JPH0689374B2 - Sizing method for flanged tooth profile parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is designed to fill a valley between teeth in a tooth shape having an annular outer peripheral side and having a tooth profile which is uneven in the circumferential direction, and a part of the tooth in the axial direction. A flanged tooth profile part having a formed flange,
A dimensional accuracy improving shaping method, that is, a sizing method.

[Conventional technology]

In the sizing of tooth profile parts, when the tooth profile part does not have a flange, it is disclosed in Japanese Utility Model Laid-Open No. 63-73330 and Japanese Utility Model Laid-Open No. 57-9.
The work can be shaped using a toothed die as disclosed in Japanese Patent No. 6742 and Japanese Patent Publication No. 622001/1987. However, the tooth profile parts to be sized are
As shown in FIG. 4B, it is annular and has, on the outer peripheral side, a toothed tooth 12 that is uneven in the circumferential direction and a flange 14 that is formed in a part of the axial direction so as to fill the valley portion between the toothed 12 In the case of the tooth profile component 10, if teeth are provided on the die, the teeth of the die and the flange of the workpiece, which is the tooth profile component with the flange, are forced to insert the workpiece into the shaping hole of the die. , It is not possible to add teeth to the surface of the die shaping hole because they interfere with each other.

Therefore, conventionally, in the sizing of the toothed component 10 with a flange, as shown in FIG. 5, a die 20 having no teeth in the shaping hole 22, that is, a toothless die is used.
The work consisting of the preformed body 10 'of the toothed component 10 with a flange is forcibly inserted by the upper punch 40 into the gap between the core 30 and the core 30 arranged concentrically with the upper punch 40 and the lower punch. It was sized by sandwiching with 50 and pressing.

[Problems to be Solved by the Invention]

However, in the conventional sizing, the dimensional accuracy is improved only in the outer diameter, inner diameter and height of the work, but the dimensional accuracy of the teeth 12 of the work is not improved because the toothless die 20 is used. That is, the teeth 12 themselves are not sized, and the accuracy of the tooth surface and the accuracy of the tooth pitch cannot be improved.

The present invention relates to a sizing method for a flanged tooth profile part, which has a flange formed so as to fill a tooth space between teeth in a part of an axial direction, in addition to the teeth, and a sizing method for a flanged tooth profile part that can also size a tooth The purpose is to provide

[Means for Solving the Problems]

According to the present invention, the above objects and problems can be solved and achieved by the following sizing method for a flanged tooth profile part.
That is, before sizing a flanged tooth profile component, which is annular and has, on the outer peripheral side, teeth having a tooth profile that is uneven in the circumferential direction and a flange that is formed so as to fill a valley between the teeth in a part of the axial direction of the tooth. The preform of (1) is inserted between a die having a shaping hole and a core arranged in the shaping hole at intervals in the radial direction, and the preform is crushed by upper and lower punches to form the preform. A method for sizing a flanged tooth profile part to be molded into a final molded product with improved dimensional accuracy, according to the following: A flanged tooth profile at a position separated from the workpiece insertion side end of the molding hole as the die. The final profile of the part has a tooth profile that is female to the profile of the tooth profile, and has a die tooth profile with a crest diameter smaller than the diameter of the shaping hole, and a groove with the same root diameter as the tooth profile of the die profile. It has a bottom diameter and Use a die with a plurality of phasing grooves that extend continuously from the end of the insert side to the end of the die opposite to the side where the work is inserted and whose phase and groove width match the troughs of the tooth profile of the die tooth profile; , A preformed body whose outer diameter is slightly smaller than the shaping hole of the die is used: The tooth profile of the preformed body is circumferentially aligned with the phase alignment groove of the die, and the preformed body is aligned with the phase alignment groove. And insert it into the die shaping hole to position the tooth part of the pre-shaping body at the position of the die tooth profile of the die-shaping hole, and crush the pre-shaping body with the upper and lower punches as much as necessary to separate it into the die and core. By sizing, the entire preform is shaped and shaped into the final shaped product, including the shaping of the toothform of the preform with the die tooth profile. Method.

[Action]

In the method for sizing a flanged tooth profile component of the present invention, since the preform is a little smaller than the die diameter (shaping hole inner diameter), it can enter the shaping hole of the die, and the flange of the preform has a die tooth profile. It stops when it hits one end of the section. At this time, the tooth profile of the preform is already in mesh with the die tooth profile. At this position, the upper and lower punches push and deform the preform, so that the whole preform including the tooth profile is formed (length, inner diameter, outer diameter, flange shape).

What is important in such molding is that the phase of the tooth profile of the preform and the phase of the die tooth profile must be matched, and the tooth profile of the preform must be inserted up to the die tooth profile to form a meshing relationship. That is. In the present invention, the phasing groove formed in the shaping hole of the die achieves phasing between the die and the preform. That is, when the preformed body is inserted into the shaping hole of the die, the inclination of the preforming body and the shaping hole at the time of insertion or the shift of the center position naturally causes the teeth of the preforming body and the phase matching groove of the die. The phases are matched, and the preform is directly inserted into the shaping hole along the phase matching groove. Since the phasing groove is in phase with the valley of the die tooth profile, the teeth of the pre-shaping body can slide axially into the valley of the die tooth profile. If such a phase matching groove is not provided, considering that the end of the tooth of the preform hits the end of the tooth profile of the die and does not enter the die tooth profile, the phase matching groove was provided. The significance of is clear.

