JP3921039B2 - Forceps component manufacturing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a forceps portion having a cup-shaped cup portion and an arm portion extending from the cup portion.GoodsIt relates to a manufacturing method.
[0002]
[Prior art]
  Conventionally, a forceps component has a cup-shaped (for example, semi-elliptical spherical shell) cup portion and an arm portion extending from the cup portion. For example, a biopsy forceps that is a treatment instrument for an endoscope It is used for the tip part.
[0003]
  The forceps component can be rotated about the support shaft by combining the two and attaching a substantially cylindrical support shaft to a through hole provided in the forceps component. That is, the forceps component is used as a so-called openable “scissors” forceps that forms an elliptical spherical shell shape when the two cup portions are closed and abut, and opens the mouth when the two cup portions are separated. Then, the sample of the affected part in the body is excised as a sample and grasped, so that the sample is removed from the body.
[0004]
  Next, the use application of the forceps component used at the distal end portion of the biopsy forceps which is an endoscope treatment tool will be described with reference to FIGS. FIG. 25 is an explanatory diagram when the forceps component is inserted into the endoscope, and FIGS. 26 and 27 are perspective views of two types of forceps components.
[0005]
  In FIG. 25, the forceps component 101 can be inserted into the body through the forceps channel 103 of the endoscope. Since the forceps component 101 needs to be inserted through the forceps channel 103 of the endoscope, the forceps component 101 is formed in a small size having a diameter of 1.8 to 4.5 mm and a length of 6 mm or less.
[0006]
  In FIG. 26, the forceps component 101 is generally composed of a cup-shaped cup portion 104 and an arm portion 105 extending from the rear end side of the cup portion 104. Here, as shown in FIG. 26, a forceps component in which saw-tooth teeth 106 are formed on the outer peripheral edge that becomes the upper surface of the cup portion 104 is referred to as a “V-shaped alligator cup”, and as shown in FIG. A forceps component in which a flat surface 107 is formed on the outer peripheral edge serving as the upper surface of 104 is referred to as a “standard cup”.
[0007]
  A sampling hole 104a is formed in the center of the cup portion 104 so that a larger amount of the specimen can be collected. In addition, a needle-like member to be used as a biopsy forceps such as a forceps with a needle is attached to a part on the rear end side of the outer peripheral edge which is the upper surface of the cup portion 104 in a direction in which the arm portion 105 extends. A groove 108 is provided.
[0008]
  On the other hand, a through-hole 105 a for inserting the above-mentioned support shaft that becomes a fulcrum when the forceps component 101 is opened and closed is formed in the central portion of the arm portion 105. Further, at the base end portion (the end portion away from the cup portion 104) of the arm portion 105, in order to open and close the forceps component 101 with the support shaft as a fulcrum, it rotates with a substantially pantograph-type link mechanism portion (not shown). A connecting hole 105b for freely connecting is formed. In addition, a swelled portion 105 c that is higher than other portions of the arm portion 105 is provided around the connection hole 105 b.
[0009]
  The link mechanism is connected to an operation wire (not shown) inserted through the coil sheath 108. The operation wire is disposed in the coil sheath 108 so as to be movable relative to the coil sheath 108 along the axial direction, and a base end portion thereof is coupled to the operation handle 110 together with the coil sheath 108.
[0010]
  The operation handle 110 includes a fixed portion 110b that fixes the operation wire, and a movable portion 110a that fixes the coil sheath 108 and moves along the axial direction in a direction approaching or moving away from the fixed portion 110b. Yes. When the biopsy forceps are operated, the operation wire and the coil sheath 108 are relatively moved by the relative movement of the fixed portion 110b and the movable portion 110a of the operation handle 110, and the opening and closing of the cup portion 104 of the forceps component 101 is remotely operated. It has become so.
[0011]
  As a method of manufacturing such a forceps component, there is a method disclosed in US Pat. No. 5,133,727. This technique is performed by so-called casting in which a molten metal material is prepared and press-fitted into a separable mold cut into the shape of a forceps component. Then, after molding, the mold is cooled and divided, and the molded forceps component is taken out from the mold.
[0012]
[Problems to be solved by the invention]
  In general, there are two types of forceps components: a reuse type in which a sample of an affected part is collected and then washed, and a disposable type in which the sample is discarded without washing. In particular, disposable type forceps parts have a huge production volume because they are disposable.
[0013]
  However, in the above conventional manufacturing method, since the metal material is melted and molded and then cooled, the cycle time is very long, not only the productivity is not excellent, but also the cost is high.
[0014]
  Further, the forceps parts manufactured by the above-described conventional manufacturing method have poor surface roughness due to casting, and because the mold has a dividing mechanism, a joint of a projection called a parting line is generated in the cup portion. End up.
