JP6868244B2 - Sliding member and cam device equipped with it - Google Patents

Description

The present invention relates to a sliding member capable of facilitating the rubbing work of heavy objects.

Large metal plates such as automobile bodies are press-molded by a lower fixed die and an upper moving die. At the same time as this press molding, a cam device that can be installed in the mold is used in order to make a hole in the side surface of the press molded product or to bend the edge portion.

As the cam device, for example, a cam base attached to the lower mold and a machining tool for machining the work can be installed, and a cam slider mounted slidably in the machining direction on the cam base and a cam slider attached to the upper mold to machine the cam slider. It has a cam driver that drives in the direction.

When attaching the cam device to the mold, it is necessary to rub the cam slider. However, since this cam slider is a considerably heavy object exceeding 500 kg, for example, and needs to be moved many times using a crowbar, it is a heavy burden on the operator to move it manually.

Patent Document 1 discloses a technique for improving workability by levitating a cam slider by a sliding member provided with a compressed air supply mechanism.

Japanese Patent Application Laid-Open No. 6-134529

However, in the sliding member of Patent Document 1, since the ejection hole of the compressed air is circular, when the cam slider is a heavy object, it cannot be sufficiently levitated.

The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a sliding member capable of facilitating a rubbing operation of a heavy object.

The sliding member of the present invention has a rectangular sliding surface, an air ejection hole provided on the sliding surface, and a groove portion provided on the sliding surface and communicating with the air ejection hole at a predetermined depth.

The sliding member of the present invention is a sliding member that slides in a predetermined direction and has a solid lubricant embedded in a metal base material, or a member obtained by sintering copper-based powder in a steel material, and is substantially rectangular. It has a sliding surface, an air ejection hole provided on the sliding surface, and a groove portion provided on the sliding surface and connected to the air ejection hole, and compressed air is supplied to the groove portion at the time of adjustment. During normal operation, the groove becomes an oil groove .

It is a figure which shows the sliding member of an embodiment. It is a figure which shows the AA cross section of FIG. It is a figure which shows the BB cross section of FIG. It is a figure which shows the sliding member of another embodiment. It is a figure which shows the sliding member of another embodiment. It is a figure which shows the sliding member of another embodiment. It is a figure which shows the sliding member of another embodiment. It is a figure which shows the sliding member of another embodiment. It is a schematic diagram of the cam device which attached the sliding member of embodiment.

Hereinafter, the sliding member according to the embodiment will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing a sliding member 100 of the embodiment.

As shown in FIG. 1, the sliding member 100 of the embodiment is provided in a rectangular sliding surface 101, an air ejection hole 103 provided at a substantially central portion of the sliding surface, and a sliding surface 101, and has two linear shapes. Has a groove of a predetermined depth with an X-shaped groove 104 intersecting at the position of the air ejection hole 103.

The sliding member 100 is a type member in which a solid lubricant is embedded in a metal base material in an appropriate arrangement, or a type member in which a copper-based powder is sintered on a steel material. In the embodiment, the outer shape of the sliding member 100 is plate-shaped, and the shape of the sliding surface 101 is rectangular.

FIG. 2 is a cross-sectional view taken along the line AA of FIG. FIG. 2 shows the cross-sectional shapes of the air supply hole and the air ejection hole. An air supply hole 102 is opened from one end surface of the sliding member 100 to the central portion of the sliding member 100. The air ejection hole 103 is opened from the central portion of the sliding surface 101 in the plate thickness direction of the sliding member 100, and is connected to the air supply hole 102 at the central portion of the sliding member 100.

The groove portion 104 is a groove formed on the sliding surface 101 at a predetermined depth d by intersecting the linear first groove 104a and the second groove 104b in an X shape. The air ejection hole 103 is located at the intersection of the first groove 104a and the second groove 104b.

