JP2006297454A - Press frame - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a press frame which can be easily transported, is free from production of casting defects, and has resistance to a press load, and with which press height can be reduced. <P>SOLUTION: The press frame is constituted of: a bed 3; a pair of right and left side frames 2, 2 erected at the upper face of the bed 3; a forward connection member 1A of connecting forward connection parts 23, 23 projecting forward at the upper end part of the right and left side frames 2, 2; and a backward connection member 1B of connecting backward connection parts 24, 24 projecting backward. The forward connection member 1A and the backward connection member 1B are columnar members with rectangular cross sections in which the vertical dimensions are longer than the longitudinal width, and form two insertion holes of tie rods 13, 14 for connecting the right and left side frames 2, 2 at an upper part and a lower part. The respective tie rods 13, 14 are fastened with nuts 15, 16. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a press frame. The structure of the press includes a frame that receives pressure and supports the whole, a slide that reciprocates with an upper die, and a drive unit that reciprocates the slide. In addition, there are C-shaped frames used for small and medium-sized machines and straight-side structures used for medium-sized machines and higher. The present invention relates to a press frame having a straight side structure.

5 to 7 show a press frame having a straight side structure conventionally employed. This press frame is composed of three members, a crown 101, an upright 102, and a bed 103, and has a structure in which these divided three members are tightened by a tie rod 104 (Non-patent Document 1). The split surfaces of the crown 101 and the upper surface of the upright 102 and the bed 103 and the lower surface of the upright 102 are firmly integrated by the tie rod 104 after being positioned by interposing a positioning member such as a key.
The crown 101 is a portion corresponding to the head of the press, and is a member that houses a crankshaft and gears. Usually, the left and right side members 120, 120 and one central member 110 for connecting these side members are formed into a three-dimensional shape that is substantially inverted U-shaped when viewed from the front.
The upright 102 is a columnar member between the crown 101 and the bed 103.
The bed 103 is a member for fixing the bolster to which the lower mold is attached, and stably supports the entire press on the foundation.

  Each of the side members 120 and 120 of the crown 101 is formed with circular holes 105 and 105 to support journal portions at both ends of the eccentric shaft (crankshaft) and transmit a load to the crown 1. ing. 106 is a ring-shaped sleeve. Since these two holes 105 and 105 need to be precisely machined to horizontally support the eccentric shaft, the right and left crown side members 120 and 120 can be machined into one part (crown 101). The crown central member 110 is cast as a single piece.

Since the diameter of the hole 105 in the crown 101 is large and the crown 101 is also a substantially inverted U-shaped three-dimensional object, its size is large, so that it is generally difficult to transport.
Further, in order to smoothly transmit the load during operation to the tie rod 104, the crown side members 120 and 120 need to have a complicated shape, and therefore are manufactured by casting, but the side members 120 and 120 and the central member 110 are still manufactured. In the meantime, since the meat flow changes rapidly, casting defects are likely to occur, and when an eccentric load is applied, there is a problem that stress tends to concentrate.
Furthermore, since the upper part is blocked by the crown 101, the maintainability of the slide and connecting rod is poor. In addition, since the height of the press is high, vibration at the time of starting and stopping the slide can be reduced, the building where the press is installed becomes large, and the construction cost is high.

"Revised press machine edition", pages 56-57, published October 1, 2001 2nd edition Issued by author Ida Press Study Group Japan Machinist Co., Ltd.

  In view of the above circumstances, an object of the present invention is to provide a press frame that is easy to transport, has no casting defects, is strong against a press load, and can reduce the height of the press.

The press frame of the first invention comprises a bed, a pair of left and right side frames erected on the upper surface of the bed, and a connecting member that connects the upper ends of the pair of left and right side frames. The front connection member that connects the front portions of the upper ends of the pair of left and right side frames, and the rear connection member that connects the rear portions.
The press frame according to a second aspect is the press frame according to the first aspect, wherein the front connecting member and the rear connecting member are columnar members having a rectangular section whose vertical dimension is longer than the front-rear width, and for connecting the pair of left and right side frames. The insertion hole of this tie rod is formed in two up and down, It is characterized by the above-mentioned.
A press frame according to a third aspect of the present invention is the press frame according to the first aspect, wherein a front coupling portion for connecting the front coupling member to a front portion projecting forward at an upper end portion of the pair of left and right side frames, and a rear portion projecting rearward A rear coupling portion for coupling the rear coupling member is formed in the portion.
In the press frame according to a fourth aspect of the present invention, in the second aspect of the present invention, both the front coupling member and the front coupling portion and the rear coupling member and the rear coupling portion are positioned by positioning members. It is characterized by that.
A press frame according to a fifth aspect of the present invention is characterized in that, in the first aspect, each of the side frames is a member in which a lower upright part and an eccentric shaft support part are integrally formed.

According to the first invention, since the side frame and the connecting member can be manufactured separately, the transportation is easy, and even if the casting is performed, there is no portion where the meat flow changes suddenly, and a casting defect is hardly generated. Further, the front and rear connecting members are attached to the upper end portion of each side frame so as to be distributed forward and rearward. For this reason, since the space above the slide and connecting rod is vacant, the maintainability of the slide and connecting rod is improved. Furthermore, by placing the connecting members on the front and back surfaces without placing them on the top surface of the press frame, the height of the press frame is reduced, so vibration at the time of sliding start and stop can be reduced, and the height of the building where the press is installed is low. As a result, construction costs can be reduced.
According to the second invention, the front and rear connecting members are longer in the vertical dimension than the width, so that the vertical rigidity of each connecting member is increased and the deformation of the side frames is easily reduced.
According to the third aspect of the invention, since the connecting portion on the press frame side that is connected to the connecting member protrudes forward and rearward, the space surrounded by the front and rear connecting members is not narrower than the front and rear width of the press frame, and the slide It can be accommodated without reducing the size of the connecting rod and can exhibit great performance.
According to the fourth aspect of the present invention, the connecting position of the front / rear connecting member and the front / rear connecting portion is not displaced by the positioning member, so that the frame is prevented from being displaced even when a large load is applied, and the dimensional accuracy of the forged product is kept high. it can.
According to the fifth aspect of the invention, the side frame including the eccentric shaft support portion is a columnar member that is a separate member from the connecting member, and thus has no unevenness like a crown, and has a large hole for passing the eccentric shaft. Also, it can be transported without being bulky.

Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a longitudinal sectional view of a press frame according to an embodiment of the present invention. 2 is a view taken along the line II-II of FIG. 1 in the press frame. FIG. 3 is a plan view of the head of the press frame. FIG. 4 is a partial perspective view of the head of the press frame.

1-2, 3 is a bed. This bed 3 may be the same as a conventional bed.
A pair of left and right side frames 2, 2 are erected on the upper surface of the bed 3. Each side frame 2 is a member in which a lower upright part 21 and an upper eccentric shaft support part 22 are integrally formed, and the overall shape is columnar. The upright portion 21 is a portion corresponding to the upright 102 (see FIGS. 5 to 6) in a conventional press frame, and includes front and rear columnar portions. The eccentric shaft support portion 22 is a portion corresponding to the crown side member 120 in the conventional press frame, but is different in that it is a simple columnar shape.

  The upper ends of the left and right side frames 2 and 2 are connected by two connecting members 1A and 1B. That is, front coupling portions 23 and 23 projecting forward from the lower end portions are formed on the front surfaces of the upper end portions of the side frames 2 and 2 (that is, the upper end portions of the eccentric shaft support portions 22 and 22). Rear coupling portions 24 and 24 projecting rearward are also formed on the rear surface. Each of these connecting portions 23 and 24 has a shape whose vertical dimension is longer than the projecting width, and two rod insertion holes for passing tie rods are formed in the vertical direction.

A front connecting member 1A is inserted between the left and right front connecting portions 23, 23. The front connecting member 1A is a columnar member having a square cross section and has a vertical dimension larger than the width. And two rod insertion holes for letting a tie rod pass are formed up and down.
The rear connecting member 1B is also inserted between the left and right rear connecting portions 24, 24. The rear connecting member 1B is also a columnar member having a square cross section, and the vertical dimension is larger than the width. . And two rod insertion holes for letting a tie rod pass are formed up and down.

When assembling the press frame of the present embodiment, the front connecting member 1A is inserted between the left and right front coupling portions 23, 23, and the two front tie rods 13, 13 are inserted into each rod insertion hole, and both ends thereof are inserted. The nuts 15 and 15 are screwed into and fastened. Similarly, the rear connecting member 1B is inserted between the left and right rear coupling portions 24, 24, the two rear tie rods 14, 14 are inserted into the rod insertion holes, and the nuts 16, 16 are screwed into both ends thereof. Conclude.
If a preload is applied to each of the tie rods 13 and 14, the deformation of the frame can be suppressed.

In the present embodiment, since the front and rear connecting members 1A and 1B are longer in the vertical dimension than the width, the vertical rigidity of each connecting member 1A and 1B is increased, and the deformation of the side frames 2 and 2 is easily reduced.
Further, since the front / rear coupling portions 23 and 24 coupled to the connecting member protrude forward and rearward, the space surrounded by the front and rear connecting members is not narrower than the front / rear width of the press frame, and the slide and connecting rod are made smaller. Even if not, it can be accommodated and can exhibit great performance.

  Furthermore, the positioning at the time of fastening between the front coupling parts 23, 23 and the front coupling member 1A and between the rear coupling parts 24, 24 and the rear coupling member 1B is performed using a positioning member such as the key 7. In this case, since the positional deviation after assembly, especially when a load is applied, the positional deviation can be reliably prevented, the rigidity of the frame is increased, and the dimensional accuracy of the forged product can be increased.

  The side frame 2 and the bed 3 are joined by a tie rod 11. The tie rod 11 passes through the side frame 2 and the bed 3 and is tightened with a nut. Thus, since the number of joints in the vertical direction is reduced from two conventional locations to one, the number of assembly steps is reduced. If preloading is performed in advance, frame deformation can be suppressed.

Also in the press frame of the present embodiment, the hole 5 that passes through the eccentric shaft and supports the journal portion is formed in the eccentric shaft support portion 22 that is an upper portion of the side frame 2. Reference numeral 6 denotes a sleeve, the outer diameter of which is the same as the inner diameter of the hole 5, and the inner diameter is a diameter that supports the journal portion of the eccentric shaft.
Even in this embodiment, the center positions of the left and right holes 5 and 5 must be accurately aligned. To do so, the left and right side frames 2 and 2 are overlapped and directly positioned using the positioning key 7. What is necessary is just to fix both the side frames 2 and 2 with the tie rod for temporary fixation using the hole for positioning and fastening connection member 1A, 1B. In this case, since the distance between the two holes 5 and 5 is also shortened, the processing is facilitated.

The diameter of the hole 5 increases as the press stroke increases. However, the left and right side frames 2 are columnar members, and are not as uneven as a crown in a conventional press frame, and therefore can be transported without being bulky.
Further, since both the side frame 2 and the connecting members 1A and 1B are cube-shaped members and may be manufactured separately, there is no portion where the meat flow changes suddenly even if casting is performed, and casting defects are less likely to occur.

In the press frame of the present embodiment, the connecting members 1A and 1B of the side frames 2 and 2 are attached to the upper end portions of the side frames 2 and 2 in a distributed manner on the front and rear sides. For this reason, since the space above the slide and connecting rod is vacant, the maintainability of the slide and connecting rod is improved. In addition, since the height of the press frame is reduced, vibration at the time of starting and stopping the slide can be reduced. In addition, the height of the press frame is reduced, so the height of the building where the press is installed can be low, and if it is installed in an existing building, there is little modification of the building, and the construction cost is reduced in the case of a new building. it can.
In the press frame of the present embodiment, the side frame 2 has a columnar shape, and the press frame is connected to the tie rods 11, 13, 14 directly by connecting the tie rods 11, 13, 14 in the vertical and horizontal directions. I can escape. For this reason, stress concentration does not occur as in the case where an eccentric load is applied to the cast member, and deformation of the press frame and deterioration of the dimensional accuracy of the forged product can be prevented. Further, since the connecting positions of the connecting members 1A, 1B and the front / rear connecting portions 23, 24 are not displaced by the key 7, the frame is prevented from being displaced, and the dimensional accuracy of the forged product can be maintained high.

It is a longitudinal section of a press frame concerning one embodiment of the present invention. It is the II-II arrow directional view of FIG. 1 in the press frame. It is a top view of the head in the press frame. It is a fragmentary perspective view of the head in the press frame. It is a longitudinal cross-sectional view of the conventional press frame. It is the VI-VI arrow directional view of FIG. 5 in the conventional press frame. It is the VII-VII line arrow view of FIG. 5 in the conventional press frame.

Explanation of symbols

1A, 1B connecting member
2 Side frame
3 beds
7 Key 13 Tie rod 14 Tie rod 23 Front joint 24 Rear joint

Claims (5)

Bed and
A pair of left and right side frames erected on the upper surface of the bed;
It consists of a connecting member that connects the upper ends of the pair of left and right side frames,
The press frame according to claim 1, wherein the connecting member includes a front connecting member that connects the front portions of the upper ends of the pair of left and right side frames, and a rear connecting member that connects the rear portions. The front connecting member and the rear connecting member are columnar members having a rectangular section whose vertical dimension is longer than the front-rear width, and two tie rod insertion holes for connecting the pair of left and right side frames are formed vertically. The press frame according to claim 1, wherein: A front coupling portion for coupling the front coupling member to a front portion projecting forward at the upper end portion of the pair of left and right side frames, and a rear for coupling the rear coupling member to a rear portion projecting rearward The press frame according to claim 1, wherein a connecting portion is formed. The press frame according to claim 2, wherein both the front connecting member and the front connecting portion and the rear connecting member and the rear connecting portion are positioned by a positioning member. 2. The press frame according to claim 1, wherein each of the side frames is a member in which a lower upright portion and an upper eccentric shaft support portion are integrally formed.

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