JPH0360827A - Manufacture of sheet metal part such as primary cylinder and the like - Google Patents

Abstract

PURPOSE:To reduce the cost of a product by performing plastic deformation of a primary cylinder, etc., with die assemblies and a rolling roller. CONSTITUTION:A bent part 60 protruding to one side and a thick wall part 61 are formed by the die assemblies 2, 3, 4, 70 on the peripheral edge part of a circular steel sheet A, the central part is drawn to form a collar cup body 64, further, the hardness is elevated by pressing rollers 7, 8. A groove 65 to engage with a seal ring is formed by a rolling roll 9 on the outer peripheral surface of a thick wall part 61. In the way, it is possible to manufacture the primary cylinder having enough strength and hardness by sheet stock and to reduce the cost.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing a primary cylinder or the like used, for example, in an automatic transmission of an automobile.

[Prior Art] Conventionally, this type of primary cylinder and the like have generally been manufactured by die casting.

[Problems to be Solved by the Invention] According to die casting, the cylinder has to be thick in order to obtain a predetermined strength, and the equipment has become complicated, resulting in an increase in cost.

The present invention was made in view of the above circumstances, and one purpose is to provide a method for manufacturing a primary cylinder that uses simple manufacturing equipment, can obtain sufficient strength with a thin wall, and as a result can reduce costs. shall be.

[Means for Solving the Problems] In order to achieve the above-mentioned object, a first invention according to the present invention is to form a bent part that protrudes annularly on one side by a mold device on the peripheral edge of a circular steel plate. a step of applying pressure from both sides of the steel plate to form a thick portion while the bent portion is restrained in the diametrical direction of the steel plate by a molding device; A process of forming the circular steel plate into a cup-shaped body with a brim, and a step of forming the cup-shaped body with a brim on the surfaces of the cup portion and the brim portion of the cup-shaped body with a brim while rotating the cup-shaped body with a brim about its center line. a step of pressing a pressure roller to improve the hardness of the cup-shaped body with a flange, and rotating the cup-shaped body with a flange about its center line, and restraining the thick portion in the thickness direction and toward the center of the steel plate. The method further includes a step of pressing a rolling roller against the outer peripheral surface of the thick-walled portion to form a seal ring fitting groove in the thick-walled portion.

In addition, in order to achieve the above object, a second invention according to the present invention includes a step of forming a bent portion projecting annularly on one side on the peripheral edge of a circular steel plate using a mold device; A process of forming an opening into a thick part by applying pressure from both sides of the steel plate while the steel plate is restrained in the diametrical direction by a mold device, and a process of forming the opening into a thick part by rotating the circular steel plate about its center line. a step of pressing a pressure roller against the surface to improve the hardness of the circular steel plate; and rotating the circular steel plate about its center line and restraining the thick portion in the thickness direction and toward the center of the steel plate. The method includes a step of pressing a rolling roller against the outer circumferential surface of the thick portion to form a seal ring fitting groove.

[Function] According to the first invention, a so-called cup-shaped primary cylinder is manufactured. At this time, the pressed cup-shaped body with a flange is rotated and a pressure roller is pressed against its surface, causing work hardening of the cup-shaped body with a flange, thereby improving the hardness of the primary cylinder. do. In other words, sufficient strength can be obtained even if the thickness of the material is thin.

Further, the work hardening is applied after the circular steel plate as the raw material is squeezed into a cup-shaped body with a flange, so that the squeezing process is easily performed without causing cracks or the like in the raw material. As a result, the durability of the manufacturing equipment is reduced, resulting in a simple structure, and the cost of the primary cylinder is reduced.

Furthermore, since the seal ring fitting groove is formed by rolling after forming the thick portion, workability and groove strength are improved.

Further, according to the second invention, five so-called disk-shaped primary cylinders are manufactured. At this time, a pressure roller is pressed against the surface of the rotating circular steel plate as the raw material, causing work hardening of the circular steel plate, thereby improving the hardness of the primary cylinder. In other words, sufficient strength can be ensured even if the thickness of the material is thin. Since the seal ring fitting groove is formed by rolling after forming the thick portion, workability and groove strength are improved.

[Example] Embodiments of the present invention will be described below based on the drawings.

FIGS. 1(I) to (■) relate to claim 1 of the present invention. This is a first embodiment showing the manufacturing process of a so-called cup-shaped primary cylinder. Note that since each process is bilaterally symmetrical, only the right half thereof is illustrated.

