JP2005230855A - Form-rolling tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a form-rolling tool capable of form-rolling a flange part of a larger diameter so that a more quantity of blank is allowed to plastically flow into one side in the tooth width direction of a form-rolled tooth. <P>SOLUTION: This form-rolling tool is gradually expanded to the tooth width of a biting part 8 when a form-rolling blank 10 is moved with the form-rolling toward a finishing part on the biting part, and in this way, the pushed-out blank is heaped up as the excessive thickness at the one side surface 2a side of the thread-rolled tooth 2 to form the flange part 11. That is, in the conventional form-rolling tool, since the excessive thickness is heaped up from both sides in the tooth width direction of the thread-rolled tooth and plastic-fluid amount of the blank is dispersed by this amount and the form-rolling of the flange part having large diameter is difficult, however, in the case of using this form-rolling tool 1, the plastic-fluid of this blank is concentrated into only the one-side surface 2a side of the thread-rolled tooth 2 and since the large amount of the excessive thickness can be heaped up by this amount, the flange part 11 having further larger diameter can be thread-rolled. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rolling tool, and more particularly to a rolling tool capable of rolling a larger-diameter brim portion by allowing more material to plastically flow on one side in the tooth width direction of the rolling teeth. .

  In general, a concrete mold that is the foundation of a building is formed by placing a face plate such as a plywood in accordance with the shape of the concrete mold to form a formwork, and then placing concrete in the formwork. . A so-called round separator is used for forming the mold.

  FIG. 6A is a schematic diagram showing a conventional round separator 110, and FIG. 6B is a partially enlarged view of the collar portion 111. FIG. As shown in FIGS. 6A and 6B, the round separator 110 is made of a metal material into a substantially round bar-like body, and a collar portion 111 and a male screw portion 112 are provided at both ends thereof. . As shown in FIG. 6B, the collar portion 111 is formed so as to protrude from the outer peripheral surface of the round separator 110 in a substantially flange shape.

  Forming the mold is performed as follows. First, both ends of the round separator 110 are inserted into the through holes formed in each face plate 113, and the round separator 110 is bridged between the opposing surfaces of the pair of face plates 113 as shown in FIG. Next, nuts N are screwed into the male threaded portions 112 at both ends of the round separator 110, and the face plates 113 are sandwiched and fixed between the nuts N and the flange portions 111. As a result, the pair of face plates 113 are erected in a state where a predetermined distance between the opposing faces is maintained, thereby forming a mold.

  Here, the protruding portion such as the collar portion 111 is formed by rolling using a rolling tool (Patent Document 1). A conventional rolling tool 200 used for this rolling process will be described. FIGS. 7A and 7B are cross-sectional views of a conventional rolling tool 200 cut along a plane perpendicular to the rolling direction. In addition, the imaginary line M of FIG. 7 has shown the outer peripheral surface of the to-be-rolled material.

  The rolling tool 200 is configured as a round die having an axis O, and the rolling teeth 201 (FIGS. 7A and 7B) in the biting portion are the rolling teeth 201 ( While having the same external shape as FIG.7 (c), the top height of the rolling tooth 201 is as it goes to the terminal end side (FIG.7 (c)) from the rolling direction start end side (FIG.7 (a)). It is comprised so that it may become high gradually.

Accordingly, the material to be rolled is sandwiched between the opposing surfaces of the pair of rolling tools 200 (rolling teeth 201), and the pair of rolling tools 200 are rotated to move the outer peripheral surface of the material to be rolled. The rolling teeth 201 are sequentially bited, and the material pushed away by this biting is plastically flowed in the axial direction of the rolled material. Thereby, the surplus is raised from both sides in the tooth width direction (left and right direction in FIG. 7) of the rolled teeth 201, and the collar portion 111 is formed by one surplus (surplus on the left side in FIG. 7).
JP-A-8-267165 (paragraphs [0004-0006], FIGS. 7-9, etc.)

  However, in the conventional rolling tool 200, when the rolled teeth 201 are bitten into the outer peripheral surface of the material to be rolled, the surplus is raised from both sides in the tooth width direction of the rolled teeth 201. There was a problem that the plastic flow amount of the raw material was dispersed in both raised portions, and the outer diameter of the collar portion 111 could not be made sufficiently large. As a result, it is difficult to ensure the strength of the collar portion 111, and there is a problem that the collar portion 111 is damaged by the fastening force of the nut N when the mold is formed.

  The present invention has been made in order to solve the above-mentioned problems, and it is possible to roll a larger diameter brim portion by causing more material to plastically flow on one side in the tooth width direction of the rolling teeth. It aims to provide a rolling tool that can be used.

