Dressing device

Abstract

Provided is a dressing device capable of suppressing the shape quality of a cylindrical workpiece from being damaged after the cylindrical workpiece is dressed. When at least one of the core bar punch (33) and the dressing tool (31A) is moved and dressing is performed by the core bar cutting edge (33f) and the tool cutting edge (31f), gaps (H1, H2) are generated between the core bar punch (33) and the workpiece (W). Damping mechanisms (100A) and (100B) are arranged in the gaps (H1) and (H2). The damping mechanisms (100A, 100B) are disposed so as to come into contact with the workpiece (W) during trimming by the core bar cutting edge (33f) and the tool cutting edge (31f), and are configured so as to elastically deform when a force acts in the direction in which the trimming tool (31A) moves forward and backward.

Description

Technical Field

[0001] The present invention relates to a trimming device for cutting off the opening edge of a cylindrical workpiece. Background Art

[0002] Generally speaking, in such a trimming device, 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 set to a state where the inner and outer sides are sandwiched. 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 of the inner fitting portion and the outer blade of the outer fitting portion (for example, refer to Patent Document 1).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2002-292438 Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] However, in the above-mentioned conventional trimming device, when cutting the opening edge of the cylindrical workpiece, the bottom of the cylindrical workpiece may slide and the cylindrical workpiece may tilt, thereby impairing the shape quality after trimming. This may result in reduced shape quality of the cut surface. In addition, the cutting of the opening edge of the cylindrical workpiece is performed sequentially on each side surface. If the cylindrical workpiece tilts when cutting the opening edge of the cylindrical workpiece, the height of the cut portion is different on each side surface, which may cause a height difference.

[0008] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a dressing device capable of suppressing deterioration in shape quality of a cylindrical workpiece after dressing.

[0009] (II) Technical solution

[0010] (1) The dressing device of the present invention is characterized in that it comprises:

[0011] A first trimming member having a first blade portion and a main body portion, movable in a first direction and disposed inside the cylindrical workpiece;

[0012] a second dressing member having a second cutting edge portion and arranged so that a side portion of the cylindrical workpiece is located between the first cutting edge portion and the second cutting edge portion; and

[0013] a moving mechanism capable of moving at least one of the first trimming member and the second trimming member in a second direction orthogonal to the first direction,

[0014] The trimming device moves at least one of the first trimming member and the second trimming member in the second direction, and trims the other end of the cylindrical workpiece using the first blade and the second blade.

[0015] in,

[0016] The dressing device is configured to generate a first gap between the first blade portion and the cylindrical workpiece in a state where the first dressing member is arranged inside the cylindrical workpiece.

[0017] The trimming device is configured to generate a second gap between the main body and the cylindrical workpiece when at least one of the first trimming member and the second trimming member is moved in the second direction and the other end of the cylindrical workpiece is trimmed by the first blade and the second blade.

[0018] The trimming device further includes a guide member disposed in the second gap.

[0019] The guide member is configured to suppress inclination of the cylindrical workpiece by being arranged in the second gap in abutment with the cylindrical workpiece when trimming at least the other end of the cylindrical workpiece by the first blade and the second blade, and is configured to elastically deform when a force acts in the second direction.

[0020] According to the above-mentioned dressing device, a first gap is generated between the first blade and the cylindrical workpiece in a state where the first dressing component is arranged on the inner side of the cylindrical workpiece. In addition, the guide component is configured so that the second gap generated between the main body and the cylindrical workpiece when the other end of the cylindrical workpiece is trimmed by the first blade and the second blade abuts against the cylindrical workpiece. The guide component is configured to be elastically deformed if a force acts in the second direction. Therefore, when the other end of the cylindrical workpiece is trimmed, the inclination of the cylindrical workpiece can be suppressed without hindering the trimming of the other end of the cylindrical workpiece by the first blade and the second blade, and the shape quality of the cylindrical workpiece after trimming can be suppressed from being damaged.

[0021] (2) In the above-mentioned dressing device, the guide member is preferably provided at least at a first position and a second position with a predetermined interval in the first direction.

[0022] (3) In the above-mentioned dressing device, the guide member is preferably provided to extend in the first direction.

[0023] (4) A transfer press machine may include the trimming device described in any one of (1) to (3) above.

[0024] (III) Beneficial effects

[0025] According to the present invention, it is possible to provide a trimming device capable of suppressing deterioration in shape quality of a cylindrical workpiece after trimming. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a front view showing an example of a transfer press for performing finishing processing on a workpiece.

[0027] Figure 2 This is a diagram showing an example of the dressing device of the present invention, and is a plan view seen from the upper end surface of the working rod.

