A cold heading formed screw sleeve and forming method

Abstract

The present invention discloses a cold-heading forming screw sleeve and a forming method, which relates to the technical field of cold-heading forming screw sleeves. In order to solve the problems in the prior art that in the prior art, to realize this special-shaped curved surface connecting base, machining and other methods are adopted, but its production efficiency is low, the material utilization rate is not high, etc., resulting in high costs. One end of the screw sleeve body is provided with a welding matching curved surface, and the other end of the screw sleeve body is provided with a positioning surface. A locking screw groove is arranged inside the positioning surface, a tool withdrawal groove is arranged below the locking screw groove, and a cylindrical through hole is arranged at the bottom of the tool withdrawal groove. The cylindrical through hole penetrates and extends to the surface of the welding matching curved surface. The blank forming except for the internal thread of the curved surface connecting base is realized by a six-station high-speed forming machine. After the blank forming, the machining of the internal thread of the connecting curved surface connecting base, the thread tool withdrawal groove, and the cylindrical through hole is completed by a numerical control lathe.

Description

Technical Field

[0001] The present invention relates to the technical field of cold-heading forming screw sleeves, and specifically to a cold-heading forming screw sleeve and a forming method thereof. Background Art

[0002] In an automotive pipeline system or other fluid pipeline systems, in order to monitor the temperature, oxygen content, pressure, etc. during the operation of the pipeline fluid, it is necessary to apply a connection base that fits with various metal special-shaped curved surfaces and the fluid pipeline. The curved surface fixing screw sleeve is fixed on the metal fluid pipeline curved surface by welding, so as to install various sensor monitoring devices for monitoring the real-time temperature, oxygen content, pressure, etc. of the pipeline fluid, and ensure the safe operation of the metal fluid pipeline.

[0003] However, in the prior art, realizing such a special-shaped curved surface connection base is achieved by machining and other methods, but its production efficiency is low, the material utilization rate is not high, etc., resulting in high costs; therefore, it does not meet the existing requirements, and for this reason, we propose a cold-heading forming screw sleeve and a forming method thereof. Summary of the Invention

[0004] The purpose of the present invention is to provide a cold-heading forming screw sleeve and a forming method thereof, so as to solve the problems in the prior art mentioned in the above background art, that is, realizing such a special-shaped curved surface connection base by machining and other methods, but its production efficiency is low, the material utilization rate is not high, etc., resulting in high costs.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A cold-heading forming screw sleeve, including a screw sleeve body, one end of the screw sleeve body is provided with a welding fitting curved surface, and the other end of the screw sleeve body is provided with a positioning surface.

[0006] Preferably, a locking screw groove is arranged inside the positioning surface, a relief groove is arranged below the locking screw groove, and a cylindrical through hole is arranged at the bottom of the relief groove, and the cylindrical through hole penetrates and extends to the surface of the welding fitting curved surface.

[0007] A forming method of a cold-heading forming screw sleeve includes the following steps:

[0008] Step 1: Realize the blank forming of the part except the internal thread of the curved surface connection base through a six-station high-speed forming machine;

[0009] Step 2: After the blank forming, then complete the machining of the internal thread of the connection curved surface connection base, the thread relief groove, and the cylindrical through hole through a numerical control lathe;

[0010] Step 3: Clean the surface of the product through hydrocarbon cleaning to complete the production and packaging and warehousing operations of the product;

[0011] In the second step, the locking thread is used to install monitoring sensors for monitoring the temperature, pressure, oxygen content, etc. of the metal fluid pipeline. In the second step, the relief groove is a relief groove with high requirements for surface roughness and angle control, and is hermetically installed with the monitoring sensor. In the second step, the cylindrical through-hole is set as the sensor detection hole.

[0012] In the first step, the forming process of realizing the blank forming such as the internal thread of the curved surface connection base by using a six-station high-speed forming machine is as follows:

[0013] S1: Through the automatic feeding system of the forming machine, the coil material is fed into the cutting device of the forming machine, and automatic cutting and feeding are realized according to the material volume required by the product.

[0014] S2: The material fed into the first die inlet is pushed into the die cavity by the first punch die of the forming machine to realize the pre-shaping of the two end faces, eliminate burrs, flash, etc., complete the forming of the first station, eject the formed blank to the next station, and reset to form the next product.

[0015] S3: Through the second punch die of the forming machine, the blank formed in the first station is flipped and fed into the second die cavity by the automatic feeding clamp for extrusion shaping, and a large taper chamfer is formed at one end of the die bottom to facilitate the filling of the welding matching curved surface in the next die cavity. Complete the forming of the second station, eject the formed blank to the next station, and reset to form the next product.

[0016] S4: Through the third punch die of the forming machine, the blank formed in the second station is flipped and fed into the third die cavity by the automatic feeding clamp for extrusion shaping, and is extruded according to the inclined plane shape of the die bottom of the die cavity to perform filling and shaping for the forming of the welding matching curved surface. Complete the forming of the third station, eject the formed blank to the next station, and reset to form the next product.

[0017] S5: Through the fourth punch die of the forming machine, the blank formed in the third station is flipped and fed into the fourth die cavity by the automatic feeding clamp, and the welding matching curved surface is formed by the reverse extrusion of the front punch rod. At the same time, two positioning planes are formed by the extrusion of the die bottom. Complete the forming of the fourth station; eject the formed blank to the next station, and reset to form the next product;

[0018] S6: Through the fifth punch die of the forming machine, the blank formed in the fourth station is flipped and fed into the fifth die cavity by the automatic feeding clamp to complete the turning function, and after positioning the direction for the welding matching curved surface and the final forming of the blank, the blank is ejected to the next station and reset;

[0019] S7: Through the sixth punch die of the forming machine, the blank is translated from the fifth station through the automatic feeding clamp and sent into the sixth die to form the prefabricated hole of the locking thread. At the same time, the welding mating surface is extruded again, so that the welding mating surface completely fills the cavity, completing the forming of the sixth station. The formed blank is taken out of the die cavity by the front punch rod and stripped by the stripping plate, completing the forming of the curved surface connection base except for the locking thread, cylindrical through hole, etc.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. The present invention replaces the expensive composite processing equipment with a combined process of cold heading and precision machining, greatly improving the material utilization rate and production efficiency of mass production, reducing production costs, and maintaining a stable profit level for enterprises;

[0022] 2. Through the sixth punch die of the forming machine, the blank is translated from the fifth station through the automatic feeding clamp and sent into the sixth die to form the prefabricated hole of the locking thread. At the same time, the welding mating surface is extruded again, so that the welding mating surface completely fills the cavity, completing the forming of the sixth station. The formed blank is taken out of the die cavity by the front punch rod and stripped by the stripping plate, completing the forming of the curved surface connection base except for the locking thread, cylindrical through hole, etc.;

[0023] 3. The welding mating surface of the present invention refers to the surface that fits different fluid pipelines, usually having at least two or more transition connections, non-symmetrical arc surfaces, regular arc surfaces, located on one end face of the main cylinder body, while the positioning plane is arranged unilaterally or symmetrically on the cylinder body at the other end of the structure body, and forms a limit of position degree and symmetry with the welding mating surface to realize the position positioning of the automatic manipulator for automated production. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is the overall front view of the present invention;

[0025] Figure 2 It is the schematic structural diagram of the positioning surface of the present invention;

[0026] Figure 3 It is the schematic cross-sectional structural diagram of the bushing body of the present invention;

[0027] Figure 4 It is the schematic forming structure diagram of the bushing of the present invention.

[0028] In the figure: 1. Bushing body; 2. Welding mating surface; 3. Positioning surface; 4. Locking thread groove; 5. Relief groove; 6. Cylindrical through hole; 7. Front punch rod; 8. Die housing; 9. Rear punch rod; 10. Die core forming cavity; 11. Rear hole; 12. Alloy end head; 13. Tapered hexagon bolt. DETAILED DESCRIPTION OF THE INVENTION

[0029] Next, in combination with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0030] Please refer to Figures 1 - 3 , an embodiment provided by the present invention: a cold heading forming screw sleeve, including a screw sleeve body 1, one end of the screw sleeve body 1 is provided with a welding fitting surface 2, and the welding fitting surface 2 refers to a surface for fitting different fluid pipelines, usually having at least two or more transition connections, asymmetric arc surfaces, regular arc surfaces, provided on one end face of the main body cylinder, and the other end of the screw sleeve body 1 is provided with a positioning surface 3, the positioning plane is arranged unilaterally or symmetrically, provided on the cylinder at the other end of the structure body, and forms a position and symmetry limit with the welding fitting surface to realize the position positioning of automatic manipulator automated production. Inside the positioning surface 3 is provided with a locking screw groove 4, below the locking screw groove 4 is provided with a relief groove 5, and at the bottom of the relief groove 5 is provided with a cylindrical through hole 6, and the cylindrical through hole 6 penetrates and extends to the surface of the welding fitting surface 2.

[0031] Please refer to Figure 4 , a forming method of a cold heading forming screw sleeve, including the following steps:

[0032] Step 1: Realize the blank forming except for the internal thread of the curved surface connection base through a six-station high-speed forming machine;

[0033] Step 2: After the blank is formed, then complete the processing of the internal thread of the connection curved surface connection base, the thread relief groove 5, and the cylindrical through hole 6 through a numerical control lathe;

[0034] Step 3: Clean the surface of the product through hydrocarbon cleaning to complete the production and packaging and warehousing operations of the product.

[0035] Further, in Step 2, the locking thread is used to install monitoring sensors such as temperature, pressure, and oxygen content of the metal fluid pipeline. The relief groove 5 is a relief groove with high requirements for surface roughness and angle control, and is hermetically installed with the monitoring sensor. The cylindrical through hole 6 is set as a sensor detection hole.

[0036] Further, in Step 1, the forming process of realizing the blank forming except for the internal thread of the curved surface connection base and the like by applying a six-station high-speed forming machine is as follows:

[0037] S1: Through the automatic feeding system of the forming machine, feed the coil material into the cutting device of the forming machine, and realize automatic cutting and feeding according to the material volume required by the product;

[0038] S2: Push the material fed into the first die inlet into the die cavity through the first punch die of the molding machine to achieve pre-shaping of the two end faces, eliminate burrs, flash, etc., complete the forming at the first station, eject the formed blank to the next station, and reset to form the next product;

[0039] S3: Through the second punch die of the molding machine, flip and feed the blank formed at the first station into the second die cavity through the automatic feeding clamp for extrusion and shaping, form a large taper chamfer at one end of the die bottom to supply material for the welding fitting surface 2 in the subsequent die cavity, complete the forming at the second station, eject the formed blank to the next station, and reset to form the next product;

[0040] S4: Through the third punch die of the molding machine, flip and feed the blank formed at the second station into the third die cavity through the automatic feeding clamp for extrusion and shaping, extrude according to the inclined plane shape of the die bottom of the die cavity, and perform filling and shaping for the forming of the welding fitting surface 2, complete the forming at the third station, eject the formed blank to the next station, and reset to form the next product;

[0041] S5: Through the fourth punch die of the molding machine, flip and feed the blank formed at the third station into the fourth die cavity through the automatic feeding clamp, and form the welding fitting surface 2 by reverse extrusion of the front punch rod 7. At the same time, two positioning planes are formed by extrusion of the die bottom, completing the forming at the fourth station; eject the formed blank to the next station, and reset to form the next product;

[0042] S6: Through the fifth punch die of the molding machine, flip and feed the blank formed at the fourth station into the fifth die cavity through the automatic feeding clamp to complete the turning function, perform direction positioning for the welding fitting surface 2 and the final forming of the blank, and then eject the blank to the next station and reset;

[0043] S7: Through the sixth punch die of the molding machine, translate the blank from the fifth station through the automatic feeding clamp, feed the blank into the sixth die to form the prefabricated hole for the locking thread while extruding the welding fitting surface 2 again, so that the welding fitting surface 2 completely fills the cavity, complete the forming at the sixth station, take out the formed blank from the die cavity through the front punch rod 7, and perform blanking through the blanking plate to complete the forming of the curved surface connection base except for the locking thread, cylindrical through hole 6, etc.

[0044] Furthermore, the six-station high-speed molding machine includes a front punch rod 7, a die housing 8, and a rear punch rod 9. The inside of the die housing 8 is provided with a die core forming cavity 10, and an alloy end 12 is arranged outside the die core forming cavity 10. A rear hole 11 is arranged below the alloy end 12, and a tapered hexagon bolt 13 is arranged at the bottom of the rear hole 11.

[0045] Working principle: During use, through the automatic feeding system of the forming machine, the coil material is fed into the cutting device of the forming machine, and automatic cutting and feeding are achieved according to the material volume required for the product. The material fed into the first die inlet of the forming machine is pushed into the die cavity by the first punching die of the forming machine to achieve pre-shaping of the two end faces, eliminate burrs, flash, etc., complete the forming at the first station, eject the formed blank to the next station, and reset to form the next product. Through the second punching die of the forming machine, the blank formed at the first station is flipped by the automatic feeding clamp and fed into the second die cavity for extrusion shaping, forming a large taper chamfer at one end of the die bottom to supply material for the welding matching surface 2 in the next die cavity, complete the forming at the second station, eject the formed blank to the next station, and reset to form the next product. Through the third punching die of the forming machine, the blank formed at the second station is flipped by the automatic feeding clamp and fed into the third die cavity for extrusion shaping, and is extruded according to the inclined plane shape of the die bottom of the die cavity to supply material and shape for the forming of the welding matching surface 2, complete the forming at the third station, eject the formed blank to the next station, and reset to form the next product. Through the fourth punching die of the forming machine, the blank formed at the third station is flipped by the automatic feeding clamp and fed into the fourth die cavity, and the welding matching surface 2 is formed by the reverse extrusion of the front punching rod 7. At the same time, two positioning planes are formed by extrusion at the die bottom, complete the forming at the fourth station; eject the formed blank to the next station, and reset to form the next product. Through the fifth punching die of the forming machine, the blank formed at the fourth station is flipped by the automatic feeding clamp and fed into the fifth die cavity to complete the turning function, position the direction for the welding matching surface 2 and the final forming of the blank, and then eject the blank to the next station and reset. Through the sixth punching die of the forming machine, the blank is translated from the fifth station by the automatic feeding clamp, fed into the sixth die to form the prefabricated hole for the locking thread while extruding the welding matching surface 2 again, so that the welding matching surface 2 completely fills the cavity, complete the forming at the sixth station, and the formed blank is taken out of the die cavity by the front punching rod 7 and stripped by the stripping plate to complete the forming of the curved surface connection base except for the locking thread, cylindrical through hole 6, etc.

