CN110303308B

CN110303308B - Production process of nut tube

Info

Publication number: CN110303308B
Application number: CN201910701865.3A
Authority: CN
Inventors: 张泽峰
Original assignee: Chongqing Yuankuo Machinery Co ltd
Current assignee: Chongqing Yuankuo Machinery Co ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2020-06-12
Anticipated expiration: 2039-07-31
Also published as: CN110303308A

Abstract

The invention relates to the technical field of nut pipe production equipment, in particular to a nut pipe production process, which is used for processing steel into the shape of a nut pipe by various process means such as cutting, milling, cold heading, drilling, tapping and the like. This scheme of adoption enables batch production nut pipe, has solved prior art drill bit wearing and tearing great technical problem when driling to the quarter butt.

Description

Production process of nut tube

Technical Field

The invention relates to the technical field of nut pipe production equipment, in particular to a nut pipe production process.

Background

Nut pipe is widely used in industrial production and daily life as a relatively common fastener, so the quality of nut pipe influences the quality of many equipment in production life. In the prior art, generally, a steel material is cut into a certain length and then is processed by drilling, tapping and the like, but the prior art has the following problems: 1) the steel cutting device special for processing the nut pipe is not available, and the steel for processing the nut pipe is difficult to be cut into the same length; 2) the cutting device in the prior art fixes the steel after moving the steel to the required length, then cuts the steel, loosens the steel after cutting, then moves the steel for a certain distance, and fixes and cuts the steel again, so that the operation is troublesome, and the cutting efficiency is low; 3) when the prior art drills a short rod, the situation that the drill bit is seriously abraded due to serious heating of the drill bit easily occurs.

Disclosure of Invention

The invention aims to provide a production process of a nut tube, and the production process is used for solving the technical problem that a drill bit is abraded greatly when a short rod is drilled in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: a production process of a nut tube comprises the following steps:

step A, cutting: cutting the steel into short rods with certain length by adopting a cutting device;

b, milling: milling a section of the fastening cap at the upper end of the short rod, and milling a connecting part of the section of the fastening cap and the short rod to form a transition fillet;

step C, cold heading: fixing the lower end of the short rod, and forming a fastening cap second section at the connecting part of the fastening cap first section and the short rod through a cold pier, wherein the outer diameter of the fastening cap second section is twice of that of the short rod;

step D, primary drilling: the upper end of the first section of the fastening cap and the lower end of the short rod are subjected to sample punching respectively, and then a first blind hole is drilled on the first section of the fastening cap along the axial direction by adopting a drill bit, so that the lower end of the first blind hole is flush with the upper surface of the second section of the fastening cap; then, drilling a second blind hole on the short rod along the axial direction by using a drill bit, wherein the second blind hole is coaxial with the first blind hole; drilling a first stage of the second blind hole, wherein the depth of the first stage of the second blind hole is the length of the required thread; drilling a second blind hole, wherein a certain distance is reserved between the top of the second blind hole and the bottom of the first blind hole, so that a hollow rod is formed;

step E, tapping: processing internal threads in the first blind hole stage to form an internal thread hollow screw;

step F, secondary drilling: and continuously drilling to enable the first blind hole to be communicated with the second blind hole to form a through hole.

The principle and the advantages of the scheme are as follows: 1) according to the scheme, before drilling, the sample is punched, so that the drill bit can be centered, and the condition of deflection during drilling is avoided;

2) this scheme is when getting the second blind hole drilling, divides two batches to accomplish, is favorable to discharging the sweeps that the drilling produced, has also avoided the drill bit to drill for a long time and has generated heat and seriously lead to the serious condition of drill bit wearing and tearing.

Preferably, as an improvement, the cutting device comprises a frame and a fixing mechanism, the fixing mechanism comprises a fixing base and a fixing claw which are fixed to each other, the fixing claw comprises a first fixing claw, a second fixing claw and an annular concave portion, the first fixing claw and the second fixing claw are respectively and fixedly arranged at two ends of the annular concave portion, and the lower end of the annular concave portion is fixed to the fixing base; the first fixed claw is an air bag, an inflating mechanism is fixedly arranged on the rack, and the inflating mechanism is communicated with the first fixed claw.

