TW201500134A - Rotation balance cutting boring tool - Google Patents

Abstract

Disclosed is a rotation balance cutting boring tool, which particularly comprises a counterweight block, a synchronous bidirectional displacement mechanism, and a slide block respectively arranged at a lower portion, a middle portion, and an upper portion of a borer. The counterweight block and the slide block are arranged in parallel, while the synchronous bidirectional displacement mechanism is arranged to be perpendicular thereto. The synchronous bidirectional displacement mechanism comprises a lead screw having a section of positive thread and a section of reverse thread for locking a positive threaded nut and a reverse threaded nut respectively. The positive threaded nut and the counterweight block are respectively provided with a protrusion block and a groove that correspond to each other and are inclined. The reverse threaded nut and the slide block are respectively provided with a protrusion block and a groove that correspond to each other and are inclined. To operate, rotate a dial plate to drive the lead screw for rotating the positive threaded nut and the reverse threaded nut, so that the counterweight block and the slide block can approach each other or move away from each other so as to achieve balance in weight.

Description

Rotary balance cutting boring tool

The invention relates to a rotary balance cutting boring tool, which is mainly applied to a high-speed cutting technology capable of maintaining a balance between a boring tool and a high-speed cutting operation.

According to the invention publication of the invention patent application No. 20060623, the boring tool is provided with a cutter body on which an adjustable tool holder is mounted. The hole cutter is further provided with a rotatable adjusting member, by means of which the tool holder can be moved radially by a driving mechanism for adjusting the diameter of the bore, the driving mechanism converting the rotation of the adjusting member into the translation of the tool holder; At the same time, in order to balance the boring head, the counterweight is moved to the left or right by rotating the dial, the counterweight does not rotate and moves only in the longitudinal direction of the hole, thereby setting the pupil diameter and the compensation for the imbalance independently of each other. .

However, in the above-mentioned "boring tool" invention patent application, the unbalance compensation technology disclosed, after the tool holder is moved to the left side to the pupil diameter, the weight must be moved to the right in the opposite direction, in order to Balance compensation, must be transferred twice, can not synchronously transfer the tool holder and counterweight; operation, it seems more troublesome and inconvenient, for its existing problems and lack of solutions to be overcome.

The inventor is currently engaged in the manufacture and design of related products, and has accumulated many years of practice. Experience and experience, in response to the existing problems and lacks of traditional high-speed rotary cutting boring tools, actively investing in the spirit of innovation and improvement, the completed rotary balance cutting boring tool.

The technical means for solving the problem and the effect of the prior art are as follows: a hole for accommodating and accommodating a groove arranged in parallel in the lower portion of the body of the boring device, the accommodating hole for accommodating a weight The accommodating groove is configured to receive a slider, and the accommodating body is provided with a receiving slot perpendicular to the accommodating hole and the accommodating groove, and the accommodating slot is adapted to receive a synchronous bidirectional displacement mechanism, wherein the synchronous bidirectional displacement mechanism is provided with a disc spring and a lead screw in the receiving slot, the lead screw is provided with a rotating screw and a reverse screw, the rotating screw And the counter-rotating screw can be locked with a positive-rotating nut and a counter-rotating nut, and the corresponding rotating nut and the weighting block are provided with a corresponding convex and grooved groove, the reverse snail A corresponding convex and grooved bump and groove are arranged between the cap and the sliding block, so that the positive-rotating nut and the counter-rotating nut can be combined with the groove of the weight and the slider by the convex block; Rotating the scale dial can synchronously drive the weights of the positive and reverse nuts on the lead screw and the sliders close to each other or Stay out phase, in order to balance the weight, so boring tool in high-speed rotary cutting, will not increase or decrease the size of the aperture boring and out of balance, with enhance the effectiveness and reach of which the main purpose.

