CN220613153U

CN220613153U - Zero point positioning mechanism in CNC machine

Info

Publication number: CN220613153U
Application number: CN202322351235.2U
Authority: CN
Inventors: 丁大勇
Original assignee: Guangzhou Shenyong Intelligent Equipment Co ltd
Current assignee: Guangzhou Shenyong Intelligent Equipment Co ltd
Priority date: 2023-08-30
Filing date: 2023-08-30
Publication date: 2024-03-19
Anticipated expiration: 2033-08-30

Abstract

The application relates to a CNC machine zero point positioning mechanism, wherein a plurality of mounting cavities are arranged on a zero point substrate, and air holes communicated with an air channel are arranged in the mounting cavities; the piston is installed in the installation cavity, and the air channel blows air into the installation cavity through the air hole to drive the piston to move up and down in the installation cavity; the zero pulling plate is driven to move up and down by the piston; and the clamp tray is pushed into or pulled out of the machine tool workbench in a push-pull manner, and after being pushed into the machine tool workbench, the clamp tray is limited between the clamp tray and the zero-point pulling plate, so that the clamp tray moves up and down along with the zero-point pulling plate. After the zero point pulling plate moves upwards, the clamp tray can be normally pushed to the machine tool workbench from the first heavy-load guide rail, and the clamp tray can be pushed to the first heavy-load guide rail from the machine tool workbench, so that the clamp tray can be conveniently and quickly replaced; and the zero pulling plate can drive the clamp tray to move downwards and lock after moving downwards, so that the locking action is completed rapidly.

Description

Zero point positioning mechanism in CNC machine

Technical Field

The utility model relates to the technical field of automation equipment, in particular to an in-machine zero point positioning mechanism of a CNC (computerized numerical control).

Background

The CNC equipment performs automatic precision machining on various products, and at present, a zero point clamp in the CNC equipment mainly comprises a blind rivet structure, the taking-out stroke is large, and manual operation mostly adopts a small zero point; the heavy zero point adopts robot or aerial crane electric hoist to go up the unloading more, and clamping speed is slow, uses the robot cost higher, and this kind of zero point anchor clamps can't satisfy the commonality.

Accordingly, the applicant has improved the prior art.

Disclosure of Invention

In view of this, the present utility model provides a CNC machine zero point positioning mechanism.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: zero point positioning mechanism in CNC machine installs in the lathe workstation department of CNC machine, includes:

the zero base plate is arranged at the working table of the machine tool, a plurality of mounting cavities are arranged on the zero base plate, and air holes communicated with the air channels are arranged in the mounting cavities;

the piston is arranged in the mounting cavity of the zero substrate, and the air channel blows air into the mounting cavity through the air hole to drive the piston to move up and down in the mounting cavity; the zero pulling plate is arranged above the zero base plate in a limiting way and is driven to move up and down by a piston;

and the clamp tray is pushed into the machine tool workbench in a push-pull manner or pulled out from the machine tool workbench, and after being pushed into the machine tool workbench, the clamp tray is limited between the clamp tray and the zero-point pulling plate, so that the clamp tray moves up and down along with the zero-point pulling plate.

In a preferred aspect of the present utility model, after the clamp tray is pushed into the machine tool workbench, the clamp tray and the zero point pulling plate are at least limited in the longitudinal direction.

As a preferred aspect of the present utility model, the jig tray includes: the support plate and the limiting blocks are symmetrically arranged on two sides of the lower surface of the support plate, and a space for embedding the zero pull plate is formed between the two limiting blocks; when the clamp tray is pushed into the machine tool workbench, the zero pull plate is correspondingly embedded into the space between the two limiting blocks, so that the clamp tray and the zero pull plate are limited in the horizontal direction.

As a preferable scheme of the utility model, the corresponding side surfaces of the two limiting blocks are provided with a first clamping surface and a second clamping surface which are in a step shape; the two sides of the zero-point pulling plate are provided with a third clamping surface and a fourth clamping surface which are reverse-step-shaped, so that the clamp tray and the zero-point pulling plate are limited in the longitudinal direction; the side that two stopper deviate from mutually is provided with the protection baffle, and the protection baffle shelters from the clearance between stopper and the zero point base plate.

As a preferred embodiment of the present utility model, the method further comprises: an auxiliary rolling member;

the auxiliary rolling member is exposed on the upper surface of the zero-point pulling plate, and the clamp tray is moved in an auxiliary manner by the auxiliary rolling member when being pushed into or pulled out of the machine tool workbench.

As a preferred embodiment of the present utility model, the method further comprises: an auxiliary positioning mechanism;

the clamp tray is abutted against the auxiliary positioning mechanism when being completely pushed into the machine tool workbench.

As a preferred aspect of the present utility model, the piston includes: the pushing part, the pushing rod, the piston cover plate and the spring are fixedly connected;

the pushing part is matched with the shape of the mounting cavity, and a sealing ring is arranged between the pushing part and the inner wall of the mounting cavity;

the piston cover plate is sleeved at the pushing rod and is fixed in the mounting cavity;

the spring is connected between the pushing part and the piston cover plate and provides elastic force relatively far away from the pushing part and the piston cover plate.

As a preferred embodiment of the present utility model, the air hole includes: the first air hole is arranged on the inner bottom wall of the mounting cavity.

As a preferred embodiment of the present utility model, the air hole further includes: a second air hole; the second air hole is formed in the inner side wall of the mounting cavity and is positioned between the pushing part and the piston cover plate.

As a preferred embodiment of the present utility model, the method further comprises: a guide member;

the guide piece is arranged between the zero base plate and the zero pulling plate and guides the zero pulling plate to move up and down.

Compared with the prior art, the utility model has the following beneficial technical effects: the utility model can realize the rapid positioning and locking of the clamp tray after replacement and has compact structure; a piston is arranged in the zero base plate, the zero pull plate is driven to move upwards and downwards by the piston, and then the clamp tray is driven to move upwards and downwards, after the zero pull plate moves upwards, the clamp tray can be normally pushed to a machine tool workbench from a first heavy-load guide rail, and the clamp tray is pushed to the first heavy-load guide rail from the machine tool workbench, so that the clamp tray can be conveniently and quickly replaced; the zero pulling plate can drive the clamp tray to move downwards and lock after moving downwards, so that the locking action is completed quickly;

in addition, the two sides of the clamp tray are also provided with protective baffles, so that scrap iron, waste slag and the like can be prevented from entering the CNC machine inner zero point positioning mechanism.

The other beneficial technical effects of the utility model are embodied in the specific embodiments.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a CNC machine zero point positioning mechanism of the present utility model;

FIG. 2 is a schematic front view of the CNC machine zero point positioning mechanism of the present utility model;

FIG. 3 is an exploded view of the CNC machine zero point positioning mechanism of the present utility model;

FIG. 4 is a further exploded view of the CNC machine zero point positioning mechanism of the present utility model;

FIG. 5 is an enlarged view of FIG. 4 at A;

FIG. 6 is an exploded view of a piston in the CNC machine zero positioning mechanism of the present utility model;

FIG. 7 is a schematic diagram of the CNC machine of the present utility model with the zero point positioning mechanism;

FIG. 8 is a schematic diagram of a CNC machine zero point positioning mechanism and multi-station CNC feeding mechanism combination according to the present utility model.

Reference numerals illustrate:

CNC machine 00; a machine tool workbench 01; a jig tray 300; a first clamping surface 301; a second clamping surface 302; a pallet 310; a stopper 320; a protective baffle 330; a zero-point substrate 700; a mounting cavity 710; a first air hole 711; a second air hole 712; a guide 720; a piston 800; a tank 801; a pushing part 810; a seal ring 811; pushing the lever 820; a piston cover plate 830; a spring 840; zero tie plate 900;

a third clamping surface 901; a fourth clamping surface 902; an auxiliary rolling member 910; a roller bracket 911; a roller 912; a cavity 920.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.

As shown in fig. 7, the zero point positioning mechanism in the CNC machine is installed at a machine tool table 01 of the CNC machine 00, and the specific model of the CNC machine 00 is not limited. In the CNC machine 00, a corresponding machining manipulator should be provided, so that the product on the machine tool workbench 01 can be machined correspondingly;

it should be noted that, when products with different specifications/types are processed, the structure of the clamp adopted on the machine tool workbench 01 should be different, one CNC device should replace the clamp when processing products with different specifications/types, the clamp has large weight and large volume, the replacement is inconvenient, and the replacement step is complicated;

furthermore, when processing products of the same specification/type, the weight of some products is large, the manual replacement is inconvenient, the internal space of the CNC machine 00 is limited, and the processed products and unprocessed products are difficult to directly replace in the CNC machine 00;

in the use, no matter whether the clamp needs to be replaced for processing products of different models, or the processed products and unprocessed products need to be fed and discharged, the clamp needs to be integrally taken out from the machine tool workbench 01 for operation, and the clamp needs to be accurately positioned again after being taken out and placed, so that the follow-up accurate processing is facilitated. In order to facilitate the positioning after the clamp replacement, the following scheme is provided:

CNC machine zero point positioning mechanism, as shown in fig. 1-6, includes:

the zero substrate 700 is arranged at the position of the machine tool workbench 01, a plurality of mounting cavities 710 are arranged on the zero substrate 700, and air holes communicated with the air channels are arranged in the mounting cavities 710;

the piston 800 is arranged in the installation cavity 710 of the zero substrate 700, and the air channel blows air into the installation cavity 710 through the air holes to drive the piston 800 to move up and down in the installation cavity 710;

the zero pull plate 900 is arranged above the zero base plate 700 in a limiting manner and is driven to move up and down by the piston 800;

the clamp tray 300 is pushed into the machine tool workbench 01 in a push-pull mode or pulled out of the machine tool workbench 01, and after the clamp tray 300 is pushed into the machine tool workbench 01, the clamp tray 300 and the zero point pulling plate 900 are limited, so that the clamp tray 300 moves up and down along with the zero point pulling plate 900.

The machine tool table 01 is installed inside the CNC machine 00, as shown in fig. 7, the machine tool table 01 is mainly used for carrying a zero substrate 700, and in this embodiment, the machine tool table 01 has a plate-shaped structure.

The zero substrate 700 is mounted at the machine tool workbench 01, and the mounting cavity 710 is formed from the upper surface of the zero substrate 700, but does not penetrate through the lower surface of the zero substrate 700;

the piston 800 is movably installed in the installation cavity 710, and the piston 800 is connected with the zero point pulling plate 900, and the piston 800 pushes the zero point pulling plate 900 to move up and down.

The piston 800 and the zero pull plate 900 are locked by pins;

and a guide 720 between the zero base plate 700 and the zero pull plate 900, the zero pull plate 900 is guided to move up and down by the guide 720.

As shown in fig. 3, the guide 720 may be a short guide bar disposed between the zero base plate 700 and the zero pull plate 900.

Further, the air passage may be connected to an air blowing device, and the air blowing device blows air into the installation cavity 710 through the air passage and the air hole.

Further, after the fixture tray 300 is pushed into the machine tool workbench 01, the fixture tray 300 and the zero point pulling plate 900 are at least limited in the longitudinal direction;

when in use, the clamp tray 300 needs to be pushed into the machine tool workbench 01 or pulled out from the machine tool workbench 01, the piston 800 moves upwards to jack up the zero point pulling plate 900, and the clamp tray 300 can be pushed in or pulled out smoothly; after the clamp tray 300 is arranged above the zero-point pulling plate 900, when a machining manipulator in the CNC machine 00 is used for machining a product on the clamp tray 300, the piston 800 moves downwards to drive the zero-point pulling plate 900 to move downwards, and meanwhile, as the clamp tray 300 and the zero-point pulling plate 900 are limited in the longitudinal direction, the zero-point pulling plate 900 drives the clamp tray 300 to move downwards and locks the clamp tray 300, so that a positioning effect is achieved; while preventing movement of the clamp tray 300 during processing.

