JPH07300228A - Part feeding device for projection welding machine - Google Patents

Abstract

PURPOSE:To correctly and simply determine the relative position between an axial part and a receiving hole and determine the optimum rotary position of a feeding rod. CONSTITUTION:A fixed bolt 32 connected to an air cylinder 21 is inserted into the circular arc hole 35 of a fixed base member 34 fitted to a stationary member 33, it is fixed with adjusting nuts 36, 37, and the circular arc hole 35 is bored along a circular arc centering on the axis X of electrodes 16, 17. A means adjusting the relative position between an air cylinder 21 and a feeding rod 2 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component supply device for a projection welding machine, and is used in a field where the relative position between the component supply device and the electrode is accurately obtained.

[0002]

2. Description of the Related Art As this type of component supply device, there is one disclosed in Japanese Patent Application Laid-Open No. 4-270075. There, the shaft-shaped part held by the holding member of the supply rod is stopped on the axis of the electrode by advancing the supply rod, and then the holding member is moved by an air cylinder along the axis of the electrode to form the shaft-shaped part. A type in which a component is inserted into a receiving hole of an electrode is disclosed.

[0003]

According to the above-mentioned prior art, when the shaft-shaped component held by the holding member is positioned on the axis of the electrode, the relative position between the shaft-shaped component and the electrode is determined. Since no means for adjusting is installed, it becomes very difficult to accurately determine the positional relationship between the shaft-shaped component and the receiving hole of the electrode, which may make it impossible to insert the component into the receiving hole. . At the same time, there is a need for a method that makes such adjustments as simple and accurate as possible.

[0004]

Means for Solving the Problem and Its Action The present invention is provided to solve the above-mentioned problems.
According to claim 1, the shaft-shaped component held by the holding member of the supply rod is stopped on the axis of the electrode by advancing the supply rod, and then the holding member is moved by an air cylinder along the axis of the electrode to rotate the shaft. In the type in which the cylindrical part is inserted into the receiving hole of the electrode, the fixing bolt connected to the air cylinder is fixed to the fixed base member by the adjusting nut while penetrating through the arc hole of the fixed base member attached to the stationary member. ,
The arc hole is opened along an arc centered on the axis of the electrode. The upper and lower positions of the supply rod are selected by a fixing bolt and an adjusting nut, and the arc rod is moved along the arc hole. The direction of the supply rod is selected by. A second aspect of the present invention is characterized in that the adjusting means according to the first aspect is provided for changing the relative position between the air cylinder and the supply rod, and the adjusting means intersects the axis of the electrode at a right angle. The position of the supply rod is adjusted along the virtual plane, and the shaft-shaped component held by the holding member and the receiving hole of the electrode are aligned.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments shown in the drawings will be described in detail below. A supply rod 2 is accommodated in the guide tube 1 in a retractable state, and a piston rod (not shown) of an air cylinder 3 connected to one end of the guide tube 1 is connected to the supply rod 2. A holding member 4 that temporarily locks a component is coupled to the tip of the supply rod 2, and supplies the component to the holding member 4 when the supply rod 2 is most retracted as shown by the solid line in FIG. It is configured. Therefore, the component supply pipe 5 is arranged in the immediate vicinity of the holding member 4. A substrate 6 having a triangular shape is welded to the guide tube 1,
The component supply pipe 5 described above is also welded to the substrate 6 via the bracket 7. A component supply hose 8 is connected to the component supply pipe 5 and extends from a part feeder (not shown).

The shaft-shaped component in this embodiment is a projection bolt 9 made of iron, and comprises a shaft portion 10 and a flange 11 integral with the shaft portion 10. The welding projections formed on the lower surface of the flange 11 are not shown. The holding member 4 has a cylindrical guide member 13 fixed to the main body 12 at the tip of the supply rod 2 by a method such as welding, and a ring-shaped magnet 14 is installed inside the holding member 4. The bolt 9 that has been pulled is adsorbed and held as shown in FIG. Reference numeral 15 is an air passage, which allows compressed air to flow when the bolt 9 is separated from the guide member 13 by air pressure against the attractive force of the magnet 14. The method of feeding air into the air passage 15 is not related to the core of the present invention, and thus the specific disclosure is omitted here. The component supply pipe 5 is provided with a notch 16 for passage when the shaft portion 10 is advanced. The main body 12 and the guide member 13 are made of non-magnetic stainless steel so that the attraction force of the magnet 14 acts more strongly on the bolt 9.

The movable electrode 16 is installed as a pair with the fixed electrode 17, and a steel plate component 18 is placed on the fixed electrode 17. A receiving hole 19 is formed in the center of the lower end of the movable electrode 16, and a magnet 20 is attached to the back of the receiving hole 19. In the case shown in the figure, both electrodes 16 and 17 are arranged in the vertical direction, and the axis line thereof is shown by a symbol X. In addition, the air cylinder 3, the guide tube 1, the supply rod 2
Are all arranged on the same axis, and the axis thereof is indicated by the symbol Y.

