CN110977545A

CN110977545A - Clamping jig for CNC (computer numerical control) machining

Info

Publication number: CN110977545A
Application number: CN201911408409.6A
Authority: CN
Inventors: 詹淳崵; 赵长亮; 蒋燕; 周士升
Original assignee: Suzhou Fengchuan Electronic Technology Co ltd
Current assignee: Suzhou Fengchuan Electronic Technology Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-04-10

Abstract

The invention discloses a clamping jig for CNC (computer numerical control) machining, which comprises a base plate, a support plate and a cover plate, wherein the support plate is fixedly arranged on the upper surface of the base plate, the upper surface of the support plate is in contact connection with the lower surface of a workpiece to be machined, the cover plate is arranged above the workpiece, the lower surface of the cover plate is in press connection with the workpiece, a plurality of pressure head mechanisms are arranged at the peripheral edge of the base plate and in press connection with the top surface of the cover plate, the upper end of a push-pull rod is connected with a fixed block, a strip-shaped through hole is formed in the fixed block, a third rotating shaft is embedded into the strip-shaped through hole, two ends of the third rotating shaft respectively extend out of the strip-shaped through hole, and first strip-shaped parts. The clamping device can clamp the cover plate at a distance stably and under constant pressure, so that the size of the cover plate is reduced, more space is provided for processing a workpiece, the workpiece can be processed in multiple processes at one time, and the processing effect and efficiency of the workpiece are improved.

Description

Clamping jig for CNC (computer numerical control) machining

Technical Field

The invention relates to a clamping jig for CNC machining, and belongs to the field of machining.

Background

A Computer Numerical Control (CNC) machine is an automatic machine equipped with a program control system, which can logically process a program specified by a control code or other symbolic instructions and decode the program so as to make the machine operate and machine parts, so that compared with the traditional manufacturing industry, the CNC machine has higher machining precision and automation degree, saves a large number of manual operation links, improves the productivity, and is widely applied to the modernization process of the manufacturing industry.

The tool clamp is a component for assisting production and processing, which is very common in the industrial manufacturing industry, and is used for fixing a workpiece to be processed so as to facilitate the transportation of the workpiece or a related processing technology; in particular, when performing CNC machining (CNC, computer numerical control machine, or numerically controlled machine tool for short), a workpiece to be machined is often clamped and fixed by a tool fixture.

Disclosure of Invention

The clamping jig for CNC machining can clamp a cover plate at a distance stably and under constant pressure, so that the size of the cover plate is reduced, more space is provided for machining a workpiece, a plurality of procedures can be conducted on the workpiece at one time, and the machining effect and efficiency of the workpiece are improved.

In order to achieve the purpose, the invention adopts the technical scheme that: a clamping jig for CNC machining comprises a base plate, a support plate and a cover plate, wherein the support plate is fixedly installed on the upper surface of the base plate, the upper surface of the support plate is in contact connection with the lower surface of a workpiece to be machined, the cover plate is arranged above the workpiece, the lower surface of the cover plate is in press fit connection with the workpiece, a plurality of pressure head mechanisms are installed at the peripheral edge of the base plate, and the pressure head mechanisms are in press fit connection with the top surface of the cover plate;

the pressure head mechanism further comprises a fixed plate, a fixed seat, a push-pull rod, a warping pressure plate, a pressure head and two connecting rotating plates symmetrically arranged on two sides of the fixed seat, one end of the fixed plate is arranged on the base plate, the other end, far away from the base plate, of the fixed plate is provided with a through hole for the push-pull rod to pass through, the upper end of the push-pull rod is rotatably connected with the connecting rotating plates, and the lower end of the push-pull rod passes through the fixed plate and is connected with a driving assembly;

the base part at the lower end of the fixed seat is fixedly arranged on the upper surface of the fixed plate, the base part is connected with a connecting part inclined towards one side of the push-pull rod, the lower end of the connecting part is provided with a first rotating shaft penetrating through the connecting part, the upper end of the connecting part is provided with a second rotating shaft penetrating through the connecting part, two ends of the first rotating shaft respectively extend out of two sides of the connecting part and are respectively connected with the connecting rotating plate, and the second rotating shaft is rotatably connected with the tail end of the warping pressing plate;

the connecting rotating plate comprises a first strip-shaped part and a second strip-shaped part, one end of each of the first strip-shaped part and the second strip-shaped part is connected, so that an acute angle is formed between the first strip-shaped part and the second strip-shaped part, a corner part is formed at the joint of the first strip-shaped part and the second strip-shaped part, and the corner parts of the two connecting rotating plates are respectively in rotating connection with two ends of the first rotating shaft;

one end, opposite to the corner portion, of each of the two first strip-shaped portions is rotatably connected with the upper end of the push-pull rod through a third rotating shaft, a fourth rotating shaft is connected between one ends, opposite to the corner portion, of the two second strip-shaped portions, the fourth rotating shaft is rotatably connected with the rear end of the pressing head, the rear end of the pressing head is provided with a downwards extending switching portion, the switching portion is rotatably connected with the middle rear portion of the warping pressing plate through a fifth rotating shaft, and the lower surface of the front end of the pressing head can be in compression contact with the upper surface of the warping pressing plate;

the upper end of the push-pull rod is connected with a fixed block, a strip-shaped through hole is formed in the fixed block, the third rotating shaft is embedded into the strip-shaped through hole, two ends of the third rotating shaft respectively extend out of the strip-shaped through hole, and the first strip-shaped parts of the two connecting rotating plates are respectively connected with two ends of the third rotating shaft in a rotating mode.

The further improved scheme in the technical scheme is as follows:

1. in the above scheme, the driving assembly is an air cylinder.

2. In the above scheme, spacing card is all installed at the both ends of first pivot, third pivot and fourth pivot, and this spacing card imbeds in the recess at first pivot, third pivot or fourth pivot both ends, and the inboard surface of this spacing card is connected with the outside surface contact who connects the rotor plate.

3. In the above scheme, the number of the pressure head mechanisms is 8, and two pressure head mechanisms are respectively arranged at four edges of the base plate in a group.

4. In the above scheme, handles are respectively installed on two opposite side surfaces of the cover plate.

5. In the above aspect, the handle is attached to a side surface of the short side of the cover plate.

6. In the above scheme, the cover plate is an iron cover plate or a plastic cover plate.

7. In the scheme, a bottom plate is arranged right below the base plate, and the bottom plate is connected with the cover plate through a plurality of supporting columns.

8. In the above scheme, the bottom plate and the cover plate are connected through 4 support columns, and the 4 support columns are respectively located at four corners of the bottom plate.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

the clamping jig for CNC machining is ingenious in structural design of a pressure head mechanism, double pressure is provided by the warped pressure plate and the pressure head through the linkage effect of a plurality of components, the force and the stability of the warped pressure plate for pressing the cover plate are enhanced, the situations of shaking, tool vibrating, tool lines and the like caused by insufficient clamping force during machining of a workpiece are avoided, and the stability and the quality of the workpiece machining are improved; the clamping force of the warping pressing plate can be increased under the condition that the driving force provided by the driving assembly is the same, and further, when the length of the warping pressing plate is long, second stress is provided in the middle of the warping pressing plate through the pressing head, so that the warping pressing plate can clamp a cover plate at a far distance with stable and constant pressure, more space is provided for processing a workpiece, multiple processes can be performed on the workpiece at one time, and the processing effect and efficiency of the workpiece are improved; in addition, through the cooperation setting of push rod pole and each structure for the biggest angle that the perk clamp plate can be opened is greater than 90, is convenient for to the clamping of work piece, and can not injure by the article of centre gripping, has further improved stability and the quality to work piece processing.

Drawings

FIG. 1 is a structural front view of a clamping jig for CNC machining according to the present invention;

FIG. 2 is a structural front view of a pressure head mechanism of the clamping jig for CNC machining;

FIG. 3 is a first structural diagram of a pressure head mechanism of the clamping jig for CNC machining;

FIG. 4 is a structural schematic diagram of a pressure head mechanism of the clamping jig for CNC machining according to the invention;

FIG. 5 is an enlarged view of a portion of the structure of FIG. 4;

FIG. 6 is a schematic structural view of a connecting rotating plate of the clamping jig for CNC machining according to the present invention;

FIG. 7 is a schematic view of a fixing seat structure of the clamping jig for CNC machining according to the present invention;

FIG. 8 is a schematic structural diagram of the clamping jig for CNC machining according to the present invention.

