JPH0731346U - Pipe end printing device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a pipe end printing device capable of surely printing on the end face of a pipe material and capable of obtaining clear marking or printing by repeatedly pressurizing the end face. . [Arrangement] A device for printing on the end surface of a pipe material, which is provided with an encoder for detecting the rotation angle of a rotating body, and which has a fixing function of the pipe material, and is installed at a position where the end surface of the pipe material can be coined. A pipe end printing device comprising a stamp provided with an encoder for detecting a rotation angle of the stamp and a pressurizing device for pressurizing the stamp against the end surface of the pipe.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for printing on the end surface of a pipe material.

[0002]

[Prior art]

 In the past, as a device for printing on the end surface of a pipe material, a printing plate or a stamp plate having a convex mark on a flat plate or a disk was generally used for printing and pressing on the end surface of a rotating pipe material. Further, as a device for printing with a small pressurizing force when printing and pressing the stamp plate or stamp on the end surface of the rotating pipe material, there is a device that presses the same portion a plurality of times to gradually obtain the depth.

[0003]

[Problems to be solved by the device]

 However, in the case of printing on the end surface of the pipe material, there is a problem that a large power unit is necessary because the pressure applied by the printing plate or the printing plate must be increased in order to obtain the printing depth. As a device for printing with a small pressing force, there is a device that presses the same position on the end surface of the pipe material multiple times to gradually obtain the depth, but when printing on the end surface of the pipe material, the circumference of the pipe and the circumference of the printing Since there is a difference in length, there is a problem that it is difficult to control the position so as to specify the printing point.

Further, in the case of printing different printing bodies on pipe materials having different diameters, there has been a problem that a complicated and inefficient device such as replacing a printing plate or a printing plate is required. An object of the present invention is to provide a tube end printing device that solves the above problems.

[0005]

[Means for Solving the Problems]

 The present invention is an apparatus for printing on the end surface of a pipe material, which has an encoder for detecting the rotation angle of a rotating body and a rotating body having a fixing function for the pipe material, and a printing plate installed on the end surface of the pipe material at a position capable of coining. It is a tube end printing device including a stamper provided with an encoder for detecting the rotation angle of the stamper, and a pressurizing device for pressing the stamper against the end surface of the tubular member.

[0006]

[Work]

 According to the pipe end printing apparatus of the present invention, the peripheral speed difference between the pipe material and the stamp is eliminated, and printing is performed on the end surface of the pipe material by controlling so that the time of one revolution of both is the same. It is possible to reliably print on the end face, and it is possible to repeatedly stamp on the end face to obtain clear markings and prints.

Namely, as shown in FIG. 2 (a), the time of the reference point S ₁ during the passage of the tube 1 and T _0, back to the original reference points S ₁ and around from the reference point S ₁ time to and shall be the T _E at the time was, T _E -T ₀ is the time required for the round. In addition, if the time of the stamp 2 when passing through the reference point S ₂ is T _0, and the time of returning from the reference point S ₂ to the original reference point S ₂ is T _E , then T _E -T ₀ is the time required for one round.

That is, the time T _E −T ₀ required for one round of the pipe material 1 and the stamp 2 is set to be the same. Here, T ₁ and at the beginning of the printing time of the printing 3 mark plate 2, when the at the end and T _2, the print time is T ₂ ─T _1. Of course, the printing time of the tube material 1 is the same time. FIG. 2 (b) is a trajectories of the peripheral speeds of the pipe material 1 and the stamp 2 at different times of rotation. The time T is plotted on the horizontal axis and the peripheral velocity V is plotted on the vertical axis. V ₁ is the peripheral velocity of the pipe material, V ₁ is the peripheral velocity line of the pipe material, and T ₀ is the passage time of the reference point of the pipe material. , T _E represents the passing time of the reference point after one round.

On the other hand, since the perimeter of the stamp 2 is shorter than that of the pipe material due to the difference in radius, the printing time T is set in order to avoid the deviation of the printing 3.₁→ T₂Peripheral speed V of the stamp between_HIs the peripheral velocity V of the pipe material 1. ₁ Control to match. In addition, in order to match the one-round time, (S₂→ T₁And T₂→ S ₂ ) V is calculated from the circumferential difference of the stamp_LBy rotating with, the speed difference at the time of printing is eliminated, and by matching the one-round time, clear printing at the same point can be performed multiple times.

