JPS6020833A - Machine tool - Google Patents

Abstract

PURPOSE:To simplify positioning and lower price by allowing a locator fixed onto a main-sindle holding body to restrict the locate pins arranged at equal pitches in a tool magazine through the relative transfer between a holding body and the tool magazine. CONSTITUTION:A main spindle head 15 is transferred up to a prescribed height according to a tool replacement instruction and shifted with a slidable base 14 in the direction of a magazine 20. During this time, the magazine 20 dividing-revolves and directs the vacant notched part 22 in Y direction, and when the slidable base 14 and the main spindle head 15 are transferred until a holder H is inserted, the magazine stops. Then, also a locator 18 shifts and is inserted between locate pins 21, and a main spindle 16 is positioned onto the notched part 22, and the revolution of the magazine 20 is locked. Then, the main spindle head 15 is raised, and a tool T after use is accommodated into the magazine 20. Then, the slidable base 14 is shifted to release the engagement between the locator 18 and the pins 21, and the holding notched part 22 for a prescribed tool is directed towards the main spindle 16 side through the revolution of the magazine 20, and the slidable base 14 is inserted between the locator 18 and the pins 21, and the main spindle 16 is inserted into the holder H, and working is started after clamping.

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to a machine tool equipped with a tool magazine.

In particular, a machine tool is equipped with a tool magazine indexing and positioning device 1τ.

[Technical background of the invention and its problems]

Eri 1. Like a machining center. magazine i11
For machine tools with 1 degree, the device 1 degree 11 selects the required tool from the tool magazine and automatically attaches it to the spindle.

Usually, an ATC (automatic tool changer) is used.

That is, the tool magazine is indexed based on the tool selection command signal, (? Move, grip the required tool, and machine the spindle ↓.

The tool is transported to the mounting position and the tool is clamped onto the tool flange of the spindle. When returning a used tool from the spindle to the tool magazine, the tool is replaced by using the ATO and performing the opposite operation to that described above.In this way, in conventional machine tools, the ATO is used to return the tool to the tool magazine. Tools are exchanged between the main shaft and the main shaft, and the provision of the ATC complicates the structure and increases costs. Furthermore, in order to accurately select a required tool, it is necessary to accurately perform indexing and positioning of the tool magazine, and the drive and control mechanism for the tool magazine is also complex and expensive.

[Purpose of the invention]

The present invention has been made in consideration of these points.
To provide a machine tool equipped with a tool magazine indexing and positioning device capable of simply and easily indexing and positioning a tool magazine.

[Summary of the invention]

The present invention is a machine tool equipped with a main spindle having a tool clamp part, a main spindle holder for attaching and holding the main spindle to a machine tool body, and a tool magazine having 3 MU tool storage f1'' parts. , a plurality of locating pins are arranged in the tool magazine at equal pitches corresponding to the arrangement pitch of the tool storage sections, a locator is fixed to the spindle holder, and the locator is located by relative movement of the spindle holder and the tool magazine. The feature is that the locate pin can be restrained by sliding in contact with the tone.

According to the present invention, when the main shaft holder and the tool magazine are moved relative to each other in order to move the main shaft 1ijl to a predetermined tool position: 'i-' among the tools stored in the tool magazine, , the locator restrains the locating pin and determines the final index of the tool magazine. As a result, the structure of the tool magazine indexing and positioning device can be simplified, and costs can be significantly reduced.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing an embodiment of a machine tool equipped with a tool magazine indexing and positioning device according to the present invention, and FIG. It is a diagram.

The machine tool shown in Figure 1 is a vertical machining center.
A workpiece mounting table /2 and a vertical column /3 are mounted on the pet //, and a sliding table /'I that moves by ρ8 in the direction of the arrow Y is mounted on the top of the vertical column /3. A spindle head/3 is attached to the front end of the slide mount 17 so as to be slidable in the direction of the arrow X, and a tool consisting of a pot for holding a tool holder, a collet for a pull stud solenoid, etc. is attached to this spindle head/S. A shaft in which a main shaft 16 including a clamp portion is rotatably held. A bracket/g is installed vertically on the lower surface of the slide table/4Z, and a locator/g is fixed to the lower end of the bracket/7 so as to point in the direction of the arrow Y on the movement locus of the main shaft/6 in the direction of the arrow Y. . This locator /g has a tapered shape with a tapered tip, and the rear dimension is equal to the pitch interval t of the locator pin 2/ arranged in the tool magazine 2o, which will be described later. .

A tool magazine 3 is arranged near the side wall of the vertical column /3 with its axis of rotation A directed in the vertical i+'1 direction. As shown in FIG. D1 has an upper plate diameter smaller than the diameter of the holding plate 23, which is horizontally arranged and aligned with the holding plate 23 after a fixed interval of 1 yen, and is indexed and rotated by a drive motor (not shown). It is said that it is possible. On the upper surface of the upper sill plate q, the same number of locate pins 2 as the notches q are arranged circumferentially at equal intervals in the direction of the vertical 1. / is arranged in a relationship such that the center of the notch 22 is located on the center line of the interval between two adjacent locate pins, 2/.In addition, in FIG. 7, for simplicity of illustration, Only one locate pin 2/ disposed on the upper plate 2 is shown.A plurality of tool holders H are housed and held on the outer periphery of the holding plate 3 using notches n (in the drawing, two (Only the book tool holder is shown).The symbol T is a cutting tool held in the tool holder H.

Next, the operation of this embodiment having such a configuration will be explained.

During operation of the machining center 10, when a tool change command is issued, based on the command, the tool holder H, which is mounted on the main spindle 6 with the main head 1tii at a predetermined height, is moved to the holding plate 2. ? Notch part,! It moves in the X direction to a position where it can be inserted into 2), and then moves in the Y direction toward the tool, magazine, and 20 together with the slide table/4'. During this time.

The tool magazine J is indexed and rotated, and the empty notch 22 in which the tool holder H is housed and held is oriented in the Y direction. When the slide table /q and the main point head /S move in the Y direction until the tool holder H is completely inserted into the notch 22, RX? Stop the movement of IJ stand III. At this time, slide table/11. The locator /g attached to the tool magazine J also moves in the Y direction and is inserted between the locator pins / installed above the tool magazine J (Figure x shows the locator /g).
(g shows the state inserted between the locating pins).

By inserting the locator /g, the center of the main shaft /A, which is arranged on the same straight line as the locator /g, is accurately positioned on the center of the notch ju, and the locator /g
Since the width dimension is equal to the pitch distance l'i4t of the locate pin 2/, the eight movements in the rotational direction of the tool magazine 200 are controlled. In this way, after the tool magazine 20 is positioned and fixed by the engagement of the locator /g and the locate pin 2/, the main 1Ifl+head /S moves up in the X direction. As a result, the tool T used (1-f) remains in the tool manifold 1 non aθ together with the tool holder H and is stored and held.

Next, slide table //I is machined, 11, from magazine 20)
;Move 1f in the 5Y direction and disengage the 4th gear. Tool mag (non-roo) indexing rotation is performed, and the tool stops when the notch 〃, which stores and holds the predetermined tool J1, is at the same position in the X direction 4 on the main spindle/4 side. 1 motion/
q again, tool manoa, gin. Move in the Y direction so that it approaches 20, insert the locator/g between the rotor bins 27, and fix the locator, magazine, and 20 digits (").

Next, the spindle head/shank is lowered in the X direction, and the two-piece run section of the spindle/B is fitted into the D and O shank portions of the tool holder H, thereby clamping the tool holder I-1.

After the tool holder H ramps up, the 4-machining table/g moves in the Y direction away from the tool magazine 20, and the subsequent machining begins. This series of tool exchange operations.

It can be controlled using general sequence control techniques.

As described above, according to this embodiment, the index positioning and fixing operations of the tool magazine 20 are performed by inserting and engaging the locator/g between the locating pins 2/. 2 can be easily performed with a simple structure without using. Also, locator/g
Because the movement of the main spindle/B is carried out by the movement of the main spindle holder (sliding table/11.) that holds the main spindle/B on the machine tool body,
No special mechanism is required to move the locator/g. Furthermore, since the locator /g has a tapered wedge shape, even if there is some error in the indexing position of the tool magazine 3, it can be inserted between the locating pins 27, and by inserting and engaging it, it can be inserted accurately. Since the position is fixed, the indexing operation of the tool magazine J can be performed relatively roughly.

FIG. 3 is a diagram showing another embodiment of the present invention.

In the above-mentioned embodiment, the tool magazine has a rotating disk type structure. A similar effect can be obtained by using a chain arrangement type tool magazine as shown in FIG. i.e. λ sprockets), ? /a
、． ? A chain arrangement type tool magazine in which pots 33 for storing tool holders are attached at equal pitches to the chain 3- attached to the chain 3-b, and the chain 3.2 is moved to index and select tools. At 30, attach a sprocket to one Sujirocket J/a Ill, the same as J/a.
A rotating disk 3/I is placed on Ti1l #'A, and locate pins are placed at equal pitches on the circumference of this rotating disk 3,! / may be provided.

FIG. 9 is a diagram showing another embodiment of the present invention.

In the figure, the symbol θ is a tool magazine (), and like the tool magazine 20 shown in FIG. A holding plate 1-/I3 formed in a pinch and a holding plate 11. ,? An upper solate plate 11, which is smaller in diameter than the holding plate 1I-3, which is arranged coaxially and horizontally with the holding plate 1I-3, can be indexed and rotated by a drive motor. On the upper surface of the upper grate 4t, the same number of locate pinks as the notches lI2 are circumferentially arranged at equal pitches in the vertical direction. This locate pin 9/ is disposed on a conveying path connecting the center of notch erosion and the center of rotation of the tool MyF drill I10.

The track is a locator and is fixed to the lower end of the bracket /7 (see Fig. 1) which is vertically installed on the lower surface of the slide table /l. This locate pin has a wedge-shaped opening l with an open tip.
The opening 9Za has a semicircular portion 1Ipb having a diameter equal to the diameter of the locating pin formed at the rear of the opening 9Za.

According to this embodiment, which is based on the above-mentioned agreement, the locate pin I1.
l passes through opening 4+a of locator +p to semicircular part qqb
The locator pin 4'/ is inserted until the locator pin 4'/ is slidably engaged with the semicircular portion 1Ilb of the locator, and the locator pink/ is restrained and fixed. In this embodiment, locate pink/ is guided by the inclined surface of opening +fa and locates locator 1I.
Because it engages with tool magazine q0, even if there is some error in the indexing position of tool magazine yo, tool magazine q0 can be easily and accurately
can be positioned and fixed.

In addition, when this embodiment is applied to a chain arrangement type tool magazine as shown in Fig. 3, the locating pin is fixedly attached to the chain itself, making it possible to omit the rotating disk for arranging the locating pin. .

Although this embodiment shows an example in which the present invention is applied to a vertical machining center, it is also possible to apply the present invention to a horizontal machining center. (In the 1-shaped machining center,
Since the slide table is arranged to slide vertically along the vertical column, the tool magazine is rotated 90 degrees from the vertical machining center shown in Fig. 1, so that the rotation axis is horizontal. It is preferable to place it so that it faces the direction. By arranging locating pins at equal pitches in the horizontal direction on the rear side of the tool magazine arranged in this way (the side opposite to the workman's table side), and fixing the locator to a sliding table that moves up and down, the above-mentioned With the same function as the previous embodiment, indexing, positioning, and fixing of the tool magazine can be easily done by inserting and engaging the locator and locating pin.

It can be done easily.

Furthermore, in a machine tool in which the spindle head is mounted so as to be rotatable at a predetermined angle, it is also possible to arrange the rotating shaft of the tool magazine to be inclined at a predetermined angle with respect to the horizontal or vertical direction. Furthermore, the attachment of the locator is not limited to only the sliding body, and the locator may be attached or fixed anywhere as long as it is a spindle holder that attaches and holds the spindle to the machine body and moves together with the spindle.

For example, if the spindle is rotationally held using a ram that is slidably inserted into the spindle head, the locator may be fixed to the spindle head.

Further, the tool magazine may be disposed not only on the side of the vertical column but also on the upper side of the vertical column.

In this embodiment, an example is shown in which the locator moves toward the tool magazine, but conversely, the tool magazine may be made movable and the locating pin may be movably engaged with the stationary locator.

Further, as the locate pin, in addition to the structure in which a cylindrical bottle is fixed, for example, a rotating roller or a sphere may be used, or a structure in which radial grooves are formed at equal pitches on a circular plate may be used. .

In addition, in this example, in order to simplify the 41ζ construction,
The main shaft is moved and directly inserted into the tool holder stored and held in the tool magazine to form a flange, but the tool magazine and the main 'i'+! A tool exchange arm may be disposed between the tool exchange arm and the tool exchange arc to exchange tools. This is advantageous, for example, if the approach of the spindle to the tool magazine is structurally similar.

〔Effect of the invention〕

As explained above, according to the present invention, main! 11! I holding body and tool pine! The locator pin is restrained by the locator by the relative movement of the tool magazine, and the 4jrQ positioning and fixing of the magazine is performed, so there is no need for a special positioning and fixing mechanism like in the past, and the tool magazine can be easily allocated. Simplification of the 1f'4 construction of the positioning device, cost)
・Be able to take it down.

[Brief explanation of the drawing]

Figure 1 shows an example of the work according to the present invention. 1st view, Ω diagram 1st II
FIG. 3 is a top plan view of the tool magazine as seen from the direction of -I + approximately force, and FIG. FIG. 1 is a top view showing another embodiment of the present invention. /lI...Suri'jfI) stand, /Yu...spindle head, /6
・Active, /do t/ll... Locator, no 0. Shio...
Tool magazine 1.2/... Locate pin, H... Ding holder, T... Tool. Applicant's agent: Jo Inomata

Claims (1)

[Scope of Claims] / A machine tool comprising: a spindle having a tool flange; a spindle holder for attaching and holding the spindle to a machine tool body; and a tool magazine having a plurality of tool storage sections; A plurality of locating pins are arranged in the tool magazine at equal pitches corresponding to the arrangement position of the tool storage section, a locator is fixed to the spindle holder, and the locator is connected to the spindle holder and the tool magazine. A machine tool characterized in that the locating pin is restrained by slidingly contacting the locating pin by relative movement of the locating pin. 1. The machine tool according to claim 1, wherein the locator has a width dimension equal to the pitch interval of the locating pins and can be inserted between two locating pins. 3. The machine tool according to claim 1, wherein the locator has a wedge-shaped notch with an open tip that can be engaged with the locating pin.