JPH02207999A - Press machine - Google Patents

Abstract

PURPOSE:To eliminate a work for drawing out a tie rod to the upper part of a press machine and to facilitate and reduce a maintenance work by dividing the tie rod into three and constituting it so that an intermediate part can be detached from both the upper and the lower end parts which are engaged to a head and a crown. CONSTITUTION:Plural tie rods 4 are constituted by screw coupling of the lower part tie rod 11 divided into three, an intermediate part tie rod 12 and the upper part tie rod 13. Accordingly, by detaching the each tie rod 11, 12 and 13, the tie rod 12 can be moved to the side of a head 1. As a result, a work for drawing out a long-sized tie rod 4 to the upper part becomes unnecessary. Also, a first and a second bushes 25, 26 provided adjacently on both the upper and the lower ends of the tie rods 12 (23) are tightened by the tie rods 13 (24) and the tie rods 11 (22), and also, fitted into a crown 3 and the head 1. As a result, fitting of the tie rods 4 (21) and the crown 3 and the head 1 is secured with high accuracy, and it can be prevented that the crown 3 and a column 2 are brought to lateral shift on the head 1.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a press machine, and more particularly to a press machine in which a long tie rod is separable to facilitate maintenance work to prevent wear around the slide.

(Prior Art) In general, press machines, particularly press machines that manufacture press parts used in electronic parts such as switches, are required to press a large number of parts at high speed and with high dimensional accuracy. Therefore, maintenance work is performed to prevent wear of the slide and its guide portion and deterioration of various bearing performances.

As a conventional press machine of this type, for example,
There is one described in Japanese Patent No.-49498. This device consists of a bed installed horizontally, four hollow columns placed on the bed with the longitudinal direction facing up and down, and a crown placed on the columns. They are tightened together by four tie rods that pass through and engage the bed and crown. This tie rod has a cylindrical shape with nuts screwed into both the upper and lower ends, and when the nuts are tightened, a tightening force of about 1.5 times the press capacity is applied. A slide is slidably guided in the column in the vertical direction.

Additionally, Figures 2 and 3 of the publication show a conventional example in which a column with a square cross section is provided and the slide is guided inside this column, and a column with a bent cross section excluding the inner wall. In this case, the slide is guided by a tie rod, and the tie rod having the above structure is also used in these cases.

In the case of the various conventional press machines mentioned above, for example, those with a press capacity of 40 tons to 50 tons have a tie rod length of about 1.5 m to 1.7 m, and a weight of about 45 kg.
g ~ 55 kg, and during maintenance to prevent various bearing abnormalities, wear of the slide and its guide, etc., the nut is untightened and the tie rod is pulled upward.

(Problems to be Solved by the Invention) However, in such conventional press machines, the long tie rod is pulled upward when performing maintenance for wear around the slide, etc.
Normally, major construction work would be required to transport the press machine outside and pull out the tie rods. In other words, in factories where press machines are generally installed, the ceiling is as low as about 4 m, and for example, the press capacity is 40 tons to 50 m.
The clearance from the press machine to the ceiling is 1.6m to 1.9m.
In many cases, it was impossible to pull out the tie rod indoors. Further, even when the ceiling of a factory is high, it is a large-scale work to pull out a long and heavy tie rod of 1.5 m or more upward. Furthermore, in press machines where the slide is guided by a tie rod, it is necessary to harden the surface of the tie rod, on which the bearing balls roll, by surface treatment such as quenching. Processing such as polishing after processing and its equipment have become expensive, and maintenance costs for processing equipment have also increased.

(Purpose of the Invention) Therefore, the present invention divides the tie rod into three parts, thereby making it possible to separate the middle part from the upper and lower ends that engage with the bed and crown, thereby making it possible to pull out the tie rod above the press machine. The aim is to facilitate maintenance work and reduce maintenance costs.

