JPH051093B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a press working apparatus, and particularly to a progressive type press working method in which a plurality of types of punching dies are arranged side by side to perform multi-step punching.

[Prior art]

The support grid that supports the fuel rods in a nuclear reactor must reliably hold the fuel rods arranged in a matrix, and is usually constructed by combining plates 1 shaped like the one shown in Figure 1 into a grid. . Such a plate material 1
Because the punched shape is complex, when pressing equipment is commonly used.

FIG. 2 shows a schematic configuration of this type of general device.

Processing material 2 is conveyed between upper mold 3 and lower mold 4 at a predetermined speed. The upper die 3 and the lower die 4 are the punching dies m ₁ , m ₁ ′, m ₂ , m ₂ ′,...
are arranged side by side in pairs, and these punching dies shear the material 2 to be processed into a shape corresponding to the dies by the periodic vertical movement of plungers P ₁ , P ₂ . . . which are appropriately provided above and below. . The processed material 2 undergoes a plurality of pressing steps using these punching dies, thereby becoming a processed product as shown in FIG. 1, for example.

In a press working apparatus having such a configuration, the plate material 1 shown in FIG. 1 has conventionally been formed through the working steps shown in FIG. 3. Hereinafter, conventional processing steps will be explained with reference to FIGS. 3 and 4. FIG. 4 shows each blank portion of the unprocessed plate material 10. As shown in FIG.

A slit 11 is formed in the unprocessed plate material 10 using the Γ first press.

Γ Hole 12 is formed with the second press.

Convex portions are formed in portions 13 and 14 of the plate 10 using a third press.

Convex portions 15 and 16 are formed by a fourth press.

A hole 17 is formed using the Γ fifth press.

A slit 18 is formed by the Γ sixth press.

A hole 19 is formed using the Γ seventh press.

The upper end 20 of the plate 10 is cut using the Γ eighth press.

The upper end portion 21 is cut using the Γ ninth press.

ΓThe left and right ends 23 and 24 of the plate 10 are pressed by the 10th press.
cut.

ΓAs a final step, the lower end portion 25 is cut off to separate the plurality of plates 10 that are sent in series into one piece at a time.

By repeating these steps a plurality of times, the product plate material 1 shown in FIG. 1 is formed.

By the way, in the conventional press processing apparatus as outlined above, when forming a product sheet material as shown in Fig. 1, a plurality of molds having the same shape are arranged in a row, and each stamping machine used in each pressing process is arranged in a row. The upper and lower molds are constructed by arranging a plurality of types of punching dies in parallel according to the shape of the product plate material.

Therefore, the width of the unprocessed plate is at least 1 plate
As the plate material 1 becomes longer, it is necessary to prepare an unprocessed plate material with a corresponding width. In addition, the punching dies used in each pressing process require multiple dies with the same shape to be installed in a row in order to correspond to the shape of the final product, which increases the size of the equipment and furthermore, Product yields were generally poor because individual molds were pressed.

[Purpose of the invention]

This invention was made in view of the above-mentioned circumstances, and aims to provide a press working method that can narrow the width of unprocessed material, is compact, can be punched at high speed, and has good product accuracy and yield. shall be.

[Structure of the invention]

In this invention, when forming a plate material as described above, a predetermined press pattern is sequentially formed by repeating it along the longitudinal direction of the plate material to be pressed.
The gist is that a plurality of pattern unit dies constituting the basic division pattern of the press pattern are provided at intervals in the threading direction of the plate to be pressed, and the pattern unit dies are used to move the plate to be pressed at a basic division movement period. The unit molds provided between the plurality of pattern unit molds are operated and molded at a cycle that is a predetermined integral multiple of the basic section movement cycle. It's in the press processing method.

〔Effect of the invention〕

Therefore, according to the present invention, (1) The plurality of pattern unit molds forming the basic division pattern are provided at intervals in the threading direction of the workpiece plate, and are integral multiples of the period of the basic division pattern. Since a unit mold for shaping at a period of 2 is provided on the installation line of the pattern unit mold, the width of the workpiece may be as narrow as required for the product.

