JPH0318086Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a jig for machining cylindrical workpieces.

[Conventional technology]

Conventionally, when machining cylindrical workpieces using NC lathes, etc., the workpiece was
The other end was held up from the inside of the tailstock, and the other end was fixed by the center of the tailstock for cutting off or chamfering the inner and outer diameters.

[Problem that the invention attempts to solve]

However, in the above-mentioned conventional technology, when it is desired to machine both ends of a cylindrical workpiece, for example, one side (the tailstock side in relation to the collect chuck) is first machined, and in order to machine the other side, the tailstock is moved from the cylindrical workpiece. It was necessary to separate the cylindrical workpiece from the chuck, invert the cylindrical workpiece, hold the machined end face in the collect chuck, press it with a tailstock, and then perform processing such as cutting off. In this way, it took time to remove and set up each time, and it was also dangerous and the work efficiency was poor. Furthermore, since the workpiece is held only by the collection chuck, it is unstable for long workpieces, and the workpieces that can be used are limited to some extent.

In addition, when attaching and detaching a cylindrical workpiece, the tailstock center retraction distance is required to be at least twice that of the cylindrical workpiece, so the floor space of the machine tool is inevitably increased, which is uneconomical. It was hot.

The present invention was proposed in view of the above circumstances, and it uses a simple device to machine both ends of a cylindrical work piece in sequence, regardless of its length, without having to re-set the work piece. Cylindrical workpieces can be attached and detached during the process, and can be automatically done in the machine in a short period of time, resulting in high work efficiency and safety, thus improving productivity. The purpose is to provide processing jigs for.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention has a housing that is connected to the main shaft, has a center inserted inside the main shaft side, and has a horizontal groove inside the tip, and one end that fits into the horizontal groove of the housing and is positioned within a horizontal plane. A swinging member that is angularly swingable and has a conical bulge at one end and whose other end extends into the holding member; a pressing member having a conical bulge facing the bulge; and a cylindrical workpiece having a conical inner diameter at both ends and having a plurality of slits carved in the axial direction. a holding member for positioning the swinging member on the axis or for positioning the swinging member at that position when the swinging member is swung at a predetermined angle; The jig for machining a cylindrical workpiece is characterized by comprising a biasing means interposed inside a holding member.

[Effect]

The oscillating member and the pressing member are separated by the biasing means, the cylindrical work holding member is contracted in the radial direction, and the oscillating member is oscillated at a predetermined angle from the spindle axis to the positioning means. Twist and secure in that position. Thereafter, the cylindrical workpiece is loosely inserted into the cylindrical workpiece holding member, and the swinging member is moved along the original spindle axis. When the pressing member is pressed by the tailstock center or the like, the cylindrical work holding member expands in the radial direction to hold the cylindrical work.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in more detail based on the drawings.

FIG. 1 shows an overall plan view of a machine tool in which the jig for machining cylindrical workpieces of the present invention is used, and FIG. 2 shows a vertical cross-sectional view of the jig for machining cylindrical workpieces. 3
The figure shows a view taken in the direction of the arrows in FIG. 2, and FIG. 4 shows a - sectional view taken in FIG. 2.

In FIG. 1, there is a spindle drive mechanism 2 on the left side of a machine tool 1, and a tailstock center 3 that is movable in the Z-axis direction is mounted on the opposite side of the spindle drive mechanism 2 on the spindle axis.

A robot 4 is provided in the vicinity of the spindle drive mechanism 2, and a raw workpiece conveyance path 5 and a processed workpiece conveyance path 6 separately provided on the left and right sides of the robot 4 are connected to the spindle side center 8 and the center. The cylindrical workpiece is machined by repeating rotation, rocking, back and forth movements, etc. in accordance with the instructions between it and the jig 7 for machining the cylindrical workpiece supported by the push platform center 3.
Attachment and detachment of KW is performed automatically.

Next, the jig 7 for machining a cylindrical workpiece will be explained.

As is clear from FIGS. 2 to 4, the cylindrical workpiece machining jig 7 includes a housing 9, a swinging member 10, and a mandrel 1 which is a cylindrical workpiece holding member.
1, a pressing member 12, etc. The cylindrical workpiece W is held by the mandrel 11 from the inside.

The mandrel 11 is formed into a substantially cylindrical shape, has a slit formed in the axial direction, and can be expanded or contracted in the radial direction.