(Means for Solving the Problems) In order to achieve the above objects, the present invention provides (1) a bed, a column placed on the bed, a crown placed on the column, and both upper and lower ends. a plurality of tie rods that engage the bed and the crown at the ends and fasten the column and the crown to the bed, and a slide that is slidably guided vertically on the bed by the column, the ram or the tie rods;
In the press machine equipped with (2) The tie rod has a first bushing adjacent to the upper end of the intermediate tie rod and sucked between the upper tie rod and the crown, and a lower end of the intermediate tie rod. a second bushing fitted between the lower tie rod and the bed adjacent to the bed, (3) the slide is slidably guided in the vertical direction by the intermediate tie rod (4) The slide is slidably guided in the vertical direction by the column, and (5) The column includes a plurality of hollows surrounding the intermediate tie rod. The slide is slidably guided in the vertical direction by the plurality of hollow members.

(Function) In the present invention, each of the plurality of tie rods is constituted by a threaded connection of a lower tie rod, an intermediate portion, and an upper tie rod divided into three parts. Therefore, the intermediate tie rod, lower tie rod, and upper tie rod are separated,
The intermediate tie rod can be moved to the side of the bed, making it unnecessary to pull out the long tie rod upward.

Further, a first tie rod adjacent to both upper and lower ends of the intermediate tie rod
If a bushing and a second bushing are provided and these bushings are fitted into the upper tie rod and the lower tie rod as well as into the crown and bed, the strength of the fit between the tie rod and the crown and bed (fitting strength) can be improved. dimensions) are ensured with high precision, preventing the crown and column from shifting laterally on the bed and the tie rod from being eccentric, and furthermore, maintenance work and tie rod insertion work during assembly are much easier.

(Example) Hereinafter, the present invention will be explained based on the drawings.

FIG. 1.2 is a diagram showing a first embodiment of a press machine according to the present invention.

First, the configuration will be explained. In FIG. 1.2, 1 is a bed having a substantially rectangular upper flat plate 1a, and the bed 1 is installed horizontally on a predetermined installation surface F. A plurality of columns 2, for example, a pair, are placed on the upper flat plate la of the bed 1, with the longitudinal direction facing up and down so as to touch the corners or peripheral parts of the upper flat plate 1a. A crown 3 is placed parallel to the crown 1. In addition, vertical fitting holes lb are formed in the corners of the upper flat plate 1a of the bed 1, and fitting holes 2a of the same axis and the same diameter as the respective fitting holes 1b are also formed in the column 2 and the crown 3. 3a and a coaxial, small-diameter insertion hole 3b are formed. A plurality of tie rods 4, for example, four, are provided so as to pass through these insertion holes 2a, 3a and insertion holes ib, and the tie rods 4 have nuts 5U, 5L and washers 6U screwed together at both upper and lower ends. , 6L. The nuts 5U and 5L are tightened to allow the tie rod 4 to tighten the column 2 and crown 3 to the bed 1. By tightening the nuts 5U and 5L to a predetermined torque, the tightening force of the plurality of tie rods 4 is approximately 1.5 times the press capacity. It becomes. The tie rod 4 has a length of about 1.5 m to 1.6 m when the press capacity is 40 tons, and in this case, the height from the installation surface F to the upper end of the tie rod 4 is about 2.4 m.

Reference numeral 7 denotes a slide, and the slide 7 is guided by tie rods 4 through a plurality of bearings 8 so as to be slidable up and down on the bed 1, that is, to be able to move up and down. The bearing 8 holds a plurality of bearing balls 8a by a retainer (not shown), and the bearing balls 8a roll on the surface of the tie rod 4 as the slide 7 moves up and down. Also, slide 7 is 2
It is connected to a crankshaft (not shown) built into the crown 3 via plungers 9A and 9B, and when this crankshaft is driven by a drive motor (not shown), the slide 7 moves up and down. .