[0015]
  As described above, the forceps component manufactured by the conventional manufacturing method has a problem that the surface roughness is poor and there is a parting line, so that the forceps component cannot be moved smoothly when passing through the forceps channel of the endoscope. Arise.
[0016]
  The present invention has been made in view of the above-described problems, and improves the surface roughness of the outer periphery of the forceps component and improves the productivity and greatly reduces the cost.GoodsThe purpose is to provide a manufacturing method.
[0017]
[Means for Solving the Problems]
  To achieve the above object, the forceps component according to the first inventionThe manufacturing method is a method for manufacturing a forceps component having a semi-elliptical spherical shell-shaped cup portion and an arm portion that extends from the cup portion and has a through hole in the center, and is made of multistage metal or alloy plates. Pass through the mold crank press etc., first remove the parts other than the cup part preparation part and arm part preparation part by press punching process, then adjust the thickness by press crushing process, A through hole is formed in the center of the arm part preparation part by press drilling, and then the arm part is formed. Subsequently, the cup part preparation part and the arm part are bent by 90 ° along a bending straight line perpendicular to the plate passing direction. After that, the cup-prepared portion is pressed with a two-part mold to form a semi-elliptical spherical shell with a flange around it, followed by press shearing and removing to shear and remove the flange And cup To form.
[0018]
  That is, the forceps component according to the first inventionIn this manufacturing method, a flange is formed around the cup portion preparation portion, and the flange portion is sheared and removed, so that a forceps component with good sharpness can be obtained.
[0019]
  Forceps component according to the second inventionIn the method for manufacturing a forceps component according to the first invention, the metal or alloy plate is iron or an iron-based alloy.
[0020]
  Furthermore, the manufacturing method of the forceps component according to the third invention comprises:In a method of manufacturing a forceps component having a cup-shaped cup portion and an arm portion extending from the cup portion, a band-shaped workpiece is formed between a pair of press punching dies, between a pair of crushing dies, between a pair of folding dies, and a pair of bending dies. When sequentially feeding between the drawing dies, the press punching die is used to prepare a cup part preparation part for forming the cup part, an arm part preparation part for forming the arm part, an arm part preparation part, and a workpiece. A step of pressing and punching the periphery of the bridge portion while leaving the connected bridge portion, and a step of pressing at least the arm portion preparation portion with the crushing die to a desired thickness by moving at least one of the crushing dies. The step of bending the bridge portion by 90 ° with the bending mold, and moving at least one of the drawing molds, The serial cup portion preparing portions pressed, and a step of forming the cup portion performs the plurality of processes simultaneously.
[0021]
  A method of manufacturing a forceps component according to the fourth invention is as follows:In the method for manufacturing a forceps component according to the third invention, In the step of forming the cup portion, a flange is formed on the outer peripheral edge of the cup portion preparation portion, and the flange is further sheared and removed.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
  FIG. 1 shows an overall view including a press machine for manufacturing a forceps component according to an embodiment of the present invention. A perspective view of a mold set in the press machine is shown in FIG. 2, and an explanatory view of a main part of the mold is shown in FIG.
[0023]
  In FIG. 1, a workpiece (workpiece) 2 of SPCE (cold rolled steel: Hv = 100) as a metal material is a strip-shaped plate material and is wound around an uncoiler 3 standing on a base 9. ing. The uncoiler 3 holds a workpiece 2 wound in a roll shape on a rotating shaft, and rotates the rotating shaft to feed the workpiece 2 toward the press 1.
[0024]
  A feeding device 5 is attached to the side surface of the press machine 1. The feeding device 5 moves the workpiece 2 from the uncoiler 3 in the longitudinal direction to the opposed region of the upper die (punch holder) 7 and the lower die (die holder) 8 that are set in the press 1. Send along. The upper die 7 and the lower die 8 constitute a progressive die 6.
[0025]
  The workpiece 2 is supported by a lifter guide (not shown) provided on the lower die 8 between the upper die 7 and the lower die 8, and moves and presses in accordance with the movement of the upper die 7. It is located at the height position when sending and the height position when sending.
[0026]
  Further, between the uncoiler 3 and the feeding device 5, a leveler 4 for correcting the work 2 wound in a roll shape into a flat surface is erected on the base 9. A base 10 of the press machine 1 is fixed to the base 9. A plurality of posts 11 are erected on the base 10 and a bolster 12 on which the lower mold 8 is placed is fixed. The upper mold 7 is fixed to the ram 14 via a clamp 13 or the like, and moves in the vertical direction in accordance with the vertical movement of the ram 14.
[0027]
  Next, the progressive die 6 composed of the upper die 7 and the lower die 8 will be described with reference to FIGS.
