JP2014188524A - Progressive feed multistage press molding apparatus for belt-like weight - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a progressive feed multistage press molding apparatus for a belt-like weight capable of easily and surely securing required mass accuracy to a plate thickness variation in a supplied long-size plate material, on the belt-like weight for a sticking type balance weight having various mass divisions.SOLUTION: A press molding apparatus comprises a series body molding part II for molding a series body S by a small division weight 1e, a final cutting part IV for cutting off a belt-like weight 1a of a predetermined length by selection operation and upper and lower die sets 32a and 35b for executing press operation. The final cutting part IV is constituted of a cutting molding unit 31 composed of upper and lower dies 33a and 35 for cutting off a predetermined length Lc of the series body S, upper and lower packing 34 and 35a for selectively operably supporting these dies and a slide guide 35b for oppositely slidably supporting these upper and lower packing 34 and 35a, ans is arranged so that the upper and lower die sets 32a and 35b can act, and thereby can easily manage mass of the molding belt-like weight 1a.

Description

  The present invention relates to a progressive multi-stage press molding apparatus for a belt-like weight used for a balance weight attached to an inner peripheral surface of a tire wheel.

  As described in Patent Document 1, a belt-like weight that constitutes a pasting type balance weight attached to a tire wheel rim is obtained by cutting a series body in which small compartment weights are sequentially continuous into a predetermined length. The weight is manufactured by, for example, a progressive press molding apparatus as shown in Patent Document 2. That is, a serial press forming apparatus is provided with a serial body forming portion and a final cutting portion, a long plate material is intermittently supplied at a predetermined pitch, and a flexible small cross-sectional portion having a predetermined interval is formed by the serial body forming portion. Thus, a series body in which a plurality of small section weights are sequentially serially formed is formed, and a strip-like weight is formed by cutting the series body to a predetermined length by the selection operation of the final cutting portion. In this way, after forming a progressive press mold in which the serial body forming part and the final cutting part are arranged in order, a long plate material is intermittently supplied at a constant pitch to perform a pressing operation, thereby forming a belt shape of a predetermined length. The weight can be manufactured continuously.

Japanese Patent No. 4025270 JP 2002-336998 A

  However, long plates supplied as rolled steel sheet coils have thickness variations within the range of thickness tolerances according to standards (for example, thickness 3.2 ± 0.16 according to JIS G 3141). In addition, since the mass error of the strip-shaped weight occurs due to the plate thickness variation due to the position in the length direction of the coil, by adjusting the intermittent feed pitch according to the plate thickness of the supplied long plate material, together with the small compartment weight Each time, in order to adjust the arrangement of the multistage molds corresponding to the feed pitch, the press molding apparatus must be stopped and a complicated mold position adjustment operation must be performed.

  An object of the present invention is to provide a strip-shaped weight for a paste-type balance weight having various mass sections, which can easily and reliably ensure the necessary mass accuracy with respect to fluctuations in the thickness of the supplied long plate material. The object is to provide a progressive multi-stage press molding apparatus for weights.

  The invention according to claim 1 is a serial body molding unit that molds a flexible serial body in which small compartment weights are serially arranged in a strip shape by sequentially molding long plate materials intermittently supplied at a constant feed pitch, A band-shaped weight comprising a final cutting part that receives the series body and cuts off a band-shaped weight having a predetermined length by a selective operation, and upper and lower die sets that press to operate the series body forming part and the final cutting part. In the progressive multi-stage press forming apparatus for the weight, the final cutting portion includes an upper die and a lower die for cutting out a predetermined length portion of the serial body, and upper and lower portions correspondingly supporting the upper die and the lower die so as to be selectively operable. And a slide molding unit that slides and supports the upper and lower backings so that they can be elastically held within a predetermined stroke. The characterized in that the die set of said upper and lower is arranged operably correspondingly.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the cutting and molding unit is configured such that a stamp forming part for stamping the belt-like weight is integrally operable.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the serial body molding portion includes a parallel body molding portion for a double row that integrally molds a plurality of rows of serial bodies in parallel, and the parallel body molding portion. The cutting and forming unit has a multi-row configuration in which a plurality of rows of serial bodies are simultaneously cut, and the final cutting portion is configured to simultaneously cut a plurality of rows of serial bodies. Further, the inter-row separation portion is integrally formed.

  According to the invention of claim 1, in the progressive multi-stage press molding apparatus, the serial body forming unit forms the serial body by the press operation of the upper and lower die sets, and the final cutting unit is selectively operated in response to the press operation of the die set. Cuts and cuts off a predetermined length portion of the serial body to sequentially form a belt-like weight of a predetermined length, and in this case, the final cutting portion is configured as a cutting and forming unit separate from the die set. Therefore, the excision specifications can be easily changed by exchanging with a separately prepared cutting and forming unit, so that mass adjustment of the belt-like weight formed at a constant feed pitch by the progressive multi-stage press becomes possible. As a result, mass errors due to fluctuations in plate thickness due to the production lot and longitudinal position of the steel coil of the supply material can be suppressed, and a variety of units with half of the small section weights as mass units Possible mass management for each strip weight is weight products and will have a mass division, a high-quality weight products can be mass-produced by progressive multistage press forming apparatus.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, the final cutting part is provided with a stamping molding part on the cutting molding unit so as to be able to operate integrally, and is displayed on the belt-like weight. Exchange is possible.

  According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, since the inter-row separation portion is attached to the cut molding unit, the inter-row separation portion can be formed in the immediate vicinity of the final cut portion. Further, it is possible to stably form the high-precision strip-shaped weight 1a at the same time in all rows while minimizing the lateral blurring of the serial bodies S ... separated between the rows.

Detailed plan view of sticky weight products Detailed side view of the weight product of FIG. Sectional view of the SS line in FIG. Side view of attached weight product A plan view and a side view showing the outer shape of the banded weight for application Work plan by progressive press forming EE line sectional view of FIG. Cross-sectional view explaining the processing steps for small cross-sections Longitudinal cross section of cutting unit mold unit configuration

Embodiments specifically configured based on the above technical idea will be described below with reference to the drawings.
(Weight product)
As shown in FIG. 1 and a side view of FIG. 1 and FIG. 2, the balance weight 1 for affixed tire wheel is formed with a plurality of small sections by forming small cross-sectional portions 3. A series body divided into weights 1e is formed and cut into a predetermined length to form a belt-like weight 1a according to the product type, and an adhesive member 4 is attached to the bottom surface 2a of the belt-like weight 1a. Configure.

  As shown in FIG. 3 which is a cross-sectional view taken along the line SS in FIG. 2, the small cross-section portion 3 has a full-width cut portion 11 formed by a depth cut extending over the full plate thickness T of the long plate P. The remaining portion is formed as a top surface notch 12 having a depth D from the upper surface 2b of the long plate material P. For example, a thickness from the bottom surface 2a side with a width dimension B at the center position of the entire width W of the long plate material P It is formed in a cross-sectional shape with a dimension H.

  The maximum distance G of the gap portion by the full thickness cut portion 11 is formed to be smaller than the full thickness dimension T of the long plate P. The adhesive member 4 is a tape-like adhesive means such as a double-sided pressure-sensitive adhesive tape formed in the shape of the bottom surface 2a of the serial body, and includes a peeling member 4a superimposed on the adhesive member 4. The peeling member 4 a is provided with a folded portion 4 b that is folded back within the range of the bottom surface 2 a from the edge of the adhesive member 4.

  The balance weight 1 can be formed to have a bending rigidity suitable for manual work depending on the degree of freedom in setting the width and thickness of the small cross section 3. Moreover, since the depth D of the upper surface notch 12 can be reduced by reducing the width dimension B of the small cross-sectional portion 3, even in the case of press working, brittleness due to work hardening is suppressed, and bending toughness is improved. Secured. Accordingly, when the balance weight 1 is attached to the inner peripheral surface of the wheel C, the balance weight 1 is held with one hand after being bent into a curve that matches the curvature of the inner peripheral surface, and a side view of the attached state is shown in FIG. In addition, since it can be easily mounted at a predetermined angular position, the mounting workability can be ensured.

(Band weight)
As shown in FIG. 5 corresponding to a plan view and a side view of the outer shape of the belt-like weight 1a, a series body in which small section weights 1e having a predetermined plate thickness T are sequentially serially connected by a small cross section 3 is divided into small section weights. In order to cut both ends into a length Lw corresponding to a product type that is serialized by a mass section having half of the weight 1a as a unit, continuous molding is performed by a progressive press. In the example shown in the drawing, five small section weights 1e having a mass of 5 g are connected in series, the front and rear ends are cut to a length Lw as a 25 g product within the required tolerance, and the mass number of the product type is displayed by surface marking.

(Manufacturing process)
The manufacturing process of the belt-like weight 1a is as follows. As shown in FIG. 6, a work plan view of the forming process by the progressive press, the long plate material P having a width dimension covering the belt-like weights 1a arranged in four rows is on the left side of the figure. Are intermittently fed to the press device at a predetermined feed pitch F, so that the drilling process I, the parallel body forming subprocess II, the inter-column separation subprocess III, the final cutting process IV, which are sequentially arranged along the feed direction, By passing through the stamping process V mold, four rows of strip weights 1a... Are continuously manufactured.

  The drilling process I is a process of drilling pilot holes H at positions between a plurality of rows, and processing positioning of the subsequent process is performed by the pilot holes H at a predetermined feed pitch F interval position.

  In the parallel body forming sub-process II, the column indirect hand is formed by forming the main part of the small section weight 1e including the processing of the small cross section 3 while leaving the column indirect hand Q between the plurality of adjacent columns. This is a step of forming a parallel body R in a state where all rows are connected in the width direction by Q. The column indirect hand Q of the parallel body R is formed by half punching up to the middle of the plate thickness T as shown in FIG.

  When the processing steps of the full thickness cut portions 11 and 11 of the small cross section 3 in the parallel body forming sub-process II will be described in detail, as shown in FIG. It is divided into a first step of forming the basic cut portion 21 of a) and a second step of forming the final full thickness cut portions 11 and 11 by the opposed cut portions 23 and 23 of FIG. The upper surface cut portion 12 is formed by press working or the like in the second step or in a separate step.

  In the first step, as shown in FIG. 8 (a), the total thickness T (for example, in the thickness direction from each of the bottom surface 2a and the top surface 2b of the long plate material P for each full thickness cut portion 11, 11). Within a range of 3.2 mm), the basic notches 21 and 22 having a constant depth A (for example, 1.0 mm) on the lower surface and a constant depth A1 (for example, 1.4 mm) are formed on the upper surface. The base cut portion 22 on the upper surface 2b side has a depth and a processing width within a range not reaching the base cut portion 21 on the bottom surface 2a side as a press for pressing the base cut portion 21 on the bottom surface 2a side. It is an incidental processing groove.

  In the second step, as shown in FIG. 8B, the opposing notch 23 having a depth that reaches the foundation notch 21 and faces the foundation notch 21 on the bottom 2a side is changed to the foundation on the top 2b side. A groove is formed by a press die so as to overlap the cut portion 22. A full-thickness cut portion 11 having a depth extending over the full plate thickness T is formed by the opposed cut portion 23 and the previously formed basic cut portion 21. In this case, by using a press die having a small taper angle θ (eg, 30 °), the groove width G is kept small with respect to the total thickness T, and the full thickness cut portion 11 extending over the total thickness T is formed. can do.

