Clamping jig for carburizing and quenching

Abstract

This utility model discloses a clamping fixture for carburizing and quenching, including two parallel hanging beams connected at both ends by a reinforcing rod. Multiple positioning shafts are detachably connected between the two hanging beams via a positioning mechanism. One end of half of the positioning shafts is provided with a positioning fixing plate. An adjustable support sleeve connected to the positioning fixing plate is provided on the outside of the positioning shaft. The adjustable support sleeve has evenly distributed circumferential holes for inserting long shaft-like parts. This utility model, through the positioning fixing plate, allows for rapid positioning of the adjustable support sleeve. Multiple part insertion holes simultaneously support long shaft-like parts, preventing single-point deformation of the long shaft-like parts. The annular partition baffles allow disc-like parts to be inserted between adjacent annular partition baffles, ensuring rapid circulation of the quenching medium between the disc-like parts and reducing cooling stress differences.

Description

Technical Field

[0001] This utility model relates to the field of carburizing and quenching technology, specifically to a clamping fixture for carburizing and quenching processing. Background Technology

[0002] Carburizing and quenching, as a key process for improving the surface hardness and wear resistance of metal parts, is widely used in the machinery manufacturing industry. In the carburizing and quenching process of long shafts and disc-shaped parts, the design of the clamping fixture directly affects the heat treatment quality of the parts. Traditional clamping methods often use single-point suspension or simple clamping, which have significant drawbacks: for long shaft parts, due to their own weight and the impact of the quenching medium, single-point support easily leads to gravitational bending moments, causing bending deformation; while when disc-shaped parts are stacked, the flow of the quenching medium is restricted, resulting in uneven cooling rates between parts, generating residual stress differences, and affecting dimensional stability and mechanical properties. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a clamping fixture for carburizing and quenching processes.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] This utility model relates to a clamping fixture for carburizing and quenching processing, comprising two parallel hanging beams connected at both ends by a reinforcing rod. Multiple positioning shafts are detachably connected between the two hanging beams via a positioning mechanism. One end of half of the positioning shafts is provided with a positioning fixing plate, and an adjustable support sleeve connected to the positioning fixing plate is provided on the outside of the positioning shaft. The adjustable support sleeve has evenly distributed part insertion holes for inserting long shaft-type parts around its circumference. The remaining half of the positioning shafts are used to suspend disc-type parts, and multiple annular separating baffles for separating disc-type parts are sleeved on the positioning shafts.

[0006] As a preferred embodiment of the present invention, the positioning mechanism includes two positioning protrusions at the end of the positioning shaft, and the hanging beam is provided with a plurality of positioning grooves that match the positioning protrusions.

[0007] As a preferred embodiment of this utility model, the bottom end of the positioning protrusion is provided with a plurality of equally spaced serrations, and the inner wall of the positioning groove is provided with a serrated groove that matches the serrations.

[0008] As a preferred embodiment of the present invention, one of the positioning protrusions is fixedly connected to one end of the positioning shaft, and the other positioning protrusion is connected to the other end of the positioning shaft through a detachable component.

[0009] As a preferred technical solution of this utility model, the detachable component includes a threaded connecting rod at one end of the positioning shaft, a connecting hole for the threaded connecting rod to pass through on the positioning protrusion, a locking nut being threadedly connected to one end of the threaded connecting rod passing through the connecting hole, and the outer diameter of the threaded connecting rod being smaller than the outer diameter of the positioning shaft.

[0010] As a preferred technical solution of this utility model, the adjustable support sleeve includes an inner sleeve disposed on the outer wall of the positioning shaft, and multiple outer sleeves are connected to the outside of the inner sleeve by threads, with part insertion holes opened on the outer sleeves.

[0011] As a preferred technical solution of this utility model, the positioning and fixing plate has two rectangular and symmetrical positioning through holes, one end of the inner sleeve is provided with a positioning plate, and the positioning plate is provided with a positioning rod passing through the positioning through hole.

[0012] As a preferred technical solution of this utility model, a limiting hole is provided at the part of the positioning rod that passes through the positioning through hole, and a T-shaped limiting pin is inserted into the two limiting holes.

[0013] As a preferred embodiment of this utility model, the two ends of the annular partition baffle are provided with a plurality of partition struts that are circumferentially and equally distributed, and the ends of the partition struts are spherical.

[0014] The beneficial effects of this utility model are:

[0015] This type of clamping fixture for carburizing and quenching can quickly position the adjustable support sleeve through the positioning and fixing plate. Multiple part insertion holes can support long shaft parts at the same time, avoiding deformation of long shaft parts under single-point stress. Through the annular partition baffle, disc parts can be clamped between two adjacent annular partition baffles, which can ensure rapid circulation of quenching medium between disc parts and reduce cooling stress differences. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is an exploded structural diagram of the clamping fixture for carburizing and quenching processing according to this utility model;

[0018] Figure 2 This is a schematic diagram of the hanging beam structure of the clamping fixture for carburizing and quenching processing according to this utility model;

[0019] Figure 3 This is a schematic diagram of the connection structure between the positioning shaft and the adjustable support sleeve of the clamping fixture for carburizing and quenching processing according to this utility model.

[0020] Figure 4 This is a schematic diagram of the connection structure between the positioning shaft and the annular partition baffle of the clamping fixture for carburizing and quenching processing according to this utility model.

[0021] Figure 5 This is a schematic diagram of the positioning protrusion and sawtooth connection structure of the clamping fixture for carburizing and quenching processing of this utility model.

[0022] Figure 6 This is a cross-sectional view of the positioning shaft and adjustable support sleeve connection of the clamping fixture for carburizing and quenching processing according to this utility model.

[0023] In the diagram: 1. Hanging beam; 2. Positioning mechanism; 3. Positioning shaft; 4. Positioning fixing plate; 5. Adjustable support sleeve; 501. Inner sleeve; 502. Outer sleeve; 6. Part insertion hole; 7. Annular partition baffle; 8. Partition support rod; 9. Positioning protrusion; 10. Positioning groove; 11. Serrated edge; 12. Serrated groove; 13. Positioning through hole; 14. Positioning backing plate; 15. Positioning insert rod; 16. Limiting hole; 17. Limiting pin; 18. Reinforcing rod; 19. Detachable component; 20. Threaded connecting rod; 21. Connecting hole; 22. Locking nut. Detailed Implementation

[0024] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0025] Example: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the clamping fixture for carburizing and quenching of this utility model includes two parallel hanging beams 1. Each hanging beam 1 has a fixing ring at both ends for fixing it. The two ends of the two hanging beams 1 are connected by a reinforcing rod 18. Multiple positioning shafts 3 are detachably connected between the two hanging beams 1 via a positioning mechanism 2. Half of the positioning shafts 3 have a positioning fixing plate 4 at one end. An adjustable support sleeve 5 connected to the positioning fixing plate 4 is provided on the outside of each positioning shaft 3. The adjustable support sleeve 5 has evenly distributed circumferential grooves for inserting long... The shaft-type parts have insertion holes 6; the remaining half of the positioning shafts 3 are used to suspend disc-type parts, and multiple annular partition baffles 7 are sleeved on the positioning shafts 3 to separate the disc-type parts. The adjustable support sleeve 5 can be quickly positioned by the positioning and fixing plate 4. Multiple insertion holes 6 support the long shaft-type parts at the same time, avoiding deformation of the long shaft-type parts due to single-point stress. The annular partition baffles 7 can be used to insert the disc-type parts between two adjacent annular partition baffles 7, which can ensure that the quenching medium circulates quickly between the disc-type parts and reduce the difference in cooling stress.

[0026] The positioning mechanism 2 includes two positioning protrusions 9 at the end of the positioning shaft 3. The hanging beam 1 is provided with a plurality of positioning grooves 10 that match the positioning protrusions 9. The bottom end of the positioning protrusions 9 is provided with a plurality of equally spaced serrations 11. The inner wall of the positioning groove 10 is provided with a serrated groove 12 that matches the serrations 11. After placing long shaft-type parts or disc-type parts on the positioning shaft 3, the positioning protrusions 9 at the end of the positioning shaft 3 are placed in the positioning groove 10. The serrations 11 match the serrated groove 12 to prevent sliding displacement caused by thermal expansion of materials at high temperatures.

[0027] One of the positioning protrusions 9 is fixedly connected to one end of the positioning shaft 3, and the other positioning protrusion 9 is connected to the other end of the positioning shaft 3 through a detachable component 19. The detachable component 19 includes a threaded connecting rod 20 at one end of the positioning shaft 3. A connecting hole 21 is provided on the positioning protrusion 9 for the threaded connecting rod 20 to pass through. A locking nut 22 is threadedly connected to one end of the threaded connecting rod 20 that passes through the connecting hole 21. The outer diameter of the threaded connecting rod 20 is smaller than the outer diameter of the positioning shaft 3. After placing a long shaft-like part or a disc-like part on the positioning shaft 3, the threaded connecting rod 20 at the end of the positioning shaft 3 passes through the connecting hole 21, and then the locking nut 22 is screwed on, so that the positioning protrusion 9 can be fixed to the end of the positioning shaft 3.

[0028] The adjustable support sleeve 5 includes an inner sleeve 501 located on the outer wall of the positioning shaft 3. Multiple outer sleeves 502 are connected to the outside of the inner sleeve 501 by threads. Part insertion holes 6 are opened on the outer sleeves 502, and the distance between two adjacent outer sleeves 502 can be adjusted.

[0029] The positioning fixing plate 4 has two rectangular and symmetrical positioning through holes 13. One end of the inner sleeve 501 is provided with a positioning backing plate 14. The positioning backing plate 14 is provided with a positioning rod 15 that passes through the positioning through hole 13. The part of the positioning rod 15 that passes through the positioning through hole 13 is provided with a limiting hole 16. T-shaped limiting pins 17 are inserted into the two limiting holes 16, which can quickly position the adjustable support sleeve 5.

[0030] The annular partition baffle 7 has multiple partition struts 8 that are circumferentially and equidistantly distributed at both ends. The ends of the partition struts 8 are spherical to prevent disc-shaped parts from stacking with the annular partition baffle 7.

[0031] During operation, this type of clamping fixture for carburizing and quenching can quickly position the adjustable support sleeve 5 via the positioning and fixing plate 4. Multiple part insertion holes 6 simultaneously support long shaft-type parts, preventing deformation from single-point stress. The annular partition baffles 7 allow disc-type parts to be inserted between adjacent baffles, ensuring rapid circulation of the quenching medium between the disc-type parts and reducing cooling stress differences. In use, first remove the positioning shaft 3 from the two hanging beams 1, then unscrew the locking nut 22. To separate the positioning protrusion 9 from the positioning shaft 3, the adjustable support sleeve 5 is fitted onto the positioning shaft 3, and the positioning rod 15 and the positioning through hole 13 are used for quick positioning. The positioning pin 17 is used for limiting, and then the positioning protrusion 9 is fixed to the end of the positioning shaft 3. Long shaft-type parts are passed through multiple part insertion holes 6. When fixing disc-type parts, a ring-shaped partition baffle 7 is fitted onto the positioning shaft 3 for each disc-type part, and then another disc-type part is fitted. In this way, multiple disc-type parts can be fixed. Finally, the positioning protrusion 9 is fixed to the end of the positioning shaft 3.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A clamping fixture for carburizing and quenching processing, characterized in that, It includes two parallel hanging beams (1), the two ends of the two hanging beams (1) are connected by a reinforcing rod (18), and multiple positioning shafts (3) are detachably connected between the two hanging beams (1) by a positioning mechanism (2). One end of half of the positioning shafts (3) is provided with a positioning fixing plate (4). The outside of the positioning shaft (3) is provided with an adjustable support sleeve (5) connected to the positioning fixing plate (4). The adjustable support sleeve (5) has parts insertion holes (6) for inserting long shaft-type parts evenly distributed around its circumference. The remaining half of the positioning shafts (3) are used to suspend disc-type parts, and the positioning shafts (3) are fitted with a plurality of annular partition baffles (7) for separating disc-type parts.

2. The clamping fixture for carburizing and quenching according to claim 1, characterized in that, The positioning mechanism (2) includes two positioning protrusions (9) at the end of the positioning shaft (3), and the hanging beam (1) is provided with a plurality of positioning grooves (10) that match the positioning protrusions (9).

3. The clamping fixture for carburizing and quenching according to claim 2, characterized in that, The bottom end of the positioning protrusion (9) is provided with a plurality of equally spaced (11) protrusions, and the inner wall of the positioning groove (10) is provided with a sawtooth groove (12) that matches the sawtooth (11).

4. The clamping fixture for carburizing and quenching according to claim 3, characterized in that, One of the positioning protrusions (9) is fixedly connected to one end of the positioning shaft (3), and the other positioning protrusion (9) is connected to the other end of the positioning shaft (3) through a detachable component (19).

5. The clamping fixture for carburizing and quenching according to claim 4, characterized in that, The detachable component (19) includes a threaded connecting rod (20) at one end of the positioning shaft (3). The positioning protrusion (9) has a connecting hole (21) through which the threaded connecting rod (20) passes. A locking nut (22) is threaded to one end of the threaded connecting rod (20) through the connecting hole (21). The outer diameter of the threaded connecting rod (20) is smaller than the outer diameter of the positioning shaft (3).

6. The clamping fixture for carburizing and quenching according to claim 1, characterized in that, The adjustable support sleeve (5) includes an inner sleeve (501) on the outer wall of the positioning shaft (3), and multiple outer sleeves (502) are connected to the outside of the inner sleeve (501) by threads. The part insertion hole (6) is opened on the outer sleeve (502).

7. The clamping fixture for carburizing and quenching according to claim 6, characterized in that, The positioning fixing plate (4) has two rectangular and symmetrical positioning through holes (13). One end of the inner sleeve (501) is provided with a positioning plate (14), and the positioning plate (14) is provided with a positioning rod (15) that passes through the positioning through hole (13).

8. The clamping fixture for carburizing and quenching according to claim 7, characterized in that, The positioning rod (15) has a limiting hole (16) at the part that passes through the positioning through hole (13), and a T-shaped limiting pin (17) is inserted into the two limiting holes (16).

9. The clamping fixture for carburizing and quenching according to claim 1, characterized in that, The annular partition baffle (7) has multiple partition struts (8) that are circumferentially equidistant at both ends, and the ends of the partition struts (8) are spherical.

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