[0028]
  The upper die 7 has a long rectangular shape, and its upper surface 7a is fixed to the ram 14 via a clamp 13 or the like. By moving the ram 14 up and down by a crank (not shown) of the press machine 1, It moves vertically along the four guide posts 15 erected on the upper surface of the lower die 8. A punch plate 16 is fixed to the lower surface of the upper mold 7, and a plurality of punches for several steps necessary for manufacturing a forceps part from the workpiece 2 corrected to a flat surface are mounted on the punch plate 16. .
[0029]
  On the other hand, a die plate 17 is fixed to the upper surface of the lower mold 8, and a plurality of dies are mounted on the die plate 17 so as to face a plurality of punches mounted on the punch plate 16.
[0030]
  With the punch and die mounted on the punch plate 16 and the die plate 17, respectively, the belt-like workpiece 2 sequentially fed from the left side in FIG. 3 is obtained by, for example, main processing steps from the first step to the twelfth step. A forceps part can be obtained.
[0031]
  Next, a plurality of punches and dies mounted on each of the punch plate 16 and the die plate 17 and a manufacturing process will be schematically described with reference to the drawings. In FIG. 3, each punch and each die are schematically illustrated, and the front end machining surface of each machining is performed with the following drawings and descriptions.
[0032]
  FIG. 4 shows a perspective view of a punching punch in the first step for roughing the shape in order to obtain a forceps component of a desired shape from a strip-shaped workpiece, and FIG. 5 shows a perspective view of the punched workpiece (FIG. 5). 5, the upper side of the paper corresponds to the upstream side of the workpiece). And the perspective view of the crushing punch and crushing die of the 2nd process which makes constant the thickness (plate thickness) of the roughened work in each part is shown in FIG. 6, and sectional drawing at the time of crushing processing is shown in FIG. FIG. 8 shows a perspective view of the workpiece that is shown and crushed by the punch and die.
[0038]
  FIG. 9 shows a perspective view of the arm base end punching punch in the fourth step in which a connecting hole for opening / closing operation is provided in the arm base end portion of the forceps component, and FIG. 9 shows the fifth step of changing the direction of the crushed workpiece. FIG. 10 shows a perspective view of the bending punch, and FIG. 11 shows a perspective view of the bent workpiece.
[0033]
  Further, FIG. 12 shows a perspective view of the drawing punch and drawing die of the sixth step for forming the cup shape on the bent workpiece, and FIG. 13 shows a sectional view when drawing with the punch and die. FIG. 14 shows a perspective view of the drawn and drawn workpiece.
[0034]
  FIG. 15 is a perspective view of the toothing punch and the toothing die in the seventh step for toothing the drawn cup-shaped workpiece, and FIG. 15 is a cross-sectional view when toothing is performed with this punch and die. As shown in FIG. FIG. 16 is a perspective view of the toothing punch when manufacturing the “standard cup”.
[0035]
  Further, FIG. 18 shows a perspective view of a shear punch and a shear die in the eighth step of removing the flange formed around the cup portion shape with respect to the toothed work, and shearing is performed with this punch and die. FIG. 19 shows a cross-sectional view at that time, and FIG. 20 shows a perspective view of the sheared workpiece.
[0036]
  FIG. 21 shows a perspective view of the cup punching punch in the ninth step in which a sampling hole is provided in the central portion of the cup portion of the forceps component, and the bending back in the tenth step for returning the workpiece orientation changed as described above. A perspective view of the die is shown in FIG.
[0037]
  FIG. 23 shows a perspective view of an arm center portion punching punch in the eleventh step in which a through hole is provided in the center portion of the arm portion of the forceps component. A perspective view of the punch is shown in FIG.
[0038]
  Hereinafter, each punch and die in each process used in the manufacturing process of the forceps component will be described in detail.
[0039]
  In FIG. 4, in order to obtain a forceps component from the strip-shaped workpiece 2, the punching punch 18 used in the first step is subjected to the roughing of the shape corresponding to the shape of the cup portion preparing portion 2b and the arm portion preparing portion. 2a and a bridge portion 2c (see FIG. 5) for connecting the arm portion preparing portion 2a and the strip-shaped workpiece 2 to leave a predetermined portion so as to punch out the periphery, and has a substantially L-shaped space 18a. ing. Further, the punching die 19 has a hole formed at a position facing the protruding portion of the punching punch 18, and the chip punched from the strip-shaped workpiece 2 is discharged through the hole.
