Pipe expanding machine for seamless steel pipe

Abstract

The utility model discloses a pipe expanding machine for seamless steel pipes, and belongs to the field of seamless steel pipe production. A mounting seat is assembled on the rack; a guide rod air cylinder is assembled on the upper end face of the mounting base, and the output end of the guide rod air cylinder is connected with a pipe expanding shaft. A clamping assembly is assembled on the upper end face of the mounting base and vertically arranged under the pipe expanding shaft. According to the pipe expanding machine for the seamless steel pipe, the seamless steel pipe can be positioned through opposite movement of the two clamping blocks and clamping and abutting of the outer portion of the seamless steel pipe, and compared with an air cylinder pushing mode in a reference file, the pipe expanding machine for the seamless steel pipe is simple in overall use, easy to operate and adjust and low in cost through the arranged clamping assemblies; and meanwhile, the rear end shaft and the positioning shaft are detachably installed in a threaded mode, so that the sizes of the two clamping blocks can be flexibly configured and installed according to the specific size requirement of the seamless steel pipe.

Description

Technical Field

[0001] The utility model belongs to the field of seamless steel pipe production, and specifically relates to a pipe expanding machine for seamless steel pipes. Background Art

[0002] Seamless steel pipe expansion is a process to expand the diameter of seamless steel pipe. Pipe expansion can be achieved through different methods, among which the common methods include cold expansion and hot expansion; seamless steel pipe expansion machine is a special equipment used for seamless steel pipe expansion. They usually consist of a frame, hydraulic system, clamps and control system to achieve the expansion of the diameter of the steel pipe.

[0003] According to a Chinese patent publication numbered CN216656079U, a pipe expander for seamless steel pipes is disclosed. The pipe expander structure in the application document includes a sleeve ring that is slidable on a bracket, the sleeve ring is fixedly connected to a cylinder through a connecting rod, the output end of the cylinder is fixedly connected to a fixing ring, two fixing rings are provided with semicircular grooves, a fixing seat is provided under the cylinder, the fixing seat is fixed on the bracket, and a spring is provided between the cylinder and the fixing seat;

[0004] In actual use, although the above cited patent realizes the clamping and positioning of the seamless steel pipe by clamping two sets of cylinders, its overall use cost is relatively high for the expansion of miniaturized seamless steel pipes. At the same time, the fixing ring used to clamp the seamless smooth pipe in this document is fixed at the end of the cylinder, and its adaptability to the clamping of seamless steel pipes with different requirements is poor. Therefore, in view of the above problems, a seamless steel pipe expansion machine is proposed. Utility Model Content

[0005] In response to one or more of the above defects or improvement needs of the prior art, the utility model provides a pipe expanding machine for seamless steel pipes, which has the advantages of lower overall practical cost, simple adjustment, and stronger adaptability to clamping seamless steel pipes.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a pipe expanding machine for seamless steel pipes, comprising a frame;

[0007] The frame is provided with a mounting seat; the upper end surface of the mounting seat is provided with a guide rod cylinder, and the output end of the guide rod cylinder is connected to a pipe expansion shaft;

[0008] The upper end surface of the mounting seat is equipped with a clamping assembly, and the clamping assembly is vertically arranged directly below the pipe expansion shaft;

[0009] The clamping assembly includes an adjustment seat arranged on the mounting seat, a screw seat is arranged on the adjustment seat, a slide groove is opened on the screw seat, a positive and negative screw rod is rotatably arranged in the slide groove, and a sliding block is provided for the positive and negative teeth of the positive and negative screw rod to mesh upward respectively, and a positioning seat is respectively installed on the outside of the two sliding blocks; a positioning shaft is arranged on the side of the positioning seat, and a clamping block is connected to the other side of the positioning shaft.

[0010] As a further improvement of the present invention, a bearing seat is respectively installed at both ends of the screw seat, and the two ends of the positive and negative thread screw are rotatably connected to one of the bearing seats respectively.

[0011] As a further improvement of the present invention, both ends of the positive and negative threaded rods pass through the bearing seats and are connected to rotating handles, and the outside of the rotating handles is engraved with anti-slip mesh patterns.

[0012] As a further improvement of the utility model, the outside of the screw seat is slidably provided with two side seats, and the two side seats are respectively arranged adjacent to one of the positioning seats, and the positioning seat is threadedly connected with a rear end shaft, and the ends of the two positioning shafts are provided with threaded holes, and one end of the rear end shaft extends to one side of the positioning shaft and is threadedly connected to the end of the positioning shaft.

[0013] As a further improvement of the utility model, a notch is provided on one side of the clamping block, the notch is provided in a triangular shape, and a rubber anti-slip pad is adhered to the inner wall of the clamping block.

[0014] As a further improvement of the present invention, two opposite sides of the two positioning seats are provided with reinforcing blocks detachably provided by bolts, and the side surfaces of the reinforcing blocks abut against the side surfaces of the clamping blocks.

[0015] In general, compared with the prior art, the above technical solutions conceived by the utility model have the following beneficial effects:

[0016] The utility model provides a seamless steel pipe expander, in actual use, through the mutual movement of multiple parts in the clamping assembly, the user turns the handle, through the rotation of the positive and negative screw rods, at this time restricted by the slide groove on the screw seat, so that the slider engaged with the outside of the positive and negative screw rods will drive the positioning seat to move in a straight line until the two clamping blocks move towards each other and clamp the outside of the seamless steel pipe tightly, so that the seamless steel pipe can be positioned. Compared with the cylinder pushing method in the cited document, the clamping assembly is simple to use as a whole, easy to operate and adjust, and has low cost. At the same time, the threaded detachable installation between the rear end shaft and the positioning shaft allows the sizes of the two clamping blocks to be flexibly configured and installed according to the specific size requirements of the seamless steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall installation structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the overall installation structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the overall installation structure of the clamping assembly of the utility model;

[0020] Figure 4 The utility model is a schematic diagram of the installation structure of the clamping block on the positioning shaft.

[0021] In all the drawings, the same figure marks represent the same technical features, specifically: 1. frame; 2. mounting seat; 3. guide rod cylinder; 4. expansion shaft; 5. clamping assembly; 51. adjustment seat; 52. screw seat; 53. bearing seat; 54. positive and negative thread screw; 55. slider; 56. turning handle; 57. positioning seat; 58. side seat; 59. rear end shaft; 510. positioning shaft; 511. cushion block; 512. clamping block; 513. reinforcement block. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example

[0024] Depend on Figure 1-4 Provided is a pipe expanding machine for seamless steel pipes, comprising a frame 1;

[0025] A mounting seat 2 is mounted on the frame 1; a guide rod cylinder 3 is mounted on the upper end surface of the mounting seat 2, and a pipe expansion shaft 4 is connected to the output end of the guide rod cylinder 3;

[0026] The upper end surface of the mounting seat 2 is equipped with a clamping assembly 5, which is vertically arranged just below the pipe expansion shaft 4;

[0027] The clamping assembly 5 includes an adjusting seat 51 arranged on the mounting seat 2, a screw seat 52 is arranged on the adjusting seat 51, a slide groove is opened on the screw seat 52, a positive and negative screw rod 54 is rotatably arranged in the slide groove, and a slider 55 is provided for the positive and negative teeth of the positive and negative screw rod 54 to mesh upward respectively, and a positioning seat 57 is respectively installed on the outside of the two sliders 55; a positioning shaft 510 is arranged on the side of the positioning seat 57, and the other side of the positioning shaft 510 is connected to the clamping block 512.

[0028] In this embodiment, in actual use, through the mutual movement of multiple components within the clamping assembly 5, the user turns the handle 56, and through the rotation of the forward and reverse screw rods 54, which are restricted by the slide groove on the screw seat 52, the slider 55 engaged with the outside of the forward and reverse screw rods 54 will drive the positioning seat 57 to move in a straight line until the two clamping blocks 512 move in opposite directions and clamp the outside of the seamless steel pipe tightly, thereby achieving the positioning of the seamless steel pipe. Compared with the cylinder pushing method in the cited document, the clamping assembly 5 is simple to use as a whole, easy to operate and adjust, and has low cost. At the same time, the threaded detachable installation between the rear end shaft 59 and the positioning shaft 510 allows the size of the two clamping blocks 512 to be flexibly configured and installed according to the specific size requirements of the seamless steel pipe.

[0029] Specifically, refer to Figure 3-4 A bearing seat 53 is respectively mounted at both ends of the screw seat 52, and both ends of the positive and negative threaded screw rod 54 are rotatably connected to one of the bearing seats 53.

[0030] In this embodiment, by the rotational cooperation between the bearing seat 53 and the positive and negative screw rod 54, the positive and negative screw rod 54 can be smoother when rotating, and the rotational cooperation of the bearing part on the positive and negative screw rod 54 can provide support and positioning, thereby ensuring the axial position of the positive and negative screw rod 54 is stable, preventing deviation and shaking, and ensuring the accuracy and stability of the transmission.

[0031] Specifically, refer to Figure 3-4 Both ends of the positive and negative threaded rods 54 pass through the bearing seat 53 and are connected to a rotating handle 56 , and the outside of the rotating handle 56 is engraved with anti-slip mesh patterns.

[0032] In this embodiment, a rotating handle 56 arranged at the end of the forward and reverse screw rods 54 can provide good holding and gripping force; when the operator holds the rotating handle 56, the forward and reverse screw rods 54 can be grasped more firmly, making manual rotation more stable and easy, and the anti-slip mesh can further improve the rotation stability.

[0033] Specifically, refer to Figure 3-4 Two side seats 58 are slidingly provided on the outside of the screw seat 52. The two side seats 58 are respectively arranged adjacent to one of the positioning seats 57. The positioning seat 57 is threadedly connected with a rear end shaft 59. The ends of the two positioning shafts 510 are both provided with threaded holes. One end of the rear end shaft 59 extends to one side of the positioning shaft 510 and is threadedly connected to the end of the positioning shaft 510.

[0034] In this embodiment, in the actual clamping operation, due to the different diameters of different seamless steel pipes, taking into account the clamping and positioning requirements of different seamless steel pipes, the threaded detachable installation between the rear end shaft 59 and the positioning shaft 510 allows the sizes of the two clamping blocks 512 to be flexibly configured and installed according to the size requirements of the specific seamless steel pipe. The sizes of the positioning shaft 510 and the clamping blocks 512 can be reserved according to non-standard customization. At the same time, the rear end shaft 59 can further improve the stability of the positioning shaft 510 on the positioning seat 57, and the cushion block 511 can be adaptively reduced or increased according to the different lengths of the positioning shaft 510, thereby achieving a stable connection between the rear end shaft 59 and the positioning shafts 510 of different lengths and sizes.

[0035] Specifically, refer to Figure 3-4 A notch is provided on one side of the clamping block 512 , and the notch is provided in a triangular shape. A rubber anti-slip pad is adhered to the inner wall of the clamping block 512 .

[0036] In this embodiment, the notch opened on the clamping block 512 can be used to position the seamless steel pipe, and the rubber anti-skid pad on the inner wall of the clamping block 512 can stably clamp and position the seamless steel pipe. At the same time, the rubber anti-skid pad can prevent the outer wall of the seamless steel pipe from being clamped and damaged early.

[0037] Specifically, refer to Figure 3-4 The two positioning seats 57 have reinforcing blocks 513 detachably mounted on opposite sides thereof via bolts, and the side surfaces of the reinforcing blocks 513 abut against the side surfaces of the clamping blocks 512 .

[0038] In this embodiment, the tight fit between the reinforcing block 513 and the clamping block 512 can avoid loosening when clamping the seamless steel pipe. The reinforcing block 513 can be used as a side limit to provide the clamping block 512 with a more stable clamping requirement.

[0039] The utility model of seamless steel pipe expanding machine:

[0040] Step 1: When the user is expanding the seamless steel pipe, the operator places the seamless steel pipe to be processed between the two clamping blocks 512, and then the user rotates the rotating handle 56, and the connection between the rotating handle 56 and the positive and negative screw rods 54 is used to make the positive and negative screw rods 54 rotate accordingly. At this time, the slider 55 engaged with the outside of the positive and negative screw rods 54 is restricted by the slide groove on the screw seat 52, so that the positioning seat 57 is driven to move linearly. Through the connection between the positioning shaft 510 and the rear end shaft 59, the two sets of positioning seats 57 and side seats 58 are separated or clamped linearly. At this time, the user controls the two clamping blocks 512 to move in opposite directions until the outside of the seamless steel pipe is clamped tightly, so as to realize the positioning of the seamless steel pipe.

[0041] Step 2: After the seamless steel pipe is clamped by the two clamping blocks 512, the user can provide an external air source to the guide rod cylinder 3 and give the guide rod cylinder 3 an output air pressure value, so that the expansion shaft 4 connected to the output end of the expansion shaft 4 can be driven by the guide rod cylinder 3 to move radially downward until the end of the expansion shaft 4 contacts the end of the seamless steel pipe, thereby finally realizing the expansion operation of the seamless steel pipe.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A seamless steel pipe expanding machine, characterized in that: comprising a frame (1); The frame (1) is provided with a mounting seat (2); the upper end surface of the mounting seat (2) is provided with a guide rod cylinder (3), and the output end of the guide rod cylinder (3) is connected to a pipe expansion shaft (4); The upper end surface of the mounting seat (2) is equipped with a clamping assembly (5), and the clamping assembly (5) is vertically arranged directly below the pipe expansion shaft (4); The clamping assembly (5) comprises an adjustment seat (51) arranged on the mounting seat (2), a screw seat (52) being arranged on the adjustment seat (51), a slide groove being provided on the screw seat (52), a positive and negative threaded rod (54) being rotatably arranged in the slide groove, a slider (55) being provided for the positive and negative threads of the positive and negative threaded rod (54) to mesh upwards, respectively, and a positioning seat (57) being respectively installed on the outside of the two sliders (55); a positioning shaft (510) being provided on the side of the positioning seat (57), and a clamping block (512) being connected to the other side of the positioning shaft (510).

2. The seamless steel pipe expanding machine according to claim 1, characterized in that: A bearing seat (53) is respectively mounted on both ends of the screw seat (52), and both ends of the positive and negative threaded screw rod (54) are rotatably connected to one of the bearing seats (53).

3. The seamless steel pipe expanding machine according to claim 1, characterized in that: The outer ends of both ends of the positive and negative threaded rod (54) penetrate the bearing seat (53) and are connected to a rotating handle (56), and the outer surface of the rotating handle (56) is engraved with anti-slip mesh patterns.

4. The seamless steel pipe expanding machine according to claim 1, characterized in that: The screw seat (52) is externally slidably provided with two side seats (58), and the two side seats (58) are respectively arranged adjacent to one of the positioning seats (57), and a rear end shaft (59) is threadedly connected to the positioning seat (57), and threaded holes are provided at the ends of the two positioning shafts (510), and one end of the rear end shaft (59) extends to one side of the positioning shaft (510) and is threadedly connected to the end of the positioning shaft (510).

5. The seamless steel pipe expanding machine according to claim 1, characterized in that: A notch is provided on one side of the clamping block (512), the notch being provided in a triangular shape, and a rubber anti-slip pad is adhered to the inner wall of the clamping block (512).

6. The seamless steel pipe expanding machine according to claim 1, characterized in that: The two positioning seats (57) are provided with reinforcing blocks (513) on opposite sides thereof which are detachably connected by bolts, and the side surfaces of the reinforcing blocks (513) abut against the side surfaces of the clamping blocks (512).

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