[0028] Figure 3 is an explanatory diagram showing an example of a finishing processing portion processed along the transfer direction, Figure 2 The AA line cross-sectional view is shown.

[0029] Figure 4 The figures are explanatory diagrams showing an example of a processing method for a workpiece, (a) is a diagram showing the shape before finishing processing, (b) is a diagram showing the shape of one of the side surfaces in the transfer direction orthogonal to the transfer direction after being processed, (c) is a diagram showing the shape of the other side surface in the transfer direction orthogonal to the transfer direction after being processed, (d) is a diagram showing the shape of the side surface on the rear side in the transfer direction after being processed, and (e) is a diagram showing the shape of the side surface on the front side in the transfer direction after being processed.

[0030] Figure 5 This is an explanatory diagram showing an example of a trimming portion processed along the feeding direction, and is a schematic cross-sectional view before the trimming process.

[0031] Figure 6 This is an explanatory diagram showing an example of a trimming portion processed along the feeding direction, and is a schematic cross-sectional view during the trimming process.

[0032] Figure 7 It is an explanatory diagram showing an example of a trimming portion processed along the feeding direction, and is a schematic cross-sectional view after the trimming process.

[0033] Figure 8 This is a modified example of a cross-sectional schematic diagram showing an example of a trimming portion processed along the feeding direction, and is a cross-sectional schematic diagram showing the trimming portion when a plunger portion is attached to the core metal punch instead of the damping mechanism. DETAILED DESCRIPTION

[0034] Reference Figure 1~Figure 4 The embodiments of the present invention are described below. Figure 1 This is a front view showing an example of a transfer press for performing trimming. Figure 2 1 is a diagram showing an example of the dressing device of the present invention, and is an example of a plan view seen from the upper end surface of the working rod. Figure 3is an explanatory diagram showing an example of a finishing processing portion processed along the transfer direction, Figure 2 An example of a cross-sectional view taken along line AA is shown. Figure 4 The figures are explanatory diagrams showing an example of a processing method for a workpiece, (a) is a diagram showing the shape before finishing processing, (b) is a diagram showing the shape of one of the side surfaces in the transfer direction orthogonal to the transfer direction after being processed, (c) is a diagram showing the shape of the other side surface in the transfer direction orthogonal to the transfer direction after being processed, (d) is a diagram showing the shape of the side surface on the rear side in the transfer direction after being processed, and (e) is a diagram showing the shape of the side surface on the front side in the transfer direction after being processed.

[0035] In addition, in this manual, Figure 1 The direction from the left side of the paper to the right side of the paper is the transfer direction, and the direction horizontally perpendicular to the transfer direction (with Figure 1 The direction perpendicular to the paper plane) is the transfer perpendicular direction. Figure 3 An example of processing along the transfer direction (i.e., an example in which the long side of the workpiece W is processed) is shown, but processing is also performed in the direction perpendicular to the transfer direction (i.e., the short side of the workpiece W is also processed). Figure 5~Figure 8 The same is true.

[0036] (Trimming device)

[0037] exist Figure 1 In the transfer press 1 shown, a slide block 3 that can move up and down, gate cams 4, 4 that move the slide block 3 up and down, a drive rotary shaft 5 that fixes the gate cams 4, 4 and is rotatably supported by the gate cams, and a motor 6 that drives the drive rotary shaft 5 are provided on the upper half of a frame 2. The slide block 3 reciprocates up and down by the rotation drive of the motor 6. An upper die set 7 equipped with a plurality of drawing punches (not shown) for drawing processing is engaged with the lower end of the slide block 3.

[0038] In addition, the lower half of the frame 2 is provided with: a pad 8; a lower stage 14, which is fixed on the pad 8; a lower die set 9, which is equipped with a plurality of drawing dies (not shown), which are used to cooperate with a plurality of drawing punches for drawing processing, and the plurality of drawing punches are engaged with the lower stage 14 and move up and down; a transmission rod (not shown), which is arranged on the upper surface of the lower die set 9 along the Figure 1 a finger portion not shown, which holds each workpiece at a corresponding position of each processing step of the transmission rod and transfers it to a downstream process; and a transmission drive mechanism 10, which drives the transmission rod together with the finger portion.

[0039] The transmission drive mechanism 10 is driven by an intermediate shaft 12 that rotates synchronously with the driving rotary shaft 5. An auxiliary drive shaft 13 is connected to the intermediate shaft 12 so as to be able to rotate synchronously. A rotary transformer 29 is provided near the end of the intermediate shaft 12 to detect the rotation angle position of the auxiliary drive shaft 13 and output a start signal for the servo motor 41 of the toggle mechanism 40. In addition, on the upstream side of the process of the transfer press 1, there are provided servomotors 41 that are arranged at equal intervals from the left side of the figure. Figure 4 The first stamping and drawing process for forming the square cylindrical workpiece W shown in (a) and multiple drawing processes after the next process are provided, and on the downstream side thereof, there are a trimming process at a processing position 30A where the openings of the short side walls Wb and Wc of the workpiece W are cut off (hereinafter referred to as "trimming process") and a trimming process at a processing position 30B where the openings of the long side walls Wd and We of the workpiece W are trimmed.