According to the scheme, the fixing claw is divided into the first fixing claw, the second fixing claw and the annular concave part, so that the fixing claw can provide at least three acting points for steel, the steel can be fixed at the same axial lead, and the steel is prevented from deflecting in the cutting process; the first fixing claw in the scheme adopts the air bag, so that the abrasion to steel materials when the steel materials are fixed is reduced, and firstly, the air bag is soft and is not easy to damage the steel materials; secondly, the user can adjust the inflation volume of first stationary dog, makes the stationary dog be fit for the diameter size of the steel that needs the cutting for the extrusion force that steel provided, also makes this scheme be applicable to the steel of different diameters size simultaneously

Preferably, as an improvement, an air flow channel is arranged in the annular concave part, one end of the air flow channel is communicated with the inflating mechanism, and the other end of the air flow channel is communicated with the first fixing claw.

This scheme provides the transfer for inflating the connection of mechanism and first stationary dog through set up airflow channel in the annular concave part, and when having avoided inflating the mechanism and directly linking to each other with first stationary dog, first stationary dog receives the influence of the gravity of inflating the mechanism and takes place the condition of deflecting.

Preferably, as an improvement, the inflation mechanism comprises a sealing cylinder, a piston is connected in the sealing cylinder in a sliding mode, a driving rod is fixedly arranged on the piston, and the sealing cylinder is communicated with the first fixing claw through a hose.

This scheme adopts sealed jar and piston commonly used to realize the purpose of aerifing for first stationary dog, simple structure and convenient to use.

Preferably, as an improvement, the frame is provided with two fixed claws with the same structure along the length direction, and the sealing cylinder is respectively communicated with the two fixed claws.

According to the scheme, the steel is fixed through the two fixing claws, so that the condition that the steel cannot deflect is further ensured, and the steel can be kept in a stable state in the cutting process; and the sealed jar is linked together with two stationary dogs respectively and makes two stationary dogs the effort that provides for steel the same, compares in prior art the condition of adjusting two fixed establishment respectively, and this scheme has avoided the uneven condition of steel atress.

Preferably, as an improvement, the frame is slided and is equipped with the limiting plate, and the limiting plate is fixed with the actuating lever.

According to the scheme, the limiting plate has an extending effect on the area of the free end of the driving rod, so that a user can apply force more easily when extruding the driving rod, and the piston can slide conveniently; meanwhile, the limiting plate is connected with the rack in a sliding mode, so that the sliding track of the driving rod is limited, the driving rod can only drive the piston to axially slide, and the condition that the piston is deviated and inclined is avoided.

Preferably, as an improvement, plastic pads are fixed to the second fixing claws and the annular concave portion.

This scheme has avoided fixed in-process, and when steel and second stationary dog or with support tightly excessively between the annular concave part, cause the condition of damage to steel global.

Preferably, as an improvement, still include cutting mechanism, the fixed stand that is equipped with in the frame, cutting mechanism sliding connection is on the stand, and cutting mechanism is located the upside of limiting plate.

This scheme sets up cutting mechanism and fixed establishment in same frame, and the relative positioning of the cutting mechanism and fixed establishment of being convenient for, simultaneously, this scheme locates the upside of limiting plate with cutting mechanism for the limiting plate can be used for carrying on spacingly to steel, thereby realizes making every certain length that advances of steel, can drive limiting plate and piston and advance certain length, and then with the gaseous crowded first stationary dog of income of corresponding volume in, the realization carries out the purpose fixed to steel.

Preferably, as a refinement, the circular center angle corresponding to the annular recess is 90 ° to 130 °.

This scheme makes and can open enough big opening between first stationary dog and the second stationary dog, is convenient for putting into or taking out of steel.

Preferably, as an improvement, an adjusting mechanism for adjusting the stroke of the piston is arranged in the sealing cylinder.

The scheme ensures that the stroke of the piston in the sealing cylinder is limited, so that the fixing mechanism can be suitable for steel products with different diameters.

Drawings

Fig. 1 is a schematic structural diagram of a cutting device used in an embodiment of a nut tube production process according to the present invention.

Fig. 2 is a cross-sectional view of a fixing mechanism according to a first embodiment of the present invention, the cross-sectional view being taken along the direction a-a in fig. 1.

Fig. 3 is an enlarged view of the inflation mechanism of fig. 1.

FIG. 4 is a front view of a short bar according to an embodiment of the present invention.