[0040]
  In FIG. 6, in order to make the thickness (plate thickness) of the arm part preparation part 2a and the cup part preparation part 2b formed on the belt-like work 2 via the bridge part 2c constant in each part, The crushing punch 20 to be used includes an arm crushing surface (reference surface) 20a that crushes the upper surface of the arm portion preparing portion 2a, a cup crushing surface 20b that crushes the upper surface of the cup portion preparing portion 2b that is recessed from the reference surface 20a, In order to form the swelled portion 2d (see FIGS. 7 and 8) in the vicinity of the base end portion of the portion preparing portion 2a, a recess 20c that is partially recessed from the reference surface 20a is provided.
[0041]
  The crushing die 21 has an arm crushing surface (reference surface) 21a that crushes the lower surface of the arm portion preparing portion 2a and a cup crushing surface 21b that crushes the lower surface of the cup portion preparing portion 2b that is recessed from the reference surface 21a. Have.
[0042]
  In the arm portion preparation portion 2a and the cup portion preparation portion 2b that have been crushed in the second step, dank (waste meat) is formed with respect to the shape before the crushed processing (see FIG. 5). In the process, a removal punch 22 and a removal die 23 for removing the flesh are mounted.
[0043]
  That is, the removal punch 22 is for removing the flesh that has been crushed by the crushing punch 20 and the crushing die 21, and has the same shape as the punching punch 18. The removal die 23 has the same shape as the punching die 19.
[0044]
  In FIG. 9, in order to provide the connecting hole in the arm base end, the arm base end punching punch 24 used in the fourth step is formed on the raised portion 2d formed in the vicinity of the base end of the arm preparation portion 2a. The tip protrudes so as to open a hole (connection hole 105b shown in FIG. 26). The arm base end punching die 25 has a hole (not shown) formed at a position facing the protruding portion of the punching punch 24.
[0045]
  In FIG. 10, after drilling is performed, the direction of the work 2 is changed, that is, the arm part preparing part 2 a and the cup part preparing part 2 b are directed in a direction perpendicular to the progressive feeding direction of the strip-shaped work 2. The bending punch 26 used in the fifth step has a convex shape for bending the bridge portion 2c close to the arm portion preparation portion 2a by 90 ° downward. On the other hand, the bending die 27 has a convex shape so as to support the vicinity of the bridge portion 2c that is not used for bending from below.
[0046]
  In FIG. 12, the drawing punch 28 used in the sixth step to form the cup part shape on the bent work 2 has a molding surface 28a having a concave surface on the inner surface (upper surface) of the cup part preparation portion 2b. In order to form, it has a convex R shape (so-called cup shape or semi-elliptical spherical shell shape: Rmax = 0.05S to 0.4S).
[0047]
  Further, the drawing punch 28 protrudes from a part of the reference surface 28c in order to form a groove in the same direction as the longitudinal direction of the arm part preparing part 2a in a part of the outer peripheral edge of the upper surface of the cup part preparing part 2b. The protruding portion 28b is formed. On the other hand, the drawing die 29 has a concave R shape in which the molding surface 29a is obtained by inverting the outer peripheral surface (lower surface) of the cup portion preparing portion 2b, and is a mirror surface by lapping (Rmax = 0.05S to 0.4S). Finished. The aperture die 29 is formed with a hole 29b at a portion facing the protrusion 28b so that the protrusion 28b can be accommodated.
[0048]
  In FIG. 15, the toothing punch 30 used in the seventh step for toothing the drawn workpiece 2 includes a flat surface 30b that strikes the upper surface of the flange 2e formed on the cup portion preparation portion 2b, and a cup portion preparation. A triangular protrusion 30a that attaches a plurality of teeth (teeth 106 shown in FIG. 26) to the outer peripheral edge of the portion 2b. On the other hand, the toothing die 31 has a concave R shape in which the molding surface 31a is obtained by inverting the outer peripheral surface (lower surface) of the cup portion preparation portion 2b, and a mirror surface (Rmax = 0.05S to 0.4S) by lapping. ) Finished.
[0049]
  When the “standard cup” is manufactured, a drawing punch 32 without the triangular protrusion 30a as shown in FIG. 16 is used, and the upper surface of the flange 2e formed on the cup portion preparation portion 2b is hit with the flat surface 32a. Just good.
[0050]
  In FIG. 18, in order to remove the flange 2e formed around the cup portion shape with respect to the toothed workpiece 2, the shear punch 33 used in the eighth step is a drawing punch 28 having a convex tip (see FIG. 18). 12), and has a convex R shape (so-called cup shape or semi-elliptical spherical shell shape), and is slidable in the cylindrical wrinkle pressing member 35 in the vertical direction. The wrinkle pressing member 35 is configured to press the upper surface of the flange 2e formed on the outer peripheral edge of the cup portion preparing portion 2b of the workpiece 2 at the flat portion at the tip thereof. On the other hand, the shear die 34 is formed with a hole 34a so that the lower surface of the flange 2e can be locked to the flat portion of the upper surface.