FIG. 1(I) shows a state in which a circular steel plate A having a predetermined diameter as a raw material is obtained by press working, and the first to sixth mold apparatuses used sequentially to form the circular steel plate A are shown in FIG. 1, 2, 3, 4.5 and 6, and pressure roller 7.
8. The rolling roller 9 is constructed as follows.

That is, the first mold device l shown in FIG.
0 and a lower mold 11, an annular protrusion 13 centered on the mold center line 12 is provided on the lower surface near the outer periphery of the upper mold 10, and an annular recess corresponding to the annular protrusion 13 is provided on the upper surface of the lower mold 11. 1
4 is provided.

The fit, two mold device 2 shown in FIG. 1(m) consists of an upper mold 15 and a lower mold 16, and an annular recess 18 centered on the mold center line 17 is provided on the lower surface near the outer periphery of the upper mold 15. The upper surface of the annular recess 18 is a flat surface parallel to the upper surface of the lower side 16, that is, the steel plate support surface 19.

Further, the third mold device 3 shown in FIG. 1 (IV) is used for squeezing processing and consists of upper molds 20A, 20B and a lower mold 21. The upper mold 20A has a cylindrical shape, and its lower part is formed into a tapered surface 23 that slopes downward toward the outside from the mold center line 22. The upper mold 20B has a pressing mold function, and the lower mold 21 has a circular cross section that can be fitted into the upper molds 20A and 20B while maintaining an annular interval approximately corresponding to the thickness of the circular steel plate A. It includes a convex portion 24 and a tapered surface 25 that faces the tapered surface 23 of the upper mold 20 in a parallel manner at a lower portion of the outer periphery of the convex portion 24 .

The fourth mold device 4 shown in FIG. 1(V) has a rotation center line 26 extending in the vertical direction. The fourth mold device 4 includes
A convex portion 27 and a tapered surface 28 are formed which are approximately the same size and shape as the convex portion 24 and tapered surface 25 of the third mold device 3. One pressure roller 7 attached to the fourth mold device 4 is
It has a cone shape, and is movable vertically at one location on the convex part 27, with the large diameter side facing the outer peripheral part of the convex part 27, and with a length extending from the center of the convex part 27 to the outer peripheral part. It is located. The lower part 29 of the roller pressure surface is held parallel to the upper surface 30 of the convex portion, and therefore the rotation center line 31 of the pressure roller 7 is inclined by that amount. The other pressure roller 8 attached to the fourth mold device 4 has a rotation center line 32 extending in the vertical direction and is disposed on one side of the fourth mold device 4 so as to be movable in the left-right direction. There is. The rolling roller 8 has
A pressure surface 34 parallel to the peripheral surface 33 of the convex portion 27 and a pressure surface 35 parallel to the tapered surface 28 are formed.

The fifth mold device 5 shown in FIG. 1 (Vl) includes upper molds 36A, 3
6B and a lower mold 37. A recess 38 with a circular cross section is formed in the lower part of the upper die 36A, the upper die 36B has a suppressing function, and the lower die 37 has an annular interval approximately corresponding to the thickness of the circular steel plate A. It is provided with a convex portion 39 that can be held and inserted into the concave portion 38 of the upper die 36. The height and diameter of the convex portion 39 are almost the same as those of the convex portion 27 shown in (V),
At the lower part of the outer periphery of this convex portion 39, there is a tapered surface 2 shown in (V).
A horizontal surface 41 is formed through a tapered surface 40 that has approximately the same inclination as 8 and is shorter in length than the tapered surface 2B. Furthermore, a tapered surface 42 and a horizontal surface 43 are formed at the lower outer periphery of the upper side 36 and are opposed in parallel to the tapered surface 40 and horizontal surface 41 of the lower die 37, respectively.

The sixth mold device 6 shown in FIG.
6. The lower mold 45 has a lower mold 37 shown in (■).
A convex portion 47, a tapered surface 48, and a horizontal surface 49 that are substantially the same as those of the above are formed. Further, the upper die 44 has the convex portion 47. A holding surface 50 along the tapered surface and the horizontal plane 49, and a rotation center at the outer periphery of this holding surface 50! J! It has an annular recess 51 formed around 46. The rolling roller 9 attached to the sixth mold device 6 has a rotation center line 52 extending in the vertical direction, and is disposed at a location l on the side of the sixth mold device 4 so as to be movable in the horizontal direction. ing. On the outer periphery of the rolling roller 9, there is an annular protrusion 53 that can be fitted from the outside of the annular recess 51 between the upper and lower molds with a constant gap maintained vertically when the sixth mold device 6 is closed as shown. is formed, and annular MI surfaces 54 and 54 are formed above and below the base of the annular convex portion 53.

