KR20140104884A - Jig-assembly fixing electrode for electric discharge machining and assembly for electrode and jig of nc work device in the electric discharge machining using the same - Google Patents

Abstract

The present invention relates to a jig assembly which can easily fix an electrode for electric discharge machining on an accurate location of a jig for an NC machine, and to an assembly structure of an electrode for electric discharge machining and a jig for an NC machine using the same. In particular, the present invention relates to a jig assembly, which can easily fix an electrode for electric discharge machining made of a material which is not hard like a graphite electrode, and thus, is difficult to be fixed by a screwing method, on an accurate location of a jig for an NC machine by a method of not using the screwing method, and to an assembly structure of an electrode for electric discharge machining and a jig for an NC machine using the same.

Description

TECHNICAL FIELD [0001] The present invention relates to a jig assembly for fixing an electrode for electric discharge machining, an electrode for electric discharge machining using the same, and a jig for a NC machining apparatus using the jig assembly. [0002] Japanese Patent Application Laid- SAME}

The present invention relates to a jig coupling body for fixing an electrode for electric discharge machining to a jig for an NC machining apparatus and a coupling structure using the jig coupling body. More specifically, the present invention relates to a jig coupling body for easily fixing an electrode for electric discharge machining, And a joint structure of an electric discharge machining electrode and a jig for an NC machining apparatus using the same.

Discharge machining refers to a method of processing a target object into a specific shape by utilizing physical and mechanical actions that occur when a discharge occurs between two electrodes. Such discharge machining is a finishing machining means for minimizing an error range of a precision metal mold, and the accuracy of the metal mold product is improved through electrical discharge machining.

In order to perform the electrical discharge machining, an electrode for electric discharge machining is required. Such an electrode for electric discharge machining is first machined by using an NC machining apparatus in a shape for electric discharge machining. After that, Discharge processing is performed. That is, in order to perform the electric discharge machining, the electrode for electric discharge machining must first be formed into a desired shape, and then the electrode for electric discharge machining machined to a desired shape must be mounted in the electric discharge machining apparatus and subjected to electric discharge machining.

In order to process the discharge machining electrode to a desired shape, the discharge machining electrode must be firmly fixed at the precise position of the jig for the NC machining apparatus so that accurate machining can be performed when the electrode is mounted on the jig for the NC machining apparatus. . Likewise, when the electric discharge machining apparatus uses the machined electric discharge machining electrode, the electric discharge machining electrode must be firmly fixed to the correct position of the electric discharge machining jig.

For this purpose, various methods for fixing and installing the electrode for electric discharge machining on the jig of the NC machining apparatus and the electric discharge machining apparatus have been studied. According to this prior art, Korean Patent No. 10-0879512 discloses an electrode for discharge machining and a jig Joint structure ', and Korean Unexamined Patent Publication No. 10-2008-0057378 discloses a' coupling structure of electrode and holder for electric discharge machining '.

However, the conventional techniques for fixing the electrode for electric discharge machining to a jig for an NC machining apparatus or an electric discharge machining apparatus are coupled and fixed by using screws, and it is cumbersome and inconvenient to fix the electrode at an accurate position. In particular, a graphite electrode is mainly used as an electrode for electric discharge machining. Such a graphite electrode is not rigid, and thus has a problem in fixing by a screw coupling method.

Due to such a problem, in the case of using an electrode for electric discharge machining as a graphite electrode, the graphite electrode is fixed by using an adhesive mainly at the precise position of a jig for an NC machining apparatus and a jig for an electric discharge machining apparatus. However, it is very cumbersome to fix the graphite electrode in an exact position by using an adhesive agent every time the operation is performed. In addition, a single graphite electrode may be used for installing a jig for a NC machining apparatus and for installing an electric discharge machining apparatus jig Fixing is very inefficient.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and provides a jig assembly capable of easily fixing an electrode for electric discharge machining to an accurate position of a jig for an NC machining apparatus and a joint structure of an electrode for electric discharge machining and a jig for an NC machining apparatus using the jig assembly. do.

In addition, the present invention provides a jig coupling body which is made of a non-rigid material such as a graphite electrode and can easily fix an electrode for electric discharge machining, which is hard to be engaged and fixed by a screw coupling method, at an accurate position of a jig for a NC machining apparatus, Electrode and a jig for a NC machining apparatus.