[0051]
  In FIG. 21, in order to provide a sampling hole in the center part of the cup part 2f formed from the cup part preparation part 2b, the cup part punching punch 36 used in the ninth step is a hole (see FIG. The tip protrudes so as to open a sampling hole shown in FIG. On the other hand, the cup part punching die 37 has a hole formed at a position facing the protruding part of the punching punch 36.
[0052]
  In FIG. 22, in order to return the orientation of the work 2 bent 90 ° in the fifth step, that is, to make the arm portion preparing portion 2a parallel to the progressive direction of the strip-shaped work 2, the tenth step The bending return die 39 used in the above has a convex shape with the tip inclined so as to bend the bridge portion 2c upward by 90 °. On the other hand, the bending return punch 38 has a convex shape so as to support the vicinity of the bridge portion 2c bent back from the lower side.
[0053]
  In FIG. 23, in order to provide a through-hole in the center part of the cup part 2f of the bent work 2, the arm center part punching punch 40 used in the eleventh step has a hole ( The tip protrudes so as to open the through hole shown in FIG. On the other hand, the arm center part punching die 41 has a hole formed at a position facing the protruding part of the punching punch 40.
[0054]
  In FIG. 24, the cutting punch 42 used in the twelfth step for cutting the workpiece that has undergone the manufacturing process from the band-shaped workpiece 2 is cut in order to cut the base end portion of the arm portion preparing portion 2a into a curved surface having a predetermined shape. The tip is thin and bent into a predetermined shape. On the other hand, the separation die 43 has a shape that supports the vicinity of the separation portion from below and accommodates the tip portion of the separation punch 42.
[0055]
  The punching punch 18 and punching die 19 used in the first step constitute a pair of press punching dies, and the crushing punch 20 and crushing die 21 used in the second step constitute a pair of crushing dies. The bending punch 26 and the bending die 27 used in the fifth step constitute a pair of bending dies, and the drawing punch 28 and the drawing die 29 used in the sixth step constitute a pair of drawing dies (semi-sealed two-part mold). is doing.
[0056]
  Next, a method for producing a “V-shaped alligator cup” using the press machine 1 will be described.
[0057]
  First, as shown in FIG. 1, the progressive die 6 is set in the press 1, the upper die 7 is fixed to the ram 14 via the clamp 13, and the lower die 8 is fixed to the voiceter 12.
[0058]
  Next, the rotating shaft of the uncoiler 3 is rotated, and the strip-shaped workpiece 2 wound in a roll shape is sent out toward the press machine 1. The workpiece 2 is corrected to a flat surface through the leveler 4.
[0059]
  When the feeding device 5 is operated, the belt-like workpiece 2 that has been corrected to a flat surface is opposed to the punching punch 18 and the punching die 19 in the first step, and is opposed to the pressing punch 20 and the pressing die 21 in the second step. A region, a region opposite to the removal punch 22 and the removal die 23 in the third step, a region opposite to the arm base end punching punch 24 and the punching die 25 in the fourth step, and a bending punch 26 in the fifth step. And the facing area of the bending die 27, the facing area of the drawing punch 28 and the drawing die 29 in the sixth process, the facing area of the toothing punch 30 and the toothing die 31 in the seventh process, and the shear punch 33 in the eighth process. Region facing the shearing die 34, region facing the cup punching hole 36 and the hole punching die 37 in the ninth step, region facing the bending punch 38 and the bending die 39 in the tenth step, step 11 Center of arm A predetermined distance (constant pitch) is intermittently provided to the facing region between the punching punch 40 and the punching die 41 and the facing region between the separation punch 42 and the separation die 43 in the twelfth step (in this embodiment, every 0.6 seconds). ) Sent out.
[0060]
  By the operation of the feeding device 5 in which the forceps component of the “V-shaped alligator cup” is manufactured, the ram 14 moves downward in synchronization with the belt-like workpiece 2 being intermittently fed out at a predetermined distance. The upper mold 7 descends along the guide post 15. Thereby, a plurality of processes are simultaneously performed by the plurality of punches and the plurality of dies of the progressive die 6.
[0061]
  A plurality of processing steps (the first step to the twelfth step) are performed when the work 2 is stopped, and then the workpiece 2 is separated by a predetermined distance (for example, a distance between a point for punching and a point for crushing). ) Stop after sending out. A plurality of processes are continuously performed by repeating this operation.
[0062]
  Hereinafter, the plurality of processing steps will be specifically described.
