JP2006212652A - Die device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-cost die device in which a punch is fixed by a simple constitution. <P>SOLUTION: This die device is provided with a punch 32 having a tapered part in the base part, an upper die 41a composed of a punch plate 34 having a punch mounting hole 340 for inserting and fixing the punch 32 and a lower die 41b which is fit to the upper die 41a. The tapered part 34a of the punch mounting hole is provided in a portion of the punch mounting hole 340 so as to correspond to the tapered part 32b of the punch and the punch 32 is inserted into the punch plate 34 and fixed so that the tapered part 32b of the punch is coincident at the tapered part 34a of the punch mounting hole. The cost of the die device is reduced by eliminating complicated machining since the fixing parts of the punch 32 and the punch plate 34 are formed only by the tapered parts worked into a planar shape. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mold apparatus for fixing a punch of a mold.

  When a punch is attached to an upper punch plate with a conventional mold apparatus, a die configuration such as a flange stop method or a stop plate method has been used to fix the punch. Cross-sectional views of the main parts of these conventional mold apparatuses are shown in FIGS. 2 and 3, respectively.

  In FIG. 2, the workpiece 1 is made of a band-shaped metal material. A punch 2 shown in FIG. 2 (a) is made of a steel material, and a processing portion 3 for processing the workpiece 1 into a predetermined shape is provided at the lower end.

  The punch 2 is inserted into a punch mounting hole 4 a provided in the punch plate 4. At this time, the flange 2 a provided at the upper part of the punch 2 is inserted and fixed so as to be sandwiched between the punch plate 4 and the upper backing plate 5. ing.

  The punch holder 6 is firmly fixed to the upper surface of the upper backing plate 5. The material pressing plate 7 has a material pressing plate hole 7 a through which the processed portion 3 provided in the punch 2 is inserted.

  The lower end of the suspension bolt 8 is fixed to the upper surface of the material pressing plate 7.

  The suspension bolt 8 moves up and down freely in the insertion hole 4 b that communicates the punch plate 4 and the upper backing plate 5. Further, the upper end portion of the suspension bolt 8 projects into a punch holder hole 6 a provided in the punch holder 6.

  The material pressing plate 7 is pressed downward by a compression spring 9 and a set screw 10 disposed inside the punch holder hole 6 a via a suspension bolt 8.

  The upper mold 11a is configured as described above.

  Next, the lower mold | type 11b shown in FIG.2 (b) is demonstrated.

  The die 12 is provided with a die processing portion 13 at a position facing the processing portion 3 of the punch 2 at its upper end.

  The die 12 is fixed to the die plate 14, and the lower backing plate 15 is fixed to the lower surface thereof.

  A die holder 16 is tightly fixed to the lower surface of the lower backing plate 15.

  The mold apparatus composed of the upper mold 11 a and the lower mold 11 b configured as described above processes the workpiece 1 into a predetermined shape by the vertical movement operation of the punch holder 6.

  In the case of the mold apparatus shown in FIG. 3, a concave portion 17 is formed in a part of the shaft intermediate portion of the punch 2 in the upper die 11a of FIG. 3A, and a stop plate 18 is attached thereto with a screw 18a. The punch 2 is attached to the punch plate 4 by inserting and fixing the upper end shaft portion 19 of the punch 2 into the punch attachment hole 4 a of the punch plate 4 and sandwiching the punch 2 between the stopper plate 18 and the backing plate 5.

  The operation of this mold apparatus is the same as in FIG.

For example, Patent Document 1 is known as prior art document information relating to the present application.
Japanese Patent Publication No.55-22168

  However, in the conventional mold apparatus shown in FIG. 2, it is necessary to process the flange portion 2a provided integrally with the punch 2 with high accuracy, and the mold apparatus is expensive. Further, in the conventional mold apparatus shown in FIG. 3, since the stop plate 18 is a separate body from the punch 2, it is necessary to process with extremely high precision in order to fix the two with high precision. As with the device, there was a problem of high cost.

  The present invention solves the above-described conventional problems, and an object thereof is to provide a mold apparatus that can fix a punch with a simple configuration and realize low cost.

  In order to solve the above-described conventional problems, a mold apparatus of the present invention includes a punch having a taper portion at a base portion, an upper die including a punch plate having a punch mounting hole for inserting and fixing the punch, An upper die and a lower die are provided, and a taper portion is provided in a part of the punch attachment hole so as to correspond to the taper portion of the punch, and the taper portion of the punch matches the taper portion of the punch attachment hole. In this way, the punch is inserted and fixed to the punch plate.

  With this configuration, it is not necessary to process the collar portion with high accuracy, and a stop plate is not required.

  According to the mold apparatus of the present invention, since only a flat taper portion is provided at the base of the punch, a simple structure that does not require a flange portion or a stop plate can be realized, and cost reduction of the mold apparatus can be realized. .

  The best mode for carrying out the present invention will be described below with reference to the drawings.

(Embodiment)
FIG. 1 is a cross-sectional view of a main part of a mold apparatus according to an embodiment of the present invention, where (a) shows an upper mold and (b) shows a lower mold.

  In FIG. 1A, the punch 32 is made of a steel material, and a processing portion 33 for processing the workpiece 1 into a predetermined shape is provided at the tip thereof. Further, a punch taper portion 32 b is processed in the base portion 32 a of the punch 32.

  The punch 32 is manufactured by cutting a steel square bar. At that time, the taper portion 32b of the punch can be formed very easily by cutting a part of one surface of the square bar at an angle.

  The punch 32 is inserted and fixed in a punch attachment hole 340 provided in the punch plate 34. At this time, a part of the punch attachment hole 340 is formed to correspond to the taper part 32b of the punch, and the taper part of the punch attachment hole is formed. 34a is provided, and the punch 32 is inserted and fixed to the punch plate 34 so that the taper portion 32b of the punch and the taper portion 34a of the punch mounting hole coincide.

  Here, the taper portion 34a of the punch mounting hole is at an angle (indicated by A in FIG. 1A) that is smaller than 90 degrees from the horizontal plane of the punch plate 34. Thereby, the fall at the time of insertion to the punch plate 34 of the punch 32 can be prevented.

  An upper backing plate 35 is tightly fixed to the upper surface of the punch plate 34.

  A punch holder 36 is tightly fixed to the upper surface of the upper backing plate 35.

  The material pressing plate 37 that presses the upper surface of the workpiece 1 has a material pressing plate hole 37a through which the processing portion 33 can be inserted.

  A lower end portion of the suspension bolt 38 is fixed to the upper surface of the material pressing plate 37.

  The main body portion of the suspension bolt 38 moves up and down freely in the insertion hole 34 b that communicates the punch plate 34 and the upper backing plate 35. Further, since the upper end portion of the suspension bolt 38 is regulated by the upper surface of the upper backing plate 35, the material pressing plate 37 is held at a predetermined height in the vertical direction.

  A compression spring 39 is disposed inside a punch holder hole 36 a provided in the punch holder 36, and an upper end thereof is held by the punch holder 36 by a set screw 40. The lower end of the compression spring 39 is in contact with the upper surface of the suspension bolt 38 and presses the suspension bolt 38 downward.

  The upper mold 41a is formed with the above configuration.

  Next, the lower mold | type 41b shown in FIG.1 (b) is demonstrated.

  The die 42 is provided with a die processing portion 43 at a position facing the processing portion 33 of the punch 32 at its upper end.

  The die 42 is fixed to a die plate 44, and a lower backing plate 45 is tightly fixed to the lower surface thereof.

  A die holder 46 is tightly fixed to the lower surface of the lower backing plate 45.

  The lower mold 41b is formed with the above configuration.

  In the operation of such a mold apparatus, the workpiece 1 can be processed into a predetermined shape by fitting the upper mold and the lower mold by the vertical movement of the punch holder 36 as in the prior art.

  With the above configuration, the punch 32 is fixed to the punch plate 34 by the taper portion 32b of the punch and the taper portion 34a of the punch mounting hole being in contact with each other over the entire region. Since both the taper portion 32b of the punch and the taper portion 34a of the punch attachment hole can be formed by an obliquely cut plane, there is no need to process a flange portion on the punch 32 or use a stop plate for attaching the punch 32. A low-cost mold apparatus having an extremely simple configuration can be obtained.

  Since the mold apparatus according to the present invention can be constituted by a punch and a punch plate that are easy to process, it is useful as a mold apparatus that can fix the punch at a low cost.

It is principal part sectional drawing of the metal mold | die apparatus in embodiment of this invention, (a) Essential part sectional drawing which shows an upper mold | type, (b) Essential part sectional drawing which shows a lower mold | type It is principal part sectional drawing of the conventional 1st metal mold apparatus, (a) Essential part sectional drawing which shows an upper mold | type, (b) Essential part sectional drawing which shows a lower mold | type. It is principal part sectional drawing of the conventional 2nd metal mold | die apparatus, (a) Essential part sectional drawing which shows an upper mold | type, (b) Essential part sectional drawing which shows a lower mold | type.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Workpiece 32 Punch 32a Base 32b Taper part of punch 33 Process part 34 Punch plate 34a Taper part of punch attachment hole 34b Insertion hole 35 Upper backing plate 36 Punch holder 36a Punch holder hole 37 Material pressing plate 37a Material pressing plate hole 38 Suspension bolt 39 Compression spring 40 Set screw 41a Upper die 41b Lower die 42 Die 43 Die processing part 44 Die plate 45 Lower backing plate 46 Die holder 340 Punch mounting hole

Claims (2)

A punch having a taper at the base;
A punch plate having a punch mounting hole for inserting and fixing the punch, and an upper mold comprising:
A lower mold that fits with the upper mold,
A taper part is provided in a part of the punch attachment hole so as to correspond to the taper part of the punch, and the punch is inserted and fixed to the punch plate so that the taper part of the punch and the taper part of the punch attachment hole coincide with each other. Mold equipment. 2. The mold apparatus according to claim 1, wherein the taper portion of the punch mounting hole is formed to have an angle smaller than 90 degrees from a horizontal plane of the punch plate.

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