CN112475811A - Machining process of oil pipe joint - Google Patents
Machining process of oil pipe joint Download PDFInfo
- Publication number
- CN112475811A CN112475811A CN202011336640.1A CN202011336640A CN112475811A CN 112475811 A CN112475811 A CN 112475811A CN 202011336640 A CN202011336640 A CN 202011336640A CN 112475811 A CN112475811 A CN 112475811A
- Authority
- CN
- China
- Prior art keywords
- cold
- machining process
- cold heading
- outer diameter
- guide surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses a processing technology of an oil pipe joint, which comprises the steps of S1, blank treatment; s2.1, cutting into sections; s2.2, widening the outer diameter of the pipe fitting at one time; s2.3, secondarily widening the outer diameter of the pipe fitting; s2.4, widening the outer diameter of the pipe fitting for three times; s2.5, upsetting the upper port; and step S3, polishing and deburring, straightening the wire stock, cutting the wire stock into sections through a cold forming machine, expanding the outer diameter of the pipe fitting for three times through a first cold-heading die, a second cold-heading die and a third cold-heading die, finally performing upper port upsetting, and simultaneously discharging air in the dies through an exhaust assembly when the pipe fitting is extruded, so that the ejector pin can be better attached to the workpiece to extrude the workpiece. The invention has reasonable structure, adopts the cold heading process, leads the outer surface and the inner surface of the oil pipe joint obtained by processing to be smoother and finer by step processing, and improves the processing precision of the prefabricated product.
Description
Technical Field
The invention relates to the technical field of hydraulic pipe joint machining, in particular to a machining process of an oil pipe joint.
Background
The hydraulic pipe joint is a part for connecting a high-pressure oil pipe and a high-pressure oil pipe in a hydraulic system. The hydraulic pipe joint can be divided into a hydraulic hose, a high-pressure ball valve, a quick joint, a ferrule type pipe joint, a welded type pipe joint, a high-pressure hose, a transition type pipe joint, a ferrule type pipe joint, a three-way type pipe joint, a non-standard type pipe joint, a flared type pipe joint, a right-angle type pipe joint, a rotary type pipe joint, a quick joint, a stainless steel pipe joint and a copper joint. An automobile oil pipe joint is used for the joint of an engine oil conveying pipe.
At present, most of automobile oil pipe joints are machined by a milling machine and a lathe, on one hand, the efficiency is extremely low, and on the other hand, the inner surface and the outer surface of the oil pipe joint machined by the lathe are rough and uneven. The finished product after thread processing has low precision and poor matching degree with the connecting piece, and the problem of easy leakage is caused when the connecting piece is used for oil pipe connection.
Disclosure of Invention
The invention aims to provide a processing technology of an oil pipe joint, which adopts a cold heading technology, processes the outer surface step by step through extrusion during processing, and arranges an exhaust assembly during processing the inner surface so that the outer surface and the inner surface of the oil pipe joint obtained by processing are smoother and finer, thereby improving the processing precision of a prefabricated product.
