CN114473389A

CN114473389A - Nut production process

Info

Publication number: CN114473389A
Application number: CN202210202025.4A
Authority: CN
Inventors: 吴为生; 吴为居
Original assignee: Yiwu Changxin Transmission Technology Co ltd
Current assignee: Yiwu Changxin Transmission Technology Co ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2022-05-13
Anticipated expiration: 2041-01-29
Also published as: CN113001105B; CN114473389B; CN113001105A

Abstract

The invention discloses a nut production process, which comprises the following steps: firstly, preparing an outer shell and an inner embedded body, wherein the outer shell and the inner embedded body are made of different materials; a through hole is formed in the outer shell; secondly, fixedly installing the embedded body in the through hole of the outer shell to form a nut semi-finished product; forming a screw hole matched with the screw rod in the inner inlay; and machining the outer shell to form a nut finished product. Compared with the prior art, the embedded type transmission nut has the advantages that the embedded type is embedded in the outer shell, so that the performance of materials can be fully utilized, and the quality and the cost of the transmission nut are balanced. The tight connection of the inner inlay and the outer shell is realized through the spinning process, so that the inner inlay and the outer shell are integrally fixed, the processing process is simple, the cost is low, and the competitiveness of a nut product is further improved.

Description

Nut production process

The patent application of the invention is a divisional application of Chinese patent application No. 202110124464.3, the application No. of the original application is 202110124464.3, the application date is 2021, 01, 29 days, and the invention name is a production process of a high-performance novel nut.

Technical Field

The invention relates to the field of manufacturing of transmission nuts, in particular to a nut production process.

Background

The screw rod and nut mechanism is also called a screw transmission mechanism. It is mainly used to convert rotary motion into linear motion or linear motion into rotary motion. Mainly for transferring energy (such as screw press, jack, etc.); feed screws, such as machine tables, which are primarily used to transmit motion); and a screw transmission mechanism for adjusting the relative positions of the parts. The traditional transmission nut structure is made of the same material, for example, steel is used for processing and manufacturing, but the steel material has the defects of poor wear resistance, large movement resistance and the like. However, the nut made of steel has better structural strength and can be well installed and connected with mechanical parts on a machine. The nut made of the copper material is improved in wear resistance and motion resistance, but the production cost of the nut is greatly increased, the structural strength of the copper material is not the same as that of steel, and the difficulty in locking the copper nut and a mechanical part is increased.

Therefore, how to innovate the nut is a key direction of research in the industry. In view of the above, the applicant has made an intensive study on the above-mentioned defects in the prior art, and has made this invention.

Disclosure of Invention

The invention mainly aims to provide a nut production process which has the characteristics of improving the quality of nuts and reducing the production cost.

In order to achieve the above purpose, the solution of the invention is:

a nut production process comprises the following steps:

firstly, preparing an outer shell and an inner embedded body, wherein the outer shell and the inner embedded body are made of different materials; a through hole is formed in the outer shell;

secondly, fixedly installing the embedded body in the through hole of the outer shell to form a nut semi-finished product;

forming a screw hole matched with the screw rod in the inner inlay; and machining the outer shell to form a nut finished product.

Further, in the first step, when the outer shell is prepared, internal threads are formed in the through hole of the outer shell; when the inlay is prepared, external threads are formed on the outer wall of the inlay; in the nut semi-finished product, the inner inlay is connected with the outer shell through threads.

Further, the shell body is made of steel, and the inlay is made of polymer plastic or copper.

Further, a central hole is formed in the inlay in the step I, and a driving hole for driving the inlay to rotate is formed in the upper edge of the central hole; and the central hole is used for processing a screw hole in the step III.

Further, the maximum distance between the edge of the driving hole and the central hole is smaller than the small diameter of the formed screw hole.

Further, the machining of the outer shell in the third step includes machining a threaded section on an outer wall of the outer shell.

And further, spinning the end part of the outer shell by using spinning equipment, forming a butting part on the end part of the outer shell, and butting and tightly embedding the inner inlay in the outer shell by using the butting part.

Furthermore, in the first step, a limit step is arranged in the through hole of the prepared outer shell, and in the second step, one end of the inlay body abuts against the limit step.

Further, the spinning equipment comprises a base, a spindle box, a rotating chuck, a moving platform, a spinning head and a propping mechanism, wherein the spindle box is connected to the base, and the rotating chuck is rotationally connected to the spindle box; the base is provided with a slide rail, and the mobile station is arranged on the slide rail in a sliding manner; the base is provided with a transverse driving mechanism for driving the mobile station to move; the abutting mechanism is arranged on the moving platform, and the spinning head is arranged on the abutting mechanism;

the outer shell of the nut semi-finished product is fixedly arranged on the rotary chuck to rotate, and the spinning head and the abutting mechanism approach to the nut semi-finished product along with the moving of the mobile station; and the abutting mechanism performs spinning on the spinning head towards the end part of the outer shell far away from the rotating chuck to form an abutting part.

Furthermore, the abutting mechanism comprises a hydraulic cylinder, and a control button used for controlling the hydraulic cylinder to stretch is further arranged on the spindle box.

Further, the transverse driving mechanism comprises a driving screw rod which is rotatably arranged on the base; the driving screw is arranged in parallel with the slide rail; and a driving nut in threaded connection with the driving screw is arranged at the bottom of the mobile station, and a driving runner is further arranged at the end part of the driving screw.

Furthermore, a limit screw is fixedly connected to the mobile station and arranged in parallel with the slide rail; the base is provided with a limiting column, the limiting column is provided with a limiting hole, and the limiting screw penetrates through the limiting hole; and the limiting screw rods on the two sides of the limiting hole are respectively in threaded connection with a first limiting wheel and a second limiting wheel.

Furthermore, the upper ends of the spindle box and the limiting column are connected with a connecting plate, and a lighting lamp is arranged on the connecting plate.

After the structure is adopted, the nut production process provided by the invention at least has the following beneficial effects:

the nut is produced through the outer shell and the embedded body, the outer shell and the embedded body are made of different materials, so that the embedded body can be made of materials with wear resistance and low resistance, and the outer layer is made of materials which are convenient to machine and have better structural strength. Therefore, the two parts of the outer shell and the inner embedded body respectively and fully utilize the excellent performance of respective materials, so that the improved nut has better service performance and lower cost.

And secondly, forming an external thread on the outer shell in advance, and forming an internal thread on the inner inlay, so that the outer shell can be connected with the inner inlay through the threads, and the position relation of the inner inlay and the outer shell is preliminarily defined. Further, the end portion of the outer shell is spin-formed into the abutting portion by the spinning device, so that the movement of the inlay in the axial direction is restricted. Thus, the embedded body is firmly and fixedly arranged in the outer shell.

And thirdly, a driving hole is formed in the end part of the center hole, and the embedded body can be conveniently driven to rotate relative to the outer shell through a rotating chuck matched with the driving hole, so that the embedded body is in threaded connection with the outer shell. The driving hole in the central hole can be removed when the screw hole in the embedded body is formed.

Compared with the prior art, the embedded type transmission nut has the advantages that the embedded type is embedded in the outer shell, so that the performance of materials can be fully utilized, and the quality and the cost of the transmission nut are balanced. The tight connection of the inner inlay and the outer shell is realized through the spinning process, so that the inner inlay and the outer shell are integrally fixed, the processing process is simple, the cost is low, and the competitiveness of a nut product is further improved.

Drawings

Fig. 1 is a process route diagram of a nut production process according to the present invention.

Fig. 2 is a schematic perspective view of a nut product.

Fig. 3 is a sectional structure diagram of the nut finished product.

Fig. 4 is a schematic perspective view of a nut semi-finished product.

Fig. 5 is an exploded view of the outer shell and the inner inlay.

Fig. 6 is a sectional structure diagram of the nut semi-finished product.

Fig. 7 is a schematic structural view of the nut semi-finished product in the direction a in fig. 6.

Fig. 8 is a sectional structure diagram of the nut finished product.

Fig. 9 is a schematic perspective view of the spinning apparatus.

Fig. 10 is a side view configuration diagram of the spinning apparatus.

Fig. 11 is a schematic top view of the spinning apparatus.

In the figure:

an outer shell 1; a through hole 11; internal threads 111; a threaded segment 12; a butting portion 13; a limit step 14;

an inlay 2; an external thread 21; a central bore 22; a driving hole 221; a screw hole 23;

a nut semi-finished product 3;

4, a nut finished product;

a spinning device 5; a base 51; a main spindle box 511; a spin chuck 512; a slide rail 513; a mobile station 52; a limit screw 521; a first restraint wheel 522; a second spacing wheel 523;

a spinning head 53; a hydraulic cylinder 54; a control button 541;

a drive screw 551; a drive wheel 552; a drive nut 553;

a stopper post 56; a stopper hole 561; a connecting plate 57; and a lamp 571.

Detailed Description

In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.

As shown in fig. 1 to 11, the nut production process according to the present invention includes the following steps:

firstly, preparing an outer shell 1 and an embedded body 2, wherein the outer shell 1 and the embedded body 2 are made of different materials; a through hole 11 is formed in the outer shell 1; preferably, the outer shell 1 is made of steel, and the inlay 2 is made of polymer plastic or copper.

Secondly, the inner inlay 2 is fixedly arranged in the through hole 11 of the outer shell 1 to form a nut semi-finished product 3.

Thirdly, forming a screw hole 23 matched with the screw rod in the inner inlay 2; the outer shell 1 is machined to form the finished nut 4.

Thus, according to the nut production process, the nut is produced through the outer shell 1 and the inner inlay 2, the outer shell 1 and the inner inlay 2 are made of different materials, the inner inlay 2 can be made of a wear-resistant material with low resistance, and the outer layer is made of a material which is convenient to machine and has good structural strength. Thus, the two parts of the outer shell 1 and the inner inlay 2 respectively make full use of the excellent performance of the respective materials, so that the improved nut has better service performance and lower cost.

Preferably, in the step (r), when the outer shell 1 is prepared, an internal thread 111 is formed in the through hole 11 of the outer shell 1; when the inner inlay 2 is prepared, an external thread 21 is formed on the outer wall of the inner inlay 2; in the nut semi-finished product 3, the embedded body 2 is connected with the outer shell 1 through threads. By forming the external thread 21 on the outer shell 1 in advance, the internal thread 111 is formed on the inner inlay 2, so that the outer shell 1 and the inner inlay 2 can be connected by the thread, thereby preliminarily defining the positional relationship between the inner inlay 2 and the outer shell 1. Further, the end portion of the outer shell 1 is spin-formed into the abutting portion 13 by the spinning device 5, thus restricting the movement of the inlay 2 in the axial direction. Thus, the inner inlay 2 is firmly fixed and arranged in the outer shell 1.

Preferably, the inlay 2 in the step (r) is formed with a central hole 22, and the upper edge of the central hole 22 is formed with a driving hole 221 for driving the inlay 2 to rotate; the central hole 22 is used for machining the screw hole 23 in the step (iii). The tip of centre bore 22 is provided with drive hole 221, through with the drive that drive hole 221 complex spin chuck 512 can be convenient inlay 2 for shell body 1 rotates to realize inlay 2 with shell body 1's threaded connection. Preferably, the maximum distance between the edge of the driving hole 221 and the central hole 22 is smaller than the small diameter of the formed screw hole 23. The driving hole 221 of the central hole 22 can be removed when the screw hole 23 of the inlay 2 is formed.

Further, the machining of the outer housing 1 in step (iii) includes machining a threaded section 12 in the outer wall of the outer housing 1.

Preferably, the step two also comprises the step of spinning the end part of the outer shell 1 by using the spinning device 5, and a butting part 13 is formed at the end part of the outer shell 1, and the butting part 13 tightly butts and embeds the inner inlay 2 in the outer shell 1. Therefore, the inner inlay 2 and the outer shell 1 are further abutted tightly by the abutting part 13 formed by spinning in the spinning process, the inner inlay 2 is tightly contacted with the outer shell 1 along with the abutting part 13 after spinning, an integral structure is formed, and the inner inlay 2 and the outer shell 1 cannot move relatively.

Preferably, in the step (i), a limit step 14 is arranged in the through hole 11 of the prepared outer shell 1, and in the step (ii), one end of the embedded body 2 abuts against the limit step 14. Through setting up spacing step 14, inlay 2 and one end can be spacing through spacing step 14 for inlay 2 with when shell body 1 carries out threaded connection, rotatory to deepest department inlay 2 with spacing step 14 supports to push up spacingly.

Preferably, the spinning device 5 comprises a base 51, a spindle box 511, a rotating chuck 512, a moving table 52, a spinning head 53 and a resisting mechanism, wherein the spindle box 511 is connected to the base 51, and the rotating chuck 512 is rotatably connected to the spindle box 511; a sliding rail 513 is arranged on the base 51, and the mobile station 52 is slidably arranged on the sliding rail 513; the base 51 is provided with a transverse driving mechanism for driving the moving table 52 to move; the abutting mechanism is installed on the moving table 52, and the spinning head 53 is arranged on the abutting mechanism;

when in use, the outer shell 1 of the nut semi-finished product 3 is fixedly arranged on the rotating chuck 512 to rotate, and the spinning head 53 and the abutting mechanism approach to the nut semi-finished product 3 along with the moving table 52; the abutting portion 13 is formed as the abutting mechanism performs spinning of the spinning head 53 toward the end of the outer shell 1 away from the spin chuck 512. The position of the moving table 52 on the sliding rail 513 can be conveniently adjusted through the transverse moving mechanism, so that the relative position between the spinning head 53 and the outer shell 1 is adjusted, and the spinning head 53 is in abutting contact with the end part of the outer shell 1 through the abutting of the abutting mechanism, so that the spinning action is completed to form the abutting part 13.

