Multi-specification blank feeding device and process for core rod heat treatment

Abstract

The invention discloses a multi-specification blank feeding device and process for core rod heat treatment, and relates to the technical field of bar feeding, the multi-specification blank feeding device comprises a guide rail, a sliding plate is arranged on the guide rail in a sliding mode, two rotating discs are symmetrically distributed on the sliding plate, a plurality of clamping strips distributed in a radial mode are fixed in each rotating disc, and a sliding block is arranged in each clamping strip in a sliding mode; two attaching strips distributed in a V shape are arranged in each sliding block, and the two rotating discs are connected together through a rotating shaft; by means of the design of the clamping strips distributed on the rotary disc in the radial shape and the sliding blocks capable of sliding, core rod blanks with different diameters can be clamped into different radial positions of the clamping strips, and the applicability is remarkably improved; the sliding block movement, the fitting strip angle adjustment and the clamping action can be synchronously completed only by rotating the knob, and the operation complexity is reduced; the telescopic teeth on the attaching strips are self-adaptive to the surface radian of the core rod through spring pre-tightening force, the size error is further eliminated, and loosening or falling in the transportation process is avoided.

Description

Technical Field

[0001] This invention relates to the field of bar feeding technology, specifically a multi-specification billet feeding device and process for mandrel heat treatment. Background Technology

[0002] Mandrels are critical tools in industries such as tube rolling and forging, and their performance directly affects the dimensional accuracy and surface quality of products. Heat treatment (such as quenching and tempering) is the core process for improving the hardness, wear resistance, and fatigue resistance of mandrels. However, traditional feeding methods suffer from problems such as poor specification adaptability, unstable positioning, and uneven heat treatment, resulting in low production efficiency, high scrap rates, and even affecting mandrel life.

[0003] Currently, mandrel feeding for heat treatment mainly relies on the following methods: Single chain / roller conveyor: Mandrels are conveyed individually via chain or roller conveyor, and manually or robotically clamped one by one. This method suffers from low efficiency and cannot handle batch processing, becoming a bottleneck, especially in large-scale production. Fixed multi-station fixture: Multiple mandrels are simultaneously clamped and fed into the heat treatment furnace using fixed chucks or V-block arrays. This method is only suitable for mandrels within a specific diameter range, is difficult to adjust, and rigid clamping can easily cause indentations on the mandrel surface, affecting subsequent processing quality. When mandrels are densely arranged, the central area receives insufficient heating, affecting the consistency of heat treatment. Cantilever support structure: One end of the mandrel is fixed, while the other end is suspended before entering the heat treatment furnace. At high temperatures, the mandrel sags due to its own weight, leading to dimensional deviations. During transport, the cantilever end is prone to swaying, causing impact damage.

[0004] Therefore, it is necessary to provide a multi-specification billet feeding device and process for mandrel heat treatment to solve the problems mentioned in the background art. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-specification billet feeding device for mandrel heat treatment, comprising a guide rail, a slide plate slidably disposed on the guide rail, two turntables symmetrically distributed on the slide plate, multiple radially distributed locking strips fixed in each turntable, a slider slidably disposed in each locking strip, and two "V"-shaped bonding strips disposed in each slider, the two turntables being connected together by a rotating shaft.

[0006] Furthermore, each of the sliders is hinged to a connecting rod, and each connecting rod is hinged to a linkage block.

[0007] Furthermore, each of the linkage blocks is threaded with a lead screw, which is rotatably connected to the corresponding turntable, and a knob is fixed at one end of the lead screw.

[0008] Furthermore, a connecting shaft is fixed on the slider, and the two bonding strips are rotatably disposed in the connecting shaft. A driven bevel gear is fixed on each of the opposite sides of the two bonding strips, and a driving bevel gear is rotatably disposed on the slider. The driving bevel gear meshes with the two driven bevel gears.

[0009] Furthermore, a worm gear is fixed to one end of the drive bevel gear, and a worm gear meshing with the worm gear is rotatably mounted on the slider, and the worm gear is fixed to the hinge shaft of the connecting rod.

[0010] Furthermore, each of the bonding strips has multiple linearly arranged telescopic teeth slidably disposed on the side of the mandrel blank that is in contact with the bonding strip, and a spring is disposed between each telescopic tooth and the bonding strip.

[0011] Furthermore, a rotating plate is rotatably mounted on the skateboard, and two turntables are mounted on the rotating plate.

[0012] Furthermore, each of the adjacent sides of the skateboard is slidably provided with a support plate, and the two turntables are respectively rotatably mounted on the two support plates.

[0013] Furthermore, the rotating shaft is a telescopic shaft that is retractable and restricts rotation.

[0014] A multi-specification billet feeding process for mandrel heat treatment includes: S1. Slide the support plate to the target distance and lock it in place. The rotating shaft is telescopic and automatically adjusts with the distance. The rotating plate rotates to the lateral position in the direction of travel of the guide rail. S2. Place the mandrel horizontally between the two topmost locking strips of the two turntables. The mandrel will automatically lock into the corresponding position of the locking strip according to its diameter. S3. After placing two mandrels, rotate the knob corresponding to the retaining strip between the mandrels. The screw pushes the linkage block to move. The linkage block drives the slider to slide along the retaining strip through the connecting rod, so that the bonding strip contacts the surface of the mandrel. S4. When the slider moves, the connecting rod rotates the worm gear to drive the worm wheel, which in turn drives the bevel gear, causing the two driven bevel gears to rotate in opposite directions. This automatically adjusts the included angle of the bonding strip, and the telescopic teeth fully fit the mandrel arc surface through telescopic movement. S5. After placing each mandrel, rotate the knob corresponding to the retaining strip of the previous mandrel until all mandrels are placed. Then, rotate the turntable to change the mandrel from a horizontal position to a vertical position consistent with the direction of travel of the guide rail, and send it into the heat treatment furnace.

[0015] Compared with the prior art, the beneficial effects of the present invention are: In this invention, the mandrels are evenly distributed along the circumference of the turntable. When entering the heat treatment furnace, the relative positions of each mandrel and the heat source are consistent, avoiding the uneven heating problem caused by traditional feeding arrangements. If the mandrels need to be rotated during the heat treatment process, the turntable can rotate as a whole, allowing the heating surface of the mandrels to be dynamically adjusted, further improving the heat treatment quality. This is especially suitable for induction heating or radiation heating processes. Compared with traditional single-point clamping or cantilever support, this device provides a more uniform distribution of support force for the mandrels. All mandrels are constrained by both clamping strips and bonding strips, ensuring that even mandrels in the lower half of the turntable can maintain a stable posture and avoid displacement or collision during transport.

[0016] The radially distributed locking strips and sliding slider design on the turntable in this invention allow mandrel blanks of different diameters to be clamped into different radial positions of the locking strips, significantly improving applicability. The slider is driven to move by a lead screw connecting rod, which synchronously links the worm gear and bevel gear system, so that the included angle of the bonding strip is automatically adjusted with the position of the slider, ensuring stable clamping of mandrels of different diameters. The slider movement, bonding strip angle adjustment and clamping action can be completed simultaneously by simply rotating the knob, reducing the complexity of operation. The telescopic teeth on the bonding strip adapt to the curvature of the mandrel surface through spring preload, further eliminating dimensional errors and preventing loosening or falling off during transportation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a multi-specification billet feeding device for mandrel heat treatment. Figure 2 This is a three-dimensional structural diagram of the turntable in this invention; Figure 3 This is a schematic diagram of the planar structure of the turntable in this invention; Figure 4 This is a three-dimensional structural diagram of the slider in this invention; Figure 5 This is a schematic diagram of the planar structure of the slider in this invention; In the diagram: 1. Guide rail; 2. Slide plate; 3. Rotating plate; 4. Support plate; 5. Turntable; 6. Locking bar; 61. Slider; 62. Connecting rod; 63. Linkage block; 64. Lead screw; 65. Knob; 66. Connecting shaft; 67. Driven bevel gear; 68. Drive bevel gear; 69. Worm gear; 610. Worm; 7. Fitting strip; 71. Telescopic gear; 8. Rotating shaft. Detailed Implementation

[0018] Please see Figures 1-5In this embodiment of the invention, a multi-specification billet feeding device for mandrel heat treatment includes a guide rail 1, a slide plate 2 slidably disposed on the guide rail 1, two turntables 5 symmetrically distributed on the slide plate 2, multiple radially distributed locking strips 6 fixed in each turntable 5, a slider 61 slidably disposed in each locking strip 6, and two "V"-shaped bonding strips 7 disposed in each slider 61. The two turntables 5 are connected together by a rotating shaft 8.

[0019] The mandrel blank can be held between the two clamping strips 6 of the two turntables 5. Since the clamping strips 6 are radially distributed, mandrel blanks of different diameters can be held at different positions on the clamping strips 6, thereby improving applicability. Furthermore, by sliding the slider 61, the two "V"-shaped bonding strips 7 can be bonded to the mandrel blanks on both sides, thereby ensuring that the mandrel blanks will not fall off. After placing the mandrel blanks between each pair of clamping strips 6, the mandrel blanks can be sent into the boiler for heat treatment by sliding the slide plate 2.

[0020] In this embodiment, each slider 61 is hinged to a connecting rod 62, and each connecting rod 62 is hinged to a linkage block 63.

