CN111761077A

CN111761077A - Device for processing deep hole ring groove

Info

Publication number: CN111761077A
Application number: CN202010771180.9A
Authority: CN
Inventors: 施国繁; 梁翺; 吴广洪; 郑志杰; 王振轩
Original assignee: Foshan Nanhai Zhongnan Machinery Co ltd
Current assignee: Foshan Nanhai Zhongnan Machinery Co ltd
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2020-10-13

Abstract

The invention discloses a device for processing a deep-hole ring groove, which comprises a cutter bar, a control rod, a cutter assembly and a driving mechanism, wherein the cutter bar is arranged on the control rod; the driving mechanism is arranged at the rear end of the cutter bar; the cutter assembly comprises a cutter body and a cutter resetting mechanism; a cutter holder is arranged at the front end of the cutter rod, an installation hole is formed in the axis position of the cutter holder, a cutter groove communicated with the installation hole is formed in the cutter holder in the radial direction, and the cutter body is slidably installed in the cutter groove; the head of the control rod is arranged in the mounting hole, the head of the control rod is connected with the cutter body through a wedge-shaped connecting structure, and the tail of the control rod extends backwards to the rear end of the cutter bar to be connected with a driving mechanism; the wedge-shaped connecting structure comprises a first inclined plane arranged at the bottom of the cutter body and a second inclined plane arranged at the head of the control rod, and the first inclined plane is matched with the second inclined plane. The device for processing the deep hole ring groove can process ultra-long cylinder parts, and is simple in structure and convenient to manufacture.

Description

Device for processing deep hole ring groove

Technical Field

The invention relates to a machining turning tool, in particular to a machining device for a deep hole ring groove.

Background

When the length-diameter ratio of the cylindrical workpiece is more than 30, the cylindrical workpiece is generally called as an ultra-long cylindrical workpiece, a drilling pipe in oil exploration and development equipment belongs to the ultra-long cylindrical workpiece, annular grooves are arranged on the inner wall of the drilling pipe at intervals, and the existing machining device is difficult to machine an inner annular groove in a long pipe due to the fact that the drilling pipe is too long.

In order to solve the technical problem, the utility model with the publication number of CN 203401089U discloses an adjustable boring cutter device for reaming at the middle section of a mandrel, which comprises a workpiece, a boring cutter and a boring cutter body, wherein the inner hole of the workpiece is a reference hole, a steel ball is arranged on an annular arc raceway at the middle part of the excircle of the boring cutter body, a guide sleeve is righted to right the guide sleeve to slide along the reference hole of the workpiece, and a cutter feeding rod is fixedly arranged at the right end of the boring cutter body; the left end part of the sliding block control frame installed in the inner hole at the left end of the boring cutter body is provided with a radial long groove sliding block control frame, and the left end of the sliding block control frame slides along the inner hole of the boring cutter body; the sliding block control frame, the adjusting rod and the operating rod are fixedly connected in sequence from left to right; the adjusting rod is connected with the boring cutter body through threads; the left end part of the boring cutter body is provided with a radial rectangular through groove, the sliding block penetrates through a radial long groove at the left end of the sliding block control frame and is installed in the radial rectangular through groove of the boring cutter body, and the sliding block moves along the radial direction of the boring cutter body; the boring cutter is fixedly arranged in the radial through groove of the sliding block; after a cylindrical part of the T-shaped key of the oblique key groove provided with the T-shaped key on the side surface of the sliding block penetrates through the radial through hole of the sliding block control frame, the protruding end of the cylindrical part is positioned in the axial key groove of the inner hole wall of the left end part of the boring cutter body; when the operating rod moves along the axial direction, the sliding block drives the boring cutter to move along the radial direction of the boring cutter body under the action of the T-shaped key. However, the middle-segment reaming adjustable boring cutter device still has the following defects: the device has the advantages of complex structure, numerous parts and high production and manufacturing cost.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a device for processing a deep-hole ring groove, which not only can process an ultra-long cylinder part, but also has simple structure and convenient manufacture.

The technical scheme for solving the technical problems is as follows:

a device for processing a deep hole ring groove is characterized by comprising a hollow cutter bar, a control rod arranged in the cutter bar, a cutter assembly and a driving mechanism for driving the control rod to move axially; the driving mechanism is arranged at the rear end of the cutter bar; the cutter assembly comprises a cutter body and a cutter resetting mechanism; a cutter holder is arranged at the front end of the cutter rod, an installation hole is formed in the axis position of the cutter holder, a cutter groove communicated with the installation hole is formed in the cutter holder in the radial direction, and the cutter body is slidably installed in the cutter groove; the head of the control rod is arranged in the mounting hole, the head of the control rod is connected with the cutter body through a wedge-shaped connecting structure, and the tail of the control rod extends backwards to the rear end of the cutter bar to be connected with a driving mechanism; the wedge-shaped connecting structure comprises a first inclined plane arranged at the bottom of the cutter body and a second inclined plane arranged at the head of the control rod, and the first inclined plane is matched with the second inclined plane.

