JPH0481300A - Ball type suspension point structure in press machine - Google Patents

Abstract

PURPOSE:To stably execute high accurate pressing work by transmitting rotating force of a worm wheel to an adjusting screw shaft at the time of adjusting a slide and arranging mechanism, which a connecting rod and the adjusting screw shaft are made to be impossible to relatively rotate during operating the press. CONSTITUTION:At the time of adjusting the slide position, a pin 4 is projected with pin projecting means 10 to connect the worn wheel 8 and the adjusting screw shaft 2. Then, at the time of rotating the worm wheel 8, the adjusting screw shaft 2 is rotated through the pin 4 and position toward vertical. direction to the connecting rod 1 in the slide 7 can be adjusted. When this adjustment completes, the connecting rod 1 and the adjusting screw shaft 2 are integrally connected as impossible to relatively rotate with fixed means 3o, and also the pin 4 is drawn into a ball 3 with pin embedding means 20 and connection of the worm wheel 8 and the ball 3, i.e., the adjusting screw shaft 2 is released and both are separated. By this method, the high accurate press forming is stably executed with an accurate die height.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a ball suspension point structure for a press machine.

"Prior Art" A connecting rod and a slide of a press machine are connected via a suspension point structure. It is well known that this suspension point structure can be roughly divided into a ball type and a squirrel-pin type, and the ball type is widely adopted due to its advantages such as small size, low cost, and less deflection.

Such a ball suspension point structure is shown in FIG.

In FIG. 2, an adjustment screw shaft 2 or screws la and 2a are screwed together and attached to the connecting rod 1.
A ball 3 is fixed to the lower end of the adjusting screw shaft 2.

On the other hand, a ball cup 5 is attached to a slide 7 that is slidably guided by a column or the like so as to be movable up and down. In addition, 7
a is a cylindrical body integrated with the slide 7; A-me wheel 8;
7b is a slide component that transmits the vertical movement of the ball 3 to the slide 7, and 6 is a hydraulic chamber forming an overload safety device.

Here, the connecting rod 1 and the slide 7 are spherical bearings formed by the ball 3 and the ball cup 5! I4
Since they are connected through a point structure, the slide 7 can be moved linearly in the vertical direction by the swinging movement of the connecting rod 1.

By the way, in a press machine, it is necessary to accurately adjust the distance between the holster and the slide 7 depending on the mold used, etc., so the worm wheel 8 is rotated by a worm screw on the cylindrical body 7a of the slide 7. On the other hand, a pin 4 extending in the radial direction is attached to the ball 3,
This pin 4 is inserted into the vertical groove 8a of the worm wheel 8, and the two are connected to each other so that they can rotate synchronously.

Therefore, when the worm screw 9 is rotated automatically or manually, the worm wheel 8 is rotated.

This rotation is caused by the ball 3, that is, the adjustment screw shaft 2, via the pin 4.
transmitted to. Then, the connecting rod 1 (female thread 1.a) and adjustment screw shaft 2 (male thread 2a) rotate relative to each other, so move the slide 7 vertically with respect to the connecting rod 1 connected to the crankshaft, and remove the tie hide. You can increase or decrease the amount.

Thereafter, when the crankshaft is rotated, the connecting rod 1 is oscillated around the ball 3, thereby making it possible to stroke the slide 7 in the vertical direction to press-form a predetermined product using the adjusted tiehide.

As described above, die-hide adjustment is essential for molding products with a predetermined precision, and is also important for preventing mold breakage, etc. Therefore, the worm screw 9 is A number of so-called automatic die-hide adjustment devices have been proposed that quantitatively control rotation, and the number of contradictions to actual equipment is increasing.

[Problem to be solved by the invention] However, no matter how sophisticated and precise the automatic die-hide adjustment device is electrically and electronically, there is still a possibility that there will be play in the mechanical elements that are to be controlled, especially in the structure of suspension point 1. If there is a change in displacement, its effectiveness cannot be guaranteed.

In other words, the ball type suspension points mentioned above! II
According to I-Zukuri, when the axis Z of the pin 4 passing through the center of the ball 3 shown in FIG. 2 becomes the center of swing of the connecting rod 1 as shown in FIG. There is no problem if the tongue 4-3 is perpendicular to the swinging direction as shown in FIG. In addition, as shown in Fig. 4, the axis Z
When the connecting rod 1 swings in the same direction as the connecting rod 1, when the pin 4-4 matches the swing direction as shown in FIG. 5, the pin 4-4 swings vertically. This vertical swing is absorbed within the vertical groove 8a, so there is no problem.

However, if the direction of the pin 4 is not perpendicular to or in the same direction as the swinging direction of the connecting rod 1, as shown by the dotted line in FIG. Moves in a two-dimensional manner. This two-dimensional movement can be broken down into a longitudinal component and a lateral component. Then, the longitudinal component force is absorbed within m M 8 a as described above, or the lateral component force becomes a force that attempts to rotate the worm wheel 8. However, the worm wheel 8
Since the worm screw 9 is locked, it cannot be rotated 6. As a result, the adjustment screw 2 rotates and the slide 7 is moved up and down.

In this way, the oscillating movement of the connecting rod 1 ('
The f-shaped pin 4 moves in a two-dimensional direction, and its momentum displacement is also changed by the swing angle of the connecting rod 1.

Moreover, the direction of swinging of the connecting rod 1 may not change due to the structure of the press machine, but the relative direction of the axis Z of the pin 4 to it changes every time the worm gear 9 rotates the worm wheel 8 to adjust the tie-hide. There is almost no chance that this will happen.

Otherwise, no matter how accurately you adjust the tie-hide, the position of the slide 7 will change up or down depending on the direction of the axis Z (pin 4) with respect to the swinging direction of the connecting rod 1 at the end of the adjustment. Therefore, there is a problem that high-precision press molding using a set die-hide cannot be performed.

Here, an object of the present invention is to avoid generating a force to rotate the worm wheel based on the two-dimensional movement of the pin that causes a change in the slide position regardless of the orientation of the pin at the end of the slide adjustment. To provide a ball-type suspension point structure for a press machine that can stably perform high-precision press forming under an accurate die-hide.

[Means for Solving the Problems] The present invention has a configuration in which the worm wheel and the adjusting screw shaft are connected via a pin when adjusting the sliding position W, and the worm wheel and the adjusting screw shaft are separated during press operation, This achieves the above objective.

Specifically, the present invention provides a ball attached to the lower end of an adjusting screw shaft screwed onto a connecting rod, a ball cup attached to the slide side, and a worm wheel for transmitting rotation of the worm wheel to the adjusting screw shaft. In a ball-type suspension point structure of a press machine formed including a pin attached to a ball, the pin is attached to the ball so as to be freely retractable, a pin protruding means for protruding the pin in the radial direction of the ball, and a pin protruding means for protruding the pin in the radial direction of the ball; and fixing means for fixing the connecting rod and the adjustment screw shaft so that they can rotate relative to each other, and when adjusting the slide, the fixing means is released and the pin is protruded, so that the pin embeds in the worm. The rotational force of the wheel can be transmitted to the adjusting screw shaft, and during press operation, the pin is buried to release the engagement between the worm wheel and the adjusting screw shaft, and the fixing means is operated to connect the connecting rod and the adjusting screw shaft. It is characterized by being configured so that they can be integrally connected so that they cannot rotate relative to each other.

[Function] According to the present invention, when adjusting the slide position, the pin protruding means protrudes the pin to connect the worm wheel and the adjustment screw shaft. If you do not do this and rotate the worm wheel, the adjustment screw shaft will be rotated through the pin,
The vertical position of the slide relative to the connecting rod can be adjusted.

On the other hand, when this adjustment is not completed, the connecting rod and the adjusting screw shaft 2 are integrally connected to each other by the fixing means so that they cannot rotate relative to each other, and the pin is retracted into the ball by the pin embedding means, so that the connecting rod and the ball are connected to each other. 6. Break the connection with the adjustment screw shaft, that is, separate the two.

Therefore, regardless of the orientation of the pin, no rotational force is generated due to the two-dimensional movement of the pin, which is directly linked to a change in the position of the worm wheel, that is, the slide on which the worm wheel is attached, based on the swinging movement of the connecting rod. Further, since the adjusting screw shaft and the connecting rod are integrally formed by the fixing means, there is no possibility of relative position change due to loosening between the two.

Therefore, high-precision press molding can be stably performed with accurate die-hydride.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

In this embodiment, as shown in FIG. 1, the pin 4 is attached to the ball 3 so as to be freely retractable, and the ball-type suspension point structure is provided with a pin protruding means 10, a pin embedding means 20, and a fixing means 30, and the slide fIj ] During alignment, the fixing means 30 is released and the pin 4 is protruded so that the rotational force of the worm wheel 8 can be transmitted to the adjustment screw shaft 2. During press operation, the pin 4 is buried and the worm wheel 8 and adjustment screw are connected. By releasing the engagement with the shaft 2 and operating the fixing means 30, the connecting rod 1 and the adjustment screw shaft 2 can be integrally connected in a manner that they cannot rotate relative to each other.

In addition, ball type suspension point structure (1, 2
, 3, 5, etc.) are the same as the conventional structure shown in FIG. 2, so the same or common parts are given the same reference numerals and their explanations will be omitted.

