JP2005262316A - Method and apparatus of press forming - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To exactly form a complicated or largely deformed portion on a material to be formed. <P>SOLUTION: In a press forming apparatus, respective rollers of a plurality of first group rollers and respective rollers of a plurality of second group rollers are alternately arranged in the longitudinal direction of the material to be formed. In the first stage, the respective rollers are turned at the ordinary rotational speed corresponding to the speed of the material to be formed moving in the longitudinal direction, and the forming portions of the respective rollers form deformed portions on the material to be formed. In the second stage, with respect to the respective rollers, the positions of the deformed portions of the material to be formed are detected, wherein the deformed portions are formed by the roller located on the just upstream side in the same group as that roller, and then, the modified rotational speed of the respective rollers necessary for matching the forming portions of the respective rollers with the deformed portions of the material to be formed is calculated based on the detected positional information, and the respective rollers are turned at the modified rotational speed without bringing the forming portions of the rollers into contact with the deformed portion formed by the roller located on just upstream side in the different group. In the third stage, the deformed portions of the material to be formed are furthermore deformed by the forming portions of the respective rollers by turning the respective rollers at the ordinary rotational speed. The second stage and the third stage are repeated. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a press working method and a press working apparatus, and more particularly, to a press working method and a press working apparatus that press a same portion of a member to be molded a plurality of times with a roller to cause a complicated shape or a large deformation to the material to be molded.

  Generally, in order to give a complicated shape or a large deformation to a material to be molded, it is necessary to press the same portion of the material to be molded a plurality of times with a roller. Therefore, conventionally, a method of reciprocating a material to be molded between a pair of rollers has been proposed. However, this method has a problem that the reciprocating motion cannot increase the machining speed and cannot improve the productivity. Therefore, in order to solve such a problem, the molding material is moved in one direction, a part of the molding material is molded by a pair of upstream rollers, and then the same part is molded by a pair of downstream rollers. Thus, a method of applying a complicated shape or a large deformation to the material to be molded has been proposed (for example, see Patent Document 1).

JP-A-2-150333

  This method has an advantage that productivity is improved by molding a material to be molded with a plurality of pairs of rollers. However, since the material to be formed is irregularly extended or contracted in the longitudinal direction of the material to be formed by each roller, for example, as shown in FIG. 4, the forming portions 22 and 25 of the upstream roller 2 are formed. The deformed portion 41 of the molding material 4 formed in the above is slower in movement than the molding portions 32 and 35 of the downstream roller 3, and the deformed portion 41 of the molding material 4 and the molding portions 32 and 35 of the downstream roller 3 are aligned. There was a problem that it was not possible to make it precise and that it could not be processed accurately.

  In view of the above problems, an object of the present invention is to provide a pressing method for accurately forming a complicated shape or a large deformed portion on a material to be molded.

  According to the press working method according to claim 1 of the present invention, a plurality of rollers in the first group and a plurality of rollers in the second group are provided, and each roller of the plurality of rollers in the first group and a plurality of rollers in the second group are provided. A plurality of rollers in the first group and a plurality of rollers in the second group at the same speed as the molding material moving in the longitudinal direction using a press working apparatus in which the rollers of the rollers are alternately arranged in the longitudinal direction of the molding material A first stage in which a deformed portion is formed on the material to be molded by forming portions of the plurality of rollers of the first group and forming portions of the plurality of rollers of the second group by rotating the rollers of the first group, and a plurality of members of the first group For each of the plurality of rollers and the plurality of rollers of the second group, the position of the deformed portion of the molding material formed by the immediately upstream roller of the same group as the roller is detected, and based on the position information of the detected deformed portion, Molded part of each roller and deformed part of molding material Calculate each correction rotation speed of each roller necessary for alignment, and rotate each roller at the correction rotation speed without bringing each roller into contact with a deformed portion formed by a different roller in the group immediately upstream of each roller. A second step of rotating the plurality of rollers of the first group and the plurality of rollers of the second group at the same speed as the molding material moving in the longitudinal direction, By providing a third stage that further deforms the deformed portion of the material to be deformed at the molding portion of the plurality of rollers of the second group, and a fourth stage that repeats the second stage and the third stage. The deformed portions formed by the rollers and the deformed portions formed by the plurality of rollers of the second group are alternately formed on the material to be molded. In this way, by adjusting the rotation of each roller so that the molded portion of each roller and the deformed portion of the molding material are aligned before molding by each roller, a complicated shape or a large deformed portion is formed on the molding material. It can be formed accurately.

  According to the press working method according to claim 2, the surface of the roller does not come into contact with the molding material even when facing the molding material and the molding portion that deforms the molding material when facing the molding material. It consists of a non-molded part. Thus, switching between the mode in which the roller is idle fed without contacting the material to be molded in the second stage of pressing and the mode in which the material is deformed by the roller in the third stage is performed in the second stage. There is an advantage that it is realized simply by rotating the roller so as to face the non-molded portion and the molded portion of the roller in the third stage.

  According to the press working apparatus according to claim 3, the deformation can be further applied to at least one preforming roller that forms the deformed portion on the material to be molded, and the deformed portion of the material to be formed formed by the preforming roller. A finish forming roller having a forming portion and a non-forming portion having a gap between the material to be formed, a most downstream pre-forming roller of at least one pre-forming roller, and a finishing forming roller; And a feed roller having a recess that engages with the deformed portion of the workpiece and aligns with the molded portion of the finish forming roller. In this way, the deformed portion of the molding material formed by the preforming roller engages with the concave portion of the feed roller and reliably aligns with the molding portion of the finish molding roller. The part can be formed accurately.

  According to the press working apparatus of the fourth aspect, the feed roller is offset and positioned with respect to the preforming roller and the finish molding roller so that the material to be molded is curved on the feed roller. As described above, when the material to be molded is curved on the feed roller, the deformed portion of the material to be molded is surely engaged with the recess of the feed roller, so that the deformed portion is formed on the material to be molded more accurately. be able to.

  According to the press working apparatus according to claim 5, at least one of the molding part that forms the deformed part in the molding material and the non-molding part that has a gap between the molding material. A preforming roller, and a finish forming roller having a forming portion that can further deform the deformed portion of the molding material formed by the preforming roller. In this way, in the preforming roller, only the molding part comes into contact with the molding material, so that the molding material does not expand or contract in the longitudinal direction, so that the deformed part of the molding material is reliably aligned with the molding part of each roller. Thus, a complicated shape or a large deformed portion can be accurately formed on the material to be molded.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, a first embodiment of the present invention will be described. First, a schematic configuration of the press working apparatus 1 of the present invention will be described. FIG. 1 is a diagram showing a first step of the roller machining method of the present invention. As shown in FIG. 1, the press working apparatus 1 used in the press working method of the present invention includes a first group of rollers 2 for press-molding a first region 5 of a molding material 4, and a first of the molding material 4. The second region 6 includes a plurality of rollers 3 in a second group for press-molding. FIG. 1 shows only one of the plurality of rollers 2 of the first group and the plurality of rollers 3 of the second group. The rollers of the plurality of rollers 3 in the second group are alternately arranged in the longitudinal direction of the molding material 4.

  Next, the rollers 2 and 3 will be described. The roller 2 is mainly composed of a convex roller portion 21 and a concave roller portion 24 that face each other. The convex roller section 21 is composed of a convex molding section 22, a non-molding section 23, and a rotating shaft (not shown), and the concave roller section 24 is a concave molding section 25, a non-molding section 26, and a rotating shaft (not shown). ). The rotating shafts of the roller portions 21 and 24 are each connected to a drive source (not shown) such as a motor.

  With this configuration, when the roller 2 rotates, when the convex molding portion 22 and the concave molding portion 25 of the roller 2 face the molding material 4, the roller 2 deforms the molding material 4, and the roller 2 When the non-molding part 23 and the non-molding part 26 face the molding material 4, the roller 2 does not contact the molding material 4 and performs so-called idle feeding. Thus, since it is the structure which can carry out an idling, the rotation speed of the rotating shaft of the roller 2 can be adjusted in preparation for the shaping | molding of the next to-be-shaped material 4 at the time of this idling.

