JPH04322837A - Member for controlling z axis stroke in rivet caulking apparatus - Google Patents

Abstract

PURPOSE:To uniformly press and caulk rivets having different height positions by controlling the lowest descending point of spindle so as to receive lower end rim part of a plunger tube with peripheral part of a through-hole at bottom part of a stopper body. CONSTITUTION:The plunger tube 55 and the caulking spindle 58 are vertically slided and at the same time, the caulking spindle 58 is rotated. By rotating an adjustor body 9, the stopper body 1 engaged with this is rotated. As the stopper body 1 is screwed with lower end part of the cylinder body, this is vertically shifted (the arrow mark (f)) in the range of adjusting distance with the rotating direction. By abutting the peripheral part 8 of opening in the through-hole 2 on a reinforcing ring at lower end part of the working tube 55, the lowest descending point in the plunger tube 55 is suitably adjusted and set.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a Z-axis stroke control mechanism added to a rivet caulking device. Specifically, the present invention relates to a mechanism that is attached to a rivet caulking device to adjust and control the lower limit of the Z-axis (vertical axis) movement (stroke) of a caulking spindle at any time.

0002

2. Description of the Related Art Conventionally, a rivet caulking device (riveting machine) has a working table 50 as shown in FIG.
A configuration is adopted in which an X-Y table 51 is placed above and a caulking machine 52 is placed upright above it. Caulking machine 52
A plunger tube 55 is built in a substantially cylindrical cylinder body 53 and is moved up and down by an actuating means 54. Inside the plunger tube 55 is a rotary rod 57 that is pivotally supported by a bearing 56 and moves up and down together, and a caulking spindle 58 is attached to the lower end of the rotary rod 57. This rotating rod 57 and caulking spindle 5
8 is given axial rotation by a drive motor 59 attached to the upper end.

With this configuration, the rivet crimping device operates as follows. A workpiece 61 of a predetermined standard and rivets, screws, screws, etc. (hereinafter referred to as "rivets, etc.") 62 are set on a workpiece stage 60 placed on an X-Y table 51, and a preset positioning program is set. Move the X-Y table 51 appropriately according to (arrow a)
let Then, it is temporarily stopped at a predetermined position, and the rotating rod 57 and the crimping spindle 58 are lowered by the action of the actuating means 54 using compressed air or the like (arrow b), and the head 63 of the rivet or the like 62 is pressed and the so-called scraping motion ( The screw head 63 is fixed to the workpiece 61 by caulking by a circular motion in which the rotation axis rotates at a constant inclination to the vertical axis.

[0004] Such operations are repeated according to a setting program to attach a specified rivet or the like 62 to a predetermined position on the workpiece 61. Note that FIG. 3 shows an arrangement in which the caulking machines 51 having the above configuration are installed in parallel. This is so that spindles 58 with different diameters can be attached to each of them so that rivets and the like 62 with different head diameters can be handled at the same time.

[0005]

[Problems to be Solved by the Invention] However, in the conventional rivet crimping device crimping machine 51, there was no particular problem when the workpiece 61 to be processed was in the shape of a flat plate; I am not in such a state,
As shown in FIG. 4, since there is a slight step 64, there is a problem when the heights of the heads 63 of the rivets, etc. 62 are different. That is, in such a case, the conventional device deals with the pressurization time of the head 63 by setting a timer, but due to limitations such as the regulation of compressed air, timer accuracy, and response speed of the solenoid valve, the caulking height cannot be adjusted. It was difficult to achieve processing accuracy of 0.01 mm. As a result, the pressing time was too short, resulting in insufficient adhesion, or conversely, the pressing time was too long, resulting in the head 63 being destroyed, resulting in many variations in the product.

[0006]The present invention has been made with the aim of solving this problem.The lowest point of the stroke of the spindle 58 can be adjusted to the height of the head 63 of various rivets, etc. 62 on the same workpiece 61. By providing a control mechanism that can be set at any time according to the position, it is possible to perform uniform caulking, and by adopting a wide control range, the Z-axis of the rivet caulking device can be quickly adapted to the shapes of workpieces 61 of various standards. It provides a stroke control mechanism.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the present invention is constructed as follows. On the X-Y table, there is a roughly cylindrical cylinder body arranged in the Z-axis direction (vertical direction), a roughly cylindrical plunger tube that moves up and down inside this cylinder body, and a rotatable body inside this plunger tube. A rivet caulking device consisting of a rotating rod that is pivotally supported by the plunger tube and moves up and down with the plunger tube, a caulking spindle attached and fixed to the lower end of the rotary rod, and a rotating means that rotates the rotating rod and the caulking spindle. The cylinder body has a cylindrical shape with a bottom, and a through hole through which the caulking spindle passes is formed at the bottom of the cylinder body. It is characterized by comprising a stopper body attached to the outer peripheral edge of the lower end, a moving means for moving the stopper body up and down and stopping it at an appropriate position, and a driving means for driving the moving means.

Further, in this moving means, the stopper body is screwed onto the outer peripheral edge of the lower end of the cylinder body, and the stopper body is rotated by the driving means to adjust the vertical movement of the stopper body. Features.

[0009]

[Operation] The above structure operates as follows. The moving means operates according to a preset program to rotate the stopper body. Since the stopper body is screwed into the lower end of the cylinder body, it rotates by a set amount according to the rotation direction and moves in the vertical direction. Then, the lower end edge of the plunger tube is received around the through hole at the bottom of the stopper body, and the lowest point of the crimping spindle is adjusted and controlled.

0010

Embodiments Next, specific embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view showing this embodiment, and FIG. 2 is a partially cutaway perspective view thereof. Reference numeral 1 denotes a stopper body having a cylindrical shape with a bottom, and a through hole 2 in the shape of which a caulking spindle 58 is loosely inserted.
has been established. Further, a screw spiral 4 is formed on the inner peripheral surface of the upper opening edge 3, and a gear 5 is formed on the outer peripheral surface. The stopper body 1 is constructed by screwing together the threaded spiral 4 and the threaded spiral 6 formed on the outer circumferential surface of the distal end of the cylinder body 53, and passing the caulking spindle 58 through the through hole 2, so that the lower end of the cylinder body 53 is secured to the stopper body 1. It is attached to the section. A donut-shaped reinforcing ring 7 is attached to the lower end surface of the plunger tube 55, and is adapted to abut against the opening periphery 8 of the through hole 2.

Next, reference numeral 9 denotes a cylindrical adjuster body, and a gear 10 that meshes with a gear 5 formed on the outer circumferential surface of the stopper body 1 is formed on the outer circumference of the adjuster body over the entire circumference. . The adjuster body 9 is arranged along the cylinder body 53, and is given axial rotation by a driving means (not shown) such as a servo motor. In this embodiment, the wheel 12 attached to the upper end shaft 11 of the adjuster body 9 is driven by the timing belt 13 to provide rotation, but the invention is not limited to this, and other synchronous transmission mechanisms can be used. It may be driven by means.

[0012] Here, the configurations of the cylinder body 53, plunger tube 55, and caulking spindle 58 are not particularly different from those of the prior art example, so their explanations will be omitted. With the above configuration, this embodiment operates as follows. First, the plunger tube 55 and the crimping spindle 58 are moved up and down by the actuation action (arrow c), and the crimping spindle 58 is simultaneously rotated (arrow d), as in the conventional example.

Next, by rotating the adjuster body 9 (arrow e), the stopper body 1 that meshes with the adjuster body 9 is rotated. Since the stopper body 1 is screwed into the lower end of the cylinder body 53, it moves up and down (arrow f) within the range of the adjustment distance 14 depending on the direction of rotation. And through hole 2
The opening periphery 8 is the reinforcing ring 7 at the lower end of the actuating tube 55.
By coming into contact with this, the lowest point 15 of the plunger tube 55 can be adjusted and set as appropriate.

[0014] In the above embodiment, the case where the cylinder body 1 is one is explained, but the present invention can be applied to two cylinder bodies 1 arranged side by side as in the conventional example. It is. Further, the adjustment body 9 is made cylindrical so that it can be applied even when the position of the cylinder body 1 is moved up and down according to the shape of various workpieces 63.

[0015]

[Effects] With the above configuration, the present invention has the following effects. Since the lowest position of the spindle for caulking rivets etc. can be adjusted, there is an advantage that rivets at different height positions can be uniformly pressed and caulked. Therefore, it is effective in reducing the defective rate and improving work efficiency.

Furthermore, since the adjustment of the stopper body is controlled by the synchronous transmission drive means, by programming the adjustment settings in advance, it is possible to quickly and accurately caulk the stopper body. Furthermore, since the adjustment distance can be increased,
It becomes possible to deal with a variety of workpieces 61 of various standards. By the way, when the adjustment distance was set to ±20 mm, it was possible to deal with about 98% of the work types.

Furthermore, since the stopper body is moved by the drive means, it is possible to accommodate differences in height of rivets, etc. in microns even within the same workpiece.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a part of the present invention.

FIG. 2 is a partially cutaway perspective view showing parts of the present invention.

FIG. 3 is an overall plan view showing a conventional rivet crimping device.

FIG. 4 is a partially cross-sectional schematic diagram showing a conventional rivet caulking process.

[Explanation of symbols]

1 Stopper body 2 Through hole
4 Screw spiral 5 Gear 8 Peripheral area of through hole 9 Adjuster body
10 Gear 51 X-Y table 53 Cylinder body 55 Plunger pipe

Claims (2)

[Claims] Claim 1: A substantially cylindrical cylinder body (5) arranged in the Z-axis direction (vertical direction) on an X-Y table (51).
3), a substantially cylindrical plunger pipe (55) that slides up and down within this cylinder body (53), and this plunger pipe (
55), and is rotatably supported within the plunger tube (
A rotating rod (57) that moves up and down with 55), a caulking spindle (58) attached and fixed to the lower end of this rotating rod (57), and giving rotation to this rotating rod (57) and the caulking spindle (58). Rotating means (59
), the rivet caulking device has a cylindrical shape with a bottom, a through hole (2) through which the caulking spindle (58) passes is formed at the bottom, and a peripheral portion (8) of the through hole (2). ) is attached to the outer peripheral edge of the lower end of the cylinder body (53) such that the stopper body (1) comes into contact with the lower edge of the plunger tube (55), and the stopper body (1) is moved up and down. A Z-axis stroke control mechanism for a rivet caulking device, comprising: a moving means (9) for stopping at an appropriate position; and a driving means for driving the moving means (9). 2. In the moving means (9), the stopper body (1) is screwed onto the outer peripheral edge of the lower end of the cylinder body (53), and the stopper body (1) is connected to the drive means (12) and (13).
2. The Z-axis stroke control mechanism for a rivet caulking device according to claim 1, wherein the position of the stopper body (1) is adjusted up and down by rotating the stopper body (1).