Next, a method of manufacturing a so-called cup-shaped primary cylinder using the above configuration will be described.

■First, the circular steel plate A shown in Fig. 1 (CI) is
), the circular steel plate is set concentrically on the lower mold 11 of the first working mold device 1, and is sandwiched between the upper and lower molds 10 and 11, so that a circular steel plate is formed between the annular protrusion 13 and the annular recess 14. A bent portion 60 that annularly projects toward the lower surface is formed on the peripheral edge of A.

■The circular steel plate A formed as shown in Figure 1 (II) is
Thereafter, as shown in FIG. 1(m), the molds are set concentrically on the lower mold 16 of the second mold device 2 and held between the upper and lower molds 15 and 16. At this time, the bent portion 60 of the circular steel plate A
is restrained in the annular recess 18 of the upper mold 15 in the steel plate diameter direction, that is, in the direction of arrow B, and is pressurized from both upper and lower sides, so that the bent portion 60 is the depth of the annular recess 18 ( This is a thick portion 61 that protrudes upward from the other portions.

■The circular steel plate A formed as shown in Figure 1 (I[[) is
Then, with the thickened part of the thick part 61 facing upward,
It is set concentrically on the lower mold 21 of the third mold device 3 shown in FIG. 17, and then the upper mold 20 is driven downward to undergo drawing processing. That is, in this step, the central part of the circular steel plate A is squeezed into the upper mold 20 by the convex part 24 of the lower mold 21, and the peripheral part of the circular steel plate A is squeezed into the taper of the lower mold 21 by the tapered surface 23 of the upper mold 20. It is pressed against the surface 25, thereby forming a so-called cup-shaped body 64 with a flange, in which a cup portion 62 is located in the center and a flange portion 63 is located on the periphery.

■Cup-shaped body 64 with a brim formed as described above
is then transferred to the fourth mold device 4 as shown in FIG. 1(V), and the cup portion 62 is fitted into the convex portion 27,
The pressure roller 7 is on the upper surface of the cup portion 62, the pressure surface 34 of the other pressure roller 8 is on the outer peripheral surface of the cup portion 63, and the thick portion 61 of the brim portion 63 is attached to the tapered surface 28. With the pressurizing surfaces 35 pressed against surfaces other than the rollers, the fourth mold device 4 is rotated along with the flange cup-shaped body 64 about the center line 26 that extends between these rollers. 7.8 rotates, the repressurizing roller 7.8 repeatedly applies a load to almost the entire area of the cup-shaped body 64 with a flange, except for the thick part 61, and the resulting cup-shaped body 64 is work-hardened. strength is improved.

■The flange cup-shaped body 64 whose hardness has been improved as described above is then transferred to the fifth mold device 5 shown in FIG. 1 (Vl).
can be transferred to. In this process, the upper mold 36 is driven downward with the cup portion 62 of the flange cup-shaped body 64 fitted into the convex portion 39 of the lower mold 37, so that the outer peripheral side of the flange portion 63 is lowered. It is pressed against the horizontal surface 41 of the mold 37 and bent horizontally.

(2) The cup-shaped body 64 with a brim that has gone through the above steps is finally transferred to the sixth mold device 6 shown in FIG. 1 (2-1). In this step, first, the cup portion 62 of the flange cup-shaped body 64 is fitted onto the convex portion 47 of the lower mold 45, and the upper mold 44
The thick part 61 of the collar part 63 fits into the annular recess 5,
With the flange cup-shaped body 64 completely sandwiched between the upper and lower molds 44 and 45, the sixth mold device 6 is rotated along with the flange cup-shaped body 64 about their common center line 46. At the same time, the rolling roller 9 is horizontally driven in the direction of the arrow E, and the annular convex portion 53 forms the thick portion 61 of the collar portion 63.
The rolling roller 9 rotates. At this time, the thick wall portion 61 is accommodated in the annular recess 51 and is restrained in the wall thickness direction and toward the center of the steel plate, and as shown in FIG. 1 (■-2), the rolling roller 9 is By being driven by a predetermined amount in the direction, the annular convex portion 53 of the rolling roller 9 bites into the thick wall portion 61, and as a result, a seal ring fitting +ll65 is formed on the outer periphery of the collar portion 63. At that time, the seal ring fitting groove 65 is also
The outer diameter d of both side walls, that is, the rim portion (see FIG. 2 (1)) 66 is regulated.