In the above drawings: 1. a substrate; 2. a carrier plate; 3. a workpiece; 5. a cover plate; 6. a pressure head mechanism; 601. a fixing plate; 602. a fixed seat; 6021. a base part; 6022. a connecting portion; 603. a push-pull rod; 604. warping and pressing the plate; 605. a pressure head; 6051. a switching part; 606. a through hole; 607. a drive assembly; 608. a first rotating shaft; 609. a second rotating shaft; 610. a third rotating shaft; 611. a fourth rotating shaft; 612. a fifth rotating shaft; 613. a fixed block; 6131. a strip-shaped through hole; 614. connecting the rotating plate; 6141. a first bar-shaped portion; 6142. a second bar-shaped portion; 6143. a corner portion; 7. a handle; 8. a base plate; 9. and (4) a support column.

Detailed Description

In the description of this patent, it is noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The meaning of the above terms in this patent may be specifically understood by those of ordinary skill in the art.

Example 1: a clamping jig for CNC machining comprises a base plate 1, a carrier plate 2 and a cover plate 5, wherein the carrier plate 2 is fixedly installed on the upper surface of the base plate 1, the upper surface of the carrier plate 2 is in contact connection with the lower surface of a workpiece 3 to be machined, the cover plate 5 is arranged above the workpiece 3, the workpiece 3 on the lower surface of the cover plate 5 is in press fit connection, a plurality of pressure head mechanisms 6 are installed at the peripheral edges of the base plate 1, and the pressure head mechanisms 6 are in press fit connection with the top surface of the cover plate 5;

the pressure head mechanism 6 further comprises a fixed plate 601, a fixed seat 602, a push-pull rod 603, a warping pressing plate 604, a pressure head 605 and two connecting rotating plates 614 symmetrically arranged on two sides of the fixed seat 602, wherein one end of the fixed plate 601 is mounted on the substrate 1, a through hole 606 for the push-pull rod 603 to pass through is formed in the other end, away from the substrate 1, of the fixed plate 601, the upper end of the push-pull rod 603 is rotatably connected with the connecting rotating plates 614, and the lower end of the push-pull rod 603 passes through the fixed plate 601 and is connected with a driving assembly 607;

a base part 6021 at the lower end of the fixed seat 602 is fixedly arranged on the upper surface of the fixed plate 601, a connecting part 6022 inclined towards the push-pull rod 603 is connected to the base part 6021, a first rotating shaft 608 penetrating through the connecting part 6022 is arranged at the lower end of the connecting part 6022, a second rotating shaft 609 penetrating through the connecting part 6022 is arranged at the upper end of the connecting part 6022, two ends of the first rotating shaft 608 respectively extend out from two sides of the connecting part 6022 and are respectively connected with the connecting rotating plate 614, and the second rotating shaft 609 is rotatably connected with the tail end of the tilting plate 604;

the connecting rotating plate 614 comprises a first strip-shaped portion 6141 and a second strip-shaped portion 6142, wherein one end of each of the first strip-shaped portion 6141 and the second strip-shaped portion 6142 is connected, so that an acute angle is formed between the first strip-shaped portion 6141 and the second strip-shaped portion 6142, a corner portion 6143 is formed at the connecting position of the first strip-shaped portion 6141 and the second strip-shaped portion 6142, and the corner portions 6143 of the two connecting rotating plates 614 are respectively in rotating connection with two ends of the first rotating shaft 608;

one end, opposite to the corner portion 6143, of each of the two first bar-shaped portions 6141 is rotatably connected with the upper end of the push-pull rod 603 through a third rotating shaft 610, a fourth rotating shaft 611 is connected between one ends, opposite to the corner portion 6143, of the two second bar-shaped portions 6142, the fourth rotating shaft 611 is rotatably connected with the rear end of the pressure head 605, the rear end of the pressure head 605 is provided with a switching portion 6051 extending downwards, the switching portion 6051 is rotatably connected with the middle rear portion of the seesaw plate 604 through a fifth rotating shaft 612, and the lower surface of the front end of the pressure head 605 can be in pressing contact with the upper surface of the seesaw plate 604;

the upper end of the push-pull rod 603 is connected with a fixing block 613, the fixing block 613 is provided with a strip-shaped through hole 6131, the third rotating shaft 610 is embedded into the strip-shaped through hole 6131, two ends of the third rotating shaft 610 respectively extend out of the strip-shaped through hole 6131, and the first strip-shaped portions 6141 of the two connecting rotating plates 614 are respectively connected with two ends of the third rotating shaft 610 in a rotating manner.

