JPS62166907A - Positioning supporter for bar rotary machining tool - Google Patents

Abstract

PURPOSE:To keep the shaft center of a machining tool in high accuracy as well as to make high speed machining performable, by improving the supply of cutting oil and the discharge of chips so good enough at the time of boring after positioning the bar rotary machining tool to a workpiece via a jig. CONSTITUTION:A boring bar 7 as a bar rotary machining tool where plural cutting tools are tightly installed is passed through support holes 78, 83 and 79 of a jig 8, and positioned (184) through a bearing hole 11 of a work W. The boring bar 7 is rotated at high speed, and the bearing hole 11 is bored by a cutting tool 63. Cutting oil is fed to an interval between a bearing 82 and an inner sleeve 162. Chips are discharged through a clearance installed in a bearing 77.

Description

DETAILED DESCRIPTION OF THE INVENTION A0 OBJECTS OF THE INVENTION (1) Industrial Application Field The present invention relates to a positioning and supporting device for a rod-shaped rotary machining tool that is movable in the axial direction and rotatable about the axis.

(2) Prior Art Conventionally, such a rod-shaped rotary processing tool, for example, a boring bar of a boring machine, is operated by inserting a cylindrical guide bar provided on the boring bar into a circular hole of a guide post at a fixed position. Positioned.

(3) Problems to be solved by the invention However, when cutting fluid, chips, etc. enter the guide post, galling occurs in the sliding part between the guide bar and the guide post, making it difficult to accurately center and position the guide post. become.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a positioning and supporting device for a rod-shaped rotary machining tool that enables highly accurate centering and positioning regardless of the intrusion of cutting fluid, chips, etc. purpose.

B0 Structure of the invention (Means for solving 11 problems) The device of the present invention includes:
A support cylinder that is basically a regular polygon and has an arcuate sliding surface at each vertex, and is attached to a rod-shaped rotary machining tool with a bearing interposed; The support tube is disposed at a fixed position so that it can be inserted and removed in response to axial movement, and has a basically circular support hole having an inner diameter corresponding to the sliding surface, and the inner surface of the support hole has the aforementioned support tube. a support member in which relief grooves extending in the axial direction, the same number as the number of sliding surfaces, are provided at equal intervals in the circumferential direction; and a guide mechanism for angularly displacing the support cylinder so that the sliding surface that has been in contact with the support tube comes into sliding contact with the inner surface of the support hole.

(2) Operation When the rod-shaped rotary machining tool is advanced during machining, the support tube is inserted into the support hole of the support member, but at this time, the sliding surface of the support tube corresponds to the relief groove of the support hole. Since there is a sufficient gap between the inner surface of the support hole and the outer surface of the support tube, the support tube can be easily inserted. In addition, after the insertion starts, the support tube undergoes an angular displacement while moving forward a certain distance, and the sliding surface slides against the inner surface of the support hole to determine the position, so there is enough time to remove chips, etc. At the same time, highly accurate positioning becomes possible. Moreover, even after positioning, there is a gap between the relief groove on the inner surface of the support hole and the outer surface of the support cylinder, so that chips and the like can be discharged from the gap.

(3) Example Hereinafter, an example in which the present invention is applied to a boring processing device will be explained with reference to the drawings. First, in FIGS. 1 and 2, this boring processing device 1 is A pillar 3 is erected, a drive mechanism 4 is disposed to be able to move up and down at a position corresponding to a processing station S set on the base 2 on the side of the pillar 3, and a drive mechanism 4 that moves up and down the drive mechanism 4. A feeding mechanism 5 for driving, a plurality of tool heads 6, for example, four, which are selectively switched and removably fixed to the lower part of the driving mechanism 4, and the upper end of which is removably connected to each tool head 6, and a lower part of the driving mechanism 4. a boring bar 7 as a rod-shaped rotary machining tool extending in the direction of the bore bar 7; and a plurality of, for example, four, supporting jigs that are selectively switched and fixed to the lower part of the column 3 at a position corresponding to the boring bar 7, that is, a position corresponding to the machining station S. 8, a workpiece support mechanism 9 for supporting and positioning a workpiece W carried into the processing station S, for example, a cylinder head having five camshaft bearing holes 11 concentrically spaced apart from each other; It includes a conveyance mechanism 10 that controls the loading of the workpiece W into the processing station S and the conveyance mechanism 10 that controls the loading of the workpiece W into the processing station S.

The drive mechanism 4 includes a lifting table 12 horizontally arranged above the processing station S so as to extend outward in the radial direction from the support column 3, and a rotary drive motor 13 supported and fixed on the upper surface of the lifting table 12. Equipped with.

The rotary drive motor 13 is arranged with its output shaft 14 being vertical, and the lower end of the output shaft 14 is connected to the lifting platform 12.
It rotatably penetrates the lifting platform 12 so as to protrude downward from the lower surface of the board. Moreover, the lower end of the output shaft 14 has a structure that allows spline connection by fitting the rotary shaft 54 of the tool head 6 from below. Also,
This rotary drive motor 13 has a built-in fixed position stop mechanism that allows the cutting tool 63 of the boring bar 7 to always accurately face in the direction opposite to the column 3 when the rotation is stopped.

Referring also to FIG. 3, the feed mechanism 5 is the drive mechanism 4.
A threaded rod 15 that is screwed onto the lifting table 12 and extends vertically, and a feed motor 16 for rotationally driving the threaded rod 15.
Equipped with. The threaded rod 15 is arranged to extend vertically along the outer surface of the support column 3, and its middle portion is screwed into the threaded hole 17 of the lifting table 12. Further, the upper and lower ends of the threaded rod 15 are rotatably supported by the support column 3, and the feed motor 16 is connected to the upper end of the threaded rod 15 and fixed and disposed on the upper portion of the support column 3. Moreover, feed motor 1
6 can freely switch its rotation direction between forward and reverse directions.

A pair of guide rails 18 extending vertically are fixed in parallel to the outer surface of the support column 3 on both sides of the threaded rod 15, and the lifting platform 12 is fitted into these guide rails 18. Therefore, the elevating table 12 is prevented from angularly displacing the threaded rod 15 around its axis, and moves up and down along both guide rails 18 in accordance with the rotation of the threaded rod 15 due to the operation of the feed motor 16.

Further, a pair of balance cylinders 19 extending vertically are fixed to the upper part of the column 3 in correspondence with both sides of the lifting table 12, and rods that slide into each balance cylinder 19 are fixed to the lifting table 12.

As a result, the lifting platform 12 moves up and down while maintaining a horizontal attitude.

Further, with reference to FIG. 4, each tool head 6 is
Boring bars 7 of different types are connected and supported to accommodate changes in the type of work W, and are arranged around the support 3 at intervals of 90 degrees. These tool heads 6 are each supported by a head carrier 22, and by moving the head carrier 22 around the support column 3, any tool head 6 and boring bar 7 can be connected to the processing station S, that is, the drive mechanism 4. You can bring it to the position you want.

The upper outer surface of the column 3 has a cross section that opens downward.
A U-shaped upper guide member 23 is fixed in an arc shape along a virtual circumference centered on the center position of the support column 3, excluding the drive mechanism 4. Further, at a lower part spaced apart from the upper guide member 23, a lower guide member 24 is supported by a bracket 25 and has a U-shaped cross section that opens upward, and has an arc shape corresponding to the upper guide member 23. It is fixed to the outer surface of 3.

On the other hand, the elevating table 12 in the drive mechanism 4 includes the elevating table 1
When the upper guide member 2 is located at the predetermined uppermost position, the upper guide member 2
3, and a lower guide groove 27 that connects to the lower guide member 24 is provided, and both guide grooves 26.27 have the same radius of curvature as the radius of curvature of the upper and lower guide members 23.24. It is curved.

Each head carrier 22 has the upper and lower guide members 23.2.
It is curved in an arc shape with a radius of curvature corresponding to 4, and is disposed between the upper and lower guide members 23 and 24. Also, between each head carrier 22, a connecting piece 28 curved in an arc shape like the head carrier 22 is arranged, and each head carrier 22 is connected to the adjacent connecting piece 28, respectively.

That is, connecting arms 29 projecting outward are provided at both circumferential ends of the head carrier 22, and connecting pins 30 are implanted at the tips of these connecting arms 29, respectively. On the other hand, on the outer surface of the connecting piece 28, a connecting collar 31 is protruded over the entire circumference at a position above the connecting arm 29, and the connecting pin is inserted into connecting holes 32 bored at both ends of the connecting collar 31. 30 from below, each head carrier 22 and each connection piece 28 are connected to each other.

Sector gears 33 and 34 are fixed to the top of each head carrier 22 and the top of each connection piece 28, respectively.
These sector gears 33, 34 constitute an internal gear 35 as a whole.

Further, a plurality of rollers 36 and 37 that can be moved within the upper guide member 23 and the upper guide groove 26 are pivotally supported on the upper part of the head carrier 22 and the upper part of the connecting piece 28, respectively. Further, at the lower part of the head carrier 22 and the lower part of the connecting piece 28, there are a plurality of rollers 38, 39 that can be moved within the lower guide member 24 and the lower guide groove 27, and the outer upper edge of the lower guide member 24 and the lower guide groove 27. A plurality of rollers 40 and 41 that can be moved on the outer upper edge of the roller are respectively supported. As a result, each head carrier 22 and each connecting piece 28 are connected to each other, and between the upper and lower guide members 23 and 24, as well as between the upper and lower guide members 23 and 24.
It can be moved guided between the lower guide grooves 26, 27, ie rotated around the column 3.

An indexing mechanism 42 is provided to rotate each head carrier 22 and connecting piece 28 in this manner and bring any desired head carrier 22, ie, tool head 6, to the position of the drive mechanism 4. This index mechanism 42 is
an index moke 43; a gear box 44 containing a gear train (not shown) for decelerating and transmitting the driving force of the index moke 43; It consists of a drive gear 46 that meshes with the drive gear 46. The gear box 44 is fixed to the upper part of the support column 3, and the index moke 43 is fixed and supported to the upper part of the gear box 44. The output shaft 45 projects downward from the gear box 44, and a drive gear 46 is fixed to the lower end of the output shaft 44.

According to the index mechanism 42, the internal gear 35, that is, the head carrier 22 and the connecting piece 28 are rotated by the operation of the index moke 43, so that a desired head carrier 22 can be brought below the drive mechanism 4.

Referring also to FIG. 5, the tool heads 6 are supported by the head carriers 22 so as to be able to move relative to each other upward. That is, the head carrier 22 has support arms 47 integrally projecting below each of the connection arms 29, and support bins 48 and 49 are provided upright on each connection arm 29 and each support arm 47, respectively. be done. On the other hand, the tool head 6 is provided with upper and lower arms 50.51 that can be placed on the connecting arms 29 and the supporting arms 47. Through holes 52 and 53 through which .49 can be inserted are formed respectively. Moreover, the thickness of each arm 50, 51 is determined to be smaller than the length of the support pin 48.49, and the support pin 48.49 is connected to the through hole 5.
2.53, it is possible to move the arm 6 upward relative to the head carrier 22 so as to separate the arms 50, 51 upward from the connecting arm 29 and the supporting arm 47. be.

A rotary shaft 54 whose axis is vertical is rotatably supported on the tool head 6, and this rotary shaft 54 is rotatably supported around the axis.
Both upper and lower ends of the tool protrude from the tool head 6. In addition, the length of the upward protrusion of the rotating shaft 54 from the tool head 6 does not reach the lower end of the output shaft 14 in the drive mechanism 4 when the arms 50 and 51 are placed on the connecting arm 29 and the supporting arm 47. First, when the tool head 6 is raised and fixed to the drive mechanism 4, the upper end of the rotating shaft 54 is splined to the lower end of the output shaft 14.

In order to fix the tool head 6 to the drive mechanism 4, a plurality of locking members 55, for example four, are provided on the upper surface of the tool head 6.
is fixed. These locking members 55 have engagement grooves 56 that are approximately T-shaped in cross section, and are fixed so that these engagement grooves 56 extend along the circumference around the rotation center of the tool head 6. Placed. On the other hand, four clamp cylinders 57 are fixed and supported on the upper surface of the elevating table 12 in the drive mechanism 4, corresponding to each of the locking members 55. These clamp cylinders 57 are arranged with their axes vertical,
The rod 58 movably penetrates the lifting table 12 and protrudes below the lifting table 12, and the lower end of the rod 58 has a substantially T-shaped locking member that can be engaged with the locking groove 56 of each locking member 55. A joint portion 59 is provided.

When each clamp cylinder 57 is extended, the engaging portion 59 of each rod 58 is connected to the connecting collar 31 and the supporting arm 47.
It is in a position where it can engage with the locking member 55 of the tool head 6 placed above, and by contracting the clamp cylinder 57 with the engaging portion 59 engaged with the locking member 55, the tool head 6 is pulled upwards.

A plurality of, for example, four, positioning pins 60 are erected on the upper surface of the tool head 6, and four fitting cylinders 61 into which each of the positioning pins 60 can be fitted are fixed to the lower surface of the lifting table 12. When the tool head 6 is pulled up by the clamp cylinder 57, each positioning pin 60 is fitted into the fitting tube 61, thereby positioning the tool head 6.

Moreover, the outer surface of the positioning pin 60 is provided with a stepped portion facing upward, and when the tool head 6 is pulled up by the clamp cylinder 57, the stepped portion comes into contact with the lower surface of the fitting cylinder 61, thereby preventing further lifting operation. Along with being
A tool head 6 is fixed to a lifting platform 12.

On the other hand, at the lower end of the rotating shaft 54 in the tool head 6,
The upper end of the boring bar 7 is detachably connected via the universal joint 62. Therefore, the boring bar 7 is suspended from the tool head 6 so as to be swingable in any direction through 360 degrees within a horizontal plane. A cutting tool 63 is fixedly installed on one side of the boring bar 7 in a manner corresponding to the spacing between the respective bearing holes 11 in the workpiece W to be bored.

In FIGS. 6 and 7, at the bottom of the column 3, four supporting jigs 8 for slidably and rotatably supporting boring bars 7 of different types are arranged at 90 degrees each around the column 3. placed at intervals. These support jigs 8 are supported by a cylindrical jig carrier 64 surrounding the support column 3, and by angularly displacing the jig carrier 64 around the vertical axis, a desired support jig 8 can be moved to the processing station. It can be brought to S.

The lower outer surface of the pillar 3 has a cross section that opens downward.
A U-shaped upper guide rail 65 is fixed along an imaginary circumference centered on the center position of the support 3, and a cross section that opens upward is provided below at a distance from the upper guide rail 65. A lower guide rail 66, which has a U-shaped surface and extends along an imaginary circumference corresponding to the upper guide rail 65, is fixed.

The jig carrier 64 is arranged between the upper and lower guide rails 65 and 66, and on the upper part of the jig carrier 64, a plurality of rollers 67 rolling on the upper guide rail 65 are arranged with axes spaced apart from each other. A plurality of rollers 68 are rotatably supported at the lower part of the jig carrier 64 and rotate within the lower guide rail 66 with a space between them, and roll on the outer upper edge of the lower guide rail 66. A plurality of rollers 141 are pivotally supported with intervals between them. Therefore, the jig carrier 64 is
It is rotatable about a vertical axis guided by lower guide rails 65,66.

In order to rotate the jig carrier 64, an indexing mechanism 69 is arranged at the bottom of the column 3.

This index mechanism 69 has an index moke 70
and a gear box 71 containing a gear train (not shown) for decelerating and transmitting the driving force of the index motor 70;
The driving force from the driving gear 72 and the gear box 71 is transferred to the driving gear 7.
and a gear train 73 for transmitting data to gear box 71
is fixed to the lower part of the support column 3, and the index mask 70 is fixed to the lower part of the gear box 71.

On the other hand, an internal gear 74 is fixed to the lower part of the jig carrier 64, and the drive gear 72 meshes with the internal gear 74.

Therefore, when the index motor 70 is operated, the drive gear 72 causes the internal gear 74, that is, the jig carrier 64
is driven to rotate.

The support jig 8 basically includes a rectangular jig main body 75, two bearing parts 76.77 integrally provided at both upper and lower ends of the jig main body 75, and these bearing parts 76.77. A bearing member 82 is attached to the jig main body 75 in between.

8, 9 and 10, a basically cylindrical support member 80 having a support hole 78 extending in the vertical direction is fixed to the upper bearing portion 76. As shown in FIGS. On the other hand, a support cylinder 145 that is removably inserted and supported by a support member 80 is attached to the upper part of the boring bar 7 via a bearing 150.

The external cross-sectional shape of the support cylinder 145 is basically a regular polygon, for example, a regular dodecagon, and arcuate sliding surfaces 146 are provided at the vertices of each of the supports, as shown in FIG. 8A. In other words, the outer surface of the support tube 145 has a shape in which a plurality of sliding surfaces 146, which are formed in an arc shape with a very small center angle range and are arranged at equal intervals in the circumferential direction, are interconnected by a flat surface 147. .

On the other hand, the support hole 78 of the support member 80 is basically formed in a circular shape with an inner diameter corresponding to the outer shape of the arcuate sliding surface 146. A number of relief grooves 148 extending in the axial direction correspond to the number of surfaces 146.
are provided at equal intervals in the circumferential direction.

The support cylinder 145 is inserted into the support hole 78 of the support member 80 when the boring bar 7 moves forward or descends, and when the insertion starts, the sliding surface 14 of the support cylinder 145
6 is a relief groove 148 as shown in FIGS. 8 and 8A.
The sliding surface 146 is at a position corresponding to the inner surface of the support hole 78 due to the angular displacement due to the action of the guide mechanism 149 while descending by a certain distance x1 from the start of insertion, as shown in FIGS. 9 and 9A. Sliding contact.

The guide mechanism 149 includes a pin 151 protruding from the outer surface of the support tube 145, and a guide groove 152 provided on the inner surface of the support hole 78 to slidably fit and guide the pin 151. .

The pin 151 is provided to protrude outward from one of the flat surfaces 147 on the lower outer surface of the support cylinder 145 .

On the other hand, the guide groove 152 is provided over the entire length of the support hole 78, and consists of a first straight part 153, an inclined part 154, and a second straight part 155, which are successively connected from the upper end thereof. The first straight portion 153 is provided over a relatively short distance 12 along the axial direction of the support hole 78 between the two escape grooves 148 , 148 .

Further, the inclined portion 154 is provided over a distance D1112) from the lower end of the first straight portion 153, and is provided so as to be inclined toward one of the escape grooves 14B as it goes downward. Furthermore, the second straight portion 155 is provided to overlap one relief groove 148 .

According to this guide mechanism 149, the pin 151 is guided by the inclined portion 154 while the support tube 145 is inserted into the support hole 78 with each sliding surface 146 corresponding to the relief groove 148 and then lowered by a distance 11. two relief grooves 1 depending on
48,148 by 1/2 of the central angle, and the ninth
The state shown in FIG. 9 and FIG. 9A is obtained. This state is the starting position for machining the workpiece W by the boring bar 7, and the pin 15
1 descends along the second straight portion 155 and the machining is completed when it reaches the position P indicated by diagonal lines in FIG. 1O.

By the way, each sliding surface 146 needs to be in a position corresponding to each escape groove 148 when the support tube 145 starts to be inserted into the support hole 78, but in order to maintain that position, the tool head 6
For example, a pair of torsion bars 156 are provided between the support tube 145 and the support tube 145 . These torsion bars 15
According to No. 6, when the support cylinder 145 rises and comes out of the support hole 78, each contacting surface 146 returns to the position corresponding to each escape groove 148.

11 to 14, the bearing member 82 is the bolt 1
The bearing member 82 has a through hole 161 coaxial with the support hole 78.
A cylindrical inner sleeve 1 having a support hole 83 through which the bolt 7 can be inserted is provided in the through hole 161.
62 is press-fitted.

Three annular grooves 163, 164, 165 are provided on the inner surface of the through hole 161 at intervals from the bottom, and a guide hole 166.
167 and 168 are bored in the bearing member 82. In addition, each guide hole 166, 167° 168 has an oil supply pipe 1 for guiding cutting oil.
69.170171 is connected.

Each bite 6 of the boring bar 7 is provided on the inner surface of the support hole 83.
A passage 172 is provided along the entire length in the axial direction.

The passage 172 is provided on the inner surface of the support hole 83 in the inner sleeve 162 at a position corresponding to the lowermost annular groove 163.
A recess 173 formed in a crescent shape in cross section is provided at a position different from the recess 173 that becomes shallower toward both sides in the circumferential direction, and the recess 173 connects the recess 173 and the annular groove 163.
4 is bored in the inner sleeve 162.

Further, an oil supply passage 175 connecting the annular groove 164 and the passage 172 is provided in the inner sleeve 162 at a position corresponding to the annular groove 164 in the intermediate portion. In a portion corresponding to the oil supply passage 175, the front side of the passage 172 along the rotation direction 176 of the boring bar 7 is cut out in the rotation direction 176, and a cutout part 177 is formed which becomes shallower as it goes in the rotation direction 176. be done.