  Further, a detector (not shown) for detecting the position of the deformed portion 42 of the molding material 4 after being deformed by the roller 2 is disposed between the roller 2 and the roller 3. The detector may be a non-contact type such as a laser interferometer or a contact type such as a magnet scale. Thereby, after deform | transforming the to-be-molded material 4 with the roller 2, the position of this deformation | transformation part 42 can be detected, and the molding parts 22 and 25 of the roller 2 can be matched with the deformation | transformation part 42 of the to-be-molded material 4.

  That is, each detector is connected to the respective rotation shafts of the roller portions 21 and 24 of the roller 2 via a computer (not shown). As a result, the position information detected by each detector is sent to the computer, and based on this position information, the convex shaped portion 22 and concave shaped portion 25 of the roller 2 and the deformed portion 42 of the molding material 4 are aligned. The computer can send a command signal to rotate the rotation shafts of the roller portions 21 and 24 of the roller 2 at the calculated corrected rotation speed. Since the roller 3 has the same configuration as the roller 2, the description of the roller 3 is omitted.

  Next, the operation of the roller machining method of the present invention will be described. Here, the description will be given by taking the roller 2 as an example, and the description of the roller 3 that is operated in the same manner is omitted. In the state where the rollers of the plurality of rollers 2 in the first group and the rollers of the plurality of rollers 3 in the second group are alternately arranged in the longitudinal direction of the molding material, the linear strip-shaped molding material 4 is arranged. Has been. First, in the first stage, as shown in FIG. 1, in the roller 2, the roller 2 is rotated at a rotational speed (usually referred to as a normal rotational speed) equal to the moving speed of the molding material 4 to be transformed into the molding material 4. A portion 42 is formed. At the same time, in the roller 3, the deformed portion 43 is formed in the molding material 4 by rotating the roller 3 at a rotational speed (also referred to as a normal rotational speed) equal to the moving speed of the molding material 4.

  Next, in the second stage, as shown in FIG. 2 showing the first group of rollers 2 and the second group of rollers 3, for each roller 2, a deformed portion 42 applied by the immediately upstream roller 2 of the same group. When the deformation is further applied, preparation is made for adjusting the rotation of the roller 2 so that the molded portions 22 and 25 of the roller 2 and the deformed portion 42 of the molding material 4 are aligned. In detail, each roller 2 positions the position of the deformed portion 42 formed by the immediately upstream roller 2 of the same group while feeding the deformed portion 43 formed by the different group of rollers 3 immediately upstream. The correction rotational speed of each roller 2 is calculated on the basis of the detected position information detected by the detector, and each of the rollers 2 is rotated at the correction rotational speed so that the molding portions 22 and 25 of the roller 2 and the molding material 4 The deformed portion 42 is aligned. For example, if the deformed portion 42 of the molding material 4 arrives early if the roller 2 is rotated at the normal rotation speed as it is, the corrected rotation speed of the roller 2 is faster than the normal rotation speed, If the deformed portion 42 of the molding material 4 arrives late if the roller 2 is rotated at the normal rotation speed, the corrected rotation speed of the roller 2 is slower than the normal rotation speed.

  Next, in the third stage, as shown in FIG. 3, in the roller 2, the roller 2 is rotated at a normal rotation speed to further deform the deformed portion 42 of the molding material 4, and at the same time, in the roller 3, The roller 3 is rotated at the rotational speed to further deform the deformed portion 43 of the molding material 4.

  Next, in the fourth stage, the second stage and the third stage are repeated, and the deformed portions 42 and the deformed portions 43 can be alternately formed on the molding material 4. Thereafter, a desired product can be obtained by cutting the molding material 4 in the transverse direction, for example, in a cutting step.

  As described above, according to the present invention, when the same deformed portion of the material to be molded is repeatedly formed, in order to align the formed portion of each roller and the deformed portion of the material to be formed in advance for each forming, Since the rotation is adjusted, there is an advantage that a complicated shape or a large deformed portion can be accurately formed on the molding material.

  In the above description, the roller 2 and the roller 3 have the same configuration. However, the roller 2 and the roller 3 may have different configurations, and two types of deformed portions may be formed on the material to be molded.

  Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 4 shows a press working apparatus 100 according to the second embodiment of the present invention. The press working apparatus 100 of the present embodiment is generally composed of a pre-forming roller 101, a feed roller 111, and a finish forming roller 121 from upstream.

  The preforming roller 101 includes a concave roller portion 102 and a convex roller portion 103, and these roller portions 102 and 103 rotate synchronously to form a deformed portion 41 first on the molding material 4. .

  The finish forming roller 121 includes a concave roller portion 122 and a convex roller portion 123. The concave roller portion 122 includes a concave molding portion 124 that forms the deformed portion 41 in the molding material 4 and a non-molding portion 125 that has a gap between the molding material 4. Similarly, the convex roller portion 123 includes a convex molding portion 126 that forms the deformed portion 41 on the molding material 4 and a non-molding portion 127 that has a gap between the molding material 4. These roller portions 122 and 123 rotate synchronously and further deform the deformed portion 41 of the molding material 4 already formed by the preforming roller 101.

  The feed roller 111 is arranged between the finish forming rollers 121 so that the finish forming roller 121 can accurately form the deformed portion 41 on the material 4 to be formed. The feed roller 111 has a recess 112 that can engage with the deformed portion 41 of the molding material 4. Further, the rotation of the feed roller 111 and the rotation of the finish forming roller 121 are adjusted by a mechanism (not shown) so that the recess 112 is aligned with the forming portion 126 of the convex roller portion 123 of the finish forming roller 121. Therefore, when the deformed portion 41 of the molding material 4 is engaged with the concave portion 112 of the feed roller 111, it is guaranteed that the deformed portion 41 is aligned with the molded portion 126 of the convex roller portion 123 of the finish molding roller 121.

  Further, the feed roller 111 is positioned so as to be biased with respect to the preforming roller 101 and the finish forming roller 121 so that the molding material 4 is curved on the feed roller 111. Thereby, the to-be-molded material 4 is sent in the state pressed in the roller surface in the feed roller 111. FIG. As described above, when the molding material 4 is curved on the feed roller 111, the deformed portion 41 of the molding material 4 is reliably engaged with the concave portion 112 of the feeding roller 111. The deformed portion 41 can be formed in the shape 4.

  Further, as shown in FIG. 4, a guide portion for guiding the workpiece 4 to the feed roller 111 side so as to ensure that the deformed portion 41 of the workpiece 4 is engaged with the recess 112 of the feed roller 111. 131 may be provided outside the feed roller 111. Further, a guide portion 132 for guiding the material to be molded 4 to the finish forming roller 121 side can be provided outside the convex roller portion 123 of the finish forming roller 121.

  Note that the number of preforming rollers 101 is one in the present embodiment, but may be two or more in other embodiments.

  Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 5 shows a press working apparatus 200 according to the second embodiment of the present invention. The press working apparatus 200 according to the present embodiment includes a first preforming roller 201, a second preforming roller 211, and a finish forming roller 221 from the upstream.

  The first preforming roller 201 includes a concave roller portion 202 and a convex roller portion 203. The concave roller portion 202 includes a molded portion 204 that forms the deformed portion 41 on the molding material 4 and a non-molded portion 205 that has a gap between the molding material 4. On the other hand, the convex roller portion 203 has a molding portion 206 that forms the deformed portion 41 on the molding material 4 and a non-molding portion 207 that has a gap between the molding material 4. These roller portions 202 and 203 rotate synchronously to form a deformed portion 41 of the molding material 4.

  Further, the second preforming roller 211 is substantially the same as the first preforming roller 201, and the reference numerals are also given in the same manner. The roller portions 212 and 213 of the second preforming roller 211 rotate in synchronization with each other and further deform the deformed portion 41 of the molding material 4.

  The finish forming roller 221 includes a concave roller portion 222 having a molding portion 224 that further deforms the deformed portion 41 of the molding material 4 and a convex roller having a molding portion 225 that further deforms the deforming portion 41 of the molding material 4. Part 223. The roller portions 222 and 223 rotate synchronously and further deform the deformed portion 41 of the molding material 4 formed by the preforming rollers 201 and 211.

  As described above, in the first preforming roller 201, only the molded portions 204 and 206 are in contact with the molding material 4, and in the two preforming rollers 211, only the molding portions 214 and 216 are in contact with the molding material 4. The molding material 4 does not expand and contract in the longitudinal direction. Therefore, after the deformed portion 41 of the molding material 4 is formed by the first preforming roller 201, the deformed portion 41 is surely aligned with the molding portions 214 and 216 of the two preforming rollers 211, and further, the finishing molding roller 221 performs molding. Securely aligned with portions 224, 225. Therefore, a complicated shape or a large deformed portion 41 can be accurately formed on the molding material 4.

  Note that the number of the pre-forming rollers 201 and 211 is two in this embodiment, but may be three or more in other embodiments.

It is a figure which shows the 1st step of the press work method of this invention. It is a figure which shows the 2nd step of the press work method of this invention. It is a figure which shows the 3rd step of the press work method of this invention. It is a figure which shows the press work apparatus of the 2nd Example of this invention. It is a figure which shows the press work apparatus of the 3rd Example of this invention. It is a figure which shows the conventional press work method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Press processing apparatus 2 1st group roller 3 2nd group roller 4 Molding material 22 Molding part of 1st group roller 25 Molding part of 1st group roller 42 Deformation part of molding material 43 Deformation part

Claims (5)

A plurality of rollers in the first group and a plurality of rollers in the second group, and the rollers in the plurality of rollers in the first group and the rollers in the plurality of rollers in the second group are arranged in the longitudinal direction of the material to be molded. Using press processing devices arranged alternately,
By rotating the plurality of rollers in the first group and the plurality of rollers in the second group at the same speed as the molding material moving in the longitudinal direction, the molded portions of the plurality of rollers in the first group and the second A first stage of forming a deformed portion on the material to be molded by forming portions of a plurality of rollers of the group;
For each of the plurality of rollers of the first group and the plurality of rollers of the second group, the position of the deformed portion of the molding material formed by a roller immediately upstream of the same group as the roller is detected, and the detected deformation Based on the position information of the part, the correction rotational speed of each roller necessary for aligning the molded part of each roller and the deformed part of the molding material is calculated, and the group immediately upstream of each roller. A second stage in which the rollers are rotated at the corrected rotational speed without bringing the rollers into contact with deformed portions formed by different rollers;
By rotating the plurality of rollers of the first group and the plurality of rollers of the second group at the same speed as the material to be molded that moves in the longitudinal direction, the molding portions of the plurality of rollers of the first group and the second group are rotated. A third stage of further deforming the deformed portion of the material to be molded at the molded portions of the plurality of rollers of the group;
A deformed portion formed by the plurality of rollers of the first group and a deformed portion formed by the plurality of rollers of the second group by including the second step and a fourth step of repeating the third step. Are alternately formed on the material to be molded.   The surface of the roller is composed of a molding portion that deforms the molding material when facing the molding material, and a non-molding portion that does not contact the molding material when facing the molding material. The press working method according to claim 1, wherein: At least one preforming roller that forms a deformed portion in the workpiece;
A finish molding roller having a molded part that can further deform the deformed part of the molding material formed by the preforming roller, and a non-molding part having a gap between the molding material When,
Engage the deformed portion of the workpiece and align with the molded portion of the finish forming roller between the most downstream preformed roller of the at least one preformed roller and the finish forming roller A press working apparatus comprising a feed roller having a recess.   4. The feed roller according to claim 3, wherein the feed roller is positioned so as to be biased with respect to the preforming roller and the finish forming roller so that the material to be molded is curved on the feed roller. Press processing equipment. At least one preforming roller having a molded part for forming a deformed part on the molding material and a non-molding part having a gap between the molding material;
A press working apparatus comprising: a finish forming roller having a forming part that can further deform the deformed part of the material to be formed formed by the preforming roller.

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