JPH08174294A - Slide guide device of press and its production - Google Patents

Abstract

PURPOSE: To provide a slide guide device of a press with the high dynamic precision and unbalanced load resistance. CONSTITUTION: The up and down movement is guided by abutting with sliding a slide-give 15 installed on an uprights 4 side of a press body 1 and a liner 18 installed on a slide 13 side being movable up and down with a slide driving mechanism. The slide-give 15 is composed by dividing a long size material having a circular-cylinder-like central hole into plural numbers from the center to the direction of axis line and making the face of internal circumference as a sliding face 15a, and the linear 18 is composed by dividing a circular column into plural numbers from the center to the direction of axis line and making the face of external circumference as a sliding face 18a, and they are attached respectively to the uprights 4 and the slide 13. Then, because the slide 13 is moved up and down by being guided with the circular-cylinder-like sliding faces 15a, 18a, the gap of center is made to the minimum and the dynamic precision is improved. Further, even if the slide 13 is applied with the unbalanced load, but an automatic centering mechanism is acted, so the unbalanced load resistance is also improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide guide device of a press machine for guiding vertical movement of a slide and a method of manufacturing the slide guide device.

[0002]

2. Description of the Related Art In a conventional press machine for press forming, a slide driving mechanism is provided in a crown provided on the upper part of a press body, and the slide driving mechanism moves the slide up and down to move the slide. It is configured to press-form a work between an upper mold attached to a lower surface and a lower mold fixed on a bed or a bolster. The slide is guided by a slide guide laid on the upright and slides up and down. A slide guide device for guiding the slide is, for example, as shown in (a) to (c) of FIG. Things have been adopted.

The slide guide device shown in FIG. 1 (a) has a structure in which a slide guide c having eight sliding surfaces b is provided at a corner portion of the slide a, and the sliding guide b is vertically moved by each sliding surface b. It is designed to guide movement in a sliding manner. See also FIG.
The slide guide device shown in (b) has a structure in which the slide surfaces d formed by cutting off the corners of the slide a are brought into sliding contact with the slide surfaces b of the four slide guides c. There is. Further, in the slide guide device shown in FIG. 1C, guide posts e made of four round bars are provided near the corners of the slide a, and the guide posts e are provided on the outer peripheral surfaces of the guide posts e at the corners of the slide a. The guide portion f is slidably guided.

[0004]

However, in the slide guide device shown in FIGS. 1A and 1B, the dynamic accuracy due to the misalignment of the slide a is low, and the parallelism of the slide is impaired due to the eccentric load. Since it is liable to be crushed, it is difficult to perform molding with high accuracy, and it takes time to adjust the sliding surfaces b so as to make uniform sliding contact with the slide a. Further, in the slide guide device shown in FIG. 1C, although the dynamic accuracy and the parallelism are high, the smooth vertical movement of the slide against the eccentric load is hindered, and the plurality of guide posts e and the slide a are slid. There is a problem that it is very difficult to adjust the guide portion f so that it slides evenly. The present invention has been made to improve such conventional problems, and provides a slide guide device of a press machine having high dynamic accuracy, high eccentric load resistance, etc., and easy to adjust, and a manufacturing method thereof. It is intended.

In order to achieve the above object, the present invention comprises a slide gib provided on the upright side of the press body,
In a slide guide device of a press machine in which a slide drive mechanism slides a liner provided on the slide side, which is vertically movable, to guide the slide vertical movement, the slide gib is provided with a cylindrical central hole. The long material having is divided into a plurality of axially from the center, and the inner peripheral surface of the central hole is used as a sliding surface, and the liner is divided into a plurality of axially from the center of the cylinder, and the outer peripheral surface of the cylinder is The sliding surfaces are attached to an upright and a slide, respectively.

[0006] Further, in the slide gib and the liner, a plurality of long members are combined in a prismatic shape and the outer peripheral surface is constrained by a constraining means, and the slide gib has a cylindrical central hole formed in the center thereof.
The liner is manufactured by cutting the outer peripheral surface into a cylindrical shape and then separating the long materials.

