JP5864073B1 - Trimming device - Google Patents

Abstract

A trimming apparatus capable of improving the shape quality of a cut surface in a cylindrical workpiece is provided. According to the trimming apparatus of the present invention, a workpiece abutting portion that abuts a bottom wall 93 of a cylindrical workpiece 90 of a workpiece inner pressing member 71 and an inner fitting portion 30 having an inner blade 35 are provided. Are provided with slide joints 38K and 57 that allow the workpiece contact portion 37 to slide in the workpiece cutting direction. Further, the slide joints 38K and 57 are provided with a leaf spring 39 for urging the work contact portion 37 to the origin position. [Selection] Figure 4

Description

  The present invention relates to a trimming apparatus that performs trimming by cutting an opening edge of a cylindrical workpiece.

  Generally, in this type of trimming apparatus, an inner fitting portion and an outer fitting portion are fitted inside and outside a cylindrical workpiece, and the bottom wall of the cylindrical workpiece is sandwiched between a workpiece inner pressing member and a workpiece outer pressing member. In this state, the outer fitting portion slides relative to the inner fitting portion, and the opening edge of the cylindrical workpiece is cut by the inner blade and the outer blade provided in the inner fitting portion and the outer fitting portion. (For example, refer to Patent Document 1).

JP 2002-292438 A (FIGS. 7 and 14, paragraphs [0033] and [0036])

  However, in the above-described conventional trimming apparatus, the workpiece outer pressing member slides together with the outer fitting portion, the sliding force acts on the bottom wall of the cylindrical workpiece, the cylindrical workpiece is tilted, and the shape quality of the cut surface is lowered. There was a thing.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a trimming apparatus capable of improving the shape quality of a cut surface in a cylindrical workpiece.

In order to achieve the above object, the invention of claim 1 is characterized in that an inner fitting portion fitted inside a cylindrical workpiece having one end and an outer fitting fitted outside the cylindrical workpiece. A workpiece inner pressing member that protrudes from the inner portion, presses the bottom wall of the cylindrical workpiece from the inside, a workpiece outer pressing member that presses the bottom wall of the cylindrical workpiece from the outer side, and the cylinder A slide for moving one of the inner fitting portion and the outer fitting portion relative to the other in the workpiece cutting direction orthogonal to the fitting direction of the inner fitting portion and the outer fitting portion with respect to the shaped workpiece. Provided in the mechanism, the inner fitting portion and the outer fitting portion, and when one of the inner fitting portion and the outer fitting portion moves relative to the other, the cylinder cooperates with each other. Inner and outer blades for cutting and trimming the opening edge of a shaped workpiece, and the inner pressure of the workpiece Of the material, provided between the workpiece contact portion that contacts the bottom wall of the cylindrical workpiece and the inner fitting portion, the workpiece contact portion is relatively stationary with respect to the outer fitting portion A trimming device including a slide joint that allows the relative movement of the inner fitting portion to the outer fitting portion with respect to the outer fitting portion in a state, wherein the trimming device is formed on the workpiece inner pressing member, A pair of split surfaces which are arranged in parallel with the cutting direction and which divide the work inner pressing member into the work contact part on the distal end side and the support main body part on the proximal end side and have the slide joint therebetween. The slide joint is a trimming device having a bearing structure in which a plurality of pins can roll between the pair of split surfaces.

A second aspect of the present invention is the trimming apparatus according to the first aspect , further comprising an urging unit that urges the work contact portion to an origin position with respect to the support main body portion.

According to a third aspect of the present invention, there is provided a spring accommodating portion formed between the work abutting portion and the support main body portion, a facing surface on the work abutting portion side facing the spring accommodating portion, and the support main body. A slit formed in each of the opposed surfaces on the part side, and a leaf spring as the urging means whose one end is fixed in one of the slits and the other end moves linearly in the other slit The trimming apparatus according to claim 2 , further comprising:

According to a fourth aspect of the present invention, the leaf spring is passed through the other slit so as to protrude to the opposite side of the spring accommodating portion, and the protruding portion is curved to form a hook portion so that the other slit is formed. The trimming device according to claim 3 , wherein the trimming device is locked to the opening edge.

The invention according to claim 5 includes a linear motion hole penetrating the inner fitting portion in a direction orthogonal to the bottom wall of the cylindrical workpiece, and the workpiece inner pressing member is capable of linear motion in the linear motion hole. The workpiece outer pressing member is linearly moved in a direction orthogonal to the bottom wall of the cylindrical workpiece, and the workpiece inner pressing member and the workpiece outer pressing member are moved linearly, wherein a trimming device according to any one of claims work claims 1 to 4 and a linear drive source for clamping said bottom wall of said cylindrical workpiece and the outer pressure member.

According to a sixth aspect of the present invention, there is provided a workpiece conveying means for conveying the cylindrical workpiece in a workpiece conveying direction orthogonal to a fitting direction with respect to the outer fitting portion in a region separated from the outer fitting portion, and the workpiece conveying means. When the cylindrical workpiece is disposed at the coaxial workpiece standby position of the outer fitting portion, the workpiece inner pressing member enters the cylindrical workpiece and the workpiece outer pressing member The trimming device according to claim 5 , further comprising: a control unit that controls the linear drive source so as to sandwich the cylindrical workpiece and move to a fitting position with the outer fitting unit.

According to the invention of claim 7, the cylindrical workpiece has a rectangular tube shape with a rectangular cross section, and is used for a short side for trimming a pair of short side walls of the cylindrical workpiece corresponding to the short side of the rectangular cross section. The outer fitting portion, the inner fitting portion, the workpiece outer pressing member, and the short side trimming stage having the workpiece inner pressing member, and arranged on the downstream side in the workpiece conveying direction from the short side trimming stage, The outer fitting portion for the long side, the inner fitting portion, the workpiece outer pressing member, and the workpiece inner side for trimming a pair of long side sidewalls of the cylindrical workpiece corresponding to the long side of the rectangular cross section and a long side trimming stage having a pressing member, according to claim 6, wherein the sliding joint is provided on at least one of said short sides trimming stage and the long side trimming stage A trimming device.

In the invention according to claim 8, the outer fitting portion is fixed in the workpiece cutting direction with respect to the entire trimming apparatus, and the cylindrical workpiece is held at a fixed position in the workpiece cutting direction by the outer fitting portion. A trimming device according to any one of claims 1 to 7 .

