CN112338588A

CN112338588A - Clamping device for machining of numerical control machine tool

Info

Publication number: CN112338588A
Application number: CN202011152648.2A
Authority: CN
Inventors: 刘斌
Original assignee: Shenzhen Lidong Technology Development Co ltd
Current assignee: Shenzhen Lidong Technology Development Co ltd
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2021-02-09

Abstract

A clamping device for machining of a numerical control machine tool comprises a plurality of groups of supporting columns, a rotating shaft, a rotating disk, a first mounting plate, two groups of top plates and a second mounting plate; the multiple groups of support columns are respectively connected with the base and the multiple groups of assembly plates; the rotating shaft is rotatably connected with the base and is in transmission connection with the first driving device; a rotating disc connected with the rotating shaft is provided with a moving assembly for driving the two groups of first mounting plates to move; two groups of lower clamping parts are arranged on the end surface of each group of first mounting plates in a sliding manner; two groups of first telescopic devices for driving the two groups of lower clamping parts to move are arranged on the first mounting plate; the first mounting plate is connected with the top plate through a connecting rod; a plurality of groups of lifting devices for driving the two groups of second mounting plates to move are respectively arranged on the two groups of top plates; two groups of upper clamping parts are arranged on the end surface of each group of second mounting plates in a sliding manner; two groups of second telescopic devices used for driving the two groups of upper clamping parts to move are arranged on the second mounting plate. The clamping device can rapidly clamp the workpiece with the square or circular cross section.

Description

Clamping device for machining of numerical control machine tool

Technical Field

The invention relates to the technical field of numerical control machines, in particular to a clamping device for machining of a numerical control machine.

Background

The numerical control machine tool is a digital control machine tool for short, and is an automatic machine tool provided with a program control system. The control system is capable of logically processing and decoding a program defined by a control code or other symbolic instructions, represented by coded numbers, which are input to the numerical control device via the information carrier. After operation processing, the numerical control device sends out various control signals to control the action of the machine tool, and parts are automatically machined according to the shape and the size required by the drawing; when a numerically-controlled machine tool is used for processing a rectangular or cylindrical workpiece, the workpiece needs to be clamped and fixed by using a clamping device so as to be convenient for the numerically-controlled machine tool to process the workpiece, but the existing clamping device is inconvenient to use, and when workpieces with different cross sections are clamped, parts of the clamping device need to be continuously replaced, so that time and labor are wasted, and the production efficiency of the workpiece is greatly reduced; therefore, the application provides a clamping device for machining of a numerical control machine tool.

Disclosure of Invention

Objects of the invention

The clamping device for machining the numerical control machine tool can quickly clamp a workpiece with a square or circular cross section, and can quickly clamp and position the workpiece to be clamped without replacing parts of the clamping device.

(II) technical scheme

In order to solve the problems, the invention provides a clamping device for machining a numerical control machine tool, which comprises a base, a plurality of groups of supporting columns, a plurality of groups of assembling plates, a first driving device, a rotating shaft, a rotating disc, a first mounting plate, a plurality of groups of connecting rods, two groups of top plates and a second mounting plate;

one ends of the support columns are connected with the base, and the other ends of the support columns are connected with the assembling plates respectively; one end of the rotating shaft is rotatably connected with the base, and the rotating shaft is in transmission connection with the first driving device; the first driving device is connected with the base; the other end of the rotating shaft is connected with the rotating disc; the rotating disc is provided with moving assemblies for driving the two groups of first mounting plates to mutually move away from or approach to each other along the diameter direction of the rotating disc; the two groups of first mounting plates are distributed side by side;

two groups of lower clamping parts are arranged on the end surface of each group of first mounting plates side by side; the two groups of lower clamping parts are both connected with the first mounting plate in a sliding manner, and the end surfaces, close to each other, of the two groups of lower clamping parts are both provided with a first clamping groove; each group of first clamping grooves is provided with an opening on the side end face of the right-angle corner of each group of lower clamping parts for forming a first clamping space which is matched and coated on the right-angle corner of the workpiece to be processed, and the bottom surface of each group of first clamping grooves is provided with a second clamping groove; the inner wall of the second clamping groove is a curved surface; under the state that the two groups of lower clamping parts are close to each other, the two groups of second clamping grooves form a placing space for placing the cylindrical workpiece; the first mounting plate is provided with two groups of first telescopic devices for driving the two groups of lower clamping parts to approach or depart from each other;