Furthermore, a recess 1 having the same shape as the recess 173 is provided on the inner surface of the support hole 83 at a position corresponding to the uppermost annular groove 165 and at a position different from the passage 172 and the recess 174.
78 is provided, and an oil supply passage 179 connecting the recess 178 and the annular groove 165 is bored in the inner sleeve 162.

In this way, the cutting oil supplied from each oil supply pipe 169, 170, 171 is guided to the recess 173, 178, passage 172 and notch 177, and as the boring bar 7 rotates, the cutting oil is The boring bar 7 is supported by the inner sleeve 162 via the cutting oil.

In FIGS. 15 and 16, the lowermost bearing portion 77
is provided with a through hole 180 coaxial with the bearing member 82, and a basically cylindrical rotary cylinder 81 is rotatably supported in the through hole 180 via a bearing 181. The tip or lower end of the boring bar 7 is removably inserted into the rotary cylinder 81, and a positioning mechanism 182 is provided to accurately position the boring bar 7 within the rotary cylinder 81. Boring bar 7 and rotary cylinder 8
It is set between 1 and 2.

The positioning mechanism 182 is biased to elastically slide into a groove 184 provided along the axial direction on the inner surface of the support hole 79 that the rotary cylinder 81 has over its entire length, and to the bottom of the support hole 184, so that the boring bar 7, or a pressing piece 185 supported at the lower end.

A basically cylindrical support member 186 is fixed to the lower end of the boring bar 7 by a bolt 187 and a key 188. An extending slit 189 is provided.

The pressing piece 185 is slidably engaged with the sling l-189, and is rotatably supported at the lower end of the support member 186 by a support shaft 190 perpendicular to the axis of the boring bar 7. Moreover, the supporting member 1 is located on the opposite side of the slit 187 with respect to the axis.
A spring 191 is compressed between the inner surface of 86 and the pressing piece 185, and the spring force of this spring 191 causes the pressing piece 185 to spring in a direction in which one end of the pressing piece 185 projects outward from the slit 189. energized. Further, on the outer surface of one end side of the pressing piece 185, a flat pressing surface 19 that can slide into contact with the bottom of the groove 184 is provided.
2 is provided. Furthermore, a relatively short regulating slit 194 is provided at the lower end of the support member 186 on the opposite side to the slit 189, forming a regulating surface 193 facing downward. It has an abutment surface 195 that can be abutted and is slidably engaged with the regulation slit 194 . Therefore, the amount of protrusion of the pressing piece 185 from the sulin l-189 is regulated by the time the contact surface 195 contacts the restriction surface 194.

According to such a positioning mechanism 182, when the boring bar 7 is inserted into the rotary cylinder 81, the pressing surface 192 of the pressing piece 185 comes into elastic contact with the bottom of the groove 184.
The boring bar 7 is pressed in the direction away from the groove 184, and the boring bar 7 is always brought into close contact with the inner surface of the support hole 79 on the side opposite to the groove 184.
The axis position within the rotary cylinder 81 is always maintained constant.

Such a support jig 8 is supported by the jig carrier 64 such that it can approach the jig carrier 64 and move away from the jig carrier 64 within a regulated range.

That is, on the jig main body 75 of the support jig 8, a pair of upper support protrusions 84 and a pair of lower support protrusions 85 are provided on each of the bearing parts 7.
6.Protrudes on the opposite side from 77.

Stoppers 86 and 87 bent downward are provided at the tips of these upper and lower support protrusions 84 and 85, respectively. On the other hand, on the jig carrier 64, a pair of ball holding cylinders 88 corresponding to the rain support protrusions 84 and a pair of ball holding cylinders 88 corresponding to the rain support protrusions 85 are provided at positions spaced apart by 90 degrees in the circumferential direction. A pair of ball holding cylinders 89 are provided. Each holding cylinder 88, 89 has an axis parallel to one diameter line of the jig carrier 64, and is fixed through the jig carrier 64, and the upper part of the protruding end of each holding cylinder 88, 89 has an axis parallel to one diameter line of the jig carrier 64. , upwardly protruding protrusions 90 and 91 for placing the lower surfaces of the lower support protrusions 84 and 85, respectively, are provided in a protruding manner. Further, from the protruding ends of both holding cylinders 88 and 89, a pressing pin 9 is inserted.
2.93 respectively protrude, and these pressing pins 9
2.93 are biased in the projecting direction by springs 94.95 housed within each holding cylinder 88.89.

According to this structure, the upper and lower support protrusions 84 of the support jig 8
, 85 are placed on the protrusions 90.91 on the jig carrier 64 side, the support jig 8 is pressed by the pressing pins 92.93, and each stopper 86.87 comes into contact with the protrusion 90.91. It is supported by the jig carrier 64 in this state. When the support jig 8 is brought to the position of the processing station S in this state, the axes of the support holes 78, 83, 79 in the support jig 8 are located outward from the axis of the boring bar 7 above them. Therefore, during boring, it is necessary to move the support jig 8 close to the jig carrier 64 and fix it there.

Therefore, at the position corresponding to processing station S,
A jig clamping cylinder 96 corresponding to the upper part of the jig main body 75 and a jig clamping cylinder 97 corresponding to the lower part of the jig main body 75 are disposed on the sides of the jig main body 75 . Rods 98.99 of these jig clamping cylinders 996.97 extend outward along one diameter line of the jig carrier 64, and the ends of the rods 98.99 are connected to the clamping member 100,
101. In addition, each clamp member 100
．． 101 is supported by the support column 3 with its midway as a fulcrum, and rotates around the horizontal axis in response to the expansion and contraction operations of the jig clamp cylinders 96 and 97.