The jig combined body for fixing the electrode for electric discharge machining according to the present invention has a hollow hole (111) for fixing an electrode for electric discharge machining (20) having a central groove (24) formed on one surface thereof, A body (110) having a protrusion (114) protruding upwardly so as to have a gradually inclined inward shape; A contact member 120 which is fired by the protrusion 114 as it is inserted in the protrusion 114; A vertical moving member 130 inserted into the hollow hole 111 and moving up and down, and having a center hole 131; A sliding member 140 which is inserted into the center hole 131 and slides down the upper and lower movable members 130; The upper and lower movable members 130 engage with the hollow hole 111 in a state where the contact member 120 is inserted into the protrusion 114 to prevent the contact member 120 from being separated from the upper and lower movable members 120, An upper cap (150) for pressing the contact member (120) when the moving member (130) descends; And a lower cap 160 coupled to a lower portion of the body 110 in a state where the upper and lower movable members 130 are inserted into the hollow holes 111 to prevent the upper and lower movable members 130 from coming off do.

The jig assembling body 100 is formed in a state in which the centering groove 24 of the electric discharge machining electrode 20 is inserted into the tightening member 120 and the tightening member 120 is slid as the sliding member 140 slides. So that the electrode 20 can be fixed to the central groove 24.

Further, the joint structure between the electrode for electric discharge machining and the jig for NC machining apparatus according to the present invention uses the jig assembly 100 having the above-described structure, 10, the electrode 20 for electric discharge machining is fixed.

The jig combined body according to the present invention having the above-described structure, and the combined structure of the electrode for electric discharge machining and the jig for NC machining apparatus using the same, can effectively fix the electrode for electric discharge machining to the precise position of the jig for NC machining unit.

In addition, since the jig combination body according to the present invention, the electrode for electric discharge machining using the same, and the jig for NC machining device do not use a screw coupling method, the electrode for electric discharge machining, which is made of hard material such as graphite electrode, So that it can be easily fixed to the exact position of the jig.

1 is a view showing a state where a jig combination body according to an embodiment of the present invention is mounted on a jig for an NC machining apparatus,
2 is a view showing an electrode for electric discharge machining according to an embodiment of the present invention,
3 is an exploded perspective view of a jig combination according to an embodiment of the present invention,
4 is a cross-sectional view schematically showing a state in which the electrode for electric discharge machining is fixed to the jig combination body according to Fig. 3,
5 is a cross-sectional view schematically showing a state in which the electrode for electric discharge machining is released from the jig combination according to Fig. 3,
6 is a cross-sectional view schematically showing a state in which an electrode for electric discharge machining is fixed to a jig combination according to another embodiment of the present invention,
7 is a cross-sectional view schematically showing a state in which the electrode for electric discharge machining is released from the jig combination according to another embodiment of the present invention.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. Rather, the intention is not to limit the invention to the particular forms disclosed, but rather, the invention includes all modifications, equivalents and substitutions that are consistent with the spirit of the invention as defined by the claims.

Also, in the accompanying drawings, thickness and size are exaggerated for clarity of description, and thus the present invention is not limited by the relative size or thickness shown in the attached drawings.

Meanwhile, in this specification, relative terms such as 'above' and 'below' can be used to describe the relationship between configurations on the basis of the directions shown in the drawings, and the present invention is not limited by such terms.

The present invention relates to a jig assembly capable of easily fixing an electrode for electric discharge machining to a precise position of a jig for an NC machining apparatus, and a joint structure of an electrode for electric discharge machining and a jig for an NC machining apparatus using the same. Particularly, the present invention can easily fix an electrode for electric discharge machining, which is made of a non-rigid material such as a graphite electrode, in a screw joint manner, in a precise position of a jig for an NC machining apparatus, The present invention relates to a jig coupling body, an electrode for electric discharge machining using the jig coupling body, and a coupling structure of a jig for an NC machining apparatus.

FIG. 1 is a view showing a state where a jig assembly according to an embodiment of the present invention is mounted on a jig for an NC machining apparatus, and FIG. 2 is a diagram showing an electrode for electric discharge machining according to an embodiment of the present invention.

1 and 2, the joint structure between the electrode for electric discharge machining and the jig for NC machining apparatus according to the present invention comprises a jig for NC machining apparatus 10, an electrode for electric discharge machining 20 and an electrode for electric discharge machining 20, And a jig assembly 100 to be fixed to the jig 10 for a processing apparatus.

The NC machining apparatus jig 10 may be provided with mounting holes 11 at which predetermined jig assemblies 100 are mounted so that a plurality of jig assemblies 100 may be mounted.

The electrode for electric discharge machining 20 is provided with a center groove 24 formed on the opposite surface 22 of the machining surface to be machined by the NC machining apparatus and a center groove 24 formed around the center groove 24, A frame groove 26 and a plurality of fixing grooves 28 formed around the frame groove 26 at predetermined intervals.