[0040] In addition, the workpiece W is at one end ( Figure 4 The end portion on the lower side of the paper surface) has a bottom, and the end portion on the other side ( Figure 4 A cylindrical workpiece with a bottom and an opening (at the end portion on the upper side of the paper).

[0041] A trimming device 20 is installed near the processing positions 30A and 30B in the trimming process. Figure 2 As shown, with respect to the dressing device 20, an elbow mechanism 40 is provided on the support table 21 fixed to the side surface of the pad 8, and through the elbow mechanism 40, the working rod 25 of the die base 15A provided on the upstream side and the working rod 26 of the die base 15B provided on the downstream side are moved forward and backward on the working axis line orthogonal to the transfer axis line of the workpiece W. The "working axis line orthogonal to the transfer axis line of the workpiece W" is a direction horizontally orthogonal to the transfer direction of the workpiece W. In addition, the "elbow mechanism 40" is equivalent to the "moving mechanism" of the present invention. However, the "moving mechanism" of the present invention is certainly not limited to the "elbow mechanism 40", for example, it can also be directly used by an actuator to move the tool table 36A, the tool table 36B, and the core punch (all refer to Figure 3 ) automatic machines working, etc.

[0042] Then, the square cylindrical workpiece W transferred from the upstream drawing process to the processing position 30A in the trimming process is subjected to the forward and backward movement of the working rod 25, so that the trimming tools 31A and 31B described later are moved forward and backward. Figure 4The openings of the short-side tube walls Wb and Wc shown in (a) are trimmed. For the square tube-shaped workpiece W transferred from the processing position 30A in the trimming process to the processing position 30B in the trimming process on the downstream side, the trimming tools 31A and 31B are used to trim the openings of the long-side tube walls Wd and We of the workpiece W by the forward and backward movement of the working rod 26. In addition, the direction in which the trimming tools 31A and 31B move forward and backward ( Figure 2 The left-right direction on the paper of FIG. 10 ) corresponds to the “second direction” of the present invention. For example, the transfer direction and the transfer orthogonal direction both correspond to the “second direction”.

[0043] The “dressing tool 31A” and the “dressing tool 31B” correspond to the “second dressing member” of the present invention. Moreover, the “core punch 33” described later corresponds to the “first dressing member” of the present invention.

[0044] Then, if Figure 2 As shown, in the toggle mechanism 40 for moving the working rods 25 and 26 forward and backward, a servomotor 41 is provided on the support table 21, and a crankshaft 42 driven to rotate by the servomotor 41 via a joint 43 is supported on the bearing base plates 22 and 22 on the support table 21. One end of a connecting rod (not shown) is relatively rotatably supported on the eccentric shaft portion of the crankshaft 42, and a swing shaft 45 is fixed to the other end of the connecting rod, and a swing base shaft 46 is fixed to the bearing leg plate 23 on the support table 21.

[0045] The swing link 47 is pivotally supported on the swing base shaft 46 and the swing shaft 45 so as to be able to swing around the swing base shaft 46. In addition, bearing plates (not shown) are fixed to the rear ends of the working rods 25 and 26, respectively, and the working rods 25 and 26 are connected by direct-acting shafts (not shown) inserted through and fastened to the respective bearing plates. The floating link 49 is pivotally supported on the direct-acting shaft and the swing shaft 45 so as to be able to float around the swing shaft 45.

[0046] The toggle mechanism 40 thus constructed is Figure 1 The start signal of the rotary transformer 29 shown is used to control the rotation of the servo motor 41 by a control unit not shown. When the crankshaft 42 is rotated by the servo motor 41, the connecting rod moves up and down by the eccentric rotation of the eccentric shaft portion, and the swing link 47 swings around the swing base shaft 46 by the up and down movement of the connecting rod, and the floating link 49 floats around the swing shaft 45 on the swing trajectory, thereby causing the upstream side working rod 25 and the downstream side working rod 26 to move forward and backward via the direct-acting shaft and the bearing plate.