  In order to achieve this object, the rolling tool according to claim 1 is provided with a single rolling tooth extending substantially in parallel with the rolling direction, and the rolling tooth is formed on the outer peripheral surface of the material to be rolled. The flanged brim is rolled on the outer peripheral surface of the material to be rolled by encroaching and raising the material that has been pushed away while plastically flowing, and the rolled tooth is formed of the rolled tooth. A horizontal chamfering surface portion formed substantially in parallel from one side surface in the tooth width direction, and an inclined chamfering surface formed by rising from the end portion of the horizontal chamfering surface portion toward the other side surface in the tooth width direction of the rolled tooth. A surface portion, and a biting portion that is formed between the inclined chamfering surface portion and the other side surface in the tooth width direction of the rolled tooth, and the inclined chamfering surface portion is formed with respect to the rolling direction. Formed with a predetermined lead angle, from the start side to the end side in the rolling direction. It, while the inclined incomplete toothed region is gradually close to the tooth width direction one side of the rolling tooth, tooth width of the biting portion is configured gradually to widen.

  The rolling tool according to claim 2 is the rolling tool according to claim 1, wherein the horizontal beveling surface portion is a peripheral surface of the rolled material when the collar portion is rolled on the rolled material. It is formed in the height which can contact | abut.

  The rolling tool according to claim 3 is the rolling tool according to claim 1 or 2, wherein an inclination angle at which the inclined beveling surface portion is inclined with respect to a biting direction into the rolled material is approximately 30 °. The range is approximately 60 ° or less.

  According to the rolling tool of claim 1, since the inclined beveling surface portion is formed with a predetermined lead angle with respect to the rolling direction, as it goes from the rolling direction start side to the end side, It is possible to gradually widen the tooth width of the biting portion while gradually bringing the inclined ridge face surface portion to one side surface in the tooth width direction of the rolled tooth. That is, when rolling the collar portion on the material to be rolled, the material can be more plastically flowed only in the direction toward the one side surface in the tooth width direction with the close movement of the inclined beveling surface portion. Therefore, as with conventional rolling tools, the amount of plastic flow of the material can be suppressed from spreading on both sides in the tooth width direction, and more surplus can be raised from only one side in the tooth width direction. There is an effect that a large-diameter brim portion can be rolled by the material to be rolled. As a result, by increasing the diameter of the collar portion, there is an effect that it is possible to ensure the strength and to prevent the collar portion from being damaged during the formation of the mold.

  According to the rolling tool of the second aspect, in addition to the effect produced by the rolling tool of the first aspect, the horizontal beveling surface portion is rolled when the collar portion is rolled on the material to be rolled. It is formed at a height that can contact the outer peripheral surface of the material. Therefore, if the biting part bites into the material to be rolled and the material is pushed away, the horizontal beveling surface part that is in contact with the outer peripheral surface of the material to be rolled guides the plastic flow of the material, and the rolling teeth Since the surplus meat can be reliably raised on one side surface in the tooth width direction, there is an effect that the collar portion having a larger diameter can be raised accordingly.

  According to the rolling tool according to claim 3, in addition to the effect exerted by the rolling tool according to claim 1 or 2, the inclination angle at which the inclined mountain-paved surface portion is inclined with respect to the biting direction of the material to be rolled is: Since it is about 30 ° or more, there is an effect that the raw material can be smoothly plastically flowed toward one side surface in the tooth width direction of the rolled teeth. That is, when the inclination angle is smaller than about 30 °, the inclined ridge face surface portion rises too rapidly with respect to the plastic flow direction of the material, so that the material can be pushed away smoothly toward one side in the tooth width direction of the rolling teeth. This makes it difficult to cause problems such as peeling of the material surface.

  On the other hand, since the inclination angle is about 60 ° or less, there is an effect that a pressing force for plastic flow toward one side in the tooth width direction of the rolled teeth can be appropriately applied to the material. . That is, when the inclination angle is larger than approximately 60 °, the inclined ridge face surface portion is excessively inclined with respect to the plastic flow direction of the material, and therefore plastic flows toward one side in the tooth width direction of the rolled teeth. The pressing force cannot be appropriately applied to the raw material, and a problem arises in that, as with a conventional rolling tool, surplus material rises from both sides of the rolled tooth.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a front view of a rolling tool 1 according to an embodiment of the present invention. In addition, in FIG. 1, only one rolling tool 1 fixed to a rolling board (not shown) is illustrated among a pair of rolling tools 1 which perform rolling to the to-be-rolled material 10 mentioned later. The illustration of the other rolling tool 1 that is reversely rotated with respect to the one rolling tool 1 is omitted.

