JPH0380595B2 - - Google Patents

Description

Detailed Description of the Invention Technical Field The present invention relates to a double-headed friction welding machine that is symmetrically provided with a headstock for rotating materials on both sides of a clamping device for fixed materials. The present invention relates to a material transport device for transporting a material from a press-contact position.

Prior Art In the case of a double-headed friction welding machine, in which the rotating side workpiece, which is held by the chuck of the headstock and rotates at high speed, is simultaneously friction welded from both sides to the end face of the stationary side workpiece held by the clamp device, the stationary side workpiece is The width is determined and held so that the midpoint in the longitudinal direction (width) coincides with the midpoint between both headstocks, that is, the midpoint of the clamping device in the direction of the pressure welding axis (hereinafter referred to as the clamping center of the clamping device). It is desirable to However, in the past, the width of the fixed side material was determined by the operator's intuition, which resulted in a lack of reliability, and there were many cases where the material was held biased to either the left or right side. For this reason, regarding the feed speed of the headstock during friction welding, it is necessary to set the time to switch from rapid feed to slow feed early in consideration of the above deviation, and as a result, the cycle time of friction welding becomes longer. This has the disadvantage that the friction heat generation time varies, which adversely affects the bonding strength.

OBJECT OF THE INVENTION In view of the above-mentioned conventional drawbacks, an object of the present invention is to
To provide a material unloading device for a double-headed friction welding machine capable of determining the width of a fixed side material so that the longitudinal midpoint of the fixed side material to be held in a clamping device coincides with the clamping center of the clamping device. be.

Structure of the Invention The present invention comprises a clamping device for a stationary material fixed on a bed, and a rotating side which is arranged symmetrically on the bed with the clamping device in between and is slidable in the direction of the welding axis. A material carrying-out device for a double-headed friction welding machine equipped with a headstock for material, the carrying-out arm for carrying out the material is pressed against a support that is erected from the clamping device.The clamping center of the clamping device with respect to the axial direction. are disposed symmetrically with each other in between, and support the carrying-out arm so as to be rotatable in a direction transverse to the pressure welding axis, and to be movable toward and away from the welding axis along the pressure welding axis, and to allow said rotation and toward and away from each other. The feature is that a link mechanism and a driving means are provided for each.

Embodiments Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. As shown in the figure, approximately in the center of the bed 1 is a pair of clamp claws 2 that hold the fixed side material W1.
A clamping device 3 with Each of them is adapted to be reciprocated in the direction of the pressure welding axis by a thrust cylinder (not shown).

At the rear end of the clamping device 3, a support 6 made up of two opposing plates is erected, and on both sides of the support 6, left and right carry-out arms 7 for carrying out the material are connected to the clamping device with respect to the pressure welding axis. They are arranged symmetrically across the center of the clamp No. 3 and at intervals wider than the length of the fixed side material W1. Both carry-out arms 7 are formed into a substantially L-shape, and
The upper end portion thereof is attached to a support shaft 9 rotatably supported by a bearing 8 formed on the upper portion of the support column 6 so as to be slidable in the axial direction. That is, the carry-out arm 7 is rotatable in a direction transverse to the pressure welding axis and horizontally movable in a direction parallel to the pressure welding axis.
The lower part of the carry-out arm 7 is carried out almost horizontally toward the pressure welding axis side, and the tip part has a flat plate shape for carrying out the welding material after friction welding to the material receiver 10 provided at the front end of the clamping device 3. It is equipped with a carrier 11. The carrier 11 is inserted into a groove formed at the tip of the carry-out arm 7, and
The tip side is rotatably supported by a pin 12,
The lower surface of the rear end side is supported by a stopper pin 13. In addition, the upper surface of the carrier 11 is formed in an inverted shape to receive and discharge the material at the press-contact position, and the mooring piece 50 provided on the inner surface of the carrier 11 is attached near the end of the material discharging operation. It can come into contact with mooring stoppers 14 protruding from both sides of the front end of the clamp device 3.

A carry-out cylinder 16 for reciprocating the carry-out arm 7 is fixed vertically to the rear side of the top plate 15 of the column 6, and a piston rod 17 penetrating through the top plate 15 and hanging down is for the carry-out arm. supporting shaft 9
It is connected via a link 19 to an interlocking lever 18 that is fixed to the central part of and projects rearward. Further, a width determining cylinder 20 for horizontally reciprocating the carry-out arm 7 is vertically fixed to the front side of the top plate 15, and an interlocking block 22 is provided on the piston rod 21 penetrating the top plate 15 and hanging down. There is. The interlocking block 22 is fitted between upper and lower flanges 23 provided on the piston rod 21 so as to be movable up and down, and is held upwardly by a compression spring 24, and is opposed to the left and right unloading arms 7. It is connected to the carry-out arm 7 via a link mechanism for horizontal movement (approaching/separating). That is, each bracket 25 protruding from both sides of the upper part of the support column 6 has a pair of front and rear shift levers 26 each having an engagement pin 28 at the lower end thereof, which can be rotated by a common pin 27 so as to form a bifurcated shape. The engaging pins 28 of the shift levers 26 are fixed to the upper end of the carry-out arm 7 and engaged with annular grooves 30 of a connecting ring 29 that is slidable on the support shaft 9. One of the pair of shift levers 26 is formed in the shape of a bell crank, and is connected to the interlocking block 22 via a link 31.

