JPH06346933A - Variable mold device in camber molding machine of plate spring - Google Patents

Abstract

PURPOSE:To provide a variable mold device simple in structure and inexpensive capable of shortening a length of time required to change a mold stage at the time of changing an order. CONSTITUTION:On a main body frame 21, a variable molding die 22 to constitute an upper die is arranged in a vertically movable manner. Additionally, on the main body frame 21, a die providing device 23 to provide a required die shape on its lower surface by way of adjusting positions of a large number of molding fingers 31 constituting the variable molding die 22 is arranged free to move. Below the variable molding die 22, a variable die member 25 constituting a lower die capable of copying the die shape formed on the lower surface of the variable molding die 22 is arranged. On a plate spring supplied from a preceding process to between the variable molding die 22 and the variable die member 25 by a transfer and placing device such as a manipulator and others, a required camber is provided by forcibly bringing the variable molding die 22 close to the variable die member 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable mold device for a leaf spring camber molding machine, and more particularly to a camber molding machine equipped with a variable molding die capable of varying the camber shape applied to the leaf spring. The present invention relates to a variable mold device having a simple structure capable of changing the camber shape of the variable mold in a short time.

[0002]

2. Description of the Related Art As shown in FIG. 17, a suspension device formed by laminating a plurality of leaf springs 10 is preferably used for a land mobile vehicle such as a railway or a truck. This leaf spring 10
Is a state in which the plate is rolled to the required thickness, after being subjected to the required process, for example, forming "eyeballs" at one or both ends of the plate or forming a taper at the other end, and then heating the whole The required "sledding", ie, camber, is added at.
There are various types of camber, such as a model in which the curvature gradually decreases from the center to the left and right, a model in which the curvature gradually increases, and a model in which the central part becomes flat, depending on the application and load stress. To do.

FIG. 18 shows an example of a conventional molding device 12 for imparting the camber to the leaf spring 10. The molding device 12 is basically composed of an upper mold 14 and a lower mold 16. , One upper mold 14 has a female mold shape,
The other lower mold 16 is formed with a male mold shape. Then, between the upper mold 14 and the lower mold 16, the straight leaf spring 10 heated to the hot working temperature is faced, and then the upper mold 1
By forcing 4 to approach the lower mold 16,
The leaf spring 10 is provided with a camber that follows the mold shapes of both molds 14 and 16.

[0004]

As a method for manufacturing the leaf spring 10, the leaf spring 10 having the same shape and the same standard is used.
A method for continuously manufacturing each group (referred to as “group sink” in industry term) and a method for manufacturing the parent spring 10 and the child spring 10 constituting the suspension device in a lot for each family (industrial term) Called "family sink"). Which method is used for manufacturing is appropriately selected according to the application of the user and other factors. In this case, in the group-flow manufacturing method, after manufacturing a large number of leaf springs 10 having the same shape by the required number of lots, only when the shape of the camber is changed by changing the order, the upper mold 14 and the lower mold 14 of the molding apparatus 12 are manufactured. The mold 16 will be replaced. The setup time required for this mold replacement generally requires a lot of time, which is the leaf spring 1.
This was a factor that markedly reduced the efficiency in the 0 camber molding operation. In particular, when small-lot production becomes frequent as it is nowadays, it is necessary to deal with the order change accompanying it, and it is extremely important in the leaf spring manufacturing industry to shorten the setup change time in the die change work.

According to the manufacturing method of the family sink, every time one leaf spring 10 is manufactured, the next leaf spring 10 is manufactured.
Since the camber of the above is slightly different, the upper mold 14 and the lower mold 16 must be exchanged. Therefore, this also has the drawback of being extremely complicated and increasing the loss time. In this respect, the conventional molding apparatus has not sufficiently met the demands of the industry. Further, in both the group sink and the family sink, the upper mold 14 and the lower mold 16 corresponding to the shapes of various cambers are required respectively, and there is a drawback that the manufacturing cost is increased. In addition, it is necessary to store each mold according to its shape, which requires a large space for storing the mold, and problems such as complicated inventory management are pointed out. Furthermore, the upper mold 14
When the lower die 16 is used for a long period of time, the die forming surface is worn over time and the shape of the die is deformed.
It may not be possible to give a proper camber to the. In this case, both molds 14 and 16 need to be repaired or replaced, but this work takes time, which also causes a decrease in production efficiency.

Therefore, one proposal for coping with the above-mentioned various problems has been filed by the applicant of the present invention as an invention "a method and apparatus for forming a camber of a leaf spring". In the molding apparatus according to the previous application, a holding body is arranged to be movable up and down on a base frame that forms the main body of the apparatus, and a large number of molding fingers are arranged on the holding body so as to be vertically movable. The position of each forming finger is adjusted via each servo motor and screw shaft arranged corresponding to the holder, so that a required continuous camber shape is formed as a whole at the open end of the forming finger group. Has become. According to the forming apparatus having this configuration, when the camber shape given to the leaf spring is changed when the order is changed, it is possible to deal with the change by simply adjusting the positions of the plurality of forming fingers, and the setup change time can be shortened. Further, since it is not necessary to prepare a mold for each shape, inventory management becomes easy, and it is possible to eliminate the need for mold modification and replacement.

