Hardness testing device for precision casting shell

Abstract

The utility model relates to the technical field of hardness testing devices, in particular to a precision casting shell hardness testing device which comprises a testing assembly, the testing assembly comprises a testing table, and a placing frame is fixedly connected to the middle of the upper surface of the testing table. A clamping electric cylinder drives a toothed plate to move forwards, the toothed plate drives a gear, a rotating shaft and a rotating rod to rotate anticlockwise, the rotating rod pulls a transmission rod, the transmission rod pulls a sliding plate, a vertical rod, a connecting plate and a clamping plate to be close to each other, and the clamping plate clamps and fixes a precision casting shell workpiece. When the pressing block makes contact with the surface of the precision casting shell workpiece, the lifting plate continues to move downwards to the pressing block to extrude the pressure sensor, the pressure sensor can test the pressure value of the pressing block on the precision casting shell workpiece and transmit pressure value data to the control panel, and the pressure value data is displayed through the display panel; therefore, the pressure value when the precision casting shell workpiece is pressed and deformed can be visually seen.

Description

Technical Field

[0001] The utility model relates to the technical field of hardness testing devices, in particular to a precision casting shell hardness testing device. Background Art

[0002] Precision casting is a general term for the process of obtaining castings with precise dimensions. Compared with the traditional sand casting process, the castings obtained by precision casting are more precise in size and have better surface finish. It includes: investment casting, ceramic casting, metal casting, pressure casting, lost foam casting. Precision casting is also called lost wax casting. Its products are precise, complex, and close to the final shape of the parts. They can be used directly without or with little processing. It is an advanced process for near-net-shape forming.

[0003] After the precision casting shell workpiece is processed, it needs to undergo multiple tests before leaving the factory, such as size test, sealing test, waterproof test and hardness test. At present, when performing hardness test, the precision casting shell workpiece to be tested is generally placed on the test table, and the shell is pressed down by a pressure block to test its hardness. In this way, although it can be observed whether the shell is deformed, the critical value of the shell compression deformation cannot be directly observed, and the shell may shift when under pressure, affecting the smooth progress of the precision casting shell hardness test. For this reason, a precision casting shell hardness testing device is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a precision casting shell hardness testing device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a precision casting shell hardness testing device, including a testing component, the testing component including a testing table, a placing frame fixedly connected to the middle of the upper surface of the testing table, a precision casting shell workpiece is placed on the upper surface of the placing frame, the outer wall of the placing frame is symmetrically and slidably connected with two slides, the upper surface of the slide is fixedly provided with a vertical rod, the top of the vertical rod is fixedly connected with a connecting plate, the opposite sides of the two connecting plates are provided with connecting blocks, the end of the connecting block away from the connecting plate is fixedly connected with a clamping plate, a rotating shaft is rotatably connected between the top wall of the inner side wall of the placing frame and the upper surface of the testing table through a bearing, two rotating rods are symmetrically fixedly provided on the middle of the outer wall of the rotating shaft, and the rotating rod is hinged at one end away from the rotating shaft A transmission rod is connected, and one end of the transmission rod away from the rotating rod is hinged to the outer wall of the slide plate, and a gear is fixedly connected to the lower part of the outer wall of the rotating shaft. A clamping electric cylinder is installed on the front side of the upper surface of the test bench, and one end of the piston rod of the clamping electric cylinder is fixedly connected to a toothed plate, and the toothed plate is meshed with the gear. A fixing frame is fixedly connected to the rear side of the upper surface of the test bench, and a test electric cylinder is installed on the inner side wall and top wall of the fixing frame. One end of the piston rod of the test electric cylinder is fixedly connected to a lifting plate, and two sleeves are symmetrically fixed on the lower surface of the lifting plate, and a sleeve rod is slidably connected to the inner side wall of the sleeve, and a pressure block is fixedly connected to the bottom of the sleeve rod, and a pressure sensor is installed in the middle part of the lower surface of the lifting plate, and a control panel and a display panel are respectively installed on the right side of the upper surface of the test bench.

[0006] As a further preferred embodiment of the present technical solution: the electrical output end of the pressure sensor is electrically connected to the electrical input end of the control board through a wire, and the electrical output end of the control board is electrically connected to the electrical input ends of the clamping electric cylinder, the test electric cylinder and the display board through wires respectively.

[0007] As a further preferred embodiment of the present technical solution: universal wheels are evenly installed on the lower surface of the test bench.

[0008] As a further preferred embodiment of the technical solution: slots are evenly formed on opposite sides of the two connecting plates, and the outer side walls of the connecting blocks are plugged into the inner side walls of the slots.

[0009] As a further preferred embodiment of the technical solution: a pin rod is threadedly connected to the upper surface of the connecting plate, and a pin hole is opened on the upper surface of the connecting block.

[0010] As a further preferred embodiment of the present technical solution: a knob is fixedly connected to the top end of the pin rod.

[0011] As a further preferred embodiment of the present technical solution: two push handles are symmetrically fixedly connected to the top of the outer side wall of the test bench.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model drives the tooth plate to move forward by clamping the electric cylinder, and the tooth plate drives the gear, the rotating shaft and the rotating rod to rotate counterclockwise, and the rotating rod pulls the transmission rod, and the transmission rod pulls the slide plate, the vertical rod, the connecting plate and the clamp plate to approach each other, and the clamp plate clamps and fixes the precision casting shell workpiece, and drives the lifting plate, the pressure sensor and the pressure block to move downward by the test electric cylinder until the pressure block contacts the surface of the precision casting shell workpiece, and the lifting plate continues to move downward to the pressure block to squeeze the pressure sensor, and the pressure sensor can test the pressure value of the pressure block on the precision casting shell workpiece and transmit the pressure value data to the control board, which is displayed on the display board, thereby intuitively seeing the pressure value when the precision casting shell workpiece is compressed and deformed, completing the hardness test of the precision casting shell workpiece, and due to the clamping and fixing of the clamp plate, the precision casting shell workpiece will not shift, thereby ensuring the smooth progress of the hardness test. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a left-side structural schematic diagram of the utility model;

[0015] Figure 2 It is a right view structural schematic diagram of the utility model;

[0016] Figure 3 For the utility model Figure 1 A magnified view of the structure of area A;

[0017] Figure 4 This is a schematic diagram of the structure of the slide plate and the vertical rod in the utility model;

[0018] Figure 5 It is a structural schematic diagram of the connecting block and the pin hole in the utility model;

[0019] Figure 6 It is a structural schematic diagram of the slot and the pin rod in the utility model.

[0020] In the figure: 1. test bench; 2. placement rack; 3. precision casting shell workpiece; 4. slide plate; 5. vertical rod; 6. connecting plate; 7. connecting block; 8. clamping plate; 9. rotating shaft; 10. rotating rod; 11. transmission rod; 12. gear; 13. clamping electric cylinder; 14. tooth plate; 15. fixing frame; 16. test electric cylinder; 17. lifting plate; 18. sleeve; 19. sleeve rod; 20. pressure block; 21. pressure sensor; 22. control board; 23. display board; 24. universal wheel; 25. slot; 26. pin rod; 27. pin hole; 28. knob; 29. ​​push handle. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as limitations on the present application. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "set" should be understood in a broad sense, for example, it 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 the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] See also Figure 1-6The utility model provides a technical solution: a precision casting shell hardness testing device, including a testing assembly, the testing assembly includes a testing table 1, a placing frame 2 is fixedly connected to the middle of the upper surface of the testing table 1, a precision casting shell workpiece 3 is placed on the upper surface of the placing frame 2, and the outer wall of the placing frame 2 is symmetrically slidably connected with two slides 4, the upper surface of the slide 4 is fixedly provided with a vertical rod 5, the top of the vertical rod 5 is fixedly connected with a connecting plate 6, the opposite sides of the two connecting plates 6 are provided with a connecting block 7, the end of the connecting block 7 away from the connecting plate 6 is fixedly connected with a clamping plate 8, the inner side wall top wall of the placing frame 2 and the upper surface of the testing table 1 are rotatably connected with a rotating shaft 9 through a bearing, the rotating shaft Two rotating rods 10 are symmetrically fixed on the middle part of the outer wall of 9, and the end of the rotating rod 10 away from the rotating shaft 9 is hinged with a transmission rod 11, and the end of the transmission rod 11 away from the rotating rod 10 is hinged to the outer wall of the slide plate 4, and the lower part of the outer wall of the rotating shaft 9 is fixedly connected with a gear 12. A clamping electric cylinder 13 is installed on the front side of the upper surface of the test bench 1, and one end of the piston rod of the clamping electric cylinder 13 is fixedly connected with a toothed plate 14, and the toothed plate 14 is meshed with the gear 12. A fixing frame 15 is fixedly connected to the rear side of the upper surface of the test bench 1, and a test electric cylinder 16 is installed on the top wall of the inner wall of the fixing frame 15. One end of the piston rod of the test electric cylinder 16 is fixedly connected with a lifting plate 17, and the lower surface of the lifting plate 17 Two sleeves 18 are symmetrically fixed, and the inner wall of the sleeve 18 is slidably connected with a sleeve rod 19, and the bottom of the sleeve rod 19 is fixedly connected with a pressure block 20. A pressure sensor 21 is installed in the middle of the lower surface of the lifting plate 17, and a control board 22 and a display board 23 are installed on the right side of the upper surface of the test bench 1. The precision casting shell workpiece 3 is placed on the placement rack 2, and the gear plate 14 is driven to move forward by shortening one end of the piston rod of the clamping electric cylinder 13. The gear plate 14 drives the gear 12, the rotating shaft 9 and the rotating rod 10 to rotate counterclockwise, and the rotating rod 10 pulls the transmission rod 11, and the transmission rod 11 pulls the slide plate 4, the vertical rod 5, the connecting plate 6 and the clamping plate 8 to move closer to each other, and the clamping plate 8 will cast the precision casting shell The workpiece 3 is clamped and fixed, and one end of the piston rod of the test electric cylinder 16 is extended to drive the lifting plate 17, the pressure sensor 21 and the pressure block 20 to move downward, until the pressure block 20 contacts the surface of the precision casting shell workpiece 3, and the lifting plate 17 continues to move downward to the pressure block 20 to squeeze the pressure sensor 21, and the pressure block 20 continues to apply pressure to the precision casting shell workpiece 3. The pressure sensor 21 can test the pressure value of the pressure block 20 on the precision casting shell workpiece 3 and transmit the pressure value data to the control board 22, which is displayed on the display board 23. Therefore, the pressure value when the precision casting shell workpiece 3 is compressed and deformed can be intuitively seen, thereby completing the hardness test of the precision casting shell workpiece 3.

[0024] In the present embodiment, specifically: the electrical output end of the pressure sensor 21 is electrically connected to the electrical input end of the control board 22 through a wire, and the electrical output end of the control board 22 is electrically connected to the electrical input ends of the clamping electric cylinder 13, the test electric cylinder 16 and the display board 23 through wires, respectively; so as to facilitate signal transmission.

[0025] In this embodiment, specifically: universal wheels 24 are evenly installed on the lower surface of the test bench 1 to facilitate the movement of the test bench 1 .

[0026] In this embodiment, specifically: slots 25 are evenly opened on opposite sides of the two connecting plates 6, and the outer side walls of the connecting blocks 7 are inserted into the inner side walls of the slots 25, so as to facilitate the connection between the connecting blocks 7 and the connecting plates 6.

[0027] In this embodiment, specifically: the upper surface of the connecting plate 6 is threadedly connected with a pin rod 26, and the upper surface of the connecting block 7 is provided with a pin hole 27; the contour of the clamping plate 8 can be customized according to the shape of the precision casting shell workpiece 3 to ensure that it fits the outer wall of the precision casting shell workpiece 3 when clamped, and when the pin rod 26 is rotated clockwise, the pin rod 26 is inserted into the pin hole 27 to lock the connecting block 7 and the clamping plate 8, and when the clamping plate 8 needs to be replaced, the pin rod 26 is rotated counterclockwise to make the pin rod 26 leave the pin hole 27, and the connecting block 7 can be removed and replaced with a suitable clamping plate 8.

[0028] In this embodiment, specifically: a knob 28 is fixedly connected to the top of the pin rod 26 to facilitate turning the pin rod 26 .

[0029] In this embodiment, specifically: two push handles 29 are symmetrically fixedly connected to the top of the outer side wall of the test bench 1 to facilitate pushing the test bench 1 to move to the target position.

