CN214609716U

CN214609716U - Workpiece conveying device

Info

Publication number: CN214609716U
Application number: CN202120156421.9U
Authority: CN
Inventors: 潘玲玲; 覃楚; 廖凯
Original assignee: Shenzhen Leadwell Technology Co Ltd
Current assignee: Shenzhen Leadwell Technology Co Ltd
Priority date: 2021-01-20
Filing date: 2021-01-20
Publication date: 2021-11-05
Anticipated expiration: 2031-01-20

Abstract

The utility model is suitable for the die-casting field, and provides a workpiece conveying device, which comprises a conveying belt, wherein a plurality of positioning pieces for accommodating workpieces are arranged on the conveying belt, and the plurality of positioning pieces are arranged at intervals around a circumference; the rotary driving part is connected with the conveying belt and is used for driving the conveying belt to rotate; the lifting mechanism is arranged on one side of the conveying belt and comprises a servo motor, a linear module and an ejector rod connected with the linear module, the servo motor is used for driving the ejector rod to lift through the linear module, and the ejector rod can stretch into the positioning piece to eject a workpiece out of the positioning piece. The workpiece conveying device is high in control precision and conveying efficiency.

Description

Workpiece conveying device

Technical Field

The utility model relates to a die-casting field especially relates to a work piece conveyer.

Background

The insert conveying belt is an important part in the automatic die-casting production and is used for conveying inserts, and the timeliness and the accuracy of insert conveying play a decisive role in whether the die-casting unit can efficiently produce or not. At present, most of equipment for conveying inserts in the market is controlled by a frequency converter, and the control mode of the insert conveying belt mainly has the following problems: when the die-casting unit is automatically produced, the position of the insert can be deviated by an insert conveying belt controlled by a frequency converter, so that quick and accurate positioning cannot be achieved, and the insert conveying belt cannot be closely matched with a manipulator; secondly, the movement speed of the traditional insert conveying belt is slow, and the control is not stable.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a workpiece conveying device for conveying workpieces such as mold inserts to solve the above-mentioned problems.

An embodiment of the utility model provides a work piece conveyer, include:

the conveying belt is provided with a plurality of positioning pieces for accommodating workpieces, and the positioning pieces are arranged around a circumference at intervals;

the rotary driving part is connected with the conveying belt and is used for driving the conveying belt to rotate;

the lifting mechanism is arranged on one side of the conveying belt and comprises a servo motor, a linear module and an ejector rod connected with the linear module, the servo motor is used for driving the ejector rod to lift through the linear module, and the ejector rod can stretch into the positioning piece to eject a workpiece out of the positioning piece.

In one embodiment, the workpiece conveying device further comprises a manipulator, which is arranged adjacent to the lifting mechanism and is used for grabbing the workpiece ejected from the positioning piece.

In an embodiment, the workpiece conveying device further includes a first sensor, and the first sensor is configured to sense whether a workpiece is ejected from the positioning element, and send a material taking signal to the manipulator and a start-stop signal to the servo motor.

In one embodiment, a plurality of workpieces are stacked in each positioning element;

the original position of the ejector rod is positioned below the conveying belt; and under the driving of the servo motor, the ejector rod rises for a preset height every time according to the thickness of the workpiece, so that one workpiece is ejected out of the positioning piece.

In one embodiment, the conveyer belt is provided with M first stations and N second stations, the first stations and the second stations are alternately arranged at intervals, each of the first stations and each of the second stations are provided with one positioning element, and the positioning elements on the first stations and the second stations are respectively used for accommodating workpieces of different specifications;

wherein M, N are each an integer of 1 or more.

In an embodiment, the rotary driving member is configured to drive the conveying belt to rotate by a preset angle, so that the M first stations sequentially rotate to the lifting mechanism, or the N second stations sequentially rotate to the lifting mechanism.

In one embodiment, the rotary drive is a divider motor.

In one embodiment, the workpiece transfer apparatus further comprises a second sensor for sensing a number of rotations of the conveyor belt.

In an embodiment, the workpiece transfer device further comprises a PLC controller, and the PLC controller is in communication connection with the servo motor.

In one embodiment, the workpiece conveying device further comprises an HMI device for adjusting control parameters of the servo motor, the control parameters including at least one of a home position of the ejector pin, an ejection speed, an acceleration, a deceleration, and a workpiece thickness.

The workpiece conveying device adopts the servo motor to control the lifting of the ejector rod, and the control precision of the servo motor is higher, so that the ejector rod can eject workpieces to the same height every time, and the workpieces can be conveniently grabbed by the manipulator. Therefore, the workpiece conveying device can quickly and accurately position the workpiece, and the stop position of the workpiece is not easy to deviate, so that the workpiece conveying device is tightly matched with the manipulator. And, the rotary driving piece is used for driving the transmission band to rotate, and the moving speed of rotary driving piece is very fast and control is steady. The workpiece conveying device is high in control precision and conveying efficiency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a workpiece conveying apparatus according to an embodiment of the present invention;

FIG. 2 is a top view of the workpiece transport apparatus shown in FIG. 1;

fig. 3 is a block diagram of a PLC controller and an HMI device according to an embodiment of the present invention;

fig. 4 is an interface schematic diagram of an HMI device according to an embodiment of the present invention.

The designations in the figures mean:

100. a workpiece transfer device;

10. a conveyor belt; 11. a positioning member; 101. a first station; 102. a second station;

20. a rotary drive member;

30. a lifting mechanism; 31. a servo motor; 32. a linear module; 33. a top rod;

41. a first inductor; 42. a second inductor;

50. a PLC controller;

60. an HMI device;

71. a frame; 72. a case.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention will be further described in detail with reference to the accompanying drawings, which are examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", 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 do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, are not to be construed as limiting the patent. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.

To explain the technical solution of the present invention, the following description is made with reference to the specific drawings and examples.

The utility model provides a work piece conveyer for carry the work piece, in this embodiment, explain as the mold insert to the work piece.

Referring to fig. 1 and 2, the workpiece transfer apparatus 100 includes a conveyor belt 10, a rotary driving member 20, and a lifting mechanism 30. The conveying belt 10 is provided with a plurality of positioning pieces 11 for accommodating workpieces, and the positioning pieces 11 are arranged at intervals around a circumference; the rotary driving member 20 is connected to the conveyor belt 10 and is used for driving the conveyor belt 10 to rotate; the lifting mechanism 30 is disposed at one side of the conveyor belt 10, the lifting mechanism 30 includes a servo motor 31, a linear module 32 and a top rod 33 connected to the linear module 32, the servo motor 31 is used for driving the top rod 33 to lift through the linear module 32, and the top rod 33 can extend into the positioning member 11 to push the workpiece out of the positioning member 11.

The positioning element 11 is, for example, a sleeve, but is not limited thereto, and the positioning element 11 may also be a groove or other positioning structure; the linear module 32 can be a ball screw structure, and can drive the lift of the push rod 33 under the control of the servo motor 31. The servo motor 31 has higher control precision on the ejector rod 33, which can reach 0.1 mm.

When in use, a plurality of inserts are respectively placed into the positioning members 11 on the conveyer belt 10, and the rotary driving member 20 drives the conveyer belt 10 to rotate, so that one positioning member 11 moves to the lifting mechanism 30 along with the conveyer belt 10. The servo motor 31 controls the linear module 32 to move linearly, so as to control the lift of the top rod 33, and the top rod 33 extends into the positioning member 11 from the lower part of the conveyer belt 10, so as to eject one insert out of the positioning member 11. Then, a grabbing mechanism such as a manipulator can grab one insert on the uppermost layer, and the insert is placed into a die-casting die for die-casting.

When a plurality of inserts are stacked in the positioning part 11, after the manipulator grabs one insert, the servo motor 31 can drive the ejector rod 33 to ascend again so as to eject one insert again; repeating the above operations until the insert in the positioning member 11 is completely grabbed, and then, the conveyer belt 10 is driven by the rotary driving member 20 to rotate again by a preset angle, so that the next positioning member 11 moves to the lifting mechanism 30; all the inserts in the positioning member 11 can be loaded by this circulation. The workpiece conveying device 100 adopts the servo motor 31 to control the lifting of the ejector rod 33, and the control precision of the servo motor 31 is high, so that the ejector rod 33 can eject workpieces to the same height every time, and a manipulator can conveniently grab the workpieces. Therefore, the workpiece conveying device 100 can quickly and accurately position the workpiece, and the stop position of the workpiece is not easy to deviate, so as to realize close fit with the manipulator. Moreover, the rotary driving member 20 is used for driving the transmission belt to rotate, and the movement speed of the rotary driving member 20 is fast and the control is smooth. The workpiece transfer apparatus 100 described above has high control accuracy and high conveyance efficiency.

In one embodiment, the workpiece transfer apparatus 100 includes a robot (not shown) disposed adjacent to the lift mechanism 30 for grasping the workpiece ejected from the nest 11. It is understood that the robot may be replaced by other grabbing mechanisms as long as the robot can be tightly fitted with the lifting mechanism 30.

The workpiece conveying device 100 further comprises a first sensor 41, wherein the first sensor 41 is used for sensing whether the workpiece is ejected from the positioning element 11, and sending a material taking signal to the manipulator and a start-stop signal to the servo motor 31. The first sensor 41 may be a photoelectric switch, and is fixed above the conveyer 10 by a support rod. When the workpiece is ejected by the ejector rod 33, the first sensor 41 can sense the workpiece and send a material taking signal to the manipulator, and the manipulator starts a grabbing action; when the first sensor 41 senses that there is no workpiece above the positioning member 11, the first sensor 41 sends a start-stop signal to the servo motor 31, and the servo motor 31 drives the push rod 33 to ascend again to push the next workpiece out of the positioning member 11.

In one embodiment, a plurality of workpieces are stacked in each positioning member 11; the original position of the mandril 33 is positioned below the conveyer belt 10; under the driving of the servo motor 31, the ejector rod 33 is lifted by a preset height each time according to the thickness of the workpiece, so that one workpiece is ejected from the positioning piece 11.

Because a plurality of workpieces are stacked in the positioning part 11, more workpieces are transported by the workpiece conveying device 100, and the production efficiency is improved. For example, 10 to 20 workpieces are stacked in each positioning member 11. It will be appreciated that the number of workpieces in the locating member 11 may be set as desired. As shown in fig. 1, the home position of the jack 33 is located below the conveyor belt 10. When one positioning piece 11 moves to the position above the lifting mechanism 30, the ejector rod 33 rises for the first time by a preset height, so that the uppermost workpiece is ejected; then, the lift pins 33 are raised by a height equal to the thickness of the workpiece each time, so that the lift pins 33 lift out the workpiece one at a time, so that the robot can grasp the workpiece. After all the workpieces are ejected out of the positioning member 11, the ejector rod 33 is located at the limiting point, and then the ejector rod 33 is reset to the original position from the limiting point.

In an embodiment, the conveyor belt 10 is provided with M first stations 101 and N second stations 102, the first stations 101 and the second stations 102 are alternately arranged at intervals, each first station 101 and each second station 102 are provided with a positioning element 11, and the positioning elements 11 on the first stations 101 and the second workpieces are respectively used for accommodating workpieces of different specifications; wherein M, N are each an integer of 1 or more.

Therefore, the conveying belt 10 can convey workpieces of two specifications, and the practicability is improved. It is understood that the size of the positioning member 11 may be matched with the size of the workpiece, so that a plurality of workpieces may be stacked in the height direction of the positioning member 11.

The rotary driving member 20 is used for driving the conveyor belt 10 to rotate by a preset angle, so that the M first stations 101 sequentially rotate to the lifting mechanism 30, or the N second stations 102 sequentially rotate to the lifting mechanism 30.

In this embodiment, M, N are all 6, that is, there are 6 first stations 101 and 6 stations on the transportation, and the rotary driving member 20 drives the conveyer belt 10 to rotate the angle of two work pieces at a time, that is, rotate 60 degrees, so that 6 first stations 101 rotate to the lifting mechanism 30 in turn to carry out loading, and then, 6 second stations 102 rotate to the lifting mechanism 30 in turn to carry out loading.

It is understood that M, N may be equal or different and M, N may be set as desired, e.g., 4 or 8 each. When M, N is adjusted, the drive angle of the rotary drive 20 is adjusted accordingly.

The rotary drive 20 is a decollator motor that can precisely control the rotation angle of the belt 10.

It is understood that in other embodiments, all of the positioning members 11 on the conveyor belt 10 may be used for placing the same workpiece, or more than two workpieces, but are not limited thereto. When all the positioning members 11 are used for placing the same workpiece, the rotary driving member 20 drives the conveyer 10 to rotate one station at a time.

Optionally, the workpiece transfer device 100 further includes a second sensor 42, the second sensor 42 being configured to sense a number of rotations of the conveyor belt 10. The second sensor 42 may count the revolutions of the conveyor belt 10, with the second sensor 42 counting 1 time per revolution of the conveyor belt 10. For example, the second sensor 42 counts 1 time for two station rotations of the belt 10; when the counting reaches M times or N times, the second sensor 42 sends out a feeding reminding signal.

Referring to fig. 1 to 4, in an embodiment, the workpiece conveying apparatus 100 further includes a PLC controller 50, and the PLC controller 50 is in communication connection with the servo motor 31.

Optionally, a profinet communication mode is used between the servo motor 31 and the PLC 50, so that the wiring is simple and the maintenance is convenient. For example, the PLC controller 50 is connected to the servo motor 31 through an RJ45 interface cable.