The working principle of the processing device for the deep hole ring groove is as follows:

when an annular groove needs to be machined at a position, which is deeper than a pipe orifice, in a drilling pipe, clamping the drilling pipe to be machined on a machine tool, and driving the drilling pipe to rotate by the machine tool during machining; meanwhile, the rear end of the cutter bar of the device for processing the deep-hole ring groove is clamped on a machine tool (such as a drilling machine) capable of driving the guide rod to axially extend and retract. When in processing, the machine tool drives the front end of the cutter bar to extend into the drilling pipe, so that the cutter seat arranged at the front end of the cutter bar enters the drilling pipe until the cutter body arranged on the cutter seat enters the position where the annular groove needs to be processed; the driving mechanism is arranged at the rear end of the cutter bar so as to operate at the rear end position of the cutter bar to drive the control rod to axially move and further control the feed; the specific control principle of feed is as follows: the head of the control rod is connected with the cutter body through a wedge-shaped connecting structure, specifically, a first inclined plane is arranged at the bottom of the cutter body, a second inclined plane is arranged at the head of the control rod, the first inclined plane is matched with the second inclined plane, namely the first inclined plane and the second inclined plane are mutually attached, the driving mechanism is operated to enable the control rod to move along the axial direction of the cutter rod, at the moment, the second inclined plane at the head of the control rod and the first inclined plane at the bottom of the cutter body move relatively, and the second inclined plane generates a radial outward force on the first inclined plane, so that the cutter body slidably mounted on the cutter holder moves towards the direction far away from the axis center, the cutter feeding function of the cutter body is realized, and turning processing is carried; after the machining is finished, the control rod is operated to restore the control rod to the original position, and the cutter resetting mechanism drives the cutter body to move inwards along the radial direction, so that the cutter withdrawing function is realized, and the machining of the annular groove of the drill pipe is completed.

According to a preferable scheme of the invention, the driving mechanism comprises an external thread arranged at the rear end of the cutter bar, a feed adjusting nut matched with the external thread and a driving connecting piece, wherein the cutter bar is provided with an avoidance groove extending along the axial direction at a position corresponding to the external thread; one end of the driving connecting piece is connected with the control rod, the other end of the driving connecting piece extends outwards, penetrates through the dodging groove and is located on the front side of the feed adjusting nut. In the driving mechanism with the structure, the axial movement can be realized by rotating the feed adjusting nut; because the one end and the control lever of drive connecting piece are connected, and the other end extends to reach the front side of feed adjusting nut, when feed adjusting nut moves forward, can drive connecting piece and move forward to the drive the control lever moves forward, realizes the feed.

According to a preferable scheme, the cutter comprises a cutter bar, a cutter head, a cutter rod, a cutter head, a cutter rod and a cutter head; the positioning block is provided with an elongated slot, and the positioning screw penetrates through the elongated slot to install the positioning block on the positioning block installation groove; and when the positioning block works, one end of the positioning block abuts against the driving connecting piece. The positioning block can move for a certain distance in the axial range by arranging the long groove on the positioning block, and one end of the positioning block is tightly abutted against the driving connecting piece in a working state to limit the driving connecting piece to continuously move forwards, so that the feed amount of the cutter body is controlled.

In a preferred embodiment of the present invention, the tool holder includes a first connecting section for connecting with the tool holder, a third connecting section for connecting with the machine tool, and a second connecting section connected between the first connecting section and the third connecting section, and a locking portion for connecting with the machine tool is provided at a tail portion of the third connecting section. By arranging the cutter bar with the three-section structure, the first connecting section is used for connecting the second connecting section with the cutter holder, and the third connecting section is used for connecting the cutter bar with a machine tool.

Preferably, the outer wall of the locking part is provided with an external thread. Therefore, the locking part of the third connecting section is connected with the machine tool in a threaded connection mode, so that the connection is firm, the assembly and disassembly are convenient, and the time for replacing and installing the cutter is saved during machining.

