CN212858675U

CN212858675U - Automatic clamping device for CNC milling machine

Info

Publication number: CN212858675U
Application number: CN202021220940.9U
Authority: CN
Inventors: 李�真
Original assignee: Jincheng College of Sichuan University
Current assignee: Jincheng College of Sichuan University
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2021-04-02
Anticipated expiration: 2030-06-28

Abstract

The utility model discloses an automatic clamping device for CNC milling machine, including clamping mechanism, clamping mechanism includes pneumatic cylinder, motor, pressure arm, pressure head, coupling mechanism and guiding mechanism, and the pneumatic cylinder output lever is vertical upwards, and the pneumatic cylinder output lever rotationally connects the one end of pressure arm, and the other end of pressure arm passes through guiding mechanism and connects the pressure head, and guiding mechanism is used for adjusting the height of pressure head, and the clamping mechanism bottom is connected the recess on the processing platform of milling machine; coupling mechanism includes first gear and second gear, the first gear of motor output shaft fixed connection, presses arm fixed connection second gear, first gear and second gear engagement, and the motor output shaft is parallel with the pneumatic cylinder output rod, and the axial length of first gear and second gear is inequality to the axial length of the longer gear of axial length is greater than the stroke of pneumatic cylinder, has solved the technical problem that exists among the prior art, if: the manual clamping device has high labor intensity and the automatic clamping device cannot effectively and automatically avoid the milling head.

Description

Automatic clamping device for CNC milling machine

Technical Field

The utility model relates to a porous part boring grab field is an automatic clamping device for CNC milling machine particularly.

Background

The numerical control milling machine is also called cnc (computerized numerical control) milling machine. English means a milling machine controlled by an electronic counter.

The numerical control milling machine is an automatic processing device developed on the basis of a common milling machine, the processing technologies of the two are basically the same, and the structures are somewhat similar. The numerical control milling machine is divided into two categories, namely a tool magazine without tool magazine and a tool magazine with tool magazine. Wherein take numerically controlled fraise machine of tool magazine also is called machining center, prior art adds man-hour to the machined part, clamping device who often needs to install on the milling machine carries out the auxiliary clamping, nevertheless in some frequent clamping process that need be continuous, need to carry out repetition unclamp and press from both sides to the machined part, current clamping device divide into usually manually and automatic, manual intensity of labour is too big, however its form that is cylinder or pneumatic cylinder usually of automatic clamping device, its elasticity direction is single vertical direction, to some contour machining of machined part, it is required that it unclamps in order to dodge the cutter head, nevertheless its form straight from top to bottom can not effectively dodge, and to the milling machine processing platform of different specifications, current clamping device adaptation that also can not be fine, to sum up, it exists in the prior art: the manual clamping device has high labor intensity and the automatic clamping device can not effectively and automatically avoid the milling head.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, the present invention is directed to: the utility model provides an automatic clamping device for CNC milling machine for solve technical problem that exists among the prior art, like: the manual clamping device has high labor intensity and the automatic clamping device cannot effectively and automatically avoid the milling head.

In order to realize the purpose of the utility model, the utility model provides a following technical scheme:

the utility model provides an automatic clamping device for CNC milling machine, includes clamping mechanism, its characterized in that, clamping mechanism includes pneumatic cylinder, motor, pressure arm, pressure head, coupling mechanism and guiding mechanism, the pneumatic cylinder output lever is vertical upwards, the pneumatic cylinder output lever rotationally connects the one end of pressure arm, the other end of pressure arm passes through guiding mechanism connects the pressure head, guiding mechanism is used for the adjustment the height of pressure head, the clamping mechanism bottom is used for connecting CNC milling machine's processing platform.

The connecting mechanism comprises a first gear and a second gear, the motor output shaft is fixedly connected with the first gear, the pressing arm is fixedly connected with the second gear, the first gear is meshed with the second gear, the motor output shaft is parallel to the hydraulic cylinder output rod, the axial length of the first gear is different from that of the second gear, and the axial length of the gear with the longer axial length is larger than the stroke of the hydraulic cylinder.

Furthermore, the pressure head is of an L-shaped structure, the L-shaped structure is used for clamping the edge angle of the upper end face of the workpiece, and the pressure arm is a telescopic rod.

Further, the hydraulic cylinder and the motor are fixedly connected at the top of the mounting plate, two grooves are formed in the bottom of the mounting plate, the two rotating screws are respectively arranged in the two grooves, the two rotating screws are rotatably connected with the mounting plate, the two rotating screws are parallel to each other and perpendicular to the first stop block, the first stop block is fixedly connected with the bottom of the mounting plate, the second stop block is parallel to the first stop block, two bulges are arranged at the top of the second stop block and are respectively slidably arranged in the two grooves, the two bulges are provided with threaded holes matched with the rotating screws, the two bulges are respectively in threaded connection with the two rotating screws, and one ends of the two rotating screws, which are far away from the first stop block, are fixedly connected with rotating blocks, the rotating block is used for rotating the rotating screw rod, and the first stop block and the second stop block are used for being inserted into a groove on a machining table of the CNC milling machine.

Further, guiding mechanism is including preventing pivot, adjusting screw and two nuts, the pressure head set up in press the arm below, pressure head top fixed connection prevent the pivot with adjusting screw's one end, prevent the pivot with adjusting screw is parallel, prevent the pivot with adjusting screw slidable ground runs through press the arm, two equal threaded connection of nut adjusting screw, press the arm set up in between two nuts.

Furthermore, four clamping mechanisms are arranged and are uniformly distributed on the mounting plate.

Furthermore, the length of the rotation preventing shaft is the same as that of the adjusting screw rod.

Furthermore, the second gear is provided with a cavity, the bottom end face of the second gear is fixedly connected with the top end face of the pressure arm, the hydraulic cylinder output rod penetrates through the pressure arm and is arranged in the cavity, and the hydraulic cylinder output rod is connected with the inner wall of the cavity through a bearing.

Compared with the prior art, the utility model, following beneficial effect has:

1. through the meshing relation and the big or small relation of first gear and second gear, the motor can control the pressure arm and turn to after, does not influence pneumatic cylinder lift pressure arm, in the scene that needs frequent clamping to loosen, is convenient for unclamp the clamp and dodge the cutter head automatically, has reduced relevant personnel's intensity of labour, has improved degree of automation, has reached the beneficial effect of being convenient for automatic elasticity and dodging the cutter head.

2. When rotating the rotation screw rod through the turning block, the distance between second dog and the first dog can obtain changing, so can adjust the elasticity degree of mounting panel and processing platform, can fix on the processing platform of different specifications as required moreover, has reached the beneficial effect of the processing platform of the different specifications of adaptation of being convenient for.

3. Through adjusting the position of two nuts on adjusting screw, alright in order to adjust the height of pressure head to adaptation machined part not co-altitude, and there is the condition of different height differences in machined part terminal surface, reached the beneficial effect of the height-adjusting of being convenient for.

Drawings

Fig. 1 is an overall structure diagram of a clamping mechanism of an automatic clamping device for a CNC milling machine according to the present invention;

FIG. 2 is a schematic view of the clamping mechanism in a clamped state;

FIG. 3 is a schematic view of the initial state of the clamping mechanism;

FIG. 4 is a schematic cross-sectional view of an adjustment mechanism;

FIG. 5 is a schematic bottom view of the mounting plate;

FIG. 6 is a schematic view showing the connection of the mounting plate, the second stopper, the rotary screw and the processing table.

List of reference numerals

1-a hydraulic cylinder, 2-a motor, 2, 3-a mounting plate, 4-a first gear, 5-a second gear, 6-a pressure arm, 7-a pressure head, 8-an anti-rotation shaft, 9-an adjusting screw, 10-a nut, 11-a processing table, 12-a processing piece, 13-a bearing, 14-a first stop block, 15-a second stop block and 16-a rotating screw.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings of fig. 1-6, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, a fixed connection, an integral connection, or a detachable connection; may be communication within two elements; they may be directly connected or indirectly connected through an intermediate, and those skilled in the art can understand the specific meaning of the above terms in the present invention in specific situations.

The utility model provides an automatic clamping device for CNC milling machine, includes clamping mechanism, its characterized in that, clamping mechanism includes pneumatic cylinder 1, motor 2, presses arm 6, pressure head 7, coupling mechanism and guiding mechanism, 1 output pole of pneumatic cylinder is vertical upwards, 1 output pole of pneumatic cylinder is rotationally connected press the one end of arm 6, press the other end of arm 6 to pass through guiding mechanism connects pressure head 7, guiding mechanism is used for the adjustment the height of pressure head 7, the clamping mechanism bottom is used for connecting CNC milling machine's processing platform 11.

The connecting mechanism comprises a first gear 4 and a second gear 5, an output shaft of the motor 2 is fixedly connected with the first gear 4, the pressing arm 6 is fixedly connected with the second gear 5, the first gear 4 is meshed with the second gear 5, the output shaft of the motor 2 is parallel to an output rod of the hydraulic cylinder 1, the axial lengths of the first gear 4 and the second gear 5 are different, and the axial length of the gear with the longer axial length is larger than the stroke of the hydraulic cylinder 1.

As shown in fig. 1, the hydraulic cylinder 1 and the motor 2 are arranged side by side, the first gear 4 and the second gear 5 are meshed with each other, and the bottom end faces are flush, because the output rod of the hydraulic cylinder 1 is vertically upward, the second gear 5 can slide relative to the first gear 4 in the vertical direction under the driving of the hydraulic cylinder 1, and when the second gear 5 moves up and down, in order to ensure that the two gears are always in a meshed state, the two gears need to be arranged in a large and small manner, the axial length of the larger gear is greater than the stroke of the hydraulic cylinder 1, that is, in the stroke range of the hydraulic cylinder 1, the two gears are in a meshed state.

In actual operation, the hydraulic cylinder 1 drives the pressing arm 6 and further causes the pressing head 7 to press the workpiece 12, so as to perform a clamping function, in a milling process requiring frequent clamping and releasing, the hydraulic cylinder 1 can be controlled to lift the pressing arm 6, because the pressing arm 6 is rotatably connected with an output rod of the hydraulic cylinder 1, the motor 2 rotates after the lifting of the pressing arm 6 to drive the first gear 4 and the second gear 5 to rotate, and the pressing arm 6 rotates to leave the surface of the workpiece, in this process, not only can the pressing arm 6 and the pressing head 7 be automatically released, but also the pressing arm 6 can be automatically avoided when the pressing arm 6 needs to avoid the milling head, similarly, when re-clamping is required after the above process, the motor 2 rotates to enable the pressing arm 6 to return to the clamping initial position, then the hydraulic cylinder 1 lowers the pressing arm 6 to enable the pressing head 7 to press the workpiece 12, in conclusion, through the meshing relationship between the first gear 4 and the second gear 5 and the, after the motor 2 can control the pressure arm 6 to turn, the hydraulic cylinder 1 is not influenced to lift the pressure arm 6, in a scene needing frequent clamping and loosening, clamping and avoiding of the milling head are convenient to automatically loosen, the labor intensity of related personnel is reduced, the automation degree is improved, and the beneficial effects of being convenient for automatically loosening and avoiding the milling head are achieved.

Further, the pressure head 7 is of an L-shaped structure, the L-shaped structure is used for clamping the edge angle of the upper end face of the workpiece 12, the pressure arm 6 is a telescopic rod, the L-shaped structure is convenient for clamping the edge angle of the upper end face of the workpiece 12, and the telescopic rod can be adjusted according to the sizes of different workpieces.

Further, the device comprises a mounting plate 3, a first stop block 14, a second stop block 15 and two rotating screws 16, wherein the top of the mounting plate 3 is fixedly connected with the hydraulic cylinder 1 and the motor 2, the bottom of the mounting plate 3 is provided with two grooves, the two rotating screws 16 are respectively arranged in the two grooves, the two rotating screws 16 are both rotatably connected with the mounting plate 3, the two rotating screws 16 are parallel to each other and perpendicular to the first stop block 14, the first stop block 14 is fixedly connected with the bottom of the mounting plate 3, the second stop block 15 is parallel to the first stop block 14, the top of the second stop block 15 is provided with two bulges which are respectively slidably arranged in the two grooves, the two bulges are provided with threaded holes matched with the rotating screws 16, and the two bulges are respectively in threaded connection with the two rotating screws 16, one ends of the two rotating screws 16, which are far away from the first stop block 14, are fixedly connected with a rotating block, the rotating block is used for rotating the rotating screws 16, and the first stop block 14 and the second stop block 15 are used for being inserted into a groove on a machining table 11 of the CNC milling machine.

As shown in fig. 4 and 5, since the rotating screw 16 is in threaded connection with the protrusion of the second stopper 15, and the protrusion can slide in the groove at the bottom of the mounting plate 3, when the rotating screw 16 is rotated by the rotating block, the distance between the second stopper 15 and the first stopper 14 can be changed, so that when the first stopper 14 and the second stopper 15 are inserted into the groove on the processing table 11, the rotating screw 16 can be rotated by the rotating block to adjust the tightness degree between the mounting plate 3 and the processing table 11, so as to fix the whole device on the processing table 11, and the device can be fixed on the processing tables 11 of different specifications as required, thereby achieving the beneficial effect of being convenient for adapting to the processing tables 11 of different specifications.

Further, guiding mechanism is including preventing pivot 8, adjusting screw 9 and two nuts 10, pressure head 7 set up in press 6 below of arm, 7 top fixed connection of pressure head prevent pivot 8 with adjusting screw 9's one end, prevent pivot 8 with adjusting screw 9 is parallel, prevent pivot 8 with adjusting screw 9 slidable runs through press arm 6, the equal threaded connection of two nuts 10 adjusting screw 9, press arm 6 set up in between two nuts 10.

Furthermore, four clamping mechanisms are arranged around the workpiece 12 and are all connected with a controller.

Four that are "ten" font and arrange clamping mechanism can carry out effective spacing to four directions of machined part 12, has played the effect of firm machined part 12, and each clamping mechanism all is connected with the controller, the controller all can be adjusted alone to each clamping mechanism, as shown in fig. 3, be clamping mechanism's initial condition this moment, pressure arm 6 rotates certain angle in order to make things convenient for machined part 12 to put into, put into machined part 12 after, controller control motor 2 rotates, when pressure arm 6 reaches machined part surface top, the pneumatic cylinder 1 of controlling again reduces pressure arm 6, when needing later to loosen or dodge the cutter head, pneumatic cylinder 1 that the controller can be in a certain clamping mechanism of independent control rises pressure arm 6, then motor 2 rotates of controlling again, after the processing is accomplished, the controller is the clamping mechanism of controlling again and is resumeed initial condition.

The controller is current conventional technology, and this technical field personnel of its erection joint mode can realize completely, the utility model discloses do not relate to so no longer give unnecessary details to the transformation of controller.

The rotation preventing shaft 8 plays a role in limiting the rotation of the pressure head 7, the height of the pressure head 7 can be adjusted by adjusting the positions of the two nuts 10 on the adjusting screw rod 9, the pressure head 7 can be fastened to adapt to different heights of the machined part 12, the end faces of the machined part 12 have different height differences, and the beneficial effect of facilitating height adjustment is achieved.

Further, the length of the rotation preventing shaft 8 is the same as that of the adjusting screw 9.

Furthermore, the second gear 5 is provided with a cavity, the bottom end face of the second gear 5 is fixedly connected with the top end face of the pressure arm 6, the output rod of the hydraulic cylinder 1 penetrates through the pressure arm 6 and is arranged in the cavity, and the output rod of the hydraulic cylinder 1 is connected with the inner wall of the cavity through a bearing 13.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the embodiments in the above description, and the technical concept of the present invention can be within the scope of the present invention, and can be modified to various simple modifications, and these simple modifications all belong to the protection scope of the present invention. It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present invention does not need to describe any combination of the features. In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.

Claims

1. An automatic clamping device for a CNC milling machine comprises a clamping mechanism, and is characterized in that the clamping mechanism comprises a hydraulic cylinder (1), a motor (2), a pressing arm (6), a pressing head (7), a connecting mechanism and an adjusting mechanism, wherein an output rod of the hydraulic cylinder (1) is vertically upward, the output rod of the hydraulic cylinder (1) is rotatably connected with one end of the pressing arm (6), the other end of the pressing arm (6) is connected with the pressing head (7) through the adjusting mechanism, the adjusting mechanism is used for adjusting the height of the pressing head (7), and the bottom of the clamping mechanism is used for being connected with a processing table (11) of the CNC milling machine;

coupling mechanism includes first gear (4) and second gear (5), motor (2) output shaft fixed connection first gear (4), press arm (6) fixed connection second gear (5), first gear (4) with second gear (5) meshing, motor (2) output shaft with pneumatic cylinder (1) output pole is parallel, first gear (4) with the axial length of second gear (5) is inequality, and the axial length of the longer gear of axial length is greater than the stroke of pneumatic cylinder (1).

2. The automatic clamping device for the CNC milling machine is characterized in that the pressing head (7) is of an L-shaped structure, the L-shaped structure is used for clamping the upper end face corner of a workpiece (12), and the pressing arm (6) is a telescopic rod.

3. The automatic clamping device for the CNC milling machine is characterized by further comprising a mounting plate (3), a first stop block (14), a second stop block (15) and two rotating screws (16), wherein the top of the mounting plate (3) is fixedly connected with the hydraulic cylinder (1) and the motor (2), the bottom of the mounting plate (3) is provided with two grooves, the two rotating screws (16) are respectively arranged in the two grooves, the two rotating screws (16) are both rotatably connected with the mounting plate (3), the two rotating screws (16) are parallel to each other and perpendicular to the first stop block (14), the first stop block (14) is fixedly connected with the bottom of the mounting plate (3), the second stop block (15) is parallel to the first stop block (14), and the top of the second stop block (15) is provided with two bulges, the two bulges are slidably arranged in the two grooves respectively, the two bulges are provided with threaded holes matched with the rotating screw rods (16), the two bulges are in threaded connection with the two rotating screw rods (16) respectively, the two rotating screw rods (16) are far away from one end fixedly connected with rotating blocks of the first stop block (14), the rotating blocks are used for rotating the rotating screw rods (16), and the first stop block (14) and the second stop block (15) are used for being inserted into the grooves in the machining table (11) of the CNC milling machine.

4. The automatic clamping device for the CNC milling machine according to claim 1, characterized in that the adjusting mechanism comprises a rotation preventing shaft (8), an adjusting screw (9) and two nuts (10), the pressure head (7) is arranged below the pressure arm (6), the top of the pressure head (7) is fixedly connected with one end of the rotation preventing shaft (8) and one end of the adjusting screw (9), the rotation preventing shaft (8) is parallel to the adjusting screw (9), the rotation preventing shaft (8) and the adjusting screw (9) slidably penetrate through the pressure arm (6), the two nuts (10) are both in threaded connection with the adjusting screw (9), and the pressure arm (6) is arranged between the two nuts (10).

5. The automatic clamping device for the CNC milling machine of claim 3, wherein the clamping mechanism is four in number and is uniformly arranged on the mounting plate.

6. The automatic clamping device for CNC milling machine according to claim 4, characterized in that the rotation-preventing shaft (8) is the same length as the adjusting screw (9).

7. The automatic clamping device for the CNC milling machine is characterized in that the second gear (5) is provided with a cavity, the bottom end face of the second gear (5) is fixedly connected with the top end face of the pressing arm (6), the output rod of the hydraulic cylinder (1) penetrates through the pressing arm (6) and is arranged in the cavity, and the output rod of the hydraulic cylinder (1) is connected with the inner wall of the cavity through a bearing (13).