JP3883879B2 - Wire electrode traveling path forming device for wire electric discharge machining and wire electric discharge machining device for end mill tool cutting edge - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a wire electric discharge machining jig useful for forming a blade portion of a torsion blade end mill tool, such as a ball end mill used in a machine tool such as a machining center, and facilitating the forming processing of the blade portion. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire electrode travel path forming apparatus and a wire electric discharge machining apparatus for cutting edge cutting such as an end mill tool equipped with the wire electrode travel path forming apparatus.
[0002]
[Prior art]
It is known that the cutting edge portion of an end mill tool is formed and processed using a wire electric discharge machining method, as described in, for example, Japanese Patent No. 2,828,423-4 and the drawings. That is, this is as follows.
In a method of machining the shape of the cutting edge portion of a total shape tool (total shape end mill or total shape tool) having a desired cutting edge shape to be obtained, a desired cutting edge shape formed on the total shape tool, Numerically controlled wire electrical discharge machining with a rotary indexing axis and taper function capable of indexing and positioning the rotary tip around a horizontal or vertical axis in advance by creating a cutting shape program including No. 2 flank shape Using the machine
Prepare the tool material of the above-mentioned general shape tool that has been pre-machined into the shank part and blade part according to the tool diameter and tool length in advance, and attach the shank part of the tool material to the work attachment part of the rotary indexing shaft And
A cutting edge machining step for executing the machining program prepared in advance and machining the cutting edge shape of the overall tool on the tool material, and a flank machining step for machining the second flank shape are continuously performed. Machining method of total shape tool by numerical control performed by wire electric discharge machining,
It is said.
[0003]
In other words, this is a numerically controlled wire electric discharge machine equipped with a taper machining function that is well known and widely used in the past. An overall tool is manufactured by numerical control wire electric discharge machining using a program created in advance. However, the manufacturing method of such a tool, for example, with a torsional blade, such as a ball end mill, as a peripheral envelope shape, a spherical tip with high dimensions and shape accuracy, a complicated plane and arc surface of various dimensions and shapes Application to processing and forming into a predetermined shape is quite difficult, and there is no success.
[0004]
FIG. 6 is a side explanatory view of a portion showing an example of the arrangement relationship between the processed part wire electrode 1 and the tool material 2 when such an end mill tool is processed and formed by the above-described conventional wire electric discharge machine. The wire electrode 1 is renewed and moved up and down opposite to the tip portions of a pair of upper and lower arms formed to extend forward (front of the page) above and below a column provided upright behind a bed (not shown). Guide blocks 3 and 4 are provided to position and form the processed portion 1A. In the drawing, the upper guide block 3 is arranged on one axis of the taper processing function, for example, in the horizontal direction of the drawing in the drawing with respect to the lower guide block 4. A state in which the movement part wire electrode 1 is tilted by about 60 ° with the movement bias positioned on the Y axis is shown.
[0005]
Reference numeral 5 denotes a table provided on the front left side of the bed, and an attachment positioning jig 6 for attaching the tool material 2 is mounted on the table 5, and the tool material 2 is rotated and indexed through the jig 6. The C axis 7 is provided so as to be able to control the rotation index around the Y axis and to be able to control and feed the horizontal Y axis. The upper and lower arms that support the table 5 and the processing portion wire electrode 1 via the upper and lower guide blocks 3 and 4 are controlled relative to the X axis direction orthogonal to the paper surface and the Z axis in the vertical direction of the paper surface. It is configured to move so that it can be positioned.
[0006]
In the case shown in the figure, the upper guide block 3 is pulled out from a guide 3B for inserting and positioning the wire electrode 1 in the substrate 3A, a nozzle 3C for injecting a processing liquid along the processing part wire electrode 1, and a wire electrode supply part (not shown). The lower guide block 4 is provided with a processing liquid jet nozzle coaxial with the processing portion wire electrode 1, while being provided with a guide roller 3 </ b> D that applies a predetermined braking force to the wire electrode 1 and supplies the guide to the guide 3 </ b> B. 4A, a positioning guide 4B inside, and a wire electrode 1 (not shown) accommodate a current-carrying piece (not shown) that contacts and energizes one terminal of the processing power supply, and has a cylindrical shape having a machining liquid introduction piping terminal, a power plug, etc. The wire electrode 1 made of the casing 4C and having passed through the processed portion is pulled and pulled by the downstream take-up roller 8 so as to have a predetermined tension.
