JPH0125645B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention is applicable to lathes, grinding machines, etc., when the workpiece is rotated by engaging a part of the workpiece or a drive pin with a burr attached to the workpiece. It is desirable that the two contact each other beforehand. There is no particular problem when a worker manually attaches and detaches a workpiece, but when a robot or a loader automatically attaches and detaches a workpiece, the mounting position of the workpiece becomes a problem.
That is, angular positioning of the spindle and the workpiece is required, and the accuracy of this positioning is a problem, and in order to increase the accuracy, the mechanism becomes complicated and expensive.

Purpose: Therefore, the present invention has been made in view of the above, and it is possible to mount a workpiece with coarse positioning without requiring highly accurate angular positioning, and to drive the drive body of the main spindle before rotating the main spindle to move a part of the workpiece or the workpiece. An object of the present invention is to provide a drive preparation device for a workpiece that brings a burr attached to a drive pin into contact with a drive pin.

Means for Solving the Problems The first invention includes a drive body that is rotatably supported on a main body provided with a center and has a drive pin implanted at its front end that can engage with a workpiece or a burr attached to the workpiece. , a cam body that is slidably interposed inside the drive body and has a cam on its outer periphery with a lead that engages with the drive body cam engagement member; and an operation that is inserted into the center of the main shaft and moved in the axial direction. The device includes a rod and a member that slidably penetrates the wall of the main body and connects the operating rod and the cam body.

The second aspect of the present invention is the first aspect of the present invention in which a pin is provided on the end face of the cam body to engage the drive body in the forward position.

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. The main body 2 fitted onto the tip of the main shaft 1 is cylindrical and has a boss 2b protruding from the center of the end face 2a, and a center 3 is provided concentrically with the main shaft 1 at the center thereof, either integrally or removably. A concentric groove 2c is cut in the outer periphery of the end face 2a, and a cylindrical drive body 4 is rotatably supported in the groove 2c and on the boss 2b while being restrained in the axial direction. A drive pin 5 is implanted in the end surface 4a of the drive body 4 in parallel to the main shaft at a position away from the center, and a pin 6 is provided in the cylindrical portion that projects inward toward the center. A cam body 7 is slidably interposed between the cylindrical part of the drive body 4 and the boss part 2b of the main body 2, and a part of the main shaft side is parallel to the main shaft on the outer periphery of the cam body 7, and a part of the main shaft side is parallel to the main shaft. A cam groove 7a having a diameter is cut into contact with the cam groove 7a, and the tip of the pin 6 of the drive body 4 is engaged with this cam groove 7a. Also, the cam body 7
A fixing pin 8 is installed on the front end face at a position apart from the center and parallel to the main shaft, and the main shaft of the cam groove 7a is inserted into the hole 4b bored inside the end face 4a of the drive body 4 when the cam body 7 is in the forward position. The cam body 7 and the drive body 4 are connected integrally by fitting in the parallel portion. At the center of the main shaft 1, a connecting plate 10 loosely mounted inside the main body 2 is fixed to the tip of an operating rod 9 connected to a piston of a cylinder device (not shown). The movement of the operating rod 9, which is integrally connected by a push rod 11 slidably fitted into the hole 2b in the wall of the end surface 2a of the main body 2, directly becomes the movement of the cam body 7, and the main body 2 The rotation of the cam body 7 is as it is.
The rotation is made as follows.

Function In this configuration, the operating rod 9 is advanced by the action of a cylinder (not shown), and the cam body 7 is at the forward end via the connecting plate 10 and the push rod 11, and the fixing pin 8 is fitted into the hole 4b of the driving body 4. In this state, rough angular positioning is performed, and the operating rod 9 is pulled by the reverse action of the cylinder, causing the cam body 7 to retreat. As a result, when the fixing pin 8 and the driving body 4 are disengaged, the driving body 4 is rotated by the lead distance by the grooved cam 7a. In this state, the workpiece to which the burr 12 is attached is conveyed between the center 3 and the center of the tailstock shaft (not shown), and the burr 12 is removed within the angle at which the drive pin 5 is rotated by the groove cam 7a.
It is roughly positioned so that the engagement point is located and gripped at both centers. Next, the operating rod 9 is moved forward, and the connecting plate 10 and push rod 11 move the cam body 7 forward. The pin 6 engaged with the lead part of the grooved cam 7a
The drive body 4 is rotated via the. For this reason, the driving pin 5 comes into contact with the burr 12 of the workpiece and rotates the burr 12 while being in contact with it. Fixed pin 8 at the forward end of the cam body 7
is fitted into the hole 4b of the drive body 4 and integrated, and the drive pin 5 is brought into contact with the cutout 12. When the main shaft 1 is rotated in this state, the rotation is transmitted to the main body 2, push rod 11, cam body 7, fixing pin 8, and drive body 4, and the workpieces are rotated at the same time.

Effects of the Invention As detailed above, the present invention enables the main spindle and the angular positioning of the robot, loader, etc. that carries the workpiece to be carried in, even if the angle positioning is not carried out precisely, as long as it is positioned within a certain range. As a result, the angular positioning mechanism has a simple structure, which reduces costs and also makes it easily adaptable to automation.

[Brief explanation of drawings]

FIG. 1 is a front view of the present invention, FIG. 2 is a sectional view taken along the line -- in FIG. 1, and FIG. 3 is a diagram showing a grooved cam. 2... Main body, 4... Drive body, 5... Drive pin,
6... Pin, 7... Cam body, 7a... Groove cam, 8
...Fixing pin, 9...Operation rod, 11...Push rod,
12... Kere.

Claims (1)

[Claims] 1. A drive body rotatably supported by a main body provided with a center and having a drive pin implanted at its front end that can engage with a workpiece or a burr attached to the workpiece, and an inner side of the drive body. a cam body that is slidably interposed and has a cam on its outer periphery with a lead that engages with a cam engaging member of the drive body; an operating rod that is inserted through the center of the main shaft and is moved in the axial direction; a member that slidably penetrates a wall and connects the operating rod and the cam body; Or a drive preparation device for a workpiece, which is characterized by locking a burr attached to the workpiece. 2. A drive body rotatably supported by a main body provided with a center and having a drive pin implanted at its front end that can engage with a workpiece or a burr attached to the workpiece, and a slidably interposed device inside the drive body. a cam body having a cam with a lead on its outer periphery that engages with a cam engaging member of the driving body, and a pin that locks with the driving body in a forward position;
comprising an operating rod that is inserted through the center of the main shaft and moved in the axial direction, and a member that slidably penetrates the wall of the main body and connects the operating rod and the cam body;
A drive preparation device for a workpiece, characterized in that, before rotationally driving the workpiece, the drive body is rotated by the cam to engage the drive pin and the workpiece or a burr attached to the workpiece.