阅读说明：本技术 多刀杆镗管机 (Multi-cutter-bar pipe boring machine ) 是由 李新中 刘钢 于 2021-08-24 设计创作，主要内容包括：提供一种多刀杆镗管机,将刀杆机架上方设置的多个刀杆通过固定于刀杆机架上的定心支撑装置安装于刀杆机架上,刀杆机架上设有可沿其长度方向移动的托架,托架上设有与多个刀杆右端连接并用于驱动多个刀杆转动的旋转驱动装置,托架上设有与刀杆机架侧壁连接并用于驱动托架沿刀杆机架长度方向移动的进给驱动装置；工件机架上方的多个与对应位置处的刀杆同轴设置的工件通过固定于工件机架上的多个锁定支撑装置支撑固定于工件机架上。本发明大大提高了无缝钛管的加工效率,提高了对工件和刀杆支撑的稳定性和可靠性,解决了刀杆运转过程中因支撑结构不稳定而出现的振动、蹦刀的弊端,提高了无缝钛管的加工精度,加工成本低,可批量化生产无缝钛管。(The multi-cutter bar boring machine is characterized in that a plurality of cutter bars arranged above a cutter bar rack are arranged on the cutter bar rack through a centering support device fixed on the cutter bar rack, a bracket capable of moving along the length direction of the cutter bar rack is arranged on the cutter bar rack, a rotary driving device connected with the right ends of the cutter bars and used for driving the cutter bars to rotate is arranged on the bracket, and a feeding driving device connected with the side wall of the cutter bar rack and used for driving the bracket to move along the length direction of the cutter bar rack is arranged on the bracket; a plurality of workpieces which are arranged above the workpiece rack and are coaxial with the cutter bars at the corresponding positions are supported and fixed on the workpiece rack through a plurality of locking and supporting devices fixed on the workpiece rack. The invention greatly improves the processing efficiency of the seamless titanium tube, improves the stability and reliability of supporting the workpiece and the cutter bar, overcomes the defects of vibration and cutter jumping caused by unstable supporting structure in the operation process of the cutter bar, improves the processing precision of the seamless titanium tube, has low processing cost and can produce the seamless titanium tube in batch.)

1. The multi-cutter-bar pipe boring machine is characterized in that: the cutter bar driving device comprises a cutter bar rack (1) and a workpiece rack (2) which is arranged at the left side of the cutter bar rack (1) and corresponds to the cutter bar rack (1) end to end, wherein a plurality of cutter bars (3) arranged above the cutter bar rack (1) are arranged on the cutter bar rack (1) through centering support devices (9) fixed on the cutter bar rack (1), a bracket (4) capable of moving along the length direction of the cutter bar rack (1) is arranged on the cutter bar rack (1), a rotary driving device (5) which is connected with the right ends of the cutter bars (3) and used for driving the cutter bars (3) to rotate is arranged on the bracket (4), and a feeding driving device (6) which is connected with the side wall of the cutter bar rack (1) and used for driving the bracket (4) to move along the length direction of the cutter bar rack (1) is arranged on the bracket (4); a plurality of workpieces (7) which are arranged above the workpiece rack (2) and coaxial with the cutter bars (3) at the corresponding positions are supported and fixed on the workpiece rack (2) through a plurality of locking and supporting devices (8) fixed on the workpiece rack (2), the cutter bars (3) are driven by the rotary driving device (5) to rotate, and then the feed driving device (6) drives the bracket (4) to drive the cutter bars (3) to feed in the boring direction, so that the floating boring cutter (10) arranged at the end part of the cutter bar (3) bores holes along the boring end of the workpiece (7).