Preferably, the second connecting section comprises a connecting section body and a connecting part, the connecting part is arranged at the tail part of the second connecting section, and the outer diameter of the connecting part is smaller than that of the connecting section body; the connecting portion is provided with an external thread, the head of the third connecting section is provided with an internal thread matched with the external thread, and the second connecting section is connected with the third connecting section through the thread. Through setting up the second linkage segment and the third linkage segment of structure, when the second linkage segment of different length need be changed, threaded connection structure is very big has made things convenient for the operation of assembly and dismantlement to make the firm in connection reliable of second linkage segment and third linkage segment with threaded connection's mode, improve the security performance.

The invention also comprises a supporting structure for supporting the tail part of the control rod, wherein the supporting structure comprises a supporting ring and a supporting part for mounting the supporting ring; the support ring is provided with a containing hole matched with the control rod, the connecting part is provided with an inner hole, and the inner hole forms the supporting part; the diameter of the inner hole is larger than that of the inner cavity of the cutter bar, so that a step is formed, and one end of the support ring abuts against the step. Through setting up bearing structure, the afterbody of control lever passes the accommodation hole of support ring, and the support ring is installed on the supporting part, plays the effect of fixed stay to the afterbody of control lever.

According to a preferable scheme of the invention, the cutter holder is provided with a plurality of positioning pieces for positioning the radial position of the cutter bar, the plurality of positioning pieces are uniformly distributed along the circumferential direction of the cutter bar and are detachably mounted on the cutter holder, and the outer surfaces of the positioning pieces are matched with the inner wall of the drilling pipe. By arranging the positioning piece, when the cutter rod extends into the drilling pipe to process a ring groove, the outer surface of the positioning piece is matched with the inner wall of the drilling pipe, so that the condition that the cutter holder shakes in the drilling pipe is avoided, and the positioning function is realized on the radial position of the cutter holder; after the tool apron is used for a plurality of times, when the positioning piece is worn, the positioning piece is detachably arranged on the tool apron, so that the worn positioning piece can be detached for replacement, and the tool apron is convenient to use and ingenious in design.

Preferably, the spacer is of a wooden material. Therefore, the positioning piece can not only position the cutter rod, but also cannot abrade the inner wall of the drilling pipe in the axial movement and rotation processes.

Preferably, a chip removing groove is formed in the surface of the tool apron and is close to the tool groove, and one end of the chip removing groove is communicated with the end face of the tool apron. Through setting up above-mentioned chip groove, the smear metal that forms when the rotatory processing ring channel of cutter body falls on the chip groove, the one end of chip groove and the terminal surface intercommunication of blade holder, like this, the smear metal on the chip groove finally enters into inside the drilling pipe from the terminal surface position of blade holder, has effectively avoided the quick rotatory process smear metal of cutter body to the injury of drilling pipe inner wall.

According to a preferable scheme of the invention, the control rod comprises a connecting mandrel and an adjusting rod, the connecting mandrel comprises a mandrel front section, a mandrel middle section and a mandrel rear section, the mandrel middle section is provided with an inclined plane which is inclined inwards along the direction of the mandrel front section, and the inclined plane forms the second inclined plane; the mandrel is characterized in that a threaded hole is formed in the rear section of the mandrel, external threads are formed in the front end of the adjusting rod, and the adjusting rod is connected with the connecting mandrel through threads. The adjusting rod is connected with the connecting mandrel through threads and is used for controlling the connecting mandrel to move along the axial direction of the cutter bar; the structure that the second inclined plane inclines inwards along the direction of the front section of the mandrel is arranged, and when the connecting mandrel moves forwards, the second inclined plane generates a force outwards along the radial direction on the first inclined plane matched with the second inclined plane, so that the cutter body is fed; in addition, in order to meet the requirement of opening the annular groove at different depths in the drilling pipe, when control rods with different lengths need to be manufactured, only the adjusting rod with corresponding length needs to be manufactured, and then the adjusting rod is connected with the mandrel through threads to form the control rods with different lengths, so that the design is flexible and ingenious.

According to a preferred scheme of the invention, a control rod resetting mechanism is arranged on the control rod; the control rod resetting mechanism comprises a first spring, a spring sleeve shaft and a limiting ring; the spring sleeve shaft is arranged at the front part of the connecting mandrel to form a front section of the mandrel, and the shaft diameter of the spring sleeve shaft is smaller than that of the middle section of the mandrel; the limiting ring is arranged at the front end of the mounting hole, the first spring is sleeved on the spring sleeve shaft, and the other end of the first spring abuts against the limiting ring. Therefore, the spring sleeve is arranged on the spring sleeve shaft, one end of the spring abuts against the limiting ring, and the shaft diameter of the spring sleeve shaft is smaller than that of the middle section of the mandrel, so that the other end of the spring abuts against a step between the spring sleeve shaft and the middle section of the mandrel, and when the mandrel moves forwards, the first spring generates backward elastic force on the connecting mandrel, and the reset function of the connecting mandrel is realized.

In a preferred embodiment of the present invention, the tool resetting mechanism includes a second spring, a connection screw, a spring seat, a spring sleeve hole, a clearance groove provided on the connection mandrel for avoiding the connection screw, and a threaded hole provided on the tool body; the spring seat is provided with a screw hole, the spring sleeve hole is arranged on one side, opposite to the cutter groove, of the cutter seat, the center of the spring sleeve hole corresponds to the center of the cutter groove and is communicated with the mounting hole, and the clearance groove penetrates through the second inclined plane; one end of the second spring is mounted on the spring seat and tightly abuts against the spring seat, the other end of the second spring tightly abuts against one side of the connecting mandrel opposite to the second inclined plane, and the connecting screw enters the spring seat from the screw hole, penetrates through the clearance groove in the mandrel and is connected with the threaded hole. Through setting up the spring return mechanism of structure, second spring one end supports tightly and connects dabber and the relative one side of second inclined plane, and the other end supports tightly the spring holder to produce a power of keeping away from the connection dabber to the spring holder, because spring trepanning and sword groove design respectively in the both sides of centre bore, make spring holder and cutter body be located the both sides of connecting the dabber respectively, the spring holder pass through connecting screw with cutter body connects, therefore this elasticity produces a power that is close to the connection dabber to the cutter body, thereby realizes cutter body's the function of moving back.

Compared with the prior art, the invention has the following beneficial effects:

1. the device for processing the deep-hole ring groove comprises a cutter bar, a control rod and a cutter assembly, wherein the control rod is connected with a cutter body through a wedge-shaped connecting structure, and the radial movement of the cutter body can be realized through the axial movement of the control rod; when the cutter bar extends into the drilling pipe, the driving mechanism arranged at the rear end of the cutter bar is operated to drive the control rod to axially move, so that the cutter body is controlled to feed and retract, and the function of processing an annular groove at a position in the drilling pipe, which is deeper than the pipe orifice, is realized.

2. The wedge-shaped connecting structure of the device for processing the deep hole ring groove comprises a first inclined surface arranged at the bottom of the cutter body and a second inclined surface arranged at the head of the control rod, and the first inclined surface is matched with the second inclined surface, so that the cutter body moves along the radial direction when the control rod moves axially.

3. The device for processing the deep-hole ring groove can meet the requirement of processing ring grooves at different depths in the drilling pipe by arranging the cutter bars with different lengths, and has wide application range.

Drawings

Fig. 1 is a front sectional view of a deep-hole ring groove machining apparatus according to the present invention.

Fig. 2 is a first perspective view of the deep-hole ring groove processing device of the present invention.

Fig. 3 is a perspective view of a second viewing angle of the deep-hole ring groove processing device of the present invention.

Fig. 4 is a sectional view of a tool holder of the device for machining a deep-hole ring groove of the present invention.

Fig. 5 is a perspective view of a tool body of the device for machining a deep-hole ring groove of the present invention.

Fig. 6 is a perspective view of a connecting mandrel of the device for machining a deep-hole ring groove of the present invention.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.

Referring to fig. 1 to 6, a device for machining a deep-hole ring groove is characterized by comprising a hollow cutter bar, a control rod arranged in the cutter bar, a cutter assembly and a driving mechanism for driving the control rod to move axially; the driving mechanism is arranged at the rear end of the cutter bar; the cutter assembly comprises a cutter body 7 and a cutter resetting mechanism; a cutter holder 1 is arranged at the front end of the cutter rod, mounting holes 1-3 are formed in the position of an axis of the cutter holder 1, cutter grooves 1-5 communicated with the mounting holes are formed in the cutter holder in the radial direction, and the cutter body is slidably mounted in the cutter grooves; the head of the control rod is arranged in the mounting hole, the head of the control rod is connected with the cutter body 7 through a wedge-shaped connecting structure, and the tail of the control rod extends backwards to the rear end of the cutter bar to be connected with a driving mechanism; the wedge-shaped connecting structure comprises a first inclined surface 7-1 arranged at the bottom of the cutter body 7 and a second inclined surface 5-2-1 arranged at the head of the control rod, and the first inclined surface 7-1 is matched with the second inclined surface 5-2-1.