[0007]
The tool material 2 mounting / positioning jig 6 described above is formed by using a round bar-shaped tool material 2 made of, for example, required tool steel, a WC-Co alloy cemented carbide, or the like on a base 6A of the jig 6. The rotary indexing shaft is concentrically and coaxially inserted into a cylindrical shrink fitting jig 6B made of, for example, stainless steel, and is positioned at a predetermined position by shrink fitting to be used for processing. Is.
[0008]
7A and 7B are a front view A of the tip of a two-blade ball end mill as an example, and a side view as viewed from the front side surface when A is rotated 180 °. In each of the cutting blades, the upper right cutting blade 210 in FIG. A will be described mainly with respect to the surface to be machined. 211 and 221 are the outer peripheral surfaces of the cutting blades 210 and 220, and 212 and 222 are the respective cutting blades 210 and 220. Front edge line, 213, 223, 214, 224, and 215, 225 are the first, second, and third flank faces, 216 is the rake face of the tip edge 210, and 217 is the side edge rake Surfaces 218 are flank surfaces between the side cutting edges.
[0009]
As is apparent from the drawing, the two-blade cutting blades 210 and 220 have an S-shape with a large curvature when viewed from the front, that is, have a predetermined twist and each of the leading edge ridgelines 212, Since 222 is raised in an arc shape or a spherical shape, not only the cutting blades 210 and 220 but also the rake surfaces 216 and 217 and the flank surfaces 213, 223, 215 and 225 following the cutting blades 210 and 220 are processed. It is difficult to form, and it is difficult to form by some general-purpose numerically controlled wire electric discharge machines as described above.
[0010]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an end mill tool having a desired cutting edge shape, that is, a ball end mill having a spherical shape with a high accuracy at the tip of a twisted blade that has conventionally been difficult to form automatically by wire electric discharge machining. Wire electrode travel path forming device, which is a jig for wire electric discharge machining, which enables a tool to be processed even from a solid tool material such as a round bar, and a wire electric discharge machining apparatus including the wire electrode travel path forming device Is to provide.
[0011]
[Means for Solving the Problems]
The object of the present invention is as follows: (1) a mounting base that is provided on one of the table or the processing head, or may be used by either the table or the processing head;
A swivel table attached to the surface of the mounting base via a pivot so as to perform swivel positioning at a desired angle along the surface; and swivel positioning drive means for the swivel table;
A support arm having a pair of guide blocks attached at an interval so as to form a stretched portion where the wire electrode is renewed;
A supporting arm turning control means mounted on the turning table so as to support one end side of the supporting arm as a fulcrum and to turn and position the other end perpendicularly to the surface of the turning table;
Wire electrode routing means for running and supplying the wire electrode to and from the processing portion between the guide blocks of the swivel support arm with respect to the wire electrode supply / takeout means provided around the mounting base, A rotary indexing shaft on which the tool material can be indexed and positioned, which is provided on the other of the table and the machining head capable of relatively controlling movement in three orthogonal axes, and the machining part wire electrode cross relative to each other. This is achieved by providing a wire electrode travel path forming device that is disposed facing.
[0012]
The object of the present invention is as follows. (2) The mounting base is provided horizontally on the table, and the rotary indexing shaft is provided on a vertical axis perpendicular to the table surface on the electrode mounting surface plate of the machining head. This is achieved by using the wire electrode travel path forming device according to (1).
[0013]
Further, the object of the present invention is as described in (3) above, wherein (3) the rotary indexing shaft is provided with holding means for automatic replacement / removal of the holder to which the tool material is attached. This is achieved by using the wire electrode traveling warp forming apparatus.
