JPS6313776B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a crimping device for a cylindrical member, and in particular, when a piston is crimped and fixed to a steering rack, the quality of the crimped state is automatically detected without relying on visual inspection by an operator. The present invention relates to a device equipped with a caulking detection device.

As a conventional caulking device, for example, the one shown in FIGS. 1 and 2 without the caulking detection device M and the measurement control panel N has been generally used.

Reference numeral 1 designates a rack for power steering as a shaft, one end of which is held by chucking on the headstock 3 of the rotary drive unit 2 of the crimping device, and the other end is connected to the main shaft by the center 5 of the tailstock 4 of the crimping device. Its axis is pushed in the direction of the table 3 and is held at the machining position by the headstock 3 and center 5.

A tube clamp 6 supports the rack 1 near its center.

7 is a piston as a cylindrical member fitted to the rack 1 via an O-ring 8; 9 is a crimping device 10;
The hydraulic cylinder 11 (hereinafter referred to as
The cylinder 11) presses the flange 7a of the piston 7, and as the rack 1 rotates, the entire circumference of the flange 7a is pressed against the groove 1a of the rack 1.
It is supposed to be caulked and fixed.

However, with such a conventional crimping device, in order to check whether the flange 7a is properly crimped, there is an inconvenience that the operator must remove the rack after crimping from the crimping device and visually check it. In addition, when the piston and the crimping roller idle, it is difficult to judge the crimping condition by visual inspection alone, and therefore, there is a problem in that extra man-hours are required for confirmation.

The present invention was made by focusing on such conventional problems, and includes a crimping machine for fixing a cylindrical member to a shaft, and a support base fixed to a rod that is provided so as to be able to approach and separate from the cylindrical member. , a pinch roller rotatably fitted onto a fixed shaft fixed to the support base, and a photoelectric switch attached to the support base such that the light beam is blocked by a light shielding plate fixed to the pinch roller. It is an object of the present invention to solve the above-mentioned problems by providing a caulking device characterized by comprising the configured caulking detection device.

The present invention will be explained below based on the drawings.

1 to 3 are diagrams showing one embodiment of the present invention, and the parts common to the conventional example have already been described in detail in the description of the conventional example, so a redundant explanation will be omitted.

First, to explain the configuration, reference numeral 20 is a pinch roller with a rubber roller 21 fixed to its outer periphery, which is rotatably fitted to a fixed shaft 23 via a ball bearing 22, and the fixed shaft 23 is fixed to a support base 24 so as not to rotate. has been done. Reference numeral 25 denotes a light shielding plate attached to the end of the pinch roller 20, which rotates together with the pinch roller 20 to intermittently block the light beam of the photoelectric switch 26 attached to the support base 24. .

M is a caulking detection device composed of the above-mentioned parts, and is attached to the rod 28 of the fluid pressure cylinder 27. When the pinch roller 20 is pressed against the piston 7 by the pressure of the cylinder 27, the rubber roller Due to friction with 21, they roll into contact with each other without slipping.

Reference numeral N designates a measurement control panel that receives a detection signal of the engagement status between the light shielding plate 25 and the photoelectric switch 26, determines and displays the crimping state, and controls the crimping device.

Next, the action will be explained.

The rack 1 with the piston 7 fitted in a predetermined position via the O-ring 8 is held at the machining position by the headstock 3 and the center 5, as already detailed in the prior art.

Next, the crimping device 10 is advanced toward the rack 1 by the cylinder 11, and the crimping roller 9 is brought into contact with the flange 7a of the piston 7. On the other hand, the caulking detection device M is advanced toward the rack 1 by the fluid pressure cylinder 27, and the pinch roller 20 is brought into contact with the piston 7 (see FIG. 2).

Next, when the rack 1 is rotated by the headstock 3 and feed is applied to the crimping roller 9 by the cylinder 11, the flange 7a is gradually deformed and crimped onto the rack 1.

On the other hand, the pinch roller 20 in contact with the piston 7
The light shielding plate 25 fixed to the pinch roller 20 rotates in synchronization with the rotation of the piston 7 by rolling contact with the piston 7 rotating together with the rack 1 by the rubber roller 21 without slipping.

The number of revolutions of the rack 1 at which a sufficient crimping state can be obtained in relation to the amount of feed of the crimping roller 9 is experimentally determined in advance, and the number of times the photoelectric switch 26 of the light shielding plate 25 blocks the light beam corresponds to the number of revolutions. is sent as a signal to the measurement control panel N, and the caulking state is determined and displayed.

At this time, if the piston 7 idles or slips relative to the rack 1, the pinch roller 20
The rotation of the light shielding plate 25 is also stagnant in the same way as the piston 7, and therefore, the number of times the light beam is blocked by the light shielding plate 25, which does not reach the predetermined number of times, is sent to the measurement control panel N, and as a result, it is determined and displayed as a caulking failure.

As explained above, according to the present invention, in a crimping machine for fixing a cylindrical member to a shaft, the crimping machine includes a support base fixed to a rod that is provided so as to be able to approach and separate from the cylindrical member, and the support base. A pinch roller rotatably fitted to a fixed shaft fixed to the pinch roller, and a photoelectric switch attached to the support base so that the light beam is blocked by a light shielding plate fixed to the pinch roller. Since the crimping device is equipped with a crimping device, the quality of the crimping condition is automatically and reliably displayed, so there is no misidentification of defective products. The effect of eliminating the need for man-hours for confirming whether caulking is good or bad by means can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of a piston caulking device, FIG. 2 is an enlarged view of the main parts with a partial cross section of the piston caulking device according to the present invention, and FIG. 3 is an enlarged perspective view of a pinch roller according to the present invention. . DESCRIPTION OF SYMBOLS 1... Shaft (rack), 7... Cylindrical member (piston), 20... Pinch roller, 23... Fixed shaft, 24... Support stand, 25... Light shielding plate, 26...
...Photoelectric switch, 28... Rod, M... Caulking detection device.

Claims (1)

[Claims] 1. A caulking machine for fixing a cylindrical member to a shaft, a support base fixed to a rod that can move close to and away from the cylindrical member, and a pinch roller rotatably fitted to a fixed shaft fixed to the support base. and a photoelectric switch attached to the support base so that the light beam is blocked by a light shielding plate fixed to the pinch roller.