Core rod conveying and pushing mechanism for seamless tube machining

Abstract

The utility model discloses a core rod conveying and pushing mechanism for seamless tube processing, which comprises a core rod pressing mechanism, a core rod conveying mechanism and a core rod pushing mechanism, the core rod pressing mechanism and the core rod conveying mechanism are crosswise arranged from top to bottom, the core rod pushing mechanism is positioned on the rear side of the core rod conveying mechanism, and the core rod pushing mechanism is positioned on the rear side of the core rod conveying mechanism. The core rod pressing mechanism comprises a pressing oil cylinder, a pressing rack and a fixed rack, the core rod conveying mechanism comprises a conveying motor, a conveying speed reducer, a universal coupling, a gear shaft, a driving gear, a driven gear, a driving conveying roller and a driven conveying roller, and the core rod pushing mechanism comprises a lifting oil cylinder, a pushing oil cylinder and an oil cylinder support. The mandrel can be automatically clamped, pushed and separated, rapid feeding and discharging of pierced billets are facilitated, the rolling rhythm is compact, the rolling period is shortened, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of spinning and rolling forming, and specifically relates to a mandrel conveying and propulsion mechanism for seamless tube processing. Background Technology

[0002] In seamless tube processing, the mandrel acts as a support structure for the inner wall of the rough tube and plays a role throughout the entire deformation process. During production, the rough tube needs to be repeatedly loaded and unloaded for continuous processing. To achieve rapid loading and unloading, a mandrel with a limited movement is used to advance at a constant speed, thus centering and fixing the inner diameter. After processing, a tube-removing machine separates the rough tube from the mandrel. This process suffers from a long processing time. Utility Model Content

[0003] The purpose of this invention is to provide a mandrel conveying and propulsion mechanism for seamless tube processing, so as to solve the problems existing in the prior art.

[0004] This utility model is achieved through the following technical solution: a mandrel conveying and pushing mechanism for seamless tube processing, including a mandrel clamping mechanism, a mandrel conveying mechanism, a mandrel pushing mechanism, and a mandrel tail frame for storing mandrels; the mandrel clamping mechanism and the mandrel conveying mechanism are arranged crosswise from top to bottom, and the mandrel conveying mechanism, the mandrel pushing mechanism, and the mandrel tail frame are arranged sequentially.

[0005] The mandrel clamping mechanism includes a pressing cylinder, a pressing frame, and a fixed frame. The pressing cylinder body is fixedly mounted on the top of the pressing frame, and the axis of the pressing cylinder is the normal to the upper surface of the fixed frame. The piston rod of the pressing cylinder is connected to the upper surface of the pressing frame by a nut. The upper surface of the pressing frame has a straight hole with the same diameter as the piston rod of the cylinder. The pressing frame slides within the fixed frame under the driving action of the pressing cylinder. The fixed frame is installed on the foundation.

[0006] The mandrel conveying mechanism includes a conveying motor, a conveying reducer, a universal coupling, a gear shaft, a driving gear, a driven gear, a driving conveying roller, and a driven conveying roller. The output shaft of the conveying motor is connected to the input shaft of the conveying reducer. The output shaft of the conveying reducer is connected to one end of the gear shaft via the universal coupling. The driving gear is mounted on the extended shaft at the other end of the gear shaft via a key. The extended shaft of the gear shaft is outside the pressing frame. The driving gear and the driven gear mesh and engage in transmission. The driven gear is mounted on the extended shaft of the driving conveying roller via a key. The extended shaft of the driving conveying roller is outside the pressing frame. The gear shaft and the driving conveying roller are mounted in the pressing frame in a top-to-bottom order via bearings. The driven conveying roller is mounted in a fixed frame via bearings. The rotation axis of the driven conveying roller is lower than the machining center line. The axes of the driving and driven conveying rollers are in the same vertical plane, and the machining center line is the normal to the vertical plane.

[0007] The active and passive conveying rollers have a "V" shaped structure, and the distance from the surface of the conveying roller to the processing center line is the outer radius of the rough tube.

[0008] The driven gear, driving conveyor roller, and passive conveyor roller are arranged in two sets, parallel to each other. The driving gear meshes with two driven gears at the same time, and the two driven gears rotate in the same direction.

[0009] The pressing frame and the fixed frame are box beam structures. The former has three through holes and the latter has two through holes, which are used to install the gear shaft, the active conveyor roller shaft and the passive conveyor roller shaft, respectively.

[0010] The mandrel propulsion mechanism includes a lifting cylinder, a propulsion cylinder, and a cylinder support. The lifting cylinder body is installed on the foundation, and the cylinder piston rod is connected to the cylinder support. The center line of the piston rod is perpendicular to the machining center line, and the piston rod runs perpendicular to the ground and upwards. A slider is provided on one side of the cylinder support and installed on the fixed frame to ensure that the cylinder support moves perpendicular to the machining center line when the lifting cylinder is running. The other end of the cylinder support is equipped with a propulsion cylinder, which is installed on the side of the cylinder support. The center line of the propulsion cylinder coincides with the machining center line, and the piston rod runs in the direction of mandrel delivery.

[0011] The mandrel tailstock is a hollow sleeve with its centerline coinciding with the machining centerline. The inner diameter of the sleeve is larger than the outer diameter of the limiting section, and the length of the sleeve is greater than the length of the rough tube.

[0012] Compared with the prior art, the beneficial effects of this utility model are: by setting a mandrel clamping mechanism, a mandrel conveying mechanism and a mandrel pushing mechanism, the mandrel can be automatically clamped, pushed and released, which facilitates the rapid loading and unloading of raw tubes, makes the rolling rhythm compact, shortens the rolling cycle, improves production efficiency, and has broad application prospects. Attached Figure Description

[0013] Figure 1 This is a top view schematic diagram of a mandrel conveying and propulsion mechanism for seamless tube processing according to this utility model.

[0014] Figure 2 This is a front view schematic diagram of a mandrel conveying and propulsion mechanism for seamless tube processing according to this utility model.

[0015] Figure 3 yes Figure 2 A schematic diagram of the AA transverse cross-sectional structure;

[0016] Figure 4 yes Figure 2 A partial structural diagram of the longitudinal section of BB.

[0017] In the diagram: 1-Pressing cylinder, 2-Pressing frame, 3-Driving gear, 4-Driven gear, 5-Pushing cylinder, 6-Cylinder bracket, 7-Lifting cylinder, 8-Fixed frame, 9-Passive conveyor roller, 10-Driving conveyor roller, 11-Gear shaft, 12-Machining center line, 13-Transmission motor, 14-Transmission reducer, 15-Universal coupling, 16-Hollow sleeve. Detailed Implementation

[0018] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings.

[0019] See Figures 1-4 A mandrel conveying and pushing mechanism for seamless tube processing includes a mandrel clamping mechanism, a mandrel conveying mechanism, a mandrel pushing mechanism, and a mandrel tailstock for storing mandrels; the mandrel clamping mechanism and the mandrel conveying mechanism are arranged crosswise from top to bottom, and the mandrel conveying mechanism, the mandrel pushing mechanism, and the mandrel tailstock are arranged sequentially.

[0020] The mandrel clamping mechanism includes a pressing cylinder 1, a pressing frame 2, and a fixed frame 8. The cylinder of the pressing cylinder 1 is fixedly mounted on the top of the pressing frame 2. The axis of the pressing cylinder 1 is normal to the upper surface of the fixed frame 8. The piston rod of the pressing cylinder 1 is connected to the upper surface of the pressing frame 2 by a nut. The upper surface of the pressing frame 2 has a straight hole with the same diameter as the piston rod of the cylinder. Under the driving action of the pressing cylinder 1, the pressing frame 2 slides within the fixed frame 8 to realize the active conveying roller 10 pressing the rough tube. The fixed frame 8 is installed on the foundation.

[0021] The mandrel conveying mechanism includes a conveying motor 13, a conveying reducer 14, a universal coupling 15, a gear shaft 11, a driving gear 3, a driven gear 4, a driving conveying roller 10, and a driven conveying roller 9. The output shaft of the conveying motor 13 is connected to the input shaft of the conveying reducer 14, and the output shaft of the conveying reducer 14 is connected to one end of the gear shaft 11 via the universal coupling 15. The driving gear 3 is mounted on the extended shaft at the other end of the gear shaft 11 via a key. The extended shaft of the gear shaft 11 is outside the pressing frame 2, and the driving gear 3 meshes with the driven gear 4. The contact drive is used for deceleration transmission. The driven gear 4 is mounted on the extended shaft of the active conveyor roller 10 via a key. The extended shaft of the active conveyor roller 10 is outside the pressing frame 2. The gear shaft 11 and the active conveyor roller 10 are mounted in the pressing frame 2 in a top-to-bottom order via bearings. The passive conveyor roller 9 is mounted in the fixed frame 8 via bearings. The rotation axis of the passive conveyor roller 9 is lower than the machining center line 12. The axes of the active conveyor roller 10 and the passive conveyor roller 9 are in the same vertical plane, and the machining center line 12 is the normal to the vertical plane.

[0022] The active conveyor roller 10 and the passive conveyor roller 9 have a "V" shaped structure, and the distance from the surface of the conveyor roller to the processing center line 12 is the outer radius of the rough tube.

[0023] Two sets of driven gear 4, driving conveyor roller 10, and passive conveyor roller 9 are arranged in parallel front and rear. The driving gear 3 simultaneously meshes with two driven gears 4, and the two driven gears 4 rotate in the same direction.

[0024] The pressing frame 2 and the fixed frame 8 are box beam structures. The former has 3 through holes and the latter has 2 through holes, which are used to install the gear shaft 11, the active conveyor roller shaft 10 and the passive conveyor roller shaft 9, respectively.

[0025] The mandrel propulsion mechanism includes a lifting cylinder 7, a propulsion cylinder 5, and a cylinder support 6. The cylinder body of the lifting cylinder 7 is installed on the foundation. The piston rod of the lifting cylinder is connected to the cylinder support 6, and its center line is spatially perpendicular to the machining center line 12. The piston rod runs vertically upwards. A slider is installed on one side of the cylinder support 6 and mounted on the fixed frame 8. When the lifting cylinder 7 is running, it ensures that the cylinder support 6 moves perpendicular to the machining center line. The propulsion cylinder 5 is installed on the other side of the cylinder support 6. The center line of the propulsion cylinder 5 coincides with the machining center line 12, and the piston rod runs in the direction of mandrel delivery.

[0026] The mandrel tailstock includes a hollow sleeve 16, the center line of which coincides with the machining center line 12, the inner diameter of which is larger than the outer diameter of the limiting section, and the length of which is larger than the length of the rough tube.

[0027] Before processing, the mandrel conveying mechanism first reverses to retract the mandrel to its limit position. The rough tube is then loaded, and the mandrel conveying mechanism inserts the mandrel through a hole into the rough tube. The mandrel's swirl section makes gap contact with the inner surface of the rough tube, positioned close to the swirl mechanism. At this time, the lifting cylinder 5 and cylinder support 6 are in their low positions. The lifting cylinder operates, driving the cylinder support 6 upwards until the center line of the pushing cylinder 5 coincides with the processing center line 12. The pushing cylinder 5 then presses the end of the mandrel's limiting section to its limit position, contacting the fixed support 8. Then, the swirl mechanism, cooling system, and tube pulling mechanism are sequentially activated to move the rough tube away from the swirl mechanism and process it.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A mandrel transfer and push mechanism for seamless tube processing, characterized by: The mandrel pressing mechanism, the mandrel conveying mechanism and the mandrel pushing mechanism are included; the mandrel pressing mechanism and the mandrel conveying mechanism are arranged in a cross manner from top to bottom, and the mandrel pushing mechanism is located at the rear side of the mandrel conveying mechanism.

2. A mandrel transfer and push mechanism for seamless tube processing as defined in claim 1, wherein: The mandrel pressing mechanism includes a pressing oil cylinder (1), a pressing rack (2) and a fixed rack (8); the cylinder body of the pressing oil cylinder (1) is fixedly installed on the top of the pressing rack (2), the axis of the pressing oil cylinder (1) is the normal line of the upper surface of the fixed rack (8), the piston rod of the pressing oil cylinder (1) is connected to the upper surface of the pressing rack (2) through a nut, the upper surface of the pressing rack (2) has a straight hole with the same diameter as the piston rod of the oil cylinder, the pressing rack (2) slides in the fixed rack (8) under the driving action of the pressing oil cylinder (1), and the fixed rack (8) is installed on the foundation.

3. A mandrel transfer and advancement mechanism for seamless tube processing as defined in claim 2 wherein: The mandrel conveying mechanism includes a conveying motor (13), a conveying reducer (14), a universal coupling (15), a gear shaft (11), a driving gear (3), a driven gear (4), a driving conveying roller (10) and a driven conveying roller (9); the output shaft of the conveying motor (13) is connected to the input shaft of the conveying reducer (14), the output shaft of the conveying reducer (14) is connected to one end of the gear shaft (11) through the universal coupling (15), the driving gear (3) is installed on the outer shaft of the other end of the gear shaft (11) through a key, the outer shaft of the gear shaft (11) is outside the pressing rack (2), the driving gear (3) is in meshing contact with the driven gear (4) to drive, the driven gear (4) is installed on the outer shaft of the driving conveying roller (10) through a key, the outer shaft of the driving conveying roller (10) is outside the pressing rack (2), the gear shaft (11) and the driving conveying roller (10) are installed in the pressing rack (2) in the order from top to bottom through bearings, the driven conveying roller (9) is installed in the fixed rack (8) through a bearing, the rotary axis of the driven conveying roller (9) is lower than the machining center line (12), the axes of the driving conveying roller (10) and the driven conveying roller (9) are in the same vertical plane, and the machining center line (12) is the normal line of the vertical plane.

4. A mandrel transfer and advancement mechanism for seamless tube processing as defined in claim 3 wherein: The driving conveying roller (10) and the driven conveying roller (9) are in a "V" type structure, and the distance from the surface of the conveying roller to the machining center line (12) is the outer radius of the blank pipe.

5. A mandrel transfer and advancement mechanism for seamless tube processing as defined in claim 3 wherein: The driven gear (4), the driving conveying roller (10) and the driven conveying roller (9) are provided with two groups and arranged in parallel, the driving gear (3) meshes with two driven gears (4) at the same time, and the two driven gears (4) rotate in the same direction.

6. A mandrel transfer and advancement mechanism for seamless tube processing as defined in claim 5 wherein: The pressing rack (2) and the fixed rack (8) are in a box beam structure, the former has three through holes, and the latter has two through holes, which are respectively used for installing the gear shaft (11), the shaft of the driving conveying roller (10) and the shaft of the driven conveying roller (9).

7. A mandrel transfer and advancement mechanism for seamless pipe production as defined in claim 2 wherein: The mandrel pushing mechanism comprises a lifting oil cylinder (7), a pushing oil cylinder (5) and an oil cylinder support (6), the cylinder body of the lifting oil cylinder (7) is installed on the foundation, the oil cylinder piston rod is connected with the oil cylinder support (6), the center line of the piston rod is perpendicular to the machining center line in space, the running direction of the piston rod is vertically upward, one end of the oil cylinder support (6) is provided with a sliding block on the side surface and is installed on the fixed rack (8), the oil cylinder support (6) is guaranteed to move vertically to the machining center line during the operation of the lifting oil cylinder (7), the other end of the oil cylinder support (6) is installed with the pushing oil cylinder (5), the pushing oil cylinder (5) is installed on the side surface of the oil cylinder support (6), the center line of the piston rod is coincident with the machining center line, and the running direction of the piston rod points to the mandrel conveying direction.

8. A mandrel transfer and advancement mechanism for seamless pipe production as defined in claim 1 wherein: Further comprising a mandrel tailstock for storing the mandrel, the mandrel tailstock is a hollow sleeve (16), the center line of the sleeve is coincident with the machining center line, and the inner diameter of the sleeve is larger than the outer diameter of the limiting section.

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