A deep hole cutting tool with a front guide

Abstract

The application discloses a deep hole boring tool with a front guide, and belongs to the field of boring tools. The deep hole boring tool with the front guide comprises a boring bar and a double-edge boring tool with the same shaft and fixed connection. The end of the double-edge boring tool away from the boring bar is equipped with a front guide unit with the same shaft. The front guide unit comprises a guide frame fixedly connected to the end of the double-edge boring tool away from the boring bar and with the same shaft as the double-edge boring tool. The circumferential side of the guide frame is provided with a plurality of support groove arrays in a ring shape. The interiors of the plurality of support grooves are all equipped with outwardly extending guide supports. The guide supports are wooden supports. The interiors of the support grooves are provided with cutting fluids. The deep hole boring tool with the front guide can realize the auxiliary positioning of the double-edge boring tool by using a second inner hole with the same shaft as a first inner hole, and can simply realize the secondary boring processing of the first inner hole and has high machining precision.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of boring tools, more particularly, to a front guide boring deep hole tool. BACKGROUND

[0002] In the process of machining complex drill collars with inner hole root end face, high-precision complex step hole features need to be machined, and the step inner hole needs to be repaired after machining.

[0003] When repairing the step inner hole, the drill jig has lost the positioning key part and cannot be positioned and used, so the tool needs to be repositioned using other means to ensure accuracy, which is relatively difficult and increases the difficulty of secondary boring processing. SUMMARY

[0004] 1. Technical problem to be solved

[0005] In view of the problems in the prior art, the purpose of the present application is to provide a front guide boring deep hole tool, which can realize the auxiliary positioning of the double-blade boring tool using the same second inner hole as the first inner hole, and relatively simply realize the secondary boring processing of the first inner hole with high machining precision.

[0006] 2. Technical scheme

[0007] To solve the above problems, the present application adopts the following technical scheme.

[0008] A front guide boring deep hole tool comprises a boring tool rod and a double-blade boring tool with the same shaft and fixed connection, the double-blade boring tool is equipped with a front guide unit with the same shaft at the end away from the boring tool rod, the front guide unit comprises a guide frame fixedly connected to the double-blade boring tool at the end away from the boring tool rod and with the same shaft as the double-blade boring tool, a plurality of support groove arrays are arranged on the circumferential side of the guide frame, and a plurality of outwardly extending guide supports are arranged in the plurality of support grooves.

[0009] Further, the guide support is a wooden support, and the inside of the support groove is provided with cutting fluid.

[0010] Further, the guide support is a movable support slidingly connected in the support groove, the inside of the guide frame is equipped with an adjusting unit, and one end of the movable support extends into the inside of the guide frame and is connected with the adjusting unit.

[0011] Further, the adjusting unit comprises a pushing table and a plurality of guide blocks, the guide blocks are fixedly connected with the movable supporting rods respectively, and the guide blocks close to the side edges of the pushing table are guide edges, the pushing table is slidingly connected with the shaft in the guiding frame, and a moving adjusting piece is arranged on the guiding frame and connected with the pushing table.

[0012] Further, the guiding frame is internally provided with a reset piece connected with the guide block, the reset piece comprises a return spring fixedly connected with the guide block, and a side lug is arranged between the return spring and the side wall of the guiding frame.

[0013] Further, the moving adjusting piece comprises a threaded rod and a threaded ring which are screw-connected, the threaded rod is rotationally connected in the guiding frame and extends to the outside of the guiding frame at one end, the threaded ring is fixedly connected with the pushing table, a positioning shaft rod is fixedly connected with the axis of the guiding frame, and the pushing table is slidingly connected with the outside of the positioning shaft rod.

[0014] Further, the guiding frame and the double-blade boring tool are designed in a split type, and the guiding frame and the double-blade boring tool are connected through a split connecting piece.

[0015] Further, the split connecting piece comprises an inner shaft rod fixedly connected with the double-blade boring tool, the inner shaft rod is inserted into the internally open channel groove of the positioning shaft rod, two sliding pieces which can extend to the outside of the inner shaft rod are arranged at one end of the inner shaft rod, the sliding pieces are slidingly connected with the channel groove, the inner shaft rod is further provided with a movement assembly connected with the sliding pieces, and the outer side of the inner shaft rod is provided with a locking piece connected with the movement assembly.