The cover plate 5 is an iron cover plate; the driving module 607 is a cylinder; the two ends of the first rotating shaft 608, the third rotating shaft 610 and the fourth rotating shaft 611 are respectively provided with a limiting clamping piece 615, the limiting clamping pieces 615 are embedded into the grooves at the two ends of the first rotating shaft 608, the third rotating shaft 610 or the fourth rotating shaft 611, and the inner side surface of the limiting clamping pieces 615 is in contact connection with the outer side surface of the connecting rotating plate 614;

the upper end of the connecting portion 6022 of the fixing seat 602 is provided with a groove for the rear end of the seesaw pressing plate 604 to be inserted into, and the rear end of the seesaw pressing plate 604 is inserted into the groove of the connecting portion 6022 and is rotatably connected with the fixing seat 602 through the second rotating shaft 609.

Example 2: a clamping jig for CNC machining comprises a base plate 1, a carrier plate 2 and a cover plate 5, wherein the carrier plate 2 is fixedly installed on the upper surface of the base plate 1, the upper surface of the carrier plate 2 is in contact connection with the lower surface of a workpiece 3 to be machined, the cover plate 5 is arranged above the workpiece 3, the workpiece 3 on the lower surface of the cover plate 5 is in press fit connection, a plurality of pressure head mechanisms 6 are installed at the peripheral edges of the base plate 1, and the pressure head mechanisms 6 are in press fit connection with the top surface of the cover plate 5;

The number of the pressure head mechanisms 6 is 8, and two pressure head mechanisms are respectively arranged at the four edges of the substrate 1; a handle 7 is respectively arranged on two opposite side surfaces of the cover plate 5; the above-mentioned handle 7 is mounted on the side surface of short side of the cover plate 5;

the cover plate 5 is a plastic cover plate; a bottom plate 8 is arranged right below the substrate 1, the bottom plate 8 is connected with the cover plate 5 through 4 support pillars 9, and the 4 support pillars 9 are respectively positioned at four corners of the bottom plate 8;

the adaptor 6051 at the rear end of the pressing head 605 is two symmetrically arranged adaptor plates, and the warping pressing plate 604 is embedded between the two adaptor plates and is rotatably connected with the two adaptor plates through the fifth rotating shaft 612.

When the clamping jig for CNC machining is adopted, the pressure head mechanism is ingenious in structural design, double pressure is provided by the warping pressure plate and the pressure head through the linkage effect of a plurality of components, the force and the stability of the warping pressure plate for pressing and holding the cover plate are enhanced, the situations of shaking, tool vibration, tool lines and the like caused by insufficient clamping force during machining of a workpiece are avoided, and the stability and the quality of machining of the workpiece are improved; the clamping force of the warping pressing plate can be increased under the condition that the driving force provided by the driving assembly is the same, and further, when the length of the warping pressing plate is long, second stress is provided in the middle of the warping pressing plate through the pressing head, so that the warping pressing plate can clamp a cover plate at a far distance with stable and constant pressure, more space is provided for processing a workpiece, multiple processes can be performed on the workpiece at one time, and the processing effect and efficiency of the workpiece are improved; in addition, through the cooperation setting of push rod pole and each structure for the biggest angle that the perk clamp plate can be opened is greater than 90, is convenient for to the clamping of work piece, and can not injure by the article of centre gripping, has further improved stability and the quality to work piece processing.

During the use, promote the push-and-pull rod through drive assembly and shift up, through the conveying of power for the perk clamp plate moves down and pushes down the apron, and drive assembly continues to drive the push-and-pull rod and shifts up after that, through the further conveying of power, makes the pressure head front end compress tightly the perk clamp plate downwards, provides the second stress for the perk clamp plate, has further strengthened the size and the stability of perk clamp plate to the apron pressure.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a clamping tool for CNC processing which characterized in that: the processing device comprises a base plate (1), a support plate (2) and a cover plate (5), wherein the support plate (2) is fixedly arranged on the upper surface of the base plate (1), the upper surface of the support plate (2) is in contact connection with the lower surface of a workpiece (3) to be processed, the cover plate (5) is arranged above the workpiece (3), the workpiece (3) on the lower surface of the cover plate (5) is in press fit connection, a plurality of pressure head mechanisms (6) are arranged on the peripheral edges of the base plate (1), and the pressure head mechanisms (6) are in press fit connection with the top surface of the cover plate (5);

the pressure head mechanism (6) further comprises a fixing plate (601), a fixing seat (602), a push-pull rod (603), a warping pressing plate (604), a pressure head (605) and two connecting rotating plates (614) symmetrically arranged on two sides of the fixing seat (602), one end of the fixing plate (601) is installed on the substrate (1), a through hole (606) for the push-pull rod (603) to pass through is formed in the other end, away from the substrate (1), of the fixing plate (601), the upper end of the push-pull rod (603) is rotatably connected with the connecting rotating plate (614), and the lower end of the push-pull rod (603) passes through the fixing plate (601) and is connected with a driving assembly (607);

a base part (6021) at the lower end of the fixed seat (602) is fixedly arranged on the upper surface of the fixed plate (601), a connecting part (6022) inclined towards one side of the push-pull rod (603) is connected on the base part (6021), a first rotating shaft (608) penetrating through the connecting part (6022) is arranged at the lower end of the connecting part (6022), a second rotating shaft (609) penetrating through the connecting part (6022) is arranged at the upper end of the connecting part (6022), two ends of the first rotating shaft (608) respectively extend out from two sides of the connecting part (6022) and are respectively connected with the connecting rotating plate (614), and the second rotating shaft (609) is rotatably connected with the tail end of the tilting plate (604);

the connecting rotating plate (614) comprises a first strip-shaped part (6141) and a second strip-shaped part (6142), one end of each of the first strip-shaped part (6141) and the second strip-shaped part (6142) is connected, so that an acute angle is formed between the first strip-shaped part (6141) and the second strip-shaped part (6142), a corner part (6143) is formed at the connection position of the first strip-shaped part (6141) and the second strip-shaped part (6142), and the corner parts (6143) of the two connecting rotating plates (614) are respectively in rotating connection with two ends of the first rotating shaft (608);

one end, opposite to the corner part (6143), of each of the two first strip-shaped parts (6141) is rotatably connected with the upper end of the push-pull rod (603) through a third rotating shaft (610), a fourth rotating shaft (611) is connected between one ends, opposite to the corner part (6143), of the two second strip-shaped parts (6142), the fourth rotating shaft (611) is rotatably connected with the rear end of the pressing head (605), the rear end of the pressing head (605) is provided with a switching part (6051) extending downwards, the switching part (6051) is rotatably connected with the middle rear part of the tilting plate (604) through a fifth rotating shaft (612), and the lower surface of the front end of the pressing head (605) can be in pressing contact with the upper surface of the tilting plate (604);

the upper end of the push-pull rod (603) is connected with a fixing block (613), a strip-shaped through hole (6131) is formed in the fixing block (613), the third rotating shaft (610) is embedded into the strip-shaped through hole (6131), two ends of the third rotating shaft (610) respectively extend out of the strip-shaped through hole (6131), and the first strip-shaped portions (6141) of the two connecting rotating plates (614) are respectively connected with two ends of the third rotating shaft (610) in a rotating mode.

2. The clamping jig for CNC machining of claim 1, characterized in that: the driving component (607) is a cylinder.

3. The clamping jig for CNC machining of claim 1, characterized in that: the limiting clamping pieces (615) are mounted at two ends of the first rotating shaft (608), the third rotating shaft (610) and the fourth rotating shaft (611), the limiting clamping pieces (615) are embedded into grooves at two ends of the first rotating shaft (608), the third rotating shaft (610) or the fourth rotating shaft (611), and the inner side surfaces of the limiting clamping pieces (615) are in contact connection with the outer side surfaces of the connecting rotating plates (614).

4. The clamping jig for CNC machining of claim 1, characterized in that: the number of the pressure head mechanisms (6) is 8, and two pressure head mechanisms are respectively arranged at the four edges of the base plate (1).

5. The clamping jig for CNC machining of claim 1, characterized in that: and two opposite side surfaces of the cover plate (5) are respectively provided with a handle (7).

6. The clamping jig for CNC machining of claim 5, characterized in that: the handle (7) is mounted on the side surface of the short side of the cover plate (5).

7. The clamping jig for CNC machining of claim 1, characterized in that: the cover plate (5) is an iron cover plate or a plastic cover plate.

8. The clamping jig for CNC machining of claim 1, characterized in that: a bottom plate (8) is arranged right below the base plate (1), and the bottom plate (8) is connected with the cover plate (5) through a plurality of supporting columns (9).

9. The clamping jig for CNC machining of claim 8, characterized in that: the bottom plate (8) is connected with the cover plate (5) through 4 support columns (9), and the 4 support columns (9) are respectively positioned at four corners of the bottom plate (8).