1‧‧‧Knife

2‧‧‧ screwdriver tool

10‧‧‧Drilling body

11‧‧‧ accommodated perforation

12‧‧‧ accommodating grooves

121‧‧‧Perforation

122‧‧‧ screw holes

13‧‧‧ accommodating slots

14‧‧‧ Combined shaft

141‧‧‧Combination hole

15‧‧‧ step

16‧‧‧ Pin hole

17‧‧‧ fine-tuning alignment

18‧‧‧ center alignment

20‧‧‧weights

21‧‧‧ trench

22‧‧‧ screw holes

30‧‧‧ Slider

31‧‧‧ long hole

32‧‧‧ trench

33‧‧‧Parallel teeth

34‧‧‧ fine-tuning scale

35‧‧‧ coarse alignment

36‧‧‧ screw holes

40‧‧‧ knife holder

41‧‧‧Parallel teeth

42‧‧‧ coarse adjustment scale

43‧‧‧through hole

44‧‧‧blade

45‧‧‧Oval groove

50‧‧‧Synchronous two-way displacement mechanism

51‧‧‧ lead screw

511‧‧‧ Orthodontic teeth

512‧‧‧Reverse thread

52‧‧‧Ring nut

521‧‧‧Bumps

53‧‧‧Reverse Nuts

531‧‧‧Bumps

54‧‧‧Dicking turntable

541‧‧‧ beads

542‧‧‧ scale

543‧‧‧ hexagonal hole

60‧‧‧Head screw

P1‧‧‧slider screw

P2‧‧‧ knife seat screw

P3‧‧‧ blade screw

Q‧‧‧Latch

R‧‧‧ balls

S‧‧‧ disc spring

The first figure is a schematic view of a three-dimensional combination of the first embodiment of the present invention.

The second drawing is a perspective exploded view of the first embodiment of the present invention.

The third figure is a schematic perspective view of the first embodiment of the present invention when the pupil aperture is increased.

The fourth figure is a schematic plan view of the first embodiment of the present invention when the pupil aperture is increased.

Fig. 5 is a schematic cross-sectional view showing the increase of the pupil aperture in the first embodiment of the present invention.

Fig. 6 is a schematic view showing the pupil of the first embodiment of the present invention when the pupil aperture is increased.

Figure 7 is a plan view showing the reduction of the pupil diameter in the first embodiment of the present invention.

Eighth: FIG. 1 is a schematic cross-sectional view showing a cross section of the pupil aperture and a D-D cross section thereof.

Figure 9 is a perspective view of a three-dimensional combination of the second embodiment of the present invention.

Figure 10 is a perspective exploded view of the second embodiment of the present invention.

Eleventh drawing is a schematic view of a side view sectional combination of the second embodiment of the present invention.

Twelfth figure: is a schematic view of the B-B section of the eleventh figure.

Thirteenth Figure: is a schematic view of the B'-B' section of the eleventh figure.

Figure 14 is a schematic view showing the combination of the front view of the second embodiment of the present invention.

Figure 15: Schematic diagram of the K-K section in Figure 14.

Figure 16 is a perspective view showing the second embodiment of the present invention when the pupil aperture is increased.

Figure 17 is a schematic view showing the pupil of the second embodiment of the present invention when the pupil aperture is increased.

Figure 18 is a cross-sectional view showing a section of the second embodiment of the present invention for reducing the pupil diameter and its F-F profile.

Figure 19 is a perspective view showing the second embodiment of the present invention when the pupil aperture and a counterweight screw are added.

Fig. 20 is a schematic view showing the pupil of the second embodiment of the present invention when the pupil aperture and a counterweight screw are added.

Figure 21 is a perspective view showing the second embodiment of the present invention when the pupil aperture and the two weight screws are added.

Twenty-second diagram: showing the pupil hole when the pupil aperture and the two weight screws are increased according to the second embodiment of the present invention intention.

