CN217799446U

CN217799446U - Lower chip discharging screw tap with chip discharging chute

Info

Publication number: CN217799446U
Application number: CN202221189411.6U
Authority: CN
Inventors: 王晟; 马鹏飞; 杨志嘉
Original assignee: Tianjin Hongsheng Technology Co ltd
Current assignee: Tianjin Hongsheng Technology Co ltd
Priority date: 2022-05-18
Filing date: 2022-05-18
Publication date: 2022-11-15
Anticipated expiration: 2032-05-18

Abstract

The utility model relates to a lower chip removal screw tap with chip removal chute is provided with the chip removal chute between the back sword arc of the preceding blade surface of every sword to the sword of side, and this chip removal chute is used for advancing the quick discharge downwards of the piece of this department. The utility model discloses in, the chip removal chute has enlarged helicla flute lower extreme open-ended size, and make the helicla flute be close to one side more slope of opening of the preceding flank of sword, make the piece advance can be more quick when helicla flute lower extreme opening downwards discharge from this, can not form the jam in this department, also can not be because of chip removal speed fish tail screw hole wall is slow, through the experiment, the rotational speed of conical head can improve 1100-1200 revolutions per minute, very big improvement work efficiency, the manufacturing cost of screw hole processing producer has been reduced.

Description

Lower chip discharging screw tap with chip discharging chute

Technical Field

The utility model belongs to the technical field of the quick chip removal of screw tap improves, especially a lower chip removal screw tap with chip removal chute.

Background

The tap generally comprises a conical head 5 and a conical rod 6, wherein the conical head is used for cutting a threaded hole and calibrating, the tail end of the conical rod is provided with a connecting end 7 used for connecting a driving device, as shown in fig. 1, a cutting edge 3 is arranged on the conical head, a chip groove 4 is arranged between the cutting edge, and the conical head is provided with three cutting edges and three chip grooves. The chip grooves can be straight grooves or spiral grooves, wherein the spiral grooves are divided into left-handed and right-handed, when the conical head rotates clockwise along with the conical rod (commonly called right blade), the front blade face 2 at the front end of the blade cuts the inner wall of the threaded hole, when the spiral grooves rotate left, the conical head is commonly called left-handed right blade, and at the moment, the left-handed rotation enables chips cut by the blade to be discharged downwards along the spiral grooves; when the spiral groove is right-handed, the conical head is commonly called a right-handed right blade, and the right-handed rotation enables chips cut by the right blade to be discharged upwards along the spiral groove. When the left-handed right edge structure is used, the rotating speed of the conical head can reach 600-700 revolutions per minute, but in actual production, the rotating speed of the conical head of the left-handed right edge structure is further improved, and the rotating speed is not realized, mainly because the cut chips cannot be discharged in time, the spiral grooves can be blocked or the inner walls of the threaded holes at the lower end openings of the spiral grooves can be scratched due to the slow chip removal speed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's not enough, provide a lower chip removal screw tap with chip removal chute. In the structure, the lower end opening of the left-handed spiral groove of the conical head is provided with the inclined quick chip removal chute, when the conical head rotates clockwise, the spiral groove rotates left and enables chips to be discharged downwards, the chip removal chute enables the chips to advance to the position to be quickly ejected, the chip removal speed is greatly improved, and through tests, the rotating speed of normal work of the conical head can be improved to 1100-1200 revolutions per minute.

The utility model adopts the technical proposal that:

the utility model provides a lower chip removal screw tap with chip removal chute, radially set up three sword on the conical head of screw tap, be provided with levogyration helicla flute, its characterized in that between two adjacent sword: a chip discharge chute is arranged between the front edge surface of each edge and the back edge arc of the side edge and is used for rapidly discharging chips which travel to the position downwards.

Further: one end of the chip removal chute is positioned on the surface of the front blade face of one blade at the opening at the lower end of the spiral groove, and the other end of the chip removal chute obliquely extends upwards and is positioned on the surface of the spiral groove below the rear blade arc of the blade beside the spiral groove.

And further: one side edge of the chip removal chute close to the front edge surface is smoothly connected with the front edge surface at the same side.

Further: the other side edge of the chip removal chute close to the back edge arc and the back edge arc of the side edge can be smoothly connected.

And further: the depth of the chip removal chute decreases gradually from one end to the other.

Further: the other end of the chip discharge chute is aligned with any one of the 5 th to 7 th teeth of the conical head.

Further: the spiral groove is a left-handed spiral groove with a spiral angle of 12-14 degrees;

the angle of the acute angle included angle between the central line of the chip removal chute in the long direction and the axis of the conical head is 13-15 degrees.

The utility model discloses an advantage is with positive effect:

the utility model discloses in, set up a chip removal chute between the back sword arc of the preceding blade surface of a sword of helicla flute lower extreme opening part and the sword of side, this chip removal chute reduces for the degree of depth in straight flute and groove from the one end that is close to the conical head lower extreme to the other end that is close to conical head 5-7 teeth gradually, and the axis contained angle of the long direction central line of chip removal chute and conical head is 13-15 degrees. The chip removal chute enlarges the size of the lower end opening of the spiral groove, and enables the spiral groove to be more inclined close to the opening on one side of the front blade face of the blade, so that chips can be more quickly discharged downwards when moving to the opening on the lower end of the spiral groove, blockage can not be formed at the position, and the wall of a threaded hole can not be scratched due to slow chip removal speed.

Drawings

FIG. 1 is a schematic view of the present invention;

fig. 2 is an enlarged left side view of fig. 1.

Detailed Description

The present invention is further described with reference to the following examples, which are illustrative and not intended to be limiting, and the scope of the present invention is not limited by the following examples.

The utility model provides a lower chip removal screw tap with chip removal chute, as shown in the figure, radially set up three sword 3 on the conical head 5 of screw tap, be provided with levogyration helicla flute 4 between two adjacent sword, the utility model discloses an innovation lies in: a chip discharge chute 1 is arranged between the front edge face 2 of each edge and the back edge arc 8 of the side edge and is used for rapidly discharging the chips which travel to the position downwards.

In this embodiment, one end 11 of chip removal chute is located the surface department of the preceding blade surface of a sword of spiral groove lower extreme opening part, the spiral groove surface department of the other end slope upwards extending and being located the back blade arc below of the sword of side. Referring to the upper left position of fig. 1, the chip discharge chute 1 extends from the left side (one end of the chip discharge chute) obliquely to the right side (the other end of the chip discharge chute) and gradually inclines upward in the lateral direction of fig. 1.

The left side tip of above-mentioned chip removal chute has actually taken up a part of sword 3 in the middle part of figure 1, and it can be known from figure 1 that the left side tip of sword 3 has become littleer, and the leading cause of processing like this is in order to guarantee three structure, specifically is: 1. the included angle between the chip removal chute and the axis of the conical head; 2. the end of the right side of the chip discharge chute (the other end of the chip discharge chute) in fig. 1 is approximately at the position of 5 th-7 th teeth; 3. the side 10 of the rear edge arc of the chip removal chute near the other side edge is positioned at the tail end of the other end of the chip removal chute and is intersected with the rear edge arc of the other side edge, so that the rear edge arc of the other side edge cannot be damaged, and the interference problem is avoided. Although the left end of the blade 3 is reduced, the strength of the blade can still reach the service life of the original structure from practical tests.

In order to ensure the cutting effect of the front edge surface, the right side 2 is the front edge surface of the edge 3, and the front edge surface is provided with an opening 11 at one end of a chip discharge chute, and as can be seen from the figure, one side edge (the right side of the figure 2) of the chip discharge chute close to the front edge surface is smoothly connected with the front edge surface at the same side.

The other side 10 of the chip discharge chute adjacent the back edge arc may be a smooth connection to the back edge arc of the flank edge or a non-smooth connection as shown in fig. 1 (where the intersection line, reference numeral 10, appears). The preferred configuration is a smooth connection of the two, allowing the chips to better follow the surface of the leading edge facet, chip evacuation chute, spiral flute and trailing edge arc at a rapid pace.