[Inventions of Claims 1, 5 and 6 ]
According to the trimming device of the first aspect, the workpiece inner pressing member is moved from the workpiece inner pressing member to the cylinder by the slide joint provided between the workpiece abutting portion that contacts the bottom wall of the cylindrical workpiece and the inner fitting portion. The sliding force applied to the bottom wall of the shaped workpiece can be suppressed. Thereby, the trimming process can be performed in a state where the inclination in the outer fitting portion of the cylindrical workpiece is suppressed, and the shape quality of the cut surface of the cylindrical workpiece can be improved.

Here, the workpiece inner pressing member may be integrated with the inner fitting portion or may be separate. In the case of a separate body, as in the invention of claim 5, a linear motion hole penetrating the inner fitting portion is provided, and the workpiece inner pressing member is inserted into the linear motion hole so as to be directly separated from the inner fitting portion. The bottom wall of the cylindrical workpiece can be held between the workpiece outer pressing member and the workpiece outer pressing member. Moreover, like invention of Claim 6 , a workpiece | work inner side pressing member and a workpiece | work outer side pressing member can also be utilized as a means for fitting a cylindrical workpiece | work in an outer fitting part.

[Inventions of Claims 2, 3 and 4 ]
If a biasing means for biasing the workpiece contact portion to the origin position with respect to the support main body portion is provided as in the trimming device according to claim 2 , the workpiece contact portion and the contact position with respect to the bottom wall of the cylindrical workpiece are constant. become. The urging means may be a coil spring extending in the workpiece cutting direction or a leaf spring. When the urging means is a leaf spring, a spring housing portion is formed between the workpiece contact portion and the support main body portion as in the configuration of claim 3 , and on the opposing surface across the spring housing portion. If the slit is formed and one end of the leaf spring is fixed in one slit while the other end of the leaf spring is inserted in the other slit so that it can move linearly, the workpiece abutment portion slides relative to the support main body portion. The direction can be limited to the bending direction of the leaf spring by the leaf spring itself. Moreover, according to the structure of Claim 4 , not only the bending elasticity of the flat part of a leaf | plate spring but the elasticity accompanying a deformation | transformation of the curved hook part of the front-end | tip of a leaf | plate spring can be utilized.

[Invention of Claim 7 ]
As in the configuration of claim 7 , the cylindrical workpiece has a rectangular tube shape with a rectangular cross section, a short side trimming stage for trimming a pair of short side walls of the cylindrical workpiece, and the cylindrical workpiece 1 When a long side trimming stage for trimming a pair of long side side walls is provided, a slide joint may be provided on either one of the short side trimming stage or the long side trimming stage, or both May be provided. When the slide joint is provided only on one of the trimming stages, it is preferable to provide the slide joint on the side of the long side trimming stage because the long side trimming stage tends to tilt the cylindrical workpiece.

[Invention of Claim 8 ]
In the configuration of the eighth aspect, the outer fitting portion is fixed in the workpiece cutting direction with respect to the entire trimming apparatus, and the cylindrical workpiece is held at a fixed position in the workpiece cutting direction by the outer fitting portion. It is stable and the shape quality of the cut surface of the cylindrical workpiece can be improved.

The perspective view of the cylindrical workpiece | work which concerns on one Embodiment of this invention. Perspective view of trimming device Perspective view of trimming stage for short side Side sectional view of trimming device in short side trimming stage Sectional drawing of the trimming apparatus in the AA cut surface of FIG. Side sectional view of trimming device in short side trimming stage Perspective view of die and slide cutter Side cross-sectional view of die and slide cutter Front sectional view of trimming device in trimming stage for short side Side sectional view of push-up block Plan view of partially broken up push-up block Front sectional view of push-up block Side sectional view of the trimming device in the long side trimming stage Side sectional view of the trimming device in the long side trimming stage Front sectional view of trimming device in long side trimming stage Sectional drawing of the trimming apparatus in the BB cut surface of FIG. Front sectional view of die and slide cutter Front sectional view of die and slide cutter Plan view of partially broken up push-up block Side view of push-up block Front sectional view of push-up block Side sectional view of a trimming apparatus according to a modified example

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. At the left end of FIG. 1, a cylindrical workpiece 90 to be trimmed by the trimming apparatus 10 (see FIG. 2) of the present embodiment is shown. The cylindrical workpiece 90 has a rectangular tube shape with one end bottomed and the other end open, and a flat cross-sectional shape is rectangular, and a pair of short side walls 91 and 91 positioned at the short side portion of the rectangle, And a pair of long side walls 92 and 92 located at the long side portion, and a bottom wall 93. The cylindrical workpiece 90 is manufactured by drawing a sheet metal a plurality of times by, for example, a transfer press (not shown). For this reason, the cylindrical workpiece 90 has a shape (not shown) in which the opening side end surfaces of the short side wall 91 and the long side side wall 92 are curved, or the bottom wall 93 opens from the short side wall 91 and the long side side wall 92. The height to the side end face may vary. On the other hand, in order to unify the cylindrical workpiece 90 to a predetermined height and to make the opening side end faces of the short side wall 91 and the long side wall 92 substantially flat, the trimming apparatus 10 according to the present invention uses the cylinder. The opening edge of the shaped work 90 is trimmed.

  In the trimming apparatus 10, the cylindrical workpiece 90 is horizontally moved in the opposing direction of the pair of long side walls 92, 92 with the opening 94 facing downward, for example, and as shown in the center of FIG. After the opening edges of the short side walls 91 and 91 are cut, the opening edges of the pair of long side walls 92 and 92 are then cut. Thereby, as shown in the right end of FIG. 1, the cylindrical workpiece 90 has a predetermined constant height, and the opening side end surfaces of the short side wall 91 and the long side wall 92 are substantially flush with each other (exactly, And a slight step of 0.05 [mm] or less).

  In the following description, the direction in which the pair of short side walls 91, 91 of the cylindrical workpiece 90 are opposed to each other is the front-rear direction H1 of the cylindrical workpiece 90 and the trimming apparatus 10, and the pair of long side walls 92, 92 are opposed to each other. The direction is the horizontal direction H2 of the cylindrical workpiece 90 and the trimming device 10.

  As shown in FIG. 2, the trimming apparatus 10 includes a short side trimming stage 20 for trimming the short side walls 91 and 91 of the cylindrical workpiece 90, and a long side trimming stage 50 for trimming the long side walls 92 and 92. Are arranged in the horizontal direction H2, and the transfer device 11 (corresponding to the “work transfer means” of the present invention) that transfers the cylindrical workpiece 90 in the order of the short side trimming stage 20 and the long side trimming stage 50 is provided.

  The transfer device 11 has a structure in which three pairs of clamping members 12 are assembled to a pair of rail members 13 and 13 facing in the front-rear direction H1 and extending in the horizontal direction H2, for example, for short sides and long sides The trimming stages 20 and 50 are arranged above an outer fitting portion 21 described later. Each pair of sandwiching members 12 and 12 is divided into a pair of rail members 13 and 13 so as to be opposed to each other in the front-rear direction H1, and has square grooves 12A and 12A extending vertically on the opposing surfaces. . Then, both the front and rear end portions of the cylindrical workpiece 90 are fitted into the square grooves 12A and 12A. Further, in the horizontal direction H2, the clamping members 12 are arranged at equal intervals, and the rail members 13 and 13 are arranged in the horizontal direction H2 with a stroke having the same length as the interval between the clamping members 12 (hereinafter referred to as “lateral stroke”). While reciprocating, the opening / closing operation | movement which makes the rail members 13 and 13 contact / separate mutually is repeated, and the cylindrical workpiece | work 90 is intermittently conveyed in the horizontal direction H2 as follows.

  That is, in the transfer device 11, when the rail members 13 and 13 are opened, and arranged at one end of the horizontal stroke (hereinafter referred to as “start end” and the opposite is referred to as “end end”), A portion positioned between the pair of sandwiching members 12 and 12 is a workpiece receiving portion P1. Then, for example, the cylindrical workpiece 90 is supplied from the transfer press to the workpiece receiver P1. Then, the rail members 13 and 13 are closed, and the cylindrical workpiece 90 is clamped in a state of being accommodated in the square grooves 12A and 12A of the pair of clamping members 12 and 12 on the start end side. Move to. As a result, the cylindrical workpiece 90 moves directly above the outer fitting portion 21 of the short side trimming stage 20. In this state, the cylindrical workpiece 90 is sandwiched from above and below by a workpiece outer pressing member 70 and a workpiece inner pressing member 71, which will be described later, provided on the short side trimming stage 20, and the rail members 13 and 13 are opened. Then, the rail members 13, 13 move to the start end of the horizontal stroke and return to the initial state, and thereafter the same operation is repeated. Thereby, the cylindrical workpiece 90 is intermittently conveyed from the workpiece receiving portion P1 to the short side trimming stage 20, the long side trimming stage 50, and the workpiece discharge portion P2.

  2 and 3 show a simplified structure of the short-side trimming stage 20, and FIGS. 4 to 12 show a detailed structure of the short-side trimming stage 20. As shown in FIG. 3, the short-side trimming stage 20 includes an inner fitting portion 30 and an outer fitting portion 21 that are fitted to the cylindrical workpiece 90. The outer fitting portion 21 has a pair of support prisms 22 and 22 that are opposed to each other in the front-rear direction H <b> 1 and extend in the vertical direction. The support prisms 22 and 22 are attached to the upper surface of the die 23. ing. In addition, square grooves 22A and 22A extending in the vertical direction are formed on the opposing surfaces of the support prisms 22 and 22, respectively. 4 and 5, both end portions of the cylindrical workpiece 90 in the front-rear direction H1 are fitted into the square grooves 22A and 22A of the support prism 22 from above.

  Note that the inner surface of the upper end portion of each square groove 22A is inclined so as to gradually widen in both the front-rear direction H1 and the lateral direction H2 as it goes upward.

  As shown in FIG. 5, the die 23 has a structure including the pair of girders 23J and 23J shown in FIG. 9 on both side edges of the lower surface of the flat plate portion 23H extending in the front-rear direction H1. , 23J are fixed in a state in which the lower surface of the support block 29 is in contact with the upper surface of the support block 29. And as shown in FIG. 5, the above-mentioned support prisms 22 and 22 are arrange | positioned in the horizontal direction H2 center of the upper surface of the flat plate part 23H, and the position near both ends of the front-back direction H1. Further, in the portion of the flat plate portion 23H sandwiched between the support prisms 22 and 22 in the front-rear direction H1, a work lower end receiving hole 23K that receives the lower end portion of the cylindrical work 90 and positions it in the front-rear and lateral directions H2 is formed. Has been. Furthermore, a pair of opposing projecting walls 23T and 23T (see FIGS. 5 and 9) are provided at both ends of the lower surface of the flat plate portion 23H in the front-rear direction H1. These opposing projecting walls 23T, 23T are abutted against the upper surface of the support block 29, extending in the front-rear direction H1 and having the same height as the girder 23J.

  FIG. 7 shows a state in which a pair of opposed projecting walls 23T and 23T arranged on one end side in the front-rear direction H1 are looked up from below. Of the pair of opposed projecting walls 23T, 23T, the distance between the opposed surfaces facing each other in the lateral direction H2 is larger than the distance between the opposed surfaces facing each other in the lateral direction H2 among the inner surfaces of the cylindrical workpiece 90 (see FIG. 1). Slightly smaller. And the horizontal edge part which the part located in the both ends of the front-back direction H1 among the inner surfaces of the workpiece | work lower end receiving hole 23K cross | intersects the lower surface of the flat plate part 23H has comprised the 1st outer blade 25A. Further, the edge portions of the opposing projecting walls 23T and 23T extending downward on both sides of the first outer cutter 25A constitute a pair of second outer cutters 25B and 25B. The first outer cutter 25A and the second outer cutter 25B Thus, the outer blade 25 according to the present invention is configured.

  A guide square member 23G is attached between the opposed projecting walls 23T and 23T facing each other in the lateral direction H2. As shown in FIG. 4, the guide square member 23G has a structure in which an inclined surface is provided at one end on the workpiece lower end receiving hole 23K side in a prismatic body extending in the front-rear direction H1 between the opposed projecting walls 23T and 23T. The inclined surfaces of both the guide square members 23G and 23G are inclined so as to be separated from each other downward, and are disposed at positions away from the outer blade 25. Further, the workpiece lower end receiving hole 23K side from the inclined surface of each guide square member 23G is a discharge path 23B for discharging scraps separated from the cylindrical workpiece 90 by the outer blade 25 and an inner blade 35 described later. Further, a discharge groove 29 </ b> B for discharging scraps below the support block 29 is formed below each discharge path 23 </ b> B in the support block 29.

  As shown in FIG. 9, a slide cutter 32 and a pair of auxiliary members are provided in a region surrounded by the flat plate portion 23H of the die 23, the support block 29, and a pair of beam portions 23J and 23J on both sides. A movable unit 32K composed of sliders 31, 31 is housed so as to be movable back and forth. Specifically, the slide cutter 32 has a shape that fits just inside the lower end portion of the cylindrical workpiece 90 and has a height that fits between the flat plate portion 23 </ b> H and the support block 29. Further, the pair of auxiliary sliders 31, 31 are slightly smaller than the slide cutter 32 in the front-rear direction H1. The auxiliary sliders 31, 31 are fixed to both side surfaces of the slide cutter 32, and both end portions in the front-rear direction H 1 of the slide cutter 32 protrude slightly forward and backward from the auxiliary sliders 31, 31. Moreover, the edge part along the slide cutter 32 among the upper surfaces of the auxiliary sliders 31 and 31 is depressed in a stepped shape so that the cylindrical workpiece 90 fitted to the slide cutter 32 does not interfere with the auxiliary slider 31. It has become. The movable unit 32K including the slide cutter 32 and the pair of auxiliary sliders 31 and 31 is restricted from moving in the horizontal direction H2 by the pair of beam portions 23J and 23J, and the support block 29 and the flat plate portion 23H. Thus, a slide mechanism 29K is configured that is restricted from moving in the vertical direction and moves linearly only in the front-rear direction H1. Note that the movable unit 32K receives, for example, power for linear motion from a drive source (not shown) (servo motor, air actuator, etc.) through a shaft (not shown) connected to one end surface in the front-rear direction of the auxiliary sliders 31 and 31. It has become.

  An inner fitting block 33 stands from the upper surface of the slide cutter 32. The inner fitting block 33 can be fitted into the cylindrical workpiece 90, and the planar shape of the inner fitting block 33 is slightly smaller in the front-rear direction H1 than the planar shape of the slide cutter 32. Yes. The inner fitting block 33 is fixed to the slide cutter 32 with, for example, a bolt (not shown) to form the inner fitting portion 30, and the inner fitting portion 30 is supported by the slide mechanism 29 </ b> K so as to be linearly movable in the front-rear direction H <b> 1. Has been.

  Inner blades 35 are provided at both ends of the slide cutter 32 in the front-rear direction H1. Specifically, as shown in FIG. 7, a horizontal edge portion formed by intersecting the upper surface of the slide cutter 32 with the end surface in the front-rear direction H1 forms the first inner blade 35A and both sides of the first inner blade 35A. The edge portion extending vertically in this way forms a pair of second inner blades 35B and 35B, and the inner blade 35 according to the present invention is constituted by the first inner blade 35A and the second inner blade 35B.

  As shown in FIG. 4, the cylindrical workpiece 90 is fitted to the inner fitting portion 30 from above, and as shown in FIG. 8, the positions closer to the lower ends of both short side walls 91, 91 of the cylindrical workpiece 90 are the outer blades. 25 and the inner blade 35. In this state, when the inner fitting portion 30 reciprocates in the front-rear direction H1 together with the support block 29, as shown in the center of FIG. 1, it is below the position near the lower end of the pair of short side walls 91, 91 of the cylindrical workpiece 90. The side is cut off, and the generated scrap is discharged through the discharge path 23B and the discharge groove 29B.

  As shown in FIG. 6, a pair of linear motion holes 33 </ b> A and 33 </ b> A penetrates vertically at positions close to both ends of the inner fitting portion 30 in the front-rear direction H <b> 1. On the line, through holes 29C and 29C having an inner diameter larger than that of the linear motion hole 33A penetrate vertically. The pair of push-up shafts 34, 34 are inserted into the pair of linear motion holes 33A, 33A and the through holes 29C, 29C and supported by the linear motion holes 33A, 33A so as to be linearly movable. Further, the output shaft of a workpiece positioning servomotor 49 (hereinafter simply referred to as “servomotor 49”) is connected to the lower end portions of the push-up shafts 34 via a rotation / linear motion conversion mechanism 48. The linear movement position of the push-up shaft 34 is controlled by a controller 79 (corresponding to the “control unit” of the present invention) connected to the servo motor 49.

  A slide joint 47 is provided in a portion of the push-up shafts 34, 34 that is always located between the support block 29 and the rotation / linear motion conversion mechanism 48. The slide joint 47 is provided with a plurality of rollers (not shown) accommodated between slide members 47A and 47B opposed in the vertical direction, and the slide members 47A and 47B are only in the front-rear direction H1 by a slide engagement mechanism (not shown). It is connected so that it can slide.

  As shown in FIG. 6, the upper end portions of the push-up shafts 34 and 34 are both connected to the push-up block 38, and the push-up shafts 34 and 34 and the push-up block 38 constitute a work inner side pressing member 71 according to the present invention. . The push-up block 38 has a height of about 1/3 of the inner fitting block 33 and has a plane cross-sectional shape substantially the same as the inner fitting block 33. Further, the push-up block 38 is divided into two parts, that is, a work contact part 37 and a support body part 36 according to the present invention at a position close to the upper end, and according to the present invention between the work contact part 37 and the support body part 36. A slide joint 38K is provided.

  Specifically, a pair of attachment holes 36A and 36A are formed in the support main body 36 from the lower surface to the intermediate position in the vertical direction. Further, screw holes 36B, 36B extending horizontally from the front surface and the rear surface and communicating with the respective mounting holes 36A are formed at the upper and lower ends of the support main body 36. As shown in FIG. 10, the tip end of the push-up shaft 34 is inserted into the mounting hole 36A and is prevented from coming off by a set screw B1 screwed into the screw holes 36B and 36B.

  As shown in FIG. 6, a first recess 37 </ b> A is formed on the upper surface of the workpiece contact portion 37 in the center in the longitudinal direction. As shown in FIG. 11, a long hole 37B extending in the front-rear direction H1 is formed at the bottom of the first recess 37A, and a screw hole 36C corresponding to the long hole 37B is formed in the support main body 36. ing. The bolt B2 is screwed into the screw hole 36C through the long hole 37B, and the head portion H of the bolt B2 is received in the first recess 37A. Specifically, in the bolt B2 excluding the head part H, the end part on the head part H side forms a cylindrical part E, and the remaining part is a screw part J thinner than the cylindrical part E. Then, the screw portion J is screwed into the screw hole 36C so that the columnar portion E is abutted against the upper surface of the support main body portion 36, and a slight clearance is formed between the head portion H and the bottom surface of the first recess 37A. In addition, a slight clearance is formed between the outer peripheral surface of the cylindrical portion E and the inner surface of the long hole 37B. Thereby, the workpiece contact portion 37 slides in the front-rear direction H <b> 1 with respect to the support main body portion 36.

  A plurality of pins 40 are rotatably accommodated between the workpiece contact portion 37 and the support body portion 36 so that the workpiece contact portion 37 can slide smoothly with respect to the support body portion 36. ing. In order to accommodate these pins 40, pin group receiving portions 36 </ b> F and 36 </ b> F are formed in the upper surface 36 </ b> K (corresponding to the “divided surface” of the present invention) of the support main body 36 at the positions near both ends, respectively. Further, as shown in FIG. 11, each pin group receiving portion 36F has a rectangular shape whose planar shape extends in the front-rear direction H1. And the partition board 41 is accommodated in each pin group receiving part 36F.

  As shown in FIG. 12, the partition board 41 is formed by bending a sheet metal into an M-shaped cross section, and the planar shape thereof is a rectangle corresponding to the pin group receiving portion 36F. In addition, as shown in FIG. 11, a plurality of rectangular pin receiving holes 41A extending in the horizontal direction H2 are arranged in parallel in the front-rear direction H1 on the partition board 41, and the plurality of pin receiving holes 41A are arranged in parallel. A plurality of pins 40 are accommodated in the housing. The central axis of each pin 40 faces the horizontal direction H2, and as shown in FIG. 10, the diameter of the pin 40 is larger than the depth of the pin group receiving portion 36F. In addition, a pin group receiving portion 37E slightly depressed at a position facing the pin group receiving portion 36F is formed on the lower surface 37K (corresponding to the “divided surface” of the present invention) of the workpiece contact portion 37. Then, the upper part of the group of pins 40 contacts the inner surface of the pin group receiving part 37E from below, and the lower surface 37K of the work contact part 37 is held in a state of slightly floating from the upper surface 36K of the support main body part 36. Thereby, as above-mentioned, the workpiece | work contact part 37 can slide smoothly with respect to the support main-body part 36. FIG.

  A pair of leaf springs 39, 39 (corresponding to “biasing means” of the present invention) is passed between the workpiece contact portion 37 and the support main body portion 36, and the workpiece contact portion 37 is supported. Even if the main body part 36 is slid to an arbitrary position, the origin position (for example, a position where the planar centroid of the work contact part 37 and the planar centroid of the support main body 36 overlap when viewed from above) To come back. Specifically, as shown in FIG. 6, on the upper surface of the workpiece contact portion 37, second recesses 37C and 37C are formed on the front side and the rear side of the first recess 37A, and each of the second recesses 37C. As shown in FIG. 11, a slit 37 </ b> D whose planar shape is horizontally long is formed at the bottom.

  As shown in FIG. 10, a spring accommodating portion 36 </ b> D is formed from the upper surface 36 </ b> K of the support main body 36 to the middle in the vertical direction at a position below the second recess 37 </ b> C in the support main body 36. A slit 36E is also formed at the bottom of the spring accommodating portion 36D. On the other hand, the leaf spring 39 is formed with a hook portion 39A by curving its upper end in a semicircular shape. The lower end portion of the leaf spring 39 is fixed to the lower slit 36E with, for example, an adhesive, and the upper end position of the leaf spring 39 is inserted into the upper slit 37D so as to be directly movable. 39A is locked to the bottom surface of the second recess 37C. As a result, when the work contact portion 37 is slid by receiving an external force, the leaf spring 39 is elastically deformed so that it is inclined inside the spring accommodating portion 36D and a part of the hook portion 39A is drawn into the upper slit 37D. The work contact portion 37 is biased to the origin position by the elastic force.

  As shown in FIG. 2, a workpiece outer pressing member 70 according to the present invention is provided above the push-up block 38 in the short side trimming stage 20. The workpiece outer pressing member 70 is formed by fixing a lower end portion of a pair of pressing shafts 28, 28 extending in the vertical direction to the pressing block 27. The push-down shafts 28 and 28 extend on an extension line of the push-up shafts 34 and 34, and the push-down block 27 has the same planar shape as the push-up block 38. As shown in FIG. 4, the upper end portion of the push-down shaft 28 is connected to a linear motion mechanism 28K provided with an air cylinder 28C as a driven drive source according to the present invention, and a compressed air supply path to the air cylinder 28C. The electromagnetic valve 28 </ b> V included in is controlled to be turned on / off by the controller 79 described above.

  This completes the description of the configuration of the short side trimming stage 20. Next, the operation of the short side trimming stage 20 will be described. As shown in FIG. 2, the cylindrical workpiece 90 is sandwiched between the pair of clamping members 12, 12 on the start end side in the transfer device 11 as described above and above the outer fitting portion 21 of the trimming stage 20 for the short side. It is conveyed to. Then, while the work inner side pressing member 71 rises, the work outer side pressing member 70 descends, and the bottom wall 93 of the cylindrical work 90 is sandwiched between them. Next, after the gap between the pair of clamping members 12, 12 is opened, the workpiece inner pressing member 71 is lowered, and the workpiece outer pressing member 70 is also lowered following this, and as shown in FIG. 90 is fitted inside the outer fitting portion 21 while being sandwiched between the workpiece inner pressing member 71 and the workpiece outer pressing member 70.

  Then, when the rotational position of the servo motor 49 reaches a predetermined position set as NC data in the controller 79, the servo motor 49 stops. In other words, the cylindrical work 90 is positioned and controlled at a predetermined position in the vertical direction by the servo motor 49, and the opening edges of the short side walls 91 and 91 of the cylindrical work 90 are arranged as shown in FIG. Between. In this state, the inner fitting portion 30 reciprocates back and forth. Thereby, as shown in the center of FIG. 1, the opening edge of the short side wall 91 of the cylindrical workpiece 90 is horizontally cut to form the first cut surface 95, and both end portions of the first cut surface 95 are formed. A pair of longitudinal cut surfaces 96, 96 extending downward from the bottom are formed, and the ends of the short side walls 91, 91 are cut into a square shape.

  Here, when the above-described cutting process is performed, the workpiece inner pressing member 71 is also moved in the workpiece cutting direction with respect to the cylindrical workpiece 90 together with the inner fitting portion 30, but as shown in FIG. Since a slide joint 38K is provided between a portion of the member 71 that moves relative to the cylindrical workpiece 90 and a portion that contacts the cylindrical workpiece 90 (work contact portion 37), the inside of the workpiece 71 is provided. The sliding force applied to the bottom wall 93 of the cylindrical workpiece 90 from the pressing member 71 is suppressed, and the inclination of the cylindrical workpiece 90 in the outer fitting portion 21 can be suppressed. Further, as shown in FIG. 6, a slide joint 47 is provided between the workpiece inner pressing member 71 and the rotation / linear motion conversion mechanism 48 to which the power from the servo motor 49 is transmitted. It is not necessary to slide the entire conversion mechanism 48, and the weight of the movable part can be reduced.

  When the above-described cutting process is finished, the workpiece inner pressing member 71 rises, and the workpiece outer pressing member 70 rises following it. At this time, the rail members 13 and 13 of the transfer device 11 are located at the start end of the lateral stroke, and the second side from the start end side of the transfer device 11 is located above the outer fitting portion 21 of the short side trimming stage 20. A pair of clamping members 12 and 12 are arranged. The cylindrical workpiece 90 is clamped between the pair of clamping members 12 and 12, the workpiece inner pressing member 71 is lowered, the workpiece outer pressing member 70 is raised, and the rail members 13 and 13 are moved in a horizontal stroke. After moving to the end, the cylindrical workpiece 90 is conveyed above the outer fitting portion 21 of the long side trimming stage 50. At this time, if the workpiece contact portion 37 of the workpiece inner pressing member 71 that has been in contact with the cylindrical workpiece 90 is deviated from the origin position, it returns to the origin position by the elastic force of the leaf springs 39 and 39.

  This completes the description of the configuration and operation of the short-side trimming stage 20. Next, only the configuration of the long side trimming stage 50 that is different from the short side trimming stage 20 will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected about the structure same as the trimming stage 20 for short sides, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 13, in the die 23 of the long side trimming stage 50, a pair of beam portions 23J and 23J are arranged opposite to each other in the front-rear direction H1. Moreover, in this die | dye 23, as shown in FIG. 15, a pair of edge part which cross | intersects the part which opposes in the horizontal direction among the inner surfaces of the workpiece | work lower end receiving hole 23K, and the lower surface of the flat plate part 23H in this invention. Such outer blades 52, 52 are provided.

  The slide cutter 54 of the long side trimming stage 50 has a flat plate shape as a whole. A slide mechanism 29K is configured in which the slide cutter 54 is supported by the pair of beam portions 23J and 23J, the support block 29, and the flat plate portion 23H so as to be linearly movable only in the lateral direction H2. The slide cutter 54 receives power for linearly moving in the horizontal direction H2 from a drive source (not shown) through a shaft (not shown) connected to one end surface of the horizontal direction H2.

  As shown in FIGS. 15 and 16, the slide cutter 54 includes a pair of side wall receiving grooves 54A, 54A extending in the front-rear direction H1 and penetrating vertically, and the pair of side wall receiving grooves 54A, 54A of the slide cutter 54, A portion sandwiched between 54A is a cutter body 54H.

  As shown in FIG. 15, the inner fitting block 33 is fixed to the upper surface of the cutter main body 54H, and the inner fitting portion 30 according to the present invention is constituted by the cutter main body 54H and the inner fitting block 33. Further, the inner fitting block 33 is slightly smaller than the cutter main body 54H in the lateral direction H2. An edge portion formed by intersecting an upper surface of the cutter body 54H exposed from the inner fitting block 33 and a pair of inner surfaces located in the side wall receiving grooves 54A and 54A and arranged in the lateral direction H2 intersects. It is a pair of inner blades 55, 55 according to the present invention.

  As shown in FIG. 14, slide joints 47 and 47 provided on the push-up shafts 34 and 34 of the long side trimming stage 50 are the same as the slide joints 47 and 47 (see FIG. 6) of the short side trimming stage 20 described above. Although it has the same structure, the slide joint 47 of the short side trimming stage 20 slides in the front-rear direction H1, whereas the slide joint 47 of the long side trimming stage 50 slides in the lateral direction H2.

  The slide joint 57 provided in the push-up block 38 of the long side trimming stage 50 has a different structure from the slide joint 38K of the short side trimming stage 20 and slides in the lateral direction H2. That is, as shown in FIG. 19, the longitudinal direction of the long hole 37B formed in the work contact portion 37 of the push-up block 38 of the long side trimming stage 50 is oriented in the horizontal direction H2. Further, the plurality of pin group receiving portions 36F formed on the upper surface of the support main body portion 36 has a rectangular shape that is long in the lateral direction H2, and the partition board 41 accommodated in each pin group receiving portion 36F has a plurality of pin accommodating portions. The holes 41A are arranged in the horizontal direction H2. And each pin accommodation hole 41A accommodates the pin 40, respectively, and the central axis of these pins 40 is orient | assigned to the front-back direction H1. Thereby, in the long side trimming stage 50, the work contact portion 37 slides in the lateral direction H <b> 2 with respect to the support main body portion 36 by the slide joint 57.

  The slits 37D and 36E provided in the push-up block 38 of the long side trimming stage 50 have a planar shape that is long in the front-rear direction, and a leaf spring 39 is inserted through the slits 37D and 36E. As a result, the workpiece contact portion 37 slid in the lateral direction H <b> 2 with respect to the support main body portion 36 can be returned to the origin position by the resilient force of the leaf spring 39.

  As shown in FIG. 19, in the long side trimming stage 50, the spring accommodating portion 36D has an oblong vertical hole structure. And as shown in FIG. 21, half of the bottom face of spring accommodating part 36D is opened by the side surface recessed part 36R formed in one side surface of the support main-body part 36. As shown in FIG. Further, a closing block 36M is fitted into the side recess 36R, and the opening on the bottom surface of the spring accommodating portion 36D is closed. Furthermore, a counterbore hole 36Z is formed in the closing block 36M, and a bolt B3 passed therethrough is screwed into a screw hole 36N formed in the bottom surface of the side recess 36R. A slit 36E is formed between the groove formed in the closing block 36M and the bottom surface of the side recess 36R. The bolt B3 is passed through the bolt insertion hole 39B formed in the leaf spring 39, and the leaf spring 39 is slit 36E. It is prevented from coming off.

  This completes the description of the configuration of the long side trimming stage 50. Next, the operation of the long side trimming stage 50 will be described. As described above, the cylindrical workpiece 90 that has been subjected to the trimming processing of the short side walls 91 and 91 in the short side trimming stage 20 is conveyed by the transfer device 11 to above the outer fitting portion 21 in the long side trimming stage 50. Is done. Then, as in the case of the short side trimming stage 20, the workpiece inner pressing member 71 and the workpiece outer pressing member 70 (see FIG. 13) of the long side trimming stage 50 sandwich the cylindrical workpiece 90 and the outer fitting portion. The cylindrical workpiece 90 is positioned and controlled at a predetermined position in the vertical direction by the servo motor 49. And the lower end part of the long side wall 92,92 which protruded from the cut surface (1st cut surface 95) of the short side wall 91,91 among the cylindrical workpiece | work 90 is a side wall of the slide cutter 54, as shown in FIG. The receiving grooves 54 </ b> A and 54 </ b> A are inserted, and the positions of the long side walls 92 and 92 near the lower end are disposed between the inner blade 55 and the outer blade 52.

  At this time, in the trimming apparatus 10 according to the present embodiment, the upper surface of the slide cutter 54, that is, the upper surfaces of the inner blades 55 and 55, and the first of the short-side sidewalls 91 and 91 cut first in the cylindrical workpiece 90. The control data of the servo motor 49 is set so that a clearance of 0.05 [mm] or less is formed between the cut surface 95 (see FIG. 1). In this state, the inner fitting portion 30 reciprocates in the lateral direction H2, and the lower edge portions of the long side walls 92, 92 are cut as shown in FIG. A second cut surface 97 (see FIG. 1) is formed in the part, and the entire opening edge of the cylindrical workpiece 90 is trimmed. Then, the workpiece inner pressing member 71 and the workpiece outer pressing member 70 are raised, and the cylindrical workpiece 90 is transferred to the pair of clamping members 12 and 12 on the terminal end side of the transfer device 11, and is conveyed to the workpiece discharge portion P2. Is done.

  Further, when the above-described cutting process is performed, the work inner pressing member 71 together with the inner fitting portion 30 also moves in the work cutting direction with respect to the cylindrical work 90. However, as shown in FIGS. Similarly to the short side trimming stage 20, the work trimming stage 50 is also provided with the slide joint 57, the leaf spring 39, and the slide joint 47 on the workpiece inner pressing member 71. Has the effect of.

  As described above, according to the trimming apparatus 10 of this embodiment, the workpiece inner pressing member 71 is provided between the workpiece contact portion 37 that contacts the bottom wall 93 of the cylindrical workpiece 90 and the inner fitting portion 30. The sliding force applied to the bottom wall 93 of the cylindrical workpiece 90 from the workpiece inner pressing member 71 is suppressed by the slide joints 38K and 57. Thereby, the trimming process can be performed in a state in which the inclination of the cylindrical workpiece 90 in the outer fitting portion 21 is suppressed, and the shape quality of the cut surface of the cylindrical workpiece 90 can be improved. Further, since the slide joints 38K and 57 include a leaf spring 39 that biases the workpiece contact portion 37 to the origin position, the contact position with the workpiece contact portion 37 with respect to the bottom wall 93 of the cylindrical workpiece 90 is constant. become. Furthermore, the outer fitting portion 21 is fixed in the workpiece cutting direction with respect to the entire trimming apparatus 10, and the cylindrical workpiece 90 is held at a fixed position in the workpiece cutting direction by the outer fitting portion 21. Compared with the case where the trimming process is performed by sliding the cylindrical workpiece 90, the posture of the cylindrical workpiece 90 is stabilized, and the shape quality of the cut surface of the cylindrical workpiece 90 can also be improved in this respect.

  Further, the cutting position in the cylindrical workpiece 90 can be easily adjusted or changed to an arbitrary position by position control by the servo motor 49. That is, by changing the setting of the stop position of the workpiece inner pressing member 71 by position control by the servo motor 49, the cut surfaces of the short side wall 91 and the long side wall 92 of the cylindrical workpiece 90 can be made flush. In addition, the cut surface of the short side wall 91 and the cut surface of the long side wall 92 can be shifted, and the overall height of the cylindrical workpiece 90 can be changed. Furthermore, the workpiece inner pressing member 71 and the workpiece outer pressing member 70 are used not only for adjusting the cutting position of the cylindrical workpiece 90 but also as means for fitting the cylindrical workpiece 90 into the outer fitting portion 21. can do.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

  (1) In the above-described embodiment, the workpiece inner pressing member 71 that moves vertically is configured to slide in the workpiece cutting direction with respect to the outer fitting portion 21 together with the inner fitting portion 30 having the inner blade 35. For example, the linear motion holes 33A, 33A through which the push-up shafts 34, 34 of the workpiece inner pressing member 71 pass are formed into elongated holes extending in the workpiece cutting direction, and only the inner fitting portion 30 is in relation to the outer fitting portion 21. It is good also as a structure which slides.

  (2) Also, as shown in FIG. 22, the inner fitting block 33 and the block 29V that supports the inner fitting block 33 from below are fixed in the workpiece cutting direction and are fitted outside the inner fitting block 33. Only the frame-shaped slide cutter 32V may slide in the workpiece cutting direction. In this case, only the slide cutter 32V corresponds to the “inner fitting portion” according to the present invention, and the inner portion of the slide cutter 32V corresponds to the “linear motion hole” according to the present invention.

