JPH047852Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a press-fitting device used for press-fitting a plug into an oil hole drilled in a crankshaft.

[Prior art]

As a conventional press-fitting device, for example,
As disclosed in Japanese Patent No. 57-145631, there is known a press-fitting device that press-fits a plug such as a steel ball to seal a machined hole such as an oil hole drilled in a workpiece. In this method, the workpiece is held in a fixed state, and the press-fitting unit for press-fitting the plugs is shifted to sequentially press-fit the plugs into a plurality of holes drilled in the workpiece.

However, since the press-fitting operation uses impact force, the press-fitting reaction force acting on the press-fitting unit and the moving unit that shifts the press-fitting unit becomes excessive. Therefore, this press-fitting reaction force causes the moving base of the moving unit to shift or play, which tends to reduce the accuracy of the press-fitting position. For this reason, there was a problem in that poor press-fitting occurred.

[Purpose of invention]

The present invention has been made in consideration of the above-mentioned conventional problems, and an object of the present invention is to provide a press-fitting device that prevents deterioration of the accuracy of press-fitting positions and prevents press-fitting defects from occurring.

[Structure of the idea]

In order to achieve the above object, the press-fitting device according to the present invention is a press-fitting device in which a press-fitting unit for press-fitting a press-fitting member into a press-fitted member is movably provided via a moving unit. The movable unit is equipped with a clamp unit to prevent displacement of the movable base when a press-fitting reaction force is applied to the movable base, and by receiving the press-fitting reaction force that acts during press-fitting with the clamp unit,
The present invention is characterized in that it is configured to prevent the movable table from shifting or causing play, thereby preventing a decrease in the accuracy of the press-fitting position and preventing press-fitting defects.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 8.

As shown in FIGS. 1 and 2, on the upper surface 1a of the base 1, there is a pair of rails 2, 2, and a movable platform 3 supported by the rails 2, 2 and movable in the horizontal direction.
A workpiece moving unit 5 is provided, which includes a servo motor 4 for driving the moving table 3.

On the moving table 3 of the workpiece moving unit 5, there are
A center cylinder 6 and a clamp cylinder 7 are provided facing each other in the direction of the rails 2, 2. The above center cylinder 6 and clamp cylinder 7
A clamp shaft 9, which is a press-fitted member having four oil holes 8 bored therein, is attached between the two ends with support at both ends. A center cylinder 6 is further mounted on the moving table 3 of the workpiece moving unit 5.
A clamp 10 that holds the four intermediate parts of the clamp shaft 9 between the clamp cylinder 7 and the clamp cylinder 7...
..., and an index motor 11 which is an indexing mechanism for rotating the clamp shaft 9 by a predetermined angle.

On the other hand, on the upper surface 1a of the base 1, there are also a pair of rails 22, 22 provided parallel to the rails 2, 2 of the workpiece moving unit 5, and
A left-right moving unit 25 is provided, which includes a moving table 23 supported by workpieces 2 and 22 and movable in the same direction as the moving table 3 of the workpiece moving unit 5, and a servo motor 24 for driving the moving table 23. On the upper surface 23a of the movable table 23 of the left-right moving unit 25, there are further provided a pair of rails 32, 32 provided in a direction perpendicular to the rails 22, 22 of the left-right moving unit 25, and a pair of rails 32, 32 supported by the rails 32, 32. A longitudinal moving unit 35 is provided which includes a moving table 33 movable in a direction perpendicular to the moving table 23 of the left-right moving unit 25, and a servo motor 34 for driving this moving table 33.

On both sides of the longitudinal movement unit 35, there are longitudinal clamp units 41, 4 for preventing displacement of the movement table 33 in the longitudinal direction when a press-fit reaction force is applied.
1 is provided. As shown in FIGS. 3a and 3b, this front-rear clamp unit 41 has a main body 4 attached to a moving base 23 of a left-right moving unit 25.
2, a drive cylinder 43 attached to this main body 42 and equipped with an abutting member 44 at the tip of a piston rod 43a, and a drive cylinder 43 that is inserted into through holes 42b, 42b of a yoke part 42a formed at the upper part of the main body 42,
A pin 46 fixed by a set screw 45 and a clamp arm 4 rotatably supported by the pin 46.
7, and a tension coil spring 48 that biases the clamp arm 47 in a direction in which the lower surface 47a of the end of the drive cylinder 43 comes into contact with the contact member 44. Also,
The upper surface 3 of the moving table 33 of the longitudinal moving unit 35
3a is provided with a stopper 49 that abuts the lower surface 47a of the clamp arm 47 and the lower surface 47b of the opposite end when the drive cylinder 43 is driven forward.

On the other hand, a frame 51 is provided on the upper surface 33a of the moving table 33 of the back-and-forth moving unit 35, and a pair of vertical rails 62, 62 are provided on the side of the workpiece moving unit 5 of this frame 51, and this rail 6
2, 62 and movable in the vertical direction
3 and a vertical drive cylinder 64 for driving the moving table 63.

On both sides of the vertically moving unit 65, there are vertically clamping units 71, 7 for preventing vertical displacement of the moving table 63 when a press-fitting reaction force is applied.
1 is provided. This clamp unit 71
As shown in FIGS. 4a to 4c, there is a main body 72 attached to the frame 51, and a lock member that is slidably held by a U-shaped cross section 72a of the main body 72 and has a tapered part 73a at the tip. 73, pressing plates 74, 74 of the locking member 73, and a driving cylinder 76 supported by the main body 72 via a cylinder support 75 and driving the locking member 73 forward and backward. In addition, a locking recess 77a .
A locking member 77 is provided which has a locking contact portion 77b and is locked by the tapered portion 73a when the locking member 73 is driven forward.

The moving table 63 of the vertical moving unit 65 includes:
A swing drive mechanism 5 including a swing base plate 53 that is driven by a servo motor 52 and is rotatable around an axis parallel to the rail 32 of the back and forth moving unit 35.
4 is provided. The swing base plate 53 includes a press-fitting unit 81 for press-fitting a steel ball 55, which is a press-fitting member, into the oil hole 8 of the crankshaft 9 attached to the workpiece moving unit 5, and a leak inspection unit for detecting a press-fitting failure of the steel ball 55. A unit 91 is provided.

As shown in FIG.
A press-fit piston 83 is fitted with a press-fit rod 82 that press-fits the steel ball 55, and this press-fit piston 83 is slidably housed, and the end is closed with a cover 84, and the port is closed. Air chamber 85b leading to port 85a and air chamber 85d leading to port 85c
A press-fitting cylinder 85 and a press-fitting piston 83 are inserted, and a supply section 86a for the steel balls 55 is provided, and a caulking rod 86 to which a caulking head 87 is attached, and this caulking rod 86 is driven to form a clamp shaft. A caulking piston 88 that caulks the oil hole 8 of No. 9, and an air chamber 90b that houses the caulking piston 88 so as to be slidable therein, and has both ends closed by a cover 89 and the press-fit cylinder 85, and that communicates with the port 90a. It consists of a caulking cylinder 90 forming an air chamber 90d communicating with a port 90c.

The leak inspection unit 91 also includes a base plate 92 attached to the caulking cylinder 90.
and a guide 94 attached to this base plate 92 and equipped with linear bearings 93, 93,
An inspection rod 96 is guided by the guide 94 and has a contact member 95 that comes into close contact with the oil hole 8 of the crankshaft 9, and communicates the opening of the oil hole 8 with a leak tester (not shown). and a drive cylinder 97 that drives the.

In the above configuration, the operation when press-fitting the steel ball 55 into the oil hole 8 of the crankshaft 9 will be described below.

First, as shown in FIG. 6, the moving table 3 of the workpiece moving unit 5, the moving table 23 of the left-right moving unit 25, the moving table 33 of the longitudinal moving unit 35, and the moving table 63 of the vertical moving unit 65 are set in advance. At the same time, the index motor 11 and the swing base plate 53 of the swing drive mechanism 54 are rotated so that the press-fitting unit 81 faces the oil hole 8 of the crankshaft 9.

At this time, the drive cylinder 43 of the front-back clamp unit 41 is driven forward to press the lower surface 47b of the front-back moving unit 35 of the clamp arm 47 against the stopper 49, so that even if a press-fit reaction force acts, the front-back moving unit 35 will not move. To prevent the moving table 33 from shifting. Similarly, the drive cylinder 76 of the upper and lower clamp units 71 is driven forward to lock the lock member 73.
The tapered portion 73a of the locking member 77 is connected to the locking recess 77 of the locking member 77.
a or the locking contact portion 77b to prevent the movable table 63 of the vertically moving unit 65 from shifting.

Next, high pressure air is injected into the port 8 of the injection unit 81.
5a into the air chamber 85b and press-fit the piston 8.
3 is driven forward, and the steel ball 55 supplied from the supply section 86a is press-fitted into the oil hole 8. Subsequently, high pressure air is introduced into the air chamber 90b from the port 90a to drive the caulking piston 88 forward, and the opening of the oil hole 8 is caulked to seal the press-fitted steel ball 55 so that it will not come out.

When the press-fitting and caulking are completed, high-pressure air is introduced from the ports 85c, 90c into the air chambers 85d, 90d to close the press-fit piston 83 and the caulking piston 8.
8 is driven backward. Next, after driving the drive cylinders 43 and 76 of the front and rear clamp unit 41 and the top and bottom clamp unit 71 backward to release the clamps, as shown in FIG. A leak inspection unit 91 is placed opposite the oil hole 8 into which the steel ball 55 is press-fitted. Therefore, the drive cylinder 97 is driven forward to press the contact member 95 of the inspection rod 96 against the oil hole 8, and a leak test is performed using a leak tester (not shown).
The press-fitting work is completed.

Furthermore, when press-fitting the steel ball 55 into the second oil hole 8, as shown in FIG. Then, the pivoting base plate 53 is rotated so that the press-fitting unit 81 faces the second oil hole 8 of the crankshaft 9, and after the movable tables 33 and 63 are clamped, the press-fitting and leakage inspection are performed.

Thereafter, the press-fitting work is sequentially performed for the third and fourth oil holes 8 and 8 in the same manner.

[Effect of idea]

As described above, the press-fitting device according to the present invention has the following features:
In a press-fit work device in which a press-fit unit for press-fitting a press-fit member into a press-fit member is movably provided via a movable unit, movement when a press-fit reaction force acts on a movable table provided in the movable unit. This structure includes a clamp unit to prevent the position of the stand from shifting. As a result, the clamp unit receives the press-fit reaction force that acts during press-fitting, and the movable table does not shift or play, which prevents a decrease in the accuracy of the press-fit position and prevents press-fit defects. It has the effect of being able to do it.

[Brief explanation of the drawing]

1 to 8 show an embodiment of the present invention, in which FIG. 1 is a front view of a press-fitting device;
Figure 2 is a side view of the same, Figure 3a is a front view showing the structure of the front and rear clamp units, Figure b is a side view of the same, Figure 4a is a front view of the upper and lower clamp units, Figure b
is a plan view of the same, FIG. FIG. 7 is a front view showing the operation of the press-fitting device during leakage inspection. 9 is a crankshaft (press-fitted member), 33,
63 is a moving table, 35 is a front-back moving unit, 41 is a front-back clamp unit, 55 is a steel ball (press-fitting member),
65 is a vertically moving unit, 71 is a vertical clamp unit, and 81 is a press-fitting unit.

Claims (1)

[Scope of utility model registration request] In a press-fit work device in which a press-fit unit for press-fitting a press-fit member into a press-fit member is movably provided via a movable unit, movement when a press-fit reaction force acts on a movable table provided in the movable unit. A press-fitting device characterized by being equipped with a clamp unit for preventing displacement of the table.