(2) Since there is no need for shearing dies that repeat the same shear pattern, the width of the upper and lower dies can be narrowed, which allows the press equipment to be more compact, and the press process can be performed at higher speeds. It is possible to aim for

(3) Product precision and yield are improved because it is not necessary to press multiple molds in each pressing process.

It has excellent effects such as

〔Example〕

The press working method according to the present invention will be described below with reference to embodiments shown in the accompanying drawings.

In this example, a mold as shown in FIG. 5 is used to manufacture the plate material shown in FIG. 1. Note that FIG. 5 is a schematic plan view of the lower mold, and the upper mold used in this embodiment also has a structure corresponding to this, so illustration thereof is omitted.

The mold in this example will be explained with reference to FIG.

The mold K1 is a pattern unit mold for forming the hole 12, the mold K2 is a pattern unit mold for forming the convex part 15, the mold K3 is a pattern unit mold for forming the convex part 14, and the mold K4 is a pattern unit mold for forming the convex part 16. The pattern unit molds for forming, mold K5, are pattern unit molds for forming the convex portions 13, and mold K6 are pattern unit molds for forming the slits 11. It is provided.
The mold K7 is a unit mold for cutting out the left and right end portions 22 and 23 and operates at a predetermined cycle of the basic division pattern. Type K8 has slit 18 and holes 17, 19
The pattern unit mold for forming the mold K9 is the upper end part 2
This is a pattern unit mold that cuts out 0.21. The mold K10 is for cutting the end portion 25.

The mold K11 is for punching out the upper end portion 26 and is a unit mold that operates at a predetermined cycle of the basic division pattern, and the mold K12 is a unit mold for punching out the left and right end portions 27.

Next, FIG. 6 shows the overall configuration of this press working apparatus.

The upper mold 30 and the lower mold 40 are provided with a plurality of types of molds K ₁ to K ₁₂ as shown in FIG. 5, and the workpiece 2 is conveyed between these molds. These punching dies K ₁ to K ₁₂ are provided with plungers P 1 to P ₁ which are appropriately provided above and below to correspond to the shape of the product.
By the vertical movement of P ₁₂ , the raw material 2 is punched into a shape corresponding to the mold.

By the way, in this pressing process, the plunger
P ₁ to P ₆ , P ₃ and P ₉ are driven once every time the plate 2 moves in one basic section pattern (see Figure 1), but the plungers P ₇ and P ₁₂ are driven once when the plate 2 moves to the product plate 1. It is driven once at a period of movement of the total length L,
Further, the plunger _P11 is driven once every time the plate 1 moves by two basic sections 2l. Such intermittent driving of the plungers is performed by controlling intermittent drive units 50 to 52 provided in each plunger, respectively.

Each of the intermittent drive sections 50 to 52 is constituted by, for example, a counter 60 and a comparison section 70, as shown in FIG.

One pulse signal is input to the counter 60 every time the plate 1 moves by one basic section l. The counter 60 counts this pulse signal and inputs the count output to the comparator 70. Here, the comparison section 70
is the predetermined setting value C set for each comparison section.
and the above counter output, and only when they match, a signal G is generated to drive the plunger.
and outputs a reset signal RST for the counter 60.
The above setting value is "2" in the comparison section of the intermittent drive section 51.
In the comparison section of the intermittent drive sections 50 and 52, the number of repetitions of the basic section 1 is "13". The initial setting values of the counters in the intermittent drive sections 50 and 52 are different from each other, thereby correcting the time lag when the raw plate material first reaches each intermittent drive section.

Next, the specific operation of this press working will be explained according to the working steps.

Γ First, when the plate material 2 reaches the position of the mold _K1 , the plunger _P1 is driven and the hole 12 is formed. After this, the plunger _P1 has the plate material 10 in the basic section l.
The holes 12 are driven once each time the holes are conveyed, and a plurality of holes 12 are arranged in parallel in the longitudinal direction (A-A direction).
are formed continuously.

ΓNext, the plunger _P2 is driven so that the plate material 2 reaches the position of the mold _K2 , and the convex portion 15 is formed.
After this, the plunger P ₂ moves to the basic section l as described above.
The convex portions 15 are continuously driven at a period of , thereby forming a plurality of parallel convex portions 15 .

