JP2007118017A - Double-action press device and press method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a double-action press device which can be used jointly as a single-action press device and its press method. <P>SOLUTION: This device is a double-action press device A which is provided with a projected die 1 and a recessed die 2 between which a blank material W is held and which are approachable and separable, an inner slider 3 which is situated on the opposite side of the projected die 1 to the recessed die 2 and by which the recessed die 2 is pressed along the pressurizing direction in which the blank material W is pressed by approach of the projected die 1 and the recessed die 2 and an outer slider 4 which is installed in parallel to the inner slider 3 and moved back and forth along the pressurizing direction and, furthermore, a connecting bolt 7 for connecting the concave die 2 movably back and forth along the pressurizing direction to the outer slider 4. The press device is constituted so that the recessed die 2 can be moreover pressed with the inner slider 3 to working completing position where the working of the blank material W is completed after pressing the recessed die 2 until the recessed die 2 is brought into contact with the blank material W with the outer slider 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a double action press apparatus and a press method that can be used together as a single action press apparatus.

  As a general double action press apparatus, for example, an apparatus as shown in Patent Document 1 is known. Such a general double action press apparatus B1 is shown in FIG.

  As shown in FIG. 6, the double action press device B <b> 1 includes a convex mold 111, a concave mold 112, an inner slider 113, an outer slider 114, a blank holder 115, and a bed 118. The convex mold 111 is fixed to the lower surface of the inner slider 113 in FIG. 6 so that the convex portion faces downward in FIG. 6, and can move integrally with the inner slider 113. The concave mold 112 is mounted on the bed 118 such that the concave portion faces upward in FIG. The concave mold 112 includes a support surface 112 a that supports the peripheral edge of the blank material W. The inner slider 113 is movable in the vertical direction in FIG. 6 and can apply pressure in the downward direction in FIG. When the convex mold 111 is brought into contact with the blank material W installed in the concave mold 112 and pressed by the inner slider 113, the convex mold 111 and the concave mold 112 are fitted with the blank material W interposed therebetween. It is formed as follows. The outer slider 114 is movable in the vertical direction in FIG. 6 and can be pressed downward in FIG. As shown in FIG. 6, the blank holder 115 is connected to the outer slider 114, and the lower surface of the blank holder 115 is formed so as to face the support surface 112 a with the blank material W interposed therebetween. With the pressurizing function of the outer slider 114, the blank holder 115 can press and restrain the blank material W from above in FIG.

  In other words, the double action press apparatus B1 uses a convex mold 111 joined to the inner slider 113 to form a concave metal plate W sandwiched and fixed between the blank holder 115 connected to the outer slider 114 and the support surface 112a. This is a die press device for drawing into a die 112 and drawing.

  By the way, as a press apparatus, single action press apparatus B2 as shown in FIG. 7 is also generally used. As shown in FIG. 7, the single action press device B <b> 2 includes a convex mold 121, a concave mold 122, a slider 123, a blank holder 125, a cushion rod 126, and a bed 128. This single action press device B2 presses the concave mold 122 from above in FIG. 7 by the slider 123, and the blank material W installed on the blank holder 125 is applied to the convex mold 121 mounted on the bed 128. This is a pressing device of a pressing type. The cushion rod 126 can be contracted while maintaining appropriate elasticity so that the concave mold 122 and the blank holder 125 pressed by the slider 123 can be smoothly lowered in FIG.

  Thus, since it is expensive to prepare both of two different types of press devices, a press device capable of performing both a single action press and a double action press has been desired. However, the single action press device B2 is effective for a mold having a shallow recess of the concave mold 122 due to a limit in the amount of contraction of the cushion rod. However, the recess is deep like the concave mold 112, for example. It was unsuitable for use against molds. For this reason, in principle, a press device of the double action press method is desirable as a press device having a high versatility capable of performing both a single action press and a double action press.

  Therefore, a double action press apparatus B3 in which the molds 121 and 122 of the single action press apparatus B2, the blank holder 125 and the like are incorporated in the double action press apparatus B1 will be examined. FIG. 8 shows a cross-sectional view of the double action press device B3.

  As shown in FIG. 8, if the concave mold 122 is sized to fit inside the outer slider 114, the inner slider 113 does not obstruct the outer slider 114 even if the concave mold 122 is attached to the inner slider 113. Can be moved freely up and down. In this case, it is possible to perform a single-action press process using the concave mold 122 and the convex mold 121 using the double action press apparatus B3.

  However, if the size of the concave mold 122 does not fit inside the outer slider 114, the outer slider 114 becomes an obstacle even if the concave mold 122 is attached to the inner slider 113, and the inner slider 113 can be moved up and down freely. It cannot be moved to. Even if the concave mold 122 is attached to the outer slider 114, the outer slider 114 descends before the inner slider 113 due to the nature of the double action press device. For this reason, press working is performed with the pressure applied by the outer slider 114. In general, the pressurizing capacity of the outer slider 114 is for restraining the blank W, so that it is only about half of the pressurizing capacity of the inner slider 113, which is insufficient for press working.

JP 11-290960 A

  The present invention has been conceived under the circumstances described above, and is a double action press device and press that can be easily processed even with a die for a single action press device having a size that does not fit inside the outer slider. Providing a method is an issue.

  In order to solve the above problems, the present invention employs the following technical means.

  The double action press device provided in the 1st side of the present invention is the 1st metallic mold and the 2nd metallic mold which can approach and space apart on both sides of a blank material, and the 1st above to the 2nd metallic mold. An inner slider which is located on the opposite side of the mold and presses the second mold along a pressing direction in which the blank material is pressed by the approach of the first mold and the second mold; An outer slider that is installed outside the inner slider and reciprocates along the pressurizing direction, and a double action press device, wherein the second mold is pressed against the outer slider. And a connecting means for reciprocally moving along a direction. After the second mold is pressed by the outer slider until it comes into contact with the blank material, the inner slider is used to The second mold, characterized in that it is further pressable configured to process completes the processing completion position of the blank.

  According to such a configuration, this press apparatus uses a convex mold as the first mold and a concave mold as the second mold, so that the single action press has a size that does not fit inside the outer slider. It is possible to easily perform press working using a mold for the apparatus. That is, by providing the connecting means, the concave mold can be pushed by the inner slider by a distance necessary for press working. Therefore, the blank material can be appropriately pressed using the mold for the single action press device.

  The pressing method provided in the second aspect of the present invention uses the pressing device provided in the first aspect of the present invention, presses the second mold with the outer slider, A step of bringing a part into contact with the blank material, a step of pressing the second mold by the inner slider, and press-forming the blank material sandwiched between the first mold and the second mold; It is characterized by including.

  According to such a configuration, the second die pressed against the outer slider is pressed and restrained by the second die, and further, the second die is pressed by the inner slider. It is possible to press the blank material pressed into the mold into the first mold and press-form it.

  Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the drawings.

  Hereinafter, preferred embodiments of the present invention will be specifically described.

  FIG. 1 shows an example of a double action press device provided by the first aspect of the present invention. The vertical direction in FIG. 1 is assumed to be along the direction of gravity.

  According to FIG. 1, the double action press apparatus A includes a convex mold 1, a concave mold 2, an inner slider 3, an outer slider 4, a blank holder 5, a cushion rod 6, a connecting bolt 7, a bed. 8 and. This double action press apparatus A is an apparatus that presses a blank material W installed in a blank holder 5 between a convex mold 1 and a concave mold 2 from above and below.

  As shown in FIG. 1, the convex mold 1 is mounted on the bed 8 so that the convex portion 1a faces upward.

  The concave mold 2 is suspended from the outer slider 4 by a connecting bolt 7 so that the concave portion 2c faces downward in FIG. For this reason, the concave mold 2 is provided with a cutout 2b for allowing the connecting bolt 7 to pass therethrough. The concave portion 2c of the concave mold 2 is formed so as to be fitted with the convex portion 1a of the convex mold 1 and the blank material W interposed therebetween. Further, a support surface 2 a that presses against the blank material W is formed on the periphery of the recess 2 c of the concave mold 2.

  The inner slider 3 is connected to a pressure source (not shown) and is movable in the vertical direction. The lower surface 3 a of the inner slider 3 is parallel to the upper surface 2 d of the concave mold 2 and is suitable for applying downward pressure to the concave mold 2.