On the other hand, the jig main body 75 of the support jig 8 is provided with a protruding locking protrusion 102 bent in an L shape so that the other end of the upper clamp member 100 can be engaged with, and An L-shaped locking protrusion 103 is integrally provided to engage the other end of the member 101.

Also, on the side of the support column 3 facing the processing station S, there are four knock pins 10 having a regulating step 104 facing outward.
5 are provided protrudingly, and four positioning holes 106 are bored in the jig main body 75 corresponding to the knock bottles 105.

In the part corresponding to the processing station S, extending between the lower part of the support column 3 and the lower part of the lifting platform 12 of the drive mechanism 4,
A bellows-shaped cover 107 is provided to cover the threaded rod 15. Therefore, the threaded rods 15 are always layered regardless of the movement of the drive mechanism 4 up and down.

The conveyance mechanism 10 includes a pallet guide rail 11 arranged horizontally on the opposite side of the support column 3 with respect to the processing station S.
The pallet 111 is guided by a guide rail 110 with a workpiece W supported and fixed thereon.

The pallet guide rail 110 includes an upper guide portion 114 having a plurality of guide rollers 113 arranged between a pair of guide plates 112 facing each other, and a pair of guide plates 1 facing each other.
15 and a lower guide part 117 formed by disposing a plurality of guide rollers 116 between them, and are connected by a connecting member 118, and are arranged horizontally except for the part corresponding to the processing station S. .

The pallet 111 has a flat plate shape and is guided by the upper and lower guide parts 114 and 117 of the pallet guide rail 110 and transported to a position corresponding to the processing station S.
It is carried out from the processing station S. This palette 11
1 includes a plurality of positioning pins 11 that are fitted into the workpiece W.
9, upper and lower clamp members 120 and 121 for engaging and fixing the work W, and an abutment pin 122 that abuts the work W. By fitting the positioning pin 119 to the workpiece W and abutting the workpiece W to the abutment pin 122, and fitting the clamp members 120, 121 to the workpiece W, the workpiece W is aligned with the bearing hole 11 vertically. It is fixed to the throat 111.

The workpiece support mechanism 9 is disposed at a portion corresponding to the processing station S on the opposite side to the support column 3. The workpiece support mechanism 9 includes a movable table 125 that is movable in a horizontal direction perpendicular to the transport mechanism 10, a pressing cylinder 126 for horizontally driving the movable table 125, and a press cylinder 126 that abuts the movable table 125 and presses the movable table 125.
a stop position switching cylinder 127 that regulates the horizontal movement of 5 in two stages, and a reversing motor 128 fixed to the moving table 125.
and a pallet holding frame 130 fixed to the tip of the output shaft 129 of the reversing motor 128.

The moving table 125 is movable along a pair of guide rods 131 fixed on the base 2 in a horizontal direction perpendicular to the transport mechanism 10.
Twenty-six rods 132 are connected. Pressing cylinder 126
is fixed to the end of the base 2 on the opposite side of the support column 3 with respect to the processing station S, and by operating the press cylinder 126 to expand and contract, the direction in which the movable table 125 approaches the processing station S and the direction of the processing station Move in the direction away from S.

The stop position switching cylinder 127 is disposed facing the moving table 125 in a portion near the processing station S, and switches the stopping position of the moving table 125 between a state in which the rod 133 is extended and a state in which it is contracted. be able to. That is, when the movable base 125 is brought into contact with the rod 133 in the extended state, and when the movable base 125 is brought into contact with the rod 133 in the contracted state.
The stop position of the movable table 125 changes depending on when the movable table 125 is brought into contact with the movable table 125.

The output shaft 129 of the reversing motor 128 rotatably passes through the moving table 125 and protrudes toward the processing station S.
A pallet holding frame 130 is fixed to the tip of this output shaft 129. The pallet holding frame 130 is basically formed into a flat plate shape, and the upper and lower ends of the pallet holding frame 130 have the upper and lower ends of the transport mechanism 10,
Guide grooves 134, 13 corresponding to lower guide part l14.117
5 are provided respectively. Furthermore, the pallet holding frame 13
0 is provided with a pair of clamping cylinders 136 for fixing the pallet 111 by coming into contact with the pallet 111, and the clamping cylinders 136 are extended with the pallet 111 fitted into the guide grooves 134 and 135. As a result, the pallet 111 is supported and fixed to the pallet holding frame 130.

In this workpiece support mechanism 9, the workpiece W conveyed by the conveyance mechanism 10 can be moved to the processing station S in two stages and supported. That is, by extending the pressing cylinder 126 while the stop position switching cylinder 127 is extended, the workpiece W is moved in the direction opposite to the column 3, and the axis of the bearing hole 11 is slightly shifted from that of the boring bar 7. The workpiece W is then moved and fixed to a position where the axis of the receiving hole 11 coincides with the boring bar 7 by extending the pressing cylinder 126 while the stop position switching cylinder 127 is contracted. I can do it.

