JP5835068B2 - Swing forging device - Google Patents

Description

  The present invention relates to an oscillating forging device that performs forging by oscillating, and constrains rotation of a spindle to enable accurate transfer of a product shape.

  As a conventional swing forging device, there is a swing forging press according to Patent Document 1. In this conventional press machine, a spindle B is slidably mounted inside the spindle head A, and a workpiece table C is provided so as to be able to approach and separate from the spindle head while rotating the spindle B while oscillating and rotating. The forging is performed by pressing the workpiece with the forming tool D attached to the lower end of the spindle.

  In such a conventional rocking forging device, a constant velocity joint structure is employed for rocking the spindle B. However, this constant velocity joint structure is complicated and requires a dedicated design according to the shaft diameter.

  Further, the tip of the spindle is a hemispherical portion, and the periphery of the hemispherical portion is fitted into a semicircular guide surface E formed on the spindle head so as to be swingable. Such a hemispherical portion of the spindle and a semicircular guide surface of the spindle head are also difficult to manufacture and costly. Furthermore, there is a problem that it is difficult to increase the speed of such swinging along the hemispherical sliding surface.

Japanese Patent Laid-Open No. 4-200947

  The present invention has been made in view of the above problems, and its object is to provide a simple and low-cost structure with four bearings without adopting a complicated constant velocity joint structure or a hemispherical sliding structure. It is an object of the present invention to provide a swing forging device that can realize a dynamic motion and can also swing at high speed.

The present invention provides a swing forging device according to each of the claims as a means for solving the above-mentioned problems.
The swing forging device according to claim 1 is rotatably supported by a base body (1), and is connected to a joint body (21) connected to a drive source, and a main body coupled to the joint body (21). A spindle (23), a spindle (31) which is disposed in an inclined manner in the main spindle (23), and swings as the main spindle (23) rotates, and is attached to the lower end of the spindle (31) was have a punch body (6), wherein the a rotating restraining mechanism for restraining rotation of accompanying the spindle rotation (31) of the main spindle (23) (5), the rotation A restraining mechanism (5) is attached to a lower end of a case portion (42) that rotatably accommodates the main spindle (23) on the spindle side, and the rotation restraining mechanism (5) An inner ring member (51) that rotatably supports the handle (31) around the X axis, and an outer ring member (51) disposed outside the inner ring member (51) so that the inner ring member (51) can rotate around the Y axis. It comprises an outer ring member (52) to be supported and a moving structure (7) that enables the rotational restraint mechanism (5) to move in parallel in the X-axis direction and the Y-axis direction.

  As a result, the main spindle (23) rotates at a high speed, but the spindle (31) in the main spindle (23) itself is not rotated by the rotation restraining mechanism (5), so that the product shape is accurately transferred by the punch body 6. Can do. In the present invention, since the constant velocity joint structure and the hemispherical sliding surface structure are not adopted, the cost of the apparatus can be reduced.

In the swing forging device according to claim 1, when the rotation restricting mechanism (5) is attached to the shaft (spindle) side, the rotation restricting mechanism is not on the same plane as the swing point P. In addition to rotation around the axis, a structure that enables translational movement of the X and Y axes is required.

In the swing forging device according to claim 2 , the moving structure (7) is slidably fitted to the U-shaped member (71) and the vertical part (72a) attached to the spindle (31). The left and right lateral parts (72b, 72c) are defined by a T-shaped member (72) connected to the frame body (50) via the bellows (73). Thereby, the rotation restraint mechanism can move in the Y-axis direction that is the sliding direction and the X-axis direction that is the expansion and contraction direction of the bellows.