In order to make it easier for those skilled in the art to understand the art to understand the structure and production method of the present invention and the functional benefits that can be achieved, a specific embodiment will be listed and described in detail with reference to the following: a rotary balance For the cutting of the boring tool, please refer to the first and second figures: a schematic view of the three-dimensional combination and the three-dimensional decomposition of the first embodiment of the present invention. The utility model is mainly composed of a boring body 10, a weight 20, a slider 30, a knife seat 40 and a synchronous bidirectional displacement mechanism 50. The bottom of the boring body 10 is provided with a through-hole. The accommodating recess 11 is configured to receive a weight 20. The accommodating body 10 is provided with a receiving recess 12 extending through the accommodating opening 11 . The slot 12 is configured to receive a slider 30. A through hole 121 and a screw hole 122 are formed in the middle of the wall surfaces of the receiving recess 12, and the through hole 121 can be inserted through a sliding screw P1. A slidable slot 13 is disposed in the middle of the boring body 10, and a accommodating slot 13 is disposed in the middle of the boring body 10 and is disposed perpendicular to the accommodating hole 11 and the accommodating recess 12, The accommodating slot 13 is configured to receive a synchronous bidirectional displacement mechanism 50. The shaft center below the boring body 10 is provided with a coupling shaft 14 having a smaller outer diameter. The coupling shaft 14 is provided with two coupling holes 141 around the circumference. The coupling hole 141 is fixed to the shank 1 by the screw P, and the step 15 below the boring body 10 corresponds to the upper surface. A pin hole 16 is formed in the outer portion of the accommodating slot 13 , and the pin hole 16 is filled with a plurality of balls R, and the pin hole Q is inserted and closed to close the pin hole 16 . 10 in the middle of the upper end side A trimming alignment line 17 is provided, and a center alignment line 18 and positive and negative symbols (ten, one) are disposed in the middle of the receiving slot 13 of the potter body 10; the weight 20 is mounted on the above In the accommodating hole 11 of the boring body 10, a groove 21 having a slope corresponding to the synchronous bidirectional displacement mechanism 50 is disposed above the weight 20, and the groove 21 is combined with the synchronous bidirectional displacement mechanism 50; The slider 30 is disposed in the accommodating recess 12 of the boring body 10, and the slider 30 is provided with a long hole 31 corresponding to the through hole 121 and the screw hole 122 of the accommodating recess 12, and the long hole is provided. 31 is provided for a slider screw P1, and a groove 32 having a slope corresponding to the synchronous bidirectional displacement mechanism 50 is disposed under the slider 30, and the groove 32 is combined with the bidirectional displacement mechanism 50. A plurality of parallel teeth 33 are disposed, and the parallel teeth 33 are configured to receive a knife holder 40. One side of the slider 30 is provided with a set of fine-tuned scales 34 corresponding to the fine adjustment alignment line 17 of the pupil body 10. A coarse adjustment alignment line 35 is disposed at an intermediate portion of the upper side of the slider 30, and the slider 30 is provided with a screw hole in the middle of the parallel teeth 33. 36. The screw hole 36 can be locked by a tool holder screw P2 to fix a tool holder 40. The tool holder 40 is also provided with a plurality of parallel teeth 41 corresponding to the parallel teeth 33 of the slider 30, so that the tool holder 40 can be utilized. The parallel teeth 41 are slidably displaced in the parallel teeth 33 of the slider 30. The side of the blade holder 40 is provided with a set of coarsely sized scales 42 corresponding to the coarse alignment line 35 of the slider 30. There is a through hole 43 through which a blade screw P2 can be inserted and locked in the screw hole 36 of the slider 30, and a blade 44 is locked on the outside of the blade holder 40 by a blade screw P3; The displacement mechanism 50 is provided with a lead screw 51 in the accommodating slot 13 in the middle of the boring body 10, and the lead screw 51 is provided with a rotating screw 51. 1 and a pair of counter-screws 512, and a forward-rotating nut 52 and a counter-rotating nut 53 are respectively locked on the orbiting screw 511 and the counter-rotating screw 512 of the lead screw 51, and the counter-rotating nut 53 A groove 521 having a slope is disposed at a groove 21 corresponding to the weight portion 20 above the 52, and the forward screw nut 52 is coupled to the groove 21 of the weight 20 by the protrusion 521. The nut 53 is provided with a beveled protrusion 531 corresponding to the groove 32 of the slider 30, and the anti-rotation nut 53 is coupled with the groove 32 of the slider 30 by the protrusion 531. The lead screw 51 is coupled. A coil spring S is disposed at one end of the lead screw 51. The other end of the lead screw 51 is provided with a scale turntable 54. The circumference of the scale turntable 54 is provided with a bead groove 541 corresponding to the pin hole 16 of the baffle body 10, and the bead groove 541 is provided. The plurality of balls R can be filled to make the scale dial 54 more flexible and flexible. The scale dial 54 is circumferentially provided with a scale 542, which can be aligned with the center alignment line 18 of the potter body 10, The center of the scale dial 54 is provided with a hexagonal hole 543 for driving the screwdriver tool 2 to rotate. The scale 542 has twenty-five grids, and the scale dial 54 Each forward or reverse rotation, the positive-rotating nut 52 on the lead screw 51 and the counter-rotating nut 53 are synchronously close to or away from each other by 0.5 mm, that is, the displacement amount of each grid is 0.02 mm, when the positive-rotating nut When the slope of the projections 521 and 531 of the counter-rotating nut 53 is one to four, the displacement of the weight 20 and the slider 30 is 0.02 mm divided by 4 equal to 0.005 mm, that is, the outer diameter of the pupil is ±0.01 mm. By.