[0046] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed claims.

Claims

1. A forming method for a cold-heading formed screw sleeve, including a screw sleeve body (1). It is characterized in that: One end of the screw sleeve body (1) is provided with a welding matching surface (2), and the other end of the screw sleeve body (1) is provided with a positioning surface (3). A locking screw groove (4) is arranged inside the positioning surface (3). A relief groove (5) is arranged below the locking screw groove (4), and a cylindrical through hole (6) is arranged at the bottom of the relief groove (5). The cylindrical through hole (6) extends through to the surface of the welding matching surface (2). The method includes the following steps: Step 1: Realize the blank forming except for the internal thread of the curved surface connection base through a six-station high-speed forming machine. Step 2: After the blank is formed, then complete the machining of the internal thread of the connection curved surface connection base, the thread relief groove (5), and the cylindrical through hole (6) through a numerical control lathe. Step 3: Clean the surface of the product through hydrocarbon cleaning to complete the production of the product and the packaging and warehousing operations. In the second step, the locking thread is used to install monitoring sensors for monitoring the temperature, pressure, oxygen content, etc. of the metal fluid pipeline. In the second step, the relief groove (5) is a relief groove with high requirements for surface roughness and angle control, and is hermetically installed with the monitoring sensor. In the second step, the cylindrical through hole (6) is set as the sensor detection hole. In the first step, the forming process of realizing the blank forming except for the internal thread of the curved surface connection base and the like by applying a six-station high-speed forming machine is as follows: S1: Through the automatic feeding system of the forming machine, feed the coil material into the cutting device of the forming machine, and realize automatic cutting and feeding according to the material volume required for the product. S2: Push the material fed into the first die inlet into the die cavity through the first punch die of the forming machine to realize the pre-shaping of the two end faces, eliminate burrs, flash, etc., complete the forming of the first station, eject the formed blank to the next station, and reset to form the next product. S3: Through the second punch die of the forming machine, turn over and feed the blank formed in the first station into the second die cavity through the automatic feeding clamp for extrusion shaping, form a large taper chamfer at one end of the die bottom, so as to supply material for the welding matching surface (2) in the next die cavity, complete the forming of the second station, eject the formed blank to the next station, and reset to form the next product. S4: Through the third punch die of the forming machine, turn over and feed the blank formed in the second station into the third die cavity through the automatic feeding clamp for extrusion shaping, and extrude according to the inclined plane shape of the die bottom of the die cavity to supply material and shape for the forming of the welding matching surface (2), complete the forming of the third station, eject the formed blank to the next station, and reset to form the next product. S5: Through the fourth punch die of the forming machine, turn over and feed the blank formed in the third station into the fourth die cavity through the automatic feeding clamp, and form the welding matching surface (2) by the reverse extrusion of the front punch rod (7). At the same time, two positioning planes are formed by extrusion at the die bottom, completing the forming of the fourth station; eject the formed blank to the next station, and reset to form the next product. S6: Through the fifth die of the molding machine, the blank formed at the fourth station is flipped and fed into the fifth cavity by the automatic feeding clamp to complete the turning function. After positioning the direction for welding the mating surface (2) and final forming of the blank, the blank is ejected to the next station and reset. S7: Through the sixth die of the molding machine, the blank is translated from the fifth station by the automatic feeding clamp and fed into the sixth die to form and lock the pre - drilled hole of the thread while squeezing the welding mating surface (2) again, so that the welding mating surface (2) completely fills the cavity, completing the forming at the sixth station. The formed blank is taken out of the die cavity by the front punch rod (7) and stripped by the stripping plate, completing the forming of the curved surface connection base except for the locking thread, cylindrical through - hole (6), etc.

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