JPH0124144Y2 - - Google Patents

Description

[Detailed Description of the Invention] In conventional spring heat treatment machines, the spring is inserted into the upper inlet of the furnace and moved around inside the electric furnace, so that the heat-treated spring comes out from the lower outlet. As a result, the temperature at the top, middle, and bottom of the furnace varied, and the rate at which the spring was heated was not constant.
Therefore, there was a problem that the performance of the heat-treated springs was uneven.

The present invention was devised to overcome the above-mentioned difficulties. Hereinafter, the present invention will be explained with reference to an embodiment of the drawing. When the received spring 3 is assembled to a certain extent, the provided air nozzle 4
It is equipped with a duct 1 for operating the duct and moving it toward the furnace, and a heater 6 controlled by a solenoid valve 5, etc., the temperature inside the furnace is adjusted by an internal fan 7, and a spring 3 to be heat treated is mounted. Furnace 2 equipped with an entrance 2a for a drawer 10
and a drawer 10 which is attached to a piston rod 9 of a cylinder 8 to receive a spring 3 falling from a duct 1, and which can be moved in and out of the furnace entrance 2a and closes the furnace entrance during heat treatment. .

The size of furnace 2 is width 45cm, depth 30cm, height 20cm.
The temperature inside the furnace is approximately 300℃.

As shown in FIGS. 1 and 2, three heaters 6 are installed in the left half of the furnace 2, and a fan 7 is installed in the space inside the furnace wall from the left side of FIG. The heater 6 is sprayed through the hole 2b to even out the temperature in the furnace. 11 is a motor. 5 is a solenoid valve whose details are omitted, but it controls opening and closing of the heater in conjunction with the heater 6 via a switch. Additionally, a switch 12, a timer 13, a temperature controller 14, and a circuit breaker are also provided. The position of the duct 1 in FIG. 1 is such that the associated drawer 10 is inserted straight into the furnace entrance 2a, but it is shown downward to show the structure of the furnace. Unheated springs 3 as shown in FIG. 3 are dropped from the inlet 1a of the duct 1 provided close to the furnace 2, and when a certain number of springs 3 are reached, an air nozzle 4 provided in a part of the duct 1 is activated due to their weight. The spring 3 is blown away and falls into a tray or drawer 10 provided at the bottom of the end of the duct 1. The duct 1 is inclined in the direction in which the spring 3 is blown. The drawer 10 is fixed to the tip of the piston rod 9 of the cylinder 8 installed outside the furnace 2, so when a certain number of springs of the drawer 10 are inserted, the cylinder 8 operates and the piston rod 9 of the furnace 2 moves to the drawer 10. into the furnace. At this time, the back plate 10a of the drawer 10 closes the inlet 2b of the furnace drawer. Heater 6
The electric fan 7 sends heat to the coil and quickly adjusts the temperature inside the furnace to a constant amount of heat. 11, when the spring is properly heated by the motor, the electric fan is stopped, the heating of the heater 6 is released, and the drawer 10 is taken out of the furnace by the action of the cylinder 8, and at the same time, the furnace is turned off, and the heater 6 installed in the drawer 10 is turned off. The coil 3, which has been heat-treated by the action of the air nozzle, is dropped into an outer box and becomes a processed product. The thickness of the coil 3 is about 1.2 mm in diameter, the length is 15 to 20 mm, and the diameter of one turn is 12 to 13 mm.

In addition, the method of connecting the drawer and the piston rod, the number of heaters, the structure of the duct, the installation procedure of the air nozzle, and any other arbitrary designs other than those described in the specification and drawings within the scope of the spirit of the present invention. Changes can be made freely.

According to the present invention, a large number of springs can be uniformly and efficiently heat-treated. Since it is operated semi-automatically, it has good work efficiency and can reduce the number of personnel.

The furnace does not need to have a heater on all the time, and since it is not a particularly large furnace, when the drawer 10 is loaded with springs and enters the furnace, the heater is activated automatically to uniformly adjust the temperature of the fan 7 and to make the spring uneven within a short time. Since heat treatment can be performed without any heat treatment, a uniform product can be produced. It has a simple structure, is easy to manufacture, and can be manufactured at low cost, so it has great practical benefits.

[Brief explanation of the drawing]

Fig. 1 is a partially vertical plan view showing the relationship between the furnace and duct of the present invention; Fig. 2 is a partially cross-sectional plan view showing the related situation between the furnace, duct, and drawer;
The figure is a perspective view of the spring. 1...Duct, 1a...Inlet, 2...Furnace, 2a
...Drawer entrance/exit, 2b...hole, 3...spring, 4...air nozzle, 5...solenoid valve, 6
... Heater, 7 ... Electric fan, 8 ... Cylinder, 9 ... Piston rod, 10 ... Drawer,
10a... Back plate, 11... Motor, 12... Switch, 13... Timer, 14... Temperature controller.

Claims (1)

[Scope of utility model registration request] When the received springs 3 have gathered to a certain extent, they are moved to the furnace by operating the air nozzle 4 provided in the duct 1, and the internal electric fan is equipped with a heater 6 controlled by a solenoid valve 5, etc. The temperature inside the furnace is adjusted by 7, and the furnace 2 is provided with an inlet/outlet 2a of a drawer 10 carrying a spring 3 to be heat treated, and an inlet/outlet of the furnace is attached to a piston 9 of a cylinder 8 to receive a spring 3 falling from a duct 1. A spring heat treatment machine comprising a drawer 10 that can be advanced and retracted from 2a to close the entrance of the furnace during heat treatment.