  The rolling tool 1 is a tool for rolling the collar portion 11 on the outer peripheral surface of a cylindrical shaft-shaped material (rolled material 10). In the conventional rolling tool, since the surplus was raised from both sides of the rolling teeth 201, it was difficult to increase the outer diameter of the collar portion 111 (see FIGS. 6 and 7). The rolling tool 1 of the embodiment is configured such that the surplus thickness rises from only one side of the rolling teeth 2, so that the collar portion 11 having a larger diameter can be rolled (see FIG. 4).

  The rolling tool 1 has a predetermined plate thickness (thickness in the vertical direction in FIG. 1) from a metal material (JIS-SKD11 in this embodiment) such as alloy tool steel and high-speed tool steel suitable for rolling. It is formed in a disk shape, and on its outer peripheral side, a rolling tooth 2 for rolling the collar portion 11 on the outer peripheral surface of the material to be rolled 10 is provided.

  The rolling tool 1 is sequentially provided with a chamfered portion 3, a finishing portion 4 and a relief portion 5 in order from the start side to the end side in the rolling direction (clockwise in FIG. 1). The biting part 3 is a part for causing the rolling teeth 2 to bite against the outer peripheral surface of the material to be rolled 10, and the rolling teeth 2 in the biting part 3 are the rolling teeth in the finishing part 4 to be described later. 2 is formed concentrically.

  However, as will be described later, the rolling teeth 2 in the biting portion 3 are provided with a lead-clamping, and the rolling teeth 2 in the biting portion 3 move from the rolling direction start end toward the end. As shown in FIG. 1, the height from the axis O is gradually increased, and the tooth width is also gradually increased. The detailed configuration of the rolling teeth 2 in the biting part 3 will be described later.

  The finishing part 4 is a part for finishing the surplus raised on the outer peripheral surface of the rolled material 10 by the biting part 3 and forming the collar part 11. An escape portion 5 is provided at the end of the finish portion 4. The escape portion 5 is a portion for discharging the rolled material 10 finished by the finishing portion 4 and is formed with a predetermined drop amount.

  The material to be rolled 10 is sandwiched between facing surfaces of a pair of rolling tools 1 (rolling teeth 2), and the pair of rolling tools 1 are driven to rotate in directions opposite to each other, whereby the biting portion 3 is moved. The finish portion 4 and the escape portion 5 are rolled in order. As a result, the rolling teeth 2 are sequentially bited into the outer peripheral surface of the rolled material 10, and the material pushed away by the biting is plastically flowed, and the tooth width direction of the rolling teeth 2 (the direction perpendicular to the paper surface in FIG. 1). As a surplus from one side of the width), the collar 11 is formed by the surplus (see FIGS. 4 and 5).

  Next, with reference to FIG.2 and FIG.3, the rolling tooth 2 in the biting part 3 is demonstrated. 2 (a) to 2 (d) are partial sectional views of the biting portion 3 taken along lines IIa-IIa to IId-IId in FIG. 1, respectively, and the biting portion is a virtual plane perpendicular to the rolling direction. FIG.

  In addition, in FIG. 2, the external shape of the rolling tooth 2 before performing the wiping process with the grinding wheel G is illustrated using broken lines. 2A is a rolling direction start end position of the biting portion 3, and FIG. 2D is a rolling direction end position of the biting portion 3, which is a boundary position with the finishing portion 4. It is.

  FIG. 3 is a development view in which the outer peripheral surface of the rolling tool 1 (the upper end surface of the rolling teeth 2) is developed on a plane. For easy understanding, the sloped wiping surface portion 7 is hatched. It is shown. In the developed view shown in FIG. 3, the positions from the “A” line to the “D” line correspond to the positions from the IIa-IIa line in FIG. 1 to the IId-IId line in FIG. Accordingly, FIGS. 2A to 2D respectively correspond to the cross-sectional views of the biting portion 3 along the “A” line to the “D” line in FIG.

  Here, the rolling teeth 2 in the finishing portion 4 are, as shown in FIGS. 2D and 3, one side surface 2 a and multiple side surfaces 2 c constituting both sides in the tooth width direction (left and right direction in FIG. 2), An upper end surface 2b that connects the upper ends of the side surfaces 2a and 2c and rises and inclines from the one side surface 2a toward the multi-side surface 2c is provided.

  On the other hand, the rolling teeth 2 in the biting portion 3 have the same outer shape as the rolling teeth 2 in the finishing portion 4 and are configured to have the same height from the axis O. As shown in FIG. 2 and FIG. 3, lead-type chamfering using a grinding wheel G is applied to the top. In the present embodiment, the lead angle α in this lead-cuttering process is α = 0 ° 48 ′.