  Therefore, since the full thickness cut portions 11 and 11 can be formed by suppressing the gap dimension G to be smaller than the total plate thickness dimension T by using a thin punch, the mass dispersion in the longitudinal direction can be suppressed to ensure the merchantability. be able to. Further, in the second step, the full thickness cut portion 11 can be processed by forming the opposed cut portion 23 with a press die having a predetermined depth D with respect to the width W of each row. It can be processed efficiently.

  In the inter-column separation subprocess III, the serial body S is formed by cutting out the column indirect hands Q of the parallel bodies R, and constitutes the serial body process together with the parallel body formation subprocess II. The incision processing of the row indirect hand Q... Is performed by performing both outermost shaping of the parallel body R together, so that both sides of the series bodies S in all rows can be equally molded.

  In the inter-column separation sub-process III, the forming accuracy of the serial body S can be ensured by cutting off the half-punched column indirect hand Q without excessive molding distortion. Further, by arranging the inter-column separation small process III at the final position as the serial body process, it is possible to shift to the subsequent final cutting process IV while minimizing the lateral blurring of the serial body S.

  Therefore, by forming the relatively low rigidity small cross-sectional portion 3 at the connecting portion in the series direction of the small compartment weight 1e in the parallel body forming small process II, while ensuring the flexibility as the belt-like weight 1a, It is possible to increase the functionality of the strip-shaped weight made of a thick plate material while suppressing a decrease in molding accuracy due to the lateral blurring of the multiple rows of serial bodies S.

  The final cutting step IV is a step of cutting the serial bodies S in each row into the strip weight 1a having a length Lw corresponding to the product type. In detail, by using the cutting die corresponding to the product type and selectively operating the press die at the feed position corresponding to the length Lw corresponding to the product type, the serial bodies S in each row are continuously 2 By taking a predetermined excision length Lc between the two small compartment weights 1e, 1e, the strip weight 1a is cut off.

  In this case, by exchanging the mold and adjusting the cutting length Lc, high-precision mass management corresponding to the product type becomes possible, and it is supplied in a press device that always operates at a constant feed pitch. It is possible to cope with fluctuations in the plate thickness T depending on the production lot of the long plate material P. In particular, by configuring the die of the final cutting process IV as a cutting molding unit operable by a die set common to other processes, and preparing a cutting molding unit having a cutting length Lc corresponding to the material plate thickness for each product type It is possible to respond quickly to changes in molding conditions.

  The marking step V is a step of marking the product type display corresponding to the product type for the serial bodies S in each row. This marking process V is operated simultaneously with the final cutting process IV by using a mold corresponding to the product type, thereby enabling the marking corresponding to the product type to be displayed at the center position of the strip weight 1a.

(Mold configuration)
The mold configuration of the final cutting process IV will be described. As shown in FIG. 9, a longitudinal sectional view of the main part is shown by a cutting molding unit 31 that operates by receiving press operations of upper and lower die sets 32a and 32b common to all processes. Consists of the final cutting step IV. That is, the cutting and forming unit 31 includes a punch 33a for the final cutting process so that it can be selectively operated, and if necessary, a punch 33b for the marking process is attached so that it can be selectively operated. They are attached so as to be detachable integrally with the upper and lower die sets 32a and 32b.

  Specifically, a pair of upper molds 33a, 33b, and 33c are supported by an upper backing plate 34 and a positioning punch plate 34a, respectively, and a movable side is configured together with a work holding stripper 34b. Further, the die 35 serving as a lower die for receiving the punches 33a, 33b, and 33c and the lower backing 35a for holding the die are fixed sides, and a guide member 35b is provided between the upper and lower sides to constitute the cutting and forming unit 31.

  The stripper 34b is elastically held by a presser spring 34c... Within a predetermined distance from the upper backing plate 34, and is elastically supported by a return spring 35c... From the lower backing 35a, and the upper limit of the upper backing plate 34 is restricted by a slide guide 35b. By providing the support spring 35d as possible, the movable side is elastically held at a predetermined height position so as to be slidable.