The technical purpose of the invention is realized by the following technical scheme: the machining process of the oil pipe joint is characterized by comprising the following steps of: the method comprises the following steps: step S1, blank processing, namely straightening the coiled wire blank through a straightening device to obtain a straightening material; s2.1, cutting into sections, inserting the straightened material into a multi-station cold forming machine for cutting to obtain a cylindrical blank; s2.2, expanding the outer diameter of the pipe once, vertically rotating the cylindrical blank by 180 degrees through a manipulator, and then placing the cylindrical blank into a first cold-heading die, wherein the first cold-heading die comprises a first punching die part and a first main die part, the cylindrical blank is placed in the first main die part, the first punching die part moves towards the first main die part to extrude the cylindrical blank, an upper end hole I is formed in the center of the upper end face of the cylindrical blank, a first guide face is formed at the edge of the lower end face of the cylindrical blank, and the outer diameter of the cylindrical blank is increased in the extrusion process to obtain a first cold-heading piece; s2.3, widening the outer diameter of the pipe fitting for the second time, horizontally moving the primary cold heading piece into a second cold heading die through a manipulator, wherein the second cold heading die comprises a die part II and a main die part II, an extrusion hole is formed in the center of the bottom surface of the main die part II, a thimble is arranged in the center of the extrusion hole, an exhaust assembly is arranged on the thimble, the primary cold heading piece is extruded, the upper end hole I is further extruded into an upper end hole II, the guide surface I is further extruded into a guide surface II, the bottom of the primary cold heading piece is extruded into the extrusion hole, the thimble is extruded into a lower end hole I in the center of the bottom of the primary cold heading piece, and the outer diameter of the primary cold heading piece is increased in the extrusion process so as to obtain the secondary cold heading piece; s2.4, expanding the outer diameter of the pipe fitting for three times, horizontally moving the secondary cold heading piece into a third cold heading die through a manipulator, extruding the secondary cold heading piece, further extruding and forming an upper end hole II into an upper end hole III, further extruding and forming a guide surface II into a guide surface III, and increasing the outer diameter of the secondary cold heading piece in the extruding process to obtain a tertiary cold heading piece; s2.5, upsetting the upper port, horizontally moving the third cold-headed part into a fourth cold-headed die through a manipulator, extruding the third cold-headed part, deepening an upper end hole III to form an upper end hole IV, and extruding the guide surface III to form a guide surface IV to obtain a prefabricated cold-headed part; and step S3, grinding and deburring, wherein the inner surface and the outer surface of the prefabricated cold heading piece are ground and polished by using a grinding and polishing machine to obtain a prefabricated product.
Through above-mentioned technical scheme, the external diameter of pipe fitting is once widened, pipe fitting external diameter is widened once and pipe fitting external diameter is widened the third time and is widened extrusion widen gradually, and two preceding broadening ranges are less, widen for the third time and prepare. The gradual stepwise widening of the outer diameter of the pipe can result in a smoother and smoother outer surface. Set up the exhaust subassembly on the thimble during processing lower extreme hole, make two extrusion cold-heading piece in-process of die part arrange outside fast in will extruding the hole, prevent to extrude downthehole great atmospheric pressure of production and extrude the hole to once pressing in the cold-heading piece and cause the influence. The outer surface and the inner surface of the oil pipe joint obtained by processing are smoother and finer through the process, and the processing precision of the prefabricated product is improved.
The invention is further configured to: the outer diameter of the cylindrical blank in the step S2.1 is 15.5mm, the outer diameter of the primary cold heading piece in the step S2.2 is 16.5mm, the outer diameter of the secondary cold heading piece in the step S2.3 is 16.8mm, and the outer diameter of the tertiary cold heading piece in the step S2.4 is 19.8 mm.
By the technical scheme, the range of once widening the outer diameter of the pipe fitting and the range of secondarily widening the outer diameter of the pipe fitting are respectively 0.5mm and 0.3mm, the machining precision of the lower end part of the pipe fitting is ensured, the outer diameter of the pipe fitting is widened to a large extent after the lower end part of the pipe fitting is machined, and the range of three-time widening of the outer diameter of the pipe fitting is 3mm, so that the requirement on the outer diameter of the pipe fitting is approximately met.
The invention is further configured to: and the included angles between the first guide surface in the step S2.2, the second guide surface in the step S2.3, the third guide surface in the step S2.4 and the fourth guide surface in the step S2.5 and the horizontal plane are gradually reduced.
Through above-mentioned technical scheme, spigot surface one, spigot surface two, spigot surface three and spigot surface cross extrude for many times and diminish gradually, can guarantee the higher machining precision of spigot surface, and the contained angle between spigot surface and the horizontal plane reduces the in-process gradually, and the structural strength of spigot surface strengthens gradually.
The invention is further configured to: the included angle between the second guide surface and the horizontal plane in the step S2.3 is 40 degrees, the included angle between the third guide surface and the horizontal plane in the step S2.4 is 23 degrees, and the included angle between the fourth guide surface and the horizontal plane in the step S2.5 is 20 degrees.
