JPH0761560B2 - Press frame manufacturing method - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to the provision of an improved new manufacturing means for press frames, and in particular wire winding type press frames.

(Prior art) As a press frame, the components of the frame are divided into upper and lower yokes, left and right columns, and other pieces, which are assembled in a laminated form, and the entire circumference of the frame is obtained in order to obtain rigidity against the axial force of the press. A wire-winding type press frame in which a wire such as a piano wire is wound in a circular shape is known, and its representative example is disclosed in Japanese Utility Model Publication No. 61-16959.
Examples are disclosed. Based on what is described in the publication, the outline of the conventional manufacturing method will be explained with reference to FIGS. 5 to 9. In FIGS. 5 and 6, the place frame includes an upper yoke 1, left and right columns 2 and 2, and a lower yoke 6.
Each member of the above is integrated by winding a wire rod 3 such as a piano wire around the entire outer circumferences of the upper and lower yokes 1 and 6 and the left and right columns 2 and 2 in an integrated manner. Each yoke 1,6
As shown in FIG. 6, the columns 2 and 2 are constructed such that the divided pieces are assembled in a laminated manner in the thickness direction and are fastened and integrated by the tie rods 4 and 5. , The columns as a whole are compressed by the tension of the wound wire 3 through the yokes 1 and 6, and the wire tension and the compressive force of the columns 2 and 2 are necessary for a press frame. It retains unity and rigidity. As is known, the winding of the wire 3 is the eighth.
This is performed by the wire winding device illustrated in FIGS.
As shown in FIGS. 5 and 6, an assembly 7 in which upper and lower yokes 1 and 6 and left and right columns 2 and 2 are integrally assembled is used as a winding device 8.
The wire rod 3 operated by the wire rod feeding device 9 is moved to the sixth position while being fixedly mounted on the upper part and rotating the assembly 7 as shown in FIG.
Upper and lower yokes 1, 6 and columns 2, 2 as illustrated
The winding groove 10 recessed in a required cross-sectional shape over each outer peripheral surface of the
Inside, it is rolled up in an array. In this winding, the load / strain characteristics shown in FIG. 7 are obtained.
In the figure, δw is the wire elongation under no load, δF is the shrinkage of the frame under no load, δr is the total strain at maximum load, 1 / 2δw is the strain fluctuation with the working load, and Ps is the no load condition. The frame load, PL is the working load, and Pmax is the maximum load. In this case, the column shrinkage δ
In order to obtain F, about 100 kg of tension is generally required for winding, but this winding tension is not constant from beginning to end, the beginning of winding (inside) is strong, and the end of winding is large. (Outside)
Must be weakened and the tension must be curvilinearly reduced. Since the winding device 8 and the wire rod feeding device 9 are both known, a detailed description of their mechanisms will be omitted. However, the wire rod feeding device 9 includes a wire height adjusting mechanism and a reel feeding mechanism. 11 is a reel wound with a wire rod, 12 is a tension roll, 13 is an idler roll paired with the roll, 14 is a load cell, 15 is a tension detection roll, 16 is a guide roll, and these are part of the reel feeding mechanism. Is. In this way, as a press frame, while maintaining the integrity and rigidity, the wire winding type press frame is designed to withstand the amount of pressing force at the wire rod portion, for example, as shown in FIG. The hot isostatic pressurizing device 17 is incorporated therein, or the diamond device 18 is incorporated as illustrated in FIG. 11, and the like, which is suitably used as a frame for various presses.

(Problems to be Solved by the Invention) The above-mentioned conventional manufacturing means have the following problems. That is, since the winding tension at the time of wire winding is high, there is a disadvantage that the size of the wire winding equipment is increased.Furthermore, the wire winding tension at the time of wire winding does not always stay at a constant tension, but is lowered in a curve. It is necessary to control the tension, and this tension control becomes more difficult as the equipment becomes larger.Therefore, there is a problem that it is necessary to limit the rotation speed of the winding device. Since the wire winding is performed after the frame is assembled, if the compression amount of the column greatly deviates from the designed design value after the wire winding, it is impossible to correct it.
It has a significant disadvantage in production.

(Means for Solving the Problems) The present invention solves the above problems and eliminates the column,
By winding the wire around the assembly with the lower yoke, and after assembling the column, the column winding is carried out so that the required wire winding tension is maintained at a constant tension and a small tension. It is also possible to speed up the winding work and to correct the processing of the column after the wire winding. Specifically, the upper yoke, the jack, and the lower yoke are integrally assembled in the above-mentioned order, and In a state in which the required wire rod is wound around the lower yokes in a fitted state under a constant tension so that there is no gap between the aligned wire rods, and the wound wire rod is stretched by the jack. , The column is inserted and set between the upper and lower yokes, the winding wire rod, the upper and lower yokes and the column are integrated by removing the load on the jack, and then the jack is removed to obtain the press frame.

(Operation) According to the above technical means of the present invention, as illustrated in FIG. 1, the upper yoke 21, the jack 27 such as a hydraulic jack, and the lower yoke 28 are assembled in this order in a concentric and serial manner. In the assembly, the required wire rod 23 is wound around the outer peripheries of the upper and lower yokes 21 and 28 by a known wire winding device. The wire winding tension of this wire rod 23 is
By winding under a required tension such that no gap is generated between the wire rods 23 wound in an aligned manner, for example, a constant tension of about 5 to 10 kg, 1/100 of the conventional tension of about 100 kg is obtained. 1
It will be 0 or less. Therefore, the wire winding device requires less equipment than the conventional one, and since it has a small tension and a constant value,
The wire winding speed can be made faster than before without the need for tension control, and the time required for wire winding work can be significantly shortened. In the one in which the wire rod 23 is wound as described above,
As shown in FIG. 2, the jack 27 is loaded and stretched so that the entire wound wire 23 is stretched as indicated by the length L shown in the drawing. In this stretched state, the upper and lower yokes 21, 2 are
After inserting and setting the left and right columns 22 between 8 as shown in FIG. 3, the load of the jack 27 is removed, and the compressive force of the winding material 23 acts on both columns 22, 22. The upper and lower yokes 21 and 28, columns 22 and 22, and wound wire rod 23.
The integrated press frame structure of is easily obtained.
So also in this press frame, columns 22,22
If the compression amount and the stress value of each part are not manufactured within the accuracy of the design plan value, the load can be applied again by the jack 27 and the column 22 can be immediately removed, making it easy to correct the processing of the column. After the desired press frame is obtained in this manner, the gap l of the jack 27 is reduced as shown in FIG. 4, and the jack 27 is removed to complete the press frame manufacturing. The problem of can be solved.

(Example) An appropriate example of the present invention will be described with reference to Figs. 1 to 4. In FIG. 1, a plurality of semi-circular yoke pieces are laminated in a thickness direction as is known, and an upper yoke 21 and a lower yoke 28, which are connected by a tie rod 24 to be united, are integrally wound to wind a wire rod 23 in a circle. In the case of mounting, the cylinder main body 27a of the jack 27 by a hydraulic jack is detachably installed on the lower yoke 28 so that the jack main body 27b can be moved up and down, and the lower surface of the upper yoke 21 is detachably fixed. Tool 29,29
The pressure-resistant block 25 is attached by using the spacer block 26 according to the size of the prespray, and the upper and lower yokes 21 and 28 are integrated into an integrated assembly between the pressure-resistant block 25 and the jack main body 27b. The wire rod 23 is fixed on the winding device 8 described above with reference to FIGS. 8 and 9, and the wire rod 23 is used to feed the wire rod 23 such as a high yield strength wire to the outer circumference of the upper and lower yokes 21 and 28 as shown in FIG. It is wound in a line in an aligned manner over the space. In this wire winding, the wire is wound under a tension of about 5 to 10 kg, which does not cause a gap between the aligned wire rods 23, and under the same tension all the time. Is wound around the upper and lower yokes 21 and 28. Then, as shown in FIG. 2, by driving the jack 27 and supplying the hydraulic pressure to the cylinder body 27a of the jack main body 27b to extend the load, the entire winding wire 23 is extended as indicated by the wire extension L. In this extended state, the upper and lower yokes 2 as illustrated in FIG.
Insert the left and right columns 22, 22 between 1, 28, set so that the winding wire rods 23, 23 contact the outer circumference of each column 22, 22, and then remove the load on the jack 27. , The compressive force of the wire acts on both columns 22, 22, and the upper and lower yokes 21, 28,
The left and right columns 22, 22 and the wound wire rod 23 are integrally formed into a press frame. In the press frame thus obtained, the column compression amount, the stress of each part, etc. can be immediately measured and inspected, so the column compression amount and the stress value of each part were not manufactured to the same accuracy as the design plan value. Case, load the jack 27 and immediately
The 22,22 can be removed from the integrated frame, and by doing so, the working correction of the column 22 can be performed immediately, and the desired press frame can be obtained accurately, and the cylinder main body 27a and the jack main body 27b shown in FIG. The gap between
By removing the spacer block 26, the pressure resistant block 25, and the jack 27, a high-precision wire winding type press frame is completed.

(Effect of the invention) According to the manufacturing method of the present invention, the wire winding tension is 5 to 10 kg as compared with the conventional manufacturing, so that the tension can be as low as 1/10 or less of the conventional 100 kg. Not only is the size reduced, but the tension of 5 to 10 kg may be a constant tension from beginning to end, so there is no need to control the winding tension in a curved line as in the conventional case, and the winding speed can be increased by this. With a standard scale press frame, it took about 20 days in the past, but according to the method of the present invention, it can be produced in only about 5 days. In the case where other things greatly deviate from the design plan value, it was impossible to correct it at all, but in contrast to the fact that the column can be removed and the machining correction can be done immediately, this makes it possible to perform high precision wire winding type press frame. Low cost, high precision Than it has an advantage in that the can be provided below.

[Brief description of drawings]

FIG. 1 is a front view showing an upper and lower yoke assembly and a wire winding state according to a method embodiment of the present invention, FIG. 2 is a front view showing the same winding wire extension state, and FIG. 3 is a column loading state. Explanatory drawing, FIG. 4 is a front view of the same press frame, FIG. 5 is a front view of a press frame by a conventional method, FIG.
FIG. 8 is an explanatory view of a press frame load / strain characteristic, FIG. 8 is a schematic plan view of the wire winding device, FIG. 9 is a side view of the same, and FIGS. 21 …… upper yoke, 22 …… column, 23 …… wire rod, 24 …… tie rod, 25 …… pressure block, 26 …… spacer block, 27 …… jack (hydraulic jack), 28 …… lower yoke.

Claims (1)

[Claims] 1. An upper yoke, a jack, and a lower yoke are integrally assembled in the order described above, and no gap is formed between the wire rods for aligning required wire rods over the outer circumferences of the upper and lower yokes of the assembly. A winding wire rod is wound around the fitting wire under a constant tension, and the wound wire rod is extended by the jack, and a column is inserted and set between the upper and lower yokes. A method for manufacturing a press frame, characterized in that the upper and lower yokes and the column are integrated, and then the jack is removed to obtain a press frame.