JPH0661311U - Molding equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] In a molding machine having a pair of rotary molds in a fixed mold, it is possible to machine a work into an accurate shape even at a connecting portion of the pair of rotary molds. Provide a device. [Structure] A fixed die, a pair of cylindrical rotary dies 16, 36 arranged in the fixed die with a part exposed to the outside of the fixed die, and arranged at a predetermined angle to each other, and a molding process. Later, when the pair of cylindrical rotary molds 16 and 36 return-rotate, they are provided with moving mechanisms 16c and 24 that move the pair of cylindrical molds in directions away from each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a molding apparatus in which a pair of cylindrical rotary dies whose outer surfaces are partially exposed are arranged in a fixed die at a predetermined angle.

[0002]

[Prior art]

 BACKGROUND ART Conventionally, a technique of forming a thin plate such as a sheet metal using a pair of upper and lower molds is well known. In forming such a thin plate, generally, a method of bending the thin plate by lowering the upper die vertically against the work placed on the lower die and abutting the upper die is used. In this way, when bending a thin plate, there is no problem if only bending the thin plate in the vertical direction, but often the finished shape of the thin plate enters the lower mold from the descending trajectory of the upper mold. It may have to be shaped. In such a case, in the conventional case, the vertical downward movement of the upper die is converted into the lateral movement of the slide die through the cam, and the slide die is inserted into the lower die from the lateral direction for machining. The method of doing it was taken.

However, in the case where the slide mold is used to form a part that enters the lower mold in this way, if the work is lifted vertically upward when the work is removed from the lower mold, There was a problem that the part that entered the inside was an obstacle and the work could not be removed from the lower mold. Conventionally, as a molding method for solving such a problem, a method disclosed in JP-B-63-41652 is known. In this molding method, as shown in FIG. 10, a rotatable cylindrical cam member 2 is arranged inside the lower mold 3, and the cam member 2 is in the molding position shown by the solid line in the drawing. The negative angle forming part 5 is pressed against the cam member 2 from the side to form the negative angle forming part 4 on the work W. After this forming operation, the cam member 2 is moved to the position shown by the chain double-dashed line in the figure. The cam 2 is rotated to retract the tip 2a of the cam member 2 from the negative angle forming part 4, and the work W is lifted upward from the lower mold to be removed.

[0004]

[Problems to be solved by the device]

 By the way, when a work having a bent portion such as a side frame of an automobile body is to be formed by using the above-mentioned cam member 2, that is, a cylindrical rotary die, as shown in FIG. Similarly, it is necessary to connect and use the two rotary molds 50 and 52 before and after the bent portion. In this case, when the rotary die is rotated so that the work can be taken out after the molding of the work is completed, there are the following problems. That is, when the rotary dies 50 and 52 are rotated in the front direction in the drawing after the completion of molding, the point A of the rotary die 50 moves to the point A ′ as shown in FIG. Moves to the point B ', so when trying to rotate these rotary molds, the respective rotary molds try to get inside the mating rotary molds and actually rotate the rotary molds. I can't let you do it. If the rotary die is to be actually rotated, it is necessary to provide a gap between the rotary die 50 and the rotary die 52 as shown in FIG. However, if a gap is provided between the two rotary dies in this way, the work will not be formed into the desired shape in the gap between the two rotary dies, and the bent portion of the work will not be formed. There is a problem that the work is not formed into a clean shape at the edge part of.

Therefore, the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a molding apparatus having a pair of rotary molds in a fixed mold, and An object of the present invention is to provide a forming / processing apparatus capable of processing a work into an accurate shape even at a connecting portion.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems and to achieve the object, the molding processing apparatus of the present invention comprises a fixed mold, a fixed mold, a part of which is exposed to the outside of the fixed mold, and a fixed mold. A pair of cylindrical rotary molds arranged at a constant angle, and a moving means for moving the pair of cylindrical molds in a direction away from each other when the pair of cylindrical rotary molds return-rotate after molding. It is characterized by having.

Further, in the molding apparatus according to the present invention, the moving means is provided in the pair of cylindrical rotary molds and the diagonal groove provided in the fixed mold, and is fitted in the diagonal groove. It is characterized by including a fixing pin.

[0008]

[Action]

 As described above, since the molding processing apparatus according to the present invention is configured, by providing the moving means for moving the pair of cylindrical rotary molds in the direction of separating from each other when the pair of cylindrical rotary molds makes the return rotation. However, even if a pair of cylindrical molds are in close contact with each other during molding, after the completion of molding, these cylindrical molds can rotate while separating from each other. Therefore, during molding, the two cylindrical molds are in close contact with each other. Since the work can be performed, the work can be formed into an accurate shape even at the two cylindrical connection portions.

[0009]

【Example】

 Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a diagram showing a state in which the forming / processing apparatus of one embodiment is applied to processing of an edge portion of a side frame of a vehicle body of an automobile as a work W. 2 is a sectional view taken along the line CC in FIG. 1. In the molding processing apparatus of this embodiment, the tip portion (edge portion) W1 of the work W is shown by a solid line from a shape shown by a two-dot chain line. It is for forming into different shapes. 3 is a partially enlarged view of FIG. 1, and FIG. 4 is a view on arrow AA of FIG. 5 to 7 are sectional views taken along the line BB in FIG. 3, and show the procedure for forming the work W.

First, with reference to FIG. 7, the structure of the molding apparatus 10 of one embodiment will be described. In FIG. 7, a fixed mold 12 is arranged on a molding apparatus main body (not shown) arranged on the floor surface of a factory or the like. A shape corresponding to the non-processed portion W2 of the work W is formed on the upper surface 12a of the fixed die 12, and the non-processed portion W2 of the work W is held on the upper surface 12a of the fixed die 12. There is. The unmachined work W is formed in the shape shown by the chain double-dashed line in the figure, and the tip portion W1 of this work W is formed by this forming machine 10.

A cylindrical fitting hole 14 is formed in the fixed mold 12, and a cylindrical rotary mold 16 that acts as a part of the lower mold is provided in the fitting hole 14 around its axis. It is rotatably attached to. A recess 16a is formed on the right side of the rotary die 16 in the figure, and the recess 16a acts as a female die. That is, an opening 12b that is open to the outside is formed in the portion of the fixed mold 12 that corresponds to the recess 16a, and the recess 16a is exposed to the outside of the fixed mold 12 through this opening 12b. ing. Then, the end portion W1 of the work W is bent from the shape shown by the chain double-dashed line to the shape that follows the recess 16a through the opening 12b, thereby completing the side frame of the automobile. Is.

A wear plate 18 is fixed to the recess 16 b that is continuous with the recess 16 a, and a vertical force is applied to the wear plate 18 so that the rotary mold 16 moves inside the fitting hole 14. It is designed to rotate. In the state shown in FIG. 7 in which the work W is actually processed, the wear plate 18 has its lower surface 18a in contact with the upper surface 12c of the fixed die 12 and is supported from below by the upper surface 12c. There is.

A fitting hole 12 d extending vertically is formed in the upper surface 12 c of the fixed mold 12, and a return pin 22 is mounted in the fitting hole 12 d via a compression spring 20. There is. The return pin 22 is always urged upward in the drawing by the urging force of the compression spring 20, and therefore the wear plate 18 is pushed up by the return pin 22 and always receives the urging force in the counterclockwise direction in the drawing. There is.

A cam groove 16c is formed on the left side of the rotary die 16 in the figure, and the cam groove 16c extends along the longitudinal direction of the rotary die 16 as shown in FIGS. 3 and 4. It is formed so that it is inclined to the left by a predetermined angle. A cam follower 24 is fixed to the fixed die 12, and a roller 24a at the tip of the cam follower 24 enters the cam groove 16c. Therefore, when the rotary die 16 rotates counterclockwise in FIG. 7, the rotary die 16 moves in the arrow D direction in FIG. 3 along the cam groove 16c.

On the other hand, in FIG. 7, an upper die 26 is arranged above the fixed die 12 so as to be vertically movable. A slide cam 30 is attached to the lower end of the upper die 26 via an adapter 28, and the slide cam 30 is supported slidably with respect to the adapter 28 in the directions of arrows E and F in the drawing. The slide cam 30 is constantly urged in the direction of arrow E with respect to the adapter 28 by a spring (not shown), and the positional relationship between the slide cam 30 and the adapter 28 is as shown in FIG. It is in the state as shown.

