CN111360457B

CN111360457B - Method for eliminating height difference of product welding spot position

Info

Publication number: CN111360457B
Application number: CN202010225087.8A
Authority: CN
Inventors: 符式鹏; 徐海东
Original assignee: Shenzhen Intelligent Automation Equipment Co ltd
Current assignee: Shenzhen Intelligent Automation Equipment Co ltd
Priority date: 2020-03-26
Filing date: 2020-03-26
Publication date: 2022-03-22
Anticipated expiration: 2040-03-26
Also published as: CN111360457A

Abstract

The invention aims to provide a method for eliminating height difference of welding point positions of products in automatic welding. The invention comprises the following steps: A. firstly, aligning a welding coil with a calibration block to obtain a reference height; B. measuring the height difference between the welding spot and the reference height, and further obtaining the height difference between the welding spot and the upper end surface of the calibration block; C. calculating the Z-axis coordinate of the optimal welding position and moving the welding part of the welding ring to the Z-axis coordinate to weld the welding point; D. and D, repeating the step B and the step C to perform positioning welding on the rest welding points. The invention is applied to the technical field of automatic welding.

Description

Method for eliminating height difference of product welding spot position

Technical Field

The invention is applied to the technical field of automatic welding, and particularly relates to a method for eliminating height difference of welding point positions of products.

Background

A semi-finished capacitor module in an automobile part needs to connect a capacitor support and a capacitor through a welding process, a welding gap and a heating temperature are very important parameters for welding quality, and the semi-finished capacitor module is small in gap, fast to heat, large in gap and slow to heat. At present, manual welding is carried out basically by the experience of operators or technicians in production, and because the experience of workers is different, gaps between a welding coil and welding spots cannot be well controlled, stable welding cannot be carried out, so that a plurality of welding spots of a product are welded by the workers, the welding effect is different, and the appearance and the quality of the product are influenced. The camera detection process is generally available after the welding process, the appearance and the quality of the product cannot be guaranteed due to different experiences of workers and masters, the camera detection through rate is low, and the welding process cannot be reworked due to the automobile electric control product, so that the cost of the product is high. The manual welding has potential safety hazards such as scalding, and the manual welding is not only inefficient, can not prevent slow-witted, the uniformity is poor, welding quality can not obtain guaranteeing, and in addition one day gets off, the damage of people's finger is very serious, can also appear bad phenomena such as wrong welding because of fatigue, these all probably lead to the product disability rate to increase to influence production efficiency and increase in production cost.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a method for eliminating height difference of welding point positions of products in automatic welding.

The technical scheme adopted by the invention is as follows: the method is based on welding equipment comprising a three-axis moving mechanism, a welding wire ring, a laser range finder and a calibration block, wherein the welding wire ring and the laser range finder are fixed at the movable end of the three-axis moving mechanism, and the calibration block is fixed on a product clamp, and the method comprises the following steps:

A. the three-axis moving mechanism drives the welding ring to be in alignment contact with the upper end face of the calibration block, the laser range finder measures the distance L0 between the laser range finder and the upper end face of the calibration block, the Z-axis coordinate value of a light emitting point of the laser range finder is set as a distance measurement reference value Z0, the Z-axis coordinate value of the lower end face of the welding ring is set as Z1, and therefore the difference value between Z0 and Z1 is equal to L0;

B. then the three-axis moving mechanism drives the laser range finder to horizontally move to the position above a welding spot, the laser range finder measures the distance L1 between the welding spot of a product and a light emitting spot, the distance between the welding spot of the product and the upper end face of the calibration block is set to be L2, and L2 meets the formula L2= L1-L0;

C. setting a welding gap value required between the welding ring and a welding point during welding to be L3, setting a Z-axis coordinate of the lower end face of the welding ring during welding to be Z2, wherein Z2 meets a formula Z2= L0+ L2-L3, driving the welding ring to move above the welding point by the three-axis moving mechanism, and enabling the lower end face of the welding ring to descend to a position with the Z-axis coordinate of Z2, and then welding the welding point;

D. and D, after one-time welding is finished, repeating the step B and the step C to weld the rest welding points of the product until all welding points are welded.

As can be seen from the above, the initial position correction of the bonding coil is performed through step a, in which the L0 values measured by the bonding coils of different sizes are different, so that the L0 value needs to be re-measured after the bonding coil is replaced. And B, detecting a distance L1 between the welding point and the reference height by the laser range finder, and further acquiring the height difference between the welding point and the upper end surface of the calibration block, wherein the value of L2 can be positive or negative due to different positions of the welding point, the value of L2 is negative when the height of the welding point is higher than the upper end surface of the calibration block, and the value of L2 is positive when the height of the welding point is lower than the upper end surface of the calibration block. The three-axis moving mechanism drives the welding ring to move and keep at the height with the Z-axis coordinate of Z2, and further the height difference between the welding ring and the welding point is kept at the optimal welding gap value during welding.

In a preferred embodiment, the value of L3 is 0.3cm-0.5 cm.

According to the scheme, the gap between the welding ring and the welding point is between 0.3cm and 0.5cm, the welding effect is the best, and the welding ring is firm and reliable.

Drawings

FIG. 1 is a flow chart of the present invention;

fig. 2 is a schematic view of the welding apparatus.

Detailed Description

As shown in fig. 1, in the present embodiment, the present invention is based on a welding apparatus including a three-axis moving mechanism 1, a welding coil 2, a laser range finder 3, and a calibration block 4, wherein the welding coil 2 and the laser range finder 3 are both fixed to a movable end of the three-axis moving mechanism 1, and the calibration block 4 is fixed to a product clamp, and the method includes the following steps:

A. the three-axis moving mechanism 1 drives the welding coil 2 to be in alignment contact with the upper end face of the calibration block 4, the laser range finder 3 measures the distance L0 between the laser range finder and the upper end face of the calibration block 4, the Z-axis coordinate value of the light emitting point of the laser range finder 3 is set as a distance measurement reference value Z0, the Z-axis coordinate value of the lower end face of the welding coil 2 is set as Z1, and therefore the difference value between Z0 and Z1 is equal to L0;

B. then the three-axis moving mechanism 1 drives the laser range finder 3 to horizontally move to a position above a welding point, the laser range finder 3 measures a distance L1 between the welding point of a product and a light emitting point, the distance between the welding point of the product and the upper end face of the calibration block 4 is set to be L2, and L2 meets a formula L2= L1-L0;

C. setting a welding gap value required between the welding ring 2 and a welding point during welding to be L3, setting a Z-axis coordinate of the lower end face of the welding ring 2 during welding to be Z2, wherein Z2 meets a formula Z2= L0+ L2-L3, driving the welding ring 2 to move above the welding point by the three-axis moving mechanism 1, and enabling the lower end face of the welding ring 2 to descend to a position with the Z-axis coordinate of Z2, and then welding the welding point;

The value of L3 is 0.3cm-0.5 cm.

Claims

1. A method for eliminating height difference of product welding point positions is characterized in that the method is based on welding equipment comprising a three-axis moving mechanism (1), a welding coil (2), a laser range finder (3) and a calibration block (4), wherein the welding coil (2) and the laser range finder (3) are both fixed at the movable end of the three-axis moving mechanism (1), and the calibration block (4) is fixed on a product clamp, and the method comprises the following steps:

A. the three-axis moving mechanism (1) drives the welding wire ring (2) to be in alignment contact with the upper end face of the calibration block (4), the laser range finder (3) measures the distance L0 between the laser range finder and the upper end face of the calibration block (4), the Z-axis coordinate value of a light emitting point of the laser range finder (3) is set as a distance measurement reference value Z0, the Z-axis coordinate value of the lower end face of the welding wire ring (2) is set as Z1, and therefore the difference value between Z0 and Z1 is equal to L0;

B. then the three-axis moving mechanism (1) drives the laser range finder (3) to horizontally move to a position above a welding point, the laser range finder (3) measures a distance L1 between the welding point of a product and a light emitting point, the distance between the welding point of the product and the upper end face of the calibration block (4) is set to be L2, and L2 meets a formula L2= L1-L0;

C. setting a welding gap value required between the welding ring (2) and a welding point during welding to be L3, setting a Z-axis coordinate of the lower end face of the welding ring (2) during welding to be Z2, wherein Z2 meets a formula Z2= L0+ L2-L3, driving the welding ring (2) to move above the welding point by the three-axis moving mechanism (1), enabling the lower end face of the welding ring (2) to descend to a position with the Z-axis coordinate of Z2, and then welding the welding point, wherein the value of L3 is 0.3cm-0.5 cm;