The jig combination body 100 is inserted and mounted in the mounting hole 11 of the jig 10 and is fixed around the mounting hole 11 of the jig 10 by fixing the jig assembling body 100 mounted on the mounting hole 11 The fixing unit may be provided with a fixing unit for fixing the fixing unit. The jig assembly 100 is preferably provided with a flange 102 that extends outwardly to engage the mounting hole 11 and the fixing member includes a flange member 14 having a flange portion 13 for pressing the flange 102 And a fixing screw 15 for fixing the flange member 14 to the fixed-portion recombination portion 12 in a state in which the flange portion 13 presses the flange 102. The flange member 14 is inserted into the fixed portion recombination portion 12 so that the flange portion 13 is placed on the flange 102 after the jig combination body 100 is mounted on the mounting hole 11, The jig assembling body 100 can be fixed to the jig 10 by fixing the flange member 14 to the fixed portion recombining portion 12 so that the flange portion 13 presses the flange 102 using the flange portion 13.

Further, the electrode for electric discharge machining 20 is inserted and fixed in the upper part of the jig assembling body 100 with the center groove 24 therebetween. That is, the jig 10 and the electrode 20 according to the present invention are fixed by inserting the electrode 20 into the upper portion of the jig assembling body 100 in a state where the jig assembling body 100 is fixed to the jig 10, .

Hereinafter, the specific configuration of the jig assembling body 100 for fixing the electrode 20 to the upper side of the jig assembling body 100 will be described in detail.

FIG. 3 is a perspective exploded view of a jig combination according to an embodiment of the present invention, FIG. 4 is a cross-sectional view schematically showing a state in which an electrode for electric discharge machining is fixed to a jig combination body according to FIG. 3, 3 is a cross-sectional view schematically showing a state in which the fixing is released from the jig combination according to Figs.

3 to 5, a jig assembly 100 according to an embodiment of the present invention includes a body 110, a contact member 120, a vertical moving member 130, a sliding member 140, 150, a lower cap 160, and an elastic member 170.

The body 110 has a flange 102 formed on the outer surface thereof, a hollow hole 111, a side hole 112 connected to the hollow hole 111, A protrusion 114 protruding upward to have a shape inclined inward as the outer circumferential surface moves upward.

The contact member 120 is provided with a hollow hole 121 to be inserted into the protrusion 114. The protrusion 114 is inserted into the protrusion 114 and the protrusion 114 is inserted into the protrusion 114, And a groove 123 may be provided at an end of the gap 122 to facilitate the opening.

The contact member 120 has a structure in which the center groove 24 of the electrode 20 for electric discharge machining is inserted and in which the center groove 24 of the electrode 20 is inserted into the contact member 120, The electrode 20 is fixed to the jig assembling body 100 while the outer surface of the tightening member 120 is in close contact with the inner surface of the central groove 24 of the electrode 20. [

Preferably, a plurality of ribs 124 may be formed in a circumferential direction on the outer circumferential surface of the contact member 120. When the inner surface of the center groove 24 is in close contact with the outer surface of the contact member 120, the inner surface of the center groove 24 can be pressed by the rib 124, Can be more firmly fixed to the base 100.

The upper and lower movable members 130 are inserted into the hollow holes 111 of the body 110 and are coupled to the body 110 so that the upper and lower movable members 130 can move up and down. A hole 131 may be provided.

The sliding member 140 is inserted into the center hole 131 of the upper and lower movable member 130 and slides down to lower the movable upper member 130.

The upper cap 150 is engaged with the upper and lower movable member 140 inserted in the hollow hole 111 in a state in which the contact member 120 is inserted into the projection 114 to prevent the contact member 120 from coming off, And the contact member 120 is compressed when the moving member 140 descends.

The lower cap 160 is coupled to the lower portion of the body 110 in a state where the upper and lower movable members 130 are inserted into the hollow holes 111 to prevent the upper and lower movable members 130 from being separated.

The elastic member 170 is interposed between the lower cap 160 and the upper and lower movable members 140 to provide a predetermined elastic force upward.

Therefore, when the sliding member 140 is slid while the center groove 24 of the electrode 20 is inserted into the contact member 120, the upper and lower movable members 120, The contact member 120 is pressed by the upper cap 150 to be opened by the protrusion 114 so that the outer surface of the contact member 120 and the center of the electrode 20 The electrode 20 can be fixed to the jig assembling body 100 while the inner surface of the electrode assembly 24 is in close contact.

That is, the jig combination body 100 can fix the electrode 20 by a method in which the contact member 120 is in close contact with the center groove 24 formed in the electrode 20, The non-rigid electrode 20 for electric discharge machining such as a graphite electrode can be firmly fixed.

When the sliding member 140 is again slid reversely, the upper and lower movable members 130 are lifted again by the elastic force of the elastic member 170, The contact between the outer surface of the contact member 120 and the inner surface of the central groove 24 of the electrode 20 is released and the electrode 20 is released from the jig assembly 100 do.

Hereinafter, an embodiment in which the vertical moving member 130 is lowered as the sliding member 140 is slid will be described.

The body of the sliding member 140 is provided with a first inclined portion 141 inclined by a predetermined angle inward in a direction in which the outer circumferential surface slides and a sliding member And a second inclined portion 132 that is inclined at a predetermined angle upward in a direction in which the first inclined portion 140 is slid. When the sliding member 140 is slid, the first inclined portion 141 pushes the second inclined portion 132 of the upper and lower movable member 130, and the upper and lower movable members 130 can descend .

The body 110 may have a side hole 112 connected to the hollow hole 111 and a center hole 131 of the upper and lower movable member 130 may be connected to the side hole 112. Then, the sliding member 140 can be slid by the tool 16 inserted into the side hole 112. This configuration provides a great convenience when an operator intends to fix the discharge machining electrode 20 to the jig 10 for an NC machining apparatus by using the jig assembling body 100. [

1, the electrode 20 for electric discharge machining is fitted and fixed to the upper portion of the jig assembling body 100 in a state where the jig assembling body 100 is mounted on the mounting hole 11 of the jig 10. However, It is difficult to fix it in the lower part or the upper part. Therefore, by forming the side hole 112 on the side surface and inserting the predetermined tool 16 into the side hole 112 to slide the sliding member 140, the electrode 20 can be easily inserted into the jig combination body 100 of the present invention.

Also, the sliding member 140 may be provided so that the operator can slide the sliding member 140 by a predetermined force, but it is preferable that the operator can slide the sliding member 140 by the rotation of the tool 16.

A locking groove 113 is formed in the inner surface of the body 110 facing the side hole 112 and a tool 16 inserted into the side hole 112 is inserted into one side of the sliding member 140 And an engaging groove 142 is formed on the other side of the engaging groove 142 so as to be rotated by the rotation of the tool 16. When the sliding member 140 rotates, (Not shown). The sliding member 140 is rotated by the rotation of the tool 16 coupled to the coupling groove 142 so that the coupling portion 143 can be slid while being fastened to the coupling groove 113 of the body 110 .

According to this configuration, as long as the operator does not rotate the sliding member 140 in the opposite direction using the tool 16, the sliding member 140 is in a state of being fixed by fastening the fastening portion 143 and the fastening groove 113 So that the upper and lower movable members 130 can be maintained in a lowered state so that the inner surface of the center groove 24 is in close contact with the outer surface of the contact member 120 It is possible to maintain the state fixed to the jig combination body 100. [ Therefore, the operator can securely process the machined surface of the electrode 20 into a desired shape by using the NC machining apparatus in a state where the electrode 20 is firmly fixed.

The tool 16 has a shape 17 that has a shape corresponding to the inner surface of the coupling groove 142 so as to be fitted into the coupling groove 142 and a shape that is bent at a substantially right angle from one end of the shape portion 17, And a handle portion 18 for rotating the handle portion 18 in the axial direction.

The sliding member 140 may be formed separately from the jig assembly 100 so that the sliding member 140 may be inserted into the side hole 112 only when the electrode 20 is to be fixed. The body 110 is inserted into the hollow hole 111 of the body 110 together with the upper and lower movable members 130 in the state of being inserted into the center hole 131 of the body 110, . Thus, it is possible to prevent the sliding of the sliding member 140.

The upper portion of the body 110 is provided with a predetermined portion around the protrusion 114 so that the fixing groove 28 of the electrode 20 is inserted when the center groove 24 of the electrode 20 is inserted into the contact member 120. [ The fixing protrusions 115 protruding from the protrusions 114 are formed at predetermined intervals around the protrusions 114 such that a part of the bottom surface of the edge grooves 26 of the electrodes 20 is closely contacted with the fixing protrusions 115 A tight contact portion 116 may be provided. Then, when the electrode 20 is inserted into the upper portion of the jig coupling body 100, the electrode 20 can be more firmly fixed to the more accurate position.