This embodiment is configured as described above,
The effect will be explained below. As shown by the solid line in FIG. 2, the unloading arm 7 is waiting at a width determining position where its lower tip side is held on the pressure welding axis, and in this state, both unloading arms 7 are wider than the length of the fixed side material W1. maintained at intervals. In this state, the stationary workpiece W1 is attached to the clamp device 3, and the rotating workpiece W2 is attached to the chuck 4 of both headstocks 5, but at this time, the stationary workpiece W1 is temporarily held by the clamp claw 2. , that is, it is maintained in a state where movement in the axial direction is permitted.

Thereafter, when the width determining cylinder 20 is operated in a direction to pull up the piston rod 21, as the interlocking block 22 rises, the left and right unloading arms 7 are horizontally moved toward each other via the shift lever 26 and the interlocking ring 29. Because of the movement, the carry-out arms 7 come into contact with the end surfaces of the fixed-side material W1 that is temporarily held. That is, the fixed side material W1 is corrected so that its longitudinal midpoint coincides with the clamping center of the clamping device 3, and its width is determined. In this case, the operating force of the width determining cylinder 20 is transmitted to the carry-out arm 7 via the compression spring 24, so even if there is some variation in the length of the material, the variation is absorbed by the compression spring 24. Ru.

When the width determination is completed in this way, the width determination cylinder 20 is operated to move the piston rod 21 downward, and the left and right carry-out arms 7 are separated. Next, the unloading cylinder 16 is connected to the piston rod 17.
Since it is operated in the direction of pulling up the interlocking lever 1
8, the left and right carry-out arms 7 are rotated to a retreat position shown by two-dot chain lines in FIG. 2, and stand by at that position. In this state, the fixed side material W is held by the clamp claw 2 of the clamp device 3.
1 is held securely, and then the rotation of both rotating side materials W1 held by the chuck 4, the advancement of both headstocks 5, etc. are performed in sequence, and a predetermined friction welding is performed. In addition, in order to save cycle time, the headstock 5 is advanced by rapid traverse for approaching the material and slow traverse just before contacting the material, but as described above, the width of the fixed side material W1 is determined. By eliminating this deviation, it becomes possible to determine the timing for switching from the rapid feed to the slow feed just before the two materials W1 and W2 come into contact, thereby reducing loss time.

When the friction welding is completed, the unloading cylinder 16 is actuated in a direction to push down the piston rod 17, and the unloading arm 7 is operated via the interlocking lever 18.
is rotated forward, and the pressure welding material W is released from being held by the chuck 4 and the clamp device 3.
1, W2 is scooped up by the upper surface of the carrier 11, but at that time, the mooring piece provided on the inner surface of the carrier 11 comes into contact with the mooring stopper 14.
Thereafter, as the carry-out arm 7 is further rotated, the carrier 11 is tilted forward, and as a result, the pressure welding material W
1 and W2 roll on the upper surface of the carrier 11 and are carried out to the material receiver 10 (see the one-dot chain line in FIG. 2).

When the unloading of the pressure welding materials W1 and W2 is completed in this manner, the unloading arm 7 is rotated rearward by the reverse operation of the unloading cylinder 16, and is stopped at the width determining position shown by the tangent line in FIG. Prepare for the next width determination operation.

Effects of the Invention As described above, according to the present invention, in a double-headed friction welding machine, the width of the stationary side material can be determined so that the midpoint in the longitudinal direction of the material coincides with the clamp center of the clamping device, so that The cycle time can be shortened by setting the feed to the minimum required time, and since the width determining action is performed using the material unloading device, compared to the case where a special width determining device is installed. It is effective in shortening cycle time with less operational loss time, and
It is also effective in reducing equipment costs.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a front view, FIG. 2 is a partially cutaway side view, FIG. 3 is a sectional view taken along the line - in FIG. 1, and FIG. 4 is taken along the line - in FIG. 2. FIG. 1... Bed, 3... Clamp claw, 5... Headstock, 7... Unloading arm, 11... Carrier, 1
4... Mooring stopper, 16... Cylinder for carrying out,
20... Cylinder for width determination.

Claims (1)

[Claims] 1. A clamping device for the stationary side material fixed on the bed, and a headstock for the rotating side material that is arranged symmetrically on the bed with the clamping device in between and is slidable in the direction of the pressure welding axis. A material carrying-out device for a double-headed friction welding machine equipped with a material carrying-out arm for carrying out the material is mounted on a column erected from the clamping device symmetrically across the clamping center of the clamping device with respect to the pressure-welding axial direction. and a link mechanism and a drive for rotating and moving the unloading arm toward and away from each other along the welding axis. A material conveyance device for a double-headed friction welding machine, characterized in that each means is provided.