A stainless steel pipe cold-rolling inner core pipe end protection mechanism

Abstract

The utility model discloses a kind of stainless steel pipe cold-rolled inner core pipe end protection mechanism suitable for, including two groups of fixed guide base, respectively set in inner core pipe both ends position, each group of fixed guide base is equipped with the same structure of entry clamping group and exit clamping group, clamping group includes sleeve shell, bearing seat and several clamping petals, clamping petal is spherical sector plate structure, by sliding pin sliding installation in the sliding guide groove of sleeve shell and can be deflected.The fixed guide base is equipped with clockwork box inside, clockwork box output shaft connects driving tooth, for driving bearing seat or sleeve shell to occur deflection, provide clamping driving force;The clamping petal can be elastically deflected to complete to give way when pipe passes, after pipe passes, realize clamping assembly automatic reset by clockwork energy storage structure.This device can guide, position and clamping before and after inner core pipe cold-rolled, effectively improve the coaxiality and operating stability of core pipe feeding, suitable for the on-line protection and auxiliary introduction of core pipe end in stainless steel pipe continuous cold-rolled line.

Description

Technical Field

[0001] This utility model relates to the field of stainless steel processing technology, specifically to a protective mechanism for the end of a cold-rolled inner core tube of a stainless steel pipe. Background Technology

[0002] In the cold rolling process of stainless steel tubes, to ensure that the inner core tube (guide rod) maintains stable axial positioning during rolling, positioning and clamping mechanisms are usually required at both ends to prevent it from shifting or shaking during transportation, assembly, or rolling, which would affect the product's concentricity and wall thickness uniformity. Existing guide tube positioning devices mostly adopt rigid clamping blocks or spring gripper structures, which are clamped by manual preloading and then maintained in a relatively fixed state by assembly fastening.

[0003] However, such structures generally suffer from the following shortcomings: Poor clamping accuracy and stability: Traditional clamping block type clamping mechanism lacks the ability to adapt to inner core tubes of different diameters or different tolerances. The clamping surface is mostly a rigid plane or a single spring limit, which cannot adaptively deflect or adjust the clamping force according to the force state of the guide rod, which can easily lead to loose clamping or eccentric positioning.

[0004] Insufficient reset response capability: Some mechanisms that use springs or external clamping components lack rapid reset capability after the tube is inserted and removed, requiring manual intervention or having clamping lag issues, which affects production cycle and automation efficiency.

[0005] Therefore, the existing technology lacks a clamping structure that can stably clamp, automatically reset, and smoothly guide the guide rod while ensuring automated response capabilities, so as to meet the requirements of high-precision and high-reliability positioning support in cold rolling operations. Utility Model Content

[0006] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0007] Therefore, the technical solution adopted by this utility model is as follows: a protective mechanism for the end of a cold-rolled inner core tube of a stainless steel tube, comprising two fixed guide seats and a guide rod, wherein the two fixed guide seats are respectively disposed at the two end regions of the guide rod, for axial limiting and radial positioning of the two ends of the guide rod.

[0008] In a preferred embodiment, each of the fixed guide seats has an outlet clamping assembly and an inlet clamping assembly on its inner side. The outlet clamping assembly and the inlet clamping assembly have basically the same structure, specifically including a shell, a support, and several clamping segments. The sliding guide groove on the surface of the shell has a spiral structure. The shell is a spherical ring structure, and its outer side is fixed to the inner wall of the fixed guide seat. Several axially opening sliding guide grooves are provided on its inner surface. The clamping segments are spherical fan-shaped plates, and a sliding pin is provided on one side. The sliding pin is slidably installed in the sliding guide groove, so that the clamping segment can deflect around its inner edge. The other end of the clamping segment is provided with a shaft hole for rotatably connecting with a shaft pin provided on the support, so that it can achieve clamping movement under the support of the support.

[0009] In a preferred embodiment, the bearing is located at the inner center of the housing, supporting the clamping segments and limiting their deflection path. Several pins are provided on the bearing, corresponding to the shaft holes in the clamping segments, to support their deflection movement. The bearing is fixedly connected to the driving gear inside the fixed guide seat. The driving gear meshes with a spring box located inside the fixed guide seat, and the planar spiral spring structure within the spring box provides the deflection driving force for the driving gear, achieving the rotational offset of the bearing or housing.

[0010] Furthermore, as shown in the figure, an inlet is fixedly installed at one end of the guide seat. The inlet has a flared structure at its port and gradually expands away from the guide seat to guide the tube to be inserted smoothly.