An upper latching part 133 which is hooked on an upper latching protrusion 117 formed on the upper part of the body 110 when the latching part 130 is inserted into the hollow hole 111 of the body 110, And a lower locking protrusion 118 formed at the lower portion of the inside of the body 110 when the locking member is inserted into the hollow hole 111 of the body 110. [ A lower latching part 134 may be provided. When the upper and lower shafts 130 are inserted into the body 110, the center hole 131 of the upper and lower shafts 130 can be easily aligned with the side holes 112 of the body 110 do. The upper fastening portion 133 of the upper and lower movable members 130 may be formed to have a width smaller than that of the lower fastening portions 134 so that the width of the upper and lower movable members 130 . ≪ / RTI >

The upper and lower cap assemblies 130 and 130 may be further provided with an upper cap engaging portion 135 protruding from the upper engaging portion 133 so that the upper cap 150 is inserted into the hollow holes And the upper cap engaging portion 135 protruded above the upper engaging portion 133 of the upper and lower movable members 130 inserted into the hollow hole 111 in a state of being inserted into the upper and lower movable members 130, .

The upper cap 150 is provided with a pressing member 151 for pressing the contact member 120 when the upper and lower movable members 130 are lowered and a lower pressing member 151 coupled to the upper and lower movable members 130 with the pressing member 151 therebetween And a release preventing member 156 for preventing the pressing member 151 from coming off.

The pressing member 151 may be provided with an extended portion 153 formed on the upper portion thereof so as to press the contact member 120 when the hollow hole 152 and the upper and lower movable members 130 descend, A length portion 157 inserted into the hollow hole 152 of the pressing member 151 and engaged with the upper cap engaging portion 135 of the upper and lower movable members 130, A seating portion 158 may be provided which is extended outward to be engaged with and seated in a seating groove 154 formed in the upper portion of the compression member 151 when the hollow member 152 is inserted into the hollow hole 152 of the member 151.

The engagement between the upper and lower movable members 130 and the release preventing member 156 may be performed by the inner surface of the locking hole 136 formed in the upper cap engaging portion 135 of the upper and lower movable member 130, The operator can easily place the separation preventing member 156 on the upper portion of the seating portion 158 of the separation preventing member 156 by using a predetermined tool And may be provided with a coupling groove 159 for engaging with the upper and lower movable members 130. Particularly, the engaging groove 159 is a portion abutting against the bottom surface of the central groove 24 of the electrode 20 for electric discharge machining, and it is preferable that the engaging groove 159 is formed in the shape of a groove like that of a protrusion.

The uppermost engaging portion 137 may be further provided between the upper engaging portion 133 and the upper cap engaging portion 135 of the upper and lower movable members 130, The upper end of the upper cap engaging portion 135 of the upper and lower movable member 130 is hooked to the hollow hole 152 of the upper cap engaging portion 135.

The upper cap 150 may be formed of a separate member such as a compression member 151 and a release preventing member 156 as in the embodiment shown in the drawing, May be integrally formed as a single member.

4 and 5, the operation of the jig assembling body 100 according to an embodiment of the present invention will be described in detail.

Fig. 4 is a cross-sectional view schematically showing a state in which the electrode for electric discharge machining is fixed to the jig combination according to Fig. 3, and Fig. 5 is a sectional view schematically showing a state in which the electrode for electric discharge machining is released from the jig combination according to Fig.

4, the worker inserts the central groove 24 of the electrode 20 for electric discharge machining into the upper part of the jig assembling body 100 mounted on the mounting hole 11 of the jig 10, The shape of the tool 16 is inserted into the coupling groove 142 of the sliding member 140 through the side hole 112 and then rotated so that the sliding member 140 rotates The sliding member 140 is horizontally moved to the inside of the body 110 while screwing the sliding member 140 into the engaging groove 113 of the body 110.

When the sliding member 140 slides as described above, the first inclined portion 141 of the sliding member 140 pushes the second inclined portion 132 of the upper and lower movable member 130, (130) goes down.

The release member 156 and the pressing member 151 also descend along with the lowering of the upper and lower movable member 130 so that the pressing member 151 presses the pressing member 120, The electrode 20 is pressed against the protruding portion 114 of the body 110 so as to come into close contact with the inner surface of the central groove 24 of the electrode 20, (Not shown).

Therefore, the worker uses the NC machining apparatus to firmly fix the machining surface of the electrode 20 in the state where the electrode 20 for discharge machining is firmly fixed to the precise position of the jig 10 for NC machining apparatus by using the jig assembling body 100 It can be processed into a desired shape.

5, when the operator rotates the tool 16 in the opposite direction after the machined surface of the electrode 20 is formed into a desired shape, the fastening portion 143 and the fastening groove 113 are unfastened The sliding member 140 slides in the opposite direction (the direction of the arrow in Fig. 5), so that the pressure exerted by the first inclined portion 141 on the second inclined portion 132 is released. The upper and lower movable members 130 are lifted by the upward elastic force of the elastic member 170 so that the pressing member 151 and the release preventing member 156 are lifted and the pressing member 120 is pressed The contact member 120 is contracted again and the contact with the inner surface of the central groove 24 of the electrode 20 is released and the electrode 20 is separated from the contact member 20 , The jig combination 100 is released from the fixation.

Hereinafter, the jig coupling 200 according to another embodiment of the present invention will be described in detail with reference to FIGS. 6 and 7. FIG.

6 is a cross-sectional view schematically showing a state in which the electrode for electric discharge machining is fixed to the jig combination body according to the present embodiment, and Fig. 7 is a sectional view schematically showing a state in which the electrode for electric discharge machining is released from the jig combination according to this embodiment to be.

The jig coupling body 200 according to the present embodiment differs from the jig coupling body 100 according to the embodiment in that it does not include the elastic member 170. [ When the sliding member 140 is slid reversely, the upper and lower movable members 130 are moved upward again so that the distance between the contact member 120 and the electrode 20 Thereby releasing the fixation of the electrode 20 by releasing the adhesion of the inner side surface. However, the upward elastic force of the elastic member 170 must be applied to the inner surface of the electrode 20 in an amount sufficient to cancel the close contact between the inner surface of the electrode 20 and the tight contact member 120, The elastic force of the general coil spring used as the member 170 may not be sufficient to smoothly fix the electrode 20 and this may cause difficulty in separating the electrode 20 from the jig 10 for the NC machining apparatus have.

Therefore, in order to solve such a problem, the jig combined body 200 according to the present embodiment is constructed by changing the structure of other components so as to replace the function of the elastic member 170. Hereinafter, And the reference numerals and detailed descriptions of the components will be used to refer to the reference numerals and the detailed description in the jig combination body 100 according to the above embodiment.

6 and 7, the sliding member 240 according to the present embodiment is configured to move up and down the upper and lower movable members 230 as the sliding member 240 is inserted into the center hole 131 of the upper and lower movable members 230, to be. That is, the sliding member 140 according to the embodiment of the present invention is configured to merely lower the upper and lower movable members 130, but the sliding member 240 according to the present embodiment can lower the upper and lower movable members 230 .

The upper cap 250 is configured so as to be in direct contact with the sliding member 240 when the sliding member 240 is slid reversely.

Therefore, when the jig assembly 200 according to the embodiment of the present invention slides the sliding member 240 in an opposite direction to release the fixing of the electrode 20, the upper cap 250 directly contacts the sliding member 240 So that the upper and lower cups 230 are lifted together with the upper cap 250.

Hereinafter, a detailed description will be made of an embodiment in which the upper cap 250 and the upper and lower movable members 230 are lowered or raised as the sliding member 240 according to the present embodiment is slid.

The upper cap 250 includes an upper cap body 251 to be inserted into the hollow hole 111 of the body 110 and a lower cap body 251 to compress the contact member 120 when the upper and lower movable members 230 are lowered. And a length portion 254 extending to a lower portion of the upper cap body 251 and coupled to the upper cap engaging portion 135 of the upper and lower movable members 230 And the upper cap coupling portion 135 of the upper and lower movable members 230 may be provided with a coupling hole 232 to which the length portion 254 of the upper cap 250 is coupled, (232) may be achieved by screwing the inner surface of the fastening hole (232) to the outer surface of the length portion (254).

The fastening hole 232 may be formed so as to be connected to the center hole 131 of the upper and lower movable member 230. When the fastening hole 232 is coupled to the fastening hole 232, As shown in FIG. The length 254 has an end 255 protruding into the center hole 131 when the upper cap 250 is coupled to the upper and lower movable members 230.

The sliding member 240 includes a seating groove 241 on which the end portion 255 of the length portion 254 is seated when the up and down moving member 230 is lowered and a pair of seating grooves 241 on both sides of the seating groove 241 The first and second inclined portions 242 and 243 include a first inclined portion 242 and a third inclined portion 243 that are inclined at a predetermined angle in opposite directions to each other. And a second inclined portion 231 pressed by the inclined portion 242.

When the upper and lower moving member 230 is lowered to the sliding member 240 and the mounting groove 241 in which the end portion 255 of the length portion 254 is seated is provided, The electrode 20 can be fixed to the jig assembling body 200 in a more rigid state.

When the first inclined portion 242 and the third inclined portion 243 are inclined in opposite directions with respect to the seating groove 241 in the sliding member 240, As the member 240 slides, it can be lowered or raised by the first inclined portion 242 and the third inclined portion 243. For example, when the sliding member 240 is slid in one direction, the first inclined portion 242 may press the second inclined portion 231 to lower the upper and lower movable members 230, The third inclined portion 243 can press the end portion 255 of the length portion 254 that is seated in the seating groove 241 so that the upper and lower movable members 230 can be lifted up have.

The inclined direction of the first inclined portion 242, the second inclined portion 231, and the third inclined portion 243 may be variously formed according to the sliding direction. For example, when the sliding member 240 is slid in the direction of the engaging groove 113 (the direction of the arrow in Fig. 6) of the body 110 facing the side hole 112 from the side hole 112 of the body 110 The first inclined portion 242 may be formed so as to be inclined inward in the sliding direction and the second inclined portion 231 may be formed to be inclined upward in the direction in which the third inclined portion 243 May be formed to be inclined outward in a direction opposite to the inclining direction of the first inclined portion 242, i.e., in a sliding direction. When the sliding member 240 slides in the direction of the fastening groove 113 (the direction of the arrow in FIG. 6) in the side hole 112, the second inclined portion 231 is pressed upward by the first inclined portion 242, The end portion 255 of the length portion 254 can be seated and fixed in the seating groove 241 of the sliding member 240 while the sliding member 240 can be fixed to the locking groove 113 , The upper and lower movable members 230 are lifted as the end 255 of the length 254 is pressed against the third slant 243 (see FIG. 7) .

Therefore, the jig body 200 according to the present embodiment having the above-described structure can be lifted or lowered along the sliding direction of the sliding member 240 without the separate elastic member 170 . That is, when the sliding member 240 slides in one direction, the upper and lower movable members 230 according to the present embodiment are lowered as the second slopes 231 are pressed by the first slopes 242 And the end portion 255 of the length portion 254 can be lifted as the third inclined portion 243 is compressed when the sliding member 240 is slid in the opposite direction.

Preferably, as shown in the figure, the outer circumferential surface of the end portion 255 of the length portion 254 may be provided with an inclined portion 256 inclined at a predetermined angle. The end 255 of the length portion 254 can be smoothly compressed by the third inclined portion 243 when sliding the sliding member 240 in the opposite direction to raise the upper and lower movable members 230 So that the upward movement of the upper and lower movable members 230 can be performed more smoothly. In another embodiment, the end 255 of the length 254 may be rounded. Even when the end portion 255 has a rounded shape, the end portion 255 can be smoothly pressed by the third inclined portion 243.

The sliding member 240 protrudes outward from the outer circumferential surface of the body of the sliding member 240 at one side of the third inclined portion 243 (approximately at the end of the third inclined portion 243) And an engaging protrusion 244 to which the end portion 255 of the length portion 254 to be engaged is hooked. Not only the sliding of the sliding member 240 and thus the upward and downward movement of the upper and lower movable member 230 can be guided but also the sliding member 240 is moved in the opposite direction It is possible to prevent the sliding member 240 from being detached to the side hole 112 of the body 110 as the latching jaw 244 of the sliding member 240 is hooked on the end 255 of the length portion 254. [

Hereinafter, the operation of the jig assembling body 200 according to the present embodiment will be described in detail with reference to FIGS. 6 and 7. FIG.

6 is a cross-sectional view schematically showing a state in which the electrode for electric discharge machining is fixed to the jig combination body according to the present embodiment, and Fig. 7 is a sectional view schematically showing a state in which the electrode for electric discharge machining is released from the jig combination according to this embodiment to be.

6, the worker inserts the central groove 24 of the electrode 20 for electric discharge machining into the contact member 120 and inserts the tool 16 through the side hole 112 into the engagement of the sliding member 240 When the sliding member 240 is rotated after being inserted into the groove 142, the coupling member 143 is screwed into the coupling groove 113 of the body 110 while sliding, so that the sliding member 240 is slid 6).

When the sliding member 240 slides in this manner, the first inclined portion 242 of the sliding member 240 presses the second inclined portion 231 of the upper and lower movable member 230 and pushes it, The end portion 255 of the length portion 254 is seated in the seating groove 241 of the sliding member 240 while the upper portion 250 of the upper portion 250 is simultaneously lowered, The contact member 120 is pressed against the protruding portion 111 of the body 110 and fits to the inner surface of the central groove 24 of the electrode 20 , The electrode 20 can be fixed to the jig combination body 200.

7, when the operator rotates the tool 16 in the opposite direction after the machined surface of the electrode 20 is formed into the desired shape, the fastening portion 143 and the fastening groove 113 are unfastened The first slanting portion 242 and the second slanting portion 231 are disengaged from each other and the third slanting portion 243 is moved in the lengthwise direction The upper and lower caps 250 and 250 are lifted together and the pressing member 120 is released from the crimping process. The tightening member 120 is contracted again and the tight contact with the inner surface of the central groove 24 of the electrode 20 is released so that the fixing of the electrode 20 and the jig combination 200 can be released.

