A heat treatment system for 3D printed parts

Abstract

This invention relates to the field of material processing equipment technology, and more particularly to a heat treatment system for 3D printed parts. The system includes a 3D printing apparatus, a heat treatment apparatus, and a material scanning apparatus. The material scanning apparatus includes a differential scanning calorimeter (DSC) body. The DSC body has a matching outer hole and outer cover, an inner hole and inner cover. The inner hole has a placement groove for placing a crucible. An outer sleeve rod is elastically connected to the outer cover. A mating rod that cooperates with the inner cover passes through the inner sleeve rod. Connecting rods are symmetrically arranged on the inner cover. Limiting grooves that cooperate with the connecting rods are symmetrically arranged on the outer sleeve rod. The other end of each connecting rod protrudes from the inner cover and is inserted into a tray for holding the crucible. Therefore, this invention can quickly determine the heat treatment temperature of the 3D printed part using a differential scanning calorimeter when the composition of the 3D printing material changes, simplifying the steps and time of placing the crucible into the DSC body, saving operation time, and improving heat treatment efficiency.

Description

Technical Field

[0001] This invention relates to the field of material processing equipment technology, and more particularly to a heat treatment system for 3D printed parts. Background Technology

[0002] Metal heat treatment is one of the important processes in mechanical manufacturing. Heat treatment can improve or enhance the performance of a workpiece by changing its internal microstructure or its surface chemical composition.

[0003] Additive manufacturing technology, or 3D printing technology for short, has become one of the most watched disruptive technologies in the manufacturing industry due to its ability to efficiently and quickly manufacture complex structures that cannot be produced by traditional processes. It can also obtain new design space by combining topology optimization simulation and lattice layout to meet indicators such as lightweight and ultra-high performance. Among them, selective laser melting metal 3D printing technology is one of the most widely used metal additive manufacturing technologies. It uses a precisely focused laser spot to quickly melt layers of laid metal powder to prepare complex precision parts with high performance, high density and high precision.

[0004] Currently, existing heat treatment systems for 3D printed parts, such as the patent with publication number CN116815088A, disclose a heat treatment method for high-chromium nickel-based high-temperature alloy 3D printed structural parts. This method involves placing the high-chromium nickel-based high-temperature alloy 3D printed part into a heat treatment furnace, performing vacuum treatment, and then repeatedly heating the high-chromium nickel-based high-temperature alloy 3D printed part in a vacuum environment. This effectively saves heat treatment time and costs. However, the aforementioned device only provides a heat treatment temperature range for a single material. When heat treating 3D printed parts, if the material composition changes, re-determining the heat treatment temperature requires a considerable amount of time. Using differential scanning calorimetry to assist in determining the heat treatment temperature of the 3D printed part results in a long operation time and low heat treatment efficiency.

[0005] How to quickly determine the heat treatment temperature of 3D printed parts using differential scanning calorimetry (DSC) when the composition of 3D printing materials changes, thereby improving the heat treatment effect and simplifying the process of placing the crucible into the DSC, saving operation time and improving heat treatment efficiency, has become a technical problem that needs to be solved.

[0006] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the Invention

[0007] To address the aforementioned shortcomings, the present invention aims to provide a heat treatment system for 3D printed parts. This system can quickly determine the heat treatment temperature of 3D printed parts using a differential scanning calorimeter when the composition of the 3D printing material changes, thereby improving the heat treatment effect. Furthermore, it simplifies the step of placing the crucible into the differential scanning calorimeter, saving operation time and improving heat treatment efficiency.

[0008] To achieve the above objectives, the present invention provides a heat treatment system for 3D printed parts, including a 3D printing apparatus for printing 3D printed parts, a heat treatment apparatus for heat treating 3D printed parts, and a material scanning apparatus for determining the heat treatment temperature of 3D printed parts.