However, in the molding apparatus, since the servo motors for adjusting the positions of the molding fingers are arranged by the number corresponding to each finger, there is a drawback that the cost is increased and the mechanism is complicated. Further, when a camber is applied to the leaf spring by the forming finger, a large load is applied to the forming finger, but at this time, the screw shaft for adjusting the position of the finger is also subjected to the load and may be damaged. there were.

[0008]

DISCLOSURE OF THE INVENTION The present invention has been proposed in order to suitably solve the above problems inherent in forming a camber on the above-mentioned leaf spring in view of the problems inherent therein, and is accompanied by an order change. It is an object of the present invention to provide a variable type device which has a simple structure and can reduce the time required for die changeover.

[0009]

SUMMARY OF THE INVENTION In order to overcome the above-mentioned problems and achieve an intended object, the present invention is directed to a movable frame which is vertically movable in a main frame of a camber molding machine and a movable frame. In the camber molding machine, which is provided with a large number of molding fingers arranged so as to be adjustable up and down, and which forms a required mold shape to be applied to the leaf springs at the open end of this molding finger group, is arranged on the moving frame. A guide that is provided and extends in the longitudinal direction of the leaf spring, a number of support members that are movably disposed in the guide along the longitudinal direction, and opposes one of the adjacent support members of the support member. And a concave groove formed on the side surface, into which the forming finger is fitted so as to move up and down, and a forming finger that is disposed in the support member and always faces the concave groove, and regulates the lowering of the finger. Along with this, a regulating member that is moved to a position allowing the lowering of the forming fingers by the release means and the main body frame are arranged to adjust the respective forming fingers up and down with respect to the support member, and then to the open end of the forming finger group. A die applying device that imparts a desired die shape and a plurality of support members that are disposed on the movable frame and are pressed against each other to position and fix the forming finger group to which the required die shape is applied so that they cannot be moved. It is characterized in that it is composed of a detachable fixing means.

[0010]

EXAMPLES Next, preferred examples of the variable type apparatus in the leaf spring camber molding machine according to the present invention will be described.
The following is a description with reference to the accompanying drawings. For convenience of explanation, the terms “front and rear” and “right and left” are referred to in the relationship in FIG. 1.

[0011]

[Overall Configuration] FIG. 1 is a schematic configuration diagram showing a preferred embodiment of a camber molding machine that employs a variable mold device according to the present invention. The camber molding machine 20 includes a gate-shaped main body frame 21 shown in the figure, which includes a variable molding die 22 that constitutes an upper mold and a mold imparting device 23 that imparts a desired die shape to the lower surface of the variable molding die 22. The variable type device 24 is provided. Further, below the variable molding die 22, a variable mold member 25 that constitutes a lower mold that can follow the shape of the mold formed on the lower surface of the variable molding die 22 is disposed. And a transfer device (not shown) such as a manipulator from the previous process
In the leaf spring 10 supplied between the variable mold 22 and the variable mold member 25, the variable mold 22 is attached to the variable mold member 25.
The required camber is provided by forcibly approaching to.

[0012]

[Variable Mold] As shown in FIG. 2, a horizontal pillar 21b is disposed between the left and right vertical pillars 21a, 21a of the main body frame 21 so as to project toward the upper end front surface thereof. Two main hydraulic cylinders 26, 26 are arranged in an inverted state at a predetermined distance in the longitudinal direction. A moving frame 27 is vertically movable between the vertical columns 21a, 21a at a position facing the horizontal column 21b, and the main hydraulic cylinders 26, 2 are provided at the upper ends of the moving frames 27.
Six piston rods 26a, 26a are connected.
Therefore, when the main hydraulic cylinders 26, 26 are synchronously biased in the forward and reverse directions, the moving frame 27 moves up and down in parallel along the vertical columns 21a, 21a (see FIGS. 12 and 13). An air cylinder 28 is arranged upside down at a position facing the outside of the position where each main hydraulic cylinder 26 is arranged on the horizontal column 21b, and its piston rod 28a is connected to the moving frame 27. The air cylinder 28 functions to balance the lifting and lowering of the moving frame 27.