On the other hand, the plurality of tie rods 4 each include a lower tie rod 11 inserted into the insertion hole 1b of the bed 1, an intermediate tie rod 12 inserted into the insertion hole 2a of the column 2, and an insertion hole 3b of the crown 3. The upper tie rod 13 is inserted into the upper tie rod 13. The lower tie rod 11 has a threaded portion 11a connected to the nut 5L, a small diameter portion 11b on the intermediate tie rod 12 side, and a male threaded portion 11c.
It is coaxially fitted to the intermediate tie rod 12, and is threadedly connected to the lower end of the intermediate tie rod 12 by the male threaded portion 11c. Intermediate tie rod 12 is connected to column 2
The surface portion 12a of the bearing 8, on which the bearing balls 8a of the bearing 8 are transferred, is surface-treated, hardened, and polished to have a shorter length. 3a with a depth gap g. The upper tie rod 13 has a threaded part 13a to which the nut 5U is screwed, a fitting part 13b on the side of the intermediate tie rod 12, and a male thread part 13c. It is threadedly coupled to the upper end of the intermediate tie rod 12. That is, the lower tie rod 11, the intermediate tie rod 12, and the upper tie rod 13 constitute each tie rod 4 by spring coupling.

In FIG. 1, 14 is the lower mold installed on the bed 1 via the bolster 15, and 16 is the lower mold 14.
The lower mold 14 and the upper mold 16 move toward and away from each other at high speed as the slide 7 moves up and down. Then, a hoop material (not shown), which is a sheet metal material, is supplied between the two molds 14 and 16 by a supply means (not shown) in synchronization with the raising and lowering of the slide 7, and a predetermined press working is performed. Further, the lower tie rod 11 and the upper tie rod 13 are formed with square projections lid and 13d for tightening, and the intermediate tie rod 12 is formed with a recess (not shown) for locking.

Next, the effect will be explained.

When the slide 7 is driven up and down via the plungers 9A and 9B, and the sheet metal material is supplied between the lower mold 14 and the upper mold 16 by the supply means, a predetermined pressing process is promoted as described above. . At this time, as the slide 7 moves up and down, the bearing ball 8a of the bearing 8 moves onto the intermediate tie rod 1.
As a result, wear of the bearing balls 8a of the bearing 8, the retainer, etc., and the surface portion 12a of the intermediate tie rod 12 gradually progresses.

When the bearing balls 8a of the bearing 8, the retainer, etc., and the intermediate tie rod 12 wear out, and the bearing performance of the bearing 8 deteriorates, maintenance becomes necessary. During this maintenance, for example, the tie rod 4 is removed in the following manner. First, using a jig (not shown), the intermediate tie rod 12 is
The intermediate part tie rod 12 is prevented from rotating by using the locking recessed part, and the lower end surface of the intermediate part tie rod 12 is prevented from lowering from the lower surface of the column 2. Further, the slide 7 is placed on a predetermined table so as to be able to slide laterally on the bed 1, and is separated from the plungers 9A and 9B. Next, a support (not shown) having approximately the same length as the column 2 is interposed between the bed 1 and the crown 3. Then,
After slightly loosening nuts 5U and 5L, loosen the nuts 5L sufficiently, and remove the lower tie rod 11 from the intermediate tie rod 12 by loosening it using a tool (not shown) that engages the protrusion lid. Next, loosen the nut 5U and remove the upper tie rod 1.
3 is loosened using a tool engaged with the protrusion 13d and removed from the intermediate tie rod 12. At this time, as the nut 5U or the upper tie rod 13 loosens, the intermediate tie rod 12 descends by a predetermined amount, and the intermediate tie rod 12 is locked to the column 2 by the jig so that its lower end surface does not protrude below the column 2. Ru. Using the same procedure, the lower tie rod 11 and upper tie rod 13 of the other three tie rods 4 are removed with the struts interposed, and the crown 3 is supported by the struts. Then, slide 7 and column 2, which were separated from plungers 9A and 9B in advance.
and the intermediate tie rod 12 are moved laterally together,
The four tie rods 4 and their corresponding bearings 8 are taken out from the slide 7.

As described above, in this embodiment, the intermediate tie rod 12 of the tie rod 4 is separated from the lower tie rod 11 and the upper tie rod 13, and the intermediate tie rod 12 is moved laterally by moving both the intermediate tie rod 12 and the column 2. It is removed from the slide 7. therefore,
It is no longer necessary to pull out the long tie rod 4 upward, and maintenance work is facilitated.

In addition, in this embodiment, the tie rod 4 that guides the slide 7 requires surface treatment such as hardening, but since it is only necessary to surface treat the intermediate tie rod 12, the surface treatment cost is also low, and the treatment equipment is The cost is also reduced. As a result, maintenance work for the press machine is facilitated and maintenance costs are reduced.

In the first embodiment, the tie rod 4 was such that the nut 5L was threadedly connected to the lower tie rod 11, but for example, a lower tie rod 19 with a polygonal head as shown in FIG. 3 or a tool may be used. It may also have a lower tie rod or the like with a suitable recess for engagement. Furthermore, it goes without saying that the respective tie rods in the tie rod 4 may be screwed together so that one of the pair of tie rods to be connected may have a male thread.

FIG. 4 is a diagram showing a second embodiment of the present invention.

In FIG. 4, reference numeral 21 indicates four tie rods (only one is shown), and each tie rod 21 consists of a lower tie rod 22 divided into three parts, a middle part, and a lower tie rod 22, which is divided into three parts, substantially similar to the tie rod 4 of the first embodiment. Tie rod 23 and upper tie rod 2
It has 4. The tie rod 21 also has a first bushing 25 coaxially adjacent to the upper end of the intermediate tie rod 23 and a second bushing 26 coaxially adjacent to the lower end of the intermediate tie rod 23. It is fitted onto the tie rod 24 and into the fitting hole 3a of the crown 3. That is, the first bush 25
is fitted between the crown 3 and the upper tie rod 24. The second bushing 26 is fitted into the insertion hole 1b in the same manner as the first bushing 25, and is fitted between the lower tie rod 22 and the bed 1, and is screwed into the threaded portion 22a of the lower tie rod 22 (27L). is fixed to the lower end of the intermediate tie rod 23. Then, by tightening the nut 27U threaded to the threaded part 24a of the upper tie rod 24, the tie rod 21 integrally fastens the bed 1, column 2, and crown 3 via the flange part 26a of the second bushing 26. There is.

Note that the first bushing 25 and the second bushing 26 maintain a predetermined fitting margin with the fitting holes 1b12a and 3a of the same diameter, respectively, and the lower tie rod 22 and the upper tie rod 2
4 and the inner and outer diameters are machined with high precision to maintain a predetermined mating allowance.
Furthermore, relative lateral displacement between the head 1 and column 2, eccentricity of the tie rod 21, etc. are also restricted.

In this way, the tie rod 21 and the insertion holes 1b, 2a
, 3a can be strictly controlled, and there is no need to fit the intermediate tie rod 23 into the insertion holes 2a and 3a when assembling the tie rod 21, making it easier to assemble the press machine. .

Furthermore, lower tie rod 22 and upper tie rod 24
from the intermediate tie rod 23, and remove the first bushing 2 from the intermediate tie rod 23.
5 and the second bush 26, the intermediate tie rod 23 and slide 7 can be removed while the column 2 is normally positioned. It is more preferable that there is no need to intervene, which greatly facilitates maintenance work. Of course, the column 2 may be removed by laterally shifting the intermediate tie rod 23 and the slide 7 as in the first embodiment.

FIG. 5 is a diagram showing a third embodiment of the present invention.