FIG. 2(I) is an enlarged view of the seal ring fitting groove 65 formed as described above. Although the groove 65 has a rectangular cross section, it can also be formed into a hemispherical shape, for example, as shown in FIG. 2 (II). Furthermore, although the rim portion 66 shown in FIG. 2 (CI) is offset to one side of the collar portion 63, it may be formed to protrude symmetrically on both sides of the collar portion as shown in FIG. 2(m), for example. You can.

FIGS. 3(I) to (■) show a manufacturing process according to a modification of the first embodiment, and the steps are listed below.

Incidentally, parts that are the same as or equivalent to those of the first embodiment are given the same reference numerals.

■The circular steel plate A as the material shown in Figure 3 CI) was
As shown in FIG. 1(II), a cup-shaped body 64 with a brim is formed by the molding device 3 (corresponding to FIG. 1(IV)).

■As shown in FIG. 3(m), the flange cup-shaped body 64 is attached to the mold device 4, and both are rotated about the center line 26, and pressure is applied to the surface of the flange-shaped cup-shaped body 64. The strength of the flange cup 64 is increased by pressing the roller 7.8 (corresponding to FIG. 1(V)).

(2) As shown in FIG. 3 (IV), the outer peripheral side of the brim portion 63 of the flange cup-shaped body 64 is bent horizontally using the mold device 5 (corresponding to FIG. 1 (Vl)).

(2) As shown in FIG. 3(V), a fold 1III portion 14 is formed on the outer periphery of the brim portion 63 using the mold device 1 (corresponding to FIG. 1(II)).

■As shown in FIG. 3 (VT), the folded portion 14 is compressed by the mold device 2 to form a thick portion 61 (see FIG. 1 (VT)).
m)).

■As shown in FIG. 3 (■), the pressure roller 9 is finally pressed against the thick wall portion 61 to form the seal ring fitting groove 65 (corresponding to FIG. 1 (■-2)). .

4(I) to (■) relate to claim 2 of the present invention. This is an embodiment showing the manufacturing process of a so-called disk-type primary cylinder.

The steps in FIG. 4 CI), (II), and (m) are the same as those described in FIG. , the explanation thereof will be omitted. The third mold device 70 shown in FIG. 4 (IT) has a rotation center line 71 extending in the vertical direction.
The lower mold 72 has a material receiving surface 73 made of a flat horizontal surface formed on the upper surface of the lower mold 72.

In addition, at the lower part of the outer peripheral side of the upper mold 74 of the third mold device 70,
The four annular portions 51 described in FIG. 1 (■-1) are formed, and the pressure roller 7 described in FIG. 1 (V) is provided in a region closer to the rotation center line 71 than the annular recess. .

Also, on one side of the third mold device 70, there is a
) is arranged.

On the other hand, a punching device 75 is shown in FIG. 4(V).

This punching device 75 has a punching hole 7 in the center of the material support table 76.
7, a punch 78 that can be fitted from above is disposed in the punch hole 77, and a material presser 79 is provided on the outer periphery of the punch 78.

Further, a burring device 81 is shown in FIG. 4 (Vl). That burring outfit! ! 81 includes a material support stand 82 and a material presser 83 disposed on the upper part thereof,
A burring rod 84 that is driven in the vertical direction is arranged in the center of the material support stand 82 .

Next, a method of manufacturing a so-called disk-type primary cylinder using the above configuration will be described.

■Through the steps shown in Figure 4 (II) and (m), the circular steel plate A having the thick walled portion 61 on its outer periphery is then
It is sent to the third mold device 70 shown in FIG. In this third mold device 70, first, the circular steel plate A is set concentrically on the lower mold 72 with the thickened part of the thick part 61 facing upward,
Subsequently, the upper die 74 is driven downward, so that the pressure roller 7 is pressed onto the thin wall surface of the circular steel plate A over almost the entire width thereof, and the inside of the annular recess 51 of the upper die 74 is pressed. The thick portion 61 of the circular steel plate A is housed in the .

(2) Thereafter, the lower mold 72 of the third mold device 70 is rotated together with the circular steel plate A about their common center line 71.

As a result, the pressure roller 7 rotates and a repeated load is applied almost forwardly to the thin wall portion of the circular steel plate A except for the thick wall portion 61, and the resulting work hardening strengthens the circular steel plate A. In parallel, the rolling roller 9 is driven horizontally in the direction of arrow E, the annular convex portion 53 is pressed against the outer peripheral surface of the thick portion 61, and the rolling roller 9 is rotated. At this time, the thick portion 61 is accommodated in the annular recess 51 and is restrained in the direction of the thickness Jγ and the center of the steel plate, and the rolling roller 9 is further driven by a predetermined amount in the direction of the arrow E. The annular convex part 65 of the forming roller 9 bites into the thick part 61,
As a result, a seal ring fitting groove 6 is formed on the outer periphery of the circular steel plate A.
5 is formed. In addition, at this time, the outer diameter d of the both side walls of the seal ring fitting groove 65, that is, the rim portion (see FIG. 2 (1)) 66 is regulated by the annular regulation fljJ surfaces 54 and 54 located above and below the annular convex portion 53. Ru.

■The circular steel plate A that has undergone the above processing is then processed as shown in Figure 4 (V
) and fixed by a presser foot 79 on a support stand 76 of a punching device 75. Then, by lowering the punch 78, the central portion of the circular steel plate A is punched out, and the shaft hole 85 is formed.

(2) The circular steel plates A that have undergone the above steps are sent in pairs to a burring device 81 shown in FIG. Thereafter, the rod 84 is driven upward, so that the circumference of the shaft hole 85 is lifted up.
As a result, a predetermined disk-shaped primary cylinder having a boss portion 85 in the center is formed.

[Effects of the Invention] Since the present invention is configured as described above, it produces the following effects.

According to the method for manufacturing a sheet metal part such as a primary cylinder of claim i, work hardening is caused to the drawn cup-shaped body with a flange by roller processing, so that even if the thickness of the material is thin, it has sufficient strength. , a so-called cup-shaped primary cylinder is obtained. In addition, the work hardening mentioned above is
Since the material is applied after pressing a circular steel plate into a cup-shaped body with a brim, the above-mentioned pressing process is easily performed.As a result, the durability of the manufacturing equipment is reduced and its structure is simplified. cost reduction will be realized.

After forming two more thick parts, the seal ring fitting groove is formed using a rolling roller.
It is possible to improve the machinability and groove strength of the seal ring fitting groove.

Further, according to the invention of claim 2, since the circular steel plate as the raw material is work-hardened by roller processing, a so-called disk-shaped primary cylinder can be obtained that has sufficient strength even if the thickness of the raw material is thin. . Since the seal ring fitting groove is formed by the rolling roller after the thick portion is formed, it is possible to improve the workability and groove strength of the seal ring fitting groove.

[Brief explanation of drawings]

Figure 1 CI) - (■ indicates the first embodiment showing the manufacturing process of the primary cylinder according to claim 1, Figure 2 CI) - (
m) is an enlarged view of the seal ring fitting groove, Fig. 3 (I)
-(■) are second embodiments showing the manufacturing process of the primary cylinder according to claim 1, and FIGS. 4(I) to (VI) are examples showing the manufacturing process of the primary cylinder according to claim 2. A...Circular steel plate 2.3, 4.70...Mold device 7.8...Pressure roller 9...Rolling roller 26.46.71...Center line 60...Folding Curved portion 61...Thick wall portion 62...Cup portion 63...Brim portion 64...Cup-shaped body with brim 65...Seal ring fitting groove

Claims (1)

[Claims] (1) A step of forming a bent part that protrudes annularly on one side on the peripheral edge of a circular steel plate using a mold device, and a process in which the bent part is restrained in the diametrical direction of the steel plate by a mold device, and both sides of the steel plate are a step of forming a thick part by applying pressure from one end to the other; a step of drawing the central part of the circular steel plate using a molding machine to form the circular steel plate into a cup-shaped body with a brim; Improving the hardness of the cup-shaped body by pressing a pressure roller against the surfaces of the cup portion and the brim portion of the cup-shaped body with the flange while the body is rotated about its center line; While the cup-shaped body is rotated about its center line and the thick-walled portion is restrained in the thickness direction and toward the center of the steel plate, a rolling roller is pressed against the outer peripheral surface of the thick-walled portion to form a seal ring fitting groove. 1. A method for manufacturing sheet metal parts such as a primary cylinder, comprising the step of forming. (2) Forming a bent part projecting annularly on one side on the peripheral edge of the circular steel plate using a molding device; a step of applying pressure from both sides to form a thick portion; and a step of pressing a pressure roller against the surface of the circular steel plate while rotating the circular steel plate about its center line to improve the hardness of the circular steel plate. , the circular steel plate is rotated about its center line, and the thick wall portion is restrained in the wall thickness direction and toward the center of the steel plate, and a rolling roller is pressed against the outer circumferential surface of the thick wall portion to form a seal ring fitting groove. 1. A method of manufacturing sheet metal parts such as a primary cylinder, comprising the step of forming a primary cylinder.