阅读说明：本技术 加工超短件螺纹过渡圆弧夹具 (Clamp for processing transition arc of ultrashort part thread ) 是由 李斌 郭玉堂 尹军 于 2019-09-30 设计创作，主要内容包括：本发明公开了一种超短件螺纹过渡圆弧夹具,其特征在于；在定位套A(1)侧面中部固定安装有销子A(2),前面固定连接定位套B(4),定位套B(4)上面设置有定位槽(6),定位套A(1)、定位套B(4)套在轴(5)外面可转动,轴(5)后面固定连接定位座(7)前面,定位座(7)后面固定连接定位杆(8),定位座(7)下部前面固定安装有销子B(9),销子B(9)、销子A(2)之间用弹性件(3)连接。本发明自动定位,自动卸料,短夹层螺栓过渡圆滑,滚丝径长度尺寸一致,滚压螺纹时不会出现螺纹收尾长度超。(The invention discloses an ultrashort member thread transition arc clamp which is characterized in that a clamping part is arranged on the outer side of a clamping head; the locating device is characterized in that a pin A (2) is fixedly mounted in the middle of the side face of a locating sleeve A (1), the locating sleeve B (4) is fixedly connected in front, a locating groove (6) is formed in the locating sleeve B (4), the locating sleeve A (1) and the locating sleeve B (4) are sleeved outside a shaft (5) in a rotatable mode, a locating seat (7) is fixedly connected to the back of the shaft (5) in front, a locating rod (8) is fixedly connected to the back of the locating seat (7), a pin B (9) is fixedly mounted in front of the lower portion of the locating seat (7), and the pin B (9) and the pin A (2). The invention has the advantages of automatic positioning, automatic discharging, smooth transition of the short interlayer bolt, consistent thread rolling diameter length and size, and no appearance of thread ending length excess during thread rolling.)

1. An ultrashort member thread transition arc clamp is characterized in that a clamping groove is arranged on the outer side of a clamping head; the locating device is characterized in that a pin A (2) is fixedly mounted in the middle of the side face of a locating sleeve A (1), the locating sleeve B (4) is fixedly connected in front, a locating groove (6) is formed in the locating sleeve B (4), the locating sleeve A (1) and the locating sleeve B (4) are sleeved outside a shaft (5) in a rotatable mode, a locating seat (7) is fixedly connected to the back of the shaft (5) in front, a locating rod (8) is fixedly connected to the back of the locating seat (7), a pin B (9) is fixedly mounted in front of the lower portion of the locating seat (7), and the pin B (9) and the pin A (2).

2. Ultrashort piece thread transition arc fixture as claimed in claim 1, wherein the locating sleeve a (1) is cylindrical.

3. Ultrashort piece thread transition arc fixture as claimed in claim 1, wherein the locating sleeve B (4) is cylindrical.

4. Ultrashort-piece thread transition arc fixture as claimed in claim 1, wherein the positioning slot (6) is a recessed semicircular, triangular or square opening.

5. Ultrashort piece thread transition arc fixture as claimed in claim 1, wherein the positioning socket (7) is cylindrical.

6. Ultrashort-piece thread transition arc clamp according to claim 1, wherein the positioning rod (8) is square.

7. Ultrashort piece thread transition arc fixture as claimed in claim 1, wherein the positioning sleeve a (1) and the positioning sleeve B (4) are rotatably detachable around the shaft (5).

8. Ultrashort-piece thread transition arc fixture as claimed in claim 1, wherein the elastic member (3) is a spring or a rubber band.

Technical Field

The invention belongs to the technical field of machinery, and particularly relates to an ultrashort part thread transition arc clamp.

Background

The sunk ultrashort bolt has too short polished rod part and can not be clamped by a numerically controlled lathe to machine the diameter of the rolled thread. When the diameter of the rolled thread blank is ground, the end face of the rod part is tightly pressed by the mandril of the grinding machine to position so as to determine the processing length of the rolled thread diameter, so that the length of the interlayer is not easy to control in a required range. When the hexagonal lathe is used for turning the threaded polished rod for transition, the consistency is poor, the conditions of out-of-tolerance, deflection and the like are easy to occur, and the thread rolling diameter is easy to be damaged by clamping of the hexagonal lathe during clamping or the hexagonal lathe is turned into a chamfer shape, so that the transition of the short interlayer bolt is not smooth. The consistency of the length and the size of the thread rolling diameter is poor, and the problem of the out-of-tolerance of the thread ending length is easy to occur during thread rolling.

Disclosure of Invention

The invention aims to overcome the defects and provide the ultrashort part thread transition arc clamp which has the advantages of automatic positioning, automatic discharging, smooth transition of a short interlayer bolt, consistent thread rolling diameter length and size and no appearance of the overtravel of the thread ending length during thread rolling.

The purpose of the invention and the main technical problem of solving the invention are realized by adopting the following technical scheme:

the invention discloses an ultrashort member thread transition arc clamp which is characterized in that a clamping part is arranged on the outer side of a clamping head; the middle part of the side surface of the positioning sleeve A is fixedly provided with a pin A, the front part of the positioning sleeve A is fixedly connected with a positioning sleeve B, a positioning groove is arranged on the positioning sleeve B, the positioning sleeve A and the positioning sleeve B are sleeved outside the shaft in a rotatable mode, the rear part of the shaft is fixedly connected with the front part of the positioning seat, the rear part of the positioning seat is fixedly connected with a positioning rod, the front part of the lower part of the positioning seat is fixedly provided with a pin B (9), and.

The locating sleeve A is cylindrical.

The locating sleeve B is cylindrical.

The positioning groove is a concave semicircular, triangular or square opening.

The positioning seat is cylindrical.

The locating rod is square.

The positioning sleeve A and the positioning sleeve B are sleeved outside the shaft and can be rotationally disassembled.

The elastic element is a spring or a rubber band.

Compared with the prior art, the invention has obvious beneficial effects, and the technical scheme can show that: the positioning sleeve A and the positioning sleeve B are sleeved outside the shaft and can rotate, the rear of the shaft is fixedly connected with the front of the positioning seat, the rear of the positioning seat is fixedly connected with the positioning rod, the front of the lower part of the positioning seat is fixedly provided with the pin B, and the pin B and the pin A are connected through the elastic piece. The method is characterized in that an ultra-short bolt unprocessed part is pre-installed in a positioning groove, and a numerical control program is adjusted to enable the diameter of a rolled thread blank to be opposite to the center of an ejector rod. Starting a program, feeding the tool rest along the negative direction of the z axis, ejecting and propping the unprocessed bolt part by a spring preset on the ejector rod, tightly propping the unprocessed ultrashort bolt part on the positioning seat, clamping the unprocessed short bolt part by using a three-jaw chuck, and realizing automatic positioning, thereby avoiding positioning deviation caused by different forces applied during manual clamping of workers and ensuring that the head end surface of the unprocessed ultrashort bolt part is at the same position. And after the feeding is finished, switching a special turning tool to process a transition arc. At the moment, the end face of the head is used as a positioning reference, the positioning reference is consistent with a measuring reference, the tool rest moves forward along the negative direction of the x axis for cutting, after turning is completed, the tool rest moves to a fixed position, the three-jaw chuck is loosened, a spring preset on the ejector rod is retracted and separated from the bolt, the elastic piece between the pin B and the pin A pulls the positioning sleeve A and the positioning sleeve B to rotate outside the shaft, the bolt rotates along with the positioning sleeve B and is separated from the positioning groove under the action of centrifugal force, and therefore the consistency of the interlayer length during turning of the transitional arc is guaranteed. Automatic discharging is realized. The ultra-short bolt transition arc is ensured by a numerical control program, meanwhile, a tool compensation value can be set by a numerical control lathe, the consistency of products can be ensured, the transition arc of the short interlayer bolt is smooth, the thread rolling diameters are consistent in length, and the thread ending length is not over when the thread is rolled; the invention has the advantages of automatic positioning, automatic discharging, smooth transition of the short interlayer bolt, consistent thread rolling diameter and length, and no appearance of overtravel of thread ending length during thread rolling.

Drawings

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

FIG. 2 is a front view of the present invention;

FIG. 3 is a cross-sectional view of FIG. 2A-A;

FIG. 4 is a bottom view of the present invention;

FIG. 5 is a schematic structural view of a positioning sleeve A and a positioning sleeve B according to the present invention;

FIG. 6 is a schematic view of the shaft, positioning seat and positioning rod of the present invention;

FIG. 7 is a state diagram of the present invention in use;

FIG. 8 is a front elevational view of the ultra short piece bolt of the present invention;

FIG. 9 is a front view of the ultra short bolt of the present invention after processing;

fig. 10 is an enlarged view of fig. 9 a.

Marked in the figure;

1. positioning sleeves A, 2, pins A, 3, elastic parts 4, positioning sleeves B, 5, shafts 6, positioning grooves 7, positioning seats 8, positioning rods 9, pins B, 10, ejector rods 11, bolts 12, tool rests 13 and arcs.

Detailed Description

The invention discloses an ultrashort member thread transition arc clamp which is characterized in that a clamping part is arranged on the outer side of a clamping head; the middle part of the side surface of the positioning sleeve A1 is fixedly provided with a pin A2, the front part of the positioning sleeve A1 is fixedly connected with a positioning sleeve B4, the upper surface of the positioning sleeve B4 is provided with a positioning groove 6, the positioning sleeve A1 and the positioning sleeve B4 are sleeved outside the shaft 5 and can rotate, the rear part of the shaft 5 is fixedly connected with the front part of the positioning seat 7, the rear part of the positioning seat 7 is fixedly connected with a positioning rod 8, the front part of the lower part of the positioning seat 7 is fixedly provided with a pin B9, and the.

The locating sleeve A1 is cylindrical.

The locating sleeve B4 is cylindrical.

The positioning groove 6 is a recessed semicircular, triangular or square opening.

The positioning socket 7 is cylindrical.

The positioning rod 8 is square.

The positioning sleeve A1 and the positioning sleeve B4 are sleeved outside the shaft 5 and can be rotatably disassembled.

The elastic member 3 is a spring or a rubber band.

During processing, referring to fig. 7-10, the unprocessed parts of the ultrashort part bolt 11 are pre-installed in the positioning groove 6, and the numerical control program is adjusted to enable the diameter of the rolled thread blank to be opposite to the center of the ejector rod 10. Starting a program, feeding the tool rest 12 along the negative direction of the z axis, ejecting and propping the unprocessed part of the bolt 11 by a spring preset on the ejector rod 10, tightly propping the unprocessed part of the ultra-short bolt 11 on the positioning seat 7, and clamping the unprocessed part of the short bolt 11 by using a three-jaw chuck, thereby avoiding the positioning deviation caused by different forces applied during manual clamping of workers and ensuring that the head end surface of the unprocessed part of the ultra-short bolt 11 is at the same position. After the feeding is finished, a special turning tool is switched to process the transition arc 13. At the moment, the end face of the head is used as a positioning reference, the positioning reference is consistent with a measuring reference, the tool rest 12 moves forward along the negative direction of the x axis for cutting, after the turning is finished, the tool rest moves to a fixed position, the three-jaw chuck is loosened, the spring preset on the ejector rod 10 is retracted to be separated from the bolt 11, the elastic piece 3 between the pin B9 and the pin A2 pulls the positioning sleeve A1 and the positioning sleeve B4 to rotate outside the shaft 5, and the bolt 11 rotates along with the positioning sleeve B4 and is separated from the positioning groove 6 under the action of centrifugal force.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the present invention without departing from the technical spirit of the present invention.