JP4025116B2 - Plate material support table for plate material processing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plate material support table for a plate material processing machine. More specifically, the present invention relates to a plate material support table of a plate material processing machine that can support a plate material in a non-contact manner.
[0002]
[Prior art]
In a plate material processing machine that grips and moves and positions an end of a plate-shaped workpiece, for example, a punch press, a laser processing machine, or a plasma cutting processing machine, the plate material that is a workpiece is arranged on a plate support table. It is supported by a support such as a free bear, a roller, or a brush.
[0003]
However, when the plate material is moved, there is a problem that the back surface is scratched or lubricated due to contact with the support. Further, there is a problem that the processing start point and the processing end point are shifted due to a twist generated in the plate material due to the contact resistance between the plate material and the support.
[0004]
For example, in the laser processing machine described above, an assist gas containing metal oxide dust or the like passes downward from the cut hole or cut surface, and is scattered along the lower surface of the plate material and is deposited on the plate material support table. It is difficult to collect dust scattered along the lower surface of the plate material, and the scattered dust or accumulated dust sometimes scratches the back surface of the plate material moving on the support.
[0005]
As a plate material support table corresponding to the above-described problem, a support table 101 that supports the plate material W in a floating manner in a non-contact manner using air pressure as shown in FIG. 9 is known.
[0006]
The plate material support table 101 has an air chamber 107 provided with a large number of air jets 105 below the support table face plate 103, and supplies high-pressure (several atmospheric pressure) air to the air chamber 107. From above, air is blown upward to support the floating plate W.
[0007]
[Problems to be solved by the invention]
In the plate material support table 101 of the above-described plate material processing machine, the flying height h of the plate material W is determined by the balance between the air ejection amount (or air pressure) and the weight (F _W ) of the plate material W, and the flying height h is stabilized. Therefore, if the plate material W has the small hole 109, the force for supporting the plate material W is reduced, which causes the flying height h to fluctuate. Further, the free end 111 of the plate material W is likely to be vibrated by an upward jet.
[0008]
Since a high pressure is applied to the lower surface of the plate material support table, the plate material support table needs to be structured to withstand this pressure. However, when the supply air pressure is set to a low pressure (a little higher than 1 atm), a large number of air outlets are required.
[0009]
The present invention has been made in order to solve the above-described problems, and an object of the present invention is a non-contact method in which the change in the flying height h of the plate material W is small and vibration at the free end of the plate material is less likely to occur. It is to provide a plate material support table for a plate material processing machine capable of levitating and supporting a plate material.
[0010]
[Means for Solving the Problems]
As a means for solving the above-mentioned problems, the plate material support table of the plate material processing machine according to claim 1 is a plate material support table of the plate material processing machine, and is opposed to the plate material on a flat plate material holding surface and inside the plate material holding surface. The suction support means having a mortar-shaped recess is provided so as to be at the same level as the upper surface of the plate material support table, a swirling air chamber is provided below the mortar-shaped recess, and the air communicating with the recess is provided above the swirling air chamber The gist of the invention is to provide a jet outlet and an air inlet on the side of the swirling air chamber to impart a swirling motion to the air flowing into the swirling air chamber .
[0011]
The plate material support table of the plate material processing machine according to claim 2 is the plate material support table of the plate material processing machine according to claim 1, wherein the diameter of the air outlet is larger than the diameter of the air inlet. Is a summary .
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0017]
FIG. 1 shows a first embodiment. In the plate material support table 10 of the plate material processing machine according to the present invention, suction support means 3 are arranged in an appropriate arrangement, for example, in a lattice shape or a staggered lattice shape. It is attached to the table face plate 5 of the plate material support table 10. In FIG. 1, one of the adsorption support means 3 is shown as a representative.
[0018]
The suction support means 3 includes a nozzle body 7, an air ejection portion 9, a plate material holding surface 11, and the like. The plate material holding surface 11 is formed in an annular shape on a flat portion on the upper surface of the nozzle body 7. A mortar-shaped concave portion 13 is formed inside the annular flat plate material holding surface 11, and the air ejection portion 9 is provided at the center of the concave portion 13.
[0019]
The air ejection part 9 is provided with a nozzle 15, and the nozzle 15 has a head 17 protruding into the recess 13, and the head 17 is connected to a nozzle 19 provided in the nozzle body 7. An annular gap 21 for ejecting the high-pressure air supplied is provided.