[0014]
The object of the present invention is as follows: (4) The turning table is a fan-like arc plate centered on the turning positioning pivot, and the turning positioning drive means is engaged with the outer peripheral arc of the plate. This is achieved by using the wire electrode travel path forming device according to (1), (2) or (3).
[0015]
Further, the object of the present invention is as follows: (5) The support arm is configured so that the length between the pair of guide blocks can be adjusted and set as required. ) Or (4) to achieve the wire electrode travel path forming device.
[0016]
The object of the present invention is as follows: (6) The above (1), (2), (3), (4) having a machining fluid injection nozzle along the machining part wire electrode in at least one of the pair of guide blocks. Or it is achieved by setting it as the wire electrode travel path | route formation apparatus as described in (5).
[0017]
The above-mentioned object of the present invention is as follows. (7) The turning positioning driving means and the supporting arm turning control means each have a required rotary encoder for detecting and positioning a rotation angle, respectively (1), (2), (3), (4), (5), or (6).
[0018]
The object of the present invention is as follows. (8) The table is a horizontal table of an electric discharge machine facing the machining head moving body of the main spindle that moves relative to the vertical axis in the machining tank (2). This is achieved by using the wire electrode travel path forming device described in (1).
[0019]
The object of the present invention is as follows. (9) An arc gear that meshes with a gear provided on the output shaft of the swivel positioning drive means is formed on the outer arc of the swivel table formed of the fan-shaped arc plate. This is achieved by using the wire travel path forming device according to (8) above, in which an arc cover that covers the arc gear is provided.
[0020]
The object of the present invention is as follows: (10) The wire according to (9), wherein a cleaning process fluid injection means is provided for the meshing portion of the arc gear and the output gear of the turning positioning drive means. This is achieved by using an electrode travel path forming device.
[0021]
Further, the object of the present invention described above is (11) in an apparatus for processing the shape of the edge part of an end mill tool having a required cutting edge shape to be formed,
A table fixed horizontally on the bed;
A machining head moving body provided with a machining head holding a spindle so as to be controlled to move vertically opposite to the table so as to be controlled and movable in two horizontal orthogonal axes;
A feed control servo motor that gives a control feed of a vertical axis to the table to the spindle;
A rotation control servo motor that operates with the main shaft as a rotary indexing shaft around the shaft;
Holding means provided at the tip of the spindle for automatic replacement and removal of a holder to which a tool material to be processed is attached;
A swivel table provided on a horizontal surface of a mounting base provided on the table via a pivot so as to perform swivel positioning at a desired angle along the surface;
A turning positioning drive means for the turning table;
A support arm having a pair of guide blocks attached at intervals so as to form a stretched portion where the wire electrode is renewed;
A supporting arm turning control means mounted on the turning table so as to support one end side of the supporting arm as a fulcrum and to place the other end in a direction perpendicular to the turning table surface;
Wire electrode supply and take-off means provided around the mounting base;
A wire electrode travel path forming means including a guide and a direction changing pulley that travels so as to supply and pull the wire electrode to a processing portion between the guide blocks of the pivoting support arm;
A power supply for wire electrical discharge machining that is fed between a wire electrode and a tool material for performing wire electrical discharge machining, a circulating supply device for machining fluid that causes the machining fluid to circulate in the machining section, and the vertical axis, horizontal Control including a numerical control device that reads and controls the two orthogonal axes, the rotation index axis of the main spindle, the automatic holder exchanging means to which the tool material is attached, the turning positioning drive means, and the support arm turning control means in accordance with a previously created program. This is achieved by using a wire electric discharge machining apparatus comprising the apparatus.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
1 is a front view of the wire electrode travel path forming device of the present invention installed on a horizontal biaxial machining table of a sculpting electric discharge machining apparatus, and from above the machining table or machining tank. The plan view shown in FIG. 2 and the plan view shown in FIG. 3 showing a state in which the turning table has turned about a quarter turning angle of the specification of the production machine from the state shown in FIG.