2. The multi-tool stem pipe boring machine of claim 1, wherein: the centering support device (9) comprises a bottom plate (9-1), a lower centering plate (9-2) and an upper centering plate (9-3), connecting plates (9-4) are fixed at the lower end of the lower centering plate (9-2) and the upper end of the upper centering plate (9-3), the connecting plates (9-4) at the lower end of the lower centering plate (9-2) are welded and fixed on the bottom plate (9-1), and the bottom plate (9-1) is fixed on a cross bar of the cutter bar rack (1) through bolts; a plurality of semicircular grooves (9-5) which correspond to each other in position up and down and form circular holes after combination are formed in the upper end of the lower centering plate (9-2) and the lower end plate surface of the upper centering plate (9-3), and two ends of a linear bearing (9-6) connected with the cutter bar (3) are rotatably installed in the two semicircular grooves (9-5) corresponding to the positions through bearings; two concentrically arranged positioning sleeves (9-7) are fixed on the two side plate surfaces of the connecting plate (9-4) on the lower centering plate (9-2), a rotary column (9-8) fixed at the lower end of the screw rod (9-9) is positioned between the two positioning sleeves (9-7), short shafts at two end parts of the rotating columns (9-8) are matched in the corresponding side positioning sleeves (9-7), u-shaped grooves (9-10) are formed on the plate surfaces at the two ends of a connecting plate (9-4) at the upper end of the upper centering plate (9-3), after the screw rod (9-9) rotates to the upper end to be matched in the U-shaped groove (9-10) and is matched and screwed with the locking nut (9-11) above the U-shaped groove (9-10), the lower centering plate (9-2) and the upper centering plate (9-3) clamp and fix the linear bearing (9-6).

3. The multi-tool stem pipe boring machine of claim 1, wherein: the rotary driving device (5) comprises a speed reducing motor (5-1) and a gear box (5-2), the speed reducing motor (5-1) and the gear box (5-2) are fixed on the bracket (4) through bolts, an output shaft of the speed reducing motor (5-1) is connected with an input shaft of the gear box (5-2) through a coupler, and a plurality of output shafts of the gear box (5-2) are fixedly connected with the right end of the corresponding cutter bar (3) through flange assemblies respectively.

4. The multi-tool stem pipe boring machine of claim 1, wherein: the feeding driving device (6) comprises a feeding motor (6-1), a gear (6-2) and a rack (6-3), a mounting plate (6-4) is fixed on one side wall of the bracket (4), the feeding motor (6-1) is fixed on the mounting plate (6-4) through a bolt, an output shaft of the feeding motor (6-1) penetrates through a through hole in the mounting plate (6-4) to be fixedly connected with the gear (6-2), the rack (6-3) is fixed on the side wall of the cutter bar rack (1) on the same side as the feeding motor (6-1), the gear (6-2) is meshed with the rack (6-3), and feeding movement of the bracket (4) along the length direction of the cutter bar rack (1) is achieved under the driving of the feeding motor (6-1).

5. The multi-tool stem pipe boring machine of claim 1, wherein: the locking and supporting device (8) comprises a door-shaped support (8-1), air cylinders (8-2) with the same number as that of workpieces (7), an upper clamping piece and a lower clamping piece, wherein the lower port of the door-shaped support (8-1) is arranged downwards and fixed on a workpiece rack (2), a plurality of air cylinders (8-2) corresponding to the upper and lower positions of the workpieces (7) are fixed on the inner top wall of the door-shaped support (8-1), the end part of a piston rod at the lower end of the air cylinder (8-2) is fixedly connected with the upper clamping piece, the lower clamping piece is fixed on a seat plate (8-3), the seat plate (8-3) is fixed on a cross beam of the workpiece rack (2) through bolts, the workpieces (7) are positioned between the upper clamping piece and the lower clamping piece, and the workpieces (7) are clamped or loosened by the upper clamping piece and the lower clamping piece through the expansion and contraction of the piston rod of the air cylinders (8-2), the center height of the workpiece (7) is adjusted by adding cushion plates with different thicknesses between the cross beam of the workpiece rack (2) and the seat plate (8-3) or arranging cushion blocks on the lower clamping piece.

6. The multi-tool stem pipe boring machine of claim 5, wherein: the upper clamping piece and the lower clamping piece both comprise V-shaped plates (8-4) and channel steel (8-5), notches of the V-shaped plates (8-4) are arranged in grooves of the channel steel (8-5) outwards, the two sides of the channel steel (8-5) are welded into a whole along the outer wall of the side corresponding to the V-shaped plates (8-4), the notches of the V-shaped plates (8-4) on the upper clamping piece and the lower clamping piece are arranged in opposite directions, and a workpiece (7) located between the two V-shaped plates (8-4) is driven by an air cylinder (8-2) to move upwards and downwards to clamp and fix the workpiece in the two V-shaped plates (8-4).

7. The multi-tool stem pipe boring machine of claim 6, wherein: the channel steel (8-5) in the lower clamping piece of the locking and supporting device (8) is a whole long channel steel.

8. The multi-spindle pipe boring machine of any one of claims 1 to 7, wherein: bracket (4) are the U-shaped structure, bracket (4) both sides wall lower extreme rotates to install and pastes gyro wheel (12) on cutter arbor frame (1) corresponds the side outer wall, cutter arbor frame (1) both sides avris upper end all is fixed with guide rail (11) that the cross-section is the I-shaped, gyro wheel (12) adaptation of rotation installation on bracket (4) both sides inner wall is in the guide slot in guide rail (11) outside to make bracket (4) remove along guide rail (11) length direction under the drive that feeds drive arrangement (6).

9. The multi-tool stem pipe boring machine of claim 8, wherein: the workpiece rack is characterized in that a circulating liquid pump (13) is fixed at the left end of the workpiece rack (2), the left end of the circulating liquid pump (13) is communicated with a liquid receiving disc (14) which is arranged at the right end of the workpiece rack (2) and is positioned below the boring end of the workpiece (7) through a pipeline, and the other end of the circulating liquid pump (13) is connected with a plurality of spray heads which are arranged at the boring end of the workpiece (7) corresponding to the orientation position and used for spraying cooling liquid into the boring of the workpiece (7).

Technical Field

The invention belongs to the technical field of inner hole machining, and particularly relates to a multi-cutter-rod pipe boring machine.

Background

The titanium has the characteristics of low density, high specific strength, seawater corrosion resistance, good low-temperature toughness and the like, and is widely applied to the fields of military industry, deep sea equipment, national defense technology and the like. Is recognized as a natural 'marine metal', and the seamless titanium/titanium alloy pipe has wider application prospect. At present, a titanium/titanium alloy bar is adopted to manufacture a seamless thick-wall pipe through the working procedures of drilling, boring and the like, and the processing of the seamless pipe with small length can be realized by adopting the processes of drilling, boring and the like, but when the seamless pipe is processed into a longer seamless pipe, because the processing precision requirement is higher and higher, the current boring equipment can not meet the processing requirement of the long seamless pipe, and the vibration and the noise are larger during the working, so that the precision of the hole wall after the processing is low, the surface roughness, the size and the geometric tolerance are difficult to ensure, and the size, the roundness and the cylindricity of the processed long seamless pipe are uncontrollable and the quality is unstable; the boring bar (the cutter bar) is connected by a rigid shaft, so that the defect of instability in the operation process exists, the cutter is jumped, and the processing precision is reduced; furthermore, due to the structural limitation of the boring equipment, the single boring bar is inefficient and expensive to process long seamless pipes, and therefore, there is a need for improvement.

