阅读说明：本技术 点胶针头的校准方法 (Calibration method of dispensing needle head ) 是由 王静 周自强 于 2020-05-20 设计创作，主要内容包括：本申请提供一种点胶针头的校准方法,包括以下步骤：获取点胶机上原始点胶针头于预定点胶路径上的点胶位置；获取所述原始点胶针头的第一对针位置；当将所述原始点胶针头更换为当前点胶针头时,获取所述当前点胶针头的第二对针位置；以及根据所述第二对针位置和所述第一对针位置的差值,控制所述点胶机移动所述当前点胶针头至所述点胶位置。(The application provides a calibration method of a dispensing needle head, which comprises the following steps: obtaining the dispensing position of an original dispensing needle head on a dispensing machine on a preset dispensing path; acquiring a first needle aligning position of the original dispensing needle head; when the original dispensing needle head is replaced by the current dispensing needle head, acquiring a second needle aligning position of the current dispensing needle head; and controlling the dispenser to move the current dispensing needle head to the dispensing position according to the difference value between the second needle aligning position and the first needle aligning position.)

1. A calibration method of a dispensing needle head is characterized by comprising the following steps:

obtaining the dispensing position of an original dispensing needle head on a dispensing machine on a preset dispensing path;

acquiring a first needle aligning position of the original dispensing needle head;

when the original dispensing needle head is replaced by the current dispensing needle head, acquiring a second needle aligning position of the current dispensing needle head; and

and controlling the dispenser to move the current dispensing needle head to the dispensing position according to the difference value between the second needle aligning position and the first needle aligning position.

2. The method for calibrating a dispensing needle of claim 1, wherein obtaining the first needle alignment position comprises:

transmitting a first optical signal in a first horizontal direction by a first sensor and a second optical signal in a second horizontal direction by a second sensor, wherein the second horizontal direction is perpendicular to the first horizontal direction;

controlling the dispensing machine to move the original dispensing needle head along the first horizontal direction or the second horizontal direction from a preset reference position;

when the first sensor receives a first feedback signal formed by reflecting the first optical signal by the original dispensing needle head, or when the second sensor receives a second feedback signal formed by reflecting the second optical signal by the original dispensing needle head, the dispenser is controlled to move the original dispensing needle head upwards according to a first preset distance each time along a vertical direction perpendicular to the first horizontal direction and the second horizontal direction; and

and when the first sensor stops receiving the first feedback signal or the second sensor stops receiving the second feedback signal, determining a first vertical coordinate of the original dispensing needle in the vertical direction by combining the preset reference position and the product of the moving times of the original dispensing needle in the vertical direction and the first preset distance.

3. The method of calibrating a dispensing needle of claim 2, wherein obtaining the first needle pairing position comprises the further steps of:

controlling the dispenser to move the original dispensing needle upwards by a second preset distance from the preset reference position, wherein the second preset distance is smaller than the product of the moving times of the original dispensing needle in the vertical direction and the first preset distance;

controlling the dispenser to move the original dispensing needle head along the first horizontal direction; and

when the second sensor receives the second feedback signal, a first horizontal coordinate of the original dispensing needle head in the first horizontal direction is determined by combining the preset reference position and the moving distance of the original dispensing needle head along the first horizontal direction.

4. The method of calibrating a dispensing needle of claim 2,

controlling the dispenser to move the original dispensing needle upwards by a second preset distance from the preset reference position, wherein the second preset distance is smaller than the product of the moving times of the original dispensing needle in the vertical direction and the first preset distance;

controlling the dispenser to move the original dispensing needle head along the second horizontal direction; and

when the first sensor receives the first feedback signal, determining a second horizontal coordinate of the original dispensing needle head in the second horizontal direction by combining the predetermined reference position and the moving distance of the original dispensing needle head in the second horizontal direction, wherein the first horizontal coordinate, the second horizontal coordinate and the first vertical coordinate form the first needle aligning position.