Preferably, the abutting mechanism includes a hydraulic cylinder 54, and a control button 541 for controlling the hydraulic cylinder 54 to extend and retract is further disposed on the spindle box 511. The extension or retraction of the hydraulic cylinder 54 is controlled by pressing a control button 541. The control buttons 541 include an extend button, a retract button, and an emergency stop button.

Preferably, as shown in fig. 7, during spinning, the rotating chuck 512 rotates the outer shell 1 in the opposite direction to the screwing direction of the inner inlay 2 on the outer shell 1. As shown in fig. 7, the locking direction of the inlay 2 is counterclockwise, and the direction in which the outer shell 1 is rotated by the spin chuck 512 is clockwise. Like this spin chuck 512 drives when shell body 1 rotates, inlay 2 can produce because inertia and to the tendency of screwing up the direction pivoted, avoids inlay 2 pine to take off. When the spinning head 53 spins the outer shell 1, the spinning force of the spinning head 53 also generates an acting force in the screwing direction on the inner inlay 2, so that the inner inlay 2 is more stably connected with the outer shell 1.

Preferably, the lateral driving mechanism includes a driving screw 551 rotatably provided on the base 51; the driving screw 551 is arranged in parallel with the slide rail 513; the moving table 52 is provided at the bottom thereof with a driving nut 553 threadedly coupled to the driving screw 551, and the end of the driving screw 551 is further provided with a driving wheel 552. In use, the driving wheel 552 is rotated forward or backward manually to drive the driving screw 551 to rotate. Thereby enabling the moving stage 52 to move along the slide 513.

Preferably, a limit screw 521 is fixedly connected to the moving table 52, and the limit screw 521 is arranged in parallel with the sliding rail 513; a limiting column 56 is arranged on the base 51, a limiting hole 561 is arranged on the limiting column 56, and the limiting screw 521 passes through the limiting hole 561; a first limit wheel 522 and a second limit wheel 523 are respectively in threaded connection with the limit screw 521 at two sides of the limit hole 561. In this way, the positions of the first limiting wheel 522 and the second limiting wheel 523 on the limiting screw 521 are adjusted, so that the moving range of the mobile station 52 on the sliding rail 513 can be limited, and accidents caused by the fact that the spinning head 53 accidentally touches the spin chuck 512 due to misoperation of workers are avoided.

Preferably, the spindle box 511 and the upper end of the limit column 56 are connected with a connecting plate 57, and an illuminating lamp 571 is arranged on the connecting plate 57. The illuminating lamp 571 is provided with a universal supporting lamp tube, and workers can observe the operation condition at the edge of the illuminating lamp 571, so that the production safety is ensured.

Compared with the prior art, the invention adopts the mode that the inlay 2 is embedded in the outer shell 1, so that the performance of materials can be fully utilized by the transmission nut, and the quality and the cost of the transmission nut are balanced. The tight connection of the embedded body 2 and the outer shell 1 is realized through a spinning process, so that the embedded body 2 and the outer shell 1 are integrally fixed, the processing process is simple, the cost is low, and the competitiveness of a nut product is further improved.

The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present invention.

Claims

1. The nut production process is characterized by comprising the following steps:

firstly, preparing an outer shell and an inner embedded body, wherein the outer shell and the inner embedded body are made of different materials; a through hole is formed in the outer shell; when the outer shell is prepared, forming internal threads in the through hole of the outer shell; when the inlay is prepared, external threads are formed on the outer wall of the inlay; in the semi-finished nut product, the inner inlay is connected with the outer shell through threads;

forming a screw hole matched with the screw rod in the inner inlay; machining the outer shell to form a nut finished product;

the outer shell is made of steel, and the inner inlay is made of polymer plastic or copper; forming a central hole on the inlay body in the step I, and forming a driving hole for driving the inlay body to rotate on the upper edge of the central hole; and the central hole is used for processing a screw hole in the step III.

2. A process for producing a nut as claimed in claim 1, wherein the maximum distance between the edge of the driving hole and the central hole is smaller than the minor diameter of the formed threaded hole.

3. The nut production process according to claim 1, wherein the second step includes spinning the end of the outer shell by using a spinning device and forming an abutting portion at the end of the outer shell, wherein the abutting portion tightly abuts and embeds the inner inlay in the outer shell; and secondly, one end of the inlay body abuts against the limiting step.

4. A process for producing a nut as claimed in claim 1, wherein the machining of the outer shell in step (iii) includes machining a threaded section in the outer wall of the outer shell.