JPH07223128A - Pressing-in machine - Google Patents

Abstract

PURPOSE:To properly maintain the inner diameter of a pressed-in part having a through-hole with high accuracy after a pressing-in process by providing an A-shaft for actuating a tilt motion under numerical control, and a B-shaft for actuating a tilt motion right and left under numerical control. CONSTITUTION:A servo motor 12 tilts a substrate 15 back and forth using an A-shaft member 14 connecting an elevator plate 13 to the substrate 15 as a support point, so that the axial direction of a through-hole in a workpiece W is kept in parallel to a vertically mounted rod type jig at the forward end of a hydraulic cylinder and a vertical tubular jig where the end of the rod type jig penetrates. Furthermore, another servo motor 16 tilts right and left a fastener 18 for holding a workpiece W using a B-shaft member connecting the substrate 15 to the fastener 18 as a support point. Also, another servo motor drives and controls a Y-shaft member 2 and an X-shaft member 6, and the axial center of the vertically positioned through-hole is maintained at a pressing-in position immediately above the rod type jig. According to this construction, a well satisfactory result can be provided, even when an allowable tolerance is stringently set.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine and a jig for inserting an assembly part into a hole.

[0002]

2. Description of the Related Art Generally, when a rotating shaft is assembled in a hole of a work, a part made of a wear resistant material called a bush is fitted between the through hole of the work and the shaft. Has been done. As shown in FIG. 8 which shows the state immediately before the bush is press-fitted into the work, the mounting method is as follows.
The flange portion 45 of the jig rod 44 is wrapped in the pocket 43 of the seat 42 of the pressing member 41 formed at the tip of the rod 40 of the hydraulic cylinder 39 attached to the No. 8. Then, the bush M is stabbed by the jig rod 44, and the work W
The through holes H are overlapped so as to face the bush M along a workpiece positioning jig (not shown). Then, the hydraulic cylinder 39 advances until the bush M faces the through hole H of the work W, the jig rod 44 penetrates the through hole H, and then another bush M is stabbed by the jig rod 44 from above and descends from above. The hydraulic cylinder 39 again with the pressing member 46
Is pushed forward to push the bushes M, M, the bush M is inserted into the through hole H of the work W.

At this time, even if the outer peripheral shape of the jig rod 44 is smooth and the tolerance of the outer shape is finished with a strict accuracy, the bush M has an eccentric inner diameter and outer shape. Perhaps, the inner diameter after press fitting is

[0004]

[Table 1]

As can be seen from the difference between the maximum inner diameter and the minimum inner diameter for one bush in the measurement result shown in (1), the allowable tolerance of the inner diameter is +30 to +45 μ with respect to the diameter of 12 mm, but it is largely deviated from the tolerance, and is substantially elliptical. Was not desirable as a bush after press-fitting. Further, if there are a plurality of press-fitting points on the work W and the through holes H are not parallel to each other, a plurality of the above equipments are required, and even if the work W is changed in design, the equipment cost will increase, so an automatic machine is desired. It was

[0006]

The problem to be solved by the present invention is to secure the inner diameter tolerance with sufficient accuracy when a component having an inner diameter hole such as a bush is press-fitted into a recess or through hole of a workpiece. However, even if there is a change in the shape of the concave portion or the through hole of the work, it is possible to cope with it at a minimum cost.

[0007]

For this purpose, in order to make the inner diameter axis of the work to be fitted and the outer diameter axis of the part to be press-fitted coincide with each other, drive control of five axes, that is, horizontal Z, Y axes, and vertical Z axes is performed. In addition, it is formed with drive control of the forward and backward tilting A axis and the leftward and rightward tilting B axis. Further, a balance means is additionally provided between the workpiece fixing member and the Z axis, and a rod-shaped jig for holding the press-fitted part is provided at the tip. Then, press-fitting work is performed by an NC control machine equipped with the rod-shaped jig in which a plurality of concave grooves are formed on the outer periphery of the position side corresponding to the inner diameter of the press-fitting component on the jig member facing the pressing force member descending from above. To do.