[0021] In this embodiment, each linkage block 63 is threadedly connected to a lead screw 64, which is rotatably connected to the corresponding turntable 5, and a knob 65 is fixed to one end of the lead screw 64.

[0022] In other words, by rotating the knob 65, the lead screw 64 can drive the corresponding linkage block 63 to slide, thereby causing the connecting rod 62 to push the slider 61 to slide to different positions, ensuring that the bonding strip 7 can be bonded to the mandrel blank. After the position of the linkage block 63 is determined, the connecting rod 62 can support the clamping strip 6, improving stability.

[0023] In this embodiment, a connecting shaft 66 is fixed on the slider 61, and two bonding strips 7 are rotatably disposed in the connecting shaft 66. A driven bevel gear 67 is fixed on each of the opposite sides of the two bonding strips 7. A driving bevel gear 68 is rotatably disposed on the slider 61, and the driving bevel gear 68 meshes with the two driven bevel gears 67.

[0024] In other words, by rotating the drive bevel gear 68, the two driven bevel gears 67 can be driven to rotate synchronously in opposite directions, thereby enabling the two bonding strips 7 on the slider 61 to also rotate in opposite directions, so as to adjust the tilt angle of the bonding strips 7 and ensure that the bonding strips 7 can be bonded to mandrel blanks of different diameters.

[0025] In this embodiment, a worm gear 69 is fixed to one end of the drive bevel gear 68, and a worm 610 that meshes with the worm gear 69 is rotatably mounted on the slider 61, and the worm 610 is fixed to the hinge shaft of the connecting rod 62.

[0026] In other words, when the connecting rod 62 pushes the slider 61 to slide, the connecting rod 62 will rotate relative to the slider 61, thereby causing the worm gear 610 to drive the worm wheel 69 to rotate, and causing the drive bevel gear 68 to drive the two driven bevel gears 67 to rotate synchronously in opposite directions, so as to synchronously adjust the tilt angle of the two bonding strips 7.

[0027] Furthermore, the closer the slider 61 is to the center of the turntable 5, the larger the included angle between the two bonding strips 7, thus ensuring that it can be bonded to the mandrel blank with a smaller diameter; conversely, the farther the slider 61 is from the center of the turntable 5, the smaller the included angle between the two bonding strips 7, ensuring that the mandrel blank with a larger diameter can pass between the bonding strips 7 on both sides.

[0028] In this embodiment, each of the bonding strips 7 has a plurality of linearly arranged telescopic teeth 71 slidably disposed on the side of the mandrel blank, and a spring is disposed between each telescopic tooth 71 and the bonding strip 7.

[0029] When the bonding strip 7 is bonded to the surface of the mandrel blank, the telescopic teeth 71 can be extended and retracted to fit the arc surface of the mandrel blank, thereby improving stability.

[0030] In this embodiment, a rotating plate 3 is rotatably mounted on the skateboard 2, and two turntables 5 are mounted on the rotating plate 3.

[0031] The direction of feeding can be changed by rotating the rotating plate 3. Since the mandrel blank is transported laterally, the mandrel blank is placed laterally in the direction of travel of the guide rail 1, and then rotated between the clamping bars 6 to be placed longitudinally in the direction of travel of the guide rail 1, so as to facilitate its entry into the boiler.

[0032] In this embodiment, a support plate 4 is slidably arranged on each of the adjacent sides of the slide plate 2, and the two turntables 5 are respectively rotatably arranged on the two support plates 4.

[0033] The distance between the two turntables 5 can be changed by sliding the support plate 4, thereby accommodating mandrel blanks of different lengths.

[0034] In this embodiment, the rotating shaft 8 is a telescopic shaft that is retractable and restricts rotation, thereby accommodating the sliding of the support plate 4.

[0035] A multi-specification billet feeding process for mandrel heat treatment includes: S1. The sliding support plate 4 is moved to the target distance and locked. The rotating shaft 8 is telescopic and automatically adjusts with the distance. The rotating plate 3 is rotated to the lateral position of the guide rail 1 in the direction of travel. S2. Place the mandrel horizontally between the two uppermost locking strips 6 of the two turntables 5. The mandrel will automatically lock into the corresponding position of the locking strip 6 according to its diameter (smaller diameter is closer to the center, larger diameter is closer to the edge). S3. After placing two mandrels, rotate the knob 65 corresponding to the retaining strip 6 between the mandrels. The lead screw 64 pushes the linkage block 63 to move. The linkage block 63 drives the slider 61 to slide along the retaining strip 6 through the connecting rod 62, so that the bonding strip 7 contacts the surface of the mandrel. S4. When the slider 61 moves, the connecting rod 62 rotates the worm 610 to drive the worm wheel 69, which in turn drives the bevel gear 68, causing the two driven bevel gears 67 to rotate in opposite directions. This automatically adjusts the included angle of the bonding strip 7 (the included angle increases when the diameter is small and decreases when the diameter is large), and the telescopic teeth 71 fully fit the arc surface of the mandrel through telescopic movement. S5. After each mandrel is placed, rotate the knob 65 corresponding to the retaining strip 6 between the previous mandrels until all mandrels are placed. Then rotate the rotating plate 3 to change the mandrels from a horizontal position to a vertical position consistent with the travel direction of the guide rail 1, and send them into the heat treatment furnace.

[0036] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-specification billet feeding device for mandrel heat treatment, comprising a guide rail (1), characterized in that, A slide plate (2) is slidably mounted on the guide rail (1). Two turntables (5) are symmetrically distributed on the slide plate (2). Each turntable (5) has multiple radially distributed locking strips (6). Each locking strip (6) has a sliding block (61). Each sliding block (61) has two "V"-shaped bonding strips (7). The two turntables (5) are connected together by a rotating shaft (8).

2. The multi-specification billet feeding device for mandrel heat treatment according to claim 1, characterized in that, Each of the sliders (61) is hinged to a connecting rod (62), and each connecting rod (62) is hinged to a linkage block (63).

3. A multi-specification billet feeding device for mandrel heat treatment according to claim 2, characterized in that, Each of the linkage blocks (63) is threaded with a lead screw (64), which is rotatably connected to the corresponding turntable (5). One end of the lead screw (64) is fixed with a knob (65).

4. A multi-specification billet feeding device for mandrel heat treatment according to claim 3, characterized in that, A connecting shaft (66) is fixed on the slider (61), and two bonding strips (7) are rotatably disposed in the connecting shaft (66). A driven bevel gear (67) is fixed on each of the opposite sides of the two bonding strips (7). A driving bevel gear (68) is rotatably disposed on the slider (61), and the driving bevel gear (68) meshes with the two driven bevel gears (67).

5. A multi-specification billet feeding device for mandrel heat treatment according to claim 4, characterized in that, One end of the drive bevel gear (68) is fixed with a worm gear (69), and a worm (610) that meshes with the worm gear (69) is rotatably mounted on the slider (61), and the worm (610) is fixed to the hinge shaft of the connecting rod (62).

6. A multi-specification billet feeding device for mandrel heat treatment according to claim 5, characterized in that, Each of the bonding strips (7) has multiple linearly arranged telescopic teeth (71) slidably arranged on the side of the mandrel blank, and a spring is provided between each telescopic tooth (71) and the bonding strip (7).

7. A multi-specification billet feeding device for mandrel heat treatment according to claim 6, characterized in that, The slide plate (2) is rotatably mounted on a rotating plate (3), and two turntables (5) are mounted on the rotating plate (3).

8. A multi-specification billet feeding device for mandrel heat treatment according to claim 7, characterized in that, The sliding plate (2) is slidably provided with support plates (4) on each of its adjacent sides, and the two turntables (5) are respectively rotatably provided on the two support plates (4).

9. A multi-specification billet feeding device for mandrel heat treatment according to claim 1, characterized in that, The rotating shaft (8) is a telescopic shaft that is retractable and restricts rotation.

10. A multi-specification billet feeding process for mandrel heat treatment, employing a multi-specification billet feeding device for mandrel heat treatment according to claim 8, characterized in that, include: S1. Slide the support plate (4) to the target distance and lock it in place. The rotating shaft (8) is telescopic and automatically adjusts with the distance. The rotating plate (3) rotates to the lateral position of the guide rail (1) in the direction of travel. S2. Place the mandrel horizontally between the two topmost clips (6) of the two turntables (5). The mandrel will automatically snap into the corresponding position of the clip (6) according to its diameter (smaller diameter is closer to the center, larger diameter is closer to the edge). S3. After placing two core rods, rotate the knob (65) corresponding to the locking strip (6) between the core rods. The screw (64) pushes the linkage block (63) to move. The linkage block (63) drives the slider (61) to slide along the locking strip (6) through the connecting rod (62), so that the bonding strip (7) contacts the surface of the core rod. S4. When the slider (61) moves, the connecting rod (62) rotates the worm (610) to drive the worm wheel (69), which drives the drive bevel gear (68) so that the two driven bevel gears (67) rotate in opposite directions, automatically adjusting the included angle of the bonding strip (7) (the included angle increases when the diameter is small and decreases when the diameter is large), and the telescopic tooth (71) fully fits the arc surface of the mandrel through telescopic extension; S5. After each mandrel is placed, rotate the knob (65) corresponding to the retaining strip (6) between the previous mandrels until all mandrels are placed. Then rotate the rotating plate (3) to change the mandrels from a horizontal position to a vertical position consistent with the direction of travel of the guide rail (1) and send them into the heat treatment furnace.

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