CN209954027U

CN209954027U - Automatic sensing clamping mechanism for sensor pins

Info

Publication number: CN209954027U
Application number: CN201920228633.6U
Authority: CN
Inventors: 蔡卫民
Original assignee: SUZHOU LINKTRON ELECTRONIC SYSTEM CO Ltd
Current assignee: SUZHOU LINKTRON ELECTRONIC SYSTEM CO Ltd
Priority date: 2019-02-21
Filing date: 2019-02-21
Publication date: 2020-01-17
Anticipated expiration: 2029-02-21

Abstract

The utility model discloses an automatic sensing clamping mechanism for a sensor pin, which comprises a positioning head arranged along the transverse axis direction of a revolving shaft, wherein two sides of the positioning head are provided with chucks for clamping a matched workpiece; the tool clamp is driven by a power source; a limiting plate which can be inserted into the positioning head and can realize the alignment and positioning of the end part of the clamped end of the workpiece is also arranged on the side surface of the tool clamp; the limiting plate is driven by the displacement assembly to realize the linear motion of the limiting plate along the axial or radial feeding of the workpiece; a visual camera arranged on one side of the tool clamp carries out picture positioning on the welding position of a workpiece on the tool clamp; the positioning head is provided with a matching hole penetrating through the positioning head along the radial direction of the positioning head, and the front end surface of the positioning head is provided with a mounting hole communicated with the matching hole; the upper end of the limiting plate is inserted into the matching hole; and the limiting plate is also provided with an elastic trigger switch for determining the workpiece to be clamped to the machining position. The structure is based on visual positioning detection, and ensures the welding quality by combining the limiting triggering condition in the clamping process.

Description

Automatic sensing clamping mechanism for sensor pins

Technical Field

The utility model relates to a sensor pin welding equipment field, especially sensor pin automatic sensing fixture.

Background

Sensors are used in an increasing amount as important electronic components. Especially high end performance sensors are becoming more and more promising in the market, and the production of sensors requires the correct soldering of pins to the sensor base or the corresponding end. In the process, a series of processing is carried out on the pins, defective products with polarity defects are screened and removed, and finally, the sizes such as welding height, distance and the like are ensured to meet the specification. The prior art is divided into multiple steps and work, cannot realize automatic production and has low production efficiency.

When the pin is welded, a product needs to be placed or fixed on the workbench through the tool fixture, and then the tool fixture is placed on the welding platform. However, the fixture is difficult to ensure accurate positioning of a product in the clamping process, or the clamping force is unstable and damages a workpiece, so that the fixture is difficult to match with various sensor leads. Moreover, the tool is troublesome to replace, and the risk that the tool clamp damages or smashes workers exists, so that a large working space is occupied.

SUMMERY OF THE UTILITY MODEL

The technical scheme of the utility model is that: the positioning device comprises a positioning head, a rotating shaft of which is arranged along the transverse axial direction, and clamping heads which are matched with the positioning head to clamp workpieces are arranged on two sides of the positioning head; the tool clamp is driven by a power source; a limiting plate which can be inserted into the positioning head and can realize the alignment and positioning of the end part of the clamped end of the workpiece is also arranged on the side surface of the tool clamp; the limiting plate is driven by the displacement assembly to realize the linear motion of the limiting plate along the axial or radial feeding of the workpiece; a visual camera arranged on one side of the tool clamp carries out picture positioning calibration on the welding position of a workpiece on the tool clamp; the positioning head is provided with a matching hole penetrating through the positioning head along the radial direction of the positioning head, and the front end surface of the positioning head is provided with a mounting hole communicated with the matching hole; the upper end of the limiting plate is inserted into the matching hole; and the limiting plate is also provided with an elastic trigger switch for determining the workpiece to be clamped to the machining position.

Preferably, the tooling fixture comprises a turntable; the chuck is arranged on the front surface of the turntable through the pneumatic base, and the clamping center of the chuck is superposed with the axis of the turntable; the tail end of the positioning head is connected to the turntable; the back of the rotary table is linked to the motor through a transmission shaft.

Preferably, the displacement assembly comprises an X-direction unit and a Z-direction unit; the X-direction unit comprises a first linear module moving along the axial direction of the clamped workpiece; the Z-direction unit comprises a second linear module which is based on the symmetrical center of the vertical axis of the clamped workpiece and moves along the radial direction of the clamped workpiece; the limiting plate is pushed by the X-direction unit, and the X-direction unit is pushed by the Z-direction unit.

Preferably, the side of the tool clamp is further provided with a plurality of sensing heads for detecting the clamping state of the workpiece.

Preferably, the vision camera is matched with the laser welding device, and the vision camera detects the position precision of the focus point and the welding point of the laser beam passing through the annular light source.

The utility model has the advantages that:

1. by utilizing the rotating disc type movement mode and based on two clamping effects of end part insertion and clamping, more stable workpiece positioning and rotation can be achieved, and not only is workpiece clamping convenient, but also the stability of the welding process can be ensured.

2. Based on visual positioning detection and in combination with a limiting trigger condition in the clamping process, welding is started after a plurality of detection conditions are met, and welding quality is ensured.

Drawings

The invention will be further described with reference to the following drawings and examples:

FIG. 1 is a block diagram of a sensor pin auto-sensing fixture;

FIG. 2 is an enlarged view of the structure of region A in FIG. 1;

FIG. 3 is a block diagram of the cooperation with a laser welder;

FIG. 4 is a top view of a portion of the structure engaged with a laser welder;

wherein: 1. positioning the head; 2. a chuck; 3. a turntable; 4. a pneumatic base; 5. a motor; 6. a limiting plate; 7. a vision camera; 8. a laser generating unit; 9. an annular light source; 10. a sensor head; 11. a first cylinder; 12. a right-angle seat plate; 13. a second cylinder; 14. a second track.

Detailed Description

Example (b):

as shown in fig. 1-4, the sensor pins automatically sense the clamping mechanism, and the workpiece needs to be clamped transversely, so that the workpiece can have a transverse and axial rotational degree of freedom. Therefore, the tool clamp comprises a positioning head 1, wherein the rotary shaft is arranged along the transverse axial direction, two sides of the positioning head 1 are provided with chucks 2 which are matched with the positioning head to clamp workpieces, the tool clamp is driven by a power source, and a sensing head 10 is arranged on the side surface of a clamping position and used for clamping and detecting the workpieces, so that the workpieces are clamped on the tool clamp.

As shown in the figures 2 and 4, the tool clamp comprises a rotary table 3, a positioning head 1 and a chuck 2, the chuck 2 is installed on the front surface of the rotary table 3 through a pneumatic base 4, the clamping center of the chuck 2 coincides with the axis of the rotary table 3, and the pneumatic base 4 provides clamping force for the chuck 2. The end of the positioning head 1 is connected to the rotary table 3, the back of the rotary table 3 is provided with a coupling component, and the coupling component is linked to the motor 5 on the lower side of the coupling component through a transmission belt. The positioning head 1 is provided with a matching hole penetrating through the positioning head along the radial direction, the front end face of the positioning head 1 is provided with a mounting hole communicated with the matching hole, and one end of a workpiece is inserted into the mounting hole to be mounted and positioned. Simultaneously, the positioning head 1 is matched with a limiting plate 6, the upper end of the limiting plate 6 is inserted into the matching hole, and the front end of the workpiece is inserted into the mounting hole and is propped against the upper end of the limiting plate 6. Meanwhile, an elastic trigger switch is arranged at the lower end of the limiting plate and is triggered according to the jacking force of the workpiece on the limiting plate 6, so that the workpiece is ensured to be welded after being clamped to the correct position.