[0023]
Reference numeral 10 denotes a bed, and a processing table 11 is provided in a processing tank (not shown). The bed 10 and the processing table 11 are provided with a cross slide, and the processing table 11 or the processing tank with respect to the bed 10 is illustrated with an X axis in the front-rear direction perpendicular to the paper surface and a Z axis in the left-right direction along the paper surface. However, as will be described later, by moving the processing table 11 and the like, it is provided outside the processing tank with respect to the wire electrode travel path forming device provided on the table. In order to avoid fluctuations in tension caused by fluctuations in the length of the travel path from the supply and take-up means of the wire electrode, it is desirable that the processing table 11 be fixed to the bed 10.
[0024]
Although not shown, for example, a column is provided on the bed 10 so as to be controllable in the X axis perpendicular to the paper surface, and a moving ram is provided in the column so as to be controllable in the left and right Z axes parallel to the paper surface. The moving ram is provided with a processing head 9 having a main shaft 12 which is perpendicularly opposed to the processing table 11 and can be controlled and fed to the upper and lower Y axes parallel to the paper surface. The rotary indexing shaft 7 has a C-axis, and an electrode mounting surface plate 13 is provided at the tip of the main shaft as necessary. The holder with the tool material 2 attached to the electrode mounting surface plate 13 is automatically attached and detached. The holding means 14 is provided, and the automatic change means for the holder and a magazine for a tool material holder for storing a required number of holders attached with the tool material 2 provided on the side of the machining head 9 are not shown. ing.
[0025]
Reference numeral 15 denotes a mounting base for the wire electrode travel path forming apparatus of the present invention. In the illustrated embodiment, this is fixed on the table 11 in the processing tank, not on the electrode mounting surface 13 side of the processing head 9. Therefore, when configured as a dedicated machine, the mounting base 15 can also be used as the processing table 11 or the electrode mounting surface plate 13.
[0026]
Reference numeral 16 denotes a V-axis swivel table, which will be described later, attached to the surface of the mounting base 15 via a pivot 17 capable of swivel positioning at a required angle along the surface, and rotates the swivel positioning pivot 17 as shown. It consists of a fan-shaped arc plate having a desired angle at the center. A gear 16A is provided on the outer peripheral circular arc surface of the turning table 16, and an output pinion gear 18A of the turning positioning driving means 18 provided on the mounting base 15 is engaged with the gear 16A. The turning positioning drive means 18 incorporates a rotary servo motor and a rotary encoder having a high resolution of, for example, 800,000 divisions, etc., and can position the V-axis angle within 90 ° by fine control. it can. In other words, an arc-shaped cover 16B that covers the effective tooth portion of the gear 16A is provided between the arc-shaped gear 16A and the pinion gear 18A so that wire electric discharge machining waste or the like does not settle and accumulate. Although not shown, if further necessary, a nozzle for injecting the cleaning process liquid of the wire electric discharge machining liquid is provided at the meshing portion of the arcuate gear 16A and the pinion gear 18A. Is.
[0027]
Reference numeral 19 denotes a support arm having a pair of guide blocks 3 and 4 attached at an interval so as to form a stretch processing portion 1A in which the wire electrode 1 is renewed and moved. 6 is substantially the same as that described in FIG. 6 except that it is attached to a single arm-shaped support arm 19 at an interval. The end of the support arm 19 on the side where the guide block 4 is located is connected to the rotation output shaft of the support arm turning control means 20 fixed on the turning table 16, The tip end side of 19 is turned perpendicularly to the surface of the turntable 16 to position the inclination angle of the W axis.
[0028]
The support arm turning control means 20 incorporates a rotary servo motor and a high-resolution rotary encoder with 800,000 divisions, for example, and the support arm 19, that is, the processing portion 1 </ b> A of the wire electrode 1 is a turning table. 16, the inclination angle of the wire electrode processing portion 1A from the state parallel to the horizontal Z-axis up to 90 ° perpendicular to the state of standing parallel to the Y-axis on the YZ plane. Can be positioned.