  The outer slider 4 is connected to a pressure source (not shown) and is movable in the vertical direction. The lower surface 4 a of the outer slider 4 is parallel to the upper surface 2 d of the concave mold 2 and is suitable for applying downward pressure to the concave mold 2. However, the pressure capacity of the outer slider 4 is weaker than that of the inner slider 3. Further, an opening 4 b for accommodating one end of the connecting bolt 7 is formed on the lower surface 4 a side of the outer slider 4. The opening 4 b is cut from the side surface 4 c of the outer slider 4 in order to accommodate the connecting bolt 7.

  The blank holder 5 is supported by a cushion bar 6 and has a flat upper surface 5a. A blank material W can be mounted on the upper surface 5a. The blank holder 5 is installed at a position corresponding to the support surface 2a, and has a structure in which the blank material W is sandwiched and fixed from above and below. Further, in a state where no pressure is applied to the blank holder 5 from above, the length of the cushion rod 6 is such that the blank material W installed on the blank holder 5 is above the top of the convex mold 1. It has been adjusted.

  The cushion rod 6 is installed on a bed 8 which is a base portion, and supports the blank holder 5. The cushion rod 6 is configured to be able to expand and contract by pressure from above, and at least a length corresponding to the pressing amount required to press the blank material W into the mold can be expanded and contracted.

  FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is a sectional view taken along line III-III in FIG. 2 and 3, the connecting bolt 7 includes a bolt head 7a, a ring 7b, a shaft 7c, a bolt nut 7d, and a guide bracket 7e. A plurality of the connecting bolts 7 are provided in parallel along the depth direction of FIG.

  As shown in FIG. 2, the bolt head 7a is fitted into the opening 4b, and since the lateral width of the bolt head 7a is wider than the minimum width of the opening 4b, the outer slider 4 and the connecting bolt 7 can be coupled. . The ring 7b can be inserted into the shaft 7c through its inner hole, and can reciprocate up and down along the shaft 7c. However, the inner hole of the ring 7b is smaller than the bolt nut 7d. The shaft 7c extends downward from the bolt head 7a, and a screw (not shown) is cut near its lower end. A female screw (not shown) that meshes with the screw is cut in the bolt nut 7d, and the bolt nut 7d is fastened to a portion where the screw of the shaft 7c is cut. Since the inner hole of the ring 7b is smaller than the bolt nut 7d, the ring 7b is restricted from moving downward by the bolt nut 7d. As shown in FIG. 3, the guide bracket 7e includes a cylindrical part surrounding the shaft 7c and a plate-like part extending to the left and right. The guide bracket 7e functions to guide the concave mold 2 while restricting the movement of the shaft 7c in the plane of FIG.

  As shown in FIGS. 2 and 3, the connecting bolt 7 is assembled to the concave mold 2 so that the ring 7b is accommodated in the cutout 2b. As shown in FIG. 2, the lateral width of the cutout 2b at the portion facing the upper surface 2d is wider than the lateral width of the cylindrical portion of the guide bracket 7e and narrower than the outer diameter of the ring 7b. In addition, the cutout 2b is a cavity having a width that allows the cylindrical portion of the guide bracket 7e to pass freely. As a result, the concave mold 2 has a gap between the lower end position suspended by the connecting bolt 7 and the upper end position indicated by the phantom line in FIG. Can be reciprocated. Here, the reciprocating distance of the concave mold 2 can be adjusted by the length of the guide bracket 7e in the vertical direction, the length of the shaft 7c, and the position of the bolt nut 7d. This reciprocating distance may be set as appropriate in accordance with the pressing distance of the concave mold 2 required for pressing the blank material W.

  The double action press apparatus A configured as described above has a structure in which the concave mold 2 is suspended from the outer slider 4 by a connecting bolt 7 so as to reciprocate. That is, the concave mold 2 can be lowered away from the outer slider 4. For this reason, with the outer slider 4 fixed, the concave mold 2 can be pushed down by the inner slider 3 and the blank material W can be pressed against the convex mold 1. Thereby, this double action press apparatus A can be pressed using the mold of the conventional single action press apparatus by the method described below, and has high versatility.

  Hereinafter, a pressing method using the double action press apparatus A will be described.

