CN211386922U - Special numerical control machine tool for turning inner circle and outer circle of piston ring - Google Patents

Abstract

The utility model discloses a special numerical control machine tool for turning inner and outer circles of piston rings, which comprises a lathe bed, a main shaft arranged on the lathe bed, a special inner hole turning fixture passing through the main shaft, a W shaft arranged on the lathe bed, a tailstock material-reducing and feeding device for turning inner and outer holes driven by the W shaft to move back and forth, a Z shaft arranged on the lathe bed, a saddle sliding plate driven by the Z shaft to move back and forth, an X shaft arranged on the saddle sliding plate, a tool rest for turning inner holes driven by the X shaft to move up and down, and a blanking mechanism arranged at the rear side of the lathe bed; the piston ring advances forward through the push rod on the propeller that interior, outer hole turning was gone up with tailstock material loading attachment and is installed, puts in place the back and is pushed the piston ring into the feed cylinder of precompression through vertical push pedal by vertical propulsion jar, advances forward again by horizontal propulsion jar with the piston ring from the feed cylinder of precompression feed cylinder that contracts, cooperation turning special fixture, knife rest, unloading mechanism and each feed, effectively promote machining efficiency and machining precision.

Description

Special numerical control machine tool for turning inner circle and outer circle of piston ring

Technical Field

The utility model relates to a piston ring processing technology field specifically is a special digit control machine tool of piston ring internal and excircle turning.

Background

The piston ring is used as a small part in a piston cavity of an automobile engine, plays a role in lifting the sealing performance of a combustion chamber of the automobile engine, most of the turning of the piston ring adopts a common special machine tool at present, the outer circle of the piston ring is clamped and machined after being manually compressed in place by a special fixture, and the inner hole is turned by a simple feeding mechanism matched with a hydraulic oil cylinder and pushed into a main shaft tool for machining;

when the piston ring excircle is machined by a machine tool at present, the piston ring needs to be manually compressed by a special tool, after the compression is finished, the excircle shaping sleeve is removed, and then the piston ring shaping sleeve is clamped to the machine tool, so that the working strength of workers is greatly increased, the number of piston rings is manually clamped by most factories once within 20, and the manual material shrinkage is large in time occupation in an auxiliary link, so that the machining efficiency is low;

because the cooling liquid is adopted for processing, iron powder precipitates are difficult to clean, and meanwhile, if the quality of the cooling liquid is poor, a piston ring can be rusted and scrapped;

in the processing process by adopting common equipment, the edges and corners of the piston ring are sharp, the protection measures of the equipment are lost, and the personal safety of workers can be threatened by flying or jumping of parts in the processing process; due to manual feeding, the clamping precision cannot be controlled, the result of multi-ring scrapping is possibly caused, and the processing precision cannot be guaranteed; at present, conventional equipment for turning the inner circle and the outer circle of a piston ring cannot meet the market requirement, and the prior art is urgently needed to be reformed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a special digit control machine tool of piston ring inside and excircle turning to solve the problem that proposes in the above-mentioned background art.

The utility model provides a special numerically-controlled machine tool of turning of circle in piston ring following technical scheme, including the lathe bed, install the main shaft on the lathe bed, the hole turning special fixture that passes the main shaft, install the W axle on the lathe bed, the hole for turning tailstock material reducing loading attachment of moving back and forth is driven by the W axle, install the Z axle on the lathe bed, the saddle slide of moving back and forth is driven by the Z axle, the X axle of installing on the saddle slide, the hole for turning that moves up and down is driven by the X axle, install the unloading mechanism in the rear side of the lathe bed, and necessary electric, gas, liquid etc. auxiliary system control each part cooperation action, realize the interior outer circle turning work of piston ring;

the special inner hole turning clamp consists of an inner positioning sleeve, an outer positioning sleeve, a connecting disc, a bearing, a second push rod, an air suction pipe, a pull rod, a telescopic cylinder connecting disc, a first telescopic cylinder and a suction pipe support;