  Further, the punch 33a for the final cutting process and the punch 33b for the marking process are slidably supported on the upper backing plate 34 so as to be retractable to the non-operation position, and both punches 33a, 33b are selectively moved back and forth by a control signal. The upper backing plate 34 is provided with a switching member 36 for switching to the operating position.

  The cutting and molding unit 31 having the above-described configuration can detachably position and fix the lower backing 35a of the unit 31 to a lower die set 32b attached to a bolster frame (not shown) on the fixing side of the press device. By attaching a chute 37 for guiding and discharging the belt-like weight 1a on the outlet side, the upper backing plate 34 is lowered by the lowering Hd of the upper die set 32a attached to the slide frame (not shown) which is the movable side of the press device, Each time, pressing is performed over the entire process including the final cutting process IV while pressing the work by the lowering Hs of the stripper 34b.

  Further, the punch 33a for the final cutting process can be selected according to the product type by being selectively operated by the switching member 36. By attaching the punch 33b for the marking process to the cutting molding unit 31, an individual configuration Thus, it is possible to perform the reliable simultaneous selection operation by the common switching member 36 without incurring the complication associated with.

  Further, by attaching the punch 33c for cutting between rows, which is the final step in the serial body forming step, to the cutting forming unit 31, it is possible to configure the sub-row separation small step III immediately adjacent to the final cutting step IV. It is possible to form the high-precision strip-shaped weight 1a... In all rows at the same time with minimal lateral blurring of the serial bodies S.

  Since the cutting and forming unit 31 having the above-described configuration can be attached and detached as a single component, it can immediately respond to the switching of product types, and also can cope with fluctuations in the plate thickness of the long plate P. High accuracy of the belt-like weight 1a by replacing the cutting molding unit 31 without changing the feed pitch F of the feed press, and therefore without requiring troublesome position adjustment of the mold arrangement in all processes. Therefore, the high-quality belt-like weight 1a can be efficiently and stably formed.

DESCRIPTION OF SYMBOLS 1a Band-shaped weight 1e Small division weight 3 Small cross-section part 31 Cutting molding unit 32a Upper die set 32b Lower die set 33a Cutting punch (upper mold)
33b Engraved punch (upper die)
33c Inter-row separation punch (upper die)
34 Top backing
35 die (lower mold)
35a Lower backing 35b Slide guide 35d Support spring 36 Switching member F Feeding pitch Lc Cutting length Ls Forward / backward movement Lw Strip weight length P Long plate material S Serial body
II Parallel body molding part (series body molding part)
III Separation between rows (series body forming part)
IV Final cutting part (Final cutting part)
V engraving part (engraved part)

Claims (3)

A series body forming section that forms a flexible series body in which small section weights are serially arranged in a band by sequentially forming long plates that are intermittently supplied at a constant feed pitch, and a selective operation in response to the series body. A progressive multi-stage press molding for a strip weight comprising a final cutting portion for cutting a strip weight of a predetermined length by the above and an upper and lower die set that presses to operate the serial body forming portion and the final cutting portion. In the device
The final cutting part is configured to oppose the upper and lower molds for excising a predetermined length portion of the serial body, upper and lower backings for correspondingly supporting the upper mold and the lower mold, and the upper and lower backings. And a slide molding unit comprising slide guides that are slidably supported so as to be elastically held within a predetermined stroke, and the upper and lower die sets are arranged so that the upper and lower die sets can operate correspondingly. A progressive multi-stage press molding device for strip weights.   2. The progressive multi-stage press molding apparatus for a belt-like weight according to claim 1, wherein the cut-molding unit is configured to be able to integrally operate a stamping molding part that marks the belt-like weight.   The serial body forming section separates a plurality of rows of serial bodies integrally formed in parallel and a plurality of rows of serial bodies integrally formed in parallel by the parallel body forming section. The inter-row separation portion is formed integrally with the cut molding unit as a double-row configuration in which the final cut portion is simultaneously cut into a plurality of rows of serial bodies. A progressive multi-stage press molding apparatus for a belt-like weight according to any one of claims 1 and 2.

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