The groove depth of the chip removal chute from one end to the other end is gradually reduced. Referring to fig. 1, the depth of the groove decreases gradually from the left side to the right side in the drawing. The length of the chip removal chute is as follows: the other end of the chip removal chute is aligned with any one of the 5 th to 7 th teeth of the bit. The spiral groove is a left-handed spiral groove with a spiral angle of 12-14 degrees. The angle beta of the acute angle between the central line of the long direction of the chip removal chute and the axis of the conical head is 13-15 degrees, preferably 14 degrees.

The utility model discloses a course of working is:

1. the tap is fixed to the fixture and placed as shown in figure 1.

2. Driving the clamp to act:

firstly, tilting a left end part of a screw tap along the vertical direction of a drawing 1 to form an included angle between the axis of the screw tap and a horizontal plane to be 13-15 degrees;

secondly, integrally rotating the tap in the step 1 along the longitudinal direction of the drawing 1 by 9-11 degrees to the rear side;

thirdly, rotating the tap finished in the step 2 clockwise by 22-26 degrees along the axis. (clockwise is clockwise according to the left end face of FIG. 1)

3. And (5) starting the grinding wheel, moving the grinding wheel to the direction of the clamp, and finishing grinding of the chip removal chute.

4. The finished product has the structure shown in figures 1 and 2.

The method includes the steps of firstly, meeting an angle of a beta angle; the angle of the second step can be adjusted according to the front angle of the blade; and step three, in order to enable the groove wall of the chip removal chute to be a smooth cambered surface.

The machining process provides machining of the structure of the screw tap with the three-edge and three-spiral groove structure, in actual production, a machining person is informed of whether the beta angle and the other end of the chip removal chute are located at the position of the second tooth of the screw tap and are in smooth connection and the groove depth of one end of the chip removal chute, and the machining person can adjust the machining process according to the number of edges of the screw tap, the spiral angle of the spiral groove and other parameter fonts.

The utility model discloses in, set up a chip removal chute between the back sword arc of the preceding blade surface of a sword of helicla flute lower extreme opening part and the sword of side, this chip removal chute reduces for the degree of depth in straight flute and groove from the one end that is close to the conical head lower extreme to the other end that is close to conical head 5-7 teeth gradually, and the axis contained angle of the long direction central line of chip removal chute and conical head is 13-15 degrees. The chip removal chute enlarges the size of the lower end opening of the spiral groove, and enables the spiral groove to be more inclined close to the opening on one side of the front blade face of the blade, so that chips can be more quickly discharged downwards when moving to the opening on the lower end of the spiral groove, blockage can not be formed at the position, and the wall of the threaded hole can not be scratched.

Claims

1. The utility model provides a chip discharge screw tap down with chip removal chute, radially set up three sword on the conical head of screw tap, be provided with levogyration helicla flute, its characterized in that between two adjacent sword: a chip discharge chute is arranged between the front edge surface of each edge and the back edge arc of the side edge and is used for rapidly discharging chips which travel to the position downwards.

2. The lower chip discharging tap with a chip discharge chute as claimed in claim 1, wherein: one end of the chip removal chute is positioned on the surface of the front blade face of one blade at the opening at the lower end of the spiral groove, and the other end of the chip removal chute obliquely extends upwards and is positioned on the surface of the spiral groove below the rear blade arc of the blade beside the spiral groove.

3. The lower chip discharging tap with a chip discharge chute as claimed in claim 2, wherein: one side edge of the chip removal chute close to the front blade surface is smoothly connected with the front blade surface on the same side.

4. A lower chip discharging tap with a chip discharge chute according to claim 2 or 3 wherein: the other side edge of the chip removal chute close to the back edge arc can be smoothly connected with the back edge arc of the side edge.

5. The lower chip discharging tap with a chip discharge chute as claimed in claim 4, wherein: the depth of the chip removal chute decreases gradually from one end to the other.

6. The lower chip discharging tap with a chip discharge chute as claimed in claim 5, wherein: the other end of the chip discharge chute is aligned with any one of the 5 th to 7 th teeth of the conical head.

7. The lower chip discharging tap with a chip discharge chute as claimed in claim 6, wherein: the spiral groove is a left-handed spiral groove with a spiral angle of 12-14 degrees;