CN214603108U

CN214603108U - Numerical control machine tool

Info

Publication number: CN214603108U
Application number: CN202120027253.3U
Authority: CN
Inventors: 黄小明
Original assignee: ZHEJIANG KAIDA MACHINE TOOL CO Ltd
Current assignee: ZHEJIANG KAIDA MACHINE TOOL CO Ltd
Priority date: 2021-01-06
Filing date: 2021-01-06
Publication date: 2021-11-05
Anticipated expiration: 2031-01-06

Abstract

The application relates to a numerical control machine tool, in particular to a self-centering center frame numerical control machine tool, which comprises a machine body, a tool apron, a turning tool arranged on the tool apron and a clamping device used for clamping a workpiece, the clamping device is arranged on the lathe bed, a sliding guide rail is arranged on the lathe bed, a sliding seat is movably arranged on the sliding guide rail, the tool apron is arranged on the sliding seat, a self-centering center frame for clamping a workpiece is arranged on the sliding seat, the self-centering center frame comprises a mounting seat, a jaw arranged on the mounting seat and a driving device used for driving the jaw, the clamping jaws comprise a middle clamping jaw, an upper clamping jaw and a lower clamping jaw, wherein the middle clamping jaw extends or retracts on the installation base under the control of the driving device, the upper clamping jaw and the lower clamping jaw synchronously swing on the installation base under the control of the driving device, and the swinging directions of the upper clamping jaw and the lower clamping jaw are opposite or back to each other. This application has when using digit control machine tool processing work piece, avoids the vibrations that processing produced to cause the effect of work piece center skew.

Description

Numerical control machine tool

Technical Field

The application relates to the field of numerical control machine tools, in particular to a self-centering center frame numerical control machine tool.

Background

The numerical control machine tool is a numerical control machine tool for short, is an automatic machine tool with a program control system, when the numerical control machine tool is used for processing a machined part, the processing precision needs to be ensured as much as possible, if the Chinese patent with the publication number of CN102476186A and the application date of 2010, 11 and 22 discloses a novel numerical control machine tool, the numerical control machine tool comprises a main shaft box of a main shaft, a machine tool body, a tool rest, a gearbox, a control console and a tailstock, and is characterized in that the main shaft is connected with a pulsation device and a transmission chain, a stepping motor and a feed motion lead screw are connected through a motor output end configured reducer, a transverse feed system and a longitudinal feed system are driven by ball screws, and the tailstock adopts a controllable electric tailstock.

With respect to the related art among the above, the inventors consider that the following drawbacks exist:

when above-mentioned digit control machine tool need process the work piece, because the work piece is mostly the great member of length, and adopt one end centre gripping, the mode that the other end was established to support realizes the location, and in the course of working, the lathe tool can be followed the activity of work piece length direction and cut the work piece, in the cutting process, inevitable can produce the resistance, the longer rigidity of work piece is more weak in addition, consequently the resistance that produces in the cutting process can form radial force and lead to the work piece to take place deformation, and then produce vibrations, the central skew appears in making the work piece course of working, influence the machining precision.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the vibration during machining causes the center of a workpiece to deviate, the application provides a numerical control machine tool.

The application provides a digit control machine tool adopts following technical scheme:

a numerical control machine tool comprises a machine body, a tool apron, a turning tool and a clamping device, wherein the turning tool is arranged on the tool apron, the clamping device is used for clamping a workpiece, a sliding guide rail is arranged on the machine body, a sliding seat is movably arranged on the sliding guide rail, the tool apron is fixedly connected with the sliding seat, a self-centering center frame used for clamping the workpiece is arranged on the sliding seat, the self-centering center frame comprises an installation seat, clamping jaws arranged on the installation seat and a driving device used for driving the clamping jaws, the clamping jaws comprise middle clamping jaws controlled by the driving device to extend or retract on the installation seat, and upper clamping jaws and lower clamping jaws controlled by the driving device to synchronously swing on the installation seat, the middle clamping jaws are positioned on a horizontal plane where a central line of the workpiece is positioned, and the swinging directions of the upper clamping jaws and the lower clamping jaws are opposite or back to each other, in a clamping state, the mutual spacing angle between the contact points of the upper clamping jaw and the workpiece as well as the mutual spacing angle between the contact points of the lower clamping jaw and the workpiece as well as the contact points of the middle clamping jaw and the workpiece are the same and are both larger than 90 degrees.

By adopting the technical scheme, the self-centering center frame for assisting in clamping and centering the workpiece is additionally arranged on the numerical control machine tool, and the self-centering center frame and the tool apron are both arranged on the sliding seat, so that the self-centering center frame and the tool apron can synchronously move, the matching of the self-centering center frame and a turning tool is ensured, and a better centering effect is achieved; when the self-centering center frame starts to work, the driving device controls the upper clamping jaw and the lower clamping jaw to synchronously swing oppositely or back to back, the middle clamping jaw abuts against the horizontal cross section where the center of the workpiece is located, the upper clamping jaw and the lower clamping jaw are clamped, and because in the clamping state, the angle between the contact points of the upper clamping jaw and the middle clamping jaw and the workpiece is mutually spaced, the angle between the contact points of the lower clamping jaw and the middle clamping jaw and the workpiece is the same as that between the contact points of the lower clamping jaw and the workpiece is mutually spaced, and the angles are all larger than 90 degrees, the clamping is more stable, and the center of the workpiece is not easy to deviate.

Optionally, the self-centering center frame includes a motor and a lead screw connected to a rotating shaft of the motor, and the motor is the driving device; well jack catch axial slides, circumference is injectd and is installed on the mount pad, well jack catch slides and connects on the lead screw, it is provided with two connecting rods to rotate to connect on the well jack catch, two the connecting rod is kept away from the one end of well jack catch respectively with go up the jack catch with the jack catch rotates down to be connected, go up the jack catch with the jack catch rotates respectively to be connected the inner wall both ends of mount pad down.

Through adopting above-mentioned technical scheme, motor drive has the advantage that convenience, cleanness, small, turns into linear motion with the rotation of motor through the lead screw, and the jack catch is along axial displacement in the drive, and well jack catch passes through link mechanism and drives jack catch and lower jack catch and do the swing of relative or carrying on the back mutually, and link mechanism is relatively more wear-resisting, can increase of service life.

Optionally, the middle clamping jaw comprises a middle and upper clamping jaw and a middle and lower clamping jaw, the middle and lower clamping jaw is connected to the screw rod in a sliding manner, and the two connecting rods are mounted on the middle and lower clamping jaw; the middle and upper clamping jaws penetrate through the circumferential limit of the nut and are inserted in the clamping jaw grooves, and external threads matched with the internal threads of the nut are tapped on the middle and upper clamping jaws.

Through adopting above-mentioned technical scheme, because the nut rotates to be connected in well lower jack catch, thereby the accessible nut is rotatory to make well upper jack catch carry out the displacement, because well upper jack catch circumference is spacing, consequently well upper jack catch can only carry out linear motion and can not rotate, just so can finely tune the length of centering jack catch before the centre frame centre gripping of feeling relieved, make from the centre frame of feeling relieved can agree with the work piece of the big or small cross-section of different shapes, location to the work piece center is more accurate.

Optionally, the upper jaw, the middle jaw and one end of the lower jaw, which is far away from the mounting seat, are provided with rollers for contacting with a workpiece.

Through adopting above-mentioned technical scheme, the work piece need rotate at a high speed when the lathe work, and the gyro wheel butt work piece can cooperate the rotation of work piece to roll, avoids the work piece to rotate and causes wearing and tearing to three jack catch.

Optionally, the upper jaw, the middle jaw and the lower jaw are provided with roller grooves at ends far away from the mounting base, the roller is rotatably mounted in the roller groove, and the side surface of the roller protrudes out of the roller groove.

By adopting the technical scheme, the roller is positioned in the roller groove and is prevented from being completely exposed, and the roller groove plays a role in protecting the roller.

Optionally, the upper jaw, the middle jaw and one end of the lower jaw, which is far away from the mounting seat, are in a major arc shape.

Through adopting above-mentioned technical scheme, the most area of gyro wheel has been wrapped up inside the jack catch, and only outwards protrusion a small part can effectively dodge the work piece like this, plays better guard action.

Optionally, the outer sides of the rollers of the upper jaw and the lower jaw are provided with cushion blocks, the cushion blocks are provided with protection sheets, the two protection sheets are obliquely arranged, one side of each protection sheet is abutted to the roller groove of the upper jaw and the roller groove of the lower jaw, and the two protection sheets are inclined in the same direction.