[0047] Then, if Figure 3 As shown, at the processing position 30A in the trimming process, the upper die set 7 (refer to Figure 1 ) is engaged with a core punch 33 provided in the trimming tool 31B. Below the core punch 33, a core punch 33 is provided opposite to the core punch 33. Figure 1 ) is moved up and down by a cam not shown. Figure 1 ) on the step down 14 (refer to Figure 1 ) is fastened with a die holder 15A, which is formed to be able to slide and guide the working rod 25 in the horizontal direction and to slide and guide the ejector 35A in the vertical direction. The core punch 33 can move in a manner to be located inside the workpiece W arranged below. The workpiece W transferred by the finger portion not shown is positioned at the core punch 33 and the ejector 35A. Figure 3 The "downward direction" mentioned above corresponds to the "first direction" of the present invention. In addition, the "second direction" mentioned above is orthogonal to the "first direction" in the horizontal direction.

[0048] like Figure 3 As shown, tool tables 36A and 36B are fastened to the work bar 25 by bolts (not shown) at positions abutting against the outer side surface of the workpiece W according to the finishing process. The tool tables 36A and 36B are formed in a planar shape so as to press the outer side surface of the workpiece W with their surfaces, and function as workpiece guides for the outer side surface of the workpiece W.

[0049] Dressing tools 31A and 31B are fastened to the opening side ends of the workpiece W of the tool tables 36A and 36B by bolts (not shown). The dressing tools 31A and 31B are formed in a planar shape so as to be able to abut against the outer side surface of the workpiece W. In addition, tool cutting edges 31f and 31g of the dressing tool 31A are formed at the upper corners of the outer side surface of the workpiece W that is opposite to the outer side wall.

[0050] In addition, in the core punch 33, core cutting edges 33f and 33g are formed at the lower end corners of the outer side surfaces 33b and 33c of the workpiece W that are opposite to the outer side wall, and the tool cutting edges 31f and 31g of the trimming tools 31A and 31B cooperate with the core cutting edges 33f and 33g of the core punch 33 to cut off the openings of the workpiece W. In addition, discharge holes 31j and 31k for discharging the chips of the workpiece W after trimming are respectively perforated in the trimming tools 31A and 31B.

[0051] In addition, the portion of the core punch 33 below the core cutting edges 33f and 33g (hereinafter, this portion is referred to as the "narrow width portion 33A") is narrower than the outer side surfaces 33b and 33c. That is, the distance between the outer side surface 33d and the outer side surface 33e of the narrow width portion 33A is smaller than the distance between the outer side surface 33b and the outer side surface 33c. Therefore, gaps H1 and H2 are generated between the narrow width portion 33A of the core punch 33 and the inner side surface of the workpiece W. For example, when trimming the opening portion (the front and rear side surfaces in the transfer direction) of the workpiece W, the core cutting edge 33f of the core punch 33 abuts against the tool cutting edge 31f, but if there are gaps H1 and H2 between the narrow width portion 33A of the core punch 33 and the inner side surface of the workpiece W, the workpiece W tilts and the shape quality after trimming may be impaired. In particular, the cutting of the opening of the workpiece W is performed sequentially for each side surface. If the workpiece W is tilted when trimming the opening of the workpiece W, the height of the trimmed portion may be inconsistent.

[0052] In addition, the gaps H1 and H2 described above are gaps generated in the transfer direction, but since gaps are also generated in the transfer orthogonal direction, the same technical problem will also occur when trimming the opening portion (the two side surfaces in the transfer orthogonal direction) of the workpiece W. However, the technical problem generated by the gap in the transfer orthogonal direction can be solved by the same solution as the solution for solving the technical problem generated by the gaps H1 and H2 in the transfer direction, and therefore, in this specification, the solution for solving the technical problem generated by the gaps H1 and H2 in the transfer direction is described, and the description of the solution for solving the technical problem generated by the gap in the transfer orthogonal direction is omitted.

[0053] In an embodiment of the present invention, as a solution to the technical problems caused by the gaps H1 and H2 in the transfer direction, the gaps H1 and H2 generated between the narrow width portion 33A of the core punch 33 and the inner side surface of the workpiece W are provided with shock absorbing mechanisms 100A and 100B as pressing parts for pressing the inner side surface of the workpiece W.

[0054] In the embodiment of the present invention, the damping mechanism 100A is provided in the gap H1, and the damping mechanism 100B is provided in the gap H2. If the front side and the rear side in the transfer direction are both subjected to trimming, it is preferable to provide the damping mechanisms 100A and 100B in both the gap H1 and the gap H2. However, since the damping mechanism only needs to be provided in the gap on the side subjected to trimming, it is not necessary to provide the damping mechanisms 100A and 100B in both the gap H1 and the gap H2. For example, in the case of trimming only the rear side in the transfer direction ( Figure 3 When trimming is performed on the left side of the conveying direction, a damping mechanism 100A is provided in the gap H1. Figure 3When trimming is performed on the right side of the workpiece, a damping mechanism 100B may be provided in the gap H2.