As shown in FIG. 2, a pair of guides 29, 29 having a U-shaped cross section are disposed on the moving frame 27 so as to face each other at a predetermined distance in the front-rear direction.
Along the longitudinal direction. And this guide 2
A large number of supporting members 3 formed in a rectangular plate shape between 9 and 29
0 is slidably arranged along the longitudinal direction of the guides 29, 29. As shown in FIG. 4, a concave groove 30a extending in the vertical direction is formed on one side surface (one side surface in the thickness direction) of the supporting member 30 facing the adjacent supporting member 30, and the concave groove 30a has a plate shape. The molding fingers 31 of are fitted in such a manner that they can slide vertically. The depth dimension of the concave groove 30a is set to be slightly shallower than the thickness dimension of the forming finger 31, and when a large number of supporting members 30 are pressed against each other by hydraulic cylinders 40, 40, which will be described later, each forming finger 3 is pressed.
1 is sandwiched so that it can be immovably fixed.

A recess 32 having the shape shown is formed in the support member 30 at a position facing the rear side of the position where the recess 30a is formed, and a movement restricting mechanism for the molding finger 31 is disposed in the recess 32. As shown in FIGS. 4 and 5, the recess 32 has a pair of first storage portions 32a, 32a which are vertically spaced from each other by a predetermined distance and open to the recess groove side, and both storage portions 32a, 32.
a vertical through hole 32b communicating with a, and a second storage portion 32c formed on the opposite side of the groove 30a with each first storage portion 32a interposed therebetween.
Composed of and. And the first storage parts 32a, 32a
The cylindrical bodies 33 having the required diameter are housed in the
3, 33 are always urged in the direction of separation under the elastic force of the compression spring 34 housed in the vertical through hole 32b. A wedge body 35 that can contact the peripheral surface of the cylindrical body 33 is stored in the second storage portion 32c. The surface of the wedge body 35 facing the cylindrical body 33 is provided with an inclination that is closer to the concave groove 30a as it goes from the end side facing the other cylindrical body 33 toward the end side away from it. That is, the cylindrical bodies 33, 33 are the compression springs 3.
In the state in which the cylindrical bodies 33 are urged in a direction in which they are separated from each other by 4, the cylindrical bodies 33 move to the concave groove 30a side along the inclined surface 35a of the wedge body 35, and are thereby fitted into the concave grooves 30a. The cylindrical body 33 is pressed against the side surface of the forming finger 31. As a result, the lifting and lowering of the molding finger 31 with respect to the support member 30 is restricted. It should be noted that the upper cylindrical body 33 functions to restrict the rising of the molding finger 31 with respect to the support member 30, and the lower cylindrical body 33 functions to restrict the lowering of the molding finger 31 with respect to the support member 30.

The support member 30 is formed with a through hole 30b which communicates with each first accommodating portion 32a in the recess 32, and the through hole 30b is open to the rear surface side. Further, each of the through holes 30b is set to communicate with the first storage portion 32a on the side of the end portion separated from the other first storage portion 32a. That is, when the release pin 61 of the release device to be described later is inserted into the through hole 30b, the pin 61 causes the cylindrical body 33 to resist the elastic force of the compression spring 34 as shown in FIGS. It is designed to be moved to the storage side. At this time, the cylindrical body 33 moves in the direction away from the concave groove 30a along the inclined surface 35a of the wedge body 35, whereby the movement regulation of the forming finger 31 is released. The rear guide 29 is provided with through holes 29a at positions corresponding to the through holes 30b of the support member 30, and the release pin 61 is inserted into the through holes 30b through the through holes 29a. It is configured to.

In the state where the upper cylindrical body 33 is moved to the restriction release position by the release pin 61, the lower cylindrical body 33 is moved to the forming finger 31 by the elastic force of the compression spring 34 as shown in FIG. Pressed. However, when the forming finger 31 is moved up, the lower cylindrical body 33
As a result of rising with the fingers 31
3 moves in a direction away from the forming finger 31 along the inclined surface 35a of the wedge body 35 to allow the finger 31 to move. Similarly, when the lower cylindrical body 33 is moved to the restriction release position by the release pin 61, the upper cylindrical body 33 is pressed against the forming finger 31 under the elastic force of the compression spring 34 as shown in FIG. When the finger 31 is moved down, the upper cylindrical body 33 moves in the direction away from the forming finger 31 along the inclined surface 35a of the wedge body 35, and the finger 3
1 is allowed to move. In addition, the wedge body 35
It is not indispensable to provide the above, but an inclined surface may be formed in the concave portion 32, and the cylindrical body 33 may be moved along the inclined surface.

As shown in FIG. 5, the molding finger 31 is composed of an elongated plate body, and the support member 30 is provided at the upper end thereof.
Retaining device 3 for preventing the recess 30a from coming off
6 is attached via a plurality of bolts 37. A side plate 38 is disposed near the lower end of the forming finger 31 on the side surface facing the outside of the recessed groove 30a, and the outer surface in the thickness direction of the side plate 38 is set to abut the side surface of the adjacent forming finger 31. Has been done. Further, the side plate 38 is integrally formed with an engagement piece 38a extending to the rear side of the forming finger 31, and the adjustment claw 57 of the mold imparting device 23 is formed on the engagement piece 38a.
It is configured to adjust the position of the forming finger 31 in a state in which (described later) is engaged. In addition, the guide 2
As shown in FIG. 1, a reference finger 39 that is hung from the lower surface of the reference numeral 9 by a predetermined length is disposed and fixed at the center of the longitudinal direction of each of the reference numerals 9, 29.
It functions to hold the central portion in the longitudinal direction of the leaf spring 10 placed on the.