Disclosure of Invention

The technical problems solved by the invention are as follows: the utility model provides a multi-cutter bar boring machine, support a plurality of cutter arbor in the cutter arbor frame through centering strutting arrangement, and be fixed in the work piece frame with the work piece locking that the cutter arbor is coaxial to be set up by the locking strutting arrangement, locate on the bracket and be used for driving cutter arbor pivoted rotary drive device and be used for driving the bracket along the drive of the feed drive device of feed direction removal, realize the bore hole processing of the unsteady boring cutter pair of a plurality of cutter arbor tip to corresponding work piece, the machining efficiency of seamless titanium pipe has greatly been improved, the stability and the reliability of supporting to work piece and cutter arbor have been improved, the vibration that has solved in the cutter arbor operation process and appears because of bearing structure is unstable, the drawback of jump sword, the machining precision of seamless titanium pipe has been improved, the processing cost is reduced, be convenient for the mass production of seamless titanium pipe.

The technical scheme adopted by the invention is as follows: the multi-cutter-bar boring machine comprises a cutter bar rack and a workpiece rack, wherein the workpiece rack is arranged on the left side of the cutter bar rack and corresponds to the cutter bar rack in an end-to-end manner, a plurality of cutter bars arranged above the cutter bar rack are arranged on the cutter bar rack through centering support devices fixed on the cutter bar rack, a bracket capable of moving along the length direction of the cutter bar rack is arranged on the cutter bar rack, a rotary driving device connected with the right ends of the cutter bars and used for driving the cutter bars to rotate is arranged on the bracket, and a feeding driving device connected with the side wall of the cutter bar rack and used for driving the bracket to move along the length direction of the cutter bar rack is arranged on the bracket; a plurality of workpieces which are arranged above the workpiece rack and are coaxial with the cutter bars at the corresponding positions are supported and fixed on the workpiece rack through a plurality of locking and supporting devices fixed on the workpiece rack, the cutter bars are driven by the rotary driving device to rotate and then the feed driving device drives the bracket to drive the cutter bars to feed towards the boring direction, and the floating boring cutter arranged at the end part of the cutter bar bores along the boring end of the workpiece.

The centering support device comprises a bottom plate, a lower centering plate and an upper centering plate, connecting plates are fixed at the lower end of the lower centering plate and the upper end of the upper centering plate, the connecting plate at the lower end of the lower centering plate is welded and fixed on the bottom plate, and the bottom plate is fixed on a cross rod of the cutter bar rack through bolts; the upper end of the lower centering plate and the lower end plate surface of the upper centering plate are respectively provided with a plurality of semicircular grooves which correspond to each other in position up and down and are combined to form a circular hole, and two ends of a linear bearing connected with the cutter bar are rotatably arranged in the two semicircular grooves corresponding to each other in position through bearings; two concentrically arranged positioning sleeves are fixed on two side plate surfaces of a connecting plate on the lower centering plate, a rotary column fixed at the lower end of a screw rod is positioned between the two positioning sleeves, short shafts at two end parts of the rotary column are adapted to the corresponding side positioning sleeves, U-shaped grooves are formed in two end plate surfaces of the connecting plate at the upper end of the upper centering plate, and the screw rod is rotated to the upper end to be adapted to the U-shaped grooves and is screwed with a locking nut above the U-shaped grooves, so that the linear bearing is clamped and fixed by the lower centering plate and the upper centering plate.

Further, the rotary driving device comprises a speed reducing motor and a gear box, the speed reducing motor and the gear box are fixed on the bracket through bolts, an output shaft of the speed reducing motor is connected with an input shaft of the gear box through a coupler, and a plurality of output shafts of the gear box are fixedly connected with the right end of the corresponding cutter bar through flange assemblies respectively.

Further, feed drive arrangement includes feed motor, gear and rack, be fixed with the mounting panel on the bracket lateral wall, feed motor passes through the bolt fastening on the mounting panel, and feed motor output shaft passes through-hole and gear fixed connection on the mounting panel, the rack is fixed in with the cutter arbor frame lateral wall of feed motor homonymy on, gear and rack meshing to realize the feed motion of bracket along cutter arbor frame length direction under the drive of feed motor.

Furthermore, the locking and supporting device comprises a door-shaped support, a plurality of air cylinders, an upper clamping piece and a lower clamping piece, the number of the air cylinders is the same as that of the workpieces, a lower port of the door-shaped support is arranged downwards and fixed on a workpiece rack, the air cylinders corresponding to the upper and lower positions of the workpieces are fixed on the inner top wall of the door-shaped support, the end part of a piston rod at the lower end of each air cylinder is fixedly connected with the upper clamping piece, the lower clamping piece is fixed on a seat plate, the seat plate is fixed on a cross beam of the workpiece rack through bolts, the workpieces are located between the upper clamping piece and the lower clamping piece, the upper clamping piece and the lower clamping piece clamp or release the workpieces through the expansion and contraction of the piston rods of the air cylinders, and the center height of the workpieces is adjusted by adding base plates with different thicknesses between the cross beam of the workpiece rack and the seat plate or arranging cushion blocks on the lower clamping piece.

Further, go up clamping piece and lower clamping piece and all include V template and channel-section steel, V template notch is located in the recess of channel-section steel outwards, the channel-section steel both sides are as an organic whole along corresponding the side outer wall welding with the V template, go up the V template notch on clamping piece and the lower clamping piece and set up in opposite directions, and the work piece that is located between two V templates passes through cylinder drive and goes up the clamping piece and move down the back and realize the clamp fastening in two V templates.

Further, the channel steel in the lower clamping pieces of the locking and supporting devices is a whole piece of long channel steel.

Further, the bracket is the U-shaped structure, bracket both sides wall lower extreme rotates to install and pastes the gyro wheel on the cutter arbor frame corresponds the lateral wall, both long avris upper ends of cutter arbor frame are fixed with the guide rail that the cross-section is the I-shaped, rotate the gyro wheel adaptation of installation on the inner wall of bracket both sides in the guide slot in the guide rail outside to make the bracket remove along guide rail length direction under the drive that feeds drive arrangement.

Furthermore, a circulating liquid pump is fixed at the left end of the workpiece rack, the left end of the circulating liquid pump is communicated with a liquid receiving disc which is arranged at the right end of the workpiece rack and is positioned below the boring end of the workpiece through a pipeline, and the other end of the circulating liquid pump is connected with a plurality of spray heads which are arranged at the boring end of the workpiece facing the corresponding position and are used for spraying cooling liquid into the boring hole of the workpiece.

Compared with the prior art, the invention has the advantages that:

1. according to the technical scheme, the plurality of cutter bars are supported on the cutter bar rack through the centering support device, the workpiece which is coaxially arranged with the cutter bars is locked and fixed on the workpiece rack through the locking support device, and the floating boring cutters at the end parts of the cutter bars are used for boring the corresponding workpiece under the driving of the rotary driving device which is arranged on the bracket and used for driving the cutter bars to rotate and the feeding driving device which is used for driving the bracket to move along the feeding direction, so that the processing efficiency of the seamless titanium tube is greatly improved, the stability and the reliability of supporting the workpiece and the cutter bars are improved, and the defects of vibration and cutter jumping caused by unstable support structures in the operation process of the cutter bars are overcome;

2. according to the technical scheme, after the rotary motion of the rotary driving device for driving the lower cutter bars by the plurality of cutter bars and the feed motion of the feed driving device for driving the lower cutter bars by the bracket are combined, continuous boring processing of a plurality of workpieces is realized, the processing efficiency of the seamless titanium tube is high, and the quality of the inner wall of the formed seamless titanium tube is ensured;

3. according to the technical scheme, the cutter bar on the cutter bar rack is supported by the centering support device formed by the bottom plate, the lower centering plate, the upper centering plate, the screw rod and the linear bearings which are connected with the cutter bar and rotatably installed in the two semicircular grooves, so that the running stability of the cutter bar during feeding motion is greatly improved, and stable support conditions are provided for boring of the cutter bar;

4. according to the technical scheme, after the cylinder with the lower end piston rod fixedly connected with the upper clamping piece drives the upper clamping piece to lift, the upper clamping piece and the lower clamping piece clamp and fix a workpiece, the position precision of the workpiece in a boring process is guaranteed, and the center height of the workpiece is adjusted by adding base plates with different thicknesses between a cross beam and a base plate of a workpiece rack or arranging a cushion block on the lower clamping piece, so that the seamless titanium tubes with different sizes are processed, and the processing range is large;

5. the technical scheme has the advantages of simple structure, stable and reliable operation, simple maintenance and high seamless titanium pipe processing efficiency, improves the processing precision of the seamless titanium pipe, reduces the processing cost and is convenient for the batch production of the seamless titanium pipe.

Drawings

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is a top view of the structure of the present invention;

FIG. 3 is a front view of the configuration of the centering and support device of the present invention;

FIG. 4 is a top view of the configuration of the centering and support device of the present invention;

FIG. 5 is a schematic view of the locking support device of the present invention;

fig. 6 is a schematic view of the mounting structure of the bracket and the tool bar frame and the feeding driving device and the bracket of the invention.

Detailed Description

In the following, an embodiment of the present invention will be described in conjunction with fig. 1 to 6, so as to clearly and completely describe the technical solutions, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, not the whole embodiment.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

A multi-cutter bar boring machine, as shown in fig. 1-2, including a cutter bar frame 1 and a workpiece frame 2 corresponding to the cutter bar frame 1 from head to tail and disposed on the left side of the cutter bar frame 1, wherein a plurality of cutter bars 3 disposed above the cutter bar frame 1 are mounted on the cutter bar frame 1 through centering and supporting devices 9 fixed on the cutter bar frame 1, a bracket 4 movable along the length direction of the cutter bar frame 1 is disposed on the cutter bar frame 1, a rotary driving device 5 connected to the right ends of the cutter bars 3 and used for driving the cutter bars 3 to rotate is disposed on the bracket 4, and a feed driving device 6 connected to the side wall of the cutter bar frame 1 and used for driving the bracket 4 to move along the length direction of the cutter bar frame 1 is disposed on the bracket 4; a plurality of workpieces 7 which are coaxially arranged with the cutter bars 3 at the corresponding positions above the workpiece rack 2 are supported and fixed on the workpiece rack 2 through a plurality of locking and supporting devices 8 fixed on the workpiece rack 2, and a plurality of cutter bars 3 are driven by a rotary driving device 5 to rotate and then a bracket 4 is driven by a feeding driving device 6 to drive the cutter bars 3 to feed towards the boring direction, so that a floating boring cutter 10 arranged at the end part of the cutter bar 3 bores along the boring end of the workpiece 7; in the structure, a plurality of cutter bars 3 are supported on a cutter bar rack 1 through a centering support device 9, a workpiece 7 which is coaxially arranged with the cutter bars 3 is locked and fixed on a workpiece rack 2 through a locking support device 8, and under the driving of a rotary driving device 5 which is arranged on a bracket 4 and is used for driving the cutter bars 3 to rotate and a feeding driving device 6 which is used for driving the bracket 4 to move along the feeding direction, the boring of the corresponding workpiece 7 by floating boring cutters 10 at the end parts of the cutter bars 3 is realized, the processing efficiency of a seamless titanium tube is greatly improved, the stability and the reliability of supporting the workpiece 7 and the cutter bars 3 are improved, and the defects of vibration and cutter jumping caused by unstable support structures in the operation process of the cutter bars 3 are overcome; after the rotary driving device 5 compounds the rotary motion of the lower cutter bars 3 driven by the cutter bars 3 with the feed motion of the lower cutter bars 3 driven by the feed driving device 6 on the bracket 4, the continuous boring processing of a plurality of workpieces 7 is realized, the processing efficiency of the seamless titanium tube (the seamless titanium tube is obtained after the workpieces 7 are processed and formed) is high, and meanwhile, the quality of the inner wall of the formed seamless titanium tube is ensured;