[0055] The “narrow width portion 33A” corresponds to the “main body portion” of the present invention, the “core cutting edge 33f” corresponds to the “first blade portion” of the present invention, and the “tool cutting edge 31f” corresponds to the “second blade portion” of the present invention.

[0056] The damping mechanisms 100A and 100B respectively have workpiece pressing parts 110A and 110B as workpiece guides and telescopic parts 120A and 120B. The workpiece pressing parts 110A and 110B are arranged as a pair in a manner opposite to each inner side surface of the workpiece W, and are made of, for example, a non-compressible material made of metal such as iron. The workpiece pressing parts 110A and 110B are located flush with the outer side surfaces 33b and 33c or closer to each inner side surface of the workpiece W than the outer side surfaces 33b and 33c before the trimming process, and abut against the inner side surface of the workpiece W during the trimming process. In addition, the workpiece pressing parts 110A and 110B are preferably formed into a long planar shape that can press the opposing inner side surfaces of the workpiece W with their surfaces.

[0057] The “workpiece pressing portion 110A” and the “workpiece pressing portion 110B” correspond to the “first member” of the present invention, and the “expandable member 120A” and the “expandable member 120B” correspond to the “second member” of the present invention.

[0058] Here, the core punch 33 is described in detail again. The core punch 33 has core cutting edges 33f and 33g formed at the lower corners of the outer side surfaces 33b and 33c, and an inverted convex portion as a narrow width portion 33A is formed at the lower portion. Figure 3 As shown, workpiece pressing portions 110A and 110B formed in a long planar shape are provided in respective gaps generated between the side surface of the narrow width portion 33A of the core metal punch 33 and the inner side surface facing the workpiece W.

[0059] The workpiece pressing parts 110A and 110B are Figure 3 The trimming machine extends in the vertical direction of the paper surface and has a length that does not contact the bottom wall of the inner side surface opposite to the opening of the workpiece W being trimmed.

[0060] The telescopic members 120A and 120B function as elastically deformable elastic parts such as coil springs, and are provided as connecting parts that connect the narrow width part 33A of the core metal punch 33 and the workpiece pressing parts 110A and 110B.

[0061] In addition, in an embodiment of the present invention, Figure 3As shown, two telescopic members 120A, 120B are provided for one workpiece pressing portion 110A, 110B, but the number of the telescopic members 120A, 120B is not limited to two, as long as the workpiece pressing portions 110A, 110B are stably supported and can be appropriately elastically deformed.

[0062] The above-mentioned "appropriate elastic deformation" only needs to be elastic deformation of a degree that does not hinder the contact between the tool cutting edges 31f, 31g and the core cutting edges 33f, 33g. That is, from the viewpoint of suppressing the inclination of the workpiece W during trimming, if before trimming, the contact surface of the workpiece pressing parts 110A, 110B that contacts the inner side surface of the workpiece W (hereinafter referred to as "the contact surface of the workpiece pressing parts 110A, 110B") is preferably closer to the inner side surface of the workpiece W than the core cutting edges 33f, 33g. That is, when the distance from the contact surface of the workpiece pressing parts 110A, 110B to the inner side surface of the workpiece W is shorter than the distance from the core cutting edges 33f, 33g to the inner side surface of the workpiece W, the contact surface of the workpiece pressing parts 110A, 110B contacts the cylindrical workpiece W before the core cutting edges 33f, 33g, and therefore it is preferred. However, during trimming, the tool cutting edges 31f, 31g need to abut against the core cutting edges 33f, 33g. Therefore, the telescopic members 120A, 120B need to be elastically deformed to such an extent that the tool cutting edges 31f, 31g and the core cutting edges 33f, 33g are not hindered from abutting against each other.

[0063] In addition, although it is described above that the abutting surface of the workpiece pressing portion 110A, 110B is preferably closer to the inner side surface of the workpiece W than the core bone cutting edges 33f, 33g, it is not limited to this. In the case where the abutting surface of the workpiece pressing portion 110A, 110B is flush with the core bone cutting edges 33f, 33g, the inclination of the workpiece W during trimming can also be suppressed. Therefore, in the case where the abutting surface of the workpiece pressing portion 110A, 110B is flush with the core bone cutting edges 33f, 33g, the same effect as the case where the distance from the abutting surface of the workpiece pressing portion 110A, 110B to the inner side surface of the workpiece W is closer than the distance from the core bone cutting edges 33f, 33g to the inner side surface of the workpiece W can be achieved.