[0008]

Then, when the press-fitting component is placed on the rod-shaped jig and the work is placed on the work fixing member, first, A
The rod-shaped press-fitting jig is controlled in parallel with the press-fitting hole axis of the work by B-axis control, and then the press-fitting hole of the work is position-controlled within the range in which the balance means operates and the range of the stroke of the jig member by Z-axis control. Further, it can be placed on the stroke line of the jig member that advances and retracts the inner diameter of the press-fitting hole of the work and the outer diameter of the press-fitting component by the Z and Y axes. And the balancing means is Z
The jig member that supports the work in place of the shaft and moves forward and backward while the Z-axis is not loaded advances to press-fit the press-fitting component into the press-fitting hole of the work. Then, when the rod-shaped press-fitting jig is retracted, the press-fitting component is integrated with the work, and the rod-shaped press-fitting jig is separated from the inner diameter of the press-fitting component. At this time, the plurality of concave grooves formed on the outer periphery of the jig work effectively, the inner diameter of the press-fitting component is ensured with high accuracy, and the work balance and the Z-axis are distorted because the balance means supports instead of the Z-axis. Nothing.

[0009]

Embodiments will now be described with reference to the drawings of embodiments of the present invention. First, the drawings will be described. FIG. 1 is an elevation view of a press-fitting machine 1 in which a JIS-B1581 (copper type 2) bush is assembled to a wiper blade which is an aluminum alloy automobile part, and 2 is a base. 3 is a Y-axis member that is driven and controlled on a rail member 5 that is placed on the rail 3 and that is relatively displaced by the servomotor 4.
An X-axis member that is driven and controlled on a rail member 8 having a similar function by a servo motor 7 on the shaft member,
Reference numeral 9 is a Z-axis member which is driven and controlled on a rail member 11 which is on the X-axis member and has a similar function by the servomotor 10. 2 is a side view of the press-fitting machine 1 of FIG. 1, in which 12 is a back-and-forth tilting of the base 15 about an A-axis member 14 having a variable angle function fixed to the elevating plate 13 of the Z-axis member 9 as a fulcrum. The servo motor is shown.

Further, the servo motor 16 is capable of tilting the fixing member 18 for holding the wiper blade W to the left and right with the B-axis member 17 fixed to the base 15 and having a changing angle function as a fulcrum. Referring back to FIG. 1, the pedestal 19 on the base 3
The rod-shaped jig 21 at the tip of the hydraulic cylinder 20
A jig member 22 for holding the is fixed vertically to the left and right. A frame 23 is erected on the pedestal 19, and a pedestal 24 above the pedestal 19 is provided with a pushing pressure member 27 for advancing and retreating from the hydraulic cylinder 25 and holding a tubular jig 26 through which the tip of the rod-shaped jig 21 penetrates. Is also installed vertically on the left and right.

A pedestal 28 is installed on the pedestal 19, and a hand member 31 having a chuck hand 30 which moves forward and backward by a hydraulic cylinder 29 is attached to the pedestal 28. In FIG. 3, a separating mechanism is provided between the lifting plate 13 and the ball screw 32 so that the force at the time of press-fitting is not applied to the Z axis, and the air cylinder 33 and the support member 34 are configured so as not to load the ball screw 32. Balancer 3
5 is shown. Further, in FIG. 4, the jig member 22 has the concave groove 3
6 is a view in which a rod-shaped jig 21 having 6 engraved on its outer periphery is fixed to the tip. FIG. 5 is an outline view of the wiper blade W, in which any or all of the polar coordinates xyz are not 0, and a stepped through hole H is provided on both sides in the r-axis direction, and another stepped portion is provided on both different sides in the r-axis direction as well. Owns 2 through holes K and 4
It shows that two of the bushes M, M are press-fitted. FIG. 6 is a cross-sectional view of the bush M having the inner diameter hole 37. FIG. 7 is a detailed view of the groove 36.

Next, description will be made with reference to the drawings. First, the bushes M, M, and the like are manually gripped by the bar-shaped jig 21 and the chuck hand 29.
Then, the wiper blade W is set on the fixing member 18, and a switch of an NC control panel (not shown) is turned on. Then, any or all of the polar coordinates xyz of the wiper blade W are not 0. The axial direction of the through hole H in the r-axis direction is vertically installed at the tip of the hydraulic cylinder 20 in the rod-shaped jig 21.
And the vertical tubular jig 24 through which the tip of the rod-shaped jig 21 penetrates, the servo motor 12 uses the A-axis member 14 fixed to the lift plate 13 and the board 15 as a fulcrum to move the board 15 back and forth. Further, the servo motor 16 tilts the fixing member 18 for holding the wiper blade W to the left and right with the B-axis member 17 fixed to the base 15 and the fixing member 18 as a fulcrum.
The servo motor 4 drives and controls the Y-axis member 2 via the rail member 5, the servo motor 7 drives and controls the X-axis member 6 via the rail member 8, and the servo motor 10 controls the Z-axis member 9 via the rail member 11. Drive-controlled, vertical through hole H
The shaft center of is placed at the press-fitting position directly above the rod-shaped jig 21.

Next, pressure is applied to the air cylinder 33 of the balancer 35 so that the fixing member 18 for holding the wiper blade W is stationary, and the servo motor 10 rotates the ball screw 32 to move the supporting member 34 and the elevating plate 13 together. The ball screw 32 is separated so as not to apply a pressure input to the ball screw 32. Then, after that, the rod-shaped jig 21 holding the bush M
The hydraulic cylinder 2 installed on the pedestal 19 on the base 3.
When 0 pushes up the bush M through the through hole H which is perpendicular to the axis and the bush M faces the through hole H, the chuck hand 29 holding another bush M moves the hydraulic cylinder 28 forward to push the bush M into a rod-shaped jig. Then, the bush M is transferred to the tip of the rod-shaped jig 21 penetrating the wiper blade W, and the chuck hand 29 is retracted. Then, the tubular jig 26 is lowered by the forward movement of the hydraulic cylinder 25, and the bush M, the through hole H of the wiper blade W, and the other bush M with the rod-shaped jig 21 as the core are the jigs 22 of the jig member 22. Section and the tubular jig 26 are further lowered while being scissored, and the bushes M, M are wiper blade W.
It is press-fitted into the through hole H from above and below. At that time, the bushes M, the inner diameter holes 37, 3 of the M are formed at the corners of the groove 36 of the rod-shaped jig 21.
7 is pressed in while contacting.

Next, the hydraulic cylinder 25 is moved up to return the tubular jig 26 to a predetermined position, and the hydraulic cylinder 20 is retracted to leave the bushes M and M in the through holes H of the wiper blade W, respectively, and the rod jig. 21 descends and returns to a predetermined position. At that time, the groove 36 of the rod-shaped jig 21
The inner diameter holes 37, 37 of the bushes M, M are pulled out while making contact with the corners of the bushes M, M. After that, the fixing member 18 holding the wiper blade W is the B shaft member 17, the B shaft member 17 is the base 15, the base 15 is the A shaft member 14, and the A shaft member 14 is the lifting plate 13. After the hydraulic cylinder 20 retracts, the servo motor 10 rotates the ball screw 32 and the supporting member 34 supports the elevating plate 13. Then, in the r-axis direction of the stepped through-hole K in the r-axis direction in which any or all of the polar coordinates xyz of the other press-fitting location are not 0, the servo motor 12 moves the base 15 back and forth with the A-axis member 14 as a fulcrum. And the fixing member 18 for gripping the wiper blade W is tilted left and right with the B-axis member 17 as a fulcrum by the servo motor 16 so that both are parallel to the other rod-shaped jig 21 and are driven and controlled by the servo motor 4. The Y-axis member 2 and the X-axis member 6 which is driven and controlled by the servo motor 7 and the Z-axis member 9 which is driven and controlled by the servo motor 10 are position-controlled to another press-fitting location. Then, like the other press-fitting operation, the press-fitting operation is performed under the operation of the balancer 35, and the fixing member 18 returns to the original position.

The bush M press-fitted in this way,
The results of measuring the inner diameters of M, and are determined by the maximum and minimum inner diameters of one bush and their difference.

[0016]

[Table 2]

As shown in FIG.

[0018]

[Table 3]

For reference, the maximum and minimum inner diameters and the difference between the inner diameters of one bush before press fitting are shown. And

[0020]

[Table 1]

Compared with the maximum diameter and the minimum diameter of the inner diameter press-fitted by the conventional technique of No. 1 and the difference thereof, in the conventional method, there are some deviations from the permissible tolerance of the inner diameter, and also the difference between the maximum diameter and the minimum diameter of the inner diameter. Although large, the error of the inner diameter after press fitting in the method of the present invention is +30 to +45 μ for a diameter of 12 mm,
All 20 points taken out passed, and the difference between the maximum diameter and the minimum diameter was small and both were excellent. It goes without saying that the groove cross section of the rod-shaped jig may be trapezoidal, and it goes without saying that the rod-shaped jig of the present invention may be used in a conventional manner with good results.

[0022]

[Effects of the Invention] As described above, since NC posture control for front, rear, left and right is added to the press-fitting machine and a mechanism for releasing the load at the time of press-fitting is added, the press-fitting machine can cope with the press-fitting direction of any angle and improve the durability of the machine. I was able to. In addition, since a concave groove is formed in the rod-shaped jig that holds and press-fits the press-fitted parts, sufficiently satisfactory results were obtained even if the tolerance of the inner diameter after press-fitting was set tightly.

[Brief description of drawings]

FIG. 1 is an elevation view of a press-fitting machine according to the present invention.

FIG. 2 is a side view of the press-fitting machine of the present invention.

FIG. 3 is an explanatory diagram of a balancer of the press-fitting machine of the present invention.

FIG. 4 is a mounting view of the press-fitting member and the rod-shaped jig of FIG.

FIG. 5 is an external view of a wiper blade W.

FIG. 6 is a sectional view of the bush M.

FIG. 7 is a detailed view of a recessed groove of a rod-shaped jig.

FIG. 8 is an elevation view of a conventional press-fitting machine.

[Explanation of symbols]

 1 Press-Fit Machine 2 Y-Axis Member 3 Base 4 Servo Motor 5 Rail Member 6 X-Axis Member 7 Servo Motor 8 Rail Member 9 Z-Axis Member 10 Servo Motor 11 Rail Member 12 Servo Motor 13 Lift Plate 14 A-Axis Member 15 Base 16 Servo Motor 17 B-axis member 18 Fixing member 19 Mounting base 20 Hydraulic cylinder 21 Rod jig 22 Jig member 23 Frame 24 Mounting base 25 Hydraulic cylinder 26 Tubular jig 27 Pressing member 28 Mounting base 29 Hydraulic cylinder 30 Chuck hand 31 Hand member 32 Ball screw 33 Air cylinder 34 Supporting member 35 Balancer 36 Recessed groove 37 Inner hole 38 Stand 39 Hydraulic cylinder 40 Rod 41 Pushing pressure member 42 Seat 43 43 Pocket 44 Jig rod 45 Flange portion 46 Pushing pressure member W Wiper blade H Through hole K Through Hole Bush

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] March 1, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

[Title of Invention] Press-fitting machine

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine and a jig for inserting an assembly part into a hole.

[0002]

2. Description of the Related Art Generally, when a rotating shaft is assembled in a hole of a work, a part made of a wear resistant material called a bush is fitted between the through hole of the work and the shaft. Has been done. As shown in FIG. 8 which shows the state immediately before the bush is press-fitted into the work, the mounting method is as follows.
The flange portion 45 of the jig rod 44 is wrapped in the pocket 43 of the seat 42 of the pressing member 41 formed at the tip of the rod 40 of the hydraulic cylinder 39 attached to the No. 8. Then, the bush M is stabbed by the jig rod 44, and the work W
The through holes H are overlapped so as to face the bush M along a workpiece positioning jig (not shown). Then, the hydraulic cylinder 39 advances until the bush M faces the through hole H of the work W, and the jig rod 44 penetrates the through hole H. Then, another bush M is stabbed from above by the jig rod 44, and then the pushing pressure member 46 that advances and retreats from above is pushed forward to indirectly push down the work W and push the bushes M, M against the hydraulic cylinder 39. The bush M is inserted into the through hole H of the work W.

At this time, even if the outer shape of the jig rod 44 having a smooth outer peripheral shape is finished with strict accuracy, the bush M has an eccentric inner diameter and outer shape. Perhaps, the inner diameter after press fitting is

[0004]

[Table 1]

As is clear from the difference between the maximum inner diameter and the minimum inner diameter for one bush in the measurement result shown in (1), the tolerance of the inner diameter is +30 to +45 μ with respect to the diameter of 12 mm, but it is largely deviated from the tolerance, and is substantially elliptical. It was not desirable as a shaped bush after press fitting. In addition, if there are a plurality of through-hole press-fitting locations that are not parallel to the work W, the above-mentioned equipment is required for each through-hole, and if there is a design change in the through-hole angle of the work W, the remodeling equipment cost Therefore, an automatic machine that can press-fit in different directions has been desired.

[0006]

The problem to be solved by the present invention is to secure the inner diameter tolerance with sufficient accuracy when a component having an inner diameter hole such as a bush is press-fitted into a recess or through hole of a workpiece. However, even if there is a change in the shape of the concave portion or the through hole of the work, it is possible to cope with the cost at a minimum, and a single machine can cope with a plurality of press-fitting locations in different axial directions.

[0007]

To this end, in order to match the inner diameter axis of the work to be inserted with the outer diameter axis of the component to be press-fitted, 5-axis drive NC control, that is, horizontal X, Y axes, vertical Z.
In addition to the axis, it is formed with NC control of the A axis that drives the forward and backward tilt and NC control of the B axis that drives the left and right tilt. Further, a balance means is additionally provided between the work fixing member and the Z axis, and the press fit is further performed. NC including a jig member having a rod-shaped jig for holding a component at its tip and a pressing force member facing downward against the jig member
The press-fitting operation is performed by the NC control machine in which the control machine is equipped with the rod-shaped jig having a plurality of concave grooves formed on the outer periphery of the position side corresponding to the inner diameter of the press-fitting component.

[0008]

Then, when the press-fitting part is manually placed on the rod-shaped jig and the work is placed on the work-fixing member, the rod-shaped press-fitting jig and the work are automatically controlled by A and B axis control. Position of the press-fitting hole of the workpiece in parallel with the axis of the press-fitting hole of the workpiece and then in the range of the stroke of the jig member by the Z-axis control and the range of the stroke of the jig member. It is possible to place the inner diameter of the press-fitting hole and the outer diameter of the press-fitting component on the stroke line of the jig member that advances and retracts. Then, under the condition that the balance means replaces the Z-axis to support the work and no load is applied to the Z-axis, the advancing / retreating pressing member holds the press-fitting component and resists the jig member that has advanced in the press-fitting hole. And advances to press the press-fitting part into the press-fitting hole of the work. When the rod-shaped press-fitting jig and the pressing member are separated and retracted, the rod-shaped press-fitting jig is also separated from the inner diameter of the press-fitting component, and the press-fitting component becomes integral with the work. At this time, the plurality of concave grooves formed on the outer periphery of the jig work effectively, the inner diameter of the press-fitting component is ensured with high accuracy, and the work balance and the Z-axis are distorted because the balance means supports instead of the Z-axis. Nothing.

[0009]

Embodiments will now be described with reference to the drawings of embodiments of the present invention. First, the drawings will be described. FIG. 1 is an elevation view of a press-fitting machine 1 in which a JIS-B1581 (copper type 2) bush is assembled to a wiper blade which is an aluminum alloy automobile part, and 2 is a base. 3 is a Y-axis member that is driven and controlled on a rail member 5 that is placed on the rail 3 and that is relatively displaced by the servomotor 4.
An X-axis member that is driven and controlled on a rail member 8 having a similar function by a servo motor 7 on the shaft member,
Reference numeral 9 is a Z-axis member which is driven and controlled on a rail member 11 which is on the X-axis member and has a similar function by the servomotor 10. 2 is a side view of the press-fitting machine 1 of FIG. 1, in which the base 15 is tilted back and forth with the A-axis member 14 having a hinge function fixed to the elevating plate 13 of the Z-axis member 9 as a fulcrum. The servo motor is shown.

Further, the servo motor 16 can tilt the fixed member 18 for holding the wiper blade W to the left and right with the B-axis member 17 fixed to the base 15 and having a rotating function as a fulcrum. Referring back to FIG. 1, the pedestal 19 on the base 3
The rod-shaped jig 21 at the tip of the hydraulic cylinder 20
A jig member 22 for holding the is fixed vertically to the left and right. A frame 23 is erected on the pedestal 19, and a pedestal 24 above the pedestal 19 is provided with a pushing pressure member 27 for advancing and retreating from the hydraulic cylinder 25 and holding a tubular jig 26 through which the tip of the rod-shaped jig 21 penetrates. Is also installed vertically on the left and right.

A pedestal 28 is installed on the left and right pedestals 19, and a hand member 31 having a chuck hand 30 which is moved forward and backward by an air cylinder 29 is attached to the pedestal 28. In FIG. 3, a separating mechanism is provided between the lifting plate 13 and the ball screw 32 so that the force at the time of press-fitting is not applied to the Z axis, and the air cylinder 33 and the support member 34 are configured so as not to load the ball screw 32. A balancer 35 is shown. Further, FIG. 4 shows the jig member 22.
FIG. 7 is a diagram in which a rod-shaped jig 21 having a groove 36 engraved on its outer periphery is firmly attached to the tip. FIG. 5 is an external view of the wiper blade W, and shows that the two bushes M, M are press-fitted into the left and right two through holes H, K and the right through hole H.
The axial direction of the right through-hole H is 1 ° from the z axis in the x and z coordinates.
The x and y coordinates are 4 ° from the x axis, and the axial direction of the left through hole K is 9 ° from the z axis in the x and z coordinates and 4 ° from the x axis in the x and y coordinates. 6 is a sectional view of the bush M having the inner diameter hole 37, and FIG. 7 is a detailed view of the groove 36.

Next, description will be made with reference to the drawings. First of all, the bushes M, M, and
Then, the wiper blade W is set on the fixing member 18, and the switch of the NC control panel (not shown) is turned on. Then, the axial direction of the through hole H of the wiper blade W is vertically attached to the tip of the hydraulic cylinder 20, and the rod-shaped jig 21 is installed.
In order to make the tip of the rod-shaped jig 21 parallel to the vertical tubular jig 24 that penetrates, the servo motor 12 tilts the base 15 back and forth with the A-axis member 14 connecting the lifting plate 13 and the base 15 as a fulcrum. Further, the servo motor 16 tilts the fixing member 18 holding the wiper blade W to the left and right with the B-axis member 17 connecting the base 15 and the fixing member 18 as a fulcrum. The servo motor 4 drives and controls the Y-axis member 2 via the rail member 5, and the servo motor 7 drives and controls the X-axis member 6 via the rail member 8, so that the axis of the vertical through hole H is a rod-shaped jig. It is arranged at the press-fitting position directly above 21. The servo motor 10 drives and controls the Z-axis member 9 via the rail member 11, and the range of the stroke of the jig member 22 that holds the rod-shaped jig 21 at the tip and the tubular shape in which the tip of the rod-shaped jig 21 penetrates the tip. The through hole H of the wiper blade W is vertically placed within the stroke range of the pressing member 27 that holds the jig 26.

Next, pressure is applied to the air cylinder 33 of the balancer 35 so that the fixing member 18 for holding the wiper blade W is stationary, and the pressure input is made by the ball screw 3.
The servo motor 10 rotates the ball screw 32 to separate the support member 34 and the elevating plate 13 from each other in order to prevent the load from being applied to 2. Thereafter, the rod-shaped jig 21 holding the bush M is installed on the pedestal 19 on the base 3, and the hydraulic cylinder 20 pushes the rod-shaped jig 21 up through the through hole H whose axis is vertical to push up the bush. When M faces the through hole H, the chuck hand 30 holding the other bush M carries the bush M directly above the tip of the rod-shaped jig 21 by the forward movement of the air cylinder 29, and then the bush M of the wiper blade W. The chuck hand 30 is moved to the tip of the rod-shaped jig 21 penetrating the through hole H and the chuck hand 30 is retracted. Then, the tubular jig 26 is lowered by advancing the hydraulic cylinder 25, and the rod-shaped jig 2
1, the bush M, the through hole H of the wiper blade W,
The other three bushes M are further lowered while being held by the seat of the jig member 22 and the tubular jig 26, and the bushes M, M are vertically inserted into the through hole H of the wiper blade W. Press fit. At that time, the groove 36 of the rod-shaped jig 21
The inner diameter holes 37, 37 of the bushes M, M are press-fitted while being in contact with the corners of the.

Next, the hydraulic cylinder 25 is moved up to return the tubular jig 26 to a predetermined position, and the hydraulic cylinder 20 is retracted to leave the bushes M and M in the through holes H of the wiper blade W, respectively, and the rod jig. 21 descends and returns to a predetermined position. At that time, the groove 36 of the rod-shaped jig 21
The inner diameter holes 37, 37 of the bushes M, M are pulled out while making contact with the corners of the bushes M, M. After that, the fixing member 18 holding the wiper blade W is the B shaft member 17, the B shaft member 17 is the base 15, the base 15 is the A shaft member 14, and the A shaft member 14 is the lifting plate 13. After the hydraulic cylinder 20 retracts, the servo motor 10 rotates the ball screw 32, and the supporting member 34 supports the lift plate 13 that has descended when the press-fitting is slightly performed.
Then, the base 15 is tilted back and forth with the A-axis member 14 as a fulcrum by the servo motor 12, and the fixing member 18 that holds the wiper blade W is tilted left and right with the B-axis member 17 as a fulcrum by the servo motor 16 so that both of them are left. The axial direction of the through hole K at the left press-fitting place is parallel to the rod-shaped jig 21 of No. 2, and the Y-axis member 2 and the servo motor 7 which are driven and controlled by the servo motor 4 are controlled.
The position is controlled to the left press-fitted position by the X-axis member 6 which is driven and controlled by the Z axis member 9 which is driven and controlled by the servomotor 10. And the balancer 35 as well as the press-fitting work on the right
Then, the fixing member 18 returns to its original position.

The bush M inserted in this way,
The results of measuring the inner diameters of M ,, and are calculated to find the error between the maximum and minimum diameters of one bush and their difference.

[0016]

[Table 2]

Twenty points are shown in FIG.

[0018]

[Table 3]

For reference, the error between the maximum inner diameter and the minimum inner diameter of one bush before press fitting and the difference between them are shown at 20 points. And

[0020]

[Table 1]

Comparing 20 points of the present invention with the maximum and minimum inner diameters of one bush press-fitted by the conventional technique and 20 points of the present invention, the conventional method greatly deviates from the allowable tolerance of the inner diameter. There is also a large difference between the maximum diameter and the minimum diameter of the inner diameter, but the error of the inner diameter after press-fitting in the method of the present invention is +30 to +45 μ for a diameter of 12 mm,
All 20 points taken out passed, and the difference between the maximum diameter and the minimum diameter was small and both were excellent. It goes without saying that the groove cross section of the rod-shaped jig may be trapezoidal, and it goes without saying that the rod-shaped jig of the present invention may be used in a conventional manner with good results.

[0022]

[Effects of the Invention] As described above, since NC posture control for front, rear, left and right is added to the press-fitting machine and a mechanism for releasing the load at the time of press-fitting is added, the press-fitting machine can cope with the press-fitting direction of any angle and improve the durability of the machine. be able to. Further, since the groove is formed in the rod-shaped jig that holds and press-fits the press-fitted parts, sufficiently satisfactory results can be obtained even if the tolerance of the inner diameter after press-fitting is tightly set.

[Brief description of drawings]

FIG. 1 is an elevation view of a press-fitting machine according to the present invention.

FIG. 2 is a side view of the press-fitting machine of the present invention.

FIG. 3 is an explanatory diagram of a balancer of the press-fitting machine of the present invention.

FIG. 4 is a mounting view of the press-fitting member and the rod-shaped jig of FIG.

FIG. 5 is an external view of a wiper blade W.

FIG. 6 is a sectional view of the bush M.

FIG. 7 is a detailed view of a recessed groove of a rod-shaped jig.

FIG. 8 is an elevation view of a conventional press-fitting machine.

[Explanation of symbols] 1 press-fitting machine 2 Y-axis member 3 base 4 servo motor 5 rail member 6 X-axis member 7 servo motor 8 rail member 9 Z-axis member 10 servo motor 11 rail member 12 servo motor 13 lift plate 14 A-axis Member 15 Base 16 Servo motor 17 B-axis member 18 Fixing member 19 Mounting base 20 Hydraulic cylinder 21 Rod jig 22 Jig member 23 Frame 24 Mounting base 25 Hydraulic cylinder 26 Tubular jig 27 Pushing pressure member 28 Mounting base 29 Air cylinder 30 Chuck Hand 31 Hand member 32 Ball screw 33 Air cylinder 34 Supporting member 35 Balancer 36 Recessed groove 37 Inner diameter hole 38 Frame 39 Hydraulic cylinder 40 Rod 41 Pushing pressure member 42 Seat 43 Pocket part 44 Jig rod 45 Flange part 46 Pushing pressure member W Wiper blade H Hole K through hole M Bush

Claims (3)

[Claims] 1. A press-fitting machine comprising a work fixing member and a press-fitting member for advancing and retracting, which is driven by a servomotor to perform NC control of the X, Y, and Z axes, and left and right by an A-axis and a servomotor which drive-control the longitudinal movement by the servomotor. A press-fitting machine comprising a B-axis for driving and controlling tilting and a balance means for supporting the work fixing member on the Z-axis. 2. A rod-shaped jig which is used when inserting a component having a through hole into a concave portion or a through hole of a work and holds the component and secures an inner diameter, and which is located at a position side corresponding to the inner diameter of the component. A rod-shaped jig having a plurality of grooves formed on the outer circumference of the jig. 3. The press-fitting jig according to claim 2, wherein the concave groove has a rectangular cross section.