the multiple groups of connecting rods are respectively connected with the two groups of first mounting plates and the two groups of top plates; the two groups of top plates and the two groups of first mounting plates are in one-to-one correspondence and are parallel to each other, and a plurality of groups of lifting devices for driving the two groups of second mounting plates to move towards or away from the two groups of first mounting plates are respectively arranged on the end surfaces of the two groups of top plates facing the two groups of first mounting plates;

two groups of upper clamping parts are arranged on the end surface of each group of second mounting plates facing the first mounting plate side by side; the two groups of upper clamping parts are both connected with the second mounting plate in a sliding manner, and the end surfaces, close to each other, of the two groups of upper clamping parts are both provided with a third clamping groove; each group of third clamping grooves is provided with an opening on the side end face of the right-angle corner of each group of upper clamping parts for forming a second clamping space which is matched and coated on the right-angle corner of the workpiece to be processed, and the bottom surface of each group of third clamping grooves is provided with a fourth clamping groove; the inner wall of the fourth clamping groove is a curved surface; under the state that the two groups of upper clamping parts are close to each other, the two groups of fourth clamping grooves form a pressing space for pressing the cylindrical workpiece; wherein, be equipped with two sets of second telescoping devices that are used for driving two sets of upper clamping parts and are close to each other or keep away from each other on the second mounting panel.

Preferably, the two sets of second mounting plates are respectively connected with the plurality of sets of connecting rods in a sliding manner.

Preferably, each group of assembly plates is provided with a plurality of groups of assembly holes.

Preferably, a first protective cover is covered on the outer side of the first driving device; the base is connected to first protection casing, is equipped with first louvre on the first protection casing, is equipped with the first layer of making an uproar of falling on the inner wall of first protection casing.

Preferably, the device also comprises a plurality of groups of supporting rods and a plurality of groups of sliding blocks; wherein, the end surface of the rotating disc facing the base is provided with an annular chute;

the multiple groups of support rods are uniformly distributed in a circumferential manner by taking the central axis of the rotating shaft as a center, one ends of the multiple groups of support rods are connected with the base, and the other ends of the multiple groups of support rods are respectively connected with the multiple groups of sliding blocks; the multiple groups of sliding blocks are all connected with the sliding grooves in a sliding mode.

Preferably, the moving assembly comprises a second driving device, two groups of fixed plates, a threaded rod and two groups of sliding plates;

two ends of the threaded rod are respectively and rotatably connected with two groups of fixing plates; the two groups of fixed plates are connected with the rotating disc; the central axis direction of the threaded rod is overlapped with the diameter direction of the rotating disc, and one end of the threaded rod penetrates through one group of fixing plates and is in transmission connection with a second driving device; the second driving device is connected with the fixing plate; the threaded rod between the two groups of fixed plates is respectively provided with reverse external threads towards the two ends of the threaded rod in the direction of the central axis of the rotating disc;

the two groups of sliding plates are respectively connected with the two groups of first mounting plates, the two groups of sliding plates are both connected with the rotating disk in a sliding mode, and the two groups of sliding plates are respectively in threaded fit with the reverse external threads on the connecting threaded rods.

Preferably, a second protective cover is covered on the outer side of the second driving device; the second protection casing is connected with the fixed plate, is provided with a second radiating hole, and is provided with a second noise reduction layer on the inner wall of the second protection casing.

Preferably, the inner walls of the two groups of first clamping grooves and the two groups of third clamping grooves are provided with first elastic pads.

Preferably, the inner walls of the two groups of second clamping grooves and the inner walls of the two groups of fourth clamping grooves are provided with second elastic pads.

Preferably, the use method of the clamping device for the numerical control machine tool machining comprises the following specific steps:

s1, moving the workpiece to be machined to the position right above the rotating disc after being clamped by the manipulator, and starting the first driving device to adjust the positions of the two groups of lower clamping parts so that the two groups of lower clamping parts are positioned on two sides of the projection of the workpiece to be machined on the rotating disc;

s2, the moving assembly drives the two groups of first mounting plates to move close to each other, and meanwhile, the multiple groups of first telescopic devices operate to push the four groups of lower clamping parts to move close to each other; the mechanical arm drives the workpiece to be processed to move towards the rotating disc until two ends of the workpiece to be processed are respectively accommodated in the first clamping space or the placing space in a matched manner;

s3, the multiple groups of second telescopic devices operate to push the four groups of upper clamping parts to move close to each other until the four groups of upper clamping parts are respectively positioned right above the four groups of lower clamping parts; the operation of the plurality of groups of lifting devices drives the two groups of second mounting plates to move towards the two groups of first mounting plates until the inner walls of the second clamping spaces or the inner walls of the pressing spaces press the workpieces to be processed.

The technical scheme of the invention has the following beneficial technical effects:

according to the device, the device is installed on a numerical control machine tool in a matched mode through bolts matched with assembling holes formed in a plurality of groups of assembling plates, a workpiece to be machined is clamped by a mechanical arm and then moves to the position right above a rotating disc, a moving assembly drives two groups of first installing plates to move close to each other, the distance between the two groups of first installing plates is adjusted, and meanwhile, a plurality of groups of first telescopic devices operate to push four groups of lower clamping parts to move close to each other; the manipulator drives the workpiece to be processed to move towards the rotating disc, and when the cross section of the workpiece to be processed is square, the workpiece is fixed by respectively pressing eight right-angle sides of the workpiece through four groups of upper clamping parts and four groups of lower clamping parts; if the cross section of the processed workpiece is circular, placing the workpiece in second clamping grooves on the four groups of lower clamping parts, and clamping and pressing the workpiece by using the four groups of upper clamping parts; therefore, the requirement of quickly clamping a workpiece with a circular or square cross section can be met on the basis of not disassembling and replacing the device part, and the device is simple to operate and convenient to use.

Drawings

Fig. 1 is a schematic structural diagram of a clamping device for machining a numerical control machine tool according to the present invention.

Fig. 2 is a partially enlarged structural schematic diagram of a part a of the clamping device for machining of the numerical control machine tool according to the present invention.

Fig. 3 is a schematic structural diagram of the upper clamping portion and the lower clamping portion of the clamping device for machining of the numerical control machine tool, which are provided by the invention, installed in a matching manner.

Fig. 4 is a schematic perspective view of a lower clamping portion of a clamping device for machining a numerical control machine tool according to the present invention.

Reference numerals: 1. a base; 2. a support pillar; 3. assembling a plate; 4. an assembly hole; 5. a first driving device; 6. a first shield; 7. a rotating shaft; 8. a support bar; 9. rotating the disc; 10. a second driving device; 11. a fixing plate; 12. a threaded rod; 13. a first mounting plate; 14. a connecting rod; 15. a top plate; 16. a lifting device; 17. a sliding plate; 18. a second clamping groove; 19. a lower clamping portion; 20. a first clamping groove; 21. an upper clamping portion; 22. a first telescoping device; 23. a second telescoping device; 24. a second mounting plate; 25. a fourth clamping groove; 26. and a third clamping groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

As shown in fig. 1 to 4, the clamping device for machining of a numerical control machine tool provided by the invention comprises a base 1, a plurality of groups of supporting columns 2, a plurality of groups of assembling plates 3, a first driving device 5, a rotating shaft 7, a rotating disc 9, a first mounting plate 13, a plurality of groups of connecting rods 14, two groups of top plates 15 and a second mounting plate 24;

one ends of the support columns 2 are connected with the base 1, and the other ends of the support columns 2 are connected with the assembling plates 3; one end of the rotating shaft 7 is rotatably connected with the base 1, and the rotating shaft 7 is in transmission connection with the first driving device 5; the first driving device 5 selects a variable frequency motor, the first driving device 5 is connected with the base 1, and the first driving device 5 drives the rotating shaft 7 and the rotating disk 9 to rotate so as to adjust the positions of the two groups of first mounting plates 13;

the other end of the rotating shaft 7 is connected with a rotating disc 9; the rotating disc 9 is provided with moving components for driving the two groups of first mounting plates 13 to move away from or close to each other along the diameter direction of the rotating disc 9; the two groups of first mounting plates 13 are distributed side by side;

