three-point support guide.
• the guide groove of the first guide member buried in the main body of the guide, and the movable member capable of approaching and separating from the first guide member are provided. Since the wire electrode is supported at three points by the second guide member embedded in the wire, the wire electrode can be stably supported. Also, since both guide members are made of a hard diamond that can withstand the sliding friction with the wire electrode well, the guide can be used for a long period of time. The frequency of the required replacement work can be greatly reduced, and the productivity of the wire discharge processing machine can be improved. In addition, a small-diameter thin-walled diamond is used for both guide members. As a result, it is not necessary to use a large amount of expensive diamond and the cost of the guide can be reduced.
• FIG. 1 is a schematic longitudinal sectional view showing a three-point support guide according to an embodiment of the present invention
• FIG. 2 is a partial schematic bottom view showing a movable member of a peripheral guide and its peripheral structure
• FIG. 3 is a schematic enlarged cross-sectional view taken along the line II-II of FIG. 2 showing the second guide member and its peripheral configuration of the peripheral guide
• FIG. 4 is a view showing the first guide member and the surrounding structure.
• FIG. 5 is a partially exploded perspective view showing the second guide member and the movable member
• FIG. 6 is a guide provided with a three-point support guide.
• FIG. 4 is a partially broken schematic side view showing a mechanism.
• FIGS. 1 to 5 show a three-point support guide of a wire electric discharge machine according to an embodiment of the present invention. It is designed to be mounted on a guide mechanism 2 (FIG. 6) described later.
• the guide 1 has a main body 10, and the main body ⁇ 0 is a cylindrical body having a flange 11 at one end, and a working fluid is introduced into the flange 11. A hole 11a and an appropriate number of port through holes (one is indicated by 11b) are drilled.
• a wire electrode insertion hole 12 whose both ends are enlarged is formed along the axis of the main body part 10, and an insertion hole 1 is formed in the middle part of the main body part 10.
• a substantially rectangular notch 13 in bottom view communicating with 2 is formed.
• a first semi-disc-shaped guide member 20 is embedded so as to face the wire electrode insertion hole 12.
• the first guide member 20 is fitted into the concave portion 31 of the semicircular support member 31 within the one-side enlarged-diameter portion of the through hole 12, so that the first guide member 20 is fitted. While being sandwiched between the support member 31 and the semicircular support member 32 (the members 31 and 32 form the first support member), the ruby is adhesively crimped into the insertion hole 12. -It is interposed between the guide 33 and the step surface of the main body 10. Then, as shown in FIGS. 3 and 4, the first guide member 20 preferably has a diameter and a thickness not more than several times the diameter of the wire electrode 00. It is a small-diameter, thin-walled, semicircular diamond that is of the order.
• the through hole 12 has an end face on the side of the wire 12 for guiding and supporting the wire electrode 100.
• a V-shaped guide groove 21 is formed.
• the thickness of the guide member 20 is set to be about 0.5 times or more the diameter of the wire electrode from the viewpoint of wire supportability and wear resistance, and the dimension of the groove 21 is
• the support members 31 and 32 are made of, for example, stainless steel, and are set according to the diameter of the wire electrode.
• a semi-circular groove 31a and a V-shaped groove 32a for avoiding contact with 100 are formed respectively.
• the guide member 20 is provided with a plating, and is fixed to the support members 31 and 32 by silvering. Reference numeral 34 in FIG.
• a movable member 40 is mounted on the notch 13 side of the middle portion of the outer peripheral wall of the main body 10, and the movable member 40 is disposed in the notch 13 of the main body 10,
• the guide member 20 is located close to and away from the guide member 20. That is, the movable member 40 includes a panel member 4 whose one end is formed in a substantially U-shape in cross section. The base end of the spring member 4 ⁇ is between the pair of support plates 51, 52.
• the movable member 40 includes a support member 53 as a second support member disposed on a free end side of the panel member 41, and the member 53 is, for example, a movable member.
• the member 53 is, for example, a movable member.
• it is made of a stainless steel, and tapered on both sides, and is tightened and held by a panel member 41.
