JP2538156B2 - Work pallet clamp device for machine tools - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamp device for positioning and fixing a pallet carrying a work on a table of a machine tool.

[0002]

2. Description of the Related Art Conventionally, when a work such as a die is machined, a die material may be mounted on a pallet and transferred together with the pallet onto a table of a machine tool for machining.
Then, such a pallet is configured to be transferred to a table of a machine tool by a transfer mechanism and then positioned and fixed at a predetermined position by a clamp device. As such a clamp device, for example, a positioning device such as Japanese Patent Publication No. 63-28740 can be used. Fixation devices are known. This device allows a clamp mechanism equipped with a pusher that presses and supports the side surface of the pallet to be movable.When loading the pallet on the table, the clamp mechanism is retracted to a position where it does not interfere, and when the loading is completed, the clamp mechanism is clamped. The pallet is moved to the position and the side surface of the pallet is pressed and held by the pusher.

[0003]

However, in the case of the above-mentioned device, the device becomes complicated because the clamp mechanism needs to be moved on the table. For example, an existing machine tool may be additionally machined. If so, there is a problem in that it is time-consuming, and that space is restricted.
Further, it takes time to position and fix the work pallet on the table after the work pallet is carried in, and it has been desired to improve the work efficiency.

[0004]

In order to solve such a problem, the present invention provides a plurality of units embedded on a table of a machine tool.
A row, a plurality of cylinder units with a predetermined pitch interval, and
Multiple T-type clan that can move up and down by operating the Linda unit
Equipped with a pad and the upper end of this T-shaped clamper on the table
Transfer when the T-type clamper moves upward while facing
Inserted in the T-shaped groove formed on the lower surface of the work pallet
In the pallet clamp device that can be inserted,
Embed the quenching plate in both ends of the T-shaped groove on the pallet side.
Install the hardened plate on the table top
If possible, make the upper part of the cylinder of the cylinder unit small.
Diameter so that it can be inserted between a pair of quenching plates.
The outer width of the T-type clamper is larger than the groove between the quenching plates.
It is characterized by being made large.

[0005]

The work pallet is carried in with the T-type clamper on the table moved upward, and at the same time, each T-type clamper is inserted into the T-shaped groove on the lower surface of the work pallet. When the work pallet is loaded and positioned, the cylinder unit embedded in the table is operated to move the T-type clamper downward, and the T-type clamper and the T-shaped groove are engaged to clamp the pallet. At this time, the work palette
Embed a quenching plate in both ends of the T-shaped groove on the
Make sure that the quenching plate of
As there is no need to worry that the quenching plate will wear,
There is no need to worry about the height of the pallet changing. In addition, the cylinder
The upper part of the cylinder of the unit has a small diameter,
The thickness of the quenching plate should be inserted between the plates
As I tried to earn cylinder length by the amount, the table
The length of the cylinder can be increased compared to the thickness of
Wear. Conversely, make the table thickness smaller than the cylinder length.
You can do it.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a work pallet clamp device of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a plan view showing a layout around a machine tool, FIG. 2 is a side view of the machine tool seen from the direction A in FIG. 1, and FIG. 3 is a plan view of a table of the machine tool on which a pallet is placed.

As shown in FIGS. 1 and 2, pallet stockers 2 are provided at a plurality of locations around a plurality of die machining machine tools 1, and in front of the machine tool 1, the pallet stockers 2 run left and right in the drawings. The rail 3 and the orthogonal rail 3 that runs in the vertical direction in the figure via the turntable 50 are provided. A carriage 4 is arranged on the traveling rail 3 so that the pallet stocker 2 can be reciprocated between the pallet stocker 2 and the machine tool 1 or a machine tool of another station.

At the position of the pallet stocker 2,
A die material (hereinafter, referred to as a work W) is placed and fixed on the pallet P, the pallet P is transferred onto the carrier truck 4 in front of the pallet stocker 2, and the carrier truck 4 is mounted on the machine tool 1. The pallet P is moved forward and is sent together with the work W onto the table 5 of the machine tool 1 for positioning and machining.