[0029]
Then, the support arm 19 has the connecting portion to the rotation output shaft of the support arm turning control means 20 to which the guide block 4 is attached as the support arm base portion 19A in the axial direction, that is, the length of the wire electrode processing portion 1A. The length between the pair of guide blocks 3 and 4 to be determined is configured to be adjustable so that it can be adjusted and set as required, and the support arm base 19A is positioned and fixed at a predetermined length of the support arm 19, A loosening and tightening handle 19B that enables the support arm 19 to be extended and retracted is provided.
[0030]
Thus, on the XZ plane, the wire electrode processing unit 1A takes an arbitrary inclination angle that rises from a state parallel to the horizontal Z axis to a vertical state perpendicular to the XZ plane along the YZ plane as a W-axis operation. In the meantime, the rotation output shaft of the support arm turning control means 20 that connects and supports the base portion 19A of the support arm 19 is V-axis operation from a state parallel to the Z axis on the XZ plane along the plane. Since the wire electrode processing portion 1A can take various postures at an arbitrary inclination angle since it can be pivotally positioned over a range of about 90 ° horizontally and about 70 ° in the illustrated case. Relative movement in the X, Y, and Z axis directions given between the tool material 2 and the wire electrode processing portion 1A, and further rotation as a C-axis operation given to the tool material 2 as rotation around its central axis. Indexing It can be seen that the desired machining can be realized by giving a controlled posture that changes with time of various and complicated wire electric discharge machining between the two in combination with the controlled movement operation.
[0031]
Next, the supply of the wire electrode 1 that runs and stretches continuously between the pair of guide blocks 3 and 4 on the support arm 19 as described above to form a processing portion 1A having a predetermined axial length, The structure of the take-up will be described. In the case of the drawing, although not shown, the well-known and usual supply means and take-up means of the wire electrode 1 are both provided outside the processing tank on the left side of the processing portion. The wire electrode 1 sent out from the wire electrode supply means while controlling braking to a predetermined degree is fixed to a processing table 11 or a processing tank via a guide path, a guide pulley, etc. provided as necessary. The guide means 21 is guided downward by a supply-side direction change guide pulley 22A provided in the guide means 21, and the two guide pulleys 23A and 24A on the swivel plate 16 are passed through the positioning guide pulley 25A. Then, the support arm 19 is supplied from the guide block 4 side on the turning fulcrum side to the processing section 1A.
[0032]
In the processed portion 1A, the wire electrode 1 provided for wire electric discharge machining is pulled out from the guide 3B portion of the guide block 3 through the roller 3D, and passes through the positioning guide pulley 25B and the guide pulleys 24B and 23B. The direction change guide pulley on the take-off and discharge side guided upward by the guide means 21 or the guide pulley 26 and the direction change guide pulley 27 on the fixed side of the processing tank and provided coaxially with the direction change guide pulley 22A on the supply introduction side. After passing through 22B, the wire electrode processing portion 1A is taken up by a take-up means 8 (not shown) while maintaining a predetermined constant tension state, and is collected by a collection means such as a bucket.
[0033]
As described above, in the illustrated embodiment, the wire electrode 1 is supplied from one side and the left side of the wire electric discharge machining unit and is collected and collected. For example, the wire electrode 1 is supplied from the right side and collected from the left side. The wire electrode 1 can be configured to have a stretched travel route without a folded stretch travel route. Further, when there is a space on the mounting base 15 or in the processing tank or in the peripheral edge, both or one of the supply and take-out means of the wire electrode is connected to the mounting base 15 or the processing tank or the bed 10. Of course, it is provided by instructing the user. Similarly, as the pair of guide blocks 3 and 4 provided on the support arm 19, it is not necessary to use different guide blocks as in the illustrated embodiment, and the configuration is not limited to the illustrated one. Any shape or size may be used as long as it does not interfere with itself and surrounding inclusions during movement associated with the machining operation. However, in that case, it is preferable that the connection power supply of the wire electric discharge machining power source to the wire electrode 1 is performed on the supply electrode upstream side of the wire electrode machining portion 1A.