A male die portion 30 a that abuts the recess 16 a of the rotary die 16 via the work W is formed at the left end portion of the slide cam 30. The tip portion W1 of the work W is bent by being sandwiched between the concave portion 16a and the male die portion 30a so as to have a shape following the concave portion 16a. A presser member 34 is disposed between the upper surface 12a of the fixed die 12 and the lower surface of the upper die 26 via a compression spring 32, and the lower surface 34a of the presser member 34 has a lower surface 34a. It is formed in a shape corresponding to the non-processed portion W2. Therefore, the work W does not move with respect to the fixed mold 12 while being sandwiched between the upper surface 12a of the fixed mold 12 and the lower surface 34a of the presser member 34 during the molding process shown in FIG. Held in.

Next, returning to FIGS. 1 and 3, the fixed mold is omitted in FIGS. 1 and 3, and only the rotary molds 16 and 36 are shown. As described above, the forming apparatus of this embodiment is used for forming a work W having a bent portion W3 such as a side frame of a vehicle body of an automobile, and the bent portion W3. Since the forming process is continuously performed in the front and rear, the two rotary molds 16 and 36 are arranged with the bent portion W3 as a boundary. The structure of the rotary die 36, that is, the cross section DD in FIGS. 1 and 3 is exactly the same as that in FIG. 7. However, in FIGS. 3 and 4, since the cam groove 36a of the rotary die 36 is tilted in the opposite direction to the cam groove 16c of the rotary die 16 (rightward in the drawings), the rotary die 36 is When rotating in the same direction, the rotary die 36 slides in the direction of arrow G, and the rotary die 16 and the rotary die 36 slide in directions away from each other.

Next, the operation of the molding apparatus configured as described above will be described with reference to FIGS. 5 to 7. First, the upper mold 26 is lifted by a driving device (not shown) and allowed to escape above the fixed mold 12 as shown in FIG. Then, in this state, the work W is placed on the upper surface 12a of the fixed mold 12 as illustrated. In this state, the wear plate 18 is pushed upward by the urging force of the return pin 22, and the rotary die 16 is rotating in the counterclockwise direction as shown in the drawing. This also applies to the rotary die 36. Then, in this state, the roller 24a of the cam follower 24 is engaged with the upper end portion 16c1 of the cam groove 16c of the rotary die 16, so that the rotary die 16 slides in the direction of arrow D in FIG. 8 and FIG. 9 which is a view of FIG. 8 viewed from below. Similarly, the rotary die 36 also slides in the direction of arrow G in FIG. 3 and is in the state shown in FIGS. 8 and 9. That is, the tips of the rotary dies 16 and 36 are in a state of being separated from each other. At this time, the sliding amounts of the rotary mold 16 and the rotary mold 36 are both 20 mm. As a result, in the state shown in FIGS. 8 and 9, the two rotary molds 16 and 36 are separated by about 40 mm. ing.

Next, when the upper die 26 is lowered from this state, the lower surface 34a of the presser member 34 first comes into contact with the non-processed portion W2 of the work W from above, and the work W is placed on the upper surface of the fixed die 12. Hold on 12a. . At the same time, the lower end surface of the slide cam 30 contacts the wear plate 18 from above, and pushes down the wear plate 18 against the upward biasing force of the return pin 22. As shown in FIG. The lower surface 18a of the plate 18 is pressed against the upper surface 12c of the fixed mold 12. Along with this, the rotary mold 16 rotates clockwise in FIG. With the rotation operation of the rotary die 16, the roller 24a of the cam follower 24 engages with the lower end portion 16c2 of the cam groove 16c from the state of engaging with the upper end portion 16c1 of the cam groove 16c of the rotary die 16. As a result, the rotary die 16 moves from the position shown in FIGS. 8 and 9 in the direction of arrow H to the position shown in FIG. Similarly, the rotary die 36 also slides in the direction of arrow I in FIGS. 8 and 9 and moves to the position shown in FIG. That is, the tips of the rotary molds 16 and 36 are in contact with each other.

When the upper die 26 is further lowered from this state, the slide cam 30 and the adapter 28 slide with each other, and the slide cam 30 slides along the upper surface of the wear plate 18 in the arrow J direction. . Then, as shown in FIG. 7, the male die portion 30a presses the tip end portion W1 of the work W against the concave portion 16a of the rotary die 16 to form the work W. The same molding process is performed on the rotary mold 36.