In order to guide the movement of the workpiece W when moving the axis of the bearing hole 11 to a position where the boring bar 7 is moved, a pair of guide posts 138 having a fitting hole 137 at the tip are provided on the support column 3 side of the pallet 111. It will be protruded towards. - The jig main body 75 of the force support jig 8 includes a positioning pin 14 having a fitting protrusion 139 at its tip that can be fitted into the fitting hole 137.
0 is set protrudingly. Further, a plurality of positioning holes 142 are bored in the surface of the work W held on the pallet 111 facing the support jig 8, and the jig body 75 of the support jig 8 is provided with a plurality of positioning holes 142. A plurality of fitting positioning pins 143 are provided in a protruding manner.

Next, the operation of this embodiment will be described. The workpiece W is transported to a position corresponding to the processing station S by the transport mechanism 10. As a result, the pallet 111 supporting the workpiece W is moved through both guide grooves 13 of the pallet holding frame 130.
4,135 fits. By extending the clamp cylinder 136 in this state, the pallet 111 is fixed to the pallet holding frame 130. Next, while keeping the stop position switching cylinder 127 in the extended state, the pressing cylinder 1 is
26 is extended, the moving table 125 moves until it comes into contact with the rod 133 of the stop position switching cylinder 127, so that the axis of the bearing hole 11 of the workpiece W is on the opposite side of the support column 3 from directly below the boring bar 7. Move to a slightly different position.

With the work W being moved in this way, by operating the feed motor 16 of the feed mechanism 5, the threaded rod 15
is rotated to lower the drive mechanism 4, tool head 6, and boring bar 7.

At this time, the axis of the bearing hole 11 of the workpiece W is slightly deviated from the boring bar 7 by several degrees, and the boring bar 7
is stationary in a fixed position with each tool 63 facing the direction opposite to the column 3, so each tool 63 is aligned with the bearing hole 11.
The boring bar 7 can be inserted into the bearing hole 11 without interfering with the bearing hole 11.

During this descent, the boring bar 7 is inserted concentrically into the support holes 78, 83, and 79 of the support jig 8, but when the support cylinder 145 attached to the top of the boring bar 7 is inserted into the support hole 78, It is inserted into the support hole 7th with slight angular displacement due to the action of the guide mechanism 149. That is, the support cylinder 145 starts to be inserted into the support hole 78 with its sliding surface 146 corresponding to the relief groove 148. In this state, a gap is created between the support tube 145 and the support hole 78, as shown in FIGS. 8 and 8A, so that insertion is extremely easy and chips and cutting oil are removed from the support tube 145.
5 and support hole 78, it is sufficiently discharged from the gap and no galling occurs.

Also, the distance of the support cylinder 145 from the start of insertion is 7! When the sliding surface 146 has descended by the amount (3), the sliding surface 146 is in sliding contact with the inner surface of the support hole 78 as shown in FIGS. 9 and 9A, and in this state, the support tube 145 is supported concentrically by the support hole 78. It turns out.

On the other hand, when the lower end of the boring bar 7 is inserted into the support hole 79, the pressing piece 185 slides into the groove 184, and the positioning mechanism 182 including the pressing piece 185 causes the lower end of the boring bar 7 to move in the opposite direction from the groove 184. Support hole 79 on the side
It descends closely to the inner surface of the Therefore, even though the inner diameter of the support hole 79 is set to be slightly larger than the outer diameter of the boring bar 7, including the allowable tolerance, in order to insert and remove the polling half, the shaft of the lower end of the boring bar 7 is The core is always at the same position with respect to the support hole 79.

When the support tube 145 is slightly angularly displaced and held concentrically in the support hole 78, that is, when the pin 151 of the support tube 145 reaches the upper end of the second straight portion 155 in the guide groove 152, the boring bar 7 Each cutting tool 63 is located above the corresponding bearing hole 11 as shown in FIG. 17, and in this state, the axis of each bearing hole 11 remains offset from the axis of the boring bar 7.

Next, the stop position switching cylinder 127 is contracted and the pressing cylinder 126 is extended again. As a result, the movable table 125 is moved to the stop position switching cylinder 12.
The pallet (11) fixed to the pallet holding frame 130 can be moved forward by the amount that the rod 133 of (7) contracts.
The workpiece W supported by the support column 3 moves several liters to the side of the support column 3. Therefore, the axis of the bearing hole 11 in the workpiece W is
As shown in FIG. 8, it coincides with the axis of the boring bar 7.

Moreover, at this time, the positioning pins 143 of the support jig 8 are
It fits into the positioning hole 142 of the workpiece W, and the workpiece W is positioned.

Thereafter, the boring bar 7 is rotated by the drive mechanism 4 and lowered by the feed mechanism 5, whereby the bearing hole 11 is bored by each cutting tool 63.

During this boring process, the bearing member 82 in the support jig 8
Cutting oil is supplied between the inner sleeve 162 press-fitted into the hole and the boring bar 7, so that even if the boring bar 7 is rotated at high speed, seizure will not occur, and the axis of the boring bar 7 can be raised to a high level. High-precision boring can be performed while maintaining accuracy.

In addition, since the boring bar 7 is suspended so as to be able to swing in any direction, even if the axis of the bearing hole 11 in the work W in the processing station S is not completely vertical, the deviation is absorbed. This allows for accurate boring.

When the boring process is completed, the stop position switching cylinder 127
starts to extend again. As a result, the movable table 125 moves back several sets in the direction away from the support column 3, and the axis of the bearing hole 11 becomes eccentric from the axis of the boring bar 7. In this state, the boring bar 7 is raised, but at this time, each bite 6
3 does not come into contact with the bearing hole 11, so no scratches such as cutter marks are left in the bearing hole 11. Thereafter, the press cylinder 126 is contracted to remove the pallet holding frame 111.
is moved back to the position of the transport mechanism IO, and the clamping cylinder 136 is further retracted to release the clamp state of the pallet 111 from the pallet holding frame 130, and then the pallet 111 is carried out from the processing station S by the transport mechanism 10. .

In this way, the boring process of the workpiece W is completed, but when the type of the workpiece W changes, the corresponding boring bar 7 and support jig 8 are moved to the corresponding position in the machining station S according to the change in type. can be placed at any time.

That is, by operating the index moke 43 of the index mechanism 42, the tool head 6 supporting the desired boring bar 7 is moved to a position corresponding to the processing station S, and the clamp cylinder 57 moves the tool head 6 to the island section. It can be fixed to the moving mechanism 4. Also, the index mode 7 of the index mechanism 69
0, the desired supporting jig 8 is moved to a position corresponding to the processing station S, and the supporting jig 8 is fixed to the processing station S by operating the jig clamp cylinders 96 and 97. can be placed. Therefore, the boring bar 7 and the support jig 8 can be changed according to changes in the type of work W, and it is possible to cope with high-mix low-volume production.

In the workpiece support mechanism 9, the reversing motor 128 is provided for reversing the workpiece W for slicing the end face of the workpiece W in addition to boring. It is not necessary when performing only

C1 Effects of the Invention As described above, the device of the present invention is basically formed into a cylindrical outer shape that is a regular polygon and has an arcuate sliding surface at each vertex, and is rotatable in a rod-like manner through an i-shaped support. A support tube attached to the processing tool; basically, the support tube is arranged at a fixed position so that the support tube can be inserted and removed in accordance with the axial movement of the rod-shaped rotary processing tool, and has an inner diameter corresponding to the sliding surface. a support member having a circular support hole, and on the inner surface of the support hole, relief grooves extending in the axial direction, the same number as the sliding contact surface, are provided at equal intervals in the circumferential direction; the support cylinder starts to be inserted into the support member; and a guide mechanism for angularly displacing the support tube so that the sliding surface corresponding to each relief groove slides into contact with the inner surface of the support hole while the support tube moves forward a certain distance from the support hole. When inserting, a gap is created between them to facilitate insertion, and to allow chips etc. to be discharged to prevent galling, and to ensure that sliding contact occurs after a certain distance has been advanced. It is also possible to maintain high accuracy of the axis by making the surface slide into contact with the inner surface of the support hole, and also to discharge chips etc. from the relief groove.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is an overall perspective view of a boring machine to which the invention is applied, FIG. 2 is an overall vertical sectional view, and FIG. -m-line enlarged sectional view,
Fig. 4 is an enlarged sectional view taken along the line IV-TV in Fig. 2, Fig. 5 is an enlarged longitudinal sectional view of the main part after boring is completed, Fig. 6 is an enlarged sectional view taken along the line Vl-VT in Fig. 2, Fig. 7 is a view taken along line ■-■ in Fig. 2, Fig. 8 is a sectional view taken along line -■ in Fig. 5 at the start of insertion, and Fig. 8A is an enlarged view of section ■A in Fig. 8. Figure 9 is a sectional view taken along the line IX-IX in Figure 5, Figure 9A is an enlarged view of the IXA section in Figure 9, and Figure 10 is a cross-sectional view taken along the line X-X in Figure 8 with the boring bar omitted. Figures and mtt diagrams are enlarged sectional views taken along the □ XI-XI line in Figure 5, and Figures 1:2 and 2 are
13 is an enlarged sectional view taken along the xm-xm line of FIG. 5, FIG. 14 is an enlarged sectional view taken along the line XIV-XIV of FIG. FIG. 16 is an enlarged vertical cross-sectional view of the main part showing the supporting state of the lower end of the boring bar, FIG. 16 is a cross-sectional view taken along the line XVI-XVI of FIG. 15, and FIG. FIG. 18 is an enlarged longitudinal sectional view of the main part corresponding to FIG. 17 when the axis of the boring bar and the axis of the bearing hole of the workpiece are aligned. 7... Boring bar as a rod-shaped rotary processing tool, 7
8... Support hole, 80... Support member, 145...
・Support tube, 146...Sliding surface, 148...Escape groove,
149...Guide mechanism, 150...Bearing frame Applicant Honda Motor Co., Ltd. Si:S1
Figure 6 Figure 13 Figure 11 R Figure 18 Figure 17 r4+

Claims (1)

[Claims] A positioning support device for a rod-shaped rotary machining tool capable of moving in the axial direction and rotating around the axis, which is basically formed into a cylindrical shape with an outer shape of a regular polygon and having an arcuate sliding surface at each vertex, a support cylinder attached to the rod-shaped rotary machining tool via a bearing; disposed at a fixed position so that the support cylinder can be inserted and removed in accordance with the axial movement of the rod-shaped rotary machining tool, and corresponds to the sliding surface; a support member having a basically circular support hole having an inner diameter of about 100 to 100 mm, and on the inner surface of the support hole, relief grooves extending in the axial direction and having the same number as the sliding surface are provided at equal intervals in the circumferential direction; a guide mechanism for angularly displacing the support tube so that the sliding surface corresponding to each escape groove slides into contact with the inner surface of the support hole while the support tube advances a certain distance from the start of insertion into the support member; A positioning support device for rod-shaped rotary machining tools.