JPH0741349B2 - Multi-stage homer and its setup change method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-step homer for forming various parts such as bolts and nuts with a punch and a die, and a method for exchanging them.

[0002]

2. Description of the Related Art Such a multistage homer is usually 4-6.
Since the punch case and the die are installed in a horizontal row in a punch case and a die block so as to face each other, and tens of thousands of tapping operations are repeatedly performed per day as the ram moves forward and backward. Damage and wear are so severe that these dies and punches also need to be replaced on a regular basis or after every damage and wear. Further, with the labor saving of the forging, it has been raised as a technical subject to enable the forging of a wide variety of products and a small amount of parts, and the die and the punch have to be frequently replaced. .

By the way, in order to forge different parts, a plurality of dies and punches of a multi-stage homer are collectively replaced, that is, at the time of so-called setup change, after temporarily stopping the multi-stage homer,
The die block and punch case were removed, and the die block and punch case in which new dies and punches were set were carefully aligned and fixed to the frame and ram of the multistage homer, respectively. However, when a single die or punch is damaged, only that die or punch is removed from the die block or punch case and replaced.

[0004]

By mounting the plurality of dies and punches in the fitting holes formed in the die block and the punch case, respectively, the die block and the punch case are positioned with high precision with respect to the die block and the punch case. Therefore, when changing the setup, the die block and the punch are aligned by adjusting the attachment position of the die block to the frame and the attachment position of the punch case to the ram, but this work is very complicated. However, there is a problem that it depends largely on the intuition and experience of the operator, and that only an expert can perform the setup change. Moreover, it is necessary to stop the multi-stage homer during the setup change, which causes a large time loss.
There is also the problem that productivity will drop significantly. In addition, since the punch case is cantilevered to the ram, a large moment acts between the frame and the ram due to the eccentric load in the vertical and horizontal directions that acts on the punch during forging, which causes the multi-stage homer There is a problem that the durability is lowered and the molding accuracy is lowered due to the play between the frame and the ram and the elastic deformation of the punch case and the ram due to an unbalanced load.

It is an object of the present invention to provide a multi-stage homer which can be easily set up and can improve the durability of the multi-stage homer and the molding accuracy, and a setup changing method thereof.

[0006]

A multistage homer according to a first aspect of the present invention comprises a pair of left and right side frames arranged in parallel, and a front frame connecting front end portions of the left and right side frames. A multi-stage homer comprising a character-shaped base frame, a ram provided between the left and right side frames to be movable back and forth, and a forging unit detachably mounted between the front frame and the ram. In the forging unit, a plurality of punches are positioned and mounted so as to be replaceable in a horizontal row, and a punch case detachably fixed to the front side of the ram and a plurality of dies facing the plurality of punches are replaced in a horizontal row. A die block that is positioned and mounted as much as possible, is arranged on the rear side of the front frame, and is detachably fixed to the base frame. Irregularities fitted to the side, in which a die block having a guide guiding portion and a pair of only movably guided punch case the front-rear direction.

Here, as in claim 2, the fitting convex portions are formed on the inner side surfaces of the left and right guide guide portions, and the fitting concave portions are formed on the side surfaces of the punch case so as to be fitted into the fitting convex portions. It is a preferred embodiment that a hanging hook that can be hooked on a crane or the like is provided on the outer surfaces of the punch case and the die block.

According to a fourth aspect of the present invention, there is provided a multistage homer set-up replacement method, wherein a plurality of multistage homer forging units are used and one preform unit is set in the multistage homer during preforming. While mounting multiple dies on the die block of another forging unit, mounting multiple punches on the punch case and fitting the punch cases into the guide guides on the left and right of the die block in a concavo-convex shape The set-up is changed by exchanging a plurality of dies and punches together with the assembling and forging unit.

[0009]

In the multistage homer according to claims 1 to 3,
Attach the forging unit between the front frame and ram of the multi-stage homer, and fix the punch case of the forging unit to the ram, and also fix the die block to the base frame at the rear side of the front frame to attach the punch case together with the ram. By moving back and forth, the material is sequentially pressed between the plurality of dies mounted on the die block and the plurality of punches mounted on the punch case.

At the time of setup change, the setup unit is replaced by exchanging the forging unit. In the forging unit to be replaced, a plurality of punches and dies are preliminarily positioned and fitted in the punch case and the die block, and the left and right sides are replaced. Guide The punch case is positioned and fitted to the die block through the guide part and assembled, and at this point, the plurality of punches mounted on the punch case and the plurality of dies mounted on the die block are aligned. , When changing the setup,
By exchanging the forging unit without fixing the die and the punch to each other, fixing the punch case of the exchanged forging unit to the ram, and fixing the die block to the base frame, the setup can be changed.

Further, the forging load is basically received by the ram and the front frame, but the up-down and left-right eccentric loads acting on the punch case during forging are caused by the ram and the guide guide portion. Will be taken effectively. Here, if hooks for hanging that can be hooked on a crane or the like are provided on the outer surfaces of the punch case and the die block, it is possible to easily perform a setup change even with a relatively heavy forging unit.