[0063]
  In the punching process as the first step, the belt-like workpiece 2 is punched with a convex punching punch 18 and a punching die 19 shown in FIG. Thereby, as shown in FIG. 5, the work 2 leaves a cup part preparation part 2 b, an arm part preparation part 2 a, and a bridge part 2 c for connecting the arm part preparation part 2 a and the strip-shaped work 2. The surrounding area becomes space.
[0064]
  The crushing process as the second step is a crushing punch 20 shown in FIG. 6 in which the workpiece 2 formed from a part of the cup part preparation part 2b, the arm part preparation part 2a and the bridge part 2c remaining after the punching process is shown. Crush with crushing die 21.
[0065]
  At this time, as shown in FIG. 7, in the workpiece 2, the arm part preparation part 2a is formed by the arm part crushing surfaces 20a and 21a, and the cup part preparation part 2b is formed by the cup part crushing surfaces 20b and 21b. Further, a swelled portion 2d is formed by a recess 20c of the crushing punch 20 in a part of the arm portion preparing portion 2b. Accordingly, as shown in FIG. 8, the workpiece 2 is provided with steps having different heights in the cup portion preparing portion 2b, the arm portion preparing portion 2a, and the raised portion 2d, and a desired thickness (plate thickness). It becomes.
[0066]
  The removal process that is the third step is the first step for removing the meat (not shown in FIG. 8) that protrudes outside the cup part preparation part 2b and the arm part preparation part 2a in the crushing process of the second process. Punching is performed with a removal punch 22 and a removal die 23 configured in the same shape as the punch and die used in the process.
[0067]
  In the arm base end portion punching process which is the fourth step, a hole is provided in the raised portion 2d of the arm portion preparation portion 2a by the arm base end portion punching punch 24 shown in FIG.
[0068]
  The bending process as the fifth step is performed by using the bending punch 26 and the bending die 27 shown in FIG. 10 for the punched work 2 and the bridge part 2c in the vicinity of the arm preparation part 2a as a fulcrum as shown in FIG. Bend 90 ° downward. Thereby, the surface of the cup part preparation portion 2b to be drawn for forming the cup part shape in the subsequent process (sixth process) faces the upper mold 7 and the lower mold 8.
[0069]
  In the drawing process, which is the sixth step, the cup portion preparation portion 2b of the workpiece 2 that has been bent is press-formed by the drawing punch 28 and the drawing die 29 shown in FIG. As a result, the workpiece 2 is molded into a convex mirror surface while the outer peripheral surface (lower surface) of the cup portion preparation portion 2b flows along the molding surfaces 28a and 29a, and the work piece 2 has one outer peripheral edge of the cup portion preparation portion 2b. A groove (not shown) is formed in the part.
[0070]
  At this time, as shown in FIGS. 13 and 14, the outer peripheral edge of the upper surface of the cup portion preparation portion 2 b is sandwiched between the flat portion 28 c of the drawing punch 28 and the flat portion 29 c of the drawing die 29, A flange 2e extending radially is formed. The flange 2e is formed a little larger in advance so that it can be easily removed by shearing in a subsequent shearing process.
[0071]
  The toothing process that is the seventh step is to add V-shaped teeth to the outer peripheral edge of the upper surface of the cup-prepared portion 2b that has been drawn with the toothing punch 30 and the toothing die 31 shown in FIG. The upper surface of the flange 2e is completely flat.
[0072]
  Note that when the “standard cup” is manufactured, the toothing process is not performed, and the upper surface of the flange 2e is made completely flat by the flat surface 32a of the punch 32 shown in FIG.
[0073]
  In the shearing process, which is the eighth step, the flange 2e of the cup portion preparation portion 2b is sheared by the shearing punch 33 and the shearing die 34 shown in FIG. Specifically, as shown in FIG. 19A, the lower surface of the flange 2e of the cup portion preparing portion 2b is placed and supported on the shearing die 34, and the upper surface of the flange 2e is disposed on the outer periphery of the shearing punch 33. The bottom surface of the cylindrical wrinkle pressing member 35 is pressed. And as shown in FIG.19 (b), by lowering | hanging the shear punch 33, the flange 2e of the cup part preparation part 2b is sheared and punched, and it is set as the cup part 2f.
[0074]
  In the cup part drilling process, which is the tenth step, a hole is provided in the approximate center of the cup part 2f by the cup part punching punch 36 shown in FIG.
[0075]
  In the eleventh step, the unbending process is performed by bending the punched work 2 upward 90 ° with the bending die 39 and the bending punch 38 shown in FIG. 22 and using the bridge portion 2c in the vicinity of the arm portion preparation portion 2a as a fulcrum. . As a result, the drawn surface of the cup portion 2f faces sideways (horizontal).