as shown in fig. 3 to 4, the specific structure of the centering and supporting device 9 is as follows: the centering and supporting device 9 comprises a bottom plate 9-1, a lower centering plate 9-2 and an upper centering plate 9-3, connecting plates 9-4 are fixed at the lower end of the lower centering plate 9-2 and the upper end of the upper centering plate 9-3, the connecting plate 9-4 at the lower end of the lower centering plate 9-2 is welded and fixed on the bottom plate 9-1, and the bottom plate 9-1 is fixed on a cross bar of the cutter bar rack 1 through bolts; a plurality of semicircular grooves 9-5 which correspond to each other in position up and down and form circular holes after being combined are formed in the upper end of the lower centering plate 9-2 and the lower end plate surface of the upper centering plate 9-3, and two ends of a linear bearing 9-6 connected with the cutter bar 3 are rotatably arranged in the two semicircular grooves 9-5 corresponding to each other in position through bearings; two concentrically arranged positioning sleeves 9-7 are fixed on two side plate surfaces of a connecting plate 9-4 on the lower centering plate 9-2, a rotating column 9-8 fixed at the lower end of a screw rod 9-9 is positioned between the two positioning sleeves 9-7, short shafts at two end parts of the rotating column 9-8 are adapted to corresponding side positioning sleeves 9-7, U-shaped grooves 9-10 are formed on two end plate surfaces of the connecting plate 9-4 at the upper end of the upper centering plate 9-3, and after the screw rod 9-9 rotates to the upper end to be adapted to the U-shaped grooves 9-10 and is adapted and screwed with a locking nut 9-11 above the U-shaped grooves 9-10, the lower centering plate 9-2 and the upper centering plate 9-3 clamp and fix the linear bearing 9-6; in the structure, the cutter bar 3 on the cutter bar rack 1 is supported by the centering support device 9 formed by the bottom plate 9-1, the lower centering plate 9-2, the upper centering plate 9-3, the screw rod 9-9 and the linear bearing 9-6 which is connected with the cutter bar 3 and rotatably arranged in the two semicircular grooves 9-5, so that the running stability of the cutter bar 3 during the feeding motion is greatly improved, and a stable support condition is provided for the boring processing of the cutter bar 3;

the specific structure of the rotation driving device 5 is as follows: the rotary driving device 5 comprises a speed reducing motor 5-1 and a gear box 5-2, the speed reducing motor 5-1 and the gear box 5-2 are fixed on the bracket 4 through bolts, an output shaft of the speed reducing motor 5-1 is connected with an input shaft of the gear box 5-2 through a coupler, and a plurality of output shafts of the gear box 5-2 are fixedly connected with the right end of the corresponding cutter bar 3 through flange assemblies respectively.

As shown in fig. 6, the specific structure of the feed driving device 6 is as follows: the feeding driving device 6 comprises a feeding motor 6-1, a gear 6-2 and a rack 6-3, a mounting plate 6-4 is fixed on one side wall of the bracket 4, the feeding motor 6-1 is fixed on the mounting plate 6-4 through a bolt, an output shaft of the feeding motor 6-1 penetrates through a through hole in the mounting plate 6-4 to be fixedly connected with the gear 6-2, the rack 6-3 is fixed on the side wall of the cutter bar rack 1 on the same side with the feeding motor 6-1, the gear 6-2 is meshed with the rack 6-3, and feeding movement of the bracket 4 along the length direction of the cutter bar rack 1 is realized under the driving of the feeding motor 6-1.

As shown in fig. 5, the specific structure of the locking support device 8 is as follows: the locking and supporting device 8 comprises a door-shaped support 8-1, air cylinders 8-2 with the same number as that of workpieces 7, an upper clamping piece and a lower clamping piece, a lower port of the door-shaped support 8-1 is arranged downwards and fixed on the workpiece rack 2, the air cylinders 8-2 corresponding to the workpieces 7 in the upper and lower positions are fixed on the inner top wall of the door-shaped support 8-1, the end part of a piston rod at the lower end of the air cylinder 8-2 is fixedly connected with the upper clamping piece, the lower clamping piece is fixed on a seat plate 8-3, the seat plate 8-3 is fixed on a cross beam of the workpiece rack 2 through bolts, the workpieces 7 are positioned between the upper clamping piece and the lower clamping piece, the clamping or the loosening of the workpieces 7 by the upper clamping piece and the lower clamping piece are realized through the expansion and contraction of the piston rod of the air cylinder 8-2, and the center height of the workpieces 7 is realized through adding cushion plates with different thicknesses between the cross beam of the workpiece rack 2 and the seat plate 8-3 or through the lower clamping piece The piece is provided with a cushion block for adjustment; specifically, the specific structure of the upper clamping piece and the lower clamping piece is as follows: the upper clamping piece and the lower clamping piece both comprise V-shaped plates 8-4 and channel steel 8-5, notches of the V-shaped plates 8-4 are arranged in grooves of the channel steel 8-5 outwards, two sides of the channel steel 8-5 are welded into a whole along the outer wall of the side corresponding to the V-shaped plates 8-4, the notches of the V-shaped plates 8-4 on the upper clamping piece and the lower clamping piece are arranged oppositely, and a workpiece 7 positioned between the two V-shaped plates 8-4 drives the upper clamping piece to move downwards through an air cylinder 8-2 so as to realize clamping and fixing in the two V-shaped plates 8-4; specifically, channel steel 8-5 in the lower clamping pieces of the locking and supporting devices 8 is a whole long channel steel; in the structure, after the cylinder 8-2 fixedly connected with the upper clamping piece and the piston rod at the lower end is adopted to drive the upper clamping piece to lift, the upper clamping piece and the lower clamping piece are used for clamping and fixing the workpiece 7, the position precision of the workpiece in the boring process is ensured, the problem that the boring precision in the workpiece 7 is influenced due to the unreliable fixed position of the workpiece 7 is avoided, and the center height of the workpiece 7 is adjusted by adding base plates with different thicknesses between the cross beam of the workpiece rack 2 and the seat plate 8-3 or arranging a cushion block on the lower clamping piece, so that the processing of seamless titanium pipes with different sizes is met, and the processing range is large;

as shown in fig. 6, the mounting structure of the bracket 4 on the arbor frame 1 is as follows: bracket 4 is the U-shaped structure, 4 both sides wall lower extremes of bracket rotate and install and paste gyro wheel 12 on the outer wall of 1 corresponding side of cutter arbor frame, 1 two long avris upper ends of cutter arbor frame all are fixed with the guide rail 11 that the cross-section is the I-shaped, rotate gyro wheel 12 adaptation of installation on the inner wall of 4 both sides of bracket in the guide slot in the guide rail 11 outside to make bracket 4 remove along 11 length direction of guide rail under the drive that feeds drive arrangement 6.

In order to facilitate cooling, lubricating and chip removal of the workpiece 7 in the boring process, a cooling liquid circulation structure is specially arranged, and the structure is as follows: a circulating liquid pump 13 is fixed at the left end of the workpiece rack 2, the left end of the circulating liquid pump 13 is communicated with a liquid receiving disc 14 which is arranged at the right end of the workpiece rack 2 and is positioned below the boring end of the workpiece 7 through a pipeline, and the other end of the circulating liquid pump 13 is connected with a plurality of spray heads which are arranged at the boring end of the workpiece 7 facing the corresponding position and are used for spraying cooling liquid into the boring of the workpiece 7.

The technical scheme has the advantages of simple structure, stable and reliable operation, simple maintenance and high seamless titanium pipe processing efficiency, improves the processing precision of the seamless titanium pipe, reduces the processing cost and is convenient for the batch production of the seamless titanium pipe.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.