CN215703951U - Non-cracking alloy screw - Google Patents
Non-cracking alloy screw Download PDFInfo
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- CN215703951U CN215703951U CN202121952081.7U CN202121952081U CN215703951U CN 215703951 U CN215703951 U CN 215703951U CN 202121952081 U CN202121952081 U CN 202121952081U CN 215703951 U CN215703951 U CN 215703951U
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Abstract
The non-cracking alloy screw comprises a screw body, a connecting rod, an exhaust groove, a thread section, a round thread, a base material alloy layer, a surface alloy layer, a thread alloy strip, an exhaust thread and an exhaust thread alloy strip. The utility model has the advantages that: the screw rod is made of alloy steel, so that the screw rod has high strength and toughness, good hardenability and no obvious tempering brittleness, and has high fatigue limit and multiple impact resistance after quenching and tempering, and the screw rod body is prevented from cracking; by simplifying the screw structure, designing smooth transition of each connecting section of the screw, designing the thread structure into a circular thread, and designing the joint of the tooth bottom of the circular thread and the main shaft of the screw into an arc shape, the problems that the thread part and each joint are stressed unevenly and are cracked due to concentrated tissue stress are avoided; aiming at the condition that the thread part needs to bear larger pressure, alloy strips are overlaid on the tooth surfaces of the round threads, so that the corrosion resistance of the thread part is improved, the stress is dispersed, and the alloy layers are prevented from deforming and cracking.
Description
Technical Field
The utility model relates to a crack-free alloy screw, and belongs to the technical field of screws.
Background
In recent years, the wear resistance of conventional screws has been inadequate as a result of the increased screw speed and the increased pressure in the barrel, and more particularly as a result of the addition of large amounts of filler during extrusion. Therefore, a new alloy screw is formed by performing the process treatments such as surfacing, spraying and the like on the surface of the screw, so that the wear resistance and corrosion resistance of the screw are greatly improved. But the alloy screw rod is easy to generate cracks in the processing and using processes, the alloy layer is easy to peel off after cracking, the wear resistance and the integral hardness of the screw rod are damaged, and the stable operation of the screw rod is not facilitated. Therefore, it is necessary to design a screw to solve this problem.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a crack-free alloy screw.
The utility model aims to solve the problem that an alloy layer is easy to crack in the processing and using processes of the existing alloy screw.
In order to realize the purpose of the utility model, the technical scheme adopted by the utility model is as follows:
non-cracking alloy screw rod, including screw rod body, connecting rod, exhaust duct, screw thread section, round thread, substrate alloy layer, surface alloy layer, screw thread alloy strip, exhaust screw thread and exhaust screw thread alloy strip, characterized by: the screw rod body is provided with a connecting rod, the connecting rod is provided with an exhaust groove, the rear portion of the exhaust groove is connected with and provided with a thread section, the thread section is provided with a round thread, the surface of the thread section is coated with a base material alloy layer, the base material alloy layer is coated with a surface alloy layer, a thread alloy strip is welded on the surface alloy layer located at the tooth surface of the round thread in a surfacing mode, the exhaust groove is provided with an exhaust thread, and the exhaust thread is welded on the exhaust thread in a surfacing mode.
Further, the screw body is made of alloy steel and is subjected to heat treatment and surface treatment such as normalizing and tempering.
Furthermore, each connecting section of the screw body is in smooth transition.
Furthermore, the substrate alloy layer is made of SKD61, and the surface alloy layer is made of imported tungsten carbide, nickel-based alloy and cobalt-based alloy; the base alloy layer and the surface alloy layer adopt a metallurgical bonding mode.
Furthermore, the circular thread is provided with a tooth surface which is an arc surface; the bottom of the round thread is provided with a tooth bottom which is arc-shaped.
Further, the exhaust screw thread is a round screw thread, and the screw ridge width of the exhaust screw thread is smaller than that of the round screw thread.