Through above-mentioned technical scheme, when the contained angle between spigot surface and the horizontal plane is 20, the spigot surface has better structural strength and compressive property when having the guide effect, can increase the life of spigot surface
The invention is further configured to: the exhaust assembly in the step S2.3 comprises a plurality of first air outlet channels and a plurality of second air outlet channels, the second air outlet channels are located inside the ejector pins, the lower ends of the second air outlet channels are communicated with the bottom of the ejector pins, the first air outlet channels are obliquely arranged and surround the second air outlet channels, the upper ends of the first air outlet channels are communicated with the second air outlet channels, and the lower ends of the first air outlet channels are communicated with the extrusion holes.
Through above-mentioned technical scheme, outlet channel one is located the terminal surface of thimble outer wall and is oval, compares in the circular area that has more in an outlet channel cross section to once cold-heading piece is when extruding the hole in the extrusion, extrude downthehole air can discharge from outlet channel one more fast, prevent to produce atmospheric pressure between cold-heading piece and the second cold-heading mould once, influence cold-heading piece moulding in the second cold-heading mould once, thereby make cold-heading piece have more level and smooth machined surface, improve the machining precision. On the other hand, the first air outlet channel is arranged obliquely upwards, so that the phenomenon that impurities in the extrusion hole are accumulated at the port of the first air outlet channel to influence the exhaust effect of the first air outlet channel can be prevented.
The invention is further configured to: the inner diameter of the air outlet channel II is 3-5 times of the inner diameter of the air outlet channel I.
Through above-mentioned technical scheme, can be more smooth and easy when the air in the extrusion hole enters into air outlet channel two from a plurality of air outlet channel one.
The invention is further configured to: and S2.3, an exhaust channel is vertically formed in the position of the central line in the main mold part II, the upper end of the exhaust channel is communicated with the exhaust channel II, the lower end of the exhaust channel penetrates through the bottom surface of the main mold part II, an air guide hole penetrating through the exhaust channel and the side wall of the main mold part II is horizontally formed in the main mold part II, and the aperture of one end, located at the side wall of the main mold part II, of the air guide hole is smaller than that of one end, located at the exhaust channel.
Through the technical scheme, the principle of the air guide hole is the same as that of the venturi, even when air flows through the air guide hole, the air flow is thinned to accelerate the air flow rate, so that a low-pressure area is formed at the position, located at one end of the two side walls of the main die part, of the air guide hole, the low-pressure area can generate adsorption action and promote the air to flow, the air in the exhaust channel is continuously sucked into the air guide hole and exhausted under the action of the adsorption force, and therefore the air in the exhaust channel can be exhausted more quickly.
The invention is further configured to: the inner diameter of the exhaust channel is larger than the outer diameter of the ejector pin.
Through above-mentioned technical scheme, guarantee that the air can discharge to the external world through exhaust passage fast.
The invention is further configured to: the shapes of the first upper end hole in the step S2.2, the second upper end hole in the step S2.3 and the third upper end hole in the step S2.4 are all inverted round table shapes, the fourth upper end hole in the step S2.5 is cylindrical, and the edge of the upper end of the fourth upper end hole is provided with a chamfer.
Through the technical scheme, when the third cold-heading piece is pressed with the upper end hole four in the step S2.5, the fourth die part of the fourth cold-heading die can be more accurately pressed into the middle of the inverted round table shape at the upper end of the third cold-heading piece, and the inverted round table shape can play a certain guiding role.
The invention is further configured to: the depth of the upper end hole four in the step S2.5 is 12mm
Through the technical scheme, the upper end hole IV meets the processing requirement, and the depth is ensured to be 12 mm.
Drawings
FIG. 1 is a schematic flow diagram of the present invention;
FIG. 2 is a schematic view of a cylindrical blank according to the present invention;
FIG. 3 is a schematic structural view of a primary cold heading of the present invention;
FIG. 4 is a schematic structural view of a secondary cold heading of the invention;
FIG. 5 is a schematic structural view of a tertiary cold heading of the present invention;
fig. 6 is a schematic structural view of a pre-formed cold heading of the present invention.
