JP2007229895A - Press-in device, and press-in method of the device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a press-in device capable of precisely pressing in a press-in member to be predetermined press-in length. <P>SOLUTION: The press-in device pushing and pressing a press-in member 1 in a press-in hole 20 of a pressed-in member 2 to be the predetermined length, comprises a measuring means measuring the press-in member 1 or the length in a press-in direction of the press-in member 1 and the pressed-in member 2; an actuator 5 pressing the press-in member 1 into the press-in hole 20; a stopper 4 arranged so as to be inserted from a lower end side in the press-in direction of the press-in hole 20; an insertion amount adjusting means 3 adjusting the insertion length to the press-in hole 20 of the stopper 4; and a controlling means 7 controlling the insertion amount adjusting means 3 by calculating the insertion length to the press-in hole 20 of the pressed-in member 2 of the stopper 4 from the length measured by the measuring means and the predetermined press-in length, and controlling pressing of the actuator 5 according to the length of the press-in member 1 and the insertion length measured by the measuring means. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a press-fitting device that press-fits a press-fitting member into a press-fitting hole of a press-fitted member, and a press-fitting method of the press-fitting device, and in particular, can be press-fitted with high accuracy so as to have a predetermined press-fitting length.

  In the conventional press-fitting device, an accurate accuracy may be required for the press-fitting amount of the press-fitting member into the press-fitted member. In such a conventional servo press machine that performs high-precision press-fitting, the ram is lowered to a height corresponding to a predetermined press-fitting amount, but the press-fitting load varies depending on the processing accuracy and hardness of the press-fitting member and the press-fitted member. Therefore, there is a problem that the press-fitting amount varies and press-fitting cannot be performed with high accuracy. On the other hand, for example, in a press that press-fits a press-fitting member by a predetermined press-fitting amount, the deflection amount of the press with respect to the press-fitting load is measured in advance, and the press-fitting load is measured in an actually press-fitted state. The accuracy of the press-fitting amount is ensured by further press-fitting by the amount of deflection of the press machine (see, for example, Patent Document 1).

JP 2002-273628 A

  The conventional press-fitting device has a large frictional resistance in actual press-fitting, and the frictional resistance varies depending on the location. For this reason, when the press-fitting member repeatedly moves and stops in the press-fitting process, so-called stick-slip occurs. When the press-fitting member is stopped (stick state), the press-fitting load on the press-fitting member becomes excessive. On the other hand, when the press-fitting member starts to move (slip state), the friction coefficient decreases. Become. Due to this phenomenon, the press-fit load is constantly fluctuating and is not stable, and it is difficult to obtain a precise press-fit amount. In addition, when the stick-slip is stopped just before the predetermined press-fitting amount, particularly when performing control by a servo press machine, the predetermined press-fitting amount is exceeded at the moment when the press-fitting load increases and the next movement starts. There is a possibility that overshoot is likely to occur, and it is difficult to accurately perform the press-fitting amount.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a press-fitting device and a press-fitting method for the press-fitting device that can be press-fitted with high precision so as to have a predetermined press-fitting length.

  The present invention relates to a press-fitting device that presses a press-fitting member into a press-fitting hole of a press-fitted member so as to have a predetermined press-fitting length, and measures the length of the press-fitting member or the press-fitting member and the press-fitted member in the press-fitting direction. A pressing means for pressing the press-fitting member into the press-fitting hole of the press-fitting member, a stopper that is freely inserted from the lower end side in the press-fitting direction of the press-fitting hole of the press-fitting member, and a press-fitting of the stopper The insertion amount adjusting means for adjusting the insertion length of the member into the press-fitting hole, and the insertion length of the stopper to the press-fitted member into the press-fitting hole are calculated from the length measured by the measuring means and the predetermined press-fitting length. And a control means for controlling the insertion amount adjusting means and controlling the pressing of the pressing means in accordance with the length of the press-fitting member and the insertion length measured by the measuring means.

  The press-fitting device according to the present invention measures the length of the press-fitting member or the press-fitting member and the press-fitting member in the press-fitting direction in the press-fitting device that presses the press-fitting member into the press-fitting hole of the press-fitted member so as to have a predetermined press-fitting length. Measuring means, a pressing means for pressing the press-fitting member into the press-fitting hole of the press-fitting member, a stopper disposed so as to be insertable from the lower end side in the press-fitting direction of the press-fitting hole of the press-fitting member, and a stopper Insertion amount adjusting means for adjusting the insertion length of the press-fitted member into the press-fitting hole, and the length measured by the measuring means and the insertion length of the stopper into the press-fitting member from the predetermined press-fitting length Control means for calculating and controlling the insertion amount adjusting means and controlling the pressure of the pressing means according to the length of the press-fitting member measured by the measuring means and the insertion length. Press fit into the hole as a stopper It can be stopped.

Embodiment 1 FIG.
Embodiments of the present invention will be described below. 1 is a diagram showing a configuration of a press-fitting device according to Embodiment 1 of the present invention, FIG. 2 is a block diagram showing a configuration of a control system of the press-fitting device shown in FIG. 1, and FIGS. 3 and 4 are shown in FIG. It is a figure for demonstrating the positional relationship and insertion length of a press-fit member and a press-fit member in a press-fit apparatus. In the figure, a press-fitting device for press-fitting a press-fitting member 1 into a press-fitting hole 20 of a press-fitted member 2 so as to have a predetermined press-fitting length, for press-fitting the press-fitting member 1 into the press-fitting hole 20 of the press-fitted member 2. It is conceivable that the actuator 5 serving as a pressing means for performing the above-described pressing is configured by power such as air pressure, hydraulic pressure, or a motor, or configured by a hand press. The size of the circumference is formed to be 50 microns or 0.1 mm smaller than the size of the circumference of the press-fitting hole 20 of the press-fitting member 2 so that the press-fitting hole 2 of the press-fitting member 2 can be inserted from the lower end side in the press-fitting direction A. It is conceivable that the stopper 4 is made of the same material as that of the press-fitting member 1 or is made of a material slightly harder than the press-fitting member 1. In other words, any material that can withstand the load applied from the actuator 5 via the press-fitting member 1 and that does not damage the press-fitting member 1 due to the load.

  The insertion amount adjusting means 3 for placing the press-fitted member 2 on the receiving table 6 and adjusting the insertion length of the stopper 4 into the press-fitting hole 20 of the press-fitted member 2 has sufficient rigidity against the press-fitting load. Since it is necessary to ensure, for example, a structure using a wedge shape is conceivable, and the height of the stopper 4 can be arbitrarily adjusted by placing the stopper 4 on the top of the wedge shape and sliding the wedge shape. Then, the press-fitting member 1 or the press-fitting member 1 and the press-fitting member 2 are measured by measuring means 8 for measuring the length in the press-fitting direction A, and the press-fitting of the stopper 4 from the length measured by the measuring means 8 and the predetermined press-fitting length. The insertion length of the member 2 into the press-fitting hole 20 is calculated to control the insertion amount adjusting means 3 and the actuator 5 is pressed according to the length and insertion length of the press-fitting member 1 measured by the measuring means 8. And control means 7 for controlling.

  Next, a press-in method using the press-in device according to Embodiment 1 configured as described above will be described. In this press-fitting method, a case where a predetermined press-fit length h1 is strictly required, that is, a case where the entire length after press-fitting the press-fitting member 1 into the press-fitting hole 20 of the press-fitted member 2 is important will be described. . First, the press-fitting member length h <b> 2 with respect to the press-fitting direction A of the press-fitting member 1 is measured by the measuring means 8. Next, the control unit 7 calculates the insertion length h3 of the stopper 4 from the predetermined press-fitting length h1 and the press-fitting member height h2 obtained from the measuring unit 8 by calculating (h1-h2). Then, the insertion amount adjusting means 3 is driven based on the insertion length h3, and the stopper 4 is inserted for the insertion length h3. Next, the press-fitting member 1 is set in the press-fitting device, and until the press-fitting member 1 is brought into close contact with the stopper 4 by the actuator 5 according to the press-fitting member length h2 of the press-fitting member 1 and the insertion length h3 of the stopper 4 by the control means 7. Control to press fit and complete assembly.

  In another press-fitting method, when the predetermined press-fitting length h11 is strictly required, that is, the press-fitting length of the press-fitting member 1 in which the press-fitting member 1 is press-fitted into the press-fitting hole 20 of the press-fitted member 2 is important. The case will be described. First, the measuring means 8 measures the press-fitting member length h <b> 2 with respect to the press-fitting direction A of the press-fitting member 1 and the press-fitting member length h <b> 4 with respect to the press-fitting direction A of the press-fitting member 2. Next, the control means 7 calculates the insertion length h3 of the stopper 4 from the predetermined press-fit length h11 and the press-fit member height h4 obtained from the measuring means 8 by calculating (h4-h11). Thereafter, control is performed in the same manner as described above, and the assembly is completed. Although not particularly shown here, it goes without saying that the press-fitting member 2 may be heated before the press-fitting member 2 is placed on the press-fitting device in order to reduce the press-fitting load.

  According to the first embodiment configured as described above, since the press-fitting position of the press-fitting member can be positioned at a predetermined height by the stopper, even if stick-slip occurs, the predetermined press-fitting amount is exceeded by overshoot or the like. There is no end. Further, even when the press-fitted member is heated, the press-fitted member can quickly complete the press-fitting while the temperature is high, and the press-fitted member can be press-fitted with high precision so as to have a predetermined press-fitting length.

Embodiment 2. FIG.
In the first embodiment, since the insertion amount adjusting means 3 of the press-fitting device requires a slight space below the cradle 6, when the press-fitting load is particularly large, the cradle 6 is deformed and the press-fitted member 2. May be slightly displaced. On the other hand, in the second embodiment, as shown in FIG. 5, the load applied to the press-fitted member 2 from the actuator 5 with respect to the insertion amount adjusting means 30 is compared with the press-fitted member 2 in the press-fitting direction A. Similarly, the displacement of the height position with respect to the press-fitting direction A due to the load of the press-fitting member 2 and the displacement of the height position with respect to the press-fitting direction A due to the load of the stopper 4 are interlocked. Specifically, in the first embodiment, the arbitrary insertion length is adjusted by moving the insertion amount adjusting means 3 of the press-fitting device in the press-fitting direction of the stopper 4. 2, the stopper 4 is fixed to the lower part of the insertion amount adjusting means 30, and the insertion amount adjusting means 30 adjusts the height of the cradle 6 in the press-fitting direction A and adjusts the insertion length of the stopper 4 accordingly. It has become. For the adjustment of the height in the press-fitting direction A, a structure using a wedge shape can be considered, and the stopper 4 is disposed between the wedge shapes formed in, for example, a U shape, and the height of the cradle 6 is adjusted by sliding the wedge shape. The height is arbitrarily adjusted by adjusting. Since the press-fitting method of the press-fitting device in the second embodiment is the same as that in the first embodiment, description thereof is omitted.

  According to the second embodiment configured as described above, the effect similar to that of the first embodiment is obtained, and the space below the cradle of the insertion amount adjusting means is eliminated, and the press-fitting load is reduced. Even if it is large, the rigidity of the cradle can be improved and the minute displacement of the press-fit member can be reduced. Further, since this minute displacement is transmitted to the entire insertion amount adjusting means through the wedge portion of the insertion amount adjusting means, the displacement amount with respect to the load of the press-fitted member and the displacement amount with respect to the load of the insertion amount adjusting means are interlocked and extended. Since the amount of displacement with respect to the load of the stopper is interlocked, the change in relative position is almost negligible, and press-fitting can be performed with high accuracy so as to have a predetermined press-fitting length as compared with the first embodiment.

Embodiment 3 FIG.
Even in the second embodiment, the amount of minute displacement of the press-fit member is not zero. Therefore, as a method for realizing press-fitting with higher accuracy, in the third embodiment of the present invention, a press-fitting device control system as shown in FIG. 6 is used. The control system of the press-fitting device can be used in the same manner in each of the above embodiments. However, for the sake of convenience, the description will be made with reference to FIG. 1 of the first embodiment. A displacement amount measuring means 9 for measuring a minute displacement of the press-fitted member 2 is added. Specifically, a strain gauge or a laser displacement meter can be considered. In the press-fitting method, the step of calculating the insertion length h3 of the stopper 4 and adjusting the amount-of-insertion adjusting means 3 and the actuator 5 to press-fit is the same as in the first embodiment. Further, in the third embodiment, a minute displacement of the press-fitted member 2 is measured by the displacement amount measuring means 9, and the control means 7 constantly corrects and controls the insertion amount adjusting means 3 according to the measured value to insert the stopper 4. The length h3 is changed, and the pressing of the actuator 5 is controlled accordingly, and the assembly is completed.

  According to the third embodiment configured as described above, the press-fitting load is particularly large as well as the same effects as the above-described embodiments, and the press-fitting is performed by the deformation of the cradle of the insertion amount adjusting means. Even in the case where the member is slightly displaced, the minute displacement of the member to be pressed can be fed back to the stopper height, so that it is possible to perform press-fitting with higher accuracy so as to have a predetermined press-fitting length.

  In each of the above-described embodiments, the structure using the wedge shape is shown as an example of adjusting the height of the insertion amount adjusting means. However, the structure is not limited to this, and sufficient rigidity is secured with respect to the press-fit load. And a function that arbitrarily adjusts the press-fitting amount are satisfied, and the mechanism is not particularly limited to a mechanism using a wedge shape. For example, the height may be adjusted by a screw structure. .

It is a figure which shows the structure of the press injection apparatus of Embodiment 1 of this invention. It is a block diagram which shows the structure of the control system of the press injection apparatus in FIG. It is a figure for demonstrating the positional relationship and insertion length of a press-fit member and a press-fit member in the press-fit apparatus shown in FIG. It is a figure for demonstrating the positional relationship and insertion length of a press-fit member and a press-fit member in the press-fit apparatus shown in FIG. It is a figure which shows the structure of the press injection apparatus of Embodiment 2 of this invention. It is a block diagram which shows the structure of the control system of the press injection apparatus of Embodiment 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Press-fit member, 2 Press-fit member, 3,30 Insertion amount adjustment means, 4 Stopper,
5 Actuators, 7 Control means, 8 Measuring means, 9 Displacement measuring means, 20 Press-fitting holes.

Claims (5)

In a press-fitting device for press-fitting a press-fitting member into a press-fitting hole of a press-fitting member so as to have a predetermined press-fitting length, measuring means for measuring the length of the press-fitting member or the press-fitting member and the press-fitted member in the press-fitting direction A pressing means for pressing the press-fitting member into the press-fitting hole of the press-fitted member, a stopper disposed so as to be freely inserted from the lower end side in the press-fitting direction of the press-fitting hole of the press-fitted member, and the stopper The insertion amount adjusting means for adjusting the insertion length of the press-fitted member into the press-fitting hole, the length measured by the measuring means and the predetermined press-fitting length to the press-fitting hole of the press-fitted member of the stopper Control means for controlling the insertion amount adjusting means by controlling the insertion amount adjusting means and controlling the pressure of the pressing means according to the length of the press-fitting member measured by the measuring means and the insertion length; With Press-fitting device, characterized in that. A load applied from the pressing means to the press-fitting member is transmitted to the press-fitting member in the same manner as the press-fitting member with respect to the press-fitting direction. 2. The press-fitting device according to claim 1, wherein a displacement amount of the height position and a displacement amount of the height position with respect to the press-fitting direction due to the load of the stopper are interlocked. Displacement amount measuring means for measuring a displacement amount of the press-fitting member in the press-fitting direction when the pressing means is pressed is provided, and the control means adjusts the insertion length of the stopper based on the displacement amount. 3. The press-fitting device according to claim 1, wherein the press-fitting device is adjusted by the means and the pressing of the pressing means is adjusted based on the displacement amount. 4. The press-fitting method for a press-fitting device according to claim 1, wherein a length of the press-fitting member or the press-fitting member and the press-fitted member is measured, and the measured length and the predetermined press-fitting length. From this, the insertion length of the stopper into the press-fitting hole of the press-fitted member is calculated, and the stopper is inserted by the insertion length from the lower end side in the press-fitting direction of the press-fitting hole of the press-fitted member. A press-fitting method for a press-fitting device, wherein the press-fitting member is pressed into a press-fitting hole of the press-fitted member according to the length and the insertion length. The displacement amount of the press-fitting member in the press-fitting direction at the time of pressing is measured, the insertion length of the stopper is adjusted based on the displacement amount, and the press-fitting member is pressed again. 4. A press-fitting method of the press-fitting device according to 4.

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