[0016] Further, the movement assembly comprises a pull rod slidingly connected in the inner shaft rod, two transmission lugs are fixedly connected with one end of the pull rod close to the sliding pieces, two inclined grooves are arranged on the sliding pieces, and the transmission lugs are slidingly connected with the inclined grooves respectively.

[0017] The locking piece comprises a sliding frame, a threaded part and an adjusting ring, the sliding frame is fixedly connected with the pull rod, a sliding groove is arranged on the outer side of the inner shaft rod, the end of the pull rod extends to the outer side of the inner shaft rod through the sliding groove, the threaded part is fixedly arranged on the outer side of the inner shaft rod, the adjusting ring is screw-connected on the outer side of the threaded part, an arc-shaped ring is arranged on the inner side of the adjusting ring, and the end of the sliding frame is located in the arc-shaped ring.

[0018] Further, the movable supporting rod comprises a fixed supporting rod connected with the guide block, the fixed supporting rod is slidingly connected in the supporting groove, an outer sliding rod is slidingly connected with the fixed supporting rod away from the guide block along the axis direction of the guiding frame, and a reset assembly is arranged between the fixed supporting rod and the outer sliding rod.

[0019] 3. Beneficial effects

[0020] Compared with the prior art, the present application has the advantages that:

[0021] (1) The present application can use the same second inner hole as the first inner hole axis to assist in positioning the double-blade boring tool by setting the front guide unit, which is relatively simple to realize the secondary boring of the first inner hole and has high machining precision.

[0022] (2) The present application can repeatedly adjust the movable support bar by adjusting the unit to move the movable support bar inside the support bar groove, which has low single-use cost.

[0023] (3) The present application can separate the double-blade boring tool and the guide frame when installing or dismounting the guide frame by setting the guide frame and the double-blade boring tool in a split design, which provides users with more operating space and facilitates user operation. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a sectional view of the workpiece body of the present application;

[0025] Figure 2 is a schematic view of the overall structure of the present application;

[0026] Figure 3 is a schematic view of the other end structure of the present application; Figure 2 is a schematic view of the other end structure of the present application;

[0027] Figure 4 is a sectional view of the front guide unit of the present application;

[0028] Figure 5 is a sectional side view of the front guide unit of the present application;

[0029] Figure 6 is a sectional view of the split connecting piece of the present application;

[0030] Figure 7 is a schematic view of the movable support bar of the present application.

[0031] Explanation of reference numerals in the drawings:

[0032] 1, boring bar; 2, double blade boring cutter; 3, guide frame; 4, movable stay; 41, fixed stay; 42, outer slide; 43, first magnet; 44, second magnet; 5, stay groove; 6, detachable connector; 7, guide block; 8, push table; 9, side ear; 10, return spring; 11, threaded rod; 12, threaded ring; 13, positioning shaft rod; 14, inner shaft rod; 15, sliding sheet; 16, approach groove; 17, pull rod; 18, transmission ear; 19, sliding frame; 20, adjustment unit; 21, adjustment ring; 22, inclined groove; 23, sliding groove; 24, threaded part; 25, arc-shaped ring; 26, workpiece main body; 27, first inner hole; 28, second inner hole. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0034] Embodiment:

[0035] Please refer to Figures 1-7 A front guide deep hole boring tool comprises a boring bar 1, which is preferably made of hard alloy and has high strength. One end of the boring bar 1 is fixedly connected with a double blade boring cutter 2 having the same axis as the boring bar 1. When the double blade boring cutter 2 rotates, the first inner hole 27 inside can be reamed. The end of the double blade boring cutter 2 away from the boring bar 1 is assembled with a front guide unit having the same axis as the double blade boring cutter 2. By installing the front guide unit into the second inner hole 28, the double blade boring cutter 2 can be effectively positioned at the axis of the first inner hole 27, and the double blade boring cutter 2 is bored, so that the double blade boring cutter 2 can be positioned by the second inner hole 28 having the same axis as the first inner hole 27, the secondary boring of the first inner hole 27 is relatively simple to realize, and the machining precision is high.