The air cylinder 21 is a tandem type in which two sets of cylinders and pistons are incorporated, and piston rods 22 and 23 from each of them are projected to the outside, and they are firmly fixed to the output plate 24. There is. A receiving plate 25 is welded to the upper part of the substrate 6, and the output plate 24 is closely attached to this and integrated with bolts 26 and nuts 27. The through hole 28 of the output plate 24 is largely opened as shown in the figure, and fine adjustments described later are thereby performed. Support plates 29, 29 are welded to the opposing position of the receiving plate 25, and the tip ends of the adjusting bolts 30, 30 screwed into the support plate 25 are pressed against the side surface of the output plate 24, and the lock nuts 31, 31 prevent loosening. ing.

A considerably thick fixing bolt 32 is firmly connected to the air cylinder 21, and a circular arc hole 35 is formed in a fixing base member 34 fixed to a stationary member 33, and the fixing bolt 32 is penetrated here to adjust vertically. Positioning is performed by nuts 36 and 37. As is apparent from FIG. 3, the arc hole 35 is opened along an arc centered on the axis X.

First, the component supply operation of this apparatus will be described. FIG. 1 shows a state in which the bolt 9 is temporarily locked by the holding member 4. Here, the supply rod 2 advanced by the air cylinder 3 has a shaft portion. 10 is stopped on the axis X, and then the output of the air cylinder 21 causes the supply rod 2
When the whole is lifted in the direction of the axis line X and air is ejected when the shaft portion 10 has entered the receiving hole 19 to some extent, the shaft portion 10 completely enters the receiving hole 19. After that, the supply rod 2 is retracted, the movable electrode 16 is lowered, the flange 11 is pressed against the steel plate component 18, and the energization / welding is completed. The distance L2 is set to be shorter than the stroke L1 of the air cylinder 21 so that the shaft portion 10 enters the receiving hole 19.

When the axis Y of FIG. 3 is adjusted around the axis X, the adjustment nut 36 is loosened and moved along the arc hole 35, and the adjustment nut 36 is tightened again to complete the adjustment around the axis X. Also, when adjusting the distance L2, the adjusting nuts 36 and 37 are mutually rotated to perform lock tightening at the place where L2 is set. Even if the entire device is manufactured with high accuracy, the shaft portion 10 and the receiving hole 19 may not be coaxial. At that time, loosen the bolts 26 and the nuts 27 and then loosen the adjustment bolts 30 and 30 to finely adjust the receiving plate 25 to the left, right, front and rear. When the above coaxial state is set, the bolts 2 at the four corners are set.
6. The nut 27 is firmly tightened, and at the same time, the adjustment bolts 30 and 30 and the lock nuts 31 and 31 are tightened to complete the coaxial adjustment. Since the above-mentioned through hole 28 is largely opened, such fine adjustment is possible, and this fine adjustment is made along an imaginary plane orthogonal to the axis X.

In the above-described embodiment, the triangular rod 6 is used and the feed rod 2 is advanced obliquely downward. However, the substrate 6 is formed in a square shape so that the feed rod 2 is horizontal. It may be configured to move back and forth in the direction. In the illustrated embodiment, the air hoses connected to the air cylinders are not shown. Further, the sequence control for obtaining the above-mentioned operation can be easily carried out by adopting a commonly used electromagnetically actuated air switching valve or electric control circuit,
Similarly, the specific disclosure is omitted.

[0013]

According to the present invention, the entire component supply device can be freely adjusted in the direction along the axis X by the fixing bolt that penetrates the arc hole, and therefore the stroke L1 and the distance L2.
It is possible to accurately determine the relationship with and only by simple adjustment work. Further, by moving the fixing bolt along the arc hole, the axis Y can be rotated around the axis X, and the supply rod and the like can be positioned without interfering with neighboring members. Becomes Further, since the relative position between the air cylinder and the supply rod can be changed to perform the delicate axial alignment adjustment between the shaft-shaped component and the axis line X, the supply accuracy can be set extremely precisely. Specifically, since the output plate and the receiving plate are configured to be finely adjusted in a free direction along an imaginary plane orthogonal to the axis X, the above-described axis alignment can be easily performed. Of.

[Brief description of drawings]

FIG. 1 is a side view in which a part of the entire device is longitudinally cut.

FIG. 2 is a sectional view taken along line (2)-(2) of FIG.

FIG. 3 is a plan view schematically showing a relationship between a circular arc hole and axis lines X and Y.

[Explanation of symbols]

 2 supply rod 4 holding member 9 axial part 16 fixed electrode 17 movable electrode X electrode axis 21 air cylinder 19 receiving hole 32 fixing bolt 33 stationary member 34 fixed base member 35 circular arc hole 36, 37 adjusting nut

Claims (2)

[Claims] 1. A shaft-shaped component held by a holding member of a supply rod is stopped on the axis of an electrode by advancing the supply rod, and then the holding member is moved by an air cylinder along the axis of the electrode to rotate the shaft. In the type in which the cylindrical part is inserted into the receiving hole of the electrode, the fixing bolt connected to the air cylinder is fixed to the fixed base member by the adjusting nut while penetrating through the arc hole of the fixed base member attached to the stationary member. ,
The component supply device for a projection welding machine, wherein the arc hole is opened along an arc centered on the axis of the electrode. 2. The component supply device for a projection welding machine according to claim 1, further comprising adjusting means for changing a relative position between the air cylinder and the supply rod.