When attached to the cam slider 12, the sliding member 100 slides in the C direction in FIG. 1 and in the opposite direction. The first groove 104a is arranged at an angle of θa with respect to the sliding direction C. The second groove 104b is arranged at an angle of θb with respect to the sliding direction C. θa and θb may be different. When considering the supply of compressed air to the sliding surface 101, it is more preferable that the angle is diagonal to the rectangular sliding surfaces 101 of θa and θb.

In this way, the first groove 104a is arranged with an angle of θa with respect to the sliding direction C, and the second groove 104b is arranged with an angle of θb with respect to the sliding direction C. Compressed air is evenly supplied to the moving surface 101, and the length in the sliding direction in which the sliding surface 100 does not contact during non-floating in normal operation can be reduced.

FIG. 3 is a cross-sectional view taken along the line BB of FIG. FIG. 3 shows the cross-sectional shape of the first groove. In the embodiment, the first groove 104a and the second groove 104b have the same cross-sectional shape. The first groove is a groove dug from the sliding surface 101 with a predetermined width and a predetermined depth d. The depth d of the groove may be constant, may be deepened toward the outer edge of the sliding member, or conversely may be shallow.

Making the groove 104 X-shaped means that the number of air ejection holes is the minimum one, and since the first groove 104a and the second groove 104b are linear, the sliding required for air floating is required. The area on the surface can be minimized. The air ejection hole 103 is not limited to the central portion of the sliding surface 101, and may be at an arbitrary position connected to the groove portion 104, but is preferably the central portion of the sliding surface 101.

However, since the sliding surface 100 may be provided with a solid lubricant, in order to avoid this, the first groove 104a and the second groove 104b are not limited to a straight line, but a curved line or a combination of a straight line and a curved line. The shape may be different, or the first groove 104a and the second groove 104b may be different shapes.

During normal operation of the cam device, compressed air is not sent from the air supply hole 102, and the sliding surface 100 directly contacts the sliding surface and slides. Further, in this case, the first groove 104a and the second groove 104b function as oil grooves. When considering the function as an oil groove, it is efficient to make the groove 104 X-shaped.

When adjusting the cam device, compressed air is sent from the air supply hole 102, and compressed air is ejected from the air ejection hole 103. At this time, air is accumulated in the groove 104 connected to the air ejection hole 103, and the compressed air is supplied not only to the central portion of the sliding surface 101 but also to both ends of the first groove 104a and the second groove 104b.

Since the compressed air is also supplied to the region away from the central portion of the sliding surface 101, the levitation force due to the compressed air is generated substantially evenly on the entire sliding surface 101. As a result, even a heavy object such as a cam slider can be stably levitated, and the cam device can be easily adjusted.

In the sliding member 100, the groove 104 is X-shaped, but other groove shapes capable of supplying air to almost the entire sliding surface can also be taken. Other embodiments will be described below.

FIG. 4 is a diagram showing a sliding member of another embodiment. As shown in FIG. 4, in addition to the X-shaped grooves 104a and 104b of the sliding member 100, a groove 104c in the lateral direction of the sliding member 100 may be further added.

Further, non-through holes 105a to 105d having a diameter of about 10 mm may be provided at both ends of the first groove 104a and the second groove 104b. By providing the non-through holes 105a to 105d, the levitation efficiency is improved.

FIG. 5 is a diagram showing a sliding member of another embodiment. As shown in FIG. 5, the sliding member 200 has a groove 204c extending in the lateral direction from an air ejection hole 203 arranged near the center of the sliding surface, and a groove 204c connected to one end of the groove 204c and extending in the longitudinal direction. The groove 204b, the groove 204d connected to the other end of the groove 204c and extended in the longitudinal direction, the groove 204a connected to one end of the groove 204b and extended in the lateral direction, and the groove 204a connected to one end of the groove 204d and extended in the lateral direction. It has a groove 204e to be formed.