[0064] The telescopic members 120A and 120B are not limited to coil springs, and may be any member having elasticity or flexibility, such as springs and rubber. The width and size of the telescopic members 120A and 120B may be appropriately changed within the range in which the effects of the present invention are achieved.

[0065] In the embodiment of the present invention, tool tables 36A and 36B are provided as workpiece guides for pressing the outer side surface of the workpiece W, and damping mechanisms 100A and 100B are provided as workpiece guides for pressing the inner side surface of the workpiece W. When trimming the opening of the workpiece W, the tool table 36A (or the tool table 36B) functioning as the outer side workpiece guide and the damping mechanism 100A (or the damping mechanism 100B) functioning as the inner side workpiece guide come into contact with the respective side surfaces of the workpiece W to clamp the workpiece W. That is, the workpiece W can be stably fixed by the tool table 36A (or the tool table 36B) and the damping mechanism 100A (or the damping mechanism 100B).

[0066] The "damper mechanism 100A" and the "damper mechanism 100B" correspond to the "guide member" of the present invention.

[0067] (Workpiece guide)

[0068] Next refer to Figures 5 to 7 An example of the operation of the tool table 36A functioning as the outer side workpiece guide and the damper mechanism 100A functioning as the inner side workpiece guide will be described. Figure 5 This is an explanatory diagram showing an example of a trimming portion processed along the feeding direction, and is a schematic cross-sectional view before the trimming process. Figure 6 This is an explanatory diagram showing an example of a trimming portion processed along the feeding direction, and is a schematic cross-sectional view during the trimming process. Figure 7 1 is an explanatory diagram showing an example of a trimming processing portion processed along the transfer direction, and is a cross-sectional schematic diagram after the trimming processing. Figure 5~Figure 7 In the figure, the tool table 36B is omitted. Figure 5 as well as Figure 6 In the figure, an enlarged view of the area surrounded by a circle is also shown.

[0069] The damping mechanism 100B is provided from the tool stand 36B (refer to Figure 3 ) is applied in the opposite direction to the force applied to the damping mechanism 100A from the tool table 36A. Therefore, although the operating direction of the damping mechanism 100B is opposite to the operating direction of the damping mechanism 100A, the operating mode of the damping mechanism 100B is the same as that of the damping mechanism 100A, and therefore, the description of the operating mode of the damping mechanism 100B is omitted.

[0070] like Figure 5 As shown, if the workpiece W is positioned at the lower end position, the tool table 36A and the work bar 25 (refer to Figure 2 as well as Figure 3 ) together from Figure 5The initial position shown moves toward the outer side surface direction of the workpiece W (advance direction).

[0071] In addition, as described above, before the trimming process, that is, the tool table 36A is located Figure 5 In the initial position shown, the abutting surface of the workpiece pressing portion 110A is preferably flush with the core cutting edge 33f or closer to the inner side surface of the workpiece W than the core cutting edge 33f. Figure 5 In the embodiment, the abutment surface of the workpiece pressing portion 110A is closer to the inner side surface of the workpiece W than the core cutting edge 33f. That is, the abutment surface of the workpiece pressing portion 110A is located closer to the inner side surface of the workpiece W than the core cutting edge 33f. Figure 5 on the left side of the paper.

[0072] Then, if Figure 6 As shown, after the tool table 36A contacts the outer side surface of the workpiece W, if the outer side surface of the workpiece W is further moved toward Figure 6 If a force is applied to the right side of the paper, the damping mechanism 100A contacts the workpiece W. Furthermore, if a force is applied to the outer side of the workpiece W by the tool table 36A, the direction in which the telescopic member 120A contracts ( Figure 5 Therefore, the posture of the workpiece W can be stabilized and the deformation of the workpiece W can be suppressed, and the core cutting edge 33f of the core punch 33 abuts against the inner side surface of the workpiece W. The suppression of the deformation of the workpiece W will be described later.

[0073] Furthermore, if the core metal cutting edge 33f of the core metal punch 33 abuts against the inner side surface of the workpiece W, Figure 6 As shown in the enlarged view of FIG. 1 , the opening of the workpiece W is trimmed by the cooperation of the tool cutting edge 31 f of the trimming tool 31A and the core metal cutting edge 33 f of the core metal punch 33 .

[0074] In this way, a shock absorbing mechanism 100A is arranged in the above-mentioned gap H1, and at least when the trimming process is performed, the abutting surface of the workpiece pressing portion 110A abuts against the inner side surface of the workpiece W. In addition, the shock absorbing mechanism 100A has a telescopic component 120A. Therefore, when the opening portion of the workpiece W is trimmed, the tool cutting edge 31f and the core bone cutting edge 33f will not be hindered from trimming the opening portion of the workpiece W, and the posture of the workpiece W can be stabilized. That is, the tool cutting edge 31f and the core bone cutting edge 33f will not be hindered from trimming the opening portion of the workpiece W, and the inclination of the workpiece W can be suppressed, and the shape quality of the workpiece W after trimming can be suppressed. In particular, after trimming the four side surfaces of the workpiece W in sequence, the height inconsistency of the trimmed portion can be suppressed, and the height after trimming can be made uniform. Moreover, for example, even when only one of the four side surfaces of the workpiece W is trimmed, the deformation of the workpiece W can be suppressed. Therefore, it is possible to cut straight, for example, the inclination of the cut surface can be suppressed. In detail, for example, in the case of Figure 4 (d) When the corner of the workpiece W is cut in this way, the corner abuts against the cutting edge (the tool cutting edge 31 and the core cutting edge 33f) before other parts. Therefore, if there is no damping mechanism 100A in the gap H1 (the same applies to the gap H2), the opening of the workpiece W will be deformed during the trimming process. The longer the length of the trimmed side is, the more significant the deformation is, and the problem of quality degradation becomes more significant. In this regard, by providing a damping mechanism (damping mechanism 100A or damping mechanism 100B) in the gap on the trimmed side (gap H1 or gap H2), the deformation of the workpiece W can be suppressed, and the quality degradation can be suppressed.

[0075] In addition, as described above, the workpiece pressing parts 110A and 110B are made of non-compressible materials, and are configured so that if a force acts on the workpiece W from the tool tables 36A and 36B and the abutting surfaces of the workpiece pressing parts 110A and 110B abut against the inner side surface of the workpiece W, the telescopic parts 120A and 120B are elastically deformed. Therefore, compared with when the workpiece pressing parts 110A and 110B are compressible parts, it is possible to resist the force acting in the inclined direction of the workpiece W. In addition, since the telescopic parts 120A and 120B are arranged between the workpiece pressing parts 110A and 110B and the narrow width part 33A, the trimming performed by the tool cutting edge 31f and the core bone cutting edge 33f will not be hindered. As a result, the trimming of the opening of the workpiece W can be appropriately performed.

[0076] After the trimming process, if the tool table 36A moves away from the outer side surface of the workpiece W (retracts), the contact between the workpiece pressing portion 110A and the workpiece W is first released. Figure 7 As shown, the tool table 36A returns to the initial position.

[0077] In the embodiment of the present invention, the tool table 36A moves while pressing the workpiece W, and the workpiece pressing portion 110A presses the workpiece W so that the workpiece W does not tilt, so the workpiece W is clamped and stabilized. This can prevent the workpiece W from tilting when cutting the opening of the workpiece W, that is, performing trimming.

[0078] Furthermore, the damper mechanisms 100A and 100B described above are integrally configured in the vertical direction, but are not limited thereto, and may be divided into a plurality of parts in the vertical direction or / and in the direction orthogonal to the conveyance (ie, the depth direction), for example.

[0079] Furthermore, when trimming the opening of the workpiece W, it is not necessary to move both the trimming tools 31A and 31B forward and backward, and only the trimming tool on the trimming side may be moved forward and backward.

[0080] In addition, the abutting surface of the workpiece pressing portion 110A only needs to abut against the inner side surface of the workpiece W at least during the trimming process. Therefore, the abutting surface of the workpiece pressing portion 110A can be abutted against the inner side surface of the workpiece W before the trimming process is performed, or the abutting surface of the workpiece pressing portion 110A can be abutted against the inner side surface of the workpiece W during the trimming process.

[0081] In the embodiment of the present invention, the damping mechanism 100A, 100B is described as being composed of the workpiece pressing parts 110A, 110B as the inner side workpiece guides and the telescopic members 120A, 120B, but the present invention is not limited thereto. Figure 8 , modifications of the damping mechanisms 100A and 100B are described.

[0082] (Variation)

[0083] Figure 8 1 is a modified example of a cross-sectional schematic diagram showing an example of a trimming portion processed along the transfer direction, and is a cross-sectional schematic diagram showing a trimming portion when plunger portions 200A and 200B are installed on the core metal punch 33 instead of the above-mentioned damping mechanisms 100A and 100B. In the modified example described below, the gaps H1 and H2 and the workpiece W are marked with Figures 1 to 7 The core metal punch 33A has a larger thickness in the transfer direction than the core metal punch 33 so that the plunger parts 200A and 200B can be embedded, but there is no limitation as long as the plunger parts 200A and 200B can be attached to the core metal punch 33A.

[0084] The plungers 200A and 200B are pressing members that press the workpiece W from the inside. For example, two plungers 200A are arranged vertically at a predetermined interval in the gap H1. For example, two plungers 200B are arranged vertically at a predetermined interval in the gap H2.

