JP2015123480A - Screw blade manufacturing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screw blade manufacturing device with a device structure simpler than conventional manufacturing devices, capable of manufacturing a screw blade having a highly accurate pitch, using steel material stronger and wider in thickness than steel material used in the conventional devices.SOLUTION: A screw blade manufacturing device 1 includes: a frame 11; a pair of rails 12, 13; a shaft 14 for the winding; a first drive part 15 for rotating the shaft 14 for the winding; a flange part 16 for rotating, with the rotation of the shaft 14 for the winding; a fixing part 161 installed at the flange part 16; a drive screw 21 disposed parallel to the pair of rails 12, 13; a second drive part 22 for rotating the drive screw 21; a moving bed 30 having, at a lower part, bolts 23, 24 screwed with the drive screw 21; a bending metal fitting 31 for placing steel material S at an angle of α to the shaft 14 for the winding; a winding bearing 32 for the bed, into which the shaft 14 for the winding is inserted; and a control part for controlling rotational speed of the shaft 14 for the winding and speed of movement of the moving bed 30.

Description

  The present invention relates to a screw blade manufacturing apparatus for manufacturing a screw blade (for example, a screw blade for an axisless screw conveyor).

  A conventionally known manufacturing apparatus includes a cylindrical support (3) that rotates in the axial direction, and a guide (8) that engages with the bar body (7), and a moving device that moves in the axial direction of the support (3) ( 16), the bar end (7a) is fixed to one end of the support (3) with a screw, and the bar (7) is moved by moving the moving device (16) while rotating the support (3). A screw is manufactured by spirally winding around the support (3) (see Patent Document 1). In this apparatus, it is described that the screw pitch can be changed by changing the angle α of the guide (8) and (the angle with respect to the support (3) axis).

  The manufacturing apparatus of Patent Document 1 includes a moving table (12), and the moving table (12) travels on wheels along two parallel and horizontal guides (13). The movable table (12) is connected to an endless track screw (14) driven by an electric motor (15) via a single nut.

Special table 2001-526116

  In the apparatus of Patent Document 1, a steel plate (for example, hot rolled steel SS400 having a thickness of 4 to 8 mm and a width of 30 to 50 mm) is processed to produce a screw blade. However, the screw blades having the strength of SS400, the above thickness, and the width dimension, were severely worn depending on the transported material (for example, hard materials such as iron ore and gravel), and the blades were bent or bent.

  Commercially available steel materials are generally 6 m long and 2 m wide. Depending on the width of the screw blades (for example, 30 mm), the steel material is cut parallel to the vertical direction and processed into a raw material having a length of 6 m and a width of 30 mm, and then the screw blades are processed. The larger the outer diameter of the screw blade, the shorter the axial length of the screw blade (because it is 6 m in a straight line, it becomes shorter due to screw processing). In order to obtain a screw blade having a desired axial length (for example, 8 m or more), it is necessary to joint the screw blade (welding the tip portions). However, since the pitch of the screw blades is not stable even when the screw blades having the strength, thickness and width of the steel material SS400 are spliced, there is a limit to the number that can be spliced. Met.

  Moreover, since the diameter of a screw is determined by the outer diameter of a cylindrical support (3), the apparatus of patent document 1 prepares multiple support (3) from which a diameter differs, and supports (3) by a desired outer diameter. Had to be replaced.

  Therefore, the present invention has been made in view of the above circumstances, and its purpose is to use a steel material that has a simpler device structure than a conventional production device, and has a higher strength and thickness width than in the past, An object of the present invention is to provide a screw blade manufacturing apparatus for manufacturing screw blades of high precision pitch.

A screw blade manufacturing device according to the present invention is a screw blade manufacturing device for manufacturing an axisless screw blade from a steel material,
Frame,
A pair of rails fixed to the frame;
A winding shaft disposed above the pair of rails and parallel to the pair of rails;
A first drive unit for rotating the winding shaft;
A flange portion that rotates according to the rotation of the winding shaft;
A fixing portion installed on the flange portion and fixing one end of the steel material;
A drive screw having a two-thread structure disposed between the pair of rails and parallel to the pair of rails;
A second drive unit for rotating the drive screw;
A movable bed that is movably mounted on the pair of rails and includes a bolt that is screwed into the drive screw at the bottom;
A bending fitting provided on the moving bed and mounting the steel material at an angle α with respect to the winding shaft;
A bed winding bearing provided on the moving bed and into which the winding shaft is inserted; and
A control unit that controls the rotational speed of the flange unit by controlling the first driving unit and controls the moving speed of the movable bed by controlling the second driving unit. To do.

