JPS60180635A - Flat die for rolling - Google Patents

Abstract

PURPOSE:To prevent the slip of a material to be worked with respect to a flat die at the initial stage of rolling by forming a flat part in the starting part of biting of the flat die and making the distance between the opposite flat parts of a pair of flat dies smaller than the diameter of the material. CONSTITUTION:In the biting starting-part 10a of a biting part A of flat die 10, a flat part 11 extending in the longitudinal direction of flat die 10 is formed at the side of inserting a material 1 to be worked, and edge-chamfered faces 12 and grooves 14 are formed at both sides of the part 11 to reduce the inserting resistance of material 1. Further, the roughness of the upper flat surface of flat part 11 is previously roughened. In rolling the material 1 by using a pair of the flat dies 10, the distance (l) between the flat parts 11 is previously made smaller than the diameter D of the peripheral surface of a working part of material 1 by a prescribed dimension. Then the slip of material 1 with respect to the flat die 10 at the initial stage of rolling is effectively prevented, and high working accuracy is obtained.

Description

[Detailed Description of the Invention] 11.1 The present invention relates to a flat die for rolling, and more specifically, measures are taken to prevent slippage between the biting start point and the workpiece in the biting part of the flat die. It is related to rolling and flattening dies.

When forming serrations or gears on the circumferential surface of certain types of liquid-added objects, such as the sector cylinder in an automobile's silling mechanism or the crankshaft in an engine Wl mechanism, An example of such a case is shown in FIG. 1, in which there is a case where it is necessary to perform a predetermined shape of rotation jΔ machining at a predetermined position on the circumferential surface.

FIG. 1 shows a workpiece 1, in which three gear teeth 2a, 21), and 2C are previously formed on the circumferential surface of one end 1a. The other end 11) has serrations 3 on the circular surface.
It is now formed by rolling and adding F.

A part of the serrations 3 has joining teeth 4 in which adjacent teeth are partially joined. The center line O passing through the center tooth 21) of the bonding tooth 4 is
It is assumed that C must be positioned so that it passes through the center of C. In this case, a set of flat dies for forming the serrations 3 is equipped with a special IJll for forming the joint 4 at its predetermined position. J to the machined tooth and said 7JIl tooth to form the joint tooth 44 In order to maintain a match, there must not be any feces between the rolled and added 1 middle ←, -1 added - 1 object 1, and a pair of flat dice.

(In order to prevent such 4r slippage, the rolling method shown in Fig. 2.33 has been conventionally provided.)
ri) Figure 2 shows that liquid addition-I object 1 is a set of flat dies, 'l if
, 5 I) shows a side view of the state in which it has been bitten into the biting part, and Figure 3 shows a cross-sectional view on the line 2 - [1].
C 3, this method d3 is not shown in Figure 2 J: sea urchin, - set of flat dice! ＋a、! +b is pre-moved in the direction of arrow IJ1°P2, tangent to 74a, and double-sided die 5a.

511 (=J part Δ) Initial settings are made so that the starting point parts 1c and 1.c face each other.
1 The workpiece 1 supported by the jigs 6 and 6C shown in FIG. There is something to do. At this time, the peripheral surface of the part 11) of the two things 1 to be subjected to the cooling process is each flat die! ia,! il) no kui f”
A portion of the starting point 1C is scraped off by each machining tooth 1d located at the starting point 1C. In other words, with this, - set of flat dies 5
a, 511 and liquid addition] - relative positioning of object 1 is performed. In this way, the workpiece is placed at the ``starting point'' of a set of flat dies, 13 and then 1 (1). Compared to the manufacturing method, the workpiece is flat die!ia, !+1
．． This will reduce the amount of slippage between the two.

However, even with this lj method, a slight amount of slipping still occurs, and it is still insufficient when a very high processing viscosity is required.

If we analyze the cause of slippage in this case as well, the following will become clear. 4T straw, J shown in Figures 4 and 5:
In FIG. 4, the end 111 of the workpiece is in contact with the upper surface of the first tooth H of each flat die 5a, 5, l), C15, while in FIG. The circumferential surface of 11) is in contact with two adjacent machined teeth 1d.

In other words, the contact area at d5 in Figure 4 is a person, and the contact area at d5 is a person.
In the figure, the contact area is small e. In this way, the liquid filler 1 rotates in the direction of the arrow Rh, and the flat die rotates 2 in the direction of the arrow Rh.
When moving in the direction J, the peripheral surface of the workpiece 1 to be rolled is rolled while changing the contact area with respect to the workpiece 1d.
I'm going to C. If the contact area changes by 1, - set of flat dies 5a, ! i b 4: This means that the frictional force that holds the workpiece 1 changes due to the second reason. 1) If the contact area between the workpiece 1 and the added teeth is small as shown in Figure 1), or if the workpiece is particularly heavy, or if the liquid is added ``If the center of gravity of the object is eccentric, then there will be a slight slippage between the objects because a large static pressure inertia force moves at the starting point 10.''