Through adopting above-mentioned technical scheme, set up the cushion and can install the protection piece better, the protection piece can stop the smear metal to get into the gyro wheel groove, be drawn into the gyro wheel.

Optionally, waist-shaped holes are respectively formed in two sides of the protection sheet, and the protection sheet penetrates through the waist-shaped holes through bolts to be connected to the cushion blocks.

Through adopting above-mentioned technical scheme, the protection piece can slide the adjustment along the direction in waist type hole, even the protection piece is along with using wearing and tearing like this, also can carry out position control, ensures that the smear metal is not drawn into the gyro wheel.

In summary, the present application includes at least one of the following beneficial technical effects:

when the numerical control machine tool is used for processing a workpiece, the lathe tool cannot cause the center of the workpiece to deviate due to vibration generated by the lathe tool on the processing part, and the influence on the processing precision is reduced.

Drawings

FIG. 1 is a schematic diagram of the outline structure of a numerical control machine tool.

Fig. 2 is a schematic diagram of the outline structure of the self-centering steady rest.

FIG. 3 is a schematic diagram of a self-centering steady rest drive configuration.

Fig. 4 is a schematic view of a structure of a clamping jaw in the self-centering center frame.

FIG. 5 is a cross-sectional view of a jaw from the centering steady.

Reference numerals: 100. a bed body; 200. a tool apron; 210. turning a tool; 300. a clamping device; 400. a sliding guide rail; 500. a sliding seat; 600. a self-centering steady rest; 610. a mounting seat; 620. a motor; 630. a lead screw; 631. a lead screw slider; 700. a claw; 710. an upper jaw; 720. a lower jaw; 730. a middle claw; 731. a middle-upper jaw; 732. a middle and lower jaw; 733. a nut; 734. a jaw slot; 735. a fastening groove; 736. a buckle projection; 737. a limiting groove; 738. a limiting bump; 800. a connecting rod; 900. a roller; 910. a roller groove; 920. cushion blocks; 930. a protective sheet; 931. a kidney-shaped hole.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

Example 1: the embodiment of the application discloses digit control machine tool, refer to fig. 1, including lathe bed 100, blade holder 200, lathe tool 210 and to the clamping device 300 that the work piece one end centre gripping other end supported tightly, lathe tool 210 installs on blade holder 200, clamping device 300 installs on lathe bed 100, be provided with the guide rail 400 that slides on lathe bed 100, the guide rail 400 that slides is located between clamping device 300 both ends, the seat 500 that slides is installed in the last removal of guide rail 400 that slides, blade holder 200 installs on the seat 500 that slides, it is from centering frame 600 to install on the seat 500 that slides.

Referring to fig. 2, the self-centering steady rest 600 comprises a mounting seat 610, a jaw 700, a lead screw 630 and a motor 620, wherein the mounting seat 610 is fixedly connected and mounted on the sliding seat 500, the jaw 700 is mounted on the mounting seat 610, and the jaw 700 comprises an upper jaw 710, a lower jaw 720 and a middle jaw 730; the motor 620 is fixedly arranged on the sliding seat 500, a rotating shaft of the motor 620 is connected with the lead screw 630, the lead screw 630 is provided with a lead screw sliding block 631 in a sliding fit manner, the lead screw sliding block 631 is fixedly connected with the middle clamping jaw 730, two sides of the middle clamping jaw 730 are limited by the mounting seat 610 and cannot rotate circumferentially, and the motor 620 drives the middle clamping jaw 730 to do linear extension/contraction motion on the mounting seat 610 through the lead screw 630.

Referring to fig. 3, two connecting rods 800 are connected to the middle claw 730 through a rotating shaft, one ends of the two connecting rods 800, which are far away from the middle claw 730, are respectively connected to the upper claw 710 and the lower claw 720 through rotating shafts, and the upper claw 710 and the lower claw 720 are respectively connected to two ends of the inner wall of the mounting seat 610 through rotating shafts. The motor 620 drives the middle claw 730 through the screw 630, and the linear motion of the middle claw 730 drives the upper claw 710 and the lower claw 720 to synchronously swing on the mounting base 610 in opposite directions or in opposite directions. In the clamping state, the center jaw 730 and the workpiece center line are located on the same horizontal plane, and the upper jaw 710 and the center jaw 730 are spaced from the workpiece at the same angle, and the lower jaw 720 and the center jaw 730 are spaced from the workpiece at the same angle, which is greater than 90 °.