[0020]
The suction support means 3 is attached to the table surface plate 5 so that the plate material holding surface 11 and the upper surface of the table surface plate 5 are at the same level.
[0021]
In the plate material support table 10 having the above configuration, if the plate material W is placed on the table face plate 5 of the plate material support table 10 and high-pressure air is ejected from the nozzle 15 of the suction support means 3, the air flowing out from the nozzle 15 is It flows in the radial direction from the center along the mortar-shaped curved surface of the recess 13, and then flows horizontally between the table face plate 5 and the plate material W and flows out of the plate material W.
[0022]
At this time, the force “J ↑” that causes the plate material W to float upward due to the pressure of the air that flows horizontally between the table face plate 5 and the plate material W and flows out of the plate material W acts slightly. It will be in the state.
[0023]
On the other hand, when air flows between the table face plate 5 and the plate material W, the pressure between the table face plate 5 and the plate material W decreases from the upper surface due to the difference in flow velocity between the upper surface and the lower surface of the plate material W according to Bernoulli's theorem. Thus, a force “F _B ↓” is applied to suck the plate material W in the direction of the table face plate 5.
[0024]
Further, since the air in the mortar-shaped recess 13 is entrained and discharged by the air flowing out in the radial direction (ejector effect), the force “suctions the plate member W downward due to the negative pressure above the recess 13. F _E ↓ "works.
[0025]
Furthermore, the force “F _W ↓” that pulls the plate material W downward (vertical direction) acts due to the gravity acting on the plate material W.
[0026]
As a result, the plate material W has the sum of three types of forces acting downward, “F _B ↓” + “F _E ↓” + “F _W ↓”, and the force “J ↑” that lifts the plate material W upward. At the balanced position h (plate material support height), it is held in a floating state.
[0027]
In addition, as long as air flows between the table face plate 5 and the plate material W, the force “J ↑” that lifts the plate material W upward can be obtained even if the small hole 23 is present in the plate material W. There is no contact with the face plate 5.
[0028]
The balance of the force described above is abruptly broken when the distance h (plate material support height) between the plate material W and the suction support means 3 changes. In other words, the plate material W has a large effect of staying at the stable distance h between the suction support means 3, which suppresses the vibration of the free end of the plate material W and stabilizes the floating position h (plate material support height). It works as a crystallization action, and the floating position of the plate material W is stabilized.
[0029]
FIG. 2 shows a second embodiment of a plate material support table according to the present invention. In FIG. 2, members that are the same as those in the first embodiment are given the same reference numerals, and descriptions thereof are omitted.
[0030]
The suction support means 4 (corresponding to the suction support means 3) constituting the plate material support table 20 is provided with a recess 14 (corresponding to the recess 13) similar to that of the first embodiment at the upper part of the nozzle body 7, and this A cylindrical swirling air chamber 25 is provided below the recess 14.
[0031]
An air outlet 29 that communicates with the recess 14 is provided at the upper part of the swirling air chamber 25, and an air inlet 27 is provided at the side of the swirling air chamber 25. The air inlet 27 is provided in a tangential direction in contact with the inner periphery of the swirling air chamber 25 in order to give swirling motion Vm to the air flowing into the swirling air chamber 25.
[0032]
Therefore, the air that has flowed into the swirling air chamber 25 flows along the circular inner wall of the swirling air chamber 25 and performs a swirling motion as shown in FIG. Note that the diameter of the air outlet 29 is set larger than the diameter of the air inlet 27, and by setting the air outlet 29, the air flowing out from the air outlet 29 flows upward. Instead, it flows in the radial direction from the center along the mortar-shaped curved surface of the concave portion 14.
[0033]
As a result, the same effect as that of the plate material support table 10 of the first embodiment can be obtained also in the plate material support table 20.
[0034]
FIG. 4 shows a plate material support table 30 according to the third embodiment, in which a recess 16 having the same shape as the recess 14 formed in the nozzle body 7 of the second embodiment is formed in the table face plate 5. The swirl air chamber 31 is integrally provided below the suction support means 33 corresponding to the suction support means 4 in the second embodiment.
[0035]
In addition, an air outlet 29 communicating with the recess 16 is provided substantially at the upper center of the swirling air chamber 31, and an air inlet 27 is provided in a tangential direction of the inner periphery of the swirling air chamber 31. In addition, the diameter of the air outlet 29 is set to be larger than the diameter of the air inlet 27 as in the second embodiment.
[0036]
Therefore, the same effect as that of the plate support table 20 of the second embodiment can be obtained also in the plate support table 30 of the third embodiment.
[0037]
FIG. 5 shows a plate material support table 40 according to the fourth embodiment. In the plate material support table 30 according to the third embodiment, the portion of the recess 16 provided in the table surface plate 5 is at the same level as the upper surface of the table surface plate 5. It is a flat surface. The setting of the diameters of the air inlet 27 and the air outlet 29 is the same as in the third embodiment.
[0038]
In the plate material support table 40 of the fourth embodiment having the above-described configuration, the above-described three types of forces acting on the plate material W, “F _B ↓”, “F _E ↓”, and “F _W ↓”, are described above. The position where the suction force “F _E ↓” due to the effect of the “ejector” disappears and the force “J ↑” that lifts the plate material W upward by air pressure is balanced against “F _B ↓” + “F _W ↓” Will be stable.
[0039]
FIG. 6 shows a fifth embodiment. The upper part of the swirling air chamber 31 is also integrally formed with the swirling air chamber 31, and the upper surface of the swirling air chamber 31 and the table face plate 5 are formed in the same manner as in the fourth embodiment. The upper surface is provided at the same level. The diameters of the air inlet 27 and the air outlet 29 are the same as those in the fourth embodiment. Therefore, the plate material support table 50 according to the fifth embodiment can obtain the same effects as the plate material support table 40 according to the fourth embodiment.
[0040]
7 and 8 are examples of the plate material support table showing the fourth embodiment in more detail.
[0041]
The plate material support table 60 includes a table face plate 61 for supporting the plate material W in a non-contact manner. A plurality of suction support means 63 are arranged on the table face plate 61 in an appropriate arrangement, for example, a lattice shape or a staggered lattice. It is attached to the shape. 7 and 8 show one of the plurality of suction support means 63 as a representative.
[0042]
The suction support means 63 includes an air chamber body 65, a swivel nozzle 67, a seal 69 (a, b), and the like. The air chamber body 65 is provided with a circular bottomed swivel nozzle mounting hole 68 opened upward, and the swivel nozzle 67 is mounted in the swivel nozzle mounting hole 68.
[0043]
The swivel nozzle 67 has a hollow cylindrical shape, and has an outer diameter smaller than the inner diameter of the swivel nozzle mounting hole and a flange portion 67f that fits in the swivel nozzle mounting hole.
[0044]
Further, the upper end surface of the swivel nozzle 67 is provided at the same level as the upper end surface of the air chamber main body 65, the table face plate 61 is brought into close contact with the upper end surface of the air chamber main body 65, and the air chamber main body 65 and the table 61 are fixed by fastening means such as bolts 71.
[0045]
A cylindrical annular space 73 is formed between the outer diameter of the hollow cylindrical portion of the swirl nozzle and the swivel nozzle mounting hole of the air chamber body 65. The inside of the hollow cylinder of the swirl nozzle 67 is a space that becomes a swirl air chamber 75. Four air inlets 77 (a, b, c, d) communicating between the annular space 73 and the swirling air chamber 75 are provided in the swirling nozzle.
[0046]
The four air inlets 77 (a, b, c, d) are located at the lower end of the hollow cylinder of the swirl nozzle 67 and are tangential to the center of the hollow cylinder swirl air chamber 75 with respect to the center. The azimuths are provided at intervals of 90 degrees.
[0047]
An air jet 79 is provided in the table face plate 61 above the axis of the swivel nozzle 67. The cross-sectional area of the air outlet 79 is set larger than the cross-sectional area of the air inlet 77.
[0048]
The air chamber main body 65 is provided with an air supply hole 83 that communicates with the annular space 73 from a connector 81 connected to an air pressure source (not shown).
[0049]
A seal member 69b is provided between the air chamber body 65 and the table 61 to block the air in the swirling air chamber 75 from flowing out. Further, below the flange portion 67f of the annular space 73, a seal member 69a for blocking the air in the annular space 73 from flowing out is provided.
[0050]
In the above configuration, if air from an air pressure source is supplied to the annular space 73 via the connector 81 and the air supply hole 83, the air that has entered the annular space 73 is supplied from the four air inlets 77 to the swirling air chamber. The air flows into the air 75, and the revolving motion Vm is performed in the revolving air chamber 75. And the air which flows out from the air jet outlet 79 does not go straight up, but flows out between the board | plate material W and a table upper surface in a substantially horizontal direction.
[0051]
As a result, also in the present example, as with the plate material support table 40 of the fourth embodiment, the force “J” that lifts the plate material W upward by air pressure with respect to “F _B ↓” + “F _W ↓” It will stabilize at the position where “↑” balances.
[0052]
In the first to fifth embodiments and examples described above, the table face plate (5, 61) is supported lower than the plate material support height h of the suction support means (3,4, 33). Free bears, rollers, or brushes that support the plate material W at a height are arranged at appropriate intervals, and are supported by non-contact support by the suction support means (3,4, 33) and by support members such as free bears, rollers, brushes, etc. It is also possible to select and use contact support.
[0053]
【The invention's effect】
According to the invention of claim 1, the plate material W produced by the difference between the force “J ↑” that causes the plate material W to float upward by the air pressure flowing between the table face plate and the plate material, and the flow velocity between the upper surface and the lower surface of the plate material W. Due to the balance between the force “F _B ↓” sucked in the direction of the table face plate and the suction force “F _E ↓” (ejector effect) generated by the air discharged from the recess of the suction support means, the plate material has small holes in the plate material. However, it can be stably held in a non-contact state at a constant plate material support height h.
[0054]
Moreover, the balance of the above-mentioned force collapses rapidly when the distance h between the plate material and the suction support means changes. In other words, the plate material has a large effect of staying at the stable distance h between the suction support means, and this acts as a vibration suppressing action of the free end of the plate material and a stabilizing operation of the floating position h, and the floating position is stabilized. .
[0055]
According to the invention of claim 2, since the swirling flow by the swirling air chamber and the diameter of the air outlet are set larger than the diameter of the air inlet, the air flowing out from the air outlet does not go upward. Since it flows in the radial direction from the center along the curved surface of the mortar-shaped recess, the same effect as the invention of claim 1 can be obtained.
[Brief description of the drawings]
FIG. 1 is a diagram showing a first embodiment of a plate material support table of a plate material processing machine according to the present invention.
FIG. 2 is a view showing a second embodiment of a plate material support table of the plate material processing machine according to the present invention.
FIG. 3 is a sectional view taken along line II in FIG.
FIG. 4 is a diagram showing a third embodiment of a plate material support table of a plate material processing machine according to the present invention.
FIG. 5 is a view showing a fourth embodiment of a plate material support table of a plate material processing machine according to the present invention.
FIG. 6 is a view showing a fifth embodiment of a plate material support table of the plate material processing machine according to the present invention.
FIG. 7 is an example of a plate material support table showing the fourth embodiment in more detail (plan view).
8 is a cross-sectional view taken along the line II-II in FIG.
FIG. 9 shows an example of a support table of a conventional plate material processing machine that floats and supports a plate material in a non-contact manner.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 3 Adsorption support means 5 Table face plate 7 Nozzle main body 9 Air ejection part 10, 20, 30, 40, 60 Plate material support table 11 Plate material holding surface 13, 14, 16 Recess 15 Nozzle 17 Head 19 Pipe 21 Annular gap 23 Small hole 25, 31 Swirling air chamber 27 Air inlet 29 Air outlet 33, 63 Adsorption support means 65 Air chamber body 67 Swirling nozzle 68 Swirling nozzle mounting hole 69 (a, b) Seal 71 Bolt 73 Cylindrical annular space 75 Swirling air Chamber 77 (a, b, c, d) Air inlet 79 Air outlet 81 Connector 83 Air supply hole W Plate material

Claims (2)

In a plate material support table of a plate material processing machine, an adsorption support means having a flat plate material holding surface and a mortar-shaped recess facing the plate material inside the plate material holding surface is provided at the same level as the upper surface of the plate material support table. A swirling air chamber is provided below the mortar-shaped recess, and an air jet opening communicating with the recess is provided at the top of the swirling air chamber, and an air inlet is provided on the side of the swirling air chamber, and flows into the swirling air chamber. A plate material support table for a plate material processing machine, wherein a swirling motion is imparted to the air to be performed . 2. The plate material support table for a plate material processing machine according to claim 1, wherein a diameter of the air outlet is larger than a diameter of the air inflow port .

Images