In order to prevent IJ2 from slipping like this...
It can be seen that the change in the contact area between the flat die and the processed meat of the flat die is <j, that is, if the contact area is kept constant, then J.

[Water A' and Q top] 1 Accordingly, C1 The object of the present invention is to create a part of the flat die with a part of the J3 starting point that is always approximately uniform with respect to the circumferential surface of the workpiece. By forming a part that contacts and moves with a contact area that is small, the negative effects caused by changes in the contact area between the two objects at the starting point of a3
The purpose is to prevent objects from slipping against the flat die.

[Material 1] In order to achieve the above objectives, the present invention is constructed as shown below.

1. That is, a flat part extending in the longitudinal direction of the flat die is formed in a part of the biting start point of the biting part q, and the flat lj4 part is
- In the reflex 1 to condition of the set of flat dies, -C1 was formed so that the interval between the opposing flat parts was smaller than the diameter of the workpiece by a predetermined increment.

J3 in the above configuration (the workpiece is a flat die)
Even at the starting point, the workpiece rotates while being in contact with the flat upper surface of each of the ten flat parts with an approximately equal contact area, so the workpiece is given a stable and strong clamping force between a pair of flat dies. This effectively prevents slipping of the flat die of the liquid additive.

In this way, if the Sr (relative to die, The force applied to the liquid I-E of the liquid becomes very small, and the force applied to the liquid I-E on the object gradually increases, and
Therefore, the disappearance of the X9 addendum to the flat die no longer matters.

Generally speaking, the flat top surface and the bottom surface of the flat die should be at the same level as the top surface of the tooth. , KuiE Part 1 L:,
Is it at the same level as the slope connecting the top surfaces of the two teeth?
It is good as long as they are parallel. [Shikajina l] Rira, (not limited to 1b, in short, a set of flat dozen r-
In the state of
As long as this is guaranteed, it may be flat with the bottom surface of the flat die.

Is the soil surface of the flat part marked L relative to the circumferential surface of the liquid-added EF object? In order to increase the frictional resistance, it is preferable to increase the roughness of the surface. In addition, a groove extending in the width direction of the flat die is formed in the liquid application part of the flat part to reduce the insertion resistance of the object 711 that weighs against the flat die. preferable.

Embodiments of the present invention will be described in detail below with reference to FIGS. 6 to 12.

6 and 7 show the plane and side views of one 517 die 10 according to this embodiment. In the figure, A is f1
The part, B, is the finishing part, and the relief part, C, is the bearing part.This structure is conventional and well known.

The start point part 10a of the tip of the flat die part A shown in FIGS. 6 and 7 is enlarged and shown in detail in FIGS. 8 and 0.

In the figure - U, 1 (lb = 63 C) is shown. Figure (as shown, this machined tooth 1
01) is only partially formed at the starting point portion 1C. In other words, at the biting start point 1()a -C
A flat part 11 extending in the longitudinal direction of the flat die is formed on the side into which the workpiece 1 is pressed, and a chamfered surface 12 and a flat part 11 are parallel to each other on both sides of the flat part 11. C extending vortex 1
4 is formed.

The chamfered surface 12 LL cover/11 has a groove C to facilitate insertion of the opening 1, and) seedling 14 #;L, KA1-
Tooth 1 (when applying lb, the end of the machined tooth is not formed unevenly on the flat surface 11). What you need-C
There isn't.

Jukihei 114 part 11 liquid addition J-object 1Φ human part 4r i.e. liquid addition -] Insertion direction in which two objects are interposed F) 3 [, 1 groove 13 is formed c J completed, Insert the liquid between a set of flat ties to reduce insertion resistance.

(1, i,
The relationship of the flat portion 11 to the darts surface 10c is as follows:
J shown in the diagram: Sea urchin C is 7, which is the length of the sea urchin.
Ii! If it is according to fPI, i151-J is in the section △.
Connect 15 Li7II and 7 Buddha I11 slope Do Ni1
-Lehel C?]・1' line wo nazu J,・)1 in 1・2
C is what forms the song.

The above (^"1 set of flat dies is 10th
Figure C shows θ [1 rolling force IL (for the first 1111 rolling of ,] JII,, l: The strength of the rolling force is as shown in Figure 10).

LJ, on the circumferential surface of part 11 of workpiece 1, the part in contact with machining 1'@1!i of -J section Δ is sequentially rotated and applied by this iJIJII tooth 15. ■-is (
go. -h, the part of each flat die 10 that is in contact with the flat part 11 receives surface heat which gradually increases by 1J due to this flat part (the workpiece is Sliding against the flat die is prevented.
The workpiece rotation function (1), which allows the workpiece to be rotated without slipping as the flat die advances, and (1) the workpiece rotation function, etc., are combined. There is a department.

However, of course, the tP dice! At the corresponding part of the liquid addition J object where the flat part 11 touches (maroration KA - ``ha applied I, yen, 1 follow ・), this flat gt + 11 ends at the supporting point 2 relation KA2 1 −
starts abruptly (J becomes 1.1.However, in reality, this flat flllllll length j method is sufficiently small compared to the entire length (J method) to the feeding part, so the SIL flat part Ration processing starts from the end of step 11 (- also, unbalanced addition with other parts such as this part is l!r)
4 (= resolved to -1- minutes at the end point of part J,
There are no particular problems.

In order to increase the frictional resistance against the liquid additive 1, there is ? In order to improve the anti-slip effect on the workpiece, it is better to cover the roughness of the surface. For example, Lint J), Toshite 1 Tsuto's method [This J: It is better to roughly spell the surface roughness.

In addition, if J is used in the example described in 1, l-, one surface of the flat part 11 should be parallel to the top surface of the teeth 1; , C in the present invention is as shown in FIG.
), the flat part IHhI-curve the bottom surface of each flat die 10c C
J Su・j and A (-J and 4 j, sea urchin 1111 formed C
bJ: Yes. However, in this case, it is necessary that the following condition f11 is satisfied.

TJ' 4r straw, - set of 1V tie + (1,10 A
-Distance between the bottom of the die and the bottom of the die is 1411)
1. 1. .1
1 distance between 11111 J2. is the workpiece 1
It is necessary that the diameter of the peripheral surface of the machined part is smaller by a predetermined dimension. In that case, if the flat dies 10.10 of the set move relative to each other during the rolling process, the liquid is applied to the opposite flat part 11 at approximately the same self-pressure C. By being pressed and clamped, the workpiece is completely prevented from slipping against the flat die.

1! As mentioned above, in Example 1-1, a flat part 11 of a certain quality is formed at the starting point of the flat die. 51 of one addendum
It is possible to effectively prevent slippage for one die, and achieve the intended purpose of the present invention.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an example of a liquid additive that is transferred and added, Figs. A side view of the workpiece in a flattened state;
The figure shows the state of rolling with the flat die shown in Figures 2 and 3.
Explanatory drawings, Figures 6''-12 show an embodiment of the present invention, Figure 6.7 is a plan view and side view of a flat die, and Figure 8 is a flat die shown in Figure 6.7. Fig. 9 is an enlarged right side view of Fig. 8, and Fig. 10 is an enlarged plan view of the main part of TJ showing the biting starting point in detail.
11 is a schematic explanatory diagram of the flat IlJ section according to the first embodiment, and FIG. 12 is a cross-sectional view showing the flat IJ section according to the second embodiment. There is an explanatory diagram. 1... Workpiece, la, 11+... End, 1c...
・Kuichi 1 starting point 1 d-...Ka1he, 2a, 2b, 2c
・=R, 3- L= 1/-S=+N, 4...Joint tooth, 5a,! il+...1] L die, 6... jig, 10... flat die, 1()a... iq starting point,
101)...Processed tooth, 10C...Dice mask, 11
... Flat part, 12 ... Chamfered surface, 13° 14 ... Groove, 1:) ... Add r, 1Mi+, △ ... Part 1 special Cypress Applicant Kobe Steel, Ltd. Tokoroha Ka, 1 person, Administrative officer, Ben Sokuju, 4 Yama, and 2 others Figure 1 Figure 3 Figure 7 Figure 8 Figure 9 Figure 10m Procedural amendment (voluntary) April 5, 1985 Commissioner for Patent Units Tono 1 1, Indication of the incident Patent Application No. 034656 of 1982 2, Name of the invention Flat die for rolling
Number 18ξ Name (119) 41 Type Ku, Ni'I! l Representative Fuyu Maki) 2 (1 person) 4. Representative 7. Contents of amendment 1. Please correct the following points in the statement. (1) On page 8, line 8, correct the phrase ``C is the escape part'' to ``C is the escape part.''<2>Wt, page 9, lines 16 to 17, [
The phrase "as shown in Figure 10" should be corrected to "used."that's all

Claims (3)

[Claims] (1) A flat rolling die C1 having a flat part extending in the longitudinal direction of the flat die formed in a part of the starting point of the f dimension of the biting part. A rolling errand die characterized in that, when the die is in the reversal state, the spacing between the opposing flat parts is J, which is a predetermined dimension smaller than the diameter of the object. (2) Book l jl' 11j part flat I■! 2. The rolled open flat die according to item 1, characterized in that one side of the die is roughened. (3) The first beat or ti characterized by forming a groove extending in the width direction of the flat die in the workpiece insertion part of the flat part.
The rolling open flat die described in No. 21J4.