The reference numbers in the figures mean: 1. a cylindrical blank; 2. a first upper end hole; 3. a first guide surface; 4. primary cold heading piece; 5. a second upper end hole; 6. a second guide surface; 7. a first lower end hole; 8. secondary cold heading piece; 9. a third upper end hole; 10. a third guide surface; 11. carrying out tertiary cold heading; 12. a fourth upper end hole; 13. a fourth guide surface; 14. and (5) prefabricating the cold heading piece.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The present invention is explained below with reference to fig. 1 to 6.
The machining process of the oil pipe joint is characterized by comprising the following steps of: the method comprises the following steps:
and step S1, processing a blank, wherein the blank adopted by the invention is a 20CrMnTi alloy steel material or a 30CrMnTi alloy steel material, and the 20CrMnTi alloy steel material or the 30CrMnTi alloy steel material has good processing performance, plasticity and higher surface quality. The method is mainly embodied in the cold heading forming process, and has the characteristics of large deformation and high forming speed. Under the condition of certain impact pressure, the shape which is the same as the structure in the cold heading die cavity is easier to form. And straightening the coiled wire stock by a straightening device to obtain a straightened material, and conveniently sending the straightened material into a multi-station cold forming machine for processing.
And S2.1, cutting into sections, inserting the straightening material into a multi-station cold forming machine for cutting to obtain a cylindrical blank, wherein the outer diameter of the cylindrical blank is 15.5mm, the cylindrical blank can be placed into a cold heading die for extrusion forming, and the cold heading piece formed by the method not only can reduce the raw material consumption by 10% -30% compared with lathe processing, but also has the advantages of high product size precision, good surface smoothness and high productivity.
And S2.2, widening the outer diameter of the pipe fitting once, vertically rotating the cylindrical blank by 180 degrees through a manipulator, and then putting the cylindrical blank into a first cold heading die. The first cold heading die comprises a first stamping part and a first main die part, wherein the cylindrical blank is placed in the first main die part, and the first stamping part moves towards the first main die part to extrude the cylindrical blank, so that the cylindrical blank is extruded and formed into the shape of the in-wall structure of the first cold heading die. Specifically, a first upper end hole is formed in the center of the upper end face of the cylindrical blank, and the first upper end hole is in an inverted round table shape. And forming a first guide surface on the edge of the lower end face of the cylindrical blank, and increasing the outer diameter of the cylindrical blank in the extrusion process to obtain a primary cold heading piece, wherein the outer diameter of the primary cold heading piece is 16.5 mm.
And S2.3, widening the outer diameter of the pipe fitting for the second time, taking the primary cold heading piece out of the first cold heading die through the manipulator, and horizontally moving the primary cold heading piece into the second cold heading die. The second cold heading die comprises a second die punching portion and a second main die portion, an extrusion hole is formed in the center of the bottom surface of the second main die portion, the diameter of the lower end face of the primary cold heading piece is larger than the outer diameter of the extrusion hole, and the primary cold heading piece is placed at the upper end of the bottom surface of the second main die portion and located above the extrusion hole. And the center of the extrusion hole is provided with a thimble, and the upper end surface of the thimble is flush with the bottom surface of the main die part II. Be provided with the exhaust subassembly on the thimble, the exhaust subassembly includes a plurality of outlet channel one and outlet channel two, and the internal diameter of outlet channel two is 3~5 times of the internal diameter of outlet channel one, and the internal diameter of outlet channel one is 0.5mm in this embodiment, and the internal diameter of outlet channel two is 2 mm. The second air outlet channel is located inside the ejector pin and is vertically arranged, the lower end of the second air outlet channel penetrates through the bottom of the ejector pin, and the upper end of the second air outlet channel extends to the position, close to the center of the ejector pin, inside the ejector pin. The first air outlet channels are obliquely arranged and surround the second air outlet channels, and the intervals between the adjacent first air outlet channels are the same. The upper end of the first air outlet channel penetrates through the upper end of the side wall of the second air outlet channel, and the lower end of the first air outlet channel penetrates through the side wall of the ejector pin and is communicated with the extrusion hole. The inclination of outlet channel one in this embodiment is 45, outlet channel one is located the terminal surface of thimble outer wall for oval on the one hand, compare in the circular area that has more of an outlet channel cross section, thereby once cold-heading piece is when extruding the hole in the extrusion, the air in the extrusion hole can be discharged from outlet channel one more fast, prevent to produce atmospheric pressure between cold-heading piece and the second cold-heading mould once, it is moulding in the second cold-heading mould to influence cold-heading piece once, thereby make cold-heading piece have more smooth machined surface, and the machining precision is improved. On the other hand, the first air outlet channel is arranged obliquely upwards, so that the phenomenon that impurities in the extrusion hole are accumulated at the port of the first air outlet channel to influence the exhaust effect of the first air outlet channel can be prevented.