5. The method for calibrating a dispensing needle of claim 1, wherein obtaining the second pair of needle positions comprises:

transmitting a third optical signal in a first horizontal direction by a first sensor and a fourth optical signal in a second horizontal direction by a second sensor, wherein the second horizontal direction is perpendicular to the first horizontal direction;

controlling the dispenser to move the current dispensing needle head from a preset reference position along the first horizontal direction or the second horizontal direction;

when the first sensor receives a third feedback signal formed by reflecting the third optical signal by the current dispensing needle head, or when the second sensor receives a fourth feedback signal formed by reflecting the fourth optical signal by the current dispensing needle head, the dispenser is controlled to move the current dispensing needle head upwards according to a first preset distance each time along a vertical direction perpendicular to the first horizontal direction and the second horizontal direction; and

and when the first sensor stops receiving the third feedback signal or the second sensor stops receiving the fourth feedback signal, determining a second vertical coordinate of the current dispensing needle head in the vertical direction by combining the preset reference position and the product of the moving times of the current dispensing needle head in the vertical direction and the first preset distance.

6. The method of calibrating a dispensing needle of claim 5, wherein obtaining the second pair of needle positions comprises the further steps of:

controlling the dispenser to move the current dispensing needle upwards by a second preset distance from the preset reference position, wherein the second preset distance is smaller than the product of the moving times of the current dispensing needle along the vertical direction and the first preset distance;

controlling the dispenser to move the current dispensing needle head along the first horizontal direction; and

when the second sensor receives the fourth feedback signal, a third horizontal coordinate of the current dispensing needle head in the first horizontal direction is determined by combining the preset reference position and the moving distance of the current dispensing needle head along the first horizontal direction.

7. The method of calibrating a dispensing needle of claim 5,

controlling the dispenser to move the current dispensing needle upwards by a second preset distance from the preset reference position, wherein the second preset distance is smaller than the product of the moving times of the current dispensing needle along the vertical direction and the first preset distance;

controlling the dispenser to move the current dispensing needle head along the second horizontal direction; and

when the first sensor receives the third feedback signal, a fourth horizontal coordinate of the current dispensing needle head in the second horizontal direction is determined by combining the preset reference position and the moving distance of the current dispensing needle head in the second horizontal direction, wherein the third horizontal coordinate, the fourth horizontal coordinate and the second vertical coordinate form the first needle aligning position.

8. The method of calibrating a dispensing needle of any of claims 2 to 7, wherein the first sensor and the second sensor are fiber optic sensors.

9. The method of calibrating a dispensing needle of claim 3 or 4, wherein the original dispensing needle is moved in the first horizontal direction or the second horizontal direction according to a predetermined speed.

Technical Field

The application relates to the technical field of dispensing, in particular to a calibration method of a dispensing needle head.

Background

A dispenser is a common injection molding device, and is used for dropping and coating fluid on the surface of a product or inside the product through a dispensing needle on the dispenser. The dispensing machine can change the flow of the colloid by replacing the specification of the dispensing needle head. Based on the diversity of some adhesive product types, need often to change different specifications and glue the syringe needle. However, the sizes of the dispensing needles with different specifications may be different, and if the dispensing needle is not installed in place during replacement, the latest working position of the needle point after each replacement of the dispensing needle will not be the same as that before the replacement, and therefore the working position of the dispensing needle after the replacement needs to be calibrated.

However, the existing calibration method needs expensive equipment and is high in cost.

Disclosure of Invention

In view of the above, the present application provides a calibration method that is advantageous for reducing the cost.

The application provides a calibration method of a dispensing needle head, which comprises the following steps: obtaining the dispensing position of an original dispensing needle head on a dispensing machine on a preset dispensing path; acquiring a first needle aligning position of the original dispensing needle head; when the original dispensing needle head is replaced by the current dispensing needle head, acquiring a second needle aligning position of the current dispensing needle head; and controlling the dispenser to move the current dispensing needle head to the dispensing position according to the difference value between the second needle aligning position and the first needle aligning position.

This application passes through first sensor and the second sensor acquires the counterpoint position of original point syringe needle and current point syringe needle respectively, controls according to the difference of the two to the counterpoint position the point gum machine carries out corresponding position compensation to current point syringe needle, thereby makes current point syringe needle gets back to and glues the position. The calibration device is simple in structure and low in cost, and the calibration method is simple in process.