The present invention, which is a combination of the above various element structures, provides a rotary balance cutting boring tool, which is used in practical applications: please refer to the third, fourth, fifth and sixth figures: the implementation of the present invention Example 1 shows a schematic diagram of the three-dimensional, plane, section and pupil when the pupil aperture is increased. As shown in the seventh and eighth figures, the plane and the cross section and the D-D cross-section of the pupil aperture are reduced according to the embodiment of the present invention. use It is only necessary to first loosen the slider screw P1, and then insert the screwdriver tool 2 into the hexagonal hole 543 of the scale dial 54 to rotate forward or reverse according to the scale 542, so as to synchronously drive the positive-rotating nut 52 on the lead screw 51 and the reverse The screw caps 53 are close to each other or far away from each other, so as to obtain a balance of weight, and finally screw the slider screw P1, so that the boring tool does not increase or decrease the size of the boring hole when cutting at high speed. And lost balance.

A rotary balance cutting boring tool, as shown in the ninth and tenth drawings, is a schematic view of a three-dimensional combination and a three-dimensional exploded view of the second embodiment of the present invention. And the eleventh, twelfth, and thirteenth drawings are: a side view cross-section of the second embodiment of the present invention and a schematic cross-sectional view of B-B and B'-B'. And the fourteenth and fifteenth drawings are: a front view sectional combination and a K-K cross-sectional view of the second embodiment of the present invention. Mainly composed of a boring body 10, a weight 20, a slider 30, a knife seat 40, a synchronous bidirectional displacement mechanism 50 and a plurality of flange screws 60 of different weights; A venting through hole 11 is disposed under the ventilating body 10 , and the accommodating hole 11 is configured to receive a weight 20 . The boring body 10 is disposed above the venting body 11 and disposed parallel to the accommodating hole 11 . The accommodating recess 12 is configured to receive a slider 30. A through hole 121 and a screw hole 122 are defined in the middle of the wall surfaces of the accommodating recess 12, and the through hole 121 is provided with a slider. The screw hole P1 is disposed, and the screw hole 122 is configured to lock a slider 30 with a slider screw P1. The hole of the hole body 10 is not penetrated and is disposed with the receiving through hole 11 and the receiving groove 12 a vertically disposed accommodating slot 13 for accommodating a synchronous bidirectional displacement mechanism 50. The shaft below the boring body 10 is provided with a coupling shaft 14 having a smaller outer diameter. Two coupling holes 141 are defined in the circumference of the shaft 14 , and the coupling holes 141 are fastened to the shank 1 by the screw P. The step 15 below the boring body 10 corresponds to a pin hole 16 at the outside of the accommodating slot 13 , and the pin hole 16 can be used to fill a plurality of balls R and is inserted by the spigot Q. The insertion hole 16 is closed, and a fine adjustment alignment line 17 is disposed at an intermediate portion of the upper end surface of the boring device body 10. A center alignment line is disposed in the middle of the accommodating slot 13 of the boring machine body 10. 18 and positive and negative symbols (10, 1); the weight 20 is installed in the receiving through hole 11 of the above-mentioned hole body 10, and the upper portion of the weight 20 corresponds to the synchronous two-way displacement mechanism 50. a groove 21 having a slope, the groove 21 is combined with the synchronous bidirectional displacement mechanism 50, and a screw hole 22 is provided at the center of the outer end surface of the weight 20, and the screw hole 22 can be used for locking and fixing a weight screw The slider 30 is disposed in the accommodating recess 12 of the boring body 10, and the slider 30 is provided with a long hole 31 corresponding to the through hole 121 and the screw hole 122 of the accommodating recess 12, The long hole 31 can be penetrated by a slider screw P1, and a groove 32 having a slope corresponding to the synchronous bidirectional displacement mechanism 50 is disposed under the slider 30. The groove 32 is combined with the bidirectional displacement mechanism 50. The slider 30 is provided with a plurality of parallel teeth 33. The parallel teeth 33 can accommodate a tool holder 40. One side of the slider 30 corresponds to the hole body 10 The fine adjustment alignment line 17 is provided with a set of fine-tuned scales 34. A middle portion of the slider 30 is provided with a coarse alignment line 35. The slider 30 is provided with a screw hole 36 in the middle of the parallel teeth 33. The screw hole 36 can be locked by a tool holder screw P2 to fix a tool holder 40. The tool holder 40 is also provided with a plurality of parallel teeth 41 corresponding to the parallel teeth 33 of the slider 30, so that the tool holder 40 can be parallelized. The teeth 41 are slidably displaced at the parallel teeth 33 of the slider 30, the side of the holder 40 corresponding to the coarse alignment line 35 of the slider 30 described above. A set of coarsely sized scales 42 is provided, and an elliptical groove 45 is disposed in the middle of the tool holder 40. The elliptical groove 45 can be inserted into a screw hole 36 of the slider 30 and locked in the screw hole 36 of the slider 30. A blade 44 is locked on the outer side of the knife seat 40 by a blade screw P3. The elliptical groove 45 can increase the boring radius of the blade seat 40 by 4 mm; the synchronous bidirectional displacement mechanism 50 is intermediate the boring body 10 A lead screw 51 is disposed in the accommodating slot 13 , and the lead screw 51 is provided with a rotating screw 511 and a reverse screw 512 , and the rotating screw 511 and the counter snail of the lead screw 51 respectively The tooth 512 is provided with a positive-rotating nut 52 and a counter-rotating nut 53. A groove 521 having a slope is disposed at a groove 21 corresponding to the weight of the counterweight 20 above the counter-rotating nut 52. The positive-rotating nut 52 is combined with the groove 21 of the weight 20, and the reverse nut 53 is provided with a convex 531 having a slope corresponding to the groove 32 of the slider 30. The counter nut 53 is coupled to the groove 32 of the slider 30. The lead screw 51 is provided with a disc spring S at one end thereof, and a scale dial 54 is disposed at the other end of the lead screw 51. The circumference of the scale dial 54 corresponds to the pin hole 16 of the above-mentioned hole body 10, and a bead groove 541 is provided. The bead groove 541 can be filled with a plurality of balls R, so that the scale dial 54 can be more flexible and light when rotating. The scale dial 54 is circumferentially provided with a scale 542, which can be aligned with the center alignment line 18 of the above-mentioned pupil body 10, and the center of the scale dial 54 is provided with a hexagonal hole 543 for driving the screwdriver tool 2 Rotating, the scale 542 has twenty-five grids, and each time the scale dial 54 rotates or reverses one turn, the positive-rotating nut 52 on the lead screw 51 and the counter-rotating nut 53 are synchronously close to or away from each other by 0.5 mm, that is, The displacement amount of each grid is 0.02 mm. When the slopes of the projections 521 and 531 of the counter-rotating nut 52 and the counter-rotating nut 53 are one to four, the displacement of the weight 20 and the slider 30 is 0.02 mm. Divide by 4 equals 0.005mm, that is, the outer diameter of the pupil is ±0.01mm; the plurality of weight screws 60 have different weights, and according to the increase or decrease of the displacement of the knife seat 40, the heavier or lighter weight screw 60 is fixed and fixed. In the screw hole 22 of the above-mentioned weight 20, the balance of the weight when the blade 40 is moved outward is obtained.

The present invention, which is a combination of the above-described respective component structures, provides a rotary balance cutting boring tool, which is used in practical applications: please refer to the sixteenth and seventeenth drawings: Embodiment 2 of the present invention Schematic diagram of the three-dimensional and pupil directions when the pupil aperture is increased. FIG. 18 is a cross-sectional view showing a section of the second embodiment of the present invention for reducing the pupil diameter and a F-F cross section thereof. The user only needs to loosen the slider screw P1 first, and then insert the screwdriver tool 2 into the hexagonal hole 543 of the scale dial 54 to rotate or reverse according to the scale 542, so as to synchronously drive the positive-rotating nut 52 on the lead screw 51 and The counter-rotating nuts 53 are close to each other or far apart from each other, so as to obtain a balance of weight, and finally the slider screw P1 can be tightened, so that the boring tool does not increase or decrease the boring aperture when cutting at high speed. The size is out of balance.

Please refer to the nineteenth and twentyth aspects of the present invention: a schematic diagram of the three-dimensional and the pupil when the pupil aperture and a weight screw are added in the second embodiment of the present invention. And FIG. 21 and FIG. 22 are schematic diagrams showing the three-dimensional and pupil directions when the pupil aperture and the two weight screws are added in the second embodiment of the present invention. The user only needs to loosen the seat screw P2 first, so that the seat 40 can be slidably displaced by the parallel teeth 41 on the parallel teeth 33 of the slider 30, and the scale 42 is aligned with the coarse alignment line 35 of the slider 30. For each additional 1 mm, the heavier weight screw 60 should be replaced on the weight 20 to obtain a balance of weight. Finally, the seat screw P2 can be tightened, so that the boring tool can be cut at high speed. There is no loss of balance due to the increase or decrease in the pupil size.

In view of the above-mentioned invention, it is provided that a rotary balance cutting boring tool is confirmed by the inventors of the actual production and the repeated operation test, and it is confirmed that the functional benefits expected by the present invention can be achieved, and at the same time, The "first creation" that has not yet been seen has the "utility value of the industry". It is true that it has already met the requirements of the "practicality" and "progressiveness" of the invention patents, and applied for the invention patents in accordance with the provisions of the Patent Law. .

1‧‧‧Knife

10‧‧‧Drilling body

11‧‧‧ accommodated perforation

12‧‧‧ accommodating grooves

121‧‧‧Perforation

122‧‧‧ screw holes

13‧‧‧ accommodating slots

14‧‧‧ Combined shaft

141‧‧‧Combination hole

15‧‧‧ step

17‧‧‧ fine-tuning alignment

20‧‧‧weights

21‧‧‧ trench

30‧‧‧ Slider

31‧‧‧ long hole

32‧‧‧ trench

33‧‧‧Parallel teeth

34‧‧‧ fine-tuning scale

35‧‧‧ coarse alignment

36‧‧‧ screw holes

40‧‧‧ knife holder

41‧‧‧Parallel teeth

42‧‧‧ coarse adjustment scale

43‧‧‧through hole

44‧‧‧blade

50‧‧‧Synchronous two-way displacement mechanism

51‧‧‧ lead screw

511‧‧‧ Orthodontic teeth

512‧‧‧Reverse thread

52‧‧‧Ring nut

521‧‧‧Bumps

53‧‧‧Reverse Nuts

531‧‧‧Bumps

54‧‧‧Dicking turntable

541‧‧‧ beads

542‧‧‧ scale

543‧‧‧ hexagonal hole

P1‧‧‧slider screw

P2‧‧‧ knife seat screw

P3‧‧‧ blade screw

Q‧‧‧Latch

R‧‧‧ balls

S‧‧‧ disc spring

Claims (4)

A rotary balance cutting boring tool comprises: a boring body, a weight, a slider, a knives, and a synchronous bidirectional displacement mechanism; wherein: the boring body is provided with a through hole for accommodating The accommodating hole of the weighting block is disposed above the body of the boring device and is disposed in parallel with the accommodating hole for accommodating a sliding block, wherein a middle portion of the wall surface of the accommodating groove is disposed The utility model has a through hole and a screw hole, wherein the through hole and the screw hole are provided for a slider screw to be inserted and locked, and a slider is disposed in the middle of the hole body, and the receiving hole and the receiving groove are arranged a receiving slot for arranging a synchronous two-way displacement mechanism, the stepped surface of the boring body corresponding to the outside of the accommodating slot is provided with a corresponding pin hole, and the pin hole is provided by the pin hole Filling a plurality of balls, and inserting and closing the pin hole through the insertion end, a fine adjustment alignment line is arranged in the middle of the upper end side of the hole body, and the middle of the hole of the hole of the hole body Having a center alignment line with positive and negative symbols; The block is installed in the receiving perforation of the body of the dipper, and a groove having a slope corresponding to the synchronous bidirectional displacement mechanism is arranged above the weight, and the groove is combined with the synchronous bidirectional displacement mechanism; The block is disposed in the accommodating recess of the boring body, and the slider is provided with a long hole corresponding to the through hole and the screw hole of the accommodating groove, and the long hole is provided for a slider screw. A groove having a slope corresponding to the synchronous bidirectional displacement mechanism is arranged above the slider, and the groove is combined with the bidirectional displacement mechanism, and a plurality of parallel teeth are arranged above the slider, and the parallel teeth are configured to receive a seat. One side of the slider corresponding to the fine adjustment alignment line of the above-mentioned pupil body is provided with a set of fine-tuning scales, and a middle of the upper side of the slider is provided with a coarse alignment line, and the slider is in parallel teeth a screw hole is arranged in the middle, and the screw hole is fixed by a knife seat screw to fix a seat; The tool holder also has a plurality of parallel teeth corresponding to the parallel teeth of the slider, so that the tool holder can be slidably displaced by the parallel teeth on the parallel teeth of the slider, and the side of the knife seat corresponds to the coarse adjustment of the slider. A set of coarsely sized scales is arranged at the alignment line, and a through hole is formed in the middle of the knife seat, and the through hole is provided for a tool holder screw to be locked and locked in the screw hole of the slider, and the outer side of the tool holder is The blade screw locks a blade; the synchronous two-way displacement mechanism is provided with a lead screw in a receiving slot in the middle of the body of the boring device, the lead screw is provided with a rotating screw and a reverse screw, and simultaneously A positively rotating nut and a counter-rotating nut are respectively locked on the forward-rotating screw and the counter-rotating screw of the lead screw, and a groove corresponding to the weight of the above-mentioned counterweight is provided with a diagonal a bump that is coupled to the groove of the weight by the bump, and the reverse nut is provided with a bump having a slope corresponding to the groove of the slider, so that the reverse The rotating nut is combined with the groove of the slider, and the lead screw is provided with a disc type bomb at the inner end of the receiving slot. The other end of the lead screw is provided with a scale turntable. The circumference of the scale turntable is provided with a bead groove corresponding to the pin hole of the body of the baffle. The bead groove can be filled with a plurality of balls, and the scale turntable is circumferentially disposed. The scale may be aligned with a center alignment line of the above-mentioned boring body, and the center of the scale turret is provided with a hexagonal hole for the screwdriver to drive the rotator. The rotary balance cutting boring tool according to the first aspect of the patent application, wherein: the synchronous two-way displacement mechanism has twenty-five grids on the scale of the scale dial, and the scale dial rotates once or reverses one turn, the guide The positive-rotating nut on the screw and the counter-rotating nut are synchronously close to or far from each other by 0.5 mm, that is, the displacement of each grid is 0.02 mm, and the slope of the bump of the positive-rotating nut and the counter-rotating nut is one to four. At the time, the displacement of the weight and the slider is 0.02 mm divided by 4 equal to 0.005 mm, that is, the outer diameter of the pupil is ±0.01 mm. The rotary balance cutting boring tool according to claim 1, wherein: the arbor is provided with an elliptical groove, and the elliptical groove is provided for a screw of a seat and locked to the screw hole of the slider Wherein, a screw hole is provided in the center of the outer end surface of the weight, and the screw hole is used for locking and fixing a weight screw, and the weight screws have different weights and increase or decrease according to the displacement of the tool holder. Selecting a heavier or lighter weight screw to be fixed in the screw hole of the above weight block, so as to obtain the balance of the weight when the knife seat is moved outward. The rotary balance cutting boring tool according to claim 3, wherein the elliptical groove can increase the boring radius of the seat displacement by 4 mm.