JPH054182B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a molten metal clamping control device.

(Prior art) For example, when installing a female thread in a ceramic cut-out switch, conventionally, a nut was inserted into a recess formed in the switch and fixed with hard lead, or the nut was filled with hard lead. A method of machining was used. Filling with hard lead is carried out by workers using a ladle to pump up the appropriate amount from the melting tank and pouring it in. There is a risk of burns due to the high temperature, and there is also the risk of inhaling the gas generated as the workers work near the melting tank. However, there were drawbacks and problems such as manual work requiring skill.

(Technical Problems) The purpose of the present invention is to solve the above-mentioned problems, to save labor and improve accuracy by automating the melting and extraction of hard lead, and to improve the working environment while increasing productivity. It is an object of the present invention to provide a molten metal pulling control device that does not have the problems of danger and skill required in the prior art.

(Technical Means) The present invention, which achieves the above object, is an apparatus for fixing molten metal to ceramic or other heat-resistant parts that are difficult to machine, and includes a melting tank equipped with a heater for superheating and melting the metal. It consists of a control valve that controls the flow of molten metal sent from the melting tank through a pipe line, and an extraction pipe connected to the outlet side of the control valve.
This is a molten metal extraction control device in which the control valve and the extraction tube are each equipped with a heater for keeping the metal in a molten state.

(Example) To explain with the illustrated example, 1 is a melting tank, 2 is a control valve that controls opening and closing of the flow of molten metal, 3 is a valve control mechanism, and 4 is an extraction pipe connected to the outlet side of the control valve 2. , 5, 6, 7, and 8 are heaters respectively attached to the dissolution tank 1, the control valve 2, the sleeve portion 9 of the control mechanism 3, and the extraction tube 4.
8 are connected to a control panel 10 as shown in FIG. 7 and are electrically temperature controlled.

The melting tank 1 is formed into a cylindrical shape from a material that can withstand the melting of hard lead, a heater 5 is fixed inside by a stay 11, and molten metal is supplied through a small hole 12 at the bottom. Normally, the opening 13 is covered by a lid 14.

The control valve 2 is connected to the melting tank 1 which is supplied by the pipe 15.
It controls the opening and closing of the flow of molten metal from 2
0 is the valve box, 21 is the valve seat, 22 is the valve body, 23, 24
25 is a valve path, 25 is a valve stem, and 26 is a labyrinth seal. Reference numeral 30 denotes a casing of the control mechanism 3, which is connected to the sleeve portion 9 through a cap nut 32 by a lower yoke 31, and has a stem 3 integrated with the valve shaft 25.
It has a built-in diaphragm 34 fixed at 3.
Opening and closing of the valve body 22 is controlled by introducing air from a port 37 into another chamber partitioned off by a diaphragm 34 which is pressurized by a valve closing spring 35 via a disk 36 . 38 is a diaphragm presser, and 39 is a lift indicator. The operating air of the diaphragm 34 is also electrically controlled by the control panel 10.

Further, the valve box 20 is heated by a heater 6, and the heater 6 is one or two heaters surrounding the valve box 20.
The heating element 27 is made up of one or more heating elements 27, and is fixed by a fitting 28 such as a band. The extraction tube 4 connected to the control valve 2 has a heater 8 over almost its entire length. By forming a microhole around the nozzle 40 at the tip and supplying a small amount of nitrogen gas, it is possible to prevent hard lead oxide from adhering and clogging the nozzle.

In addition, 41 is a ceramic workpiece, 42 is a recess pre-formed in its fixed position, 43 is hard lead, 44 is a female screw, and 45 is a conveyance processing control panel that conveys and moves the table on which the workpiece 41 is placed up and down. .

(Operation of the invention) In the above configuration, hard lead is heated and melted by the heater 5 in the melting tank 1 by operating the control panel 10, and the valve box 20 and sleeve portion 9 of the control valve 2 are heated and melted in accordance with the melting. The heaters 6 and 7 are respectively raised in temperature, and the heater 8 of the extraction tube 4 starts raising the temperature at a timely time before the start of the work. When performing extraction work by operating the control panel 10, air enters the casing 30 in response to the signal, pressurizes the diaphragm 34 against the spring 35, so the valve shaft 25 integrated with the stem 33 retreats, and the valve body 22 By moving away from the valve seat 21, the valve passage 2
3 and 24 are connected, and molten hard lead is discharged from the extraction tube 4. The extraction amount can be selected depending on the valve opening time.

In addition, regarding the workpiece 41 side, the processing control panel 4
By the operation 5, the workpiece 41 is transported to a fixed position, raised, subjected to hard lead pinching, and lowered. When inserting a nut into a hard lead, the workpiece is raised to a fixed position, the insert nut supplying robot is operated to set the nut in a predetermined position, and the nut is removed. After removing the hard lead, move the workpiece and perform finishing or necessary machining.

(Effects of the Invention) Since the present invention is configured and operates as described above, the work from melting to extraction of metals such as hard lead can be performed automatically, thereby saving labor and improving accuracy. At the same time, there is no need to work around the melting tank, so working conditions in a high-temperature working environment with generated gas are improved, and the work can be carried out safely without requiring any skill.

[Brief explanation of the drawing]

The drawings show an embodiment of the molten metal reduction control device according to the present invention, and FIG. 1 is an explanatory side view, FIG. 2 is an exploded perspective view, and FIG. 3 is a cross-sectional view of the control valve heater section. Figure 4 is a longitudinal sectional view of the control valve, Figures 5 and 6.
The figure is an explanatory diagram of the pruning process, and FIG. 7 is a block diagram of the control system. 1...Dissolution tank, 2...Control system, 3...Valve control mechanism, 4...Extraction tube, 5, 6, 7, 8...Heater.

Claims (1)

[Claims] 1 A device for fixing molten metal to ceramic or other heat-resistant parts that are difficult to machine, including a melting tank equipped with a heater that heats and melts the metal, and a melting tank that sends the molten metal through a pipe from the melting tank. A molten metal extraction control device comprising a control valve for controlling the flow of molten metal and a extraction tube connected to the outlet side thereof, and a heater for maintaining the metal in a molten state is attached to the control valve and extraction tube, respectively.