JP2005305475A - Vibration pen of marking device, and stylus for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration pen of a marking device having a stylus which is capable of stamping a letter, a numeral, a mark or the like on a part of high hardness with a style of high quality, and has much longer lifetime than that of a known one. <P>SOLUTION: The vibration pen 1 for the marking device comprises a cylinder 2, a piston 3 freely reciprocally mounted on the cylinder 2, a stylus 4 mounted on a tip side of the piston 3, and a vibration means 5 which is provided on a base end side of the piston 3 to vibrate the piston 3 in the longitudinal direction. The stylus 4 comprises a stylus body connected to the piston 3, and a stamping body which is mounted on the tip side of the stylus body to stamp a work and formed of a poly-crystal diamond sintered body or cubical crystal boron nitride. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vibration pen for a marking device and a stylus of a vibration pen for a marking device, and in particular, a vibration for a marking device used for imprinting a two-dimensional code, a lot number, etc. on a high-hardness machine part or the like. It is about a pen.

  Marking devices are used for marking alphanumeric characters such as lot numbers and countermarks in automated factories such as automobiles and construction machines. For example, a conventional marking device shown in Patent Document 1 below is schematically configured from a stylus having a stamped portion made of a cemented carbide at the tip, and a vibration means such as an ultrasonic vibration device that vibrates the stylus in the longitudinal direction. A stamping machine and a driving device for moving the stamping machine in the XY directions are attached. In order to print on a mechanical part using this marking device, first, the stamped portion of the stylus tip is pressed against the marked portion of the mechanical component, and then the stylus is vibrated by the vibration means, and the stylus is driven by the driving device. Move with each stamping machine. By this operation, a groove is formed along the locus of the stylus on the surface of the marking portion of the machine part. In this way, letters, numbers, symbols, etc. can be marked on the marking parts of the machine parts. Further, when the stylus is vibrated at one place, dots are formed at that portion, so that a so-called two-dimensional code can be formed by forming a plurality of dots in a predetermined pattern.

Recently, the international distribution of machine parts on a computer network has become increasingly popular, and accordingly, establishment of a globally common quality standard for machine parts is desired. For this reason, standards such as ISO9000 and ISO / TS16949 have been established led by the International Organization for Standardization, and companies that adopt this international standard are rapidly increasing. Particularly in the automobile field, it is required to record the manufacturing history of the manufacturing date of the part, the factory where it was manufactured, etc. on all the automobile parts. For this reason, the amount of characters to be engraved on automobile parts has increased dramatically, and it is desired to extend the life of the vibration pen for a marking device.
JP 2003-39112 A

As described above, the conventional vibration pen for a marking device has a stylus tip made of a cemented carbide, so that it has a sufficient life for relatively low hardness parts such as aluminum parts and soft iron parts. . However, there are parts made of high-hardness materials, such as gears, in automobile parts, and when the letters or the like are engraved on such high-hardness parts using a conventional marking machine, the tip of the stylus wears rapidly. There was a problem that only a few to a dozen characters could be engraved.
For this reason, means for applying various coatings to the tip of the stylus by applying the coating technology in the technical field of conventional cutting tools has been studied, but the coating is immediately applied by the impact when the stylus is stamped on the part. There was a problem that the life of the vibration pen for the marking device could not be extended due to peeling.

  The present invention has been made in view of the above circumstances, and is capable of imprinting letters, numbers, marks, etc., on high-hardness parts with a high-quality typeface, and a stylus that has a much longer life than conventional ones. An object of the present invention is to provide a vibration pen for a marking device.

In order to achieve the above object, the present invention employs the following configuration.
The marking device according to the present invention includes a cylinder, a piston reciprocally attached to the cylinder, a stylus attached to a distal end side of the piston, a proximal end side of the piston, and the piston in a longitudinal direction thereof. And a stylus body connected to the piston, and a polycrystalline diamond sintered body that is attached to a tip side of the stylus body and stamped on a workpiece. Alternatively, it is characterized by comprising a stamped body made of cubic boron nitride.
The vibration pen for a marking device of the present invention is the vibration pen for a marking device described above, wherein a washer is joined to a tip of the stylus body, and the stamped body is brazed to the washer. And
In addition, the vibration pen for a marking device according to the present invention is the vibration pen for a marking device described above, wherein the stamped body has a substantially conical shape.

  Next, a stylus of a vibration pen for a marking device according to the present invention is a stylus used for a vibration pen for a marking device that makes a tip of a workpiece to be engraved while vibrating the stylus. It is characterized by comprising a polycrystalline diamond sintered body or a stamped body made of cubic boron nitride which is attached to the front end side and stamped on a workpiece.

Moreover, the stylus of the vibration pen for a marking device of the present invention is the stylus of the vibration pen for a marking device described above, wherein a washer is joined to the tip of the stylus body, and the stamped body is brazed to the washer. It is characterized by being.
Moreover, the stylus of the vibration pen for a marking device according to the present invention is the stylus of the vibration pen for a marking device described above, wherein the stamped body has a substantially conical shape.

  According to the above configuration, the stylus tip is provided with a stamped body made of polycrystalline diamond sintered body or cubic boron nitride, and this stamped body is more than the conventional stylus tip made of cemented carbide. Since it is excellent in wear resistance and Knoop hardness, it can be engraved several thousand times as much as a conventional stylus, and the life of a vibration pen for a marking device can be extended.

  Further, by joining the stylus body and the stamped body via the washer, the washer functions as a cushioning material at the time of stamping, so that the stamped body can be prevented from being damaged.

  Furthermore, since the stamped body is formed in a substantially conical shape, even if it is moved in any direction while the stylus is pressed against the workpiece, the stamped body is damaged, and the stamped body is damaged. There is no fear of this, and the life of the marking pen vibration pen can be extended.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic cross-sectional view of a marking device vibration pen according to the present embodiment, and FIG. 2 is an enlarged view of a tip portion of a stylus provided in the marking device vibration pen.

  As shown in FIG. 1, the marking device 1 of the present embodiment includes a cylinder 2, a piston 3 that is reciprocally attached to the cylinder 2, a stylus 4 that is attached to the distal end side of the piston 3, A vibration part (vibration means) 5 that is provided on the base end side and vibrates the piston 3 in the longitudinal direction thereof, and a compression spring 6 that biases the piston 3 toward the vibration part 5 are schematically configured. .

  The cylinder 2 is a hollow cylindrical member having a tapered front end, and a tapered sleeve 2a for guiding the piston 3 is provided on the distal end side, while a vibrating portion 5 is provided on the proximal end side of the cylinder 2. ing. A sleeve hole 2b is provided in the sleeve 2a from the distal end side to the proximal end side of the cylinder 2, and a piston 3 is inserted into the sleeve hole 2b. Further, a partition wall 2c is formed near the base end of the cylinder 2, and a cylinder chamber 2A is formed in the cylinder 2 near the tip end and a compressed air chamber 2B is formed near the base end by the partition wall 2c.

The piston 3 includes a rod-shaped rod 3a portion, a disc portion 3b attached to the proximal end side of the rod portion 3a, and a circular convex portion 3c having a smaller diameter than the disc portion 3b protruding from the disc portion 3b. It is comprised and is accommodated in the cylinder chamber 2A of the cylinder 2. Side 3b ₁ of the disk portion 3b is freely sliding with respect to the inner wall surface 2A ₁ to face the inner wall surface 2A ₁ of the cylinder chamber 2A. Further, the distal end side of the rod portion 3a is reciprocally inserted into the sleeve hole 2b of the sleeve 2a. With this configuration, the piston 3 is reciprocally accommodated in the cylinder chamber 2A. Further, a compression spring 6 is disposed between the sleeve 2a of the cylinder 2 and the disc portion 3b of the piston 3, and the compression spring 6 biases the disc portion 3b toward the partition wall 2c, whereby the entire piston 3 is urged. Is urged toward the partition wall 2c of the cylinder 2.

Next, a rubber O-ring 3d is fitted into the circular convex portion 3b of the piston 3, and the O-ring 3d is locked by the disc portion 3b. The partition wall 2c of the cylinder 2 to the base end side of the piston 3 is arranged, through-hole 2c ₁ is provided in several places in the partition wall. When the piston 3 is urged in the partition wall 2c side of the cylinder 2 by the compression spring 6, O-ring 2d is a through hole 2c ₁ and the O-ring 2d is positioned such that the through-holes 2c ₁ is closed by the Yes. As described above, the compressed air chamber 2B is formed between the partition wall 2c and the cylinder base end wall 2e. The compressed air chamber 2B is circulated with an external cylinder 2 through the connecting hole 2e ₁ provided at the proximal end wall 2e, also being in fluid communication with the cylinder chamber 2A of the cylinder 2 through a plurality of through-holes 2c ₁ Yes. The compressed air not shown in the control unit through a connection hole 2e ₁ is adapted to be supplied to the compressed air chamber 2B. The compressed air chamber 2B, the partition wall 2c, the through-hole 2c ₁ , the O-ring 2d, the disk portion 2c, and the compression spring 6 constitute a vibrating portion 5.

  Next, a stylus 4 is attached to the distal end side of the rod portion 3 a of the piston 3. As shown in FIG. 2, the stylus 4 includes a stylus main body 4a connected to the rod portion 3a of the piston 3, and a stamped body 4b attached to the distal end side of the stylus main body 4a and stamped on the workpiece. It is roughly composed. Also, a washer 4c is joined to the tip of the stylus body 4a, and a stamped body 4b is brazed to the washer 4c. The stamped body 4b is formed in a substantially conical shape.

  The stylus body 4a is made of, for example, cemented carbide, steel, or soft iron. The washer 4c is made of, for example, a class G No. 1 cemented carbide composed of W: 89 mass% to 92 mass%, Co: 3 mass% to 5 mass%, and C: 5 mass% to 7 mass%. Yes. Further, the stamped body 4b is composed of a polycrystalline diamond sintered body or cubic boron nitride. As the brazing material for brazing the washer 4c and the stamped body 4b, a silver brazing material made of, for example, Ag: 50% by mass, Cu: 30% by mass, and Zn: 20% by mass is used. The washer 4c is not limited to the above material, and any material may be used as long as it is a cemented carbide. By using a washer made of a cemented carbide, the stylus body 4a can be protected.

Next, operation | movement of the vibration pen 1 for marking devices of this embodiment is demonstrated. First, the stylus 4 is positioned on the processing surface of the workpiece. Next, compressed air is supplied to the compressed air chamber 2B from a control unit (not shown). When compressed air is supplied, the pressure inside the compressed air chamber 2B increases. Exceeds a certain value the pressure, a pressure greater than the urging force of the compression spring 6 is applied against the O-ring 2d that closes the through-hole 2e _1. As a result, the O-ring 2d is pushed down, and accordingly, the piston 3 biased by the compression spring 6 is pushed down toward the tip side of the cylinder 2. At this time, the through hole 2c1 of the compressed air chamber 2B is in an “open” state.
Subsequently, the air compressed in the compressed air chamber 2B flows into the cylinder chamber 2A through the through-hole 2c1 that is “open”. Then, the pressure in the compressed air chamber 2B decreases, the piston 3 is again urged toward the partition wall 2c by the compression spring 6, and the through-hole 2c1 is in a “closed” state by the O-ring 2d. As a result, the pressure in the compressed air chamber 2B rises again.

  By repeating the above operation, the piston 3 and the stylus 4 reciprocate at a constant cycle. By pressing the stylus 4 that reciprocally vibrates against the work surface of the work piece, dots are formed on the work surface. By forming a plurality of dots, a two-dimensional barcode is marked on the surface to be processed. Further, when the vibrating stylus 4 is moved while being pressed against the surface to be processed, a groove is formed along the movement locus. By arbitrarily controlling the moving direction of the stylus 4, it is possible to mark numbers, characters, symbols, and the like on the surface to be processed.

  By adopting a polycrystalline diamond sintered body or cubic boron nitride excellent in wear resistance and Knoop hardness as the material of the stamped body 4b, for example, even a hard material having an HRC hardness of about 50 to 60 is hit. The engraving can be performed, and the amount of wear of the engraving body itself is small, which makes it possible to extend the life of the stylus. In particular, it is possible to secure a number of times of stamping that is several thousand times that of a stylus made of a conventional cemented carbide. Further, by using a polycrystalline diamond sintered body having high strength in all directions, a long-life stylus with fewer chips and cracks than that of single crystal diamond can be realized.

  Further, since the stylus body 4a and the stamped body 4b are joined via the washer 4c, the washer 4c functions as a cushioning material at the time of stamping, and damage to the stamped body 4a can be prevented.

  Further, since the stamped body 4b is formed in a substantially conical shape, a uniform stress is applied to the stamped body 4b regardless of which direction the stylus 4 is pressed against the workpiece. There is no possibility that the body 4b is damaged, and the life of the vibration pen for the marking device can be extended. Further, since the stamped body 4b has a substantially conical shape, the impact at the time of stamping is evenly applied to the entire joining surface of the stamped body 4b and the washer 4c, and the impact is not concentrated on a specific portion and is stamped. Damage to the body 4b can be prevented.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made. For example, instead of the vibration unit 5 described above, an ultrasonic vibration device may be attached.

  A washer having a diameter of 2 mm and a thickness of 1 mm was joined to a stylus main body having a diameter of 3 mm, and a conical stamping body having a diameter of 1 mm and a height of 0.5 mm was joined to the washer via a brazing material. The material of the stylus body was stainless steel or cemented carbide, the material of the washer was class 1 cemented carbide, and the material of the stamped body was a polycrystalline diamond sintered body. The polycrystalline diamond sintered body was obtained by sintering diamond grains with a sintered material such as cobalt. Thus, the stylus of Example 1 was manufactured.

  A stylus of Comparative Example 1 was manufactured in the same manner as in Example 1 except that the material of the entire stylus was a super hard material made of stainless crotch. The dimension and shape of the stylus of Comparative Example 1 were the same as the overall shape of the stylus of Example 1 including the stylus body, washer, and stamped body.

  The styluses of Example 1 and Comparative Example 1 were each attached to the vibration pen for a marking device shown in FIG. 1, and a marking test was performed to investigate the wear amount of the stamped body (stylus tip). The conditions of the marking test are as follows: the workpiece is made of a high hardness material having an HRC hardness of 58-60, and the marking character is to mark the number “01234456789” repeatedly in an arc shape, the height of the number is 5 mm, The feed pitch angle was 2.8 °, the marking speed was 2000 mm / min, the pressure of the supplied compressed air was 0.4 MPa, and the vibration frequency of the stylus was 200 Hz. FIG. 3 shows the relationship between the amount of wear at the stylus tip and the number of marked characters.

As shown in FIG. 3, in the stylus of Example 1, the amount of wear at the stylus tip is only about 13 μm even if the number of marked characters exceeds 14,000, and the marked number itself is very clear. It shows good punchability.
On the other hand, the stylus of Comparative Example 1 shows that the wear amount exceeds 20 μm just by marking about 14 characters.
Thus, it can be seen that the stylus of Example 1 has a life of 1000 times or more that of the stylus of Comparative Example 1.

FIG. 1 is a schematic cross-sectional view showing a vibration pen for a marking device according to an embodiment of the present invention. FIG. 2 is an enlarged schematic view showing a tip portion of a stylus provided in the marking device vibration pen of FIG. 1. FIG. 3 is a graph showing the relationship between the amount of wear at the tip of the stylus and the number of characters formed by stamping.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vibrating pen for marking apparatuses, 2 ... Cylinder, 3 ... Piston, 4 ... Stylus, 4a ... Stylus main body, 4b ... Stamped object, 4c ... Washer, 5 ... Vibrating part (vibrating means)

Claims (6)

A cylinder, a piston reciprocally attached to the cylinder, a stylus attached to the distal end side of the piston, and vibration means provided on the proximal end side of the piston to vibrate the piston in its longitudinal direction. Comprising
The stylus includes a stylus body connected to the piston, and a stamped body made of a polycrystalline diamond sintered body or cubic boron nitride that is attached to the distal end side of the stylus body and stamped on a workpiece. A vibration pen for a marking device.   The vibration pen for a marking device according to claim 1, wherein a washer is joined to a tip of the stylus body, and the stamped body is brazed to the washer.   The vibration pen for a marking device according to claim 1, wherein the stamped body has a substantially conical shape. It is a stylus used in a vibration pen for a marking device that stamps the tip of a workpiece while vibrating the stylus.
A vibration for a marking device comprising: a stylus main body; and a stamped body made of a polycrystalline diamond sintered body or cubic boron nitride that is attached to the tip side of the stylus main body and stamped on a workpiece. Pen stylus.   The stylus of the vibration pen for a marking device according to claim 4, wherein a washer is joined to a tip of the stylus body, and the stamped body is brazed to the washer. The stylus of the vibration pen for a marking device according to claim 4, wherein the stamped body has a substantially conical shape.

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