[0034]
Reference numeral 28 denotes a bearing interposed so that the mounting base 15 is received in the outer peripheral arc portion when the rotating table 16 is rotated by the driving means 18 around the pivot 17. In this case, the arc direction of the outer periphery of the rotating table 16 Are provided at a desired interval. As an example of the structure, as shown in a sectional view A and an assembly view B in FIG. The swivel table 16 floats on the rim 28E, for example, at four points on the circumference, in an annular gap formed between the outer periphery of the roller base 28B and the inner peripheral surface of the mounting recess 28C. It consists of a dust-proof duracon ring 28D fitted so as to be in sliding contact with the lower surface. In order to prevent dust from being applied to the bearing 28, it is preferable that the cleaning liquid is introduced into the bearing 28 in a pressurized state.
[0035]
Reference numeral 29 denotes a presser roller tool provided in the middle of the two bearings 28 in the outer peripheral arc portion of the turning table 16, and an example of the configuration thereof is an attachment for fixing to the attachment base 15 as shown in FIG. 5, for example. It consists of a tool 29A and a presser roller 29B, and the turning table 16 is brought into contact with the rollers 28A of the two bearings 28 at an appropriate pressure, so that the turning table 16 can be smoothly and smoothly turned. If necessary for assisting the dust, the arcuate surface portion on the mounting base 15 corresponding to the outer peripheral arc gear 16A of the swivel table 16 is swiveled at both ends or one end in the arc direction of the mounting tool 29A. It is preferable to provide a wiper 30 for scraping.
[0036]
Next, the edge line 212, 222 at the tip of the cutting edge of the ball end mill tool of the example shown in FIGS. 6A and 6B, the outer peripheral surface 211 of the cutting edge, various relief surfaces 213, 223, 214, 224, and 215, 225 Each of the rake face 216 of the tip cutting edge, the rake face 217 of the side cutting edge, the flank face 218 between the cutting edges, and the like is used for the wire electrode running path forming device of the present invention, and the fixed horizontal machining of the above embodiment. Die-sinking electric discharge machine equipped with a rotary indexing shaft (C-axis) that can be controlled to move about the three axes XY and Z with respect to the table 16 and that can be controlled to rotate around the vertical Y-axis. However, this does not explain the processing sequence of each processing surface, the processing program, etc. .
[0037]
(1) The outer peripheral surface 211 of the cutting blade,
Machining is performed by Y-axis feed with the W-axis angle set to 0 ° and the C-axis angle set to 12 °.
(2) Ridge surface 212 at the tip of the cutting edge,
With W axis 15 °, C axis 12 ° and V axis 12 °, machining by circular circular interpolation (G02) of XY2 axis, W axis up to 20 °, and C axis at angle -12 Machining while changing to °.
(3) first flank 213,
By setting the W axis 30 °, the C axis 12 °, and the V axis 12 °, machining by circular circular interpolation (G02) of the XY2 axis, the W axis up to 35 °, and the C axis -12 ° Process while changing.
(4) second flank 214,
Machining is performed by X-axis feed at a W-axis of 60 ° and a C-axis of 22.5 °.
(5) Third flank 215,
When the W axis is 60 °, the XY plane is sent in a direction inclined by 110 ° with respect to the Y axis.
(6) Rake face 216 of the tip cutting edge,
With the W axis 60 ° and the C axis 30 °, the XY plane is tilted from 1.5 ° to 110 ° with respect to the Y axis, and the C axis is changed to −30 ° for processing.
(7) Rake face 217 of side cutting edge,
Processing is performed by sending the C axis to the Y axis so that the C axis rotates with the lead at the W axis of 70 °.
(8) flank face 218 between the blades,
With the W axis 70 °, the C axis is rotated from 0 ° to 130 ° while being sent to the Y axis to be processed to form a lead relief.