[0085] The plunger portion 200A is composed of a pin component 210A made of a non-compressible material and a spring component 220A having elasticity. The pin component 210A has the function of abutting against the inner side surface of the workpiece W in the same manner as the above-mentioned workpiece pressing portion 110A, and the spring component 220A has the same function as the above-mentioned elastic component 120A. Similarly, the plunger portion 200B is composed of a pin component 210B made of a non-compressible material and a spring component 220B having elasticity. The pin component 210B has the function of abutting against the inner side surface of the workpiece W in the same manner as the above-mentioned workpiece pressing portion 110B, and the spring component 220B has the same function as the above-mentioned elastic component 120B. Therefore, the plunger portions 200A and 200B can achieve the same effect as the case of using the above-mentioned damping mechanisms 100A and 100B. That is, when trimming the opening of the workpiece W, the posture of the workpiece W can be stabilized without hindering the trimming of the opening of the workpiece W, and deformation of the workpiece W can be suppressed, and the height inconsistency of the trimmed portion can be suppressed. In addition, since the pin members 210A and 210B are made of a non-compressible material and the spring members 220A and 220B are elastic, the trimming of the opening of the workpiece W can be appropriately performed.

[0086] In addition, Figure 8 In the illustrated modification, two plunger parts 200A and 200B are disposed on each inner side surface of the workpiece W, but the present invention is not limited thereto, and any structure may be used as long as the inner side surfaces of the workpiece W can be stably pressed and appropriately elastically deformed.

[0087] In addition, for example, when the distance between the core punch 33 and the inner side surface of the workpiece W is small and the damping mechanism 100A, 100B and the plunger 200A, 200B cannot be arranged, a rubber sheet or other elastic material can be attached to the core punch 33 (more specifically, the narrow width portion 33A). In this way, the same effect as the damping mechanism 100A, 100B and the plunger 200A, 200B described above can be achieved. However, it is foreseeable that the rubber and resin materials will deteriorate, so there is a situation where it is difficult to precisely manage the pressing pressure, but the shape quality of the workpiece cut portion can be obtained by managing the function through appropriate maintenance.

[0088] Furthermore, the damping mechanisms 100A, 100B and the plunger parts 200A, 200B may be components formed of elastic or resilient materials such as springs or coil springs, and may be components processed into a silicone or sponge shape, for example.

[0089] The embodiments of the present invention should be considered to be illustrative in all aspects and not restrictive. The basic scope of the present invention is not indicated by the above-mentioned embodiments but by the claims, and is intended to include all changes within the meaning and scope equivalent to the claims.

[0090] Description of reference numerals:

[0091] 1: multi-station press; 20: dressing device; 25, 26: working rod; 30A, 30B: dressing process; 31A, 31B: dressing tool; 31f, 31g: tool cutting edge; 33: core bone punch; 33f, 33g: core bone cutting edge; 36A, 36B: tool table; 100A, 100B: shock absorbing mechanism; 110A, 110B: workpiece pressing part; 120A, 120B: telescopic part; 200: plunger part; 210: pin part; 220: spring part; W: workpiece.

Claims

1. A dressing device comprising: A first trimming member having a first blade portion and a main body portion, movable in a first direction and disposed inside the cylindrical workpiece; a second dressing member having a second cutting edge portion and arranged so that a side portion of the cylindrical workpiece is located between the first cutting edge portion and the second cutting edge portion; and a moving mechanism capable of moving at least one of the first trimming member and the second trimming member in a second direction orthogonal to the first direction, The trimming device moves at least one of the first trimming member and the second trimming member in the second direction, and trims the other end of the cylindrical workpiece using the first blade and the second blade. in, The dressing device is configured to generate a first gap between the first blade portion and the cylindrical workpiece in a state where the first dressing member is arranged inside the cylindrical workpiece. The trimming device is configured to generate a second gap between the main body and the cylindrical workpiece when at least one of the first trimming member and the second trimming member is moved in the second direction and the other end of the cylindrical workpiece is trimmed by the first blade and the second blade. The trimming device further includes a guide member disposed in the second gap. The guide member is configured to suppress inclination of the cylindrical workpiece by being arranged in the second gap in abutment with the cylindrical workpiece when trimming at least the other end of the cylindrical workpiece by the first blade and the second blade, and is configured to elastically deform when a force acts in the second direction.

2. The trimming device according to claim 1, characterized in that: The guide member is provided at least at a first position and a second position with a predetermined interval in the first direction.

3. The trimming device according to claim 1, characterized in that: The guide member is extended in the first direction.

4. A multi-station press comprising the trimming device according to any one of claims 1 to 3.

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