JPH05177560A - Pipe press-fitting method and device - Google Patents

Abstract

(57) [Abstract] [Purpose] Correctly press the pipe into the work while detecting deformation in advance. [Structure] The elevating plate 4 is lowered by the press-fitting cylinder 3, and the pipe p is press-fitted into the fitting hole a of the work W by the press-fitting pin 8 attached to the lower surface thereof. 7 and the slide plate 14 slidably attached to the regulating rod 10 is detected by the displacement gauge 16 to sequentially detect the press-fitting load at each press-fitting position in the process of press-fitting the pipe p, resulting in poor press-fitting. It is designed to prevent this.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe press-fitting method and device for confirming the press-fitting amount and the press-fitting load during press-fitting.

[0002]

2. Description of the Related Art When press fitting a pipe into a groove of a work,
Even if these have dimensional accuracy within the range of the tolerance, the press-fitting may vary to some extent depending on the combination. Therefore, the assembly is usually carried out while confirming the press-fitting load. However, in such a press-fitting management method, even if the pipe or a part of the slot is deformed, it cannot be checked, so that there is a problem that the pipe is press-fitted in a deformed state due to these causes.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and its object is to:
(EN) A new pipe press-fitting method and device for checking the press-fitting amount and the press-fitting load to correctly press-fit a pipe.

[0004]

That is, according to the present invention, as a pipe press-fitting method for achieving such a subject, an initial press-fitting load acting on the pipe press-fitting means is detected by the load detecting means, and the detected value is set. The first step of operating the pipe press-fitting means and the displacement amount detecting means only when it is within the area, and the press-fitting load at each press-fitting position is detected in the subsequent press-fitting process, and only when these detected values are within the set area As a device applied to this method, a pipe press-fitting member attached via a load detecting means is moved in a press-fitting direction of the pipe under pressure. The pipe apparatus includes a press-fitting means and a driven member that moves from the press-fitting start position in accordance with the movement of the press-fitting member and has a part to be detected by the displacement amount detecting means.

[0005]

EXAMPLES The examples shown below will be described below. FIG. 1 shows an embodiment of the device of the present invention used for press-fitting a pipe.

In the figure, reference numeral 1 is a work mounting base 20.
This is a gate-type press-fitting device support frame that is erected so as to straddle over, and a press-fitting cylinder 3 for press-fitting the pipe p into the fitting hole a of the workpiece W is erected on the top support substrate 2. .

Reference numeral 4 denotes an elevating plate which is driven by the press-fitting cylinder 3 and which is vertically moved by being guided by the guide sleeves 5 and 5, and which is provided on the lower surface of the elevating plate 4 which is connected to the press-fitting cylinder 3 via a connecting rod 6. Is equipped with a press-fitting pin 8 having a shoulder part 9 for press-fitting the pipe via a load cell 7, and measures the press-fitting load to work the pipe p on a workpiece w.
It is configured to be press-fitted into the fitting hole a.

A restricting rod 10 that abuts the lower surface of the supporting substrate 2 and restricts the upper limit of rising is erected on one end of the elevating plate 4, and is further fixed to the restricting rod 10 and the supporting substrate 2. A slide plate 14 is slidably attached to the guide bar 13.

The slide plate 14 is a member which comes into contact with the stopper 11 at the upper end of the regulating rod 10 and descends together with the elevating plate 4 after the elevating plate 4 descends by the distance l from the rising end to the press-fitting start position. A rod 15 is fitted to a displacement gauge 16 on the support substrate 2, and a rod 15 for detecting the amount of downward movement of the slide plate 14, that is, the amount L of press-fitting, is erected on a part of 14.

Reference numerals 17, 18, and 19 in the figure denote sensors for detecting the upper and lower limits of the lifting plate 4 arranged near the sliding rod 12 of the lifting plate 14, and 21 is provided on the base 20. Further, reference numeral 22 denotes a work fixing jig, and 22 denotes a clamper for holding the pipe p at the fitting position.

Next, a method for press-fitting the pipe p using this apparatus will be described with reference to FIG. When the pipe p is supplied to the end of the fitting hole a of the work W (step a), the press-fitting cylinder 3 lowers the elevating plate 4 according to a preset program (step b). FIG. 1 shows the state immediately after the start of the descent.

Then, as shown in FIG. 2 (a), when the press-fitting pin 8 is inserted into the pipe p and held therein, the press-fitting cylinder 3 temporarily stops descending at step c,
The clamper 22 holding the pipe p is evacuated (step D), and then the operation is restarted to move the lifting plate 4
Lower (step E).

In this state, the slide plate 14
Contacts the stopper 11 at the upper end of the regulating rod 10 and starts descending together with the elevating plate 4, so the displacement gauge 16 is reset to zero when the initial load W ₁ reaches 50 kg / cm, for example (step). .

Then, while the initial press-fitting load W ₁ is maintained, the pipe p is further press-fitted until the press-fitting amount L reaches a point where the press-fitting amount L is B2 mm (step), and the detected value at this point is the set value W. It is determined whether it is within ₁ and the set value W ₁
If it exceeds, it is considered that the pipe p is not inserted into the fitting hole a, this condition is notified by a buzzer or a display lamp, and the press-fitting cylinder 3 is operated in the reverse direction to bring the press-fitting unit to the initial position. Restore (step).

On the other hand, when the press-fitting load at this point is within the set value W ₁ , the press-fitting is further continued and the second press-fitting position L
₂ For example, measure the second press-fitting load W ₂ at a point of 15 mm (step N), judge whether this value is within the set value range (steple), and reach near the end of press-fitting (step S). E) The first lower limit detection sensor 18 is the sliding rod 12
When the edge of the
And the press-fitting load W by the load cell 7 are detected (step C), and the second suitability is determined here (step YO).

When these detected values are within the set value range, the last press-fitting is performed, and the second lower limit detection switch 19 is turned on. To return to the initial state (step
Tsu).

If it is determined that the detected values are not within the preset range in each step, check, and check, it is considered that some assembly failure has occurred, and the buzzer or the indicator lamp gives an error. And the press-fitting unit is returned to its original position.

By the way, the method of press-fitting a pipe based on a program for measuring the press-fitting amount L and the press-fitting load W at several check points has been described above. It is also possible to continuously measure the press-fitting load W and plot the data to constantly judge whether or not the measured value is within the set value range.

[0019]

As described above, according to the present invention, the initial press-fitting load of the pipe is detected, and the pipe press-fitting means and the displacement amount detecting means are operated only when the detected value is within the set area. Therefore, only when the pipe is correctly inserted into the fitting hole of the work and the pipe press-fitting means is properly in contact with the pipe, the press-fitting operation of the pipe can be advanced and the pipe can be properly press-fitted.

Further, since the press-fitting load at each press-fitting position is detected during the press-fitting process of the pipe, the quality of the press-fitting caused by the combination of the pipe and the work, and the press-fitting caused by the partial deformation of the pipes and the like. It is possible to prevent deformation of the pipe and the like indirectly in the press-fitting process, and prevent defective press-fitting of the pipe.

[Brief description of drawings]

FIG. 1 is a side view of an apparatus showing an embodiment of the present invention.

2 (a) and 2 (b) are diagrams showing respective operation states of pipe press fitting by the same device.

FIG. 3 is a flowchart showing a pipe press-fitting operation.

FIG. 4 is a diagram showing a relationship between a press-fitting amount and a press-fitting load in a pipe press-fitting process.

[Explanation of symbols]

 3 Press-fitting cylinder 4 Lifting plate 7 Load cell 8 Press-fitting pin 10 Control rod 14 Slide plate 16 Displacement meter 17-19 Upper / lower limit detection sensor 21 Work fixing jig W Work P Pipe

Claims (2)

[Claims] 1. A first step of detecting an initial press-fitting load acting on the pipe press-fitting means by a load detecting means, and activating the pipe press-fitting means and the displacement amount detecting means when the detected value is within a set region, A press-fitting method for a pipe, which comprises a step of detecting a press-fitting load at each press-fitting position in a subsequent press-fitting process and sequentially press-fitting the pipe to a final press-fitting position only when each detected value is within a set region. 2. A press-fitting means for pressurizing and moving a pipe press-fitting member attached via a load detecting means in a press-fitting direction of the pipe, and a press-fitting member which moves from a press-fitting start position with the movement of the press-fitting member.
Also, a pipe press-fitting device comprising a driven member having a part to be detected by a displacement amount detecting means.