Further, T in FIGS. 2 (a) and 2 (b)₁Point, T₂When the speed control at points was performed in time, it became impossible to absorb the error due to the inertial force of the motor, so the control was performed at each angular speed. That is, as shown in the schematic view of FIG. 3, from the arc length l of the pipe 1 corresponding to the length l of the stamped portion of the stamp 2, the angle θ with respect to the rotation center of the stamp 2 is calculated.₂(L / 2πr₂) And the angle θ with respect to the center of rotation of the pipe material 1₁(L / 2πr₁), The printing portion θ of the stamp 2 ₂ Angular velocity ω_HAnd rotate the other parts at angular velocity ω_LIt is possible to reliably synchronize the one-round time of the pipe material 1 and the stamp 2 by correcting the angular velocity at the rotational position of the encoder that detects both rotations while rotating at 1.

[0011]

【Example】

An embodiment of the method of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view showing a tube end printing apparatus of the present invention. Reference numeral 4 is a rotating body that rotates at a low speed and has a function of fixing the pipe material, 5 is an encoder that detects the rotation angle of the rotating body 4, 6 is an end face of the pipe material, 7 is an encoder that detects the rotation angle of the stamp 2, and 8 is a print mark. A pressurizing device that presses the board 2 against the end surface 6 of the pipe material, 9 is a printing point of the pipe material 1, 10 is a center line of the pipe material 1, 11 is a reference line of the printing point 9 of the pipe material 1, and r ₁ is the pipe material 1 The distance from the center line 10 to the reference line 11, r ₂ is the radius of the stamp 2.

First, the distance r ₁ from the center of the pipe material 1 to the reference line 11 is read by a magnet scale (not shown) so that the peripheral speed of the printing point 9 of the pipe material 1 and the peripheral speed of the stamp 2 match. 5 and the encoder 7 detect the rotation angle of the rotating body 4 and the rotation angle of the stamp 2 to correct the angular velocity, and surely synchronize the one rotation time of the rotation of the rotating body 4 and the stamp 2 to the end surface of the pipe material 1. 6 was printed.

Further, in order to obtain the depth of marking on the pipe material 1 or the sharpness of printing, the stamp 2 was pressed against the end surface 6 of the pipe material 1 by the pressing device 8. Further, when the end surface 6 of the tube material 1 is angled, the stamp 2 is adjusted to that angle, the distance r ₁ is corrected, and printing is performed on the end surface 6 of the tube material 1. By the apparatus described above, the printing operation on the end surface 6 of the pipe material 1 is automatically performed, and by setting a plurality of stamps 2, it becomes possible to perform various printing.

[0014]

[Effect of device]

 As described above, according to the pipe end printing device of the present invention, it is possible to reliably print on the end face of the pipe material, and it is possible to repeatedly engrave the end face with a small power to make clear markings. Since the printing can be obtained, the pipe end printing device used can be downsized and the equipment cost can be reduced.

[Brief description of drawings]

FIG. 1 is a side view showing a tube end printing apparatus of the present invention.

FIG. 2 (a) is an explanatory diagram showing a round time of a pipe material and a stamp and a passing time of a printing unit. (b) It is explanatory drawing which shows the peripheral speed control method of a pipe material and a stamp.

FIG. 3 is a schematic diagram showing angular velocities of a stamp and a pipe material.

[Explanation of symbols]

 1 Tubular material 2 Stamp 3 Printing 4 Rotating body 5 Encoder 6 End surface of tubular material 1 Encoder 8 Pressurizer 9 Printing point of tubular material 10 Center line of tubular material 11 Reference line of printing point 9 of tubular material 1

Claims (1)

[Scope of utility model registration request] 1. An apparatus for printing on an end surface of a pipe material, comprising an encoder for detecting a rotation angle of a rotating body and a rotating body having a fixing function of the pipe material, and a printing plate installed at a position capable of coining on the end surface of the pipe material. Tube end printing device comprising a stamper provided with an encoder for detecting the rotation angle of the stamper, and a pressurizing device for pressurizing the stamper against the end surface of the pipe material.