[0036] Among them, please refer to Figures 2-3As shown, the front guide unit includes a guide frame 3 fixedly connected to the double-edge boring tool 2 at the end away from the boring tool rod 1 and having the same axis as the double-edge boring tool 2. The guide frame 3 can have various shapes, and is preferably cylindrical. The periphery of the guide frame 3 is provided with a plurality of support bar grooves 5 arranged in a ring shape. The plurality of support bar grooves 5 are each internally fitted with an outwardly extending guide support bar. The guide support bar has no specific shape requirement. The guide support bar has at least two points or a plane at a position away from the axis of the guide frame 3. When a straight line between the two points or the plane is parallel to the axis of the guide frame 3, the axis of the guide frame 3 is parallel to and overlaps the axis of the second inner hole 28 when the guide support bar abuts against the side wall of the second inner hole 28. Thus, the guide frame 3 can be relatively simply inserted into the inside of the workpiece body 26 and taken out. By adjusting the outwardly extending length of the guide support bar, the guide frame 3 can be applied to boring holes of different sizes for adjustment.

[0037] The structure of the guide support bar can be various as long as the above functions can be achieved. In the present technical solution, the following two schemes are introduced in detail.

[0038] The first scheme is that the guide support bar is a wooden support bar. The wooden support bar can be a standard size customized by the manufacturer or a self-made support bar. The inside of the support bar groove 5 is provided with cutting fluid. After the wooden support bar is filled into the inside of the support bar groove 5, the wooden support bar is positioned firmly by using the water swelling feature of wood. At the same time, the size of the wooden support bar is 0.5-0.10 mm larger than the size of the support bar groove 5, and an interference fit is adopted. A guide arc of 15 degrees is processed at the front end of the wooden support bar. When this scheme is adopted, the structure is relatively simple, and the production cost is relatively low.

[0039] Please refer to Figures 2-3 The second scheme is that the guide support bar is a movable support bar 4 slidably connected in the inside of the support bar groove 5. The movable support bar 4 is preferably long strip-shaped. The inside of the guide frame 3 is fitted with an adjusting unit 20. One end of the movable support bar 4 extends to the inside of the guide frame 3 and is connected to the adjusting unit 20. At this time, the movable support bar 4 can be moved in the inside of the support bar groove 5 by the adjusting unit 20, and can be repeatedly adjusted. No wooden consumables are used, and the single use cost is relatively low.

[0040] Please refer to Figure 4 The mechanism of the adjusting unit 20 is introduced in detail. Specifically, the adjusting unit 20 includes a push table 8 and a plurality of guide blocks 7. The plurality of guide blocks 7 are respectively fixedly connected to the plurality of movable support bars 4. The side edge of the guide block 7 close to the push table 8 is a guide edge. One end of the guide edge close to the push table 8 is inclined away from the push table 8. The push table 8 is slidably connected at the axis of the inside of the guide frame 3. The push table 8 is preferably a combination of a circular table body and a cylindrical body. When the push table 8 slides, the guide blocks 7 are extruded. The guide edge of the guide block 7 converts the action to make the movable support bar 4 extend outward.

[0041] Meanwhile, in order to drive the movable support 4 to reset automatically, and avoid the movable support 4 from being stuck when inserted into the hole, the inside of the guide frame 3 is provided with a reset part connected with the guide block 7, which specifically comprises a return spring 10 fixedly connected with the guide block 7, and a side lug 9 provided between the return spring 10 and the side wall of the guide frame 3. By stretching the side lug 9 through the return spring 10, the guide block 7 can drive the movable support 4 to extend outward.

[0042] In addition, in order to enable the push table 8 to move, the guide frame 3 is provided with a movement adjusting part connected with the push table 8, which comprises a threaded rod 11 and a threaded ring 12 in threaded connection, the threaded rod 11 is rotatably connected inside the guide frame 3, and one end thereof extends to the outside of the guide frame 3, and the threaded ring 12 is fixedly connected with the push table 8. At this time, by rotating the threaded rod 11, the threaded ring 12 can be driven to move, so that the push table 8 is driven to move along the axis of the guide frame 3, and after the movement is completed, the push table 8 is locked through the thread, so that it has better stability when locked.

[0043] Since only one threaded ring 12 is connected with the push table 8, the push table 8 may rotate with the threaded ring 12 as the center. In order to avoid such rotation, a positioning shaft 13 is fixedly connected at the axis of the guide frame 3, and the push table 8 is slidably connected outside the positioning shaft 13.

[0044] In order to more conveniently insert the guide frame 3 into the inside of the second inner hole 28, the guide frame 3 and the double-edge boring cutter 2 are preferably designed in a split type, which specifically means that the guide frame 3 and the double-edge boring cutter 2 are connected through a split connecting part 6, and when the guide frame 3 is installed or disassembled, the double-edge boring cutter 2 and the guide frame 3 are separated, so that the user has a larger operation space and is convenient for operation.

[0045] Please refer to Figures 4-6 The specific structure of the split connecting part 6 will be described in detail. The split connecting part 6 comprises an inner shaft 14 fixedly connected with the double-edge boring cutter 2, a guide groove 16 with an open end is formed in the inside of the positioning shaft 13, and the inner shaft 14 is inserted into the inside of the guide groove 16. In order to avoid the inner shaft 14 from falling off from the inside of the guide groove 16, two sliding pieces 15 extendable to the outside of the inner shaft 14 are assembled at one end of the inner shaft 14, and the sliding pieces 15 are slidably connected with the guide groove 16. When the sliding pieces 15 move to the inside of the guide groove 16, the inner shaft 14 can be limited.

[0046] Please refer to Figure 6 In order to adjust the sliding pieces 15, the inside of the guide frame 3 is further provided with a motion assembly connected with the sliding pieces 15, and the outside of the inner shaft 14 is provided with a locking part connected with the motion assembly.

[0047] Specifically, the action assembly comprises a pull rod 17 slidably connected in the inner shaft 14, two transmission ears 18 are fixedly connected to one end of the pull rod 17 close to the sliding block 15, two inclined grooves 22 are formed in the two sliding blocks 15, and the two transmission ears 18 are slidably connected with the two inclined grooves 22 respectively. When the pull rod 17 moves along the axis direction of the inner shaft 14, the transmission ears 18 can pull the inclined grooves 22, so that the sliding block 15 moves.

[0048] The locking member comprises a sliding frame 19, a threaded portion 24 and an adjusting ring 21. The sliding frame 19 is fixedly connected to the pull rod 17. The outer side of the inner shaft 14 is provided with a sliding groove 23, and the end of the pull rod 17 extends to the outer side of the inner shaft 14 through the sliding groove 23. The threaded portion 24 is fixedly arranged on the outer side of the inner shaft 14. The adjusting ring 21 is threadedly connected to the outer side of the threaded portion 24. The adjusting ring 21 can be moved on the outer side of the threaded portion 24 by rotating the adjusting ring 21. The inner side of the adjusting ring 21 is provided with an arc-shaped ring 25, and the end of the sliding frame 19 is located in the arc-shaped ring 25. The sliding frame 19 can be moved by the movement of the adjusting ring 21. The position of the sliding frame 19 is adjusted to pull the pull rod 17.

[0049] Please refer to Figure 5 The specific structure of the movable support bar 4 will be described in detail. The movable support bar 4 comprises a fixed support bar 41 connected with the guide block 7. The fixed support bar 41 is slidably connected in the support groove 5. The end of the fixed support bar 41 away from the guide block 7 is slidably connected with an outer sliding bar 42 along the axis direction of the guide frame 3. A reset assembly is arranged between the fixed support bar 41 and the outer sliding bar 42 to drive the outer sliding bar 42 to reset. When the guide frame 3 moves in the second inner hole 28, the displacement of the guide frame 3 can be adapted by the sliding between the outer sliding bar 42 and the fixed support bar 41, without moving the outer sliding bar 42, thereby reducing the abrasion between the outer sliding bar 42 and the inner wall of the second inner hole 28.

[0050] The reset assembly comprises a first magnet 43 and a second magnet 44 which are magnetically attracted to each other. The first magnet 43 and the second magnet 44 are fixedly connected to the fixed support bar 41 and the outer sliding bar 42 respectively.

[0051] In use: the guide frame 3 is inserted into the inside of the second inner hole 28, and then the threaded rod 11 is rotated to drive the push table 8 to move, the push table 8 is used to lift the guide block 7, the movable support strip 4 is extended to the outside of the guide frame 3, until the multiple movable support strips 4 are in abutment with the inner wall of the second inner hole 28, at this time, the annular outer diameter of the multiple movable support strips 4 is the outer diameter of the front guide unit, and the outer diameter is matched with the inner diameter of the second inner hole 28, so that it can only move along the axis direction of the second inner hole 28, then the boring cutter rod 1 and the double-blade boring cutter 2 are driven to rotate by the machine, and the first inner hole 27 can be processed by secondary boring, and the double-blade boring cutter 2 is guided by the front guide unit during processing, so that the boring precision can be effectively ensured.

