CN113414631A - Long-shaft deep hole drilling device and method for discharging chips from circulating water - Google Patents

Abstract

The invention relates to a long-axis deep hole drilling device and method for discharging chips from circulating water, wherein the device comprises a lathe, a deep hole drill bit, a water inlet unit and a water discharging unit; the water inlet unit consists of a water inlet device and a first feeding device, and the water drainage unit consists of a water drainage pipe and a second feeding device; the water inlet device comprises a shell, a rotary water inlet cylinder, a front end sleeve and a wedge-shaped sealing sleeve; the first feeding device and the second feeding device can both move along the longitudinal direction of the lathe in a feeding mode. The invention simplifies the drilling process, has good effect on drilling deep holes on long-shaft parts, and can ensure the precision, coaxiality and roughness of the inner surface of the hole; the problem of the leakproofness in current deep hole drilling equipment circulation water route is improved, chip removal ability when having improved drilling greatly.

Description

Long-shaft deep hole drilling device and method for discharging chips from circulating water

Technical Field

The invention relates to the technical field of deep hole machining, in particular to a device and a method for a long-shaft deep hole drill capable of discharging chips by circulating water.

Background

Drilling is one of basic processing modes in machine manufacturing, common drilling equipment comprises three types, namely a bench drilling machine, an upright drilling machine and a radial drilling machine, and in addition, an electric hand drill is also a common drilling tool. With the development of mechanical equipment, higher requirements are put forward on the precision and the depth of drilling, and in order to meet the requirements of higher precision and limit drilling working conditions, deep hole drilling processing is gradually developed in mechanical manufacturing. However, most of the existing deep hole processing equipment needs to drill a guide hole before processing, the water circulation sealing performance is poor, the working procedures are complicated, and the processing technology requirements of large-size and high-precision workpieces cannot be met. In view of the above problems, it is necessary to develop a long-axis deep hole drilling device using a circulating water discharge method and a drilling method based on the same.

The Chinese utility model patent with publication number CN 204366102U discloses a turning deep hole drilling device, which comprises a lathe chuck, a tool rest, a clamp, a deep hole drill, a support seat, a high-pressure water gun, a positioning seat and a pressing block, wherein the clamp is positioned at the center of the front end of the lathe chuck and is movably connected with the lathe chuck; the deep hole drill bit is positioned at the center of the interior of the clamping device and is movably connected with the deep hole drill bit; the support seat is positioned at the center of the right side of the upper end of the tool rest and is connected with the tool rest through threads; the high-pressure water gun is positioned at the rear side of the center of the upper end of the tool rest and is in threaded connection with the tool rest; the positioning seat is positioned at the center of the upper end of the tool rest and is connected with the tool rest through threads; the pressing block is positioned at the center of the upper end of the positioning seat and is connected with the positioning seat through threads. The device passes through the binding clasp with the deep-hole drill clamping on lathe main shaft, supports the deep-hole drill bit at the supporting seat and keeps one line, slowly feeds through the knife rest and comes the processing hole to guarantee the precision, avoid the work piece to scrap, improve production efficiency. However, the device does not describe the specific structure of the deep hole drill bit, the mode of chip removal treatment by using a high-pressure water gun is difficult to realize in practical application, the chip removal effect is poor, and metal chips remained between a drill rod and a drill hole easily scratch the surface of a workpiece hole.

The utility model discloses a chinese utility model patent that bulletin number is CN 209157220U discloses "deep hole processingequipment", including lathe bed, drilling unit head, deep hole drill bit, workstation, work piece, electromagnetism rectifying device, anchor clamps, laser emitter, lead screw nut mechanism, the device the lathe bed on be equipped with the drilling unit head, the deep hole drill bit is installed on the drilling unit head, the workstation passes through guide rail slidable mounting on the lathe bed, still is connected through lead screw nut mechanism between workstation and the lathe bed, the work piece centre gripping is on the workstation. And the device is also provided with a laser auxiliary calibration device and an electromagnetic deviation rectifier. Using laser to punch a correction hole at the position of a workpiece and a hole to be processed; the laser beam emitted by the laser emitting device falls on the photoelectric collector, and the offset of the deep hole drill bit is corrected in real time by the electromagnetic deviation corrector. Through adopting above scheme, simplified the structure, be favorable to improving the machining precision, the supplementary calibrating device of laser that sets up can realize online precision calibration, according to the shape change of collimation laser and the position that drops on difference on photoelectric acquisition ware, can discover the skew error in real time. The electromagnetic deviation rectifier can correct the deviation of the deep hole drill bit in real time, and machining precision is further improved. The device adopts the drill bit rotating mode to process, and because the deep hole drill bit is longer in length, the deep hole drill bit is easy to jump, thereby influencing the requirements of the size and the surface roughness of a drilled hole; and the specific structure of the deep hole drill bit is not explained, and the problem of chip removal of the deep hole drill bit is still not solved.

Disclosure of Invention

The invention provides a device and a method for drilling a long-shaft deep hole for discharging chips by circulating water, which simplify the drilling process, have good effect on drilling a deep hole on a long-shaft part, and can ensure the precision, coaxiality and roughness of the inner surface of the hole; the problem of the leakproofness in current deep hole drilling equipment circulation water route is improved, chip removal ability when having improved drilling greatly.

In order to achieve the purpose, the invention adopts the following technical scheme:

a long-shaft deep hole drilling device for discharging chips from circulating water comprises a lathe, a deep hole drill bit, a water inlet unit and a water discharging unit; the water inlet unit consists of a water inlet device and a first feeding device, and the water drainage unit consists of a water drainage pipe and a second feeding device; the water inlet device is arranged on the first feeding device, and a drain pipe channel is arranged on the water inlet device for a drain pipe to pass through; the water inlet device comprises a shell, a rotary water inlet cylinder, a front end sleeve and a wedge-shaped sealing sleeve; the shell is provided with a water inlet pipe, and the inner side of the shell at the corresponding part is a water inlet area; the rotary water inlet cylinder is arranged in the shell and can rotate relative to the shell and the drain pipe; the part of the rotary water inlet cylinder corresponding to the water inlet area is provided with a jacket structure, a plurality of water inlet holes are arranged in the jacket structure and communicated with the water inlet area, and the jacket structure is connected with the shell in a sealing way; a front end sleeve and a wedge-shaped sealing sleeve are arranged at one end of the rotary water inlet cylinder, which is close to a spindle box of a lathe, and a gap is reserved between the surface of an inner hole of the front end sleeve and the outer surface of the deep hole drill bit to serve as a water inlet passage; an axial drainage channel is arranged in the deep hole drill bit, the jacket structure is communicated with the axial drainage channel through an internal water inlet channel, and the axial drainage channel is connected with one end of a drainage pipe; the other end of the water discharge pipe passes through a water discharge pipe channel in the water inlet device and then is connected with the feeding device II; the first feeding device and the second feeding device can both move along the longitudinal direction of the lathe in a feeding mode.

The lathe comprises a lathe body, a first lathe leg, a second lathe leg, a spindle box and a three-jaw chuck; the two ends of the lathe bed are respectively supported by the first lathe leg and the second lathe leg, a main spindle box is arranged at the top of one end of the lathe bed, an output shaft of the main spindle box is connected with a three-jaw chuck, and a lathe bed guide rail is longitudinally arranged on the lathe bed.

The rotary water inlet cylinder consists of a connecting sleeve and a supporting sleeve, and the middle part of the supporting sleeve is provided with a jacket structure; the outer surface of the front end of the support sleeve close to the connecting sleeve is rotationally connected with the shell through a bearing, and the outer surface of the rear end of the support sleeve is rotationally connected with the shell through a bearing II; the inner surface of the front end of the support sleeve is rotationally connected with the drain pipe through a bearing III, and the inner surface of the rear end of the support sleeve is rotationally connected with the drain pipe through a bearing IV; the shell corresponding to one end of the support sleeve is of a closed structure, the other end of the shell is closed through a blocking cover, and the blocking cover and the shell are fixed through screws; a first sealing check ring is arranged between the jacket structure and the first bearing, and a second sealing check ring is arranged between the jacket structure and the second bearing; an internal water inlet channel is arranged in the support sleeve; the connecting sleeve is fixedly connected with the front end sleeve through a screw.

The first bearing and the second bearing are both sealing sliding bearings, and the third bearing and the fourth bearing are both sealing rolling bearings.

The inlet opening is the rectangular hole, is the even setting of multirow multiseriate on jacket structure's outer wall.

The deep hole drill bit comprises a drill bit body, a first cutting knife, a second cutting knife, a third cutting knife, a first guide block and a second guide block; the drill bit body is divided into a cutting end and a connecting end, the cutting end is provided with 2 cutting parts, a first cutting knife is arranged on a main cutting edge of one cutting part, and a first guide block is arranged on the outer side of the main cutting edge; a second cutting knife and a third cutting knife are arranged on the main cutting edge of the other cutting part along the radial direction, and a second guide block is arranged on the outer side of the main cutting edge; the 2 cutting parts are connected with the part corresponding to the center of the drill body, and axial drainage channels are respectively arranged among the 2 cutting parts; the connecting end is connected with the corresponding end of the water drainage pipe through threads.

The vertex angle of the drill bit body is 150-170 degrees.

The first feeding device is composed of a first feeding frame, a transverse sliding plate, a first hand wheel, a first fixing seat and a transverse adjusting hand wheel, a sliding groove matched with a guide rail of the lathe body is formed in the bottom of the first feeding frame, the first hand wheel is in meshing transmission with racks on the corresponding side of the lathe body through a gear transmission mechanism, and the first feeding frame is fed along the longitudinal direction of the lathe body; a transverse sliding plate is arranged on the feeding frame I, the transverse sliding plate is in sliding connection with the feeding frame I through a screw rod mechanism, and the transverse sliding plate moves along the transverse direction of the lathe bed through a transverse adjusting hand wheel; the first fixing seat is arranged on the transverse sliding plate and used for fixing the water inlet device.

The feeding device II consists of a feeding frame II, a hand wheel II, a fixing seat II and a locking mechanism; the bottom of the feeding frame II is provided with a sliding chute matched with a guide rail of the lathe bed, and the hand wheel II is in meshing transmission with a rack on the corresponding side of the lathe bed through a gear transmission mechanism and realizes the feeding motion of the feeding frame II along the longitudinal direction of the lathe bed; the second fixing seat is arranged on the second feeding frame, a through hole is formed in the second fixing seat, and the drain pipe penetrates through the through hole and is locked and fixed through the locking mechanism.

A method for drilling a long-shaft deep hole by discharging chips from circulating water comprises the following steps:

1) a workpiece to be drilled is installed and clamped in a three-jaw chuck of a lathe, a drain pipe penetrates through the second fixing seat and the water inlet device and then is connected with a deep hole drill bit, and the position of the water inlet device is adjusted through a transverse adjusting hand wheel so that the deep hole drill bit and the rotary water inlet cylinder are coaxial with the workpiece;

2) the lathe is started, the three-jaw chuck drives the workpiece to rotate, and the hand wheel I and the hand wheel II are shaken simultaneously to drive the water inlet device, the deep hole drill bit and the drain pipe to feed simultaneously;

3) after the deep hole drill bit is contacted with the end face of the workpiece, water is supplied to the water inlet device through the water inlet pipe; after the drilling operation is started, water flows into a water inlet area of the water inlet device from the water inlet pipe, flows through a water inlet hole in the jacket structure, and is conveyed to the front end of the deep-hole drill bit through an internal water inlet channel in the jacket structure;

4) when the wedge-shaped sealing sleeve enters a hole drilled by the deep hole drill bit and is tightly contacted with the hole wall, stopping shaking the first hand wheel; in the subsequent drilling operation, the wedge-shaped sealing sleeve is driven by the workpiece, and then the rotary water inlet cylinder is driven to rotate by the front end sleeve;

5) after the drilling operation is finished, reversely shaking the hand wheel II to drive the deep hole drill bit to withdraw from the workpiece through the drain pipe, and simultaneously stopping supplying water into the water inlet device; and then reversely shaking the first hand wheel to enable the water inlet device to be far away from the workpiece, stopping the lathe, and detaching the drilled workpiece from the three-jaw chuck.

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

1) the drilling process is simplified, the deep hole drilling effect on long-shaft parts is good, and the drilling precision, the coaxiality and the roughness of the inner surface of the hole can be guaranteed;

2) the problem of the leakproofness in current deep hole drilling equipment circulation water route is improved, chip removal ability when having improved drilling greatly.

Drawings

Fig. 1 is a schematic perspective view of a long-axis deep hole drilling device according to the first embodiment of the invention.

Fig. 2 is a schematic perspective view (partially cut away) of the long-axis deep hole drilling device according to the present invention.

Fig. 3 is an enlarged view of a portion i in fig. 2.

FIG. 4 is a schematic view showing the connection of the deep hole drill, the water intake device and the water discharge pipe according to the present invention.

Fig. 5 is a cross-sectional view of fig. 4.

Fig. 6 is a sectional view of the water inlet device according to the present invention.

Fig. 7 is a schematic flow diagram of circulating water in the long-axis deep-hole drilling device according to the invention.

Fig. 8 is a perspective view of the deep hole drill according to the present invention.

In the figure: 1. the spindle box 2, the first lathe leg 3, the second lathe leg 4, the three-jaw chuck 5, the workpiece 6, the first fixing seat 7, the water inlet device 8, the water outlet pipe 9, the locking mechanism 10, the second fixing seat 11, the first lathe bed 12, the first feeding frame 13, the second feeding frame 14, the drill bit body 15, the front end sleeve 16, the rotary water inlet cylinder 17, the wedge-shaped sealing sleeve 18, the water inlet pipe 19, the baffle cover 20, the first screw 21, the second screw 22, the first guide block 23, the first cutting knife 24, the second cutting knife 25, the second guide block 26, the third cutting knife 27, the first bearing 28, the first sealing retainer 29, the second bearing 30, the second sealing retainer 31, the snap ring 32, the third bearing 33, the third sealing retainer 34, the internal water inlet channel 35, the fourth bearing 36, the shell 37, the third screw 38, the first hand wheel 40, the second hand wheel 41 and the transverse adjusting hand wheel.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings:

as shown in fig. 1 and 2, the long-axis deep hole drilling device for discharging chips by circulating water comprises a lathe, a deep hole drill, a water inlet unit and a water discharge unit; the water inlet unit consists of a water inlet device 7 and a first feeding device, and the water drainage unit consists of a water drainage pipe 8 and a second feeding device; the water inlet device 7 is arranged on the first feeding device, and as shown in fig. 3 and 4, a drain pipe channel is arranged on the water inlet device 7 for a drain pipe 8 to pass through; the water inlet device 7 comprises a shell 36, a rotary water inlet cylinder 16, a front end sleeve 15 and a wedge-shaped sealing sleeve 17; the shell 36 is provided with a water inlet pipe 18, and the inner side of the shell 36 at the corresponding part is a water inlet area; the rotary water inlet cylinder 16 is arranged in the shell 36 and can rotate relative to the shell 36 and the water outlet pipe 8; the part of the rotary water inlet cylinder 16 corresponding to the water inlet area is provided with a jacket structure, a plurality of water inlet holes are arranged in the jacket structure and communicated with the water inlet area, and the jacket structure is hermetically connected with the shell 36; a front end sleeve 15 and a wedge-shaped sealing sleeve 17 are arranged at one end of the rotary water inlet cylinder 16 close to a spindle box 1 of a lathe, and a gap is reserved between the surface of an inner hole of the front end sleeve 15 and the outer surface of a deep hole drill bit to serve as a water inlet passage; an axial drainage channel is arranged in the deep hole drill bit, the jacket structure is communicated with the axial drainage channel through an internal water inlet channel 34, and the axial drainage channel is additionally connected with one end of a drainage pipe 8; the other end of the drain pipe 8 passes through a drain pipe channel in the water inlet device 7 and then is connected with the feeding device II; the first feeding device and the second feeding device can both move along the longitudinal direction of the lathe in a feeding mode.

The lathe comprises a lathe body 11, a first lathe leg 2, a second lathe leg 3, a spindle box 1 and a three-jaw chuck 4; the two ends of the lathe bed 11 are respectively supported by the first lathe leg 2 and the second lathe leg 3, the top of one end of the lathe bed 11 is provided with a main spindle box 1, an output shaft of the main spindle box 1 is connected with a three-jaw chuck 4, and a lathe bed guide rail is arranged on the lathe bed 11 along the longitudinal direction.

As shown in fig. 5 and 6, the rotary water inlet barrel 16 is composed of a connecting sleeve and a supporting sleeve, and the middle part of the supporting sleeve is provided with a jacket structure; the outer surface of the front end of the support sleeve close to the connecting sleeve is rotatably connected with the shell through a first bearing 27, and the outer surface of the rear end of the support sleeve is rotatably connected with the shell 36 through a second bearing 29; the inner surface of the front end of the support sleeve is rotationally connected with the drain pipe 8 through a third bearing 32, and the inner surface of the rear end of the support sleeve is rotationally connected with the drain pipe 8 through a fourth bearing 35; the shell 36 corresponding to one end of the support sleeve is of a closed structure, the other end of the shell 36 is closed through the blocking cover 19, and the blocking cover 19 and the shell 36 are fixed through the screw 20; a first sealing retainer ring 28 is arranged between the jacket structure and the first bearing 27, and a second sealing retainer ring 30 is arranged between the jacket structure and the second bearing 29; an internal water inlet channel 34 is arranged in the clamping and supporting sleeve; the connecting sleeve is fixedly connected with the front end sleeve 15 through a screw 21.

The first bearing 27 and the second bearing 29 are both sealed sliding bearings, and the third bearing 29 and the fourth bearing 35 are both sealed rolling bearings.

The inlet opening is the rectangular hole, is the even setting of multirow multiseriate on jacket structure's outer wall.

As shown in fig. 8, the deep hole drill comprises a drill body 14, a first cutting blade 23, a second cutting blade 24, a third cutting blade 26, a first guide block 22 and a second guide block 25; the drill bit body 14 is divided into a cutting end and a connecting end, the cutting end is provided with 2 cutting parts, a first cutting blade 23 is arranged on a main cutting edge of one cutting part, and a first guide block 22 is arranged on the outer side of the main cutting blade; a second cutting blade 24 and a third cutting blade 26 are arranged on the main cutting edge of the other cutting part along the radial direction, and a second guide block 25 is arranged on the outer side of the main cutting edge; the 2 cutting parts are connected with the part corresponding to the center of the drill bit body 14, and axial drainage channels are respectively arranged among the 2 cutting parts; said connection end being connected to the corresponding end of the drain pipe 8 by means of threads 38.

The vertex angle of the drill bit body 14 is 150-170 degrees.

The first feeding device consists of a first feeding frame 12, a transverse sliding plate, a first hand wheel 39, a first fixed seat 6 and a transverse adjusting hand wheel 41, a sliding groove matched with a guide rail of the machine body is formed in the bottom of the first feeding frame 12, the first hand wheel 39 is in meshing transmission with a rack on the corresponding side of the machine body 11 through a gear transmission mechanism, and the feeding motion of the first feeding frame 12 along the longitudinal direction of the machine body 11 is realized; a transverse sliding plate is arranged on the feeding frame I12, the transverse sliding plate is in sliding connection with the feeding frame I12 through a screw rod mechanism, and the transverse sliding plate moves along the transverse direction of the lathe bed 11 through a transverse adjusting hand wheel 41; the first fixing seat 6 is arranged on the transverse sliding plate and used for fixing the water inlet device 7.

The feeding device II consists of a feeding frame II 13, a hand wheel II 40, a fixing seat II 10 and a locking mechanism 9; the bottom of the second feeding frame 13 is provided with a sliding chute matched with a guide rail of the bed body, and the second hand wheel 40 is in meshing transmission with a rack on the corresponding side of the bed body 11 through a gear transmission mechanism, so that the feeding motion of the second feeding frame 13 along the longitudinal direction of the bed body 11 is realized; the second fixing seat 10 is arranged on the second feeding frame 13, a pipe penetrating hole is formed in the second fixing seat 10, and the drain pipe 8 penetrates through the pipe penetrating hole and is locked and fixed through the locking mechanism 9.

A method for drilling a long-shaft deep hole by discharging chips from circulating water comprises the following steps:

1) a workpiece 5 to be drilled is clamped in a three-jaw chuck 4 of a lathe, a drain pipe 8 penetrates through a second fixed seat 10 and a water inlet device 7 and then is connected with a deep hole drill bit, and the position of the water inlet device 7 is adjusted through a transverse adjusting hand wheel 41, so that the deep hole drill bit and a rotary water inlet cylinder 16 are coaxial with the workpiece 5;

2) when the lathe is started, the three-jaw chuck 4 drives the workpiece 5 to rotate, and simultaneously shakes the first hand wheel 39 and the second hand wheel 40 to drive the water inlet device 7, the deep hole drill bit and the drain pipe 8 to feed simultaneously;

3) after the deep hole drill bit is contacted with the end surface of the workpiece 5, water is supplied to the water inlet device 7 through the water inlet pipe 18; after the drilling operation is started, water flows into a water inlet area of the water inlet device from the water inlet pipe, flows through a water inlet hole in the jacket structure, and is conveyed to the front end of the deep-hole drill bit through an internal water inlet channel 34 in the jacket structure, and because the wedge-shaped sealing sleeve 17 is in sealing fit with the hole wall of the drilled hole, water can only enter the drain pipe 8 through an axial drain channel of the deep-hole drill bit, and metal chips generated in the drilling process are taken out and discharged through the drain pipe 8 (as shown in fig. 7);

4) when the wedge-shaped sealing sleeve 17 enters a hole drilled by the deep hole drill bit and is tightly contacted with the hole wall, the first hand wheel 39 is stopped to be shaken; in the subsequent drilling operation, the workpiece 5 drives the wedge-shaped sealing sleeve 17 and further drives the rotary water inlet cylinder 16 to rotate through the front end sleeve 15;

5) after the drilling operation is finished, the hand wheel II 40 is shaken reversely to drive the deep hole drill bit to withdraw from the workpiece 5 through the drain pipe 8, and meanwhile, water supply to the water inlet device 7 is stopped; and then reversely shaking the first hand wheel 39 to enable the water inlet device 7 to be far away from the workpiece 5, stopping the lathe, and unloading the drilled workpiece 5 from the three-jaw chuck 4.

The following examples are carried out on the premise of the technical scheme of the invention, and detailed embodiments and specific operation processes are given, but the scope of the invention is not limited to the following examples.

[ examples ] A method for producing a compound

As shown in fig. 1 and fig. 2, in this embodiment, a long-axis deep-hole drilling device for discharging chips by circulating water includes a lathe, a deep-hole drill, a water inlet unit, and a water discharge unit.

The lathe comprises a main spindle box 1, a first lathe leg 2, a second lathe leg 3, a three-jaw chuck 4, a lathe body 11 and the like which are all arranged conventionally. In the invention, a lathe is used as the basis of the whole device, a workpiece 5 is clamped by a three-jaw chuck 4, and the workpiece 5 is driven to rotate by power provided by a main spindle box 1; the deep hole drill only performs feed motion (moves along the longitudinal direction of the lathe) without rotating, and the deep hole drill and the workpiece 5 perform relative motion, so that the drilling process is completed.

The water inlet unit consists of a water inlet device 7 and a first feeding device; the first feeding device is used for driving the water inlet device 7 to realize feeding movement. After the first hand wheel 39 is shaken, the first hand wheel is meshed with a rack on the lathe bed 11 through a gear transmission mechanism for transmission, and the first feeding frame 12 is matched with a lathe bed guide rail for sliding through a sliding chute, so that the water inlet device 7 is driven to move longitudinally along the lathe bed 11; the transverse position of the water inlet device 7 can be adjusted by swinging the transverse adjusting hand wheel 41.

The feeding device II is used for driving the deep hole drill bit to realize feeding movement through the drain pipe 8, and the principle of the feeding movement is the same as that of the feeding device I; and a second fixed seat 10 is arranged on the second feeding frame 13, the drain pipe 8 penetrates through a through hole in the second fixed seat 10, the drain pipe 8 is locked through a locking mechanism 9 (a spiral locking mechanism is adopted in the embodiment), and the feeding motion of the deep hole drill bit can be realized by shaking a second hand wheel 40.

As shown in fig. 8, the deep hole drill includes a drill body 14, a first guide block 22, a first cutting blade 23, a second cutting blade 24, a second guide block 25, and a third cutting blade 26; in order to complete the drilling operation more preferably, the drill bit body 14 has a vertex angle of 150 ° to 170 °, and in the present embodiment, the drill bit body 14 has a vertex angle of 160 °. The first cutting blade 23, the second cutting blade 24 and the third cutting blade 26 are fixed on the drill bit body 14 through a third screw 37 (a socket head cap screw is adopted in the embodiment); the internal screw-thread fit that external screw thread and drain pipe 8 correspond the end is established to the deep hole drill bit afterbody, and sealed tube threaded connection is adopted to this embodiment, can not take place to leak when guaranteeing rivers from drain pipe 8 discharges.

As shown in fig. 3, 4, 5 and 6, the water inlet device 7 comprises a front end sleeve 15, a rotary water inlet cylinder 16, a wedge-shaped sealing sleeve 17, a water inlet pipe 18, a baffle cover 19, a first screw 20, a second screw 21, a first bearing 27, a first sealing retainer 28, a second bearing 29, a second sealing retainer 30, a snap ring 31, a third bearing 32, a third sealing retainer 33, a fourth bearing 35 and a housing 36; the wedge-shaped sealing sleeve 17 is made of rubber material and is fixed to the outer end of the front sleeve 15. In the water inlet device 7, the first bearing 27 and the second bearing 29 adopt sealed sliding bearings, and the inner sides of the bearings are respectively provided with a first sealing retainer 28 and a second sealing retainer 30 to ensure the sealing property and prevent water from flowing into the bearings. The third bearing 32 and the fourth bearing 35 adopt sealed rolling bearings, the third sealing retainer ring 33 is arranged on the outer side of the third bearing 32 to ensure the sealing performance, and the snap ring 31 is used for restraining the axial movement of the third bearing 32 and the third sealing retainer ring 33. The rotating function of the rotary water inlet cylinder 16 relative to the shell 36 and the water outlet pipe 8 is realized by arranging the bearing I27, the bearing II 29, the bearing III 32 and the bearing IV 35.

The outer end of the rotary water inlet cylinder 16 is matched and connected with a front end sleeve 15 and is fastened through a screw 21, a wedge-shaped sealing sleeve 17 is arranged on the front end sleeve 15 and is used for being in sealing fit with a newly drilled hole in the workpiece 5 and transmitting power to drive the rotary water inlet cylinder 16 to rotate through the workpiece 5; the rotary water inlet cylinder 16 is of a structure with one closed end and the other open end, the open end is provided with a blocking cover 19, and the blocking cover 19 is fixedly connected with the shell 36 through a screw 20. The sealing treatment is carried out between the front end sleeve 15 and the rotary water inlet barrel 16 and between the rotary water inlet barrel 16 and the baffle cover 19. 7

Before the drilling operation starts, the three-jaw chuck 4 is used for fixing the workpiece 5 to be drilled, the positions of the workpiece 5, the water inlet device 7 and the deep hole drill bit are adjusted, and the coaxiality of the three parts is guaranteed. After the lathe is started, the workpiece 5 rotates along with the rotation of the three-jaw chuck 4, the deep hole drill bit only moves without rotating, and the deep hole drill bit and the workpiece 5 move relatively to realize drilling. And then, the first hand wheel 39 and the second hand wheel 40 are shaken to simultaneously realize the feeding of the water inlet device 7, the deep hole drill bit and the drain pipe 8, when the front end of the deep hole drill bit is contacted with the end surface of the workpiece 5, water is supplied into the water inlet device 7, and because the water inlet device 7, the deep hole drill bit and the workpiece 5 are in sealed fit, a water flow channel is formed in the water inlet device 7, the deep hole drill bit and the drain pipe 8, and metal chips generated by drilling are discharged along with water flow. After the drilling operation is finished, firstly, the second hand wheel 40 is shaken to withdraw the deep hole drill bit, meanwhile, the water supply is stopped, then, the first hand wheel 39 is shaken to withdraw the water inlet device 7, finally, the power output of the spindle box 1 is stopped, and the whole drilling process is finished.

As shown in fig. 7, when drilling, water is supplied into the water inlet device 7, water flows into the water inlet area inside the water inlet device 7 through the water inlet pipe 18, then reaches the head of the deep hole drill through the water inlet hole formed in the rotary water inlet cylinder 16 and the internal water inlet channel 34, and is in sealing fit with the workpiece 5 through the wedge-shaped sealing sleeve 17, and the water flows smoothly enter the cutting area of the deep hole drill, so that metal chips generated by drilling are discharged from the water discharge pipe 8 along with the water flows.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (10)

1. A long-shaft deep hole drilling device for discharging chips from circulating water is characterized by comprising a lathe, a deep hole drilling bit, a water inlet unit and a water discharging unit; the water inlet unit consists of a water inlet device and a first feeding device, and the water drainage unit consists of a water drainage pipe and a second feeding device; the water inlet device is arranged on the first feeding device, and a drain pipe channel is arranged on the water inlet device for a drain pipe to pass through; the water inlet device comprises a shell, a rotary water inlet cylinder, a front end sleeve and a wedge-shaped sealing sleeve; the shell is provided with a water inlet pipe, and the inner side of the shell at the corresponding part is a water inlet area; the rotary water inlet cylinder is arranged in the shell and can rotate relative to the shell and the drain pipe; the part of the rotary water inlet cylinder corresponding to the water inlet area is provided with a jacket structure, a plurality of water inlet holes are arranged in the jacket structure and communicated with the water inlet area, and the jacket structure is connected with the shell in a sealing way; a front end sleeve and a wedge-shaped sealing sleeve are arranged at one end of the rotary water inlet cylinder, which is close to a spindle box of a lathe, and a gap is reserved between the surface of an inner hole of the front end sleeve and the outer surface of the deep hole drill bit to serve as a water inlet passage; an axial drainage channel is arranged in the deep hole drill bit, the jacket structure is communicated with the axial drainage channel through an internal water inlet channel, and the axial drainage channel is connected with one end of a drainage pipe; the other end of the water discharge pipe passes through a water discharge pipe channel in the water inlet device and then is connected with the feeding device II; the first feeding device and the second feeding device can both move along the longitudinal direction of the lathe in a feeding mode.

2. The device for drilling the long-axis deep hole for discharging chips by circulating water as claimed in claim 1, wherein the lathe comprises a lathe body, a first lathe leg, a second lathe leg, a spindle box and a three-jaw chuck; two ends of the lathe body are respectively supported by the first lathe leg and the second lathe leg, a main spindle box is arranged at the top of one end of the lathe body, an output shaft of the main spindle box is connected with a three-jaw chuck, and a lathe body guide rail is arranged on the lathe body along the longitudinal direction.

3. The long-shaft deep hole drilling device for discharging circulating water chips as claimed in claim 1, wherein the rotary water inlet cylinder consists of a connecting sleeve and a supporting sleeve, and the middle part of the supporting sleeve is provided with a jacket structure; the outer surface of the front end of the support sleeve close to the connecting sleeve is rotationally connected with the shell through a bearing, and the outer surface of the rear end of the support sleeve is rotationally connected with the shell through a bearing II; the inner surface of the front end of the support sleeve is rotationally connected with the drain pipe through a bearing III, and the inner surface of the rear end of the support sleeve is rotationally connected with the drain pipe through a bearing IV; the shell corresponding to one end of the support sleeve is of a closed structure, the other end of the shell is closed through a blocking cover, and the blocking cover and the shell are fixed through screws; a first sealing check ring is arranged between the jacket structure and the first bearing, and a second sealing check ring is arranged between the jacket structure and the second bearing; an internal water inlet channel is arranged in the support sleeve; the connecting sleeve is fixedly connected with the front end sleeve through a screw.

4. The long-shaft deep hole drilling device for discharging chips from circulating water as claimed in claim 3, wherein the first bearing and the second bearing are both sealing sliding bearings, and the third bearing and the fourth bearing are both sealing rolling bearings.

5. The long-axis deep hole drilling device for discharging circulating water chips as claimed in claim 1, wherein the water inlet holes are rectangular holes and are uniformly arranged in a plurality of rows and a plurality of columns on the outer wall of the jacket structure.

6. The device for the deep hole drilling of the long shaft for discharging the chips from the circulating water is characterized in that the deep hole drilling head consists of a drilling head body, a first cutting knife, a second cutting knife, a third cutting knife, a first guide block and a second guide block; the drill bit body is divided into a cutting end and a connecting end, the cutting end is provided with 2 cutting parts, a first cutting knife is arranged on a main cutting edge of one cutting part, and a first guide block is arranged on the outer side of the main cutting edge; a second cutting knife and a third cutting knife are arranged on the main cutting edge of the other cutting part along the radial direction, and a second guide block is arranged on the outer side of the main cutting edge; the 2 cutting parts are connected with the part corresponding to the center of the drill body, and axial drainage channels are respectively arranged among the 2 cutting parts; the connecting end is connected with the corresponding end of the water drainage pipe through threads.

7. The long-axis deep hole drilling device for discharging circulating water chips as claimed in claim 6, wherein the vertex angle of the drill bit body is 150-170 °.

8. The device for drilling the deep hole with the long shaft for discharging chips from the circulating water is characterized in that a first feeding device consists of a first feeding frame, a transverse sliding plate, a first hand wheel, a first fixing seat and a transverse adjusting hand wheel, a sliding groove matched with a guide rail of a lathe body is formed in the bottom of the first feeding frame, the first hand wheel is in meshing transmission with a rack on the corresponding side of the lathe body through a gear transmission mechanism, and the first feeding device realizes the feeding motion of the first feeding frame along the longitudinal direction of the lathe body; a transverse sliding plate is arranged on the feeding frame I, the transverse sliding plate is in sliding connection with the feeding frame I through a screw rod mechanism, and the transverse sliding plate moves along the transverse direction of the lathe bed through a transverse adjusting hand wheel; the first fixing seat is arranged on the transverse sliding plate and used for fixing the water inlet device.

9. The long-shaft deep hole drilling device for discharging chips from circulating water as claimed in claim 1, wherein the feeding device II consists of a feeding frame II, a hand wheel II, a fixing seat II and a locking mechanism; the bottom of the feeding frame II is provided with a sliding chute matched with a guide rail of the lathe bed, and the hand wheel II is in meshing transmission with a rack on the corresponding side of the lathe bed through a gear transmission mechanism and realizes the feeding motion of the feeding frame II along the longitudinal direction of the lathe bed; the second fixing seat is arranged on the second feeding frame, a through hole is formed in the second fixing seat, and the drain pipe penetrates through the through hole and is locked and fixed through the locking mechanism.

10. The method for drilling the long-axis deep hole by discharging the circulating water based on any one of the devices of claims 1 to 9 is characterized by comprising the following steps:

1) a workpiece to be drilled is installed and clamped in a three-jaw chuck of a lathe, a drain pipe penetrates through the second fixing seat and the water inlet device and then is connected with a deep hole drill bit, and the position of the water inlet device is adjusted through a transverse adjusting hand wheel so that the deep hole drill bit and the rotary water inlet cylinder are coaxial with the workpiece;

2) the lathe is started, the three-jaw chuck drives the workpiece to rotate, and the hand wheel I and the hand wheel II are shaken simultaneously to drive the water inlet device, the deep hole drill bit and the drain pipe to feed simultaneously;

3) after the deep hole drill bit is contacted with the end face of the workpiece, water is supplied to the water inlet device through the water inlet pipe; after the drilling operation is started, water flows into a water inlet area of the water inlet device from the water inlet pipe, flows through a water inlet hole in the jacket structure, and is conveyed to the front end of the deep-hole drill bit through an internal water inlet channel in the jacket structure;

4) when the wedge-shaped sealing sleeve enters a hole drilled by the deep hole drill bit and is tightly contacted with the hole wall, stopping shaking the first hand wheel; in the subsequent drilling operation, the wedge-shaped sealing sleeve is driven by the workpiece, and then the rotary water inlet cylinder is driven to rotate by the front end sleeve;

5) after the drilling operation is finished, reversely shaking the hand wheel II to drive the deep hole drill bit to withdraw from the workpiece through the drain pipe, and simultaneously stopping supplying water into the water inlet device; and then reversely shaking the first hand wheel to enable the water inlet device to be far away from the workpiece, stopping the lathe, and detaching the drilled workpiece from the three-jaw chuck.

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