JPS62271692A - Method of fixing slitter cutter cutting blank to columnar shaft - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] 3. Detailed description of the invention [Public funds for industrial use] The present invention is made of tinplate, TFS, which is a material for metal can bodies.

A method of attaching a slitter cutter to a cylindrical shaft in a device that cuts thin plates such as aluminum into pieces of a predetermined width using multiple slitter cutters fitted at appropriate intervals on a cylindrical shaft to form blanks for can bodies. Regarding.

[Conventional technology]

A commonly used blank cutting device is shown in Fig. 1, in which two cylindrical shafts 2,
3 are mounted vertically, and each cylindrical shaft 2, 3 has a
Slitter cutters 5 attached to the outer periphery of one side of the boss 4 are fitted at appropriate intervals. Then, by the butt-sliding action of the slitter cutters 5 corresponding to the upper and lower sides, the tinplate plate 6 that is sent is cut, and a blank for the can body (not shown) is cut.
It was designed to obtain the following. In this way, since a plurality of slitter cutters for cutting blanks are fitted at predetermined positions on a cylindrical shaft via bosses, conventionally, simple structural means have been adopted. That is, (a) Fixing means using a keyway As shown in FIG. 3, a keyway is provided in the axial direction of the cylindrical shaft and the boss, the keyway of the cylindrical shaft is fitted, and the boss is prevented from rotating using this key as a guide. After fitting and setting the boss at a predetermined mounting position, the tip of the tightening port screwed onto the boss is pressed into contact with the key, and the boss is fixed to the cylindrical shaft.

In such a key locking structure, since the slitter cutter is attached over approximately the entire length of the cylindrical shaft, it is necessary to form the keyway over approximately the entire length of the long cylindrical shaft. Machining such a long keyway not only requires advanced technology and processing processes, but also the contact area between the boss and the cylindrical shaft is small, and the keyway is formed on the cylindrical shaft, so the keyway Stress concentration occurs in the shaft, weakening the shaft.

(b) Fixing means using half-moon keys As shown in FIG. 4, a plurality of arc-shaped recesses are formed in the inner circumference of the boss, and half-moon keys are interposed between these recesses and the cylindrical shaft surface, The tip of a tightening port screwed onto the boss is pressed against the outer surface of the half-moon key, thereby fixing the boss to the cylindrical shaft. According to this means, the problem of stress concentration on the cylindrical shaft mentioned in section (a) can be solved, but there is another problem that this stress concentration occurs on the hub side and the tightening torque is also large.

(e) A common problem with these methods is that the more the tightening port is pressed, the larger the gap between the boss and other cylindrical shaft parts, and the cutter itself is subjected to distorted force, resulting in problems such as squareness and gutter. This resulted in the formation of a similar layer, which shortened the life of the cutter.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and solves the problems of the prior art by simple and rational means.When fixing a boss to a cylindrical shaft, pressure oil is applied between the contact surfaces of the two. The boss with the slitter cutter is slid to the predetermined mounting position by the diameter expanding action of the oil and the lubricating action of the pressure oil, and by releasing the pressure oil, the boss is applied to the cylinder axis with a uniform force. It is an object of the present invention to provide a method for fixing a plurality of bosses without causing stress concentration as in the conventional method.

[Structure of the invention]

The structure of the present invention that solves the problems of the prior art is such that when a plurality of annular bosses having a slitter cutter on one side outer periphery are fitted and fixed at predetermined positions on a long cylindrical shaft at appropriate intervals, A boss is inserted into the shaft from the tapered part formed at one end of the cylindrical shaft, and when the tip of the shaft hole formed in the boss reaches the maximum diameter of the tapered part of the cylindrical shaft, the pressurized oil supply provided in the boss is inserted. The pressure oil is forced into the hole between the contact surface of the boss and the cylindrical shaft through the pressure oil distribution groove formed on the inner peripheral surface of the pressure oil pot boss, and the diameter of the boss is expanded by the action of this pressure oil. The boss slides along the cylindrical shaft to a predetermined mounting position by the diameter expansion action and the lubrication action that separates the two by feeling a thin oil film between the contact surfaces, and at the predetermined mounting position, the pressure is applied. Cut off the oil supply, return the enlarged diameter end of the boss to the I-shape, fit and fix the boss in a predetermined position on the cylindrical shaft, and repeat the above steps one after another. The slitter cutter is fixed.

〔Example〕

An embodiment of the means of the present invention will be explained with reference to FIGS. 2a, b, and c. As is clear from the figure, a tapered surface j1m is formed at one end of the cylindrical shaft 11. Also, a ring-shaped boss 1 with a ring-shaped slitter cutter 12 attached to the outer periphery of one side.
A pressure oil distribution groove IS with a predetermined width is provided all around the inner peripheral surface of No. 3.
A pressure oil supply hole 14 is formed in the boss 13 and has a threaded structure that is perpendicular to the axial direction of the boss 13 and communicates with the pressure oil distribution groove 13m.

Further, the inner diameter of the boss 13 is slightly smaller than the diameter of the cylindrical shaft 11, but it is desirable to form it to a small diameter. Further, an oil supply pipe (not shown) of a hydraulic pump (not shown) is screwed and connected to the pressure oil supply hole 14 .

Next, the means for fixing the boss 13 to the cylindrical shaft 11 will be explained. First, as shown in FIG. 2a, the boss 13 is inserted into the cylindrical shaft 11 from the tapered surface 1m side, and the leading end of the boss 13 is brought into contact with the maximum diameter portion of the tapered surface 11m.

At this point, the hydraulic pump supplies pressure oil to the pressure oil supply hole 14.
It is press-fitted between the boss 13 and the cylindrical shaft 11 via the pressure oil distribution groove 13a.

Due to the action of this hydraulic pressure, the diameter of the boss 13 is expanded, albeit slightly, as shown in Figure 2. Due to the diameter expansion of the boss 13 and the lubrication effect that forms a thin oil film between the two contact surfaces and separates the two, the boss 13 is moved along the cylindrical shaft 11 to a predetermined position, as shown in FIG. Slide it to the mounting position. Then, when the hydraulic pressure from the hydraulic pump is released when the boss 13 is set at a predetermined position, the diameter expanding action of the boss 13 is canceled and the boss 13 is tightened to the cylindrical shaft 11, as shown in FIG. 2C. The attachment is fixed.

By repeating these operations one after another, a plurality of bosses 13 are fixed to the cylindrical shaft 11 at appropriate intervals, as shown in FIG. 1, thereby constructing a slitter cutter mechanism for cutting blanks.

When replacing the boss 13 due to damage to the slitter cutter 12 or adjusting the opening distance of each boss, it is necessary to Pressure oil is injected to expand the diameter of the boss 13, and then the IW
Either it is moved and removed from the cylindrical shaft 11, or its position is adjusted.

〔effect〕

According to the configuration of the present invention as described above, the following effects can be obtained.

(a) The boss with the slitter cutter and the cylindrical shaft can be fixed at a predetermined position on the cylindrical shaft by the diameter expansion action of the boss using hydraulic pressure, without machining a keyway structure as in conventional methods; It is particularly suitable for fixing a large number of bosses, such as the cylindrical shaft of a cutter that cuts a blank.

(b) The boss can be easily removed and replaced when the slitter cutter is damaged, and the position of the boss can be adjusted and moved, improving blank cutting efficiency.

(e) The conventional keyway structure can be omitted, so
There is no stress concentration on the cylinder shaft or boss, and the uniform diameter reduction of the boss after the release of the 1L pressure hydraulic pressure results in an even distribution of pressure stress generated between the cylinder shaft and the cylinder shaft, which maintains the roundness of the cutter. The accuracy of the cutter, perpendicularity, gutter, etc. is greatly improved, the life of the cutter is significantly extended, and the cut dimensions of the blank to be cut can be made more accurate.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the main parts of a general blank cutting device, Fig. 2 a, b, and C are flow explanatory diagrams of the method of the present invention, and Figs. 3 and 4 are parts showing conventional fixing means. This is a cutaway original image. DESCRIPTION OF SYMBOLS 11... Cylindrical shaft, 11 Tipper surface, 12... Slitter cuffer, 13... Boss, 13... Pressure oil distribution groove, 14... Pressure oil supply hole. Figure 3 Figure 4

Claims (1)

[Claims] (a) When fitting and fixing a plurality of annular bosses having a slitter cutter on the outer periphery of one side to predetermined positions of a long cylindrical shaft at appropriate intervals, (b) On the other hand, the boss is inserted into the tapered part formed at one end of the cylindrical shaft, and when the tip of the shaft hole formed in the boss reaches the maximum diameter of the tapered part of the cylindrical shaft, the pressure oil supply hole provided in the boss is inserted into the boss. (c) Pressure oil is press-fitted between the contact surface of the boss and the cylindrical shaft through a pressure oil distribution groove formed on the inner peripheral surface of the boss, and the diameter of the boss is expanded by the action of this pressure oil. (d) The boss is slid along the cylindrical shaft to a predetermined mounting position by the diameter expanding action and the lubricating action that separates the two by forming a thin oil film between the contact surfaces of the two, and (d) the predetermined mounting position. At this point, the supply of pressure oil is cut off, the expansion of the diameter of the boss is released, and the boss is fitted and fixed at a predetermined position on the cylindrical shaft. A method for fixing a slitter cutter for cutting a blank to a cylindrical shaft, characterized in that a boss having a plurality of slitter cutters is fixed to each boss.