The utility model has the advantages that: the screw rod is made of alloy steel, so that the screw rod has high strength and toughness, good hardenability and no obvious tempering brittleness, and has high fatigue limit and multiple impact resistance after quenching and tempering, and the screw rod body is prevented from cracking; by simplifying the screw structure, designing smooth transition of each connecting section of the screw, designing the thread structure into a circular thread, and designing the joint of the tooth bottom of the circular thread and the main shaft of the screw into an arc shape, the problems that the thread part and each joint are stressed unevenly and are cracked due to concentrated tissue stress are avoided; the surface of the screw is integrally sprayed with a base alloy layer and a surface alloy layer, the base alloy layer increases the adhesive force of alloy materials and a screw matrix, and the surface alloy layer enables the screw to have good surface finish and strong corrosion resistance; aiming at the condition that the thread part needs to bear larger pressure, alloy strips are overlaid on the tooth surfaces of the round threads, so that the corrosion resistance of the thread part is improved, the stress is dispersed, and the alloy layers are prevented from deforming and cracking.
Drawings
FIG. 1 is a schematic structural view of a crack-free alloy screw;
FIG. 2 is an enlarged schematic view of the round thread of the crack-free alloy screw;
FIG. 3 is a schematic cross-sectional view of a round flight of a crack-free alloy screw;
FIG. 4 is a schematic structural view of a vent groove of a crack-free alloy screw;
in the figure: 1. the screw comprises a screw body 2, a connecting rod 3, an exhaust groove 4, a threaded section 5, a round thread 51, a thread surface 52, a thread bottom 6, a base alloy layer 7, a surface alloy layer 8, a thread alloy strip 9, an exhaust thread 10 and an exhaust thread alloy strip.
Detailed Description
The utility model is further described with reference to the following figures and examples.
Non-cracking alloy screw rod, including screw rod body 1, connecting rod 2, exhaust duct 3, screw thread section 4, round thread 5, substrate alloy layer 6, surface alloy layer 7, screw thread alloy strip 8, exhaust screw thread 9 and exhaust screw thread alloy strip 10, characterized by: be equipped with connecting rod 2 on the screw rod body 1 for provide the connection, be equipped with air discharge duct 3 on connecting rod 2, be used for the exhaust, connect behind air discharge duct 3 and install screw thread section 4, be used for carrying the extrusion material, be equipped with round thread 5 on screw thread section 4, for the screw rod component part, 4 surface spraying of screw thread section have substrate alloy layer 6, be used for providing adhesive force, the last spraying of substrate alloy layer 6 has surface alloy layer 7, be used for providing wear-resisting corrosion resisting property, it has threaded alloy strip 8 to lie in build-up welding on 5 tooth face 7 of round thread department, be used for alleviateing the atress, be equipped with air discharge thread 9 on the air discharge duct 3, be used for the exhaust, build-up welding has air discharge thread alloy strip 10 on the air discharge thread 9, be used for alleviateing the atress.
Further, the screw body 1 is made of alloy steel and is subjected to heat treatment and surface treatment such as normalizing and tempering.
Furthermore, each connecting section of the screw body 1 is in smooth transition.
Furthermore, the substrate alloy layer 6 is made of SKD61, and the surface alloy layer 7 is made of self-fluxing alloy such as imported tungsten carbide, nickel-based alloy and cobalt-based alloy; the base alloy layer 6 and the surface alloy layer 7 adopt a metallurgical bonding mode.
Further, a tooth surface 51 is arranged on the round thread 5, and the tooth surface 51 is a circular arc surface; the bottom of the round thread 5 is provided with a tooth bottom 52, and the tooth bottom 52 is in a circular arc shape.
Further, the exhaust screw thread 9 is a round screw thread, and the width of the screw edge of the exhaust screw thread 9 is smaller than that of the screw edge of the round screw thread 5.