And S2.3, vertically arranging an exhaust channel at the position of the inner center line of the second main die part, wherein the inner diameter of the exhaust channel is larger than the outer diameter of the ejector pin. The upper end of the exhaust channel is communicated with the second air outlet channel, the lower end of the exhaust channel penetrates through the bottom surface of the second main mold part, and air in the second air outlet channel can be rapidly exhausted outside through the exhaust channel. And air guide holes penetrating through the exhaust channel and the side walls of the two main mould parts are horizontally arranged in the two main mould parts, and the aperture of one end, positioned at the side wall of the two main mould parts, of each air guide hole is smaller than that of one end, positioned at the exhaust channel, of each air guide hole. The principle of the air guide hole is the same as that of the venturi, even when air flows through the air guide hole, the air flow is thinned to accelerate the air flow rate, so that a low-pressure area is formed at the position, located at one end of the two side walls of the main die part, of the air guide hole, the low-pressure area can generate an adsorption effect and promote the air to flow, the air in the exhaust channel is continuously sucked into the air guide hole and exhausted under the action of the adsorption effect, and therefore the air in the exhaust channel can be exhausted more quickly.
And the first upper end hole is further extruded into a second upper end hole by the second die punching part through extruding the first cold heading piece, and the second upper end hole is in an inverted round table shape. The first guide surface is further extruded and formed into a second guide surface, and the included angle between the second guide surface and the horizontal plane is 40 degrees. The bottom of the primary cold heading piece is extruded into the extrusion hole, and a first lower end hole is extruded and formed by the ejector pin at the central position of the primary cold heading piece. The outer diameter of the primary cold heading piece is increased in the extrusion process, and a secondary cold heading piece is obtained at the moment, wherein the outer diameter of the secondary cold heading piece is 16.8 mm.
And S2.4, widening the outer diameter of the pipe fitting for three times, taking out the secondary cold heading piece from the second cold heading die through the manipulator, translating and putting the secondary cold heading piece into the third cold heading die. The third cold heading die comprises a third die punching portion and a third main die portion, and the secondary cold heading piece is vertically placed in the third main die portion. And a pressing rod is arranged at the center of the bottom of the main die part III and is positioned in the first lower end hole punched by the thimble in the step S2.3. And extruding the secondary cold heading piece through the punch part III to further extrude the upper end hole II into an upper end hole III, wherein the upper end hole III is in an inverted round table shape, and the depth of the upper end opening III is 1.5 mm. And further extruding and forming the guide surface II into a guide surface III, wherein the included angle between the guide surface III and the horizontal plane is 23 degrees. And the external diameter of the secondary cold heading piece is increased in the extrusion process, and the increase amplitude is larger than that of the secondary cold heading piece twice, so that a tertiary cold heading piece is obtained, and the external diameter of the tertiary cold heading piece is 19.8 mm.
And S2.5, upsetting the upper port deeply, taking out the tertiary cold-heading piece from the third cold-heading die through the manipulator, translating the tertiary cold-heading piece and putting the tertiary cold-heading piece into the fourth cold-heading die. The fourth cold heading die comprises a die stamping part IV and a main die part IV, and the third cold heading piece is vertically placed in the main die part IV. And extruding the three-time cold heading piece through the die part IV to deepen the depth of the upper end hole III and form the upper end hole IV, wherein the upper end hole IV is cylindrical, the depth of the upper end hole IV is 12mm, and the edge of the upper end hole IV is provided with a chamfer. And the guide surface III is further extruded into a guide surface IV in the cold heading process, and the included angle between the guide surface IV and the horizontal plane is 20 degrees. And (4) performing the four stamping processes to obtain the prefabricated cold heading piece.