[0009] The material scanning device includes a differential scanning calorimeter body. The differential scanning calorimeter body is provided with an outer hole and an outer cover, an inner hole and an inner cover. The inner hole has a placement groove for placing a crucible. An outer sleeve rod is elastically connected to the outer cover. A mating rod that cooperates with the inner cover passes through the inner sleeve rod. A connecting rod is symmetrically passed through the inner cover. A limiting groove that cooperates with the connecting rod is symmetrically provided on the outer sleeve rod. One end of the connecting rod has a tray that cooperates with the placement groove. The tray has symmetrical through holes for accommodating crucibles. A positioning element for fixing the crucible is symmetrically elastically connected to each through hole. A limiting outer rod that cooperates with the through hole is provided on the inner cover.

[0010] The inner cover is symmetrically provided with clearance holes and locking holes, and the mating rod is symmetrically and elastically connected with locking elements that alternately engage with the clearance holes or locking holes.

[0011] The rotating mating rod drives the outer sleeve rod to rotate. When the locking member and the locking hole are engaged, the connecting rod slides into the limiting groove and pulls the outer sleeve rod away from the tray, causing the tray to move. The limiting outer rod causes the crucible to disengage from the through hole.

[0012] According to the heat treatment system for 3D printed parts of the present invention, a plurality of positioning elements are elastically connected to the mating rod, and the inner wall of the outer sleeve rod is provided with positioning holes that mate with the positioning elements. The tray is elastically connected with positioning elements that mate with the connecting rod, and the connecting rod is provided with positioning holes that mate with the positioning elements.

[0013] According to the heat treatment system for 3D printed parts of the present invention, the inner cover is provided with a mating groove that mates with the mating rod, and the clearance hole and the locking hole are both provided on the outer periphery of the mating groove.

[0014] According to the heat treatment system for 3D printed parts of the present invention, the connecting rods are all slidably connected to the inner cover. The limiting groove includes a horizontal groove and a vertical groove, and the vertical groove communicates with the outside of the outer sleeve rod. One end of the connecting rod is bent and inserted into the limiting groove. The locking member is aligned with the clearance hole, and one end of the connecting rod is aligned with the vertical groove of the limiting groove. The mating rod can then be inserted into the mating groove on the inner cover. When the locking member and the locking hole are engaged, one end of the connecting rod is located in the horizontal groove of the limiting groove.

[0015] According to the heat treatment system for 3D printed parts of the present invention, the outer sleeve rod passes through the outer cover, and a protruding ring is sleeved on the outer sleeve rod inside the outer cover. The outer cover has a groove that cooperates with the protruding ring. The protruding ring is slidably disposed in the groove and can rotate in the groove. An elastic element abuts between the protruding ring and the groove.

[0016] According to the heat treatment system for 3D printed parts of the present invention, the end of each positioning member near the mating rod is inserted into the mating rod. The positioning member inside the mating rod is symmetrically provided with inserts. The mating rod is provided with slots that mate with the inserts. Each insert is slidably disposed in the slot, and an elastic element is provided between the insert and the slot.

[0017] According to the heat treatment system for 3D printed parts of the present invention, the inner cover is provided with symmetrical inner limiting rods at one end near the tray, and the outer limiting rods are all slidably sleeved on the outside of the inner limiting rods.

[0018] According to the heat treatment system for 3D printed parts of the present invention, each of the limiting outer rods is provided with a sliding groove at one end near the center of symmetry, and an insert rod is slidably provided in each sliding groove. The end of each insert rod near the center of symmetry is connected to a column, and one end of the column abuts against a tray.

[0019] According to the heat treatment system for 3D printed parts of the present invention, the differential scanning calorimeter body is provided with a positioning groove, and the positioning groove is provided with symmetrical positioning holes, and the two positioning holes are respectively used to place a crucible containing the sample and an empty crucible for the control.