[0007]

[Operation] With the above configuration, since the slide moves up and down while being guided by the cylindrical sliding surfaces that slide with each other, the misalignment of the slide is minimized and the dynamic accuracy is improved. Also, even if an eccentric load is applied to the slide, it always faces the center of the slide, so the self-centering function works, and it is only necessary to make adjustments so that the centers of curvature of the cylindrical sliding surfaces match. It's easy. Furthermore, by combining multiple long materials into a slide guide and liner, and then separating each long member, it becomes easier to manufacture the slide guide and liner, and at the same time, there are variations among the slide give and liner. It becomes possible to perform highly accurate processing.

[0008]

Embodiment An embodiment of the present invention will be described in detail with reference to the drawings shown in FIG. Fig. 2 is a vertical sectional view of the press machine,
3 is a side view of the same, FIG. 4 is a cross-sectional view of the same, and FIG. 5 is an enlarged view of a slide guide. In these drawings, reference numeral 1 denotes a press body, which is composed of an upper frame (crown) 2, a lower frame (bed) 3, and an upright 4 interposed between the upper and lower frames 2 and 3. As shown in FIG. 4, four tie rod insertion holes 4a are provided in the upright direction in the upright 4, and the upright insertion holes 4a are provided.
The four tie rods 5 inserted into the upper frame 2
The lower frame 3 and the lower frame 3 are firmly connected.

A slide drive mechanism 6 is housed in the upper frame 2. The slide drive mechanism 6
Has a crankshaft 8 rotatably driven by a main motor (not shown) via a Whitworth link mechanism 7. The upper end side of the connecting rod 9 is supported by eccentric portions 8a provided at both ends of the crankshaft 8. Has been done. The lower end side of the connecting rod 9 is pivotally attached to the upper end of a plunger 10 which is slidably supported on the lower portion of the upper frame 2 through a pin 11, and the lower end of each plunger 10 is through a die height adjusting mechanism 12. Connected to the upper part of the slide 13. The slide 13 is provided below the upper frame 2, and four corners are supported by a slide guide device 14 laid on the upright 4 so as to be vertically slidable as shown in FIG.

As shown in FIG. 5, the slide guide device 14 has a slide gib 15 attached to the upright 4 side through an adjusting mechanism 16 and a liner attached to a corner of the slide 13 via an adjusting mechanism 17. It is composed of 18. The sliding surface 15a of the slide gib 15 is formed in the inner peripheral surface of a cylinder, and the sliding surface 18a of the liner 18 slidingly contacting the sliding surface 15a is formed in the outer peripheral surface of the cylinder. Is manufactured by various methods. As shown in FIG. 6A, the slide gib 15 has a cylindrical central hole 15 having a circumferential surface having the same curvature as the sliding surface 15a at the center.
After the rectangular column-shaped long member 15c having b is divided into four equal parts along the axis, the attachment surface 15d of the upright 4 is finished, and a plurality of attachment holes 15e for attaching to the upright 4 are formed. The eccentric pin 16a and the mounting bolt 16b of the adjusting mechanism 16 can be inserted into these mounting holes 15e.

As another manufacturing method, when four rectangular column-shaped elongated members 15c are machined so that two adjacent sides are at a right angle, a mounting hole 15e is formed as shown in FIG. The two long members 15e are connected by the bolts 19 using the two long members 15e, and the two long members 15e are machined two by two so as to be parallel to each other. Then, these long members 15c are overlapped as shown in FIG. 6C to form a prism having four elongated members 15c. Then, the outer peripheral surface of the prism is flat plate-shaped jig 20a and bolt 2.
It is fixed by the restraint means 20 composed of 0b, and a cylindrical central hole 15b is bored in the central portion of the prism by using a boring machine or the like. When the drilling of the central hole 15b is completed, the restraining means 2
By removing 0 and the bolt 19 and separating each long member 15, the slide gib 15 with high dimensional accuracy can be obtained. The method of manufacturing the slide gib 15 is not limited to the above method.

On the other hand, the liner 1 provided on the slide 13 side
Reference numeral 8 denotes a cylindrical long member 18b which has been preliminarily processed with high precision and is divided into four equal parts in the axial direction as shown in FIG. 7A, and the flat surface 18c forming a right angle is accurately finished. The flat surface 18c is provided with an adjusting bolt 17a of the adjusting mechanism 17 and a mounting hole 18d into which the fixing bolt 17b is screwed, as shown in FIG.

As another manufacturing method, four long members 18b are machined so that two adjacent sides of the four long members 18b are at a right angle, and the four long members 18b are closely contacted with each other. 7B, the end plates 18f having the center holes 8e are attached to both end faces of each long member 18b to fix the respective long members 18b, and The outer peripheral surface is constrained by a plurality of constraining means 21. The restraint means 21 is composed of a pair of jigs 21a having an arc-shaped intermediate portion and bolts 21b connecting both ends of these jigs 21a, and restrains the outer peripheral surface of each long member 18b. The outer peripheral surface of the long material 18b is turned by a lathe or the like into a cylinder. Then, as the machining progresses, a part of the restraint means 21 is removed, and as shown by the phantom line in FIG. 7C, the restraint means 21 is moved to the cylindrical portion side where the machining is completed, and the arc-shaped portion of the jig 21a is moved. The outer peripheral surface of the long material 18b is constrained and the remaining outer peripheral portion is processed. At this time, the processing accuracy is further improved by spotting 18 g of each long material 18b by welding as shown in FIG. 7B. After the long material 18b is finished into a cylinder as described above, the long material 18b is separated and the flat surface 18c is provided with the mounting hole 18d so that the liner 18 with high dimensional accuracy can be obtained. become. The method of manufacturing the liner 18 is not limited to the above method.

The operation will now be described with reference to FIGS. 2 and 5. The slide 13 driven up and down by the slide drive mechanism 6 has a slide gib 1 attached to the upright 4 side.
5 and the cylindrical sliding surfaces 15a, 18a of the liner 18 mounted on the slide 13 side are brought into sliding contact with each other to guide the vertical movement, so that the misalignment of the slide 13 becomes small and the dynamic accuracy is improved. improves. For example, compared with a conventional slide guide that guides a slide with eight sliding surfaces shown in (a) of FIG. 1, sliding surfaces 15a and 18a of a give 15 and a liner 18 are provided.
Since the clearance is reduced by about 20%, the same effect as the dynamic accuracy improved by 20% can be obtained. Further, the slide give 15 and the liner 18 are cylindrical sliding contact surfaces 15a, 18
Since the surface contact occurs at a, the offset of the slide 13 due to the misalignment is unlikely to occur, which makes it possible to eliminate the uneven contact, and the reaction force generated between the slide give 15 and the liner 18 is always the center of the slide 13. Since it acts on the side, even if an eccentric load acts on the slide 13, it is possible to prevent an unreasonable force from being generated in the mold due to the self-aligning action.

On the other hand, the clearance between the slide gib 15 and the liner 18 is adjusted by the adjusting mechanisms 16 and 17, but in the conventional slide guide device for guiding the slide 13 on a flat surface, the slide gib 15 and the liner 18 have the uprights 4. On the other hand, the parallelism and the squareness must be finished with high accuracy, whereas in the case of sliding contact with the cylindrical sliding surfaces 15a and 18a as in the embodiment of the present invention, the sliding gib 15 is If the center of curvature coincides with the center of curvature of the liner 18, even if the squareness is somewhat impaired, the performance is hardly affected. Therefore, since it is sufficient to adjust the points of the centers of curvature of the slide gib 15 and the liner 18 so as to be aligned with each other, the adjustment work is significantly easier than the conventional slide guide device.

In the above embodiment, since the prism and the cylinder are divided into four equal parts, the angle between the flat surfaces adjacent to each other is 90 °, but the angle is not limited to this angle and it is 30 to 180.
Within the range of °, there is no practical problem. In addition, the sliding surface 15a of the slide gib 15 and the sliding surface 18a of the liner 18
Even if there is some error in the curvature of, there is practically no problem. For example, as shown in (a) of FIG.
5 has a large curvature on the side of the liner 18, the stronger the eccentric load, the better the surface contact as the load acts, and as shown in (b) of FIG. Faster speeds and better accuracy will give better results.

[0017]

As described in detail above, according to the present invention, since the slide gib provided on the upright side and the liner provided on the slide side are slidably in contact with each other by the cylindrical sliding surface, The core misalignment can be minimized, thereby improving the dynamic accuracy, and since the excessive force does not act on the mold during molding, the mold life is also improved. In addition, since the sliding surface is less prone to uneven contact, stable accuracy can be maintained for a long period of time, and even if an eccentric load is applied to the slide, an aligning function that always aligns with the center of the slide works. Therefore, abnormal wear of the mold can be prevented. Furthermore, the mounting surface of the slide gib and the liner need only ensure the accuracy of parallelism in the slide movement direction, so compared to the conventional parallelism that requires accuracy such as squareness. The liner is easy to manufacture, and the adjustment is completed simply by adjusting the curved surfaces of the slide give and the liner so that they can be adjusted in a short time. Moreover, since a plurality of slide gibs and liners are machined at the same time, they can be easily manufactured and highly precise machining can be performed without variations between the slide gibs and the liners.

[Brief description of drawings]

FIG. 1A to FIG. 1C are explanatory views showing a conventional slide guide device.

FIG. 2 is a vertical sectional view of a press machine according to an embodiment of the present invention.

FIG. 3 is a side view of a press machine according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view of a press machine according to an embodiment of the present invention.

FIG. 5 is an enlarged view of a slide guide device according to an embodiment of the present invention.

6A to 6C are explanatory views showing a method of manufacturing a slide guide according to an embodiment of the present invention.

7A to 7C are explanatory views showing a method of manufacturing a liner according to an embodiment of the present invention.

8 (a) and 8 (b) are explanatory views of the operation of the slide guide device according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Press main body 4 ... Upright 6 ... Slide drive mechanism 13 ... Slide 15 ... Slide gib 15a ... Sliding surface 15b ... Center hole 15c ... Long material 18 ... Liner 18a ... Sliding surface 18b ... Long material 20, 21 ... Restraint.

Claims (3)

[Claims] 1. A slide gib 15 provided on the upright 4 side of a press main body 1 and a liner 18 provided on a slide 13 side which is vertically movable by a slide drive mechanism 6 are brought into sliding contact with each other, thereby vertically moving the slide 13. In the slide guide device of the press machine that guides the movement,
The slide gib 15 is divided into a plurality of elongated members 15c having a cylindrical center hole 15b in the axial direction from the center, and the inner peripheral surface of the center hole 15b is used as a sliding surface 15a.
A slide guide device for a press machine, characterized in that the liner 18 is divided into a plurality of columns in the axial direction from the center, and the outer peripheral surface of the column is attached to the upright 4 and the slide 13 as a sliding surface 18a. 2. A slide guide device for a press machine according to claim 1, wherein a plurality of elongated members 15c are combined into a prismatic shape to restrict the outer peripheral surface by a restriction means 20, and a central hole 15b is formed at the center of the prismatic shape. A method of manufacturing a slide gib, characterized in that the long members 15c are separated after being drilled. 3. A slide guide device for a press machine according to claim 1, wherein a plurality of long members 18b are combined in a prismatic shape to constrain an outer peripheral surface by a restricting means 21, and the outer peripheral surface of the prismatic pillar is formed into a cylindrical shape. After the cutting, each long material 18b is separated, a method for manufacturing a liner.