Swing forging according to claim 3, the rotation restraining mechanism (5) is obtained by the attaching to the die set side, the rotation restraining mechanism (5) rotatably supports the spindle (31) in the X-axis An inner ring member (51), an outer ring member (52) disposed outside the inner ring member and rotatably supporting the inner ring member around the Y axis, and a frame for attaching the rotation restraint mechanism to the die set side It is defined that it is composed of a body (50). Thus, when the rotation restraint mechanism is attached to the die set side, since the rotation restraint mechanism is on the same plane as the swing point P, there is no need for a structure that can translate the X and Y axes. And only a structure that allows only rotation around the Y axis is sufficient.

  In addition, the code | symbol in the parenthesis attached | subjected to each said means is an example which shows the specific means as described in the Example mentioned later.

It is a longitudinal cross-sectional view of the rocking forge device which is an Example of this invention. It is a conceptual diagram of the rotation restraint mechanism attached to the rocking forge device of this invention. It is a figure which shows the moving structure which enables the parallel movement to the X-axis and Y-axis direction of a rotation restraint mechanism. It is a figure which shows the case where a rotation restraint mechanism is attached to the shaft side (a), and the case where it attaches to the die set side (b). It is comparison explanatory drawing of the conventional rocking machine and the rocking machine of this invention. It is a figure which shows the conventional rocking forge press machine.

〔Example〕
Hereinafter, a swing forging device according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a longitudinal sectional view of a rocking forging device 100 according to an embodiment of the present invention. The swing forging device 100 basically includes a base body 1, an outer rotary body 2 rotatably supported by the base body 1 and rotated by an external driving source, and the outer rotary body 2. An inner oscillating rotating body 3 that is disposed inside and that oscillates, a case body 4 that is provided below the base body 1 so as to surround the outer rotating body 2, and an inner oscillating rotation. The rotation restraining mechanism 5 is provided at the lower part of the body 3 and restrains the rotation of the inner rocking rotator 3, and the punch body 6 attached to the lower surface of the inner rocking rotator 3. The base body 1 is supported on the base by a pole 8.

  The base body 1 is formed with a through hole 1a having a stepped structure for penetrating the outer rotating body 2, and a lower body 12 is provided with a lid body 12 covering the through hole 1a. The outer rotating body 2 is thrust-supported so that the outer rotating body 2 is sandwiched between the upper thrust bearing 13 and the lower thrust bearing 14 with the lid 12 interposed therebetween. The outer rotating body 2 is rotatably supported by a bearing 1 disposed in the through hole 1a.

  The outer rotating body 2 includes a joint body 21, an intermediate body 22, and a main spindle 23, which are connected in this order by a fixing tool such as a bolt. The upper end of the joint body 21 protrudes from the upper surface of the base body 1, and a pulley 24 is attached here. A belt (not shown) is stretched around the pulley 24 and connected to an external drive source. Therefore, the outer rotating body 2 is rotationally driven by the external drive source.

  The lower end portion 21a of the joint body 21 has a large outer diameter, and a cylindrical space 21b is formed on the lower surface thereof. The intermediate body 22 connected to the lower surface of the joint body 21 is formed in a cylindrical shape having a support portion 22a that supports an inner rocking rotator 3 to be described later while being inclined with respect to the central axis L of the outer rotator 2. Yes. The support portion 22a also covers the space 21b when the intermediate body 22 is connected to the joint body 21.

  The lower surface of the intermediate body 22 is connected to the main spindle 23. The main spindle 23 is formed in a cylindrical shape and is rotatably supported in a case body 4 described later. Thus, the outer rotating body 2 integrated with the joint body 21, the intermediate body 22, and the main spindle 23 is configured to rotate by an external driving source. As will be described later, the inner peripheral surface 23a of the main spindle 23 is arranged inside with the spindle 31 tilted, so that the center axis M of the spindle 31 tilted is not the center axis L of the outer rotating body 2. It is formed in a cylindrical shape at the center.

  The case body 4 includes a flange portion 41 and a case portion 42. The flange portion 41 and the case portion 42 are formed in a cylindrical shape and are connected by a fastener such as a bolt. The case body 4 covers the outer periphery of the outer rotator 2, and a first radial bearing 43 is provided between the inner peripheral surface of the case portion 42 and the outer peripheral surface of the main spindle 23 of the outer rotator 2. The main spindle 23 is rotatably supported.