〔Example〕

Hereinafter, a preferred embodiment of a sizing method for a flanged toothed part according to the present invention will be described with reference to the drawings from FIG. 1 to FIGS. 4A and 4B.

A flanged tooth profile part sizing method according to the present invention is a pre-molded body 10 ′ of a flanged tooth profile part 10 before sizing, a die 60 having a shaping hole 64, and a shaping hole 64.
A core disposed within the surface 66 of the shaping hole 64 with a space therebetween.
Insert between 80 and preform 1 with upper and lower punch 90,95
It comprises a sizing method in which 0'is crushed and the preform 10 'is moved to the die 60 to form the final shaped product 10 in which the dimensional accuracy of the whole including the teeth 12 is improved.

A shaping hole 64 penetrates through the die 60.
In the example shown in the figure, it extends in the vertical direction, and coincides with the direction of insertion and loading of the preform 10 ′ inserted from the top to the bottom. Dice 60
Is the end of the shaping hole 64 on the workpiece insertion side (upper end in the example shown).
A tooth profile portion 68 having a tooth profile that is a female type to the tooth profile of the tooth 12 of the final shaping product 10 of the flanged tooth profile component, and the tooth diameter of the tooth profile is smaller than the diameter of the shaping hole 64. Has been formed. 68a shows the peaks of the die tooth profile 68, and 68b shows the valleys of the tooth profile. The die 60 also has a groove bottom diameter that is the same as the root diameter of the tooth profile of the die tooth profile portion 68, and extends continuously from the work insertion side end of the die 60 to the die on the opposite side to the work insertion side, and the groove phase And a plurality of phasing grooves 70 whose groove width matches the phase and width of the roots of the teeth of the die tooth profile 68. The phasing groove 70 is recessed radially outward from the shaping hole surface 66 (the surface of the shaping hole 64 other than the phasing groove 70 and the die tooth portion 68). Since the phasing groove 70 extends continuously from the one end to the other end of the die 60, the root diameter of the die tooth portion 68 is recessed radially outward from the shaping hole surface 66.

The preformed body 10 'has teeth (tooth shape portions) 12' and flanges (flange portions) 14 ', which are respectively sized to form the final shaped product 10, teeth 12, and flanges 14. Preform 10 '
The outer diameter of is preformed to be slightly smaller than the diameter of the shaping hole surface 66 of the shaping hole 64 of the die 60. For example, as a toothed part with a flange, for example, a sintered product of an ESC (electric skid control) sensor rotor, the powder is formed through the steps of mixed powder → powder molding → dewaxing → sintering → sizing. In molding, a preform 10 'having an outer shape slightly smaller than the die diameter is formed.

Using the die 60 and the preform 10 ', the preform 10' is shaped (so-called sizing) into the final shaped product 10 as follows. First, the tooth profile of the tooth profile 12 'of the preform 10' is circumferentially aligned with the unevenness of the phase matching groove 70 of the die 60, and the preform 10 'is aligned with the phase matching groove 70 to form a die shaping hole. It is inserted into the position of the die tooth profile portion 68 of 64 by pushing by the upper punch 90. When the preform 10 ′ is inserted into the die shaping hole 64 by an operator, the preform 1
The 0'and the die shaping hole 64 are naturally aligned with each other when the axes are tilted or decentered from each other, and the teeth and the die of the preform 10 'are naturally formed.
The phase of the phase matching groove 70 of 60 is matched. As it is inserted, the tooth profile 12 'of the preform 10' meshes with the die tooth profile 68 of the die 60, and the flange 14 'of the preform 10'.
Hits the top of die tooth 68 and stops. At this time, the lower punch 95 is in contact with the lower end of the preform 10 '. Next, lower the upper punch 90 further to
The preformed body 10 'is crushed by a required amount by 90 and 95, the preformed body 10' is plastically deformed, and the preformed body 10 'is dies 60,
Final shaped product 10 of flanged tooth profile parts by shaping (filling up) the core 80, upper and lower punches 90, 95, and shaping.
To get This shaping is sizing.

In the above sizing, the phase matching groove 70 is formed by the die 60.
Therefore, the tooth profile of the tooth profile 12 'of the preform 10' and the tooth profile of the tooth profile 68 of the die 60 are aligned in the circumferential direction in a male-female relationship. Then, along the phasing groove 70 as it is, the preform 10 'is shaped into the shaping hole 64 of the die 60.
Since it is thrown into the inner part of the die (pushing by the upper punch 90), the tooth profile 12 'of the preform 10' is the tooth profile 68 of the die 60.
It is possible to reliably enter the tooth profile portion 68 without hitting the end of the tooth and stopping.

In the shaping as described above, the preform 10 'can be shaped in its entirety including the toothed portion 12'. In this case, the inner diameter side is shaped by the core 80, and the length is shaped by the upper and lower punches 90 and 95. 4A and 4B show the final shaped product 10 of the flanged tooth profile part.

〔The invention's effect〕

According to the sizing method of the flanged tooth profile component of the present invention, the following effects can be obtained.

(A) A die tooth profile 68 is provided in the shaping hole 64 of the die 60 at a position separated from the hole end, and the tooth profile 12 'of the preform 10' is provided.
Since the preform 10 ′ is inserted into the shaping hole 64 so as to be meshed with the die tooth profile portion 68 and is shaped, the entire shape including the teeth of the flanged tooth profile component can be shaped with high precision. Considering that it was not possible to shape the teeth in the past, the effect is that the teeth 12 can be shaped.

(B) When providing the die tooth profile portion 68 in the shaping hole 64 of the die 60, insert the preform 10 ′ into the die tooth profile portion 68 so that it does not stop by hitting the end portion of the die tooth profile portion 68. In the present invention, since the phase matching groove 70 is formed in the die 60, and the phase of the phase matching groove 70 and the phase of the valley of the tooth profile of the die tooth profile portion 68 are made to coincide with each other, the preform is required. Insert the 10 'tooth profile 12' into the die tooth profile 68 securely,
Can be engaged.

(C) In this case, the groove bottom diameter of the phasing groove 70 is set to the die tooth profile.
Since it matches the root diameter of 68, there is no step between the two and the tooth profile 12 'of the preform 10' can be smoothly moved to the die tooth profile.
Can be inserted into 68.

(D) Further, since the outer diameter of the preformed body 10 'is preformed to be slightly smaller than the inner diameter of the die 60, the preformed body 10' including the flange portion 14 'is inserted into the shaping hole 64 of the die 60. Can be made.

(E) When the method of the present invention is used for sizing the sensor rotor of ESC, the tooth surface and tooth pitch accuracy are improved, the control of the brake is improved, the braking distance is shortened, and the feeling during braking is improved. .

(F) Die 60 of preform 10 'in the mold during sizing
By filling up with, it became possible to improve the accuracy of the product tooth profile to the level of the mold accuracy without causing the tooth flanks in the flange step.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an apparatus and a preform used in a method for sizing a toothed part with a flange according to an embodiment of the present invention, in which the left half of the drawing shows before insertion and the right half of the drawing shows after insertion. 2A is a partial cross-sectional view of the die shown in FIG. 1 near the shaping hole of the die, FIG. 2B is a front view of a portion of the die shown in FIG. 1 near the shaping hole of the die, and FIG. 2C is shown in FIG. Partial plan view of the vicinity of the shaping hole of the die in the apparatus of FIG. 1, FIG. 3A is a partial plan view of the preform of the flanged tooth profile part, and FIG. 3B is a partial cross section of the preform of the flanged tooth profile part. Fig. 4A is a partial plan view of the final shaped product of the flanged tooth profile part, Fig. 4B is a partial sectional view of the final shaped product of the flanged tooth profile part, and Fig. 5 is a sectional view of a device used in a conventional sizing method. Is. 10 …… Final shaped product of toothed parts with flange 12 …… Tooth 14 …… Flange 10 ′ …… Preform 12 ′ …… Tooth profile (tooth) 14 ′ …… Flange (flange) 60 …… Die 64… … Shaping hole 66 …… Shaping hole surface 68 …… Die tooth profile 70 …… Phase matching groove 80 …… Core 90 …… Upper punch 95 …… Lower punch

Claims (1)

[Claims] 1. A flanged tooth profile component, which is annular and has, on the outer peripheral side, tooth-shaped teeth that are uneven in the circumferential direction and flanges that are formed in a portion of the tooth in the axial direction so as to fill the valleys between the teeth. The preformed body before sizing is inserted between a die having a shaping hole and a core arranged in the shaping hole with a space in the radial direction, and the preformed body is crushed by upper and lower punches and preformed. A method for sizing a toothed part with a flange for shaping a final shaping product with improved dimensional accuracy by moving the body into a die: As the die, a position separated from the work insertion side end of the shaping hole. It has a tooth profile that is a female type to the tooth profile of the final shaped product of the flanged tooth profile part, and has a tooth profile of the tooth profile whose diameter is smaller than the diameter of the shaping hole. Dies with the same groove bottom diameter Using a die with multiple phasing grooves that extend continuously from the work insertion side end to the die end on the side opposite to the work insertion side and whose phase and groove width match the valleys of the tooth profile of the die tooth profile; , A preformed body having an outer diameter slightly smaller than the shaping hole of the die is used; the tooth profile of the preformed body is circumferentially aligned with the phase alignment groove of the die, and the preformed body is aligned with the phase alignment groove. Insert it into the die shaping hole to position the tooth part of the pre-shaping body at the position of the die tooth profile part of the die-shaping hole, and crush the pre-shaping body with the upper and lower punches as much as necessary to separate it into the die and core. By sizing, the entire preform is shaped and shaped into the final shaped product, including the shaping of the tooth profile of the preform with the die tooth profile. .