Drawings

Fig. 1 is a schematic structural diagram of a calibration device for a dispensing needle according to an embodiment of the present disclosure.

Description of the main elements

Calibration device 100

Base 10

First mounting part 11

Second mounting part 12

First sensor 20

Second sensor 21

Original dispensing needle 30

Needle tip 31

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

To further explain the technical means and effects of the present application for achieving the intended purpose, the following detailed description is given to the present application in conjunction with the accompanying drawings and preferred embodiments.

Referring to fig. 1, the present application provides a calibration apparatus 100 for a dispensing needle (hereinafter referred to as calibration apparatus 100) for controlling a dispenser (not shown) to calibrate a position of a current dispensing needle when the dispensing needle is replaced with an original dispensing needle 30.

The calibration device 100 includes a base 10, a first sensor 20, and a second sensor 21. The base 10 includes a first mounting portion 11 and a second mounting portion 12 vertically connected to the first mounting portion 11, that is, the base 10 is substantially L-shaped. In the present embodiment, the first mounting portion 11 and the second mounting portion 12 are integrally formed.

The first sensor 20 and the second sensor 21 are mounted to the first mounting portion 11 and the second mounting portion 12, respectively. The first sensor 20 and the second sensor 21 may be fixed to the first mounting portion 11 and the second mounting portion 12 by a fastening member 13, and the fastening member 13 may be a nut. The first sensor 20 and the second sensor 21 can both emit optical signals, and the direction of the optical signal emitted by the first sensor 20 and the direction of the optical signal emitted by the second sensor 21 are on the same horizontal plane and perpendicular to each other. The first sensor 20 and the second sensor 21 can also receive a feedback signal formed by the optical signal reflected by the original dispensing needle 30 or the current dispensing needle.

In the present embodiment, the first sensor 20 and the second sensor 21 are optical fiber sensors.

The calibration device 100 further includes a processor (not shown) electrically connected to the first sensor 20 and the second sensor 21, and the processor is configured to control the dispenser to calibrate the position of the current dispensing needle according to whether the feedback signal is received by the first sensor 20 and the second sensor 21, so as to implement a calibration process of the dispensing needle.

The method for calibrating a dispensing needle according to an embodiment of the present application will be described in detail with reference to the calibration apparatus 100. The order of the steps of the calibration method may be changed and some steps may be omitted or combined according to different requirements. The calibration method comprises the following steps:

in step S1, the dispensing position of the original dispensing needle 30 on the predetermined dispensing path is obtained.

The dispenser is provided with a software program, and the software program can control the original dispensing needle 30 to perform dispensing operation along the predetermined dispensing path. When the original dispensing needle 30 is located at a dispensing position on the predetermined dispensing path, the dispensing position may be obtained first if the original dispensing needle 30 needs to be replaced.

Specifically, the calibration device 100 may further include a wireless communication unit (not shown) for communicating with the dispenser and acquiring the dispensing position. The wireless communication unit may be a bluetooth communication unit, an infrared communication unit, or a Wi-Fi communication unit. Of course, in other embodiments, the calibration device 100 may also be electrically connected to the dispenser and obtain the dispensing position.

The dispensing positions respectively comprise a first dispensing coordinate, a second dispensing coordinate and a third dispensing coordinate in a first horizontal direction, a second horizontal direction and a vertical direction. Establishing a three-dimensional coordinate system in the first horizontal direction, the second horizontal direction and the vertical direction, wherein the extending directions of an X axis, a Y axis and a Z axis of the three-dimensional coordinate system are respectively the first horizontal direction, the second horizontal direction and the vertical direction, so that the first dispensing coordinate, the second dispensing coordinate and the third dispensing coordinate are respectively marked as X for facilitating subsequent description₀、Y₀、Z₀Namely, the dispensing position can be marked as (X)₀，Y₀，Z₀)。

Step S2, obtain the first needle aligning position of the original dispensing needle 30.

Wherein the first stitch location includes a first horizontal coordinate, a second horizontal coordinate, and a first vertical coordinate along the first horizontal direction, the second horizontal direction, and the vertical direction, respectively. For convenience of subsequent description, the first horizontal coordinate, the second horizontal coordinate and the first vertical coordinate are respectively X₁、Y₁、Z₁That is, the first needle position may be noted as (X)₁，Y₁，Z₁)。

Since the needle may be deformed, the first horizontal coordinate and the second horizontal coordinate may be determined to cause a lower accuracy of the calibration. Thus, in this embodiment, the first vertical coordinate position is determined first, and then the first coordinate position and the second coordinate position are determined separately.

Determining the first vertical coordinate position specifically includes: first a first optical signal is emitted in a first horizontal direction by the first sensor 20 and a second optical signal is emitted in a second horizontal direction by the second sensor 21. Then, the dispenser is controlled to move the original dispensing needle 30 from a predetermined reference position along the first horizontal direction or the second horizontal direction, and when the first sensor 20 receives a first feedback signal formed by the first optical signal reflected by the original dispensing needle 30, or when the second sensor 21 receives a second feedback signal formed by the second optical signal reflected by the original dispensing needle 30, the dispenser is controlled to move the original dispensing needle 30 upward according to a first predetermined distance each time along a vertical direction perpendicular to the first horizontal direction and the second horizontal direction. When the first sensor 20 stops receiving the first feedback signal or the second sensor 21 stops receiving the second feedback signal, it indicates that the first optical signal and the second optical signal just can pass through the lower portion of the needle tip 31 of the original dispensing needle 30 without being reflected. Therefore, the first vertical coordinate of the original dispensing needle 30 in the vertical direction can be determined by combining the predetermined reference position and the product of the number of movements of the original dispensing needle 30 in the vertical direction and the first predetermined distance.

In this embodiment, the first predetermined distance is 0.01 mm. For example, the original dispensing needle 30 moves upward 20 times in the vertical direction, and each time the original dispensing needle 30 moves 0.01mm, the product of the number of times the original dispensing needle 30 moves in the vertical direction and the first predetermined distance is 2 mm. The first sensor 20 receives the first feedback signal when moving for the first time to the nineteenth time, and the first vertical coordinate position can be determined when the first sensor 20 stops receiving the first feedback signal when moving for the twentieth time.In particular, assuming that the predetermined reference position is (32, 66, -22), the first vertical coordinate Z is₁-20 (i.e., -22+ 2-20), the accuracy of the first vertical coordinate position is higher because the first predetermined distance is smaller. Of course, in other embodiments, the first predetermined distance may be set according to the accuracy requirement, and the present invention is not limited thereto.

At this time, the first horizontal coordinate of the original dispensing needle 30 in the first horizontal direction may be determined continuously. The method specifically comprises the following steps: and controlling the dispenser to move the original dispensing needle 30 upwards by a second predetermined distance from the predetermined reference position, wherein the second predetermined distance can be set according to the product of the moving times of the original dispensing needle 30 in the vertical direction and the first predetermined distance and the required precision. In the present application, the second predetermined distance is smaller than the product of the number of times the original dispensing needle 30 moves in the vertical direction and the first predetermined distance. For example, when the product of the number of movements of the original dispensing needle 30 in the vertical direction and the first predetermined distance is 2mm, the first predetermined distance may be set to 1.8 mm.

Then, the dispenser is controlled to move the original dispensing needle 30 along the first horizontal direction. When the second sensor 21 receives the second feedback signal, the first horizontal coordinate of the original dispensing needle 30 in the first horizontal direction is determined by combining the predetermined reference position and the moving distance of the original dispensing needle 30 in the first horizontal direction. In this embodiment, the original dispensing needle 30 moves along the first horizontal direction according to a predetermined speed, the predetermined speed may be 0.1mm/s to 0.3mm/s, and the moving distance of the original dispensing needle 30 along the first horizontal direction may be obtained according to a product of the predetermined speed and the moving time. Of course, in other embodiments, the predetermined speed may be set according to the accuracy requirement, and the present invention is not limited thereto.

