Multi-purpose furnace carburizing heat treatment lifting appliance for bit shank

Abstract

The utility model relates to a drill shank multi-purpose furnace carburizing heat treatment lifting appliance, and relates to the field of heat treatment lifting appliances, the drill shank multi-purpose furnace carburizing heat treatment lifting appliance comprises a plate body, the plate body is provided with a plurality of placing holes at intervals, the drill shank can be vertically inserted into the placing holes, the top edges of the placing holes are provided with annular chamfers, and the chamfers are used for making contact with boss parts on the outer side walls of the drill shank. The placing holes are distributed in the plate body in a rectangular array mode. According to the scheme, the contact position of the bit shank and the lifting appliance is only at the chamfer, and the contact area is small, so that the contact area of the bit shank and carburizing gas can be increased, and carburizing is more uniform; the gravity center of the bit shank is located below the lifting appliance, the bit shank is in a vertical state under the action of gravity through the guiding effect of the chamfer at the containing hole and can be adjusted to the vertical state in a self-adaptive mode, and the bit shank is arranged more orderly. The lifting appliance is of a plate-shaped structure, compared with a lifting appliance of a frame-shaped structure, the occupied size is greatly reduced, and the lifting appliance is easy to store.

Description

Technical Field

[0001] The present application relates to the field of heat treatment hangers, and in particular to a hanger for carburizing heat treatment of shank tail multi-purpose furnace. Background Art

[0002] The drill tail is the rock drilling tail. The drill tail is the part of the drill bit of the rock drilling machine that bears the impact and torque of the rock drill. It has high toughness and does not produce plastic deformation. It has high strength. The drill tail needs to undergo multiple heat treatment processes such as carburizing during processing. The drill tail is placed in a hoist and moved by the hoist.

[0003] The existing utility model patent with announcement number CN207918913U discloses a heat treatment hanger, including a basket for placing workpieces, the basket is provided with a plurality of channels connecting the inside and outside of the basket, the basket is provided with a plurality of workpiece support positions for supporting the workpieces and baffles for separating adjacent workpieces, and the adjacent workpieces are separated by a certain distance through the baffles to improve the permeability of the quenching medium.

[0004] Multiple workpieces are placed in the hanger. Regarding the above-mentioned related technologies, the hanger is a frame structure with four walls. If it is used to place the drill tail, it is easy to cause contact between the baffle and the drill tail, and the contact area between the drill tail and the hanger is also large, resulting in a reduction in the contact area between the drill tail and the carburizing gas, resulting in uneven carburizing. Utility Model Content

[0005] The present application provides a hanger for carburizing heat treatment of shank tails in a multi-purpose furnace. By placing the shank tails vertically and separating adjacent shank tails, contact between the shank tails is avoided and the contact area between the shank tail and the hanger is minimized, thereby increasing the contact area between the shank tail and the carburizing gas and making the carburizing more uniform.

[0006] The present application provides a multi-purpose furnace carburizing heat treatment hanger for brazing tails, which adopts the following technical solution:

[0007] A multi-purpose furnace carburizing heat treatment hanger for shank tails comprises a plate body, on which a plurality of placement holes for vertical insertion of shank tails are arranged at intervals, and the top edges of the placement holes are provided with an annular chamfer for contacting a boss portion of an outer wall of the shank tail.

[0008] By adopting the above technical solution, the shank is placed vertically in the placement hole, so that the boss of the shank is in contact with the chamfered wall surface. Since the center of gravity of the shank is located below the chamfer, the shank can be maintained in a vertical state under the guidance of the inclined surface of the chamfer. Since the contact position between the shank and the plate body is only at the chamfer, the contact area is very small, so the contact area between the shank and the carburizing gas can be increased, making the carburization more uniform.

[0009] Optionally, the placement holes are distributed in a rectangular array on the plate body.

[0010] By adopting the above technical solution, the drill tails are placed more neatly and it is convenient to calculate and count the number of drill tails.

[0011] Optionally, a plurality of ventilation holes are evenly arranged on the plate body, and the ventilation holes are regular hexagonal, so that the plate body has a honeycomb structure.

[0012] By adopting the above technical solution, the honeycomb structure plate body saves materials, increases the gas flow area, and is lighter while having high structural strength.

[0013] Optionally, a plurality of hanging holes are provided on the plate body.

[0014] By adopting the above technical solution, the plate body is lifted through the lifting holes.

[0015] Optionally, an adapter ring 1 is installed on the placement hole, the inner wall of the adapter ring 1 is a regular polygon, the number of sides of the regular polygon corresponds to the number of keys of the spline on the shank, and the cross-sectional size of the inner wall of the adapter ring 1 gradually decreases in the vertical downward direction.

[0016] By adopting the above technical solution, the bottom end of each key of the spline abuts against the corresponding inclined surface, thereby limiting the spline. By providing an inner wall of the adapter ring with multiple surfaces, the shank can be prevented from rotating.

[0017] Optionally, a plurality of spring sheets 1 are fixed to the bottom of the adapter ring 1 along the circumferential direction, and the outer wall of the spring sheet 1 is tightly pressed against the hole wall of the placement hole.

[0018] By adopting the above technical solution, the adapter ring 1 can be installed with the plate body by pressing the spring sheet 1 downward into the placement hole. The installation is relatively convenient and can be disassembled in the reverse direction.

[0019] Optionally, an adapter ring 2 is installed on the placement hole, the inner wall of the adapter ring 2 is annular, and the top edge of the adapter ring 2 is provided with a second annular chamfer.

[0020] By adopting the above technical solution, the second chamfer is also for the boss of the drill tail to abut. By installing the second adapter ring, the diameter of the second chamfer is smaller than the aforementioned chamfer, so that the present hanger can adapt to a smaller size of the drill tail, thereby expanding the scope of application of the present hanger.

[0021] Optionally, a plurality of spring pieces 2 are fixed to the bottom of the adapter ring 2 along the circumferential direction, and the outer wall of the spring piece 2 is pressed tightly against the hole wall of the placement hole.

[0022] By adopting the above technical solution, the second spring piece is pressed downward into the placement hole, so as to complete the installation of the second adapter ring and the plate body.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The contact position between the shank and the hanger is only at the chamfer, and the contact area is smaller than the surface area of ​​the chamfer. The contact area is very small, so the contact area between the shank and the carburizing gas can be increased, making the carburizing more uniform;

[0025] 2. The center of gravity of the drill tail is located below the hanger. Through the guiding effect of the chamfer at the placement hole, the drill tail is in a vertical state under the action of gravity and can be adaptively adjusted to a vertical state, so that the arrangement of the drill tail is more neat;

[0026] 3. The plate-shaped structure greatly reduces the occupied volume compared with the frame-shaped spreader, making it easy to store. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional diagram of the carburizing heat treatment hanger of the shank tail multi-purpose furnace of the first embodiment;

[0028] Figure 2 yes Figure 1 A magnified image of point A;

[0029] Figure 3 is a structural diagram of Embodiment 2;

[0030] Figure 4 is a usage state diagram of the adapter ring 1 of the second embodiment;

[0031] Figure 5 It is a structural diagram of embodiment 3.

[0032] Explanation of the accompanying drawings: 1. plate body; 11. ventilation hole; 12. hanging hole; 2. placement hole; 21. chamfer; 3. adapter ring 1; 31. spring piece 1; 4. adapter ring 2; 41. second chamfer; 42. spring piece 2. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-5 This application is described in further detail.

[0034] Embodiment 1:

[0035] Reference Figure 1 The present embodiment discloses a carburizing heat treatment hanger for a shank tail multi-purpose furnace, comprising a plate body 1, which is integrally cast from a high temperature resistant metal material and is rectangular.

[0036] Reference Figure 1 and Figure 2The plate body 1 is evenly provided with a plurality of ventilation holes 11, which are regular hexagonal and give the plate body 1 a honeycomb structure. The regular hexagonal ventilation holes 11 are large in size, giving the plate body 1 excellent ventilation, and the honeycomb structure of the plate body 1 saves materials and has high strength, thereby reducing weight.

[0037] The plate body 1 is provided with a plurality of lifting holes 12. In this embodiment, there are four lifting holes 12, which are respectively located near the four corners of the plate body 1. The lifting holes 12 are used to cooperate with the lifting hooks of the lifting equipment, so as to lift the plate body 1.

[0038] The plate body 1 is provided with a plurality of placement holes 2 for vertical insertion of the shank, and the placement holes 2 are distributed in a rectangular array on the plate body 1, so that the shank can be placed more neatly and the number of shank can be counted easily. The top edge of the placement hole 2 is provided with an annular chamfer 21, and the chamfer 21 is used to contact the boss portion of the outer wall of the shank. The boss portion of the outer wall of the shank generally refers to the end of the spline close to the middle of the shank, and can also be other bosses. It should be noted that when the shank is placed vertically, the spline is located near the top of the shank, and the center of gravity of the shank is below the spline.

[0039] It should be noted that the chamfer 21 can also be equivalently replaced by a rounded corner, which has the same technical effect and also falls within the protection scope of this application.

[0040] The implementation principle of a multi-purpose furnace carburizing heat treatment hanger for a shank tail in the embodiment of the present application is: vertically place the shank tail into the placement hole 2, so that the boss of the shank tail abuts against the wall surface of the chamfer 21. Since the center of gravity of the shank tail is located below the chamfer 21, the shank tail can be maintained in a vertical state under the guidance of the inclined surface of the chamfer 21. Even if the plate body 1 tilts or shakes during the movement, the shank tail can spontaneously adjust to a vertical state, and the shank tail will not fall off. During the carburizing process, no contact is generated between the shank tails. Since the contact position between the shank tail and the plate body 1 is only at the chamfer 21, and the contact area is smaller than the surface area of ​​the chamfer 21, the contact area is very small, so the contact area between the shank tail and the carburizing gas can be increased, making the carburizing more uniform.

[0041] Embodiment 2:

[0042] Reference Figure 3 and Figure 4 The difference between this embodiment and the first embodiment is that an adapter ring 3 is installed on the placement hole 2, and the inner wall of the adapter ring 3 is a regular polygon. The number of sides of the regular polygon corresponds to the number of keys of the spline on the shank, and the cross-sectional size of the inner wall of the adapter ring 3 gradually decreases in the vertical downward direction, so that the inner wall of the adapter ring 3 is a plurality of trapezoidal inclined surfaces.

[0043] A plurality of spring sheets 31 are fixed to the bottom of the adapter ring 3 along the circumferential direction, and the outer wall of the spring sheet 31 is tightly pressed against the hole wall of the placement hole 2.

[0044] The implementation principle of the second embodiment is as follows: by pressing the spring piece 31 downward into the placement hole 2, the installation of the adapter ring 3 and the plate body 1 can be completed. The inner wall shape of the adapter ring 3 is used to cooperate with the spline end of the drill tail. The bottom end of each key is respectively abutted against the corresponding inclined surface, thereby limiting the spline. By setting the inner wall of the adapter ring 3 with multiple surfaces, the drill tail can be prevented from rotating.

[0045] Embodiment three:

[0046] Reference Figure 5 The difference between this embodiment and the first embodiment is that: an adapter ring 2 is installed on the placement hole 2, the inner wall of the adapter ring 2 is annular, and the top edge of the adapter ring 2 is provided with an annular second chamfer 41.

[0047] A plurality of spring pieces 42 are fixed to the bottom of the adapter ring 4 along the circumferential direction, and the outer wall of the spring piece 42 is pressed tightly against the hole wall of the placement hole 2 .

[0048] The implementation principle of the third embodiment is: by pressing the second spring piece 42 downward into the placement hole 2, the second adapter ring 4 and the plate body 1 can be installed, the inside of the second adapter ring 4 is also for the drill tail to pass through, and the second chamfer 41 is also for the boss of the drill tail to abut. By installing the second adapter ring 4, the diameter of the second chamfer 41 is smaller than the chamfer 21 of the first embodiment, so that the sling can adapt to a smaller size of the drill tail without replacing the plate body 1, thereby expanding the scope of application of the sling.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A multi-purpose furnace carburizing heat treatment hanger for shank tail, characterized by: The invention comprises a plate body (1), on which a plurality of placement holes (2) for vertically inserting a shank tail are arranged at intervals, and the top edge of the placement hole (2) is provided with an annular chamfer (21), and the chamfer (21) is used to contact the boss portion of the outer wall of the shank tail.

2. The multi-purpose furnace carburizing heat treatment hanger for shank tail according to claim 1, characterized in that: The placement holes (2) are distributed on the plate body (1) in a rectangular array.

3. The multi-purpose furnace carburizing heat treatment hanger for shank tail according to claim 1, characterized in that: The plate body (1) is evenly provided with a plurality of ventilation holes (11), the ventilation holes (11) are regular hexagonal, and make the plate body (1) present a honeycomb structure.

4. The multi-purpose furnace carburizing heat treatment hanger for shank tail according to claim 1, characterized in that: The plate body (1) is provided with a plurality of hanging holes (12).

5. The multi-purpose furnace carburizing heat treatment hanger for shank tail according to claim 1, characterized in that: An adapter ring (3) is installed on the placement hole (2), the inner wall of the adapter ring (3) is a regular polygon, the number of sides of the regular polygon corresponds to the number of keys of the spline on the shank, and the cross-sectional size of the inner wall of the adapter ring (3) gradually decreases in the vertical downward direction.

6. The multi-purpose furnace carburizing heat treatment hanger for shank tail according to claim 5, characterized in that: A plurality of spring sheets (31) are fixed to the bottom of the adapter ring (3) along the circumferential direction, and the outer wall of the spring sheet (31) is tightly pressed against the hole wall of the placement hole (2).

7. The multi-purpose furnace carburizing heat treatment hanger for shank tail according to claim 1, characterized in that: The placement hole (2) is provided with an adapter ring 2 (4), the inner wall of the adapter ring 2 (4) is annular, and the top edge of the adapter ring 2 (4) is provided with an annular second chamfer (41).

8. The multi-purpose furnace carburizing heat treatment hanger for shank tail according to claim 7, characterized in that: A plurality of spring sheets (42) are fixed to the bottom of the second adapter ring (4) along the circumferential direction, and the outer wall of the second spring sheet (42) is tightly pressed against the hole wall of the placement hole (2).

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