CN116202893A - Novel steel wire spiral contact device suitable for steel wire bending friction fatigue machine - Google Patents
Novel steel wire spiral contact device suitable for steel wire bending friction fatigue machine Download PDFInfo
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- CN116202893A CN116202893A CN202211582616.5A CN202211582616A CN116202893A CN 116202893 A CN116202893 A CN 116202893A CN 202211582616 A CN202211582616 A CN 202211582616A CN 116202893 A CN116202893 A CN 116202893A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
The invention provides a novel steel wire spiral contact device suitable for a steel wire bending friction fatigue machine, which comprises a base frame, a fatigue device and a novel steel wire spiral contact device, wherein the novel steel wire spiral contact device comprises a steel wire cross angle conversion device, a convex-concave bending steel wire fixing device and a constant load integrated loading device. The method has the beneficial effects that complex contact forms among different interlaminar steel wire ropes, different strands in the steel wire ropes and between the steel wire layers and bending curvature radiuses of various contact steel wires are effectively simulated; realizing constant contact load between steel wires; the cross angle adjustment range is wider; simple operation, complete functions and good effect, and has wide practicability in the technical field.
Description
Technical Field
The invention relates to the technical field of test devices, in particular to a novel steel wire spiral contact device suitable for a steel wire bending friction fatigue machine.
Background
With the increasing development of ocean resource exploration, a deep sea drill is a technical device necessary for exploitation of ocean resources. The marine drilling machine lifting system mainly comprises a winch, a drilling platform, a crown block, a traveling block, a hook, a steel wire rope (a complex spiral structure formed by twisting wires into strands and twisting the strands into ropes at a certain twisting angle) and the like. One end of the steel wire rope is a fast rope end and is wound on the roller in multiple layers, and the steel wire rope sequentially winds through a plurality of groups of pulley systems of a static pulley, a movable pulley and a static pulley … …, and the other end of the steel wire rope is a dead rope end and is kept fixed. In the process of lifting and lowering a drill rod, the steel wire rope bears time-varying stretching and bending loads and the corrosion action of salt mist at sea, so that the steel wire inside the steel wire rope is bent, rubbed and fatigued. The steel wires in the multi-layer steel wire ropes on the roller and the steel wires in different sections (straight line section, roller bending section and static and dynamic pulley bending section) all show different contact forms (convex-convex contact and convex-concave contact), different bending curvature radiuses and different crossing angles among the steel wires, so that different steel wire bending friction fatigue failure mechanisms are caused. Therefore, the novel steel wire spiral contact device suitable for the steel wire bending friction fatigue machine is provided, is important for revealing a steel wire bending fatigue failure mechanism under a complex spiral contact state, and has important significance for guaranteeing the service safety of a steel wire rope of a lifting system of the marine drilling machine.
The test device in the aspect of steel wire friction fatigue comprises: the patent number 202011579256.4 discloses a steel wire corrosion and abrasion coupling fatigue test device which can realize synchronous action of corrosion, abrasion and fatigue on a steel wire and is used for corrosion and abrasion coupling fatigue test of the steel wire and comparative test research thereof; the patent number 202010227362.X discloses a test device and a method for determining the fatigue life of a steel wire under different corrosion solvents, wherein the corrosion and the fatigue are combined, and the influence of the corrosion solvents on the corrosion fatigue life is quantified by examining S-N curves under the action of the different corrosion solvents; patent number CN202210330973.6 discloses a device and a method for accelerating corrosion fatigue test and evaluating service life of a high-strength steel wire, wherein reciprocating load is applied to two ends of the steel wire to realize corrosion and fatigue coupling action, and the influence rules of different factors on corrosion fatigue damage of the cable high-strength steel wire are researched by applying given corrosion potential or corrosion current, fatigue stress amplitude and loading frequency; the experimental device considers friction corrosion fatigue coupling damage, but can not realize the evaluation of the friction corrosion fatigue coupling damage of the steel wires with different contact forms, different bending curvature radiuses of the steel wires and different crossing angles among the steel wires. Patent number CN201910316840.1 discloses a well test steel wire fatigue simulation device and method, through setting up the repeated tensile and wearing conditions of weight piece simulation well test steel wire in the field operation to this realizes well test steel wire fatigue test under different operating modes, can accurately grasp the fatigue degree of the weak section in the middle of the well test steel wire after using a period of time, but can't realize the steel wire friction fatigue damage evaluation under different contact forms, the different bending curvature radius.
Disclosure of Invention
In order to solve the problems, and particularly to overcome the defects in the prior art, the invention provides a novel steel wire spiral contact device suitable for a steel wire bending friction fatigue machine, which can comprehensively solve the problems.
In order to achieve the above purpose, the invention adopts the following technical means:
a novel steel wire spiral contact device suitable for a steel wire bending friction fatigue machine comprises a base frame, a fatigue device and a novel steel wire spiral contact device;
the base frame comprises a base, two groups of sliding rails connected to the base, a first bracket and a second bracket connected to the base, a first shaft connected between the first bracket and the second bracket, a third bracket and a fourth bracket connected to the base, a second shaft connected between the third bracket and the fourth bracket, a first inclined block connected to the base and a second inclined block connected to the base;
the fatigue device comprises an electric cylinder I connected with an inclined block I, an electric cylinder II connected with an inclined block II, a tension sensor I connected with the electric cylinder I through a coupling I, a tension sensor II connected with the electric cylinder II through a coupling II, a clamp I connected with the tension sensor I, a clamp II connected with the tension sensor II, a displacement monitoring plate connected with the clamp I, and a displacement sensor connected with the displacement monitoring plate;
the novel steel wire spiral contact device comprises a steel wire cross angle conversion device, a convex-concave bending steel wire fixing device and a constant load integrated loading device;
the steel wire cross angle conversion device comprises an L-shaped plate, a steering wheel, a bevel gear shaft II and a bevel gear shaft I, wherein the L-shaped plate is in sliding connection with the sliding rail, the steering wheel is in rotary connection with the longitudinal side wall of the L-shaped plate, the bevel gear shaft II is in rotary connection with the transverse side wall of the L-shaped plate, and the bevel gear shaft I is in rotary connection with the bevel gear shaft II and in transmission connection with the steering wheel;
the convex-concave bending steel wire fixing device comprises a corrosion groove connected with the sliding rail, a fatigue steel wire gasket connected in the corrosion groove, a bracket five connected with the bevel gear shaft II and a loading steel wire clamp connected with the bracket five;
the constant load integrated loading device comprises a first bearing sleeved with a first shaft, a second bearing sleeved with a second shaft, a first guide wheel connected to the first shaft through the first bearing, a second guide wheel connected to the second shaft through the second bearing, and a counterweight connected with the L-shaped plate through a nylon wire, wherein the nylon wire winds the first guide wheel and the second guide wheel under the action of the counterweight.
The invention further preferably comprises the following steps: the L-shaped plate is connected with the sliding rail in a sliding way through a dovetail groove.
The invention further preferably comprises the following steps: and a tension and pressure sensor is connected to the joint of the bracket five and the bevel gear shaft two.
The invention further preferably comprises the following steps: four arc-shaped steel wire grooves which are distributed equidistantly are formed in the loading steel wire clamp.
The invention further preferably comprises the following steps: the loading steel wire clamp is connected with the bracket five through a square stepped shaft, the square stepped shaft penetrates through the loading steel wire clamp and is rotationally connected with the loading steel wire clamp, baffles sleeved on the square stepped shaft are arranged on two sides of the loading steel wire clamp, and conical pins spliced with the square stepped shaft are arranged on the side portions, away from the loading steel wire clamp, of the baffles.
The invention further preferably comprises the following steps: the corrosion groove is connected with the sliding rail through a third shaft, and the third shaft is fixedly connected with the sliding rail through a key.
The invention further preferably comprises the following steps: the corrosion groove is connected with a temperature control system, and the temperature control system consists of a refrigerator, a heating machine and a temperature controller.
Compared with the prior art, the invention has the beneficial effects that:
the invention combines convex-concave states with different multi-module structure forms of the loaded steel wire fixing clamp and the curvature radius of the wire groove, can realize convex-convex contact, convex-concave contact and bending curvature radius of the contact steel wires in different contact forms, and can effectively simulate complex contact forms and various bending curvature radii of the contact steel wires between different interlaminar steel wires, between different strands in the steel wire rope and between the wires; the ball guide rail and the nylon wire are connected in a guiding way to realize an integrated loading way, so that the gap caused by abrasion among the steel wires can be dynamically adjusted, and the constant contact load among the steel wires is realized; the precise adjustment of the crossing angle between the undetachable steel wires is realized by adopting a bevel gear meshing mode, and the range of the crossing angle adjustment is wider; the invention provides an effective module device for quantitatively evaluating the damage evolution rule under the conditions of revealing different contact forms, bending curvature radius of the steel wires and crossing angles among the steel wires, and has simple operation, complete functions, good effect and wide practicability in the technical field.
Drawings
FIG. 1 is a schematic structural view of the structure of the present invention;
FIG. 2 is a side view of the structure of the present invention;
FIG. 3 is a front view of the structure of the present invention;
FIG. 4 is a schematic view of the male-female contact of two wires according to the present invention;
FIG. 5 is a schematic view of the convex-concave contact of two steel wires according to the present invention;
fig. 6 is a schematic view showing the contact of two steel wires at different angles according to the present invention.
FIG. 7 is an enlarged schematic view of the joint of the bevel gear shaft II and the L-shaped plate;
in the figure:
1. base, 2, bracket one, 3, bracket three, 4, shaft three, 5, pull pressure sensor, 6, shaft one, 7, guide wheel one, 8, bearing one, 9, nylon wire, 10, guide wheel two, 11, bearing two, 12, shaft two, 13, slide rail, 14, key, 15, bracket four, 16, bracket two, 17, swash block one, 18, electric cylinder one, 19, shaft coupling one, 20, tension sensor one, 21, displacement monitor, 22, clamp one, 23, L-shaped plate, 24, steering wheel, 25, weight, 26, clamp two, 27, tension sensor two, 28, shaft coupling two, 29, electric cylinder two, 30, swash block two, 31, square stepped shaft, 32, bevel gear shaft two, 34, bevel gear shaft two, 35, load wire clamp 36, corrosion groove, 37, displacement sensor, 38, temperature control system, 39, load wire, 40, baffle plate, 41, taper pin, 42, fatigue, 43, fatigue wire cushion.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in the accompanying drawings 1-7, the novel steel wire spiral contact device suitable for the steel wire bending friction fatigue machine comprises a base frame, a fatigue device and a novel steel wire spiral contact device.
The base frame comprises a base 1, a sliding rail 13 fixed on the base 1 through a screw, a first support 2 and a second support 16 fixed on the base 1 through a screw, a first shaft 6 fixed between the first support 2 and the second support 16 through welding, a third support 3 and a fourth support 15 fixed on the base 1 through a screw, a second shaft 12 fixed between the third support 3 and the fourth support 15 through welding, a first inclined block 17 fixed on the base 1 through a screw, and a second inclined block 30 fixed on the base 1 through a screw.
The fatigue device comprises a first electric cylinder 18 fixed on a first inclined block 17 through a screw, a second electric cylinder 29 fixed on a second inclined block 30 through a screw, a first tension sensor 20 connected with the first electric cylinder 18 through a first coupling 19, a second tension sensor 27 connected with the second electric cylinder 29 through a second coupling 28, a first clamp 22 connected with the first tension sensor 20 through a threaded connection, a second clamp 26 connected with the second tension sensor 27 through a threaded connection, a displacement monitoring plate 21 screwed and fixed on the first clamp 22 through a nut, and a displacement sensor 37 connected with the displacement monitoring plate 21.
The novel steel wire spiral contact device comprises a steel wire cross angle conversion device, a convex-concave bending steel wire fixing device and a constant load integrated loading device.
The steel wire cross angle conversion device comprises an L-shaped plate 23 which is in sliding connection with the sliding rail 13, a steering wheel 24 which is in rotary connection with the longitudinal side wall of the L-shaped plate 23, a bevel gear shaft II 34 which is in rotary connection with the transverse side wall of the L-shaped plate 23, and a bevel gear shaft I33 which is in rotary connection with the bevel gear shaft II 34 and in transmission connection with the steering wheel 24, wherein the L-shaped plate 23 is in sliding connection with the sliding rail 13 through a dovetail groove.
The convex-concave bending steel wire fixing device comprises a corrosion groove 36 connected with the sliding rail 13, a fatigue steel wire liner 43 connected in the corrosion groove 36, a bracket five 32 connected with the bevel gear shaft II 34 and a loading steel wire clamp 35 connected with the bracket five 32, wherein a tension pressure sensor 5 is connected at the joint of the bracket five 32 and the bevel gear shaft II 34, the corrosion groove 36 is connected with the sliding rail 13 through a shaft three 4, the shaft three 4 is fixedly connected with the sliding rail 13 through a key 14, a temperature control system 38 is connected in the corrosion groove 36, and the temperature control system 38 consists of a refrigerator, a heater and a temperature controller.
Wherein the fatigue steel wire 42 is convex, the loading steel wire clamp 35 is divided into four arc steel wire grooves, namely convex and concave, the bending curvature radius is different, the convex-convex contact and convex-concave contact of the fatigue steel wire 42 and the loading steel wire 39 can be realized when the loading steel wire 39 is fixed in different arc steel wire grooves, the conversion use of the four arc steel wire grooves is realized through the square stepped shaft 31, the baffle 40 and the taper pin 41, and then the non-detachable steel wire contact form and contact curvature conversion are realized.
The constant load integrated loading device comprises a first bearing 8 on a first shaft 6, a second bearing 11 on a second shaft 12, a first guide wheel 7 connected to the first shaft 6 through the first bearing 8, a second guide wheel 10 connected to the second shaft 12 through the second bearing 11, a counterweight 25 connected with an L-shaped plate 23 through a nylon wire 9, wherein the nylon wire 9 winds the first guide wheel 7 and the second guide wheel 10 to drive the L-shaped plate 23 under the action of the counterweight 25, drives a steel wire crossing angle conversion device and a convex-concave bending steel wire fixing device to move along a sliding rail 13, realizes integrated loading of contact steel wires, sets the contact load between steel wires through the size of the counterweight 25, and monitors the contact load between the steel wires through a tension pressure sensor 5; when the contact wires are worn during bending friction fatigue, the weight 25 and nylon wire 9 are dynamically adjusted to ensure a constant contact load between the wires.
Convex contact embodiment:
(1) One end of a fatigue steel wire 42 is connected with a first clamp 22 through a bolt, the first clamp 22 is connected with a first electric cylinder 18 sequentially through a first tension sensor 20 and a first coupling 19 of a displacement detection plate 21, and the other end passes through a corrosion groove 36, is wound on a fatigue steel wire liner 43, and is connected with a second clamp 26, a second tension sensor 27 and a second coupling 28 sequentially.
(2) The loading wire 39 is fixed to the projection of the loading wire jig 35 by bolts.
(3) The steering wheel 24 is rotated to sequentially drive the bevel gear shaft I33 and the bevel gear shaft II 34 to realize the change of the crossing angle between the steel wires.
(4) The contact load change between the convex steel wires is realized by changing the size of the counterweight 25.
(5) And starting a power supply, synchronously starting the first electric cylinder 18 and the second electric cylinder 29, detecting the telescopic displacement of the first electric cylinder 18 by using the displacement detection plate 21, and recording the tension at the two ends of the fatigue steel wire 42 in real time through the first tension sensor 20 and the second tension sensor 27.
(6) And stopping working of the first electric cylinder 18 and the second electric cylinder 29 until the fatigue cycle times are set, and finishing the test.
Convex-concave contact examples:
(1) One end of a fatigue steel wire 42 is connected with a first clamp 22 through a bolt, the first clamp 22 is connected with a first electric cylinder 18 sequentially through a first tension sensor 20 and a first coupling 19 of a displacement detection plate 21, and the other end passes through a corrosion groove 36, is wound on a fatigue steel wire liner 43, and is connected with a second clamp 26, a second tension sensor 27 and a second coupling 28 sequentially.
(2) The loading wire 39 is fixed to the recessed portion of the loading wire jig 35 by bolts.
(3) The steering wheel 24 is rotated to sequentially drive the bevel gear shaft I33 and the bevel gear shaft II 34 to realize the change of the crossing angle between the steel wires.
(4) The contact load change between the convex steel wires is realized by changing the size of the counterweight 25.
(5) And starting a power supply, synchronously starting the first electric cylinder 18 and the second electric cylinder 29, detecting the telescopic displacement of the first electric cylinder 18 by using the displacement detection plate 21, and recording the tension at the two ends of the fatigue steel wire 42 in real time through the first tension sensor 20 and the second tension sensor 27.
(6) And stopping working of the first electric cylinder 18 and the second electric cylinder 29 until the fatigue cycle times are set, and finishing the test.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The novel steel wire spiral contact device suitable for the steel wire bending friction fatigue machine is characterized by comprising a base frame, a fatigue device and a novel steel wire spiral contact device;
the base frame comprises a base (1), two groups of sliding rails (13) connected to the base (1), a first bracket (2) and a second bracket (16) connected to the base (1), a first shaft (6) connected between the first bracket (2) and the second bracket (16), a third bracket (3) and a fourth bracket (15) connected to the base (1), a second shaft (12) connected between the third bracket (3) and the fourth bracket (15), a first oblique block (17) connected to the base (1) and a second oblique block (30) connected to the base (1);
the fatigue device comprises an electric cylinder I (18) connected with an inclined block I (17), an electric cylinder II (29) connected with an inclined block II (30), a tension sensor I (20) connected with the electric cylinder I (18) through a coupling I (19), a tension sensor II (27) connected with the electric cylinder II (29) through a coupling II (28), a clamp I (22) connected with the tension sensor I (20), a clamp II (26) connected with the tension sensor II (27), a displacement monitoring plate (21) connected with the clamp I (22) and a displacement sensor (37) connected with the displacement monitoring plate (21);
the novel steel wire spiral contact device comprises a steel wire cross angle conversion device, a convex-concave bending steel wire fixing device and a constant load integrated loading device;
the steel wire cross angle conversion device comprises an L-shaped plate (23) which is in sliding connection with the sliding rail (13), a steering wheel (24) which is in rotary connection with the longitudinal side wall of the L-shaped plate (23), a bevel gear shaft II (34) which is in rotary connection with the transverse side wall of the L-shaped plate (23), and a bevel gear shaft I (33) which is in rotary connection with the bevel gear shaft II (34) and is in transmission connection with the steering wheel (24);
the convex-concave bending steel wire fixing device comprises a corrosion groove (36) connected with the sliding rail (13), a fatigue steel wire liner (43) connected in the corrosion groove (36), a bracket five (32) connected with the bevel gear shaft II (34) and a loading steel wire clamp (35) connected with the bracket five (32);
the constant load integrated loading device comprises a first bearing (8) sleeved with a first shaft (6), a second bearing (11) sleeved with a second shaft (12), a first guide wheel (7) connected to the first shaft (6) through the first bearing (8), a second guide wheel (10) connected to the second shaft (12) through the second bearing (11), and a balance weight (25) connected with an L-shaped plate (23) through a nylon wire (9), wherein the nylon wire (9) winds the first guide wheel (7) and the second guide wheel (10) under the action of the balance weight (25).
2. A novel wire spiral contact device suitable for a wire bending friction fatigue machine according to claim 1, wherein the L-shaped plate (23) is slidingly connected with the slide rail (13) through a dovetail groove.
3. The novel steel wire spiral contact device suitable for the steel wire bending friction fatigue machine according to claim 1, wherein a tension pressure sensor (5) is connected to the joint of the bracket five (32) and the bevel gear shaft two (34).
4. The novel wire spiral contact device suitable for the wire bending friction fatigue machine according to claim 1, wherein the loading wire clamp (35) is provided with four arc-shaped wire grooves which are distributed equidistantly.
5. The novel steel wire spiral contact device suitable for the steel wire bending friction fatigue machine according to claim 4, wherein the loading steel wire clamp (35) is connected with the bracket five (32) through a square stepped shaft (31), the square stepped shaft (31) penetrates through the loading steel wire clamp (35) to be rotationally connected with the loading steel wire clamp (35), two sides of the loading steel wire clamp (35) are provided with baffle plates (40) sleeved on the square stepped shaft (31), and the side part, away from the loading steel wire clamp (35), of the baffle plates (40) is provided with conical pins (41) spliced with the square stepped shaft (31).
6. The novel wire spiral contact device suitable for the wire bending friction fatigue machine according to claim 1, wherein the corrosion groove (36) is connected with the sliding rail (13) through a shaft three (4), and the shaft three (4) is fixedly connected with the sliding rail (13) through a key (14).
7. The novel steel wire spiral contact device suitable for the steel wire bending friction fatigue machine according to claim 6, wherein a temperature control system (38) is connected to the corrosion groove (36), and the temperature control system (38) is composed of a refrigerator, a heater and a temperature controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211582616.5A CN116202893A (en) | 2022-12-08 | 2022-12-08 | Novel steel wire spiral contact device suitable for steel wire bending friction fatigue machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211582616.5A CN116202893A (en) | 2022-12-08 | 2022-12-08 | Novel steel wire spiral contact device suitable for steel wire bending friction fatigue machine |
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| CN116202893A true CN116202893A (en) | 2023-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211582616.5A Pending CN116202893A (en) | 2022-12-08 | 2022-12-08 | Novel steel wire spiral contact device suitable for steel wire bending friction fatigue machine |
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| CN (1) | CN116202893A (en) |
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- 2022-12-08 CN CN202211582616.5A patent/CN116202893A/en active Pending
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