The grooves 204a to 204e form an S-shaped groove portion 204 as a whole. The air ejection hole 203 is not limited to the central portion of the sliding surface, and may be any position connected to the groove portion 204, but is preferably the central portion of the sliding surface.

6 and 7 are views showing sliding members of other embodiments. As shown in FIGS. 6 and 7, the sliding member 300 has a groove portion 304 having a substantially rectangular shape as a whole, in which the grooves 304a to 304d are connected to each other on four sides. As shown in FIG. 6, the air ejection hole 303a is arranged so as to be connected to the intermediate portion of the groove 304b.

FIG. 7 shows an example in which the air ejection hole 303b is arranged at a position where the groove 304b and the groove 304c intersect. As described above, the air ejection hole 303 is not limited to the central portion of the sliding surface, and may be any position connected to the groove portion.

FIG. 8 is a diagram showing a sliding member of another embodiment. As shown in FIG. 8, the sliding member 400 has a substantially diamond-shaped groove portion 404 as a whole, in which the grooves 404a to 404d are connected to each other on four sides. As shown in FIG. 8, the air ejection hole 403 is arranged at a position where the groove 404a and the groove 404b intersect. The air ejection hole 403 is not limited to the central portion of the sliding surface, and may be any position connected to the groove portion.

(Cam device)
FIG. 9 is a view in which the sliding member of the embodiment is attached to the cam slider of the cam device. As shown in FIG. 9A, the cam device 1 includes a cam driver 11, a cam slider 12, and a cam base 13. The sliding member 100 of the embodiment is attached to the sliding surface of the cam slider 12 with the cam base 13.

In the embodiment, the case where the sliding member 100 is attached to the cam slider 12 will be described as an example, but the sliding members 200 to 400 may be attached to the cam slider 12. As shown in FIG. 9B, in order to balance the levitation force of the cam slider 12, the sliding member 100 of the embodiment is located near the center and both ends of the bottom surface of the cam slider 12 at symmetrical positions from the center. Can be attached.

When the sliding member is attached to the cam base 13 side, the degree of freedom in the position where the compressed air is ejected is reduced. For example, in Patent Document 1, it is said that the position and shape of the air ejection hole and the like are also limited. ..

On the other hand, in the embodiment, since the sliding member 100 is attached to the cam slider 12, the entire sliding surface 101 always comes into contact with the cam base 13. As a result, stable levitation force can be obtained even if the cam slider 12 moves without causing compressed air leakage.

100: Sliding member 101: Sliding surface 102: Air supply hole 103: Air ejection hole 104: Groove

Claims (7)

A sliding member that slides in a predetermined direction and has a solid lubricant embedded in a metal base material, or a member obtained by sintering copper-based powder in a steel material.
Approximately rectangular sliding surface and
An air ejection hole provided on the sliding surface,
A groove having a predetermined depth provided on the sliding surface and connected to the air ejection hole,
Have a,
At the time of adjustment, compressed air is supplied to the groove to provide
A sliding member in which the groove becomes an oil groove during normal operation. The groove portion is a groove in which two linear grooves are arranged so as to intersect with each other at a predetermined angle (excluding 0 ° and 90 °) with the sliding direction of the sliding member. The sliding member according to claim 1. The sliding member according to claim 1, wherein the groove portion is a groove arranged in an S shape. The sliding member according to claim 1 or 2, wherein the air ejection portion is provided at a central portion of the sliding surface. The sliding member according to claim 1, wherein the groove portion is a groove arranged in a rectangular shape. The sliding member according to claim 1, wherein the groove portion is a groove arranged in a rhombus shape. A cam base attached to the first mold and a machining tool for machining the workpiece can be installed. A cam slider attached to the cam base so as to be slidable in the machining direction, and a cam slider attached to the second mold in the machining direction. A cam device having a driving cam driver.
The cam device is characterized in that the cam slider is provided with the sliding member according to any one of claims 1 to 6 on a sliding surface with the cam base.

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