JPS5915317B2 - Direct acting hot stamper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a direct-acting hot stamper for stamping and marking steel pieces such as billets and blooms.

During blooming rolling of steel billets such as slabs, sheet bars, plumes, billets, etc., the bloomed steel billets are sheared and weighed, and their history including material, converter, charge number, ingot number, cutting order, etc. is marked.

This is for the purpose of preventing contamination of foreign materials and for use in subsequent process control.

Therefore, markings on hot steel billets need to be clear, indelible, and error-free.

This hot marking method can be roughly divided into three methods.

One method is to spray paint onto a stencil plater piece of steel.

However, this method is difficult to use due to the lack of a suitable paint that can withstand hot steel slabs and the inefficiency of paint usage.
It is hardly used now.

The second method is to prepare serial number plates made of steel plate in advance and sequentially attach the serial number plates to the steel pieces.

In this method, the serial number plate is simply placed on the steel piece, so the serial number plate is often lost, and the serial number and the attached material specification table (material, history, etc.)
It was inconvenient to have to compare the two.

Therefore, it is not widely used at present.

The third method is an engraving method using a stamper.

Currently, there are three types of stampers: a manual type, a swing arm type, and a direct acting type.

In the manual stamping method, a marking punch is set on the marking head at the tip of the seed, and the operator holds the seed and hits the stamping punch at the tip against the steel piece to make a mark.

This involved hot manual labor, resulting in extremely poor working conditions, and the stamping punch had to be replaced every time stamping was performed, resulting in extremely poor work efficiency.

As shown in FIG. 1, in the second swing arm type stamper, for example, a nine-digit stamp wheel 1 and a stamp head 2 incorporating a character selection mechanism are suspended from a swing arm 4 that is swung up by a lifting cylinder 3. The character selection mechanism and the like are controlled by a control section 6 via an assembly wire 5.

This swing arm type stamper operates the control unit 6 to select characters around the stamping wheel using the character selection mechanism, swings up the stamping head 2 using the lifting cylinder 3, and uses its own weight to strike the stamping head 2 against the steel piece. It is used for stamping markings.

The final direct-acting stamper is constructed as shown in FIG.

That is, like a swing arm type stamper, a piston rod 13 is attached to an embossing cylinder 14, and an embossing head 12 incorporating a character selection mechanism (not shown) and an engraving wheel 11 is attached to the tip of the piston rod 13.
is pushed out, and the stamping wheel of the stamping head hits the steel piece to make a marking stamp.

The character selection mechanism of the embossing head is operated by a control unit 16 via an assembly wire 15, similar to the swing arm system.

These swing-arm type stampers and direct-acting type stampers are relatively widely used because they can more reliably apply permanent markings than other marking methods and seed-type stamping methods.

However, in these swing arm type and direct-acting type stampers, the embossing head with a built-in character selection mechanism strikes the steel piece with a relatively large stroke to make an engraving. There is a problem that the character selection mechanism may be damaged or malfunction frequently due to shock, heat, vibration, etc.

Furthermore, not only the character selection mechanism but also the marking wheel itself was often damaged due to the large impact during marking.

Further, the motion is transmitted to the character selection mechanism by an assembly wire, which causes the problem that the character selection motion is slow and the motion is not reliably transmitted to the character selection mechanism.

In addition, in a swing arm type stamper, this is not a problem because the swing arm itself bends, but in a direct drive type stamper, the stamping surface of the steel piece is not positioned parallel to the stamping wheel. In this case, clear engraving could not be made over the entire area.

Furthermore, there is no way to easily check which characters on the engraving wheel of the engraving head are exposed for engraving and set in the engraving state during the character selection operation of the engraving wheel.

In the case of a direct-acting stamper, the stamping stroke by the stamping cylinder is short, and the stamping position of the steel billet is restricted.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an automatic stamper that solves the problems of the conventional swing arm stamper and direct acting stamper as described above.