Referring to fig. 1-3, the driving mechanism includes an external thread provided at a rear end of the cutter bar, a feed adjusting nut 10 engaged with the external thread, and a driving connection member 11, and the cutter bar is provided with an axially extending bypass groove 3-2-1 at a position corresponding to the external thread; one end of the driving connecting piece 11 is connected with the control rod, and the other end of the driving connecting piece extends outwards, penetrates through the avoiding groove 3-2-1 and is positioned on the front side of the feed adjusting nut 10. In the driving mechanism with the structure, the axial movement can be realized by rotating the feed adjusting nut 10; because one end of the driving connecting piece 11 is connected with the control rod, and the other end extends to the front side of the feed adjusting nut 10, when the feed adjusting nut 10 moves forwards, the driving connecting piece 11 can be driven to move forwards, so that the control rod is driven to move forwards, and feed is realized.

Referring to fig. 1 and 3, the cutter comprises a positioning structure for controlling the amount of feed, the positioning structure comprises a positioning block 12, a positioning screw and a positioning block mounting groove 3-1-1, the positioning block mounting groove 3-1-1 is axially arranged at the rear end of the cutter bar and is positioned at the front side of the avoidance groove 3-2-1, and a threaded hole matched with the positioning screw is formed in the positioning block mounting groove 3-1-1; the positioning block 12 is provided with a long groove, and the positioning screw penetrates through the long groove to install the positioning block 12 on the positioning block installation groove 3-1-1; in a working state, one end of the positioning block 12 abuts against the driving connecting piece 11. The positioning block 12 can move a certain distance in the axial range by arranging the long groove on the positioning block 12, and in a working state, one end of the positioning block 12 abuts against the driving connecting piece 11 to limit the driving connecting piece 11 to move forwards continuously, so that the feed amount of the cutter driving body 7 is controlled.

Referring to fig. 1-3, the tool bar comprises a first connecting section 2 for connecting with a tool holder 1, a third connecting section 4 for connecting with a machine tool, and a second connecting section 3 connected between the first connecting section 2 and the third connecting section 4, and the tail of the third connecting section 4 is provided with a locking part 4-1 for connecting with the machine tool. Through the cutter bar with the three-section structure, the first connecting section 2 is used for connecting the second connecting section 3 with the cutter holder 1, and the third connecting section 4 is used for connecting the cutter bar with a machine tool.

Referring to fig. 1 to 3, the outer wall of the locking part 4-1 is provided with external threads. In this way, the locking part 4-1 of the third connecting section 4 is connected with the lathe in a threaded connection mode, and the locking part is connected with the lathe in a threaded connection mode, so that the locking part is firm in connection, convenient to assemble and disassemble, and capable of saving time for replacing and installing tools during machining.

Referring to fig. 1-3, the second connection section 3 includes a connection section body 3-1 and a connection part 3-2, the connection part 3-2 is disposed at the tail of the second connection section 3, and the outer diameter of the connection part 3-2 is smaller than the outer diameter of the connection section body 3-1; the connecting portion 3-2 is provided with an external thread, the head of the third connecting section 4 is provided with an internal thread matched with the external thread, and the second connecting section 3 is connected with the third connecting section 4 through the thread. Through setting up second linkage segment 3 and third linkage segment 4 of structure, when the second linkage segment 3 of different length need be changed, threaded connection structure is very big has made things convenient for the operation of assembly and dismantlement to make second linkage segment 3 and third linkage segment 4's firm in connection reliable with threaded connection's mode, improve the security performance.

Referring to fig. 1, a support structure for supporting the tail of the control rod is further included, and the support structure comprises a support ring 13 and a support part 3-2-2 for mounting the support ring 13; a containing hole matched with the control rod is formed in the support ring 13, an inner hole is formed in the connecting part 3-2, and the inner hole forms the supporting part 3-2-2; the diameter of the inner hole is larger than that of the inner cavity of the cutter bar, so that a step is formed, and one end of the support ring 13 abuts against the step. By arranging the supporting structure, the tail part of the control rod penetrates through the accommodating hole of the supporting ring 13, and the supporting ring 13 is arranged on the supporting part 3-2-2 and plays a role in fixing and supporting the tail part of the control rod.