  As shown in FIG. 2 and FIG. 3, the rolled teeth 2 in the biting portion 3 are extended substantially parallel to the tooth width direction (left-right direction in FIG. 2) from the side surface 2 a by this lead-clamping with lead. And a slope wiping surface portion 7 that is inclined upward from the end (right end in FIG. 2) of the horizontal wiping surface portion 2a toward the other side surface 2c. Further, a biting portion 8 is formed between the inclined hill-paining surface portion 7 and the multi-side surface 2c.

  Further, the rolling teeth 2 in the biting portion 3 have an axial center O as they go from the rolling direction start end side (FIG. 2A, left side of FIG. 3) to the terminal end side (FIG. 2D, right side of FIG. 3). The height from the top to the top is gradually increased, and the inclined beveling surface portion 7 is gradually brought closer to the one side surface 2a (the left side in FIG. 2, the upper side in FIG. 3) at the lead angle α, thereby The tooth width (width in the horizontal direction in FIG. 2, width in the vertical direction in FIG. 3) is gradually widened.

  Next, with reference to FIG.4 and FIG.5, the process in which the collar part 11 is formed in the outer peripheral surface of the to-be-rolled raw material 10 with the rolling tool 1 is demonstrated. FIG. 4 is a partial cross-sectional view of the rolling teeth 2 and the rolled material 10, and shows how the rolled material 10 rolls sequentially from the biting portion 3 to the finishing portion 4 of the rolling tool 1. Show. Moreover, FIG. 5 is the elements on larger scale of the collar part 11 rolled with the rolling tool 1 of this invention.

  When rolling the collar portion 11 on the material to be rolled 10 with the rolling tool 1, first, the material to be rolled 10 is sandwiched between the facing surfaces of the pair of rolling tools 1 (rolled teeth 2). In this case, as shown in FIG. 4A, the upper end surface of the rolling teeth 2, that is, the horizontal wiping surface portion 6 is brought into contact with the outer peripheral surface of the rolled material 10.

  Next, the pair of rolling tools 1 are rotationally driven in opposite directions. Thereby, the material to be rolled 10 rolls on the biting part 3 toward the finishing part 4 and the escape part 5. In this case, as shown in FIG. 4B, the biting portion 8 is gradually bited into the outer peripheral surface of the rolled material 10, and the material pushed away by this biting is in the axial direction (FIG. 4B). Left and right) and is raised as a surplus from both sides of one side 2a and the other side 2b of the rolling tooth 2.

  When the rolled material 10 further rolls and moves on the biting portion 3 toward the finishing portion 4, as shown in FIG. 4 (c) to FIG. 4 (f), the biting bitten into the rolled material 10 The tooth width (width in the left-right direction in FIG. 4) of the portion 8 is gradually widened, whereby the displaced material is raised as a surplus on the side surface 2a side of the rolled tooth 2 and the collar portion 11 is formed (FIG. 5).

  In this case, as described above, the inclined ridge face surface 7 has the lead angle α (see FIG. 3), so that the tooth width of the biting portion 8 is increased with respect to the upper rolled material 10. This is performed by moving only the inclined hill-pasting surface portion 7 toward the one side surface 2a (left side in FIG. 4) while fixing the position of the other side surface 2c.

  Therefore, as shown in FIGS. 4 (c) to 4 (f), the rolling teeth 2 are formed by the movement of the inclined beveling surface portion 7 (that is, widening of the tooth width of the biting portion 8). Is extruded only in the direction of one side 2a (left side of FIG. 4) of the rolled tooth 2, while hardly flowing in the direction of the other side 2c (right side of FIG. 4). Therefore, as shown in FIGS. 4A to 4F, a large amount of surplus can be raised only on the side surface 2a side of the rolled tooth 2.

  In other words, in the conventional rolling tool, the surplus was raised from both sides in the width direction of the rolling teeth, so that the amount of plastic flow of the material was dispersed, and it was difficult to roll the large-diameter collar. Although there was (refer FIG.6 (b)), according to the rolling tool 1 of this invention, the plastic flow of a raw material is concentrated only on the one side 2a side of the rolling tooth 2, and a larger amount of surplus is raised. Therefore, the larger-diameter brim portion 11 can be rolled accordingly (see FIG. 5). As a result, it is possible to improve the strength of the flange portion 11 and to prevent the flange portion 11 from being damaged by the fastening force of the nut N when forming the formwork.

  Here, the inclination angle β (see FIG. 2) at which the inclined hill-paved surface portion 7 is inclined with respect to the biting direction (vertical direction in FIG. 4) into the rolled material 10 is approximately 30 ° or more and approximately 60 ° or less. In this embodiment, the inclination angle β is set to approximately 45 °.

  If the inclination angle β is made smaller than about 30 °, the inclined hill-wiping surface portion 7 rises too quickly at a steep angle with respect to the plastic flow direction of the material (the left-right direction in FIG. 4), so that the material smoothly plastically flows. It becomes impossible to peel off the surface of the material. On the other hand, by setting the inclination angle β to approximately 30 ° or more, the raw material can be smoothly plastically flowed, the deterioration of the yield due to peeling can be suppressed, and the processing force required for rolling can be reduced.

  In addition, when the inclination angle β is larger than approximately 60 °, the inclined ridge-wiping surface portion 7 is excessively inclined with respect to the plastic flow direction (the left-right direction in FIG. 4) of the material. The force of plastic flow toward 2a is weakened, and there is a problem in that the surplus material rises from both sides (sides 2a and 2c) of the rolling tooth 2 as in the conventional rolling tool. On the other hand, by setting the inclination angle to approximately 60 ° or less, a force for plastic flow toward the one side surface 2a of the rolling teeth 2 can be appropriately applied to the material.

  As shown in FIGS. 4 (a) to (f), the horizontal pile-off surface portion 6 can come into contact with the outer peripheral surface of the rolled material 10 in the process of rolling the collar portion 11 onto the rolled material 10. It is formed at a certain height. Therefore, when the biting portion 8 bites into the rolled material 10 and the material is pushed away, the plastic flow of the material can be guided to the predetermined direction (left side in FIG. 4) by the horizontal pile-off surface portion 6. Therefore, it is possible to roll up the larger-diameter brim portion 11 by reliably raising the surplus on the side surface 2a side of the rolled tooth 2.

  The present invention has been described based on the embodiments. However, the present invention is not limited to the above embodiments, and various modifications can be easily made without departing from the spirit of the present invention. It can be guessed.

  For example, although the present Example demonstrated the case where the rolling tool 1 was comprised as a round die, it is not necessarily restricted to this, For example, the rolling tool 1 is comprised as a flat die or a rotary type rolling die. Of course it is possible.

It is a front view of the rolling tool 1 in one Example of this invention. (A) to (d) is a partial cross-sectional view of the biting portion taken along lines IIa-IIa to IId-IId in FIG. 1, respectively. It is the expanded view which expanded and showed the outer peripheral surface of the rolling tool in the plane. It is a figure which shows the rolling process of the to-be-rolled material with a rolling tool. It is the elements on larger scale of the collar part rolled by the rolling tool of this invention. (A) is a schematic diagram which shows the conventional round separator, (b) is the elements on larger scale of a collar part. It is sectional drawing which cut | disconnected the conventional rolling tool by the surface perpendicular | vertical to the rolling direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rolling tool 2 Rolling tooth 2a One side surface 2c Other side surface 6 Horizontal chamfering surface part 7 Inclined chamfering surface part 8 Biting part 10 Rolled material 11 Brim part α Lead angle β Inclined angle of inclined chamfering surface

Claims (3)

By providing a single rolling tooth extending substantially parallel to the rolling direction, biting the rolled tooth into the outer peripheral surface of the material to be rolled, and raising the displaced material while plastic flowing, In a rolling tool that rolls a flange portion of a substantially flange shape on the outer peripheral surface of a rolled material,
The rolled teeth are
A horizontal wiping surface portion formed substantially in parallel from one side surface in the width direction of the rolled tooth;
A sloped mountain-carrying surface part formed by rising and inclining from the end of the horizontal mountain-carrying surface part toward the other side surface in the tooth width direction of the rolled tooth;
A biting portion that is formed between the inclined hill-paved surface portion and the other side surface in the tooth width direction of the rolled tooth,
The inclined hill facet portion is formed with a predetermined lead angle with respect to the rolling direction,
The inclined chamfering surface portion is gradually approached to one side surface in the tooth width direction of the rolling tooth as it goes from the starting end side to the end side in the rolling direction, and the tooth width of the biting portion is gradually widened. Rolling tool characterized by that.   The horizontal pile-up surface portion is formed at a height that allows contact with the outer peripheral surface of the rolled material when the collar portion is rolled on the rolled material. The rolling tool described.   The inclination angle at which the inclined hill-paved surface portion is inclined with respect to the biting direction into the rolled material is in a range of approximately 30 ° or more and approximately 60 ° or less. 2. The rolling tool according to 2.

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