More specifically, the first object of the present invention is to separate the character selection mechanism and the embossing head so that the impact of the embossing head is not transmitted to the character selection mechanism. It is an object of the present invention to provide a direct acting stamper that is free from damage and malfunction.

A second object of the present invention is to bring the embossing head into contact with the steel piece in advance and collide the hammer with the tail of the embossing head to substantially eliminate the embossing stroke of the embossing head. To provide a direct-acting stamper which reduces damage to built-in parts of the stamping head by reducing impact on the stamping head.

A third object of the present invention is to provide a direct-acting stamper in which the stamping head is always brought into contact with the stamping surface of the material to be stamped in parallel so that clear markings can always be obtained. be.

A fourth object of the present invention is to provide a direct-acting stamper in which a character selection mechanism is provided with a marking device so that characters set during a character selection operation can be easily confirmed.

A fifth object of the present invention is to forge the stamping wheel and the feed gear into a body so as to sufficiently withstand the impact during stamping.
To provide a direct-acting stamper that reduces the occurrence of damage to a stamping wheel.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a direct acting stamper embodying the present invention will be described with reference to the accompanying drawings.

FIG. 3 and FIG. 4 are a front view and a sectional view showing a schematic configuration of an embodiment of a direct-acting stamper according to the present invention.

As shown in FIGS. 3 and 4, a guide stand 24 supported by pillars 21, 22, and 23 is provided on a support stand 25, and a guide rail (not shown) formed on the guide stand 24 A movable cart 27 on which wheels 26 are placed and guided is provided.

The tip of the piston rod 4 of a cylinder device 28 installed under the guide stand 24 is attached to the rear end of the moving cart 27, and the moving cart 27 moves left and right on the guide rail by the operation of the cylinder device 28. Move to.

On the movable cart 27, an embossing head 30 and a marking section 31 provided thereon are placed.

Furthermore, on the embossing head 30, side columns 32 and 3 are provided at the rear.
A character selection machine 35 is supported by 3 and whose front part is raised and lowered by a cylinder device 34.

The embossing head 30 and marking section 31 shown in FIGS. 3 and 4 are constructed as shown in FIGS. 5 and 6.

The embossing head 30 has side frames 41 and 42, a main frame 43 that connects the side frames, and a cylindrical body 44 that is connected to the main frame 43.
The frames 41, 42, 43 and the cylindrical body 44 are formed integrally with each other.

A shaft 45 extends between the side frames 41 and 420, and six or nine marking wheels 46, for example, are rotatably mounted on the shaft.

As shown in FIGS. 7 and 8, each marking wheel 46 has a marking wheel portion 47 and a feed gear portion 48 that are integrally forged.

In order to lock the marking wheel during stamping, a locking stop 49 is provided for each marking wheel.

This locking stopper 49 is attached to another shaft 50 attached between the side frames 41 and 42.

The hammer portion 31 includes a first cylindrical body 61 and a second cylindrical body 62 surrounding the cylindrical body 44 of the embossing head 300.

The first cylindrical body 61 has a flange portion 68 having an opening with an inner diameter slightly larger than the outer diameter of the embossing head 300 and the cylindrical body 44.
A fixed ring 65 is fixed to the cylindrical body 44 of the stamping plate with a disc spring 64 sandwiched between the flange portion B and the flange portion B.

The second cylindrical body 62 has a flange 66 extending laterally as shown in FIG.
is fixed to the first cylindrical body 61 with a screw 6T.

A bearing 68 is inserted into the second cylindrical body 62 to facilitate sliding of the cylindrical body 44 of the embossing head.

A third slender cylinder 69 is fitted into the rear of the second cylinder 62, and a nozzle 70 is placed therein.

An end plate 71 is attached to the end of the third cylindrical body 69, and is fixed to the second cylindrical body 62 with a long threaded pin 71a.

The end plate 71 is formed with a lower center portion 2 and a sleeve 73 that extends briefly into the third cylindrical body 69.

The inner diameter of the sleeve 73 is smaller than the outer diameter of the hammer 69, and a chamber 74 is formed between the sleeve 73 and the rear end surface of the hammer 69.

The central opening is connected to a source of compressed air by suitable conduit means.

Furthermore, the second cylindrical body 62 is attached to the support plate 75 by, for example, the belt 7.
It is fixed by a mounting means such as 6.

Therefore, the embossing head 30 and the marking section 31 are supported by the support plate 75.

As shown in FIG. 5, the support plate 75 extends below the embossing head 30, and the pin 77 extends downward from a portion located almost directly below the shaft 45 on which the engraving wheel 46 of the embossing head 30 is mounted. It extends to

This pin 77 is pivotally supported by the movable cart 27 as shown in FIG.

Therefore, the embossing head 30 and the marking section 31 are connected to the pin 7.
It can pivot around 7.

Positioning cylinder devices 78R and 78L are provided as shown in FIG. 6 in order to press both sides of the support plate 750 and hold the embossing head 30 and hammer portion 31 in neutral positions.

The positioning cylinder device is attached to the moving trolley 27,
Hemispherical suppressors 79R and 79L provided at the tip of the piston rod press the rear side surface of the support plate 75 away from the pin 77.

These positioning cylinder devices 78R and 78L are designed so that when the engraving head is brought into contact with the machine to be engraved prior to engraving, the engraving head and the marking part are at a small angle around the pin 77, following the surface to be engraved. For example, pressure is released to allow rotation by ±3 degrees, and after stamping is completed, pressure is applied to return the stamping head and hammer to the neutral position.

Next, the character selection machine 3 sets the engraving wheel of the engraving head 30.
5 will be explained with reference to FIGS. 9 and 10.

As shown in FIG. 9, the selection machine 35 includes a gear 81 that meshes with the feed gear 48 of the stamping wheel 46, and a pinion 82 fixed to the gear 81, one for each stamping wheel. 83 and is housed in a casing 84.

A rack 85 that meshes with the pinion 82 is connected to the casing 84.
It is fixed to an output shaft 87 of a digital cylinder 86 attached to.

The rear end of the casing 84 is pivotally supported by a shaft 83 attached to the side columns 32 and 33 at the tip, and the front right side is attached to the tip of a piston rod 89 of the cylinder device 34 as shown in FIG.

FIG. 9 depicts the cylinder device at the front of the casing 84 for convenience of drawing.

Therefore, when the cylinder device 34 is operated from the position shown in FIG. 9 and the casing 84 is rotated upward, for example, 5 degrees around the shaft 88, the gear 81 can be completely separated from the embossing head 31, and the cylinder device When the piston rod 89 of 34 is lowered, the gear 81 moves to the embossing head 31 as shown in FIG.
The rack 85 meshes with the feed gear 48 of each stamped wheel.
That is, by operating the digital cylinder, each marking wheel can be rotated against the locking force of the locking stopper 49 to set a desired character.

The digital cylinder 86 is constructed as shown in FIG.

That is, the piston 92 of the first cylinder 91 has a second cylinder chamber that is twice the size of the cylinder chamber of the first cylinder.
A cylinder 93 is coupled to a piston 94 of its second cylinder 93.

A third cylinder 95 having a cylinder chamber twice the size of the cylinder chamber of the second cylinder 93 is coupled to the piston 96 of the third cylinder 95 and has a cylinder chamber twice the size of the cylinder chamber of the third cylinder 95 and therefore the first cylinder. 8 of 91 cylinder chambers
A fourth cylinder 97 having double the cylinder chamber is connected, and an output shaft 87 is connected to a piston 98 of the fourth cylinder 97.

Each cylinder 91, 93, 95, 97 has a solenoid valve 91.
Pressurized air is supplied via a, 93a, 95a, 97a.

Therefore, the solenoid valve 91a. By selectively opening 93a, 95a, and 97a, it is possible to select 16 different protruding strokes of the output shaft, that is, the moving distance of the rack 85.