  The tip 31 of the spindle 31 that is the inner oscillating rotating body 3 is housed in a space 21 b formed at the lower end of the joint body 21, and the central axis of the outer rotating body 2 is supported by the support 22 a of the intermediate body 22. Inclined to L and supported. A thrust bearing 15 is provided between the intermediate body 22 and the spindle 31.

  Of course, the spindle 31 is also disposed in the main spindle 23 in an inclined state with respect to the axis L of the main spindle 23, and the first spindle 31 is disposed between the outer peripheral surface 31 a of the spindle 31 and the inner peripheral surface 23 a of the main spindle 23. Two radial bearings 44 are interposed.

  A recess 31b is formed on the lower end surface of the spindle 31, and both are fixed so that the protrusion 6a of the punch body 6 is fitted into the recess 31b. Thus, when the outer rotating body 2 rotates, the spindle 31 which is the inner rotating body 3 performs a swinging motion, and the swinging point P (spindle tilt center) of the punch body 6 swings. The swing point P is also an intersection point P between the central axis L of the outer rotating body 2 and the inclined central axis M of the inner rotating body (spindle) 3 disposed to be inclined with respect to the axis L.

  However, in this state, the spindle 31 itself also rotates, and the product shape cannot be accurately transferred. Therefore, it is necessary to restrain the rotation. Therefore, in the present invention, the rotation restraining mechanism 5 is provided to restrain the rotation of the spindle 31 itself.

  The rotation restraint mechanism 5 is attached to the lower surface of the case body 4 when attached to the shaft side of FIG. FIG. 2 shows the concept of the rotation restraint mechanism 5. The spindle 31 is provided with an X-axis body 31 a that protrudes left and right in FIG. 2 in the X-axis direction. These X-axis bodies 31 a are attached to an inner ring member 51 disposed outside the spindle 31 by a bearing 53. It is pivotally supported so that it can rotate around the X axis (A axis). Further, the inner ring member 51 is also provided with a Y-axis body 51b that protrudes up and down in FIG. 2 in the Y-axis direction from the outer peripheral surface thereof, and these Y-axis bodies 51b are disposed outside the inner ring member 51. The outer ring member 52 is pivotally supported by a bearing 54 so as to be rotatable around the Y axis (B axis). The rotation of the spindle 31 is constrained by the rotation constraining mechanism 5 configured as described above.

As shown in FIG. 4, such a rotation restraint mechanism 5 can be considered to be attached to the shaft side (a) or attached to the die set side (b).
When the rotation restricting mechanism 5 is attached to the (a) shaft side, the rotation restricting mechanism 5 is attached to the lower surface of the case body 4 as described above. In this case, since the swing point P of the punch body 6 and the rotation restraint mechanism 5 are not on the same plane, in addition to rotation around the X and Y axes (referred to as A and B axes), translation of the X and Y axes. It is necessary to have a structure (four-axis structure of X, Y, A, and B axes) that enables movement.

  That is, for the moving structure 7 that enables parallel movement in the X-axis and Y-axis directions, the rotation restraint mechanism 5 including the inner ring member 51 and the outer ring member 52 is provided as shown in the conceptual diagram of FIG. The frame 50 may be grounded so as to be slidable in the X-axis and Y-axis directions.

  FIG. 3 shows a specific example of the moving structure 7. A U-shaped member 71 is fixed to the outer surface of the spindle 31 so as to face the Y-axis direction. A vertical portion 72a of a T-shaped member 72 is slidably inserted into the U-shaped portion of the U-shaped member 71 in cross section. The left and right lateral portions 72b and 72c of the T-shaped member 72 are attached to the left and right frame bodies 50 via bellows 73, respectively. Such a structure 7 is provided on the opposite side of the spindle 31. Thereby, the rotation restraint mechanism 5 can be translated in the X-axis and Y-axis directions.

  As shown in FIG. 4B, when the rotation restricting mechanism 5 is mounted on the die set side, the swing point P of the punch body 6 is on the same plane as the rotation restricting mechanism 5, so that the X and Y axes Only a structure (a biaxial structure of A and B axes) that can rotate around (A and B axes) is sufficient. That is, the outer ring member 52 of the rotation restraint mechanism 5 may be fixed to the frame body 50 on the die set side.

  FIG. 5 is a diagram illustrating a comparison between a conventional oscillating machine and an oscillating machine having a biaxial tilt rotation mechanism of the present invention. That is, the conventional rocking machine has one set of bearings, whereas the present invention has two sets. Further, while it is difficult to increase the speed of the conventional rocking machine, the present invention is not so difficult. Further, while it is difficult to manufacture a spherical sliding surface with a conventional rocking machine, the present invention does not require a spherical sliding surface and is easy to manufacture.

DESCRIPTION OF SYMBOLS 1 Base body 12 Cover body 2 Outer rotating body 21 Joint body 22 Intermediate body 23 Main spindle 3 Inner rocking rotating body 31 Spindle 4 Case body 41 Flange part 42 Case part 5 Rotation restraint mechanism 51 Inner ring member 52 Outer ring member 6 Punch Body 7 Moving structure 71 U-shaped member in cross section 72 T-shaped member 73 Bellows L Center axis of outer rotating body M Center axis of inclined inner rotating body P Pivoting point

Claims (3)

A swing forging device that performs forging by swinging the punch,
A joint body (21) rotatably supported by the base body (1) and connected to a drive source;
A main spindle (23) connected to the joint body (21);
A spindle (31) disposed in an inclined manner in the main spindle (23) and performing a swinging motion in accordance with the rotation of the main spindle (23);
A punch body (6) attached to the lower end of the spindle (31);
Have
A rotation restraining mechanism (5) for restraining the rotation of the spindle (31) accompanying the rotation of the main spindle (23) ;
The rotation restraining mechanism (5) is attached to a lower end of a case portion (42) that rotatably accommodates the main spindle (23) on the spindle side,
The rotation restraining mechanism (5) is disposed outside the inner ring member (51) and the inner ring member (51) for rotatably supporting the spindle (31) around the X axis. 51) an outer ring member (52) that rotatably supports the Y axis, and a moving structure (7) that enables the rotation restraint mechanism (5) to move in parallel in the X axis direction and the Y axis direction. An oscillating forging device comprising: The moving structure (7) has a U-shaped member (71) attached to the spindle (31) and a T-shape in which a vertical part (72a) is slidably fitted to the U-shaped member (71). The T-shaped member (72), wherein the left and right lateral portions (72b, 72c) of the T-shaped member are connected to the frame (50) via the bellows (73); The swing forging device according to claim 1 , wherein the swing forging device is configured. A swing forging device that performs forging by swinging the punch,
A joint body (21) rotatably supported by the base body (1) and connected to a drive source;
A main spindle (23) connected to the joint body (21);
A spindle (31) disposed in an inclined manner in the main spindle (23) and performing a swinging motion in accordance with the rotation of the main spindle (23);
A punch body (6) attached to the lower end of the spindle (31);
Have
A rotation restraining mechanism (5) for restraining the rotation of the spindle (31) accompanying the rotation of the main spindle (23);
The rotation restraint mechanism (5) is attached to the die set side,
The rotation restraining mechanism (5) is disposed outside the inner ring member (51) and the inner ring member (51) for rotatably supporting the spindle (31) around the X axis. 51) An outer ring member (52) for rotatably supporting the Y axis and a frame (50) for attaching the rotation restraining mechanism (5) to the die set side. Dynamic forging equipment.

Images