The forming operation of the work W is completed by the series of operations described above. Next, the operation of removing the work W will be described. First, the upper die 26 is moved upward from the state shown in FIG. 7 to the state shown in FIG. In this state, the convex portion 16d of the rotary die 16 is located above the tip portion W1 of the molded work W, and therefore the workpiece W cannot be removed upward from the fixed die 12. Further, since the work W is pressed onto the fixed mold 12 by the presser member 34, the work W cannot be removed.

When the upper die 26 is further retracted from this state, the presser member 34 separates from the upper surface of the work W as shown in FIG. 5, and the rotary die 16 rotates counterclockwise. Since the convex portion 16d retracts to the left from the position immediately above the tip W1 of the work W, the work W can be taken out upward. The same applies to the rotary die 36. Then, when the rotary dies 16 and 36 rotate from the state shown in FIG. 6 to the state shown in FIG. 5, the rotary die 16 and the rotary die 36 have cam grooves formed in these rotary dies, The cam follower fixed to the fixed die slides so as to separate from each other as shown by arrows D and G in FIG. 3, so that the rotary die 16 and the rotary die 36 do not interfere with each other and the rotation is prevented. It will be possible.

As described above, according to the molding apparatus of the embodiment, the two rotary molds are in contact with each other at the time of actually performing the molding processing, and when the molding is completed and the return rotation is performed. Since they are separated from each other, it is possible to improve the forming shape accuracy at the connecting portion of the two rotary molds while allowing the work piece to be removed upward. The present invention can be applied to modifications and variations of the above embodiments without departing from the spirit of the invention.

[0024]

[Effect of device]

 As described above, according to the molding processing device of the present invention, when the pair of cylindrical rotary molds are rotated again, by providing the moving means for moving these cylindrical molds in the directions away from each other, Even if a pair of cylindrical molds are sometimes in close contact with each other, after the molding is completed, these cylindrical molds can rotate while separating from each other, so during molding, the two cylindrical molds are in close contact with each other during the molding process. Therefore, the work can be formed into an accurate shape even at the two columnar connection portions.

[Brief description of drawings]

FIG. 1 is a diagram showing a state in which a molding processing apparatus according to an embodiment is applied to processing an edge portion of a side frame of a vehicle body of an automobile as a work W.

FIG. 2 is a sectional view taken along line CC of FIG.

3 is a partially enlarged view of FIG.

FIG. 4 is a view on arrow AA of FIG.

5 is a cross-sectional view taken along the line BB of FIG. 3, showing a procedure for forming the work W. FIG.

6 is a cross-sectional view taken along line BB of FIG. 3, showing a procedure for forming the work W. FIG.

FIG. 7 is a cross-sectional view taken along the line BB of FIG. 3, showing a procedure for forming the work W.

FIG. 8 is a diagram showing a state in which two rotary dies are separated from each other.

9 is a diagram of FIG. 8 viewed from below.

FIG. 10 is a diagram showing a structure of a conventional molding apparatus.

FIG. 11 is a view showing an arrangement state of a rotary die when a work having a bent portion is formed.

FIG. 12 is a diagram for explaining a problem of a conventional rotary type.

FIG. 13 is a diagram for explaining a problem of a conventional rotary type.

[Explanation of symbols]

 10 Molding device 12 Fixed type 14 Fitting hole 16,36 Rotating type 18 Wear plate 20 Compression spring 22 Return pin 24 Cam follower 26 Upper die 28 Adapter 30 Slide cam 32 Compression spring 34 Presser member 50, 52 Rotating type

Claims (2)

[Scope of utility model registration request] 1. A fixed mold, and a pair of cylindrical rotary molds, which are arranged in the fixed mold with a part thereof exposed to the outside of the fixed mold, and arranged at a predetermined angle with respect to each other. And a moving device that moves the pair of columnar molds in a direction away from each other when the pair of columnar rotary molds makes a return rotation. 2. The moving means comprises an oblique groove provided in the pair of cylindrical rotary molds, and a fixing pin provided in the fixed mold and fitted in the oblique groove. The molding processing apparatus according to claim 1.