• a groove 53 a is formed on the surface of the support member 53 on the side opposite to the panel member 41 along the transmission path of the wire electrode ⁇ 00, and the groove 53 a is formed.
• a plastic material 54 as an electrical insulating layer is disposed on the wire, and the wire electrode 100 and the movable member 40 are connected to each other, and thus the electrode ⁇ 00 and the guide 1 are connected to each other. Electrical isolation is provided.
• the movable member 40 has a semi-disc shape and preferably has a diameter and thickness which are several times less than the diameter of the wire electrode in the direction opposite to the first guide member 20.
• a second guide member 60 which is a small-diameter thin-walled diamond of the slider, is embedded. That is, the second guide member 60 is provided with a plating in advance, and a step portion formed on the free end side of the support member 53 so as to face the first guide member 20. 5 3 b, and silver It is fixed by brazing.
• FIG. 6 shows a guide mechanism incorporating the three-point support guide ⁇ configured as described above, and is connected to a guide base 201 of the guide mechanism 2.
• Guide 1 is fixed to pedestals 2 and 3 secured by 202 with ports 204.
• a die base 205 for accommodating the guide ⁇ is fixed to the pedestal 203 by a bolt 206, and a nozzle 207 is fixed to the base 205. It is screwed and fixed, and the cylinder 2Q8 is provided integrally.
• the piston rod 209 slidably disposed in the cylinder 208 is provided with one end of a piston rod 209 a integral with the piston 209, and a guide rod is provided.
• the panel member 41 of the door can be pressed.
• a holding member 20 holding the other end of the piston rod 209a is combined with the cylinder 208, and the holding member 21.0 is rotated to rotate the holding member 20.
• the set load of the spring 21 interposed between the piston 209 and the holding member 210 is adjusted, that is, the pressing force on the panel member 4 is adjusted.
• Reference numeral 2 12 denotes a compressed air supply pipe. When compressed air is supplied through the pipe 2 12, the piston 209 becomes a spring of the spring 2 1 1. It is displaced to the right in Fig. 6 against the force.
• Reference numeral 2 13 denotes a processing liquid supply pipe, and the processing liquid supplied via the pipes 2 to 3 is formed on the flange portion 11 of the guide 1.
• the operation of the three-point support guide 1 will be described.
• the compressed air is supplied to the cylinder 1 on the guide 1 side of the cylinder 208 via the compressed air supply pipe 212. (Not shown) to displace the piston 209 to the right in FIG. 6 so that the spring force of the spring 211, that is, the piston rod 209a is applied.
• the movable member 40, and thus the second guide member 60 buried in the member 40, is pressed against the panel member 41 by the first guide member 20. Let it rest.
• the wire electrode 100 is connected to the wire electrode insertion hole (not shown) formed in the guide base 201 of the guide mechanism 2 and the wire of the three-point support guide 1.
• Ear electrodes ⁇ Pass the wires by inserting them through holes 1 and 2. After the connection is completed, the supply of the compressed air to the cylinder 208 via the pipe 212 is stopped. At this time, since the wire electrode 100 is disposed in the guide groove 21 of the first guide member 20, the compressed air is cut off and the spring is cut off. The piston 209 is displaced to the left in FIG. 6 by the spring force of 21, and the panel member is formed by the piston rod 200 a integral with the piston 209. 4 When 1 is pressed, the wire electrode 100 is separated by the guide groove 2 ⁇ of the first guide member 20 and the opposing end face of the second guide member 60. Three points are stably supported.
• both guide members 20 and 60 are made of hard diamond, they have good resistance to sliding friction with wire electrode 100 and guide 1 has a long length. It can be used over a period of time and does not require frequent replacement.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=14805291

Family Applications (1)

Country Status (5)

Families Citing this family (4)

Citations (2)

Family Cites Families (15)

• 1986
  • 1986-05-28 JP JP61121198A patent/JPS62282823A/ja active Granted
• 1987
  • 1987-05-21 US US07/146,829 patent/US4833291A/en not_active Expired - Fee Related
  • 1987-05-21 WO PCT/JP1987/000326 patent/WO1987007194A1/ja not_active Ceased
  • 1987-05-21 DE DE8787903419T patent/DE3777110D1/de not_active Expired - Lifetime
  • 1987-05-21 EP EP87903419A patent/EP0271583B1/en not_active Expired - Lifetime

Patent Citations (2)

Non-Patent Citations (1)

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