The second predetermined distance is set to be smaller than the product of the moving times of the original dispensing needle 30 along the vertical direction and the first predetermined distance, so that when the original dispensing needle 30 moves along the first horizontal direction and the second sensor 21 receives the second feedback signal, the first horizontal coordinate determined to be the horizontal coordinate of the needle point 31 of the original dispensing needle 30 is obtained.

At this time, a second horizontal coordinate of the original dispensing needle 30 in the second horizontal direction may be determined in a manner similar to the determination of the first horizontal coordinate, specifically: and controlling the dispenser to move the original dispensing needle head 30 upwards by a second preset distance from the preset reference position, wherein the second preset distance is smaller than the product of the number of times of movement of the original dispensing needle head 30 in the vertical direction and the first preset distance.

Then, the dispenser is controlled to move the original dispensing needle 30 along the second horizontal direction. When the first sensor 20 receives the first feedback signal, a second horizontal coordinate of the original dispensing needle 30 in the second horizontal direction is determined by combining the predetermined reference position and the moving distance of the original dispensing needle 30 in the second horizontal direction. In the present embodiment, the original dispensing needle 30 moves along the second horizontal direction according to the predetermined speed, and the moving distance of the original dispensing needle 30 along the second horizontal direction can be obtained according to the product of the predetermined speed and the moving time.

Step S3, when the original dispensing needle 30 is replaced with the current dispensing needle, a second needle aligning position of the current dispensing needle is obtained.

In this embodiment, the method for obtaining the second needle position pair may be the same as the method for obtaining the first needle position pair, which is not described herein again. Wherein the third horizontal coordinate, the fourth horizontal coordinate, and the second vertical coordinate constitute the second needle pair position. For convenience of subsequent description, the third horizontal coordinate, the fourth horizontal coordinate and the second vertical coordinate are respectively recorded as X₂、Y₂、Z₂I.e. the second pair of needle positions can be noted as (X)₂，Y₂，Z₂)。

Step S4, controlling the dispenser to move the current dispensing needle to the dispensing position according to the difference between the second needle alignment position and the first needle alignment position.

In the present embodiment, a first difference between the third horizontal coordinate and the first horizontal coordinate, a second difference between the fourth horizontal coordinate and the second horizontal coordinate, and a third difference between the second vertical coordinate and the first vertical coordinate are calculated, respectively. And then, moving the current dispensing needle head according to the first difference, the second difference and the third difference respectively.

For example, assume the dispensing position (X)₀，Y₀，Z₀) Is (20, 30, -10), the first needle position (X)₁，Y₁，Z₁) Is (30, 60, -20), the second pair of needle positions (X)₂，Y₂，Z₂) Is (30, 60, -15), then, the first difference and the second difference are both 0, which indicates that the positions of the needle point 31 of the original dispensing needle 30 and the needle point of the current dispensing needle in the horizontal direction are consistent, and there is no difference in the needle aligning positions in the horizontal direction. However, the third difference value is +5, which indicates that the positions of the needle point 31 of the original dispensing needle and the needle point of the current dispensing needle are not consistent in the vertical direction, and therefore, the dispenser is controlled to move the current dispensing needle downwards in the vertical direction according to the third difference value, so as to compensate for the difference in the positions of the needle point of the current dispensing needle in the vertical direction compared with the needle point 31 of the original dispensing needle 30, and thus the needle point of the current dispensing needle can return to the dispensing position.

The dispensing position, the first needle aligning position and the second needle aligning position are coordinate positions of the needle point 31. Therefore, the needle point 31 is always located at the dispensing position before and after the current dispensing needle head is replaced.

This application passes through first sensor and the second sensor acquires the counterpoint position of original point syringe needle and current point syringe needle respectively, controls according to the difference of the two to the counterpoint position the point gum machine carries out corresponding position compensation to current point syringe needle, thereby makes current point syringe needle gets back to and glues the position. The calibration device is simple in structure and low in cost, and the calibration method is simple in process.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.