An arm 99 is fixed to the output shaft 87, and the arm 99 is adapted to interlock with the sliding piece 101 of the potentiometer 100.

Both ends of the potentiometer are connected to a reference power supply, for example,
The sliding piece is connected to the display 102.

The voltage appearing on the sliding piece of the potentiometer is
The display 102 has a built-in A10 converter, converts the analog voltage value of the potentiometer into a digital value, and digitally displays the 16 positions. preferable.

Therefore, an indicator 102 provided for each marking wheel.
This makes it possible to confirm the position of each marking wheel during character selection.

Next, the operation of the direct acting stamper whose configuration has been explained above will be explained.

First, prior to stamping, the cylinder device 34 is activated to lower the piston rod 39, lowering the character selector 35 above the stamping head 30 as shown in FIGS. 4 and 9, and marking the gear 81. The wheel 46 is brought into mesh with the feed gear 48.

Next, for example, the solenoid valve 91a is pressed by a computer into which a number to be engraved is input.

93a, 95a, 97a are selectively opened, and the power shaft 87
is pushed out momentarily, and the marking wheel 46 is rotated to bring the characters to be stamped to the front.

At this time, the rotation of the marking wheel, that is, the exposed characters can be confirmed on the display 102, and character selection errors and stamping errors can be prevented.

Thereafter, the cylinder device 34 is actuated to push up the piston rod 89 and release the character selection machine 35 from the embossing head 30, thereby completing the character selection operation.

This state is schematically shown in FIG. 11A.

When the character selection operation is completed, actuate the cylinder device 28,
The engraving head 30 supported by the movable cart 27 is brought into contact with the material M to be stamped, such as steel, as shown in FIG. 11B.

Next, compressed air is supplied to the chamber 74 through the open lower part 2 of the hammer part 31, and the hammer 70 collides with the cylindrical body 44 as shown in FIG. The selected characters are stamped.

Even if the stamping surface S of the material M and the front surface of the stamping head are inclined as shown in FIG. 12A at the initial stage of contact of the stamping head with the material M, the material M of the stamping head by the transfer cart is
Due to the pressing force on the pin 7, the embossing head and hammer part
Positioning cylinder device 7 with pressure released around 7
8R and 78L, the marking wheel is brought into close contact with the marking surface S of the material M as shown in FIG. 12B.

Therefore, clear markings are made by the collision of the hammer with the marking head.

Therefore, even if the engraving head is positioned at a slight inclination with respect to the material, a clear engraving can always be made.

As mentioned above, it is sufficient to allow the copying rotation angle α of the embossing head to be at most 3 degrees in one direction, that is, ±3 degrees.

As is clear from the above, in the direct-acting stamper according to the present invention, the character selection machine and the embossing head are configured separately, and the character selection machine is combined with the embossing head only during the character selection operation, and the embossing machine is connected to the embossing head only during the character selection operation. Sometimes it is separated from the embossing head.

Therefore, the impact at the time of stamping is not directly transmitted to the character selection machine, and damage and malfunction of the character selection machine can be prevented.

Furthermore, since no assembly wire is used and the feed gear of the stamping wheel is directly driven, the construction of the stamping head is simple and errors in setting the stamping wheel do not substantially occur.

Furthermore, in the stamper according to the present invention, the hammer is brought into contact with the stamping head after the stamping head is brought into contact with the material to be stamped, thereby making it possible to reduce damage to the built-in parts of the stamping head. .

Further, in the stamper according to the present invention, since the embossing head oscillates around the copying pin 77, even if the embossing surface of the material to be stamped and the embossing head are positioned at an angle to each other, the movable carriage can By pressing the engraving head against the engraving surface, the engraving head rotates following the engraving surface, and all the engraving wheels come into close contact with the engraving surface.

Therefore, clear markings can always be made.

Since the character selection machine is equipped with a display, the character to be set can be confirmed during the character selection operation of the marking wheel, and character selection mistakes can be easily prevented.