In one embodiment, as shown in fig. 2-4, the clamp tray 300 includes: the support plate 310 and the limiting blocks 320, the limiting blocks 320 are symmetrically arranged at two sides of the lower surface of the support plate 310, a space for embedding the zero-point pulling plate 900 is formed between the two limiting blocks 320, when the clamp tray 300 is pushed into the machine tool workbench 01, the zero-point pulling plate 900 is correspondingly embedded into the space between the two limiting blocks 320, so that the clamp tray 300 and the zero-point pulling plate 900 are limited in the horizontal direction, as shown in fig. 2, namely, the clamp tray 300 cannot horizontally move left and right on the zero-point pulling plate 900; as shown in fig. 2, the corresponding side surfaces of the two limiting blocks 320 are provided with a first clamping surface 301 and a second clamping surface 302 in a step shape; the third clamping surface 901 and the fourth clamping surface 902 which are in reverse step shape are arranged on two sides of the zero-point pulling plate 900, so that the clamp tray 300 and the zero-point pulling plate 900 are limited in the longitudinal direction, namely, the third clamping surface 901 and the fourth clamping surface 902 on two sides of the zero-point pulling plate 900 are correspondingly and locally pressed on the first clamping surface 301 and the second clamping surface 302 of the clamp tray 300, the clamp tray 300 is locked, and the clamp tray 300 cannot be separated from the zero-point pulling plate 900 upwards.

The supporting plate 310 and the limiting block 320 may be in an integral structure or a split structure.

Further, the sides of the two limiting blocks 320 facing away from each other are provided with a protective baffle 330, and the protective baffle 330 shields the gap between the limiting block 320 and the zero substrate 700; as shown in fig. 2, during the processing, the scrap iron, the waste slag and the like cannot enter the inside of the zero point positioning mechanism in the CNC machine due to the shielding of the protective baffle 330, so that the scrap iron, the waste slag and the like are prevented from affecting the operation of the zero point positioning mechanism in the CNC machine.

The fixture tray 300 should also be provided with a fixture/mold, etc., so as to facilitate the clamping or positioning installation of the product and the subsequent processing; in this embodiment, the jigs/molds on the jig tray 300 are not shown yet, and should be set according to the specific type of the CNC machine 00; the clamp/mold, etc. is fixed to the clamp tray 300 to move along with the clamp tray 300;

further, the dimensions of the jig tray 300 are set according to the actual use requirements, as shown in fig. 1 to 4, and as shown in fig. 1, the length of the jig tray 300 in the Y direction is smaller than the width in the X direction; in the case of the CNC machine 00, as shown in fig. 7 to 8, the length of the jig tray 300 in the Y direction may be set to be longer than the width in the X direction, and the length and width of the jig tray 300 may be set as needed.

In one embodiment, as shown in fig. 3 and 4, further comprising: an auxiliary rolling member 910;

the auxiliary rolling member 910 is exposed on the upper surface of the zero point pulling plate 900, and the clamp tray 300 is moved in an auxiliary manner by the auxiliary rolling member 910 when being pushed into or pulled out of the machine tool workbench 01;

as shown in fig. 4, the auxiliary rolling member 910 includes: the roller 912 is rotatably mounted to the roller bracket 911 with a horizontal axis, and the side surface of the roller 912 is in contact with the lower surface of the jig tray 300.

A cavity 920 for assembling the auxiliary rolling member 910 is arranged at the zero point pulling plate 900, and the cavity 920 is formed from the upper surface of the zero point pulling plate 900 but does not penetrate through the lower surface of the zero point pulling plate 900; the roller support 911 is fixedly mounted within the cavity 920.

The auxiliary rolling members 910 are provided in plurality and are linearly distributed along the moving direction of the jig pallet 300 on the zero line drawing plate 900.

In one embodiment, the method further comprises: an auxiliary positioning mechanism;

the clamp tray 300 is in contact with the auxiliary positioning mechanism when being completely pushed into the machine tool workbench 01;

the auxiliary positioning mechanism can be a baffle plate, a stop block and the like and has a blocking effect;

and the auxiliary positioning mechanism can be installed inside the zero base plate 700, the zero pull plate 900, the machine tool workbench 01 or the CNC machine 00.