[0076]
  In the arm center portion drilling process, which is the twelfth step, a hole is provided in the center of the arm portion preparation portion 2a by the arm center portion punching punch 40 shown in FIG.
[0077]
  In the cutting process, the punched workpiece 2 is cut into a predetermined shape from the bridge portion 2c by the cutting punch 42 shown in FIG. 24, and the press machine 1 is used as a forceps component of the “V-shaped alligator cup” shown in FIG. It is discharged into a collection box (not shown) provided inside.
[0078]
  In addition, although the chamfering is given to the opening end of the connection hole 105b and the through-hole 105a shown in FIG. 26, this chamfering forms a step part with respect to the pin at the time of forming each hole, and this step part is armed. It can be formed by contacting the part.
[0079]
  The order of the plurality of processing steps performed in the present embodiment is not limited to this. For example, the arm center portion drilling process that is the twelfth step is performed at the time of the arm base end hole drilling process that is the fourth step. If the workpiece can be machined, it can be changed into various combinations.
[0080]
  In addition, each processing step is not limited to one time, and one step may be gradually progressed in several times. For example, the punching process in the first step is performed in a plurality of times, the fifth step, The bending process in the tenth step may be performed gradually.
[0081]
  In the present embodiment, SPCE is used as a workpiece. However, the present invention is not limited to this, and a metal or alloy such as iron-based material, stainless steel, aluminum, or copper-based material may be used.
[0082]
  In the present embodiment, the forceps component is manufactured by pressing the strip-shaped plate material with the upper die and the lower die. However, the present invention is not limited to this, and a stripper plate is provided between the upper die and the lower die. After the workpiece is pressed to the lower mold side and fixed by the stripper plate, the upper mold may be moved downward through a hole provided in the stripper plate and pressed.
[0083]
  Furthermore, in the present embodiment, a strip-shaped plate material is used as the workpiece. However, the present invention is not limited to this. For example, a plurality of rectangular plate materials may be used, and a plurality of plate materials may be arranged in a line and sequentially fed.
[0084]
  According to the present embodiment, since a forceps component is manufactured by a press machine having a high productivity using a progressive die having an upper mold and a lower mold, it is possible to produce with a cycle time of 0.6 seconds. It was.
[0085]
  Further, by shearing the flange, an edge is formed in the portion punched out of the flange, and the affected specimen can be excised with good sharpness.
[0086]
  Furthermore, since the material is work-hardened (Hv = 160 to 200) by performing plastic working such as crushing and drawing on the band-shaped workpiece, a forceps component having the same thickness as the forceps component by casting is used. When manufactured, the strength of the forceps component can be improved.
[0087]
Since the cup portion of the forceps component has at least an outer peripheral surface as a mirror surface by drawing, the insertion into the forceps channel of the endoscope can be smoothly performed.
[0088]
  In addition, since the flange is easily generated by the wrinkle pressing member by generating the flange on the outer periphery of the upper surface of the cup portion in advance, it is possible to punch out the flange of a small forceps component.
[0089]
  Further, the technical idea of the following configuration is derived from the specific embodiment described above.
[0090]
  (1) In a forceps component having a cup-shaped cup portion and an arm portion extending from the cup portion,
  The cup part includes a blade part obtained by press-working a strip-shaped plate material and press-shearing and removing a flange formed on the periphery thereof.
[0091]
  According to the forceps component of (1) above, since the flange formed on the outer peripheral edge of the cup portion is sheared and removed, an edge is formed on the outer peripheral edge of the cup portion, and the specimen can be excised with good sharpness.
[0092]
  (2) In a method of manufacturing a forceps component having a cup-shaped cup portion and an arm portion extending from the cup portion,
  When the belt-like workpiece is sequentially fed between a pair of press punching dies, between a pair of crushing dies, between a pair of folding dies, and between a pair of drawing dies,
  A cup portion for forming the cup portion from the work manufacturing area by moving at least one of the pair of press punching dies when the work manufacturing area is positioned between the pair of press punching dies. Leaving the preparation part, the arm part preparation part for forming the arm part and the bridge part for connecting the arm part preparation part and the belt-like work, and removing the periphery thereof by press punching;
  By moving at least one of the crushing molds, pressing the cup part preparing part and the arm part preparing part with the crushing mold to a desired thickness;
  A step of bending the bridge portion by 90 ° with the bending mold so that the direction of the cup portion preparation portion and the arm portion preparation portion is orthogonal to the surface of the band-shaped workpiece;
  By pressing at least one of the drawing molds, pressing the cup part preparation portion with the drawing molds, and molding the cup part;
Have
  A method of manufacturing a forceps component, wherein the plurality of steps are simultaneously performed on a manufacturing area of the workpiece to be sequentially fed.
[0093]
  According to the forceps component manufacturing method of (2) above, the forceps components can be manufactured with high work efficiency, and the cost can be greatly reduced.
[0094]
【The invention's effect】
  Claim 1According to claim 2 and claim 3Forceps component of the present inventionAccording to this manufacturing method, the forceps component can be manufactured with high work efficiency, and the cost can be greatly reduced.
[0095]
  Also,According to the method for manufacturing a cup part of the present invention according to claim 4, in addition to the effect of claim 3, the flange formed on the outer peripheral edge of the forceps part is sheared and removed, so that a good lever part can be obtained.
[Brief description of the drawings]
FIG. 1 is an overall view including a press machine for manufacturing forceps parts in the present embodiment.
FIG. 2 is a perspective view of a mold set in a press in the present embodiment.
FIG. 3 is an explanatory diagram of a main part of a mold in the present embodiment.
FIG. 4 is a perspective view of a punching punch in the present embodiment.
FIG. 5 is a perspective view of a punched workpiece.
FIG. 6 is a perspective view of a crushing punch and a crushing die in the present embodiment.
FIG. 7 is a cross-sectional view of a crushing punch and a crushing die in the present embodiment.
FIG. 8 is a perspective view of a crushed workpiece.
FIG. 9 is a perspective view of an arm base end punching punch in the present embodiment.
FIG. 10 is a perspective view of a bending punch in the present embodiment.
FIG. 11 is a perspective view of a bent workpiece.
FIG. 12 is a perspective view of a drawing punch and a drawing die in the present embodiment.
FIG. 13 is a sectional view of a drawing punch and a drawing die in the present embodiment.
FIG. 14 is a perspective view of a drawn workpiece.
FIG. 15 is a perspective view of a toothing punch and a toothing die in the present embodiment.
FIG. 16 is a perspective view of another toothing punch in the present embodiment.
FIG. 17 is a cross-sectional view of a toothing punch and a toothing die in the present embodiment.
FIG. 18 is a perspective view of a shear punch and a shear die in the present embodiment.
FIG. 19 is a cross-sectional view of a shear punch and a shear die in the present embodiment.
FIG. 20 is a perspective view of a sheared workpiece.
FIG. 21 is a perspective view of a cup portion punch for punching in the present embodiment.
FIG. 22 is a perspective view of a bending return die in the present embodiment.
FIG. 23 is a perspective view of an arm center portion punch in this embodiment.
FIG. 24 is a perspective view of a separation punch in the present embodiment.
FIG. 25 is a perspective view when the forceps part is inserted into the endoscope.
FIG. 26 is a perspective view of a forceps component.
FIG. 27 is a perspective view of another forceps component.
[Explanation of symbols]
1 Press machine
2 Work
2a Arm part preparation part
2b Cup part preparation part
2e Flange

Claims (4)

A forceps component manufacturing method having a semi-elliptical spherical shell-shaped cup portion and an arm portion extending from the cup portion and having a through hole in the center,
A metal or alloy plate is passed through a crank press or the like of a multi-stage die, and first the parts other than the cup part preparation part and the arm part preparation part are removed by press punching, and then the thickness is obtained by press crushing. Next, press the punching process to drill the through hole in the center of the arm part preparation part to form the arm part, and then bend 90 ° along the bending straight line perpendicular to the plate passing direction to prepare the cup part Make the part and arm stand upright with respect to the plate surface, and then press the cup preparation part with a two-part mold to form a semi-elliptical spherical shell with a flange around it, followed by press shearing and removal To shear and remove the flange to form a cup part,
A method for manufacturing a forceps component. The forceps component manufacturing method according to claim 1, wherein the metal or alloy plate is iron or an iron-based alloy. In a method of manufacturing a forceps component having a cup-shaped cup portion and an arm portion extending from the cup portion,
When feeding a belt-like workpiece in sequence between a pair of press punching dies, between a pair of crushing dies, between a pair of bending dies, and between a pair of drawing dies,
With the press punching die, the cup part preparation part for forming the cup part, the arm part preparation part for forming the arm part, and the bridge part connecting the arm part preparation part and the work are left around the periphery. Pressing and punching at least one of the crushing molds to move at least the arm part preparation portion to a desired thickness by moving at least one of the crushing molds,
A step of bending the bridge portion by 90 ° with the bending die, a step of pressing the cup portion preparation portion with the drawing die by moving at least one of the drawing die, and forming the cup portion;
Have
A method of manufacturing a forceps component, wherein the plurality of steps are performed simultaneously . The method for manufacturing a forceps component according to claim 3, further comprising a step of forming a flange on an outer peripheral edge of the cup portion preparation portion in the step of forming the cup portion, and shearing and removing the flange .

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