[0052] The above merely illustrates the preferred embodiments of the present application; however, the protection scope of the present application is not limited to this. Any person skilled in the art, according to the technical range disclosed in the present application, and according to the technical scheme and the improved concept of the present application, should be covered in the protection scope of the present application.

Claims

1. A deep hole cutting tool with a front guide, comprising a boring bar (1) and a double blade boring head (2) with the same axis and fixedly connected, characterized in that: The double-edge boring tool (2) is equipped with a front guide unit with the same axis at the end away from the boring tool rod (1), the front guide unit comprises a guide frame (3) fixedly connected to the double-edge boring tool (2) at the end away from the boring tool rod (1) and with the same axis as the double-edge boring tool (2), a plurality of support groove (5) in annular array are arranged on the periphery of the guide frame (3), and a plurality of the support groove (5) are internally equipped with outwardly extending guide support; The guide support is a movable support (4) slidingly connected in the support groove (5), the guide frame (3) is internally equipped with an adjusting unit (20), and one end of the movable support (4) extends to the inside of the guide frame (3) and is connected to the adjusting unit (20); The adjusting unit (20) comprises a push table (8) and a plurality of guide blocks (7), a plurality of the guide blocks (7) are fixedly connected to a plurality of movable supports (4), respectively, and the side edge of the guide block (7) close to the push table (8) is a guide edge, the push table (8) is slidingly connected to the axis in the guide frame (3), and the guide frame (3) is provided with a movement adjusting part connected with the push table (8); The inside of the guide frame (3) is provided with a reset part connected with the guide block (7), the reset part comprises a return spring (10) fixedly connected to the guide block (7), and the return spring (10) and the side wall of the guide frame (3) are provided with a side ear (9) therebetween; The movement adjusting part comprises a threaded rod (11) and a threaded ring (12) connected by screw threads, the threaded rod (11) is rotatably connected in the guide frame (3), one end of which extends to the outside of the guide frame (3), the threaded ring (12) is fixedly connected to the push table (8), the guide frame (3) is fixedly connected with a positioning shaft (13) at the axis, and the push table (8) is slidingly connected to the outside of the positioning shaft (13); The guide frame (3) and the double-edge boring tool (2) are designed in a split type, and the guide frame (3) and the double-edge boring tool (2) are connected through a split connecting part (6); The split connecting part (6) comprises an inner shaft (14) fixedly connected to the double-edge boring tool (2), the inside of the positioning shaft (13) is provided with a one-end-open guide groove (16), the inner shaft (14) is inserted into the inside of the guide groove (16), one end of the inner shaft (14) is equipped with two sliding pieces (15) which can extend to the outside of the inner shaft (14), the sliding pieces (15) are slidingly connected with the guide groove (16), and the inside of the inner shaft (14) is further equipped with a motion assembly connected with the sliding pieces (15), the outside of the inner shaft (14) is equipped with a locking part connected with the motion assembly; The motion assembly comprises a pull rod (17) slidingly connected in the inner shaft (14), two transmission ears (18) are fixedly connected to one end of the pull rod (17) close to the sliding pieces (15), two inclined grooves (22) are formed in the two sliding pieces (15), respectively, and the two transmission ears (18) are slidingly connected with the two inclined grooves (22), respectively. The locking piece comprises a sliding frame (19), a threaded part (24) and an adjusting ring (21), the sliding frame (19) is fixedly connected to the pull rod (17), the outer side of the inner shaft rod (14) is provided with a sliding groove (23), the end of the pull rod (17) extends to the outer side of the inner shaft rod (14) through the sliding groove (23), the threaded part (24) is fixedly arranged on the outer side of the inner shaft rod (14), the adjusting ring (21) is threadedly connected to the outer side of the threaded part (24), the inner side of the adjusting ring (21) is provided with an arc-shaped ring (25), and the end of the sliding frame (19) is located in the arc-shaped ring (25).

2. A gun-drilling deep hole cutting tool as claimed in claim 1, characterized in that: The guide support is a wooden support, and the inside of the support groove (5) is provided with cutting fluid.

3. A gun-drill according to claim 1, wherein: The movable support (4) comprises a fixed support (41) connected with the guide block (7), the fixed support (41) is slidably connected in the inside of the support groove (5), and the end, away from the guide block (7), of the fixed support (41) is slidably connected with an outer sliding bar (42) along the axis direction of the guide frame (3), and the fixed support (41) and the outer sliding bar (42) are provided with a reset assembly.

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