[0038]
【The invention's effect】
As described above in detail, according to the wire electrode travel path forming apparatus of the present invention, the relative movement in the XYZ three-axis directions is possible between the machining table and the machining head opposite to the machining table. By attaching to a Die-sinker EDM with a rotary indexing shaft with a rod-shaped tool material mounted vertically or horizontally on the machining table, the end mill, a complex cutting blade, such as a ball end mill tool with twist, can be raked. An excellent effect is obtained that it is possible to process and form an outer spherical body composed of a surface and various flank surfaces by automatic control.
Thus, as a tool such as the ball end mill, instead of using the above-mentioned cemented carbide alloy material, diamond abrasive grains or superabrasive grains are embedded or sintered in the ridge line surface of the cutting edge tip, A tool with an aspect attached by welding or the like has been manufactured and provided. However, if the above-described apparatus of the present invention is used, the tool material having such abrasive grains attached as required can be used for the purpose. Therefore, it is possible to reliably form the tool to be processed with high accuracy and to provide it at a low cost.
[Brief description of the drawings]
FIG. 1 is a front view showing a main part in a state where a wire electrode travel path forming device according to an embodiment of the present invention is installed on a horizontal biaxial table of a sculpting electric discharge machine.
FIG. 2 is a plan view of a main part when the state of FIG. 1 is viewed from above.
3 is a plan view of the state in which the turning table is turned about an angle of about 1/4 of the specification around the pivot along the plane in the state shown in FIG. 1 as seen from above. FIG.
4A and 4B are a cross-sectional view A and an assembly view B showing an example of a bearing interposed between the mounting base and the turning table in the present invention.
FIG. 5 similarly shows an example of a pressing roller tool of a turning table with respect to a mounting base.
FIG. 6 is a side explanatory view of a portion showing an example of an arrangement relationship between a processed part wire electrode and a tool material when an end mill tool is processed by a conventional wire electric discharge machine having a taper processing function.
FIGS. 7A and 7B are a front view and a side view of a tip of an example of a two-blade ball end mill.
[Explanation of symbols]
1. Wire electrode
1A, Wire electrode processing part
2. Tool material
3, 4, guide block
3A, substrate
3B, 4B, guide
3C, nozzle
3D, guide roller
4A, coaxial injection nozzle
4C, casing
5. Table
6. Mounting jig
6A, base
6B, shrink fitting jig
7. Rotation index shaft (C axis)
8. Take-up roller
9 Processing head
10. Bed
11. Processing table
12. Spindle (Y axis)
13. Electrode mounting surface plate
14. Attaching / detaching holding means for automatic replacement
15. Mounting base
16, swivel table
16A, gear
17. Axis (V axis)
18. Turning positioning drive means
18A, pinion gear
19. Support arm (W axis)
19A, support arm base
20, Support arm turning control means
21, Guide means
22A, 22B, 27, Direction change guide pulley
23A, 24A, 23B, 24B, 26, guide pulley
25A, 25B, positioning guide pulley
26, 27, guide pulley
28. Bearing
29, Presser roller
210, 220, 2-flute ball end mill cutting blades
211, outer peripheral surface of the cutting blade
212, 222, the edge line of the cutting edge
213, 223, first flank
214, 224, second flank
215, 225, third flank
216, Rake face of cutting edge
217, rake face of side cutting edge
218, flank face between blades

Claims (11)

A mounting base which is provided on one of the table or the processing head, or which one of the table or the processing head may also be used;
A swivel table attached to the surface of the mounting base via a pivot so as to be swiveled at a desired angle along the surface;
A turning positioning drive means for the turning table;
A support arm having a pair of guide blocks attached at an interval so as to form a stretched portion where the wire electrode is renewed;
A supporting arm turning control means mounted on the turning table so as to support one end side of the supporting arm as a fulcrum and to turn and position the other end perpendicularly to the surface of the turning table;
Wire electrode routing means for causing the wire electrode to be supplied to and taken from a processing portion between the guide blocks of the revolving support arm with respect to the wire electrode supply / drawing means provided around the mounting base. ,
