JP2551696Y2 - Roll press type caulking device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll press-type caulking device for caulking an annular member around the outer periphery of a shaft-shaped member.

[0002]

2. Description of the Related Art For example, a hydraulic cylinder for power assist is used in the front and rear wheel portions of a 4WS unit. When manufacturing a piston for this hydraulic cylinder, the piston is attached to the outer periphery of a shaft-like work. The annular member is caulked using a roll press caulking device.

[0003] By the way, as a roll press type caulking device, a device for caulking an annular member on the outer periphery of a shaft-shaped work using a caulking unit having three pressure rollers has been well known (for example, Showa 55-9844
No. 8).

[0004]

When caulking is performed by using a caulking unit having three processing rollers as in the above-mentioned known example, as shown in FIG.
01 and a pair of pressure rollers 1 so as to face each other
02, 102 and one pressure roller 103,
By making the pair of pressure rollers 102, 102 and one pressure roller 103 relatively approach each other, the work 10
It is customary to employ a method in which the work 101 is crimped to a predetermined position by being pressed against the first crimping position.

However, in the case of a hydraulic cylinder piston, the diameter of the shaft member as a work differs depending on the model. In the case of the above-mentioned method, when the outer diameter of the work 101 or 101 'to be crimped changes, one by one. The contact point between the set of pressure rollers 102, 102 and one work 101 will be changed.

That is, the point of contact between the pressure rollers 102, 102 and the workpiece 101 or 101 'differs between when the workpiece 101 having a small diameter is caulked and when the workpiece 101' having a large diameter is caulked. However, since the contact point between one pressure roller 103 and the work 101 or 101 ′ does not change, a pair of two pressure rollers 102 1
A movement amount S ₁ of 02, so that the movement amount of one of the pressure roller 103 S ₂ and is different from.

In such a case, the pressure rollers 102, 10
2 and the feed ratio of the pressure roller 103 are equal,
It is necessary to change the pressure rollers 102, 102 to one having a larger diameter. If the pressure rollers 102, 102 are not changed, the feed ratio between the pressure rollers 102, 102 and the pressure roller 103 is changed. Needs to be changed, which causes a problem that workability is reduced.

On the other hand, in the case of a piston for a hydraulic cylinder,
As shown in FIGS. 13A and 13B, the shape of the work 111 or 111 '(that is, the
Since the length of 2 ′ and the swaging position of the annular member 113 or 113 ′) differ depending on the model, the work 111 is swaged between the work 111 and the work 111 ′ when the work 111 is swaged. Since the processing position A is fixed, it is necessary to perform a step change for replacing the work receiver 114 or 114 'and the center head 115 or 115' for supporting each in a centered state. Is reduced.

[0009] As described above, in any case, it is necessary to manually change the apparatus.
This is a bottleneck in improving productivity in the case of randomly producing parts (for example, pistons) used for different types (for example, hydraulic cylinders), and is a problem that needs to be solved.

The present invention has been made to solve the above-mentioned problems, and has as its object to improve the productivity by eliminating the step change by manual operation.

[0011]

According to the present invention, as a means for solving the above-mentioned problems, a work comprising a shaft member and an annular member positioned at a predetermined position on the outer periphery of the shaft member is centered. A work supporting member for supporting the work, and a work support member disposed on both sides of the work so as to face each other and being relatively close to each other from a direction orthogonal to the work to caulk the annular member;
In a roll pressure type caulking device including a set of pressure rollers and a caulking unit including one pressure roller, the caulking unit or the work supporting member is supported movably in the moving direction of the pressure roller. Floating support means, a caulking position detecting means for detecting a caulking position in the work supported by the work supporting member, and the work supporting member for positioning the caulking position of the work at a caulking position by the caulking unit. And driving means for moving.

[0012]

According to the present invention, the following effects can be obtained by the above means.

That is, since the caulking unit or the work supporting member is floatingly supported so as to be movable in the moving direction of the pressure roller, the outer diameter of the work (specifically, the caulking portion of the shaft-shaped member) is changed. Even if
The displacement of the center of the caulking caused by the pressure roller can be automatically absorbed, and the caulking position detecting means detects the caulking position of the work supported by the work supporting member, and determines the caulking position of the caulking unit. In this way, even when the entire length of the work or the swaging position changes, the swaging position of the work can be automatically set.

[0014]

According to the present invention, the caulking unit or the work supporting member is floatingly supported so as to be movable in the moving direction of the pressure roller, and the caulking unit or the work supporting member is supported by the work supporting member by the caulking position detecting means. Since the swaging position in the work is detected and the swaging position can be moved to the swaging position of the swaging unit, even when the outer diameter of the work (specifically, the swaging portion of the shaft-shaped member) changes. In addition, the displacement of the caulking center due to the pressure roller can be automatically absorbed, and even if the entire length of the work or the caulking position changes, the caulking position of the work can be set automatically. However, there is no need for man-hours for changing the work, and the productivity when mixing multiple models is greatly improved. There is an effect.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

Embodiment 1 FIGS. 1 to 4 show a roll press type caulking device according to Embodiment 1 of the present invention.

The roll pressing type caulking device of this embodiment is for caulking the annular member 7 of the workpiece W in which the annular member 7 is positioned at a predetermined position of the shaft member 6. A work supporting member 2 supported on the front surface of the machine 1 so as to be movable in a vertical direction, and a caulking device supported on a receiving table 1a protruding forward from a lower portion of the front surface of the machine base 1 via floating support means 3 described later. A unit 4 and a drive unit 5 for raising and lowering arranged in the machine base 1 for raising and lowering the work supporting member 2 are provided.

The work supporting member 2 is formed of a U-shaped frame, and a pair of upper and lower guide members 8, 8 protruding from the back of the vertical portion 2a is disposed on the front of the machine base 1. It is slidably and loosely fitted on the vertical guide rail 9 so as to be vertically movable on the front of the machine base 1.

The upper horizontal portion 2b of the work supporting member 2
A center head 10 for centering and supporting the upper end of the shaft-like member 6 in the work W is supported so as to be able to move up and down. The center head 10 is provided with an air cylinder 1 for moving up and down.
Connected to 1. Reference numeral 12 denotes the center head 10
(In other words, the shaft member 6)
(Upper end position of the first position).

The lower horizontal portion 2c of the work supporting member 2 is provided with a work receiver 13 for supporting the lower end of the shaft member 6 of the work W.

In the above configuration, the work W is supported by the center head 10 and the work holder 13 at the upper and lower ends thereof, and is supported in a centered state with respect to the work support member 2. Therefore, the center head 10 and the work receiver 13 in the state of being returned to the origin position.
Is set to be larger than the work W having the maximum length.

On the front surface of the machine base 1, one side of the work supporting member 2 above the caulking unit 4.
A support portion 1b facing the left side (in the present embodiment) is protrudingly provided. The support portion 1b has a crimping position (that is, the annular member 7) of the work W supported by the work support member 2. ) Is supported so as to be able to move up and down.

The caulking position detecting unit 14 is provided on the slider 16 so as to be vertically movable with respect to vertical guide rails 15, 15 provided on the support portion 1b of the machine base 1. A horizontal slider 18 which is movably supported by the provided horizontal guide rails 17 and 17 and has a locking claw 19 at the lower end thereof which comes into contact with the caulking position (that is, the annular member 7) of the work W. It is constituted by. Reference numeral 20 denotes an air cylinder for lifting and lowering, 21 denotes an air cylinder for horizontal movement, and 22 denotes a second position detecting means for detecting an amount of descent from the origin position of the caulking position detection unit 14 (in other words, the caulking position). is there. In the present embodiment, the caulking position detection unit 14
Is supported so as to be able to move up and down with respect to the support portion 1b of the machine base 1, but may be supported so as to be able to move up and down with respect to the work supporting member 2.

The caulking unit 4 is disposed on both sides of the work W supported by the work supporting member 2 so as to face each other, and is relatively positioned from a direction perpendicular to the work W to caulk the annular member 7. A pair of pressure rollers 23 and 23 and one pressure roller 24 are provided adjacent to each other.

The pressure roller 24 is arranged on the horizontal center line X (see FIG. 3) of the work W, while the pressure rollers 23 are arranged symmetrically with respect to the horizontal center line X. I have.

The pressure rollers 23 are rotatably supported by a first base 25, and a roller drive motor 26 provided on the first base 25.
Is driven to rotate. The rotational force of the roller drive motor 26 is applied between the pressure rollers 23, 23 and the roller drive motor 26.
A gear mechanism (not shown) for transmitting power to the motor is provided.

On the other hand, the pressure roller 24 is provided on the second base table 2 which is disposed at a position facing the first base table 25.
7 is rotatably supported. The pressure roller 2
4 is to be rotated as the work W is rotated by the pressure contact of the pressure rollers 23, 23, and the pressure rollers 23, 23 are on the driving side, and the pressure roller 24 is on the driven side. Has become.

As shown in FIG. 3, the second base 27 is divided into a front base 27a and a rear base 27b. The front and rear bases 27a and 27b
They are connected via 8,28. The pressure roller 24 is supported on the front end of the front base 27a, while the rear base 27b is provided with a load cell 29 for detecting the pressing force of the pressure rollers 23, 23 and 24. . The connection by the connecting member 28 is not fixed, but allows a slight relative movement of the front and rear base tables 27a and 27b so that the pressing force can be detected by the load cell 29.

The first base table 25 and the second base table 27 are supported by the feed mechanism 30 so as to be movable in the direction of relative approach or in the direction of relative separation. The feed mechanism 30 includes a pair of threaded portions 31a and 31b formed to be opposite threads at a predetermined distance from each other, and a rod 31 extending in the same direction as the horizontal center line X. It is constituted by a rotation driving means 32 for rotationally driving (see FIG. 4).

A screw tube 33 integrally projecting from the lower surface of the first base 25 is screwed into one (left side in the figure) screw portion 31a of the rod 31. In the illustrated case, the screw portion 31b on the right side)
A screw cylinder 34 integrally projecting from the lower surface of the rear base 27b of the base 27 is screwed. Therefore, the forward or reverse rotation of the rod 31 causes the first base table 25 and the second base table 27 to move in the direction of relative approach or in the direction of relative separation. Reference numeral 49 denotes a guide cylinder for slidably supporting the first base 25 on the rod 31.

The rotation driving means 32 is provided on a driven sprocket wheel 35 pivotally attached to one end (the right end in the drawing) of the rod 31 and protrudes from the lower front end of the machine base 1. Motor 3 mounted on motor support base 38
7 (see FIG. 1), and a chain 36 suspended between a driving sprocket wheel 39 and a driven sprocket wheel 35 pivotally mounted on a rotation shaft 37a of the motor 37.
And is constituted by.

The floating support means 3 includes a pair of slide rails 41, 41 mounted on a receiving table 1 a of the machine base 1 via a support frame 40 and extending in the moving direction of the caulking unit 4. , 41 are slidably loosely fitted to the first base table 25 and the second base table 27, and are fixed to the lower surfaces of the second base table 27. In addition,
First base table 25 and second base table 2 in support frame 40
7, a notch 43 is formed from the front side so that the work W can be loaded and unloaded. Therefore, one of the slide rails 41, 41 located on the front side is divided into right and left via the cutout 43.

In this embodiment, the second base 2
A guide plate 44 for rotatably supporting the rod 31 and moving with the rod 31 is provided between the slide rail 4 and the driven sprocket wheel 7.
It is provided so as to be slidably supported by 1,41. The support frame 4 is provided on the front side of the guide plate 44.
A hanging piece 45 facing the front side of the hanging piece 45 is integrally provided, and a pair of stoppers 46 engaging with the hanging piece 45 is provided on both left and right sides of the hanging piece 45 on the front surface of the support frame 40.
46 are provided. As a result, the horizontal movement amount of the caulking unit 4 supported by floating can be restricted from exceeding the allowable range.

Further, the two base tables 2 are located at opposing positions of the first base table 25 and the second base table 27.
In order to prevent the pressure rollers 23, 23 and the pressure roller 24 from interfering with each other when the elements 5 and 27 are relatively close to each other, an engagement piece 47 and a proximity switch 48 are attached.
When the two bases 25 and 27 are abnormally close to each other, the engagement piece 47 is brought into contact with the proximity switch 48, and the operation of the proximity switch 48 stops driving the motor 37.

The lifting / lowering drive means 5 comprises a motor 50 provided in the base 1 and a screw shaft 51 which rotates in conjunction with the motor 50. A screw tube 53 is provided at an end of a bracket 52 fixed to the back of the vertical portion 2a of the work support member 2, and the screw tube 53 is attached to the screw shaft 5
1 is screwed. Thus, when the screw shaft 51 is rotated forward and backward by the forward and reverse rotation of the motor 50, the work supporting member 2 is moved up and down. Reference numeral 54 denotes a bearing that rotatably supports the screw shaft 51.

Next, the operation of the roll press type caulking device configured as described above will be described with reference to FIGS.

First, after lowering the work supporting member 2 to the lower limit, the lower end of the shaft-like member 6 of the work W is supported by the work receiving member 13 of the work supporting member 2. At this time, the air cylinders 11, 20, and 21 are at the operation origin, and the first base table 25 and the second base table 27 are at the most distant positions.

After that, the air cylinder 11 is operated to lower the center head 10, and the shaft member 6 of the workpiece W is moved.
The upper end is centered and supported, and the lowering amount a of the center head 10 at this time is detected by the first position detecting means 12. Then
Initial state (that is, the state before the operation of the air cylinder 11)
Since the distance L ₀ between the center head 10 and the work receiver 13 is determined, the total length x of the work W can be obtained from x = L ₀ −a based on the amount of descent a.

Next, the air cylinder 21 is operated to move the horizontal slider 18 in the caulking position detecting unit 14.
Is moved to the work W side, the air cylinder 20 is operated to lower the elevating slider 16, and the locking claw 19 of the horizontal slider 18 abuts on the upper surface of the annular member 7. At this time, the lowering amount b of the lifting slider 16 is detected by the second position detecting means 22. Then, the initial state (i.e., pre-operation state of the air cylinder 11, 20) the distance L ₁ is determined between the center head 10 and the locking claw 19 in the axial shape of the workpiece W by the descent amount b The length x ₁ of the member 6 above the annular member 7 is x ₁ = (L ₁ + b)
Required from -a.

On the other hand, since the distance L ₂ between the swaging position A in the swaging unit 4 and the center head 10 in the initial state is also determined, the annular member 7 in the work W is determined.
Work increase amount c for positioning of the crimping position in the swaging position A, is determined from _{c = x 1 + a-L} 2.

The work lift amount obtained as described above
If the work supporting member 2 is raised by driving the lifting / lowering drive means 5 based on c, the work lifting amount c for positioning the swaging position of the annular member 7 on the work W at the swaging processing position A is c. = determined from x ₁ + a-L _2.

The work lift amount obtained as described above
If the work supporting member 2 is raised by driving the lifting / lowering drive means 5 based on c, the swaging position of the annular member 7 in the work W is automatically positioned at the swaging position A of the swaging unit 4. Become. That is, as in the conventional example, when the swaging position of the work W is changed, the swaging position of the work W is automatically changed to the swaging position of the swaging unit 4 without changing the center head 10 and the work receiver 13. It can be positioned. That is, in the case of the present embodiment, the first position detecting means 12 and the second position detecting means 22 constitute a caulking position detecting means in the claims for utility model registration.

Note that, as described above, the total length x of the work W
When, as long from the annular member 7 in the shaft-like member 6 of the workpiece W required above the length x _1, because the model of the workpiece W can be determined, only the work increase amount c with respect to the reference of the corresponding model of the workpiece support member 2 You may make it rise. Further, when the caulking pressure differs depending on the model, the caulking pressure can be automatically changed based on the model detection by the above method.

Next, the caulking is performed in the following manner.

The roller drive motor 26 is driven to rotate the pressure rollers 23, 23,
(In other words, the motor 37) is driven to operate the feed mechanism 30.

Then, the first base table 25 and the second base table 27 are moved in the direction of relative approach, and the pressure rollers 23, 23 and the pressure roller 24 are moved in the direction of relative proximity. Rollers 23, 23 or pressure roller 2
4 (in the case of the present embodiment, the pressure roller 24) is pressed against the crimping position of the work W. At this time, a slight gap remains between the pressure rollers 23, 23 and the swaging position of the work W (see the dashed line in FIG. 6).

In this state, the operation of the feed mechanism 30 is further continued. In this case, since the caulking unit 4 is floatingly supported, the caulking unit 4 moves in the direction from the second base 27 and moves. , Pressure roller 2
3, 23 are pressed against the swaging position of the work W.

Therefore, the pressure rollers 23, 23 and the pressure roller 24 are pressed against the crimping position of the work W, and the crimping unit 4 performs the crimping process to the crimping position of the work W. The caulking pressure at this time is detected by the load cell 29 and is controlled to a predetermined value.

When the pressure rollers 23, 23 and the pressure roller 24 are relatively close to each other by the operation of the feed mechanism 30, when the pressure rollers 23, 23 are pressed against the crimping position of the work W first. , The caulking unit 4 floatingly supported moves in the opposite direction.

According to the above, even when the outer diameter of the work W (specifically, the caulking portion of the shaft-like member 6) changes, the center of the caulking by the pressing rollers 23, 23 and the pressing roller 24 is maintained. The gap can be automatically absorbed.

Second Embodiment FIGS. 7 to 10 show a roll press type caulking device according to a second embodiment of the present invention.

In this embodiment, the first base 25 in the caulking unit 4 is fixed.

That is, as shown in FIGS. 9 and 10, the rod 31 constituting the feed mechanism 30 is attached to the second base table 2.
Only the threaded portion 31b on the seventh side is formed, and the rod 31 is provided with bearings 55, 55 fixed on the support frame 40 at both ends.
It is rotatably supported by. The second base 27 is slidably supported by a pair of guide rails 56 extending in the direction in which the second base 27 moves. Therefore, only the second base 27 is moved in the left-right direction by the action of the feed mechanism 30. Note that the guide plate 44, the hanging piece 45, and the stopper 46 that existed in the first embodiment are omitted because they are unnecessary.

On the other hand, the work supporting member 2 is floatingly supported on the base 1 via the floating supporting means 3.

That is, the floating support means 3 is interposed between the base 1 and the vertical guide rail 9 which supports the work supporting member 2 so as to be able to move up and down.

The floating support means 3 of this embodiment is
A pair of upper and lower horizontal guide rails 5 fixed to the front of the base 1
7, 57 and guide members 58, 58 fixed to the rear surface of the vertical guide rail 9 and slidably fitted to the horizontal guide rails 57, slidably. Reference numeral 59 denotes a return air cylinder for returning the moved work support member 2. Other configurations are the same as in the first embodiment.

The positioning of the swaging position of the work W in the present embodiment is the same as that in the first embodiment, and a description thereof will be omitted. Hereinafter, the swaging process by the swaging unit 4 will be described with reference to FIG.

While the roller driving motor 26 is driven to rotate the pressure rollers 23, 23, the rotation driving means 32
(In other words, the motor 37) is driven to operate the feed mechanism 30.

Then, the second base table 27 is moved in a direction approaching the first base table 25, and the pressure roller 2 is moved.
4 is pressed against the swaging position of the work W.

When the operation of the feed mechanism 30 is further continued in this state, the work supporting member 2 is floatingly supported, so that the work supporting member 2 (in other words,
The work W) is moved to the first base table 25 side,
The pressure rollers 23, 23 are pressed against the swaging position of the work W (see the dashed line in FIG. 11). In the above process, the pressure roller 24 is the home position (i.e., the solid line position shown) from the work crimping position (i.e., the chain line position shown) is moved by the movement amount y ₁ up, the workpiece W is the home position (i.e., the solid line shown position) from the work crimping position (i.e., is moved by the movement amount y ₂ to the chain line position shown).

Therefore, the pressing rollers 23, 23 and the pressing roller 24 are pressed against the swaging position of the work W, and the swaging unit 4 performs the swaging process to the swaging position of the work W. The caulking pressure at this time is detected by the load cell 29 and is controlled to a predetermined value.

According to the above, even when the outer diameter of the work W (specifically, the caulked portion of the shaft-shaped member 6) changes, the center of the caulking by the pressing rollers 23, 23 and the pressing roller 24 is maintained. The gap can be automatically absorbed.

The invention of the present application is not limited to the configuration of each of the above embodiments, and it is needless to say that the design can be changed as appropriate without departing from the gist of the invention.

[Brief description of the drawings]

FIG. 1 is a front view of a roll press type caulking device according to a first embodiment of the present invention.

FIG. 2 is a front view of the roll press type caulking device according to the first embodiment of the present invention.

FIG. 3 is a schematic plan view of a caulking unit in the roll press type caulking device according to the first embodiment of the present invention.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is an operation explanatory diagram illustrating a process of positioning a swaging position of a work by the roll pressing type swaging apparatus according to the first embodiment of the present invention.

FIG. 6 is an operation explanatory diagram illustrating a process of performing a work crimping process by the roll press-type caulking device according to the first embodiment of the present invention.

FIG. 7 is a front view of a roll press type caulking device according to a second embodiment of the present invention.

FIG. 8 is a front view of a roll press type caulking device according to a second embodiment of the present invention.

FIG. 9 is a schematic plan view of a caulking unit in a roll press-type caulking device according to a second embodiment of the present invention.

FIG. 10 is a sectional view taken along line XX of FIG. 9;

FIG. 11 is an operation explanatory diagram illustrating a process of performing a work crimping process by the roll press type caulking device according to the second embodiment of the present invention.

FIG. 12 is an operation explanatory diagram for explaining a process of performing a caulking process on a workpiece by a conventional roll press type caulking device.

FIG. 13 is an explanatory diagram of a case where a different type of work is centered and supported by a conventional roll press type caulking device.

[Explanation of symbols]

2 is a work supporting member, 3 is a floating supporting means, 4
Is a caulking unit, 5 is a driving means, 6 is a shaft-like member, 7 is an annular member, 10 is a center head, 12 is a first position detecting means, 13 is a work receiver, 22 is a second position detecting means, 2
3 and 24 are pressure rollers and W is a work.

Claims (1)

(57) [Scope of request for utility model registration] 1. A work supporting member for supporting a work comprising a shaft member and an annular member positioned at a predetermined position on the outer periphery of the shaft member in a centered state, and disposed opposite to each other on both sides of the work. And a caulking unit comprising a pair of pressurizing rollers and a pressurizing roller which are relatively close to each other in a direction perpendicular to the workpiece in order to caulk the annular member. Floating support means for movably supporting the caulking unit or the work supporting member in the direction of movement of the pressure roller, and caulking position detecting means for detecting a caulking position in a work supported by the work supporting member. Driving means for moving the work support member so as to position the swaging position of the work at the swaging position by the swaging unit. A roll press-type caulking device, which is provided.