  First, from the state shown in FIG. 1, the blank material W is held as shown in FIG. 4. That is, the outer slider 4 is lowered until the support surface 2 a of the concave mold 2 comes into contact with the blank material W. At this time, the blank material W is supported by the blank holder 5, and the blank holder 5 is supported by the cushion rod 6. The blank material W is pressed against the blank holder 5 by the weight of the concave mold 2 and the pressure of the outer slider 4. The pressing force applied to the blank holder 5 is borne by the cushion rod 6. At this time, the cushion bar 6 holds the blank holder 5 at an appropriate height after contracting according to the pressing force. At this time, the concave mold 2 is in a state of being close enough to contact the outer slider 4.

  Next, as shown in FIG. 5, the blank material W is pressed. In this step, the inner slider 3 is lowered while the outer slider 4 is stopped. The concave mold 2 is lowered by the lowering of the inner slider 3. In this descent, the concave mold 2 is separated downward from the outer slider 4. Here, as shown in FIG. 2, the concave mold 2 can be lowered until it comes into contact with the ring 7 b of the connecting bolt 7. As shown in FIG. 5, when the concave mold 2 is lowered, the blank material W is pressed in a state of being sandwiched between the concave mold 2 and the convex mold 1. Then, the concave mold 2 is pressed to a press completion position where the blank material W is completely pressed. At this time, the concave mold 2 is located away from the outer slider 4. Further, the cushion rod 6 is contracted as illustrated by the pressing force of the inner slider 3. According to the double action press device A, by providing the connecting bolt 7 and the cushion rod 6, this pressing process can be performed smoothly.

  According to the above process, in the double action press apparatus A, the concave mold 2 can be lowered with the lowering of the inner slider 3 within a certain range even after the outer slider 4 is fixed. Therefore, the blank material W can be appropriately pressed so as to be sandwiched between the convex mold 1 and the concave mold 2. Further, the concave mold 2 also serves to hold the blank material W. For this reason, this double action press apparatus A can be smoothly pressed using the mold of the single action press apparatus. In addition, the concave mold 2 having a size larger than that of the inner slider 3 can be appropriately mounted. Thereby, a comparatively large press part can be manufactured.

  The double action press apparatus and the press method according to the present invention are not limited to the above-described embodiments. The specific configuration of each part of the double action press apparatus can be changed in various ways. For example, many patterns are conceivable for the number and arrangement of the connecting bolts 7, and the length of the shaft 7c of the connecting bolt 7 can be freely set.

It is sectional drawing which shows an example of the double action press apparatus which concerns on the 1st side surface of this invention. It is sectional drawing which shows an example of the connection means which concerns on this invention along the II-II line of FIG. It is sectional drawing which follows the III-III line of FIG. It is sectional drawing which shows before the press start of the double action press apparatus A. It is sectional drawing which shows after the press completion of the double action press apparatus A. FIG. It is sectional drawing which shows an example of a common double action press apparatus. It is sectional drawing which shows an example of a common single action press apparatus. It is sectional drawing which shows an example at the time of attaching the type | mold of a small single action press apparatus to a double action press apparatus.

Explanation of symbols

A Double action press device W Blank material 1 Convex die (first die)
1a Convex part 2 Concave mold (second mold)
2a Support surface 2b Cutout 2c Recess 2d Upper surface 3 Inner slider 3a Lower surface 4 Outer slider 4a Lower surface 4b Opening 4c Side surface 5 Blank holder 5a Upper surface 6 Cushion rod 7 Connection bolt (connection means)
7a Bolt head 7b Ring 7c Shaft 7d Bolt nut 7e Guide bracket 8 Bed

Claims (2)

A first mold and a second mold that can be approached and separated with a blank material interposed therebetween;
The second mold is located on the opposite side of the first mold, and the first mold and the second mold approach each other along the pressurizing direction in which the blank material is pressed. 2 Inner slider to press the mold,
An outer slider installed outside the inner slider and reciprocating along the pressurizing direction, and a double action press device comprising:
A connecting means for connecting the second mold to the outer slider so as to reciprocate along the pressing direction;
After pressing the second mold by the outer slider until it comes into contact with the blank material,
The double action press device, wherein the inner slider is configured so that the second die can be further pressed to a processing completion position where the processing of the blank material is completed. A method using the double action press device according to claim 1,
Pressing the second mold with the outer slider and bringing a part of the second mold into contact with the blank material;
Pressing the second mold with the inner slider and press-forming the blank material sandwiched between the first mold and the second mold.

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