A boring device for a tapered bore barrel

Abstract

A boring device for a tapered hole barrel comprises a boring bar (1) provided with a boring tool (11), a driving device (3) capable of driving the boring bar (1) to extend into a tapered hole (51) of a barrel (5) to rotate, and a positioning device (4) capable of fixing the tapered hole barrel (5). The boring bar (1) is a conical bar, the taper of the boring bar (1) matches the taper of the tapered hole (51) of the barrel (5), the boring tool (11) can be placed in a dovetail groove (12) to slide back and forth, and a transmission device (2) capable of driving the boring tool (11) to slide back and forth along the dovetail groove (12) is provided on the boring bar (1). The advantages are: the workpiece is fixed and clamped, the tool rod can rotate at high speed, and according to the cutting line speed requirement, the tool rod speed can reach 200-800 rpm, with high cutting efficiency, and is suitable for batch processing of tapered holes with small end holes larger than 50 mm; the present invention can move and adjust the position of the barrel through the bracket and the servo motor, and is more suitable for boring operations of tapered double barrels, and has good practicality.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, in particular to a boring device for a tapered hole barrel. Background Art

[0002] There is a Chinese utility model patent with application number CN201620948178.3 and the name of "Boring Machine" which discloses a structure, including a guide housing, a locking sleeve, a boring tool holder and a blade. The guide housing is composed of two cylindrical tubes connected together, and a bolt hole is longitudinally provided at the connection of the two cylindrical tubes, and an operating handle is installed in the bolt hole; the left end of the guide housing is internally provided with a tapered hole, and the hole is provided with an internal thread near the port, the tapered hole is connected to the locking sleeve, and the outer side of the locking sleeve is tapered; the right end of the guide housing is internally provided with a circular through hole, which is connected to the boring tool holder, and a guide groove is provided on the inner wall of the circular through hole, and the boring tool holder enters the guide housing along the guide groove, and positioning holes are respectively provided at corresponding positions of the guide housing and the upper part of the boring tool holder; a tool holder shaft is provided at the center of the boring tool holder, a boring blade and a chamfering blade are installed at the front end of the tool holder, and the rear end of the boring tool holder is connected to an adjustable speed hand drill. The utility model solves the problems of large inner diameter tolerance of stainless steel plastic composite pipe, poor installation fit and inability to use unified pipe fittings for connection, and has fast boring speed and easy operation. However, the boring machine has a slow rotation speed and low production efficiency, so the structure needs to be improved. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a boring device for a tapered bore barrel with fast boring speed, high processing efficiency and suitable for processing single-taper bore barrels or double-taper bore barrels of the same specifications in view of the above-mentioned existing technical status.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: a boring device for a tapered hole barrel, comprising a boring bar provided with a boring tool, a driving device capable of driving the boring bar to extend into the tapered hole of the barrel to rotate, and a positioning device capable of fixing the tapered hole barrel, characterized in that: the boring bar is a conical bar with a larger diameter at one end and a smaller diameter at the other end, and the taper of the boring bar is the same as the taper of the tapered hole of the barrel. The boring tool rod is adapted to be adapted, and a dovetail groove with a wide bottom and a narrow top is axially opened on the conical surface of the boring tool rod. The boring tool can be placed in the dovetail groove so as to slide back and forth. A transmission device is provided on the boring tool rod which can drive the boring tool to slide back and forth along the dovetail groove. When the boring tool bores the conical hole of the barrel through the boring tool rod, the boring tool can rotate together with the boring tool rod and move axially in the dovetail groove while being driven by the boring tool rod.

[0005] As an improvement, the transmission device includes a transmission screw, and a transmission screw is axially arranged on the central axis of the boring tool rod. The transmission screw can extend from one end of the boring tool rod into a through hole inside the boring tool rod, and the through hole extends to the other end of the boring tool rod. A sliding groove connected to the through hole is downwardly opened on the bottom surface of the dovetail groove. The transmission screw can be rotatably placed in the through hole, and the boring tool is linked to the transmission screw through a connecting piece. One end of the transmission screw is linked to the output shaft of the transmission motor. When the transmission screw rotates, the transmission screw drives the boring tool to move back and forth in the dovetail groove.

[0006] As a further improvement, the connecting part includes a connecting rod, a nut sleeve which is sleeved on the external thread of the transmission screw and can move axially along the transmission screw when the transmission screw rotates, the connecting rod can move back and forth and be placed in a slide groove, the bottom end of the connecting rod is fixedly connected to the nut sleeve, the upper end of the connecting rod is fixedly connected to the boring tool, and one end of the transmission screw extends from the end of the boring tool rod with a larger diameter and is linked to the output shaft of the transmission motor.

[0007] As an improvement, the driving device can move back and forth relative to one end face of the tapered hole barrel through a driver. The driving device includes a driving portion located at one end of the positioning device and a transmission portion located at the other end of the positioning device. The driving portion includes a driving motor and a rolling portion driven by the driving motor. The end of the boring rod with a larger diameter is fixed to the rolling portion, and the end of the transmission screw extending from the end of the boring rod with a larger diameter can rotatably pass through the axial center hole of the rolling portion and be linked to the output shaft of the driving motor. When boring the tapered hole barrel, after the tapered hole barrel is placed on the positioning device for positioning, the end of the boring rod with a smaller diameter penetrates into the tapered hole at the large diameter end of the tapered hole barrel, and extends out of the tapered hole barrel from the tapered hole at the small diameter end and is rotatably connected to the transmission portion.

[0008] As a further improvement, the rolling part includes a rolling bearing and a rolling shaft, the axial center hole is located on the axis of the rolling shaft, the rolling shaft is rotatably fixed to the fixed seat in the driving part through the rolling bearing, one end of the rolling shaft is fixed to the flange fixed to the end of the boring tool rod with a larger diameter through a flange, the other end of the rolling shaft is linked to the output shaft of the driving motor through a transmission tooth or a transmission belt, a second rolling shaft that can rotate relative to the rolling shaft is installed in the axial center hole, one end of the second rolling shaft is fixed to the end of the transmission screw extending from the end face of the boring tool rod with a larger diameter, and the other end of the second rolling shaft extends from the corresponding end face of the rolling shaft and is linked to the output shaft of the transmission motor through a transmission tooth or a transmission belt.

[0009] As a further improvement, the transmission part includes a rolling transmission bearing and a transmission roller, the transmission roller is rotatably fixed to the transmission seat of the transmission part through the transmission bearing, and the transmission roller is fixedly connected to the end face of the boring tool rod with a smaller diameter.

[0010] As a further improvement, a tensioning positioning rod is arranged in the axis center of the transmission roller, and a conical cavity is recessed on the side of the transmission roller opposite to the end face of the boring tool rod, and a cone portion adapted to the shape of the conical cavity is fixed on the end face of the boring tool rod with a smaller diameter, and a fixing hole connected to one end of the tensioning positioning rod is recessed on the outer end face of the cone portion. When the end face of the boring tool rod with a smaller diameter is connected to the transmission roller, the cone portion extends into the conical cavity, and one end of the tensioning positioning rod extends into the fixing hole of the cone portion and is fixed together by bolts, while the other end of the tensioning positioning rod extends out of the other end of the transmission roller and is fixed to the transmission roller by a fixing nut.

[0011] As an improvement, the positioning device includes at least two movable brackets arranged at intervals and capable of clamping the tapered hole barrel and driving the tapered hole barrel to move forward and backward. The movable brackets are respectively equipped with synchronous servo motors that can control the movable brackets to move forward and backward. The synchronous servo motors are connected to the CNC device through wires.

[0012] The driver is a hydraulic cylinder driver or a motor driver.

[0013] The tapered bore barrel is a tapered double barrel or a single-hole tapered bore barrel.

[0014] Compared with the prior art, the advantages of the present invention are: the workpiece is fixed and clamped, the tool rod can rotate at high speed, and according to the cutting line speed requirement, the tool rod speed can reach 200 to 800 rpm, with high cutting efficiency, and is suitable for batch processing of tapered holes with small end holes greater than 50 mm; the present invention can move and adjust the barrel position through a bracket and a servo motor, and is more suitable for boring operations of tapered double barrels, and has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a stereogram of an embodiment of the present invention;

[0016] Figure 2 yes Figure 1 A three-dimensional diagram of another angle of the embodiment;

[0017] Figure 3 yes Figure 1 A three-dimensional view of the center boring tool bar before it is inserted into the barrel;

[0018] Figure 4 yes Figure 3 Exploded diagram of

[0019] Figure 5 yes Figure 3 A top-down projection of

[0020] Figure 6 yes Figure 5 The cross section along line BB;

[0021] Figure 7 yes Figure 1 The exploded view of the structure after removing the barrel and boring bar;

[0022] Figure 8 is a three-dimensional diagram of a boring tool bar in an embodiment of the present invention;

[0023] Fig. 9 yes Figure 8 Front projection of

[0024] Fig.10 is a stereogram of the boring tool of the present invention;

[0025] Fig.11 yes Fig.10 A structural breakdown diagram from another angle;

[0026] Fig.12 It is a front projection diagram of the barrel in the present invention;

[0027] Fig.13 yes Fig. 9 Sectional view along line AA;

[0028] Fig.14 yes Fig.12 The cross-section along the CC line;

[0029] Fig.15 yes Figure 6 Enlarged view of part I;

[0030] Fig.16 yes Figure 6 Enlarged view of part II. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below with reference to the accompanying drawings.

[0032] like Figures 1 to 16As shown, the boring device of the tapered hole barrel of this embodiment includes a boring tool bar 1 provided with a boring tool 11, a driving device 3 capable of driving the boring tool bar 1 to extend into the tapered hole 51 of the barrel 5 to rotate, and a positioning device 4 capable of fixing the tapered hole barrel 5, the boring tool bar 1 is a conical tool bar with a larger diameter at one end and a smaller diameter at the other end, the taper of the boring tool bar 1 is adapted to the taper of the tapered hole 51 of the barrel 5, and a dovetail groove 12 with a top surface opening and a wide bottom and a narrow top is axially opened on the conical surface of the boring tool bar 1, and the boring tool 11 can be placed in the dovetail groove 12 to slide back and forth In the embodiment, a transmission device 2 is provided on the boring tool rod 1, which can drive the boring tool 11 to slide back and forth along the dovetail groove 12. When the boring tool 11 bores the tapered hole of the barrel through the boring tool rod 1, the boring tool 11 can rotate together with the boring tool rod 1 and move axially in the dovetail groove 12 under the drive of the boring tool rod 1. The boring tool 11 in this embodiment includes a tool head 111 and a tool holder 112. The tool head 111 can be detachably fixed to the tool holder 112, and the tool holder 112 can be detachably fixed to the connecting member 15.

[0033] The transmission device 2 includes a transmission screw 21, and a through hole 13 is axially arranged on the central axis of the boring tool rod 1 to allow the transmission screw 21 to extend from one end of the boring tool rod 1 into the interior of the boring tool rod 1, and the through hole 13 extends to the other end of the boring tool rod 1, and a sliding groove connected to the through hole 13 is downwardly opened on the bottom surface of the dovetail groove 12, and the transmission screw 21 is rotatably placed in the through hole 13, and the boring tool 11 is linked to the transmission screw 21 through a connecting piece 15, and one end of the transmission screw 21 is linked to the output shaft of the transmission motor. When the transmission screw 21 rotates, the transmission screw 21 drives the boring tool 11 to move back and forth in the dovetail groove 12. The connecting member 15 includes a connecting rod 151, a nut sleeve 152 which is sleeved on the external thread of the transmission screw 21 and can move axially along the transmission screw 21 when the transmission screw 21 rotates, the connecting rod 151 can move back and forth and be placed in the slide groove 14, the bottom end of the connecting rod 151 is fixedly connected to the nut sleeve 152, the upper end of the connecting rod 151 is fixedly connected to the boring tool 11, and one end of the transmission screw 21 extends from the end with a larger diameter of the boring tool rod 1 and is linked to the output shaft of the transmission motor.

[0034] The driving device 3 can move back and forth relative to one end surface of the tapered hole barrel 5 through the driver. The driving device 3 includes a driving part 31 located at one end of the positioning device 4 and a transmission part 32 located at the other end of the positioning device 4. The driving part 31 includes a driving motor 311 and a rolling part 312 driven by the driving motor 311. The end of the boring tool rod 1 with a larger diameter is fixed to the rolling part 312, and the end of the transmission screw 21 extending from the end of the boring tool rod 1 with a larger diameter can rotatably pass through the axial center hole of the rolling part 312 and be linked with the output shaft of the driving motor 311. When boring the tapered hole barrel 5, after the tapered hole barrel 5 is placed on the positioning device 4 for positioning, the end of the boring tool rod 1 with a smaller diameter penetrates into the tapered hole 51 at the large diameter end of the tapered hole barrel 5, and extends out of the tapered hole barrel 5 from the tapered hole 51 at the small diameter end and is rotatably connected with the transmission part 32. The rolling portion 312 includes a rolling bearing 314 and a rolling shaft 315. The axial center hole is located on the axis of the rolling shaft 315. The rolling shaft 315 is rotatably fixed to a fixed seat 316 in the driving portion 31 through the rolling bearing 314. One end of the rolling shaft 315 is fixed to a flange fixed to the larger diameter end of the boring tool rod 1 through a flange. The other end of the rolling shaft 315 is linked to the output shaft of the driving motor 311 through a transmission tooth or a transmission belt. A second rolling shaft 317 that can rotate relative to the rolling shaft 315 is installed in the axial center hole. One end of the second rolling shaft 317 is fixed to the end of the transmission screw 21 extending from the end face of the boring tool rod 1 at the larger diameter end. The other end of the second rolling shaft 317 extends from the corresponding end face of the rolling shaft 315 and is linked to the output shaft of the transmission motor through a transmission tooth or a transmission belt. The transmission part 32 includes a rolling transmission bearing 321 and a transmission roller 322. The transmission roller 322 is rotatably fixed to a transmission seat 326 of the transmission part 32 through the transmission bearing 321. The transmission roller 322 is fixedly connected to the end face of the boring tool bar 1 with a smaller diameter. A tensioning positioning rod 324 is arranged at the axis center of the transmission roller 322, and a conical cavity 325 is recessed on the side of the transmission roller 322 opposite to the end face of the boring tool rod 1, and a cone 16 matching the shape of the conical cavity 325 is fixed on the end face of the boring tool rod 1 with a smaller diameter, and a fixing hole is recessed on the outer end face of the cone 16 into which one end of the tensioning positioning rod 324 is inserted, and when the end face of the boring tool rod 1 with a smaller diameter is connected to the transmission roller 322, the cone 16 extends into the conical cavity 325, and one end of the tensioning positioning rod 324 extends into the fixing hole of the cone 16 and is fixed together by bolts, while the other end of the tensioning positioning rod 324 extends out of the other end of the transmission roller 322 and is fixed to the transmission roller 322 by a fixing nut.

[0035] The positioning device 4 includes at least two movable brackets 41 arranged at intervals and capable of clamping the tapered hole barrel 5 and driving the tapered hole barrel 5 to move forward and backward. The movable brackets 41 are respectively equipped with synchronous servo motors 42 that can control the movable brackets to move forward and backward. The synchronous servo motors 42 are connected to the numerical control device through wires.

[0036] The driver is a hydraulic cylinder driver or a motor driver. The tapered bore barrel 5 is a tapered double barrel or a single-hole tapered bore barrel.

[0037] When machining a tapered double-hole barrel, because the workpiece is heavy, high-speed eccentric rotation is dangerous, and the counterweight requirement is high, the traditional tapered double-hole barrel boring adopts a cutting speed of less than 60 rpm without rotating the tool bar. In order to obtain a tapered hole that meets the requirements, the center line of the rotating workpiece and the axial movement center line of the boring bar are at a required angle, and the production efficiency is low. The present invention adopts a fixed clamping of the workpiece, the tool bar can rotate at a high speed, and a carbide blade is used. According to the cutting line speed requirement, the tool bar speed can reach 200 to 800 rpm, with high cutting efficiency, and is suitable for batch processing of tapered holes with small end holes greater than 50 mm.

[0038] Working principle: The angle between the rotation center line of the boring tool bar and the transmission screw track is designed to be 1 / 2 of the required tapered hole processing angle. The boring tool bar is connected to the driving device and can move back and forth relative to one end face of the tapered hole barrel through the driving device. The transmission screw adjusts the speed of the boring tool axially through the transmission device. The boring tool rotates axially along the fixed angle track to feed cutting to complete the processing.

Claims

1. A boring device for a tapered bore barrel, comprising a boring bar (1) provided with a boring tool (11), a driving device (3) capable of driving the boring bar (1) to rotate so as to extend into a tapered hole (51) of a barrel (5), and a positioning device (4) capable of fixing the tapered bore barrel (5), characterized in that: The boring tool bar (1) is a conical tool bar with a larger diameter at one end and a smaller diameter at the other end. The taper of the boring tool bar (1) is adapted to the taper of the tapered hole (51) of the barrel (5). A dovetail groove (12) with a top surface open, a wide bottom and a narrow top is axially opened on the conical surface of the boring tool bar (1). The boring tool (11) can be placed in the dovetail groove (12) to slide back and forth. A transmission device (2) is provided on the boring tool bar (1) to drive the boring tool (11) to slide back and forth along the dovetail groove (12). When the boring tool (11) bores the tapered hole of the barrel through the boring tool bar (1), the boring tool (11) can rotate together with the boring tool bar (1) under the drive of the boring tool bar (1) and move axially in the dovetail groove (12). The transmission device (2) comprises a transmission screw (21), a transmission screw (21) is axially arranged on the central axis of the boring tool rod (1), and can extend from one end of the boring tool rod (1) into a through hole (13) inside the boring tool rod (1), the through hole (13) extends to the other end of the boring tool rod (1), and a sliding groove connected to the through hole (13) is opened downward on the bottom surface of the dovetail groove (12), the transmission screw (21) can be rotatably placed in the through hole (13), the boring tool (11) is linked to the transmission screw (21) through a connecting piece (15), one end of the transmission screw (21) is linked to the output shaft of the transmission motor, and when the transmission screw (21) rotates, the transmission screw (21) The boring tool (11) is driven to move back and forth in the dovetail groove (12); the connecting member (15) comprises a connecting rod (151), a nut sleeve (152) which is sleeved on the external thread of the transmission screw (21) and can move axially along the transmission screw (21) when the transmission screw (21) rotates; the connecting rod (151) can move back and forth in the slide groove; the bottom end of the connecting rod (151) is fixedly connected to the nut sleeve (152); the upper end of the connecting rod (151) is fixedly connected to the boring tool (11); one end of the transmission screw (21) extends from the end with a larger diameter of the boring tool rod (1) and is linked to the output shaft of the transmission motor;The driving device (3) can move back and forth relative to one end surface of the tapered hole barrel (5) through a driver. The driving device (3) includes a driving part (31) located at one end of the positioning device (4) and a transmission part (32) located at the other end of the positioning device (4). The driving part (31) includes a driving motor (311) and a rolling part (312) driven by the driving motor (311). The end of the boring tool rod (1) with a larger diameter is fixed to the rolling part (312). The end of the transmission screw (21) extending from the end of the boring tool rod (1) with a larger diameter can rotatably pass through the axial center hole of the rolling part (312) and be linked to the output shaft of the driving motor (311) to drive the tapered hole barrel (5). When boring, after the tapered hole machine barrel (5) is placed on the positioning device (4) for positioning, the end of the boring tool rod (1) with a smaller diameter penetrates through the tapered hole (51) at the larger diameter end of the tapered hole machine barrel (5), and extends out of the tapered hole (51) at the smaller diameter end to be rotatably connected with the transmission part (32); the rolling part (312) comprises a rolling bearing (314) and a rolling shaft (315), the axial center hole is located on the axis of the rolling shaft (315), the rolling shaft (315) is rotatably fixed to a fixed seat (316) in the driving part (31) through the rolling bearing (314), one end of the rolling shaft (315) is fixed to a flange fixed to the larger diameter end of the boring tool rod (1) through a flange, and the other end of the rolling shaft (315) is connected to the driving part (31) through a transmission tooth or a transmission belt. The output shafts of the motor (311) are linked together, and a second rolling shaft (317) that can rotate relative to the rolling shaft (315) is installed in the axial center hole. One end of the second rolling shaft (317) is fixed to the end of a transmission screw (21) extending from the end face of the boring tool rod (1) with a larger diameter. The other end of the second rolling shaft (317) extends from the corresponding end face of the rolling shaft (315) and is linked to the output shaft of the transmission motor through a transmission tooth or a transmission belt. The transmission part (32) includes a rolling transmission bearing (321) and a transmission roller (322). The transmission roller (322) is rotatably fixed to a transmission seat (326) of the transmission part (32) through the transmission bearing (321). The transmission roller (322) is fixedly connected to the end face of the boring tool rod (1) with a smaller diameter.

2. The boring device according to claim 1, characterized in that: A tensioning and positioning rod (324) is arranged at the axis of the transmission roller (322); a conical cavity (325) is arranged on the side of the transmission roller (322) opposite to the end face of the boring tool bar (1); a cone (16) matching the shape of the conical cavity (325) is fixed on the end face of the boring tool bar (1) with a smaller diameter; a fixed portion (16) is arranged on the outer end face of the cone (16) and is connected to one end of the tensioning and positioning rod (324). When the end face with a smaller diameter of the boring tool rod (1) is connected to the driving roller (322), the cone (16) extends into the conical cavity (325), one end of the tensioning and positioning rod (324) extends into the fixing hole of the cone (16) and is fixed together by bolts, while the other end of the tensioning and positioning rod (324) extends out of the other end of the driving roller (322) and is fixed together with the driving roller (322) by a fixing nut.

3. The boring device according to claim 2, characterized in that: The positioning device (4) comprises at least two movable brackets (41) arranged at intervals and capable of clamping the tapered hole barrel (5) and driving the tapered hole barrel (5) to move forward and backward. The movable brackets (41) are respectively equipped with synchronous servo motors (42) capable of controlling the movable brackets to move forward and backward. The synchronous servo motors (42) are connected to the numerical control device through wires.

4. The boring device according to claim 3, characterized in that: The driver is a hydraulic cylinder driver or a motor driver.

5. The boring device according to any one of claims 1 to 4, characterized in that: The tapered bore barrel (5) is a tapered double barrel or a single-hole tapered bore barrel.

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