[0020] The purpose of this invention is to provide a heat treatment system for 3D printed parts, including a 3D printing device, a heat treatment device, and a material scanning device. The material scanning device determines the exothermic peak of the 3D printed part, enabling heat treatment within a suitable temperature range, saving operation time and improving heat treatment efficiency. The system utilizes a structure consisting of an outer cover, an inner cover, and an outer sleeve rod. The outer and inner covers are used for positioning, and by rotating or pulling the matching rod and outer sleeve rod, two crucibles can be simultaneously placed into the placement slot of the differential scanning calorimeter (DSC) body, eliminating the need for manual handling of the crucibles and simplifying the process of placing them into the DSC body, thus saving operation time and improving heat treatment efficiency. In summary, the beneficial effects of this invention are: it can quickly determine the heat treatment temperature of the 3D printed part using a differential scanning calorimeter when the composition of the 3D printing material changes, improving the heat treatment effect; and it simplifies the process of placing the crucibles into the DSC body, saving operation time and improving heat treatment efficiency. Attached Figure Description

[0021] Figure 1 This is a structural diagram of the material scanning device of the present invention;

[0022] Figure 2 This is a structural diagram of the placement slot;

[0023] Figure 3 This is a structural diagram of the tray area;

[0024] Figure 4 This is a structural diagram of the limiting groove;

[0025] Figure 5 This is a cross-sectional view of the locking component;

[0026] Figure 6 This is a cross-sectional view of the locking hole;

[0027] Figure 7 This is a cross-sectional view of the inner limit rod.

[0028] Figure 8 This is a cross-sectional view of the positioning component;

[0029] In the diagram: 1-Differential scanning calorimeter body, 11-Outer hole, 111-Inner hole, 112-Placement groove, 12-Positioning groove, 121-Positioning hole, 2-Outer cover, 3-Inner cover, 31-Limiting inner rod, 311-Limiting outer rod, 312-Slide groove, 32-Connecting rod, 33-Allowing hole, 34-Locking hole, 4-Tray, 41-Through hole, 42-Positioning component, 43-Column, 431-Insertion rod, 5-Matching rod, 51-Outer rod, 52-Locking component, 53-Limiting groove, 6-Elastic component. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0031] In the description of this invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0033] See Figure 1 This invention provides a heat treatment system for 3D printed parts, including a 3D printing device, a heat treatment device, and a material scanning device. The 3D printing device uses pre-prepared powder to print 3D printed parts (the structure of the 3D printing device is the same as that of existing technology, and it is a 3D printer capable of printing metal structural parts; its specific structure and function will not be described in detail here). The heat treatment device can perform heat treatment on the 3D printed parts (the structure of the heat treatment device is the same as that of existing technology, including a resistance furnace, a quenching tank, etc.; its specific structure and function will not be described in detail here). The material scanning device can detect the changes in temperature of the 3D printed parts. The thermal signal is generated by measuring the change in heat flow of materials during heating or cooling to determine the phase transition temperature of the material, including but not limited to melting point, freezing point, and glass transition temperature. It can reveal phenomena such as phase transition and precipitation of materials, and can measure information such as thermal reaction, thermal decomposition, and polymerization of 3D printed parts during heating to determine the exothermic peak of the 3D printed parts, thereby determining the appropriate temperature for heat treatment. In use, the exothermic peak of the 3D printed parts is first determined by the material scanning device, and then the temperature of the heat treatment device is controlled to perform heat treatment within the appropriate temperature range of the 3D printed parts, thereby improving the performance of 3D printed parts more accurately.

[0034] Specifically, when using a 3D printing device, a three-dimensional model is first constructed using CAD software, and then slicing software is used to perform slicing discretization. The model is then imported into the 3D printing device, and the slicing information is imported into the computer. The 3D printing software performs relevant processing, adopting a layer-by-layer import process. Then, a laser irradiates the pre-spread metal powder to process it into a single layer of part. After that, the slicing thickness is increased, and the powder is spread on the forming cylinder. Each layer is then sequentially melted and sintered by laser. After processing, the part is removed from the substrate and subjected to heat treatment or other performance enhancement or surface treatment.

