Lead insertion system

This application claims the benefit of the filing date under 35 U.S.C. § 119(a)-(d) of Chinese Patent Application No. 201811465164.6, filed on Dec. 3, 2018.

The present invention relates to a lead insertion system and, more particularly, to a lead insertion system adapted to insert a lead into a glass tube.

A temperature sensor can include a glass tube and a lead, usually a metal lead, inserted into the glass tube. In the process of manufacturing the temperature sensor, it is necessary to heat the glass tube to soften the glass tube, so that the lead may be successfully inserted into the glass tube.

The lead is generally manually inserted into the glass tube. For example, a worker grips the glass tube with one hand using a special gripper and places the glass tube on the flame for heating. With the other hand, the worker grips the lead through another special gripper and inserts the lead into the heated and softened glass tube. However, it is inefficient to insert the lead into the glass tube manually. Further, the heating time of the glass tube cannot be accurately controlled, and the glass tube cannot be accurately heated to a predetermined softening degree, which may reduce the quality of the temperature sensor.

A lead insertion system adapted to insert a lead into a glass tube includes a first robot on which a first gripper is mounted and a second robot on which a second gripper is mounted. The first gripper grips the glass tube and the second gripper grips the lead. The lead insertion system includes a flame heater heating the glass tube gripped by the first robot and the lead gripped by the second robot with a flame. The second robot inserts the lead into the glass tube held by the first robot with the lead heated by the flame and the glass tube heated and softened by the flame.

The invention will now be described by way of example with reference to the accompanying Figures, of which:

FIG. 1 is a perspective view of a lead insertion system according to an embodiment; and

FIG. 2 is a sectional side view of a lead inserted into a glass tube.

Exemplary embodiments of the present disclosure will be described hereinafter in detail with reference to the attached drawings, wherein like reference numerals refer to like elements. The present disclosure may, however, be embodied in many different forms and should not be construed as being limited to the embodiment set forth herein; rather, these embodiments are provided so that the present disclosure will convey the concept of the disclosure to those skilled in the art.

In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are schematically shown in order to simplify the drawing.

A lead insertion system according to an embodiment, as shown in FIG. 1 , comprises a first robot 100 , a second robot 200 , and a flame heater 300 . The lead insertion system is adapted to automatically insert a lead 20 into a glass tube 10 , as shown in FIGS. 1 and 2 .

As shown in FIG. 1 , a first gripper 110 adapted to grip the glass tube 10 is mounted on the first robot 100 . A second gripper 210 adapted to grip the lead 20 is mounted on the second robot 200 . The flame heater 300 is configured to generate a flame 310 and heat the glass tube 10 gripped by the first robot 100 and the lead 20 gripped by the second robot 200 with the flame 310 . The second robot 200 is adapted to insert the heated lead 20 into the heated and softened glass tube 10 held by the first robot 100 .

In an embodiment, the first robot 100 is adapted to control the heating time of the glass tube 10 on the flame 310 to ensure that the glass tube 10 has been heated to a predetermined softening degree at the beginning of inserting the lead 20 into the glass tube 10 . In this way, the lead 20 may be smoothly and successfully inserted into the glass tube 10 . The second robot 200 , in an embodiment, is adapted to control the heating time of the lead 20 on the flame 310 to ensure that the lead 20 has been heated to a predetermined temperature at the beginning of inserting the lead 20 into the glass tube 10 . In this way, in the process of inserting the lead 20 into the glass tube 10 , a portion of the glass tube 10 in contact with the lead 20 may be heated and melted by the lead 20 with the predetermined temperature, and which may ensure that the lead 20 is more smoothly and successfully inserted into the glass tube 10 .

As shown in FIG. 1 , the flame 310 of the flame heater 300 is adapted to heat the glass tube 10 and the lead 20 simultaneously. The lead 20 and the glass tube 10 are always placed on and heated by the flame 310 throughout the process of inserting the lead 20 into the glass tube 10 . In this way, it may prevent the glass tube 10 from hardening in the process of inserting the lead 20 into the glass tube 10 , thus ensuring that the lead 20 may be smoothly inserted into the glass tube 10 .

In the process of inserting the lead 20 into the glass tube 10 , as shown in FIG. 1 , the first robot 100 holds the glass tube 10 , and the second robot 200 moves the lead 20 towards the glass tube 10 to insert the lead 20 into the glass tube 10 held by the first robot 100 . After inserting the lead 20 into the glass tube 10 , the second gripper 210 of the second robot 200 loosens the lead 20 , and the first robot 100 removes the glass tube 10 inserted with the lead 20 from the flame 310 . After the glass tube 10 and the lead 20 are cooled, the glass tube 10 hardens, and the inserted lead 20 is fixed on the glass tube 10 .

As shown in FIGS. 1 and 2 , in an embodiment, an end of the lead 20 is inserted into the glass tube 10 from an end of the glass tube 10 . The first robot 100 is adapted to move the end of the gripped glass tube 10 onto the flame 310 for heating, and the second robot 200 is adapted to move the end of the gripped lead 20 onto the flame 310 for heating.

In the embodiment shown in FIG. 1 , the first robot 100 and the second robot 200 are each multi-degree-of-freedom robots. The first robot 100 and the second robot 200 are respectively arranged on both sides of the flame heater 300 . In this way, the lead 20 may be efficiently and rapidly inserted into the glass tube 10 through the cooperation of the first robot 100 and the second robot 200 .

It should be appreciated for those skilled in this art that the above embodiments are intended to be illustrative, and not restrictive. For example, many modifications may be made to the above embodiments by those skilled in this art, and various features described in different embodiments may be freely combined with each other without conflicting in configuration or principle.

Although several exemplary embodiments have been shown and described, it would be appreciated by those skilled in the art that various changes or modifications may be made in these embodiments without departing from the principles and spirit of the disclosure, the scope of which is defined in the claims and their equivalents.