As shown in FIG. 1, hydraulic cylinders 40, 40 are arranged on the left and right sides of the moving frame 27 at positions corresponding to the positions of the guides 29, 29, and are arranged on each piston rod 40a. The pressing head 41 is set so as to come into contact with the pressing body 42 slidably arranged in the vicinity of both longitudinal end portions of the guides 29, 29. Then, by urging the two hydraulic cylinders 40, 40 in the direction in which the rods 40a, 40a are extended, the support member group disposed in the guides 29, 29 via the pressing bodies 42, 42 is directed toward the center. Is pressed, whereby the molding fingers 31 positioned on the respective support members 30 are immovably pinched and fixed,
It is configured so that its posture can be fixedly held (see FIG. 3).

Of the large number of supporting members 30 slidably arranged on the guides 29, 29, the supporting members 30 located at every other one of the supporting members 30 are arranged in the moving direction as shown in FIGS. 6 and 7. A plurality of (four in the embodiment) through holes 43 penetrating therethrough are provided. A compression spring 44 is interposed in the through hole 43 and is set so as to urge the support members 30, 30 on both sides of the support member 30 having the through hole 43 provided therebetween in a direction in which they are separated from each other. ing. That is, the hydraulic cylinder 4
When the clamping force by 0, 40 is released (the rod 40a is pulled into the barrel), the compression spring 4 is pressed as shown in FIG. 11 (a).
4, a gap is positively defined between the support members 30 and 30 adjacent to each other so that the position of the molding finger 31 arranged on the support member 30 can be easily adjusted.

[0020]

[Mold imparting device] On the rear surface side of the variable molding die 22, two mold imparting devices 23 for imparting a desired mold shape to the group of molding fingers are arranged, and each of the devices 23, 23 includes the guide 29. , 29, the forming finger group located on the left side and the forming finger group located on the right side are shared and adjusted. Since the mold imparting devices 23 and 23 have the same configuration, only the configuration of one device will be described.

Both vertical columns 21 in the body frame 21
A support stay 45 is installed between a and 21a, and a pair of guide rails 46 and 46 are vertically spaced apart from each other and extend in the longitudinal direction on the front side of the stay 45 that is oriented toward the moving frame 27, as shown in FIG. Are arranged in parallel. A support 47 is slidably arranged on the guide rails 46, 46. In addition, between both guide rails 46,46,
A first ball screw 48 is rotatably arranged in parallel with this. The first ball screw 48 is screwed into a nut (not shown) arranged on the support 47. Further, a pulley 49 arranged at a required position of the first ball screw 48,
A belt 52 is wound around the pulley 51 arranged on the output shaft of the first servomotor 50 arranged on the support stay 45. Therefore, by rotating the first ball screw 48 by driving the first servo motor 50 forward and backward, the support body 47 moves horizontally along the guide rails 46, 46. A stepped type is used for the pulleys 49 and 51 and the belt 52.

An adjusting member 53 is arranged on the support 47 so as to be movable up and down, and a nut 54 arranged on the adjusting member 53.
And a second ball screw 55 vertically disposed on the support 47.
Is screwed in. A second servo motor 56 is placed upside down on the support 47, and a second ball screw 55 is connected to the motor 56. Therefore, the second servomotor 5
By rotating the ball screw 55 by driving 6 forward and backward, the adjusting member 53 moves up and down vertically (see FIG. 10).
An adjusting claw 57 extending toward the moving frame 27 is arranged at the lower end of the adjusting member 53, and the adjusting claw 57 engages with an engaging piece 38a of the side plate 38 arranged on the molding finger 31. It is possible. That is, the support 47 is moved in the horizontal direction by the first servomotor 50, and the support 47 is exposed to the rear surface side of the forming finger 31 to be adjusted. Then, the adjusting member 5 is moved by the second servo motor 56.
By moving 3 in the vertical direction, the position of the forming finger 31 can be adjusted via the engaging piece 38a that engages with the adjusting claw 57. Then, by adjusting each forming finger 31, as shown in FIG. 12, a required continuous camber shape is formed as a whole at the open end of the forming finger group.

The first servomotor 50 and the second servomotor 56 have position detectors 58 and 59 for detecting the current positions of the support 47 and the adjusting claw 57 by detecting the number of rotations of the motors 50 and 56. Is provided so that the precise positions of the support 47 and the adjusting pawl 57 are constantly monitored. Signals from the position detectors 58 and 59 relating to the current positions of the support 47 and the adjusting claw 57 are input to control means (not shown) including, for example, a microcomputer (hereinafter referred to as "microcomputer"). Therefore, by inputting the data of the desired camber die shape to the control means in advance, the servo motors 50, 56 can be generated based on the data.
The drive control is performed so that a desired die shape can be easily given to the forming finger group.

As shown in FIG. 2, on the rear surface side of the support 47, an air cylinder 60 as a release device for the movement restricting mechanism is provided at a position corresponding to the through holes 29a, 29a formed in the guide 29. The release pins 61, which are respectively disposed on the rods of the cylinder 60, are connected to the corresponding through holes 29.
It is aimed at a. Then, by biasing the air cylinder 60 in the direction in which the rod extends, the release pin 61 is inserted into the through hole 29a of the guide 29 and the through hole 30b of the supporting member 30 as shown in FIGS. Is inserted. As a result, as described above, the forming finger 31
The cylindrical body 33 in the movement restricting mechanism of
1 can be moved to the restriction release position that allows the movement.

[0025]

[Regarding the Variable Type Member] As shown in FIG. 1, a reference mounting table 63 that is moved up and down by a hydraulic cylinder 62 is arranged in the center of the bottom of the main body frame 21, and the reference mounting table 63 is provided on both left and right sides of the mounting table 63. One end of each of the deformable members 25, 25 formed by a chain having a width dimension is rotatably supported. The other end of each variable member 25 has a corresponding vertical column 21.
It is pivotally supported on one end of a lever-shaped lever 64 which is pivotally supported on a. Further, a piston rod 65a of an air cylinder 65 arranged on the vertical column 21a is connected to the other end of the lever 64. This air cylinder 65
Is set so as to always urge the rod 65a to extend, that is, to pull the variable mold member 25 from the reference mounting base 63 via the lever 64, and always applies a required tension to the variable mold member 25. In this state, the leaf spring 10 is formed.

As shown in FIG. 2, a holding member 66 is rotatably supported on the front side of the reference mounting table 63, and the holding member 66 is rotated by a link mechanism 67 and an air cylinder 68. Has been done. A fixed protrusion 63a is provided on the rear side of the upper surface of the reference mounting table 63, and the plate spring 10 mounted on the mounting table 63 is composed of the fixed protrusion 63a and the sandwiching member 66 in the plate width direction. It is sandwiched and positioned. The reference finger 39 is positioned right above the mounting portion of the plate spring 10 on the reference mounting table 63.

At the bottom of the main body frame 21, the variable mold members 25 are placed at the optimum positions on both left and right sides of the position where the reference mounting table 63 is disposed, depending on the length of the leaf spring 10 and the camber shape. The holding devices 69 that are held by are arranged movably in the extending direction of the variable mold member 25. Since the holding device 69 and the moving mechanism thereof are the same on the left and right, only the configuration of the one device 69 and the mechanism will be described.

That is, the protrusion 70 provided at the central position of the lower loading board 82 arranged at the bottom of the main body frame 21.
As shown in FIG. 1, a ball screw 71 is rotatably arranged in parallel with the moving frame 27 between the and the supporting body 83 provided at the end of the loading board 82. Is a servo motor 72 arranged on the support 83.
It is connected to the. Further, a guide rail 73 is arranged between the protrusion 70 and the support body 83 in parallel with the ball screw 71, and a main body 69a of the holding device 69 is movably mounted on the rail 73, and the main body 69a. The ball screw 71 is screwed into the nut 74 arranged in the. Therefore, by rotating the ball screw 71 by driving the servomotor 72 in the forward and reverse directions, the holding device 69 is moved to the guide rail 73.
Along with the reference mounting table 63, the supporting position of the deformable member 25 can be changed according to the length of the leaf spring 10 (see FIGS. 12 and 14).

The holding device 69 is provided with a support base 76 which can be adjusted up and down by an elevating mechanism 75 arranged inside the main body 69a, and a support roller 77 is provided at a position where the support base 76 is separated from the reference mounting base 63. While being rotatably supported, the reference mounting table 63 can be moved from the position where the supporting roller 77 is disposed.
A lever body 78 is rotatably supported at a position spaced apart to the side. A support roller 79 is rotatably fitted around the pivot shaft of the lever body 78, and the deformable member 25 is wound around the upper side of the support roller 79 and the lower side of the support roller 77. Being pivotally supported.
Further, an auxiliary roller 80 is rotatably supported by an end portion of the lever body 78 that is directed toward the reference mounting table 63, and the roller 80 is configured to abut the lower surface of the deformable member 25.
Furthermore, at the other end of the lever body 78, the small-diameter roller 8 is attached.
1, the roller 81 is rotatably supported, and the roller 81 functions to support the "eyeball" formed at the end of the leaf spring 10 from below when forming the camber of the leaf spring 10 described later.
(See Figure 13).

The current position of the holding device 69 is constantly monitored by an appropriate detection means (not shown), and a signal relating to the current position is input to the control means. Therefore, by inputting the data of the length of the leaf spring 10 and the shape of the camber to the control means in advance, the servo motor 72 and the lifting mechanism 7 are based on the data.
5, the holding device 69 is automatically moved to the optimum position for holding the deformable member 25.

[0031]

Next, the operation of the camber molding machine thus constructed will be described. Prior to actual operation of the molding machine 20, data such as preset length dimensions of the leaf springs 10 and camber mold shape are input to the control means (not shown) provided in the molding machine 20. . Further, the holding devices 69, 69 holding the deformable members 25, 25 are positioned at positions corresponding to the length dimension of the leaf spring 10.

As shown in FIG. 11 (a), the two hydraulic cylinders 40, 40 arranged at both ends of the guides 29, 29 are urged in the direction of pulling the rods 40a, 40a into the barrel, The clamping force on the support member group slidably arranged on the guides 29, 29 is released. As a result, the adjacent support members 3 are subjected to the elastic force of the plurality of compression springs 44 arranged on every other support member 30 in the support member group.
0 and 30 are separated from each other.

Then, based on the input data, the servomotors 50 and 56 for driving the respective mold imparting devices 23 disposed on both sides of the machine central portion are driven and controlled, and are supported by the respective supporting members 30. The position of the forming finger 31 is adjusted.

That is, the support 47 is moved horizontally by urging the first servomotor 50 to position the support 47 at the rear position of the forming finger 31 to be adjusted. Further, the adjusting claw 57 of the adjusting member 53 is shown in FIG.
As shown in FIG. 3, the side plate 38 disposed on the forming finger 31 is exposed below the engaging piece 38a. Then, one of the upper and lower air cylinders 60 arranged on the support body 47 is biased to insert the release pin 61 into the through hole 29a of the guide 29 and the through hole 30b of the support member 30. Thereby, the support member 3
Forming finger 3 by the movement restricting mechanism arranged at 0.
The movement restriction of No. 1 is released, and the finger 31 has the groove 30a.
The inside can be moved up and down. The releasing air cylinder 60 to be used is selected depending on whether the adjusting direction of the molding finger 31 with respect to the current position is raised or lowered.

That is, when raising the forming finger 31 from the current position, as shown in FIGS. 8 and 10 (b), the air cylinder 60 for releasing the upper side is urged and the release pin 61 thereof is passed through the upper side. Insert into the holes 29a, 30b. The cylindrical body 33 accommodated in the first accommodating portion 32a of the support member 30 is pressed downward by the release pin 61, and the concave groove 3 is formed along the inclined surface 35a of the wedge body 35.
Separated from 0a. Therefore, the forming finger 31 can be raised in the concave groove 30a. At this time, the cylindrical body 3 stored in the lower first storage portion 32a
3 does not regulate the rise of the forming finger 31.

Further, when lowering the forming finger 31 from the present position, as shown in FIGS. 9 and 10 (c), the lower releasing air cylinder 60 is urged to release the release pin 61. Insert into 29a, 30b. Support member 3
The cylindrical body 33 accommodated in the first accommodating portion 32a of 0 is
It is pressed upward by the release pin 61 and is separated from the concave groove 30a along the inclined surface 35a of the wedge body 35. Therefore, the forming finger 61 can be lowered in the concave groove 30a. Even at this time, the cylindrical body 33 housed in the upper first housing portion does not restrict the lowering of the forming finger 31.

As described above, while the molded finger 31 is held in a movable state with respect to the support member 30, the second servomotor 56 is urged to engage with the engaging piece 38a. Raise and lower 57. As a result, the forming finger 31 slides in the concave groove 30a of the support member 30 and is moved to a predetermined position (see FIG. 11 (b)). When the adjustment is completed, the release pin 61 inserted into the through holes 30b and 29a is removed to remove the corresponding cylindrical body 33.
Is pressed against the side surface of the forming finger 31 facing the groove 30a by the action of the compression spring 34 and the wedge body 35. As a result, the forming finger 31 is positioned with respect to the support member 30 in a state in which its movement is restricted.

As described above, the required number of forming fingers 3 are formed.
By adjusting 1, the curve connecting the lower open ends of the forming fingers has the desired shape as a whole as shown in FIG. In this state, the two hydraulic cylinders 4
As shown in FIG. 11 (c), the guides 2 and 0 are urged in the direction in which the rods 40a and 40a are extended.
The support member groups arranged at 9, 29 are close to each other and firmly hold the forming finger 31 immovably. In addition,
The forming fingers 31 corresponding to the “eyeballs” formed at the ends of the leaf spring 10 are retracted in advance to a position where they do not interfere with the leaf spring 10.

Next, the straight leaf spring 10 heated to the required temperature is placed on the reference placing table 63 at the center in the longitudinal direction, and the holding member 66 is placed in the leaf width direction of the leaf spring 10.
And the fixed protrusion 63a. At this time, the leaf spring 10
A mold shape corresponding to a desired camber is formed by a variable mold group above.

Two main hydraulic cylinders 26, 26 arranged on the main body frame 21 are energized, and as shown in FIG.
By lowering the moving frame 27 along the vertical columns 21a, 21a, the group of forming fingers provided on the frame 27 and provided with the required die shape are set to the leaf spring 1
It is pressed against the upper surface of 0. Further, the reference mounting table 27 is lowered in synchronization with the lowering of the moving frame 27. The variable mold members 25, 25 arranged on both sides of the mounting table 27 are applied with a required tension by the air cylinders 65, 65, so that the variable mold members 25, 25 are made of the leaf spring 10. While being in contact with the lower surface of the mold, it deforms so as to follow the mold shape formed in the forming finger group. Therefore, the leaf spring 10 is sandwiched between the forming finger group and the variable mold members 25, 25 as the moving frame 27 descends, and thereby a camber having the same shape as the forming finger group is formed. The leaf spring 10 in which the camber is formed is the moving frame 2
After returning 7 to the standby state, it is taken out from the molding machine 20 and sent to a post-process such as quenching. The part of the deformable member 25 that faces the end of the leaf spring 10 in the longitudinal direction is held by the roller group of the holding device 69, and the “eyeball” is stably held by the small-diameter roller 81.

Next, when the camber shape, the length dimension of the leaf spring 10 and the like are changed due to the order change, new mold shape data is input to the control means (not shown). As a result, the servomotors 50, 56 are controlled again, and the mold imparting devices 23, 23 form a desired shape on the forming finger group, so that the forming finger group continuously forms a desired shape. Are formed (see FIG. 14). Further, the holding devices 69, 69 are also the leaf springs 10.
The movement is adjusted according to the length dimension. That is, a desired die shape can be formed on the forming finger group simply by inputting the desired camber die shape data to the control means, and the time required for order change can be shortened to improve the manufacturing efficiency. You can Moreover, it is not necessary to prepare a large number of upper molds and lower molds corresponding to the shape of the camber, which is advantageous in that the manufacturing cost can be reduced and complicated inventory management can be omitted. Further, when molding the leaf springs 10 of a required lot, if it is found by inspection of the leaf springs 10 after molding that a proper mold shape is not imparted, the mold imparting devices 23, 23 are operated. By doing so, the mold shape of the variable mold group can be corrected in an extremely short time, and the production efficiency can be improved.

Furthermore, since it is possible to easily form the required die shape, when forming a single piece or a very small number of leaf springs 10 such as a prototype, the upper die and the lower die corresponding thereto are formed. Since it is not necessary to manufacture a mold, running costs can be reduced. Also, the mold shapes of a plurality of cambers are input in advance to the control means,
If the desired mold shape can be selected by simply pressing the required setting button when changing the order, the time required for adjustment can be further shortened. Furthermore, the support member 3
Since the structure of the positioning means (movement restriction mechanism) of the forming finger 31 with respect to 0 is simple, the hydraulic cylinder 40,
By 40, the forming finger group can be firmly fixed so as to be immovable, and at the time of camber forming by the variable forming die 22, it is possible to prevent the mechanism from being damaged by being applied with a load.

[0043]

[Another embodiment] FIGS. 15 and 16 show another embodiment of the camber molding machine in which the deformable device according to the present invention is adopted. In this embodiment, the main body frame 2 is used.
1 has a pair of variable type devices 24, 24 arranged in a vertical relationship. That is, the plurality of forming fingers 31
Variable molding dies 22, 22 provided with are arranged to face each other in a vertical relationship, and the lower open end of the group of molding fingers in the upper variable molding die 22 and the upper part of the group of molding fingers in the lower variable molding die 22. The open ends are configured so that the required camber shapes are imparted to the open ends by the corresponding die imparting devices 23, 23. Then, after mounting the leaf spring 10 on the lower variable molding die 22, the upper variable molding die 2 is placed.
By forcing 2 toward the variable mold 22 on the lower side, a required camber is given to the leaf spring 10.

In the embodiment, the case where the positions of a large number of forming fingers in the variable forming die are adjusted by the two mold giving devices has been described, but the present invention is not limited to this, and one mold giving device is used. The position of all the forming fingers may be adjusted by the device, or three or more mold applying devices may be provided. Further, in the embodiment, as the mechanism for restricting the movement of the forming finger with respect to the support member, the structure for restricting both the upward movement and the downward movement has been described, but a structure for restricting only the downward movement of the finger may be used.

[0045]

As described above, according to the variable mold device for the camber molding machine for leaf springs according to the present invention, the molding finger in which the mold for molding the camber on the leaf spring is movably arranged on a large number of supporting members. It is possible to easily form a desired mold shape at the open end of the variable molding by configuring the variable molding die including the above and adjusting the position of each molding finger by the mold applying device. Therefore, the setup change time required for order change and the time required for mold shape correction and adjustment can be shortened, and the production efficiency can be significantly improved. Moreover, since the adjusting means is not provided for each forming finger, there is an advantage that the entire structure is simplified and the manufacturing cost can be reduced. Further, since the forming finger positioning mechanism with respect to the support member has a simple structure and the forming finger group can be fixed firmly and immovably, it is possible to effectively prevent the mechanism from being damaged by being loaded.

Furthermore, since the variable molding die can be automatically positioned based on the numerical values inputted in advance, the die shape can be changed in a short time according to the order change. Moreover, since the operator does not directly intervene in the adjustment work, labor can be reduced and labor can be saved.

[Brief description of drawings]

FIG. 1 is a front view showing a schematic configuration of a camber forming machine for leaf springs according to an embodiment.

FIG. 2 is a vertical sectional side view of a camber molding machine.

FIG. 3 is a front view of a main part of the camber molding machine, partially broken away.

FIG. 4 is a schematic perspective view of a main part showing a variable molding die.

FIG. 5 is a vertical sectional side view of a main part showing a variable molding die.

FIG. 6 is a cross-sectional plan view of essential parts showing a state in which the support members in the variable mold are crossed at different positions.

FIG. 7 is a front view of a main part of the variable molding die, showing a supporting member partially broken away.

FIG. 8 is an explanatory view showing a state in which the movement of the forming finger is restricted in the movement of the forming finger arranged on the support member.

FIG. 9 is an explanatory view showing a state in which the movement of the forming finger arranged on the support member allows the finger to descend.

FIG. 10 is an explanatory diagram showing a state in which the position of the forming fingers is adjusted by the mold applying device.

FIG. 11 is an explanatory view showing a state in which the forming finger group whose position has been adjusted by the mold applying device is fixed so as to be immovable.

FIG. 12 is an explanatory view showing a state in which a straight leaf spring is faced between a variable mold and a variable member.

FIG. 13 is an explanatory diagram showing a state in which a required camber is applied to a leaf spring by forcibly bringing a variable molding die toward a variable mold member.

14 is an explanatory diagram showing a state in which a required camber is applied to a leaf spring having a length dimension different from that of the leaf spring shown in FIG.

FIG. 15 is a main part front view showing a schematic configuration of a camber molding machine according to another embodiment.

FIG. 16 is a vertical sectional side view of a main part of a camber molding machine according to another embodiment.

FIG. 17 is an explanatory diagram showing a suspension device using a leaf spring.

FIG. 18 is an explanatory view showing a molding machine according to a conventional technique.

[Explanation of symbols]

 10 leaf spring 20 camber molding machine 21 main body frame 23 mold imparting device 27 moving frame 29 guide 30 support member 30a concave groove 31 molding finger 33 cylindrical body 38a engaging piece 40 hydraulic cylinder 50 first servo motor 56 second servo motor 57 adjustment nail

Claims (2)

[Claims] 1. A body frame (2) of a camber molding machine (20)
1) is provided with a movable frame (27) arranged to be able to move up and down, and a large number of forming fingers (31) arranged to be movable up and down relative to the moving frame (27). In the camber molding machine configured to form a desired mold shape to be applied to the leaf spring (10), a guide disposed in the moving frame (27) and extending in the longitudinal direction of the leaf spring (10). (29, 29), a large number of support members (30) movably arranged along the longitudinal direction of the guides (29, 29), and one support member adjacent to the support member (30) (30)
A concave groove (30a) formed on a side surface facing the concave groove (30a) into which the molding finger (31) is vertically movable, and arranged in the support member (30) and always faces the concave groove (30a). The finger (31) is contacted with the forming finger (31) to restrict the lowering of the finger (31), and the releasing means (61) is used to form the forming finger (31).
And a regulating member (33) that is moved to a position that allows the lowering of the
A mold applying device (23) that adjusts (31) up and down with respect to the support member (30) to apply a desired mold shape to the open end of the forming finger group.
And a plurality of support members arranged on the moving frame (27).
A leaf spring characterized by comprising releasable fixing means (40, 40) for immovably positioning and fixing a group of forming fingers having a required die shape by pressing (30) against each other. Variable type device in the camber molding machine. 2. The mold applying device (23) includes an adjusting claw (57) engageable with an engaging piece (38a) provided on the forming finger (31), and the adjusting claw (57) is 2. A variable type device in a camber molding machine for a leaf spring according to claim 1, wherein movement of the leaf spring (10) is controlled in a longitudinal direction and a vertical direction by servo means (50, 56).