JP5898411B2 - Insert color molding method - Google Patents

Description

  The present invention relates to a method for molding a metal insert collar provided by insert molding around a bolt insertion hole of a resin member.

  In order to prevent the resin at the periphery of the bolt insertion hole from being damaged by the tightening torque of the bolt, a metal insert collar is provided by insert molding around the bolt insertion hole of the resin member. A recess is formed on the outer peripheral surface of the insert collar in order to enhance the bonding force with the resin.

  The present invention relates to a method for forming such an insert collar.

  The conventional forming method of such an insert collar is formed by bending a strip-shaped metal plate into a circle.

  However, in the case of such a conventional method, there is a possibility that the resin enters the butt joint portion at both ends when insert molding is performed. For this reason, the butt joints at both ends must be connected by welding or the like, which takes extra time. When completed, the roundness was low, and the flatness of the top and bottom was also poor.

  The present invention has been made in view of the above points, and the finished product has no joints and joints, and can obtain an insert color having high roundness and good flatness in the upper and lower sides. It is an object of the present invention to provide a method for forming an insert collar which can perform all the processing in a series of continuous steps and can greatly improve the molding efficiency.

Thus, the gist of the present invention is that a long metal plate is fed into a progressive die one pitch at a time, each metal plate is individually processed at each stage, and the metal is sequentially transferred to the next stage. It is a method of forming an insert collar using a progressive die that sends a plate to add processing and completes processing at the final stage,
The stage in the progressive die is along the feed direction of the metal plate,
A pilot hole drilling stage (A) for drilling pilot holes at predetermined intervals on the left and right sides in the feed direction of the metal plate;
An outer shape cutting stage (B) for cutting a circular shaped processed portion of the metal plate leaving a part of the connecting portion;
A drawing stage (C) for gradually increasing the drawing depth of the molded product to be formed into a cylindrical shape,
A crushing stage (D) for forming a sag at each corner of the squeezed molded product into an edge;
A hole punching stage (E) for punching holes in the narrowed molded product;
A dimple processing stage (F) for forming a depression in the outer peripheral surface of the molded product after punching;
A shaving processing stage (G) for finishing the inner diameter of the molded product;
Out径再molding stage to finish the inner diameter and the outer diameter of the molded article into a predetermined size and (H),
Pinch trim product discharge stage (I) that cuts the throttle flange of the molded product and discharges the finished molded product
And
The progressive die is composed of an upper die and a lower die that are opened and closed by an appropriate drive mechanism, and the lower die is for at least pilot hole drilling and a plurality of outer shape punching processes along the feed direction of the metal plate. Dies, a plurality of drawing dies for drawing a plurality of times, a die for crushing with a lower punch, a die for punching holes, and a dimple forming unit that pressurizes the outer peripheral surface of the molded product from the outside. A pressure device, a shaving die, an inner / outer diameter re-forming die, and a pinch trim die, and the upper die has a pilot hole punch and a plurality of times at positions corresponding to the dies. Punches for outer shape cutting, multiple drawing punches for drawing multiple times, punches for crushing, punches for punching, pressing pins for pressing the molded product from the top, punches for shaving And inner and outer diameter reconstruction And punch use, in the molding method of the insert collar comprising a punch for pinch trimming.

  According to the present invention, it is possible to obtain an insert collar which has no joints and joints in the finished product, and has high roundness and good vertical flatness. In addition, all processing is performed in a series of continuous steps, and the molding processing efficiency can be greatly improved.

It is a longitudinal cross-sectional view of the state in which the upper mold | type and lower mold | die of the progressive die used in this invention were closed. It is a top view of a lower mold. It is a top view of an upper model. It is a partial top view of the metal plate of the state which finished the process in each stage. FIG. 5 is a partially enlarged view of a portion of the metal plate shown in FIG. 4. It is processing explanatory drawing in each stage. It is the perspective view which notched and showed a part of shaping | molding process part of the metal plate in a drawing process stage and a crushing process stage. It is process explanatory drawing in a crushing process stage. It is sectional drawing of the shaping | molding process part of the metal plate of the state which extracted the hole in the punching stage. It is processing explanatory drawing in the shaving processing stage. It is an enlarged view of A part in FIG. It is processing explanatory drawing in an inner-outer diameter re-forming stage. It is processing explanatory drawing in a pinch trim product discharge stage.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  In the figure, reference numeral 1 denotes a long metal plate as a workpiece, and a material suitable for an insert collar is used. Further, the metal plate 1 is intermittently fed by a feeder (not shown) at a predetermined pitch one by one into a progressive die described later.

  Reference numeral 2 denotes a progressive die. Further, the progressive die 2 performs processing at each stage, which will be described later, on the metal plate 1, adds the processing by sequentially feeding the metal plate 1 to the next stage, and completes the processing at the final stage. is there.

  In the present embodiment, each stage in the progressive die 2 is as follows, and will be described with reference to the plan view of the metal plate 1 shown in FIG.

Each stage is sequentially provided in the following arrangement along the feeding direction of the metal plate 1, and a pilot hole drilling stage (perforating pilot holes P at predetermined intervals on the left and right side portions in the feeding direction of the metal plate 1 ( A), an external punching stage (B) for cutting the circular forming portion 1a of the metal plate 1 leaving a part of the connecting portion 1b, and the drawing depth of the formed product to be formed into a cylindrical shape in order. A deepening stage (C), a crushing stage (D) for forming a sag at each corner of the narrowed molded product at the edge, a punching stage (E) for punching a hole in the narrowed molded product, a dimpled stage of forming a recess in the outer peripheral surface of the molded article after piercing (F), shaving stage to finish the inner diameter of the molded product (G), finishing the inner diameter and the outer diameter of the molded article into a predetermined size Inner / outer diameter re-forming stage (H) and drawing Cut the flange portion 1a ', and is configured with a pinch trim product discharge stage for discharging the finished molded product (I).

  The progressive die 2 is composed of an upper die 4 and a lower die 3 that are opened and closed by an appropriate drive mechanism. The upper die 4 and the lower die 3 are processed in the stages A to I, respectively. A die and punch for performing the above are sequentially provided.

  The lower die 3 includes a die 5 for drilling a pilot hole and a plurality of punching dies (in this embodiment, a die 5a for drilling a pilot hole and a circular forming portion 1a of the metal plate 1). The two cutting dies 5b and 5c having different orientations, which are cut while leaving the connecting portion (bridge) 1b, are integrated with each other. A first drawing die 6, a second drawing die 7, a third drawing die 8, a die 9 for crushing processing provided with a lower punch 9a, and a die for punching holes. 10, a dimple forming and pressing device 11 including a pair of pressing bodies 11 a and 11 b that pressurize the outer peripheral surface of the molded product from the outside to form a recess, a shaving die 12, and an upper end corner. The inner diameter forming punch 13A having a rounded portion and the inner diameter forming pad A die 13 for reshaping the inner and outer diameters, and a die 14 for pinch trim, which are formed between a pusher ring 13B for product release interposed between the punch 13A and the die 13 and biased in the upward direction via a spring. I have. In addition, about the drawing die which performs the said multiple times of drawing process, although the case where three drawing dies were used in this embodiment, it is good also as more.

  The upper die 4 has a pilot hole punching punch 15, punches 16 and 17 for a plurality of outer shape punching, and a molded product to be formed into a cylindrical shape at a position corresponding to each die of the lower die 3. A first drawing punch 18, a second drawing punch 19, a third drawing punch 20, a crushing punch 21, and a hole punching hole, which are subjected to a plurality of drawing operations for increasing the drawing depth in order. A punch 22, a pressing pin 23 that presses the molded product from above, a shaving punch 24, an inner / outer diameter re-forming punch 25, and a pinch trim punch 26 are provided. In addition, the upper die 4 was drawn between the first drawing punch 18 and the second drawing punch 19 and between the third drawing punch 20 and the crushing punch 21. Extrusion pins 27 and 28 are provided to prevent the metal plate from coming out of each punch. In this embodiment, the number of drawing punches to which a plurality of drawing processes are performed is three according to the number of lower drawing dies, but the number is appropriately set according to the number of drawing dies.

  Further, the die and punch in each of the upper die 4 and the lower die 3 are sequentially processed as shown in FIG. FIG. 6 shows processing steps after stage C in FIG. 7A, 7B, and 7C show the form of the molded product 1a that is drawn through the first drawing process to the third drawing process, and FIG. The processing part at the time of performing the crushing process which shape | molds the sagging of each corner | angular part of 1a is shown, and the part shown with an arrow is a processing part. FIG. 8 shows an explanation of the crushing process, in which the molded product 1a is pressed between the die 9 of the lower die 3 and the lower punch 9a and the punch 21 of the upper die 4, and each corner of the molded product 1a. The sag (R) of the part is formed on the edge. The arrow part is the processed part. Also, the portion indicated by S in FIG. 4 is a play portion in which the processing die and punch are not provided in the upper die 4 and the lower die 3, and the pitch interval is narrow and these are provided continuously. It is provided because it cannot be done.

  9 shows the stage E in FIG. 4 and the molded product 1a which has been punched by processing of the symbol E in FIG. 6, and FIGS. 10 and 11 show the stage G in FIG. 4 and the symbol G in FIG. An explanation of the shaving process is shown, in which the molded product 1a is supported by the die 12 of the lower mold 3, and scraped off with a punch 24 having a diameter slightly larger than the hole diameter of the molded product 1a of the upper mold 4.

FIG. 12 shows the process of reshaping the inner and outer diameters of the stage H in FIG. 4 and the symbol H in FIG. 6. In the state where the product release push-up ring 13B in the die 13 of the lower mold 3 is raised, The lower end of the hole of the molded product 1a is placed on the upper end of the inner diameter molding punch 13A, the lower end is placed on the upper end of the product release push ring 13B, and the molded product 1a is pushed down by the punch 25 of the upper die 4. Thus the molded article 1a is compressed by being pushed from above into the gap between the dialog 13 and the inner circumference forming punch 13 A, the outer diameter and its inner diameter is intended to be finished into a predetermined size.

  FIG. 13 shows an explanation of a pinch trim that performs processing of stage I in FIG. 4 and symbol I in FIG. 6, and is pressed by the die 14 of the lower die 3 and the punch 26 of the upper die 4, and the molded product 1a The throttle flange portion 1a 'is cut and the finished molded product is discharged.

Thus, according to the present invention, a long metal plate is fed into a progressive die one pitch at a time, and the metal plate is individually processed at each stage, and the metal plate is sequentially sent to the next stage for processing. Is an insert collar molding method using a progressive die that completes processing at the final stage,
The stage in the progressive die is along the feed direction of the metal plate,
A pilot hole drilling stage (A) for drilling pilot holes at predetermined intervals on the left and right sides in the feed direction of the metal plate;
An outer shape cutting stage (B) for cutting a circular shaped processed portion of the metal plate leaving a part of the connecting portion;
A drawing stage (C) for gradually increasing the drawing depth of the molded product to be formed into a cylindrical shape,
A crushing stage (D) for forming a sag at each corner of the squeezed molded product into an edge;
A hole punching stage (E) for punching holes in the narrowed molded product;
A dimple processing stage (F) for forming a depression in the outer peripheral surface of the molded product after punching;
A shaving processing stage (G) for finishing the inner diameter of the molded product;
Out径再molding stage to finish the inner diameter and the outer diameter of the molded article into a predetermined size and (H),
Pinch trim product discharge stage (I) that cuts the throttle flange of the molded product and discharges the finished molded product
And
The progressive die is composed of an upper die and a lower die that are opened and closed by an appropriate drive mechanism, and the lower die is for at least pilot hole drilling and a plurality of outer shape punching processes along the feed direction of the metal plate. Dies, a plurality of drawing dies for drawing a plurality of times, a die for crushing with a lower punch, a die for punching holes, and a dimple forming unit that pressurizes the outer peripheral surface of the molded product from the outside. A pressure device, a shaving die, an inner / outer diameter re-forming die, and a pinch trim die, and the upper die has a pilot hole punch and a plurality of times at positions corresponding to the dies. Punches for outer shape cutting, multiple drawing punches for drawing multiple times, punches for crushing, punches for punching, pressing pins for pressing the molded product from the top, punches for shaving And inner and outer diameter reconstruction A punch of use, a method of forming the insert collar comprising a punch for pinch trimming.

