JPS60201124A - Manufacture of synchronizer ring with paper liner - Google Patents

Abstract

PURPOSE:To improve adhesive strength of a paper liner and its surface accuracy, by manufacturing a synchronizer ring with the paper liner by a continuous process. CONSTITUTION:A synchronizer ring 10 with a paper liner is manufactured by a continuous process such that a bow-shaped piece 26, being punched from the material plate of a paper liner 14 and aligned to a conic surface-developed shape of the synchronizer ring 10, is molded so as to meet its conic surface, and the paper liner 14, molded into a conic surface shape and piled up on one another in a cartridge 28, is supplied on the conic surface of a ring 12 and assembled in the ring 12 to be molded by heating and pressurizing. The synchronizer ring 10, because it is manufactured in such a manner as described in the above, can be efficiently manufactured by the continuous process, improving adhesive strength of the paper liner and its surface accuracy with less thickness of an adhesive agent film and less unevenness of a molding condition.

Description

[Detailed Description of the Invention] In more detail, regarding the manufacturing method of the friction material, the friction material is used in the synchronous mesh of the manual gear transmission used in automobiles. This invention relates to a method for manufacturing a synchronizer ring with a paper liner bonded thereto.

In a gear transmission system, a synchronizer ring is arranged between the shaft and the gear, and the conical surface on the inner side or the gear 1 side is frictionally engaged with the corresponding circle of the shaft or gear to synchronize the gears. method is known. Such a synchro iser ring has a friction surface having a sufficient friction coefficient and wear resistance on the conical surface of the friction engagement reservoir.

JP-A-51-99851 discloses one such synchronizer ring in which a paper base material or paper liner impregnated with a synthetic resin is adhered to a synchronizing surface. A paper liner is formed by impregnating a coarse, porous paper base material such as cotton, inorganic, metal, cellulose, or synthetic fiber with a thermosetting resin.

Conventionally, such a synchronizer ring has been manufactured by an operator who manually wraps a band-shaped paper liner around the synchronization surface of the synchronizer ring, adheres it, and then cuts off the unnecessary portion. This conventional manufacturing method has problems such as extremely low work efficiency and low product reliability because it is performed manually by an operator. Furthermore, when a thin, hard paper liner is rolled up and wound, there is a problem in that the paper liner tends to break and there is a lot of waste.

It is an object of the present invention to solve the above-mentioned problems and provide an efficient and reliable method for manufacturing a synchronizer ring with a paper liner.

Examples of the present invention will be described below.

1 and 2 show a synchronizer ring 10 manufactured by the manufacturing method of the present invention.

The synchronizer ring 10 is constructed by bonding a paper liner 14 as a friction material onto the inner circumferential surface of a ring body 12, which has a truncated conical inner circumferential surface and an outer circumferential surface having a large number of teeth extending outward. The ring body 12 is made of iron or V'i copper-based metal by forging, pressure casting, embossing, or the like.

The synchronizer ring 10 is manufactured by the manufacturing method of the present invention shown in FIGS. 3 to 7, that is, the steps of manufacturing the paper liner 14, cutting, molding, adhering to the ring body 12, and cutting out the protruding portion. Manufactured.

The manufacturing process for the paper liner 14 is itself known. A long base material 20 made of cotton, inorganic, metal, cellulose, or synthetic fibers is wound into a roll and continuously pulled out. The continuously drawn base material 20 is immersed in a stock solution of a thermosetting resin such as a phenolic resin, air-dried, and then thermally hardened to form a lining 22 having a coefficient of friction of 0.10 or more.

The lining 22 is further pulled out and an adhesive 24 is applied in a conventional manner. That is, a flow coater distributes and applies a predetermined amount of adhesive in the form of a strip extending perpendicularly to the drawing direction on the lining 22 that is continuously drawn out, or a one-stripe adhesive is applied to the outer peripheral surface of a rotating roller. On this day, the adhesive 24 is applied by a roll coater or the like which applies the adhesive 2 lining onto the adhesive 2 lining with the lining 22 in contact.

The lining 22 coated with the adhesive 24 forms the paper liner 14 by drying.

Next, the paper liner 14 undergoes a die-cutting process shown in FIG. 5, and the arcuate piece 26 is die-cut in the direction in which the paper liner 14 is pulled out, with the inner circumferential surface of the ring body 120 having a truncated conical shape developed.

