JPS6361184B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that automatically stamps serial numbers, etc., during the manufacturing process of mass-produced parts, such as automobile parts. It is an object of the present invention to provide an automatic stamping machine that can perform the stamping process and eliminate the unevenness of the stamping depth.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the structure of the present invention shown in the drawings will be described below.

In Figures 1 to 7, 1 is the part to be engraved;
Reference numeral 2 denotes a drive roller conveyor on which the stamped part 1 is placed and transported; 3 a stopper that receives the front end of the stamped part 1 at the front end of the drive roller conveyor 2; 4 a movable vertically below the terminal end of the drive roller conveyor 2. With a lifter supported by
The link mechanism 8 is activated by the expansion and contraction movement of the piston rod 7 of the lift cylinder 6 attached to the machine frame 5.
A plurality of support columns 9 erected on the upper surface are raised and lowered between the rollers of the drive roller conveyor 2, and the stamped part 1 is lifted and lowered by the support columns 9. I'm doing it like that. In addition, when the lifter 4 is at the lower end, the support column 9 is
Its upper end is sunk below the drive roller conveyor 2 so as not to interfere with its conveyance. 10 is a stamp in which a single stamped character or number is engraved on the lower end surface. For numbers, 10 types of stamps 10 are available from 0 to 9, and for letters, the required number of stamps with the necessary characters are prepared.
These predetermined number of stamps 10 are placed on the stamp head 11 on the disc, and as shown in FIG. They are arranged and held in two rows. The stamp 10 is held by a disk-shaped stamp head 11 so as to be movable only in the vertical direction without rotating, and is always raised and held by a return spring 16. The above disc-shaped stamping head 1
1 is concentrically attached to the lower end of a main shaft 14 that is rotatably supported on a housing 13, and a pulse motor 15
It is designed so that it can be rotated by. That is, the spline shaft 1 has a bevel gear 16 fixed on the main shaft 14, and a bevel gear 17 that meshes with the bevel gear 16, which is rotatably supported on the housing 14 so as to be orthogonal to the main shaft 14.
8, and the spline shaft 18 is fixed to the output shaft 19 of the pulse motor 15.
They are spline-fitted so that they rotate together and can move freely in the axial direction. The pulse motor 15 is driven online from a computer by inputting information from a keyboard, card, tape, or the like. A disk 21 that rotates integrally with the main shaft 14 is attached to the upper end of the main shaft 14, and small holes and the like are provided in this disk at positions corresponding to the stamps 10 held in the disk-shaped stamp head 11, and An optical encoder 22 is provided in the housing 13 in correspondence with the disc 21. That is, the marking head 11 indexes the desired marking element 10 with input supplied to the pulse motor 15, and the optical encoder 22 confirms this. An engraving punch 23 is provided above the stamp 10 to be indexed, and is configured so that an engraving operation is applied to the stamp 10 by an engraving cylinder 24 via the stamp punch 23. There is. That is, case 1
A bracket 25 is fixedly installed on the front surface of the plate 3, and a punch 23 is attached to a support shaft 26 that is mounted on the bracket 25.
is pivotally mounted within the swinging range between the stopper 27 attached to the bracket 25 and the adjustment bolt 23, and the stamping cylinder 24 is vertically mounted downward on the upper surface of the machine frame 5. An engraving hammer 30 is integrally fixed to the end of the piston rod 29 of the engraving cylinder 24, and when the piston rod 29 of the engraving cylinder 24 is extended, the engraving hammer 30 swings the engraving punch 23 and makes an impression. The head of the stamp 10 of the disk-shaped stamp head 11 indexed by the engraving punch 23 is struck, and the stamp 10 is pressed against the return spring 12 to stamp. The printing depth for each character is adjusted by a marking depth limiting block 31 provided below the stamp 10 to be indexed and corresponding thereto. That is, as shown in FIG. 7, the printing depth limiting block 31 is provided with an engraving window 32 having a space corresponding to the serial number, etc., and each stamper 10 is provided with an engraving window 32 of the printing depth limiting block 31. A flange portion 33 is provided to be hooked to the periphery of the stamp 32 to prevent the stamp 10 from protruding beyond a certain level from the lower surface of the printing depth limiting block 31. This eliminates the problem that the depth of the engraved characters differs depending on the type of character even if the same pressing force is applied because the engraved area differs depending on the type of character of each stamp 10, Eliminates unevenness in printing depth due to the area of the characters to be engraved. The above printing depth restriction block 31
is regulated within the swinging range between a stopper 36 and an adjustment bolt 37 attached to the suspension rod 34 on a support shaft 36 supported at the lower end of the suspension rod 34 suspended from the upper part of the machine frame 5. The stopper plate 38 is integrally attached to the free end of the stopper plate 38, which is pivotably mounted so that when the stamped part 1 is lifted by the lifter 4, even if the stamped surface comes into contact with the part 1, it does not interfere with lifting. There is. The pulse motor 15 is integrally fixed to the machine frame 5, and the housing 1, which rotatably supports the disc-shaped marking head 11 via the main shaft 14, is integrally fixed to the movable base 39. ing. The movable base 39 is slidably mounted on sliding guide rods 41, 41 installed between side plates 40, 40 suspended on both sides of the upper part of the machine frame 5,
In addition, a nut 43 screwed onto a ball screw 42 which is rotatably supported in parallel with the sliding guide rods 41, 41 is attached to a support base 44 fixed on the movable base 39 so as not to rotate but in the axial direction. The output shaft 4 of the pulse motor 45 is fixed to the upper side of the machine frame 5 while being held so that it does not move.
A ball screw 42 is integrally connected to 6. That is, when the ball screw 42 is rotated by the pulse motor 45, the ball screw 42
Due to the threaded relationship between the screws and the nuts 43, a moving force in the axial direction is applied, and as a result, the movable base 39 slides with respect to the machine frame 5 along the sliding guide rods 41, 41. The pulse motor 45 is driven by input from a servo board, card, tape, or the like. Further, a spur gear 47 is fixed to the output shaft 46 of the pulse motor 45, and a spur gear 48 meshing with the spur gear 47 is rotatably supported by a bracket 49 fixed to the machine frame 5. At the same time, a disk 50 that rotates integrally with the spur gear 48 is attached, a small hole etc. is provided in this disk 50 for detecting the rotational position, and a hole is provided in the bracket 49 corresponding to this disk 50. An optical encoder 51 is provided. That is, the ball screw 42 slides the movable base 39 to a desired position by input supplied to the pulse motor 45, and the optical encoder 51 confirms this.

Next, the overall operation and operation of the apparatus of the present invention in the above configuration will be explained using as an example the case where serial numbers such as ABC123456 are stamped in two rows on the stamped surface of the stamped part 1. .

First, the stamped part 1 conveyed by the driving roller conveyor 2 has its front end stopped at the stopper 8 at the terminal end of the driving roller conveyor 2.
Stop when it hits. Next, lift cylinder 6
is actuated to extend the piston rod 7, and the extension of the piston rod 7 pushes up the lifter 4 via the link mechanism 8. Then, a plurality of support columns 9 erected on the upper surface of the lifter 4 rise between the rollers of the drive roller conveyor 2, and the plurality of support columns 9 are stopped by the stopper 3 at the terminal end of the drive roller conveyor 2. The stamping preparation is completed by lifting up the stamped part 1, which is being marked, until its upper stamping surface comes into contact with the lower surface of the printing depth limiting block 31. When preparations for stamping are completed, input is first made to the pulse motor 15 using a keyboard or the like, and the pulse motor 15 rotates the stamp head 11 to a predetermined index position to limit the printing depth of the stamp 10b with the English letter "A". index on block 31. At this time, "A"
The stamp 10b corresponds to the upper left end of the upper row of the stamping window 32 of the printing depth limiting block 31 in FIG. When the indexing operation is completed, the optical encoder 22 detects and confirms the position of the small hole provided in the disk 21. If there is an abnormality in the indexing, the marking operation is prohibited and the indexing is performed normally. In this state, the stamping cylinder 24
is activated to give the stamping action. Then, the piston rod 29 of the engraving cylinder 24 extends, and the engraving hammer 30 attached to the end of the piston rod 29 swings the engraving punch 23.
In Step 3, the letter "A" is struck on the stamping element 10b of "A" to stamp the English letter "A" on the stamped surface of the stamped part 1. After that, the pulse motor 15 moves to the next alphabetic letter "B".
The stamped character 10b having the index is indexed, and in parallel with this, the pulse motor 45 moves the movable table 39 one pitch to the right in FIG. 4 via the ball screw 42 and the nut 43. This pitch corresponds to the desired pitch between stamped characters.
Then, the stamp 10b of "B" corresponds to the position moved one pitch to the right from the previously stamped English letter "A", and after the index is confirmed, the stamp cylinder 24 The stamping element 10b of "B" is struck through the stamping punch 23 to stamp an English character on the stamped surface of the stamped part 1. English letter "B"
When the engraving is completed, the next alphabetic letter "C" is stamped in the same manner as the English letter "B". When the upper row of English letters "A", "B", and "C" have been stamped in this way, the pulse motor 15 indexes the stamp 10a with the number "1", and in parallel, the pulse motor 15 indexes the stamp 10a with the number "1". The motor 45 returns the movable base 39 to the left in FIG. 4 by a predetermined amount. Then, the character stamp 10
b and the number stampers 10a are placed separately on the stamping head 11 with different circumferential diameters.
The indexed stamp 10a with the number "1" corresponds to the upper left end of the lower row of the stamping window 32 of the engraving depth limiting block 31, and after this, the number "1" is stamped in the same way as for the upper row of alphabetic characters. 1”, “2”, “3”,
"4", "5", and "6" are stamped one after another until the desired stamping is completed. When the desired marking is completed, the lift cylinder 6 is operated and its piston rod 7 is retracted, and the retraction of the piston rod 7 pushes down the lifter 4 via the link mechanism 8 and stands it on the upper surface of the lifter 4. The stamped parts 1 placed on the support posts 9 are returned to the drive roller conveyor 2, and the stamped parts 1 are moved to a predetermined position on the drive roller conveyor 2. Transport to location. Along with this, movable platform 3
9 is returned to its original position before stamping by the pulse motor 45. Thereafter, the above-described operations and operations are repeated, and stamping is performed on the parts 1 to be stamped one after another.