The work pallet clamp device of the present invention is for positioning and fixing the pallet P transferred onto the table 5, and by fixing the pallet P, the work W mounted thereon is fixed. It is for positioning and fixing in position.

Further, the table 5 is provided with a transfer mechanism 6 capable of receiving and retracting the pallet P pushed in from the trolley 4 side. As shown in FIG. 3, the transfer mechanism 6 is a table. 5 on one side.

Before describing the work pallet clamp device of the present invention, the structure of the pallet P will be described first with reference to FIG. 8 shows the pallet P,
A is a plan view of the whole and B is a partially enlarged side view.

The pallet P has a plate thickness thinner than that of a conventional mold pallet, has a substantially rectangular shape in plan view, and has four parallel sides on the back surface side along the longitudinal direction. It has a T-shaped groove t. The T-shaped groove t is designed to allow a T-shaped clamper 17 on the table 5 side, which will be described later, to enter therein, and also a guide roller 16 to guide the movement during loading and unloading. ing.

On one end of the side surface of the pallet P, a pair of front and rear side grooves s, which are engaging portions with the transfer mechanism 6, are provided along the longitudinal direction. In other words, the side surface groove s can be engaged with the roller chain 11 of the transfer mechanism 6 which will be described later, and is used for moving the pallet P into and out of the table 5 by the reciprocating circulation of the roller chain 11.

Next, the structure around the table 5 on the machine tool 1 side will be described.

As shown in FIG. 3, the table 5 of the machine tool 1 is provided with an intermediate roller 7 at the end portion (the left side in the drawing) near the side of the carriage 4 and the tip portion of the pallet P fed from the carriage 4. It is designed to receive the bottom surface.

A plurality of T-grooves 8 orthogonal to the loading / unloading direction are provided on the surface of the table 5, and an elevating / lowering support roller 9 described later is disposed in the T-grooves 8 so as to be retractable. The transfer mechanism 6 is provided at one end of the end portion on the table 5 side.

The transfer mechanism 6 is provided with a roller chain 11 which is an endless track on a horizontal plane, a pair of horizontal rotary sprockets 12 and a drive sprocket 13, and adjusts the tension of the roller chain 11. A tensioner 14 is provided. The top roller 15 of the roller chain 11 engages with the side surface groove s of the pallet P. That is, the top roller 15 is hooked in the side surface groove s to receive and send out the pallet P.

Two rows of guide rollers 16 are provided to prevent lateral shake when the pallet P is carried in and out. The guide roller 16 is a horizontal roller that rotates around a vertical axis so that, out of the four rows of T-shaped grooves t on the lower surface of the pallet P, the guide rollers 16 can be inserted into the two rows of T-shaped grooves t from the end close to the transfer mechanism 6 side. The number of guide rollers 16 is six in each row.

Further, at the time of carrying-in, a plurality of T's shown by broken lines in FIG.
The mold clampers 17 and the like will also enter, but the details will be described later.

Two side push cylinder units 18 are provided in the vicinity of the transfer mechanism 6 described above. That is, the side push cylinder unit 18 presses the side surface of the loaded pallet P and presses it toward the side stopper 19 provided at the end of the table 5 on the opposite side to position and fix the pallet P. A guide roller 1 that engages in a T-shaped groove t on the lower surface with a play gap.
6. This is for more accurate positioning in the horizontal width direction by eliminating a clearance error with the T-type clamper 17.

In addition to the shock absorber 21 and the stopper 22 which receive the tip of the pallet P to be carried in, the air supply manifold 23 for blowing air from the lower surface of the pallet P onto the surface of the table 5 is provided in the inner part of the table 5.
Is provided.

Now, the elevating support roller 9 incorporated in the T groove 8 of the table 5 will be described with reference to FIG. FIG. 7 shows a vertically movable support roller embedded in the T groove of the table. FIG. 7A is a side view showing a part along the longitudinal direction, and FIG. 7B is a sectional view taken along the line BB of FIG. is there.

The elevating and lowering support roller 9 is provided in each T groove 8 of the table 5 as described above, and has a long cylinder case 24 positioned at the bottom of the T groove, and a predetermined pitch in the cylinder case 24. A plurality of pistons 25 provided at intervals and a roller support member 26 connected to the upper end of the piston 25 are provided, and the roller support member 26 supports a plurality of rollers 27.

Then, for example, when the piston 25 moves upward by hydraulic drive, the upper end of the roller 27 jumps slightly upward from the upper surface of the table 5, and when the piston 25 lowers, the upper end of the roller 27 sinks downward from the surface of the table 5. Therefore, when receiving or sending out the pallet P, the roller 2
7 is projected upward, and when positioning the pallet P, the roller 27 is immersed.

Next, the structure of the T-type clamper 17 will be described with reference to FIGS. 4 is a partially enlarged view of FIG. 3, FIG. 5 is a sectional view taken along the line DD of FIG. 4, and FIG.
It is an E line sectional view.

As described above, when the pallet P is carried onto the table 5, the T-type clamper 17 is inserted into the T-shaped groove t on the lower surface of the pallet P. As shown in FIG. For example, three T-type clampers 1 for the T-shaped groove t of
I try to insert 7.

That is, the T-type clamper 17 includes a cylinder 29 fixed to the table 5 as shown in FIG.
Clamp piston 30 provided in this cylinder 29
And a rectangular clamp plate 31 fixed to the upper part of the clamp piston 30, and the diameter of the cylinder 29 protruding above the table 5 is smaller than the narrow groove width at the lower end of the T-shaped groove t of the pallet P. The clamp plate 31 has a small diameter so that it can be inserted into the groove, and the width of the clamp plate 31 is wider than the narrow groove width at the lower end of the T-shaped groove t.
It is designed so that it can enter the wide groove at the top.

An unclamping spring 32 is provided below the clamp piston 30 to constantly urge the spring upward, and when the clamp piston 30 is in the upper position, the clamp plate 31 is located above the T-shaped groove t. The upper and lower surfaces can be inserted with a clearance in the wide groove, and when the clamp piston 30 is lowered, the clamp plate 31 presses the stepped portion of the T-shaped groove t, and the pallet P is placed on the table 5 surface. I'm trying to clamp between and.

At both ends of the T-shaped groove t, which is pressed down by the clamp plate 31 at the time of clamping and whose lower surface is pressed against the surface of the table 5, a hardened plate h which is hardened to enhance its strength is provided. It is embedded, and the lower surface thereof is projected slightly downward from the lower surface of another pallet P. Therefore, when clamped by the T-type clamper 17, the portion of the quenching plate h is placed on the table 5
They will come into close contact with each other.

In addition to the above structure, a forward end confirmation limit switch 3 for confirming the forward position of the pallet P as shown in FIG. 3 is provided near the transfer mechanism 6 of the table 5.
3 and a pallet pull-in confirmation limit switch 34 for confirming the pull-in of the pallet P, and a data lead 35 for reading the data such as the type of the work is provided on the left side of the opposite side in the drawing. It faces the front of the attached data carrier d.

An outline of the operation of the work pallet clamp device having the above-mentioned structure will be described.

The work pallet P sent from the trolley 4 side is received by the transfer mechanism 6 on the table 5 and drawn onto the table 5. At this time, the lifting support roller 9 provided on the table 5 rises to support the lower surface of the pallet P,
Further, the two rows of guide rollers 16 enter the T-shaped grooves t in the two rows on the lower surface of the pallet P to prevent the lateral deflection of the pallet P. Also, a plurality of T-type clampers 1 that are simultaneously in the upward movement position
7 also enters the T-shaped groove t without contact.

Next, when the tip of the pallet P comes into contact with the stopper 22, air is sent from the air supply manifold 23 to the air passage in the pallet P, is blown out through a plurality of air blow holes on the lower surface of the pallet P, and the upper surface of the table 5 is blown. Blow away any debris, etc.

At the same time, the side push cylinder unit 18 shown in FIG. 3 operates to press and position the pallet P toward the opposite side stoppers 19. Therefore, the positioning in the horizontal width direction is surely performed.

After that, the elevating and lowering support roller 9 that has been raised up to that point gently descends, and when the lower surface of the pallet P contacts the table 5, the T-type clamper 17 is activated. That is, the clamp piston 30 descends, and the clamp plate 31 moves to the T-shaped groove t.
The pallet P is attracted and clamped toward the table 5 by engaging with the inner step portion.

Therefore, not only the pallet P can be clamped very quickly, but also the pallet P is clamped directly on the surface of the table 5 so that the pallet can be reliably clamped and the posture of the work W is lowered, so that the cutting tool is cut. The degree of freedom of can be increased.

Then, the work is carried out in such a clamped state, and when the work is finished, the work is unclamped and dispensed.

[0038]

As described above, in the work pallet clamp device of the present invention, each T-type clamper is provided on a plurality of cylinder units embedded in the table so as to face the table, and at the same time when the pallet is carried in. Since it is inserted into the T-shaped groove on the lower surface of the pallet, the clamp mechanism does not require any extra space, and the time required for clamping can be shortened. Therefore, work efficiency can be improved. Further, by clamping the pallet directly on the table, the posture of the work is lowered, and, for example, the degree of freedom of the cutting jig facing upward is increased. And work
Embedding quenching plates at both ends of the T-shaped groove on the pallet side
Then, bring this quenched plate into close contact with the upper surface of the table.
As a result, there is no need to worry about the quenching plate becoming worn.
In addition, there is no concern about the height of the work pallet changing. Change
Then, make the upper part of the cylinder of the cylinder unit a small diameter,
Insert it between a pair of quenching plates and
I tried to earn the cylinder length by the thickness of the rate
Therefore, increase the length of the cylinder compared to the thickness of the table.
can do. Conversely, rather than the length of the cylinder
The thickness of the package can be reduced.

[Brief description of drawings]

FIG. 1 is a plan view showing a layout around a machine tool.

FIG. 2 is a side view of the machine tool as viewed from A in FIG.

FIG. 3 is a plan view of a table of a machine tool on which a pallet is placed.

FIG. 4 is a plan view of a T-type clamper, which is a partially enlarged view of FIG.

5 is a cross-sectional view taken along the line DD of FIG.

6 is a sectional view taken along line EE of FIG.

FIG. 7 is a side view showing a part of a lifting support roller along the longitudinal direction, and B is a sectional view taken along line BB of A.

FIG. 8 shows a pallet, where A is an overall plan view and B is a partially enlarged side view.

[Explanation of symbols]

 1 Machine tool 5 Table 17 T-type clamper 29 Cylinder 31 Clamp plate P Pallet t T-shaped groove

Claims (1)

(57) [Claims] 1. A plurality of cylinder units embedded in the table for positioning and fixing a work pallet to be transferred onto a table of a machine tool, and a plurality of cylinder units having a predetermined pitch interval, and vertically movable by the operation of the cylinder units. A plurality of T-type clampers are provided, and the upper end of the T-type clamper faces the table, and when the T-type clamper moves upward, the T formed on the lower surface of the work pallet to be transferred.
In a pallet clamp device that can be inserted into a groove, a quenching pre-press is provided at both ends of the T groove on the work pallet side.
The hardened plate on the table.
It can be closely attached to the surface, and the upper part of the cylinder of the cylinder unit has a small diameter,
It can be inserted between a pair of quenching plates, and the outer width of the T-type clamper is
A work pallet clamp device for machine tools, which is also characterized by a large size .