The using method comprises the following steps: alloy steel is selected as a screw material, after rough machining, surface treatment such as tempering and heat treatment, and semi-finish machining improvement treatment, the screw body 1 has higher fatigue limit and multiple impact resistance, and the hardness of the screw body 1 is improved; in order to improve the adhesion between the base alloy layer 6 and the screw body 1, AL is applied before spraying2O3Performing sand blasting treatment on the screw body 1, wherein the dispersed alloy powder is in a completely molten or surface molten state in oxygen-acetylene flameSpraying the mixture to the surface of the screw body 1 to enable the base alloy layer 6 to be attached to the screw body 1, spraying the self-fluxing alloy on the base alloy layer 6 in a metallurgical bonding mode to form a surface alloy layer 7, enabling the surface alloy layer 7 to be bonded with the base alloy layer 6, enabling the thickness of the whole of the surface alloy layer 7 and the base alloy layer 6 to be uniform, and preventing uneven stress; after spraying, further sintering treatment is carried out, so that the load bearing capacity of the whole screw body 1 is improved, and the external force resistance of the surface alloy layer 7 is improved; and a thread alloy strip 8 is welded on the round thread 5 in a surfacing mode, so that the impact capacity of the round thread 5 under external force is improved, and the alloy layer at the round thread 5 is prevented from cracking.
Claims (6)
1. Alloy screw rod that does not have chap includes screw rod body (1), connecting rod (2), exhaust groove (3), screw thread section (4), round thread (5), substrate alloy layer (6), surface alloy layer (7), screw thread alloy strip (8), exhaust screw thread (9) and exhaust screw thread alloy strip (10), characterized by: be equipped with connecting rod (2) on screw rod body (1), be equipped with air discharge duct (3) on connecting rod (2), connect behind air discharge duct (3) and install screw thread section (4), be equipped with round thread (5) on screw thread section (4), screw thread section (4) surface coating has substrate alloy layer (6), and the coating has surface alloy layer (7) on substrate alloy layer (6), and it has screw thread alloy strip (8) to be located surfacing on surface alloy layer (7) of round thread (5) flank department, be equipped with exhaust screw thread (9) on air discharge duct (3), surfacing has exhaust screw thread alloy strip (10) on exhaust screw thread (9).
2. The crack-free alloy screw of claim 1, wherein: the screw body (1) is made of alloy steel and is subjected to heat treatment and surface treatment such as normalizing, tempering and the like.
3. The crack-free alloy screw of claim 1, wherein: and each connecting section of the screw body (1) is in smooth transition.
4. The crack-free alloy screw of claim 1, wherein: the substrate alloy layer (6) is made of SKD61, and the surface alloy layer (7) is made of imported tungsten carbide, nickel-based alloy and cobalt-based alloy; the base alloy layer (6) and the surface alloy layer (7) adopt a metallurgical bonding mode.
5. The crack-free alloy screw of claim 1, wherein: the circular thread (5) is provided with a tooth surface (51), and the tooth surface (51) is an arc surface; the bottom of the round thread (5) is provided with a tooth bottom (52), and the tooth bottom (52) is arc-shaped.
6. The crack-free alloy screw of claim 1, wherein: the exhaust screw threads (9) are round screw threads, and the screw ridge width of the exhaust screw threads (9) is smaller than that of the round screw threads (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121952081.7U CN215703951U (en) | 2021-08-19 | 2021-08-19 | Non-cracking alloy screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121952081.7U CN215703951U (en) | 2021-08-19 | 2021-08-19 | Non-cracking alloy screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215703951U true CN215703951U (en) | 2022-02-01 |
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ID=79998486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121952081.7U Active CN215703951U (en) | 2021-08-19 | 2021-08-19 | Non-cracking alloy screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215703951U (en) |
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2021
- 2021-08-19 CN CN202121952081.7U patent/CN215703951U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Non cracking alloy screw Effective date of registration: 20230531 Granted publication date: 20220201 Pledgee: Zhejiang Tailong Commercial Bank Co.,Ltd. Zhoushan Jintang Small and Micro Enterprise Specialized Branch Pledgor: ZHEJIANG YUJIN PLASTIC MACHINERY Co.,Ltd. Registration number: Y2023330001030 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |