Small sample clamping-force-free heat treatment fixture for Gleeble thermal simulation testing machine
By using a clamping unit with a cylindrical shaft pin head on the Gleeble thermal simulation testing machine, the problem of clamping force for small-sized specimens during heat treatment was solved, achieving clamping force-free heat treatment, expanding the testing range of the testing machine and reducing costs.
Patent Information
- Application Number
- CN202423181346.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2034-12-23
AI Technical Summary
In the prior art, material dimensions that do not meet the Gleeble test conditions prevent heat treatment, and clamping forces cause creep and deviations in experimental results. In particular, samples with a length of less than 80 mm cannot be stably measured by the dilatometer.
A clamping unit with cylindrical shaft pins at both ends of the specimen is used to clamp the specimen without clamping force through pin connection. The copper clamp and pin design ensures that the specimen is not compressed during heat treatment.
It enables forceless heat treatment of small-sized samples, expands the testing range of thermal simulation testing machines, reduces processing costs, and solves the problems of experimental errors and sample slippage caused by clamping force.
Smart Images
Figure CN223910836U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of thermal simulation physical test, and relates to a small pattern non-clamping force heat treatment fixture for Gleeble thermal simulation testing machine. BACKGROUND
[0002] In the process of material heat treatment experiment, when the experiment is completed by using gleeble, the size of the material cannot meet the conditions of some experiments of gleeble and cannot be completed.
[0003] The clamping force can aggravate the creep of the material in high temperature and lead to deviation of experimental results, and some materials cannot be processed into 80mm long rod samples due to size limitation. The length limitation has a particularly obvious influence on CCT experiment, and the short sample cannot bear the weight of the dilatometer, and the sample will directly slide off, and if the clamping force is increased, the sample will be compressed under the clamping force in high temperature, and the measurement of the expansion data is affected.
[0004] Therefore, a non-clamping force heat treatment fixture capable of effectively solving the problem that the sample with a thickness of less than 50mm is not pressed by the clamping force of the two ends of the indenter for heat treatment or CCT measurement is required. CONTENT OF THE UTILITY MODEL
[0005] In order to solve the above technical problems, the utility model provides a small pattern non-clamping force heat treatment fixture for Gleeble thermal simulation testing machine. The sample is clamped by the cylindrical shaft pin head of the two shaft pins located at the two ends of the sample, and the heat treatment of the small pattern is realized without clamping force.
[0006] In order to realize the above technical purpose, the utility model provides the following technical scheme:
[0007] A small pattern non-clamping force heat treatment fixture for Gleeble thermal simulation testing machine, the fixture comprises: a sample with an inner groove at both ends, and two groups of fixture units connected by a pin at the grooves at both ends of the sample;
[0008] The two groups of fixture units are the same in structure, and each group of fixture units comprises a pin and two copper fixtures with the same shape;
[0009] The pin comprises a circular truncated cone body and a cylindrical pin head arranged at one end of the circular truncated cone body; the cylindrical pin head and the upper bottom surface of the circular truncated cone body are arranged perpendicular to each other;
[0010] Each group of fixture units is connected by the cylindrical pin head of the pin and the inner groove at one end of the sample;
[0011] Each of the copper fixtures is a quadrangular prism with a right-angled trapezoidal longitudinal section, and a semicircular platform-shaped groove is arranged on the central axis of the side surface of the right-angled waist of the copper fixture; the two semicircular platform-shaped grooves of the two copper fixtures in the same group of fixture units jointly define a space for accommodating the circular platform-shaped body of the plug.
[0012] Further, the test sample includes a test sample body and two inner grooves respectively arranged at two ends of the test sample body.
[0013] Further, the test sample body is a cylinder.
[0014] Further, the depth of the two inner grooves at the two ends of the test sample body is greater than or equal to the length of the cylindrical plug head of the plug.
[0015] Further, the diameter of the inner groove = the diameter of the cylindrical plug head + d; d is a reasonable difference, and the value range is 0-3 mm.
[0016] Further, the length of the test sample body is ≤ 50 mm.
[0017] Further, the length of the test sample body + 2x the length of the circular platform-shaped body of the plug = 80 mm + a reasonable difference, and the value range is 0-3 mm.
[0018] Further, the circular platform-shaped body and the cylindrical plug head of the plug are both made of copper.
[0019] The Gleeble thermal simulation testing machine with the small sample non-clamping force heat treatment fixture has the advantages that:
[0020] The Gleeble thermal simulation testing machine with the small sample non-clamping force heat treatment fixture provided by the utility model clamps the test sample through the cylindrical shaft plug head of the two shaft plugs at the two ends of the test sample, and realizes the heat treatment of the small sample without clamping force.
[0021] The Gleeble thermal simulation testing machine with the small sample non-clamping force heat treatment fixture greatly expands the size requirement of the thermal simulation testing machine for the non-clamping force test sample, reduces the expenditure of manufacturing and processing special fixtures, and saves the test cost. DRAWINGS:
[0022] Figure 1 It is a structure schematic view of a Gleeble thermal simulation testing machine with a small sample non-clamping force heat treatment fixture in the utility model embodiment.
[0023] The drawing mark: 1. sample; 2. plug; 3. copper fixture. CONCRETE IMPLEMENTATION
[0024] The technical scheme of the utility model will be further described in combination with specific embodiments and drawings.
[0025] The embodiment provides a small-pattern non-clamping-force heat treatment fixture for a Gleeble thermal-mechanical simulator, which comprises a sample 1 with an inner groove at two ends, and two sets of fixture units connected through a pin at the grooves at the two ends of the sample. Figure 1 As shown in the figure, the fixture comprises a sample 1 with an inner groove at two ends, and two sets of fixture units connected through a pin at the grooves at the two ends of the sample.
[0026] The two sets of fixture units are identical in structure, and each set of fixture unit comprises a pin 2 and two copper fixtures 3 which are identical in shape.
[0027] The pin comprises a circular truncated cone body and a cylindrical pin head arranged at one end of the circular truncated cone body; the cylindrical pin head and the upper bottom surface of the circular truncated cone body are arranged perpendicularly to each other.
[0028] Each set of fixture unit is connected through the cylindrical pin head of the pin and the inner groove at one end of the sample.
[0029] Each copper fixture is a quadrangular prism with a right-angled trapezoidal longitudinal section, and a semicircular truncated cone groove is arranged at the central axis of the side surface of the right-angled waist of the copper fixture; the two semicircular truncated cone grooves of the two copper fixtures in the same set of fixture units jointly define a space for accommodating the circular truncated cone body of the pin. Specifically, the accommodation space formed by the two copper fixtures is a circular truncated cone space which is adapted to the shape of the circular truncated cone body of the pin. The circular truncated cone accommodation space has an upper bottom surface close to one end of the sample and a lower bottom surface away from the sample, and the area of the upper bottom surface is smaller than that of the lower bottom surface; the shape design can ensure the clamping force of the copper fixture on the pin and avoid the relative movement of the pin and the copper fixture after combination.
[0030] The two copper fixtures in the same set of fixture units form a wedge-shaped clamping block after combination, and the size of the wedge-shaped clamping block is adapted to the shape of the corresponding clamping groove of the Gleeble thermal-mechanical simulator; after assembly, the wedge-shaped clamping block and the corresponding clamping groove of the Gleeble thermal-mechanical simulator are tightly matched.
[0031] In the embodiment, the sample comprises a sample body and two inner grooves arranged at two ends of the sample body, respectively.
[0032] In the embodiment, the sample body is a cylinder.
[0033] In the embodiment, the depth of the two inner grooves at the two ends of the sample body is greater than or equal to the length of the cylindrical pin head of the pin.
[0034] In the embodiment, the diameter of the inner groove = the diameter of the cylindrical pin head + d; d is a reasonable difference, and the value range is 0-3 mm.
[0035] In the embodiment, the length of the sample body is ≤50 mm.
[0036] In the embodiment, the length of the sample body + 2x the length of the circular truncated cone body of the pin = 80mm + a reasonable difference, the value range is 0-3mm. Among them, the length of the circular truncated cone body of the pin is adjusted according to the change of the length of the sample body, and through the design of the pin, the sample with a length of ≤50mm can also be tested by using the Gleeble thermal simulation testing machine.
[0037] In the embodiment, the circular truncated cone body and the cylindrical pin head of the pin are made of copper. The shaft pin is arranged on the central axis of the copper fixture, and the small sample non-clamping force heat treatment fixture for the Gleeble thermal simulation testing machine provided by the utility model clamps the sample through the cylindrical shaft pin head of the two shaft pins located at both ends of the sample, realizes the heat treatment of the small sample without clamping force, solves the problem of low cold speed of the sample by using the compression clamp, solves the problem that the small sample cannot be stably expanded due to the small clamping force, and the experimental result is inaccurate due to the creep of the sample caused by the large clamping force, and the gleeble cannot be used for the small sample dynamic / static CCT.
[0038] The small sample non-clamping force heat treatment fixture for the Gleeble thermal simulation testing machine provided by the utility model can heat treat the sample without clamping force, and can also use the small sample to do the CCT experiment, solves the problem that the gleeble cannot use the short sample to do the CCT experiment due to the clamping force.
[0039] Taking the static CCT experiment as an example, the use method of the small sample non-clamping force heat treatment fixture for the Gleeble thermal simulation testing machine provided by the utility model is that: after assembling the whole small sample non-clamping force heat treatment fixture, the small sample non-clamping force heat treatment fixture is assembled into the corresponding clamping groove cavity of the thermal simulation testing machine; the thermocouple is welded on the temperature equalizing area of the sample, and the quartz rod of the dilatometer is clamped to the temperature equalizing area of the sample; the thermal simulation test program is opened, and the program is set to record the expansion data.
[0040] Finally, it should be pointed out that the above-mentioned is only the preferred embodiment of the utility model, and is not used to limit the utility model, and for the ordinary skilled person in the art, the aforementioned technical solutions can still be modified or deformed and improved, which belongs to the protection range of the utility model.
Claims
1. A small-pattern, non-clamping force heat treatment fixture for a Gleeble thermal mechanical simulator, characterized by, The fixture comprises a sample with inner grooves at both ends, and two sets of fixture units connected by a pin at the grooves at both ends of the sample; The two sets of fixture units are identical in structure, each set of fixture units comprising a pin and two copper fixtures of the same shape; The pin comprises a circular truncated cone body and a cylindrical pin head arranged at one end of the circular truncated cone body; the cylindrical pin head and the upper bottom surface of the circular truncated cone body are arranged perpendicular to each other; Each set of fixture units is connected by the cylindrical pin head of the pin and the inner groove at one end of the sample; Each copper fixture is a quadrangular prism with a right-angled trapezoidal longitudinal section, and a semicircular truncated cone groove is arranged at the central axis of the side surface of the right-angled waist of the copper fixture; the two semicircular truncated cone grooves of the two copper fixtures in the same set of fixture units jointly define a space for accommodating the circular truncated cone body of the pin.
2. The small-gauge, clamp-force-free heat treatment fixture for a Gleeble thermal mechanical simulator according to claim 1, characterized in that, The sample comprises a sample body and two inner grooves arranged at both ends of the sample body, respectively.
3. The small-gauge, clamp-force-free heat treatment fixture for a Gleeble thermal mechanical simulator according to claim 2, characterized in that, The sample body is a cylinder.
4. The small-gauge, clamp-force-free heat treatment fixture for a Gleeble thermal mechanical simulator according to claim 2, characterized in that, The depth of the two inner grooves at both ends of the sample body is greater than or equal to the length of the cylindrical pin head of the pin.
5. The small-gauge, clamp-force-free heat treatment fixture for a Gleeble thermal mechanical simulator of claim 2, wherein The diameter of the inner groove = the diameter of the cylindrical pin head + d; d is a reasonable difference, and the value range is 0-3 mm.
6. The small-gauge, clamp-force-free heat treatment fixture for a Gleeble thermal mechanical simulator of claim 2, wherein The length of the sample body is ≤50 mm.
7. The small-gauge, clamp-force-free heat treatment fixture for a Gleeble thermal mechanical simulator of claim 2, wherein The length of the sample body + 2×the length of the circular truncated cone body of the pin = 80 mm + a reasonable difference, and the value range is 0-3 mm.
8. The small-gauge, clamp-force-free heat treatment fixture for a Gleeble thermal mechanical simulator of claim 2, wherein, The circular truncated cone body and the cylindrical pin head of the pin are both made of copper.