And step S3, grinding and deburring, namely grinding and polishing the inner surface and the outer surface of the prefabricated cold heading piece by using a grinding and polishing machine, and removing burrs and impurities remained on the surface of the prefabricated cold heading piece to make the prefabricated cold heading piece smoother so as to obtain a prefabricated product. The HRC value of the prefabricated product is 17-25, the prefabricated product has proper elasticity, can prevent the engine from loosening and pipe explosion due to slight vibration, and has a certain anti-falling effect.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and those modifications and variations assumed in the above are also considered to be within the protective scope of the present invention.
Claims (10)
1. The machining process of the oil pipe joint is characterized by comprising the following steps of: the method comprises the following steps:
step S1, blank processing, namely straightening the coiled wire blank through a straightening device to obtain a straightening material;
s2.1, cutting into sections, inserting the straightened material into a multi-station cold forming machine for cutting to obtain a cylindrical blank;
s2.2, expanding the outer diameter of the pipe once, vertically rotating the cylindrical blank by 180 degrees through a manipulator, and then placing the cylindrical blank into a first cold-heading die, wherein the first cold-heading die comprises a first punching die part and a first main die part, the cylindrical blank is placed in the first main die part, the first punching die part moves towards the first main die part to extrude the cylindrical blank, an upper end hole I is formed in the center of the upper end face of the cylindrical blank, a first guide face is formed at the edge of the lower end face of the cylindrical blank, and the outer diameter of the cylindrical blank is increased in the extrusion process to obtain a first cold-heading piece;
s2.3, widening the outer diameter of the pipe fitting for the second time, horizontally moving the primary cold heading piece into a second cold heading die through a manipulator, wherein the second cold heading die comprises a die part II and a main die part II, an extrusion hole is formed in the center of the bottom surface of the main die part II, a thimble is arranged in the center of the extrusion hole, an exhaust assembly is arranged on the thimble, the primary cold heading piece is extruded, the upper end hole I is further extruded into an upper end hole II, the guide surface I is further extruded into a guide surface II, the bottom of the primary cold heading piece is extruded into the extrusion hole, the thimble is extruded into a lower end hole I in the center of the bottom of the primary cold heading piece, and the outer diameter of the primary cold heading piece is increased in the extrusion process so as to obtain the secondary cold heading piece;
s2.4, expanding the outer diameter of the pipe fitting for three times, horizontally moving the secondary cold heading piece into a third cold heading die through a manipulator, extruding the secondary cold heading piece, further extruding and forming an upper end hole II into an upper end hole III, further extruding and forming a guide surface II into a guide surface III, and increasing the outer diameter of the secondary cold heading piece in the extruding process to obtain a tertiary cold heading piece;
s2.5, upsetting the upper port, horizontally moving the third cold-headed part into a fourth cold-headed die through a manipulator, extruding the third cold-headed part, deepening an upper end hole III to form an upper end hole IV, and extruding the guide surface III to form a guide surface IV to obtain a prefabricated cold-headed part;
and step S3, grinding and deburring, wherein the inner surface and the outer surface of the prefabricated cold heading piece are ground and polished by using a grinding and polishing machine to obtain a prefabricated product.
2. The machining process of the oil pipe joint as claimed in claim 1, wherein the machining process comprises the following steps: the outer diameter of the cylindrical blank in the step S2.1 is 15.5mm, the outer diameter of the primary cold heading piece in the step S2.2 is 16.5mm, the outer diameter of the secondary cold heading piece in the step S2.3 is 16.8mm, and the outer diameter of the tertiary cold heading piece in the step S2.4 is 19.8 mm.
3. The machining process of the oil pipe joint as claimed in claim 1, wherein the machining process comprises the following steps: and the included angles between the first guide surface in the step S2.2, the second guide surface in the step S2.3, the third guide surface in the step S2.4 and the fourth guide surface in the step S2.5 and the horizontal plane are gradually reduced.
4. The machining process of the oil pipe joint as claimed in claim 2, wherein the machining process comprises the following steps: the included angle between the second guide surface and the horizontal plane in the step S2.3 is 40 degrees, the included angle between the third guide surface and the horizontal plane in the step S2.4 is 23 degrees, and the included angle between the fourth guide surface and the horizontal plane in the step S2.5 is 20 degrees.
5. The machining process of the oil pipe joint as claimed in claim 1, wherein the machining process comprises the following steps: the exhaust assembly in the step S2.3 comprises a plurality of first air outlet channels and a plurality of second air outlet channels, the second air outlet channels are located inside the ejector pins, the lower ends of the second air outlet channels are communicated with the bottom of the ejector pins, the first air outlet channels are obliquely arranged and surround the second air outlet channels, the upper ends of the first air outlet channels are communicated with the second air outlet channels, and the lower ends of the first air outlet channels are communicated with the extrusion holes.
6. The machining process of the oil pipe joint as claimed in claim 5, wherein the machining process comprises the following steps: the inner diameter of the air outlet channel II is 3-5 times of the inner diameter of the air outlet channel I.
7. The machining process of the oil pipe joint as claimed in claim 5, wherein the machining process comprises the following steps: and S2.3, an exhaust channel is vertically formed in the position of the central line in the main mold part II, the upper end of the exhaust channel is communicated with the exhaust channel II, the lower end of the exhaust channel penetrates through the bottom surface of the main mold part II, an air guide hole penetrating through the exhaust channel and the side wall of the main mold part II is horizontally formed in the main mold part II, and the aperture of one end, located at the side wall of the main mold part II, of the air guide hole is smaller than that of one end, located at the exhaust channel.
8. The machining process of the oil pipe joint as claimed in claim 7, wherein the machining process comprises the following steps: the inner diameter of the exhaust channel is larger than the outer diameter of the ejector pin.
9. The machining process of the oil pipe joint as claimed in claim 1, wherein the machining process comprises the following steps: the shapes of the first upper end hole in the step S2.2, the second upper end hole in the step S2.3 and the third upper end hole in the step S2.4 are all inverted round table shapes, the fourth upper end hole in the step S2.5 is cylindrical, and the edge of the upper end of the fourth upper end hole is provided with a chamfer.
10. The machining process of the oil pipe joint as claimed in claim 9, wherein the machining process comprises the following steps: the depth of the upper end hole four in the step S2.5 is 12 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011336640.1A CN112475811B (en) | 2020-11-25 | 2020-11-25 | Machining process of oil pipe joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011336640.1A CN112475811B (en) | 2020-11-25 | 2020-11-25 | Machining process of oil pipe joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112475811A true CN112475811A (en) | 2021-03-12 |
| CN112475811B CN112475811B (en) | 2022-09-16 |
Family
ID=74934238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011336640.1A Active CN112475811B (en) | 2020-11-25 | 2020-11-25 | Machining process of oil pipe joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112475811B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1465810A (en) * | 1965-01-18 | 1967-01-13 | Hughes Aircraft Co | Closed-cycle cryogenic refrigeration apparatus |
| KR20070106202A (en) * | 2006-04-28 | 2007-11-01 | 태양금속공업주식회사 | Mold for cold forging |
| CN106378632A (en) * | 2016-10-19 | 2017-02-08 | 扬州星月燃油喷射有限公司 | Precise forming mechanism of oil pump oil mouth plunger sleeve |
| CN206997658U (en) * | 2017-07-07 | 2018-02-13 | 嘉兴耐思得模具科技有限公司 | A kind of gas extraction system of cold upsetting die of car |
| CN207839993U (en) * | 2017-11-10 | 2018-09-11 | 宾科汽车紧固件（昆山）有限公司 | Turbocharger bypass switch screw cold upsetting die of car |
| CN108555200A (en) * | 2018-01-12 | 2018-09-21 | 上海裴椒汽车部件制造有限公司 | A kind of oil connection cold heading technique and its cold upsetting die of car |
| CN208853636U (en) * | 2018-04-04 | 2019-05-14 | 东莞市力胜模具有限公司 | A kind of screw punch pin |
| CN210359080U (en) * | 2019-08-27 | 2020-04-21 | 苏州工业园区新凯精密五金有限公司 | Cold-heading module of forming welded nut |
| CN211539351U (en) * | 2019-10-09 | 2020-09-22 | 宁波清熙金属智能科技有限公司 | Bolt cold-heading mould that cooling performance is good |
-
2020
- 2020-11-25 CN CN202011336640.1A patent/CN112475811B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1465810A (en) * | 1965-01-18 | 1967-01-13 | Hughes Aircraft Co | Closed-cycle cryogenic refrigeration apparatus |
| KR20070106202A (en) * | 2006-04-28 | 2007-11-01 | 태양금속공업주식회사 | Mold for cold forging |
| CN106378632A (en) * | 2016-10-19 | 2017-02-08 | 扬州星月燃油喷射有限公司 | Precise forming mechanism of oil pump oil mouth plunger sleeve |
| CN206997658U (en) * | 2017-07-07 | 2018-02-13 | 嘉兴耐思得模具科技有限公司 | A kind of gas extraction system of cold upsetting die of car |
| CN207839993U (en) * | 2017-11-10 | 2018-09-11 | 宾科汽车紧固件（昆山）有限公司 | Turbocharger bypass switch screw cold upsetting die of car |
| CN108555200A (en) * | 2018-01-12 | 2018-09-21 | 上海裴椒汽车部件制造有限公司 | A kind of oil connection cold heading technique and its cold upsetting die of car |
| CN208853636U (en) * | 2018-04-04 | 2019-05-14 | 东莞市力胜模具有限公司 | A kind of screw punch pin |
| CN210359080U (en) * | 2019-08-27 | 2020-04-21 | 苏州工业园区新凯精密五金有限公司 | Cold-heading module of forming welded nut |
| CN211539351U (en) * | 2019-10-09 | 2020-09-22 | 宁波清熙金属智能科技有限公司 | Bolt cold-heading mould that cooling performance is good |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112475811B (en) | 2022-09-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106141061A (en) | A kind of cold-heading molding technique for manufacturing positioning and guiding nut and cold-heading module | |
| CN108580790A (en) | A kind of automotive wheel cup nut multi-station cold-heading method and its mold | |
| CN110814267B (en) | Manufacturing process of oxygen sensor nut for automobile | |
| CN108941403A (en) | Ring-like inside groove class part cold-heading molding technique | |
| CN109226619B (en) | Machining process of oil pipe joint | |
| CN112475811B (en) | Machining process of oil pipe joint | |
| CN109433988A (en) | A kind of continuous press forging forming process of taper counter sink and mold | |
| CN108607946A (en) | A kind of big specification straight bevel gear study on precision forging technology | |
| CN116871429A (en) | Forming process of automobile crank pulley with unequal wall thickness | |
| CN114749552B (en) | Fine stamping process for clutch plate | |
| CN112548492B (en) | Method for manufacturing inner sleeve for fixing chassis of vehicle | |
| CN115319412A (en) | Processing method of shell with variable wall thickness | |
| KR930008590B1 (en) | Manufacturing process for end fitting for eye joint | |
| CN113787162A (en) | Machining device and forming machining method for hexagon flange face bolt | |
| CN112439837B (en) | Four-way valve body production process | |
| CN116393584B (en) | Method for forming large chamfer angle based on die stamping | |
| CN220387796U (en) | Cold heading assembling die for thin-wall straight-line tooth ring body | |
| CN211218366U (en) | Dovetail type guide expanding cone | |
| CN104338858A (en) | Hardware part stamping die | |
| CN216705832U (en) | Novel cold heading shaping of welding hexagonal flange face nut device | |
| CN218693122U (en) | Continuous die structure for flanging of inner hole of part | |
| CN113732088B (en) | Processing technology of pressure-stabilizing cup seat of oil injection pump body of automobile engine | |
| CN108311633A (en) | A kind of big specification straight bevel gear multistep former | |
| CN217570445U (en) | Stamping die for manufacturing thin-wall internal spline tube | |
| CN218785161U (en) | Cold heading frock is used in production of eccentric pivot of on-vehicle refrigerator door |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |