JPS587418B2 - press equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a press device for press-fitting a press-fitting body such as a shaft into a through-hole of a press-fitted human body such as a gear, and the press-fitting strength of the press-fitting body into the press-fitted body is within a certain allowable limit. The purpose is to detect whether the finished product is present and to determine whether the finished product is good or bad.

Conventionally, as shown in FIG. 1, when press-fitting a press-fitting body such as a shaft 3 into a through-hole of a press-fitting body such as a boss 1 or a gear 2, the dimensions of the fitting part of the shaft 3 and the through-hole of the boss 1 or gear 2 have been determined. Due to variations in hole diameter, variations in press-fit strength occur in the finished product.

Therefore, it is necessary to inspect the press-fit strength separately from the press-fit process to ensure that the variation is within a certain allowable limit.

This invention takes the above points into consideration and makes it possible to determine whether or not the press-fit strength is within an allowable limit at the same time as press-fitting. 2
This will be explained in detail with reference to FIG.

Reference numerals 4 and 4 refer to the frames of the press equipment arranged in parallel, 5 and 5 support rods arranged in parallel between the frames 4 and 4, and 6 the base of which is supported and fixed to the support rods 5 and 5 by bolts 7 and plates 8, and is elastic. Detection plate made of metal material with high limit, 9 is detection plate 6
An adjustment screw 10 is an upper limit switch of an upper limit detection body provided on the frame 4 via a bracket 11, and is provided opposite to the adjustment screw 9, and It is turned on by the adjusting screw 9 by bending in the direction of arrow A in the figure.

Reference numeral 12 denotes a telescoping cylinder that serves as a driving source for a pressurizing body that is swingably supported at the tip of the detection plate 6; 13 is a cylinder 12;
An arm 15 is a support shaft fixed to a support plate 16 swingably provided on the upper part of the frame 4, and the arm 13 is rotatably provided.

17 is a rod pivotally supported at the other end of the arm 13 via a pin 18; 19 is a guide frame fixed to the side surfaces of the frames 4; 20 is a guide hole 21 of the guide frame 19;
The rod 17 is fitted into the arbor so as to be slidable in the vertical direction.

22 is a spring flange provided at the upper end of the rod 17, that is, the connecting portion of the cylinder 12; 23 is a vertically movable adjusting body screwed onto the upper end of the arbor 20; 24 is a spring flange provided between the flange 22 and the sleeve 23; The compression force of the spring 24 is adjusted by rotating the sleeve 23 to adjust the distance between the flange 22 and the sleeve 23.

25 and 26 are vernier scales formed on the arbor 20 and the sleeve 23, respectively, and the compressive force of the spring 24 can be confirmed by both scales 25 and 26.

An actuator 27 is fixed near the tip of the rod 17, and is led out from a through hole 28 formed in the arbor 20, and prevents the arbor 20 from rotating.
The upper ends of the through holes 28 abut against each other to prevent the arbor 20 from moving downward.

29 is an L-shaped bracket with one end fixed to the lower end of the arbor 20; 30 is a lower limit switch of a lower limit detector fixed to the other end of the bracket 29 opposite to the actuator 27; The actuator 27 is turned on when the actuator 27 moves beyond a certain level in the direction of the arrow B.

Note that the lower limit switch 30 is connected to the actuator 27
Even if the actuator 27 is pressed by and further moves in the direction of arrow B, it remains in the on state and is not destroyed.

Next, the operation of the above embodiment will be explained.

A pressurized human body such as a boss, gear, etc. and a pressurized human body such as a shaft are located below the arbor 20, and one end of the pressurized body is attached to the arbor 20.
comes into contact with the lower end of the cylinder 12 to operate the cylinder 12.

Due to the operation of the cylinder 12, the rod 17 is moved downward in the direction of arrow B via the arm 13, etc., and the rod 17 moves the arbor 20 downward via the flange 22 and spring 24, and a force in the direction of arrow B is applied to the arbor 20. The press-fitting body is then press-fitted into the press-fitted body.

Therefore, at the same time that the arbor 20 starts the press-fitting operation, the rod 17 moves downward while the spring 24 is compressed due to the resistance generated in the press-fitting body during press-fitting, and the actuator 27 turns on the lower limit switch 30.

Here, the press-fit body is pressurized by the sum of the compressive force of the spring 24 due to the movement of the actuator 27 until the lower limit switch 30 is turned on and the adjusted compressive force of the spring 24 by the sleeve 23 before the operation of the cylinder 12. The instruction by turning on the lower limit switch 30 indicates the lower limit value of the press-fitting strength.

That is, by adjusting the sleeve 23 using the vernier scales 25 and 26, an arbitrary lower limit of press-fitting strength can be set.

On the other hand, as the pressurization of the press-fitted body progresses, the resistance force of the press force is applied to the detection plate 6 via the cylinder 12, and the detection plate 6
Upon receiving the bending moment in the direction of the arrow, it deflects in the direction of the arrow A, and when the detection plate 6 deflects beyond a certain level, the upper limit switch 10 is turned on via the adjustment screw 9, indicating that the press-fitting strength is above the upper limit value.

Therefore, if the press-fit strength is within the upper limit, adjust the adjustment screw 9 so that the upper limit switch 10 is not turned on.
By rotating and adjusting the press fit strength can be set.

Note that the detection plate 6 and the spring 24 are made of products having an elastic limit higher than the upper limit of the press-fitting strength.

Further, in the embodiment described above, the detection plate 6 is used to detect the upper limit value, but it goes without saying that the upper limit value may also be detected by using a spring and controlling the ON operation of the upper limit switch 10 based on the compressed distance. .

As described above, according to the press device of the present invention, an adjusting screw is provided at the tip of the detection plate having a fixed base facing the upper limit detection body, and turns on the upper limit detection body by bending the detection plate. , a telescopic drive source provided at the tip of the detection plate, a rod connected to the drive source, an arbor into which the rod is slidably inserted and movable in the vertical direction, and an upper end portion of the arbor. an adjusting body provided to be movable up and down, a spring provided between the connecting portion of the rod to the drive source and the adjusting body, and an actuator provided on the rod to prevent the arbor from moving downward. By having a lower limit detection element installed in the arbor and turned on by the downward movement of the actuator, the press-fit strength can be measured at the same time as press-fitting, eliminating the need for a press-fit strength inspection process in the subsequent process, saving labor in the process. can be measured, and it is cheaper than measurement using a resistance wire strain meter or the like.

[Brief explanation of the drawing]

Figures 1a and b are respectively needle-view views of parts press-fitted by a press machine, Figure 2 is a partially cutaway front view of an embodiment of the press machine according to the present invention, and Figure 3 is the same as that of Figure 2. It is a partially enlarged perspective view. 2...Gear, 3...Shaft, 6.
...Detection plate, 10 ... Upper limit switch, 12 ... Cylinder, 17 ... Rod, 23 ... Sleeve, 24 ... ... Spring, 30 ... Lower limit switch.

Claims (1)

[Claims] 1. An adjustment screw that is provided at the tip of the detection plate having a fixed base opposite to the upper limit detection body and turns on the upper limit detection body by the bending of the detection plate, and an adjustable screw provided at the tip of the detection plate that is freely retractable. a driving source; a rod connected to the driving source;
an arbor into which the rod is slidably inserted and movable in the vertical direction; an adjustment body provided at the upper end of the arbor so as to be movable up and down; a connection portion between the rod and the drive source; and the adjustment body. a spring provided between the rod, an actuator provided on the rod to prevent the arbor from moving downward, and a lower limit detector provided on the arbor and turned on by the downward movement of the actuator. Device.