JP6444780B2 - Circular saw waist insertion device and circular saw waist insertion method - Google Patents

Description

  The present invention relates to a circular saw insertion device that inserts into a circular saw and a circular saw insertion method using the device.

In cutting work of a metal body using a circular saw, the outer periphery provided with the cutting blade expands toward the outside of the circular saw due to the cutting heat of the rotating circular saw and the object to be cut (for example, a metal pipe). Since the inside of the saw does not expand, when the circular saw starts to rotate, distortion occurs due to the difference in expansion between the inside and outside of the circular saw, and the circular saw that rotates perpendicularly to the central axis shakes from side to side. Will occur.
If the circular saw rolls, it may break. In the circular saw, the outer peripheral portion with the blade expands outwardly during use due to high-speed rotation and frictional heat between the workpiece.
However, this expansion does not occur inside the circular saw. For this reason, when the circular saw starts to rotate, distortion due to the difference in expansion occurs between the inside and the outside of the circular saw, and so-called roll is generated in which the circular saw that rotates perpendicularly to the central axis sways from side to side.
In order to eliminate such problems, the outer surface of the circular saw was previously struck with a hammer or a press, or a circular streak-like waist was formed in the circular saw (waist insertion). work).
However, the waist-in operation is performed based on the experience and intuition of the operator, and is regarded as a problem when mass-producing circular saws.
In other words, in the waist insertion work using a hammer or a press, it is necessary to drive deeply because it is a point hitting the waist insertion portion intermittently. If the hammer is pressed deeply with a hammer or a press, the circular saw will have a deep dent, and a process of polishing the surface of the circular saw will be required after the waist insertion work, which will require more time for the waist insertion work. Furthermore, it is difficult to carry out the waist evenly.
In view of such a problem, the applicant of the present application first determines the contact angle between the circular saw and the spherical rolling roll by the distance from the center of the circular saw at the indented portion of the circular saw. The spherical rolling roll is rotated, the circular saw is rotated once, and then the spherical rolling roll is moved in the outer direction of the circular saw. Similarly, the contact angle between the circular saw and the spherical rolling roll is determined. Therefore, a circular saw roll-in roll device has been proposed in which this work is matched with the size of the circular saw and repeated a predetermined number of times (Patent Document 1).

JP 2014-4635 A

However, in the circular saw roll-in roll device of Patent Document 1, the shaft core of the rotary shaft of the circular saw mounting base is inserted and fixed in a mounting hole provided in the center of the circular saw, and the circular saw is rotated in a driven manner. When the saw is rolled, there is a problem that distortion occurs in the circular saw. In order to solve this problem, it has been necessary to input the thickness of the circular saw, the rolling ratio, etc. in advance by a computer, and to follow the movement of the circular saw installation base following the escape of the circular saw.
Therefore, in the present invention, there is provided a circular saw insertion device that simply inserts a circular saw into the circular saw without requiring a complicated mechanism such as control by a computer, and a circular saw insertion method using the device. The purpose is to do.

(1) The circular saw insertion device of the present invention includes a circular saw installation base 13 for installing a circular saw, and a pair of upper and lower spherical rolls 11 that are driven and rotated while sandwiching and pressing the circular saw from the front and back. The rotary saw swinging device is provided with a rotary table swinging shaft 13b whose rotation center is placed at a position away from the circular saw installation table 13, and the circular saw installation table 13 is centered on the rotary table swinging shaft 13b. It is made to be rotatable, and while the circular saw 1 is sandwiched by the spherical roll 11, it is driven and rotated by applying a pressing force, the circular saw is driven to rotate, and the circular saw 1 is rolled to follow the escape of the driven circular saw 1. Further, the circular saw installation base 13 is rotated about the rotary table swing shaft 13b.
(2) The circular saw insertion device of the present invention includes a circular saw installation base 13 for installing a circular saw, and a pair of upper and lower spherical rolls 11 that are driven and rotated while sandwiching and pressing the circular saw from both sides. In the circular saw insertion device, the diameter 13L of the mounting hole insertion ring 13a of the circular saw mounting base 13 is made smaller than the diameter 1L of the mounting hole 1a of the circular saw to be inserted, and the circular saw 11 is used as the circular saw. The circular saw 1 is rolled while being driven and rotated by applying a pressing force while sandwiching 1, and the circular saw 1 is rolled so that the mounting hole insertion ring 13 a does not interfere with the mounting hole 1 a of the driven circular saw 1. It is characterized by that.
(3) The circular saw insertion method of the present invention is a method of inserting a circular saw with a pair of upper and lower spherical rolls 11 that are driven and rotated while holding and pressing the circular saw from the front and back. A circular saw mounting table 13 and a pair of upper and lower spherical rolls 11 that are driven and rotated while sandwiching and pressing the circular saw from the front and back, and the rotation center is placed at a position away from the circular saw mounting table 13. A neck swinging shaft 13b is provided, and the circular saw mounting base 13 is rotatable about the rotary head swinging shaft 13b. The circular saw 11 is driven and rotated by applying a pressing force while the circular saw 1 is held between the circular rolls 11. The circular saw is rolled and the circular saw is rolled, and the circular saw installation base 13 is rotated about the rotary head swing shaft 13b so as to follow the escape of the driven circular saw. To do.
(4) The circular saw insertion method of the present invention is a method of inserting a circular saw with a pair of upper and lower spherical rolls that are driven and rotated while pinching and pressing the circular saw from the front and back. A circular saw mounting base 13 and a pair of upper and lower spherical rolls 11 that are driven and rotated while sandwiching and pressing the circular saw from the front and back, and the diameter 13L of the mounting hole insertion ring 13a of the circular saw mounting base 13 is inserted. The circular saw 1 is made smaller than the diameter 1L of the mounting hole 1a of the circular saw, and the circular saw 1 is sandwiched by the spherical roll 11 so that the circular saw 1 is driven and rotated while the circular saw 1 is driven and rotated. The mounting hole insertion ring 13a is configured not to interfere with the mounting hole 1a of the circular saw 1 that is driven to rotate.

The circular saw swivel device of the present invention is provided with a rotary table swing shaft 13b whose center of rotation is located away from the circular saw installation table 13, and the circular saw installation table 13 is centered on the rotation table swing shaft 13b. The rotary saw is driven and rotated by applying a pressing force while holding the circular saw 1 with the spherical roll 11 so that the circular saw is driven to rotate and the circular saw is rolled to follow the escape of the driven circular saw. The circular saw installation table 13 was rotated about the rotary table swing shaft 13b.
Further, the diameter 13L of the mounting hole insertion ring 13a of the circular saw mounting base 13 is made smaller than the diameter 1L of the mounting hole 1a of the circular saw to be inserted, and a pressing force is applied while holding the circular saw 1 with the spherical roll 11. Then, the circular saw was driven and rotated, and the circular saw 1 was rolled so that the mounting hole insertion ring 13a did not interfere with the mounting hole 1a of the circular saw 1 that was driven to rotate.
With the above configuration, there is an effect that distortion does not occur in the circular saw waisting operation. Furthermore, it is not necessary to control the movement of the circular saw mounting table in the circular saw waisting operation by a computer or the like, which can contribute to reduction of the production cost of the apparatus and improvement of durability.

1 is a schematic front view showing a circular saw insertion device 10 of Embodiment 1. FIG. 1 is a schematic side view showing a circular saw insertion device 10 of Embodiment 1. FIG. FIG. 3 is a schematic side view showing a mechanism for changing the angle of the spherical roll according to the first embodiment. FIG. 6 is a plan view showing a state in which a rotary table swinging shaft 13b is provided to perform a waist insertion operation in the circular saw waist insertion device of the first embodiment. It is explanatory drawing which shows a mode that the thickness of the circular saw 1 is reduced from thickness t1 before rolling to t2 by a spherical surface roll. In the circular saw insertion device of the second embodiment, the diameter 13L of the mounting hole insertion ring 13a of the circular saw installation base 13 is made smaller than the diameter 1L of the mounting hole 1a of the circular saw to be inserted, and the waist insertion operation is performed. FIG.

(Embodiment 1)
<Description of the entire device>
Hereinafter, a circular saw insertion device according to an embodiment of the present invention will be described. FIG. 1 is a schematic front view showing a circular saw insertion device 10 according to the first embodiment. FIG. 2 is a schematic side view showing the circular saw insertion device 10 according to the first embodiment.
As shown in FIGS. 1 and 2, a circular saw waisting device 10 includes a pair of upper and lower spherical rolls 11 for rolling the circular saw 1 from both front and back surfaces, and a pair of upper and lower spherical rolls for holding the spherical rolls 11 at both end surfaces. A holding part 12 and a circular saw installation base 13 for installing the circular saw are provided.

<Spherical roll 11>
The upper and lower spherical rolls 11 are held with their center axes fixed to bearings in the upper spherical roll holding part 12a and the lower spherical roll holding part 12b, respectively, and fixed to the upper frame 15a and the lower frame 15b, respectively. Has been.

  Here, the spherical roll 11 means a roll having a curved surface area of a three-dimensional surface obtained by cutting a rotating body that has rotated an arc at right angles to the central axis 21 at two points having different cross-sectional areas. That is, the spherical surface is defined as a set of points at a fixed distance from one fixed point, and the spherical roll 11 has a side surface consisting of a set of points at a fixed distance from one fixed point as a contact surface with the circular saw 1. It prescribes. In a circular saw waisting operation, the circular saw is rolled by being driven and driven by applying a large pressing force to both the front and back surfaces of the circular saw 1 with a spherical roll that is driven and rotated using a part of a complete sphere.

<Pressing rotation handle>
As shown in FIG. 1, the upper frame 15a and the lower frame 15b are configured such that the right side of the upper frame 15a moves up and down around a frame rotation fulcrum 15c (left side in the drawing) that connects them.
This makes it possible to adjust the rolling amount when the thickness of the circular saw is different or when the waist is placed.
The up and down movement of the upper frame 15a can be performed on the lower frame 15b fixed to the base 15d through the bevel gear 16a and the screw 16b by rotating the upper frame lifting and lowering handle 16.
By the vertical movement of the upper frame 15a, the upper spherical roll 11a fixed to the upper frame 15a also moves up and down, and the pressing force to the circular saw sandwiched between the upper spherical roll 11a and the lower spherical roll 11b can be changed.

<Manual pressure lever 17 for fine pressure adjustment>
Further, a pressing lever 17 is provided above the upper frame elevating rotation handle 16, and the lower end of the screw 17b connected to the pressing lever 17 is rotated by rotating the pressing lever 17 forward or opposite to the upper end of the screw 16b. By pressing or separating the frame, the vertical movement of the upper frame 15a can be finely adjusted.
As a result, it is possible to finely adjust the pressure applied to the circular saw sandwiched between the upper spherical roll 11a and the lower spherical roll 11b.

<Movement of the circular saw installation base 13 in the front-rear direction>
FIG. 3 is a schematic side view showing a mechanism for changing the angle of the spherical roll according to the first embodiment. As shown in the figure, the circular saw installation base 13 can be moved in the linear direction by rotating the installation base moving rotary handle 31.

<Circular saw installation base 13>
The shaft core 13 d of the circular saw installation base 13 is inserted into the mounting hole 1 a of the circular saw 1, and the circular saw 1 is installed on the circular saw installation base 13. That is, a circular saw installation base 13 for installing a circular saw and a pair of upper and lower spherical rolls 11 that are driven and rotated while sandwiching and pressing the circular saw from its front and back, and a mounting hole insertion ring of the circular saw installation base 13 are provided. The diameter of 13a is made smaller than the diameter of the mounting hole 1a of the circular saw to be inserted, and the circular saw 1 is clamped by the spherical roll 11 to be driven and rotated to give a circular motion to the circular saw. When rolling the circular saw 1 by rotating, the movement of the driven circular saw 1 is not restricted.

  The spherical roll angle changing cams 32a and 32b are also moved in the same direction so that the circular saw mounting base 13 is interlocked with the movement in the linear direction. The cams of the spherical roll angle changing cams 32a and 32b are also provided. Through the vertical movement of the contact rolls 33a and 33b in contact with the surfaces 32c and 32d, the angle θa of the upper central axis 14a and the angle θb of the lower central axis 14b of the upper spherical roll 11a and the lower spherical roll 11b with respect to the horizontal plane Can be changed.

  As a result, when the installation table moving rotary handle 31 is turned to move the circular saw installation table 13 in the linear direction, the angles θa and θb of the central axis of the spherical roll are also changed. That is, when the circular saw mounting base 13 is brought closer to the spherical roll direction, the angles θa and θb of the central axis of the spherical roll come up (θ approaches 90 degrees), and the portion close to the central part of the circular saw 1 is rolled. can do.

<Spherical roll angle change>
The change of the rolling part in the diameter direction of the circular saw 1 can be performed by changing the angle of the central axis 13 a of the spherical roll 11. That is, as shown in FIG. 3, the installation table moving rotary handle 31 is rotated, the roll angle setting table 32 is moved left and right (arrow 32 f), and the roller 33 biased to the roll angle setting table 32 is moved up and down. When moved in the direction, the angle of the first angle changing rod 34 interlocked with the vertical movement of the roller 33 can be changed as shown by an arrow 34a.
This makes it possible to change the angle θ of the central axis 14b of the lower spherical roll 11b integrated with the first angle changing rod 34 and the second angle changing rod 35 that is linked via the gear 34a and the gear 35a.
The rotation of the installation table moving rotary handle 31 is synchronized via the connecting bar 31a so that the angle θ of the central axis 14a of the upper spherical roll 11a can be changed.

The rotation of the installation table moving rotary handle 31 is also linked to the movement of the circular saw installation table 13 in the front-rear direction. That is, in FIG. 2, the circular saw 1 is installed on the circular saw installation table 13 so as to be rotatable, and the roll angle setting table 32 is linked with the movement of the circular saw installation table 13 in the rear (right direction in FIG. 2). Move to the right (arrow 32f is to the right).
Accordingly, the roller 33 biased to the roll angle setting base 32 lowers the contact roll 33b that is in contact with the cam surface 32d and interlocks with the first angle changing rod 34 through the gear 34a and the gear 35a. The angle θb of the central axis 14b of the lower spherical roll 11b integrated with the second angle changing rod 35 is changed so as to increase. Thereby, the part near the center of the circular saw 1 is rolled.

<Rotary table swing shaft 13b>
FIG. 4 is a plan view showing a state in which the rotary table swing shaft 13b is provided to perform the hip insertion work. As shown in FIG. 4, a rotary base swing shaft 13 b that places the center of rotation at a position away from the circular saw installation base 13 is provided, and the shaft core 13 d of the circular saw installation base 13 inserted through the mounting hole 1 a of the circular saw is provided. The rotary table swing shaft 13b is rotatable. In FIG. 4, the arm 13c that connects the rotary table swing shaft 13b and the circular saw installation table 13 swings in the direction of the arrow 13e around the rotary table swing shaft 13b.
As a result, while holding the circular saw 1 between the spherical rolls 11, a driving force is applied to rotate the circular saw, the circular saw is driven to rotate, and the circular saw 1 is rolled to follow the escape of the driven circular saw. The circular saw installation table 13 is rotated about the rotary table swing shaft 13b.

<Explanation of waist insertion work>
Next, a waist insertion operation performed using the circular saw waist insertion device of Embodiment 1 will be described. First, a circular saw is installed on the circular saw installation table 13, the installation table moving rotary handle 31 is turned, the tip of the central axis 14 of the spherical roll 11 is moved up and down, and a part of the spherical surface of the spherical roll 11 is circular sawed. Touch the area where you want to put your waist. The spherical roll 11 is driven to rotate, and the upper frame lifting / lowering rotation handle 16 is rotated by the rolling dimension to lower the spherical roll 11. Then, the circular saw 1 is driven to rotate by the spherical roll 11 that is driven to rotate, and is rolled (waisting operation is started).
That is, the spherical roll 11 is driven and rotated while being pressed by pressing the circular saw 1 from the front and back, and the circular saw 1 is driven to rotate and rolled.

At this time, as shown in FIG. 4, the shaft core 13 d of the circular saw mounting base 13 on which the circular saw 1 is initially installed is connected to the axis S <b> 2 of the central axis 14 of the spherical roll 11 fixed to the spherical roll holder 32. The circular saw 1 that is at the position S1 that is out of rotation but rotates following the rolling of the spherical roll 11 escapes in the direction of the arrow 1b. In other words, the traveling direction of the driven circular saw 1 is the F direction, but the traveling direction of the spherical roll 11 that is driven to rotate is the L direction.
Due to the difference in the traveling direction, an angle difference S3 between the circular saw traveling direction and the spherical roll traveling direction is generated. As a result, a force (in the direction of arrow 1b) that pushes the center 13d of the circular saw outward is generated, and the arm that connects the rotary table swing shaft 13b and the circular saw installation table 13 around the rotary table swing shaft 13b. 13c swings in the direction of arrow 13e.
Accordingly, the axis 13d of the circular saw mounting base 13 moves by a dimension S when viewed in a direction perpendicular to the axis S2 of the central axis 14 of the spherical roll 11, and approaches the axis S2 of the central axis 14 of the spherical roll 11. Will fit. When the circular saw 1 is rotated once, one arc-shaped rolling rebar 1b is formed inside the circular saw 1 in the diameter direction.

Further, as will be described with reference to FIG. 5, when the thickness of the circular saw 1 is reduced by the spherical roll 11 from the thickness t1 before rolling to t2, the force to escape to the circular saw 1 (arrow 1b) The center position of the circular saw 1 during rolling is shifted by the dimension S. The deviation S in the arrow 1b direction differs depending on the thickness t1 of the circular saw 1 before rolling, the thickness t2 after rolling, the rolling speed, and the like.
If the position of the circular saw 1 is fixed so as to eliminate the deviation S in the arrow 1b direction, the circular saw 1 is distorted during rolling. Therefore, it is preferable not to fix the center of the rotating circular saw 1 because distortion does not occur in the circular saw.

  When the formation of one rolling bar has been completed, the upper frame lifting and lowering rotation handle 16 is reversely rotated to release the pressing force of the spherical roll 11 to the circular saw 1 and the holding of the circular saw 1 is released. Then, the rotating handle 31 for moving the installation table is turned to move the spherical roll 11 in the outer peripheral direction of the diameter of the circular saw 1, and another part of the circular saw 1 is sandwiched again by the spherical roll 11, and the next rolling bar is moved. Do the hip work to form. In this way, it is repeated by the number of rolling lines (rolling bars) to be formed.

(Embodiment 2)
The circular saw insertion device according to Embodiment 2 includes a circular saw installation base 13 for installing a circular saw, and a pair of upper and lower spherical rolls 11 that are driven and rotated while sandwiching and pressing the circular saw from the front and back. In the point that the circular saw is inserted by a pair of upper and lower spherical rolls that are driven and rotated while sandwiching and pressing the saw from both sides, the circular saw is the same as the circular saw insertion device of the first embodiment. When the circular saw 1 is rolled by being driven to rotate, the difference is that the relationship between the mounting hole insertion ring of the circular saw installation base 13 and the mounting hole of the circular saw is defined.
That is, in the circular saw insertion device of the second embodiment, the diameter 13L of the mounting hole insertion ring 13a of the circular saw installation base 13 is smaller than the diameter 1L of the mounting hole 1a of the circular saw to be inserted, as shown in FIG. Then, the circular saw 1 is driven and rotated while holding the circular saw 1 with the spherical roll 11, the circular saw is driven to rotate, the circular saw 1 is rolled, and the mounting hole insertion ring 13 a is driven to rotate. So as not to interfere with the mounting hole 1a. With such a simple configuration, distortion is not generated in the circular saw swallowing operation.

  If the circular saw waist insertion device of the present invention is used, the circular saw can be easily inserted, and the industrial applicability is extremely high.

DESCRIPTION OF SYMBOLS 1 Circular saw 1a Circular-saw mounting hole 1b Rolling bar | burr 1L Diameter of circular-saw mounting hole 10 Circular saw insertion device 11 Spherical roll 11a Upper spherical roll 11b Lower spherical roll 12 Spherical roll holding part 12a Upper spherical roll holding part 12b Lower spherical roll holder 13 Circular saw installation base 13a Mounting hole insertion ring 13b of circular saw installation base 13 Rotating table swing shaft 13c Arm 13d Shaft core 13L of circular saw installation base 13 Diameter of mounting hole insertion ring θa Upper central axis 14a angle θb lower center axis 14b angle 14 center axis 14a upper spherical roll 11a central axis 14b lower spherical roll 11b central axis 15a upper frame 15b lower frame 15c frame rotation fulcrum 15d base 16 upper frame up-and-down rotation Handle 16a Bevel gear 16b Screw 17 Manual pressing lever 17b Screw 21 Center shaft 31 Rotating handle for installation base movement 31a Connecting bar 32 Spherical roll holders 32a, 32b Spherical roll angle change cams 32c, 32d Cam surfaces 33a, 33b of spherical roll angle change cams 32a, 32b Contact roll 33 Roller 34 biased to roll angle setting base 32 1 angle change rod 34a, 35a Gear 35 2nd angle change rod

Claims (4)

A circular saw mounting base for installing the circular saw;
A pair of upper and lower spherical rolls that drive and rotate while holding and pressing a circular saw from the front and back,
A circular saw waisting device equipped with
A rotary base swing shaft that places the center of rotation at a position away from the circular saw installation base is provided.
The circular saw mounting base can be rotated around the swivel head swing axis,
While holding the circular saw between the spherical rolls, press and rotate to drive and rotate the circular saw and roll the circular saw,
A circular saw swivel device characterized in that a circular saw installation base is rotated about a rotary table swinging shaft so as to follow the escape of a driven circular saw. A circular saw mounting base for installing the circular saw;
A pair of upper and lower spherical rolls that drive and rotate while holding and pressing a circular saw from the front and back,
A circular saw waisting device equipped with
The diameter of the mounting hole insertion ring of the circular saw mounting base is made smaller than the diameter of the mounting hole of the circular saw,
While holding the circular saw between the spherical rolls, press and rotate to drive and rotate the circular saw and roll the circular saw,
A circular saw swivel device characterized in that the mounting hole insertion ring does not interfere with the mounting hole of the driven circular saw. It is a method of inserting a circular saw with a pair of upper and lower spherical rolls that are driven and rotated while sandwiching and pressing the circular saw from its front and back,
A circular saw mounting base for installing the circular saw;
A pair of upper and lower spherical rolls that drive and rotate while holding and pressing a circular saw from the front and back,
With
A rotary base swing shaft that places the center of rotation at a position away from the circular saw installation base is provided.
The circular saw mounting base can be rotated around the swivel head swing axis,
While holding the circular saw between the spherical rolls, press and rotate to drive and rotate the circular saw and roll the circular saw,
A circular saw swivel method characterized in that a circular saw installation base is rotated about a rotary table swinging shaft so as to follow the escape of a driven circular saw. It is a method of inserting a circular saw with a pair of upper and lower spherical rolls that are driven and rotated while sandwiching and pressing the circular saw from its front and back,
A circular saw mounting base for installing the circular saw;
A pair of upper and lower spherical rolls that drive and rotate while holding and pressing a circular saw from the front and back,
With
The diameter of the mounting hole insertion ring of the circular saw installation base is made smaller than the diameter of the mounting hole of the circular saw,
While holding the circular saw between the spherical rolls, press and rotate to drive and rotate the circular saw and roll the circular saw,
A circular saw insertion method characterized in that the mounting hole insertion ring does not interfere with the mounting hole of the driven circular saw.