In the method for changing over a multi-stage homer according to a fourth aspect of the present invention, a plurality of dies are fitted in a horizontal row in a die block to be positioned and fixed, and a plurality of punches are fitted in a horizontal row in a punch case. Then, the punch case is positioned and fixed, and the punch case is fitted in the guide guide portion formed on the die block in a concavo-convex manner to assemble a forging unit including the die block and the punch case. The steps up to this point were performed by the external setup of the multi-stage homer, and the forging unit was fitted and mounted from above between the front frame and the ram of the multi-stage homer to fix the die block to the base frame and the punch case to the ram. Completed the setup change and started the multi-stage homer. Further, the punch and die to be used next time during this operation were assembled to the punch case and die block in the same manner as described above, the forging unit was assembled, the multi-stage homer was temporarily stopped, and then attached to the multi-stage homer in the reverse order of the above. By removing the forging unit and attaching a new preset forging unit to the multi-stage homer as described above, the setup change is completed and the multi-stage homer is restarted.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 5, the multi-stage homer 18
Is a substantially U-shaped base frame 19 including a pair of left and right side frames 19a and a front frame 19b connecting front ends of the left and right side frames 19a, and rear ends of the left and right side frames 19a. A crank shaft 22 rotatably installed between the parts, a ram 21 supported between the left and right side frames 19a so as to be movable back and forth, a crank shaft 22 and the ram 21.
And a connecting member 23 for connecting the rotational movement of the crankshaft 22 to the back-and-forth movement of the ram 21, and the front frame 19b.
Forging unit 17 detachably mounted between the ram and the ram 21
It has and.

Next, the forging unit 17 will be described with reference to FIGS. Reference numeral 1 in the drawing denotes a die block that accommodates a plurality of dies 2 in a row so as to be replaceable in a row, and guide guide portions 4 extending rearward are provided at both ends of the die block 1.

Explaining the guide guide portion 4, guide frame members 6 extending rearward from both ends of the die block 1 are formed integrally with the die block 1, and the left and right guide frame members 6 are formed.
Grooves 5 extending in the front-rear direction are respectively formed in the middle portions of the surfaces of the rail members 7 which are mounted on the rail members 7 via bolts 8.
Are fitted and fixed, and the groove 5 is formed on the inner side of the left and right rail members 7.
The fitting protrusion 3 is formed so as to project inward from the. still,
The guide frame member 6 and the rail member 7 may be integrally formed, but if they are formed separately, they may be formed in the case where the bolt 8 is screwed above and below the rail member 7, for example. By adjusting the degree of tightening of the bolt 8, the angle of the rail member 7 can be delicately changed.

Denoted by 10 in the drawing is a punch case in which the punches 11 are replaceably housed in positions corresponding to the plurality of dies 2 housed in the die block 1, respectively. The fitting concave portion 12 that fits into the fitting convex portion 3 of the guide guiding portion 4 is formed in the front-rear direction. However, a fitting concave portion may be formed in the guide guide portion 4 and a fitting convex portion may be formed in the punch case 10.

The punch case 1 is shown as 15 in the drawing.
0 is a material supplied to a material supply space 24 formed by cutting out a part thereof, and this material 15 is cut into a certain length by a known cutting means, and the cut material 15 is cut into each of the punches 11. As shown in FIG. 3, fingers 16 for disposing are provided near the joint between the punch 11 and the die 2. However, the finger 16 has various conventional methods and is not particularly limited to this method.

Next, a method for changing over the multi-step homer 18 will be described. First, a plurality of dies 2 are fitted in a horizontal row in the die block 1 for positioning and fixing, and a plurality of punches 11 are fitted in the punch case 10 for positioning and fixing, and then the left and right guide guide portions 4 are fitted. The press-fitting unit 17 is assembled by fitting the fitting concave portions 12 of the punch case 10 into the convex portions 3, respectively. Then, the punch case 10 is manually or electrically driven to the die block 1 side to bring the punch 11 and the die 2 into substantially contact with each other to check the respective alignment states. However, this centering work is carried out just in case, and is necessarily required if the processing accuracy of the fitting convex portion 3 and the fitting concave portion 12 and the fitting state of the die 2 and the punch 11 are reliable. It's not normal work.

Next, the assembled forging unit 17
Is mounted between the front frame 19b of the multi-stage homer 18 and the ram 21, as shown in FIG. At the time of this mounting, for example, if a hanging hook 20 that can be hooked on a crane or the like is formed on the upper surface of the forging unit 17, even if it is heavy, it can be installed inside the crane or the like. It will be possible.

Next, after mounting the forging unit 17, the die block 1 is first fixed to the base frame 19 of the multistage homer 18. Well-known techniques can be adopted as this fixing means, for example, the die block. 1. A screw hole is formed on the outer surface of 1, and a bolt or the like is fitted into the screw hole from the outer surface side of the base frame 19 via the base frame 19 to tighten the screw, or a pin that can be retracted and retracted is provided on the base frame 19. It is conceivable to fix the die block 1 on the base frame 19 by forming a hole to be fitted into the outer surface of the die block 1.

After fixing the die block 1 to the base frame 19 in this manner, the punch case 10 is retracted manually or the like, and the punch case 10 is fixed to the ram 21 located at the rear by a known means. When fixing the punch case 10 to the ram 21, the ram 21 is manually moved back and forth,
When installing the forging unit 17 described above, this ram 21
So that it does not get in the way, the fitting relationship between the fitting concave portion 12 and the fitting convex portion 3 is disengaged after the forging unit 17 is mounted and the ram 21 is positioned at the most front. It is preferable to set the ram 21 position so that there is no The die block 1 is fixed on the base frame 19 as described above, and the punch case 10
Is fixed to the ram 21 and the multistage homer 18 is operated.

Next, during this operation, the punch 11 and the die 2 to be used next time are fitted and fixed to the die block 1 and the punch case 10 of the other forging unit 17, respectively, as described above, and preferably centered. Also confirm. After that, when it is time to replace the die 2 and the punch 11 that are in operation, the multi-stage homer 18 is temporarily stopped, and the forging unit 17 that has been internally installed is taken out of the multi-stage homer 18 in the reverse order of the above, and waits. Other forging unit 1
7 is newly installed in the multi-stage homer 18 and is operated again, and the setup change is completed.

[0023]

In the multi-stage homer and the method for changing the setup thereof according to the present invention configured as described above, after the plurality of dies and punches are positioned and fitted in the die block and the punch case, respectively, left and right guide guides are provided. By fitting the part to the side of the punch case in a concavo-convex manner, the punch case can be accurately positioned with respect to the die block, and the die and the punch can be accurately centered. It is possible to easily align the die and the punch. Further, in this way, by sequentially exchanging using a plurality of forging units composed of the assembled die block and punch case, when the setup is changed, alignment work between the die and the punch at the time of setup change becomes unnecessary,
The work time for setup change can be shortened and productivity can be greatly improved.

Further, since the vertical load and the horizontal load acting on the punch at the time of press working are effectively received by the ram and the left and right guide guide portions via the punch case,
It is possible to prevent a large moment from acting between the ram and the base frame, prevent play between the ram and the base frame, and improve the durability of the multi-stage homer. Moreover, since the unbalanced load is effectively received by the guide guide portion in the vicinity of the forging position, the precision of the molded product can be greatly improved.

If a hook for hanging that can be hooked on a crane or the like is provided on the outer surface of the punch case and the die block, it is possible to easily change the setup even with a relatively heavy forging unit.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a forging unit.

FIG. 2 is a vertical sectional front view of a forging unit.

FIG. 3 is a transverse sectional view of a forging unit.

FIG. 4 is a vertical side view of the forging unit.

FIG. 5 is a cutaway plan view of a main part of a multi-stage homer.

[Explanation of symbols]

 1 Die Block 2 Die 3 Fitting Convex 4 Guide Guide 5 Concave Groove 6 Guide Frame Material 7 Rail Material 8 Bolt 10 Punch Case 11 Punch 12 Fitting Recess 15 Material 16 Finger 17 Pressing Unit 18 Multistage Homer 19 Base Frame 19a Side Part frame 19b Front frame 20 Hanging hook 21 Ram 22 Crankshaft 23 Connecting member 24 Material supply space

Claims (4)

[Claims] 1. A pair of left and right side frames arranged in parallel.
And the front frame that connects the front ends of the left and right side frames.
U-shaped base frame consisting of
A ram which is provided movably back and forth between the side frames, front
A forging unit that is detachably mounted between the front frame and ram.
A multi-stage homer including a knit , comprising:
The knit is positioned so that multiple punches can be replaced in a row.
A pan that is fixedly installed and detachably fixed to the front side of the ram
Chip case and multiple dies facing the multiple punches.
Positionable and replaceable in a horizontal row, front frame
Is located on the rear side of the frame and is detachably fixed to the base frame
Die block to be punched on both ends
Extends laterally and fits unevenly on the side of the punch case,
A pair of guys that guide the case movably only in the front-back direction
A multi-stage homer including a die block having a guide portion
-. 2. The multi-step homer according to claim 1, wherein the left and right guide guide portions are formed with fitting protrusions on inner side surfaces thereof, and the side surfaces of the punch case are formed with fitting recesses for fitting with the fitting protrusions . 3. An outer surface of a punch case and a die block.
The multi-stage homer according to claim 1 or 2, wherein a hook for hanging that can be hooked on a crane or the like is provided in the. 4. A forging unit for a multi-stage homer according to claim 1.
Multi-stage homer using one knitting unit using multiple knits
While it is being set and forged, the other forging unit is
Attach multiple dies to the die block of the
Attach multiple punches to the punch case to the left of the die block.
Next time, let's fit the punch case into the guide section on the right side.
Assemble the forging unit to be used, and
Changeover by exchanging multiple dies and punches
Multi-stage homer setup change method .