JPH07256597A - Sleeve type cutter roll and manufacture thereof - Google Patents

Abstract

PURPOSE:To prevent the generation of deflection and crack on the axis of the roll sleeve member of a sleeve type cutter roll. CONSTITUTION:A roll sleeve member 1 made of the high abrasionproof material and a shaft which is made of the high toughness material and penetrates through the inside diameter of the roll sleeve member 1 are fixed through the tighetening fitting, and plural pairs of engagement recessed parts 1a consisting of an engagement recessed part 1a installed on the roll sleeve 1 and an engagement recessed part 1a which is working-formed on the shaft, having the recessed part 1a as standard are installed, and a sleeve type cutter roll is formed by inserting an engagement member into each pair.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a sheet to be cut between an anvil roll having a cylindrical outer diameter, which is a mating roll, and a cutting blade formed on the outer circumference of the anvil roll in a continuous manner. The present invention relates to a cutter roll that is cut and cut by pressing, and more particularly to a sleeve-type cutter roll that is assembled by concentrically fitting a roll sleeve member made of a highly wear-resistant material and a shaft made of a highly tough material.

[0002]

2. Description of the Related Art Conventionally, a cutter roll is an integrated product made of a material such as alloy tool steel, high speed tool steel, cemented carbide, or a roll sleeve member made of these alloys,
Assembled rolls (hereinafter referred to as sleeve type cutter rolls) in which a shaft member made of a high toughness material such as machine structural steel is fixed and integrated with a tightening allowance such as shrink fit are used. Smaller, the latter is used for relatively large cutter rolls. Further, recently, in order to prevent the cut product or the like from being bitten accidentally, the cut product or the like is reliably separated from the surface of the cutter roll. A cutter roll has appeared, which is provided with holes and ejects compressed air through the air holes from a slide valve provided in contact with the body end surface or the like. Further, the demand for improvement in cutting performance is not unstoppable. On the other hand, in the case of high speed tool steel and the like, high alloying is possible by adopting the powder metallurgy method, and wear resistance is being greatly improved. However, along with this, the toughness is gradually decreasing.

[0003]

When the above-mentioned one-piece cutter roll is applied to a large-sized product, there is a disadvantage that it becomes very expensive, especially in a cemented carbide or a high alloy made by powder metallurgy, and it tends to be broken or broken. It was On the other hand, the sleeve type cutter roll solves the inconvenience of the above-mentioned integrated type roll, but when the roll sleeve member is made of a high wear resistant material, the toughness is relatively lowered, and the roll sleeve member is Cracks are likely to occur due to hoop stress or stress during use, and if the tightening margin for the shaft is reduced in order to prevent this crack, there will be a gap in the circumferential direction due to the cutting torque between the shaft and the shaft. There was a problem that occurred. SUMMARY OF THE INVENTION It is an object of the present invention to provide a sleeve-type cutter roll that prevents cracks and slippage and facilitates the formation of air holes even if the roll sleeve is a material having low toughness, and a method for manufacturing the same. To do.

[0004]

SUMMARY OF THE INVENTION The present invention secures a roll sleeve member on a shaft by a relatively small interference, and therefore a fit with a small hoop stress, and
The two members are locked by a plurality of locking members to prevent the shift, and the plurality of locking members evenly resist the shift action to prevent the occurrence of excessive stress and prevent the sleeve roll from moving. It prevents cracking.

That is, the present invention relates to a sleeve type cutter roll comprising a roll sleeve member having cutting blades arranged in a continuous peak on a cylindrical outer peripheral surface, and a shaft member penetrating the concentric inner diameter of the roll sleeve member, The both members are fitted with each other with a tightening allowance, and a plurality of sets of locking recesses formed in the roll sleeve member and locking recesses formed in the shaft are opposed to each other via the surfaces of the fitting. The sleeve-shaped cutter roll is characterized in that a locking member is inserted into the locking recess formed by these locking recesses jointly, and a cutting blade continuous in a continuous manner on the cylindrical outer peripheral surface. In a method for manufacturing a sleeve type cutter roll comprising a roll sleeve member and a shaft member that penetrates the concentric inner diameter of the roll sleeve member, the both members are fitted with a tightening margin. After that, by taking a plurality of locking recesses formed in advance as facing the fitting surface of the roll sleeve member, the locking recesses are processed in the shaft member respectively, and a plurality of sets of locking recesses of both members are processed. Is a method for manufacturing a sleeve-type cutter roll, wherein engaging members are respectively fitted in engaging recesses formed together.

[0006]

First, the manufacturing method of the present application will be described. In the manufacturing method of the present application, after the roll sleeve member and the shaft member are fitted with each other with an interference, the locking recess formed in the roll sleeve member as a model is used to form the locking recess on the shaft member. The locking member is fitted into a plurality of sets of locking recesses formed together by the stop recesses. When a large number of locking recesses are formed jointly, the mutual position error between both locking recesses of each set is minimized due to machining one of the two as a model, and thus each relationship is minimized. The stop member cooperates evenly to resist the action of causing a shift, thereby suppressing the stress concentration on the roll sleeve member having low toughness and preventing the occurrence of cracks.

Drilling is the most desirable and general method as a concrete method of processing the locking recess on the shaft by taking the locking recess previously formed in the roll sleeve member as an example. And
In this case, the locking member is preferably a pin having a solid round cross section or a spring pin having a C-shaped cross section. Further, the processing of the locking recess of the roll sleeve member in the present invention as an example means that the locking recess is used as a guide surface for processing. Electric discharge machining as a machining method as an example of this,
It also includes electrolytic processing. Further, these processing methods are useful for processing locking recesses having a shape other than a circular cross section. These cross-sectional shapes should be determined in view of minimizing the stress concentration of the roll sleeve and the difficulty of processing the locking recess and the locking member. Further, in the method of the present invention, the locking member whose axial direction is perpendicular to the axis of the assembling roll as in the first embodiment described later is advantageous in terms of processing method and function. In the case where the shaft center is parallel to the shaft center of the assembly roll, the locking recess is generally a small diameter deep hole shape, which tends to increase the difficulty of processing, and it is not possible to completely prevent axial misalignment. There is also).

The sleeve type die-cut roll of the present invention is
The structure is defined so as to be particularly suitable for adopting the manufacturing method described above, and since the plurality of sets of locking members evenly transmit the torque and prevent the deviation, the deviation is surely prevented. This reduces the interference of the interference fit, and hence the hoop stress due to the interference fit, to prevent cracking. Of the air holes for jetting compressed air, the part that runs parallel to the roll axis in particular reduces the effective thickness of the roll sleeve member, increases hoop stress, and causes stress concentration. With a sleeve type die-cut roll that adheres and integrates only by itself, it will promote the occurrence of cracks, so it could not be substantially provided on the high wear-resistant sleeve cutter roll.
The present invention can be relatively easily implemented by reducing the interference.

[0009]

1 is a half sectional view showing the structure of a sleeve type die-cut roll according to an embodiment of the present invention, and FIG. 2 is a sectional view perpendicular to its axis. The roll sleeve member 1 having air holes 5 is made of a high alloy high speed tool steel obtained by powder metallurgy and rough-processed in an annealed state, and then subjected to quenching and tempering heat treatment and finish processing. The shaft member 2 penetrating in a circular shape is fitted and integrated with a predetermined tightening margin (relatively small). The roll sleeve member 1 is provided with four holes 1 which are preliminarily provided recesses on the roll sleeve side.
As an example of a, the shaft member 2 is formed with the shaft member side locking recesses 2a by a drill having the same diameter. The locking recesses 2a on the shaft member side are correctly formed concentrically with the locking recesses 1a on the roll sleeve member side by any model action in any of the locking recesses. The spring pins 3, which are locking members, are inserted into the locking recesses formed jointly as described above. With the above-described configuration, the plurality of pins 3 evenly resist the displacement action, so that only a specific sleeve-side locking concave portion does not act to concentrate stress on the corresponding portion, and the locking concave portions are not affected. Can be downsized. In order to prevent the pin 3 from slipping out due to vibration during rotation of the roll, a female screw is machined at the inlet of the pin 3 of the roll sleeve member 1, and a hexagonal and a set screw 4 with a hole are attached to the female screw for each pin. The two are screwed together like a double nut.

In this embodiment, since the shaft member 2 is provided with the stepped portion 2b so as to easily and surely position both members in the axial direction, and the engaging recess is formed as a round hole and is hung vertically on the shaft. Further, it has features that the processing of the locking member is facilitated, and that the locking member is in the vertical direction, so that the axial displacement is surely prevented. In the sleeve type cutter roll of the present invention, it is conceivable that a minute gap is generated between the locking recess and the locking member. In this case, a high-hardness adhesive such as an epoxy adhesive may be used together with the locking part. If this is the case, the load on each locking member can be more evenly equalized, and the purpose of preventing disengagement can also be achieved. The cutter roll of the above-mentioned embodiment is in use without any abnormality at present, and is completely prevented from cracking and slipping, and sufficiently exhibits high wear resistance of the high alloyed high speed tool steel.

In FIG. 3, a pin 3'which is a locking member is arranged parallel to the roll axis. Although this type has some difficulties in processing the locking recesses as described above, on the other hand, it does not reduce the effective cross-sectional area of the roll sleeve member, and it does not affect the arrangement of the cutting blades. It has a feature that a member can be provided.

[0012]

As described above, according to the sleeve type cutter roll of the present invention, since a plurality of locking members are inserted between both members, the slip can be completely prevented even with a small tightening margin, and Since the locking member evenly resists the displacement force, stress concentration is less likely to occur on the roll sleeve member having low toughness, and therefore, the crack of the roll sleeve member is generated in combination with the effect of the small interference. And facilitates the provision of air holes.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a sectional view taken along a line perpendicular to the axis of FIG.

FIG. 3 is a sectional view of another embodiment of the present invention.

[Explanation of symbols]

1 Roll Sleeve Member, 1a Roll Sleeve Member Side Locking Recess, 2 Shaft, 2a Shaft Side Locking Recess, 3 Pin (Locking Member), 4 Set Screw, 5 Air Hole

Claims (2)

[Claims] 1. A sleeve type cutter roll comprising a roll sleeve member having a cutting edge continuous in a multimodal shape on a cylindrical outer peripheral surface, and a shaft member penetrating the concentric inner diameter of the roll sleeve member, wherein both members are provided. Are fitted with a tightening allowance, and a plurality of sets of locking recesses formed in the roll sleeve member and locking recesses formed in the shaft are opposed to each other through the surfaces of the fitting, and both of these A sleeve-type cutter roll, characterized in that a locking member is inserted into each locking recess formed together with the locking recess. 2. A method for manufacturing a sleeve-type cutter roll, comprising: a roll sleeve member having cutting blades extending in a continuous peak on a cylindrical outer peripheral surface; and a shaft member penetrating the concentric inner diameter of the roll sleeve member, After fitting the both members with a tightening allowance, the locking recesses are respectively processed in the shaft member by taking as an example a plurality of locking recesses formed in advance facing the fitting surface of the roll sleeve member, A method of manufacturing a sleeve-type cutter roll, characterized in that the engaging members are fitted into the engaging recesses formed by the plural engaging recesses of both members in common.