[0035] See Figure 1 , Figure 2 , Figure 3 and Figure 7 The material scanning device includes a differential scanning calorimeter body 1 (the structure of the differential scanning calorimeter body 1 is the same as that of the prior art; it is a conventional device for determining material parameters, and its specific structure and function will not be described in detail here). The differential scanning calorimeter body 1 has an outer hole 11, and an inner hole 111 is provided inside the outer hole 11. The inner hole 111 has a placement groove 112 for placing crucibles (referring to the crucible for holding the sample and the empty crucible for the control; during testing, the crucible pre-filled with the sample is weighed and tare, the sample is placed in this crucible and weighed again to determine the sample mass; then, as needed, it is selected whether to place the sample in this crucible). (A lid is placed on the crucible, and another empty crucible is used as a control). An outer cover 2 and an inner cover 3 are respectively provided on the outer hole 11 and the inner hole 111. An outer cover 51 is elastically connected to the outer cover 2 (the outer cover 51 passes through the outer cover 2, and a convex ring is fitted on the outer cover 51 inside the outer cover 2. The outer cover 2 has a groove that mates with the convex ring. The convex ring is slidably disposed in the groove and can rotate in the groove. An elastic element 6 abuts between the convex ring and the groove). Under the premise that the outer cover 51 is not disturbed by external force, the elastic element 6 at the outer cover 51 will press down on the outer cover 51 to prevent the outer cover 51 from moving in the vertical direction (see direction). Figure 7 The outer rod 51 is internally fitted with a mating rod 5. Several positioning elements 42 are elastically connected to the mating rod 5 (the end of each positioning element 42 near the mating rod 5 is inserted into the mating rod 5, and the positioning elements 42 inside the mating rod 5 are symmetrically provided with inserts. The mating rod 5 is provided with slots that mate with the inserts. The inserts are all slidably disposed in the slots, and elastic elements 6 are provided between the inserts and the slots). The inner wall of the outer rod 51 is provided with positioning holes that mate with the positioning elements 42. When the positioning elements 42 on the mating rod 5 mate with the positioning holes on the outer rod 51, the relative positions of the mating rod 5 and the outer rod 51 can be temporarily locked, and the mating rod 5 can drive the outer rod 51 to rotate.

[0036] See Figures 3-8The inner cover 3 has a mating groove that mates with the mating rod 5. Symmetrically arranged around the outer periphery of the mating groove on the inner cover 3 are clearance holes 33 and locking holes 34. The center line connecting the two clearance holes 33 is perpendicular to the center line connecting the two locking holes 34, and both clearance holes 33 connect to the outside of the inner cover 3 (see...). Figure 4 The mating rod 5 is symmetrically and elastically connected with locking elements 52 that alternately engage with the clearance hole 33 or the locking hole 34 (the connection method between the locking element 52 and the mating rod 5 is the same as the connection method between the positioning element 42 and the mating rod 5, and will not be described again here). When the locking element 52 engages with the locking hole 34, the inner cover 3 can be moved by moving the mating rod 5. When the locking element 52 rotates into the clearance hole 33, the inner cover 3 can be separated from the mating rod 5 by pulling the mating rod 5.

[0037] See Figures 3-8 A connecting rod 32 is symmetrically inserted through the inner cover 3. Each connecting rod 32 is an L-shaped bent rod structure and is slidably connected to the inner cover 3. An L-shaped limiting groove 53 is symmetrically provided on the outer cover rod 51 to mate with the connecting rod 32. The limiting groove 53 includes a horizontal groove and a vertical groove, with the vertical groove connecting to the outside of the outer cover rod 51. One end of the connecting rod 32 is bent and inserted into the limiting groove 53, while the other end of the connecting rod 32 extends vertically out of the inner cover 3. The end of the connecting rod 32 furthest from the inner cover 3 is inserted into the tray 4 for holding the crucible. A positioning element 42 that mates with the connecting rod 32 is elastically connected inside the tray 4 (the connection method between the positioning element 42 and the tray 4 is the same as the connection method between the positioning element 42 and the mating rod 5, and will not be described again here). The connecting rod 32 has a positioning hole that mates with the positioning element 42. By utilizing the positioning element 42 between the tray 4 and the connecting rod 32, the tray 4 and the connecting rod 32 can be separated and installed. The tray 4 is symmetrically provided with through holes 41. Two through holes 41 can be used to place crucibles that are used in conjunction with the differential scanning calorimeter body 1. The two through holes 41 are respectively used to place crucibles containing samples and empty crucibles for reference. Each through hole 41 is symmetrically and elastically connected with positioning elements 42 for fixing the position of the crucible (the connection method between positioning elements 42 and through holes 41 is the same as the connection method between positioning elements 42 and mating rods 5, and will not be described again here). The inner cover 3 is symmetrically provided with limiting inner rods 31 at one end near the tray 4. The outer side of the limiting inner rods 31 is slidably fitted with limiting outer rods 311 that cooperate with the through holes 41 (the limiting outer rods 311 are symmetrically provided with protrusions, and the limiting inner rods 31 are provided with relief grooves for the protrusions. The protrusions are slidably set in the relief grooves, and the limiting outer rods 311 will not detach from the limiting inner rods 31). The end of the limiting outer rods 311 near the tray 4 protrudes from the inner cover 3, and the friction between the limiting inner rods 31 and the limiting outer rods 311 is relatively large.

[0038] See Figures 3-8Rotate the mating rod 5, which drives the outer rod 51 to rotate. When the locking member 52 and the locking hole 34 are engaged, one end of the connecting rod 32 is located in the horizontal groove of the limiting groove 53, and pulls the outer rod 51 away from the tray 4. The outer rod 51 pulls the connecting rod 32, which in turn moves the tray 4 closer to the inner cover 3. When the limiting outer rod 311 abuts against the crucible in the through hole 41, as the tray 4 continues to move, the limiting outer rod 311 holds the crucible in place until the crucible and the through hole 41 and the positioning member 42 between the crucible are disengaged (according to the actual situation, the friction between the limiting inner rod 31 and the limiting outer rod 311 is greater than the elastic force of the elastic member 6 at the positioning member 42 between the through hole 41 and the crucible).

[0039] See Figures 1-3 Preferably, the differential scanning calorimeter body 1 is provided with a positioning groove 12, and positioning holes 121 are symmetrically provided in the positioning groove 12. The two positioning holes 121 are respectively placed in the crucible containing the sample and the empty crucible of the control. The crucible containing the sample and the empty crucible of the control are pre-positioned so that the two through holes 41 of the tray 4 are respectively aligned with the crucible containing the sample and the empty crucible of the control (if the crucible containing the sample is not covered, the sample inside is easy to fall off. The tray 4 can also be pre-placed in the positioning groove 12, and then the crucible containing the sample and the empty crucible of the control are filled into the through holes 41 respectively. The operator can choose flexibly according to the actual situation).

[0040] See Figure 3 and Figure 7 Preferably, each of the limiting outer rods 311 has a sliding groove 312 near the center of symmetry, and each of the sliding grooves 312 has a sliding insert rod 431. The end of each insert rod 431 near the center of symmetry is connected to a column 43, and one end of the column 43 abuts against the tray 4. When the tray 4 moves towards the side closer to the inner cover 3, the limiting outer rod 311 holds the crucible (hereinafter, "crucible" refers to the crucible containing the sample and the empty crucible for the control) until the crucible disengages from the through hole 41 and the positioning element 42 between the crucibles. At this time, the insert rod 431... 1. Slide within the groove 312. When the insertion rod 431 slides to the edge of the groove 312, as the tray 4 continues to move, the tray 4 drives the column 43, the insertion rod 431, and the limiting outer rod 311 to move closer to the inner cover 3, thereby causing the limiting outer rod 311 to retract part of the inner cover 3. Due to the large friction between the limiting inner rod 31 and the limiting outer rod 311, the limiting outer rod 311 can remain stationary after the tray 4 is removed, increasing the distance between the limiting outer rod 311 and the crucible and avoiding affecting the sample testing.

[0041] See Figures 3-8 Preferably, the elastic element 6 is a spring, which provides return power.

[0042] See Figures 3-8Specifically, in actual use, the operator can select an elastic element 6 with a suitable elastic coefficient according to the actual situation and the matching relationship between the various components of the present invention, and install it at the locking element 52, as well as at the positioning element 42 between the mating rod 5 and the outer sleeve rod 51, between the connecting rod 32 and the tray 4, and between the through hole 41 and the crucible.

[0043] In use, a 3D model is first constructed, and slicing software is used to discretize the model. Then, the model is imported into the 3D printing device for 3D printing. (Before printing, the alloy powder is placed in a drying oven for drying. If the powder is freshly made and stored for 7-10 days, it is dried at 70℃-120℃ for 4-6 hours. If it is older than 10 days, it is dried at 70℃-120℃ for 15-24 hours. At the same time, argon gas is simultaneously introduced into the printing chamber of the 3D printer, and the oxygen content is controlled below 200ppm. The substrate temperature is also heated to the set temperature.) After processing, the 3D printed part is obtained.

[0044] See Figures 1-8 When using the material scanning device, first align the locking member 52 with the clearance hole 33 (at this time, one end of the connecting rod 32 is aligned with the vertical groove of the limiting groove 53). Then, insert the mating rod 5 into the mating groove on the inner cover 3 and rotate the mating rod 5. The mating rod 5 drives the outer rod 51 to rotate, and the locking member 52 engages with the locking hole 34 (at this time, one end of the connecting rod 32 is located in the horizontal groove of the limiting groove 53). Align the through hole 41 of the tray 4 with the crucible containing the sample and the empty crucible for reference. Then, place the tray 4 on the two crucibles and temporarily fix the two crucibles using the positioning member 42 in the through hole 41. Move the outer cover 2 and the inner cover by holding the outer cover 2 or the outer rod 51. With the structure in position 3, place the outer cover 2 and inner cover 3 onto the outer hole 11 and inner hole 111 respectively. At this time, the tray 4 is exactly in the placement groove 112. Pull the outer sleeve rod 51 away from the tray 4. The outer sleeve rod 51 pulls the connecting rod 32 to move the tray 4 closer to the inner cover 3. When the limiting outer rod 311 abuts against the crucible in the through hole 41, as the tray 4 continues to move, the limiting outer rod 311 holds the crucible in place until the crucible disengages from the through hole 41 and the positioning part 42 between the crucible. Then, remove the outer cover 2, inner cover 3 and other structures, remove the tray 4 and the fitting rod 5, and finally put the outer cover 2 and inner cover 3 back onto the outer hole 11 and inner hole 111 respectively.

[0045] This invention provides a heat treatment system for 3D printed parts, including a 3D printing device, a heat treatment device, and a material scanning device. The material scanning device determines the exothermic peak of the 3D printed part, enabling heat treatment within a suitable temperature range, saving operation time and improving heat treatment efficiency. The system utilizes a structure consisting of an outer cover, an inner cover, and an outer sleeve rod. The outer and inner covers are used for positioning, and by rotating or pulling the connecting rod and outer sleeve rod, two crucibles can be simultaneously placed into the placement slot of the differential scanning calorimeter (DSC) body, eliminating the need for manual handling of the crucibles and simplifying the process of placing them into the DSC body, thus saving operation time and improving heat treatment efficiency. In summary, the beneficial effects of this invention are: it can quickly determine the heat treatment temperature of the 3D printed part using a differential scanning calorimeter when the composition of the 3D printing material changes, improving the heat treatment effect; and it simplifies the process of placing the crucibles into the DSC body, saving operation time and improving heat treatment efficiency.

[0046] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A heat treatment system for 3D printed parts, characterized in that, It includes a 3D printing apparatus for printing 3D printed parts, a heat treatment apparatus for heat-treating 3D printed parts, and a material scanning apparatus for determining the heat treatment temperature of 3D printed parts. The material scanning device includes a differential scanning calorimeter body. The differential scanning calorimeter body is provided with an outer hole and an outer cover, an inner hole and an inner cover. The inner hole is provided with a placement groove for placing a crucible. An outer sleeve rod is elastically connected to the outer cover. A mating rod that cooperates with the inner cover passes through the inner sleeve rod. A connecting rod is symmetrically passed through the inner cover. A limiting groove that cooperates with the connecting rod is symmetrically provided on the outer sleeve rod. A tray that cooperates with the placement groove is provided at one end of the connecting rod. A through hole for accommodating the crucible is symmetrically provided on the tray. A positioning element for fixing the crucible is symmetrically elastically connected in each through hole. A limiting outer rod that cooperates with the through hole is provided on the inner cover. Each of the limiting outer rods has a sliding groove at one end near the center of symmetry, and an insert rod is slidably provided in each sliding groove. The insert rod is connected to a column at one end near the center of symmetry, and one end of the column abuts against the tray. The inner cover is symmetrically provided with clearance holes and locking holes. The mating rod is symmetrically elastically connected with locking elements that alternately cooperate with the clearance holes or locking holes. The rotating mating rod drives the outer sleeve rod to rotate. When the locking element and the locking hole are engaged, the connecting rod slides into the limiting groove and pulls the outer sleeve rod away from the tray. The outer sleeve rod pulls the connecting rod, causing the tray to move closer to the inner cover. When the limiting outer rod abuts against the crucible in the through hole, as the tray continues to move, the limiting outer rod holds the crucible in place until the crucible disengages from the through hole and the positioning element between the crucible, causing the crucible to disengage from the through hole.

2. The heat treatment system for 3D printed parts according to claim 1, characterized in that, The mating rod is elastically connected to several positioning elements, the inner wall of the outer sleeve rod is provided with positioning holes that mate with the positioning elements, the tray is elastically connected to a positioning element that mates with the connecting rod, and the connecting rod is provided with positioning holes that mate with the positioning elements.

3. The heat treatment system for 3D printed parts according to claim 1, characterized in that, The inner cover is provided with a mating groove that mates with the mating rod, and the clearance hole and the locking hole are both located on the outer periphery of the mating groove.

4. The heat treatment system for 3D printed parts according to claim 3, characterized in that, All connecting rods are slidably connected to the inner cover. The limiting groove includes a horizontal groove and a vertical groove, and the vertical groove connects to the outside of the outer rod. One end of the connecting rod is bent and inserted into the limiting groove. With the locking member aligned with the clearance hole and one end of the connecting rod aligned with the vertical groove of the limiting groove, the mating rod can be inserted into the mating groove on the inner cover. When the locking member and the locking hole are engaged, one end of the connecting rod is located in the horizontal groove of the limiting groove.

5. The heat treatment system for 3D printed parts according to claim 1, characterized in that, The outer sleeve rod is inserted into the outer cover, and a protruding ring is fitted on the outer sleeve rod inside the outer cover. The outer cover has a groove that mates with the protruding ring. The protruding ring is slidably disposed in the groove and can rotate within the groove. An elastic element abuts between the protruding ring and the groove.

6. The heat treatment system for 3D printed parts according to claim 2, characterized in that, The end of each positioning member near the mating rod is inserted into the mating rod. The positioning member inside the mating rod is symmetrically provided with inserts. The mating rod is provided with slots that mate with the inserts. Each insert is slidably disposed in the slot, and an elastic element is provided between the insert and the slot.

7. The heat treatment system for 3D printed parts according to claim 1, characterized in that, The inner cover is symmetrically provided with inner limiting rods at one end near the tray, and the outer limiting rods are all slidably sleeved on the outside of the inner limiting rods.

8. The heat treatment system for 3D printed parts according to claim 1, characterized in that, The differential scanning calorimeter body is provided with a positioning groove, and symmetrical positioning holes are provided in the positioning groove. The two positioning holes are respectively used to place the crucible containing the sample and the empty crucible for the control.

Images