The work fixture drives the workpiece to rotate, so that the laser must act on the joint of the workpiece to weld along with the rotation of the workpiece. The laser ray emitted by the laser welding head at one side of the tool clamp is focused on the rotating surface of the product outside the chuck 2. The laser welder comprises on the same optical axis: the device comprises a vision camera 7, a laser generating unit 8 and an annular light source 9, wherein the vision camera 7 is used for carrying out position calibration detection on a focusing point and a welding point of a laser beam passing through the annular light source 9. Meanwhile, a focusing table for adjusting focal power of the regulator is also arranged on the laser generating unit 8. The vision camera 7 calibrates the welding position, and only when the signal feedback of the vision camera 7, the feedback of the trigger switch on the limiting plate and the feedback of the sensing head 10 are synchronous, the welding process can be formally started, so that the welding quality is further improved.

The limiting plate arranged on the side face of the tool clamp is driven by the displacement assembly to realize the linear motion of the limiting plate along the axial direction or the radial direction of the workpiece. The displacement assembly comprises an X-direction unit and a Z-direction unit, wherein the X-direction unit comprises a first linear module moving along the axial direction of the clamped workpiece. The first linear module comprises a first air cylinder 11 which is pushed and pulled along the first rail in a linear mode, the first air cylinder is directly matched on the first rail, and the first rail is fixed on a right-angle seat plate 12. The Z-direction unit comprises a second linear module which is based on the symmetrical center of the vertical axis of the clamped workpiece and moves along the radial direction of the clamped workpiece, the second linear module comprises a second air cylinder 13 which is linearly pushed and pulled along a second rail 14, and the right-angle seat plate 12 is matched on the second rail 14. Therefore, the stopper plate 6 is pushed by the X-direction unit, and the X-direction unit is pushed by the Z-direction unit.

In order to ensure the accuracy of the clamping in place and the welding position of the workpiece, a plurality of sensing heads 10 for detecting the clamping state of the workpiece are arranged on the side surface of the tool clamp. The sensing head 10 further detects different positions of the workpiece, and ensures that the workpiece to be welded is clamped on the tool fixture.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical concepts of the present invention be covered by the claims of the present invention.

Claims

1. Sensor pin automatic sensing fixture, its characterized in that: the positioning device comprises a positioning head, a rotating shaft of which is arranged along the transverse axial direction, and clamping heads which are matched with the positioning head to clamp workpieces are arranged on two sides of the positioning head; the tool clamp is driven by a power source; a limiting plate which can be inserted into the positioning head and can realize the alignment and positioning of the end part of the clamped end of the workpiece is also arranged on the side surface of the tool clamp; the limiting plate is driven by the displacement assembly to realize the linear motion of the limiting plate along the axial or radial feeding of the workpiece; a visual camera arranged on one side of the tool clamp carries out picture positioning calibration on the welding position of a workpiece on the tool clamp; the positioning head is provided with a matching hole penetrating through the positioning head along the radial direction of the positioning head, and the front end surface of the positioning head is provided with a mounting hole communicated with the matching hole; the upper end of the limiting plate is inserted into the matching hole; and the limiting plate is also provided with an elastic trigger switch for determining the workpiece to be clamped to the machining position.

2. The sensor pin auto-sensing fixture of claim 1, wherein: the tool clamp comprises a turntable; the chuck is arranged on the front surface of the turntable through the pneumatic base, and the clamping center of the chuck is superposed with the axis of the turntable; the tail end of the positioning head is connected to the turntable; the back of the rotary table is linked to the motor through a transmission shaft.

3. The sensor pin auto-sensing clamping mechanism of claim 2, wherein: the displacement assembly comprises an X-direction unit and a Z-direction unit; the X-direction unit comprises a first linear module moving along the axial direction of the clamped workpiece; the Z-direction unit comprises a second linear module which is based on the symmetrical center of the vertical axis of the clamped workpiece and moves along the radial direction of the clamped workpiece; the limiting plate is pushed by the X-direction unit, and the X-direction unit is pushed by the Z-direction unit.

4. The sensor pin auto-sensing clamping mechanism of claim 2, wherein: the side of the tool clamp is also provided with a plurality of sensing heads for detecting the clamping state of the workpiece.

5. The sensor pin auto-sensing clamping mechanism of claim 2, wherein: the vision camera is matched with the laser welding device, and the vision camera carries out position precision detection on the focusing point and the welding point of the laser beam passing through the annular light source.