JP4909042B2 - Clutch drum forming device for double clutch - Google Patents

Description

The present invention holds a workpiece by a drive side mold member and a driven side mold member connected to a main shaft, and rotates the workpiece under the rotating action of the main shaft, while pressing a forming roll member against the workpiece to double The present invention relates to a clutch drum forming apparatus for a double clutch that forms a drum portion of a clutch drum for a clutch .

  For example, a clutch drum is used for a clutch constituting an automatic transmission for a vehicle. The clutch drum is provided with a large number of primes at an equal pitch on the inner periphery of the peripheral wall portion, and is usually formed using a roll forming apparatus. As this type of roll forming apparatus, for example, a roll forming apparatus disclosed in Patent Document 1 is known.

  In this roll forming apparatus, one of two horizontal directions orthogonal to each other is set as an X-axis direction and the other is set as a Y-axis direction, and a headstock and a tailstock that are opposed to each other in the X-axis direction are arranged on the bed. A pair of roll support bases facing each other is arranged, the tailstock is moved in the X-axis direction toward the headstock, the work is sandwiched between the headstock and the tailstock, and both roll support bases are In a roll forming apparatus that moves inward in the axial direction and moves in the X-axis direction and forms a workpiece by a roll that is supported by both roll support bases, both roll support bases are placed in the Y-axis direction on the bed. A movable base that is movably mounted in the Y-axis direction is provided so as to be movable in the X-axis direction, and the movable base is formed in a box shape having at least a bottom wall, a ceiling wall, and end walls at both ends in the Y-axis direction, Move each roll support base to each end wall in the Y-axis direction. And a drive source for moving the tailstock in the X-axis direction is attached to a fixed base on the bed, and the upper part of the fixed base and the upper part of the headstock are coupled via a tie rod. Yes.

  As a result, it is possible to effectively prevent warping and twisting of the movable table, and to effectively prevent warping of the bed due to pressing reaction force with a tie rod, and it becomes possible to improve work processing accuracy. Yes.

JP 2000-42643 A (FIG. 1)

The present invention has been made with respect to this type of roll forming apparatus, and in particular, while miniaturizing the entire apparatus and effectively preventing the mold opening from being caused by an external force at the time of forming, highly accurate roll forming An object of the present invention is to provide a clutch drum forming apparatus for a double clutch capable of efficiently performing processing.

The present invention holds a workpiece by a drive side mold member and a driven side mold member connected to a main shaft, and rotates the workpiece under the rotating action of the main shaft, while pressing a forming roll member against the workpiece to double The present invention relates to a clutch drum forming apparatus for a double clutch for forming a drum portion of a clutch drum for a clutch .

The clutch clutch molding device for double clutch is disposed at least in the drive side mold member or in the driven side mold member, and prevents the drive side mold member and the driven side mold member from opening during roll forming. A clamping mechanism , wherein the clamping mechanism is arranged inside the driving side mold member or the driven side mold member, and inside the driven side mold member or inside the driving side mold member. And a rotation drive source for rotating the bolt member or the nut member and screwing the bolt member into the nut member .

  Furthermore, it is preferable that the driving-side mold member and the driven-side mold member are provided with a first mandrel and a second mandrel in which a tooth profile groove is formed on the outer periphery.

  According to the present invention, the driving side mold member and the driven side mold member can be clamped firmly and reliably by the clamp mechanism. Therefore, when the roll forming process is performed on the workpiece, even if an external force greater than the clamping force is applied, the drive side mold member and the driven side mold member can be reliably prevented from opening, Work roll forming process can be performed with high accuracy.

  Moreover, the clamp mechanism is disposed at least inside the drive side mold member or inside the driven side mold member. For this reason, the entire apparatus can be effectively reduced in size and the cost can be easily reduced.

FIG. 1 is a schematic configuration explanatory view of a roll forming apparatus 10 which is a clutch drum forming apparatus for a double clutch according to an embodiment of the present invention.

  The roll forming apparatus 10 includes a base 12 on which a headstock 14 and a tailstock 16 are disposed so as to face each other in the direction of the arrow X. The head stock 14 includes a first spindle 18, and the first spindle 18 is connected to a rotational drive source, for example, a motor 22 via a belt and pulley means 20. The tailstock 16 includes a second spindle 24. A rod 28 extending from the hydraulic cylinder 26 is connected to the second spindle 24, and the tailstock 16 is configured to be able to advance and retreat in the arrow X direction.

  The first spindle 18 is mounted with a first mandrel 30 that is a driving-side mold member, while the second spindle 24 is mounted with a second mandrel 32 that is a driven-side mold member. A tooth profile groove 30 a is formed on the outer periphery of the first mandrel 30, and a tooth profile groove 32 a is formed on the outer periphery of the second mandrel 32.

  A clamp mechanism 34 is disposed inside the first mandrel 30 and the second mandrel 32 to prevent the first mandrel 30 and the second mandrel 32 from opening during roll forming, which will be described later. .

  As shown in FIGS. 2 and 3, the clamp mechanism 34 includes a bolt member 36 disposed inside the first mandrel 30, a nut member 38 disposed inside the second mandrel 32, and the second mandrel 32. And a motor 40 on which a rotary shaft 40a is mounted on the nut member 38.

  The bolt member 36 passes through a hole 42 formed in the central portion of the first mandrel 30 and protrudes a predetermined length to the outside, and a screw portion 36a is formed at least on the tip end side. The nut member 38 is disposed in the second mandrel 32 and has a screw hole 38a into which the screw portion 36a is screwed. The second mandrel 32 is formed with a hole 44 through which the bolt member 36 is inserted.

  As shown in FIG. 1, a movable base 46 is provided on the base 12 between the spindle stock 14 and the tailstock 16 and long in the arrow Y direction. The movable base 46 is configured to be movable back and forth in the direction of the arrow X along a plurality of X-axis rails 48 via a moving mechanism (not shown). A pair of roll support bases 50a and 50b are arranged on the movable base 46 so as to face each other in the arrow Y direction.

  For example, rolls 52a and 52b for forming a clutch drum for a double clutch (described later) are rotatably supported on the roll support bases 50a and 50b. Motors 54a and 54b are attached to both ends of the movable base 46 in the arrow Y direction, and the roll support bases 50a and 50b can be advanced and retracted in the arrow Y direction by feed screws 56a and 56b connected to the motors 54a and 54b. .

  The operation of the roll forming apparatus 10 configured as described above will be described below.

  First, as shown in FIG. 3, the workpiece W is packaged at the tip of the bolt member 36 mounted in the first mandrel 30. Although this work W is not shown, for example, a cylindrical billet is preformed by hot forging, and the ring portion is inserted into the outer periphery of the shaft portion Wa into which the bolt member 36 is inserted via a disc portion Wb. Wc is integrally formed.

  Next, as shown in FIG. 1, the hydraulic cylinder 26 is driven, and the tailstock 16 moves toward the headstock 14 via the rod 28. For this reason, one end side of the shaft portion Wa of the workpiece W is inserted into the hole 44 of the second mandrel 32 attached to the second spindle 24 of the tailstock 16. On the other hand, the other end side of the shaft portion Wa of the workpiece W is inserted into the hole portion 42 of the first mandrel 30 attached to the first spindle 18 (see FIG. 4).

  At that time, in the clamp mechanism 34, the screw portion 36 a of the bolt member 36 fixed to the first mandrel 30 enters the screw hole 38 a of the nut member 38 attached to the inside of the second mandrel 32. Therefore, under the driving action of the motor 40, the nut member 38 rotates through the rotating shaft 40a, whereby the screw portion 36a starts to be screwed into the screw hole 38a.

  As shown in FIG. 5, the first mandrel 30 and the second mandrel 32 are clamped via the hydraulic cylinder 26 to clamp the workpiece W, and the bolt member 36 and the nut member that constitute the clamp mechanism 34. The first mandrel 30 and the second mandrel 32 are clamped under the screwing action with 38.

  In this state, as shown in FIG. 1, the roll support bases 50a and 50b on the movable base 46 are close to each other in the arrow Y direction via the feed screws 56a and 56b under the rotational action of the motors 54a and 54b. Move to. For this reason, the rolls 52a and 52b abut on the outer peripheral surface of the ring portion Wc corresponding to the intermediate portion of the ring portion Wc, that is, the joining position of the first mandrel 30 and the second mandrel 32. On the other hand, the first spindle 18 rotates through the belt / pulley means 20 under the driving action of the motor 22. Accordingly, the workpiece W sandwiched between the first mandrel 30 and the second mandrel 32 is rotated.

  Therefore, the movable base 46 first moves in the direction of the arrow X1. For this reason, as shown in FIG. 6, the rolls 52a and 52b move along the outer peripheral surface of the first mandrel 30 so that approximately half of the ring portion Wc of the workpiece W moves in the direction of the arrow X1, and the roll 52a , 52b and the groove 30a of the first mandrel 30 is formed with a first drum portion 60a having serrations.

  Next, the movable table 46 moves in the direction of the arrow X2. Accordingly, the rolls 52a and 52b move in the direction of the arrow X2 while pressing the remaining half of the ring portion Wc of the workpiece W against the outer peripheral surface of the second mandrel 32. For this reason, ironing is performed by the rolls 52a and 52b and the groove portion 32a of the second mandrel 32, and the second drum portion 60b having serration is formed. Thereby, the clutch drum 60 for double clutch which integrally has the 1st drum part 60a and the 2nd drum part 60b is shape | molded.

  After the molding of the clutch drum 60 is completed, the motor 40 constituting the clamp mechanism 34 is driven in the reverse direction. Accordingly, the nut member 38 is rotationally driven in the direction of relaxation from the bolt member 36, and the clamp of the first mandrel 30 and the second mandrel 32 by the clamp mechanism 34 is released. On the other hand, the hydraulic cylinder 26 is driven, and the tailstock 16 moves in a direction away from the head stock 14.

  Accordingly, as shown in FIG. 7, the second mandrel 32 is separated from the first mandrel 30, and the clutch drum 60 is held by the bolt member 36. Then, the clutch drum 60 is removed from the first mandrel 30.

  In this case, in this embodiment, the tailstock 16 moves toward the headstock 14 via the hydraulic cylinder 26, whereby the first mandrel 30 and the second mandrel 32 are clamped with the workpiece W interposed therebetween. ing. In this state, the first mandrel 30 and the second mandrel 32 can be firmly and reliably clamped by the clamp mechanism 34.

  For this reason, when the roll forming process is performed on the workpiece W via the rolls 52a and 52b, the first mandrel 30 and the second mandrel 32 are not molded even if an external force greater than the clamping force by the hydraulic cylinder 26 is applied. It can be surely prevented from opening. Thereby, the roll forming process with respect to the workpiece W is satisfactorily performed, and an effect that the highly accurate clutch drum 60 can be efficiently formed is obtained.

  Moreover, in the clamp mechanism 34, the bolt member 36 is disposed inside the first mandrel 30, while the motor 40 and the nut member 38 are disposed inside the second mandrel 32. Therefore, the clamp mechanism 34 is not disposed outside, and the entire roll forming apparatus 10 can be effectively downsized, and the manufacturing cost of the roll forming apparatus 10 can be easily reduced.

  In the present embodiment, the bolt member 36 is disposed inside the first mandrel 30, while the motor 40 and the nut member 38 are disposed inside the second mandrel 32. At least one of them is What is necessary is just to be arrange | positioned inside the 1st mandrel 30 or the said 2nd mandrel 32. FIG. Alternatively, the motor 40 may be connected to the bolt member 36 and the bolt member 36 may be rotated so that the screw portion 36a is screwed into the fixed nut member 38.

It is a schematic structure explanatory view of a roll forming device concerning an embodiment of the present invention. It is a schematic perspective view which shows the internal state of the clamp mechanism which comprises the said roll forming apparatus. It is a section explanatory view of the above-mentioned clamp mechanism. It is operation | movement start explanatory drawing of the said clamp mechanism. It is operation | movement completion explanatory drawing of the said clamp mechanism. It is explanatory drawing of a roll forming process. It is explanatory drawing at the time of taking out a workpiece | work after completion | finish of the said roll forming process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Roll forming apparatus 12 ... Base 14 ... Spindle base 16 ... Tailstock 18, 24 ... Spindle 22 ... Motor 26 ... Hydraulic cylinder 30, 32 ... Mandrel 34 ... Clamp mechanism 36 ... Bolt member 38 ... Nut member 40 ... Motor 46 ... Movable stand 50a, 50b ... Roll support stand 52a, 52b ... Roll

Claims (2)

A clutch drum for a double clutch by holding a workpiece with a drive-side mold member and a driven-side mold member connected to a main shaft and rotating the workpiece under the rotating action of the main shaft while pressing a molding roll member against the workpiece. A clutch drum forming device for a double clutch for forming a drum portion of
A clamp mechanism that is disposed at least in the drive-side mold member or the driven-side mold member, and prevents the drive-side mold member and the driven-side mold member from opening during roll molding ;
The clamp mechanism includes a bolt member disposed inside the driving side mold member or the driven side mold member;
A nut member disposed inside the driven-side mold member or the drive-side mold member;
A rotational drive source for rotating the bolt member or the nut member and screwing the bolt member into the nut member;
Clutch drum molding device for double clutch, characterized in Rukoto equipped with. In the clutch drum molding device for double clutch according to claim 1 Symbol mounting, the drive-side mold member and the driven-side mold member, characterized by providing a first mandrel and a second mandrel teeth grooves on the outer peripheral portion is formed A clutch drum forming device for a double clutch .

Images