Fig. 5 is a front view of a short rod with a section of a fastening cap milled out.

FIG. 6 is a front view of a short bar after cold heading according to an embodiment of the present invention.

FIG. 7 is a front cross-sectional view of a hollow pole formed by a single drilling of a short pole in accordance with an embodiment of the present invention.

FIG. 8 is a sectional view of a hollow threaded internally threaded screw formed by threading a short shaft in accordance with one embodiment of the present invention.

FIG. 9 is a cross-sectional view of a nut tube formed by secondary drilling of a short rod in accordance with an embodiment of the present invention.

Fig. 10 is a sectional view of a sealing cylinder according to a second embodiment of the present invention, the sectional view being taken along the direction B-B in fig. 3.

Fig. 11 is a sectional view taken along the direction C-C of fig. 10.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a rack 1, a fixed base 2, a first fixed claw 3, a second fixed claw 4, an annular concave part 5, a sealing cylinder 6, a piston 7, a pressure spring 8, a limiting block 9, a driving rod 10, a limiting plate 11, a hose 12, an airflow channel 13, a stand column 14, a motor 15, a cutting blade 16, an electric push rod 17, an axial sliding groove 18, a circumferential sliding groove 19, a short rod 20, a first fastening cap section 21, a transition fillet 22, a second fastening cap section 23, a sample punching hole 24, a first blind hole 25, a first second blind hole stage 26, a second blind hole stage 27 and a hollow rod 28.

Example one

The production process of the nut tube is characterized by comprising the following steps of:

step A, cutting: a short bar 20 shown in fig. 4 for cutting the steel material into a predetermined length by a cutting device; as shown in fig. 1 and 2, the cutting device includes a frame 1 and a fixing mechanism, the fixing mechanism includes a fixing base 2 and a fixing claw welded and fixed to each other, here, as shown in fig. 1, two fixing claws having the same structure are provided on the frame 1 along the length direction, and the following description will be given taking the fixing claw on the left side as an example. As shown in fig. 2, the fixed claws include a first fixed claw 3, a second fixed claw 4 and an annular concave portion 5, and for convenience of explanation, the fixed claw is named as the first fixed claw 3 on the left side of the annular concave portion 5 and the second fixed claw 4 on the right side, the second fixed claw 4 is made of a hard material, and the second fixed claw 4 is fixed to the right end of the annular concave portion 5 by a bolt; the first fixed claw 3 is an air bag, and the first fixed claw 3 is fixed at the left end of the annular concave part 5 in an adhesive mode; the annular recess 5 is an incomplete ring, and the central angle corresponding to the annular recess 5 is 90-130 degrees, here, 125 degrees is taken as an example for explanation; the lower end of the annular concave part 5 is welded with the fixed base 2, and plastic pads are fixed on the second fixed claw 4 and one surface of the annular concave part 5 facing the workpiece in an adhering mode. The lengths of the first fixing jaw 3 and the second fixing jaw 4 in the longitudinal direction of the steel material are 5 to 15cm, and 10cm is exemplified here. The right side of the first fixed claw 3 is provided with a first groove for accommodating a workpiece, the left side of the second fixed claw 4 is provided with a second groove, the radiuses of the upper surface of the annular concave part 5, the first groove and the second groove are the same, and the upper surface of the annular concave part 5, the first groove and the second groove can be combined into a circular clamping hole.

An inflation mechanism is fixed on the rack 1 through a bolt, the inflation mechanism comprises a sealing cylinder 6, the sealing cylinder 6 is fixed with the rack 1 through a bolt, as shown in fig. 3, a piston 7 is connected with the sealing cylinder 6 in a horizontal sliding manner, a sealing space is formed between the right end face of the piston 7 and the bottom of the sealing cylinder 6, a pressure spring 8 is fixedly welded on the right end face of the piston 7, and the right end of the pressure spring 8 is abutted against the bottom of the sealing cylinder 6; a limiting block 9 for preventing the piston 7 from sliding out of the sealing cylinder 6 and falling off is fixedly welded on the inner peripheral wall of the sealing cylinder 6, and the limiting block 9 is positioned on the left side of the piston 7; a driving rod 10 is fixedly clamped on the left end face of the piston 7, a limiting plate 11 is connected to the rack 1 in a sliding mode through a sliding chute, the limiting plate 11 is located on the left side of the driving rod 10, and the limiting plate 11 is fixedly clamped with the left end of the driving rod 10; the sealed space is communicated with the first fixed claw 3 through a hose 12, specifically, an airflow channel 13 is formed in the annular concave part 5, the upper end of the airflow channel 13 is communicated with the first fixed claw 3, the lower end of the airflow channel 13 is communicated with the hose 12, and as shown in fig. 1, the hoses 12 on the two fixed claws are converged and then communicated with the sealed space in the sealed cylinder 6.

As shown in fig. 1, a cutting device is used in nut pipe production still includes cutting mechanism, and cutting mechanism is located the upside of limiting plate 11, and bolt fixedly connected with stand 14 is passed through to the right-hand member position of frame 1, and cutting mechanism passes through electric putter 17 sliding connection on stand 14, specifically sets up as follows: the cutting mechanism comprises a motor 15 and a cutting blade 16, an output shaft of the motor 15 and the cutting blade 16 are clamped and fixed with each other, and the plane of the cutting blade 16 is parallel to the plane of the limiting plate 11; the upper end of the electric push rod 17 is fixed with the upright post 14 through a bolt, and the lower end of the electric push rod 17 is fixed with the motor 15 through a bolt.

When cutting, as shown in fig. 1, the steel that will need the cutting is gone into between first stationary dog 3 and the second stationary dog 4 to the card, promote steel right, after steel moved to the position of limiting plate 11 to the right, when continuing to promote steel, steel can drive limiting plate 11 and move right together, limiting plate 11 drives actuating lever 10 and piston 7 and slides right, make the atmospheric pressure increase of 6 right-hand members of sealed jar, and then make the gas of 6 right-hand members of sealed jar crowd into first stationary dog 3 through hose 12 in, make 3 internal gas pressure increases of first stationary dog and realize the fixed to steel, thereby realized after steel moved the certain distance to the right side, the automatic mesh of fixing steel that carries out.

After the steel is fixed, the driving motor 15 drives the motor 15 to drive the cutting blade 16 to rotate, and meanwhile, the electric push rod 17 is controlled to gradually move downwards, so that the steel is cut.

After the cutting is completed, the short rod 20 which is cut off falls down to the rack 1 under the action of gravity, the right end of the steel to be cut is shortened, and the limiting plate 11 is not extruded rightwards any more, so the piston 7 loses the rightwards acting force and can be restored leftwards under the action of the pressure spring 8, and therefore the air pressure in the sealing cylinder 6 is reduced, the air in the first fixing claw 3 is sucked into the sealing cylinder 6, and the purpose that the steel is loosened automatically by the fixing mechanism after the cutting is completed is achieved.

Therefore, the scheme can automatically fix and loosen the steel, and solves the problems of multiple operation steps and low working efficiency caused by manual fixing and loosening; meanwhile, the problem that the acting force for fixing the steel is difficult to keep consistent when the steel is adjusted manually is avoided, so that the acting force for fixing the steel every time is the same and suitable; and the steel of this scheme promotes limiting plate 11 and removes the certain distance after, and is pressed from both sides tightly automatically, so this scheme still makes cutting blade 16 the same at every turn steel length that cuts off, has guaranteed the length requirement of the steel that cuts off.

B, milling: as shown in fig. 5, a section 21 of the fastening cap is milled at the upper end of the short rod 20, and a transition fillet 22 is milled at the connecting part of the section 21 of the fastening cap and the short rod 20;

step C, cold heading: as shown in fig. 6, the lower end of the short rod 20 is fixed, a fastening cap section 23 is formed at the connecting part of the fastening cap section 21 and the short rod 20 by cold heading, and the outer diameter of the fastening cap section 23 is twice of the outer diameter of the short rod 20;

step D, primary drilling: as shown in fig. 7, the upper end of the first section 21 of the fastening cap and the lower end of the short rod 20 are punched with the punching holes 24, and then a drill is used to axially drill a first blind hole 25 on the first section 21 of the fastening cap, so that the lower end of the first blind hole 25 is flush with the upper surface of the second section 23 of the fastening cap; then, drilling a second blind hole on the short rod 20 along the axial direction by using a drill bit, wherein the second blind hole is coaxial with the first blind hole 25; drilling a first stage 26 of the second blind hole, wherein the depth of the first stage 26 of the second blind hole is the length of the required thread; as shown in fig. 8, a second blind hole 27 is drilled, and a certain distance is left between the top of the second blind hole 27 and the bottom of the first blind hole 25, so as to form a hollow rod 28;

step E, tapping: as shown in fig. 8, an internal thread is processed in the first blind hole 26 to form an internal thread hollow screw;

step F, secondary drilling: as shown in fig. 9, the drilling is continued so that the first blind hole 25 and the second blind hole communicate with each other to form a through hole.

Example two

The difference between the first embodiment and the second embodiment is that the limiting block 9 is connected with the sealing cylinder 6 in a sliding manner, as shown in fig. 10 and 11, an axial sliding groove 18 and a circumferential sliding groove 19 which are perpendicular to each other are arranged on the inner circumferential wall of the sealing cylinder 6, the circumferential sliding groove 19 includes a plurality of grooves, and five grooves are shown in fig. 10; the five circumferential sliding grooves 19 are respectively communicated with the axial sliding groove 18, the five circumferential sliding grooves 19 are arranged in parallel, and the five circumferential sliding grooves 19 are distributed along the length direction of the axial sliding groove 18; as shown in fig. 5, the axial sliding groove 18 is a closed sliding groove with an opening width smaller than the width of the bottom of the sliding groove, so that the situation that the limiting block 9 slides down from the sliding groove can be avoided.

During specific implementation, the limiting block 9 slides into the axial sliding groove 18 along the circumferential sliding groove 19, then the limiting block 9 slides along the axial sliding groove 18, and after the limiting block 9 slides to a required position, the limiting block 9 slides into the circumferential sliding groove 19 along the circumferential sliding groove 19, so that the limiting block 9 is clamped with the circumferential sliding groove 19, and the limiting block 9 is prevented from axially moving in the sealing cylinder 6. The purpose of controlling the stroke of the piston 7 in the sealing cylinder 6 is thereby achieved.

The foregoing is merely an example of the present invention and common general knowledge in the art of designing and/or characterizing particular aspects and/or features is not described in any greater detail herein. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several variations and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

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

step F, secondary drilling: continuously drilling to enable the first blind hole to be communicated with the second blind hole to form a through hole;

the cutting device comprises a rack and a fixing mechanism, wherein the fixing mechanism comprises a fixing base and a fixing claw which are fixed with each other, the fixing claw comprises a first fixing claw, a second fixing claw and an annular concave part, the first fixing claw and the second fixing claw are respectively and fixedly arranged at two ends of the annular concave part, and the lower end of the annular concave part is fixed with the fixing base; the first fixed claw is an air bag, an inflating mechanism is fixedly arranged on the rack, and the inflating mechanism is communicated with the first fixed claw;

the inflation mechanism comprises a sealing cylinder, a piston is connected in the sealing cylinder in a sliding mode, a driving rod is fixedly arranged on the piston, and the sealing cylinder is communicated with the first fixing claw through a hose; limiting plates are arranged on the rack in a sliding mode, the limiting plates and the piston are respectively located at two ends of the driving rod, the limiting plates are located between the driving rod and the fixed base, the limiting plates are fixed with the driving rod, and the limiting plates are right opposite to the fixed base.

2. The process for producing a nut tube according to claim 1, wherein: an air flow channel is arranged in the annular concave part, one end of the air flow channel is communicated with the inflating mechanism, and the other end of the air flow channel is communicated with the first fixing claw.

3. The process for producing a nut tube according to claim 1, wherein: two fixing claws with the same structure are arranged on the rack along the length direction, and the sealing cylinder is respectively communicated with the two fixing claws.

4. The process for producing a nut tube according to claim 1, wherein: and plastic pads are fixed on the second fixing claws and the annular concave part.

5. The process for producing a nut tube according to claim 1, wherein: still include cutting mechanism, the fixed stand that is equipped with in the frame, cutting mechanism sliding connection is on the stand, and cutting mechanism is located the upside of limiting plate.

6. The process for producing a nut tube according to claim 1, wherein: the corresponding central angle of the annular concave part is 90-130 degrees.

7. The process for producing a nut tube according to claim 1, wherein: and an adjusting mechanism for adjusting the stroke of the piston is arranged in the sealing cylinder.