CN206373381U - A kind of adjustable fine boring cutter and its self-centering fine-adjusting unit - Google Patents

Abstract

An adjustable fine boring tool and its self-centering fine-tuning unit, including a tool handle, on which a clamping hole groove is arranged; a tool rod is slidably arranged in the clamping hole groove; The centering fine-tuning unit is set in the adjustment hole; the self-centering fine-tuning unit is matched in the adjustment part at the end of the cutter bar; the self-centering fine-tuning unit includes an adjustment bolt and an adjustment block, and the adjustment block is rotatably connected to the adjustment bolt; One end of the block is provided with a tool receiving groove, which corresponds to the clamping hole groove; the tail of the tool rod slides and fits in the tool receiving groove; the two side walls of the tool receiving groove are symmetrically arranged with the axis center of the adjustment block. block, and the forcing block is slidably fitted in the adjustment part. The adjustable fine boring tool and its self-centering fine-tuning unit not only design a tool receiving groove that slides and fits with the tail of the cutter bar, but also set a driving mechanism for adjusting the drive on the side wall of the groove, so that the drive does not hinder the sliding of the cutter bar. The telescopic adjustment stroke of the knife rod is greatly increased.

Description

An adjustable fine boring tool and its self-centering fine-tuning unit

technical field

The utility model relates to the technical field of cutting tools, in particular to an adjustable fine boring tool and a self-centering fine-tuning unit thereof.

Background technique

The inner hole cutting tool is an indispensable and important tool in hole machining. Practice has proved that through the presetting of the tool, the cutting time of the boring machine can be increased from 25% to 50% of the total working time.

Adjusting the tool on the boring bar has the following advantages:

(1) If the adjustment range of the boring tool is quite large, one tool can be used to process a certain diameter range.

(2) Although the blade has not yet reached its service life, its wear will inevitably cause changes in the machining diameter. Variations in diameter can be corrected by adjusting the cutter so that the cutter material is fully utilized. For the boring head of combined machine tools used in mass production, automatic adjustment can be realized by connecting the compensation device and the measuring device.

The boring tool adjustment device has formed many adjustment principles in its development process. The various adjustment principles can basically be divided into two main forms. One adjustment principle is that only the boring tool moves, and the boring bar keeps its original position. One adjustment principle is to change the position of the entire boring bar.

For the case where only the boring tool moves, the adjustment unit in the prior art often has a complicated structure and is not suitable for being installed on a small-diameter boring bar.

For example, JP Special Opening 2011104700A of Japan Co., Ltd. JTEKT discloses an adjustable fine boring tool. A boring tool 52 and an adjustment rod 51 are arranged in the horizontal groove of the large tool bar, and a rack 52b is arranged at the tail of the boring tool. The head of the rod 51 is also provided with a rack 53c, and the rack 53c and the rack 52b are press-fitted on the gear 54 up and down. Move the adjusting rod 51 forward in the horizontal groove, drive the boring tool 52 to retract into the large tool bar through the gear and rack, and reduce the cutting diameter of the boring tool; Knife 52 is moved out of the large cutter bar forward, enlarging the cutting diameter of boring cutter. Rack and gear are established in the transverse groove, and the driving device for moving forward and backward of the adjustment rod 51 is also required to be connected with the adjustment rod 51 . This adjustment unit is only suitable for the adjustment of a single boring tool, and it cannot be adjusted synchronously with multiple tools. At least the driving device of the adjustment unit is exposed outside the large tool bar, which increases the minimum diameter of the tool bar that can be bored. After all, the large tool bar must be inserted into the hole for boring.

How to develop an adjustment unit with a simplified structure that is suitable for installation on a small-diameter tool holder and has a relatively large tool holder adjustment stroke, preferably directly on the machine tool, has become a common problem in the development of the industry.

Utility model content

In view of the above-mentioned defects in the prior art, the purpose of this utility model is to provide an adjustable fine boring tool and its self-centering fine-tuning unit.

The purpose of this utility model is achieved in this way, an adjustable fine boring tool, including a tool handle, the tool handle is symmetrically provided with at least one clamping hole on the same horizontal plane around the center of the rotation axis;

The end of the handle is provided with an adjustment hole along the axis, and the adjustment hole is connected to the clamping hole groove;

The knife bar is slidingly set in the clamping hole; the tail of the knife bar is provided with an adjustment part on the side parallel to the axis of the knife bar;

The self-centering fine-tuning unit is arranged in the adjustment hole; the self-centering fine-tuning unit is matched in the adjustment part at the end of each cutter bar;

The self-centering fine-tuning unit includes an adjustment bolt and an adjustment block, the adjustment block is rotatably connected to the adjustment bolt, and the adjustment bolt is screw-fitted in the adjustment hole;

The adjustment block has a rotation axis, and one end of the adjustment block is provided with at least one tool receiving groove, and the tool receiving groove corresponds to the clamping hole; ; On the two side walls of each tool receiving groove, a forcing block is arranged symmetrically to the center of the rotation axis of the adjusting block, and the forcing block is slidably fitted in the adjusting part.

Further, the adjustment part includes an adjustment groove, and the adjustment groove is obliquely arranged on both sides of the tail part of the cutter bar; the adjustment groove starts from the top surface of the rectangular part, and is inclined downward at an inclination angle with the axial direction of the cutter head body part. extend.

Further, the forcing block starts from the top surface of the tool receiving groove vertically downward for a certain distance, and protrudes from the two sides of the tool receiving groove so as to extend obliquely and downward at an inclination angle with the axial direction of the cutter head body. On the side wall, the distance between the top surface of the forcing block and the top surface of the tool receiving groove is the downward distance.

Further, the forcing block and the adjusting groove have the same inclination angle, and the inclination angle is between 50° and 70°.

Further, the upper pad pressing piece is fixed in the clamping hole groove, the upper pad pressing piece also includes a guide hole, and the adjustment block also has a circumferential guide surface, and the circumferential guide surface is slidably fitted in the guide hole.

Further, the bottom surface of the clamping hole serves as the bottom jaw, and the bottom jaw is provided with a tool bar guide;

Or the lower pad pressing piece is fixed in the clamping hole, the lower pad pressing piece includes a bottom jaw guide part, and the bottom jaw guide part replaces the cutter bar guide part;

The cutter bar includes a straight part, and the straight part includes a guide rail body, which is slidably fitted in the guide part of the cutter bar.

Further, a locking portion is provided on the top surface of the clamping hole, and the locking portion includes a locking hole, and a locking bolt is screw-fitted in the locking hole and locked against the top surface of the rectangular portion.

A self-centering fine-tuning unit for a boring tool, the boring tool includes a tool handle, and at least one tool bar is provided at the end of the tool handle to slide symmetrically around the center of the tool handle axis in a horizontal direction; In the adjustment slot on the side wall of the tail of the cutter bar, an adjustment bolt and an adjustment block are included, and the adjustment block is rotatably connected to the adjustment bolt;

The adjustment block has a rotation axis, and one end of the adjustment block is provided with at least one tool receiving groove corresponding to the position of the tool rod, and the two side walls of each tool receiving groove are respectively obliquely protruding from the side wall symmetrically with the center of the rotation axis. There is a forcing block, and the forcing block is slidably fitted in the adjustment groove on the side wall of the tail of the cutter bar.

Further, the forcing block and the adjusting groove have the same inclination angle, and the inclination angle is between 50° and 70°.

Further, the forcing block starts from the top surface of the tool receiving groove vertically downward for a certain distance, and protrudes from the two sides of the tool receiving groove so as to extend obliquely and downward at an inclination angle with the axial direction of the cutter head body. On the side wall, the distance between the top surface of the forcing block and the top surface of the tool receiving groove is the downward distance.

The adjustable fine boring tool and its self-centering fine-tuning unit, in order to solve the technical problem of "simplified structure can not only be suitable for installation on a small-diameter tool bar but also have a relatively large tool bar adjustment stroke", through the following technologies means:

1) The adjustment block is provided with a tool accommodation slot, and the tail of the tool bar slides and fits in the tool accommodation slot, which is called fit I

The adjustment block adjusts and moves up and down on the central axis of the tool handle perpendicular to the sliding surface of the tool bar, and the tool accommodating groove provides enough space for the tool bar to shrink inwardly and outwardly in the clamping hole.

2) The forcing block set on the side wall and the adjustment groove are slidingly matched, which is called fit II

The side wall of the cutter accommodating groove is protruding and obliquely provided with a forcing block, and the side wall of the tail of the knife rod is inclined to set an adjustment groove, and the forcing block slides and fits in the adjusting groove, which can drive the cutter rod to move a certain distance in the cutter accommodating groove; such a setting Allowing coordination II to give way to the stroke of coordination I, the combination of the two has achieved unexpected technical effects.

The applicant abandoned the design of the designed forcing block on the wall of the cone to cooperate with the design of the adjustment groove on the inclined surface of the tail of the cutter rod. With this design, the stroke of the tail of the cutter rod is occupied by the cone itself. Therefore, the retraction of the cutter rod The stroke is relatively shortened; and the design of the above-mentioned cooperation I combined with the cooperation II of the present application, the driving structure allows the stroke space for the retraction and sliding of the knife rod. Even if the diameter of the knife handle is small, the retraction stroke of the knife rod is relatively increased. The tail of the cutter bar can also be designed into a wedge shape, and when the three cutter bars are stacked, it is just the thickness of one cutter bar. Therefore, the design of matching I combined with matching II has achieved the technical effect of obtaining a relatively large retraction stroke in a narrow space, which is especially obvious when multiple tool holders are adjusted at the same time.

The adjustable fine boring tool and its self-centering fine-tuning unit not only design a tool receiving slot that slides and fits with the tail of the tool bar, but also set an adjustment drive mechanism on the side wall of the slot, so that the driving does not occupy the sliding stroke of the tool bar at the same time. The telescopic adjustment stroke of the tool rod is greatly increased.

Description of drawings

Fig. 1 is the main sectional view (section position B-B) of the adjustable fine boring tool and its self-centering fine-tuning unit of the utility model.

Fig. 2 is a top view of the adjustable fine boring tool and its self-centering fine-tuning unit of the present invention.

Fig. 3 is an A-direction view of the adjustable fine boring tool and its self-centering fine-tuning unit of the present invention.

Fig. 4 is a main sectional view (section position C-C) of the adjustable fine boring tool and the adjustment block of the self-centering fine-tuning unit of the utility model.

Fig. 5 is a top view of the adjustable fine boring tool and the adjusting block of the self-centering fine-tuning unit of the utility model.

Fig. 6 is a schematic diagram of the movement direction of the retractable limit position of the adjustable fine boring tool and its self-centering fine-tuning unit of the utility model.

Fig. 7 is a schematic diagram of the movement direction of the adjustable fine boring tool and the self-centering fine-tuning unit of the utility model, where the tool bar extends to the limit position.

Reference numerals in the above figures:

1 Shank, 2 Clamping Hole, 3 Upper Pad Presser, 4 Lower Pad Presser, 5 Bottom Jaw, 6 Locking Part, 7 Locking Bolt, 8 Tool Arbor, 9 Adjusting Part, 10 Square Part, 11 Adjusting Bolt, 12 adjusting block, 13 forcing block, 14 locking hole, 15 bottom jaw surface, 16 reference arrow, 17 tightening scale, 18 threaded part, 19 guiding part of adjusting block, 30 self-centering fine-tuning unit

1.1 Adjustment hole, 2.1 Upper positioning step, 2.2 Lower upper positioning step, 3.1 Upper fixing groove, 4.1 Lower fixing groove, 4.2 Bottom jaw guide, 5.1 Tool bar guide

8.1 Body part of cutter head, 8.2 Cutting edge part

10.1 Guide rail body, 12.1 Movable connection hole, 12.2 Tool receiving groove, 12.3 Circumferential guide surface

detailed description

Embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings, but they are not used to limit the scope of the present utility model.

As shown in Figures 1 to 3, an adjustable fine boring tool includes a handle 1, and the center of the handle 1 is symmetrically provided with one or more clamping holes 2, and the tool bar 8 is slidably arranged in the clamping holes 2. middle. Preferably, the number of clamping holes 2 is 2-4; the end of the handle 1 is provided with an adjustment hole 1.1 along the axis, and the adjustment hole 1.1 is connected to the clamping hole 2; the end of the handle 1 corresponds to the clamping hole The slot 2 is provided with at least two locking holes 14 , and the locking holes 14 communicate with the clamping hole slot 2 . The adjustment hole 1.1 includes a threaded portion 18 and an adjustment block guide portion 19;

The clamping hole 2 is a rectangular or square groove. The clamping hole 2 is provided with an upper positioning step 2.1 and a lower upper positioning step 2.2. The bottom surface of the clamping hole is used as the bottom jaw 5; the bottom jaw 5 A cutter bar guide 5.1 is provided; said cutter bar guide is preferably a dovetail groove. The supporting bottom surface of the tool bar guide part 5.1 is used as the bottom jaw surface 15 for clamping the tool; the bottom jaw surfaces 15 of the two or three clamping hole grooves are on the same horizontal plane.

More preferably, the upper pad pressing piece 3 and the lower pad pressing piece 4 are fixed in the clamping hole groove 2, the upper pad pressing piece 3 includes an upper fixing groove 3.1, and the fixing step 3.1 is fixed on the upper side by bolts. On the positioning step 2.1; the lower pad pressing piece 4 includes a lower fixing groove 4.1 and a bottom jaw guide part 4.2, and the bottom jaw guide part 4.2 replaces the guide part 5.1 on the bottom jaw 5; the lower fixing groove 4.1 is fixed by bolts On the lower positioning step 2.2; the top surface of the clamping hole 2 is provided with a locking part 6, the locking part 6 includes a locking hole 14, and the locking bolt 7 is screw-fitted in the locking hole 14 and abuts against the top surface of the tool Locking; preferably, two locking holes correspond to locking a knife bar 8; the upper pad pressing piece 3 also includes a guide hole 3.2;

The upper pad pressing sheet 3 and the lower pad pressing sheet 4 are for the convenience of processing and the durability and easy replacement of the cutting tool.

The cutter bar 8 includes a cutter head body 8.1 and a cutting edge 8.2, and the cutting edge 8.2 is integrally welded to the cutter head body 8.1; or the cutting edge 8.2 is bolted to the cutter head body 8.1.

The cutter head body part 8.1 includes a rectangular part 10, the rectangular part 10 is provided with a guide rail body 10.1 and an adjustment part 9, and the guide rail body 10.1 is slidably fitted in the guide part 5.1 or the bottom jaw guide part 4.2; the adjustment part 9 includes an adjustment groove 9.1, the adjustment groove 9.1 is obliquely arranged on both sides of the rear part of the rectangular part 10 . The adjustment groove 9.1 starts from the top surface 10.2 of the rectangular part 10 and extends downward at an angle of 50° to 70° from the axial direction of the cutter head body. The depth of groove 9.1 is 15～30mm.

As shown in Figure 4 and Figure 5, it also includes a self-centering fine-tuning unit 30, an adjustment hole 1.1 is provided at the end of the handle 1, and the self-centering fine-tuning unit 30 is arranged in the adjustment hole; the self-centering fine-tuning unit 30 cooperates in the adjustment Part 9. The self-centering fine-tuning unit 30 includes an adjusting bolt 11 and an adjusting block 12. The adjusting bolt 11 is screw-fitted in the adjusting hole 1.1. The adjusting bolt 11 presses against the adjusting block 12 or the adjusting block 12 is rotatably connected to the adjusting bolt 11. middle. One end of the adjustment block 12 is provided with a movable connection hole 12.1, and the other end is provided with a tool receiving groove 12.2, and each tool receiving groove 12.2 is provided with a forcing block 13 on the two side walls, and the forcing block 13 is used to adjust the axis of the block 12. Central symmetry, that is, all the forcing blocks 13 are at the same distance from the axis of rotation; the adjustment block 12 also has a circumferential guide surface 12.3, and the circumferential guide surface 12.3 is slidably fitted in the adjustment block guide portion 19; or the circumferential guide surface 12.3 Sliding fit in the guide hole 3.2 of the upper pad pressing piece 3.

As shown in Figures 6 and 7, the forcing block 13 protrudes from the two side walls of the tool receiving groove 12.2, and the distance between the top surface of the forcing block 13 and the top surface of the tool receiving groove is Downward distance H; the forcing block 13 starts from the top surface of the tool receiving groove and descends downward for a distance H, and extends downward at an inclination angle α of 50°-70° to the axial direction of the cutter head body, and the cross section is rectangular , dovetail, square, preferably, the forcing block 13 is integrally formed with the side wall of the tool receiving groove; the thickness of the forcing block 13 is 15-30mm.

Preferably, the forcing block 13 and the adjusting groove 9.1 have the same inclination angle α. It is also possible that the inclination angle of the forcing block 13 is smaller than the inclination angle of the adjusting groove 9.1.

More preferably, the side wall of the cutter bar tail is perpendicular to the support surface on which the cutter bar slides, i.e. the bottom jaw surface 15, so that each rotation of the adjusting bolt 11 allows the cutter bar to expand and contract longer, which is more convenient. There is adjustment efficiency.

When the cutter head body part 8.1 is installed in the clamping hole groove 2, the adjustment block 12 of the self-centering fine-tuning unit 30 guides and fits in the guide hole 3.2 of the upper pad pressing piece 3, and the forcing block 13 respectively fits in the corresponding rectangular In the adjustment groove 9.1 of the part 10.1.

When the adjustable fine boring tool is installed in the machine tool, screw the adjusting bolt 11 clockwise, for example, the adjusting bolt adopts M39 pitch H=1.5mm, and every time the adjusting bolt 11 is rotated one week, the adjusting bolt 11 goes down by a pitch of 1.5mm; adjust The bolt 11 presses the adjusting block down by 1.5mm, that is, the forcing block 13 moves down by 1.5mm; assuming that the inclination angle α between the forcing block 13 and the tool axis is 60°, the forcing block 13 drives the cutter head body 8.1 to move a distance L to the center _Knife = 0.86mm, specifically:

The end face of the adjustment bolt 11 is provided with a rotation reference arrow 16 , and the end face of the cutter bar is provided with a reference scale 17 . The end face of the adjustment bolt 11 can be divided according to a circle of 360°, and the displacement of the cutter head body 8.1 corresponding to the rotation of the bolt by a certain angle α is marked on the corresponding angle line, which is convenient for reference during adjustment. Adjust to the predetermined cutting diameter, then tighten the locking part 6 to fix the position of each cutter head body part 8.1 in the clamping hole groove 2.

Changing the angle of inclination of the forcing block 13, the length of the forcing block itself and the up and down positions in the tool receiving groove 12.2 can determine that the self-centering fine-tuning unit 30 can adjust the minimum diameter of the cutter head body part 8.1 (such as As shown) and maximum diameter (as shown).

Since the forcing block 13 is center-symmetrical to the rotation axis of the adjusting block 12, it is determined that the displacement of the cutter head body portion 8.1 in each clamping hole 2 is equal.

In the adjustable fine boring tool and its self-centering fine-tuning unit, an adjustment block is arranged in the hole at the end of the tool bar perpendicular to the tool holding groove, and the forcing block on the side wall of the tool receiving groove of the adjustment block cooperates with the side wall of the tool tail. Adjustment groove, the moving block moves up and down to drive the adjustment groove, thereby driving the cutter itself to move inward or outward in the clamping hole groove, the structure is simple, only the small adjustment block in the center of the cutter rod completes the cutter head The fine-tuning function is suitable for smaller tool holders, and the adjustment can be completed directly on the machine tool without disassembly.

Claims (10)

1. An adjustable fine boring tool, comprising a handle (1), is characterized in that, The tool handle (1) is symmetrically provided with at least one clamping hole (2) around the center of the rotation axis on the same horizontal plane; An adjustment hole (1.1) is provided at the end of the handle (1) along the rotation axis, and the adjustment hole (1.1) communicates with the clamping hole groove (2); The knife rod (8) is slidably arranged in the clamping hole (2); the tail of the knife rod is provided with an adjustment part (9) on the side parallel to the axis of the knife rod; The self-centering fine-tuning unit (30) is arranged in the adjustment hole; the self-centering fine-tuning unit is matched in the adjustment part (9) at the end of each cutter bar; The self-centering fine-tuning unit (30) includes an adjustment bolt (11) and an adjustment block (12), the adjustment block (12) is rotatably connected to the adjustment bolt (11), and the adjustment bolt (11) is screw-fitted in the adjustment In hole (1.1); The adjustment block (12) has a rotation axis (Y), and one end of the adjustment block (12) is provided with at least one tool receiving groove (12.2), and the tool receiving groove corresponds to the clamping hole groove; the The tail of the cutter bar is slidingly fitted in the cutter receiving groove; the two side walls of each cutter receiving groove (12.2) are respectively provided with a force block (13) centered symmetrically with the rotation axis (Y) of the adjustment block (12), The forcing block (13) is slidingly fitted in the adjustment part (9). 2. An adjustable fine boring tool according to claim 1, characterized in that, the adjustment part (9) includes an adjustment groove (9.1), and the adjustment groove (9.1) is obliquely arranged On the side surface: the adjustment groove (9.1) starts from the top surface of the rectangular part and extends downward at an inclination angle (α) with the axial direction of the cutter head body part. 3. An adjustable fine boring tool as claimed in claim 1, characterized in that, the said forcing block (13) starts after a certain distance vertically downward from the top surface of the tool receiving groove, and is connected to the body part of the tool head. The axial direction protrudes downwards at an inclined angle (α) and is arranged on the two side walls of the tool receiving groove (12.2), and the top surface of the driving block (13) is 100mm away from the top surface of the tool receiving groove. The distance is the downlink distance (H). 4. An adjustable fine boring tool according to claim 1, characterized in that, the forcing block (13) has the same inclination angle (α) as the adjustment groove (9.1), and the inclination angle (α) is between 50° and 70°. 5. An adjustable fine boring tool according to claim 2, characterized in that, the upper pad pressing piece (3) is fixed in the clamping hole groove (2), and the upper pad pressing piece (3) also includes The guide hole (3.2), the adjustment block (12) also has a circumferential guide surface (12.3), and the circumferential guide surface (12.3) is slidingly fitted in the guide hole (3.2). 6. An adjustable fine boring tool according to claim 1, characterized in that, the bottom surface of the clamping hole (2) is used as a bottom jaw (5), and the bottom jaw (5) is provided with a tool bar guide (5.1); Or the lower pad pressing piece (4) is fixed in the clamping hole (2), and the lower pad pressing piece (4) includes a bottom jaw guide (4.2), and the bottom jaw guide (4.2) replaces the tool bar guide ( 5.1); The cutter bar (8) includes a straight part (10), and the straight part (10) includes a guide rail body (10.1), which is slidingly fitted in the cutter bar guide part (5.1). 7. An adjustable fine boring tool according to claim 1 or 6, characterized in that, the top surface of the clamping hole (2) is provided with a locking part (6), and the locking part (6) A locking hole (14) is included, and a locking bolt (7) is screw-fitted in the locking hole (14) and abutted against the top surface of the rectangular part (10) for locking. 8. A self-centering fine-tuning unit for a boring tool, the boring tool includes a handle, and the end of the handle horizontally slides symmetrically around the center of the handle axis to be provided with at least one tool bar; the self-centering fine-tuning unit for the boring tool is perpendicular to the knife The rod fits in the adjustment groove (9.1) of the side wall at the end of the cutter bar, and it is characterized in that, It includes an adjusting bolt (11) and an adjusting block (12), and the adjusting block (12) is rotatably connected to the adjusting bolt (11); The adjustment block (12) has an axis of rotation (Y), and one end of the adjustment block (12) is provided with at least one cutter receiving groove (12.2) corresponding to the position of the cutter bar, and each cutter receiving groove (12.2) has two sidewalls respectively A forcing block (13) is integrally formed obliquely protruding from the side wall with the center of the rotation axis (Y), and the forcing block (13) is slidably fitted in the adjustment groove (9.1) of the side wall at the tail of the cutter bar. 9. A boring tool self-centering fine-tuning unit according to claim 8, characterized in that, the forcing block (13) has the same inclination angle (α) as the adjusting groove (9.1), and the The inclination angle (α) is between 50° and 70°. 10. A boring tool self-centering fine-tuning unit as claimed in claim 8, characterized in that, said forcing block (13) starts from the top surface of the tool receiving groove vertically downward for a certain distance, and is connected to the tool head body The axial portion of the part protrudes obliquely and downwards on the two side walls of the tool receiving groove (12.2) at an angle of inclination (α), and the top surface of the driving block (13) is far from the top of the tool receiving groove. The distance of the face is the down distance (H).