In one embodiment, the piston 800 includes: the pushing part 810, the pushing rod 820, the piston cover plate 830 and the spring 840, the pushing part 810 and the pushing rod 820 are fixedly connected;

the pushing part 810 is matched with the shape of the installation cavity 710, and a sealing ring 811 is arranged between the pushing part 810 and the inner wall of the installation cavity 710;

the piston cover plate 830 is sleeved at the pushing rod 820 and the piston cover plate 830 is fixed in the mounting cavity 710; the piston cover 830 has a ring shape, and the push rod 820 may be pushed out from the center of the piston cover 830 and locked with the zero point pulling plate 900 by a screw.

The spring 840 is connected between the pushing part 810 and the piston cover 830 and provides a relatively distant elastic force therebetween.

Specifically, the installation cavity 710 is formed in a cylindrical shape, the pushing portion 810 is formed in a disc shape, the pushing lever 820 is disposed at a central position of the pushing portion 810, and the pushing lever 820 may be integrally formed with the pushing portion 810 or fixedly connected thereto; and the piston cover plate 830 is annularly arranged and sleeved on the push rod 820.

The plurality of springs 840 are arranged around the pushing rod 820 in a circumferential arrangement, and the upper surface of the pushing part 810 and the lower surface of the piston cover 830 are respectively provided with a groove 801 for the insertion and installation of the springs 840.

A sealing ring is also arranged between the pushing rod 820 and the piston cover plate 830 to prevent air leakage from the center of the piston cover plate 830;

further, the air hole includes: the first air hole 711 is formed in the inner bottom wall of the installation cavity 710, when the air blowing device blows air through the first air hole 711, the air cannot leak under the action of the first sealing ring 811, so that the air pressure between the inner bottom wall of the installation cavity 710 and the lower surface of the pushing part 810 is increased, the pushing part 810 is driven to move upwards in the installation cavity 710, and the pushing rod 820 moves upwards to push the zero-point pulling plate 900 to move upwards;

after the first air hole 711 is disconnected, the zero-point pulling plate 900 moves downwards under the gravity of the self weight and the gravity of the clamp tray 300, and the pushing part 810 moves downwards, so that the zero-point pulling plate 900 pulls down and locks the clamp tray 300;

in addition, the spring 840 is compressed after the pushing part 810 moves up in the installation cavity 710, and thus, after the first air hole 711 is air-broken, the spring 840 provides a downward force, that is, a downward pulling force pulls the pushing part 810 downward, that is, pulls the zero pull plate 900 downward.

Further, the air hole further comprises: a second air hole 712; the second air hole 712 is formed in the inner side wall of the mounting cavity 710 and is located between the pushing portion 810 and the piston cover 830;

in use, the first air hole 711 is disconnected, the second air hole 712 is simultaneously accessed, the air pressure between the pushing part 810 and the piston cover plate 830 is increased, the piston cover plate 830 is fixed, the air pressure drives the pushing part 810 to move downwards, and the zero point pulling plate 900 is pulled to move downwards and lock the clamp tray 300 by being pulled downwards due to the fact that the zero point pulling plate 900 is locked with the pushing rod 820 through the screw.

As shown in fig. 8, in the CNC machine 00, the zero point positioning mechanism in the CNC machine is used in combination with a multi-station CNC feeding mechanism, the multi-station CNC feeding mechanism has a first reloading rail 100 and a second reloading rail 200, and the second reloading rail 200 is movable to a first position in line with the first reloading rail 100 and to a second position out of line with the first reloading rail 100; when the second reloading rail 200 moves to the first position, the clamp tray 300 can move along the first reloading rail 100 and the second reloading rail 200 to push in and install on the machine tool table 01 or pull out from the machine tool table 01;

then, in the process of pushing or pulling the clamp pallet 300 out of the machine tool table 01, the zero point pulling plate 900 needs to be pushed up by the piston 800, so that the zero point pulling plate 900 corresponds to the clamp pallet 300 in position, in the process of pushing the clamp pallet 300 into the machine tool table 01, the zero point pulling plate 900 can be embedded into the space between the two limiting blocks 320 of the clamp pallet 300, and in the process of pulling the clamp pallet 300 out of the machine tool table 01, the clamp pallet 300 can be smoothly pushed to the first heavy load guide rail 100 and moved to the second heavy load guide rail 200 along the first heavy load guide rail 100; otherwise, if the piston 800 does not push the zero point pulling plate 900 to move upwards, when the clamp tray 300 is pushed into the machine tool workbench 01, the clamp tray 300 and the zero point pulling plate 900 are in contact with each other, so that the clamp tray 300 cannot be pushed in smoothly, and when the clamp tray 300 is pulled out of the machine tool workbench 01, the clamp tray 300 and the first heavy-duty guide rail 100 are in contact with each other, so that the clamp tray cannot be pulled out smoothly;

after the clamp tray 300 is pushed into the machine tool workbench 01 from the first heavy-duty guide rail 100, the piston 800 pulls the zero-point pulling plate 900 to move downwards, and the zero-point pulling plate 900 drives the clamp tray 300 to move downwards and lock.

Through this CNC quick-witted zero point positioning mechanism, can realize anchor clamps tray 300 and change the back quick location and lock.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1.zero point positioning mechanism in CNC machine installs in the lathe workstation department of CNC machine, its characterized in that: comprising the following steps:

the zero base plate is arranged at the working table of the machine tool, a plurality of mounting cavities are arranged on the zero base plate, and air holes communicated with the air channels are arranged in the mounting cavities; the piston is arranged in the mounting cavity of the zero substrate, and the air channel blows air into the mounting cavity through the air hole to drive the piston to move up and down in the mounting cavity;

the zero pulling plate is arranged above the zero base plate in a limiting way and is driven to move up and down by a piston;

2. The CNC machine zero point positioning mechanism according to claim 1, wherein: after the clamp tray is pushed into the machine tool workbench, the clamp tray and the zero pulling plate are at least limited in the longitudinal direction.

3. The CNC machine zero point positioning mechanism according to claim 2, wherein: the jig tray includes: the support plate and the limiting blocks are symmetrically arranged on two sides of the lower surface of the support plate, and a space for embedding the zero pull plate is formed between the two limiting blocks; when the clamp tray is pushed into the machine tool workbench, the zero pull plate is correspondingly embedded into the space between the two limiting blocks, so that the clamp tray and the zero pull plate are limited in the horizontal direction.

4. The CNC machine zero point positioning mechanism according to claim 3, wherein: the corresponding side surfaces of the two limiting blocks are provided with a first clamping surface and a second clamping surface which are in a step shape; the two sides of the zero-point pulling plate are provided with a third clamping surface and a fourth clamping surface which are reverse-step-shaped, so that the clamp tray and the zero-point pulling plate are limited in the longitudinal direction;

the side that two stopper deviate from mutually is provided with the protection baffle, and the protection baffle shelters from the clearance between stopper and the zero point base plate.

5. The CNC machine zero point positioning mechanism according to claim 2, wherein: further comprises: an auxiliary rolling member;

6. The CNC machine zero point positioning mechanism according to claim 2, wherein: further comprises: an auxiliary positioning mechanism;

7. The CNC machine zero point positioning mechanism according to any one of claims 1 to 6, wherein: the piston includes: the pushing part, the pushing rod, the piston cover plate and the spring are fixedly connected;

8. The CNC machine zero point positioning mechanism according to claim 7, wherein: the air hole includes: the first air hole is arranged on the inner bottom wall of the mounting cavity.

9. The CNC machine zero point positioning mechanism according to claim 8, wherein: the air hole further comprises: a second air hole; the second air hole is formed in the inner side wall of the mounting cavity and is positioned between the pushing part and the piston cover plate.

10. The CNC machine zero point positioning mechanism according to claim 7, wherein: further comprises: a guide member;