Furthermore, since the stamping wheel and the feed gear are integrally forged, damage to the stamping wheel due to impact during stamping can be greatly reduced.

As explained above, the direct acting stamper according to the present invention has excellent effects that solve the conventional problems.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the configuration of a conventional swing arm type stamper, FIG. 2 is a schematic diagram showing the configuration of a conventional direct acting stamper, and FIG. 3 is a schematic diagram showing the configuration of a conventional direct acting stamper. FIG. 4 is a front view showing the embodiment of FIG.
5 is a sectional view of the embossing head and hammer portion shown in FIG. 4; FIG. 6 is a plan view of the embossing head and hammer portion shown in FIG. 5; FIG. is a plan view of the stamping wheel, FIG. 8 is a sectional view of the stamping wheel of FIG. 7, FIG. 9 is a schematic diagram showing the configuration of the character selection machine of FIG. 4, and FIG.
Figure 9 is a schematic diagram showing the configuration of the digital cylinder and display used in the selection machine, and Figures 11A, B, and C are:
The operation explanatory diagrams of the stamper shown in FIGS. 3 and 4, and FIGS. 12A and 12B are operation explanatory diagrams illustrating the tracing rotation of the embossing head. 1... Engraving wheel, 2... Engraving head, 3... Lifting cylinder, 4...
Swing arm, 5... Assembly wire, 6
...Controller, 11...Engraving wheel,
12... Embossing head, 13... Piston rod, 14... Embossing cylinder, 15...
... Assembly wire, 16 ... Control section, 2
1,22゜23... Prop, 24... Guide stand, 25... Abutment, 26... Wheel,
27...Moving trolley, 28...Cylinder device, 29...Piston rod, 30...
Embossing head, 31...Hammer part, 32, 33.
... Side column, 34 ... Cylinder device, 35
・・・・・・Selection machine, 41゜42・・・Side frame, 43・・・Main frame, 44・・・・・・
・Cylindrical body, 45...shaft, 46...engraved wheel, 47...engraved wheel part, 48...
...Feed gear part, 49...Locking stopper,
61, 62, 69... Cylindrical body, 63...
・Flange part, 64... Belleville spring, 65...
...Fixed ring, 66...Flange, 67...
...Screw, 68...Bearing, 70...Hammer, 71...End plate, 72...Central opening, 73...Sleeve , 74...room,
75...Support plate, 76...Belt, 7
7...Bin, 78R, 78L...Positioning cylinder, 79R, 79L...Semispherical pressing body, 81...Gear, 82...・Pinion, 83...shaft, 84...casing,
85...Rack, 86...Digital cylinder, 87...Output shaft, 88...Shaft, 89...Piston rod, 91... ...First
Cylinder, 92...Piston, 92...
・Second cylinder, 94...Piston, 95...
...Third cylinder, 96...Piston, 9
7... Fourth cylinder, 98... Piston, 91a, 93a, 95a, 97a... Solenoid valve, 99... Arm, 100... ...Potentiometer, 101...Sliding piece, 102...
····display.

Claims (1)

[Claims] 1. An engraving head having a plurality of engraving wheels, and a hammer that holds the engraving head so that it can be driven in the engraving direction and collides with the tail of the engraving head to strike the engraving head onto the stamped goods. A character selection machine has a built-in hammer part, a selection gear for selecting the characters stamped on each marking wheel, a piston cylinder that drives the selection gear, and a lifting device at the front of the selection machine during character selection. The front part of the character selection machine is lowered to engage the feed gear of each marking wheel of the embossing head with the character selection gear of the character selection machine, and character selection is performed by the operation of the piston cylinder. a lifting mechanism for lifting the front part of the selection machine using a front lifting device to release the engagement of the stamping wheel of the stamping head with the feed gear; and a movable carriage which supports the marking head so as to be pivotable and allows the marking head to rotate along the marking surface when the marking head is brought into contact with the material to be stamped. Stamper.