JP4472071B2 - Drawing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drawing apparatus for drawing a pipe or a disk-shaped material.
[0002]
[Prior art]
In a conventional drawing apparatus for drawing a cylindrical member such as a pipe tip, for example, a drawing tool is supported on a tool mounting base attached to a rotating spindle tip so as to be slidable in the radial direction, thereby drawing. The method is adopted.
In this case, as a means for moving the tool in the radial direction, the tool mounting base is provided with a cam plate for moving the tool in the radial direction, the mounting base is attached to the tip of the main shaft, and the cam plate is a cam shaft for inserting the main shaft. attached to the distal end, the cam shaft differential gear mechanism from the spindle (e.g., JP Kokoku 3 over 8412), or by using the interlocking means such as flexible meshing type drive transmission device (e.g. Japanese Patent Application 10 over No. 09777) Thus, means for driving the camshaft by appropriately changing the rotation amount of the main shaft is employed.
[0003]
[Problems to be solved by the invention]
In the above configuration, for example, the plurality of squeezing rollers attached to the tool mounting base are advanced and retracted synchronously by the cam plate. However, in the drawing process, there are cases where unnecessary portions need to be cut thereafter. For this purpose, a method is generally employed in which a cutting tool is attached to a separate tool mounting base, and the mounting base is advanced and retracted.
However, in this system, it is necessary to operate the cutting tool together with the interlocking means, and there is a problem that not only the structure is complicated, but also the operation requires time.
In view of this point, the present invention places a cutting tool together with a drawing tool on the tool mounting base, and selects and advances each tool by rotating one cam plate to simplify the operation. The purpose is to measure.
[0004]
[Means for Solving the Problems]
According to a first aspect of the present invention for achieving the above object, there is provided a tool mounting base for supporting a machining tool slidably in a radial direction at a spindle end, and the tool at a camshaft tip inserted concentrically with the spindle. In the drawing apparatus, the cam shaft is operated in association with the rotation of the main shaft, and the tool mounting base and the cam plate are provided with two sets of processing tools, and one of the processing tools Is provided with a retrograde mechanism for shifting in the direction opposite to the direction of movement of the other machining tool .
[0005]
In the present invention configured as described above, the tool mounting base is provided with two sets of machining tools, and one of the machining tools has a retrograde mechanism, so that one of the machining tools advances inward. When the other machining tool is moved to the outward retracted position, the two machining tools can be moved in opposite directions by operating one cam plate.
[0006]
The second invention, the guide grooves formed on the cam plate, during forward inward of one of the processing tool, to hold the other machining tool to the retracted position of the outer, the inner and outer side And a concentric circle portion that holds the retracted position outside.
[0007]
The present invention having the structure described above, during forward inward of one of the processing tool, the other of the processing tool is held in the retracted position of the outer. The reverse is also done. These are selected and performed by rotating the cam plate.
[0008]
The third invention is characterized in that the pressurized Engineering tool, and constituted by two sets of working tools with the drawing tool cutting tool.
[0009]
The present invention having the above-described configuration can continuously perform drawing and subsequent cutting by forward and reverse rotation of the cam plate.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on embodiments shown in the drawings. In the drawing, a drawing apparatus 1 includes a hollow main shaft 2, a tool mount 3 attached to the tip of the main shaft, a cam shaft 4 fitted into the main shaft 2, and a cam plate attached to the tip of the cam shaft 4. 5. D represents a mandrel for supporting a pipe to be processed.
[0011]
The main shaft is connected to an appropriate drive motor M, supported on the housing 6 via a bearing 7, the cam shaft 4 is supported on the main shaft 2 via a bearing 8, and the main shaft 2 is connected to an appropriate speed change mechanism 10, For example, it is interlocked via a flexure meshing type drive transmission device. An outline of the flexibly meshing drive transmission device 10 is shown in FIGS.
[0012]
In the figure, the drive transmission device 10 meshes with outer rings 11 and 12 respectively engaged with the main shaft 2 and the cam shaft 4 and tooth grooves formed on the inner surfaces of the outer rings (both have the same number of teeth). And a flexible tooth wheel 13 having different tooth shapes (usually two fewer), and the tooth wheel 13 is supported in an oval shape so as to be rotatable, and is relative to the tooth groove of the outer ring. And a wave forming wheel 14 meshed at two locations. Reference numeral 15 denotes a wave wheel driving motor.
[0013]
In the above configuration, when the wave forming wheel 14 is fixed and one outer ring 11 is driven, the tooth wheel 13 is also rotated, and the other outer ring 12 is also rotated at the same rotational speed. Next, when the outer ring 11 is fixed and the wave forming wheel 14 is rotated, the tooth wheel 12 has a difference in the number of teeth from the outer ring 11, and the other outer ring 12 is thereby rotated.
[0014]
Therefore, the relative speed of the other outer ring 12 changes with respect to the outer ring 11 by rotating the wave forming wheel 14 while rotating the outer ring 11. The variation rotational speed varies in proportion to the rotational speed of the forward and reverse directions of the wave forming wheel 14, thereby holding the cam plate 5 at the same rotational speed and the tool mount 3, or is rotated to increase or decrease.
[0015]
The tool mount 3 is attached to the main shaft 2 via a mounting flange 20, and forms guide grooves 23 and 24 for guiding the support members 21 and 22 of the tools R1 and R2 in the radial direction. However, in the illustrated example, the tool R1 indicates a squeeze roller, and R2 indicates a cutting roller.
In addition, the illustrated example shows an example in which two each are provided, which are R1a, R1b, R2a, and R2b, respectively. Reference numerals 21a, 21b and 22a, 22b denote respective support members (hereinafter collectively referred to as 21, 22).
[0016]
The cam plate 5 is formed with two spiral cam grooves 30 and 31 for guiding the tool in the radial direction by rotation. As shown in FIG. 3, each cam groove is approximately 270 degrees, and when the entire circumference is equally divided into four angles α, β, γ, δ, the angles β, δ are concentric circles, that is, one cam. The groove is a small diameter portion, the other is a large diameter portion, and the angle α and γ portions are variable diameter portions, and the guide rollers 35a, 35b and 36a, 36b fitted in the cam grooves 30, 31 are inserted into the tool support members 21, 22. (Hereinafter collectively referred to as 35 and 36).
[0017]
Any one of the tool support members 21, 22, for example, 22 includes a retrograde mechanism 40. The retrograde mechanism 40, the guide rollers inwards by the cam grooves 30 and 31, when or migrating outwardly, the outwardly also reverse the tool obtained by such moves inwardly, an example of which It shows in FIG. 9 thru | or FIG. In the figure, the reverse mechanism 40 includes a tool (cutting roller R2 in the illustrated example) support base 41, a lower transition member 42 supported on the support base so as to be slidable in the radial direction, and a reverse gear member 43. The support base 41 moves along the guide groove 24 of the tool mounting base 3, and the reverse gear member 43 engages with a rack 44 formed on one side of the lower transition member 42, and an intermediate gear 46 meshes with this gear. The intermediate gear includes a drive gear 48 attached to the same shaft 47 and a rack 49 formed on one side of the support base 41 so as to mesh with the gear 48.
[0018]
Thereby, when the guide roller 36 moves in the radial direction along the cam groove with the lower transition member 42, the support base 41 is moved in the opposite direction.
[0019]
In the above configuration, when each of the guide rollers 35 and 36 is located at the position shown in FIG. 3, that is, at the boundary between the concentric circular portion and the diameter-changing portion of the cam grooves 30 and 31, the drawing tool R1 is in the outward retracted position. The cutting tool R2 is similarly positioned at the outward retracted position by the retrograde mechanism 40. In this state, when the cam plate 5 is rotated in the arrow Y direction (left direction), the guide rollers 35a and 35b of the drawing tool move inward, that is, in the drawing direction. In this case, the cutting processing guide rollers 36a and 36b are held concentrically, that is, held in the retracted position.
[0020]
On the other hand, when rotating in the right direction, the drawing guide roller 35 is located on the outer concentric circle, that is, in the retracted position, and the guide roller 36 of the cutting tool R2 moves outward, but the reverse rotation mechanism 40. Accordingly, the cutting tool R2 moves in the direction of the inner machining position.
[0021]
Accordingly, the mandrel D is inserted into the work pipe held by an appropriate support mechanism (not shown), the main shaft is rotated, the drawing device 1 is advanced, the drawing tool R1 is advanced to a predetermined position, and then the speed is changed. By rotating the cam plate 5 by driving the motor 15 of the mechanism 10, the drawing process and the unnecessary part cutting process are performed as described above.
[0022]
【The invention's effect】
As described above, according to the present invention, a tool mounting base is provided at the tip of the main shaft, and a cam plate for moving the tool in the radial direction is provided at the tip of the cam shaft concentric with the main shaft. In the drawing apparatus, the tool mounting base and the cam plate are provided with two sets of machining tools, and one of the machining tools is provided with a reverse mechanism for shifting in the direction opposite to the direction of movement of the other machining tool. since the other retreat of machining tools in accordance with the rotation of the cam plate is adapted to shift to the opposite direction, to migrate to one, respectively Re its two sets of working tools in the cam plate opposite directions it can.
Also when the second aspect of the invention, the cam plate during forward inward of one of the processing tool and the other machining tool to hold the retracted position of the outer guide groove inwardly By forming the transition part and the concentric part of the rotation held at the retracted position, the processing can be performed reliably.
Also when according to a third invention, the pressurized Engineering tool, by constructing two sets of working tools of the drawing tool cutting tool, and drawing, excess formed by restrictor processing The cutting of the portion can be performed continuously by forward and reverse rotation of the cam plate.
[Brief description of the drawings]
FIG. 1 is an overall longitudinal sectional view of a drawing apparatus of the present invention along the line P-P in FIG.
FIG. 2 is a front view of a tool mounting base.
FIG. 3 is a front view of a cam plate.
4 is a cross-sectional view of FIG. 3. FIG.
5 is a longitudinal sectional view of the speed change mechanism along the Q over Q line in Fig.
6 is a longitudinal sectional view taken along line RR in FIG.
FIG. 7 is a perspective view of a transmission mechanism.
FIG. 8 is a cross-sectional view taken along the line TT in FIG.
9 is a cross-sectional view taken along the line U-U in FIG.
10 is a cross-sectional view taken along line VV in FIG. 2. FIG.
FIG. 11 is an operation explanatory diagram of a retrograde mechanism.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Drawing apparatus 2 Spindle 3 Tool mounting stand 4 Cam shaft 5 Cam plate 40 Reverse mechanism

Claims (3)

A tool mounting base for supporting a machining tool at a tip end of the main shaft so as to be slidable in a radial direction; and a cam plate for moving the tool in the radial direction at a tip end of the cam shaft that is fitted and concentrically with the main shaft. Is a drawing device that operates in conjunction with the rotation of the spindle, wherein the tool mounting base and the cam plate are provided with two sets of processing tools, and one of the processing tools has a direction opposite to the transition direction of the other processing tool. A drawing apparatus comprising a retrograde mechanism for shifting . Guide grooves formed in the cam plate during forward inward of one of the processing tool, to hold the other machining tool to the retracted position of the outer, and transition into and out laterally, with outward 2. The drawing apparatus according to claim 1, further comprising a concentric circular portion that holds the retracted position. 3. The drawing apparatus according to claim 1 , wherein the machining tool is composed of two sets of machining tools , ie , a drawing tool and a cutting tool.

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