the connecting disc is fixedly connected with the front end part of the main shaft, the outer positioning sleeve is fixedly connected with the connecting disc through a screw, the inner positioning sleeve is installed inside the outer positioning sleeve in a conical surface mode, and the end face gland is fixedly connected with the outer edge of the outer positioning sleeve in a back-off mode. The telescopic cylinder connecting disc is fixedly connected with the tail end of the main shaft, the first telescopic cylinder is fixedly installed on the telescopic cylinder connecting disc, the second push rod penetrates through an inner hole of the main shaft, one end of the second push rod slides in the inner positioning sleeve, the other end of the second push rod is fixedly connected with the pull rod, the other end of the pull rod is movably connected with the first telescopic cylinder, and the pull rod pushes out the piston ring after the piston ring is compressed through the first telescopic cylinder in a telescopic motion. The middle of the pull rod penetrates through the air suction pipe, one end of the pull rod is fixedly connected with the second push rod through a bearing, the other end of the pull rod is fixedly connected with the suction pipe support, the suction pipe is installed on the suction pipe support, and the suction pipe collects turned iron powder through an external dust remover.

The cutter holder for inner hole turning comprises: the tool rest comprises a tool rest main body, a rotary cutter head, an inner hole turning tool, a second telescopic cylinder, a guide block and a first unloading claw;

the utility model discloses a lathe tool, including tool rest main part, first unloading claw, end face pressure disk loading and unloading section of thick bamboo, tool rest main part and saddle slide swing joint install rotatory blade disc in the tool rest main part, and rotatory blade disc passes through the tool rest main part drive rotation, installs hole lathe tool, first unloading claw and end face pressure disk loading and unloading section of thick bamboo on the rotatory blade disc, four quadrant position departments of end face pressure disk loading and unloading section of thick bamboo install guide block and second telescoping cylinder, end face pressure disk loading and unloading section of thick bamboo compresses tightly and loosen the end face gland through the guide way cooperation.

Unloading mechanism, include: the device comprises a blanking guide rod, a spiral guide rod, a driving motor, a guide chute, a blanking support rod, a support frame and a material collecting chute;

the utility model discloses a lathe bed, including lathe bed, screw guide bar, drive motor, baffle box, unloading bracing piece, driving motor and screw guide bar's one end fixed connection, the screw guide bar other end and baffle box fixed connection, top fixed mounting has the unloading guide bar on the baffle box, driving motor drives the rotatory in-process of screw guide bar and drives the rotatory while that advances of piston ring, fall into behind the same direction behind the piston ring fluting position arrangement behind the baffle box along the baffle box slip, then fall into with baffle box lower extreme fixed connection's the groove that gathers materials, the baffle box lower extreme passes through the support frame to support.

The utility model also provides a special digit control machine tool of piston ring excircle turning, wherein, change tailstock that the hole turning of a special digit control machine tool of piston ring excircle turning with the tailstock feeding device that contracts, special anchor clamps of hole turning, knife rest for hole turning with tailstock that excircle turning contracts feeding device, special anchor clamps of excircle turning, knife rest for excircle turning, all the other parts are unchangeable;

the tailstock shrinkage feeding device for turning the outer circle is characterized in that a material shrinkage barrel in the tailstock shrinkage feeding device for turning the inner hole is replaced by an elastic chuck, a clamping cylinder is arranged on the side edge of the elastic chuck, adjusting screws are arranged on the periphery of a shrinkage feeding support to adjust the coaxiality of the elastic chuck and a horizontal pushing cylinder, the clamping amplitude of the elastic chuck is controlled by controlling the force of the clamping cylinder, and other parts are unchanged;

the tailstock material-shrinking and feeding device is a special structure of a numerical control machine tool special for turning the inner circle and the outer circle of a piston ring and is specially designed for machining the piston ring, so that full-automatic material-shrinking and feeding are realized; hole turning is with tailstock material loading attachment that contracts, its structure is: tailstock bottom plate and W axle fixed connection, tailstock bottom plate upper end is installed and is contracted material loading support, contracts material loading support and pass through adjusting screw and adjusting bracket fixed connection, and adjusting bracket upper end fixed mounting has the V-arrangement piece, and makes lateral shifting through adjusting screw adjustment V-arrangement piece, and the piston ring is installed to V-arrangement piece upper end, and the piston ring promotes the forward movement through installing in the first push rod of propeller upside, and the propeller is fixed in one side that contracts material loading support. A vertical pushing cylinder is fixedly mounted at the upper end of the material shrinking and feeding support through a vertical pushing cylinder support, one side of the vertical pushing cylinder is fixedly connected with a vertical pushing plate, a pre-compressing material barrel is mounted at the upper side of the material shrinking and feeding support at a position right below the vertical pushing plate, a horizontal pushing cylinder is mounted in the material shrinking and feeding support, a horizontal pushing plate is mounted at the end of the horizontal pushing cylinder, and a material shrinking barrel is mounted at the front end of the material shrinking and feeding support;

the piston ring is pushed forwards through a first push rod on the propeller, after the piston ring is in place, the piston ring is pushed into the pre-compression material barrel through a vertical push plate by vertical movement of a vertical pushing cylinder, then the piston ring is pushed into the material barrel from the pre-compression material barrel by forward movement of a horizontal pushing cylinder, and the tail stock material-retracting and feeding device for turning the whole set of inner holes is driven by a W shaft to move back and forth.

Piston ring excircle turning special fixture includes: the device comprises a fixing screw, a conical sleeve, an elastic end face pressing sleeve, a tension rod, a positioning sleeve, an outer pull rod, an inner pull rod, a clamp connecting disc, a double-acting cylinder connecting disc and a double-acting cylinder;

the clamp connecting disc is fixedly connected with the front end of the main shaft, the double-acting cylinder connecting disc is fixedly connected with the tail end of the main shaft, an inner hole of the positioning sleeve penetrates through the elastic end face pressing sleeve to be movably connected with the outer pull rod, the inner hole of the outer pull rod is communicated with the inner pull rod, one end of the inner pull rod is movably connected with the tensioning rod, the conical sleeve penetrates through the tensioning rod to be connected with the elastic end face pressing sleeve in a conical face mode, a fixing screw is installed at one end of the tensioning rod, the inner pull rod and the outer pull rod are respectively movably connected with the double-acting cylinder, the double-acting cylinder presses the elastic end face pressing sleeve to be opened in the process that the inner pull rod is pulled backwards through the conical sleeve, then the outer pull rod is tensioned backwards, a piston ring is pressed through the elastic end face pressing sleeve.

The special tool rest for cylindrical turning comprises: the excircle turning tool, the second unloading claw and the finger cylinder; an excircle turning tool and a finger cylinder are installed on the rotary cutter disc, and second discharging claws are installed on two sides of the finger cylinder and used for discharging after the excircle turning of the piston ring is finished.

Drawings

FIG. 1 is a general layout view of a numerical control machine tool specially used for turning an inner hole of a piston ring;

FIG. 2 is a general layout view of a numerical control machine tool dedicated for turning the outer circle of a piston ring;

FIG. 3(a) is a schematic structural view of a tailstock material-shrinking and feeding device for inner hole turning;

FIG. 3(b) is a cross-sectional view of the tailstock reducing and feeding device for inner hole turning;

FIG. 4 is a schematic structural view of a tailstock material-shrinking and feeding device for cylindrical turning;

FIG. 5 is a sectional view of a piston ring inner hole turning special fixture structure;

FIG. 6 is a sectional view of a clamp special for turning the outer circle of a piston ring;

FIG. 7 is a schematic view of a structure of a tool holder for turning an inner hole of a piston ring;

FIG. 8 is a schematic structural view of a tool rest for turning the outer circle of a piston ring;

FIG. 9 is a schematic structural view of a blanking mechanism of a numerically-controlled machine tool dedicated for turning inner and outer circles of a piston ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the utility model provides a field ordinary skilled person does not make all other embodiments that obtain under the creative work prerequisite, all belong to the utility model discloses the scope of protection.

In a first aspect, the utility model provides a numerical control machine tool special for turning the inner circle of a piston ring, which adopts the following technical scheme;

referring to fig. 1, the numerical control machine tool special for turning the inner circle comprises a machine body 2, a main shaft 1 installed on the machine body 2, a clamp 3 special for turning the inner hole penetrating through the main shaft 1, a W shaft 4 installed on the machine body 2, a tailstock material-shrinking and feeding device 5 for turning the inner hole, which is driven by the W shaft 4 to move back and forth, a Z shaft 6 installed on the machine body 2, a saddle sliding plate 8 driven by the Z shaft 6 to move back and forth, an X shaft 7 installed on the saddle sliding plate 8, a tool rest 9 for turning the inner hole, which is driven by the X shaft 7 to move up and down, a blanking mechanism 10 installed on the rear side of the machine body 2, and necessary auxiliary systems such as electricity, gas and liquid, etc., to.

The tailstock material-shrinking and feeding device is a special structure of a numerical control machine tool special for turning the inner circle and the outer circle of a piston ring and is specially designed for machining the piston ring, so that full-automatic material-shrinking and feeding are realized;

referring to fig. 3(a) and 3(b), the tailstock reducing and feeding device 5 for inner hole turning has the structure that: the tailstock bottom plate 501 is fixedly connected with the W shaft 4, the material shrinkage and feeding support 502 is installed at the upper end of the tailstock bottom plate 501, the material shrinkage and feeding support 502 is fixedly connected with the adjusting support 504 through an adjusting screw 503, a V-shaped block 505 is fixedly installed at the upper end of the adjusting support 504, the V-shaped block 505 is adjusted to move transversely through the adjusting screw 503, a piston ring 508 is installed at the upper end of the V-shaped block 505, the piston ring 508 is pushed to move forwards through a first push rod 507 installed on the upper side of the thruster 506, and the thruster 506 is fixed on one side of the material shrinkage and feeding support 502. The upper end of the material-reducing and feeding support 502 is fixedly provided with a vertical pushing cylinder 509 through a vertical pushing cylinder support 510, one side of the vertical pushing cylinder 509 is fixedly connected with a vertical pushing plate 512, a position right below the vertical pushing plate 512 is provided with a pre-compressing material barrel 515 arranged on the upper side of the material-reducing and feeding support 502, the material-reducing and feeding support 502 is internally provided with a horizontal pushing cylinder 513, the end part of the horizontal pushing cylinder 513 is provided with a horizontal pushing plate 514, and the front end of the material-reducing and feeding support 502 is provided with a material-reducing barrel 511. When it works: the piston ring 508 is pushed forward by a first push rod 507 on the pusher 506, after the piston ring is in place, the piston ring 508 is pushed into the pre-compression material barrel 515 by the vertical movement of a vertical push cylinder 509 through a vertical push plate 512, then the piston ring 508 is pushed into the material barrel 511 from the pre-compression material barrel 515 by the forward movement of a horizontal push cylinder 513, and the whole set of tail stock material-compressing and feeding device 5 for inner hole turning is driven by the W shaft 4 to move back and forth.

Referring to fig. 5, the inner hole turning special fixture 3 is composed of an inner positioning sleeve 302, an outer positioning sleeve 303, a connecting disc 304, a bearing 305, a second push rod 306, an air suction pipe 307, a pull rod 308, a telescopic cylinder connecting disc 309, a first telescopic cylinder 310 and a suction pipe support 311;

the connecting disc 304 is fixedly connected with the front end part of the spindle 1, the outer positioning sleeve 303 is fixedly connected with the connecting disc 304 through a screw, the inner positioning sleeve 302 is installed inside the outer positioning sleeve 303 in a conical surface mode, the end face gland 301 is fixedly connected with the outer edge of the outer positioning sleeve 303 in a back-off mode, the telescopic cylinder connecting disc 309 is fixedly connected with the tail end of the spindle 1, the first telescopic cylinder 310 is fixedly installed on the telescopic cylinder connecting disc 309, the second push rod 306 penetrates through an inner hole of the spindle 1, one end of the second push rod slides in the inner positioning sleeve 302, the other end of the second push rod is fixedly connected with the pull rod 308, the other end of the pull rod 308 is movably connected with the first telescopic cylinder 310, the pull rod 308 tightly presses a piston ring through telescopic motion of the first telescopic cylinder 310 and then pushes out the piston ring, the middle of the pull rod 308 penetrates through the air suction pipe, the other end is fixedly connected with the suction pipe support 311, a suction pipe is installed on the suction pipe support 311, and the suction pipe collects the turned iron powder through an external dust remover.

