JPH0719675Y2 - Positioning device for workpieces - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a work positioning device for fitting and positioning the open end surfaces of a pair of bottomed work pieces (hereinafter referred to as work pieces) so as to face each other.

[Conventional technology]

As shown in FIG. 3, when the open end surfaces of a pair of bottomed work pieces 1 and 2 face each other and the open end surfaces of one work piece 2 are fitted inside the open end surface of the other work piece 1, 1,
In many cases, due to the variation in the processing accuracy, the pressing cannot be done by the clamp member 3 alone. That is, as shown in FIG. 4, one work 1 is supported on a support base 4, the other work 2 is placed on the work 1 with their open end faces facing each other, and is pressed in the direction of arrow A by the clamp member 3. Then, even if one side surface of the work 2 enters the work 1, the other side surface may interfere and not be fitted.

For this reason, conventionally, as shown in FIG. 5, the work 1 indicated on the support base 4 is fixed to the support base 3 by a pair of side clamp members 5. An inclined surface 6 that guides the open end surface of the work 2 is formed on the upper portion of the side clamp member 5, the horizontal end portion 7a of the stepped portion 7 holds the open end surface of the work 1 inside the lower portion of the inclined surface 6, and the vertical portion 7b forms the work piece. The outer circumference of No. 1 was pressed. Then, the clamp member 3 presses the work 2 in the direction of the arrow A to lower the open end surface of the work 2 along the inclined surface 6 of the side clamp member 5 and fit the inner surface of the work 1.

[Problems to be solved by the device]

However, in the positioning means shown in FIG. 5, if the pressing force of the clamp member 3 is excessively increased, the workpieces 1, 2
Could be deformed. Further, due to the frictional resistance between the work 2 and the inclined surface 6 of the side clamp member 5 and the inclusion of the spatter 8 generated during welding, the work 2 may not be fitted into the work 1 with the clamp member 1. . Therefore, there is a problem in that welding defects such as burn-through and welding line deviation in arc welding and operation stop of the welding machine due to defective fitting occur.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a work positioning device capable of easily fitting the open end faces of a pair of bottomed work pieces.

[Means for Solving the Problems]

In order to achieve the above object, the present invention grasps a pair of bottomed work pieces concentrically and with their open end faces facing each other by a pair of upper and lower clamp members and a plurality of side clamp members, A work positioning device for inserting the open end of one work inside the open end of the other work,
The pair of upper and lower clamp members and the plurality of side clamp members are each formed of a conductive material, a coil is wound around a part of each clamp member, and an electromagnetic magnet is formed by energizing the coil, An inclined surface that guides one of the arms is formed on the upper portion of the side clamp member, and a protrusion that abuts the outer circumference of the other workpiece is provided on the lower portion.

[Action]

According to the above configuration, by energizing the coils respectively wound around the pair of upper and lower clamp members, the open ends of the pair of works contacting these clamp members have the same polarity, for example, N pole. Further, by energizing the coil wound around the side clamp member, the inside of the inclined surface is N
The pole may be a pole and the tip of the protrusion may be an S pole. In this state, one of the workpieces that is in contact with the upper clamp member has the same polarity as the inside of the inclined surface of the side clamp member and repels,
It can be made non-contact, friction resistance is eliminated, and it can be easily fitted into the other work. Further, since the open end of the other work and the inclined surface have the same polarity, they repel each other and come into close contact with the lower clamp member of this work.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show an embodiment of the present invention. In FIG. 1, parts that are the same as or equivalent to those in the conventional example shown in FIG.

Similar to the conventional example, the first work 1 is supported on a support base 4 which is a lower clamp member with its open end face facing upward. On the outer circumference of the first work 1, a pair of side clamp members 5 is driven in the direction of arrow B by a driving means (not shown).
Is provided. An inclined surface 6 is formed at the upper end of the side clamp member 5, and a protrusion 9 is provided inside the lower portion of the inclined surface 6. A recess 10 is formed between the inclined surface 6 and the protrusion 9, and the first coil 11 is formed in the recess 10.
Is wound.