  (3) Also, for example, as shown in FIGS. 7 and 14 of the above-mentioned Japanese Patent Application Laid-Open No. 2002-292438, a work inner pressing member and an inner blade that are in contact with the inner surface of the bottom wall of the cylindrical work are provided. In the case where the inner fitting portion having the inner fitting portion moves up and down integrally, a split surface may be formed near the tip of the workpiece inner pressing member, and the slide joint according to the present invention may be provided there. Even if it does in this way, the inclination of a cylindrical workpiece | work can be suppressed and the shape quality of a cut surface can be improved.

  (4) In the above-described embodiment, the slide joints 38K and 57 are provided on both the short-side and long-side trimming stages 20 and 50. However, only one of the trimming stages 20 and 50 is provided with a slide joint. In the trimming stage having no slide joint, the push-up block 38 may be in sliding contact with the inner surface of the bottom wall 93 of the cylindrical workpiece 90. Further, when the slide joint is provided only on one of the trimming stages, it is preferable to provide the slide joint on the long side trimming stage because the long side trimming stage tends to tilt the cylindrical workpiece.

  (5) In the above embodiment, the cylindrical workpiece 90 is fixed together with the die 23 in the workpiece cutting direction, and the slide cutter 32 slides. Conversely, the cylindrical workpiece 90 slides together with the die 23. The slide cutter 32 may be fixed.

  (6) Although the cylindrical workpiece 90 of the above embodiment has a rectangular cross section, the present invention is applied to a trimming apparatus that trims the opening edge of a cylindrical workpiece such as a square cross section, a cross section ellipse, a cross section oval, or a cross section polygon. You may apply.

DESCRIPTION OF SYMBOLS 10 Trimming apparatus 20 Trimming stage for short sides 21 Outer fitting part 25 Outer blade 28C Air cylinder (driven drive source)
29K slide mechanism 30 inner fitting portion 35 inner blade 37 work contact portion 38K, 57 slide joint 39 leaf spring 49 workpiece positioning servo motor 50 long side trimming stage 52 outer blade 55 inner blade 70 workpiece outer pressing member 71 workpiece Inner pressing member 90 Cylindrical work 91 Short side wall 92 Long side wall 93 Bottom wall

Claims (8)

An inner fitting portion to be fitted to the inside of the cylindrical work with one end;
An outer fitting portion to be fitted to the outside of the cylindrical workpiece;
A workpiece inner pressing member that protrudes from the inner fitting portion and presses the bottom wall of the cylindrical workpiece from the inside;
A workpiece outer pressing member that presses the bottom wall of the cylindrical workpiece from the outside;
To move one of the inner fitting portion and the outer fitting portion relative to the other in the workpiece cutting direction orthogonal to the fitting direction of the inner fitting portion and the outer fitting portion with respect to the cylindrical workpiece. The sliding mechanism of
Provided in the inner fitting portion and the outer fitting portion, and when one of the inner fitting portion and the outer fitting portion moves relative to the other, An inner blade and an outer blade for cutting and trimming the opening edge;
The workpiece inner pressing member is provided between a workpiece contact portion that contacts the bottom wall of the cylindrical workpiece and the inner fitting portion, and the workpiece contact portion is relatively opposed to the outer fitting portion. A trimming device comprising a slide joint that allows the relative movement of the inner fitting portion in the workpiece cutting direction with respect to the outer fitting portion in a stationary state ,
The workpiece inner pressing member is formed in parallel with the workpiece cutting direction, and the workpiece inner pressing member is divided into the workpiece contact portion on the distal end side and the support main body portion on the proximal end side, and A pair of split surfaces having the slide joints,
The trimming device, wherein the slide joint has a bearing structure including a plurality of pins that can roll between the pair of split surfaces. The trimming apparatus according to claim 1, further comprising an urging unit that urges the workpiece contact portion to an origin position with respect to the support main body portion. A spring accommodating portion formed between the workpiece contact portion and the support body portion;
  Slits respectively formed on the opposing surface on the workpiece contact portion side and the opposing surface on the support main body portion side facing each other across the spring accommodating portion;
  The trimming apparatus according to claim 2, further comprising: a leaf spring as the urging means whose one end is fixed in one of the slits and whose other end moves linearly in the other slit. The leaf spring is passed through the other slit and protruded to the opposite side of the spring accommodating portion, and the protruding portion is bent to form a hook portion and locked to the opening edge of the other slit. The trimming apparatus according to claim 3. A linear motion hole penetrating the inner fitting portion in a direction orthogonal to the bottom wall of the cylindrical workpiece;
  The workpiece inner pressing member is inserted into the linear movement hole so as to be linearly movable,
  The workpiece outer pressing member linearly moves in a direction orthogonal to the bottom wall of the cylindrical workpiece,
  A linear motion drive source that linearly moves the workpiece inner pressing member and the workpiece outer pressing member to clamp the bottom wall of the cylindrical workpiece between the workpiece inner pressing member and the workpiece outer pressing member. The trimming apparatus according to any one of claims 1 to 4. A workpiece transfer means for transferring the cylindrical workpiece in a workpiece transfer direction orthogonal to a fitting direction with respect to the outer fitting portion in a region separated from the outer fitting portion;
  When the cylindrical workpiece is disposed at a coaxial workpiece standby position of the outer fitting portion by the workpiece conveying means, the workpiece inner pressing member enters the cylindrical workpiece and the workpiece outer pressing member The trimming apparatus according to claim 5, further comprising: a control unit that controls the linear motion drive source so that the cylindrical workpiece is sandwiched therebetween and moved to a fitting position to the outer fitting unit. The cylindrical workpiece has a rectangular tube shape with a rectangular cross section, and the outer fitting portion for a short side for trimming a pair of short side walls of the cylindrical workpiece corresponding to the short side of the rectangular cross section, A trimming stage for short sides having an inner fitting portion, the workpiece outer pressing member, and the workpiece inner pressing member;
  The outer fitting for the long side for trimming a pair of long side walls of the cylindrical work corresponding to the long side of the rectangular cross section, which is arranged downstream of the short side trimming stage in the workpiece conveying direction. A long side trimming stage having a joint portion, the inner fitting portion, the workpiece outer pressing member and the workpiece inner pressing member,
  The trimming apparatus according to claim 6, wherein the slide joint is provided on at least one of the short side trimming stage and the long side trimming stage.   The outer fitting portion is fixed in the workpiece cutting direction with respect to the entire trimming apparatus, and the cylindrical workpiece is held at a fixed position in the workpiece cutting direction by the outer fitting portion. A trimming device according to claim 1.

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