A major feature of the present invention is that stampers 10 engraved with a single stamped character or number are held in a stamping head 11 in two rows with different circumferential diameters. As a result, double-row stamping can be performed with the minimum necessary drive mechanism,
The device can be made smaller and save energy. Furthermore, the printing depth limiting block 31 can eliminate unevenness in printing depth due to the area of characters to be printed.

The present invention as described above includes a stamping head equipped with many types of stamps having a single character, etc., and an indexer for indexing desired stamps of the stamping head correspondingly on the stamped surface of a stamped part. A stamping cylinder that stamps a correspondingly indexed stamp on the stamped surface of the stamped part, and a stamping head that moves the stamping head in the direction of arrangement of stamped characters with respect to the stamped surface of the stamped part. It consists of a pitch feed pulse motor that feeds one pitch at a time, and the index pulse motor performs the index operation and the pitch feed pulse motor performs the pitch feed operation in parallel and intermittently, and during the pause, the stamping cylinder is operated. In an automatic stamping machine that performs stamping in relation to each other, stampers are held in a disc-shaped stamping head in multiple rows with different circumferential diameters arranged at equal intervals around the circumference. At the same time, a block for limiting the printing depth is provided, which has a window that locks the flange provided on the stamp at the periphery and prevents the stamp from descending beyond a certain level. This can be done with the minimum necessary drive mechanism, which has advantages such as miniaturization of the device and energy saving. Furthermore, the presence of the printing depth limiting block made it possible to eliminate uneven printing depth due to character area.

[Brief explanation of drawings]

FIG. 1 is a front view of the entire automatic stamping machine according to the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a plan view thereof. In addition, Figure 4 is an enlarged vertical sectional side view of the main part, Figure 5
Figure 6 is a partially sectional front view, Figure 6 is a partially sectional plan view, Figure 7 is a detailed view of the disc-shaped marking head and printing depth limiting block, and Figure 8 is a detailed view of the marking depth. It is an enlarged view of the stamping part of the stamped surface of the stamped part showing an example. DESCRIPTION OF SYMBOLS 1... Part to be stamped, 4... Lifter, 6... Lift cylinder, 10... Stamp element, 11... Disc-shaped stamping head, 15... Pulse motor, 23
... Stamping punch, 24 ... Stamping cylinder, 30
...Engraving hammer, 31...Printing depth limiting block, 32...Engraving window, 39...Movable base, 42...
...Ball Screw, 43...Natsuto, 45...
pulse motor.

Claims (1)

[Claims] 1 A stamping head equipped with many types of stamps having a single character, etc., an index pulse motor that indexes the desired stamp of the stamping head on the stamped surface of the part to be stamped, and a An embossing cylinder that embodies indexed stamps corresponding to the engraving surface, and a pitch feed pulse motor that sends the engraving head one pitch at a time in the direction in which the stamped characters are arranged on the stamped surface of the stamped part. The indexing operation of the index pulse motor and the pitch feeding operation of the pitch feed pulse motor are performed intermittently in parallel, and during the pauses, the engraving cylinder is operated so as to perform engraving. In an automatic stamping machine, stampers are arranged and held at equal intervals around the circumference in multiple rows with different circumferential diameters in the stamping head on a disk, and stampers are placed on the stamper at the periphery. An automatic stamping machine characterized by being provided with a printing depth limiting block having a window with which a flange is hooked to prevent the stamp from descending beyond a certain level.