On the other hand, the second work 2 is mounted so as to face the open end surface of the first work 1, and the open end surface of the second work 2 is guided by the inclined surface 6 of the side clamp member 5. A second coil 12 is wound around the outer periphery of a clamp 3, which is an upper clamp member that press fits the second workpiece 2 into the first workpiece 1, and similarly, a second coil 12 is wound around the outer periphery of the support base 4. Three coils 13 are wound. The clamp 3, the support base 4, and the side clamp member 5 are each made of a conductive material.

In addition, both poles of the first, second and third coils 11, 12, 13 are second poles.
The second coil, which is connected to the power supply 14 as shown
By energizing 12, the open end surface of the second work 2 becomes the N pole via the clamp 3. Similarly, by energizing the third coil 13, the open end face of the first work 1 becomes the N pole via the support 4. Further, by energizing the first coil 11, the tip of the inclined surface 6 of the side clamp member 5 becomes the N pole and the tip of the protrusion 9 becomes the S pole.

Next, the operation of this embodiment will be described.

The first work 1 is placed on the support base 4, and the pair of side clamp members 5 are rotated in the direction of arrow B by a driving means (not shown) to press and fix the first work 1 with the projection 9. Next, the second work 2 is pushed by the clamp 3 in the direction of the arrow A and brought into contact with the inclined surface 6 of the side clamp member 5. Next, when the power supply 14 is turned on and the coils 11, 12, and 13 are energized to generate magnetic force, the first work 1 becomes the side clamp member 5
The width is determined by the protrusion 9 of the first work 1, and at the same time, the N pole of the open end surface of the first work 1 and the inclined surface 6 of the side clamp member 5
The first work 1 is pressed against and closely adhered to the support member 4 by repulsion of the N pole at the tip of the first work 1.

On the other hand, the N pole of the open end surface of the second work 2 and the N pole of the tip of the inclined surface 6 also repel each other, and there is no contact between them, and friction resistance is lost, and the open end surface of the second work 2 is an inclined surface. It smoothly descends along 6 and fits easily into the inner circumference of the first work 1. At this time, the spatter 8 on the inclined surface 6 can be removed by magnetic force. When the positioning clamps for the workpieces 1 and 2 are completed, turn off the power supply 14, turn off each coil 11,
Stop energizing 12, 13 and start welding.

According to this embodiment, the works 1 and 2 can be fitted smoothly with a small force, and the occurrence of welding defects and fitting defects can be prevented.

The polarities of the electromagnetic magnets of the respective parts in the above embodiment may be all reversed, and the same effect can be obtained. Further, the drive source of the clamp 3 does not need to use hydraulic pressure and may be air. In this case, there is an effect that a fire can be prevented.

[Effect of device]

As described above, according to the present invention, since the inclined surface of the side clamp member and the open end surface of the work are brought into non-contact with each other by the electromagnetic force, the fitting of the pair of works can be smoothly and accurately performed with a small force. It is possible to prevent the occurrence of welding failure and fitting failure.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is an explanatory view showing the operation of this embodiment, FIG. 3 is a perspective view showing a conventional work positioning device, and FIG. 4 is the same operation. FIG. 5 is a front view of a main part of another conventional work positioning device. 1,2 …… Workpiece (workpiece to be welded), 3 …… Clamp, 4 ……
Support base (clamp member), 5 ... Side clamp member,
6 ... Inclined surface, 8 ... Spatter, 9 ... Projection, 11, 12, 13
…… Coil, 14 …… Power supply.

Claims (1)

[Scope of utility model registration request] 1. A pair of upper and lower clamp members and a plurality of side clamp members hold a pair of bottomed objects to be welded concentrically with their open end faces facing each other, and to weld one of them. A positioning device for a workpiece to be inserted, wherein the open end of the article is inserted inside the open end of the other workpiece, wherein the pair of upper and lower clamp members and a plurality of side clamp members are each formed of a conductive material, A coil is wound around a part of each clamp member to energize the coil to form an electromagnetic magnet, and an inclined surface for guiding one workpiece to be welded is formed on an upper portion of the side clamp member. A positioning device for an object to be welded, characterized in that a protrusion that abuts the outer periphery of the other object to be welded is provided.