The Γ-types K ₁ , K ₄ , and K ₅ operate in the same manner, thereby continuously forming a plurality of parallel convex portions 14 , 16 , and 13 , respectively.

Γ Next, when the plate material 2 reaches the position of the mold K ₆ , the plunger P ₆ is driven and the slit 11 is formed. After this, the plunger P ₆ is in the basic section l
The slits 11 are continuously driven at a period of , thereby forming a plurality of slits 11.

Γ Next, when the plate 2 reaches the position of the mold K ₇ , a signal is output from the intermittent drive unit 50 , which drives the plunger P ₇ to cut off the left and right ends 23 of the plate 10 . After this, plunger
P ₇ is controlled by the intermittent drive unit 50 to move the plate material 10
is driven at a cycle of the total length L, and the plate material 1 is driven at this cycle.
The left and right ends 23 of 0 are sequentially formed.

ΓNext, when the plate material 2 reaches the position of the mold _K8 , the plunger _P5 is driven to form the slit 18 and the holes 17 and 19. After this, the plunger _P8 is continuously driven at the period of the basic section l,
As a result, a plurality of parallel slits 18 and holes 17, 19 are continuously formed.

Γ Next, when the plate material 2 reaches the positions of the molds K ₉ and K ₁₀ , the plunger P ₉ is driven, thereby cutting off the upper ends 20, 21 and the lower end 25. After this, the plunger P ₉ is driven continuously with the period of the basic section l, as a result of which the upper end 20,
21 and the lower end portion 25 are successively cut off.

ΓNext, when the plate 2 reaches the position of the mold K ₁₁ , the plunger P ₁₁ is driven, which causes the upper end 2 to
6 is cut out. After this, plunger P ₉ is 2
The upper end portion 26 is sequentially cut off every other basic section 1 by driving once every basic section 2l.

Γ When the plate 2 finally reaches the position of the mold K ₁₂ , the plunger P ₁₂ is driven and the right end 27 of the plate 2 is
is cut out. After this, the plunger P ₁₂ is driven at a cycle of the total length L of the product plate 1, and as a result,
The left and right end portions 27 are cut off, and the plate materials 2 that are successively fed are divided into lengths corresponding to the total length L of the product plate material 1.

By repeating such a press working process a plurality of times, a plurality of product plate materials 1 are sequentially formed in the longitudinal direction.

In addition, when forming a plate material as shown in FIG. 1 using this press processing apparatus, the above-mentioned press process is only an outline explanation, and the original press process includes other appropriate bending processes and finishing processes. etc. will be applied.

Furthermore, the present invention is not limited to the support grid for nuclear fuel rods as shown in FIG. Of course, the present invention can be applied to any other plate material as long as it is a plate material that is repeated in a periodic manner.

[Brief explanation of the drawing]

Figure 1 is a plan view showing the plate material used for the support frame for reactor fuel, Figure 2 is a conceptual diagram of a general progressive press machine, and Figure 3 is a press of a conventional press machine. FIG. 4 is an explanatory diagram showing the process, FIG. 4 is an explanatory diagram for explaining the correspondence between the unprocessed plate material and the plank part, and FIG. 5 is an example of the mold structure used in the press processing apparatus according to the present invention. FIG. 6 is a plan view showing an example of the conceptual structure of the press working apparatus according to the present invention, and FIG. 7 is a block diagram showing an example of the internal structure of the intermittent drive section. DESCRIPTION OF SYMBOLS 1... Fuel rod support grid plate material, 2... Unprocessed plate material, 3, 30... Upper mold, 4, 40... Lower mold, 50, 51, 52... Intermittent drive section, 60...
Counter, 70...comparison section, P...plunger.

Claims (1)

[Scope of Claims] 1. A press working method in which a plurality of types of molds are provided to form a predetermined press pattern that is repeated in the longitudinal direction of a pressed plate, comprising: a plurality of types of patterns constituting basic division patterns of the press pattern. Unit molds are provided at intervals in the sheet passing direction of the plate material to be pressed, and the pattern unit molds are sequentially operated each time the plate material to be pressed moves in basic sections to form each, and the plurality of types of pattern units are formed. A press working method characterized in that unit molds provided between the molds or at the end thereof are operated at a cycle that is a predetermined integral multiple of the basic section movement cycle.