In FIG. 5, reference numeral 31 indicates four hollow members that also serve as columns (only one is shown), and each hollow member 31 is inserted into the intermediate tie rod 12 of the tie rod 4 while maintaining a predetermined fitting distance. It is exteriorized. Further, the hollow member 31 has a surface treatment such as hardening applied to its outer circumferential portion, and a slide 33 is slidably guided in the vertical direction via a large-diameter bearing 32 that is substantially similar to the bearing 8 of the first embodiment. are doing. Even in this case, the lower tie rod 11 and the upper tie rod 1 of the tie rod 4
3 can be separated from the intermediate tie rod 12 and the intermediate tie rod 12 and the hollow member 31 can be moved laterally, so that the same effect as in the first embodiment can be obtained.

FIG. 6 is a diagram showing a fourth embodiment of the present invention.

In FIG. 6, reference numeral 41 denotes a plurality of columns, and each column 41 includes a slide guide portion 41a that supports both sides or four corners of the slide 42 so as to be slidable in the vertical direction, and a plurality of columns into which the tie rods 4 are inserted. It has a fitting hole 41b. Even if you do this, the lower tie rod 1 of the tie rod 4
Since the column 41 and the upper tie rod 13 can be separated from the intermediate tie rod 12 and the column 41 and the intermediate tie rod 12 can be moved laterally, the same effects as in the first embodiment can be obtained. As a modification of this embodiment, the column 2 in the first and second embodiments is provided with a hollow member surrounding the intermediate tie rod 12, 23, and the slide is slidably guided by the hollow member. possible, and these do not depart from the gist of the present invention.

(Effect) According to the present invention, each of the plurality of tie rods is divided into three,
Since the lower tie rod, middle tie rod, and upper tie rod, which are divided into three parts, are screwed to each other, the middle tie rod, lower tie rod, and upper tie rod can be separated and the middle tie rod can be moved to the side of the bed. It is possible to eliminate the work of pulling out a long tie rod above the press machine. As a result, maintenance work can be facilitated and maintenance costs can be reduced.

Further, a first tie rod adjacent to both upper and lower ends of the intermediate tie rod
1. By providing second bushings and fitting these bushings into the upper tie rod and the lower tie rod as well as into the crown and bed, maintenance work can be further facilitated, and at the same time,
It prevents lateral displacement of the column and crown and eccentricity of the tie rod, making assembly work easier.

[Brief explanation of the drawing]

1 to 3 are diagrams showing a first embodiment of a press machine according to the present invention, in which FIG. 1 is an overall configuration diagram thereof, FIG. 2 is a sectional view taken along the line ■-■ in FIG. The figure shows another aspect of the tie rod, and FIGS. 4 to 6 are sectional views of essential parts showing second to fourth embodiments of the press machine according to the present invention, respectively. 1...Bed, 2.41...Column, 3...Crown, 4.21...Tie rod, 7.33.42...・Slide, 11.19.2
2...Lower tie rod, 12.23...
- Middle part tie rod, 13.24... Upper tie rod, 25... First bushing, 26... Second bushing, 31... Hollow member. Figure 2 Figure 3

Claims (5)

[Claims] (1) a bed, a column placed on the bed, a crown placed on the column, and a plurality of tie rods that engage the bed and the crown at both upper and lower ends and tighten the column and the crown to the bed; In a press machine, each of the plurality of tie rods includes a lower tie rod inserted into the bed, and an intermediate slide inserted into the column. A press machine comprising a lower tie rod and an upper tie rod inserted into the crown, and the lower tie rods are screwed together. (2) The tie rod includes a first bush fitted between the upper tie rod and the crown adjacent to the upper end of the intermediate tie rod, and a first bush fitted between the lower tie rod and the bed adjacent to the lower end of the intermediate tie rod. 2. The press machine according to claim 1, further comprising a second bush. (3) The press machine according to claim 1, wherein the slide is slidably guided in the vertical direction by the intermediate tie rod. (4) The press mechanism according to claim 1, wherein the slide is slidably guided in the vertical direction by the column. (5) The press according to claim 1, wherein the column has a plurality of hollow members surrounding the plurality of tie rods, and the slide is slidably guided in the vertical direction by the plurality of hollow members. machine.