A titanium alloy small-size rod ultrafine grain rolling device and method

Abstract

The present invention discloses a titanium alloy small-size rod ultrafine grain structure rolling equipment and method, comprising a finishing rolling unit, wherein a plurality of rolling channels are sequentially arranged in a horizontal direction on the finishing rolling unit, during the rolling process, the titanium alloy rod sequentially enters and exits the plurality of rolling channels with gradually decreasing rolling sizes, and further comprises a U-shaped track, which is used to connect two rolling channels at adjacent positions, and the titanium alloy rod enters the next rolling channel after passing through the U-shaped track from the previous rolling channel; a traction mechanism is arranged in the U-shaped track, and is clamped at one end of the titanium alloy rod to traction the titanium alloy rod to move from one end of the U-shaped track to the other end.

Description

Technical Field

[0001] The invention relates to the technical field related to metal rolling, in particular to a device and method for rolling ultrafine grain structure of small-sized titanium alloy rods. Background Art

[0002] It is well known that during the rolling process, small-sized titanium alloy rods (diameter 1-30 mm, length 100-1000 mm) pass through a gradually decreasing rolling size channel on a finishing mill, so that the radial size of the small-sized titanium alloy rods is gradually reduced during the rolling process until the required radial size is reached.

[0003] The finishing rolling unit is mainly composed of 8 frames, a speed increaser, a large base, an arc-tooth coupling, a water baffle, a safety cover, a guide, etc. It can continuously roll titanium alloy bars with micro-tension through 8 frames to reduce the cumulative temperature rise of the bars during the rolling process.

[0004] During the rolling process of small-size titanium alloy bars, the titanium alloy bars are subjected to high-temperature heating treatment before rolling, and then the titanium alloy bars need to pass through rolling channels of different specifications on the finishing rolling unit, and the two adjacent rolling channel ports are flush. For the rolled bars, the bars need to turn 180 degrees to enter the next rolling channel port from the previous rolling channel port. In the prior art, there is a method of using a manual handheld clamp to clamp the end of the bar, and while pulling the bar, a force is applied to the bar to bend it so that it can enter the port of the next rolling channel. There is also a method of setting an arc channel between two adjacent rolling channel ports so that the bar can enter the next rolling channel port from the previous rolling channel port.

[0005] According to the above, the shortcoming of the prior art is that the titanium alloy bar after high-temperature treatment enters the next rolling channel from the previous rolling channel. For the staff, it is not only necessary to be subjected to high temperature baking but also to provide a large force to bend the bar, which undoubtedly increases the labor intensity of the staff. In theory, a circular arc channel can be set for the rolled bars to pass through, but it is found in practice that when the bar enters the circular arc channel, there is an interaction force between the two, which can easily cause the end of the titanium alloy bar after high-temperature treatment to deform, thereby affecting the rolling effect of the titanium alloy bar. Summary of the invention

[0006] The purpose of the present invention is to provide a titanium alloy small-sized rod ultrafine grain structure rolling equipment and method to solve the technical problems in the related art.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A titanium alloy small-size rod ultrafine grain rolling equipment, including a finishing rolling unit, wherein a plurality of rolling channels are sequentially arranged in the horizontal direction on the finishing rolling unit, and during the rolling process, the titanium alloy rods sequentially enter and exit the plurality of rolling channels with gradually decreasing rolling sizes, and also includes a U-shaped track, which is used to connect two rolling channels at adjacent positions, and the titanium alloy rods enter the next rolling channel after passing through the U-shaped track from the previous rolling channel; a traction mechanism is arranged in the U-shaped track, and is clamped at one end of the titanium alloy rod to traction the titanium alloy rod to move from one end of the U-shaped track to the other end.

[0009] As mentioned above, the traction mechanism includes a clamping part, and a track is provided in the U-shaped track for the clamping part to move back and forth; after the clamping part clamps the end of the titanium alloy rod, it moves from one end of the U-shaped track to the other end based on the moving force of the titanium alloy rod; a roller body is provided at the other end of the U-shaped track, and the clamping part and the roller body are connected by a rope. When the titanium alloy rod drives the roller body to rotate, the roller body reels the rope to bring the clamping part back to one end of the U-shaped track.

[0010] As mentioned above, the track is provided with two groups in sequence in the radial direction, each group of tracks has two tracks and is symmetrically arranged on the upper and lower inner bottom surfaces of the U-shaped track in the axial direction; the clamping part includes a slider slidably arranged in each track, and a telescopic part is jointly arranged between the two sliders at the upper and lower relative positions, and each telescopic part is provided with a clamping block. The two telescopic parts extend at the same time to drive the respectively connected clamping blocks to jointly clamp the end of the titanium alloy rod.