[0011] In a preferred embodiment, the two ends of the guide rod are designed as tapered structures, and a certain gap is maintained between them and the inner hole of the inlet, so that the stainless steel tube can pass smoothly through the cold-rolled front end insertion process without interference or scratching.

[0012] In a preferred embodiment, the distance between the two fixed guide seats is less than the overall length of the guide rod, so that during the process of the tube entering the mechanism along the feeding direction of the guide rod, its front and rear ends can sequentially enter the inlet clamping group and the outlet clamping group. Since the concave surfaces of the clamping petals in the two clamping groups are arranged facing the inlet, the tube first contacts the concave surface of the clamping petals when inserted. When the tube is further inserted, it pushes the clamping petals to elastically deflect around the pivot pin, and at the same time slides along the sliding guide groove through the sliding pin, causing the sleeve or bearing to change angle, and the energy is stored by the spring structure inside the spring box.

[0013] In a preferred embodiment, after the tube has completely passed through the clamping area, the spring box releases its elastic force, causing the deflected sleeve or bearing to reset, thereby driving the clamping disc back to its original clamping position and completing the re-stabilization and clamping of the guide rod.

[0014] In summary, this utility model, by setting up a clamping component with a precise structure and flexible deflection, as well as an elastic mechanism with automatic driving and reset capabilities, can continuously maintain stable support and protection in the axial direction during the insertion, positioning, passage and withdrawal of the tube, significantly improving the concentricity of the guide core during the cold rolling forming process, reducing inner wall scratches, and reducing the frequency of manual intervention.

[0015] The beneficial effects achieved by this utility model are as follows: 1. In this utility model, the clamping mechanism is equipped with a clamping flap with a sliding guide groove, a shaft pin and a sliding pin, which works in conjunction with the deflection linkage between the sleeve and the bearing seat to give the clamping process good elastic response capability, realize stable clamping of the guide rod and the inserted tube surface, and ensure that they are always kept in the position of the device axis, which significantly improves the positioning accuracy in the cold rolling process.

[0016] 2. In this invention, the spring box contains a spiral spring structure, which stores energy when the clamping device is deflected by force and automatically releases it after the tube passes through, thus achieving the automatic reset function of the clamping mechanism. This design effectively avoids the problem of long-term jamming or position drift of the clamping components, improving the continuous operation capability and maintenance convenience of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model; Figure 2 This is a schematic diagram of the internal structure of the guide seat according to an embodiment of the present invention; Figure 3 This is an exploded view of the outlet clamp assembly according to an embodiment of the present invention; Figure 4 This is an exploded view of the entrance clamp assembly according to an embodiment of the present invention.

[0018] Figure label: 100. Fixed guide seat; 110. Inlet port; 120. Spring barrel; 200. Guide rod; 121. Drive gear; 300. Export clamping assembly; 310. Sleeve housing; 320. Bearing seat; 330. Clamping disc; 311. Guide groove; 321. Shaft pin; 331. Sliding pin; 332. Shaft hole; 400. Entrance clamping assembly. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0020] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0021] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a protective mechanism for the end of a cold-rolled inner core tube of a stainless steel pipe.

[0022] Combination Figures 1-4 As shown, the present invention provides an end protection mechanism for cold-rolled inner core tubes of stainless steel pipes, including a fixed guide seat 100, a guide rod 200, an outlet clamping group 300, and an inlet clamping group 400.

[0023] There are two sets of fixed guide seats 100, which are used to position the two ends of the guide rod 200 respectively. The two fixed guide seats 100 are arranged opposite each other and connected in the middle by the guide rod 200. The guide rod 200 passes through the interior of the two fixed guide seats 100 to form a support structure for the cold-rolled inner core tube.

[0024] like Figure 2 As shown, an outlet clamping assembly 300 and an inlet clamping assembly 400 are respectively installed on the inner sides of both ends of the fixed guide seat 100. The two clamping assemblies have the same structure and are used to position and clamp the guide rod 200 and the end of the tube to prevent the tube from shaking or shifting during the cold rolling process, thereby improving the cold rolling accuracy.

[0025] The outlet clamping assembly 300 includes a housing 310, a support 320, and several clamping segments 330. The support 320 is rotatably mounted inside the fixed guide seat 100 via a shaft pin 321, and is used to support and connect each clamping segment 330. Each clamping segment 330 has a spherical fan-shaped plate structure, and its inner arc surface is used to fit and clamp the outer circular surface of the guide rod 200. Each clamping segment 330 has a sliding pin 331 and a shaft hole 332 at its rear. The sliding pin 331 is slidably connected in a sliding guide groove 311 provided on the surface of the housing 310, so that the clamping segment 330 can be deflected by force during the introduction process and automatically reset by the housing 310 after detaching from the pipe; the sliding guide groove 311 on the surface of the housing 310 has a spiral structure.

[0026] The sleeve 310 is a spherical ring-shaped structure installed inside the fixed guide seat 100, capable of relative rotation, and providing elastic restoring force in the clamping state. The sleeve 310 cooperates with the clamping flap 330 through the sliding guide groove 311 to form a reliable deflection clamping structure.

[0027] Both guide seats 100 have a spring barrel 120 fixedly installed inside. The spring barrel 120 has a planar spiral spring mechanism to provide deflection driving force, and its output end is connected to the drive gear 121. The drive gear 121 is connected to the bearing 320 in the outlet clamping assembly 300 and the sleeve 310 in the inlet clamping assembly 400, respectively, thereby driving the clamping mechanisms at both ends to perform synchronous deflection, clamping and resetting operations.

[0028] like Figure 1 and Figure 2 As shown, one end of the guide seat 100 is provided with an inlet 110. The inlet 110 has a flared structure and gradually expands in the direction away from the guide seat 100. It is used to help the pipe to be quickly and accurately introduced into the central channel of the guide seat 100, so as to avoid eccentricity or deflection during the introduction process.

[0029] like Figure 1 As shown, the two ends of the guide rod 200 are tapered structures, and there is a gap between the outer diameter of the guide rod 200 and the inner diameter of the inlet 110, so that the stainless steel tube can pass smoothly through the inlet 110 and complete the positioning.

[0030] like Figure 4 As shown, during the pipe insertion process, when the front end of the guide rod 200 enters the inlet clamping assembly 400, it contacts the inner arc surface of the clamping flap 330 and applies an axial force, causing the clamping flap 330 to deflect within the sliding guide groove 311 via the sliding pin 331. Simultaneously, the sleeve 310 is driven by the spring to generate an elastic deflection and store elastic energy. As the pipe continues to pass through the outlet clamping assembly 300, the same deflection and clamping process occurs. After the pipe passes through the clamping mechanisms at both ends, the sleeve 310 and the bearing 320 complete the deflection reset action under the energy storage release of the spring box 120, and the clamping flap 330 re-adheres to the outer wall of the guide rod 200, achieving automatic reset clamping.

[0031] In this embodiment, the distance between the two fixed guide seats 100 is less than the length of the guide rod 200, so as to ensure that the outlet clamp group 300 and the inlet clamp group 400 can alternately clamp and support the guide rod 200 during the pipe insertion and passage process, so as to achieve continuous clamping and smooth introduction.

[0032] In addition, in the outlet clamp group 300 and the inlet clamp group 400, the concave surfaces of a number of clamping petals 330 are axially oriented toward the inlet port 110, ensuring that the pipe can come into contact with the inner arc surface of the clamping petals before entering the clamping structure, guiding it to smoothly transition to the clamping state, and further improving the positioning accuracy and smoothness of the introduction.

[0033] Through the above structural combination, this utility model provides a stainless steel tube cold-rolled core tube end protection mechanism that integrates guiding introduction, clamping positioning, elastic deflection and automatic repositioning. It has high structural linkage, automatic operation and use stability, and is particularly suitable for the technical requirements of core tube position control in high-precision cold rolling scenarios.

[0034] Working principle and usage process of this utility model: This utility model is applicable to the protection and positioning of the end of the inner core tube in the cold rolling process of stainless steel tubes. Its working principle is based on the synergistic effect of the elastic deflection clamping structure and the guiding positioning structure.

[0035] Under normal conditions, the planar spiral spring structure inside the spring barrel 120 provides a continuous deflection driving force to the drive gear 121, thereby driving the bearing 320 in the outlet clamping assembly 300 and the sleeve 310 in the inlet clamping assembly 400 to rotate and deflect in a relatively static state, causing them to move in conjunction with several clamping segments 330 to produce radial deflection. The clamping segments 330 move through the sliding pin 331 and the sliding guide groove 311 on the surface of the sleeve 310, so that their inner arc surface fits against the surface of the guide rod 200, thereby clamping the guide rod 200 and ensuring that it is reliably positioned at the axial position of the fixed guide seat 100 and the inlet 110.

[0036] When the stainless steel tube is inserted into the guide seat 100, it is first guided accurately through the flared structure of the inlet 110. When the front end of the tube enters the inlet clamp 400, it contacts the surface of the clamping flap 330 and applies force, causing the clamping flap 330 to elastically deflect under the support of the shaft pin 321. This causes the sleeve 310 in the inlet clamp 400 to elastically rotate and deform, while the mainspring inside the mainspring box 120 further stores energy, forming a clamping preparation state.

[0037] As the pipe continues to advance and enters the outlet clamp 300, the aforementioned deflection process is repeated, causing the clamp 330 to engage with the sleeve 310 to complete another elastic deflection. Throughout the process, the clamp 330 maintains continuous elastic contact with the outer wall of the pipe, forming a sliding clamping state, effectively guiding the pipe through in the axial direction without deviation.

[0038] After the pipe has completely passed through the area of ​​the fixed guide seat 100, the energy storage structure inside the spring box 120 releases its elastic force, causing the bearing 320 in the outlet clamp 300 and the sleeve 310 in the inlet clamp 400 to complete their reset deflection action. The clamping disc 330 returns to its original position, providing stable support to the surface of the guide rod 200 again, thus realizing the automatic reset and multiple cycles of the device. During the pipe insertion process, the outlet clamp 300 or the inlet clamp 400 always maintains clamping and positioning on one end of the guide rod 200 to prevent displacement of the guide rod 200 during pipe movement.

[0039] This mechanism effectively ensures the positioning accuracy and clamping reliability of the mandrel end during the cold rolling process of stainless steel tubes through the synergistic effect of active deflection, elastic clamping and guide reset, avoiding finished product errors or equipment damage caused by mandrel offset or shaking.

[0040] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A protective mechanism for the end of a cold-rolled inner core tube of a stainless steel pipe, characterized in that, include: The guide seat (100) and the guide rod (200) are provided. There are two sets of guide seats (100) and they are used to position the two ends of the guide rod (200). The two ends of the inner side of the guide seat (100) are respectively provided with an outlet clamp group (300) and an inlet clamp group (400). The spring box (120) is fixedly installed on the inner side of the guide seat (100). The outlet clamp group (300) and the inlet clamp group (400) have the same structure and each includes a shell (310), a support (320) and several clamping segments (330). The spring box (120) is rotatably sleeved on the inner side of the shell (310). The clamping segments (330) 330) is a spherical fan-shaped plate, and its surface is provided with sliding pins (331) and shaft holes (332). The surface of the bearing (320) is provided with several shaft pins (321) which are sleeved on the inner side of the shaft hole (332) to support the clamping petals (330) to achieve deflection movement. The surface of the sleeve (310) is provided with several sliding guide grooves (311), and the sliding pins (331) are slidably sleeved on the inner side of the sliding guide grooves (311). The inner sides of the two spring boxes (120) are rotatably equipped with active teeth (121), which are respectively connected to the bearing (320) of the outlet clamping group (300) and the sleeve (310) of the inlet clamping group (400).

2. The end protection mechanism for cold-rolled inner core tubes of stainless steel pipes according to claim 1, characterized in that, One end of the fixed guide seat (100) is fixedly installed with an inlet (110). The inlet (110) is horn-shaped and gradually expands in the direction away from the fixed guide seat (100).

3. The end protection mechanism for cold-rolled inner core tubes of stainless steel pipes according to claim 1, characterized in that, The guide rod (200) has tapered ends, and there is a gap between the outer side of the guide rod (200) and the inner side of the inlet (110) for conveying the stainless steel pipe.

4. The end protection mechanism for cold-rolled inner core tubes of stainless steel pipes according to claim 1, characterized in that, The inner side of the spring box (120) is provided with a planar spiral spring structure, which is used to drive the active tooth (121) to deflect.

5. A protective mechanism for the end of a cold-rolled inner core tube of a stainless steel pipe according to claim 1, characterized in that, The sliding guide groove (311) on the surface of the sleeve (310) has a spiral structure. The sleeve (310) has a spherical ring structure. The guide rod (200) passes through the inner side of the active tooth (121), the sleeve (310) and the bearing (320), and the guide rod (200) is clamped on the surface of the guide rod (200) by the deflection of the clamping petals (330).

6. The end protection mechanism for cold-rolled inner core tubes of stainless steel pipes according to claim 1, characterized in that, The distance between the two fixed guide seats (100) is less than the length of the guide rod (200) so that the guide rod (200) surface can be clamped and positioned alternately during the passage of the stainless steel tube.

7. The end protection mechanism for cold-rolled inner core tubes of stainless steel pipes according to claim 1, characterized in that, The concave surfaces of the clamping petals (330) of the outlet clamping group (300) and the inlet clamping group (400) are axially oriented toward the inlet (110) of the guide seat (100).

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