KR101013480B1 - Method and apparatus for processing spline hub - Google Patents

Abstract

The present invention provides a method for molding a spline hub using a material into which one side is inserted: a blanking step (S10) of cutting the material to a predetermined size to generate a raw material; Generating an intermediate material having a spline on an outer circumferential surface while inputting the blanking raw material into a mold in multiple steps (S50); And generating a finished product by piercing the intermediate material with cutting (S90). At this time, the intermediate material generating step (S50) is a step (S10) of bending the outer circumferential surface on which the spline is formed (S10), the step of bending the outer circumferential surface on which the spline is formed at 60 ° (S20) and the outer circumferential surface on which the spline is formed to 75 ° And a step (S30) of bending, and a step (S40) of bending the outer circumferential surface on which the spline is formed at 90 °.

Accordingly, the present invention has the effect of minimizing cutting and increasing the dependence of plastic processing, while maintaining the processing quality and improving productivity by shortening the processing time.

Spline, Hub, Firing, Bending, Mold

Description

Spline Hub Forming Method and Apparatus {Method and apparatus for processing spline hub}

The present invention relates to a spline hub of an automobile, and more particularly, to a spline hub molding method and apparatus for improving productivity by shortening the process time while maintaining processing quality.

In general, in a manual transmission for transmitting power to the clutch disk and the clutch shaft, the clutch shaft is splined to the hub of the clutch disk so that the clutch disk performs a linear movement along the clutch shaft during power connection and interruption. The hub is fixed to the spline on the main shaft and has a gear on the outer circumference to engage with the sleeve to guide the movement and a key groove on the inner surface.

In manufacturing such a hub spline, the gears of the outer circumferential surface are formed depending on the cutting process and the GROUP method, thus increasing the working time and requiring a subsequent process for strengthening the processed structure.

On the other hand, Korean Patent Laid-Open Publication No. 2002-0040154 discloses, for example, a blanking process for forming a steel plate into a base material of a desired shape; A drawing step of forming a boss in the central portion of the base material formed by the blanking step; A piercing step of forming a flow path hole in the base material on which the boss is formed by the drawing step; The base material having the channel hole formed by the piercing process is heated at room temperature to occlude the ring punch of the press and the lower die cushion thereof, and in this state, the center punch located inside the ring punch and the outer punch located outside. And a cold forging process for compressing the inner surface of the base material and the outer surface of the base material with a ring punch on the formed boss tooth and the outer tooth shape.

This is expected to work efficiency due to the speed and simplicity of the work, but there is room for the problem of hardening of the process due to the rapid plastic deformation and the deterioration of durability.

Literature Information of the Prior Art

[Patent 1] Korean Laid-Open Patent No. 2002-0040154 "Method for Manufacturing Hub for Automatic Transmission"

[Patent 2] Korean Laid-Open Patent Publication No. 1999-0077992 “Method of manufacturing a hub flange for clutch”

Accordingly, the present invention is to fundamentally solve the conventional problems as described above, while minimizing the cutting process and increase the dependence of plastic processing, while maintaining the processing quality and can improve the productivity by shortening the process time It is an object of the present invention to provide a spline hub molding method and apparatus.

In order to achieve the above object, one aspect of the present invention provides a method for molding a spline hub using a injected material: a blanking step of cutting the material to a predetermined size to generate a raw material; Generating an intermediate material having a spline on an outer circumferential surface while the blanking raw material is input to a mold in multiple stages; And piercing the intermediate material with cutting to produce a finished product.

In addition, the step of generating the intermediate material according to the present invention includes the steps of bending the outer circumferential surface formed spline at 30 °, bending the outer circumferential surface formed spline at 60 °, bending the outer circumferential surface formed spline at 75 °, And bending the outer circumferential surface on which the spline is formed at 90 °.

According to another aspect of the present invention, there is provided an apparatus for manufacturing a splined hub using a injected material, comprising: a first mold for forming a splined surface of a 30 ° inclination using a punch and a die on a blanked raw material; A second mold for forming a splined surface of a 60 ° slope using a punch and a die on the intermediate material forming the splined surface of the 30 ° slope; A third mold for forming a splined plane having a 75 ° slope by using a punch and a die on the intermediate material forming the splined plane having a 60 ° slope; And a fourth mold for forming a splined surface having a 90 ° inclination by using a punch and a die on the intermediate material having the splined surface having a 75 ° inclination.

In addition, the second mold and the third mold according to the invention is characterized in that it comprises a pad plate on the die in the respective punch downward direction.

In addition, the fourth mold according to the invention is characterized in that it comprises a lower support plate for double buffering the die and the die holder.

In addition, the fourth mold according to the invention is characterized in that it comprises a stripper capable of vertical movement on the outer peripheral surface of the punch to take out the intermediate material from the die.

On the other hand, the terms or words used in the present specification and claims are not to be construed as limiting the ordinary or dictionary meanings, the inventors should use the concept of the term in order to explain the invention in the best way. It should be interpreted as meanings and concepts corresponding to the technical idea of the present invention based on the principle that it can be properly defined. Therefore, the embodiments described in the present specification and the configuration shown in the drawings are only the most preferred embodiments of the present invention, and do not represent all of the technical ideas of the present invention, and various alternatives may be substituted at the time of the present application. It should be understood that there may be equivalents and variations.

As described in the above configuration and operation, the present invention provides the effect of minimizing cutting and increasing the dependence of plastic processing, while maintaining the processing quality and improving productivity by shortening the processing time.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a flowchart showing the process according to the invention as a whole.

The present invention relates to a method for forming a spline hub using the input material, and first goes through a blanking step (S5) of cutting the material to a certain size to produce a raw material. After processing, the thickness of the material and the diameter of the blanking part are determined by considering the processing margin in the outer diameter and height dimension of the finished spline hub. Since the present invention proceeds mainly to plastic processing, the thickness of the material may be about 2 to 3 mm based on the carbon steel sheet.

In addition, according to the present invention, while the blanking raw material is introduced into the mold in a multi-step, the step of generating an intermediate material having a spline on the outer peripheral surface (S50). It is necessary to go through the process of forming the intermediate material in multiple stages in order to exclude the cutting process and to form the finished product only by plastic working. Intermediate material refers to the raw material of the intermediate process to increase the inclination angle of the outer peripheral surface as the spline is formed on the outer peripheral surface.

The intermediate material generating step (S50) of the present invention is a step (S10) for bending the outer circumferential surface on which the spline is formed (S10), a step (S20) for bending the outer circumferential surface on which the spline is formed (S20), and an outer circumferential surface on which the spline is formed 75 ° And a step (S40) of bending the outer circumferential surface on which the spline is formed at 90 °. Bending in the order of 30 °, 60 °, 75 °, and 90 ° can minimize work hardening or cracking caused by the formation of a small deformed tooth on the spline hub. Of course, each of these steps (S50) is performed sequentially using a mold apparatus to be described later.

In addition, according to the present invention includes the step of piercing the intermediate material and the cutting to produce a finished product (S90). After bending the outer circumferential surface by 90 ° (S40), the step of cutting the upper surface of the intermediate material (S60), the first piercing (INDEX SIDE PIERC'G) step of forming a noise prevention hole in a portion of the spline teeth ( S70), a second piercing (center and riveting HOLE PIERC'G) step of forming a through hole in the center portion for the counterpart assembly (S80).

2 is a main configuration of the mold required for the S10 process according to the present invention, FIG. 3 is a main configuration of the mold required for the S20 process according to the present invention, and FIG. 4 is a diagram of a mold required for the S30 process according to the present invention. 5 is a principal part configuration diagram of a mold required for the S40 process according to the present invention.

Another aspect of the present invention relates to an apparatus for producing a spline hub using the input material. In the step S50 of generating the intermediate material of FIG. 1 described above, the first mold 20 in step S10, the second mold 30 in step S20, the third mold 40 in step S30, and the fourth mold in step S40. 50 is used.

The first mold 20 of the present invention forms a splined surface of a 30 ° inclination using the punch 23 and the die 24 on the blanked raw material. The punch 23 is fixed to the upper mold plate 21 via the punch plate 26, and the die 24 is fixed to the lower mold plate 22 via the die plate 27. The first mold 20 may have a simpler structure than the mold of a subsequent step, but the inclined surface of the spline does not exceed 30 ° to reduce processing defects.

In addition, the second mold 30 of the present invention forms a splined surface of 60 ° inclined by using a punch 33 and a die 34 on the intermediate material forming the 30 ° inclined surface, and the third mold ( 40 uses a punch 43 and a die 44 to form a splined plane of 75 ° inclined on the 60 ° inclined intermediate material. Like the first mold 20 described above, the punches 33 and 43 are fixed to the upper plate 31 and 41 via the punch plates 36 and 46. However, the dies 34 and 44 are directly connected to the lower mold plates 32 and 42 and the block plates 38 and 48 and the base plate 39 and 49 are directed downward of the lower mold plates 32 and 42. To effectively absorb the impact force during plastic working. This is because plastic working with 60 ° and 75 ° inclined surfaces is more likely to produce machining defects than the previous step.

At this time, the second mold 30 and the third mold 40 are provided with pad plates 35 and 45 on the dies 34 and 44 in the downward direction of the respective punches 33 and 43. The pad plates 35 and 45 allow vertical movement by the cylinder and prevent deformation of the bottom surface during plastic deformation of the intermediate material. Of course, the pad plates 35 and 45 are made of high elastic resin or rubber to prevent scratches on the intermediate material during processing.

In addition, the fourth mold 50 of the present invention forms a splined surface of 90 ° inclined by using a punch 53 and a die 54 on the intermediate material having the inclined surface of 75 °. The punch 53 is fixed to the upper plate 51 via the punch plate 56. The die 54 is fixed to the lower die plate 52 and the block plate 58 and the cushion plate 59 are installed in the downward direction of the lower die plate 52. The block plate 58 and the cushion plate 59 function similar to those of the block plates 38 and 48 and the base plates 39 and 49 described above, but employ a mechanism having a larger buffering force such as a gas spring.

The fourth mold 50 has a lower support plate 55 which doublely buffers the die 54 and the die holder 57. The die holder 57 is fixed to the first lower support plate 55 through the lower support plate 55, accommodates the die 54 on the upper inner surface of the die holder 57, and The second lower support plate 55 is installed downward. The double support plate 55 is provided because the horizontal and vertical shocks generated in this process can be alleviated at the same time.

At this time, the fourth mold 50 is provided with a stripper 60 capable of vertically moving on the outer circumferential surface of the punch 53 to take out the intermediate material from the die 54. The stripper 60 performs the vertical motion on the punch 53 by a separate cylinder and allows the intermediate material processed with the outer circumferential surface to be 90 ° to be drawn out from the die 54.

Looking at the operation with reference to Figures 1 to 5, in step S10 the raw material of the circular plate material is placed in the center of the die 24 of the first mold 20 and the punch 23 of the upper die is lowered to 30 ° on the outer peripheral surface Forming the inclined surface, the intermediate material bent 30 ° in step S20 is seated on the pad plate 35 in the center of the die 34 of the second mold 30 and the punch 33 is lowered to form a 60 ° inclined surface In step S30, the 60 ° bent intermediate material is seated on the pad plate 45 in the center of the die 44 in the same manner, and the punch 43 is lowered to form a 75 ° inclined surface. In step S40, the die 54 By using the punch 53 and the lower support plate 55, the 75 ° inclined plane is plastically deformed to the 90 ° inclined plane in the same manner.

In this way, the machining time is much shorter than that of the conventional spline hub by cutting and GROUP methods, and defects such as work hardening are reduced as compared to other plastic processing methods.

It is apparent to those skilled in the art that the present invention is not limited to the described embodiments, and that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, such modifications or variations will have to belong to the claims of the present invention.

1 is a flowchart showing the process according to the invention as a whole;

2 is a main configuration diagram of a mold required for the S10 process according to the present invention;

3 is a main configuration diagram of a mold required for the S20 process according to the present invention;

4 is a main configuration diagram of a mold required for the S30 process according to the present invention;

5 is a main configuration diagram of a mold required for the S40 process according to the present invention.

Explanation of symbols on the main parts of the drawings

21, 31, 41, 51: upper plate 22, 32, 42, 52: lower plate

23, 33, 43, 53: Punch 24, 34, 44, 54: Die

26, 36, 46, 56: Punch plate 27: Die plate

35, 45: pad plate 38, 48, 58: block plate

39: base plate 55: lower support plate

57: die holder 59: cushion plate

60: stripper

Claims (5)

In the method of forming a spline hub using the input material: Blanking step (S5) of cutting the material to a predetermined size to generate a raw material; Bending the outer peripheral surface formed with the spline to 30 ° while the blanking raw material is introduced into the mold in multiple stages (S10), bending the outer peripheral surface formed with the spline to 60 ° (S20) and the outer peripheral surface formed with the spline 75 ° Generating an intermediate material having a spline on the outer circumferential surface through a step (S30) and a step (S40) of bending the outer circumferential surface on which the spline is formed at 90 °; And Spline hub forming method comprising the; and the step of piercing the intermediate material to produce a finished product (S90). delete In the apparatus for manufacturing a spline hub using the input material: A first mold 20 which forms a splined surface of a 30 ° inclination using a punch 23 and a die 24 on the blanked raw material; A punch plate 33 and a die 34 are used to form a splined surface of the inclined plane at the 30 ° inclination, and a pad plate is formed on the die 34 in the downward direction of the punch 33. A second mold 30 having a 35; A punch plate 43 and a die 44 are used to form a splined plane having a 75 ° slope on the intermediate material having the splined surface of the 60 ° slope, and a pad plate is formed on the die 44 in the downward direction of the punch 43. A third mold 40 having a 45; And The punch 53 and the die 54 are used to form the splined surface of the 90 ° inclination on the intermediate material having the splined surface of the 75 ° inclination, and the buffers of the die 54 and the die holder 57 are doubled. And a fourth mold (50) having a lower support plate (55) and a stripper (60) capable of vertically moving on the outer circumferential surface of the punch (53) to take out the intermediate material from the die (54). Spline hub molding machine. delete delete

Images