[0011] As mentioned above, the telescopic member includes a first block and a second block, the second block is slidably arranged on the first block and a first elastic member is connected between the two, two rods are also slidably arranged on the first block, and a second elastic member is arranged between each rod and the first block, each rod is correspondingly connected to a slider, and a transmission member is also arranged in the first block; when the two rods approach each other, the second block extends out of the first block due to the elastic force of the first elastic member, so that the two clamps jointly clamp the end of the titanium alloy rod; when the two rods move away from each other, the second block is driven to retract into the first block through the transmission member, so that the two clamps jointly remove the clamping of the end of the titanium alloy rod; each of the tracks is composed of a first section and a second section connected end to end, and the two rods gradually approach each other during the movement of the slider in the first section; when the slider enters the second section from the first section, the two rods move away from each other; during the movement of the slider in the second section, the distance between the two rods remains unchanged; when the slider enters the first section from the second section, the two rods approach each other.

[0012] As mentioned above, in the radial direction, the distance between the two first strips is smaller than the distance between the two second strips.

[0013] As mentioned above, the clamping block is provided with an obstruction surface and a clamping surface, and the two clamping blocks have two positions at one end of the U-shaped track: in the first position, the two obstruction surfaces are parallel to the end surface of the U-shaped track, and the two clamping surfaces are at an angle with the end surface of the U-shaped track, and in the process of the titanium alloy rod entering the U-shaped track, the two obstruction surfaces form an obstruction on the moving path of the titanium alloy rod; in the second position, the two obstruction surfaces obstruct the movement of the titanium alloy rod, and change from being parallel to the end surface of the U-shaped track to having an angle with the end surface of the U-shaped track, and continue to produce an obstructive effect on the movement of the titanium alloy rod, and the two clamping surfaces change from having an angle with the end surface of the U-shaped track to being parallel to the end surface of the U-shaped track, and clamp the end of the titanium alloy rod.

[0014] As mentioned above, the transmission member includes two transmission rods arranged crosswise with each other, the two rod bodies correspond to the two transmission rods one by one, one end of each transmission rod is hinged to the corresponding rod body, and the other end is hinged to a third block, the third block is slidably arranged in the first block, and the sliding direction is the same as the sliding direction of the second block on the first block, two fourth blocks are fixedly connected to the second block, each fourth block corresponds to a third block, when the two rod bodies approach each other, the third block does not generate a force on the fourth block, and when the two rod bodies move away from each other, the third block generates a force on the fourth block to make the first block retract into the second block.

[0015] As mentioned above, the length of the U-shaped track is greater than the length of the titanium alloy bar being rolled.

[0016] As mentioned above, each of the rods is rotatably arranged with respect to the corresponding slider, and the included angle of the rotation path of the rod on the slider is the same as the included angle of the obstruction surface when it changes from a vertical state to an inclined state.

[0017] The present invention also relates to a method for rolling a titanium alloy small-sized rod with ultrafine grain structure, wherein the method for rolling a titanium alloy small-sized rod with ultrafine grain structure by the above-mentioned titanium alloy small-sized rod with ultrafine grain structure rolling equipment comprises the following steps:

[0018] Step 1: Titanium alloy bar rolling: sending the titanium alloy bar that has undergone rough rolling to a finishing mill for finishing rolling;

[0019] Step 2: Change of rolling size. The titanium alloy bar enters the U-shaped track from the previous rolling channel of the finishing mill. The traction mechanism clamps one end of the titanium alloy bar to pull the titanium alloy bar from one end of the U-shaped track to the other end. Then the titanium alloy bar enters the next rolling channel for rolling with a smaller size, and so on, until the rolled size of the titanium alloy bar meets the requirements.

[0020] The beneficial effects of the present invention are as follows: by setting up a traction mechanism, it is possible to simulate a worker holding a clamp to clamp the end of a rod, and while the rod is being pulled along the trajectory of the U-shaped track, a force is applied to the rod to bend it so that it can pass through the U-shaped track and enter the next rolling channel. This can reduce the interaction between the end of the rod and the inner wall of the arc segment of the U-shaped track, thereby avoiding deformation of the end of the rod, and can also reduce the labor intensity of the workers. The setting of the U-shaped track can reduce the heat dissipation of the titanium alloy rod, thereby reducing the degree to which the workers are burned by high temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 A schematic diagram of the three-dimensional structure of a U-shaped track of a titanium alloy small-sized rod ultrafine grain rolling equipment in an embodiment provided by the present invention;

[0023] Figure 2 A schematic diagram of a U-shaped track radial cross-section structure of a titanium alloy small-size rod ultrafine grain rolling device in an embodiment provided by the present invention;

[0024] Figure 3 A schematic diagram of the planar structure of a titanium alloy small-size rod ultrafine grain structure rolling device provided in the embodiment of the present invention when the clamping part clamps the end of the titanium alloy rod;

[0025] Figure 4 A schematic diagram of the planar structure of a titanium alloy small-size rod ultrafine grain structure rolling device provided in the embodiment of the present invention when the clamping part of the titanium alloy rod end is removed;

[0026] Figure 5 A schematic diagram of the planar structure of a clamping block of a titanium alloy small-sized rod ultrafine grain rolling device in an embodiment provided by the present invention;

[0027] Figure 6 A schematic diagram of the coordinated planar structure of a stopper groove and a stopper block of a titanium alloy small-size rod ultrafine grain rolling device in an embodiment provided by the present invention;

[0028] Figure 7 A schematic diagram of the planar structure of a titanium alloy small-size rod ultrafine grain rolling device when the second block is retracted into the first block in an embodiment provided by the present invention;

[0029] Figure 8This is a schematic diagram of the planar structure of a titanium alloy small-size rod ultrafine grain rolling device in an embodiment provided by the present invention when the second block extends out of the first block.

[0030] Description of reference numerals:

[0031] 1. U-shaped track; 10. Titanium alloy rod; 11. Roller; 12. Rope; 2. Clamping part; 20. Slider; 21. Telescopic part; 210. First block; 211. Second block; 212. Rod; 22. Transmission part; 220. Transmission rod; 221. Third block; 222. Fourth block; 223. Stopper; 23. Clamping block; 230. Obstruction surface; 231. Clamping surface; 24. Limiting groove; 25. Limiting block; 3. Track; 30. First section; 31. Second section. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solution of the present invention, Figure 1 To Attachment Figure 8 The present invention is further described in detail.

[0033] The embodiment provided by the present invention relates to a titanium alloy small-size rod ultrafine grain structure rolling equipment, including a finishing rolling mill group, on which a plurality of rolling channels are sequentially arranged in the horizontal direction. During the rolling process, the titanium alloy rod 10 sequentially enters and exits the plurality of rolling channels with gradually decreasing rolling sizes. The finishing mill group also includes a U-shaped track 1, which is used to connect two rolling channels at adjacent positions. The titanium alloy rod 10 passes through the U-shaped track 1 from the previous rolling channel and enters the next rolling channel; a traction mechanism is arranged in the U-shaped track 1, which is clamped at one end of the titanium alloy rod 10 to pull the titanium alloy rod 10 from one end of the U-shaped track 1 to the other end.

[0034] Specifically, a plurality of rolling channels are arranged in a horizontal direction on the frame of the finishing rolling mill, and the length direction of the rolling channels is parallel to the horizontal plane, and the length direction of the rolling channels is perpendicular to the arrangement direction of the plurality of rolling channels. For the convenience of description, the rolling channels are named No. 1, No. 2, No. 3, etc. in the direction in which the rolling size gradually decreases. The left and right sides of the frame correspond to the left and right ends of each rolling channel. During the rolling process of the titanium alloy bar 10, it enters from the left end of No. 1 and exits from the right end, then enters from the right end of No. 2 and exits from the left end, then enters from the left end of No. 3 and exits from the right end, and so on.

[0035] The U-shaped track 1 provided in this embodiment is provided between two adjacent rolling channels, that is, when the U-shaped track 1 is provided between No. 1 and No. 2, one end of the U-shaped track 1 is connected to the right end of No. 1, and the other end of the U-shaped track 1 is connected to the right end of No. 2; when the U-shaped track 1 is provided between No. 2 and No. 3, one end of the U-shaped track 1 is connected to the left end of No. 2, and the other end of the U-shaped track 1 is connected to the left end of No. 3. The U-shaped track 1 is provided between the other two adjacent rolling channels in the same manner as above. Figure 1 In the direction of the arrow at a, the U-shaped channel 1 is provided with one end of the titanium alloy rod 10. Figure 1 In the direction of the arrow marked at b in the figure, the U-shaped track 1 and the rolling channel can be connected through a flange.

[0036] During operation, the titanium alloy rod 10 coming out of the rolling channel needs to enter the next rolling channel to continue rolling, and then the titanium alloy rod 10 directly enters one end of the U-shaped track 1 from point a. When the end of the titanium alloy rod 10 just enters the U-shaped track 1, the traction mechanism clamps the end of the titanium alloy rod 10, and then pulls the titanium alloy rod 10 from one end of the U-shaped track 1 to the other end, and then one end of the titanium alloy rod 10 gradually leaves the U-shaped track 1 from point b and enters the next rolling channel, wherein the traction mechanism is integrated with a clamp for clamping the end of the titanium alloy and a driving source for driving the clamp to move along the track of the U-shaped track 1.

[0037] The beneficial effect of this embodiment is that: by setting up a traction mechanism, it is possible to simulate a worker holding a clamp to clamp the end of the rod 10. While the rod 10 is pulled along the trajectory of the U-shaped track 1, a force is applied to the rod 10 to bend it so that it can pass through the U-shaped track 1 and enter the next rolling channel. This can reduce the interaction between the end of the rod 10 and the inner wall of the arc segment of the U-shaped track 1, thereby avoiding deformation of the end of the rod 10 and reducing the labor intensity of the workers. The setting of the U-shaped track 1 can reduce the heat dissipation of the titanium alloy rod 10, thereby reducing the degree of high temperature roasting of the workers.

[0038] Preferably, the traction mechanism includes a clamping part 2, and a track 3 is provided in the U-shaped track 1 for the clamping part 2 to move back and forth; after the clamping part 2 clamps the end of the titanium alloy rod 10, it moves from one end of the U-shaped track 1 to the other end based on the moving force of the titanium alloy rod 10; the other end of the U-shaped track 1 is provided with a roller body 11, and the clamping part 2 and the roller body 11 are connected by a rope 12. When the titanium alloy rod 10 drives the roller body 11 to rotate, the roller body 11 reels the rope 12 to bring the clamping part 2 back to one end of the U-shaped track 1.

[0039] Specifically, since the titanium alloy rod 10 will be rolled by the rolling roller when passing through the rolling channel, a forward force will be applied to the titanium alloy rod 10 when being rolled. For example, in No. 1, the titanium alloy rod 10 will be subjected to a thrust from left to right. Therefore, in this embodiment, the thrust applied to the titanium alloy rod 10 is utilized. After the clamping portion 2 clamps the end of the titanium alloy rod 10, the movement of the titanium alloy rod 10 will drive the clamping portion 2 to move in the track 3 for the movement of the clamping portion 2 in the U-shaped track 1. In this way, the traction force on the titanium alloy rod 10 comes from the force transmitted by the titanium alloy rod 10 itself. When the clamping portion 2 and the end of the titanium alloy rod 10 reach the other end of the U-shaped track 1 together, the clamping portion 2 removes the clamping of the end of the titanium alloy rod 10, and then the titanium alloy rod 10 will continue to be pushed into the next rolling channel, and after one end of the titanium alloy rod 10 enters the next rolling channel, a forward force will be applied to it when being rolled by the rolling roller. A forward force, such as in No. 2, the titanium alloy rod 10 will be subjected to a thrust from right to left, so the titanium alloy rod 10 can continuously pass through each rolling channel in the process of rolling size from large to small, wherein after the clamping portion 2 removes the clamping of the end of the titanium alloy rod 10, the titanium alloy rod 10 continues to move and will have rolling friction contact with the roller body 11, so that the roller body 11 rotates to reel in the rope 12 connected thereto, and the rope 12 is arranged in the outer wall of the U-shaped track 1, and in the process of pulling the clamping portion 2 from one end to the other end of the U-shaped track 1, the rope 12 is pulled out from the roller body 11, and conversely, when the roller body 11 is driven to rotate by the titanium alloy rod 10, the rope 12 is reeled in, then the driving force required for the reciprocating motion of the clamping portion 2 comes from the titanium alloy rod 10, so there is no need to set up an additional driving source, and passive traction of each titanium alloy rod 10 that needs to be rolled can be achieved.

[0040] Preferably, the rails 3 are provided with two groups in sequence in the radial direction, each group of rails 3 has two rails 3 and are axially symmetrically arranged on the upper and lower inner bottom surfaces of the U-shaped track 1; the clamping part 2 includes a slider 20 slidably arranged in each rail 3, and a telescopic member 21 is commonly arranged between the two sliders 20 at upper and lower relative positions, and each telescopic member 21 is provided with a clamping block 23, and the two telescopic members 21 extend at the same time to drive the respectively connected clamping blocks 23 to jointly clamp the end of the titanium alloy rod 10.

[0041] Specifically, the trajectories of the two tracks 3 are basically the same as the trajectory of the U-shaped track 1. The two sliders 20 in each group of two tracks 3 are connected to a telescopic member 21, so that each telescopic member 21 can move stably in the U-shaped track 1. When the titanium alloy rod 10 enters one end of the U-shaped track 1, the telescopic member 21 is driven to extend and drive the clamping block 23 close to the titanium alloy rod 10, so that the two clamping blocks 23 will clamp the titanium alloy rod 10 together, wherein the telescopic member 21 can be separately provided with a driving source to realize the telescopic function, such as an electric telescopic rod. In this embodiment, since the titanium alloy rod 10 has been subjected to high-temperature treatment, a passive clamping action for the titanium alloy rod 10 can be adopted.

[0042] That is, in a further embodiment, the telescopic member 21 includes a first block 210 and a second block 211, the second block 211 is slidably arranged on the first block 210 and a first elastic member is connected therebetween, two rods 212 are also slidably arranged on the first block 210, and a second elastic member is provided between each rod 212 and the first block 210, each rod 212 is correspondingly connected to a slider 20, and a transmission member 22 is also provided in the first block 210; when the two rods 212 approach each other, the second block 211 is extended out of the first block 210 by the elastic force of the first elastic member, so that the two clamping blocks 23 jointly clamp the ends of the titanium alloy rod 10; in the two When the rod bodies 212 move away from each other, the second block 211 is driven to retract into the first block 210 through the transmission member 22, so that the two clamping blocks 23 jointly remove the clamping of the end of the titanium alloy rod 10; each of the tracks 3 is composed of a first section 30 and a second section 31 connected end to end, and the two rod bodies 212 gradually approach each other during the movement of the slider 20 in the first section 30; when the slider 20 enters the second section 31 from the first section 30, the two rod bodies 212 move away from each other; during the movement of the slider 20 in the second section 31, the distance between the two rod bodies 212 remains unchanged; when the slider 20 enters the first section 30 from the second section 31, the two rod bodies 212 approach each other.

[0043] Specifically, the first block 210 and the second block 211 can both be rectangular blocks, and the volume of the second block 211 is smaller than that of the first block 210. The second block 211 is slidably arranged in the length direction of the first block 210, and the second block 211 can be telescopically moved on the first block. The first elastic member connected between the two can make the second block 211 have a tendency to always extend out of the first block 210. The two rod bodies 212 arranged in the first block 210 are both cylindrical, and the axial center lines of the two coincide. Each rod body 212 is connected to a corresponding slider 20. When the two rod bodies 212 are squeezed by external force, they can be retracted into the first block 210 to approach each other, or extend out of the first block 210 to move away from each other.

[0044] Then, in this embodiment, this feature is utilized to change the structure of the track 3, that is, the depth of the first section 30 of each track 3 gradually decreases in the axial direction from one end to the other end of the U-shaped track 1. In this way, when the two sliders 20 of each group slide in the corresponding first section 30, the distance between the two sliders 20 will be shortened. Then, the mutual approach of the two sliders 20 will produce an extrusion effect on the rod bodies 212 connected to each other, so that the rod bodies 212 are retracted into the first block 210. In this way, the two rod bodies 212 on the same first block 210 are close to each other, and the elastic force of the second elastic member will also become larger. At this time, the transmission member 22 does not transmit the power when the two rod bodies 212 retract into the first block 210, and the second block 211 will extend out of the first block 210 under the elastic force of the first elastic member to drive the clamping block 23 to clamp the end of the ferroalloy rod 10. When the slider 20 enters the second section 31 from the first section 30, the two rod bodies 212 are separated from each other, that is, the axial depth of the second section 31 at the other end of the U-shaped track 1 is large. When the first section 30 is at the axial depth of the other end of the U-shaped track 1, the rod 212 then extends out of the first block 210 under the rebound force of the second elastic member. The transmission member 22 transmits the power of the two rods 212 extending out of the first block 210, so that the second block 211 overcomes the elastic force of the first elastic member and retracts into the first block 210, thereby driving the clamping block 23 to remove the clamping of the end of the titanium alloy rod 10. When the slider 20 enters the first section 30 from the second section 31, the two rods 212 approach each other, and the transmission member 2 At this time, the power of the two rod bodies 212 retracting into the first block 210 is still not transmitted, and the second block 211 will extend out of the first block 210 under the elastic force of the first elastic member to drive the clamping block 23 to clamp the end of the ferroalloy bar 10, which means that the axial depth of the first section 30 at one end of the U-shaped track 1 is smaller than the axial depth of the second section 31 at one end of the U-shaped track 1. At one end of the U-shaped track 1, an inclined surface can be provided between the second section 31 and the first section 30 to allow the slider 20 to enter the first section 30 from the second section 31.

[0045] In an optional embodiment, the transmission member 22 includes two transmission rods 220 arranged crosswise with each other, the two rod bodies 212 correspond one to one with the two transmission rods 220, one end of each transmission rod 220 is hinged to the corresponding rod body 212, and the other end is hinged to a third block 221, the third block 221 is slidably arranged in the first block 210, and the sliding direction is the same as the sliding direction of the second block 211 on the first block 210, two fourth blocks 222 are fixedly connected to the second block 211, each fourth block 222 corresponds to a third block 221, when the two rod bodies 212 approach each other, the third block 221 does not generate a force on the fourth block 222, and when the two rod bodies 212 move away from each other, the third block 221 generates a force on the fourth block 222 so that the first block 210 retracts into the second block 211.

[0046] Specifically, when the rod 212 is compressed into the first block 210, the transmission rod 220 connected thereto can push the third block 221 to move in the direction in which the second block 211 extends out of the first block 210. At this time, the third block 221 does not generate a thrust force on the fourth block 222. When the rod 212 is extended out of the first block 210 by the rebound force of the second elastic member, the transmission rod 220 connected thereto pulls the third block 221 to move in the direction in which the second block 211 retracts into the first block 210. At this time, the third block 221 exerts a thrust force on the fourth block 222. 222 generates a thrust, so that the second block 211 retracts into the first block 210, that is, a unidirectional stopper 223 is set on the third block 221, and the stopper 223 is located on the side of the fourth block 222 extending out of the first block 210 toward the second block 211. In this way, the third block 221 can achieve a unidirectional push on the fourth block 222, that is, when the slider 20 moves in the first section 30, the second block 211 can be telescopically moved on the first block 210, and under the elastic force of the first elastic member, the clamping block 23 is driven to clamp the end of the titanium alloy rod 10 without being affected.

[0047] During the movement of the slider 20 in the second section 31, the distance between the two rod bodies 212 remains unchanged, that is, when the slider 20 enters the second section 31 from the first section 30, the two rod bodies 212 move away from each other, and at this time the second block 211 retracts into the first block 210, and the clamping block 23 removes the clamping of the end of the titanium alloy rod 10. The movement of the slider 20 in the second section 31 is a journey from the other end of the U-shaped track 1 back to one end. Therefore, during this process, the clamping block 23 will not contact the surface of the titanium alloy rod 10, avoiding scratches on the surface of the titanium alloy rod 10. Also, when the slider 20 enters the first section 30 from the second section 31, the two rod bodies 212 approach each other, and at this time the tail end of the titanium alloy rod 10 should also be away from one end of the U-shaped track 1, so the length of the U-shaped track 1 should be greater than the length of the titanium alloy rod 10 being rolled.

[0048] When the slider 20 slides along the first section 30, the two rods 212 are gradually retracted into the first block 210. At this time, the second block 211 tends to always extend out of the first block 210 due to the elastic force of the first elastic member, and it is also feasible for the second block 211 to retract into the first block 210 due to the external force. Therefore, in order to increase the force of the clamping block 23 to clamp the end of the titanium alloy rod 10 and prevent the clamping block 23 from detaching from the end of the titanium alloy rod 10, in an optional embodiment, in the radial direction, the distance between the two first strips is smaller than the distance between the two second strips. In this way, when the slider 20 moves in the first section 30, the distance between the two first blocks 210 is also getting closer. Then the first block 210 will squeeze the first elastic member, and the first elastic member squeezes the second block 211, thereby increasing the clamping force of the two clamping blocks 23 on the end of the titanium alloy rod 10.

[0049] In the aforementioned embodiment, after the clamping portion 2 clamps the end of the titanium alloy rod 10, it is driven to move from one end of the U-shaped track 1 to the other end based on the movement of the titanium alloy rod 10. It can be seen from the aforementioned embodiment that the extension and retraction of the telescopic member 21 is achieved by the depth change of the track 3. Therefore, the two clamping blocks 23 clamp the ends of the titanium alloy rod 10, and the structure of the clamping blocks 23 also needs to be configured to achieve passive clamping.

[0050] That is, in a further embodiment, the clamping block 23 is provided with an obstruction surface 230 and a clamping surface 231, and the two clamping blocks 23 have two positions when they are at one end of the U-shaped track 1: in the first position, the two obstruction surfaces 230 are parallel to the end surface of the U-shaped track 1, and the two clamping surfaces 231 are at an angle with the end surface of the U-shaped track 1. When the titanium alloy rod 10 enters the U-shaped track 1, the two obstruction surfaces 230 form an obstruction on the moving path of the titanium alloy rod 10; in the second position, the two obstruction surfaces 230 obstruct the movement of the titanium alloy rod 10 from being parallel to the U-shaped track 1. The end face state of the U-shaped track 1 changes to a state in which an angle is formed with the end face of the U-shaped track 1, and continues to hinder the movement of the titanium alloy rod 10, and the two clamping surfaces 231 change from a state in which an angle is formed with the end face of the U-shaped track 1 to a state in which the end face of the U-shaped track 1 is parallel to the end face of the U-shaped track 1, and clamp the end of the titanium alloy rod 10; each of the rod bodies 212 is rotatably arranged between the corresponding slider 20, and the angle of the rotation path of the rod body 212 on the slider 20 is the same as the angle when the obstruction surface 230 changes from a state in which an angle is formed with the end face of the U-shaped track 1 to a state in which an angle is formed with the end face of the U-shaped track 1.

[0051] Specifically, the position change of the blocking surface 230 and the clamping surface 231 requires the rotation of the rod body 212, so each rod body 212 is rotatably set on the corresponding slider 20, and the rotation angle is limited, that is, the angle of the rotation path of the rod body 212 on the slider 20 is the same as the angle when the blocking surface 230 changes from being parallel to the end face of the U-shaped track 1 to being at an angle with the end face of the U-shaped track 1. For example, an arc-shaped limiting groove 24 is provided on the slider 20, and a limiting block 25 is slidably set in the limiting groove 24. In the sliding direction, a third elastic member is connected between the limit block 25 and the limit groove 24. Under the elastic force of the third elastic member, the rod body 212 has a tendency to always swing to keep the blocking surface 230 parallel to the end surface of the U-shaped track 1. The rod body 212 is fixedly connected to the limit block 25. The angle of the moving path of the limit block 25 in the limit groove 24 is the same as the angle when the blocking surface 230 changes from being parallel to the end surface of the U-shaped track 1 to being at an angle with the end surface of the U-shaped track 1. In this way, when the slider 20 moves from the second section After the titanium alloy rod 10 enters the first section 30, under the action of the third elastic member, the blocking surface 230 can be directly parallel to the end surface of the U-shaped track 1, so that when the titanium alloy rod 10 enters one end of the U-shaped track 1, it will be blocked by the blocking surface 230, but the rod body 212 will rotate on the slider 20, so under the thrust of the titanium alloy rod 10, the blocking surface 230 changes from being parallel to the end surface of the U-shaped track 1 to being at an angle with the end surface of the U-shaped track 1, and at the same time, the clamping surface 231 changes from being at an angle with the end surface of the U-shaped track 1 to being at an angle with the end surface of the U-shaped track 1. In order to be parallel to the end face of the U-shaped track 1 and form a clamping action on the end of the titanium alloy rod 10, to ensure that the movement of the titanium alloy rod 10 can smoothly drive the movement of the two clamping blocks 23, the closest distance between the two obstruction surfaces 230 parallel to the end face of the U-shaped track 1 is smaller than the radial dimension of the titanium alloy rod 10. In this way, it is difficult for the titanium alloy rod 10 to escape from between the two clamping blocks 23, thereby utilizing the thrust of the titanium alloy rod 10 to achieve passive clamping of the end of the titanium alloy rod 10 by the two clamping blocks 23.

[0052] The present invention also relates to a method for rolling a titanium alloy small-sized rod with ultrafine grain structure, wherein the method for rolling a titanium alloy small-sized rod with ultrafine grain structure by the above-mentioned titanium alloy small-sized rod with ultrafine grain structure rolling equipment comprises the following steps:

[0053] Step 1: rolling the titanium alloy bar 10, sending the titanium alloy bar 10 that has undergone rough rolling to a finishing rolling unit for finishing rolling;

[0054] Step 2: Change of rolling size. The titanium alloy bar 10 enters the U-shaped track 1 from the previous rolling channel of the finishing mill. The traction mechanism is clamped at one end of the titanium alloy bar 10 to pull the titanium alloy bar 10 from one end of the U-shaped track 1 to the other end. Then the titanium alloy bar 10 enters the next rolling channel for a smaller rolling operation, and so on, until the rolled size of the titanium alloy bar 10 meets the requirements.

[0055] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A titanium alloy small-size rod ultrafine grain rolling equipment, comprising a finishing mill, wherein the finishing mill is provided with a plurality of rolling channels in sequence along the horizontal direction, and during the rolling process, the titanium alloy rods sequentially enter and exit the plurality of rolling channels with gradually decreasing rolling sizes, characterized in that: Also includes: A U-shaped track is used to connect two rolling channels at adjacent positions. The titanium alloy bar passes through the U-shaped track from the previous rolling channel and then enters the next rolling channel; A traction mechanism is disposed in the U-shaped track and is clamped on one end of the titanium alloy rod to pull the titanium alloy rod from one end of the U-shaped track to the other end; The traction mechanism includes a clamping part, and a track for the clamping part to move back and forth is provided in the U-shaped track; after the clamping part clamps the end of the titanium alloy rod, it moves from one end of the U-shaped track to the other end based on the moving force of the titanium alloy rod; a roller body is provided at the other end of the U-shaped track, and the clamping part and the roller body are connected by a rope. When the titanium alloy rod drives the roller body to rotate, the roller body reels the rope to bring the clamping part back to one end of the U-shaped track. Two groups of tracks are sequentially provided in the radial direction, and each group of tracks has two tracks and is symmetrically provided on the upper and lower inner bottom surfaces of the U-shaped track in the axial direction; the clamping part includes A slider is slidably arranged in each track, a telescopic member is commonly arranged between two sliders at upper and lower relative positions, each telescopic member is provided with a clamping block, and the two telescopic members are extended simultaneously to drive the clamping blocks connected to them to clamp the ends of the titanium alloy rods together, the telescopic member comprises a first block and a second block, the second block is slidably arranged on the first block and a first elastic member is connected therebetween, two rods are also slidably arranged on the first block, and a second elastic member is arranged between each rod and the first block, each rod is correspondingly connected with a slider, and a transmission member is also arranged in the first block; When the two rods are close to each other, the second block is extended out of the first block by the elastic force of the first elastic member, so that the two clamping blocks clamp the end of the titanium alloy rod together; when the two rods are away from each other, the second block is driven to retract into the first block through the transmission member, so that the two clamping blocks jointly remove the clamping of the end of the titanium alloy rod; Each of the tracks consists of a first section and a second section connected end to end. When the slider moves in the first section, the two rods gradually approach each other; when the slider enters the second section from the first section, the two rods move away from each other; when the slider moves in the second section, the distance between the two rods remains unchanged; when the slider enters the first section from the second section, the two rods approach each other.

2. The ultrafine grain rolling equipment for small-sized titanium alloy rods according to claim 1 is characterized in that: In the radial direction, the distance between the two first strips is smaller than the distance between the two second strips.

3. The ultrafine grain structure rolling equipment for small-sized titanium alloy rods according to claim 2 is characterized in that: The clamping block is provided with a blocking surface and a clamping surface, and the two clamping blocks have two positions at one end of the U-shaped track: In the first position, the two obstruction surfaces are parallel to the end surface of the U-shaped track, and the two clamping surfaces are at an angle to the end surface of the U-shaped track. When the titanium alloy bar enters the U-shaped track, the two obstruction surfaces form an obstruction on the moving path of the titanium alloy bar. In the second position, the two obstructing surfaces hinder the movement of the titanium alloy rod, changing from being parallel to the end face of the U-shaped track to having an angle with the end face of the U-shaped track, and continue to hinder the movement of the titanium alloy rod, and the two clamping surfaces change from having an angle with the end face of the U-shaped track to being parallel to the end face of the U-shaped track, and clamp the end of the titanium alloy rod.

4. The ultrafine grain structure rolling equipment for small-sized titanium alloy rods according to claim 1 is characterized in that: The transmission member includes two transmission rods arranged crosswise with each other, the two rod bodies correspond to the two transmission rods one by one, one end of each transmission rod is hinged to the corresponding rod body, and the other end is hinged to a third block, the third block is slidably arranged in the first block, and the sliding direction is the same as the sliding direction of the second block on the first block, two fourth blocks are fixedly connected to the second block, each fourth block corresponds to a third block, when the two rod bodies approach each other, the third block does not generate a force on the fourth block, and when the two rod bodies move away from each other, the third block generates a force on the fourth block to retract the first block into the second block.

5. The ultrafine grain structure rolling equipment for small-sized titanium alloy rods according to claim 3 is characterized in that: The length of the U-shaped track is greater than the length of the titanium alloy bar being rolled.

6. The ultrafine grain rolling equipment for small-sized titanium alloy rods according to claim 3 is characterized in that: Each of the rods is rotatably arranged with respect to the corresponding slider, and the included angle of the rotation path of the rod on the slider is the same as the included angle of the obstruction surface when it changes from a vertical state to an inclined state.

7. A method for rolling a titanium alloy small-sized rod with ultrafine grain structure, which is based on the titanium alloy small-sized rod with ultrafine grain structure rolling equipment according to any one of claims 1 to 6, characterized in that: The method for rolling a titanium alloy small-size rod with ultrafine grain structure comprises the following steps: Titanium alloy bar rolling, the titanium alloy bar after rough rolling is sent to the finishing rolling unit for finishing rolling; The rolling size changes, the titanium alloy bar enters the U-shaped track from the previous rolling channel on the finishing mill, the traction mechanism clamps one end of the titanium alloy bar to pull the titanium alloy bar from one end of the U-shaped track to the other end, and then the titanium alloy bar enters the next rolling channel for smaller rolling operations, and so on, until the rolled size of the titanium alloy bar meets the requirements.

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