KR100719500B1 - Manufacturing method for bi-directional roll type dies of combined worm - Google Patents

Abstract

The present invention relates to a method for manufacturing a bidirectional roll-type die for rolling a worm combined with a left screw and a right screw, and more particularly, a first preparatory step of performing a keyway machining with a mounting hole of a left screw or a right-handed die; The second adjustment step of adjusting the pitch starting point of each die, so that the key is assembled by inserting the keyed left or right threaded dies together with the pitch-aligning block in the dedicated mandrel together with the master for threading. As a reference, the left screw die or right screw die manufactured by the third machining step of calculating the calculation to the outer surface of the left or right screw die is combined with a key directly on the rolling axis, so that the left screw die and To make a right-handed die into a combined die So as to separate its simplicity to manufacture a combined die without tightening process, as well as to increase the combination precision as in the prior art that there are features to maximize productivity, operability, as well as improved reliability.

Worm, screw, rolled, die, left-handed, right-handed, combination, calculation

Description

Manufacturing method for bi-directional roll type dies for roll processing of worms combined left and right screws {Manufacturing method for bi-directional Roll type dies of combined worm}

Figure 1 is a side view showing the main portion of the conventional die manufacturing process.

Figure 2 is a side view of the main part showing the rolling operation by the dice of Figure 1;

Figure 3 is a side view showing the main portion of the die manufacturing process of the present invention.

4 is an enlarged view of main parts of the present invention;

Figure 5 is a main portion side view showing the rolling work by the dice of the present invention.

** Description of symbols for the main parts of the drawing **

10: dedicated mandrel

13,14: dice

16: keyway

20,20 ': Master

30: Pitch Fit Block

100: round bar material

The present invention relates to a roll-type die manufacturing method for manufacturing a simple and precise combination of a bidirectional roll-type die for rolling a worm combined with a left and right screw.

In general, there are two methods for rolling worms on round bar materials using flat dies and roll dies.

In the method using the roll-shaped dice, an annular material is placed between two roll-shaped dies in which an uneven shape calculation is correspondingly formed, and then, by pressing the round-shaped material by rotating two dies, the die is formed on the die surface. The worm parts will be processed.

In particular, when rolling the worm combined with the left screw and the right screw on the rod-shaped material, the left screw and the right screw by the above-described method using a combination die that combines a plurality of dice for the left and right screw worm processing The combined worm will be processed.

However, the conventional method for manufacturing the combination die described above is fixed by inserting a plurality of left or right threaded dies (3, 3) (4, 4) in close contact with the general mandrel (2) as shown in FIG. It is fixed by the member 7.

In this state, the left or right hand thread calculation is performed on the outer surfaces of the dies 3 and 3 and 4 and 4, respectively.

At this time, the reference plane becomes dice 3 (4) located on one side.

In this way, when the calculation is completed on the dies 3, 3 and 4 and 4, the left screw die 3 and the right screw die 4 are tightly inserted on the general mandrel 2 again.

At this time, it is necessary to visually check and match the custom work of matching the starting point at which the calculation of the left screw die 3 and the right screw die 4 starts.

In this state, the fastening holes 3a and 4a are formed in the left screw die 3 and the right screw die 4, and the fastening bolts 5 are fastened to each other to fix the key groove 6 in the inner mounting hole. As a result, the production of the combined die is completed.

As shown in FIG. 2, the combined die manufactured as described above is fixedly installed since the key is coupled to the fixed side and the movable side rolling shaft 1.

By rotating the fixed side and movable side combination dies as described above, the worm 110 combined with the left and right screws is rolled on the rod-shaped material 100 as described above.

However, the conventional combination die manufacturing method described above has the following problems.

First, after calculating the calculation on the outer surface of the die and inserting it into a general mandrel, the combination of the left and right screw dies without any setting reference point is checked visually and fits with the naked eye. The fitting work is difficult, and such a fitting error causes a problem of lowering the precision of machining.

Second, after the combination of the left screw die and the right screw die to form a fastening hole to fasten and fasten with a fastening bolt, and also the key work for installing the combination die on the rolling mill shaft, the manufacturing process becomes complicated, productivity and work There was a problem that the deterioration.

The present invention was created to solve all the problems of the prior art described above, and manufactures a combined die in which a left and a right screw die are combined by a simple manufacturing process, as well as to increase the assembly precision, thereby improving productivity and workability. Of course, the purpose is to maximize reliability.

The purpose of this invention,

A first preparatory step of performing keyway machining with a mounting hole of a left-handed or right-handed die;

A second adjustment step of adjusting the pitch starting point of each die by inserting the key-processed left or right thread die together with a pitch-aligning block in a dedicated mandrel together with a master for threading;

This is achieved by directly combining the left or right screw die manufactured by the third processing step of machining the calculation to the outer surface of the left or right screw die on the basis of the master, by directly keying on the roll shaft. .

Hereinafter, a preferred embodiment for achieving the above object of the present invention will be described in detail with reference to the accompanying drawings.

That is, in the present invention, as shown in Figs. 3 to 5, in manufacturing a combined die in which a left screw die and a right screw die are combined with each other,

A first preparation step of processing the key groove 16 by the mounting holes 15 of the left or right threaded dies 13, 13 and 14, 14,

The keyed left or right screw dies 13, 13, and 14 and 14 are keyed together with a master mandrel 10 together with masters 20 and 20 'for left or right hand threading. The pitch adjusting block 30 is inserted between the masters 20 and 20 'and the left and right screw dies 13 and 13 and 14 and 14, respectively. A second adjustment step of adjusting the pitch start points of (14, 14) to be consistent;

The left or right screw manufactured by the third machining step of processing the calculation to the outer surfaces of the left or right screw dies 13, 13 and 14, 14 based on the masters 20, 20 '. The use dies 13 and 14 are keyed and combined directly on the precursor shaft 1.

As reference numeral 40 denotes a die holding member.

Next will be described the operation and action of the method of the present invention as described above.

In the manufacturing method of the present invention, the left or right screw dies 13, 13, and 14, 14 are set by the key groove 16, and the reference point is precisely pitched, as well as the left or right thread without a separate fastening process as in the prior art. Its feature is that the screw die can be used in combination on the rolling mill shaft.

In more detail,

First, the key groove 16 is machined into the mounting hole 15 of the left or right screw dies 13 and 13 and 14 and 14.

In this manner, the die is assembled to the dedicated mandrel 10 in a state where it is prepared.

The dedicated mandrel 10 first inserts the master 20 or 20 'for left or right threaded machining, and then inserts the left or right screw dies 13, 13 and 14 and 14 corresponding thereto. But the key is coupled to be fixed to the fixing member 40.

At this time, the pitch adjusting block 30 is inserted into and adjusted between the master 20 and 20 'and the dice, and between the dice and the dice.
The pitch matching block 30 maintains the interval as constant as the interval between the masters 20 and 20 'and the dice 13 and 14 to be processed so that the pitch starting point proceeds equally.

That is, the pitch processing starting points of the left or right threaded dies 13, 13 and 14, 14 are assembled to the predetermined positions with respect to the master 20, 20 'as a reference plane.

In this state, calculation processing is performed on the outer surfaces of the left and right screw dies 13, 13, and 14 and 14 based on the masters 20 and 20 '.

In this way, when the calculation of the left or right screw dies 13, 13 and 14 and 14 is completed, the combined dies are formed by combining the left or right screw dies 13, 13 and 14 and 14, respectively. It will be prepared.

This simply combines the left and right threaded dies 13 and 14 on the fixed and movable rolled shafts 1 so that the pitch starting point of the dies can be easily matched. .

That is, as shown in the related art, the process of visually checking and aligning the pitch starting points of the left and right threaded dies 13 and 14 with each other, as well as the process of forming a fastening hole in the dies and mutually assembling them is excluded. .

At this time, the left or right screw dies 13, 13 and 14, 14 are finely shifted from the pitch starting point due to the use error of the pitch alignment block 30. As shown in the figure, the value of L1 = L2 is checked, and the error amount is simply removed from the flat grinding machine.

In addition, by applying the above-described method of the present invention, it is possible to variously control the dimensional values aimed at the dies, as well as to easily correct the dimensional values and to obtain a wide range of dies.

In this way, when assembly is completed by combining the dies 13, 13, 14, 14 on the fixed side and the movable side rolling shaft 1, the rod-shaped material ( 100) is to roll the worm (110) combined with the left and right screws.

As described above, since the manufacturing method of the present invention calculates and combines the left screw die and the right screw die in a state where the key is coupled to the dedicated mandrel, the combination is commercially available without a separate fastening process, thus providing a simple manufacturing process. Of course, the pitch starting point can be consistently and accurately matched to increase the assembly precision, thereby maximizing productivity and workability.

Claims (1)

In manufacturing a combined die in which left and right die dice are combined with each other, A first preparation step of processing the key groove 16 by the mounting holes 15 of the left or right threaded dies 13, 13 and 14, 14, The keyed left or right screw dies 13, 13, and 14 and 14 are keyed together with a master mandrel 10 together with masters 20 and 20 'for left or right hand threading. The pitch adjusting block 30 is inserted between the masters 20 and 20 'and the left and right screw dies 13 and 13 and 14 and 14, respectively. A second adjustment step of adjusting the pitch start points of (14, 14) to be consistent; The left or right screw manufactured by the third machining step of processing the calculation to the outer surfaces of the left or right screw dies 13, 13 and 14, 14 based on the masters 20, 20 '. A method for manufacturing a bi-directional roll die for rolling worms combined with left and right screws, characterized in that the use dies (13) and (14) are directly keyed onto the roll shaft (1).

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