JPS63207437A - Set-up changing method for horizontal type hot forging machine - Google Patents

Abstract

PURPOSE:To shorten set-up changing time and to improve the reliability in the concentric accuracy of a die and punch by changing a set-up in the lump a die block, punch holder and transfer device in the state of setting the die and punch in the case of changing the die and transfer device in a horizontal type hot forging machine. CONSTITUTION:In the case of changing (set-up change) the die (a die block B and punch holder A) and transfer device C in a horizontal type hot forging machine the slide G to which the punch holder A is fitted is advanced and a, kickout rod 16 is retreated to release various power clamping devices. Namely an old die is removed by releasing the die block B, transfer device C and punch holder A. The, after changing the tool for cutting working stocks of a cutter, etc. a new die is fitted and the released clamping devices are fixed as well to retreat the slide G and the kickout rod 16 is advanced to adjust the cutting and feeding amt. of the stock.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for changing stages of a horizontal hot forging machine.

[Conventional technology and its problems]

As is well known, the horizontal hot forging machine (Hontoformer) is
It consists of a frame, a drive mechanism, a slide, a punch and die, a punch holder and die block, a kickout device, a transfer device, etc., and the workpieces cut as appropriate with the attached cutter are lined up in order of roughness and precision. Forging is carried out while sequentially transferring between three to five punches and dies.

By the way, conventionally, in such horizontal hot forging machines,
When producing a wide variety of forged products in small quantities, it is often necessary to change molds (die blocks and punch holders) and transfer devices (stage changes), and it takes a lot of time to change stages. , reducing productivity.

Therefore, the Gui block that holds the plurality of dies is divided into upper and lower halves along a line connecting the axes of the dies, and the upper die block holds all the dies and is taken out of the machine frame, and the dies can be replaced in an appropriately wide space. A proposal has been made to shorten the changeover time by doing so (see Utility Model Publication No. 54-40439).
.

In such a proposal, after changing the stage, the concentricity of the punch and die should be
There is still the problem that the punch is checked by inching the slide, and if the punch does not insert smoothly into the die or if the concentricity is poor, readjustment is required, and it takes time to readjust. .

[Means for solving problems]

Therefore, the present invention was created to solve the problems of the prior art, and it is possible to change the die block, punch holder, and transfer device all at once in the state where the goo and the punch are aligned (front dead center position). The changeover method of the horizontal hot forging machine reduces the time required for changeovers, and
The purpose is to improve the reliability of the concentric accuracy of the punch.

〔Example〕

The structure of the present invention, together with its operation, will be explained in detail with reference to examples attached in the appendix. FIG. 1 is a side view of an embodiment of the present invention, and FIG. 2 is a view of the main parts of FIG.
is a die block, C is a transfer device, and these members A, B, and C are essential for a horizontal hot forging machine. In this example, these members A, B, and C are Assemble it on the support and lift it all at once using crane E, as shown in Figure 2. These members A, B, and C are each clamped to the frame F or slide G by a power clamp mechanism using hydraulic pressure or air. The outline of the clamp will be explained below.

As shown in the plan view of FIG. 3(A), the die block B is pressed against the frame F by an inclined surface 1 in the example, and is fixed on the side by a wedge 2 on the other side. Further, on the lower side, screws 3, 3 . It is tightened and fixed by... In addition,
4.4 of the die block B is a die insertion opening (not shown), and 5.5 is a guide post into which a guide pin (not shown) protruding from the punch holder A can be slidably inserted.

The transfer device C is fixed to the frame F using the following various types of wedges. That is, as shown in the plan view of FIG.
It is fixed in the left and right direction with a tension of 1. For example, details of the wedge 6 are shown in FIG. 5, but the hydraulic cylinder 12
A wedge 13 is provided protrudingly on the transfer device C, and a fixing bracket (14) is slid thereon, and its tip is pressed and guided by the inclined surface of the transfer device C to be fixed.

As shown in FIG.
T-shaped pin 26 that can be tightened by
), but in any case, a mechanism that can be changed upward is used.

In this embodiment, as described above, the punch holder A, the Gui block B, and the transfer device C are automatically released only by the operation of the power clamp mechanism, and the stage is changed all at once. For this reason, we are taking the following measures in particular.

1) Conventionally, the stripper plate 15 for peeling off the product, which is provided on the frame side, is as shown in FIG.
It is attached to the Gui block B side so that it does not interfere with the punch during stage changes.

2) The guide post 5 is provided between the die block B and the punch holder A, and the following effects are expected.

In other words, positioning using only the guide post 5 and the punch insertion part cannot completely prevent mutual positional deviation during stage change, resulting in galling on the mold, but in the case of this example, the provision of the guide post 5 Its reliability has been improved. In addition, by positioning the die block B and punch holder A at all times (during stage changes, molding benefits) using the guide post 5, the reference positional relationship is always maintained, and external setup (mold outside the hot former machine frame) (replacement, adjustment) time can be shortened.

3) An automatic retraction mechanism for the kick-out rod 16 on the goer side is provided. That is, as shown in FIG. 1, the goer-side kick-out rod 16 is moved forward by a lever 17 to kick out the product of the die block B, as is well known.
Normally, it is held at the kicking position by the brake mechanism 18, and when pushing the material with a punch, it automatically moves back by the punch stroke and material thickness. According to this embodiment, since the gear is changed at the front dead center position,
In the absence of the material, the kickout rod 16 is not moved back sufficiently, and the end portion remains in the die block B, causing interference when the die block B is lifted. Therefore, the sleeve 21 is integrated with the kick-out rod 16 by a brake mechanism 18 of the kick-out rod 16 (a brake shoe 19 is pressed by a spring 20 to perform a braking action). A gear 22 is attached to the sleeve 21,
Gear 22 is driven by step motor 23 .

A screw is carved on the outer periphery of the sleeve 21 and is engaged with the frame F. Therefore, at the time of gear change, the kick-out rod 16 can be retracted integrally with the brake mechanism 18 by driving the step motor 23.

Incidentally, the crane E is a gate type crane, and as shown in FIG.
The elevating section 28 has two masts 29 protruding from each other, and is arranged vertically and horizontally on a horizontal plane between an upper frame 30 on which the masts 29 are erected and a lower frame 31 fixed to a lifting jig. Can move freely in any direction. A so-called XY floating mechanism 32 is interposed.

Since this embodiment employs the above configuration, the following operations are performed. That is, when changing the stage of the horizontal hot forging machine of this embodiment, first, the operation using the old mold is stopped → the slide G, on which the punch holder A is attached, is moved forward since it is located at the rear when the operation is stopped. The sleeve 21 is rotated by the step motor 23, and the kick-out rod 16 is moved back → various power clamp mechanisms are released. That is, in Gui Block B, wedge 2 and screw 3 are released, in transfer device C, wedge 6.7.8 and rod 11 are released, and punch holder A is released.
, release the rod 24 and T-shaped pin 26 →
Remove the old mold and hang it on one of the lifting parts 28. Q. Replace the cutter and other tools for cutting the processed material. 9. Attach the cutting die hanging on the other lifting part 28 → Various of the above. Fix the power clamp mechanism → Reverse the slide G → Advance the kickout rod 16 → Cut the material and adjust the feed amount.

Note that the crane E travels outside the machine frame with the old mold suspended.

Table 1 shows the results of measuring the time taken for the above operations.

Table 1. Step Change Time Schedule In short, the present invention employs the structure described in the claims, and therefore has the following effects.

〔Effect of the invention〕

By performing a batch changeover at the front dead center position of the Gui block, punch holder, and transfer device, it is possible to shorten the changeover time, and in turn, it is possible to fit the guide pin and guide post to the Gui block and punch holder. Since the stage can be changed in this state, the reliability of the mold concentricity accuracy at the time of stage change can be improved. For example, in the past, it took 20 minutes to change over, but as shown in Table 1, it took 10 minutes to change over.
It can be reduced to less than a minute.

[Brief explanation of the drawing]

Fig. 1 is a side view of an embodiment of the present invention, Fig. 2 is a view of the main part of Fig. 1, Fig. 3 (a) is a schematic plan view of the Gui block,
Figure (b) is a side sectional view of (a), Figure 4 is a schematic plan view of the transfer device, and Figure 5 is a sectional view of the wedge used in Figure 4. A... Punch holder, B... Gui block, C...
- Transfer device, 5... guide post. 3rd Z 4th 2'4Q- Figure 5

Claims (1)

[Claims] A method for changing a horizontal hot forging machine in which guide pins and guide posts provided on a die block and a punch holder are fitted together, and the die block, punch holder, and transfer device at a front dead center position are changed all at once.