A rotary indexing shaft on which the tool material can be indexed and positioned, which is provided on the other of the table and the machining head capable of relatively controlling movement in three orthogonal axes, and the machining part wire electrode cross relative to each other. A wire electrode travel route forming device, characterized in that the wire electrode travel route forming device is arranged in a facing direction. The mounting base is provided horizontally on the table, and the rotary indexing shaft is provided on a vertical axis perpendicular to the table surface on the electrode mounting surface plate of the machining head. The wire electrode travel path forming device according to the description. The wire electrode travel path forming device according to claim 1, wherein the rotary indexing shaft is provided with holding means for automatic replacement / removal of the holder to which the tool material is attached. 3. The turning table is a fan-like arc plate centered on the turning positioning pivot, and the turning positioning drive means is provided to engage with an outer peripheral arc of the plate body. Or the wire electrode travel path forming device according to 3. 5. The wire electrode travel path forming apparatus according to claim 1, wherein the support arm is configured to be extendable and contractable so that a length between a pair of guide blocks can be adjusted and set as required. The wire electrode travel path forming device according to claim 1, 2, 3, 4, or 5, wherein at least one of the pair of guide blocks has a machining fluid ejection nozzle along the machining part wire electrode. 7. The rotary positioning driving means and the support arm turning control means each have a required rotary encoder for detecting and positioning a rotation angle, respectively. The wire electrode travel path forming device according to the description. 3. The wire electrode travel path formation according to claim 2, wherein the table is a horizontal table of an electric discharge machine facing a machining head moving body of a main spindle that moves relative to a vertical axis in a machining tank. apparatus. An arc gear that meshes with a gear provided on the output shaft of the swivel positioning drive means is formed on the outer peripheral arc of the swivel table formed of the fan-shaped arc plate, and an arc-shaped cover that covers the arc gear is provided. The wire electrode travel path forming device according to claim 8, wherein 10. The wire electrode travel path forming apparatus according to claim 9, wherein a cleaning process fluid injection means is provided at a meshing portion between the arc gear and the output gear of the turning positioning drive means. In an apparatus for processing the shape of the edge part of an end mill tool having a required cutting edge shape to be formed,
A table that is horizontally fixed on the bed and a machining head that is provided so that the machining head that holds the main shaft so as to control and move vertically opposite to the table can be controlled and moved in two horizontal orthogonal axes. Body,
A feed control servo motor that gives a control feed of a vertical axis to the table to the spindle;
A rotation control servo motor that operates with the main shaft as a rotary indexing shaft around the shaft;
Holding means provided at the tip of the spindle for automatic replacement and removal of a holder to which a tool material to be processed is attached;
A swivel table provided on a horizontal surface of a mounting base provided on the table via a pivot so as to perform swivel positioning at a desired angle along the surface;
A turning positioning drive means for the turning table;
A support arm having a pair of guide blocks attached at intervals so as to form a stretched portion where the wire electrode is renewed;
A supporting arm turning control means mounted on the turning table so as to support one end side of the supporting arm as a fulcrum and to place the other end in a direction perpendicular to the turning table surface;
Wire electrode supply and take-off means provided around the mounting base;
A wire electrode travel path forming means including a guide and a direction changing pulley that travels so as to supply and pull the wire electrode to a processing portion between the guide blocks of the pivoting support arm;
A power supply for wire electrical discharge machining that is fed between a wire electrode and a tool material for performing wire electrical discharge machining, a circulating supply device for machining fluid that causes the machining fluid to circulate in the machining section, and the vertical axis, horizontal Control including a numerical control device that reads and controls the two orthogonal axes, the rotation index axis of the main spindle, the automatic holder exchanging means to which the tool material is attached, the turning positioning drive means, and the support arm turning control means in accordance with a previously created program. A wire electric discharge machining apparatus comprising the apparatus.

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