[0030] The working principle of the utility model is as follows: the precision casting shell workpiece 3 is placed on the placement rack 2, and the gear plate 14 is driven to move forward by shortening one end of the piston rod of the clamping electric cylinder 13, and the gear plate 14 drives the gear 12, the rotating shaft 9 and the rotating rod 10 to rotate counterclockwise, and the rotating rod 10 pulls the transmission rod 11, and the transmission rod 11 pulls the slide plate 4, the vertical rod 5, the connecting plate 6 and the clamping plate 8 to approach each other, and the clamping plate 8 clamps and fixes the precision casting shell workpiece 3, and the lifting plate 17, the pressure sensor 21 and the pressure block 20 are driven to move downward by extending one end of the piston rod of the test electric cylinder 16, until the pressure block 20 contacts the precision casting shell workpiece 3, the lifting plate 17 continues to move down to the pressing block 20 to squeeze the pressure sensor 21, and the pressing block 20 continues to apply pressure to the precision casting shell workpiece 3. The pressure sensor 21 can test the pressure value of the pressing block 20 on the precision casting shell workpiece 3 and transmit the pressure value data to the control board 22, which is displayed by the display board 23. Therefore, it can be intuitively seen that the pressure value when the precision casting shell workpiece 3 is compressed and deformed is completed. The hardness test of the precision casting shell workpiece 3 is completed, and due to the clamping and fixing of the clamping plate 8, the precision casting shell workpiece 3 will not shift, ensuring the smooth progress of the hardness test.

[0031] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A precision casting shell hardness testing device, comprising a testing assembly, characterized in that: The test assembly comprises a test bench (1), a placement rack (2) is fixedly connected to the middle of the upper surface of the test bench (1), a precision casting shell workpiece (3) is placed on the upper surface of the placement rack (2), two slide plates (4) are symmetrically slidably connected to the outer side wall of the placement rack (2), a vertical rod (5) is fixedly provided on the upper surface of the slide plate (4), a connecting plate (6) is fixedly connected to the top of the vertical rod (5), and connecting blocks (7) are provided on opposite sides of the two connecting plates (6), The end of the connecting block (7) away from the connecting plate (6) is fixedly connected to a clamping plate (8); a rotating shaft (9) is rotatably connected between the inner wall and the top wall of the placement frame (2) and the upper surface of the test bench (1) via a bearing; two rotating rods (10) are symmetrically fixedly provided in the middle of the outer wall of the rotating shaft (9); the end of the rotating rod (10) away from the rotating shaft (9) is hinged to a transmission rod (11); and the end of the transmission rod (11) away from the rotating rod (10) is hinged to the slide plate (4). The outer wall of the rotating shaft (9) is fixedly connected to a gear (12) at the lower part of the outer wall of the rotating shaft (9); a clamping electric cylinder (13) is installed on the front side of the upper surface of the testing platform (1); one end of the piston rod of the clamping electric cylinder (13) is fixedly connected to a toothed plate (14); the toothed plate (14) is meshingly connected to the gear (12); a fixing frame (15) is fixedly connected to the rear side of the upper surface of the testing platform (1); a testing electric cylinder (16) is installed on the top wall of the inner wall of the fixing frame (15); One end of the piston rod of the test electric cylinder (16) is fixedly connected to a lifting plate (17), two sleeves (18) are symmetrically fixedly provided on the lower surface of the lifting plate (17), a sleeve rod (19) is slidably connected to the inner wall of the sleeve (18), a pressure block (20) is fixedly connected to the bottom of the sleeve rod (19), a pressure sensor (21) is installed in the middle of the lower surface of the lifting plate (17), and a control panel (22) and a display panel (23) are respectively installed on the right side of the upper surface of the test bench (1).

2. The precision casting shell hardness testing device according to claim 1 is characterized in that: The electrical output end of the pressure sensor (21) is electrically connected to the electrical input end of the control panel (22) via a wire, and the electrical output end of the control panel (22) is electrically connected to the electrical input ends of the clamping electric cylinder (13), the testing electric cylinder (16) and the display panel (23) via wires.

3. The precision casting shell hardness testing device according to claim 1 is characterized in that: Universal wheels (24) are evenly mounted on the lower surface of the test bench (1).

4. The precision casting shell hardness testing device according to claim 1, characterized in that: Slots (25) are evenly provided on opposite sides of the two connecting plates (6), and the outer side walls of the connecting blocks (7) are plugged into the inner side walls of the slots (25).

5. The precision casting shell hardness testing device according to claim 1, characterized in that: The upper surface of the connecting plate (6) is threadedly connected with a pin rod (26), and the upper surface of the connecting block (7) is provided with a pin hole (27).

6. The precision casting shell hardness testing device according to claim 5, characterized in that: The top end of the pin rod (26) is fixedly connected with a knob (28).

7. The precision casting shell hardness testing device according to claim 1, characterized in that: Two push handles (29) are symmetrically fixedly connected to the top of the outer side wall of the test bench (1).

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