In one embodiment, the workpiece transfer apparatus 100 further includes an HMI device 60, the HMI device 60 being configured to adjust a control parameter of the servo motor 31, the control parameter including at least one of a home position of the ejector 33, an ejection speed, an acceleration, a deceleration, and a thickness of the workpiece.

The PLC controller 50 is communicatively coupled to the HMI device 60. It is understood that the PLC controller 50 is also communicatively connected to the rotary driving member 20, the first sensor 41, the second sensor 42, and so on, for controlling.

FIG. 4 is an interface diagram of an HMI apparatus 60 in one embodiment. The HMI device 60 can control and display control parameters of the servo motor 31, thereby facilitating control of the servo motor 31. In the present embodiment, the control parameters include insert thickness, velocity, acceleration, deceleration, etc., and the interface diagram is merely an example and not limited thereto.

In one embodiment, the workpiece conveying device 100 further includes a frame 71 and a cabinet 72 disposed on the frame 71, the conveyor belt 10 is disposed above the frame 71, and the rotary driving member 20 is disposed below the frame 71; control elements such as the PLC controller 50 may be housed in the cabinet 72.

In one embodiment, the workpiece transfer apparatus 100 is used to transport inserts, and the control process is as follows.

In an initial state, the plunger 33 is in the home position. The rotary driving member 20 drives the conveyer belt 10 to rotate, and when a positioning member 11 moves and stays at the lifting mechanism 30, the servo motor 31 controls the ejector rod 33 to ascend, and the ejector rod 33 penetrates into the positioning member 11 and ejects an insert. The first sensor 41 senses the insert and sends a pick-up signal to the robot, which takes the insert away. The ejector rod 33 ascends again to eject the next insert, the manipulator fetches the insert again, and the steps are repeated until all the inserts in the positioning part 11 are fetched, and the ejector rod 33 descends to the original position.

Then, the rotary driving member 20 drives the conveyer belt 10 to rotate again, another positioning member 11 moves and stops at the lifting mechanism 30, and the above-mentioned jacking and material taking actions are repeated until all the inserts in the positioning member 11 are taken away.

When the second sensor 42 senses the rotation of the rotary conveyer 10 for a preset number of times, the manual feeding into the positioning member 11 is prompted.

The workpiece conveying device 100 controls the conveying belt 10 through the rotary driving part 20, the conveying belt 10 can accurately position the positioning part 11, the movement speed of the rotary driving part 20 is high and stable to control, and the movement speed of the conveying belt 10 can reach 3000 revolutions per minute; the workpiece conveying device 100 controls the ejector rods 33 through the servo motor 31, so that the height of the workpiece can be accurately positioned, a manipulator can conveniently and accurately grab the workpiece, and the workpiece is prevented from being deviated in the stop position, and therefore, the workpiece conveying device 100 can quickly and accurately position the workpiece; the conveyor belt 10 can convey a relatively large number of workpieces, for example, 20 workpieces per station of rotation. The servo motor 31 of the workpiece conveying device 100 and the PLC 50 use a profinet communication mode, so that the wiring is simple and the maintenance is convenient.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims

1. A workpiece conveying apparatus, comprising:

2. The workpiece transport apparatus of claim 1, further comprising a robot disposed adjacent to the elevator mechanism for grasping a workpiece ejected from the nest.

3. The workpiece conveying device according to claim 2, further comprising a first sensor for sensing whether a workpiece is ejected from the positioning member, and sending a material taking signal to the robot and a start/stop signal to the servo motor.

4. The workpiece transport apparatus of claim 1, wherein a plurality of workpieces are stacked within each of the nests;

5. The workpiece conveying device according to claim 1, wherein the conveyor belt is provided with M first stations and N second stations, the first stations and the second stations are alternately arranged at intervals, each of the first stations and each of the second stations are provided with one of the positioning members, and the positioning members on the first stations and the second stations are respectively used for accommodating workpieces of different specifications;

wherein M, N are each an integer of 1 or more.

6. The workpiece conveying apparatus of claim 5, wherein the rotary driving member is configured to drive the conveyor belt to rotate by a predetermined angle, so that M first stations are sequentially rotated to the lifting mechanism, or N second stations are sequentially rotated to the lifting mechanism.

7. The workpiece transport apparatus of claim 1, wherein the rotary drive is a indexer motor.

8. The workpiece transfer device of claim 1, further comprising a second sensor for sensing a number of rotations of the conveyor belt.

9. The workpiece transport apparatus of any of claims 1-8, further comprising a PLC controller communicatively coupled to the servo motor.

10. The workpiece transport apparatus of claim 9, further comprising an HMI device for adjusting control parameters of the servo motor, the control parameters including at least one of a home position of the ram, a ram ejection speed, an acceleration, a deceleration, and a workpiece thickness.