Workpiece placing rack for heat treatment furnace

Abstract

The utility model discloses a work piece placing rack for a heat treatment furnace, which comprises a placing rack body and a lifting part, the placing rack body comprises two symmetrical screw rods, a plurality of support plates are arranged on the two screw rods in a sliding manner, and positioning sleeves are in threaded connection with the screw rods above and below each support plate; the top faces of the supporting plates are connected with a plurality of sets of oppositely-arranged supporting units, a plurality of through holes are formed in the supporting plates, lifting lugs are connected to the two sides of the supporting plate on the topmost layer, and lifting holes are formed in the lifting lugs. And the lifting part is positioned above the placing rack body and is used for placing the placing rack body into a heat treatment furnace or taking the placing rack body out of the heat treatment furnace. The two ends of the workpiece are placed on the supporting units, so that the workpiece is suspended, and comprehensive heat treatment is facilitated; and the distance between the adjacent supporting plates can be adjusted by screwing the positioning sleeves, so that the device is suitable for workpieces with different diameters or widths, and the adaptability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat treatment, in particular to a workpiece placement rack for a heat treatment furnace. Background Art

[0002] Currently, when heat treating batches of workpieces, the workpieces are usually placed on a heat treatment rack, and the heat treatment rack is placed in a heat treatment furnace.

[0003] After searching, it was found that the Chinese utility model patent with authorization publication number CN209024601U discloses a long-axis workpiece heat treatment rack. According to its description, the two ends of the long-axis workpiece are positioned and limited by the first support plate and the second support plate. During heat treatment, the warping deformation of the two ends of the workpiece and the rod body is reduced, the deformation amount is limited, and the rod body of the workpiece is ensured to remain on the same axis as much as possible, so as to improve the qualified rate of the workpiece.

[0004] However, the heat treatment rack in the above patent and the currently available heat treatment rack both have the following problems: (1) the positions of the first support plate and the second support plate are fixed, and the apertures of the first positioning hole and the second positioning hole are also fixed, so only workpieces of a specific diameter or length can be fixed, resulting in low adaptability; (2) it is inconvenient to place the placement rack in the heat treatment furnace, and it is also inconvenient to take the placement rack out of the heat treatment furnace. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a workpiece placement rack for a heat treatment furnace to solve the problems mentioned in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A workpiece placement rack for a heat treatment furnace includes a placement rack body and a lifting part. The placement rack body includes two symmetrical screws, and a plurality of support plates are slidably mounted on the two screws. Positioning sleeves are threadedly connected to the upper and lower parts of each support plate on the screws. The top surface of the support plate is connected to multiple groups of relatively arranged support units, and a plurality of through holes are provided on the support plate. Both sides of the topmost support plate are connected to lifting ears, and the lifting ears are provided with lifting holes. The lifting part is located above the placement rack body and is used to place the placement rack body into the heat treatment furnace or take the placement rack body out of the heat treatment furnace.

[0008] Preferably, each group of support units includes columns connected to both sides of the support plate, a vertical slide groove is opened on one side of the column, a slider is slidably connected in the slide groove, a hook is connected to the outer end of the slider, a first positioning hole is provided on the slider, and a plurality of second positioning holes connected to the slide groove are provided on the column, and the slider is fixed to the column by the cooperation of bolts, the second positioning holes and the first positioning holes.

[0009] Preferably, the lifting part includes a box body, in which a screw rod is rotatably connected, a motor is installed on one side of the box body, the motor is transmission-connected to one end of the screw rod, opposite threads are provided on both sides of the screw rod, and slides are threadedly connected on both sides of the screw rod, a sliding hole is provided at the bottom of the box body, and the two slides are slidably arranged in the sliding hole, and the opposite sides of the lower ends of the two slides are connected to a lifting rod that cooperates with the lifting hole.

[0010] Preferably, the lifting part further includes a connecting rod connected to the box body, and a flange is connected to the connecting rod.

[0011] Preferably, a pad is connected to the bottom surface of the bottom support plate.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The workpiece's ends are placed on support units, allowing it to suspend and facilitate comprehensive heat treatment. By rotating the positioning sleeves, the spacing between adjacent support plates can be adjusted to accommodate workpieces of varying diameters and widths, improving adaptability. The lifting unit allows the placement rack to be placed in and removed from the heat treatment furnace, improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 is a schematic diagram of the lifting part;

[0016] Figure 3 is a schematic diagram of the support unit;

[0017] Figure 4 This is the front view of the utility model after being placed in a heat treatment furnace;

[0018] In the figure: 1-screw, 2-support plate, 3-positioning sleeve, 4-through hole, 5-lifting ear, 6-column, 7-chute, 8-slider, 9-hook, 10-box, 11-screw, 12-motor, 13-slide plate, 14-suspender rod, 15-connecting rod, 16-flange, 17-pad. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example 1

[0021] See also Figure 1-4 A workpiece placement rack for a heat treatment furnace includes a placement rack body and a lifting portion. The placement rack body includes two symmetrical screws 1, on which a plurality of support plates 2 are slidably mounted. Positioning sleeves 3 are threadedly connected to the screws 1 above and below each support plate 2. By screwing the positioning sleeves 3, the position of the support plates can be adjusted, thereby adjusting the spacing between adjacent support plates to accommodate workpieces of different models. The top surfaces of the support plates 2 are connected to multiple groups of relatively arranged support units. The support plates 2 are provided with a plurality of through holes 4 to allow heat to pass through the through holes 4, thereby increasing the heated area of ​​the workpiece. Lifting ears 5 are connected to both sides of the topmost support plate 2, and the lifting ears 5 are provided with lifting holes. The screws, positioning sleeves, and lifting ears are all made of high-temperature resistant materials, such as ceramics.

[0022] Each support unit group includes columns 6 connected to both sides of the support plate. A vertical slot 7 is defined on one side of each column 6. Sliders 8 are slidably connected within each slot 7. Hooks 9 are attached to the outer ends of sliders 8. Sliders 8 are provided with first positioning holes, and columns 6 are provided with several second positioning holes that communicate with the slots. Sliders 8 are secured to columns 6 via bolts, the second positioning holes, and the first positioning holes. Placing the ends of a workpiece on the two hooks of a support unit allows the workpiece to be suspended in mid-air. The height of the hooks can be adjusted according to the height of the workpiece, improving adaptability.

[0023] The lifting part is located above the placement rack body and is used to place the placement rack body into the heat treatment furnace or take the placement rack body out of the heat treatment furnace. Specifically, the lifting part includes a box body 10, in which a screw rod 11 is rotatably connected. A motor 12 is installed on one side of the box body 10. The motor 12 is transmission-connected to one end of the screw rod 11. The two sides of the screw rod 11 are provided with opposite threads, and the two sides of the screw rod 11 are threadedly connected with slides 13. The bottom of the box body 10 is provided with a sliding hole. The two slides 13 are slidably arranged in the sliding hole. The opposite sides of the lower ends of the two slides 13 are connected to a suspension rod 14 that cooperates with the suspension hole. The lifting part also includes a connecting rod 15 connected to the box body, and a flange 16 is connected to the connecting rod 15. The flange 16 is used to connect to the lifting equipment. The lifting part is controlled to descend through the lifting equipment, and the two hanging rods 14 are located between the two lifting ears. Then the motor 12 is started to drive the screw rod 11 to rotate. During the rotation of the screw rod 11, the two slides 13 are driven to move in the opposite direction until the hanging rod 14 is inserted into the two hanging holes. Then the lifting part is pulled upward by the lifting equipment to remove the placement rack body from the heat treatment furnace.

[0024] Example 2

[0025] The difference between this embodiment and embodiment 1 is that the bottom surface of the bottom support plate 2 is connected with a pad 17. The pad 17 is located at the bottom of the heat treatment furnace to make the bottom support plate suspended, which is beneficial to heat treatment of the workpiece.

[0026] It should be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A workpiece placement rack for a heat treatment furnace, characterized in that: The utility model comprises a placing frame body and a lifting part, wherein the placing frame body comprises two symmetrical screw rods (1), a plurality of support plates (2) are slidably mounted on the two screw rods (1), a positioning sleeve (3) is threadedly connected to the upper and lower parts of each support plate (2) on the screw rods (1), a plurality of groups of support units arranged opposite to each other are connected to the top surface of the support plate (2), a plurality of through holes (4) are provided on the support plate (2), and lifting ears (5) are connected to both sides of the topmost support plate (2), and a lifting hole is provided on the lifting ears (5); The lifting portion is located above the placement rack body and is used to place the placement rack body into the heat treatment furnace or take the placement rack body out of the heat treatment furnace.

2. The workpiece placement rack for a heat treatment furnace according to claim 1, characterized in that: Each group of support units includes columns (6) connected to both sides of the support plate, a vertical slide groove (7) is opened on one side of the column (6), a slider (8) is slidably connected in the slide groove (7), the outer end of the slider (8) is connected to a hook (9), the slider (8) is provided with a first positioning hole, and the column (6) is provided with a plurality of second positioning holes connected with the slide groove, and the slider (8) is fixed to the column (6) by the cooperation of bolts, the second positioning holes and the first positioning holes.

3. The workpiece placement rack for a heat treatment furnace according to claim 2, characterized in that: The lifting part includes a box body (10), a screw rod (11) is rotatably connected in the box body (10), a motor (12) is installed on one side of the box body (10), the motor (12) is transmission-connected to one end of the screw rod (11), opposite threads are provided on both sides of the screw rod (11), and slide plates (13) are threadedly connected on both sides of the screw rod (11), a sliding hole is provided at the bottom of the box body (10), two slide plates (13) are slidably arranged in the sliding hole, and opposite sides of the lower ends of the two slide plates (13) are connected to a suspension rod (14) that cooperates with the suspension hole.

4. The workpiece placement rack for a heat treatment furnace according to claim 3, characterized in that: The lifting part further comprises a connecting rod (15) connected to the box body, and a flange (16) is connected to the connecting rod (15).

5. The workpiece placement rack for a heat treatment furnace according to claim 4, characterized in that: The bottom surface of the bottom support plate (2) is connected with a cushion block (17).

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