Both ends of the mandrel 11 are formed into conical shapes 11a and 11b that are wider on the outside, and engage with inclined surfaces 10a and 12a of the conical portions formed on parts of the swinging member 10 and the pressing member 12, respectively. In addition, a protruding piece 11a in the radial direction is provided at the center inner diameter part of the mandrel 11.
are provided to support springs 13 and 14, which are biasing means that are wound around the swinging member 10 and biasing the swinging member 10 and the pressing member 12 outward.

A swinging member 10 is attached to the left side (main shaft side) of the inner diameter conical portion at both ends of the mandrel 11 via a housing 9.
However, on the right side (tailstock center), the pressing member 12 is fitted in such a manner that its inclined surfaces engage with each other and are slidable in the axial direction.

Among these, the swinging member 10 is formed into a substantially cylindrical shape as a whole, and becomes narrower in diameter from the conical part that is engaged and fitted into the conical part of the mandrel 11 and moves inside the recording mandrel 11 toward the pressing member 12 on the right side. inserted. A horizontal groove 10a parallel to the axis is provided at the distal end of the loosely inserted swinging member 10, and a long hole 10b is provided at a portion of the distal end.
is engraved.

The main axis side of the conical part of the swinging member 10 has a plate-shaped protrusion 10c parallel to the axis, and is swingable in a horizontal plane within a horizontal groove 9a parallel to the axis provided in the housing 9. It is embedded. A long hole 10d is formed in the axial direction at the tip of this plate-shaped protrusion 10c, and engages with a fixing pin 15 implanted at the tip of the housing 9.

The housing 9, which is connected to the swinging member 10 by a fixing pin 15, has a horizontal groove 9a formed at its tip and a tapered hole at its inner diameter rear portion. The center 8 is inserted into this tapered hole. The housing 9 is fixed to the main shaft 16 and can rotate integrally therewith.

In order to swing and position the swinging front member 10 fitted into the horizontal groove 9a at the tip of the housing by a predetermined angle α°, two through-holes are cut from the outer diameter of the tip toward the horizontal groove 9a. . On the other hand, a steel ball 17 and a spring 1 are inserted into the threaded hole in order to engage and press the V-notch groove carved in the upper part of the protrusion 10c of the swinging member 10.
8 is interposed and set by set bolts 19 and 20 to constantly urge the steel ball 17 downward. These constitute the positioning means 21.

The tip of the pressing member 12 fitted into the conical portion at the right end of the mandrel 11 forms a protruding portion 12b having a flat surface in the horizontal direction, and is fitted into the horizontal groove 10a at the tip of the swinging member 10. . A pin 22 is implanted in a part of the top surface of the tip of this pressing member 12, and this pin 22 engages with a long hole 10b carved in the swinging member 10, and the swinging member is biased by a spring 14. 10 and the pressing member 12 are restricted from moving away from each other.

Note that a center hole is formed in the rearmost surface of the swinging member 10 and the rearmost surface of the pressing member 12, so that the center 8 on the main shaft 16 side and the tailstock center 3 are engaged with each other. It's summery.

Next, the operation of the present invention configured as described above will be explained.

First, the jig 7 for machining a cylindrical workpiece is swung by a predetermined angle .alpha..degree. from the spindle axis, positioned, and kept on standby. At this time, the mandrel 11 is connected to the spring 13,
14, the swinging member 10 and the pressing member 12 are moved away from each other in the left and right directions, so that they are contracted in the radial direction.

The robot 4 grips the unprocessed cylindrical workpiece W that has been transported to the unprocessed workpiece transport path 5, and moves the cylindrical workpiece processing jig 7 that is waiting for the cylindrical workpiece to be processed. Bring it on the axis. The cylindrical workpiece W is loosely inserted into the cylindrical workpiece processing jig 7 by moving the robot arm 4a in the direction of arrow S.

Thereafter, the jig 7 for machining the cylindrical work is positioned on the axis of the main spindle by swinging by α°.

The tailstock is advanced and the pressing member 12 is pressed and fixed at the tailstock center 3. The mandrel 11 engaged with the inclined surfaces of the pressing member 12 and the swinging member 10 expands in the radial direction and is loosely inserted into the cylindrical workpiece.
Hold the cross W from the inside diameter.

The grip on the robot arm 4a is released and the robot arm 4a is retracted from the cylindrical work W.

Next, the main shaft 16, the cylindrical workpiece W, etc. are rotated by the main shaft drive mechanism 2, and a cutting tool (not shown) is used to cut off the machining positions a and b, for example.
Next, use a chamfering tool to chamfer the inner and outer diameters.

In this way, if the processing positions a and b are determined outside the conical bulge of the swinging member 10 and the conical bulge of the pressing member 12, which are the holding positions of the cylindrical workpiece W, Machining at position b can be performed continuously following position a.

When the predetermined machining is completed, the rotation of the cylindrical workpiece W is stopped, and the robot arm 4a of the robot 4 is swung from the standby position to above the cylindrical workpiece W to grasp the cylindrical workpiece W. Next, the robot arm 4a moves the cylindrical workpiece W toward the tailstock center 3, disengages the swinging member 10 from the center 8 on the main shaft 16 side, and sets it with the set bolt 19.

After that, the tailstock center 3 is retracted. By the operation opposite to the above, the mandrel 11 is contracted in the radial direction, and the holding force of the mandrel 11 against the cylindrical workpiece W is released. Next, each cylindrical workpiece machining jig 7 is swung by a predetermined angle .alpha..degree. by the robot arm 4a and positioned using the set bolt 20.
Following the reverse operation described above, the cylindrical workpiece W is pulled out from the mandrel 11 in the direction of arrow S, and the processed workpiece is removed.
6. Place it on the transport path.

The above operations are repeated, but as can be seen from the above, in the present invention, the cylindrical workpiece is swung by the robot using a fixed pin as a fulcrum, so when the cylindrical workpiece is attached or detached, the tailstock center is This has the advantage of requiring a short retraction distance and requiring less floor space for the machine tool. Further, the work of attaching and detaching the cylindrical workpiece can be done automatically and easily within the machine. Furthermore, by providing a conveyance path for unprocessed cylindrical workpieces and a conveyance path for processed cylindrical workpieces, the burden on the worker is reduced by eliminating the need for workers to carry in and remove cylindrical workpieces. It became possible to process cylindrical workpieces continuously.

[Effect of idea]

According to the present invention, since the cylindrical workpiece is attached and detached while the oscillating member is oscillated at a predetermined angle, the retraction distance of the tailstock center is short, and therefore,
It has become an economical machine tool that takes up little floor space. In addition, the work of attaching and detaching cylindrical workpieces can now be done automatically, easily, in a short time, and moreover, inside the machine, reducing the burden on the operator. Furthermore, since the cylindrical workpiece is held from the inside at both ends, it has become possible to continuously process both ends.

Therefore, it has become possible to provide a highly productive jig for machining cylindrical workpieces that can achieve the above-mentioned effects.

[Brief explanation of drawings]

FIG. 1 shows an overall plan view of a machine tool in which the jig for machining cylindrical workpieces of the present invention is used, FIG. 2 shows a vertical cross-sectional view of the jig for machining cylindrical workpieces, and FIG. The figure shows the arrow view in Fig. 2, and Fig. 4 shows the arrow view in Fig. 2.
- shows a sectional view in the figure. 1...Machine tool, 3...Tailstock center, 4...
...Robot, 7...Jig for processing cylindrical workpieces, 9
... Housing, 10 ... Swinging member, 11 ... Mandrel (cylindrical work holding member), 12 ... Pressing member, 13, 14 ... Spring, 15 ... Fixing pin,
17... Steel ball, 18... Spring, 19, 20... Set bolt, 21... Positioning means.

Claims (1)

[Scope of utility model registration request] A housing that is connected to the main shaft, has a center inserted inside the main shaft side, and has a horizontal groove inside the tip, and one end fits into the horizontal groove of the housing and can swing at a predetermined angle in the horizontal plane, with a part shaped like a cone. a swinging member having a bulge and the other end extending into the holding member; and a swinging member connected to the swinging member and facing the conical bulge of the swinging member. A pressing member having a conical bulge, a cylindrical work holding member having a conical inner diameter at both ends and having a plurality of slits carved in the axial direction, and a cylindrical work holding member having a conical bulge on the axis. a positioning means for positioning the swinging member and the pressing member in the axial direction, and a biasing means interposed inside the holding member to move the swinging member and the pressing member away from each other in the axial direction; A jig for machining cylindrical workpieces, characterized by comprising: