CN207592963U - A kind of internal thread helix initial angle positioning device - Google Patents

Abstract

The utility model provides a device for positioning the starting angle of an internal thread helix, which belongs to the technical field of fixtures. It solves the problems of low machining accuracy and high scrap rate of existing internal thread extensions. The internal thread helix starting angle positioning device includes a mounting seat and a connecting seat. One end of the mounting seat has a raised mounting column, the mounting column has external threads, and the other end of the mounting seat has a raised limiting column. The connecting seat has a limit hole, the limit post is embedded in the limit hole and the limit post can slide in the limit hole along the axial direction of the limit hole, and the connection seat and the installation seat are circumferentially positioned. The internal thread helix start angle positioning device has the advantages of high processing precision for internal thread extension and low scrap rate.

Description

A device for positioning the starting angle of the internal thread helix

technical field

The utility model belongs to the technical field of fixtures and relates to a positioning device for the starting angle of an internal thread helix.

Background technique

In production and assembly, threaded connections are often used to fasten parts. Therefore, it is often necessary to process threads on products, such as processing internal threads in hole-type products, and in the process of production and processing, the threads are first processed according to needs. However, after the processing is completed, the length of the originally processed thread is not enough due to various reasons, and the length of the processed thread needs to be increased.

One of the existing thread length extension methods is to use a die or a tap sleeve to tap the thread. Using this method to lengthen the thread, the processing efficiency is low, and it can only be used for small thread diameters, and the requirements for thread dimensional accuracy are not high. of thread. Another thread length supplement method is to use a CNC lathe to perform supplementary turning on the thread, but this method has high requirements for the radial degree of freedom, axial degree of freedom, and helix starting angle of the workpiece, especially The consistency requirements of the three degrees of freedom are very high in mass production. In production, the consistency requirements of radial degree of freedom and axial degree of freedom can be achieved by clamping with soft jaws, but because the internal thread is located inside the workpiece, it is difficult to observe, and the starting angle of the helix of the internal thread is difficult to control , often in the process of thread lengthening, the thread will be damaged, and the scrap rate is high.

Utility model content

The purpose of the utility model is to solve the above-mentioned problems in the prior art, and propose a device for positioning the starting angle of the internal thread helix. The technical problem to be solved is how to improve the machining accuracy when the thread is lengthened, and reduce the scrap rate.

The purpose of this utility model can be achieved through the following technical solutions: a positioning device for the starting angle of the internal thread helix, including a mounting seat and a connecting seat, characterized in that one end of the mounting seat has a raised mounting column, There is an external thread on the mounting post, the other end of the mounting seat has a protruding limiting post, the connecting seat has a limiting hole, the limiting post is embedded in the limiting hole and the limiting The position post can slide in the limit hole along the axial direction of the limit hole, and the connecting seat and the mounting seat are circumferentially positioned.

The internal thread helix start angle positioning device is used for thread lengthening processing of workpieces that already have internal threads. The connecting seat is installed on the turret of the machine tool, and the mounting column has external threads. The length of the mounting column is longer than the workpiece to be processed. The length of the thread, the workpiece to be processed is screwed to the mounting column and tightened, and the starting angle of the internal thread helix in the workpiece is controlled through the mounting column, with high control accuracy, thereby improving processing accuracy and reducing scrap rate; Then insert the limit column of the mounting seat into the limit hole of the connecting seat, move the turret, and extend the workpiece into the soft jaw of the machine tool, and control the radial and axial degrees of freedom of the workpiece through the soft jaw Carry out control, move the turret in the reverse direction to separate the mounting seat from the connecting seat, and then rotate the mounting seat to separate the workpiece from the mounting seat, and then perform thread compensation processing on the workpiece by moving the set distance of the tool. Each workpiece is positioned in the soft jaw through the mounting seat, connecting seat and mounting column, so that the consistency of the workpiece to be processed is good. When the workpiece is lengthening the thread, the cutting edge of the tool is always located in the trough of the thread, and the thread No damage, high machining accuracy and low scrap rate.

In the aforementioned internal thread helix start angle positioning device, when the limiting post is inserted into the limiting hole, the outer sidewall of the limiting post is in contact with the inner sidewall of the limiting hole. The mounting seat and the connecting seat are basically tightly fitted, and a certain external force is required to embed the limiting column into the limiting hole, and to separate the limiting column from the limiting hole. This structure improves the stability of the connecting seat installation, thereby improving The consistency of the workpieces whose threads are fixed on the mounting column makes the circumferential degree of freedom of each workpiece to be processed consistent, improves the machining accuracy when the workpiece is supplemented with threads, and reduces the scrap rate.

In the above-mentioned internal thread helix start angle positioning device, the outer wall of the limiting column has a long limiting groove, and the limiting groove runs through the end of the limiting column away from the installation column, A limiting pin is provided in the connecting seat, and the limiting pin can be inserted into a limiting groove to position the connecting seat and the mounting seat circumferentially. The limit groove and the limit pin play the role of limit and guide. The cooperation between the limit groove and the limit pin makes the connecting seat and the installation seat circumferentially positioned, and the limit groove runs through the end of the limit column away from the installation column to make the connection seat It can be detached from the mounting base, and the connecting base is convenient to be connected to and detached from the mounting base.

In the above-mentioned internal thread helix start angle positioning device, the two side walls of the limiting groove are inclined, and the part of the limiting pin in the installation groove has an inclined limiting surface. When the When the limiting column is embedded in the limiting hole, the limiting surface fits on the side wall of the limiting groove. This structure increases the contact area between the limit column and the limit pin, improves the stability of the connection between the connection seat and the installation seat, thereby improving the consistency of the workpiece threaded on the installation column and improving the workpiece compensation. High machining accuracy for long threads, reducing scrap rate.

In the aforementioned internal thread helix starting angle positioning device, the mounting seat further includes a mounting portion, the mounting column is located in the middle of one side of the mounting portion, and the limiting column is located at the other side of the mounting portion. In the middle, when the limiting post is inserted into the limiting hole, the mounting part protrudes out of the connecting seat. The mounting part protrudes from the connecting seat, which is convenient for the operator to grab the mounting part, and is convenient for the operator to insert the limit post into the limit hole, so that the connecting seat and the mounting seat are connected conveniently, and the processing efficiency is improved.

In the aforementioned device for positioning the starting angle of the helix of the internal thread, the outer wall of the installation part has a cut surface. The cut surface plays the role of marking, reminding the operator of the placement position of the connecting seat, which is convenient for the operator to align, makes the connection between the connecting seat and the mounting seat convenient, and improves the processing efficiency.

In the aforementioned device for positioning the starting angle of the helix of the internal thread, the mounting part has a mounting groove, and the mounting column is located in the middle of the mounting groove. The setting of the installation groove makes the processing of the installation column convenient, and the installation column will not protrude too much outside the installation part, which improves the machining accuracy of the installation column, thereby improving the installation accuracy of the workpiece, making the circumferential freedom of the workpiece consistent, and improving the machining accuracy , reduce scrap rate.

In the above-mentioned internal thread helix starting angle positioning device, the connecting seat has a positioning hole that penetrates to the limiting hole, and the connection between the positioning hole and the limiting hole is provided with a retaining edge. The positioning pin is set in the positioning hole, and the positioning hole is also provided with a limiting spring and a limiting plug. The limiting plug blocks the end of the positioning hole away from the limiting hole, and one end of the limiting spring is against the On the limit pin, the other end of the limit spring abuts against the limit plug, and the limit spring enables the limit pin to abut against the blocking edge and makes part of the limit pin be located in the positioning hole. Under the action of spring force, the limit pin is partially embedded in the limit groove, that is, the position of the limit pin can be fine-tuned according to actual needs, so that the circumferential positioning stability of the connecting seat and the mounting seat is good, and the connecting seat will not Offsetting the set position, the installation accuracy of the connecting seat is high, thereby improving the consistency of the workpiece to be processed, improving the processing accuracy when the workpiece thread is lengthened, and reducing the scrap rate.

In the above-mentioned internal thread helix start angle positioning device, there is also a buffer hole on the connecting seat, a buffer spring and a buffer positioning pin are arranged in the buffer hole, and a buffer spring and a buffer positioning pin are arranged on the outer wall of the buffer positioning pin. A buffer groove, the inner side wall of the buffer hole has a buffer protrusion, the buffer protrusion is partially embedded in the buffer groove, one end of the buffer spring is against the connecting seat, and the other end of the buffer spring is against the On the buffer positioning pin, the buffer projection can abut against the groove wall of the buffer groove under the action of the elastic force of the buffer spring. The buffer bump prevents the buffer positioning pin from falling off from the buffer hole. Under the action of the buffer spring force, the buffer positioning pin acts as a buffer, so that the workpiece will not collide with the soft jaw, which improves the installation accuracy of the workpiece. Thereby improving the machining accuracy of the workpiece.

In the aforementioned internal thread helix starting angle positioning device, the connecting seat includes a first connecting portion and a second connecting portion, and the limiting hole, the positioning hole and the buffer hole are all located in the first connecting portion, The second connecting part is located in the middle of one side of the first connecting part, the limiting hole is located in the middle of the other side of the first connecting part, the positioning hole is located above the limiting hole, and the buffer hole is located in the middle of the other side of the first connecting part. Below the limiting hole, the openings of the limiting hole and the buffer hole have the same orientation. The positioning hole is located above the limit hole. Under the double action of the spring force of the limit spring and the gravity of the limit pin itself, part of the limit pin can be better embedded in the limit groove, which improves the stability of the connection seat installation, thereby Improve the consistency of the workpiece whose thread is fixed on the mounting column, improve the machining accuracy when the workpiece is supplemented with thread, and reduce the scrap rate.

Compared with the prior art, the internal thread helix start angle positioning device provided by the utility model has the following advantages:

1. The connecting seat of the internal thread helix line starting angle positioning device protrudes from the mounting column with external thread, and the circumferential degree of freedom of the workpiece to be processed is controlled by the mounting column, so that the consistency of each workpiece after positioning Well, when the workpiece is lengthening the thread, the cutting edge of the tool is always located in the trough of the thread, the thread will not be damaged, and the machining accuracy is high, thereby reducing the scrap rate of the workpiece.

2. The connecting seat and the mounting seat of the internal thread helical starting angle positioning device are positioned circumferentially, and the connecting seat and the mounting seat can be separated. Through the cooperation of the connecting seat and the mounting seat, the consistency of each workpiece after positioning is good. The connecting seat and the mounting seat can be separated by moving the turret during processing. When the workpiece is lengthening the thread, the blade of the tool is always located in the trough of the thread, the thread will not be damaged, and the machining accuracy is high, thereby reducing the scrap rate of the workpiece. .

Description of drawings

Fig. 1 is a cross-sectional view of the overall structure of the internal thread helix start angle positioning device.

Fig. 2 is a cross-sectional view of the internal thread helix start angle positioning device when the connecting seat is connected to the workpiece.

Fig. 3 is a rear view of the connecting seat of the internal thread helix start angle positioning device.

Fig. 4 is a rear view of the internal thread helix start angle positioning device.

In the figure, 1. Mounting seat; 11. Mounting column; 12. Limiting column; 13. Limiting groove; 14. Mounting part; 15. Cutting surface; 16. Mounting groove; 2. Connecting seat; 22. The first connection part; 23. The second connection part; 3. Limit pin; 4. Positioning hole; 5. Blocking edge; 6. Limit spring; 7. Limit plug; 8. Buffer hole; 9. Buffer spring; 10, buffer positioning pin; 17, buffer groove; 18, buffer bump; 19, workpiece.

Detailed ways

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

This internal thread helix start angle positioning device is a tool for supplementing the length of the workpiece 19 due to the short length of the thread on the workpiece 19 that has been processed. As shown in Figure 1 and Figure 2, the internal thread The helix starting angle positioning device includes a mounting base 1 and a connecting base 2 .

The mounting base 1 also includes a spacer post 12 and a mounting portion 14. There is a mounting groove 16 in the middle of one side of the mounting portion 14. The spacer post 12 is located in the middle of the other side of the mounting portion 14. The mounting column 11 is provided, and the mounting column 11 has an external thread, and the outer wall of the mounting part 14 has a cut surface 15 . As shown in Figure 3, there is a strip-shaped limiting groove 13 on the outer wall of the limiting column 12, the limiting groove 13 runs through the end of the limiting column 12 away from the mounting column 11, and the two side walls of the limiting groove 13 are inclined set up.

The connecting base 2 includes a first connecting portion 22 and a second connecting portion 23, the first connecting portion 22 is flat, the second connecting portion 23 is columnar, and the first connecting portion 22 is provided with a limiting hole 21, a positioning hole 4 and a buffer Hole 8, the second connecting portion 23 is located in the middle of one side of the first connecting portion 22, the limiting hole 21 is located in the middle of the other side of the first connecting portion 22, the positioning hole 4 is located above the limiting hole 21, and the buffer hole 8 is located below the limiting hole 21, and the openings of the limiting hole 21 and the buffer hole 8 have the same orientation.

The positioning hole 4 penetrates to the positioning hole 21, and the junction of the positioning hole 4 and the positioning hole 21 is provided with a retaining edge 5, and the positioning pin 3 is penetrated in the positioning hole 4, and the positioning hole 4 is also provided with a limiting spring 6 and The limit plug 7, the limit plug 7 blocks the end of the positioning hole 4 away from the limit hole 21, one end of the limit spring 6 leans against the limit pin 3, and the other end of the limit spring 6 leans against the limit On the plug 7 , the limit spring 6 enables the limit pin 3 to abut against the stop edge 5 and makes part of the limit pin 3 be located in the limit hole 21 .

The buffer hole 8 is provided with a buffer spring 9 and a buffer positioning pin 10. The buffer positioning pin 10 has a buffer groove 17 on the outer wall, and the buffer hole 8 has a buffer protrusion 18 on the inner wall, and the buffer protrusion 18 is partially embedded in the buffer groove. In 17, one end of the buffer spring 9 leans against the connecting seat 2, and the other end of the buffer spring 9 leans against the buffer positioning pin 10, and the buffer protrusion 18 can lean against the buffer positioning pin under the elastic force of the buffer spring 9 10 on.

When the limit post 12 is embedded in the limit hole 21, the outer wall of the limit post 12 fits the inner wall of the limit hole 21, and the part of the limit pin 3 located in the installation groove 16 has an obliquely arranged limit position. The limit surface fits on the side wall of the limit groove 13, and the limit pin 3 can be embedded in the limit groove 13 so that the connecting seat 2 and the mounting seat 1 are circumferentially positioned. As shown in Figure 4, the mounting part 14 Part protrudes outside the connecting seat 2.

During processing, the connecting seat 2 is fixed on the turret of the machine tool, the workpiece 19 to be processed is screwed and connected to the mounting column 11, and then the limiting column 12 of the mounting seat 1 is inserted into the limiting hole 21 of the connecting seat 2 , position the connecting seat 2 and the mounting seat 1 in the circumferential direction, move the turret, insert the workpiece 19 into the soft jaws of the machine tool, clamp the workpiece 19 through the soft jaws, and then move the turret in reverse to make the mounting seat 1 is separated from the connecting seat 2, and then the mounting seat 1 is rotated to separate the workpiece 19 from the mounting seat 1. Finally, the workpiece 19 is threaded to lengthen through the tool. After the processing is completed, the workpiece 19 is unloaded to complete the processing of a workpiece 19.

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Although the installation seat 1, the installation column 11, the limit column 12, the limit groove 13, the installation part 14, the cutting surface 15, the installation groove 16, the connection seat 2, the limit hole 21 and the first connection part 22 are used more frequently in this paper. , the second connecting part 23, the limit pin 3, the positioning hole 4, the retaining edge 5, the limit spring 6, the limit plug 7, the buffer hole 8, the buffer spring 9, the buffer positioning pin 10, the buffer groove 17, the buffer convex Block 18, workpiece 19 and other terms, but does not exclude the possibility of using other terms. These terms are only used to describe and explain the essence of the utility model more conveniently; interpreting them as any kind of additional limitation is contrary to the spirit of the utility model.

Claims (10)

1. a kind of internal thread helix initial angle positioning device, including mounting base (1) and connecting seat (2), which is characterized in that described One end of mounting base (1) has the mounting post (11) of protrusion setting, has external screw thread, the mounting base on the mounting post (11) (1) the other end has the limited post (12) of protrusion setting, has limit hole (21), the limited post on the connecting seat (2) (12) be embedded into limit hole (21) and the limited post (12) can in limit hole (21) sliding axially along limit hole (21), The connecting seat (2) and mounting base (1) are circumferentially positioned.

2. a kind of internal thread helix initial angle positioning device according to claim 1, which is characterized in that when the limiting When column (12) is embedded into limit hole (21), the madial wall of the lateral wall and limit hole (21) of the limited post (12) fits.

A kind of 3. internal thread helix initial angle positioning device according to claim 1, which is characterized in that the limited post (12) there is elongated limiting slot (13), the limiting slot (13) is through limited post (12) far from mounting post on lateral wall (11) one end is equipped with spacer pin (3) in the connecting seat (2), and the spacer pin (3), which can be embedded into limiting slot (13), makes institute It states connecting seat (2) and mounting base (1) is circumferentially positioned.

A kind of 4. internal thread helix initial angle positioning device according to claim 3, which is characterized in that the limiting slot (13) two side is obliquely installed, and part of the spacer pin (3) in mounting groove (16) has the confined planes being obliquely installed, When the limited post (12) is embedded into limit hole (21), the confined planes are fitted on the side wall of limiting slot (13).

5. a kind of internal thread helix initial angle positioning device according to claims 1 or 2 or 3 or 4, which is characterized in that The mounting base (1) further includes mounting portion (14), and the mounting post (11) is positioned at the middle of mounting portion (14) side, the limit Position column (12) is positioned at the middle of mounting portion (14) opposite side, when the limited post (12) is embedded into limit hole (21), institute Mounting portion (14) part is stated to protrude in connecting seat (2) outside.

A kind of 6. internal thread helix initial angle positioning device according to claim 5, which is characterized in that the mounting portion (14) there are section (15) on lateral wall.

A kind of 7. internal thread helix initial angle positioning device according to claim 5, which is characterized in that the mounting portion (14) there is mounting groove (16), the mounting post (11) is positioned at the middle of mounting groove (16) on.

A kind of 8. internal thread helix initial angle positioning device according to claim 3 or 4, which is characterized in that the company There is the location hole (4) for being through to limit hole (21), the location hole (4) and the junction of limit hole (21) are set in joint chair (2) There is gear along (5), the spacer pin (3) is threaded through in location hole (4), and limit spring (6) and limit are additionally provided in the location hole (4) Position plug (7), the limiting plug (7) block the one end of location hole (4) far from limit hole (21), the limit spring (6) one End is resisted against on spacer pin (3), and the other end of the limit spring (6) is resisted against on limiting plug (7), the limit spring (6) make spacer pin (3) that gear can be resisted against along (5) and make part spacer pin (3) in limit hole (21).

A kind of 9. internal thread helix initial angle positioning device according to claim 8, which is characterized in that the connecting seat (2) on also there is cushion hole (8), buffer spring (9) and buffering positioning pin (10), the buffering are equipped in the cushion hole (8) On the lateral wall of positioning pin (10) there is dashpot (17), there is buffering convex block (18), institute on the madial wall of the cushion hole (8) Buffering convex block (18) to be stated to be partially embedded into dashpot (17), one end of the buffer spring (9) is resisted against on connecting seat (2), The other end of the buffer spring (9) is resisted against on buffering positioning pin (10), the institute under the action of the buffer spring (9) elastic force Stating buffering convex block (18) can be resisted against on the cell wall of dashpot (17).

A kind of 10. internal thread helix initial angle positioning device according to claim 9, which is characterized in that the connection Seat (2) includes first connecting portion (22) and second connecting portion (23), and the limit hole (21), location hole (4) and cushion hole (8) are equal In first connecting portion (22), the second connecting portion (23) is positioned at the middle of first connecting portion (22) side, the limit Position hole (21) is positioned at the middle of first connecting portion (22) opposite side, and the location hole (4) is positioned at the top of limit hole (21), institute Cushion hole (8) is stated positioned at the lower section of limit hole (21), the opening of the limit hole (21) and cushion hole (8) is towards identical.