KR100538256B1 - Thread cutting machine for reinforcing bar - Google Patents

Abstract

The present invention relates to a screw processing apparatus for processing a male thread on the end of the rebar, and to allow the reciprocating movement as well as the rotational movement of the cutting tool through a single motor, thereby allowing convenient and rapid processing as well as miniaturization of the processing apparatus In addition, the mobility and field applicability of the rebar thread processing equipment are remarkably improved.

Through the present invention, it is possible to secure the high processing speed and processing precision, as well as the mobility and field application of the rebar end screw processing apparatus, thereby increasing the efficiency and precision of the reinforcement work can obtain the effect of reducing the air and construction costs In addition, the fastening strength of the reinforcing bar can also be increased, thereby securing the performance of the structure.

Description

Rebar end thread processing equipment {THREAD CUTTING MACHINE FOR REINFORCING BAR}

The present invention relates to a screw processing apparatus for processing a male thread on the end of the rebar, and to allow the reciprocating movement as well as the rotational movement of the cutting tool through a single motor, thereby allowing convenient and rapid processing as well as miniaturization of the processing apparatus In addition, the mobility and field applicability of the rebar thread processing equipment are remarkably improved.

In the case of reinforcing reinforcement for reinforcement of reinforced concrete structures, the general reinforcing method of reinforcing bar is to overlap the both ends of the reinforcing bar to a certain length and then tie it with a wire, etc., and use a joint or welding device to weld the connecting part. There are mechanical joints to connect. In general, mechanical joints are used for joints of large diameter reinforcing bars, and the typical mechanical joints are male threads formed at both ends of the reinforcing bars and matched with female threads. A method of coupling a coupler may be mentioned.

In the reinforcement through threaded reinforcing bars, couplers can be mass-produced as ready-made products, but since the rebars are changed in shape and dimension every time according to the size or shape of the structure, they are generally threaded to the end of the rebar through custom-made or field machining. Will form.

The apparatus for male threading of reinforcing bar ends includes US Patent 4,213,722 (TRANSPORTABLE EXTERNAL THREAD CUTTING MACHINE, 1980) and US Patent 4,526,496 (TAPERED THREAD CUTTING MACHINE, 1985). Of course, many improvements have been made compared to manual work, such as taper screw processing.

However, in the conventional rebar thread processing apparatus, the rotational movement of the cutting tool for forming the thread is made by a motor, but the axial reciprocation of the rebar to be processed is performed through pinions and racks connected to the handles. It was configured to be done manually, so each handle had to be handled manually, and therefore, the speed and precision of the work had to be limited.

In particular, when reciprocating a cutting tool manually, it is almost impossible to operate with a constant force and speed, so that the tip of the machined screw is frequently recessed, and there is a problem that a high degree of skill is required in the operation of the processing device. .

In order to solve this problem, a method of mounting a separate motor for the reciprocating motion of the cutting tool may be considered, but in this case, the reciprocating motor and its accessories will inevitably increase the size of the screw processing device and the motor for the rotational motion. In addition to the need for a high-level control device for the interlock and the reciprocating motor, there is a serious problem that is difficult to secure field applicability due to mobility.

The present invention has been made in view of the above-mentioned problems, and constitutes a motor reciprocating band and a cutting head reciprocating band reciprocating along a guide rod fixed to a frame, and the motor reciprocating band and the cutting head reciprocating band are respectively a motor and a cutting head. The cutting head is connected to the motor through a gear assembly including a transfer gear to be driven, and the tip is coupled to the transfer nut fixed to the front of the frame, and the screw is installed therein through the thrust bearing. It is coupled to the motor reciprocating and cutting head reciprocating band, by connecting the transfer gear and the screw gear, so that the cutting head reciprocating reciprocating as the motor is rotated, the reciprocating motion as well as the rotational movement of the cutting tool through a single motor It is possible.

The detailed structure and operation principle of the present invention will be described with reference to the accompanying drawings.

First, as shown in FIG. 1, the present invention includes a cutting head 50 that is rotated by a motor 30 and a vise 70 on which a processing target reinforcement 80 is fixed, and a frame 20 on which they are installed.

Cutting head 50 has a bite 52 built therein, and the cutting head 50 and the motor 30 are framed by the cutting head reciprocating band 51 and the motor reciprocating band 31, respectively. It is coupled to a pair of parallel guide rods 22 fixed to (20), the guide rod 22 and the cutting head reciprocating band 51 and the motor reciprocating band 31 is connected through the guide bearing 62 These cutting head reciprocating band 51 and the motor reciprocating band 31 is configured to freely reciprocate along the guide rod 22, as shown in FIG.

In addition, a vise 70 having a jaw 71 is installed at the front upper end of the frame 20 to be manipulated by the vise handle 72 to fix the rebar 80 to be processed. The configuration of the vise 70 is a general workpiece fixing means of the machine tool, which can be applied by a person of ordinary skill in the art to which the present invention belongs, and thus the detailed description and the claims are not limited thereto.

The cutting head 50 and the motor 30 are connected through the gear assembly 40 such that the rotational force of the motor 30 is transmitted to the cutting head 50. As an embodiment of the gear assembly 40, FIG. And a set of reduction gear groups composed of a main gear 41, a driven gear 42, an internal gear 43, and the like as shown in FIG. 5.

In addition, the gear assembly 40 has a feed gear 44, connected to the screw gear 11 installed on the feed screw 10, the feed screw 10 is formed with a male screw on the outer peripheral surface thereof as shown in FIG. Is coupled to the transfer nut 21 fixed to the front of the frame 20, and as the motor 30 rotates, the transfer screw 10 also rotates and reciprocates along its axis.

