CN2241599Y

CN2241599Y - Cutting head for steel bar taper thread screw-threading machine

Info

Publication number: CN2241599Y
Application number: CN 95241141
Authority: CN
Inventors: 胡炳炎; 陆彩林; 苏耀法; 徐军民
Original assignee: GAS-PRESSURE WELDING MACHINE FACTORY XISHAN CITY
Current assignee: GAS-PRESSURE WELDING MACHINE FACTORY XISHAN CITY
Priority date: 1995-12-22
Filing date: 1995-12-22
Publication date: 1996-12-04
Anticipated expiration: 2005-12-22

Abstract

The utility model discloses a cutting head for steel bar taper thread screw-threading machine, comprising a flange plate and a tool post body. The tool post body is successively sheathed with a poke ring, a worm fixing ring, an active ring and a fixed ring from back to front; the front end of the tool post body is provided with a tool post; a comb-shaped tool is fixed on the tool post; the comb-shaped tool is tangentially arranged corresponding to the outer circumference of a processed steel bar; the bottom width of the comb-shaped tool is larger than the top width of the comb-shaped tool to form an included angle which is coincident with the cone angle of the processed steel bar. Using the utility model to process the steel bar, cutting force is small, the service life of a cutting tool is long, and processing cost is low.

Description

Taper thread of reinforcing bar die head threading machine cutting head

The utility model relates to a kind of taper thread of reinforcing bar die head threading machine cutting head of the reinforcing bar head being carried out screw thread processing.

At present in building trade, the cutter that the reinforcing bar head is carried out the cutting head of screw thread mantle fiber all is to be radial arrangement with respect to the external diameter of processed reinforcing bar, when the reinforcing bar head is carried out mantle fiber, can heat up with the increase of mantle fiber length, the service life of cutter is short, the processing cost height.

The purpose of this utility model is to provide the taper thread of reinforcing bar die head threading machine that a kind of cutter life is long, processing cost is low cutting head.

Above-mentioned purpose of the present utility model realizes by following technical solution: taper thread of reinforcing bar die head threading machine cutting head of the present utility model has a ring flange and tool post, on the tool post from after be set with successively forward and stir circle, worm screw retainer plate and active ring, the front end of tool post is equipped with some tool rests, is fixed with comb knife on this tool rest.Its design feature is that the comb knife on the tool rest is arranged tangential with respect to the cylindrical of processed reinforcing bar, and the bottom width of comb knife is greater than its end face width, to form an angle that matches with the cone angle of processed reinforcing bar.

Because cutter of the present utility model is arranged tangential with respect to processed reinforcing bar, and reinforcing bar is being added man-hour, cutting force is little, cutter can not heat up with the increase of length of cut, and long service life is through statistics on probation, be 2 times of radial arrangement cutter its service life, greatly reduces processing cost.

Below in conjunction with drawings and Examples the utility model is described in further detail:

Fig. 1 is a taper thread of reinforcing bar die head threading machine cutting head cross-sectional schematic;

Fig. 2 is that schematic diagram is looked on the right side of Fig. 1;

Fig. 3 is the tool post cross-sectional schematic;

Fig. 4 is that schematic diagram is looked on the left side of Fig. 3;

Fig. 5 is that schematic diagram is looked on the right side of Fig. 3;

Fig. 6 is worm screw retainer plate and tool post mated condition partial schematic sectional view;

Fig. 7 is the tool rest schematic diagram;

Fig. 8 is the A-A cross-sectional schematic of Fig. 7;

Fig. 9 is the elevational schematic view of Fig. 7;

Figure 10 is the comb knife schematic diagram;

Figure 11 is the schematic top plan view of Figure 10.

With reference to Fig. 1-11, cutting head ring flange 1 of the present utility model is enclosed within on the output shaft 2 of motorized speed reducer.The ring flange excircle has longitudinal hole on fin, also be processed with screw on the quincunx boss of tool post 28 rear inside accordingly, by dowel screw the two is closely linked together.Be processed with two steps on the external diameter of tool post 28, be processed with worm gear on its small end external diameter, have four through holes and four screws that are evenly distributed and match with rotating shaft 6 on its small end end face in order to link to each other with tool rest 9.Suit one is stirred circle 3 on another step of tool post 28, and this outer circle diameter of stirring circle matches with the shift fork slide block 17 that is fixed on shift fork 18 inboards to having groove, stirs circle 3 fronts and also is provided with two alignment pins 16 symmetrically, and the front end of alignment pin is taper.This alignment pin 16 matches with two axial through holes on the worm screw retainer plate 4.Have two radial holes that parallel with its line of centres on the both sides cylindrical of the two axial through hole lines of centres of worm screw retainer plate, cut mutually with the endoporus of worm screw retainer plate 4 in one of them hole, 23 worm screw 22 is not fixed in this hole with the opening spiral shell, and worm screw 22 is meshed with worm gear on the tool post 28, so that adjust the cutting external diameter of cutter.The bottom in another hole communicates with mounting hole, and push rod 26 is housed in it, is with spring 25 on the push rod, and its oral area is fixed with tight cap 24.Be with active ring 5 on tool post 28 cylindricals of worm screw retainer plate 4 fronts, the back of active ring is processed with two blind holes that match with alignment pin 16 accordingly, the both sides of these two blind hole lines of centres are opened a through hole respectively symmetrically, be connected by the microcephaly of tight fit in the through hole, be with tool rest slide block 8 on the big end external diameter of slide block fixed axis with slide block fixed axis 7.The back of tool rest 9 has elongated slot 29, and this elongated slot matches with tool rest slide block 8.Be processed with through hole 30 on the tool rest 9, this through hole matches with rotating shaft 6 on being installed in tool post 28, with tool rest hold-down screw 13 tool rest 9 and rotating shaft 6 is linked together.The outside of the through hole 30 on the tool rest 9 is processed with comb knife mounting groove 31, the bottom surface 34 of comb knife and side 33 contact with the bottom surface 36 and the side 37 of this mounting groove 31 respectively, with screw 10, pressing plate 11 and adjustment screw 14 comb knife 12 are fixed in the mounting groove 31 on the tool rest 9.The width of comb knife 12 bottom surfaces 34 is greater than the width of its end face 35, and in order to form an angle, the cone angle of this angle and processed reinforcing bar matches.A handle 21 is equipped with in the outside of shift fork 18, and the fork outside of this handle offside is hinged by axle 20 and support 19.The utility model when work, make by handle 21 and to stir circle 3 and close up with worm screw retainer plate 4.This moment, the column part of alignment pin 16 inserted in the positioning sleeve 15 that is arranged on the active ring 5, and rotary worm 22 adapts cutter and processed reinforcing bar external diameter, can begin cutting.After touching the distance caging device that is arranged on the frame when handle 21, extract gradually in the positioning sleeve 15 of alignment pin 16 from the active ring 5, add spring 25, push rod 26 on the worm screw retainer plate 4 and the effect that is fixed on the spacer pin 27 on the active ring 5, make active ring 5 rotate and drive tool rest 9 and rotate, thereby realize automatic withdrawal.

Claims

1, taper thread of reinforcing bar die head threading machine cutting head, comprise ring flange (1) and tool post (28), on the tool post from after be set with successively forward and stir circle (3), worm screw retainer plate (4) and active ring (5), the front end of tool post (28) is equipped with some tool rests (9), be fixed with comb knife (12) on this tool rest, it is characterized in that the comb knife (12) on the tool rest (9) is arranged tangential with respect to the cylindrical of processed reinforcing bar; The width of the bottom surface of comb knife (34) is greater than the width of its end face (35), to form an angle that matches with the cone angle of processed reinforcing bar.

2, taper thread of reinforcing bar die head threading machine cutting head according to claim 1, it is characterized in that on the external diameter of tool post (28) a plurality of steps being arranged, be processed with worm gear on the external diameter of its leading portion, along its axial boring some through holes that match with rotating shaft (6) are arranged, its rear end is connected on the ring flange (1) by bolt sleeve.

3, taper thread of reinforcing bar die head threading machine cutting head according to claim 1 and 2, it is characterized in that having symmetrically on the worm screw retainer plate (4) two parallel with its center line, the axial hole in order to match with alignment pin (16), have the radial hole that two lines of centres are parallel to each other on the both sides cylindrical of this two axial holes line of centres, one cuts mutually with the endoporus of worm screw retainer plate (4), worm screw (22) is installed in it, and this worm screw is meshed with worm gear on the tool post (28); The bottom in another hole communicates with axial mounting hole on the worm screw retainer plate (4), and push rod (26) is housed in it, is with spring (25) on this push rod, and its oral area is fixing with tight cap (24).