In FIG. 1, the pin 4 is aligned with the axis Z passing through the center of the ball 3.
The ball 3 is fitted into a small diameter hole 3a along the radial direction of the ball 3, that is, the vertical groove 8a of the worm wheel 8.

That is, a support shaft 12 fixed with a screw is provided in the large diameter hole 3b of the ball 3, and a pin 4 is slidably mounted on the support shaft 12 and the inner surface of the small diameter hole 3a.

Now, the pin protruding means 10 is connected to the support shaft 12 with the support shaft 12.
The spring 1 consists of a spring 13 fitted into the pin 2 and a collar body 11 (also used as a piston, which will be described later) fixed to one end of the pin 4.
Is pin 4 vertical due to the urging force of 3? It can be made to protrude into the fli S a. Note that this means 10 can be configured and implemented using a hydraulic type or the like.

On the other hand, the pin burying means 20 is a means for burying the pin 4 into the small diameter hole 3a inside the ball 3 against the biasing force of the spring 13. Here, burying the pin 4 means burying the pin 4 and the worm so that the lateral component force based on the two-dimensional movement of the pin 4 due to the rocking movement of the connecting rod 1 is not transmitted to the worm wheel 8. This means separating the unit from the wheel 8.

In this embodiment, an oil passage 21 . Oil passage 22 opened in ball cup 5. A pin embedding means 20 is formed by a cylinder chamber formed by a large diameter hole 3b in an oil passage 23 formed in the ball 3 itself, a piston (11), and a hydraulic pressure supply source (not shown). That is, by supplying hydraulic pressure to the shrink chamber (3b), the pin 4 is moved against the urging force of the spring 13 to move the ball 3 (
3a).

Next, the fixing means 30 is a means for physically fixing the connecting rod 1 and the adjustment screw shaft 2 so that they cannot rotate relative to each other, and includes a nut member 31 having a female thread 31a and a nut member 31 having a female thread 31a.
- Consists of a case body 32 that fits the member 31 and forms a hydraulic chamber 34, and by applying a predetermined hydraulic pressure from the oil 133 to the hydraulic chamber 34, the adjusting screw shaft 2 is connected to the connecting rod 1 via the nut member 31. It is configured as a so-called double nut method of fixing. Of course, the top end portion of the case body 32 is fixed to the connecting rod 1 by the pin 1-35.

Next, the operation of this embodiment will be explained.

(Tie High I - Adjustment Work) The hydraulic pressure is removed to release the fixing means 30, and the connecting rod 1 and the adjusting screw shaft 2 are allowed to rotate relative to each other.

At the same time or before or after this, the hydraulic pressure is withdrawn from the pin embedding means 20. Then, the pin 4 is pushed out by the biasing force of the spring 13 of the pin protruding means 10, and the pin 4 is pushed into the ball 3 (
3a,) to protrude from inside n M S a, and ball 3
and the worm wheel 8 are connected.

Here, the worm gear 9 is rotated automatically or manually to rotate the worm wheel 8.

Then, the rotational force of the worm wheel 8 is transmitted to the ball 3, that is, the adjustment screw shaft 2, via the vertical groove 8a and the pin 4.

Therefore, the adjusting screw shaft 2 rotates via the screws la and 2b and is displaced relative to the connecting rod 1 in the vertical direction in FIG. 1. In other words, the position of the slide 7 relative to the connecting rod 1 can be adjusted.

In this way, after the die-hide adjustment is completed, the fixing means 30 is operated to make both 1 and 2 unable to rotate relative to each other.
At the same time, the pin embedding means 20 is operated to pull the pin 4 against the biasing force of the spring 13 and embed it in the ball 3 (3a). At this point, the engagement between the wheel wheel 8 and the ball 3 is released. In other words, it becomes standby for press operation.

(Press operation) When the crankshaft is driven, it swings around the connecting rod 1 or ball 3.

Then, the worm wheel 8. The vertical movement force is transmitted to the slide 7 via the slide component 7b, and the slide 7 performs a stroke motion in the vertical direction.

At this time, ball 3 is placed in ball cup 5. Either the pin 4 is reciprocatingly rotated and slid against the worm wheel 8, or the pin 4 is already embedded in the ball 3.

Therefore, regardless of the rotation angle of the worm wheel 8 stopped at the end of the slide position adjustment, that is, the orientation of the pin 4 with respect to the rocking direction of the connecting rod 1, the rotation angle of the worm wheel 8 based on the rocking motion of the connecting rod 1 is determined. The lateral force through the pin 4 is not generated. Furthermore, the adjusting screw shaft 2 and the connecting head 1 are integrally connected by a fixing means 30.

Therefore, the previously adjusted tiehide is maintained accurately.

According to this embodiment, the pin 4 is attached to the ball 3 in a protrusive and retractable manner, and the pin protruding means 10 and the pin burying means 20
and a fixing means 30 are provided to connect the worm wheel 8 and the ball 3 (adjustment screw shaft 2) via the pin 4 when adjusting the position of the slide 7 (tie-hide adjustment), while during press operation, the worm wheel 8 is connected to the ball 3 (adjustment screw shaft 2). Since the configuration is such that the engagement between the pin 4 and the ball can be released, no matter what the orientation of the pin 4 with respect to the connecting rod 1, the pin 4 that moves two-dimensionally during press operation can be No force is generated to rotate the adjustment screw shaft 2 due to engagement with the worm wheel 8. Therefore, the setting tie-high 1~ can be held accurately and high-precision machining can be performed stably.

Furthermore, after the tie-hide adjustment, the connecting rod 1 and the adjustment screw shaft 2 are integrally and fixedly connected by the fixing means 30 so that they cannot rotate relative to each other, so the pin 4 is buried and the ball 3 and the worm wheel 8 are connected. Even if the engagement is released, the adjustment screw shaft 2 does not rotate relative to the connecting rod 1, and the tie hide can be held more reliably.

Further, the pin protruding means 10 causes the pin 4 to protrude due to the urging force of the spring 13, and the pin burying means 20 causes the pin 4 to protrude due to the urging force of the spring 13.
By using the hydraulic pressure applied during press operation, pin 4 can be pulled in during press operation.
Since the pin 4 can be completely prevented from being protruded, and the pin 4 can be automatically projected by the biasing force of the spring 3 when the slide position is adjusted, the adjustment work of the slide position Km can be performed automatically and quickly.

Further, since the fixing means 30 is also of a hydraulic type, the relative positions of both 1 and 2 can be reliably fixed during the press operation by using the hydraulic pressure applied during the press operation.

[Effects of the Invention] According to the present invention, the pin is mounted on the ball so as to be protrusive and retractable, the pin protruding means, the pin embedding means, and the adjusting screw shaft fixing means are provided, and the fixing means is released when the slide is exhausted. A pin is protruded so that the rotational force of the worm wheel can be transmitted to the adjusting screw shaft, and during press operation, the pin is buried to disengage the worm wheel and the adjusting screw shaft, and the fixing means is operated: Since the connecting rod and the adjustment screw shaft can be integrally connected in a non-rotatable manner, no matter what direction the pin is in when the tie-hide adjustment is completed or in any direction relative to the connecting rod, it can be triggered via the pin. Since no lateral force is generated due to the oscillating movement of the connecting rod, and the relative position between the Z connecting rod and the adjusting screw shaft remains unchanged, the set tie-hide can be held accurately, resulting in high precision. It has the excellent effect of stably performing press working.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing an embodiment of the present invention, Fig. 2 is a longitudinal sectional view showing a conventional ball type suspension connection structure, and Figs. 3, 4, and 5 are pin orientations of the conventional structure. FIG. 3 shows a case where the pin direction is perpendicular to the connecting rod swing direction, and FIG. 4 shows a case where the pin direction coincides with the connecting rod swing direction. , and FIG. 5 show the pin orientation or other orientations. 1... Connecting rod, 2... Adjustment screw shaft, 3... Ball, 3a... Small diameter hole, 3b... Large diameter hole, 4... Pin, 5... Ball cup, 6 ... Hydraulic chamber, 7. Slide, 8. Worm wheel, 10. Pin protrusion means, 13. Spring, 0. Pin embedding means, 0. Fixing means, 1. ...Nut member, 2...Case body.

Claims (1)

[Claims] (1) A ball attached to the lower end of the adjusting screw shaft screwed onto the connecting rod, a ball cup attached to the slide side, and a pin attached to the ball for transmitting the rotation of the worm wheel to the adjusting screw shaft. In the ball type suspension point structure of a press machine, the pin is attached to the ball so as to be freely retractable, and a pin protruding means for protruding the pin in the radial direction of the ball, and a pin burying means for burying the pin in the ball. and
and a fixing means for fixing the connecting rod and the adjusting screw shaft so as to be relatively rotatable, and when adjusting the slide, the fixing means is released and the pin is protruded to transmit the rotational force of the worm wheel to the adjusting screw shaft. During press operation, the pin is buried to disengage the worm wheel and the adjusting screw shaft, and the fixing means is operated to integrally connect the connecting rod and the adjusting screw shaft in a manner that prevents relative rotation. A ball-type suspension point structure for a press machine characterized by being configured as follows.