The shape of the arcuate piece 26 changes depending on the size of the circumference of the upper and lower surfaces and the height of the truncated cone, including the inner peripheral surface. Since the arcuate piece 20 is die-cut with its outer arc and the inner incision arc of the next arcuate piece in contact with each other, the amount of unusable parts discarded after die-cutting is minimized.

After cutting, the arcuate piece 26 is automatically curled by a molding machine and formed into a truncated cone shape 27 as shown in FIG. Paper liner 14i formed into a truncated cone shape 27
d, g7 A plurality of cartridges are stacked one on top of the other in one square of the recess of the cartridge 28, as shown in the figure, and stored. If all such cartridges are replaced, as will be described later, the paper liner 14 can be continuously and automatically supplied when bonding to the ring body, thereby improving work efficiency.

The adhesion of the truncated conical shape 27 to the inner peripheral surface of the ring body 12 is as follows:
This is carried out using a well-known hot press. That is, the ring main body 12 is installed in a mold of a press device with the truncated conical bottom surface of the inner circumferential surface facing upward, and the above-mentioned cartridge 28 is formed into a truncated conical shape, and the ring main body 12 is filled by the fully automatic feeding system for the above-mentioned cartridge 28 and the truncated conical liner 14. 12 and press-formed at a predetermined temperature and pressure. At this time, the paper liner 14 is adhered to one side of the inner circumference of the ring body 12, and the thermosetting resin impregnated into the paper liner 14 and remaining uncured is finally cured. The inner circumferential surface of the ring body 12 has a diameter of 100 mm extending between the other ends for oil drainage. Although it is necessary to form a groove 416, this groove 16V'i can be formed at the same time during pressing or by machining after pressing.

After press molding, the paper liner 14 protruding from the ring body 12 is trimmed and cut off to form the synchronizer ring 10.

In Example 11 below, we have explained the case where the conical surface, which is the friction surface, is on the inner circumference of the ring, but it is clear that the present invention can also be applied to cases where the conical surface is on the outer circumference. It is. Also, each process needs to be executed continuously 1-t
a<, it may be applied in each step in a batch manner.

According to the manufacturing method of the present invention as described above, compared to the conventional manual manufacturing method, it is possible to not only manufacture a synchronizer ring with a paper liner efficiently in a continuous process, but also to reduce the need for adhesive, pattern thickness, etc. Since variations in molding conditions can be reduced, adhesive strength and paper liner surface precision can be improved, resulting in a high-quality and highly reliable synchronizer ring. Further, since the paper liner is shaped so as to merge with the conical inner circumferential surface of the ring, and is continuously cut out adjacently to avoid wastage of the paper liner, manufacturing costs can be kept low.

[Brief explanation of the drawing]

i, Figure 141 is a front view of the synchronizer ring manufactured by the manufacturing method of the present invention, Figure 2 is a cross-sectional view taken along line 1-1 in Figure 1, and Figure 3 is a part of fυ・1. Fig. 4 is a front view of the paper liner, Fig. 5 is a plan view of the paper liner from which the arcuate piece has been cut out, Fig. 6 is a perspective view of the arcuate piece after curling, and Fig. 7 is a conical view. FIG. 7 is a perspective view of a cartridge that holds trapezoidal paper liners in a stacked tray. (Explanation of symbols of main parts) 10 - Synchronizer ring 12... Ring body 14... Paper liner 20 - Base material 22... Lining 24 - Adhesive 26 - Arcuate piece 27 - truncated cone shape 28 - Cartridge passage No. 37 Fig. 4

Claims (1)

[Scope of Claims] 1. A method for manufacturing a synchronizer ring with a paper liner for synchronizing gears in a gear transmission device, which achieves synchronization by friction of conical surfaces, the method comprising: forming a conical surface of the synchronizer ring (corresponding to the shoulder shape) from an original paper liner plate; a die-cutting step for punching out an arcuate piece, a molding step for forming the arcuate piece to fit the conical surface of the synchronizer ring, and an adhesion step for gluing the paper liner formed into the conical shape onto the conical surface of the ring. A method for manufacturing a synchronizer ring with a paper liner, characterized in that the method for manufacturing a synchronizer ring according to item 1 of the Jml box of the second patent claim includes: In the bonding step, the ring is formed into a conical shape. A process of stacking paper liners into a cartridge, a supply process of supplying the paper liner in the cartridge onto the conical surface of a ring body, a press process of molding the paper liner incorporated into the ring body by heating and pressure. A method for manufacturing a synchronizer ring with a paper liner, characterized by: