CN201989120U

CN201989120U - Screw-type broken cutter removing device

Info

Publication number: CN201989120U
Application number: CN2011200311375U
Authority: CN
Inventors: 李季; 张旭东; 曹磊; 李伟东; 张金明; 霍俊兰; 董策; 李晓刚; 张俊波; 胡凤杰
Original assignee: Dongfeng Chaoyang Diesel Co Ltd
Current assignee: Dongfeng Chaoyang Diesel Co Ltd
Priority date: 2011-01-28
Filing date: 2011-01-28
Publication date: 2011-09-28
Anticipated expiration: 2021-01-28

Abstract

The utility model discloses a screw-type broken cutter removing device which is used to remove a broken cutter during the machining process. The broken cutter removing device comprises a clamping sleeve and a lifting rod, wherein an internal thread is formed on the clamping sleeve, the lower port of the clamping sleeve adopts a tapered slope, a lifting handle is arranged at the upper segment of the lifting rod, an external thread segment is arranged at the 1/3 part of the lower segment, and a clamping head is arranged at the bottommost end of the lower segment. The lifting rod is partially screwed into the clamping sleeve to push the broken end of the cutter into the clamping head; a fastening handle is rotated clockwise to move the clamping sleeve downward; when the tapered slope of the clamping sleeve is in contact with the slope of the clamping head, the head part of the clamping head is compressed by the engagement of the threads to tightly clamp the broken cutter and simultaneously the lifting handle is rotated counterclockwise, so that the broken cutter that is left in a work piece is pushed out. The device is substantially coaxial to the broken cutter, so as to prevent the formation of a torque offset from the axis, and besides, the contact area of the clamping head with the cutter is increased. The device provides great convenience for taking out the cylindrical tools which are liable to be broken, such as awls and drill bits, and has strong utility values.

Description

Rotation cutter broken end trips out device

Technical field

The utility model belongs to machine tool, is specifically related to a kind ofly in machining process, and gripping remains in the device that trips out of cutter in the workpiece.

Background technology

In machining process, usually can take place that cutter fractures in workpiece and the situation that is difficult to take out.For example need process screw thread in circular hole, need screw tap (dedicated tool of machining screw) is inserted in the circular hole this moment, slowly screws in circular hole after fixing screw tap with the strand thick stick, carries out craft or machine tooling and go out internal thread.Machining industry personage all knows, if the aperture of circular hole less than given size, perhaps screw tap is not vertical with processing plane, so in process, excessive or the deflection if the strand thick stick is exerted oneself a little, the screw tap first half very easily fractures in circular hole, only stays a broken end outside.This situation also comprises when using bit bore, the drill bit situation in circular hole that fractures.Take out if think the cutter (screw tap or drill bit) that will fracture this moment, it is dark more that very difficulty, and cutter screws in, and trips out just difficult more.Running into the general way of this situation is, clamps the cutter broken end that is exposed at the workpiece outside with pliers or other instrument, slowly along counterclockwise screwing out.But since screw tap or drill bit workpiece make up tong very tight, the broken end that is exposed at the workpiece outside is very short and small again, is difficult to fixing tightly with pliers, again and again operation very easily damages circular hole or internal thread, severe patient will make whole work-piece scrap.Especially in hole processing processes such as engine body, cylinder cover, often have screw tap to break wherein, take out if can not can't harm (workpiece), it is sizable causing its loss of scrapping of workpiece.If a kind of instrument that the cutter that fractures is fixedly clamped and can takes out smoothly can be provided, then be that the institute of the industry asks.

Goal of the invention

The purpose of this utility model provides the device that trips out that a kind of gripping remains in the cutter that breaks end in the workpiece.