Refer to fig. 7 and 5; the inner hole turning tool holder 9 comprises: the tool rest comprises a tool rest main body 901, a rotary cutter head 902, an inner hole lathe tool 903, a second telescopic cylinder 905, a guide block 906 and a first discharging claw 907;

the tool rest main body 901 is movably connected with a saddle sliding plate 8, a rotary cutter head 902 is mounted on the tool rest main body 901, the rotary cutter head 902 is driven to rotate through the tool rest main body 901, an inner hole turning tool 903, a first discharging claw 907 and an end face platen assembling and disassembling barrel 904 are mounted on the rotary cutter head 902, guide blocks 906 and a second telescopic cylinder 905 are mounted at four quadrant positions of the end face platen assembling and disassembling barrel 904, the end face platen assembling and disassembling barrel 904 is matched and positioned with a guide groove of an end face gland 301 through the guide blocks 906, and the end face gland 301 is tightly pressed and loosened through the second telescopic cylinder 905 for assembling and disassembling.

In a second aspect, the utility model provides a numerical control machine tool special for turning the excircle of the piston ring in the following technical scheme;

referring to fig. 1 and 2, the numerical control machine tool special for plug ring excircle turning and the numerical control machine tool special for piston ring inner circle turning have the technical characteristics that: correspondingly replacing a tailstock shrinkage feeding device 5 for turning an inner hole, an inner hole turning special fixture 3 and an inner hole turning tool rest 9 in the piston ring inner circle turning special numerical control machine tool with a tailstock shrinkage feeding device 40 for turning an outer circle, an outer circle turning special fixture 20 and a tool rest 30 for turning an outer circle of the piston ring outer circle turning special numerical control machine tool respectively, and keeping the rest parts unchanged;

referring to fig. 2, 3(a), 3(b) and 4, the tailstock shrinkage feeding device 40 for external circle turning replaces the material shrinkage cylinder 511 in the tailstock shrinkage feeding device 5 for internal hole turning with the elastic chuck 4002, the clamping cylinder 4001 is installed on the side edge of the elastic chuck 4002, the adjusting screws 4003 are installed around the shrinkage feeding support 502 to adjust the coaxiality of the elastic chuck 4002 and the horizontal pushing cylinder 513, the clamping amplitude of the elastic chuck is controlled by controlling the force of the clamping cylinder, and other parts are not changed.

Piston ring excircle turning special fixture 20 includes: a fixing screw 2001, a taper sleeve 2002, an elastic end face pressing sleeve 2003, a tension rod 2004, a positioning sleeve 2005, an outer pull rod 2006, an inner pull rod 2007, a clamp connecting disc 2008, a double-acting cylinder connecting disc 2009 and a double-acting cylinder 2010;

referring to fig. 2 and 6, the clamp connecting disc 2008 is fixedly connected to the front end of the main shaft 1, and the double acting cylinder connecting disc 2009 is fixedly connected to the end of the main shaft 1, the inner hole of the positioning sleeve 2005 penetrates through the elastic end face pressing sleeve 2003 to be movably connected with the outer pull rod 2006, and the inner hole of the outer pull rod 2006 is communicated with the inner pull rod 2007, one end of the inner pull rod 2007 is movably connected with the tightening rod 2004, the conical sleeve 2002 penetrates through the tightening rod 2004 to be connected with the elastic end face pressing sleeve 2003 in a conical surface mode, a fixing screw 2001 is installed at one end of the tightening rod 2004, the inner pull rod 2007 and the outer pull rod 2006 are movably connected with a double-acting cylinder 2010 respectively, the double-acting cylinder 2010 props the elastic end face pressing sleeve 2003 open through a conical sleeve 2002 in the process that the inner pull rod 2007 is pulled backwards, then the outer pull rod 2006 is tensioned backwards, the piston ring is pressed tightly by the end face of the elastic end face pressing sleeve 2003, the opening size of the elastic end face pressing sleeve 2003 is adjusted by adjusting the position of a fixing screw 2001.

Referring to fig. 7 and 8, the special tool holder 30 for external turning includes: the excircle lathe tool 3001, the second claw of unloading 3002 and finger cylinder 3003 install excircle lathe tool 3001 and finger cylinder 3003 on rotatory blade disc 902, at its finger cylinder 3003 both sides installation second claw of unloading 3002 for unload after the piston ring excircle turning is accomplished.

Refer to fig. 1 and 9; the blanking mechanism 10 includes: a blanking guide rod 1001, a spiral guide rod 1002, a driving motor 1003, a material guide groove 1004, a blanking support rod 1005, a support frame 1006 and a material collecting groove 1007;

unloading bracing piece 1005 is fixed in 2 side positions of lathe bed, driving motor 1003 and spiral guide bar 1002's one end fixed connection, the spiral guide bar 1002 other end and baffle box 1004 fixed connection, top fixed mounting has unloading guide bar 1001 on the baffle box 1004, driving motor 1003 drives the rotatory in-process of spiral guide bar 1002 and drives piston ring rotation and go forward the time with piston ring fluting position arrangement fall into behind the same direction behind baffle box 1004 along the baffle box 1004 slip, then fall into with baffle box 1004 lower extreme fixed connection's collecting trough 1007 in, the baffle box 1004 lower extreme passes through support frame 1006 support fixedly.

Referring to fig. 3(a) and 3(b), when the utility model is used, the piston ring is neatly placed to the fixed pre-compression material cylinder 515 of the inner hole turning tailstock material-compressing feeding device 5 by an operator, the machine tool is started, the system starts to operate, the piston ring 508 is pushed forward by the first push rod 507 on the pusher 506, after the piston ring is in place, the piston ring 508 is pushed into the pre-compression material cylinder 515 by the vertical push plate 512 through the vertical movement of the vertical push cylinder 509, then the piston ring 508 is pushed into the material-compressing cylinder 511 from the pre-compression material cylinder 515 through the forward movement of the horizontal push cylinder 513, the horizontal push cylinder 513 returns to the original position, the action on the inner hole turning tailstock material-compressing feeding device 5 is completed, and the whole set of inner hole turning tailstock material-compressing feeding device 5 is driven by the W shaft 4 to;

referring to fig. 1, after the actions are completed, the W shaft 4 drives the tailstock shrinkage feeding device 5 for inner hole turning to horizontally move forward to a designated position, the special inner hole turning clamp 3 is tensioned backwards, the end face is tightly pressed to be outwards supported in the circumferential direction, the special inner hole turning clamp 3 is tensioned backwards, the piston ring is integrally fixed on the special inner hole turning clamp 3, the W shaft 4 retreats to the original position, the main shaft starts to rotate, the tool rest 30 for outer circle turning is used for changing the tool to an outer circle turning station for processing, and meanwhile, the tailstock shrinkage feeding device 5 for inner hole turning repeatedly and automatically completes the actions required to be completed on the parts until the shrinkage is completed, and waits for the subsequent piston ring to be sent to the main shaft;

referring to fig. 1, 6, 7 and 9, after the outer circle of the piston ring is machined, the tool rest 30 for turning the outer circle retracts to a safe position, the rotary cutter head 902 rotates to a material taking station, the X-axis 7 and the Z-axis 6 move forwards in a matched manner to the material taking position, the special inner hole turning clamp 3 at the rear end of the main shaft sequentially releases the outer pull rod 2006 and the inner pull rod 2007, after the piston ring is transferred to the material taking station, the X-axis 7 and the Z-axis 6 move to the end of the blanking guide rod 1001 of the blanking mechanism 10 in a matched manner, the piston ring slides downwards by means of gravity, meanwhile, after the blanking of the main shaft is completed, the W-axis 4 clamps the piston ring which is subjected to material shrinkage, and when the material taking station on the tool rest 30 for;

during processing, the piston ring slides to the position of a spiral guide rod 1002 driven by a driving motor 1003, the piston ring 508 is driven to rotate by the spiral guide rod 1002, and the opening of the piston ring is adjusted to the same direction in the rotating process and then slides out of the machine tool; so far, the above circulation actions are all completed.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (10)

1. The utility model provides a special digit control machine tool of turning in piston ring which characterized in that: the lathe comprises a lathe body (2), a main shaft (1) arranged on the lathe body (2), a special inner hole turning fixture (3) penetrating through the main shaft (1), a W shaft (4) arranged on the lathe body (2), a tailstock material-reducing and feeding device (5) for inner hole turning driven by the W shaft (4) to move back and forth, a Z shaft (6) arranged on the lathe body (2), a saddle sliding plate (8) driven by the Z shaft (6) to move back and forth, an X shaft (7) arranged on the saddle sliding plate (8), a tool rest (9) for inner hole turning driven by the X shaft (7) to move up and down, and a blanking mechanism (10) arranged on the rear side of the lathe body (2).

2. The numerical control machine tool special for turning the inner circle of the piston ring according to claim 1, is characterized in that: hole turning is with tailstock feed arrangement that contracts (5) includes: the device comprises a tailstock bottom plate (501), a material-reducing and feeding support (502), an adjusting screw (503), an adjusting support (504), a V-shaped block (505), a propeller (506), a first push rod (507), a piston ring (508), a vertical pushing cylinder (509), a vertical pushing cylinder support (510), a material-reducing cylinder (511), a vertical push plate (512), a horizontal pushing cylinder (513) and a horizontal pushing disc (514);

the tail seat bottom plate (501) is fixedly connected with the W shaft (4), a material shrinkage and feeding support (502) is installed at the upper end of the tail seat bottom plate (501), and the material shrinkage and feeding support (502) is fixedly connected with an adjusting support (504) through an adjusting screw (503);

a V-shaped block (505) is fixedly arranged at the upper end of the adjusting bracket (504), the V-shaped block (505) is transversely adjusted and moved through an adjusting screw (503), a piston ring (508) is arranged at the upper end of the V-shaped block (505), and the piston ring (508) is pushed to move forwards through a first push rod (507) arranged at the upper side of the propeller (506);

the propeller (506) is fixed on one side of the material shrinking and feeding support (502), and a vertical propelling cylinder (509) is fixedly installed at the upper end of the material shrinking and feeding support (502) through a vertical propelling cylinder support (510);

one side of the vertical pushing cylinder (509) is fixedly connected with a vertical push plate (512), and a pre-compression charging barrel (515) is arranged on the upper side of the material-shrinkage and loading bracket (502) at the position right below the vertical push plate (512);

a horizontal pushing cylinder (513) is installed inside the material-reducing and feeding support (502), a horizontal pushing plate (514) is installed at the end of the horizontal pushing cylinder (513), and a material-reducing barrel (511) is installed at the front end of the material-reducing and feeding support (502).

3. The numerical control machine tool special for turning the inner circle of the piston ring according to claim 1, is characterized in that: the inner hole turning special clamp (3) is composed of an inner positioning sleeve (302), an outer positioning sleeve (303), a connecting disc (304), a bearing (305), a second push rod (306), an air suction pipe (307), a pull rod (308), a telescopic cylinder connecting disc (309), a first telescopic cylinder (310) and a suction pipe support (311);

the end surface gland (301) is fixedly connected with the outer edge of the outer positioning sleeve (303) in a back-off mode;

the inner positioning sleeve (302) is arranged in the outer positioning sleeve (303) in a conical surface mode, the outer positioning sleeve (303) is fixedly connected with a connecting disc (304) through a screw, and the connecting disc (304) is fixedly connected with the front end part of the main shaft (1);

the telescopic cylinder connecting disc (309) is fixedly connected with the tail end of the main shaft (1), and the first telescopic cylinder (310) is fixedly mounted on the telescopic cylinder connecting disc (309);

the second push rod (306) penetrates through one end of an inner hole of the main shaft (1) and slides in the inner positioning sleeve (302), the other end of the second push rod (306) is fixedly connected with the pull rod (308), and the other end of the pull rod (308) is movably connected with the first telescopic cylinder (310);

the pull rod (308) makes telescopic motion through the first telescopic cylinder (310) to press the piston ring and then push the piston ring out;

one end of the pull rod (308) penetrates through the air suction pipe (307) and is fixedly connected with the second push rod (306) through a bearing (305), the other end of the pull rod (308) is fixedly connected with the suction pipe support (311), and the suction pipe is arranged on the suction pipe support (311).

4. The numerical control machine tool special for turning the inner circle of the piston ring according to claim 1, is characterized in that: the inner hole turning tool holder (9) comprises: the tool rest comprises a tool rest main body (901), a rotary cutter head (902), an inner bore turning tool (903), a second telescopic cylinder (905), a guide block (906) and a first discharging claw (907);

the tool rest main body (901) is movably connected with the saddle sliding plate (8), a rotary cutter head (902) is arranged on the tool rest main body (901), and the rotary cutter head (902) is driven to rotate by the tool rest main body (901);

an inner bore turning tool (903), a first discharging claw (907) and an end face pressure plate loading and unloading barrel (904) are mounted on the rotary cutter head (902);

guide blocks (906) and a second telescopic cylinder (905) are installed at four quadrant positions of the end face pressure plate loading and unloading cylinder (904), and the end face pressure plate loading and unloading cylinder (904) is matched and positioned with a guide groove of the end face gland (301) through the guide blocks (906).

5. The numerical control machine tool special for turning the inner circle of the piston ring according to claim 1, is characterized in that: the blanking mechanism (10) comprises: the device comprises a blanking guide rod (1001), a spiral guide rod (1002), a driving motor (1003), a material guide groove (1004), a blanking support rod (1005), a support frame (1006) and a material collecting groove (1007);

the blanking support rod (1005) is fixed at the side position of the bed body (2), one end of the spiral guide rod (1002) is fixedly connected with the driving motor (1003), and the other end of the spiral guide rod (1002) is fixedly connected with the material guide groove (1004);

the feeding device is characterized in that a blanking guide rod (1001) is fixedly mounted at the top end of the guide chute (1004), two ends of the lower side of the guide chute (1004) are fixedly supported by a support frame (1006), and the lower end of the guide chute (1004) is fixedly connected with a material collecting groove (1007).

6. The utility model provides a special digit control machine tool of piston ring excircle turning which characterized in that: the lathe comprises a lathe body (2), a main shaft (1) arranged on the lathe body (2), a special fixture (20) for cylindrical turning penetrating through the main shaft (1), a W shaft (4) arranged on the lathe body (2), a tailstock material-reducing and feeding device (40) for cylindrical turning driven by the W shaft (4) to move back and forth, a Z shaft (6) arranged on the lathe body (2), a saddle sliding plate (8) driven by the Z shaft (6) to move back and forth, an X shaft (7) arranged on the saddle sliding plate (8), a tool rest (30) for cylindrical turning driven by the X shaft (7) to move up and down, and a blanking mechanism (10) arranged on the rear side of the lathe body (2).

7. The numerical control machine tool special for piston ring outer circle turning according to claim 6, characterized in that: the tailstock material-shrinking and feeding device (40) for cylindrical turning is provided with an elastic chuck (4002), and a clamping cylinder (4001) is installed on the side edge of the elastic chuck (4002).

8. The numerical control machine tool special for piston ring outer circle turning according to claim 6, characterized in that: piston ring excircle turning special fixture (20) includes: the device comprises a fixing screw (2001), a conical sleeve (2002), an elastic end face pressing sleeve (2003), a tensioning rod (2004), a positioning sleeve (2005), an outer pull rod (2006), an inner pull rod (2007), a clamp connecting disc (2008), a double-acting cylinder connecting disc (2009) and a double-acting cylinder (2010);

the clamp connecting disc (2008) is fixedly connected with the front end of the main shaft (1), and the double-acting cylinder connecting disc (2009) is fixedly connected with the tail end of the main shaft (1);

an inner hole of the positioning sleeve (2005) penetrates through the elastic end face pressing sleeve (2003) to be movably connected with the outer pull rod (2006), and the inner hole of the outer pull rod (2006) is communicated with the inner pull rod (2007);

one end of the inner pull rod (2007) is movably connected with the tensioning rod (2004), and the inner pull rod (2007) and the outer pull rod (2006) are respectively movably connected with the double-acting cylinder (2010);

one end of the tension rod (2004) is provided with a fixing screw (2001), and the conical sleeve (2002) penetrates through the tension rod (2004) and is connected with the elastic end face pressing sleeve (2003) in a conical surface mode.

9. The numerical control machine tool special for piston ring outer circle turning according to claim 8, characterized in that: the double-acting cylinder (2010) stretches the elastic end face pressing sleeve (2003) through the conical sleeve (2002) in the process of pulling the inner pull rod (2007) backwards, the outer pull rod (2006) is pulled backwards, and the piston ring is pressed through the end face of the elastic end face pressing sleeve (2003).

10. The numerical control machine tool special for piston ring outer circle turning according to claim 6, characterized in that: the special tool rest (30) for cylindrical turning comprises: the device comprises an excircle turning tool (3001), a second unloading claw (3002) and a finger cylinder (3003).

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