A thermal fatigue testing machine for mold steel

Abstract

The present invention relates to the technical field of heat fatigue resistance testing machines, and more specifically, to a heat fatigue resistance testing machine for mold steel. The machine comprises a testing machine body, a bottom plate fixedly provided at the bottom of the testing machine body near a constant temperature water tank, a first cylinder fixedly provided in the middle of the top of the bottom plate, a support frame rotatably provided on the top of the first cylinder, and an L-shaped plate fixedly provided on the top of the testing machine body near the constant temperature water tank. The present invention uses a second cylinder to drive the support seat to transfer the mold steel that has undergone heat resistance testing, and then uses the first cylinder to drive the support frame to raise the mold steel on the top of the support seat to a suitable position, and finally uses a magnifying glass to observe the cracks in the mold steel. The device integrates heat resistance testing and post-test observation equipment, thereby avoiding the time-consuming and labor-intensive problem of transferring the mold steel and improving the overall efficiency of mold steel testing.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal fatigue resistance testing machines, in particular to a thermal fatigue resistance testing machine for die steel. Background Art

[0002] Thermal fatigue, also known as hot and cold fatigue or cracking, refers to the fact that when the mold is working, due to the large temperature difference on the surface of the mold cavity and the effect of rapid cooling and heating, the mold surface produces large thermal stress. When the temperature changes repeatedly, this thermal stress also changes accordingly. In addition, the die-casting mold and hot forging mold are subject to large mechanical loads, which makes it easy for thermal fatigue cracks to occur. This crack is a surface crack, generally shallow, and expands inward under the action of mechanical stress, eventually causing fracture failure.

[0003] Before use, mold steel also needs to be tested for thermal fatigue resistance. The existing instruments for mold steel thermal fatigue resistance testing include the NBD-LT series hot and cold fatigue testing machines. After the instrument performs thermal fatigue resistance testing on the mold steel, the staff needs to take out the mold steel that has undergone thermal resistance testing for observation, so as to summarize the mold steel's thermal resistance performance data, etc. However, the process of transferring the mold steel is time-consuming and labor-intensive, which may reduce the efficiency of mold steel testing. Summary of the Invention

[0004] The object of the present invention is to provide a thermal fatigue testing machine for mold steel to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides a mold steel thermal fatigue resistance testing machine, including a testing machine body, wherein the bottom of the testing machine body is fixedly provided with a bottom plate on the side close to the constant temperature water tank, a first cylinder is fixedly provided at the middle position of the top of the bottom plate, a support frame is rotatably provided on the top of the first cylinder, an L-shaped plate is fixedly provided on the top of the side close to the constant temperature water tank, a second cylinder is fixedly provided at a position close to the bottom of the side wall of the L-shaped plate close to the heating chamber, a base is fixedly provided at the movable end of the second cylinder, a first circular groove is provided on the top of the base, a second circular groove is provided on the bottom of the base, the first circular groove is connected to the second circular groove, the diameter of the first circular groove is larger than the diameter of the second circular groove, a support seat is slidably provided in the first circular groove, a card slot adapted to the support frame is provided at the bottom of the support seat, a turntable is rotatably provided on the side wall of the L-shaped plate close to the heating chamber, the turntable is located at the top of the second cylinder, and a magnifying glass is hinged on one side of the turntable.

[0006] As a further improvement of this technical solution, the L-shaped plate is provided with a long groove running through it, and a fixed column is provided on the side of the turntable away from the magnifying glass for rotation. The fixed column is located in the long groove and slides up and down. A knob is threadedly connected to the side of the fixed column away from the turntable.

[0007] As a further improvement of the present technical solution, a cavity is provided inside the support seat, a suction cup groove is provided on the top of the support seat, the suction cup groove is connected to the cavity, an air pump is provided in the cavity, a suction cup is fixed on the top of the air pump, and the suction cup is fixed in the suction cup groove.

[0008] As a further improvement of the present technical solution, a plurality of anti-slip protrusions are provided on the top of the support seat.

[0009] As a further improvement of the technical solution, a fan is fixedly provided at the bottom of one end of the L-shaped plate, and the fan faces the bottom plate.

[0010] As a further improvement of the present technical solution, a plurality of lighting lamps are fixedly provided at the bottom of one end of the L-shaped plate, and the plurality of lighting lamps are respectively located on both sides of the fan.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] This device is used in a mold steel heat fatigue resistance testing machine. The mold steel that has undergone heat resistance testing is transferred by using the second cylinder to drive the support base, and then the mold steel on the top of the support base is raised to a suitable position by using the first cylinder. Finally, a magnifying glass is used to observe the cracks in the mold steel. The device integrates heat resistance testing and post-test observation equipment, avoiding the time-consuming and labor-intensive problem of transferring the mold steel and improving the overall efficiency of mold steel testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 This is the second schematic diagram of the overall structure of the present invention;

[0015] Figure 3 It is a schematic diagram of the partial structure of the present invention;

[0016] Figure 4 It is a cross-sectional schematic diagram of the support base structure of the present invention;

[0017] Figure 5 It is a schematic cross-sectional view of part of the structure of the present invention;

[0018] Figure 6 It is a partial structural schematic diagram of the present invention;

[0019] Figure 7 It is a schematic side view of part of the structure of the present invention;

[0020] Figure 8 This is the third schematic diagram of the overall structure of the present invention.