As described above, the present invention relates to a jig assembly capable of easily fixing an electrode for electric discharge machining to a precise position of a jig for an NC machining apparatus, and a joint structure of an electrode for electric discharge machining and a jig for an NC machining apparatus using the same, A jig assembly capable of easily fixing an electrode for electric discharge machining which is made of a non-rigid material such as an electrode and hardly fixed by a screw coupling method, to a precise position of a jig for a NC machining apparatus by a method not using a screw connection method, and a discharge The present invention relates to a coupling structure of a working electrode and a jig for an NC machining apparatus, and the embodiments can be modified in various forms. Accordingly, the present invention is not limited to the embodiments disclosed herein, and all changes which can be made by those skilled in the art are also within the scope of the present invention.

10: Jig for NC machining apparatus 20: Electrode for electric discharge machining
24: center groove 100, 200: jig coupling body
110: body 120:
130, 230: upper and lower shafts 140, 240: sliding member
150, 250: upper cap 160: lower cap
170: elastic member

Claims (3)

In the jig assembling (100, 200) for fixing the electrode (20) for electric discharge machining in which the central groove (24) is formed on one surface,
A body 110 having a hollow hole 111 and a protrusion 114 protruding upward to have a shape inclined inward as the outer circumferential surface moves upward;
A contact member 120 which is fired by the protrusion 114 as it is inserted in the protrusion 114;
Upper and lower movable members (130, 230) inserted into the hollow holes (111) and moving up and down, and having a center hole (131);
Sliding members (140, 240) for lowering the upper and lower movable members (130, 230) as they are inserted and slid into the center hole (131);
The protrusion 114 is engaged with the upper and lower movable members 130 and 230 inserted into the hollow hole 111 in a state where the contact member 120 is inserted into the protrusion 114 to prevent the contact member 120 from coming off, An upper cap (150, 250) for pressing the contact member (120) when the first member (130, 230) descends; And
And a lower cap 160 coupled to a lower portion of the body 110 in a state where the upper and lower movable members 130 and 230 are inserted into the hollow hole 111 to prevent the upper and lower movable members 130 and 230 from being separated from each other. ,
The jig assemblies 100 and 200 may be configured such that when the center groove 24 of the electric discharge machining electrode 20 is inserted into the contact member 120 and the sliding members 140 and 240 are slid, And the electrode (20) is fixed in close contact with the central groove (24). The method according to claim 1,
The electrode for electric discharge machining 20 is provided with an edge groove 26 having a depth smaller than that of the center groove 24 around the center groove 24 and a fixing groove 28 formed at a predetermined interval in the edge groove 26 Is formed,
A fixing projection protruding at a predetermined interval around the protrusion 114 so that the fixing groove 28 is inserted when the center groove 24 is inserted into the contact member 120, (116) protruding from the fixing protrusion (115) at a predetermined interval around the protrusion (114) so as to be in close contact with a part of the bottom surface of the rim groove (26) Characterized by a jig combination. In the joint structure of the electrode for electric discharge machining and the jig for NC machining apparatus for fixing the electrode for electric discharge machining 20 to the jig for NC machining apparatus 10,
A jig (10) for an NC machining apparatus;
An electrode (20) for electric discharge machining in which a center groove (24) is formed on the opposite surface (22) of the machining surface to be machined by the NC machining apparatus; And
And jig assembling bodies (100, 200) for fixing the electric discharge machining electrode (20) to the NC machining tool jig (10)
The jig combination (100, 200)
A body 110 having a hollow hole 111 and a protrusion 114 protruding upward to have a shape inclined inward as the outer circumferential surface moves upward;
A contact member 120 which is fired by the protrusion 114 as it is inserted in the protrusion 114;
Upper and lower movable members (130, 230) inserted into the hollow holes (111) and moving up and down, and having a center hole (131);
Sliding members (140, 240) for lowering the upper and lower movable members (130, 230) as they are inserted and slid into the center hole (131);
The protrusion 114 is engaged with the upper and lower movable members 130 and 230 inserted into the hollow hole 111 in a state where the contact member 120 is inserted into the protrusion 114 to prevent the contact member 120 from coming off, An upper cap (150, 250) for pressing the contact member (120) when the first member (130, 230) descends; And
And a lower cap 160 coupled to a lower portion of the body 110 in a state where the upper and lower movable members 130 and 230 are inserted into the hollow hole 111 to prevent the upper and lower movable members 130 and 230 from being separated from each other. ,
The jig assemblies 100 and 200 may be configured such that when the center groove 24 of the electric discharge machining electrode 20 is inserted into the contact member 120 and the sliding members 140 and 240 are slid, And the electrode (20) is fixed to the central groove (24) to fix the electrode (20).

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