Summary of the invention

Below in conjunction with accompanying drawing structural principle of the present utility model is described.Rotation cutter broken end trips out device and comprises gripping sleeve and lifting arm, and the technical scheme of its structure is, gripping sleeve is provided with internal thread, and the upper end welding of gripping sleeve screws handle, and the lower port of gripping sleeve is a tapered slope.The epimere of lifting arm welding lifting handle, lifting arm hypomere 1/3 place is an external thread section, external thread section be dop (as Fig. 1) bottom.The external thread section of lifting arm screws in gripping sleeve composition cutter broken end and trips out device.The action principle that cutter broken end trips out device is: the taper surface that utilizes the gripping sleeve lower port and the lifting arm taper surface of dop bottom contact, and tightly block the jail by screwing the gripping sleeve cutter that will break end.Cutter broken end tripped out device and became one with the broken end cutter this moment, therefore rotated the handle on the lifting arm, and just easily the cutter that will break end of safety takes out in workpiece.

Description of drawings

Fig. 1 is the utility model structure principle chart.

Fig. 2 adds tight tube structure figure in the utility model.

Fig. 3 is a lifting arm structure chart in the utility model.

Fig. 4 is the two pawl dop structure charts that amplify in the utility model.

The specific embodiment

Below by concrete embodiment structural principle of the present invention is described further.Rotation cutter broken end trips out device, and by lifting arm with step up to overlap two parts and forms (as Fig. 1), gripping sleeve 1 is provided with internal thread, and the upper end of gripping sleeve is welded and screwed handle 2-1, and the lower port of gripping sleeve is tapered slope 3 (as Fig. 2).The epimere of lifting arm 4 welding lifting handle 2-2, lifting arm hypomere 1/3 place is an external thread section 5, external thread section be dop 6 (as Fig. 3) bottom.The external thread section 5 of lifting arm 4 screws in gripping sleeve 1 composition cutter broken end and trips out device (Fig. 1).The circular surface of dop 6 also is a tapered slope, and angle of taper is identical with the tapered slope 3 of the lower port of gripping sleeve.Dop 6 is three-jaw or two pawls, and dop 6 pinching ends are provided with anti-slop serrations 7, and anti-slop serrations or be triangular form perhaps is annular knurl shape (as Fig. 4).

Considering that thin more cutter is easy more fractures, so the dop of present embodiment is two pawl types, the maximum cutter external diameter of dop (chucking) is 10mm, and anti-slop serrations 7 is an annular knurl shape.The precession of lifting arm part is stepped up cover, and the broken end of the cutter that fractures (as screw tap) is inserted in the dop.Clockwise rotate and screw handle 2-1 closing sleeve is moved down, when the tapered slope 3 of gripping sleeve contacts with the inclined-plane of dop, along with making the head of dop, screw-threaded coupling power shrinks, can tightly clamp the cutter 8 that breaks, rotate counterclockwise lifting handle 2-2 this moment, just the screw tap that fractures in workpiece can be released.If the cutter that fractures is a drill bit, can drill bit be taken out both forward and reverse directions rotation lifting handle.

Characteristics of the present utility model and beneficial effect are:

(1) cutter broken end taking-out device is same axis with the broken end cutter substantially, avoids producing and is partial to axial moment, reduces to greatest extent cutter the again probability of fracture takes place.

(2) dop increased with the broken end cutter contact area, prevent from skidding; The area of the suffered clamping force of broken end cutter increases.

(3) for easily broken cylinder knife tool, operation is very easy such as taking-ups such as screw tap, drill bit, reamers, has stronger practical value.

Claims

1. rotation cutter broken end trips out device, comprise gripping sleeve and lifting arm, it is characterized in that gripping sleeve (1) is provided with internal thread, the upper end welding of gripping sleeve screws handle (2-1), the lower port of gripping sleeve is a tapered slope (3), the epimere welding lifting handle (2-2) of lifting arm (4), and lifting arm hypomere 1/3 place is external thread section (5), external thread section be dop (6) bottom, the external thread section (5) of lifting arm (4) screws in gripping sleeve (1) and forms the cutter broken end and trip out device.

2. trip out device according to the described rotation cutter broken end of claim 1, the circular surface that it is characterized in that described dop (6) also is tapered slope, angle of taper is identical with the tapered slope (3) of the lower port of described gripping sleeve, described dop (6) is three-jaw or two pawls, dop (6) pinching end is provided with anti-slop serrations (7), anti-slop serrations or be triangular form perhaps is an annular knurl shape.