[0021] The meaning of each number in the figure is:

[0022] 100. Detection machine body; 110. Bottom plate; 111. First cylinder; 112. Support frame; 120. L-shaped plate; 121. Second cylinder; 122. Base; 123. First circular groove; 124. Second circular groove; 130. Support seat; 131. Slot; 132. Cavity; 133. Suction cup groove; 134. Air pump; 135. Suction cup; 136. Anti-slip bump; 140. Turntable; 141. Magnifying glass; 142. Long groove; 143. Fixing column; 144. Knob; 150. Fan; 151. Light. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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.

[0024] See also Figures 1-8 As shown, the present invention provides a thermal fatigue tester for mold steel, comprising a tester body 100, a bottom plate 110 is fixedly provided at the bottom of the tester body 100 near the thermostatic water tank, a first cylinder 111 is fixedly provided at the center of the top of the bottom plate 110, a support frame 112 is rotatably provided at the top of the first cylinder 111, an L-shaped plate 120 is fixedly provided at the top of the tester body 100 near the thermostatic water tank, a second cylinder 121 is fixedly provided at the bottom of the side wall of the L-shaped plate 120 near the heating chamber, a base 122 is fixedly provided at the movable end of the second cylinder 121, a first circular groove 123 is provided at the top of the base 122, a second circular groove 124 is provided at the bottom of the base 122, the first circular groove 123 is communicated with the second circular groove 124, and the diameter of the first circular groove 123 is larger than that of the second circular groove 12 4 in diameter, a support seat 130 is slidably provided in the first circular groove 123, and a card slot 131 adapted to the support frame 112 is provided at the bottom of the support seat 130, whose main purpose is: when the first cylinder 111 is working, it can drive the support frame 112 to rise, so that the support frame 112 passes through the base 122 and then rises into the card slot 131, and then the support frame 112 continues to rise, and finally drives the support seat 130 to rise, and the L-shaped plate 120 is rotatably provided with a turntable 140 on the side wall of the heating chamber. The turntable 140 is located at the top of the second cylinder 121, and a magnifying glass 141 is hinged on one side of the turntable 140. Its main purpose is: through the turntable 140 and the L-shaped plate 120 being rotatably connected, the magnifying glass 141 is hinged to the turntable 140, so that the observation angle of the magnifying glass 141 can be adjusted.

[0025] Working principle:

[0026] During use, after the mold steel is tested for heat resistance in the detection machine body 100, the telescopic lifting platform is controlled to move the mold steel to the middle position between the heating cavity and the constant temperature water tank, and then the second cylinder 121 is controlled to move the base 122 to the far left, that is, the base 122 is moved to the middle position between the heating cavity and the constant temperature water tank, and then the mold steel on the telescopic lifting platform is placed on the support seat 130, and then the second cylinder 121 is controlled to move the base 122 to the far right, and then the first cylinder 111 is controlled to make the support frame 112 rise slowly until the support frame 112 passes through the base 122 and lifts the support seat 130, and the first cylinder 111 is controlled to move the support seat 130 to a position where the magnifying glass 141 can observe, and then the first cylinder 111 is stopped, and the cracks in the mold steel can be observed by rotating the magnifying glass 141.

[0027] In the above description, because the height of the magnifying glass 141 cannot be adjusted, the L-shaped plate 120 is provided with a through long slot 142, and a fixing column 143 is rotatably provided on the side of the turntable 140 away from the magnifying glass 141. The fixing column 143 is located in the long slot 142 and slides up and down. The side of the fixing column 143 away from the turntable 140 is threadedly connected with a knob 144, so that after loosening the knob 144, the fixing column 143 can be moved up and down to a suitable height, and then the knob 144 can be tightened to fix it, so that the staff can adjust the height of the magnifying glass 141 according to their own situation, height, etc.

[0028] In order to prevent the mold steel from slipping when the mold steel is moved and the support frame 112 is rotated to observe the mold steel, a cavity 132 is opened inside the support seat 130, and a suction cup groove 133 is opened on the top of the support seat 130. The suction cup groove 133 is connected to the cavity 132. An air pump 134 is provided in the cavity 132, and a suction cup 135 is fixed on the top of the air pump 134. The suction cup 135 is fixed in the suction cup groove 133, so that the suction cup 135 can adsorb the mold steel on the top of the support seat 130.

[0029] If the mold steel is taken out of the heating cavity, the temperature will be too high. If it is taken out of the constant temperature water tank, it will be stained with water. Therefore, a plurality of anti-slip bumps 136 are provided on the top of the support seat 130, which can not only help the mold steel to quickly dissipate heat, but also accelerate the volatilization of water stains on the mold steel, thereby avoiding affecting the observation of mold steel cracks.

[0030] In addition, the mold steel mentioned above may be high temperature or have water stains, so a fan 150 is fixedly installed at the bottom of one end of the L-shaped plate 120, and the fan 150 faces the bottom plate 110. When the fan 150 is working, it can either help dissipate heat from the mold steel or help dry the water stains on the mold steel.

[0031] Finally, in order to avoid adverse effects on the observation of mold steel under undesirable lighting conditions, a plurality of lighting lamps 151 are fixedly provided at the bottom of one end of the L-shaped plate 120. The plurality of lighting lamps 151 are respectively located on both sides of the fan 150. Therefore, when observing the mold steel, the power switch of the lighting lamp 151 can be turned on to provide good lighting conditions for observation.

[0032] In the specific use of the mold steel heat fatigue tester of this embodiment, after the mold steel is subjected to heat resistance test in the tester body 100, the telescopic lifting platform is controlled to move the mold steel to the middle position between the heating cavity and the constant temperature water tank, and then the second cylinder 121 is controlled to move the base 122 to the far left, that is, the base 122 is moved to the middle position between the heating cavity and the constant temperature water tank, and then the mold steel on the telescopic lifting platform is placed on the support base 130, and the air pump 134 is controlled to make the suction cup 135 suck the mold steel, and then the power switch of the lighting lamp 151 is turned on and the second cylinder is controlled. 121 moves the base 122 to the far right, and after moving to the far right, turn on the power switch of the fan 150, then control the first cylinder 111 to slowly raise the support frame 112 until the support frame 112 passes through the base 122 and lifts the support seat 130, control the first cylinder 111 to move the support seat 130 to a height that the staff feels comfortable with, then loosen the knob 144 and move the magnifying glass 141 up and down until the magnifying glass 141 can observe the mold steel on the top of the support seat 130, and finally tighten the knob 144 and observe the cracks in the mold steel by rotating the magnifying glass 141.

[0033] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A mold steel thermal fatigue resistance testing machine, comprising a testing machine body (100), characterized in that: A bottom plate (110) is fixedly provided at the bottom of the detection machine body (100) near the thermostatic water tank, a first cylinder (111) is fixedly provided at the center of the top of the bottom plate (110), a support frame (112) is rotatably provided at the top of the first cylinder (111), an L-shaped plate (120) is fixedly provided at the top of the detection machine body (100) near the thermostatic water tank, a second cylinder (121) is fixedly provided at a position near the bottom of the side wall of the heating chamber of the L-shaped plate (120), a base (122) is fixedly provided at the movable end of the second cylinder (121), a first circular groove (123) is provided at the top of the base (122), and the first circular groove (123) is provided at the top of the first cylinder (111). A second circular groove (124) is provided at the bottom of the base (122), the first circular groove (123) is connected to the second circular groove (124), the diameter of the first circular groove (123) is larger than the diameter of the second circular groove (124), a support seat (130) is slidably provided in the first circular groove (123), a card slot (131) adapted to the support frame (112) is provided at the bottom of the support seat (130), a turntable (140) is rotatably provided on the side wall of one side of the L-shaped plate (120) close to the heating chamber, the turntable (140) is located at the top of the second cylinder (121), and a magnifying glass (141) is hinged on one side of the turntable (140).

2. The mold steel thermal fatigue resistance testing machine according to claim 1, characterized in that: The L-shaped plate (120) is provided with a through-groove (142), and a fixing post (143) is rotatably provided on a side of the turntable (140) away from the magnifying glass (141). The fixing post (143) is located in the long groove (142) and slides up and down. A knob (144) is threadedly connected to the side of the fixing post (143) away from the turntable (140).

3. The mold steel thermal fatigue resistance testing machine according to claim 2, characterized in that: A cavity (132) is provided inside the support base (130), a suction cup groove (133) is provided on the top of the support base (130), the suction cup groove (133) is communicated with the cavity (132), an air pump (134) is provided in the cavity (132), a suction cup (135) is fixed on the top of the air pump (134), and the suction cup (135) is fixed in the suction cup groove (133).

4. The mold steel thermal fatigue resistance testing machine according to claim 3, characterized in that: The top of the support seat (130) is provided with a plurality of anti-slip protrusions (136).

5. The mold steel thermal fatigue resistance testing machine according to claim 4, characterized in that: A fan (150) is fixedly provided at the bottom of one end of the L-shaped plate (120), and the fan (150) faces the bottom plate (110).

6. The mold steel thermal fatigue resistance testing machine according to claim 5, characterized in that: A plurality of lighting lamps (151) are fixedly provided at the bottom of one end of the L-shaped plate (120), and the plurality of lighting lamps (151) are respectively located on both sides of the fan (150).

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