two groups of lower clamping parts 19 are arranged on the end surface of each group of first mounting plates 13 side by side; the two groups of lower clamping parts 19 are both connected with the first mounting plate 13 in a sliding manner, and the mutually close end surfaces of the two groups of lower clamping parts 19 are both provided with a first clamping groove 20; each group of first clamping grooves 20 is provided with an opening on the end face of the right-angled corner side of each group of lower clamping parts 19 for forming a first clamping space which is matched and coated at the right-angled corner of the workpiece to be processed, and the bottom surface of each group of first clamping grooves 20 is provided with a second clamping groove 18; the inner wall of the second holding groove 18 is a curved surface; under the state that the two groups of lower clamping parts 19 are close to each other, the two groups of second clamping grooves 18 form a placing space for placing the cylindrical workpiece; wherein, two groups of first telescopic devices 22 for driving the two groups of lower clamping parts 19 to approach or depart from each other are arranged on the first mounting plate 13; the first expansion device 22 is selected from but not limited to a cylinder;

the multiple groups of connecting rods 14 are respectively connected with the two groups of first mounting plates 13 and the two groups of top plates 15; the two groups of top plates 15 and the two groups of first mounting plates 13 are in one-to-one correspondence and are parallel to each other, and a plurality of groups of lifting devices 16 for driving the two groups of second mounting plates 24 to move towards or away from the two groups of first mounting plates 13 are respectively arranged on the end surfaces, facing the two groups of first mounting plates 13, of the two groups of top plates 15; the lifting device 16 is selected from, but not limited to, a hydraulic cylinder;

two groups of upper clamping parts 21 are arranged on the end surface of each group of second mounting plates 24 facing the first mounting plate 13 side by side; the two groups of upper clamping parts 21 are both connected with the second mounting plate 24 in a sliding manner, and the mutually close end surfaces of the two groups of upper clamping parts 21 are both provided with a third clamping groove 26; each group of third clamping grooves 26 is provided with an opening on the end face of the right-angle corner side of each group of upper clamping part 21 for forming a second clamping space which is matched and coated at the right-angle corner of the workpiece to be processed, and the bottom surface of each group of third clamping grooves 26 is provided with a fourth clamping groove 25; the inner wall of the fourth holding groove 25 is a curved surface; under the state that the two groups of upper clamping parts 21 are close to each other, the two groups of fourth clamping grooves 25 form a pressing space for pressing the cylindrical workpiece; wherein, two groups of second telescopic devices 23 for driving the two groups of upper clamping parts 21 to approach or depart from each other are arranged on the second mounting plate 24; the second expansion device 23 is selected from but not limited to a cylinder;

it should be noted that, the end surfaces of the two sets of upper clamping portions 21 and the two sets of lower clamping portions 19 which are close to each other are attached to each other, so that the two sets of first clamping grooves 20 and the two sets of third clamping grooves 26 form a groove with a rectangular cross section; the two groups of second clamping grooves 18 form semicircular grooves for placing cylindrical workpieces; the two groups of fourth clamping grooves 25 are encircled to form semicircular grooves for pressing cylindrical workpieces.

In the invention, the device is arranged on a numerical control machine tool in a matching way through a plurality of groups of assembling plates 3, a workpiece to be processed is clamped by a manipulator and then moves to the position right above a rotating disc 9, and a first driving device 5 is started to adjust the positions of two groups of lower clamping parts 19, so that the two groups of lower clamping parts 19 are positioned at two sides of the projection of the workpiece to be processed on the rotating disc 9; the moving assembly drives the two groups of first mounting plates 13 to move close to each other, so as to adjust the distance between the two groups of first mounting plates 13, and meanwhile, the plurality of groups of first telescopic devices 22 operate to push the four groups of lower clamping parts 19 to move close to each other; the mechanical arm drives the workpiece to be processed to move towards the rotating disc 9 until two ends of the workpiece to be processed are respectively accommodated in the first clamping space or the placing space in a matched manner; when the cross section of the workpiece is square, the workpiece is accommodated in the first clamping space in a matching way, and when the cross section of the workpiece is circular, the workpiece is accommodated in the placing space in a matching way; the multiple groups of second telescopic devices 23 operate to push the four groups of upper clamping parts 21 to move close to each other until the four groups of upper clamping parts 21 are respectively positioned right above the four groups of lower clamping parts 19; the operation of multiunit elevating gear 16 drives two sets of second mounting panels 24 and removes towards two sets of first mounting panels 13, compresses tightly the work piece of treating processing until the inner wall in second centre gripping space or the inner wall that compresses tightly the space, and the rethread numerical control machine tool on be equipped with processingequipment to the work piece process can, easy operation convenient to use can satisfy the needs to circular or square work piece centre gripping, and conveniently carries out the centre gripping location to the work piece.

In an alternative embodiment, the two sets of second mounting plates 24 are slidably connected to the plurality of sets of connecting rods 14, respectively, to improve the stability of the two sets of second mounting plates 24 when moving up and down.

In an optional embodiment, each set of assembling plates 3 is provided with a plurality of sets of assembling holes 4, and the assembling plates 3 are installed with the numerical control machine tool in a matched mode through the plurality of sets of assembling holes 4 which are provided and matched with bolts, so that the device is convenient to disassemble.

In an alternative embodiment, the outside of the first driving device 5 is covered with a first protective cover 6; base 1 is connected to first protection casing 6, is equipped with first louvre on the first protection casing 6, is equipped with the first layer of making an uproar that falls on the inner wall of first protection casing 6, and the noise that first protection casing 6 that is equipped with produced the operation of first drive arrangement 5 falls and makes an uproar to protect first drive arrangement 5.

In an optional embodiment, the device further comprises a plurality of groups of supporting rods 8 and a plurality of groups of sliding blocks; wherein, the end surface of the rotating disc 9 facing the base 1 is provided with an annular chute;

the multiple groups of support rods 8 are uniformly distributed in a circumferential manner by taking the central axis of the rotating shaft 7 as the center, one ends of the multiple groups of support rods 8 are connected with the base 1, and the other ends of the multiple groups of support rods 8 are respectively connected with the multiple groups of sliding blocks; the multiple groups of sliding blocks are all connected with the sliding chute in a sliding manner; when the rotating disk 9 rotates, the sliding blocks are supported by the groups of sliding blocks and the sliding grooves in the rotating disk 9 in sliding fit through the groups of supporting rods 8, so that the stability of the rotating disk 9 during rotating motion is improved.

In an alternative embodiment, the moving assembly comprises a second driving means 10, two sets of fixed plates 11, threaded rods 12 and two sets of sliding plates 17;

two ends of the threaded rod 12 are respectively and rotatably connected with two groups of fixing plates 11; the two groups of fixed plates 11 are connected with the rotating disc 9; the central axis direction of the threaded rod 12 is overlapped with the diameter direction of the rotating disc 9, and one end of the threaded rod 12 penetrates through one group of the fixing plates 11 and is in transmission connection with the second driving device 10; the second driving device 10 is connected with the fixing plate 11; the threaded rod 12 positioned between the two groups of fixed plates 11 is respectively provided with reverse external threads towards the two ends of the rotating disk 9 in the direction of the central axis thereof;

the two groups of sliding plates 17 are respectively connected with the two groups of first mounting plates 13, the two groups of sliding plates 17 are both connected with the rotating disk 9 in a sliding manner, and the two groups of sliding plates 17 are respectively in threaded fit with reverse external threads on the threaded rod 12;

the second driving device 10 selects a variable frequency motor, the second driving device 10 operates to drive the threaded rod 12 to rotate, two groups of sliding plates 17 which are in threaded fit connection on the threaded rod 12 move close to or away from each other, and then two groups of first mounting plates 13 are driven to move close to or away from each other.

In an alternative embodiment, the outside of the second driving device 10 is covered with a second protective cover; the second protection casing is connected with the fixing plate 11, the second protection casing is provided with a second heat dissipation hole, and the inner wall of the second protection casing is provided with a second noise reduction layer.

In an alternative embodiment, the inner walls of the two first clamping grooves 20 and the two third clamping grooves 26 are provided with first elastic pads, so as to prevent the upper clamping portion 21 and the lower clamping portion 19 from damaging a workpiece with a square cross section.

In an alternative embodiment, the inner walls of the two sets of second clamping grooves 18 and the two sets of fourth clamping grooves 25 are provided with second elastic pads to prevent the upper clamping portion 21 and the lower clamping portion 19 from damaging a workpiece with a circular cross section.

In an alternative embodiment, the use method of the clamping device for the numerical control machine tool machining comprises the following specific steps:

s1, moving the workpiece to be machined to the position right above the rotating disc 9 after being clamped by the manipulator, and starting the first driving device 5 to adjust the positions of the two groups of lower clamping parts 19 so that the two groups of lower clamping parts 19 are positioned at two sides of the projection of the workpiece to be machined on the rotating disc 9;

s2, the moving assembly drives the two groups of first mounting plates 13 to move close to each other, and meanwhile, the multiple groups of first telescopic devices 22 operate to push the four groups of lower clamping parts 19 to move close to each other; the mechanical arm drives the workpiece to be processed to move towards the rotating disc 9 until two ends of the workpiece to be processed are respectively accommodated in the first clamping space or the placing space in a matched manner;

s3, the multiple groups of second telescopic devices 23 operate to push the four groups of upper clamping parts 21 to move close to each other until the four groups of upper clamping parts 21 are respectively positioned right above the four groups of lower clamping parts 19; the operation of the plurality of sets of lifting devices 16 drives the two sets of second mounting plates 24 to move towards the two sets of first mounting plates 13 until the inner walls of the second clamping spaces or the inner walls of the pressing spaces press the workpiece to be processed.

The clamping device can clamp and fix a workpiece with a square or circular cross section, can automatically position the workpiece when the workpiece is fixedly clamped, can simultaneously clamp the workpiece with the square or circular cross section, does not need to replace parts on the device, is more convenient, greatly saves the time for replacing equipment parts, and improves the processing and production efficiency of the workpiece.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. The clamping device for machining of the numerical control machine tool is characterized by comprising a base (1), a plurality of groups of supporting columns (2), a plurality of groups of assembling plates (3), a first driving device (5), a rotating shaft (7), a rotating disc (9), a first mounting plate (13), a plurality of groups of connecting rods (14), two groups of top plates (15) and a second mounting plate (24);

one end of each group of support columns (2) is connected with the base (1), and the other end of each group of support columns (2) is connected with the corresponding group of assembling plates (3); one end of the rotating shaft (7) is rotatably connected with the base (1), and the rotating shaft (7) is in transmission connection with the first driving device (5); the first driving device (5) is connected with the base (1); the other end of the rotating shaft (7) is connected with a rotating disc (9); the rotating disc (9) is provided with moving components for driving the two groups of first mounting plates (13) to mutually move away from or approach to each other along the diameter direction of the rotating disc (9); the two groups of first mounting plates (13) are distributed side by side;

two groups of lower clamping parts (19) are arranged on the end surface of each group of first mounting plates (13) side by side; the two groups of lower clamping parts (19) are both connected with the first mounting plate (13) in a sliding manner, and the mutually close end surfaces of the two groups of lower clamping parts (19) are both provided with a first clamping groove (20); each group of first clamping grooves (20) is provided with an opening on the side end face of the right-angle corner of each group of lower clamping parts (19) for forming a first clamping space which is matched and coated on the right-angle corner of the workpiece to be processed, and the bottom face of each group of first clamping grooves (20) is provided with a second clamping groove (18); the inner wall of the second clamping groove (18) is a curved surface; under the state that the two groups of lower clamping parts (19) are close to each other, the two groups of second clamping grooves (18) form a placing space for placing a cylindrical workpiece; wherein, two groups of first telescopic devices (22) for driving the two groups of lower clamping parts (19) to mutually approach or separate are arranged on the first mounting plate (13);

the multiple groups of connecting rods (14) are respectively connected with the two groups of first mounting plates (13) and the two groups of top plates (15); the two groups of top plates (15) and the two groups of first mounting plates (13) are in one-to-one correspondence and are parallel to each other, and a plurality of groups of lifting devices (16) used for driving the two groups of second mounting plates (24) to move towards or away from the two groups of first mounting plates (13) are respectively arranged on the end surfaces of the two groups of top plates (15) facing the two groups of first mounting plates (13);

two groups of upper clamping parts (21) are arranged on the end surface of each group of second mounting plates (24) facing the first mounting plate (13) side by side; the two groups of upper clamping parts (21) are both connected with a second mounting plate (24) in a sliding way, and the end surfaces of the two groups of upper clamping parts (21) which are close to each other are both provided with a third clamping groove (26); each group of third clamping grooves (26) is provided with an opening on the side end face of the right-angle corner of each group of upper clamping parts (21) for forming a second clamping space which is matched and coated on the right-angle corner of the workpiece to be processed, and the bottom face of each group of third clamping grooves (26) is provided with a fourth clamping groove (25); the inner wall of the fourth clamping groove (25) is a curved surface; under the condition that the two groups of upper clamping parts (21) are close to each other, the two groups of fourth clamping grooves (25) form a pressing space for pressing the cylindrical workpiece; wherein, the second mounting plate (24) is provided with two groups of second telescopic devices (23) which are used for driving the two groups of upper clamping parts (21) to mutually approach or separate.

2. The clamping device for the numerical control machine tool machining is characterized in that two groups of second mounting plates (24) are respectively connected with a plurality of groups of connecting rods (14) in a sliding mode.

3. The clamping device for numerical control machine tool machining according to claim 1 is characterized in that each set of assembling plates (3) is provided with a plurality of sets of assembling holes (4).

4. The clamping device for numerical control machine tool machining according to claim 1, characterized in that the first driving device (5) is covered with a first protective cover (6); base (1) is connected in first protection casing (6), is equipped with first louvre on first protection casing (6), is equipped with the first layer of making an uproar of falling on the inner wall of first protection casing (6).

5. The clamping device for numerical control machine tool machining according to claim 1, characterized by further comprising a plurality of sets of support rods (8) and a plurality of sets of sliders; wherein, the end surface of the rotating disc (9) facing the base (1) is provided with an annular chute;

the multiple groups of support rods (8) are uniformly distributed in a circumferential manner by taking the central axis of the rotating shaft (7) as the center, one ends of the multiple groups of support rods (8) are connected with the base (1), and the other ends of the multiple groups of support rods (8) are respectively connected with the multiple groups of sliding blocks; the multiple groups of sliding blocks are all connected with the sliding grooves in a sliding mode.

6. The clamping device for numerical control machine tool machining according to claim 1 is characterized in that the moving assembly comprises a second driving device (10), two sets of fixed plates (11), a threaded rod (12) and two sets of sliding plates (17);

two ends of the threaded rod (12) are respectively and rotatably connected with two groups of fixing plates (11); the two groups of fixed plates (11) are connected with the rotating disc (9); the central axis direction of the threaded rod (12) is overlapped with the diameter direction of the rotating disc (9), and one end of the threaded rod (12) penetrates through one group of fixing plates (11) and is in transmission connection with a second driving device (10); the second driving device (10) is connected with the fixing plate (11); the threaded rod (12) positioned between the two groups of fixing plates (11) is respectively provided with reverse external threads towards the two ends of the rotating disk (9) in the direction of the central axis of the rotating disk;

two sets of sliding plates (17) are connected two sets of first mounting panels (13) respectively, and two sets of sliding plates (17) all sliding connection rotary disk (9), and two sets of sliding plates (17) are the reverse external screw thread on screw rod (12) of screw-thread fit connection respectively.

7. The clamping device for numerical control machine tool machining according to claim 6 is characterized in that a second protective cover is covered on the outer side of the second driving device (10); the second protection casing is connected with a fixing plate (11), a second heat dissipation hole is formed in the second protection casing, and a second noise reduction layer is arranged on the inner wall of the second protection casing.

8. The clamping device for the numerical control machine tool machining is characterized in that first elastic cushions are arranged on the inner walls of the two groups of first clamping grooves (20) and the two groups of third clamping grooves (26).

9. The clamping device for the numerical control machine tool machining is characterized in that the inner walls of the two groups of second clamping grooves (18) and the two groups of fourth clamping grooves (25) are provided with second elastic pads.

10. The clamping device for the numerical control machine tool machining according to claim 1, characterized in that the use method of the clamping device for the numerical control machine tool machining comprises the following specific steps:

s1, moving the workpiece to be machined to the position right above the rotating disc (9) after being clamped by the manipulator, and starting the first driving device (5) to adjust the positions of the two groups of lower clamping parts (19) so that the two groups of lower clamping parts (19) are positioned on two sides of the projection of the workpiece to be machined on the rotating disc (9);

s2, the moving assembly drives the two groups of first mounting plates (13) to move close to each other, and meanwhile, the multiple groups of first telescopic devices (22) operate to push the four groups of lower clamping parts (19) to move close to each other; the mechanical arm drives the workpiece to be processed to move towards the rotating disc (9) until two ends of the workpiece to be processed are respectively accommodated in the first clamping space or the placing space in a matching manner;

s3, the multiple groups of second telescopic devices (23) operate to push the four groups of upper clamping parts (21) to move close to each other until the four groups of upper clamping parts (21) are respectively positioned right above the four groups of lower clamping parts (19); the operation of the plurality of groups of lifting devices (16) drives the two groups of second mounting plates (24) to move towards the two groups of first mounting plates (13) until the inner walls of the second clamping spaces or the inner walls of the pressing spaces press the workpieces to be processed.