  According to this configuration, the moving bed can be stably and highly accurately moved by the drive screw having the double thread structure, and the steel material having higher strength and thickness and width than the conventional one can be used with high accuracy. Pitch screw blades can be manufactured.

  Examples of the “steel” used as the raw material of the screw blade of the present invention include, for example, general structural rolled steel (SS330, SS400, SS490, SS540, etc.), cold rolled steel plate (SPCC, SPCD, SPCE, SPCF, SPCG, etc.), Carbon steel materials (S25C, S30C, S35C, S45C, S50C, S55C, etc.), hot or cold rolled stainless steel plates (SUS304, SUS316, SUS430, SUS410, etc.), wear-resistant steel plates (HARDOX (registered by Sweden Steel)) Trademark)), JFE Steel's Everhard (EVERHARD (registered trademark), etc.), high strength steel plates (SM570, SMA570W, etc.), TMCP type high strength steel plates (SM570TMC, SMA570WTMC, etc.).

  The thickness of the steel material is, for example, 10 mm to 50 mm, preferably 15 mm to 50 mm, and the width of the steel material is, for example, 30 mm to 80 mm, preferably 40 mm to 80 mm. Even if the thickness of the conventional screw blade raw material (SS400) is larger than the thickness of 4 to 8 mm and the width of 30 to 50 mm, the screw blade can be manufactured with the apparatus of the present invention.

  The shape of the steel material is, for example, rectangular (rectangular, square), circular, polygonal, irregular, or the like in cross section, but the screw blade is preferably rectangular.

  As one embodiment of the present invention, the bolts are provided at two lower portions of the movable bed.

  According to this configuration, the moving bed can be moved more stably and with high accuracy by providing bolts that are screwed to the drive screw having a double thread structure, and has higher strength than the conventional one. In addition, a high precision pitch screw blade can be manufactured using a steel material having a thickness and width.

  As one embodiment of the present invention, a sliding portion made of a malleable metal material is provided at a location of the moving bed that contacts the pair of rails.

  According to this configuration, since the sliding portion is interposed between the rail and the moving bed, the frictional force generated between these members can be reduced, and the moving bed on the rail can be moved smoothly.

  As an embodiment of the present invention, a sliding portion made of a metal material having a malleability is provided on the inner surface of the bed winding bearing in contact with the winding shaft.

  According to this configuration, the frictional force generated between the winding shaft and the bed winding bearing can be reduced by providing the sliding portion on the inner surface of the bed winding bearing. The load on the moving bed can be reduced.

  Examples of the “metal material having malleability” include gold, silver, lead, copper, aluminum, tin, platinum, zinc, iron, or nickel, and two or more synthetic metals (for example, brass). As the sliding portion, a metal material having a predetermined strength and spreadability is preferable. For example, brass is preferable.

  As one embodiment of the present invention, a winding bearing for supporting the winding shaft is further provided at the other end different from the first drive unit.

  As an embodiment of the present invention, the inner surface of the winding bearing that comes into contact with the winding shaft is provided with a sliding portion made of a metal material having extensibility.

  According to this configuration, by providing the sliding portion on the inner surface of the winding bearing, the frictional force generated between the winding shaft and the winding bearing can be reduced, and the winding shaft can be made smooth. Can be rotated.

  As one Embodiment of this invention, the said bending metal fitting is comprised so that height adjustment is possible.

  According to this configuration, screw blades having different outer diameters can be easily manufactured by arbitrarily changing the height position of the bending fitting without changing other members. By configuring the base material of the bending metal in a plurality of stages, the height position can be arbitrarily adjusted.

  As one Embodiment of this invention, the said bending metal fitting is comprised so that adjustment of the said angle (alpha) is possible.

  According to this configuration, screw blades having different pitches can be easily manufactured by changing the angle α. Moreover, it is preferable to change the angle α corresponding to the outer diameter.

  As one Embodiment of this invention, it is preferable that the said bending metal fitting is arrange | positioned under the said winding axis | shaft.

  According to this structure, since it exists below the rotating shaft of the winding shaft, the steel material can be stably fed, and the dimensional stability of the outer diameter and the pitch is increased.

It is a side schematic diagram of a screw blade production device. It is the figure which looked at the screw blade manufacturing apparatus from one direction of the winding shaft. It is a figure for demonstrating the drive screw of 2 thread structure, and the nut for 2 threads. It is a figure for demonstrating a sliding part. It is a figure which shows the state which set the steel material to the bending metal fitting and the fixing | fixed part.

  The screw blade manufacturing apparatus of the present embodiment will be described with reference to the drawings. The screw blade manufacturing apparatus 1 includes a frame 1, a pair of rails 12 and 13 fixed to the frame 1, and a winding shaft disposed above the pair of rails 12 and 13 and parallel to the pair of rails 12 and 13. 14, a first drive unit 15 that rotates the winding shaft 14, a flange portion 16 that rotates according to the rotation of the winding shaft 15, and a fixing that is installed on the flange portion 16 and fixes one end of the steel material S. Part 161.

  The first drive unit 15 includes a first motor 151 and a gear box 152 having a coupling unit, a spur gear, and a flange unit for linking the rotational motion of the first motor 151 to the rotational motion of the flange portion 16. It is preferable that the fixing portion 161 is configured to fix one end of the steel material S at an angle that is the same as or substantially the same as an angle α of a bending fitting to be described later. The fixing part 161 and the steel material S may be fixed by welding (see FIG. 4), or a box lid or a coupling means (bolt, nut) that sandwiches and fixes one end of the steel material S may be used.

  Further, the screw blade manufacturing apparatus 1 includes a drive screw 21 having a double thread structure disposed between the pair of rails 12 and 13 and parallel to the pair of rails 12 and 13, and a first screw that rotates the drive screw 21. 2 includes a drive bed 22 and a movable bed 30 that is movably mounted on the pair of rails 12 and 13 and includes two bolts 23 and 24 that are screwed into the drive screw 21 at the bottom.

  As shown in FIG. 3, a sliding portion 34 made of a metal material having a predetermined strength and stretchability is provided at a location (contact location) of the movable bed 30 that contacts the pair of rails 12 and 13. In the present embodiment, the sliding portion 34 is made of brass.

  The second drive unit 22 includes a second motor 221 and a coupling unit 222 for linking the rotational motion of the second motor 221 with the rotational motion of the drive screw 21.

  As shown in FIG. 2, bolts 23 and 24 are provided in the lower part of the moving bed 30. By providing the bolts 23 and 24 that are screwed to the drive screw 21 having a double thread structure, the moving bed 30 can be moved stably and with high accuracy.

  Moreover, the screw blade manufacturing apparatus 1 is provided on the moving bed 30 and is provided on the moving bed 30 with a bending metal fitting 31 for placing a steel material at an angle α with respect to the winding shaft 14 and for winding. A bed winding bearing 32 into which the shaft 14 is inserted is provided. Further, a sliding portion (not shown) made of a metal material having a predetermined strength and extensibility is provided on the inner surface of the bed winding bearing 32 that comes into contact with the winding shaft 14. In the present embodiment, the sliding portion (not shown) is made of brass.

  Further, it is preferable that the bending fitting 31 is disposed below the winding shaft 14. The height position of the bending metal fitting 31 is set according to the pitch and outer diameter of the screw blades. As shown in FIG. 4, the angle α of the bending fitting 31 is set in accordance with the type (thickness, material), pitch, and outer diameter of the steel material S, and is, for example, 10 degrees to 30 degrees.

  Moreover, the screw blade manufacturing apparatus 1 controls the rotational speed of the flange part 16 (and the winding shaft 14) by controlling the first drive part 15 (the rotational speed of the first motor 151), and the second drive. The control part (not shown) which controls the moving speed of the moving bed 30 by controlling the part 22 (rotational speed of the 2nd motor 221) is provided. The control unit can be configured by a computer (connected to a memory storing an operation program), a dedicated circuit, a device incorporating firmware, or the like.

  In addition, the screw blade manufacturing apparatus 1 includes a winding bearing 18 that supports the winding shaft 14 at the other end different from the first drive unit 15. The winding bearing 18 is configured to incline in the direction of the arrow in FIG. 1 and disengage from the winding shaft 14 (the broken line diagram shows a detached state). Further, the inner surface of the winding bearing 18 that contacts the winding shaft 14 is provided with a sliding portion made of a metal material having a predetermined strength and extensibility. In the present embodiment, the sliding portion (not shown) is made of brass.

<Example>
A screw blade was manufactured by the screw blade manufacturing apparatus 1 using EBERHARD360 manufactured by JFE Steel as a steel material. Table 1 shows the manufactured screw blades.

  Even though it is a special steel having a strength higher than that of conventional steel and has a thickness (15 to 30 mm) and a blade width (40 to 75 mm), a screw blade having a highly accurate outer diameter and pitch could be produced.

DESCRIPTION OF SYMBOLS 1 Screw blade production apparatus 11 Frame 12, 13 A pair of rail 14 Winding shaft 15 1st drive part 16 Flange part 161 Fixing part 18 Winding bearing 21 Drive screw 22 2nd drive part 30 Moving bed 31 Bending metal fitting 32 Bed Roller bearing 34 For sliding part S Steel material

A screw blade manufacturing apparatus according to the present invention is a screw blade manufacturing apparatus for manufacturing an axisless screw blade from steel material having a strength higher than that of a general structural rolled steel (SS400) ,
Frame,
A pair of rails fixed to the frame;
A winding shaft disposed above the pair of rails and parallel to the pair of rails;
A first drive unit for rotating the winding shaft;
A flange portion that rotates according to the rotation of the winding shaft;
A fixing portion installed on the flange portion and fixing one end of the steel material;
A drive screw having a two-thread structure disposed between the pair of rails and parallel to the pair of rails;
A second drive unit for rotating the drive screw;
A movable bed that is movably mounted on the pair of rails and that has a screwing means for screwing into the drive screw at the bottom;
A bending fitting provided on the moving bed and mounting the steel material at an angle α with respect to the winding shaft;
A bed winding bearing provided on the moving bed and into which the winding shaft is inserted; and
A control unit that controls the rotational speed of the flange unit by controlling the first driving unit and controls the moving speed of the movable bed by controlling the second driving unit. To do.

As one embodiment of the present invention, the screwing means is provided at two lower portions of the movable bed.

Further, the screw blade manufacturing apparatus 1 includes a drive screw 21 having a double thread structure disposed between the pair of rails 12 and 13 and parallel to the pair of rails 12 and 13, and a first screw that rotates the drive screw 21. 2, a moving bed 30 that is movably mounted on the pair of rails 12 and 13 and has two screwing means 23 and 24 that are screwed to the driving screw 21 at the bottom.

As shown in FIG. 2, screwing means 23 and 24 are provided at the lower part of the moving bed 30. By providing the screwing means 23 and 24 to be screwed to the drive screw 21 having a double thread structure, the movable bed 30 can be moved stably and with high accuracy.

Claims (9)

A screw blade manufacturing device for producing an axisless screw blade from steel,
Frame,
A pair of rails fixed to the frame;
A winding shaft disposed above the pair of rails and parallel to the pair of rails;
A first drive unit for rotating the winding shaft;
A flange portion that rotates according to the rotation of the winding shaft;
A fixing portion installed on the flange portion and fixing one end of the steel material;
A drive screw having a two-thread structure disposed between the pair of rails and parallel to the pair of rails;
A second drive unit for rotating the drive screw;
A movable bed that is movably mounted on the pair of rails and includes a bolt that is screwed into the drive screw at the bottom;
A bending fitting provided on the moving bed and mounting the steel material at an angle α with respect to the winding shaft;
A bed winding bearing provided on the moving bed and into which the winding shaft is inserted; and
A screw blade manufacturing apparatus comprising: a control unit that controls a rotational speed of the flange unit by controlling the first driving unit and a moving unit of the moving bed by controlling the second driving unit. .   The screw blade manufacturing apparatus according to claim 1, wherein the bolt is provided at two lower portions of the moving bed.   The screw blade manufacturing apparatus of Claim 1 or 2 provided with the sliding part comprised with the extensible metal material in the location of the said movable bed which contacts with a pair of said rail.   The screw blade manufacturing apparatus of any one of Claim 1 to 3 provided with the sliding part comprised with the metal material which has a malleability in the inner surface of the said winding bearing for beds which contacts the said winding axis | shaft.   The screw blade manufacturing apparatus according to any one of claims 1 to 4, further comprising a winding bearing that supports the winding shaft at the other end different from the first drive unit.   The screw blade manufacturing apparatus according to claim 5, further comprising a sliding portion made of a metal material having malleability on an inner surface of the winding bearing in contact with the winding shaft.   The screw blade manufacturing apparatus according to any one of claims 1 to 6, wherein the bending metal fitting is configured to be adjustable in height.   The screw blade manufacturing apparatus according to any one of claims 1 to 7, wherein the bending metal fitting is configured to be capable of adjusting the angle α. The screw blade manufacturing apparatus according to any one of claims 1 to 8, wherein the bending metal fitting is disposed below the winding shaft.

Images