  According to the present invention, it is possible to obtain an insert collar that has no joints and joints in the finished product, and has high roundness and good vertical flatness. In addition, all processing is performed in a series of continuous steps, and the molding processing efficiency can be greatly improved.

DESCRIPTION OF SYMBOLS 1 Long metal plate 2 Progressive die 3 Lower die 4 Upper die 5 Die for pilot hole drilling and outline punching 6 First drawing die 7 Second drawing die 8 Third drawing die 9 Die for crushing DESCRIPTION OF SYMBOLS 10 Die for punching 11 Dimple formation pressurizing device 12 Die for shaving processing 13 Die for inner / outer diameter reforming 14 Die for pinch trim 15 Pilot hole punching punches 16 and 17 Punch for outer shape punching 18 First drawing Punch 19 Second drawing punch 20 Third drawing punch 21 Punch for crushing 22 Punch for punching 23 Pressing pin 24 Punch for shaving 25 Punch for reshaping inner and outer diameters 26 Punch for pinch trim

Claims (1)

A long metal plate is fed into the progressive die one pitch at a time, the metal plate is individually processed at each stage, the metal plate is sequentially sent to the next stage, processing is added, and processing is performed at the final stage. Is a method of forming an insert collar using a progressive die that completes
The stage in the progressive die is along the feed direction of the metal plate,
A pilot hole drilling stage (A) for drilling pilot holes at predetermined intervals on the left and right sides in the feed direction of the metal plate;
An outer shape cutting stage (B) for cutting a circular shaped processed portion of the metal plate leaving a part of the connecting portion;
A drawing stage (C) for gradually increasing the drawing depth of the molded product to be formed into a cylindrical shape,
A crushing stage (D) for forming a sag at each corner of the squeezed molded product into an edge;
A hole punching stage (E) for punching holes in the narrowed molded product;
A dimple processing stage (F) for forming a depression in the outer peripheral surface of the molded product after punching;
A shaving processing stage (G) for finishing the inner diameter of the molded product;
Out径再molding stage to finish the inner diameter and the outer diameter of the molded article into a predetermined size and (H),
Pinch trim product discharge stage (I) that cuts the throttle flange of the molded product and discharges the finished molded product
And
The progressive die is composed of an upper die and a lower die that are opened and closed by an appropriate drive mechanism, and the lower die is for at least pilot hole drilling and a plurality of outer shape punching processes along the feed direction of the metal plate. Dies, a plurality of drawing dies for drawing a plurality of times, a die for crushing with a lower punch, a die for punching holes, and a dimple forming unit that pressurizes the outer peripheral surface of the molded product from the outside. A pressure device, a shaving die, an inner / outer diameter re-forming die, and a pinch trim die, and the upper die has a pilot hole punch and a plurality of times at positions corresponding to the dies. Punches for outer shape cutting, multiple drawing punches for drawing multiple times, punches for crushing, punches for punching, pressing pins for pressing the molded product from the top, punches for shaving And inner and outer diameter reconstruction And punch use, the molding method of the insert collar comprising a punch for pinch trimming.

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