As such, the transfer screw 10 rotated and reciprocated by the motor 30 has a motor reciprocating band 31 and a cutting head reciprocating band by a thrust bearing 61 as shown in FIGS. 4 and 5. 51, the transfer screw 10 is rotated and reciprocated, so that the motor reciprocating band 31 and the cutting head reciprocating band 51 also reciprocate.

Therefore, as the motor 30 rotates, the cutting head 50 is rotated and, of course, reciprocated, so that a screw is formed in the rebar 80 without a separate operation, and such a threaded rebar 80 is illustrated in FIG. 6. As such, the coupling between the reinforcing bar 80 through the coupler 81 is made.

In forming the screw on the rebar 80, the cutting tool such as the bite 52 should be replaced according to the specification of the screw such as the pitch and the rotational speed and the reciprocating speed of the cutting tool should be adjusted. The adjustment of is possible by mounting the transmission through a gear combination, etc. This is a matter that can be applied to those of ordinary skill in the art that the present invention belongs to the specific description or claims are not limited thereto.

7 is a modified embodiment of the present invention, the handle 20 is installed on the frame 20 to make the movement more convenient.

Finally, the technical gist of the present invention is a cutting head 50 that is rotated by a motor 30 in the rebar end screw processing apparatus for processing a male thread on the end of the reinforcement 80 fixed by the vise 70, the frame ( The cutting head reciprocating band 51 and the motor reciprocating band 31 which are reciprocated along the guide rod 22 fixed to 20 are installed, and the cutting head reciprocating band 51 and the motor reciprocating band 31 are respectively cut. The head 50 and the motor 30 are installed, the cutting head 50 is connected to the motor 30 and rotated through the internal gear 43, the driven gear 42, the main gear 41, the frame ( 20) The screw screw 11 is fixed to the center portion of the feed screw 10, the tip end of which is screwed to the feed nut 21 fixed to the front part, and the cutting head reciprocating band 51 and the motor reciprocating band to the left and right sides thereof. (31) is fitted and coupled in a state of receiving a thrust by the rotary contact, the screw gear 11 is the transfer gear 44, the internal gear 43, By being connected to the motor 30 through the synchronous gear 42 and the main gear 41, the cutting head 50 is rotated as one motor 30 and the cutting head 50 and the motor 30 are in the same stroke. Rebar end screw processing apparatus, characterized in that configured to achieve a small and light weight by reciprocating in the distance.

The present invention is a reinforcing end screw processing apparatus, the prior art is the rotation of the cutting head for the thread cutting process using the electric power of the motor, according to the forward cutting stroke and the no-load state after the forward cutting stroke of the rotating cutting head The retraction stroke is carried out by manual means using pinions and racks, or the cutting head is rotated using a motor dedicated to the cutting head, and the forward cutting stroke and the retraction stroke of the cutting head are transferred as separate transfer motors. The screw was rotated, or the cutting head was rotated and the forward cutting stroke was carried out by one motor. However, the reversal stroke of the no-load state after the cutting stroke was performed by rotating the feed screw as a separate motor. Inconvenient problem due to transfer and work by large weight by mounting two motors The rebar end screw processing apparatus of the present invention, which was devised to solve the problem because the maneuverability of the intestine was inferior, is not only the rotational movement of the cutting head 50, which is a thread cutting tool, but also the cutting head 50 as a motor 30. It is designed to allow the reciprocating movement of the forward cutting stroke of the) and the retraction return stroke of the no-load state after the cutting stroke, thereby maximizing the compactness and weight, thereby greatly improving the maneuverability to the work site.

1 is a perspective view of the present invention.

Figure 2 is a perspective view of the operating state of the present invention.

3 is a representative cross-sectional view of the present invention.

4 is a partially cutaway perspective view of the present invention.

5 is an exploded perspective view of main parts of the present invention.

Figure 6 is an illustration of the steel bars processed through the present invention.

Figure 7 is a perspective view of one embodiment of the present invention the handle is installed.

<Code Description of Main Parts of Drawing>

10: transfer screw

11: screw gear

20: frame

21: Nut

22: guide rod

23: handle

30: motor

31: Motor Round Trip (Carriage)

40 Gear-assembly

41: main gear

42: driven gear

43: internal gear

44: feed gear

50: Cutting Head

51: cutting head reciprocating band

52: Bite

61: thrust bearing

62: guide bearing

70 Vice

71: Jaw

72: vise handle

80: rebar

81: Coupler

Claims (1)

In the rebar end screw processing apparatus for processing a male screw on the end of the reinforcing bar 80 fixed by the vise 70 as a cutting head 50 rotated by the motor 30, The cutting head reciprocating band 51 and the motor reciprocating band 31 which are reciprocated along the guide rod 22 fixed to the frame 20 are installed. The cutting head reciprocating band 51 and the motor reciprocating band 31 are provided with a cutting head 50 and a motor 31, respectively, Cutting head 50 is connected to the motor 30 through the internal gear 43, the driven gear 42, the main gear 41 is rotated, The screw 10 is fixed to the center portion of the feed screw 10 in which the tip is screwed to the feed nut 21 fixed to the front of the frame 20, and the left and right cutting head reciprocating bands 51 and the motor are fixed. Reciprocating member 31 is fitted to be coupled in a state receiving a thrust (推力) by the rotary contact, The screw gear 11 is connected to the motor 30 through the transfer gear 44, the internal gear 43, the driven gear 42, the main gear 41, Rebar end characterized in that the cutting head 50 is rotated as one motor 30 and the cutting head 50 and the motor 30 are reciprocated at the same stroke distance to achieve a compact and light weight. Thread processing equipment.