Referring to fig. 2 and 3, the cutter holder 1 is provided with a plurality of positioning members 1-1 for positioning the radial position of the cutter bar, the plurality of positioning members 1-1 are uniformly arranged along the circumferential direction of the cutter bar and are detachably mounted on the cutter holder 1, and the outer surface of each positioning member 1-1 is matched with the inner wall of the drill pipe. By arranging the positioning piece 1-1, when the cutter bar extends into the drilling pipe to process a ring groove, the outer surface of the positioning piece 1-1 is matched with the inner wall of the drilling pipe, so that the condition that the cutter holder 1 shakes in the drilling pipe is avoided, and the positioning piece has a positioning effect on the radial position of the cutter holder 1; after the positioning piece 1-1 is used for a plurality of times, when the positioning piece 1-1 is worn, the positioning piece 1-1 can be detachably arranged on the cutter holder 1, so that the worn positioning piece 1-1 can be detached for replacement, and the use is convenient and the design is ingenious.

Referring to fig. 2 and 3, the positioning member 1-1 is made of wood. Therefore, the positioning piece 1-1 can not only play a role in positioning the cutter rod, but also can not abrade the inner wall of the drill pipe in the rotating process, and the positioning piece 1-1 can also be made of plastic, nylon and other materials with lower rigidity.

Referring to fig. 2 and 4, a chip removing groove 1-2 is arranged on the surface of the tool holder 1 near the tool groove 1-5, and one end of the chip removing groove 1-2 is communicated with the end surface of the tool holder 1. Through the arrangement of the chip removing grooves 1-2, chips formed when the cutter body 7 rotates to process the annular groove fall onto the chip removing grooves 1-2, and one end of each chip removing groove 1-2 is communicated with the end face of the cutter holder 1, so that the chips on the chip removing grooves 1-2 finally enter the drill pipe from the end face of the cutter holder 1, and the damage of the chips to the inner wall of the drill pipe in the quick rotating process of the cutter body 7 is effectively avoided.

Referring to fig. 1 and 6, the control rod includes a connecting mandrel 5 and an adjusting rod 6, the connecting mandrel 5 includes a mandrel front section 5-1, a mandrel middle section 5-2 and a mandrel rear section 5-3, the mandrel middle section 5-2 is provided with an inclined plane which is inclined inward along the direction of the mandrel front section 5-1, and the inclined plane forms the second inclined plane 5-2-1; the mandrel rear section 5-3 is provided with a threaded hole, the front end of the adjusting rod 6 is provided with an external thread, and the adjusting rod 6 is connected with the connecting mandrel 5 through a thread. The control rod with the structure is arranged, the second inclined surface 5-2-1 on the connecting mandrel 5 and the first inclined surface 7-1 at the bottom of the cutter body 7 form a wedge-shaped connecting structure, and the adjusting rod 6 is in threaded connection with the connecting mandrel 5 and is used for controlling the connecting mandrel 5 to move along the axial direction of the cutter rod; the second inclined surface 5-2-1 is arranged to be inclined inwards along the direction of the front section 5-1 of the mandrel, and when the connecting mandrel 5 moves forwards, the second inclined surface 5-2-1 generates a force outwards along the radial direction on the first inclined surface 7-1 matched with the second inclined surface, so that the cutter body 7 is fed; in addition, in order to meet the requirement of opening the annular groove at different depths in the drilling pipe, when control rods with different lengths need to be manufactured, only the adjusting rod 6 with corresponding length needs to be manufactured, and then the adjusting rod 6 is connected with the mandrel through threads to form the control rods with different lengths, so that the design is flexible and ingenious.

Referring to fig. 1, 4 and 6, a control rod reset mechanism is arranged on the control rod; the control rod resetting mechanism comprises a first spring 14, a spring sleeve shaft and limiting rings 1-4; the spring sleeve shaft is arranged at the front part of the connecting mandrel 5 to form a front section 5-1 of the mandrel, and the shaft diameter of the spring sleeve shaft is smaller than that of the middle section 5-2 of the mandrel; the limiting ring 1-4 is arranged at the front end of the mounting hole 1-3, the first spring 14 is sleeved on the spring sleeve shaft, and the other end of the first spring abuts against the limiting ring 1-4. Thus, the spring is sleeved on the spring sleeve shaft, one end of the spring abuts against the limiting ring 1-4, the shaft diameter of the spring sleeve shaft is smaller than that of the mandrel middle section 5-2, the other end of the spring abuts against a step between the spring sleeve shaft and the mandrel middle section 5-2, and when the mandrel moves forwards, the first spring 14 generates backward elasticity on the connecting mandrel 5, so that the reset function of the connecting mandrel 5 is realized.

Referring to fig. 1, 4 and 6, the cutter reset mechanism comprises a second spring 8, a connecting screw, a spring seat 9, a spring sleeve hole 1-6, a clearance groove 5-2-2 arranged on the connecting mandrel 5 for avoiding the connecting screw, and a threaded hole arranged on the cutter body 7; the spring seat 9 is provided with a screw hole, the spring sleeve hole 1-6 is arranged on one side of the tool apron 1 opposite to the tool groove 1-5, the center of the spring sleeve hole 1-6 corresponds to the center of the tool groove 1-5 and is communicated with the mounting hole 1-3, and the clearance groove 5-2-2 penetrates through the second inclined surface 5-2-1; one end of the second spring 8 is mounted on the spring seat 9 and abuts against the spring seat 9, the other end of the second spring abuts against one side of the connecting mandrel 5 opposite to the second inclined surface 5-2-1, and the connecting screw enters the spring seat 9 from the screw hole, penetrates through the clearance groove 5-2-2 on the mandrel and is connected with the threaded hole. Through the spring reset mechanism with the structure, one end of the second spring 8 is tightly propped against one side of the connecting mandrel 5 opposite to the second inclined surface 5-2-1, and the other end of the second spring is tightly propped against the spring seat 9, so that a force far away from the connecting mandrel 5 is generated on the spring seat 9, the spring seat 9 and the cutter body 7 are respectively positioned on two sides of the central hole due to the fact that the spring sleeve holes 1-6 and the cutter grooves 1-5 are respectively designed on two sides of the central hole, and the spring seat 9 is connected with the cutter body 7 through a connecting screw, so that the elastic force generates a force close to the connecting mandrel 5 on the cutter body 7, and the cutter withdrawing function of the cutter body 7 is.

when an annular groove needs to be machined at a position, which is deeper than a pipe orifice, in a drilling pipe, clamping the drilling pipe to be machined on a machine tool, and driving the drilling pipe to rotate by the machine tool during machining; meanwhile, the rear end of the cutter bar of the device for processing the deep-hole ring groove is clamped on a machine tool (such as a drilling machine) capable of driving the guide rod to axially extend and retract. When in processing, the machine tool drives the front end of the cutter bar to extend into the drilling pipe, so that the cutter holder 1 at the front end of the cutter bar enters the drilling pipe until the cutter body 7 arranged on the cutter holder 1 enters the position needing to be lathed, and the rear end of the cutter bar is fixed on the machine tool; the driving mechanism is arranged at the rear end of the cutter bar and can be operated at the rear end of the cutter bar, so that the movement of the control rod is realized; the head of control lever is connected through wedge-shaped connection structure with cutter body 7, and is specific: the bottom of the cutter body 7 is provided with a first inclined surface 7-1, the head of the control rod is provided with a second inclined surface 5-2-1, the first inclined surface 7-1 is matched with the second inclined surface 5-2-1, namely, the first inclined surface 7-1 is mutually attached with the second inclined surface 5-2-1, the driving mechanism is operated to enable the control rod to axially move along the direction of the cutter rod, at the moment, the second inclined surface 5-2-1 at the head of the control rod and the first inclined surface 7-1 at the bottom of the cutter body 7 relatively move, and the second inclined surface 5-2-1 generates a radial outward force on the first inclined surface 7-1, so that the cutter body 7 slidably mounted on the cutter holder 1 moves towards the direction far away from the center of the circle, and the cutter feeding function of the cutter body 7 is realized; the control rod is operated to return the control rod to the original position, the cutter resetting mechanism gives a force inwards in the radial direction to the cutter body 7, so that the cutter body 7 moves towards the center of a circle, the cutter withdrawing function of the turning tool is realized, and finally the function of processing an annular groove at the position of the drill pipe, which is deeper than the pipe orifice, is realized.

The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.

Claims

1. A device for processing a deep hole ring groove is characterized by comprising a hollow cutter bar, a control rod arranged in the cutter bar, a cutter assembly and a driving mechanism for driving the control rod to move axially; the driving mechanism is arranged at the rear end of the cutter bar; the cutter assembly comprises a cutter body and a cutter resetting mechanism; a cutter holder is arranged at the front end of the cutter rod, an installation hole is formed in the axis position of the cutter holder, a cutter groove communicated with the installation hole is formed in the cutter holder in the radial direction, and the cutter body is slidably installed in the cutter groove; the head of the control rod is arranged in the mounting hole, the head of the control rod is connected with the cutter body through a wedge-shaped connecting structure, and the tail of the control rod extends backwards to the rear end of the cutter bar to be connected with a driving mechanism; the wedge-shaped connecting structure comprises a first inclined plane arranged at the bottom of the cutter body and a second inclined plane arranged at the head of the control rod, and the first inclined plane is matched with the second inclined plane.

2. The device for processing the deep hole ring groove according to claim 1, wherein the driving mechanism comprises an external thread arranged at the rear end of the cutter bar, a feed adjusting nut matched with the external thread and a driving connecting piece, and the cutter bar is provided with an axially extending avoiding groove at a position corresponding to the external thread; one end of the driving connecting piece is connected with the control rod, the other end of the driving connecting piece extends outwards, penetrates through the dodging groove and is located on the front side of the feed adjusting nut.

3. The processing device of the deep hole annular groove according to claim 2, further comprising a positioning structure for controlling the amount of feed, wherein the positioning structure comprises a positioning block, a positioning screw and a positioning block mounting groove, the positioning block mounting groove is axially arranged at the rear end of the cutter bar and is located at the front side of the dodging groove, and a threaded hole matched with the positioning screw is formed in the positioning block mounting groove; the positioning block is provided with an elongated slot, and the positioning screw penetrates through the elongated slot to install the positioning block on the positioning block installation groove; and when the positioning block works, one end of the positioning block abuts against the driving connecting piece.

4. The device for machining the deep-hole ring groove as claimed in claim 3, wherein the tool bar comprises a first connecting section for connecting with the tool holder, a third connecting section for connecting with a machine tool, and a second connecting section connected between the first connecting section and the third connecting section, and a locking part for connecting with the machine tool is arranged at the tail part of the third connecting section.

5. The device for machining the deep-hole ring groove according to claim 4, wherein the second connecting section comprises a connecting section body and a connecting part, the connecting part is arranged at the tail part of the second connecting section, and the outer diameter of the connecting part is smaller than that of the connecting section body; the connecting portion is provided with an external thread, the head of the third connecting section is provided with an internal thread matched with the external thread, and the second connecting section is connected with the third connecting section through the thread.

6. The apparatus for machining deep hole and ring groove of claim 5, further comprising a support structure for supporting the tail of the control rod, wherein the support structure comprises a support ring and a support part for mounting the support ring; the support ring is provided with a containing hole matched with the control rod, the connecting part is provided with an inner hole, and the inner hole forms the supporting part; the diameter of the inner hole is larger than that of the inner cavity of the cutter bar, so that a step is formed, and one end of the support ring abuts against the step.

7. The device for machining the deep-hole annular groove according to claim 1, wherein the cutter holder is provided with a plurality of positioning members for positioning the radial position of the cutter bar, the plurality of positioning members are uniformly arranged along the circumferential direction of the cutter bar and are detachably mounted on the cutter holder, and the outer surface of each positioning member is matched with the inner wall of the drill pipe.

8. The device for machining the deep-hole ring groove according to claim 6, wherein the control rod comprises a connecting mandrel and an adjusting rod, the connecting mandrel comprises a mandrel front section, a mandrel middle section and a mandrel rear section, the mandrel middle section is provided with an inclined surface which is inclined inwards along the direction of the mandrel front section, and the inclined surface forms the second inclined surface; the mandrel is characterized in that a threaded hole is formed in the rear section of the mandrel, external threads are formed in the front end of the adjusting rod, and the adjusting rod is connected with the connecting mandrel through threads.

9. The device for machining the deep-hole annular groove according to claim 8, wherein the control rod is provided with a control rod resetting mechanism; the control rod resetting mechanism comprises a first spring, a spring sleeve shaft and a limiting ring; the spring sleeve shaft is arranged at the front part of the connecting mandrel to form a front section of the mandrel, and the shaft diameter of the spring sleeve shaft is smaller than that of the middle section of the mandrel; the limiting ring is arranged at the front end of the mounting hole, the first spring is sleeved on the spring sleeve shaft, and the other end of the first spring abuts against the limiting ring.

10. The device for processing the deep hole annular groove according to claim 9, wherein the cutter resetting mechanism comprises a second spring, a connecting screw, a spring seat, a spring sleeve hole, a clearance groove arranged on the connecting mandrel and used for avoiding the connecting screw, and a threaded hole arranged on the cutter body; the spring seat is provided with a screw hole, the spring sleeve hole is arranged on one side, opposite to the cutter groove, of the cutter seat, the center of the spring sleeve hole corresponds to the center of the cutter groove and is communicated with the mounting hole, and the clearance groove penetrates through the second inclined plane; one end of the second spring is mounted on the spring seat and tightly abuts against the spring seat, the other end of the second spring tightly abuts against one side of the connecting mandrel opposite to the second inclined plane, and the connecting screw enters the spring seat from the screw hole, penetrates through the clearance groove in the mandrel and is connected with the threaded hole.