The end of the upper claw 710, the middle claw 730 and the lower claw 720 far away from the mounting base 610 is provided with a roller groove 910, the roller groove 910 is internally connected with a roller 900 through a rotating shaft, the side surface of the roller 900 protrudes out of the roller groove 910, and the end of the upper claw 710, the middle claw 730 and the lower claw 720 far away from the mounting base 610 wraps the roller 900 in a major arc shape.

The implementation principle of a numerical control machine tool in the embodiment of the application is as follows:

when the numerical control machine tool is used for processing a workpiece, one end of the workpiece is clamped, the other end of the workpiece is abutted against the clamping device 300, then the self-centering center frame 600 is used for centering the workpiece, when the self-centering center frame 600 is used for centering, the motor 620 converts rotation driving into linear driving through the lead screw 630 to drive the middle clamping jaw 730 to axially displace, the middle clamping jaw 730 drives the upper clamping jaw 710 and the lower clamping jaw 720 to swing oppositely or back to back through the connecting rod 800 mechanism, the roller 900 on the middle clamping jaw 730 abuts against a workpiece on the horizontal cross section where the center of the workpiece is located, the rollers 900 on the upper clamping jaw 710 and the lower clamping jaw 720 both clamp and abut against the workpiece, after centering and clamping are completed, the clamping device 300 drives the workpiece to rotate, the roller 900 rolls in a matching manner, the turning tool 210 starts to feed, when the turning tool 210 machines a workpiece, the self-centering center frame 600 and the tool holder 200 move synchronously to cooperate with the turning of the turning tool 210.

Example 2: referring to fig. 4, the difference from embodiment 1 is that a cushion block 920 is disposed on the outer side of each of the rollers 900 of the upper jaw 710 and the lower jaw 720, a protection plate 930 is disposed on the cushion block 920, waist-shaped holes 931 are respectively disposed on both sides of the protection plate 930, a bolt passes through the waist-shaped holes 931 to connect the protection plate 930 to the cushion block 920, one side of each of the two protection plates 930 abuts against the roller groove 910 of the upper jaw 710 and the roller groove 910 of the lower jaw 720, the protection plate 930 of the upper jaw 710 faces the workpiece, and the two protection plates 930 face the same direction.

when the workpiece is turned, the protection sheet 930 is tightly attached to the roller groove 910, so as to prevent the chips from being drawn into the roller 900, and when the protection sheet 930 is worn along with the use, the protection sheet 930 can be slid along the direction of the waist-shaped hole 931 to adjust the position, so that the protection sheet 930 is always tightly attached to the roller groove 910.

Example 3: referring to fig. 4, the difference from embodiment 1 is that the middle latch 730 includes a middle and upper latch 731 and a middle and lower latch 732, the middle and lower latch 732 is integrally connected to the screw slider 631, but is not limited thereto, the middle and lower latch 732 and the screw slider 631 may be connected by welding, and the two links 800 are connected to the middle and lower latch 732 through a rotating shaft.

Referring to fig. 5, a middle and lower claw 732 is provided with a claw groove 734, the outer periphery of the claw groove 734 is provided with a fastening groove 735, the fastening groove 735 is internally fastened with a fastening protrusion 736, the fastening protrusion 736 is integrally connected with a nut 733, but not limited to this, the fastening protrusion 736 and the nut 733 can also be welded, the nut 733 is tapped with an internal thread, the middle and upper claw 731 passes through the nut 733 and is inserted into the claw groove 734, the inner wall of the claw groove 734 is provided with a limit groove 737, the middle and upper claw 731 is integrally provided with a limit protrusion 738 matching with the limit groove 737, and the middle and upper claw 731 is tapped with an external thread matching with the internal thread of the nut 733.

when the length of the middle clamping jaw 730 needs to be adjusted independently before clamping by using the self-centering center frame 600, the nut 733 is rotated by using a wrench or other tools, the nut 733 is axially limited, the circumferential rotation of the nut 733 drives the middle-upper clamping jaw 731 to move, and the middle-upper clamping jaw 731 is circumferentially limited, so that the middle-upper clamping jaw 731 is axially displaced, and the independent adjustment of the middle clamping jaw 730 is completed.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a numerical control machine tool, is in including lathe bed (100), blade holder (200), setting lathe tool (210) on blade holder (200) and clamping device (300) that are used for the centre gripping work piece, clamping device (300) set up on lathe bed (100), be provided with slide guide rail (400) on lathe bed (100), the removal is installed on slide guide rail (400) and is slided seat (500), blade holder (200) with slide seat (500) fixed connection, its characterized in that: the self-centering center frame (600) for clamping a workpiece is mounted on the sliding seat (500), the self-centering center frame (600) comprises a mounting seat (610), a jaw (700) arranged on the mounting seat (610) and a driving device for driving the jaw (700), the jaw (700) comprises a middle jaw (730) controlled by the driving device to extend/retract on the mounting seat (610), and an upper jaw (710) and a lower jaw (720) controlled by the driving device to synchronously swing on the mounting seat (610), the middle jaw (730) is located on a horizontal plane where a workpiece center line is located, the swinging directions of the upper jaw (710) and the lower jaw (720) are opposite or opposite, and in a clamping state, the upper jaw (710) and a contact point of the middle jaw (730) and the workpiece are mutually spaced at an angle, and the lower jaw (720) and a contact point of the middle jaw (730) and the workpiece are mutually spaced at the same angle And are all greater than 90.

2. The numerical control machine tool according to claim 1, characterized in that: the self-centering center frame (600) comprises a motor (620) and a lead screw (630) connected to a rotating shaft of the motor (620), and the motor (620) is the driving device; well jack catch (730) axial slip, circumference are injectd and are installed on mount pad (610), well jack catch (730) slip connect in lead screw (630) is last, well jack catch (730) go up to rotate to be connected and are provided with two connecting rods (800), two connecting rod (800) are kept away from the one end of well jack catch (730) respectively with go up jack catch (710) with lower jack catch (720) rotate to be connected, go up jack catch (710) with lower jack catch (720) rotate respectively to be connected the inner wall both ends of mount pad (610).

3. The numerically controlled machine tool according to claim 2, characterized in that: the middle clamping jaw (730) comprises a middle and upper clamping jaw (731) and a middle and lower clamping jaw (732), the middle and lower clamping jaw (732) is connected to the lead screw (630) in a sliding mode, and the two connecting rods (800) are installed on the middle and lower clamping jaws (732); the middle and lower clamping jaw (732) is provided with a clamping jaw groove (734), the opening surface of the clamping jaw groove (734) is rotatably connected with a nut (733) with an internal thread, the middle and upper clamping jaw (731) penetrates through the nut (733) to be circumferentially limited and inserted into the clamping jaw groove (734), and the middle and upper clamping jaw (731) is provided with an external thread matched with the internal thread of the nut (733).

4. The numerical control machine tool according to claim 1, characterized in that: and one ends of the upper jaw (710), the middle jaw (730) and the lower jaw (720) far away from the mounting seat (610) are provided with rollers (900) used for contacting with a workpiece.

5. The numerical control machine tool according to claim 4, characterized in that: the end, far away from the mounting base (610), of the upper clamping jaw (710), the middle clamping jaw (730) and the lower clamping jaw (720) is provided with a roller groove (910), the roller (900) is rotatably mounted in the roller groove (910), and the side surface of the roller (900) protrudes out of the roller groove (910).

6. The numerical control machine tool according to claim 5, characterized in that: the end, far away from the mounting seat (610), of the upper clamping jaw (710), the middle clamping jaw (730) and the lower clamping jaw (720) is in a major arc shape.

7. The numerical control machine tool according to claim 6, characterized in that: the outer sides of the rollers (900) of the upper clamping jaw (710) and the lower clamping jaw (720) are respectively provided with a cushion block (920), the cushion block (920) is respectively provided with a protection sheet (930), the two protection sheets (930) are obliquely arranged, one sides of the two protection sheets (930) are respectively abutted against the roller grooves (910) on the upper clamping jaw (710) and the lower clamping jaw (720), and the oblique directions of the two protection sheets (930) are the same.

8. The numerically controlled machine tool according to claim 7, wherein: waist-shaped holes (931) are respectively formed in two sides of the protection sheet (930), and the protection sheet (930) penetrates through the waist-shaped holes (931) through bolts to be connected to the cushion block (920).