CN116394031A

CN116394031A - CNC machining center clamping device

Info

Publication number: CN116394031A
Application number: CN202310412811.1A
Authority: CN
Inventors: 袁用桂
Original assignee: Shenzhen Weibotong Technology Co ltd
Current assignee: Shenzhen Weibotong Technology Co ltd
Priority date: 2023-04-10
Filing date: 2023-04-10
Publication date: 2023-07-07

Abstract

The application relates to CNC processing technology field discloses a CNC machining center clamping device, and it includes: a base; the processing table is arranged on the base and is used for placing a workpiece to be processed; the turnover pieces are vertically and slidably arranged on the base, and the two turnover pieces are used for mutually matching to clamp and turn over the workpiece; the overturning piece comprises a clamping cylinder and a rotating cylinder, the axes of the clamping cylinder and the rotating cylinder are coaxially arranged in the horizontal direction, the rotating cylinder is fixedly connected to the output end of the clamping cylinder, an abutting plate is fixedly arranged at the output end of the rotating cylinder, and the abutting plates of the two overturning pieces are used for simultaneously abutting and clamping a workpiece. According to the turnover clamping device, the product can be automatically turned over and clamped to be processed in multiple faces, and the efficiency is remarkably improved.

Description

CNC machining center clamping device

Technical Field

The application relates to the technical field of CNC processing, in particular to a CNC processing center clamping device.

Background

The CNC numerical control machining center is a high-efficiency automatic machine tool which consists of mechanical equipment and a numerical control system and is suitable for machining complex parts, and is one of the numerical control machine tools with highest yield and most extensive application in the world. The device has strong comprehensive processing capability, can finish more processing contents after one-time clamping of workpieces, has higher processing precision, is suitable for batch workpieces with medium processing difficulty, has the efficiency which is 5-10 times that of common equipment, can finish processing which cannot be finished by a plurality of common equipment, and is more suitable for single-piece processing or small-medium batch production with complex shape and high precision requirement.

CNC machining center concentrates milling, boring, drilling, tapping and cutting functions on one piece of equipment, so that the CNC machining center has various machining procedure and technological means. When a workpiece is processed in a processing center, the workpiece needs to be clamped on a processing platform, and then the multi-axis linkage processing center adjusts the angle of the workpiece and processes each surface.

The existing multi-axis machining center can machine the top and a plurality of surfaces of a workpiece in the circumferential direction, however, when the end face of the workpiece, which is in contact with a machining platform, is required to be machined, the equipment is required to be disassembled manually after being stopped, and the efficiency is low.

Disclosure of Invention

In order to solve the problem of lower efficiency of manually disassembling and overturning the workpiece and clamping again in the prior art,

the application provides a CNC machining center clamping device adopts following scheme:

a CNC machining center clamping device, comprising:

a base;

the processing table is arranged on the base and is used for placing a workpiece to be processed;

the turnover pieces are vertically and slidably arranged on the base, and the two turnover pieces are used for being matched with each other to clamp and turn over the workpiece;

the turnover piece comprises a clamping cylinder and a rotating cylinder, the axes of the clamping cylinder and the rotating cylinder are coaxially arranged in the horizontal direction, the rotating cylinder is fixedly connected to the output end of the clamping cylinder, an abutting plate is fixedly arranged at the output end of the rotating cylinder, and the two abutting plates of the turnover piece are used for simultaneously abutting and clamping a workpiece.

Through adopting above-mentioned scheme, respectively be provided with a upset piece in processing platform both sides, two upset pieces can cooperate and centre gripping and upset work piece. In traditional CNC machining center, although can process a plurality of surfaces on the top and the circumference of the work piece on the processing platform, when the terminal surface that needs to contact work piece and processing platform is processed, still need to dismantle the work piece and overturn clamping once more with the equipment manual work after shutting down, efficiency is lower. In this technical scheme, centre gripping cylinder work makes two butt boards butt respectively on the work piece relative both ends in order to realize the centre gripping, and the upset piece wholly rises and provides the rotation space, and rotatory cylinder work is put to the processing bench after overturning the work piece to the realization is to the automatic upset processing of product, is showing and is promoting efficiency.

Optionally, be provided with flexible buffer layer on the butt plate, flexible buffer layer is located the butt plate is last to be kept away from the one end of revolving cylinder, flexible buffer layer is used for supporting tight work piece.

Through adopting above-mentioned scheme, be provided with flexible buffer layer for butt plate and work piece butt effect when tight centre gripping is supported to the butt. In some technical schemes, because the workpiece is a special-shaped workpiece, the abutting effect is poor, and the workpiece can fall off when the workpiece is clamped and overturned; if the clamping force is too great, damage to the workpiece or the abutment plate can result. According to the technical scheme, the flexible buffer layer is arranged on the abutting plate, so that the flexible buffer layer is in contact with a workpiece, on one hand, the abutting effect of the abutting plate and the workpiece can be guaranteed, the friction force is improved, and the clamping stability is guaranteed; on the other hand, the flexible buffer layer can play a role in buffering, so that damage caused by overlarge clamping force is prevented.

Optionally, the device further comprises a plurality of positioning push rods which encircle the side edges of the processing table, wherein the axes of the positioning push rods are converged in the center of the processing table, the positioning push rods work and stretch out and draw back along the axis direction of the positioning push rods, and the positioning push rods are used for tightly propping and limiting the workpiece.

Through adopting above-mentioned scheme, be provided with a plurality of location push rods, a plurality of location push rods can stretch out and support tightly spacing to the work piece. In some technical schemes, when the special-shaped workpiece is positioned and clamped on the processing table, the positioning piece is abutted against the workpiece to realize the abutting and limiting of the product, and the positioning piece is generally of a planar plate-shaped structure, so that the contact area between the positioning piece and the special-shaped workpiece is small, the problem of poor clamping and limiting effects is easily generated, and micro-motion is easily generated in the process of processing the workpiece to influence the processing precision. In this application technical scheme, a plurality of positioning push rods are stretched out by the circumference of processing platform and to the middle part to can carry out effectual support to the work piece of shape diverse and tightly, have better suitability and spacing effect.

Optionally, the vacuum generator is further arranged, an air flow chamber is formed in the processing table, a plurality of air inlets communicated with the air flow chamber are formed in the top surface of the processing table in a penetrating mode, the vacuum generator is communicated with the air flow chamber, and the vacuum generator works to exhaust air to the air flow chamber.

Through adopting above-mentioned scheme, offer by a plurality of inlet ports on the platform, further promote the clamping stability to the work piece through absorbing mode. In traditional technical scheme, place the product behind the processing platform generally, the mode of simple through pressing from both sides tightly realizes spacing to the product, and clamping stability is limited. According to the vacuum adsorption device, the workpiece is adsorbed in a matched mode through vacuum adsorption, so that the stability of the workpiece on the processing table is guaranteed, and the processing precision of the workpiece is further improved.

Optionally, the air inlets are divided into a plurality of groups, and each group of air inlets corresponds to one positioning push rod; each group of air inlets are uniformly distributed on the axis direction of the corresponding positioning push rod, and the positioning push rod stretches out to seal the corresponding air inlet.

Through adopting above-mentioned scheme for the location push rod is when supporting tight work piece, and cooperation work piece is whole to be sealed the inlet port, so that form the vacuum in the air current cavity, thereby guarantee the vacuum adsorption effect to the work piece. In some schemes, in order to adapt to the adsorption of various different workpieces, adsorption holes are generally densely distributed on an adsorption surface, an electric control valve is correspondingly arranged below each adsorption hole, and after the workpiece is placed on the adsorption surface, other adsorption holes except the adsorption holes below the workpiece are required to be completely closed, so that the formation of a vacuum adsorption cavity is ensured; however, the above technical solution requires that a valve capable of being controlled independently is provided at each adsorption hole, which is costly and complicated to operate. In this technical scheme, a plurality of location push rods are limited by the work piece shape at processing platform middle part and stretch out the distance difference, therefore the confined inlet port quantity of every location push rod is different to when making location push rod support tight spacing to the work piece, can be homeopathic with other inlet ports except for the inlet port of work piece below totally seal, so that the air current cavity forms the vacuum, guarantee vacuum adsorption effect, this application technical scheme has significantly simplified the operation flow and has practiced thrift the cost.

Optionally, the airflow chamber is provided with an air outlet hole communicated with the vacuum generator, a filter screen is installed at the air outlet hole in a covering mode, and the diameter of a mesh hole of the filter screen is smaller than the aperture of the air inlet hole.

Through adopting above-mentioned scheme, be provided with the filter screen in venthole department, and the mesh diameter of filter screen is less than the inlet port diameter. In actual working conditions, a large amount of scraps are generated in the workpiece processing process, and although the positioning push rod can be matched with the workpiece to seal all air inlets after limiting the workpiece, for special-shaped workpieces with special shapes, when the positioning push rod is abutted against the workpiece, partial areas with individual air inlets can be just left unsealed, so that a small amount of scraps enter the airflow chamber. In this application technical scheme, be provided with the filter screen in venthole department, can prevent that the piece from being inhaled vacuum generator, played the protection effect of preferred.

Optionally, the device further comprises two threaded rods and a transmission belt, wherein the threaded rods are rotatably arranged on the base, and the two threaded rods are in transmission connection through the transmission belt to synchronously rotate; and each threaded rod is connected with a nut seat in a threaded manner, and the turnover pieces are fixedly arranged on the nut seats in a one-to-one correspondence manner.

Through adopting above-mentioned scheme, make two threaded rods synchronous rotation through driving belt, ensure the uniformity that two upset pieces go up and down. In some technical schemes, the lifting driving structures of the two turnover pieces are independent of each other, and the two turnover pieces are required to be controlled to synchronously up and down through a program, so that the lifting driving structure is more complex. In this application technical scheme, driving belt can guarantee that upset piece goes up and down in step and is located same horizontal plane all the time to guarantee the centre gripping effect.

Optionally, fixed mounting has the stand on the base, vertical parallel arrangement has first synchronous camera and second synchronous camera on the stand, first synchronous camera is located one side of processing platform, second synchronous camera is located one side of threaded rod high-order end, first synchronous camera with whether produce the collision when the second synchronous camera is used for detecting the work piece upset.

By adopting the scheme, a first synchronous camera and a second synchronous camera are arranged; in actual working condition, this clamping device fixed mounting is in CNC machining center's casing inside, and the upset piece promotes the work piece centre gripping back, with the in-process of work piece upset, the work piece probably collides with machining center's top casing or processing platform. The position of work piece can be detected effectively through the setting of first synchronous camera and second synchronous camera to prevent that the work piece from producing collision damage at the upset in-process.

Optionally, an infrared sensor is disposed on the abutting plate, the infrared sensor faces to the workpiece above the processing table, and the infrared sensor is used for judging whether the workpiece contacts with the abutting plate.

Through adopting above-mentioned scheme, be provided with infrared sensor to infrared sensor detects the distance between work piece and the butt joint board, when guaranteeing that butt joint board and work piece are effective to support tightly, avoids clamping force too big and leads to butt joint board damage or work piece impaired.

Optionally, the device further comprises a rotating cylinder fixedly installed in the middle of the base, an output shaft of the rotating cylinder is vertically arranged and fixedly connected to the bottom of the processing table, and the rotating cylinder works to drive the processing table to rotate.

Through adopting above-mentioned scheme, rotate the cylinder and can make the processing platform rotate around vertical axis to adjust the work piece angle on the processing platform, so that process a plurality of faces of work piece.

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

1. two sides of the processing table are respectively provided with a turnover piece, and the two turnover pieces can be matched to clamp and turn over the workpiece. In traditional CNC machining center, although can process a plurality of surfaces on the top and the circumference of the work piece on the processing platform, when the terminal surface that needs to contact work piece and processing platform is processed, still need to dismantle the work piece and overturn clamping once more with the equipment manual work after shutting down, efficiency is lower. According to the technical scheme, the clamping cylinder works so that the two abutting plates are respectively abutted against the two opposite ends of the workpiece to realize clamping, the turnover piece integrally ascends to provide a rotation space, and the rotary cylinder works to turn over the workpiece and then put the workpiece on the processing table, so that automatic turning over processing of products is realized, and the efficiency is remarkably improved;

2. a plurality of positioning push rods are arranged and can extend out to tightly prop against and limit a workpiece. In some technical schemes, when the special-shaped workpiece is positioned and clamped on the processing table, the positioning piece is abutted against the workpiece to realize the abutting and limiting of the product, and the positioning piece is generally of a planar plate-shaped structure, so that the contact area between the positioning piece and the special-shaped workpiece is small, the problem of poor clamping and limiting effects is easily generated, and micro-motion is easily generated in the process of processing the workpiece to influence the processing precision. According to the technical scheme, the plurality of positioning push rods extend out from the circumferential direction of the processing table to the middle part, so that workpieces with different shapes can be effectively abutted, and the positioning push rods have good adaptability and a limiting effect;

3. the positioning push rod is abutted against the workpiece, and the air inlet holes are fully closed by matching with the workpiece, so that vacuum is formed in the airflow cavity, and the vacuum adsorption effect on the workpiece is ensured. In some schemes, in order to adapt to the adsorption of various different workpieces, adsorption holes are generally densely distributed on an adsorption surface, an electric control valve is correspondingly arranged below each adsorption hole, and after the workpiece is placed on the adsorption surface, other adsorption holes except the adsorption holes below the workpiece are required to be completely closed, so that the formation of a vacuum adsorption cavity is ensured; however, the above technical solution requires that a valve capable of being controlled independently is provided at each adsorption hole, which is costly and complicated to operate. In this technical scheme, a plurality of location push rods are limited by the work piece shape at processing platform middle part and stretch out the distance difference, therefore the confined inlet port quantity of every location push rod is different to when making location push rod support tight spacing to the work piece, can be homeopathic with other inlet ports except for the inlet port of work piece below totally seal, so that the air current cavity forms the vacuum, guarantee vacuum adsorption effect, this application technical scheme has significantly simplified the operation flow and has practiced thrift the cost.

Drawings

FIG. 1 is a schematic view of the overall structure of an embodiment of the present application;

FIG. 2 is an exploded view of the overall structure of an embodiment of the present application;

fig. 3 is a schematic view of another overall structure according to an embodiment of the present application.

Reference numerals illustrate:

1. a base; 11. a rotary cylinder; 12. a vertical rod;

2. a processing table; 21. an annular guide rail; 22. a vacuum generator; 23. an airflow chamber; 24. an air inlet hole; 25. an air outlet hole; 26. a filter screen; 27. positioning a push rod; 28. a sealing gasket;

3. a turnover piece; 31. a clamping cylinder; 32. a rotary cylinder; 33. an abutting plate; 331. a flexible buffer layer; 34. an infrared sensor;

4. a threaded rod; 41. a drive belt; 42. a driving motor; 43. a limiting block; 44. a nut seat;

5. a vertical seat; 51. a first synchronization camera; 52. and a second synchronous camera.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

The present application is described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses CNC machining center clamping device.

Referring to fig. 1 and 2, a CNC machining center clamping device includes: base 1, processing platform 2 and upset piece 3, processing platform 2 install on base 1, and the quantity of upset piece 3 is two and all vertical slip installs on base 1, and two upset pieces 3 are located the both sides of processing platform 2 respectively, and two upset pieces 3 mutually support and centre gripping and upset work piece. The turnover pieces 3 comprise clamping cylinders 31 and rotating cylinders 32, the axes of the clamping cylinders 31 and the rotating cylinders 32 are coaxially arranged in the horizontal direction, the rotating cylinders 32 are fixedly connected to the output ends of the clamping cylinders 31, abutting plates 33 are fixedly arranged at the output ends of the rotating cylinders 32, the abutting plates 33 of the two turnover pieces 3 respectively abut against two opposite ends of a workpiece to clamp the workpiece, and the rotating cylinders 32 work to turn the workpiece.

Referring to fig. 1 and 2, two threaded rods 4 and a driving belt 41 for driving and connecting the two threaded rods 4 are disposed on the base 1, an installation cavity is formed in the base 1, a driving motor 42 is disposed in the installation cavity, an output shaft of the driving motor 42 is connected with the threaded rods 4, and the driving motor 42 works to enable the two threaded rods 4 to rotate synchronously. The high-order end of every threaded rod 4 is provided with a stopper 43, threaded rod 4 is last threaded connection has nut seat 44, and upset piece 3 one-to-one's fixed mounting is on nut seat 44 to make driving motor 42 work can drive upset piece 3 and go up and down in step. It should be noted that the two overturning pieces 3 are always positioned on the same horizontal plane, so as to tightly clamp the workpiece. Specifically, the clamping cylinder 31 is fixedly mounted on the nut seat 44, and the rotary cylinder 32 is fixedly mounted on the output shaft of the clamping cylinder 31; be provided with flexible buffer layer 331 on the butt plate 33, flexible buffer layer 331 is located the butt plate 33 and keeps away from the one end of revolving cylinder 32, and this flexible buffer layer 331 is used for supporting tight spacing work piece, and in this embodiment, flexible buffer layer 331 is the silica gel material.

Referring to fig. 1 and 2, an infrared sensor 34 is provided on the abutment plate 33, the infrared sensor 34 is fixedly mounted on one end of the abutment plate 33 near the rotary cylinder 32, and the infrared sensor 34 faces directly above the processing table 2 to detect whether the workpiece is in contact with the flexible buffer layer 331 of the abutment plate 33. In actual working conditions, the infrared sensor 34 is electrically connected with a single-chip microcomputer (not shown in the figure), after the infrared sensor 34 detects that a product abuts against the flexible buffer layer 331 of the abutting plate 33, a position signal is sent to the single-chip microcomputer, and the single-chip microcomputer receives the position signal and controls the clamping cylinder 31 to stop working, so that the workpiece is prevented from being damaged or the overturning piece 3 is prevented from being damaged due to overlarge clamping force.

Referring to fig. 1 and 2, a stand 5 is fixedly installed on a base 1, a first synchronous camera 51 and a second synchronous camera 52 are vertically arranged on the stand 5 in parallel, the first synchronous camera 51 is located on one side of a processing table 2, the second synchronous camera 52 is located on one side of a high-end limiting block 43 of a threaded rod 4, and the first synchronous camera 51 and the second synchronous camera 52 are used for detecting whether collision occurs when a workpiece is overturned. It should be noted that the first synchronization camera 51 and the second synchronization camera 52 are electrically connected with the single chip microcomputer, the first synchronization camera 51 sends a first electrical signal to the single chip microcomputer when detecting that the product collides with the processing table 2, the second synchronization camera 52 sends a second electrical signal to the single chip microcomputer when detecting that the product collides with the shell of the CNC processing center, and the single chip microcomputer controls the equipment to stop and send an alarm after receiving the first electrical signal or/and the second electrical signal.

Referring to fig. 1 and 2, the rotary machine further comprises a rotary cylinder 11 fixedly installed in the middle of the base 1, an output shaft of the rotary cylinder 11 is vertically arranged and fixedly connected to the bottom of the machining table 2, and the rotary cylinder 11 works to drive the machining table 2 to rotate. It should be noted that the bottom of the processing table 2 is provided with an annular guide rail 21, the base 1 is fixedly provided with two upright rods 12, and the high-position ends of the upright rods 12 can be slidably abutted in the annular guide rail to support the processing table 2.

Referring to fig. 1 and 2, a vacuum generator 22 is fixedly installed at the bottom of a processing table 2, an airflow chamber 23 is formed in the processing table 2, a plurality of air inlets 24 communicated with the airflow chamber 23 are formed in the top surface of the processing table 2 in a penetrating manner, and an air outlet 25 communicated with the vacuum generator 22 is formed in the bottom surface of the processing table 2 in a penetrating manner; the air inlet end of the vacuum generator 22 is connected to the air outlet hole 25 so that the vacuum generator 22 communicates with the air flow chamber 23, and the vacuum generator 22 operates to suck air from the air flow chamber 23. It should be noted that, a filter screen 26 covering the air outlet hole 25 is disposed in the air flow chamber 23, and the diameter of the mesh of the filter screen 26 is smaller than the diameter of the air inlet hole 24.

Referring to fig. 1 and 2, a plurality of positioning push rods 27 are circumferentially arranged on the side edges of the processing table 2, the axes of the positioning push rods 27 are converged at the center of the processing table 2, the positioning push rods 27 work and stretch along the axial direction of the positioning push rods 27, and the positioning push rods 27 are used for tightly limiting a workpiece. Specifically, a plurality of linear motors are fixed to the side edges of the processing table 2, and the positioning push rod 27 is slidably connected to the linear motors. In this embodiment, the top surface of the processing table 2 is a circular structure, and the axis of the positioning push rod 27 is arranged along the radial direction of the top surface of the processing table 2.

Referring to fig. 2 and 3, the air intake holes 24 are divided into a plurality of groups, and each group of air intake holes 24 corresponds to one positioning push rod 27; each group of air inlets 24 is uniformly distributed on the axial direction of the corresponding positioning push rod 27, and the positioning push rods 27 extend to seal the corresponding air inlets 24 one by one. Specifically, the number of air inlets 24 in each group is 4, and the positioning push rod 27 has a starting state of sliding to be far away from the center of the processing table 2 and a closing state of sliding to completely close the air inlets 24; the sealing gasket 28 is fixedly arranged on the bottom surface of the positioning push rod 27, the sealing gasket 28 is attached to the top surface of the processing table 2, and when the positioning push rod 27 stretches out, the sealing gasket 28 can achieve the good effect of sealing the air inlet hole 24.

The implementation principle of the CNC machining center clamping device is as follows: the clamping cylinder 31 works so that two abutting plates 33 respectively abut against opposite ends of a workpiece to realize clamping, the turnover piece 3 integrally ascends to provide a rotation space, and the rotating cylinder 32 works to turn over the workpiece and then put the workpiece on the processing table 2, so that automatic turnover processing of products is realized. The positioning push rods 27 extend out to tightly position the workpiece on the processing table 2, and meanwhile, the positioning push rods 27 seal the air inlet holes 24, so that the vacuum generator 22 can absorb the workpiece on the processing table 2 in a vacuum manner, and the workpiece installation stability is improved.

The embodiments of this embodiment are all preferred embodiments of the present application, and are not intended to limit the scope of the present application, in which like parts are denoted by like reference numerals. Therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. CNC machining center clamping device, characterized in that includes:

a base (1);

the processing table (2) is arranged on the base (1) and is used for placing a workpiece to be processed;

the turnover pieces (3) are vertically and slidably arranged on the base (1), and the two turnover pieces (3) are used for mutually matching to clamp and turn over a workpiece;

the turnover piece (3) comprises clamping cylinders (31) and rotating cylinders (32) with axes coaxially arranged in the horizontal direction, the rotating cylinders (32) are fixedly connected to the output ends of the clamping cylinders (31), abutting plates (33) are fixedly arranged at the output ends of the rotating cylinders (32), and the abutting plates (33) of the two turnover pieces (3) are used for simultaneously abutting and clamping workpieces.

2. The CNC machining center clamping device according to claim 1, wherein a flexible buffer layer (331) is provided on the abutment plate (33), the flexible buffer layer (331) is located at an end of the abutment plate (33) away from the rotary cylinder (32), and the flexible buffer layer (331) is used for abutting against a workpiece.

3. The clamping device of a CNC machining center according to claim 1, further comprising a plurality of positioning push rods (27) arranged around the side edges of the machining table (2), wherein the axes of the positioning push rods (27) converge at the center of the machining table (2), the positioning push rods (27) work to stretch and retract along the axis direction of the positioning push rods (27), and the positioning push rods (27) are used for limiting the workpiece in a propping manner.

4. A CNC machining center clamping device according to claim 3, further comprising a vacuum generator (22), wherein an air flow chamber (23) is provided in the machining table (2), a plurality of air inlet holes (24) communicated with the air flow chamber (23) are provided in the top surface of the machining table (2), the vacuum generator (22) is communicated with the air flow chamber (23), and the vacuum generator (22) is operative to suck air into the air flow chamber (23).

5. The CNC machining center clamping device according to claim 4, wherein the air intake holes (24) are equally divided into a plurality of groups, each group of the air intake holes (24) corresponding to one of the positioning push rods (27); each group of air inlets (24) is uniformly distributed on the axial direction of the corresponding positioning push rod (27), and the positioning push rod (27) stretches out to seal the corresponding air inlets (24).

6. The CNC machining center clamping device according to claim 4, wherein the air flow chamber (23) has an air outlet hole (25) communicated with the vacuum generator (22), a filter screen (26) is installed at the air outlet hole (25) in a covering manner, and the mesh diameter of the filter screen (26) is smaller than the aperture of the air inlet hole (24).

7. The CNC machining center clamping device according to claim 1, further comprising two threaded rods (4) and a transmission belt (41), wherein the threaded rods (4) are rotatably mounted on the base (1), and the two threaded rods (4) are synchronously rotated by transmission connection of the transmission belt (41); and each threaded rod (4) is in threaded connection with a nut seat (44), and the turnover pieces (3) are fixedly arranged on the nut seats (44) in a one-to-one correspondence manner.

8. The clamping device of a CNC machining center according to claim 7, wherein a vertical seat (5) is fixedly installed on the base (1), a first synchronous camera (51) and a second synchronous camera (52) are vertically arranged on the vertical seat (5) in parallel, the first synchronous camera (51) is located on one side of the machining table (2), the second synchronous camera (52) is located on one side of the high-position end of the threaded rod (4), and the first synchronous camera (51) and the second synchronous camera (52) are used for detecting whether collision occurs when a workpiece turns over.

9. The CNC machining center clamping device according to claim 2, wherein an infrared sensor (34) is provided on the abutment plate (33), the infrared sensor (34) faces the workpiece above the machining table (2), and the infrared sensor (34) is used for judging whether the workpiece is in contact with the abutment plate (33).

10. The CNC machining center clamping device according to claim 1, further comprising a rotating cylinder (11) fixedly installed in the middle of the base (1), wherein an output shaft of the rotating cylinder (11) is vertically arranged and fixedly connected to the bottom of the machining table (2), and the rotating cylinder (11) is operated to drive the machining table (2) to rotate.